U.S. patent application number 15/382064 was filed with the patent office on 2018-06-21 for fan coil apparatus including a humidification unit and a humidification unit.
The applicant listed for this patent is Omachron Intellectual Property Inc.. Invention is credited to Wayne Ernest Conrad.
Application Number | 20180172298 15/382064 |
Document ID | / |
Family ID | 62562321 |
Filed Date | 2018-06-21 |
United States Patent
Application |
20180172298 |
Kind Code |
A1 |
Conrad; Wayne Ernest |
June 21, 2018 |
FAN COIL APPARATUS INCLUDING A HUMIDIFICATION UNIT AND A
HUMIDIFICATION UNIT
Abstract
A fan coil includes a humidification unit having a water mist
distribution tube, a water impermeable container, and a drain
conduit. The water mist distribution tube has a plurality of
outlets. The water impermeable container is positioned below the
water mist distribution tube, and has a drain outlet. The drain
conduit is connected in fluid flow communication with the drain
outlet.
Inventors: |
Conrad; Wayne Ernest;
(Hampton, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Omachron Intellectual Property Inc. |
Hampton |
|
CA |
|
|
Family ID: |
62562321 |
Appl. No.: |
15/382064 |
Filed: |
December 16, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F24F 6/12 20130101; F24F
2006/008 20130101; F24F 6/04 20130101; F24F 2110/20 20180101; F24F
6/06 20130101; F24F 1/0007 20130101; F24F 6/18 20130101; F24F
2006/006 20130101; F24F 13/20 20130101 |
International
Class: |
F24F 6/12 20060101
F24F006/12; F24F 13/22 20060101 F24F013/22; F24F 13/20 20060101
F24F013/20; F24F 13/30 20060101 F24F013/30 |
Claims
1. A fan coil comprising a humidification unit, the humidification
unit comprising: (a) a water mist distribution tube having a
plurality of outlets; (b) a water impermeable container positioned
below the water mist distribution tube, the water impermeable
container having a drain outlet; and, (c) a drain conduit connected
in fluid flow communication with the drain outlet.
2. The fan coil of claim 1 wherein the humidification unit produces
a water mist wherein the water mist enters an air flow stream via
the plurality of outlets.
3. The fan coil of claim 2 wherein the humidification unit
comprises an ultrasonic humidifier.
4. The fan coil of claim 1 wherein the water mist distribution tube
is positioned in an air flow conduit, the air flow conduit has a
length in a direction transverse to a direction of air flow through
the air flow conduit and the water mist distribution tube extends
at least substantially along the length of the air flow
conduit.
5. The fan coil of claim 4 wherein the water mist distribution tube
extends generally transverse to the direction of air flow through
the air flow conduit.
6. The fan coil of claim 1 wherein the water mist distribution tube
is a longitudinally extending tube having first and second opposed
ends wherein the water mist distribution tube extends upwardly from
the first end to the second end.
7. The fan coil of claim 6 wherein the first end comprises a water
mist inlet end.
8. The fan coil of claim 6 wherein the second end comprises a water
mist inlet end.
9. The fan coil of claim 1 wherein the water mist distribution tube
is a longitudinally extending tube having first and second opposed
ends wherein a central portion of the water mist distribution tube
is elevated with respect to the first and second ends.
10. The fan coil of claim 1 wherein the drain conduit is connected
in fluid flow communication with a drain.
11. The fan coil of claim 1 wherein the humidification unit further
comprises a water mist production member and the drain conduit is
connected in fluid flow communication with the humidification unit
at a location upstream of the water mist production member.
12. The fan coil of claim 11 wherein the water mist production
member comprises an ultrasonic humidifier and a water filter
upstream of the ultrasonic humidifier and the drain conduit is
connected in fluid flow communication with the humidification unit
upstream of the water filter.
13. The fan coil of claim 1 wherein the drain conduit is connected
in fluid flow communication with the humidification unit via a
venturi device.
14. The fan coil of claim 11 wherein the location upstream of the
water mist production member is positioned below the water
impermeable container whereby water drains from the water
impermeable container through the drain conduit under the influence
of gravity.
15. The fan coil of claim 1 wherein the drain conduit is connected
in fluid flow communication with a water reservoir of the
humidification unit.
16. A humidification unit for a fan coil, the humidification unit
comprising: (a) a water mist distribution tube having a plurality
of outlets; (b) a water impermeable container positioned below the
water mist distribution tube, the water impermeable container
having a drain outlet; and, (c) a drain conduit connected in fluid
flow communication with the drain outlet.
17. The humidification unit of claim 16 wherein the humidification
unit produces a water mist wherein the water mist enters an air
flow stream via the plurality of outlets.
18. The humidification unit of claim 17 wherein the humidification
unit comprises an ultrasonic humidifier.
19. The humidification unit of claim 16 wherein the humidification
unit further comprises a water mist production member and the drain
conduit is connected in fluid flow communication with the
humidification unit at a location upstream of the water mist
production member.
20. The humidification unit of claim 19 wherein the water mist
production member comprises an ultrasonic humidifier and a water
filter upstream of the ultrasonic humidifier and the drain conduit
is connected in fluid flow communication with the humidification
unit upstream of the water filter.
21. The humidification unit of claim 19 wherein the drain conduit
is connected in fluid flow communication with the humidification
unit via a venturi device.
22. The humidification unit of claim 19 wherein the location
upstream of the water mist production member is positioned below
the water impermeable container whereby water drains from the water
impermeable container through the drain conduit under the influence
of gravity.
23. The humidification unit of claim 16 wherein the drain conduit
is connected in fluid flow communication with a water reservoir of
the humidification unit.
Description
FIELD
[0001] This application relates to fan coil apparatus including a
humidification unit and humidification units.
BACKGROUND
[0002] A fan coil apparatus is a component part of many
residential, commercial, and industrial heating, ventilation and
air conditioning (HVAC) systems, which provide heated air to a room
in which they are installed or to multiple rooms. A fan coils
comprises a heating and/or cooling heat exchanger and a fan. Air to
be heated or cooled is introduced into the heat exchanger and
cooled or heated by ambient air that is to be exhausted from the
room. The fan coil apparatus may be controlled automatically by a
thermostat which may activate the fan coil apparatus as required to
maintain a set air temperature in the room.
SUMMARY
[0003] This summary is intended to introduce the reader to the more
detailed description that follows and not to limit or define any
claimed or as yet unclaimed invention. One or more inventions may
reside in any combination or sub-combination of the elements or
process steps disclosed in any part of this document including its
claims and figures.
[0004] In accordance with one broad aspect of the teachings
described herein, which may be used alone or in combination with
any other aspect, there is provided a water recovery system for a
fan coil assembly which is preferably located in the air exit
plenum or passage of a fan coil assembly. The water recovery system
comprises a member or members that retain water droplets, which may
be micro water droplets and optionally collects some or
substantially all or all of the droplets that are not evaporated by
air passing through the fan coil assembly.
[0005] In accordance with this aspect, there is provided a fan coil
apparatus comprising a humidification unit, the humidification unit
comprising: [0006] (a) a humidification unit water droplet outlet;
[0007] (b) an air permeable water retaining member positioned in an
air flow path downstream from a heating zone and downstream from
the humidification unit water droplet outlet; [0008] (c) a water
impermeable container positioned below the air permeable water
retaining member, the water impermeable container having a drain
outlet; and, [0009] (d) a drain conduit connected in fluid flow
communication with the drain outlet.
[0010] In some embodiments, the humidification unit may produce a
water mist wherein the water mist enters an air flow stream via the
humidification unit water droplet outlet.
[0011] In some embodiments, the humidification unit may comprise an
ultrasonic humidifier such as a nebulizer.
[0012] In some embodiments, the fan coil apparatus may further
comprise an air outlet plenum and the humidification unit is
located in the plenum.
[0013] In some embodiments, the air permeable water retaining
member may have a length in a direction transverse to a direction
of air flow through the air permeable water retaining member and
the humidification unit comprises a mist distributor generally
extending in the transverse direction.
[0014] In some embodiments, the drain conduit may be connected in
fluid flow communication with a drain.
[0015] In some embodiments, the humidification unit may further
comprise a water mist production member and the drain conduit may
be connected in fluid flow communication with the humidification
unit at a location upstream of the water mist production
member.
[0016] In some embodiments, the water mist production member may
comprise an ultrasonic humidifier and a water filter upstream of
the ultrasonic humidifier and the drain conduit may be connected in
fluid flow communication with the humidification unit upstream of
the water filter.
[0017] In some embodiments, the drain conduit may be connected in
fluid flow communication with the humidification unit via a
venturi.
[0018] In some embodiments, the location upstream of the water mist
production member may be positioned below the water impermeable
container whereby water drains from the water impermeable container
through the drain conduit under the influence of gravity.
[0019] In some embodiments, the drain conduit may be connected in
fluid flow communication with a water reservoir of the
humidification unit.
[0020] In some embodiments, the air permeable water retaining
member may be seated on the water impermeable container.
[0021] In some embodiments, the air permeable water retaining
member may be removably receivable from the container.
[0022] In accordance with this aspect, there is also provided a
humidification unit for a fan coil apparatus, the humidification
unit comprising: [0023] (a) a humidification unit water droplet
outlet; [0024] (b) an air permeable water retaining member
positioned in an air flow path downstream from a heating zone and
downstream from the humidification unit water droplet outlet;
[0025] (c) a water impermeable container positioned below the air
permeable water retaining member, the water impermeable container
having a drain outlet; and, [0026] (d) a drain conduit connected in
fluid flow communication with the drain outlet.
[0027] In some embodiments, the humidification unit may produce a
water mist wherein the water mist enters an air flow stream via the
humidification unit water droplet outlet.
[0028] In some embodiments, the humidification unit may comprise an
ultrasonic humidifier such as a nebulizer.
[0029] In some embodiments, the air permeable water retaining
member may have a length in a direction transverse to a direction
of air flow through the air permeable water retaining member and
the humidification unit comprises a mist distributor generally
extending in the transverse direction.
[0030] In some embodiments, the humidification unit may further
comprise a water mist production member and the drain conduit may
be connected in fluid flow communication with the humidification
unit at a location upstream of the water mist production
member.
[0031] In some embodiments, the water mist production member may
comprise an ultrasonic humidifier and a water filter upstream of
the ultrasonic humidifier and the drain conduit may be connected in
fluid flow communication with the humidification unit upstream of
the water filter.
[0032] In some embodiments, the drain conduit may be connected in
fluid flow communication with the humidification unit via a
venturi.
[0033] In some embodiments, the location upstream of the water mist
production member may be positioned below the water impermeable
container whereby water drains from the water impermeable container
through the drain conduit under the influence of gravity.
[0034] In some embodiments, the drain conduit may be connected in
fluid flow communication with a water reservoir of the
humidification unit.
[0035] In accordance with a second aspect of this disclosure, which
may be used alone or in combination with any other aspect, there is
provided a mist distributor which is configured to distribute the
water droplets, which are preferably micro water droplets such as
those produced by an ultrasonic humidifier, across part or all of
an air flow path and optionally to collect water droplets that are
not entrained or evaporated into the air stream.
[0036] In accordance with this second aspect, there is provided a
fan coil comprising a humidification unit, the humidification unit
comprising: [0037] (a) a water mist distribution tube having a
plurality of outlets; [0038] (b) a water impermeable container
positioned below the water mist distribution tube, the water
impermeable container having a drain outlet; and, [0039] (c) a
drain conduit connected in fluid flow communication with the drain
outlet.
[0040] In some embodiments, the humidification unit may produce a
water mist wherein the water mist enters an air flow stream via the
plurality of outlets.
[0041] In some embodiments, the humidification unit may comprise an
ultrasonic humidifier such as a nebulizer.
[0042] In some embodiments, the water mist distribution tube may be
positioned in an air flow conduit, the air flow conduit may have a
length in a direction transverse to a direction of air flow through
the air flow conduit and the water mist distribution tube may
extend at least substantially along the length of the air flow
conduit.
[0043] In some embodiments, the water mist distribution tube may
extend generally transverse to the direction of air flow through
the air flow conduit.
[0044] In some embodiments, the water mist distribution tube may be
a longitudinally extending tube having first and second opposed
ends wherein the water mist distribution tube may extend upwardly
from the first end to the second end. In some embodiments, the
first end may comprise a water mist inlet end and/or the second end
may comprise a water mist inlet end.
[0045] In some embodiments, the water mist distribution tube may be
a longitudinally extending tube having first and second opposed
ends wherein a central portion of the water mist distribution tube
may be elevated with respect to the first and second ends.
[0046] In some embodiments, the drain conduit may be connected in
fluid flow communication with a drain.
[0047] In some embodiments, the humidification unit may further
comprise a water mist production member and the drain conduit may
be connected in fluid flow communication with the humidification
unit at a location upstream of the water mist production
member.
[0048] In some embodiments, the water mist production member may
comprise an ultrasonic humidifier and a water filter upstream of
the ultrasonic humidifier and the drain conduit may be connected in
fluid flow communication with the humidification unit upstream of
the water filter.
[0049] In some embodiments, the drain conduit may be connected in
fluid flow communication with the humidification unit via a
venturi.
[0050] In some embodiments, the location upstream of the water mist
production member may be positioned below the water impermeable
container whereby water drains from the water impermeable container
through the drain conduit under the influence of gravity.
[0051] In some embodiments, the drain conduit may be connected in
fluid flow communication with a water reservoir of the
humidification unit.
[0052] In accordance with this second aspect, there is also
provided a humidification unit for a fan coil, the humidification
unit comprising: [0053] (a) a water mist distribution tube having a
plurality of outlets; [0054] (b) a water impermeable container
positioned below the water mist distribution tube, the water
impermeable container having a drain outlet; and, [0055] (c) a
drain conduit connected in fluid flow communication with the drain
outlet.
[0056] In some embodiments, the humidification unit may produce a
water mist wherein the water mist enters an air flow stream via the
plurality of outlets.
[0057] In some embodiments, the humidification unit may comprise an
ultrasonic humidifier such as a nebulizer.
[0058] In some embodiments, the humidification unit may further
comprise a water mist production member and the drain conduit may
be connected in fluid flow communication with the humidification
unit at a location upstream of the water mist production
member.
[0059] In some embodiments, the water mist production member may
comprise an ultrasonic humidifier and a water filter upstream of
the ultrasonic humidifier and the drain conduit may be connected in
fluid flow communication with the humidification unit upstream of
the water filter.
[0060] In some embodiments, the drain conduit may be connected in
fluid flow communication with the humidification unit via a
venturi.
[0061] In some embodiments, the location upstream of the water mist
production member may be positioned below the water impermeable
container whereby water drains from the water impermeable container
through the drain conduit under the influence of gravity.
[0062] In some embodiments, the drain conduit may be connected in
fluid flow communication with a water reservoir of the
humidification unit.
[0063] In accordance with a third aspect of this disclosure, which
may be used alone or in combination with any other aspect, there is
provided an air inlet for a humidification unit for a fan coil
assembly which uses the blower of the fan coil to provide the air
flow across a source of moisture, such as an ultrasonic
humidification member. The inlet may be in the form of a scoop or
channel that extends into an air flow path, preferably upstream of
a heating unit, and guides the air flow into a chamber and across a
source of moisture.
[0064] In accordance with this third aspect, there is provided a
fan coil apparatus comprising a humidification unit, the
humidification unit comprising: [0065] (a) a water mist production
member including a chamber wherein, in operation, a water mist
produced by the water mist production member is present in the
chamber; and, [0066] (b) an air flow path extending from an air
inlet to an air outlet and passing through the chamber, wherein air
passing through the air flow path draws water mist from the chamber
and out the air outlet, wherein the air inlet comprises a scoop
positioned in a first portion of an air flow path of the fan coil
apparatus.
[0067] In some embodiments, the humidification unit may comprise an
ultrasonic humidifier such as a nebulizer.
[0068] In some embodiments, the ultrasonic humidifier may be
provided in a water tank and the air outlet is provided in an upper
portion of the water tank.
[0069] In some embodiments, the fan coil apparatus may further
comprise a water reservoir upstream of the water tank.
[0070] In some embodiments, the fan coil apparatus may further
comprise a water filter upstream of the water reservoir.
[0071] In some embodiments, the water filter may be selectively
connectable in flow communication with a supply of water by an
openable valve, wherein the valve is openable when a water level in
the water reservoir is low.
[0072] In some embodiments, the water reservoir may be selectively
connectable in flow communication with a supply of water by an
openable valve, wherein the valve is openable when a water level in
the water reservoir is low.
[0073] In some embodiments, the water reservoir may comprise a
float switch that is operatively connectable to the openable
valve.
[0074] In some embodiments, the water reservoir may be in flow
communication with the water tank by gravity feed.
[0075] In some embodiments, the air outlet may comprise a plurality
of outlets provided in a water mist distribution tube.
[0076] In some embodiments, the water mist distribution tube may be
provided in a second portion of air flow path of the fan coil
apparatus downstream of a location of the scoop, the second portion
of air flow path of the fan coil apparatus may have a length in a
direction transverse to a direction of air flow therethrough and
the water mist distribution tube may extend at least substantially
along the length of the second portion of the air flow path.
[0077] In some embodiments, the water mist distribution tube may
extend generally transverse to the direction of air flow through
the second portion.
[0078] In accordance with this third aspect, there is also provided
a humidification unit for a fan coil apparatus, the humidification
unit comprising: [0079] (a) a water mist production member
including a chamber wherein, in operation, a water mist produced by
the water mist production member is present in the chamber; and,
[0080] (b) an air flow path extending from an air inlet to an air
outlet and passing through the chamber, wherein air passing through
the air flow path draws water mist from the chamber and out the air
outlet, wherein the air inlet comprises a scoop positionable in a
first portion of an air flow path of a fan coil apparatus.
[0081] In some embodiments, the humidification unit may comprise an
ultrasonic humidifier such as a nebulizer.
[0082] In some embodiments, the ultrasonic humidifier may be
provided in a water tank and the air outlet is provided in an upper
portion of the water tank.
[0083] In some embodiments, the fan coil apparatus may further
comprise a water reservoir upstream of the water tank.
[0084] In some embodiments, the fan coil apparatus may further
comprise a water filter upstream of the water reservoir.
[0085] In some embodiments, the water filter may be selectively
connectable in flow communication with a supply of water by an
openable valve, wherein the valve is openable when a water level in
the water reservoir is low.
[0086] In some embodiments, the water reservoir may be selectively
connectable in flow communication with a supply of water by an
openable valve, wherein the valve is openable when a water level in
the water reservoir is low.
[0087] In some embodiments, the water reservoir may comprise a
float switch that is operatively connectable to the openable
valve.
[0088] In some embodiments, the water reservoir may be in flow
communication with the water tank by gravity feed.
[0089] In accordance with a fourth aspect of this disclosure, which
may be used alone or in combination with any other aspect, there is
provided a safety control system which shuts of water flow to the
humidification unit of a fan coil assembly and optionally, water
flow to the fan coil assembly. The safety control system monitors
the water level in one or more leak reservoirs and may shut off an
inlet valve if a high water level condition occurs.
[0090] In accordance with this fourth aspect, there is provided a
fan coil comprising a humidification unit, the humidification unit
comprising: [0091] (a) an inner container comprising a water supply
for a water mist production member and an inner container water
level detector, the inner container water level detector sensing a
high water level in the inner container when a water level in the
inner container is at a high water level position; [0092] (b) an
outer container comprising a reservoir and an outer container water
level detector, wherein the outer container is positioned to
receive water which leaks from the inner container, the outer
container water level detector sensing a high water level in the
outer container when a water level in the outer container is at a
high water level position; [0093] (c) a water supply conduit
connectable to a source of water and in fluid flow communication
with the inner container; and, [0094] (d) a shut off valve provided
in the water supply conduit, the shut off valve operable between an
open position and a closed position, wherein the shut off valve is
in the closed position when the inner container water level
detector senses a high water level in the inner container or when
the outer container water level detector senses a high water level
in the outer container.
[0095] In some embodiments, the inner container may be positioned
to overlie at least a portion of an open interior of the outer
container.
[0096] In some embodiments, the outer container may have an inner
chamber and the inner container may be at least partially nested in
the outer container.
[0097] In some embodiments, the inner container water level
detector may also sense a low water level in the inner container
when a water level in the inner container is at a low water level
position and the shut off valve may be in the closed position when
the outer container water level detector senses a high water level
in the outer container and when the inner container water level
detector senses a low water level in the inner container.
[0098] In some embodiments, the outer container water level
detector may also sense a low water level in the outer container
when a water level in the outer container is at a low water level
position and the shut off valve may be in the closed position when
the inner container water level detector senses a high water level
in the inner container and when the outer container water level
detector senses a low water level in the outer container.
[0099] In some embodiments, the shut off valve may comprise a
solenoid.
[0100] In some embodiments, at least one of the water level
detectors may comprise a float switch.
[0101] In some embodiments, the inner container water level
detector and the outer container water level detector may each
comprise a float switch.
[0102] In some embodiments, the outer container may further
comprise a drain.
[0103] In some embodiments, the water supply of the inner container
may comprise a water mist production member chamber and a water
reservoir chamber wherein the inner container water level detector
is provided in the water mist production member chamber.
[0104] In some embodiments, the fan coil may further comprise a
separating wall provided between the water mist production member
chamber and the water reservoir chamber and the water reservoir
chamber may be in flow communication with the water mist production
member chamber.
[0105] In some embodiments, a fluid flow port may be provided in a
lower portion of the separating wall.
[0106] In some embodiments, the fluid flow port may be positioned
above an upper end of the water mist production member.
[0107] In accordance with this fourth aspect, there is also
provided a humidification unit for a fan coil, the humidification
unit comprising: [0108] (a) an inner container comprising a water
supply for a water mist production member and an inner container
water level detector, the inner container water level detector
sensing a high water level in the inner container when a water
level in the inner container is at a high water level position;
[0109] (b) an outer container comprising a reservoir and an outer
container water level detector, wherein the outer container is
positioned to receive water which leaks from the inner container,
the outer container water level detector sensing a high water level
in the outer container when a water level in the outer container is
at a high water level position; [0110] (c) a water supply conduit
connectable to a source of water and in fluid flow communication
with the inner container; and, [0111] (d) a shut off valve provided
in the water supply conduit, the shut off valve operable between an
open position and a closed position, wherein the shut off valve is
in the closed position when the inner container water level
detector senses a high water level in the inner container or when
the outer container water level detector senses a high water level
in the outer container.
[0112] In some embodiments, the inner container may be positioned
to overlie at least a portion of an open interior of the outer
container.
[0113] In some embodiments, the inner container water level
detector may also sense a low water level in the inner container
when a water level in the inner container is at a low water level
position and the shut off valve may be in the closed position when
the outer container water level detector senses a high water level
in the outer container and when the inner container water level
detector senses a low water level in the inner container.
[0114] In some embodiments, the outer container water level
detector may also sense a low water level in the outer container
when a water level in the outer container is at a low water level
position and the shut off valve may be in the closed position when
the inner container water level detector senses a high water level
in the inner container and when the outer container water level
detector senses a low water level in the outer container.
[0115] In some embodiments, at least one of the water level
detectors may comprise a float switch.
[0116] In some embodiments, the water supply of the inner container
may comprise a water mist production member chamber and a water
reservoir chamber wherein the inner container water level detector
is provided in the water mist production member chamber.
[0117] In some embodiments, the humidification unit may further
comprise a separating wall provided between the water mist
production member chamber and the water reservoir chamber and the
water reservoir chamber is in flow communication with the water
mist production member chamber.
[0118] In some embodiments, a fluid flow port may be provided in a
lower portion of the separating wall.
[0119] In some embodiments, the fluid flow port may be positioned
above an upper end of the water mist production member.
[0120] In accordance with a fifth aspect of this disclosure, which
may be used alone or in combination with any other aspect, there is
provided a leak reservoir system for a water filter for a
humidifier. In accordance with this embodiment, a water recovery
system comprises a member or members which collect some or
substantially all or all of the water that may leak from a water
filter assembly of a fan coil assembly.
[0121] In accordance with this fifth aspect, there is provided a
fan coil comprising a humidification unit, the humidification unit
comprising: [0122] (a) a water filter comprising an inlet
connectable to a source of water and a filtered water outlet in
flow communication with a downstream portion of the humidification
unit; [0123] (b) a leak container comprising a reservoir and a leak
container water level detector, wherein the leak container is
positioned to receive water which leaks from the water filter or
flow conduits leading to or from the water filter, the leak
container water level detector sensing a high water level in the
leak container when a water level in the leak container is at a
high water level position; and, [0124] (c) a shut off valve
provided in the water supply conduit, the shut off valve operable
between an open position and a closed position, wherein the shut
off valve is in the closed position when the leak container water
level detector senses a high water level in the leak container.
[0125] In some embodiments, the water filter may be positioned to
overlie at least a portion of an open interior of the leak
container.
[0126] In some embodiments, the leak container may have an inner
chamber and the water filter may be at least partially nested in
the outer container.
[0127] In some embodiments, the leak container water level detector
may also sense a low water level in the leak container when a water
level in the leak container is at a low water level position and
the shut off valve may be in the open position when the leak
container water level detector senses a low water level in the
inner container.
[0128] In some embodiments, the shut off valve may comprise a
solenoid.
[0129] In some embodiments, the water level detector may comprise a
float switch.
[0130] In some embodiments, the leak container may further comprise
a drain.
[0131] In some embodiments, the humidification unit may further
comprise: [0132] (a) an inner container comprising a water supply
for a water mist production member and an inner container water
level detector, the inner container water level detector sensing a
high water level in the inner container when a water level in the
inner container is at a high water level position, wherein the
water supply comprises the downstream portion of the humidification
unit; and, [0133] (b) an outer container comprising a reservoir and
an outer container water level detector, wherein the outer
container is positioned to receive water which leaks from the inner
container, the outer container water level detector sensing a high
water level in the outer container when a water level in the outer
container is at a high water level position; wherein the shut off
valve is also in the closed position when the inner container water
level detector senses a high water level in the inner container or
when the outer container water level detector senses a high water
level in the outer container.
[0134] In some embodiments: [0135] (a) the inner container water
level detector may also sense a low water level in the inner
container when a water level in the inner container is at a low
water level position; [0136] (b) the leak container water level
detector may also sense a low water level in the leak container
when a water level in the leak container is at a low water level
position; and, [0137] (c) the shut off valve may be in the closed
position when the outer container water level detector senses a
high water level in the outer container and when the inner
container water level detector senses a low water level in the
inner container and when the leak container water level detector
senses a low water level in the leak container.
[0138] In some embodiments: [0139] (a) the outer container water
level detector may also sense a low water level in the outer
container when a water level in the outer container is at a low
water level position; [0140] (b) the leak container water level
detector may also sense a low water level in the leak container
when a water level in the leak container is at a low water level
position; and, [0141] (c) the shut off valve may be in the closed
position when the inner container water level detector senses a
high water level in the inner container and when the outer
container water level detector senses a low water level in the
outer container and when the leak container water level detector
senses a low water level in the leak container.
[0142] In accordance with this fifth aspect, there may also be
provided a humidification unit for a fan coil, the humidification
unit comprising: [0143] (a) a water filter comprising an inlet
connectable to a source of water and a filtered water outlet in
flow communication with a downstream portion of the humidification
unit; [0144] (b) a leak container comprising a reservoir and a leak
container water level detector, wherein the leak container is
positioned to receive water which leaks from the water filter or
flow conduits leading to or from the water filter, the leak
container water level detector senses a high water level in the
leak container when a water level in the leak container is at a
high water level position; and, [0145] (c) a shut off valve
provided in the water supply conduit, the shut off valve operable
between an open position and a closed position, wherein the shut
off valve is in the closed position when the leak container water
level detector senses a high water level in the inner
container.
[0146] In some embodiments, the water filter may be positioned to
overlie at least a portion of an open interior of the leak
container.
[0147] In some embodiments, the leak container may have an inner
chamber and the water filter is at least partially nested in the
outer container.
[0148] In some embodiments, the leak container water level detector
may also sense a low water level in the leak container when a water
level in the leak container is at a low water level position and
the shut off valve may be in the open position when the leak
container water level detector senses a low water level in the
inner container.
[0149] In some embodiments, the shut off valve may comprise a
solenoid.
[0150] In some embodiments, the water level detector may comprise a
float switch.
[0151] In some embodiments, the leak container may further comprise
a drain.
[0152] In some embodiments, the humidification unit may further
comprise: [0153] (a) an inner container comprising a water supply
for a water mist production member and an inner container water
level detector, the inner container water level detector senses a
high water level in the inner container when a water level in the
inner container is at a high water level position, wherein the
water supply comprises the downstream portion of the humidification
unit; and, [0154] (b) an outer container comprising a reservoir and
an outer container water level detector, wherein the outer
container is positioned to receive water which leaks from the inner
container, the outer container water level detector senses a high
water level in the outer container when a water level in the outer
container is at a high water level position; wherein the shut off
valve is also in the closed position when the inner container water
level detector senses a high water level in the inner container or
when the outer container water level detector senses a high water
level in the outer container.
[0155] In some embodiments: [0156] (a) the inner container water
level detector may also sense a low water level in the inner
container when a water level in the inner container is at a low
water level position; [0157] (b) the leak container water level
detector may also sense a low water level in the leak container
when a water level in the leak container is at a low water level
position; and, [0158] (c) the shut off valve may be in the closed
position when the outer container water level detector senses a
high water level in the outer container and when the inner
container water level detector senses a low water level in the
inner container and when the leak container water level detector
senses a low water level in the leak container.
[0159] In some embodiments: [0160] (a) the outer container water
level detector may also sense a low water level in the outer
container when a water level in the outer container is at a low
water level position; [0161] (b) the leak container water level
detector may also sense a low water level in the leak container
when a water level in the leak container is at a low water level
position; and, [0162] (c) the shut off valve may be in the closed
position when the inner container water level detector senses a
high water level in the inner container and when the outer
container water level detector senses a low water level in the
outer container and when the leak container water level detector
senses a low water level in the leak container.
[0163] In accordance with a sixth aspect of this disclosure, which
may be used alone or in combination with any other aspect, there is
provided a humidifier treatment system to at least partially
sterilize and preferably substantially sterilize or sterilize part
or all of the humidification system.
[0164] In accordance with this sixth aspect, there is provided a
fan coil apparatus comprising: [0165] (a) an air flow path
extending from a heating zone to a fan coil air outlet and
including a humidification section; [0166] (b) a humidification
unit comprising a humidification unit water droplet outlet and an
air permeable water retaining member, wherein the air permeable
water retaining member and the humidification unit water droplet
outlet are provided in the humidification section and the air
permeable water retaining member is positioned downstream from the
humidification unit water droplet outlet; and, [0167] (c) a
treatment applicator providing a disinfecting agent upstream from
an air outlet of the humidification section.
[0168] In some embodiments, the disinfecting agent may comprise one
or more of ozone, UV light and hydrogen peroxide.
[0169] In some embodiments, the disinfecting agent may comprise
ozone and the fan coil further may comprise an ozone destructor
material positioned upstream from an air outlet of the fan
coil.
[0170] In some embodiments, the humidification unit may be located
in an air exit plenum of the fan coil.
[0171] In some embodiments, the disinfecting agent may be provided
in the air exit plenum.
[0172] In some embodiments, the disinfecting agent may comprise one
or more of ozone and hydrogen peroxide and the disinfecting agent
may be introduced into the air exit plenum.
[0173] In some embodiments, the disinfecting agent may comprise
ozone and the fan coil may further comprise an ozone destructor
material positioned downstream from the air permeable water
retaining member.
[0174] In some embodiments, the disinfecting agent may comprise a
UV light source and the UV light source may be located in the air
exit plenum.
[0175] In accordance with this sixth embodiment, there is also
provided a humidification unit for a fan coil apparatus, the
humidification unit comprising: [0176] (a) a humidification unit
water droplet outlet; [0177] (b) an air permeable water retaining
member positioned downstream from the humidification unit water
droplet outlet; and, [0178] (c) a treatment applicator providing a
disinfecting agent upstream from the air permeable water retaining
member.
[0179] In some embodiments, the disinfecting agent may comprise one
or more of ozone, UV light and hydrogen peroxide.
[0180] In some embodiments, the disinfecting agent may comprise
ozone and the humidification unit may further comprise an ozone
destructor material positioned upstream from an air outlet of the
fan coil.
[0181] In some embodiments, the disinfecting agent may comprise one
or more of ozone and hydrogen peroxide and the disinfecting agent
may be introduced into the humidification unit upstream from the
air permeable water retaining member.
[0182] In some embodiments, the disinfecting agent may comprise
ozone and the humidification unit may further comprise an ozone
destructor material positioned downstream from the air permeable
water retaining member.
[0183] 14. In some embodiments, the disinfecting agent may comprise
a UV light source and the UV light source may be located between
the humidification unit water droplet outlet and the air permeable
water retaining member.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0184] The drawings included herewith are for illustrating various
examples of articles, methods, and apparatuses of the teaching of
the present specification and are not intended to limit the scope
of what is taught in any way.
[0185] FIG. 1 is a front perspective view of a fan coil apparatus
in accordance with an embodiment;
[0186] FIG. 2 is a rear perspective view of the fan coil apparatus
of FIG. 1;
[0187] FIG. 3 is a front perspective view of the fan coil apparatus
of FIG. 1 with its front face removed;
[0188] FIG. 4 is a side perspective view of the fan coil apparatus
of FIG. 1 with its front face removed;
[0189] FIG. 5 is a cross-sectional view taken along line 5-5 in
FIG. 1;
[0190] FIG. 6 is a front elevation view of the fan coil apparatus
of FIG. 1 with its front face removed;
[0191] FIG. 7 is a perspective view of a misting portion of a
humidification unit;
[0192] FIG. 8 is an enlargement of region 8 in FIG. 7;
[0193] FIG. 9 is a perspective view of the misting portion
sectioned along line 9-9 in FIG. 8;
[0194] FIG. 10 is a perspective view of the missing portion
sectioned along line 10-10 in FIG. 8;
[0195] FIG. 11 is a schematic drawing of a fan coil apparatus in
accordance with another embodiment;
[0196] FIG. 12 is a schematic drawing of a fan coil apparatus in
accordance with another embodiment;
[0197] FIG. 13 is a schematic drawing of a fan coil apparatus in
accordance with another embodiment;
[0198] FIG. 14 is a schematic drawing of a fan coil apparatus in
accordance with another embodiment;
[0199] FIG. 15 is a schematic drawing of a fan coil apparatus in
accordance with another embodiment;
[0200] FIG. 16 is a schematic drawing of a fan coil apparatus in
accordance with another embodiment;
[0201] FIG. 17 is a front elevation view of a fan coil apparatus
with its front face removed in accordance with another
embodiment;
[0202] FIG. 18 is a front elevation view of a fan coil apparatus
with its front face removed in accordance with another
embodiment;
[0203] FIG. 19 is an enlarged view of region 19-19 in FIG. 5;
[0204] FIG. 20 is an exploded view of a filter portion of the
humidification unit;
[0205] FIG. 21 is a cross-sectional view taken along line 5-5 in
FIG. 1 in accordance with another embodiment;
[0206] FIG. 22 is a schematic drawing of a fan coil apparatus in
accordance with another embodiment;
[0207] FIG. 23 is a cross-sectional view taken along line 23-23 in
FIG. 8 with a leak water level detector sensing a lower water
level;
[0208] FIG. 24 is a cross-sectional view taken along line 23-23 in
FIG. 8 with the leak water level detector sensing a high water
level;
[0209] FIG. 25 is an exploded view of the misting portion;
[0210] FIG. 26 is another exploded view of the misting portion;
[0211] FIG. 27 is a cross-sectional view taken along line 27-27 in
FIG. 1;
[0212] FIG. 28 is a perspective view of the fan coil apparatus of
FIG. 1 with part of its housing removed;
[0213] FIG. 29 is a perspective view of the fan coil apparatus of
FIG. 1, with an air permeable water retaining member in an exploded
position, and an air heating device removed;
[0214] FIG. 30 is a cross-sectional view taken along line 27-27 in
FIG. 1 in accordance with another embodiment; and,
[0215] FIG. 31 is a cross-sectional view taken along line 27-27 in
FIG. 1 in accordance with another embodiment.
[0216] FIG. 32 is a schematic drawing of a power circuit in
accordance with another embodiment.
DESCRIPTION OF VARIOUS EMBODIMENTS
[0217] Numerous embodiments are described in this application, and
are presented for illustrative purposes only. The described
embodiments are not intended to be limiting in any sense. The
invention is widely applicable to numerous embodiments, as is
readily apparent from the disclosure herein. Those skilled in the
art will recognize that the present invention may be practiced with
modification and alteration without departing from the teachings
disclosed herein. Although particular features of the present
invention may be described with reference to one or more particular
embodiments or figures, it should be understood that such features
are not limited to usage in the one or more particular embodiments
or figures with reference to which they are described.
[0218] The terms "an embodiment," "embodiment," "embodiments," "the
embodiment," "the embodiments," "one or more embodiments," "some
embodiments," and "one embodiment" mean "one or more (but not all)
embodiments of the present invention(s)," unless expressly
specified otherwise.
[0219] The terms "including," "comprising" and variations thereof
mean "including but not limited to," unless expressly specified
otherwise. A listing of items does not imply that any or all of the
items are mutually exclusive, unless expressly specified otherwise.
The terms "a," "an" and "the" mean "one or more," unless expressly
specified otherwise.
[0220] As used herein and in the claims, two or more parts are said
to be "coupled", "connected", "attached", or "fastened" where the
parts are joined or operate together either directly or indirectly
(i.e., through one or more intermediate parts), so long as a link
occurs. As used herein and in the claims, two or more parts are
said to be "directly coupled", "directly connected", "directly
attached", or "directly fastened" where the parts are connected in
physical contact with each other. As used herein, two or more parts
are said to be "rigidly coupled", "rigidly connected", "rigidly
attached", or "rigidly fastened" where the parts are coupled so as
to move as one while maintaining a constant orientation relative to
each other. None of the terms "coupled", "connected", "attached",
and "fastened" distinguish the manner in which two or more parts
are joined together.
[0221] As used herein and in the claims, a first element is said to
be "received" in a second element where at least a portion of the
first element is received in the second element unless specifically
stated otherwise.
Structure of a Fan Coil Apparatus
[0222] The following is a general description of a fan coil having
a humidification unit and other features set out herein.
[0223] FIGS. 1 and 2 show a fan coil apparatus 100, in accordance
with an embodiment. In the illustrated example, fan coil apparatus
100 includes a housing 104 including a front face 108 defining an
air inlet 112 and an air outlet 116. The fan coil apparatus 100 is
operable to receive air from air inlet 112, heat or cool the air
introduced from inlet 112 and, as selected, humidify the air, and
discharge the treated air through air outlet 116 into a room.
[0224] The example shown includes a housing 104 that is
substantially cuboid (i.e. box-shaped). An advantage of this design
is that it provides an efficient and convenient form factor for
applications where the fan coil apparatus 100 is recessed into a
flat wall. However, in alternative embodiments, fan coil housing
104 can have any size and shape best suited for the intended
application.
[0225] In the example shown, the fan coil inlet and outlet 112 and
116 are formed in the front face 108 of the fan coil housing 104.
This design provides an efficient self-contained apparatus 100 that
can be easily accommodated into a room design. However, in
alternative embodiments, the fan coil inlet 112, the fan coil
outlet 116, or both may be located remotely from the fan coil
housing 104. For example, the fan coil outlet 116 may be fluidly
connected to the fan coil housing 104 by one or more airflow
conduits to allow the fan coil apparatus 100 to service one or more
rooms remote from the fan coil apparatus 100 (e.g., via ducting
built into a wall or ceiling of a building). In some embodiments,
fan coil apparatus 100 may include a plurality of fan coil air
inlets 112, a plurality of fan coil air outlets 116, or a plurality
of fan coil air inlets 112 and a plurality of fan coil air outlets
116. For example, fan coil apparatus 100 may include a plurality of
fan coil air outlets 116 directed to different rooms. This allows
one fan coil apparatus 100 to service several rooms.
[0226] Still referring to FIGS. 1 and 2, an air regulating device
120 is shown connected to fan coil apparatus 100. The air
regulating device 120 may operate as a thermostat and/or a
hygrostat, capable of sensing air temperature and/or air humidity,
and signaling the fan coil apparatus 100 to generate heated, cooled
and/or humidified air in order to maintain the room air at a set
temperature and/or humidity. For example, the air regulating device
120 may be programmed to maintain the room air at 21.degree. C. and
40% relative humidity for comfortable human occupancy. Air
regulating device 120 can be any thermostat and/or hygrostat device
known in the art. In the illustrated embodiment, air regulating
device 120 includes inputs 124 for user interaction (e.g. buttons
to enter a set air temperature and relative humidity), and an
optional display 128 (e.g. to display the current air temperature
and relative humidity).
[0227] Reference is now made to FIGS. 3-4 which shows fan coil
apparatus 100 with front face 108 (FIG. 1) removed so that some of
the internal components are visible. It will be appreciated that
the fan coil may be of any design known in the art and may use any
flow path, and any heating and air conditioning units known in the
heating and cooling arts. As shown, fan coil apparatus 100 includes
an air blower 132 and an air flow path 136 which extends from air
blower outlet 140 to fan coil air outlet 116. In the illustrated
example, the air flow path 136 includes a heating zone 148 between
an upstream first portion 144 of fan coil air flow path 136, and a
downstream second portion 152 of fan coil air flow path 136. The
second portion 152 of the fan coil air flow path 136 may include an
air exit plenum 156 positioned upstream of fan coil air outlet
116.
[0228] Heating zone 148 can include any air heating device 160
capable of heating the air moving downstream across the heating
zone 148. For example, the air heating device 156 can include a
heat exchanger as shown, or resistive heating elements, a natural
gas burner or the like. In some embodiments, the air heating device
160 includes a heat recovery ventilator (HRV) or an energy recovery
ventilator (ERV) that receives heat, or heat and humidity, from
exhausted room air for use, e.g., in treating fresh air introduced
into the unit from the outside.
[0229] Still referring to FIGS. 3 and 4, fan coil apparatus 100 is
shown including a humidification unit 164 for humidify air in the
fan coil air flow path 136 so that humidified air is discharged
from fan coil air outlet 116. When air is heated in heating zone
148, the relative humidity of the air may decrease. The humidity
added by humidification unit 164 can help to maintain or increase
the relative humidity of the air after heating, such as to attain
or maintain a set humidity programmed into air regulating device
120.
Structure of a Humidification Unit
[0230] The following is a general description of a humidification
unit that may be used in any fan coil apparatus. The following
description contains various features which may be used
individually or in any combination or sub-combination.
[0231] As exemplified in FIG. 5, humidification unit 164 includes a
misting portion 168, and an optional controller 172. The misting
portion 168 generates a water mist (e.g. by evaporating or
atomizing water), which is exposed to the air flow path 136 in
order to humidify the air. The controller 172 directs the
activation of misting portion 168. In some embodiments, controller
172 activates misting portion 168 in response to signals from air
regulating device 120. For example, controller 172 may activate
misting portion 168 in response to signals from air regulating
device 120 instructing that humidity is required (e.g. to attain or
maintain the set air humidity programmed into air regulating device
120). In some embodiments, controller 172 may determine not to
activate misting portion 168 (e.g. determine to keep misting
portion 168 deactivated) unless heating device 160 (FIG. 3) has
been activated. For example, controller 172 may determine not to
activate misting portion 168 unless signals from air regulating
device 120 instruct that both humidity and heat is required. An
advantage of this design is that water mist is not generated unless
the air flow is to be heated. Heating the air flow may reduce its
relative humidity and thereby allow the air flow to better absorb
the water mist. This can reduce accumulation of water (e.g.,
agglomerated water droplets in the water mist) inside the fan coil
apparatus 100. In alternative embodiments, controller 172 may
determine to activate misting portion 168 regardless of whether
heating device 160 (FIG. 3) is to be activated as well (e.g., if
the blower is operating and a sensor detects that the humidity
level is below a desired set point).
[0232] Controller 172 regulates the activation of misting portion
168 by controlling the supply of water and/or power to misting
portion 168. In the illustrated embodiment, misting portion 168
receives water from a water line 176. Misting portion water line
176 is fluidly coupled to a water supply 180, such as a municipal
water line (e.g., a water line in an apartment or condominium) or a
reservoir of water (e.g. water tank) external to fan coil apparatus
100. A shut-off valve 184 is positioned in the water flow path
upstream of misting portion 168 (e.g. on water line 176, water
supply 180, or between water supply 180 and water line 176). The
shut-off valve 184 has an open position in which water is allowed
to flow past shut-off valve 184 to supply misting portion 168 with
water, and a closed position in which shut-off valve 184 prevents
the flow of water to misting portion 168. Controller 172 may be
communicatively coupled with shut-off valve 184 to direct the
position of shut-off valve 184. This allows controller 172 to
regulate the supply of water to misting portion 168. Misting
portion 168 may run out of water and become unable to generate
water mist if the supply of water is stopped.
[0233] Shutoff valve 184 can be any valve capable of preventing the
flow of water to misting portion 168 in response to electrical or
mechanical direction from controller 172. For example, shut-off
valve 184 may be an electrical valve (e.g. a solenoid valve), and
controller 172 may be communicatively coupled to shut-off valve 184
by electrical line 188, whereby controller 172 can signal shut-off
valve 184 to move to the open or closed position. It will be
appreciated that any valve may be used.
[0234] Still referring to FIG. 5, controller 172 may regulate the
supply of power to misting portion 168 to control the activation of
misting portion 168. An advantage of this design is that controller
172 can power off misting portion 168 to immediately stop the
generation of water mist, even before misting portion 168 runs out
of water. Further, shutting off misting portion 168 may prevent
damage that may be caused by misting portion 168 operating without
any water present. In the illustrated example, misting portion 168
receives electrical power from an electrical line 192. Misting
portion electrical line 192 is electrically coupled to a power
supply 196, such as a municipal electrical grid (e.g., an
electrical outlet or circuit breaker in an apartment or
condominium), a power generator, or a power storage device (e.g.
battery pack). Controller 172 may be positioned in a circuit
between misting portion electrical line 192 and power supply 196 to
regulate the supply of power from power supply 196 to misting
portion 168. Accordingly, controller 172 may prevent misting
portion 168 from receiving power from power supply 196 to
deactivate misting portion 168, and allow misting portion 168 to
receive power from power supply 196 to activate misting portion
168.
[0235] Alternatively, or in addition to controlling misting portion
168 by regulating the supply of power and/or water to misting
portion 168, controller 172 may send control signals to misting
portion 168 instructing misting portion 168 to activate or
deactivate. For example, misting portion 168 may be continuously
powered and include logic to receive and act upon control signals
to start and stop water mist generation.
[0236] In some embodiments, controller 172 regulates not only the
activation of misting portion 168 but also the rate of water mist
generation by misting portion 168. An advantage of this design is
that it allows the rate of water mist generation to be tuned to
operate more continuously (and energy efficiently) while
maintaining a set air humidity. For example, controller 172 may
reduce (but not halt) the flow of water or power to misting portion
168 to slow (but not necessarily stop) the rate of water mist
generation. Similarly, controller 172 may send control signals to
misting portion 168 instructing misting portion 168 to slow (but
not necessarily halt) the rate of water mist generation. Misting
portion 168 may include logic to receive and act upon such control
signals to vary the rate of water mist generation.
[0237] Still referring to FIG. 5, humidification unit 164 may
optionally include a filter portion 204. Filter portion 204 may be
positioned upstream of misting portion 168 to filter water supplied
to misting portion 168 for impurities such as contaminants and
minerals, which can accumulate in the misting portion 168 and
compromise the operation of misting unit 168 and/or the air quality
discharged from fan coil apparatus 100 if dispersed into the
generated water mist. In the illustrated example, filter portion
204 is positioned in the water flow path between water supply 180
and misting portion 168. Water delivered from water supply 180
flows through filter portion 204 before being received by misting
portion 168.
[0238] FIGS. 6-8 exemplify a misting portion 168 including an air
inlet 208, a water inlet 212, and an air outlet 216. Misting
portion air inlet 208 receives air moving downstream in the fan
coil air flow path 136. Misting portion 168 generates water mist
from water received through misting portion water inlet 212. The
generated water mist mixes with air received through misting
portion air inlet 208, and then the air and water mist mixture
discharges through misting portion air outlet 216 back into the fan
coil air flow path 136 to form humidified air that exits through
fan coil air outlet 116 into the room.
Production of Air Droplets
[0239] The following is a description of an apparatus for producing
droplets of air that may be used by itself or in combination with
one or more other features disclosed herein including one or more
of an air scoop, a misting portion water impermeable container,
mist distributor, a filter portion, a leak detection control
system, an air permeable water retaining member and a treatment
applicator.
[0240] In accordance with this embodiment, a water mist production
member 232, may be used to produce a water mist (e.g., fine
droplets of water) which may be entrained in an air flow. Any water
mist production member 232 suitable for generating water mist may
be used. In the illustrated embodiment, water mist production
member 232 is an ultrasonic device such as a nebulizer 284.
Ultrasonic humidifier uses a ceramic diaphragm vibrating at an
ultrasonic frequency to create water droplets which, when entrained
in an air stream, may form a cool fog. The ultrasonic frequency
produces an extremely fine mist of water droplets, e.g., about one
micron in diameter, that may be quickly evaporated into an air
flow. In alternative embodiments, water mist production member 232
may be an evaporator that includes a water absorptive wick exposed
to air flow through the misting portion air flow path 236, or a
vaporizer that boils the water to generate steam.
[0241] It will be appreciated that, in other embodiments, any
apparatus which produces water droplets may be used and, in some
embodiments, it will be appreciated that any humidification unit
may be used.
[0242] As exemplified in FIGS. 9-10, misting portion 168 includes a
chamber 220 containing nebulizer 284. Chamber 220 may be of any
design which houses a nebulizer 284 or other water mist production
member 232 and which provides an air flow path for water droplets
to be entrained in an air flow.
[0243] As exemplified, chamber 220 includes a water tank 224
positioned below an air plenum 228. Nebulizer 284 may be positioned
anywhere inside water tank 224. Preferably, nebulizer 284 is
positioned at a lower end 288 of water tank 224 so that nebulizer
284 may remain in contact with water in water tank 224. Nebulizer
284 uses water in the water tank 224 and may cause the water mist
to rise into the air plenum 228. In other designs, the air may
travel over the water mist production member 232. The water tank
224 is in fluid communication with misting portion water inlet 212.
Water tank 224 is resupplied with water from misting portion water
inlet 212 as water mist production member 232 consumes water in
water tank 224 to generate water mist.
[0244] As shown, misting portion chamber 220 may include an upper
wall 240 opposite a lower wall 244, and a sidewall 248 extending
between the upper wall 240 and lower wall 244. In the illustrated
example, water tank 224 is bordered by chamber sidewall 248 and
chamber lower wall 244, and air plenum 228 is bordered by chamber
sidewall 248 and chamber upper wall 240.
[0245] Misting portion water inlet 212 may be positioned anywhere
that is in fluid communication with water tank 224. In the
illustrated embodiment, misting portion water inlet 212 is
positioned above and spaced apart from water tank 224 so that water
from water inlet 212 falls by gravity (and water pressure) into
water tank 224 below (e.g. across air plenum 228). An advantage of
this design is that the backpressure in misting portion water line
176 is constant, which makes the flow rate through misting portion
water line 176 easily predictable. In contrast, submerging misting
portion water inlet 212 in water tank 224 will result in a
backpressure in misting portion water line 176 that varies with the
water level in water tank 224. In the illustrated embodiment,
misting portion water inlet 212 is positioned in a wall of misting
portion chamber 220 that borders air plenum 228. For example,
misting portion water inlet 212 may be positioned in chamber upper
wall 240 as shown, or chamber sidewall 248.
[0246] In alternative embodiments, misting portion water inlet 212
is positioned within water tank 224. This can allow the water level
in water tank 224 to be determined by measuring the backpressure in
misting portion water line 176.
[0247] Misting portion 168 includes an air flow path 236 which
extends from misting portion air inlet 208 to misting portion air
outlet 216. An air plenum 228 may be positioned in the air flow
path 236 between the misting portion air inlet 208 and air outlet
216. This allows the air traveling across the air plenum 228 to
entrain or absorb the generated water mist before discharging
through the misting portion air outlet 216.
[0248] Returning to FIG. 6, misting portion 168 may be positioned
anywhere in the fan coil air flow path 136. In the illustrated
example, misting portion 168 includes an air inlet 208 positioned
in a first portion 144 of fan coil air flow path 136 that is
upstream of heating zone 148, and an air outlet 216 that discharges
the air and water mist mixture downstream of heating zone 148. An
advantage of discharging the air and water mist mixture downstream
of heating zone 148 is that the low relative humidity of the heated
air allows the water mist to be more efficiently absorbed. As a
result, less water mist generation may be required and less water
mist may accumulate in the fan coil which may result in rusting of
the apparatus or leaking of water from the fan coil apparatus. In
turn, the misting portion 168 may consume less power by activating
less frequently, activating at a lower power setting, or by
including a less powerful water mist production member. Also, less
water may be consumed by misting portion 168 because less water is
lost. An advantage of positioning misting portion air inlet 208
upstream of heating zone 148 is that cooler air moves through
misting portion 168, which makes microorganisms, mold, and the like
less likely to cultivate inside misting portion 168.
Air Scoop
[0249] The following is a description of an air scoop that may be
used by itself or in combination with one or more other features
disclosed herein including one or more of a misting portion water
impermeable container, mist distributor, a filter portion, a leak
detection control system, an air permeable water retaining member
and a treatment applicator.
[0250] Misting portion air inlet 208 may comprise, consist
essentially of or consist of an air scoop 252 which diverts air
from the fan coil air flow path 136 to misting portion air flow
path 236. An advantage of this design is that air flow through
misting portion 168 is driven by the fan coil air blower 132 (FIG.
3), avoiding the need for an additional air moving device to push
air through misting portion 168. A further advantage is that the
discharge of the air and water vapor mixture from misting portion
168 relies upon the activation of air blower 132 (FIG. 3). The air
and water vapor mixture will not discharge from misting portion 168
and stagnantly collect (and accumulate such as by agglomerating
into larger water droplets) in air exit plenum 156 (FIG. 3) if the
air blower 132 (FIG. 3) is deactivated.
[0251] As exemplified in FIG. 10, scoop 252 may include an inlet
end 256 that faces in an upstream direction 260 of the fan coil air
flow path 136. Scoop 252 may have any configuration suitable for
diverting air from fan coil air flow path 136 to misting portion
air flow path 236. It will be appreciated that scoop 252 may face
directly towards the air flow or it may be at an angle to the air
flow path. In the illustrated embodiment, scoop 252 is formed as a
hood that extends away from the rest of misting portion 168 in a
direction 264 transverse to the downstream direction 268. This
provides the scoop inlet end 256 with unobstructed exposure to the
air flow moving through fan coil air flow path 136. As shown, scoop
252 may have an upper wall 272 that slopes upwardly in the
downstream direction. The sloped upper wall 272 acts to redirect
the diverted air into the misting portion chamber 220. Preferably,
scoop 252 is configured without any 90 degree bends so as to reduce
back pressure through the misting portion.
[0252] Still referring to FIG. 10, in some embodiments, scoop 252
may further include an optional air flow limiter 276 that limits
the maximum air flow diverted by scoop 252 into misting portion air
flow path 236. Air flow limiter 276 prevents excess air velocity
through misting portion air flow path 236, which can result in
unwanted air turbulence and sloshing of the water in water tank
224, which can result in larger water droplets being entrained in
the air flow, which may not be absorbed by the air and may
therefore fall out and produce rust or a leak. Similarly, air flow
limiter 276 prevents high velocity discharge of the air and water
mist mixture at misting portion air outlet 216 against the
sidewalls of fan coil apparatus 100 (FIG. 3), which can result in
unwanted accumulation of water.
[0253] Air flow limiter 276 may have any configuration suitable for
limiting the maximum air flow (e.g. maximum air velocity of air
diverted) into scoop 252. Preferably, air flow limiter 276 acts
passively in response to the air flow impinging on scoop 252. An
advantage of this design is that it avoids the need for actuators
(e.g. motors), electrical cables, and control devices that may be
required by an active air flow limiter. In the illustrated example,
air flow limiter 276 comprises a flap that is pivotally (e.g.
hingedly) connected at one end to, e.g., the misting unit. Air flow
limiter 276 may be movable (e.g. pivotally rotatable) between an
open position (shown) and a closed position. In the open position
(shown), air flow limiter 276 allows air to enter scoop 252. In the
closed position, air flow limiter 276 may partially or completely
obstruct air from entering scoop 252. As exemplified, air flow
limiter 276 has an upstream face 280 oriented such that air flowing
air through fan coil air flow path 136 collides with upstream face
280. The air pressure against air flow limiter upstream face 280
may move the air flow limiter 276 into the closed position when the
downstream flow of air through fan coil air flow path 136 exceeds a
predetermined flow rate. Accordingly, the air flow limiter may be
designed such that it is fully open when air is travelling at a
design velocity through air flow path 136. As air travels at a
higher rate, the air flow limiter may partially or fully close
scoop 252 thereby limiting air flow into the misting unit.
[0254] It will be appreciated that, in some embodiments, air flow
limiter may be actuated based on, e.g., on an air flow velocity
detected by a sensor, and the sensor may send a signal to, e.g.,
controller 172, which actuals movement or the air flow limiter.
[0255] In other embodiments, it will be appreciated that misting
portion 168 may include a separate air mover (e.g. blower, not
shown). This allows the air flow through misting portion air flow
path 236 and fan coil air flow path 136 to be independently
controlled. In such an embodiment, a scoop 252 may not be used.
Misting Portion Water Impermeable Container
[0256] The following is a description of misting portion water
impermeable container that may be used by itself or in combination
with one or more other features disclosed herein including one or
more of an air scoop, mist distributor, a filter portion, a leak
detection control system, an air permeable water retaining member
and a treatment applicator.
[0257] In accordance with this this feature, a container is
positioned to capture water which may leak from tank 224.
Accordingly, as exemplified in FIG. 10, in some embodiments misting
portion 220 may include an inner container 292 and an outer
container 296. As shown, misting portion chamber 220 may be housed
in or defined by misting portion inner container 292, and misting
portion inner container 292 overlies (at least a portion of) an
open interior of misting portion outer container 296. An advantage
of this design is that misting portion outer container 296 may
collect any water that may leak from misting portion inner
container 292 (e.g. if a seal becomes broken). For example, misting
portion inner container 292 may be partially and, preferably,
substantially or fully nested inside misting portion outer
container 296 as shown.
[0258] As exemplified, misting portion outer container 296 may
include a drain 304 that provides an outlet for water collected in
misting portion outer container 296. An advantage of this design is
that water leaking from misting portion inner container 292 (e.g.
from water tank 224) may be redirected through drain 304 to, e.g. a
municipal drain, or recirculated back, e.g., into water tank 224.
This prevents the leak water from spilling into the fan coil
apparatus 100 and leaking into the fan coil's surroundings (e.g.
inside the wall of a room). In the illustrated example, a drain
conduit 308 is connected to outer container drain 304 for directing
drain water downstream.
[0259] As exemplified in FIG. 5 drain conduit 308 may convey drain
water toward a fan coil drain 312, which leads outside of fan coil
apparatus 100, such as to a municipal drain or outdoors.
Alternately, drain water may be recirculated back into misting
portion 168 in any manner. As exemplified in FIG. 11 drain conduit
308 conveys drain water to recirculate back into misting portion
168. An advantage of this design is that water consumption is
reduced by recycling the drain water instead of discarding the
drain water (e.g. to a municipal drain).
[0260] Preferably, drain water is recirculated without any
additional pumps. As exemplified in FIG. 11, drain conduit 308
directs drain water by gravity downwardly to a venturi device 316
positioned below (i.e. at a lower elevation than) outer container
drain 304. Venturi device 316 includes a venturi pipe 320 having a
water supply inlet 324, a drain water inlet 328, and an outlet 332.
Water supply inlet 324 is fluidly connected downstream of water
supply 180, drain water inlet 328 is fluidly connected downstream
of outer container drain conduit 308, and venture outlet 332 is
fluidly connected upstream of misting portion water inlet 212. In
use, the flow of supply water from water supply inlet 324 across
venturi pipe 320 to venturi outlet 332 causes a pressure drop which
draws in drain water from drain water inlet 328. As a result, a
mixture of water supply water and drain water discharges from
venturi 320 through venturi outlet 332 towards misting portion
water inlet 212.
[0261] In the example of FIG. 11, venturi device 316 is positioned
upstream of misting portion 168 and downstream of an optional
filter portion 204. FIG. 12 shows another example in which venturi
device 316 is positioned upstream of an optional filter portion 204
(and therefore upstream of misting portion 168 as well). An
advantage of this design is that the drain water may be filtered
before returning to misting portion 168.
[0262] Referring to FIGS. 13-14, in some embodiments venturi device
316 includes a filter 336 positioned upstream of venturi pipe drain
water inlet 328 (as shown in FIG. 13) or positioned downstream of
venturi pipe misting portion outlet 332 (as shown in FIG. 14), or
both. An advantage of this design is that the drain water is
filtered before return to misting portion 168. This may be
particularly advantageous where humidification unit 164 does not
have a filter portion 204 to route the drain water through to
filter the drain water.
Mist Distributor
[0263] The following is a description of mist distributor that may
be used by itself or in combination with one or more other features
disclosed herein including one or more of an air scoop, a misting
portion water impermeable container, a filter portion, a leak
detection control system, an air permeable water retaining member
and a treatment applicator.
[0264] In accordance with this feature a mist distributor 340 that
distributes the generated water mist into the air moving through
the fan coil air flow path 136 is provided, preferably at the air
outlet of the fan coil assembly (e.g., misting portion air outlet
216), which may extend part or all of the way across the air flow
path and optionally transverse or generally transverse to the air
flow direction.
[0265] Mist distributor 340 may have any configuration suitable for
dispersing the generated water mist into the fan coil air flow path
136. As exemplified in FIGS. 6 and 7, mist distributor 340
comprises a water mist distribution tube 344. As exemplified,
misting portion air outlet 216 may also include an air outlet
conduit 346 upstream of mist distributor 340 to allow water mist
distribution tube 344 to be remotely positioned in the air exit
plenum 156 downstream of the heating zone 148.
[0266] Water mist distribution tube 344 may be of various
configurations. As exemplified in FIG. 7, water mist distribution
tube 344 is a longitudinally extending tube having a length 348
extending from a first end 352 to a second end 356. The air and
water mist mixture may enter the water mist distribution tube 344
at either end, e.g., first end 352 as exemplified.
[0267] As exemplified, water mist distribution tube 344 may have a
plurality of outlets 360 distributed along its length 348 and
length may extend part or all the way transversely across the air
flow path. It will be appreciated that, in some embodiment, two or
more distribution tubes 344 may be provided, each of which may
extend part or all the way across the air flow path. Further,
distribution tube 344 may extend transverse or generally transverse
to the direction of air flow or at an angle to the direction of air
flow.
[0268] As exemplified, water mist distribution tube 344 extends
transversely to the air flow direction 364 through fan coil air
flow path 136 across water mist distribution tube 344 and may
extend part or all the way across the air flow path. For example,
as exemplified in FIG. 6, water mist distribution tube 344 may have
a transverse length 348 that extends at least substantially along
the transverse length 368 of the air flow conduit in which it is
positioned. An advantage this design is that the discharged water
mist disperses more evenly across the cross-section of the fan coil
air flow path 136 for better exposure to the air passing
therethrough. As a result, the discharged water mist may be more
efficiently absorbed into the air flow so that less water mist may
accumulate in the fan coil apparatus. In turn, the misting portion
168 consumes less power by activating less frequently, by
activating at a lower power setting, or by including a less
powerful water mist production member. Also, less water may be
consumed by misting portion 168 because less water is lost to
accumulation. Depending on the depth (front to back) of the air
outlet, distribution duct may be at an angle to the air flow
direction, thereby permitting a longer distribution tube 344.
[0269] Returning to FIG. 7, distribution tube 344 may include any
number of outlets 360. Preferably, distribution tube includes a
plurality of outlets 360 to enhance the distribution of water mist
into the fan coil air flow path 136. In the illustrated example,
distribution tube 344 includes ten outlets 360. Distribution tube
outlets 360 may have any size and shape suitable for discharging
the air and water mist mixture into the fan coil air flow path 136.
For example, in other embodiments, water mist distribution tube 344
may have one or more longitudinally extending openings or slits or
a plurality of slits, each of which may extend part way along
length 348. Water mist distribution tube 344 may have one or more
outlets of any size which permit the air travelling through the
misting unit to exit into the air flow path. In the illustrated
example, each distribution tube outlet 360 is equally sized and
shaped as a small circular perforation in the hollow distribution
tube 344. An advantage of this design is that the air and water
mist mixture may discharge relatively equally from each
distribution tube outlet 360. In alternative embodiments,
distribution tube outlet 360 may include outlets 360 of different
sizes, different shapes, or both. An advantage of this design is
that the size and shape of each distribution tube outlet 360 may be
selected to correspond with the shape and flow characteristics of
the fan coil air flow path 136. For example, distribution tube
outlets 360 nearer to the walls of the fan coil housing 104 (FIG.
6) may be sized and shaped to discharge less water mist than the
more centrally located outlets 360 to reduce accumulation on the
fan coil housing 104.
[0270] Distribution tube outlets 360 may be distributed across all
or any portion of the air conduit transverse length 368.
Preferably, distribution tube outlets 360 extend across at least
50%, 60%, 70%, 80%, 90% or more of air conduit transverse length
368, as shown. An advantage of this design is that it allows the
water mist discharged from the distribution tube outlets 360 to be
more evenly distributed across the fan coil air flow path 136.
[0271] Water droplets may accumulate in water mist distribution
tube 344. Therefore, distribution tube 344 may be sloped to direct
the flow of accumulated water droplets inside of distribution tube
344 away from outlets 360. An advantage of this design is that
water may be inhibited from dripping out of outlets 360 of
distribution tube 344. As exemplified in FIG. 6, distribution tube
second end 356 is elevated above distribution tube first end 352.
An advantage of this design is that water droplets that accumulate
from the air and water mist mixture may flow by gravity towards
distribution tube first end 352, through misting portion air outlet
conduit 346, into water tank 224. This recycles the accumulated
water to be reused for mist generation. FIG. 17 shows an example in
which distribution tube first end 352 is elevated above
distribution tube second end 356. In this example, distribution
tube second end 356 may be open to form a drain 392. As shown,
distribution tube drain 392 may be connected to a drain conduit 396
for directing drain water downstream to, e.g. a municipal drain or
recirculation back into misting portion, as described above with
respect to drain 376 and drain conduit 384 (FIG. 7). FIG. 18 shows
an example in which water mist distribution tube 344 includes a
central portion 402 located between and elevated above distribution
tube first and second ends 352 and 356. In this example, some water
droplets that are not evaporated may flow towards distribution tube
first end 352 and others towards distribution tube second end 356.
In other embodiments, it will be appreciated that distribution tube
344 may extend horizontally or in any other direction or
directions.
[0272] Optionally, as exemplified in FIGS. 6-7, in some embodiments
humidification unit 164 may be configured with a water impermeable
container 372 positioned below (i.e. at a lower elevation than)
mist distributor 340. The water impermeable container 372 may be
positioned below outlets 360 to catch dripping water droplets,
accumulated from the discharging air and water mist mixture. An
advantage of this design is that it prevents the water droplets
from pooling inside fan coil housing 104 and potentially leaking in
the apparatus surroundings (e.g. inside the wall in which apparatus
100 is recessed).
[0273] Water impermeable container 372 may have any configuration
suitable for catching and optionally draining away accumulated
water from mist distributor 340. In the illustrated example, water
impermeable container 372 is formed as an angled trough having a
drain outlet 376 at its lower end 380. Water collected in water
impermeable container 372 will flow by gravity downwards to drain
outlet 376, which discharges the collected water (also referred to
as drain water) downstream to, e.g. a municipal drain, or
recirculation back into misting portion 168. An advantage of
recirculating the collected water back into misting portion 168 is
that the reused water reduces water consumption by displacing water
otherwise drawn from water supply 180 (FIG. 3). In the illustrated
example, a drain conduit 384 is connected to drain outlet 376 for
directing drain water downstream.
[0274] FIG. 7 shows an example in which drain conduit 384 directs
drain water directly into the water tank of misting portion 168 to
use in generating water mist. FIG. 15 shows an example in which
drain conduit 384 directs drain water toward fan coil drain 312,
which leads outside of fan coil apparatus 100, such as to a
municipal drain or outdoors. FIG. 16 shows an example in which
drain conduit 384 directs collected water to a venturi device 388
upstream of filter portion 204. Venturi device 388 is substantially
similar to venturi device 316 (FIG. 11), and includes a venturi
pipe 320 having a water supply inlet 324, a drain water inlet 328,
and a misting portion outlet 332. Water supply inlet 324 is fluidly
connected downstream of water supply 180, drain water inlet 328 is
fluidly connected downstream of drain outlet 376, and misting
portion outlet 332 is fluidly connected upstream of misting portion
168, such as downstream of filter portion 204 as shown. Venturi
device 388 may also include a filter 336 positioned upstream of
drain water inlet 328 or downstream of misting portion outlet
332.
Air Permeable Water Retaining Member
[0275] The following is a description of an air impermeable water
retaining member that may be used by itself or in combination with
one or more other features disclosed herein including one or more
of an air scoop, a misting portion water impermeable container,
mist distributor, a filter portion, a leak detection control
system, and a treatment applicator.
[0276] In accordance with this feature, humidification unit 164 may
include an air permeable water retaining member 456 positioned in
the fan coil air flow path 136 downstream of mist distributor 340.
The air permeable water retaining member 456 allows the humidified
air flow to pass through and retain (e.g., adsorbs, adsorbs or
physically retains) excess water emitted from the distributor 340
that is not entrained or evaporated into the humidified air flow.
An advantage of this design is that liquid water in the air flow is
removed from the air flow instead of pooling in fan coil housing
104, a downstream air flow vent, or a room serviced by fan coil
apparatus 100.
[0277] As exemplified in FIG. 27, air permeable water retaining
member 456 may be positioned anywhere in the fan coil air flow path
136 downstream of mist distributor 340. Preferably, air permeable
water retaining member 456 is spaced apart from mist distributor
340 sufficiently to allow the discharged water mist an opportunity
to evaporate into the air flow. In the illustrated example, air
permeable water retaining member 456 is positioned in the air exit
plenum 156 immediately upstream of fan coil air outlet 116. An
advantage of this design is that water mist discharged from mist
distributor 340 is given an extended opportunity to evaporate into
the air flow before the remaining liquid phase water is removed
from the air flow by air permeable water retaining member 456.
[0278] Air permeable water retaining member 456 may be mounted in
position in the fan coil air flow path 136 in any suitable manner.
As exemplified in FIGS. 28 and 29, humidification unit 164 includes
a water impermeable container 460 which holds air permeable water
retaining member 456. For example, air permeable water retaining
member 456 may be seated on of located above water impermeable
container 460. An advantage of this design is that water
impermeable container 460 may collect water that flows or drips
from air permeable water retaining member 456.
[0279] Water impermeable container 460 may have any configuration
suitable for holding air permeable water retaining member 456 in
position, and/or catching water that flows or drips from air
permeable water retaining member 456. In the illustrated example,
water impermeable container 460 includes an optional drain outlet
464 that provides an outlet for water collected on water
impermeable container 460. An advantage of this design is that
water that flows or drips from water impermeable container 460 may
be redirected through drain outlet 464 to, e.g. a municipal drain,
or recirculated back into misting portion 168. This prevents the
water collected on water impermeable container 460 from spilling
into the fan coil apparatus 100 and leaking into the fan coil's
surroundings (e.g. inside the wall of a room). In the illustrated
example, a drain conduit 464 is connected to water impermeable
container 460 for directing the drain water downstream.
[0280] Drain conduit 464 may be substantially similar to drain
conduit 376. As described previously with respect to drain conduit
376, drain conduit 464 may direct drain water towards fan coil
drain 312, water tank 224 of misting portion 168, or to filter
portion 204 such as by way of a venturi device 388 (FIG. 16). In
this regard, the description and drawings relating to drain conduit
376 apply mutatis mutandis to drain conduit 464, and repetitive
description and drawings for drain conduit 464 are not
provided.
[0281] Air permeable water retaining member 456 may be secured or
removably secured in position using any support or holding
structure. Preferably, air permeable water retaining member 456
overlies (e.g. is positioned above or is seated on) water
impermeable container 460 so that water may drip or flow by gravity
from air permeable water retaining member 456 to water impermeable
container 460. In some embodiments, water impermeable container 460
may be integrally formed with or permanently connected to air
permeable water retaining member 456. In the illustrated example,
air permeable water retaining member 456 is removably seated (e.g.
removably received in) water impermeable container 460. An
advantage of this design is that it allows air permeable water
retaining member 456 to be removed for cleaning, repair, or
replacement should that be required.
[0282] Still referring to FIGS. 28-29, air permeable water
retaining member 456 can have any size and shape suitable for
retaining excess water from the air flow in fan coil air flow path
136. As exemplified, air permeable water retaining member 456 has a
length 468 transverse to the fan coil air flow path downstream
direction 268, a height 472 transverse to the fan coil air flow
path downstream direction 268, and a thickness 476 parallel to the
fan coil air flow path downstream direction 268. The length 468 and
height 472 may be sized so that air permeable water retaining
member 456 spans at least a majority, and preferably substantially
the entire cross-section of the fan coil air flow path 136. An
advantage of this design is that a majority or substantially all of
the air flow through fan coil air flow path 136 may pass through
air permeable water retaining member 456, and therefore a majority
or substantially all of the excess water can be retained by air
permeable water retaining member 456. Thickness 476 is preferably
sized to optimize water retention efficiency. If thickness 476 is
too great, then air permeable water retaining member 456 may
obstruct the air flow through fan coil air flow path 136. If
thickness 476 is too thin, then air permeable water retaining
member 456 may have too little water retention capacity.
[0283] Air permeable water retaining member 456 may be formed of
any material suitable for retaining excess water from the air flow
in fan coil air flow path 136 and which, preferably, will not rust.
For example, air permeable water retaining member 456 may comprise
an open cell material, such as an open cell foam (see e.g., FIG.
30), an open cell plastic, an aluminum mesh, aluminum plates or the
like. For example, FIG. 31 exemplifies an air permeable water
retaining member 456 includes a layered material, such as layered
aluminum mesh or layered aluminum plates.
Filter Portion
[0284] The following is a description of an filter portion that may
be used by itself or in combination with one or more other features
disclosed herein including one or more of an air scoop, a misting
portion water impermeable container, mist distributor, a leak
detection control system, an air permeable water retaining member
and a treatment applicator. Optionally, in accordance with this
feature, a water filter is provided upstream of the mist production
member. An advantage of this design is that, if the mist producing
member is a nebulizer or the like, then scaling or fouling of the
mist production member may be reduced.
[0285] FIGS. 19 and 20 exemplify a filter portion 204 which may
include a water filter 404 positioned in the water flow path
between water supply 180 and misting portion 168. Water filter 404
may be any type of filter suitable for filtering water supplied to
misting portion 168 (FIG. 5) for impurities, such as contaminants
and minerals. For example, water filter 404 may include physical,
chemical, or biological means of removing water impurities. Water
filter 404 includes an inlet 408 downstream of water supply 180,
and an outlet 412 upstream of misting portion 168 (FIG. 5). In the
illustrated example, an optional shut-off valve 184 is positioned
upstream of water filter inlet 408 between water filter inlet 408
and water supply 180. In alternative embodiments, shut-off valve
184 may be positioned downstream of water filter outlet 412 or may
not be provided.
[0286] Filter portion 204 may include any number of water filters
404. FIGS. 19 and 20 show an example of filter portion 204
including one water filter 404. An advantage of having a single
water filter 404 is that only one water filter 404 needs to be
periodically cleaned or replaced. FIG. 21 shows an example of
filter portion 204 including a plurality of water filters 404 in
series. An advantage of having a plurality of water filters in
series 404 is that each water filter 404 may be specially
configured to remove different impurities.
[0287] Referring again to FIGS. 19 and 20, in some embodiments,
filter portion 204 may include a leak container 416 to collect
water that may leak from water filter 404 and/or shut-off valve
184. As shown, water filter 404 and shut-off valve 184 may overlie
at least a portion of an open interior of filter portion leak
container 416 so that leaking water from filter portion 204 and/or
shut-off valve 184 may fall by gravity into filter portion leak
container 416. An advantage of this design is that filter portion
leak container 416 may collect any water that may leak from water
filter 404 and/or shut-off valve 184 instead of that water pooling
inside fan coil housing 104 and potentially leaking into the
apparatus surroundings (e.g. inside the wall in which apparatus 100
is recessed).
[0288] As shown, filter portion leak container 416 may include a
drain 420 that provides an outlet for water collected in filter
portion leak container 416. An advantage of this design is that
water leaking from water filter 404 and/or shut-off valve 184 may
be redirected through drain 420 to, e.g. a municipal drain, or
recirculated back into the water flow path between water supply 180
and misting portion 168 (FIG. 5). In the illustrated example, a
drain conduit 424 is connected to leak container drain 420 for
directing drain water downstream.
[0289] FIG. 5 shows an example in which leak container drain
conduit 424 directs drain water towards fan coil drain 312, which
leads outside of fan coil apparatus 100, such as to a municipal
drain or outdoors. FIG. 22 shows an example in which leak container
drain conduit 424 directs water to recirculate back into water
filter inlet 408. As shown, leak container drain conduit 424 may be
fluidly connected to a venturi device 316. The venture device 316
combines the drain water with water from water supply 180 upstream
of water filter 404. An advantage of this design is that water
consumption is reduced by recycling the drain water instead of
discarding the drain water (e.g. to a municipal drain).
Leak Detection Control System
[0290] The following is a description of leak detection control
system that may be used by itself or in combination with one or
more other features disclosed herein including one or more of an
air scoop, a misting portion water impermeable container, mist
distributor, a filter portion, an air permeable water retaining
member and a treatment applicator.
[0291] In accordance with this feature, the water supply to, e.g,
tank 224, may be shut off if a leak is detected. An advantage of
this design is that water to the humidification unit may be stopped
before, e.g., leak containers 296 or 416 overflow and spill water
into the fan coil housing 104.
[0292] As exemplified in FIGS. 19 and 23, one or both of misting
portion 168 and filter portion 204 may include a leak water level
detector 428. Leak water level detector 428 may be communicatively
coupled (e.g. electrically connected) to a controller, which may be
humidification unit controller 172. Humidification unit controller
172 may direct the shut-off valve 184 to move to the closed
position in response to any one or more of the leak water level
detectors 428 sensing a high water level. As exemplified, misting
portion 168 may include a leak water level detector 428.sub.1 to
sense a water level in misting portion leak container 296, or
filter portion 204 may include a leak water level detector
428.sub.2 to sense a water level in filter portion leak container
416, or both.
[0293] Leak water level detectors 428 may have any configuration
suitable for detecting a high water level condition in a leak
container 296 or 416. For example, leak water level detectors 428
may include one or more float switches as exemplified, pressure
sensors, optical sensors, capacitance sensors, ultrasonic sensors,
or laser sensors. In the illustrated embodiment, water level
detectors 428 are electrically connected to humidification unit
controller 172 by wires 432, which may also provide water level
detectors 428 with power to operate, if required. In other
embodiments, other means of communication may be used including
wireless (e.g., Bluetooth), optical, or the like.
[0294] In some embodiments, leak water level detectors 428 may
sense the presence of a high water level and a low water level in a
leak container 296 or 416. FIG. 23 shows an example of leak water
level detector 428 in a first position and sensing a low water
level, and FIG. 24 shows an example of the leak water level
detector 428.sub.1 in a second position and sensing a high water
level.
[0295] Returning to FIGS. 19 and 23, preferably, humidification
unit controller 172 directs shut-off valve 184 to move to its
closed position in response to determining that any of the leak
water level detectors 428 senses a high water level. For example,
humidification unit controller 172 may intermittently poll leak
water level detectors 428 for a water level status, leak water
level detectors 428 may intermittently report the water level
status to humidification unit controller 172, or humidification
unit controller 172 may continuously monitor leak water level
detectors 428 for a high or low water level status. Humidification
unit controller 172 may permit shut-off valve 184 to move to its
open position in response to determining that all of the leak water
level detectors 428 sense a low water level. However, even if all
of the leak water level detectors 428 sense a low water level,
humidification unit controller 172 may yet direct shut-off valve
184 to move to or stay in the closed position until other factors
are satisfied, such as receiving a signal from air regulating
device 120 (FIG. 3) instructing that humidity is required.
[0296] In some embodiments, humidification unit controller 172
directs shut-off valve 184 to move to its closed position in
response to determining that any one of the leak water level
detectors 428 is not sensing a low water level, even if none of the
leak water level detectors 428 is sensing a high water level. For
example, humidification unit controller 172 may only direct or
permit shut-off valve 184 to move to its open position in response
to determining that each of the leak water level detectors 428 is
sensing a lower water level.
[0297] Still referring to FIGS. 19 and 23, in some embodiments
misting portion inner container 292 may include a water level
detector 428.sub.3 to sense the water level in misting portion
inner container 292 and/or water tank 224. Water level detector
428.sub.3 may be communicatively coupled (e.g. electrically
connected) to humidification unit controller 172, such as by wire
436.sub.3. Humidification unit controller 172 may direct the
shut-off valve 184 to move to the closed position in response to
water level detector 428.sub.3 (or any other water level detector
428) sensing a high water level. An advantage of this design is
that the water level in water tank 224 may be prevented from rising
above a preset level, e.g., a the maximum water level that allows
water mist production member 232 to generate water mist
efficiently, and/or water tank 224 is prevented from overflowing.
Once the inflow of water is shut off, the water level will lower
again as the water mist production member 232 consumes water to
generate water mist.
[0298] In some embodiments, water lever detector 428.sub.3 may also
sense a low water level in water tank 224. In response, to water
level detector 428.sub.3 detecting a low water level,
humidification unit controller 172 (FIG. 5) may deactivate water
mist production member 232. For example, humidification unit
controller 172 (FIG. 5) may cut power to water mist production
member 232 or signal water mist production member 232 to stop
generating water mist. An advantage of this design is that water
mist production member 232 may be prevented from damage by
operating with insufficient water present. While water mist
production member 232 is deactivated, the water level in water tank
224 may rise as water flows into misting portion 168. Once the
water level in water tank 224 is at a safe operating water level
(e.g. once water mist production member 232 ceases to sense a low
water level), the water mist production member 232 may respond by
re-activate water mist production member 232.
[0299] Reference is now made to FIGS. 10 and 25-26. In some
embodiments, water level detector 428.sub.3 may be positioned
outside of the water tank 224. For example, misting portion inner
container 292 may include a water mist production member chamber
220 including water tank 224, and a water reservoir 436. As
exemplified, the water tank 224 and water reservoir 436 may be
separated by a separating wall 440. An advantage of this design is
that the water level detector 428.sub.3 is at least partially
insulated from water mist production member 232. For example,
separating wall 440 may at least partially insulate water level
detector 428.sub.3 from the high frequency ultrasonic waves emitted
by nebulizer 284, which may affect, interfere with, or damage water
level detector 428.sub.3.
[0300] Misting portion water reservoir 436 is fluidly coupled with
water tank 224 and may be laterally spaced therefrom so that the
water level in water reservoir 436 may correspond to the water
level in water tank 224. This allows water level detector 428.sub.3
to sense a high or low water level in water tank 224 based on the
water level in misting portion water reservoir 436. In the
illustrated example, misting portion water reservoir 436 is fluidly
coupled to water tank 224 by a fluid flow port 444. Fluid flow port
444 may have any configuration that allows water to flow freely
between water reservoir 436 and water tank 224. In the illustrated
example, fluid flow port 444 is formed as an aperture, recess, or
cutaway in a lower portion 448 of separating wall 440. Preferably,
fluid flow port 444 is positioned at an elevation above water mist
production member 232. It will be appreciated that by laterally
positioning water reservoir 436 from tank 224, water level detector
428.sub.3 may be set such that the high water level in water
reservoir 436 corresponds to a maximum desired water level in tank
224 and, similarly, the low water level in water reservoir 436
corresponds to a minimum desired water level in tank 224.
[0301] Optionally, the air flow path through the humidification
unit may pass over water reservoir 436. Accordingly, as exemplified
in FIG. 10, misting portion separating wall 440 may be configured
to allow (e.g. not obstruct) misting portion air flow path 236 to
pass over misting portion water reservoir 436 to the air plenum 228
above water tank 224. For example, misting portion separating wall
440 may have an upper end 452 spaced apart from misting portion
upper wall 240 as shown, or may have one or more air flow ports to
allow air to flow through.
[0302] Referring to FIGS. 5 and 10, humidification unit controller
172 may be any device suitable to execute the functionality
described herein. For example, humidification unit 164 may be a
computing device (e.g. including a processor and memory), or a
logic circuit. In some embodiments, the relationship between the
shut-off valve 184 and water level sensations by water level
detectors 428 may be hardwired without use of humidification unit
controller 172. For example, FIG. 32 shows an example power circuit
490 in which power to shut-off valve 184 depends on the position
(or water level sensation) of water level detectors 428. In this
example, shut-off valve 184 moves to the closed position upon
losing power, and water level detectors 428 open the power circuit
in response to detecting a high water level. As a result, shut-off
valve 184 loses power and moves to the closed position in response
to any of water level detectors 428 sensing a high water level.
[0303] As exemplified in FIG. 32, if water level sensor 428.sub.1
detects a high water level in misting portion leak container 296,
(e.g., a float switch rises to a high water level position), then
water level sensor 428.sub.1 may send a signal that opens circuit
490 as exemplified in FIG. 32. This may occur if, e.g., the drain
of misting portion leak container 296 becomes blocked and the water
level in misting portion leak container 296 rises and or there is a
rapid leak and the water level in misting portion leak container
296 rises. In such a case, shut off valve 184 may move to the
closed position (e.g., solenoid valve may be configured to move to
the closed position when the circuit is open and no power is
provided to the solenoid). It will be appreciated that when the
water level drops in misting portion leak container 296, e.g.,
water is drained by the drain conduit, that the water level will
drop and a signal may no longer be provided by the sensor (e.g.,
the float switch drops). Accordingly, the circuit will close,
thereby providing power to shut-off valve 184 and causing the valve
to open and permitting water to enter the apparatus.
[0304] Similarly, if water level sensor 428.sub.3 detects a high
water level in misting portion inner container 292 and/or water
tank 224 (e.g., a float switch rises to a high water level
position), then water level sensor 428.sub.3 may send a signal that
opens circuit 490 as exemplified in FIG. 32 and shut off valve 184
may move to the closed position. In such a case, the misting
portion inner container 292 and/or water tank 224 will be at the
high water level and no more water is required until the mist
producing member has used sufficient water for the water level to
drop and the sensor to no longer detect a high water level (e.g., a
float switch drops from a high water level).
[0305] Similarly, if water level sensor 428.sub.2 detects a high
water level in filter portion leak container 416 (e.g., a float
switch rises to a high water level position), then water level
sensor 428.sub.2 may send a signal that opens circuit 490 as
exemplified in FIG. 32 and shut off valve 184 may move to the
closed position. This may occur if, e.g., the drain of filter
portion leak container 416 becomes blocked and the water level in
filter portion leak container 416 rises and or there is a rapid
leak and the water level in filter portion leak container 416
rises.
[0306] It will be appreciated that, as long as one high water level
is detected, that shut off valve 184 will close the water inlet
line.
[0307] In an alternate embodiment, circuit 490 may remain open
until water level sensor 428.sub.1 detects a low water level in
misting portion leak container 296,
[0308] In a further alternate embodiment, shut-off valve may be
configured to close if the circuit is closed. In such a case, water
level sensors 428 may be configured to send a signal when not at a
high water level. When they reach a high water level, they may
cease sending a signal, in which case the circuit may close.
Treatment Applicator
[0309] The following is a description of a treatment applicator
that may be used by itself or in combination with one or more other
features disclosed herein including one or more of an air scoop, a
misting portion water impermeable container, mist distributor, a
filter portion, a leak detection control system and an air
permeable water retaining member.
[0310] In accordance with this feature, a treatment applicator is
provided which provides a disinfecting agent to the humidification
unit to inhibit and, preferably prevent the growth of
microorganisms, mold, bacteria, and the like (collectively referred
herein as `organisms`).
[0311] As exemplified in FIG. 27, fan coil air flow path 136 may
comprise a humidification section 480 in which water mist
discharged by mist distributor 340 mixes with air flow in the fan
coil air flow path 136. In the illustrated embodiment, the
humidification section 480 is shown between heating zone 148 and
fan coil air outlet 116, such as in air exit plenum 156. However,
in other embodiments, humidification section 480 may be positioned
elsewhere along the fan coil air flow path 136.
[0312] The conditions in humidification section 480 (e.g. presence
of hot and humid air, and possibly accumulated water droplets) may
result in the growth of organisms. Such organisms may have a
negative effect of the air purity discharged from fan coil
apparatus 100. In some embodiments, fan coil apparatus 100 includes
one or more treatment applicators 484 that provide one or more
disinfecting agents in the humidification section 480 to reduce or
eliminate organisms in the humidification section 480. An advantage
of this design is that it helps to purify the air discharged from
fan coil apparatus 100 by reducing or eliminating potentially
harmful organisms that may be come entrained in the air flow.
[0313] Disinfecting agents may be any element or emission that may
reduce or inhibit growth of organisms in humidification section
480, or that are harmful or lethal to organisms that may grow in
humidification section 480. Examples include ultra-violet (UV)
light, ozone (O.sub.3), and hydrogen peroxide (H.sub.2O.sub.2). In
the illustrated embodiment, fan coil apparatus 100 is shown
including a UV light emitter 484.sub.1, an ozone gas emitter
484.sub.2, and a hydrogen peroxide vapor emitter 484.sub.3, which
emit UV light, ozone gas, and hydrogen peroxide vapor,
respectively, into humidification section 480.
[0314] Ozone gas may be highly effective for purifying an air flow.
However, ozone gas may be also harmful to breath for humans and
animals. Some embodiments which include an ozone gas emitter
484.sub.2 may also include an ozone destructor material 488
positioned in the fan coil air flow path 136 downstream of ozone
gas emitter 484.sub.2. The ozone destructor material 488 may be any
material that can remove ozone gas from the air flow by adsorption
or conversion to one or more other molecules. Examples include
activated carbon or an ozone catalyst that converts ozone (O.sub.3)
to oxygen (O.sub.2). An advantage of this design is that the ozone
gas that is added to the air flow to counteract organisms in the
humidification section 480 may be removed before the air flow is
discharged from fan coil apparatus 100. This can allow a fan coil
apparatus 100 including ozone gas emitter 484.sub.2 to be safely
employed in, e.g. residential spaces.
[0315] Alternately or in addition, as exemplified in FIG. 23,
misting portion 168 may comprise a treatment applicator 492 to
counteract organisms inside misting portion 168. For example,
misting portion 168 may include a treatment applicator 492 that
provides a disinfecting agent in misting portion inner container
292. An advantage of this design is that it can mitigate or
eliminate the growth of organisms inside misting portion inner
container 292, such as organisms that may grow in water tank 224,
air plenum 228, or along misting portion air flow path 236.
Treatment applicator 492 may be the same as or similar to treatment
applicator 484. As with treatment applicator 484, treatment
applicator 492 may produce any disinfecting agent that may reduce
or inhibit growth of organisms in misting portion 168, or that may
be harmful or lethal to organisms that may grow in misting portion
168. Examples of disinfecting agents include ultra-violet (UV)
light, ozone (O.sub.3), and hydrogen peroxide (H.sub.2O.sub.2). In
the illustrated embodiment, misting portion 168 is shown including
a UV light emitter 492, which emits UV light into water mist
production chamber 220.
[0316] While the above description provides examples of the
embodiments, it will be appreciated that some features and/or
functions of the described embodiments are susceptible to
modification without departing from the spirit and principles of
operation of the described embodiments. Accordingly, what has been
described above has been intended to be illustrative of the
invention and non-limiting and it will be understood by persons
skilled in the art that other variants and modifications may be
made without departing from the scope of the invention as defined
in the claims appended hereto. The scope of the claims should not
be limited by the preferred embodiments and examples, but should be
given the broadest interpretation consistent with the description
as a whole.
* * * * *