U.S. patent application number 13/111460 was filed with the patent office on 2011-11-24 for bath system and method.
Invention is credited to Justin Lee Kenoyer, Michael Lee Kenoyer, Jason C. Weaver.
Application Number | 20110283448 13/111460 |
Document ID | / |
Family ID | 44626636 |
Filed Date | 2011-11-24 |
United States Patent
Application |
20110283448 |
Kind Code |
A1 |
Kenoyer; Michael Lee ; et
al. |
November 24, 2011 |
BATH SYSTEM AND METHOD
Abstract
Provided is a bath fluid heating system that includes an inlet,
an outlet, a pump located in a fluid path extending between the
inlet and the outlet, a heater located in the fluid path extending
between the inlet and the outlet. During use, a bathing fluid is to
flow into the inlet, to flow through the heater, to flow through
the pump and to flow out of the outlet. The fluid path is oriented
at an angle to facilitate drainage of substantially all of the
bathing fluid from the fluid path.
Inventors: |
Kenoyer; Michael Lee;
(Austin, TX) ; Weaver; Jason C.; (Austin, TX)
; Kenoyer; Justin Lee; (Austin, TX) |
Family ID: |
44626636 |
Appl. No.: |
13/111460 |
Filed: |
May 19, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61346357 |
May 19, 2010 |
|
|
|
Current U.S.
Class: |
4/541.3 |
Current CPC
Class: |
F24H 1/0081 20130101;
F24H 9/2014 20130101; A61H 33/601 20130101; A61H 33/00 20130101;
E03C 1/044 20130101; A61H 33/6068 20130101; G05D 23/19
20130101 |
Class at
Publication: |
4/541.3 |
International
Class: |
A47K 3/02 20060101
A47K003/02 |
Claims
1. A method of maintaining a bath fluid temperature, comprising:
monitoring a bath fluid temperature to identify a first temperature
of the fluid; identifying the first temperature; maintaining the
bath fluid at the first fluid temperature; identifying a
temperature change threshold; monitoring the bath fluid temperature
to detect a change in the bath fluid temperature, detecting a
change in the bath fluid temperature from the first temperature to
a second temperature, wherein the change in the bath fluid
temperature exceeds the temperature change threshold; and
maintaining, in response to detecting a change in the bath fluid
temperature from the first temperature to a second temperature, the
bath fluid at the second fluid temperature.
2. The method of claim 1, wherein the temperature change threshold
comprises an absolute difference in temperature.
3. The method of claim 1, wherein the temperature change threshold
comprises a rate of change in temperature.
4. A bath fluid heating system, comprising: an inlet; an outlet; a
pump located in a fluid path extending between the inlet and the
outlet; a heater located in the fluid path extending between the
inlet and the outlet; wherein, during use, a bathing fluid is
configured to flow into the inlet, to flow through the heater, to
flow through the pump and to flow out of the outlet, and wherein
the fluid path is oriented at an angle configured to facilitate
drainage of substantially all of the bathing fluid from the fluid
path.
5. The bath fluid heating system of claim 4, wherein the inlet,
outlet, the pump and the heater are disposed in cascading
arrangement with respect to one another.
6. The bath fluid heating system of claim 4, further comprising
conduits extending between each of the inlet, the pump, the heater,
and/or the outlet, wherein the conduit is substantially level or
angled downward.
7. The bath fluid heating system of claim 4, wherein the heater is
angled downward such that an outlet of the heater is below an inlet
of the heater.
8. The bath fluid heating system of claim 4, wherein the outlet is
disposed below the inlet, the pump and the heater.
9. The bath fluid heating system of claim 4, wherein the outlet
comprises a drain port.
10. A fluid outlet system for a bathing fluid circulation system,
comprising: a baffle comprising: a body configured to be disposed
adjacent an interior wall of bathtub wall; an inlet configured to
receive water flow from a fluid circulation system; and one or more
lateral ports configured to expel the water flow from the outlet in
a direction substantially parallel to the interior wall of the
bathtub.
11. The fluid outlet system of claim 10, wherein the baffle
comprises a plurality of lateral ports disposed about a
circumference of the baffle body.
12. The fluid outlet system of claim 10, wherein the baffle
comprises a substantially solid central portion configured to
direct fluid flow into the lateral ports.
13. The fluid outlet system of claim 10, wherein the baffle
comprises a substantially solid central portion configured to block
fluid from exiting substantially perpendicular to the to the
interior wall of the bathtub.
14. A method, comprising: identifying a cavitation condition in a
fluid path comprising a pump; and cycling, in response to
identifying the cavitation condition, the pump into an inactive
state for a given period of time.
15. The method of claim 14, wherein identifying a cavitation
condition in a fluid path comprising a pump comprises detecting a
drop in power consumption by the pump.
16. The method of claim 14, wherein identifying a cavitation
condition in a fluid path comprising a pump comprises detecting in
increase in temperature along the fluid path that exceeds a
threshold temperature change.
17. The method of claim 14, wherein cycling the pump into an
inactive state for a given period of time comprises turning the
pump off for a period of time sufficient to allow trapped air to
escape via the fluid path.
Description
PRIORITY CLAIM
[0001] This application claims benefit of priority to U.S.
Provisional Patent Application Ser. No. 61/346,357, entitled
"Improved Bathtub Heating Device", filed May 19, 2010, by Michael
Lee Kenoyer et al, which is hereby incorporated by reference in its
entirety as though fully and completely set forth herein.
BACKGROUND
[0002] 1. Field of the Invention
[0003] The present invention relates bathtubs and, more
specifically, to techniques for heating and circulating bathing
fluid.
[0004] 2. Description of Related Art
[0005] Individuals often enjoy taking long baths for relaxation.
Unfortunately, typical bathing environments suffer from various
shortcomings. For example, the water in a typical bath may cool
overtime, requiring the bather to add warm water several times of
the course of a bath in an attempt to remain comfortable. This can
interrupt the user's bathing experience and can, at times, cause
discomfort to the user.
[0006] Some baths have been designed to include heating. For
example, some jetted hot-tubs include systems to heat and circulate
water at a high volume though jetted ports to provide turbulent
water flow. The turbulent water flow is expected to provide a
massage-like experience to the user. Some jetted hot-tubs allow a
user to select a set-point temperature for the water via a user
interface, such as keypad or dial. Unfortunately, these bathing
environments may not provide a calm relaxing experience, as the
user may have to continually add water, may be subject to noise and
discomfort due to the turbulent high-volume flow of water, and may
have to manually adjust the set-point temperature to achieve a
desired water temperature.
[0007] Accordingly, it may be desirable to provide a bathing
environment that provides a calm and relaxing bathing
experience.
SUMMARY
[0008] Various embodiments of bath fluid heating and circulation
systems and related apparatus, and methods of operating the same
are described. In some embodiments, provided is a method of
maintaining a bath fluid temperature. The method includes
monitoring a bath fluid temperature to identify a first temperature
of the fluid, identifying the first temperature, maintaining the
bath fluid at the first fluid temperature, identifying a
temperature change threshold, monitoring the bath fluid temperature
to detect a change in the bath fluid temperature, detecting a
change in the bath fluid temperature from the first temperature to
a second temperature, wherein the change in the bath fluid
temperature exceeds the temperature change threshold, and
maintaining, in response to detecting a change in the bath fluid
temperature from the first temperature to a second temperature, the
bath fluid at the second fluid temperature.
[0009] In the method the temperature change threshold may include
an absolute difference in temperature and/or a rate of change in
temperature. In some embodiments, the method may include
automatically activating a heating/circulation system for
maintaining the fluid temperature upon detecting a presence of the
bathing fluid and/or the level of the fluid meeting or exceeding a
minimum level threshold level.
[0010] In some embodiments, provided is a bath fluid heating system
that includes an inlet, an outlet, a pump located in a fluid path
extending between the inlet and the outlet, a heater located in the
fluid path extending between the inlet and the outlet. During use,
a bathing fluid is to flow into the inlet, to flow through the
heater, to flow through the pump and to flow out of the outlet. The
fluid path is oriented at an angle to facilitate drainage of
substantially all of the bathing fluid from the fluid path.
[0011] In the bath fluid heating system the inlet, outlet, the pump
and the heater may be disposed in cascading arrangement with
respect to one another, conduits may extend between each of the
inlet, the pump, the heater, and/or the outlet, the conduit may be
substantially level or angled downward, the heater may be angled
downward such that an outlet of the heater is below an inlet of the
heater, the outlet may be disposed below the inlet, the pump and
the heater, and/or the outlet may include a drain port.
[0012] In some embodiments, provided is a fluid outlet system for a
bathing fluid circulation system. The outlet system including a
baffle having a body to be disposed adjacent an interior wall of
bathtub wall, an inlet configured to receive water flow from a
fluid circulation system, and one or more lateral ports configured
to expel the water flow from the outlet in a direction
substantially parallel to the interior wall of the bathtub.
[0013] In the fluid outlet system the baffle may include a
plurality of lateral ports disposed about a circumference of the
baffle body, the baffle may include a substantially solid central
portion configured to direct fluid flow into the lateral ports,
and/or the baffle may include a substantially solid central portion
configured to block fluid from exiting substantially perpendicular
to the to the interior wall of the bathtub.
[0014] In some embodiments, provided is a method that includes
identifying a cavitation condition in a fluid path comprising a
pump and, cycling, in response to identifying the cavitation
condition, the pump into an inactive state for a given period of
time.
[0015] In the method identifying a cavitation condition in a fluid
path including a pump may include detecting a drop in power
consumption by the pump, identifying a cavitation condition in a
fluid path including a pump include detecting in increase in
temperature along the fluid path that exceeds a threshold
temperature change, and/or cycling the pump into an inactive state
for a given period of time may include turning the pump off for a
period of time sufficient to allow trapped air to escape via the
fluid path.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Advantages of the present invention will become apparent to
those skilled in the art with the benefit of the following detailed
description and upon reference to the accompanying drawings in
which:
[0017] FIG. 1 illustrates a bathing system in accordance with one
or more embodiments of the present technique.
[0018] FIGS. 2A and 2B illustrate detailed perspective views of a
heating system coupled to a bathtub in accordance with one or more
embodiments of the present technique.
[0019] FIGS. 3A and 3B illustrate a rear-perspective view and a
rear view, respectively, of a heating system coupled to a bathtub
in accordance with one or more embodiments of the present
technique.
[0020] FIG. 3C illustrates an interior view of a heater in
accordance with one or more embodiments of the present
technique.
[0021] FIG. 4 illustrates a perspective view of the heating system
in accordance with one or more embodiments of the present
technique.
[0022] FIG. 5 illustrates a front view of the heating system in
accordance with one or more embodiments of the present
technique.
[0023] FIG. 6 illustrates a left view of the heating system in
accordance with one or more embodiments of the present
technique.
[0024] FIG. 7 illustrates a right view of the heating system in
accordance with one or more embodiments of the present
technique.
[0025] FIG. 8 illustrates a right view including a cross-sectioned
view of an outlet of the heating system in accordance with one or
more embodiments of the present technique.
[0026] FIG. 9 illustrates a left view including a cross-sectioned
view of an intake of the heating system in accordance with one or
more embodiments of the present technique.
[0027] FIGS. 10-12 illustrate detailed cross-sectioned views of the
outlet of the heating system in accordance with one or more
embodiments of the present technique.
[0028] FIGS. 13 and 14 illustrate detailed cross-sectioned views of
the intake of the heating system in accordance with one or more
embodiments of the present technique.
[0029] FIG. 15 is a flow chart illustrating a method of
heating/circulating bathing fluid in accordance with one or more
embodiments of the present technique.
[0030] FIG. 16 is a flow chart illustrating a method of maintaining
bathing fluid at a desired temperature in accordance with one or
more embodiments of the present technique.
[0031] FIG. 17 is a flow chart illustrating a method of identifying
and addressing cavitation issues in accordance with one or more
embodiments of the present technique.
[0032] While the invention is susceptible to various modifications
and alternative forms, specific embodiments thereof are shown by
way of example in the drawings and will herein be described in
detail. The drawings may not be to scale. It should be understood,
however, that the drawings and detailed description thereto are not
intended to limit the invention to the particular form disclosed,
but to the contrary, the intention is to cover all modifications,
equivalents, and alternatives falling within the spirit and scope
of the present invention as defined by the appended claims.
Furthermore, note that the word "may" is used throughout this
application in a permissive sense (i.e., having the potential to,
being able to), not a mandatory sense (i.e., must). The term
"include", and derivations thereof, mean "including, but not
limited to". The term "coupled" means "directly or indirectly
connected".
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
[0033] As discussed in more detail below, certain embodiments of
the present technique include a system and method for heating and
circulating fluid (e.g., water) in a bathtub (e.g., a
bathtub/bathing fluid). In some embodiments, heating and
circulating a bathing fluid includes detecting various
characteristics of a bathing fluid (e.g., presence of fluid, a
change in bathing fluid temperature, etc.) and/or maintaining the
bathing fluid at a given temperature (e.g., the temperature
resulting from the change). In certain embodiments, heating and
circulating a bathing fluid includes monitoring various aspects of
bathing fluid flow (e.g., cavitation) and providing corrective
actions to maintain proper flow of the bathing fluid. In some
embodiments, heating and circulating bathing fluid employs a
substantially non-turbulent flow rate that provides a calm and
relaxing bathing environment to the user. In certain embodiments, a
flow path includes an outlet baffle to direct bathing fluid in a
path substantially tangential to a bathing surface proximate and/or
adjacent to the outlet nozzle. In some embodiments, heating and
circulating a bathing fluid includes draining substantially all of
the water from a circulation system such that a subsequent use will
not subject a user to a substantial amount of water remaining in
the circulation system from a prior. In some embodiments, a
circulation system includes a cascading arrangement of components
to provide for a substantially angle fluid flow path that enable
downward flow of the bathing fluid through the system during
drainage. In certain embodiments, a drainage port (e.g., a hole in
the lower portion of an outlet) may be provided at or near a low
point of the circulation system to facilitate drainage of
substantially all of the bathing fluid from the circulation system.
Drainage of all or substantially all of the bathing fluid from the
circulation system may help to reduce the amount of water remaining
in the system between uses and, thus, may help to prevent
subjecting the user/bather to old/remaining water during a future
use.
[0034] FIG. 1 illustrates a bathing system 100 in accordance with
one or more embodiments of the present technique. Bathing system
100 includes a heating system 102 coupled to a bathtub 104. Bathtub
104 may provide a bathing area 106 for holding bathing fluid (e.g.,
water) 108 for bathing. Bathing area 106 may be defined by interior
surfaces 110 of walls 112 of bathtub 104. Heating system 102 may be
coupled to an exterior surface 114 of walls 110 of bathtub 104.
[0035] FIGS. 2A and 2B illustrate detailed perspective views of
heating system 102 coupled to bathtub 104 in accordance with one or
more embodiments of the present technique. Heating system 102 may
include an intake 120, an outlet 122, and a heating/circulation
unit ("unit") 124. During use, bathing fluid 108 may flow from
bathing area 106 into unit 124 though intake 122, and may return to
bathing area 106 from unit 124 via outlet 122.
[0036] FIGS. 3A and 3B illustrate a rear-perspective view and a
rear view, respectively, of a heating system 102 coupled to bathtub
104 in accordance with one or more embodiments of the present
technique. In the illustrated embodiment, a cover is removed from
heating system 102 such that interior components of
heating/circulation unit 124 are visible. Heating/circulation unit
124 may include a heating device ("heater") 130 a fluid pump
("pump") 132, a control unit ("control") 134, and a power source
136. During use, relatively cooler bathing fluid 108a may be drawn
into inlet 120 of heating system 102 via pump 132, bathing fluid
108a pass through and be heated by heater 130 to generate
relatively warmer bathing fluid 108b that is returned via outlet
120.
[0037] Heater 130 may heat bathing fluid 108 as the fluid is
circulated through the heater. Heater 130 may include an in-line
fluid heater. Heater 130 may include an approximately 1500 watt
heating element. Heater 130 may provide a change in temperature of
about 8 degrees Fahrenheit (.degree. F.) as fluid flows through
heater 130. A relatively low temperature change may help to prevent
scalding the user with hot water as it exits outlet 122. Heater 130
may include a heater inlet 140 and a heater outlet 142. Outlet 142
may be located lower than inlet 140. Outlet 142 my be located at or
near a lowest portion of a fluid path through heater 130 such that
all or substantially all of bathing fluid 108 drains from heater
130 when circulation is stopped and/or bathing fluid drops below a
level of outlet 142 and/or outlet 122. Heater 130 may include an
inlet temperature sensor 144a and/or an outlet temperature sensor
144b. Temperature sensor 144a may detect a temperature of water
entering heater 130. Temperature sensor 144b may detect a
temperature of water exiting heater 130. Angle of orientation of
heater 130 may provide for purging/venting/bypass of air trapped in
an interior of heater 130. For example, air within heater may
travel upward through heater 130 due to gravity acting on the
bathing fluid, and the air may exit heater 130 via inlet 140. As
described herein, an angle of the fluid path may enable air to exit
system 102 via inlet 120. In some embodiments, heater 130 may
include a fluid path that encourages the flow of fluid to remove
trapped air from within heater 130. As depicted in FIG. 3C, heater
130 may include an upper fluid path 135a and a lower fluid path
135b in a chamber 137 about heating element 139. Upper fluid path
135a may be located at or near an uppermost region of chamber 137
such that as air accumulates the flow of fluid through fluid path
135a may draw the air or otherwise enable the air to flow out of
heater 130 via outlet 142 along with the fluid. Lower fluid path
135b may be provided to enable all or substantially all of the
bathing fluid to drain from chamber 137. During use, heater 130 may
be oriented as depicted such that upper fluid path 135a is at or
near an uppermost portion of chamber 137 such that air accumulating
at or near the uppermost portion of chamber 137 is drawn into the
fluid flown through upper path 135a.
[0038] Pump 132 may provide for the circulation of bathing fluid
108. Pump 132 may draw bathing fluid 108 through a pump inlet 156
and may expel fluid through pump outlet 158. In some embodiments,
pump 132 may include a small long life-life (50,000 hour) quiet
24-26 dBA at 2 ft direct current (DC) electronically commutated
spherical motor centrifugal pump. Pump 132 may contain only one
moving part: a magnetically driven rotor/impeller spinning on a
single ceramic bearing for quiet long life. Pump 132 may provides a
relatively low bathing fluid flow rate of about 1.2 gallons per
minute. A low flow rate may help to reduce a noise level during
operation and/or may provide a gentle stream of bathing fluid flow.
Pump 132 may be gravity primed. Pump 132 may have a low suction
pressure such that pump 132 is gravity primed. In some embodiments,
system 102 is arranged such that bathing fluid 108 is able to enter
from outlet 122 as a level of bathing fluid 108 increases within
bathtub 104, thereby enabling fluid to enter and prime pump 132
prior to bathing fluid reaching a level of intake 120. In some
embodiments, an upward angle of the fluid path through system 102
(e.g., intake 120 about outlet 122 without any significant loops or
curves for trapping air therein) enables purging of air through
intake 120 as the level of bathing fluid 108 increases and bathing
fluid 108 flows up though the fluid path via outlet 122. As
discussed in more detail below system 100 may employ techniques for
reducing and/or alleviating cavitation that may occur at pump 132.
Cavitation may be caused by air bubbles that are inadvertently
introduced into intake 120 (e.g., due to the water level being
below intake 120 and/or splashing or sloshing of bathing fluid
contained in bathtub 104).
[0039] Intake 120 may be located at a level above pump 132 (e.g.,
above intake 156). Pump 132 may be located at a level above heater
130 (e.g., above inlet 140). Heater 130 may be located above outlet
122. Pump 132 may be oriented substantially level or angled
downward from inlet 156 to outlet 158, heater 130 may be oriented
substantially level or angled downward from inlet 140 to outlet
142. Intake 120 may be coupled to inlet 156 of pump 132 via a
conduit (e.g., flexible or rigid hose/tube) 160. Outlet 158 of pump
132 may be coupled to inlet 140 of heater 130 via a conduit (e.g.,
flexible or rigid hose/tube) 162. Outlet 142 of heater 130 may be
coupled to outlet 122 via a conduit (e.g., flexible or rigid
hose/tube) 164. Conduit 160 may be substantially level or angled
downward from intake 120 to inlet 156 of pump 132. Conduit 162 may
be substantially level or angled downward from outlet 158 of pump
132 to inlet 140 of heater 130. Conduit 164 may be substantially
level or angled downward from outlet 142 of heater 130 to outlet
122. A level or downward angle of conduits 160, 162, and 164 may
facilitate the flow and drainage of water from conduits.
[0040] A fluid path 170 of system 102 may be defined by a path
through intake 120, conduit 160, pump 132, conduit 162, heater 130,
conduit 164 and outlet 122. In some embodiments, all or
substantially all of the portions of fluid path 170 may be
substantially level (e.g., horizontal) or angled downward (e.g.,
about one degree, five degrees, ten degrees, twenty degrees,
forty-five degrees, or more from level/horizontal). For example, as
depicted in FIG. 3B, each of the components are oriented in a
cascading fashion to encourage the flow of water from intake 120 to
outlet 122. Angluation of the components may encourage all or
substantially all of the water to drain from system 102 when a
level of bathing fluid falls (e.g., drops below a level of outlet
122). Location of pump 132 at or near intake 120 (e.g., above other
components) may enable pump to force water to drain through
downstream portions of fluid path 170. As described in more detail
below, outlet 122 may include a drainage port/hole located
substantially at a lowest point or portion of outlet 122 to
facilitate substantially all of bathing fluid 108 draining from
system 102.
[0041] System 102 may include a bathing fluid presence/level sensor
133. Sensor 133 may, detect the presence of bathing fluid within
fluid path 170 (e.g., within conduit 160). The presence of bathing
fluid within conduit 160 may be indicative of the bathing fluid
having a level equal to or greater than the level of conduit 160.
In some embodiments, sensor 133 may be placed at or near a level
corresponding to a depth of about four inches (10 cm) in bathing
area 106 of bathtub 104. Thus, sensor 133 may be capable of sensing
when bathing fluid reaches a level of about four inches (10 cm). In
some embodiments, one or more sensors may be provided at various
locations. For example a sensor 133 may be provided at or near
conduit 164 and/or outlet 122 to sense when bathing fluid 108 is
entering system 102.
[0042] Control 134 may provide for control of various aspects of
operation of system 102. Control 134 may regulate operation of pump
132 to control the flow of bathing fluid 108 there through, to
reduce or eliminate cavitation, and so forth. Control 134 may
regulate operation of heater 130 to heat applied to bathing fluid,
the purging of air, and so forth. Control 134 may monitor
conditions (e.g., temperature) of bathing fluid 108 in bathtub 104
and/or flowing through system 102. Control 134 may include one or
more sensing devices 134c for processing detected conditions (e.g.,
detecting a presence, level, temperature, and/or flow rate of
bathing fluid 108 In some embodiments, control 134 may include a
computer device configured to execute one or more software
routines. For example, control module may include a processor
device 134a and a memory 134b storing program instructions thereon
that are executable by processor device 134a to cause certain
operations of system 102 and 100. For example, program instructions
may include those for detecting/regulating/maintaining bathing
fluid at a temperature, for detecting and/or alleviating cavitation
conditions, and so forth. Memory 134b may include a non-transitory
computer readable storage medium comprising the program
instructions stored thereon.
[0043] Power source 136 may provide power for operation of system
102. For example, power source may provide power for pump 132,
heater 130, control 134, and so forth. Power source 136 may include
an alternating current (AC) to direct current (DC) converter. For
example, power source 136 may convert an incoming AC power to a 12
volt DC power provided to components of system 102.
[0044] FIGS. 4-14 include additional illustrations of heating
system 102. FIG. 4 illustrates a perspective view of heating system
102 in accordance with one or more embodiments of the present
technique. FIG. 5 illustrates a front view of heating system 102 in
accordance with one or more embodiments of the present technique.
FIG. 6 illustrates a left view of heating system 102 in accordance
with one or more embodiments of the present technique. FIG. 7
illustrates a right view of heating system 102 in accordance with
one or more embodiments of the present technique. FIG. 8
illustrates a right view including a cross-sectioned view of outlet
122 of heating system 102 in accordance with one or more
embodiments of the present technique. FIG. 9 illustrates a left
view including a cross-sectioned view of an intake 120 of heating
system 102 in accordance with one or more embodiments of the
present technique. FIGS. 10-12 illustrate detailed cross-sectioned
views of outlet 122 of heating system 102 in accordance with one or
more embodiments of the present technique. FIGS. 13 and 14
illustrate detailed cross-sectioned views of inlet 120 of heating
system 102 in accordance with one or more embodiments of the
present technique.
[0045] Intake 120 and/or outlet 122 may include an outer ring 200
and an inner ring 202. Outer ring 200 may include an externally
threaded potion 206 that is received by an internally threaded
portion 208 of inner ring 202. Outer ring 200 may be disposed at an
exterior surface of a bracket 209 of system 102 and be threaded
into inner ring 202 disposed at an interior surface of bracket 209
to capture/sandwich a portion of bracket 209 within a recess there
between.
[0046] Intake 120 and/or outlet 122 may include an opening 210 for
the passage of bathing fluid 108 into system 102. Opening 210 may
be in fluid communication with bathing area 106 and conduit 160. In
some embodiments, opening 210 may be oriented to provide a
substantially straight fluid path, as depicted in FIGS. 9 and 13.
Intake 120 and/or outlet 122 may include a nipple 220 that coupled
to an adjacent conduit (e.g., conduit 160 or 164). Nipple 220 may
include a first barbed end 220 for insertion into a conduit and
substantially spherical portion 224 at an opposite end. Spherical
portion 224 may be disposed in a complementary spherical recess 226
formed in an interior of outer ring 200 and/or inner ring 202 to
form a ball-and-socket type joint. Nipple 220 may be rotated (e.g.,
from about zero to about ten degrees) with respect to rings 200
and/or 202, as depicted in FIGS. 11 and 14. Rotation of nipple with
respect to rings 200 and/or 202 may facilitate an angle of a
conduit (e.g., conduit 160 or 164), facilitate an angle of a
bracket 109 relative to unit 124, conduit 160 and/or wall 112 of
bathtub 104. For example as depicted in FIGS. 11 and 14 intake 120
and/or outlet 122 may be angled relative to unit 124 such that a
distal baffle 230 is threaded into outer ring 200 to capture wall
112 in a recess 232 formed there between. Accordingly, intake 120
and/or outlet 122 may be coupled to an angle bathtub wall 112,
while being angled relative to unit 124 such that unit 124 may
remain substantially vertical. Unit 124 remaining substantially
vertical may ensure that a level or downward angle of fluid path
170 is maintained such that low sports that may encourage the
pooling of water within fluid path 170 are not present.
[0047] Threading of outer ring 200 into inner ring 202 may provide
compression between spherical portion 224 and recess 226 to secure
a position of rings 200 and 202 relative to nipple 220. In some
embodiments, an o-ring seal 240 is provided between recess 226 of
ring 200 and an external surface of spherical portion 224 to
facilitate fluid flow through opening 210 without leakage. An
o-ring seal 242 may be provided on an exterior of ring 200 to
inhibit leakage of fluid about intake 120 and/or outlet 122.
[0048] Intake 120 and/or outlet 122 may include baffle 230a/230b.
Baffle 230a/230b may include an externally threaded portion 250
that is received by an internally threaded portion 252 of outer
ring 200. Baffle 230a/230b may be disposed at an interior surface
110 of wall 112 of bathtub 104 and be threaded into outer ring 200
disposed at an exterior surface 114 of wall 112 to capture/sandwich
a portion of wall 112 within a recess 232 there between. Coupling
of inlet 120 and/or outlet 122 to wall 112 may couple system 102 to
bathtub 104. As depicted in FIG. 12, baffles 230a and/or 230b may
be threaded in/out (see arrow 231) to various depths to account for
varying thickness of walls 112 of bathtubs. For example, wall may
have a thickness of about 0.05 inches (1.27 mm) to about 0.5 inches
(12.7 mm). Wall 112 may have a thickness of about 0.09 inches
(2.286 mm), and recess 232 may have a corresponding width of about
0.09 inches (2.286 mm). In some embodiments, a distance between an
inserted end of baffle 230a/230b and an adjacent surface of outer
ring 202 may be minimized (e.g., maintained at less than about
0.035 inches (0.889 mm)) to reduce an area in which bathing fluid
108 may accumulate and, thus, not drain.
[0049] Outlet baffle 230b may diffuse the expulsion of bathing
fluid 108 from system 102. Diffusing of the bathing fluid 108 may
provide a substantially non-turbulent fluid flow that is not
substantially perceivable to a bather. For example, the diffusing
of bathing fluid flow may provide a tranquil/calm fluid flow, as
opposed to a jet type of fluid flow that may be expelled from
traditional nozzles.
[0050] In some embodiments, outlet baffle 230b expels bathing fluid
108 in a direction substantially parallel/tangential to an internal
surface 110 of wall 112 of bathtub 104. For example, as depicted in
FIG. 11, baffle 230b may expel bathing fluid 108 through lateral
ports 260 the direction of arrows 262. Lateral ports 260 may be
disposed about a lateral perimeter of baffle 230b. Baffle 230b may
include a plurality of ports 206 spaced about the lateral exterior
of baffle 230b. In some embodiments, baffles 230b may be evenly
spaced about a circumference of baffle 230b. Equal spacing may
facilitate an even distribution of bathing fluid 108 being
expelled. Baffle 230b may include a substantially solid central
portion 264. Central portion 264 may block some, a majority or all
of bathing fluid 108 from flow in a substantially straight
direction, thereby directing bathing fluid 108 in an approximately
ninety degree bend from opening 210 into and through lateral ports
260. Thus, during use bathing fluid 108 may enter baffle 230b at a
first direction (e.g., via opening 210), and may be redirected by
baffle 230b (e.g., by central portion 264) to a second direction
(e.g., though lateral ports 260) that is substantially
perpendicular to the first direction and/or substantially parallel
and/or tangential to interior surface 110 of wall 114 of bathtub
104.
[0051] Intake baffle 230a may provide for directing bathing fluid
108 from bating area 106 into intake 120 of system 102. Intake
baffle may include longitudinal ports 266 for directing intake of
bathing fluid 108, as depicted by arrows 268. In some embodiments,
intake baffle 230a may include a configuration that is the same or
similar to outlet baffle 230b (e.g., including lateral ports). In
some embodiments, outlet baffle 230b may include a configuration
that is the same or similar to inlet baffle 230b (e.g., including
vertical ports).
[0052] Outlet 122 may include a drainage port 280. Drainage port
280 may enable substantially all or all of bathing fluid 208 to be
drained from outlet 122 and/or system 102. Drainage port 280 may be
located at a lower portion of outlet 122 when assembled to bathtub
104. In some embodiments, outlet 122 may include a plurality of
drainage ports disposed about an exterior outlet 122 such that at
least one of the drainage ports is located at or near a lower
portion of outlet when assembled. In some embodiments drainage port
may include one of lateral ports 260 of baffle 230b.
[0053] FIG. 15 is a flow chart illustrating a method 500 of heating
and circulating bathing fluid (e.g., water) in accordance with one
or more embodiments of the present technique. In some embodiments,
method 500 generally includes a heating circulation system in a
standby state, monitoring a water level, and, when a sufficient
water level is detected, automatically activating the
heating/circulation system and, upon a sufficient amount of water
no longer being detected, returning to a system standby mode. In
some embodiments activating the heating/circulation system enables
operational routines for identifying and maintaining a desired
water temperature and/or identifying an addressing cavitation
issues.
[0054] Method 500 may include entering a heating/circulation system
standby state, as depicted at block 501. In some embodiments
entering a heating/circulation system standby state includes
heating/circulation system 102 entering a standby state. For
example, a user may plug-in or otherwise provider power to system
102 to provide enough power to enable system 102 to operate in a
standby state. In some embodiments, power is constantly provided
such that system 102 remains in at least a standby state at all
times. Maintaining such a standby state may enable automatic
activation of system 102 (e.g., upon detecting a sufficient level
of water in bathtub, as described herein) with little to no direct
user interaction with system 102. For example, a user may simply
fill the bathtub with water to active system 102, as described
below.
[0055] Method 500 may include monitoring a water level, as depicted
at block 504. Monitoring a water level may include polling a sensor
(e.g., sensing device 134c) to detect a presence and/or level of
water within a bathing area of a bathtub (e.g., bathing area 106 of
bathtub 104). In some embodiments, a sufficient presence/level of
water may be detected when the water (e.g., bathing fluid 108)
reaches a depth of about four inches (10 cm). If a sufficient
presence/level of water is not detected (as depicted at block 504),
the system may continue to monitor the water presence/level in a
standby state, as depicted. If a sufficient presence/level of water
is detected (as depicted at block 504), the system may enter an
active state, as depicted at block 506. For example, system 102 may
exit the standby mode such that system is capable of providing
desired bathing conditions for a user/bather. For example, in an
active state, system 102 may circulate and heat water within
bathtub 104 to maintain a calm and relaxing bathing
environment.
[0056] Method 500 may include identifying and maintaining a desired
water temperature, as depicted at block 508. In some embodiments,
identifying and maintaining a desired water temperature may include
automatically detecting a user's desired bathtub temperature (e.g.,
based on changes in bathing fluid temperature that exceed a
threshold amount) and controlling system 102 to provide a
sufficient level of heating and fluid circulation to maintain the
desired water temperature. In some embodiments, identifying and
maintaining a desired water temperature may include techniques
described in more detail with regard to method 600 of FIG. 16.
[0057] Method 500 may include identifying and addressing cavitation
issues, as depicted at block 510. In some embodiments, identifying
and addressing cavitation issues may include detecting that
cavitation of water is occurring within system 102 and/or
controlling operation of pump 132 to address/correct/remedy the
cavitation issue. In some embodiments, identifying and addressing
cavitation issues may include techniques described in more detail
with regard to method 700 of FIG. 17.
[0058] Method 500 may include monitoring a water level, as depicted
at block 512. Monitoring a water level may include polling a sensor
(e.g., sensing device 134c) to detect a presence and/or level of
water within a bathing area of a bathtub (e.g., bathing area 106 of
bathtub 104). In some embodiments, a sufficient presence/level of
water may be detected when the water (e.g., bathing fluid 108) has
a depth of at least about four inches (10 cm). If a sufficient
presence/level of water is not detected (as depicted at block 514),
the system may exit an active state and revert to a standby state,
as depicted. If a sufficient presence/level of water is detected
(as depicted at block 514), the system may remain in the active
state, as depicted at block 506. For example, system 102 may
maintain the active state such that system is capable of providing
desired bathing conditions for a user/bather. For example, system
102 may continue circulate and heat water within bathtub 104 to
maintain a calm and relaxing bathing environment (e.g., including
identifying and maintaining a desired water temperature and/or
identifying and addressing cavitation issues). Such monitoring
during the active state may ensure that system 102 returns to a
standby state upon a water level dropping inadvertently, upon a
user draining the bathtub, or the like. Returning to an inactive
state may reduce the likelihood of damage to components of system
102 (e.g., overheating of pump 132 and/or heater 130). Moreover,
returning to an inactive state may enable system to shut-off with
little to no user interaction. For example system 102 may return to
a stand-by state automatically upon the user draining water from
the bathtub.
[0059] In some embodiments, system 102 automatically turns
off/inactive if inlet or outlet nozzles are obstructed or clogged
(e.g., if water not detected or temperature of inlet or outlet of
heater 130 increasing above a threshold (greater than 115.degree.
F.).
[0060] It will be appreciated that method 500 is an exemplary
embodiment of a method employed in accordance with techniques
described herein. Method 500 may be may be modified to facilitate
variations of its implementations and uses. The order of method 500
may be changed, and various elements may be added, reordered,
combined, omitted, modified, etc. Method 500 may be implemented in
software, hardware, or a combination thereof. Some or all of method
500 may be implemented by processor 134a of controller 134.
Although method 500 has been described with respect to water, other
bathing fluids may be used.
[0061] FIG. 16 is a flow chart illustrating a method 600 of
maintaining bathing fluid at a desired temperature in accordance
with one or more embodiments of the present technique. In some
embodiments, method 600 generally include initially monitoring a
water temperature to identify an initial desired temperature,
checking that the water temperature is within an appropriate range
for heating, detecting the desired temperature, maintaining the
water at the desired temperature, continuing to monitor the water
temperature to identify a change in the desired temperature and,
upon detecting a change in the desired temperature, continuing the
cycle of identifying a desired temperature, maintaining the desired
temperature, monitoring the water temperature to identify a change
in the desired temperature, and so forth. In some embodiments
method 600 may include identifying and maintaining a desired water
temperature as described with respect to block 508 of method 500.
For example, upon a user filling a bathtub with sufficient water to
enter an active state (e.g., block 506), method 600 may be
initiated or otherwise employed by system 102.
[0062] Method 600 may include monitoring a water temperature, as
depicted at block 602. For example, upon entering active state and
initiating method 600, system 102 may initially enter into a
temperature monitoring mode to identify a desired temperate at
which to maintain the water within the bathtub. In some
embodiments, monitoring includes continually measuring the water
temperature (e.g., via temperature sensor 134c) until the water
temperature is within a temperature range appropriate or heating
and/or has reached as substantially constant level.
[0063] In some embodiments, heating of the water may be provided
only if the water temperature falls within a specified range. An
exemplary range may include greater than or equal to 90.degree. F.
and less than or equal to 104.degree. F. For example, the
temperature of the water may be monitored (without being heated)
until the detected temperature is greater than or equal to
90.degree. F. and less than or equal to 104.degree. F. (see block
603). Upon the detected temperature being greater than or equal to
90.degree. F. and less than or equal to 104.degree. F., a desired
temperature may be detected and/or the water may be heated via
circulation through heater 130.
[0064] A substantially constant level may be indicative of a user
having reached a desired bathtub temperature by adding/mixing cold
and hot water within bathtub 104. In some embodiments a
substantially constant level and, thus, a desired temperature 606,
may be detected when a rate of change of the temperature of the
bathing fluid falls below a specified/threshold rate of change
and/or the temperature has remained substantially constant for a
given amount of time. For example, where a threshold rate of change
is set to 1.degree. F. (degrees Fahrenheit) per minute (e.g.,
thereby requiring that the temperature does not change more than
1.degree. F. within a period of one-minute), and the water
temperature has climbed from a temperature of about 80.degree. F.
to a current temperature of 100.degree. F. within the first two
minutes of monitoring at a rate of 10.degree. F. per minute, and
has subsequently been held at about 100.degree. F. for one-minute
or more (e.g., with a rate of change of monitored temperature below
1.degree. F. per minute), the temperature of 100.degree. F. may be
identified as a desired temperature (see block 604). If a desired
temperature is not detected, the temperature of the water may be
continue to be monitored until a desired water temperature is
reached or system 102 is deactivated. For example, if the rate of
change of the temperature of the water continues to exceed the
specified threshold rate of change of 1.degree. F. per minute
(e.g., fluctuates in excess of the specified rate of change of
1.degree. F. per minute) system 102 may continue to monitor the
water temperature until a desired water temperature is reached or
system 102 is deactivated.
[0065] Method 600 may include maintaining the water at desired
temperature 606, as depicted at block 608. For example, system 102
may operate to maintain water in bathtub 102 at the identified
desired temperature of 100.degree. F. Maintaining the water at the
desired temperature 606 may include circulating the water though
system 102 along flow path 170 via operation of pump 132 and/or
operating heater 130 to heat the water as it is passed there
through. In some embodiments, for example, pump 132 and heater 130
are activated to circulate water at a rate of about five gallons
per minute. Water may be expelled through lateral ports 260 of
baffle 230b such that water is gently disbursed into the bathing
environment in a path substantially parallel to an interior surface
110 of the bathtub 104. Such disbursement may provide fluid flow
that is substantially less intrusive to a bather (e.g., less
turbulent and/or less noisy) than fluid flow generated by a jet or
similar style of nozzle. In some embodiments, the temperature of
the water is continuously monitored. Fluid circulation rates and/or
heating intensity may be adjusted to maintain the water at desired
temperature 606. In some embodiments, heating of the water is
provided in accordance with a control algorithm. For example, more
heat may be applied the greater the variance of the water
temperature from the desired temperature.
[0066] Method 600 may include monitoring the water temperature to
identify a change in the desired temperature, as depicted at block
610. For example, upon detecting and/or maintaining the water at
desired temperature 606, system 102 may continue to monitor the
temperature of the water to detect a change in the desired
temperature. In some embodiments, monitoring includes continually
measuring the water temperature (e.g., via temperature sensor 134c)
to detect a change in the water temperature that exceeds
temperature change threshold. In some embodiments, if a change
temperature of the water exceeds a specified temperature change
threshold, a change in the desired temperature may be detected.
Upon detecting a change in the desired temperature, the water
temperature may be monitored to identify the "new" desired
temperature, ad depicted at block 612 and 602. For example, upon
detecting a change in the desired temperature, system 102 may again
monitor the water temperature to detect the "new" desired
temperature. For example, system 102 may continue to measure the
water temperature (e.g., via temperature sensor 134c) until the
water temperature has reached as substantially constant level, as
described above with respect to block 602. Thus, upon detecting a
change in the desired temperature, system 102 may continue the
cycle of identifying a desired temperature, maintaining the desired
temperature, monitoring the water temperature to identify a change
in the desired temperature, and so forth.
[0067] If the a change in the desired temperature is not detected
(e.g., if the temperature change does not exceed at temperature
change threshold), system 102 may continue to maintain the water at
the current desired temperature and continue to monitor the water
temperature to identify a change in the desired temperature, as
depicted at block 612.
[0068] In some embodiments, the temperature change threshold may
include an absolute difference in temperature. For example, if the
temperature change threshold is set at 1.degree. F., and the
temperature of the water fluctuates (e.g., increase or decreases)
by about 0.4.degree. F. from the desired temperature (e.g., the
temperature fluctuates between about 99.6.degree. F. and
100.4.degree. F. when the desired temperature is 100.degree. F.),
no change in the desired temperature may be detected, and, thus,
the current desired temperature (e.g., 100.degree. F.) may be
maintained by system 102. If, however, the temperature change
threshold is set at 1.degree. F. degrees, and the temperature of
the water fluid fluctuates by more than 1.degree. F. from the
set-point temperature (e.g., below 99.degree. F. or above
101.degree. F. when the desired temperature is 100.degree. F.), a
change in temperature may be detected, and system 102 may continue
the cycle of identifying a desired temperature, maintaining the
desired temperature, monitoring the water temperature to identify a
change in the desired temperature, and so forth.
[0069] In some embodiments, the temperature change threshold may
include a rate of change of temperature. For example, if the
temperature change threshold is set at 1.degree. F. per minute, and
the temperature of the water changes (e.g., increase or decreases)
by less than about 0.4.degree. F. per minute (e.g., the temperature
changed from about 100.degree. F. to 100.4.degree. F. within one
minute), no change in the desired temperature may be detected, and,
thus, the current desired temperature (e.g., 100.degree. F.) may be
maintained by system 102. If, however, the temperature change
threshold is set at 1.degree. F. per minute, and the temperature of
the water fluid changes by more than 1.degree. F. degrees in a
period of one minute, (e.g., the temperature changed from about
100.degree. F. to 100.6.degree. F. within one minute), a change in
temperature may be detected, and system 102 may continue the cycle
of identifying a desired temperature, maintaining the desired
temperature, monitoring the water temperature to identify a change
in the desired temperature, and so forth.
[0070] In some embodiments, a change in the water temperature may
be attributed to a user/bather adding and/or removing water from a
bathtub. Thus, to set a new desired temperature, a user/bather may
simply add/drain water from a bathtub. For example, where a user
would like the water to be warmer, the user may simply add enough
water to the bathtub to increase the temperature by a sufficient
amount to exceed the specified threshold. System 102 may
automatically detect this change, thereby identifying the user's
desire to change the temperature of the bath water, and may
automatically maintain the bath water at the "new" desired
temperature. Notably, the user may be able to set the desired
temperature without having to provide any input to a user interface
(e.g., keypad, dial or knob).
[0071] In some embodiments, system 102 may no longer
maintain/monitor the water at the desired temperature if the water
level falls below a threshold level, the system 102 is turned
off/disabled, and/or the system 102 is set to a standby state. For
example, system 102 may returns to a standby state upon a water
level dropping inadvertently, upon a user draining the bathtub, or
the like, as discussed with regard to block 514 of method 500.
[0072] It will be appreciated that method 600 is an exemplary
embodiment of a method employed in accordance with techniques
described herein. Method 600 may be may be modified to facilitate
variations of its implementations and uses. The order of method 600
may be changed, and various elements may be added, reordered,
combined, omitted, modified, etc. Method 600 may be implemented in
software, hardware, or a combination thereof. Some or all of method
600 may be implemented by processor 134a of controller 134.
Although method 600 has been described with respect to water, other
bathing fluids may be used.
[0073] FIG. 17 is a flow chart illustrating a method 700 of
identifying and addressing cavitation issues in accordance with one
or more embodiments of the present technique. In some embodiments,
method 700 generally includes identifying cavitation of water in
fluid path 170 and correcting the cavitation issue. In some
embodiments method 700 may include identifying and addressing
cavitation issues as described with respect to block 510 of method
500. For example, upon a user filling a bathtub with sufficient
water to enter an active state (e.g., block 506), method 700 may be
initiated or otherwise employed by system 102.
[0074] Method 700 may include detecting cavitation of water in a
fluid path, as depicted at block 702. For example cavitation may be
detected at pump 132 or elsewhere within path 170. In some
embodiments, cavitation is automatically detected by measuring pump
power consumption and identifying a significant drop in power
consumption indicative of a cavitation condition. In some
embodiments, cavitation is automatically detected by monitoring
water temperature. Due to cavitation decreasing water flow though
fluid path 170, cavitation may be identified where a temperature at
an outlet of heater 130 exceeds specified temperature threshold
(e.g., absolute temperature or rate of change), and/or a difference
in the water temperature inlet 120 and outlet 122 exceeding a
specified temperature threshold. In some embodiments, cavitation is
automatically detected based on increased vibration or noise/sound
emitted from pump 132.
[0075] Method 700 may include correcting cavitation, as depicted at
block 704. In some embodiments, when cavitation is detected system
102 (e.g., processor 134a) automatically turns off pump 132 for a
given time interval (e.g., about 3-10 seconds). This may allow
trapped air in pump 132 or other portions of system 102 (e.g., path
170) to flow up and out of intake 120 via the pressure of gravity
such that the air is replaced by water. Pump 132 may, then turned
back on with the cavitation being corrected. If cavitation is still
present then the cavitation identification process will repeat and
pump 132 will again be turned off for another time interval. The
subsequent time interval may be longer than the preceding time
interval. This process may be continued until the cavitation is
corrected or the water present sensor indicates there is not water
in the system which may be the case when the user has drained
bathtub 104.
[0076] It will be appreciated that method 700 is an exemplary
embodiment of a method employed in accordance with techniques
described herein. Method 700 may be may be modified to facilitate
variations of its implementations and uses. The order of method 700
may be changed, and various elements may be added, reordered,
combined, omitted, modified, etc. Method 700 may be implemented in
software, hardware, or a combination thereof. Some or all of method
700 may be implemented by processor 134a of controller 134.
Although method 700 has been described with respect to water, other
bathing fluids may be used.
[0077] Further modifications and alternative embodiments of various
aspects of the invention will be apparent to those skilled in the
art in view of this description. Accordingly, this description is
to be construed as illustrative only and is for the purpose of
teaching those skilled in the art the general manner of carrying
out the invention. It is to be understood that the forms of the
invention shown and described herein are to be taken as examples of
embodiments. Elements and materials may be substituted for those
illustrated and described herein, parts and processes may be
reversed or omitted, and certain features of the invention may be
utilized independently, all as would be apparent to one skilled in
the art after having the benefit of this description of the
invention. Changes may be made in the elements described herein
without departing from the spirit and scope of the invention as
described in the following claims. Furthermore, note that the word
"may" is used throughout this application in a permissive sense
(i.e., having the potential to, being able to), not a mandatory
sense (i.e., must). The term "include", and derivations thereof,
mean "including, but not limited to". As used throughout this
application, the singular forms "a", "an" and "the" include plural
referents unless the content clearly indicates otherwise. Thus, for
example, reference to "a sensor" includes a combination of two or
more sensors. The term "coupled" means "directly or indirectly
connected".
[0078] In this patent, certain U.S. patents, U.S. patent
applications, and other materials (e.g., articles) have been
incorporated by reference. The text of such U.S. patents, U.S.
patent applications, and other materials is, however, only
incorporated by reference to the extent that no conflict exists
between such text and the other statements and drawings set forth
herein. In the event of such conflict, then any such conflicting
text in such incorporated by reference U.S. patents, U.S. patent
applications, and other materials is specifically not incorporated
by reference in this patent.
* * * * *