U.S. patent application number 14/470161 was filed with the patent office on 2015-03-05 for programmable drain pump.
This patent application is currently assigned to PHOENIX MANUFACTURING, INC.. The applicant listed for this patent is Gary Stephen Jouas, John Patrick Koponen. Invention is credited to Gary Stephen Jouas, John Patrick Koponen.
Application Number | 20150059376 14/470161 |
Document ID | / |
Family ID | 52581249 |
Filed Date | 2015-03-05 |
United States Patent
Application |
20150059376 |
Kind Code |
A1 |
Jouas; Gary Stephen ; et
al. |
March 5, 2015 |
PROGRAMMABLE DRAIN PUMP
Abstract
Evaporative cooler apparatus includes two pumps, a primary pump
which pumps water to an evaporative medium and a secondary pump for
pumping water from the bottom of the cooler to drain the water
reservoir of the cooler. The secondary, or drain pump includes a
programmable timer that is operable by a user to select a run time
duration for the pump motor from a plurality of possible run times.
The programmable drain pump also includes a user control for
selection of an off-state time from a plurality of available
off-state times or intervals between run times of the drain pump
motor. The programmable drain pump also includes a constant on
control and a test control.
Inventors: |
Jouas; Gary Stephen;
(Phoenix, AZ) ; Koponen; John Patrick; (Chandler,
AZ) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Jouas; Gary Stephen
Koponen; John Patrick |
Phoenix
Chandler |
AZ
AZ |
US
US |
|
|
Assignee: |
PHOENIX MANUFACTURING, INC.
Phoenix
AZ
|
Family ID: |
52581249 |
Appl. No.: |
14/470161 |
Filed: |
August 27, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61871798 |
Aug 29, 2013 |
|
|
|
Current U.S.
Class: |
62/157 ;
62/304 |
Current CPC
Class: |
F24F 11/62 20180101;
F24F 11/61 20180101; F24F 2006/046 20130101; F24F 11/52 20180101;
F24F 11/30 20180101; F24F 5/0035 20130101 |
Class at
Publication: |
62/157 ;
62/304 |
International
Class: |
F24F 5/00 20060101
F24F005/00; F24F 11/00 20060101 F24F011/00 |
Claims
1. An evaporative cooler pump apparatus, comprising: a shaft; a
motor connected to the shaft for rotating the shaft; an impeller
secured to the shaft remote from the motor for pumping water; a
housing for enclosing the motor and the impeller; a programmable
processor in operable communication with the motor, the processor
including programming configured to selectively control the
operation of the motor between, a constant-on mode, whereby the
motor is turned on and runs indefinitely, and an intermittent run
mode, whereby the motor continuously alternates between an on-state
in which the motor is turned on for a first period of time, and an
off-state in which the motor is turned off for a second period of
time.
2. The apparatus of claim 1, further comprising: a user control
operable by a user for selection of an off-state period of time
from a plurality of mutually different off-state periods of time
available for selection.
3. The apparatus of claim 1, further comprising: a user control
operable by the user for selection of an on-state period of time
from a plurality of mutually different on-state periods of time
available for selection.
4. The apparatus of claim 3, wherein the user control for on-state
periods of time is a first user control, and further comprising: a
second user control operable by a user for selection of an
off-state period of time from a plurality of mutually different
off-state periods of time available for selection.
5. An evaporative cooler apparatus, comprising: an evaporative
cooler housing, including a bottom wall, a side wall extending
upwardly from the bottom wall, a top wall secured to the side wall,
a water reservoir, and an evaporative medium secured to the side
wall; a water supply connected for providing water to the
evaporative cooler housing; a drain pipe connected for draining
water from the evaporative cooler housing; a first pump operative
for pumping water from the water reservoir to the evaporative
medium; a second pump operative for pumping water from the water
reservoir to the drain pipe, the second pump including a
programmable processor in operable communication with a motor of
the second pump, the processor including programming configured to
selectively control the operation of the motor between a
constant-on mode, whereby the motor is turned on and runs
indefinitely, and a drain mode, whereby the motor continuously
alternates between an on-state, in which the motor is turned on for
a first period of time, and an off-state in which the motor is
turned off for a second period of time.
6. The apparatus of claim 5, further comprising: a user control
operable by a user for selection of an off-state period of time
from a plurality of mutually different off-state periods of time
available for selection.
7. The apparatus of claim 5, further comprising: a user control
operable by the user for selection of an on-state period of time
from a plurality of mutually different on-state periods of time
available for selection.
8. The apparatus of claim 7, wherein the user control for on-state
periods of time is a first user control, and further comprising: a
second user control operable by a user for selection of an
off-state period of time from a plurality of mutually different
off-state periods of time available for selection.
9. An evaporative cooler pump apparatus, comprising in combination:
a shaft; a motor connected to the shaft for rotating the shaft; an
impeller secured to the shaft remote from the motor for pumping
water; a housing for enclosing the motor and the impeller; a
programmable processor in operable communication with the motor,
the processor including programming configured to selectively
control the operation of the motor in an intermittent run mode,
whereby the motor alternates between an on-state in which the motor
is turned on for a first period of time, and an off-state in which
the motor is turned off for a second period of time; a first user
control operable by a user for selection of an off-state period of
time from a plurality of mutually different off-state periods of
time available for selection; and a second user control operable by
a user for selection of an off-state period of time from a
plurality of mutually different off-state periods of time available
for selection.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of U.S. Provisional
Patent Application Ser. No. 61/871,798, filed Aug. 29, 2013, which
is incorporated herein by reference.
FIELD
[0002] This disclosure relates to an evaporative cooler apparatus
and, more particularly to a programmable drain pump for use with
evaporative coolers in which a primary pump is used to supply water
to an evaporative medium, and a secondary drain pump is used to
drain the water pan of the evaporative cooler.
BACKGROUND
[0003] Evaporative cooler pumps have been known for many years.
Typically, a single pump is used in an evaporative cooler to
provide water for soaking an evaporative medium through which air
is forced. The air is cooled evaporatively by giving up the latent
heat of evaporation to the water in the evaporative medium.
[0004] An inherent problem with evaporative cooler pumps of the
prior art is their limitation of pumping efficiently when the water
level in the pan at the bottom of the evaporative cooler drops
below a certain amount, which is typically an inch or so. As the
water level decreases, there is cavitation caused by the pump
design, namely the impeller of the pump, and the pump loses
efficiency. Air is introduced into the stream of pumped water due
to impeller cavitation, and the flow rate efficiency of the pump
drops substantially. This is particularly important when the
purpose of the pump is to evacuate the reservoir.
[0005] The evaporative cooler pump of certain embodiments includes
an impeller design which greatly enhances the pumping flow rate
efficiency by decreasing the cavitation and accordingly allowing
the water level to drop substantially below that which is usable in
the prior pumps, and still pumping efficiently without air bubbles
in the pump water line.
[0006] A second feature of the pump apparatus of the present
invention is the utilization of a secondary pump to periodically
drain the evaporative cooler.
[0007] To decrease the dissolved solids (or salts) content of water
used by evaporative coolers, a bleed system has been utilized by
which a portion of the pumped water is continually bled off and
drained out of the evaporative cooler. This requires the continual
addition of new water to the evaporative cooler on a regular basis
to replace the water that has bled off. The introduction of the
fresh make-up water decreases the salt concentration content of the
water in the cooler sump.
[0008] Since some of the water pumped to the evaporative medium
drains down and returns to the sump, or bottom, of the evaporative
cooler, that water includes the salts originally present in the
water, and the buildup of salts in the cooler, and on the
evaporative medium, causes a loss of efficiency of the evaporative
medium and a buildup of the salts in the evaporative cooler housing
itself The continuous bleed-off of the water requires the
introduction of fresh water to help decrease the salinity
concentration. On the other hand, the continuous bleed-off wastes a
substantial amount of water.
[0009] A secondary pump, a drain pump, in the evaporative cooler
apparatus of certain embodiments substantially decreases the waste
of the water, such as heretofore bled off, by periodically draining
the sump or bottom portion of the evaporative cooler housing, thus
allowing for the introduction of fresh water on a periodic basis.
This provides at least two advantages. The first advantage is the
use of less water than the prior continual bleed systems, and a
decrease in the salinity of the water due to the replenishment of
the water on a regular basis.
[0010] A timer is used to actuate the drain pump on a regular
basis. The salt or mineral buildup decreases, and the periodic
changing of the water prevents a buildup or accumulation of
stagnant water, and accordingly, there is a substantial decrease
possibility of the breeding of mosquitoes in the evaporative
cooler.
SUMMARY
[0011] The invention described and claimed herein comprises
evaporative cooler apparatus in which a pair of evaporative cooler
pumps is connected together. A primary, supply pump is used to
provide water for the evaporative medium in the evaporative cooler.
A secondary pump is used as a drain pump to periodically drain the
water from the bottom of the evaporative cooler. The water is then
replenished in the normal manner, such as by means of a float
control valve. The pumps include impellers which allow the pumps to
function efficiently in water depths as low as about a quarter of
an inch or so without appreciable loss in flow rate. The impellers
include vanes on both the bottom and the top of an impeller disk.
The impeller design substantially increases the efficiency of the
pumping process. A drain adapter is utilized to allow a drain pipe
in the housing of the cooler apparatus to also be connected to the
drain pump. The above-mentioned drain adapter also ensures the
presence of an air gap to act as an anti-siphon protection.
[0012] In one aspect of the invention, the drain pump is a
programmable drain pump having two modes of operation: a constant
run mode wherein the drain pump continuously and indefinitely is in
an on state and pumping water; and an alternating on/off, or
intermittent run mode, whereby the motor turns on for a first
programmed period of time and then turns off for a second
programmed period of time, and then repeats the cycle.
[0013] Among the objects of certain embodiments of the present
invention are the following: [0014] To provide a new and useful
evaporative cooler apparatus; [0015] To provide a new and useful
evaporative cooler pump apparatus; [0016] To provide a pair of
pumps in an evaporative cooler; [0017] To provide a new and useful
evaporative cooler pump apparatus having a high efficiency impeller
for pumping in relatively low water level; [0018] To provide a new
and useful drain adapter for an evaporative cooler; [0019] To
provide an evaporative cooler pump apparatus having a primary pump
for supplying water to an evaporative medium and a secondary pump
for draining the water in the evaporative cooler on a periodic
basis; and [0020] To provide a new and useful high efficiency
evaporative cooler apparatus utilizing two pumps.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present invention is described in detail below with
reference to the attached drawing figures, wherein:
[0022] FIG. 1 is a perspective view of an evaporative cooler such
as may include a programmable drain pump of the present invention,
showing the pump in its use environment;
[0023] FIG. 2 is a perspective view of a drain pump which may be a
programmable drain pump of the present invention;
[0024] FIG. 3 is an exploded perspective view of a lower portion of
the drain pump apparatus of FIG. 2;
[0025] FIG. 4 is a side view in partial section of a lower portion
of the drain pump apparatus of FIG. 2;
[0026] FIG. 5 is a bottom plan view of an impeller portion of the
drain pump apparatus of FIG. 2;
[0027] FIG. 6 is a view in partial section taken generally along
line 6-6 of the impeller of FIG. 5;
[0028] FIG. 7 is a top plan view of the impeller of FIG. 5;
[0029] FIG. 8 is a perspective view of a drain adapter portion of
the apparatus of FIG. 2;
[0030] FIG. 9 is a side view in partial section illustrating the
drain adapter apparatus of FIG. 8 in its use environment;
[0031] FIG. 10 is a top, right side perspective view of an
embodiment of a programmable drain pump;
[0032] FIG. 11 is a top, front perspective view of the programmable
drain pump of FIG. 10;
[0033] FIG. 12 is a top, left side view showing the top panel of
the programmable drain pump of FIG. 10;
[0034] FIG. 13 is a top isometric view of an embodiment of the
programmable drain pump, showing a pump control panel on a top
surface of the programmable drain pump, as disclosed herein;
[0035] FIG. 14 is a cross section view of the programmable drain
pump of FIG. 13, showing the internal components thereof, as
disclosed herein; and
[0036] FIGS. 15A and 15B are the two parts of a circuit diagram of
the programmable circuit for an embodiment of the programmable
drain pump as disclosed herein.
DETAILED DESCRIPTION
[0037] FIG. 1 is a perspective view of evaporative cooler apparatus
10, which comprises the use environment of an evaporative cooler
pump apparatus 70 and a programmable drain pump apparatus 100 of
the present invention. The pumps 70 and 100 are shown disposed
within an evaporative cooler housing 12, and on a bottom wall 14
thereof. The housing 12 also includes a pair of side walls 16 and
20, a back wall 24, and a front wall, not shown, and a top wall 34.
The side walls 16 and 20 both include openings, and appropriate
panels are disposed in the openings, and evaporative medium is in
turn secured to panels in the openings. In FIG. 1, the evaporative
medium 18 is shown disposed within the opening of the side wall 16.
An opening 26 is shown extending through the back wall 24. The
opening 26 may likewise include an appropriate panel for holding an
evaporative medium.
[0038] Within the housing 12 is a blower housing 40. A blower or
fan disposed within the housing 40 provides the air flow into the
interior of the housing 12 through the evaporative medium pads and
into the structure to which the evaporative cooler apparatus 10 is
secured.
[0039] An electric outlet 50 is shown secured to the blower housing
40. A conductor 52 extends from the outlet 50 outwardly, as is well
known and understood in the art.
[0040] A water input conduit 60 is shown extending to the side wall
16. The conduit 60 is appropriately connected to a valve 62. The
valve 62 is controlled by a float 64. As the water level within the
bottom of the housing 12 decreases, the float 64 opens the valve 62
to replenish the water supply. Such is well known and understood by
those of skill in this art.
[0041] Two pumps, a primary or supply pump 70, and a secondary or
drain pump 100, are shown disposed on the bottom wall 14 of the
housing 12. The secondary or drain pump 100 is programmable as will
be discussed in further detail hereinafter. A water conduit 72
extends from the supply pump 70 upwardly to a water distribution
manifold or spider which in turn carries the water to the
evaporative medium pads 18.
[0042] The secondary or drain pump 100 is connected to a drain
conduit 102.
[0043] The conduit 102 extends and is connected to the drain
adapter 200, indicated at 204 in FIG. 1, at a first end thereof,
which adapter 200 is then connected at a second opposite end to an
overflow pipe 190 which is appropriately secured to and extends
through the bottom wall 14 to allow the water pumped by the pump
100 to drain from the housing 12.
[0044] An electrical cord 104 extends to a combination plug and
receptacle 106. The plug portion of the plug receptacle 106 is
appropriately connected to the outlet 50. The cord 74 and its plug
76 are in turn connected to the receptacle portion of the plug
receptacle 106. The two pumps 70 and 100 accordingly require only a
single outlet or receptacle for their operation.
[0045] The supply pump 70 and the drain pump 100 are similar to
each other. In one embodiment, the primary difference between them
is a timer unit 180 in the drain pump 100 that may not be present
in the supply pump. This will be discussed in detail below.
However, in an alternate embodiment, the drain pump may be a
programmable drain pump with increased programmable
functionality.
[0046] FIG. 2 is a perspective view, partially broken away, of the
drain pump 100 illustrating its electrical elements, including a
timer 180. The conduit 102 (see FIGS. 1 and 9) extends from an
outlet 116 of the drain pump 100 to a drain pipe 190 for draining
water from the bottom of the cooler housing 12, as discussed above
and as will be discussed in detail below.
[0047] Details of the drain pump 100 are illustrated in FIGS. 2, 3,
and 4. FIG. 3 is a bottom perspective view of the drain pump
apparatus 100 particularly illustrating features of a pump impeller
associated with both the supply pump 70 and the drain pump 100.
FIG. 4 is a side view in partial section of the lower portion of
the drain pump apparatus 100, specifically illustrating the
impeller portion of the pump. For the following discussion,
reference will primarily be made to FIGS. 2, 3, and 4.
[0048] The drain pump apparatus 100 includes a motor housing 110 in
which is disposed an electrical motor 140. Beneath the motor
housing 110 is a shaft housing 112. A motor shaft 142 extends from
the motor 140 downwardly through the shaft housing 112 to an
impeller 150. Located on the motor shaft 142 partially down within
the shaft housing 112 is a "slinger" (not shown). The slinger is a
disc-shaped washer concentrically affixed about the motor shaft
142, and located a short distance (e.g. 3-inches) above the
impeller 150, which location is also a short distance (e.g.
0.5-inches) above the normal water level in the sump/reservoir. The
slinger is configured to rotate with, and form a liquid tight seal
around the circumference of, the motor shaft so that any water that
may migrate up the motor shaft 142 during operation of the pump is
prevented from migrating past the slinger. When water reaches the
slinger, it contacts the flat bottom surface of the slinger and is
redirected outward along the bottom surface thereof, and toward the
outer edge of the slinger. As the water moves toward the outer edge
of the rotating slinger, due to the action of centrifugal force,
the water picks up speed as it moves further to the outer edge of
the slinger, where the migrating water is finally slung off of the
slinger and motor shaft 142. Beneath the shaft housing 112 is an
impeller housing 114. The shaft 142 extends into the impeller
housing 114. The impeller 150 is secured to the bottom of the shaft
142 within the housing 114.
[0049] Above the motor 140, and secured to the upper portion of the
shaft 142, is a fan 144. The fan 144 provides a cooling flow of air
for the motor 140 and the timer 180.
[0050] The motor housing 110 is closed by a cap 126.
[0051] At the bottom of the shaft housing 112 is a base 130. The
base 130 extends outwardly to provide a relatively sturdy base
support for the motor housing 110, the shaft housing 112, and the
various elements associated with the apparatus. Extending
downwardly from the base 130 is a plurality of feet 132. The feet
132 are spaced apart to allow water to flow between the feet and
within the base 130 and to the impeller housing 114.
[0052] The outlet 116 extends from the impeller housing 114. The
drain conduit 102 is connected to the outlet 116. From the outlet
116, the conduit 102 extends to a drain hose adapter 200. The
adapter 200 will be discussed in detail below in conjunction with
FIGS. 8 and 9.
[0053] The impeller housing 114 comprises a generally relatively
short cylinder in which is disposed the impeller 150. The housing
114 includes an apertured top wall 118 and an apertured bottom
plate 120. Water flows into the impeller housing 114 through the
apertured bottom plate 120.
[0054] Details of the impeller 150 are shown in FIGS. 5, 6, and 7,
in addition to FIGS. 3 and 4.
[0055] FIG. 5 is a plan view of the bottom of the impeller 150.
FIG. 6 is a view in partial section of the impeller 150 taken
generally along line 6-6 of FIG. 5. FIG. 7 is a plan view of the
top of the impeller 150. For the following discussion of the
impeller 150, reference will primarily be made to FIGS. 5, 6, and
7, in addition to FIGS. 3 and 4.
[0056] The impeller 150 comprises a relatively thin and generally
circular disk 152. The disk 152 includes an outer periphery 154.
The disk 152 also includes a bottom surface 156 and a top surface
166.
[0057] Disposed about the center of the disk 152, and extending
outwardly from the bottom surface of the disk 152 is a shaft boss
158. A bore 160 extend through the shaft boss 158. The bore 160
receives the shaft 142 of the motor 140, as best shown in FIGS. 3
and 4.
[0058] Extending radially outwardly from the shaft boss 158 at the
center of the disk 152 is a plurality of vanes 162. As illustrated
in FIG. 5, the vanes 162 are spaced apart equally a relatively few
degrees, in comparison with contemporary pump impellers. Ten vanes
162 are shown in FIG. 5 spaced apart equally from each other in the
illustrated example. The distal tips or outer ends of the vanes 162
terminate inwardly from the outer periphery 154 of the disk
152.
[0059] The configuration of the vanes 162 is best shown in FIG. 6.
The "upper" or "outer" surface of each vane 162 is farthest from
the bottom surface 156 adjacent to the boss 158 and are closest to
the surface 156 remote from the boss 158. In other words, the
"height" of the vanes 162 tapers generally toward the surface 156
outwardly from the center portion of the disk 152.
[0060] On the top surface 166 are shown four vanes 168. The vanes
168 extend upwardly a relatively short distance from the top
surface 166, and they extend radially inwardly from the outer
periphery 154 of the disk 152. The vanes 168 terminate radially
outwardly from the center portion of the disk 152. Moreover, as
best shown in FIG. 7, the configuration of the vanes 168 is
generally rectangular.
[0061] The vanes 168 on the top 166 of the impeller 150 help to
prevent water from being pushed up through the aperture in top wall
118 of the impeller housing 114.
[0062] The disk 152 helps to prevent cavitation and accordingly
allows the pump apparatus 100 to efficiently pump in water down to
a depth of about a quarter of an inch Or so.
[0063] Returning again to FIG. 2, within the cap 126, and disposed
above the motor 140, is the timer 180. The timer 180 in the drain
pump 100 in certain embodiments works in conjunction with the
supply pump 70 so that after a predetermined cumulative time period
of the on operation in the primary supply pump 70, the timer 180
causes the motor 140 in the drain pump 100 to turn on, thus pumping
the water from the bottom of the evaporative cooler housing 12
upwardly from the housing. The timer 180 in the drain pump 100 is
preset so that it operates for a predetermined number of minutes
before turning off.
[0064] For example, for every twelve hours of cumulative operation
of the supply pump 70, the timer 180 in the drain pump 100 will
cause the drain pump 100 to operate for a short period of time,
such as seven minutes. During the seven minute time period that the
drain pump 100 operates, the water in the bottom of the evaporative
cooler housing 12 is effectively drained down to a minimum amount
in the bottom of the cooler apparatus 10. At the same time, the
demand for the water in the cooler apparatus 10 caused by the float
64 and the valve 62 causes fresh water to flow into the housing 12.
The fresh water replenishes the water supply that had been drained
off by the drain pump 100, and thus fresh water flows into the
housing, substantially completely replacing the water in the
housing 12 on a periodic basis.
[0065] It is apparent from the foregoing that when the water is
pumped from the housing 12 by the drain pump apparatus 100, the
float 64 will cause fresh water to flow into the evaporative cooler
housing 12, thus diluting any old water that remains in the
housing, such as any old water that has not been pumped out. The
pump configuration ensures that most of the old water is pumped out
and replaced by fresh water that is brought into the housing
12.
[0066] FIG. 8 is a perspective side view of a drain adapter 200
useable with the drain pump 100 and the evaporative cooler
apparatus 10 and particularly with the bottom 14 of the housing 12.
FIG. 9 is a side view in partial section showing the adapter 200
secured to the overflow and drain pipe 190 and to the conduit 102.
For the following discussion, reference will primarily be made to
FIGS. 1, 8, and 9.
[0067] As indicated above, the overflow and drain pipe 190 is
appropriately secured to and extends through the bottom 14 of the
housing 12. In prior art evaporative coolers, an overflow pipe
serves as a safety feature for draining overflow water out of a
cooler housing. In the apparatus of the present invention, the pipe
190 also serves as a drain pipe when the drain pump 100 is "on" for
draining the housing 12.
[0068] To allow both functions to be accomplished by the pipe 190,
the drain adapter 200 is used to connect the conduit 102 to the
pipe 190. The adapter 200 is "open" so that overflow water may
drain through the pipe 190. This opening also acts as an air gap
providing an anti-siphon safety function. Water pumped through the
conduit 102 flows downwardly along the adapter 200 to the pipe
190.
[0069] The adapter 200 comprises an elongated "X" configured or
cross-shaped element, with outwardly extending tabs 204 centrally
located along the length of the element. The element 200 includes
four elongated arms. Phrased in another manner, two arm portions
preferably bisect each other at right angles, defining a four armed
element. The arms extend outwardly from a central longitudinal axis
of the adapter.
[0070] The width or effective diameter of the element 200 above and
below the tabs 204 is essentially the same as the inner diameter of
the drain pipe 190 and as the inner diameter of the conduit 102. As
shown in FIG. 9, the inner diameters of the pipe 190 and the
conduit 102 are substantially the same.
[0071] The tabs 204 extend outwardly from the arm of the element
200. The outwardly extending tabs 204 have a greater width or
diameter, which width or diameter is preferably at least the same
as the outer diameter of the pipe 190 to allow the adapter 200 to
be comfortably disposed in and on the pipe 190.
[0072] The "height" of the tabs 204 is sufficient to allow overflow
water to flow into the pipe 190 between a top rim 192 of the pipe
190 and the bottom of the conduit 102 without problems of air flow
or surface tension. Overflow water from the bottom of the housing
12 flows into the pipe 190 between the outwardly extending tabs 204
and the arms of the adapter element 200. The tabs 204 are simply
extensions of the aims which comprise the element 200.
[0073] The tabs 204 essentially divide the arms of the adapter 200
into two portions, an upper portion 202 and a lower portion
206.
[0074] As shown in FIG. 9, the bottoms of the tabs 204 are disposed
on the top rim 192 of the pipe 190. The upper arm portion 202 of
the adapter 200 extends upwardly into the conduit 102, and the
bottom arm portion 206 extends downwardly into the pipe 190 from
the tabs 204.
[0075] An alternate embodiment of the adapter 200 is also
illustrated in FIG. 8. In dash dot line is shown an arm 210. The
use of the arm 210, with two of the four arms shown for the
apparatus 200, comprises a three armed adapter. Preferably, the
arms of the adapters are spaced apart from each other equal arcuate
distances. The arms of the three armed embodiment are disposed
apart an equal arcuate distance, providing a one hundred twenty
degree separation, as opposed to a ninety degree separation for the
arms of the four armed adapter 200.
[0076] In the three armed adapter, each arm has the same
configuration as the arms illustrated for the four armed adapter
200, with tabs extending outwardly from the arms to be disposed on
the top rim of the drain or overflow pipe. The three arms extend
outwardly from a central longitudinal axis.
[0077] The evaporative cooler apparatus 10 shown in FIG. 1 is
illustrated as being generally rectangular or square, but it will
be understood that other configurations, such as round, may also be
used.
[0078] While the principles of the invention have been made clear
in illustrative embodiments, there will be immediately obvious to
those skilled in the art many modifications of structure,
arrangement, proportions, the elements, materials, and components
used in the practice of the invention, and otherwise, which are
particularly adapted to specific environments and operative
requirements without departing from those principles. The appended
claims are intended to cover and embrace any and all such
modifications, within the limits only of the true spirit and scope
of the invention.
[0079] As previously disclosed above herein, in one embodiment the
drain pump 100 includes a timer, such as a mechanical timer, that
turns the motor of the drain pump 100 on after a predetermined
permanently fixed length of cumulative run-time of the supply pump
70 (e.g. every twenty-four hours). However, referring to FIGS.
10-15, in an alternate embodiment the drain pump is a fully
programmable drain pump 300. In use, the programmable pump 300
typically operates in a cycle, or alternating periods when the pump
motor 140 is in an "on" state, so as to pump water to the drain
pipe 190, and periods when the motor is in an "off" state, and no
water is being pumped by the drain pump 300.
[0080] The programmable drain pump 300 of this alternate embodiment
comprises the same mechanical components as previously disclosed
above for the drain pump 100, but also further includes
programmable control circuitry that includes a processor having
programming configured to control the operation of the pump between
the two alternating "on" and "off" states. Specifically, in one
embodiment, the processor is configured to switch the pump between
each of the two "on" and "off" states in an alternating manner for
specified periods of time. The user specified input to the
processor is in the form of setting a timer corresponding to each
of the "on" and "off" states. A first timer is set for the "run
time" of the motor, which specifies the length of time that the
motor is to be operated in the "on" state, following the expiration
of a specified period when the motor was previously in an "off"
state. A second timer is set for the "clean frequency," which
specifies the length of time that the motor is to be turned to an
"off" state between successive periods when the motor is "on." The
control circuitry allows a user to specify or input both the run
time and the clean frequency and thereby control alternating
operation of the programmable pump 300 between an "on" and an "off"
state.
[0081] To permit the input of both the clean frequency and run
time, the programmable drain pump 300 further includes a control
panel 310 disposed in a wall of the pump housing, such as for
example, the top surface of the cap 126 of the pump housing, for
specifying the user selectable run time and clean frequency values
(typically in increments of minutes or hours) for the pump 300.
[0082] In one embodiment, the clean frequency may be inputted by
selecting one length of time from four pre-defined discreet lengths
of time, such as for example two hours, four hours, six hours, or
eight hours of "off" time for the programmable pump 300. The time
period selected for the clean frequency will be the amount of time
that the pump is turned "off" between successive periods when the
pump is in an "on" state and pumping water to the drain pipe. While
the clean frequency of the present exemplary embodiment is
selectable from only four options (two hours, four hours, six
hours, or eight hours of "off" time for the pump), in alternate
embodiments, the programmable drain pump 300 may include more or
less than four options for the clean frequency selection, and the
actual time periods for the clean frequency may be the same or
different than those previously disclosed herein without departing
from the scope of the present disclosure.
[0083] In one embodiment, the run time, or length of time that the
pump is "on," may be inputted by selecting from one of two discreet
pre-programmed periods of time, such as for example a period of
5-minutes or a period of 9-minutes. The time period selected for
the run time will be the amount of time that the pump is turned
"on" between successive periods when the pump is in an "off" state
and no pumping is being performed. While the run time of the
present exemplary embodiment is selectable between only two options
(5-minutes and 9-minutes of "on" time for the pump), in alternate
embodiments, the programmable drain pump 300 may include more or
fewer than two options for the run time selection, and the actual
time periods for the run time may be the same or different than
those previously disclosed herein without departing from the scope
of the present disclosure.
[0084] The run time may be selected by pressing a run time select
button 320 in the control panel 310, which will highlight the
specific labeled run time that has been selected, by lighting a
corresponding light, LED, or other such similar indicator 322
positioned adjacent the label 324 for the chosen run time on the
control panel 310. The illustrated example provides run time
selections of 5 minutes and 9 minutes, although other run times may
be provided and more or fewer run time options may be provided.
[0085] The clean frequency may be selected in a similar manner by
pressing a clean frequency select button 330 in the control panel
310. As the clean frequency selection button 330 is selected,
respective clean frequency selections are indicated by indicator
lights 332, for example, which are identified by indicia 334 marked
on the control panel 310. Each press of either the run time select
button 320 or the clean frequency select button 330 will toggle the
indicator associated with the respective button from one
highlighted run time, or clean frequency, selection option to the
next un-highlighted selection option. Once the indicator
corresponding to the desired run time or clean frequency is
highlighted, the indicated run time or clean frequency is
respectively selected in the processor of the programmable drain
pump.
[0086] Referring to FIG. 11, as an example, if the run time
selection button 320 is pressed until the indicator light 322
corresponding to the five minute run time is highlighting as
indicated by the "5 Min." indicia, and the clean frequency
selection button 330 is pressed until the indicator light 336 is
highlighted corresponding to the clean frequency time of "4 Hrs.",
then in operation, the programmable pump 300 will alternate between
being in the "on" state for 5 minutes, during which time the pump
300 is pumping water to the drain pipe 200, followed by 4 hours in
the "off" state, where the pump is turned off and not pumping any
water. The cycle then repeats indefinitely until the pump is
reprogrammed or the cycle is interrupted.
[0087] Turning to FIG. 12, the programmable drain pump 300 also
includes on the control panel 310 a constant on button 312 that may
be selected by a user to keep the pump constantly on, such as
during a cleaning or flushing operation. In addition, a test button
314 is provided to enable the user to test whether the programmable
drain pump 300 is operational, for example, for the duration of the
selected run time without having to wait for the clean frequency
time to elapse.
[0088] The illustrated example permits user selection of either
five minute or nine minute run times at intervals of two hours,
four hours, six hours, or eight hours, as shown on the control
panel 310. Of course, other run time durations may be available in
other embodiments and other clean frequency intervals may be
provided as options for user selection. More or fewer options may
be provided in alternative embodiments.
[0089] In still further alternate embodiments (not shown), either
of the run time or clean frequency may be infinitely, or nearly
infinitely, variable, and inputted by a user entering the desired
run time or clean frequency into the control circuitry with a
numeric keypad, or changing the run time or clean frequency with
"up" or "down" buttons that respectively and incrementally or
continuously increase or decrease the particular time periods. In
such embodiments, a display or digital readout would show the
numerical length of time or other indicator that has been input to
the processor. For example, a desired run time of 17 minutes would
be inputted to the programmable drain pump by either keying in "1"
"7" on a keypad, or pushing the "up" or "down" buttons for the run
time until the number 17 is displayed on the display or readout.
The selected indicator may instead refer to a hardness of the
water, humidity in the air, or other condition or
characteristic.
[0090] The programmable drain pump 300 may include the "constant
on" selection button 312 that, when depressed, instructs the
processor of the programmable pump to leave the motor of the
programmable pump in the "on" state for an indefinite period of
time, continuously pumping water, until the button is again
depressed. This mode of operation is the constant on mode, and is
useful, for example, if the programmable drain pump 300 must be
used as a supply pump to supply water to the evaporative media of
the evaporative cooler in the event that the primary supply pump 70
breaks down. The evaporative cooler will then not need to be shut
down completely while the user procures a replacement supply pump.
A subsequent depressing of the "constant on" button 312 will cease
the operation of the pump 300 in the "constant on" mode and return
the pump to operating in an alternating "on"/"off" mode where it is
used as a drain pump as disclosed above.
[0091] In one embodiment, such a programmable drain pump 300 as
disclosed herein may be configured to only be operational and
tracking the clean frequency and run time of the drain pump 300
while the evaporative cooler is generating cool air. This means
that the drain pump 300 is only operational when the recirculation
pump 70 is simultaneously turned "on" and actively pumping water to
the evaporative medium of the evaporative cooler. Therefore, in
such an embodiment, the processor of the programmable drain pump
300 is also only tracking the length(s) of time that the drain pump
300 is in either of the "on" or "off" states while the
recirculation pump 70 is also in an "on" state and pumping water to
the evaporative medium. The supply pump 70 and the drain pump 300
are connected to one another either directly or indirectly to
permit detecting of the supply pump operation by the drain
pump.
[0092] For example, if the clean frequency on the programmable
drain pump 300 is set to 2-hours (i.e. meaning 2-hours will pass
between the end of one cleaning cycle and the beginning of the next
cleaning cycle), and the recirculating pump 70 shuts down after
1-hour, the processor of the drain pump 300 will track/log the
first hour of the drain pump's 300 "off" time, but will detect
through the connection to the supply pump that the supply pump is
off and will track no additional time until the recirculating pump
70 is again turned back "on" and pumping water. Once the
recirculating pump 70 is turned back on, the processor of the
programmable drain pump 300 will resume tracking time for the
cleaning frequency until a total of 2-hours of cumulative time has
elapsed, per the selected clean frequency period, after which the
programmable drain pump 300 will then be turned "on" so as to
operate to pump water to the drain pipe for the selected run
time.
[0093] In alternate embodiments, the programmable drain pump 300
may be configured to track "on" and "off" time for each of the
respective run time and clean frequency of the drain pump
independently from the operation of the recirculating pump 70
without departing from the scope of the present disclosure.
[0094] Furthermore, in addition, the processor of the programmable
drain pump 300 may be configured to track different time periods
than those disclosed herein, such as for example, the length of
time between the beginning of one cleaning cycle and the beginning
of the next cleaning cycle (as opposed to the length of time
between the end of one cleaning cycle and the beginning of the next
cleaning cycle), without departing from the scope of the present
disclosure.
[0095] Accordingly, there is disclosed herein a programmable drain
pump for use in a dual pump evaporative cooling system, wherein the
drain pump includes programming to permit adjustment of the run
time and clean frequency of the drain pump and provide automatic
operation of the drain pump at the selected intervals. This permits
a user to set up customized cleaning schedules for an evaporative
cooler, depending on the specific environmental factors in which
the evaporative cooling system will operate. In addition, the
programmable drain pump as disclosed herein may be used as a
recirculation pump to allow for continuous operation of the
evaporative cooler in the event that the primary recirculation pump
breaks down. Accordingly, no run time of the evaporative cooling
system is lost while the broken primary recirculating pump is
repaired or replaced.
[0096] FIG. 13 shows the programmable pump 300 with the user
operable buttons on the control panel 310. The programmable drain
pump is configured to fit into the cooling apparatus. In FIG. 14,
the pump has a printed circuit board 370 mounted within the pump
housing. The printed circuit board 370 includes a processor and
associated circuitry so as to be operable to perform the functions
described herein. The user input to the programmable drain pump 300
is provided by controls, such as the button 312 that is mounted on
an upper printed circuit board positioned beneath the control panel
310. A rubber seal is provided over the button 312 to keep water
out of the electronics. A lower rubber seal 372 is provided below
the circuit board 370 to prevent water from encroaching on the
electronics from below. As noted above, the programmable pump 300
has a motor 140 that drives the impeller 150 via the shaft 142 and
has a fan 144 for cooling the motor 140.
[0097] FIGS. 15A and 15B show a circuit 380 according to certain
embodiments. The circuit 380 includes power conversion circuitry
381 and rectifying and filtering circuitry 382, switches 384 for
user input of commands relating to continuous operation, run time
selection, and clean interval time selection, and indicator LEDs
386 for continuous operation, 2 hour interval, 4 hour interval, 6
hour interval, 8 hour interval, 5 minute run time, and 9 minute run
time. A microcontroller processor chip HR6P60HL is connected in the
circuit for automated operation of the motor based on the user
selection via the switches 384. A memory chip, such as a 24C04
chip, is connected to store the user settings. A test switch 388 is
provided to test the operation of the drain pump. The illustrated
circuit is but one example of a programmable circuit for operating
the programmable drain pump.
[0098] Although other modifications and changes may be suggested by
those skilled in the art, it is the intention of the inventors to
embody within the patent warranted hereon all changes and
modifications as reasonably and properly come within the scope of
their contribution to the art.
* * * * *