U.S. patent application number 15/338395 was filed with the patent office on 2018-05-03 for dispenser for a laundry treating household appliance having a float diverter.
The applicant listed for this patent is INDESIT COMPANY S.P.A., WHIRLPOOL CORPORATION. Invention is credited to PRAKASH AMTE, ANDREA CESARONI, MAURO MANCINI, MARCOS JAVIER RIOS.
Application Number | 20180119328 15/338395 |
Document ID | / |
Family ID | 60186191 |
Filed Date | 2018-05-03 |
United States Patent
Application |
20180119328 |
Kind Code |
A1 |
AMTE; PRAKASH ; et
al. |
May 3, 2018 |
DISPENSER FOR A LAUNDRY TREATING HOUSEHOLD APPLIANCE HAVING A FLOAT
DIVERTER
Abstract
A treating chemistry dispenser for a household appliance
includes at least first and second treating chemistry reservoirs
and a distributor selectively supplying liquid to the first and
second reservoirs. The distributor includes a liquid supply circuit
having a first branch fluidly coupled to the first treating
chemistry reservoir and a second branch fluidly coupled to the
second treating chemistry reservoir. A first float diverter is
located within the supply circuit.
Inventors: |
AMTE; PRAKASH; (WAGHOLI,
IN) ; MANCINI; MAURO; (FABRIANO, IT) ; RIOS;
MARCOS JAVIER; (MONTERREY, MX) ; CESARONI;
ANDREA; (JESI, IT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
WHIRLPOOL CORPORATION
INDESIT COMPANY S.P.A. |
BENTON HARBOR
FABRIANO |
MI |
US
IT |
|
|
Family ID: |
60186191 |
Appl. No.: |
15/338395 |
Filed: |
October 30, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D06F 35/006 20130101;
D06F 39/083 20130101; D06F 39/02 20130101; D06F 39/028
20130101 |
International
Class: |
D06F 39/02 20060101
D06F039/02; D06F 35/00 20060101 D06F035/00 |
Claims
1. A treating chemistry dispenser for a household appliance
comprising: at least first and second treating chemistry
reservoirs; a distributor selectively supplying liquid to the first
and second reservoirs comprising: a liquid supply circuit having a
first branch fluidly coupled to the first treating chemistry
reservoir, and a second branch fluidly coupled to the second
treating chemistry reservoir; and a first float diverter located
within the supply circuit and operable between a first position,
where the liquid is supplied to the first branch, and a second
position where liquid is supplied to the second branch.
2. The treating chemistry dispenser of claim 1 further comprising a
third chemistry reservoir, a third branch, and a second float
diverter operable between a first position, where the liquid is
supplied to at least one of the first and second branches, and a
second position, where the liquid is supplied to the third
branch.
3. The treating chemistry dispenser of claim 2 wherein the second
float diverter is located in the supply circuit upstream of the
first float diverter.
4. The treating chemistry dispenser of claim 1 wherein the first
position corresponds to a non-floating position for the first float
diverter.
5. The treating chemistry dispenser of claim 1 wherein the second
position corresponds to a floating position for the first float
diverter.
6. The treating chemistry dispenser of claim 1 wherein the
distributor comprises a float chamber fluidly coupled to the supply
circuit and the first float diverter resides in the float
chamber.
7. The treating chemistry dispenser of claim 6 wherein the supply
circuit comprises a backflow portion fluidly coupled to the float
chamber whereby liquid in the supply circuit will backflow into the
float chamber upon the cessation of the supplying of liquid to the
supply circuit.
8. The treating chemistry dispenser of claim 6 wherein the float
chamber comprises a drain opening.
9. The treating chemistry dispenser of claim 8 wherein the drain
opening is sized such that the liquid drain rate through the drain
opening is less than the liquid supply rate through the supply
circuit.
10. The treating chemistry dispenser of claim 9 wherein the liquid
drain rate is not greater than half of the liquid supply rate.
11. The treating chemistry dispenser of claim 6 comprising an index
fixing the position of the first float diverter within the float
chamber.
12. The treating chemistry dispenser of claim 11 wherein the index
comprises cooperating structural features on the first float
diverter and the float chamber.
13. The treating chemistry dispenser of claim 1 wherein the first
float diverter further comprises at least one flow control
channel.
14. The treating chemistry dispenser of claim 13 wherein the flow
control channel is on one of a top or side of the first float
diverter.
15. The treating chemistry dispenser of claim 14 wherein the flow
control channel is located on a side of the first float diverter
and confronts the supply circuit when the first float is in the
second position.
16. The treating chemistry dispenser of claim 15 wherein the flow
control channel is aligned with the second branch in the second
position.
17. A method of supplying liquid between first and second branches
of a supply circuit in a dispenser for a household appliance, the
method comprising: floating a float diverter from a non-floating to
a floating position to block flow to one of the first or second
branches while permitting flow to the other of the first or second
branches.
18. The method of claim 17 wherein the floating of the float
diverter comprises back-flowing liquid in the supply circuit to
float the float diverter.
19. The method of claim 18 wherein the back-flowing comprises
back-flowing the liquid into a float chamber in which the float
diverter resides.
20. The method of claim 19 wherein the back-flowing comprises
reducing the flow of liquid in the supply circuit.
21. The method of claim 20 wherein reducing the flow of liquid in
the supply circuit comprises shutting off the supply of liquid to
the supply circuit.
22. The method of claim 21 further comprising draining liquid from
the float chamber
23. The method of claim 22 wherein the draining liquid from the
float chamber comprises draining the liquid at a rate slower than
the rate of liquid supplied through the supply circuit.
Description
BACKGROUND
[0001] Laundry treating household appliances, such as washing
machines, refreshers, and non-aqueous systems, can have a
configuration based on a rotating drum that at least partially
defines a treating chamber in which laundry items are placed for
treating. The laundry treating household appliance can have a
controller that implements a number of user-selectable,
pre-programmed cycles of operation having one or more operating
parameters. Hot water, cold water, or a mixture thereof, along with
various treating chemistries, can be supplied to the treating
chamber in accordance with the cycle of operation. The laundry
treating household appliance can have a dispenser for loading of
treating chemistries into the appliance by the user and for
supplying various treating chemistries to the treating chamber.
BRIEF SUMMARY
[0002] In one aspect, illustrative embodiments in accordance with
the present disclosure relate to a treating chemistry dispenser for
a household appliance including at least first and second treating
chemistry reservoirs and a distributor selectively supplying liquid
to the first and second reservoirs. The distributor includes a
liquid supply circuit having a first branch fluidly coupled to the
first treating chemistry reservoir and a second branch fluidly
coupled to the second treating chemistry reservoir. A first float
diverter is located within the supply circuit and operable between
a first position, where the liquid is supplied to the first branch,
and a second position where liquid is supplied to the second
branch.
[0003] In another aspect, illustrative embodiments in accordance
with the present disclosure relate to a method of supplying liquid
between first and second branches of a supply circuit in a
dispenser for a household appliance. The method includes floating a
float diverter from a non-floating to a floating position to block
flow to one of the first or second branches while permitting flow
to the other of the first or second branches.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] In the drawings:
[0005] FIG. 1 illustrates a schematic cross-sectional view of a
laundry treating household appliance in the form of a washing
machine according to an embodiment of the present disclosure.
[0006] FIG. 2 illustrates a schematic of a control system of the
laundry treating household appliance of FIG. 1 according to an
embodiment of the present disclosure.
[0007] FIG. 3 illustrates an exploded view of a treating chemistry
dispenser that can be included in the laundry treating household
appliance of FIG. 1 according to an embodiment of the present
disclosure.
[0008] FIG. 4A illustrates a top view of the treating chemistry
dispenser of FIG. 3 with first and second float diverters in
non-floating positions according to an embodiment of the present
disclosure.
[0009] FIG. 4B illustrates a cross-sectional view of the treating
chemistry dispenser of FIG. 4A along line IV B according to an
embodiment of the present disclosure.
[0010] FIG. 5A illustrates a top view of the treating chemistry
dispenser of FIG. 3 with the first float diverter in a floating
position according to an embodiment of the present disclosure.
[0011] FIG. 5B illustrates a cross-sectional view of the treating
chemistry dispenser of FIG. 5A along line V B according to an
embodiment of the present disclosure.
[0012] FIG. 6A illustrates a top view of the treating chemistry
dispenser of FIG. 3 with the second float diverter in a floating
position according to an embodiment of the present disclosure.
[0013] FIG. 6B illustrates a cross-sectional view of the treating
chemistry dispenser of FIG. 6A along line VI B according to an
embodiment of the present disclosure.
[0014] FIG. 7A illustrates a top perspective view of the first or
second float diverter according to an embodiment of the present
disclosure.
[0015] FIG. 7B illustrates a sectional view along line VII C of the
float diverter of FIG. 7A according to an embodiment of the present
disclosure.
[0016] FIG. 7C illustrates a bottom view of the float diverter of
FIG. 7A according to an embodiment of the present disclosure.
[0017] FIG. 8 illustrates a cross-sectional side view of the first
and second float diverters in non-floating positions as in FIG.
4A.
DETAILED DESCRIPTION
[0018] Laundry treating household appliances can be provided with
treating chemistry dispensers. Such treating chemistry dispensers
can have a plurality of reservoirs for containing different types
of treating chemistries, non-limiting examples of which include a
detergent, a fabric softener, or a bleaching agent. Providing the
structures and mechanisms for selectively providing liquid to each
reservoir individually can require the use of additional space
within the treating chemistry dispenser, as well as additional
manufacturing costs. The use of a distributor with at least one
float diverter in accordance with the present disclosure enables
efficient use of space within the treating chemistry dispenser and
eliminates the need for additional actuators to selectively provide
liquid to a desired reservoir of the treating chemistry dispenser.
In one aspect, this is achieved by providing first and second float
diverters being shaped such that liquid is selectively directed to
flow in a straight flow path or a diverted flow path.
[0019] FIG. 1 is a schematic cross-sectional view of a laundry
treating household appliance according to an embodiment of the
present disclosure. The laundry treating household appliance can be
any appliance which performs an automatic cycle of operation to
clean or otherwise treat items placed therein, non-limiting
examples of which include a horizontal or vertical axis clothes
washer; a combination washing machine and dryer; a tumbling or
stationary refreshing/revitalizing machine; an extractor; a
non-aqueous washing apparatus; and a revitalizing machine.
[0020] The laundry treating household appliance of FIG. 1 is
illustrated as a horizontal axis washing machine 10, which can
include a structural support system comprising a cabinet 12 which
defines a housing within which a laundry holding system resides.
The cabinet 12 can be a housing having a chassis and/or a frame, to
which decorative panels can or cannot be mounted, defining an
interior enclosing components typically found in a conventional
washing machine, such as motors, pumps, fluid lines, controls,
sensors, transducers, and the like. Such components will not be
described further herein except as necessary for a complete
understanding of the present disclosure.
[0021] The laundry holding system comprises a tub 14 dynamically
suspended within the structural support system of the cabinet 12 by
a suitable suspension system 28 and a drum 16 provided within the
tub 14, the drum 16 defining at least a portion of a laundry
treating chamber 18. The drum 16 can include a plurality of
perforations 20 such that liquid can flow between the tub 14 and
the drum 16 through the perforations 20. A plurality of baffles 22
can be disposed on an inner surface of the drum 16 to lift the
laundry load received in the treating chamber 18 while the drum 16
rotates. It is also within the scope of the present disclosure for
the laundry holding system to comprise only one receptacle with the
receptacle defining the laundry treating chamber for receiving the
load to be treated.
[0022] The laundry holding system can further include a door 24
which can be movably mounted to the cabinet 12 to selectively close
both the tub 14 and the drum 16. A bellows 26 can couple an open
face of the tub 14 with the cabinet 12, with the door 24 sealing
against the bellows 26 when the door 24 closes the tub 14.
[0023] The washing machine 10 can further include a liquid supply
system for supplying water to the washing machine 10 for use in
treating laundry during a cycle of operation. The liquid supply
system can include a source of water, such as a household water
supply 40, which can include separate valves 42 and 44 for
controlling the flow of hot and cold water, respectively. Water can
be supplied through an inlet conduit 46 directly to the tub 14 by
controlling first and second diverter mechanisms 48 and 50,
respectively. The diverter mechanisms 48, 50 can be a diverter
valve having two outlets such that the diverter mechanisms 48, 50
can selectively direct a flow of liquid to one or both of two flow
paths. Water from the household water supply 40 can flow through
the inlet conduit 46 to the first diverter mechanism 48 which can
direct the flow of liquid to a supply conduit 52. The second
diverter mechanism 50 on the supply conduit 52 can direct the flow
of liquid to a tub outlet conduit 54 which can be provided with a
spray nozzle 56 configured to spray the flow of liquid into the tub
14. In this manner, water from the household water supply 40 can be
supplied directly to the tub 14. While the valves 42, 44 and the
conduit 46 are illustrated exteriorly of the cabinet 12, it will be
understood that these components can be internal to the cabinet
12.
[0024] The washing machine 10 can also be provided with a
dispensing system for dispensing treating chemistry to the treating
chamber 18 for use in treating the laundry according to a cycle of
operation. The dispensing system can include a treating chemistry
dispenser 62 which can be a single dose dispenser, a bulk
dispenser, or an integrated single dose and bulk dispenser and is
fluidly coupled to the treating chamber 18. The treating chemistry
dispenser 62 can be configured to dispense a treating chemistry
directly to the tub 14 or mixed with water from the liquid supply
system through a dispensing outlet conduit 64. The dispensing
outlet conduit 64 can include a dispensing nozzle 66 configured to
dispense the treating chemistry into the tub 14 in a desired
pattern and under a desired amount of pressure. For example, the
dispensing nozzle 66 can be configured to dispense a flow or stream
of treating chemistry into the tub 14 by gravity, i.e. a
non-pressurized stream. Water can be supplied to the treating
chemistry dispenser 62 from the supply conduit 52 by directing the
diverter mechanism 50 to direct the flow of water to a dispensing
supply conduit 68.
[0025] The treating chemistry dispenser 62 can include multiple
chambers or reservoirs for receiving doses of different treating
chemistries. The treating chemistry dispenser 62 can be implemented
as a dispensing drawer that is slidably received within the cabinet
12, or within a separate dispenser housing 106 (FIG. 3), which can
be provided in the cabinet 12. The treating chemistry dispenser 62
can be moveable between a fill position, where the treating
chemistry dispenser 62 is exterior to the cabinet 12 and can be
filled with treating chemistry, and a dispense position, where the
treating chemistry dispenser 62 are interior of the cabinet 12.
Although the dispensing system described herein includes the
treating chemistry dispenser 62 and the separate dispenser housing
106, it will be understood that the treating chemistry dispenser 62
and dispenser housing 106 could be integrated together.
[0026] Non-limiting examples of treating chemistries that can be
dispensed by the dispensing system during a cycle of operation
include one or more of the following: water, enzymes, fragrances,
stiffness/sizing agents, wrinkle releasers/reducers, softeners,
antistatic or electrostatic agents, stain repellants, water
repellants, energy reduction/extraction aids, antibacterial agents,
medicinal agents, vitamins, moisturizers, shrinkage inhibitors, and
color fidelity agents, and combinations thereof.
[0027] The washing machine 10 can also include a recirculation and
drain system for recirculating liquid within the laundry holding
system and draining liquid from the washing machine 10. Liquid
supplied to the tub 14 through tub outlet conduit 54 and/or the
dispensing supply conduit 68 typically enters a space between the
tub 14 and the drum 16 and can flow by gravity to a sump 70 formed
in part by a lower portion of the tub 14. The sump 70 can also be
formed by a sump conduit 72 that can fluidly couple the lower
portion of the tub 14 to a pump 74. The pump 74 can direct liquid
to a drain conduit 76, which can drain the liquid from the washing
machine 10, or to a recirculation conduit 78, which can terminate
at a recirculation inlet 80. The recirculation inlet 80 can direct
the liquid from the recirculation conduit 78 into the drum 16. The
recirculation inlet 80 can introduce the liquid into the drum 16 in
any suitable manner, such as by spraying, dripping, or providing a
steady flow of liquid. In this manner, liquid provided to the tub
14, with or without treating chemistry can be recirculated into the
treating chamber 18 for treating the laundry within.
[0028] The liquid supply and/or recirculation and drain system can
be provided with a heating system which can include one or more
devices for heating laundry and/or liquid supplied to the tub 14,
such as a steam generator 82 and/or a sump heater 84. Liquid from
the household water supply 40 can be provided to the steam
generator 82 through the inlet conduit 46 by controlling the first
diverter mechanism 48 to direct the flow of liquid to a steam
supply conduit 86. Steam generated by the steam generator 82 can be
supplied to the tub 14 through a steam outlet conduit 87. The steam
generator 82 can be any suitable type of steam generator such as a
flow through steam generator or a tank-type steam generator.
Alternatively, the sump heater 84 can be used to generate steam in
place of or in addition to the steam generator 82. In addition or
alternatively to generating steam, the steam generator 82 and/or
sump heater 84 can be used to heat the laundry and/or liquid within
the tub 14 as part of a cycle of operation.
[0029] It is noted that the illustrated suspension system, liquid
supply system, recirculation and drain system, and dispensing
system are shown for exemplary purposes only and are not limited to
the systems shown in the drawings and described above. For example,
the liquid supply, dispensing, and recirculation and pump systems
can differ from the configuration shown in FIG. 1, such as by
inclusion of other valves, conduits, treating chemistry dispensers,
sensors, such as water level sensors and temperature sensors, and
the like, to control the flow of liquid through the washing machine
10 and for the introduction of more than one type of treating
chemistry. For example, the liquid supply system can include a
single valve for controlling the flow of water from the household
water source. In another example, the recirculation and pump system
can include two separate pumps for recirculation and draining,
instead of the single pump as previously described.
[0030] The washing machine 10 also includes a drive system for
rotating the drum 16 within the tub 14. The drive system can
include a motor 88, which can be directly coupled with the drum 16
through a drive shaft 90 to rotate the drum 16 about a rotational
axis during a cycle of operation. The motor 88 can be a brushless
permanent magnet (BPM) motor having a stator 92 and a rotor 94.
Alternately, the motor 88 can be coupled to the drum 16 through a
belt and a drive shaft to rotate the drum 16, as is known in the
art. Other motors, such as an induction motor or a permanent split
capacitor (PSC) motor, can also be used. The motor 88 can rotate
the drum 16 at various speeds in either rotational direction.
[0031] The washing machine 10 also includes a control system for
controlling the operation of the washing machine 10 to implement
one or more cycles of operation. The control system can include a
controller 96 located within the cabinet 12 and a user interface 98
that is operably coupled with the controller 96. The user interface
98 can include one or more knobs, dials, switches, displays, touch
screens and the like for communicating with the user, such as to
receive input and provide output. The user can enter different
types of information including, without limitation, cycle selection
and cycle parameters, such as cycle options.
[0032] The controller 96 can include the machine controller and any
additional controllers provided for controlling any of the
components of the washing machine 10. For example, the controller
96 can include the machine controller and a motor controller. Many
known types of controllers can be used for the controller 96. It is
contemplated that the controller is a microprocessor-based
controller that implements control software and sends/receives one
or more electrical signals to/from each of the various working
components to effect the control software. As an example,
proportional control (P), proportional integral control (PI), and
proportional derivative control (PD), or a combination thereof, a
proportional integral derivative control (PID control), can be used
to control the various components.
[0033] As illustrated in FIG. 2, the controller 96 can be provided
with a memory 100 and a central processing unit (CPU) 102. The
memory 100 can be used for storing the control software that is
executed by the CPU 102 in completing a cycle of operation using
the washing machine 10 and any additional software. Examples,
without limitation, of cycles of operation include: wash, heavy
duty wash, delicate wash, quick wash, pre-wash, refresh, rinse
only, and timed wash. The memory 100 can also be used to store
information, such as a database or table, and to store data
received from one or more components of the washing machine 10 that
can be communicably coupled with the controller 96. The database or
table can be used to store the various operating parameters for the
one or more cycles of operation, including factory default values
for the operating parameters and any adjustments to them by the
control system or by user input.
[0034] The controller 96 can be operably coupled with one or more
components of the washing machine 10 for communicating with and
controlling the operation of the component to complete a cycle of
operation. For example, the controller 96 can be operably coupled
with the motor 88, the pump 74, the treating chemistry dispenser
62, the steam generator 82 and the sump heater 84 to control the
operation of these and other components to implement one or more of
the cycles of operation.
[0035] The controller 96 can also be coupled with one or more
sensors 104 provided in one or more of the systems of the washing
machine 10 to receive input from the sensors, which are known in
the art and not shown for simplicity. Non-limiting examples of
sensors 104 that can be communicably coupled with the controller 96
include: a treating chamber temperature sensor, a moisture sensor,
a weight sensor, a chemical sensor, a position sensor and a motor
torque sensor, which can be used to determine a variety of system
and laundry characteristics, such as laundry load inertia or
mass.
[0036] Referring now to FIG. 3, an exploded view of the treating
chemistry dispenser 62 is shown. The treating chemistry dispenser
62 can be received within and defined by the dispenser housing 106.
A top cover 108 is provided to engage with the dispenser housing
106 to create a sealed receptacle for receiving the dispenser
drawer body 110 of the treating chemistry dispenser 62. The
dispenser drawer body 110 can be slidably received within the
dispenser housing 106. The dispenser drawer body 110 defines a
first treating chemistry reservoir 112. The first treating
chemistry reservoir 112 has a fill opening 113 provided at the
front portion that can receive a first treating chemistry provided
by a user, such as, by way of non-limiting example, a pre-wash
agent. A reservoir body 114 is nested within the dispenser drawer
body 110, beginning behind the fill opening 113. The reservoir body
114 defines a second treating chemistry reservoir 116. The second
treating chemistry reservoir 116 can receive a second treating
chemistry provided by a user, such as, by way of non-limiting
example, a detergent or wash agent. The reservoir body 114 further
defines a third treating chemistry reservoir 118 within which a
softener plate 120 can be received. The third treating chemistry
reservoir 118 can receive a third treating chemistry provided by a
user, such as, by way of non-limiting example, a fabric softening
agent or bleach. The third treating chemistry reservoir 118 of the
reservoir body 114 includes a siphon tube 122. The softener plate
120 defines both a softener fill opening 124, as well as a siphon
cap 126. The siphon cap 126 is positioned such that it can receive
the siphon tube 122 of the third treating chemistry reservoir
118.
[0037] A distributor 128 is positioned above the nested dispenser
drawer body 110, reservoir body 114, and softener plate 120. The
distributor 128 includes a first float chamber 130 and a second
float chamber 132 that protrude from the lower surface 134 of the
distributor 128. The first float chamber 130 and second float
chamber 132 protrude downwardly from the lower surface 134 of the
distributor 128 into the second treating chemistry reservoir 116.
The upper surface 136 of the distributor 128 defines a liquid
supply circuit for selectively supplying liquid to the first,
second, or third treating chemistry reservoirs 112, 116, 118. The
distributor 128 defines a first branch 138 that is fluidly coupled
to the first treating chemistry reservoir 112. The distributor 128
further defines a second branch 140 that is fluidly coupled to the
second treating chemistry reservoir 116. The distributor 128 yet
further defines a third branch 142 that is fluidly coupled to the
third treating chemistry reservoir 118. A first float diverter 144
is received within the first float chamber 130 to selectively
supply liquid to either the first branch 138 or the second branch
140. A second float diverter 146 is received within the second
float chamber 132, upstream of the first float diverter 144, to
selectively supply liquid to either the first float diverter 144,
and thus to at least one of the first branch 138 or the second
branch 140, or the third branch 142. The upper surface 136 of the
distributor 128 is designed with patterns or mazes to prevent
leaking between the first branch 138, the second branch 140, and
the third branch 142.
[0038] FIG. 4A is a top view of the treating chemistry dispenser 62
with the top cover 108 removed for clarity. Both the first float
diverter 144 and the second float diverter 146 are shown in a
first, or non-floating, position in FIG. 4A, such that liquid
supplied to the distributor 128 follows a flow path as indicated by
an arrow 148. The arrow 148 shows that the flow path extends
straight through a top flow control channel 154 of the second float
diverter 146 and also straight through a top flow control channel
156 of the first float diverter 144 to the first branch 138 and
into the first treating chemistry reservoir 112.
[0039] FIG. 4B is a cross-sectional view along line IV B of FIG.
4A. The first float diverter 144 is shown in the first, or
non-floating, position. In the non-floating position, a plug
portion 150 of the first float diverter 144 is received within a
drain opening 152 of the first float chamber 130. The top flow
control channel 156 is vertically aligned with the distributor 128
such that liquid provided to the distributor 128 is directed
through the top flow control channel 156.
[0040] FIG. 5A is a top view of the treating chemistry dispenser
62, with the top cover 108 removed for clarity, in which the first
float diverter 144 is shown in a second, floating position, while
the second float diverter 146 remains in the first, non-floating
position as shown in FIG. 4A. When the first float diverter 144
occupies the floating position and the second float diverter 146
occupies the non-floating position, liquid supplied to the
distributor 128 follows a flow path as indicated by an arrow 160.
The arrow 160 shows that the flow path extends straight through the
top flow control channel 154 of the second float diverter 146 and
angles through the side flow control channel 158 of the first float
diverter 144 into the second branch 140 and then into the second
treating chemistry reservoir 116.
[0041] FIG. 5B is a cross-sectional view along line V B of FIG. 5A.
The first float diverter 144 is shown in the second, floating
position. In the floating position, the first float diverter 144 is
raised upwards at least partially out of the first float chamber
130. The plug portion 150 of the first float diverter 144 is
removed from the drain opening 152 of the first float chamber 130.
When the first float diverter 144 is raised up in the floating
position, the side flow control channel 158 is vertically aligned
with the distributor 128 such that liquid provided to the
distributor 128 is directed through the side flow control channel
158 to the second branch 140.
[0042] FIG. 6A is a top view of the treating chemistry dispenser
62, with the top cover 108 removed for clarity, in which the first
float diverter 144 is shown in the first, non-floating position,
while the second float diverter 146 is shown in a second, floating
position. When the second float diverter 146 occupies the floating
position, liquid supplied to the distributor 128 follows a flow
path as indicated by an arrow 164. The arrow 164 shows that the
flow path extends at an angle through the side flow control channel
162 of the second float diverter 146, into the third branch 142,
and then into the third treating chemistry reservoir 118.
[0043] FIG. 6B is a cross-sectional view along line VI B of FIG.
6A. The second float diverter 146 is shown in the second, floating
position. In the floating position, the second float diverter 146
is raised upwards at least partially out of the second float
chamber 132. A plug portion 166 is removed from a drain opening 168
of the second float chamber 132. When the second float diverter 146
is raised up in the floating position, the side flow control
channel 162 is vertically aligned with the distributor 128 such
that liquid provided to the distributor 128 is directed through the
side flow control channel 162 to the third branch 142.
[0044] FIG. 7A is a top perspective view of the first float
diverter 144. While the subsequent discussion (FIGS. 7A-7C) will
refer to the first float diverter 144, it will be understood that
the same description also applies to the structure of the second
float diverter 146, as both the first float diverter 144 and the
second float diverter 146 can have identical shape. It will also be
understood that, while the first float diverter 144 and the second
float diverter 146 can have identical shape, it is also within the
scope of the disclosure that the first and second float diverters
144, 146 can vary from one another in scale and/or diameter. In an
exemplary embodiment, the second float diverter 146 can have a
larger diameter than the first float diverter 144.
[0045] The first float diverter 144 has a generally cylindrical
shape, but can also be provided with a flat surface 170 on at least
one side of the first float diverter 144. The first float chamber
130 can be provided with a corresponding flat surface (not shown),
wherein, together with the flat surface 170 of the first float
diverter 144, the structural features can cooperatively act as an
index to fix the position of the first float diverter 144 within
the first float chamber 130 and prevent rotation of the first float
diverter 144 within the first float chamber 130. In an exemplary
embodiment, the flat surface 170 of the first float diverter 144
ensures that the first float diverter 144 does not rotate more
than, by way of non-limiting example, 3 degrees within the first
float chamber 130. It will be understood, however, that any
suitable degree of rotation of the float diverter 144 can be
permitted. While the first float diverter 144 is illustrated herein
as having a generally cylindrical shape, it will be understood that
the first float diverter 144 can have any suitable shape, such as,
by way of non-limiting example, rectangular, trapezoidal, or oval.
The shape of the first float diverter 144, including the flat
surface 170, can be designed to create an optimal amount of surface
tension between the first float diverter 144 and the first float
chamber 130 by reducing the contact surface between the two as
necessary. This ensures that the buoyance of the first float
diverter 144 is not undesirably counteracted by friction and/or
surface tension.
[0046] The top flow control channel 156 of the first float diverter
144 defines a flow path such that liquid flows straight through the
top flow control channel 156. The side flow control channel 158 is
provided vertically downward from the top flow control channel 156
such that liquid flows through only one or the other of the top
flow control channel 156 or the side flow control channel 158
depending on the vertical position of the first float diverter
144.
[0047] FIG. 7B is a sectional view of the first float diverter 144
along the line VII C of FIG. 7A. The profile of the side flow
control channel 158 can be viewed herein. The side flow control
channel 158 directs liquid flow along an angled path such that the
flow path of liquid is diverted from a straight directional
flow.
[0048] FIG. 7C is a bottom view of the first float diverter 144.
The first float diverter 144 can be provided with a plurality of
cavities 172 in its lower surface. The cavities 172 are provided
such that they can act as an air trap so the first float diverter
144 can achieve a desired density and buoyancy. While the first
float diverter 144 is illustrated as having four cavities 172, it
will be understood that any suitable number of cavities 172 can be
provided, including only a single cavity 172. The cavities 172 can
also have any suitable shape.
[0049] FIG. 8 is a cross-sectional side view of the first float
diverter 144 and the second float diverter 146, both in the first,
non-floating position. In the non-floating position, the top flow
control channel 156 of the first float diverter 144 is vertically
aligned with the distributor 128. A backflow portion 174 is
provided within the surface of the distributor 128. The backflow
portion 174 angles downwardly towards the first float chamber 130
and is fluidly coupled to the first float chamber 130. The top flow
control channel 154 of the second float diverter 146 is vertically
aligned with the distributor 128. A backflow reservoir 176 is
provided in the surface of the distributor 128 and positioned
between the first float diverter 144 and the second float diverter
146. The distributor 128 also includes a second backflow portion
178 adjacent the second float diverter 146. The second backflow
portion 178 angles downwardly towards the second float chamber 132
from the backflow reservoir 176 and is fluidly coupled with the
second float chamber 132.
[0050] Turning now to the operation of the treating chemistry
dispenser 62 and referring initially to FIGS. 4A and 4B, when the
washing machine has been turned off and no liquid is flowing into
the treating chemistry dispenser 62, both the first float diverter
144 and the second float diverter 146 are in the first,
non-floating position. When liquid is initially provided to the
treating chemistry dispenser 62, liquid flows straight through the
top flow control channels 154, 156 and is supplied to the first
branch 138 and into the first treating chemistry reservoir 112. As
long as the liquid supply rate remains constant, liquid continues
to flow to the first branch 138.
[0051] When the liquid supply rate is reduced or stopped, such that
liquid is no longer being supplied, liquid that remains in the
distributor 128 downstream of the first float diverter 144
backflows down the backflow portion 174 and into the first float
chamber 130. The liquid filling the first float chamber 130 causes
the first float diverter 144 to be floated upward into the second,
floating position. As the first float diverter 144 is floated to
the second, floating position, liquid is free to flow out of the
first float chamber 130 through the drain opening 152. The drain
opening 152 is sized such that the rate of draining the liquid
through the drain opening 152 is less than the liquid supply rate
at which liquid is entering the first float chamber 130. By way of
non-limiting example, the rate of draining the liquid through the
drain opening 152 can be not greater than half of the liquid supply
rate at which liquid is entering the first float chamber 130. In
this way, the position of the first float diverter 144 is
selectively controlled by both the status of liquid being supplied
to the treating chemistry dispenser 62, as well as the liquid
supply rate. It will also be understood that the position of the
first float diverter 144 can be selectively controlled by the
sequence of the liquid supply being provided or not provided, by
the duration of time the liquid supply is provided or not provided,
and/or by the spacing between bursts of liquid that are supplied to
the treating chemistry dispenser 62. By way of example, when the
liquid supply has been stopped and the first float diverter 144 is
in the floating position, the liquid supply must be resumed before
the liquid is able to drain out of the first float chamber 130 in
order for the first float diverter 144 to remain in the floating
position and direct the liquid supply accordingly.
[0052] Concurrently, liquid that remains in the distributor 128
between the second float diverter 146 and the first float diverter
144 flows into the backflow reservoir 176 (best seen in FIG. 8)
provided in the distributor 128. Because this liquid is retained in
the backflow reservoir 176, rather than proceeding down the second
backflow portion 178 and into the second float chamber 132, the
second float diverter 146 remains in the first, non-floating
position. It will be understood that some of the liquid remaining
in the distributor 128 between the second float diverter 146 and
the first float diverter 144, particularly any liquid which may be
present on the second backflow portion 178, can flow into the
second float chamber 132, rather than into the backflow reservoir
176. In this case, because of the increased diameter and volume of
the second float chamber 132, the amount of liquid that can be
present in the second float chamber 132 under these circumstances
is insufficient for the second float chamber 132 to fill enough
that the second float diverter 146 would be floated upward to the
floating position.
[0053] When the first float diverter 144 is in the second, floating
position and the liquid supply to the treating chemistry dispenser
62 resumes, liquid will flow straight through the top flow control
channel 154 of the second float diverter 146 as before, as the
second float diverter 146 remains in the first, non-floating
position. When the liquid that has flowed through the top flow
control channel 154 of the second float diverter 146 reaches the
first float diverter 144, the liquid will confront the side flow
control channel 158 and will be diverted at an angle to the second
branch 140, and then into the second treating chemistry reservoir
116. As long as the liquid supply rate remains constant in this
configuration, liquid will continue to flow to the second branch
140.
[0054] When the liquid supply rate is again reduced or stopped,
such that liquid is no longer being supplied, liquid that remains
in the distributor 128 between the second float diverter 146 and
the first float diverter 144 will flow back towards the backflow
reservoir 176. As the backflow reservoir 176 will already be filled
with liquid from the backflow at the previous cease in liquid
supply, the liquid will flow over the backflow reservoir 176, along
the second backflow portion 178, and into the second float chamber
132. The amount of liquid filling the second float chamber 132 at
this point is sufficient for the second float chamber 132 to fill
enough to cause the second float diverter 146 to be floated upward
into the second, floating position. As the second float diverter
146 is floated to the second, floating position, liquid is free to
flow out of the second float chamber 132 through the drain opening
168. The drain opening 168 is sized such that the liquid drain rate
through the drain opening 168 is less than the liquid supply rate
at which liquid is entering the second float chamber 132. By way of
non-limiting example, the liquid drain rate through the drain
opening 168 can be not greater than half of the liquid supply rate
at which liquid is entering the second float chamber 132. In this
way, the liquid supply being provided or not provided, as well as
the duration of the liquid supply being provided or not provided
and/or the liquid supply rate, serve to selectively control the
position of the second float diverter 146 in the same way as was
discussed previously relating to the first float diverter 144.
[0055] When the second float diverter 146 is in the second,
floating position and the liquid supply to the treating chemistry
dispenser 62 resumes, liquid that reaches the second float diverter
146 will confront the side flow control channel 162 and will be
diverted at an angle to the third branch 142, and then into the
third treating chemistry reservoir 118. As long as the liquid
supply rate remains constant in this configuration, liquid will
continue to flow to the third branch 142. When the liquid supply
rate is reduced to zero and no further liquid is supplied to the
treating chemistry dispenser 62, the liquid present in both the
first float chamber 130 and the second float chamber 132 will
eventually flow out through the drain openings 152, 168, allowing
both the first float diverter 144 and the second float diverter 146
to return to the first, non-floating position.
[0056] The embodiments disclosed herein provide a treating
chemistry dispenser for a laundry treating household appliance that
can selectively provide liquid to each of a plurality of reservoirs
individually using no additional machinery or parts beyond floating
diverters that are actuated to change position when the supply flow
of liquid is reduced or stopped. One advantage that can be realized
in the above embodiments is that the above described embodiments
are configured to provide a treating chemistry dispenser that
eliminates the need for multiple water supply points, and the
valves and conduits that would be required therewith. This results
in decreased manufacturing requirements and decreased cost. In
addition, the float mechanism provides a simple and robust
solution. By employing the embodiments disclosed herein, ease of
operation is improved, as well as simplification of the
manufacturing of only a single water supply point for the plurality
of reservoirs within the treating chemistry dispenser.
[0057] To the extent not already described, the different features
and structures of the various embodiments can be used in
combination with each other as desired. That one feature may not be
illustrated in all of the embodiments is not meant to be construed
that it cannot be, but is done for brevity of description. Thus,
the various features of the different embodiments can be mixed and
matched as desired to form new embodiments, whether or not the new
embodiments are expressly described.
[0058] While the present disclosure has been specifically described
in connection with certain specific embodiments thereof, it is to
be understood that this is by way of illustration and not of
limitation. Reasonable variation and modification are possible
within the scope of the forgoing disclosure and drawings without
departing from the spirit of the present disclosure which is
defined in the appended claims.
* * * * *