Water dispenser abstract
A water dispenser for a refrigerator freezer having a water dispensing
control including a measured fill mode of operation in which the
water dispenser dispenses a predetermined amount of water and a
manual fill mode of operation. The water dispensing control allows
user selection of the units of measure, the type of container being
filled and selection of the amount to be dispensed. A user display
can display the selections and can display the amount dispensed
in real time.
Water dispenser claims
We claim:
1. A refrigerator freezer having a water dispenser from a source
of water comprising: a user accessible dispenser housing including
a spout; and a water dispensing control having a measured fill mode
of operation in which the water dispenser dispenses a predetermined
amount of water through the spout and a manual fill mode of operation
in which the water dispenser dispenses water through the spout as
long as the water dispenser is activated including: a fill mode
selector; a water valve connected to the source of water; a valve
control connected to the valve and to the water dispenser control;
and a water dispensing actuator connected to the water dispensing
control.
2. The refrigerator freezer of claim 1 wherein the water dispensing
control includes a water flow sensor connected to the valve control.
3. The refrigerator freezer of claim 2 further including a user
interface display and wherein the water dispensing control displays
the amount of water dispensed on the user interface display in the
manual fill mode.
4. The refrigerator freezer of claim 3 wherein the user can select
the units of measure for the amount of water dispensed.
5. The refrigerator freezer of claim 1 wherein the water dispensing
control includes a user interface control connected to the valve
control, and the user interface control provides user selection
of the amount of water dispensed in the measured fill mode.
6. The refrigerator freezer of claim 5 further including a user
interface having one or more user operable selectors connected to
the user interface control and wherein user selection of the amount
of water dispensed in the measured fill mode includes operation
of one or more of the user operable selectors.
7. The refrigerator freezer of claim 1 wherein the water dispensing
control includes a user interface control and refrigerator freezer
further includes a user interface having one or more user operable
selectors and a user interface display connected to the user interface
control.
8. The refrigerator freezer of claim 7 wherein the fill mode selector
is one of the user operable selectors on the user interface.
9. The refrigerator freezer of claim 7 wherein one of the user
operable selectors is a units selector, and wherein the units of
measure selections include one or more of cups, ounces, liters and
coffee cup quantities of water.
10. The refrigerator freezer of claim 9 wherein the user interface
control displays the selected unit of measure on the user interface
display.
11. The refrigerator freezer of claim 7 wherein one of the user
operable selectors is a container selector and wherein the container
selections include coffee pot, water bottle, custom, pitcher, favorite
and preset.
12. The refrigerator freezer of claim 11 wherein the user operable
selectors include a units selector and increase and decrease selectors
wherein user selection of the amount of water dispensed in the measured
fill mode includes operation of the increase or decrease selectors.
13. The refrigerator freezer of claim 12 wherein the user interface
control displays the selected container and the amount of water
to be dispensed into the selected container and the amount dispensed
is displayed on the user interface display.
14. The refrigerator freezer of claim 1 wherein the dispenser housing
includes a user interface and the water dispensing actuator includes
a press to fill selector on the user interface.
15. The refrigerator freezer of claim 14 wherein a momentary operation
of the press to fill selector initiates dispensing of a predetermined
amount of water in the measured fill mode.
16. The refrigerator freezer of claim 14 wherein operation of the
press to fill selector causes dispensing of water as long as the
press to fill selector is operated in the manual fill mode.
17. The refrigerator freezer of claim 1 wherein the dispenser housing
includes a paddle located adjacent the spout and arranged to be
engaged by a container inserted in the dispenser housing under the
spout, and the water dispensing actuator includes a switch operated
by the paddle when a container is pressed against the paddle.
18. The refrigerator freezer of claim 14 wherein the dispenser
housing includes a paddle located adjacent the spout and arranged
to be engaged by a container inserted in the dispenser housing under
the spout, and the water dispensing actuator further includes a
switch operated by the paddle when a container is pressed against
the paddle.
19. The refrigerator freezer of claim 11 wherein the water dispensing
control includes a user interface control including a microcomputer
having non-volatile storage connected to the valve control and the
user interface control includes a teach and repeat mode wherein
the amount of water to be dispensed into a selected container is
stored in the non-volatile storage, and the user interface control
determines of the amount of water to be dispensed into a selected
container in the measured fill mode by querying the non-volatile
storage prior filling the selected container.
20. The refrigerator freezer of claim 1 wherein the water dispensing
control includes user pausing of water dispensing in the measured
fill mode by operation of the water dispensing actuator.
21. The refrigerator freezer of claim 20 wherein the dispenser
housing includes a paddle located adjacent the spout and arranged
to be engaged by a container inserted in the dispenser housing under
the spout, and the water dispensing actuator includes a switch operated
by the paddle when a container is inserted into the housing under
the spout, and user pausing in the measured fill mode includes moving
the container out of engagement with the paddle.
22. The liquid dispenser of claim 20 wherein the dispenser housing
includes a user interface and the water dispensing actuator includes
a press to fill selector on the user interface, and user pausing
in the measured fill mode includes pressing the press to fill button.
23. An ice and water dispenser for a refrigerator freezer comprising;
a dispenser housing in the freezer door including a water spout,
an ice chute and a user interface including one or more user operable
selectors; a refrigerated water container connected to the spout;
an ice maker and ice dispenser in the freezer compartment positioned
to provide ice pieces to the chute; a dispenser control having a
measured fill mode of operation in which the ice and water dispenser
dispenses a predetermined amount of water through the spout and
a manual fill mode of operation in which the ice and water dispenser
dispenses water through the spout as long as the dispenser is activated
including: a user interface control connected to the user interface;
a fill mode selector; a valve connected to the water container;
a valve control connected to the user interface control and to the
valve; a water flow sensor connected to the valve control; a water
dispensing actuator connected to the user interface control; and
an ice dispensing actuator connected to the user interface control.
24. The ice and water dispenser of claim 23 wherein the water dispenser
actuator includes a press to fill button on the user interface and
the ice dispenser actuator includes a press to dispense button on
the user interface.
25. The ice and water dispenser of claim 24 wherein the water dispenser
actuator also includes a paddle located in the dispenser housing
adjacent the spout and a user can activate water dispensing by pressing
a container against the paddle or by pressing the press to fill
button.
26. The ice and water dispenser of claim 24 wherein the ice dispenser
actuator also includes a paddle located in the dispenser housing
adjacent the chute and a user can activate ice dispensing by pressing
a container against the paddle or by pressing the press to dispense
button.
27. The ice and water dispenser of claim 23 wherein the user interface
includes a user interface display screen and the dispenser control
includes a time of day and date function that displays the time
of day and date on the user interface display screen when the user
interface control displays a home screen or when time of day is
selected by a user.
28. The ice and water dispenser of claim 27 further including a
filter for filtering water supplied to the refrigerated water container
and the ice maker, and wherein the valve control monitors filter
usage by accumulating the amount of water flow to the water dispenser
and the ice maker sensed by the water flow sensor and the elapsed
time since the filter was last replaced, and wherein the valve control
communicates the filter status to the user interface control which
displays the filter status on the user interface.
29. The ice and water dispenser of claim 27 wherein the dispenser
control further includes monitoring power interruption and the time
of day and date function includes a backup power supply, wherein
the dispenser control measures the duration of the power interruption
by storing the time of a reference clock in the dispenser control
and calculating a duration in hours, and displays a power interruption
message on the user display after power is restored advising the
user that power has been interrupted and the duration of the power
interruption.
30. The ice and water dispenser of claim 29 wherein the short nuisance
power interruptions are ignored.
31. The ice and water dispenser of claim 29 wherein the user interface
control further includes an audible signal generator and the user
interface control produces an audible signal with the power interruption
display.
32. The ice and water dispenser of claim 23 wherein the refrigerator
freezer includes a refrigeration control that senses the temperature
in the freezer compartment and the refrigerator compartment and
the user interface includes a user interface display and the user
interface control communicates with the refrigeration control and
that displays the freezer compartment and refrigerator compartment
temperatures on the user interface display.
33. The ice and water dispenser of claim 32 wherein one or more
of the user operable selectors on the user interface allow the user
to increase or decrease the selected temperature for the freezer
compartment and the refrigerator compartment.
34. The ice and water dispenser of claim 23 wherein the dispenser
control dispenses a predetermined amount of water to the ice maker
to begin an ice making cycle.
Water dispenser description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to ice and water dispensers for refrigerator
freezers. More particularly the invention relates to a water dispenser
that can dispense measured amounts of water or can dispense water
in a normal fill mode in which water is dispensed as long as an
actuator is operated by the user.
[0003] 2. Description of the Related Art
[0004] Refrigerator freezers having ice and water dispensers are
known. Liquid dispensers that dispense measured amounts of liquid
are also known.
SUMMARY OF THE INVENTION
[0005] The present invention is directed to a refrigerator freezer
a water dispenser that can include a user accessible dispenser housing
having a spout. The water dispensing control can include a measured
fill mode of operation in which the water dispenser dispenses a
predetermined amount of water through the spout and a manual fill
mode of operation in which the water dispenser dispenses water through
the spout as long as the water dispenser is activated. The water
dispensing control can include a fill mode selector, a water valve
connected to a source of water, a valve control connected to the
water valve and the water dispensing control and a water dispensing
actuator connected to the water dispensing control.
[0006] The water dispensing control can include a water flow sensor
connected to the valve control.
[0007] The refrigerator freezer can include a user interface display
and the water dispensing control can display the amount of water
dispensed on the user interface display.
[0008] The water dispenser control can allow a user to select the
units of measure for the amount of water dispensed.
[0009] The refrigerator freezer can include a user interface control
connected to the valve control, and the user interface control can
provide for user selection of the amount of water dispensed in the
measured fill mode.
[0010] The user interface control can include one or more user
operable selectors and a user interface display connected to the
user interface control.
[0011] One of the user operable selectors can be a units selector
and the units selections can include one or more of cups, ounces,
liters and coffee cup quantities of water.
[0012] One of the user operable selectors can be a container selector
and the container selections can include coffee pot, water bottle,
custom, pitcher, favorite and preset containers.
[0013] The water dispensing actuator can be a press to fill selector
on the user interface or a paddle located in the dispenser housing.
[0014] Another aspect of the invention is an ice and water dispenser
for a refrigerator freezer including a dispenser housing in the
freezer door including a water spout, an ice chute and a user interface
including one or more user operable selectors. The ice and water
dispenser can include a refrigerated water container connected to
the water spout and an ice maker and ice dispenser in the freezer
compartment positioned to provide ice pieces to the ice chute. The
ice and water dispenser includes a dispenser control having a measured
fill mode of operation in which the dispenser dispenses a predetermined
amount of water through the spout, and a manual fill mode of operation
in which the dispenser dispenses water through the spout as long
as the dispenser is activated. The ice and water dispenser can include
a user interface control connected to the user interface, a fill
mode selector, a valve connected to the water container, a valve
control connected to the user interface control and the valve, a
water flow sensor connected to the valve control, a water dispensing
actuator connected to the user interface control and an ice dispensing
actuator connected to the user interface control.
[0015] The refrigerator freezer can include a filter for filtering
water supplied to the refrigerated water container and the ice maker
and the dispenser control can include a time of day and date function.
The valve control can monitor filter usage by accumulating the amount
of water flow and the elapsed time since the filter was last replaced.
The valve control can communicate the filter status to the user
interface control for display on a user interface display.
[0016] The dispenser control can further include monitoring power
interruption to the refrigerator freezer and the time of day and
date function can include a backup power supply. The dispenser control
can measure the duration of a power interruption by storing the
time of a reference clock and calculating the power interruption
duration. The dispenser can display a power interruption message
on a user display after power is restored advising the user that
power has been interrupted and the duration of the power interruption.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 is a perspective view of a refrigerator freezer equipped
with an ice and water dispenser according to the invention.
[0018] FIG. 2 is a schematic view of a refrigerator freezer showing
one embodiment of locations of controls for the ice and water dispenser
according to the invention.
[0019] FIG. 3 is a block diagram of one embodiment of a portion
of the control for the ice and water dispenser according to the
invention.
[0020] FIG. 4 is a block diagram of one embodiment of another portion
of the control for the ice and water dispenser according to the
invention.
[0021] FIG. 5 is a block diagram of one embodiment of another portion
of the control for the ice and water dispenser according to the
invention.
[0022] FIG. 6 is a circuit diagram of one embodiment of a flow
sensor interface portion of the control for the ice and water dispenser
according to the invention.
[0023] FIG. 7 is a partial perspective of one embodiment of a dispenser
housing and user interface for the ice and water dispenser according
to the invention.
[0024] FIG. 8 is another embodiment of a user interface for the
ice and water dispenser according to the invention.
[0025] FIG. 9 is another embodiment of a user interface illustrating
selection of an item to fill.
[0026] FIG. 10 is the user interface of FIG. 9 illustrating adjustment
of the amount to fill a water bottle.
[0027] FIG. 11 is the user interface of FIG. 9 illustrating adjustment
of the amount to fill a coffeepot.
[0028] FIG. 12 is the user interface of FIG. 9 illustrating adjustment
of the amount to fill a custom container.
[0029] FIG. 13 is the user interface of FIG. 9 illustrating display
of the temperature of the refrigerator and freezer compartments.
[0030] FIG. 14 is the user interface of FIG. 9 illustrating adjustment
of the temperature of the refrigerator and or freezer compartments.
[0031] FIG. 15 is the user interface of FIG. 9 illustrating selection
of date/time for adjustment.
[0032] FIG. 16 is the user interface of FIG. 15 illustrating display
and adjustment of the time of day.
[0033] FIG. 17 is the user interface of FIG. 9 illustrating the
filter status.
[0034] FIG. 18 is a flow chart illustrating measured fill operation
of one embodiment of the control according to the invention.
DESCRIPTION OF THE INVENTION
[0035] The use of refrigerator water dispensers has changed with
the advent of the addition of water filters to refrigerators. Consumers
are now using filtered water from the refrigerator water dispenser
instead of using sink mounted or countertop water filtration systems.
Accordingly, consumers are requiring more flexibility and features
from their refrigerator water dispenser. One aspect of the improved
water dispenser for a refrigerator is the provision of measured
fill capability to allow the user to select or choose predetermined
amounts of water to be dispensed. While the water dispenser according
to the invention is disclosed as part of an ice and water dispenser
for a refrigerator freezer, those skilled in the art should understand
that the water dispenser according to the invention can be used
as a water dispenser only and not combined with an ice dispenser.
Accordingly, the water dispenser according to the invention will
be referred to as a water dispenser with the understanding that
water dispenser is to be understood as referring to both a water
dispenser and an ice and water dispenser.
[0036] Turning to FIG. 1 a refrigerator freezer 10 can include
a water dispenser 15 mounted on the door 11 of the freezer compartment.
The refrigerator compartment can have a door 12. While the refrigerator
freezer shown in FIG. 1 is a side by side refrigerator freezer,
the water dispenser according to the invention could be used in
conjunction with a refrigerator freezer having a top or bottom freezer
configuration, a refrigerator or a freezer having a single door.
The water dispenser 15 can include a dispenser housing 16 mounted
on the face of the freezer door 11. Those skilled in the art will
understand that water dispenser 15 can be mounted on the face of
refrigerator door as well as a freezer door. The dispenser housing
16 can include a user interface 17 and a recess 18 forming a cavity
to receive a container to be filled. Dispenser housing 16 can also
support a spout 19 for delivering water to a container. Spout 19
can be movable to facilitate filling of different size containers.
Co-pending patent application U.S. 20030308 filed concurrently
with this application, discloses movable spout arrangements that
can be used with the water dispenser according to this invention
which patent application is incorporated by reference. Dispenser
housing 16 can include actuators 7 and 8 that can be paddles or
pads in recess 18 for actuating the ice dispenser and water dispenser
as is well known in the art. While actuators 7 and 8 are described
as paddles or pads, those skilled in the art will understand that
actuators 7 and 8 can be any mechanism arranged to be engaged by
a container to be filed. Actuators 7 and 8 will be referred to as
paddles in this application, but paddles should be understood as
any mechanism arranged to be engaged by a container to be filled
with ice pieces or water. Dispenser housing 16 can also include
a shelf 9 in the bottom of the recess for supporting a container
being filled.
[0037] Turning to FIG. 7 another dispenser housing embodiment 16'
can be seen. Dispenser housing 16' can have a recess 18' for containers
to be filled. In the embodiment of FIG. 7 a single actuator 4 can
be provided to activate both water and ice dispensing. Those skilled
in the art that the dispenser housings and actuators shown in FIG.
1 and FIG. 7 can be used as desired.
[0038] Turning to FIG. 2 the location of certain of the water
dispenser control components for one embodiment of the invention
can be seen in schematic form. The water dispenser according to
the invention can include a user interface control 20 a core control
30 and a valve control 40. User interface control 20 core control
30 and valve control 40 can each include a microcontroller. In the
embodiment shown schematically in FIG. 2 the user interface control
20 and core control 30 can be located in the freezer compartment
door 11. Valve control 40 can be located in the unit area 13 under
the freezer compartment 5 and refrigerator compartment 6. While
the operation of user interface control 20 core control 30 and
valve control 40 will be described in connection with water dispensing
operations, the controls can also provide control of ice making
and ice dispensing operations as well. Communication between the
user interface control 20 the core control 30 and valve control
40 can be via an inter-module simple protocol (ISP) bus connecting
the controls that allows the three controls to communicate in operation.
Those skilled in the art will understand that the bus, cables, interfaces
on circuit boards and protocol, can be arranged to have a latency
time sufficient to satisfy user expectations for response of the
controls. Those skilled in the art will also understand that one
or more of user interface control 20 core control 30 and valve
control 40 can be positioned on a single circuit board or can otherwise
be positioned elsewhere in a refrigerator, freezer or refrigerator
freezer as desired.
[0039] Turning to FIG. 8 the user interface 17 of the water dispenser
embodiment of FIG. 1 can be seen in greater detail. In this embodiment
of the invention, user interface 17 can include a plurality of touch
pads 21 and LEDs, not shown, to illuminate or indicate actuation
of the touch pads 21. In the embodiment shown in FIG. 8 the operator
touch pads 21 can be labeled: Locked, Press to Fill, Liters/Ounces/Cups,
Increase, Decrease, Measured Fill, Crushed/Cubed, Auto/Nightlight/On,
Filter Reset and Clear and can be arranged to control water dispenser
and other refrigerator operations as will be described in greater
detail. While touch pads 21 are shown in this embodiment of the
invention, those skilled in the art will understand that buttons
or other user operable switches can be used on user interface 17.
User interface 17 can also include a display 22 that can be a LCD
display that can display a plurality of 7-segment digits or other
predetermined icons that are well known in the art.
[0040] The measured fill operation of the water dispenser embodiment
of FIG. 1 and FIG. 8 can be seen by referring to FIG. 18. A user
can select the measured fill mode of operation by touching the touch
pad 21 labeled Measured Fill. Activation of the Measured Fill touch
pad 21 block 201 can cause the user interface control 20 to illuminate
the Measured Fill touch pad, block 202. The user interface control
20 can be arranged to allow the user a predetermined period of time
in which to make a further selection, or if not, exit the measured
fill mode, block 203 and return to the normal fill mode. Upon selection
of the measured fill mode of operation the user can select the units
of measure, and/or the type of container to be filled. To select
the units of measure the user can touch the Liters/Ounces/Cups touch
pad 21 block 204. For each time a user touches or presses the Liters/Ounces/Cups
touch pad 21 the user interface control 20 can change the unit of
measure to the next in sequence which can be: ounces, cups, liters,
block 205. While units of ounces, cups and liters are identified
in the water dispenser embodiment of FIG. 1 FIG. 8 and FIG. 18
those skilled in the art will understand that any units of measure
can be employed and the sequence can be varied as desired. The user
can also select the quantity of water to be dispensed by touching
the Increase or Decrease touch pads 21 block 206. Depending upon
the units selected the amount of water dispensed can be changed
in discrete amounts for each touch of the Increase or Decrease touch
pads 21 block 207. For example, increase or decrease amounts can
be 1 ounce, 1/4 or 1/3 cup, or 0.05 liters. Those skilled in the
art will understand that the increase/decrease amounts can be set
to different amounts as desired. The units and amount of water selected
can be displayed in display 22 to advise the user as to the units
and amount selected. The user can also select the type of container
by touching the desired touch pad 21 see FIG. 9 for one embodiment
of container selection options, block 208. Upon selection of a container
type, user interface control 20 can provide the user with pre-set
options of fill quantities or can allow the user to select the fill
amount using the Increase or Decrease touch pads 21 block 209.
For example, a Water Bottle mode can be provided and specific amounts
such as 16 20 24 and 33 ounces or 0.50 0.60 0.75 or 1.00 liters
can be provided as selections. Those skilled in the art will understand
that different or additional selections can be provided. As above,
the container and quantity of water selected can be displayed on
display 22. After making measured fill selections, or determining
that prior selections are satisfactory the user can initiate a measured
fill by pressing and holding water paddle 8 block 210 or touching
and releasing the Press to Fill touch pad 21 block 211. Once activated
the user interface control can cause the water dispenser to dispense
the selected amount of water, blocks 212-217. As indicated in block
214 the water dispenser can be arranged to countdown the measured
fill from the amount selected to "0" when the measured
fill is complete. A measured fill dispense cycle can be arranged
to be paused by releasing water paddle 8 or touching and releasing
the Press to Fill touch pad 21 if touch pad 21 is used to start
the dispense cycle. A dispense cycle can be paused for a predetermined
period, such as one minute, after which the measured fill mode can
be exited. A dispense cycle can be resumed by again pressing water
paddle 8 or touching and releasing the Press to Fill touch pad 21.
After completion of a dispense cycle the control can be arranged
to remain in the measured fill mode for a predetermined period such
as one minute. The control can be arranged to allow a user to abort
a dispense cycle by touching and releasing the Measured Fill touch
pad 21. The control can also be arranged to prohibit water dispensing
when the freezer compartment door 11 is opened. Those skilled in
the art will understand that the water dispenser 15 can be arranged
to count up as the container is filled in the measured fill mode
instead of counting down to zero as the selected amount of water
is dispensed.
[0041] An example of a measured fill operation can be seen by referring
to blocks 212-217. When a user touches or presses the Water Fill
touch pad 21 or presses a container against water paddle 8 block
210 the user interface control 20 can send a message on the ISP
bus to the valve control 40 to begin dispensing the selected amount
of water, block 212. Valve control 40 can activate water valve solenoid
44 block 213 and can begin monitoring flow sensor 41 block 215.
User interface control 20 can monitor the water flow data in valve
control 40 and can operate a countdown on display 22. When the selected
amount of water has been dispensed, valve control 40 can de-energize
water valve solenoid 44 and can send a message via the ISP bus to
the user interface that dispensing has stopped. The user interface
control 20 can provide an audible signal to the user that dispensing
is complete by energizing a piezo beeper, not shown. In the embodiment
of FIG. 1 FIG. 8 and FIG. 18 the piezo beeper can be a 4 kHz beeper.
Those skilled in the art will readily understand that other audible
signal devices can be used to provide signals to indicate completion
of measured fill dispensing as well as for other events that can
include confirmation that a command has been accepted, an error
signal to advise the user of error conditions and the like.
[0042] The embodiment of the invention illustrated in FIG. 9 through
FIG. 12 can include a user interface 17' that can be arranged to
provide the user with a selection of type of container to be filled
and to set the amount of water to be dispensed into the container.
In the embodiment of FIG. 9 through FIG. 12 user interface 17' can
be a touch screen device that is well known in the art. FIG. 9 illustrates
selections that can include Water Bottle, Coffee Pot and Custom
touch pads 21'. User interface control 20 can cause display of available
container selections as touch pads 21' when the user has touched
or pressed the Item to Fill touch pad, on a previous screen not
shown. While Water Bottle, Coffee Pot and Custom selections are
illustrated in FIG. 9 those skilled in the art will understand
that other selections can be provided in lieu of, or in addition
to those selections, and can include Pitcher, Favorite and Preset
among others. FIG. 10 FIG. 11 and FIG. 12 illustrate alternatives
that can be available to a user depending on the type of container
and units selected and show the touch pads that can be displayed
on the touch screen. For example in FIG. 10 the user has selected
Ounces and has touched the + touch pad enough times to reach 16
as the number of ounces to be dispensed. As above, once the user
has completed selection of, or confirmation of the container and
amount of water to be dispensed, touching the Fill touch pad 21'
or pressing the water dispensing paddle 8 can initiate a measured
fill dispense cycle of the selected amount of water as described
above.
[0043] When the measured fill mode is not selected, block 201
the water dispenser can operate in a normal fill mode. In the normal
fill mode, the user interface control 20 can cause the water dispenser
to dispense water as long as the water paddle 8 or Press to Fill
touch pad 21 are actuated. In the normal fill mode the water dispenser
can display the amount of water dispensed in display 22. In the
embodiment of FIG. 1 FIG. 8 and FIG. 18 the user interface control
can be arranged to display the amount of water dispensed in ounces.
However, those skilled in the art will readily understand the units
of measure can be in other units of measure instead of ounces. The
user interface control 20 can cause a display of the amount of water
dispensed during operation in the normal fill mode. As mentioned
above, valve control 40 can track the amount of water dispensed
by monitoring and accumulating the signal produced by the flow sensor
41 through flow sensor interface 43. User interface control 20 can
periodically send a query over the ISP bus to the valve control
to determine the amount of water dispensed in the current normal
fill cycle. The user interface can display the result on display
22 and can update the information at a rate sufficient to provide
essentially real time display of the amount of water dispensed.
In the normal fill mode the care control 30 can be arranged to prohibit
dispensing water when the freezer door 11 is open. Those skilled
in the art will understand that valve control 40 can be arranged
to provide a maximum dispensing time for the normal fill mode to
protect system components.
[0044] User interface control 20 can be arranged to allow a user
to program the amount of water to be dispensed by inputting and
saving to non-volatile storage of a microcontroller, not shown,
a custom or preset amount by increasing or decreasing a default
amount of water. In another embodiment users can program the amount
of water to be dispensed in a teach and repeat mode where a user
can manually fill a container and the amount of water dispensed
can be saved in microcontroller non-volatile storage under a Favorites,
Custom or Preset, or similar setting or button. Those skilled in
the art will understand that quantities to be dispensed, and other
values that might be desired to be user adjustable, can be stored
in non-volatile storage of a microcontroller. The microcomputer
non-volatile storage can be factory programmed, flash programmed,
user programmed or can be user programmed using teach and repeat
algorithms all as are well known in the art.
[0045] User interface control 20 can be arranged so that when the
measured fill mode is selected and filling of the container has
commenced, the user interface control can pause the fill mode in
the event the user moves the container out of contact with paddle
8 if filling was initiated by pressing the paddle 8. Similarly,
user interface control 20 can pause the fill mode if the user touches
the Press to Fill touch pad again during filling. If the user resumes
the measured fill mode within a predetermined amount of time, that
for example can be 2 minutes, user interface control 20 will resume
and complete the measured fill dispensing cycle. If the user does
not resume the measured fill mode within the predetermined amount
of time, the user interface control can reset to the normal fill
mode.
[0046] As noted above dispenser housing can include an ice dispensing
paddle 7 in recess 18. User interface control 20 can be arranged
to control dispensing of ice pieces upon actuation of paddle 7 by
energizing an ice dispenser motor, not shown. User interface control
20 can also be arranged to allow a user to operate the ice dispenser
by touching a touch pad 21 on the user interface 17. Thus, ice dispensing
can be accomplished by pressing a container against paddle 7 or
by touching a Dispense Ice touch pad 21 on user interface 17.
[0047] Turning to schematic drawings FIG. 3 FIG. 4 and FIG. 5
the operation and interaction of the user interface control 20
the core control 30 and the valve control 40 will be described in
greater detail. User interface 20 can be a smart control and can
include a microcontroller, not shown, mounted on a circuit board
as is well known in the art. The user interface control 20 can provide
for user interaction with the ice and water dispensers. The user
interface control 20 can be positioned adjacent user interface 17
which can be a traditional active overlay or a touch sensor active
overlay device as are well known in the art. User interface 17 can
include switches, such as touch pads 21 LEDs and one or more LCD
displays such as display 22 and can include one or more phototransistors,
and/or IR sensors if it is desired to measure ambient light conditions
or detect motion in the vicinity of the water dispenser 15. User
display 22 can include one or more 7-segment LCD displays as are
well known in the art. User interface 17 including the active overlay,
can be connected to user interface control 20 by a pin connector
or cable 23 as is well known in the art. User interface control
20 can read the user interface/active overlay buttons, switches,
touch pads, phototransistor, if used, and any other sensors. The
user interface control 20 can drive the active overlay LEDs, and
LCDs. User interface control 20 can be connected to core control
30 by a cable 31. Core control 30 can provide power and communicate
with user interface control 20 via cable 31. The user interface
control 20 can be the master on the ISP bus and can communicate
via the ISP bus with the core control 30 and valve control 40. Paddles
7 and 8 FIG. 1 can be arranged to operate an ice switch 7' and
a water switch 8' connected to the user interface control 20. User
interface control 20 can control operation of other portions of
the ice and water dispenser shown in outline form on the right side
of the core control 30 shown in FIG. 3. Those skilled in the art
will understand that other typical ice and water dispenser components
such as an ice dispenser motor, an ice crusher, the ice maker or
other user controlled refrigerator freezer components can be controlled
by the user interface control 20 and operated by core control 30
if desired.
[0048] A microcontroller, not shown, can be incorporated in the
user interface control 20 and can be programmed with decision software
that can operate on an "if" "then" basis in
which an action to be taken can be based on the input can be found
in look up tables stored in non-volatile storage or memory as is
well known in the art. The software can be programmed to include
possible modes of operation, possible inputs and possible, and if
desired, maximum outputs. The programming of the user interface
microcontroller, not shown, can be general to cover all known and
anticipated embodiments of the ice and water dispenser. The user
interface microcontroller can be arranged for flash programming
of flash (non-volatile) memory. Calibration values and features
can be programmed into user interface control 20 by flash programming
to set a particular user interface control 20 for the brand/model
of refrigerator freezer in which it will be used. User interface
control 20 can include a flash programming port 24 to facilitate
programming of the microcontroller during manufacturing, or in the
field, as will be readily understood by those skilled in the art.
[0049] Core control 30 can include a microcontroller, not shown,
and can be responsible for ice dispensing, heater operation, power
outage detection and measurement, and reading of freezer compartment
door status. A microcontroller, not shown, an be provided for core
control 30 and can be similar to a microcontroller that can be included
in user interface control 20 and can be programmed with similar
decision software. Core control 30 can include a power supply for
the core control 30 the user interface control 20 and the valve
control 40 and can be connected to the power supply for the refrigerator
freezer via cable 32. Core control 30 can be a slave on the ISP
bus and communicate, via the ISP bus, with the user interface control
20. Core control 30 can also be connected to the valve control 40
by cable 33. Cable 33 can provide ISP communication with the valve
control 40. Core control 30 also can include a flash programming
port 35 to permit flash programming of a core control microcontroller,
not shown, to embed information in the flash memory or non-volatile
storage of the core control microcontroller corresponding to the
brand/model of refrigerator freezer the core control will be used
in. As mentioned above, other components typically included in an
ice and water dispenser such as an ice dispenser motor, an ice door
motor or control, or other refrigerator freezer features can be
connected to and controlled by the core control 30 under the direction
of the user interface control 20. One or more of the user interface
control 20 core control 30 or valve control 40 can include a low
voltage power supply. Those skilled in the art will understand that
a low voltage power supply can be provided separately for each control
or can be a single low voltage power supply for the three controls.
[0050] As mentioned above, the water dispenser can be arranged
to interrupt ice or water dispensing in the event the freezer door
11 is opened. A freezer compartment door switch 34 can be connected
to core control 30 to interrupt/prevent operation of the ice or
water dispenser when the freezer door 11 is open. As shown in FIG.
3 core control 30 can be connected to line voltage through door
switch 34.
[0051] Turning to FIG. 5 valve control 40 can be connected to
core control 30 by cable 33 as mentioned above. Valve control 40
can be mounted with a solenoid valve assembly, not shown, that can
have one solenoid valve for water dispensing and one solenoid valve
for icemaker fill. The valve assembly can include a flow sensor
41 on the inlet side of the water dispensing and icemaker fill valves
to monitor flow to both valves. While two water valves are included
in this embodiment, those skilled in the art will understand that
a single water valve or more than two water valves can be used if
desired. Those skilled in the art will understand that valve control
40 can be incorporated in core control 30 instead of being a separate
control.
[0052] Valve control 40 can be responsible for water dispensing,
filling of an icemaker and keeping track of water usage and elapsed
time on the water filter 14 and can include a microcontroller 45.
Valve control 40 can be arranged to dispense water to an icemaker
in response to a signal from the icemaker to begin an ice making
cycle. Alternately, an icemaker can communicate with the user interface
control 20 and the user interface control 20 can communicate with
the valve control via the ISP bus to cause valve control 40 to fill
the icemaker to begin an ice making cycle. The valve control 40
can read the flow sensor 41 input and can drive the water dispenser
valve solenoid 44 and icemaker fill valve solenoid 47 to provide
the amount of water directed by the user interface control 20. The
amount of water dispensed to an ice maker the ice maker fill valve
can be controlled by the user interface control 20 or can be flash
programmed into the valve control 40 in the case of the icemaker
fill valve. The valve control 40 can be a slave on the ISP bus and
can communicate via the ISP bus with user interface control 20.
Water dispensing can be commanded by the user interface control
20.
[0053] As mentioned above, there can be two types of water dispensing,
normal fill and measured fill. In normal fill the user interface
control 20 can command the valve control 40 via the ISP bus to dispense
water until the user interface control 20 commands the valve control
40 to stop. In measured fill the user interface control 20 can command
the valve control 40 via the ISP bus to dispense a specific amount
of water. The valve control 40 can dispense the specific amount
of water by reading the input from flow sensor 41. Flow sensor 41
can be a Hall effect sensor that is well known in the art, and can
be connected to valve control 40 by cable 42. Those skilled in the
art will understand that other well known flow sensors can be used
in lieu of a Hall effect sensor such as a reed switch. Flow sensor
41 can be arranged with respect to the water valve or water valves,
not shown, to generate signals in response to water flow through
the water valve or valves. Flow sensor 41 can produce a pulse for
every predetermined amount of water that passes through flow sensor
41 (volume_per_pulse). Those skilled in the art will readily understand
that a single water valve can be used to supply water to both the
water dispenser and to an icemaker using a diverter or two-way valve,
or separate valves can be provided. In the event that separate valves
are provided for the water dispenser and an icemaker, valve control
40 can be arranged to control both valves.
[0054] Valve control 40 can be connected to line voltage to provide
power to operate a water valve or valves as is well known in the
art. Valve control 40 microcontroller 45 can track the amount of
water measured by the flow sensor and communicate the information
to the user interface control 20 via the ISP bus. Valve control
40 can energize water valve solenoid 44 to dispense water in response
to a message on the ISP bus from the user interface control 20.
As mentioned above, the message on the ISP bus to the valve control
40 can be to dispense a specific amount of water. Valve control
40 can drive water valve solenoid 44 through a relay or an opto-isolated
triac as is well known in the art. Valve control 40 can track the
amount of water dispensed through the valve and terminate activation
of water valve solenoid 44 when the requested amount of water is
dispensed. Valve control 40 can be ready to respond to a "how
much water have you dispensed" query from the user interface
control 20 and can report the quantity dispensed to the user interface
control 20 via the ISP bus. When the water dispenser is operated
in the normal fill mode, the valve control 40 can energize water
valve solenoid 44 in response to a message from the user interface
control 20 via the ISP bus and can continue to dispense water until
directed to stop by the user interface control 20. The valve control
40 can also track the amount of water dispensed and can provide
information to the user interface control 20 via the ISP bus for
display on the user interface display 22 similar to a gas pump display.
Valve control 40 can also be arranged to dispense a predetermined
measured amount of water to fill an ice maker mold. For example,
valve control 40 can be arranged to dispense 130 cubic centimeters
(cc) of water to the ice maker in response to a message over the
ISP bus. Valve control 40 can include a flash programming port 46
to allow programming of the flash memory in microcontroller 45 for
operation with the brand/model refrigerator freezer for which the
particular control is intended, water filter data, valve calibration
values, ice maker water fill quantity, maximum dispensing periods
and volumes.
[0055] Flow sensor 41 can be connected to microcontroller 45 by
a flow sensor interface circuit 43. Flow sensor interface 43 can
be a well known filter amplifier signal conditioning circuit for
flow sensor 41 that can be a Hall effect sensor as described above.
The flow sensor interface circuit 43 can be arranged to provide
a clean signal (for example pulses) to microcontroller 45 representative
of the volume (for example volume_per_pulse) of water passing through
flow sensor 41 as described above.
[0056] Valve control 40 can be arranged to determine if the flow
sensor 41 has failed and send a signal over the ISP bus. If the
flow sensor 41 fails, valve control 40 can use a time-based algorithm
to fill the icemaker using an assumed flow rate. However, measured
fill operations could not be selected until the flow sensor is repaired.
[0057] The core control 30 can include a day and date clock and
can provide a time of day and date display on the user interface.
In the embodiment shown in FIG. 15 and FIG. 16 the user interface
17'" illustrates the capability of displaying and setting the
correct time and date. Once the clock is set, the core control 30
can be arranged to keep the time of day and date correct. In addition,
the provision of a time of day and date clock in core control 30
can enable provision of additional features described in the following
paragraphs. Core control 30 can provide time of day and date information
to the user interface control 20 via the ISP bus. The user interface
control 20 can be arranged to include a home screen on the user
interface display, see FIG. 16 and can be arranged to provide time
of day and date information when selected by the user. While the
day and date clock has been described as being a function of the
core control 30 those skilled in the art will understand that the
day and date clock function can be provided in the user interface
control 20 as well.
[0058] In-line water filters such as filter 14 shown in FIG. 1
have a effective life that can be predicted based on how long the
filter has been in service and how much water has passed through
the filter. Using the time of day and date clock described in the
previous paragraph and information gathered from the core control
30 the valve control 40 can track the elapsed time since the water
filter 14 has last been changed, and the amount of water passing
through the filter 14 by accumulating information supplied by the
flow sensor 41. The valve control 40 can report the usage and elapsed
time to the user interface control 20 via the ISP bus. User interface
control 20 can drive a filter condition display 25 on user interface
17 as shown on FIG. 8. Another embodiment of a filter condition
display 25' is shown on user interface 17" ", see FIG.
17. In another embodiment, not shown, water filter status can be
displayed using a tri-color indicator that can be a single LED,
a grouping of discrete LEDs or Icons that can be arranged to indicate
Good Filter, Order Filter or Change Filter. In another embodiment,
not shown, the water filter indicator can be a multi-color bargraph
indicator using discrete LEDs or Icons to indicate multiple stages
of Good Filter, Order Filter or Change Filter status. In another
embodiment, not shown, the water filter indicator can be a display
that can indicate gallons remaining combined with Good Filter and
Change Filter displays. Those skilled in the art will understand
that other displays or arrangements can be used to indicate the
water filter status. After a water filter 14 has been replaced,
the user can reset the valve control by touching and holding the
Filter Reset touch pad 21 on user interface 17 in FIG. 8 embodiment,
or the Reset Filter touch pad 21" in the FIG. 17 embodiment.
The touch and hold duration can be preset in the valve control at
a predetermined period such as 3 seconds. The valve control 40 microcomputer
45 can be programmed via the flash programming port 46 to set the
microcontroller to indicate the need to change a filter 14 as a
function of elapsed time and water usage and the type and capacity
of water filter 14 to be used in the brand/model of refrigerator
freezer for which the valve control 40 is to be used.
[0059] Since core control 30 can include a time of day and date
clock, core control 30 can be arranged to detect a power outage
condition and to keep track of the number of hours that the power
has been off. When power is restored the core control 30 can report
a power outage condition to the user interface control 20 for display
in display 22. User interface control 20 can also be arranged to
cause a piezo beeper, not shown, to beep periodically for as long
as the power outage condition is displayed. In order to time the
duration of a power outage the time of day and date clock can be
provided with a back-up battery and can include a reference clock
to allow the core control to accumulate time during the power interruption.
Core control 30 can be arranged to ignore nuisance power outages
such as outages of less than one-hour duration. Likewise, outages
greater than a maximum duration need not be timed. Accordingly,
the minimum and maximum power outage amount can be calibration values
flash programmed into the core control 30 microcontroller, not shown,
and set based on the requirements of the brand/model of refrigerator
freezer in which the core control 30 is to be used. In operation,
a power outage condition and duration can be calculated by the core
control 30 based on the reference clock and can be communicated
to the user interface control 20 via the ISP bus. Once the minimum
power outage time has accumulated, and power has been restored,
the user interface control 20 can cause a power interruption and
duration display on user interface display 22 see FIG. 8. A power
interruption sufficient to cause a power interruption display on
user interface display 22 can "lock out" user interface
control 20 to prevent any user initiated operations of the user
interface control 20 until the power interruption is cleared by
the user. By requiring user intervention to resume normal operation
of the water dispenser, users will be affirmatively advised of the
power interruption condition so that the user can inspect the contents
of the refrigerator freezer for spoilage depending on the duration
of the power interruption. Touching or pressing the Clear touch
pad 21 on user interface 17 can reset the power interruption function
of core control 30. Core control 30 can also report the temperature
in the refrigerator and/or freezer compartment at the end of the
power outage and cause user interface control 20 to display the
maximum temperature(s) reached during the power outage on the user
interface display. Core control 30 can be connected to the refrigerator
freezer control to obtain the compartment(s) temperature information.
[0060] Turning to FIG. 13 and FIG. 14 user interface 17" can
be arranged to display and adjust the temperature in the freezer
compartment and/or the refrigerator compartment. In the embodiment
illustrated in FIG. 13 and FIG. 14 the user interface control can
communicate with a refrigeration control, not shown in the refrigerator
freezer control system to determine the temperature in the refrigerator
and freezer compartments. The user interface control 20 can drive
user interface 17", which as described above can be a touch
screen display, to display temperature information and receive user
input by receiving user selections made by pressing the appropriate
portion of the touch screen display.
[0061] Those skilled in the art will understand that additional
modes of operation of the ice and water dispenser control 15 can
be provided in the user interface, core and valve controls. Examples
of modes of operation can include, but are not limited to: show
room floor mode, manufacturing test mode, lock mode, light modes,
ice modes, and ice dispensing modes of operation.
[0062] While the invention has been specifically described in connection
with certain embodiments thereof, it is to be understood that this
is by way of illustration and not of limitation and the scope of
the appended claims should be construed as broadly as the prior
art will allow. |