Information
-
Patent Grant
-
6273295
-
Patent Number
6,273,295
-
Date Filed
Tuesday, August 31, 199924 years ago
-
Date Issued
Tuesday, August 14, 200122 years ago
-
Inventors
-
Original Assignees
-
Examiners
- Shaver; Kevin
- Bui; Thach H
Agents
- Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
-
CPC
-
US Classifications
Field of Search
US
- 222 67
- 222 1291
- 222 1466
- 222 318
-
International Classifications
-
Abstract
A water system for a beverage dispenser connected to a conventional water source. The water system includes a water tank with a volume of water and a volume of air. The water tank is connected to the conventional water source. A pump is connected to water tank so as to provide the water to the beverage dispenser.
Description
RELATED APPLICATIONS
The following patent applications for related subject matter,
“Modular Beverage Dispenser Components”Ser. No. 09/387,131;
“Mounting Block For Syrup Pump And Accessories”, Ser. No. 09/387,045 and
“Improved Cold Plate” Ser. No. 09/386,700;
all of which are incorporated herein by reference, have been filed concurrently with the present application by the assignee of the present application.
TECHNICAL FIELD
The present application relates generally to beverage dispenser systems, and more particularly relates to a water system having a water tank and a pump for providing consistent water flow and water pressure in a beverage dispenser.
BACKGROUND OF THE INVENTION
Beverage dispensers of various configurations are well known in the art. A beverage dispenser generally includes a series of syrup circuits and water circuits. The syrup circuits generally include an incoming syrup line, a syrup pump, and a series of syrup cooling coils. The syrup cooling coils are generally positioned within an ice water bath or a cold plate so as to cool the syrup to the appropriate temperature. The source of the syrup may be a bag-in-box, a figal, a syrup tank, or any other type of conventional syrup source. The water circuits generally include an incoming water line, a water pump, a carbonator, and a series of water cooling coils. The water cooling coils also are positioned within the ice water bath or the cold plate so as to chill the water. The source of the water is generally tap water or any other type of conventional water source. The carbonator adds carbon dioxide bubbles to the incoming water stream so as to produce soda water. The syrup circuits and the water circuits are then joined at a dispensing valve for mixing. The beverage is then dispensed through the dispensing valve nozzle.
The reliability and consistency of any given beverage dispenser depends in part on an adequate and uniform incoming water flow and water pressure. For example, an inconsistent water flow or water pressure leading to the beverage dispenser can easily cause the internal water pump to fail. Such a failure generally requires the entire beverage dispenser to be taken out of service for repair. Further, even if the water pump does not fail, an inconsistent water flow or water pressure may lead to the beverage dispenser providing an inconsistent beverage in that the proportions of water and syrup may be altered from the norm. Such an inconsistent beverage may not taste the same to a consumer and leave that consumer unsatisfied.
Another problem caused by an inconsistent water flow or water pressure leading to the beverage dispenser is the possibility of back flow within the system. The incoming water line is generally made out of copper tubing. The elements of the beverage dispenser from the carbonator onward, however, are generally made out of stainless steel or similar types of non-corrosive or non-reactive materials. Stainless steel is used because of the tendency of copper to react with the carbon dioxide within the soda water. Any back flow pressure in the system may cause the soda water to travel out of the carbonator back towards the copper tubing. Such a back flow generally also requires the entire beverage dispenser to be taken out of service so as to inspect or replace the copper lines. To date, this potential problem has been addressed with the use of a number of reduced pressure zone valve or a double vent check valve. These valves generally eliminate or at least reduce the possibility of back flow out of the carbonator. These back flow preventors, however, can be somewhat expensive and may not be entirely reliable.
What is needed therefore, is a means for providing a reliable and consistent water flow and water pressure to a conventional beverage dispenser. Such a constant water flow and water pressure should prevent pump failure and also should prevent the possible back flow of soda water. This water flow and water pressure, however, must be provided in a safe and relatively inexpensive beverage dispensing system.
SUMMARY OF THE INVENTION
The present invention thus provides a water system for a beverage dispenser connected to a conventional water source. The water system includes a water tank with a given volume of water and a given volume of air. The water tank is connected to the conventional water source. A pump is connected to water tank so as to provide the water to the beverage dispenser.
Specific embodiments of the present invention include a stainless steel or plastic water tank. The volume of the tank may depend upon the size, number, and volume of the overall beverage dispenser system. Specifically, if the beverage dispenser provides an average of about eight (8), twenty-four (24) ounce servings over a ten (10) minute period at a desired temperature, the tank may have a volume of about two (2) to about five (5) gallons or more. The volume of air may be about ten (10) to about fifteen (15) percent of the water tank. The volume of water may be at atmospheric pressure.
The water system may further include an incoming water line connecting the water tank to the conventional water source. The incoming water line may be copper, stainless steel, or other types of substantially non-corrosive materials. The incoming water line may have a control valve thereon so as to open and close the line. The water tank may have a float control device in communication with the control valve, such that the float control device controls the control valve on the incoming water line. The float control device may include a switch and a float. The switch may be a magnetic sensor and the float may be an expanded polystyrene with a magnet positioned therein. The float control device opens the control valve on the incoming water line as the water level in the water tank drops.
The water system may further include an outgoing water line and a water relief line connecting the tank and the pump. More than one pump may be used. The pump may be a positive displacement pump such as a diaphragm vane pump or similar devices. The pump may be a variable speed pump with a flow rate of about two (2) to about six (6) gallons per minute. The water system may further include a dispenser line connecting the pump and the beverage dispenser. The dispenser line may have a pressure switch positioned therein so as to control the pump. The pressure switch may be a pressure transducer. The dispenser line may have a length of up to about 150 feet. The dispenser line may have an adjustable relief valve positioned thereon. The adjustable relief valve may include a return line in communication with the water tank.
A further embodiment of the present invention provides for a beverage dispenser in communication with a conventional water source. The beverage dispenser includes a water tank in communication with the conventional water source. The beverage dispenser also includes a pump in communication with the water tank and a water circuit in communication with the pump. The water from the conventional water source flows into the tank and through the pump to the water circuit. The water circuit may include a means for cooling the water flowing therein. These means may include a cold plate or a number of water cooling coils. The water circuit also may include a soda water circuit, a plain water circuit, and a number of beverage dispensing valves. The plain water circuit may be copper or stainless steel. The soda water circuit may be stainless steel. The soda water circuit may include a carbonator unit.
The method of the present invention provides water to a beverage dispenser from a conventional water source. The method includes the steps of filling a water tank with water from the conventional water source, pumping a first predetermined volume of the water by a pump to the beverage dispenser so as to provide a beverage, and then refilling the water tank with a second predetermined volume of water from the conventional water source such that the pump always has an available volume of the water regardless of the nature of the water source.
Other objects, features, and advantages of the present invention will become apparent upon review of the following detailed description of the preferred embodiments of the invention, when taken in conjunction with the drawings and the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a side cross-sectional view of the water tank of the present invention.
FIG. 2
is a schematic view the water tank and the water pump system of the present invention.
FIG. 3
is a schematic view of beverage dispenser of the present invention downstream of the water tank and the water pump system.
DETAILED DESCRIPTION OF THE INVENTION
Referring now in more detail to the drawings, in which like numerals refer to like elements throughout the several views,
FIG. 1
shows a water tank
100
of the present invention. The tank
100
may be of any conventional shape used to hold a given volume of water. The tank
100
may be open-ended or enclosed. The tank
100
is preferably made from stainless steel, plastic, or other types of substantially non-corrosive materials. The size of the tank
100
depends upon the size, number, and volume of the overall beverage dispenser system. The tank
100
will generally range in size from about two (2) gallons to about five (5) gallons or more. For example, a tank
100
of about two (2) gallons in size may be used with a beverage dispenser having about six (6) dispensing nozzles to produce an average of about eight (8), twenty-four (24) ounce servings over about a ten (10) minute period at the desired temperature.
The tank
100
may have a number of fluid lines or conduits
110
attached thereto. The size or diameter of the conduits
110
also depends upon the size, number, and volume of the overall beverage dispenser system. In general, these conduits
110
may be about ⅜ inches or larger in inside diameter. Because the conduits
110
at this point do not come in contact with the carbon dioxide of the soda water, some or all of the conduits
110
may be made out of copper. Stainless steel, plastic, or other types of substantially non-corrosive materials also may be used.
The conduits
110
generally include an incoming water line
120
. The incoming water line
120
is connected to a source of tap water or other conventional types of water sources. The incoming water line
120
may have a control valve
125
thereon. The control valve
125
opens and closes the incoming water line
120
on demand. The control valve
125
may be any type of conventional mechanical or electrical valve, such as a solenoid valve or other types of controllable valves. The tank
100
may further include an outgoing water line
130
and a water relief line
140
. The outgoing water line
130
and the water relief line
140
are connected to the remaining tank and water pump system components as described in more detail below. Finally, the tank
100
may have an overflow drain line
150
. The overflow drain line
150
may be connected to a conventional drain or other type of outgoing water system.
Positioned within the tank
150
is a given volume of water
160
and a given volume of an air space
170
. The air space
170
may be about ten (10) to about fifteen (15) percent of the volume of the entire water tank
100
. The air space
170
ensures that the water
160
within the tank
100
remains constantly and consistently at atmospheric pressure. The water
160
within the water tank
100
should not be pressurized beyond atmospheric pressure.
Also positioned within the tank
100
is a float control device
180
. The float control device
180
controls the operation of the incoming water line
120
and the control valve
125
. The float control device
180
may be any conventional type of mechanical or electrical device. The float control device
180
may be similar to those used in conventional carbonator tanks. The float control device
180
preferably includes a switch
190
and a float
200
. The switch
190
may be a magnetic sensor or any type of conventional mechanism that breaks or creates an electrical circuit when activated. A conventional contact switch also may be used. The float
200
may be any type of conventional buoyant material such as an expanded polystyrene. The float
200
may be positioned near the switch
190
along a bar
210
. The bar
210
may be any type of elongated rod or may be made from a flexible material such that the float
200
may be inserted thereon. The float
200
also may include a magnet
220
positioned therein. The magnet
220
may be any type of conventional magnetic or magnetizable metal material. The float
200
rises and falls with the level of the water
160
within the tank
100
.
The switch
190
is activated as the magnet
220
within the float
200
moves up and down with the changing level of the water
160
within the tank
100
. As the level of the water
160
declines, the float
200
moves away from the switch
190
such that the switch
190
activates the control valve
125
on the incoming water line
120
. The control valve
125
and the water line
120
remain open until the level of the water
160
within the tank
100
rises and again brings the float
200
in contact with or near to the switch
190
. The switch
190
then closes the control valve
125
on the incoming water line
120
. The control valve
125
and the water line
120
remain closed until the level of the water
160
within the tank
100
drops.
FIG. 2
shows a tank and pump system
250
of the present invention. The tank and pump system
250
includes the water tank
100
as described above as well as a pump
260
. The pump
260
may be any type of conventional device. A preferred pump
260
is a positive displacement pump. For example, a multi-piston diaphragm vane pump may be used. A preferred vane pump is manufactured by SHURflo Manufacturing of Santa Ana, Calif. Other types of conventional pumps may be used, such as a centrifugal pump or a similar types of pumps. More than one pump may be used. The speed of the pump
260
is preferably proportional to the flow rate therethrough. The pump
260
may have a flow rate of about two (2) to six (6) gallons per minute depending upon the size, number, and volume of the overall beverage dispenser system The pump
260
may be capable of many different flow rates.
The pump
260
is connected to the water tank
100
via the outgoing water line
130
. A conventional check valve
270
may be positioned on the outgoing water line
130
between the water tank
100
and the pump
260
. The check valve
270
may be of conventional design. The check valve
270
may be used to halt the fluid flow through the outgoing water line
130
if needed. The outgoing water line
130
may have an inside diameter of about
3
/
8
inches or more.
After passing through the pump
260
, the water
160
flows through a pump line
280
. The pump line
280
also may have an inside diameter of about ⅜ inches or more. A pressure switch
290
may be positioned on the pump line
280
. The pressure switch
290
is in communication with the pump
260
. The pressure switch
290
monitors the water pressure within the pump line
280
so as to control the pump
260
. When the pressure within the pump line
280
drops, the pump
260
is turned on to maintain the desired pressure. The pressure switch
290
may be of a conventional mechanical or electrical design. Alternatively, the pressure switch
290
may be a conventional pressure transducer The pressure transducer not only turns the pump
260
on and off, but also varies the speed of the pump
260
so as to maintain the desired pressure.
The pump line
280
may be connected to one or more T-valves
300
. The T-valves
300
may be conventional multi-directional valves. Each T-valve
300
leads to a cooling line
310
connected to the cooling system of the beverage dispenser. The T-valves
300
and the cooling lines
310
may be made out of copper, stainless steel, or other types of substantially non-corrosive materials. The number of T-valve
300
used depends upon the size, number, and volume of the overall beverage dispenser system. The cooling lines
310
may have an inside diameter of about ⅜ inches or more.
The pump line
280
also may have an adjustable relief valve
320
positioned thereon downstream of the T-valves
300
. The adjustable relief valve
320
is connected to both the pump line
280
and the water relief line
140
. Any water
160
that does not travel through one of the T-valves
300
may be routed through the water relief line
140
back to the water tank
100
. The adjustable relief valve
320
may be a spring-balanced piston that opens and closes to maintain a constant pressure output. Any conventional type of mechanical or electrical device may be used. Further, the relief valve
320
may not be needed if a pressure transducer is used as the pressure switch
290
.
The tank and pump system
250
may be distinct from the remainder of the beverage dispenser system. In fact, the tank and pump system
250
may be up to about 150 feet away from the remainder of the beverage dispenser depending upon the size of the pump
260
and the overall beverage dispenser system. The tank and pump system
250
therefore may be set upon in the “backroom” while the beverage dispenser is in a distinct location to serve the consumer.
FIG. 3
shows a beverage dispenser
350
for use with the present invention. The beverage dispenser
350
is largely of conventional design. The beverage dispenser
350
includes a syrup and water cooling system such as a cold plate
360
. The cold plate
360
is also of conventional design. The cold plate
360
is generally positioned beneath an ice bath for heat transfer between the water flowing therethrough and the ice of the ice bath as is known to those skilled in the art. Alternatively, a series of water cooling coils could be used in place of the cold plate
360
. The cold plate
360
chills the water
160
flowing from the tank and pump system
250
via the cooling lines
310
.
The cold plate
360
is connected to an outflow line
370
. The outflow line
370
may lead to a manifold
380
depending upon the configuration of the beverage dispenser
350
as a whole. The outflow line
370
may be about ⅜ inches or more in inside diameter and may be made from copper, stainless steel, or other types of substantially non-corrosive materials. The outflow line
370
then leads to an outflow line T-valve
390
. The T-valve
390
is also a conventional multi-directional valve. One end of the T-valve
390
is connected to a plain water line
400
while the other end of the T-valve
390
is connected to a soda water line
410
.
The plain water line
400
leads to one or more plain water dispensing valves
420
. The plain water line
400
may be made out of copper, stainless steel, or other types of substantially non-corrosive materials. The plain water dispensing valves
420
may mix the plain water with a syrup or a concentrate as is known to those skilled in the art. Alternatively, the dispensing valves
420
may dispense the plain water directly. The dispensing valves
420
may be of conventional design. An adjustable relief valve
430
may be positioned on the plain water line
400
before the plain water dispensing valves
420
. As described above, the adjustable relief valve
430
ensures a constant pressure output.
The soda water line
410
may lead to a conventional carbonator unit
440
. Because the soda water line
410
is connected to the carbonator unit
440
, the soda water line may be made out of stainless steel or other types of substantially non-corrosive and non-reactive materials. The carbonator unit
440
may be of conventional design. The carbonator unit
440
mixes the water
160
from the soda water line
410
with carbon dioxide gas from a carbon dioxide line
450
so as to produce soda water. The carbonator tank
440
also may be chilled. Positioned on the soda water line
410
may be a check valve
460
and a carbonator solenoid valve
470
. The check valve
460
may be of conventional design. The check valve
460
may stop the flow of water through the soda water line
410
if needed. The carbonator solenoid valve
470
controls the input and the operation of the carbonator tank
440
as is well known to those skilled in the art.
The soda water from the carbonator tank
440
then exits via a carbonated dispensing valve line
480
to the carbonated dispensing valves
490
. The carbonated dispensing valve line
480
may be made out of stainless steel or other types of substantially non-corrosive and non-reactive materials. The soda water mixes with a concentrate or a syrup within the carbonating dispensing valves
490
as is well known to those skilled in the art so as to produce a beverage such as a carbonated soft drink. Alternatively, the dispensing valves
490
may dispense the soda water directly. The carbonated dispensing valves
490
may be of conventional design.
In use, the water tank and pump system
250
is activated whenever a beverage dispensing valve
420
,
490
is activated. The pressure switch
290
determines a drop in pressure within the pump line
280
. The pressure switch
280
therefore turns the pump
260
on or changes the speed of the pump
260
depending upon the demand on the beverage dispenser
350
as a whole. As the pump
260
is operated, the water level within the water tank
100
drops. The float valve
180
detects this drop and opens up the control valve
125
on the incoming water line
120
. The incoming water line
120
remains open until the water tank
100
is again full. Because of the use of the water tank
100
, the beverage dispenser
350
in general and the pump
260
in specific does not depend upon the incoming water line
120
to provide a constant water flow or constant water pressure.
The combination of the water tank
100
and the pump
260
therefore provide a consistent and constant flow of water to the beverage dispenser
350
. Specifically, the tank and pump system
250
provides a constant water source at a constant water pressure at all times for the beverage dispenser
350
. The volume of the water
160
and the airspace
170
within the water tank
100
ensure that the pump
260
has a constant water supply at a constant atmospheric pressure. This constant pressure reduces the possibility of pump failure and also largely eliminates the danger of back flow. Irregularities in the incoming water flow or water pressure, if any, are compensated by the water
160
already present within the tank
100
. The use of the float valve
180
and the control valve
125
on the incoming water line valve
120
ensure that the tank
100
remains sufficiently filled with water
160
so as to accommodate the dispensing valves
420
,
490
.
The pump
260
also provides a sufficient amount of water to the dispensing valves
420
,
490
in a simplified system. The speed of the pump
260
may change as the function of the demanded flow. The single pump
260
can therefore accommodate both the plain water dispensing valve
420
and the carbonated water dispensing valve
490
.
It should be apparent that the foregoing relates only to the preferred embodiments of the present invention and that numerous changes and modifications may be made herein without departing from the spirit and scope of the invention as defined by the following claims.
Claims
- 1. In combination, a water system and a beverage dispenser connected to a pressurized water source, the pressure of which varies, comprising:a water tank; said water tank comprising a volume of water and a volume of air; said volume of water being at atmospheric pressure; said water tank being connected downstream to said pressurized water source; and a pump connected downstream to said water tank, said pump providing water to said beverage dispenser at a substantially constant pressure.
- 2. The water system of claim 1, wherein said tank comprises stainless steel or plastic.
- 3. The water system of claim 1, wherein said tank comprises about two (2) gallons to about five (5) gallons or more.
- 4. The water system of claim 3, wherein said beverage dispenser comprises a plurality of dispensing nozzles for providing an average of about eight (8) twenty-four (24) ounce servings over a ten (10) minute period at a desired temperature and wherein said tank comprises about two (2) gallons.
- 5. The water system of claim 1, further comprising an incoming water line connecting said water tank to said conventional water source.
- 6. The water system of claim 5, wherein said incoming water line comprises copper, stainless steel, or other types of substantially non-corrosive materials.
- 7. The water system of claim 5, wherein said incoming water line comprises a control valve thereon so as to open and close said incoming water line.
- 8. The water system of claim 7, wherein said water tank comprises a float control device in communication with said control valve, such that said float control device controls said control valve on said incoming water line.
- 9. The water system of claim 8, wherein said float control device comprises a switch and a float.
- 10. The water system of claim 9, wherein said switch comprises a magnetic sensor.
- 11. The water system of claim 9, wherein said float comprises an expanded polystyrene and a magnet positioned therein.
- 12. The water system of claim 1, further comprising an outgoing water line connecting said tank and said pump.
- 13. The water system of claim 1, wherein said volume of air comprises about ten (10) to fifteen (15) percent of said water tank.
- 14. The water system of claim 1, wherein said pump comprises a positive displacement pump.
- 15. The water system of claim 14, wherein said pump comprises a diaphragm vane pump.
- 16. The water system of claim 1, wherein said pump comprises a flow rate of about two (2) to about six (6) gallons per minute.
- 17. The water system of claim 1, wherein said pump comprises variable speed pump.
- 18. The water system of claim 1, further comprising a dispenser line connecting said pump and said beverage dispenser.
- 19. The water system of claim 18, wherein said dispenser line comprises a pressure switch positioned therein so as to control said pump.
- 20. The water system of claim 18, wherein said pressure switch comprises a pressure transducer.
- 21. The water system of claim 18, wherein said dispenser line comprises a length up to about 150 feet.
- 22. The water system of claim 18, wherein said dispenser line comprises an adjustable relief valve positioned thereon.
- 23. The water system of claim 22, further comprising a return line such that said adjustable relief valve is in communication with said water tank.
- 24. In combination, a water system and a beverage dispenser in communication with a pressurized water source, comprising:a water tank; said water tank comprising a volume of water and a volume of air; said volume of water being at atmospheric pressure; said water tank being connected downstream from and in communication with said pressurized water source; a pump downstream from and in communication with said water tank; and a water circuit downstream from and in communication with said pump, said water circuit including at least one of means for cooling water, a soda water circuit, a plain water circuit, and beverage dispensing valves, wherein water from said pressurized water source flows into said tank and through said pump to said water circuit.
- 25. The beverage dispenser of claim 24, wherein said water circuit comprises a means for cooling the water flowing within said water circuit.
- 26. The beverage dispenser of claim 24, wherein said water circuit comprises a soda water circuit and a plain water circuit.
- 27. The beverage dispenser of claim 26, wherein said plain water circuit comprises copper or stainless steel.
- 28. The beverage dispenser of claim 26, wherein said soda water circuit comprises a carbonator unit.
- 29. The beverage dispenser of claim 26, wherein said soda water circuit comprises stainless steel.
- 30. The beverage dispenser of claim 24, wherein said water circuit comprises a plurality of beverage dispensing valves.
- 31. A method of providing water to a beverage dispenser from a pressurized water source, comprising:filling a water tank with water from a pressurized water source, the pressure of which may vary; maintaining a predetermined volume of air space in the tank such that the volume is maintained at atmospheric pressure; pumping a first predetermined volume of the water from the tank, through the pump and to the beverage dispenser at a substantially constant pressure so as to provide a beverage; and refilling the water tank with a second predetermined volume of water from the pressurized water source such that the pump has an available volume of said water at said atmospheric pressure.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2178395 |
Feb 1987 |
GB |
2267891 |
Dec 1993 |
GB |