CA2637861A1 - Keg beer cooling and dispensing line - Google Patents
Keg beer cooling and dispensing line Download PDFInfo
- Publication number
- CA2637861A1 CA2637861A1 CA 2637861 CA2637861A CA2637861A1 CA 2637861 A1 CA2637861 A1 CA 2637861A1 CA 2637861 CA2637861 CA 2637861 CA 2637861 A CA2637861 A CA 2637861A CA 2637861 A1 CA2637861 A1 CA 2637861A1
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- CA
- Canada
- Prior art keywords
- beer
- line
- propylene glycol
- cooling
- cooling device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/08—Details
- B67D1/0857—Cooling arrangements
- B67D1/0858—Cooling arrangements using compression systems
- B67D1/0861—Cooling arrangements using compression systems the evaporator acting through an intermediate heat transfer means
- B67D1/0865—Cooling arrangements using compression systems the evaporator acting through an intermediate heat transfer means by circulating a cooling fluid along beverage supply lines, e.g. pythons
- B67D1/0867—Cooling arrangements using compression systems the evaporator acting through an intermediate heat transfer means by circulating a cooling fluid along beverage supply lines, e.g. pythons the cooling fluid being a liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2331/00—Details or arrangements of other cooling or freezing apparatus not provided for in other groups of this subclass
- F25D2331/80—Type of cooled receptacles
- F25D2331/802—Barrels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
- F25D31/006—Other cooling or freezing apparatus specially adapted for cooling receptacles, e.g. tanks
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Devices For Dispensing Beverages (AREA)
Abstract
The utility invention relates to food industry and can be used for cooling and dispensing of beverages in cafes, bars, restaurants and other catering establishments.
Description
Keg beer cooling and dispensing line Field of the Invention The utility invention relates to beverage cooling systems or lines. Such lines are installed at cafes, bars, restaurants and other catering establishments for cooling and dispensing of beverages, including keg beer.
Background of the Invention Numerous keg beer cooling and dispensing devices and systems are known, such as PRE-MIX system for semi-finished product, namely, keg beer that before usage should be saturated with carbon dioxide (carbonated) and cooled to dispensing temperature of 6 to 10 C
depending on beer grade. Such systems may be installed above or under dispensing stand.
The above-stand set of equipment has small dimensions and can dispense 10 to liters per hour of one or two, sometimes tluee, beer grades. Beer cooling and dispensing systems installed under the stand are larger and more expensive, their capacity being in the range of 25 to 250 liters per hour, serving two to fourteen grades of beer.
Many bars and similar outlets possess beer distribution systems. Beer is stored in kegs witliin a large cooling chamber or a small refrigerating chamber. Dispensing columns are comlected to one or more beer lines joined to one or more beer distribution hoses depending on the number of beer grades. Beer distribution hoses come from the cooler to dispensing elements. Each beer hose should be connected to supply system that distributes a grade of beer to various dispensing elements at the bar. Additionally to beer dispensing hoses, usually one or more cooling hoses come along beer dispensing hoses from cooling chamber to final dispensers. Those cooling hoses usually run nearby beer dispensing hoses, sometimes they form rings or spirals around beer dispensing hoses. Cooling hoses serve to maintain beer cool as it is fed from kegs to beer distribution tower at cooling chamber.
Beer coolers may be water (running) or dry cooled. In the first case water is poured into a tub and cooled by compressor. Coils witli beer within and a pump are submerged into the water tub, the pump takes off cold water and pumps it along a separate pipeline running parallel to beer line up to dispenser, thus, beer is accompanied by cold water and dispensed in cold state. This system is called "python". In dry-type beer coolers the tub containing beer lines and cooling loop is filled with a special gel or aluminum. Dry beer coolers reach operational condition faster, they can operate 7-10 minutes after switcliing, whereas water coolers need more than one hour to attain their freezing capacity. At the same time dry coolers are much more expensive and, therefore, their usage is quite limited. Beer cooling and dispensing equipment has nominal seivice life at least 6-8 years with the proviso of continuous maintenance. Cooler capacity lies within 30 to 1801iters per hour. Most popular at roll bars are two-grade beer coolers producing 60 liters per hour. In areas with suminer ambient temperature above 30 C special large-size "TROPIC" coolers operate at sufficiently large establishments.
Fluid cooling device, dispensing apparatus for cooled fluid containing same, and process of sterilization tliereof (Russian Application N2 2005122473 of 2007.01.27).
comprises a primary heat exchanger; secondary heat exchanger; first pipeline with circulating cooled fluid; coolant transferring cooling energy to fluid to be cooled circulating in the first pipeline; primary and secondary heat exchangers being situated at least in part within one another.
This device may cool beverages, including beer, but it has some substantial drawbacks.
Its design is too complicated, which hampers installation at small bars or restaurants that do not have sufficient area to arrange all elements of this equipment. The device, complicated and bulky as it is, is unable to maintain beer cooled along the hose and does not enable to vary hose length in the course of installation and commissioning. In this device the beer hose length is fixed at engineering project, and in case of this length being changed additional design engineering is necessary.
The closest solution to this utility invention as regards the technical essence and expected result is described in application Beverage dispensing system linear amplifien> (see WO/2004/16545 of 26.02.2004) by ICEFLOE TECHNOLOGIES INC. [CA/CA]). In this solution a beverage cooling and dispensing systezn comprises:
- a source of beverage;
- at least one beverage distributing element;
Background of the Invention Numerous keg beer cooling and dispensing devices and systems are known, such as PRE-MIX system for semi-finished product, namely, keg beer that before usage should be saturated with carbon dioxide (carbonated) and cooled to dispensing temperature of 6 to 10 C
depending on beer grade. Such systems may be installed above or under dispensing stand.
The above-stand set of equipment has small dimensions and can dispense 10 to liters per hour of one or two, sometimes tluee, beer grades. Beer cooling and dispensing systems installed under the stand are larger and more expensive, their capacity being in the range of 25 to 250 liters per hour, serving two to fourteen grades of beer.
Many bars and similar outlets possess beer distribution systems. Beer is stored in kegs witliin a large cooling chamber or a small refrigerating chamber. Dispensing columns are comlected to one or more beer lines joined to one or more beer distribution hoses depending on the number of beer grades. Beer distribution hoses come from the cooler to dispensing elements. Each beer hose should be connected to supply system that distributes a grade of beer to various dispensing elements at the bar. Additionally to beer dispensing hoses, usually one or more cooling hoses come along beer dispensing hoses from cooling chamber to final dispensers. Those cooling hoses usually run nearby beer dispensing hoses, sometimes they form rings or spirals around beer dispensing hoses. Cooling hoses serve to maintain beer cool as it is fed from kegs to beer distribution tower at cooling chamber.
Beer coolers may be water (running) or dry cooled. In the first case water is poured into a tub and cooled by compressor. Coils witli beer within and a pump are submerged into the water tub, the pump takes off cold water and pumps it along a separate pipeline running parallel to beer line up to dispenser, thus, beer is accompanied by cold water and dispensed in cold state. This system is called "python". In dry-type beer coolers the tub containing beer lines and cooling loop is filled with a special gel or aluminum. Dry beer coolers reach operational condition faster, they can operate 7-10 minutes after switcliing, whereas water coolers need more than one hour to attain their freezing capacity. At the same time dry coolers are much more expensive and, therefore, their usage is quite limited. Beer cooling and dispensing equipment has nominal seivice life at least 6-8 years with the proviso of continuous maintenance. Cooler capacity lies within 30 to 1801iters per hour. Most popular at roll bars are two-grade beer coolers producing 60 liters per hour. In areas with suminer ambient temperature above 30 C special large-size "TROPIC" coolers operate at sufficiently large establishments.
Fluid cooling device, dispensing apparatus for cooled fluid containing same, and process of sterilization tliereof (Russian Application N2 2005122473 of 2007.01.27).
comprises a primary heat exchanger; secondary heat exchanger; first pipeline with circulating cooled fluid; coolant transferring cooling energy to fluid to be cooled circulating in the first pipeline; primary and secondary heat exchangers being situated at least in part within one another.
This device may cool beverages, including beer, but it has some substantial drawbacks.
Its design is too complicated, which hampers installation at small bars or restaurants that do not have sufficient area to arrange all elements of this equipment. The device, complicated and bulky as it is, is unable to maintain beer cooled along the hose and does not enable to vary hose length in the course of installation and commissioning. In this device the beer hose length is fixed at engineering project, and in case of this length being changed additional design engineering is necessary.
The closest solution to this utility invention as regards the technical essence and expected result is described in application Beverage dispensing system linear amplifien> (see WO/2004/16545 of 26.02.2004) by ICEFLOE TECHNOLOGIES INC. [CA/CA]). In this solution a beverage cooling and dispensing systezn comprises:
- a source of beverage;
- at least one beverage distributing element;
2 - at least one distributing hose for beverage supply from the source to the distributing element with heat transfer element disposed separate from beverage source for submersion of at least distributing hose to cooling tub.
Heat transfer element prevents heating of beverage, such as beer, due to large distance between distributing beverage lines. Besides, heat transfer element in ready condition includes a chamber that defines capacity. The first inlet pipe introduces cooling fluid into the chamber.
First inlet pipe and first outlet pipe are not connected within the chamber so that cooling fluid might accumulate within the chamber space.
The second pipe in the chamber includes inlet and outlet openings on chamber surface.
The second pipe passes throughout the whole chamber to separate it from cooling fluid within the chamber.
The system also conlprises a heat transfer element for beverage distribution system wherein the source of beverage is arranged at some distance from beverage distribution element, the beverage being fed thereto along the beer distributing line.
This solution refers to both beer dispensiag and beer cooling systems installed at bars and able to cool the beverage and to reduce its foaming during dispensing.
Nevertheless, this solution also has a number of substantial drawbacks. The inventors state that this system is able to maintain beer temperature at dispenser outlet at the level of about 28 F (equivalent to - 2.22 C), which is only a medium point of claimed beer cooling temperature range (-5 C to -0.5 C). But, as the temperature of cooling fluid in the device under WO/2004/16545 of 26.02.2004 is 32-34 F (0-1,(1) C) we cannot understand how the claimed beer temperature at dispenser outlet - near 28 F (equivalent to - 2.22 C) may be attained. Besides, the inventor of WO/2004/16545 of 26.02.2004 claims beer temperature at dispenser outlet near 28 F (equivalent to - 2.22 C), whereas according to "Manufacturing process of special beer "BALTIKA Honey Strong "(see Russian Patent Ns 2186841) ready beer before clarification by filtering through kieselguhr is clarified in separators and then deeply refrigerated up to (-0.5) -(-3) C...... Beer refrigeration temperature up to Ao (-3) C is met in other sources of infomiation and patent documents as well. Beer cooling up to (-4) C is also known. Thus, it is quite evident that beer does not have a constant freezing point =28 F
Heat transfer element prevents heating of beverage, such as beer, due to large distance between distributing beverage lines. Besides, heat transfer element in ready condition includes a chamber that defines capacity. The first inlet pipe introduces cooling fluid into the chamber.
First inlet pipe and first outlet pipe are not connected within the chamber so that cooling fluid might accumulate within the chamber space.
The second pipe in the chamber includes inlet and outlet openings on chamber surface.
The second pipe passes throughout the whole chamber to separate it from cooling fluid within the chamber.
The system also conlprises a heat transfer element for beverage distribution system wherein the source of beverage is arranged at some distance from beverage distribution element, the beverage being fed thereto along the beer distributing line.
This solution refers to both beer dispensiag and beer cooling systems installed at bars and able to cool the beverage and to reduce its foaming during dispensing.
Nevertheless, this solution also has a number of substantial drawbacks. The inventors state that this system is able to maintain beer temperature at dispenser outlet at the level of about 28 F (equivalent to - 2.22 C), which is only a medium point of claimed beer cooling temperature range (-5 C to -0.5 C). But, as the temperature of cooling fluid in the device under WO/2004/16545 of 26.02.2004 is 32-34 F (0-1,(1) C) we cannot understand how the claimed beer temperature at dispenser outlet - near 28 F (equivalent to - 2.22 C) may be attained. Besides, the inventor of WO/2004/16545 of 26.02.2004 claims beer temperature at dispenser outlet near 28 F (equivalent to - 2.22 C), whereas according to "Manufacturing process of special beer "BALTIKA Honey Strong "(see Russian Patent Ns 2186841) ready beer before clarification by filtering through kieselguhr is clarified in separators and then deeply refrigerated up to (-0.5) -(-3) C...... Beer refrigeration temperature up to Ao (-3) C is met in other sources of infomiation and patent documents as well. Beer cooling up to (-4) C is also known. Thus, it is quite evident that beer does not have a constant freezing point =28 F
3 (or - 2.22 C) as inventors of WO/2004/16545 of 26.02.2004 claim; beer freezing point depends from composition, den.sity and other parameters of different grades.
Thus, the following reasons lie in the background of the novel keg beer cooling and dispensing line.
1. Traditional "wet" or "running" type beer coolers cannot maintain stable product temperature at cooler outlet. Therein the stability of temperature maintenance depends on depletion of accumulated ice bank, i.e. as the accumulated ice bank depletes, beer temperature at cooler outlet increases. To restore the depleted ice a substantial period of time is necessary, 40 minutes and more, which is unfavorable for stability of beer temperature at cooler outlet.
Dry block devices proposed as additional beer coolers possess substantially accurate maintenance of aluminum dry block teinperature and are quickly restored. This circumstance is in favor of stable maintenance of the product exit teinperature.
2. Traditional coolers are installed either above or under bar stand and all are equipped with air condensers. We propose herein to use a dry block cooler, its dimensions being equal to those of a small above-stand cooler, bit disposed under the stand, thus saving important space of bar stand and underneath. Our cooler is equipped with a water condenser to avoid excessive heat release under or above the stand, as it is usual in traditional air condensers.
Excessive heat release created by traditional air condensers makes uncomfortable environment for bartender and customers by heating the space near bar stand. It is especially felt in summer. The heated air surrouuding the stand is also unfavorable for adequate operation of other bar equipment: juice cooler, ice generator, etc.
Besides, water condenser permits a more stable cooler cycle. The operation of any refrigerating machine depends on ambient temperature. Any condenser of refrigerating macliine is a heat-emitting element of refrigerating loop, so it should be cooled. In case of its cooling due to ambient air circulation perfonned by condenser fan it is called "air eondenser".
Under sufficiently high temperature of ambient air at condenser entrance, as in summer, condenser cooling becomes inadequate and the productivity of refrigerating machine reduces.
Summary of the Invention
Thus, the following reasons lie in the background of the novel keg beer cooling and dispensing line.
1. Traditional "wet" or "running" type beer coolers cannot maintain stable product temperature at cooler outlet. Therein the stability of temperature maintenance depends on depletion of accumulated ice bank, i.e. as the accumulated ice bank depletes, beer temperature at cooler outlet increases. To restore the depleted ice a substantial period of time is necessary, 40 minutes and more, which is unfavorable for stability of beer temperature at cooler outlet.
Dry block devices proposed as additional beer coolers possess substantially accurate maintenance of aluminum dry block teinperature and are quickly restored. This circumstance is in favor of stable maintenance of the product exit teinperature.
2. Traditional coolers are installed either above or under bar stand and all are equipped with air condensers. We propose herein to use a dry block cooler, its dimensions being equal to those of a small above-stand cooler, bit disposed under the stand, thus saving important space of bar stand and underneath. Our cooler is equipped with a water condenser to avoid excessive heat release under or above the stand, as it is usual in traditional air condensers.
Excessive heat release created by traditional air condensers makes uncomfortable environment for bartender and customers by heating the space near bar stand. It is especially felt in summer. The heated air surrouuding the stand is also unfavorable for adequate operation of other bar equipment: juice cooler, ice generator, etc.
Besides, water condenser permits a more stable cooler cycle. The operation of any refrigerating machine depends on ambient temperature. Any condenser of refrigerating macliine is a heat-emitting element of refrigerating loop, so it should be cooled. In case of its cooling due to ambient air circulation perfonned by condenser fan it is called "air eondenser".
Under sufficiently high temperature of ambient air at condenser entrance, as in summer, condenser cooling becomes inadequate and the productivity of refrigerating machine reduces.
Summary of the Invention
4 The aim of proposed solution is development of a keg beer cooling and dispensing line able to ensure beer cooling during its travel along beer feed line as well as a stable temperature in the range of -5 C to -0.5 C at dispenser entrance.
The solution is based on the task to improve a keg beer cooling and dispensing line coinprising a dispenser, connecting beer feed line in the form of a python hose, keg beer storage chamber, necessary and sufficient number of beer kegs, basic cooling device LCB -200G POLAR, so that in accordance with the utility invention the line additionally comprises a second cooling device LCB - 200D POLAR, forming a part of the general keg beer refrigeration and dispensing loop, water condenser of additional cooling device is cooled with propylene glycol whose adequate temperature is maiirtained by the basic cooling device LCB -200G POLAR, feed of propylene glycol to water condenser of additional cooling device LCB
- 200D POLAR is controlled by water regulating valve (WRV), whereas the basic cooling device LCB - 200G POLAR includes a propylene glycol container and a soldered plate heat exchanger filled with necessary amount of freon from thermal regulating valve (TRV), and additional cooling device LCB - 200D POLAR includes a freon-type water condenser wherein a water regulating valve (WRV) maintains a stable condensation temperature, whereas connecting beer feed line is able of triple and more circulation of cooling liquid along the total length of beer feed line.
Novelty of the proposed solution lies in the fact that contrary to traditional keg beer cooling and dispensing lines the applied for line comprises an additional cooling device LCB -200D POLAR, forming a part of the general keg beer refrigeration and dispensing loop. Water condenser of additional cooling device is cooled with propylene glycol whose adequate temperature is maintained by the basic cooling device LCB - 200G POLAR, feed of propylene glycol to water condenser of additional cooling device LCB - 200D POLAR is controlled by water regulating valve (WRV), thus, one can not only reduce temperature at dispenser exit to a value in the range of -5 C to -0.5 C, but also support continuous beer dispensing at the rate up to 212 liters per hour within 15 minutes; water regulating valve (WRV) permits regulation of feed of cooling liquid (propylene glycol) to water condenser of additional cooling device LCB
- 200D POLAR to the amount depending of beer feed line length..
The solution is based on the task to improve a keg beer cooling and dispensing line coinprising a dispenser, connecting beer feed line in the form of a python hose, keg beer storage chamber, necessary and sufficient number of beer kegs, basic cooling device LCB -200G POLAR, so that in accordance with the utility invention the line additionally comprises a second cooling device LCB - 200D POLAR, forming a part of the general keg beer refrigeration and dispensing loop, water condenser of additional cooling device is cooled with propylene glycol whose adequate temperature is maiirtained by the basic cooling device LCB -200G POLAR, feed of propylene glycol to water condenser of additional cooling device LCB
- 200D POLAR is controlled by water regulating valve (WRV), whereas the basic cooling device LCB - 200G POLAR includes a propylene glycol container and a soldered plate heat exchanger filled with necessary amount of freon from thermal regulating valve (TRV), and additional cooling device LCB - 200D POLAR includes a freon-type water condenser wherein a water regulating valve (WRV) maintains a stable condensation temperature, whereas connecting beer feed line is able of triple and more circulation of cooling liquid along the total length of beer feed line.
Novelty of the proposed solution lies in the fact that contrary to traditional keg beer cooling and dispensing lines the applied for line comprises an additional cooling device LCB -200D POLAR, forming a part of the general keg beer refrigeration and dispensing loop. Water condenser of additional cooling device is cooled with propylene glycol whose adequate temperature is maintained by the basic cooling device LCB - 200G POLAR, feed of propylene glycol to water condenser of additional cooling device LCB - 200D POLAR is controlled by water regulating valve (WRV), thus, one can not only reduce temperature at dispenser exit to a value in the range of -5 C to -0.5 C, but also support continuous beer dispensing at the rate up to 212 liters per hour within 15 minutes; water regulating valve (WRV) permits regulation of feed of cooling liquid (propylene glycol) to water condenser of additional cooling device LCB
- 200D POLAR to the amount depending of beer feed line length..
5 Inventor step of the solution lies in the fact that the additional cooling device favors additional cooling of the basic cooling system loop and its elements, thus leading to attainment of established aim - to ensure temperature of beer at dispenser exit within the range -5 C to -0.5 C, depending on beer grade.
Keg beer cooling and dispensing line according to the utility invention permits beer cooling to temperature at dispenser exit witllin the range -5 C to -0.5 C, ensuring continuous beer dispensing at the rate up to 212 liters per hour within 15 minutes. This means that the line is able to dispense one keg of beer within 15 minutes, maintaining its temperature in vials within the range of -5 C to -0.5 C. The line is capable of 45 minutes continuous dispensing, after which it requires 5 minutes to resume continuous operation.
Brief Description of the Drawings In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a schematic illustration of a keg beer cooling and dispensing line according to the present invention installed in a bar, caf6, restaurant or other catering establishment.
Figure 2 is a schematic flow diagram of the keg beer cooling and dispensing line.
Figure 3 is an end elevational view of a basic cooling device (LCB - 200G
POLAR) of the keg beer cooling and dispensing line.
Figure 4 is a side elevational view of the basic cooling device (LCB - 200G
POLAR).
Figure 5 is an end elevational view of the basic cooling device (LCB - 200G
POLAR) opposite the end elevational view of Figure 3.
Figure 6 is a perspective view of the basic cooling device (LCB - 200G POLAR) with a cover thereof removed for illustration.
Figure 7 is an overliead plan view of the basic cooling device (LCB - 200G
POLAR).
Figure 8 is another perspective view of the basic cooling device (LCB - 200G
POLAR).
Detailed Description of Preferred Fmbodinments
Keg beer cooling and dispensing line according to the utility invention permits beer cooling to temperature at dispenser exit witllin the range -5 C to -0.5 C, ensuring continuous beer dispensing at the rate up to 212 liters per hour within 15 minutes. This means that the line is able to dispense one keg of beer within 15 minutes, maintaining its temperature in vials within the range of -5 C to -0.5 C. The line is capable of 45 minutes continuous dispensing, after which it requires 5 minutes to resume continuous operation.
Brief Description of the Drawings In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a schematic illustration of a keg beer cooling and dispensing line according to the present invention installed in a bar, caf6, restaurant or other catering establishment.
Figure 2 is a schematic flow diagram of the keg beer cooling and dispensing line.
Figure 3 is an end elevational view of a basic cooling device (LCB - 200G
POLAR) of the keg beer cooling and dispensing line.
Figure 4 is a side elevational view of the basic cooling device (LCB - 200G
POLAR).
Figure 5 is an end elevational view of the basic cooling device (LCB - 200G
POLAR) opposite the end elevational view of Figure 3.
Figure 6 is a perspective view of the basic cooling device (LCB - 200G POLAR) with a cover thereof removed for illustration.
Figure 7 is an overliead plan view of the basic cooling device (LCB - 200G
POLAR).
Figure 8 is another perspective view of the basic cooling device (LCB - 200G
POLAR).
Detailed Description of Preferred Fmbodinments
6 Let us discuss line operation in more detail. Beer cooling line has reached operational readiness. Maximum continuous load of 212 L/h beer is fed, being cooled cooling to temperature within the range -5 C to -0.5 C, for 15 minutes. This is working mode of the line.
For 15 minutes of intense operation the line cooled and dispensed a whole keg of beer. Then shutting dispenser tap and the line rehirns to initial position stops continuous dispensing. This is resuming mode lasting for 5 minutes. After resuming the line begins again continuous feed and cooling of product, thus restarting a new cooling cycle. Cooling cycle means a period when the line finishes its working and resuming modes. Beer fed to the line should be stored in kegs at a cooled premise or at a special refrigeration chamber wherein air temperature is maintained at the level 3.5 C. Precooling of beer in kegs to the temperature of 3.5 C takes place at this storage before feeding to the line. As a rule, such storage chambers exist at all beer restaurants, large bars, cafe, etc., as shown in Fig.l.
Fig. 2 shows the flow diagram of the proposed beer cooling line. As seen from the diagram, beer is fed to heat exchanger unit 3 along python hose and propylene glycol cooled at heat exchanger 9 is also fed therein, thus maintaining constant temperature of beer to be additionally cooled at heat exchange unit 3. The beer cooling line comprises two cooling devices, naniely LCB - 200G POLAR and LCB - 200D POLAR.
Keg beer cooling and dispensing line (Fig. 2) comprises such elements:
1-beer kegs; 2-pytlion; 3-- heat exchange unit of cooler LCB-200D POLAR, 4-dispenser;
5 - water condenser of cooler LCB-200D POLAR; 6- water regulating valve (WRV);
For 15 minutes of intense operation the line cooled and dispensed a whole keg of beer. Then shutting dispenser tap and the line rehirns to initial position stops continuous dispensing. This is resuming mode lasting for 5 minutes. After resuming the line begins again continuous feed and cooling of product, thus restarting a new cooling cycle. Cooling cycle means a period when the line finishes its working and resuming modes. Beer fed to the line should be stored in kegs at a cooled premise or at a special refrigeration chamber wherein air temperature is maintained at the level 3.5 C. Precooling of beer in kegs to the temperature of 3.5 C takes place at this storage before feeding to the line. As a rule, such storage chambers exist at all beer restaurants, large bars, cafe, etc., as shown in Fig.l.
Fig. 2 shows the flow diagram of the proposed beer cooling line. As seen from the diagram, beer is fed to heat exchanger unit 3 along python hose and propylene glycol cooled at heat exchanger 9 is also fed therein, thus maintaining constant temperature of beer to be additionally cooled at heat exchange unit 3. The beer cooling line comprises two cooling devices, naniely LCB - 200G POLAR and LCB - 200D POLAR.
Keg beer cooling and dispensing line (Fig. 2) comprises such elements:
1-beer kegs; 2-pytlion; 3-- heat exchange unit of cooler LCB-200D POLAR, 4-dispenser;
5 - water condenser of cooler LCB-200D POLAR; 6- water regulating valve (WRV);
7-propylene glycol pump; 8- propylene glycol vessel of cooler LCB-200G POLAR; 9-soldered plate heat exchanger of cooler LCB-200G POLAR; 10 - air condenser of cooler LCB-200G POLAR.
Cooler LCB-200G POLAR refrigerates propylene glycol in the following way.
Propylene glycol precooled at heat excllanger 9 due to pressure difference developed by pump 7 is fed to vessel 8. Then the same pump 7 pumps propylene glycol from vessel
Cooler LCB-200G POLAR refrigerates propylene glycol in the following way.
Propylene glycol precooled at heat excllanger 9 due to pressure difference developed by pump 7 is fed to vessel 8. Then the same pump 7 pumps propylene glycol from vessel
8 to pytllon hose 2. From python 2 propylene glycol passes through a tee to heat exchange unit 3 and from thence is recycled to be cooled at heat exchanger 9. Cooling at heat exchanger
9 is performed by refrigerating machine being a part of cooler LCB-200G POLAR.
Propylene glycol while cycling around the system serves several purposes.
First of all, it maintains the temperature of beer fed via python hose 2. Beer is fed from kegs I at temperature 4.5 C to reach python liose 2. To the same hose propylene glycol is fed as cooled at heat exchanger 9 to temperature -3 C. Accordingly, due to heat exchange between low temperature propylene glycol and warmer beer the temperature of beer is maintained throughout its passage through the python liose. Thus, beer temperature at the exit of python hose 2 will be equal or lower than at the entrance. If beer temperature at python entrance is 4.5 C, it should not exceed this value at the exit. This is attained by triple circulation of propylene glycol along the hose, i.e., propylene glycol passes within the python hose three times, which ensures that the beer would not be heated in the hose. To this end the python hose with total length of 40 m coinprises three 40-m propylene glycol lines connected in series, thus, the total propylene glycol path in the python hose makes 120 m.
Propylene glycol also cools water condenser 5 of refrigerating machine LCB-POLAR.
Stable cooling of water condenser depends not only of the temperature of propylene glycol but of its consumption as well. Lesser quantity of propylene glycol means insufficient cooling of the condenser, whereas propylene glycol overconsumption leads to its excessive cooling. Both options are unfavorable for cooler operation. Propylene glycol consumption depends primarily on python hose length. Larger length means smaller consumption, reduced length increases consumption. To ensure stable propylene glycol consumption through water condenser, a water-regulating valve is installed at the entrance of water condenser. The appearance of water regulating valve (WRV) is shown in Fig.2.
Cooler LCB - 200D POLAR serves for deep refrigeration of beer up to the temperature -5 C at heat exchange unit 3 before dispensing at dispenser 4. Cooler LCB -200D POLAR is a dry aluminum block-type apparatus. Beer from kegs I is fed at temperature 4.5 C to python hose 2. Then from python hose 2 beer at the same teinperature 4.5 C is fed to heat exchange unit 3 where it is additionally cooled to -5 C, and thence it is fed to dispenser 3 for dispensing into vials. Propylene glycol while passing through heat exchange unit 3 prevents its overfreezing at resuming mode when beer is not dispensed.
Water condenser permits to avoid dependence on ambient temperature. This element is cooled with water or aqueous solution of propylene glycol as in the proposed scheme. The temperature of propylene glycol fed to condenser is actually identical both in summer and in winter. Accordingly, condenser operation does not depend on ambient temperature, it is determined by the temperature of propylene glycol at condenser entrance, which in turn is maintained constant by a separate cooler LCB - 2000G POLAR. Thermal load on aluminum heat exchange unit remains actually unchanged, as beer throughput is constant under all operation modes of the line. Thus, the proposed solution enables a stable cooling cycle and, tlius, stable freezing capacity of cooler.
Stable cooling of water condenser depends not only on temperature of propylene glycol at condenser entrance, but on its flow rate as well. At lesser propylene glycol flow rate condenser cooling would be inadequate, whereas increased flow leads to overfreezing. Both extreme cases are unfavorable for cooler operation. Therefore, it the proposed solution propylene glycol flow rate depends mainly on optimal length of python hose.
With this length above optimal value the flow would reduce, a shorter length increases the flow rate. To ensure optimal flow rate of propylene glycol through water condenser water regulating valve (WRV) is installed at condenser entrance. Necessary propylene glycol flow rate may be established manually at water regulating valve and then nlaintained in automatic fashion.
In the proposed solution the length of python hose should be at least 40 m. This is an average or the most widely met distance between dispenser tap and beer keg storage chamber, established in experimental way. In case python hose length turns to exceed 40 m, such a change would necessitate correction of the set propylene glycol flow rate, which deteriorates operation of the entire line. Water regulating valve serves just for similar situations. With line installation finished it would be necessary to adjust water-regulating valve to the parameters specified in operation manual, and then this value would be maintained automatically.
The temperature of diy aluminunl unit as maintained by LCB - 200D POLAR cooler lies within the range -5 C to -1.5 C, thus ensuring reliable product cooling to temperatures below zero. While the temperature remains in this range, the cooler is in holding mode and its compressor does not activate. Water regulating valve 6 is completely closed, propylene glycol is fed to be cooled at heat exchanger 9 via lleat exchange unit 3. Then, with beer fed to cooling, the temperature of aluminum heat exchange unit 3 rises, and when it reaches -1.5 C
compressor is activated, thus reducing temperattire of the unit, water regulating valve 6 opens automatically and feed of propylene glycol to cool condenser 5 begins. Later on it is mixed with the main stream of propylene glycol to be cooled at heat exchanger 9.
As evident from the above, the proposed solution has distinct differences from the existing lines with propylene glycol as cooling medium. Traditional cooling lines do not comprise units for maintenance of stable product temperature below zero at maximum throughput of 212 L/hr. The length of python hose therein strictly limits the operation of propylene glycol coolers. The proposed keg beer cooling and dispensing line permits variation of length of python hose and, respectively, acljustment of the entire line issuing propylene glycol from conditions at a particular facility. The proposed propylene glycol circulation pump is selected in confonnity with final length of python hose depending on the distance between dispenser and beer keg storage chamber, irrespective of prescribed of fixed length of python hose as in traditional cooling lines.
Traditional propylene glycol coolers in beer cooling lines have a standard design:
propylene glycol aqueous soltition is poured into a bath and cooled by refrigerating machine, its evaporator being submerged into the tub filled witli propylene glycol.
LCB - 200G POLAR cooler (Figs.3-8) to cool propylene glycol in the proposed beer cooling line does not have such a tub. Propylene glycol is cooled in a soldered plate heat exchanger, unlike traditional designs. This is due to large freezing capacity of our supposed LCB - 200G POLAR cooler.
To ensure product cooling to teulperatures below zero (5 C to -1.5 C) the proposed LCB - 200G POLAR cooler has fi=eezing capacity 2,6 to 3 kW depending on operational mode. This is equivalent to thernial capacity of a long-term food storage chamber with volume 12...16 m3 at a small grocery or 10 high-class domestic refrigerators, 300 W
each. Therefore, in order to reach such a capacity we propose to apply a soldered plate heat exchanger as an evaporator of refrigerating machine. We suppose this type of heat exchanger to be the most efficient of all commercially available nowadays. The main advantage of such heat exchangers lies in excellent tliermal characteristics, higli thermal capacity and very efficient heat exchange design.
The heat exchanger is a set of plates made of stainless steel and connected with copper solder. Each plate has its own texture of cllannels where the media flow, their totality forming the heat exchange surface.
Such heat exchangers are not usual in traditional propylene glycol coolers of beer cooling lines that are too weak for such amounts of pumped product. Variation of python hose length leads to some change in propylene glycol consumption. Thus, thermal load varies on the evaporator of refrigerating machine LCB-200G POLAR, i.e., soldered heat exchanger. To cope with varying thermal load we must maintain the appropriate amount of freon fed to soldered heat exchanger to cool propylene glycol. To this end cooler LCB-200G
POLAR has a tliermal regulating valve. This valve seives for optimal filling of evaporator with Freon depending on its thermal load. In niost cases such coolers are equipped with permanent-section capillary pipes. But due to permanent section of the pipe the amount of Freon fed to the evaporator is also pernianent. In the thermal regulating valve the flow section varies in accordance with thermal load of evaporator, thus ensuring optimal filling of evaporator with Freon. Filling of evaporator witli freon is regulated by tliermal regulating valve in an automatic fashion. The valve may be adjusted manually, if necessary.
Besides, the proposed keg beer cooling and dispensing line is independent from fixed distances between bar stand and beer keg storage chanlber, thus permitting to suppress or minimize excessive heat flows around the bar stand; it may be adjusted for particular facility conditions and then operate in a fiilly automatic fashion.
Both coolers in beer cooling line may be automatically disconnected in case of emergency. To this end, the coolers are equipped with cartridge-type pressure regulators or high and low side pressure relays. If the feed of propylene glycol to water condenser of LCB -200D POLAR cooler (failure of propylene glycol pump or propylene glycol leak in the line) the cooler high side pressure relay would activate. Cooling of water condenser would stop without incoming propylene glycol, coiisequently, pressure would rise in pressure line of cooler refrigeration loop, and accordingly pressure relay disconnects the cooler. Pressure relay has a manual reset button, therefore, the cooler may not activate until the failure in propylene glycol loop is removed. Only when the line becomes operable again, manual reset button activates the cooler. In case prohylene glycol feed to refrigerating evaporator serving to cool propylene glycol at LCB - 200G POLAR is stopped, thermal load on the evaporator drastically reduces and the pressure in evaporator refrigerating loop begins failing. Then low side pressure relay would disconnect the cooler. It is equipped with a manual reset button as well as the high side pressure relay. Thus, oiily after the failure is removed cooler may be activated.
All emergency disconnections of coolers forniing beer-cooling line are performed in automatic mode. Miniinum time between failures is established as at least 5 000 hours for each cooler.
Mean time between failures is establisliecl as at least 10 000 hours for each cooler. Total minimum service life for each cooler is 10 years witli the proviso of adequate maintenance.
Average repair time is 3.5 hours for each cooler (if manufacture of new units is not necessary).
As evident from the description of the device it is new and may be widely used for equipment of cafes, bars and restaurants that dispense keg beer.
Propylene glycol while cycling around the system serves several purposes.
First of all, it maintains the temperature of beer fed via python hose 2. Beer is fed from kegs I at temperature 4.5 C to reach python liose 2. To the same hose propylene glycol is fed as cooled at heat exchanger 9 to temperature -3 C. Accordingly, due to heat exchange between low temperature propylene glycol and warmer beer the temperature of beer is maintained throughout its passage through the python liose. Thus, beer temperature at the exit of python hose 2 will be equal or lower than at the entrance. If beer temperature at python entrance is 4.5 C, it should not exceed this value at the exit. This is attained by triple circulation of propylene glycol along the hose, i.e., propylene glycol passes within the python hose three times, which ensures that the beer would not be heated in the hose. To this end the python hose with total length of 40 m coinprises three 40-m propylene glycol lines connected in series, thus, the total propylene glycol path in the python hose makes 120 m.
Propylene glycol also cools water condenser 5 of refrigerating machine LCB-POLAR.
Stable cooling of water condenser depends not only of the temperature of propylene glycol but of its consumption as well. Lesser quantity of propylene glycol means insufficient cooling of the condenser, whereas propylene glycol overconsumption leads to its excessive cooling. Both options are unfavorable for cooler operation. Propylene glycol consumption depends primarily on python hose length. Larger length means smaller consumption, reduced length increases consumption. To ensure stable propylene glycol consumption through water condenser, a water-regulating valve is installed at the entrance of water condenser. The appearance of water regulating valve (WRV) is shown in Fig.2.
Cooler LCB - 200D POLAR serves for deep refrigeration of beer up to the temperature -5 C at heat exchange unit 3 before dispensing at dispenser 4. Cooler LCB -200D POLAR is a dry aluminum block-type apparatus. Beer from kegs I is fed at temperature 4.5 C to python hose 2. Then from python hose 2 beer at the same teinperature 4.5 C is fed to heat exchange unit 3 where it is additionally cooled to -5 C, and thence it is fed to dispenser 3 for dispensing into vials. Propylene glycol while passing through heat exchange unit 3 prevents its overfreezing at resuming mode when beer is not dispensed.
Water condenser permits to avoid dependence on ambient temperature. This element is cooled with water or aqueous solution of propylene glycol as in the proposed scheme. The temperature of propylene glycol fed to condenser is actually identical both in summer and in winter. Accordingly, condenser operation does not depend on ambient temperature, it is determined by the temperature of propylene glycol at condenser entrance, which in turn is maintained constant by a separate cooler LCB - 2000G POLAR. Thermal load on aluminum heat exchange unit remains actually unchanged, as beer throughput is constant under all operation modes of the line. Thus, the proposed solution enables a stable cooling cycle and, tlius, stable freezing capacity of cooler.
Stable cooling of water condenser depends not only on temperature of propylene glycol at condenser entrance, but on its flow rate as well. At lesser propylene glycol flow rate condenser cooling would be inadequate, whereas increased flow leads to overfreezing. Both extreme cases are unfavorable for cooler operation. Therefore, it the proposed solution propylene glycol flow rate depends mainly on optimal length of python hose.
With this length above optimal value the flow would reduce, a shorter length increases the flow rate. To ensure optimal flow rate of propylene glycol through water condenser water regulating valve (WRV) is installed at condenser entrance. Necessary propylene glycol flow rate may be established manually at water regulating valve and then nlaintained in automatic fashion.
In the proposed solution the length of python hose should be at least 40 m. This is an average or the most widely met distance between dispenser tap and beer keg storage chamber, established in experimental way. In case python hose length turns to exceed 40 m, such a change would necessitate correction of the set propylene glycol flow rate, which deteriorates operation of the entire line. Water regulating valve serves just for similar situations. With line installation finished it would be necessary to adjust water-regulating valve to the parameters specified in operation manual, and then this value would be maintained automatically.
The temperature of diy aluminunl unit as maintained by LCB - 200D POLAR cooler lies within the range -5 C to -1.5 C, thus ensuring reliable product cooling to temperatures below zero. While the temperature remains in this range, the cooler is in holding mode and its compressor does not activate. Water regulating valve 6 is completely closed, propylene glycol is fed to be cooled at heat exchanger 9 via lleat exchange unit 3. Then, with beer fed to cooling, the temperature of aluminum heat exchange unit 3 rises, and when it reaches -1.5 C
compressor is activated, thus reducing temperattire of the unit, water regulating valve 6 opens automatically and feed of propylene glycol to cool condenser 5 begins. Later on it is mixed with the main stream of propylene glycol to be cooled at heat exchanger 9.
As evident from the above, the proposed solution has distinct differences from the existing lines with propylene glycol as cooling medium. Traditional cooling lines do not comprise units for maintenance of stable product temperature below zero at maximum throughput of 212 L/hr. The length of python hose therein strictly limits the operation of propylene glycol coolers. The proposed keg beer cooling and dispensing line permits variation of length of python hose and, respectively, acljustment of the entire line issuing propylene glycol from conditions at a particular facility. The proposed propylene glycol circulation pump is selected in confonnity with final length of python hose depending on the distance between dispenser and beer keg storage chamber, irrespective of prescribed of fixed length of python hose as in traditional cooling lines.
Traditional propylene glycol coolers in beer cooling lines have a standard design:
propylene glycol aqueous soltition is poured into a bath and cooled by refrigerating machine, its evaporator being submerged into the tub filled witli propylene glycol.
LCB - 200G POLAR cooler (Figs.3-8) to cool propylene glycol in the proposed beer cooling line does not have such a tub. Propylene glycol is cooled in a soldered plate heat exchanger, unlike traditional designs. This is due to large freezing capacity of our supposed LCB - 200G POLAR cooler.
To ensure product cooling to teulperatures below zero (5 C to -1.5 C) the proposed LCB - 200G POLAR cooler has fi=eezing capacity 2,6 to 3 kW depending on operational mode. This is equivalent to thernial capacity of a long-term food storage chamber with volume 12...16 m3 at a small grocery or 10 high-class domestic refrigerators, 300 W
each. Therefore, in order to reach such a capacity we propose to apply a soldered plate heat exchanger as an evaporator of refrigerating machine. We suppose this type of heat exchanger to be the most efficient of all commercially available nowadays. The main advantage of such heat exchangers lies in excellent tliermal characteristics, higli thermal capacity and very efficient heat exchange design.
The heat exchanger is a set of plates made of stainless steel and connected with copper solder. Each plate has its own texture of cllannels where the media flow, their totality forming the heat exchange surface.
Such heat exchangers are not usual in traditional propylene glycol coolers of beer cooling lines that are too weak for such amounts of pumped product. Variation of python hose length leads to some change in propylene glycol consumption. Thus, thermal load varies on the evaporator of refrigerating machine LCB-200G POLAR, i.e., soldered heat exchanger. To cope with varying thermal load we must maintain the appropriate amount of freon fed to soldered heat exchanger to cool propylene glycol. To this end cooler LCB-200G
POLAR has a tliermal regulating valve. This valve seives for optimal filling of evaporator with Freon depending on its thermal load. In niost cases such coolers are equipped with permanent-section capillary pipes. But due to permanent section of the pipe the amount of Freon fed to the evaporator is also pernianent. In the thermal regulating valve the flow section varies in accordance with thermal load of evaporator, thus ensuring optimal filling of evaporator with Freon. Filling of evaporator witli freon is regulated by tliermal regulating valve in an automatic fashion. The valve may be adjusted manually, if necessary.
Besides, the proposed keg beer cooling and dispensing line is independent from fixed distances between bar stand and beer keg storage chanlber, thus permitting to suppress or minimize excessive heat flows around the bar stand; it may be adjusted for particular facility conditions and then operate in a fiilly automatic fashion.
Both coolers in beer cooling line may be automatically disconnected in case of emergency. To this end, the coolers are equipped with cartridge-type pressure regulators or high and low side pressure relays. If the feed of propylene glycol to water condenser of LCB -200D POLAR cooler (failure of propylene glycol pump or propylene glycol leak in the line) the cooler high side pressure relay would activate. Cooling of water condenser would stop without incoming propylene glycol, coiisequently, pressure would rise in pressure line of cooler refrigeration loop, and accordingly pressure relay disconnects the cooler. Pressure relay has a manual reset button, therefore, the cooler may not activate until the failure in propylene glycol loop is removed. Only when the line becomes operable again, manual reset button activates the cooler. In case prohylene glycol feed to refrigerating evaporator serving to cool propylene glycol at LCB - 200G POLAR is stopped, thermal load on the evaporator drastically reduces and the pressure in evaporator refrigerating loop begins failing. Then low side pressure relay would disconnect the cooler. It is equipped with a manual reset button as well as the high side pressure relay. Thus, oiily after the failure is removed cooler may be activated.
All emergency disconnections of coolers forniing beer-cooling line are performed in automatic mode. Miniinum time between failures is established as at least 5 000 hours for each cooler.
Mean time between failures is establisliecl as at least 10 000 hours for each cooler. Total minimum service life for each cooler is 10 years witli the proviso of adequate maintenance.
Average repair time is 3.5 hours for each cooler (if manufacture of new units is not necessary).
As evident from the description of the device it is new and may be widely used for equipment of cafes, bars and restaurants that dispense keg beer.
Claims (5)
1. Keg beer cooling and dispensing line comprising a dispenser, a connecting beer feed line in the form of a python hose, a beer keg storage chamber, necessary and sufficient number of beer kegs, a basic cooling device (LCB-200G POLAR), a liquid coolant pump, characterized in that it additionally comprises an auxiliary cooling device (LCB-200D
POLAR) within the entire keg beer cooling and dispensing loop so that water condenser of the additional cooling device is cooled with propylene glycol whose necessary temperature is maintained by the basic cooling device, whereas propylene glycol feed to water condenser of the additional cooling device is controlled by water regulating valve (WRV).
POLAR) within the entire keg beer cooling and dispensing loop so that water condenser of the additional cooling device is cooled with propylene glycol whose necessary temperature is maintained by the basic cooling device, whereas propylene glycol feed to water condenser of the additional cooling device is controlled by water regulating valve (WRV).
2. Line as per Claim 1 characterized in that basic cooling device comprises a propylene glycol container.
3. Line as per Claim 1 characterized in that basic cooling device comprises a soldered plate heat exchanger filled with necessary amount of freon by thermal regulating valve (TRV).
4. Line as per Claim 1 characterized in that additional cooling device comprises a freon-filled water-cooled condenser wherein a water-regulating valve (WRV) maintains constant condensation temperature.
5. Line as per Claim 1 characterized in that connecting beer feed line may maintain triple and more circulation of liquid coolant along the entire length of beer feed line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2637861 CA2637861A1 (en) | 2008-07-09 | 2008-07-09 | Keg beer cooling and dispensing line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2637861 CA2637861A1 (en) | 2008-07-09 | 2008-07-09 | Keg beer cooling and dispensing line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2637861A1 true CA2637861A1 (en) | 2010-01-09 |
Family
ID=41508478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2637861 Abandoned CA2637861A1 (en) | 2008-07-09 | 2008-07-09 | Keg beer cooling and dispensing line |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2637861A1 (en) |
-
2008
- 2008-07-09 CA CA 2637861 patent/CA2637861A1/en not_active Abandoned
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