US3786648A - Cooling system with multiple evaporators - Google Patents
Cooling system with multiple evaporators Download PDFInfo
- Publication number
- US3786648A US3786648A US00338095A US3786648DA US3786648A US 3786648 A US3786648 A US 3786648A US 00338095 A US00338095 A US 00338095A US 3786648D A US3786648D A US 3786648DA US 3786648 A US3786648 A US 3786648A
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- Prior art keywords
- switch
- compressor
- valves
- coil
- switches
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- 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.)
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Classifications
-
- 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
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
- F25D23/126—Water cooler
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2511—Evaporator distribution valves
-
- 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
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/06—Refrigerators with a vertical mullion
Definitions
- This invention relates to an improved multiple evaporator cooling system. More particularly, it relates to an improved refrigerator-water cooler having a pair of evaporators, a compressor and a control circuit where the pressure on the opposite'sides of the compressor are nearly equal before the starting of the compressor and the evaporators operate independently of one another.
- Refrigeration systems have been provided utilizing a single condenser to operate a pair of evaporators.
- Another system utilizing two evaporators is a single cabinet having refrigerator chamber and water cooler chamber whereby the water-cooler chamber is cooled by a first evaporator and the refrigerator chamber by a second evaporator.
- Each chamber utilizes its own thermostat which respond independently to different temperatures.
- the thermostats are respectively connected to a pair .of valve coils. These valve coils operate a pair of valves which connect each evaporator to the condenser which is in the refrigerator system and the water cooler system.
- refrigerant fluid When a valve is opened refrigerant fluid is allowed to flow from the condenser to the evaporator.
- a pressure switch which is connected to the evaporator side of the compressor and is responsive to a predetermined pressure from the evaporators. The pressure switch is closed thereby turning on the compressor when this pressure builds to the predetermined valve. This pressure build-upis caused when. the formerly closed valves are opened thereby allowing fluid to flow into the evaporators.
- a capillary tube connected between each refrigerant valve and each evaporator. Each capillary tube is a very thin tube which regulates the amount of fluid flowing'into the evaporators.
- Another object is to provide a multiple evaporator cooling system having a single compressor which comes on and off independently of the pressure.
- Another object is to provide a multiple evaporator cooling system having multiple valves for controlling fluid in the system, the valves being opened by an electrical control circuit while the compressor is off.
- a refrigerator-water cooler including an enclosure divided into a refrigerator compartment and a water cooler compartment.
- a first evaporator is included in the refrigerator compartment and a second evaporator is included in a water cooler compartment.
- a compressor is connected on one side of the first and second evaporators.
- a pair of valves are connected between the evaporators and condenser for controlling fluid flow therebetween.
- a control circuit is further provided for operating the compressor and for opening and closing the valves.
- dual evaporator systems which use two compressors but they really have separate systems.
- Other dual evaporator systems are of a type which supply fluid to either one evaporator or another but not both at the same time.
- One side dominates over control circuit includes a means for keeping the valves open at all times while the compressor is not running thus equalizing the pressure across the compressor whereby the compressor will start against substantially zero pressure load.
- 1 is a diagram of the front perspective view of a refrigerator-water cooler enclosure showing parts of the cooling system and the control circuit.
- FIG. 2 is a diagram of the rear perspective view of the refrigerator'water cooler showing parts of the cooling system and the control circuit.
- FIG. 3 is a schematic diagram of the cooling system and the control circuit used in FIGS. 1 and 2.
- Chamber 1 is a refrigerator chamber having a refrigerator evaporator 3 attached to ice tray container 17.
- the water cooler compartment 2 includes cold water chamber 11 with water cooler evaporator 10 connected around it.
- the cold water chamber is supplied with water from reservoir 12 which is connected to the refrigerator box at opening 13. Cold water is released from water tap 16.
- the cooling system may be-better understood by referring to FIG. 2 which shows the backside of the refrigerator-water cooler with the sides and top removed.
- Refrigerator evaporator 3 is connected on one side to compressor 6 and on the other side to capillary tube 4.
- Capillary tube 4 is relatively narrow in diameter.
- Capillary tube 4 is further connected to electromechanical valve 5. This valve controls the flow of refrigerant fluid to evaporator 3.
- Cold water evaporator 10 is connected to compressor 6 together with refrigerator evaporator 3 through tube 19.
- the other side of water cooler evaporator 10 is connected to capillary tube 9.
- Capillary tube 9 is also narrow in diameter and is further connected to electro-mechanical valve 8. This valve controls the flow of fluid from the mechanical condenser 7 to refrigerator evaporator 10.
- Control circuit 14, shown in block form, is used to control the current through valve coils 29 and 31 and further to control the starting and stopping of compressor 6.
- Valve coils 29 and 31 are used to control the opening and closing of valves 5 and 8
- FIG. 3 shows a detailed schematic circuit diagram of control circuit 14 together with a schematic diagram of the cooling system.
- An operating potential is connected across input terminals 24 and 25.
- Compressor 6 is connected to the input terminal 24 through thermostat switches 34 and 35.
- the opening and closing of thermostats switches 34 and 35 are controlled by thermostats 32 and 33 respectively.
- a thermostat and a switch may be one unit or may be separated.
- Switch 34 will close when the temperature sensed by thermostat 32 reaches a predetermined value.
- Switch 35 will close when the temperature sensed by thermostat 33 reaches another predetermined value.
- Thermostat 32 is located in the water cooler chamber 2 and thermostat 33 is located in refrigerator container 1. When either switch 34 or 35 or both switches are closed this completes the compressor circuit and the compressor comes on.
- Switch 34 is electrically connected to the series branch including switch 38 and relay coil 39.
- Relay coil 39 is further connected to input 25.
- Switches 34 and 35 are respectively mechanically gauged to switches 38 and 36 in such a manner that when switch 34 is open switch 38 is closed and when switch 35 is open switch 36 is closed and vice-versa.
- Switches 34 and 38 are complimentary and switches 35 and 36 are complimentary.
- Switch 35 is electrically connected to switch 36 and to one side of relay coil 37. The other side of relay coil 37 is further connected to input terminal 25.
- Relay coil 37 is magnetically coupled to relay switch 28 so that when current flows through coil 37 switch 28 is open.
- Relay coil 39 is magnetically coupled to relay switch 30 to form a relay. When current flows through coil 39, switch 30 is open.
- Relay switch 30 is connected in series to valve coil 31 and this is connected across input terminals 24 and 25.
- Valve coil 31 is magnetically connected to water cooler valve 8 such that valve 8 is open when current flows through valve coil 31.
- Switch 30 is normally closed, that is, while the compressor is not running current flows through valve coil 31 causing valve 8 to remain open. Since valve 8 tends to remain open pressure will tend to equalize on either side of the compressor while it is not running.
- Relay switch 28 is connected to valve coil 29. This series relationship is also connected across input voltage terminals 24 and 25.
- Valve coil 29 is magnetically coupled to valve 5 to control the valve.
- FIG. 3 shows the valves and valve coils separated but they may be parts of one unit as shown in FIG. 2. Current also flows through valve coil 29 while the compressor is not running and thus valve 5 is also normally open while the compressor is not running further equalizing pressure across the compressor. Furthermore, since pressure switch is not used to start the compressor, there is no time delay for pressure buildup through capillary tubes 4 and 9 in order to close a pressure switch.
- thermostat 32 When the temperature near thermostat 32 is high enough such that it activates switch 34 a current flows from terminal 24 through switch 34 and compressor 6 back to input terminal 25. This energizes the compressor motor with no time delay for fluid to flow through capillary tube 10. That is, as soon as thermostat 32 indicates that more cooling is needed the compressor begins to run. In the past, there was a pressure switch between input terminal 24 and compressor 6 and in that case the compressor would only come on when there was sufficient pressure on the evaporator side of the compressor to cause the pressure switch to close. The need for the pressure switch has been eliminated in this circuit.
- thermostat 32 closes switch 34, it also opens mechanically gauged switch 38.
- switch 36 remains closed and current flows from input terminal 24 through switch 34, through switch 36, and relay coil 37 back to input terminal 25.
- Relay coil 37 is electromagnetically coupled to the relay switch 28.
- This current causes relay switch 28 to open thus stopping current flow through refrigerator valve coil 29 and further causes the refrigerator valve 5 to close.
- current continues to flow through switch 30 and water cooler valve coil 31 allowing water cooler valve 8 to continue to be open.
- the compressor forces fluid from the condenser 7 through valve 8, through capillary tube 9, and into the water cooler evaporator 10. This causes the temperature in water cooler evaporator 10 to lower and when it is sufflciently low, thermostat 32 will reopen switch 34 and stop the compressor.
- switch 34 reopens this stops current flow through switch 36 and relay coil 37 which allows relay switch 28 to close.
- Current again flows through valve coil 29 allowing refrigerator valve 5 to again open, which allows the pressure again to equalize across the compressor 6.
- Switches 36 and 38 are open while 28 and 30 are closed allowing current to flow through valve coils 29 and 31. This keeps valves 5 and 8 open allowing refrigerant material to flow into both refrigerator evaporator 3 and water cooler evaporator 10. Thus, it is possible for both the water cooler chamber and the refrigerator chamber to receive a coolant fluid without one system dominating over the other one.
- a refrigeration system and a control circuit comprising: input means for connecting the circuit to a source of operating potential; first and second thermostats; a first switch responsive to said first thermostat connected to said input means; a second switch responsive to said second thermostat connected to said input means; a compressor connected to said first and second switches, said compressor being energized upon the closing of any of said first and second switches; a third switch connected to a first relay coil; a fourth switch connected to a second relay coil; said third and fourth switches being electrically connected to said first and second switches, said third switch being mechanically ganged to said first switch so that when said first switch is open said third switch is closed and visa versa, said fourth switch being mechanically ganged to said second switch so that when said second switch is open said fourth switch is closed and visa versa; a first relay switch connected to a first valve coil and to said input means, said first relay switch being coupled to said first relay coil, said first relay switch being opened upon energization of said first relay coil; a second relay switch connected to a second valve coil
- a refrigerator-water cooler comprising: an enclosure divided into a refrigerator compartment and a water cooler compartment; a cooling system adapted to receive a coolant including: a first evaporator included in said refrigerator compartment, a second evaporator included in said water cooler compartment, 3 compressor connected to one side of said first and second evaporators, first and second valves connected respectively to the other sides of said first and second evaporators, said first and second valves being open at least while said compressor is off, a condenser connected between said compressor and said valves; a control circuit for controlling the operation of said compressor and the operation of said first and second valves including a first coil magnetically coupled to said first valve for controlling said first valve, a first relay switch connected to said first coil for controlling the current through said first coil, a second coil magnetically coupled to said second valve for controlling said second valve, a second relay switch connected to said second coil for controlling the current through said second coil, whereby the coolant pressure on both sides of said compressor is approximately equal while said compressor is off.
- a cooling system and control circuit comprising: first and second enclosed compartments; first and second evaporators respectively included in said first and second compartments for absorbing heat; first and second thermostats respectively included in said first and second compartments for sensing temperature; input means for connecting the control circuit to a source of operating potential; first and second switches connected to said input means and controlled respectively by said first and second thermostats; a compressor connected to said first and second switches; said compressor connected to a cooling system including said first and second evaporators, first and second valves respectively connected to said first and second evaporators for controlling cooling fluid flow; means for opening and closing said first and second valves in response to said first and second thermostats whereby said valves remain open at least while said compressor is off.
Abstract
Description
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US33809573A | 1973-03-05 | 1973-03-05 |
Publications (1)
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US3786648A true US3786648A (en) | 1974-01-22 |
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US00338095A Expired - Lifetime US3786648A (en) | 1973-03-05 | 1973-03-05 | Cooling system with multiple evaporators |
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Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2333209A1 (en) * | 1975-11-28 | 1977-06-24 | Danfoss As | COMPRESSION COOLING SYSTEM |
EP0017840A2 (en) * | 1979-04-20 | 1980-10-29 | Licentia Patent-Verwaltungs-GmbH | Heating and cooling apparatus |
DE3024590A1 (en) * | 1980-06-28 | 1982-01-28 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Combined refrigerator-freezer with drink cooler - has additional carboniser and preselector controlled mixer with drink concentrate |
EP0061104A2 (en) * | 1981-03-24 | 1982-09-29 | INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA S.p.A. | Device for the adjustment of the refrigerating fluid flow in a apparatus for the production of cold or hot conditions and system for regulating such fluid flow |
US4373353A (en) * | 1977-08-17 | 1983-02-15 | Fedders Corporation | Refrigerant control |
US4685306A (en) * | 1986-10-06 | 1987-08-11 | Westinghouse Electric Corp. | Compartmentalized transport refrigeration system |
US4712383A (en) * | 1986-10-06 | 1987-12-15 | Thermo King Corporation | Compartmentalized transport refrigeration system |
EP0066553B1 (en) * | 1981-05-15 | 1989-05-31 | INDESIT S.r.l. | Control system for improving the efficiency of cooling or heating appliances |
EP0428712A1 (en) * | 1989-06-15 | 1991-05-29 | Coca Cola Co | Carbonator refrigeration system. |
US5228308A (en) * | 1990-11-09 | 1993-07-20 | General Electric Company | Refrigeration system and refrigerant flow control apparatus therefor |
EP0583905A1 (en) | 1992-08-14 | 1994-02-23 | Whirlpool Corporation | Dual evaporator refrigerator with sequential compressor operation |
US5406805A (en) * | 1993-11-12 | 1995-04-18 | University Of Maryland | Tandem refrigeration system |
US5471849A (en) * | 1994-11-18 | 1995-12-05 | General Electric Company | Independent compartment temperature control in a household refrigerator using fan interlock |
US5487277A (en) * | 1994-11-18 | 1996-01-30 | General Electric Company | Independent compartment temperature control in a household refrigerator using interlinked thermostats |
GB2390419A (en) * | 2002-07-04 | 2004-01-07 | Lg Electronics Inc | Controlling the operation of cooling systems provided with two evaporators |
US20040187510A1 (en) * | 2003-03-29 | 2004-09-30 | Samsung Electronics Co., Ltd. | Refrigerator |
US20040226313A1 (en) * | 2003-05-13 | 2004-11-18 | Busick Louis M. | Combined water cooler and refrigerator unit |
US7150163B1 (en) * | 2004-12-13 | 2006-12-19 | Mcallister Andrea H | Water cooler enclosure |
US20090260371A1 (en) * | 2008-04-18 | 2009-10-22 | Whirlpool Corporation | Secondary cooling apparatus and method for a refrigerator |
US20100037650A1 (en) * | 2006-11-09 | 2010-02-18 | Lg Electronics Inc. | Apparatus for refrigeration cycle and refrigerator |
US20100100243A1 (en) * | 2006-12-26 | 2010-04-22 | Moo Yeon Lee | Refrigerator and control method for the same |
EP2690377A1 (en) * | 2012-07-24 | 2014-01-29 | Whirlpool Corporation | Cold beverage dispenser |
US10753663B2 (en) * | 2018-01-25 | 2020-08-25 | Johnson Controls Technology Company | HVAC system with multiple compressors and heat exchangers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1523112A (en) * | 1924-05-31 | 1925-01-13 | Frank Kanter | Refrigerating apparatus |
US1735498A (en) * | 1926-12-20 | 1929-11-12 | Joseph M Etienne | Refrigerating apparatus |
US2123497A (en) * | 1936-11-11 | 1938-07-12 | Westinghouse Electric & Mfg Co | Two-temperature refrigerating apparatus |
US2215327A (en) * | 1937-12-09 | 1940-09-17 | Gen Electric | Air conditioning system |
US2328472A (en) * | 1942-01-19 | 1943-08-31 | Vapor Car Heating Co Inc | Split evaporator for cooling systems |
-
1973
- 1973-03-05 US US00338095A patent/US3786648A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1523112A (en) * | 1924-05-31 | 1925-01-13 | Frank Kanter | Refrigerating apparatus |
US1735498A (en) * | 1926-12-20 | 1929-11-12 | Joseph M Etienne | Refrigerating apparatus |
US2123497A (en) * | 1936-11-11 | 1938-07-12 | Westinghouse Electric & Mfg Co | Two-temperature refrigerating apparatus |
US2215327A (en) * | 1937-12-09 | 1940-09-17 | Gen Electric | Air conditioning system |
US2328472A (en) * | 1942-01-19 | 1943-08-31 | Vapor Car Heating Co Inc | Split evaporator for cooling systems |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2333209A1 (en) * | 1975-11-28 | 1977-06-24 | Danfoss As | COMPRESSION COOLING SYSTEM |
US4373353A (en) * | 1977-08-17 | 1983-02-15 | Fedders Corporation | Refrigerant control |
EP0017840A2 (en) * | 1979-04-20 | 1980-10-29 | Licentia Patent-Verwaltungs-GmbH | Heating and cooling apparatus |
EP0017840A3 (en) * | 1979-04-20 | 1981-01-28 | Licentia Patent-Verwaltungs-GmbH | Heating and cooling apparatus |
DE3024590A1 (en) * | 1980-06-28 | 1982-01-28 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Combined refrigerator-freezer with drink cooler - has additional carboniser and preselector controlled mixer with drink concentrate |
EP0061104A2 (en) * | 1981-03-24 | 1982-09-29 | INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA S.p.A. | Device for the adjustment of the refrigerating fluid flow in a apparatus for the production of cold or hot conditions and system for regulating such fluid flow |
EP0061104A3 (en) * | 1981-03-24 | 1982-11-24 | Indesit Industria Elettrodomestici Italiana S.P.A. | Device for the adjustment of the refrigerating fluid flow in a apparatus for the production of cold or hot conditions and system for regulating such fluid flow |
EP0066553B1 (en) * | 1981-05-15 | 1989-05-31 | INDESIT S.r.l. | Control system for improving the efficiency of cooling or heating appliances |
US4712383A (en) * | 1986-10-06 | 1987-12-15 | Thermo King Corporation | Compartmentalized transport refrigeration system |
US4685306A (en) * | 1986-10-06 | 1987-08-11 | Westinghouse Electric Corp. | Compartmentalized transport refrigeration system |
EP0428712A1 (en) * | 1989-06-15 | 1991-05-29 | Coca Cola Co | Carbonator refrigeration system. |
EP0428712A4 (en) * | 1989-06-15 | 1992-04-29 | The Coca-Cola Company | Carbonator refrigeration system |
US5228308A (en) * | 1990-11-09 | 1993-07-20 | General Electric Company | Refrigeration system and refrigerant flow control apparatus therefor |
EP0583905A1 (en) | 1992-08-14 | 1994-02-23 | Whirlpool Corporation | Dual evaporator refrigerator with sequential compressor operation |
US5465591A (en) * | 1992-08-14 | 1995-11-14 | Whirlpool Corporation | Dual evaporator refrigerator with non-simultaneous evaporator |
US5406805A (en) * | 1993-11-12 | 1995-04-18 | University Of Maryland | Tandem refrigeration system |
US5471849A (en) * | 1994-11-18 | 1995-12-05 | General Electric Company | Independent compartment temperature control in a household refrigerator using fan interlock |
US5487277A (en) * | 1994-11-18 | 1996-01-30 | General Electric Company | Independent compartment temperature control in a household refrigerator using interlinked thermostats |
GB2390419A (en) * | 2002-07-04 | 2004-01-07 | Lg Electronics Inc | Controlling the operation of cooling systems provided with two evaporators |
GB2390419B (en) * | 2002-07-04 | 2006-03-01 | Lg Electronics Inc | Controlling the Operation of Cooling Systems Provided With Two Evaporators |
US20040187510A1 (en) * | 2003-03-29 | 2004-09-30 | Samsung Electronics Co., Ltd. | Refrigerator |
US7231782B2 (en) * | 2003-03-29 | 2007-06-19 | Samsung Electronics Co., Ltd. | Refrigerator |
US20040226313A1 (en) * | 2003-05-13 | 2004-11-18 | Busick Louis M. | Combined water cooler and refrigerator unit |
US6912867B2 (en) * | 2003-05-13 | 2005-07-05 | Oasis Corporation | Combined water cooler and refrigerator unit |
US7150163B1 (en) * | 2004-12-13 | 2006-12-19 | Mcallister Andrea H | Water cooler enclosure |
US8769975B2 (en) * | 2006-11-09 | 2014-07-08 | Lg Electronics Inc. | Apparatus for refrigeration cycle and refrigerator |
US20100037650A1 (en) * | 2006-11-09 | 2010-02-18 | Lg Electronics Inc. | Apparatus for refrigeration cycle and refrigerator |
US20100100243A1 (en) * | 2006-12-26 | 2010-04-22 | Moo Yeon Lee | Refrigerator and control method for the same |
US8447432B2 (en) | 2006-12-26 | 2013-05-21 | Lg Electronics Inc. | Refrigerator and control method for the same |
US20090260371A1 (en) * | 2008-04-18 | 2009-10-22 | Whirlpool Corporation | Secondary cooling apparatus and method for a refrigerator |
US8794026B2 (en) | 2008-04-18 | 2014-08-05 | Whirlpool Corporation | Secondary cooling apparatus and method for a refrigerator |
EP2690377A1 (en) * | 2012-07-24 | 2014-01-29 | Whirlpool Corporation | Cold beverage dispenser |
US10753663B2 (en) * | 2018-01-25 | 2020-08-25 | Johnson Controls Technology Company | HVAC system with multiple compressors and heat exchangers |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HOBART CHICAGO HEIGHTS, INC. AN OH CORP Free format text: CHANGE OF NAME;ASSIGNOR:FSE CORP., AN OH CORP;REEL/FRAME:004021/0506 Effective date: 19810528 Owner name: FSE CORP., WORLD HEADQUARTERS, TROY, OH A CORP. OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GENERAL ELECTRIC COMPANY;REEL/FRAME:004021/0501 Effective date: 19800429 |
|
AS | Assignment |
Owner name: HOBART CORPORATION WORLD HEADQUARTERS A DE CORP,OH Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HOBART CHICAGO HEIGHTS, INC. AN OH CORP;REEL/FRAME:004416/0939 Effective date: 19850606 Owner name: HOBART CORPORATION WORLD HEADQUARTERS TROY, OH 45 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE JULY 29, 1981.;ASSIGNOR:HOBART CHICAGO HEIGHTS, INC. AN OH CORP;REEL/FRAME:004416/0939 Effective date: 19850606 |