EP1616136A1 - Refrigeration system and a method for operating such system - Google Patents
Refrigeration system and a method for operating such systemInfo
- Publication number
- EP1616136A1 EP1616136A1 EP04726356A EP04726356A EP1616136A1 EP 1616136 A1 EP1616136 A1 EP 1616136A1 EP 04726356 A EP04726356 A EP 04726356A EP 04726356 A EP04726356 A EP 04726356A EP 1616136 A1 EP1616136 A1 EP 1616136A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- outlet
- condenser
- refrigeration system
- refrigerant
- 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.)
- Granted
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 4
- 239000003507 refrigerant Substances 0.000 claims abstract description 16
- 230000008020 evaporation Effects 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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
- 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
-
- 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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/044—Condensers with an integrated receiver
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/16—Receivers
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/01—Geometry problems, e.g. for reducing size
-
- 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
- F25B2600/2503—Condenser exit 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
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
-
- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
Definitions
- Refrigeration system and a method for operating such system
- This invention relates to a refrigeration system comprising one compressor that via a closed circuit containing a circulating refrigerant is connected to a condenser and two or more evaporators.
- the invention also relates to a method for operating such a system.
- Refrigerator systems of the type mentioned above are previously known and are used for instance in refrigerators/freezers.
- two or more evaporators in these kinds of systems, there will be problems to achieve maximum energy efficiency for the system if each evaporator is working under different temperature level and/or heat load. If the evaporators are serial or parallel connected, without other devices, the lowest temperature (together with highest) in the system will determine the system coefficient of performance (COP)and therefore the energy consumption.
- COP system coefficient of performance
- Fig 1. is a schematic view of a first embodiment of the invention whereas Fig. 2 is a schematic view of a second embodiment.
- a compressor 10 that is connected to a suction pipe 11 and a pressure pipe 12 of a closed circuit containing a refrigerant.
- the pressure pipe 12 that contains the refrigerant in a gaseous state under high pressure is connected to an inlet side 13 of a condenser 14 in which the gas gradually condenses to its liquid state.
- the outlet side 15 of the condenser is connected to an inlet branch 16 of a T-piece 17 having a vertical branch 18 ending in a container 19 in which a certain volume of the condensate can be temporarily hidden.
- a pipe 20 that is connected to an inlet side of a first, high load evaporator 21 via a valve 22 and a first expansion device 23.
- An outlet pipe 24 of the first evaporator 21 is via a check valve 25 connected to the suction pipe 11 in which the refrigerant exists in vapor state at low pressure.
- An outlet branch 26 of the T-piece 17 is via a pipe 27 connected to a second, small load evaporator 28 by means of a second valve 29 and a second expansion device 30.
- An outlet pipe 31 of the second evaporator 28 is also connected to the suction pipe 11.
- the first evaporator 21 is a high load evaporator with a low pressure whereas the second evaporator 28 is a small load evaporator under high pressure.
- the system operates in the following manner. From the suction pipe 11 at the low- pressure side of the compressor 10 the vapor is compressed to a high pressure and distributed to the pressure pipe 12 by means of the compressor 10. The gas enters into the condenser 14 from the inlet side 13 and is cooled such that it gradually condenses to a warm condensate. The warm condensate flows from the outlet side 15 of the condenser into the inlet branch 16 of the T-piece 17 and further through the vertical branch 18 from which it by gravity flows into the container 19. Provided that the valve 22 is open the refrigerant enters the first, high load evaporator 21 via the expansion device 23 under a considerably lower pressure. The low pressure condensate now takes up heat from the cooling space in which the evaporator is placed and simultaneously it boils. The vapor that is created has a low pressure and flows through the check valve 25 into the suction pipe 11.
- valve 22 If on the other hand the valve 22 is closed the warm condensate will be collected and temporarily hidden and trapped in the container 19 until the container is filled. Then the remaining amount of refrigerant in the system will, provided that the valve 29 is open, instead flow through the outlet branch 26 of the T-piece, the pipe 27, the expansion device 30 and the second, small load evaporator 28 to the suction pipe 11 thereby cooling the space in which the second evaporator is placed.
- the scope of the invention is the level relation in positioning between the first outlet of the container (19) connecting it with the first valve (22,22a) and the second outlet of the container connecting it with the second valve (29,29a).
- the relation in level will define the volume of warm condensate that will be collected and temporarily hidden and trapped in the container when the first valve is closed. This means that as long as the second outlet is positioned above the first outlet (or the other way around) a volume will be defined in which the condensate is collected.
- the word "above” means that the outlets do not need to be positioned straight above each other. They can instead be displaced in relation to each other.
- valves 22 and 29, the compressor 10 and conventional temperature sensors are connected and controlled by means of an electrical control circuit that is designed in a suitable way.
- the hidden volume is instead an integrated part of the condenser 14a.
- the hidden volume is created by the lower part 19a of the condenser 14a.
- the condensate collects at the lower part of the condenser until it reaches the outlet 26a which is connected to the pipe 27a via the valve 29a.
- the valve 29a is open the remaining refrigerant in the system is then circulated solely through the upper part of the condenser 14a.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Details Of Measuring And Other Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0301139A SE0301139D0 (en) | 2003-04-15 | 2003-04-15 | Refrigeration system and a method for operating such system |
PCT/SE2004/000547 WO2004092661A1 (en) | 2003-04-15 | 2004-04-07 | Refrigeration system and a method for operating such system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1616136A1 true EP1616136A1 (en) | 2006-01-18 |
EP1616136B1 EP1616136B1 (en) | 2007-09-05 |
Family
ID=20291059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04726356A Expired - Lifetime EP1616136B1 (en) | 2003-04-15 | 2004-04-07 | Refrigeration system and a method for operating such system |
Country Status (10)
Country | Link |
---|---|
US (1) | US20060130515A1 (en) |
EP (1) | EP1616136B1 (en) |
JP (1) | JP2006523819A (en) |
CN (1) | CN1777780A (en) |
AT (1) | ATE372490T1 (en) |
AU (1) | AU2004230744A1 (en) |
DE (1) | DE602004008761T2 (en) |
NZ (1) | NZ542807A (en) |
SE (1) | SE0301139D0 (en) |
WO (1) | WO2004092661A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7681406B2 (en) | 2006-01-13 | 2010-03-23 | Electrolux Home Products, Inc. | Ice-making system for refrigeration appliance |
US8408016B2 (en) | 2010-04-27 | 2013-04-02 | Electrolux Home Products, Inc. | Ice maker with rotating ice mold and counter-rotating ejection assembly |
DE102010055985A1 (en) * | 2010-10-26 | 2012-04-26 | Liebherr-Hausgeräte Ochsenhausen GmbH | Cooling and/or freezing apparatus with refrigeration circuit, has collectors that are arranged at downstream of branch point of partial lines connected with vaporizers, for collecting liquid or vapor refrigerant |
DE102019201427B4 (en) | 2019-02-05 | 2022-01-13 | Audi Ag | Method for operating a refrigerant circuit of a refrigeration system of a vehicle |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE657071C (en) * | 1935-04-06 | 1938-02-23 | Westinghouse Electric & Mfg Co | Method and device for regulating the cold room temperature of a compression refrigeration machine |
US2229940A (en) * | 1939-12-28 | 1941-01-28 | Gen Electric | Refrigerant distributor for cooling units |
US2624815A (en) * | 1945-05-07 | 1953-01-06 | Westinghouse Electric Corp | Circuit breaker |
US4679404A (en) * | 1979-07-31 | 1987-07-14 | Alsenz Richard H | Temperature responsive compressor pressure control apparatus and method |
RO105625B1 (en) * | 1988-01-22 | 1992-10-30 | Proizv Ob Vypusku Bytovykh Kho | Refrigeration set for refrigerating plants with two chambers |
KR950002921Y1 (en) * | 1991-01-30 | 1995-04-17 | 삼성전자 주식회사 | Controlling circuit of multi-air conditioner |
US6055818A (en) * | 1997-08-05 | 2000-05-02 | Desert Aire Corp. | Method for controlling refrigerant based air conditioner leaving air temperature |
US5987916A (en) * | 1997-09-19 | 1999-11-23 | Egbert; Mark | System for supermarket refrigeration having reduced refrigerant charge |
US6023940A (en) * | 1998-07-06 | 2000-02-15 | Carrier Corporation | Flow distributor for air conditioning unit |
DE19830757A1 (en) * | 1998-07-09 | 2000-01-13 | Behr Gmbh & Co | Air conditioning system especially for a motor vehicle |
JP3464949B2 (en) * | 1999-09-21 | 2003-11-10 | 株式会社東芝 | refrigerator |
US6502413B2 (en) * | 2001-04-02 | 2003-01-07 | Carrier Corporation | Combined expansion valve and fixed restriction system for refrigeration cycle |
-
2003
- 2003-04-15 SE SE0301139A patent/SE0301139D0/en unknown
-
2004
- 2004-04-07 EP EP04726356A patent/EP1616136B1/en not_active Expired - Lifetime
- 2004-04-07 NZ NZ542807A patent/NZ542807A/en unknown
- 2004-04-07 AT AT04726356T patent/ATE372490T1/en not_active IP Right Cessation
- 2004-04-07 CN CN200480009969.XA patent/CN1777780A/en active Pending
- 2004-04-07 DE DE602004008761T patent/DE602004008761T2/en not_active Expired - Fee Related
- 2004-04-07 JP JP2006508011A patent/JP2006523819A/en active Pending
- 2004-04-07 US US10/552,096 patent/US20060130515A1/en not_active Abandoned
- 2004-04-07 AU AU2004230744A patent/AU2004230744A1/en not_active Abandoned
- 2004-04-07 WO PCT/SE2004/000547 patent/WO2004092661A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2004092661A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2006523819A (en) | 2006-10-19 |
SE0301139D0 (en) | 2003-04-15 |
WO2004092661A1 (en) | 2004-10-28 |
US20060130515A1 (en) | 2006-06-22 |
DE602004008761T2 (en) | 2008-06-12 |
DE602004008761D1 (en) | 2007-10-18 |
EP1616136B1 (en) | 2007-09-05 |
AU2004230744A1 (en) | 2004-10-28 |
NZ542807A (en) | 2008-04-30 |
ATE372490T1 (en) | 2007-09-15 |
CN1777780A (en) | 2006-05-24 |
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