EP1616136A1 - Systeme de refrigeration et son mode de fonctionnement - Google Patents

Systeme de refrigeration et son mode de fonctionnement

Info

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
Application number
EP04726356A
Other languages
German (de)
English (en)
Other versions
EP1616136B1 (fr
Inventor
Benny Andersson
Per-Olof Nilsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Publication of EP1616136A1 publication Critical patent/EP1616136A1/fr
Application granted granted Critical
Publication of EP1616136B1 publication Critical patent/EP1616136B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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.

Abstract

L'invention concerne un système de réfrigération comprenant un compresseur (10) qui est raccordé à un condenseur (14, 14a) par un circuit fermé contenant un réfirgérant circulant, et au moins deux évaporateurs (21, 28). Le circuit comprend un contenant (19, 19a) ou équivalent qui communique avec le condenseur (14, 14a) et a au moins une première sortie qui communique avec au moins un évaporateur (21) par une première valve (22, 22a). Le contenant (19, 19a) est destiné à recevoir et à stocker temporairemant un certain volume du réfrigérant s'écoulant du condenser. Le contenant (19, 19a) est également doté d'au moins une deuxième sortie (26, 26a) qui communique avec au moins un évaporateur additionnel (28) pour faire circuler la partie restante du réfrigérant par le ou les évaporateurs mentionnés (28) lorsque ce volume a été stocké dans le contenant (19, 19a), cette deuxième sortie (26, 26a) étant située au-dessus de cette sortie.
EP04726356A 2003-04-15 2004-04-07 Systeme de refrigeration et son mode de fonctionnement Expired - Lifetime EP1616136B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0301139A SE0301139D0 (sv) 2003-04-15 2003-04-15 Refrigeration system and a method for operating such system
PCT/SE2004/000547 WO2004092661A1 (fr) 2003-04-15 2004-04-07 Systeme de refrigeration et son mode de fonctionnement

Publications (2)

Publication Number Publication Date
EP1616136A1 true EP1616136A1 (fr) 2006-01-18
EP1616136B1 EP1616136B1 (fr) 2007-09-05

Family

ID=20291059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04726356A Expired - Lifetime EP1616136B1 (fr) 2003-04-15 2004-04-07 Systeme de refrigeration et son mode de fonctionnement

Country Status (10)

Country Link
US (1) US20060130515A1 (fr)
EP (1) EP1616136B1 (fr)
JP (1) JP2006523819A (fr)
CN (1) CN1777780A (fr)
AT (1) ATE372490T1 (fr)
AU (1) AU2004230744A1 (fr)
DE (1) DE602004008761T2 (fr)
NZ (1) NZ542807A (fr)
SE (1) SE0301139D0 (fr)
WO (1) WO2004092661A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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 (de) * 2010-10-26 2012-04-26 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
DE102019201427B4 (de) 2019-02-05 2022-01-13 Audi Ag Verfahren zum Betreiben eines Kältemittelkreislaufs einer Kälteanlage eines Fahrzeugs

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE657071C (de) * 1935-04-06 1938-02-23 Westinghouse Electric & Mfg Co Verfahren und Vorrichtung zur Regelung der Kuehlraumtemperatur einer Kompressionskaeltemaschine
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
WO1989006776A1 (fr) * 1988-01-22 1989-07-27 Proizvodstvennoe Obiedinenie Po Vypusku Bytovykh K Unite de refroidissement pour refrigerateur a deux chambres
KR950002921Y1 (ko) * 1991-01-30 1995-04-17 삼성전자 주식회사 멀티에어콘의 제어회로
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 (de) * 1998-07-09 2000-01-13 Behr Gmbh & Co Klimaanlage
JP3464949B2 (ja) * 1999-09-21 2003-11-10 株式会社東芝 冷蔵庫
US6502413B2 (en) * 2001-04-02 2003-01-07 Carrier Corporation Combined expansion valve and fixed restriction system for refrigeration cycle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004092661A1 *

Also Published As

Publication number Publication date
NZ542807A (en) 2008-04-30
JP2006523819A (ja) 2006-10-19
US20060130515A1 (en) 2006-06-22
DE602004008761T2 (de) 2008-06-12
SE0301139D0 (sv) 2003-04-15
AU2004230744A1 (en) 2004-10-28
WO2004092661A1 (fr) 2004-10-28
DE602004008761D1 (de) 2007-10-18
CN1777780A (zh) 2006-05-24
EP1616136B1 (fr) 2007-09-05
ATE372490T1 (de) 2007-09-15

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