EP0165220A2 - Kühlvorrichtung - Google Patents

Kühlvorrichtung Download PDF

Info

Publication number
EP0165220A2
EP0165220A2 EP85850192A EP85850192A EP0165220A2 EP 0165220 A2 EP0165220 A2 EP 0165220A2 EP 85850192 A EP85850192 A EP 85850192A EP 85850192 A EP85850192 A EP 85850192A EP 0165220 A2 EP0165220 A2 EP 0165220A2
Authority
EP
European Patent Office
Prior art keywords
evaporator
cooling
freezing
temperature
chamber
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
EP85850192A
Other languages
English (en)
French (fr)
Other versions
EP0165220A3 (en
EP0165220B1 (de
Inventor
Leif Gunnar Benny Andersson
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 AB
Original Assignee
Electrolux AB
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 AB filed Critical Electrolux AB
Publication of EP0165220A2 publication Critical patent/EP0165220A2/de
Publication of EP0165220A3 publication Critical patent/EP0165220A3/en
Application granted granted Critical
Publication of EP0165220B1 publication Critical patent/EP0165220B1/de
Expired legal-status Critical Current

Links

Images

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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • 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
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series

Definitions

  • the invention relates to an arrangement of the kind stated in the introductory part of Claim 1.
  • the means which senses the temperature of the cooling evaporator is arranged in direct thermal contact with the cooling evaporator.
  • Said means is arranged to act on the valve means so that the circulation of refrigerant through the cooling evaporator is cut off when the temperature of the cooling evaporator goes below a certain lower temperature and to re-establish the circulation, when the temperature goes above a certain higher temperature.
  • the higher temperature is usually about +3 0 C so as to ensure that the evaporator shall be defrosted, and the lower temperature so low, e.g. -20 C, that a sufficient cooling effect is obtained on the goods in the cooling chamber.
  • Fig. 1 shows a refrigerant circuit with one evaporator in a cooling chamber, one evaporator in a freezing chamber, a compressor to force the refrigerant through the circuit and an adjustable valve which leads the refrigerant through both evaporators
  • Fig. 2 shows the valve set so that the cooling evaporator is disconnected from the circuit
  • Fig. 3 shows how two different temperatures in the cooling chamber vary with the time at normal heat load in the freezing chamber
  • Fig. 4 shows how said temperatures vary when freezing takes place in the freezing chamber.
  • Fig. 1 10 designates a refrigerating unit with a cooling chamber 12, which shall be capable of keeping goods at a temperature of about +4 °C, and a freezing chamber 14, which shall be capable of keeping goods at a temperature of about - 18 °C.
  • the cooling chamber 12 is refrigerated by an evaporator 16 and the freezing chamber 14 by an evaporator 18.
  • the evaporator 16 is part of a circulation circuit for a refrigerant, and the circuit is constituted by a compressor 20, a condenser 21, a valve 22, restriction means in the form of a capillary tube 24, the evaporator 16 and the evaporator 18.
  • the evaporator 18 can also be connected to a circulation circuit for refrigerant constituted by the compressor 20, the condenser 21, the valve 22, see Fig. 2, restriction means in the form of a capillary tube 25 and the evaporator 18.
  • the temperature in the freezing chamber is monitored by a means 26 which at a certain higher temperature, e.g. -15 °C, gives a signal to the compressor 20 to start and at a certain lower temperature, e.g. - 23 °C, gives a signal to the compressor to stop.
  • a certain higher temperature e.g. -15 °C
  • a certain lower temperature e.g. - 23 °C
  • the temperature is monitored by a means 28 which is in thermal contact with the evaporator 16 via a heat-insulating plate 30.
  • the means 28 senses a certain higher temperature, e.g. + 3 °C
  • the means 28 gives a signal to the valve 22 to switch over to the position shown in Fig. 1 so that refrigerant can circulate through the evaporator 16.
  • the means 28 gives a signal to the valve 22 to switch to the position shown in Fig. 2, whereby the flow of refrigerant through the evaporator 16 ceases.
  • Figs. 3 and 4 examples are shown of the influence of the insulation 30 on the temperature T in the cooling chamber as a function of the time t.
  • the compressor 20 is supposed to be running during the whole course shown in Figs. 3 and 4.
  • Fig. 3 shows the temperature course in the cooling chamber at normal operation of the freezing chamber, i.e. when freezing does not take place in it, the continuous curve 32 showing the temperature of the evaporator 16 and the broken curve 34 showing the temperature of the means 28.
  • the means 28 gives a signal to the valve 22 to admit refrigerant to the evaporator 16.
  • the evaporator 16 has a temperature of - 20 °C, while the temperature of the means 28 lags behind due to the insulation 30 and is higher, - 15 °C.
  • the means 28 gives a signal to the valve 22 to cut off the supply of refrigerant to the evaporator 16.
  • the goods in the cooling chamber which has a temperature of about + 4 °C, then heat the evaporator 16 and the means 28.
  • the evaporator 16 reaches 0 C and the evaporator begins to defrost.
  • the time t 4 the evaporator 16 is defrosted and the course which started at t is repeated.
  • Fig. 4. shows the corresponding temperature course in the cooling chamber when freezing of goods takes place in the freezing chamber.
  • refrigerant is admitted through the evaporator 16.
  • the temperature in the evaporator 16 rises and it takes longer time before the means 28 reaches the lower temperature, - 15 °C, at which the means 28 gives a signal to cut off the circulation of the refrigerant through the evaporator 16.
  • the means 28 gives a signal to cut off the circulation of the refrigerant through the evaporator 16.
  • the temperatures of the evaporator 16 and the means 28 will follow each other better.
  • the said lower temperature has been reached.
  • the curves 32 and 34 will get substantially the same appearance as in Fig. 3.
  • the temperature of the evaporator 16 would continue to fall according to the dotted line 36. Not until the time t 7 the means 28 would initiate cutting off of the supply of refrigerant to the evaporator 16. But at the time t 7 the evaporator has taken so much heat from the goods in the cooling chamber that they have frozen, which can be prevented by the insulation 30 according to the present invention.
  • the temperature of the evaporator 16 at normal operation of the freezing chamber both in the known technique and in the invention, must be lowered to substantially the same lowest temperature, - 20 °C, in the example above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP19850850192 1984-06-13 1985-05-31 Kühlvorrichtung Expired EP0165220B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8403158A SE456693B (sv) 1984-06-13 1984-06-13 Anordning foer att hindra att varor fryser i en kylkammare
SE8403158 1984-06-13

Publications (3)

Publication Number Publication Date
EP0165220A2 true EP0165220A2 (de) 1985-12-18
EP0165220A3 EP0165220A3 (en) 1986-07-02
EP0165220B1 EP0165220B1 (de) 1988-07-13

Family

ID=20356213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850850192 Expired EP0165220B1 (de) 1984-06-13 1985-05-31 Kühlvorrichtung

Country Status (4)

Country Link
EP (1) EP0165220B1 (de)
DE (1) DE3563792D1 (de)
DK (1) DK159893C (de)
SE (1) SE456693B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246465A1 (de) * 1986-05-20 1987-11-25 INDUSTRIE ZANUSSI S.p.A. Kältemittelkreislauf mit Drehverdichter
US4741178A (en) * 1986-04-19 1988-05-03 Sanden Corporation Refrigerating apparatus for a vending machine
EP0344351A1 (de) * 1988-06-03 1989-12-06 VIA Gesellschaft für Verfahrenstechnik mbH Gas-Kältemittel-Wärmetauscher, insbesondere für Drucklufttrockner
EP1180653A4 (de) * 1999-05-17 2003-07-16 Matsushita Refrigeration Kühlschrank und abtauheizvorrichtung
CN107543363A (zh) * 2017-08-01 2018-01-05 南京创维家用电器有限公司 一种保护电冰箱压缩机的方法、电冰箱及存储装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1072604A (fr) * 1952-01-04 1954-09-14 Gen Motors Corp Appareil frigorifique perfectionné
US3026688A (en) * 1961-01-23 1962-03-27 Gen Motors Corp Controls for two-compartment refrigerator
IT1111778B (it) * 1979-01-22 1986-01-13 Philco Italiana Macchina frigo-congelatrice a compressore unico
JPS5915782A (ja) * 1982-07-19 1984-01-26 株式会社東芝 冷蔵庫の温度制御装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741178A (en) * 1986-04-19 1988-05-03 Sanden Corporation Refrigerating apparatus for a vending machine
EP0246465A1 (de) * 1986-05-20 1987-11-25 INDUSTRIE ZANUSSI S.p.A. Kältemittelkreislauf mit Drehverdichter
EP0344351A1 (de) * 1988-06-03 1989-12-06 VIA Gesellschaft für Verfahrenstechnik mbH Gas-Kältemittel-Wärmetauscher, insbesondere für Drucklufttrockner
EP1180653A4 (de) * 1999-05-17 2003-07-16 Matsushita Refrigeration Kühlschrank und abtauheizvorrichtung
US6684659B1 (en) 1999-05-17 2004-02-03 Matsushita Refrigeration Company Refrigerator and defrosting heater
CN107543363A (zh) * 2017-08-01 2018-01-05 南京创维家用电器有限公司 一种保护电冰箱压缩机的方法、电冰箱及存储装置

Also Published As

Publication number Publication date
SE8403158D0 (sv) 1984-06-13
DE3563792D1 (en) 1988-08-18
SE456693B (sv) 1988-10-24
SE8403158L (sv) 1985-12-14
DK159893C (da) 1991-05-21
DK267385D0 (da) 1985-06-13
DK159893B (da) 1990-12-24
DK267385A (da) 1985-12-14
EP0165220A3 (en) 1986-07-02
EP0165220B1 (de) 1988-07-13

Similar Documents

Publication Publication Date Title
KR100341234B1 (ko) 냉장고
EP0593194B1 (de) Kühlsystem mit sequentiellem Betrieb mehrerer Verdampfer
US3050956A (en) Refrigerating apparatus with frost free compartment
US2487182A (en) Two-temperature refrigerator having means for defrosting
US4056948A (en) Presettable defrost timer
US4344294A (en) Thermal delay demand defrost system
US2133948A (en) Refrigeration apparatus
US3922874A (en) Evaporator fan delay circuit
US2706894A (en) Two temperature refrigerator
US2694297A (en) Refrigeration apparatus with means for maintaining food in frozen condition during defrosting
EP0165220A2 (de) Kühlvorrichtung
US2073123A (en) Refrigerating apparatus
US3138006A (en) Refrigerating apparatus including defrost means
US2484588A (en) Refrigerating apparatus having a freezing chamber and a storage chamber
US3108450A (en) Refrigeration apparatus
US2741095A (en) Refrigeratior having multiple section evaporator
JP3874941B2 (ja) 冷蔵庫
CA1204948A (en) Ice production rate selector for ice maker
US3081608A (en) Frozen food compartment for domestic refrigerator
US2333296A (en) Refrigerator
US3018637A (en) Refrigerator with defrost means
US1955087A (en) Refrigerating apparatus
US3206941A (en) Refrigerating apparatus with frost attracting evaporator
US2720759A (en) Refrigerating apparatus
US2072567A (en) Refrigerator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19861211

17Q First examination report despatched

Effective date: 19870709

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3563792

Country of ref document: DE

Date of ref document: 19880818

ET Fr: translation filed
ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970513

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970522

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970606

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980531

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980531

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990302

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST