EP0153557B1 - Vorrichtung mit einem Kühlkreislauf - Google Patents

Vorrichtung mit einem Kühlkreislauf Download PDF

Info

Publication number
EP0153557B1
EP0153557B1 EP85100213A EP85100213A EP0153557B1 EP 0153557 B1 EP0153557 B1 EP 0153557B1 EP 85100213 A EP85100213 A EP 85100213A EP 85100213 A EP85100213 A EP 85100213A EP 0153557 B1 EP0153557 B1 EP 0153557B1
Authority
EP
European Patent Office
Prior art keywords
compressor
heat exchanger
refrigerant
valve
capillary tubes
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.)
Expired
Application number
EP85100213A
Other languages
English (en)
French (fr)
Other versions
EP0153557A2 (de
EP0153557A3 (en
Inventor
Fumio Mitsubishi Denki K.K Matsuoka
Hitoshi Mitsubishi Denki K.K Iijima
Original Assignee
Mitsubishi Electric Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8193223&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0153557(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to EP85100213A priority Critical patent/EP0153557B1/de
Priority to EP87109204A priority patent/EP0247638B1/de
Publication of EP0153557A2 publication Critical patent/EP0153557A2/de
Publication of EP0153557A3 publication Critical patent/EP0153557A3/en
Application granted granted Critical
Publication of EP0153557B1 publication Critical patent/EP0153557B1/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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part

Definitions

  • the present invention relates to refrigeration cycle apparatus comprising: a compressor, a first heat exchanger operable as a condenser, an expansion means and a second heat exchanger operable as an evaporator connected in series with each other; means for repeatedly starting and stopping said compressor; and means including a first check valve provided between an outlet of said compressor and an inlet of said first heat exchanger for isolating refrigerant on a high pressure side of said compressor from said refrigerant on a low pressure side of said compressor.
  • a storage tank is provided between the condensor and evaporator to provide pressure stabilization and to prevent migration of refrigerant to the condenser during the off cycle. But during these times, refrigerant liquid stored on the low pressure side in the evaporator is drawn into the compressor. The presence of the liquid refrigerant in the condenser increases the load on the compressor at the time of restarting the compressor. This lowers the coefficient of performance (hereinafter abbreviated as "COP") of the apparatus as compared with that during continuous operation.
  • COP coefficient of performance
  • Reversible refrigeration cycle apparatus is known from US-A-2 720 756 and includes an expansion device in the form of two capillary tubes coupled in series with a check valve across one tube to decrease the effective length of the expansion means in the cooling mode.
  • an expansion device in the form of two capillary tubes coupled in series with a check valve across one tube to decrease the effective length of the expansion means in the cooling mode.
  • An object of the invention is to improve the efficiency and simplify the construction of such apparatus thus enabling less expensive manufacture and reduction in size.
  • Another object of this invention is to enable the expansion coefficient of the apparatus to be varied between the heating and cooling modes in a single manner.
  • the apparatus defined in the first paragraph of this specification is characterised in that a reversing valve is provided between the compressor and first and second heat exchanger for reversing the functions of that heat exchanger to provide for an operation in a cooling or a heating mode, that said first check valve is arranged between the compressor outlet and said reversing valve, in that said expansion means comprises two capillary tubes coupled in series with each other between said first heat exchanger and said second heat exchanger and a second check valve provided in parallel with one of said capillary tubes so as to increase the effective length of said expansion means in said heating mode and to bypass said one of the capillary tubes in said cooling mode, and in that said isolating means further comprises a switching element provided between said capillary tubes and arranged to fully close when said compressor is stopped and to fully open when said compressor is started.
  • Reference numeral 1 designates generally a compressor.
  • a refrigerant gas compressed at high temperature and high pressure by the compressor 1 is fed through a check valve 2 and a four-way valve 3 into a condenser 4.
  • the refrigerant dissipates heat in the condenser 4 and is condensed to a high temperature and high pressure liquid.
  • the refrigerant liquid is passed through a capillary tube 12 where the refrigerant becomes a low temperature, low pressure liquid and a switching element 14 which acts as a valve and from there is introduced into an evaporator 7.
  • the low temperature and low pressure refrigerant liquid in the evaporator 7 absorbs heat and thus evaporates to a gas.
  • This refrigerant gas is again fed through the four-way valve 3 into an accumulator 8 which isolates the refrigerant liquid which cannot be evaporated in the evaporator 7 and is retained in the liquid state and which returns only the refrigerant gas again to the compressor 1. While the compressor 1 is operating, the apparatus repeats the refrigeration cycle.
  • Referernce numeral 9 illustrates a fan for the condenser 4 and 10 a fan for the evaporator 7.
  • the four-way valve 3 is a change-over or switching valve which operates so that the condenser 4 can be used as an evaporator and the evaporator 7 used as a condenser.
  • the evaporator 7 is used as an indoor side heat exchanger
  • the condenser 4 is used as an outdoor side heat exchanger.
  • the apparatus is operated in a refrigeration cycle which in the heating mode is switched by the four-way valve 3 so that the indoor side heat exchanger 7 is used as a condenser and the outdoor side heat exchanger 4 is used as an evaporator.
  • the air temperature conditioning system operates to detect the temperature in the room by a temperature detector or thermostat (not shown) and to start or stop the compressor 1 so as to maintain the room temperature at a set temperature by operating or stopping the refrigeration cycle apparatus.
  • the switching element 14, which isolates the compressor 1, is constructed so as to open when the compressor 1 is started and to close when the compressor 1 is stopped.
  • the element 14 and the check valve 2 function to isolate high pressure side refrigerant and low pressure side refrigerant when the compressor 1 is stopped.
  • the high pressure side refrigerant in the refrigeration cycle is isolated from the low pressure side refrigerant. Since the element 14 is then opened, a desired pressure difference between the high and low pressure side refrigerant can be attained in short time and the apparatus can reach the ordinary operating state in short time.
  • the conventional refrigerant cycle not incorporating such an isolating device requires about five minutes to reach the ordinary operation state after restarting.
  • the refrigeration cycle apparatus of the invention requires only about one minute and twenty seconds to make the transition.
  • the aforesaid switching element 14 may be a solenoid valve or another type of switching valve and may be any type which closes when the compressor 1 is stopped and opens when the compressor 1 is started.
  • a further capillary tube 13 in parallel with a check valve 15 which is constructed to pass the refrigerant in the illustrated cooling mode and to block the refrigerant in the non-illustrated heating mode with the valve 3 switched to its other position.
  • the check valve 15 is provided to effectively alter the length of the total capillary tube 12, 13 since the apparatus will operate more efficiently if the expansion coefficient of the refrigerant is varied between the cooling mode and the heating mode in such a manner that the capillary tube is effectively increased in length in the heating mode.
  • the apparatus can be inexpensively constructed, even if the check valve 15 is added.
  • the switching element 14 is constructed to compare the pressure P 2 , determined by the output side refrigerant gas (temperature of the evaporator 7 as detected by a heat sensitive tube provided between the outlet of the evaporator 7 and the inlet of the compressor 1, with the pressure P 1 of the refrigerant exhausted from the capillary tube 12, and to open when P 2 >P l and to close when P 2 ⁇ P ll in the same manner as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Claims (2)

1. Kühlkreislaufvorrichtung mit einem Kompressor (1), einen ersten Wärmetauscher (4), der als Kondensator betreibbar ist, mit einer Expansionseinrichtung (12, 13) und einem zweiten Wärmetauscher (7), der als Verdampfer betreibbar ist, die in Serie miteinander verbunden sind, mit einer Einrichtung zum wiederholen Starten und Anhalten des Kompressors (1); und mit einer Einrichtung (2, 14), die ein erstes Rückschlagventil (2) aufweist, das zwischen einem Auslaß des Kompressors (1) und einem Einlaß des ersten Wärmetauschers (4) zum Separieren des Kühlmittels auf einer Hochdruckseite des Kompressors (1) von dem Kühlmittel auf der Niedrigdruckseite des Kompressors (1) angeordnet ist, dadurch gekennzeichnet, daß ein Umschaltventil (3) zwischen dem Kompressor (1) und dem ersten (4) und dem zweiten (7) Wärmetauscher zum Umschalten der Funktionen dieses Wärmetauschers angeordnet ist, um einen Betrieb in einer Kühl- oder Erwärmungsbetriebsart einzustellen, daß das erste Rückschlagventil (2) zwischen dem Kompressorauslaß und dem Umschaltventil (3) angeordnet ist, daß die Expansionseinrichtung zwei Kapillarrohre (12,13), die in Serie zwischen dem ersten Wärmetauscher (4) und dem zweiten Wärmetauscher (7) miteinander verbunden sind, und daß ein zweites Rückschlagventil (15) parallel zu einem (13) der Kapillarrohre angeordnet ist, um die effektive Länge der Expansionseinrichtung in der Erwärmungsbetriebsart zu vergrößern und um das eine der Kapillarrohre in der Kühlbetriebsart zu umgeben, und daß die Separiereinrichtung ferner ein Schaltelement (14) aufweist, das zwischen den Kapillarrohren (12,13) angeordnet ist, und das vollständig schließt, wenn der Komperssor (1) angehalten wird, und das vollständig öffnet, wenn der Komperssor (1) gestartet wird.
2. Kühlkreislaufvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Umschaltventil (3) ein Vier-Wegeventil ist.
EP85100213A 1981-10-20 1981-10-20 Vorrichtung mit einem Kühlkreislauf Expired EP0153557B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP85100213A EP0153557B1 (de) 1981-10-20 1981-10-20 Vorrichtung mit einem Kühlkreislauf
EP87109204A EP0247638B1 (de) 1981-10-20 1981-10-20 Vorrichtung mit einem Kühlkreislauf

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85100213A EP0153557B1 (de) 1981-10-20 1981-10-20 Vorrichtung mit einem Kühlkreislauf

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP81108580.2 Division 1981-10-20

Publications (3)

Publication Number Publication Date
EP0153557A2 EP0153557A2 (de) 1985-09-04
EP0153557A3 EP0153557A3 (en) 1986-02-19
EP0153557B1 true EP0153557B1 (de) 1989-05-17

Family

ID=8193223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100213A Expired EP0153557B1 (de) 1981-10-20 1981-10-20 Vorrichtung mit einem Kühlkreislauf

Country Status (1)

Country Link
EP (1) EP0153557B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9300342A (pt) * 1993-02-09 1994-09-27 Brasil Compressores Sa Arranjo para partida de sistemas de refrigeração com diferença de pressão na partida
US5564280A (en) * 1994-06-06 1996-10-15 Schilling; Ronald W. Apparatus and method for refrigerant fluid leak prevention

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR811326A (fr) * 1936-01-21 1937-04-12 Sulzer Ag Machine frigorifique à compression
US2720756A (en) * 1954-12-29 1955-10-18 Gen Electric Heat pump, including fixed flow control means
US2969655A (en) * 1959-05-19 1961-01-31 Ranco Inc Reversible heat pump system
US3093976A (en) * 1962-04-20 1963-06-18 Carl O Walcutt Refrigeration system including receiver
US3131549A (en) * 1962-11-29 1964-05-05 Carrier Corp Heat pump control
US4081971A (en) * 1976-09-17 1978-04-04 The Trane Company Air cooled centrifugal refrigeration machine with provision to prevent evaporator freezing
US4267702A (en) * 1979-08-13 1981-05-19 Ranco Incorporated Refrigeration system with refrigerant flow controlling valve

Also Published As

Publication number Publication date
EP0153557A2 (de) 1985-09-04
EP0153557A3 (en) 1986-02-19

Similar Documents

Publication Publication Date Title
KR930002429B1 (ko) 냉동싸이클 장치
US5499508A (en) Air conditioner
JPH04295566A (ja) エンジン駆動式空気調和機
JPH04110576A (ja) ヒートポンプ式空気調和装置
US4869074A (en) Regenerative refrigeration cycle apparatus and control method therefor
EP0153557B1 (de) Vorrichtung mit einem Kühlkreislauf
EP0077414B1 (de) Luftklimatisierungssystem
EP0247638B1 (de) Vorrichtung mit einem Kühlkreislauf
JPH07190534A (ja) 蓄熱式空気調和装置
JP2955401B2 (ja) 空気調和機
JPH06337176A (ja) 空気調和装置
JPH025319Y2 (de)
JP2999763B2 (ja) マルチ型の空気調和機
JPH02157568A (ja) 空気調和装置の冷媒滞溜抑制装置
JPH07120119A (ja) 空気調和装置
JPS6346350B2 (de)
JPH0341744B2 (de)
JPH086206Y2 (ja) ヒートポンプ装置
JP2512072B2 (ja) 空気調和機の冷凍サイクル
JPH0113970Y2 (de)
JPH10141798A (ja) ヒ−トポンプ装置
JPH0633910B2 (ja) ヒ−トポンプ式冷凍装置
JP2533585B2 (ja) 多室形空気調和機
JPH024148A (ja) 空気調和機
KR0164883B1 (ko) 비공비 혼합 냉매를 이용한 냉동 싸이클을 갖는 공기 조화기

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

AC Divisional application: reference to earlier application

Ref document number: 77414

Country of ref document: EP

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

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19860414

17Q First examination report despatched

Effective date: 19860826

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 77414

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3177054

Country of ref document: DE

Date of ref document: 19890622

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: KKW KULMBACHER KLIMAGERAETE-WERK GMBH

Effective date: 19900215

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: KKW KULMBACHER KLIMAGERAETE-WERK GMBH

Effective date: 19900215

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

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

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19910308

ITTA It: last paid annual fee
ITPR It: changes in ownership of a european patent

Owner name: OFFERTA DI LICENZA AL PUBBLICO

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 19960611

REG Reference to a national code

Ref country code: FR

Ref legal event code: D6

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

Ref country code: FR

Payment date: 19991011

Year of fee payment: 19

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

Ref country code: GB

Payment date: 19991020

Year of fee payment: 19

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

Ref country code: DE

Payment date: 19991022

Year of fee payment: 19

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: 20001020

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

Effective date: 20001020

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

Ref country code: FR

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

Effective date: 20010629

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: 20010703

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST