EP0108906A3 - Defrosting method for the evaporator of a refrigerator machine used, for example, as a heat pump - Google Patents

Defrosting method for the evaporator of a refrigerator machine used, for example, as a heat pump Download PDF

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Publication number
EP0108906A3
EP0108906A3 EP83109864A EP83109864A EP0108906A3 EP 0108906 A3 EP0108906 A3 EP 0108906A3 EP 83109864 A EP83109864 A EP 83109864A EP 83109864 A EP83109864 A EP 83109864A EP 0108906 A3 EP0108906 A3 EP 0108906A3
Authority
EP
European Patent Office
Prior art keywords
time
defrosting
heating operation
value
defrosting process
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
EP83109864A
Other languages
German (de)
Other versions
EP0108906A2 (en
EP0108906B1 (en
Inventor
Franz-Georg Dr. Dipl.-Phys. Gartner
Dieter Kuhl
Hans Ulrich Schweer
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT83109864T priority Critical patent/ATE31808T1/en
Publication of EP0108906A2 publication Critical patent/EP0108906A2/en
Publication of EP0108906A3 publication Critical patent/EP0108906A3/en
Application granted granted Critical
Publication of EP0108906B1 publication Critical patent/EP0108906B1/en
Expired 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control

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)
  • Defrosting Systems (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

1. A method of defrosting an evaporator of a refrigerating machine which operates as a heat pump, comprising the following features : a) after each heating operation, a defrosting process is started, the end of which is determined by the instantaneous value of a variable of state ; b) after each defrosting process a new heating operation is started, the duration of which is determined by a linearly multiplied, positive difference between a defrosting time to be established, and the last defrosting time in each case ; c) below a predetermined instantaneous value of the external temperature, the heating operation time which in each case follows a defrosting process, is determined by the heating operation time which has preceded the defrosting process plus a time value which is calculated from the difference between the last but one and the last defrosting time, linearly multiplied by a positive amplification factor ; d) after a preceding heating operation, each defrosting process is terminated when a variable of state of the refrigerating medium reaches the predetermined instantaneous value in the evaporator ; e) above the predetermined instantaneous value of the external temperature, a defrosting process is initiated if the ratio of running time to shut-down time of the heat pump exceeds a predetermined value, for example 2:1 ; f) the time of the heating operation is limited by a minimum value and a maximum value ; g) the defrosting process is broken off and a switch-over takes place to the minimum heating time when, at the end of a preset time, for example seven minutes, the predetermined instantaneous value of the variable of state of the refrigerating medium contained in the evaporator has not been reached.
EP83109864A 1982-10-15 1983-10-03 Defrosting method for the evaporator of a refrigerator machine used, for example, as a heat pump Expired EP0108906B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83109864T ATE31808T1 (en) 1982-10-15 1983-10-03 METHOD OF DEFROSTING THE EVAPORATOR OF A REFRIGERATOR OPERATED FOR EXAMPLE AS A HEAT PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3238354 1982-10-15
DE19823238354 DE3238354A1 (en) 1982-10-15 1982-10-15 METHOD FOR DEFROSTING THE EVAPORATOR OF AN EXAMPLE OF A REFRIGERATOR USED AS A HEAT PUMP

Publications (3)

Publication Number Publication Date
EP0108906A2 EP0108906A2 (en) 1984-05-23
EP0108906A3 true EP0108906A3 (en) 1985-07-03
EP0108906B1 EP0108906B1 (en) 1988-01-07

Family

ID=6175859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109864A Expired EP0108906B1 (en) 1982-10-15 1983-10-03 Defrosting method for the evaporator of a refrigerator machine used, for example, as a heat pump

Country Status (3)

Country Link
EP (1) EP0108906B1 (en)
AT (1) ATE31808T1 (en)
DE (2) DE3238354A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8702722D0 (en) * 1987-02-06 1987-03-11 York Int Ltd Defrosting of heat exchangers
US4951473A (en) * 1988-10-12 1990-08-28 Honeywell, Inc. Heat pump defrosting operation
CN113899123B (en) * 2021-10-29 2022-12-13 四川虹美智能科技有限公司 Remote control defrosting method and system for intelligent refrigeration equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156350A (en) * 1977-12-27 1979-05-29 General Electric Company Refrigeration apparatus demand defrost control system and method
US4173871A (en) * 1977-12-27 1979-11-13 General Electric Company Refrigeration apparatus demand defrost control system and method
DE2945691A1 (en) * 1978-12-08 1980-06-19 Amf Inc METHOD AND DEVICE FOR DEFROSTING OR. DEFROSTING A HEAT EXCHANGER UNIT, PREFERABLY AN EVAPORATOR SNAKE, A TEMPERATURE CONDITIONING DEVICE
EP0021151A1 (en) * 1979-06-20 1981-01-07 Spectrol Electronics Corporation Adaptive defrost control and method
US4328680A (en) * 1980-10-14 1982-05-11 General Electric Company Heat pump defrost control apparatus
EP0063178A1 (en) * 1981-04-16 1982-10-27 KKW Kulmbacher Klimageräte-Werk GmbH Method of operating a heat pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156350A (en) * 1977-12-27 1979-05-29 General Electric Company Refrigeration apparatus demand defrost control system and method
US4173871A (en) * 1977-12-27 1979-11-13 General Electric Company Refrigeration apparatus demand defrost control system and method
DE2945691A1 (en) * 1978-12-08 1980-06-19 Amf Inc METHOD AND DEVICE FOR DEFROSTING OR. DEFROSTING A HEAT EXCHANGER UNIT, PREFERABLY AN EVAPORATOR SNAKE, A TEMPERATURE CONDITIONING DEVICE
EP0021151A1 (en) * 1979-06-20 1981-01-07 Spectrol Electronics Corporation Adaptive defrost control and method
US4328680A (en) * 1980-10-14 1982-05-11 General Electric Company Heat pump defrost control apparatus
EP0063178A1 (en) * 1981-04-16 1982-10-27 KKW Kulmbacher Klimageräte-Werk GmbH Method of operating a heat pump

Also Published As

Publication number Publication date
DE3238354A1 (en) 1984-04-19
DE3375202D1 (en) 1988-02-11
EP0108906A2 (en) 1984-05-23
ATE31808T1 (en) 1988-01-15
EP0108906B1 (en) 1988-01-07

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