EP0031945A3 - Heat pump defrost control - Google Patents

Heat pump defrost control Download PDF

Info

Publication number
EP0031945A3
EP0031945A3 EP80108162A EP80108162A EP0031945A3 EP 0031945 A3 EP0031945 A3 EP 0031945A3 EP 80108162 A EP80108162 A EP 80108162A EP 80108162 A EP80108162 A EP 80108162A EP 0031945 A3 EP0031945 A3 EP 0031945A3
Authority
EP
European Patent Office
Prior art keywords
air temperature
heat pump
outdoor air
defrost control
outdoor
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.)
Withdrawn
Application number
EP80108162A
Other languages
German (de)
French (fr)
Other versions
EP0031945A2 (en
Inventor
Robert T. Ruminsky
Stephen L. Serber
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Publication of EP0031945A2 publication Critical patent/EP0031945A2/en
Publication of EP0031945A3 publication Critical patent/EP0031945A3/en
Withdrawn legal-status Critical Current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
    • F25D21/006—Defroster control with electronic control circuits
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

An outdoor coil defrost control system for a reverse cycle refrigeration apparatus or heat pump comprises an outdoor air temperature sensor (30), a compressor operation signal generator (42) and a variable frequency oscillator (80) receiv­ ing the input signal indicative of the outdoor air temperature and generating an output signal the frequency of which varies as a non-linear function of the magnitude of the outdoor air temperature. A counter (C1 to CN) receives the output signal of the variable frequency oscillator. The refrigeration apparatus is placed into an outdoor coil defrost mode of operation upon the counter counting a preselected number of pulses
EP80108162A 1980-01-04 1980-12-23 Heat pump defrost control Withdrawn EP0031945A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10974380A 1980-01-04 1980-01-04
US109743 1980-01-04

Publications (2)

Publication Number Publication Date
EP0031945A2 EP0031945A2 (en) 1981-07-15
EP0031945A3 true EP0031945A3 (en) 1982-05-19

Family

ID=22329334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80108162A Withdrawn EP0031945A3 (en) 1980-01-04 1980-12-23 Heat pump defrost control

Country Status (2)

Country Link
EP (1) EP0031945A3 (en)
JP (1) JPS56102638A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328680A (en) * 1980-10-14 1982-05-11 General Electric Company Heat pump defrost control apparatus
US4751825A (en) * 1986-12-04 1988-06-21 Carrier Corporation Defrost control for variable speed heat pumps
JPH02134481U (en) * 1989-04-07 1990-11-08
EP2743615B1 (en) 2012-12-14 2020-10-07 Whirlpool Corporation Method for controlling the defrost of an evaporator in a refrigeration appliance
CN105004000B (en) * 2015-06-29 2017-11-07 宁波奥克斯电气股份有限公司 Defrosting control method during inverter air conditioner heating operation
CN115183401B (en) * 2022-06-30 2023-07-14 海信空调有限公司 Air conditioner and defrosting control method thereof
CN115342481A (en) * 2022-08-16 2022-11-15 宁波奥克斯电气股份有限公司 Control method and control device of air conditioner and air conditioner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466888A (en) * 1968-05-15 1969-09-16 Westinghouse Electric Corp Defrost controls for heat pumps
US3894404A (en) * 1974-07-29 1975-07-15 Honeywell Inc Hot gas defrost refrigeration system
FR2367997A1 (en) * 1976-10-15 1978-05-12 Borg Warner CONTROL DEVICE FOR REGULATING THE OPERATION OF A HEAT PUMP
US4132085A (en) * 1973-06-20 1979-01-02 Hitachi, Ltd. Control apparatus including an electronic timer
US4209994A (en) * 1978-10-24 1980-07-01 Honeywell Inc. Heat pump system defrost control

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031842Y2 (en) * 1971-07-08 1975-09-17
JPS5323053B2 (en) * 1973-10-29 1978-07-12

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466888A (en) * 1968-05-15 1969-09-16 Westinghouse Electric Corp Defrost controls for heat pumps
US4132085A (en) * 1973-06-20 1979-01-02 Hitachi, Ltd. Control apparatus including an electronic timer
US3894404A (en) * 1974-07-29 1975-07-15 Honeywell Inc Hot gas defrost refrigeration system
FR2367997A1 (en) * 1976-10-15 1978-05-12 Borg Warner CONTROL DEVICE FOR REGULATING THE OPERATION OF A HEAT PUMP
US4209994A (en) * 1978-10-24 1980-07-01 Honeywell Inc. Heat pump system defrost control

Also Published As

Publication number Publication date
JPS56102638A (en) 1981-08-17
EP0031945A2 (en) 1981-07-15

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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): CH DE FR GB

PUAL Search report despatched

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AK Designated contracting states

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

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18D Application deemed to be withdrawn

Effective date: 19830422

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SERBER, STEPHEN L.

Inventor name: RUMINSKY, ROBERT T.