GB8702722D0 - Defrosting of heat exchangers - Google Patents

Defrosting of heat exchangers

Info

Publication number
GB8702722D0
GB8702722D0 GB878702722A GB8702722A GB8702722D0 GB 8702722 D0 GB8702722 D0 GB 8702722D0 GB 878702722 A GB878702722 A GB 878702722A GB 8702722 A GB8702722 A GB 8702722A GB 8702722 D0 GB8702722 D0 GB 8702722D0
Authority
GB
United Kingdom
Prior art keywords
defrost
determine whether
defrost cycle
defrosting
time taken
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.)
Pending
Application number
GB878702722A
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.)
York International Ltd
Original Assignee
York International Ltd
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 York International Ltd filed Critical York International Ltd
Priority to GB878702722A priority Critical patent/GB8702722D0/en
Publication of GB8702722D0 publication Critical patent/GB8702722D0/en
Priority to ES88300999T priority patent/ES2055736T3/en
Priority to EP88300999A priority patent/EP0278701B1/en
Priority to AT8888300999T priority patent/ATE105071T1/en
Priority to DE3889237T priority patent/DE3889237D1/en
Pending 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
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/11—Sensor to detect if defrost is necessary
    • F25B2700/111—Sensor to detect if defrost is necessary using an emitter and receiver, e.g. sensing by emitting light or other radiation and receiving reflection by a sensor

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

An adaptive heat exchanger defrost system e.g. for a heat pump evaporator, incorporates a system controller which adapts the intervals between defrost cycles to prevailing conditions in order to improve overall efficiency. The time taken to complete a defrost cycle is measured and compared with the time taken for the preceding defrost cycle to determine whether it is appropriate to increase or decrease the interval between samplings of the operating parameter used to determine whether a defrost cycle is required.
GB878702722A 1987-02-06 1987-02-06 Defrosting of heat exchangers Pending GB8702722D0 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB878702722A GB8702722D0 (en) 1987-02-06 1987-02-06 Defrosting of heat exchangers
ES88300999T ES2055736T3 (en) 1987-02-06 1988-02-05 THERMO-EXCHANGER DEFROSTING SYSTEM.
EP88300999A EP0278701B1 (en) 1987-02-06 1988-02-05 Improvements in or relating to defrosting of heat exchangers
AT8888300999T ATE105071T1 (en) 1987-02-06 1988-02-05 DEFROST SYSTEM FOR HEAT EXCHANGER.
DE3889237T DE3889237D1 (en) 1987-02-06 1988-02-05 Defrosting system for heat exchangers.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878702722A GB8702722D0 (en) 1987-02-06 1987-02-06 Defrosting of heat exchangers

Publications (1)

Publication Number Publication Date
GB8702722D0 true GB8702722D0 (en) 1987-03-11

Family

ID=10611837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB878702722A Pending GB8702722D0 (en) 1987-02-06 1987-02-06 Defrosting of heat exchangers

Country Status (5)

Country Link
EP (1) EP0278701B1 (en)
AT (1) ATE105071T1 (en)
DE (1) DE3889237D1 (en)
ES (1) ES2055736T3 (en)
GB (1) GB8702722D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1180652B1 (en) * 2000-08-18 2006-09-27 Ranco Incorporated of Delaware Controller and method for controlling a defrost operation in a refrigerator
US9562757B2 (en) 2009-10-02 2017-02-07 The Controls Group, Inc. Removal of an accumulated frozen substance from a cooling unit
FR3101137B1 (en) * 2019-09-19 2022-03-18 Guinault Sa Air conditioning unit for aircraft

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206612A (en) * 1977-07-15 1980-06-10 Emhart Industries, Inc. Refrigeration system control method and apparatus
DE2850198A1 (en) * 1978-11-18 1980-05-29 Hamadeh Deicing control for refrigerator plant - has heating elements controlled in groups with temp. sensor cut=out to minimise energy consumed
US4251988A (en) * 1978-12-08 1981-02-24 Amf Incorporated Defrosting system using actual defrosting time as a controlling parameter
US4680940A (en) * 1979-06-20 1987-07-21 Vaughn Eldon D Adaptive defrost control and method
US4328680A (en) * 1980-10-14 1982-05-11 General Electric Company Heat pump defrost control apparatus
DE3043459A1 (en) * 1980-11-18 1982-07-08 Linde Ag, 6200 Wiesbaden DEFROST THE REQUIRED FURNITURE
DE3110042A1 (en) * 1981-03-16 1982-09-30 Gesellschaft für Wärmepumpen und Energierückgewinnungsanlagen mbH, 7311 Holzmaden Method and arrangement for the defrosting of ice on an air cooler of a heat pump or refrigerator
DE3115599C2 (en) * 1981-04-16 1986-07-10 KKW Kulmbacher Klimageräte-Werk GmbH, 8650 Kulmbach Defrost control for a heat pump
US4395887A (en) * 1981-12-14 1983-08-02 Amf Incorporated Defrost control system
DE3235642A1 (en) * 1982-09-25 1984-03-29 3 E Elektronik-Elektro-Energieanlagen Baugesellschaft mbH, 5500 Trier Device for electric defrost regulation for the evaporator of a refrigerating plant
DE3238354A1 (en) * 1982-10-15 1984-04-19 Siemens AG, 1000 Berlin und 8000 München METHOD FOR DEFROSTING THE EVAPORATOR OF AN EXAMPLE OF A REFRIGERATOR USED AS A HEAT PUMP
US4538420A (en) * 1983-12-27 1985-09-03 Honeywell Inc. Defrost control system for a refrigeration heat pump apparatus
US4563877A (en) * 1984-06-12 1986-01-14 Borg-Warner Corporation Control system and method for defrosting the outdoor coil of a heat pump
US4627245A (en) * 1985-02-08 1986-12-09 Honeywell Inc. De-icing thermostat for air conditioners

Also Published As

Publication number Publication date
EP0278701A3 (en) 1989-10-04
ES2055736T3 (en) 1994-09-01
ATE105071T1 (en) 1994-05-15
EP0278701A2 (en) 1988-08-17
DE3889237D1 (en) 1994-06-01
EP0278701B1 (en) 1994-04-27

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