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EP0881440A3 - Control of evaporator defrosting in an air-operated heat pump unit - Google Patents

Control of evaporator defrosting in an air-operated heat pump unit Download PDF

Info

Publication number
EP0881440A3
EP0881440A3 EP97119032A EP97119032A EP0881440A3 EP 0881440 A3 EP0881440 A3 EP 0881440A3 EP 97119032 A EP97119032 A EP 97119032A EP 97119032 A EP97119032 A EP 97119032A EP 0881440 A3 EP0881440 A3 EP 0881440A3
Authority
EP
European Patent Office
Prior art keywords
heat pump
pump unit
air
control
evaporator defrosting
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Withdrawn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
EP97119032A
Other languages
German (de)
French (fr)
Other versions
EP0881440A2 (en
Inventor
Luigi Rosso
Roberto Trecate
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.)
RC Group SpA
Original Assignee
R C CONDIZIONATORI SpA
Rc Condizionatori SpA
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 R C CONDIZIONATORI SpA, Rc Condizionatori SpA filed Critical R C CONDIZIONATORI SpA
Publication of EP0881440A2 publication Critical patent/EP0881440A2/en
Publication of EP0881440A3 publication Critical patent/EP0881440A3/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Withdrawn legal-status Critical Current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
    • 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
    • F25B2700/19—Pressures
    • F25B2700/197—Pressures of the evaporator
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air
    • 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
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator

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

In a heat pump unit that uses a refrigeration cycle and operates between a cold source (Sf) consisting of ambient air and a hot source (Sc), evaporator defrosting is operated on the base of external air temperature (TL) and pressure (PE) and/or temperature (TE) of the coolant gas in the evaporator, as reference parameters
EP97119032A 1997-05-27 1997-10-31 Control of evaporator defrosting in an air-operated heat pump unit Withdrawn EP0881440A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI971244 1997-05-27
IT97MI001244A IT1292014B1 (en) 1997-05-27 1997-05-27 EVAPORATOR DEFROST CONTROL IN AN AIR HEAT PUMP SYSTEM

Publications (2)

Publication Number Publication Date
EP0881440A2 EP0881440A2 (en) 1998-12-02
EP0881440A3 true EP0881440A3 (en) 1999-10-06

Family

ID=11377230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119032A Withdrawn EP0881440A3 (en) 1997-05-27 1997-10-31 Control of evaporator defrosting in an air-operated heat pump unit

Country Status (2)

Country Link
EP (1) EP0881440A3 (en)
IT (1) IT1292014B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7699000A (en) * 1999-09-24 2001-04-24 Arcelik A.S. Defrost control
US6334321B1 (en) * 2000-03-15 2002-01-01 Carrier Corporation Method and system for defrost control on reversible heat pumps
ITTO20011091A1 (en) * 2001-11-22 2003-05-22 Oscam Spa PLANT FOR CUTTING METAL BARS IN PRE-DETERMINED LENGTHS, ESPECIALLY FOR CONCRETE REINFORCEMENT.
WO2006045143A1 (en) * 2004-10-26 2006-05-04 Quantum Energy Technologies Pty Limited Control system for heat pump water heaters
DE102005054104A1 (en) * 2005-11-12 2007-05-24 Stiebel Eltron Gmbh & Co. Kg Compression refrigerator e.g. ventilation system, controlling method, for e.g. heating room, involves determining control value by combining two control values and adjusting throttle body to determined control value
ITMI20121677A1 (en) * 2012-10-08 2014-04-09 Dixell S R L Societa Unipersonale CONTROL SYSTEM FOR REFRIGERATED EQUIPMENT AND SYSTEMS WITH ADVANCED ENERGY SAVING FUNCTIONS
ITMI20150564A1 (en) * 2015-04-20 2016-10-20 Lu Ve Spa DEFROST PROCESS AND DEVICE, IN PARTICULAR FOR REFRIGERATION AND AIR CONDITIONING EQUIPMENT

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE3227604A1 (en) * 1981-07-29 1983-02-24 Olsberg Gesellschaft für Produktion und Absatz mbH, 5790 Brilon Automatic defrosting device for heat pump evaporators
DE3229135A1 (en) * 1982-08-04 1984-02-09 Siemens AG, 1000 Berlin und 8000 München Process for the operation of an air/water heat pump, and arrangement for performing the process
EP0115799A1 (en) * 1983-01-24 1984-08-15 NOVELERG Société Anonyme dite: Method and device for the control of the initiation and termination of the defrosting of a heat pump evaporator
JPS60117042A (en) * 1984-10-26 1985-06-24 Hitachi Ltd Air conditioner for heating and cooling
US4563877A (en) * 1984-06-12 1986-01-14 Borg-Warner Corporation Control system and method for defrosting the outdoor coil of a heat pump
US4573326A (en) * 1985-02-04 1986-03-04 American Standard Inc. Adaptive defrost control for heat pump system
JPS61101736A (en) * 1984-10-23 1986-05-20 Mitsubishi Heavy Ind Ltd Air conditioner defrosting control device
EP0285690A1 (en) * 1987-04-08 1988-10-12 Viessmann Werke GmbH & Co. Process and apparatus for the temperature dependent defrosting of cooling plants according to demand
US5507154A (en) * 1994-07-01 1996-04-16 Ranco Incorporated Of Delaware Self-calibrating defrost controller

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE3227604A1 (en) * 1981-07-29 1983-02-24 Olsberg Gesellschaft für Produktion und Absatz mbH, 5790 Brilon Automatic defrosting device for heat pump evaporators
DE3229135A1 (en) * 1982-08-04 1984-02-09 Siemens AG, 1000 Berlin und 8000 München Process for the operation of an air/water heat pump, and arrangement for performing the process
EP0115799A1 (en) * 1983-01-24 1984-08-15 NOVELERG Société Anonyme dite: Method and device for the control of the initiation and termination of the defrosting of a heat pump evaporator
US4563877A (en) * 1984-06-12 1986-01-14 Borg-Warner Corporation Control system and method for defrosting the outdoor coil of a heat pump
JPS61101736A (en) * 1984-10-23 1986-05-20 Mitsubishi Heavy Ind Ltd Air conditioner defrosting control device
JPS60117042A (en) * 1984-10-26 1985-06-24 Hitachi Ltd Air conditioner for heating and cooling
US4573326A (en) * 1985-02-04 1986-03-04 American Standard Inc. Adaptive defrost control for heat pump system
EP0285690A1 (en) * 1987-04-08 1988-10-12 Viessmann Werke GmbH & Co. Process and apparatus for the temperature dependent defrosting of cooling plants according to demand
US5507154A (en) * 1994-07-01 1996-04-16 Ranco Incorporated Of Delaware Self-calibrating defrost controller

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 272 (M - 425) 30 October 1985 (1985-10-30) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 281 (M - 520) 25 September 1986 (1986-09-25) *

Also Published As

Publication number Publication date
EP0881440A2 (en) 1998-12-02
IT1292014B1 (en) 1999-01-25
ITMI971244A1 (en) 1998-11-27
ITMI971244A0 (en) 1997-05-27

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