EP0142663A2 - Procédé et dispositif de commande du dégivrage pour pompes à chaleur - Google Patents

Procédé et dispositif de commande du dégivrage pour pompes à chaleur Download PDF

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Publication number
EP0142663A2
EP0142663A2 EP84111031A EP84111031A EP0142663A2 EP 0142663 A2 EP0142663 A2 EP 0142663A2 EP 84111031 A EP84111031 A EP 84111031A EP 84111031 A EP84111031 A EP 84111031A EP 0142663 A2 EP0142663 A2 EP 0142663A2
Authority
EP
European Patent Office
Prior art keywords
temperature
signal
temperature difference
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.)
Granted
Application number
EP84111031A
Other languages
German (de)
English (en)
Other versions
EP0142663A3 (en
EP0142663B1 (fr
Inventor
Karl Ing. grad. Mötz
Friedrich Jobst
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.)
MT Aerospace AG
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg AG
MAN Technologie 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 MAN Maschinenfabrik Augsburg Nuernberg AG, MAN Technologie AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Priority to AT84111031T priority Critical patent/ATE38555T1/de
Publication of EP0142663A2 publication Critical patent/EP0142663A2/fr
Publication of EP0142663A3 publication Critical patent/EP0142663A3/de
Application granted granted Critical
Publication of EP0142663B1 publication Critical patent/EP0142663B1/fr
Expired legal-status Critical Current

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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

Definitions

  • the invention relates to a method for defrosting heat pumps, in which the defrosting process is controlled as a function of the temperature difference between the evaporator temperature and the ambient temperature of the evaporator.
  • the object of the invention is to develop a method in which the defrosting process takes place as close as possible to the defrosting time actually required.
  • the setpoint temperature difference is varied according to the ambient temperature and thus adapted to the evaporator behavior. This creates a reliable control in which unnecessary defrosting is prevented and, on the other hand, the defrosting is initiated in good time to ensure the economical operation of the heat pump.
  • the setpoint temperature difference is preferably changed continuously as a function of the outside temperature or the ambient temperature of the evaporator. However, it is also possible to use a step-by-step control of the target temperature difference.
  • the initiation of the defrosting process is blocked at evaporator temperatures above 0 ° C. This reliably prevents unnecessary defrosting if, at such evaporator temperatures, the actual temperature difference exceeds the target value calculated from the current ambient temperature.
  • the defrosting process is carried out as quickly as possible, so as to keep the switch-off pauses of the heat pump as short as possible.
  • selectable different defrost signals are emitted according to a predetermined criterion, with which different defrosting processes can be initiated.
  • the defrost signals can preferably be made dependent on the ambient or supply air temperature of the evaporator.
  • the criterion can be chosen such that at an ambient temperature above about 3 - C is a defrost initiated by ambient air 5 *
  • the invention extends to an apparatus for performing the method, with the features characterized in claim 6.
  • Fig. 1 the heating circuit of a compression heat pump 10 is shown, which from an evaporator 11 for receiving the energy Q from the ambient air 12, a compressor 13, which compresses the refrigerant vapor from the evaporator 11 and a condenser 14, to which one Consumer 15 is connected.
  • a defrost controller 16 which receives the signals from an evaporator temperature sensor 17 and an ambient temperature sensor 18 and outputs a signal to an actuator 19 when defrosting is required. With the actuator 19, the compressor 13 is switched off and thus the defrosting process is initiated.
  • the defrosting process can also be initiated in other ways, such as by reversing or diverting the refrigerant flow.
  • a comparator 21 which is subject to hysteresis, the actual temperature difference signal ⁇ T thus formed is compared with a target temperature difference signal AT which is generated by a target value generator 22 as a function of the ambient temperature. Is the measured temperature difference ⁇ T higher than the calculated target values! , then the comparator 21 outputs a signal 23 with which the actuator 19 is activated to initiate the defrosting process.
  • the defrosting process ends when the temperature difference ⁇ T has decreased accordingly.
  • This straight line is shown at 32 in FIG. 2.
  • FIG. 3 shows a block diagram of a second exemplary embodiment of a defrost controller 40.
  • the defrost regulator 4o is fed by a direct current source 41, the output voltage of which is stabilized and filtered in a reference voltage generator 42.
  • Defrost controller 40 is also connected to ambient temperature sensor 18 and evaporator temperature sensor 17.
  • the sensors 17 and 18 are fed by a voltage source 47, which transforms the reference voltage U into a predetermined sensor voltage U.
  • the temperature signals 43 and 45 generated by the sensors 17, 18 are adapted and standardized to the voltage level of the circuit in amplifiers 50 and 51, respectively.
  • the amplified voltage signals 52 and 53 are processed to form four command signals 54 to 57 in the defrost controller 40.
  • the setpoint temperature difference ⁇ T s is generated by a function generator 62, namely from the current ambient temperature signal 52 and an externally adjustable voltage value 63 from a potentiometer 64, which corresponds to the temperature difference adapted for the respective application.
  • the target temperature difference is formed as a linear function according to curve 32.
  • the slope K of this function is variable here.
  • the command signal 54 generated in this way gives the commands "switch on defrost" or "end defrost".
  • the switching process for the defrosting process is, however, output by means of two logic AND links 65 and 66 as a function of further signals, namely the command signals 55 to 57.
  • the command signals 55 indicate whether the evaporator temperature is greater or less than 0 ° C., and they are generated by comparing the evaporator temperature signal 53 with a voltage value U corresponding to 0 ° C. in a comparator 71, which is also subject to hysteresis.
  • the command signals 56 and 57 are external temperature-dependent signals, which are generated by comparing the ambient temperature signal 52 with a voltage U k associated with a corresponding temperature in a third comparator 72, which is subject to hysteresis, and are reversed by means of a non-element 73.
  • Different defrosting processes can be initiated with these outside temperature-dependent command signals 56 and 57, each of which is entered into one of the logic AND linkages 65 and 66, respectively.
  • the outside temperature T a and the evaporator temperature T k are measured continuously and the setpoint T s is calculated continuously.
  • the comparator 61 If the temperature difference AT between the measured values exceeds the target value ⁇ T s , the comparator 61 outputs the defrost signal 54, which is received in both links 65 and 66. However, the logic AND logic operation 65 will only output a switching signal 74 if it simultaneously receives the signal 55 T k ⁇ 0 ° C. and the signal 56 namely T a ⁇ T uk (for example T a less than 5'C). As a result, a first switching process is carried out, for example switching off the heat pump operation and switching on the hot gas defrost.
  • the second link 66 will output a switching signal 75 with which, for example, only the heat pump operation is switched off.
  • the defrost controller 40 can be designed, for example, as shown in FIG. 4, the voltage signals required in each case being determined using appropriately designed voltage dividers.
  • a relay 80 which can be controlled by the comparator 72 and which connects the line for the command signal 54 to the output 74 or 75 for the switching signals, depending on the ambient temperature, is provided for switching between the defrosting processes which can be initiated before the defrost signals 74 or 75.
  • the command signal 55 for the 0 ° C evaporator temperature changeover is linked to the setpoint signal ⁇ T s and compared in comparator 61 'to form the command signal 54' with the actual value ⁇ T.

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)
EP84111031A 1983-09-20 1984-09-15 Procédé et dispositif de commande du dégivrage pour pompes à chaleur Expired EP0142663B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111031T ATE38555T1 (de) 1983-09-20 1984-09-15 Verfahren und vorrichtung zur abtauregelung von waermepumpen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833333907 DE3333907A1 (de) 1983-09-20 1983-09-20 Verfahren und vorrichtung zur abtauregelung von waermepumpen
DE3333907 1983-09-20

Publications (3)

Publication Number Publication Date
EP0142663A2 true EP0142663A2 (fr) 1985-05-29
EP0142663A3 EP0142663A3 (en) 1985-07-03
EP0142663B1 EP0142663B1 (fr) 1988-11-09

Family

ID=6209559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111031A Expired EP0142663B1 (fr) 1983-09-20 1984-09-15 Procédé et dispositif de commande du dégivrage pour pompes à chaleur

Country Status (3)

Country Link
EP (1) EP0142663B1 (fr)
AT (1) ATE38555T1 (fr)
DE (2) DE3333907A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164948A2 (fr) * 1984-06-12 1985-12-18 York International Corporation Système de commande et procédé pour le dégivrage du serpentin extérieur d'une pompe à chaleur
DE3539817A1 (de) * 1985-11-09 1987-05-14 Licentia Gmbh Verfahren zur messtechnischen ermittlung, anzeige und/oder der auswertung der an den kuehllamellen eines luftkuehlers auftretenden vereisung
EP0272196A2 (fr) * 1986-12-17 1988-06-22 Carrier Corporation Pompe à chaleur contrôlée par la température extérieure ambiante
EP0285690A1 (fr) * 1987-04-08 1988-10-12 Viessmann Werke GmbH & Co. Procédé et dispositif pour le dégivrage selon besoin dépendant de la température des installations frigorifiques
GB2340922A (en) * 1998-08-31 2000-03-01 Daewoo Electronics Co Ltd Refrigerator defrost controlling method
WO2001022014A1 (fr) * 1999-09-24 2001-03-29 Arçelik A.S. Commande de degivrage
EP1134519A2 (fr) * 2000-03-15 2001-09-19 Carrier Corporation Procédé et dispositif de commande de dégrivrage pour des pompes à chaleur réversibles
WO2002035165A1 (fr) * 2000-10-27 2002-05-02 BSH Bosch und Siemens Hausgeräte GmbH Appareil frigorifique a degivrage automatique
EP1591736A1 (fr) * 2004-04-30 2005-11-02 Lg Electronics Inc. Procédé de dégivrage pour un conditionneur d'air
EP2717002A1 (fr) * 2012-10-08 2014-04-09 Emerson Climate Technologies GmbH Procédé de détermination de moments de décongélation
CN111076364A (zh) * 2019-12-25 2020-04-28 珠海格力电器股份有限公司 换热器组件、空调及空调控制方法
DE102020123960A1 (de) 2020-09-15 2022-03-17 Viessmann Werke Gmbh & Co Kg Verfahren zum Betreiben einer Wärmepumpe und Wärmepumpe

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6192908A (ja) * 1984-10-12 1986-05-10 Diesel Kiki Co Ltd 車輛用空気調和装置
US4573326A (en) * 1985-02-04 1986-03-04 American Standard Inc. Adaptive defrost control for heat pump system
US4882908A (en) * 1987-07-17 1989-11-28 Ranco Incorporated Demand defrost control method and apparatus
DE4105880A1 (de) * 1991-02-25 1992-08-27 Kueba Kaeltetechnik Gmbh Verfahren und vorrichtung zur leistungsoptimierung und abtausteuerung von kaeltemittelverdampfern
DE10223716A1 (de) * 2002-05-28 2003-12-11 Linde Ag Verfahren zum Steuern des Abtauprozesses eines Verdampfers
EP2366968B1 (fr) * 2010-03-17 2017-05-17 Wolf GmbH Procédé et dispositif de décongélation d'un évaporateur d'un dispositif de pompe à chaleur
ES2762238T3 (es) * 2010-07-01 2020-05-22 Carrier Corp Desescarchado a demanda con saturación de refrigerante del evaporador

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362350A1 (fr) * 1976-08-18 1978-03-17 Bosch Gmbh Robert Dispositif pour degivrer des evaporateurs de circuits frigorifiques, notamment de pompes de chaleur
FR2427563A1 (fr) * 1978-05-30 1979-12-28 Gen Electric Appareil de commande de degivrage pour systeme de conditionnement de la temperature
US4338790A (en) * 1980-02-21 1982-07-13 The Trane Company Control and method for defrosting a heat pump outdoor heat exchanger
JPS58150736A (ja) * 1982-03-03 1983-09-07 Hitachi Ltd 除霜制御回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950962A (en) * 1973-05-01 1976-04-20 Kabushiki Kaisha Saginomiya Seisakusho System for defrosting in a heat pump
DE3227604A1 (de) * 1981-07-29 1983-02-24 Olsberg Gesellschaft für Produktion und Absatz mbH, 5790 Brilon Automatische abtauregelvorrichtung fuer waermepumpen-verdampfer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362350A1 (fr) * 1976-08-18 1978-03-17 Bosch Gmbh Robert Dispositif pour degivrer des evaporateurs de circuits frigorifiques, notamment de pompes de chaleur
FR2427563A1 (fr) * 1978-05-30 1979-12-28 Gen Electric Appareil de commande de degivrage pour systeme de conditionnement de la temperature
US4338790A (en) * 1980-02-21 1982-07-13 The Trane Company Control and method for defrosting a heat pump outdoor heat exchanger
JPS58150736A (ja) * 1982-03-03 1983-09-07 Hitachi Ltd 除霜制御回路

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 7, Nr. 271 (M-260)[1416], 3. Dezember 1983; & JP - A - 58 150 736 (HITACHI SEISAKUSHO K.K.) 07.09.1983 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164948B1 (fr) * 1984-06-12 1989-07-19 York International Corporation Système de commande et procédé pour le dégivrage du serpentin extérieur d'une pompe à chaleur
EP0164948A2 (fr) * 1984-06-12 1985-12-18 York International Corporation Système de commande et procédé pour le dégivrage du serpentin extérieur d'une pompe à chaleur
DE3539817A1 (de) * 1985-11-09 1987-05-14 Licentia Gmbh Verfahren zur messtechnischen ermittlung, anzeige und/oder der auswertung der an den kuehllamellen eines luftkuehlers auftretenden vereisung
EP0272196A2 (fr) * 1986-12-17 1988-06-22 Carrier Corporation Pompe à chaleur contrôlée par la température extérieure ambiante
EP0272196A3 (en) * 1986-12-17 1988-08-31 Carrier Corporation Outdoor ambient temperature determination outdoor ambient temperature determination
EP0285690A1 (fr) * 1987-04-08 1988-10-12 Viessmann Werke GmbH & Co. Procédé et dispositif pour le dégivrage selon besoin dépendant de la température des installations frigorifiques
GB2340922B (en) * 1998-08-31 2003-01-08 Daewoo Electronics Co Ltd Refrigerator defrost controlling method
GB2340922A (en) * 1998-08-31 2000-03-01 Daewoo Electronics Co Ltd Refrigerator defrost controlling method
WO2001022014A1 (fr) * 1999-09-24 2001-03-29 Arçelik A.S. Commande de degivrage
EP1134519A2 (fr) * 2000-03-15 2001-09-19 Carrier Corporation Procédé et dispositif de commande de dégrivrage pour des pompes à chaleur réversibles
EP1134519A3 (fr) * 2000-03-15 2002-04-10 Carrier Corporation Procédé et dispositif de commande de dégrivrage pour des pompes à chaleur réversibles
CN100340829C (zh) * 2000-03-15 2007-10-03 开利公司 对可逆热泵除霜控制的方法和实施该方法的系统
WO2002035165A1 (fr) * 2000-10-27 2002-05-02 BSH Bosch und Siemens Hausgeräte GmbH Appareil frigorifique a degivrage automatique
CN1471622B (zh) * 2000-10-27 2010-05-26 Bsh博施及西门子家用器具有限公司 具有自动除霜功能的制冷装置
EP1591736A1 (fr) * 2004-04-30 2005-11-02 Lg Electronics Inc. Procédé de dégivrage pour un conditionneur d'air
EP2717002A1 (fr) * 2012-10-08 2014-04-09 Emerson Climate Technologies GmbH Procédé de détermination de moments de décongélation
CN111076364A (zh) * 2019-12-25 2020-04-28 珠海格力电器股份有限公司 换热器组件、空调及空调控制方法
DE102020123960A1 (de) 2020-09-15 2022-03-17 Viessmann Werke Gmbh & Co Kg Verfahren zum Betreiben einer Wärmepumpe und Wärmepumpe
DE102020123960B4 (de) 2020-09-15 2023-07-27 Viessmann Climate Solutions Se Verfahren zum Betreiben einer Wärmepumpe und Wärmepumpe

Also Published As

Publication number Publication date
EP0142663A3 (en) 1985-07-03
DE3475100D1 (en) 1988-12-15
DE3333907C2 (fr) 1988-05-11
ATE38555T1 (de) 1988-11-15
EP0142663B1 (fr) 1988-11-09
DE3333907A1 (de) 1985-04-04

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