EP0859208A2 - Installation de réfrigération et de congélation, procédé de commande d'un compresseur dans une installation de réfrigération et de congélation et circuit de commande pour un tel compresseur - Google Patents

Installation de réfrigération et de congélation, procédé de commande d'un compresseur dans une installation de réfrigération et de congélation et circuit de commande pour un tel compresseur Download PDF

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Publication number
EP0859208A2
EP0859208A2 EP98102408A EP98102408A EP0859208A2 EP 0859208 A2 EP0859208 A2 EP 0859208A2 EP 98102408 A EP98102408 A EP 98102408A EP 98102408 A EP98102408 A EP 98102408A EP 0859208 A2 EP0859208 A2 EP 0859208A2
Authority
EP
European Patent Office
Prior art keywords
compressor
chamber
refrigeration
temperature
cooling
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.)
Ceased
Application number
EP98102408A
Other languages
German (de)
English (en)
Other versions
EP0859208A3 (fr
Inventor
Iver Holm Iversen
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.)
Gram AS
Original Assignee
Gram AS
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 Gram AS filed Critical Gram AS
Publication of EP0859208A2 publication Critical patent/EP0859208A2/fr
Publication of EP0859208A3 publication Critical patent/EP0859208A3/fr
Ceased 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04—Refrigerators with a horizontal mullion

Definitions

  • the present invention relates to a fridge and freezer unit comprising a refrigeration chamber, a freezing chamber, a refrigeration system having a variable-speed compressor and a cooling circuit having a cooling surface in each of the chambers and temperature measuring means for use in controlling the compressor. Moreover, the invention relates to the method for controlling a compressor in a fridge and freezer unit comprising a refrigeration chamber, a freezing chamber, a refrigeration system having a variable-speed compressor and a cooling circuit having a cooling surface in each of the chambers. Moreover, the invention relates to the control circuit for a compressor in a fridge and freezer unit comprising a refrigeration chamber, a freezing chamber, a refrigeration system having a variable-speed compressor and a cooling circuit having a cooling surface in each of the chambers.
  • a fridge and freezer unit with two separate refrigeration systems, each comprising a compressor and a cooling circuit and a control device which is typically a thermostat.
  • a thermostat in each of the chambers will provide for start and stop of the refrigeration system based on pre-determined parameters so that a desired temperature is maintained within an interval in the actual storage chamber.
  • fridge and freezer units are known in which the control of the refrigeration system is effected by providing a magnetic valve in the refrigeration system.
  • the magnetic valve makes it possible for refrigerating medium only to run to the storage chamber, the refrigeration chamber or the freezing chamber in which refrigeration is necessary within the actual time interval.
  • This construction is disadvantageous as it is vulnerable to failure in the valve system. Moreover, it is difficult to obtain a good and secure function or a good energy economy for the system.
  • a fridge and freezer unit which is characterised in that said temperature measuring means comprise a temperature meter in the refrigeration chamber and a temperature meter in the freezing chamber, and that these temperature meters form part of a control circuit made to stop and start the compressor and to control its number of revolutions, respectively.
  • the method according to the invention is characterised in that the compressor is stopped and started following a signal from a temperature meter in one of the chambers, preferably the refrigeration chamber and that the number of revolutions of the compressor is determined following a signal from a temperature meter in the other chamber, preferably the freezing chamber.
  • the control circuit which is used is characterised in that it comprises a temperature meter to be arranged in one of the chambers, preferably the refrigeration chamber and which is made to start and stop the motor of compressor and a temperature meter to be arranged in the other chamber, preferably the freezing chamber and which is made for controlling the revolutions of the motor.
  • the temperature meter in the refrigeration starts and stops the compressor according to demand while another temperature meter, preferably a thermostat in the freezing chamber, controls the refrigeration output from the compressor through control of the number of revolutions, it becomes possible to control the temperature balance in the two storage chambers of the fridge and freezer unit by controlling the temperature balance of the cooling surfaces.
  • a thermostat in the refrigeration starts and stops the compressor according to demand while another temperature meter, preferably a thermostat in the freezing chamber, controls the refrigeration output from the compressor through control of the number of revolutions, it becomes possible to control the temperature balance in the two storage chambers of the fridge and freezer unit by controlling the temperature balance of the cooling surfaces.
  • By controlling the temperature balance of the cooling surfaces it is possible to maintain the temperature in the refrigeration chamber and the freezing chamber at the desired level independent of the ambient temperature.
  • both cooling surfaces will be active simultaneously. Accordingly, a difference in the cooling effect in the refrigeration chamber and the freezing chamber may only be obtained if the temperature difference between a cooling surface and goods in the refrigeration- and/or the freezing chamber is amended.
  • effect surface of cooling sur face x surface coefficient x temperature difference then this situation means that there will be no effect for cooling in the freezing chamber. If the number of revolutions for the compressor is slightly increased then this would provide a more cold cooling surface and a cooling in the freezing chamber will also occur. It is the relative difference between goods and cooling surface in the two chambers which gives the desired balance, thereby it is possible to obtained the desired temperatures of e.g. +5°C and -18°C in the refrigeration chamber and the freezing chamber, respectively.
  • the net result which occurs in the new situation will be a more cold freezing chamber and a refrigeration chamber having an unchanged temperature.
  • a higher number of revolutions for the compressor will change the balance so that relatively more cooling effect is added to the freezing chamber than the cooling effect added to the refrigeration chamber.
  • a lower number of revolutions will change the balance in such a way that relatively less cooling effect is added to the freezing chamber than the cooling effect added to the refrigeration chamber.
  • This principle of regulation means that the conditions in one of the chambers, preferably the refrigeration chamber, determines when the compressor shall run in order to maintain the temperature in this chamber whereas the conditions in the other chamber, preferably the freezing chamber, determines the magnitude of the effect which the compressor shall supply in order to maintain the desired temperature conditions in the other chamber.
  • the relative cooling effect which occurs in the two chambers shall be in balance with the cooling demand in the two chambers.
  • the imaginary example it is supposed that this is the case.
  • the increasing ratio between the temperature differences for the freezing chamber and the refrigeration chamber means that the freezing chamber will have too small cooling to maintain the desired temperature of -18°C.
  • the ambient temperature will drop to 5°C
  • a large cooling demand will still exist in the freezing chamber.
  • a fridge and freezing unit it will, according to the method and with the control circuit, be possible to control the relative cooling effect in the two chambers.
  • the earlier ratio of 6.75 between the refrigeration chamber and the freezing chamber may be influenced if the temperature of the cooling surfaces is changed. It is possible to change the temperature of the cooling surfaces in order to increase or decrease the number of revolutions for the motor of the compressor and thereby increase or decrease the output of the compressor.
  • the ratio between the relative cooling effects in the two chambers is regulated in order to be between 2 and 8 and preferably between 3 and 5.
  • the system may work satisfactorily at ambient temperature being minus degrees and at very high ambient temperatures.
  • ambient temperatures within an interval from -18°C to any high temperature which may be handled with a given capacity of the chosen compressor.
  • the temperature of the cooling surfaces of the cooling circuit may be chosen arbitrarily low dependent of the capacity of the compressor. Thus it is possible to make use of any temperature interval from -18°C or below.
  • the compressor which is used in the fridge and freezing unit may be any type in which the cooling effect may be controlled. However, from an energy economic point of view it is preferred to make use of a variable-speed compressor of the type having a permanent magnetic motor.
  • the fridge and freezing unit will conveniently be provided with the refrigeration chamber arranged above the freezing chamber and with a compressor arranged in a recess in the back of the unit between the two chambers. Alternatively, the compressor may be arranged in the bottom of the fridge and freezing unit below the two chambers. Moreover, it is possible to arrange the refrigeration chamber below the freezing chamber.
  • Fig. 1 shows a fridge and freezing unit 1 comprising a freezing chamber 2 and a refrigeration chamber 3.
  • the unit itself is illustrated partly in section as seen from the side.
  • a door 4 is intended for closing the freezing chamber 2 and a door 5 is intended for closing the refrigeration chamber 3.
  • the unit comprises a variable-speed compressor 6 which is arranged in a recess 7 at the back of the unit in a position between the freezing chamber 2 and the refrigeration chamber 3.
  • the fridge and freezing unit comprises a cooling circuit which is illustrated in Fig. 3.
  • the cooling circuit is connected with the variable-speed compressor 6 through conduit means 9 and comprises a condensator 10, a cooling surface 11 for the refrigeration chamber 3 in the form of an evaporator plate and a cooling surface 12 for the freezing chamber 2 in the form of an evaporator casing.
  • the cooling circuit comprises a drying filter 13.
  • the compressor 6 is connected with an electronic motor control 14 which through conduit means is connected with the temperature measuring means in the refrigeration chamber 3 and in the freezing chamber 2.
  • the temperature meters are not illustrated, however, they will be known for a person skilled in the art.
  • the temperature meter in refrigeration chamber 3 is intended for stopping and starting the motor of the compressor 6 and the temperature meter in the freezing chamber 2 is intended for regulating the number of revolutions for the motor of the compressor 6.
  • the compressor motor is a permanent magnetic motor.
  • the unit illustrated functions in that the compressor 6 is stopped and started following the signal from the temperature meter in the refrigeration chamber 3 whereas the number of revolution for the motor of the compressor 6 is determined following a signal from the temperature meter in the freezing chamber 2.
  • a schematic diaphragm is illustrated which shows the construction of the control circuit for the compressor 6.
  • the compressor 6 is via a shaft 15 connected with the motor 16.
  • the motor 16 is connected with the motor control 14.
  • the motor control 14 is connected with a temperature regulator 17.
  • the compressor and the temperature regulators are connected with the fridge and freezing unit 1 itself.
  • the fridge and freezing unit 1 receives an ambient influence 18 consisting of the ambient temperature, new goods being placed in or withdrawn from the refrigeration chamber and/or the freezing chamber, and opening of the doors 4,5 to the refrigeration chamber and the freezing chamber, respectively.
  • the refrigeration system gives an influence 19 to the compressor in form of suction pressure, suction temperature and condensator pressure.
  • the compressor gives an influence 20 to the refrigeration system in form of a mass flow of cooling medium and temperature of the cooling medium.
  • the shaft 15 induces a number of revolutions 21. This number of revolution gives an influence 22,23 to the compressor 6 and to the motor 16.
  • the motor 16 gives an influence 24 on the motor control through a metering of voltage and power consumption.
  • the motor control gives an influence 25 on the motor 16 in form of a voltage determining the number of revolutions for the motor and/or the on-off condition of the motor.
  • the motor control receives an influence 26 from the temperature regulator 17 in form of a desired number of revolution.
  • the desired number of revolutions 26 is produced in the temperature regulator as a result of an input 27 for the desired temperature in a refrigeration department and an input 28 for a desired temperature in a freezing department.
  • the temperature regulator receives a signal 29 for the measured temperature in the freezing chamber and a signal 30 indicating the measured temperature in the refrigeration chamber.
  • control circuit 14 will establish a control of the compressor, and accordingly, a control of the temperature of the cooling surfaces 11,12 in order to establish a balance between the temperature thereof and the actual cooling demand in refrigeration chamber 3 and freezing chamber 2.

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  • 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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP98102408A 1997-02-18 1998-02-12 Installation de réfrigération et de congélation, procédé de commande d'un compresseur dans une installation de réfrigération et de congélation et circuit de commande pour un tel compresseur Ceased EP0859208A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK17297 1997-02-18
DK199700172A DK173726B1 (da) 1997-02-18 1997-02-18 Kombikøleskab, fremgangsmåde til styring af en kompressor i et kombikøleskab samt styrekreds til en sådan krompressor

Publications (2)

Publication Number Publication Date
EP0859208A2 true EP0859208A2 (fr) 1998-08-19
EP0859208A3 EP0859208A3 (fr) 2000-11-08

Family

ID=8090593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98102408A Ceased EP0859208A3 (fr) 1997-02-18 1998-02-12 Installation de réfrigération et de congélation, procédé de commande d'un compresseur dans une installation de réfrigération et de congélation et circuit de commande pour un tel compresseur

Country Status (3)

Country Link
EP (1) EP0859208A3 (fr)
DK (1) DK173726B1 (fr)
NO (1) NO307942B1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111319A3 (fr) * 1999-12-23 2002-01-09 Grundfos A/S Dispositif frigorifique
WO2002046668A1 (fr) * 2000-12-04 2002-06-13 Zanussi Elettromeccanica S.P.A. Appareil de refrigeration dote de plusieurs compartiments de stockage
WO2003025480A1 (fr) 2001-09-21 2003-03-27 Arçelik A.S. Procede de commande de refrigerateur
EP1398584A1 (fr) 2002-09-13 2004-03-17 Whirlpool Corporation Procédé de commande d'un réfrigérateur à plusieurs compartiments froids et réfrigérateur utilisant un tel procédé
EP1845322A2 (fr) 2006-04-13 2007-10-17 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de réfrigération et/ou de refroidissement
TWI489074B (zh) * 2010-07-28 2015-06-21 Toshiba Kk 冰箱
DE102015210109A1 (de) 2015-06-02 2016-12-08 BSH Hausgeräte GmbH Kältegerät mit einem Kältemittelverdichter

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508605A (en) * 1967-08-31 1970-04-28 Matsushita Electronics Corp Temperature control system for electric refrigerator
US4086780A (en) * 1975-09-09 1978-05-02 Bosch-Siemens Hausgerate Gmbh Refrigerating apparatus, in particular two-temperature refrigerator
US4718247A (en) * 1985-09-25 1988-01-12 Hitachi, Ltd. Refrigerator temperature control system
EP0565312A2 (fr) * 1992-04-06 1993-10-13 General Electric Company Moteur à commande intégrée
US5255530A (en) * 1992-11-09 1993-10-26 Whirlpool Corporation System of two zone refrigerator temperature control
EP0583560A2 (fr) * 1992-08-14 1994-02-23 BOSCH-SIEMENS HAUSGERÄTE GmbH Réfrigérateur et/ou congélateur équipé pour la connexion à du courant alternatif monophasé
US5534760A (en) * 1992-04-30 1996-07-09 Samsung Electronics Co., Ltd. Compressor control circuit
US5555736A (en) * 1994-01-11 1996-09-17 York International Corporation Refrigeration system and method
US5711159A (en) * 1994-09-07 1998-01-27 General Electric Company Energy-efficient refrigerator control system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508605A (en) * 1967-08-31 1970-04-28 Matsushita Electronics Corp Temperature control system for electric refrigerator
US4086780A (en) * 1975-09-09 1978-05-02 Bosch-Siemens Hausgerate Gmbh Refrigerating apparatus, in particular two-temperature refrigerator
US4718247A (en) * 1985-09-25 1988-01-12 Hitachi, Ltd. Refrigerator temperature control system
EP0565312A2 (fr) * 1992-04-06 1993-10-13 General Electric Company Moteur à commande intégrée
US5534760A (en) * 1992-04-30 1996-07-09 Samsung Electronics Co., Ltd. Compressor control circuit
EP0583560A2 (fr) * 1992-08-14 1994-02-23 BOSCH-SIEMENS HAUSGERÄTE GmbH Réfrigérateur et/ou congélateur équipé pour la connexion à du courant alternatif monophasé
US5255530A (en) * 1992-11-09 1993-10-26 Whirlpool Corporation System of two zone refrigerator temperature control
US5555736A (en) * 1994-01-11 1996-09-17 York International Corporation Refrigeration system and method
US5711159A (en) * 1994-09-07 1998-01-27 General Electric Company Energy-efficient refrigerator control system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111319A3 (fr) * 1999-12-23 2002-01-09 Grundfos A/S Dispositif frigorifique
US6675590B2 (en) 1999-12-23 2004-01-13 Grunfos A/S Cooling device
WO2002046668A1 (fr) * 2000-12-04 2002-06-13 Zanussi Elettromeccanica S.P.A. Appareil de refrigeration dote de plusieurs compartiments de stockage
WO2003025480A1 (fr) 2001-09-21 2003-03-27 Arçelik A.S. Procede de commande de refrigerateur
EP1398584A1 (fr) 2002-09-13 2004-03-17 Whirlpool Corporation Procédé de commande d'un réfrigérateur à plusieurs compartiments froids et réfrigérateur utilisant un tel procédé
EP1845322A2 (fr) 2006-04-13 2007-10-17 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de réfrigération et/ou de refroidissement
EP1845322A3 (fr) * 2006-04-13 2007-12-05 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de réfrigération et/ou de refroidissement
TWI489074B (zh) * 2010-07-28 2015-06-21 Toshiba Kk 冰箱
DE102015210109A1 (de) 2015-06-02 2016-12-08 BSH Hausgeräte GmbH Kältegerät mit einem Kältemittelverdichter
WO2016192949A1 (fr) 2015-06-02 2016-12-08 BSH Hausgeräte GmbH Appareil frigorifique comportant un compresseur frigorifique

Also Published As

Publication number Publication date
NO980617D0 (no) 1998-02-13
NO980617L (no) 1998-08-19
EP0859208A3 (fr) 2000-11-08
DK17297A (da) 1998-08-19
NO307942B1 (no) 2000-06-19
DK173726B1 (da) 2001-07-30

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