EP0392521B1 - Dispositif frigorifique et méthode de commande de ce dispositif - Google Patents

Dispositif frigorifique et méthode de commande de ce dispositif Download PDF

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Publication number
EP0392521B1
EP0392521B1 EP90106983A EP90106983A EP0392521B1 EP 0392521 B1 EP0392521 B1 EP 0392521B1 EP 90106983 A EP90106983 A EP 90106983A EP 90106983 A EP90106983 A EP 90106983A EP 0392521 B1 EP0392521 B1 EP 0392521B1
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EP
European Patent Office
Prior art keywords
block
compartment
compressor
refrigerating device
temperature
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.)
Expired - Lifetime
Application number
EP90106983A
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German (de)
English (en)
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EP0392521A3 (fr
EP0392521A2 (fr
Inventor
Domenico Cappelletti
Valerio Aisa
Pietro Mariani
Francesco Santini
Alberto Mariani
Natale Monaldi
Aurelio Boninsegni
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.)
Whirlpool EMEA SpA
Original Assignee
Merloni Elettrodomestici SpA
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Publication date
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Publication of EP0392521A2 publication Critical patent/EP0392521A2/fr
Publication of EP0392521A3 publication Critical patent/EP0392521A3/fr
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Publication of EP0392521B1 publication Critical patent/EP0392521B1/fr
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Expired - Lifetime 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
    • F25D29/00—Arrangement or mounting of control or safety 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
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/31—Low ambient temperatures
    • 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • 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
    • 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
    • F25D2400/30—Quick freezing
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • the present invention relates to a refrigerating device as defined in the preamble of claim 1 and to a method for controlling its operation according to the preamble of claim 11.
  • a refrigerating device as defined in the preamble of claim 1 and to a method for controlling its operation according to the preamble of claim 11.
  • Such a device and method are known, for instance, from EP-A-0 298 349.
  • Refrigerating devices of the above mentioned type are known; they represent probably the most widespread type of domestic refrigerators.
  • the two evaporators located respectively in the first compartment (fresh food compartment or 'refrigerator') and in the second compartment ('freezer'), are arranged in series on the same refrigerating circuit, driven, for costs reasons, by one compressor only.
  • the freezer compartment is practically 'towed' by the fresh food compartment (normally called 'refrigerator' compartment), the two evaporators being in series between themselves, and the thermostatic control being done with reference to the 'refrigerator' compartment only.
  • thermostatic control is done by means of a normal electromechanical thermostat just placed into the refrigerator compartment, equipped with a knob for the manual setting of the desired temperature, within certain limits.
  • GB-A-2 045 980 describes a refrigerating device of the above cited type, where two sensors are provided in the fresh food compartment: one in air and the other on the plate of the evaporator; the control system comprises a thermostatic system of electronic type and the compressor is enabled when the plate of the evaporator reaches the temperature of +4°; the compressor is then disabled when the air probe detects that the temperature is fallen to the value manually input by the user.
  • EP-A-0 045 728 also describes a refrigerating device of the above cited type, similar to the one described in the previous patent application, which provides, besides the usual thermostat, a thermistor placed in the fresh food compartment, in the point where the air is lower; when the compressor must operate for a long time, to fastly freeze the food, the thermistor commutates the output of the comparator, which acts on the circuit of the thermostat and switches off the compressor in order to impede that, in the other compartment, the temperature falls below zero degree.
  • the known systems have many drawbacks, first of all that, into very cold rooms, the compressor remains disabled for long time intervals and the temperature of the 'freezer' compartment reaches dangerous values for the storing of the food therein contained.
  • control means operable to selectively vary the rotational speed of a fan for correspondingly varying the thermal exchange rate between the evaporator and the air within the fresh food compartment; such control means may include a probe adapted to sense the ambient temperature.
  • Aim of the present invention is to indicate how it is possible to realize a refrigerating device which can correctly operate at different room temperatures, which allows manufacturing uniformity, reliability in use and a reduced cost.
  • number 1 indicates an electric fan
  • number 2 indicates the evaporator of the 'freezer' compartment
  • number 3 indicates a defrost heater located in the 'freezer' compartment
  • number 5 indicates the operation control device of the refrigerating device
  • number 4 indicates a knob for the regulation of the temperature (monoturn rotative linear potentiometer) which is part of said device
  • number 6 indicates a luminous warning light (LED) placed on said device
  • number 7 indicates a manual push (fast freezing) also located on said device
  • number 8 indicates the temperature probe of the evaporator of the 'refrigerator' compartment, connected to said device 5
  • number 9 indicates the air temperature probe of the same compartment, connected to the same device 5, and at last number 10 indicates the refrigerating fluid compressor.
  • the control device 5 consists of a plastic material casing, containing an integrated circuit, on which there are mounted in a known way, a certain number of components; among them there is comprised an integrated circuit of the semi-custom type, which is responsible for actuating the main control functions, and which will be described in more detail with reference to figure 2.
  • the dimensions of the casing of the device 5 are limited and are practically equivalent to those of a normal electromechanical thermostat.
  • Compressor 10 and the evaporators of the freezer and refrigerating compartments are over sized, in order to satisfy the refrigerating needs of the respective compartments even in tropical climates.
  • the central rectangle (R) represents the semi-custom integrated circuit above cited; all around there are represented the accessory components connected to it.
  • symbol B indicates the block generating system time base;
  • T indicates the block performing the thermostatic control function (described in detail with reference to figure 3);
  • symbol F indicates the block performing the control function of the operating ratio (described in detail with reference to figure 6);
  • symbol S1 indicates the block performing the defrost function of the 'freezer' compartment (described in detail with reference to figure 5);
  • symbol S2 indicates the block performing the defrost function of the 'refrigerator' compartment, which is similar to block S1;
  • symbol A indicates the block performing the autotest function, which is realized all the times that the refrigerating device is switched on; at last symbol G indicates the block performing the loads handling function.
  • the two temperature probes 11 and 14 are each connected in a bridge circuit, including a tension comparator (01,02) whose output is connected respectively to the block T for the probe 11 and to the block S2 for the probe 14.
  • Loads MC, 15, 17 and 18 are connected to the block G, which controls them.
  • the block 20 represents the start of the flowchart; the block 20 transmits the control to block 21, which is a test block to verify that there is at the moment a cold request (or that the temperature detected by the probe 11 is higher than the one input through the knob 4); in the affirmative case (output SI) the control goes over to block 27, in the negative (output NO) the control goes over to block 22.
  • Block 22 is a test block to verify that the compressor is disactived; in the affirmative case (output SI) the control goes over to block 23, in the negative (output NO) the control goes over to block 24.
  • Block 23 increases the count of the disactive compressor time and then transmits again the control to block 21;
  • block 24 is a test block to verify that the active compressor time is equal to or higher than 8 minutes; in the affirmative case (output SI) the control goes over to block 25, in the negative (output NO) the control goes back to block 21.
  • Block 25 disables the compressor and transmits the control to block 26; block 26 resets the active compressor time and returns the control to block 21.
  • Block 27 is a test block to verify that the compressor is active; in the affirmative case (output SI) the control goes over to block 28, in the negative (output NO) the control goes over to block 29.
  • Block 28 increases the count of the active compressor time, and returns the control to block 21.
  • Block 29 is a test block to verify that the disactive compressor time is equal to or higher than 8 minutes; in the affirmative case (output SI) the control goes over to block 30, in the negative (output NO) the control goes back to block 21.
  • Block 30 activates the compressor and transmits the control to the subsequent block 31, which in his turn, resets the count of the disactive compressor time and returns the control to block 21.
  • the imposition of an 8 minutes minimum time of activation-disactivation of the compressor has the aim to prevent stability problems, due to electric interferences, realizing the hysteresis function which is normally obtained by the voltage comparator. It is so obtained a reduction of the number of components associated to the voltage comparator 01 (fig. 2), as the wired hysteresis (positive feedback) is no longer necessary, and an increase of the immunity to the electric interferences (due to the absence of the said positive feedback).
  • the temperature hysteresis obtained in this way is equal to about one centigrade degree totally (half degree lower or higher).
  • block 40 represents the start of the flowchart; block 40 transmits the control to block 41, which is a test block to verify that the fast freezing function (so called 'fast freezer') is enabled; in the affirmative case (output SI) the control goes over to block 42, in the negative (output NO) the control goes over to block 43.
  • block 41 is a test block to verify that the fast freezing function (so called 'fast freezer') is enabled; in the affirmative case (output SI) the control goes over to block 42, in the negative (output NO) the control goes over to block 43.
  • Block 42 switches on the warning light, or confirms its switching on, and returns the control to block 41;
  • block 43 is a test block to verify that the defrost function is enabled; in the affirmative case (output SI) the control goes over to block 44, in the negative (output NO) the control goes over to block 45.
  • Block 44 activates or confirms the flashing operation of the warning light, and returns the control to block 41; block 45 switches off the warning light, or confirms its switching off, and returns the control to block 41.
  • block 50 represents the start of the flowchart; block 50 transmits the control to block 51, which is a test block to verify that the defrost function must start (the defrost cycles are normally required by the system, namely in fast freezing absence, every 14 hours for the freezer and every 7 hours for the refrigerator); in the affirmative case (output SI) the control goes over to block 52, in the negative (output NO) the control goes back to block 50.
  • block 51 is a test block to verify that the defrost function must start (the defrost cycles are normally required by the system, namely in fast freezing absence, every 14 hours for the freezer and every 7 hours for the refrigerator); in the affirmative case (output SI) the control goes over to block 52, in the negative (output NO) the control goes back to block 50.
  • Block 52 is a test block to verify that the compressor is disactivated; in the affirmative case (output SI) the control remains to block 52, in the negative (output NO) the control goes over to block 53.
  • Block 53 resets the count of the active compressor time and transmits the control to block 55.
  • Block 55 is a test block to verify that the compressor is disabled; in the affirmative case (output SI) the control goes over to block 58, in the negative (output NO) the control goes over to block 56.
  • Block 56 is a test block to verify that the compressor has been active for 3 hours; in the affirmative case (output SI) the control goes over to block 57, in the negative (output NO) the control goes over to block 54.
  • Block 54 increases the count of the active compressor time and returns the control to block 55; block 57 disables the compressor (said forced disactivation after a three hours uninterrupted operation can be necessary in case of high external temperature, when the compressor could be ever on) and transmits the control to block 58.
  • Block 58 enables the defrost heater and transmits the control to block 59; block 59 resets the count of the defrost time and transmits the control to block 60.
  • Block 60 is a test block to verify that the count of the defrost time has reached the predetermined maximum value (30 minutes); in the affirmative case (output SI) the control goes over to block 63, in the negative (output NO) the control goes over to block 61.
  • Block 61 is a test block to verify that the contact of the thermoprotector 16 is opened; in the affirmative case (output SI) the control goes over to block 63, in the negative (output NO) the control goes over to block 62.
  • Block 62 increases the count of the defrost time and returns the control to block 60; block 63 disables the defrost heater and returns the control to block 50.
  • the refrigerator defrost cycle operates in the same way; the end of the defrost cycle is determined by the probe 14, and precisely when the temperature that it detects is +4°C.
  • the block 65 represents the start of the flowchart; block 65 transmits the control to block 66, which is a test block to verify that the compressor is disabled; in the affirmative case (output SI) the control goes over to block 67, in the negative (output NO) the control goes back to block 66.
  • Block 67 resets the count of the disactive compressor time and transmits the control to block 68.
  • Block 68 which is a test block, verifies that the compressor is on; in the affirmative case (output SI) the control goes back to block 66, in the negative (output NO) the control goes over to block 69.
  • Block 69 which is a test block, verifies that the count of the disactive compressor time has reached the predetermined maxim value (80 minutes); in the affirmative case (output SI) the control goes over to block 71, in the negative (output NO) the control goes over to block 70.
  • Block 70 increases the count of the disactive compressor time, and transmits the control to block 68; block 71 enables the compressor and transmits the control to block 72.
  • Block 72 resets the count of the active compressor time and transmits the control to block 73.
  • Block 73 which is a test block, verifies that the count of the active compressor time has reached the predetermined maximum value (40 minutes); in the affirmative case (output SI) the control goes over to block 74, in the negative (output NO) the control goes over to block 75.
  • Block 74 disbles the compressor and transmits the control to block 66; block 75, which is a test block, verifies that the temperature in the refrigerator compartment is at the admissible minimum value (+1°); in the affirmative case (output SI) the control goes over to block 76, in the negative (output NO) the control goes over to block 77.
  • Block 76 activates the heater 18 of the refrigerator compartment and transmits the control to block 78; block 77 disables the heater 18 of the refrigerator compartment and transmits the control to block 78.
  • Block 78 from its side, increases the count of the active compressor time and returns the control to block 73.
  • the semi-custom integrated circuit included in the control device 5 according to the invention, besides the described characteristics, has also a memory function.
  • Such a function has the aim to memorize that a mains supply failure lasted for more than 10 seconds; in this case, when the mains supply returns, the compressor is activated for 45 minutes; simultaneously the regulation of the temperature to be maintained in the refrigerator compartment is simulated at +1°C.
  • Such a function is used in the manufacturing process to compare the performance (temperature progress referred to a fixed time interval).
  • the probe to measure the air temperature of the refrigerator compartment is represented by a resistor with negative temperature coefficient (NTC), directly welded on the printed circuit contained in the control device 5.
  • NTC negative temperature coefficient

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  • 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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (15)

  1. Appareil de réfrigération comprenant un premier compartiment destiné à contenir des aliments frais, un second compartiment de congélation et de stockage d'aliments, un circuit de réfrigération comprenant un compresseur (10), un condenseur, un premier et un second (2) évaporateur disposés dans le premier et le second compartiment respectivement, et au moins un capteur de température (11) placé dans le premier compartiment, caractérisé en ce qu'un dispositif de commande automatique (5) est destiné à imposer une durée minimale de chaque phase active et une durée maximale de chaque phase inactive du compresseur (10).
  2. Appareil de réfrigération selon la revendication 1, caractérisé par le fait qu'aucun capteur de température n'est présent à l'intérieur du second compartiment.
  3. Appareil de réfrigération selon la revendication 1, caractérisé par le fait que le dispositif de commande automatique (5) comporte un circuit intégré électronique (R).
  4. Appareil de réfrigération selon la revendication 1, caractérisé par le fait que le capteur de température (11) qui détecte la température de l'air dans le premier compartiment est réalisé sous forme d'une résistance de type NTC directement soudée sur un circuit imprimé qui fait partie du dispositif de commande automatique (5).
  5. Appareil de réfrigération selon la revendication 1, caractérisé en ce que le dispositif de commande automatique (5) comporte un dispositif de comptage du temps pendant lequel le compresseur (10) est inactif et un dispositif de comptage du temps pendant lequel le compresseur (10) est actif.
  6. Appareil de réfrigération selon la revendication 1, caractérisé par le fait que le dispositif de commande automatique (5) comporte un second capteur de température (14) sensible à la température de l'évaporateur du premier compartiment, le second capteur de température (14) étant utilisé pour la gestion des cycles de dégivrage.
  7. Appareil de réfrigération selon la revendication 6, caractérisé en ce qu'un dispositif de signalisation (6) est destiné à signaler le fait qu'un cycle de dégivrage et/ou de congélation rapide est en cours, le dispositif de signalisation étant en particulier de type visuel.
  8. Appareil de réfrigération selon la revendication 1, caractérisé par le fait que le dispositif de commande automatique (5) comporte un dispositif de détection et de mémorisation d'une panne d'alimentation du réseau électrique.
  9. Appareil de réfrigération selon la revendication 1, caractérisé par le fait que le dispositif de commande automatique (5) comporte un dispositif destiné à modifier artificiellement la régulation de la température qui doit être maintenue dans le premier compartiment, lorsque l'alimentation électrique reprend après une panne qui a dépassé une durée prédéterminée.
  10. Appareil de réfrigération selon les revendications 1 et 6, caractérisé par le fait que le circuit de réfrigération comporte en outre un organe (18) de chauffage de dégivrage commandé par le dispositif de commande automatique (5) et destiné à déclencher les cycles de dégivrage a intervalles réguliers et à les déterminer lorsque le second capteur de température (14) détecte une température prédéterminée de l'évaporateur du premier compartiment.
  11. Procédé de commande du fonctionnement d'un appareil de réfrigération comprenant un premier compartiment pour le stockage d'aliments frais, un second compartiment pour la congélation et le stockage d'aliments, un circuit de réfrigération comprenant un compresseur, un condenseur, un premier et un second évaporateur placés dans le premier et le second compartiment respectivement, et un capteur de température placé dans le premier compartiment, caractérisé par l'application d'une durée minimale à chaque phase active et d'une durée maximale à chaque phase inactive du compresseur.
  12. Procédé selon la revendication 11, caractérisé par l'application d'une phase active du compresseur de durée prédéterminée lorsque l'alimentation électrique revient après une panne d'alimentation de durée supérieure à un temps prédéterminé.
  13. Procédé selon l'une au moins des revendications 11 et 12, caractérisé par le réglage du débit des cycles de dégivrage de l'un au moins des évaporateurs à intervalles réguliers, et le réglage de la fin des cycles de dégivrage lorsque la température de l'évaporateur atteint une valeur prédéterminée.
  14. Procédé selon l'une au moins des revendications 11 à 13, caractérisé par la détection et/ou la mémorisation dans un dispositif à mémoire d'informations représentatives de l'événement représenté par la panne d'alimentation électrique au-delà d'une durée prédéterminée.
  15. Procédé selon l'une au moins des revendications 11 à 14, caractérisé par la modification artificielle de la régulation de la température qui doit être maintenue dans l'un des compartiments lorsque l'alimentation électrique reprend après une panne supérieure à un temps prédéterminé.
EP90106983A 1989-04-14 1990-04-11 Dispositif frigorifique et méthode de commande de ce dispositif Expired - Lifetime EP0392521B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8967277A IT1233203B (it) 1989-04-14 1989-04-14 Frigorifero perfezionato
IT6727789 1989-04-14

Publications (3)

Publication Number Publication Date
EP0392521A2 EP0392521A2 (fr) 1990-10-17
EP0392521A3 EP0392521A3 (fr) 1991-03-20
EP0392521B1 true EP0392521B1 (fr) 1995-12-27

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EP (1) EP0392521B1 (fr)
DE (1) DE69024395T2 (fr)
ES (1) ES2081866T3 (fr)
IT (1) IT1233203B (fr)

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IT1248098B (it) * 1991-04-18 1995-01-05 Merloni Elettrodomestici Spa Apparato elettrodomestico a controllo elettronico in particolare un frigorifero
IT1245076B (it) * 1991-04-18 1994-09-13 Merloni Elettrodomestici Spa Frigorifero
DE4132719C2 (de) * 1991-10-01 1998-01-15 Bosch Siemens Hausgeraete Mehrtemperaturen-Kühlschrank
IT1266851B1 (it) * 1994-06-08 1997-01-21 Merloni Elettrodomestici Spa Metodo per il controllo di un apparato frigorifero, ed apparato implementante tale metodo.
DE10219486A1 (de) 2002-04-30 2003-11-20 Rudolf Faude Elektrisches Kühlgerät
DE102012206828A1 (de) * 2012-04-25 2013-10-31 BSH Bosch und Siemens Hausgeräte GmbH Einkreis-Kältegerät

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DE2615206A1 (de) * 1976-04-08 1977-10-27 Bosch Siemens Hausgeraete Kuehlgeraet, insbesondere zweitemperaturen-kuehlschrank o.dgl.
EP0064873A3 (fr) * 1981-05-07 1983-06-08 R D Technology Limited Dispositif de surveillance et d'avertissement pour une installation frigorifique
US4546618A (en) * 1984-09-20 1985-10-15 Borg-Warner Corporation Capacity control systems for inverter-driven centrifugal compressor based water chillers
US4627245A (en) * 1985-02-08 1986-12-09 Honeywell Inc. De-icing thermostat for air conditioners
IT1220060B (it) * 1987-07-09 1990-06-06 Zanussi A Spa Industrie Apparecchio refrigerante a piu' temperature con circuito frigorigeno monocompressore e singola regolazione termostatica di temperatura

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EP0392521A3 (fr) 1991-03-20
IT1233203B (it) 1992-03-20
DE69024395D1 (de) 1996-02-08
DE69024395T2 (de) 1996-05-15
EP0392521A2 (fr) 1990-10-17
ES2081866T3 (es) 1996-03-16
IT8967277A0 (it) 1989-04-14

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