EP1554531B1 - Appareil frigorifique comportant un compartiment de stockage dans lequel le vide peut etre cree - Google Patents

Appareil frigorifique comportant un compartiment de stockage dans lequel le vide peut etre cree Download PDF

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Publication number
EP1554531B1
EP1554531B1 EP03769396.7A EP03769396A EP1554531B1 EP 1554531 B1 EP1554531 B1 EP 1554531B1 EP 03769396 A EP03769396 A EP 03769396A EP 1554531 B1 EP1554531 B1 EP 1554531B1
Authority
EP
European Patent Office
Prior art keywords
storage compartment
pump
refrigerating appliance
housing
pressure
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
EP03769396.7A
Other languages
German (de)
English (en)
Other versions
EP1554531A1 (fr
Inventor
Adolf Feinauer
Michael Neumann
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1554531A1 publication Critical patent/EP1554531A1/fr
Application granted granted Critical
Publication of EP1554531B1 publication Critical patent/EP1554531B1/fr
Anticipated expiration legal-status Critical
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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/12—Insulation with respect to heat using an insulating packing material
    • F25D2201/122—Insulation with respect to heat using an insulating packing material of loose fill type
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/043—Treating air flowing to refrigeration compartments by creating a vacuum in a storage compartment

Definitions

  • the invention relates to a refrigerator with a storage compartment surrounding a hollow-walled housing and with a vacuum pump which is connected via a suction line to a cavity of the housing.
  • the patent GB 389,535 shows a refrigerator with an evacuable storage compartment.
  • Patent US 2,550,040 shows a refrigerator with a storage compartment surrounding hollow-walled housing and with a vacuum pump which is connected via a suction line to a cavity of the housing and to the storage compartment.
  • Patent US 2550040 discloses a refrigerator according to the preamble of claim 1.
  • the object of the present invention is to provide a low-cost refrigeration appliance with which easily perishable foodstuffs can be stored over a long period of time.
  • the refrigeration device combines the advantages of an evacuatable storage compartment with the advantages of an actively pumped refrigeration device. Since, according to the invention, the same vacuum pump is responsible for generating a vacuum both in the hollow-walled housing and in the storage compartment, it is possible to dispense with a second vacuum pump. This reduces the manufacturing costs for the refrigeration device and its operating costs, because only a vacuum pump, which is an energy consumer, is provided. Finally, the use of only one pump takes up less space, so that larger storage space capacities are available in the interior of the refrigerator.
  • the refrigeration device has a control circuit for controlling the pump based on at least one arranged on the suction side of the pump pressure sensor.
  • a pressure sensor can be detected when a pressure in the hollow-walled housing or in the storage compartment exceeds a certain value to cause the pump in such a case to suck the excess pressure. In this way, a power-consuming unnecessary continuous operation of the pump is avoided because it is only put into operation when a need to maintain a required negative pressure occurs.
  • the control circuit controls the position of the valve based on the at least one pressure sensor.
  • the evacuability sensor is disposed on a door of the storage compartment for detecting the opening and closing state of the door.
  • the control circuit As long as the door is open, the pressure within the storage compartment does not decrease, but remains at a constant, the external ambient pressure corresponding value, which is also detected by the pressure sensor. A lack of pressure drop is for the control circuit, the signal that the door of the storage compartment is open. Only when the door of the storage compartment is closed again, a pressure drop occurs, which is registered by the sensor. Only when the sensor indicates the evacuability of the storage compartment, the control circuit switches the switching valve in the position with the high conductance, and the storage compartment is evacuated quickly.
  • the support material is preferably porous. Such a support material contributes to the thermal insulation of the interior of the refrigerator.
  • a support material granules based on silica or airgel Particularly preferred as a support material granules based on silica or airgel.
  • a compressor 12, a pump 13, a valve 15 and a control unit 18 are arranged in the operating area 8.
  • the pump 13 is a rough vacuum pump set to a target pressure of 100 mbar. It is connected via a suction line 14 with the inner cavity of the housing 2 and with the evacuable storage compartment 9.
  • a switching valve 15 is arranged, which is designed to assume a plurality of switching positions under the control of the control unit 18.
  • the pressure inside the storage compartment 9 and inside the hollow-walled housing 2 is permanently measured by the pressure sensors 16 and 17 and the result of the measurement is forwarded to the control unit 18.
  • a maximum upper limit is given in each case, which may not be exceeded. If one of the two sensors 16 or 17 now detects an exceeding of this limit value by the pressure monitored by it, the control unit 18 reacts by activating the valve 15 and switching the valve 15 so that the pump 13 is connected to the suction line 14 via the suction line 14 Storage compartment 9 or is connected to the cavity of the housing 2, depending on in which of the two exceeded the limit for the pressure by the corresponding sensor 16, 17 was detected.
  • control unit 18 the pump 13 in operation, so that the excess pressure is extracted and the total pressure in the storage compartment 9 and the housing 2 again below the predetermined limit falls.
  • the control unit 18 resets the pump 13. In this way it is ensured that the pump 13 is only in operation when it is needed to suck off an overpressure, whereby unnecessary energy consumption is suppressed.
  • the flap 11 To remove or deposit food from or into the storage compartment 9, the flap 11 must be opened.
  • the interior of the storage compartment 9 must first be flooded.
  • the flood valve 21 is provided, which is manually operated and closes as soon as it is released by the user.
  • the flap 11 is designed so that it pops up after pressure equalization.
  • the control unit 18 receives a signal via the data line 22, which indicates the open position of the flood valve 21.
  • the control unit 18 responds by bringing the switching valve 15 into the switching position, in which it connects the pump 13 and the storage compartment 9 with low conductance. While the storage compartment is open, the pump 13 continuously sucks a small, non-vanishing air flow from the storage compartment 9.
  • FIG. 2 shown in cross-section further embodiment of a refrigerator 1 according to the invention, the storage compartment 9, in contrast to the in FIG. 1 shown execution no flood valve.
  • the refrigerator according to FIG. 1 is equipped with only one pressure sensor 16 which is arranged in the suction line 14 between the pump 13 and the valve 15 and connected via a data line 19 to the control unit 18.
  • a door sensor 24 is present in the flap 11, which is also connected via the data line 22 to the control unit 18.
  • the valve 15 has a fourth connection, at which an open to the environment of the refrigerator ventilation duct 23 opens.
  • the valve is in the third switching stage, so that the pump 13 is connected via the suction line 14 with the cavity of the housing 2. In this case, prevails in the suction line 14, the same pressure as in the cavity. This is measured by the sensor 16 and mediated via the data line 19 to the control unit 18.
  • the control unit 18 is given a limit value for the pressure, wherein the control unit 18 causes the pump 13 to pump off an overpressure when this limit value is exceeded by the pressure. As soon as the pressure is again below a predetermined pressure, the pump 13 is switched off by the control unit 18.
  • the control unit 18 is caused via a manual switch, not shown, to switch the valve 15 in the first switching stage.
  • the interior of the storage compartment 9 is flooded via the suction line 14 and the ventilation line 23 with ambient air until a pressure equalization has been established. Subsequently, the flap 11 can be opened, or it jumps on pressure equalization.
  • the door sensor 24 registers the closure state (for example via the presence of an electrical contact or an interruption of an electrical contact) and forwards this information to the control unit 18 via the data line 22.
  • This causes the valve 15 to be switched to the second switching stage, so that the pump 13 is connected via the suction line 14 to the interior of the storage compartment 9, while the ventilation line 23 blocks and the cavity of the housing 2 are separated from the pump 13.
  • the pump 13 can pump out the storage compartment 9.
  • the pressure sensor 16 registers the prevailing pressure and transmits its measurement result to the control unit 18. As soon as the pressure falls below a predetermined value, the valve 15 is switched by the control unit 18 back to the third switching stage and the pump 13 is turned off. The refrigerator 1 then resumes normal operation.

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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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Claims (10)

  1. Appareil frigorifique (1) comprenant un boîtier (2) à parois creuses, entourant un compartiment de stockage (9), et une pompe à vide (13) qui est raccordée à un espace creux du boîtier (2) par l'intermédiaire d'une conduite d'aspiration (14), la conduite d'aspiration (14) étant en outre raccordée au compartiment de stockage (9), le boîtier (2) entourant une enceinte dans laquelle se trouvent le compartiment de stockage (9) et une chambre de stockage (6, 7) ne pouvant pas être mise sous vide, un circuit de commande (18) destiné à commander la pompe (13) à l'aide d'au moins un capteur de pression (16, 17) disposé du côté aspiration de la pompe (13) étant ménagé, caractérisé en ce qu'une vanne de commutation (15) destinée à la liaison sélective de pompe (13) avec l'espace creux ou avec le compartiment de stockage (9) est disposée dans la conduite d'aspiration (14), le circuit de commande (18) commandant la position de la vanne (15) à l'aide de l'au moins un capteur de pression (16, 17).
  2. Appareil frigorifique (1) selon la revendication 1, caractérisé en ce que le circuit de commande (18) est relié à un capteur (16, 24) destiné à enregistrer la possibilité de mise sous vide du compartiment de stockage (9).
  3. Appareil frigorifique (1) selon la revendication 1 et la revendication 2, caractérisé en ce que le circuit de commande (18) commande la vanne de commutation (15) afin de relier le compartiment de stockage (9) à la pompe (13) lorsque le capteur de mise sous vide (16, 24) enregistre la possibilité de mise sous vide du compartiment de stockage (9).
  4. Appareil frigorifique (1) selon la revendication 2 ou 3, caractérisé en ce que le capteur de mise sous vide (24) est disposé sur une porte (11) du compartiment de stockage (9) pour enregistrer l'état d'ouverture ou de fermeture de la porte (11).
  5. Appareil frigorifique (1) selon la revendication 2 ou 3, caractérisé en ce que le capteur de mise sous vide (16) est un capteur de pression, et en ce que la vanne (15) présente une position de commutation, dans laquelle elle présente une conductance élevée entre le compartiment de stockage (9) et la pompe (13), et une position de commutation ayant une conductance plus petite, non évanouissante, entre le compartiment de stockage (9) et la pompe (13).
  6. Appareil frigorifique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace vide du boîtier (2) contient un remplissage lâche d'une matière de support (5).
  7. Appareil frigorifique (1) selon la revendication 6, caractérisé en ce que la matière de support (5) est poreuse.
  8. Appareil frigorifique (1) selon la revendication 6 ou 7, caractérisé en ce que la matière de support (5) est un granulé à base d'acide silicique ou d'aérogel.
  9. Appareil frigorifique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la pompe (13) est une pompe à vide grossier.
  10. Appareil frigorifique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le compartiment de stockage (9) et/ou l'espace creux présentent des parois en matière plastique.
EP03769396.7A 2002-10-17 2003-10-15 Appareil frigorifique comportant un compartiment de stockage dans lequel le vide peut etre cree Expired - Lifetime EP1554531B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10248510A DE10248510A1 (de) 2002-10-17 2002-10-17 Kältegerät mit einem evakuierbaren Lagerfach
DE10248510 2002-10-17
PCT/EP2003/011442 WO2004036129A1 (fr) 2002-10-17 2003-10-15 Appareil frigorifique comportant un compartiment de stockage dans lequel le vide peut etre cree

Publications (2)

Publication Number Publication Date
EP1554531A1 EP1554531A1 (fr) 2005-07-20
EP1554531B1 true EP1554531B1 (fr) 2013-07-31

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EP03769396.7A Expired - Lifetime EP1554531B1 (fr) 2002-10-17 2003-10-15 Appareil frigorifique comportant un compartiment de stockage dans lequel le vide peut etre cree

Country Status (6)

Country Link
US (1) US7360371B2 (fr)
EP (1) EP1554531B1 (fr)
CN (1) CN1705854A (fr)
AU (1) AU2003278086A1 (fr)
DE (1) DE10248510A1 (fr)
WO (1) WO2004036129A1 (fr)

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Also Published As

Publication number Publication date
EP1554531A1 (fr) 2005-07-20
US20060010890A1 (en) 2006-01-19
WO2004036129A1 (fr) 2004-04-29
CN1705854A (zh) 2005-12-07
US7360371B2 (en) 2008-04-22
DE10248510A1 (de) 2004-04-29
AU2003278086A1 (en) 2004-05-04

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