EP0365650B1 - PROCEDE DE REFRIGERATION-CONSERVATION A DES TEMPERATURES SUPERIEURES A 0oC - Google Patents

PROCEDE DE REFRIGERATION-CONSERVATION A DES TEMPERATURES SUPERIEURES A 0oC Download PDF

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Publication number
EP0365650B1
EP0365650B1 EP89905086A EP89905086A EP0365650B1 EP 0365650 B1 EP0365650 B1 EP 0365650B1 EP 89905086 A EP89905086 A EP 89905086A EP 89905086 A EP89905086 A EP 89905086A EP 0365650 B1 EP0365650 B1 EP 0365650B1
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EP
European Patent Office
Prior art keywords
refrigerating
cold
frost
fresh air
arrangement according
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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
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EP89905086A
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German (de)
English (en)
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EP0365650A1 (fr
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Walter Holzer
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Individual
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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
    • F25D21/04—Preventing the formation of frost or condensate
    • 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
    • F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
    • 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

Definitions

  • the process essentially consists in that air is deep-frozen in a separate compartment of the refrigerator at the evaporator of the refrigerator and this frozen air is conveyed by a fan into the actual cooling space until the desired mixing temperature is reached and a thermostat switches the fan off.
  • the evaporator of the refrigeration machine condenses with the moisture in the circulating air and still freezes over. But this process does not extend to the actual cold room. The evaporator is thawed at certain intervals by heating and the melt water is drained off without disturbing.
  • a Nofrost cooling process of the type mentioned at the beginning is already known from US-A-2 143 183.
  • There are a drying room for the supplied air connected in series outside the cooling room, the air being cooled and humidified in a downstream additional room.
  • the air prepared in this way enters the actual cooling room and leaves it via a downstream exhaust air duct.
  • the known cooling device does not provide temperature control using fresh air.
  • a temperature control by means of fresh air is shown in US-A-2 161 421.
  • a refrigerator is described in which the cooling device runs continuously and the temperature in the cooling room is controlled by a flap if the temperature in the refrigerator falls below a certain value is opened, whereby the cold air can flow out and warm air can flow into the cold room.
  • the disadvantage of this refrigerator is that this simple regulation of the temperature by means of an exhaust air flap causes an immense waste of energy, since the cold air is simply discharged into the environment.
  • the refrigerator of conventional design described here has an evaporator, so that there are disadvantages of icing the evaporator and drying of the cooled air described above.
  • the object of the invention is to provide a method and the device which avoids these essential disadvantages described above and which also has the advantages of the Nofrost method.
  • the fresh air supplied ensures that the cooling space does not become too cold and the intended cooling area is maintained.
  • the incoming fresh air is naturally cooled by the convectors and would mean a loss of coldness after exiting the cold room; it is therefore proposed according to the invention to supply the cooled exhaust air to a heat exchanger which, for. B. is assigned to the hot condenser of the refrigerator, so that the cold is returned to the circuit of the refrigerator.
  • This effect can be further increased by pretreating the exhaust air heated in the heat exchanger in a closed circuit and supplying it as fresh air again.
  • fresh air is to be understood to mean that air is freshly supplied to the cooling space, a pretreatment being recommended according to the invention.
  • This pretreatment can be, for example, heating, as described above, but also cooling.
  • the cooling space is acted upon by cold, starting from convectors, fresh air of higher temperature being supplied to the cooling space via a fan with temperature control, a fresh air duct and at least one exhaust air duct being provided in connection with the cooling space. It is irrelevant whether the fan is in is arranged in the fresh air or supply air duct or in the exhaust air duct.
  • a switch valve can of course also be provided to switch from fresh air to cold air if necessary.
  • an arrangement according to the invention consists in that the surfaces of the convectors facing the cooling chamber are designed to be very thermally conductive in order to keep the incoming Bringing air quickly to the low temperature, but arranging less conductive layers under the surface in order to reduce the cold transfer through the wall of the convectors.
  • convectors it is proposed to design the convectors as cold stores, it being possible to design the convectors as latent cold stores in the simplest way. Especially in a temperature range above 0 ° C, the use of water or a water mixture with little addition of an agent lowering the freezing point is possible and inexpensive.
  • Another constructive measure to preserve sensitive foods gently without getting into the freezing temperature range is to provide an inner container in the cold room to hold the refrigerated goods and to arrange the supply air channels in such a way that the fresh air is at least partially in the space between the inner wall of the Cold room and the inner container flows. This prevents local hypothermia.
  • the refrigerator in order to be able to convert existing refrigerators to the new method, it is further proposed according to the invention to construct the refrigerator as an independent unit in the form of a slide-in unit, the walls serving for cold transmission, through which the cold of the freezer can get into the refrigerator
  • the additional components required such as fans and thermostats, in the range of the regulated temperature above 0 ° C.
  • the fresh air ducts and exhaust air ducts can be designed as flat hoses can also be easily led outside through the door gap of the door of the freezer.
  • a throttle valve which can be adjusted by hand in the area of the fresh air duct and / or the exhaust air duct.
  • a manually adjustable throttle valve serves the same purpose, which varies the supply of cold in the area of the convectors.
  • FIG. 1 is a schematic representation of a freezer (25) according to the invention, which has a cooling space (1) in its upper part.
  • a freezer compartment (34) in which the evaporator (27) of the refrigeration machine (5) is also located.
  • he cold room (1) and the freezer compartment (34) are separated by an intermediate wall (16) which essentially determines the inflow of cold into the cold room (1).
  • the cold reaches this throttled passage through the intermediate plate (16) to the convector (2), which is made of a good heat-conducting material, eg. B. aluminum.
  • the convector (2) which is made of a good heat-conducting material, eg. B. aluminum.
  • the ribs (17) also serve for improvement.
  • the convector (2) will now cool due to the cold flow, but as soon as a certain temperature, e.g. B. + 2 ° C is reached, the temperature control (10) switches on the fan (9) and fresh air passes through the fresh air duct (6) into the cooling chamber (1).
  • the convector (2) is warmed and kept at 2 ° C. However, as soon as the temperature exceeds 2 ° C the temperature control (10) switches off the fan (9) and the cooling chamber (1) is again exclusively under the influence of the cooling convector (2).
  • the primary cooling circuit consisting of the refrigeration machine (5), the condenser (4), a throttle valve (8) and the evaporator (27), is supplied with cooling by cooling the condenser.
  • the heat exchanger (3) can of course also be constructed separately from the condenser (4), as is customary in refrigeration systems.
  • Another improvement is to connect the exhaust air duct (7) through the connection (23) to the fresh air duct (6), so that a closed circuit is created.
  • FIG. 1 also schematically shows an expedient embodiment of the evaporator (27) in combination with a cold store (19), a latent cold store filled with liquid (20) also being suitable for the corresponding temperatures.
  • a solution which also enables the subsequent installation of such a cooling room in existing freezers.
  • the components for cold transmission are combined into one unit in the form of an insert (28).
  • Such an insert (28) expediently also carries the fan (9) and the temperature control (19), possibly also filters or humidification devices (24).
  • a throttle valve (35) is also shown schematically, which can change the cold transfer through the plate (16).
  • the purpose of this is e.g. B. in summer or in hot areas to increase the flow of cold.
  • the throttle valve (36) serves a similar purpose and influences the air flow accordingly.
  • FIG. 1 and FIG. 2 shows how numerous the variants and possibilities of a refrigerator according to the invention with fresh air cooling are.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Materials For Medical Uses (AREA)
  • Saccharide Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Storage Of Fruits Or Vegetables (AREA)

Claims (20)

  1. Procédé de réfrigération sans formation de givre pour une plage de réfrigération supérieure à 0°C, selon lequel la température souhaitée est réglée dans l'espace de réfrigération (1) grâce à l'amenée d'air frais à une température plus élevée, et la quantité de froid amenée par unité de temps dans cet espace de réfrigération (1) est inférieure à la quantité de chaleur amenée en présence d'une amenée d'air frais maximale, étant précisé qu'une amenée d'air frais commandée a lieu et que le froid est amené vers l'espace de réfrigération (1) grâce à des convecteurs (2), caractérisé en ce que l'air sortant déplacé par l'air frais entrant, et refroidi est amené vers un échangeur de chaleur (3) du condensateur (4) de la machine frigorifique (5), en ce qu'une séparation dans l'espace est prévue entre l'évaporateur (27) et l'espace de réfrigération (1), et en ce que le froid est amené de l'évaporateur (27) à l'espace de réfrigération (1) par l'intermédiaire d'éléments de construction (2, 16) situés entre les deux.
  2. Procédé de réfrigération sans formation de givre selon la revendication 1, caractérisé en ce que l'air sortant est amené vers l'espace de réfrigération (1) après avoir été réchauffé dans l'échangeur de chaleur (3) et traité préalablement dans un circuit fermé (23).
  3. Procédé de réfrigération sans formation de givre selon la revendication 1, caractérisé en ce que, lors d'un dépassement de la température limite supérieure de la plage de réfrigération, c'est de l'air froid qui est amené à la place de l'air frais, jusqu'à ce que la température de l'espace de réfrigération (1) se situe dans la plage de réfrigération ou près de celle-ci.
  4. Procédé de réfrigération sans formation de givre selon la revendication 1, caractérisé en ce que l'air frais amené est traité préalablement, c'est-à-dire par exemple refroidi, filtré et/ou humidifié et/ou doté d'un conservateur.
  5. Dispositif de réfrigération sans formation de givre pour lequel une plage de réfrigération est prévue pour l'amenée de froid, dans lequel l'espace de réfrigération (1) est sollicité par du froid à partir de convecteurs (2), et de l'air frais à une température supérieure est amené vers l'espace de réfrigération (1) par l'intermédiaire d'un ventilateur (9) pourvu d'un réglage de température (10), un canal d'air frais (6) et au moins un canal d'air sortant (7) étant prévus en liaison avec l'espace de réfrigération (1), caractérisé en ce qu'il est prévu, dans le canal d'air sortant (7), un échangeur de chaleur (3) du condensateur (4) de la machine frigorifique (5), et en ce que l'évaporateur (27) est séparé dans l'espace de l'espace de réfrigération (1) au moins par les convecteurs (2).
  6. Dispositif de réfrigération sans formation de givre selon la revendication 5, caractérisé en ce qu'il est prévu un autre canal d'air amené (11) pour l'air froid et un autre ventilateur (12) pour l'air froid, avec un réglage de température (13).
  7. Dispositif de réfrigération sans formation de givre selon la revendication 5, caractérisé en ce qu'il est prévu une soupape d'inversion (14) pour passer de l'air frais à l'air froid.
  8. Dispositif de réfrigération sans formation de givre selon la revendication 5, caractérisé en ce que les surfaces des convecteurs (2) tournées vers l'espace de réfrigération (1) sont très bonnes conductrices de chaleur, et des couches moins bonnes conductrices (16) sont disposées sous les convecteurs (2).
  9. Dispositif de réfrigération sans formation de givre selon la revendication 5, caractérisé en ce que les surfaces des convecteurs (2) tournées vers l'espace de réfrigération (1) sont pourvues de nervures de réfrigération (17) ou d'autres formes agrandissant les surfaces.
  10. Dispositif de réfrigération sans formation de givre selon la revendication 8, caractérisé en ce qu'une partie au moins des parois de l'espace de réfrigération (1) est conçue sous la forme de convecteurs (26).
  11. Dispositif de réfrigération sans formation de givre selon la revendication 8, caractérisé en ce que les convecteurs (2) et/ou l'évaporateur (27) sont conçus comme des réservoirs de froid (19).
  12. Dispositif de réfrigération sans formation de givre selon la revendication 11, caractérisé en ce que les réservoirs de froid (19) sont remplis de liquide (20) formant un réservoir de froid latent.
  13. Dispositif de réfrigération sans formation de givre selon l'une au moins des revendications 5 à 12 précédentes, caractérisé en ce qu'il est prévu, dans l'espace de réfrigération (1), un récipient intérieur (21) destiné à recevoir les produits réfrigérés, et les canaux d'air frais (6) sont disposés de telle sorte que l'air frais entre au moins partiellement dans l'espace (22) défini entre la surface intérieure (15) de l'espace de réfrigération (1) et le récipient intérieur (21).
  14. Dispositif de réfrigération sans formation de givre selon l'une au moins des revendications 5 à 13 précédentes, caractérisé en ce que l'espace de réfrigération (1) est conçu comme un tiroir (28) dans un congélateur armoire (25), les parois servant à la transmission du froid et le froid dudit congélateur armoire (25) arrivant à travers elles dans l'espace de réfrigération (1).
  15. Dispositif de réfrigération sans formation de givre selon la revendication 14, caractérisé en ce que les canaux d'air frais (6) et les canaux d'air sortant (7) sont conçus comme de fins tuyaux plats qui sont amenés à l'extérieur à travers l'interstice de la porte du congélateur armoire (25).
  16. Dispositif de réfrigération sans formation de givre selon la revendication 14, caractérisé en ce que le ventilateur (12) et le réglage de température (13) sont disposés au niveau du tiroir (28).
  17. Dispositif de réfrigération sans formation de givre selon la revendication 16, caractérisé en ce que le ventilateur (12) et le réglage de température (13) sont disposés à l'intérieur du tiroir (28), dans la plage de température supérieure à 0°C.
  18. Dispositif de réfrigération sans formation de givre selon l'une au moins des revendications 5 à 17 précédentes, caractérisé en ce qu'il est prévu, dans la zone du canal d'air frais (6) et/ou du canal d'air sortant (7), une soupape d'étranglement (18) réglable à la main.
  19. Dispositif de réfrigération sans formation de givre selon l'une au moins des revendications 8 à 18 précédentes, caractérisé en ce qu'il est prévu, dans la couche moins bonne conductrice (16), une soupape d'étranglement (18) réglable à la main pour modifier le transfert de chaleur.
  20. Dispositif de réfrigération sans formation de givre selon l'une au moins des revendications 5 à 19 précédentes, caractérisé en ce qu'il est prévu une minuterie de contact (33) qui ne met en marche la machine frigorifique (5) qu'à des heures définies.
EP89905086A 1988-04-27 1989-04-27 PROCEDE DE REFRIGERATION-CONSERVATION A DES TEMPERATURES SUPERIEURES A 0oC Expired - Lifetime EP0365650B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3814238 1988-04-27
DE3814238A DE3814238A1 (de) 1988-04-27 1988-04-27 Nofrost-kuehlverfahren fuer einen kuehlbereich ueber 0(grad) c
PCT/EP1989/000464 WO1989010523A1 (fr) 1988-04-27 1989-04-27 Procede de refrigeration-conservation a des temperatures superieures a 0°c
CA000600217A CA1332876C (fr) 1988-04-27 1989-05-19 Refrigerateur sans givre fonctionnant a des temperatures au-dessus du point de congelation

Publications (2)

Publication Number Publication Date
EP0365650A1 EP0365650A1 (fr) 1990-05-02
EP0365650B1 true EP0365650B1 (fr) 1995-09-20

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ID=25672742

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Application Number Title Priority Date Filing Date
EP89905086A Expired - Lifetime EP0365650B1 (fr) 1988-04-27 1989-04-27 PROCEDE DE REFRIGERATION-CONSERVATION A DES TEMPERATURES SUPERIEURES A 0oC

Country Status (8)

Country Link
US (1) US5040378A (fr)
EP (1) EP0365650B1 (fr)
JP (1) JPH03500570A (fr)
AT (1) ATE128223T1 (fr)
AU (1) AU623890B2 (fr)
CA (1) CA1332876C (fr)
DE (2) DE3814238A1 (fr)
WO (1) WO1989010523A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505455C2 (sv) * 1993-12-22 1997-09-01 Ericsson Telefon Ab L M Kylsystem för luft med två parallella kylkretsar
CN102098902A (zh) * 2009-12-11 2011-06-15 华为技术有限公司 散热设备、通信设备的散热方法及通信设备
CN115468362A (zh) * 2022-10-25 2022-12-13 珠海格力电器股份有限公司 换气结构、设备、控制方法及计算机可读存储介质

Citations (1)

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Publication number Priority date Publication date Assignee Title
US2161421A (en) * 1934-12-29 1939-06-06 Gen Motors Corp Refrigerating apparatus

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US2048137A (en) * 1936-07-21 Refrigeration method and apparatus
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US1897205A (en) * 1931-08-03 1933-02-14 Grigsby Grunow Co Refrigeration apparatus
US1980109A (en) * 1932-04-01 1934-11-06 Harold A Stockly Air conditioning system
US2053453A (en) * 1932-09-06 1936-09-08 Wendler Eugene Refrigerator ventilating device
US2049708A (en) * 1932-12-14 1936-08-04 Bosch Robert Refrigerator
US2224878A (en) * 1935-05-20 1940-12-17 Willard L Morrison Air cooling and circulating device
US2059016A (en) * 1935-06-11 1936-10-27 Gen Electric Refrigerator
US2042384A (en) * 1935-08-15 1936-05-26 Phipps & Bird Inc Constant temperature refrigerator
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DE1120476B (de) * 1960-02-22 1961-12-28 Ida Dilger Kuehlmoebel, insbesondere Haushaltkuehlschrank
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DE3111863C2 (de) * 1981-03-26 1984-05-10 Kunststoff- und Kältetechnik Großkopf GmbH, 4300 Essen Kältespeicherelement
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US2161421A (en) * 1934-12-29 1939-06-06 Gen Motors Corp Refrigerating apparatus

Also Published As

Publication number Publication date
AU623890B2 (en) 1992-05-28
ATE128223T1 (de) 1995-10-15
AU3548489A (en) 1989-11-24
US5040378A (en) 1991-08-20
DE3814238A1 (de) 1989-11-09
DE58909445D1 (de) 1995-10-26
EP0365650A1 (fr) 1990-05-02
JPH03500570A (ja) 1991-02-07
CA1332876C (fr) 1994-11-08
WO1989010523A1 (fr) 1989-11-02
DE3814238C2 (fr) 1991-07-04

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