EP2751504B1 - Kühlelement für einen kühlschrank - Google Patents

Kühlelement für einen kühlschrank Download PDF

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Publication number
EP2751504B1
EP2751504B1 EP13777943.5A EP13777943A EP2751504B1 EP 2751504 B1 EP2751504 B1 EP 2751504B1 EP 13777943 A EP13777943 A EP 13777943A EP 2751504 B1 EP2751504 B1 EP 2751504B1
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EP
European Patent Office
Prior art keywords
case
pcm
evaporator plate
flexible
refrigeration system
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.)
Not-in-force
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EP13777943.5A
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English (en)
French (fr)
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EP2751504A1 (de
EP2751504A4 (de
Inventor
Kumar JAIN NAVEEN
Kumar SHARMA BRIJESH
Amit GAMBHIR
Gaurav Gupta
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LG Electronics Inc
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LG Electronics Inc
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Publication date
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Publication of EP2751504A1 publication Critical patent/EP2751504A1/de
Publication of EP2751504A4 publication Critical patent/EP2751504A4/de
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Publication of EP2751504B1 publication Critical patent/EP2751504B1/de
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    • 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
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • 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
    • F25D11/006—Self-contained movable devices, e.g. domestic refrigerators with cold storage accumulators
    • 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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • 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
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies

Definitions

  • the present invention relates to a direct cool refrigeration system having a cooling element containing phase change material.
  • the basic principle of an AC powered refrigerator is that it consists of a thermally insulated compartment and a compressor(mechanical, electronic, or chemical) which transfers heat from inside of the refrigerator to its external environment so that the inside of the refrigerator is cooled to a temperature below the ambient temperature of the room. Cooling is a popular food storage technique worldwide and works by decreasing the reproduction rate of bacteria. Bacteria are majorly responsible for food spoilage, so the refrigerator helps reduce the rate of spoilage of foodstuffs.
  • phase change materials PCM
  • LHS latent heat storage
  • phase change materials Several types can be used like eutectic mixtures, organic PCMs, inorganic PCMs, etc.
  • the cooling of the evaporator is used to freeze the phase change material when the power supply is available.
  • the refrigeration cycle stops and the evaporator plate does not have any source of cooling.
  • the temperature inside the refrigerator begins to rise.
  • the rate of temperature rise is greatly reduced.
  • the cooling potential of the PCM is used to cool the air inside the refrigerator and keep the stored items at a sufficiently low temperature.
  • a generally acceptable temperature is 0°C for freezer section and 10°C for refrigerator section. If the temperature rises above these temperatures for long periods of time, the stored items may get spoiled.
  • the existing methods suffer from one or more problems. For instance, if the freezing point of the PCM is too low, it can't be completely frozen. If the freezing point of the PCM is too high, the PCM gets completely frozen but has very low cooling potential in terms of latent heat. Thus, it is imperative to use PCM with freezing point in the correct range of temperature, depending upon the average plate temperature of the evaporator.
  • the storage elements can be used in such a manner that the eutectic solution becomes frozen by practically continuous operation of the compressor during those (night) hours in which the mains electricity is sold at reduced tariff.
  • the thermal energy stored by these elements is, then utilized during those (day) hours in which the mains electricity is sold at full tariff, so avoiding operation of the freezer compressor during these hours.
  • the compressor has to be run continuously to freeze the PCM.
  • the cold storage elements have to be fitted into each other by inosculation, the casing has to be thick and rigid leading to high thermal resistance.
  • a prior art direct cool refrigeration system is known from US 4 748 823 A , comprising a refrigerator compartment and a freezer compartment.
  • the freezer compartment comprises an evaporator plate in contact with a plurality of cooling coils.
  • the freezer compartment further comprises a plurality of cooling elements provided inside the evaporator plate and a supporter case disposed inside the evaporator plate and arranged to support the plurality of cooling elements.
  • the cooling elements are in contact with the evaporator plate and comprise flexible bags containing a phase change material.
  • the present invention provides a direct cool refrigeration system having a cooling element containing PCM having freezing point within a desired range of temperatures, to ensure complete freezing of the PCM during normal operation.
  • the cooling element is designed such that there is high contact area and low thermal resistance between the PCM and the evaporator plate.
  • This cooling element containing a suitable PCM allows for maximum heat transfer between evaporator and cooling retention media through use of a flexible PCM case.
  • sufficiently low temperatures are maintained for extended periods of time within the compartments of the refrigerator in the event of power failure or high power consumption or low voltage.
  • the cooling element may also reduce the amount of PCM required.
  • the operating cost of the refrigerator can also be reduced because of efficient utilization of the cooling supplied by the refrigerator during normal operation.
  • a direct cool refrigeration system comprising a refrigerator compartment and a freezer compartment; the freezer compartment comprising an evaporator plate in contact with a plurality of coils or tubes with refrigerant circulating therewithin; characterized in that, a plurality of cooling elements are provided inside the refrigerator, at least one of the cooling elements being in contact with the evaporator plate, the cooling element comprising a phase change material (PCM) having freezing point lower than 0°C and higher than the average evaporator plate temperature, enclosed in a flexible case.
  • PCM phase change material
  • the flexible case comprises at least a pair of thin, flexible and spaced apart walls joined together to form a closed surface.
  • the flexible walls are adapted to match the shape of the evaporator plate such that there is an enhancement in the area of the flexible case in contact with the evaporator plate.
  • a direct cool refrigeration system wherein the flexible walls are thin.
  • the direct cool refrigeration system further comprises a tray fresh room or TFR with another cooling element placed therewithin; the cooling element comprising a phase change material having freezing point higher than the minimum attainable temperature inside the TFR, enclosed in a rigid, semi-rigid or flexible case.
  • the rigid case comprises at least a pair of rigid and spaced apart walls joined together to form a closed surface.
  • the direct cool refrigeration system comprises a supporter case disposed inside the evaporator plate and in contact with at least one wall of the flexible case.
  • the cooling elements are divided into three compartments.
  • the evaporator plate is a metallic sheet.
  • the supporter case has three (U-shaped), four (O-shaped) or more faces placed in proximity with and spaced apart from the sides/faces of the evaporator plate.
  • the supporter case has three faces (U-shaped) and the cooling element is in contact with one or more faces of the supporter case.
  • the phase change material(s) in the cooling element(s) gets partially or completely frozen during normal operation of the refrigeration system, and provides cooling during power failure/outage.
  • the phase change material is any organic or inorganic PCM or eutectics having freezing point in the given range of temperatures.
  • the flexible case is composed of plastic materials like Poly Vinyl Chloride (PVC), Polypropylene, Polyethylene, Polystyrene, Acrylonitrile Butadiene Styrene (ABS), Nylon and the like.
  • PVC Poly Vinyl Chloride
  • ABS Acrylonitrile Butadiene Styrene
  • x°C PCM means "a Phase Change Material (PCM) having a freezing/melting point of x°C", where "x" is a real number.
  • PCMs are available having freezing points in the temperature range of -5°C to 190°C.
  • the PCMs useful for domestic refrigerators generally have freezing points below 0°C.
  • the effectiveness of PCMs can be judged on the basis of the thermodynamic, kinetic, economic and chemical properties. An important prerequisite is that the melting temperature should lie within the operating range of the refrigerator. Two important factors to judge the effectiveness of the PCM in refrigerators are time taken to completely freeze the PCM and the amount of sensible and latent heat stored during phase transformation.
  • Fig. 1(a) is a front view of a domestic natural convection or single door or direct cool refrigeration system (100) in accordance with an embodiment of the invention.
  • the freezer compartment (102) is located at the top of the refrigerator. The temperature inside this compartment is maintained at a few degrees below the freezing point of water so as to form ice and provide cold storage for other items.
  • the tray fresh room or TFR (103) is disposed just below the freezer compartment. The temperature in this compartment is usually close to the freezing point of water. Thus, items that need to be chilled/cooled to a low temperature but preferably not frozen are stored in this section.
  • the main refrigerator compartment (101) is provided with a number of trays for placement of food and other items. The temperature in this section is kept a few degrees lower than the ambient temperature.
  • the bottom part of the refrigerator may have a crisper tray (105) for storing and maintaining the freshness of fruits and vegetables.
  • Fig. 1(b) is a perspective view of the freezer compartment (102) and TFR (103) shown in Fig. 1(a) .
  • the freezer contains the evaporator plate (106) which supplies cooling throughout the refrigerator and the frame of the evaporator (107) which holds the thermostat, bulb and the freezer door.
  • the supporter case (108) for holding the flexible plastic case is disposed inside the freezer compartment (102).
  • the PCM is stored in the flexible plastic case disposed in the space between the evaporator plate and the supporter case.
  • the supporter case (108) therefore prevents the flexible plastic case containing PCM from accidental damage. It also prevents sagging or bulging of the flexible plastic case under its own weight, which could happen when a large amount of PCM is stored therewithin.
  • a different PCM or the same PCM is placed inside the TFR (103).
  • the PCM placed inside TFR may be stored in a flexible plastic case or a rigid plastic case.
  • Fig. 2(a) is a perspective view illustrating the attachment of the flexible plastic case (110) over the supporter case (108).
  • the PCM is stored inside the flexible plastic case.
  • the supporter case has three faces bent into a U-shape. Two of the faces are parallel to each other and perpendicular to the third face. In order to prevent bending of the supporter case, a strip (117) is provided between the two parallel faces. Thus, the items to be kept inside the freezer are enclosed by the supporter case.
  • the supporter case (108) has attachment means in the form of a plurality of projections (111) mounted on it or molded into it to enable the flexible plastic case to be press-fitted or attached onto it.
  • Fig. 2(b) is a view of the flexible plastic case (110) having three compartments for storing the PCM in accordance with an embodiment of the invention.
  • the compartments have a small gap between them to accommodate the edges of the supporter case (108) when placed thereupon. These three faces compliment the corresponding surfaces of the supporter case (108) on which they are placed.
  • a plurality of through holes (112) are also present to allow the projections (111) of the supporter case to tightly fit or attach with them.
  • Fig. 2(c) is an exploded view of the TFR (103) of Fig. 1(b) .
  • the PCM can be stored in a rigid, semi-rigid or flexible case inside the TFR. It is stored in a rigid plastic case (109) in the present embodiment. The case is divided into a plurality of compartments so as to promote faster freezing of the PCM.
  • the rigid plastic case (109) is placed inside the TFR (103) and may be detached or removed whenever required. This serves as an additional source of cooling during power failure, and also helps arrest the rise in temperature of the refrigerator compartment (101).
  • Fig. 3 is a temperature vs. time graph for freezing of two PCMs having freezing points of -12°C and - 5°C.
  • the liquid PCMs at ambient temperature (roughly 30°C) are attached to the evaporator plate and the compressor is run continuously. Due to continuous operation of the compressor, the evaporator plate temperature goes to lower than -30°C.
  • the PCMs get frozen at different times and are further cooled in solid phase to roughly -30°C.
  • the graph clearly indicates that the PCM having the lower freezing point shows the longer completion time for phase change.
  • the -12°C PCM looses more heat before getting frozen than the -5°C PCM.
  • Fig. 4 is a temperature vs. time graph for freezing a PCM having freezing point of -12°C by cycling operation in a direct cool refrigerator. Cycling is the common mode of operating direct cool refrigerators, wherein the compressor is cycled on and off such that the evaporator plate temperature keeps increasing and decreasing between certain preset temperatures. The same is illustrated by the notches in the evaporator plate temperature graph.
  • PCM When the PCM is attached at the evaporator of direct cooling type refrigerator, PCM is frozen by giving up heat to the evaporator plate.
  • the evaporator plate on the other hand is cooled by releasing heat to the refrigerant flowing through a plurality of tubes or coils attached to the evaporator plate.
  • the refrigerant enters the tubes at a lower temperature but exits at a higher temperature because it takes up heat from the evaporator plate.
  • the average temperature of evaporator plate is -13°C.
  • the graph showing the temperature of the PCM shows that the temperature varies within a narrow range of temperatures. It is observed that the PCM having freezing point of -12°C cannot be completely frozen when the evaporator plate average temperature is -13°C. Therefore the melting point of PCM attached to the evaporator should be ⁇ -12°C. In case of normal notch cycling of direct cool type refrigerator, the average temperature of TFR is -1.5°C. Therefore the melting point of PCM placed in TFR should be ⁇ -1°C. Thus, the PCMs having melting points between -12°C to 0°C are effective in the freezer compartment and PCMs having freezing point higher than -1°C are particularly effective in the TFR of this particular direct cool refrigerator.
  • Fig. 5(a) is a perspective view of an evaporator plate (106).
  • the evaporator plate is essentially a metallic sheet bent into a suitable shape having a plurality of tubes or coils (113) attached to its surface. In the given example, it has a network of tubes on four faces. The refrigerant enters the tubes at one end and exits from another end, picking up heat in the process.
  • a rigid plastic case (116) is placed in contact with one of the faces of the evaporator plate (106)
  • Fig. 5(b) is a view of a section along the line AA' of Fig. 5(a) showing a part of the evaporator plate, rigid plastic case, PCM and the freezer compartment.
  • the evaporator plate section (115) has a few of the tubes (113) passing through it. The refrigerant flows through these tubes and picks up heat from the evaporator plate, thereby lowering its temperature.
  • the cooled evaporator plate acts as the source of cooling inside the freezer. Thus, the air inside the freezer loses heat to or gets cooled by the evaporator plate.
  • the rigid plastic case (116) containing PCM placed adjacent to the evaporator plate section (115) can be seen as a pair of parallel walls (104 and 114) with a PCM (120) placed therewithin.
  • the wall (104) is adjacent to the evaporator plate section (115) and has several air gaps due to the wall being inflexible.
  • the second wall (114) may be in contact with the supporter case or in direct contact with the air inside the freezer.
  • Fig. 5(c) is a magnified view showing the encircled portion of Fig. 5(b) .
  • the arrows in the given figure show the direction of flow of heat.
  • Q 1 represents the flow of heat from the interior of the freezer to the PCM (120).
  • Q 2 represents the flow of heat from the PCM (120) to the evaporator plate section (115).
  • the flow of heat is from the interior of the freezer towards the evaporator plate.
  • the thermal resistance to heat transfer offered by the supporter case has also not been considered because it may or may not be provided. Minor positional variations in the temperature of the evaporator plate may also be neglected.
  • the term "Cabinet” used hereinafter refers to the interior of the freezer. We assume the cabinet to be empty, i.e. no food or other articles are placed therewithin.
  • the cabinet temperature remains constant throughout the duration of the phase transformation of the PCM.
  • the temperature of the PCM is assumed to be its freezing point because there are very minor variations in temperature during phase transformation, as seen from Fig. 3 .
  • T F and T PCM represent average temperatures inside the freezer and the PCM respectively.
  • Fig. 6(a) is a magnified sectional view showing a part of the evaporator plate (115), rigid plastic case (116) and the PCM (120).
  • Q 2 represents the flow of heat from the PCM to the evaporator plate.
  • the thicknesses and thermal conductivities of the evaporator plate, air, rigid plastic case and PCM have been labeled in the figure. Several thermal resistances are encountered during transfer of heat from the PCM to the evaporator plate.
  • Fig. 6(b) is a schematic diagram showing the thermal resistances offered by the components of Fig. 6(a) .
  • the resistance term R 1 represents the total thermal resistance to heat transfer through the area A 1 not in contact with the rigid plastic case. It includes the thermal resistance of the area A 1 of the evaporator plate, the thermal resistance of the air between the evaporator plate and rigid plastic case, and the thermal resistance offered by the corresponding area of the rigid plastic case which is not in contact with the area A 1 of evaporator.
  • the resistance term R 2 represents the total thermal resistance to heat transfer through the area A 2 of the evaporator plate in contact with the rigid plastic case. It includes the thermal resistance of the area A 2 of the evaporator plate, the thermal resistance offered by an area A 2 of the rigid plastic case which is in contact with the evaporator and the thermal contact resistance between the evaporator plate and the rigid plastic case.
  • the thermal contact resistance R C is much smaller in comparison to the other two terms involved in calculating R 2 . Hence, it has been neglected in further calculations.
  • the resistance term R 3 represents the thermal resistance to heat transfer through the PCM based on the width of the PCM enclosed inside the layers of rigid plastic.
  • Fig. 6(c) is a schematic diagram showing the relationship between the thermal resistances of Fig. 6(b) .
  • the resistances R 1 and R 2 are in parallel with each other and their combination is in series with R 3 . It is clear from the expression obtained that the thermal resistance will increase with increasing width of the PCM. For a given heat transfer area, reducing the amount of PCM used will reduce the width of the PCM enclosed in the layers of rigid plastic, thereby reducing the thermal resistance to heat transfer.
  • Example 1 An experiment was conducted for a direct cool refrigerator having a steel evaporator plate. A PCM having a thermal conductivity of 0.5W/mK was used. A o has been assumed to be equal to A i , but in actual practice it should be slightly higher.
  • Fig. 8(a) is a schematic diagram showing a rigid plastic case in (116) contact with the evaporator plate. The areas of the evaporator plate in contact with the rigid plastic case are labeled as A 2 . For a rigid plastic case, it would be reasonable to assume an area ratio (A 2 /A i ) of 0.5, which means only half of the area of the rigid plastic case will be in direct physical contact with the evaporator plate. In practice, the area ratio is lower than 0.5 for a rigid plastic case because of the tubes or coils being spaced apart.
  • the parameters related with Q 1 affect both Latent heat Storage (LHS) and the blackout performance, i.e. the performance during power failure. Since the evaporator doesn't have any source of cooling during power failure, it only exchanges a small amount of heat with the surroundings upon power failure. This is much less in comparison with the latent heat taken up by the PCM before melting and can be neglected. Thus, during power failure, the heat transfer from the freezer cabinet to the PCM plays a major role and hence the rate of absorption of heat from inside the freezer (Q 1 ) is the major contributor to blackout performance of the refrigerator.
  • the parameters related to Q 1 are h i , t rp , k rp , and A o .
  • the thickness of the plastic case is a very important property which the designer can control.
  • Use of a rigid plastic limits the reduction in thickness of the case.
  • a flexible plastic like PVC is used, the thickness can be reduced to a great extent.
  • the thickness of the flexible plastic case is almost 90% less than the rigid plastic case and its flexibility increases the contact area.
  • Example 2 The rigid plastic case in Example 1 was replaced with a flexible plastic case.
  • the conductivity of the rigid and flexible plastic can be assumed to be the same.
  • the thickness of the case is reduced by 90% by virtue of using flexible plastic. Due to reduced thickness and increased flexibility of the case the area of contact between the evaporator plate and said case increases.
  • Fig. 9 is a temperature vs. time graph for freezing of the same PCM in a flexible plastic case and a rigid plastic case. It can be seen that the freezing point is reached much faster in the flexible plastic case. The completion time for phase change is also much less in case of the flexible plastic case. At every time instance, the temperature in the flexible plastic case is lower than the rigid plastic case, owing to the better heat transfer. Thus, for the same amount of PCM, freezing time is reduced by almost two-thirds by using the flexible plastic case.
  • the present invention provides a direct cool refrigerator with one or more cooling elements comprising Phase Change Materials of a particularly suitable freezing point, enclosed in a flexible or rigid plastic case provided at one or more locations inside the refrigerator.
  • the refrigerator provides good blackout performance and at the same time ensures fast freezing of the PCM housed therewithin.
  • the PCM in the TFR may also be provided inside a flexible plastic case.
  • the flexible and rigid plastic cases may have any suitable number of compartments.
  • PCM may additionally be provided in other locations inside the refrigerator if required.
  • the supporter case may or may not be present.
  • the terms "flexible plastic” and "rigid plastic” are not limited to plastics but any material possessing properties similar to flexible and rigid plastics.
  • Some suitable flexible plastics include Poly Vinyl Chloride (PVC), Polypropylene, Polyethylene, Polystyrene, Acrylonitrile Butadiene Styrene (ABS), Nylon etc.
  • the shapes of the various components may also be modified as required.
  • the evaporator plate is L-shaped instead of a hollow cuboid
  • the PCM case should also be provided in a similar shape proximate to one or more faces where the evaporator plate is present. This is because if the PCM was disposed at other faces inside the freezer where the evaporator plate doesn't come in direct contact with the PCM, it would make it difficult to completely freeze the PCM.
  • the configuration of the supporter case is also decided on the basis of the shape of the evaporator plate and/or PCM case. For instance, if the evaporator plate is U-shaped i.e. any one of the faces from the evaporator plate (106) of Fig. 5(a) is removed, the supporter case may also have three similar faces and the PCM can be provided in contact with one or more faces of the evaporator plate.

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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 (12)

  1. Direktes Kühlsystem (100) mit
    einem Kühlfach (101) und einem Gefrierfach (102), wobei das Gefrierfach (102) eine Verdampferplatte (106) umfasst, die mit einer Vielzahl von Spulen oder Rohren (113) in Kontakt steht, in denen Kältemittel zirkuliert;
    wobei das Gefrierfach (102) ferner umfasst
    eine Vielzahl von Kühlelementen, die innerhalb der Verdampferplatte (106) vorgesehen sind, wobei mindestens eines der Kühlelemente in Kontakt mit der Verdampferplatte (106) ist, wobei die Vielzahl von Kühlelementen ein Phasenwechselmaterial (PCM) mit einem Gefrierpunkt unter 0°C und über der durchschnittlichen Verdampferplattentemperatur umfasst, das in einem flexiblen Kunststoffgehäuse (110) eingeschlossen ist, und
    ein Trägergehäuse (108), das innerhalb der Verdampferplatte (106) und so angeordnet ist, dass es die Vielzahl von Kühlelementen trägt;
    wobei das Trägergehäuse (108) mit mindestens einer Wand des flexiblen Gehäuses (110) in Kontakt ist und Mittel zum Eingriff mit dem flexiblen Gehäuse (110) aufweist,
    dadurch gekennzeichnet, dass das flexible Gehäuse (110) drei Fächer aufweist, die so angeordnet sind, dass sie zu einer U-Form gebogen werden, sodass zwei Fächer parallel zueinander und senkrecht zum dritten Fach sind, wobei die Fächer einen Spalt zwischen ihnen aufweisen, um Kanten des Trägergehäuses (108) aufzunehmen,
    wobei das Mittel zum Eingriff mit dem flexiblen Gehäuse (110) eine Vielzahl von Vorsprüngen (111) am Trägergehäuse (108) und eine Vielzahl von Durchgangslöchern (112) im dritten Fach des flexiblen Gehäuses (110) aufweist, um der Vielzahl von Vorsprüngen (111) des Trägergehäuses (108) einen festen Sitz mit der Vielzahl von Durchgangslöchern (112) oder eine Befestigung mit der Vielzahl von Durchgangslöchern (112) zu ermöglichen.
  2. Direktes Kühlsystem nach Anspruch 1, wobei das flexible Kunststoffgehäuse (110) mindestens ein Paar von dünnen, flexiblen und beabstandeten Wänden aufweist, die miteinander verbunden sind, um eine geschlossene Oberfläche zu bilden.
  3. Direktes Kühlsystem nach Anspruch 2, wobei die flexiblen Wände an die Form der Verdampferplatte (106) angepasst sind, sodass eine Verstärkung im Bereich des flexiblen Gehäuses (110) in Kontakt mit der Verdampferplatte (106) vorhanden ist.
  4. Direktes Kühlsystem nach Anspruch 3, wobei die flexiblen Wände dünn sind.
  5. Direktes Kühlsystem nach einem der vorhergehenden Ansprüche, ferner umfassend ein Frischraumschubfach (Tray Fresh Room oder TFR) (103) mit einem anderen Kühlelement, das darin angeordnet ist;
    wobei das Kühlelement ein Phasenwechselmaterial mit einem Gefrierpunkt umfasst, der höher als die minimal erreichbare Temperatur innerhalb des TFR ist und in einem starren, halbstarren oder flexiblen Gehäuse eingeschlossen ist.
  6. Direktes Kühlsystem nach Anspruch 5, wobei das starre Gehäuse mindestens ein Paar von starren und beabstandeten Wänden aufweist, die miteinander verbunden sind, um eine geschlossene Oberfläche zu bilden.
  7. Direktes Kühlsystem nach einem der vorhergehenden Ansprüche, wobei die Verdampferplatte ein Metallblech ist.
  8. Direktes Kühlsystem nach Anspruch 1 oder 7, wobei das Trägergehäuse drei (U-förmige), vier (O-förmige) oder mehr Flächen aufweist, die in der Nähe der und beabstandet von den Seiten/Flächen der Verdampferplatte angeordnet sind.
  9. Direktes Kühlsystem nach Anspruch 8, wobei das Trägergehäuse drei Seiten (U-förmig) aufweist und das Kühlelement mit einer oder mehreren Seiten des Trägergehäuses in Kontakt steht.
  10. Direktes Kühlsystem nach einem der vorhergehenden Ansprüche, wobei das/die Phasenwechselmaterial(ien) in dem/den Kühlelement(en) während des normalen Betriebs des Kühlsystems teilweise oder vollständig eingefroren wird/werden und bei Stromausfall für Kühlung sorgt/sorgen.
  11. Direktes Kühlsystem nach einem der vorhergehenden Ansprüche, wobei das Phasenwechselmaterial ein beliebiges organisches oder anorganisches PCM oder Eutektikum mit einem Gefrierpunkt im vorgegebenen Temperaturbereich ist.
  12. Direktes Kühlsystem nach einem der vorhergehenden Ansprüche, wobei das flexible Gehäuse aus Kunststoffmaterialien wie Polyvinylchlorid (PVC), Polypropylen, Polyethylen, Polystyrol, AcrylnitrilButadien-Styrol (ABS), Nylon und dergleichen besteht.
EP13777943.5A 2012-04-16 2013-04-15 Kühlelement für einen kühlschrank Not-in-force EP2751504B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1169DE2012 2012-04-16
PCT/IB2013/000693 WO2013156839A1 (en) 2012-04-16 2013-04-15 Cooling element for refrigerator

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EP2751504A1 EP2751504A1 (de) 2014-07-09
EP2751504A4 EP2751504A4 (de) 2015-06-03
EP2751504B1 true EP2751504B1 (de) 2018-09-12

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KR (1) KR101573592B1 (de)
CN (1) CN103890508B (de)
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KR101668916B1 (ko) * 2014-07-11 2016-10-24 엘지전자 주식회사 냉장고
DE102017101011A1 (de) 2017-01-19 2018-07-19 Hupfer Metallwerke Gmbh & Co. Kg Lebensmittelausgabeeinrichtung sowie Verfahren zum Betrieb einer Lebensmittelausgabeeinrichtung
CN111578593A (zh) * 2020-05-20 2020-08-25 长虹美菱股份有限公司 一种冰箱的恒温装置

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JPS623659Y2 (de) * 1981-01-19 1987-01-27
US4748823A (en) * 1984-12-07 1988-06-07 Nippondenso Co., Ltd. Automotive refrigerator
ITMI981693A1 (it) * 1998-07-22 2000-01-22 Whirlpool Co Frigorifero con evaporatore posto nel cielo del vano di conservazione
CN1236260C (zh) * 2001-07-15 2006-01-11 海尔集团公司 电冰箱
KR20040081288A (ko) * 2003-03-14 2004-09-21 주식회사 유일파워텍 축냉식 이동형 냉장고
CN100338167C (zh) * 2005-12-09 2007-09-19 刘益才 电冰箱组合蓄冷剂
EP1939554B1 (de) * 2006-12-28 2009-08-19 CANDY S.p.A. Behälter mit eutektischen Platten und Kühlschrank mit einem solchen Behälter
ITMI20071259A1 (it) * 2007-06-22 2008-12-23 High Technology Partecipation Frigorifero per prodotti freschi con mezzi passivi per uniformare la temperatura senza ventilazione e mantenere prestazioni termiche ed umidita' relativa elevata anche in assenza di rete elettrica.
KR101071968B1 (ko) * 2009-07-17 2011-10-11 금오공과대학교 산학협력단 상변화물질을 이용한 에너지 저감 냉장고
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KR101697113B1 (ko) * 2010-09-06 2017-01-18 삼성전자주식회사 냉장고
KR101923439B1 (ko) * 2011-12-21 2018-11-29 엘지전자 주식회사 냉장고

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Publication number Publication date
EP2751504A1 (de) 2014-07-09
EP2751504A4 (de) 2015-06-03
KR101573592B1 (ko) 2015-12-11
WO2013156839A1 (en) 2013-10-24
CN103890508A (zh) 2014-06-25
CN103890508B (zh) 2016-03-16
KR20140015590A (ko) 2014-02-06

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