JP2007530902A - Cooling panel for refrigerator or freezer - Google Patents

Abstract

  The present invention comprises a roll bond type circuit composed of a refrigerant liquid circulation pipe having a low part and an ascending part, and at least a part of the low part pipe of the circuit accumulates the refrigerant liquid in the liquid state with the maximum height hi. The total height of the accumulation area is adjusted so that the total volume of the accumulation area is more than half of the total volume of the refrigerant liquid, and each height hi is less than 70% of the total height Hi of the pipe. The purpose is a vertical evaporating panel for cooling a refrigerator or freezer. The panel according to the invention can improve the thermal efficiency of the refrigerator or freezer and reduce the level of sound.

Description

  The present invention relates to a “roll bond” type cooling panel for a refrigerator or freezer that can improve the thermal efficiency of the cooling circuit and reduce the noise level during operation.

  In the case of a refrigerator having a freezer compartment, a compressor for propelling a refrigerant liquid, for example a fluorinated hydrocarbon or a chlorofluorohydrocarbon or an alkane, and a refrigerator having a freezing compartment, the cooling circuit of the refrigerator or freezer With an evaporator in the form of a generally vertical panel supplemented by a panel having

  One method of manufacturing an evaporating panel is to prevent the joining between two sheets by so-called "roll bond" technology, ie from two sheets of aluminum or aluminum alloy to the area where one circuit will be Manufacturing a cooling circuit by the technique of applying ink for the purpose. Subsequently, the two thin plates are joined by roll bonding. Next, the unbonded area is expanded by hydraulic or gas means to form a double-sided type in which both sides are deformed or a single surface having a flat surface and a deformed surface, that is, an OSF (one side flat) type circuit.

  The cooling circuit usually has a part that descends towards the bottom of the panel and a part that rises towards the top of the panel, and in some cases finishes evaporation at the end of the circuit regardless of external conditions It comprises a series of pipes with an enlarged area that acts as a boiler. When the compressor stops, when there is no solenoid valve and the high pressure area cannot be separated from the low pressure area, the high pressure in the cooler pushes the refrigerant liquid toward the low pressure area that the evaporator constitutes, so the refrigerant liquid Moves from the cooler to the evaporator. The movement of the refrigerant liquid takes place in the form of a liquid / gas two-phase, where the liquid part descends by gravity to the lowest point of the cooling circuit where it accumulates.

  When the compressor is restarted, especially when there is no solenoid valve between the compressor and the evaporator, the gas is forced into a large amount of liquid, thus causing a harsh sound.

  In addition, consumer electronics manufacturers are constantly striving to reduce power consumption so that this benefit is highly appreciated by consumers or conforms to a prescribed framework.

  An object of the present invention is to provide a roll bond type vertical evaporation panel for a refrigerator or freezer that can reduce the energy consumption of the evaporator and reduce the sound level.

  The present invention includes a roll bond type circuit including a refrigerant liquid circulation pipe having a low part and an ascending part, and at least a part of the low part pipe accumulates refrigerant liquid in a liquid state having a maximum height hi. The total height of the accumulation area is adjusted so that the total volume of the accumulation area is more than half of the total volume of the refrigerant liquid, and each height hi is less than 70% of the total height Hi of the pipe. The purpose is a vertical evaporating panel for cooling a refrigerator or freezer.

  FIG. 1a illustrates a longitudinal section of a pipe part of a panel according to the invention with a siphon that limits the extent of the refrigerant liquid storage area.

  FIG. 1b illustrates another embodiment of the accumulation area of the pipe according to the invention with protrusions.

  FIG. 1c illustrates a pipe component that combines the two embodiments of FIGS. 1a and 1b.

  FIG. 1d shows a boiler-type pipe according to the invention.

  FIG. 2 illustrates an embodiment of the overall panel according to the invention.

  The invention mainly consists of providing a pipe with this liquid storage area in the lower part of the evaporation circuit so as to avoid the liquid refrigerant in the liquid state completely filling the pipe in the lower part of the circuit. Due to these accumulation zones present in only a part of the pipe or in total, the liquid in the panel is relatively even when the compressor is stopped, provided that the total volume of the accumulation zone is more than half of the total volume of liquid. Distribution is possible and, as a result, the level of sound when the compressor is restarted is minimized.

  However, preventing or excessively reducing the accumulation of liquid from passing gas resulting from evaporation of the liquid is detrimental to the thermal efficiency of the device and must be avoided. For this purpose, the liquid height hi in the accumulation area must be sufficient, but not to exceed 70% of the total height Hi of the pipe.

  Several embodiments are possible as a storage area. The embodiment shown in FIG. 1a consists of bending the pipe upwards to confine a certain volume of liquid but forming a siphon that allows gas to pass sufficiently.

  The embodiment shown in FIG. 1b consists in that the pipe is provided with vertical projections for the accumulation of liquid facing downwards, which have the advantage that they do not reduce the cross-sectional area of the passage of gas in the pipe. When the compressor is operating, these protrusions allow the liquid to evaporate directly in areas away from the pipe, thereby helping to cool these areas and thus improve the thermal efficiency of the cooling circuit. The embodiment shown in FIG. 1c combines the above two embodiments.

  The embodiment shown in FIG. 1d illustrates the use of a boiler-type pipe, i.e. a large pipe having parts joined in a polka dot shape. By using these polka dots, the internal pressure, for example, the pressure of the refrigerant liquid during testing to detect cracks that may occur in certain operating conditions or in the evaporator prior to assembly of the refrigerator or freezer. The deformation of the pipe due to the action can be reduced, and the width of the pipe can be increased. If the passage area of the gas evaporating from the accumulation area is reduced by the polka dot pattern, it will increase the sound level in spite of the presence of the accumulation area according to the invention, so that the passage area should not be excessively reduced. Therefore, the sum of the polka dot widths li in the boiler area must not exceed 90% of the total length Li of the boiler area.

  FIG. 2 shows an embodiment of the whole panel where the majority of the ends of the horizontal pipe in the lower part of the circuit show the siphon shape and the lower pipe comprises protrusions.

  The cooling panel according to the present invention can reduce the power consumption and sound level of the refrigerator or freezer.

Schematic diagram of a longitudinal section of a part of a pipe of a panel according to the invention with a siphon that limits the extent of the refrigerant liquid storage area Schematic illustration of another embodiment of a storage area of a pipe according to the present invention with protrusions Schematic diagram of a pipe component combining the two embodiments of FIGS. 1a and 1b Schematic of a boiler-type pipe according to the invention Schematic of one embodiment of the entire panel according to the invention

Claims (5)

  A circuit comprising a refrigerant liquid circulation pipe having a lower part and an ascending part is provided, and at least a part of the lower part pipe is provided with an accumulation area in the liquid state of the refrigerant liquid having the maximum height hi, For cooling a refrigerator or freezer, where the total height is adjusted so that the height hi is less than 70% of the total height Hi of the pipe. Roll bond type vertical evaporation panel.   The panel according to claim 1, characterized in that the end of one or more pipes curves upwards to form a siphon and constitute a storage area.   3. A panel according to claim 1 or 2, characterized in that at least one of the pipes is provided with a vertical projection directed downwards and constitutes a storage area.   The panel according to any one of claims 1 to 3, comprising a boiler-type pipe having a central area joined in a polka dot shape.   The panel according to claim 4, characterized in that the total of the polka dots width li is less than 90% of the boiler length Li.

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