JP2005195204A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator for efficiently heating and evaporating defrosting water in an evaporator 10 collected in a defrosting water pan 15 installed on the reverse face of a cabinet 3 whose reverse heat insulating wall is not protruded into the refrigerator. <P>SOLUTION: A discharge pipe 22 of a compressor 7 is led around and arranged near the defrosting water pan 15 provided on the reverse face of the cabinet, and a vacuum heat insulating material 23 and a drain 14 are embedded in layers in the reverse heat insulating wall of the cabinet 3. Thus, defrosting water is efficiently heated and evaporated in a small space. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a refrigeration unit in which a compressor and a condenser of a cooling system are installed at the upper part of the gantry and an evaporator is installed in the lower part of the gantry, and a large commercial refrigerator / freezer having the refrigeration unit at the upper part of the main body. It is.

  Conventionally, in a commercial large-sized refrigerator-freezer provided with the above-mentioned freezing / refrigeration unit at the top of the main body, the defrost water of the evaporator is discharged to the outside by being directly connected to the drainage equipment provided.

  However, when installing a commercial large-sized freezer refrigerator in a small kitchen without a built-in drainage system such as a home, it is desired to automatically process the defrosted water of the evaporator.

  In this case, a defrosting water treatment device that heats and evaporates the defrosted water of the evaporator with a heater is attached. However, in this method, there is a concern about an increase in power consumption accompanying heating of the heater. Then, the method of heating and evaporating the defrost water of an evaporator using the waste heat of a freezing / refrigeration unit is proposed (for example, refer patent document 1).

  Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  FIG. 3 is a cross-sectional view of a conventional refrigerator described in Patent Document 1.

  As shown in FIG. 3, it is composed of a freezer compartment 1, a door 2, and a cabinet 3. In the upper part of the cabinet 3, a unit base 5 for fixing the freezing / refrigeration unit 4 and a cooling room 6 for cooling the freezing room 1 are installed.

  The refrigeration unit 4 includes a compressor 7, a condenser 8, a capillary 9 as a decompression means, an evaporator 10, a suction pipe 11 of the compressor 7, a condensing fan 12, and an evaporating fan 13.

  Next, the operation of the refrigeration unit 4 will be described. The refrigerant is compressed by the compressor 7, condensed by the condenser 8, decompressed by the capillary 9, and sent to the evaporator 10. Then, after being evaporated by the evaporator 10, it is refluxed to the compressor 7 through the suction pipe 11. At this time, the capillary 9 and the suction pipe 11 are subjected to heat exchange, and the cold and waste heat of the refrigerant returning to the compressor 7 is recovered.

  Further, the cold air in the freezer compartment 1 is sucked in from the evaporation fan 13 attached to the front side, cooled in the cooler compartment 6 and blown out from the rear side, reaches the lower part of the freezer compartment 1 and reaches the freezer compartment. Cool the inside of 1 uniformly.

  And the drain 14 is embed | buried under the back heat insulation wall of the cabinet 3, and after the defrost water in the cooling chamber 6 is discharged | emitted to the defrost water receiving tray 15 installed in the back surface of the cabinet 3 via the drain 14, it is condensed. It is evaporated by the waste heat of the vessel 8.

As a result, there is no need to install a special defrosting water treatment device even in the case of installing a large commercial refrigerator-freezer in a small kitchen without a built-in drainage system such as a home, and the power consumption associated with heater heating Can be eliminated.
JP-A-6-82145

  However, when considering that the conventional refrigerator is installed with a back surface perfectly attached to a wall such as a kitchen, a problem arises in that the rear heat insulating wall of the cabinet protrudes to the inside of the cabinet and the internal volume is reduced. In addition, food stored in the freezer compartment becomes an obstacle because the cool air blowing position of the cooler room 6 is separated from the rear heat insulating wall of the cabinet, and in the large-sized freezer refrigerator for business use, the cold air that is usually provided on the rear face of the cabinet is There is also a problem that it becomes difficult to pass through the passage.

  Therefore, it is expected that the large-sized refrigerator-freezer for business use treats the defrosted water of the evaporator without the rear heat insulating wall of the cabinet protruding inside the cabinet.

  The present invention solves the above-described conventional problems, and evaporates defrost water efficiently in a small space so that the rear heat insulation wall of the cabinet does not protrude to the inside of the cabinet, and the defrost water treatment device installed on the rear surface The refrigerator which suppressed that the waste heat of the inside leaks in a store | warehouse | chamber is provided.

  In order to solve the above-mentioned conventional problems, the refrigerator has a defrost water tray installed outside the rear heat insulating wall below the evaporator, and a discharge pipe of the compressor routed in the vicinity of the defrost water tray. The defrost water is heated using a discharge gas refrigerant having a temperature higher than the condensing temperature.

  Thereby, it can heat efficiently in a small space.

  The refrigerator of this invention can process the defrost water of an evaporator, without the back heat insulation wall of a cabinet projecting inside a store | warehouse | chamber.

  The invention according to claim 1 of the present invention is a refrigerator having a condenser fan for cooling a condenser and a compressor, and a refrigerator having a refrigeration unit comprising an evaporator installed in the upper part, and a rear heat insulating wall below the evaporator. The defrosted water tray installed outside and the discharge pipe of the compressor on the defrosted water tray can be efficiently heated in a small space. Protruding to the inside of the warehouse can be suppressed.

  The invention according to claim 2 is the rib according to the invention according to claim 1, further comprising a back panel surrounding the defrost water tray and the discharge pipe of the compressor, and a rib installed between the back heat insulating wall and the back panel. And a rising air passage and a descending air passage are formed between the back heat insulation wall and the back panel, and superheated dry air staying in the upper part of the refrigeration unit is guided to the defrost water tray Since it can heat more efficiently by doing, it can suppress that the back heat insulation wall of a cabinet protrudes inside a store | warehouse | chamber.

  The invention according to claim 3 is the invention according to claim 1 or 2, further comprising: embedding a vacuum heat insulating material in the rear heat insulating wall of the evaporator, and setting the inner shape of the rear heat insulating wall to be substantially flat. This prevents the waste heat from the defrost water treatment equipment installed on the back side from leaking into the cabinet, and reduces the thickness of the back insulation wall of the evaporator, so that the back insulation wall of the cabinet is stored in the cabinet. Protruding inward can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a rear perspective view of the refrigerator according to the embodiment. In addition, about the same structure as the past, the same number is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 1, it is composed of a freezer compartment 1, a door 2 and a cabinet 3. In the upper part of the cabinet 3, a unit base 5 for fixing the freezing / refrigeration unit 20 and a cooling chamber 6 for cooling the freezing chamber 1 are installed.

  The refrigeration unit 20 includes a compressor 7, a main condenser 21, a discharge pipe 22 of the compressor 7, a capillary 9 as a decompression means, an evaporator 10, a suction pipe 11 of the compressor 7, a condensing fan 12, and an evaporating fan. It consists of thirteen.

  Next, the operation of the refrigeration unit 20 will be described. The refrigerant is compressed by the compressor 7, and the high-temperature discharge refrigerant passes through the discharge pipe 22 and is condensed by the main condenser 21, and then is decompressed by the capillary 9 and sent to the evaporator 10. Then, after being evaporated by the evaporator 10, it is refluxed to the compressor 7 through the suction pipe 11. At this time, the capillary 9 and the suction pipe 11 are subjected to heat exchange, and the cold and waste heat of the refrigerant returning to the compressor 7 is recovered.

  Further, the cold air in the freezer compartment 1 is sucked in from the evaporation fan 13 attached to the front side, cooled in the cooler compartment 6 and blown out from the rear side, reaches the lower part of the freezer compartment 1 and reaches the freezer compartment. Cool the inside of 1 uniformly.

  And the vacuum heat insulating material 23 is embed | buried in the back heat insulation wall of the cabinet 3, and the drain 14 is embed | buried so that the hole formed in the vacuum heat insulating material 23 may pass through, and the defrost water in the cooling chamber 6 is After being discharged to the defrosted water receiving tray 15 installed on the back surface of the cabinet 3 through the drain 14, it is evaporated by the waste heat of the high-temperature discharged refrigerant passing through the discharge pipe 22.

  Here, the vacuum heat insulating material 23 is formed by inserting a fine powder or fiber such as silica into a bag made of a gas barrier film having a multilayer laminate structure, and then evacuating the air in the bag to form a vacuum. It has a thermal conductivity of about 0.002 to 0.005 W / mK, which is 10 times that of a urethane heat insulating wall, and a through hole is formed in a part so that the drain 14 can be buried.

  By using this vacuum heat insulating material 23, the rear heat insulating wall of the cabinet 3 can ensure the same heat insulating performance with a normal thickness of 1/2 to 1/3, and the rear heat insulating wall is obtained by thinning. The defrost water treatment device comprising the defrost water receiving tray 15 and the discharge pipe 22 and the rear panel 24 that forms the air passage for discharging the evaporated defrost water is arranged in the same space as in the conventional case. Space can be secured.

  Further, as shown in FIG. 2, a rib 30 is provided between the rear heat insulating wall of the cabinet 3 and the rear panel 24 to block ventilation, and rise by natural convection at the center where the high temperature discharge pipe 22 is installed. When the airflow occurs, the outside air that is heated and dried by the main condenser 21 or the compressor 7 and stays in the vicinity of both side surfaces of the refrigeration unit 20 can be guided to the vicinity of the defrost water tray 15, and the defrost water tray 15 The defrosted water inside can be dried more efficiently.

  In a commercial refrigerator installed in a kitchen environment, dust in the air or splashed oil tends to adhere to the main condenser 21 and cause clogging. Therefore, it is desirable to reduce the influence of clogging and to attach a filter (not shown) to the front of the condenser 21.

  In order to facilitate the maintenance of the drain 14 and the defrosted water tray 15, it is desirable that the back panel 24 is detachably attached.

  As described above, in the embodiment of the present invention, the defrost water is efficiently evaporated in a small space, and the waste heat of the defrost water treatment device installed on the back surface is suppressed from leaking into the cabinet, so that the cabinet The defrosting water of the evaporator can be processed without the rear heat insulating wall of the projector protruding to the inside of the cabinet.

  The refrigerator according to the present invention does not require a special defrosting water treatment device to be attached in a small kitchen without a built-in drainage facility such as a home, and can eliminate an increase in power consumption accompanying heater heating. It can also be applied as a household refrigerator that has a freezer / refrigeration unit installed in the upper part and effectively uses the space in the cabinet.

Sectional view of a refrigerator according to the invention Rear perspective view of a refrigerator according to the present invention Cross-sectional view of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Freezer compartment 20 Refrigeration unit 21 Main condenser 22 Discharge piping 23 Vacuum heat insulating material 24 Back panel 30 Rib

Claims (3)

A condenser fan for cooling the condenser and the compressor, and a refrigerator in which a refrigeration unit consisting of an evaporator is installed at the top, a defrosted water receiving tray installed outside the rear heat insulating wall below the evaporator, The refrigerator provided with the discharge piping of the said compressor in the said defrost water receptacle. A rear panel surrounding the defrost water tray and the discharge pipe of the compressor, and a rib installed between the rear heat insulating wall and the rear panel, and rising air between the rear heat insulating wall and the rear panel The refrigerator according to claim 1, wherein a path and a descending air path are formed. The refrigerator according to claim 1 or 2, wherein a vacuum heat insulating material is embedded in the back heat insulating wall of the evaporator, and the interior shape of the back heat insulating wall is substantially flat.

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