JPH11304337A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the repair of a freezing cycle, by expanding the end of the return pipe embedded in a heat insulating box, and arranging a decompressor wound in coil form in its inside, and taking out the decompressor from the connection to the return pipe in the vicinity of a compressor. SOLUTION: A decompressor 7 connected to the drier 10 at the outlet of a condenser is passed inside a return pipe 9 from a connection 9a on compressor side and a pipe joining pipe 9c, and is taken out from the junction 9b on the side of an evaporator, and is connected to the inlet pipe 8a of the evaporator. Then, the connection 9a on compressor side of the return pipe 9 and the suction pipe 5a of the compressor are expanded, and this refrigerator is provided with inner space which can accommodate the decompressor 7 in coil form, inside the return pipe joining pipe 9c for connecting the connection 9a on compressor side with the suction pipe 5a. Hereby, the length of the decompressor 7 and the pipe joining pipe 9c can be shortened, so the repair of the freezing cycle becomes easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating cycle of a refrigerator.

[0002]

2. Description of the Related Art An example of a conventional refrigerator will be described with reference to FIGS. FIG. 4 is a configuration diagram of a refrigeration cycle of a refrigerator.

[0003] Compressor 5, condenser 6, decompressor 7, evaporator 8
Is connected in an annular shape, and a dryer 10 for capturing moisture in the refrigeration cycle is provided at the outlet side of the condenser 6. The dryer 10 is connected to the evaporator 8 via the decompressor 7 and is connected to the evaporator 8. The compressor 5 is connected via a return pipe 9.

FIG. 5 is a detailed diagram of a conventional pressure reducer and a return pipe.

In FIG. 1, a decompressor 7 is connected from a dryer 10 at a condenser outlet (not shown) to an inlet pipe 8a of an evaporator (not shown), and a return pipe 9 is connected to an outlet pipe 8b of the evaporator and a compressor (not shown). (Not shown). In the refrigeration cycle shown in FIG. 4, a high-temperature refrigerant circulates from the compressor 5 to the decompressor 7 and a low-temperature refrigerant circulates from the evaporator 8 to the compressor 5. In general, to improve the cooling efficiency, There is a method in which the decompressor 7 and the return pipe 9 are bonded with solder or the like, or a heat-shrinkable tube is put on the return pipe 9 to forcibly contact the decompressor to exchange heat with the high-temperature refrigerant flowing in the decompressor. An example of this kind is disclosed in JP-A-1-98874.

[0006]

SUMMARY OF THE INVENTION In the prior art,
The decompressor generally uses a capillary tube, the length of which is generally very long, about 2 m in terms of performance, and is bonded to the return pipe with solder or the like for heat exchange. The return pipe must also be longer than the length of the capillary tube, resulting in poor workability and cost.

Further, since the capillary tube generally used as a decompressor has an extremely small inner diameter, abrasion powder generated due to deterioration of a sliding portion of a compressor, a product generated by deterioration of lubricating oil, and a motor resin resin insulating material. There is a possibility that pipes may be clogged due to residues of the extract and process auxiliary materials during the refrigeration cycle manufacturing process.

[0008] However, in the above-mentioned conventional example, it is difficult to remove the decompressor and the return pipe because they are adhered to each other and are generally buried in polyurethane foam, so that it is impossible to repair the clogged capillary tube. .

[0009]

In order to solve the above-mentioned problem, an end of a return pipe buried in a heat insulating box is expanded, and a pressure reducer wound in a coil shape is disposed inside the return pipe. The structure of taking out the decompressor from the connection with the return pipe near the refrigeration cycle makes it easy to repair the refrigeration cycle and shortens the length of the decompressor and the return pipe, improving workability and cost. Reduction can be realized.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of a main part of a refrigerator according to the present invention, FIG. 2 is a detailed structural view of a decompressor and a return pipe of the refrigerator according to the present invention, and FIG.

In FIG. 1, a refrigerator main body 1 includes a heat insulating box 2 and a heat insulating door 3. In the refrigerator main body 1, the compressor 5 is disposed in the lower rear portion of the heat insulating box 2, the machine room 4, the condenser 6 is disposed on the lower surface of the heat insulating box 2, and the evaporator 8 is disposed inside the heat insulating box 2. Main parts of the decompressor 7 and the return pipe 9 except for the connection portions at both ends are embedded in the heat insulating material of the heat insulating box 2.

In the refrigeration cycle, a compressor 5, a condenser 6, a decompressor 7, and an evaporator 8 are connected in a ring shape as in the conventional example shown in FIG. A dryer 10 for capturing moisture in the refrigeration cycle is provided at an outlet side of the condenser 6, and the decompressor 7 is connected to the condenser via the dryer 10. Also. Each connection is sealed with a brazing material or the like by welding.

In FIG. 2, a decompressor 7 connected to a dryer 10 at a condenser (not shown) outlet is connected to a compressor-side connection portion 9.
a, the return pipe passes through the inside of the return pipe 9 from the return pipe 9c, exits from the evaporator side connection portion 9b, and is connected to the inlet pipe 8a of an evaporator (not shown). Return piping 9
The compressor-side connecting portion 9a and the suction pipe 5a of the compressor (not shown) are expanded to provide an internal space capable of accommodating the coiled pressure reducer 7 inside a return pipe nail pipe 9c connecting the 9a and 5a. I have.

In FIG. 3, the return pipe 9c connecting the return pipe 9a and the compressor suction pipe 5a is connected to the return pipe 9c.
It has a gourd shape when viewed from the side a, and a groove 9d of an appropriate size for receiving the pressure reducer 7 is provided in a part of the inside. The nail pipe 9c has a structure in which the suction pipe 5a of the compressor 5 can be inserted in a state where the pressure reducer 7 is accommodated in the groove 9d. Also, the evaporator-side connection portion 9b of the return pipe 9 has a structure in which a groove similar to that of the nail pipe 9c is provided, and instead of the suction pipe 5a of the compressor 5, the outlet pipe of the evaporator 8 is provided on the inner diameter. 8b is inserted.

As described above, according to the present embodiment, the decompressor 7
Passes through the inside of the return pipe 9 buried in the heat insulating material of the heat insulation box 2, removes the suction pipe 5a of the compressor 5 from the return pipe nail pipe 9C, and the inlet pipe of the dryer 10 and the evaporator 8 from the pressure reducer 7. By removing 8a, the pressure reducer 7 can be easily pulled out from the return pipe 9 side and replaced.

Also, by making the linear length of the decompressor necessary for performance into a coil shape, the length of the decompressor in storage is shortened, and furthermore, the decompressor is disposed in the return pipe to provide heat. The replacement volume is increased, so that the shorter length of the decompressor and the return pipe can satisfy the conventional performance.

[0017]

According to the present invention, since the decompressor is passed through the return pipe in a coil shape, the depressurizer can be easily replaced even if the depressor is clogged. In addition, since the decompressor comes into direct contact with the low-temperature refrigerant in the return pipe and forms a coil, the amount of heat exchange with the high-temperature refrigerant in the decompressor increases, and the length of the decompressor and the return pipe can be shortened. Reduction and workability efficiency UP can be realized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a refrigerator to which a return pipe and a pressure reducer of the present invention are attached.

FIG. 2 is a detailed view of a return pipe and a pressure reducer of the refrigerator refrigeration cycle of FIG. 1;

FIG. 3 is a detailed cross-sectional view of the opening of the return pipe nail pipe of FIG. 2;

FIG. 4 is a general configuration diagram of a conventional refrigerator refrigeration cycle.

FIG. 5 is a detailed configuration diagram of a return pipe and a pressure reducer of a conventional refrigerator refrigeration cycle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body, 2 ... Insulated box, 3 ... Insulated door, 4 ... Machine room, 5 ... Compressor, 5a ... Compressor suction pipe, 6 ... Condenser, 7 ... Decompressor, 8 ... Evaporator, 8a ... Evaporator inlet pump, 8b evaporator outlet pipe, 9 return pipe, 9a compressor side connection, 9b evaporator side connection, 9c return pipe thread pipe, 9d groove, 10 dryer.

Claims (1)

[Claims] 1. A compressor, a condenser, a decompressor for guiding a refrigerant from the condenser to an evaporator, an evaporator disposed on a body to be cooled,
In a cooling device having a return pipe for guiding a refrigerant from the evaporator to a compressor, a part of the return pipe is expanded, and the decompressor wound in a coil shape is disposed therein. refrigerator.