JP2001280755A - Cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooler device in which a condenser and a blower for the condenser are integrally formed to reduce cost. SOLUTION: A cooling device 1 is constructed such that a blower 31 for a condenser is fixed to a condenser 4 of the cooling device 1 comprised of a compressor 2, the condenser 4, the blower 31 for the condenser and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a compressor, a condenser,
The present invention relates to a cooling device including a blower for a condenser.

[0002]

2. Description of the Related Art Conventionally, this type of cooling apparatus is provided with a cooling apparatus for cooling the inside of a refrigerator, for example, in a freezing or refrigerated showcase. When the compressor provided in the cooling device is operated, the high-temperature and high-pressure gas refrigerant discharged from the compressor flows into the condenser from the pipe, radiates heat there, is condensed and liquefied, and then flows into the receiver. There it is temporarily stored. The liquid refrigerant stored in the receiver is separated into gas and liquid, and only the liquid refrigerant is throttled by the expansion valve. Then, the liquid refrigerant flows into the evaporator, where it is vaporized and vaporized. At that time, a refrigerant circuit is produced by absorbing heat from the surroundings to exhibit a cooling effect and to be sucked into the compressor.

A cooling device including a compressor, a condenser and the like provided in a refrigerant circuit is unitized and installed in a showcase. A condenser blower was installed in the condenser provided in the unit. When the condenser blower is mounted on the unit base, L-shaped mounting legs 102 are fixed to both sides of the condenser blower 101 as shown in FIG. 4, and the lower sides of the mounting legs are fixed to the unit base (not shown). Was.

[0004]

However, when the blower for the condenser is mounted on the unit base, the blower for the condenser always needs mounting legs for mounting on the unit base.

Also, there is a gap between the blowers for the condenser and the blower for the condenser, and there has been a problem that the cooling device is enlarged by the gap.

The present invention has been made to solve the problems of the prior art, and has as its object to provide a cooling device in which a condenser and a blower for the condenser are integrated to reduce the cost. I do.

[0007]

That is, the cooling device of the present invention is a cooling device provided with a compressor, a condenser, a blower for the condenser, and the like, wherein the blower for the condenser is fixed to the condenser.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a cooling device 1 of the present invention, and FIG.
Is a plan view of the cooling device 1 of the present invention, and FIG. 3 is a refrigerant circuit diagram of the cooling device 1 of the present invention.

The cooling device 1 is used for cooling the inside of a refrigerator, for example, a freezer or a refrigerated showcase, and the cooling device 1 including the compressor 2 and the condenser 4 is unitized. In the cooling device 1, a compressor 2 composed of a reciprocating compressor, a rotary compressor, a scroll compressor and the like is installed on a unit base 30 made of a metal plate or the like. It is connected to the. The outlet side of the condenser 4 is connected to a liquid receiver 5, and a pipe 6 on the outlet side of the liquid receiver 5 is connected to a service valve 9 via a refrigerant liquid outlet service valve 7 and a dryer 8.

A pipe 10 on the outlet side of the service valve 9 exits the cooling device 1 and is connected to a liquid pipe solenoid valve 11. The liquid pipe solenoid valve 11 is connected to an expansion valve 12 as a pressure reducing device. It is connected to the evaporator 13.

A pipe 14 on the outlet side of the evaporator 13 is connected to a service valve 15 provided at an inlet of the cooling device 1, and a pipe 16 on the outlet side of the service valve 15 is connected to a strainer 17 and the compressor 2 side in a forward direction. Are connected to accumulators 19 and 20 via a check valve 18, and the accumulator 20 is connected to a pipe 21 on the suction side of the compressor 2 to form an annular refrigerant circuit.

A liquid injection circuit 25 is provided in the pipe 6 between the liquid receiver 5 and the service valve 7.
The liquid injection circuit 25 branches off from the pipe 6 and is connected to the compressor 2 via a strainer 22, a thermo valve 23 and a capillary tube 24. A sensor 23 </ b> A is connected to the thermovalve 23, and the sensor 23 </ b> A is attached to the pipe 3 on the discharge side of the compressor 2.

Further, a high pressure switch 28 is connected to the pipe 6 between the receiver 5 and the service valve 7 and the pipe 16 between the service valve 15 and the strainer 17. The high pressure switch 28 is connected to the pressure reducing tube 26 and the pressure reducing tube 2.
The pressure in the pipes 6 and 16 is detected via the switch 7 and the compressor 2 is stopped and protected when the pressure between the pipes 6 and 16 exceeds a predetermined pressure difference.

The thermo valve 23 is connected to the compressor 2
It opens and closes according to the temperature detected by the sensor 23A attached to the pipe 3 on the discharge side. That is, the thermo valve 23
Converts the refrigerant discharged from the condenser 4 according to the refrigerant temperature discharged from the compressor 2 detected by the sensor 23A into a capillary tube 24.
The so-called injection amount, which is cooled down by flowing into the compressor 2, can be adjusted according to the temperature of the refrigerant discharged from the compressor 2.

The condenser 4 includes a plurality of heat exchange fins 4.
A is a fin tube type heat exchanger constructed by inserting the pipe 4B in a meandering shape, and the pipe 4B is fixed to the fixtures 4C provided near both sides of the pipe 4B.
The lower part of C is fixed to the unit base 30 by bolts or welding. A substantially rectangular frame 32, which is located on the side of the condenser 4, and a condenser blower 31, which is not shown, and includes a motor and a propeller fan, are provided.

Screw holes 32A are provided at the four corners of the frame 32 of the condenser blower 31, and the screw holes 32A and the screw holes provided in the fixture 4C of the condenser 4 are condensed with the screw holes 32A. The dexterous blower 31 is fixed to the side surface of the condenser 4 with screws (not shown). That is, the condenser blower 31
Is integrally fixed to the frame 32 of the condenser 4 with screws.

Next, the operation of the cooling device 1 will be described. still,
It is assumed that a predetermined amount of refrigerant is sealed in the refrigerant circuit, and the service valves 7, 9, 15 and the liquid pipe solenoid valve 11 are open. When the compressor 2 is operated, a high-temperature and high-pressure gas refrigerant is discharged from the compressor 2, and the high-temperature and high-pressure gas refrigerant flows into the condenser 4 through the pipe 3.

The refrigerant flowing into the condenser 4 is radiated and condensed and liquefied by the operation of the condenser blower 31, and then flows into the receiver 5 where it is temporarily stored. The liquid refrigerant stored in the receiver 5 is gas-liquid separated and only the liquid refrigerant is supplied to the pipe 6, the service valve 7, the dryer 8, the service valve 9, the pipe 1
0, it reaches the expansion valve 12 via the liquid pipe solenoid valve 11, where it is throttled and then flows into the evaporator 13.

The liquid refrigerant flowing into the evaporator 13 evaporates there and absorbs heat from the surroundings at that time to exert a cooling function to cool the inside of the refrigerator. The refrigerant exiting the evaporator 13 enters the accumulators 19 and 20 via the pipe 14, the service valve 15, the pipe 16, the strainer 17, and the check valve 18, where the unevaporated refrigerant is separated into gas and liquid. Is drawn into the compressor 2 from the pipe 21.

Here, when the cooling device 1 is operated, the temperature of the compressor 2 rises to a high temperature. When the temperature of the compressor 2 becomes high, the sensor 23A detects the temperature of the pipe 3 on the discharge side of the compressor 2, and when the detected temperature is higher than a preset temperature, the thermo valve 23 opens according to the temperature. When the thermo valve 23 is opened, a part of the liquid refrigerant flowing out of the liquid receiver 5 flows into the liquid injection circuit 25 and the strainer 2
2. After being squeezed by the capillary tube 24 via the thermo valve 23, it is discharged into the compressor 2.

The liquid refrigerant discharged into the compressor 2 evaporates there and exerts an endothermic effect to cool the high-temperature compressor 2. As a result, during the cooling operation, the compressor 2
Is prevented, the compressor 2 does not stop due to the abnormal temperature rise. When the temperature of the refrigerant liquefied in the condenser 4 becomes low at a low outside air temperature, the oil temperature of the compressor 2 becomes too low due to the liquid injection into the compressor 2. There is no problem because it is adjusted.

As described above, since the condenser blower 31 is integrally fixed to the condenser 4, it is not necessary to use mounting legs for attaching the condenser blower to the unit base as in the conventional case. Thereby, the number of work steps for mounting the mounting legs can be reduced.

Further, since the condenser blower 31 is fixedly attached to the condenser 4, the space between the condenser blower 31 and the condenser 4 can be completely eliminated. Thereby, the cooling device 1 can be reduced in size by the space between the condenser blower 31 and the condenser 4, and the size of the cooling device 1 can be reduced.

[0024]

As described above in detail, according to the present invention, the cooling device is provided with a compressor, a condenser, a blower for the condenser and the like, and the blower for the condenser is fixed to the condenser. As described above, there is no need for mounting legs for mounting the condenser blower to the unit base. This makes it possible to reduce the work of mounting the mounting legs. Therefore, it is not necessary to use the mounting legs as in the related art, and it is possible to contribute to a reduction in the cost of the cooling device.

In particular, since the condenser blower can be tightly fixed to the condenser, the space between the condenser blower and the condenser can be completely eliminated. Therefore, the size of the cooling device can be reduced by the space between the condenser blower and the condenser, and the size of the cooling device can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a cooling device 1 of the present invention.

FIG. 2 is a plan view of the cooling device 1 of the present invention.

FIG. 3 is a refrigerant circuit diagram of the cooling device of the present invention.

FIG. 4 is a front view of a conventional condenser blower to which mounting legs are attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling device 2 Compressor 3 Piping 4 Condenser 4A Heat exchange fin 4B Piping 4C Fixing fixture 5 Liquid receiver 6 Piping 7 Service valve 8 Dryer 9 Service valve 10 Piping 11 Liquid pipe solenoid valve 12 Expansion valve 13 Evaporator 14 Piping 15 Service valve 16 Piping 17 Strainer 18 Check valve 19 Accumulator 20 Accumulator 21 Piping 22 Strainer 23 Thermo valve 23A Sensor 24 Capillary tube 25 Liquid injection circuit 26 Decompression tube 27 Decompression tube 28 High pressure switch 30 Unit base 31 Blower for condenser 32 Frame 32A screw hole

Claims (1)

[Claims] 1. A cooling device provided with a compressor, a condenser, a blower for a condenser, and the like, wherein the blower for the condenser is fixed to the condenser.