JPH08200746A - Refrigerator - Google Patents

Abstract

PURPOSE: To stabilize the operation and to reduce the size of a compressor unit by disposing a liquid receiver in an air cooled condenser unit disposed outside, and eliminating a liquid receiver in the compressor unit. CONSTITUTION: An air cooled condenser unit 2 is installed outdoor, a liquid receiver 6 is disposed in the unit 2, and a liquid receiver in an indoor compressor unit 1 is eliminated. Refrigerant gas discharged from the compressor 4 in the unit 1 is condensed by a heat exchanger 10 in the unit 2 to be liquid refrigerant, which is inserted to the receiver 6. The liquid refrigerant introduced to the receiver 6 is further continuously cooled by the air to supercooled refrigerant, which is merely passed via the unit 1 in a short time. Thus, it can arrive at a solenoid valve 7 and an expansion valve 8 without reevaporating, thereby performing a stable operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooled separate type refrigeration system.

[0002]

2. Description of the Related Art A conventional air-cooled condenser unit is disclosed in
2-82036, Japanese Patent Laid-Open No. 2-187577, and Japanese Utility Model Publication No. 3
As described in Japanese Patent Laid-Open No. 11630, only a heat exchanger and a blower are mainly provided and these are covered with a cabinet. Therefore, the liquid receiver is arranged on the compressor unit side.

[0003]

Since the liquid receiver in the prior art is arranged on the side of the compressor unit, the liquid refrigerant condensed in the air-cooled condenser unit is reheated by the ambient temperature of the compressor unit and the liquid refrigerant is reheated. However, there are drawbacks such that some of them are evaporated, the operation becomes unstable, and the size of the compressor unit becomes large.

[0004]

The air-cooling type separate refrigerating apparatus of the present invention has the structural features described in claims 1 to 4 of the claims.

[0005]

In the present invention, the condensed liquid refrigerant is temporarily held in the liquid receiver arranged in the air-cooled condenser unit, but since the ambient temperature of the liquid receiver is lower than the liquid refrigerant temperature, Also, the cooling action works and becomes a stable liquid refrigerant. Even if this liquid refrigerant passes through a compressor unit installed indoors at a temperature higher than the refrigerant temperature, the liquid refrigerant is indoors like a compressor unit equipped with a beneficiary of the related art. Unlike the possession, since the liquid refrigerant only passes through, the liquid refrigerant is less heated and a relatively stable liquid refrigerant can be obtained. Further, since the size of the compressor unit can be made small, it can be built in the evaporator portion, and a machine room as a compressor unit can be dispensed with.

[0006]

EXAMPLE As an example, a liquid refrigerant from the air-cooled condenser unit is shown in FIG. Fig. 2 shows an example in which the pipe once enters the cooler via the compressor unit (as an example in which the liquid refrigerant pipe from the air-cooled condenser unit does not go through the compressor unit, and directly enters the cooler and the compressor. An example of a compressor unit equipped with a scroll compressor in which the liquid refrigerant pipe from the air-cooled condenser unit branches the liquid injection refrigerant from the liquid pipe in the middle of entering the cooler will be described with reference to FIG.

FIG. 1 shows an air-cooled condenser unit 2, a cooler 3, an expansion valve 8 and a liquid solenoid valve, which mainly comprises a compressor unit 1 composed of a compressor 4, a heat exchanger 10, a blower 5 and a liquid receiver 6. A refrigeration cycle is formed in 7. The high-temperature high-pressure refrigerant gas discharged from the compressor 4 is condensed in the heat exchanger 5 in the air-cooled condenser unit 2, and the liquid refrigerant enters the liquid receiver 6. The temperature of the liquid refrigerant discharged from the heat exchanger 10 is cooled by the surrounding air, and is always higher than the air temperature, but the cooling by the air continues while the liquid receiver 6 holds the liquid refrigerant. Therefore, the refrigerant temperature approaches the ambient temperature as much as possible, and the refrigerant becomes a stable supercooled refrigerant. Even when it passes through the compressor unit part having a relatively high temperature when flowing through the cooler 8 on the indoor side, it is heated to a small degree because it is short in time, and the solenoid valve 7 and the expansion valve 8 are not re-evaporated. It is possible to reach the destination, and stable operation is possible without insufficient cooling. In addition, FIG. 2 shows an example in which the liquid pipe from the air-cooled condenser unit 2 is directly provided to the cooler 3 side without the compressor unit 1 in comparison with FIG. In addition to being able to obtain a more stable liquid refrigerant,
You can get the benefits of shorter piping and easier work. FIG. 3 shows an example in which a scroll compressor is installed as the compressor in FIG. The scroll compressor has the advantage of being able to cool the discharge gas temperature without reducing the refrigerant circulation amount on the cooler side by injecting liquid into the intermediate pressure chamber, but this liquid injection liquid refrigerant is used as an air-cooled condenser unit. 2 shows an example in which the liquid solenoid valve 2 and the liquid solenoid valve 7 are branched from the middle thereof and taken out. The liquid refrigerant for liquid injection also requires a supercooled and stable refrigerant, but the present invention is effective.

[0008]

According to the present invention, even if the liquid refrigerant condensed in the air-cooled condenser unit passes through the compressor unit installed on the indoor side having a temperature higher than the refrigerant temperature, the liquid refrigerant is merely passed. As a result, the liquid refrigerant is less heated and a relatively stable liquid refrigerant can be obtained. Further, since the size of the compressor unit can be made small, it can be built in the evaporator portion, and the machine room as the compressor unit can be dispensed with.

[Brief description of drawings]

FIG. 1 is a system diagram of a refrigeration cycle according to an embodiment of the present invention.

FIG. 2 is a system diagram of a refrigeration cycle according to an embodiment of the present invention.

FIG. 3 is a system diagram of a refrigeration cycle according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Compressor unit, 2 ... Air-cooled condenser unit, 2 ... Cooler, 4 ... Compressor, 4 '... Scroll compressor, 5 ... Blower, 6 ... Liquid receiver, 7 ... Liquid solenoid valve, 8 ... Expansion Valve, 9 ... Liquid injection piping, 10 ... Liquid exchanger.

Claims (1)

[Claims] 1. In an air-cooled separate type refrigeration system in which an air-cooled condenser unit is installed outdoors and a compressor unit and an evaporator are installed indoors, a receiver is placed in the air-cooled condenser unit installed outdoors. A refrigerating apparatus wherein the liquid receiver in the compressor unit is eliminated.