JPH05164411A - Refrigerating system - Google Patents

Abstract

PURPOSE:To omit the use of a drain pan and prevent a compressor from developing rust on it by providing compressor-containing double-shell of the compressor, condenser, and evaporator and injecting part of the coolant liquid from the compressor to the surfaces of the compressor. CONSTITUTION:The subject refrigerating system is provided with a compressor- containing double-shell vessel 2 that receives high temperature high pressure coolant gas from a compressor 1, heats the surfaces of the compressor 1, and is connected to the compressor 1 and a condenser 4 that liquefy the coolant gas from the vessel 2, and an expansion valve 6 that reduces the pressure of the coolant liquid from the condenser 4. An evaporator 7 is provided to send, after the low pressure coolant liquid from the expansion valve 6 is evaporated, the evaporated coolant as low pressure coolant to the compressor 1, and part of the coolant liquid from the condenser 4 is injected to the surfaces of the compressor 1. As a result, since the compressor-containing double-shell vessel 2 heats the surfaces of the compressor 1 by leading the high temperature coolant gas to the inside, the coolant liquid that cools the surfaces of the compressor 1 is prevented from condensing or freezing on to the surfaces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system for injecting a refrigerant liquid to cool a compressor.

[0002]

2. Description of the Related Art FIG. 3 is a piping system diagram showing a conventional refrigeration system, in which 1 is a compressor for compressing a refrigerant,
Reference numeral 3 is a refrigerant discharge pipe, 4 is a condenser for condensing the refrigerant from the discharge pipe 3, 5 is a refrigerant liquid injection pipe, 6 is an expansion valve for decompressing the refrigerant from the condenser 4, and 7 is an evaporator.

Further, FIG. 4 is an external view showing the installation structure of the refrigerant piping system, and 8 is a drain pan, which is mounted between the compressor 1 and the evaporator 7.
A condenser 4 is installed in the lower part of the.

Next, the operation will be described. First, the refrigerant gas compressed to a high temperature and high pressure by the compressor 1 is supplied to the condenser 4 via the discharge pipe 3 and is liquefied in the condenser 4. Further, the liquefied refrigerant is decompressed by the expansion valve 6 and further supplied to the evaporator 7, where it is evaporated to become a low-pressure refrigerant and returns to the compressor 1 again.

On the other hand, the refrigerant liquid condensed in the condenser 4 is also supplied to the refrigerant liquid injection pipe 5, and the refrigerant liquid is injected from the injection pipe 5 into the compressor 1 to cool the compressor 1. There is. Therefore, the surface of the compressor 1 is in a dew condensation or freezing state due to the latent heat of vaporization of the refrigerant liquid. Since the outer surface of the compressor 1 has irregularities, the drain pan 8 is provided to collect and discharge drain water.

[0006]

Since the conventional refrigeration system is constructed as described above, the injection of the refrigerant liquid causes dew condensation or freezing on the surface of the compressor 1, and the drain water resulting from the melting of the dew condensation is drained by the drain pan. It must be collected and discharged. Therefore, there is a problem that such a drain pan is required and the surface of the compressor 1 rusts due to repeated dry and wet.

The present invention has been made to solve the above-mentioned problems, and by allowing a high-temperature refrigerant gas to be constantly in contact with the surface of the compressor, dew condensation on the surface by the refrigerant liquid for cooling. The purpose is to obtain a refrigeration system that can prevent freezing and freezing.

[0008]

A refrigeration system according to the present invention includes a compressor for compressing a refrigerant gas, which receives a high temperature, high pressure refrigerant gas from the compressor and heats the surface of the compressor. Compressor double shell container connected in series and the compressor 2
A condenser for liquefying the refrigerant gas from the heavy shell container, an expansion valve for decompressing the refrigerant liquid from the condenser, and a low-temperature refrigerant after evaporating the low-temperature refrigerant from the expansion valve. And an evaporator for sending the refrigerant to the surface of the compressor through the injection pipe.

[0009]

In the compressor double shell container according to the present invention, the high temperature refrigerant gas is introduced to heat the compressor surface, so that the refrigerant liquid discharged from the injection pipe and cooling the compressor surface is To prevent condensation and freezing.

[0010]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a compressor, 2 is a compressor double shell container connected to the compressor 1, 3 is a refrigerant discharge pipe from the compressor 1, 4 is a condenser for liquefying the refrigerant, and 5 is a refrigerant liquid. Injection pipe, 6 is an expansion valve for decompressing the refrigerant from the condenser 4, and 7 is an evaporator.

The inside of the compressor double shell container 2 is divided into a plurality of spaces by a partition member 9 as shown in FIG. 2, and the structure of the compressor double shell container 2 is reinforced. There is.

Next, the operation will be described. First, the refrigerant is compressed by the compressor 1, and the refrigerant gas compressed here is immediately passed into the compressor double shell container 2. Therefore, the compressed high-temperature refrigerant heats the outer surface of the compressor 1 in which the refrigerant liquid from the condenser 4 is injected and is about to be condensed or frozen.

Therefore, the refrigerant liquid does not adhere to the surface of the compressor 1 to cause dew condensation or icing, and it is not necessary to provide a separate heat insulating means, and the use of the drain pan which receives the drop of dew condensation can be omitted. You can Further, since the refrigerant liquid does not adhere to the surface of the compressor 1 as described above, it is always in a dry state, and as a result, rusting on the surface of the compressor 1 can be avoided.

[0014]

As described above, according to the present invention, the high temperature and high pressure refrigerant gas from the compressor for compressing the refrigerant gas is connected to the compressor so as to heat the surface of the compressor. The compressor double shell container, the condenser for liquefying the refrigerant gas from the compressor double shell container, the expansion valve for decompressing the refrigerant liquid from the condenser, and the low temperature refrigerant from the expansion valve. After being evaporated, as a low-pressure refrigerant, an evaporator to be sent to the compressor is provided, and a part of the refrigerant liquid is injected from the condenser to the surface of the compressor through an injection pipe. By passing the discharge gas compressed by the compressor into the compressor double shell container, dew condensation or freezing on the surface of the compressor can be avoided. Therefore, the use of the drain pan can be omitted and the rust of the compressor can be prevented. What you can do There is an effect to be.

[Brief description of drawings]

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

FIG. 2 is a structural view showing the refrigeration system in FIG. 1 partially broken away.

FIG. 3 is a piping system diagram showing a conventional refrigeration system.

FIG. 4 is a structural diagram showing the refrigeration system in FIG.

[Explanation of symbols]

 1 Compressor 2 Compressor Double shell container 4 Condenser 5 Injection piping 6 Expansion valve 7 Evaporator

Claims (1)

[Claims] 1. A compressor for compressing a refrigerant gas, and a compressor dually connected to the compressor so as to heat the surface of the compressor upon receiving a high temperature, high pressure refrigerant gas from the compressor. A shell container, a condenser that liquefies the refrigerant gas from the compressor double shell container, an expansion valve that decompresses the refrigerant liquid from the condenser, and a low-temperature refrigerant that has evaporated from the expansion valve, A refrigeration system provided with an evaporator for sending to the compressor as a low-pressure refrigerant, and an injection pipe for injecting a part of the refrigerant liquid from the condenser onto the surface of the compressor.