JPH09125052A - Refrigeration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigeration system inhibiting an obstruction in a capillary tube in the system caused by subsidiary materials or outbreak of sludge caused by water excellent in operability of freezing machine oil and high in reliability by using a specific mixed solvents and a freezing machine oil. SOLUTION: This refrigeration system uses a mixed coolant (A) comprising (Ax ) a coolant having polarity such as R-134a, etc., and (Ay ) a coolant without polarity such as R-600a, etc., and (B) a freezing machine oil having or not having a mutual solubility with (Ax ). Concretely, the component A1 compressed by the compressor 5 is discharged to the condenser 6, heat exchanged into a liquid coolant of high temperature and high pressure, passed through the capillary tube 7, reduced in pressure, changed in a liquid coolant of low temperature and low pressure with simultaneously dissolving the non-polar subsidiary materials by the function of (Ay ), is supplied to the evaporator 8, heat-exchanged into low temperature and low pressure gaseous coolant and returned to the compressor 5 while a small amount of component B9 is discharged from the compressor 5 with component (A1) but as the result of the effect of (Ax ) or (Ay ) the component B9 circulates the system with component (A1) and returns to the compressor 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, a refrigerating air-conditioning apparatus, and a refrigerating system using a refrigerant containing a polar refrigerant such as R-134a as a main component.

[0002]

2. Description of the Related Art In recent years, refrigerators, refrigerating air conditioners, and refrigerating systems have been conventionally used due to CFC regulations.
Refrigerants such as 2 can no longer be used, making process control difficult.

As a conventional refrigerator, refrigerating air-conditioning apparatus, and refrigerating system, there is one disclosed in Japanese Patent Laid-Open No. 5-157379.

The conventional refrigerator, refrigerating air-conditioning apparatus and refrigerating system will be described below with reference to the drawings.

FIG. 3 shows a system circuit of a conventional refrigerator. 4 is refrigerant R-134a, 5 is R-134
A compressor for compressing a4, 6 a condenser for condensing high-pressure and high-temperature R-134a4 discharged from the compressor 2, 7 a capillary tube, 8 an evaporator, 9 a compressor 5 stored in the compressor 5 Is a refrigerating machine oil ester oil that lubricates the sliding part and seals the compression chamber.

[0006] Regarding the refrigerator configured as described above,
The operation will be described below. R compressed by the compressor 5
-134a4 is discharged to the condenser 6, exchanges heat with the condenser 6 and becomes a high-temperature and high-pressure liquid refrigerant, and the capillary tube 7
Flows into the evaporator 8, is reduced in pressure by the capillary tube 7 and becomes a low-temperature low-pressure liquid refrigerant, flows into the evaporator 8, is heat-exchanged in the evaporator 8 and becomes a low-temperature low-pressure gas refrigerant, and is returned to the compressor 5. Also, during that time, the ester oil 9 was discharged from the compressor 5 at the same time as the R-134a4, but a small amount of the ester oil
Since it is compatible with -134a4, it circulates in the system together with R-134a4 and returns to the compressor 5. Therefore compressor 5
The ester oil 9 does not disappear inside and normal lubrication is possible.

[0007]

However, in the above-mentioned conventional configuration, both R-134a and ester oil have polarities, and the non-polar process auxiliary materials and the like in the refrigeration system such as the compressor and the refrigerator are not provided. However, there is a drawback in that the remaining capillary tube in the refrigeration system, which has the most volatile state change, is clogged to cause poor cooling.

Ester oil has a high hygroscopic property, and there are many problems in terms of production in handling, such as shortening the time during which the refrigeration cycle is open even when the refrigerator is assembled. Further, when a large amount of water enters the refrigeration cycle, there is a drawback that the generation of sludge is accelerated and the capillary tube is blocked to cause cooling failure.

The present invention solves the conventional problems by providing compatibility between a process auxiliary material having no polarity and a refrigerant so that the process auxiliary material is not left in the capillary tube, and the refrigerating machine oil It is possible to obtain a highly reliable refrigerator, a refrigerating air-conditioning apparatus, and a refrigerating system in which the hygroscopicity can be improved and handleability can be improved and sludge is less likely to occur.

[0010]

To achieve this object, the refrigeration system of the present invention uses R-134a as refrigerating machine oil.
Refrigerating machine oil compatible with a refrigerant having a polarity such as R is composed of a refrigerant having a polarity such as R-134a and a refrigerant having no polarity, for example, a mixed refrigerant such as R-600a. .

Further, as refrigerating machine oil, R-134 is used.
Refrigerating machine oil that is incompatible with a refrigerant having polarity such as a,
The refrigerant is composed of a refrigerant having a polarity such as R-134a and a refrigerant having no polarity, for example, a mixed refrigerant of R-600a.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the refrigeration system of the present invention, since a part of the refrigerant does not have polarity, process auxiliary materials having no polarity can be melted and clogging of the capillary tube of the process auxiliary material can be prevented. .

In this refrigeration system, the refrigerating machine oil is R
Refrigerator oil itself has no polarity because it is not compatible with -134a, it has low hygroscopicity, is easy to handle in production, and can prevent sludge from being generated due to moisture. Since it does not exist, it can be melted with the refrigerating machine oil that is not compatible with R-134a and the return of the refrigerating machine oil can be secured.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a refrigerator, a refrigerating air-conditioning apparatus and a refrigerating system according to the present invention will be described below with reference to the drawings. Regarding the same configuration as the conventional one,
The same reference numerals are given and the detailed description is omitted. 1 is a system circuit diagram of a refrigerator, a refrigerating air-conditioning apparatus, and a refrigerating system according to a first embodiment of the present invention.

Reference numeral 1 is a mixed refrigerant of R-134a and R-600a. The operation of the refrigerator, the refrigerating air-conditioning apparatus, and the refrigerating system configured as described above will be described below. R-134a and R-60 compressed by the compressor 5
The mixed refrigerant 1 of 0a is discharged to the condenser 6, heat-exchanged in the condenser 6 to become a high-temperature and high-pressure liquid refrigerant, flows into the capillary tube, and is decompressed in the capillary tube 7 to become a low-temperature and low-pressure liquid refrigerant, and at the same time, R-134a. And R-600
Since R-600a of the mixed refrigerant 1 of a has no polarity, it melts the non-polar process submaterials and flows into the evaporator 8 together, and heat is exchanged in the evaporator 8 to become a low-temperature low-pressure gas refrigerant, which becomes a compressor. Returned to 5.

Also, during that time, a small amount of the ester oil 9 is simultaneously discharged from the compressor 5 at the same time as the mixed refrigerant 1 of the R-134a and R-600a from the compressor 5, but the mixture of R-134a and R-600a. Since it is compatible with R-134a of the refrigerant 1, it circulates in the system together with the mixed refrigerant 1 of R-134a and R-600a and returns to the compressor 5. Therefore, normal lubrication is possible without exhausting the ester oil 9 in the compressor 5.

FIG. 2 is a system circuit diagram of a refrigerator, a refrigerating air-conditioning apparatus and a refrigerating system according to a second embodiment of the present invention. 2 is a mineral oil which is incompatible with R-134a.

The operation of the refrigerator, the refrigerating air-conditioning apparatus and the refrigerating system configured as described above will be described below. R-134a and R-60 compressed by the compressor 5
The mixed refrigerant 1 of 0a is discharged to the condenser 6, heat-exchanged in the condenser 6 to become a high-temperature and high-pressure liquid refrigerant, flows into the capillary tube 7, and is decompressed in the capillary tube 7 to become a low-temperature and low-pressure liquid refrigerant. R-134a and R
Since the mixed refrigerant 1 of -600a has no polarity of R-600a, it melts process non-polar materials having no polarity, flows into the evaporator 8 together, and is heat-exchanged in the evaporator 8 to become a low-temperature low-pressure gas refrigerant and compressed. Returned to machine 5.

In the meantime, during the period from the compressor 5 to R-134a and R-134a
A small amount of mineral oil 2 is discharged from the compressor 5 at the same time as the mixed refrigerant 1 of -600a and R-600a of the mixed refrigerant 1 of R-134a and R-600a and mineral oil 2 are compatible with each other.
It circulates in the system together with the mixed refrigerant 1 of 134a and R-600a, and returns to the compressor 5. Therefore, the mineral oil 2 does not run out in the compressor 5, and normal lubrication is possible.

[0020]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, a refrigerating machine oil compatible with a non-polar refrigerant such as R-134a and a refrigerant having no polarity with R-134a as a refrigerant are used. Since the refrigerator, the refrigeration air-conditioning apparatus, and the refrigeration system are configured with the mixed refrigerant, the non-polar process auxiliary material in the refrigeration system does not have the polarity of the mixed refrigerant of R-134a and the non-polar refrigerant. It is possible to prevent the capillary tube from being melted by the refrigerant and left behind in the capillary tube whose state changes most rapidly in the system, and to prevent the capillary tube from being blocked.

Further, the present invention further provides R as refrigerating machine oil.
A refrigerator, a refrigerating air-conditioning apparatus, and a refrigerating system are configured from a refrigerating machine oil that is not compatible with a nonpolar refrigerant such as −134a, and a mixed refrigerant of R-134a as a refrigerant and a nonpolar refrigerant. Since the machine oil is not compatible with R-134a, the refrigerator itself has no polarity, has little hygroscopicity, is easy to handle in production, and can prevent the generation of sludge due to moisture. Since the part has no polarity, the non-polarized refrigerant is compatible with the refrigerating machine oil that is not compatible with R-134a, and the return of the refrigerating machine oil can be secured.

[Brief description of the drawings]

FIG. 1 is a system circuit diagram of a refrigerator, a refrigerating air-conditioning apparatus, and a refrigerating system according to a first embodiment of the present invention.

FIG. 2 is a system circuit diagram of a refrigerator, a refrigerating air-conditioning apparatus, and a refrigerating system according to a second embodiment of the present invention.

FIG. 3 is a system circuit diagram of a conventional refrigerator

[Explanation of symbols]

 1 Mixed refrigerant of R-134a and R-600a 2 Mineral oil 9 Ester oil

Claims (2)

[Claims] 1. A refrigerating machine oil which is compatible with a refrigerant having a polarity such as R-134a is used as the refrigerating machine oil, and a mixed refrigerant of a refrigerant having a polarity such as R-134a and a non-polarizing refrigerant is used as the refrigerant. A refrigeration system characterized by using and. 2. A mixed refrigerant of a refrigerant having a polarity such as R-134a and a refrigerant having no polarity is used as the refrigerant, using a refrigerant oil that is incompatible with a refrigerant having a polarity such as R-134a as the refrigeration oil. A refrigerator, a refrigerating air-conditioning apparatus, and a refrigerating system characterized by using and.