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Hermetic compressor and refrigeration system

a compressor and refrigeration system technology, applied in the direction of positive displacement liquid engines, pumping, lighting and heating apparatus, etc., can solve the problems of increasing aggression to organic materials, clogging of capillaries, and sludge accompanying extraction, so as to suppress the aggression of refrigeration oil to organic materials, reduce the extraction of organic materials, and reduce the effect of aggression of refrigeration oil

Inactive Publication Date: 2010-07-08
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]The present invention provides a very reliable hermetic compressor and refrigeration system by suppressing aggression of a refrigeration oil to an organic material. In the hermetic compressor and the refrigeration system of the present invention, the ratio of the carbon number of the hydrocarbon radical bound to the ester group of the refrigeration oil using the alicyclic multivalent carboxylic acid ester compound as a base oil is controlled.
[0013]With the configuration, aggression of the refrigeration oil to an organic material can be suppressed. Thus, the hermetic compressor and the refrigeration system of the present invention have the effect that extraction from an organic material is reduced.

Problems solved by technology

Therefore, aggression to an organic material increases.
It causes extraction from the organic material, occurrence of a sludge accompanying the extraction, and clogging in a capillary.

Method used

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  • Hermetic compressor and refrigeration system
  • Hermetic compressor and refrigeration system
  • Hermetic compressor and refrigeration system

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first embodiment

[0046]FIG. 3 is a diagram showing the relation between the carbon number of a hydrocarbon radical and the swelling ratio of an organic material in the present invention. In FIG. 3, C1, C4, C8 and C9 denotes a hydrocarbon radical whose carbon number is 1, 4, 8 and 9, respectively, and content ratio is the ratio of C1, C4, C8 and C9 among all hydrocarbon radicals. FIG. 3 shows the result of evaluation of a shield tube test between HFC-134a and refrigeration oil 103.

[0047]In FIG. 3, in the case where the alicyclic multivalent carboxylic acid ester compound in which the carbon number of R1 is 4 or less is 15% by weight or less, penetration to an organic material is small and the swelling ratio is low. That is, the result is excellent. It was understood that, however, when the compound exceeds 20% by weight, penetration to an organic material increases, and the swelling ratio increases.

[0048]Increase in the swelling ratio denotes that refrigeration oil 103 penetrates an organic material,...

embodiment 1

[0069]Table 1 shows the result of evaluation made in a shield tube test between HFC-134a and refrigeration oil 203. Here, refrigeration oil 203 is a same refrigeration oil of

TABLE 1Mixing ratio(% by weight)0103050HueL 0.5L 0.5L 0.5L 0.5Total acid number0.010.010.010.01

[0070]It is understood from Table 1 that, when the mixture ratio of the ester oil obtained by the reaction between aliphatic alcohol and fatty acid is 0% to 50% by weight, the characteristics of refrigeration oil 203 are stable. It means that, at the time of replacing hermetic compressor 201 for service or the like, hermetic compressor 201 can be simply replaced without washing the inside of the refrigeration system.

[0071]Further, a life test was conducted in a refrigeration system constructed by hermetic compressor 201, condenser 206, expansion mechanism 207, and evaporator 208. In the test, refrigeration oil 203 in which 50% by weight of the ester oil obtained by the reaction between aliphatic alcohol and fatty acid ...

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Abstract

In a hermetic compressor, aggression to an organic material is low by using a refrigeration oil using, as a base oil, an alicyclic multivalent carboxylic acid ester compound and made of an alicyclic multivalent carboxylic acid ester compound having at least two ester groups, the at least two ester groups being bound to carbon atoms adjacent to each other on an alicyclic ring. The ratio of hydrocarbon radicals in which carbon number is 4 or less among hydrocarbon radicals bound to the at least two ester groups is 15% by weight or less.

Description

TECHNICAL FIELD[0001]The present invention relates to a hermetic compressor and a refrigeration system using a refrigerant whose main component is a hydrofluorocarbon refrigerant and whose critical temperature is 40 degrees centigrade or higher.BACKGROUND ART[0002]In recent years, from the viewpoint of environmental pollution, particularly, ozone layer depletion and global warming, the use of chlorofluorocarbon is a control subject worldwide. For example, chlorofluorocarbon 12 used as a refrigerant of a refrigeration system such as a refrigerator or dehumidifier is also a control subject. As a refrigerant replacing chlorofluorocarbons, attention is being paid to hydrofluorocarbon (HFC) refrigerants which do not destroy the ozone layer and whose ozone depletion potential is 0. A representative refrigerant is HFC-134a. A conventional hermetic compressor and a conventional refrigeration system using HFC-134a use a refrigeration oil whose base oil is an alicyclic multivalent carboxylic ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B43/00F25B1/00F04B35/04F04B39/00
CPCC10M105/36C10M171/008C10M2207/2825C10N2220/022C10N2220/302C10N2230/06C10N2240/30C10N2020/02C10N2020/101C10N2030/06C10N2040/30F04B39/00C10M171/00F25B31/00
Inventor YOSHIMI, YUUKI
Owner PANASONIC CORP
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