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Refrigerating machine oil for hydrocarbon refrigerant and refrigerating machine system using the same

A technology of refrigerating machine oil and refrigerant, which is applied in the field of hydrocarbon refrigerants. It can solve the problems of clogging the capillary of the expansion valve and poor switching, and achieve the effect of preventing the clogging of the capillary and suppressing wax precipitation.

Active Publication Date: 2008-10-01
JAPAN ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precipitation of such wax may clog the capillary of the expansion valve, or adhere to the valve of the compressor, causing switching failure, etc.

Method used

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  • Refrigerating machine oil for hydrocarbon refrigerant and refrigerating machine system using the same
  • Refrigerating machine oil for hydrocarbon refrigerant and refrigerating machine system using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0036] Examples are shown below, and the present invention will be described in more detail, but the present invention is not limited to these specific examples.

[0037] As base oils, Base Oils 1 to 3 (paraffin-based mineral oils) and Base Oil 4 (naphthenic-based mineral oils) having properties shown in Table 1 were used.

[0038] [Table 1]

[0039] base oil 1

base oil 2

base oil 3

base oil 4

type

Paraffin

mineral oil

Paraffin

mineral oil

Paraffin

mineral oil

Paraffin

mineral oil

Kinematic viscosity at 40°C

(mm 2 / s)100℃

10

2.6

68

8.5

137

13

12

2.7

viscosity index

75

93

89

15

Sulfur content (mass ppm)

370

300

2900

160

Nitrogen composition (mass ppm)

＜1

12

10

5

Pour point (°C)

-30.0

-27.3

-27.5

-50.0

...

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PUM

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Abstract

The invention reduces wax precipitation temperature when using refrigerator oil with main components of low level hydrocarbon refrigerant and hydrocarbon-based oil. The invention is refrigerator oil for hydrocarbon refrigerant. The refrigerator oil is used for hydrocarbon refrigerant with 1 to 5 carbon atoms, characterized in that the refrigerator oil contains at least one of the hydrocarbon-based oil of 100 mass parts, vulcanized grease and vulcanized olefin of 0.001 mass part to 0.05 mass part. Preferably, the hydrocarbon-based oil is mineral oil with %Cp greater than 40, flow point less than or equal to -27.5 deg C and kinematic viscosity 40 deg C. In addition, the refrigerant is preferably propane or isobutene.

Description

technical field [0001] The present invention relates to a hydrocarbon refrigerant which does not have the concern of depleting the ozone layer and which has a much lower global warming potential than halogen-containing hydrocarbon refrigerants, and in particular relates to lubricating oils for refrigerators using propane or isobutane And the refrigeration system using the lubricating oil. Background technique [0002] Refrigerator systems generally use a compressor to compress the refrigerant, and use a condenser to dissipate heat from the high-pressure, high-temperature refrigerant. After that, an expansion mechanism (such as an expansion valve) is used to form a low pressure. When the refrigerant evaporates in the evaporator, Cooling is performed by taking away heat of evaporation from the surroundings to become a low temperature. The refrigerator system can be used in refrigerators, freezers, air conditioners, showcases, vending machines for soft drinks or ice cream, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C09K5/04C10M101/00C10M135/00C10N40/30
CPCC09K5/042C10M101/02C10M105/02C10M125/22C10N2020/097C10N2040/30
Inventor 高桥仁
Owner JAPAN ENERGY CORP
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