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Refrigerant compressor

A refrigerant and compressor technology, applied in additives, mechanical equipment, machines/engines, etc., can solve the problems of exhaust reed seal failure and poor compression, and achieve high reliability and high efficiency.

Inactive Publication Date: 2008-03-26
PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such precipitates will be carbonized at high temperature, become viscous muddy deposits and accumulate, causing problems such as damage to the sealing of the exhaust reed and poor compression.
[0018] In addition, when R600a is used as the refrigerant, the pressure on the low-pressure side of the refrigeration cycle usually drops below atmospheric pressure, and in order to ensure the compression power of the compressor, the volume of the cylinder is usually made larger. Therefore, the pressure in the compression chamber The pressure will drop significantly, the lubricating oil will evaporate more easily, and substances such as PET will be more likely to be precipitated on the side of the cylinder bore in the suction reed and valve plate, resulting in damage to the sealing of the exhaust reed and poor compression And other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Fig. 1 is a cross-sectional view of a refrigerant compressor in Embodiment 1 of the present invention, Fig. 2 is an enlarged schematic diagram of part A in Fig. 1 , and Fig. 3 is a schematic diagram of friction coefficient characteristics under different lubricating oil viscosities, Fig. 4 is a schematic diagram of compressor efficiency characteristics under different lubricating oil viscosities.

[0050] In Fig. 1, the interior of the sealed casing 101 is filled with a refrigerant gas 102 composed of R600a, and at the same time, lubricating oil composed of mineral oil 103 with a VG of 5 is stored at the bottom, and the boiling point is 350°C or higher. The volume ratio is 10% to 30%, and the volume ratio of components with a boiling point of 300°C or lower is 50% to 70%. In addition, a motor mechanism 106 composed of a stator 104 and a rotor 105 and a reciprocating compression mechanism 107 driven by the motor mechanism 106 are installed in the sealed housing 101 .

...

Embodiment 2

[0081] Fig. 5 is a schematic diagram of the refrigerant compressor in this embodiment, Fig. 6 is an enlarged schematic diagram of part A in Fig. 5, Fig. 7 is a sectional view of B-B in Fig. 5, and Fig. 8 is a schematic diagram of some important structures in Fig. 7 The schematic diagram is enlarged, and Fig. 9 is a graph showing the extraction characteristics of oligomers under different lubricating oil viscosities.

[0082] As shown in FIGS. 5-8 , lubricating oil 202 is stored in the sealed case 201 , and these lubricating oils 202 are composed of a single mineral oil with substantially the same evaporation temperature, and its viscosity is V65. Meanwhile, a compression mechanism 203 used as a compression component and a distributed winding induction motor 204 used as an electric mechanism to drive the compression mechanism 203 are also provided in the sealed casing 201 . In addition, the refrigerant used is R600a.

[0083] The motor 204 is wound with a main winding 205 thro...

Embodiment 3

[0099] Fig. 10 is a schematic diagram of the refrigerant compressor in this embodiment, Fig. 11 is an enlarged schematic diagram of part C in Fig. 10, Fig. 12 is a D-D sectional view of Fig. 10, and Fig. 13 is a diagram of some important structures in Fig. 12 Zoom in on the schematic.

[0100] As shown in Fig. 10 and Fig. 11, a lubricating oil 302 with a viscosity of VG8, which is composed of a single mineral oil with substantially the same evaporation temperature, is stored in the sealed housing 301, and a compression mechanism 303 is also provided to drive the compression mechanism. 303 of the electric motor 304 . The motor 304 is a concentrated winding frequency converter motor. The refrigerant used is R600a.

[0101] In the motor 304, the main winding 305 through which current supplied from a commercial power source (not shown) through a power supply circuit (not shown) flows is wound so as to pass between adjacent coil slots 307 (Fig. 12). The insulator 333 is inserte...

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Abstract

The present invention provides a refrigerant compressor which may assure excellent reliability while using low-viscosity refrigerant. The refrigerant compressor is characterized in that the viscosity of oil stored in hermetic container ranges from VG3 to VG8, and the boiling component at 350 C or over is not less than 10% and not higher than 30% in volume ratio, and the boiling component at 300 C or less is not less than 50% and not higher than 70% in volume ratio. Accordingly, the input reduction at sliding surfaces can be realized, and the lubricant is evaporated, therefore it is possible to prevent defective compression caused by PET (polyethylene phthalate) or the like deposited on the surfaces of the discharge reed and the like, and to enhance the efficiency and reliability.

Description

technical field [0001] The present invention relates to a refrigerant compressor used in refrigerators, air conditioners, freezers and the like. Background technique [0002] In recent years, from the perspective of protecting the earth's environment, people have been continuously improving the existing refrigerant compressors in order to develop a high-efficiency refrigerant compressor that can reduce the use of fossil fuels. Among them, In particular, great efforts have been made to reduce the viscosity of lubricants so as to reduce sliding loss (for examples, see Japanese Patent Laid-Open No. 2000-297753 and Japanese Laid-Open Patent Publication No. Hei 10-204458). [0003] The existing reciprocating compressor will be described below with reference to the accompanying drawings. [0004] Fig. 14 is a sectional view of a hermetic electric refrigerant compressor in the prior art. FIG. 15 is an enlarged view of part E in FIG. 14 . The bottom of the sealed case 1 stores lu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B27/08F04B35/04C10M161/00
Inventor 川端淳太明石浩业横田和宏
Owner PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
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