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Closed compressor

A compressor, closed technology, applied in liquid variable capacity machinery, rotary piston machinery, mechanical equipment, etc., can solve the problems of reduced interference, reduced reliability of fixation, and offset of drive motor position, etc. Achieve the effect of preventing deterioration of air gaps and improving reliability

Inactive Publication Date: 2004-05-19
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the cylinders of the above-mentioned compression parts are generally made of castings, there is a problem that the joint strength of the shell and the compression parts is not enough
That said, cast iron is poorly ductile and brittle
In addition, due to the residual stress during casting plus the residual stress during welding, cracks are prone to occur, and poor welding of castings is prone to occur during welding of castings.
[0005] In addition, because the drive motor is generally fixed in the housing by shrink fit, there are problems such as insufficient bonding strength between the drive motor and the housing.
That is to say, when the shell expands and deforms due to internal pressure, there is a problem of insufficient bonding strength due to the reduced interference between it and the drive motor
[0006] In particular, in the case of using a very high-pressure fluid such as carbon dioxide as the working fluid, the expansion deformation of the casing increases due to the internal pressure, causing problems such as disconnection of the weld of the compression part and displacement of the drive motor position etc., thus reducing the reliability of the fixation of the parts it accommodates

Method used

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Embodiment Construction

[0054] Embodiments of the present invention will be described in detail below with reference to the drawings.

[0055] The hermetic compressor 1 of this embodiment is a swing piston type rotary compressor. like figure 1 As shown, this hermetic compressor 1 accommodates in its shell 10: a compression component 20 for compressing refrigerant as a working fluid, a drive motor arranged on the top of the compression component 20, that is, a compressor motor 30 , forming a fully enclosed type, that is, the so-called high-pressure dome-shaped compressor. Also, this compressor uses, for example, carbon dioxide (CO 2 ), as a refrigerant, is connected to a refrigerant circuit (omitted in the figure) of a refrigerating cycle such as an air conditioner, and constitutes a compressor 1 that compresses the refrigerant to a pressure above its critical pressure. The high pressure of this refrigeration cycle is, for example, set at 13.7MPa.

[0056] The housing 10 is composed of a cylindric...

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PUM

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Abstract

A front head 23 of a cylinder 21 and a mounting plate 40 are fastened to each other for fixation. The mounting plate 40 is welded to a casing 10. The mounting plate 40 is formed of steel containing carbon at 2.0% or less. A stator core 34 of a compressor motor 30 is welded to the casing 10. This seal compressor is formed into a high-pressure dome type, and the super critical fluid is used as the operating fluid.

Description

technical field [0001] The present invention relates to hermetic compressors, and more particularly to hermetic compressors with measures to improve the reliability of securing the compression components within the housing of its drive motor. technical background [0002] Conventionally, for example, a hermetic compressor disclosed in JP-A-6-159274 has been known in which a compression member and a drive motor are housed in a welded casing. This kind of compressor has high reliability because the working fluid is not easy to leak when compressing the working fluid, and there is no problem such as the penetration of moisture. For example, it can be used in an air conditioner equipped with a refrigerant circuit of a refrigerating device . [0003] The compression part of the hermetic compressor described above has a structure for compressing a working fluid driven by a driving motor, for example, a cylinder and a piston. [0004] However, since the cylinders of the compressi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/00F04C18/32F04C18/332F04C23/00F04C23/02F04C29/02
CPCF04C23/008F04C18/332F04C2230/60Y10S417/902F04C18/328F04C2230/231F04C2240/805F04C18/356
Inventor 樋口顺英熊仓英二广内隆
Owner DAIKIN IND LTD