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Reciprocating compressor and manufacturing method thereof

Inactive Publication Date: 2006-02-02
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021] Therefore, an object of the present invention is to provide a reciprocating compressor which can be easily manufactured by simplifying a manufacturing process of a stator, and which can prevent abrasion of a piston and a cylinder by preventing deformation of the cylinder by an inner stator, and a manufacturing method thereof.

Problems solved by technology

However, it is difficult to stack the thin stator cores 32a, 32b and 32c in the radial direction, which results in the high production cost.
Furthermore, since the stator cores 32a, 32b and 32c are formed sheet by sheet, the size control is difficult.

Method used

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  • Reciprocating compressor and manufacturing method thereof
  • Reciprocating compressor and manufacturing method thereof
  • Reciprocating compressor and manufacturing method thereof

Examples

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third embodiment

[0048] On the other hand, the inner stator 110 and the cylinder 120 can be individually manufactured by sintering magnetic metal powder or another metal powder, and bonded to each other by diffusion bonding. FIG. 7 is a cross-sectional diagram illustrating an inner stator and a cylinder of a reciprocating compressor in accordance with the present invention. As depicted in FIG. 7, the inner stator 110 and the cylinder 120 are individually manufactured, and the inner stator 110 is inserted onto the outer circumference of the cylinder 120.

[0049] The manufacturing method of the present invention will now be explained.

[0050] Generally, when magnetic metal powder is heated at a high temperature, the bonding strength of particles is improved to increase abrasion resistance. However, when the magnetic metal powder is heated at a high temperature over 500° C. in the sintering process, the magnetic metal powder may be demagnetized. It is thus very important to perform the sintering process w...

second embodiment

[0054]FIG. 9 is a block diagram illustrating the manufacturing method of the reciprocating compressor in accordance with the present invention.

[0055] As illustrated in FIG. 9, the inner stator 110 and the cylinder 120 are temporarily formed in a single form by supplying primary metal powder and secondary metal powder to a predetermined shape of die. The outside portion of the temporary product composing the inner stator 110 is heated and primarily sintered at a temperature of about 400° C., and the inside portion of the temporary product composing the cylinder 120 is locally heated and secondarily sintered at a temperature of about 1000° C. As a result, the inner stator 110 and the cylinder 120 are manufactured in a single form.

[0056]FIG. 10 is a block diagram illustrating the manufacturing method of the reciprocating compressor in accordance with the third embodiment of the present invention.

[0057] Referring to FIG. 10, the inner stator 110 and the cylinder 120 are temporarily fo...

fourth embodiment

[0058]FIG. 11 is a block diagram illustrating the manufacturing method of the reciprocating compressor in accordance with the present invention.

[0059] As shown in FIG. 11, the inner stator 110 and the cylinder 120 are individually manufactured by supplying primary metal powder and secondary metal powder to different dies, and heating and sintering the primary metal powder and the secondary metal powder at a necessary temperature for the inner stator 110 (about 400° C.) and a necessary temperature for the cylinder 120 (about 1000° C.), respectively. Thereafter, the inner stator 110 is bonded onto the outer circumference of the cylinder 120 by diffusion bonding.

[0060] As another example, although not illustrated, the inner stator 110 and the cylinder 120 are formed in a predetermined shape of die by using magnetic metal powder, and heated and sintered at a necessary temperature for the inner stator 110 (about 400° C.). An abrasion resistance coating surface can be formed on the inner...

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Abstract

The present invention discloses a reciprocating compressor and a manufacturing method thereof. The reciprocating compressor includes a frame installed in a casing, an outer stator having a winding coil and being fixed to the frame, an inner stator disposed in the outer stator with a predetermined gap, and sintered by a powder metallurgy process using metal powder, a rotor having a permanent magnet between the outer stator and the inner stator, a cylinder disposed inside the inner stator of the reciprocating motor for forming a compression chamber, and sintered by a powder metallurgy process using metal powder, a piston slidably inserted into the inner circumference of the cylinder, for sucking and compressing gas by linear reciprocation, and a plurality of resonance springs for elastically supporting the connection part of the piston and the rotor, and inducing resonance of the piston. Accordingly, the cylinder is not deformed by the inner stator, and thus abrasion of the piston and the cylinder by deformation of the cylinder is prevented in advance. Moreover, the reciprocating compressor is easily manufactured by considerably simplifying the manufacturing process.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a reciprocating compressor, and more particularly to, a reciprocating compressor which can be easily manufactured by a simplified manufacturing process, and which can prevent abrasion of a piston and a cylinder by deformation of the cylinder, and a manufacturing method thereof. [0003] 2. Description of the Background Art [0004] In general, a compressor, that is a major component for refrigeration and air conditioning of an air conditioner, a refrigerator, etc., has been widely used in various industrial fields. The compressors are classified into rotary compressors, scroll compressors and reciprocating compressors according to a compression mechanism for compressing refrigerants. [0005] In the reciprocating compressor, a piston linearly reciprocates in a cylinder to suck, compress and discharge gas. Normally, when only the linear motion is necessary, the reciprocating compressor perf...

Claims

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Application Information

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IPC IPC(8): F04B35/04F04B17/04
CPCF04B35/045B22F3/10B22F5/106B22F2203/11B22F2301/00F04B39/12F05B2230/22H02K1/12H02K1/34H02K3/22H02K33/16
Inventor KIM, DONG-HAN
Owner LG ELECTRONICS INC
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