Heat insulating structure in piston type compressor

Inactive Publication Date: 2005-06-30
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the temperature is higher, the density of the refrigerant gas in the compression chamber is lower, so that the performance of the compressor deteriorates.
Therefore, if the temperature of the wall substantially rises or the wall has high heat conductivity, the temperature of the refrigerant gas in the compression chamber substantially rises before compression, and the performance of the compression deteriorates.

Method used

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  • Heat insulating structure in piston type compressor
  • Heat insulating structure in piston type compressor
  • Heat insulating structure in piston type compressor

Examples

Experimental program
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Embodiment Construction

[0021] A first preferred embodiment will be described with reference to FIGS. 1 through 5, in which the present invention is applied to a piston type variable displacement compressor.

[0022] As shown in FIG. 1, the housing of a piston type variable displacement compressor 10 includes a cylinder block 11 of aluminum, a front housing 12 of aluminum and a rear housing or cover housing 13 of aluminum. The front housing 12 is joined to the front end of the cylinder block 11, and the rear housing 13 is joined to the rear end of the cylinder block 11 through a valve plate 14 and gasket type valve forming plates 15, 16. The cylinder block 11, the front housing 12 and the rear housing 13 are combined by a screw 53. As shown in FIGS. 4 and 5, the valve forming plate 15 includes a metallic plate 152 and rubber layers 153, 154 that are respectively provided on the surfaces of the metallic plate 152. In a similar manner, the valve forming plate 16 includes a metallic plate 162 and rubber layers ...

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Abstract

A heat insulating structure in a piston type compressor includes a heat insulating member. The piston type compressor includes a cylinder block and a cover housing connected to the cylinder block, a piston is accommodated in a cylinder bore defined in the cylinder block to define a compression chamber. A suction pressure region and a discharge pressure region are defined in the cover housing. The piston is reciprocated in the cylinder bore in accordance with rotation of a rotary shaft so that refrigerant gas is drawn from the suction pressure region to the compression chamber and discharged from the compression chamber to the discharge pressure region. The heat insulating member has a predetermined shape and is located in the cylinder block. The heat insulating member has an inner peripheral surface that defines the cylinder bore.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a heat insulating structure in a piston type compressor, in which a piston is reciprocated in accordance with the rotation of a rotary shaft to draw refrigerant gas from a suction pressure region to a compression chamber as well as to discharge the refrigerant gas from the compression chamber to a discharge pressure chamber. [0002] In a piston type compressor (cf. Unexamined Japanese Patent Application Publication No. 2001-515174), refrigerant gas is introduced into a compression chamber. The temperature of the introduced refrigerant gas in the compression chamber affects the performance of the compressor. As the temperature is higher, the density of the refrigerant gas in the compression chamber is lower, so that the performance of the compressor deteriorates. On the other hand, as the temperature is lower, the density of the refrigerant gas in the compression chamber is higher, so that the performance of the compr...

Claims

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Application Information

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IPC IPC(8): F04B27/08F04B27/10F04B39/06F04B53/08F04B53/16
CPCF04B27/1045F04B39/06F04B53/166F04B53/168
InventorENOKIJIMA, FUMINOBUOTA, MASAKIFUKANUMA, TETSUHIKOMURASE, MASAKAZU
OwnerTOYOTA IND CORP