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Hermetic compressor

a compressor and hermetic technology, applied in the direction of machines/engines, positive displacement liquid engines, lighting and heating apparatus, etc., can solve the problems of excessive compression, delay in closing, poor refrigeration, etc., and achieve the effect of less excessive compression, quick closing, and easy opening

Inactive Publication Date: 2009-01-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0025]According to the hermetic compressor of the present invention, the discharge valve unit provides an easy opening and a quick closing without delay by virtue of the two-stage springiness. The aforem

Problems solved by technology

However, in closing movement, discharge reed 25 has a delay in closing due to return at a slow speed.
This invites a backflow of high-pressure refrigerant 9 into compression chamber 11, thereby reducing substantial displacement volume by piston 21 and therefore resulting in poor refrigeration.
However, the larger springiness inconveniently invites an excessively compressed condition in opening movement due to the strengthened spring force.

Method used

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first exemplary embodiment

[0043]FIG. 1 is a section view of a hermetic compressor in accordance with a first exemplary embodiment of the present invention. FIG. 2 is a plan view of the hermetic compressor in accordance with the first exemplary embodiment. FIG. 3 is an exploded view of a discharge valve unit of the hermetic compressor in accordance with the first exemplary embodiment. FIG. 4 is a side section view of the discharge valve unit of the hermetic compressor at a middle stage of opening movement in accordance with the first exemplary embodiment. FIG. 5 is a side section view of the discharge valve unit of the hermetic compressor at a final stage of opening movement in accordance with the first exemplary embodiment. FIG. 6 shows spring characteristics of the discharge valve unit of the hermetic compressor in accordance with the first exemplary embodiment.

[0044]In FIGS. 1 through 6, hermetic container 101 has discharge pipe 102 and suction pipe 103 that are connected to a cooling system (not shown). H...

second exemplary embodiment

[0065]FIG. 7 is a section view of a hermetic compressor in accordance with a second exemplary embodiment of the present invention. FIG. 8 is a plan view of the hermetic compressor in accordance with the second exemplary embodiment. FIG. 9 is an exploded view of a discharge valve unit of the hermetic compressor in accordance with the second exemplary embodiment. FIG. 10 is a side section view of the discharge valve unit of the hermetic compressor at a middle stage of opening movement in accordance with the second exemplary embodiment. FIG. 11 is a side section view of the discharge valve unit of the hermetic compressor at a final stage of opening movement in accordance with the second exemplary embodiment. FIG. 12 shows spring characteristics of the discharge valve unit of the hermetic compressor in accordance with the second exemplary embodiment.

[0066]In FIGS. 7 through 12, hermetic container 201 has discharge pipe 202 and suction pipe 203 that are connected to a cooling system (not...

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Abstract

Stopper contains abutment section at a position that corresponds to arm section so as to keep a clearance from arm section of discharge reed. The structure above allows discharge reed to have two-stage spring characteristics; discharge reed exhibits a weaker springiness until arm section abuts against abutment section, and then exhibits a stronger springiness after the abutment. Employing the discharge reed having the two-stage characteristics allows discharge valve unit to easily open and quickly close without delay. Such structured hermetic compressor enhances energy efficiency, preventing degradation in refrigeration performance.

Description

TECHNICAL FIELD[0001]The present invention relates to improvement in a discharge valve unit of a hermetic compressor employed mainly for a refrigerating device.BACKGROUND ART[0002]Conventionally, some hermetic compressors contain a discharge valve unit that not only reduces noise in operation, but also improves energy efficiency by decreasing loss in opening and closing movements of a discharge reed. For example, Japanese Patent Unexamined Publication No. H10-318146 discloses a structure of the aforementioned compressors.[0003]A conventional hermetic compressor will be described hereinafter with reference to the accompanying drawings.[0004]FIG. 13 is a section view of a conventional hermetic compressor. FIG. 14 is a plan view of a conventional hermetic compressor. FIG. 15 is an exploded view of a discharge valve unit of a conventional hermetic compressor. FIG. 16 is a side section view of a discharge valve unit of a conventional hermetic compressor. FIG. 17 shows spring characterist...

Claims

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Application Information

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IPC IPC(8): F04B19/02
CPCF04B39/1073F04B39/1066F25B31/00F16K15/16F16F1/18Y10S251/902Y10S415/915Y10S417/902F25B41/20F05B2210/14F05B2210/12
Inventor YAMAOKA, MASAKAZUYAGI, AKIOMATSUMOTO, TSUYOSHI
Owner PANASONIC CORP