PRESSURE REGULATION DEVICE FOR SCROLL COMPRESSOR

Japanese Patent JP3398001

B2

PROBLEM TO BE SOLVED: To vary a compression ratio following the pressure fluctuation of refrigerant gas in a system and to suppress the occurrence of a transient pressure fluctuation by a method wherein a guide part communicated with a compression space is arranged at the central part of a fixed scroll and a spool member is slidably arranged at the guide part.
SOLUTION: A long with revolution of a moving scroll 2, the volume of a compression space 3 is gradually decreased and refrigerant gas is compressed to a high pressure. The compressed gas reaches a reservoir 26 through a discharge port 23 formed in the central part of a spool 19 and is discharged through the outlet pipe 28 at the upper part of a case 4. In this case, when a compression pressure is sufficiently high, the spool 19 is displaced upward against the force of a spring 20 by the pressure of refrigerant gas worked on the under surface of the spool 19 and a seal surface 22 is separated away from the seat part 17 of a fixed scroll 1, and refrigerant gas flows through a side passage between the spool 19 and the fixed scroll 1. This constitution causes a flow of refrigerant gas through a side passage togetherwith a discharge port 23 and is prevented from being brought into excessive compression.

Toshihiko Mitsunaga
Sugimoto Kazu
Kazuaki Fujiwara
Kazuya Sato
Toshiyuki Ehara

JP2283297A

April 21, 2003

February 05, 1997

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Sanyo Electric Co., Ltd.

F04C28/26; F04C18/02; F04C28/28; F04C29/12; (IPC1-7): F04C29/10; F04C18/02

JP59119080A
JP8247053A
JP5296174A
JP62251482A
JP5106567A
JP61234286A
JP368578U

Masamasa Shibano

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