Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1987-11-24
1989-07-11
Croyle, Carlton R.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
417440, F04B 4900
Patent
active
048466336
ABSTRACT:
A scroll-type compressor has a stationary scroll and a moving scroll which is orbitted about the center of the stationary scroll. A valve chamber, a first by-pass, and a second by-pass are formed in the end plate of the stationary scroll. The first by-pass communicates between the inside of the valve chamber and one of the compression chambers formed by the scrolls, and the second by-pass communicates between the inside of the valve chamber and the outside of the end plate of the stationary scroll. The valve chamber houses a plate-shaped valve which is moved by fluid pressure between a closed position, in which it blocks the by-passes, and an open position, in which working fluid can flow between the two by-passes. Working fluid at either discharge pressure or suction pressure can be introduced into the valve chamber to the rear of the valve through a connecting pipe which is connected to the valve chamber and a 3-way solenoid valve.
REFERENCES:
patent: 4065279 (1977-12-01), McCullough
patent: 4383805 (1983-05-01), Teegarden et al.
patent: 4496293 (1985-01-01), Nakamura et al.
patent: 4514150 (1985-04-01), Hiraga et al.
patent: 4564339 (1986-01-01), Nakamura et al.
patent: 4575320 (1986-03-01), Kobayashi et al.
Matsugi Tetsuzo
Nakamura Toshiyuki
Sugihara Masahiro
Suzuki Yasuyuki
Croyle Carlton R.
Mitsubishi Denki & Kabushiki Kaisha
Walnoha Leonard P.
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