Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1990-01-25
1991-10-22
Smith, Leonard E.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
417299, 417310, F04B 4900
Patent
active
050590987
ABSTRACT:
In a scroll type of compressor having a stationary scroll, a movable scroll opposed to the stationary scroll and rotatable thereabout but not rotatable about its own axis, so that a closed chamber which decreases in volume during the rotation of the movable scroll is defined by and between the stationary scroll and the movable scroll, and an introduction passage through which a coolant is introduced into the compressor, wherein a capacity varying apparatus comprises a suction restriction mechanism provided in the introduction passage to control the cross sectional area thereof in accordance with the pressure of the coolant, a by-pass passage extending through the stationary scroll to connect the portion of the closed chamber connected to start ends of scroll portions provided on the movable and stationary scrolls, while being reduced in volume, to suction pressure area in the compressor, a by-pass opening and closing mechanism provided in the by-pass passage to open and close the latter in accordance with the pressure of the coolant, and a control valve actuated in accordance with the pressure of the coolant before being restricted, to control the operation of the suction restriction mechanism and the by-pass opening and closing mechanism.
REFERENCES:
patent: 4431388 (1984-02-01), Eber
patent: 4642034 (1987-02-01), Terauchi
patent: 4886425 (1989-12-01), Itahana
Ban Takashi
Fukanuma Tetsuhiko
Suzuki Shin'ichi
Yoshida Tetsuo
Basichas Alfred
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Smith Leonard E.
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