Gas actuated slide valve in a screw compressor

Details Gas actuated slide valve in a screw compressor Gas actuated slide valve in a screw compressor

1996-12-11

1998-11-10

Vrablik, John J.

Refrigeration

Automatic control

Refrigeration producer

418 1, 4182012, 417310, 417440, F25B 4902, F04B 4902, F04C 1816, F04C 2910

Patent

active

058327371

ABSTRACT:
The position of a slide valve in a screw compressor in a refrigeration system is controlled using a gaseous medium sourced from two or more sources of such fluid, both of which are in open flow communication with the slide valve actuating piston when the slide valve load solenoid is open. Preferred gas sources are a closed compression pocket in the working chamber of the compressor and the discharge passage downstream of the compressor's working chamber. Gas at sufficiently high pressure is available whenever the compressor is operating to ensure that the compressor will load under all conditions within the compressor's operating envelope.

REFERENCES:
patent: 5063750 (1991-11-01), Englund

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