Capacity control device for a screw compressor

Details Capacity control device for a screw compressor Capacity control device for a screw compressor

1985-10-15

1988-05-31

Vrablik, John J.

Pumps

With condition responsive pumped fluid control

Plural separate sensing means for a single fluid controller

417290, 417310, 418 14, 418195, F04B 4902, F04B 4908, F04C 2908

Patent

active

047477555

ABSTRACT:
A capacity control device for a screw compressor provided with a capacity control passage and a slide valve adjusting the opening thereof, wherein the slide valve is driven in a closing direction due to a pressure difference between a high pressure and a low pressure and is moved in an opening direction thanks to function of a spring when the high pressure is balanced with the low pressure, and when the pressure difference between the high pressure and low pressure is lower to cause the slide valve to be open thanks to the function of the spring, the slide valve is moved in the closing direction against the spring by use of pressure in a compression-processing part in the screw compressor, thereby enabling to quickly transit from no load condition to a loaded condition.

REFERENCES:
patent: 4342199 (1982-08-01), Shaw et al.
patent: 4534719 (1985-08-01), Zimmern

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