Method and apparatus for controlling capacity of a multiple-stag

Details Method and apparatus for controlling capacity of a multiple-stag Method and apparatus for controlling capacity of a multiple-stag

1990-08-23

1991-11-26

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

622284, 184 61, 417 13, F25B 3100, F04B 4910

Patent

active

050673262

ABSTRACT:
A refrigeration system is provided with a compressor whose speed is varied to provide load control. In order to prevent compressor damage is lubricating oil pressure sensing control is provided which generates a compressor speed increase signal whenever the oil pressure drops below a predetermined minumum.

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