Variable capacity vapor compression cooling system

Details Variable capacity vapor compression cooling system Variable capacity vapor compression cooling system

1996-01-05

1998-07-07

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

4182012, F25B 4100, F01C 116

Patent

active

057751170

ABSTRACT:
A helical-screw rotary compressor having a twin rotor configuration or a multi-rotor (i.e., at least three) configuration with defined compressor induction and discharge ends has at least one unloader piston disposed at said compressor discharge end with an economizer injection port therein. The unloader pistons being opened and closed in fine discrete steps by microprocessor controlled stepping motors which drive linear actuators.

REFERENCES:
patent: 203477 (1878-12-01), Kimio et al.
patent: 4799865 (1989-01-01), Oscarsson
patent: 4946362 (1990-08-01), Soderlund et al.

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