Variable capacity vapor compression cooling system

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

1998-09-14

2000-08-22

Wayner, William

Refrigeration

Automatic control

Refrigeration producer

622285, 417440, 4182012, F04B 2300, F01C 116

Patent

active

061053783

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. The unloader pistons being opened and closed in fine discrete steps by microprocessor controlled stepping motors which drive linear actuators

REFERENCES:
patent: 4799865 (1989-01-01), Oscarsson
patent: 4946362 (1990-08-01), Soderlund et al.
patent: 5775117 (1998-07-01), Shaw
patent: 5816055 (1998-10-01), Ohman

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