Compressor pulse width modulation

Details Compressor pulse width modulation Compressor pulse width modulation

2008-04-22

2008-04-22

Freay, Charles G. (Department: 3746)

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

C417S440000, C417S299000, C062S228500

Reissue Patent

active

RE040257

ABSTRACT:
A scroll compressor includes a capacity modulation system. The capacity modulation system has a piston that is connected to the non-orbiting scroll that disengages the non-orbiting scroll from the orbiting scroll when a pressure chamber is placed in communication with the suction chamber of the compressor. The non-orbiting scroll member moves into engagement with the orbiting scroll when the chamber is placed in communication with the discharge chamber. The engagement between the two scrolls is broken when the pressure chamber is placed in communication with fluid from the suction chamber. A solenoid valve controls the communication between the pressure chamber and the suction chamber. By operating the valve in a pulsed width modulated mode, the capacity of the compressor can be infinitely varied between zero and one hundred percent.

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European Search Report for Application No. EP 00 30 8176; May 3, 2002; 4 Pages.

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