Temperature control through pulse width modulation

Details Temperature control through pulse width modulation Temperature control through pulse width modulation

2008-12-09

2011-12-27

Jiang, Chen Wen (Department: 3784)

Refrigeration

Automatic control

Refrigeration producer

C062S228100, C062S228300, C417S310000, C418S201200

Reexamination Certificate

active

08082747

ABSTRACT:
A refrigerant compressor assembly for a refrigeration circuit controls the temperature within a temperature controlled space. The refrigerant compressor assembly includes a first unloading valve, a first valve actuator, and a first valve control system that adjusts the first valve actuator via a pulse-width-modulated signal, a second unloading valve, a second valve actuator, and a second valve control system that adjusts the second valve actuator via a pulse-width-modulated signal. The refrigerant compressor assembly also includes a third unloading valve. The first valve actuator is coupled to the first and third unloading valves and controlled by the first valve control system. The unloading valves selectively allow or resist fluid flow from higher to lower pressure areas within the refrigerant compressor assembly.

REFERENCES:
patent: 3151806 (1964-10-01), Whitfield
patent: 3224662 (1965-12-01), Oldberg
patent: 3936239 (1976-02-01), Shaw
patent: 4102150 (1978-07-01), Kountz
patent: 4453900 (1984-06-01), Schibbye et al.
patent: 4538421 (1985-09-01), Kawamoto
patent: 6120255 (2000-09-01), Schumann et al.
patent: 6422846 (2002-07-01), Zhong et al.
patent: 6494699 (2002-12-01), Sjoholm et al.
patent: 6718781 (2004-04-01), Freund et al.
patent: 6745584 (2004-06-01), Pham et al.
patent: 6925823 (2005-08-01), Lifson et al.
patent: 6984114 (2006-01-01), Zili et al.
patent: RE40257 (2008-04-01), Doepker et al.
patent: 2003/0033823 (2003-02-01), Pham et al.
patent: 2006/0045752 (2006-03-01), Beckman
patent: 2008/0314055 (2008-12-01), Lifson
patent: 1171291 (1969-11-01), None
patent: 10281534 (1998-10-01), None
Sjoholm, Lars, Variable Volume-Ratio and Capacity Control in Twin-Screw Compressors, Purdue Compressor Technology conference, 1996.

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