The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 1995
Filed:
Apr. 04, 1994
Applicant:
Inventors:
Warren F Bessler, Schenectady, NY (US);
Frank J Bowden, Latham, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B / ; F25B / ;
U.S. Cl.
CPC ...
62223 ; 62211 ; 25112905 ;
Abstract
A system including a control circuit and a sensing circuit controls an expansion valve in a refrigeration system using pulse width modulation. The control circuit includes a ramp generator, a pulse width modulator, and a power switch. In response to input from the sensing circuit, the control circuit produces a control signal which cyclically opens and closes the valve. The average flow rate through the valve is varied in accordance with a condition of the refrigeration system which is detected by the sensing circuit.