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:
Oct. 20, 2015
Filed:
Sep. 16, 2010
Scott A. Munns, Onalaska, WI (US);
Ladislas T. Gbetoho, Nancy, FR;
Jean-michel M. Genay, Laneuvelotte, FR;
William B. Fox, Onalaska, WI (US);
George M. Singh, La Crosse, WI (US);
Scott A. Munns, Onalaska, WI (US);
Ladislas T. Gbetoho, Nancy, FR;
Jean-Michel M. Genay, Laneuvelotte, FR;
William B. Fox, Onalaska, WI (US);
George M. Singh, La Crosse, WI (US);
Trane International Inc., Piscataway, NJ (US);
Abstract
A heat pump includes a valve system that connects a receiver tank in fluid communication with an indoor heat exchanger, wherein the valve system, operating under a novel control scheme, works in conjunction with the receiver to control the heat pump's effective refrigerant charge. To avoid suction or discharge pressure faults and to help prevent slugs of liquid refrigerant from entering the heat pump's compressor as the heat pump switches between heating and cooling modes or switches between heating and defrost modes, the control scheme provides momentary periods of transition between those modes of operation. In some embodiments, the valve system comprises a check valve connected in parallel flow relationship with a two-position receiver valve, wherein the check valve has an appreciably higher flow coefficient than that of the receiver valve.