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:
Aug. 25, 1992
Filed:
May. 14, 1991
Wayne R Reedy, Edwardsville, IL (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A heat pump system that includes a compressor, an outdoor heat exchanger and an indoor heat exchanger is provided with automatic refrigerant charge adjustment. A refrigerant reservoir has an inlet branch coupled to a liquid refrigerant line between the two heat exchangers and a discharge branch that is coupled to the suction line that feeds low pressure vapor to the compressor. Solenoid valves on the two branches are controlled by a thermostat that is in thermal contact with the discharge line from the compressor. If the discharge temperature is low, refrigerant liquid is transferred to the reservoir. If the discharge temperature is high, the refrigerant is injected into the suction gas.