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.:

US 9568224 B1

PDF
Full Text
Expired
Date of Patent:
Feb. 14, 2017

Filed:

Sep. 11, 2013
Applicant:

Mitsubishi Electric Corporation, Tokyo, JP;

Inventor:

Shinichi Uchino, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25B 5/04 (2006.01); F25B 30/02 (2006.01); F25B 13/00 (2006.01); F25B 49/00 (2006.01); F24D 3/18 (2006.01);
U.S. Cl.
CPC ...
F25B 30/02 (2013.01); F25B 5/04 (2013.01); F25B 13/00 (2013.01); F25B 49/005 (2013.01); F24D 3/18 (2013.01); F25B 2339/047 (2013.01); F25B 2400/0409 (2013.01); F25B 2500/28 (2013.01);
Abstract

It is an object to prevent a liquid refrigerant from being drawn into a compressor. A heat pump apparatus includes a refrigerant circuit in which a refrigerant circulates, and which is configured by sequentially connecting a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and a third heat exchanger, and connecting a bypass flow path bypassing the third heat exchanger between the second heat exchanger and the compressor. The heat pump apparatus also includes a water circuit in which water circulates, and which is configured by sequentially connecting the third heat exchanger, the first heat exchanger, and a tank. In the heat pump apparatus, if there is a risk of the liquid refrigerant being drawn into the compressor, a three-way valve is controlled such that the refrigerant flows through the third heat exchanger to be heated by water and evaporated.


Find Patent Forward Citations

Uchino, Shinichi. (2017). Heat pump water heater apparatus and heating and defrost operation, thereof (U.S. Patent No. 9568224). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9568224

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