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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 12638222 B1

PDFFull Text
Date of Patent:
May. 26, 2026

Filed:

Mar. 24, 2023

Heat pump device

Applicant:

Fujitsu General Limited, Kanagawa, JP;

Inventors:

Masahiro Kondo, Kanagawa, JP;

Daiki Shimano, Kanagawa, JP;

Kazuki Suda, Kanagawa, JP;

Assignee:

FUJITSU GENERAL LIMITED, Kanagawa, JP;

Attorney:

Paratus Law Group, PLLC

Primary Examiner:

Jonathan Bradford

Int. Cl.
CPC ...
F24H 4/00 (2006.01); F24H 4/02 (2022.01); F24H 15/34 (2022.01); F24H 15/38 (2022.01); F25B 30/02 (2006.01); F25B 49/00 (2006.01); F25B 49/02 (2006.01);
U.S. Cl.
CPC ...
F25B 49/02 (2013.01); F24H 4/02 (2013.01); F24H 15/34 (2022.01); F24H 15/38 (2022.01); F25B 30/02 (2013.01); F25B 49/005 (2013.01); F25B 2339/047 (2013.01); F25B 2700/1931 (2013.01); F25B 2700/21161 (2013.01);
Abstract

A heat pump device includes a refrigerant circuit that includes a compressor, a water circuit, that includes a flow adjustor that adjusts a flow of the water, and a terminal that is connected to the water circuit. The heat pump device includes a first detector that detects a condensing pressure of a refrigerant of the refrigerant circuit, a second detector that detects a discharged heated-water temperature that is a temperature of the water flowing into the terminal, and a controller that executes a protection operation of adjusting the condensing pressure of the refrigerant when the condensing pressure that is detected by the first detector exceeds a pressure threshold. The controller selects, as a subject of control in the protection operation, any one of the compressor and the flow adjustor based on the discharged heated-water temperature that is detected by the second detector.

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