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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 12235028 B1

PDFFull Text
Date of Patent:
Feb. 25, 2025

Filed:

Mar. 08, 2022

Refrigerant leakage determination system

Applicant:

Daikin Industries, Ltd., Osaka, JP;

Inventor:

Manabu Yoshimi, Osaka, JP;

Assignee:

DAIKIN INDUSTRIES, LTD., Osaka, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jonathan Bradford

Int. Cl.
CPC ...
F24F 11/36 (2018.01); F24F 11/38 (2018.01); F25B 40/00 (2006.01); F25B 43/00 (2006.01); F25B 49/00 (2006.01); F25B 49/02 (2006.01); F25B 13/00 (2006.01); F25B 40/02 (2006.01);
U.S. Cl.
CPC ...
F25B 49/02 (2013.01); F24F 11/38 (2018.01); F25B 40/00 (2013.01); F25B 43/006 (2013.01); F25B 49/005 (2013.01); F24F 11/36 (2018.01); F25B 13/00 (2013.01); F25B 40/02 (2013.01); F25B 2313/0233 (2013.01); F25B 2400/13 (2013.01); F25B 2500/222 (2013.01); F25B 2700/04 (2013.01); F25B 2700/1931 (2013.01); F25B 2700/2106 (2013.01); F25B 2700/21151 (2013.01); F25B 2700/21152 (2013.01); F25B 2700/2116 (2013.01); F25B 2700/21163 (2013.01); F25B 2700/21174 (2013.01); F25B 2700/21175 (2013.01);
Abstract

A refrigerant leakage determination system includes a refrigerant circuit including a compressor, a condenser, an expansion mechanism, and an evaporator. The system performs a first determination, and a second determination. The first determination determines that refrigerant has leaked from the refrigerant circuit, by using a first state amount of refrigerant as a determination index, the first state amount including at least one of an outlet temperature of the condenser, a suction temperature of the compressor, and a discharge temperature of the compressor. The second determination determines that refrigerant has leaked from the refrigerant circuit, based on information different from the first state amount.

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