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:
Jun. 25, 2024
Filed:
Nov. 29, 2021
Applicant:
Daikin Industries, Ltd., Osaka, JP;
Inventors:
Assignee:
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25B 31/00 (2006.01);
U.S. Cl.
CPC ...
F25B 31/004 (2013.01); F25B 2500/16 (2013.01); F25B 2600/2515 (2013.01); F25B 2700/2105 (2013.01);
Abstract
A compressor () and an oil separator () are provided in a refrigerant circuit (). A flow-rate regulating valve () is provided in an oil return pipe () for returning a refrigerating-machine oil in the oil separator () to the compressor (). A temperature sensor () is provided downstream of the flow-rate regulating valve () in the oil return pipe (). The oil-amount determiner () determines whether an oil shortage state in which the amount of the refrigerating-machine oil held by the compressor () is insufficient is present, on the basis of a measured value obtained by the temperature sensor ().