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:
Jul. 19, 2022
Filed:
Oct. 12, 2018
Applicant:
Mitsubishi Heavy Industries Thermal Systems, Ltd., Tokyo, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25B 31/00 (2006.01); F25B 49/02 (2006.01); F04B 49/02 (2006.01); F04B 39/02 (2006.01); F25B 1/053 (2006.01);
U.S. Cl.
CPC ...
F25B 31/004 (2013.01); F04B 49/02 (2013.01); F25B 1/053 (2013.01); F25B 49/022 (2013.01); F04B 39/0207 (2013.01); F25B 2500/16 (2013.01); F25B 2500/26 (2013.01); F25B 2600/23 (2013.01);
Abstract
In order to reduce the effect on a compressor caused by foaming in an oil tank, a control unit for controlling an oil pump starts the oil pump before a compressor is started (SA), starts the compressor (SA) when an oil supply differential pressure P satisfies a compressor startup condition during a reference time Tas from the starting of the oil pump ('Yes' in SA), and extends the operation of the oil pump for a prescribed time without starting the compressor (Step SA) when the compressor startup condition is not satisfied ('No' in SA).