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:
Feb. 21, 2023
Filed:
Jul. 26, 2019
Applicant:
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Inventors:
Norio Aoyagi, Tokyo, JP;
Akihiro Yamamoto, Tokyo, JP;
Yoshiyuki Kanemoto, Tokyo, JP;
Hiroaki Saito, Tokyo, JP;
Fuminori Kato, Tokyo, JP;
Daichi Oka, Tokyo, JP;
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B 41/06 (2006.01); F04B 35/04 (2006.01); F04B 49/06 (2006.01); F04D 25/16 (2006.01); F04D 27/02 (2006.01); F04B 49/08 (2006.01); F04B 49/20 (2006.01); F25B 13/00 (2006.01); F25B 49/02 (2006.01); F25B 5/02 (2006.01); F04C 23/00 (2006.01); F04C 28/02 (2006.01); F04C 28/08 (2006.01); F04D 17/10 (2006.01); F04C 14/02 (2006.01);
U.S. Cl.
CPC ...
F04B 41/06 (2013.01); F04B 35/04 (2013.01); F04B 49/06 (2013.01); F04B 49/065 (2013.01); F04B 49/08 (2013.01); F04B 49/20 (2013.01); F04C 14/02 (2013.01); F04C 23/001 (2013.01); F04C 28/02 (2013.01); F04C 28/08 (2013.01); F04D 17/10 (2013.01); F04D 25/16 (2013.01); F04D 27/0261 (2013.01); F25B 5/02 (2013.01); F25B 13/00 (2013.01); F25B 49/022 (2013.01); F04B 2203/0209 (2013.01); F04B 2205/05 (2013.01); F04B 2205/063 (2013.01); F04C 2240/403 (2013.01); F04C 2240/81 (2013.01); F04C 2270/05 (2013.01); F25B 2400/075 (2013.01); F25B 2600/021 (2013.01); F25B 2600/0253 (2013.01); F25B 2700/1931 (2013.01);
Abstract
A gas compressor includes inverters, a plurality of compressor units and a control device for controlling each of the inverters. The control device increases the number of compressor bodies to be operated after confirming that the rotational speed of the operational motors will reach a steady value immediately after causing the number of the compressor bodies to be operated to increase.