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:
May. 28, 2024
Filed:
Mar. 24, 2020
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD., Tokyo, JP;
Abstract
A gas compressor includes a compressor main body, an electric motor that supplies driving force to the compressor main body, a power conversion device, a plurality of air release valves disposed in a plurality of air release systems communicating with a discharge piping system to discharge the compressed gas to an atmospheric pressure environment, and a controller. The gas compressor performing an unload operation of reducing, when a discharge pressure reaches a predetermined pressure, a load on the compressor main body by opening one of the air release valves. The gas compressor including the plurality air release systems for each of which the air release value is disposed, and a plurality of pressure regulating valves provided on a downstream side of each air release valve, respectively, wherein the controller selects one of the air release valves and performs the unload operation.