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:
Sep. 29, 2026
Filed:
Jun. 26, 2023
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD., Tokyo, JP;
Abstract
To provide a packaged air-cooled air compressor capable of recommending cooler cleaning at the proper timing while controlling cost increase. The package-type, air-cooled air compressor has two cooling paths to the air-cooled cooler and motor, two cooling air intake ports where these cooling paths take in outside air, a fan and outlet that collectively exhaust cooling air after cooling the cooler and motor to the outside, and a bearing located at both ends of the motor shaft. The controller calculates the temperature difference between the bearings located upstream (anti-load side) and downstream (load side) of the motor shaft in the cooling air flow direction, and determines that the cooler is clogged if the temperature difference is less than a threshold value.