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. 29, 2021
Filed:
Apr. 16, 2018
Hitachi, Ltd., Tokyo, JP;
Masanao Kotani, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides an oil feed type air compressor that can reduce a power consumption of a compressor body during an unload operation. The oil feed type air compressor includes: a compressor body () compressing air while feeding an oil into a compression chamber; a separator () disposed on a discharge side of the compressor body; a compressed air-feeding system () feeding the compressed air separated by the separator to a use destination of the compressed air; an oil-feeding system () feeding the oil separated by the separator to the compression chamber of the compressor body; an oil cooler () and a temperature sensor () disposed in the oil-feeding system; and a controller enabling execution of a temperature control. The temperature control by the controller is performed by variably controlling a rotation speed of a cooling fan () such that, during the load operation, a temperature detected by the temperature sensor is a target value T, and during the unload operation, the temperature detected by the temperature sensor is a target value T(with the proviso of T>T).