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:
Mar. 14, 2023
Filed:
Jan. 27, 2017
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Zhijia Ren, Tokyo, JP;
Yoshiyuki Kanemoto, Tokyo, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide a scroll compressor with a simple configuration which is capable of preventing the occurrence of noise induced due to compressed air remaining in a discharge pipe flow backward and an orbiting scroll rotating reversely when stopping the compressor. To this end, there is provided a scroll compressor including a scroll type compressor body provided with an orbiting scroll and a fixed scroll; a motor that drives the compressor body; an inverter that drives the motor; a discharge pipe that connects a discharge port of the compressor body to an air tank storing air compressed by the compressor body; and a check valve that shuts off the compressed air flowing backward from the air tank in the discharge pipe, in which, when stopping the compressor body, the inverter controls a rotational speed of the motor driving the compressor body, in two steps at a first deceleration and a second deceleration lower than the first deceleration, from when a stop command is output until the compressor body stops.