Title:
多段空気圧縮機
Document Type and Number:
Japanese Patent JP7353248
Kind Code:
B2
Abstract:
To provide a multi-stage air compressor which continues operating without stopping operation even when an intermediate pressure of the multi-stage air compressor becomes a predetermined value or more.SOLUTION: In a multi-stage air compressor, air passages of a low pressure stage compressor body and a high pressure stage compressor body are connected in series, and the low pressure stage compressor body and the high pressure stage compressor body are pipe-connected by first air piping. The multi-stage air compressor comprises a pressure detector connected in the middle of the first air piping, first air release piping branched from the middle of the first air piping, a first air release solenoid valve provided in the first air release piping, and a control device which is inputted with a pressure value detected by pressure detector and controls the first air release solenoid valve. When the pressure detected by the pressure detector becomes a predetermined pressure or more, the control device issues an open command to the first air release solenoid valve to control the first air release solenoid valve so as to discharge a part of compressed air compressed by the low pressure stage compressor body to the outside air.SELECTED DRAWING: Figure 1
Inventors:
Naoyuki Shiraishi
Masakatsu Okaya
Kohei Sakai
Masakatsu Okaya
Kohei Sakai
Application Number:
JP2020136847A
Publication Date:
September 29, 2023
Filing Date:
August 13, 2020
Export Citation:
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd.
International Classes:
F04B49/06; F04B41/06
Domestic Patent References:
| JP62040290U | ||||
| JP2013253572A | ||||
| JP2001123963A | ||||
| JP2003343448A |
Attorney, Agent or Firm:
Seiryo Patent Attorneys Corporation
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