Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
GAS COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2019/189085
Kind Code:
A1
Abstract:
Provided is a technology which makes it possible, in a gas compressor that generates compressed gas of a set pressure by constant velocity control, to reduce more power during "unload operation control". This gas compressor is provided with: a compressor body; a drive source; an intake throttle valve; an air release valve; a rotation number conversion means; a pressure detection device for detecting ejection pressure; and a control device. The control device, when the relationship between an upper-limit pressure H and a lower-limit pressure L is H > L, performs at least one of: causing the drive source to operate at a full-speed rotation number with the intake throttle valve open and the air release valve closed, until the ejection pressure reaches H; and, when the ejection pressure has reached the pressure setting H, reducing the ejection pressure to within a predetermined range with the intake throttle valve closed and the air release valve open. The control device switches to a load operation when the ejection pressure has decreased to the lower-limit pressure L. The control device, when the ejection pressure has increased and reached the upper-limit pressure H, outputs to the rotation number conversion means a command for a rotation number smaller than the full-speed rotation number, and, when the ejection pressure has decreased and reached the lower-limit pressure L, outputs to the rotation number conversion means a command for the full-speed rotation number.

Inventors:
HASE Masakazu (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
TANAKA Hideharu (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
IYOZUMI Akira (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
TAKANO Masahiko (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
MORITA Kenji (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
YORIKANE Shigeyuki (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
NAKAJIMA Takashi (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
SAGAWA Yoshihiko (3, Kanda Neribei-cho, Chiyoda-k, Tokyo 22, 〒1010022, JP)
Application Number:
JP2019/012697
Publication Date:
October 03, 2019
Filing Date:
March 26, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD. (3 Kanda Neribei-cho, Chiyoda-ku Tokyo, 22, 〒1010022, JP)
International Classes:
F04C28/08; F04C18/16; F04C28/06
Foreign References:
JP2005016414A2005-01-20
JP2012002156A2012-01-05
Attorney, Agent or Firm:
TODA Yuji (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
Download PDF:



L, performs at least one of: causing the drive source to operate at a full-speed rotation number with the intake throttle valve open and the air release valve closed, until the ejection pressure reaches H; and, when the ejection pressure has reached the pressure setting H, reducing the ejection pressure to within a predetermined range with the intake throttle valve closed and the air release valve open. The control device switches to a load operation when the ejection pressure has decreased to the lower-limit pressure L. The control device, when the ejection pressure has increased and reached the upper-limit pressure H, outputs to the rotation number conversion means a command for a rotation number smaller than the full-speed rotation number, and, when the ejection pressure has decreased and reached the lower-limit pressure L, outputs to the rotation number conversion means a command for the full-speed rotation number."/>