Title:
LIQUID RING PUMP CONTROL
Document Type and Number:
WIPO Patent Application WO/2020/082285
Kind Code:
A1
Abstract:
A system comprising: a liquid ring pump (10) comprising a chamber (102) and an impeller (106) mounted within the chamber (102); a driver configured to drive the liquid ring pump (10) so as to cause the impeller (106) to move within the chamber (102); and a controller (20) configured to, responsive to determining that a speed of the impeller (106) relative to the chamber (102) is below a threshold speed or is zero, control the driver to drive the liquid ring pump (10) so as to cause the impeller (106) to move within the chamber (102).
Inventors:
DE BOCK ANDRIES (CN)
COECKELBERGS JOERI (DE)
DAI XIN (CN)
COECKELBERGS JOERI (DE)
DAI XIN (CN)
Application Number:
PCT/CN2018/111808
Publication Date:
April 30, 2020
Filing Date:
October 25, 2018
Export Citation:
Assignee:
EDWARDS TECH VACUUM ENGINEERING QINGDAO CO LTD (CN)
International Classes:
F04C19/00; F04D5/00
Foreign References:
| CN107356365A | 2017-11-17 | |||
| CN104066994A | 2014-09-24 | |||
| CN1103454A | 1995-06-07 | |||
| US20010026759A1 | 2001-10-04 | |||
| US4655688A | 1987-04-07 | |||
| DE4036516A1 | 1991-05-23 | |||
| EP0943805A1 | 1999-09-22 |
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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