Title:
COMPRESSOR UNIT FOR CRYOGENIC REFRIGERATOR, AND CRYOPUMP SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/147179
Kind Code:
A1
Abstract:
Provided is a compressor unit comprising: a flow control valve for controlling the flow rate of a bypass piping in accordance with a valve command signal; a compressor inverter (170); and a compressor controller (168). The range of values from which an operating frequency can be obtained is limited in advance to a first operating frequency segment from a lower limit value up to a first value, and a second operating frequency segment from a second value up to an upper limit value, with an unused frequency segment from the first value to the second value including the natural frequency of a compressor structure section. The compressor controller (168) determines an inverter command signal such that the operating frequency is set to the second operating frequency segment if a target flow rate is between a first discharge flow rate and a second discharge flow rate, and determines a valve command signal so that the flow rate of the bypass piping is matched to a differential flow rate obtained by subtracting the target flow rate from a discharge flow rate of a compressor body obtained in accordance with the inverter command signal.
More Like This:
| JPS6143981 | [Title of the device] Clio pumping plant |
| WO/2018/147180 | CRYOPUMP |
Inventors:
OGAWA TOMOHIRO (JP)
KIMURA TOSHIYUKI (JP)
KIMURA TOSHIYUKI (JP)
Application Number:
PCT/JP2018/003571
Publication Date:
August 16, 2018
Filing Date:
February 02, 2018
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
International Classes:
F04B37/08; F04B37/16; F04B49/06; F25B1/00; F25B9/00
Foreign References:
| JP2013134020A | 2013-07-08 | |||
| JP2007028737A | 2007-02-01 | |||
| JPS60133273A | 1985-07-16 |
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
Download PDF: