Title:
REFRIGERATION MACHINE CONTROL DEVICE, TURBO REFRIGERATION MACHINE, REFRIGERATION MACHINE CONTROL METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2018/180337
Kind Code:
A1
Abstract:
A refrigeration machine control device according to an embodiment of the present invention serves to control a turbo refrigeration machine, and is equipped with a pressure reduction rate identification unit for identifying a pressure reduction rate at which foaming does not occur in an oil tank, and a pressure adjustment unit for adjusting the pressure of an evaporator on the basis of the identified pressure reduction rate. The pressure reduction rate identification unit is equipped with: a refrigerant precipitation gas volume calculation unit for calculating the volume of refrigerant gas precipitated from lubricating oil when the pressure is reduced at a prescribed pressure reduction rate; and a determination unit for determining whether foaming is permissible, on the basis of a comparison between the calculated volume and the volume according to the surface of the oil in the oil tank.
Inventors:
TOGANO YOSHIE (JP)
HASEGAWA YASUSHI (JP)
SUEMITSU RYOSUKE (JP)
HASEGAWA YASUSHI (JP)
SUEMITSU RYOSUKE (JP)
Application Number:
PCT/JP2018/008983
Publication Date:
October 04, 2018
Filing Date:
March 08, 2018
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B1/053; F04D27/00; F04D29/063
Foreign References:
US4404811A | 1983-09-20 | |||
JP2009186030A | 2009-08-20 | |||
JPS4844425B1 | 1973-12-25 | |||
JPS54112646U | 1979-08-08 | |||
JPS60114659A | 1985-06-21 | |||
JPH0387897U | 1991-09-06 | |||
JPH07218010A | 1995-08-18 | |||
JPS4533710Y | ||||
JP2015094560A | 2015-05-18 | |||
JP2016033348A | 2016-03-10 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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