Title:
CONTROLLER, REFRIGERANT CIRCUIT SYSTEM, CONTROL METHOD AND PROGRAM
Document Type and Number:
Japanese Patent JP2018059663
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a controller configured to perform control of returning a proper amount of refrigerant oil to a compressor according to an operation condition.SOLUTION: A refrigerant circuit includes: a compressor configured to compress refrigerant; an oil separator configured to separate refrigerant oil contained in refrigerant discharged from the compressor, from the refrigerant; an oil returning pipe configured to return the separated refrigerant oil to the compressor; and a flow control valve provided in the oil returning pipe. In the refrigerant circuit, a controller includes a valve opening control unit configured to control valve opening of the flow control valve, based on a target returning flow rate of the refrigerant oil that must be returned to the compressor, and pressure difference between discharge side pressure and suction side pressure of the compressor.SELECTED DRAWING: Figure 2
Inventors:
MAENO MASASHI
Application Number:
JP2016197346A
Publication Date:
April 12, 2018
Filing Date:
October 05, 2016
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD
International Classes:
F25B1/00; F25B43/02
Attorney, Agent or Firm:
Ryuichiro Mori
Masatake Shiga
Tadashi Takahashi
Tetsuo Yamazaki
Yasushi Matsunuma
Masatake Shiga
Tadashi Takahashi
Tetsuo Yamazaki
Yasushi Matsunuma
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