Title:
REFRIGERANT CIRCUIT SYSTEM AND METHOD FOR CONTROLLING REFRIGERANT CIRCUIT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/110185
Kind Code:
A1
Abstract:
Provided is a refrigerant circuit system with which it is possible to promote overcooling while adequately controlling the compressor temperature. The refrigerant circuit system (1) is provided with: a gas-liquid heat exchanger (20) for exchanging heat between a high-pressure refrigerant and a low-pressure refrigerant; a bypass path (21) for diverting the high-pressure refrigerant upstream of a decompression unit (151); a bypass valve (22) capable of adjusting the flow rate; and a control unit (25) for issuing a command corresponding to the flow rate to the bypass valve (22). The control unit (25) determines the ratio of increase/decrease from the current point in time of the flow rate of the high-pressure refrigerant to be channeled into the bypass path (21) on the basis of Δh'/Δh, when: h1 is the discharge enthalpy, which is enthalpy corresponding to the sensed temperature of the discharged refrigerant; Δh is the enthalpy difference, which is the difference in enthalpy corresponding to the sensed refrigerant temperature at the inlet and outlet of the gas-liquid heat exchanger (20); hv is the target discharge enthalpy corresponding to the target temperature Tv allowable for the compressor (14); and Δh' is the compatible enthalpy difference compatible with the target discharge enthalpy hv on the basis of h1 and Δh.
Inventors:
NAKANISHI MICHIAKI (JP)
Application Number:
PCT/JP2017/040965
Publication Date:
June 21, 2018
Filing Date:
November 14, 2017
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B1/00; F24F11/84; F25B13/00
Foreign References:
| JP2015152262A | 2015-08-24 | |||
| JP2010002109A | 2010-01-07 | |||
| JP2008121977A | 2008-05-29 | |||
| JP2011043273A | 2011-03-03 | |||
| JP2003214713A | 2003-07-30 | |||
| JPH09105560A | 1997-04-22 | |||
| JP2002349977A | 2002-12-04 | |||
| DE102014222849A1 | 2016-05-12 | |||
| JPH1068553A | 1998-03-10 |
Other References:
See also references of EP 3460357A4
Attorney, Agent or Firm:
OBA, Mitsuru et al. (JP)
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