Title:
REFRIGERATION CYCLE DEVICE AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2020/008916
Kind Code:
A1
Abstract:
Provided is a refrigeration cycle device and a method for controlling same with which, for a refrigeration circuit that uses a non-azeotropic refrigerant, it is possible to limit reductions in evaporator inlet temperatures due to temperature slip while limiting costs. A refrigeration cycle device (1) comprises a refrigerant circuit (10) in which a non-azeotropic refrigerant flows, and a control unit (20) that controls components constituting the refrigerant circuit (10). The refrigerant circuit (10) has: a low-stage compressor (11) and a high-stage compressor (12) that are connected in series and that compress the refrigerant; a first heat exchanger (13) and a second heat exchanger (14); a first pressure reduction unit (15); and an intermediate pressure injection unit (30) that supplies an intermediate pressure refrigerant, wherein the pressure on refrigerant that has undergone a condensation process has been reduced, to the high-stage compressor (12). The control unit (20) controls the rotation speed of the low-stage compressor (11) and the high-stage compressor (12) on the basis of an index indicating the evaporator inlet temperature or when set to a designated mode to control reductions in the evaporator inlet temperature.
Inventors:
KATSURAYAMA YOHEI (JP)
AKATSUKA KEI (JP)
KUROIWA TORU (JP)
AKATSUKA KEI (JP)
KUROIWA TORU (JP)
Application Number:
PCT/JP2019/024744
Publication Date:
January 09, 2020
Filing Date:
June 21, 2019
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B1/00; F25B1/10; F25B13/00; F25B49/02
Foreign References:
| JP2001272121A | 2001-10-05 | |||
| JPH07294029A | 1995-11-10 | |||
| JP2009222357A | 2009-10-01 |
Other References:
See also references of EP 3819556A4
Attorney, Agent or Firm:
OBA, Mitsuru et al. (JP)
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