Title:
TWO-STAGE PRESSURE BUILDUP REFRIGERATION CYCLE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2016/035302
Kind Code:
A1
Abstract:
Provided is a two-stage pressure buildup refrigeration cycle apparatus that comprises: a lower-stage compressor (1); a higher-stage compressor (2); a condenser (3); a main expansion valve (9); a sub expansion value (5); an evaporator (10); a condenser fan (3f); and a control device (7). When the demand for refrigeration performance is low, the control device controls the lower-stage compressor and the higher-stage compressor in a COP improvement operation mode in which, on the basis of the refrigerant discharge performance of either of the lower-stage compressor and the higher-stage compressor, the control device determines the refrigerant discharge performance of the other of the lower-stage compressor and the higher-stage compressor in order to improve COP. When the demand for refrigeration performance is high, the control device controls the lower-stage compressor and the higher-stage compressor in a high performance operation mode in which the control device first increases the refrigerant discharge rate of the lower-stage compressor, and then increases the refrigerant discharge rate of the higher-stage compressor.
Inventors:
KURODA YASUTAKA (JP)
Application Number:
PCT/JP2015/004365
Publication Date:
March 10, 2016
Filing Date:
August 28, 2015
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F25B1/10; F25B1/00
Domestic Patent References:
| WO2012004987A1 | 2012-01-12 |
Foreign References:
| JP2006258397A | 2006-09-28 | |||
| JP2008249184A | 2008-10-16 | |||
| JP2006213345A | 2006-08-17 | |||
| JPS61173060A | 1986-08-04 | |||
| JPH1096548A | 1998-04-14 | |||
| JP2012073021A | 2012-04-12 |
Attorney, Agent or Firm:
KIN, Junhi (JP)
Gold Junki (JP)
Gold Junki (JP)
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