Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/110131
Kind Code:
A1
Abstract:
This refrigeration cycle device is provided with: an electric compressor (11) which compresses and discharges a refrigerant; a heating heat exchanger (12) which uses high-pressure refrigerant discharged from the electric compressor as a heat source, and heats a fluid; decompression devices (15a, 15b) which decompress the refrigerant flowing out from the heating heat exchanger; evaporators (16, 18) which evaporate the refrigerant decompressed by the decompression devices; and a rotational frequency control unit (40a) which controls the rotational frequency of the electric compressor. The rotational frequency control unit reduces the upper limit value (NcUL) of the rotational frequency of the electric compressor, in accordance with an increase in the pressure ratio (Pc/Ps) of the high pressure-side refrigerant pressure (Pc) of the refrigerant in a range spanning from a discharge port side of the electric compressor to inlet sides of the decompression devices, to the low pressure-side refrigerant pressure (Ps) of the refrigerant in a range spanning from outlet sides of the decompression devices to an intake port of the electric compressor.
Inventors:
TADA KAZUHIRO (JP)
MARUYAMA KENICHI (JP)
NOMURA FUJIO (JP)
MARUYAMA KENICHI (JP)
NOMURA FUJIO (JP)
Application Number:
PCT/JP2017/039649
Publication Date:
June 21, 2018
Filing Date:
November 02, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
B60H1/22; B60H1/32; F25B1/00; F25B47/02
Foreign References:
| JP2011245894A | 2011-12-08 | |||
| JP2011246083A | 2011-12-08 | |||
| JP2013056624A | 2013-03-28 |
Attorney, Agent or Firm:
JIN Shunji (JP)
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