Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/244098
Kind Code:
A1
Abstract:
This refrigeration cycle device comprises: an upstream circuit in which an upstream compressor, an upstream condenser, an upstream expansion valve, and an upstream flow path of a cascade heat exchanger are connected by piping to circulate an upstream refrigerant; a downstream circuit in which a downstream compressor, an intermediate cooler, a downstream flow path of the cascade heat exchanger, a downstream expansion valve, and a downstream evaporator are connected by piping to circulate a downstream refrigerant; and a control device that controls the operation of the upstream circuit and the downstream circuit. Upon determining that liquid refrigerant in a liquid state is flowing into the upstream compressor, the control device causes high-temperature, downstream refrigerant discharged from the downstream compressor to flow into the downstream flow path of the cascade heat exchanger.
Inventors:
ISHIKAWA TOMOTAKA (JP)
NISHIYAMA TAKUMI (JP)
ISHIHARA NOBUYA (JP)
YASHIRO TAKANORI (JP)
EGAMI MAKOTO (JP)
IUCHI HIROYA (JP)
NISHIYAMA TAKUMI (JP)
ISHIHARA NOBUYA (JP)
YASHIRO TAKANORI (JP)
EGAMI MAKOTO (JP)
IUCHI HIROYA (JP)
Application Number:
PCT/JP2021/018771
Publication Date:
November 24, 2022
Filing Date:
May 18, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B7/00; F25B1/00
Domestic Patent References:
| WO2018008053A1 | 2018-01-11 |
Foreign References:
| JP2012112617A | 2012-06-14 | |||
| JP2013213591A | 2013-10-17 | |||
| JP2012107805A | 2012-06-07 | |||
| JP2013148330A | 2013-08-01 | |||
| JP2012107805A | 2012-06-07 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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