Title:
REFRIGERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/085330
Kind Code:
A1
Abstract:
In this invention, an air-conditioning device comprises a refrigerant circuit, a suction temperature sensor, and a control unit. The refrigerant circuit is configured by a compressor, a radiator, an expansion valve, an evaporator, and an accumulator being connected in this order. The control unit controls the rotational speed of the compressor and the opening degree of the expansion valve. Upon determining, on the basis of the detection result of the suction temperature sensor, that a refrigerant and lubricating oil are separated inside the accumulator, the control unit performs control for step (S3) for reducing the rotational speed of the compressor and also performs control for step (S4) for setting the opening degree of the expansion valve to a predetermined opening degree.
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Inventors:
TOMIYAMA YOU
Application Number:
PCT/JP2020/039918
Publication Date:
May 06, 2021
Filing Date:
October 23, 2020
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B43/00; F25B1/00; F25B43/02; F25B49/02
Domestic Patent References:
| WO2019087401A1 | 2019-05-09 |
Foreign References:
| JP2000018739A | 2000-01-18 | |||
| JP2015092123A | 2015-05-14 | |||
| JP2002221369A | 2002-08-09 | |||
| JP2013228115A | 2013-11-07 | |||
| JPH0921569A | 1997-01-21 | |||
| JP2016211774A | 2016-12-15 |
Other References:
See also references of EP 4053477A4
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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