Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/244793
Kind Code:
A1
Abstract:
Provided is a refrigeration cycle device that is able to determine refrigerant leakage at high accuracy. An air conditioning device (100) comprises: a refrigerant circuit (10) in which a refrigerant circulates; sensors (31, 32, 33, 44) that measure a quantity representing the state of the refrigerant in the refrigerant circuit; and a control unit (51). The control unit executes a normal operation corresponding to an air conditioning load and a first sensing operation for sensing refrigerant leakage. The control unit adjusts a supercooling level at an opening of a condenser to a first value when executing the normal operation. On the basis of the measurement results of the sensors, the control unit detects a value pertaining to the discharge temperature of the compressor (21) or a value pertaining to an overheating level of an outlet of an evaporator. The control unit adjusts the supercooling level to a second value larger than the first value when executing the first sensing operation, and determines that the refrigerant has leaked from the refrigerant circuit when the value pertaining to the discharge temperature of the compressor or the value pertaining to the overheating level of the outlet of the evaporator is greater than or equal to a threshold.
Inventors:
MIURA SHU
NISHITANI KEISUKE
NISHITANI KEISUKE
Application Number:
PCT/JP2022/020612
Publication Date:
November 24, 2022
Filing Date:
May 18, 2022
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F24F11/36; F25B49/02
Foreign References:
| JP2016050680A | 2016-04-11 | |||
| JP2008249234A | 2008-10-16 | |||
| JP2019148396A | 2019-09-05 | |||
| JP2012007848A | 2012-01-12 | |||
| JP2008096051A | 2008-04-24 | |||
| JP2006023072A | 2006-01-26 |
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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