US 12,235,028 B2
Refrigerant leakage determination system
Manabu Yoshimi, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Mar. 8, 2022, as Appl. No. 17/689,739.
Application 17/689,739 is a continuation of application No. PCT/JP2020/033810, filed on Sep. 7, 2020.
Claims priority of application No. 2019-163492 (JP), filed on Sep. 9, 2019.
Prior Publication US 2022/0187000 A1, Jun. 16, 2022
Int. Cl. F24F 11/36 (2018.01); F24F 11/38 (2018.01); F25B 40/00 (2006.01); F25B 43/00 (2006.01); F25B 49/00 (2006.01); F25B 49/02 (2006.01); F25B 13/00 (2006.01); F25B 40/02 (2006.01)
CPC F25B 49/02 (2013.01) [F24F 11/38 (2018.01); F25B 40/00 (2013.01); F25B 43/006 (2013.01); F25B 49/005 (2013.01); F24F 11/36 (2018.01); F25B 13/00 (2013.01); F25B 40/02 (2013.01); F25B 2313/0233 (2013.01); F25B 2400/13 (2013.01); F25B 2500/222 (2013.01); F25B 2700/04 (2013.01); F25B 2700/1931 (2013.01); F25B 2700/2106 (2013.01); F25B 2700/21151 (2013.01); F25B 2700/21152 (2013.01); F25B 2700/2116 (2013.01); F25B 2700/21163 (2013.01); F25B 2700/21174 (2013.01); F25B 2700/21175 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A refrigerant leakage determination system comprising:
a refrigerant circuit including a compressor, a condenser, an expansion mechanism, and an evaporator; and
an external server, the external server being external to the refrigerant circuit, wherein
the external server is configured to perform a first determination that determines that refrigerant has leaked from the refrigerant circuit, by using a first state amount of refrigerant as a determination index, the first state amount including at least one of an outlet temperature of the condenser, a suction temperature of the compressor, and a discharge temperature of the compressor, and
the external server is configured to perform a second determination that determines that refrigerant has leaked from the refrigerant circuit, based on information different from the first state amount, wherein
the refrigerant leakage determination system further comprises a condenser outlet temperature sensor that measures the outlet temperature of the condenser, and
the second determination detects, by using a value of the condenser outlet temperature sensor, whether the condenser outlet temperature sensor has a failure, to determine that refrigerant has leaked.