US 12,130,033 B2
Ceiling-mounted air conditioning unit for a heat pump comprising a refrigerant circuit with a refrigerant leakage sensor
Lukas Kokes, Plzen (CZ); Adela Zdvoranova, Plzen (CZ); and Tomas Srail, Plzen (CZ)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP); and DAIKIN EUROPE N.V., Ostend (BE)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP); and DAIKIN EUROPE N.V., Ostend (BE)
Filed on Sep. 6, 2022, as Appl. No. 17/903,685.
Application 17/903,685 is a continuation of application No. PCT/JP2021/016412, filed on Apr. 23, 2021.
Claims priority of application No. 20171304 (EP), filed on Apr. 24, 2020.
Prior Publication US 2022/0412591 A1, Dec. 29, 2022
Int. Cl. F24F 11/36 (2018.01); F24F 1/00 (2019.01); F24F 1/0047 (2019.01); F24F 13/00 (2006.01); F24F 13/22 (2006.01); F25B 49/00 (2006.01)
CPC F24F 11/36 (2018.01) [F24F 1/0047 (2019.02); F24F 13/22 (2013.01); F25B 49/005 (2013.01); F25B 2500/222 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A ceiling-mounted air conditioning indoor unit for a heat pump comprising a refrigerant circuit, the ceiling-mounted air conditioning indoor unit comprising:
a casing comprising an air inlet and an air outlet;
a drain pan in a bottom portion of the casing, wherein the drain pan comprises a first rim and a second rim;
a heat exchanger in the refrigerant circuit that is disposed above the drain pan such that water dropping from the heat exchanger accumulates in the drain pan;
a fan in the casing that draws air in from the air inlet, through the heat exchanger, and out of the air outlet;
a bell mouth at the air inlet that guides the air drawn-in to the fan;
a refrigerant leakage detection sensor that detects refrigerant leaking from the refrigerant circuit, wherein
the refrigerant leakage detection sensor is disposed between an outer surface of the second rim and an inner surface of the bell mouth that faces the outer surface of the second rim.