Abstract: A ceiling-mounted air conditioning indoor unit for a heat pump including a refrigerant circuit, the ceiling-mounted air conditioning indoor unit includes: a casing including an air inlet and an air outlet; a drain pan in a bottom portion of the casing; 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. The drain pan includes a first rim and a second rim.

Abstract: A ceiling-mounted air conditioning indoor unit for a heat pump including a refrigerant circuit, the ceiling-mounted air conditioning indoor unit includes: a casing including an air inlet and an air outlet; a drain pan in a bottom portion of the casing; 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. The drain pan includes a first rim and a second rim.