Patent ID: 6983793

Claim:
A dual evaporator air conditioning system for use with a refrigerant for cooling air, said system comprising: a compressor for compressing and circulating the refrigerant; a primary air conditioning unit operable between cooling and non-cooling modes having a primary evaporator in fluid communication with said compressor for transferring heat from the air to the refrigerant to cool the air when in said cooling mode; an auxiliary air conditioning unit operable between cooling and non-cooling modes having an auxiliary evaporator m fluid communication with said compressor for transferring heat from the air to the refrigerant to cool the air when in said cooling mode; and a heater proximate said auxiliary evaporator and further including means for automatically heating the refrigerant in said auxiliary when said auxiliary air conditioning unit is in said non-cooling mode while said primary air conditioning unit is in said cooling mode to prevent accumulation of the refrigerant in said auxiliary evaporator.