Abstract: When the temperatures of outdoor heat exchangers 23a and 23b detected by outdoor heat exchanger temperature sensors 57a and 57b become equal to or higher than 5 degrees C. and the sucking superheating degrees of compressors 21a and 21b become equal to or lower than 0 degrees C. while an air conditioning apparatus 1 is performing the reverse defrosting operation, the reverse defrosting operation is stopped and the heating dominant operation is resumed. At this time, the total operating times of the compressors 21a and 21b are reset. The sucking superheating degrees of the compressors 21a and 21b are obtained by subtracting the low pressure saturation temperatures calculated from the sucking pressures of the compressors 21a and 21b, from the temperatures of the refrigerants sucked into the compressors 21a and 21b which temperatures are detected by the sucking temperature sensors 54a and 54b.

Abstract: An electric motor is provided with a rotator and a stator 110 disposed on an outer diameter side of the rotator. The stator 110 includes a cylindrical stator iron core 50 provided with a plurality of teeth 62 radially projecting from an inner circumferential side of an annular yoke 61 toward a center, insulators 40 made of an insulation material disposed on both ends of the stator iron core 50 in an axial direction, and lead wire wound around the teeth 62 via the insulators 40. First grooves 31 to 39 disposed on an inner circumferential side of the insulator 40 and second grooves 51 to 59 disposed on an inner circumferential side of the stator iron core are formed to communicate with each other. A part of a connection line connecting the windings with each other is embedded in the first grooves and the second grooves.