Patent ID: 7174733

Claim:
A vehicular air-conditioner provided with: a refrigeration cycle ( 2 ) provided with an electric compressor ( 3 ) provided with a compression mechanism ( 5 ) for sucking in and compressing a refrigerant, an electric motor ( 4 ) for driving said compression mechanism, and a motor drive device ( 6 ) for controlling and driving said electric motor and arranged enabling cooling by said refrigerant and heat exchange means ( 7 , 11 ) for heat exchange between the air and said refrigerant; blowing means ( 8 , 14 ) for blowing said air into said heat exchange means; and an air-conditioning controller ( 20 ) for giving to said motor drive device a speed command value for instructing a speed of said electric motor or the stopping; said electric motor operating in an overheat protection mode where it operates by a heat protection speed set separate from said speed command value and sucks in and compresses said refrigerant when said motor drive device is in the overheated state so as to cool said motor drive device by said refrigerant; said air-conditioning controller setting said blowing means to an operating state when operating in said overheat protection mode when said blowing means is stopped.