| 摘要 |
The present invention is directed to a control apparatus for an electric circuit of an automobile air conditioning system. The control apparatus includes a power transistor (31) varying a value of electric power, which is supplied to a motor(12), so as to vary a rotation speed of the motor in response to demand. The motor drives a compressor (11) of a refrigerant circuit in order to control the drive of the compressor in response to change in the rotational speed thereof. The power transistor is fixed to an exterior surface of an evaporator (250) which is the coolest element of the refrigerant circuit in order so as to be cooled thereby. Thus, an excessive rise in temperature of the power transistor is prevented without either stagnating the flow of air in a duct which conducts the air from the evaporator to a passenger compartment or causing complicated assemby of the refrigerant circuit. |
