In-car sensor equipped with aspirator fan motor

摘要

An object of the invention is to provide a low-cost in-car sensor equipped with an aspirator fan motor, which is capable of detecting temperature and humidity. A thermistor for detecting temperature and a humidity sensor are arranged at desired positions on a mounting board, and the temperature and humidity of air drawn from an air inlet port and exhausted from an air outlet port are detected. At the same time, the use of electronic circuit components forming a voltage regulator circuit and a filter circuit for coping with electromagnet interference which have been employed in a brushless motor drive circuit for the aspirator fan motor is shared by the humidity sensor. This makes it possible to reduce the number of electronic circuit components necessary for the humidity sensor, and provide a low-cost in-car sensor equipped with an aspirator fan motor, enabling construction of a more inexpensive automotive air conditioner.