To prevent occurrence of a failure of a device by preventing the internal temperature from exceeding a temperature at which the device failure occurs even under a situation where the inside of the device is opened in power OFF operation and then closed.

A control section 110 stops driving of a heat source 47 when a signal of power OFF occurs. When a door detection section 58 detects the opened state of an external door 57b, the control section 110 determines whether the temperature detected by temperature detecting sections 45a and 45b becomes a predetermined temperature or lower after a lapse of a predetermined time after it is detected by the door detection section 58 that the external door 57b comes from the opened state into the closed state. When it is determined that the detected temperature of the temperature detecting sections 45a and 45b becomes the predetermined temperature or lower, the control section 110 performs control for stopping the driving of a cooling section 46 to put the state into the power OFF state.