| 摘要 |
PROBLEM TO BE SOLVED: To reduce an electric power consumption and constrain the variety of temperature of cooling water to prevent the generation of dewing on a motor by a method wherein the driving of the motor is controlled based on a difference between a motor temperature and an outdoor air temperature when the supplying operation of drinks is not effected. SOLUTION: An energization control circuit 18 controls the excitation of a power supply unit 14 so that temperature signals inputted from a bearing temperature sensor 15 and a motor temperature sensor 16 become higher than an outdoor air temperature when drinks are not sold or the stopping time of the supplying operation of the same. The temperatures of the bearing unit of a mixing motor 13 and the side surface of a case are detected to detect a temperature difference between an outdoor air temperature outputted from an outdoor air temperature sensor 17. When temperature signals, inputted from the bearing temperature sensor 15 or the motor temperature sensor 16 become lower than the outdoor air temperature, the energization control circuit 18 outputs a power supply signal to the power supply unit 14 to turn a propeller12 by the mixing motor 13 for a predetermined energization period of time. According to this method, cooling water is mixed and the temperature of the mixing motor is raised whereby the condensation can be prevented.
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