Sensorless Control Method of Instant-Heating Module for a Bidet

D. Jung (Korea)


521-130 Power Electronics Application, Instant-Heating Module, Sensor-less Control, Bidet


In this paper, we propose the sensor-less control method for instant-heating module for a bidet, which can control water temperature effectively without using the flow velocity sensor of the flowing water. By monitoring the changes in outlet water temperature and analyzing them with the information of inlet water temperature and the switching command for Triac, we can estimate the value of the velocity of the flowing water. This information can be effectively acquired during cleaning operation of bidet system. Therefore, we can expect that the proposed method can be easily integrated with the previous low cost control schemes. To illustrate the validity of the proposed method, experimental works are done under various operating conditions.

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