Working principle and motor type of automatic induction hand dryer scheme development

Working principle and motor type of automatic induction hand dryer scheme development

This paper introduces the working principle of the scheme development of automatic induction hand dryer; It is usually detected by sensors (i.e. hands). After this signal, the heating relay and the blowing circuit relay are controlled to start heating and blowing. When the signal detected by the sensor disappears, the contact is disconnected, the relay of heating circuit and blowing circuit is disconnected, and the heating and blowing stop.

Automatic induction hand dryer

principle

1. As the name suggests, there is no heating device

It is suitable for places with higher temperature requirements and frequent use of dry mobile phones, such as the packaging workshop of quick-frozen vegetables and quick-frozen dumplings;

2. PTC heating

PTC thermistor heating, because PTC heating power will change with the change of ambient temperature. In winter, the heating power of PTC will increase, and the temperature of warm air generated by hand dryer will also increase, which is energy-saving and environment-friendly;

PTC is characterized by good temperature constancy, but it also has some disadvantages, that is, the temperature of electric heating wire will not rise rapidly;

3. Electric heating wire heating

When the traditional electric heating wire is heated, the wind temperature rises rapidly, but the wind temperature is not constant, the wind temperature is easy to rise, and the opponent may burn;

The high-speed hand dryer adopts the control method of electric heating wire, CPU and temperature sensor to realize the effect of rapid and constant wind temperature rise. Even if the wind speed is as high as 100 m / s, the hand dryer can blow out constant hot air;

Generally, the noise of air assisted dryers is relatively large, while the noise of hot air dryers with heat as the main body is relatively small. Enterprises can choose according to their actual situation.

Automatic induction hand dryer

Motor type

It is one of the core components of automatic induction high-speed dry phone, in the form of capacitor asynchronous motor, shadow pole motor, series motor, DC motor and permanent magnet motor. The dryer driven by capacitor asynchronous motor, shaded pole motor and DC motor has the advantage of low noise, while the automatic induction high-speed dryer driven by series motor and permanent magnet motor has the advantage of large air volume.