Stainless Steel Hand Dryer works in general for the sensor detects the signal (hand), this signal is to see open heating circuit control relay and hair Relays, start heating, hairdryer. When the sensor detects a signal disappears, release contact, heating circuit and hair circuit relay off, stop heating, power hand dryer ，hairdryer. Have a heating device heating device, PTC, electric wire. Apply more stringent requirements for the temperature of the place, where stem cell phones use frequently, such as: frozen vegetables, frozen dumplings packaging workshop