Infrared diffuse reflection principle

The transmitter transmits a signal. When the hand reaches a certain distance under the hand dryer, the transmitted signal is reflected back to the receiving end, so that the hand dryer works. When the hand is left, no signal is reflected to the receiving end, and it stops working at this time Up. The advantage of this method is that it will not be disturbed by changes in the surrounding current, but the disadvantage is that it is easily disturbed by strong light.

Most dust-free aseptic hand washing and drying machines now use this induction method, typically most of the products of Panasonic, DIHOUR and Chi Damei

Principle of electromagnetic induction

When a conductive object (including the human body) moves in the inductor coil to generate a micro current, the micro current excites the back as a signal amplification, and the hand dryer will automatically run for a period of time (factory setting) after receiving this induction. The advantage of this induction method is that it will not be disturbed by strong light, but the disadvantage is that it is obviously affected by the surrounding current changes. There can be no other electrical appliances on the same line of the hand dryer, otherwise the opening type of other electrical appliances will affect the hand dryer. Commonly used hand dryers of this type are German Electric Bank and domestically produced snails.