The working principle of hand washing dryer mainly includes the following aspects:
Sensor detection: Hand washing dryer is usually equipped with infrared proximity sensor. When the hand is placed within the detection range of the dryer, the sensor will detect the signal and start working.
Hot air drying: The dryer starts the heater through the heating circuit relay to generate hot air. These hot air blows to the hands through the air outlet, raising the temperature of the hands and accelerating the evaporation of water, thereby quickly drying the hands.
Automatic control: When the sensor detects that there is no object on the hand, the heating circuit and the blowing circuit relay are disconnected, and the heating and blowing are stopped.
In addition, the design of the hand washing dryer also includes some technical details and improvement measures:
Multi-directional air outlet: Some modern dryers use air guide devices to make the air outlet non-directional through the swing of the air guide blades to avoid excessively high skin temperature on the hands.
Sterilization technology: In order to reduce the spread of bacteria, some dryers are equipped with high-efficiency particulate air filters or ultraviolet sterilization technology to eliminate most of the bacteria in the air passing through the dryer.