Working principle of hot air heater
The hot air heater consists of a blower, a heater, and a control circuit. The working principle is as follows: After the power is turned on, the blower blows air into the heater, so that the air passes evenly from the inside and outside of the spiral heating wire. The heat is exchanged with the passing cold air, and the air temperature at the air outlet is increased. The K-type thermocouple at the air outlet timely feeds the detected air temperature to the temperature controller. The meter monitors the actual temperature of the work according to the set temperature, and transmits the relevant information back to the solid-state relay to control whether the heater works.