Duct electric heater induction heating uses the thermal effect of induced current (eddy current) generated when a conductor is in an alternating electromagnetic field to heat the conductor itself. According to different heating process requirements, the AC power frequency used for induction heating includes power frequency (50-60 Hz), intermediate frequency, and high frequency (above 10000 Hz).
Power frequency power supply is the AC power commonly used in industry. The power frequency in most countries around the world is 50 Hz. The voltage applied to the induction device from the power frequency power supply used for induction heating must be adjustable. Depending on the power of the heating equipment and the capacity of the power supply grid, a high-voltage power supply (6-10 kV) can be used through a transformer, or the heating equipment can be directly connected to a 380 V low-voltage grid.
During the electric heating production operation, we sometimes find that the equipment in operation may produce an odor after a period of use. The main reason is that scale forms after the explosion-proof electric heater has been used for a while. The scale, when heated at high temperatures, produces a certain odor. Moreover, the scale not only reduces the heating performance of the electric heater but also may cause unnecessary harm to the human body if used for a long time. Therefore, cleaning the explosion-proof electric heater becomes extremely important. However, the water tank of the electric heater is large, and the cleaning port has limited accessibility. So if the inner tank of the explosion-proof electric heater is made of enamel material, the magnesium rod needs to be replaced frequently, typically every one to two years. The explosion-proof electric heater is a structure widely used in industrial applications, commonly for heating chemical substances, and also in places requiring explosion-proof measures. The working principle of the explosion-proof electric heater mainly uses energy conversion to achieve heating.
(1) Ensure that the explosion-proof electric heater and the explosion-proof junction box are reliably grounded.
(2) If there is no medium flowing in the explosion-proof electric heater, it must not be operated, otherwise it will burn out the heater.
(3) If the explosion-proof electric heater is to be stopped for a long time, all circuits should be disconnected and the power supply cut off.
(4) If parameters need to be changed, it must be done by professional technical personnel; others are not allowed to change them arbitrarily.
(5) After the explosion-proof electric heater stops working, it should be allowed to cool down for three to five minutes to prepare for normal use next time.
