A simple analysis of the safe use of electric heater in air duct

The air channel type electric heater is mainly used for air heating specifications in the air duct. It is divided into three forms: low temperature, medium temperature and high temperature. The common thing is that the steel plate supports the electric heating tube to reduce the vibration of the electric heating tube, and the junction box is equipped with an over temperature control device. On the other hand except in control with over temperature protection, between the fan and the heater is still transport device, to ensure that the electric heater must start after the fan is started in a heater plus differential pressure device, to prevent machine fault, gas pressure passage heater generally should not exceed 0.3Kg/cm2, if you need more than pressure. Please use the circulation type electric heater; low temperature heater type gas heating temperature is less than 160 DEG C; medium temperature is less than 260 DEG C; high temperature does not exceed 500 degrees. The air channel type electric heater is used for the industrial air duct, the air conditioning duct and the industry air to increase the temperature of the output air through heating the air, and is generally inserted into the transverse opening of the air duct. According to the working temperature of the wind tunnel, it is divided into low temperature, moderate and moderate temperature, and the wind speed, the middle wind speed and the high wind speed are divided according to the wind speed in the air duct.

The air channel heater is a kind of equipment that is used more frequently in work and life, such as electric stove, electric iron, electric iron, electric heater, electric oven, etc., all belong to the electric heating equipment.

The resistance wire of the electric heater is made of nickel and chromium alloy, and the temperature is up to 800 degrees centigrade. Because the power of the electric heater is very large, the fire can happen at any time if the user ignores the safety. The cause of the electric heater fire is: first, put the electric heater on the combustible or put it near the combustible, and cause a fire in the long time baking at high temperature. The two is that the electric heater does not install the plug, directly inserts the wire head into the socket, so it is easy to cause a short circuit and a fire. Three, when the electric heater is leaving, the plug of the electric heater is not removed. The time is too long, which causes the electric heater to overheat and ignite the nearby combustibles and cause the fire. The four is the continuous use of the resistance wire after multiple repairs, which can cause the line overload and cause the fire.

The electric heater of the air duct is mainly used to heat the required air flow from the initial temperature to the required air temperature, up to 850 degrees centigrade. It has been widely used in many research and production laboratories, such as aeronautics and Astronautics, weapons industry, chemical industry and colleges and universities. It is especially suitable for automatic temperature control and high flow high temperature combined system and accessories test. The range of air electric heater is wide: it can heat any gas and generate hot air, no water, no electricity, no burning, no explosion, no chemical corrosion, no pollution, safe and reliable, and the heating space will be heated up quickly (controllable).

Characteristic：

The outer wound corrugated stainless steel belt is used in the electric heating tube, which increases the heat dissipation area and greatly improves the heat exchange efficiency.

The heater is designed reasonably, the wind resistance is small, the heating is uniform, and there is no high and low temperature dead angle.

Double protection, good safety performance. A thermostat and a fuse are installed on the heater, which can be used to control the air temperature of the air duct over mild and no wind.