The difference between an air electric heater and a compressed air electric heater is that an air electric heater can use either a duct-type electric heater or an air-duct electric heater, while a compressed air electric heater can only use a duct-type electric heater. The connection between an air electric heater and a compressed air electric heater is that both can use a duct-type electric heater.
Compressed air is air that has been compressed by external force. Air is compressible. After mechanical work is done by an air compressor to reduce its volume and increase its pressure, the air is called compressed air. Compressed air is an important power source. Compared with other energy sources, it has the following obvious characteristics: clear and transparent, easy to transport, no special harmful properties, no fire hazard, not afraid of overload, can work in many unfavorable environments, and air is available everywhere on the ground, inexhaustible.
The air electric heater is mainly used to heat the required air flow from the initial temperature to the required air temperature, up to a maximum of 850°C. It has been widely used in aerospace, weaponry, chemical industry, universities, and many other scientific research and production laboratories. It is especially suitable for automatic temperature control and high-flow high-temperature combined systems and accessory tests. The air electric heater has a wide range of applications: it can heat any gas, producing hot air that is dry, non-conductive, non-flammable, non-explosive, non-corrosive, non-polluting, safe and reliable, and the heated space heats up quickly (controllable).
The air-duct electric heater is mainly used for heating air in air ducts. It is available in three specifications: low temperature, medium temperature, and high temperature. A common structural feature is the use of steel plates to support the electric heating tubes to reduce vibration. The junction box is equipped with an overtemperature control device. In addition to overtemperature protection, an interlock device must be installed between the fan and the heater to ensure that the heater starts only after the fan starts. A differential pressure device should be installed before and after the heater to prevent fan failure. The gas pressure heated by the duct heater generally should not exceed 0.3 Kg/cm2. If the pressure exceeds this specification, please use a circulation-type electric heater. The maximum gas heating temperature for low-temperature heaters does not exceed 160°C; for medium-temperature heaters, it does not exceed 260°C; for high-temperature heaters, it does not exceed 500°C.
