Darui Electric recommends
Air heater is an electric heating device that mainly heats gas flow. The inner cavity of the air heater is equipped with multiple baffles (guide plates) to guide the gas flow direction and prolong the residence time of the gas in the cavity, thereby fully heating the gas, making the gas heating uniform, and improving heat exchange efficiency. The heating element of the air heater is a stainless steel heating tube, which is made by inserting electric heating wire into a seamless steel tube, filling the gaps with magnesium oxide powder that has good thermal conductivity and insulation, and then shrinking the tube. When current passes through the high-temperature resistance wire, the generated heat diffuses to the surface of the heating tube through crystalline magnesium oxide powder, and then transfers to the heated gas to achieve the purpose of heating.
Application scope of air heater: Air heater is a widely used heater, commonly called air heater. In fact, it can be subdivided into many types according to different heated air, all of which can be called duct-type air heaters. The control part of the electric heater is a precision instrument, so it should be handled with care during transportation, and impact and collision are strictly prohibited. The cylinder part should be properly hoisted to avoid deformation and damage to the internal heating elements. The air heater and control cabinet should be placed in the warehouse and strictly protected from rain.
Working principle of air heater: High-temperature resistance wires are evenly distributed inside a high-temperature resistant stainless steel seamless tube, and the gaps are densely filled with crystalline magnesium oxide powder with good thermal conductivity and insulation. This structure is not only advanced and has high thermal efficiency, but also heats evenly. When current passes through the high-temperature resistance wire, the generated heat diffuses to the surface of the metal tube through crystalline magnesium oxide powder, and then transfers to the heated part or air gas to achieve the purpose of heating.
The air heater is mainly used to heat the required gas flow from the initial temperature to the required gas temperature. It is especially suitable for automatic temperature control and large flow high-temperature combined systems and accessory tests. The air heater has a wide range of applications and can heat any gas. The generated hot gas is dry, non-conductive, non-flammable, non-explosive, non-corrosive, reliable, and the heated space heats up quickly (controllable).
Technical features of air heater 1. Fast heating and cooling rate, up to 10°C/s, fast and stable adjustment. There will be no lead or lag in the controlled gas temperature, causing temperature control drift, making it very suitable for automatic control.
2. High efficiency.
3. Good mechanical performance: Because its heating element is made of alloy material, under the impact of high-pressure gas flow, its mechanical performance and strength are better than any other heating element, which is more advantageous for systems and accessory tests that require continuous heating of gas for a long time.
4. Can heat gas to very high temperatures.
5. Durable when used in accordance with operating procedures.
6. Clean gas, small size.
7. Multiple types of air electric heaters can be designed according to user needs.
8. Outlet temperature and flow rate controllable, variable frequency speed regulation.
9. Single unit power from 2KW to 2000KW series.
Common faults and maintenance of air heater: Fault 1: Digital display meter does not work. Check whether the air switch is closed and the control circuit is intact.
Fault 2: Heater temperature does not rise. Check whether the fuse is intact and whether the air heater is damaged.
Fault 3: Three-phase imbalance. Check whether the three-phase incoming voltage is missing a phase. Open the air heater protective cover and use a multimeter to check whether a single electric heating element is open circuit. For faults that cannot be resolved by yourself, please consult a skilled technician (or consult our company's customer service staff).
(Air heater products can be customized according to customer requirements, providing drawings, voltage, power, dimensions)
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
