Strict requirements for the production of air duct electric heaters

Strict requirements for the production of air duct electric heaters

Air duct electric heaters are different from general electric heaters in both structure and function, and of course, the production of air duct electric heaters also has a series of strict requirements. The air duct electric heater mainly consists of two parts: the main body and the control system. The heating element uses stainless steel pipes as protective sleeves, and a series of materials such as high-temperature resistance alloy wire and crystalline magnesium oxide powder are placed inside, which are formed through compression process. The two-layer protection plan of the air duct electric heater ensures good safety performance during equipment operation.

The control part of the air duct electric heater is composed of advanced digital circuits, integrated circuit triggers, high backpressure thyristors, etc., completing an adjustable temperature measurement and constant temperature system to ensure the normal operation of the electric heater. Because corrugated stainless steel strips are used around the air duct electric heater, it can effectively increase the cooling area and greatly improve heat transfer efficiency. And the special planning of the heater makes the wind resistance very small, maintaining uniform heating without high cold corners. In addition, the installation of thermostats and fuses in the heater can be used to control the working temperature of air ducts, allowing for further expansion of the scale of air duct electric heaters.

In the production of air duct electric heater systems, welding is a very important step, as most of the system is transported by pipelines. Therefore, welding is used for the connection between pipelines and between pipelines, as well as between pipelines and other components, in addition to bolt connection. When welding, the flange should be welded to the pipe first, and then the two pipes should be connected by bolts. Because the pipes are filled with hot oil, the temperature and pressure are relatively high. The quality of welding directly affects the quality of the entire system. From this, it can be seen that welding is an important part of the production of air duct electric heaters. Welding is a process of agile heating and cooling in the air duct electric heater.

The air duct electric heater is constrained by the surrounding body of the workpiece and cannot freely expand or shrink in the welding area. After the workpiece cools down, welding stress or even deformation will occur in the welded part. The air duct electric heater consists of two parts: the main body and the control system. The heating element uses stainless steel pipes as protective sleeves, high-temperature resistance alloy wires, and crystalline magnesium oxide powder, which are formed through compression technology. The control part uses advanced digital circuits, integrated circuit triggers, high backpressure thyristors, and other components to form an adjustable temperature measurement and constant temperature system, ensuring the normal operation of the electric heater. Welding process is an indispensable step in the planning of thermal oil systems.

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