详情描述

Duct heaters, also known as duct heaters or duct electric heaters, are devices specifically designed for heating air within ducts. Below is a detailed explanation:


I. Structure and Composition

The duct-type heater is mainly composed of the inner tube, multi-blade tubular electric heating elements, insulation layer, junction box, fan (optional), and control system, etc. Among them, the electric heating elements are the core components of the heater, powered by electricity.


The function generates heat, raising the air to the desired temperature. The insulating layer is used to reduce heat loss and improve heating efficiency.


II. Working Principle

The operation principle of the duct heater is relatively simple. When cold air blows through, it passes over an electric heating element to be heated. The heated air then collects temperature signals through the exhaust outlet, which are fed back to the control cabinet. Instruments on the control cabinet...


The table controls the heater's on/off operation based on the set target temperature to achieve the purpose of constant temperature control.


III. Technical Features

High heating temperature: Ducted heaters can heat air to very high temperatures, typically up to 450°C, and even as high as 850°C. At the same time, the housing temperature remains relatively low, usually around 50°C.

High heating efficiency: The wind-tunnel style heater boasts an extremely high heating efficiency, reaching over 0.9, thanks to advanced electric heating elements and an optimized heat exchange design.

Rapid heating and cooling rates: The ducted heater has both fast heating and cooling rates, with relatively stable adjustments. This makes it highly suitable for automatic control systems, allowing for precise air temperature control.

Excellent mechanical properties: The air duct heater, utilizing a special alloy material as the heating element, demonstrates good mechanical properties and strength under the impact of high-pressure air flow.

Long lifespan: The duct heater can last for decades as long as the operating procedures are not violated.

Air Purification: The heated air produced during the process is dry, free of moisture, non-conductive, non-flammable, non-explosive, non-corrosive, and pollution-free, ensuring safety and reliability.

Section 4: Application Fields

Duct heaters have been widely used in aerospace, arms industry, chemical industry, and scientific research and production laboratories in colleges and universities. They are particularly suitable for automatic temperature control and high-flow high-temperature combined systems and accessory testing.


In addition, due to its ability to heat any gas, the resulting hot air boasts various excellent properties, making it suitable for applications such as drying, sulfuring, heat treatment, reheating, and dehumidification of various materials.