Duct heaters, also known as duct heaters or duct electric heaters, are specialized equipment designed for air heating within ducts. Below is a detailed explanation:
I. Structure and Composition
Air Duct Heaters are mainly composed of the inner tube, multi-blade tubular electric heating elements, insulating layer, junction box, fan (optional), and control system, etc. Among them, the electric heating elements are the core components of the heater, which heat up through the flow of electricity.
The function generates heat, heating the air to the desired temperature. The insulation layer is used to reduce heat loss, enhancing the heating efficiency.
II. Working Principle
The working 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, achieving the purpose of constant temperature control.
III. Technical Features
High heating temperature: The ducted heater can heat air to very high temperatures, usually up to 450°C, and even as high as 850°C. At the same time, the housing temperature remains relatively low, typically around 50°C.
High heating efficiency: Due to the use of advanced electric heating elements and optimized heat exchange design, the duct-type heater boasts an exceptionally high heating efficiency, exceeding 0.9.
Rapid heating and cooling rates: The duct-type 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 duct-type heater demonstrates good mechanical properties and strength due to the use of specialized alloy materials as the heating element, standing up well under the impact of high-pressure air flow.
Long service life: The duct heater can last for decades without violating the operating procedures.
Air Purification: The heated air produced during the process is dry, free of moisture, non-conductive, non-flammable, non-explosive, non-corrosive, and free of pollution, ensuring safety and reliability.
Section 4: Application Fields
Duct heaters have been widely used in aerospace, armaments 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. This
In addition, due to its ability to heat any gas, the resultant hot air boasts various excellent properties, making it suitable for applications such as drying, sulfuring, heat treatment, reheating, and dehumidification of various substances.
