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
Air duct heaters are mainly composed of the inner tube, multiple finned tubular electrical heating elements, insulation layer, junction box, fan (optional), and control system, etc. Among them, the electrical heating elements are the core components of the heater, powered by electrical current.
The function generates heat, raising the air to the desired temperature. The insulation layer is used to minimize heat loss and enhance heating efficiency.
Section II: Working Principle
The operation principle of the duct heater is relatively simple. When cold air blows over, it passes through an electric heating element to be heated. The heated air, after collecting temperature signals through the exhaust outlet, feeds these signals 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, thereby achieving the purpose of constant temperature control.
Section 3: Technical Features
High heating temperature: The duct-type heater can heat air to very high temperatures, typically up to 450°C, even as high as 850°C. At the same time, the housing temperature remains relatively low, usually around 50°C.
High heating efficiency: With advanced electric heating elements and optimized heat exchange design, the ducted 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: Due to the use of specialized alloy materials as the heating element, the duct-type heater demonstrates good mechanical properties and strength under the impact of high-pressure air flow.
Long lifespan: The lifespan of the duct heater can last for decades, provided it is used in accordance with 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 contamination, ensuring safety and reliability.
Four, Application Fields
Air duct heaters have been widely used in aerospace, arms industry, chemical industry, and 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
Additionally, due to its ability to heat any gas, the resulting hot air possesses numerous excellent properties, making it also suitable for various applications such as drying, sulfuring, heat treatment, reheating, and dehumidification of different materials.
