Electric heater for high temperature air

Abstract

The invention discloses an electric heater for high temperature air, and the electric heater is composed of hollow electric heating pipes, a sealed pressure container provided with a cold air inlet and a hot air outlet, a front end insulated fixing element and a tail end insulated sealing fixing element, wherein the tail end of the sealed pressure container is sealed, the hot air outlet is arranged on the front end of the sealed pressure container, the cold air inlet is arranged on the wall (close to the front end) of the pressure container, in the sealed pressure container, the front end insulated fixing element is arranged between the cold air inlet and the hot air outlet, the tail end insulated sealing fixing element is arranged at a position (close to the tail end) in the sealed pressure container, the plurality of hollow electric heating pipes are fixed in the sealed pressure container through the front end insulated fixing element and the tail end insulated sealing fixing element, gaps are reserved among the electric heating pipes and among the electric heating pipes and the inner wall of the sealed pressure container, and the electric heater for the high temperature air utilizing the structure provided by the invention has the advantages of small volume, high power, high efficiency, energy saving, material saving, large gas flow rate, small flow resistance, high heating and cooling speed, good safety and anti-explosion property, etc.

Description

technical field [0001] The invention relates to an air electric heater, in particular to the field of a high-temperature air electric heater. Background technique [0002] At present, the electric heating element of the commonly used tubular heat exchanger must pass the filler, which is usually magnesium powder, to transfer heat to the wall of the electric heating element tube, and then exchange heat with the air. This method has the following disadvantages: 1. The heating efficiency is not good. High, 2, large heat loss, wasting a lot of energy, 3, slow heating rate, 4, low maximum temperature, 5, unsafe, 6, short life, 7, large space occupation and other shortcomings. [0003] The invention overcomes the above disadvantages, and is widely used in many places requiring high-temperature air, such as chemical industry, electric power, aviation manufacturing fields and weapon industry. Contents of the invention [0004] The purpose of the present invention is to provide a h...

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Problems solved by technology

[0002] At present, the electric heating element of the commonly used tubular heat exchanger must pass the filler, which is usually magnesium powder, to transfer the heat to the tube wall of the electric heating element, and then exchange heat with the air. This method has the following disadvantages: 1. The heating efficiency is not good. High, 2. Large heat loss, wasting a lot of energy, 3. Slow heating rate, 4. Low maximum temperature, 5. Unsafe, 6. Short life, 7. Large space occupation, etc.

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