Electromagnetic air heater

Abstract

The invention relates to the technical field of electromagnetic induction heating equipment, and particularly discloses an electromagnetic air heater which comprises a rack and an electromagnetic heating air duct, and the electromagnetic heating air duct comprises an air inlet and outlet assembly; the fan is used for inputting cold air and outputting hot air; an electromagnetic coil is wound on the outer side of the heating barrel, the heating barrel is used for preheating cold air and heating the preheated cold air into hot air, the heating barrel comprises a first heating gun barrel and a second heating gun barrel, an inner barrel and an outer barrel which are communicated with each other are arranged in the first heating gun barrel and the second heating gun barrel respectively, a preheating cavity is formed in the inner barrel, and a heating cavity is formed in the outer barrel. The outer wall of the inner barrel is connected with the inner wall of the outer barrel through a plurality of partition plates, an independent heat exchange cavity is formed between every two adjacent partition plates, and a flow guide assembly used for prolonging the hot air flowing distance is arranged in each heat exchange cavity; the electromagnetic air heater increases the heating area, can greatly improve the heat exchange efficiency by being matched with the preheating cavity, effectively utilizes the heat of the inner cylinder, and reduces the waste of energy.

Description

technical field [0001] The invention relates to the technical field of electromagnetic induction heating equipment, specifically, an electromagnetic heating fan. Background technique [0002] At present, known electromagnetic heaters or electromagnetic heaters use electromagnetic coils to wind metal air cylinders, and the metal air cylinders are heated by high-frequency currents. And then generate hot air, so that the hot air is used for drying products. [0003] In order to increase the heat exchange area, some metal air ducts are equipped with fins in the radial direction to improve heat exchange efficiency, but adding radial fins cannot effectively increase the air temperature in the area near the axis of the air duct; After the fins are installed in the direction, a spoiler is installed at the air inlet of the metal air duct to make the air flow turbulent, but the air will become laminar flow instead of turbulent flow after a certain distance, and the turbulence effect ...

AI Technical Summary

Problems solved by technology

[0003] In order to increase the heat exchange area, some metal air ducts are equipped with fins in the radial direction to improve heat exchange efficiency, but adding radial fins cannot effectively increase the air temperature in the area near the axis of the air duct; After the fins are installed in the direction, a spoiler is installed at the air inlet of the metal air duct to make the air flow turbulent, but the air will become laminar flow instead of turbulent flow after a certain distance, and the turbulence effect is not great. It is not ideal and increases the kinetic energy loss of the air, which increases the operating cost

[0004] The high-frequency current of the induction coil heats the metal air cylinder, but the temperature distribution of the metal air cylinder is the highest outside temperature, and the temperature decreases near the center. The known air cylinder structure makes air flow in the part of the air cylinder near the outside, and the metal air cylinder Although the temperature of the axis area is lower than that of the outer side, it is much higher than the room temperature. This part of the heat is not effectively used, resulting in energy waste

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