An air electric heater with percolation holes on the heating tube

Abstract

The invention relates to air electric heater equipment, in particular to an electric heater with heating pipes provided with seepage holes. The electric heater comprises a shell. A heater air inlet isarranged on the upper portion of one end of the shell, and meanwhile, a heater air outlet is correspondingly arranged on the side face of the end, with the heater air inlet, of the shell. A heating core barrel is arranged in the shell, barrel covers are arranged on the left side and the right side of the barrel, the right end of the barrel is fixed to the side face of the shell, and a cavity is formed between the side face of the right end of the shell and the barrel covers. The multiple heating pipes are arranged on the barrel, and the two ends of each heating pipe are fixed to the two barrel covers of the barrel correspondingly and penetrate the barrel covers by a certain distance. A heating pipe air inlet and a heating pipe air outlet are arranged at the left end and the right end of each heating pipe, and the corresponding seepage holes are formed in each heating pipe body. The electric heater has the advantages that due to the fact that air gradually flows out from the seepage holes in the heating pipes, it is guaranteed that always a layer of low-temperature air inside and outside each heating pipe is heated, and the effective temperature difference is increased. By means ofthe seepage holes, the convective heat transfer coefficient inside and outside each heating pipe is increased.

Description

technical field [0001] The invention relates to an air electric heater device, in particular to an electric heater with a seepage hole on a heating tube. Background technique [0002] Electric air heaters play an important role in industry. Use the energized element to generate heat, and conduct convective heat transfer between the surface of the energized element and the air to transfer heat to the air. The efficiency of heat transfer is determined by the convective heat transfer area, heat transfer coefficient and convective heat transfer temperature difference. The larger these three parameters, The higher the heating efficiency. The heating tube is a commonly used heating element. The air flows inside and outside the heating tube to absorb the heat generated by the heating tube to reach the temperature required by the air at the outlet of the heater. Since the heating tube wants to transfer heat to the air, its own temperature must be higher than that of the air, and i...

AI Technical Summary

Problems solved by technology

The disadvantage of the current heating method is that the heated air is always near the wall of the heating tube, and the effective temperature difference becomes smaller and smaller as the heat transfers.

However, the low-temperature air far from the wall of the heating tube cannot effectively absorb the heat generated by the heating tube.

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