How many times the allowable surface power load of electric heating tubes is that of ordinary components?

How many times the allowable surface power load of electric heating tubes is that of ordinary components?
The heat sink electric heating tube is wound with a metal radiator on the surface of the ordinary component, and the heat dissipation area is enlarged by 2 to 3 times than that of the ordinary component, that is, the allowable surface power load of the fin is 3 to 4 times that of the ordinary component. Due to the shortening of the length of the component, the heat loss of the component is reduced. Under the same power condition, the utility model has the advantages of fast heating, uniform heating, good heat dissipation performance, high thermal efficiency, long service life, small heating device, low cost, etc. .

Filling material with high thermal conductivity

It can not only increase the thermal conductivity and reduce the thermal inertia, but also has more practical significance. For example, the smaller the inertia, the smaller the heat accumulation phenomenon in the tube, and the higher the electric heating efficiency of the heating element; and the lower the heat in the tube, the insulation will fail The smaller the possibility of, or the smaller the leakage current, the safer the whole machine will work and so on.

What are the measures to prevent pitting corrosion of stainless steel electric heating tubes?

1. When the water tank is in use, add a small amount of corrosion inhibitor, such as some oxygen-containing anions (such as hydroxide, nitrate, etc.), to prevent pitting corrosion.

2. Strictly control the scratches or scratches inside the inner tank during the production process. The comparison of the effects of different depths of surface scratches on the anticorrosive performance of the inner tank shows that the corrosion rate increases significantly when the scratch depth is 0.05mm. Therefore, the surface of the steel plate is strictly protected during stainless steel processing, and scratches that can be touched by hands are not allowed. mark.

3. In the early stage, stainless steel pickling passivation paste was used to treat a batch of normally welded stainless steel samples. Compared with the untreated samples for pitting corrosion resistance, it was found that the pitting corrosion resistance was greatly improved, and the weight loss rate dropped from 2.91% to 1.04% .

4. In electric water heaters, using traditional magnesium rods or resistance magnesium rods as one pole (anode) of the electrochemical reaction chain can be corroded by corrosion ions in water before stainless steel, thereby reducing the damage of corrosion ions to the metal in the tank. Delayed the corrosion speed and strength of the inner metal. Power-on anti-corrosion, using cathodic anti-corrosion method to maintain a potential lower than pitting corrosion potential.

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