During the use of electric heating tubes for civil and industrial use, people often have questions about the longer heating time of the heating tube. Why does the electric heating tube have the problem of slow heating? Most people think that the heating tube is damaged or the quality of the heating tube is defective. In fact, there are many reasons for the slow heating of electric heating tubes, and they are introduced one by one below:
1. In the case of heating water, due to the problem of water quality, the surface of the heating tube is prone to scale. The large amount of scale will cause the thermal efficiency of the heating tube to decrease. Therefore, in the case of heating water, it is found that the electric heating tube is heated after a period of time. The problem of scale should be considered first.
2. Generally, the length of heating time is proportional to the power of the electric heating tube. The greater the power, the shorter the heating time, so it is necessary to select the appropriate power before using the electric heating tube.
3. The heating environment changes, whether it is heating liquid or dry burning, the starting temperature of heating must be considered when designing the electric heating tube. Since the heating environment is impossible to maintain the same, the heating time will vary with the starting temperature. Change and become longer or shorter. Therefore, considering the heating time, the power should be increased appropriately to ensure the heating efficiency when designing the electric heating tube.
4. The external power supply environment will also affect the heating efficiency, and the corresponding electric heating tubes are also different under the voltage environment of 220V and 380V. Insufficient power supply voltage caused by peak electricity consumption or other reasons will cause the heating tube to work at low power, and the heating efficiency will also decrease.
5. In addition, long-term uninterrupted use will also cause the heating of the electric heating tube to slow down, because the heating principle of most heating tubes is that the internal resistance wire generates heat and then heat transfers. The resistance value of the resistance wire will change under the condition of high temperature for a long time. Large causes slower heating. Therefore, under long-term high temperature conditions, slowing down is a normal phenomenon. Regular rest and maintenance methods can be adopted to not only ensure the heating efficiency but also extend the service life.
