Jun 01, 2021
Common faults of the hair dryer resistance wire
Hair dryers are commonly used electric appliances in our homes. They can allow us to change our style beautifully, and let us experience the smell of wind, etc...
But do you know the principle of a hair dryer?
General household hair dryers are mainly provided by a high-speed electric fan to provide the air source, and an "electric heating wire" for heating to provide the heat source. The heating wire is installed in the fan inside the blower outlet.
As long as the hot air of the fan of the hair dryer is turned on, the heating wire in the hair dryer will start to heat, and then it will become hot air when the high-temperature air is blown out. As long as the heating is turned off, the air without the high-temperature heating wire will be normal air..
The heating wire materials in the current hair dryers are generally iron-chromium-aluminum alloy and nickel-chromium alloy. The iron-chromium-aluminum alloy and nickel-chromium alloy heating wire transfer heat very fast, and it does not produce harmful substances, so everyone You can also use the hair dryer with confidence.
But the heating wire of the hair dryer is afraid of the following situations:
1. The heating resistance wire is red
When the normal hair dryer of the plastic shell is working, the surface of the heating wire should not be red or slightly red, but if used for a long time or incorrectly used, the plastic shell will be overheated and deformed or even burned. This requires attention. Yes, once you hear the fan rotating sound incorrectly, you should immediately observe whether the heating wire is red. If it is red, it needs to be repaired in time to avoid accidents.
2. The heating resisitance wire is broken
Improper use of the heating wire will cause desoldering or breakage, and the screws fixing the heating wire will also be loose or excessively oxidized, which will lead to poor contact. In this case, the heating wire will not heat up, and there will be no hot air blowing.
3. The heating resistance wire touches the shell
If the heating wire touches the shell due to breakage or other reasons, there will be a risk of electric shock, and it may cause the aging of the hair dryer or motor failure.
Of course, if the hair dryer is slightly loose, you can also solve it by yourself: find a medical stainless steel injection needle above No. 10, cut a small section of 5-10mm long, and put it in the original brass rivet hole as a fulcrum. Because the coefficient of thermal expansion of red copper is larger than that of stainless steel, when the temperature rises, it will not loosen, but will make the contact tighter. This method can also be applied to other electric heating appliances.
