Working principle and operation method of electrothermal foot warming scheme development
Working principle and operation method of electrothermal foot warming scheme development
This paper introduces the working principle of the scheme development of electrothermal foot warming treasure; As winter comes, the temperature continues to drop. In order to resist the severe cold, people have moved out thermal bags, such as warm water bags, electric heaters, baby heaters, heating fans, etc. the original is warm water bags, and the common is electric foot warmers, which can maintain heat for a period of time and bring warmth to people through electric heating.
Principle
It is equipped with automatic overheating protection device and automatic insulation indication device, and the heater is controlled by PTC thermistor switch. PTC is a thermistor with positive temperature coefficient. When the current passes through, it will heat itself. When the temperature reaches a certain value, its resistance will increase sharply, which can be regarded as disconnection. Therefore, the electric heater stops consuming electric energy at this time, and then slowly releases heat by using insulating cotton to keep feet warm.
Electric foot warming treasure
Operation method
1. Use a small funnel to add water. A small funnel needs to be inserted into the water bag. When the tap receives water, it must be dripping, and then slowly pour it into the water bag through a small funnel. If the indoor temperature is relatively low, it is recommended to use warm boiled water, so it is easy to enter the bag;
2. 90% of the water in the water bag is enough, do not fill it; Be careful not to let water drop on the power socket, otherwise the indicator light will not light up;
3. Exhaust is very important. After adding water, hold the water inlet tightly, squeeze the bag slowly with the other hand until you see the water overflow, and then close the black plug immediately. This step is very important to prevent hidden dangers;
Electric foot warming treasure
4. Dry the surface of the electric heating foot heater and ensure that there is no water in the power socket;
5. Gently shake the water injection bag to ensure that the liquid in the injection bag is shaken evenly;
6. After you plug in the power supply and charge it, you need to observe it carefully. If the water filling bag is bulging, pull off the power switch immediately and then exhaust. If it is normal after charging, please wait until it is heated and exhaust again;
7. After charging and confirming that the air has been exhausted, remember to insert the plug tightly and deeply to prevent water leakage and scalding.