NTC热敏电阻在电热暖手宝中的作用

The role of NTC thermistor in electric hand warmers

Number of Views:33212021-12-09 16:53:21

As the weather gets colder, the demand for electric hand warmers is gradually increasing. At present, electric heaters on the market convert electrical energy into heat energy through electrodes, and indirectly or directly heat the liquid inside the electric heaters. When the power is turned on, the indicator light is on, indicating that the power is on and heating is in progress; the indicator light is off, that the heating is completed or the power is not turned on. In order to prevent the temperature of the internal liquid from rising due to overcharging of the electric hand warmer, causing explosion or burning accidents, manufacturers will choose to insert NTC thermistors for temperature monitoring and temperature protection to ensure the safety of users.
Today, Dongguan Jingpin Electronics introduces an electric hand warmer. It not only installs an NTC thermistor as a temperature protection element, but also has an audible alarm to remind users to cut off the power in time after the electric hand warmer is fully charged. This electric heater includes light-emitting diodes, knobs, housing, batteries, alarms, fixing buckles, NTC thermistors, aluminum plates and PCB boards. The lower bottom plate of the electric heater shell is an aluminum plate with good thermal conductivity. The NTC thermistor is installed on the upper part of the aluminum plate, and the NTC thermistor is connected in series in the circuit of the PCB circuit board at the same time; the side of the shell is equipped with light-emitting diodes and knobs, the shell A storage battery is embedded in the upper groove. The storage battery is composed of two +1.5V batteries connected in series to provide +3V DC power; the shell of the alarm is fixed on the surface of the electric heater through a fixing buckle.
The electric heater with alarm can not only send an effective warning message to the user when the temperature exceeds the preset value, prompting the user to cut off the power supply in time after the heating is completed, but also install an NTC thermistor, which can effectively prevent the electric heater from being caused by Explosion and combustion accidents caused by overheating caused by various reasons have increased the safety of use and brought great convenience to people's lives.

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