The Role of NTC Thermistors in Electric Warming Hand Treasures.metal cap Photoresistor

　　The weather is getting colder, and the demand for electric hand warmers is also gradually increasing. At present, the electric heating products on the market convert electrical energy into thermal energy through electrodes, indirectly or directly heating the liquid inside the electric heating products. When the power is turned on, the indicator light is on, indicating that the power is turned on and heating is in progress; When the indicator light is off, it indicates that the heating is completed or the power is not connected. In order to avoid accidents such as explosions or combustion caused by overcharging the internal liquid temperature of the electric hand warmer, manufacturers will choose to install NTC thermistors for temperature monitoring and protection to ensure the safety of users.

　　Today, will introduce an electric hand warmer. It not only installs an NTC thermistor as a temperature protection component, but also has an audible alarm that can remind users to power off the electric hand warmer in a timely manner after charging. This electric heating device includes a light-emitting diode, knob, housing, battery, alarm, fixed buckle, NTC thermistor, aluminum plate, and PCB board. The lower bottom plate of the electric heating treasure shell is an aluminum plate with good thermal conductivity. NTC thermistors are installed on the upper part of the aluminum plate, and NTC thermistors are also connected in series in the circuit of the PCB circuit board; The side of the shell is equipped with a light-emitting diode and a knob, and a battery is embedded in the groove on the upper part of the shell. The battery is composed of two+1.5V batteries connected in series, providing+3V DC power supply; The shell of the alarm is fixed to the surface of the electric heating device through a fixing buckle.

　　The electric heating treasure with an alarm not only sends effective warning messages to users when the temperature exceeds the preset value, reminding them to cut off the power supply in a timely manner after heating is completed, but also installs NTC thermistors, which can effectively prevent explosions and combustion accidents caused by excessive heating of the electric heating treasure due to various reasons, increase the safety of use, and bring great convenience to people's lives.

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