O princípio do chip de controlo da temperatura do cigarro eletrónico

The principle of the temperature control chip for electronic cigarettes is mainly based on the characteristic that the resistance of the heating wire changes with temperature. The temperature control chip of an electronic cigarette calculates the temperature information by detecting the resistance change of the heating wire, rather than directly detecting the temperature through a temperature sensor.

Heating wire, also known as resistance wire, is usually made of metal wire or alloy wire. The resistance of metals changes as the temperature rises. The chip takes advantage of this property to control the temperature of the heating wire through a preset temperature coefficient (TCR). For instance, the resistance value of the heating wire at room temperature is a certain value. After being powered on, as the temperature rises, its resistance value will change. The chip estimates the current temperature by monitoring these resistance changes in real time and adjusts the current passing through the heating wire to maintain the temperature set by the user.

Specifically, when the user sets a target temperature, the chip will continuously monitor the resistance value of the heating wire. As the temperature of the heating wire rises, its resistance value will also increase accordingly. When the resistance value increases to the preset value corresponding to the target temperature, the chip will reduce the output power to prevent the temperature of the heating wire from rising further. Conversely, if the temperature of the heating wire drops and the resistance value decreases, the chip will increase its output power to maintain the set temperature.

In addition, the temperature control chip also has some safety protection functions, such as overheat protection and short-circuit protection. When an abnormal situation is detected, the chip will immediately cut off the power supply to protect the safety of users and equipment.