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Question:

What is the temperature control principle of electric kettle?

What is the temperature control principle of electric kettle?

Answer:

The PTC heating element has great advantages for the thermal insulation of the electric kettle. Electric kettle heating insulation power is relatively small, the use of PTC heating element will not increase the cost. The PTC heating element has the function of preventing dry burning, and the dry burning power is about 1/10 of the boiling water power. Under the condition that the temperature control element fails, the temperature of the PTC itself is kept at a lower temperature, and no danger occurs.
However, as many electric kettle designers are not accustomed to using PTC heating elements, coupled with the relatively high price of PTC, the volume is relatively large, so that its application is limited.
Using the PTC heating element instead of the heating tube can effectively prevent fire hazard due to dry burning. PTC heating element dry burning temperature can be set at any temperature between 150 DEG ~250 DEG, when the temperature reaches the set temperature, the resistance of the PTC element increases rapidly, the heating power decreases sharply, the temperature is maintained and will not continue to rise at the set temperature. The automatic control of the temperature of the PTC heating element is absolutely reliable. It relies on the resistance changes in the PTC body to control the temperature, rather than relying on any contact control. So now many high-end electric kettle adopts PTC antipyretic components.
The working principle of the electric kettle is: double metal sheet using water vapor from the boiling water to steam temperature components of the deformation, using deformation based on the principle of lever push the power switch, so that the electric kettle is automatically turned off after the water boil. The power failure is not self reset, so the kettle will not automatically reheat after power failure.

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