Midea electric kettle can be heated regularly when plugged in. According to the description of electric hot water, heat preservation means that the program starts (heats) when its temperature sensitivity is set within a certain range (such as 80- 100 degrees) and stops when the water boils (100 degrees). Repeat the above actions in turn to achieve heat preservation effect. Heat preservation means burning all the time, and the nitrite value will continue to rise.