Its working principle: cold water fills the hot tank, and the heating pipe is powered on for heating after startup. When the temperature reaches a certain temperature (generally 92 ℃), the sudden jump thermostat jumps off, and the heating stops, and the hot water is kept warm and gradually cooled. When it is cooled to a certain temperature (generally 86 ℃), the sudden jump thermostat is closed and heated again, which is repeated. The instant heating type is without heat bladder. It is instant heating without waiting, and nutrition is not lost; Safety, environmental protection and quickness are the biggest characteristics of the instant drinking water dispenser. The water temperature is constant, easy to use, fast, and in line with the fast-paced living standard of modern people