Doesn't mean. According to relevant public information, liquid heater includes electric kettle, cordless electric kettle, coffee pot, egg cooker, rice cooker, steamer, clean boiler and other electrical appliances, so liquid heater is not equal to kettle. Generally speaking, a liquid heater is a heater that uses benzoic acid as a heating reagent and uses the eddy current generated by metal in an alternating magnetic field to heat itself, which is usually used for metal heat treatment.