Direct-heating type electric water heater

The utility model relates to a direct-heating type electric water heater. A heat cavity is provided with odd blocks of electrode plates which are provided with water filleting holes and lugs and form an electric field with parallel polar plates, and the heat cavity is also provided with a power supply circuit which has a power-off protection function. Water is used as a conducting medium, so that electric energy can be directly converted into heat energy. When no water exists, the electrodes are naturally in an off state without energy consumption, and the problems of dry combustion and the damage to the water heater do not exist. Especially, no matter where live lines, zero lines and earth lines are cut off or are in the state of poor contact or short circuit, the whole power supply circuit has no voltage for output, so that the electric water heater is in the state of absolute safety, and the phenomena of the hanging of electrodes and electric shock can not occur.