Open type instant electric water heater device

The invention discloses an open type instant electric water heater which comprises a box cover 1, a bottom box 10, an intelligent electronic integration system 13 and a water channel circulation heating integration system 37. The intelligent electronic integration system 13 is composed of an intelligent electronic integration system body 13, a cable 9, a current sensor 54, a negative ion generator 17 and a digital displayer 55. The water channel circulation heating integrated system 37 is composed of a cold water inlet pipe 31 with an electricity insulation wall, a hot water outlet pipe 35 with an electricity insulation wall, an overtemperature protection device a41 and an overtemperature protection device b42. The box cover 1 is used for installing a digital display 55 to obtain data signals during use, the bottom box 10 is used for installing an intelligent electronic integrated system 13 and a water channel circulation heating integrated system 37, and the water channel circulation heating integrated syste