The invention discloses a heating unit for an
electromagnetic heating type instant
water heater. A heating portion is connected with a cooling portion through a joint pipeline. The heating portion comprises
water flow passages, an integral aluminum
casting layer and inductive heating tubes, the
water flow passages and the inductive heating tubes are combined through the integral aluminum
casting layer by means of aluminum
casting, the integral aluminum casting layer is in an integrally hollow cylindrical structure, and the
water flow passages surround the inductive heating tubes. The cooling portion comprises a
magnetic tube supporting column, a coil support tube, outer end covers, a cooling water inlet
nozzle and a cooling water outlet
nozzle, the outer end covers are provided with through holes and mounted at two ends of the integral aluminum casting layer, the coil support tube is arranged on the outer end covers through the through holes and connected with the integral aluminum casting layer, the
magnetic tube supporting column is mounted in the coil support tube, and two ends of the coil support tube are provided with the cooling water inlet
nozzle and the cooling water outlet nozzle.