▎ 摘　　要

NOVELTY - The utility model claims a heating and heat storage water tank with multi-cavity structure, comprising: a box body base frame, a box body plate and a cavity separating plate, the box body plate is a ladder-shaped structure integrally formed, the step-shaped boundary of the ladder-shaped structure is provided with a cavity separating plate vertical to the box body base frame, the cavity separating plate divides the box body plate into a water inlet cavity and a water outlet cavity; the door plate connected with multiple sequentially is connected with the connecting door plate, the water inlet cavity is divided into a water return cavity and a heat storage cavity; the heat storage cavity is provided with graphene heat storage body, graphene heat storage body and the water flow for heat exchange; the heat storage cavity is provided with multiple baffle plates, the heat storage cavity is divided into a plurality of heat storage sub cavities, each baffle plate is alternately arranged, the water flow enters the heat storage cavity for multiple times of deflection. The utility model is provided with multiple cavities, realizing fully phase change heat release and heat graphene of the heat storage material, fully using heat exchange, realizing efficient water heat storage and heat release, avoiding heat loss, the manufacturing technique is simple and the cost is low.