Heat energy recovery device for wall-mounted water heater

The heat energy recovery device for the wall-mounted water heater comprises a shell, the interior of the shell is divided into a heating area and a heat dissipation area, a heating pipe is arranged in the heating area, a water inlet pipe and a water outlet pipe are arranged in the heat dissipation area in a penetrating and interference fit mode, and circulating hoses are arranged at the two ends of the heating pipe. Wherein the other end of one circulating hose is connected with one end of the water inlet pipe, the other end of the other circulating hose is connected with one end of the water outlet pipe, and the ends, not connected with the circulating hoses, of the water inlet pipe and the water outlet pipe are respectively a water inlet and a water outlet. Heat generated outside the heating pipe in the heating process is transferred to cold water in the water inlet pipe in a heat conduction mode so as to preheat the cold water, the utilization rate of heat energy outside the heating pipe is increased, and