Patent ID: 8306407

Claim:
A high-efficiency water boiler comprising: a shell; a heating unit located in the shell, wherein the heating unit includes a first heating tank filled with fuel and a heater located in the first heating tank for heating the fuel; a containing unit including a first container provided around the first heating tank, wherein the first container includes a leading section and a tailing section; a heat conduction unit including a plurality of radial heat conduction pipes leading to the first container from the first heating tank to transfer heat to the first container from the first heating tank; a cooling unit including a first exchanger for cooling the fuel going therein from the first heating tank; an inlet pipe extending through the first heat exchanger and including an end connected to the leading section of the first container so that the water can go into the first container through the inlet pipe; and an outlet pipe connected to the tailing section of the first container so that the water can leave the first container through the outlet pipe.