Internal circulating type high efficiency energy-saving stove

The utility model relates to an internal circulation type efficient energy-saving furnace which is the combination body of a household coal furnace and a water heater. The utility model is characterized in that an internal circulation type heater is sheathed horizontally on the upper part of the furnace core of a coal furnace, and the internal circulation type heater is composed of an annular hollow metal pipe whose cross section is rectangular and a water inlet pipe and a water outlet pipe arranged on the two ends of the annular hollow metal pipe. The water inlet pipe and the water outlet pipe are totally extended into the same water tank, and the position of a water inlet in the water tank is lower than a water outlet. When the internal circulation type heater is heated by the furnace core, hot water in the internal circulation type heater is flown into the upper part of the water tank from the water outlet. Cooler water of the lower part of the water tank is sucked by the water inlet pipe into the internal circulation type heater to be heated. The process is repeated again and again in such a manner, internal circulation is never stopped, and the water temperature of the water in the integral water tank is gradually risen for people' s living requirements.