HOT WATER SUPPLY TYPE BOILER INCLUDING WASTE HEAT RECOVERY UNIT AND HOT WATER SUPPLY HEAT EXCHANGER

摘要

A hot water supply type boiler is disclosed, in which cold water is heated by a waste heat recovery unit and a hot water supply heat exchanger, and then is again heated in a boiler container, thereby remarkably improving a fuel saving efficiency and heat exchanging efficiency. The boiler includes a waste heat exchanging means for primarily heating the water supplied from an exterior using waste heat of an exhaust gas, a hot water supply heat exchanging means for secondarily and thirdly heating mixed water of the primarily heated water and the water supplied from the exterior, and a boiler heat exchanging means for heating the water through the hot water heat exchanging means using the heat generated by a burner or heater and fourthly heating the thirdly heated water.