| 摘要 |
The present invention aims to provide a latent heat exchanger having a pre-heating device for supplied air, for pre-heating air flowing in from the outside of a boiler as the air passes through the latent heat exchanger, and for supplying the air through an air blower so as to reduce combustion load. To this end, the boiler of the present invention comprises: a burner for combusting fuel and air supplied through the air blower; a sensible heat exchanger for absorbing sensible heat generated from combustion by the burner; a latent heat exchanger for absorbing the latent heat of water vapors, which are included in a combustion product that has been heat-exchanged in the sensible heat exchanger; and an exhaust hood for discharging the combustion product, which is passed through the latent heat exchanger, wherein the latent heat exchanger is provided with a pre-heating port for forming an air passage so that the air supplied from the outside of the boiler is supplied to the air blower after being pre-heated by heat-exchanging with the combustion product. |
