Patent ID: 9746204
Date: 2017-08-29
CPC Classifications: F23D,F23J,F23L,F24H,Y02B,Y02E

Claim:
1. A water heater of a latent heat recovery type capable of heating water by recovering latent heat of combustion gas, said water heater comprising: a burner including a plurality of burner port portions and generating combustion gas from an opening at an end of each of said plurality of burner port portions; a heat exchanger heating water flowing through inside by heat exchange with combustion gas generated in said burner; a fan including a fan case, an impeller housed within said fan case, a drive source attached to said fan case so as to drive said impeller, and a rotation shaft connecting said impeller and said drive source, and suctioning combustion gas having passed through said heat exchanger and emitting combustion gas to outside of said water heater; and an exhaust connection portion having a connection portion case and provided with an exhaust port for emitting combustion gas delivered from said fan to outside of said water heater, said exhaust connection portion having a drainage water discharge portion for discharging drainage water accumulated downstream of said fan in a path of a flow of combustion gas, wherein in plan view as seen from a shaft direction of said rotation shaft, a tongue portion extending between an internal space of said fan and an internal space of said exhaust connection portion is located at one end of a boundary between the internal space of said fan and the internal space of said exhaust connection portion, a circumferential wall of said fan case and a circumferential wall of said connection portion case are linearly connected to each other at the other end of said boundary, and said drainage water discharge portion is provided in a region surrounded by said boundary, said circumferential wall of said connection portion case and a tangent line of said exhaust port, and located along said circumferential wall of said connection portion case.