Water Heater

摘要

A water heater is provided that can suppress backflow (entry) of drainage water into a fan from downstream of the fan in a path of a flow of combustion gas. The fan includes a fan case, an impeller housed within the fan case, a drive source attached to the fan case so as to drive the impeller, and a rotation shaft connecting the impeller and the drive source. An exhaust connection portion has a connection portion case and is provided with an exhaust port for emitting combustion gas delivered from the fan to outside of the water heater. The exhaust connection portion also has a drainage water discharge portion for discharging drainage water accumulated downstream of the fan in the path of the flow of combustion gas.

主权项

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.