Water heater

摘要

A fan serves to suction combustion gas which has passed through a secondary heat exchanger and emitting combustion gas to the outside of a water heater. A drainage water discharge pipe is connected to the secondary heat exchanger in order to discharge the drainage water produced as a result of recovery of latent heat in the secondary heat exchanger to the outside of the secondary heat exchanger. An air passage pipe is connected to an exhaust box. A Y-shaped pipe joint has a flow path allowing merging of the drainage water discharge pipe and the air passage pipe, and the flow path after merging leads to the outside of the water heater.

主权项

1. A water heater of a latent heat recovery type, capable of heating water by recovering latent heat of combustion gas, comprising:
a burner which generates combustion gas; a heat exchanger which heats water which flows through inside, through heat exchange with combustion gas produced in said burner; a fan which suctions combustion gas which has passed through said heat exchanger and emits combustion gas to outside of said water heater; a drainage water discharge pipe which is connected to said heat exchanger and discharges drainage water produced as a result of recovery of latent heat by said heat exchanger to the outside of said heat exchanger; an air passage pipe connected to a path for flow of combustion gas from said heat exchanger to said fan; and a pipe connection portion which has a flow path allowing merging of said drainage water discharge pipe and said air passage pipe, said flow path after merging leading to the outside of said water heater.