Water heating device

A water heating device, comprising:

• a heat exchanger having a case to which heating air is supplied, and at least one heat transfer pipe accommodated inside the case;
• and
• a straightening vane arranged on a downstream side of the heat transfer pipe in a heating air flow direction, and having a plurality of vent holes which allow the heating air that has passed through an arrangement region of the heat transfer pipe to advance toward an equipment or a member at a rear stage of the heat exchanger, wherein
• the heat transfer pipe comprises a plurality of pipe body portions that extend along a direction intersecting the heating air flow direction and approach the straightening vane, and
• the plurality of vent holes are disposed so as to overlap the plurality of pipe body portions in the heating air flow direction,
• wherein the heat transfer pipe comprises a plurality of meandering heat transfer pipes obtained in a way that a plurality of straight pipe body portions are continuously joined via a plurality of connection pipe body portions, wherein the plurality of straight pipe body portions are lined up in an up-down height direction and extend in a horizontal direction, and the plurality of meandering heat transfer pipes are lined up in a horizontal direction;
• the straightening vane approaches the plurality of meandering heat transfer pipes and is arranged in a horizontal posture below the plurality of meandering heat transfer pipes;
• and
• the plurality of straight pipe body portions which are positioned on a lowest end of each of the plurality of meandering heat transfer pipes correspond to the plurality of pipe body portions that extend along the direction intersecting the heating air flow direction and approach the straightening vane,
• unheated water supplied to the water heating device is supplied to the plurality of straight pipe body portions which are positioned on the lowest end of each of the plurality of meandering heat transfer pipes in the heat exchanger.