Noritz Corporation

Naoya Shiotsu

Norihide Wada

Masaki Kondo

Takeshi Ohigashi

A heat exchanger includes: a case which has a first side wall that stands upright in a vertical height direction and to which a heating medium is supplied inside; and heat transfer tubes for heating hot water housed in the case. Two end portions of the heat transfer tubes in a longitudinal direction are joined to the first side wall via brazing portions, and the heat transfer tubes are supported by the first side wall. The heat exchanger further includes heat transfer tube support portions provided on the first side wall for supporting portions of the heat transfer tubes near the first side wall to prevent the portions of the heat transfer tubes near the first side wall from descending below a first predetermined height.

Heat exchanger and water heating device including the same

A heat exchanger including a gas inlet through which a combustion gas flows in and a gas outlet through which the combustion gas flows out is provided. The heat exchanger includes a housing in which the gas outlet is formed, a partition member, and a plurality of heat transfer tubes accommodated in the housing. The partition member is mounted in the housing so that there is a portion in which a flow area of the combustion gas is smaller than that of the gas inlet between the gas inlet and the gas outlet.

Heat exchanger and water heating apparatus

A water heating device includes: a heat exchanger having a case to which heating air is supplied, and heat transfer pipes accommodated inside the case; and a straightening vane arranged on the downstream side in a heating air flow direction of the heat transfer pipes, and having a plurality of vent holes. The heat transfer pipe includes a plurality of pipe body portions that extend along a direction intersecting the heating air flow direction and approach the straightening vane. The plurality of vent holes are arranged so as to overlap the plurality of pipe body portions in the heating air flow direction.

Water heating device

The heat exchange device () includes a primary heat exchanger (), a secondary heat exchanger (), and a connecting pipe (). The connecting pipe connects the primary heat exchanger and the secondary heat exchanger. The primary heat exchanger () includes a primary heat exchange part (), a shell plate () surrounding the primary heat exchange part, and a body pipe part () for cooling the shell plate. The body pipe part () is disposed closer to a burner than the primary heat exchange part () and is connected to the connecting pipe (). The primary heat exchange part () includes a first heat transfer tube part () connected to the body pipe part (), and a second heat transfer tube part () connected to the first heat transfer tube part and disposed on a side opposite to the body pipe part with respect to the first heat transfer tube part.

Growing community of inventors

Akashi, Japan

Naoya Shiotsu