Noritz Corporation

Hiroshi Asakura

Kazuhiro Kimura

Akira Tsutsumi

Nobuhiro Takeda

Hironao Matsunaga

Shuji Kameyama

Toshihiro Hori

Keiichi Amada

Ichiro Ootomo

Takayasu Fujita

Shigehiro Yamamoto

Masakuni Morikawa

Masamitu Ishikado

So as to provide a latent heat recovery-type water heater capable of certainly preventing drain generated by heat exchange from being discharged out of an exhaust portion through an outlet with entrained by a flow of combustion gas, an exhaust portionis formed by an exhaust portion constituting-bodyattached above a secondary heat exchanger. The exhaust portionincludes therewithin a deflectorand a distribution boardopposed to the deflector. The deflectorhas a deflection boardextending substantially vertically downward from a top faceof the exhaust portion, so as to form a gapbetween a lower end of the boardand a bottom faceof the exhaust portion. A flowing direction of combustion gas introduced into the exhaust portionthrough an openingof the bottom faceis deflected by passing through the gap, and the combustion gas flows toward the distribution board. The combustion gas hits on the distribution boardto be distributed within the exhaust portion, thereafter being discharged through an exhaust opening

Latent heat recovery-type water heater

A heating apparatusincludes a shell, a primary heat exchanger (sensible heat exchanger), a burner (combustion means), and a fan. A secondary heat exchanger (latent heat exchanger)has a plurality of heat receiving tubesarranged in parallel between a pair of headersand, the heat receiving tubesbeing fixed to tube plates. The heat receiving tubesare bare tubes without fins and are arranged across flow of combustion gas. The number of the tubesarranged vertically is less than the number of the tubesarranged horizontally.

Heating apparatus

A secondary heat exchanger B for recovering latent heat from combustion gas includes water tubeseach of which is so inclined that a first endis positioned lower than a second end. Therefore, in draining water from each of the water tubes, water can be caused to flow smoothly into a water-inflow and hot-water-outflow headerA connected to the first ends. The secondary heat exchanger B includes a casingwhich includes an upper walland a bottom wallwhich are so inclined that the inner surfaces thereof extend generally in parallel with the water tubes, and the upper and the lower gapsandhave constant widths sand s. Therefore, the amount of heat recovery from the combustion gas passing through the gapsandcan be increased.

Water heater

Growing community of inventors

Hyogo, Japan

Hiroshi Asakura