CONDENSING GAS BOILER WITH CORROSION-RESISTANT STRUCTURE BY DIFFERENT METAL

Japanese Patent JP3944147

B2

PROBLEM TO BE SOLVED: To provide a condensing gas boiler with a corrosion-resistant structure by different metals.
SOLUTION: This gas boiler has: sensible heat part heat exchangers 20 disposed inside a casing 10 provided with a combustion chamber 12 thereinside, each composed of a pipe-like first tube which is made of a copper material having a plurality of first heat pins; latent heat part heat exchangers 30 each composed of a pipe-like second tube having a plurality of second heat pins, and has the inside made of a copper material and the outside made of an aluminum material; side plates 21, 31 mounting the sensible heat part heat exchangers 20 and the latent heat part heat exchangers 30 inside the casing with the sensible heat part heat exchangers 20 and the latent heat part heat exchangers 30 respectively fixedly disposed in line, contacted with and fastened to each other; and a plurality of connection pipes 24, 34 mutually connected into the sensible heat part heat exchangers and the latent heat part heat exchangers through connection parts. The connection pipe having a high corrosion-resistant material is mounted such that the connection pipe occupies a large area, while the connection pipe having a low corrosion-resistant material is formed such that its area is small. An insulation means is provided between the side plates such that the side plates are electrically insulated from each other.

Woo Suk Fu
Yun Churu Shin

JP2003344640A

July 11, 2007

October 02, 2003

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Keito Navien Co., Ltd.

F24H9/00; F28F19/00; F24H1/40; F24H8/00; F28F1/00; (IPC1-7): F28F19/00; F24H9/00; F28F1/00

JP2003185388A
JP6115044A
JP2002257496A
JP2002257482A

US6907846

Yusuke Hiraki
Sekiya Mitsuo
Yasushi Hayakawa

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