| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of a heat exchanger for hot water capable of assuring combustion performance and heat exchange rate. SOLUTION: This structure of the heat exchanger for hot water comprises a combustion chamber 2 formed in a cylindrical shape and having a water chamber 1 therearound, a burner 3 installed at the side wall 2a of the combustion chamber through the water chamber 1, and an exhaust gas chamber 4 adjacent to the water chamber top board 1a of the water chamber 1. A resistance body 6 is disposed in a large number of cylindrical flue tubes 5 connected between a combustion chamber top board 2b and the water chamber top board 1a. The resistance body 6 comprises a plate-like body 6a installed in the longitudinal direction of the flue tubes 5, a large number of semi-circular large plates 6b formed by bending to the plate-like body 6a at specified intervals in alternating directions, small plates 6c formed by bending to the opposite side of the large plates 6b through the large plates 6b and a step part 6e with a specified height, and a gas flow hole 6d allowing the combustion gas to pass therethrough. A gas passing clearance 7 is formed between the front and side of the small plates 6c and the passage wall 5a of the flue tubes 5, the combustion gas is passed through the gas passing clearance 7 to raise the combustion gas along the passage wall 5a. Thus, since a heat exchange area acts effectively, the heat exchange rate can be increased. COPYRIGHT: (C)2006,JPO&NCIPI
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