| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vacuum type water wamer capable of improving heat exchange efficiency without concentrating a gas flow in a gap from the wall face of a combustion chamber to a finned heat transfer tube. <P>SOLUTION: A vacuum type water warmer includes a can body in which a heat medium is enclosed so as to cover a combustion chamber and a heat transfer tube. The vacuum type water warmer includes: a burner that has a combustion chamber for burning fuel and a decompressed steam chamber in which a gas that has evaporated a heat medium under a decompressed state and a heat exchanger capable of exchanging heat in the can body and burns the fuel at the front of the combustion chamber; a discharge part for discharging combustion exhaust gas produced on the back wall of the combustion chamber by burning fuel by the burner; a plurality of finned heat transfer tube so that a combustion exhaust gas flow direction and a tube diameter direction face each other between the burner and the discharge part at the back of the combustion chamber; and a gas passage inhibition member for keeping the combustion exhaust gas from passing through the gap between the finned heat transfer tube at the inner wall side of the combustion chamber and the wall of the combustion chamber. <P>COPYRIGHT: (C)2012,JPO&INPIT |
