| 摘要 |
A liquid heating apparatus (1) is provided in which fins are directly secured and fixed at the bottom portion ofa liquid tank (4) to ensure sufficient heat efficiency with production cost reduced by simplification of the construction thereof and with maintenance being easily carried out. In the liquid heating apparatus which raises the temperature of liquid in a liquid tank by heating the bottom of said liquid tank with a burner disposed downward of the bottom of said liquid tank, an inclination plane (6) which is inclined at a predetermined degree of angle and is formed on the bottom of said liquid tank, and long fins (8) are fixed on the rear side of said inclination plane along the inclination direction thereof. The fins are provided with thermal expansion absorbing capabilities along the lengthwise direction thereof. The fins can be formed with channel-like cross sections, and the bottom wall portions thereof are fixed close to the rear side of the inclination plane of the liquid tank. The thermal expansion absorbing means can be slits (9) formed at the side wall portions protruding from the rear side of the inclination plane of the fins or can be formed of protrusion dimension differences at both end portions in the lengthwise direction of the fins. <IMAGE> |
