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US 4,444,156 AGranted
Water heater
AssigneeKabushiki Kaisha Youei Seisakusho
InventorsYasutaka Iwasaki, Mitsuru Tanaka, Akihiko Yasuda, Munetaka Kinugasa, Toshihiko Kikuchi, Masao Maruyama
Life of this patent
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Abstract
A water heater of the combustion type having a collecting assembly for collecting the drain water resulting from combustion to prevent corrosion of components of the heater by the drain water.
Claims1
A water heater comprising:
- a heat exchanger through which water is passed;
- a burner for generating hot combustion gases;
- means for directing the hot gases over said exchanger to heat the water therein whereby acidic condensate is formed on said exchanger;
- means for collecting the acidic condensate on said exchanger;
- and
- drain means connected to said collecting means;
- characterized in that:
- an acid neutralizing unit is connected into said drain means and comprises a box-shaped case having therein drain channel means, including a plurality of downwardly inclined drain courses series connected in zigzag form with a gentle slope for each course, the lower surface of each of said courses being provided with a plurality of arc-like recesses with the axes thereof extending transversely of the corresponding course, said box-shaped case being formed of plastic material and including a cover of transparent material forming a side wall of each of said courses, and a solid piece of acid-neutralizing magnesium in each of said recesses.
5 more elements
Dependencies are inferred from the claim text.