Reservoir type water heating device

A reservoir type water heating device comprising:

• a closed end drum having a hot water reservoir located therein for accumulating a specified quantity of water, said drum including a convex shaped heated surface member at the bottom which is convex toward the interior thereof through which said water is heated;
• a water feed pipe connected to and communicating with said hot water reservoir for supplying cold water to said reservoir and located at the lower portion of said drum at the same vertical level to said convex shaped heated surface member for having said water strike against the lateral side of said convex shaped heated surface member for slowing the flow speed of said cold water and preventing mixing of said cold water with hot water at a higher portion in said closed end drum;
• a hot water pipe for supplying hot water from said reservoir connected to and communicating with said reservoir at the top thereof for having said hot water forced upward and out through said hot water pipe by said cold water supplied at the lower portion of said drum;
• fuel combustion means disposed outside of said hot water reservoir and below said reservoir, said fuel combustion means having a combustion chamber at the bottom of said drum for heating water within said reservoir through said convex shaped heated surface member and thereby having combustion products formed within said chamber;
• and
• an exhaust passageway directly connected to said combustion chamber for exhausting said combustion products from said chamber, said exhaust passageway being disposed and extending away from said chamber in spaced relationship with said reservoir so as to not come in contact with said water.