Patent ID: 6564755
Filing Date: 2003-05-20
Classification: F24D,F28D,F28F,Y02B,Y10S

Abstract:
A water heating assembly comprising:a furnace for discharging hot exhaust gases and having a flue pipe for discharging said hot exhaust gases, said flue pipe having an axial passage with an inlet end for receiving said hot combustion gases and an outlet end for discharging said hot combustion gases, said flue pipe having an outer surface and an inner surface defining said axial passage, and a first baffle member coupled to said inner surface of said flue pipe and extending inwardly into said axial passage to produce turbulence of said exhaust gases flowing through said axial passage; a substantially cylindrical sleeve having an upstream end at said upstream end of said flue pipe and a downstream end at said downstream end of said flue pipe, said sleeve being spaced outwardly from said flue pipe to define a water jacket in contact with and surrounding said flue pipe; an inlet pipe coupled to said downstream end of said sleeve for feeding water into said water jacket; an outlet pipe coupled to said upstream end of said sleeve for discharging water from said water jacket; a plurality of water tanks arranged parallel to each other and connected together in series for feeding water sequentially through each of said water tanks, said water tanks being in heat exchange contact with said sleeve and being arranged to surround said sleeve, at least one of said water tanks being connected to said inlet pipe of said water jacket; a first heat exchange pipe encircling said flue pipe a plurality of turns at said downstream end and being in heat exchange contact with said flue pipe, said first heat exchange pipe having an inlet end connected to a water supply and an outlet end coupled to at least one of said water tanks; and a second heat exchange pipe encircling said flue pipe a plurality of turns at said upstream end and being in heat exchange contact with said flue pipe, said second heat exchange pipe having an inlet end coupled to said outlet pipe for receiving water from said water jacket and an outlet end for supplying hot water.