Induced draft combustion water heater
AssigneeSABH (U.S.) Water Heater Group, Inc.
InventorH. Jack Moore, Jr.
Life of this patent
Estimating the term…
Abstract
A water heater includes a tank and an exhaust blower is located below the tank and connected to the exhaust line to draw the combustion products by suction through the coil-shaped heat exchanger, through the combustion gases conduit and through the combustion chamber and to draw fuel and air into the burner through the inlet conduit.
Claims17
In a water heater comprising a tank, a fuel burner, an inlet conduit connected to said burner, a combustion chamber located within said tank for containing hot combustion gases from said fuel burner, a convoluted combustion products heat exchanger conduit connected to said combustion chamber and extending downwardly in said tank and through an outlet located at a lower portion of said tank to cool the hot combustion gases and transfer heat to the water in said tank, wherein condensate is formed as a result of said cooling of said hot combustion gases, the combination which comprises:
- (a) a generally upright exhaust line connected to said outlet to receive the resulting cooled exhaust gases and condensate from said heat exchanger, and
- (b) an exhaust blower located below said tank and being continuously operative during fuel combustion, said exhaust blower connected to said generally upright exhaust line for creating negative pressure by drawing said combustion products by suction through said heat exchanger, through said combustion gases conduit and through said combustion chamber and positioned to draw combustion air into said burner through said inlet conduit.
In a water heater comprising a tank, a fuel burner, an inlet conduit connected for introducing fuel and air into said burner, a combustion chamber located within said tank for containing hot combustion gases from said fuel burner, a hot combustion gases conduit extending upwardly in said tank from said combustion chamber, a convoluted combustion products heat exchanger conduit connected to said combustion gases conduit and extending downwardly in said tank and through an outlet located at a lower portion of said tank to cool the hot combustion gases and transfer heat to the water in said tank, wherein condensate is formed as a result of said cooling of said hot combustion gases, the combination which comprises:
- (a) an exhaust line connected to receive the resulting cooled exhaust gases and condensate from said heat exchanger, and
- (b) an exhaust blower located below said tank and continuously operative during fuel combustion, said exhaust blower connected to said exhaust line for creating negative pressure by drawing said combustion gases by suction through said heat exchanger, through said combustion gases conduit and through said combustion chamber and to draw said fuel and air into said burner through said inlet conduit means, wherein said exhaust blower and exhaust line are positioned at an effective distance below said tank to separate condensate from the cooled combustion gases, and wherein means are provided for removal of said condensate from said cooled combustion gases, said removal means being connected below said exhaust blower to remove said condensate from the water heater and including a pump connected to said removal means to pump said condensate.
A water heater comprising:
- a water tank, a burner, an inlet conduit connected to said burner, a combustion chamber located within said tank, a convoluted combustion products heat exchanger conduit connected to said combustion chamber and extending downwardly in said tank and through an outlet located at a lower portion of said tank, a generally upright exhaust line connected to said outlet to receive resulting cooled exhaust gases and condensate from said heat exchanger conduit, and an exhaust blower located below said tank and being continuously operative during fuel combustion, said exhaust blower connected to said generally upright exhaust line for creating negative pressure by drawing said exhaust gases by suction through said heat exchanger conduit and said combustion chamber.
A water heater comprising a housing, a water tank positioned above said housing, a burner, an inlet conduit connected to said burner, a combustion chamber located within said tank, a convoluted combustion products heat exchanger conduit connected to said combustion chamber and extending downwardly in said tank and through an outlet located at a lower portion of said tank, an exhaust line connected to said outlet to receive resulting cooled exhaust gases and condensate from said heat exchanger conduit, and an exhaust blower located within said housing and below said tank and continuously operative during fuel combustion, said exhaust blower connected to said exhaust line for creating negative pressure by drawing said exhaust gases by suction through said heat exchanger conduit and said combustion chamber.
A water heater comprising a water tank, a burner, an inlet conduit connected to said burner, a combustion chamber located within said tank, a convoluted combustion products heat exchanger conduit connected to said combustion chamber and extending downwardly in said tank and through an outlet located at a lower portion of said tank, an exhaust line connected to said outlet to receive resulting cooled exhaust gases and condensate from said heat exchanger conduit, and an exhaust blower located below and laterally within the periphery of said tank and being continuously operative during fuel combustion, said exhaust blower connected to said exhaust line for creating negative pressure by drawing said exhaust gases by suction through said heat exchanger conduit and said combustion chamber.
Dependencies are inferred from the claim text.