초록 ▼

A blower draws air through an inlet duct from outside a building or dwelling and injects air and fuel into a sealed combustion chamber where they are ignited and burned within a ceramic crucible within combustion chamber. The pressurized combustion gases flow up an exhaust stack in the water tank of

A blower draws air through an inlet duct from outside a building or dwelling and injects air and fuel into a sealed combustion chamber where they are ignited and burned within a ceramic crucible within combustion chamber. The pressurized combustion gases flow up an exhaust stack in the water tank of the water heater. The exhaust stack is connected to a vent that extends through a building outside wall. The vent is surrounded by the inlet duct which has an opening spaced from the outlet vent so that air from the vent is not captured by the inlet. The combustion chamber and the heat exchanger are sealed from the interior of the building and both the air inlet to the blower and the air outlet from the heat exchanger freely communicate to the outside of the building. A timer within the controller operates the blower for a period of time after the fuel supply to the burner has been shut off. This operation of the blower assures that residual heat within the combustion chamber is transferred to the water in the tank.

대표청구항 ▼

[ I claim:] [6.] A water heater mounted interiorly to a building and having a flue that extends through an exterior wall of the building comprising:a water tank;a combustion chamber mounted beneath the water tank and sealed to the tank;a ceramic crucible mounted within the combustion chamber, the cr

[ I claim:] [6.] A water heater mounted interiorly to a building and having a flue that extends through an exterior wall of the building comprising:a water tank;a combustion chamber mounted beneath the water tank and sealed to the tank;a ceramic crucible mounted within the combustion chamber, the crucible having a bottom surrounded by an upwardly extending side wall;a stack extending upwardly from the combustion chamber and through the water tank in heat exchanging relation to the water tank;a burner equipped with a fan and a fuel supply valve, the fan and fuel supply valve providing a combustible mixture to the crucible through an opening in the wall of the crucible within the combustion chamber;a flue extending through an exterior wall, the flue having an inner exhaust pipe and an outer coaxial air inlet pipe, the exhaust pipe extending to an exhaust outlet exterior to the dwelling, the outlet being surrounded by a coaxial air inlet pipe extending to an air inlet exterior to the dwelling and closely spaced from the exhaust outlet;a temperature resistant duct communicating in sealed relation between the stack and the exhaust pipe;a duct communicating between the burner fan and the air inlet pipe to supply air to the burner and the combustion chamber.