Water Heater System Having Venturi Draw System

摘要

A water heater system comprises a water tank, a burner plenum, a flue, and a dilution air blower system. The dilution air blower system comprises a blower, a dilution air passageway, and a venturi system. Air from the blower is forced through the dilution air passageway and discharged toward the venturi system. When the dilution air blower system is attached to the water heater system, air discharged from the dilution air discharge passage via the blower passes through a converging region, throat region, diverging region and exit passage of the venturi system and draws combustion products through the flue and out the venturi system.

主权项

1. A water heater system comprising a water tank, a burner plenum adjacent the water tank, a fuel burner within the burner plenum, a flue, a blower adapted and configured to blow air, a dilution air passageway, and a venturi system, the fuel burner being configured and adapted to combust fuel to produce hot combustion products, the flue having an upstream end and a downstream end, the upstream end of the flue being in fluid communication with the burner plenum, the flue being configured for passage of combustion products from the burner plenum through the water tank and toward the downstream end of the flue, the venturi system including a converging region, a throat region downstream of the converging region, a diverging region downstream of the converging region, and an exit passage downstream of the converging region, the dilution air passageway having a dilution air intake passage and a dilution air discharge passage, the dilution air passageway being in fluid communication with the blower, the blower and dilution air passageway being adapted and configured such that air from the blower is blown through the dilution air passageway and discharged via the dilution air discharge passage, the dilution air passageway being positioned relative to the converging region of the venturi system and configured such that air discharged from the dilution air discharge passage is directed downstream toward the converging region of the venturi system, the water heater system being adapted and configured such that air discharged from the dilution air discharge passage via the blower passes through the converging region, throat region, diverging region and exit passage of the venturi system and draws combustion products through the flue such that such combustion products pass through the converging region, throat region, diverging region, and exit passage of the venturi system, whereby air entering the converging region of the venturi system via the dilution air passageway and combustion products entering the converging region of the venturi system via the flue are discharged together via the exit passage of the venturi system.