| 摘要 |
A dilution air blower that has a reverse-mounted impeller contained within a combined blower housing and impeller housing. The impeller includes a vented backplate that is positioned to face a base opening of the blower housing that receives the exhaust gas from an appliance, such as a water heater. Rotation of the impeller causes the impeller to draw in a supply of dilution air which passes over the blower motor. The dilution air mixes with the exhaust gases within the mixing chamber of the impeller. The mixture of gases is discharged radially from the impeller through an exhaust outlet. The invention eliminates the need for fans dedicated to cool the blower motor while providing the required mixture of the exhaust gases and the dilution air.
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