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US 7,108,478 B2Granted
Blower housing and cabinet with improved blower inlet airflow distribution
AssigneeAmerican Standard International Inc.
InventorStephen S. Hancock
Life of this patent
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AssigneeAmerican Standard International Inc.
InventorStephen S. Hancock
Estimating the term…
An airhandling unit for an HVAC system includes a cabinet having an electric motor driven centrifugal blower disposed therein. The blower includes a scroll or volute type blower housing which may be formed of opposed releasably connectable housing parts. The blower housing parts include opposed sidewalls with axially extending compound curved portions which cooperate with an end wall which is configured to have portions which are not of substantially constant increasing radial distance from the blower impeller axis of rotation. However, a constantly increasing airflow cross-sectional flow area is provided within the blower housing for blower discharge air. The disposition of the blower housing sidewalls with respect to the cabinet walls provides improved airflow distribution for air flowing into the blower air inlet openings.
In an air handling unit for an HVAC system, a combination comprising a cabinet including an air inlet opening and an air discharge opening, a centrifugal, motor driven air handling blower disposed in said cabinet, said blower including a blower housing having opposed sidewalls, portions of which extend axially with respect to an axis of rotation of an impeller of said blower in opposite directions toward opposed walls of said cabinet providing a flow path for air flowing into said cabinet and into at least one air inlet opening of said blower and providing for distribution of airflow entering said inlet opening of said blower with respect to said axis along flow streamlines which extend to said inlet opening substanially all of said inlet opening;
In an air handling unit for an HVAC system, a combination comprising a cabinet including an air inlet opening and an air discharge opening, a centrifugal, motor driven air handling blower disposed in said cabinet, said blower including a blower housing having opposed sidewalls, each having a generally circular air inlet opening formed therein, plural spaced apart portions of said blower housing sidewalls extending axially with respect to an axis of rotation of an impeller of said blower in opposite directions toward opposed walls of said cabinet and providing a flow path for air flowing into said cabinet and into one of said air inlet openings of said blower which distributes airflow entering said at least one inlet opening of said blower with respect to said axis along flow streamlines which extend over substanially all of said at least one inlet opening;
An HVAC apparatus including a combination comprising a generally rectangular cabinet including an air inlet opening and an air discharge opening, a centrifugal, motor driven air handling blower disposed in said cabinet, said blower including a blower housing having opposed sidewalls each having a blower air inlet opening formed therein, each of said blower housing sidewalls include circumferentially spaced apart portions which extend axially with respect to an axis of rotation of an impeller of said blower in opposite directions toward opposed walls of said cabinet and providing a flow path for air flowing into said cabinet and into said air inlet openings of said blower whereby airflow entering said inlet openings of said blower housing is distributed over substanially all of said air inlet openings of said blower housing, respectively;
Dependencies are inferred from the claim text.