Damper vane and housing construction

摘要

A damper having a housing includes a rotatable damper vane therein constructed to minimize the passage of air between the vane and the housing when the vane is in a closed position. The housing includes a pair of opposed walls having a channel or flute therein adjacent outer edges of the vane when the vane is in the closed position. The outer edges of the vane terminate in domed or arcuate shaped surfaces that generally correspond with the channel. The arcuate shaped surfaces are a distance apart that is greater than a distance between the opposed walls such that the arcuate shaped surfaces are received in the channels when the vane is in the closed position. The housing also includes a pair of opposed sidewalls having a ridge therein at a location that aligns with an edge of the vane when the vane is in the closed position.

主权项

1. A damper comprising:
a housing having an upper wall, a lower wall, a first sidewall, and a second sidewall, wherein the upper wall is spaced apart from and generally faces the lower wall, wherein the first sidewall is spaced apart from and generally faces the second sidewall, wherein the upper and lower walls are connected to the first and second sidewalls, wherein the upper and lower walls and the first and second sidewalls cooperate to define an air passage therethrough, and wherein the upper and lower walls include a channel; and a damper vane positioned in the air passage and rotatably connected to the housing, wherein the vane includes a central axis about which the vane rotates, wherein the vane includes outer edges spaced apart from and on opposite sides of the central axis, wherein the central axis is aligned with the channels in the upper and lower walls, wherein the upper and lower walls are space apart a first distance, wherein the channels are spaced apart a second distance, wherein the outer edges are space apart a third distance, wherein the first distance is less than the third distance, and wherein the second distance is greater than the third distance, whereby the outer edges of the vane are received in the channels when the vane is in a closed position.