Method and apparatus for converting a fixed-opening air diffuser to an individually-controlled variable air volume diffuser
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United States of America Patent
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-
Nov 22, 1994
Issued Date -
N/A
app pub date -
Dec 6, 1993
filing date -
Apr 26, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for converting a fixed-opening air diffuser (21) to an individually-controlled variable air volume diffuser. The fixed-opening diffuser (21) includes a diffuser housing (26) mounted to a support structure (25) and coupled to receive air from a supply conduit (24) positioned behind the support structure (25) and a diffusion assembly (27) mounted across the housing (26) to distribute the air from the housing (26). The method includes the steps of removing the diffusion assembly (27) from a position across the diffuser housing (26) to provide access to the housing, mounting a thermally-powered diffuser actuator assembly (31) having a movable vane (32) coupled to actuator assembly (31) inside the diffuser housing (26) in a position for control of air discharged from the diffuser housing (26) by thermally-driven displacement of the vane (32). Each of the steps of removing and mounting is accomplished while maintaining the diffuser housing (26) in place in the support structure (25) and while maintaining the support structure (25) in a substantially undisturbed state to minimize the release of dangerous materials possibly present in the support structure (25).
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