| 摘要 |
A thermally actuated deflector structure for automatically varying the air discharge pattern of a ceiling diffuser in response to a sensed change in the temperature of air being delivered to the diffuser includes a multi-bladed damper assembly positioned over a central outlet portion of the diffuser and having a frame portion secured to the diffuser. The blades in the damper assembly are drivable between a cooling orientation in which they block the central diffuser portion and preclude supply air flow downwardly therethrough, and a heating orientation in which they uncover the central diffuser portion and permit supply air flow downwardly therethrough. A coiled bimetallic actuating strip is positioned above the damper assembly and has an inner end anchored to the damper frame, and an outer end secured to a drive member linked to the damper blades. A change in the temperature of air being delivered to the diffuser is sensed by the strip which, by thermally actuated deflection of its outer end, drives the damper blades to their heating orientation when heated air is being delivered to the diffuser, and drives the damper blades to their cooling orientation when cooled air is being delivered to the diffuser.
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