Temp. operated ventilation flap controller - has bellows extended by expanding fluid, with rod controlling swinging arm connected to flaps

摘要

The automatically operating device for controlling swinging flaps for air conditioning grids, is operated by temperature changes. It carries a swinging arm (29) which can be connected to a support with the flaps attached. The flaps control discharge through an overhead air diffuser, to concentrate or diffuse the discharged air or a vertical diffuser, to control the angle of discharge. The device can have a cylinder with a lower part (13) forming a chamber for a fluid (15) which expands when heated. This part carries horizontal fins (33). The upper part houses a bellows (17) against which the fluid can act, extending it when expanded, lifting an arm (25) on top, which tilts the swinging arm. A return spring (23) fits around a piston (19) enclosing the top of the bellows.