System for controlling automatically the setting of a damper...

Details System for controlling automatically the setting of a damper... System for controlling automatically the setting of a damper...

F - Mech Eng,Light,Heat,Weapons

24

F

98/18

F24F 11/047 (2006.01) F24F 11/02 (2006.01) G05D 16/16 (2006.01) G05D 16/20 (2006.01)

Patent

CA 1296562

Abstract The invention relates to a control system for adjusting the setting of a damper (9) in a ventilation duct (8) and maintaining a substantially constant pressure at a selected region in the ventilation duct, the system com- prising a cylinder (1) having a vertical cylinder axis and housing a readily movable, pressure-responsive device (2), which together with the cylinder defines a pressure space. The pressure space (22) communicates with the ventilation duct at the aforementioned selected region, and drive means (11, 12) are provided for adjusting the damper setting in response to the position of the pres- sure-responsive device, so as to maintain a constant pressure. The inventive system is characterized in that the pressure-sensitive device (2) has a mass which cor- responds to a selected pressure at the aforementioned region in the duct and is intended to balance the pres- sure force acting on the device. Figure 1

562001

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