The present invention relates to a valve assembly (1) for an air duct for ventilation of a building, comprising a valve (10; 100), a housing (40), and an electrical body (20) provided within said housing. The valve (10, 100) comprises adjustment means to adjust the position of flow regulating means (113, 126) of the valve (10; 100), wherein the position of the flow regulating means (113, 126) is configured to adjust the size of a gap (50) between the valve (10; 100) and the outer circumference at the distal end of the electrical body (20), regulating a flow or pressure of air flowing through the valve (10; 100), wherein the size of the gap (50) is measured perpendicular to the outer circumference as the smallest distance from the distal end of the electrical body (20) to the flow regulating means (113, 126) of the valve (10; 100).

An air conditioner indoor unit includes a back plate assembly, a top cover assembly having a part connected to a top wall of the back plate assembly, and a panel assembly. The panel assembly includes a first panel connected to the back plate assembly and including a first air outlet and a second air outlet arranged below the first air outlet, a second panel disposed below the first panel, a door mounting plate disposed at rear of the first panel and including a guiding groove, a door coupled to the door mounting plate and movable relative to the door mounting plate to open or close the first air outlet, and a guiding post arranged at the door and configured to extend into and slide relative to the guiding groove. The back plate assembly, the top cover assembly, the first panel, and the second panel are connected one to another.

The invention is directed to a handle assembly for rotating a pivot rod attached to a damper within ductwork, for the purpose of controlling the flow of conditioned air therethrough. In particular, the present invention provides a pre-assembled portion of the required parts, thereby reducing the number of steps required for final assembly of the damper handle to the pivot rod, resulting in a significant time savings.

A hinge assembly includes a pair of lower mounting brackets, at least two upper hinge leaves, a pair of side brackets coupled to the sidewalls of the ventilation fan lid, each side bracket having at least one third axle hole therethrough, an axle pivotally coupling the upper hinge leaves to the lower mounting brackets. Each lower mounting bracket has a vertically oval-shaped axle hole. Each upper hinge leaf includes a U-shaped mounting member and a hook shaped clamping plate coupled to the U-shaped mounting member through threaded tension bolts. The upper hinge leaf also has a pair of axle holes. The axle extends through the elongated axle holes of the lower mounting bracket vertical flange and through the axle holes of the U-shaped member.

Embodiments of the present disclosure are directed to collapsible hood for a heating and cooling system that includes a plurality of panels configured to couple to a housing of the heating and cooling system, wherein the plurality of panels is configured to be translated between a collapsed position and an open position, wherein the plurality of panels is substantially flush against the housing in the collapsed position to configure the heating and cooling system for transportation, and wherein the plurality of panels are configured to extend from the housing to protect openings in an air intake of the housing and to allow passage of air through the air intake in the open position.

A backdraft damper for permitting a flow of air in an outflow direction and preventing the flow of air in a backdraft direction, including a frame having a transverse opening allowing the passage of air through the frame; a plurality of blades, each blade extending across the frame and mounted to the frame about a central portion by pivot members, for rotation between an open position in which the blade allows air to flow through the frame and a closed position in which the blade blocks air from flowing through the frame, the plurality of blades including one or more first blades arranged to rotate in a first direction from the closed position to the open position; one or more second blades arranged to rotate in a second direction opposite to the first direction from the closed position to the open position; the backdraft damper further including a linkage between the one or more first blades and the one or more second blades to cause the first and second blades to together rotate between the closed and open positions; and the one or more second blades being more balanced about respective pivot members than the one or more first blades thereby to permit the one or more first blades to bias the entire plurality of blades to the closed position while being movable to the open position by the force of air flowing through the frame in the outflow direction.

A dynamic register system automatically adjusts venting panels attached to an air vent in order to evenly disperse the air supplied by the vent in a room. The dynamic register system includes a fan internally mounted within the air vent. The air supplied by the air vent causes the fan to turn providing the system with mechanical energy. The fan is then attached to a gear system which in turn is attached to an adapter. The gear system then translates the rotational mechanical energy of the fan into an oscillating motion for the adapter. The adapter is then mounted to an axle which engages with the venting panels attached to the vent. As the adapter oscillates the axle is adjusted which in turn adjusts the venting panels periodically to evenly distribute air.

The present invention is relative to a damper (5) adapted to regulate an air flow orifice (7) for passing of an air flow in a ventilation duct (2), wherein the damper (5) comprises a plate (11), a regulating device (12) and a mounting element (13), wherein the mounting element (13) is resilient and comprises a first and a second end (19, 20), the distance (L1, L2) between the first and the second end (19, 20) being arranged to change when the mounting element (13) bends resiliently, and wherein the first and a seconds end (19, 20) are adapted to cooperate with an inside of the ventilation duct (2) to removably mount the damper (5) in the ventilation duct (2), and a ventilation system (1) comprising such a damper (5).

A control device (10′) comprises a control unit (10′) with a control element for controlling a fluid flow and being rotatable about a first axis (13) between an open position and a closed position, and further comprises a separate motor-driven actuator unit (24), which is mechanically coupled to said control unit (10′) to rotate said control element about said first axis (13) in a controllable fashion, whereby said actuator unit (24) comprises a driving part (25) with a driving element (31) being rotatable about a second axis (26), to be mechanically coupled to said control element in a coupling position to rotate said control element about said first axis (13), and a control part (28) for driving said driving element (31) in a controllable fashion.

An easy and space-saving assembly is achieved having said driving element (31) removable coupled to said control unit (10′) by means of a spur gearing (Hirth serration) (22).

A damper arrangement is described which moves dampers from a location closer to an air source to a boot located adjacent to a ceiling register, grill, or the like, thereby allowing technicians or owners to more readily make adjustments. A substantially flush boot collar mounting preserves leak free flow, and keeps insulation installation simple. An internal adjustment mechanism, such as a loop, avoids the need to pull the ceiling grill from the ceiling. Both insulation and subsequent adjustment are simplified.