Disclosed are provided indoor unit of an air conditioner. A present invention is to provide an indoor unit of an air conditioner having an improved structure for preventing vibrations and noise of a blade due to vibrations of a motor when the blade rotates, and a blade unit applied to the indoor unit. The indoor unit of the air conditioner includes a main body including an outlet, and a blade unit configured to adjust a direction in which air discharged from the outlet is discharged, wherein the blade unit comprises, a blade coupled with the main body to be rotatable in the outlet, a motor including a rotation transfer member, and configured to generate a rotatory force that is transferred to the blade; and a buffer member made of a material having a restoring force, coupled with the blade at one end, and surrounding a part of the rotation transfer member.

A hvac damper control is described. In an example, an apparatus comprises a manual actuator, wherein in a manual use of the manual actuator, the manual actuator is configured to open a hvac damper to an open position and close the damper to a closed position. The apparatus comprises an actuator coupled to a manual actuator, wherein the actuator is configured to open and close the hvac damper by being connected to the manual actuator. When the actuator is connected to propulsion, the actuator is configured to drive itself to the open position, wherein the actuator is configured to lock to the manual actuator. In other examples, a method, a hvac damper, and a hvac system are discussed along with the features of the apparatus.

An illustrative damper system includes a damper blade that is configured to be positioned within a duct, such as a bypass duct of an HVAC system. A shaft is in communication with the damper blade, a torsion spring is in communication with the shaft, and a force adjustment mechanism is in communication with the torsion spring. The shaft, the damper blade, and the torsion spring may be configured such that the shaft may affect movement of the damper blade about a rotation axis and the torsion spring may provide a bias force to the shaft for biasing the damper blade toward a desired position (e.g. closed position).

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 window-shades mechanism with an anti-backflow function is applied to a fan device and an electronic apparatus. The window-shades mechanism includes a supporter, a blade, a shaft and a connecting rod. The blade is disposed inside the supporter and includes two sides. Each side includes a first region and a second region. The shaft is connected to the supporter and the blade. The connecting rod is connected to the second region on the side of the blade. The connecting rod has a holding portion. When the connecting rod is moved by the holding portion, the blade is driven to rotate relative to the supporter via the shaft.

A damper regulator for controlling the opening/closing characteristics of an HVAC damper has a swing arm coupled to the shaft on which the damper pivots. The swing arm has an arm carriage mounted to translate on the swing arm as the swing arm pivots, and a biasing spring connects the arm carriage to the damper regulator's housing, or to another suitable anchor. The translation of the arm carriage effectively adapts the characteristics of the biasing spring so that the damper need not be subjected to ever-increasing pressure to achieve greater airflow, or so that other damper opening characteristics can be achieved.

An air flap device comprises a housing with an air flow passage section. At least one air flap is mounted on a first and on a second mounting point on the housing. The second mounting point is located at an axial distance from the first mounting point. The air flap is rotatable around the pivot axis defining the axial direction. By pivoting the at least one air flap relative to the housing, the effective flow cross-section of the air flow passage section can be modified. The air flap(s) is mounted on the mounting points with an axial play relative to the housing. At least one spring assembly is arranged such that at least one part of an axial movement of the air flap(s) occurs within its play relative to the housing in the direction of the first or/and the second mounting point, against a pre-tensioning effect of the spring assembly.

An HVAC actuator that includes a motor to assist in driving an HVAC component between a first end stop and a second end stop, a return spring configured to provide a bias force toward the second end stop, and a controller operatively coupled to the motor. The controller may store a predetermined zero position that corresponds to the position of the HVAC component that results when the HVAC component is allowed to come to rest against the second end stop under the influence of the bias force of the return spring while the motor is interrupted from controlling the position and speed of the HVAC component. The controller may be configured to remove drive power to the motor before the HVAC component 14 reaches the predetermined zero position, allowing the return spring to gently park the HVAC component on the send end stop.

An adjustment device designed to adjust a flow rate of a fluid flowing in a duct, including a body in which an adjustment valve is mounted, movable in rotation about an adjustment axis, the body having an area upstream of the adjustment axis and a downstream area opposite to the upstream area with respect to the adjustment axis, where the adjustment axis is equipped with connecting means which cooperate with at least one first control member positioned in the downstream area and a second control member positioned in the upstream area.

Control damper including a body, defining a duct with an axis of blowing, and a control device, including a flap for closing the duct, the flap being movable in rotation with respect to the body about a pivot axis orthogonal to the axis of blowing, means for adjusting a nominal position of the flap, and a return device returning the flap to the nominal position when the flap is moved away from the nominal position. For an improved control, the means for adjusting further includes a shaft pivotally mounted with respect to the body about an axis of adjustment, wherein an angular position of the shaft about the axis of adjustment is adjustable, and at least one control cam limiting movements of the flap between the nominal position and an open position, wherein the return device includes a spring that is tensioned when the flap is in the nominal position.