A HVAC system for a motor vehicle having a housing, wherein the housing has an air inlet for admitting air and a cold air path in which cold air flows is provided in the housing and a warm air path in which warm air flows is provided in the housing, wherein the warm air path and the cold air path open into a mixing chamber, wherein a mixing flap is provided for controlling the proportion of cold air flowing into the mixing chamber and the proportion of warm air flowing into the mixing chamber, wherein the mixing flap is arranged rotatable about an axis and is driven by a flap actuator which has a drive shaft, wherein a gear with a nonlinear translation characteristic is provided between the mixing flap and the drive shaft.

An actuator system which may incorporate a motor, a motor controller connected to the motor, a processor connected to the motor controller, and a switch connected to the processor for engaging the motor to open and close an actuator shaft. The switch may have a position which is a test mode. Selecting the position of test mode may cause the motor to move the actuator shaft to a certain position to verify operation of the actuator shaft. The actuator shaft may stay in the certain position while the switch is in a position of test mode. The system may also incorporate a spring attached to the actuator shaft. If power fails to the motor, then the actuator spring or another mechanism may return the actuator shaft to a fail safe position. The test mode may alternatively be selected at a controller via the communications bus to the processor.

The present disclosure relates to an air ventilator for an automobile, comprising: a housing (100) comprising a flow path (110) through which air is blown; a wind direction control unit (200) comprising a louver (210) to adjust a wind direction of the air; a function carrier (300) installed in the wind direction control unit (200); a shaft (400) comprising a coupling portion (410) formed on first side portion of the shaft (400), wherein the function carrier (300) is mounted on the coupling portion (410) such that the function carrier (300) is rotatable, and an output bevel gear (420) formed on a second side portion of the shaft (400); and a pair of dampers (500) coupled to a hinge (600) so as to be foldable, wherein each of the pair of dampers (500) comprises an input bevel gear (510) to be engaged with the output bevel gear (420).

A method for driving an actuator of an HVAC system having a region of mechanical play is provided, and which comprises the steps of: a] monitoring a position of a movable member of the HVAC system or at least one rotatable element of the actuator to determine when the region of mechanical play has been entered or exited; and b] ramping a drive power to the actuator between a zero-velocity drive power and a steady-state-velocity drive power during the region of mechanical play. The HVAC system implementing the above method is not only capable of reducing the noise produced by an HVAC system, but is also capable of reducing an over-powering of the actuator when there is a low load on the system.

The present disclosure provides a power transmission device in which stress is reduced and a vehicle air-conditioning device. An air-conditioning device has an inside/outside air door. A power transmission device drives the inside/outside air door. The power transmission device has a motor, a gear train, and a cam mechanism. A first gear of the gear train provides a rotatable member. A plurality of lock mechanisms is provided, which stops a rotation of the first gear at one end and/or the other end in a rotation direction of the first gear. The plurality of lock mechanisms provide a plurality of contacts between the first gear and a stationary link cover.

A vehicle air conditioning device comprises an instrument panel, a door that includes an overlapping portion where part of the door overlaps with the instrument panel in a closed state of the door, and a door blower outlet that opens toward a vehicle cabin interior, a first opening that is open toward the door, a second opening that is open toward the instrument panel, an air conditioning unit body, a first duct that that has a length direction end portion connected to the first opening, a second duct that has a length direction end portion connected to the door blower outlet, and a fin member respectively provided at the first opening and the second opening.

An air vent control system comprises a directional air flow component mounted on a first axis within a first housing, and a second housing defining an inner space in which the first housing is mounted. A first motor moves the directional air flow component to an angular position within the first housing, and a second motor pivots the first housing contained within the second housing. A front and rear opening allows air flow in a direction from the rear opening to the front opening. A controller sets the angular position of the directional air flow component on the first axis, and the angular position of the first housing on the second axis. The respective positions of the directional air flow component relative to the first housing and the first housing relative to the second housing selectively regulate the direction of airflow discharged.

An air-handling system for a heating, ventilation, and air conditioning system comprising includes a main housing, a temperature door, a mode door, and a control mechanism. The temperature door is disposed in a mixing and conditioning section of the main housing to control a temperature of a flow of air to a delivery section of the main housing. The mode door is disposed in the delivery section of the main housing to control a flow of air through an upper conduit and a lower conduit. The control mechanism cooperates with each of the temperature door and the mode door. The control mechanism includes a single actuator configured to independently control each of the temperature door and the mode door to provide independent temperature control for each of a high mode, a low mode, and a mixed mode of operation.

A heating, ventilation, and air conditioning (HVAC) system including a plurality of airflow control doors. A plurality of door gears are in cooperation with the plurality of airflow control doors such that rotation of each one of the plurality of door gears actuates a different one of the plurality of airflow control doors to control airflow through the HVAC system. A selector gear is moveable to individually rotate each one of the plurality of door gears to selectively actuate different ones of the plurality of airflow control doors. A power gear rotates the selector gear.

An air mixing damper arrangement having a first cooled air damper damping cooled air in a cooled air flow path and a second heated air damper damping heated air in a heated air flow path, wherein the first damper has a first shaft having a first center of rotation and the second damper has a second shaft having a second center of rotation, wherein the first center of rotation and the second center of rotation are substantially identically aligned. The first damper and the second damper are individually rotatable about their respective center of rotation, wherein the first damper and the second damper are both actuated by a cam plate, the first damper has a lever having a pin having a top level shape and a bottom level shape, the second damper has a lever having a first pin and a second pin.