Apparatus and method for ventilating a building structure, such as a residence. In some embodiments, a ventilation system includes a damper assembly which extends through an interior substrate (e.g., an interior wall) of the structure and an exhaust assembly which extends through an exterior substrate (e.g., an exterior wall of the structure and which is in communication with the damper assembly via a control circuit. The interior wall separates a conditioned space and an unconditioned space. The exhaust assembly is initially activated to vent exhaust air from the unconditioned space while a door of the damper assembly remains closed. The door is subsequently opened responsive to a measured environmental parameter, such as a differential pressure between the conditioned and unconditioned spaces, to generate a combined airflow that passes from the conditioned space to the unconditioned space and then to the exterior of the structure.

A damper of a heating, ventilation, and/or air conditioning (HVAC) system includes a crank configured to rotate about an axis of a shaft relative to a support, a reset arm configured to rotate about the axis of the shaft relative to the support, a spring coupled to the crank and the reset arm, and a fuse link configured to be coupled to the reset arm and the support in a set configuration and to release the reset arm from the support in response to a temperature exceeding a threshold temperature. The crank and the reset arm are configured to rotate away from the support in a first circumferential direction toward a closed configuration in response to the fuse link releasing the reset arm from the support. A spring force of the spring is configured to increase to enable the reset arm to rotate in a second circumferential direction opposite to the first circumferential direction beyond the set configuration and into a reset configuration.

An air conditioner unit includes a blower fan. The blower fan includes a blade assembly and a motor connected to the blade assembly. The air conditioner unit also includes an inlet grille upstream of the blower fan and an outlet grille downstream of the blower fan. The air conditioner unit further includes an automatic louver assembly operatively connected to the outlet grille whereby air flowing through the outlet grille is directed in a first direction when the automatic louver assembly is in a first position and the air flowing through the outlet grille is directed in a second direction when the automatic louver assembly is in a second position.

An example an adjustable bracket and an damper system usable with the adjustable bracket assembly for transmitting an actuation force from an actuator to a plurality of damper assemblies. The adjustable bracket assembly may include a shaft extending along and configured to rotate about a first axis in response to an output from the actuator, a first output lever configured to transmit a rotational force of the shaft to a first damper assembly, and a second output lever configured to transmit the rotational force of the shaft to a second damper assembly.

An actuator in a HVAC system includes a mechanical transducer, an input connection configured to receive a power supply line voltage, and a voltage divider circuit. The voltage divider circuit includes a first capacitor in series between the input connection and the mechanical transducer, a second capacitor in parallel with the first capacitor between the input connection and the mechanical transducer, and a first transistor operable to connect and disconnect the first capacitor and/or the second capacitor from the voltage divider circuit based on the power supply line voltage, thereby adjusting a capacitance between the input connection and the mechanical transducer. The voltage divider circuit is configured to receive the power supply line voltage from the input connection, use at least one of the first capacitor or the second capacitor to reduce the power supply line voltage to a reduced voltage, and provide the reduced voltage to the mechanical transducer.

A first duct control apparatus is an apparatus that controls a motor that controls opening and closing of a duct opening and closing device provided in a duct for sending air from an air conditioner to a room, and includes: a power supply board that receives commercial power; a motor board that controls the motor based on the commercial power received by the power supply board; and a control board that controls the motor board based on the commercial power received by the power supply board. The motor board performs, for the motor, control of the opening and closing of the duct opening and closing device and control for adjusting a degree of opening of the duct opening and closing device. The power supply board, the motor board, and the control board are provided in a single unit.

The present embodiment may comprise: a housing that have a suction port, a space formed therein, and a discharge port formed in an upper portion thereof; a purification unit and a blowing unit accommodated in the space; a discharge guide that is disposed in an upper portion of the housing and discharges blown air to the discharge port; a tilting mechanism that is connected to the discharge guide to tilt the discharge guide; and a lifting and lowering mechanism that lifts and lowers the tilting mechanism.

Provided is an air conditioner including a housing including a discharge path, a first discharge wall forming the discharge path, and a second discharge wall arranged at a side opposite to the first discharge wall and an airflow controller including a guide member configured to move between a first location provided at an inside of the first discharge wall and a second location protruding outside of the first discharge wall. The air conditioner controls a discharge airflow while minimizing loss of discharge air volume through an airflow controller without using a general blade, and controls a discharge airflow of air discharged through a discharge path having a circular shape.

An air conditioner indoor unit includes a housing having an air inlet, a first air outlet, and a second air outlet arranged below the first air outlet, and an air output door assembly arranged at the second air outlet and connected to the housing. At least a portion of the air output door assembly is configured to move relative to the housing to form an air output channel between the at least a portion of the air output door assembly and the housing. The air output channel has a ring-shaped air output end located in front of the second air outlet. The air conditioner indoor unit further includes an opening-closing mechanism movably mounted at the air output door assembly and configured to open or close an air regulation channel area that includes an upper part of the air output channel.

A ceiling-type indoor unit of an air conditioner includes a case in which at least one discharge hole is formed; a first vane disposed at the at least one discharge hole; a vane motor coupled to the case and providing a drive force to the first vane; a drive link that is rotatably coupled to the case and coupled with the vane motor and transmits the drive force of the vane motor to the first vane; a first vane link rotatably coupled to the case and with the first vane; a support bracket coupled to the case and disposed at the at least one discharge hole; and a support link disposed between a first end and a second end in a longitudinal direction of the first vane, and rotatably coupled to the first vane and the support bracket.