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).

A firestat for providing an output for controlling an opening and closing of a fire/smoke damper. The firestat includes a fire/smoke damper test switch and an actuator configured to depress the fire/smoke damper test switch. The firestat is further configured to release the fire/smoke damper test switch in response to a depressing force applied to the actuator, wherein melting or other damage to the actuator causes a release of the test switch.

A firestat for providing an output for controlling an opening and closing of a fire/smoke damper. The firestat includes a fire/smoke damper test switch and an actuator configured to depress the fire/smoke damper test switch. The firestat is further configured to release the fire/smoke damper test switch in response to a depressing force applied to the actuator, wherein melting or other damage to the actuator causes a release of the test switch.

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 door assembly for an air conditioner indoor unit includes a door mounting plate, a door, a guiding part, and a drive assembly. The door mounting plate includes a receiving groove and a guiding groove. The door is configured to be movable in a direction approaching and away from the door mounting plate. The guiding part is connected with the door, located at a side of the door facing the door mounting plate, and movably disposed in the guiding groove. The drive assembly is configured to drive the door to move, and is disposed in the receiving groove.

An air-conditioning system includes an air-conditioning unit for supplying conditioned aft to an activity space defined by a compartment and having an air-conditioning duct for guiding the conditioned aft to the activity space, and at least one auxiliary air duct mechanism including an auxiliary air duct communicatingly connected to the air-conditioning duct for communicating the activity space with the outside, and a fan mounted in the auxiliary air duct. The auxiliary air duct has an auxiliary air inlet for guiding therein the outside air, an inner air inlet opening for guiding therein the conditioned air, and an auxiliary air outlet for discharging the outside air and the conditioned air into the activity space.

An air-conditioning system includes an air-conditioning unit for supplying conditioned aft to an activity space defined by a compartment and having an air-conditioning duct for guiding the conditioned aft to the activity space, and at least one auxiliary air duct mechanism including an auxiliary air duct communicatingly connected to the air-conditioning duct for communicating the activity space with the outside, and a fan mounted in the auxiliary air duct. The auxiliary air duct has an auxiliary air inlet for guiding therein the outside air, an inner air inlet opening for guiding therein the conditioned air, and an auxiliary air outlet for discharging the outside air and the conditioned air into the activity space.

An air conditioner and a method for controlling an air conditioner are provided. The air conditioner may include a case that forms a space therein with an open lower side; a panel that is disposed at lower side of the case, and has an inlet and a plurality of outlets disposed around the inlet; a fan that is disposed in the case; a plurality of wind adjuster that is disposed in each of the plurality of outlets, and adjusts a direction of air flowing through each of the plurality of outlets; a camera that obtains an image of an indoor space; and a controller that controls the plurality of wind adjusters based on image information obtained from the camera. The controller may divide the plurality of outlets into a first area outlet and a second area outlet, and adjust each of the plurality of wind adjusters so that airflows of air discharged through the first area outlet and airflows of air discharged through the second area outlet are formed differently.

An air conditioner is provided. The air conditioner includes a heat exchange module, at least one humidity sensor, and a controller. The heat exchange module includes a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and an absorbent disposed on an outer surface of the first and second heat exchangers. The controller is configured to control to stop a normal operation and perform a drying operation for supplying air to any one of the first and second heat exchangers serving as an evaporator when it is determined that a predetermined drying operation condition is satisfied based on humidity information of air passed through the any one of the first and second heat exchangers serving as the evaporator, during the normal operation in which the any one of the first and second heat exchangers serves as an evaporator and the other serves as a condenser.

An air conditioner is provided. The air conditioner includes a heat exchange module, at least one humidity sensor, and a controller. The heat exchange module includes a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and an absorbent disposed on an outer surface of the first and second heat exchangers. The controller is configured to control to stop a normal operation and perform a drying operation for supplying air to any one of the first and second heat exchangers serving as an evaporator when it is determined that a predetermined drying operation condition is satisfied based on humidity information of air passed through the any one of the first and second heat exchangers serving as the evaporator, during the normal operation in which the any one of the first and second heat exchangers serves as an evaporator and the other serves as a condenser.