A fan assembly including a base arranged to support the fan assembly on a surface, an air flow generator that is arranged to generate an air flow, and an air outlet that is arranged to emit at least a portion of the air flow from the fan assembly is provided. The air outlet is arranged to be oscillated relative to the base. The fan assembly further includes a controller that is arranged to control the oscillation of the air outlet relative to the base. The controller is arranged to vary an oscillation speed of the air outlet for each oscillation.

A blower includes a lower case provided with an inlet; a first tower that extends upward from the lower case and is formed with a first outlet; a second tower that extends upward from the lower case and is provided with a second outlet; a fan that is rotatably disposed on the lower case; a first air flow converter that is disposed at the first tower; and a second air flow converter that is disposed at the second tower, each of the first air flow converter and the second air flow converter including: a guide board that is disposed inside the first tower or the second tower or protrudes through a first wall or a second wall; an upper gear that rotates in engagement with an upper portion of the guide board; a lower gear that rotates in engagement with a lower portion of the guide board; a shaft that is connected to each of the upper gear and the lower gear to rotate together; and a motor that is connected to one of the upper gear and the lower gear to provide a driving force.

A blower includes: a fan; a lower body having an inner space to receive the fan, and a suction hole; a first upper body communicating with the inner space and having a surface with a first discharge hole; a first damper movably coupled to the first upper body and penetrating the surface; the first damper having a first end facing an outside of the first upper body and a second end opposite to the first end; and a first bar extending along and coupled to the second end of the first damper.

A blower in one aspect of the present disclosure includes: a housing including a first discharge port; a motor in the housing; a fan in the housing; an attachment fitting portion; and a motor drive circuit. The attachment fitting portion is configured to detachably attach, to the first discharge port, an attachment including a second discharge port. The motor drive circuit (i) delivers a designated power to the motor and (ii) performs a constant power control that maintains a magnitude of an electric power delivered to the motor at a magnitude of the designated power.

A blower in one aspect of the present disclosure includes: a housing including a suction port and a discharge port; a motor in the housing; a fan in the housing; a motor drive circuit; and a control circuit. The control circuit detects an insufficient airflow from the suction port to the discharge port based on an operation parameter. The operation parameter is associated with an operation of the motor.

A rotating device includes a housing; a variable guide vane module provided on a surface of the housing; and a housing cover covering the variable guide vane module. The variable guide vane module includes a first module, which comprises a vane case that has a cylinder shape and that is provided in the housing, and further comprises a first link that is provided on the vane case; and a second module, which comprises a shroud case that is seated between the housing and the vane case, and further comprises a second link that is provided in the shroud case and is configured to be driven in accordance with driving of the first link. The variable guide vane module is configured to be separable into at least two modules, including the first module and the second module.

A blower is provided that may include a fan that creates airflow; a lower body forming an inner space in which the fan may be installed, and having at least one suction hole through which air passes; an upper body positioned above the lower body and including a first upper body forming a first inner space that communicates with the inner space of the lower body, and a second upper body forming a second inner space that communicates with the inner space of the lower body and spaced apart from the first upper body; a space formed between the first upper body and the second upper body and opened in a frontward-rearward direction; a first opening formed through a first boundary surface of the first upper body facing the space; a second opening formed through a second boundary surface of the second upper body facing the space; and a door assembly including a first door installed at the first upper body and that opens and closes the first opening, and a second door installed at the second upper body and that opens and closes the second opening.

A support module for a fan, which includes a motor and a fan impeller driven in rotation by the motor, in an embodiment for a radial or diagonal fan, for fastening the fan impeller between a nozzle plate on the inflow side and a base plate lying opposite the nozzle plate at a distance, wherein the motor is non-rotatably mounted with the fan impeller on or in the base plate and is held on the nozzle plate by means of struts extending between the base plate and the nozzle plate characterized in that the struts are adjusted to the flow exiting the fan impeller with a compact design. A fan is provided with a corresponding support module.

An AHU includes air channels. The air channel includes an air inlet and outlet guiding supply air into a building from outside or extract air from a building to the outside. The AHU is connected to an air ventilation ducting system. The AHU further includes a fan inducing a flow in the system when connected thereto. The fan provides a radial flow or mixed flow. The flow from the fan is redirected from radial flow to axial flow on its way from the inlet to the outlet. To provide a more efficient flow when the air flow from the fan changes direction, the fan includes a stator ring. The stator ring has an inner circumference encircling the fan's back plate and a surface essentially levelled with the surface at the edge of the back plate. The AHU may also include a flow guiding body guiding the air further downstream.

An outlet tube includes a first rib, a second rib, and a channel positioned between the first rib and the second rib. The first rib extends from a surface of the tube. The first rib tapers between a first thickness and a second thickness. The second rib extends from the surface of the tube. The second rib tapers between the first thickness and the second thickness. The channel has a first width between adjacent first thicknesses and a second width between adjacent second thicknesses. The first width is greater than the second width.