A blade adjustment mechanism and an air circulator. The air circulator includes a housing defining an air outlet, and the air outlet includes an air inlet side and an air outlet side. The blade adjustment mechanism includes: a fixing bracket, fixedly connected with the housing; at least two wind guide assemblies, spaced apart from each other and partially extending into the air outlet, rotationally connected with the fixing bracket; at least two first connecting rods, rotationally connected with the at least two wind guide assemblies located, extension lines of the at least two first connecting rods along length directions of the at least two first connecting rods being configured to intersect; and a second connecting rod, fixedly connected with an end of each of the at least two first connecting rod.

A rotary machine includes a rotor that includes an impeller cap that regulates the movement of an impeller fixed to a rotary shaft that extends in an axial direction about the axis; a housing that covers a rotor; and an inlet guide vane that has a plurality of movable blades that extend from the housing toward an inner side in a radial direction and disposed at intervals in a circumferential direction, in which a blade tip portion, which is a tip end of the movable blade in the radial direction, is disposed on the outer side in the radial direction with respect to an outer peripheral surface of the impeller cap, and the position of at least a part of the blade tip portion in the axial direction overlaps the position of the impeller cap in the axial direction.

A centrifugal compressor comprises: an impeller; an inlet pipe portion forming an intake passage to introduce air to the impeller; and a throttle mechanism capable of reducing a flow passage area of the intake passage upstream of the impeller. When PA is a throttle position where the throttle mechanism minimizes the flow passage area of the intake passage, PB is a tip position of a leading edge of a blade of the impeller, L is a distance between the throttle position PA and the tip position PB of the leading edge in an axial direction of the impeller, and D is a diameter of the impeller at the tip position PB of the leading edge, the distance L and the diameter D satisfy L/D≤0.2.

A mobile climate control assembly that includes a portable housing with a first fan blower-wheel assembly and a second fan blower assembly each respectively having a wheel blade member, partially surrounded by an air deflector wall, disposed within a housing cavity and operably configured to rotate 360° around an axis of rotation parallel and non-co-planar with respect to one another. The assembly also includes a fan motor operably coupled to the wheel blade members and an electronic controller electronically and communicatively coupled to the fan motor and operably configured to independently and selectively control rotation of the wheel member of each of the first and second fan blower-wheel assemblies to generate an ambient air velocity gradient along at least an approximate 90° angular traverse path from the front face and without rotation of the portable housing.

A centrifugal compressor for a chiller system includes a casing having an inlet portion and an outlet portion, a recirculation structure including a recirculation path and a recirculation discharge cavity, an impeller disposed downstream of the recirculation discharge cavity, a plurality of recirculation discharge guide vanes disposed to surround the recirculation discharge cavity, and a diffuser disposed in the outlet portion downstream of the impeller. The recirculation structure is configured to impart a swirl to a flow of refrigerant into the inlet portion. The recirculation path supplies the refrigerant from the diffuser to the recirculation discharge cavity. The recirculation path includes a recirculation pipe that introduces the refrigerant toward the plurality of recirculation discharge guide vanes. An annular groove is disposed between the recirculation pipe and the plurality of recirculation discharge guide vanes. An annular plate is disposed between the annular groove and the recirculation discharge cavity.

A cooling assembly includes an air mover and a vent panel coupled to the air mover. The vent panel includes an inlet. The cooling assembly includes a vane that is rotatable around a central vertical axis of the vane between an open position and a closed position to open and close the inlet.

A continuous variable trim compressor includes: a plurality of rotary vanes provided in a passage of air flowing toward a compressor wheel; and a rotating device configured to rotate the plurality of rotary vanes simultaneously, wherein as the plurality of rotary vanes is rotated simultaneously by the rotating device, a cross-sectional area of the passage of air flowing toward the compressor wheel is variable.

The invention relates to a motorized fan unit for a motor vehicle, comprising a motor (2), a fan (3) for moving an air flow (F) that is configured to be controlled by the motor (2), and a control module (4) for controlling said motor (2), the control module (4) comprising an electronic card, the motorized fan unit delimiting a main air-flow circulation duct (5) and a cooling duct (6) configured to cool said electronic card of the control module, the duct (6) comprising an inlet (7) provided with a deflector (8) for diverting a portion of the air flow into the duct (6), the deflector (8) being mounted movably according to an air flow rate in the main duct for the purpose of increasing an air flow rate in the cooling duct (6) with the speed of the air flow in the main duct (5).

A mixed flow fan module and a portable air purifier including a mixed flow fan module are provided. The mixed flow fan module may include a fan housing having an outer surface that is curved along a circumferential direction and defining an operation space, a fan rotatably disposed inside of the fan housing, and a fan base coupled to the fan housing and configured to guide air toward the fan.

A variable inlet guide vane apparatus for imparting a motion to a fluid flow entering into a compressor. The variable inlet guide vane apparatus includes a housing defining a fluid flow passageway. The housing includes a first and second housing portion, a ring gear, and a plurality of guide vanes. The guide vanes include a stem, a gear, and a vane. The stem is disposed between the first and second housing portions, the vane is arranged within the fluid flow passageway, and the gears are arranged exterior the housing.