A compressor is provided. The compressor includes a first stage portion with a first impeller assembly and a first diffuser assembly, a second stage portion with a second impeller assembly and a second diffuser assembly, and an interstage portion situated between the first stage portion and the second stage portion. The interstage portion includes a directing vane assembly, a collector passage surrounding the directing vane assembly, and a circumferential insertion slot fluidly coupling the collector passage to the directing vane assembly.

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.

Centrifugal compressors can incorporate a side stream flow of intermediate pressure vapor between stages of that compressor. The side stream flow can be controlled by a side stream injection port controlled by a throttle ring disposed between stages of the compressor. The throttle ring can allow or obstruct flow through the side stream injection port. The throttle ring can extend and retract in a direction substantially perpendicular to the direction of flow from the first stage impeller to the second stage impeller. A method of operating a centrifugal compressor can include actuating a throttle ring by rotating a drive ring to adjust a flow of interstage fluid into the second stage impeller.

An improved parallel flow pump is provided. The improved parallel flow pump includes clearance for tooling, nuts, and bolts, and further provides smoothed, contoured surfaces and one or more turning vanes to improve the top-to-bottom velocity distribution in the discharge manifold into which the pump flows.

An impeller for a centrifugal compressor, the impeller rotatable about a central axis, has: an outer hub body including a first material and extending around the central axis, the outer hub body defining a gaspath face extending from an inlet to an outlet, the gaspath face extending radially away from the central axis from the inlet to the outlet; blades protruding from the gaspath face and circumferentially distributed around the central axis; and an inner hub body extending around the central axis, the inner hub body secured to the outer hub body, the outer hub body axially overlapping and extending around the inner hub body, the inner hub body made of a second material being more cold dwell resistant than the first material.

A thin cooling fan includes a fan shell, a motor, a plurality of blades, and a PCB. The fan shell comprises a base plate and a shell cover which cover to each other to form an inner space. The base plate has a first surface facing toward the inner space and a second surface having a receiving space and opposite to the first surface. The motor is combined in the inner space. The blades are disposed in the inner space and rotated by the motor. The PCB is disposed in the receiving space and flush with the second surface. Thus, the whole thickness of the cooling fan is reduced and the flow channel design in the inner space is not affected.

A compressor has a rotor assembly having an impeller for generating an airflow through the compressor, a stator core assembly for causing rotation of the impeller, and a diffuser assembly for acting on the airflow generated by the impeller. The diffuser assembly has a first diffuser stage and a second diffuser stage. The first and second diffuser stages are separate components connected to one another by a fastener.

A centrifugal fan assembly including fan wheel, a primary inlet bell, a secondary inlet bell, and a flow grid. The primary inlet bell and secondary inlet bell direct air into an inlet of the fan wheel of the centrifugal fan. Also disclosed is a sound reduction assembly for reducing the sound produced by a centrifugal fan or centrifugal compressor. A method of directing air flowing into a centrifugal fan or a centrifugal compressor is also disclosed.

Disclosed is a fan motor. The present disclosure provides a fan motor including a motor housing receiving a motor therein, a motor bracket disposed on the motor housing, an impeller coupled to a shaft of the motor, and a diffuser disposed between the motor and the impeller and having a vane body, an axial flow vane provided to an inner circumference of the vane body, and a diagonal flow vane provided above the axial flow vane.

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.