An information handling system may include a processor, a memory, and a power source operatively coupled in a base chassis; a blower system including a shaft operatively coupled to a blower motor; a hub operatively coupled to the shaft; an outer centrifugal blower blade set forming a monolithic piece with an inner axial blower blade set and hub, the inner axial blower blade set to increase the redirection of an incoming airflow via an inlet in a blower housing to the outer centrifugal blower blade set and air outlet in the blower housing, the outlet airflow direction in a plane of rotation of the blower system.

A part or an assembly of parts of a splitter stage of a turbofan, including a plurality of obstacles including at least one a blade and at least one arm, and a platform from which the obstacles extend, wherein the arm is defined by a skeleton angle having a trailing value on the trailing edge of between 3° and 15°.

An efficient axial fan includes an upper camber with a linear angle upper surface that expands from the leading edge of upper camber to the top of the surface and decreases from this peak to the trailing edge of upper camber, a lower camber with the parabolic curve vertex surface and the reverse parabolic curve vertex surface and the pointed lower surface as a result of a sudden curve towards the trailing edge of lover camber of the surface, a tip end connecting the ends of the wings to prevent eddies to form at the ends, a roof end connecting the bottom of the wings, at least one middle beam positioned between the lower camber and the upper camber associated with the tip end and the roof end, and a mean camber fixed on the middle beam located 90 degrees perpendicularly between the lower camber and the upper camber.

An impeller includes a hub, an outer ring, a plurality of first blades and a plurality of second blades. The plurality of first blades are arranged around the hub at intervals. Each of the plurality of first blades passes through the outer ring, extends inward from the outer ring, and is connected to the hub. The plurality of second blades are arranged around the hub at intervals. Each of the plurality of second blades passes through the outer ring. At least one of the plurality of second blades is disposed between the plurality of first blades. A length of each of the plurality of second blades is between 10% and 45% of a length of each of the plurality of first blades.

Sound is reduced after securing sufficient air volume. An intake side fan including a first housing, a first drive motor that functions as a drive source, a first hub that is rotated by drive force of the first drive motor, and a plurality of first impellers that is rotated along with the first hub; and an exhaust side fan including a second housing, a second drive motor that functions as a drive source, a second hub that is rotated by drive force of the second drive motor, and a plurality of second impellers that is rotated along with the second hub are provided. An axial maximum chord length of the first impellers is smaller than an axial maximum chord length of the second impellers.

A fan unit in which a structure of a fan and a driving source thereof is improved to realize stable and high-efficient fan driving, thereby obtaining a high suction force in a stick type electric cleaner. The fan unit installed in a stick type electric cleaner includes a first fan and a second fan disposed in a line on the same rotation axis and a driving motor configured to drive the first fan and the second fan. The second fan is configured to be rotated in a direction opposite of a direction in which the first fan is rotated.

A centrifugal fan includes an impeller with a base expanded radially, vanes arranged circumferentially, extending from a radially inner side to a radially outer side, and ends thereof at one axial side being connected to the base, and a ring portion connecting ends of the vanes at the other axial side. The vanes include first vanes and second vanes, when viewed axially, the lengths of the second vanes are larger than the lengths of the first vanes, the first vanes and the second vanes are circumferentially arranged alternatingly. Gaps are provided between radially outer ends of the first vanes and the second vanes that are circumferentially adjacent to each other, and sizes of circumferentially adjacent ones of the gaps are different from each other.

A rotor for a gas turbine is disclosed which includes alternating first and second set of rotor blades, the first set of rotor blades having a baseline profile and the second set of rotor blades having a profile with a cutback relative to the baseline profile, the cutback defining a removed portion of the baseline profile surrounding a maximum deflection point of a selected natural vibration mode. The cutback may be a leading edge cutback at a span position located a distance away from the hub between 20% and 50% of the total span length. The selected natural vibration mode may be a natural vibration mode higher than the 1st natural vibration mode, more specifically may be the 5t″ natural vibration mode.

Sound is reduced after securing sufficient air volume. An intake side fan including a first housing, a first drive motor that functions as a drive source, a first hub that is rotated by drive force of the first drive motor, and a plurality of first impellers that is rotated along with the first hub; and an exhaust side fan including a second housing, a second drive motor that functions as a drive source, a second hub that is rotated by drive force of the second drive motor, and a plurality of second impellers that is rotated along with the second hub are provided. An axial maximum chord length of the first impellers is smaller than an axial maximum chord length of the second impellers.

A pressurized cooling fan and instructions for use, which is designed specifically to solve poor cooling effect due to poor effect of pressurizing of existing similar products and the technical issues of inconvenience of production, and high production cost. The fan frame of this cooling fan is provided with inner blades, a motor assembly is provided in the guard of inner blades. Airflow enters into the fan frame through the gap between outer blades and inner blades, and is guided out through the hollow hole in the rear of the fan frame, the top plane of inner blades is lower than the frame plane of the fan frame; outer blades and inner blades are integrally connected and relatively rotate when the motor assembly rotates, the air passes through the rear part of the fan frame that is guided by the gap between the fan frame, outer blades and inner blades.