A system and method for an air purification assembly that creates high volume, sterilized straight-line airflow with a significant reduction in electricity consumption utilizing counter rotation of two propellers mounted in reverse to create linear airflow and thrust that sucks in air through an inlet and blows the air out through an outlet. Air purification assembly may also sterilize the air as it passes through light utilizing a light core system with a ring-shaped assembly that has one or more UV-C LEDs that may kill bio-organisms within proximity to the air purification assembly while dissipating the heat created by the UVC LED lights in the light core system.

An air circulator includes a blower unit that is provided with an airflow opening on a front side of the blower unit. A grill is provided in the airflow opening, and is provided with airflow guide blades in a spiral manner. The air circulator also includes a controller that achieves a rhythm air in which weak wind and strong wind are switched over by controlling a rotational speed of a motor of the blower unit. The grill is provided with plural airflow guide blades in a spiral manner. Inner end portions of the airflow guide blades closer to the center of the spiral of the airflow guide blades are protruded from outer end portions if the airflow guide blades in an airflow direction.

A cleaner reduces noise. The cleaner includes a motor, a fan including a number Z of blades and rotatable at a rotational speed N, indicating revolutions per minute, about a rotation axis by the motor, a cover having an inlet located frontward from the fan, and a number V of ribs located in the inlet. The ribs extend in a radial direction from the rotation axis and are arranged in a circumferential direction about the rotation axis. The fan is rotatable to produce noise having a frequency f.sub.NZ of 20,000 Hz or higher, and f.sub.NZ=(m−k×V)×N/60 and m=n×Z+k×V, where n is an order, m is an integer, and k is an integer.

A centrifugal fan is disclosed and includes a lower case, an impeller and an upper case. The lower case includes a bottom plate and a sidewall. The impeller is disposed on the bottom plate. The upper case is assembled with the sidewall to form an outlet. The upper case is formed by stamping and includes a first plane, an inlet and a grille. When the impeller is rotated, an airflow flowing from the inlet to the outlet is formed. The grille is protruded outwardly from the first plane, and includes a connecting frame and plural ribs. A spacing height is formed between the connecting frame and the inlet. Each rib has a first end connected to the connecting frame and a second end connected to the first plane. A pair of notches are disposed adjacent to two opposite lateral edges of the second end of the corresponding rib, respectively.

A blower may include a base, a case provided above the base and having an air inlet and an air outlet, a fan provided inside the case, a rotating plate connected to the case and provided to be rotatable above the base, a motor to rotate the rotating plate, and a bearing provided between the rotating plate and the base, fixed to the rotating plate, and supported movably on the base.

A washing machine appliance includes a wash basket rotatably mounted within a wash tub for receiving of a load of articles for washing and a drive motor having a motor shaft for selectively rotating the wash basket and an agitation element. A cooling fan is mechanically coupled to the motor shaft for urging a flow of air as the drive motor rotates the motor shaft and a fan cover is positioned over the cooling fan. The fan cover includes an endcap positioned opposite the cooling fan relative to the drive motor along an axial direction, a peripheral portion defining a plurality of ventilation openings spaced apart along a circumferential direction, and a plurality of louvers positioned over the plurality of ventilation openings for directing the flow of air away from the drive motor.

A handheld fan with a fairing has a fan head and a handle. The fan head is cylindrical and is provided with an air inlet, an air outlet, and a fluid passage connecting the air inlet and the air outlet. Air inlet vanes and air outlet vanes are disposed in the air inlet and the air outlet respectively. The fan head comprises a front cover and a rear cover that are fixedly connected. A fairing is disposed on inner sides of the front cover and the rear cover. The impeller is hidden in the fan head, so users will not be cut by blades when the blades rotate; the fairing is disposed in the fan head and is provided with the air inlet vanes and the air outlet vanes, so that all components of the fan can be injection-molded and assembled easily.

An air circulator includes a blower unit that is provided with an airflow opening on a front side of the blower unit. A grill is provided in the airflow opening, and is provided with airflow guide blades in a spiral manner Each of the airflow guide blades is convex toward an airflow direction between its inner end portion and its outer end portion to form the grill three-dimensionally. The grill further includes a circular ring that intersects with the airflow guide blades.

A bladeless fan with multiple air ducts is disclosed. The bladeless fan has a fan housing, a control system arranged in the fan housing, a blower system connected with the control system, an intermediate air duct communicating with the blower system and a rotation component connected with the control system. The intermediate air duct is provided with a side air duct at its both sides, the rotation component is connected with the side air duct to drive the side air duct to fold and unfold with the intermediate air duct as a center shaft. The side air duct is driven by the rotation component to fold and unfold with the intermediate air duct as a center shaft. The fold and unfold of the side air duct can achieve different effects, satisfy the user's requirement and improve the user experience.

The present disclosure relates to a cooking hob comprising: a body configured to act as a support for the cooking activity and having an upper surface and a lower surface; at least one cooking zone located at the upper surface of the body; a suction opening formed on the upper surface; suction elements placed in fluid communication with the suction opening and configured to suck cooking fumes, said suction elements comprising a motor fan having a rotation axis which lies in a plane substantially parallel to the upper surface and extending between a first and an opposite second end along the rotation axis, the suction elements are configured to divide the cooking fumes into a first and a second portion of the cooking fumes directed respectively towards the first and the second end of the motor fan.