A fan with a housing defining an interior and a flow path therein and a valve assembly including a valve element disposed in the flow path and configured to rotate between an opened position and a closed position, wherein the valve element closes the flow path and a linkage assembly and a method of operating.

A blower includes a first extension having a first discharge port formed in a first wall, a second extension having a second discharge port formed in a second wall facing and spaced apart from the first wall, a fan provided below the first and second extensions to guide air toward each of the first tower and the second tower, a first gate provided inside the first tower or protruding from the first wall, a second gate provided inside the second tower or protruding from the second wall, a first guide motor to change a position of the first gate, and a second guide motor to change a position of the second gate.

A personal fanning assembly for cooling a user includes a shell that defines an interior space. The shell has a back that is open. A panel is coupled to the shell and defines a recess and a chamber in the interior space. The recess is configured to insert an electronic device of a user. Each of a plurality of holes that is positioned in the shell and the panel is configured to align with a respective functional element of the electronic device. A blower, which is coupled to the shell and positioned in the chamber, is configured to force air through an orifice that is positioned in a front of the shell onto the user. A plurality of slats extends between opposing edges of the orifice. The slats are positioned to shield the blower and are configured to direct the air that is forced through the orifice.

A fan with a housing defining an interior and a flow path therein and a valve assembly including a valve element disposed in the flow path and configured to rotate between an opened position and a closed position, wherein the valve element closes the flow path and a linkage assembly and a method of operating.

A backflow blocking apparatus for axial fans may be provided. The apparatus may comprise a sheet. The sheet may comprise a first section and a second section. The first section may comprise a plurality of flaps cut out of and retained by the first section of the sheet. The second section may comprise a guard structure. The apparatus may further comprise a fold about which the first section and the second section are folded on one another. The guard structure may inhibit the movement of the plurality of flaps in a direction toward the guard structure when the first section and the second section are folded on one another.

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 diffuser arranged at the downstream side of a blower, the diffuser including a conical diffuser shroud with a back draft damping butterfly valve arranged in the diffuser opening, and where the butterfly valve includes two doors both being attached to the diffuser shroud via a hinge arrangement adapted for allowing each of the two doors to rotate between a closed and an open position about the hinge axes extending between opposite sides of the diffuser shroud and where the doors are shaped so that they together substantially close the diffuser opening when they are in their closed position, and wherein each hinge axis intersects the diffuser shroud at a position closer to the upstream side at one side than on the opposite side of the diffuser shroud.

A cooling system for providing streamlined airflow is provided. The system includes a fan assembly that includes an inlet side and an outlet side. The fan assembly also includes an inlet fan guard connector located at the inlet side of the fan assembly and an outlet fan guard connector located at the outlet side of the fan assembly. The fan assembly also includes a lever housings located between the inlet fan guard connector and the outlet fan guard connector and a slots oriented between the lever housings and the inlet fan guard connector and the outlet fan guard connector, the plurality of slots configured to secure an additional modular component.

A blower includes a first extension having a first discharge port formed in a first wall, a second extension having a second discharge port formed in a second wall facing and spaced apart from the first wall, a fan provided below the first and second extensions to guide air toward each of the first tower and the second tower, a first gate provided inside the first tower or protruding from the first wall, a second gate provided inside the second tower or protruding from the second wall, a first guide motor to change a position of the first gate, and a second guide motor to change a position of the second gate.

A blower assembly for advancing the flow of air in an air flow device at a selected one of a plurality of air flow rates is provided. The blower assembly includes a blower housing defining a body thereof and a wall of the blower housing moveably secured to the body, a blower wheel rotatably mounted to the blower housing and a motor for rotating the blower wheel at a selected one of a plurality of rotational speeds. The blower assembly further includes a motion device secured to the body and to the wall. The motion device moves the wall relative to the body to a selected one of a plurality of distinct wall positions. The motor rotates the blower wheel at a selected one of a plurality of rotational speeds. A controller calculates optimum wall position and rotational speed to provide for minimal energy usage rate.