A fan for a climate control outdoor unit includes a plurality of airfoils located around a central hub. Each of the airfoils includes a leading edge and a trailing edge opposite the leading edge. A pressure side surface extends between the leading edge and the trailing edge. A suction side surface is opposite the pressure side surface and extends between the leading edge and the trailing edge. The leading edge includes a greatest negative deviation from a radial line of greater than 10% of a span of the airfoil. The greatest negative deviation is located at between 45% and 85% of the span of the airfoil.

A portable cooling apparatus comprises a fan unit and a holder. The fan unit comprises a housing, a fan, a plurality of intake openings, and a plurality of outflow openings. The housing comprising a first housing surface. The fan is located within the housing and is adapted to circulate air. The intake openings are located on the first housing surface, with the intake openings adapted to allow air to enter into the housing for circulation by the fan. The outflow openings located on the housing, with the outflow openings adapted to allow air to exit from the housing. The holder comprises a backing, one or more walls, and a protrusion. The backing comprises a first backing surface. The walls extend from the backing. The protrusion is located on the first backing surface. The fan unit is adapted to engage within the holder, and when so engaged, the first housing surface is spaced apart from the backing by the protrusion.

A method for inflating an inflatable member includes providing an inflatable member including an outer surface defining an interior cavity, a housing defining a first vent in fluid communication with the interior cavity, a first one-way valve configured to open or close the first vent, a main pump having a main pump inlet and a main pump outlet, a valve control assembly for selectively opening or closing the one-way valve, providing an air pressure control assembly for sensing air pressure of the interior cavity, generating a first air pressure signal when the air pressure reaches a first threshold air pressure and generating a second air pressure signal when the air pressure reaches a second threshold air pressure, and providing a control device in electrical communication with the main pump, valve control assembly and air pressure control assembly.

A method for inflating an inflatable member includes providing an inflatable member including an outer surface defining an interior cavity, a housing defining a first vent in fluid communication with the interior cavity, a first one-way valve configured to open or close the first vent, a main pump having a main pump inlet and a main pump outlet, a valve control assembly for selectively opening or closing the one-way valve, providing an air pressure control assembly for sensing air pressure of the interior cavity, generating a first air pressure signal when the air pressure reaches a first threshold air pressure and generating a second air pressure signal when the air pressure reaches a second threshold air pressure, and providing a control device in electrical communication with the main pump, valve control assembly and air pressure control assembly.

An air circulator which is attached to a sheet member and which is for generating an air flow from one side of the sheet member to another side of the sheet member includes a fan main body and a ring member for attaching the fan main body to the sheet member. The fan main body includes a hollow cylinder unit, a flange formed on the cylinder unit, a motor fixing unit, a motor fixated to the motor fixing unit, a wing attached to a rotating shaft of the motor and first engaging units formed on outer surfaces of first parts of the cylinder unit, the first parts forming a pair and facing each other. The ring member includes second engaging units which are formed on inner surfaces of second parts that form a pair, the second parts facing each other, and which engage with the first engaging units.

An air circulator which is attached to a sheet member and which is for generating an air flow from one side of the sheet member to another side of the sheet member includes a fan main body and a ring member for attaching the fan main body to the sheet member. The fan main body includes a hollow cylinder unit, a flange formed on the cylinder unit, a motor fixing unit, a motor fixated to the motor fixing unit, a wing attached to a rotating shaft of the motor and first engaging units formed on outer surfaces of first parts of the cylinder unit, the first parts forming a pair and facing each other. The ring member includes second engaging units which are formed on inner surfaces of second parts that form a pair, the second parts facing each other, and which engage with the first engaging units.

A ventilation assembly includes a main housing comprising a first housing wall and a second housing wall, a fan assembly disposed within the main housing, the fan assembly including a fan, and an acoustic device disposed between said first and second housing walls, the acoustic device having a first distal portion, a second distal portion and an intermediate portion extending between the first distal portion and the second distal portion, the first distal portion being relatively wider than the intermediate portion.

A ventilation assembly includes a main housing comprising a first housing wall and a second housing wall, a fan assembly disposed within the main housing, the fan assembly including a fan, and an acoustic device disposed between said first and second housing walls, the acoustic device having a first distal portion, a second distal portion and an intermediate portion extending between the first distal portion and the second distal portion, the first distal portion being relatively wider than the intermediate portion.

The invention concerns an impeller (1a, 1b, 1c, 1d, 1e, 1f) of a motor vehicle fan comprising: a cylindrical ring (2) having a center (P), blades (3) extending from the cylindrical ring (2) and toward the center (P), each blade (3) having two radially opposite ends (4, 5), referred to as the blade root end (4) and the blade tip end (5), the blade root end (4) being directed toward the center (P) and the blade tip end (5) being secured to the cylindrical ring (2), characterized in that all the blade root ends (4) are free or linked together by a central hub (20) of reduced diameter.

A temperature destratification assembly can include an outer housing. An impeller can be positioned within the outer housing between the inlet and outlet of the outer housing. The impeller can have an impeller hub and a plurality of impeller blades extending radially outward from the impeller hub. The assembly can include an impeller motor configured to rotate the impeller blades about an axis of rotation. A stator can be positioned within the outer housing between the impeller and the outlet of the outer housing. The stator can include a plurality of vanes. The stator vanes can include an upstream edge at the upstream end of the stator, a first surface extending from the upstream edge to the downstream edge of the vane, and a second surface opposite the first surface and extending from the upstream edge to the downstream edge of vane. A plurality of the vanes can have a downstream edge at the outlet of the outer housing.