An axial fan for use with a wall ring plate includes a housing having an inlet region and a rotor. The rotor has an increased rotor diameter compared to a standardised rotor diameter. On the inlet side, the inlet region has a tapered section that narrows in an arched manner in a cross-sectional view from an inlet diameter to a wall ring diameter. The axial width and radial length of the tapered section are formed in a predetermined ratio.

A fan impeller includes a hub, a shaft, a metal housing, a magnetic ring and a plurality of blades. The outer periphery of the hub has a curved surface. The shaft is disposed in the hub and connected to the hub. The metal housing has an annular shape and is disposed in the hub. The magnetic ring is disposed at the inner side of the metal housing. The blades are disposed around the outer periphery of the hub.

An industrial ceiling fan structure utilizes a coupling structure between the fan blades and the motor main unit and the design of a pressing member attached to the mounting segment of the root of each fan blade to enhance the fan blade mounting strength. Furthermore, the ceiling fan motor provides an outer race and an inner race to secure the permanent magnets without an adhesive, thereby preventing the permanent magnets from loosening and improving the service life of the ceiling fan motor. In addition, through the heat dissipation structure of the outer casing of the motor main unit and the structure of the lamp, the heat dissipation of both the lamp and the motor main unit of the ceiling fan can be achieved.

A ceiling fan assembly including a non-rotating motor shaft with an upper and lower bearing stop, a stator mounted to the non-rotating motor shaft, a rotor surrounding the stator, a motor housing having an upper bearing seat spaced above the upper bearing stop and a lower bearing seat spaced below the lower bearing stop, an upper bearing seated within the upper bearing seat, a lower bearing seated within the lower bearing seat, and a downrod coupling provided on the non-rotating shaft. When the ceiling fan assembly is suspended from a structure with the downrod coupling, the weight of the rotor presses the upper bearing against the upper bearing stop such that the weight of the rotor is transferred through the upper bearing to the non-rotating shaft.

A destratification fan assembly of an industrial environment includes a support frame fixable to the ceiling of the industrial environment, a blade group rotatable about a main axis (X-X) and an electric motor group supporting the blade group and supported by the support frame. The electric motor group includes a drive shaft having a blade end to which the blade group is solidly connected, an electric motor operatively connected to the drive shaft to guide it in rotation, and an electronic command device of the electric motor for commanding the electric motor. In some embodiments, the electric motor includes a rotor and a stator, wherein the rotor is of the external rotor type.

A fan includes a frame, an impeller and a motor. The frame includes a base, a frame housing and a plurality of static blades. The frame housing includes an outlet. The static blades are disposed around the outer periphery of the base and connect between the base and the frame housing. A distance is provided between the outlet and the ends of the static blades located adjacent to the outlet, and the static blades are not protruding from the outlet. The impeller includes a hub and a plurality of rotor blades. The hub has a curved surface. The slopes of the straight lines connecting any two points on the curved surface are not equal. The rotor blades are disposed around the outer periphery of the hub. The motor is disposed on the base, and connects with and drives the impeller to rotate.

A fan impeller includes a hub, a shaft, a metal housing and a plurality of blades. The outer periphery of the hub has a curved surface. The shaft is disposed in the hub and connected to the hub. The metal housing has an annular shape and is disposed in the hub. A magnetic ring is disposed at the inner side of the metal housing. The blades are disposed around the outer periphery of the hub. The blades are projected along an extension direction toward the shaft to define projection areas thereof, and the projection area of a top and a bottom of any one of the blades is partially overlapped with other two adjacent blades. A distance between an outer edge of each blade and a rotational axis of the fan decreases proximate the top of the blade and then increases towards the bottom of the blade.

A ceiling fan assembly having a motor assembly with a rotating blade hub, and at least one fan blade mounted to the rotating blade hub with a blade span defined between a tip and a root, and defining an airfoil cross section including a rounded leading edge and a v-shaped trailing edge defining a chord therebetween. The blade comprising a pressure side surface and a suction side surface extending between the leading and trailing edges and including a hollow interior and including a tip opening at the tip and a root opening at the root for accessing the hollow interior. The at least one fan blade includes a thickness to chord ratio of less than about 15%.

A ceiling fan including a retention system and method of redundantly retaining a ceiling fan can include a ceiling fan motor assembly including a hollow motor shaft at least partially surrounded by a motor housing. A retainer plate is provided at the bottom of the motor housing including an opening. A retainer rod extends through the opening in the retainer plate and secures to the retainer plate. A support cable couples to the retainer rod to suspend the retainer plate from a structure, wherein the retainer plate is configured to redundantly retainer the ceiling fan.

A ceiling fan assembly having a motor assembly with a rotating blade hub, and at least one fan blade mounted to the rotating blade hub with a blade span defined between a tip and a root, and defining an airfoil cross section including a rounded leading edge and a v-shaped trailing edge defining a chord therebetween. The blade comprising a pressure side surface and a suction side surface extending between the leading and trailing edges and including a hollow interior and including a tip opening at the tip and a root opening at the root for accessing the hollow interior. The at least one fan blade includes a thickness to chord ratio of less than about 15%.