A radiator fan module for a motor vehicle has a fan shroud with a fan impeller aperture and a motor support disposed within the fan impeller aperture, for an electric motor, and has a support-side housing part and has a plurality of struts that are connected to the fan shroud. A fan impeller is disposed in the fan impeller aperture and is driven in rotation about an axis of rotation. The fan impeller has a hub-side housing part and a plurality of radially outwardly directed radiator fan blades disposed on the hub-side housing part. The support-side housing part and the hub-side housing part have different diameters, wherein the support-side housing part or the hub-side housing part that has a greater diameter overlaps the other of the support-side housing part or the hub-side housing part, with an air gap being formed.

A transport refrigeration unit for use with a transport trailer includes a structural framework mountable to a wall of the transport trailer, a condenser heat exchanger unit mounted to the structural framework, an evaporator housing separated from the condenser heat exchanger by a distance, and at least one condenser fan assembly positioned aft of the condenser heat exchanger unit and forward of the evaporator housing. The at least one condenser fan assembly includes a fan casing and a fan rotor rotatable relative to the fan casing about an axis. The fan rotor has a plurality of fan blades. A shroud is coupled to a radially outer end of the plurality of fan blades. The shroud includes an axially oriented protrusion extending from a distal end of the shroud towards the fan casing and a clearance is formed between the protrusion and the casing defining a convoluted flow path.

A blower device includes a motor having an output shaft and a housing; a fan rotationally driven by the motor; and a shroud having a shroud body with a fan installation hole, and a motor mounting part for mounting the motor arranged inside the fan installation hole when viewed in an axial direction of the output shaft. The motor mounting part includes an inner cylinder surrounding a periphery of the motor from a radial outer side of the output shaft; an outer cylinder surrounding the inner cylinder from the radial outer side; and spokes connecting the inner and the outer cylinders. The inner cylinder includes a top wall covering the motor from above while the shroud is fixed. A back end edge of the top wall, which is located on a positive pressure side when the fan is rotated, is located closer to the positive pressure side than the housing.

A diagonal fan has an electric motor, a housing, and a diagonal impeller received in the housing. The diagonal fan is driven via the electric motor. The fan generates a diagonal flow during operation that is deflected in an axial flow direction by an inner wall of the housing. An outlet guide vane device is arranged adjacent to the diagonal impeller when viewed in the axial flow direction. The outlet guide vane device has a plurality of guide vanes that are distributed in a circumferential direction. The outlet guide vane device homogenizes an airflow generated by the diagonal impeller. The device has an air outlet with a specified outlet diameter B. The diagonal fan extends over a total axial length E. The ratio of the total axial length E to the outlet diameter B is configured such that 0.3≤E/B≤0.6.

A blade, an impeller and a fan are provided. A trailing edge (12) of the blade (1) is provided with at least one concave arc segment (15). At least one end point of the at least one concave arc segment (15) is located between a radial outer edge (13) of the blade (1) and a radial inner edge (14) of the blade (1). The blade (1) is provided with at least one ridge structure protruding from a pressure surface (18) of the blade (1) toward a suction surface (17) of the blade (1). The blade is provided with at least one concave arc segment at a trailing edge thereof on the basis of a bionics principle, and is further provided with a ridge structure, thus improving an airflow pattern at the trailing edge of the blade by means of changing a shape of the blade, and reducing noise accordingly.

The propeller (16) for a fan (14) of a motor vehicle thermal system (10) comprises a bowl (22) for receiving a motor (18) of the propeller (16) and at least one blade (34) connected to the receiving bowl (22), the receiving bowl (22) further comprising: a central member (26) comprising at least one through-orifice (30), a collar (28) extending around the central member (26), the blade (34) extending radially outwards from the collar (28), and at least one rib (36) arranged on a front face of the collar (28), with reference to a direction of flow of an air flow (F) generated by the propeller (16), extending radially outwards so as to have a curved shape oriented in the opposite direction to a direction of rotation of the propeller (16).

The invention discloses a motor (501) and a hair dryer having the same, the motor (501) comprises a rotor assembly (16) and a stator assembly (15), wherein the motor (501) also comprises a bracket (17) for supporting the rotor assembly (16) and the stator assembly (15), and the rotor assembly (16) is connected with a fan blade (502); the bracket (17) comprises a first cylinder (8) for supporting the rotor assembly (16) and a second cylinder (9) for protecting the fan blade (502); the first cylinder (8) is connected with the second cylinder (9), and at least a part of the first cylinder (8) is located outside the second cylinder (9). By integrating the fan blade (502) and the motor (501) as a component, the assembly steps of the whole machine are simplified and the difficulty of assembly is reduced. The user experience is good by using the hair dryer with the motor.

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.

Hydraulic pitch actuation mechanism includes vaned rotor within timing chamber surrounded by annular timing chamber wall within fan hub and variable area and volume retarding and advancing chambers within timing chamber. Timing pocket walls extend inwardly from timing chamber wall and interdigitated with timing vanes extending outwardly from vane shaft of vaned rotor. Hydraulic retarding and advancing fluid passages extend through fan drive shaft and through the fan hub to the retarding and advancing chambers respectively. Fluid passages include annular axially spaced apart retarding and advancing passage discharge sections, annular and axially spaced apart retarding and advancing passage entry sections spaced apart from and aft of retarding and advancing passage discharge sections respectively. Retarding and advancing connecting passage sections extend through fan drive shaft and fluidly connect retarding and advancing passage entry sections to retarding and advancing passage discharge sections. Hub passages through fan hub connect passage discharge sections to chambers.

An electric motor assembly includes an electric motor, a fan assembly coupled to the electric motor and configured to rotate therewith about an axis. The fan assembly includes a hub including a cylindrical portion having an inlet end and an outlet end, the hub further including an inlet surface coupled to the inlet end. The fan assembly also includes a plurality of blades coupled to an outer periphery of the cylindrical portion, wherein the inlet surface is tapered to direct an inlet airflow toward the plurality of blades.