An EC motor contains a rotor, a stator, a shaft, a bearing system and an intermediate element connecting the stator to the shaft. The rotor includes a rotor case and one or more permanent magnets, and it is supported, by the bearing system, so as to be rotatable about the shaft. The stator is at least partially arranged, by means of the intermediate element, in a radially outer circumference of the bearing system. Ideally, a fan contains such an EC motor and a fan wheel connected to the rotor case of the rotor of the EC motor. Moreover, a household appliance contains an EC motor or a fan including the EC motor.

A cooling device includes a fan frame including a bottom plate and a base part disposed on the bottom plate, a stationary pillar coupled to the fan frame, and a fan assembly that is rotatably disposed about the stationary pillar. The fan assembly is supported on the stationary pillar by at least one bearing positioned between the fan assembly and the stationary pillar. The cooling device also includes a decorative plate coupled to the stationary pillar. The decorative plate has an identifying indicia that permits at least some light to pass therethrough. The cooling device further includes a light emitting assembly disposed on the fan frame and configured to emit light that is directed toward the identifying indicia.

A cooling device includes a fan frame including a bottom plate and a base part disposed on the bottom plate, a stationary pillar coupled to the fan frame, and a fan assembly that is rotatably disposed about the stationary pillar. The fan assembly is supported on the stationary pillar by at least one bearing positioned between the fan assembly and the stationary pillar. The cooling device also includes a decorative plate coupled to the stationary pillar. The decorative plate has an identifying indicia that permits at least some light to pass therethrough. The cooling device further includes a light emitting assembly disposed on the fan frame and configured to emit light that is directed toward the identifying indicia.

A ceiling fan comprising a motor system. The motor system is mounted around a motor shaft. The motor shaft couples to a downrod for suspending the ceiling fan from a structure. The motor shaft and motor are encased by a motor housing. The motor housing comprises hub arms for mounting a plurality of blade holders. The blade holders coupled to a plurality of blades rotatable about the motor during operation. The downrod comprises a wire disk mounting guy wiring to the downrod. A retention rod is utilized internal of the motor and downrod as a secondary retention method. An electrical connector is internal of the motor shaft and electrically couples to the stator to power the motor.

A heat dissipation device including frame, fan rotating assembly, stator assembly, decorative plate and at least two magnetic components. Frame includes base and barrel connected to base. Fan rotating assembly includes hub and a plurality of blades connected to hub. Fan rotating assembly is rotatably disposed on frame via first bearing fan rotating assembly. Stator assembly is disposed on barrel. Hub covers stator assembly. Decorative plate has decorative design and central pillar connected to decorative plate and extending from decorative plate. Central pillar is connected to hub via second bearing. At least two magnetic components are respectively disposed on decorative plate and stator assembly. One of the at least two magnetic components disposed on decorative plate and another one of the at least two magnetic components disposed on stator assembly are attracted to each other so that decorative plate is stationary while fan rotating assembly rotates.

A fan dynamic pressure structure having a plastic frame integrally formed around an oil-containing sintered metal powder bearing includes an oil-containing sintered metal powder bearing, a plastic frame having a middle tube integrally formed around a peripheral of a bushing body of the oil-containing sintered metal powder bearing, a blade assembly having an axial shaft penetrating through a shaft hole of the oil-containing sintered metal powder bearing, the axial shaft protruding downwardly and having an annular groove, and an annular dynamic pressure piece having an insertion hole and an annular body surrounding the insertion hole. The insertion hole is engaged with the annular groove of the fan assembly, the annular body has a plurality of curved radial dynamic pressure ditches on a surface adjacent to the oil-containing sintered metal powder bearing, of the annular body.

A fan includes a base, a motor and an impeller, and the motor includes a sleeve, a rotor, a position limiting element and a composite elastic element. The sleeve is disposed on the base, and the sleeve has a bottom portion and a side wall, which constitute an accommodation space. The rotor has a rotating shaft disposed within the accommodation space, and the rotating shaft has an outer wall. An annular groove is formed on the outer wall and has a surface. The position limiting element is disposed on the sleeve and extended from the side wall toward the rotating shaft, and the position limiting element has a bottom surface. The bottom surface faces toward the bottom portion, and the bottom surface is interfered with the surface, thereby eliminating the gap between the bottom surface and the surface. Therefore, noise of the up and down vibration is avoided from generating.

A gas dynamic bearing includes a shaft extending along a central axis extending vertically, and a sleeve with a hole opening at least at one end of the sleeve in an axial direction, at least a portion of the shaft housed inside the hole. The sleeve includes dynamic pressure grooves in an inner peripheral surface of the hole. The shaft includes a core portion, and a protective portion that is disposed on an outer peripheral surface of the core portion and that includes at least a portion facing the inner peripheral surface of the hole in a radial direction. The protective portion includes a first protective portion and a second protective portion. The first protective portion is at least above or below the second protective portion in the axial direction, and includes at least a portion with a thickness in the radial direction more than a thickness of the second protective portion in the radial direction.

A radial fan (1) is provided with a motor (2) and a fan housing, an outer part (4) and an inner part (5) that form a spiral-like pressure chamber (D). A pressure connector (33) which forms an outlet (44) of the radial fan (1) is arranged on the outer part. The fan housing is equipped with a fan wheel (3) which is arranged on a shaft (7) connected to the motor (2), wherein an annular flow divider (8) which surrounds the fan wheel (3) is arranged adjacently to the fan wheel (3) in a radial direction. The flow divider together with the fan housing forming a diffuser (9), which transitions directly into the pressure chamber (D), about the fan wheel (3).

A vapor pump for an automotive application includes a housing group with a pump housing having a pump chamber, an inlet opening and an outlet opening, and a motor housing having a motor chamber; a rotor shaft made from an electrically conductive material; a pumping wheel made of an electrically conductive plastic material arranged in the pump chamber and mounted on the rotor shaft to rotate therewith to pump the fuel vapor from the inlet opening to the outlet opening; a drive motor arranged in the motor chamber which includes a motor stator, a motor rotor and a motor control unit; a contact plug which electrically connects the motor control unit; and an electrically conductive bearing arrangement which is connected with the contact plug via a conductor. The motor rotor is connected with the rotor shaft to rotate therewith. The electrically conductive bearing arrangement rotatably supports the rotor shaft.