Abstract: A cooling device includes a partitioning board abutting inner faces of two boards, respectively. A chamber is defined between the partitioning board and one of the two boards. Another chamber is defined between the partitioning board and another of the two boards and intercommunicates with the chamber via an intercommunication port and a backflow port of the partitioning board. A pump drives a working fluid to circulate in the two chambers. Two welding channels are formed on outer faces of the two boards and surround the two chambers, respectively. The smallest distance between a channel bottom face of each annular welding channel and the inner face of a respective board having the annular welding channel is smaller than that between the inner and outer faces of the respective board. The two boards are coupled to the partitioning board along the annular welding channels by laser welding.

Abstract: An immersion cooling system includes a sealed tank having a chamber. A circulating layer and a working layer are respectively formed by first and second working liquids filled in the chamber and are contiguous to each other. The boiling point of the second working liquid is higher than that of the first working liquid. The density of the second working liquid is lower than that of the first working liquid. The first and second working liquids do not dissolve in each other. A circulating cooling module includes a circulating pipeline having first and second ports located in the chamber. The circulating pipeline also has a heat absorbing section and a condensation section located between the first and second ports. The heat absorbing section is located in the working layer. The first working liquid flows into the circulating pipeline from the first port and circulates in the circulating pipeline.

Abstract: A cooling fan includes a fan frame and an impeller. The fan frame includes a substrate, a sidewall connected to the substrate, and a lid connected to the sidewall and opposite to the substrate. An air inlet is formed in the lid. The substrate, the sidewall, and the lid together define at least one air outlet. The impeller is rotatably mounted in the fan frame. A plurality of bulges protrudes from an inner face of the sidewall and/or an inner face of the lid.

Abstract: A slim pump according to the present invention includes a frame, a shaft-coupling portion, a stator, and an impeller. The frame includes an interior separated by a partitioning board into a first chamber and a second chamber. A flow inlet intercommunicates with the first chamber and a flow outlet intercommunicates with the second chamber. The first chamber is intercommunicated with the second chamber via a communication hole of the partitioning board. The shaft-coupling portion is located in the frame. The stator is disposed around the shaft-coupling portion and is located within an axial extent of the first chamber. The stator is axially aligned with the communication hole. The impeller includes a plurality of blades and an inlet opening located in the second chamber. The inlet opening faces and axially aligns with the communication hole.

Abstract: A motor including a support unit, a first rotating part, a second rotating part, a rotor and a stator is disclosed. The support unit includes an axle and a bearing coupled with the axle. The first rotating part is fit around the axle and is coupled with the bearing. The second rotating part is coupled with the first rotating part. The rotor is coupled with the second rotating part. The stator is connected to the support unit.

Abstract: A method for manufacturing a stator of a waterproof motor includes disposing a first assembly in a mold where the first assembly includes a coil unit wound around an iron core assembly, and filling the mold with a thermosetting plastic which forms a housing after curing. The housing houses the coil unit and the iron core assembly. A recess is formed at one end of the housing. The method further includes disposing a second assembly in the recess of the housing where the second assembly includes a circuit unit, and filling the recess of the housing with a waterproof glue which envelopes the circuit unit after curing. According to the above, the stator of the waterproof motor is formed.

Abstract: An impeller includes a hub, a plurality of blades provided around an outer periphery of the hub, and at least two connecting rings connected to the plurality of blades. Each of the plurality of blades has a top edge and a bottom edge opposite to the top edge. One or more of the at least two connecting rings is disposed between but not connected to the top edges and the bottom edges of the plurality of blades. A cooling fan including the impeller is also provided.

Abstract: A bearing system includes a first bearing, a second bearing, and a rotating member. The first bearing is hollow and has a first inner face. The second bearing is located in the first bearing. The second bearing includes a second inner face axially aligned with the first inner face. A partitioning space is formed between the first inner face and the second inner face. The rotating member has a shaft and a protruding portion coupled to the shaft. The protruding portion is located in the partitioning space. A dynamic pressure gap is formed between the protruding portion and the first inner face during rotation. Another dynamic pressure gap is formed between the protruding portion and the second inner face during rotation.

Abstract: A fan frame includes a housing, a shaft tube, a circuit board and a plurality of light-emitting elements. The housing includes a base and a plurality of connection members located between the base and a peripheral wall of the housing. The shaft tube is mounted on the base. The circuit board is mounted in the housing and includes a body having a through-hole. The circuit board is fit around the shaft tube via the through-hole and is integrally formed with a plurality of protruding ribs and at least one outer rib. Each protruding rib is aligned with a respective connection member. Each outer rib is located between two adjacent protruding ribs. The light-emitting elements are mounted on the protruding ribs and the outer rib. A fan including the fan frame is also disclosed.

Abstract: A ceiling fan includes a support unit, a stator, a rotor and a lamp. The support unit includes an axle and a magnetic disc fit around the axle. The stator is fit around the axle. The rotor has a plurality of blades rotatably mounted to the axle. The lamp includes a housing and a light emitting portion below a magnetic top face of the housing. The magnetic top face of the housing is attracted to the magnetic disc.

Abstract: An inner-rotor motor including a housing, a stator and a rotor avoids damage to the coil unit which often occurs during assembly of the conventional inner-rotor motor. The housing has an inner periphery provided with a plurality of protrusions. The iron core has an outer periphery provided with a plurality of notches. The insulating sleeve includes a plurality of positioning members. In radial directions perpendicular to the shaft, each of the plurality of notches is spaced from a center of a shaft at a minimal distance, and each of the plurality of positioning members is spaced from the center of the shaft at a maximal distance. The maximal distance is smaller than the minimal distance.

Abstract: A method for manufacturing a stator of a waterproof motor includes disposing a first assembly in a mold where the first assembly includes a coil unit wound around an iron core assembly and filling the mold with a thermosetting plastic which forms a housing after curing. The housing envelops the coil unit and the iron core assembly. A recess is formed at one end of the housing. The method further includes disposing a second assembly in the recess of the housing where the second assembly includes a circuit unit and filling the recess of the housing with a waterproof glue which envelops the circuit unit after curing. According to the above, the stator of the waterproof motor is formed.

Abstract: A rotor of an inner-rotor motor includes a shaft having a connecting portion. A permanent magnet is mounted around the connecting portion of the shaft. The permanent magnet includes at least one first engaging portion. At least one coupling member includes a through-hole. The shaft extends through the through-hole. The at least one coupling member includes a second engaging portion engaged with the at least one first engaging portion of the permanent magnet.

Abstract: A blade adapter includes a support portion and a plurality of blade connection sections. The plurality of blade connection sections is connected to an outer periphery of the support portion. Each of the plurality of blade connection sections has a first face and a blade connection face opposite to the first face. The blade connection face includes at least one inclined portion. A windward adjustment angle or an inclination adjustment angle is presented between the at least one inclined portion and a horizontal plane. In addition, a ceiling fan includes a motor, the blade adapter, and a plurality of blades. The support portion of the blade adapter is coupled with the motor. The plurality of blades is coupled with the blade connection faces of the plurality of blade connection sections, respectively.

Abstract: A fan includes a fan frame, an impeller, a plurality of blades and a light emitting unit. The impeller is rotatably coupled with the fan frame and includes a light diffuser ring. The plurality of blades is connected to the light diffuser ring. The light emitting unit is mounted in the fan frame, includes a board and plurality of light-emitting elements mounted on the board, and shines light on the light diffuser ring.

Abstract: A dustproof bearing assembly includes a base having a shaft tube. The shaft tube has an open end with an opening. At least one bearing is coupled to an inner periphery of the shaft tube. A rotating member includes a shaft seat. A shaft includes a first end coupled to the shaft seat and a second end extending through a shaft-receiving hole of the at least one bearing. A dustproof member includes a lower face and an upper face. The lower face is spaced from the open end of the shaft tube. The dustproof member covers the opening. The upper face of the dustproof member abuts a bottom of the shaft seat. The dustproof member has an outer diameter larger than an inner diameter of the shaft tube. The dustproof bearing assembly can be used in a motor.

Abstract: A motor includes a base, a stator, a dynamic pressure bearing unit and a rotor. The base includes a shaft tube. The shaft tube includes a closed end and an open end. The stator is mounted around the shaft tube. The dynamic pressure bearing unit includes a bearing, a dynamic pressure assembly and a thrust plate. The bearing is received in the shaft tube. The dynamic pressure assembly and the thrust plate are disposed in a position relatively adjacent to the open end of the shaft tube and relatively distant from the closed end of the shaft tube. The dynamic pressure assembly is located between the bearing and the thrust plate. A lubricating fluid layer is disposed between the dynamic pressure assembly and the thrust plate. The rotor is connected to the thrust plate and is rotatably coupled with the bearing.

Abstract: A ceiling fan includes an axle, a hub, a plurality of blades, a plurality of connecting members, and a plurality of protective sleeves. The hub is rotatably coupled with the axle. The plurality of blades is coupled with the hub. Each of the plurality of blades has a first end and a second end. The first end is coupled with the hub. Each of the plurality of blades has a channel intercommunicating the first end with the second end. The plurality of connecting members is respectively received in the channels of the plurality of blades. Each of the plurality of connecting members has an end coupled with the hub, as well as another end coupled with the second end of the each of the plurality of blades. The plurality of protective sleeves respectively envelopes the plurality of connecting members.

Abstract: A motor includes a seat, a bearing, a limiting member, a stator and a rotor. The seat includes a base plate and a shaft tube connected to the base plate. The shaft tube includes an open end distant to the base plate and having a plurality of fusion posts. The bearing is received in the shaft tube. The limiting member has a central hole. A diameter of the central hole is smaller than a diameter of the open end. The limiting member has a plurality of through-holes surrounding the central hole. The plurality of fusion posts respectively extends through the plurality of through-holes to fix the limiting member to the shaft tube by fusion bonding. The stator is fit around the shaft tube. The rotor includes a shaft extending through the central hole of the limiting member and rotatably coupled with the bearing.

Abstract: A handheld electronic device includes a case, an electronic unit and a cooling fan. The case includes at least one rib, an air inlet and a heat outlet. The at least one rib delimits a heat chamber. The air inlet and the heat outlet intercommunicate with an outside of the case. The electronic unit includes a heat source located in the heat chamber. The cooling fan is located in the heat chamber and includes an air entrance and an air exit. The air entrance intercommunicates with the air inlet of the case, and the air exit intercommunicates with the heat outlet of the case.