Abstract: A cooling fan with dual blade sets has an impeller formed by a rotatable hub, a stator assembly, and a shell. A plurality of mini blades and a plurality of guide blades are respectively formed on a bottom surface and an external surface of the rotatable hub. The impeller has a plurality of holes defined on the bottom surface being arranged in a circle adjacent to the mini blades. Therefore when the impeller rotates, the mini blades are able to drive out the heat in an inner space between the impeller and the shell through the holes to outside.

Abstract: A balance adjusted fan mainly includes a hub, a shaft and a plurality of blades. The hub has a ring-wall and a top wall, and the shaft is connected to the top wall. The ring-wall has a plurality of socket holes that can be formed on the top edge, the bottom edge or the outside surface of the ring-wall. The blades are formed on the outside surface of the ring-wall. When the fan rotates in unbalance, at least a balance weight can be connected in one of the socket hole in an appropriate position that opposes to the heavier side of the hub to stabilize the rotation balance of the fan.

Abstract: A water-cool radiator module comes with a supporting part having a shell body; the shell body includes a fan and a water tank; the water tank is connected to a cold water pipe and a hot water pipe; an extended section of the cold water pipe and hot water pipe is connected to a cold waterhead; the shell body includes several radiating holes at one end; such that in an application, the supporting part is inserted into a slot on the computer case and the shell body is mounted onto the slot; the cold water in the cold waterhead of a heat-generating electronic component is circulated to the shell body through the hot water pipe; the fan blows air to radiate heat to the outside through the radiating holes; and the cooled fluid flows from the water tank to the cold waterhead through the cold water pipe.

Abstract: A heat radiator for a CPU is composed of a metal piece, a columned radiating piece and a fan. The metal piece has a top surface, a bottom surface, and a conical surface formed between the top surface and the bottom surface, wherein a diameter of the top surface is smaller than a diameter of the bottom surface. The columned radiating piece is provided outside the metal piece. The radiating piece has multiple fins radially and separately extending from a center of the columned radiating piece. A conical recess is defined at a bottom of the columned radiating piece for receiving the metal piece. The fan is mounted on a top of the columned radiating piece.

Abstract: A heat radiator includes a water tank containing cooling liquid. A first radiating member has a top plate secured at top edges of the water tank. Multiple first fins are formed beneath the top plate and immersed in the cooling liquid. A heat insulating pad is adhered on the top plate. At least one semiconductor refrigerating component is mounted on the top plate and has a hot surface abutting the top plate and a cold surface exposed from the heat insulating pad. A second radiating member is positioned on the first radiating member and has a bottom plate with an area over the semiconductor refrigerating component. Multiple second fins are formed on the bottom plate. A fan is mounted on the second fins of the second radiating member.

Abstract: A desk lamp with function of generating negative ions comprises a lamp body and a negative ion generator. The lamp body is consisted of a lamp base, a lamp arm and a lampshade. The negative ion generator is set on an internal wall inside the lamp body and has an air outlet plane toward a light region defined by the lampshade. The negative ion generator may be installed an appropriated position inside the lamp body, such as the lamp base, the lamp arm or the lampshade, so that negative ions from the negative ion generator will be exhausted outside the lamp body.

Abstract: A negative ions generating circuit design with decreasing high frequency noise includes a power indication circuit, an oscillation circuit, an amplifying circuit and a radial frequency filtering circuit. The power indicating circuit, the oscillation circuit and the amplifying circuit are used for generating negative ions. The radial frequency filtering circuit has a capacitance to be utilized for limiting the high frequency in a coil so that the high frequency will not be amplified by through the transistor of the oscillation circuit. The coil creates an inductance to limit the high frequency so as to effectively eliminate the high frequency created by the oscillation circuit.

Abstract: A coil housing for a stator in a brushless fan is adapted to reduce the effect of permanent magnets in the fan when power is secured to the fan. The coil housing with an upper and lower case. Each case has multiple radial L-shapes protrusions that hold the coil in position. Each protrusion has a foot perpendicular to the cases. Adjacent feet are separated by an actual distance and a virtual distance. Each foot has edges configured to minimize the virtual distance between adjacent feet so individual magnets in the ring of magnets in the fan do not act on a single foot.

Abstract: A mini fan mounting arrangement in which the stator has an annular locating flange at the center of the top insulation frame thereof, and the fan blade assembly has a plurality of springy hooks equiangularly spaced around the center shaft thereof and respectively hooked in the annular locating flange to secure the fan blade assembly to the stator for enabling the fan blade assembly to be rotated on the stator.

Abstract: A vortex fan blade unit has multiple arc protrusions disposed on the surface of the body of the fan blade unit for the airflow on its surface to be guided to where fan blades rotate by compromising contour of those arc protrusions thus to create vortex for increasing air volume delivered while reducing harmonic vibration of the fan blades for noise reduction.

Abstract: A stator coil for a radiator fan, the stator coil consists of at least two enamel wires co-axially wound together. Each of the enamel wires has opposite first and second ends extended out from the stator coil. The first and second ends of the at least two enamel wires optionally connected in different connection ways so that the stator coil is optionally formed as a uni-coil winding in parallel connection, a uni-coil winding in series connection or a multiple-coil winding to satisfy different requirements of the radiator.

Abstract: A fastener for a heat-radiator on a chip has a leg with a lower end and an upper end. A cone-shaped foot of which a maximum diameter is larger than that of the leg is formed at the lower end of the leg. A head is formed at an upper end of the leg. Two flexible bow arms are oppositely formed at two sides of the leg, each with a first end fixed on a bottom face of the head. A ring is formed on second ends of the bow arms. An opening is defined in the ring for the leg extending therethrough. A resilient member is provided outside the leg and extends through the opening.

Abstract: A cooling fan dust guard has provided on the inner side of fan blades multiples of fins at equal distance from one another around the spindle to create disturbance as the fan blades rotate to outwardly expel the airflow so to prevent the airflow carrying dust an easy ingression of the dust into the spindle and help cool down the stator assembly.

Abstract: A brushless motor having a control circuit with a heat detector has a rotor, a stator with two coils and a control circuit. The control circuit has a driver IC connected to the two coils, a Hall element connected to the driver IC, a heat detector connected to driver IC and an AC to DC converter connected to an AC power source. The AC to DC converter provides converted DC power to the driver IC, the coils and the Hall element to make them operate normally. Therefore, the motor can directly use the AC power source by the control circuit. The motor has a function for automatically adjusting rotational speed of the motor by the heat detector to decrease power consumption.

Abstract: A cooling fan dust structure has provided on the end of the fan blade hood a recess that mutually forms an overcut height difference with a flange protruding from the peripheral of a motor base so to prevent the airflow carrying dust an easy ingression and even keep off the flying dust from entering into the spindle as the fan blade unit rotates.

Abstract: A constant speed control circuit for a fan includes a timing control unit, a driving unit and a fan speed control (FSC) unit. The fan speed control unit receives an external frequency signal from a frequency generator, which represents an expected rotational speed of the fan. Based on the external frequency signal, the FSC unit generates an adjusting signal that is input to the timing control unit. After the timing control unit compares a Hall signal with the adjusting signal, driving signals are generated and provided to control the activation time of transistors of the driving unit. Thereby, the fan is operated at a constant speed status.

Abstract: A stator includes an integrated yoke with upper and lower insulators provided on upper and lower ends thereof and stator coils directly wound around the insulators and the yoke. Wherein the yoke has an outer annular member and an inner annular member integrally formed therewith. The upper and lower insulators respectively have two outer rings and two inner rings integrally formed therewith corresponding to the outer and inner annular members of the yoke. Whereby the structure of the stator is simple and manufacturing of the stator is efficient.

Abstract: A cooling fan is composed of a rotor and a stator received in the rotor. The rotor has a cylindrical housing with an outer periphery and a top surface. The cylindrical housing has a plurality of cutouts defined at the edge of the outer periphery and the top surface and inclined outwards and downwards from the center of the top surface. A plurality of blades is radially formed on the outer periphery of the cylindrical housing and respectively between adjacent cutouts.

Abstract: A voltage transformer for AC/DC comprising an IC having a rectifying unit with a function to transform AC of full waveform to continuous semi waveform, and a wave-filtering unit employing Gate transient voltage preset by Field Effect Transistor to proceed with filtering sample by ON and OFF method such that the preset voltage passes through the output terminal and achieves the effect of transformed voltage, and a voltage stabilizing unit which processes the output voltage for suitable utilization, wherein the sampling method of the AC with respect to Field Effect Transistor includes: (i) Fixed voltage sampling and (ii) Fixed time sampling method.

Abstract: A stator includes an integrated yoke with upper and lower insulators provided on upper and lower ends thereof and stator coils directly wound around the insulators and the yoke. Wherein the yoke has an outer annular member and an inner annular member integrally formed therewith. The upper and lower insulators respectively have two outer rings and two inner rings integrally formed therewith corresponding to the outer and inner annular members of the yoke. Whereby the structure of the stator is simple and manufacturing of the stator is efficient.