Abstract: Cooling apparatuses, electronic device assemblies, and cooling assemblies having a magnetic shape memory member are disclosed. In one embodiment, a cooling apparatus includes a first compliant member, a magnetic shape memory member, a magnetic field generating device, a second compliant member and a fan member. A first end of the magnetic shape memory member is coupled to the first compliant member. The magnetic field generating device is positioned proximate the magnetic shape memory member, and generates a magnetic field toward the magnetic shape memory member to cause the magnetic shape memory member to expand along a linear translation axis. Expansion of the magnetic shape memory member causes an actuated portion of the second compliant member to translate about an axis. The fan member is coupled to the actuated portion of the compliant member such that translation of the actuated portion translates the fan member.

Abstract: A cooling fan includes a housing and a motor. The housing includes a support portion, a cover portion and a lateral wall portion. The lateral wall portion is disposed between the cover portion and the support portion, and the lateral wall portion, support portion and the cover portion define a compartment, with the lateral wall portion having at least one lateral air inlet and at least one lateral air outlet penetrating through the lateral wall portion and communicating with the compartment. The motor is mounted inside the compartment of the housing and contains a stator and a impeller, with the impeller rotatably mounting to the stator. The motor further contains a hub with a top and a plurality of blades, with the top facing the cover portion, with the top and the cover portion delimiting a lateral flow path in the compartment, and with each blade being contained in the lateral flow path.

Abstract: A fan system includes a motor, a rotatable hub, and a plurality of fan blades. The motor is coupled with the hub by a hollow drive shaft, such that the drive system of the fan system is gearless. The motor is controlled by a PFC-based control module, which is in communication with sensors that are configured to sense parameters associated with operation of the fan system. The control module is configured to react in certain ways to certain conditions detected by the sensors, such that the fan system uses feedback-based control algorithms. A remote control panel is in communication with the control module. The remote control panel is operable to display fault conditions detected by the sensors. Blade retainers prevent fan blades from falling when a fan blade breaks free from the hub. Pins prevent the hub from falling when the hub breaks free from the rotor.

Abstract: The invention is a magnetically driven pump with a floating impeller and driven magnet, and the invention includes an impeller surface having geometric figures acting as the pumping bodies.

Abstract: One embodiment includes an impeller (10) for use with a fluid pump assembly (12) such as a secondary air pump assembly of an automotive exhaust breathing system. The impeller has numerous vanes (50) and ribs (52). Among other things, the ribs help optimize manufacture of the impeller.

Abstract: The present invention relates to an electric water pump having improved performance and durability. The electric water pump may include a stator generating a magnetic field according to a control signal, a rotor rotated by the magnetic field, a pump cover having an inlet and an outlet, a body having a front surface forming a volute chamber, a stator chamber, and a rotor chamber, the stator mounted in the stator chamber and the rotor mounted in the rotor chamber, a shaft having a central axis, fixed to the rotor and mounted in the rotor chamber, and an impeller fixed to the shaft so as to rotate together with the shaft, pressurizing the coolant having flowed in through the inlet, and mounted in the volute chamber, wherein the rotor chamber is fluidly connected to the volute chamber, and the stator chamber is fluidly closed and sealed from the rotor chamber.

Abstract: A cooling fan having motor and an impeller. The cooling fan may comprise a three-phase DC motor. The impeller may comprise a hub to house the three-phase DC motor and a plurality of blades extending from the hub. Each blade may have a height that is at least 25 % of the impeller diameter.

Abstract: Disclosed is a fan module used in electronic equipment and the like. The fan module of the present invention includes a dust-collecting part which has an air’-suction port and an air-discharge port, and which has a rotational region forming a passage linking the air-suction port to the air-discharge port and has a dust-collection box for collecting dust and detritus rotating in the rotational region; and a fan which is joined to one side of the dust-collecting part and makes air flow into the rotational region. The present invention can use centrifugal force to effectively remove various forms of dust and detritus contained in the air which flows into the casings of electronic equipment, household appliances and the like due to the action of a fan. Further, since a filter is not used, there is the advantage that the cooling efficiency is not reduced by the dust collection as the smooth flow of the air being sucked in is not disturbed.

Abstract: A micro cooling fan comprises a housing and a main circuit board. The housing has an accommodation space, a first inner surface, and a gap. The gap is in communication with the accommodation space, and two opposite side edges of the gap have a groove respectively. The main circuit board comprises a first circuit board and a second circuit board. The first circuit board has a stator, the second circuit board has a driving circuit, and the stator is electrically connected to the driving circuit. The first circuit board is disposed on the first inner surface, and the second circuit board is embedded into the grooves and blocks the gap.

Abstract: An electric machine comprising a stator having a stator winding, a housing accommodating the stator, a rotor, and an air gap having a generally cylindrical configuration. A plurality of circumferentially distributed, radial, first cooling gas ducts are provided in a stator core. Jets of cooling gas are directed to regions of an end winding which are relatively distant from the stator core, in order to achieve impingement cooling thereof. Flows of cooling gas are directed to portions of the end winding which are between the impingement cooled regions of the end winding and the respective front face of the stator core.

Abstract: A flywheel for a pump, and in particular a flywheel having a number of high density segments for use in a nuclear reactor coolant pump. The flywheel includes an inner member and an outer member. A number of high density segments are provided between the inner and outer members. The high density segments may be formed from a tungsten based alloy. A preselected gap is provided between each of the number of high density segments. The gap accommodates thermal expansion of each of the number of segments and resists the hoop stress effect/keystoning of the segments.

Abstract: An electric pump has a stator, a rotor, a pump volute, and an endshield. The pump volute and the endshield are formed together as a single monolithic part, thereby minimizing the axial length of the electric pump. A drainage passageway is provided on the endshield to harmlessly drain away any fluid that seeps past the pump's seals. In one embodiment of the invention, the drainage passageway is a groove that faces the stator and is configured to facilitate the evaporation of and leak fluid by channeling the fluid near the stator, which warms the fluid and thereby increases the fluid's evaporation rate.

Abstract: An electric water pump apparatus may include a body, a stator disposed in the body, a rotor in the stator, a pump cover having an inlet and an outlet, wherein a front surface of the body and the pump cover form a volute chamber, wherein a stator chamber is formed at an outer portion in the body in a radial direction and the stator is mounted in the stator chamber, and wherein a rotor chamber is formed at an inner portion in the body and the rotor is mounted in the rotor chamber, a shaft rotatably coupled to the front surface and fixed into the rotor, and an impeller fixed to a front portion of the shaft, wherein the shaft includes a first shaft connecting the impeller and a front end portion of the rotor and a second shaft connected to a rear end portion of the rotor along the central axis of the shaft.

Abstract: A fan motor includes a static body, a rotating body that has a shaft, a hub encircling a first end of the shaft and joined with the first end, and a blade joined around an outer periphery of the hub, a sleeve that retains thereinside a portion of the shaft at a second end side, a rotating flange which encircles the sleeve and which rotates together with the hub, a static flange which is disposed in an area at a side of the first end of the shaft, and which is joined with the static body so as to overlap the rotating flange in a radial direction, a dynamic pressure generating groove provided in either one of surfaces of the static body and the rotating body facing with each other in the axial direction, and a lubricant present between the static body and the rotating body.

Abstract: A fan structure comprises a stator module and a fan frame, the stator module comprises a fixing plate, an insulating holder, and a stator core. The fixing plate has a first surface, an opposite second surface and at least one fixing portion formed on the second surface and having a first engaging portion. The insulating holder has a first side facing the second surface of the fixing plate, an opposite second side and at least one catching member formed on the first side and having a second engaging portion. The stator core is coupled to the insulating holder. The fan frame has a base, the base is located between the fixing plate and the insulating holder, wherein the first engaging portion of the fixing member is engaged with the second engaging portion of the catching member.

Abstract: An air mixing unit suitable for buildings having open spaces. In one embodiment, the air mixing unit may include a centrifugal fan and mounting frame. The fan includes a rotatable body, a drive shaft defining a vertical rotational axis, a plurality of radial blades, a top air inlet, and a bottom air inlet. The fan is operable to draw air through the air inlet openings from axially opposing directions in some embodiments, mix the air, and discharge the mixed air laterally outwards from the fan to the open space. In some embodiments, the air mixing unit may be mounted near the ceiling of the building to temper cooler air drawn from outside with warmer inside room air before discharging the air into the space. A method for mixing and destratifying air within a building is also described.

Abstract: A multiple stage variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the multiple stage blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.

Abstract: Provided is an automotive water pump in which regions of a rotor chamber and a driver chamber are formed and a stator and a connector are implemented into an integral pump body by an insert molding method, to thus enhance a waterproof performance of the water pump and enhance an assembly through simplification of an assembly structure. The automotive water pump includes: a pump body in which a stator and a connector are molded in an integral structure, and a partial structure of an upper-end rotor chamber and a lower-end driver chamber is independently formed; a rotating assembly that is accommodated and combined in the rotor chamber, and that pressurizes and discharges a coolant that flows in from the outside by rotation of an impeller that is combined on top of a rotating axis according to rotation of the rotating axis to which a rotor facing the stator is fixed; and a driver cover that covers the driver chamber combined with a driver including the connector.

Abstract: An electric fan includes a fan shaft driven by a fan motor supported by a motor support. An oscillating device includes a rotational shaft connected to the motor support for driving the motor support to oscillate. A transmission gear has an axle connected to the rotational shaft and a gear wheel mounted around the axle and driven by a synchronous motor. An oscillating angle limiting switch detects a rotational angle of the rotational shaft and the gear wheel and sends a signal indicative of the rotational angle. A circuit board has a processor coupled to the oscillating angle limiting switch and receives the signal. A comparing program compares the rotational angle indicated by the signal with a selected one of a plurality of preset rotational angles. The synchronous motor is driven when the rotational angle indicated by the signal is equal to the selected preset rotational angle.

Abstract: A washer pump apparatus having a washer fluid heating function, may include a housing having an inlet provided at a first end thereof to permit a washer fluid to flow thereinto, and an outlet provided at a second end thereof to permit the washer fluid to flow out therefrom, a heater unit disposed in the housing on a course extending from the inlet substantially to the outlet to heat the washer fluid passing through the heater unit, and having a hollow portion therein, a path member inserted into the hollow portion, and having on an inner circumference thereof a passage through which the washer fluid passes, an impeller unit provided in the housing and supplying the washer fluid from the inlet to the outlet, a check valve provided at a portion of the outlet, and being open when a discharge pressure of the washer fluid is a preset value or more, and a control unit selectively operating the impeller unit and the heater unit.

Abstract: An advection fan includes a housing having a metal housing base and a closure member. A lateral wall is arranged between the metal housing base and the closure member and includes an air inlet and an air outlet. A horizontal air passage is defined between the metal housing base and the closure member. The metal housing base includes an engagement section. A stator includes a coil unit embedded in or abutting and attached to the engagement section of the metal housing base. The coil unit abuts the engagement face of the metal housing base. The coil unit includes a substrate and at least one coil formed on a surface of the substrate by printing circuit or electroforming process. An impeller is rotatably coupled to the shaft tube of the stator. A gap is formed between the impeller and the coil unit of the stator.

Abstract: An adapter, containing at least an inlet portion, an outlet portion, and a transition portion. The inlet portion, the outlet portion and the transition portion are integrally formed, and the transition portion bends upwards whereby staggering the inlet portion and the outlet portion. The adapter is easy to assemble and disassemble, which makes it easy to connect the blower to an external equipment. Moreover, the adapter is integrally formed, features simple structure and is convenient to cast, all of which reduces time for production and mold opening, and thus decreases production cost.

Abstract: The present invention provides micro-fluidic systems, a method for the manufacturing of such a micro-fluidic system and a method for controlling or manipulating a fluid flow through micro-channels of a such a micro-fluidic system. Herefore, an inner side of a wall of a microchannel is provided with actuator elements which can change shape and orientation as a response to an external stimulus. Through this change of shape and orientation the flow of a fluid through a microchannel may be controlled and manipulated.

Abstract: In an electric pump, a vortex chamber may be formed by a clearance between an outer circumferential surface of an impeller and an inner circumferential surface of a casing. A low rigidity part may be provided to a supporting portion or a shaft, or to both of them. The low rigidity part may be formed such that while the electric pump operates, a center point of the shaft in a top view of the shaft moves along a specific line which is parallel to a tangent line of the outer circumferential surface of the impeller at the specific position and passes through the center point of the shaft while the electric pump does not operate, or moves to one of two areas divided by the specific line. The one of the two areas may he opposite to the other of the two areas that includes the specific position.

Abstract: A motor structure of an intake manifold may include a compressor interlocking with a shaft and mounted on the intake manifold, a first pulley and a belt provided at an end of the shaft, and an electric motor having a motor shaft that may be coupled to a second pulley that may be engaged with the first pulley via the belt, wherein the motor shaft of the electric motor may be selectively coupled to a flywheel that may be additionally provided to pass through the pulley and the belt.

Abstract: The invention relates to a fan module (1), in particular for air conditioners in vehicles, comprising an electric motor (12) and a fan rotor (20), wherein the electric motor (12) and the fan rotor (20) are arranged on a rotor shaft (11) and are connected to each other by means of a drive connection (22, 30), and wherein the electric motor (12) is designed to drive the fan rotor (20) via a drive connection (22, 30), wherein the drive connection (22, 30) has a positive connection (22, 30) to a driver (30) and a mating driver piece (22, 24), wherein the driver (30) on the electric motor (12) and the mating driver piece (22) on the fan rotor (20) are arranged spaced apart radially with respect to the rotor shaft (11), wherein the driver (30; 40) is formed and designed in the direction of rotation of the fan rotor (20) to actuate the mating driver piece (22) in order to transmit a force from the electric motor (12) to the fan rotor (20).

Abstract: A centrifugal pump has a pump unit and a drive unit. The pump unit includes a volute and an impeller disposed in the volute. The drive unit has a stator and a rotor having a shaft. The volute includes an inlet, an outlet and a chamber in communication with the inlet and outlet. The inlet is coaxial with the chamber. The shaft of the rotor extends into the chamber of the volute and the impeller is attached to and driven by the shaft. The volute further includes a baffle installed in the inlet. The baffle includes a guide plate angled to the axis of the inlet.

Abstract: A control circuit is electrically connected to at least one fan device. The fan device has a motor and generates a sensing signal. The control circuit receives a power-source signal and the sensing signal and includes a power converting unit, a control unit and a switch unit. The power converting unit receives the power-source signal and thus respectively outputs a first power-source signal and a second power-source signal according to the power-source signal. The control unit receives the first power-source signal and the sensing signal and thus generates a control signal according to the sensing signal. The switch unit receives the control signal and generates at least one switch signal according to the control signal. The fan device receives the second power-source signal and the switch signal and drives the motor according to the switch signal.

Abstract: A hand-held electric fan includes a housing, an air inlet configured on one side of the housing, an air outlet configured on another side of the housing, fan blades configured in said housing, a motor for driving rotation of the fan blades, wherein the air inlet and air outlet have an included angle of 20˜160 degrees. The hand-held electric fan according to the present invention can be held by a user conveniently, such that the inflow and outflow of air are not interfered by the user's hand holding the fan during use.

Abstract: A fan includes an airflow guiding structure, an impeller and a guiding ring. The outer radius of the airflow guiding structure increases gradually from the top of the airflow guiding structure to the bottom of the airflow guiding structure. The airflow guiding structure includes a plurality of fins and a first space for accommodating a circuit device. The impeller is disposed on the airflow guiding structure and has a hub and several blades. The guiding ring connects to the airflow guiding structure via at least one connecting element. A predetermined distance is arranged between the inner surface of the guiding ring and the outer edges of the blades. An inlet is formed at the top of the guiding ring, and an outlet is formed between the bottom of the guiding ring and the outer surface of a sidewall of the airflow guiding structure.

Abstract: A fluid processing device for processing a multiphase fluid stream including a mixture of at least a gas and a liquid is disclosed. The fluid processing device may include at least one separator configured to separate the fluid stream into a liquid portion and a gaseous portion and deposit the liquid portion into a liquid reservoir. The gaseous portion may be directed to a compressor configured to pressurize and discharge a pressurized gas into a fluid discharge line. A portion of the pressurized gas may be further pressurized and directed to at least one ejector pump fluidly coupled to the liquid reservoir and configured to draw in liquid and discharge pressurized liquid into the fluid discharge line.

Abstract: A fan includes an airflow guiding structure, an impeller and a guiding ring. The outer radius of the airflow guiding structure increases gradually from the top to the bottom of the airflow guiding structure. The airflow guiding structure includes a plurality of fins and a first space for accommodating a circuit device. The impeller is disposed on the airflow guiding structure and the impeller has a hub and several axial-flow blades disposed around the hub. The guiding ring is connected with the axial-flow blades. An inlet is formed on the top of the guiding ring, and an outlet is formed between the bottom of the guiding ring and the outer surface of the sidewall of the airflow guiding structure. When the impeller rotates, the airflow enters the fan from the inlet and flows along the outer surface of the sidewall of the airflow guiding structure, then the airflow exits the fan through the outlet.

Abstract: An impeller 22 includes a rotating shaft 7 supported rotatably by an upper bearing 9 and a lower bearing 20 at upper and lower ends, a plurality of vanes 6, an arm 18 coupling an inner circumferential side of the vanes to the rotating shaft, an annular coupling portion 8 coupled to an outer circumferential side of each vane, and a driven magnet portion 12 placed in a lower portion of the annular coupling portion. A drive magnet portion 16 provided at a rotor 13 and a driven magnet portion 12 are opposed to each other with a bottom wall of the housing interposed therebetween, and rotation of the rotor is transmitted to the impeller through magnetic coupling. A blockade member 23 is placed below the vanes and blocks a space in a region spreading between the rotating shaft and the annular coupling portion while leaving an opening 14 at least around the rotating shaft.

Abstract: A combined canned motor-pump operates directly in the process fluid without the need for shaft seals or buffer or lubricating fluids. The pump incorporates an integral gas-separating system that includes gas separating hydraulics and a flow path that returns the gas to the main gas/oil separator. The gas-separating system includes a pump inlet for accepting incoming multiphase flow, at least one blade rotatable about the axis of rotation, an open annulus region for separating gas from liquid in the multiphase flow, at least one radial hole in the shaft for directing separated gas to the axial hole, and a pump outlet for discharging liquid from the pump.

Abstract: A method of harnessing geothermal energy to produce electricity by lowering a geothermal generator deep into a pre-drilled well bore below the Earth's surface. The Self Contained In-Ground Geothermal Generator (SCI-GGG) includes a boiler, a turbine compartment, an electricity generator, a condenser and produces electricity down at the heat sources and transports it up to the ground surface by cable. The Self Contained Heat Exchanger (SCHE) is integral part of (SCI-GGG) system and can function independently. It consists of a closed loop system with two heat exchangers. No pollution is emitted during production process. There is no need for hydro-thermal reservoirs although not limited to hot rocks. It can be implemented in many different applications. The SCHE also includes an in-line water pump operatively coupled to the closed loop system and can be used in many different applications.

Abstract: A stator device includes a base having a shaft tube receiving a bearing. The shaft tube includes a top end having at least one groove. A stator unit is mounted around an outer periphery of the shaft tube. The stator unit includes at least one limiting member extending through the at least one groove into the shaft tube. The at least one limiting member prevents the bearing from disengaging from the shaft tube, enhancing assembling convenience. The stator can be coupled with a rotor to form a motor with enhanced assembling convenience and enhanced rotational stability. The base can be interconnected by connecting members to a housing having air inlet and outlet sides. Vanes can be formed on the hub of the rotor to form an impeller. Thus, a heat-dissipating fan can be formed from the stator device.

Abstract: A handheld electric blower for stimulating and accelerating a fire includes: a hollow, generally cylindrical shaped body having a tapered, open front tip and an open rear end; a turbine blade positioned within the body; an electric motor positioned within the body and operationally coupled to the turbine blade; an adjustable baffle positioned within the front tip of the body; and a baffle control provided on an external surface of the body to adjust the position of the baffle to decrease or increase the flow of air through the body. Activation of the electric motor causes the turbine blade to rotate, thereby drawing air into the open rear end of the body and directing the air out of the tip.

Abstract: A centrifugal fan includes a housing including a base, a side wall portion having an air outlet defined therein, and a cover arranged above the side wall portion and having an air inlet defined therein. A circuit board is arranged on an upper surface of the base, and includes a circuit board protruding portion arranged to protrude radially outward of the housing. At least one of electronic components to be mounted on the circuit board is arranged radially outward from an inner circumferential surface of the side wall portion.

Abstract: A centrifugal discharge pump (1) for electric household appliances, of unusual efficiency, having: a working chamber which has an intake opening and a delivery opening; an open impeller (10) arranged inside the working chamber and rotatable about a main axis (x) and a motor (5) designed to drive the impeller (10) by means of a transmission shaft (6). The impeller (10) has a planar support element (11) integral with the transmission shaft (6), and a plurality of blades (12) projecting from the support element (11); a free space (13) is provided between the blades (12) in order to allow the removal of foreign solids present in the discharge stream.

Abstract: A turbocharger includes a turbine wheel, a compressor wheel connected thereto, an electric motor situated on the side of the compressor wheel which is distant to the turbine wheel, and a rotor connected to the compressor wheel in a rotationally fixed manner and designed in a freely projecting manner. A drive system for motor vehicles includes a turbocharger. The turbocharger is characterized by a very spontaneous response behavior, as well as the possibility for energy recovery.

Abstract: A miniature fan arrangement has a fan (10) including an electronically commutated drive motor (21), a first circuit board (52) associated with said motor, and a fan housing (30). The fan also has a mounting part arranged radially outside the fan housing (30), and has a membrane (32), made of an elastic material, that elastically connects the fan housing (30) and the mounting part (34) to one another. A second circuit board (54) is arranged between the mounting part (34) and the fan housing (30) and is electrically connected to the first circuit board (52). The structure provides space for additional motor control components, particularly in small-sized motors.

Abstract: An impeller for use in conjunction with a percutaneously-insertable blood pump or other rotatable equipment includes a blade that is segmented into a plurality of overlapping or abutting bladelets. In some embodiments, the bladelets are foldable and one side of each bladelet is concave.

Abstract: An inner rotor type motor includes a base having a pivotal portion. A stator is mounted to the base and includes a body and a coil unit engaged with the body and surrounding a hole of the body. A rotor includes a rotatable member, a shaft, and a permanent magnet. The rotatable member includes an engaging portion and a sidewall provided along a periphery of the engaging portion extending into the hole of the stator. The shaft includes an end coupled to the engaging portion. The other end of the shaft is coupled to the pivotal portion. The permanent magnet is mounted to an outer periphery of the rotatable member and aligned with the coil unit. The axial length of the shaft without the permanent magnet mounted thereto can be reduced, allowing reduction of axial heights of the motor and a heat dissipating fan utilizing the motor.

Abstract: An electronic device is provided. The electronic device includes a mechanism, a circuit module and a fixing element. The circuit module is disposed inside the mechanism. The circuit module includes a circuit board and a fan. The circuit board has at least one edge and a fixing hole. The fan has a first lateral side and a second lateral side. The first lateral side has a first hook buckled on the edge. The second lateral side has at least one screwed board, wherein the screwed board has a screwed hole. The fixing element is screwed on the screwed hole and the fixing hole to screw the fan on the circuit board.

Abstract: Pumping units are known to have an inlet channel, opening out into a pumping channel and tapering from an inlet cross section to an outlet into the pumping channel with an outlet cross-section. The flow is deflected through ninety degrees on entry to the pumping channel which induces strong swirling. The transition from the inlet channel into the pumping channel is not optimal for flow. This effect reduces the efficiency of the pumping unit. The inlet flow into the pumping channel is improved in the pumping unit according to the invention and hence efficiency is improved. According to the invention, the outlet is essentially provided in a first quadrant with relation to the inlet cross section and the tapering of the inlet channel essentially occurs in the other three quadrants. The tapering wall of the inlet channel is formed by a plane-generating shape which goes around from one side of the outlet to the other side of the outlet and is shaped to be increasingly flat relative to a plane of the outlet.

Abstract: A rotary pump including an impeller rotatable within a housing. A load is imposed on the impeller as it rotates, in a direction that is substantially parallel to the axis of rotation and wherein the load stabilizes the motion of the impeller. The load may be achieved by magnetically biasing the impeller.

Abstract: A rotary pump (1), which can be operated by an electronically commutated DC motor (56) with an axial gap, with a dry space (54), in which a wound stator (55) is accommodated, and a fluid-fillable pump space (13), in which a permanent magnetic pump impeller (5) is accommodated to rotate, the pump impeller (5) being separated by a split plate (18) from stator (55), which is connected to a return ring (27), to which several poles (15) are connected, and a circuit board (17), and is in heat-conducting contact with it, and includes a heat conducting element (10) from a good heat conducting light metal. The heat conducting element (10) consists essentially of a disk (40) aligned at right angles to the motor shaft or an annular disk with a coaxial tube (39) extending in the direction of the pump impeller in one piece with it, open or closed toward the motor shaft, and that the circuit board (17) is connected to the heat-conducting element (15) on the side facing away from the pump impeller (5).

Abstract: A brushless fan motor includes a case, a tubular part disposed in the case and fixed at a bottom of the case, at least a bearing disposed in the tubular part, a toric coil surrounding the tubular part, and a rotating assembly. The rotating assembly includes a turntable, a rotating shaft, a loading ring, a permeability metal element and a toric radial magnet. The turntable has a top surface and fan blades disposed on the top surface. The rotating shaft is disposed through the bearing and connected to the turntable. The loading ring connected to the turntable surrounds the toric coil. The permeability metal element includes an annular part fixed at an inner wall of the loading ring. The toric radial magnet is fixed at an inner wall of the annular part. A positive airway pressure breathing apparatus using the brushless fan motor is also provided.

Abstract: An exemplary heat dissipation fan includes a rotor and a stator. The rotor includes a hub, a central shaft extending down from a top end of the hub, the shaft having a free end far from the top end of the hub. A magnetic element attached to an inner periphery of the hub. The stator includes a stator core consisting layers of yokes, two insulation frames mounted at two opposite ends of the stator core and a coil wound around the insulation frames. An outer surface of the stator faces and is spaced from an inner surface of the magnetic element of the rotor with a clearance defined therebetween. A width of a bottom end of the clearance adjacent to the free end of the shaft being smaller than a width of a top end of the clearance.

Abstract: A cooling fan includes a fan housing, a stator and a rotor received in the fan housing. The rotor includes a shaft, a hub engaged with the shaft, a plurality of rotary blades extending outwardly from the hub, a connecting member and a magnet mounted in the connecting member. The hub includes a plurality of hooks. The connecting member has a flange clasping the hooks of the hub to mount the magnet in the hub.