Abstract: An impeller includes a hub and a plurality of blades. The blades are disposed around an outer periphery of the hub. Each of the blades includes a connecting end, a sweep-back part and a sweep-forward part. The connecting end is coupled with the hub. The sweep-back part is disposed at an edge of the blade and extended from the connecting end. An extending direction of the sweep-back part is opposed to a rotating direction of the impeller. The sweep-forward part is extended from the sweep-back part. An extending direction of the sweep-forward part is the same as the rotating direction of the impeller.

Abstract: A waterproof motor includes: a recess (15) and a shaft tube (11) disposed upright on one side (105) of a base (1); a waterproof cover (2) covering the one side (105) of the base (1) and having a through hole 21 correspondingly enclosing the shaft tube (11) and a protruding portion (22) correspondingly engaging the recess (15), a first space (18) formed between the waterproof cover (2) and the one side (105) of the base (1); a first circuit board (3) disposed inside the first space (18) and having a plurality of sensors (31, 32); a housing (6) having an opening (69) and connected to the other side (106) of the base (1); an insulation plate (7) covering the opening of the housing (6), a second space (68) opposite to the first space (18) formed between the insulation plate (7) and the housing (6).

Abstract: An air-extracting type heat dissipating apparatus includes a frame, a fan body, a plurality of air-inhaling holes and a plurality of air-exhaling holes. The side portion of the frame has an accommodating space. The fan body is disposed in the frame and has a first side and a second side. The air-inhaling holes are disposed on the side portion of the frame in corresponding to the accommodating space. The air-exhaling holes are disposed on the frame and located on the second side. An air is inhaled into the accommodating space through the air-inhaling holes, and exhaled to the first side through the air-exhaling holes, and then it is exhaled to the second side by the fan body.

Abstract: An airflow passage structure is applied to a fan. The airflow passage structure includes a sidewall and an airflow channel. The sidewall has uneven thickness. The airflow channel is defined by an inner surface of the sidewall, and includes a channel entrance and a channel exit. The channel exit is in communication with an airflow inlet of the fan. The diameter of the airflow channel is non-uniformly distributed.

Abstract: A waterproof motor includes: a recess (15) and a shaft tube (11) disposed upright on one side (105) of a base (1); a waterproof cover (2) covering the one side (105) of the base (1) and having a through hole 21 correspondingly enclosing the shaft tube (11) and a protruding portion (22) correspondingly engaging the recess (15), a first space (18) formed between the waterproof cover (2) and the one side (105) of the base (1); a first circuit board (3) disposed inside the first space (18) and having a plurality of sensors (31, 32); a housing (6) having an opening (69) and connected to the other side (106) of the base (1); an insulation plate (7) covering the opening of the housing (6), a second space (68) opposite to the first space (18) formed between the insulation plate (7) and the housing (6).

Abstract: A fan device includes an impeller, a motor, a fan frame, a circuit board and a covering member. The motor is used for driving rotation of the impeller. The fan frame includes an axial-flow channel for accommodating the impeller and the motor and includes a receptacle. The receptacle is defined by two airflow inlet/outlet plates, one channel wall and two lateral plates. The circuit board is accommodated within the receptacle. The covering member is used for sheltering the receptacle.

Abstract: A fan includes an impeller and an inner rotor motor. The inner rotor motor connects to the impeller and drives it to rotate. The inner rotor motor includes a bushing, a shaft, a magnetic conducting shell, a magnetic element and a stator. The shaft passes through the bushing and is coupled to the impeller. The magnetic conducting shell is coupled to the shaft and telescoped to the bushing. The magnetic element is disposed around outside of the magnetic conducting shell. The stator is disposed around outside of the magnetic element.

Abstract: An air-extracting type heat dissipating apparatus includes a frame, a fan body, a plurality of air-inhaling holes and a plurality of air-exhaling holes. The side portion of the frame has an accommodating space. The fan body is disposed in the frame and has a first side and a second side. The air-inhaling holes are disposed on the side portion of the frame in corresponding to the accommodating space. The air-exhaling holes are disposed on the frame and located on the second side. An air is inhaled into the accommodating space through the air-inhaling holes, and exhaled to the first side through the air-exhaling holes, and then it is exhaled to the second side by the fan body.

Abstract: A phase-locked loop (PLL) with novel phase detection mechanism is provided, including a phase frequency detector (PFD), a controller, a digital-to-analog (D2A) module, and a voltage-controlled oscillator/current-controlled oscillator (VCO/ICO), wherein PFD has a reference signal input and an input from the output signal of the VCO/ICO and is connected to the controller, the controller is then further connected to the D2A module, the D2A module converts the control signal from the controller into an analog voltage to control the frequency and phase of VCO/ICO. It is worth noting that the PFD of the present invention has a novel phase detection mechanism so that the phase detection can be accomplished by observing signal level transitions of the reference signal input and a delayed reference signal with respect to the output signal of the VCO/ICO without edge alignment. In addition, the novel phase detection mechanism also allows flexible reference signal input.

Abstract: A fan includes a frame, a motor, a hub and several blades surrounding around the hub. The frame includes a motor base, and the motor is disposed on the motor base and inside of the frame. The motor includes a bushing, a bearing, a shaft and at least one silicon steel sheet. The bushing has an internal wall, an external wall, and a hollow portion disposed between the internal wall and the external wall. The bushing is molded as a single piece and is unitary in construction. The bearing is disposed within the bushing, the shaft passes through the bearing, and the hub is connected with the shaft. The silicon steel sheet is disposed around the bushing.

Abstract: A fan device includes an impeller, a motor, a fan frame, a circuit board and a covering member. The motor is used for driving rotation of the impeller. The fan frame includes an axial-flow channel for accommodating the impeller and the motor and includes a receptacle. The receptacle is defined by two airflow inlet/outlet plates, one channel wall and two lateral plates. The circuit board is accommodated within the receptacle. The covering member is used for sheltering the receptacle.

Abstract: An airflow passage structure is applied to a fan. The airflow passage structure includes a sidewall and an airflow channel. The sidewall has uneven thickness. The airflow channel is defined by an inner surface of the sidewall, and includes a channel entrance and a channel exit. The channel exit is in communication with an airflow inlet of the fan. The diameter of the airflow channel is non-uniformly distributed.

Abstract: An impeller includes a hub and a plurality of blades. The blades are disposed around an outer periphery of the hub. Each of the blades includes a connecting end, a sweep-back part and a sweep-forward part. The connecting end is coupled with the hub. The sweep-back part is disposed at an edge of the blade and extended from the connecting end. An extending direction of the sweep-back part is opposed to a rotating direction of the impeller. The sweep-forward part is extended from the sweep-back part. An extending direction of the sweep-forward part is the same as the rotating direction of the impeller.

Abstract: The present invention provides fan with an inrunner motor. The fan includes a fan frame, a rotor and a stator. The fan frame includes a base. The rotor includes a hub, a bushing and a magnetic member, wherein the magnetic member sleeves on the bushing. The stator is disposed on the base and coupled with the rotor, and the stator includes a shaft through the bushing, wherein an end of the shaft is fixed on the base.

Abstract: A fan includes a frame, a motor and an impeller. The motor is disposed on the frame and coupled to the impeller to drive the impeller to rotate. The impeller includes a hub, a plurality of blades and an air exhausting structure. The hub has an opening formed on a top portion of the hub. The blades are disposed around the hub. The air exhausting structure is disposed in the opening for discharging hot airs generated by the motor out of the hub.

Abstract: A phase-locked loop (PLL) with novel phase detection mechanism is provided, including a phase frequency detector (PFD), a controller, a digital-to-analog (D2A) module, and a voltage-controlled oscillator/current-controlled oscillator (VCO/ICO), wherein PFD has a reference signal input and an input from output signal of the VCO/ICO and is connected to the controller, the controller is then further connected to D2A module, D2A module converts the control signal from the controller into an analog voltage to control the frequency and phase of VCO/ICO. It is worth noting that the PFD of the present invention has a novel phase detection mechanism so that the phase detection does not rely on edge alignment. In addition, the novel phase detection mechanism also allows flexible reference signal input, as opposed to the aforementioned fixed external source, such as, a crystal.

Abstract: A fan includes a frame, a stator and a rotor. The stator is disposed in the frame, and the rotor is disposed in the frame and coupled with the stator. The rotor includes a connecting element, an impeller and a shaft. The connecting element has a flange. The impeller is disposed on a periphery of the connecting element. The flange is embedded with the impeller. One end of the shaft is connected to the connecting element and the impeller is rotated when the shaft rotates.

Abstract: A fan includes a frame, a motor, a hub and several blades surrounding around the hub. The frame includes a motor base, and the motor is disposed on the motor base and inside of the frame. The motor includes a bushing, a bearing, a shaft and at least one silicon steel sheet. The bushing has an internal wall, an external wall, and a hollow portion disposed between the internal wall and the external wall. The bushing is molded as a single piece and is unitary in construction. The bearing is disposed within the bushing, the shaft passes through the bearing, and the hub is connected with the shaft. The silicon steel sheet is disposed around the bushing.

Abstract: A fan includes a frame, a motor and an impeller. The motor is disposed on the frame and coupled to the impeller to drive the impeller to rotate. The impeller includes a hub, a plurality of blades and an air exhausting structure. The hub has an opening formed on a top portion of the hub. The blades are disposed around the hub. The air exhausting structure is disposed in the opening for discharging hot airs generated by the motor out of the hub.

Abstract: The present invention provides fan with an inrunner motor. The fan includes a fan frame, a rotor and a stator. The fan frame includes a base. The rotor includes a hub, a bushing and a magnetic member, wherein the magnetic member sleeves on the bushing. The stator is disposed on the base and coupled with the rotor, and the stator includes a shaft through the bushing, wherein an end of the shaft is fixed on the base.