Abstract: A fan includes a fan housing, a motor and an impeller. The fan housing includes a first pressure area, a second pressure area and a guiding portion. The pressure of the first pressure area is higher than the pressure of the second pressure area. The guiding portion has a first end and a second end, the first end of the guiding portion is disposed at the first pressure area and the second end of the guiding portion is disposed at the second pressure area for draining moisture gathered in the fan housing away from the first pressure area to the second pressure area. The motor is disposed in the fan housing, and the impeller is connected with the motor.

Abstract: An impeller includes a hub, a plurality of first blades, and a plurality of second blades. The first blades are disposed around the hub. The second blades are disposed between the first blades. The lengths of the second blades are shorter than those of the first blades. The impeller can avoid the airflow reflux and have good airflow efficiency.

Abstract: A fan includes a fan housing, a motor and an impeller. The fan housing includes a first pressure area, a second pressure area and a guiding portion. The pressure of the first pressure area is higher than the pressure of the second pressure area. The guiding portion has a first end and a second end, the first end of the guiding portion is disposed at the first pressure area and the second end of the guiding portion is disposed at the second pressure area for draining moisture gathered in the fan housing away from the first pressure area to the second pressure area. The motor is disposed in the fan housing, and the impeller is connected with the motor.

Abstract: A foreign-body-proof or water-proof fan includes an impeller and a motor. The motor includes a rotor, a stator, a housing, at least one bearing and a spacer. The rotor has a shaft. The stator is disposed corresponding to the rotor. The housing supports for the stator and the rotor and has an axial hole, and the shaft passes through the axial hole. One end of the shaft protrudes out of the housing and is connected to the impeller. The bearing for supporting the shaft is disposed in the axial hole and securely disposed in the axial hole. The spacer loops the shaft and urges against the bearing.

Abstract: An impeller includes a hub, a plurality of blades, and an annular structure. The blades are disposed around the hub. The annular structure is connected to the blades. The annular structure includes a plurality of apertures. A balance material is filled in the apertures to achieve rotational balance of the impeller. Furthermore, a fan with the described impeller is provided. The fan and the impeller improve rotational stability, reliability and product life.

Abstract: A fan and a motor thereof are disclosed. The motor includes a first module, a rotor assembly and a second module. The first module includes a housing and a stator assembly disposed within the housing. The rotor assembly includes a shaft and a magnetic element which mounts the shaft and is disposed corresponding to the stator assembly. The second module includes a base and a driving element disposed on the base and electrically connected with the stator assembly through a conducting structure. When the housing and the base are assembled, a space is obtained for accommodating the rotor assembly therein, and the shaft protrudes from the housing.

Abstract: A magnetic conducting housing of a motor includes a body and at least one first positioning structure. The magnetic conducting housing has a magnetic element disposed around an inner wall thereof. The body has a top surface and a side wall connected with a circumference of the top surface to form an opening. The first positioning structure extends from the side wall of the body and is close to the opening for holding the magnetic element. Also, a motor and a fan with above-mentioned magnetic conducting housing are disclosed.

Abstract: A motor includes a stator and a rotor. The stator has a magnetically conductive element. The rotor has a shaft and a magnetic element. The shaft penetrates through the magnetic element and the magnetically conductive element. The magnetic element is disposed corresponding to the magnetically conductive element. The stator and rotor are disposed within a closed space, and the shaft protrudes from the closed space. A fan for a vehicle is also disclosed.

Abstract: An impeller includes a hub, a plurality of first blades, and a plurality of second blades. The first blades are disposed around the hub. The second blades are disposed between the first blades. The lengths of the second blades are shorter than those of the first blades. The impeller can avoid the airflow reflux and have good airflow efficiency.

Abstract: A rotor structure of a motor includes a shaft, a holding ring, at least one connecting portion and a magnetic element. The holding ring is disposed on and connected with a periphery of the shaft. The connecting portion is disposed at a conjunction of the shaft and the holding ring. The magnetic element is disposed on a periphery of the holding ring.