According to the classification of the cooling fan air flow and its characteristics
According to the different flow in and out of the air flow of ventilation fan, we generally can be divided into the following several major categories:
a, axial flow fan
of axial flow fan blade air moving in the same direction as the axis ( Parallel to the direction) Flow ( Such as the right) 。 Axial flow fan impeller and propeller are similar, it at work, the vast majority of the flow of air flow parallel to the axis, in other words, is along the axis direction. Axial flow fan when inlet air flow is 0 static free air, the minimum power consumption. As the air flow back pressure rises when running power consumption will increase. Axial flow fan is usually mounted on the racks to electrical and electronic equipment, sometimes integration on the motor, because of the axial flow fan is compact structure, can save a lot of space, easy installation at the same time, so widely used. See square cooling fan base on the market can be classified as such.
the main characteristic of axial flow fan, high flow rate, medium wind pressure, satisfy the general environment of
2, mixed diaspora hot fan
mixed flow fan is also called the diagonal flow fan, this kind of mixed flow fan and the axial flow fan look from the appearance is no different, in fact, mixed flow fan inlet is along the axis, but outgassing is along the diagonal direction of the axis and vertical axis ( Such as the right) 。 This fan because of blade and casing said cone, so the air pressure is higher, under the same size and other comparable performance, compared with axial flow fan, centrifugal fan noise is lower. Such as the 5 e - 230 b should be classified into this type.
mixed diaspora hot fan main features: high flow rate and the relatively high wind pressure, in order to achieve better heat dissipation effect
3, centrifugal cooling fan, centrifugal fan,
blade air moving in a direction perpendicular to the axis phase ( The radial) Flow ( Such as the right) , inlet is along the axis direction, and the gas is perpendicular to the axis direction. In most cases, the use of axial flow fan can achieve cooling effect, however, sometimes you rotate it 90 degree if need air discharge or need larger wind pressure, you must choose a centrifugal fan. Cooling fan is strictly, also belong to the centrifugal fan. The centrifugal cooling fan sketch for small centrifugal cooling fan, we commonly used commonly for wing type centrifugal cooling fan, used machine, the appearance is different, but in principle is the same.
the main characteristics of centrifugal cooling fan: change the flow of wind, the more limited flow rate, high wind pressure
4, heat penetration diaspora
tubular radiator fan, and can be referred to as the cross flow fan, it can produce the wind flow of large area, usually used for large surface cooling equipment. This kind of fan inlet and vent are perpendicular to the axis ( Such as the right) 。 Heat penetration diaspora fan is to use a longer barrel shaped fan impeller, the round barrel the calibre of the blades are great, because the caliber is big, to ensure the overall on the basis of using low air circulation speed, thereby, reduce the noise caused by the high-speed operation. More used in the elevator, air conditioning, car etc equipment.
tubular wind key features: low flow rate, low air pressure, large heat dissipation area
the cooling fan is classified by air flow, more than can be roughly divided into four types, as long as the heat dissipation of need can be found one or more of the fan.
