Cabinet cooling fan selection.mini handheld fan

　　The selection method of the cooling fan of the chassis cabinet:

　　1. Mixed flow fan. Mixed flow fans are also known as diagonal flow fans. Mixed-flow fans are no different from axial fans. In fact, the intake of mixed-flow fans is along the axis, but the exhaust is along the diagonal direction of the axis and the vertical axis. Due to the conical shape of the blades and the cover, this kind of fan has a higher wind pressure, and the noise of the centrifugal fan is lower than that of the axial flow fan under the same size and other comparable performance.

　　2. Centrifugal fan. The blades push the air to flow in a direction perpendicular to the axis (ie radial direction). When the centrifugal fan is working, the intake air is along the axis direction, while the air outlet is perpendicular to the axis direction. In most cases, the cooling effect can be achieved by using an axial fan. However, sometimes a centrifugal fan is necessary if the airflow needs to be rotated by 90 degrees or when a large air pressure is required. Strictly speaking, the fan is also a centrifugal fan.

　　3. Cross-flow fan. It is usually used to cool the large surface of the equipment. The air inlet and outlet of this fan are perpendicular to the axis. The cross-flow fan uses a relatively long barrel-shaped fan impeller to work. The cross-flow air flow can generate a large area of wind flow. The diameter of the barrel-shaped fan blades is relatively large. Because of the large diameter, it is possible to use a relatively low speed on the basis of ensuring the overall air circulation, thereby reducing the noise caused by high-speed operation.

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