Examples of common types and features of cooling fans
Category:
Industry Trends
Release time:
2022-04-11
As soon as it comes to... Cooling fan People know that there are many types of these fans, and different types come in numerous models with varying specifications. To choose the right fan for your needs, you’ll need to have a solid understanding of the different options available. Do you know what common types of cooling fans there are, and are you familiar with their characteristics? The common types of cooling fans are as follows:
An axial-flow fan’s blades promote airflow in the same direction as the shaft. The impeller of an axial-flow fan is somewhat similar to that of a propeller. During operation, most of the airflow flows parallel to the shaft—in other words, along the axial direction. When the inlet airflow of an axial-flow fan is free air with zero static pressure, its power consumption is at its minimum; as the back pressure of the airflow increases during operation, so does the power consumption. Axial-flow fans are typically mounted on the enclosures of electrical equipment and sometimes integrated directly into motors. Due to their compact structure, axial-flow fans can save considerable space, are easy to install, and have a wide range of applications.
Axial-flow fan characteristics: high airflow. In a centrifugal fan, the blades propel air to flow perpendicular to the shaft (i.e., radially). Air enters along the axial direction and exits perpendicularly to the shaft. In most cases, using an axial-flow fan can achieve the desired cooling effect; however, if 90-degree airflow rotation or higher air pressure is required, a centrifugal fan must be selected. Strictly speaking, a fan can also be classified as a centrifugal fan.
Centrifugal fan characteristics: limited flow rate. High-pressure mixed-flow fans, also known as diagonal-flow fans, may at first glance appear no different from axial-flow fans. In fact, however, the inlet of a mixed-flow fan is aligned along the axis, while its outlet is directed diagonally—both along the axis and perpendicular to it. Because the blades and outer casing are shaped like a cone, these fans generate high static pressure. Under the same dimensions and other comparable performance parameters, centrifugal fans tend to be quieter than axial-flow fans. Mixed-flow fan characteristics: high flow rate and relatively high static pressure. Cross-flow fans can produce airflow over large areas and are commonly used to cool large surfaces of equipment. The inlet and outlet of this type of fan are both perpendicular to the axis. Cross-flow fans operate using long, bucket-shaped impeller blades. The diameter of the bucket-shaped blades is relatively large. Due to their larger diameter, these fans can maintain adequate overall air circulation even when operating at relatively lower speeds, thereby reducing noise levels associated with high-speed operation.
The cross-flow fan generates a large-area airflow and is typically used to cool large surfaces of equipment. The fan’s inlet and outlet are positioned perpendicular to the shaft axis. The cross-flow fan operates with a relatively long, bucket-shaped impeller. The diameter of the bucket-shaped blades is comparatively large. Due to this larger diameter, the fan can operate at a relatively lower speed while still ensuring efficient overall air circulation, thereby reducing noise levels associated with high-speed operation.
Mixed-flow fan characteristics: low flow rate and low static pressure. China has various types of axial-flow fans, centrifugal fans, and mixed-flow fans.
Among them, the Jiangshan Lai Technology DC fan is an axial-flow fan. Under this type, you can choose from various fan models. Our cooling fans are widely used in industries such as telecommunications equipment, LED stage lighting, medical devices, aerospace, and others.
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