The airflow direction is consistent and discharged outward from the chassis. Cooling fan The operating principle is based on energy conversion, specifically: electrical energy → electromagnetic energy → mechanical energy → kinetic energy. Classification: 1. Axial-flow fans: The blades of an axial-flow fan propel air to flow 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 axis direction. 2. Centrifugal fans: When a centrifugal fan is operating, its blades propel air to flow in a direction perpendicular to the shaft (i.e., radially). Air enters along the axis direction but exits perpendicularly to the axis direction.

Cooling fans are widely used in both everyday life and industrial applications, and they are extensively employed in computers. They find applications in communication products, optoelectronic devices, consumer electronics, automotive electronics, converters, medical equipment, heaters, air conditioners, inverters, ATM machines, freezers, welding machines, induction cookers, audio equipment, environmental protection devices, refrigeration equipment, and other traditional or modern appliances. Today, a DC cooling fan manufacturer will introduce you to the maintenance methods for cooling fans.

Noise from cooling fans: Cooling fans generate noise because their blades periodically experience pulsating forces caused by the uneven airflow at the outlet. On the other hand, due to the non-uniform distribution of pressure on the blades themselves and across their surfaces, the rotation of the blades disturbs the surrounding air and nearby components, contributing to rotational noise. Furthermore, as gas flows over the blades, it creates boundary layers, vortices, and vortex shedding, leading to fluctuations in the pressure distribution on the blade surface and thus generating vortex noise.

To install a cooling fan, you first need to understand the functions of each wire connected to the fan’s interface. Only after making the correct settings and connections can the fan fully perform its intended function. So today, let’s share with you how to wire a cooling fan—and what are the steps involved in wiring a cooling fan?

When using a cooling fan, it’s important to pay attention to certain details, as this will help extend the fan’s lifespan. 1. Do not touch or press against the fan blades, nor wrap the power cord around the fan or pull on the power cord. Doing so could damage the shaft and the power cord. 2. Avoid allowing dust, water droplets, or small insects to enter the fan, as these can shorten its lifespan and lead to defective products. 3. Do not use the fan in environments containing flammable gases or any harmful substances. 4. Use the fan within six months; prolonged storage may affect its performance due to the storage environment. 5. While the fan is running, do not attempt to lock it in place for an extended period. Doing so could cause the fan to overheat and burn out from continuous stoppage and lack of rotation.

Under the condition that the heatsink material is the same, airflow is the most important metric for evaluating the heat dissipation capability of an air-cooled heatsink. Obviously, the greater the airflow of a heatsink, the higher its heat dissipation capacity will be. The airflow rating of a cooling fan is a crucial performance parameter for the fan itself. When a fan’s airflow exceeds the actual range we need, it constitutes a waste of resources and can also create certain obstacles in our use of the fan. Although there are still some methods available to control the airflow of cooling fans, we must first gain a thorough understanding of the relevant knowledge about cooling fans before we can effectively manage their various parameters. Next, our editor will share with you some tips on how to avoid excessive airflow in cooling fans.

In recent years, cooling fans have reached a fully mature stage in terms of both technology and performance. Many factories now use them to dissipate heat from various types of machinery. However, due to a variety of different factors, these fans can sometimes experience malfunctions during operation. Next, we’ll introduce you to some common faults found in cooling fans.

Nowadays, cooling fans are being used in more and more applications, and temperature-controlled cooling fans are also becoming increasingly common. But do you know what precautions should be taken when using temperature-controlled cooling fans? Let’s find out together with the editor! First, let’s take a look at the principle behind temperature-controlled cooling fans: As the heat around the fan increases, the fan’s rotational speed automatically rises, thereby boosting airflow (increasing the air volume discharged). These fans use thermistors to detect temperature; sensors mounted on the fan hub can measure the temperature of the air passing through the fan. In this setup, it’s crucial to install the fan correctly. Once the fan is installed, the thermistor sensor can detect temperature changes via special connecting wires.