Cooling fans have now become ubiquitous across various industries—from earlier simple electronic components to today’s high-end, intelligent products. Smart home devices, car seat cushions, medical equipment, and many other applications have all adopted cooling fans on a large scale. In the medical field, many devices also rely on cooling fans, though the requirements for these fans differ significantly. In the medical industry, the primary function of cooling fans is ventilation rather than heat dissipation—after all, medical devices generally don’t generate much heat in the first place. Thus, the role of installing cooling fans in such devices is primarily to ensure adequate airflow. When selecting a fan, it’s crucial to pay attention to its stability, static pressure, airflow volume, and noise level. Therefore, the wind...

The operating principle of a cooling fan is based on energy conversion: electrical energy → electromagnetic energy → mechanical energy → kinetic energy. The circuit principles underlying these fans typically come in various forms; depending on the specific circuit design used, the fan's performance will differ accordingly. Cooling fans are characterized by their high rotational speed, large airflow, excellent cooling efficiency, and ease of use. They can be applied across a wide range of industries, and the market size is substantial with a great variety of models available. When purchasing a cooling fan, some users may ask the seller whether they are directly from the manufacturer, as there are refurbished cooling fans available on the market—though those sold directly by the manufacturer will never be refurbished. Refurbished cooling fans do not perform as well as brand-new ones, so...

1. Fan Testing Methods: 1.1 Current: The current shall be measured after the fan has been running continuously for 3 minutes. 1.2 Rotational Speed: The rotational speed shall be measured after the fan has been running continuously for 3 minutes. 1.3 Starting Voltage: The voltage required to start the fan operation upon turning the switch “ON”. 1.4 Input Power: The input power shall be measured after the fan has been running continuously for 3 minutes. 1.5 Locked Current: For fans capable of being locked, the locked current shall be determined by locking the fan in fresh air for 3 minutes. 1.6 Airflow and Pressure Data Measurement: According to the “AMCA Standard” or DIN 24163 regulations, these data shall be measured in a dual-pressure chamber, and the pressure values borne by each side of the pressure chamber must also be recorded.

The structure of a DC brushless cooling fan can be primarily divided into four main components: the rotor, the stator, the outer frame, and the motor (or engine), along with several smaller, miscellaneous parts. First, the fan rotor section includes the fan blades—the core component responsible for generating airflow—and the fan shaft, which supports and balances the rotation of the blades. It also comprises the rotor magnetic ring, permanent magnets that play a crucial role in switching magnetic poles and controlling rotational speed, and the outer frame of the magnetic ring, which secures the magnetic ring in place. Second, the fan stator section consists of supporting springs that separate and balance the shaft, bearings that provide high rotational speeds with low friction and long service life, a retaining ring that fixes the entire rotating assembly, and the motor itself, which generates the rotational direction and enables operation.

In industrial production, a wide variety of equipment is used. When these devices operate continuously for extended periods, they tend to generate heat and become hot. This is precisely when cooling fans come into play—providing essential cooling to maintain the equipment’s optimal operating condition. If the equipment isn’t cooled down in a timely manner, it could lead to damage of internal components, thereby disrupting production operations. Thus, the importance of cooling fans in industrial production is evident. Consequently, every enterprise strives to acquire cooling fans that boast high performance and superior quality. So, how can we fundamentally enhance the quality of cooling fans? First, the main components of a typical cooling fan generally consist of four major parts—the rotor, stator, outer frame, and motor—as well as various smaller auxiliary components.

Many people, when choosing DC cooling fans, simply pick a few manufacturers at random and decide based on price comparisons. However, when selecting a DC fan, you can’t rely solely on price. Below, we’ll show you how to choose a DC fan correctly. 1. Listen for noise: At the same rotational speed and voltage, the DC cooling fan with lower noise is better. This is because low noise is closely related to factors such as the blade design, bearings, lubricant quality, and assembly structure. The better the blade shape is designed, the greater the airflow will be—and the lower the noise will be too. The higher the bearing precision, the less friction there will be between the bearing and the shaft core; the more precisely the dimensions are matched, the lower the noise will naturally be. Lower noise indicates reduced friction.

Many people may not be aware of what to watch out for when installing cooling fans. We need to avoid the following practices, as they can significantly shorten the lifespan of the cooling fan. 1. Installing the fan upside down, with the blades facing downward: If the blades are left hanging in this position for an extended period, the rotor’s magnetic strength will weaken over time, causing the blades to get closer and closer to the stator. As a result, the cooling fan may fail to rotate due to poor induction. Fans that use oil-based lubricants are particularly prone to this issue, so structural design modifications are often required to address it. 2. Clamping the cooling fan from both sides or inserting a screw into each of the diagonal screw holes on the fan—both of these installation methods can easily lead to the cooling fan becoming stuck or damaged.

After prolonged use, cooling fans typically accumulate dust or other impurities. Proper cleaning and maintenance can significantly extend the fan’s lifespan. Below, we’ll outline some important precautions to keep in mind when using cooling fans: 1. While the fan is running, do not lock it in place for an extended period. Continuous shutdowns can cause the fan to overheat, potentially leading to damage or even burnout. 2. Do not leave a cooling fan idle for more than six months, as prolonged disuse and unfavorable storage conditions can degrade its performance. 3. Be aware that the fan blades can pose a risk of injury if you accidentally touch them while the fan is spinning at high speed. When the cooling fan is operating at high speeds, take care not to come into contact with the fan blades to avoid injury.