Many people are familiar with how cooling fans are used. Previously, we’ve shared information on troubleshooting cooling fan malfunctions, identifying their common causes, and ways to extend their lifespan. Today, let’s take a closer look at how these fans are designed. Step 1: The design of a cooling fan begins by measuring the relationship between its airflow volume and static pressure. Measuring the characteristics of airflow is quite challenging; currently, there are two main methods for determining static pressure and airflow volume: one is wind-tunnel testing, and the other is the dual-chamber method. The specifications for airflow and static-pressure characteristics are typically measured using the dual-chamber method. This method employs a variable-exhaust system to draw air out of the chamber, thereby adjusting air density. Instantly opening the nozzle will cause a sudden change in static pressure and airflow.

Today, there are many different designs for boosted cooling fans. Among these variations, the number of blades is often a source of confusion for customers—both in terms of design and actual use. Is it better to use a cooling fan with more blades, or is a fan with fewer blades preferable?

When using DC cooling fans, have you ever encountered situations where the fan malfunctions shortly after being put into operation? Like other machinery and equipment, DC fans require regular maintenance and inspections. By promptly identifying and addressing any issues, you can significantly extend their service life. Below are some maintenance guidelines and storage recommendations for cooling fans: 1. During operation, if you notice any abnormal noises from the fan, severe heating of the motor, live casing, tripped circuit breaker, or failure to start, you should immediately stop the fan and perform a thorough inspection. For safety reasons, repairs must not be carried out while the fan is running. After maintenance, it’s essential to conduct a trial run for about 5 to 10 minutes to ensure everything is functioning properly.

With the increasing demands of machinery and equipment, cooling fans have found applications in numerous fields. Typically, only when a fan operates normally to dissipate heat can it ensure the smooth operation of the machine; otherwise, various malfunctions—such as the machine coming to a halt—may occur. Therefore, to reduce the likelihood of failures, we must understand the root causes of these malfunctions and address them promptly. So, why do cooling fans fail? First, design-related issues: If cooling fan engineers make improper designs—failing to adequately consider the coordination among components or neglecting dynamic characteristics—this can lead to vibrations or noise during machine operation. Additionally, an unreasonable structural design or the inappropriate use of steel materials can result in stress concentrations, making the body material prone to cracking.

Row dragon boats, hang calamus—your future and career will be worry-free. Drink yellow wine, paste charms against the five poisons—may you enjoy blessings year after year; Tie hundred-strand cords, carry pouches—may you stay safe from evil and toxins throughout your life; Celebrate the Dragon Boat Festival, savor zongzi—may China’s timeless traditions endure forever. Shenzhen Jiangshan Lai Electronic Technology wishes everyone a happy Dragon Boat Festival! Jiangshan Lai Electronics has been professionally manufacturing DC cooling fans and DC blowers for 14 years, safeguarding the heat dissipation of your devices!

As the name suggests, cooling fans are primarily used to dissipate heat and cool various types of equipment. They are mainly employed in industrial settings, where the working environments tend to be quite complex. Therefore, cooling fans often undergo special treatments to prevent corrosion. Such treatments not only help extend the service life of the equipment but also reduce costs. So, what specific measures are typically taken? First, surface treatment of cooling fans: The surface protection of cooling fans is usually achieved through methods such as galvanizing, chrome plating, and chemical coating. These methods are effective in many environments; however, when it comes to rotating parts, careful selection is required, as the base material and the coating are two different materials with differing coefficients of linear thermal expansion.

As the market demand for fans continues to grow, they are now being used in a wide variety of settings and industries. Although DC fans and AC fans are readily available in our daily lives today, many people still aren't fully familiar with their specific characteristics. So, let’s take a closer look at the differences between these types of fans. First, the power supply methods differ: DC fans operate on direct current, while AC fans run on alternating current. Second, their operating principles differ: DC fans work by converting electrical energy into mechanical energy through direct-current voltage and electromagnetic induction, causing the fan blades to spin rapidly. This process relies on coils and ICs that continuously switch states, inducing the magnetic ring to drive the fan blades.

In daily life, I believe most people regularly inspect and maintain DC fans in mechanical equipment to extend their service life and reduce equipment maintenance costs. But does anyone know whether ambient temperature can affect the performance of these fans? Let me now address this question for you. Due to the materials and bearings used in DC fans, they are indeed influenced by environmental conditions and operational stress. If a DC fan operates in a high-temperature environment, it will accelerate the evaporation of lubricating oil in oil-lubricated bearings, causing the components to expand and potentially leading to friction. At the same time, the resistance of the coil will increase, setting off a vicious cycle of overheating. This, in turn, accelerates the degradation of electronic components.