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.

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...

On July 25, colleagues from the Foreign Trade Department of Jiangshan attended the Foreign Trade Wisdom Forum hosted by Made-in-China.com’s Focus Business School in Fuyong. As negotiation is an essential part of foreign trade, mastering the techniques and strategies of negotiation is crucial for successfully closing foreign trade deals. During the session, the instructor shared experiences in negotiating with overseas clients through vivid real-world foreign trade cases.

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.

On July 11, colleagues from our foreign trade department attended a foreign trade training and exchange seminar hosted by Made-in-China.com in Longhua. During the seminar, the instructor shared practical insights and experiences on developing overseas customers. The venue was packed with small- and medium-sized manufacturing enterprises from Shenzhen that are committed to expanding into foreign markets. In the context of rising global trade protectionism, the seminar provided valuable advice and guidance for Shenzhen companies seeking to tap into overseas markets and chart a course for successful international expansion.