The basis of a centrifugal fan is a rotating blade wheel called an impeller, which drags the incoming air or gas into a circular motion. It is then pushed out of the fan by the centrifugal force created by the rotation. When entering and exiting the fan, the airflow changes direction. This is the centrifugal fan principle.

In order to ensure the normal operation of the fan and improve the service life of the fan, we often carry out regular maintenance and maintenance on the various parts of the fan.

1. From the principle of the centrifugal fan, it can be seen that the impeller is an important component, so the maintenance of the impeller is essential. First, the impeller must be checked for cracks, wear and other defects from time to time. Second, the impeller must be kept clean, and the dust and rust on it should be brushed off regularly with a wire brush, because with the increase of operating time, these dusts cannot evenly adhere to the impeller, which will cause the impeller to lose its balance and cause the rotor to vibrate. Third, as long as the impeller is repaired, it needs to be dynamically balanced. If possible, you can use a portable test balancer for field balancing.

2. We also cannot ignore the maintenance of the casing and the air intake chamber. In addition to regularly checking the casing and intake chamber for severe wear and heavy dust accumulation, also regularly check that all fastening bolts are tight.

3. Bearing maintenance is equally important. In daily use, it is necessary to check the oil supply of bearing lubricating oil frequently. If there is oil leakage in the tank, you can slightly tighten the bolts of the end cover. If that doesn't work, you may have to replace it with new packing.

4. If we do not use the centrifugal fan for a long time, what maintenance work can be done? 1. When the ambient temperature is lower than 5 °C, the remaining water in the equipment and pipelines should be drained to prevent the equipment and pipelines from freezing. 2. Coat the surface of main parts such as bearings with anti-rust oil to avoid corrosion.

Guangdong Chungfo Electronic Technology Co., Ltd. focuses on the cooling needs of equipment in various industries, specializing in the research and development and supply of cooling fans such as DC cooling fans, AC cooling fans and DC blowers. For example, 5v centrifugal fan, 12v centrifugal fan, etc., we can provide professional customization of cooling fans according to customer needs.

In the global market, fan exports need to comply with national regulations and standards, and different regions have different requirements for fan safety, energy efficiency and environmental protection. As a professional fan manufacturer, Guangdong Chungfo Electronic Technology Co., Ltd. is committed to providing 24v dc cooling fan Wholesale, 12v centrifugal fan and mini cross flow fan in line with international standards, to ensure that customers successfully pass the market access requirements of various countries. This article will introduce the fan certification requirements of major exporting countries or regions to help companies and buyers better understand the industry norms.

1. European Union (EU) : CE and RoHS certification

CE certification (Conformite Europeenne)

CE certification is a prerequisite for fan products to enter the EU market, mainly involving safety, electromagnetic compatibility (EMC) and energy efficiency requirements. For wholesale customers of 24V DC cooling fans, it is necessary to ensure that the products comply with the Low Voltage Directive (LVD) and electromagnetic Compatibility Directive (EMC) to avoid electromagnetic interference affecting other equipment.

RoHS Certification (Restriction of Hazardous Substances Directive)

RoHS certification (Restriction of Hazardous Substances) requires that fan products must not contain lead, cadmium, mercury and other harmful substances, especially 12V centrifugal fans and small cross-flow fans are widely used in electronic equipment and industrial applications, and must meet environmental standards.

2. United States (USA) : UL and FCC certification

Underwriters Laboratories (UL)

UL certification is an American safety standard that mainly tests the electrical safety, heat resistance, and fire resistance of fans. In particular, high-power industrial fans, such as 12V centrifugal fans, need to comply with UL 507 standards to ensure that the fan will not cause fire or electrical failure during prolonged operation.

FCC Certification (Federal Communications Commission)

FCC certification is mainly for the electromagnetic compatibility of fans, especially the application of small cross-flow fans in smart homes and medical devices, which must comply with FCC Class B standards to ensure that fans will not interfere with other wireless devices.

3. China (CN) : CCC certification

China Compulsory Product Certificate (CCC) applies to some household and industrial electronic products, such as high-power cooling fans. Although CCC certification is not mandatory for small cross-flow fans or 12V centrifugal fans, obtaining this certification can improve recognition in the domestic market.

How to successfully pass the fan export certification?

1. Select suppliers that meet international standards - Guangdong Chungfo Electronic Technology Co., Ltd. strictly implements global certification standards and provides fan products that meet CE, UL, FCC, RoHS and other requirements.

2. Pre-product testing - Before applying for export certification, ensure that the product has passed the appropriate safety and EMC tests.

3. Pay attention to the updating of regulations in different countries - certification standards may be adjusted at any time, and it is recommended to work with professional bodies to ensure product compliance.

In the increasingly fierce competition in the global market, compliance certification has become an important guarantee for the export of fan products. Guangdong Chungfo Electronic Technology Co., Ltd. focuses on the production of high-quality fans, including 24V DC cooling fan wholesale, 12V centrifugal fan, small cross-flow fan and other products, to ensure compliance with national certification requirements, to help customers expand the international market.

If you have any questions about the export certification of fan products, please contact us, we will provide you with professional support!

In modern industry, electronic equipment and home appliances, the role of cooling fans can not be ignored. Today, we will take you to understand several common cooling fans and their wide application.

First of all, the dc cooling fan plays an important role in the current heat dissipation technology. Dc fans can not only operate efficiently at lower voltages, but also reduce power consumption and extend the service life of the equipment, especially suitable for applications with high energy efficiency requirements, such as computers, power supplies and medical instruments.

Secondly, 12v centrifugal fans are widely used in environments requiring high air volume and high pressure due to their unique design. 12v is especially suitable for automobiles, home appliances and mechanical and electrical equipment, which can ensure the stable operation of the system in high temperature environment and avoid failure caused by overheating.

In addition, tangential cross flow fan are widely used in air conditioning systems, kitchen appliances and coolers for their uniform airflow distribution and high static pressure characteristics. Because of its compact structure, low noise and stable wind speed, tangential cross-flow fans have been widely used in industrial and household appliances.

Whether it is DC cooling fan, 12v centrifugal fan or tangential cross flow fan, Chungfo Electronics products are adhering to the principle of high quality and high performance, and is committed to providing customers with the most suitable cooling solutions. Learn more about our cooling fan technology and application, please feel free to contact us! Chungfo Electronics, a professional cooling fan manufacturer, is committed to providing you with a comprehensive cooling solution.

Want a breath of fresh air? Choose a centrifugal fan with an air purifier! It's a winning combination, and let's see why.

First of all, the centrifugal fan can produce a high static pressure capacity during the rotation process, our centrifugal fan usually includes a rotating impeller and a spiral guide housing. This design can collect air in the center and spray it at a higher speed under the action of centrifugal force, resulting in a larger static pressure. This means that it can effectively capture and remove harmful substances such as particles, formaldehyde, and odors in the air to ensure the purity of indoor air.

Secondly, the application of centrifugal fans in air purifiers is also reflected in its silent performance. Some special designs of the blades of centrifugal fans will reduce the production of noise, just like our centrifugal fans usually use smooth blade curves to reduce the production of noise when the air flows. In some specific cases, we will also reduce the noise level of the centrifugal fan by increasing the number of blades, more blades can make the noise more easily isolated and dissipated. Noise is reduced, thus improving the user experience of the air purifier.

Our 12v centrifugal fan is a combination of the above two points, in addition to this fan, there are other fans you can choose, such as plastic centrifugal fans, brushless centrifugal fans, we are also a good choice for wholesale air centrifugal fans.