Cross flow fans are widely used, and some problems will inevitably occur in the process of long-term use. For example, cross flow fans sometimes experience surge. The surge phenomenon of the fan is like asthma, the fan periodically blows out and reverses the flow, and severe surge can also cause fatigue damage to the cross flow fan blade.

When the cross flow fan has surge phenomenon, there will be the following three manifestations.

1. Noise increases.

When the cross flow fan is working normally, the noise is relatively small. However, when the surge phenomenon occurs, the inside of the fan sometimes makes a dull sound, and sometimes makes a sharp sound, and the sound is relatively loud.

2. Vibration intensifies.

When the cross flow fan has surge phenomenon, there will be obvious vibration phenomenon.

3. Difficulty reading.

When the surge phenomenon occurs in the cross flow fan, the value displayed by the micro pressure gauge and the rotational speed torque meter changes rapidly, and the range and amplitude of the change are very large, showing a periodic change.

So for the surge phenomenon of the cross flow cooling fan, there are the following solutions.

1. The ambient temperature should be 75ºC≥-40ºC.

2. The industrial gas passing through the cross flow fan is not allowed to contain strong acid, strong alkali and various solutions.

3. Dust and other sundries are not allowed to fall into the fan, so as not to cause the fan to burn and the fan blades to break.

4. Before installation, check whether the fan is damaged or deformed due to packaging and transportation. If there is damage or deformation, it should be repaired and installed.

5. Check whether the parts and screws are loose, and whether the blades and the air duct collide or shift. If they collide or shift, they should be adjusted and installed.

If you would like to know more about mini cross flow fans and other types of fans, please feel free to contact us.

The cross flow cooling fan impeller is multi blade type. The shape is long cylindrical, with front multi wing blades. When the impeller rotates, the air flow enters the blade column from where the impeller is opened. The volute is discharged from the blade column on the other side through the impeller to form the working air flow. This is a brief introduction and working principle of the cross flow fan. Next, let's understand the characteristics and application fields of the lower cross flow fan.

Features of cross flow fan:

1. The cross flow cooling fan uses a long barrel fan impeller to work, and the diameter of the barrel fan blades is relatively large. Because of the large diameter, on the basis of ensuring the overall air circulation, a relatively low speed can be used to reduce the noise caused by high-speed operation.

2. The cross flow fan blades have been carefully designed to make the distance between the blades disorderly, presenting a situation of "unequal spacing". This irregular distance phenomenon can make the audio produced by the wind wheel and the air irregular, thus becoming a piece of wind noise rather than a noise concentrated on a certain audio segment. Obviously, this broadband noise is close to the state of nature, so it will not sound so upset.

3. Considering that the whole blade of cross flow fan is not in a straight line, but is sagging in the middle. If inferior materials are used to manufacture the fan blades, although it can help enterprises reduce costs, obvious deformation is likely to occur. In this case, it can be imagined that the noise of drooping fan blades during high-speed operation is terrible, and will also lead to extremely obvious vibration.

There are many types of cross flow fans on the market, such as DC cross flow fans and AC cross flow fans. Cross flow cooling fans are also widely used in air purifiers, wine coolers, fireplaces, refrigerators, solariums, subways, combine harvesters and other equipment.

If you are looking for mini cross flow fan wholesale, please feel free to contact us.

In general, the higher the fan speed, the greater the air volume. The cooling fan generates airflow by rotating the blades, and an increase in speed causes the blades to push more air per minute, and when more air can be pushed, the volume of air will also increase. So when customers pursue high air volume, they often choose high rpm exhaust fans.

(12038 DC fan is used as an example.)

It should be noted that although there is a positive correlation between speed and air volume, the relationship is not linear. In some cases, as the rotational speed increases, the increase in air volume may slow down. This is due to the influence of the fan's design and performance characteristics as well as hydrodynamic effects.

Hydrodynamic effects are physical phenomena and behaviors that occur when involving the movement of fluids, such as air. First of all, when the fan rotates, there will be resistance between the blade and the air, and the larger resistance will reduce the air volume, while the smaller resistance will increase the air volume. In addition, the shape and Angle of the fan blades also affect the pressure difference of the air, which in turn affects the size of the air volume.

Secondly, during the operation of the fan, the turbulence generated by the rotating blade will lead to the instability of the air flow, thus reducing the air volume. The shear layer will form higher and lower velocity airflow regions, which will also affect the distribution and size of the air volume.

In addition, the design of the import and export area, boundary layer effect and fan rotation will have an impact on the fan; And other factors of the cooling fan, such as blade design, blade number, fan diameter and motor power, will also affect the air volume.

Guangdong Chungfo Electronic Technology Co., Ltd. is dedicated to the equipment cooling needs of various industries, is a professional cooling fan manufacturer. If you are looking for axial cooling fans, cross flow cooling fans or other types of cooling fans, please feel free to contact us.

Cross flow fans are an important type of cooling fan, commonly used in various applications to provide effective air circulation. These fans are characterized by their unique design, which can provide continuous and uniform airflow even in narrow spaces. In this article, we will discuss the main functions and advantages of cross flow fans, with a special focus on 12V DC cross flow cooling fans.

First, cross flow fans are designed to provide efficient cooling solutions, making them ideal for electronic devices, servers, and other applications that require reliable and effective cooling. Unlike traditional axial flow fans that provide linear airflow, cross flow fans have a curved blade design that produces circular airflow. This design allows them to move air over a wider surface area, making them very effective in cooling large areas.

When it comes to dc cross flow fans, their key advantage is their low voltage requirements. The cross flow fan 12v is ideal for low power applications such as portable electronics, automotive cooling systems, and small appliances. They are also very energy efficient because they consume less power than traditional AC fans, which helps reduce overall energy costs.

Another major advantage of cross flow fans is their compact size and lightweight design. Due to their unique blade design, these fans can provide a large volume of airflow in relatively small packages. This makes them ideal for use in space expensive applications, such as servers, where multiple fans are typically required to provide sufficient cooling.

Overall, cross flow fans are a good choice for anyone seeking reliable and efficient cooling solutions. Whether you are looking for fans for server racks, automotive cooling systems, or portable electronic devices, a 12V DC cross flow cooling fan is a good choice. With their energy-saving operation, compact design, and high-performance features, these fans are sure to provide the cooling power you need where you need it most.

During the use of the cooling fan, the influence of humidity on the life of the fan cannot be ignored. Especially in industrial and household appliances, such as air conditioning cross-flow fans, cross-flow cooling fans and metal cross flow fans, humidity will not only affect the efficiency of heat dissipation, but also may adversely affect the internal structure of the fan.

How does humidity affect the life of the cooling fan?

High humidity environments pose multiple challenges to the motors, bearings and metal components inside cooling fans. High humidity may cause internal fan components to rust or corrode. In particular, fans with metal shells or internal components, such as metal cross flow fans, are more susceptible to humidity.

Chungfo's way of coping

In order to deal with the potential threat of humidity to the life of the fan, Chungfo strictly selects moisture-proof and rust-proof materials in the design and manufacturing process of the fan. For example, Chungfo's cross flow fan in air conditioners pay attention to corrosion resistance in the selection of materials, and have passed a number of humidity tests to ensure their long-term operation in high-humidity environments such as air conditioning equipment. Our cross-flow cooling fans are also designed with a moisture-proof seal structure, which effectively prevents moisture from entering the motor part, further extending the life of the fan.

Humidity has a profound impact on the life of cooling fans, especially for products such as metal cross-flow fans, cross flow cooling fans and air conditioning cross-flow fans that are exposed to high humidity for a long time. By selecting high-quality anticorrosive materials and conducting rigorous humidity life testing, Chungfo provides customers with more durable and reliable cooling fan products.