Performance of 110V and 220V AC cooling fans in different environments

Our 110V AC cooling fans and 220V AC cooling fans are designed with the effect of air density in mind. For example, 110V AC cooling fans are suitable for a wider range of applications, including low pressure or high altitude environments; 220V AC cooling fans perform well in industrial and commercial environments with large temperature fluctuations.

Select a proper cooling fan based on the environment

Choosing a suitable cooling fan should not only consider the voltage, but also pay attention to the impact of air density on the heat dissipation effect. As a professional 110 v ac cooling fan factory and a reliable 220 v ac cooling fan factory, as a cooling fan manufacturer, we provide professional advice to customers to help them choose the right 110V or 220V AC cooling fan according to their specific needs to ensure that the equipment can operate safely and stably in a variety of environments.

The cooling fans reliability of their bearings is very important, and the type of bearing used by the fan is also very important. So how to choose the cooling fan bearing system?

The best fan bearing system for cooling fans is double ball bearing. The advantages and disadvantages of sleeve bearing, ball bearing in fan bearing system as follows:

Advantages of using sleeve bearing

1. Resistant to impact of external forces, less damage caused during transportation.

2. The price is cheap, compared with ball bearings, the price difference is great.

Disadvantages of sleeve bearing

1. Dust in the air will be sucked into the core of the motor due to the operation of the fan motor, which will mix with the lubricating oil stored around the bearing to make the operation noise, or even get stuck.

2. Bearing inner diameter is easy to wear, short service life.

3. Can not be used in portable products.

4. The clearance between bearing and shaft core is small, and the operation and activation effect of motor is poor.

Advantages of using ball bearing

1. Metal bead operation belongs to point contact, so it is easy to activate the operation.

2. Rolling to generate friction, so the contact surface is small and the coefficient of friction is also small.

3. It can be used in portable products which are often operated in different angles and directions.

4. Compared with sleeve bearing, the service life is longer.

5. Ball bearing system features high efficiency and low heat generation.

Disadvantages of ball bearing

1. Bearing structure is quite fragile, unable to withstand the impact of external forces.

2. When the motor is rotating, the rolling of the metal bead will produce a large noise.

3. The process is more complex and the price is high, so it can not compete with the oil bearing in the cost price.

4. Ball bearings use the elasticity of spring to position them, and it is not easy to assemble them.

Ball bearings are used for high speed fans and sleeve bearings are used for low speed fans. More advanced than single ball is double ball bearing. Sleeve bearing life is generally 10,000 hours, single ball bearing is 30,000 hours, double ball bearing is more than 50,000 hours.

The ball bearing replaces the sliding friction by rolling friction. The friction coefficient is small and overcomes the disadvantage that the friction coefficient is easily changed. Therefore, the running stability is strong and the service life is relatively long.

So choose the cooling ball bearing system to choose double ball bearings. It has advantages over other bearings in use.

Working principle of AC fan:

The difference between AC axial fan and DC axial fan is that the former power supply is AC, the power supply voltage is negatively altered, the fan power supply voltage is fixed, and the circuit control must be rely on circuit control, so that the two sets of coils will work to produce different magnetic fields.

AC cooling fan is fixed due to the power supply frequency, so the magnetic pole variation speed of silicon steel sheet is determined by the power supply frequency. The frequency of the high magnetic field switching speed is faster, theoretical speed is more faster, just like the DC fan is extremely more speed. same. However, the frequency can not be too fast, the frequency is not too fast, which will cause difficulty in starting.

Working principle of DC fan:

DC cooling fan, the conductor passes through the current, and the magnetic field is generated around. When the conductor is placed in another fixed magnetic field, suction or repulsive force will cause the object to move. Inside the DC fan, there is a magnetic rubber magnet with a magnetic property. Surrounded by silicon steel sheets, the axial part is wound into two sets of coils, and the Hall induction component is used as the synchronous detection device, which controls a set of circuits, which makes the two sets of coils that work around the axis.

Silicon steel sheets produce different magnetic poles, and the magnetic pole produces a remodeling force in the rubber magnet. When the rendering force is greater than the static friction of the fan, the blade naturally turns. Since the Hall induction component provides a synchronous signal, the sector is thus continuously. The piece provides a synchronization signal, and the blade is thus continuously running.

The importance of air density for cooling fans

The air density is the key factor affecting the cooling performance of the cooling fan. Under different environmental conditions (such as temperature, altitude and climate), the air density will change, which will affect the heat dissipation effect. As a professional cooling fan manufacturer, our products cover 110V AC cooling fan and 220V AC cooling fan. We are both a professional 110 v ac cooling fan factory and a reliable 220 v ac cooling fan factory , committed to providing high-quality cooling solutions in various air density environments.

Influence of air density on cooling effect of cooling fan

High-density air (cold air) environment: In an environment with higher air density, such as a low temperature environment, the air contains more molecules per unit volume, making the air able to carry more heat, so the heat dissipation effect is better.

Low-density air (hot air) environments: At higher temperatures or at high altitudes, the air is less dense, reducing its heat transfer capacity. In this environment, the efficiency of the cooling fan will be reduced, especially for 220V AC cooling fans, and the performance in low-density air is an important design consideration.

How to measure the noise of cooling fan? What are the main factors related to the noise generated by cooling fans? How should we reduce the noise of cooling fans?

1、How to measure the noise of cooling fan?

Noise is the sound level generated by the cooling fan during operation, and its unit is decibel (dB).

Quiet cooling fan, when measuring the noise of the cooling fan, it needs to be carried out in a Anechoic Chamber with noise less than 17dB, one meter away from the fan, and aligned with the air inlet of the fan along the direction of the rotating shaft of the cooling fan.

The spectral characteristics of the noise of the cooling fan are also very important, so it is necessary to record the noise frequency distribution of the cooling fan with a spectrometer. Generally, it is required that the noise of the cooling fan should be small and there should be no abnormal sound.

2、What are the main factors related to the noise generated by cooling fans?

The noise of high speed exhaust fan is related to friction and air flow. The higher the rotating speed and the larger the air volume of the cooling fan, the greater the noise will be.

In addition, if the fan bearing lacks lubricating oil or has too much dust, it will also cause fan noise, which needs to be maintained and cleaned in time, so as not to damage the hardware equipment due to blocked cooling.

3、How should we reduce the noise of cooling fans?

To solve this problem, we can try to use larger cooling fans. Under the condition of the same air volume, the working noise of the fan with large size at lower speed is smaller than that of the fan with small size at higher speed.

Another factor that we easily overlook is the bearing of the cooling fan.

Brushless motor fan, because the rotating shaft and bearing collide with each other when the cooling fan rotates at high speed, it is also a main source of noise of the cooling fan.

Cooling fans are widely used, and their application environments are different. In harsh environments, such as outdoors, damp and dusty places, cooling fans are generally equipped with waterproof grade, that is, IPXX.

IP is the abbreviation of Ingress Protection, and IP grade is the protection grade against foreign body intrusion of electrical equipment shell, which comes from IEC 60529, the standard of International Electrotechnical Commission, which was also adopted as the national standard of the United States in 2004. In this standard, for the protection of electrical equipment enclosure against foreign objects, the format of IP grade is IPXX, where XX is two Arabic numerals, the first mark number indicates the contact protection and foreign object protection grade, and the second mark number indicates the waterproof protection grade.

IP is the code used to identify the protection level in the world. The IP level consists of two numbers. The first number indicates the range of dust resistance of the equipment, I represents the level of preventing solid foreign objects from entering, and the highest level is 6; The second number indicates the degree of waterproof, P represents the level of preventing water ingress, and the highest level is 8. For example, the protection grade of industrial cooling fan, ventilation system fan and air radiator fan is IP54, which is the most basic waterproof grade for short, namely, three-proof paint. The process is to immerse the whole PCB board. Now, the highest waterproof grade that the cooling fan can achieve is IP68, which is completely isolated from the outside world by vacuum coating or glue filling.

The first digit indicates the dustproof index:

The second digit indicates the waterproof index:

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.

DC axial fan is made of PBT material. When it is working normally, the service life can be as high as 50,000 hours. The internal structure of the DC has a transformer and a main control board, which will not be affected by voltage fluctuations, so it is used Longer life.

High speed axial fan, its rotor contains DC cooling fan blades, which are the source of air activity, the fan axis, and are used to support the rolling of the balanced fan blades, the rotor magnetic ring, and permanent magnets. Ring frame, fixed magnetic ring.

In addition, DC cooling fan also includes a supporting spring, through which all the components and motors of the tube rolling are fixed, the rolling direction is produced, and the key to the size of the rolling speed can be activated. Its speed regulating performance is good, and the control is simple.

Generally, a cross flow fan has a multi-blade, long cylindrical impeller with forward multi-wing blades. At present, our cross flow fans are mainly divided into two types: AC cross flow fans and DC cross flow fans.

Cross flow cooling fan has a complicated internal structure. Although its impeller circumference is symmetrical, its airflow activity is asymmetrical, and its relative velocity field and absolute velocity field are unstable. The moving medium enters the impeller twice, and the rotor impeller moves along the circumference constantly.

There is a vortex on the inner side of one side of the impeller circumference that can control all airflow activities, that is, the so-called bias vortex of the cross flow fan. The vortex base is somewhere in the inner circumference of the impeller, and moves along the circumferential direction with different saving situations. It is the existence of this eccentric vortex that leads to cross flow.

Under certain working conditions, when the cross flow fan rotates at high speed, the gas in the cross flow fan cannot be discharged or sucked normally because of the enhanced control force of the eccentric vortex, and the experimental system presents an abnormal situation, which is called surge scene.

If the vent area is small, the resistance of the resistance layer is large, and the flow rate in the pipeline is small, the operation request of the cross flow fan is low, and the effect of deflecting the vortex is not obvious under the small flow rate. However, when the rotating speed is high and the vent area is large, the control force of the eccentric painful vortex is enhanced, and the gas in the cross flow fan can not be discharged or inhaled normally, so the experimental system is abnormal.

Current speed control by adjusting the input current to achieve speed control, the main features include:

High precision: can achieve more detailed speed adjustment, suitable for precision equipment.

Fast response: Especially suitable for scenarios requiring frequent speed regulation or large load fluctuations.

High efficiency: It performs particularly well in complex use environments.

The advantage of Chungfo electronic technology

As a professional cooling fan manufacturer, Chungfo Electronic Technology has always been committed to providing customers with high-performance cooling solutions. We offer a wide range of axial fans that support customized speed control solutions to ensure optimal performance in different application scenarios.

As a professional wholesale mini axial cooling exhaust fan manufacturer and a professional ac axial fan supplier, we provide customers with various models of wholesale axial flow fans, suitable for medical, instrumentation and other high-precision fields. Provide customers with customized cooling solutions covering many fields. Our product line covers the full range of needs from household equipment to industrial cooling equipment, supporting wholesale procurement to help customers achieve efficient cooling and cost optimization.