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.

Servo motor, with its high precision, high efficiency and flexibility, has become the core driving component of modern industrial and intelligent equipment. Compared with the traditional dc micro brush motor and drive micro-motor, servo motor has stronger control ability and a wider range of application scenarios, and is occupying an important position in various fields.

Application scenario of servo motor

Industrial automation: servo motors are widely used in CNC machine tools, automated production lines and other equipment to provide high-precision power support.

Robot technology: servo motor is the core part of the robot joint, which can achieve multi-angle and multi-direction flexible movement.

Medical equipment: such as surgical robots, diagnostic equipment, servo motors can provide noiseless, high-precision drive.

As a professional cooling fan and motor manufacturer, Chungfo Electronic Technology not only provides DC micro-brush motor, but also provides driving micro motor and 1.2v dc vibrator motor , to meet customers' needs for high precision and high efficiency. Using high-quality materials and advanced processes, our servo motors combine performance and durability, making them the perfect choice for industrial and intelligent equipment.

For more information about servo motors or other products, please feel free to contact us!

Different types of speed regulation

1.Voltage speed regulation: By changing the input voltage to adjust the fan speed, mainly used in DC cooling fans. Although the cost is low, the accuracy and stability are slightly lower than that of current speed regulation.

2.PWM speed regulation: The use of pulse width modulation (PWM) signal to change the working period of the motor is currently the most widely used method, taking into account efficiency and accurate control.

3.Mechanical speed regulation: Adjust the speed by changing the fan blade Angle or installing different gears, which is more common in industrial heat dissipation equipment, but the adjustment process is more complicated.

4. Current speed control: Current speed control is a way to change the fan speed by adjusting the input current. It is usually used in DC cooling fans.

Practical application case analysis

Industrial heat dissipation device: For devices in high temperature environments, it is recommended to select the current adjustable speed fan, such as the axial cooling fan 110v, which can maintain stable performance under complex loads.

Household cooler fan: Choose the products provided by high quality cooler axial fan ac 220v manufacturer, which are both efficient and economical, suitable for scenarios requiring long-term stable operation.

Wholesale market demand: For customers who need to purchase in bulk, the axial flow fan wholesale price is more attractive, and it is also flexible to choose different speed regulation schemes to meet special needs

With the development of Internet information age, Industrial DC fans, Cooling fans, Cross flow fans and AC fans have been applied in many industries, such as household appliances, industrial equipment, electronic equipment, medical aviation and so on.

Have you ever encountered such a situation?

When the fan is used, the speed of the fan can meet the cooling requirements of the equipment, but when it is used for a long time, the speed of the fan will slow down.

What are the factors that make the speed of DC fan, Cooling fan, Cross flow fan and AC fan slow down?

1.First of all, fix the DC fan, Cooling fan, Cross flow fan and AC fan carefully when installing. If the fans are loose without fixing, the rotation speed of DC fan, Cooling fan, Cross flow fan and AC fan will also slow down.

2.Check the appearance of the fan for excessive dust accumulation, which makes it difficult for the fan to rotate. If there is resistance, the rotating speed will slow down. Therefore, pay attention to the environment of the fan and clean up the dust in time. In addition, a dustproof fan guard cover can be added to the fan, which not only enhances the fan air supply rate, but also functions to improve the overall performance of the fan.

3. The reason for the slow speed of the DC cooling fan may also be that there is a problem with the power supply, so users can also consider changing the silent power supply or cooling fan. There are many silent power supplies on the market at present, which are usually strictly tested and can effectively reduce the power supply noise. In addition, it can also change a better DC cooling fan for the power supply. The process of changing the power supply fan is also very simple. The key is to pay attention to the connection between the fan and the power supply.

Rotating speed is also one of the main parameters affecting the performance of cooling fans. Therefore, pay attention to check at any time!

Servo motor is a kind of high precision and high efficiency motor device, which is widely used in industrial automation, robot, aerospace and other fields. Compared with traditional motors, servo motors can not only provide stable rotation, but also accurately control speed and position, so they are called "smart motors".

Working principle of servo motor

The core of servo motor is closed-loop control system. It feeds back the operating state of the motor in real time through built-in sensors (such as encoders), comparing the actual position or speed with the target value. If there is a deviation, the controller quickly adjusts the current and voltage to ensure that the motor is operating as expected. This highly accurate feedback and adjustment mechanism makes the servo motor particularly suitable for scenarios that require precise positioning and dynamic response.

Chungfo motor solution

As a professional motor manufacturer, Chungfo Electronics has customized micro motor, waterproof dc rotor brush motor, ac shaded pole motor for you to choose. Technology focuses on providing motor solutions with stable performance and long life. Our motors use high-quality materials and advanced processes to meet our customers' demands for high performance and precise control. Whether it is industrial equipment or home intelligent devices, Chungfo Motor can provide you with reliable support.

For more technical details or product information, please feel free to contact us!

Overlapping design refers to optimizing the space layout of the fan blades or multiple fan modules to overlap the air flow paths of multiple fans to improve the air flow or heat dissipation effect. This design is suitable for equipment that requires efficient heat dissipation, especially in the case of limited space can significantly improve cooling efficiency.

Chungfo Electronics focuses on manufacturing a variety of efficient cooling fans, although our fans do not currently use overlapping blade design, but we use advanced materials and technologies, such as metal cross flow fan, bldc exhaust fan, plastic centrifugal fan, to ensure that the product in a long time to maintain efficient and stable heat dissipation capacity. Our 110V and 220V cooling fans perform well in industrial, domestic and electronic devices.

With the popularity of smart toilets, heat dissipation has become a key factor in the normal operation and extended service life of equipment. It is important to choose the right cooling fan, not only to consider the size, but also to choose the appropriate fan type according to the power and operating environment of the smart toilet, such as 5V blower, high speed exhaust fan, high quality mini axial flow cooling exhaust fan.

Size selection of smart toilet cooling fan

The internal space of the smart toilet is limited, so the size of the cooling fan is generally between 40mm and 70mm. Generally, 40mm x 40mm fans are suitable for compact design toilets, suitable for low power cooling needs. The 50mm x 50mm fan is a common general-purpose size, providing good air volume and low noise for moderate heat dissipation needs. If the power of the smart toilet is large, the 60mm or 70mm high-quality mini axial flow cooling exhaust fan can meet the large heat dissipation needs and provide a stronger cooling effect.

5V blower: The combination of miniaturization and efficient heat dissipation

Among smart toilets, 5V blowers are an ideal choice, especially for small or low-power toilet designs.

High speed exhaust fan: effectively respond to high heat dissipation requirements

For more powerful smart toilets, the high speed exhaust fan can quickly remove the heat inside the toilet. The high speed exhaust fan is widely used in most industrial toilets and is suitable for users who require high heat dissipation effect.

High quality Mini axial cooling exhaust fan: the perfect combination of silence and efficiency.The high quality mini axial flow cooling exhaust fan is favored by many smart toilet manufacturers because of its excellent cooling effect and silent performance.

During the working process, the sweeping robot will generate a certain amount of heat, especially in its internal motor, motherboard and battery parts. In order to ensure that the sweeping robot can run stably for a long time, heat dissipation fans are needed to assist heat dissipation. The following are the types of cooling fans commonly used by sweeping robots:

1. Axial cooling system fan

Features: large air volume, low noise, easy to install.

Application: It is suitable for the heat dissipation of the motherboard or battery of the sweeping robot, because these parts usually need a large airflow to reduce the temperature quickly.

2. 5v blower fan

Features: High wind pressure, capable of directional air transport.

Use: It is mostly used for the motor heat dissipation of sweeping robots, especially the brushless motor part, because the motor heat dissipation usually requires directional and strong air flow.

Chungfo is a high quality 220v ac cooling fan manufacturer, if you have the need to buy, you can contact us at any time.

Zoyn, in collaboration with China Jiliang University, DMEGC, and Earth-Panda, has made significant research breakthroughs in the precise detection and control technology of strategic key metal elements in magnetic materials, as well as its industrial application. This achievement has been nominated for the First Prize of the Zhejiang Provincial Scientific and Technological Progress Award.

 

The project addresses critical challenges in the detection of strategic key metal elements in magnetic materials, the influence of element site occupancy on magnetic properties, and precise control of key elements. Supported by national key R&D programs, National Natural Science Foundation key projects, and provincial key R&D initiatives, the research has achieved a series of significant outcomes:

 

1. Established precise detection technologies to monitor the distribution and lattice site occupancy of strategic key metal elements during production, enabling quantitative analysis of their distribution and state within materials.

2. Studied the migration behavior of key elements during non-equilibrium phase transitions and sintering processes, constructing a mapping model between element states and macroscopic performance.

3. Advanced multi-element, multi-step grain boundary diffusion control technology for heavy rare earth elements and crystal field regulation techniques for permanent magnetic ferrites.

These achievements enable the efficient utilization of strategic key metal elements, establish critical technologies for synergistically enhancing the formulation, processing, and performance of magnetic materials, and facilitate the development of high-performance rare-earth permanent magnets and ferrite products. Expert evaluations have recognized the results as internationally leading in the areas of precise detection of heavy rare earth and precious metals and resource-efficient utilization technologies.

 

The project has resulted in 32 core invention patents, 25 published papers, and three validated rare-earth element state detection technologies. Additionally, a Curie temperature detection device for magnetic materials was developed, with five national standards led and contributions to 13 other national standards. The research has also led to the development of 35 new products.