Zhejiang Nicety Electric Machinery Co., LTD. (NEM), founded in 1993, currently NEM members are Hangzhou Sunlife Electric high-tech enterprise R & D center, Zhejiang Jiaxing Nicety production base and Longquan Nicety High-tech Enterprise company headquarters.
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The company has established a complete, effective quality management system, implemented the ISO/TS16949 international quality light system standard.
Products are mainly exported to North America, Europe, Middle East, Southeast Asia, South America and other countries and regions.
Unlike traditional fans that rely on brushes and commutators to operate, brushless fans use electronic circuits to control their rotation. This eliminates the need for physical brushes, resulting in a more efficient and reliable cooling solution. By utilizing magnets and sensors, brushless fans can dynamically adjust speed and airflow to optimize performance while minimizing energy consumption. Brushless fans are commonly used in a variety of applications that require cooling or air circulation, such as computers, electronics, and industrial equipment. Their energy efficiency, longevity, quiet operation, precise control, and compact design make them to traditional fans in a variety of applications. Whether in computers, industrial environments or automotive cooling systems, brushless fans deliver unparalleled performance and reliability. Employing this innovative cooling solution increases efficiency, reduces energy consumption and creates a more comfortable environment.
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An evaporative fan, also known as an evaporative air conditioner or wet cooler, is a device used to reduce ambient temperature. They cool the surrounding air by evaporating moisture, providing an energy-efficient and environmentally friendly air conditioning solution, especially suitable for dry and hot climate conditions. Evaporative fans use the evaporation principle of water to cool the air. During the evaporation process, a fan blows hot air through a water medium (usually wet filter paper or fluffy humidified fiber), so that the heat in the air is used to evaporate water, thereby cooling the air. This process lowers the temperature of the air while increasing its humidity. Evaporative fans typically consume less electrical energy than traditional refrigeration systems because they do not require compressed refrigerant. Additionally, evaporative fans do not emit harmful chemicals, making them environmentally friendly.
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A blower is a fan that uses a special voltage supply to drive the blower's rotor to create airflow. It usually consists of an electromagnet stator and a permanent magnet rotor. The coils on the stator generate a magnetic field through electric current, while the permanent magnets on the rotor are acted upon by a fixed magnetic field. When current passes through the stator coil, the force generated by the magnetic field rotates the rotor, thereby driving the equipment to operate. The blower motor is precisely designed and machined to ensure its efficiency and reliability. It usually has low noise, high efficiency, long life and stable performance. Blower motors are widely used in various fields, such as electronic equipment cooling, automobile ventilation, industrial production, etc.
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A brushed motor is a common type of DC motor with a relatively simple structure that uses brushes and brushes to transmit current to a rotating part to produce mechanical motion. A brushed motor consists of a rotating part called the rotor and a stationary part called the stator. The rotor usually includes permanent magnets, while the stator includes coils. Brushes and brushes are attached to the stator and they are in contact with the electronic slip rings of the rotating part so that current can enter the rotating part. The brushes are a conductive material, usually made of carbon or carbide, that are tightly attached to the stator along with the brushes (also called brush holders). The brushes pass current to the rotating part by contacting the collector ring (usually on the rotating part), thereby creating a magnetic field interaction and inducing rotational motion.
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Brushed electronic fan, in which the motor adopts brushed DC motor technology. The motor of this kind of fan includes brushes and brushes that are in contact with the rotating part of the motor, called the rotor, to transfer current to the rotating part, which creates rotation. Brushed motors can easily change direction because the polarity of the current can be reversed, allowing the fan to rotate forward or reverse. The speed of the brushed motor can be precisely controlled by adjusting the current intensity, which allows the speed of the fan to be adjusted within a certain range.
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2024.11
1. Basic Principle of DC Brushless MotorThe DC brushless motor is the core component of the DC brushless centrifugal fan. Compared with the traditional DC brushed motor, the brushless motor has higher efficiency, lower noise and longer service life. Its basic principle is as follows:Structural composition: The DC brushless motor is mainly composed of the motor body and the driver. The motor body includes a rotor made of permanent magnetic material, a stator with coil windings and a position sensor. The driver is responsible for receiving the control signal and controlling the operation of the motor according to the signal.Working Principle: When the motor is powered on, the current in the stator coil generates a magnetic field. This magnetic field interacts with the permanent magnets in the rotor to generate torque, causing the rotor to start rotating. In order to keep the rotor rotating continuously, it is necessary to continuously change the direction of the current in the stator coil, that is, to perform phase commutation. This process is usually completed by an electronic commutator, which accurately controls the timing and sequence of phase commutation according to the rotor position information provided by the position sensor. 2. Working Principle of Centrifugal FanA centrifugal fan is a device that uses centrifugal force to throw gas from the center to the periphery. Its working principle is based on the Bernoulli equation and the principle of conservation of momentum in fluid mechanics. When the fan blades rotate, the blades do work on the gas, increasing the pressure and speed of the gas. The gas is thrown to the periphery under the action of the blades to form an airflow. At the same time, due to the negative pressure area caused by the outflow of gas, the external gas will automatically replenish to form a continuous airflow. 3. Working Principle of DC Brushless Centrifugal FansCombining a DC brushless motor with a centrifugal fan constitutes a DC brushless centrifugal fan. Its working principle combines the electromagnetic drive of the DC brushless motor and the airflow generation of the centrifugal fan.Start and accelerate: When the power is turned on, the driver receives the start signal and begins to control the current in the stator coil. Initially, the current is small, the magnetic field generated is weak, and the rotor begins to rotate slowly. As the current gradually increases, the magnetic field increases, and the rotor rotates faster. At the same time, the driver continuously adjusts the timing and sequence of phase change according to the feedback signal of the position sensor to keep the rotor rotating smoothly.Airflow generation: As the rotor rotates, the centrifugal fan blades also begin to rotate. The blades do work on the gas, increasing the pressure and speed of the gas. The gas is thrown to the periphery under the action of the blades, forming a high-speed airflow. At the same time, due to the negative pressure area caused by the outflow of gas, the external gas will automatically fill in to form a continuous airflow. In this process, the kinetic energy of the gas is converted into potential energy, realizing the transportation and heat dissipation of the gas.Speed regulation: In order to meet the needs of different occasions, DC brushless centrifugal fans usually have speed regulation functions. This can be achieved by changing the voltage or current supplied to the motor. When the voltage or current changes, the magnetic field strength in the stator coil will also change, affecting the speed of the rotor. By accurately controlling the voltage or current, the fan speed can be accurately adjusted.Protection and monitoring: In order to ensure the safe and stable operation of the fan, DC brushless centrifugal fans are usually equipped with protection and monitoring functions. For example, overheating protection can prevent the motor from being damaged due to overheating; overcurrent protection can prevent excessive current from causing a short circuit in the circuit; and speed monitoring can monitor the fan speed in real time to ensure that it operates within the set range. IV. Application and AdvantagesDC brushless centrifugal fans have been widely used in various fields due to their advantages such as high efficiency, energy saving, low noise and long life. For example, in the computer field, it is used for CPU cooling fans and chassis fans; in the field of industrial automation, it is used for heat dissipation and gas delivery of various equipment; in the field of new energy vehicles, it is used for heat dissipation of battery packs and gas delivery of air conditioning systems, etc.
2024.11
1. Regular inspection and cleaningDuring long-term operation, DC brushless centrifugal fans may be affected by the accumulation of dust, dirt or other impurities in the air, which may affect their normal operation. Therefore, regular cleaning of the fan is the key to ensuring its efficient operation. Cleaning the fan blades: The fan blades are one of the core components of the fan. Dust and impurities can cause the fan blades to be unbalanced, causing vibration and noise. You can use a soft brush or compressed air to gently remove dust from the fan blades. If necessary, wipe the fan blades with a non-corrosive detergent, but avoid using too wet cloth. Cleaning the motor: Dust accumulation inside the DC brushless motor may affect its heat dissipation effect and cause the motor temperature to be too high. It is recommended to use clean compressed air to blow away dust from the outside of the motor regularly, but avoid blowing air directly into the motor to avoid damaging the motor windings. Cleaning the filter: If the fan is equipped with a filter, it should be cleaned regularly. The function of the filter is to prevent external impurities from entering the fan, but over time, the filter is prone to dust accumulation. Regularly dismantle and clean the filter to keep the fan ventilated smoothly. 2. Lubrication and bearing maintenanceDuring long-term use, the bearings of DC brushless centrifugal fans may wear due to friction, resulting in increased noise, unsmooth operation or jamming. Therefore, it is very important to lubricate and maintain the bearings regularly. Lubrication method: Different types of fans use different types of bearings. Some bearings use a closed structure and do not require lubrication; while some fans require regular oiling. For bearings that require oiling, use the lubricating oil or grease recommended by the manufacturer to avoid using unsuitable lubricating materials. Lubrication cycle: The lubrication cycle should be determined according to the use environment and load conditions of the fan. Generally speaking, the lubrication cycle should be appropriately shortened for fans used in high-load or high-temperature environments. The specific lubrication cycle can be determined according to the fan manual. Bearing inspection: Regularly check the bearings for abnormal noise or vibration. If the bearing is severely worn or damaged, it should be replaced in time to avoid affecting the normal operation of the fan. 3. Electrical system inspectionDC brushless centrifugal fans are usually equipped with electronic controllers, sensors and power supply systems. These electrical components may cause fan failure due to aging, damage or current fluctuations. Therefore, the inspection and maintenance of the electrical system is also crucial. Check the power supply and wiring: Regularly check whether the power supply voltage is stable to ensure that the fan can work normally at the rated voltage. Check whether the wiring is loose or worn to avoid poor contact that causes the fan to fail to start or excessive current. Check the motor controller: The controller of the DC brushless fan is responsible for regulating the speed and operating status of the motor. Failure of the controller may cause the fan to work abnormally. Regularly check the working status of the controller, including whether there is overheating, abnormal sound or alarm indication, and repair or replace it in time. Battery maintenance: If the fan is equipped with a built-in battery (such as some emergency fans or DC fans in mobile devices), it is necessary to regularly check the battery power and status to avoid battery aging or leakage affecting the normal operation of the equipment. 4. Check the balance and vibration of the fanThe balance of the fan directly affects the stability of its operation. If the blades are worn or damaged, it may cause the fan to run unbalanced, resulting in unnecessary vibration and noise, and even damage to other components. Therefore, it is crucial to keep the fan balanced. Balance the blades: Check whether the blades are worn, cracked or deformed. If the blades are found to be damaged, they should be replaced in time. When replacing, make sure that the weight and shape of the new blades match the original blades to maintain the balance of the fan. Bearing and installation inspection: The vibration of the fan may also be related to the looseness of the bearings and mounting parts. Regularly check whether the bearings are intact and ensure that all mounting screws and connectors are firmly tightened to avoid vibration caused by looseness. Use vibration detection tools: For some equipment with high precision requirements, the use of vibration detection tools can more accurately determine the balance of the fan. If the vibration is too large, it should be adjusted or repaired in time. 5. Prevent overheating Overheating is one of the common causes of failure of DC brushless centrifugal fans. Long-term high-load operation, high ambient temperature or poor cooling system may cause the motor temperature to be too high, affecting the performance of the fan and even causing damage. Ensure good ventilation and heat dissipation: Make sure that the fan's heat dissipation holes and air inlets are unobstructed. Regularly check the environment around the fan to avoid accumulation blocking the fan's heat dissipation channel. Reduce load operation: Try to avoid the fan running under overload for a long time. If the fan is often under high load, it may cause the motor temperature to be too high. The workload should be reasonably arranged according to the design parameters of the fan. Use temperature control device: Some high-end DC brushless centrifugal fans are equipped with temperature control devices that can automatically monitor the temperature and adjust the fan speed. Regularly check whether the temperature control system is working properly and ensure that the temperature is not too high. 6. Regularly detect and replace faulty partsWith the extension of the use time, some parts of the DC brushless centrifugal fan may age or be damaged. Regularly detecting and replacing faulty parts can effectively prevent sudden failures. Motor winding inspection: Regularly check whether the motor winding is aging, burning, etc. If the motor performance is found to be degraded or faulty, it should be repaired or replaced in time. Capacitor inspection: If the capacitor of the fan motor fails, the motor may not start normally. Check the working status of the capacitor regularly to ensure that it is within the normal working range. Replace wear parts: For example, bearings, fan blades, controllers and other parts will have certain wear after long-term use. If wear parts are found, they should be replaced in time.
2024.11
1. Application background and requirementsWith the advancement of science and technology and the improvement of people's living standards, household appliances are gradually developing towards intelligence, efficiency and energy saving. In this context, the heat dissipation problem of household appliances has become increasingly prominent. Traditional heat dissipation methods, such as natural heat dissipation or the use of brushed fans, can no longer meet the requirements of modern household appliances for heat dissipation performance, noise control and service life. Therefore, DC Brushless Centrifugal Fans have gradually become the preferred solution in the field of heat dissipation of household appliances with their unique advantages. 2. Specific applicationsAir conditioningHeat dissipation effect: In air conditioning, DC Brushless Centrifugal Fans are mainly used in the heat dissipation system of outdoor units. They generate strong airflow through high-speed rotation, quickly discharge the heat inside the outdoor unit, and ensure the stable operation of the air conditioning system.Noise control: Due to the use of DC brushless motors, DC Brushless Centrifugal Fans generate extremely low noise during operation and will not interfere with users' daily lives.Energy saving and environmental protection: Compared with traditional brushed fans, DC Brushless Centrifugal Fans have a higher energy efficiency ratio, which can significantly reduce the energy consumption of air conditioners and meet the energy-saving and environmental protection requirements of modern household appliances.RefrigeratorCondenser heat dissipation: In the condenser of the refrigerator, DC Brushless Centrifugal Fans help the condenser dissipate heat by generating a stable airflow to ensure the temperature inside the refrigerator is stable.Noise optimization: As a common device in household appliances, the noise level of refrigerators directly affects the user experience. The low noise characteristics of DC Brushless Centrifugal Fans make the refrigerator quieter during operation.Long life: Due to the use of brushless motors, DC Brushless Centrifugal Fans have a longer service life and reduce the maintenance costs of refrigerators caused by cooling fan failures.Washing machineMotor heat dissipation: In the motor part of the washing machine, DC Brushless Centrifugal Fans help the motor dissipate heat by generating airflow to prevent motor failures caused by overheating.Noise and vibration control: The washing machine will generate certain noise and vibration during operation. The low noise and low vibration characteristics of DC Brushless Centrifugal Fans help reduce the noise and vibration of the washing machine and improve the user's comfort.Energy efficiency improvement: By optimizing the heat dissipation system, DC Brushless Centrifugal Fans can ensure that the washing machine can operate efficiently while reducing energy consumption and improving energy efficiency.Water heaterHeat dissipation of heating elements: In the heating element part of the water heater, DC Brushless Centrifugal Fans help the heating element dissipate heat by generating airflow to ensure the stable operation of the water heater.Safety performance: As a high-power device in household appliances, the safety performance of water heaters is crucial. The stable operation of DC Brushless Centrifugal Fans helps reduce safety hazards caused by poor heat dissipation.Energy saving and environmental protection: By improving the heat dissipation efficiency, DC Brushless Centrifugal Fans can reduce the energy consumption of water heaters, which meets the energy-saving and environmental protection requirements of modern household appliances. III. Technical advantages and future prospectsThe application of DC Brushless Centrifugal Fans in the field of household appliances not only meets the requirements of modern household appliances for heat dissipation performance, noise control and service life, but also brings significant energy-saving and environmental protection benefits. In the future, with the continuous advancement of technology and further reduction of costs, DC Brushless Centrifugal Fans will be more widely used in the field of household appliances. With the advancement of material science and manufacturing technology, the performance of DC Brushless Centrifugal Fans will be further improved, such as increasing the speed, reducing noise, and enhancing heat dissipation. This will enable household appliances to achieve greater improvements in heat dissipation performance while reducing energy consumption and noise levels. With the popularization of smart home and Internet of Things technology, DC Brushless Centrifugal Fans will be more integrated into smart home systems to achieve functions such as remote monitoring and intelligent adjustment. This will bring users a more convenient and comfortable use experience while improving the intelligence level of household appliances.
2024.10
Environmental protection and sustainability in designDuring the design stage, DC Brushless Centrifugal Fans have fully considered environmental protection and sustainability requirements. Energy efficient designDC Brushless Centrifugal Fans use brushless DC motors, which are more energy efficient than traditional AC motors. By optimizing the motor structure and driving method, such as adopting advanced magnetic circuit design and precise control system, energy consumption can be significantly reduced and the operating efficiency of the fan can be improved. At the same time, by improving the aerodynamic performance, such as optimizing parameters such as blade shape, angle and number, the aerodynamic loss is reduced and the energy efficiency level of the fan is further improved. Intelligent controlThe application of intelligent control technology is a highlight in the design of DC Brushless Centrifugal Fans. Equipped with an intelligent control system, the fan can automatically adjust the wind speed and power according to actual needs to ensure that it is always in optimal operating condition. This flexible control method not only improves system efficiency, but also extends the service life of equipment and reduces energy consumption and emissions caused by overuse or improper use. Low noise designNoise pollution is one of the problems that cannot be ignored in modern society. DC Brushless Centrifugal Fans significantly reduce operating noise through brushless design and optimized air duct structure. This low-noise design not only provides employees and residents with a quieter working and living environment, but also reduces the impact of noise pollution on the ecological environment. Environmentally friendly material selectionDuring the design and manufacturing process, DC Brushless Centrifugal Fans use materials that meet environmental standards, such as recyclable materials or low environmental impact materials. The use of these materials not only reduces waste emissions during the production process, but also reduces the environmental impact of the product's entire life cycle. Environmental protection and sustainability in the production processIn addition to design considerations, DC Brushless Centrifugal Fans also fully embody the concepts of environmental protection and sustainability during the production process. cleaner productionClean production is an important principle in the production process of brushless DC centrifugal fans. Reduce the emission of waste water, waste gas and solid waste by adopting advanced production processes and equipment. At the same time, we will strengthen environmental monitoring and management during the production process to ensure that the negative impact of production activities on the environment is minimized. Resource recyclingResource recycling is an important way to achieve sustainability in the production process of brushless DC centrifugal fans. Classify, process, recycle and reuse waste materials and waste generated during the production process. For example, used motors are dismantled and recycled, and valuable materials are extracted for use in the manufacture of new products. This recycling method not only reduces resource waste, but also reduces production costs and environmental pressure. Green supply chain managementGreen supply chain management is the key to achieving environmental protection and sustainability in the production process of brushless DC centrifugal fans. Choose suppliers with environmental awareness and sustainable development capabilities to ensure that every link in the supply chain meets environmental protection requirements. At the same time, we establish long-term cooperative relationships with suppliers to jointly promote the development and improvement of green supply chains. Use of energy-saving equipmentIn the production process, brushless DC centrifugal fan manufacturers actively adopt energy-saving equipment, such as LED lighting, high-efficiency equipment, etc. The use of these equipment not only reduces energy consumption during the production process, but also improves production efficiency and product quality. Promote the green development of the industryThe environmental protection and sustainability concepts embodied in the design and production process of DC Brushless Centrifugal Fans not only help reduce energy consumption and emissions, alleviate environmental pressure, but also promote the green development of the fan manufacturing industry. Through continuous technological innovation and optimized design, brushless DC centrifugal fans have become one of the mainstream products in the market. At the same time, the wide application of these products has also promoted the development and transformation of related industries, and promoted the development of the entire fan manufacturing industry in a greener and more environmentally friendly direction.
Zhejiang Nicety Electric Machinery Co., Ltd. specializes in the production of four series of products: condenser electronic fan, radiator (water tank) fan, blower, and air conditioner assembly. Professional production American, European, Japanese, Korean And Domestic brand DC automotive axial fans.
Email: [email protected] / [email protected]
Tel: +86-0578-7125439 / +86 181 0658 9231
Address：No. 98, Guangda Street, Jinsha Industrial Zone, Longquan City, Zhejiang Province, China
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