1. The role of the motor
The motor of a vacuum cleaner is its core power source. It is usually designed with an electric motor to convert electrical energy into mechanical energy through electricity. The power of the motor is a key factor in determining the suction power of the vacuum cleaner, and the power is usually between 500W and 2000W. The greater the power, the stronger the suction power the motor can provide, so that more dust and dirt can be sucked in. When the rotor inside the motor rotates, the negative pressure generated helps to suck in air and debris. There are various types of motors, including series motors and brushless motors. Brushless motors are increasingly being used by vacuum cleaners due to their high efficiency and low noise. The speed of this motor can be automatically adjusted, and with modern control technology, it provides a more flexible cleaning mode to meet different cleaning needs. The durability and maintenance requirements of the motor are also important factors to consider when purchasing a vacuum cleaner. Choosing products with high motor quality and good brand reputation can ensure long-term stable performance.

2. Fan design
The fan plays a vital role in the vacuum cleaner and is usually divided into centrifugal fans and axial fans. Centrifugal fans draw in air and accelerate it out through their blades as they rotate, forming a strong airflow. This design not only effectively increases the air flow rate, but also generates a large negative pressure in a smaller space. Axial fans are suitable for some specific types of vacuum cleaners by pushing air along the axis of the fan. The shape of the fan, the number of blades and the angle will affect the efficiency and strength of the airflow. High-quality fans are usually made of highly wear-resistant materials and can maintain stable performance over long-term use. The noise level of the fan is also an important consideration in the design. The fans of modern vacuum cleaners are often carefully designed to reduce noise during operation and improve the user experience. Therefore, when choosing a vacuum cleaner, understanding the design characteristics of the fan will help better meet personal cleaning needs.

3. The relationship between negative pressure and suction
The working principle of the vacuum cleaner is based on the generation of negative pressure. When the motor drives the fan to rotate at high speed, it will generate an air pressure lower than the external environment inside the vacuum cleaner. This negative pressure is the power for the vacuum cleaner to suck in air and debris. Through the nozzle of the vacuum cleaner, the outside air is sucked in due to the pressure difference, carrying dust, dirt and other particles at the same time. The intensity of the negative pressure is closely related to the power of the motor, the design of the fan and the airflow path of the entire vacuum cleaner. If the airflow is obstructed, the negative pressure will be reduced, which will affect the suction. The design needs to ensure smooth airflow and avoid bottlenecks or blockages. In terms of maintenance, users should clean the filter and dust box regularly to ensure that they will not affect the smoothness of airflow. Understanding the relationship between negative pressure and suction can help users use the vacuum cleaner more effectively, choose the mode suitable for different cleaning tasks, and ensure that they can achieve the best results every time they use it.

4. The influence of overall structure
The overall design of the vacuum cleaner has an important impact on its performance. The layout of the motor and fan, the shape of the nozzle, the direction of the duct, etc. are directly related to the efficiency of air flow. Well-designed vacuum cleaners usually have a reasonable airflow path, which can reduce the resistance of air flow and increase the generation of negative pressure. For example, some high-end models use a straight-line design to shorten the connection between the motor and the fan, thereby increasing the speed and efficiency of the airflow. In addition, the design of the nozzle is also crucial. Different nozzle shapes can affect the performance of the vacuum cleaner on different surfaces. When cleaning carpets, larger nozzles can cover more area, while smaller nozzles are more flexible when cleaning tight corners. Therefore, when choosing a vacuum cleaner, understanding its overall structural design can help users find the best product for their home environment and improve cleaning efficiency.

5. Importance of maintenance
In order to ensure that the motor and fan of the vacuum cleaner remain efficient for a long time, regular maintenance and care are indispensable. Dust, debris and hair may accumulate around the fan, filter and motor, resulting in obstruction of airflow and reduced suction. Users should clean the filter and dust box regularly to ensure that they will not affect the performance of the vacuum cleaner. Check the operating status of the motor and fan to ensure that they have no abnormal sounds or vibrations. If any abnormalities are found, timely repair or replacement of parts can avoid more serious failures. Choosing a vacuum cleaner with a detachable and washable design can make maintenance work easier and more convenient. Regular maintenance can not only extend the service life of the vacuum cleaner, but also maintain the best cleaning effect, so that users can always get the ideal experience.

6. Application of modern technology
With the advancement of technology, modern vacuum cleaners are increasingly using advanced technologies, such as variable frequency motors and intelligent control systems. These technologies not only improve the energy efficiency of the motor, but also allow users to customize settings according to different cleaning tasks. The variable frequency motor can automatically adjust the speed according to the type of floor or the degree of dirt to provide the best suction. For example, when cleaning heavy carpets, the motor can automatically increase the power to enhance the suction, while when cleaning hard floors, it can reduce the power to reduce noise and energy consumption. This intelligent design not only improves the cleaning efficiency of the vacuum cleaner, but also provides users with a more convenient use experience. Some high-end vacuum cleaners are also equipped with smart sensors that can monitor the degree of dirt on the floor in real time and automatically adjust the working mode to achieve efficient cleaning. By understanding these modern technologies, users can better utilize the functions of the vacuum cleaner, optimize the cleaning effect, and adapt to different home environments.

7. Vacuum cleaner suction test
When buying a vacuum cleaner, it is very important to understand its suction test standard. Suction is usually measured in "millimeters of water column" (mmH₂O) or "Pascals" (Pa), which represent the negative pressure that the vacuum cleaner can generate under specific conditions. When purchasing, it is recommended to check the product manual or conduct on-site testing to ensure that the vacuum cleaner can meet the family's cleaning needs in actual use. At the same time, the suction power of a vacuum cleaner is not only related to the motor power and fan design, but also closely related to the compatibility of accessories and the rationality of the overall structure. When purchasing, it is recommended to choose some well-known brands, which usually provide detailed technical parameters and suction test results to help consumers make wise choices.

8. Tips for using vacuum cleaners
In order to maximize the suction power of vacuum cleaners, users should master some usage tips. For example, when cleaning carpets, moving the vacuum cleaner slowly can give the brush roller more time to loosen the dirt, thereby improving the cleaning effect. When cleaning hard floors, avoid using too high suction to avoid damaging the floor surface. It is also crucial to replace or clean the filter regularly. Clogged filters will cause a significant decrease in suction power. Users should develop the habit of regular inspection and maintenance, which can ensure that the vacuum cleaner is always in the best working condition.

9. Noise control of vacuum cleaners
Noise level is an important consideration for many users when choosing a vacuum cleaner. Modern vacuum cleaners are increasingly paying attention to noise control, reducing noise during operation by adopting silent technology and optimizing fan design. Understanding the noise level and design details of vacuum cleaners can help users choose products that suit their living environment. For example, some high-end models are equipped with noise isolation technology, which can keep the noise low when vacuuming at high power, which is especially important for families with children or pets. By choosing a vacuum cleaner with low noise design, users can ensure the comfort of the home environment while maintaining cleaning efficiency.

10. Vacuum cleaner accessories and functions
Different vacuum cleaner accessories and functional designs can also affect the suction effect. Vacuum cleaners are usually equipped with a variety of nozzles and brush heads to meet the cleaning needs of different surfaces. The rotating brush head for carpets can better loosen the dirt, while the flat nozzle for hard floors can effectively suck away the dust. Some vacuum cleaners are equipped with special accessories for cleaning hard-to-reach places such as curtains and sofas. The diversity of these accessories provides users with more cleaning options and improves the overall use value of the vacuum cleaner. Choosing a vacuum cleaner with complete accessories and powerful functions can make users more comfortable during the cleaning process and improve the hygiene level of the home environment.