[Vacuum Cleaner] The principle of vacuum cleaner how about a small vacuum cleaner
Introduction to vacuum cleaners
Electric vacuum cleaners have been For 100 years, it’s become an indispensable household device for many, and it’s easy to see why. The current controls the operation of the motor. A fan is attached to the motor, and the fan blades are angled, like the propeller of an airplane. When the fan blades turn, they push air all the way to the exhaust. As air particles are pushed forward, the density of particles in front of the fan increases and the air pressure increases accordingly, while the density of particles behind the fan decreases. The pressure drop created behind the fan is the same as the pressure drop created in the straw when you sip on a drink. The pressure behind the fan is lower than the pressure outside the vacuum cleaner, which is ambient air pressure. This creates suction, a partial vacuum, inside the vacuum cleaner.
How vacuum cleaners work
Vacuum cleaners look complicated, but traditional vacuum cleaners are actually made up of just 6 basic parts:
An air intake, which may contain cleaning accessories
An exhaust port
An electric motor
A fan
A perforated dust bag
A housing that houses all the other components
Plug the vacuum in, turn it on, and the following happens:
The current controls the motor to run. A fan is attached to the motor, and the fan blades are angled, like the propeller of an airplane.
When the fan blades turn, they push air all the way to the exhaust.
As air particles are pushed forward, the density of particles in front of the fan increases and the air pressure increases accordingly, while the density of particles behind the fan decreases.
The pressure drop created behind the fan is like the pressure drop created in the straw when you sip on a drink. The pressure behind the fan is lower than the pressure outside the vacuum cleaner, which is ambient air pressure. This creates suction, a partial vacuum, inside the vacuum cleaner. Therefore, the air outside the vacuum cleaner automatically enters the vacuum cleaner through the air inlet.
The suction power of the vacuum cleaner
The strength of the suction depends on the following factors:
1. The power of the fan: The higher the engine speed, the stronger the suction produced.
2. Resistance of the air passage: If a large amount of debris accumulates in the dust bag, the resistance encountered by the air when it is discharged will increase. The increased resistance makes each air particle move more slowly. That’s why the vacuum cleaner works better when you’ve just replaced the dust bag.
3. The size of the opening at the end of the air inlet: Since the speed of the vacuum cleaner fan is constant, the amount of air passing through the vacuum cleaner per unit time is constant. Regardless of the size of the air intake, the same amount of air enters the vacuum cleaner every second. If the size of the air inlet is smaller, each air particle will move faster. According to Bernoulli’s principle, an increase in air velocity results in a decrease in pressure, and the decrease in pressure increases the suction at the intake. As a result, smaller vacuum cleaner attachments can generate more suction and are able to pick up heavier dirt better than attachments with larger openings.
For heavy cleaning jobs, many people use wet and dry vacuums, which can suck in liquids and solids. Liquids can wet paper or cotton filters, so this vacuum requires a different type of dust collection system. The basic design is very simple: as the air moves through the dust collector, it passes through a larger space and becomes slower for the same reason that the air moves faster through a small attachment. The drop in velocity effectively reduces the adsorption of the air, and droplets and heavier particles fall out of the airflow and into the bucket set below. When you’re done vacuuming, simply dump out the contents of the bucket.
Vacuum cleaners are also one of the products of the development of modern technology, which brings great convenience to our lives, making it easier to do housework or work. Vacuum cleaners also have wet and dry uses. The function of the vacuum cleaner can suck in liquids and solids, which is more convenient for large-scale cleaning work. Through my introduction above, I believe that everyone has a certain understanding of the working principle of the vacuum cleaner. It is not only simple in design, but also easy to use. It is really a good helper at home, I hope the above content can help everyone!
