In my opinion, Dyson vacuum cleaner adopts multi-cone cyclone dust removal technology, which replaces the dust bag (or filter screen, filter element and cotton filter) in front of the general vacuum fan and blocks most of the larger dust and debris.
However, there are still a few fine dust, dust mites and so on. This is what the multi-cone cyclone separator missed. Therefore, in order to strengthen the "filtering" effect of the vacuum cleaner, a filter screen is installed behind the dust suction fan, that is, the exhaust port.
Because the filter screen is an efficient particle filter screen, the filter holes are very small (filtering small dust and dust interlacing) to block a small part of small dust that the multi-cone cyclone does not block. Because small dust and dust are intertwined, it is not so easy to see with the naked eye. When the small dust staggers to block the airflow, it is invisible to the naked eye.
So after cleaning the filter, the suction will definitely be better. If the "high-efficiency and high-efficiency particle filter screen" is not used, the filter hole will be larger, it is not easy to block dust, and the filtering effect will be poor. Of course, it will not easily affect the suction. The so-called suction will not decrease, but it must be kept and cleaned.
Extended data:
principle of operation
The working principle of the vacuum cleaner is that the motor of the vacuum cleaner rotates at high speed, and air is sucked from the suction port, so that a certain vacuum is generated in the vacuum box, and dust passes through the floor brush and the connecting pipe.
The handle, hose and main straw enter the dust bag in the dust box, and the dust remains in the dust bag. The filtered air enters the motor through a filter screen, which is a protective barrier to prevent dust bags from entering the motor. Air entering the motor flows out through the motor. Because the carbon brush is constantly worn during the motor operation, a filter is added before the dust collector flows out.
The finer the filter material, the cleaner the air can be filtered, but the worse the air permeability, which affects the amount of air inhaled by the motor and reduces the efficiency of the vacuum cleaner. But for users, comfort and cleanliness are the main factors.
Its air permeability is low, so it is wavy to increase the air permeability area. Some of these filter materials can be washed repeatedly. Any filter material has a "lifetime", that is, the micropores of the filter material have been blocked by fine dust particles after long-term use. Therefore, the paper dust bag is an ideal disposable sanitary and convenient bag.
After bag dust removal, the fiber will become hard, which will affect the filtration effect and ventilation effect. SMS three-layer composite filter material is washable, but its air permeability is slightly lower.
References:
Baidu encyclopedia-vacuum cleaner