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In the previous article, we introduced the principle of the vacuum cleaner. For details, please see…………Â We know that vacuum is the source of suction, but how should it be separated from the air after it has been sucked away?Â Today we talk about several dust-removing technologies for vacuum cleaners: dust bag, cyclone and water filtration.
First, the dust bag type
Dust bag dust removal technology is the easiest to understand.Â According to the principle of the vacuum cleaner, the air is mixed with dust and sucked into the body.Â Then, by placing a dust collecting device at the end of the straw, dust can be collected in the bag to isolate the dust, and the air is discharged through the fine pores of the bag.
The early dust collectors were dust bags.Â Although it was born earlier, it has still been adopted by some vacuum cleaner manufacturers, and each manufacturer will upgrade the material of the dust bag.Â The material of the early dust bag is simple in structure and can be washed and cleaned. However, it is too troublesome to say that some dust is difficult to completely remove.Â Later, the material and structure of the dust bag were constantly changing or upgrading, and a disposable dust bag was born.Â When the dust bag is full, the user can easily replace the dust bag by purchasing a new dust bag, which is convenient.Â Of course, this also leads to an increase in the cost of using the vacuum cleaner.
With the development of dust bag technology, many manufacturers (mostly Japanese manufacturers, such as Panasonic) have modified it and created a dust box type dust collection method, but in essence it is dust bag type dust, but it will only The softly collapsed dust bag was replaced with a hard dust box, and it was indeed a grade from the outside. In essence, it was a change of soup.Â Therefore, we must also remind everyone that we must pay attention to the distinction when purchasing. The dust-free bag does not mean that it is a dust-free bag.
Whether it is the dust bag type or the dust box type mentioned above, it is inevitable to face a serious problem: suction attenuation.Â As the dust in the dust bag (referred to as the dust box) gradually increases (affects the exhaust), the suction will drop, which is very troublesome.Â Today, James Dyson, the founder of British vacuum cleaner company Dyson, has purchased Hoover’s dust bag vacuum cleaner, which is also plagued by the problem of suction attenuation.Â In the end, Dyson developed a solution, which is a cyclone.
The principle of cyclone is relatively complicated, and the core principle is centrifugal force.Â Cyclone, in short, is to let the dust and air rotate at high speed, firstly remove large pieces of dust by centrifugal force (the centrifugal force is large according to the principle of centrifugal force), and then gradually separate the fine dust by changing the aperture of the filter. .Â However, the vacuum cleaners have different designs for the cyclone and dust collectors, and the effects will be different. Therefore, the schematic diagram is only for reference, depending on the manufacturer’s design.
It can be seen that whether it is a hand-held or a horizontal vacuum cleaner, the cyclone type dust collecting device is mostly in the shape of a round cup, so it is generally called a dust cup.Â So this can also be used as a feature distinguishing between traditional dust bag (dust box) vacuum cleaners and cyclonic vacuum cleaners.Â The cyclonic vacuum cleaner optimizes the problem of suction attenuation (but not the attenuation), and it is also very convenient to clean. Generally, just open the dust cup cover and dump the dust.
Third, water filtration
A brand of wet and dry (water filtration principle) vacuum cleaner
We know that ordinary household vacuum cleaners are only for dry dust, regardless of the type, and can only be discouraged for dirty liquids.Â The “large” vacuum cleaner shown above, I think most people have seen it, it is a wet and dry vacuum cleaner, using the principle of water filtration.
Water is naturally the most important dust-free â€œdeviceâ€ for such vacuum cleaners.Â When dust and air enter the body, they first pass through a large space, and the airflow speed will be slower, which is the same as the speed when the air flows through a small space.Â A decrease in speed causes the heavier dust and liquid to be peeled off and falls into the water below, thereby achieving dust separation.Â Then, use the other filters above to filter the leaked fine dust to ensure the overall filtration effect.Â Then, through the washing water and other devices, the moisture in the air is adsorbed, and finally the clean air is discharged.