Precautions when buying a vacuum cleaner

Vacuum cleaners are generally divided into three types: barrel vacuum cleaners, horizontal vacuum cleaners, and hand-held vacuum cleaners. They are used in different places. The vacuum cleaner generally uses a motor to drive the impeller to rotate at a high speed, so that a partial vacuum is formed in the dust collection chamber. The air pressure difference with the outside of the dust collecting chamber generates air flow and the dust is sucked into the dust collecting chamber together with the air flow. After filtering, the dust is retained in the dust collecting chamber and the clean air is discharged.

How to choose a good vacuum cleaner

1. The suction is strong enough. The suction unit is represented by the degree of vacuum. The greater the vacuum, the greater the suction. Generally used pa (Pa) said. It is better to use 27Kpa for home use. Too low suction is not enough. Too much is a waste. Handheld generally can reach 16Kpa. When you go to the shopping mall to buy, it is better to find a more intuitive demonstration of on-site water column suction bowling ball vacuuming.

2. Prevent secondary pollution. The inhaled dust is not effectively filtered, causing secondary pollution, which is a big invisible killer of vacuum cleaners!

(1) Look at the filter material of the exhaust air of the vacuum cleaner. *Sponge: The least filterable. *Activated carbon filter: It can increase the adsorption force of dust, but the filterability is average with larger holes. * scouring pad: the texture is more careful, it is a relatively economical material, and its performance is better than the first two. *HEPA filtration: that is, the high-precision filter has strong adsorption force and is the best filter material at present. *Composite paper dust bag: double-layer filtration effectively improves the dust filtration rate, but the disadvantage is that the cost is too high. Advantages It is convenient to use and can be thrown away when it is full of dust without cleaning.

(2) Look at the air purification and sterilization technology. Electrostatic dust capture, HEPA dust purification, activated carbon adsorption, photocatalyst (regenerates only by sunlight), cold catalyst (natural regeneration) recommended! Formaldehyde catalytic decomposition.

3. Equipped with multiple nozzles. See if the nozzle equipped with the vacuum cleaner is suitable for your cleaning needs. Of course, the more complete the equipment, the more applicable occasions.

4. Other details. Whether the material of the vacuum cleaner housing is strong and durable. Stainless steel is preferred (the disadvantage is higher price), and ABS engineering plastic is recommended to be wear-resistant, impact-resistant and not easy to age. To verify the material, you can open the upper cover of the dust collection bin, and check whether it is marked with ABS, except for fakes! Check whether there is dust on the monitor, whether it is rubber rollers to prevent scratching the floor, and whether it can be adjusted by infinitely variable speed. Whether the fuselage has anti-collision strip design to protect your furniture. If there is a dust bag, check whether the quality of the dust bag is good, and recommend non-woven materials. Now the latest vacuum cleaner technology is a bagless design. Through the principle of aerodynamics, the dust inhaled into the dust collecting bucket is thrown into the dust collecting bucket by strong centrifugal force, so as to realize the complete separation of dust and gas, and effectively solve the secondary problem. Pollution problem, the vacuuming efficiency is 25% higher than that of ordinary vacuum cleaners, strongly recommended (also known as dragon cyclone, or dust rejection technology)!

5. Misunderstandings in the purchase of vacuum cleaners

(1) Current household vacuum cleaner motors are not high-tech products, and the best motors in the world are produced in China. The use of imported motors will only increase the cost of products and increase the burden on consumers (some high-tech professional dust motors imported are still very good). On the other hand, the motor is installed in the machine, and the place of origin is not marked on the outside, so some brands advertise themselves as imported motors, which is deceiving customers. It's a simple test, do you ask the salesperson to mark the imported motor on the invoice to see if he dares?

(2) Regarding suction and noise. The correct noise reduction method is achieved through the use of relatively quiet motors for motor reform. In order to achieve the purpose of noise reduction, some vacuum cleaners on the market have to sacrifice suction and wrap several sponges on the motor to achieve the noise reduction effect. In this way, the sound is small, but on the other hand, it affects the suction (unsmooth exhaust), and also affects the heat dissipation of the motor, which causes the motor to be easily damaged. This is a completely wrong method. The national standard is 82 decibels, under the premise that no wrong noise reduction method is used. It is better if it is lower than the national standard.