With the development of the times, vacuum cleaner as a cleaning tool has been transformed from tepid sales to “assistant” of thousands of households. For more and more people, it is an essential thing to buy a vacuum cleaner. But in the face of a mixed market, how should ordinary consumers choose? What are the precautions? < / P > < p > when choosing a vacuum cleaner, you need to understand the current classification of vacuum cleaners. There are many kinds of classification methods for vacuum cleaners. According to whether the power cord needs to be plugged in, it can be divided into wired and wireless. According to the shape and function, wired vacuum cleaner can be divided into barrel vacuum cleaner, horizontal vacuum cleaner and vertical vacuum cleaner. Wireless vacuum cleaner can also be divided into push rod vacuum cleaner and hand-held vacuum cleaner. The advantages of bucket vacuum cleaner are as follows: large capacity, high power, strong dust collection ability, dry and wet dual-use; disadvantages: large volume, high power consumption, high noise; < / P > < p > horizontal vacuum cleaner, advantages: can enter low-lying area, high efficiency, low noise, large suction, flexible suction head; disadvantages: need to drag the bucket, easy to impact furniture; < / P > < p > vertical vacuum cleaner, Advantages: large suction, no need to bend, convenient switching of carpet floor brush head; disadvantages: great noise, heavy, inflexible, unable to clean corners and low places; < / P > < p > wireless vacuum cleaner, advantages: small and light, easy to store, free from the shackles of the line, can be changed to handheld mode; disadvantages: need to consider the problem of endurance, dust box capacity is small; < / P > < p > for household vacuum cleaner Wireless vacuum cleaners are more convenient to use, and wired vacuum cleaners were more popular in the early years. With the continuous improvement and development of dust collection technology, as well as the increasing demand of people in life, wireless vacuum cleaners gradually overtake wired vacuum cleaners and become the main force in household dust collection. < / P > < p > if you buy a vacuum cleaner, you can definitely know two values: suction power and rated power. Many people don’t understand the difference between these two values. If you think rated power = suction power = large suction force, you are wrong. < / P > < p > for a vacuum cleaner, the suction is provided by the vacuum motor, so the motor becomes a crucial component. Under the high-speed drive of the motor, the air inside the vacuum cleaner is rapidly discharged to form an instantaneous vacuum; under the action of external atmospheric pressure, the garbage and dust near the suction nozzle enter the vacuum cleaner with the air flow, and then discharge after being filtered by the filter, so as to complete the whole process of dust collection. Therefore, the magnitude of suction depends on the aerodynamic energy that the motor can generate, that is, the suction power, rather than the energy consumed by the motor operation, that is, the rated power. < / P > < p > the endurance is very important for the wireless vacuum cleaner. No one wants to clean until half of the machine runs out of power, and the battery life depends on the type and capacity of the vacuum cleaner. The vacuum cleaner batteries on the market are generally divided into nickel cadmium battery, nickel hydrogen battery and lithium battery. The service life of different battery types is also different. At present, only lithium battery is the first choice of many brands. Most vacuum cleaners are powered by lithium batteries, which are safe and secure. < / P > < p > in addition, some vacuum cleaners will be equipped with two batteries for the machine. The batteries can be disassembled, and the other can be charged when using one. Users can also purchase more batteries for backup according to their own needs, which is suitable for large household. < / P > < p > the ceiling can be used on the upper part, and the bed and crevice can be under the lower part. This is the convenience of the wireless vacuum cleaner. Of course, not all wireless vacuum cleaners can achieve such convenience, because different suction heads need to be replaced in different scenes to achieve the cleaning effect. Electric bed brush, sofa brush, two in one flat suction brush, top suction brush, soft brush These can be the same can not be less, especially the electric bed suction, replacement can achieve the function of the mite remover, is not to save the money of the mite remover.