Air filter

A device for removing particulate impurities from the air. When piston machinery (internal combustion engine, reciprocating compressor, etc. When working, if the inhaled air contains impurities such as dust, it will aggravate the wear and tear of parts, so it is necessary to install an air filter. The air filter consists of a filter element and a shell. The key requirements of air filter are high filtration efficiency, low flow resistance and long-term continuous use without maintenance. Then, next, the car editor patiently introduced the air filter to his friends.

Knowledge introduction-introduction

Air filters are used in pneumatic machinery, internal combustion engines and other fields. Its function is to provide clean air for these mechanical equipment, prevent these mechanical equipment from inhaling air with impurity particles, and increase the probability of wear and damage. The key structure of air filter consists of filter element and shell, in which the filter element is the key filtering component and is responsible for gas filtration, while the shell is the external structure that must ensure the supply of filter element. The work of air filter needs to be able to filter air efficiently, and it can work continuously for a long time without increasing too much airflow resistance.

It is also used in the hydraulic system of hydraulic machinery to varying degrees. The key is to adjust the internal and external pressure difference of automobile fuel tank in hydraulic system.

Introduction to knowledge-how to use it

When maintaining the air filter, please carefully check the color and contrast of the filter paper on the inner and outer surfaces of the paper filter element. The outer surface of the used filter element in contact with the atmosphere is grayish black due to dust deposition; However, the inner surface layer of the filter paper facing the inlet side should still show its original color. If the dust on the outer surface of the filter element is removed, the true color of the filter paper can be revealed and the filter element can be used continuously. When the dust on the outer surface of the filter element is removed, the true color of the paper does not appear, or the inner surface of the filter paper becomes dark, the filter element must be replaced. Under normal circumstances, the manufacturer of each car and its special maintenance station basically have the recommended air filter replacement cycle (timetable), and friends just need to do it as required. If there is a lot of dust on the road surface, the time for cleaning and replacing the air filter element should be appropriately reduced. If the replacement time is good, it will be carried out in a special maintenance station. If your partner is used to buying accessories by himself, you must first find out what model and material your car's air filter is, and you must use the high-quality air filter specified by the manufacturer. Distinguish the authenticity when buying, and never use unqualified air filter in the car.

Brief introduction of knowledge recognition methods

The working principle of the air filter and when it needs maintenance or replacement can be determined by the following methods:

Theoretically, the service life and maintenance distance of the air filter should be measured according to the ratio of the gas flow through the filter element to the gas flow required by the engine. When the flow rate is greater than the flow rate, the filter works normally; When the flow is equal to the flow, the filter should be well maintained; When the flow rate is less than the flow rate, the filter can not be used further, otherwise the working condition of the engine will get worse and worse, or even it will not work.

In practice, when the air filter element is blocked by suspended particles and cannot meet the air flow required by the engine, the working state of the engine will be abnormal, such as low roar and slow acceleration (insufficient intake air leads to insufficient cylinder pressure); Unable to work (the mixture is too rich, resulting in incomplete combustion); The water temperature rises year-on-year (combustion continues when entering the exhaust stroke); During the acceleration process, the exhaust gas becomes more concentrated.

When these symptoms sometimes appear, it can be judged that the air filter is blocked, and the filter element should be removed immediately for maintenance or replacement. When maintaining the air filter, pay attention to the color change of the inner and outer layers of the filter. After dust removal, if the outer surface of the filter paper is clear and the inner surface is bright, the filter element can continue to be used. If the outer surface of the filter paper has lost its true color or the inner surface is dark, it must be replaced!

Well, there are so many empty filters today, and a friend of the car editor gave a brief introduction. I wonder if my friends know more about air filters after listening to the brief introduction of the car editor. I hope the profile of Bianxiao Automobile can help my friend. If you want to know more, pay attention to this website. Bian Xiao's car is waiting for you here!

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