What a car air filter is and how it works.

Automobile air filter is to remove particulate impurities in the air in the car, automobile air conditioning filter can effectively reduce pollutants through the heating ventilation and air conditioning system into the car, prevent the inhalation of harmful pollutants.

Introduction To Air Filter

Car air filters can bring a cleaner interior environment to cars.  Automobile air filter belongs to automotive supplies, which is composed of filter element and shell.  Its main requirements are high filtration efficiency, low flow resistance, can be used continuously for a long time without maintenance.  

The Role Of Air Filters

Automobile air filter is mainly responsible for removing particulate impurities in the air device. Piston type machinery (internal combustion engine, reciprocating compressor, etc.) work, if the inhalation of air containing dust and other impurities will aggravate the wear of parts, so it must be equipped with an air filter. Air filter is composed of two parts: filter element and shell. The main requirements of air filter are high filtration efficiency, low flow resistance and long continuous use without maintenance.

The car engine is a very precise part, and the smallest impurity will damage the engine. Therefore, before entering the cylinder, the air must be carefully filtered by the air filter before entering the cylinder. Air filter is the patron saint of the engine. The state of air filter is related to the life of the engine. If the dirty air filter is used in the car driving, it will make the engine air intake insufficient, so that the fuel combustion is not complete, resulting in unstable engine work, power decline, fuel consumption increase phenomenon. Therefore, the car must keep the air filter clean.



Classification Of Air Filters

(1) According to the working principle, there are inertia type, filter type and compound type.
(2) According to the structure, there are dry type and wet type.

Structure Of Air Filter

Air filter is generally composed of air inlet guide pipe, air filter cover, air filter shell and filter element.

Working Principle Of Air Filter

1. Dry Inertia Air Filter

Dry inertia air filter is composed of dust cover, diversion sheet, dust outlet, dust collection cup and so on. Its working principle is to make use of the suction generated by the cylinder in the intake stroke, so that the air filter inside and outside the pressure difference, the external air under the action of pressure at a higher speed into the air filter, the dust mixed in the air is thrown to the dust collecting cup, complete the air filtration.

2. Wet Inertia Air Filter

Wet inertia air filter, also known as oil bath filter, is mainly composed of central pipe, oil pool and so on. Its working principle is that the air enters the filter along the central pipe at a high speed down, plunges to the oil surface of the oil pool after the direction of movement suddenly changes to the upward, and produces rotating movement. At this time, part of the larger dust due to inertia action is too late to reverse upward with the air and is attached to the oil to complete the filtration of the air.

3. Dry Filter Type Air Filter

Dry filter type air filter is mainly composed of paper filter element and sealing gasket, its working principle is that when the air enters the filter through the paper filter element, so that the dust in the air is separated by the filter element or adhered to the filter element.

4. Wet Filter Type Air Filter

Wet filter type filter is mainly composed of metal filter mesh immersed in oil, its working principle is that the air filtered by oil bath is blocked when the fine dust particles are kept in the metal filter mesh immersed in oil, and the adhesion part of dust particles randomly drops to the oil pan.


The Function Of Air Filter

Filter out impurities or dust in the air, so that clean air into the cylinder.

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Catering to the Widest Range of Cabin Air Filter OEM Brands & Aftermarket

The cabin air filter, as an important automotive accessory, is used to filter the air entering the car's air conditioning system to protect the car's air conditioning system and passengers from dust, dirt, pollen, bacteria, and other tiny particles. With the continuous growth of the global automobile ownership, the demand for cabin air filters in the automotive aftermarket is increasing year by year.

Currently, in the field of cabin air filter materials and accessories, PLM provides a variety of mature product series and has formed a complete set of solutions. With years of technical accumulation and rich experience, we continuously provide high-quality products and services to domestic and foreign enterprises and OEM brands, gaining high recognition and praise from customers.

Step 1: Cabin Air Filter Fabric Preparation

The selection of raw materials for cabin air filter fabric is the foundation for producing high-quality cabin air filters and ensuring filtration performance.

cabin air filter fabric recommendation: There are two options, namely long-fiber non-woven fabric and activated carbon interlayer non-woven fabric. Among them, activated carbon filter fabric is especially suitable for absorbing odors and gaseous pollutants, making it the best choice for high-end models.

Step 2: Filter Fabric Pleating

The cabin air filter fabric is pleated by an automatic pleating machine, and the pleated cabin air filter fabric increases the filtration surface area, improving the filtration efficiency and dust holding capacity. Moreover, the pleated cabin air filter fabric possesses higher mechanical strength, which can better withstand the pressure generated by air flow, preventing the filter fabric from deforming or breaking during use.

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Step 3: Filter Fabric Cutting

Cabin air filter fabric cutting involves trimming large pieces of filter fabric into specific sizes to fit different types and specifications of cabin air filters. The precision of the cutting directly affects the coverage and assembly quality of the filter fabric.

Step 4: Edge Material Cutting

Edge material cutting is the process of removing excess parts generated during the filter fabric processing, ensuring that the edges of the filter fabric are neat, smooth, and meet design requirements. It also provides a better foundation for subsequent assembly, ensuring that the filter has good sealing performance and durability during use.

Step 5: Edge Bonding & Trimming

Edge bonding and trimming are generally done manually. This step ensures a tight fit between the filter element and the frame, improving overall sealing performance, making the edges look cleaner, and the dimensions more precise.

Step 6: Printing

The printing machine prints information such as brand name, model, production date, and quality mark on the frame of the cabin air filter.

Step 7: Packaging & Transportation

After packaging the cabin air filter, it is transported to the warehouse via a conveyor belt, and then waits to be shipped to the customer.

Cabin Air Filter Application

Cabin air filters are widely used in various types of automobiles to improve the air quality inside the vehicle and ensure passenger health. As consumers' attention to in-car air quality increases, the performance requirements for filters are also continuously rising. Manufacturers need to continuously innovate to develop more efficient, environmentally friendly, and easy-to-maintain filters to adapt to market changes. PLM Filter closely follows market demands and deeply engaged in the field of cabin cabin air filter materials and accessories. It not only meets the needs of manufacturers but also pays attention to the expectations of end consumers, working together with filter manufacturers to provide high-quality products. Currently, PLM Filter holds a significant position in the aftermarket.

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