Multilayer compound type filter of air conditioner air return system for vehicles

Abstract

The multi-layer composite filter for the return air system of the vehicle air conditioner disclosed by the present invention comprises a HEPA filter core, a conductive fiber layer, a high dielectric coefficient nonwoven fabric, an insulating outer frame, a DC power supply module, a transformer, an antibacterial nonwoven fabric, and activated carbon Layer and electret melt-blown non-woven fabric, the HEPA filter element is bonded from top to bottom by antibacterial non-woven fabric, activated carbon layer and electret melt-blown non-woven fabric, installed in the insulating outer frame, the The high dielectric constant non-woven fabric is arranged between two conductive fiber layers, the conductive fiber layer is fixedly connected with the insulating outer frame, and the conductive fiber layer is connected to the DC power supply module through the transformer, and the DC power supply module is connected to the power supply in the vehicle. . The present invention adds electric treatment and filtration to the traditional HEPA filter layer, so that particles of 0.1 μm to 0.3 μm that cannot be filtered in the traditional technology can be filtered, and can realize the function of low energy consumption and high-efficiency filtration of the vehicle air conditioner filter.

Description

technical field [0001] The invention relates to an air conditioner filter for automobiles, in particular to a multi-layer composite filter for the return air system of the air conditioner for automobiles. Background technique [0002] The traditional automotive air conditioning filter element is a filter-type air purification device, and its name is: HEPA, which means high-efficiency air filter. The filter screen meeting the HEPA standard has an effective rate of 99.7% for blocking particles above 0.3 μm. Its characteristic is that air can pass through, but solid particles of a certain size cannot pass through. [0003] There are misunderstandings in the traditional technology, and it is believed that the larger the volume of particles, the stronger the removal ability of HEPA, but the experimental data shows that HEPA works by relying on the van der Waals force between fine particles and solids, so it is suitable for 0.5μm and above The filtration efficiency of particles b...

AI Technical Summary

Problems solved by technology

[0004] On the other hand, traditional HEPA can only filter out larger particles, and has limited blocking effect on PM2.5

At the same time, if too high HEPA blocking effect is required, the ventilation volume will drop significantly, which cannot meet the actual use requirements

It can be seen that filtering PM2.5 particles cannot completely rely on HEPA traditional filtering methods

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