Air conditioner filter element and vehicle air conditioner filter

Abstract

The utility model provides a kind of air conditioner filter element and air conditioner filter for vehicle, the air conditioner filter element includes frame and filter assembly, frame includes frame body and elastic pad, frame body outside is equipped with accommodating groove, and elastic pad is located in accommodating groove, and filter cavity is formed in the frame body inside limit. Filter assembly is installed in filter cavity, filter layer includes plastic grid layer, HEPA filter layer and activated carbon filter layer, HEPA filter layer is located between plastic grid layer and activated carbon filter layer, HEPA filter layer adopts S-shaped folding arrangement, and flow guide cavity is equipped between plastic grid layer and HEPA filter layer, and the width of flow guide cavity is 1 to 3 millimeters. The utility model can realize multistage efficient filtration to air, with good filtering effect, long service life, strong installation adaptability and other advantages.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning filter technology, specifically to an air conditioning filter and an automotive air conditioning filter. Background Technology

[0002] Cars have become an indispensable means of transportation for people's daily travel. The car's air conditioning system plays a key role in creating a comfortable and healthy driving environment, and the air conditioning filter, as its core component, is responsible for filtering the air entering the car and intercepting dust and other particulate matter to improve air quality. In related technologies, air conditioning filters generally use non-woven fabric as the filter material. Although it has a certain filtering performance, it cannot effectively filter odors, and the overall filtering effect is not good. Utility Model Content

[0003] This invention is based on the inventor's discovery and understanding of the following facts and problems: In related technologies, current automotive air conditioning filters generally use non-woven fabric as the core filter material. Non-woven fabric, with its fibrous structure, can effectively filter larger particles in the air (such as dust and pollen). However, with the diversification of usage scenarios and the increasing complexity of pollutants, existing air conditioning filters using non-woven fabric as the filter material have gradually revealed significant performance limitations: On the one hand, the fiber gaps in non-woven fabric are relatively simple, resulting in limited interception efficiency for smaller ultrafine particles (such as PM2.5), making it difficult to meet the air purification needs of environments such as urban smog and industrial dust; on the other hand, the material itself does not have the ability to adsorb or decompose odor molecules (such as sulfides in vehicle exhaust and volatile organic compounds in the external environment). When outside air carries odors, the filter cannot effectively filter them, causing the odors to directly enter the vehicle cabin, seriously affecting driving comfort.

[0004] In addition, some non-woven fabric materials are prone to reduced breathability due to dust accumulation after long-term use. This not only increases the operating load of the air conditioning system, but may also breed microorganisms such as mold, which will cause secondary pollution to the air inside the vehicle.

[0005] Therefore, this utility model provides an air conditioning filter element and an automotive air conditioning filter, which can achieve multi-stage high-efficiency filtration of air and has the advantages of good filtration effect, long service life and strong installation adaptability.

[0006] The air conditioning filter element provided by this utility model includes a frame and a filter assembly. The frame includes a frame body and an elastic pad. A receiving groove is provided on the outer side of the frame body, and the elastic pad is disposed in the receiving groove. A filter cavity is defined within the frame body. The filter assembly is installed in the filter cavity. The filter assembly includes a plastic mesh layer, a HEPA (High-Efficiency Particulate Air) filter layer, and an activated carbon filter layer. The HEPA filter layer is disposed between the plastic mesh layer and the activated carbon filter layer. The HEPA filter layer is arranged in an S-shaped fold. A flow guide cavity is provided between the plastic mesh layer and the HEPA filter layer. The width of the flow guide cavity is set to 1 to 3 mm.

[0007] In summary, the air conditioning filter provided by this utility model achieves multi-stage high-efficiency filtration of air through a reasonable frame design and a highly efficient multi-layer filtration structure. It has advantages such as good filtration effect, long service life, and strong installation adaptability. It can effectively filter the air in the environment where the air conditioner is located, providing users with cleaner air.

[0008] In some embodiments, the plastic mesh layer is made of polypropylene injection molding material or metal material, and the mesh size of the plastic mesh layer is 15 to 25 mesh.

[0009] In some embodiments, the plastic mesh layer has diamond-shaped holes, the short diagonal length of which is set to 5 to 8 mm, and the long diagonal length of which is set to 9 to 12 mm.

[0010] In some embodiments, the activated carbon filter layer comprises a plurality of carbon beads, the spacing between two adjacent carbon beads is 0.1 to 0.3 mm, and at least some of the carbon beads have a particle size of 6 to 12 mesh.

[0011] In some embodiments, the activated carbon filter layer includes a honeycomb plate and activated carbon deposited within the honeycomb plate, the honeycomb plate being made of polypropylene material.

[0012] In some embodiments, the honeycomb panel includes a frame, a first screen and a second screen, the frame having a plurality of receiving cavities for installing activated carbon, and the first screen and the second screen being disposed on opposite sides of the frame to seal the receiving cavities.

[0013] In some embodiments, the receiving cavity is circular, and the activated carbon comprises irregularly shaped carbon beads.

[0014] In some embodiments, the elastic pad includes foam with a compression ratio of 30% to 50% and a surface with an anti-slip texture.

[0015] In some embodiments, the air conditioning filter element further includes a handle, which is located on the outside of the frame. The handle is made of polyester material and has an anti-slip texture on its surface.

[0016] Furthermore, the vehicle air conditioning filter provided by this utility model includes the air conditioning filter element provided in any of the above embodiments. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a three-dimensional schematic diagram of an air conditioning filter element provided in an embodiment of the present invention.

[0019] Figure 2 This is a front view structural diagram of an air conditioning filter element provided in an embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of an air conditioning filter element provided in one embodiment of the present invention.

[0021] Figure 4 This is an exploded view of the filter assembly in an air conditioning filter element provided in one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the activated carbon filter layer in an air conditioning filter element provided in an embodiment of this utility model.

[0023] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0024] Figure label:

[0025] 10. Border; 11. Frame; 111. Receiving slot;

[0026] 12. Elastic pad; 20. Filter assembly; 21. Plastic mesh layer; 211. Diamond-shaped pores; 22. HEPA filter layer; 23. Activated carbon filter layer; 24. Flow guide cavity; 25. Honeycomb panel; 251. Frame; 252. First screen; 253. Second screen; 254. Receiving cavity; 26. Activated carbon;

[0027] 30. Handle. Detailed Implementation

[0028] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1 to 6 As shown, this utility model provides an air conditioning filter element, which includes a frame 10 and a filter assembly 20. The frame 10 includes a frame body 11 and an elastic pad 12. A receiving groove 111 is provided on the outer side of the frame body 11, and the elastic pad 12 is disposed in the receiving groove 111. A filter cavity is defined within the frame body 11. The filter assembly 20 is installed in the filter cavity. The filter assembly 20 includes a plastic mesh layer 21, a HEPA (High-Efficiency Particulate Air) filter layer and an activated carbon filter layer 23. The HEPA filter layer 22 is disposed between the plastic mesh layer 21 and the activated carbon filter layer 23. The HEPA filter layer is arranged in an S-shaped fold. A guide cavity 24 is provided between the plastic mesh layer 21 and the HEPA filter layer 22. The width of the guide cavity 24 is set to 1 to 3 mm, for example, 1 mm, 2 mm, 2.4 mm or 3 mm.

[0030] Specifically, the frame 11 serves as the supporting structure for the entire air conditioning filter. Its outer side is provided with a receiving groove 111 that matches the elastic pad 12, allowing the elastic pad 12 to be securely placed within the receiving groove 111. The elastic pad 12 not only increases the product's adaptability during installation, accommodating more installation positions, but also acts as a buffer and shock absorber, effectively reducing the impact of vibrations generated during air conditioning operation on the filter. This prevents the internal structure of the filter from loosening or being damaged due to vibration, thereby extending the filter's service life.

[0031] At the same time, the elastic pad 12 can also fill the tiny gap between the frame 11 and the air conditioning equipment installation part, forming a good sealing effect, preventing unfiltered air from bypassing the filter element and directly entering the air conditioning system through the gap, ensuring that all air entering the air conditioner can be effectively filtered by the filter element, and improving the quality and efficiency of air filtration.

[0032] The filter assembly 20 employs three layers of filter with different functions arranged sequentially to achieve better filtration. The plastic mesh layer 21 increases the rigidity of the structure, making the overall structure less prone to deformation and supporting high airflow velocity; at the same time, it also has a pre-filtration function, preventing large foreign objects (such as leaves, cotton wool, and feathers) from entering the air conditioner and affecting its normal operation.

[0033] The HEPA filter layer 22 employs an S-shaped folded arrangement, a unique folding method that significantly increases the filtration area of ​​the HEPA filter layer 22. Compared to a flat filter layer design, within the same spatial dimensions, the S-shaped folded arrangement of the HEPA filter layer 22 can provide several times or even tens of times the filtration area, thereby significantly improving the filtration efficiency for fine particulate matter in the air. Experimental research by the inventors has shown that using an air conditioning filter element with the HEPA filter layer 22 can improve the filtration efficiency to 99.96%, resulting in a more efficient filtration effect.

[0034] Furthermore, a guide cavity 24 is provided between the plastic mesh layer 21 and the HEPA filter layer 22, which can guide air to flow through the filter assembly 20 in a more uniform and stable manner. Actual testing shows that the guide cavity 24 can improve airflow uniformity by approximately 40%.

[0035] When air enters the air conditioning filter, it first passes through the plastic mesh layer 21 for initial dispersion and guidance, and then enters the flow guide cavity 24. Within the flow guide cavity 24, the airflow direction and speed are further adjusted and optimized, allowing the air to be more evenly distributed throughout the HEPA filter layer 22. This prevents air from concentrating in localized areas and causing excessive local filtration load on the HEPA filter layer 22. This not only improves the overall filtration effect of the filter assembly 20 but also extends the service life of the HEPA filter layer 22 and reduces operating costs. After being deeply filtered by the HEPA filter layer 22, the air then enters the activated carbon filter layer 23. The activated carbon filter layer 23, with its strong adsorption capacity, further adsorbs odors, harmful gases, and chemicals such as formaldehyde, benzene, and ammonia from the air.

[0036] In summary, the air conditioning filter provided by this utility model achieves multi-stage high-efficiency filtration of air through a reasonable frame design and a high-efficiency multi-layer filtration structure. It has the advantages of good filtration effect, long service life, and strong installation adaptability. It can effectively filter the air in the environment where the air conditioner is located and provide users with cleaner air.

[0037] like Figure 2 , Figure 4As shown, in some embodiments, the plastic mesh layer 21 is made of polypropylene injection molding material or metal material, and the mesh size of the plastic mesh layer 21 is set to 15 to 25 meshes, such as 15 mesh, 18 mesh, 20 mesh, or 25 mesh. The mesh size refers to the number of sieve openings per square inch, which directly affects the filtration accuracy and airflow of the plastic mesh layer 21. When the mesh size is small, such as 15 mesh, the sieve openings are relatively large, resulting in a larger airflow and ensuring smooth airflow through the plastic mesh layer 21. However, the filtration accuracy is relatively low, only blocking larger foreign objects. When the mesh size is large, such as 20 mesh, the sieve openings are relatively small, resulting in a higher filtration accuracy and blocking smaller foreign objects from entering the air conditioner. However, the airflow will decrease accordingly. Therefore, setting the mesh size within the range of 15 to 25 mesh represents a balance between filtration accuracy and airflow achieved by the inventors through experimental research, effectively blocking large foreign objects while ensuring the normal operation of the air conditioning system.

[0038] Furthermore, the plastic mesh layer 21 has rhomboid holes 211, the short diagonal length of which is set to 5 to 8 mm, for example, 5 mm, 6 mm or 8 mm, and the long diagonal length of which is set to 9 to 12 mm, for example, 9 mm, 10 mm or 12 mm.

[0039] The four sides of the rhomboid hole 211 can form multiple interception points, which can more effectively intercept particles of different shapes and sizes compared to the single interception edge of a circular hole. Furthermore, the structure of the rhomboid hole 211 allows the stress to be distributed more evenly around the hole when the material is subjected to external forces, reducing local stress concentration and thus improving the strength and stability of the entire structure and extending its service life.

[0040] In this embodiment, the plastic mesh layer 21 is made of a metal material, such as stainless steel. The mesh count of the plastic mesh layer 21 is set to 20 meshes, the short diagonal length of the rhombus holes 211 is set to 8 mm, and the long diagonal length of the rhombus holes 211 is set to 12 mm.

[0041] It should be noted that when the plastic mesh layer 21 is made of polypropylene, the thickness of the plastic mesh layer 21 is greater than or equal to 0.5 mm, which can improve the structural strength and stability of the overall structure, and improve the service life and reliability of filtration performance.

[0042] In some embodiments, the activated carbon filter layer 23 includes a plurality of carbon beads, the spacing between two adjacent carbon beads is set to 0.1 to 0.3 mm, and at least some of the carbon beads have a particle size of 6 to 12 mesh, which has been verified by the inventors through a large number of experiments and practical applications.

[0043] When the spacing is between 0.1 and 0.3 mm, the carbon beads form a tight and reasonable arrangement, allowing air or fluid to fully contact the surface of the carbon beads as it passes through the activated carbon filter layer 23. Simultaneously, this ensures a more tortuous flow path for the fluid within the filter layer, increasing the contact time and area with the carbon beads, thereby significantly improving adsorption efficiency. If the spacing between the carbon beads is too small, although the adsorption effect may be further improved, it will lead to excessive resistance when air or fluid passes through the filter layer, affecting ventilation performance and increasing the energy consumption of the equipment. Setting the spacing between 0.1 and 0.3 mm maintains relatively low ventilation resistance while ensuring good adsorption performance.

[0044] Carbon beads with a particle size of 6 to 12 mesh have a large specific surface area. Specific surface area refers to the surface area per unit mass of a substance; the larger the specific surface area of ​​activated carbon, the higher its adsorption capacity. Although larger carbon beads have a larger individual volume, they still retain a rich microporous structure, providing a large number of adsorption sites. At the same time, an appropriate particle size allows the carbon beads to form a relatively stable structure in the filter bed, which is beneficial for fully utilizing their adsorption performance.

[0045] Furthermore, the combination of carbon beads of different sizes allows for the staged filtration of pollutants of varying particle sizes. Larger carbon beads can initially intercept larger particulate impurities such as dust and pollen, providing preliminary filtration. Smaller carbon beads, on the other hand, can further adsorb tiny particles and harmful gas molecules in the air, improving filtration accuracy. Simultaneously, the particle size range of 0.5 to 1.2 mm will not significantly impact the ventilation performance of air or fluids. Air can pass through the gaps between the carbon beads relatively easily, ensuring smooth ventilation of the filter layer.

[0046] Furthermore, in other embodiments of this invention, the activated carbon filter layer 23 includes a honeycomb plate 25 and activated carbon 26 deposited within the honeycomb plate. The honeycomb plate has a unique honeycomb structure, which significantly increases the surface area per unit volume. When activated carbon is deposited inside the honeycomb plate, it is equivalent to creating more adsorption sites within a limited space, accommodating more activated carbon and thus significantly improving the adsorption capacity of the entire filter layer.

[0047] Optionally, the honeycomb panel is made of polypropylene, which has good stability. During the fabrication of the activated carbon filter layer 23, the polypropylene honeycomb panel can be immersed in activated carbon slurry, so that the activated carbon is evenly distributed within the honeycomb panel.

[0048] like Figure 5 and Figure 6As shown, in some embodiments, the honeycomb panel 25 includes a frame 251, a first screen 252 and a second screen 253. The frame 251 has a plurality of receiving cavities 254 for installing activated carbon. The first screen 252 and the second screen 253 are respectively disposed on opposite sides of the frame to seal the receiving cavities.

[0049] Furthermore, the receiving cavity 254 is circular to increase air permeability and improve filtration efficiency. Optionally, the inner diameter of the receiving cavity can be set to 11 mm. The activated carbon comprises irregularly shaped carbon beads, which avoids the carbon beads from compressing against each other, thus preventing reduced gas permeability.

[0050] like Figure 3 As shown, in some embodiments, the elastic pad 12 includes foam with a compression ratio of 30% to 50%, and the surface of the foam is provided with anti-slip texture, which is typically distributed in the form of uneven stripes, dots or grids.

[0051] Compression ratio refers to the ratio of the amount of foam compressed to its original thickness. The compression ratio of foam is precisely set between 30% and 50%. On the one hand, this avoids the compression ratio being too low, which would result in insufficient support and sealing effect, making it difficult to cope with the influence of external environments such as vibration and pressure. On the other hand, it avoids the compression ratio being too high, which would cause the foam to be in an excessively deformed state for a long time, accelerating material fatigue, shortening service life, or even losing its proper function due to elasticity failure.

[0052] Through experimental research, the inventor discovered that the density is 0.45 g / cm³. 3 When the foam is compressed to 70% of its original thickness (i.e., a compression ratio of 30%) within the receiving groove 111, the sealing pressure reaches 2 Newtons, which meets the requirements of relevant industry standards.

[0053] like Figure 1 As shown, in some embodiments, the air conditioning filter also includes a handle 30, which is located on the outside of the frame 10. The handle 30 is made of polyester material, which will not occupy the filter space inside the filter, ensuring that the filter area is not affected, and allows the user to easily hold it when disassembling or installing the filter.

[0054] Furthermore, the surface of the handle 30 is provided with anti-slip textures, which are usually distributed in the form of uneven stripes, dots or grids, which can significantly increase the friction between the handle 30 and the hand.

[0055] Based on the same inventive concept, an embodiment of this utility model also provides an automotive air conditioning filter, which includes the air conditioning filter element provided in any of the above embodiments. It should be noted that the automotive air conditioning filter provided in this application embodiment has the same implementation principle and technical effects as the aforementioned air conditioning filter element embodiments. For the sake of brevity, any parts not mentioned in the automotive air conditioning filter embodiment can be referred to the corresponding content in the aforementioned air conditioning filter element embodiments.

[0056] In the description of this utility model, it should be understood that the terms "center", "length", "width", "upper", "lower", "inner", "outer", "axial", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In this utility model, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An air conditioning filter element, characterized in that, include: The frame includes a frame body and an elastic pad. The frame body has an accommodating groove on its outer side, the elastic pad is disposed in the accommodating groove, and the frame body defines a filter cavity. A filter assembly is installed inside the filter chamber. The filter assembly includes a plastic mesh layer, a HEPA filter layer, and an activated carbon filter layer. The HEPA filter layer is disposed between the plastic mesh layer and the activated carbon filter layer. The HEPA filter layer is arranged in an S-shaped fold. A flow guide cavity is provided between the plastic mesh layer and the HEPA filter layer. The width of the flow guide cavity is set to 1 to 3 mm.

2. The air conditioning filter element according to claim 1, characterized in that, The plastic mesh layer is made of polypropylene injection molding material or metal material, and the mesh size of the plastic mesh layer is 15 to 25 mesh.

3. The air conditioning filter element according to claim 2, characterized in that, The plastic mesh layer has diamond-shaped holes, with the short diagonal length of the diamond-shaped holes set to 5 to 8 mm and the long diagonal length of the diamond-shaped holes set to 9 to 12 mm.

4. The air conditioning filter element according to claim 1, characterized in that, The activated carbon filter layer comprises a plurality of carbon beads, the spacing between two adjacent carbon beads is 0.1 to 0.3 mm, and at least some of the carbon beads have a particle size of 6 to 12 mesh.

5. The air conditioning filter element according to claim 1, characterized in that, The activated carbon filter layer includes a honeycomb plate and activated carbon deposited within the honeycomb plate, the honeycomb plate being made of polypropylene material.

6. The air conditioning filter element according to claim 5, characterized in that, The honeycomb panel includes a frame, a first screen and a second screen. The frame has multiple cavities for storing activated carbon. The first screen and the second screen are respectively located on opposite sides of the frame to seal the cavities.

7. The air conditioning filter element according to claim 6, characterized in that, The cavity is circular, and the activated carbon comprises irregularly shaped carbon beads.

8. The air conditioning filter element according to claim 1, characterized in that, The elastic pad includes foam with a compression ratio of 30% to 50% and the surface of the foam has an anti-slip texture.

9. The air conditioning filter element according to claim 1, characterized in that, The air conditioning filter also includes a handle, which is located on the outside of the frame. The handle is made of polyester material and has an anti-slip texture on its surface.

10. A vehicle air conditioning filter, characterized in that, The air conditioning filter element includes any one of claims 1 to 9.

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