Secondary air filter

Abstract

The utility model relates to a secondary air filter which comprises an air filter upper cover and an air filter bottom shell, the air filter upper cover and the air filter bottom shell are fixedly connected, and a cavity is formed in the air filter upper cover and the air filter bottom shell; the air filter air inlet cover is arranged at the front end of the air filter upper cover; the primary air inlet assembly is arranged at the rear end of the air filter air inlet cover and located in the air filter upper cover; the secondary air inlet assembly is arranged at the rear end of the primary air inlet assembly and located in the air filter upper cover. The air filter has the advantages that air enters through the air filter air inlet cover, enters the air filter upper cover from the air filter cyclone plate, then enters the air filter bottom shell, enters the coarse-mesh sponge with engine oil through a bottom shell cavity path, is subjected to fine primary filtration and then enters the fine-mesh sponge; and the air is precisely filtered for the second time to the top layer of the upper cover to be exhausted, so that the air flow is prevented from being blocked, and the air filter assembly provides high-quality purified air for the engine.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle air intake systems, specifically to a secondary air filter. Background Technology

[0002] An air filter, short for air purification device, is a device used to remove particulate impurities from the air. In the intake system of internal combustion engines such as automobiles and motorcycles, the main function of the air filter is to filter impurities and particulate matter, such as dust, sand, and pollen, from the air entering the engine to protect the normal operation of the engine and improve combustion efficiency.

[0003] Air filters typically consist of two parts: a filter element and a housing. Their main requirements are high filtration efficiency, low flow resistance, and the ability to operate continuously for extended periods without maintenance. A qualified air filter ensures the necessary air intake for engine operation and effectively filters out foreign objects from the air, preventing them from entering the engine and causing wear.

[0004] However, in existing technologies, air filters mostly use single-stage filtration for air purification. The drawbacks of this single-stage filtration are: single-stage filtration often only removes larger particles, and is not effective at filtering smaller particles. Furthermore, because there is only one layer of filter media, the filter is easily clogged by fine particles, requiring more frequent replacement or cleaning of the filter element, increasing maintenance costs and waste generation. Moreover, single-stage filtration means that the filter element is more likely to reach saturation, resulting in a shorter lifespan. As dust and impurities accumulate in the filter, the resistance to airflow through the filter gradually increases, which affects the engine's intake air volume, thereby affecting performance and fuel efficiency. In extremely dusty environments, the filter may quickly lose its filtration efficiency and fail to provide continuous and reliable protection.

[0005] In view of this, improvements are needed to address the aforementioned deficiencies. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide a secondary air filter.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0008] A secondary air filter, comprising:

[0009] An air filter top cover and an air filter bottom shell are fixedly connected, and a chamber is formed inside them.

[0010] An air filter intake hood is provided at the front end of the air filter cover.

[0011] A primary air intake assembly is disposed at the rear end of the air filter intake shroud and located inside the air filter upper cover;

[0012] A secondary air intake assembly is disposed at the rear end of the primary air intake assembly and located inside the air filter cover;

[0013] The air outlet is located at and connected to the rear end of the air filter cover. Air is filtered through the air filter inlet hood, the primary air intake assembly, and the secondary air intake assembly before finally exiting from the air outlet.

[0014] As an improvement, the air filter intake hood has several evenly distributed drain holes at its front end, and a dust cover is provided at the front end of the drain holes. The dust cover is fixed to the front end of the air filter intake hood in an inverted L shape and blocks the drain holes.

[0015] As an improvement, the primary air intake assembly includes an air filter rotary seal plate, which is disposed at the rear end of the air filter intake hood, and the rear end of the air filter rotary seal plate has a cavity opening inside the air filter cover.

[0016] As an improvement, a water and dust leakage chamber is provided inside the air filter bottom shell, and the water and dust leakage chamber, the chamber formed by the air filter top cover and the air filter bottom shell, and the cavity are all connected.

[0017] As an improvement, the secondary air intake assembly includes a coarse-mesh sponge and a fine-mesh sponge, with the coarse-mesh sponge located below the fine-mesh sponge and both inside the chamber, and the coarse-mesh sponge being soaked in engine oil.

[0018] As an improvement, the air filter top cover and the air filter bottom shell are fastened together by an air filter insert.

[0019] As an improvement, a sponge clamping rib is fixedly connected to the top wall of the air filter cover. The sponge clamping rib is used to compress both fine-mesh and coarse-mesh sponges.

[0020] Compared to traditional technologies, the advantages of this invention are as follows: The secondary air filter proposed in this invention significantly improves filtration efficiency through a dual filtration mechanism of primary and secondary air intake components, especially for fine particles (such as PM2.5); the design of the drain outlet and dust cover enhances environmental adaptability, effectively preventing rainwater from entering and blocking large dust particles; the synergistic work of coarse and fine mesh sponges reduces the need for frequent filter replacement or cleaning due to clogging, lowering maintenance frequency and extending service life; the design of the air filter inserts and sponge clamping ribs simplifies the installation process and optimizes the fixation of the filter media, ensuring the stability and efficiency of the filter media during use. Compared to the single-stage filtration method in existing technologies, this invention improves purification efficiency and reduces maintenance costs. Attached Figure Description

[0021] Figure 1This is a top view of the present invention;

[0022] Figure 2 This is a rear view of the present invention;

[0023] Figure 3 For the present utility model Figure 2 Section in direction A Figure 1 ;

[0024] Figure 4 For the present utility model Figure 2 Section in direction A Figure 2 ;

[0025] As shown in the figure: 1. Air filter top cover; 2. Air filter bottom shell; 3. Air filter inlet hood; 4. Air outlet; 5. Drain outlet; 6. Dust cover; 7. Air filter rotary seal plate; 8. Cavity; 9. Water and dust leakage chamber; 10. Coarse mesh sponge; 11. Fine mesh sponge; 12. Air filter insert; 13. Sponge compression rib. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] Please refer to the instruction manual appendix. Figures 1-4 This utility model discloses a secondary air filter, which mainly includes an air filter cover 1, an air filter bottom shell 2, an air filter inlet hood 3, a primary air intake assembly, a secondary air intake assembly, and an air outlet 4. The air filter cover 1 and the air filter bottom shell 2 are fixedly connected and secured by air filter inserts 12. An internal chamber is formed to accommodate the aforementioned components. The air filter inlet hood 3 is located at the front end of the air filter cover 1 and has several evenly distributed drain holes 5. A dust cover 6 is located at the front end of each drain hole 5, fixed in an inverted L-shape to the front end of the air filter inlet hood 3, and obstructs the drain holes 5. Therefore, when air enters from the air filter inlet hood 3, the dust cover 6 performs preliminary filtration of dust in the air and prevents dust from accumulating on the drain holes 5.

[0029] Next, the primary air intake assembly is located at the rear end of the air filter intake hood 3 and inside the air filter top cover 1. Specifically, the primary air intake assembly includes an air filter rotary seal plate 7, which is located at the rear end of the air filter intake hood 3 and is equipped with a cyclone fan to effectively block particles and dust in the air. Then, a cavity 8 is provided at the rear end of the air filter rotary seal plate 7, which is open inside the air filter top cover 1. The cavity 8 is conical, with its front end connected to the rear of the air filter rotary seal plate 7 and its bottom end connected to the air filter bottom shell 2.

[0030] Then, a water and dust leakage chamber 9 is provided in the air filter bottom shell 2. The water and dust leakage chamber 9, the air filter top cover 1 and the air filter bottom shell 2 are connected to the cavity 8. Therefore, the air that has been filtered once by the previous air intake assembly still contains some moisture and dust. This moisture and dust travel along the path of the cavity 8 to the water and dust leakage chamber 9, where the chamber blocks and deposits the moisture and dust, allowing the air to enter the secondary air filtration process.

[0031] The secondary air filtration process relies on the secondary air intake assembly. Specifically, the secondary air intake assembly is located at the rear end of the primary air intake assembly and inside the air filter cover 1. The secondary air intake assembly includes a coarse-mesh sponge 10 and a fine-mesh sponge 11. The coarse-mesh sponge 10 is located below the fine-mesh sponge 11 and both are located inside the chamber. The two are tightly fitted together. A sponge clamping rib 13 is fixedly connected to the top wall of the air filter cover 1. The sponge clamping rib 13 is used to compress the fine-mesh sponge 11 and the coarse-mesh sponge 10 tightly. This minimizes the excess gaps between the fine-mesh sponge 11 and the coarse-mesh sponge 10. The coarse-mesh sponge 10 is soaked in engine oil, allowing the oil to better absorb dust and achieve a filtration effect. Air exits from the water and dust leakage chamber 9, undergoes micro-filtration by the coarse-mesh sponge 10 and precision filtration by the fine-mesh sponge 11, and finally reaches the top of the fine-mesh sponge 11. At this point, the air has been filtered, and the moisture and dust within it have been absorbed. The air outlet 4 is located at the rear end of the air filter cover 1 and is connected to it, ultimately entering the interior of the vehicle.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A secondary air filter, characterized by, It includes: The air filter upper cover (1) and the air filter bottom shell (2) are fixedly connected between the air filter upper cover (1) and the air filter bottom shell (2), and a cavity is formed inside; The air filter inlet cover (3) is arranged at the front end of the air filter upper cover (1); The primary air inlet assembly is arranged at the rear end of the air filter inlet cover (3) and located in the air filter upper cover (1); The secondary air inlet assembly is arranged at the rear end of the primary air inlet assembly and located in the air filter upper cover (1); The air outlet (4) is located at the rear end of the air filter upper cover (1) and communicates with the air filter upper cover (1), and the air is filtered through the air filter inlet cover (3), the primary air inlet assembly and the secondary air inlet assembly and finally discharged from the air outlet (4).

2. The secondary air filter according to claim 1, characterized by: The air filter inlet cover (3) is provided with a plurality of evenly distributed water draining holes (5) at the front end, and a dust cover (6) is arranged at the front end of the water draining hole (5), the dust cover (6) is fixed to the front end of the air filter inlet cover (3) in an inverted L shape, and the dust cover (6) forms a shielding for the water draining hole (5).

3. The secondary air filter according to claim 1, wherein: The primary air inlet assembly includes an air filter rotary sealing plate (7) arranged at the rear end of the air filter inlet cover (3), and the air filter rotary sealing plate (7) is provided with a cavity (8) in the air filter upper cover (1) at the rear end.

4. The secondary air filter according to claim 3, wherein: The air filter bottom shell (2) is provided with a water and dust leakage cavity (9), and the water and dust leakage cavity (9) communicates with the cavity formed by the air filter upper cover (1) and the air filter bottom shell (2) and the cavity (8).

5. The secondary air filter according to claim 1, wherein: The secondary air inlet assembly includes a coarse mesh sponge (10) and a fine mesh sponge (11), the coarse mesh sponge (10) is located below the fine mesh sponge (11) and both are located inside the cavity, and the coarse mesh sponge (10) is soaked in oil.

6. The secondary air filter of claim 1, wherein: The air filter upper cover (1) and the air filter bottom shell (2) are fastened by the air filter fillet (12) arranged therebetween.

7. The secondary air filter of claim 1, wherein: The sponge compression rib (13) is fixedly connected to the top wall of the air filter upper cover (1), and is used for compressing and compacting the fine mesh sponge (11) and the coarse mesh sponge (10).

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