An air cleaner for an automobile of a new structure

Abstract

The utility model relates to a new structure's air filter for car, including casing and install in the air filter element of casing, the casing is constituted by upper casing and lower casing, and the lower casing below air filter element is opened to have the air inlet on, and the upper casing above air filter element is opened to have the air outlet, still be provided with the prefilter screen below air filter element, the prefilter screen is silk screen gauze, the upper end surface edge of silk screen gauze is connected with the plastic frame, the plastic frame installs on the lower casing, the utility model discloses between the lower casing air inlet to air filter element increases a layer smooth and has the silk screen gauze of permeability as the prefilter screen, and the air with impurity dust enters from the lower casing air inlet, and most impurities and big particle dust contact with smooth silk screen gauze after sliding to the bottom of lower casing along the screen surface, and the dust holding capacity of filter is improved obviously, increases air filter element service life, especially suitable for the car of using in the desert and the harsh environment of more dust.

Description

Technical Field

[0001] This utility model relates to a novel automotive air filter, belonging to the field of air filters. Background Technology

[0002] Traditional automotive air filters typically consist of an upper housing, an air filter element, and a lower housing. With continuous advancements in automotive technology and the increasing diversity of vehicle operating environments, major automakers are demanding higher performance from automotive air filters. Therefore, in recent years, automakers have increased the required dust holding capacity of automotive air filters from 150g (A4 coarse ash) to 200g, with some off-road vehicles even requiring over 400g. This means that to meet the increased dust holding capacity without altering the existing air filter structure, the filter paper area of ​​the air filter element generally needs to be increased, necessitating a larger filter element size. Since the air filter is located inside the engine, where space is limited, changing the filter element size also necessitates changing the overall size of the air filter, potentially causing interference with the engine's spatial layout. Without changing the filter element size, the dust holding capacity is usually increased by replacing the filter paper with one with a high dust holding capacity or by attaching a layer of filter cotton to the air inlet surface of the filter element. However, for the requirement of doubling the dust holding capacity, simply improving the dust holding capacity performance of the filter paper or adding a layer of filter cotton is far from enough to meet the dust holding capacity performance requirements of the air filter.

[0003] Chinese utility model patent 202421319045.0 discloses a combined air filter, including a filter housing, a filter element placed inside the filter housing, and a preliminary filtration structure placed inside the filter housing and above the filter element. Although this patent uses a preliminary filtration structure to pre-filter the air entering the filter housing, reducing the frequency of filter element replacement, it still has the following shortcomings: 1. Its preliminary filtration structure uses a cone-shaped filter screen with a raised center, and the air intake structure is from top to bottom. After pre-filtration, dust falls to the lower position around the cone-shaped filter screen, and the raised center part needs to withstand greater air intake resistance; 2. Using ordinary metal mesh as the cone-shaped filter screen for the preliminary filtration structure results in a relatively low pre-filtration effect. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a new type of automotive air filter. This air filter adds a layer of smooth and highly breathable silk-screened mesh as a pre-filter inside the lower housing. The pre-filtration effect is good, and most of the filtered dust falls to the bottom of the lower housing, which greatly increases the dust holding capacity of the air filter.

[0005] The technical solution to the above-mentioned technical problems is: a new type of automotive air filter, including a housing and an air filter element installed in the housing. The housing is composed of an upper housing and a lower housing. An air inlet is opened on the lower housing below the air filter element, and an air outlet is opened on the upper housing above the air filter element. A pre-filter is also provided below the air filter element. The pre-filter is a screen-printed mesh. A plastic frame is connected to the upper edge of the screen-printed mesh, and the plastic frame is installed on the lower housing.

[0006] Furthermore, the mesh count of the screen printing yarn is 150-250 mesh.

[0007] Furthermore, the lower housing below the air filter element is provided with an inward protrusion, and the plastic frame is clamped between the air filter element and the inward protrusion of the lower housing. There is a gap between the upper surface of the screen-printed mesh and the lower surface of the air filter element.

[0008] Furthermore, the screen printing mesh is bonded to the plastic frame using hot melt adhesive.

[0009] By adopting the above technical solution, this utility model has the following beneficial effects: 1. Using screen-printed mesh as a pre-filter provides excellent pre-filtration. Screen-printed mesh, conventionally used as the core material for screen printing, features a smooth surface, low resistance, and high air permeability. This invention adds a smooth and permeable pre-filter between the air inlet of the lower housing and the air filter element. Air containing impurities and dust enters through the lower housing air inlet and first contacts the screen-printed mesh. Most impurities and large dust particles, influenced by the airflow, slide down the mesh surface to the bottom of the lower housing. Only a small portion of fine dust passes through the mesh to reach the air filter element, where over 99.5% is filtered out. Therefore, the total dust capacity of the air filter with the added screen-printed mesh pre-filter can reach approximately 200% of the previous structure, significantly improving dust holding capacity and increasing the service life of the air filter element. This is particularly suitable for automobiles used in harsh environments with high dust levels, such as deserts.

[0010] 2. This utility model adopts a bottom-up air intake structure. The dust filtered by the pre-filter falls directly onto the lower housing and does not accumulate on the pre-filter. Furthermore, by using a highly breathable screen-printed mesh as the pre-filter, the air filter resistance of this utility model only increases by about 0.5 kPa compared to conventional filters. The overall air filter assembly's intake resistance is within an acceptable range. This technical solution has been verified through prototype testing and is feasible and effective. This utility model features a simple and reasonable structural design, low manufacturing cost, low investment, and high returns.

[0011] 3. This utility model uses a high-strength plastic frame bonded to the screen printing mesh. The screen printing mesh is unfolded and flat. High-temperature resistant hot melt adhesive is evenly applied around the contact surface between the plastic frame and the screen printing mesh. Then, the plastic frame is bonded to the screen printing mesh to ensure uniform mesh tension. The lower end of the plastic frame is fixed to the inward protrusion of the lower housing located between the air inlet and the air filter element. The upper end is fixed by pressing down with the air filter element. This structural design facilitates installation and subsequent removal for cleaning and maintenance.

[0012] The technical features of the novel automotive air filter of this utility model will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 : Front view of the new structure of the automotive air filter of this utility model.

[0014] Figure 2 Top view of the novel automotive air filter of this utility model.

[0015] Figure 3 : Figure 2 CC section view.

[0016] Figure 4 : Figure 3 Enlarged view of part A.

[0017] In the diagram: 1-Upper housing, 2-Air outlet, 3-Lower housing, 31-Inward protrusion, 4-Air inlet, 5-Air filter element, 6-Plastic frame, 7-Pre-filter. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] Example 1: A novel automotive air filter, such as... Figures 1-4 As shown, the device includes a housing and an air filter 5 installed inside the housing. The housing consists of an upper housing 1 and a lower housing 3. An air inlet 4 is opened on the lower housing 3 below the air filter 5, and an air outlet 2 is opened on the upper housing 1 above the air filter 5. A pre-filter 7 is also provided below the air filter 5. The pre-filter is a 200-mesh screen printing mesh. A plastic frame 6 is connected to the upper edge of the screen printing mesh, and the plastic frame 6 is installed on the lower housing 3.

[0020] In this embodiment, the screen printing mesh is bonded to the high-strength plastic frame 6 using hot melt adhesive. The screen printing mesh is laid flat and has a certain tension. High-temperature resistant hot melt adhesive is evenly applied around the contact surface between the plastic frame and the screen printing mesh, and then the plastic frame is bonded to the screen printing mesh to ensure uniform mesh tension. The lower housing 3 below the air filter element is provided with an inward protrusion 31. The plastic frame 6 is snapped between the air filter element 5 and the inward protrusion 31 of the lower housing, that is, the lower end face of the plastic frame 6 is placed at the inward protrusion 31, and the upper end face is pressed down and fixed by the air filter element 5. This structure is convenient for installation and easy for later removal, cleaning and maintenance. There is a gap between the upper end face of the screen printing mesh and the lower end face of the air filter element, which is generally 5-10mm.

[0021] As a variation of this embodiment, the mesh count of the screen printing mesh can be determined according to the actual situation, generally using 150-250 mesh screen printing mesh.

[0022] Comparative experiment: Experimental example: Using the structure described in Example 1, the air filter element 5 is a paper filter element, and the pre-filter is a 200-mesh screen-printed mesh made of nylon material.

[0023] Comparative Example 1: Its structure is the same as the experimental example, except that the pre-filter is omitted.

[0024] Comparative Example 2: Compared with the experimental example, the pre-filter uses a W-shaped pre-filter, which is made of thin plastic folded into a W shape and has several air holes spaced apart. Other structures are the same as the experimental example.

[0025] Comparative Example 3: Its structure is the same as that of the experimental example, except that the upper surface of the screen-printed yarn is in contact with the lower surface of the air filter element.

[0026] During the test, A4 ash was used, and the rated airflow rate was 428 m³ / h. 3 / h.

[0027] The experimental results are shown in the table below.

[0028]

[0029] As shown in the table above, Comparative Example 1, with its conventional filter cartridge without a pre-filter, has a total dust capacity of 345g, with 193g of dust naturally falling to the bottom of the housing. The experimental example, which added a screen-printed mesh as a pre-filter, has a total dust capacity of 635g, with 490g of dust falling to the lower housing after pre-filtration, 300g more than Comparative Example 1. Comparative Example 2, although it added a pre-filter, used a W-shaped pre-filter, resulting in poorer filtration; its total dust capacity and coarse filter capacity were actually lower than those of the conventional structure in Comparative Example 1. Comparative Example 3 also used a screen-printed mesh as a pre-filter, but it was directly attached to the air intake surface of the air filter cartridge, resulting in poor pre-filtration.

Claims

1. A novel automotive air filter, comprising a housing and an air filter element (5) installed within the housing, the housing being composed of an upper housing (1) and a lower housing (3), wherein an air inlet (4) is provided on the lower housing below the air filter element, and an air outlet (2) is provided on the upper housing above the air filter element, characterized in that: A pre-filter (7) is also provided below the air filter element. The pre-filter is a screen-printed mesh, and a plastic frame (6) is connected to the upper edge of the screen-printed mesh. The plastic frame is installed on the lower housing.

2. The novel automotive air filter according to claim 1, characterized in that: The mesh count of the screen printing yarn is 150-250.

3. A novel automotive air filter according to claim 1 or 2, characterized in that: The lower housing below the air filter is provided with an inward protrusion (31). The plastic frame (6) is clamped between the air filter (5) and the inward protrusion (31) of the lower housing. There is a gap between the upper surface of the screen-printed mesh and the lower surface of the air filter.

4. A novel automotive air filter according to claim 1 or 2, characterized in that: The screen printing mesh is bonded to the plastic frame using hot melt adhesive.

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