Direct insertion type carbon tank ventilation filter

Abstract

The utility model relates to the field of automobile gasoline steam collection, and discloses a direct insertion type carbon tank ventilation filter which comprises a filtering device, a shell and a base, a plurality of ventilation holes are formed in the bottom of the base, a guide column is further arranged on the base, an inner hole is formed in the top end of the guide column and is a through hole, and a through hole is formed in the shell. The filtering device comprises filtering foam and non-woven fabric, the space between the base and the shell is filled with the filtering foam and the non-woven fabric in sequence, external air passes through the filtering foam and the non-woven fabric in sequence, the shell is a hollow cylinder with one closed end, and the non-closed end is detachably connected to the base. The device is easy and convenient to mount and dismount, high in universality and good in operability.

Description

Technical Field

[0001] The utility model relates to the field of automobile gasoline vapor collection, in particular to a direct-insertion carbon canister ventilation filter. Background Art

[0002] The carbon canister of the car is connected to the atmosphere. During the ventilation process of the carbon canister, in order to ensure that the carbon canister and the carbon canister solenoid valve are not polluted by dust in the air, causing problems such as blockage and stagnation, a ventilation filter is generally added. Currently, there are two types of ventilation filters, one is integrated with the carbon canister, and the other is assembled separately. The one integrated with the carbon canister cannot be disassembled, which is inconvenient for maintenance; the one assembled separately is a quick-insert structure with a connecting pipe in the middle, which has a complex structure and a high overall cost.

[0003] The prior art provides an automobile carbon canister assembly and an automobile fuel evaporative emission system (publication number: CN203081616U), including a carbon canister body and an air filter housing fixedly connected to the air inlet side of the carbon canister, and a sponge filter element arranged in the air filter housing, a threaded mounting hole is provided on the air filter housing, a mounting column with a threaded hole is preset at the corresponding position of the carbon canister, and a threaded connector connects the two threaded holes to fix the air filter on the carbon canister. This solution omits the connecting pipe, which simplifies the structure and installation of the carbon canister air filter to a certain extent, but it still needs to preset the mounting column and mounting hole on the carbon canister, which is not universal, and the threaded connector is relatively complicated to disassemble and assemble, which is inconvenient to operate. Utility Model Content

[0004] The utility model aims to provide a direct-insertion carbon canister ventilation filter to solve the problem that the existing carbon canister air filter is relatively complicated to install and disassemble.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A plug-in carbon canister ventilation filter comprises a filtering device, an outer shell, and a base. A plurality of ventilation holes are opened at the bottom of the base. A guide column is also provided on the base. An inner hole is opened at the top of the guide column. The inner hole is a through hole. The filtering device comprises filtering foam and non-woven fabric. The filtering foam and non-woven fabric are sequentially filled between the base and the outer shell. External air passes through the filtering foam and non-woven fabric in turn. The outer shell is a hollow cylinder with one end closed, and the non-closed end is detachably connected to the base.

[0007] The principle of this solution is: in actual application, the inner hole on the guide column of the utility model is aligned with the ventilation interface of the automobile carbon canister, and the utility model is put on. The outside air enters through the ventilation hole at the bottom of the base, passes through the filter foam for the first stage of coarse filtration, which mainly filters large particles of dust, and then enters the non-woven fabric for the second stage of fine filtration, which mainly filters fine dust. After two stages of filtration, the air has dust impurities removed and enters the ventilation interface of the carbon canister.

[0008] The advantages of this solution are:

[0009] 1. This solution can be directly installed on the carbon canister ventilation interface, without the need to install additional quick-connect connectors and connecting pipes, and without the need to preset mounting columns, mounting holes, etc. on the carbon canister. It has strong universality and can be applied to most automotive carbon canisters on the market.

[0010] 2. This solution has a simple and reliable structure, is easy to manufacture, and has low cost, which can greatly reduce enterprise costs.

[0011] 3. This solution is quick to install and easy to disassemble, and does not require additional disassembly tools. When the air filter is damaged or blocked, it is convenient for users to quickly replace the air filter.

[0012] Preferably, as an improvement, an elastic clip is provided on the guide column, the head of the elastic clip is inclined toward the inner side of the guide column, and the inclination angle between the elastic clip and the guide column is 60 degrees. Most carbon canister vent interfaces on the market have convex edges on their outer edges. After the ventilation filter is installed on the carbon canister vent interface, the elastic clip can clamp the convex edge to prevent the ventilation filter from falling off the carbon canister vent interface. At the same time, the inclination angle between the elastic clip and the guide column is set to 60 degrees, which can provide better clamping force and will not be too inclined to affect installation.

[0013] Preferably, as an improvement, the filter foam is in the shape of a hollow cylinder and is sleeved around the outer periphery of the guide column. The filter foam is used for coarse filtering of external air, and the main filtering object is large dust particles in the air. The filter foam is set in the shape of a hollow cylinder and sleeved around the outer periphery of the guide column, which can prevent the filter foam from shifting and slipping, thereby ensuring the filtering effect of the ventilation filter.

[0014] Preferably, as an improvement, the non-woven fabric is a sheet-shaped ring, which is arranged on the top of the filter foam. The non-woven fabric is used for fine filtering of the outside air, and the main filtering object is the fine dust in the air. It is arranged as a sheet-shaped ring and on the top of the filter foam to ensure that the outside air is first coarsely filtered and then finely filtered, which not only ensures the air exchange efficiency but also can obtain the maximum filtering effect.

[0015] Preferably, as an improvement, a buckle is provided at the bottom of the base, a convex edge is provided at the inner edge of the bottom of the shell, and the buckle and the convex edge cooperate with each other. The shell and the base are fixed by the clamping connection between the convex edge and the buckle.

[0016] Preferably, as an improvement, the bottom of the shell is provided with a plurality of openings, which are distributed along the circumference of the bottom of the shell. The openings can play an elastic role when the shell is installed, which is convenient for installation, and can also take into account the functions of ventilation and water leakage.

[0017] Preferably, as an improvement, a plurality of guide plates arranged circumferentially are provided inside the shell. When the air filter is installed on the carbon canister ventilation interface, the guide plate can provide a guiding function, and can also prevent the carbon canister ventilation interface from contacting the shell, resulting in poor air circulation. It can also guide air flow and facilitate air in and out. The guide plate can provide a reinforcing rib, which can effectively improve the shell strength and prevent deformation or damage caused by bumps.

[0018] Preferably, as an improvement, a limiting device is provided on the top of the guide plate, which can prevent the carbon canister ventilation interface from contacting the top of the shell, resulting in poor air circulation.

[0019] Preferably, as an improvement, the outer shell is in the shape of a stepped cylinder. The upper part of the outer shell is a hollow cylinder with a diameter smaller than that of the lower part. Reducing the diameter of the upper cylinder of the outer shell can further enhance the strength of the outer shell. At the same time, the shoulder position of the transition between the upper and lower parts of the outer shell can provide a limiting effect for the filter device to prevent the filter device from falling out.

[0020] Preferably, as an improvement, the inner hole is transitionally matched with the carbon canister ventilation interface. The transitional match between the inner hole and the carbon canister ventilation interface is conducive to the disassembly and assembly between the carbon canister ventilation filter and the carbon canister ventilation joint, and can also seal the carbon canister ventilation interface to a certain extent to prevent air from entering and exiting between the inner hole and the carbon canister ventilation interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0022] Figure 2 It is a front view and cross-sectional view of an embodiment of the utility model;

[0023] Figure 3 is a schematic diagram of the structure of the base;

[0024] Figure 4 A schematic diagram of the structure of the shell. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The reference numerals in the drawings of the specification include: base 1, filter foam 2, non-woven fabric 3, shell 4, vent 5, guide column 6, inner hole 7, elastic clip 8, guide plate 9, limit portion 10, buckle 11, convex edge 12, opening 13.

[0027] The embodiment is basically as shown in the attached Figure 1 As shown:

[0028] A plug-in carbon canister ventilation filter is detachably connected to the carbon canister ventilation interface, including a filtering device, a shell 4, and a base 1. The bottom of the base 1 is provided with a plurality of ventilation holes 5, which are evenly distributed circumferentially on the bottom of the base 1. The base 1 is also provided with a guide column 6, and the top of the guide column 6 is provided with an inner hole 7, and the inner hole 7 is a through hole, which is used to fit the automobile carbon canister ventilation interface. In order to facilitate the disassembly of the device and provide a certain sealing effect, the inner hole 7 is transitionally matched with the carbon canister ventilation interface. An elastic clip 8 is provided on the guide column 6. In order to facilitate disassembly, in this embodiment, the number of elastic clips 8 is one, and the head of the elastic clip 8 is inclined toward the inner side of the guide column 6. The inclination angle between the elastic clip 8 and the guide column 6 is 60 degrees.

[0029] The filtering device includes filter foam 2 and non-woven fabric 3. The filter foam 2 is in the shape of a hollow cylinder and is sleeved on the outer periphery of the guide column 6. The non-woven fabric 3 is a sheet-like ring and is arranged on the top of the filter foam 2. The filter foam 2 and the non-woven fabric 3 are sequentially filled between the base 1 and the outer shell 4, and the outside air passes through the filter foam 2 and the non-woven fabric 3 in turn.

[0030] The outer shell 4 is in the shape of a stepped cylinder, with one end with a slightly smaller diameter being closed, and the other end being detachably connected to the base 1. The shoulder position where the upper and lower parts of the outer shell 4 transition is in contact with the non-woven fabric 3. The base 1 and the outer shell 4 are made of plastic material or elastic metal material. In this embodiment, plastic material is used. There are a number of openings at the bottom of the outer shell 4, which are distributed circumferentially along the bottom of the outer shell 4. There are a number of guide plates 9 arranged circumferentially inside the outer shell 4. There is a limiting portion 10 at the top of the guide plate 9. After the carbon canister ventilation interface of this device is installed, the carbon canister ventilation interface can contact the limiting portion 10. A buckle 11 is provided at the bottom of the base 1, and a convex edge 12 is provided at the inner edge of the bottom of the outer shell 4. The buckle 11 and the convex edge 12 cooperate to prevent the outer shell 4 from detaching from the base 1.

[0031] When in use, the base 1 of the utility model is installed to the ventilation interface of the automobile carbon canister. Specifically, the inner hole 7 of the guide column 6 is aligned with the ventilation interface of the automobile carbon canister, and the utility model is installed downward so that the ventilation interface of the automobile carbon canister passes through the guide column 6 and contacts the limiting device 10 on the guide plate 9. Since the air interface of the automobile carbon canister usually has a raised edge, the elastic clip 8 will be clamped at the edge after sliding across the edge, and the device is fixed on the ventilation interface of the automobile carbon canister to complete the installation of the carbon canister ventilation filter.

[0032] During use, when outside air needs to enter the automobile carbon canister, it first enters the carbon canister ventilation filter through the vent hole 5 at the bottom of the base 1 and the opening of the outer shell 4. The outside air passes through the filter foam 2 and the non-woven fabric 3 in turn, blocking large particles of dust outside the filter foam 2 and fine dust outside the non-woven fabric 3. The filtered air is guided by the guide plate 9 to smoothly enter the automobile carbon canister ventilation interface; when the gas inside the automobile carbon canister needs to be discharged, the movement direction of the gas is opposite to the above.

[0033] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A plug-in carbon canister ventilation filter, which is detachably connected to the carbon canister ventilation interface, comprises a filtering device and a housing, and is characterized in that: It also includes a base, a plurality of ventilation holes are opened at the bottom of the base, a guide column is also provided on the base, an inner hole is opened at the top of the guide column, and the inner hole is a through hole. The filtering device includes filter foam and non-woven fabric, and the filter foam and non-woven fabric are sequentially filled between the base and the shell, and the outside air passes through the filter foam and non-woven fabric in turn. The shell is a hollow cylinder with one end closed, and the non-closed end is detachably connected to the base.

2. The plug-in carbon canister breather filter according to claim 1, characterized in that: An elastic clip is arranged on the guide column, the head of the elastic clip is inclined toward the inner side of the guide column, and the inclination angle between the elastic clip and the guide column is 60 degrees.

3. The plug-in type carbon canister breather filter according to claim 2, characterized in that: The filter foam is in the shape of a hollow cylinder and is sleeved on the outer periphery of the guide column.

4. The plug-in type carbon canister breather filter according to claim 3, characterized in that: The non-woven fabric is a sheet-shaped circular ring and is arranged on the top of the filter foam.

5. The plug-in type carbon canister breather filter according to claim 4, characterized in that: A buckle is provided at the bottom of the base, and a convex edge is provided at the inner edge of the bottom of the shell, and the buckle and the convex edge are matched.

6. The plug-in type carbon canister breather filter according to claim 5, characterized in that: The bottom of the shell is provided with a plurality of openings, which are distributed along the circumference of the bottom of the shell.

7. The direct-insertion carbon canister breather filter according to claim 6, characterized in that: A plurality of guide plates arranged circumferentially are arranged inside the shell.

8. The plug-in type carbon canister breather filter according to claim 7, characterized in that: The top of the guide plate is provided with a limiting device.

9. The direct-insertion carbon canister breather filter according to claim 8, characterized in that: The outer shell has a stepped cylindrical shape.

10. The plug-in type carbon canister breather filter according to claim 9, characterized in that: The inner hole is transitionally matched with the carbon canister ventilation interface.

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