Automobile carbon canister air filter

Abstract

The invention relates to the field of filters, and in particular to an automobile charcoal canister air filter, comprising a canister body, wherein a central hole in the canister body forms a storage cavity; a filter element is arranged in the canister body, and an air inlet and an air outlet are arranged on the canister body; the air inlet and the air outlet are staggered; the invention discloses an automobile charcoal canister air filter, wherein the filter element is arranged inside a shell body, and the air inlet and the air outlet are staggered, so as to ensure that the air entering the filter is filtered by the filter element, thereby avoiding the problem that the OBD pressure sensor is stuck or worn and causes failure due to the air with foreign matter entering the fuel evaporation system.

Description

Technical Field

[0001] The invention relates to the field of filters, in particular to an automobile carbon canister air filter. Background Art

[0002] The automobile fuel evaporation control system mainly includes the fuel tank, activated carbon canister, carbon canister solenoid valve, carbon canister air filter and OBD pressure sensor.

[0003] The Chinese translation of OBD is on-board diagnostic system.

[0004] The charcoal canister air filter is also called the ash filter. It is a charcoal canister breather or a charcoal canister air dust collector, etc. It is also an important component of the automobile fuel evaporation control system.

[0005] After the emission requirements entered the National VI stage, the fuel evaporation system was included in the OBD monitoring range. In order to protect the OBD pressure sensor in the fuel evaporation system from being stuck or worn and causing failure, and to ensure the reliability of the system, it is necessary to filter the air entering it to ensure the cleanliness of the incoming air, which also creates the necessity for the existence of the carbon canister air filter.

[0006] Carbon canister air filters can also be used in the fuel evaporation control system of hybrid vehicles. At the same time, in vehicles that meet the National V emission requirements and below, carbon canister air filters can be used to ensure the cleanliness of the air entering the carbon canister and ensure that the carbon canister is not blocked and affects the function of the carbon canister. However, the carbon canister air filters currently used cannot be self-cleaning. In an environment with large particles and dust, the carbon canister air filters need to be constantly cleaned or replaced, and their service life is generally short.

[0007] In order to address the deficiencies in the prior art, a canister air filter that can purify the air entering the fuel evaporation control system, achieve the functional requirements of the fuel evaporation control system, and can cope with harsh environments (particulate matter and muddy water in the air) is now needed. Summary of the invention

[0008] The object of the present invention is to overcome the deficiencies of the prior art and provide a canister air filter capable of purifying the air entering into a fuel evaporation control system.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] An automobile carbon canister air filter comprises a canister body, wherein a storage cavity is formed by a central hole inside the canister body; a filter element is arranged inside the canister body, and an air inlet and an air outlet are arranged on the canister body; the air inlet and the air outlet are staggered.

[0011] The air inlet is in a strip shape in horizontal projection.

[0012] The air inlet is located below the tank body.

[0013] The tank body is provided with an avoidance gap, the avoidance gap is arranged close to the air inlet, the depth of the avoidance gap is less than the wall thickness of the tank body; the avoidance gap is connected with the air inlet.

[0014] The horizontal projection area of ​​the air inlet is not less than the projection area of ​​the air outlet.

[0015] A blocking mechanism is arranged in the tank body, and the blocking mechanism comprises a blocking plate arranged in the tank body, and the blocking plate is arranged above the air inlet.

[0016] The blocking plate is an arc-shaped plate, and both the inner side surface and the outer side surface of the blocking plate are arc-shaped surfaces.

[0017] The edge of the blocking plate close to the inner wall of the tank body is provided with an avoidance groove.

[0018] The tank body comprises a shell, an end cover is provided at the end of the shell, the air inlet is arranged on the shell, and the air outlet is arranged on the end cover; the air outlet is connected to a connecting pipe.

[0019] A filter element positioning mechanism is provided in the tank body; the filter element positioning mechanism includes a first clamping plate and a second clamping plate arranged in the tank body, and the first clamping plate and the second clamping plate are distributed at both ends of the filter element; the first clamping plate is connected to the shell, and the second clamping plate is connected to the end cover; an avoidance through hole is provided on the second clamping plate.

[0020] The advantages of the present invention are:

[0021] The invention discloses an automobile carbon canister air filter. The invention arranges a filter element inside a shell, and an air inlet and an air outlet are staggered, so that the air entering the filter is filtered by the filter element, thereby avoiding the problem that the OBD pressure sensor is stuck and worn and causes failure due to the air containing foreign matter entering the fuel evaporation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0025] Figure 3 is a cross-sectional view of the assembly of the present invention;

[0026] Figure 4 It is a schematic diagram of the principle of the present invention when working in the fuel evaporation control system in the forward direction;

[0027] Figure 5 It is the air operation route map of the present invention;

[0028] Figure 6 This is a front view of the optimized blocking mechanism of the present invention;

[0029] Figure 7 is a top view of the optimized blocking mechanism in the present invention;

[0030] Figure 8 It is a side view of the broken top plate in the present invention.

[0031] The marks in the above figure are:

[0032] 1. tank body, 2. air inlet, 3. snap mechanism, 4. air outlet, 5. blocking mechanism, 6. second clamping plate, 61. first clamping plate, 7. filter element. DETAILED DESCRIPTION

[0033] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0034] An automobile charcoal canister air filter comprises a canister body 1, wherein a central hole inside the canister body 1 forms a storage cavity 111; a filter element 7 is arranged inside the canister body 1, and an air inlet 2 and an air outlet 4 are arranged on the canister body 1; the air inlet 2 and the air outlet 4 are staggered; the present invention discloses an automobile charcoal canister air filter, wherein the filter element 7 is arranged inside a shell body 11, and the air inlet 2 and the air outlet 4 are staggered, thereby ensuring that the air entering the filter is filtered by the filter element 7, thereby avoiding the problem that the OBD pressure sensor is stuck or worn and causes failure due to the air with foreign matter entering the fuel evaporation system.

[0035] Specifically, the automobile carbon canister air filter disclosed in the present invention plays a filtering role to ensure the cleanliness of the air entering the fuel evaporation system.

[0036] The automobile carbon canister air filter disclosed in the present invention mainly comprises a canister 1, a filter element 7 is arranged inside the canister 1, an air inlet 2 of the canister 1 is connected to an external connection, and the air inlet 2 is connected to the carbon canister, so as to ensure the cleanliness of the air entering the carbon canister, and further ensure the cleanliness of the air entering the fuel evaporation system.

[0037] Furthermore, in the present invention, the horizontal projection of the air inlet 2 is in the shape of an elongated strip. The elongated air inlet 2 can ensure the air intake of the filter, ensure the sufficient air intake of the charcoal canister, and avoid the insufficient air intake affecting the normal use of the device. In addition, the elongated air inlet 2 facilitates the production and processing of the air inlet 2. In addition, the air inlet 2 shell extends along the length direction of the filter element 7, which can make full use of the overall length of the filter element 7 and avoid the problem of low overall utilization of the filter element 7 due to local air intake of the traditional filter.

[0038] Furthermore, in the present invention, the air inlet hole is located below the tank body 1; the air inlet hole is located below the tank body 1, which can prevent water on the surface of the tank body 1 from entering the interior of the tank body 1 when the entire vehicle is in use, and at the same time facilitates the natural discharge of water and debris under the influence of gravity when debris or water enters the tank body 1, so that the filter has self-cleaning ability.

[0039] Furthermore, in the present invention, an avoidance notch 21 is provided on the tank body 1, and the avoidance notch 21 is arranged close to the air inlet 2, and the depth of the avoidance notch 21 is less than the wall thickness of the tank body 1; the avoidance notch 21 is connected to the air inlet 2; the setting of the avoidance notch 21 is equivalent to increasing the size of the air inlet 2, which facilitates the air intake operation, and at the same time, the avoidance notch 21 is equivalent to an arc groove structure, which will form a step on the inner wall of the tank body 1, playing a good blocking role. When the airflow flows along the inner wall of the tank body 1, the step can block impurities in the airflow to prevent larger debris from entering the interior of the tank body 1.

[0040] Furthermore, in the present invention, the horizontal projection area of ​​the air inlet 2 is not less than the projection area of ​​the air outlet 4; such a setting can ensure the air intake volume of the filter.

[0041] Furthermore, in the present invention, a blocking mechanism 5 is provided in the tank body 1, and the blocking mechanism 5 includes a blocking plate 51 arranged in the tank body 1, and the blocking plate 51 is arranged above the air inlet; one function of the blocking plate 51 is to play a blocking role to prevent larger debris from entering the interior of the tank body 1, and another function is to play a fixed support role, the purpose is to facilitate the side support of the filter element 7 and facilitate the stability of the filter element 7 placed in the tank body 1. In addition, the blocking plate 51 of the present invention also plays a guiding role, so that the air entering the tank body 1 through the air inlet 2 moves toward the edge of the tank body 1, increasing the air flow range, facilitating the air filtering operation from multiple areas around the filter element 7, making full use of the filter element 7, and at the same time increasing the air flow path, facilitating the autonomous discharge of debris.

[0042] Furthermore, in the present invention, the blocking plate 51 is an arc-shaped plate, and the inner side surface and the outer side surface of the blocking plate 51 are both arc-shaped surfaces; the setting of the arc-shaped plate and the use of the arc-shaped surface make the upper end of the arc-shaped plate have an arc-shaped groove, which is convenient for the side positioning of the filter element 7; at the same time, the fit between the arc-shaped plate and the filter element 7 is ensured; and the outer side surface is an arc-shaped surface, which reduces the flow obstruction of the blocking plate 51 to the airflow, and at the same time can also facilitate the gas diversion; increase the flow range of the air.

[0043] Furthermore, in the present invention, the baffle plate 51 is provided with an avoidance groove 511 at the edge of one side of the inner wall of the tank body 1; the setting of the avoidance groove 511 increases the opening of the air inlet 2 to a certain extent, which can well ensure the air intake of the filter tank; in addition, in the present invention, the avoidance groove 511 is arranged relative to the avoidance notch 21 mentioned above, which better ensures the air intake of the tank body 1; at the same time, it also plays a good transition role, which is to transfer the airflow from the small opening channel to the large opening channel, so that the airflow dispersion range is increased, thereby reducing the impact of the airflow on the filter element.

[0044] Furthermore, in the present invention, the tank body 1 includes a shell 11, an end cover 12 is provided at the end of the shell 11, the air inlet 2 is arranged on the shell 11, and the air outlet 4 is arranged on the end cover 12; the air outlet 4 is connected to a connecting pipe 13; in the present invention, the shell 11 is used to place the filter element 7, and the end cover 12 is connected to the shell 11 using a detachable connection method, specifically, the end of the shell 11 is provided with an external thread, and the inner side of the end cover 12 is provided with an internal thread, and the end cover 12 is connected to the shell 11 through the thread, and in addition, a connecting pipe 13 is provided on the end cover 12, and the setting of the connecting pipe 13 facilitates the connection between the filter and the carbon canister.

[0045] Furthermore, in the present invention, a filter element positioning mechanism is provided in the tank body 1; the filter element positioning mechanism includes a first clamping plate 61 and a second clamping plate 6 arranged in the tank body 1, and the first clamping plate 61 and the second clamping plate 6 are distributed at both ends of the filter element 7; the first clamping plate 61 is connected to the shell body 11, and the second clamping plate 6 is connected to the end cover 12; the coordinated use of the first clamping plate 61 and the second clamping plate 6 can well realize the clamping and fixing of the filter element 7; in addition, in the present invention, an avoidance through hole is provided on the second clamping plate 6, and the setting of the avoidance through hole facilitates the circulation of air.

[0046] A charcoal canister air filter disclosed in the present invention can purify the air entering into a fuel evaporation control system, realize the functional requirements of the fuel evaporation control system, can cope with harsh environments (particulate matter and muddy water in the air), has the characteristics of long service life, and solves the problem that the charcoal canister air filter has a short service life and requires constant maintenance.

[0047] Specifically, the carbon canister air filter disclosed in the present invention is mainly used for automobile fuel evaporation control systems that meet the requirements of National VI and emission regulations.

[0048] The present invention adopts the following technical scheme: a carbon canister air filter, comprising a canister body 1, a filter element 7, an end cover 12 and a snap mechanism 3 arranged on the outside of the canister body 1; the snap mechanism 3 mainly comprises a fixed snap arranged on the canister body 1, and the setting of the fixed snap facilitates the installation and connection of the carbon canister air filter; in addition, in the present invention, the canister body 1 is a columnar structure, the canister body 1 comprises a shell 11, an end cover 12 is arranged at the end of the shell 11, and a connecting pipe 13 is coaxially connected to the end cover 12, a filter element 7 is arranged inside the shell 11, and the filter element 7 is snapped into the inside of the shell 11 along the axial direction of the shell 11. In actual arrangement, the outer diameter of the filter element 7 is required to be smaller than the inner diameter of the shell 11. Such a setting makes the filter element 7 and the shell 11 have a good connection. There is a gap to facilitate the circulation of air flow inside the shell 11 and the air intake operation around the filter element 7; in the actual design, the air inlet 2 is required to be set at the lower end of the tank body 1; the air inlet 2 needs to face downward during installation, and the air inlet 2 is convenient for air to pass through and the pressure difference to meet the system requirements. The total opening area of ​​the air inlet 2 is greater than or equal to the area of ​​the air outlet 4, and the air outlet 4 can be circular, rectangular or other shapes. The air inlet 2 is preferably rectangular, that is, the waist-shaped hole or rectangular hole mentioned above; the air inlet 2 of the present invention is a rectangular air intake structure, as shown in the accompanying drawings. In addition, the present invention is provided with two air inlets 2. In the actual arrangement, the two air inlets 2 are spaced apart, and a diversion rib 52 is formed between the two air inlets 2 to facilitate the diversion of the intake airflow.

[0049] In addition, in the present invention, a plurality of supporting ribs are provided on the shell, and the plurality of supporting ribs play a good supporting role and at the same time well ensure the stability of the shell arranged on the vehicle body.

[0050] In addition, a blocking mechanism 5 is provided inside the shell 11 in the present invention; the blocking mechanism 5 includes a blocking plate 51, and the blocking plate 51 can be connected to the inside of the shell 11 in a detachable manner, or other connection methods can be adopted, such as injection molding together with the shell 11; the above-mentioned blocking plate 51 can be connected to the above-mentioned diverter rib 52; in addition, in the present invention, the height dimension of the diverter rib 52 is greater than the shell wall thickness; such a setting plays a good role in raising the height, avoiding the blocking plate from fitting against the inner wall of the shell and affecting the air intake operation.

[0051] In addition, in the present invention, a plurality of top-breaking plates 53 are provided at the lower end of the baffle plate, and the top-breaking plates 53 are inverted triangles. With such a configuration, the top-breaking plates 53 are an impact structure, which facilitates the crushing of large particles of debris when they collide with the top-breaking plates 53, thereby facilitating the subsequent discharge of debris. In addition, in the present invention, the top-breaking plates 53 are arranged perpendicular to the axial direction of the shell, and the top-breaking plates 53 are arranged perpendicular to the diverter ribs 52 and the baffle plate. The top-breaking plates 53, the baffle plate and the diverter ribs 52 are arranged in an intersecting manner.

[0052] In the present invention, after the air enters the shell 11 through the air inlet 2, it does not immediately contact the filter element 7, but is guided to the periphery of the filter element 7 by the blocking plate 51 in the shell 11. The airflow is filtered through the filter element 7 to provide clean air to the charcoal canister. In case of a harsh environment, such as poor air quality and muddy water splashing onto the charcoal canister filter, the muddy water will not directly impact the filter element 7 due to the blocking mechanism 5 inside the charcoal canister air filter. Even if the water flow is large and impacts the inside of the shell 11, it will leak out from the air inlet 2 under the action of gravity, thus achieving a self-cleaning effect. Under the same conditions and the same principle, the particulate matter in the air that has been filtered for a long time will also fall off from the ventilation point under the vibration of the entire vehicle and the gravity of the particulate matter itself. Under the same conditions, the service life of this charcoal canister air filter is far superior to similar products.

[0053] The filter element 7 mainly includes filter material, which is wound on a frame. The filter element 7 is glued to the clamping plates at both ends; mainly, the filter material is glued to the end support plates.

[0054] The connection between the housing 11 and the end cover 12 may be threaded or snap-fitted.

[0055] The present invention has the following advantages: the present invention seals the filter element 7 inside the shell 11, which can ensure that all the air can be filtered by the filter element 7. The filter element 7 adopts a winding structure, which can provide a larger filtering area, and the air inlet 2 is a rectangular air inlet structure. The two rectangular air inlet structures are injection molded together with the shell 11, and a waterproof and dustproof blocking mechanism 5 is provided on the inner side of the air inlet 2. After the air enters the air inlet 2, it is not immediately connected with the filter element 7, but is guided to the periphery of the filter element 7 by the blocking mechanism 5 in the shell 11. This can not only make the incoming air evenly contact with the filter element 7, but also make full use of the filter element 7 and improve the service life of the filter element 7. In addition, when the environment is relatively harsh, the air quality is poor, and muddy water splashes onto the carbon canister filter, due to the existence of the blocking mechanism 5 inside the carbon canister air filter, the muddy water will not directly impact the filter element 7. Even if the water flow is large and impacts the inner side of the shell 11, it will also leak out from the ventilation vent under the action of gravity, which plays a self-cleaning role, avoiding the manpower, material resources, expenses and time spent on continuous maintenance, and greatly improving the service life of the product.

[0056] The air inlet 2 adopts two rectangular air inlet structures to facilitate the passage of air. The air inlet surface is greater than or equal to the air outlet area of ​​the end cover 12, and the ventilation resistance is less than 0.15kpa. The inner side of the air inlet 2 of the shell 11 is designed with a blocking mechanism 5, which can not only allow the air to enter smoothly and evenly and contact the filter element 7 to reduce the flow resistance; its blocking mechanism 5 prevents particles and sand from directly contacting the filter element 7; when the engine's intake manifold needs to inhale air, the charcoal canister air filter works forward, and the filtered air can protect the components in the entire fuel evaporation control system; when the car stops to refuel, the charcoal canister ash filter works in reverse to balance the pressure inside the fuel evaporation control system, so that refueling can be carried out smoothly.

[0057] The present invention adopts a blocking mechanism 5, which has the advantages of small flow resistance, light weight, high ash capacity, long service life, etc. It can purify the air entering the fuel evaporation control system and protect the OBD components in the fuel evaporation control system. At the same time, it ensures that the tank gas filtered by the carbon canister when the car is refueled is smoothly discharged into the atmosphere through the carbon canister ash filter, meets the functional requirements of the fuel evaporation control system, is easy to promote, and has great use value.

[0058] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. An automobile canister air filter, characterized in that: It includes a tank body, wherein a hole in the tank body forms a storage cavity; a filter element is arranged in the tank body, and an air inlet and an air outlet are arranged on the tank body; the air inlet and the air outlet are staggered; The horizontal projection of the air inlet is in the shape of a long strip; the air inlet extends along the length direction of the filter element; The tank body is provided with a blocking mechanism, the blocking mechanism includes a blocking plate disposed in the tank body, the blocking plate is disposed above the air inlet; The blocking plate is an arc-shaped plate, and the inner side surface and the outer side surface of the blocking plate are both arc-shaped surfaces; The blocking plate is connected to the diversion rib plate; the height of the diversion rib plate is greater than the wall thickness of the shell; The tank body is provided with an avoidance notch, the avoidance notch is arranged close to the air inlet, the depth of the avoidance notch is less than the wall thickness of the tank body; the avoidance notch is connected to the air inlet; The avoidance gap will form a step on the inner wall of the tank; The blocking plate is provided with an avoidance groove at the edge of one side close to the inner wall of the tank body; a plurality of top-breaking plates are provided at the lower end of the blocking plate, and the top-breaking plates are in the shape of an inverted triangle; The avoidance groove and the avoidance gap are arranged opposite to each other; The top-breaking plate is arranged perpendicular to the axial direction of the shell, and the top-breaking plate is arranged perpendicular to the flow-dividing rib plate and the blocking plate; the top-breaking plate, the blocking plate and the flow-dividing rib plate are arranged to intersect; The tank body comprises a shell, an end cover is provided at the end of the shell, the air inlet is provided on the shell, and the air outlet is provided on the end cover; the air outlet is connected to a connecting pipe; The air inlet is located below the tank body; A filter element positioning mechanism is provided in the tank body; the filter element positioning mechanism comprises a first clamping plate and a second clamping plate provided in the tank body, the first clamping plate and the second clamping plate are distributed at both ends of the filter element; the first clamping plate is connected to the housing, and the second clamping plate is connected to the end cover; an avoidance through hole is provided on the second clamping plate; The baffle is used for the side support of the filter element.

2. The automobile canister air filter according to claim 1, characterized in that: The horizontal projection area of ​​the air inlet is not less than the projection area of ​​the air outlet.

3. The automobile canister air filter according to claim 1, characterized in that: A buckle mechanism is arranged on the outer side of the tank body.

Images