Automobile carbon can with multi-cavity filtering

Abstract

The application relates to a car carbon tank with multi-cavity filtration, and belongs to the technical field of carbon tanks. The car carbon tank comprises a shell, an adsorption pipeline and a ventilation pipeline, the shell comprises a first cavity, a second cavity and a third cavity, the first cavity is communicated with the adsorption pipeline, a first filter piece, a second filter piece, a third filter piece, a first flow-through piece and a reset assembly are arranged in the first cavity, the first flow-through piece is connected with the first cavity, the first filter piece and the second filter piece are slidably connected with the side wall of the first cavity in a first direction, the side wall of the first cavity is provided with a flow guide groove, the first filter piece is matched with the first end of the flow guide groove, the second end of the flow guide groove is arranged between the second filter piece and the end face of the first cavity, the reset assembly is connected with the first cavity and the first filter piece, and the third filter piece is arranged on the side wall of the first cavity; the second cavity is empty inside and is communicated with the first cavity through the first flow-through piece; the third cavity is communicated with the second cavity and the ventilation pipeline, and a fourth filter piece is arranged in the third cavity. The application has the effect of improving the filtration effect of the carbon tank.

Description

Technical Field

[0001] This application relates to the field of carbon canister technology, and in particular to an automotive carbon canister with a multi-chamber filter. Background Technology

[0002] Gasoline is a volatile liquid, so gasoline in a car's fuel tank will evaporate into vapor. During the car's exhaust emissions, gasoline vapor will be released into the atmosphere, causing environmental pollution.

[0003] Carbon canisters are used to adsorb and desorb gas during exhaust emissions. They are typically located between the fuel tank and the engine to adsorb and store gasoline vapors in the exhaust gas, which are then desorbed and introduced into combustion when the engine starts. As a filtration structure in the automotive exhaust emission system, the carbon canister filters exhaust gases, reducing pollution caused by them.

[0004] However, the carbon canisters currently in use have relatively simple internal carbon powder chambers, resulting in a short airflow path and high flow velocity within the canister. Consequently, even after the airflow passes through the carbon powder chamber for filtration, the exhaust gas still contains a high content of hydrocarbons, leading to poor filtration and difficulty in meeting environmental protection requirements.

[0005] Regarding the aforementioned technologies, the inventors believe that there is a drawback in the filtration effect of carbon canisters. Summary of the Invention

[0006] In order to improve the filtration effect of carbon canisters, this application provides an automotive carbon canister with multi-chamber filtration.

[0007] The automotive carbon canister with multi-chamber filtration provided in this application adopts the following technical solution: A multi-chamber automotive carbon canister includes a shell, an adsorption pipe, and a venting pipe. The shell includes a first cavity extending vertically along a first direction, the first cavity communicating with the adsorption pipe. The first cavity contains a first filter element, a second filter element, a third filter element, a first flow element, and a reset assembly. The first flow element is connected to the side wall of the first cavity. The first filter element and the second filter element are slidably connected to the side wall of the first cavity along the first direction. The first filter element and the second filter element are respectively disposed on the upper and lower sides of the first flow element, such that after sliding, the first filter element and the second filter element abut against the first flow element. The side wall of the first cavity has a guide groove, and the first filter element and the guide groove... The first end is fitted to adjust the communication area between the first end and the first cavity. The second end of the guide groove is located between the end face of the second filter and the first cavity, allowing airflow to pass through the first filter and / or the second filter and be discharged through the first flow element. The reset assembly is connected to the first cavity and the first filter respectively. The reset assembly is used to reset the first filter to close the first end. The third filter is located on the side wall of the first cavity. The second cavity is connected to the first cavity through the first flow element, and the interior of the second cavity is empty. The third cavity is connected to the second cavity and the ventilation pipe respectively. The third cavity is provided with a fourth filter.

[0008] By adopting the above technical solution, the airflow enters the first chamber through the adsorption pipe, where the first filter element filters the airflow, adsorbing gasoline vapors onto it. This reduces the hydrocarbon content of the exhaust gas as it exits the carbon canister, ensuring the exhaust gas meets environmental protection requirements. Since the first filter element can slide along a first direction within the first chamber, the airflow pressure can push it downwards along that direction, adjusting the space above it. This provides initial buffering for the airflow, reducing its velocity and ensuring sufficient contact between the airflow and the filter element. This optimizes the filtration effect and prevents excessively fast airflow, which could impair the adsorption of gasoline vapors and result in excessively high hydrocarbon content in the exhaust gas. A third filter element is provided on the circumferential sidewall of the first chamber, increasing the surface area and volume of the filter structure and further optimizing the filtration effect. When the airflow into the first chamber is sufficient or the pressure is high, the movement distance of the first filter element... The size is increased so that it can cooperate with the first end of the guide channel, and the communication area between the first end of the guide channel and the inside of the first cavity is adjusted, thereby adjusting the airflow through the first end to the bottom of the second filter element, so that the second filter element can work together with the first filter element to perform the filtering function. The first filter element can move along the first direction when the airflow is small through the setting of the reset component, so as to prevent the airflow from flowing into the guide channel, which helps the second filter element maintain good adsorption capacity. By splitting the airflow, the airflow can pass through the first filter element and the second filter element respectively, and then flow into the second cavity through the first flow element. The empty second cavity provides a buffering effect for the airflow, further reducing the airflow velocity, so that the airflow with further reduced velocity enters the third cavity, and further achieves the filtering function through the fourth filter element in the third cavity. Through multiple filtrations and velocity reduction, the adsorption of gasoline vapor in the airflow is optimized, and finally the exhaust gas is output to the atmosphere through the ventilation pipe connected to the third cavity, forming exhaust gas that meets environmental protection requirements.

[0009] Optionally, the first flow element includes a first flow section and a second flow section. A partition is provided inside the first cavity. The first flow section and the second flow section are located on the upper and lower sides of the partition, so that the airflow passing through the first filter element is discharged through the first flow section, and the airflow passing through the second filter element is discharged through the second flow section.

[0010] By adopting the above technical solution, the first cavity can be divided into two independent chambers, which are filtered and adsorbed by the first filter element and the second filter element respectively. The second filter element can only adsorb and filter gasoline vapor in the airflow when the airflow is large. Selectively adding the second filter element to the adsorption and filtration process according to the airflow size helps to maintain the good adsorption effect of the second filter element.

[0011] Optionally, the reset assembly includes at least one first elastic element, one end of which is connected to the partition, and the other end of which is connected to the first filter element.

[0012] By adopting the above technical solution, when the airflow on the first filter element decreases, the first filter plate can be reset and moved upward to the upper end near the first cavity. At this time, the first end of the guide groove is disconnected from the first cavity, and the airflow in the first cavity is filtered and adsorbed only by the first filter element and the third filter element, so that the second filter element can retain adsorption capacity.

[0013] Optionally, a plurality of second filter elements are provided, the plurality of second filter elements are arranged at intervals, and a plurality of second ends of the flow guide groove are provided, the second ends of the flow guide groove being arranged corresponding to the second filter elements.

[0014] By adopting the above technical solution, multiple second filters help to increase the number of flow dividers when the airflow is large, so as to optimize the filtration and adsorption effect of the airflow, and also help to slow down the flow speed of the airflow through multiple second filters.

[0015] Optionally, the first end is provided with a sliding plate, which is slidably connected to the port of the first end. The sliding plate is provided with a protrusion, and the first filter element cooperates with the protrusion to drive the sliding plate to move and adjust the communication area between the first end and the first cavity.

[0016] By adopting the above technical solution, the slide plate is used to close the port at the first end, so that the guide channel and the first cavity can be selectively connected by the sliding of the slide plate. The protrusion on the slide plate is used to cooperate with the first filter element, so that the first filter element can abut against and push the protrusion during the downward movement, thereby driving the slide plate to slide, so that the communication area between the first cavity and the first end gradually increases, thereby adjusting the air flow rate diverted to the lower side of the second filter element according to the total air flow rate input into the first cavity, so that the airflow can be filtered and adsorbed more fully in the first cavity.

[0017] Optionally, it also includes a fourth cavity, which is connected to the first cavity and the second cavity respectively. The fourth cavity is filled with carbon powder and has a guide plate. The guide plate is set at a preset angle to the direction in which the airflow flows out from the first flow element.

[0018] By adopting the above technical solution, the fourth chamber can further filter and adsorb the airflow based on the first chamber. After the airflow enters the fourth chamber, it can extend its flow path under the guidance of the guide plate so as to fully contact the carbon powder in the fourth chamber and optimize the filtration and adsorption effect.

[0019] Optionally, the fourth cavity is provided with a second flow member and a clearance portion. The second flow member and the clearance portion are both located on the side of the guide plate away from the first flow member. One end of the second flow member is rotatably connected to the fourth cavity. A second elastic member and a third elastic member are respectively provided on both sides of the second flow member. The two ends of the second elastic member are respectively connected to the clearance portion and the second flow member. The two ends of the third elastic member are respectively connected to the second cavity and the second flow member, so that the second flow member opens toward the fourth cavity or the second cavity.

[0020] By adopting the above technical solution, the second flow element is rotatably connected to the side wall of the fourth cavity and can be opened under the action of airflow pressure, so that the airflow can flow to the second cavity or the fourth cavity. Through the second elastic element and the third elastic element provided on both sides of the second flow element, the second flow element can be kept closed to the side wall of the fourth cavity when there is no pressure or the pressure is small. By extending the residence time of the airflow, the sufficiency of contact between the airflow and the toner is improved, thereby optimizing the filtration and adsorption effect of the airflow.

[0021] Optionally, it also includes a fifth cavity, which connects the second cavity and the third cavity, and the fifth cavity is filled with toner.

[0022] By adopting the above technical solution, the fifth chamber can further extend the flow path and residence time of the airflow in the carbon canister. Furthermore, the fifth chamber is filled with carbon powder, which can achieve the filtering and adsorption effect on the airflow, further reducing the gasoline vapor carried in the airflow and lowering the content of hydrocarbons in the exhaust gas.

[0023] Optionally, the third cavity is provided with a support member, a rotating member, a fourth elastic member, a circumferential member, and a slide rail. The rotating member is rotatably connected to the third cavity. The support member is sleeved inside the rotating member. The two ends of the fourth elastic member are respectively connected to the support member and the rotating member. The outer periphery of the support member is provided with a slider. The rotating member is provided with a guide groove. The slider cooperates with the guide groove so that the linear movement of the support member drives the rotating member to rotate. The outer periphery of the rotating member is connected to the circumferential member through a telescopic member. The lower end of the circumferential member is slidably connected to the slide rail, and the slide rail is spiral in shape.

[0024] By adopting the above technical solution, when the fourth filter element is installed in the third cavity, the end of the fourth filter element is supported by the carrier, and the slider on the carrier slides along the guide groove on the rotating part. This converts the up-and-down movement of the carrier in the first direction into the rotation of the rotating part around its own axis. Then, the rotation of the rotating part drives the circumferential part to move along the slide rail. Since the circumferential part and the rotating part are connected by a telescopic part, the distance between the circumferential part and the rotating part can change with the rotation, so that the circumferential part can limit and fix the fourth filter element with different diameters, thus improving its applicability.

[0025] Optionally, there are two third cavities, and the fourth filter element is a carbon rod, with the adsorption capacity of the carbon rod in the two third cavities being different.

[0026] By adopting the above technical solution and setting up two third chambers, the airflow can be fully filtered and adsorbed in the carbon canister. The carbon rods can reduce air resistance, allowing the airflow to be smoothly discharged from the carbon canister while being filtered and adsorbed. Furthermore, the carbon rods in the two third chambers have different adsorption capacities, which helps to reduce the heat generated during the adsorption process, thereby optimizing the filtration and adsorption effect.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. Airflow enters the first chamber through the adsorption pipe, where the first filter element filters the airflow, adsorbing gasoline vapors onto it. This reduces the hydrocarbon content of the exhaust gas as it exits the carbon canister, ensuring compliance with environmental regulations. Because the first filter element can slide along a first direction within the chamber, the airflow pressure pushes it downwards in that direction, adjusting the space above it. This provides initial buffering, reducing the airflow velocity and ensuring sufficient contact between the airflow and the filter element for optimal filtration. Excessive airflow velocity can negatively impact the adsorption of gasoline vapors, leading to high hydrocarbon content in the exhaust gas. A third filter element is located on the circumferential sidewall of the first chamber, increasing the surface area and volume of the filter structure and further optimizing filtration. When the airflow into the first chamber is sufficient or the pressure is high, the movement distance of the first filter element increases, thereby... It can cooperate with the first end of the guide channel to adjust the communication area between the first end of the guide channel and the inside of the first cavity, thereby adjusting the airflow through the first end to the bottom of the second filter element, so that the second filter element can work together with the first filter element to perform the filtering function. The first filter element can move along the first direction when the airflow is small through the setting of the reset component, so as to prevent the airflow from flowing into the guide channel, which helps the second filter element maintain good adsorption capacity. By splitting the airflow, the airflow can pass through the first filter element and the second filter element respectively, and then flow into the second cavity through the first flow element. The empty second cavity provides a buffer for the airflow, further reducing the airflow velocity. The airflow with the further reduced velocity enters the third cavity, and further achieves the filtering function through the fourth filter element in the third cavity. Through multiple filtrations and velocity reduction, the adsorption of gasoline vapor in the airflow is optimized. Finally, it is output to the atmosphere through the ventilation pipe connected to the third cavity, forming exhaust gas that meets environmental protection requirements. 2. The first chamber is divided into two independent chambers, which are filtered and adsorbed by the first filter element and the second filter element respectively. The second filter element can only adsorb and filter gasoline vapor in the airflow when the airflow is large. Selectively adding the second filter element to the adsorption and filtration process according to the airflow size helps to maintain the good adsorption effect of the second filter element. 3. When the fourth filter element is installed in the third cavity, the end of the fourth filter element is supported by the carrier, and the slider on the carrier slides along the guide groove on the rotating part. This converts the up-and-down movement of the carrier in the first direction into the rotation of the rotating part around its own axis. The rotation of the rotating part then drives the circumferential part to move along the slide rail. Since the circumferential part and the rotating part are connected by a telescopic part, the distance between the circumferential part and the rotating part can change with the rotation, so that the circumferential part can limit and fix the fourth filter elements of different diameters, thus improving applicability. Attached Figure Description

[0028] Figure 1 This is an overall schematic diagram of an automotive carbon canister with a multi-chamber filter according to an embodiment of this application.

[0029] Figure 2 This is a front view of an automotive carbon canister with a multi-chamber filter according to an embodiment of this application.

[0030] Figure 3 yes Figure 2 Cross-sectional view at point AA.

[0031] Figure 4 This is a top view of an automotive carbon canister with a multi-chamber filter according to an embodiment of this application.

[0032] Figure 5 yes Figure 4 Cross-sectional view at point BB.

[0033] Figure 6 This is a schematic diagram of the internal structure of the first cavity in an embodiment of this application.

[0034] Figure 7 This is a partial cross-sectional view of an automotive carbon canister with a multi-chamber filter according to an embodiment of this application.

[0035] Figure 8 This is a schematic diagram of the internal structure of the third cavity in an embodiment of this application.

[0036] Figure 9 This is a schematic diagram of the extension direction of the slide rail according to an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures: 100. Shell; 110. Adsorption line; 120. Desorption line; 130. Ventilation line; 1. First cavity; 11. First filter element; 111. Guide block; 12. Second filter element; 131. First flow section; 132. Second flow section; 14. Flow guide groove; 141. First end; 142. Second end; 143. Slide plate; 144. Return spring; 15. Third filter element; 16. Partition plate; 17. First elastic element; 2. Second cavity; 3. Third cavity; 31. Fourth filter element; 32. Supporting element; 33. Rotating element; 331. Guide groove; 34. Slider; 35. Enclosing element; 36. Slide rail; 37. Telescopic element; 4. Fourth cavity; 41. Guide plate; 42. Second flow element; 43. Clearance part; 44. Second elastic element; 45. Third elastic element; 5. The fifth cavity. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-9 This application will be further described in detail below. In this embodiment, unless otherwise specified, "connection," "linking," and "fixing" are interpreted broadly, including fixed connections, detachable connections, connections forming an integral structure, mechanical connections, electrical connections, direct connections, indirect connections via intermediaries, internal connections, and interactions between two components, etc., and can be understood according to the specific circumstances. Unless otherwise stated, directional terms such as "inner" and "outer" used in this application refer to the outline of the corresponding component itself, and directional terms such as "first direction" refer to... Figure 2 The X in the middle points in the direction.

[0039] like Figure 1 As shown in the figure, this application discloses an automotive carbon canister with a multi-chamber filter (hereinafter referred to as "carbon canister"). The carbon canister includes a shell 100 that serves as an internal filter, an adsorption pipe 110 connected to the shell 100, a desorption pipe 120, and a vent pipe 130. Airflow can enter the shell 100 through the adsorption pipe 110, and after being filtered and adsorbed, it is discharged to the atmosphere through the vent pipe 130 as exhaust gas. The connection position between the desorption pipe 120 and the shell 100 is determined as needed. When desorption is required, the vent pipe 130 can be used to avoid the formation of negative pressure, so that the gasoline adsorbed in the shell 100 is desorbed and used to drive the engine through the desorption pipe 120, thereby reducing gasoline waste and reducing the hydrocarbon content in the exhaust gas, thus reducing environmental pollution.

[0040] like Figure 2 and Figure 3 As shown, the housing 100 includes a first cavity 1, a second cavity 2, and a third cavity 3. The second cavity 2 is connected to both the first cavity 1 and the third cavity 3. Gasoline vapor-laden airflow generated from locations such as the fuel tank enters the housing 100 through the adsorption pipe 110, and then sequentially passes through the first cavity 1, the second cavity 2, and the third cavity 3 for filtration and adsorption. The exhaust gas is then discharged through the vent pipe 130. This arrangement of multiple cavities extends the airflow path, facilitates full contact of the airflow within the housing 100, and ensures effective adsorption. Furthermore, the overall structure is simple, easy to manufacture and implement, and readily achieves good filtration results.

[0041] like Figures 3-5 As shown, the first cavity 1 is connected to the adsorption pipe 110, and the first cavity 1 extends vertically along a first direction, allowing airflow to flow from top to bottom. The first cavity 1 is equipped with a first filter element 11, a second filter element 12, a third filter element 15, a first flow element, and a reset assembly. The first flow element is located on the side wall of the first cavity 1 and is used to connect the first cavity 1 and the second cavity 2, enabling airflow between the two cavities.

[0042] like Figure 4 and Figure 5As shown, both the first filter element 11 and the second filter element 12 are slidably connected to the side wall of the first cavity 1 along a first direction, allowing both the first filter element 11 and the second filter element 12 to move up and down along the first direction. The first filter element 11 and the second filter element 12 are respectively located on the upper and lower sides of the first flow element, that is, the first flow element is at the lowest point of the first filter element 11 when it moves down, and the first flow element is at the highest point of the second filter element 12. The first flow element protrudes from the side wall of the first cavity 1, so that the first filter element 11 and the second filter element 12 abut against the first flow element after sliding. The first flow element limits the first filter element 11 and the second filter element 12, and at the same time, prevents the sides of the first filter element 11 and the second filter element 12 from blocking the first flow element and affecting the airflow to the second cavity 2.

[0043] The first cavity 1 has a flow guide groove 14 on its side wall. The first end 141 of the flow guide groove 14 extends a certain distance along the first direction. The first filter element 11 cooperates with the first end 141 of the flow guide groove 14 so that the communication area between the first end 141 and the first cavity 1 can be adjusted by moving the first filter element 11 up and down, thereby adjusting the airflow entering the first end 141. Along the first direction, the second end 142 of the flow guide groove 14 is located between the second filter element 12 and the lower end face of the first cavity 1, which can guide the airflow entering the first cavity 1 to the area below the second filter element 12, so that the airflow can be filtered and adsorbed by the second filter element 12.

[0044] like Figures 3-5As shown, when the gas flow rate is low, the gas flow enters the first chamber 1 through the adsorption pipe 110 and is filtered by the first filter element 11 within the first chamber 1. The gasoline vapor in the gas flow is adsorbed onto the first filter element 11, reducing the hydrocarbon content of the exhaust gas as it exits the carbon canister, thus ensuring the exhaust gas meets environmental protection requirements. When the gas flow rate is high, the first filter element 11 can slide along a first direction within the first chamber 1, allowing it to be pushed downwards along that direction by the pressure of the gas flow. This downward movement of the first filter element 11 adjusts the size of the space above it, providing initial buffering for the gas flow and reducing its velocity. This ensures sufficient contact between the gas flow and the first filter element 11, optimizing the filtration effect and preventing excessively fast gas flow that could affect the adsorption of gasoline vapor by the first filter element 11, thus avoiding excessively high hydrocarbon content in the exhaust gas. On the other hand, when the airflow is large enough to cause the first filter element 11 to move downward, it drives the first end 141 to open, connecting the guide groove 14 with the first cavity 1. The airflow can then flow to the area below the second filter element 12, where it achieves filtration and adsorption. It can be understood that the airflow flowing to the area below the second filter element 12 can be airflow that has not been adsorbed by the first filter element 11; in this case, the adsorption and filtration effect is optimized by diverting the airflow. Alternatively, the airflow flowing to the area below the second filter element 12 can be airflow that has already been adsorbed by the first filter element 11; in this case, it is a secondary adsorption of the airflow, allowing it to pass through the first filter element 11 and / or the second filter element 12 before being discharged through the first flow element.

[0045] When the airflow into the first cavity 1 is sufficient or the pressure is high, the downward movement distance of the first filter element 11 increases, thereby enabling it to cooperate with the first end 141 of the guide groove 14 and adjust the communication area between the first end 141 and the interior of the first cavity 1. This, in turn, adjusts the airflow flowing through the first end 141 to the area below the second filter element 12. By sliding the first filter element 11 and the second filter element 12 up and down and adjusting the communication area between the first end 141 of the guide groove 14 and the first cavity 1, the adaptability to the pressure and airflow of the airflow entering the first cavity 1 is improved, avoiding the filtration and adsorption effect being affected by excessive airflow.

[0046] like Figure 5 and Figure 6As shown, in this embodiment, the carbon canister is placed vertically along the first direction as an example. The second filter element 12 can move upward under the push of the airflow and reset under the action of gravity; the first filter element 11 moves downward under the push of the airflow, so a reset component needs to be provided on the lower side of the first filter element 11 so that the first filter element 11 can move upward to the initial position. The reset component is connected to the first cavity 1 and the first filter element 11 respectively, so as to support and reset the first filter element 11; and the reset component can reset the first filter element 11 to close the first end 141. With the setting of the reset component, the first filter element 11 can move upward along the first direction when the airflow is small, so as to prevent the airflow from flowing into the guide channel 14, which helps the second filter element 12 maintain good adsorption capacity.

[0047] The third filter element 15 is disposed on the side wall of the first cavity 1. By arranging several third filter elements 15 on the circumferential side wall of the first cavity 1, the surface area and volume of the filter structure inside the first cavity 1 can be increased, thereby improving the filtration capacity. The first filter element 11, the second filter element 12, and the third filter element 15 can all be carbon powder covered by a sponge filter plate, or carbon powder covered by a hollow support and filter membrane. They can achieve the filtration and adsorption of gasoline vapor and can move up and down reliably and conveniently. To ensure the reliability of the sliding of the first filter element 11 and the second filter element 12, the side wall of the first cavity 1 is provided with a guide groove, and the sides of the first filter element 11 and the second filter element 12 are provided with guide blocks 111, which slide in conjunction with the guide groove. The side wall of the first cavity 1 is also provided with a limiting block, which is located below the second filter element 12 to limit the lowest position of the second filter element 12, so that the second end 142 can deliver airflow to the lower part of the second filter element 12.

[0048] like Figures 3-5 As shown, the second cavity 2 is connected to the first cavity 1 through the first flow element. The interior of the second cavity 2 is empty to provide a buffer space for the airflow. Since the airflow pressure in the housing 100 input by the adsorption pipe 110 is relatively high compared to atmospheric pressure, and the second cavity 2 can be connected to the atmosphere through the third cavity 3, the cavity pressure of the second cavity 2 is lower than that of the first cavity 1, thereby reducing the air density and helping to optimize the subsequent adsorption and filtration effect of the airflow.

[0049] The third chamber 3 is connected to the second chamber 2 and the ventilation pipe 130. A fourth filter element 31 is installed inside the third chamber 3. By splitting the airflow, the airflow passes through the first filter element 11 and the second filter element 12, and then flows through the first flow element into the second chamber 2. The empty second chamber 2 provides a buffer for the airflow, further reducing its velocity, allowing the further reduced airflow to enter the third chamber 3. The fourth filter element 31 within the third chamber 3 further filters the airflow. Through multiple filtrations and velocity reduction, the adsorption of gasoline vapors in the airflow is optimized. Finally, the exhaust gas is discharged into the atmosphere through the ventilation pipe 130 connected to the third chamber 3, forming exhaust gas that meets environmental protection requirements.

[0050] like Figure 5 and Figure 6 As shown, optionally, a plurality of second filter elements 12 are provided, spaced apart, and a plurality of second ends 142 of the flow guide groove 14 are provided, with the second ends 142 of the flow guide groove 14 corresponding to the second filter elements 12. Multiple second filter elements 12 help to increase the number of airflow diversions when the airflow rate is large, thereby optimizing the filtration and adsorption effect of the airflow, and also help to slow down the airflow velocity through the multiple second filter elements 12.

[0051] Optionally, the first flow element includes a first flow section 131 and a second flow section 132. A partition 16 is provided inside the first cavity 1. The first flow section 131 and the second flow section 132 are respectively located on the upper and lower sides of the partition 16, allowing airflow passing through the first filter element 11 to exit through the first flow section 131, and airflow passing through the second filter element 12 to exit through the second flow section 132. The partition 16 divides the first cavity 1 into two independent chambers, which are filtered and adsorbed by the first filter element 11 and the second filter element 12, respectively. Because the two chambers above and below the partition 16 are independent, the second filter element 12 only adsorbs and filters gasoline vapor in the airflow when the airflow is large. This allows the second filter element 12 to selectively participate in the adsorption and filtration process according to the airflow volume, helping to maintain a good adsorption effect. A one-way valve (not shown in the figure) is provided on the baffle 16 so that the airflow on the lower side of the baffle 16 can flow to the upper side of the baffle 16, so as to ensure that the gasoline vapor on the second filter element 12 can be desorbed and used for engine driving during desorption.

[0052] like Figure 5As shown, optionally, the reset assembly includes at least one first elastic element 17, one end of which is connected to a partition 16, and the other end of which is connected to a first filter element 11. The partition 16 provides support for the first elastic element 17 to achieve the reset of the first filter element 11. When the airflow on the first filter element 11 decreases, the first elastic element 17 can reset the first filter plate to the upper end near the first cavity 1. At this time, the first end 141 of the guide groove 14 is disconnected from the first cavity 1, and the airflow in the first cavity 1 is filtered and adsorbed only by the first filter element 11 and the third filter element 15, so that the second filter element 12 can retain adsorption capacity. The first elastic element 17 can be a spring to achieve automatic reset of the first filter element 11 when the airflow decreases.

[0053] like Figure 5 and Figure 6 As shown, optionally, the first end 141 is provided with a sliding plate 143, which is slidably connected to the port of the first end 141. The sliding plate 143 has a protrusion, and the first filter element 11 cooperates with the protrusion to move the sliding plate 143, adjusting the communication area between the first end 141 and the first cavity 1. The sliding plate 143 is used to close the port of the first end 141, so that the flow channel 14 and the first cavity 1 can be selectively connected through the sliding of the sliding plate 143. Since the flow channel 14 is opened inside the solid sidewall of the first cavity 1, airflow will not leak through the flow channel 14. A certain clearance structure is provided on the sidewall of the first cavity 1 to allow the sliding plate 143 to slide up and down. The protrusions on the slide plate 143 engage with the first filter element 11, allowing the first filter element 11 to abut against and push the protrusions during downward movement. This causes the slide plate 143 to slide, gradually increasing the communication area between the first cavity 1 and the first end 141. This allows the flow rate diverted to the lower side of the second filter element 12 to be adjusted according to the total airflow rate entering the first cavity 1, ensuring sufficient filtration and adsorption of the airflow within the first cavity 1. To ensure that the slide plate 143 can restore the seal to the first end 141 after the first filter element 11 moves upward, a return spring 144 is provided on the lower side of the slide plate 143. One end of the return spring 144 is connected to the slide plate 143, and the other end is located on the side wall of the first cavity 1. The spring force allows the slide plate 143 to move upward to seal the first end 141 when not under the pressure of the first filter element 11.

[0054] like Figures 7-9As shown, optionally, the third cavity 3 includes a support member 32, a rotating member 33, a fourth elastic member, a circumferential member 35, and a slide rail 36. The bottom of the rotating member 33 is rotatably connected to the third cavity 3. The support member 32 is fitted inside the rotating member 33. The two ends of the fourth elastic member abut against the lower ends of the support member 32 and the rotating member 33, respectively, so that the support member 32 can extend out of the rotating member 33. Since the support member 32 and the rotating member 33 need to rotate relative to each other, elastic reset is achieved only through the contact between the fourth elastic member and the support member 32, avoiding interference during rotation. A slider 34 is provided on the outer periphery of the support member 32, and a guide groove 331 is provided on the rotating member 33. The slider 34 cooperates with the guide groove 331 so that when the fourth filter element 31 is pressed down, the linear movement of the support member 32 drives the rotating member 33 to rotate. It can be understood that the support member 32 is provided with a limiting structure so that the support member 32 can only move in a straight line and will not rotate. The limiting structure can be a sliding connection structure between the limiting structure and the side wall of the third cavity 3, such as a Z-shaped connecting rod. One end of the connecting rod is connected to the bearing member 32, and the other end of the connecting rod is slidably connected to the side wall of the third cavity 3. The middle part of the connecting rod extends along the length direction of the circumferential member 35, which avoids interference with the circumferential member 35 while limiting the rotation of the bearing member 32. Since the outer periphery of the rotating member 33 is connected to the circumferential member 35 through the telescopic member 37, and the lower end of the circumferential member 35 is slidably connected to the slide rail 36, which is spiral in shape, the distance between the circumferential member 35 and the rotating member 33 can change as the rotating member 33 rotates.

[0055] When the fourth filter element 31 is installed into the third cavity 3, the end of the fourth filter element 31 is supported by the support member 32, causing the slider 34 on the support member 32 to slide along the guide groove 331 on the rotating member 33. The guide groove 331 spirals up or down along the outer circumference of the rotating member 33, thereby converting the up-and-down movement of the support member 32 in the first direction into the rotation of the rotating member 33 around its own axis. This rotation of the rotating member 33 then drives the circumferential member 35 to move along the spiral slide rail 36, changing the distance between the circumferential member 35 and the rotating member 33. Since the circumferential member 35 and the rotating member 33 are connected by a telescopic member 37, the change in the distance between them is possible. This allows the circumferential member 35 to limit and fix the fourth filter element 31 with different diameters, improving the applicability of the carbon canister. The fourth elastic element can be a spring, and the strength of the selected spring needs to be sufficient to support the fourth filter element 31. By setting the fourth elastic element, the height of the bearing 32 when idle can be set so that when the top cover is not covered, the fourth filter element 31 protrudes out of the third cavity 3, making it easy to replace the fourth filter element 31.

[0056] like Figures 7-9As shown, in this embodiment, the support member 32 is a columnar structure, and the rotating member 33 is a sleeve structure. The guide groove 331 and the slider 34 can cooperate to achieve sliding. The slide rail 36 is located at the bottom of the third cavity 3. The circumferential member 35 can be several rod-shaped structures that work together to clamp the fourth filter member 31 circumferentially. The circumferential member 35 can also be a plate-shaped structure with a certain curvature to optimize the circumferential limiting effect on the fourth filter member 31. The telescopic member 37 can be a telescopic rod to achieve telescopic movement perpendicular to the first direction.

[0057] like Figure 3 As shown, optionally, two third chambers 3 are provided, which helps to ensure that the airflow is fully filtered and adsorbed within the carbon canister. The fourth filter element 31 is a carbon rod, which reduces air resistance, allowing the airflow to smoothly exit the carbon canister while being filtered and adsorbed. The arrangement of two carbon rods ensures secondary adsorption and improves the filtration quality of the airflow. The different adsorption capacities of the carbon rods in the two third chambers 3 help to reduce the heat generated during adsorption, thereby optimizing the filtration and adsorption effect.

[0058] Optionally, the housing 100 further includes a fourth cavity 4, which connects to both the first cavity 1 and the second cavity 2, allowing the first flow element to facilitate communication between the first cavity 1 and the fourth cavity 4. The fourth cavity 4 is filled with carbon powder to further filter and adsorb the airflow based on the first cavity 1. A guide plate 41 is provided within the fourth cavity 4. The surface of the guide plate 41 forms a preset angle with the direction of airflow as it exits the first flow element. The height of the guide plate 41 is the same as the height of the fourth cavity 4, serving to obstruct and guide the airflow, preventing excessive airflow velocity within the fourth cavity 4 from affecting the adsorption and filtration effect. After entering the fourth cavity 4, the airflow path is extended under the guidance of the guide plate 41, allowing for sufficient contact with the carbon powder within the fourth cavity 4 and optimizing the filtration and adsorption effect. The specific shape and position of the guide plate 41 can be adjusted according to actual conditions to optimize the adsorption and filtration effect.

[0059] like Figure 3As shown, optionally, the fourth cavity 4 is provided with a second flow element 42 and a clearance portion 43. Both the second flow element 42 and the clearance portion 43 are located on the side of the guide plate 41 away from the first flow element, serving as the airflow outlet of the fourth cavity 4. One end of the second flow element 42 is rotatably connected to the side wall of the fourth cavity 4. A second elastic element 44 and a third elastic element 45 are respectively provided on both sides of the second flow element 42. The two ends of the second elastic element 44 are respectively connected to the clearance portion 43 and the second flow element 42, and the two ends of the third elastic element 45 are respectively connected to the second cavity 2 and the second flow element 42. This allows the second flow element 42 to open towards the fourth cavity 4 or the second cavity 2 under the action of airflow pressure, thereby allowing airflow to flow towards the second cavity 2 or the fourth cavity 4. By providing the second elastic element 44 and the third elastic element 45 on both sides of the second flow element 42, the second flow element 42 can remain closed to the side wall of the fourth cavity 4 when there is no pressure or the airflow pressure is low, thereby extending the residence time of the airflow, improving the sufficiency of contact between the airflow and the toner, and optimizing the filtration and adsorption effect of the airflow. Because the airflow directions are different during the adsorption and desorption processes, the second flow element 42 can be opened in both directions, ensuring that both adsorption and desorption functions can be reliably realized. The second flow element 42 is a plate-shaped part, the clearance part 43 is a support plate structure fixedly connected to the side wall of the fourth cavity 4, and the second elastic element 44 and the third elastic element 45 can both be springs.

[0060] Optionally, the housing 100 also includes a fifth cavity 5, which connects the second cavity 2 and the third cavity 3. The fifth cavity 5 is filled with carbon powder. The fifth cavity 5 further extends the flow path and residence time of the airflow within the carbon canister. The carbon powder filling the fifth cavity 5 can filter and adsorb the airflow, further reducing the gasoline vapor carried in the airflow and lowering the hydrocarbon content in the exhaust gas.

[0061] Understandably, the shape and dimensions of each part of the carbon canister can be adjusted as needed. The first chamber 1 and the fourth chamber 4 are connected by a first flow element, and the fourth chamber 4 and the second chamber 2 are connected by a second flow element 42. Connecting structures are provided between the second chamber 2 and the fifth chamber 5, between the fifth chamber 5 and the third chamber 3, and between the two third chambers 3. The positions of the first flow element, the second flow element 42, and other connecting structures can be adjusted as needed to ensure that the airflow sequentially passes through the first chamber 1, the fourth chamber 4, the second chamber 2, the fifth chamber 5, and the two third chambers 3. The carbon canister includes the necessary fixed connection structures to meet installation requirements.

[0062] The implementation principle of a multi-chamber automotive carbon canister according to an embodiment of this application is as follows: gasoline vapor in the fuel tank is input into the housing 100 through the adsorption pipe 110. It first passes through the first chamber 1, where the airflow flows in a first direction and is filtered by the first filter element 11 in the first chamber 1, adsorbing the gasoline vapor in the airflow. When the airflow is large, the first filter element 11 moves downward, connecting the guide groove 14 to the first chamber 1, causing the airflow to be diverted to the lower end of the first chamber 1 and filtered by the second filter element 12 to improve the filtration and adsorption effect. Subsequently, the airflow enters the fourth chamber 4 and is filtered and adsorbed by carbon powder. At this time, the airflow mainly flows perpendicular to the first direction and enters the second chamber 2 through the second flow element 42 for buffering. The buffered airflow then enters the fifth chamber 5 and is filtered and adsorbed by carbon powder again. After that, it enters the two third chambers 3 in sequence and is filtered and adsorbed by carbon rods. Finally, it is discharged into the atmosphere through the vent pipe 130. This carbon canister, by setting up multiple chambers, extends the adsorption path, ensuring sufficient filtration and adsorption of the airflow, and improving the utilization rate of carbon powder. By setting up two adsorption and filtration media, carbon powder and carbon rods, it optimizes the filtration effect, improves the adsorption quality, and reduces the hydrocarbon content in the exhaust gas, thereby ensuring that the exhaust gas emissions meet higher standards and providing a high performance guarantee for the vehicle exhaust gas treatment system.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A car carbon canister with a multi-chamber filter, characterized in that, The system includes a housing (100), an adsorption line (110), and a ventilation line (130). The housing (100) includes: A first cavity (1) extends vertically along a first direction and is connected to the adsorption pipe (110). The first cavity (1) contains a first filter element (11), a second filter element (12), a third filter element (15), a first flow element, and a reset assembly. The first flow element is connected to the side wall of the first cavity (1). The first filter element (11) and the second filter element (12) are slidably connected to the side wall of the first cavity (1) along the first direction. The first filter element (11) and the second filter element (12) are respectively disposed on the upper and lower sides of the first flow element, so that after sliding, the first filter element (11) and the second filter element (12) abut against the first flow element. The side wall of the first cavity (1) is provided with… The first filter element (11) cooperates with the first end (141) of the guide channel (14) to adjust the communication area between the first end (141) and the first cavity (1). The second end (142) of the guide channel (14) is located between the end face of the second filter element (12) and the first cavity (1) so that the airflow passes through the first filter element (11) and / or the second filter element (12) and is discharged from the first flow element. The reset assembly is connected to the first cavity (1) and the first filter element (11) respectively. The reset assembly is used to reset the first filter element (11) to close the first end (141). The third filter element (15) is located on the side wall of the first cavity (1). The second cavity (2) is connected to the first cavity (1) through the first flow member, and the interior of the second cavity (2) is empty; The third cavity (3) is connected to the second cavity (2) and the ventilation pipe (130) respectively. The third cavity (3) is provided with a fourth filter element (31). The first flow element includes a first flow section (131) and a second flow section (132). A partition (16) is provided inside the first cavity (1). The first flow section (131) and the second flow section (132) are respectively disposed on the upper and lower sides of the partition (16), so that the airflow passing through the first filter element (11) is discharged through the first flow section (131), and the airflow passing through the second filter element (12) is discharged through the second flow section (132). The reset assembly includes at least one first elastic element (17), one end of the first elastic element (17) is connected to the partition (16), and the other end of the first elastic element (17) is connected to the first filter element (11). The first end (141) is provided with a slide plate (143), which is slidably connected to the port of the first end (141). The slide plate (143) is provided with a protrusion. The first filter element (11) cooperates with the protrusion to drive the slide plate (143) to move and adjust the communication area between the first end (141) and the first cavity (1).

2. The automotive carbon canister with multi-chamber filtration according to claim 1, characterized in that: The second filter element (12) is provided in a plurality of places, and the plurality of second filter elements (12) are arranged at intervals. The second end (142) of the guide groove (14) is provided in a plurality of places, and the second end (142) of the guide groove (14) is arranged corresponding to the second filter element (12).

3. The automotive carbon canister with multi-chamber filtration according to claim 1, characterized in that: It also includes a fourth cavity (4), which is connected to the first cavity (1) and the second cavity (2) respectively. The fourth cavity (4) is filled with carbon powder and a guide plate (41) is provided inside the fourth cavity (4). The guide plate (41) is set at a preset angle with the direction of airflow from the first flow member.

4. The automotive carbon canister with multi-chamber filtration according to claim 3, characterized in that: The fourth cavity (4) is provided with a second flow member (42) and a clearance part (43). The second flow member (42) and the clearance part (43) are both located on the side of the guide plate (41) away from the first flow member. One end of the second flow member (42) is rotatably connected to the fourth cavity (4). The two sides of the second flow member (42) are respectively provided with a second elastic member (44) and a third elastic member (45). The two ends of the second elastic member (44) are respectively connected to the clearance part (43) and the second flow member (42). The two ends of the third elastic member (45) are respectively connected to the second cavity (2) and the second flow member (42), so that the second flow member (42) opens toward the fourth cavity (4) or the second cavity (2).

5. The automotive carbon canister with multi-chamber filtration according to claim 1, characterized in that: It also includes a fifth cavity (5), which is used to connect the second cavity (2) and the third cavity (3), and the fifth cavity (5) is filled with carbon powder.

6. The automotive carbon canister with multi-chamber filtration according to claim 1, characterized in that: The third cavity (3) is provided with a support member (32), a rotating member (33), a fourth elastic member, a circumferential member (35), and a slide rail (36). The rotating member (33) is rotatably connected to the third cavity (3). The support member (32) is sleeved inside the rotating member (33). The two ends of the fourth elastic member are respectively connected to the support member (32) and the rotating member (33). The outer periphery of the support member (32) is provided with a slider (34). The rotating member (33) is provided with a guide groove (331). The slider (34) cooperates with the guide groove (331) so that the linear movement of the support member (32) drives the rotating member (33) to rotate. The outer periphery of the rotating member (33) is connected to the circumferential member (35) through a telescopic member (37). The lower end of the circumferential member (35) is slidably connected to the slide rail (36). The slide rail (36) is spiral.

7. The automotive carbon canister with multi-chamber filtration according to claim 1, characterized in that: The third cavity (3) is provided in two parts, and the fourth filter element (31) is a carbon rod. The adsorption capacity of the carbon rod in the two third cavities (3) is different.

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