Carbon tank and fuel evaporation control system

Abstract

The utility model belongs to the technical field of air inlet systems or air purification systems, and relates to a carbon tank and a fuel evaporation control system. The carbon tank comprises a shell which is provided with an adsorption opening, a desorption opening and an atmosphere opening; the adsorption material is arranged in the shell and is used for adsorbing fuel steam; the rotating part is arranged on the side, close to the atmosphere vent, in the shell; wherein the rotating part is provided with a ventilation part, and when air entering from the atmosphere ventilation port passes through the ventilation part, the rotating part can be driven to rotate. The fuel oil molecule desorption device can concentrate air flow and increase the flow speed in the desorption process, and circularly clean the adsorption material, so that the efficiency and the effect of fuel oil molecule desorption can be improved, and desorption can be more fully carried out in a limited desorption time period.

Description

Technical Field

[0001] The utility model belongs to the technical field of air intake systems or air purification systems, and relates to a carbon canister and a fuel evaporation control system. Background Art

[0002] Existing cars or motorcycles that use fuel as energy usually have a power system, a fuel supply system for supplying fuel to the power system, and a fuel evaporation pollution control system for controlling the fuel vapor generated by the fuel supply system to prevent it from being discharged into the atmosphere. Among them, the fuel evaporation pollution control system usually includes a charcoal canister filled with adsorbents such as activated carbon. The charcoal canister has an air vent, an adsorption port, and a desorption port. The air vent is connected to the outside, the adsorption port is connected to the fuel tank, and the desorption port is connected to the engine intake manifold. The connection between the desorption port and the intake manifold is controlled by a solenoid valve. The gasoline vapor in the fuel tank enters the charcoal canister through the adsorption port, and the activated carbon adsorbs the fuel molecules therein to prevent them from entering the atmosphere; when the solenoid valve is opened, the charcoal canister enters the desorption process. Under the negative pressure of the intake manifold, air enters the charcoal canister from the air vent, takes away some of the fuel molecules adsorbed by the activated carbon, and is input to the engine through the desorption port to participate in combustion.

[0003] The emission control capability of the fuel evaporation pollution control system is related to the cleaning capability of the activated carbon in the charcoal canister. The total amount of air used to clean the charcoal canister during engine operation is considered constant. The existing charcoal canister does not reach the ideal state most of the time, which can easily lead to the failure to fully desorb the fuel molecules adsorbed on the activated carbon. The adsorption performance of the activated carbon gradually decreases during use. After long-term use, the adsorption performance of the activated carbon is severely reduced, and the fuel molecules will overflow and cause air pollution. Summary of the invention

[0004] The utility model is designed to solve the above problems and aims to provide a carbon canister capable of improving desorption efficiency and a fuel evaporation control system using the carbon canister. The utility model adopts the following technical solutions:

[0005] The utility model provides a carbon canister, which is arranged in a fuel evaporation control system of a fuel vehicle having a fuel tank and an engine, and is used at least to absorb the fuel vapor generated by the fuel in the fuel tank.

[0006] The oil vapor has the following characteristics: it includes: a shell having an adsorption port connected to the fuel tank, a desorption port connected to the engine, and an air vent connected to the outside; an adsorbent arranged inside the shell for adsorbing fuel vapor; and a rotating component arranged on a side of the shell near the air vent; wherein the rotating component has a vent portion, and the air entering from the air vent can drive the rotating component to rotate when passing through the vent portion.

[0007] In the carbon canister provided by the present utility model, it may further have the following features: Among them, the rotating component further has: a rotating body with an installation groove formed in the middle; a partition portion provided on the rotating body and adjacent to the ventilation portion; and a bearing installed in the installation groove and containing a connecting shaft connected to the housing; the ventilation portion is at least one ventilation opening formed on the rotating body.

[0008] In the carbon canister provided by the present utility model, it may further have the following features: Among them, the partition portion includes several flow guiding vanes, and ventilation openings are formed between the flow guiding vanes. The ventilation openings have an inlet end for air to enter and an outlet end for air to exit, and the flow guiding vanes are inclined from the inlet end to the outlet end.

[0009] In the carbon canister provided by the present utility model, it may further have the following features: Among them, the housing includes: a receiving shell with one end being the housing opening end and the other end being the bottom plate end with a bottom plate, and having an inner cavity for accommodating the adsorption material; an end cover installed on the housing opening end and provided with an adsorption port and a desorption port; and a cover installed on the bottom plate end and provided with an atmospheric vent. The rotating component is arranged on the side of the bottom plate facing away from the adsorption material and is covered by the cover.

[0010] In the carbon canister provided by the present utility model, it may further have the following features: Among them, several air passing openings are distributed on the bottom plate, and an annular groove is formed between the side of the bottom plate facing the rotating component and the inner wall of the receiving shell. An annular boss protruding from the side of the rotating component facing the bottom plate extends into the annular groove, and there is a clearance fit between the annular groove and the annular boss.

[0011] In the carbon canister provided by the present utility model, it may further have the following features: Among them, the receiving shell, the desorption port, the atmospheric vent and the rotating component are coaxially arranged.

[0012] In the carbon canister provided by the present utility model, it may further have the following features: Among them, a partition plate is arranged in the inner cavity, and the partition plate is used to divide the end of the inner cavity close to the bottom plate into at least two accommodation channels. One end of the partition plate is integrally connected to the bottom plate, and the other end extends towards the housing opening end and has a gap with the housing opening end. The accommodation channels are filled with the adsorption material.

[0013] In the carbon canister provided by the present utility model, it may further have the following features: Among them, a top plate is further arranged at the housing opening end. The top plate is provided with holes for gas to pass through. A space for accommodating the adsorption material is formed between the top plate and the bottom plate, and gaskets are respectively arranged between the bottom plate and the adsorption material and between the top plate and the adsorption material.

[0014] In the carbon canister provided by the present utility model, the following features may further be included: A partition portion is provided inside the end cap, and the partition portion divides the interior of the end cap into a first cavity and a second cavity. The first cavity communicates with the desorption port, and the second cavity communicates with the adsorption port. A spring is pressed between the partition portion and the top plate. One end of the spring is fixed by a spring fixing portion formed at one end of the partition portion close to the top plate, and a fixing groove for fixing the other end of the spring is provided on the side of the top plate facing the partition portion.

[0015] The present utility model also provides a fuel evaporation control system, which has the following features and at least includes: a carbon canister, where the carbon canister is the carbon canister as described above.

[0016] Function and effect of the utility model

[0017] According to the carbon canister and the fuel evaporation control system involved in the present utility model, since a rotating component is provided on the side of the housing close to the atmosphere vent, and the rotating component has a ventilation portion, during the desorption process, the air entering from the atmosphere vent can drive the rotating component to rotate when passing through the ventilation portion, concentrating the air flow and increasing the flow rate, and circulating and cleaning the adsorption material, thereby improving the desorption efficiency and effect of fuel molecules, enabling more sufficient desorption within a limited desorption time period, avoiding the cumulative problem caused by insufficient desorption of the adsorption material, and increasing the recycling efficiency of the adsorption material. Description of the drawings

[0018] Figure 1 is a perspective view of the carbon canister in the embodiment of the present utility model.

[0019] Figure 2 is a front view of the carbon canister in the embodiment of the present utility model.

[0020] Figure 3 is Figure 2 a sectional view taken along the A-A direction of

[0021] Figure 4 is Figure 3 a sectional view taken along the B-B direction of

[0022] Figure 5 is an exploded view of the structure in the embodiment of the present utility model.

[0023] Figure 6 is a schematic diagram of the structure of the end cap in the embodiment of the present utility model.

[0024] Figure 7 is a schematic diagram of the structure of the top plate in the embodiment of the present utility model.

[0025] Figure 8 is a schematic diagram of the structure of the accommodation shell in the embodiment of the present utility model.

[0026] Figure 9 It is a schematic structural diagram of the accommodation shell from another perspective in the embodiment of the present utility model.

[0027] Figure 10 Schematic structural diagram of the rotating component in the embodiment of the present utility model.

[0028] Figure 11 It is a schematic structural diagram of the rotating component from another perspective in the embodiment of the present utility model.

[0029] Reference numerals: carbon canister 100, housing 10, accommodation shell 11, opening end 111 of the housing, bottom plate end 112, end cover 12, adsorption tube part 121, desorption tube part 122, partition part 123, first cavity 124, second cavity 125, spring fixing part 126, cover 13, atmosphere vent pipe 131, adsorption port 14, desorption port 15, bottom plate 16, spoke 161, rib 162, air passage hole 163, annular groove 164, atmosphere vent 17, top plate 18, fixing groove 181, spoke 182, hole 183, partition plate 19, adsorption material 20, rotating component 30, rotating body 31, bearing 33, connecting shaft 331, isolation part 34, flow guiding vane 341, ventilation part 35, balance rib 36, annular boss 37, spring 40, gasket 61, gasket 62. Detailed implementation manners

[0030] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the carbon canister and fuel evaporation control system of the present utility model will be specifically described below in conjunction with the embodiments and the accompanying drawings.

[0031] <Embodiment>

[0032] Taking an automobile as an example, this embodiment provides a fuel evaporation control system for a fuel vehicle. A fuel vehicle generally includes a power system, a fuel supply system and a fuel evaporation control system. The power system includes an engine, etc.; the fuel supply system includes a fuel tank, a fuel filter, a carburetor, etc., for supplying fuel to the engine; the fuel evaporation control system is used to control the fuel vapor emitted by the fuel supply system, and it includes a carbon canister, pipelines respectively used to connect the carbon canister with the fuel tank and the intake chamber, a control valve, etc.

[0033] When refueling the fuel tank of an automobile, the fuel vapor content will increase and thus enter the carbon canister; when the automobile is running, the temperature of the fuel tank rises, the fuel liquid in the fuel tank sloshes, and when the vehicle stops and shuts off the engine, the evaporation of the gasoline in the fuel tank will also cause fuel vapor to enter the carbon canister. When the vehicle is restarted after stopping and shutting off the engine, the carbon canister enters the desorption process.

[0034] Figure 1 It is a three-dimensional view of the carbon canister in the embodiment of the present utility model; Figure 2 It is a front view of the carbon canister in the embodiment of the present utility model;Figure 3 and Figure 4 are cross-sectional views of the carbon canister in the embodiments of the present utility model; Figure 5 is an exploded view of the structure in the embodiments of the present utility model.

[0035] As Figures 1 to 5 shown, the carbon canister 100 includes a housing 10, an adsorption material 20, and a rotating member 30. The adsorption material 20 is disposed inside the housing 10 and is used for adsorbing fuel vapor. The rotating member 30 is rotatably disposed inside the housing and can be used to accelerate air flow. Among them, the housing 10 includes a receiving housing 11, an end cap 12, and a cover 13. In this embodiment, the receiving housing 11 is in the shape of a hollow cylinder and is made of plastic. One end thereof is the housing opening end 111, and an end cap 12 is installed on the housing opening end 111. The end cap 12 is provided with an adsorption pipe portion 121 and a desorption pipe portion 122. The adsorption pipe portion 121 is in the shape of a circular tube, and its axial direction is consistent with the axial direction of the receiving housing 11. The adsorption pipe portion 121 has a through hole that penetrates along its axial direction and is communicated with the inside of the receiving housing 11. The outer end portion of the adsorption pipe portion 121 forms an adsorption port 14 that is communicated with the fuel tank. The desorption pipe portion 122 is in the shape of a cylinder, and its axial direction is parallel to the axial direction of the adsorption pipe portion 121. The desorption pipe portion 122 has a through hole that penetrates along its axial direction and is communicated with the inside of the receiving housing 11. The outer end portion of the desorption pipe portion 122 forms a desorption port 15 that is communicated with the intake manifold of the engine, and the diameter of the desorption pipe portion 122 is smaller than the diameter of the adsorption pipe portion 121. The adsorption pipe portion 121 and the desorption pipe portion 122 are arranged radially along the end cap 12.

[0036] In this embodiment, the outer diameter of the adsorption pipe portion 121 is 15.82 ± 0.1 mm, and the inner diameter is 11.8 ± 0.1 mm; the outer diameter of the desorption pipe portion 122 is 11.8 ± 0.1 mm, and the inner diameter is 7.8 ± 0.1 mm. And chamfers (R2 or above) are designed and strengthened on the outer sides of the joints between the adsorption pipe portion 121 and the receiving housing 11 and between the desorption pipe portion 122 and the receiving housing 11. Chamfers (R4 or above) are also provided on the inner sides of the adsorption pipe portion 121 and the desorption pipe portion 122 to reduce the desorption resistance. The above-mentioned dimension design enables the carbon canister 10 to meet the standards higher than the National VI (Emission Limits and Measurement Methods for Light-Duty Vehicles (China Phase VI)), and at the same time, on the basis of meeting the foregoing standards, the size of the carbon canister can be greatly reduced, and the filling amount of the adsorption material can be reduced, thereby reducing the production cost.

[0037] Figure 6 is a structural schematic diagram of the end cap in the embodiments of the present utility model.

[0038] As Figure 6As shown, the end cap 12 is a circular cap-shaped structure adapted to the open end of the receiving shell 11 and can be fitted and installed at the open end of the receiving shell 11. A cavity is formed inside the end cap 12, and a substantially annular partition portion 123 is provided. The partition portion 123 divides the cavity of the end cap 12 into a first cavity 124 and a second cavity 125, and the first cavity 124 and the second cavity 125 are arranged inside and outside. Among them, as Figure 3 and Figure 4 shown, the first cavity 124 is communicated with the through hole in the desorption pipe portion 122 and the desorption port 15, and the second cavity 125 is communicated with the through hole in the adsorption pipe portion 121 and the adsorption port 14. The arrangement of the partition portion 123 can semi-separate the adsorption port 14 from the desorption port 15, so that the fuel vapor flowing in through the adsorption port 14 can fully react with the adsorption material inside the receiving shell 11 and is not likely to directly flow out from the adjacent desorption port 15. In addition, in this embodiment, the inner diameter of the first cavity 124 gradually expands from the end close to the desorption pipe portion 122 to the end far from the desorption pipe portion 122, which can allow the fuel vapor flowing in from the desorption port 15 to enter the adsorption material inside the receiving shell 11 in a larger range for full reaction.

[0039] Figure 7 is a structural schematic diagram of the top plate in the embodiment of the present utility model.

[0040] As Figure 3 and Figure 4 shown, a top plate 18 is further provided at the open end 111 of the shell. The top plate 18 is used to separate the cavity of the end cap 12 from the inner cavity of the receiving shell 11. A spring 40 is pressed between the end cap 12 and the top plate 18. One end of the spring 40 is fixed by a spring fixing portion 126 formed by the inner contraction of the partition portion 123 at the end close to the top plate 18, and a fixing groove 181 for fixing the other end of the spring 40 is formed on the side of the top plate 18 facing the end cap 12. One end of the spring 40 is sleeved on the outer periphery of the spring fixing portion 126, and the other end extends into and is fixed in the fixing groove 181. As Figure 7 shown, the top plate 18 is a concentric circular plate-shaped structure. Centered on the central circle in the middle, a plurality of spokes 182 connecting to the outer circle are formed in the circumferential direction, and it has an inner and outer concentric circle structure. The end of the circular middle part located inside, facing the inner cavity of the receiving shell 11, is recessed to form the above-mentioned fixing groove 181 for fixing the spring 40. A plurality of holes 183 are separated between adjacent spokes 182 and the concentric circles. These holes are used for gas to pass through to realize the gas circulation between the cavity of the end cap 12 and the inner cavity of the receiving shell 11. By providing the spring 40, the top plate 18 can be pressed tightly in the receiving shell 11, so as to freely compensate for the loose gap of the carbon powder and keep the carbon powder compact.

[0041] Figure 8 and Figure 9It is a structural schematic diagram of the accommodation shell in the embodiment of the present utility model.

[0042] The other end of the accommodation shell 11 is the bottom plate end 112, and a bottom plate 16 is integrally arranged in the bottom plate end 112 and the accommodation shell 11. The bottom plate 16 corresponds to the top plate 18, and a space for accommodating the adsorption material 20 is formed between the two. Gaskets 61 and 62 are respectively arranged between the bottom plate 16 and the top plate 18 and the adsorption material 20. As Figure 8 shown, the bottom plate 16 is a circular plate-like structure integrally formed on the inner cavity of the accommodation shell 11. Its structure is similar to that of the top plate 18. It also has a number of spokes 161 radiating from the central circle in the middle to the circumferential direction. A number of arc-shaped rib strips 162 are arranged between the spokes 161, and a number of arc-shaped air holes 163 are formed between the rib strips. These air holes 163 can allow air to pass through.

[0043] As Figure 9 shown, a partition plate 19 for dividing at least two accommodation channels is also integrally arranged in the inner cavity in the middle of the accommodation shell 11. One end of the partition plate 19 is connected to the bottom plate 16 to form an integral body, and the other end extends towards the shell opening end 111. All accommodation channels are filled with the adsorption material 20. The cross-section of the partition plate 19 can have various shapes, such as a straight shape, a Y shape, a cross shape, etc. When the cross-section of the partition plate 19 is a straight shape, the accommodation channels are two; when the cross-section of the partition plate 19 is a Y shape, the accommodation channels are three (as Figure 9 ); when the cross-section of the partition plate 19 is a cross shape, the accommodation channels are four; and so on. The method of using multiple accommodation channels makes the inner cavity near the bottom plate 16 form a sub-cavity design, which can reduce the cross-sectional area of the channel during the desorption process. When the desorption flow rate of the engine is certain, it can increase the flow rate of the air flow through a single cavity, thereby improving the desorption efficiency and effect of the fuel molecules, so that desorption can be more fully carried out within a limited desorption time period. Since the other end of the partition plate 19 only extends towards the shell opening end 111 and does not completely extend to the shell opening end 111, that is, as Figure 9 shown, there is still a certain distance between the end of the other end of the partition plate 19 and the shell opening end 111, so that the inner cavity of this part at the shell opening end 111 is not separated, and the adsorption material 20 is also filled here (see Figure 4 ), so that the cross-sectional area of the adsorption material 20 at this end is large. During the adsorption process, it can avoid the desorption phenomenon of the oil and gas being pulled by the adsorption flow rate due to too fast adsorption flow rate, accelerate the migration of the oil and gas, and discharge it into the atmosphere.

[0044] As Figure 3 and Figure 4As shown, a cover 13 is installed on one end of the accommodation shell 11 away from the shell opening end 111 (i.e., the bottom plate end 112). The cover 13 includes a cover body that can be generally regarded as a funnel-shaped cover. The cover body has a large-diameter end and a small-diameter end. The large-diameter end is connected to the accommodation shell 11, and an atmospheric vent pipe 131 is provided at the small-diameter end. The atmospheric vent pipe 131 is cylindrical, and its axis is consistent with the axis of the accommodation shell 11. The atmospheric vent pipe 131 has a through hole that penetrates along its axis and communicates with the inside of the accommodation shell 11. The outer end of the atmospheric vent pipe 131 forms an atmospheric vent 17 that communicates with the outside. The atmospheric vent pipe 131 is at the small-size end of the funnel shape, which can make the air entering from the atmospheric pipe part 172 have a larger contact area with the adsorbent material, thereby accelerating the reaction rate. An installation space is formed between the cover 13 and the bottom plate 16, and the rotating member 30 is installed in this installation space.

[0045] Figure 10 and Figure 11 is a structural schematic diagram of the rotating member in the embodiment of the present utility model.

[0046] As Figure 10 and Figure 11 shown, the rotating member 30 has a rotating body 31. A mounting groove is recessed downward in the middle of the side of the rotating body 31 facing the adsorbent material 20. A bearing 33 is installed in the mounting groove. There is a connecting shaft 331 in the middle of the bearing 33. One end of the connecting shaft 331 is connected to the bearing 33, and the other end is connected to the bottom plate 16, thereby installing the rotating body 31 in the shell 10. Adjacent isolation parts 34 and ventilation parts 35 are provided on the rotating body 31. The ventilation part 35 is at least one ventilation opening opened on the rotating body 31. The area of the rotating body 31 except for the ventilation openings can be classified as the isolation part 34. The isolation part 34 also includes several guide vanes 341. Ventilation openings are formed between the guide vanes 341. The ventilation openings have an inlet end for air to enter and an outlet end for air to exit. The guide vanes 341 are inclined from the inlet end to the outlet end.

[0047] In this embodiment, as Figure 10 and Figure 11As shown, the rotating body 31 is generally disc-shaped as a whole, the air vents are in the shape of fan blades, and there are two of them. The rest are isolation parts 34 for isolating air. The area occupied by the isolation parts 34 on the rotating body 31 is much larger than the area occupied by the air vents on the rotating body 31. Therefore, the air entering from the atmosphere vent 17 cannot pass through the large-area isolation parts, but is concentrated and passes through the air vents, thereby driving the rotating body 31 to rotate, increasing the air flow rate, and circulating and cleaning the adsorbed material. On the surface of the side of the rotating body 31 facing the cover 13 (the side where the atmosphere vent is located), there are also n radially extending spokes 311 from the center to the outside. A fan-shaped area 312 is formed between adjacent spokes 311. One of the fan-shaped areas is provided with an air vent, and the rest are isolation parts 34. Among them, n≥2. In this embodiment, as Figure 11 shown, n = 6, and the entire rotating body 31 is divided into 6 fan-shaped areas. An air vent part 35 is provided in one of the fan-shaped areas, and balance ribs 36 parallel to the spokes are also provided in the remaining 5 fan-shaped areas to ensure the stability of the rotating body 31 during rotation.

[0048] As Figure 8 shown, an annular groove 164 is formed between the side of the bottom plate 16 facing the rotating member 30 and the inner wall of the receiving shell 11. As Figure 10 shown, a circular boss 37 extending into the annular groove 164 is formed on the side of the outer edge of the rotating body 31 of the rotating member 30 facing the bottom plate, so that the rotating body 31 can be limited within this range during rotation to avoid detachment. At the same time, a clearance fit is provided between the annular groove 164 and the circular boss 37 to ensure the normal rotation of the rotating body 30.

[0049] The adsorbed material 20 is carbon powder, which has high adsorption properties and can adsorb a large amount of gases, organic and inorganic substances, and can also adsorb fuel molecules well. The adsorption principle of the adsorbed material 20 is to adsorb oil and gas molecules through microscopic voids, and there are sizes of microscopic voids, which are defined as macropores, mesopores, and micropores in engineering. Macropores are relatively easy to adsorb and desorb, while mesopores and micropores are easy to adsorb but not easy to desorb. Therefore, increasing the desorption flow rate is beneficial to the detachment of oil and gas molecules in mesopores and micropores.

[0050] The adsorbed material 20 is filled in the receiving channel, and gaskets 61 and 62 are provided at both ends of the adsorbed material 20, that is, between the adsorbed material 20 and the bottom plate 16 and between the adsorbed material 20 and the top plate 18. In this embodiment, the gaskets 61 and 62 are barrier cotton. The function of the barrier cotton is to block the adsorbed material in the filling cavity and has air permeability, thereby blocking and limiting the carbon powder to prevent its leakage. Due to the setting of the partition plate 19, one end of the partition plate 19 is directly connected to the bottom plate 16 to form an integral structure with the bottom plate 16 and the receiving shell 11. The adsorbed material 20 here is divided into multiple parts. Therefore, the gasket 61 at the end of the bottom plate 16 is fan-shaped (asFigure 11 As shown in the figure, the number is the same as that of the accommodation channels, and each accommodation channel is provided with a gasket 61. The other end of the partition plate 19 is at a certain distance from the opening end 111 of the housing. Here, the adsorption material 20 is not separated. Therefore, the gasket 62 at this end of the top plate 18 is circular.

[0051] In addition, in this embodiment, as Figure 3 and Figure 4 shown, the accommodation shell 11, the desorption port 15, the vent port 17 and the rotating member 30 are coaxially arranged, which ensures the path consistency of the desorption airflow and ensures the balanced force on the rotating member 30 during operation.

[0052] The adsorption and desorption paths and principles of the present utility model are as follows:

[0053] During the adsorption process, the fuel vapor enters the second cavity 125 from the adsorption port 14, and then enters the interior of the accommodation shell 11 along the holes 183 on the top plate 18. At first, since the adsorption material here is not separated, when the oil and gas enter the adsorption material, the cross-section of the adsorption material is large and the flow rate is low. Then, it is dispersed into each accommodation channel in the area of the subsequent partition plate 19. After being adsorbed by the adsorption material 20, it enters the cover 13 along the air holes 163 on the bottom plate 16, and finally is discharged to the external atmosphere along the vent port 172a. The multi-channel method can greatly reduce the adsorption resistance, avoid refueling nozzle jumping, and at the same time, the smaller adsorption flow rate increases the adsorption amount of the carbon canister, which is equivalent to reducing the aspect ratio of the carbon canister during the adsorption process (in the prior art, usually, the aspect ratio of the accommodation shell of the carbon canister is increased to improve the desorption efficiency. Increasing the aspect ratio will also cause an increase in the adsorption resistance. When the aspect ratio breaks through the critical value, it will cause refueling nozzle jumping, and the fuel molecules will quickly migrate into the atmosphere, causing air pollution. In addition, since the total amount of air for cleaning the carbon canister remains unchanged, increasing the activated carbon filling amount will cause the fuel molecules adsorbed on the activated carbon not to be fully desorbed, and the adsorption performance of the activated carbon will gradually decrease during use. After long-term use, due to the serious decline in the adsorption performance of the activated carbon, the fuel molecules will overflow and cause air pollution).

[0054] During the desorption process, when the air entering from the vent port 17 passes through the rotating member 30, since the rotating member 30 is provided with fan-shaped vent holes, these air will push the rotating partition to rotate, and the airflow passing through the vent holes is concentrated, increasing the flow rate, and will quickly enter the accommodation channel. After being desorbed by the adsorption material (that is, taking away the fuel molecules intercepted by the adsorption material during the adsorption process during the gas flow), it is sucked into the intake manifold from the desorption port 15, and then reaches the engine cylinder through the intake manifold.

[0055] In this embodiment, the rotating component 30 mainly isolates the air flow, causing the air flow to concentrate and pass through the fan-shaped ventilation openings, so that the flow rate drives the rotation of the rotating component 30, achieving concentrated and accelerated air flow. In addition, the sub-chamber design near the end of the cover 13 in the inner cavity of the accommodation shell 11 reduces the cross-sectional area of one end of the adsorption material. When the desorption flow rate of the engine is constant, the flow rate of the air through a single cavity increases. The combination of the above two can simultaneously solve the problems that in the adsorption process, a large cross-sectional area and low flow rate are required to improve the adsorption capacity, and in the desorption process, a high flow rate is required to clean the adsorption material thoroughly to improve the desorption capacity.

[0056] Functions and effects of this embodiment

[0057] According to the charcoal canister and fuel evaporation control system involved in the above embodiment, since the rotating component 30 is provided on one side of the housing 10 near the atmosphere vent 17, and the rotating component 30 has a ventilation portion 35, during the desorption process, the air entering from the atmosphere vent 17 can drive the rotating component 30 to rotate when passing through the ventilation portion 35, concentrating the air flow and increasing the flow rate, and circulatingly cleaning the adsorption material 20, thereby improving the desorption efficiency and effect of fuel molecules, enabling more sufficient desorption within a limited desorption time period, avoiding the cumulative problem caused by insufficient desorption of the adsorption material, and increasing the recycling efficiency of the adsorption material.

[0058] In the embodiment, the rotating component has a disk-shaped rotating body 31, and a fan-shaped ventilation opening is provided on the rotating body 31, with the rest serving as the isolation portion 34, enabling the air to be concentrated at the ventilation opening and pass through the ventilation opening with the assistance of the isolation portion 34, causing the rotating body 31 to rotate self-driven by the air to accelerate the air flow rate, without the need for an additional driving structure.

[0059] In the embodiment, a partition plate 19 is provided inside the accommodation shell 11. One end of the partition plate 19 is connected to the bottom plate 16 near the atmosphere vent 17, and there is a distance between the other end and the opening end 111 of the housing near the adsorption port 14, causing the adsorption material 20 to be divided into multiple parts at the end near the atmosphere vent 17, reducing the adsorption cross-section, thereby increasing the gas flow rate, which is beneficial for the desorption process; while the adsorption material 20 at the end near the adsorption port 14 is not divided and still maintains a large cross-section, enabling better adsorption of fuel molecules during the adsorption of oil and gas.

[0060] In the embodiment, the accommodation shell 11, the desorption port 14, the atmosphere vent 17, and the rotating component 30 are coaxially arranged, ensuring the consistency of the desorption air flow path and the balanced force on the rotating component 30 during operation.

[0061] The above embodiments are only preferred embodiments of the present utility model, and thus do not limit the patent protection scope of the present utility model. Any equivalent unit transformation made by using the content of the specification and drawings of the present utility model, directly or indirectly applied in other related technical fields, shall be included in the protection scope of the present utility model by the same token. For example:

[0062] 1) In the above embodiment, the separator 19 is in a Y shape as shown in the attached drawings. In actual situations, it can also be made into a straight shape, a cross shape, a rice shape, etc. according to needs.

[0063] 2) In the above embodiment, the carbon canister is described with a fuel vehicle as the usage scenario for the embodiment. In actual situations, the above carbon canister can also be used in other occasions that require adsorption and desorption, such as scenarios like factory waste gas emissions.

[0064] 3) In the above embodiment, the adsorption material filled in the housing is a kind of carbon powder. In an alternative solution, the adsorption material can also adopt a mixed filling scheme. For example, BAX1100 carbon powder is filled on the side of the air vent to the atmosphere, and BAX1500 carbon powder is filled on the side of the adsorption hole and the desorption hole. The two kinds of carbon powders are isolated by a sponge, so that the carbon canister can meet the specified emission limits while having good working ability.

Claims

1. A carbon canister, characterized in that: include: The shell has an adsorption port, a desorption port and an air vent; Adsorbent material, arranged inside the shell; as well as A rotating component is arranged inside the housing at a side close to the ventilation port; Wherein, the rotating component has a ventilation part, and the air entering from the ventilation air port can drive the rotating component to rotate when passing through the ventilation part.

2. The carbon canister according to claim 1, characterized in that: in, The rotating component also has: The rotating body has a mounting slot in the middle; an isolation portion, disposed on the rotating body and adjacent to the vent portion; and a bearing, mounted in the mounting groove and comprising a connecting shaft connected to the housing; The vent portion is at least one vent opening provided on the rotating body.

3. The carbon canister according to claim 2, characterized in that: in, The isolation part includes a plurality of guide plates, and the vent is formed between the guide plates. The vent has an inlet end for air to enter and an outlet end for air to exit. The guide plates are arranged obliquely from the inlet end to the outlet end.

4. The carbon canister according to any one of claims 1 to 3, It is characterized in that Wherein, the housing comprises: A containing shell, one end of which is a shell opening end, the other end of which is a bottom plate end having a bottom plate, and has an inner cavity for containing the adsorbent; an end cover, mounted on the open end of the shell and provided with the adsorption port and the desorption port; and A cover is installed at the end of the bottom plate and is provided with the vent. The rotating component is arranged on a side of the bottom plate facing away from the adsorbent material and is covered by the cover.

5. The carbon canister according to claim 4, characterized in that: in, The bottom plate is provided with a plurality of air holes for allowing air to pass through, and an annular groove is formed between the side of the bottom plate facing the rotating component and the inner wall of the containing shell. The rotating component protrudes from the side of the bottom plate toward the bottom plate to form an annular boss extending into the annular groove, and the annular groove and the annular boss are clearance-matched.

6. The carbon canister according to claim 4, characterized in that: in, The containing shell, the desorption port, the air vent and the rotating component are coaxially arranged.

7. The carbon canister according to claim 4, characterized in that: in, The inner cavity is provided with a partition plate, which is used to divide the inner cavity at one end close to the bottom plate into at least two accommodating channels. One end of the partition plate is connected to the bottom plate to form a whole, and the other end extends toward the opening end of the shell and has a gap between the opening end of the shell. The accommodating channel is filled with the adsorbent.

8. The carbon canister according to claim 7, characterized in that: in, The shell opening end is also provided with a top plate, which is provided with holes for gas to pass through, a space for accommodating the adsorbent is formed between the top plate and the bottom plate, and gaskets are respectively provided between the bottom plate and between the top plate and the adsorbent.

9. The carbon canister according to claim 8, characterized in that: in, A partition is provided inside the end cover, and the partition divides the inside of the end cover into a first cavity and a second cavity, wherein the first cavity is communicated with the desorption port, and the second cavity is communicated with the adsorption port; A spring is pressed between the partition and the top plate, a spring fixing portion for fixing one end of the spring is formed at one end of the partition close to the top plate, and a fixing groove for fixing the other end of the spring is formed on one side of the top plate facing the partition.

10. A fuel evaporation control system, characterized in that: At least: Carbon canister, Wherein, the carbon canister is the carbon canister described in any one of claims 1-9.

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