Activated carbon sponge HC capturing device and carbon tank assembly

Abstract

The invention discloses an activated carbon sponge HC capture device and a carbon canister assembly, the device comprises an HC capture cavity, a plurality of cavity partition plates are arranged in the HC capture cavity, the HC capture cavity is divided into a plurality of containing cavities by the cavity partition plates, and activated carbon sponge is arranged in each containing cavity; the cavity division partition plate comprises a cavity division partition plate mounting ring and a cavity division partition plate flange, the cavity division partition plate mounting ring and the cavity division partition plate flange are fixedly connected to form an annular step-shaped structure, and a plurality of cavity division partition plate through holes are formed in the middle of the cavity division partition plate; the activated carbon sponge comprises an activated carbon sponge body, and an activated carbon sponge groove is formed in the activated carbon sponge body; and the cavity separation plate mounting ring can be embedded into the activated carbon sponge groove to form an airflow buffer cavity. According to the carbon tank assembly, a plurality of activated carbon sponges can be flexibly assembled according to needs, the problems that honeycomb-shaped activated carbon rods are difficult to arrange, large in weight and high in cost are solved, and the purpose of low emission of the carbon tank assembly is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of a carbon canister assembly, and in particular to an activated carbon sponge HC capture device and a carbon canister assembly. Background Art

[0002] Gasoline is a highly volatile liquid fuel. When the car is refueled or encounters ambient temperature fluctuations, its molecules will vaporize, causing a large amount of oil and gas to escape into the air, which constitutes an environmental pollution source that cannot be ignored. In view of this environmental challenge, governments around the world have successively promulgated strict emission regulations to strictly restrict and reduce the total amount of vehicle fuel evaporation emissions. At present, China's current National VI emission standards set strict limits on HC (hydrocarbon) emissions in vehicle daytime evaporative emissions (2DBL), requiring no more than 0.7g / test. At the same time, for vehicle-mounted activated carbon canisters, their HC emissions must be controlled within 100mg / test under normal test conditions. This goal can be achieved by optimizing the combination of activated carbon materials. However, with the upcoming introduction of the more stringent National VII emission standards, it is expected that the HC emission limits for vehicle daytime evaporative emissions will be further tightened, and it is very likely that the upper limit of HC emissions from activated carbon canisters will be reduced to less than 20mg / test. Based on previous experience in dealing with upgraded emission regulations, in order to meet such stringent new standards, the use of honeycomb activated carbon rods (Honeycombs) with low permeability properties will become a necessary choice.

[0003] Honeycomb activated carbon rods are mainly made of activated carbon and ceramic materials through a sintering process to form a solid medium with low emission performance. In order to meet the needs of large-scale production and convenient use, such products are usually manufactured into cylindrical structures with standard specifications. Common diameter sizes include 29 mm, 35 mm and 50 mm; in terms of length, 50 mm and 100 mm are gradually becoming the standard configuration in the industry. It is worth noting that the overall design of the activated carbon canister (or charcoal canister) often needs to be customized according to the spatial layout requirements of a specific vehicle model. Therefore, when faced with application scenarios that require the integration of standard-sized honeycomb activated carbon rods, design layout problems caused by space limitations are often encountered.

[0004] The honeycomb activated carbon rod uses a fine activated carbon layer inside, which is tightly attached to the wall surface of the honeycomb structure. When the gas containing HC (hydrocarbon) molecules passes through the carbon canister, these molecules are effectively adsorbed by the activated carbon layer due to the wall adhesion effect. During the desorption process, a small amount of clean air can effectively release the previously adsorbed HC molecules again, thereby achieving lower emission performance. In order to achieve this high efficiency and low emission effect, the design of the honeycomb activated carbon rod requires it to have an extremely thin but evenly distributed grid-like feature, while also ensuring that the raw materials have sufficient mechanical strength to support the stability and durability of the entire structure. This not only requires the use of high-precision extrusion equipment for production and processing, but also involves a series of complex and precise manufacturing process flows, and requires the use of high-strength, wear-resistant ceramic materials as the substrate. Therefore, this type of product is heavy and the manufacturing cost is relatively high.

[0005] The Chinese invention patent with publication number CN112513449A specifically discloses a method of covering a foam (sponge) or other material with a hydrocarbon adsorption coating substrate, wherein the coating mainly comprises granular carbon and a binder, and for the convenience of description is uniformly referred to as "activated carbon sponge". The sponge has a rich three-dimensional ventilation grid, each of which is composed of a number of polyurethane filaments. A layer of material that can adsorb HC is coated on each polyurethane filament, which can also achieve the same function as a honeycomb activated carbon rod. It can not only overcome the disadvantages of the honeycomb activated carbon rod that it is difficult to design and has a high cost, but also has the advantages of being easy to deform due to its weight, and can be conveniently designed into any shape. However, the technical solution for assembling the activated carbon sponge into the carbon canister is not disclosed. Therefore, it is necessary to solve how to combine the activated carbon sponge with the carbon canister to achieve the purpose of low emissions from the carbon canister. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide an activated carbon sponge HC capture device and a carbon canister assembly. The carbon canister assembly can solve the problems of difficult arrangement, heavy weight and high cost of honeycomb activated carbon rods, and combines the activated carbon sponge with the carbon canister to achieve the purpose of low emission of the carbon canister.

[0007] To achieve the above-mentioned object, the present invention provides an activated carbon sponge HC capture device, comprising an HC capture chamber, wherein a plurality of partition plates are arranged in the HC capture chamber, wherein the partition plates divide the HC capture chamber into a plurality of accommodating chambers, wherein each of the accommodating chambers is provided with an activated carbon sponge;

[0008] The partition plate includes a partition plate mounting ring and a partition plate flange, the partition plate mounting ring is fixedly connected to the partition plate flange to form an annular step-shaped structure, and a plurality of partition plate through holes are opened in the middle of the partition plate;

[0009] The activated carbon sponge comprises an activated carbon sponge body, on which an activated carbon sponge groove is arranged; the chamber partition mounting ring can be embedded in the activated carbon sponge groove to form an airflow buffer chamber.

[0010] As a preferred embodiment, the HC capture cavity includes a plurality of stepped straight arm segments, each of which forms a accommodating cavity in the circumferential direction; the stepped straight arm segment is interference fit with the activated carbon sponge located in its inner cavity;

[0011] Two adjacent step straight arm sections are transitionally connected via an inclined step; the inclined step abuts against the corresponding chamber partition.

[0012] As a preferred embodiment, the HC capture cavity has a small diameter end and a large diameter end, and the small diameter end of the HC capture cavity is provided with an air pipe opening connected to the external environment. The diameter of the cavity inside the HC capture cavity gradually increases from the small diameter end to the large diameter end to form a stepped cavity structure.

[0013] As a preferred embodiment, the inner wall of one end of the HC capture chamber located at the air pipe opening is provided with a plurality of supporting columns, and a filter sponge is provided below the supporting columns.

[0014] As a preferred embodiment, the carbon content of the activated carbon sponge near the large diameter end in the HC capture cavity gradually decreases toward the carbon content of the activated carbon sponge near the small diameter end.

[0015] As a preferred embodiment, the base material of the activated carbon sponge is polyurethane, and the porosity of the base material is less than 70 PPI.

[0016] As a preferred embodiment, the inner diameter of the step straight arm section is smaller than the outer diameter of the activated carbon sponge body located in its inner cavity, and the height of the step straight arm section is greater than the height of the activated carbon sponge body located in its inner cavity;

[0017] The inner diameter of the activated carbon sponge groove is smaller than the outer diameter of the chamber partition mounting ring.

[0018] As a preferred embodiment, the inner diameter of the step straight arm section is 0.8 to 0.9 times the outer diameter of the activated carbon sponge body located in its inner cavity; the height of the step straight arm section is more than 5 mm greater than the height of the activated carbon sponge body located in its inner cavity.

[0019] As a preferred embodiment, the partition plate mounting ring is interference fit with the activated carbon sponge groove; the inner diameter of the activated carbon sponge groove is smaller than the outer diameter of the partition plate mounting ring; the height of the partition plate mounting ring is greater than 5 mm;

[0020] The sum of the inner diameter areas of the through holes of each of the partition plates is greater than the inner diameter area of ​​the air pipe opening.

[0021] The present invention also provides a carbon canister assembly, comprising a main adsorption chamber and a secondary adsorption chamber, wherein the main adsorption chamber is provided with an adsorption pipe opening connected to the fuel tank and a desorption pipe opening communicated with the engine, and also comprises the above-mentioned activated carbon sponge HC capture device, wherein the large-diameter end of the HC capture chamber of the activated carbon sponge HC capture device is communicated with the secondary adsorption chamber, and the small-diameter end of the HC capture chamber is communicated with the external environment through the atmosphere pipe opening.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] Firstly, the carbon canister assembly of the present invention can flexibly assemble multiple activated carbon sponges as needed, thus overcoming the problems of difficult arrangement, heavy weight and high cost of honeycomb activated carbon rods, achieving the low emission purpose of the carbon canister assembly, and meeting the requirements of higher emission standards for carbon canisters.

[0024] Secondly, after the cavity partition mounting ring of the present invention is assembled with the activated carbon sponge groove, an airflow buffer cavity is formed between the two parts. After passing through the activated carbon or activated carbon sponge, the airflow buffer cavity can avoid the existence of the activated carbon sponge airflow dead zone. The working capacity of the activated carbon sponge can be fully utilized during adsorption, and the residual amount of HC in the activated carbon sponge can be greatly reduced during desorption, thereby achieving the purpose of low emission of the carbon canister assembly.

[0025] Thirdly, when the chamber partition and the activated carbon sponge of the present invention are assembled to the stepped straight arm section of the HC capture chamber, the outer diameter of the activated carbon sponge has an interference fit with the corresponding stepped straight arm section, and the chamber partition flange of the chamber partition contacts the inclined step to achieve the function of positioning the chamber partition, thereby avoiding relative movement of the chamber partition during vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cross-sectional structure of a carbon canister assembly;

[0027] Figure 2 It is a schematic diagram of an enlarged cross-sectional structure of an activated carbon sponge HC capture device;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the HC capture chamber;

[0029] Figure 4 It is a schematic diagram of the structure of the chamber partition;

[0030] Figure 5 Schematic diagram of the structure of activated carbon sponge;

[0031] Figure 6 for Figure 5Schematic diagram of the structure along the AA direction;

[0032] Figure 7 It is a schematic diagram of the structure after the chamber partition and the activated carbon sponge are assembled;

[0033] Figure 8 Schematic diagram of the process of assembling the chamber partition and activated carbon sponge into the HC capture chamber;

[0034] Fig. 9 This is a schematic diagram of the assembly of the chamber partition and the activated carbon sponge into the HC capture chamber;

[0035] In the figure, HC capture chamber 100, accommodating chamber 101, stepped straight arm section 102, inclined step 103, small diameter end 104, large diameter end 105, air pipe opening 106, supporting column 107, chamber partition 200, first chamber partition 200a, second chamber partition 200b, third chamber partition 200c, chamber partition mounting ring 201, chamber partition flange 202, chamber partition through hole 203, activated carbon sponge 300, first activated carbon sponge 300a, second activated carbon sponge 300b, third activated carbon sponge 300c, activated carbon sponge body 301, activated carbon sponge groove 302, airflow buffer chamber 400, filter sponge 500, main adsorption chamber 600, adsorption pipe opening 601, desorption pipe opening 602, auxiliary adsorption chamber 700. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail below in conjunction with specific embodiments, but those skilled in the art will understand that the following embodiments are part of the embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] like Figure 1The canister assembly shown includes a main adsorption chamber 600 and a secondary adsorption chamber 700. The main adsorption chamber 600 is provided with an adsorption pipe port 601 connected to the oil tank and a desorption pipe port 602 connected to the engine. It also includes an activated carbon sponge HC capture device. The large diameter end 105 of the HC capture chamber 100 of the activated carbon sponge HC capture device is connected to the secondary adsorption chamber 700, and the small diameter end 104 of the HC capture chamber 100 is connected to the external environment through the atmosphere pipe port 106. In this way, the canister assembly is divided into three functional areas, namely: the main adsorption chamber 600, the secondary adsorption chamber 700 and the HC capture chamber 100. The main function of the main adsorption chamber 600 is to adsorb most of the HC volatilized from the fuel tank. The chamber is usually filled with activated carbon powder with high adsorption performance. The outside is designed with an adsorption pipe port 601 connected to the fuel tank and a desorption pipe port 602 connected to the engine; the main function of the auxiliary adsorption chamber 700 is to adsorb a small amount of HC escaping from the main adsorption chamber 600. The chamber is usually filled with activated carbon powder with low residual performance. The main function of the HC capture chamber 100 is to capture small molecules of HC that migrate from the main adsorption chamber 600 and the auxiliary adsorption chamber 700 due to the temperature difference between day and night. The chamber is equipped with activated carbon sponge material. The activated carbon sponge is limited by the desorption volume of the carbon canister, the structural size and shape of the canister, the ventilation pressure drop and other parameters. One or more activated carbon sponges can be used. This embodiment is explained in detail using the case of assembling three activated carbon sponges.

[0039] like Figure 2-3 As shown, an activated carbon sponge HC capture device of this embodiment includes an HC capture chamber 100, and a plurality of chamber partitions 200 are arranged in the HC capture chamber 100. The chamber partitions 200 divide the HC capture chamber 100 into a plurality of accommodating chambers 101, and an activated carbon sponge 300 is arranged in each accommodating chamber 101. The HC capture chamber 100 includes a plurality of stepped straight arm sections 102, and each stepped straight arm section 102 forms a accommodating chamber 101 in the circumferential direction; the stepped straight arm section 102 and the activated carbon sponge 300 located in the inner cavity thereof are interference fit; two adjacent stepped straight arm sections 102 are transitionally connected by an inclined step 103; and the inclined step 103 abuts against the corresponding chamber partition 200. In this embodiment, three inclined steps 103 for positioning the chamber partition 200 are arranged in the HC capture chamber 100.

[0040] The HC capture chamber 100 has a small diameter end 104 and a large diameter end 105. The small diameter end 104 of the HC capture chamber 100 is provided with an air pipe port 106 connected to the external environment. The diameter of the internal cavity 101 of the HC capture chamber 100 gradually increases from the small diameter end 104 to the large diameter end 105 to form a stepped cavity structure. A plurality of support columns 107 are provided on the inner wall of one end of the HC capture chamber 100 located at the air pipe port 106, and a filter sponge 500 is provided below the support column 107. The height of the support column 107 is greater than 5 mm.

[0041] In this embodiment, the inner diameter of the step straight arm section 102 is smaller than the outer diameter of the activated carbon sponge body 301 located in its inner cavity. Preferably, the inner diameter of the step straight arm section 102 is 0.8 to 0.9 times the outer diameter of the activated carbon sponge body 301 located in its inner cavity. The height of the step straight arm section 102 is greater than the height of the activated carbon sponge body 301 located in its inner cavity. Preferably, the height of the step straight arm section 102 is more than 5 mm greater than the height of the activated carbon sponge body 301 located in its inner cavity.

[0042] like Figure 4 As shown, the partition plate 200 includes a partition plate mounting ring 201 and a partition plate flange 202. The partition plate mounting ring 201 and the partition plate flange 202 are fixedly connected to form an annular step-shaped structure. A plurality of partition plate through holes 203 are opened in the middle of the partition plate 200. The partition plate mounting ring 201 can be a circular ring structure, and the opening shape of the partition plate through holes 203 can be a quadrilateral, hexagonal, octagonal, etc. In this embodiment, the HC capture chamber 100 is provided with three partition plates 200, namely, a first partition plate 200a, a second partition plate 200b, and a third partition plate 200c, which have basically the same structural features and their sizes match the corresponding activated carbon sponge size. The height of the partition plate mounting ring 201 is greater than 5 mm, preferably 10-15 mm; the sum of the inner diameter areas of the partition plate through holes 203 on each partition plate 200 is greater than the inner diameter area of ​​the air pipe opening 106. The partition plate can be made of metal or non-metal solid materials, preferably plastic.

[0043] like Figure 5 to Figure 7As shown, the activated carbon sponge 300 includes an activated carbon sponge body 301, and an activated carbon sponge groove 302 is provided on the activated carbon sponge body 301. The partition plate mounting ring 201 can be embedded in the activated carbon sponge groove 302 to form an airflow buffer chamber 400. The partition plate mounting ring 201 and the activated carbon sponge groove 302 are interference fit, and an airflow buffer chamber 400 is formed between the two parts after assembly. After passing through the activated carbon or activated carbon sponge, the airflow buffer chamber 400 can avoid the existence of the airflow dead zone of the activated carbon sponge, and the working capacity of the activated carbon sponge can be fully utilized during adsorption. During desorption, the residual amount of HC in the activated carbon sponge can be greatly reduced, thereby achieving the purpose of low emission of the carbon canister assembly.

[0044] The inner diameter of the activated carbon sponge groove 302 is smaller than the outer diameter of the partition plate mounting ring 201. Preferably, the inner diameter of the activated carbon sponge groove 302 is 0.8 to 0.9 times the outer diameter of the partition plate mounting ring 201. The carbon content of the activated carbon sponge 300 near the large diameter end 105 in the HC capture cavity 100 gradually decreases toward the carbon content of the activated carbon sponge 300 near the small diameter end 104.

[0045] like Figure 2 As shown, in this embodiment, three activated carbon sponges are arranged in the HC capture chamber 100, namely, the first activated carbon sponge 300a, the second activated carbon sponge 300b, and the third activated carbon sponge 300c; at the same time, the first chamber partition 200a, the second chamber partition 200b, and the third chamber partition 200c are respectively provided to match the first activated carbon sponge 300a, the second activated carbon sponge 300b, and the third activated carbon sponge 300c. The carbon content of the three activated carbon sponges can be defined according to the requirements of evaporative emissions, and is preferably designed to have different carbon contents. According to the carbon content of the activated carbon sponges, they are arranged from high to low as the first activated carbon sponge 300a, the second activated carbon sponge 300b, and the third activated carbon sponge 300c; the third activated carbon sponge 300c with a low carbon content contacts the filter sponge 500 and communicates with the air. The base material of the activated carbon sponge is polyurethane, and the porosity of the activated carbon sponge can be selected from materials below 70PPI, preferably materials with a porosity between 30 and 10PPI.

[0046] like Figure 8-Figure 9 As shown, when the chamber partition and the activated carbon sponge are assembled to the stepped straight arm section 102 of the HC capture chamber, the outer diameter of the activated carbon sponge has an interference fit with the corresponding stepped straight arm section, and the chamber partition flange 202 of the chamber partition contacts the inclined step 103 to achieve the purpose of positioning the chamber partition 200, thereby avoiding relative movement of the chamber partition during vibration.

[0047] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims.

[0048] The shapes, sizes, ratios, angles, and numbers disclosed for describing various aspects of the present specification and claims are merely examples, and therefore, the present specification and claims are not limited to the details shown. In the following description, when the detailed description of the related known functions or configurations is determined to be unnecessarily obscuring the focus of the present specification and claims, the detailed description will be omitted.

[0049] The features of various embodiments of the present invention may be combined or spliced ​​with each other in part or in whole, and may be performed in various different configurations as those skilled in the art may fully understand. The embodiments of the present invention may be performed independently of each other, or may be performed together through interdependent relationships.

[0050] The above are only specific embodiments of the present invention. It should be pointed out that any changes or substitutions that can be easily thought of by any technician familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. The rest not described in detail are prior arts.

Claims

1. An activated carbon sponge HC capture device, characterized in that: The invention comprises a HC capture chamber (100), wherein a plurality of chamber partitions (200) are arranged in the HC capture chamber (100), wherein the chamber partitions (200) divide the HC capture chamber (100) into a plurality of accommodating chambers (101), and an activated carbon sponge (300) is arranged in each of the accommodating chambers (101); The chamber partition (200) comprises a chamber partition mounting ring (201) and a chamber partition flange (202); the chamber partition mounting ring (201) and the chamber partition flange (202) are fixedly connected to form an annular step-shaped structure; a plurality of chamber partition through holes (203) are provided in the middle of the chamber partition (200); The activated carbon sponge (300) comprises an activated carbon sponge body (301), and an activated carbon sponge groove (302) is provided on the activated carbon sponge body (301); the chamber partition mounting ring (201) can be embedded in the activated carbon sponge groove (302) to form an airflow buffer chamber (400).

2. The activated carbon sponge HC capture device according to claim 1, characterized in that: The HC capture cavity (100) comprises a plurality of stepped straight arm sections (102), each of the stepped straight arm sections (102) circumferentially forming a receiving cavity (101); the stepped straight arm sections (102) are interference fit with the activated carbon sponge (300) located in the inner cavity thereof; Two adjacent stepped straight arm sections (102) are transitionally connected via an inclined step (103); the inclined step (103) abuts against a corresponding chamber partition (200).

3. The activated carbon sponge HC capture device according to claim 2, characterized in that: The HC capture cavity (100) has a small diameter end (104) and a large diameter end (105); the small diameter end (104) of the HC capture cavity (100) is provided with an air pipe opening (106) connected to the external environment; the diameter of the internal cavity (101) of the HC capture cavity (100) gradually increases from the small diameter end (104) to the large diameter end (105) to form a stepped cavity structure.

4. The activated carbon sponge HC capture device according to claim 3, characterized in that: A plurality of supporting columns (107) are arranged on the inner wall of one end of the HC capture chamber (100) located at the air pipe opening (106), and a filter sponge (500) is arranged below the supporting columns (107).

5. The activated carbon sponge HC capture device according to claim 4, characterized in that: The carbon content of the activated carbon sponge (300) in the HC capture cavity (100) close to the large diameter end (105) gradually decreases toward the carbon content of the activated carbon sponge (300) close to the small diameter end (104).

6. The activated carbon sponge HC capture device according to claim 5, characterized in that: The base material of the activated carbon sponge (300) is polyurethane, and the porosity of the base material is less than 70 PPI.

7. The activated carbon sponge HC capture device according to any one of claims 2 to 6, characterized in that: The inner diameter of the stepped straight arm section (102) is smaller than the outer diameter of the activated carbon sponge body (301) located in its inner cavity, and the height of the stepped straight arm section (102) is greater than the height of the activated carbon sponge body (301) located in its inner cavity; The inner diameter of the activated carbon sponge groove (302) is smaller than the outer diameter of the chamber partition plate mounting ring (201).

8. The activated carbon sponge HC capture device according to claim 7, characterized in that: The inner diameter of the stepped straight arm section (102) is 0.8 to 0.9 times the outer diameter of the activated carbon sponge body (301) located in its inner cavity; the height of the stepped straight arm section (102) is more than 5 mm greater than the height of the activated carbon sponge body (301) located in its inner cavity.

9. The activated carbon sponge HC capture device according to any one of claims 3 to 6, characterized in that: The chamber partition plate mounting ring (201) is interference-fitted with the activated carbon sponge groove (302); the inner diameter of the activated carbon sponge groove (302) is smaller than the outer diameter of the chamber partition plate mounting ring (201); the height of the chamber partition plate mounting ring (201) is greater than 5 mm; The sum of the inner diameter areas of the cavity partition through holes (203) on each cavity partition (200) is greater than the inner diameter area of ​​the atmospheric pipe opening (106).

10. A carbon canister assembly, comprising a main adsorption chamber (600) and a secondary adsorption chamber (700), wherein the main adsorption chamber (600) is provided with an adsorption pipe opening (601) connected to a fuel tank and a desorption pipe opening (602) connected to an engine, characterized in that: It also includes the activated carbon sponge HC capture device according to any one of claims 1 to 9, wherein the large diameter end (105) of the HC capture cavity (100) of the activated carbon sponge HC capture device is connected to the auxiliary adsorption cavity (700), and the small diameter end (104) of the HC capture cavity (100) is connected to the external environment through an atmospheric pipe opening (106).

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