Post-processing device and vehicle

Abstract

The application relates to a post-processing device and a vehicle. The post-processing device is used for processing exhaust gas generated by the vehicle, and the post-processing device comprises a shell, multiple partitions and multiple functional units. The shell is internally provided with an accommodating cavity, the multiple partitions are arranged in the accommodating cavity at intervals, and the multiple partitions are configured to be capable of separating the accommodating cavity into multiple chambers. Part of the multiple partitions is provided with a communication hole to communicate adjacent chambers. Each functional unit is in communication with two corresponding chambers to process exhaust gas in the corresponding chambers. The multiple functional units can process the exhaust gas in the accommodating cavity, and each functional unit can communicate the two chambers to transport the processed air from one chamber to another chamber. The application makes the exhaust gas flow between the chambers, so that the exhaust gas has smaller resistance when flowing, the pressure generated by the exhaust gas itself is smaller, the exhaust back pressure of the post-processing device is smaller, and the influence on the combustion efficiency of the engine is smaller.

Description

Technical Field

[0001] This application relates to the field of vehicle exhaust gas treatment technology, and in particular to an aftertreatment device and a vehicle. Background Technology

[0002] To meet emission regulations, vehicles need to treat their exhaust gases before emitting them. Vehicles typically use aftertreatment devices to treat exhaust gases to meet emission standards before releasing them. Traditional aftertreatment devices have high exhaust back pressure, which affects engine combustion efficiency. Summary of the Invention

[0003] Therefore, it is necessary to provide an aftertreatment device and vehicle to address the problem that the high exhaust back pressure of traditional aftertreatment devices affects the combustion efficiency of the engine.

[0004] According to a first aspect of this application, an aftertreatment device is provided for treating exhaust gases generated by a vehicle, the aftertreatment device comprising:

[0005] The shell has an internal cavity;

[0006] Multiple partitions are spaced apart within the receiving cavity, the partitions being configured to divide the receiving cavity into multiple chambers, and portions of the partitions having connecting holes to connect adjacent chambers; and

[0007] Multiple functional units are provided, each of which is connected to two corresponding chambers to process the exhaust gas in the corresponding chambers.

[0008] In one embodiment, each of the chambers is formed by the corresponding partition and the housing.

[0009] In one embodiment, the plurality of partitions includes a plurality of first partitions extending along a first direction and spaced apart along a second direction, and a plurality of second partitions extending along the second direction and spaced apart along the first direction; the plurality of first partitions are used to divide the receiving cavity into multiple partition spaces, and the plurality of second partitions are respectively disposed in the multiple partition spaces to divide the multiple partition spaces into a plurality of chambers;

[0010] Wherein, the first direction and the second direction are perpendicular to each other.

[0011] In one embodiment, three first partitions are provided to divide the receiving cavity into four partitioned spaces; five second partitions are provided to divide the four partitioned spaces into nine chambers.

[0012] In one embodiment, the nine chambers include a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a sixth chamber, a seventh chamber, an eighth chamber, and a ninth chamber through which the exhaust gas passes in sequence; the air inlet on the housing is connected to the first chamber, and the air outlet on the housing is connected to the ninth chamber;

[0013] The first partition between the first chamber and the second chamber is provided with the communication hole; the second partition between the fourth chamber and the fifth chamber is provided with the communication hole; the first partition between the fifth chamber and the sixth chamber is provided with the communication hole;

[0014] The various functional units include a first mixing unit, a second mixing unit, a selective oxidation-reduction unit, a low-temperature selective oxidation-reduction unit, and an oxidation trap unit; the first mixing unit is configured to communicate with the second chamber and the third chamber respectively, so as to transport the exhaust gas in the second chamber to the third chamber after treatment; the low-temperature selective oxidation-reduction unit is configured to communicate with the third chamber and the fourth chamber respectively, so as to transport the exhaust gas in the third chamber to the fourth chamber after treatment; the oxidation trap unit is configured to communicate with the sixth chamber and the seventh chamber respectively, so as to transport the exhaust gas in the sixth chamber to the seventh chamber after treatment; the second mixing unit is configured to communicate with the seventh chamber and the eighth chamber respectively, so as to transport the exhaust gas in the seventh chamber to the eighth chamber after treatment; the selective oxidation-reduction unit is configured to communicate with the eighth chamber and the ninth chamber respectively, so as to transport the exhaust gas in the eighth chamber to the ninth chamber after treatment.

[0015] In one embodiment, the plurality of said functional units include an exhaust gas treatment unit, the exhaust gas treatment unit comprising:

[0016] A cylindrical body is fixedly installed inside the receiving cavity, and the cylindrical body communicates with the corresponding cavity.

[0017] The main body, detachably mounted inside the cylinder, is configured to handle exhaust gas entering the cylinder; and

[0018] A gasket is installed between the main body and the cylinder.

[0019] In one embodiment, the exhaust gas treatment unit includes a selective oxidation-reduction unit, a low-temperature selective oxidation-reduction unit, and an oxidation trap unit, wherein the cylinders of the selective oxidation-reduction unit, the low-temperature selective oxidation-reduction unit, and the oxidation trap unit have the same structure.

[0020] In one embodiment, the housing is further provided with three disassembly windows, each of the disassembly windows including a disassembly opening provided in the housing and a cover plate sealing the disassembly opening;

[0021] The three disassembly windows are respectively provided for the selective oxidation-reduction unit, the low-temperature selective oxidation-reduction unit and the oxidation trap unit, and each disassembly port is connected to the cylinder of the corresponding exhaust gas treatment unit.

[0022] In one embodiment, the exhaust gas treatment unit further includes a pull handle located on the main body.

[0023] According to a second aspect of this application, a vehicle is also provided, the vehicle including the after-treatment device as described above, the after-treatment device comprising:

[0024] The shell has an internal cavity;

[0025] Multiple partitions are spaced apart within the receiving cavity, the partitions being configured to divide the receiving cavity into multiple chambers, and portions of the partitions having connecting holes to connect adjacent chambers; and

[0026] Multiple functional units are provided, each of which is connected to two corresponding chambers to process the exhaust gas in the corresponding chambers.

[0027] In the technical solution of this application, the aftertreatment device divides the receiving cavity into multiple chambers by multiple baffles, and some baffles are also provided with connecting holes, so that exhaust gas can flow from one chamber to another. Furthermore, multiple functional units can treat the exhaust gas in the receiving cavity, and each functional unit can connect two chambers, thereby transporting the treated air from one chamber to another. Through the cooperation of the connecting holes and the transport functions of the functional units, the exhaust gas can quickly flow between the various chambers, and during the flow, it is treated by the multiple functional units. Compared with traditional aftertreatment devices, this application makes full use of the available space of the aftertreatment device, allowing the exhaust gas to flow between the various chambers, resulting in less resistance to the exhaust gas flow and less pressure generated by the exhaust gas itself. Therefore, the exhaust back pressure of the aftertreatment device proposed in this application is lower, and its impact on engine combustion efficiency is smaller. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an embodiment of the post-processing apparatus proposed in this application.

[0029] Figure 2 for Figure 1 A schematic diagram of part of the mid-to-post-processing unit.

[0030] Figure 3 for Figure 1 A side view of the mid-to-post-processing unit.

[0031] Figure 4 for Figure 1 A schematic diagram of the structure of the exhaust gas treatment unit.

[0032] Explanation of icon numbers:

[0033]

[0034] Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] To meet emission regulations, vehicles need to treat their exhaust gases before emitting them. Vehicles typically use aftertreatment devices to treat exhaust gases to meet emission standards before releasing them. Traditional aftertreatment devices have high exhaust back pressure, which affects engine combustion efficiency.

[0042] The inventors of this application discovered through research that traditional aftertreatment devices process exhaust gases sequentially through multiple functional units, which need to be connected by pipes to transport exhaust gases from one unit to another. However, the space inside the pipes is relatively narrow, which leads to significant resistance when transporting exhaust gases. The exhaust gases themselves also create significant pressure within the pipes, resulting in high exhaust back pressure in traditional aftertreatment devices, which affects the combustion efficiency of the engine.

[0043] In view of this, this application proposes an aftertreatment device to solve the problem that the high exhaust back pressure of traditional aftertreatment devices affects the combustion efficiency of the engine. Figures 1 to 4 This is a schematic diagram of an embodiment of the post-processing apparatus proposed in this application.

[0044] Please see Figures 1 to 3 The aftertreatment device 100 proposed in this application is used to treat exhaust gas generated by a vehicle. The aftertreatment device 100 includes a housing 1, multiple partitions 2, and multiple functional units 3. The housing 1 has a receiving cavity 11 inside, and the multiple partitions 2 are spaced apart within the receiving cavity 11. The multiple partitions 2 are configured to divide the receiving cavity 11 into multiple chambers 12. Parts of the multiple partitions 2 have connecting holes 23 to connect adjacent chambers 12. Each functional unit 3 is connected to two corresponding chambers 12 to treat the exhaust gas in the corresponding chamber 12.

[0045] In the technical solution of this application, the aftertreatment device 100 divides the receiving cavity 11 into multiple chambers 12 by multiple partitions 2, and some partitions 2 are also provided with connecting holes 23, so that the exhaust gas can flow from one chamber 12 to another chamber 12. In addition, multiple functional units 3 can treat the exhaust gas in the receiving cavity 11, and each functional unit 3 can connect two chambers 12, thereby transporting the treated air from one chamber 12 to another chamber 12. Through the cooperation of the connecting holes 23 and the transport of the functional units 3, the exhaust gas can flow quickly between the various chambers 12, and the exhaust gas is treated by the multiple functional units 3 during the flow. Compared with the conventional aftertreatment device 100, this application allows the exhaust gas to flow between the various chambers 12, so that the exhaust gas encounters less resistance during flow and the pressure generated by the exhaust gas itself is also lower. Therefore, the exhaust back pressure of the aftertreatment device 100 proposed in this application is lower, and the impact on the engine combustion efficiency is smaller.

[0046] In some embodiments, each chamber 12 is formed by a corresponding partition 2 enclosing the housing 1. Multiple functional units 3 are installed in the receiving cavity 11, so that when the exhaust gas flows in each chamber 12, it can fully contact each functional unit 3, thereby repeatedly heating each functional unit 3 by the temperature of the exhaust gas, thereby reducing the ignition time of the catalyst in each functional unit 3 and improving the exhaust thermal management efficiency of the aftertreatment device 100.

[0047] In some embodiments, the plurality of partitions 2 include a plurality of first partitions 21 extending along a first direction M and spaced apart along a second direction N, and a plurality of second partitions 22 extending along the second direction N and spaced apart along the first direction M; the plurality of first partitions 21 are used to divide the receiving cavity 11 into multiple partition spaces, and the plurality of second partitions 22 are respectively disposed in the multiple partition spaces to divide the multiple partition spaces into a plurality of chambers 12. The first direction M and the second direction N are perpendicular to each other.

[0048] In this application, the first direction M and the second direction N are two opposite directions. The first direction M can be set as the opposite direction of multiple second partitions 22, and the second direction N can be set as the opposite direction of multiple first partitions 21.

[0049] Specifically, the housing 1 divides the receiving cavity 11 into multiple layers of partitioned space directly through multiple larger first partitions 21, and then further divides the multiple layers of partitioned space through multiple smaller second partitions 22, thereby dividing the receiving cavity 11 into multiple chambers 12. It should be noted that the number of chambers 12 can be adjusted according to actual needs, simply by changing the number of second partitions 22 and the number of first partitions 21.

[0050] In some embodiments, three first partitions 21 are provided to divide the receiving cavity 11 into four partitioned spaces. Five second partitions 22 are provided to divide the four partitioned spaces into nine chambers 12. Specifically, exhaust gas can flow from one chamber 12 to another chamber 12 through the connecting holes 23 on the partitions 2, and exhaust gas can also flow from one chamber 12 to another chamber 12 through the functional unit 3. Through the cooperation of the connecting holes 23 and the functional unit 3, the exhaust gas flows through the nine chambers 12 sequentially before being discharged to the outside, and undergoes catalytic treatment during the flow process, thereby meeting emission standards.

[0051] It should be noted that the number of chambers 12 is determined by the number of the first partition 21 and the second partition 22, but it is also affected by the functional units 3 included in the post-processing device 100 itself. In this embodiment, the receiving cavity 11 is divided into nine chambers 12. However, the receiving cavity 11 is not limited to being divided into nine chambers 12, and can be adjusted according to actual usage requirements.

[0052] In some embodiments, the nine chambers 12 include a first chamber 121, a second chamber 122, a third chamber 123, a fourth chamber 124, a fifth chamber 125, a sixth chamber 126, a seventh chamber 127, an eighth chamber 128, and a ninth chamber 129 through which the exhaust gas passes in sequence; the air inlet 13 on the housing 1 is connected to the first chamber 121, and the air outlet 14 on the housing 1 is connected to the ninth chamber 129.

[0053] The first partition 21 between the first chamber 121 and the second chamber 122 is provided with a connecting hole 23, the second partition 22 between the fourth chamber 124 and the fifth chamber 125 is provided with a connecting hole 23, and the first partition 21 between the fifth chamber 125 and the sixth chamber 126 is provided with a connecting hole 23.

[0054] The multifunctional unit 3 includes a first mixing unit 31, a second mixing unit 32, a selective oxidation-reduction unit 33, a low-temperature selective oxidation-reduction unit 34, and an oxidation trap unit 35. The first mixing unit 31 is configured to communicate with the second chamber 122 and the third chamber 123 respectively, to treat the exhaust gas in the second chamber 122 and then transport it to the third chamber 123. The low-temperature selective oxidation-reduction unit 34 is configured to communicate with the third chamber 123 and the fourth chamber 124 respectively, to treat the exhaust gas in the third chamber 123 and then transport it to the fourth chamber 124. The oxidation trap unit 35 is configured to communicate with the sixth chamber 126 and the seventh chamber 127 respectively, to treat the exhaust gas in the sixth chamber 126 and then transport it to the seventh chamber 127. The second mixing unit 32 is configured to communicate with the seventh chamber 127 and the eighth chamber 128 respectively, to treat the exhaust gas in the seventh chamber 127 and then transport it to the eighth chamber 128. The selective oxidation-reduction unit 33 is connected to the eighth chamber 128 and the ninth chamber 129 respectively, so as to transport the exhaust gas in the eighth chamber 128 to the ninth chamber 129 after treatment.

[0055] In practical applications, the oxidation trap unit 35 is composed of an oxidation catalyst unit and a particulate trap.

[0056] In the above embodiments, the multiple functional units 3 include a first mixing unit 31, a second mixing unit 32, a selective oxidation-reduction unit 33, a low-temperature selective oxidation-reduction unit 34, and an oxidation trap unit 35. However, other functional units 3 also exist, such as a combustion unit and a hydrocarbon injection unit. In practical applications, these other functional units 3 are not connected to the two chambers 12, and therefore are not mentioned. Exhaust gas enters the first chamber 121 through the air inlet 13 on the housing 1, and then sequentially passes through the second chamber 122, the third chamber 123, the fourth chamber 124, the fifth chamber 125, the sixth chamber 126, the seventh chamber 127, the eighth chamber 128, and the ninth chamber 129, before exiting the receiving chamber 11 from the ninth chamber 129. As the exhaust gas flows through the nine chambers 12, it sequentially passes through the multiple functional units 3, which treat the exhaust gas to ensure it meets emission standards.

[0057] Please see Figure 4In some embodiments, the multifunctional unit 3 includes an exhaust gas treatment unit 4, which includes a cylinder 41, a main body 42, and a gasket 43. The cylinder 41 is fixedly installed in the receiving cavity 11 and communicates with a corresponding chamber 12. The main body 42 is detachably installed in the cylinder 41 and is configured to treat the exhaust gas entering the cylinder 41. The gasket 43 is installed between the main body 42 and the cylinder 41.

[0058] The main body 42 of the exhaust gas treatment unit 4 contains a catalyst that treats the exhaust gas, gradually enabling it to meet emission requirements. The cylinder 41 of the exhaust gas treatment unit 4 is actually connected to two chambers 12 respectively, allowing untreated exhaust gas to enter and the treated exhaust gas from the main body 42 to exit into the next chamber 12. Furthermore, a gasket 43 is provided between the main body 42 and the cylinder 41; this gasket reduces the pressure of the main body 42 on the cylinder 41 and also provides a certain degree of sealing.

[0059] In some embodiments, the exhaust gas treatment unit 4 includes a selective oxidation-reduction unit 33, a low-temperature selective oxidation-reduction unit 34, and an oxidation trap unit 35, and the cylinder 41 of each of the selective oxidation-reduction unit 33, the low-temperature selective oxidation-reduction unit 34, and the oxidation trap unit 35 has the same structure.

[0060] The selective oxidation-reduction unit 33, the low-temperature selective oxidation-reduction unit 34, and the oxidation trap unit 35 each have the same cylindrical body 41 structure. Therefore, the main body 42 of the selective oxidation-reduction unit 33, the low-temperature selective oxidation-reduction unit 34, and the oxidation trap unit 35 can be installed in any cylindrical body 41, thereby allowing the selective oxidation-reduction unit 33, the low-temperature selective oxidation-reduction unit 34, and the oxidation trap unit 35 to be interchanged. In fact, not every vehicle's aftertreatment device 100 includes the selective oxidation-reduction unit 33, the low-temperature selective oxidation-reduction unit 34, and the oxidation trap unit 35. Some vehicles may only include one or more of these units, or may include other catalytic converters. Therefore, when the aftertreatment device 100 needs to replace different exhaust gas treatment units 4 or remove part of the exhaust gas treatment unit 4, the operator can still disassemble and replace them. In other words, the external structure of the cylinder 41 of each exhaust gas treatment unit 4 is the same as that of the main body 42, so the aftertreatment device 100 can more flexibly configure the type and number of exhaust gas treatment units 4.

[0061] Please see Figures 1 to 4In some embodiments, the housing 1 is further provided with three disassembly windows 15, each disassembly window 15 including a disassembly port provided in the housing 1 and a cover plate with a sealing cover provided in the disassembly port. The three disassembly windows 15 are respectively provided with the selective oxidation-reduction unit 33, the low-temperature selective oxidation-reduction unit 34 and the oxidation trap unit 35, and each disassembly port is connected to the cylinder 41 of the corresponding exhaust gas treatment unit 4.

[0062] When the selective oxidation-reduction unit 33, the low-temperature selective oxidation-reduction unit 34, and the oxidation trap unit 35 need to be installed or disassembled to change their installation positions, the operator can open the corresponding disassembly window 15 and pull the main body 42 out from the corresponding cylinder 41 to complete the disassembly. Furthermore, the disassembly window 15 is sealed at the disassembly opening, so the disassembly window 15 will not affect the normal operation of the exhaust gas treatment unit 4.

[0063] In some embodiments, the exhaust gas treatment unit 4 further includes a pull handle 421 disposed on the main body 42. When disassembling the exhaust gas treatment unit 4, the operator needs to remove the main body 42 from the cylinder 41 and pull the main body 42 out of the cylinder 41. However, in this embodiment, the operator can easily pull the main body 42 out of the corresponding cylinder 41 using the pull handle 421 installed on the main body 42, making the disassembly and installation of the main body 42 simpler.

[0064] This application also proposes a vehicle including the aftertreatment device 100 as described in any of the above embodiments. When the vehicle treats exhaust gas through the aftertreatment device 100, the exhaust back pressure of the aftertreatment device 100 is relatively small, so the exhaust resistance is also small, and the exhaust rate of the engine can be faster, thereby enabling the engine to maintain high combustion efficiency, which also allows the vehicle to maintain high power performance.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An after-treatment device for treating exhaust gases produced by a vehicle, characterized in that, The post-processing device includes: The shell has an internal cavity; Multiple partitions are spaced apart within the receiving cavity, and the partitions are configured to divide the receiving cavity into multiple chambers. A portion of each partition has a connecting hole to connect adjacent chambers. The multiple partitions include multiple first partitions extending along a first direction and spaced apart along a second direction, and multiple second partitions extending along the second direction and spaced apart along the first direction. The multiple first partitions divide the receiving cavity into multiple layers of partitioned spaces, and the multiple second partitions are respectively disposed within these multiple layers of partitioned spaces to divide these multiple layers of partitioned spaces into multiple chambers. Three first partitions are provided to divide the receiving cavity into four layers of partitioned spaces; five second partitions are provided to divide the four layers of partitioned spaces into nine chambers. The first direction and the second direction are perpendicular to each other. Multiple functional units, each of which is connected to two corresponding chambers to process the exhaust gas in the corresponding chambers; The nine chambers include a first chamber, a second chamber, a third chamber, a fourth chamber, a fifth chamber, a sixth chamber, a seventh chamber, an eighth chamber, and a ninth chamber through which the exhaust gas passes in sequence; the air inlet on the housing is connected to the first chamber, and the air outlet on the housing is connected to the ninth chamber; The first partition between the first chamber and the second chamber is provided with the communication hole; the second partition between the fourth chamber and the fifth chamber is provided with the communication hole; the first partition between the fifth chamber and the sixth chamber is provided with the communication hole; The various functional units include a first mixing unit, a second mixing unit, a selective oxidation-reduction unit, a low-temperature selective oxidation-reduction unit, and an oxidation trap unit; the first mixing unit is configured to communicate with the second chamber and the third chamber respectively, so as to transport the exhaust gas in the second chamber to the third chamber after treatment; the low-temperature selective oxidation-reduction unit is communicated with the third chamber and the fourth chamber respectively, so as to transport the exhaust gas in the third chamber to the fourth chamber after treatment; the oxidation trap unit is communicated with the sixth chamber and the seventh chamber respectively, so as to transport the exhaust gas in the sixth chamber to the seventh chamber after treatment.

2. The post-processing apparatus according to claim 1, characterized in that, Each of the chambers is formed by the corresponding partition and the shell.

3. The post-processing apparatus according to claim 1, characterized in that, The second mixing unit is connected to the seventh chamber and the eighth chamber respectively, so as to transport the exhaust gas in the seventh chamber to the eighth chamber after treatment; the selective oxidation-reduction unit is connected to the eighth chamber and the ninth chamber respectively, so as to transport the exhaust gas in the eighth chamber to the ninth chamber after treatment.

4. The post-processing apparatus according to claim 1, characterized in that, The various functional units include an exhaust gas treatment unit, which includes: A cylindrical body is fixedly installed inside the receiving cavity, and the cylindrical body communicates with the corresponding cavity. The main body, detachably mounted inside the cylinder, is configured to handle exhaust gas entering the cylinder; and A gasket is installed between the main body and the cylinder.

5. The post-processing apparatus according to claim 4, characterized in that, The exhaust gas treatment unit includes a selective oxidation-reduction unit, a low-temperature selective oxidation-reduction unit, and an oxidation trap unit. The cylinders of the selective oxidation-reduction unit, the low-temperature selective oxidation-reduction unit, and the oxidation trap unit have the same structure.

6. The post-processing apparatus according to claim 5, characterized in that, The housing is also provided with three disassembly windows, each of which includes a disassembly port located on the housing and a cover plate that seals the disassembly port. The three disassembly windows are respectively provided for the selective oxidation-reduction unit, the low-temperature selective oxidation-reduction unit and the oxidation trap unit, and each disassembly port is connected to the cylinder of the corresponding exhaust gas treatment unit.

7. The post-processing apparatus according to claim 4, characterized in that, The exhaust gas treatment unit also includes a pull-out handle located on the main body.

8. A vehicle, characterized in that, Includes the post-processing apparatus as described in any one of claims 1 to 7.

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