Electric heating waste gas purification device

Abstract

The invention relates to an electric heating waste gas purification device, and belongs to the technical field of tail gas purification, the electric heating waste gas purification device comprises a heat insulation shell, a honeycomb carrier and a heating carrier, the honeycomb carrier is in butt joint with the heating carrier, the heating carrier and the honeycomb carrier are the same in structure, and the honeycomb carrier and the heating carrier are both located in the heat insulation shell; a heating wire is arranged on the end face, away from the honeycomb carrier, of the heating carrier, the heat insulation shell is connected with a connecting assembly used for externally connecting the heating wire, and a fixing assembly used for fixing the heating wire is installed on the heating carrier. The waste gas treatment device has the effects that when waste gas is treated through electric heating, the waste gas flow resistance can be reduced, and the catalyst aging condition can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of exhaust gas purification, and in particular to an electric heating exhaust gas purification device. Background Art

[0002] As environmental regulations become increasingly stringent, the demand for exhaust gas purification devices in the automotive, industrial and other fields involving combustion emissions continues to increase. In order to reduce harmful substances in exhaust gas such as carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx), exhaust gas purification systems usually use catalytic converters to promote the decomposition reaction of these pollutants. However, catalysts can only be most effective at higher temperatures. In this case, pollutants in the exhaust gas will be directly discharged into the atmosphere without being fully converted, resulting in excessive emissions.

[0003] To solve this problem, electric heating exhaust gas purification devices came into being. Such devices preheat the catalyst by arranging electric heating elements (such as heating tubes, heating plates or resistance wires) around the catalyst, thereby improving the efficiency of the catalytic reaction and reducing pollutant emissions during the cold start phase. Through electric heating, the catalyst can reach its activation temperature faster and effectively treat exhaust gas even under cold start conditions.

[0004] However, the current electric heating exhaust gas purification device has some technical limitations, especially in terms of airflow resistance. In the prior art, common electric heating devices include designs that heat the exhaust gas through a heating plate or a heating tube. The heating plate or heating tube is usually arranged at the front end or around the catalyst carrier to transfer heat to the catalyst. However, a significant disadvantage of this structure is that the electric heating element itself will partially block the flow of exhaust gas, increase energy consumption, and the catalyst around the heating point is easily aged due to high temperature and other processes, resulting in damage to the catalytic activity, affecting the exhaust gas treatment efficiency. Summary of the invention

[0005] In order to reduce the exhaust gas airflow resistance and catalyst aging when treating the exhaust gas by electric heating, the present application provides an electric heating exhaust gas purification device.

[0006] The electric heating exhaust gas purification device provided in this application adopts the following technical solution: An electric heating exhaust gas purification device comprises a heat-insulating shell, a honeycomb carrier and a heating carrier, wherein the honeycomb carrier is docked with the heating carrier, the heating carrier has the same structure as the honeycomb carrier, the honeycomb carrier and the heating carrier are both located in the heat-insulating shell, a heating wire is provided on an end face of the heating carrier away from the honeycomb carrier, the heat-insulating shell is connected to a connecting component for externally connecting the heating wire, and a fixing component for fixing the heating wire is installed on the heating carrier.

[0007] By adopting the above technical solution, at the initial stage of engine startup, the heating wire heats the heating carrier, and the heat of the heating carrier can be transferred to the honeycomb carrier to preheat the honeycomb carrier, thereby avoiding the situation where the heating point directly heats the honeycomb carrier and causes catalyst aging; Moreover, the exhaust gas also passes through the heating carrier and then enters the honeycomb carrier. After the exhaust gas is heated first, the heat in the exhaust gas can be quickly transferred to the catalyst surface because the exhaust gas is in direct contact with the catalyst surface. The higher exhaust gas temperature will shorten the time for the catalyst to reach the active temperature, thereby quickly activating the catalytic reaction.

[0008] Under this design, the catalyst itself only needs a small amount of auxiliary heating, which avoids the situation where the heating carrier transfers insufficient heat to the honeycomb carrier, and the main heating task is completed by exhaust gas heating. This can reduce the direct physical obstruction of the heating device to the catalyst.

[0009] At the same time, the heating carrier has the same structure as the honeycomb carrier, which will not affect the emission of gas, reduces the situation where the heating device blocks the exhaust gas, and can reduce the exhaust gas airflow resistance.

[0010] Optionally, the heating carrier includes a plurality of annular plates and a plurality of corrugated plates, the corrugated plates are annular structures, and one corrugated plate is arranged between every two adjacent annular plates. The fixing assembly includes a first fixing member and a second fixing member, the first fixing member is used to fix the heating wire to the annular plate, and the second fixing member is used to fix the heating wire to the corrugated plate.

[0011] Optionally, the heating wire is extended from the top of the end surface of the outermost annular plate to the bottom of its end surface and bent into the bottom of the end surface of the outermost corrugated plate, and then the heating wire is extended to the top of the end surface of the outermost corrugated plate, and then from the top of the end surface of the second annular plate along the bottom of the end surface of the second annular plate, and then the heating wire is bent into the bottom of the end surface of the second corrugated plate, and so on. After reaching the bottom of the end surface of the innermost corrugated plate, the heating wire is folded out to the bottom of the end surface of the innermost annular plate, and then the heating wire is wrapped back to the top of the end surface of the outermost annular plate in sequence.

[0012] By adopting the above technical solution, the heating wire can distribute heat more evenly by shuttling between multiple levels of corrugated plates and annular plates, ensuring the uniformity of the overall heating effect, while reducing the airflow resistance in the exhaust gas purification device and improving the exhaust gas treatment efficiency.

[0013] Optionally, the first fixing component includes a first pressure plate, the first pressure plate is connected to a fitting plate, the fitting plate is connected to a bending plate, the bending plate is connected to an elastic plate, a protrusion is installed on the elastic plate, the annular plate is provided with a plug-in slot on the side facing the central axis of the heat insulation shell, a clamping slot is provided on the side wall of the plug-in slot, the first pressure plate is opposite to the end face of the annular plate and presses the heating wire, the fitting plate is fitted with the annular plate, the elastic plate is inserted into the plug-in slot, and the protrusion is located in the clamping slot.

[0014] By adopting the above technical solution, the first pressing plate can press the heating wire only by inserting the elastic plate into the plug-in slot and snapping the protrusion into the slot. The design of the bonding plate is conducive to reducing the obstruction to the exhaust gas.

[0015] Optionally, the second fixing assembly includes a second pressing plate, the second pressing plate is connected to an elastic side plate, the second pressing plate faces the end face of the corrugated plate and presses the heating wire, and the elastic side plate fits against the side of the corrugated plate.

[0016] By adopting the above technical solution, the design of the second pressing plate and the elastic side plate can ensure that the heating wire fits tightly to the corrugated plate, thereby ensuring the efficiency of heat transfer and reducing the resistance of the corrugated plate to airflow.

[0017] Optionally, the connecting assembly includes a connecting seat, which is installed on the insulating shell, and the connecting seat is equipped with two wire tubes. The two ends of the heating wire are respectively located at the two wire tubes, and an external joint is installed in the wire tube, and the external joint is connected to the heating wire.

[0018] By adopting the above technical solution, the connection base and the wire tube can ensure that the power supply connection of the heating wire is safer and more reliable. The connection method between the external connector in the wire tube and the heating wire is not only convenient for installation and maintenance, but also can prevent the electrical connection problem of the heating wire in a high temperature environment, thereby improving the working stability of the entire device.

[0019] Optionally, a ring plate core is provided in the heat-insulating outer shell, the innermost corrugated plate is sleeved on the ring plate core, and a first temperature sensor is provided on the end surface of the ring plate core facing away from the honeycomb carrier.

[0020] By adopting the above technical solution, the first temperature sensor is used to detect whether the temperature of the exhaust gas has reached the catalytic requirement. If the catalytic requirement is reached, the first temperature sensor can first control the system to send an instruction to cut off the power to the heating wire to ensure precise control of the heating system.

[0021] Optionally, the ring plate core is coaxially connected with an extension tube, and the first temperature sensor is provided on an end surface of the extension tube facing away from the ring plate core.

[0022] By adopting the above technical solution, the temperature sensor is set on the end face of the extension tube, which can avoid the control of the heating wire heating the surrounding area affecting the judgment of the first temperature sensor. The extension tube makes the first temperature sensor away from the heating carrier and close to the internal combustion engine, so as to more accurately obtain the exhaust gas temperature discharged by the internal combustion engine, further improving the temperature control of the system.

[0023] Optionally, a partition component is provided between the honeycomb carrier and the heating carrier, and the partition component is connected to the honeycomb carrier and the heating carrier.

[0024] By adopting the above technical solution, when the honeycomb carrier needs to be heated, the partition assembly transfers the heat of the heating carrier to the honeycomb carrier, thereby preheating the catalyst. When the catalyst reaches the preheating temperature and the exhaust gas still needs to be heated, the partition assembly is separated from the honeycomb carrier and the heating assembly to avoid continued heating of the honeycomb carrier, which affects the activity of the catalyst.

[0025] Optionally, the partition assembly includes a partition semicircular plate, two of the partition semicircular plates are spliced ​​together into a plate of the same size as the outermost annular plate, a second temperature sensor is embedded in the end surface of the partition semicircular plate facing away from the annular plate, the thermal insulation shell is provided with an annular groove, the annular groove corresponds to the partition semicircular plate, a plurality of springs are arranged in the annular groove, the springs are connected to the partition semicircular plate, an electromagnet is arranged in the annular groove, an adsorption block is arranged on the partition semicircular plate, and the electromagnet is directly opposite to the adsorption block.

[0026] By adopting the above technical solution, the partition semicircular plate serves as a heat transfer medium between the honeycomb carrier and the heating carrier. When the honeycomb carrier does not need to be heated any more, the electromagnet is started, and the electromagnet absorbs the adsorption block, so that the partition semicircular plate is retracted into the annular groove, thereby separating the partition semicircular plate from the honeycomb carrier and the heating carrier. When the electromagnet is powered off, the spring drives the partition semicircular plate to reset, so that the partition semicircular plate reconnects with the heating carrier and the honeycomb carrier.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the initial stage of engine startup, the heating wire heats the heating carrier, and the heat of the heating carrier can be transferred to the honeycomb carrier to preheat the honeycomb carrier, thus avoiding the situation where the heating point directly heats the honeycomb carrier and causes catalyst aging; Moreover, the exhaust gas passes through the heating carrier and then enters the honeycomb carrier. After the exhaust gas is heated first, the heat in the exhaust gas can be quickly transferred to the catalyst surface because the exhaust gas is in direct contact with the catalyst surface. The higher exhaust gas temperature will shorten the time for the catalyst to reach the active temperature, thereby quickly activating the catalytic reaction.

[0028] Under this design, the catalyst itself only needs a small amount of auxiliary heating, and the situation where the heating carrier does not transfer enough heat to the honeycomb carrier is avoided, and the main heating task is completed by exhaust gas heating. This can reduce the direct physical obstruction of the heating device to the catalyst; 2. The heating carrier has the same structure as the honeycomb carrier, which will not affect the emission of gas, reduces the situation where the heating device blocks the exhaust gas, and can reduce the exhaust gas airflow resistance; 3. The heating wire can distribute heat more evenly by shuttling between multiple levels of corrugated plates and annular plates, ensuring the uniformity of the overall heating effect, while reducing the airflow resistance in the exhaust gas purification device and improving the exhaust gas treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the structure of the honeycomb carrier and partition components used in the embodiment of the present application.

[0031] Figure 3 It is a structural schematic diagram used to reflect the distribution of heating wires in an embodiment of the present application.

[0032] Figure 4 yes Figure 1 Enlarged schematic diagram of part A.

[0033] Figure 5 yes Figure 2 Schematic diagram of the enlarged portion B.

[0034] Figure 6 yes Figure 2 Enlarged schematic diagram of part C.

[0035] Explanation of the reference numerals: 1. Insulating shell; 11. Annular groove; 2. Honeycomb carrier; 3. Heating carrier; 31. Annular plate; 311. Plug-in groove; 312. Card groove; 32. Corrugated plate; 4. Partition assembly; 41. Partition semicircular plate; 42. Second temperature sensor; 43. Spring; 44. Electromagnet; 45. Adsorption block; 5. Ring plate core; 51. Extension tube; 52. First temperature sensor; 6. Heating wire; 7. Fixing assembly; 71. First fixing member; 711. First pressure plate; 712. Laminating plate; 713. Bending plate; 714. Elastic plate; 715. Bump; 72. Second fixing member; 721. Second pressure plate; 722. Elastic side plate; 8. Connecting assembly; 81. Connecting seat; 82. Wire tube; 83. External connector. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-6 This application is described in further detail.

[0037] The embodiment of the present application discloses an electrically heated exhaust gas purification device.

[0038] like Figure 1 and Figure 2 The electric heating exhaust gas purification device comprises a heat-insulating shell 1, a honeycomb carrier 2 and a heating carrier 3, both of which are installed in the heat-insulating shell 1, and a partition component 4 is arranged in the heat-insulating shell 1, and the partition component 4 is located between the honeycomb carrier 2 and the heating carrier 3, and the partition component 4 is connected to the heating carrier 3 and the honeycomb carrier 2, and serves as a medium for the heating carrier 3 and the honeycomb carrier 2 to transfer heat. The partition component 4 can also be separated from the heating carrier 3 and the honeycomb carrier 2.

[0039] The heating carrier 3 has the same structure as the honeycomb carrier 2. The heating carrier 3 includes a plurality of annular plates 31 and a plurality of corrugated plates 32. The corrugated plates 32 are annular structures. A corrugated plate 32 is arranged between every two adjacent annular plates 31. An annular plate core 5 is arranged in the heat-insulating outer shell 1. The innermost corrugated plate 32 is sleeved on the annular plate core 5. The annular plate core 5 is coaxially connected with an extension tube 51. The end face of the extension tube 51 facing away from the annular plate core 5 is embedded with a first temperature sensor 52.

[0040] like Figure 1 and Figure 3 The corrugated plate 32 and the annular plate 31 farthest from the central axis of the heat-insulating shell 1 are defined as the first layer of corrugated plate 32 and the first layer of annular plate 31, and the corrugated plate 32 and the annular plate 31 closest to the central axis of the heat-insulating shell 1 are defined as the Nth layer of corrugated plate 32 and the Nth layer of annular plate 31; a plurality of corrugated plates 32 and a plurality of annular plates 31 are connected to the end surfaces facing away from the honeycomb carrier 2 with heating wires 6, and the heating wires 6 are tightly attached to the corrugated plates 32 and the annular plates 31 through a fixing component 7.

[0041] The heating wire 6 extends from the top of the end surface of the first-layer annular plate 31 to the bottom of its end surface, and then bends to enter the bottom of the end surface of the first-layer corrugated plate 32. The heating wire 6 then extends to the top of the end surface of the first-layer corrugated plate 32, and then extends from the top of the end surface of the second-layer annular plate 31 to the bottom of the end surface of the second-layer annular plate 31. The heating wire 6 continues to bend to enter the bottom of the end surface of the second-layer corrugated plate 32, and so on. The heating wire 6 reaches the bottom of the end surface of the Nth layer of corrugated plate 32. Then the heating wire 6 is folded out to the bottom of the end surface of the Nth layer of annular plate 31, and then the heating wire 6 is wound back to the N-1th layer of corrugated plate 32, the N-1th layer of annular plate 31 in sequence, until the top of the end surface of the first layer of annular plate 31.

[0042] A connection component 8 is installed at one end of the heat-insulating shell 1 away from the honeycomb carrier 2 , and both ends of the heating wire 6 are externally connected through the connection component 8 .

[0043] At the initial stage of engine startup, the heating wire 6 heats the heating carrier 3, and the heat of the heating carrier 3 can be transferred to the honeycomb carrier 2 to preheat the honeycomb carrier 2, thereby avoiding the situation where the heating point directly heats the honeycomb carrier 2 and causes catalyst aging; Moreover, the exhaust gas also passes through the heating carrier 3 and then enters the honeycomb carrier 2. After the exhaust gas is heated first, the heat in the exhaust gas can be quickly transferred to the catalyst surface because the exhaust gas is in direct contact with the catalyst surface. A higher exhaust gas temperature will shorten the time it takes for the catalyst to reach the active temperature, thereby quickly activating the catalytic reaction.

[0044] In this design, the catalyst itself only needs a small amount of auxiliary heating, and the situation of insufficient heat transfer from the heating carrier 3 to the honeycomb carrier 2 is avoided, and the main heating task is completed by exhaust gas heating. This can reduce the direct physical obstruction of the heating device to the catalyst.

[0045] At the same time, the heating carrier 3 has the same structure as the honeycomb carrier 2, which will not affect the emission of gas, reduces the situation where the heating device blocks the exhaust gas, and can reduce the exhaust gas flow resistance.

[0046] The heating wire 6 can distribute heat more evenly by shuttling between multiple levels of corrugated plates 32 and annular plates 31, thereby ensuring the uniformity of the overall heating effect, while reducing the airflow resistance in the exhaust gas purification device and improving the exhaust gas treatment efficiency.

[0047] The first temperature sensor 52 is used to detect whether the temperature of the exhaust gas has reached the catalytic requirement. If the catalytic requirement is reached, the first temperature sensor 52 can first control the system to send an instruction to cut off the power to the heating wire 6 to ensure accurate control of the heating system.

[0048] When the honeycomb carrier 2 needs to be heated, the partition component 4 transfers the heat of the heating carrier 3 to the honeycomb carrier 2, thereby preheating the catalyst. When the catalyst reaches the preheating temperature and the exhaust gas still needs to be heated, the partition component 4 is separated from the honeycomb carrier 2 and the heating carrier 3 to avoid continued heating of the honeycomb carrier 2, which may affect the activity of the catalyst.

[0049] like Figure 4 and Figure 5 The fixing assembly 7 includes a first fixing member 71 and a second fixing member 72. The first fixing member 71 is used to fix the heating wire 6 to the annular plate 31, and the second fixing member 72 is used to fix the heating wire 6 to the corrugated plate 32. Each annular plate 31 is provided with a plurality of first fixing members 71, and each corrugated plate 32 is provided with a plurality of second fixing members 72.

[0050] The first fixing member 71 includes a first pressing plate 711, the first pressing plate 711 is connected to a fitting plate 712, the fitting plate 712 is connected to a bending plate 713, the bending plate 713 is connected to an elastic plate 714, a protrusion 715 is installed on the elastic plate 714, a plug-in slot 311 is provided on the side of the annular plate 31 facing the central axis of the heat-insulating shell 1, a clamping slot 312 is provided on the side wall of the plug-in slot 311, the first pressing plate 711 is opposite to the end face of the annular plate 31 and presses the heating wire 6, the fitting plate 712 is fitted with the annular plate 31, the elastic plate 714 is inserted into the plug-in slot 311, and the protrusion 715 is located in the clamping slot 312.

[0051] The first pressing plate 711 can press the heating wire 6 by simply inserting the elastic plate 714 into the plug-in slot 311 and snapping the protrusion 715 into the snap-in slot 312 . The design of the laminating plate 712 is conducive to reducing the obstruction to the exhaust gas.

[0052] The second fixing member 72 includes a second pressing plate 721 , which is connected to an elastic side plate 722 . The second pressing plate 721 faces the end surface of the corrugated plate 32 and presses the heating wire 6 . The elastic side plate 722 fits the side surface of the corrugated plate 32 .

[0053] The design of the second pressing plate 721 and the elastic side plate 722 can ensure that the heating wire 6 fits tightly to the corrugated plate 32 , thereby ensuring the efficiency of heat transfer and reducing the resistance of the corrugated plate 32 to airflow.

[0054] The specific number and distribution positions of the first fixing members 71 and the second fixing members 72 can be determined according to the design situation to ensure that the heating wire can be stably attached to the end surfaces of the annular plate and the corrugated plate.

[0055] like Figure 1 The connecting assembly 8 includes a connecting seat 81, which is installed on the heat-insulating shell 1. The connecting seat 81 is equipped with two wire tubes 82. The two ends of the heating wire 6 are respectively located in the two wire tubes 82. An external joint 83 is installed in the wire tube 82, and the external joint 83 is connected to the heating wire 6.

[0056] The connection base 81 and the wire tube 82 can ensure that the power supply connection of the heating wire 6 is safer and more reliable. The connection method between the external connector 83 in the wire tube 82 and the heating wire 6 is not only convenient for installation and maintenance, but also can prevent the electrical connection problem of the heating wire 6 in a high temperature environment, thereby improving the working stability of the entire device.

[0057] like Figure 6The partition assembly 4 includes a partition semicircular plate 41. The two partition semicircular plates 41 are spliced ​​together to form a plate with the same size as the annular plate 31 of the first layer. The end surface of the partition semicircular plate 41 facing away from the annular plate 31 is embedded with a second temperature sensor 42. The heat-insulating shell 1 is provided with an annular groove 11, which corresponds to the partition semicircular plate 41. A plurality of springs 43 are arranged in the annular groove 11, and the springs 43 are connected to the partition semicircular plate 41. An electromagnet 44 is arranged in the annular groove 11. An adsorption block 45 is arranged on the partition semicircular plate 41, and the electromagnet 44 is directly opposite to the adsorption block 45.

[0058] The partition semicircular plate 41 serves as a heat transfer medium between the honeycomb carrier 2 and the heating carrier 3. When the honeycomb carrier 2 does not need to be heated any more, the electromagnet 44 is started, and the electromagnet 44 attracts the adsorption block 45, so that the partition semicircular plate 41 is retracted into the annular groove 11, thereby separating the partition semicircular plate 41 from the honeycomb carrier 2 and the heating carrier 3. When the electromagnet 44 is powered off, the spring 43 drives the partition semicircular plate 41 to reset, so that the partition semicircular plate 41 reconnects with the heating carrier 3 and the honeycomb carrier 2.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electrically heated exhaust gas purification device, characterized in that: The invention comprises a heat-insulating outer shell (1), a honeycomb carrier (2) and a heating carrier (3), wherein the honeycomb carrier (2) is connected to the heating carrier (3), the heating carrier (3) and the honeycomb carrier (2) have the same structure, the honeycomb carrier (2) and the heating carrier (3) are both located in the heat-insulating outer shell (1), a heating wire (6) is arranged on an end face of the heating carrier (3) away from the honeycomb carrier (2), the heat-insulating outer shell (1) is connected to a connecting component (8) for externally connecting the heating wire (6), and a fixing component (7) for fixing the heating wire (6) is installed on the heating carrier (3).

2. The electric heating exhaust gas purification device according to claim 1 is characterized in that: The heating carrier (3) comprises a plurality of annular plates (31) and a plurality of corrugated plates (32); the corrugated plates (32) are annular structures, and one corrugated plate (32) is arranged between every two adjacent annular plates (31); the fixing assembly (7) comprises a first fixing member (71) and a second fixing member (72); the first fixing member (71) is used to fix the heating wire (6) to the annular plate (31), and the second fixing member (72) is used to fix the heating wire (6) to the corrugated plate (32).

3. The electric heating exhaust gas purification device according to claim 2 is characterized in that: The heating wire (6) extends from the top of the end surface of the outermost annular plate (31) along to the bottom of its end surface and bends into the bottom of the end surface of the outermost corrugated plate (32), then the heating wire (6) extends to the top of the end surface of the outermost corrugated plate (32), then from the top of the end surface of the second annular plate (31) along the bottom of the end surface of the second annular plate (31), then the heating wire (6) bends into the bottom of the end surface of the second corrugated plate (32), and so on. After reaching the bottom of the end surface of the innermost corrugated plate (32), the heating wire (6) is folded out to the bottom of the end surface of the innermost annular plate (31), and then the heating wire (6) is sequentially wound back to the top of the end surface of the outermost annular plate (31).

4. The electric heating exhaust gas purification device according to claim 3 is characterized in that: The first fixing assembly (7) comprises a first pressing plate (711), the first pressing plate (711) is connected to a bonding plate (712), the bonding plate (712) is connected to a bending plate (713), the bending plate (713) is connected to an elastic plate (714), a protrusion (715) is installed on the elastic plate (714), a plug-in slot (311) is provided on the side of the annular plate (31) facing the central axis of the heat-insulating shell (1), a clamping slot (312) is provided on the side wall of the plug-in slot (311), the first pressing plate (711) faces the end face of the annular plate (31) and presses the heating wire (6), the bonding plate (712) is bonded to the annular plate (31), the elastic plate (714) is inserted into the plug-in slot (311), and the protrusion (715) is located in the clamping slot (312).

5. The electric heating exhaust gas purification device according to claim 3 is characterized in that: The second fixing assembly (7) comprises a second pressing plate (721), and the second pressing plate (721) is connected to an elastic side plate (722). The second pressing plate (721) faces the end surface of the corrugated plate (32) and presses the heating wire (6), and the elastic side plate (722) fits against the side surface of the corrugated plate (32).

6. The electric heating exhaust gas purification device according to claim 3 is characterized in that: The connection assembly (8) comprises a connection seat (81), the connection seat (81) being mounted on the heat-insulating outer shell (1), the connection seat (81) being mounted with two wire-passing tubes (82), the two ends of the heating wire (6) being respectively located in the two wire-passing tubes (82), an external joint (83) being mounted in the wire-passing tubes (82), and the external joint (83) being connected to the heating wire (6).

7. The electric heating exhaust gas purification device according to claim 3 is characterized in that: A ring plate core (5) is arranged inside the heat-insulating outer shell (1), the innermost corrugated plate (32) is sleeved on the ring plate core (5), and a first temperature sensor (52) is arranged on the end surface of the ring plate core (5) facing away from the honeycomb carrier (2).

8. The electric heating exhaust gas purification device according to claim 7 is characterized in that: The ring plate core (5) is coaxially connected to an extension tube (51), and the first temperature sensor (52) is arranged on the end surface of the extension tube (51) facing away from the ring plate core (5).

9. The electrically heated exhaust gas purification device according to claim 3, characterized in that: A partition component (4) is provided between the honeycomb carrier (2) and the heating carrier (3), and the partition component (4) is connected to the honeycomb carrier (2) and the heating carrier (3).

10. The electric heating exhaust gas purification device according to claim 9, characterized in that: The partition assembly (4) comprises a partition semicircular plate (41), two of the partition semicircular plates (41) are spliced ​​together to form a plate of the same size as the outermost annular plate (31), a second temperature sensor (42) is embedded in the end surface of the partition semicircular plate (41) facing away from the annular plate (31), the heat insulation shell (1) is provided with an annular groove (11), the annular groove (11) corresponds to the partition semicircular plate (41), a plurality of springs (43) are arranged in the annular groove (11), the springs (43) are connected to the partition semicircular plate (41), an electromagnet (44) is arranged in the annular groove (11), an adsorption block (45) is arranged on the partition semicircular plate (41), and the electromagnet (44) is directly opposite to the adsorption block (45).

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