Electric heating catalytic purification converter

Abstract

The invention relates to an electric heating catalytic purification converter, which belongs to the technical field of tail gas treatment, and comprises a gas inlet pipe, the gas inlet pipe is connected with a shell, a honeycomb carrier is mounted in the shell, one end, far away from the gas inlet pipe, of the shell is connected with a front catalyst, and one end, far away from the gas inlet pipe, of the front catalyst is connected with an exhaust pipe. The air inlet pipe is communicated with an electric heating gas heating assembly, a ventilation assembly is installed on the electric heating gas heating assembly, the ventilation assembly is used for extracting air into the electric heating gas heating assembly, and the electric heating gas heating assembly is used for heating the air and discharging the heated air into the air inlet pipe. The method has the effects that the conditions of sintering, inactivation, poisoning and the like of the catalyst caused by over-high local temperature of the honeycomb carrier during heating are reduced, and the tail gas purification effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of exhaust gas treatment, and in particular to an electrically heated catalytic purification converter. Background Art

[0002] The electrically heated catalyst heats the catalyst by passing an electric current directly into the honeycomb substrate or its internal metal structure, using the resistance of the material to generate heat. However, there may be some inhomogeneities in the microstructure of the honeycomb substrate itself, such as grain boundaries, impurities, or tiny defects in the material. These microscopic differences may lead to slight differences in resistance in local areas, and the honeycomb substrate is usually a porous body with a complex structure. This complex geometry will affect the flow of current. In particular, the current density may change at the edges and corners of the honeycomb due to the electric field concentration effect (similar to the "tip effect"). At the same time, there may be slight differences in the thickness of the catalyst in different areas. Under the influence of various factors, the honeycomb substrate will cause local overheating, which can easily lead to catalyst sintering and deactivation, catalyst poisoning, and accelerated catalyst aging. Summary of the invention

[0003] In order to reduce the sintering, deactivation and poisoning of the catalyst caused by local overtemperature of the honeycomb carrier during heating and improve the purification effect of exhaust gas, the present application provides an electrically heated catalytic purification converter.

[0004] The present application provides an electrically heated catalytic converter that adopts the following technical solution: An electrically heated catalytic purification converter comprises an intake pipe, the intake pipe is connected to a shell, a honeycomb carrier is installed in the shell, the end of the shell away from the intake pipe is connected to a front catalyst, the end of the front catalyst away from the intake pipe is connected to an exhaust pipe, the intake pipe is connected to an electrically heated gas heating component, a ventilation component is installed on the electrically heated gas heating component, the ventilation component is used to draw air into the electrically heated gas heating component, and the electrically heated gas heating component is used to heat the air and discharge the heated air into the intake pipe.

[0005] By adopting the above technical solution, the ventilation component will be controlled to be introduced into the electric heating gas heating component, and then the electric heating gas heating component will heat the air before discharging it into the intake pipe. The heated air is mixed with the exhaust gas to increase the temperature and then discharged into the honeycomb carrier.

[0006] Due to the introduction of heated air, the exhaust gas and heated air are fully mixed before entering the honeycomb substrate. This preheating process makes the overall airflow temperature more uniform, thereby helping the catalyst to quickly reach the working temperature. Compared with the traditional method of directly heating the honeycomb substrate, this method avoids the risk of local overheating of the catalyst surface, while ensuring that the catalytic reaction can proceed evenly and quickly over a larger range, greatly improving the purification efficiency.

[0007] At the same time, by avoiding direct heating of the honeycomb carrier, the problems of catalyst sintering, thermal aging and deactivation caused by local high temperature are reduced. This heating method effectively reduces the risk of catalyst poisoning, maintains the long-term activity of the catalyst, and extends its service life. Compared with traditional heating methods, the working life of the catalyst has been significantly extended.

[0008] Moreover, after the heated air is mixed with the exhaust gas, it not only increases the temperature, but also effectively dilutes the concentration of harmful substances in the exhaust gas. The diluted exhaust gas entering the catalytic purifier can undergo a more efficient redox reaction, ensuring that more harmful substances (such as hydrocarbons, carbon monoxide, and nitrogen oxides) are converted into harmless substances. Especially during cold start, the system can quickly heat the exhaust gas to the ideal catalytic temperature, reducing the situation where harmful substances are directly discharged without being fully treated.

[0009] Optionally, the electrically heated gas heating component includes a filter element, the filter element is connected to the ventilation component, the ventilation component is connected to a first heating exhaust element, the first heating exhaust element is connected to a second heating exhaust element, the second heating exhaust element is connected to the air inlet pipe, and a reflux chamber is arranged between the first heating exhaust element and the second heating exhaust element.

[0010] By adopting the above technical solution, the air can be heated by the first heating exhaust component, and then stay in the reflux chamber and exhaust the second heating exhaust component for heating. This design realizes the function of multi-stage heating. The air first passes through the first heating exhaust component for preliminary heating, which can be applied in low-temperature exhaust gas treatment. When the exhaust gas temperature is low, only the first heating exhaust component needs to be started. If a higher temperature air is required, the second heating exhaust component is started to further heat the gas.

[0011] Optionally, the filter element includes a first connecting sleeve, an end of the first connecting sleeve away from the ventilation component is provided with an annular step groove, the annular step groove is threadedly connected to a connecting ring, an adjustment groove is provided on the connecting ring, and a filter net is installed in the connecting ring.

[0012] By adopting the above technical solution, by setting an annular stepped groove and a threaded connection ring in the filter element, it is convenient for users to disassemble and replace the filter screen, and a modular design of the filter assembly is realized. This structure makes equipment maintenance more convenient, and the tightness of the filter screen can be flexibly adjusted through the adjustment groove.

[0013] Optionally, the ventilation assembly includes a second connecting sleeve, the first connecting sleeve and the second connecting sleeve are threadedly connected, a first sealing ring is arranged between the first connecting sleeve and the second connecting sleeve, a motor is installed on the second connecting sleeve, a ventilation plate is installed in the second connecting sleeve, a plurality of ventilation holes are opened on the ventilation plate, the ventilation plate is coaxially connected to a rotating shaft, the rotating shaft is connected to fan blades, a first bevel gear is installed on the rotating shaft, the motor is connected to a connecting shaft, the connecting shaft penetrates into the second connecting sleeve and is rotatably connected to the ventilation plate, a second bevel gear is installed on the connecting shaft, and the first bevel gear is meshed with the second bevel gear.

[0014] By adopting the above technical solution, the motor drives the connecting shaft to rotate, the connecting shaft drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, and the first bevel gear drives the connecting shaft to rotate, so that the connecting shaft drives the fan blades to rotate, and the fan blades send air to the first heating exhaust component for heating.

[0015] Optionally, the first heating exhaust component includes a third connecting sleeve, which is threadedly connected to the second connecting sleeve, a second sealing ring is arranged between the third connecting sleeve and the second connecting sleeve, a heating carrier is installed in the third connecting sleeve, and the heating carrier is honeycomb-shaped, and an electric heating connecting head is installed on the third connecting sleeve, and the electric heating connecting head is connected to the heating carrier.

[0016] By adopting the above technical solution, the honeycomb heating carrier can increase the contact area between the gas and the heating surface, significantly improving the heating efficiency. At the same time, the electric heating connector is directly connected to the heating carrier, making the heat transfer more efficient, and the whole structure is simple and compact, which is easy to install and maintain.

[0017] Optionally, the second heating exhaust member includes a fourth connecting sleeve, an inner mounting shell is arranged in the fourth connecting sleeve, the inner mounting shell is connected to the bottom of the fourth connecting sleeve through a connecting seat, a plurality of exhaust channels are arranged between the fourth connecting sleeve and the inner mounting shell, a third sealing ring is arranged between the fourth connecting sleeve and the third connecting sleeve, and the fourth connecting sleeve is threadedly connected to the intake pipe; An exhaust base is arranged in a chamber formed by the inner mounting shell and the fourth connecting sleeve, and the exhaust base is a cavity structure. A plurality of diverter pipes are connected to the exhaust base, and the diverter pipes extend into the exhaust channel. The diverter pipes are connected to the air inlet pipe. The inner mounting shell, the diverter pipes, the exhaust base and the fourth connecting sleeve jointly surround the reflux cavity, and a heating wire is arranged on the outer side wall of each diverter pipe facing the reflux cavity, and the heating wire extends out of the fourth connecting sleeve.

[0018] By adopting the above technical solution, the air stays in the reflux cavity after the first stage of heating. At this time, the heating wire can heat the air again. After the air enters the exhaust base, it is discharged to the diverter pipe. The heating wire heats the diverter pipe and can heat the air again, ensuring that the air is fully heated before being discharged into the intake pipe.

[0019] Optionally, the diverter pipe is a U-shaped pipe, which extends from the exhaust base toward the direction close to the honeycomb carrier and bends to extend into the exhaust channel, and the inner diameter of the diverter pipe gradually decreases from one end close to the exhaust base to one end close to the air inlet pipe.

[0020] By adopting the above technical solution, the flow rate of the gas in the diverter pipe will gradually increase when it is discharged, so that the heated air can be discharged into the intake pipe at a faster flow rate, so that the heated air can be mixed with the exhaust gas more evenly.

[0021] Optionally, the fourth connecting sleeve is provided with a detection channel, the detection channel corresponds one-to-one to the shunt tube, the shunt tube is provided with a detection port connected to the detection channel, the fourth connecting sleeve is connected to a temperature sensor, and the temperature sensor blocks one end of the detection channel.

[0022] By adopting the above technical solution and arranging a detection channel and a temperature sensor in the fourth connecting sleeve, the temperature of the airflow can be monitored in real time to ensure that the gas achieves a predetermined heating effect.

[0023] Optionally, the exhaust pipe is connected to a return pipe, the return pipe is connected to the interior of the second connecting sleeve, and the exhaust end of the return pipe is located above the fan blade.

[0024] By adopting the above technical solution, part of the exhaust gas can be discharged into the first heating exhaust member through the reflux pipe for heating. By recycling the exhaust gas, the combustion temperature can be controlled to further reduce the generation of pollutants. At the same time, the use of exhaust gas recirculation can reduce the demand for external air and improve energy efficiency.

[0025] Optionally, the intake pipe is threadedly connected to the shell, the shell is threadedly connected to the front catalyst, and the front catalyst is threadedly connected to the exhaust pipe.

[0026] By adopting the above technical solution, the threaded connection structural design facilitates the disassembly and assembly of the components, and facilitates the maintenance and replacement of the equipment. At the same time, the threaded connection also improves the air tightness of the system, avoids gas leakage, ensures the safe operation of the system, and improves the efficiency of exhaust gas purification.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. Due to the introduction of heated air, the exhaust gas and heated air are fully mixed before entering the honeycomb carrier. This preheating process makes the overall airflow temperature more uniform, thereby helping the catalyst to quickly reach the working temperature. Compared with the traditional method of directly heating the honeycomb carrier, this method avoids the risk of local overheating of the catalyst surface, while ensuring that the catalytic reaction can proceed evenly and quickly over a larger range, greatly improving the purification efficiency; 2. At the same time, by avoiding direct heating of the honeycomb carrier, the problems of catalyst sintering, thermal aging and deactivation caused by local high temperature are reduced. This heating method effectively reduces the risk of catalyst poisoning, maintains the long-term activity of the catalyst, and extends its service life. Compared with traditional heating methods, the working life of the catalyst has been significantly extended; 3. After the heated air is mixed with the exhaust gas, it not only increases the temperature, but also effectively dilutes the concentration of harmful substances in the exhaust gas. The diluted exhaust gas entering the catalytic purifier can undergo a more efficient redox reaction, ensuring that more harmful substances (such as hydrocarbons, carbon monoxide, and nitrogen oxides) are converted into harmless substances. Especially during cold start, the system can quickly heat the exhaust gas to the ideal catalytic temperature, reducing the situation where harmful substances are directly discharged without being fully treated. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0030] Figure 3 It is a structural schematic diagram of a cellular carrier used to embody an embodiment of the present application.

[0031] Figure 4 yes Figure 3 Schematic diagram of the enlarged portion B.

[0032] Figure 5 It is a schematic diagram of the structure of the shunt tube used in the embodiment of the present application.

[0033] Explanation of the reference numerals: 1. intake pipe; 2. housing; 3. honeycomb carrier; 4. front catalyst; 5. exhaust pipe; 6. electrically heated gas heating assembly; 61. filter element; 611. first connecting sleeve; 6111. annular stepped groove; 612. connecting ring; 6121. adjusting groove; 613. filter screen; 62. first heating exhaust element; 621. third connecting sleeve; 622. second sealing ring; 623. heating carrier; 624. electrically heated connector; 63. second heating exhaust element; 631. fourth connecting sleeve; 632. third Sealing ring; 633, connecting seat; 634, inner mounting shell; 635, exhaust channel; 636, shunt pipe; 6361, detection port; 637, heating wire; 638, detection channel; 639, temperature sensor; 630, exhaust base; 64, reflux chamber; 7, ventilation assembly; 71, second connecting sleeve; 72, first sealing ring; 73, motor; 74, ventilation plate; 741, ventilation port; 75, rotating shaft; 76, first bevel gear; 77, connecting shaft; 78, second bevel gear; 79, fan blade; 8, reflux pipe. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The embodiment of the present application discloses an electrically heated catalytic converter.

[0036] like Figure 1 , Figure 2 and Figure 3 The electrically heated catalytic purification converter comprises an intake pipe 1, the intake pipe 1 is threadedly connected with a shell 2, a honeycomb carrier 3 is installed in the shell 2, the end of the shell 2 away from the intake pipe 1 is threadedly connected with a front catalyst 4, the end of the front catalyst 4 away from the intake pipe 1 is threadedly connected with an exhaust pipe 5, the exhaust port diameters of the intake pipe 1 and the exhaust pipe 5 are both larger than the diameters of their respective intake ends, and the intake pipe 1 and the exhaust pipe 5 are combined pipes of a conical cone and a cylindrical tail.

[0037] The air inlet pipe 1 is connected to an electric heating gas heating component 6, on which a ventilation component 7 is installed. The ventilation component 7 is used to draw air into the electric heating gas heating component 6. The electric heating gas heating component 6 is used to heat the air and discharge the heated air into the air inlet pipe 1. The exhaust pipe 5 is connected to a return pipe 8, which is connected to the electric heating gas heating component 6.

[0038] The ventilation component 7 controls the introduction of the electric heating gas heating component 6, and then the electric heating gas heating component 6 heats the air before discharging it into the air intake pipe 1. The heated air is mixed with the exhaust gas to increase the temperature and then discharged into the honeycomb carrier 3.

[0039] Due to the introduction of heated air, the exhaust gas and the heated air are fully mixed before entering the honeycomb carrier 3. This preheating process makes the overall airflow temperature more uniform, thereby helping the catalyst to quickly reach the working temperature. Compared with the traditional method of directly heating the honeycomb carrier 3, this method avoids the risk of local overheating of the catalyst surface, while ensuring that the catalytic reaction can be carried out uniformly and quickly over a larger range, greatly improving the purification efficiency.

[0040] At the same time, by avoiding direct heating of the honeycomb substrate 3, the problems of catalyst sintering, thermal aging and deactivation caused by local high temperature are reduced. This heating method effectively reduces the risk of catalyst poisoning, maintains the long-term activity of the catalyst, and extends its service life. Compared with traditional heating methods, the working life of the catalyst is significantly extended.

[0041] Moreover, after the heated air is mixed with the exhaust gas, it not only increases the temperature, but also effectively dilutes the concentration of harmful substances in the exhaust gas. The diluted exhaust gas entering the catalytic purifier can undergo a more efficient redox reaction, ensuring that more harmful substances (such as hydrocarbons, carbon monoxide, and nitrogen oxides) are converted into harmless substances. Especially during cold start, the system can quickly heat the exhaust gas to the ideal catalytic temperature, reducing the situation where harmful substances are directly discharged without being fully treated.

[0042] like Figure 1 and Figure 4 The electric heating gas heating component 6 includes a filter element 61, the filter element 61 is connected to the ventilation component 7, the ventilation component 7 is connected to a first heating exhaust component 62, the first heating exhaust component 62 is connected to a second heating exhaust component 63, the second heating exhaust component 63 is connected to the air intake pipe 1, and a reflux cavity 64 is arranged between the first heating exhaust component 62 and the second heating exhaust component 63.

[0043] like Figure 2 The filter element 61 includes a first connecting sleeve 611, and an annular step groove 6111 is provided at one end of the first connecting sleeve 611 away from the ventilation assembly 7. A connecting ring 612 is threadedly connected to the annular step groove 6111. An adjusting groove 6121 is provided on the top surface of the connecting ring 612. The adjusting groove 6121 is provided for a person to reach into and rotate the connecting ring 612. A filter screen 613 is installed in the connecting ring 612, and the outer periphery of the filter screen 613 is welded to the inner wall of the connecting ring 612.

[0044] like Figure 5The ventilation assembly 7 includes a second connecting sleeve 71, an annular protrusion is arranged on the bottom surface of the first connecting sleeve 611, an annular groove is arranged on the top surface of the second connecting sleeve 71, the annular protrusion is threadedly connected to the annular groove, a first sealing ring 72 is arranged between the first connecting sleeve 611 and the second connecting sleeve 71, a motor 73 is installed on the outer wall of the second connecting sleeve 71, a ventilation plate 74 is installed in the second connecting sleeve 71, the ventilation plate 74 is a circular plate, a plurality of ventilation holes 741 are opened on the ventilation plate 74, the ventilation plate 74 is coaxially connected with a rotating shaft 75, the rotating shaft 75 is connected with a fan blade 79, the ventilation plate 74 is located between the fan blade 79 and the filter 613, a first bevel gear 76 is installed on the rotating shaft 75, the motor 73 is connected with a connecting shaft 77, the connecting shaft 77 penetrates the second connecting sleeve 71 and the ventilation plate 74, and the connecting shaft 77 is rotatably connected with the ventilation plate 74. A second bevel gear 78 is mounted on the connecting shaft 77. The second bevel gear 78 and the first bevel gear 76 are both located in the ventilation plate 74 and mesh with each other. The first bevel gear 76 meshes with the second bevel gear 78. The return pipe 8 is connected to the inside of the second connecting sleeve 71, and the exhaust end of the return pipe 8 is located above the ventilation plate 74.

[0045] like Figure 4 The first heating exhaust member 62 includes a third connecting sleeve 621, an annular protrusion is arranged on the bottom surface of the second connecting sleeve 71, an annular groove is arranged on the top surface of the third connecting sleeve 621, the annular protrusion is threadedly connected to the annular groove, a second sealing ring 622 is arranged between the second connecting sleeve 71 and the third connecting sleeve 621, a heating carrier 623 is installed in the third connecting sleeve 621, the heating carrier 623 is honeycomb-shaped, an electric heating connector 624 is installed on the outer wall of the third connecting sleeve 621, and the electric heating connector 624 is connected to the heating carrier 623.

[0046] like Figure 4 and Figure 5 The second heating exhaust member 63 includes a fourth connecting sleeve 631, an annular protrusion is arranged on the bottom surface of the third connecting sleeve 621, an annular groove is arranged on the top surface of the fourth connecting sleeve 631, the annular protrusion is threadedly connected to the annular groove, and a third sealing ring 632 is arranged between the third connecting sleeve 621 and the fourth connecting sleeve 631.

[0047] The fourth connecting sleeve 631 is provided with an annular protrusion on the outer periphery of the bottom surface, and the intake pipe 1 is connected with a protruding sleeve, and the annular protrusion is threadedly connected with the protruding sleeve. The bottom of the fourth connecting sleeve 631 is bolted with a plurality of connecting seats 633, and the plurality of connecting seats 633 are bolted together with an inner mounting shell 634, and a plurality of exhaust passages 635 are enclosed between the fourth connecting sleeve 631 and the inner mounting shell 634.

[0048] Each exhaust channel 635 is provided with a matching shunt pipe 636, which is a U-shaped pipe, one end of which is connected to the intake pipe 1, and the other end of which is located in the chamber formed by the inner mounting seat and the fourth connecting sleeve 631. The inner mounting shell 634, the shunt pipe 636, the exhaust base 630 and the fourth connecting sleeve 631 together surround the reflux cavity 64, and each shunt pipe 636 is provided with a heating wire 637 on the outer side wall facing the reflux cavity 64, and the heating wire 637 extends out of the fourth connecting sleeve 631. The inner diameter of the shunt pipe 636 gradually decreases from the end close to the exhaust base 630 to the end close to the intake pipe 1.

[0049] The fourth connecting sleeve 631 is provided with a detection channel 638, which corresponds one-to-one to the shunt tube 636. The shunt tube 636 is provided with a detection port 6361 connected to the detection channel 638. A temperature sensor 639 is installed on the outer wall of the fourth connecting sleeve 631, and the temperature sensor 639 blocks one end of the detection channel 638.

[0050] The motor 73 drives the connecting shaft 77 to rotate, the connecting shaft 77 drives the second bevel gear 78 to rotate, the second bevel gear 78 drives the first bevel gear 76 to rotate, so that the rotating shaft 75 and the fan blade 79 rotate, and the air passes through the filter 613 and enters the ventilation plate 74 and the heating carrier 623 in sequence, and then the air stays in the reflux chamber 64 and then enters the shunt pipe 636, and finally is discharged from the shunt pipe 636 to the intake pipe 1. At the same time, part of the processed exhaust gas directly enters the second connecting sleeve 71 to mix with the air, and passes through the heating carrier 623 and the shunt pipe 636 together with the air.

[0051] The implementation principle of the embodiment of the present application is: the air can be heated at the first level by the heating carrier 623, and then stay in the reflux cavity 64. At this time, the heating wire 637 can heat the air again, and then after the air enters the shunt pipe 636, the heating wire 637 heats the air again. The honeycomb heating carrier 623 can increase the contact area between the gas and the heating surface, significantly improving the heating efficiency. This design realizes the function of multi-stage heating. The air first undergoes preliminary heating by the heating carrier 623, which can be applied to low-temperature exhaust gas treatment. When the required exhaust gas temperature is low, it is only necessary to start the heating carrier 623. If a higher temperature air is required to increase the temperature of the exhaust gas, the heating wire 637 is started to further heat the gas.

[0052] The flow rate of the gas in the shunt pipe 636 will gradually increase when it is discharged, so that the heated air can be discharged into the intake pipe 1 at a faster flow rate, so that the heated air can be mixed with the exhaust gas more evenly. At the same time, the partially heated air can be discharged to the detection channel 638 for temperature detection. If the gas temperature does not meet the standard, the temperature of the heating wire 637 and the heating carrier 623 can be adjusted in time. The temperature of the airflow is monitored in real time to ensure that the gas reaches the predetermined heating effect.

[0053] Moreover, part of the exhaust gas can be recycled through the reflux pipe 8 to further reduce the generation of pollutants. At the same time, the use of exhaust gas recycling can reduce the demand for external air and improve energy efficiency.

[0054] 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 catalytic converter, characterized in that: The invention comprises an air intake pipe (1), wherein the air intake pipe (1) is connected to a shell (2), a honeycomb carrier (3) is installed in the shell (2), one end of the shell (2) away from the air intake pipe (1) is connected to a front catalyst (4), one end of the front catalyst (4) away from the air intake pipe (1) is connected to an exhaust pipe (5), the air intake pipe (1) is connected to an electric heating gas heating component (6), a ventilation component (7) is installed on the electric heating gas heating component (6), the ventilation component (7) is used to draw air into the electric heating gas heating component (6), and the electric heating gas heating component (6) is used to heat air and discharge the heated air into the air intake pipe (1).

2. The electrically heated catalytic converter according to claim 1, characterized in that: The electrically heated gas heating component (6) comprises a filter element (61), the filter element (61) is connected to the ventilation component (7), the ventilation component (7) is connected to a first heating exhaust element (62), the first heating exhaust element (62) is connected to a second heating exhaust element (63), the second heating exhaust element (63) is connected to the air inlet pipe (1), and a reflux chamber (64) is provided between the first heating exhaust element (62) and the second heating exhaust element (63).

3. The electrically heated catalytic converter according to claim 2, characterized in that: The filter element (61) comprises a first connecting sleeve (611), an end of the first connecting sleeve (611) away from the ventilation assembly (7) is provided with an annular stepped groove (6111), the annular stepped groove (6111) is threadedly connected to a connecting ring (612), an adjusting groove (6121) is provided on the connecting ring (612), and a filter net (613) is installed in the connecting ring (612).

4. The electrically heated catalytic converter according to claim 3, characterized in that: The ventilation assembly (7) comprises a second connecting sleeve (71), the first connecting sleeve (611) and the second connecting sleeve (71) are threadedly connected, a first sealing ring (72) is arranged between the first connecting sleeve (611) and the second connecting sleeve (71), a motor (73) is installed on the second connecting sleeve (71), a ventilation plate (74) is installed in the second connecting sleeve (71), a plurality of ventilation holes (741) are opened on the ventilation plate (74), the ventilation plate (74) is coaxially rotatably connected with a rotating shaft (75), the rotating shaft (75) is connected with a fan blade (79), a first bevel gear (76) is installed on the rotating shaft (75), the motor (73) is connected with a connecting shaft (77), the connecting shaft (77) penetrates into the second connecting sleeve (71) and is rotatably connected with the ventilation plate (74), a second bevel gear (78) is installed on the connecting shaft (77), and the first bevel gear (76) is meshed with the second bevel gear (78).

5. The electrically heated catalytic converter according to claim 4, characterized in that: The first heating exhaust component (62) comprises a third connecting sleeve (621), the third connecting sleeve (621) is threadedly connected to the second connecting sleeve (71), a second sealing ring (622) is arranged between the third connecting sleeve (621) and the second connecting sleeve (71), a heating carrier (623) is installed in the third connecting sleeve (621), the heating carrier (623) is honeycomb-shaped, and an electric heating connector (624) is installed on the third connecting sleeve (621), and the electric heating connector (624) is connected to the heating carrier (623).

6. The electrically heated catalytic converter according to claim 5, characterized in that: The second heating exhaust member (63) comprises a fourth connecting sleeve (631), an inner mounting shell (634) is arranged inside the fourth connecting sleeve (631), the inner mounting shell (634) is connected to the bottom of the fourth connecting sleeve (631) via a connecting seat (633), a plurality of exhaust channels (635) are arranged between the fourth connecting sleeve (631) and the inner mounting shell (634), a third sealing ring (632) is arranged between the fourth connecting sleeve (631) and the third connecting sleeve (621), and the fourth connecting sleeve (631) is threadedly connected to the intake pipe (1); The inner mounting shell (634) and the fourth connecting sleeve (631) form a chamber in which an exhaust base (630) is arranged. The exhaust base (630) is a hollow structure. The exhaust base (630) is connected to a plurality of shunt pipes (636). The shunt pipes (636) extend into the exhaust channel (635). The shunt pipes (636) are connected to the air inlet pipe (1). The inner mounting shell (634), the shunt pipes (636), the exhaust base (630) and the fourth connecting sleeve (631) jointly surround the reflux chamber (64). A heating wire (637) is arranged on the outer side wall of each shunt pipe (636) facing the reflux chamber (64). The heating wire (637) extends out of the fourth connecting sleeve (631).

7. The electrically heated catalytic converter according to claim 6, characterized in that: The diverter pipe (636) is a U-shaped pipe, and the diverter pipe (636) extends from the exhaust base (630) toward the direction close to the honeycomb carrier (3) and bends to extend into the exhaust channel (635). The inner diameter of the diverter pipe (636) gradually decreases from one end close to the exhaust base (630) to one end close to the air inlet pipe (1).

8. The electrically heated catalytic converter according to claim 6, characterized in that: The fourth connecting sleeve (631) is provided with a detection channel (638), and the detection channel (638) corresponds one-to-one to the shunt tube (636). The shunt tube (636) is provided with a detection port (6361) connected to the detection channel (638). The fourth connecting sleeve (631) is connected to a temperature sensor (639), and the temperature sensor (639) blocks one end of the detection channel (638).

9. The electrically heated catalytic converter according to claim 4, characterized in that: The exhaust pipe (5) is connected to a return pipe (8), the return pipe (8) is connected to the interior of the second connecting sleeve (71), and the exhaust end of the return pipe (8) is located above the fan blade (79).

10. The electrically heated catalytic converter according to claim 1, characterized in that: The air intake pipe (1) is threadedly connected to the housing (2), the housing (2) is threadedly connected to the front catalyst (4), and the front catalyst (4) is threadedly connected to the exhaust pipe (5).

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