Motor vehicle exhaust catalytic purifier and using method

Abstract

The invention belongs to the technical field of three-way catalytic converters, and particularly relates to a motor vehicle exhaust catalytic purifier and a using method. The complementary catalysis assembly comprises a movable carrier, a fixed carrier and a mounting ring; each of the movable carrier and the fixed carrier consists of an end plate and a group of circular rings with different diameters; a group of connecting rods are fixedly connected between the end plate and the plurality of circular rings respectively; a group of through holes are uniformly distributed in the surface of the end plate; the surface of the circular ring is coated with a catalytic coating; the circular ring of the movable carrier is inserted into the circular ring gap of the fixed carrier during movement, mutual friction and scraping between the movable carrier and the circular ring of the fixed carrier are promoted, and particles attached to the surfaces of the movable carrier and the fixed carrier can be scraped, so that mutual cleaning of the movable carrier and the fixed carrier is achieved, and the attaching and blocking phenomena of the carriers are reduced; the follow-up tail gas treatment effect of the two is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of three-way catalytic converters, and specifically relates to a motor vehicle exhaust gas catalytic purifier and a usage method thereof. Background Art

[0002] A three-way catalytic converter is an automobile emission control device widely used in modern internal combustion engine vehicles. It is mainly used to reduce harmful substances in automobile exhaust gases. Its working principle is based on catalytic reactions, which convert carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) in the exhaust gases into harmless gases through chemical reactions. However, there are still a large number of solid suspended particulate matters in the exhaust gases. Especially when the engine is in poor condition or the fuel is incompletely burned, the particulate matters will adhere to the internal structure of the three-way catalytic converter, resulting in a reduction in the contact area between the carrier and the exhaust gas, and even causing the phenomenon of catalytic converter blockage.

[0003] A patent of Chinese Patent Application CN114517726B discloses a motor vehicle exhaust gas catalytic purifier. The key points of its technical solution are as follows: It includes a connecting pipe, a purification device, and an exhaust pipe. The connecting pipe is fixedly installed on the outer side end of the purification device, and the exhaust pipe is fixedly installed inside the purification device and is in communication. When the air flow contacts the catalytic carbon carrier, the spring generates elasticity at this time, so that the whole catalytic carbon carrier elastically vibrates inside the outer ring, improving the purification effect of the catalytic carbon carrier on the exhaust gas. The dredging rod reciprocates left and right inside the flow hole to prevent the particles in the exhaust gas from blocking inside the flow hole and ensure the flow effect of exhaust gas purification.

[0004] However, the above technology often has the following defects: By arranging a dredging rod inside the flow hole of the carrier to dredge the flow hole and push the particulate matters attached inside the hole outwards to prevent the particulate matters in the exhaust gas from blocking the flow hole, but due to the existence of the dredging rod in the above structure, it will occupy the internal space of the carrier, resulting in a reduction in the actual available cross-sectional area of the flow hole. Therefore, it affects the passage of the exhaust gas and reduces the treatment efficiency of the exhaust gas. Moreover, the dredging rod provides an additional attachment object for the particulate matters, and instead, it may increase the probability of flow hole blockage.

[0005] Therefore, the present invention provides a motor vehicle exhaust gas catalytic purifier and a usage method thereof. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A motor vehicle exhaust gas catalytic purifier described in the present invention includes a housing; an air inlet and an air outlet are respectively arranged at both ends of the housing; a collection chamber is arranged at the bottom of the housing;

[0008] It further includes a complementary catalytic component; the complementary catalytic component is arranged inside the housing; the complementary catalytic component includes a movable carrier, a fixed carrier and a mounting ring;

[0009] Both the movable carrier and the fixed carrier are composed of end plates and a group of rings with different diameters; the rings are sleeved with each other and arranged concentrically; a group of connecting rods are respectively fixedly connected between the end plates and the multiple rings; a group of through holes are evenly distributed on the surface of the end plates; the surfaces of the rings are coated with a catalytic coating;

[0010] The distance between the rings is equal to the thickness of the rings; the rings of the movable carrier and the fixed carrier are arranged in a staggered manner;

[0011] The mounting ring is fixedly connected inside the housing; a driving component is fixedly connected between the mounting ring and the end plate of the movable carrier; the driving component is used to control the movement of the movable carrier inside the housing.

[0012] Preferably, the driving component is a spiral driving bar; the spiral driving bar is made of a shape memory alloy material.

[0013] Preferably, at normal temperature, the movable carrier and the fixed carrier are closed to each other and form a complementary joint structure; when the spiral driving bar is heated by the tail gas, it deforms and shortens, controlling the separation of the movable carrier and the fixed carrier.

[0014] Preferably, a guide pin is fixedly connected to the top of the end plate of the movable carrier; a guide groove is formed on the inner surface of the top wall of the housing, and the guide pin is slidably connected inside the guide groove; the guide groove is designed in a wave shape.

[0015] Preferably, a partition plate is fixedly connected to the top of the collection chamber; slag dropping grooves one and two are respectively arranged on the surface of the partition plate at positions on both sides of the fixed carrier; a tray is slidably connected to the bottom of the collection chamber.

[0016] Preferably, a chute is arranged inside the partition plate; a switch piece is slidably connected inside the chute; an elastic member is arranged between the switch piece and the chute; a guide bar is fixedly connected to the surface of the switch piece at a position corresponding to the slag dropping groove one through a bracket; a connecting groove is arranged on the surface of the switch piece at a position corresponding to the slag dropping groove two; a dial is fixedly connected to the bottom of the end plate of the movable carrier.

[0017] Preferably, an anti - lifting layer is fixedly connected inside the collection chamber, and the anti - lifting layer is located between the partition plate and the tray; the anti - lifting layer is made of an elastic porous material.

[0018] Preferably, a pressing groove is formed inside the partition plate at a position corresponding to the slag dropping groove one; a slider is slidably connected inside the pressing groove; an elastic hollow block is fixedly connected between the slider and the pressing groove; a first spring is fixedly connected inside the elastic hollow block;

[0019] A gas sleeve is fixedly connected to the lower side of the isolation plate; a gas rod is slidably and sealingly connected inside the gas sleeve, and the gas rod is fixedly connected to the anti-spray layer; a second spring is fixedly connected between the gas rod and the isolation plate; the gas sleeve and the elastic hollow block are communicated through a conduit.

[0020] A method for using a motor vehicle exhaust gas catalytic purifier, which is applicable to the above-mentioned motor vehicle exhaust gas catalytic purifier, includes the following steps:

[0021] S1: When the vehicle starts, the high-temperature exhaust gas enters the interior of the housing through the air inlet, and the spiral drive strip is heated and deformed to shorten, controlling the movement of the movable carrier and separating it from the fixed carrier;

[0022] S2: The exhaust gas flows through the movable carrier and the fixed carrier in sequence, and the catalytic coating on the surface of the ring is used to catalytically treat the pollutants in the exhaust gas, and the treated exhaust gas is discharged outwards through the air outlet;

[0023] S3: After the vehicle shuts off, the interior of the housing gradually returns to normal temperature, then the spiral drive strip elongates again, controlling the movement of the movable carrier and recombining it with the fixed carrier to clean the particulate matter inside the carrier;

[0024] S4: During the cleaning process, the particulate matter falling from both sides of the fixed carrier downwards falls into the tray through the first slag chute and the second slag chute respectively to collect the particulate impurities;

[0025] S5: When enough particulate impurities are collected in the tray, the tray is disassembled and pulled outwards to clean the particulate impurities in the tray regularly.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. For the motor vehicle exhaust gas catalytic purifier and the using method thereof according to the present invention, the driving component controls the movement of the movable carrier inside the housing. Since the rings of the movable carrier and the fixed carrier are mutually misaligned, when the ring of the movable carrier moves, it can be inserted into the gap between the rings of the fixed carrier, prompting the rings of the movable carrier and the fixed carrier to mutually rub and scrape, so that the particulate matter attached to their surfaces can be scraped off. The scraped particles are pushed outwards to both sides by the end of the ring to the outside of the ring, and fall downwards through the gap between the ring and the end plate into the collection cavity, thereby realizing the mutual cleaning of the movable carrier and the fixed carrier, reducing the adhesion and blockage of the carrier, improving the subsequent exhaust gas treatment effect of the two. In addition, after the movable carrier and the fixed carrier are combined, they form a mutually complementary and fitting structure, which can reduce the contact between the surface of the ring and the air, preventing the phenomenon that microorganisms grow on the surface of the ring under the action of moisture when the vehicle has not been started for a long time, resulting in the carrier being attached and blocked.

[0028] 2. In a motor vehicle exhaust gas catalytic purifier and its usage method according to the present invention, by providing guide pins and guide grooves, when the driving assembly controls the movement of the movable carrier, the guide pins can slide synchronously inside the guide grooves, thereby limiting the movement process of the movable carrier, causing the movable carrier to rotate slightly along the wavy guide grooves while being inserted into the fixed carrier, so that there are frictional forces in both the axial and tangential directions between the movable carrier and the ring of the fixed carrier, further improving the scraping effect on the attachments on the surface of the ring and reducing the residue of particulate matter.

[0029] 3. In a motor vehicle exhaust gas catalytic purifier and its usage method according to the present invention, during the process of the movable carrier being gradually inserted into the fixed carrier, the particulate matter falling from both sides of the fixed carrier can respectively fall downward into the tray through slag discharge groove 1 and slag discharge groove 2, thereby collecting the particulate impurities. A detachable pull-out structure is adopted between the tray and the collection chamber. When the tray is full, it can be pulled out for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Figure 1 is a perspective view of the present invention;

[0032] Figure 2 is a schematic structural view of the movable carrier, fixed carrier, and partition plate in the present invention;

[0033] Figure 3 is a schematic view after the movable carrier and the fixed carrier are combined in the present invention;

[0034] Figure 4 is a schematic structural view of the ring in the present invention;

[0035] Figure 5 is a schematic structural view of the switch piece in the present invention;

[0036] Figure 6 is a schematic structural view of the guide groove in the present invention;

[0037] Figure 7 is a cross-sectional view of the present invention;

[0038] Figure 8 is Figure 7 a partial enlarged view at A in

[0039] Figure 9 is Figure 7 a partial enlarged view at B in

[0040] Figure 10 is a schematic flowchart of the method of the present invention.

[0041] In the figure: housing 1, air inlet 2, air outlet 3, collection chamber 4, movable carrier 5, fixed carrier 6, mounting ring 7, spiral drive strip 8, guide pin 9, guide groove 10, partition plate 11, slag chute 1 12, slag chute 2 13, tray 14, chute 15, switch piece 16, elastic member 17, bracket 18, guide strip 19, connection groove 20, paddle 21, anti-dust layer 22, pressure groove 23, slider 24, elastic hollow block 25, spring 1 26, air sleeve 27, air rod 28, spring 2 29, conduit 30, end plate 101, ring 102, connecting rod 103, through hole 104. Detailed implementation mode

[0042] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0043] As Figures 1 to 9 shown, a motor vehicle exhaust gas catalytic purifier according to the present invention includes a housing 1; an air inlet 2 and an air outlet 3 are respectively arranged at both ends of the housing 1; a collection chamber 4 is arranged at the bottom of the housing 1;

[0044] It further includes a complementary catalytic assembly; the complementary catalytic assembly is arranged inside the housing 1; the complementary catalytic assembly includes a movable carrier 5, a fixed carrier 6 and a mounting ring 7;

[0045] Both the movable carrier 5 and the fixed carrier 6 are composed of an end plate 101 and a group of rings 102 with different diameters; the rings 102 are sleeved with each other and arranged concentrically; a group of connecting rods 103 are respectively fixedly connected between the end plate 101 and the plurality of rings 102; a group of through holes 104 are evenly distributed on the surface of the end plate 101, and the through holes 104 are used for allowing exhaust gas to pass through; a catalytic coating is coated on the surface of the rings 102;

[0046] The material of the rings 102 can be bauxite, cerium oxide, titanium oxide, etc., and the catalytic coating can be precious metals such as platinum, palladium, rhodium, etc.;

[0047] The distance between the rings 102 is equal to the thickness of the rings 102; the rings 102 of the movable carrier 5 and the fixed carrier 6 are arranged in a staggered manner;

[0048] The mounting ring 7 is fixedly connected inside the housing 1; a driving assembly is fixedly connected between the mounting ring 7 and the end plate 101 of the movable carrier 5; the driving assembly is used to control the movement of the movable carrier 5 inside the housing 1.

[0049] In the prior art, a dredging rod is arranged inside the flow-through hole 104 of the carrier to dredge the flow-through hole 104, and the particulate matter attached inside the hole is poked outwards to prevent the particulate matter in the exhaust gas from blocking the flow-through hole 104. However, due to the existence of the dredging rod in the above structure, it will occupy the internal space of the carrier, resulting in a reduction in the actual available cross-sectional area of the flow-through hole 104, thus affecting the passage of the exhaust gas and reducing the treatment efficiency of the exhaust gas. Moreover, the dredging rod provides an additional attachment object for the particulate matter, and instead, it may increase the probability of blocking the flow-through hole 104.

[0050] In the present invention, by providing a complementary catalytic assembly, there are annular gaps between multiple concentrically arranged rings 102. The exhaust gas flows between the rings 102 through these gaps, increasing the contact area between the exhaust gas and the carrier. The catalytic coating on the surface of the rings 102 is used to catalytically treat CO, NOx, and HC in the exhaust gas, reducing air pollution. By arranging the movable carrier 5 and the fixed carrier 6 to act together, the exhaust gas flows through their interiors successively. On the one hand, it can improve the treatment degree of pollutants in the exhaust gas. On the other hand, at an appropriate time, the driving assembly can be used to control the movement of the movable carrier 5 inside the housing 1. Since the rings 102 of the movable carrier 5 and the fixed carrier 6 are mutually misaligned, the rings 102 of the movable carrier 5 can be inserted into the gaps between the rings 102 of the fixed carrier 6 when moving, causing the rings 102 of the movable carrier 5 and the fixed carrier 6 to rub and scrape against each other, and the particulate matter attached to their surfaces can be scraped off. The scraped particles are pushed to both sides by the ends of the rings 102 to the outside of the rings 102 and fall down into the collection chamber 4 through the gap between the rings 102 and the end plate 101, thereby realizing the mutual cleaning of the movable carrier 5 and the fixed carrier 6, reducing the adhesion and blockage phenomena of the carrier, and improving their subsequent treatment effect on the exhaust gas. In addition, after the movable carrier 5 and the fixed carrier 6 are combined, they form a mutually complementary structure, which can reduce the contact between the surface of the rings 102 and the air, preventing the phenomenon that microorganisms grow on the surface of the rings 102 under the action of moisture and cause the carrier to be adhered and blocked when the vehicle has not been started for a long time.

[0051] The driving assembly is a spiral driving strip 8; the spiral driving strip 8 is made of a shape memory alloy material, and preferably nickel-titanium alloy is selected. Under normal temperature conditions, the spiral driving strip 8 naturally extends, and the movable carrier 5 and the fixed carrier 6 are in a combined complementary state. When the vehicle is started, the high-temperature exhaust gas enters the housing 1 through the air inlet 2, heating the spiral driving strip 8. Then, the spiral driving strip 8 is deformed and shortened by heat, controlling the movement of the movable carrier 5 and separating it from the fixed carrier 6. At this time, the movable carrier 5 and the fixed carrier 6 respectively catalytically treat the exhaust gas in sequence. When the vehicle is turned off, the interior of the housing 1 gradually returns to normal temperature, and the spiral driving strip 8 elongates again, controlling the movement of the movable carrier 5 and recombining it with the fixed carrier 6 to clean the particulate matter inside the carrier, thereby realizing the automatic control of the device under temperature change conditions.

[0052] As a preferred embodiment of the present invention, a guide pin 9 is fixedly connected to the top of the end plate 101 of the movable carrier 5; a guide groove 10 is provided on the inner wall surface of the top of the shell 1, and the guide pin 9 is slidably connected inside the guide groove 10; the guide groove 10 is designed to be wavy. By providing the guide pin 9 and the guide groove 10, when the driving component controls the movement of the movable carrier 5, the guide pin 9 can slide synchronously inside the guide groove 10, thereby limiting the movement process of the movable carrier 5, prompting the movable carrier 5 to rotate slightly along the wavy guide groove 10 while inserting the fixed carrier 6, so that there is friction in both axial and tangential directions between the movable carrier 5 and the ring 102 of the fixed carrier 6, further improving the scraping effect of the attachments on the surface of the ring 102, and reducing the residual particulate matter.

[0053] As a preferred embodiment of the present invention, the top of the collection chamber 4 is fixedly connected with an isolation plate 11; the surface of the isolation plate 11 is provided with a slag drop groove 12 and a slag drop groove 2 13 at both sides of the fixed carrier 6; and the bottom of the collection chamber 4 is slidably connected with a tray 14. In the process of the movable carrier 5 gradually inserting into the fixed carrier 6, the particles falling downward from both sides of the fixed carrier 6 can respectively fall downward into the tray 14 through the slag drop groove 12 and the slag drop groove 2 13, thereby collecting the particle impurities. A detachable pull-out structure is adopted between the tray 14 and the collection chamber 4, and when the tray 14 is full, it can be pulled out for cleaning.

[0054] A slide groove 15 is arranged inside the isolation plate 11; a switch piece 16 is slidably connected inside the slide groove 15; an elastic member 17 is arranged between the switch piece 16 and the slide groove 15; a guide bar 19 is fixedly connected to the surface of the switch piece 16 at a position corresponding to the slag dropping groove 12 through a bracket 18; a connecting groove 20 is arranged on the surface of the switch piece 16 at a position corresponding to the slag dropping groove 2 13; a paddle 21 is fixedly connected to the bottom of the end plate 101 of the movable carrier 5.

[0055] When the movable carrier 5 is separated from the fixed carrier 6, the slag dropping chute one 12 and the slag dropping chute two 13 are in a blocked state under the action of the switch piece 16, preventing the particulate matter in the tray 14 from returning to the inside of the housing 1 due to the bumps during vehicle driving, and also avoiding exhaust gas diversion. When the movable carrier 5 moves and gradually inserts into the fixed carrier 6, the flap 21 at its bottom can drive the switch piece 16 to move inside the chute 15 through the guide bar 19 and the bracket 18. Furthermore, the end of the switch piece 16 opens the slag dropping chute one 12, aligns the connecting groove 20 with the slag dropping chute two 13 and opens it, so that the slag dropping chute one 12 and the slag dropping chute two 13 are both in an open state. Then, the particulate matter falling from both sides of the fixed carrier 6 can smoothly fall into the inside of the tray 14. When the movable carrier 5 is separated from the fixed carrier 6 again, the elastic member 17 drives the switch piece 16 to reset and block the slag dropping chute one 12 and the slag dropping chute two 13 again.

[0056] As a preferred embodiment of the present invention, an anti - lifting layer 22 is fixedly connected inside the collection chamber 4, and the anti - lifting layer 22 is located between the isolation plate 11 and the tray 14; the anti - lifting layer 22 is made of an elastic porous material; the material of the anti - lifting layer 22 can be heat - resistant porous rubber, or a multi - layer stacked metal mesh, etc. By setting the anti - lifting layer 22, the collection chamber 4 can be made in a semi - closed and semi - conductive state, blocking the particulate matter collected inside the tray 14, further preventing the fine dust in the tray 14 from floating and diffusing upward when the slag dropping chute one 12 and the slag dropping chute two 13 are opened, improving the collection efficiency of the tray 14. The particulate matter falling downward will first fall on the upper surface of the anti - lifting layer 22, and then, under the action of vehicle bumps and vibrations, the particulate matter will fall into the inside of the tray 14 along the pores of the anti - lifting layer 22.

[0057] As a preferred embodiment of the present invention, a pressure groove 23 is opened at a position corresponding to the slag dropping chute one 12 inside the isolation plate 11; a slider 24 is slidably connected inside the pressure groove 23; an elastic hollow block 25 is fixedly connected between the slider 24 and the pressure groove 23; a spring one 26 is fixedly connected inside the elastic hollow block 25;

[0058] A gas sleeve 27 is fixedly connected to the lower side of the isolation plate 11; a gas rod 28 is slidably and sealingly connected inside the gas sleeve 27, and the gas rod 28 is fixedly connected to the anti - lifting layer 22; a spring two 29 is fixedly connected between the gas rod 28 and the isolation plate 11; the gas sleeve 27 is communicated with the elastic hollow block 25 through a conduit 30.

[0059] When the elastic member 17 drives the switch piece 16 to slide back to its original position, the switch piece 16 blocks the slag dropping groove one 12 and the slag dropping groove two 13 again. At the same time, the end of the switch piece 16 presses the slider 24, and the slider 24 is used to squeeze the air inside the elastic hollow block 25 through the conduit 30 into the air sleeve 27, thereby driving the air rod 28 to move downward and pressing against the anti-dust layer 22. On the one hand, it can drive the anti-dust layer 22 to vibrate, accelerating the downward dropping of the particulate matter on the upper side of the anti-dust layer 22 along the pores. On the other hand, the air rod 28 pressing downward against the anti-dust layer 22 can cause it to be tensioned and deformed, thereby increasing the hole size of the anti-dust layer 22, further facilitating the downward dropping of the particulate matter on its surface. When the switch piece 16 re-opens the slag dropping groove one 12 and the slag dropping groove two 13 subsequently, the slider 24, the elastic hollow block 25, and the air rod 28 all return to their original positions, then the anti-dust layer 22 and its pores contract and recover, reducing the hole size, further isolating the fine dust, and improving its anti-dust-rising effect.

[0060] As Figure 10 shown, a method for using a motor vehicle exhaust gas catalytic purifier according to the present invention is applicable to the above-mentioned motor vehicle exhaust gas catalytic purifier, and includes the following steps:

[0061] S1: When the vehicle starts, the high-temperature exhaust gas enters the interior of the housing 1 through the air inlet 2, and the spiral drive strip 8 is heated and deformed to shorten, controlling the movement of the movable carrier 5 and separating it from the fixed carrier 6;

[0062] S2: The exhaust gas flows through the interior of the movable carrier 5 and the fixed carrier 6 in sequence, and the catalytic coating on the surface of the circular ring 102 is used to catalytically treat the pollutants in the exhaust gas, and the treated exhaust gas is discharged outward through the air outlet 3;

[0063] S3: After the vehicle shuts off, the interior of the housing 1 gradually returns to normal temperature, then the spiral drive strip 8 elongates again, controlling the movement of the movable carrier 5 and recombining it with the fixed carrier 6 to clean the particulate matter inside the carrier;

[0064] S4: During the cleaning process, the particulate matter falling downward from both sides of the fixed carrier 6 respectively falls into the interior of the tray 14 through the slag dropping groove one 12 and the slag dropping groove two 13 to collect the particulate impurities;

[0065] S5: When the tray 14 collects a sufficient amount of particulate impurities, the tray 14 is disassembled and pulled outwards to regularly clean the particulate impurities in the tray 14.

[0066] The above front, back, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. According to the standard of the observer's perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0067] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor vehicle exhaust catalytic purifier, comprising a housing (1); an air inlet (2) and an air outlet (3) are respectively arranged at two ends of the housing (1); and a collecting chamber (4) is arranged at the bottom of the housing (1); Features: It also includes a complementary catalytic component; the complementary catalytic component is arranged inside the housing (1); the complementary catalytic component includes a movable carrier (5), a fixed carrier (6) and a mounting ring (7); The movable carrier (5) and the fixed carrier (6) are both composed of an end plate (101) and a group of circular rings (102) with different diameters; the circular rings (102) are mutually sleeved and concentrically arranged; a group of connecting rods (103) are respectively fixedly connected between the end plate (101) and the plurality of circular rings (102); a group of through holes (104) are evenly distributed on the surface of the end plate (101); and the surfaces of the circular rings (102) are coated with a catalytic coating; The distance between the circular rings (102) is equal to the thickness of the circular rings (102); the circular rings (102) of the movable carrier (5) and the circular rings (102) of the fixed carrier (6) are arranged in a staggered manner; The mounting ring (7) is fixedly connected to the inside of the housing (1); a driving component is fixedly connected between the mounting ring (7) and the end plate (101) of the movable carrier (5); the driving component is used to control the movement of the movable carrier (5) inside the housing (1).

2. A motor vehicle exhaust catalytic converter according to claim 1, characterized in that: The driving component is a spiral driving bar (8); the spiral driving bar (8) is made of memory alloy material.

3. A motor vehicle exhaust catalytic converter according to claim 2, characterized in that: At room temperature, the movable carrier (5) and the fixed carrier (6) are closed together to form a mutually complementary structure; when the spiral drive strip (8) is heated by exhaust gas, it is deformed and shortened, thereby controlling the movable carrier (5) and the fixed carrier (6) to separate from each other.

4. A motor vehicle exhaust catalytic converter according to claim 3, characterized in that: A guide pin (9) is fixedly connected to the top of the end plate (101) of the movable carrier (5); a guide groove (10) is provided on the inner wall surface of the top of the shell (1), and the guide pin (9) is slidably connected to the inside of the guide groove (10); the guide groove (10) is designed to be wavy.

5. A motor vehicle exhaust catalytic converter according to claim 4, characterized in that: The top of the collection chamber (4) is fixedly connected to an isolation plate (11); a slag drop groove 1 (12) and a slag drop groove 2 (13) are respectively provided on the surface of the isolation plate (11) at both sides of the fixed carrier (6); and the bottom of the collection chamber (4) is slidably connected to a tray (14).

6. A motor vehicle exhaust catalytic converter according to claim 5, characterized in that: A slide groove (15) is provided inside the isolation plate (11); a switch piece (16) is slidably connected inside the slide groove (15); an elastic member (17) is provided between the switch piece (16) and the slide groove (15); a guide bar (19) is fixedly connected to the surface of the switch piece (16) at a position corresponding to the first slag dropping groove (12) through a bracket (18); a connecting groove (20) is provided on the surface of the switch piece (16) at a position corresponding to the second slag dropping groove (13); and a paddle (21) is fixedly connected to the bottom of the end plate (101) of the movable carrier (5).

7. A motor vehicle exhaust catalytic converter according to claim 6, characterized in that: An anti-lifting layer (22) is fixedly connected to the interior of the collection chamber (4), and the anti-lifting layer (22) is located between the isolation plate (11) and the tray (14); the anti-lifting layer (22) is made of an elastic porous material.

8. The motor vehicle exhaust catalytic converter according to claim 7, characterized in that: A pressing groove (23) is provided inside the isolation plate (11) at a position corresponding to the slag dropping groove (12); a slider (24) is slidably connected inside the pressing groove (23); an elastic hollow block (25) is fixedly connected between the slider (24) and the pressing groove (23); a spring (26) is fixedly connected inside the elastic hollow block (25); The lower side of the isolation plate (11) is fixedly connected with an air sleeve (27); the interior of the air sleeve (27) is slidably and sealingly connected with an air rod (28), and the air rod (28) is fixedly connected to the anti-lifting layer (22); a spring 2 (29) is fixedly connected between the air rod (28) and the isolation plate (11); the air sleeve (27) and the elastic hollow block (25) are connected via a conduit (30).

9. A method for using a motor vehicle exhaust catalytic purifier, the method being applicable to the motor vehicle exhaust catalytic purifier according to claim 8, characterized in that: The following steps are involved: S1: When the vehicle is started, the exhaust gas enters the housing (1) through the air inlet (2), the spiral drive strip (8) is deformed and shortened due to heat, and the movable carrier (5) is controlled to move and separate from the fixed carrier (6); S2: the exhaust gas flows through the movable carrier (5) and the fixed carrier (6) in sequence, and the pollutants in the exhaust gas are catalytically treated by the catalytic coating on the surface of the ring (102), and the treated exhaust gas is discharged to the outside through the outlet (3); S3: After the vehicle is turned off, the interior of the housing (1) gradually returns to normal temperature, and the spiral drive bar (8) re-extends to control the movable carrier (5) to move and re-combine with the fixed carrier (6) to clean the particles inside the carrier.

10. The method for using a motor vehicle exhaust catalytic converter according to claim 9, characterized in that: This method also The following steps are involved: S4: during the cleaning process, the particles falling downward from both sides of the fixed carrier (6) respectively fall downward through the first slag drop groove (12) and the second slag drop groove (13) into the inside of the tray (14) to collect the particle impurities; S5: When the tray (14) is full of granular impurities, the tray (14) is disassembled and pulled outward to regularly clean the granular impurities in the tray (14).

Images