CN206267920U - Automobile exhaust purifier and its purifier - Google Patents

Abstract

The utility model is related to automobile purification technical field, in particular to automobile exhaust purifier and its purifier.Air inlet pipe is located at the both sides of cylinder with blast pipe, vehicle exhaust enters inner barrel from air inlet pipe, discharged from blast pipe after filtration, purification, it is then discharged to the external world, inner barrel is provided with solid filter assemblies and liquid filter assemblies, solid filter assemblies are mainly used in purifying the finely ground particle substance in vehicle exhaust, liquid filter assemblies are mainly used in purifying the pernicious gas in vehicle exhaust, air inlet pipe extend into inner barrel and is connected with solid filter assemblies, solid filter assemblies are connected by wireway with liquid filter assemblies, make the purification of vehicle exhaust more thorough, after vehicle exhaust is processed through liquid filter assemblies, realize the function of preferably purification vehicle exhaust.

Description

Automobile Exhaust Gas Purifier and Its Purification Device

technical field

The utility model relates to the technical field of automobile purification, in particular to an automobile exhaust purifier and a purification device thereof.

Background technique

Nowadays, the living environment is getting worse and worse. Automobile exhaust is one of the main sources of air pollution. Most of the automobile exhaust is sulfur-containing compounds and hydrocarbon-containing compounds. These compounds have a serious impact on the atmosphere. The per capita number of automobiles in my country is increasing rapidly. As the city climbs, automobiles emit a large amount of unfiltered exhaust every day, and the pollution of automobile exhaust is becoming more and more serious. A large amount of automobile exhaust makes the air quality of cities continue to decline, and air pollution is worrying. In order to control the exhaust pollution of automobiles and reduce the emission of carbon monoxide, black smoke and other toxic gases, automobile manufacturers have been looking for effective ways to reduce emission pollution for decades. How to effectively remove harmful gases in automobile exhaust is one of the urgent problems to be solved in modern society, such as exhaust circulation, fuel tank oil vapor recovery, engine electronic control system and catalytic converter, etc. These purification methods either have poor purification effects, or purify The cost is high, and there is a lack of an exhaust gas purification device with good purification effect and low cost. Most of the existing automobile exhaust gas treatment technologies adopt primary exhaust gas treatment to a large extent, which is not good for the filtration of automobile exhaust gas, and a large part of harmful gases will be discharged.

Therefore, it is an important technical problem to be solved by those skilled in the art to provide an exhaust processor and its purification device that can better purify automobile exhaust.

Utility model content

The purpose of the utility model is to provide an automobile exhaust purifier and a purifying device thereof, so as to alleviate the technical problem of poor purification effect of automobile exhaust in the prior art.

The utility model provides an automobile exhaust purifier, comprising: a cylinder body, an air intake pipe, an exhaust pipe, a solid filter assembly, a liquid filter assembly and a noise reduction assembly; the air intake pipe and the exhaust pipe are located in the cylinder body On both sides of the cylinder, the solid filter assembly and the liquid filter assembly are located inside the cylinder, the sound-absorbing assembly is located on the exhaust pipe, and the solid filter assembly is connected to the liquid filter assembly through an air duct; The solid filter assembly is spliced by an S-shaped tube and a filter tube. A first check valve is provided at the inlet of the S-shaped tube. A solid filter is provided in the filter tube. The air pipe is connected, and a second one-way valve is arranged in the branch pipe.

Further, the intake pipe is connected to the S-shaped pipe through a first tapered pipe.

Further, the air inlet of the first one-way valve faces the air inlet pipe, and the air outlet of the first one-way valve faces the S-shaped pipe.

Further, the air inlet of the second one-way valve faces the air guide pipe, and the air outlet of the second one-way valve faces the air inlet pipe.

Further, one side of the liquid filter assembly is provided with an air inlet, and the other side is provided with an air outlet, the air guide pipe is arranged at the air inlet, and the exhaust pipe is arranged at the air outlet.

Further, the liquid filter assembly includes a clean room, a liquid inlet, a liquid discharge, a filtrate and a second conical pipe;

The inside of the clean room is provided with the filtrate, the liquid inlet is set on the side wall of the clean room, the liquid discharge port is set at the bottom of the clean room, and the air guide tube extends into the The clean room is connected with the second conical tube, and the bottom of the second conical tube is located in the filtrate.

Further, a filter layer is provided inside the clean room, the filter layer is arranged at the air outlet, and the filter layer is located above the filtrate.

Further, the automobile exhaust purifier also includes a sound-absorbing component;

The liquid filter assembly is connected to the noise reduction assembly through an exhaust pipe;

The sound-absorbing assembly includes a pipe body, an outer cover arranged outside the pipe for sound absorption, and a sound-absorbing net arranged in the pipe body, and the sound-absorbing net is provided with sound-absorbing cotton.

Further, the two connected noise-absorbing nets are V-shaped

A purification device provided by the utility model includes the automobile exhaust purifier.

Beneficial effect:

The utility model provides an automobile exhaust purifier, comprising: cylinder body, intake pipe, exhaust pipe, solid filter assembly and liquid filter assembly; It enters the inside of the cylinder, and after being filtered and purified, it is discharged from the exhaust pipe, and then discharged to the outside world. There are solid filter components and liquid filter components inside the cylinder. The solid filter components are mainly used to purify the small particles in the automobile exhaust. The component is mainly used to purify the harmful gas in the automobile exhaust. The intake pipe extends into the cylinder and connects with the solid filter component. The solid filter component is connected with the liquid filter component through the air guide tube. The solid filter component is spliced by an S-shaped tube and a filter tube. As a result, the automobile exhaust first enters the S-shaped pipe, and then enters the filter pipe. The first check valve is arranged at the entrance of the S-shaped pipe. The automobile exhaust can enter the S-shaped pipe through the one-way valve, but cannot return from the S-shaped pipe to the In the intake pipe, the filter tube is equipped with a solid filter. When the exhaust gas passes through the filter tube, the particulate pollutants in the exhaust gas will be adsorbed and purified, or catalyzed into harmless substances, and then the exhaust gas will be filtered from the solid through the air guide tube. The assembly flows to the liquid filter assembly, where the intake pipe is connected to the air guide pipe through a branch pipe, and a second check valve is set in the branch pipe. The automobile exhaust can flow into the intake pipe from the air guide pipe, but cannot directly flow into the air guide pipe from the intake pipe. It can reduce the load of the liquid filter assembly and make the purification of the automobile exhaust more thorough. The automobile exhaust is processed and discharged by the liquid filter assembly, which realizes a better function of purifying the automobile exhaust. Purifying effect.

A purification device provided by the utility model includes an automobile exhaust purifier. Compared with the prior art, the purification device has the above-mentioned advantages, which will not be repeated here.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the structural representation of the automobile exhaust purifier that the utility model embodiment provides;

Fig. 2 is a partial enlarged view of A in Fig. 1;

Fig. 3 is a partial enlarged view of B in Fig. 1;

Fig. 4 is a partial enlarged view of C in Fig. 1;

Fig. 5 is a schematic structural diagram of the sound-absorbing net in Fig. 4 .

Icons: 100 - cylinder; 101 - intake pipe; 1011 - first tapered pipe; 102 - exhaust pipe; 103 - air guide pipe; 104 - branch pipe; 1041 - second one-way valve; 200 - solid filter assembly; 201 - S-shaped tube; 2011 - first one-way valve; 202 - filter tube; 2021 - solid filter; 300 - liquid filter assembly; 301 - clean room; 302 - liquid inlet; 303 - liquid outlet; 304 - filtrate ; 305-second tapered pipe; 306-air inlet; 307-air outlet; 308-filter layer;

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The utility model will be described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of the automobile exhaust purifier that the utility model embodiment provides; Fig. 2 is the partial enlarged view of A among Fig. 1; Fig. 3 is the partial enlarged view of B among Fig. 1; Fig. 4 is the part of C among Fig. 1 Partial enlarged view; Fig. 5 is a schematic structural diagram of the sound-absorbing net in Fig. 4 .

As shown in Figures 1 to 5, an automobile exhaust purifier provided by the embodiment of the present invention includes: a cylinder body 100, an air intake pipe 101, an exhaust pipe 102, a solid filter assembly 200 and a liquid filter assembly 300; the air intake pipe 101 and the exhaust pipe 102 are located on both sides of the cylinder 100, the solid filter assembly 200 and the liquid filter assembly 300 are located inside the cylinder 100, the solid filter assembly 200 is connected to the liquid filter assembly 300 through the air duct 103; the solid filter assembly 200 is composed of The S-shaped pipe 201 is spliced with the filter pipe 202. The entrance of the S-shaped pipe 201 is provided with a first one-way valve 2011. The filter pipe 202 is provided with a solid filter agent 2021. The intake pipe 101 is connected to the air guide pipe 103 through the branch pipe 104. A second one-way valve 1041 is disposed in the branch pipe 104 .

The utility model provides an automobile exhaust gas purifier, comprising: cylinder body 100, intake pipe 101, exhaust pipe 102, solid filter assembly 200, liquid filter assembly 300 and muffler assembly 400; intake pipe 101 and exhaust pipe 102 are located On both sides of the barrel 100, automobile exhaust enters the interior of the barrel 100 from the intake pipe 101, and is discharged from the exhaust pipe 102 after being filtered and purified. The solid filter assembly 200 and the liquid filter assembly 300 are arranged inside the cylinder 100. The solid filter assembly 200 is mainly used to purify the small particles in the exhaust gas of the automobile, and the liquid filter assembly 300 is mainly used to purify the automobile exhaust. Harmful gas in the exhaust gas, the air inlet pipe 101 extends into the cylinder body 100 and connects with the solid filter assembly 200, and the solid filter assembly 200 is connected with the liquid filter assembly 300 through the air guide pipe 103, wherein the solid filter assembly 200 is connected with the filter by the S-shaped pipe 201 The pipes 202 are spliced together. The automobile exhaust first enters the S-shaped pipe 201, and then enters the filter pipe 202. The entrance of the S-shaped pipe 201 is provided with a first one-way valve 2011, and the automobile exhaust can enter the S-shaped pipe 201 through the one-way valve. However, it cannot return from the S-shaped pipe 201 to the intake pipe 101. The filter pipe 202 is provided with a solid filter agent 2021. When the automobile exhaust passes through the filter pipe 202, the particulate pollutants in the automobile exhaust will be adsorbed and purified, or catalyzed. into harmless substances, and then the automobile exhaust flows from the solid filter assembly 200 to the liquid filter assembly 300 through the air guide pipe 103, wherein the intake pipe 101 is connected with the air guide pipe 103 through the branch pipe 104, and the second check valve 1041 is arranged in the branch pipe 104, and the automobile exhaust gas It can flow into the air intake pipe 101 from the air guide pipe 103, but cannot directly flow into the air guide pipe 103 from the air intake pipe 101. This setting can reduce the load of the liquid filter assembly 300 and make the purification of the automobile exhaust more thorough. The automobile exhaust passes through the liquid filter assembly After 300 treatment, it is discharged from the exhaust pipe 102 to the silencer assembly 400, and then discharged through the silencer assembly 400. At the same time, the functions of purifying the automobile exhaust and silencer are realized. Purifying effect.

It should be pointed out that after the automobile exhaust is discharged from the engine, it enters the cylinder 100 through the intake pipe 101, then passes through the solid filter assembly 200 arranged in the cylinder 100, enters the liquid filter assembly 300 through the air guide pipe 103, and passes through the exhaust pipe. 102 is discharged from the cylinder 100, then enters the silencer assembly 400, and is discharged after the silencer treatment.

It should also be pointed out that the solid filter assembly 200 is spliced by an S-shaped tube 201 and a filter tube 202, the inlet of the S-shaped tube 201 is connected with the intake pipe 101, and the outlet of the S-shaped tube 201 is connected with the filter tube 202 , the automobile exhaust flows through the intake pipe 101-S-shaped pipe 201-filter pipe 202.

It should also be pointed out that the purpose of setting the S-shaped pipe 201 is that when the automobile exhaust gas enters the S-shaped pipe 201, it turns frequently, so that the gas can be vibrated, and the particles in the automobile exhaust gas collide with each other and adsorb together, which is convenient for subsequent Filter jobs.

It should also be pointed out that a first one-way valve 2011 is provided at the entrance of the S-shaped pipe 201, the generator discharges high-temperature and high-pressure exhaust gas, and the automobile exhaust gas is introduced into the S-shaped pipe 201 through a pipeline, because the S-shaped pipe 201 is connected with a filter tube 202, the exhaust gas is purified in the first step in the filter tube 202, and the exhaust gas will flow slowly here. In order to prevent the exhaust gas from flowing back into the intake pipe 101, a first one-way valve 2011 is installed at the entrance of the S-shaped pipe 201, and at the same time it can The pressure of the exhaust gas in the S-shaped pipe 201 is increased to improve the purification efficiency of the filter pipe 202 .

It should also be pointed out that the solid filter assembly 200 is connected to the liquid filter assembly 300 through the air guide tube 103, and the air guide tube 103 is connected to the intake pipe 101 through the branch pipe 104. Because the liquid filter assembly 300 is purified slowly, in order to ensure the purification quality, the branch pipe is used 104 connects the air guide pipe 103 with the intake pipe 101. When the internal pressure of the liquid filter assembly 300 rises, the external exhaust gas cannot enter. At this time, it flows back to the intake pipe 101 through the branch pipe 104. In order to prevent the exhaust gas in the intake pipe 101 from passing through The branch pipe 104 directly enters the air guide pipe 103, and a second check valve 1041 is arranged in the branch pipe 104. Under the action of the second check valve 1041, the exhaust gas in the air guide pipe 103 can enter the intake pipe 101 through the branch pipe 104, and the intake pipe Exhaust gas in 101 cannot directly enter the air duct 103 , and needs to be purified by the solid filter assembly 200 before entering the air duct 103 .

In an optional solution of this embodiment, the intake pipe 101 is connected to the S-shaped pipe 201 through a first tapered pipe 1011 .

The intake pipe 101 is connected with the S-shaped pipe 201, which can lead the automobile exhaust gas into the S-shaped pipe 201. In order to improve the introduction efficiency and other pressures, the intake pipe 101 and the S-shaped pipe 201 are connected together through the first tapered pipe 1011. The first The thin end of the tapered pipe 1011 is connected with the S-shaped pipe 201 , and the thick end is connected with the intake pipe 101 .

It should be pointed out that, according to the principle of gas pressure, after the automobile exhaust gas passes through the first conical pipe 1011, the exhaust gas will be pressurized, which is beneficial to the follow-up work.

In an alternative solution of this embodiment, the air inlet 306 of the first one-way valve 2011 faces the air inlet pipe 101 , and the air outlet 307 of the first one-way valve 2011 faces the S-shaped pipe 201 .

The air inlet 306 of the first one-way valve 2011 faces the air intake pipe 101, and the air outlet 307 of the first one-way valve 2011 faces the S-shaped pipe 201, so that the exhaust gas can enter the S-shaped pipe 201, but cannot flow out of the S-shaped pipe 201 .

It should be pointed out that the first one-way valve 2011 is an air one-way valve.

In an alternative solution of this embodiment, the air inlet 306 of the second one-way valve 1041 faces the air duct 103 , and the air outlet 307 of the second one-way valve 1041 faces the air inlet pipe 101 .

The air inlet 306 of the second one-way valve 1041 faces the air guide pipe 103, and the air outlet 307 of the second one-way valve 1041 faces the air inlet pipe 101, so that the exhaust gas can flow into the air inlet pipe 101 from the air guide pipe 103, but cannot flow from the air inlet pipe. The trachea 101 flows directly into the airway 103 .

It should be noted that the second one-way valve 1041 is an air one-way valve.

In the optional solution of this embodiment, one side of the liquid filter assembly 300 is provided with an air inlet 306, and the other side is provided with an air outlet 307, the air guide pipe 103 is arranged at the air inlet 306, and the exhaust pipe 102 is arranged at the air outlet 307 places.

One side of the clean room 301 is provided with an air inlet 306 , and the other side is provided with an air outlet 307 , and the air guide pipe 103 enters into the clean room 301 through the air inlet 306 and is connected with the second tapered pipe 305 .

It should be pointed out that the exhaust gas filtered and purified by the filtrate 304 is discharged from the gas outlet 307 .

In the optional solution of this embodiment, the liquid filter assembly 300 includes a clean room 301, a liquid inlet 302, a liquid discharge port 303, a filtrate 304, and a second conical tube 305; the inside of the clean room 301 is provided with a filtrate 304, and the liquid inlet 302 is arranged on the side wall of the clean room 301, the liquid outlet 303 is set at the bottom of the clean room 301, the air guide pipe 103 stretches into the clean room 301 and is connected with the second tapered pipe 305, and the bottom of the second tapered pipe 305 is located at In the filtrate 304.

The liquid filter assembly 300 comprises a clean room 301, a liquid inlet 302, a liquid outlet 303, a filtrate 304 and a second conical pipe 305, the clean room 301 is provided with a filtrate 304, and the air guide tube 103 extends into the clean room 301 to connect with the second The conical pipe 305 is connected, and the bottom of the second conical pipe 305 is located in the filtrate 304 . The tail gas enters the purification chamber 301 through the pipeline, is injected into the filtrate 304 , and reacts with the filtrate 304 .

It should be pointed out that the air guide pipe 103 extends into the purification chamber 301 and is connected with the second conical pipe 305, through which the exhaust gas is accelerated, which can improve the purification efficiency.

It should also be pointed out that when the filtrate 304 loses its effect, it can be discharged from the drain port 303 , and new filtrate 304 can be added from the liquid inlet port 302 .

In an optional solution of this embodiment, a filter layer 308 is further provided inside the clean room 301 , the filter layer 308 is arranged at the gas outlet 307 , and the filter layer 308 is located above the filtrate 304 .

A filter layer 308 is also provided inside the clean room 301, and the filter layer 308 is arranged at the air outlet 307, and the filter layer 308 is located above the filtrate 304, and the filter layer 308 can prevent the tail gas from sticking to the filtrate 304.

It should be pointed out that the filter layer 308 is arranged at the gas outlet 307 and is mainly used to absorb the filtrate 304 in the exhaust gas.

In an optional solution of this embodiment, the liquid filter assembly 300 is connected to the noise reduction assembly 400 through the exhaust pipe 102; The sound-absorbing net 403 of the sound-absorbing net 403 is provided with the sound-absorbing cotton.

The liquid filter assembly 300 is connected to the muffler assembly 400 through the exhaust pipe 102. The exhaust gas comes out from the liquid filter assembly 300 and enters the pipe body 401 along the exhaust pipe 102. An outer cover 402 is arranged on the outer wall of the pipe body 401. The outer cover 402 is used for Absorb vibration and noise to achieve noise reduction effect. At the same time, the pipe body 401 is provided with a noise reduction net 403, and the noise reduction net 403 is provided with a noise reduction cotton. Through such an arrangement, the noise reduction function can be realized.

It should be pointed out that multiple sound-absorbing nets can be set in the pipe body 401 .

In an optional solution of this embodiment, the two connected noise-absorbing nets 403 are V-shaped.

The sound-absorbing nets 403 are arranged obliquely in the pipe body 401. After being installed, two adjacent sound-absorbing nets 403 are V-shaped, which can increase the contact area of the exhaust gas and improve the sound-absorbing effect.

A purification device provided by an embodiment of the utility model includes an automobile exhaust purifier.

The utility model provides a purification device, which is provided with an automobile exhaust purifier. Automobile exhaust enters the interior of cylinder 100 from intake pipe 101, and is discharged from exhaust pipe 102 after being filtered and purified. Exhaust pipe 102 is connected with muffler assembly 400. outside world. Specifically, the solid filter assembly 200 is mainly used to purify small particulate matter in automobile exhaust, and the liquid filter assembly 300 is mainly used to purify harmful gases in automobile exhaust. The solid filter assembly 200 is connected to the liquid filter assembly 300 through the air guide tube 103, wherein The solid filter assembly 200 is composed of an S-shaped pipe 201 and a filter pipe 202. The exhaust gas is firstly purified by the solid filter assembly 200. After the vehicle exhaust is processed by the liquid filter assembly 300, it is discharged from the exhaust pipe 102 to the muffler assembly 400. After the assembly 400 is discharged, the functions of purifying automobile exhaust gas and noise reduction are realized at the same time, and the purification effect is greatly enhanced due to the installation of the solid filter assembly 200 and the liquid filter assembly 300 .

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (10)

1. An automobile exhaust purifier, characterized in that, comprising: cylinder body, intake pipe, exhaust pipe, solid filter assembly and liquid filter assembly; The air intake pipe and the exhaust pipe are respectively located on both sides of the cylinder body, the solid filter assembly and the liquid filter assembly are located inside the cylinder body, and the solid filter assembly communicates with the The liquid filter assembly is connected; The solid filter assembly is spliced by an S-shaped tube and a filter tube. A first one-way valve is provided at the inlet of the S-shaped tube. A solid filter is provided in the filter tube. The air inlet tube is connected to the The air guide tube is connected, and a second one-way valve is arranged in the branch tube. 2. The automobile exhaust purifier according to claim 1, characterized in that, the intake pipe is connected to the S-shaped pipe through a first tapered pipe. 3. The automobile exhaust purifier according to claim 1, characterized in that, the air inlet of the first one-way valve faces the air intake pipe, and the air outlet of the first one-way valve faces the S-shaped pipe. 4. The automobile exhaust purifier according to claim 3, wherein the air inlet of the second one-way valve faces the air guide pipe, and the air outlet of the second one-way valve faces the air inlet pipe . 5. The automobile exhaust purifier according to claim 4, characterized in that, one side of the liquid filter assembly is provided with an air inlet, and the other side is provided with an air outlet, and the air guide tube is arranged at the air inlet , the exhaust pipe is arranged at the air outlet. 6. The automobile exhaust purifier according to claim 5, characterized in that, the liquid filter assembly also includes a clean room, a liquid inlet, a liquid discharge port and a second tapered pipe; The inside of the clean room is provided with a filtrate, the liquid inlet is set on the side wall of the clean room, the liquid outlet is set at the bottom of the clean room, and the air guide pipe extends into the clean room and The second conical tube is connected, and the second conical tube extends into the filtrate. 7. The automobile exhaust purifier according to claim 6, wherein a filter layer is also arranged inside the clean room, the filter layer is arranged at the air outlet, and the filter layer is located at the filtrate above. 8. The automobile exhaust purifier according to claim 7, further comprising a sound-absorbing assembly; The liquid filter assembly is connected to the noise reduction assembly through an exhaust pipe; The sound-absorbing assembly includes a pipe body, an outer cover arranged outside the pipe for sound absorption, and a sound-absorbing net arranged inside the pipe, and the sound-absorbing net is provided with sound-absorbing cotton. 9. The automobile exhaust purifier according to claim 8, characterized in that, the two connected noise-absorbing nets are V-shaped. 10. A purification device, characterized in that it comprises the automobile exhaust purifier according to any one of claims 1-9.