Exhaust system and vehicle

Abstract

The invention relates to an exhaust system and a vehicle, and belongs to the technical field of vehicle exhaust emission. The exhaust system comprises an air inlet pipe, a silencer, a heating unit, an air extracting pump and a control unit. One end of the air inlet pipe is used for being communicated with an air outlet of an engine. One end of the silencer is communicated with the other end of the air inlet pipe; the heating unit is connected with the silencer; the air extracting pump is communicated with the silencer; the control unit is electrically connected with the engine, the heating unit and the air extracting pump and used for controlling the heating unit to operate so as to melt ice in the silencer and controlling the air extracting pump to operate so as to enable water vapor to be discharged out of the silencer under the condition that the engine stops operating. According to the invention, the convenience of solving the problem of ice blockage can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle exhaust emission, and in particular to an exhaust system and a vehicle. Background Art

[0002] For vehicles with engines, in winter in high-latitude areas, after the vehicle stops running, the water vapor in the exhaust gas will condense into ice and remain in the exhaust system. If the vehicle is in a short-distance driving state for a long time, the ice in the exhaust system will gradually increase, and eventually ice blockage will occur, causing the engine to fail to start.

[0003] At present, most of the desiccants are arranged in the exhaust system to absorb water vapor in the exhaust gas, thereby avoiding ice blockage in the exhaust system.

[0004] However, the above method requires frequent replacement of desiccant, which is a cumbersome operation. Summary of the invention

[0005] The present disclosure provides an exhaust system and a vehicle, which can solve the technical problems existing in the related technologies. The technical solutions are as follows:

[0006] In a first aspect, the present disclosure provides an exhaust system, the exhaust system comprising an intake pipe, a muffler, a heating unit, an air extraction pump and a control unit;

[0007] One end of the air inlet pipe is used to communicate with the air outlet of the engine;

[0008] One end of the muffler is connected to the other end of the intake pipe;

[0009] The heating unit is connected to the muffler;

[0010] The air pump is connected to the muffler;

[0011] The control unit is electrically connected to the engine, the heating unit and the vacuum pump respectively, and is used to: when the engine stops running, control the heating unit to operate so as to melt the ice in the muffler, and control the vacuum pump to operate so as to discharge water vapor out of the muffler.

[0012] In a possible implementation, the exhaust system further includes a humidity measuring unit, which is electrically connected to the control unit and is used to measure the humidity of the environment in which the vehicle is located;

[0013] The control unit is used to: obtain the humidity detected by the humidity measuring unit, and determine the ice increment corresponding to the current humidity in the pre-stored correspondence between humidity and ice increment, wherein the ice increment is the volume of ice increased by the freezing of water molecules in the gas in the muffler;

[0014] Determine the operating heat generation of the engine, and determine the ice reduction corresponding to the current operating heat generation in the pre-stored correspondence between the operating heat generation and the ice reduction, wherein the operating heat generation is the total heat generated by the engine from the start of operation to the stop of operation, and the ice reduction is the volume of ice melted in the muffler by absorbing the heat in the gas flowing out of the engine;

[0015] When the engine stops running, the size of the ice increase and the ice loss is determined. If the ice increase is greater than the ice loss, the heating unit is controlled to operate to melt the ice in the muffler, and the vacuum pump is controlled to operate to discharge water vapor out of the muffler.

[0016] In a possible implementation, determining the operating heat generation of the engine includes:

[0017] Determine a first running time T1 of the engine in a starting state, a second running time T2 in an idling state, and a second running time T3 in a loaded state;

[0018] The operating heat generation is determined based on the formula: Q=m1·T1+m2·T2+m3·T3, wherein Q is the operating heat generation, m1 is the heat generation coefficient of the engine in the starting state, m2 is the heat generation coefficient of the engine in the idle state, and m3 is the heat generation coefficient of the engine in the load state.

[0019] In a possible implementation, the exhaust system further includes a temperature measuring unit, which is electrically connected to the control unit and is used to measure the temperature inside the muffler;

[0020] The control unit is used to: when the engine stops running, obtain the temperature measured by the temperature measuring unit, and if the current temperature is within a preset temperature range, control the heating unit to operate to melt the ice in the muffler, and control the vacuum pump to operate to discharge water vapor out of the muffler, wherein the preset temperature range is [70°C, 150°C].

[0021] In a possible implementation, the heating unit is coated on the outside of the muffler.

[0022] In a possible implementation, the heating unit is a resistance wire, and the resistance wire is spirally coiled outside the muffler.

[0023] In a possible implementation, the exhaust system further includes a particle trap, and two ends of the particle trap are respectively connected to the other end of the intake pipe and one end of the muffler.

[0024] In a possible implementation, the vacuum pump is connected to the muffler via a bellows.

[0025] In a second aspect, the present disclosure provides a vehicle, comprising the exhaust system as in the first aspect and possible implementations thereof.

[0026] In a possible implementation, the vehicle includes a bottom plate, the air intake pipe, the muffler and the air extraction pump are respectively connected to the bottom plate, the bottom plate has a drainage hole, and the drainage hole is connected to the air outlet of the air extraction pump.

[0027] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0028] The present disclosure provides an exhaust system, in which the control unit controls the operation of the heating unit when the engine stops running to melt the ice accumulated in the muffler, and controls the operation of the suction pump to discharge the melted water in the form of water vapor out of the exhaust pipe, thereby avoiding ice blockage. Compared with the related art that solves the ice blockage problem by arranging a desiccant, the solution provided by the embodiment of the present disclosure does not require frequent replacement of the desiccant, and is easy to operate.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a schematic structural diagram of an exhaust system shown in an embodiment of the present disclosure.

[0032] Legend

[0033] 1. Intake pipe;

[0034] 2. Muffler;

[0035] 21. First-stage muffler; 22. Second-stage muffler;

[0036] 3. Heating unit;

[0037] 4. Air pump;

[0038] 5. Control unit;

[0039] 6. Temperature measurement unit;

[0040] 7. Particle catcher;

[0041] 100. Engine;

[0042] 200, bottom plate; 201, drainage hole;

[0043] 300. Bellows. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0045] The present disclosure provides an exhaust system, such as Figure 1 As shown, the exhaust system includes an intake pipe 1, a muffler 2, a heating unit 3, an air extraction pump 4 and a control unit 5.

[0046] Among them, one end of the intake pipe 1 is used to be connected to the outlet of the engine 100, one end of the muffler 2 is connected to the other end of the intake pipe 1, the heating unit 3 is connected to the muffler 2, the air pump 4 is connected to the muffler 2, and the control unit 5 is electrically connected to the engine 100, the heating unit 3, and the air pump 4 respectively, and is used for: when the engine 100 stops running, controlling the heating unit 3 to operate to melt the ice in the muffler 2, and controlling the air pump 4 to operate to discharge water vapor outside the muffler 2.

[0047] In this way, by providing the heating unit 3 and the air extraction pump 4, when the engine 100 stops running, the heating unit 3 operates to heat the muffler 2, so that the ice in the muffler 2 melts, and at the same time, the air extraction pump 4 operates to extract the humid air in the muffler 2 and discharge it outside the muffler 2, thereby eliminating the ice accumulation in the muffler 2 and avoiding ice blockage. Compared with the related art that solves the ice blockage problem by arranging a desiccant, the solution provided by the embodiment of the present disclosure does not need to frequently replace the desiccant, and is easy to operate.

[0048] In some embodiments, the exhaust system further includes a humidity measuring unit, and the control unit 5 determines the ambient humidity through the humidity measuring unit, and determines whether to control the heating unit 3 and the exhaust pump 4 to operate according to the ambient humidity.

[0049] In one example, the humidity measuring unit ( Figure 1 The humidity measuring unit is electrically connected to the control unit 5, and the humidity measuring unit is used to measure the humidity of the environment in which the vehicle is located. The control unit 5 pre-stores a corresponding relationship table between humidity (relative humidity) and ice increment.

[0050] The ice increment is the volume of ice increased by the freezing of water molecules in the gas in the muffler 2. Specifically, the ice increment refers to the volume of ice increased by the freezing of water molecules when gas with the same humidity as the environment enters and fills the inside of the muffler 2 at normal pressure, condenses inside the muffler 2, and freezes water molecules.

[0051] Furthermore, the control unit 5 is electrically connected to the engine 100 , and the control unit 5 is also used to determine the heat generated by the engine 100 during operation.

[0052] The operating heat generation is the total heat generated by the engine from the start of operation to the stop of operation.

[0053] In implementation, the control unit 5 is electrically connected to the engine 100. During the entire process from the start of operation to the stop of operation of the engine 100, the control unit 5 can determine the operation time of the engine 100 in each state, and calculate the total heat generated by the engine 100 during the entire process from the start of operation to the stop of operation by accumulating, and this total heat is the above-mentioned operation heat generation. Correspondingly, the control unit 5 also pre-stores a corresponding relationship table between the operation heat generation and the ice reduction, through which the control unit 5 can determine the ice reduction corresponding to the current operation heat generation.

[0054] The ice reduction is the volume of ice melted in the muffler 2 by absorbing the heat in the gas flowing out of the engine 100, that is, the volume of ice accumulated in the muffler 2 is reduced after the engine 100 goes through the entire process from starting to stopping.

[0055] In implementation, the control unit 5 first obtains the humidity detected by the humidity measuring unit, and determines the ice increment corresponding to the current humidity in the pre-stored correspondence between humidity and ice increment. At the same time, the control unit 5 determines the operating heat generation of the engine 100, and determines the ice reduction corresponding to the current operating heat generation in the pre-stored correspondence between operating heat generation and ice reduction. Subsequently, when the engine 100 stops running, the control unit 5 determines the size of the ice increment and ice reduction. If the ice increment is greater than the ice reduction, the heating unit 3 is controlled to operate to melt the ice in the muffler 2, and the vacuum pump 4 is controlled to operate to discharge water vapor out of the muffler 2.

[0056] In this way, by comparing the size relationship between the ice increase and the ice decrease, and controlling the heating unit 3 to operate when the ice increase is greater than the ice decrease, it can be ensured that the volume of ice accumulation in the muffler 2 does not increase, thereby avoiding ice blockage.

[0057] At the same time, compared with the technical solution in which the control unit 5 controls the heating unit 3 every time the engine 100 stops running, the technical solution in the above example only controls the heating unit 3 to operate when the ice increase is greater than the ice decrease, which is more energy-efficient.

[0058] In one example, the control unit 5 can determine the heat generated by the operation of the engine 100 through the following process:

[0059] The control unit 5 is electrically connected to the engine 100, and the control unit 5 determines the first operating time T1 of the engine 100 in the starting state, the second operating time T2 in the idle state, and the second operating time T3 in the load state. The operating heat generation is determined based on the formula: Q=m1·T1+m2·T2+m3·T3.

[0060] Wherein, Q is the operating heat generation, m1 is the heat generation coefficient of the engine 100 in the starting state, m2 is the heat generation coefficient of the engine 100 in the idling state, and m3 is the heat generation coefficient of the engine 100 in the load state.

[0061] It can be understood that the above heat generation coefficients m1, m2 and m3 can be calculated by technicians based on experiments, and the embodiments of the present disclosure do not limit this.

[0062] In some possible embodiments, the control unit 5 can determine the accumulated ice amount in the muffler 2, and when the current accumulated ice amount is greater than or equal to a preset ice amount, control the heating unit 3 to operate to melt the ice in the muffler 2, and control the vacuum pump 4 to operate to discharge water vapor outside the muffler 2.

[0063] In some possible embodiments, the exhaust system further includes a temperature measuring unit 6 , which is electrically connected to the control unit 5 and is used to measure the temperature inside the muffler 2 .

[0064] The control unit 5 is used to: when the engine 100 stops running, obtain the temperature measured by the temperature measuring unit 6. If the current temperature is within a preset temperature range, control the heating unit 3 to run for a preset time to melt the ice in the muffler 2, and control the vacuum pump 4 to run so that water vapor is discharged outside the muffler 2.

[0065] The preset temperature range is [70°C, 150°C] and the preset duration can be 10 minutes.

[0066] The above-mentioned preset temperature range and preset time can be set by technicians according to actual needs, and the embodiments of the present disclosure are not limited to this.

[0067] Exemplarily, the temperature measuring unit 6 may be a temperature sensor, which is disposed on a side of the muffler 2 close to the engine 100 .

[0068] In some embodiments, the heating unit 3 is arranged outside the muffler 2 .

[0069] In implementation, the muffler 2 is connected to the engine 100 through a pipeline, and the exhaust gas flowing out of the engine 100 is high-temperature gas. The high-temperature gas contacts the ice accumulated in the muffler 2 away from the inner wall of the muffler 2 and melts first. Accordingly, the heating unit 3 is arranged outside the muffler 2, so that the ice accumulated in the muffler 2 close to the inner wall of the muffler 2 can first receive the heat emitted by the heating unit 3, thereby improving the efficiency of melting the accumulated ice.

[0070] In one example, if Figure 1 As shown, the vehicle includes a bottom plate 200 , the muffler 2 is located above the bottom plate 200 and is spaced apart from the bottom plate 200 , and the heating unit 3 is located in the gap between the muffler 2 and the bottom plate 200 and is connected to the outer wall of the muffler 2 .

[0071] In practice, water vapor inside the muffler 2 is easily condensed to form ice at the bottom of the muffler 2 . Disposing the heating unit 3 in the gap between the muffler 2 and the bottom plate 200 is beneficial to improving the melting efficiency of the ice.

[0072] In some possible embodiments, the heating unit 3 is coated on the outside of the muffler 2 .

[0073] In one example, the heating unit 3 is a resistance wire, which is spirally coiled outside the muffler 2 .

[0074] The connection method between the heating unit 3 and the muffler 2 can be bonding, welding, or snap-on. The technicians can set the connection method between the heating unit 3 and the muffler 2 according to actual needs, and the embodiments of the present disclosure do not limit this.

[0075] In some possible embodiments, the exhaust system further includes a particle trap 7 .

[0076] like Figure 1 As shown, the particulate trap 7 is located at the rear end of the engine 100 and at the front end of the muffler 2, and both ends of the particulate trap 7 are respectively connected to the other end of the intake pipe 1 and one end of the muffler 2.

[0077] In practice, the particulate filter is a device used to reduce the emission of particulate matter in automobile exhaust gas, and can absorb part of the water vapor in the exhaust gas discharged by the engine 100 to reduce the volume of ice accumulation in the muffler 2.

[0078] In some possible embodiments, the muffler 2 includes a primary muffler 21 and a secondary muffler 22 .

[0079] like Figure 1As shown, the first-stage muffler 21 is connected to the other end of the particle trap 7 through a first connecting pipe, the second-stage muffler 22 is connected to the first-stage muffler 21 through a second connecting pipe, and the heating unit 3 is arranged in the gap between the first-stage muffler 21 and the bottom plate 200, and is connected to the outer wall of the first-stage muffler 21.

[0080] In practice, setting up a multi-stage muffler can improve the muffler effect of the exhaust gas.

[0081] In some possible embodiments, the vacuum pump 4 is connected to the muffler 2 via a bellows.

[0082] like Figure 1 As shown, the air pump 4 is arranged above the bottom plate 200 and connected to the bottom plate 200. The side of the muffler 2 is provided with an air outlet hole connected to the inner and outer walls. The air inlet of the air pump 4 is connected to the air outlet hole through the bellows 300. In this way, the difficulty of arranging the air pump 4 can be reduced.

[0083] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0084] The present disclosure provides an exhaust system, which includes an intake pipe 1, a muffler 2, a heating unit 3, an air pump 4 and a control unit 5. One end of the intake pipe 1 is used to communicate with the air outlet of the engine 100, one end of the muffler 2 is connected to the other end of the intake pipe 1, the heating unit 3 is connected to the muffler 2, the air pump 4 is connected to the muffler 2, and the control unit 5 is electrically connected to the engine 100, the heating unit 3 and the air pump 4 respectively, and is used to: when the engine 100 stops running, control the heating unit 3 to operate to melt the ice in the muffler 2, and control the air pump 4 to operate so that water vapor is discharged outside the muffler 2. In this way, by providing the heating unit 3 and the air pump 4, when the engine 100 stops running, the heating unit 3 operates to heat the muffler 2 so that the ice in the muffler 2 melts, and at the same time, the air pump 4 operates to extract the humid air in the muffler 2 and discharge it outside the muffler 2, thereby eliminating ice accumulation in the muffler 2 and avoiding ice blockage. Compared with the related art in which the ice blockage problem is solved by arranging desiccants, the solution provided by the embodiment of the present disclosure does not require frequent replacement of desiccants and is easy to operate.

[0085] An embodiment of the present disclosure provides a vehicle, which includes the above-mentioned exhaust system.

[0086] In some possible embodiments, Figure 1 As shown, the floor panel 200 of the vehicle has a drainage hole 201 .

[0087] like Figure 1As shown, the vehicle includes a bottom plate 200 , the air intake pipe 1 , the muffler 2 and the air extraction pump 4 are respectively connected to the bottom plate 200 , and the bottom plate 200 has a drainage hole 201 , which is connected to the air outlet of the air extraction pump 4 .

[0088] In this way, the humid air discharged by the suction pump 4 can leave the vehicle through the drainage hole 201 .

[0089] Optionally, the number of the drainage holes 201 may be one or more, and technicians may set the number, position and shape of the drainage holes 201 according to actual needs, which is not limited in the embodiments of the present disclosure.

[0090] The present disclosure does not specifically limit the type of vehicle, for example, a sedan, a bus, a truck, a sport utility vehicle (SUV), etc.

[0091] The exhaust system in the disclosed embodiment can be used in hybrid electric vehicles (HEV), such as extended-range vehicles, plug-in vehicles, etc., and can also be used in traditional fuel vehicles (Internal Combustion Engine, ICE).

[0092] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0093] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0094] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0095] It can be further understood that the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0096] It is further understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection without other components between the two, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0097] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0098] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the scheme disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the scope of rights.

[0099] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. An exhaust system, characterized in that: The exhaust system is applied to a vehicle, and comprises an intake pipe (1), a muffler (2), a heating unit (3), an air extraction pump (4) and a control unit (5); One end of the air intake pipe (1) is used to communicate with the air outlet of the engine (100); One end of the muffler (2) is connected to the other end of the intake pipe (1); The heating unit (3) is connected to the muffler (2); The air pump (4) is connected to the muffler (2); The control unit (5) is electrically connected to the engine (100), the heating unit (3), and the vacuum pump (4) respectively, and is used to: when the engine (100) stops running, control the heating unit (3) to operate so as to melt the ice in the muffler (2), and control the vacuum pump (4) to operate so as to discharge water vapor out of the muffler (2).

2. The exhaust system according to claim 1, characterized in that The exhaust system further comprises a humidity measuring unit, which is electrically connected to the control unit (5) and is used to measure the humidity of the environment in which the vehicle is located; The control unit (5) is used to: obtain the humidity detected by the humidity measuring unit, and determine the ice increment corresponding to the current humidity in the pre-stored correspondence between humidity and ice increment, wherein the ice increment is the volume of ice increased by freezing of water molecules in the gas in the muffler (2); Determining the operating heat generation of the engine (100), and determining the ice reduction corresponding to the current operating heat generation in a pre-stored correspondence between the operating heat generation and the ice reduction, wherein the operating heat generation is the total heat generated by the engine from the start of operation to the stop of operation, and the ice reduction is the volume of ice melted in the muffler (2) by absorbing the heat in the gas flowing out of the engine (100); When the engine (100) stops running, the size of the ice increase and the ice reduction is determined; if the ice increase is greater than the ice reduction, the heating unit (3) is controlled to operate to melt the ice in the muffler (2); and the vacuum pump (4) is controlled to operate to discharge water vapor out of the muffler (2).

3. The exhaust system according to claim 2, characterized in that: Determining the operating heat generation of the engine (100) comprises: Determining a first operating time T1 of the engine (100) in a starting state, a second operating time T2 in an idling state, and a second operating time T3 in a loaded state; The operating heat generation is determined based on the formula: Q=m1·T1+m2·T2+m3·T3, wherein Q is the operating heat generation, m1 is the heat generation coefficient of the engine (100) in the starting state, m2 is the heat generation coefficient of the engine (100) in the idling state, and m3 is the heat generation coefficient of the engine (100) in the load state.

4. The exhaust system according to claim 1, characterized in that The exhaust system further comprises a temperature measuring unit (6), wherein the temperature measuring unit (6) is electrically connected to the control unit (5) and is used to measure the temperature inside the muffler (2); The control unit (5) is used to obtain the temperature measured by the temperature measuring unit (6) when the engine (100) stops running, and if the current temperature is within a preset temperature range, control the heating unit (3) to operate for a preset time to melt the ice in the muffler (2), and control the vacuum pump (4) to operate so that water vapor is discharged from the muffler (2), wherein the preset temperature range is [70°C, 150°C].

5. The exhaust system according to claim 1, characterized in that The heating unit (3) is coated on the outside of the muffler (2).

6. The exhaust system according to claim 5, characterized in that The heating unit (3) is a resistance wire, and the resistance wire is spirally coiled outside the muffler (2).

7. The exhaust system according to claim 1, characterized in that The exhaust system further comprises a particle trap (7), the two ends of which are respectively connected to the other end of the intake pipe (1) and one end of the muffler (2).

8. The exhaust system according to claim 1, characterized in that The air suction pump (4) is connected to the muffler (2) via a bellows (300).

9. A vehicle, characterized in that: The vehicle comprises an exhaust system as claimed in any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle comprises a bottom plate (200), the air intake pipe (1), the muffler (2) and the air extraction pump (4) are respectively connected to the bottom plate (200), the bottom plate (200) has a drainage hole (201), and the drainage hole (201) is connected to the air outlet of the air extraction pump (4).

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