A two-stage muffler for automobile exhaust integrated with temperature difference power generation

Abstract

The present invention discloses an automobile exhaust integrated thermoelectric power generation two-stage muffler, comprising a muffler shell, a front cover and a rear cover are installed at both ends of the muffler shell, a vent pipe connected to the engine end is provided on the front cover, a vent pipe connected to the exhaust pipe is provided on the rear cover, a muffler device and a thermoelectric power generation module connected by a connecting plate are installed in combination in the muffler shell, a connecting plate is provided with a connecting portion connecting the two sides of the connecting plate, and the muffler device and the thermoelectric power generation module are respectively provided with at least one group. Beneficial effect: By randomly combining the muffler device and the thermoelectric power generation module, the space occupancy rate of the muffler is reduced, and the structure of various vehicle models can be adapted, the structure is flexible and changeable, and it is easy to disassemble. At the same time, by combining various structures of the muffler plate, the muffler effect can be improved, the structure is more compact, and space is saved. The exhaust heat energy recovery rate can also be improved. The heat exchange efficiency can be improved through the heat diffusion plate, the power generation is stable, and the heat energy loss is reduced.

Description

Technical Field

[0001] The invention relates to an automobile exhaust gas temperature difference power generation muffler, and in particular provides an automobile exhaust gas integrated temperature difference power generation two-stage muffler, belonging to the technical field of vehicle-mounted mufflers. Background Art

[0002] Since the beginning of the 21st century, with the rapid growth of the national economy and the localization of the automobile industry, cars have gone from being a symbol of high consumption levels to ordinary people's families. With the gradual increase in automobile trade volume and ownership, the problem of exhaust emission noise pollution in cities has become particularly serious. In order to reduce the noise pollution caused by automobile exhaust emissions, manufacturers usually install mufflers in automobile exhaust emission devices to reduce the noise pollution caused by exhaust emissions. In the study, it was found that only a small part of the energy generated by the combustion of fuel in the internal combustion engine of the automobile is used for the driving of the car, and only a part of the heat energy generated is used for power output, and another part of the heat energy enters the atmosphere with the exhaust gas emissions. At the same time, most of the energy generated by fuel combustion is not effectively utilized. Therefore, it has become an important research direction to rationally utilize the waste heat generated by the combustion of fuel in the internal combustion engine of the automobile and improve the utilization rate of the heat energy generated by the combustion of fuel in the automobile.

[0003] The thermoelectric power generation device produced by the prior art is installed separately in the automobile exhaust emission device. After the thermoelectric power generation device performs thermoelectric power generation on the internal energy in the automobile exhaust emission, the exhaust gas is discharged into the muffler for muffler treatment. When the thermoelectric power generation device is installed separately, the space occupied by the thermoelectric power generation device is large, and the heat energy generated by the combustion of fuel will be lost when the exhaust gas circulates in the exhaust system, resulting in low power generation efficiency and insufficient stability. At the same time, as the models of automobiles are becoming more and more diverse, the overall structure of the muffler is single and fixed, and it cannot be flexibly adapted to various models. In addition, when the muffler is disassembled, it is necessary to disassemble the entire muffler one by one, which is difficult to disassemble and not easy to install. Summary of the invention

[0004] Purpose of the invention: In view of the shortcomings of the prior art, the present invention provides an integrated automobile exhaust thermoelectric power generation two-stage silencer, which integrates the silencer device and the thermoelectric power generation module into an integrated design to reduce the space occupied by installing the thermoelectric power generation module separately, and randomly combines the silencer device and the thermoelectric power generation module to adapt to various space capacities.

[0005] Technical solution: An integrated automobile exhaust temperature difference power generation two-stage muffler includes a muffler shell, a front cover and a rear cover are installed at both ends of the muffler shell, the front cover is provided with a ventilation pipe connected to the engine end, and the rear cover is provided with a ventilation pipe connected to the exhaust pipe, and a muffler device and a temperature difference power generation module connected by a connecting plate are installed in combination in the muffler shell, and the connecting plate is provided with a connecting part connecting the two sides of the connecting plate, and the muffler device and the temperature difference power generation module are respectively provided with at least one group.

[0006] The present invention randomly combines the silencer and the temperature difference power generation module so that the overall structure of the silencer can be varied. At the same time, the silencer and the temperature difference power generation module can be adjusted to flexibly adapt to various vehicle models with different capacities, thereby reducing the space occupied by the silencer. The silencer is also easy to disassemble and install.

[0007] Preferably, in order to improve the silencing effect, the silencing device includes a silencing disk and a silencing pipe penetrating the silencing disk, and the pipe wall of the silencing pipe is uniformly provided with through holes. The silencing device structure in which the silencing pipe with the pipe wall uniformly provided with through holes is installed on the silencing disk can achieve the silencing effect while facilitating the disassembly and replacement of the silencing device.

[0008] Preferably, in order to further improve the muffler effect when adapting to various models of different sizes and capacities, the muffler device includes at least two muffler discs connected in series. When multiple muffler discs are used in series, the muffler pipes are staggered, thereby further extending the time for the exhaust gas to flow in the muffler, improving the exhaust gas recovery rate, and further improving the muffler effect.

[0009] Preferably, in order to improve the silencing effect, the silencing device includes a silencing plate, and the bottom of the silencing plate is evenly distributed with silencing bottom holes. By opening evenly distributed silencing bottom holes at the bottom of the silencing plate to improve the silencing effect, the distance between the internal structures can be reduced, making the structure more compact.

[0010] Preferably, in order to make the internal structure of the muffler more compact, the muffler device includes at least two muffler discs connected in series. When multiple muffler discs are used in series, the distance between the multiple muffler discs is small, which can make the internal structure of the muffler more compact, save more space, and can be adapted to vehicles with smaller capacity.

[0011] Preferably, in order to improve the sound-absorbing effect, the sound-absorbing device includes a sound-absorbing disk with a sound-absorbing pipe and a sound-absorbing disk with a sound-absorbing bottom hole, the wall of the sound-absorbing pipe is evenly provided with through holes, and the sound-absorbing disk with the sound-absorbing pipe and the sound-absorbing disk with the sound-absorbing bottom hole are connected in series with each other.

[0012] Preferably, in order to improve the noise reduction effect and the utilization rate of the exhaust gas waste heat, the silencer is provided with at least two groups, and each group of silencers is connected with a temperature difference power generation module through a connecting plate. By randomly combining the silencer and the temperature difference power generation module, it can be assembled into a structure that meets its own needs, and the structure is more flexible and changeable. At the same time, the time for the exhaust gas to circulate in the silencer can also be adjusted, thereby improving the noise reduction effect and the exhaust gas recovery rate.

[0013] Preferably, in order to make the temperature difference power generation module evenly heated and improve the power generation efficiency, the temperature difference power generation module includes a temperature difference power generation device, and the outer side and the inner side of the temperature difference power generation device are respectively installed with a cold end soaking plate and a hot end soaking plate, and the hot end soaking plate is sealed and connected to the connection plate. By placing the cold end soaking plate and the hot end soaking plate in close contact with the inner and outer sides of the temperature difference power generation device, the temperature difference power generation device can be heated more evenly, reducing the heat energy loss during heat exchange, improving the heat exchange efficiency, and making the power generation more stable.

[0014] Preferably, in order to make the silencer structure compact and improve the power generation efficiency, a water tank layer is provided between the outer diameter of the cold end heat sink and the inner diameter of the silencer shell. The water tank layer, as the cold end of the temperature difference power generation device, can make the temperature difference power generation device generate electricity more stably and improve the power generation efficiency through uniform contact with the cold end heat sink.

[0015] Beneficial effect: The present invention reduces the space occupancy rate of the silencer by randomly combining the silencer and the temperature difference power generation module, so that it can be combined into a structure that conforms to various vehicle models of different capacity sizes. The structure is flexible and easy to disassemble. At the same time, the silencer effect can be improved by combining various structures of the silencer disc, so that the structure can be more compact and space-saving on the basis of flexibility. It can also extend the time for the exhaust gas to circulate in the silencer and improve the exhaust gas recovery rate. The structure of the cold-end heat spreader and the hot-end heat spreader are close to the temperature difference power generation device to improve the heat exchange efficiency, stabilize the power generation, and reduce the heat energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is a cross-sectional view of the internal structure of the muffler;

[0018] Figure 2 The overall structure diagram of the muffler is shown in Figure 1.

[0019] Figure 3The overall structure diagram of the muffler;

[0020] Figure 4 It is a structural diagram of a muffler disc with a muffler pipe;

[0021] Figure 5 It is a structural diagram of a silencer plate with a silencer bottom hole;

[0022] Figure 6 This is the structure diagram of the temperature difference power generation module;

[0023] Figure 7 It is a cross-sectional view of an embodiment of the internal structure of a muffler;

[0024] Figure 8 It is a cross-sectional view of the second embodiment of the internal structure of the muffler;

[0025] Fig. 9 This is a cross-sectional view of embodiment 3 of the internal structure of the muffler. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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 cannot be understood as a limitation on the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] like Figure 1-Figure 6As shown, an automobile exhaust integrated thermoelectric power generation two-stage muffler includes a muffler shell 1, a front cover 11 and a rear cover 12 are installed at both ends of the muffler shell 1, the front cover 11 is provided with a ventilation pipe connected to the engine end, and the rear cover 12 is provided with a ventilation pipe connected to the exhaust pipe, and a muffler device 3 and a thermoelectric power generation module 4 connected by a connecting plate 2 are installed in combination in the muffler shell 1, and a connecting portion 21 connecting the two sides of the connecting plate 2 is provided on the connecting plate 2, and the muffler device 3 and the thermoelectric power generation module 4 are respectively provided with at least one group.

[0030] The present invention randomly combines the silencer 3 and the temperature difference power generation module 4 so that the overall structure of the silencer can be varied. At the same time, the silencer 3 and the temperature difference power generation module 4 can be adjusted to flexibly adapt to various vehicle models with different capacities, thereby reducing the space occupied by the silencer. The silencer is also easy to disassemble and install.

[0031] Embodiment 1

[0032] like Figure 7 As shown, a group of silencers 3 and a group of temperature difference power generation modules 4 are assembled and installed through a connecting plate 2, and the temperature difference power generation module 4 is installed in a part close to the front cover 11. Since the temperature of the exhaust gas is the highest when it first enters, the temperature difference power generation module 4 is arranged in a part close to the front cover 11, which can reduce the heat energy loss of the exhaust gas during the flow process and improve the power generation efficiency.

[0033] Silencer embodiment 1

[0034] like Figure 4 and Figure 7 As shown, in order to improve the silencing effect, the silencing device 3 includes a silencing disk 311 and a silencing pipe 312 penetrating the silencing disk 311, and the pipe wall of the silencing pipe 312 is evenly distributed with through holes. The structure of the silencing device 3 in which the silencing pipe 312 with evenly distributed through holes is installed on the silencing disk 311 can achieve the silencing effect while facilitating the disassembly and replacement of the silencing device.

[0035] In order to further improve the muffler effect when adapting to various vehicle models of different sizes and capacities, the muffler device 3 includes at least two muffler discs 311 connected in series. When multiple muffler discs 311 are used in series, the muffler pipes 312 are staggered, thereby further extending the time for the exhaust gas to flow in the muffler, improving the exhaust gas recovery rate, and further improving the muffler effect (not shown in the figure for this embodiment).

[0036] Silencing device embodiment 2 (not shown in the figure)

[0037] like Figure 5As shown, in order to improve the sound insulation effect, a sound insulation disk 313 with sound insulation bottom holes evenly distributed on the bottom can also be used as the sound insulation device 3. By opening evenly distributed sound insulation bottom holes on the bottom of the sound insulation disk 313 to improve the sound insulation effect, the distance between the internal structures can be reduced, making the structure more compact.

[0038] In order to make the internal structure of the muffler more compact, the muffler device 3 includes at least two muffler discs 313 connected in series. When multiple muffler discs 313 are used in series, the distance between the multiple muffler discs 313 is small, which can make the internal structure of the muffler more compact, save more space, and can be adapted to vehicles with smaller capacity.

[0039] Silencing device embodiment 3 (not shown in the figure)

[0040] In order to improve the sound-absorbing effect, the sound-absorbing device 3 includes a sound-absorbing disk 311 with a sound-absorbing pipe 312 and a sound-absorbing disk 313 with a sound-absorbing bottom hole. The wall of the sound-absorbing pipe 312 is evenly distributed with through holes. The sound-absorbing disk 311 with the sound-absorbing pipe 312 and the sound-absorbing disk 313 with the sound-absorbing bottom hole are connected in series.

[0041] Embodiment 2

[0042] like Figure 8 As shown, two groups of silencers 3 and one group of temperature difference power generation modules 4 are assembled and installed through a connecting plate 2, and the silencers 3 are installed on both sides of the temperature difference power generation module 4, so that the exhaust gas can be expanded and reduced in pressure twice, thereby improving the silencer effect, extending the flow time of the exhaust gas in the silencer, reducing the heat energy loss of the exhaust gas during the flow process, and improving the power generation efficiency.

[0043] Silencer embodiment 1

[0044] like Figure 4 and Figure 8 As shown, in order to improve the silencing effect, the silencing device 3 includes a silencing disk 311 and a silencing pipe 312 penetrating the silencing disk 311, and the pipe wall of the silencing pipe 312 is evenly distributed with through holes. The structure of the silencing device 3 in which the silencing pipe 312 with evenly distributed through holes is installed on the silencing disk 311 can achieve the silencing effect while facilitating the disassembly and replacement of the silencing device.

[0045] like Figure 1 As shown, in order to further improve the muffler effect when adapting to various models of different sizes and capacities, the muffler device 3 includes at least two muffler discs 311 connected in series. When multiple muffler discs 311 are used in series, the muffler pipes 312 are staggered, thereby further extending the time for the exhaust gas to flow in the muffler, improving the exhaust gas recovery rate, and further improving the muffler effect.

[0046] Silencing device embodiment 2 (not shown in the figure)

[0047] like Figure 5 As shown, in order to improve the sound insulation effect, a sound insulation disk 313 with sound insulation bottom holes evenly distributed on the bottom can also be used as the sound insulation device 3. By opening evenly distributed sound insulation bottom holes on the bottom of the sound insulation disk 313 to improve the sound insulation effect, the distance between the internal structures can be reduced, making the structure more compact.

[0048] In order to make the internal structure of the muffler more compact, the muffler device 3 includes at least two muffler discs 313 connected in series. When multiple muffler discs 313 are used in series, the distance between the multiple muffler discs 313 is small, which can make the internal structure of the muffler more compact, save more space, and can be adapted to vehicles with smaller capacity.

[0049] Silencing device embodiment 3 (not shown in the figure)

[0050] In order to improve the sound-absorbing effect, the sound-absorbing device 3 includes a sound-absorbing disk 311 with a sound-absorbing pipe 312 and a sound-absorbing disk 313 with a sound-absorbing bottom hole. The wall of the sound-absorbing pipe 312 is evenly distributed with through holes. The sound-absorbing disk 311 with the sound-absorbing pipe 312 and the sound-absorbing disk 313 with the sound-absorbing bottom hole are connected in series.

[0051] Embodiment 3

[0052] like Fig. 9 As shown, two groups of silencers 3 and two groups of temperature difference power generation modules 4 are assembled and installed in sequence through the connecting plate 2, and the silencers 3 are installed on both sides of the temperature difference power generation module 4, so that the exhaust gas can be expanded and reduced in pressure for multiple times, thereby improving the silencer effect, extending the flow time of the exhaust gas in the silencer, reducing the heat energy loss of the exhaust gas during the flow process, and improving the power generation efficiency. At the same time, it can meet the needs of vehicles with higher requirements for heat exchange and silencer effects.

[0053] Silencer embodiment 1

[0054] like Figure 4 and Fig. 9 As shown, in order to improve the silencing effect, the silencing device 3 includes a silencing disk 311 and a silencing pipe 312 penetrating the silencing disk 311, and the pipe wall of the silencing pipe 312 is evenly distributed with through holes. The structure of the silencing device 3 in which the silencing pipe 312 with evenly distributed through holes is installed on the silencing disk 311 can achieve the silencing effect while facilitating the disassembly and replacement of the silencing device.

[0055] In order to further improve the muffler effect when adapting to various vehicle models of different sizes and capacities, the muffler device 3 includes at least two muffler discs 311 connected in series. When multiple muffler discs 311 are used in series, the muffler pipes 312 are staggered, thereby further extending the time for the exhaust gas to flow in the muffler, improving the exhaust gas recovery rate, and further improving the muffler effect (not shown in the figure for this embodiment).

[0056] Silencing device embodiment 2 (not shown in the figure)

[0057] like Figure 5 As shown, in order to improve the sound insulation effect, a sound insulation disk 313 with sound insulation bottom holes evenly distributed on the bottom can also be used as the sound insulation device 3. By opening evenly distributed sound insulation bottom holes on the bottom of the sound insulation disk 313 to improve the sound insulation effect, the distance between the internal structures can be reduced, making the structure more compact.

[0058] In order to make the internal structure of the muffler more compact, the muffler device 3 includes at least two muffler discs 313 connected in series. When multiple muffler discs 313 are used in series, the distance between the multiple muffler discs 313 is small, which can make the internal structure of the muffler more compact, save more space, and can be adapted to vehicles with smaller capacity.

[0059] Silencing device embodiment 3 (not shown in the figure)

[0060] In order to improve the sound-absorbing effect, the sound-absorbing device 3 includes a sound-absorbing disk 311 with a sound-absorbing pipe 312 and a sound-absorbing disk 313 with a sound-absorbing bottom hole. The wall of the sound-absorbing pipe 312 is evenly distributed with through holes. The sound-absorbing disk 311 with the sound-absorbing pipe 312 and the sound-absorbing disk 313 with the sound-absorbing bottom hole are connected in series.

[0061] In the above embodiments, in order to improve the noise reduction effect and the utilization rate of the exhaust gas waste heat, at least two groups of the muffler 3 are provided, and a temperature difference power generation module 4 is connected between each group of mufflers 3 through a connecting plate 2. By randomly combining the muffler 3 and the temperature difference power generation module 4, it is possible to assemble a structure that meets its own needs, and the structure is more flexible and changeable. At the same time, the time for the exhaust gas to circulate in the muffler can also be adjusted, thereby improving the noise reduction effect and the exhaust gas recovery and utilization rate.

[0062] In order to make the temperature difference power generation module 4 evenly heated and improve the power generation efficiency, the temperature difference power generation module 4 includes a temperature difference power generation device 41, and a cold end soaking plate 42 and a hot end soaking plate 43 are respectively installed on the outside and inside of the temperature difference power generation device 41, and the hot end soaking plate 43 is sealed and connected to the connection plate 2. By making the cold end soaking plate 42 and the hot end soaking plate 43 close to the inside and outside of the temperature difference power generation device 41, the temperature difference power generation device 41 can be heated more evenly, the heat energy loss during heat exchange can be reduced, the heat exchange efficiency can be improved, and the power generation can be more stable.

[0063] In order to make the silencer structure compact and improve the power generation efficiency, a water tank layer 5 is provided between the outer diameter of the cold end heat sink 42 and the inner diameter of the silencer housing 1. The water tank layer 5 serves as the cold end of the temperature difference power generation device 41. By uniformly contacting the cold end heat sink 42, the temperature difference power generation device 41 can generate power more stably and improve the power generation efficiency.

[0064] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0065] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automobile exhaust integrated thermoelectric power generation two-stage muffler, comprising a muffler shell (1), a front cover (11) and a rear cover (12) being installed at both ends of the muffler shell (1), the front cover (11) being provided with a vent pipe connected to an engine end, the rear cover (12) being provided with a vent pipe connected to an exhaust pipe, a muffler device (3) and a thermoelectric power generation module (4) connected via a connecting plate (2) being installed in combination in the muffler shell (1), the connecting plate (2) being provided with a connecting portion (21) connecting two sides of the connecting plate (2), the muffler device (3) and the thermoelectric power generation module (4) being provided in at least one group respectively; It is characterized in that The silencer device (3) comprises a silencer disk (311) and a silencer pipe (312) penetrating the silencer disk (311), and the silencer pipe (312) has through holes evenly distributed on the pipe wall; The silencer device (3) comprises at least two silencer discs (311) connected in series; the silencer pipes (312) are arranged in a staggered manner; At least two groups of the silencer devices (3) are provided, and each group of silencer devices (3) is connected to a temperature difference power generation module (4) via a connection plate (2).

2. An automobile exhaust integrated thermoelectric power generation two-stage muffler, comprising a muffler shell (1), a front cover (11) and a rear cover (12) being installed at both ends of the muffler shell (1), the front cover (11) being provided with a vent pipe connected to an engine end, the rear cover (12) being provided with a vent pipe connected to an exhaust pipe, a muffler device (3) and a thermoelectric power generation module (4) connected via a connecting plate (2) being installed in combination in the muffler shell (1), the connecting plate (2) being provided with a connecting portion (21) connecting two sides of the connecting plate (2), and at least one group of the muffler device (3) and the thermoelectric power generation module (4) being provided respectively; It is characterized in that The silencer device (3) comprises a silencer plate (313), and silencer bottom holes are evenly distributed on the bottom of the silencer plate (313); The silencer device (3) comprises at least two silencer discs (313) connected in series with each other; At least two groups of the silencer devices (3) are provided, and each group of silencer devices (3) is connected to a temperature difference power generation module (4) via a connection plate (2).

3. An automobile exhaust integrated thermoelectric power generation two-stage muffler, comprising a muffler shell (1), a front cover (11) and a rear cover (12) being installed at both ends of the muffler shell (1), the front cover (11) being provided with a vent pipe connected to an engine end, the rear cover (12) being provided with a vent pipe connected to an exhaust pipe, a muffler device (3) and a thermoelectric power generation module (4) connected via a connecting plate (2) being installed in combination in the muffler shell (1), the connecting plate (2) being provided with a connecting portion (21) connecting two sides of the connecting plate (2), and at least one group of the muffler device (3) and the thermoelectric power generation module (4) being provided respectively; It is characterized in that The silencer device (31) comprises a silencer disk (311) with a silencer pipe (312) and a silencer disk (313) with a silencer bottom hole, the silencer pipe (312) has through holes evenly distributed on its wall, and the silencer disk (311) with the silencer pipe (312) and the silencer disk (313) with the silencer bottom hole are connected in series with each other; At least two groups of the silencer devices (3) are provided, and each group of silencer devices (3) is connected to a temperature difference power generation module (4) via a connection plate (2).

4. The automobile exhaust integrated temperature difference power generation two-stage muffler according to claim 1, 2 or 3, characterized in that: The temperature difference power generation module (4) comprises a temperature difference power generation device (41), and a cold end soaking plate (42) and a hot end soaking plate (43) are respectively installed on the outside and inside of the temperature difference power generation device (41), and the hot end soaking plate (43) is sealedly connected to the connection plate (2).

5. The automobile exhaust integrated temperature difference power generation two-stage muffler according to claim 4 is characterized in that: A water tank layer (5) is provided between the outer diameter of the cold end soaking plate (42) and the inner diameter of the muffler housing (1).

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