A multi-stage temperature difference power generation device with integrated exhaust gas silencing function

Abstract

The present invention discloses a multi-stage temperature difference power generation device with integrated exhaust gas silencing function, including a hot end heat exchanger, an air intake pipe and an exhaust pipe respectively installed at both ends of the hot end heat exchanger, the outer surface of the hot end heat exchanger is connected to the cold end radiator through a temperature difference power generation module, a flat plate fin parallel to the air intake direction is arranged in the hot end heat exchanger, a diverter plate perpendicular to the air intake direction is installed in the hot end heat exchanger, a diverter hole is opened on the diverter plate, and a silencer whose cross section gradually expands along the air intake direction is installed on the diverter plate. The hot end heat exchanger is divided into two spaces by arranging a diverter plate inside the hot end heat exchanger, providing a suitable space for installing the silencer, and the space is further divided into a silencer chamber and a heat exchange chamber by using the structure of the silencer, so that the hot end heat exchanger can not only ensure the original heat exchange power generation function, but also have the exhaust gas silencing effect, realizing the integration of the hot end heat exchanger and the silencer, and reducing the occupied space.

Description

Technical Field

[0001] The invention relates to a temperature difference power generation device, in particular to a multi-stage temperature difference power generation device with integrated exhaust gas silencing function. Background Art

[0002] Low carbon and environmental protection have become the themes of today's society. With the proposal of the dual carbon goals of "carbon peak and carbon neutrality", the recycling and reuse of automobile exhaust has also attracted more and more attention. During the driving process of traditional internal combustion engine vehicles, only about 25%-30% of the energy of fuel combustion can be converted into the kinetic energy required for normal driving of the vehicle, and about 40% of the energy is discharged into the atmosphere in the form of exhaust, causing serious environmental pollution and energy waste.

[0003] Thermoelectric power generation technology can convert low-grade heat energy in exhaust gas into high-grade electrical energy and store it in batteries or directly supply it to vehicle electrical appliances. The basic principle of thermoelectric power generation technology is to use the Seebeck effect of thermoelectric materials to convert heat energy into electrical energy. Thermoelectric materials are divided into P-type semiconductors and N-type semiconductors. These two types of semiconductors are connected together to form a pair of PN junctions. If a temperature difference is formed at both ends of the PN junction, the holes in the P-type semiconductor move from the hot end to the cold end, and the electrons in the N-type semiconductor move from the hot end to the cold end, thereby forming an electric current. In this way, the thermoelectric material can convert the heat energy input from the hot end into electrical energy. The automobile exhaust temperature difference power generation device is generally installed between the three-way catalytic converter and the muffler. At present, most research focuses on the independent design and development of exhaust catalysis, exhaust power generation, and exhaust muffler, and is relatively mature.

[0004] Exhaust silencer can enlarge the opening area of ​​the exhaust outlet to form an expansion ratio at the outlet when the exhaust is discharged, thereby reducing the output of noise; the heat exchange chamber at the hot end of the exhaust generator needs to transfer enough heat to the temperature difference generator, so the internal design is generally more compact to capture more heat, which increases the difficulty of integrating the exhaust silencer with the exhaust power generation equipment. Therefore, traditional automobile exhaust treatment modules assemble the two separately, which takes up a lot of space and is not conducive to the lightweight of the automobile. Summary of the invention

[0005] Purpose of the invention: In view of the deficiencies in the prior art, the present invention provides a multi-stage temperature difference power generation device with integrated exhaust gas silencing function. The device adopts a multi-stage structure and integrates the silencing structure inside the heat exchanger of the temperature difference generator, so that the heat exchanger has the function of heat exchange and power generation while also having the function of exhaust gas silencing, thereby reducing the occupied space and facilitating the lightweighting of the vehicle.

[0006] Technical solution: A multi-stage temperature difference power generation device with integrated exhaust gas silencing function, including a hot end heat exchanger, an intake pipe and an exhaust pipe respectively installed at both ends of the hot end heat exchanger, the outer surface of the hot end heat exchanger is connected to the cold end radiator through a temperature difference power generation module, the hot end heat exchanger is provided with flat fins parallel to the air intake direction, the hot end heat exchanger is provided with a diverter plate perpendicular to the air intake direction, the diverter plate is provided with diverter holes, and the diverter plate is provided with a silencer whose cross section gradually expands along the air intake direction.

[0007] The present invention divides the hot-end heat exchanger into two spaces by arranging a diverter plate inside the hot-end heat exchanger, thereby providing a suitable space for installing a silencer, and further divides the space into a silencer chamber and a heat exchange chamber by utilizing the structure of the silencer, so that the hot-end heat exchanger can not only ensure the original heat exchange and power generation function, but also have the exhaust gas silencer effect, thereby realizing the integration of the hot-end heat exchanger and the silencer and reducing the occupied space.

[0008] Preferably, in order to effectively integrate the heat exchange power generation and silencer functions, the diverter plate divides the interior of the heat exchanger into a high-temperature heat exchange chamber and a low-temperature heat exchange chamber, the flat fins are evenly installed on the inner wall of the high-temperature heat exchange chamber, and the silencer is installed in the low-temperature heat exchange chamber.

[0009] The temperature of the exhaust gas is relatively high when it enters the hot end heat exchanger, so a number of evenly distributed flat fins are arranged near the exhaust gas input end to enhance the heat capture efficiency, thereby improving the heat exchange power generation efficiency; the silencer is installed in the low-temperature section heat exchange chamber, which can silence the exhaust gas after heat exchange in the high-temperature section heat exchange chamber to reduce noise output.

[0010] Preferably, in order to achieve the initial stage of suppressing the noise in the exhaust gas, the outer surface of the flat fin is provided with evenly distributed silencer grooves.

[0011] By providing a plurality of mutually staggered and evenly distributed silencer grooves on the flat plate fins, the flat plate fins not only have the function of heat conduction but also have the function of silencing high-frequency noise, so that the exhaust gas can be silenced while undergoing initial heat exchange.

[0012] Preferably, in order to achieve secondary noise suppression of exhaust gas, a sound-absorbing cotton which is in close contact with the inner wall of the low-temperature section heat exchange chamber on the side close to the exhaust pipe is also provided.

[0013] After being diverted by the splitter plate, the exhaust gas will flow toward the inner wall of the hot end heat exchanger due to the structure of the silencer. Silence cotton is arranged on the inner wall close to the exhaust pipe side, so that the exhaust gas flows through the silencer cotton after heat exchange in the low-temperature section heat exchanger, thereby achieving silencing treatment of the exhaust gas that has not passed through the silencer.

[0014] Preferably, in order to be able to evenly guide the exhaust gas into the low-temperature section heat exchange chamber for sufficient heat exchange and further noise suppression, the silencer is installed in the middle of the diverter plate, and the silencer divides the low-temperature section heat exchange chamber into an upper temperature difference power generation chamber, a middle silencer chamber and a lower temperature difference power generation chamber.

[0015] The silencer is installed in the middle of the diverter plate to achieve uniform diversion of the exhaust gas, so that each heat exchange and power generation surface in the low-temperature section heat exchange chamber can be heated evenly to produce a temperature difference, thus avoiding the problem of uneven heating leading to reduced working efficiency of the temperature difference power generation sheet.

[0016] Preferably, in order to achieve more efficient heat exchange power generation, the temperature difference power generation module includes high-temperature temperature difference power generation sheets connected in series and low-temperature temperature difference power generation sheets connected in series, the high-temperature temperature difference power generation sheets are installed on the outer surface of the high-temperature section heat exchange chamber, and the low-temperature temperature difference power generation sheets are installed on the outer surface of the low-temperature section heat exchange chamber.

[0017] Different thermoelectric power generation sheets are used to correspond to different heat exchange sections. High-temperature thermoelectric power generation sheets correspond to high-temperature heat exchange chambers, and low-temperature thermoelectric power generation sheets correspond to low-temperature heat exchange chambers. This enables different sections to have more efficient heat exchange and power generation capabilities, further improving the power generation capacity of the thermoelectric power generation module.

[0018] Preferably, in order to further improve the thermal conductivity efficiency, a ceramic sheet is provided between the temperature difference power generation module and the outer surface of the hot end heat exchanger.

[0019] Installing ceramic sheets can enhance the efficiency of heat conduction and further improve the heat exchange efficiency of the hot-end heat exchanger and the cold-end heat exchanger.

[0020] Preferably, in order to improve the cooling effect of the cold-end radiator, a water inlet manifold and a water outlet manifold are respectively provided at both ends of the cold-end radiator.

[0021] By setting up water inlet and outlet manifolds and utilizing circulating water to achieve continuous cooling of the cold-end radiator, the cooling effect of the cold-end radiator is improved, further improving the power generation efficiency of the temperature difference power generation module.

[0022] Preferably, in order to make the exhaust gas discharge more unobstructed, one end of the exhaust pipe is arranged in the low-temperature section heat exchange chamber, and the other end is arranged outside the hot end heat exchanger. The front section of the exhaust pipe arranged in the low-temperature section heat exchange chamber has a gradually narrowing structure along the air intake direction, and air holes are opened on the pipe wall.

[0023] The front end of the exhaust pipe is set to a gradually narrowing structure to increase the air output, make the exhaust gas discharge more smoothly, and reduce the back pressure; the vent holes are opened on the pipe wall to facilitate the outflow of gas that flows through the silencer cotton for secondary silencing, avoiding the problem of gas reflux causing exhaust gas emission problems.

[0024] Preferably, in order to enable sufficient heat exchange to be performed on the exhaust gas when it enters the hot-end heat exchange chamber, a spoiler device which gradually expands toward the inner wall of the hot-end heat exchanger is installed at the air inlet of the hot-end heat exchanger.

[0025] The spoiler device is arranged at the inlet to make the high-temperature exhaust gas flow evenly into the high-temperature section heat exchange chamber to fully exchange heat with the flat fins, thereby improving the heat exchange efficiency.

[0026] Beneficial effects: The present invention divides the hot-end heat exchanger into two spaces by setting a diverter plate, thereby providing sufficient installation space for the silencer device; at the same time, a plurality of silencer grooves are arranged on the flat fins in the high-temperature section heat exchange chamber, and the exhaust gas entering the hot-end heat exchanger is silenced in the first stage, which has a good suppressing effect on the noise in the medium and high frequency bands; the silencer device installed on the diverter plate performs the second stage of silencer on the exhaust gas, which has a good suppressing effect on the medium and low frequency noise; at the same time, due to the special structure of the silencer device, the exhaust gas passing through the diverter plate is diverted, and the heat of the exhaust gas can be raised to the surface of the heat exchanger, which has a good temperature difference power generation effect; the silencer cotton is arranged to perform the second stage of silencer on the exhaust gas after the diversion and the heat exchange with the inner wall of the hot-end heat exchanger, which can reduce the medium and high frequency noise again, and further improve the silencer effect.

[0027] In order to further improve the efficiency of heat exchange power generation, the temperature difference power generation module is divided into low-temperature temperature difference power generation sheets and high-temperature temperature difference power generation sheets, and the heat exchange chambers corresponding to different temperature sections can perform heat exchange power generation more efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 It is a stereoscopic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a front cross-sectional view of the present invention.

[0031] Figure 3 It is a top cross-sectional view of the present invention.

[0032] Figure 4 It is a partition diagram of the present invention.

[0033] Figure 5 It is a schematic diagram of the structure of the diverter plate of the present invention.

[0034] Figure 6It is a schematic diagram of the structure of the diverter plate and the silencer device of the present invention.

[0035] Figure 7 This is a structural diagram of the cold section radiator of the present invention.

[0036] Figure 8 It is a structural diagram of the exhaust pipe of the present invention. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] like Figure 1As shown, a multi-stage temperature difference power generation device with integrated exhaust gas silencing function comprises a hot end heat exchanger 1, an intake pipe 2 and an exhaust pipe 3 respectively installed at both ends of the hot end heat exchanger 1, the outer surface of the hot end heat exchanger 1 is connected to the cold end radiator 5 through a temperature difference power generation module 4, and the cold end radiator 5 is provided with an inlet manifold 51 and a drain manifold 52; the hot end heat exchanger 1 is provided with a flat plate fin 6 parallel to the air intake direction, and the outer surface of the flat plate fin 6 is provided with uniformly distributed silencing grooves 61; the hot end heat exchanger 1 is provided with a diverter plate 7 perpendicular to the air intake direction, the diverter plate 7 is provided with a diverter hole 8, and the diverter plate 7 is provided with a silencing device 9 with a cross section gradually expanding along the air intake direction. The diverter plate 7 divides the interior of the heat exchanger into a high temperature section heat exchange chamber 11 and a low temperature section heat exchange chamber 12, the flat plate fin 6 is evenly installed on the inner wall of the high temperature section heat exchange chamber 11, and the silencing device 9 is installed in the low temperature section heat exchange chamber 12.

[0041] By arranging a diverter plate 7 inside the hot end heat exchanger 1, the hot end heat exchanger 1 is divided into two spaces, providing a suitable space for installing the silencer 9, and the structure of the silencer 9 is used to divide the space into a silencer chamber 122, an upper heat exchange chamber 121 and a lower heat exchange chamber 123, so that the hot end heat exchanger 1 can not only ensure the original heat exchange and power generation function, but also have the exhaust gas silencer effect, realizing the integration of the hot end heat exchanger 1 and the silencer 9, and reducing the occupied space; by arranging a water inlet manifold 51 and a water outlet manifold 52, the continuous cooling function of the cold end radiator 5 is realized by using flowing water, the cooling effect of the cold end radiator 5 is improved, and the power generation efficiency of the temperature difference power generation module 4 is further improved; by providing a plurality of mutually staggered and evenly distributed silencer grooves 61 on the flat plate fin 6, the flat plate fin 6 not only has the function of heat conduction but also has the function of silencing high-frequency noise, so that the exhaust gas is silenced while undergoing initial heat exchange.

[0042] The inner wall of the low temperature section heat exchange chamber 12 close to the exhaust pipe 3 is also provided with a sound-absorbing cotton 13 which is in close contact with the inner wall.

[0043] After being diverted by the diverter plate 7, the exhaust gas will flow toward the inner wall of the hot end heat exchanger 1 due to the structure of the silencer 9. A silencer cotton 13 is arranged on the inner wall close to the exhaust pipe 3, so that the exhaust gas flows through the silencer cotton 13 after heat exchange in the low-temperature section heat exchange chamber 12, thereby achieving silencer treatment of the exhaust gas that has not passed through the silencer 9.

[0044] like Figures 2 to 3As shown, in this embodiment, the silencer 9 is a plate-shaped silencer fin with symmetrical upper and lower structures, and its main function is to lift the exhaust gas output from the high-temperature section heat exchange chamber 11 toward the inner wall, thereby improving the heat exchange efficiency; the silencer 9 is installed in the middle of the diverter plate 7, and the silencer 9 divides the low-temperature section heat exchange chamber 12 into an upper temperature difference power generation chamber 121, a middle silencer chamber 122 and a lower temperature difference power generation chamber 123.

[0045] The silencer 9 is installed in the middle of the diverter plate 7 to achieve uniform diversion of the exhaust gas, so that each heat exchange and power generation surface of the low-temperature heat exchange chamber 12 can be heated evenly to produce a temperature difference, avoiding the problem of uneven heating leading to reduced working efficiency of the temperature difference power generation sheet.

[0046] The angle between the silencer fin and the diverter plate 7 is angle α. Since the displacement of various types of automobiles is different, the most suitable value of angle α can be calculated according to the displacement. Silencers 9 with different angles are designed for automobiles with different displacements, thereby achieving the best silencer effect and temperature difference power generation efficiency.

[0047] The temperature difference power generation module 4 includes a high-temperature temperature difference power generation sheet 41 connected in series and a low-temperature temperature difference power generation sheet 42 connected in series. The high-temperature temperature difference power generation sheet 41 is installed on the outer surface of the high-temperature section heat exchange chamber 11, and the low-temperature temperature difference power generation sheet 42 is installed on the outer surface of the low-temperature section heat exchange chamber 12; a ceramic sheet 14 is arranged between the temperature difference power generation module 4 and the outer surface of the hot end heat exchanger 1.

[0048] Different thermoelectric power generation sheets are used to correspond to different heat exchange sections, so that the high-temperature thermoelectric power generation sheet 41 corresponds to the high-temperature section heat exchange chamber 11, and the low-temperature thermoelectric power generation sheet 42 corresponds to the low-temperature section heat exchange chamber 12, so that different sections have more efficient heat exchange and power generation capabilities, further improving the power generation capacity of the thermoelectric power generation module 4. The ceramic sheet 14 is installed to enhance the efficiency of heat conduction, further improving the heat exchange efficiency of the hot end heat exchanger 1 and the cold end radiator 5.

[0049] One end of the exhaust pipe 3 is arranged in the low-temperature section heat exchange chamber 12, and the other end is arranged outside the hot end heat exchanger 1. The front section of the exhaust pipe 3 arranged in the low-temperature section heat exchange chamber 12 is gradually reduced along the air intake direction, and a vent hole 31 is opened on the pipe wall.

[0050] The front end of the exhaust pipe 3 is set to a gradually narrowing structure to increase the air output, make the exhaust gas discharge more smoothly, and reduce the back pressure; the vent hole 31 is opened on the pipe wall to facilitate the outflow of gas that flows through the silencer cotton 13 for secondary silencing, avoiding the problem of gas reflux causing exhaust gas discharge problems.

[0051] A spoiler 15 whose cross-sectional area gradually expands along the air inlet direction is installed at the air inlet position of the hot end heat exchanger 1.

[0052] The spoiler 15 is arranged at the inlet so that the high-temperature exhaust gas can flow evenly into the high-temperature section heat exchange chamber 11 to fully exchange heat with the flat fins 6, thereby improving the heat exchange efficiency.

[0053] The spoiler 15 is as follows Figure 1 and 2 As shown, the structure is plate-shaped, but in actual application it is not limited to plate-shaped spoilers, and can also be any structure with a trumpet-shaped cross-section that gradually expands along the air intake direction.

[0054] In another embodiment, the silencer 9 can also be changed according to the arrangement position of the temperature difference power generation module 4. For example, the present invention can change the external shape such as a cylinder according to different needs. When it is designed as a cylinder, the temperature difference power generation module 4 is evenly distributed on the outer surface of the cylinder. The silencer 9 can be designed as a trumpet-shaped structure, and the diverter plate 7 is set to a circular ring with a fixed structure, which not only has the function of achieving silence through the expansion ratio but also achieves the lifting effect on the exhaust gas. The above-mentioned angle α is also applicable to the technical solution of this embodiment.

[0055] 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.

[0056] 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. A multi-stage temperature difference power generation device with integrated exhaust gas silencing function, comprising a hot end heat exchanger (1), an air intake pipe (2) and an exhaust pipe (3) respectively installed at both ends of the hot end heat exchanger (1), the outer surface of the hot end heat exchanger (1) is connected to a cold end radiator (5) via a temperature difference power generation module (4), and a flat plate fin (6) parallel to the air intake direction is arranged inside the hot end heat exchanger (1), characterized in that: The hot end heat exchanger (1) is provided with a flow divider (7) perpendicular to the air intake direction, the flow divider (7) is provided with a flow divider hole (8), and the flow divider (7) is provided with a silencer (9) whose cross section gradually expands along the air intake direction; the flow divider (7) divides the interior of the heat exchanger into a high-temperature heat exchange chamber (11) and a low-temperature heat exchange chamber (12); the flat plate fins (6) are evenly installed on the inner wall of the high-temperature heat exchange chamber (11), and the silencer (9) is installed in the low-temperature heat exchange chamber (12); the outer surface of the flat plate fins (6) is provided with evenly distributed silencer grooves (61); and a spoiler (15) whose cross section gradually expands along the air intake direction is installed at the air intake position of the hot end heat exchanger (1).

2. The multi-stage temperature difference power generation device with integrated exhaust gas silencing function according to claim 1, characterized in that: A sound-absorbing cotton (13) which is in close contact with the inner wall of the low-temperature section heat exchange chamber (12) on the side close to the exhaust pipe (3) is also provided.

3. The multi-stage temperature difference power generation device with integrated exhaust gas silencing function according to claim 1, characterized in that: The silencer (9) is installed in the middle of the diverter plate (7), and the silencer (9) divides the low-temperature section heat exchange chamber (12) into an upper temperature difference power generation chamber (121), a middle silencer chamber (122), and a lower temperature difference power generation chamber (123).

4. The multi-stage temperature difference power generation device with integrated exhaust gas silencing function according to claim 1, characterized in that: The temperature difference power generation module (4) comprises high-temperature temperature difference power generation sheets (41) connected in series with each other and low-temperature temperature difference power generation sheets (42) connected in series with each other, the high-temperature temperature difference power generation sheets (41) being mounted on the outer surface of a high-temperature section heat exchange chamber (11), and the low-temperature temperature difference power generation sheets (42) being mounted on the outer surface of a low-temperature section heat exchange chamber (12).

5. The multi-stage temperature difference power generation device with integrated exhaust gas silencing function according to claim 4 is characterized in that: A ceramic sheet (14) is provided between the temperature difference power generation module (4) and the outer surface of the hot end heat exchanger (1).

6. The multi-stage temperature difference power generation device with integrated exhaust gas silencing function according to claim 1 is characterized in that: The cold end radiator (5) is provided with a water inlet manifold (51) and a water outlet manifold (52).

7. The multi-stage temperature difference power generation device with integrated exhaust gas silencing function according to claim 1 is characterized in that: One end of the exhaust pipe (3) is arranged in the low-temperature section heat exchange chamber (12), and the other end is arranged outside the hot end heat exchanger (1); the front section of the exhaust pipe (3) arranged in the low-temperature section heat exchange chamber (12) is gradually reduced in size along the air intake direction, and a vent hole (31) is provided on the pipe wall.

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