Separating device, exhaust gas recirculation system and vehicle

Abstract

The utility model relates to a separation device, an exhaust gas recirculation system and a vehicle, and the separation device comprises a separation part which is suitable for water-gas separation; wherein a heat absorbing material is arranged in the separating piece. According to the technical scheme, the separation efficiency of condensate water is improved.

Description

Technical Field

[0001] This application relates to the field of separation device technology, and more particularly to a separation device, an exhaust gas recirculation system, and a vehicle. Background Technology

[0002] Currently, Exhaust Gas Recycling (EGR) is a technology that reintroduces a portion of the engine's exhaust gases into the cylinders to participate in the combustion process. This technology can significantly reduce the NOx content in engine exhaust and lower fuel consumption, and its application in gasoline engines is becoming increasingly widespread.

[0003] However, the large amount of moisture and other harmful substances carried in the exhaust gas can form acidic condensate under certain conditions. This condensate can cause some damage to engine components along the way, thereby reducing the stability of the engine during operation. Utility Model Content

[0004] This application provides a separation device that improves the separation efficiency of condensate, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a separation device is provided, comprising: a separation element adapted to perform water-gas separation; wherein the separation element is provided with a heat-absorbing material.

[0006] Optionally, the heat-absorbing material is located inside the sidewall of the separator.

[0007] Optionally, the separator may further include a flow guide that extends axially along the separator and is used to cause the exhaust gas to flow in a spiral pattern.

[0008] Optionally, the guide section is a spiral structure that extends along the axial direction of the separator.

[0009] Optionally, the heat-absorbing material is located inside the sidewall of the spiral structure.

[0010] Optionally, the heat-absorbing material includes paraffin wax.

[0011] Optionally, the separation device also includes a housing adapted to allow the flow of exhaust gas and outside air.

[0012] The shell has a first receiving cavity, and the two ends of the shell are respectively provided with a first inlet and a first outlet that are connected to the first receiving cavity.

[0013] The separator is disposed in the first receiving cavity. The separator has a second receiving cavity and a first air inlet and a first air outlet communicating with the second receiving cavity. The first air inlet is connected to the first inlet, and the first air outlet is connected to the first outlet.

[0014] The side wall of the separator is provided with a second air inlet that communicates with the second receiving cavity. The first air inlet is used to draw in air, the first outlet is used to discharge the gas after the exhaust gas and air are mixed, and the second air inlet is used to guide the exhaust gas into the second receiving cavity.

[0015] Optionally, an air intake structure is provided on the side wall of the housing. One end of the air intake structure is connected to the second air inlet, and the other end of the air intake structure is used to connect to the exhaust gas source to guide the exhaust gas into the second accommodating cavity.

[0016] Optionally, a second inlet is provided at the other end of the air intake structure, which is used to connect with the exhaust gas source.

[0017] Optionally, the second receiving cavity is provided with a flow channel for collecting condensate formed after the exhaust gas mixes with cold air.

[0018] Optionally, the separation device also includes a collection element, one end of which has a water inlet connected to a flow channel to allow condensate to flow into the collection element.

[0019] Optionally, the second air inlet is used to allow exhaust gas to flow into the second receiving cavity along the tangential direction of the separator.

[0020] Optionally, the separator may be made of aluminum.

[0021] Optionally, the cross-section of the separator in the radial direction is annular.

[0022] According to a second aspect of this application, an exhaust gas recirculation system is provided, the exhaust gas recirculation system including the separation device described above.

[0023] According to a third aspect of this application, a vehicle is also provided, including the exhaust gas recirculation system described above.

[0024] The separation device in this application includes a separation element adapted for separating water and gas; wherein the separation element contains a heat-absorbing material. By utilizing the heat-absorbing material to separate condensate droplets contained in the exhaust gas flow, the separation of condensate can be effectively achieved, thereby preventing the condensate generated by the exhaust gas from causing damage to engine components along the path.

[0025] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0028] Figure 1 This is a schematic diagram of the overall structure of the separation device provided in an exemplary embodiment of this disclosure;

[0029] Figure 2 This is a front view of the separation device provided in an exemplary embodiment of this disclosure;

[0030] Figure 3 yes Figure 2 Schematic diagram of the cross section at point AA;

[0031] Figure 4 This is a side view of the separation device provided in an exemplary embodiment of this disclosure;

[0032] Figure 5 This is a cross-sectional schematic diagram of the separation device provided in an exemplary embodiment of this disclosure.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Separation device; 10. Shell; 11. First receiving cavity; 12. First inlet; 13. Second inlet; 14. First outlet; 15. Air intake structure; 20. Separation component; 21. First air inlet; 22. First air outlet; 23. Second receiving cavity; 24. Second air inlet; 25. Flow channel; 30. Collector; 31. Water inlet; 40. Flow guide; 50. Heat-absorbing material. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0036] like Figures 1 to 5 As shown, according to a first aspect of this application, a separation device 1 is provided, comprising: a separation element 20 adapted to perform water-gas separation; wherein, the separation element 20 is provided with a heat-absorbing material 50.

[0037] By using the above technical solution, the heat-absorbing material 50 is used to separate the condensate droplets contained in the exhaust gas flow, which can effectively separate the condensate and thus avoid damage to the engine components along the way caused by the condensate generated by the exhaust gas.

[0038] Optionally, the separation device 1 includes a housing 10, which is suitable for the inflow of exhaust gas and outside air. The housing 10 has a first receiving cavity 11, and the two ends of the housing 10 are respectively provided with a first inlet 12 and a first outlet 14 communicating with the first receiving cavity 11. This allows cold air to enter through the first air inlet 21, and the gas after the exhaust gas and air are mixed is discharged from the first outlet 14, so as to meet the normal operation of the device.

[0039] Optionally, the separator 20 is disposed within the first receiving cavity 11. The separator 20 has a second receiving cavity 23 and a first air inlet 21 and a first air outlet 22 communicating with the second receiving cavity 23. The first air inlet 21 is connected to the first inlet 12, and the first air outlet 22 is connected to the first outlet 14. This configuration allows for the separation of condensate using the separator 20, thereby preventing condensate generated from exhaust gas from causing damage to engine components along the path.

[0040] Optionally, the side wall of the separator 20 is provided with a second air inlet 24 communicating with the second receiving cavity 23. The first air inlet 21 is used to draw in air, the first outlet 14 is used to discharge the gas mixture of exhaust gas and air, and the second air inlet 24 is used to guide the exhaust gas into the second receiving cavity 23. In this way, the separator 20 is provided in the housing 10. Cold air enters through the first air inlet 21 and flows through the separator 20. At the same time, exhaust gas is drawn into the first receiving cavity 11 through the second inlet 13. Since the temperature of the exhaust gas is higher than that of the cold air, condensate droplets will be generated. The condensate droplets contained in the exhaust gas flow can be separated under the action of gravity. This can effectively achieve the separation of condensate, thereby avoiding damage to the engine components along the path caused by the condensate generated by the exhaust gas.

[0041] Optionally, an air intake structure 15 is provided on the side wall of the housing 10. One end of the air intake structure 15 is connected to the second air inlet 24, and the other end of the air intake structure 15 is used to connect to the exhaust gas source to guide the exhaust gas into the second receiving cavity 23. This can improve the intake efficiency of the exhaust gas to meet the condensation requirements of the exhaust gas.

[0042] Optionally, the other end of the intake structure 15 is provided with a second inlet 13, which is used to connect with the exhaust gas source. This configuration can improve the intake efficiency of the exhaust gas to meet the condensation requirements of the exhaust gas.

[0043] Optionally, the separator 20 further includes a guide section 40, which is disposed within the second receiving cavity 23 and extends axially along the separator 20. The guide section 40 is used to cause the exhaust gas to flow in a spiral pattern. The guide section 40 causes the exhaust gas to flow in a spiral shape within the separator 20, extending the contact time and contact area between the exhaust gas and the condenser wall. This flow pattern increases the opportunity for heat exchange, allowing the heat in the exhaust gas to be transferred more fully to the condenser wall, thereby improving the condensation efficiency. At the same time, the spiral flow helps to distribute the exhaust gas evenly within the separator 20, avoiding local overheating or insufficient condensation. This even distribution makes the condensation process more stable and efficient.

[0044] Furthermore, the design of the flow guide 40 optimizes the flow path of the exhaust gas, reducing pressure loss of the fluid within the separator 20. This helps reduce system energy consumption and operating costs. The spiral flow helps stabilize the flow state of the exhaust gas, reducing adverse factors such as turbulence and eddies. This stability is crucial for ensuring the smooth operation of the condensation process. The flow guide 40 acts as a support within the separator 20, helping to enhance the overall structural strength of the separator 20. This support makes the separator 20 more stable and reliable under harsh conditions such as high pressure and high temperature. The flow guide 40 is typically made of wear-resistant materials, enabling it to maintain good working condition during long-term operation. This wear resistance extends the service life of the separator 20 and reduces maintenance costs.

[0045] In this application, the material of the guide portion 40 may be a metallic material or a non-metallic material.

[0046] Optionally, the guide section 40 has a spiral structure extending axially along the separator 20. The spiral structure extends the flow path of the exhaust gas within the separator 20, thereby increasing the contact time between the exhaust gas and the condenser wall. This helps to transfer heat more fully and improve condensation efficiency. The spiral guide section 40 can guide the exhaust gas to form a complex flow pattern within the separator 20, increasing the contact area between the exhaust gas and the condenser wall. This increase helps to improve heat exchange efficiency, allowing more heat to be effectively transferred. The spiral guide section 40 can change the flow pattern of the exhaust gas, making it more stable and orderly. This helps to reduce adverse factors such as turbulence and eddies, reduce fluid resistance, and improve fluid dynamics performance. The spiral structure can guide the exhaust gas to be evenly distributed within the separator 20, thereby improving the uniformity of pressure distribution. This uniformity helps to reduce local overheating or insufficient condensation, improving the stability and efficiency of the condensation process.

[0047] Furthermore, the spiral-structured guide section 40 provides support within the separator 20, enhancing its overall structural strength. This enhancement makes the separator 20 more stable and reliable under harsh conditions such as high pressure and high temperature. The spiral-structured guide section 40 guides the exhaust gas to form a continuous spiral flow within the separator 20, which helps increase system stability. Even when flow rate or pressure changes, the spiral structure maintains a stable flow state, ensuring the smooth progress of the condensation process. The spiral-structured guide section 40 can be adjusted and optimized according to different operating conditions. For example, by changing parameters such as the spiral diameter and pitch, the flow velocity and pressure distribution of the exhaust gas can be adjusted to adapt to different working environments and conditions. The spiral-structured guide section 40 is designed for easy maintenance and cleaning. When needed, the guide section 40 can be easily disassembled and replaced to ensure the continuous and efficient operation of the separator 20. At the same time, the spiral structure also helps reduce the accumulation of dirt and impurities, lowering maintenance costs.

[0048] Optionally, a heat-absorbing material 50 is also provided within the separator 20, located within the sidewall of the spiral structure. The heat-absorbing material 50 possesses the characteristic of undergoing a phase change at a specific temperature and absorbing or releasing a large amount of latent heat. During condensation, when the exhaust gas temperature drops to the phase change temperature of the heat-absorbing material 50, the material absorbs heat from the exhaust gas, thereby achieving efficient heat transfer. The heat-absorbing material 50 on the inner wall of the spiral structure increases the heat capacity of the condensation wall, making the condensation process more stable and efficient. The heat absorption effect of the heat-absorbing material 50 helps to reduce the exhaust gas temperature, accelerate the condensation process, and improve condensation efficiency. The heat-absorbing material 50 can absorb or release heat during the phase change process, thereby mitigating temperature fluctuations. This helps maintain temperature stability within the separator 20, ensuring the smooth progress of the condensation process.

[0049] Optionally, the heat-absorbing material 50 includes paraffin wax. As the heat-absorbing material 50, paraffin wax possesses a high latent heat of phase change, enabling it to absorb or release a large amount of latent heat during solid-liquid phase transitions. This allows paraffin wax to effectively store and release heat energy within the separator 20, improving the system's energy efficiency. The phase transition process of paraffin wax is essentially isothermal, allowing for heat absorption and release within a specific temperature range. This stable temperature control helps maintain temperature stability within the separator 20, ensuring a smooth condensation process. As a natural inorganic material, paraffin wax contains no harmful chemicals, generates no waste during use, and has minimal negative environmental impact. Furthermore, it does not corrode the inner wall of the separator 20, extending the equipment's service life. The chemical stability of paraffin wax, preventing corrosion and oxidation, reduces the inconvenience of frequent replacements. This results in a longer service life for paraffin wax in the separator 20, reducing maintenance costs.

[0050] Optionally, the second receiving cavity 23 is provided with a flow channel 25 for collecting condensate formed after the exhaust gas mixes with cold air. The design of the flow channel 25 effectively collects condensate, preventing its accumulation within the receiving cavity and thus avoiding impacts on the system's normal operation. Timely drainage of condensate reduces residual moisture within the system, mitigating the risk of increased energy consumption and decreased efficiency due to moisture accumulation. Simultaneously, maintaining a dry system helps extend equipment lifespan, as condensate accumulation can adversely affect system stability. Collecting condensate through the flow channel 25 significantly reduces the risk of system failures caused by moisture accumulation. This design enhances system stability and reliability, ensuring normal equipment operation under various conditions.

[0051] The flow channel 25 not only collects condensate but also guides and controls fluid flow. By rationally designing the shape and position of the flow channel 25, the mixing effect of exhaust gas and cold air can be optimized, improving condensation efficiency. Simultaneously, the flow channel 25 can also help regulate fluid velocity and pressure distribution, further enhancing the overall performance of the system.

[0052] Optionally, the separation device 1 also includes a collection element 30, one end of which has an inlet 31 connected to the flow channel 25 to allow condensate to flow into the collection element 30. This ensures that the condensate flows smoothly and unobstructed into the collection element 30. This design avoids the accumulation and retention of condensate in the flow channel 25, improving collection efficiency. Simultaneously, the tight and reliable connection between the inlet 31 and the flow channel 25 effectively prevents condensate leakage and overflow, which helps maintain the cleanliness and dryness of the system and reduces the risk of malfunctions due to moisture accumulation. The collection element 30 collects the condensate for subsequent unified treatment. This helps reduce treatment costs and improve treatment efficiency. The collection element 30 allows for convenient monitoring of the amount and quality of condensate generated. This is important for evaluating system performance, adjusting operating parameters, and promptly identifying potential problems.

[0053] Furthermore, timely collection and drainage of condensate helps reduce residual moisture within the system, thereby lowering the risk of malfunctions caused by moisture accumulation. This contributes to improved system stability and reliability. Effective collection and treatment of condensate can reduce corrosion and damage to system equipment, thus extending equipment lifespan. Condensate may contain harmful substances. Timely collection and drainage of condensate prevents it from seeping into the soil or water sources, thus avoiding damage to the ecological environment.

[0054] Optionally, the separator 20 is made of aluminum. In this application, the separator 20 is a ring structure. Aluminum has excellent thermal conductivity, typically above 200 W / m·K, enabling efficient heat transfer. Simultaneously, aluminum is lightweight and has low density, while its high thermal conductivity provides both excellent thermal performance and high strength and toughness. This allows the ring structure to withstand pressure and stress while reducing weight, meeting the needs of various applications. Furthermore, a dense oxide film easily forms on the surface of the high thermal conductivity aluminum, providing excellent corrosion resistance and protecting the material from various corrosive media. Therefore, the aluminum ring plate maintains stable heat transfer performance even in harsh environments, extending its service life.

[0055] Furthermore, aluminum, with its high thermal conductivity, possesses excellent processing properties and can be manufactured into ring plates of various shapes and specifications through casting, rolling, extrusion, and other methods. This flexibility allows aluminum ring plates to adapt to different application scenarios and heat dissipation requirements.

[0056] Optionally, the radial cross-section of the separator 20 is annular. The above structure is simple and easy to manufacture, thereby reducing the production cost of the device.

[0057] Optionally, the second air inlet 24 is used to allow exhaust gas to flow tangentially into the second receiving cavity 23 along the separator 20. The rotational motion generated by the tangential air intake uses centrifugal force to separate condensate from the exhaust gas flow. Under the action of centrifugal force, the condensate is thrown against the inner wall of the second receiving cavity and flows along the flow channel 25 to the collecting element 30.

[0058] According to a second aspect of this application, an exhaust gas recirculation system is provided, the exhaust gas recirculation system including the separation device 1 described above.

[0059] According to a third aspect of this application, a vehicle is also provided, including the exhaust gas recirculation system described above.

[0060] The separation device 1 in this embodiment includes: a housing 10 having a first receiving cavity 11, with a first inlet 12, a second inlet 13, and a first outlet 14 respectively at both ends of the housing 10 and communicating with the first receiving cavity 11; the second inlet 13 is provided on the outer wall of the separation member 20 for drawing in exhaust gas; the separation member 20 is provided in the first receiving cavity 11, and the separation member 20 has a first air inlet 21 and a first air outlet 22; the first air inlet 21 is connected to the first inlet 12, and the first air outlet 22 is connected to the first outlet 14; the first air inlet 21 is used to draw in cold air, and the first outlet 14 is used to discharge the gas after the exhaust gas and cold air are mixed; wherein, the cross-section of the separation member 20 in the radial direction is annular. Through the above technical solution, a separator 20 is provided inside the housing 10. Cold air enters through the first air inlet 21 and flows through the separator 20. Simultaneously, exhaust gas is drawn into the first receiving cavity 11 from the second inlet 13. Since the temperature of the exhaust gas is higher than that of the cold air, condensate droplets are generated. The condensate droplets contained in the exhaust gas flow can be separated under the action of gravity, thus effectively achieving the separation of condensate and preventing the condensate generated by the exhaust gas from causing certain damage to the engine components along the path. It should be noted that the terminology used herein is only for describing particular embodiments and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0062] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0063] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0064] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A separating device, characterized in that The separation device comprises: a separation piece adapted to separate water vapor from exhaust gas; wherein the separation piece is provided with heat-absorbing material.

2. The separation device of claim 1, wherein, The heat-absorbing material is located in the side wall of the separation piece.

3. The separation device of claim 2, wherein, The separation piece further comprises a flow guide portion extending along the axial direction of the separation piece, and the flow guide portion is used to make the exhaust gas flow spirally.

4. The separation device of claim 3, wherein, The flow guide portion is a spiral structure extending along the axial direction of the separation piece.

5. The separation device of claim 4, wherein, The heat-absorbing material is located in the side wall of the spiral structure.

6. The separation device of claim 1, wherein, The heat-absorbing material comprises paraffin wax.

7. The separation device of claim 1, wherein, The separation device further comprises a housing adapted to flow into exhaust gas and external air.

8. The separation device of claim 7, wherein, The housing has a first accommodating cavity, and the housing is provided with a first inlet and a first outlet respectively communicating with the first accommodating cavity at two ends thereof.

9. The separation device of claim 8, wherein, The separation piece is arranged in the first accommodating cavity, and the separation piece has a second accommodating cavity and a first gas inlet and a first gas outlet communicating with the second accommodating cavity, the first gas inlet communicates with the first inlet, and the first gas outlet communicates with the first outlet.

10. The separation device of claim 9, wherein, The side wall of the separation piece is provided with a second gas inlet communicating with the second accommodating cavity, the first gas inlet is used to suck in air, the first outlet is used to discharge exhaust gas mixed with air, and the second gas inlet is used to guide exhaust gas into the second accommodating cavity.

11. The separation device of claim 10, wherein, The side wall of the housing is provided with a gas inlet structure, one end of the gas inlet structure communicates with the second gas inlet, and the other end of the gas inlet structure is used to communicate with an exhaust gas source to guide the exhaust gas into the second accommodating cavity.

12. The separation device of claim 11, wherein, The other end of the gas inlet structure is provided with a second inlet, and the second inlet is used to communicate with the exhaust gas source.

13. The separation device of claim 9, wherein, The second accommodating cavity is provided with a flow channel groove for collecting condensed water.

14. The separation device of claim 13, wherein, The separation device further comprises a collection piece, one end of the collection piece has a water inlet, and the water inlet communicates with the flow channel groove to make the condensed water flow into the collection piece.

15. The separation device of claim 1, wherein, The separation piece is made of aluminum material.

16. The separation device of claim 1, wherein, The cross section of the separation piece in the radial direction is annular.

17. The separation device of any one of claims 10-12, wherein, The second gas inlet is used to make the exhaust gas flow into the second accommodating cavity along the tangential direction of the separation piece.

18. An exhaust gas recirculation system characterized by, The separation device comprises any one of claims 1-17.

19. A vehicle characterized by comprising: The exhaust gas recirculation system comprises the separation device of claim 18.

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