A heat exchange device, an exhaust gas recirculation system, an engine and a vehicle
Patent Information
- Application Number
- CN202522328832.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-03
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-03
AI Technical Summary
[0003]但是，EGR冷却器和机油冷却器等多采用独立布置的形式，需要占用发动机舱的内部空间，且需要配置较大规模的辅助管路等附件，从而一定程度上增大了发动机及周边部件的规划布置难度和干涉风险
本申请实施例提供的换热装置、废气再循环系统、发动机及车辆，包括壳体、第一换热件以及第二换热件，所述壳体内开设有换热容腔，所述第一换热件和所述第二换热件设置在所述换热容腔内；且所述壳体上开设有与所述换热容腔连通的进液口和出液口，用于冷却介质进出所述换热容腔，并使得冷却介质与所述第一换热件和所述第二换热件循环换热；所述第一换热件和所述第二换热件内分别开设有第一流道和第二流道，作为废气和机油的流道，从而实现发动机的废气、机油以及冷却介质的循环换热；在冷机工况下，发动机的废气通过所述第一换热件时，能够加热换热容腔内的冷却介质，并间接加热所述第二换热件中的机油，从而缩短暖机时间，降低能耗，提升燃料热效率，同时也能够迅速降低废气温度，便于回输给发动机燃烧，提升燃料利用率；在暖机工况或者热机工况下，通过冷却介质循环冷却机油和废气，保持机油润滑质量和提升废气回收燃烧利用率；另一方面，所述第一换热件和所述第二换热件集成在所述壳体内，形成换热结构，整体上能够实现紧凑布置，并缩小辅助管路等附件的规模，从而整体上降低了发动机舱内的空间占用，降低与周边结构的干涉风险。
Smart Images
Figure CN224785824U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of vehicle engineering technology, and in particular relates to a heat exchange device, an exhaust gas recirculation system, an engine, and a vehicle. Background Technology
[0002] In the cooling system of a car engine, heat exchange elements such as EGR coolers and oil coolers are usually installed to accommodate the circulating flow of the cooling medium, realize the heat exchange between the cooling medium and engine exhaust gas and engine oil, and thus carry out heat exchange processes such as exhaust gas cooling, engine oil heating or cooling, and cooling of the cooling medium.
[0003] However, EGR coolers and oil coolers are often independently arranged, requiring internal space in the engine compartment and necessitating the installation of large-scale auxiliary piping and other accessories. This increases the difficulty and risk of interference in the planning and layout of the engine and surrounding components. Furthermore, EGR coolers rely solely on circulating cooling media to cool exhaust gases, resulting in heat loss from the high-temperature exhaust gases and relatively low fuel thermal efficiency, which in turn contributes to higher engine energy consumption. Summary of the Invention
[0004] This application provides a heat exchange device, an exhaust gas recirculation system, an engine, and a vehicle, aiming to at least partially solve the technical problems of large space occupation, high risk of interference with surrounding structures, and high heat loss. Therefore, One aspect of this application provides a heat exchange device, including: The shell has a heat exchange cavity, and the shell has an inlet and an outlet that communicate with the heat exchange cavity; A first heat exchanger is disposed within the heat exchange cavity, and a first flow channel is provided inside the first heat exchanger, with first connection ports configured at both ends of the first flow channel. The second heat exchanger is disposed within the heat exchange cavity, and the second heat exchanger has a second flow channel inside, with second connection ports configured at both ends of the second flow channel.
[0005] In some embodiments, the first heat exchanger includes a first heat exchange fin.
[0006] In some embodiments, the first heat exchange fins are multiple, and the multiple first heat exchange fins are arranged in parallel.
[0007] In some embodiments, the second heat exchanger includes a second heat exchange fin, and the second heat exchange fin is multiple fins arranged in parallel.
[0008] In some embodiments, the plurality of second heat exchange fins are arranged alternately with the plurality of first heat exchange fins, and adjacent second heat exchange fins and first heat exchange fins have spacer channels.
[0009] In some embodiments, the flow directions in the first and second flow channels are orthogonal.
[0010] In some embodiments, the liquid inlet and the liquid outlet are located on opposite sides of the first heat exchanger and the second heat exchanger.
[0011] Another aspect of this application provides an exhaust gas recirculation system, including the aforementioned heat exchange device.
[0012] In another aspect of this application, an engine is also provided, including the aforementioned exhaust gas recirculation system.
[0013] In another aspect of this application, a vehicle is also provided, including the aforementioned engine. The embodiments of this application have at least the following beneficial effects: The heat exchange device, exhaust gas recirculation system, engine, and vehicle provided in this application include a housing, a first heat exchanger, and a second heat exchanger. A heat exchange cavity is formed within the housing, and the first and second heat exchangers are disposed within the heat exchange cavity. An inlet and an outlet communicating with the heat exchange cavity are provided on the housing for the cooling medium to enter and exit the heat exchange cavity, allowing the cooling medium to circulate and exchange heat with the first and second heat exchangers. A first flow channel and a second flow channel are respectively formed within the first and second heat exchangers, serving as flow channels for exhaust gas and engine oil, thereby achieving circulatory heat exchange of engine exhaust gas, engine oil, and cooling medium. Under cold engine conditions, the engine exhaust gas passes through the... When the first heat exchanger is installed, it can heat the cooling medium in the heat exchange cavity and indirectly heat the engine oil in the second heat exchanger, thereby shortening the warm-up time, reducing energy consumption, and improving fuel thermal efficiency. At the same time, it can also quickly reduce the exhaust gas temperature, making it easier to return to the engine for combustion and improving fuel utilization. In warm-up or hot-up conditions, the engine oil and exhaust gas are cooled by circulating the cooling medium, maintaining the lubrication quality of the engine oil and improving the utilization rate of exhaust gas recovery and combustion. On the other hand, the first and second heat exchangers are integrated in the housing to form a heat exchange structure, which can achieve a compact arrangement and reduce the size of auxiliary pipelines and other accessories, thereby reducing the space occupied in the engine compartment and reducing the risk of interference with surrounding structures. Attached Figure Description
[0014] 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 accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 A schematic diagram of the heat exchange device in an embodiment of this application is shown; Figure 2 It shows Figure 1 Another angle schematic diagram of the heat exchange device in the diagram; Figure 3 It shows Figure 1 A schematic diagram of the assembly state of the shell, the second heat exchanger and the first heat exchanger in the heat exchange device; Figure 4 It shows Figure 1 A partial cross-sectional view of the heat exchange device.
[0016] Figure label: 1-Shell, 1a-Heat exchange cavity, 1b-Interval flow channel, 11-Liquid inlet, 12-Liquid outlet, 13-Axial window, 14-Radial window, 15-Cooling medium inlet / outlet window; 2-First heat exchanger, 2a-First flow channel, 21-First connection port, 22-First heat exchange fin; 3-Second heat exchanger, 3a-Second flow channel, 31-Second connection port, 32-Second heat exchange fin. Detailed Implementation
[0017] 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 the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0018] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0019] This application is described below with reference to the accompanying drawings and specific embodiments: The engine's cooling system is equipped with an EGR cooler, an oil cooler, and water-cooled circulation pipes, all of which are independently and separately arranged. With the help of circulating cooling media, exhaust gas and oil are cooled. However, the overall space occupied is large, and there is a high risk of interference with surrounding structures. Moreover, the existing engine has a long warm-up time, high energy consumption, and unsatisfactory exhaust emission control under cold conditions, resulting in a high degree of pollution.
[0020] Therefore, this application provides a heat exchange device applied to the exhaust gas recirculation system (EGR system) and the engine's circulating cooling system. By integrating the exhaust gas cooling structure, the oil cooling structure, and the cooling medium circulation structure, the space occupied is reduced; and the exhaust gas exchanges heat with the cooling medium and the oil, thereby recovering the heat of the exhaust gas to accelerate warm-up, promoting exhaust gas recovery and combustion, and reducing energy consumption under cold and warm-up conditions.
[0021] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the heat exchange device is configured as an integrated heat exchange structure that can simultaneously accommodate the engine's circulating cooling medium, exhaust gas, and engine oil, thereby achieving heat exchange between the three media and simplifying the overall exhaust gas cooling structure, engine oil cooling structure, and circulating cooling medium heat exchange structure.
[0022] Specifically, the heat exchange device includes a shell 1, a first heat exchange element 2, and a second heat exchange element 3, which serve as heat exchange containers for cooling medium (such as cooling water), exhaust gas (mainly referring to exhaust gas recovered by the EGR system), and engine oil, respectively.
[0023] The housing 1 has a heat exchange cavity 1a connected to it by an inlet 11 and an outlet 12, forming a ring in the flow path of the cooling medium in the engine, allowing the circulating cooling medium to flow through the housing 1. The housing 1 accommodates the cooling medium, the first heat exchanger 2, and the second heat exchanger 3, thereby achieving heat exchange between the cooling medium and the high-temperature exhaust gas in the first heat exchanger 2 and the engine oil in the second heat exchanger 3, thus cooling the exhaust gas and heating the cooling medium. Especially under cold and warm-up conditions, it can utilize the waste heat of the exhaust gas to quickly heat the cooling medium, thereby rapidly increasing the temperature of the engine and internal media such as fuel and engine oil, shortening warm-up time, improving warm-up efficiency, reducing fuel consumption, and minimizing equipment wear.
[0024] The first heat exchanger 2 is configured as part of the exhaust gas recirculation system. It has a first flow channel 2a inside, with first connection ports 21 at both ends, connecting to the exhaust gas recirculation pipeline. This allows the first flow channel 2a to communicate with the exhaust gas recirculation pipeline, facilitating exhaust gas circulation. High-temperature exhaust gas exchanges heat with the cooling medium through the first heat exchanger 2, thereby cooling the exhaust gas, which then enters the exhaust gas treatment stage or is returned to the engine for combustion.
[0025] The second heat exchanger 3 can be configured as part of the oil circulation structure. It has a second flow channel 3a inside, and second connection ports 31 at both ends of the second flow channel 3a, respectively connected to the oil circulation pipeline, so that the second flow channel 3a is connected to the oil circulation channel for oil circulation. The oil exchanges heat with the cooling medium through the second heat exchanger 3 to cool high-temperature oil or heat low-temperature oil, thereby ensuring lubrication performance. Especially under cold and warm-up conditions, it can utilize waste heat from exhaust gases to quickly add oil, thereby rapidly increasing the temperature of the engine and internal oil, shortening warm-up time, improving warm-up efficiency, reducing fuel consumption, and minimizing equipment wear.
[0026] It is worth noting that when the engine is in hot operating condition, the engine, engine exhaust gas and engine oil are at a high temperature, which can exchange heat with the cooling medium in the heat exchange cavity 1a, thereby reducing the temperature of the engine and the internal engine oil and exhaust gas, so as to ensure the stability of the engine's operating state.
[0027] In some embodiments, the housing 1 may be configured as a generally regular cylindrical structure, thereby accommodating more cooling medium and allowing the heat exchange areas of the first heat exchanger 2 and the second heat exchanger 3 to be larger.
[0028] Generally, for ease of installation, the housing 1 can be configured as a cylindrical component, and the first heat exchanger 2 and the second heat exchanger 3 can be arranged along the length and width directions of the housing 1, thereby simplifying the assembly operation and making reasonable use of the space within the heat exchange cavity 1a.
[0029] In some embodiments, for ease of installation, an axial window 13 may be provided at the end of the housing 1 along its length to facilitate the axial insertion of the first heat exchanger 2. Similarly, a radial window 14 may be provided in the width direction of the housing 1 to facilitate the radial insertion of the second heat exchanger 3.
[0030] Correspondingly, the housing 1 is provided with a cooling medium inlet / outlet window 15, which is used to connect the liquid inlet 11 and the liquid outlet 12, thereby realizing the circulation of the cooling medium.
[0031] In some embodiments, in order to improve heat exchange efficiency, the first heat exchanger 2 may include a first heat exchange fin 22, thereby making full use of the heat exchange cavity 1a and obtaining a larger heat exchange area.
[0032] Especially when the shell 1 is a generally regular cylindrical part, the first heat exchange fin 22 can be made larger, and the heat exchange area is correspondingly larger, which helps to improve the heat exchange efficiency.
[0033] In some embodiments, considering that the first heat exchange fin 22 has a large area but a small thickness, the number of the first heat exchange fin 22 can be set to multiple pieces, so that they can be spaced apart along the thickness direction. An interval flow channel 1b is provided between two adjacent first heat exchange fins 22 to ensure the flow efficiency of the cooling medium and thus ensure the heat exchange efficiency.
[0034] In some embodiments, the multiple first heat exchange fins 22 can be arranged in approximately parallel order to ensure that the flow channel specifications are approximately consistent, that the heat exchange capacity of the multiple first heat exchange fins 22 is approximately equal, and that the overall heat exchange efficiency is guaranteed.
[0035] In some embodiments, the second heat exchanger 3 may also include a second heat exchange fin 32, thereby enabling full utilization of the heat exchange cavity 1a and obtaining a larger heat exchange area.
[0036] Especially when the shell 1 is a generally regular cylindrical part, the second heat exchange fin 32 can be made larger, and the heat exchange area is correspondingly larger, which helps to improve the heat exchange efficiency.
[0037] In some embodiments, considering that the second heat exchange fin 32 has a large area but a small thickness, the number of the second heat exchange fin 32 can be set to multiple pieces, so that they can be spaced apart along the thickness direction. A spacer flow channel 1b can also be provided between two adjacent second heat exchange fins 32 to ensure the flow efficiency of the cooling medium and thus ensure the heat exchange efficiency.
[0038] In some embodiments, the multiple second heat exchange fins 32 can be arranged in approximately parallel order to ensure that the flow channel specifications are approximately consistent, that the heat exchange capacity of the multiple second heat exchange fins 32 is approximately equal, and that the overall heat exchange efficiency is guaranteed.
[0039] In some embodiments, in order to improve the heat exchange efficiency between the first heat exchanger 2 and the second heat exchanger 3, the first heat exchanger 2 and the second heat exchanger 3 can be arranged close together to shorten the heat transfer path, thereby improving the heat exchange efficiency.
[0040] Correspondingly, the first heat exchange fins 22 and the second heat exchange fins 32 can be arranged alternately, that is, a second fin 32 is provided between two adjacent first heat exchange fins 22, thereby promoting heat transfer between the first heat exchange fins 22 and the second heat exchange fins 32 to a certain extent.
[0041] In some embodiments, considering that exhaust gas and engine oil flow in the first heat exchanger 2 and the second heat exchanger 3 respectively, in order to improve heat exchange efficiency, the flow directions of the two can be differentiated, that is, the flow directions of the two are different, so that the temperature difference between the two is always kept at a relatively high level, thereby helping to improve heat exchange efficiency.
[0042] Generally, the flow directions of the first flow channel 2a and the second flow channel 3a can be made approximately orthogonal, so that the temperature difference between them is at a high level.
[0043] In some embodiments, considering that the cooling medium is a heat exchange medium, in order to improve the heat exchange efficiency, the liquid inlet 11 and the liquid outlet 12 can be arranged on both sides of the first heat exchanger 2 and the second heat exchanger 3, so that the flowing cooling medium can cover most of the area of the first heat exchanger 2 and the second heat exchanger 3, thereby increasing the heat exchange capacity.
[0044] In some embodiments, the first connection port 21 may close the axial window 13 after the first fin 22 is inserted; fixation and sealing may be achieved through a sealing element or welding process.
[0045] Similarly, the second connection port 31 can also close the radial window 14 after the second fin 22 is inserted; fixation and sealing can be achieved through sealing elements or welding processes.
[0046] In another aspect of this application embodiment, an exhaust gas recirculation system is also provided, including the heat exchange device described above; wherein, the liquid inlet 11 and the liquid outlet 12 are respectively connected to the cooling medium circulation structure of the engine, and the cooling medium flows through the heat exchange torch 1a; the two first connection ports 21 are respectively connected to the circulation structure of the engine's EGR system, and the high-temperature exhaust gas flows through the first flow channel 2a; the two second connection ports 31 are respectively connected to the engine's oil circulation structure, and the oil flows through the second flow channel 3a.
[0047] In another aspect of the embodiments of this application, an engine is also provided, including the exhaust gas recirculation system described above.
[0048] Generally, the engine can be a gasoline engine or a range extender engine.
[0049] In another aspect of this application, a vehicle is also provided, including the engine described above.
[0050] Generally, the vehicle in question can be a gasoline-powered vehicle or a new energy vehicle equipped with a range-extending engine.
[0051] The embodiments of this application have at least the following beneficial effects: The heat exchange device, exhaust gas recirculation system, engine, and vehicle provided in this application include a housing, a first heat exchanger, and a second heat exchanger. A heat exchange cavity is formed within the housing, and the first and second heat exchangers are disposed within the heat exchange cavity. An inlet and an outlet communicating with the heat exchange cavity are provided on the housing for the cooling medium to enter and exit the heat exchange cavity, allowing the cooling medium to circulate and exchange heat with the first and second heat exchangers. A first flow channel and a second flow channel are respectively formed within the first and second heat exchangers, serving as flow channels for exhaust gas and engine oil, thereby achieving circulatory heat exchange of engine exhaust gas, engine oil, and cooling medium. Under cold engine conditions, the engine exhaust gas passes through the... When the first heat exchanger is installed, it can heat the cooling medium in the heat exchange cavity and indirectly heat the engine oil in the second heat exchanger, thereby shortening the warm-up time, reducing energy consumption, and improving fuel thermal efficiency. At the same time, it can also quickly reduce the exhaust gas temperature, making it easier to return to the engine for combustion and improving fuel utilization. In warm-up or hot-up conditions, the engine oil and exhaust gas are cooled by circulating the cooling medium, maintaining the lubrication quality of the engine oil and improving the utilization rate of exhaust gas recovery and combustion. On the other hand, the first and second heat exchangers are integrated in the housing to form a heat exchange structure, which can achieve a compact arrangement and reduce the size of auxiliary pipelines and other accessories, thereby reducing the space occupied in the engine compartment and reducing the risk of interference with surrounding structures.
[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0053] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.
[0054] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In this application, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of the aforementioned features. In the description of this application, "multiple" means two or more, unless otherwise explicitly and specifically limited.
[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0056] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0057] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A heat exchange device, characterized in that, include: The shell has a heat exchange cavity, and the shell has an inlet and an outlet that communicate with the heat exchange cavity; A first heat exchanger is disposed within the heat exchange cavity, and a first flow channel is provided inside the first heat exchanger, with first connection ports configured at both ends of the first flow channel. The second heat exchanger is disposed within the heat exchange cavity, and the second heat exchanger has a second flow channel inside, with second connection ports configured at both ends of the second flow channel.
2. The heat exchange device as described in claim 1, characterized in that, The first heat exchange element includes a first heat exchange fin.
3. The heat exchange device as described in claim 2, characterized in that, The first heat exchange fin consists of multiple fins, and the multiple first heat exchange fins are arranged in parallel.
4. The heat exchange device as described in claim 3, characterized in that, The second heat exchanger includes a second heat exchange fin, and there are multiple second heat exchange fins arranged in parallel.
5. The heat exchange device as described in claim 4, characterized in that, The multiple second heat exchange fins are arranged alternately with the multiple first heat exchange fins, and there are spaced flow channels between adjacent second heat exchange fins and first heat exchange fins.
6. The heat exchange device as described in claim 1, characterized in that, The flow directions in the first and second flow channels are orthogonal.
7. The heat exchange device as described in claim 1, characterized in that, The liquid inlet and the liquid outlet are located on opposite sides of the first heat exchanger and the second heat exchanger.
8. A waste gas recirculation system, characterized in that, Includes the heat exchange device as described in any one of claims 1 to 7.
9. An engine, characterized in that, Includes the exhaust gas recirculation system as described in claim 8.
10. A vehicle, characterized in that, Including the engine as described in claim 9.