A compact EGR cooler

Abstract

The utility model discloses a compact EGR cooler, including the shell, the air outlet joint, the air inlet joint, the liquid inlet support, the liquid outlet support and a plurality of heat exchange tube cores, and the air outlet joint and air inlet joint are arranged at the both ends of shell respectively, the shell is equipped with the liquid inlet and the liquid outlet, and the liquid inlet is arranged at the one end of shell close to the air outlet joint, and the liquid outlet is arranged at the one end of shell close to the air inlet joint, the liquid inlet support and liquid outlet support are all the Chinese character, and the liquid inlet support and liquid outlet support are all set up on the shell, and the liquid inlet support and liquid outlet support are set up one to one with the liquid inlet and the liquid outlet respectively, and the liquid inlet support and liquid outlet support all are equipped with the connecting hole. The technical effect reached is that: the liquid inlet and the liquid outlet adopt support connection, the support adopts the Chinese character, and the space occupied is small, and the whole EGR cooler can be fixed on the engine through the Chinese character support, the overall structure is compact, the supporting performance is stable, the reliability is high, and can be applicable to the engine of limited space.

Description

Technical Field

[0001] This utility model relates to the field of EGR cooler technology, specifically to a compact EGR cooler. Background Technology

[0002] EGR coolers cool vehicle exhaust gases, allowing them to re-enter the engine for reuse. EGR coolers effectively reduce the temperature and pressure within the engine's combustion chamber, decreasing nitrogen oxide production and thus helping to meet emission standards. Under current stringent environmental regulations, this function is crucial for reducing vehicle emissions. Introducing cooled exhaust gases into the engine also offers multiple energy-saving benefits. Firstly, the cooled exhaust gases increase the specific heat capacity of the air-fuel mixture, enhancing its ability to absorb heat. Secondly, the increased mass of the air-fuel mixture, along with its dilution effect and heat capacity effect, inhibits combustion, leading to a decrease in combustion temperature and a longer combustion duration. This alteration in combustion characteristics reduces heat transfer losses during combustion, thereby saving energy, improving engine fuel economy, and lowering energy consumption.

[0003] Existing EGR coolers are typically mounted using brackets, but these brackets are usually bulky and do not fit well with the coolant inlet and outlet, making them unsuitable for installations in spaces with limited space. Utility Model Content

[0004] Therefore, this invention provides a compact EGR cooler to solve the above-mentioned problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] According to a first aspect of the present invention, a compact EGR cooler includes a shell, an outlet connector, an inlet connector, a liquid inlet support, an outlet support, and a plurality of heat exchange tubes, wherein the outlet connector and the inlet connector are respectively disposed at both ends of the shell.

[0007] The tube shell is provided with a liquid inlet and a liquid outlet. The liquid inlet is located at the end of the tube shell near the air outlet connector, and the liquid outlet is located at the end of the tube shell near the air inlet connector. Both the liquid inlet support and the liquid outlet support are U-shaped and are sleeved on the tube shell. The liquid inlet support and the liquid outlet support are respectively provided in a one-to-one correspondence with the liquid inlet and the liquid outlet, and both the liquid inlet support and the liquid outlet support are provided with connection holes.

[0008] Multiple heat exchange tubes are arranged inside the shell along the length of the shell, with both ends of the heat exchange tubes extending into the outlet joint and the inlet joint, respectively, and a gap is provided between two adjacent heat exchange tubes.

[0009] Furthermore, it also includes a first flange and a second flange, wherein the first flange is disposed at the end of the air outlet joint opposite to the pipe shell, and the second flange is disposed at the end of the air inlet joint opposite to the pipe shell.

[0010] Furthermore, both the inlet support and the outlet support are snapped, welded, or slidably connected to the tube shell.

[0011] Furthermore, a first protruding edge is provided between the liquid inlet and the outer wall of the tube shell, and a second protruding edge is provided between the liquid outlet and the outer wall of the tube shell, both the first and second protruding edges being annular.

[0012] Furthermore, it also includes a first reinforcing plate and a second reinforcing plate, both of which are disposed on the tube shell. The first reinforcing plate is disposed at the liquid inlet, and the second reinforcing plate is disposed at the liquid outlet.

[0013] Furthermore, tube sheets are provided at both ends of the tube shell, the tube sheets are arranged in a direction perpendicular to the heat exchange tube core, and both ends of the heat exchange tube core pass through the tube sheets.

[0014] Furthermore, the heat exchange tube core is a rectangular tube, and multiple heat exchange tube cores are arranged parallel to each other and at fixed intervals.

[0015] Furthermore, the heat exchange tube core includes a flat tube and multiple fins, the fins being arranged inside the flat tube along its length, and each fin being arranged parallel to the others.

[0016] Furthermore, the outlet connector is equipped with a differential pressure sensor interface and a temperature sensor interface, and the differential pressure sensor interface is equipped with a differential pressure tube.

[0017] Furthermore, it also includes a pressure relief pipe, wherein a pressure relief port is provided on the side of the pipe shell opposite to the liquid outlet, and one end of the pressure relief pipe is connected to the pressure relief port.

[0018] This utility model has the following advantages: the liquid inlet and liquid outlet are connected by a bracket, the bracket is shaped like a "Z", which occupies little space. The entire EGR cooler can be fixed on the engine through the "Z" shaped bracket. The overall structure is compact, the support performance is stable, the reliability is high, and it is suitable for engines with limited space. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 This is a schematic diagram of the overall structure of a compact EGR cooler provided for some embodiments of the present invention.

[0022] Figure 2 This is a schematic diagram of the end structure of a compact EGR cooler provided for some embodiments of the present invention.

[0023] Figure 3 This is a schematic diagram of the exhaust port of a compact EGR cooler provided for some embodiments of the present invention.

[0024] Figure 4 This is a partial sectional view of a compact EGR cooler provided for some embodiments of the present invention.

[0025] Figure 5 Partial cross-sectional view of the end of a compact EGR cooler provided for some embodiments of this utility model.

[0026] Figure 6 This is a partial cross-sectional view of the heat exchanger core of a compact EGR cooler provided for some embodiments of the present invention.

[0027] In the diagram: 1. Tube shell, 2. Air outlet connector, 3. Air inlet connector, 4. First flange, 5. Second flange, 6. First reinforcing plate, 7. Second reinforcing plate, 8. Liquid inlet, 9. Liquid outlet, 10. First flange, 11. Second flange, 12. Liquid inlet support, 13. Liquid outlet support, 14. Heat exchange tube core, 15. Differential pressure tube, 16. Pressure relief tube, 17. Differential pressure sensor interface, 18. Temperature sensor interface, 19. Tube sheet, 20. Flat tube, 21. Fin. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Example 1

[0030] like Figures 1 to 6 As shown, a compact EGR cooler according to the first aspect of the present invention includes a shell 1, an outlet connector 2, an inlet connector 3, a liquid inlet support 12, an outlet support 13, and a plurality of heat exchange tube cores 14. The outlet connector 2 and the inlet connector 3 are respectively disposed at both ends of the shell 1. The outlet connector 2 is provided with an outlet chamber, and the inlet connector 3 is provided with an inlet chamber.

[0031] The tube shell 1 is provided with a liquid inlet 8 and a liquid outlet 9. The liquid inlet 8 is located at the end of the tube shell 1 near the air outlet connector 2, and the liquid outlet 9 is located at the end of the tube shell 1 near the air inlet connector 3. The tube shell 1 is rectangular, and both the liquid inlet support 12 and the liquid outlet support 13 are Z-shaped, specifically, as shown in... Figure 1 and Figure 2 As shown, the inlet support 12 and the outlet support 13 adopt a square saddle clip structure. Both the inlet support 12 and the outlet support 13 are sleeved on the tube shell 1. The inlet support 12 and the outlet support 13 are respectively set to correspond one-to-one with the inlet port 8 and the outlet port 9. Both the inlet support 12 and the outlet support 13 are provided with connection holes, which are used to install and fix the tube shell 1 with bolts.

[0032] Multiple heat exchange tubes 14 are arranged inside the shell 1 along the length of the shell 1. The two ends of the heat exchange tubes 14 extend into the outlet joint 2 and the inlet joint 3, respectively. There is a gap between two adjacent heat exchange tubes 14. During use, the coolant passes through the gap between the heat exchange tubes 14 and the airflow passes through the heat exchange tubes 14. The flow direction of the coolant and the flow direction of the airflow are opposite. The heat exchange tubes 14 use the coolant to exchange heat and cool the airflow.

[0033] The air outlet connector 2 is equipped with a differential pressure sensor interface 17 and a temperature sensor interface 18. Both the differential pressure sensor interface 17 and the temperature sensor interface 18 are connected to the air outlet chamber inside the air outlet connector 2. The differential pressure sensor interface 17 is equipped with a differential pressure tube 15, and the temperature sensor interface 18 is used to connect a temperature sensor to monitor the airflow temperature.

[0034] In this embodiment, it should be noted that both the inlet support 12 and the outlet support 13 are snapped, welded, or slidably connected to the tube shell 1.

[0035] Furthermore, a pressure relief port is provided on the side of the tube shell 1 away from the liquid outlet 9, and one end of the pressure relief pipe 16 is connected to the pressure relief port. By setting the pressure relief port and the pressure relief pipe, local pressure buildup inside the tube shell can be effectively prevented during use, and the overall performance is safer and more reliable.

[0036] The technical effects achieved in this embodiment are as follows: the liquid inlet and liquid outlet are connected by a bracket, which is shaped like a "Z" and occupies little space. The entire EGR cooler can be fixed on the engine through the "Z" shaped bracket. The overall structure is compact, the support performance is stable, and the reliability is high. It can be applied to engines with limited space. The differential pressure sensor interface 17 and the temperature sensor interface 18 are set in the exhaust connector 2, which has a high degree of integration.

[0037] Example 2

[0038] like Figures 1 to 6 As shown, this embodiment provides another compact EGR cooler, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0039] In this embodiment, the end of the air outlet connector 2 facing away from the pipe shell 1 is provided with a first flange 4, which is an integral structure with the pipe shell 1. The end of the air inlet connector 3 facing away from the pipe shell 1 is provided with a second flange 5, which is an integral structure with the air inlet connector 3. By setting the first flange 4 and the second flange 5, the air inlet pipe and the air outlet pipe can be quickly connected.

[0040] In this embodiment, it should be noted that tube sheets 19 are provided at both ends of the tube shell 1. The tube sheets 19 are arranged in a direction perpendicular to the heat exchange tube core 14. Both ends of the heat exchange tube core 14 pass through the tube sheets 19. The tube sheets 19 at both ends of the tube shell 1 are used to separate the cooling chamber inside the tube shell 1 from the air inlet chamber and the air outlet chamber.

[0041] Example 3

[0042] like Figures 1 to 6 As shown, this embodiment provides another compact EGR cooler, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0043] In this embodiment, both the liquid inlet 8 and the liquid outlet 9 are rectangular with a large cross-section and a short path. The heat exchange tube cores are arranged with a large gap, resulting in a small pressure loss of the coolant. A first protrusion 10 is provided between the liquid inlet 8 and the outer wall of the tube shell 1, and a second protrusion 11 is provided between the liquid outlet 9 and the outer wall of the tube shell 1. Both the first protrusion 10 and the second protrusion 11 are annular.

[0044] In this embodiment, it should be noted that a first reinforcing plate 6 and a second reinforcing plate 7 are also included. Both the first reinforcing plate 6 and the second reinforcing plate 7 are disposed on the tube shell 1. The first reinforcing plate 6 is disposed at the liquid inlet 8, and the second reinforcing plate 7 is disposed at the liquid outlet 9.

[0045] The technical effects achieved in this embodiment are as follows: both the inlet 8 and the outlet 9 are rectangular. By setting the first convex edge 10 and the second convex edge 11, the inlet pipe and the outlet pipe can be quickly positioned and installed. When used with the sealing ring, the sealing performance of the connection can be effectively guaranteed. By setting the first reinforcing plate 6 and the second reinforcing plate 7, the strength of the shell 1 at the inlet 8 and the outlet 9 can be guaranteed.

[0046] Example 4

[0047] like Figures 1 to 6 As shown, this embodiment provides another compact EGR cooler, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0048] In this embodiment, the heat exchange tube 14 is a rectangular tube, and multiple heat exchange tubes 14 are arranged parallel to each other and at fixed intervals.

[0049] In this embodiment, it should be noted that, as Figure 6 As shown, the heat exchange tube core 14 includes a flat tube 20 and multiple fins 21. The flat tube 20 is rectangular, and the fins 21 are arranged inside the flat tube 20 along the length direction of the flat tube 20. The fins 21 are welded to the flat tube 20. The multiple fins 21 are parallel to each other and equally spaced, and airflow channels are formed between each fin 21. The rectangular flat tube 20 has a higher heat exchange efficiency than the arc-shaped flat tube.

[0050] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0051] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A compact EGR cooler characterized by, It includes a shell (1), an outlet connector (2), an inlet connector (3), a liquid inlet support (12), an outlet support (13), and multiple heat exchange tube cores (14). The outlet connector (2) and the inlet connector (3) are respectively located at both ends of the shell (1). The tube shell (1) is provided with an inlet (8) and an outlet (9). The inlet (8) is located at one end of the tube shell (1) near the air outlet (2), and the outlet (9) is located at one end of the tube shell (1) near the air inlet (3). The inlet support (12) and the outlet support (13) are both U-shaped. The inlet support (12) and the outlet support (13) are both sleeved on the tube shell (1). The inlet support (12) and the outlet support (13) are respectively provided in one-to-one correspondence with the inlet (8) and the outlet (9), and the inlet support (12) and the outlet support (13) are both provided with connection holes. Multiple heat exchange tube cores (14) are arranged inside the tube shell (1) along the length direction of the tube shell (1). The two ends of the heat exchange tube cores (14) extend into the air outlet joint (2) and the air inlet joint (3) respectively. There is a gap between two adjacent heat exchange tube cores (14).

2. A compact EGR cooler according to claim 1, characterized in that It also includes a first flange (4) and a second flange (5), the first flange (4) being disposed at the end of the air outlet connector (2) away from the pipe shell (1), and the second flange (5) being disposed at the end of the air inlet connector (3) away from the pipe shell (1).

3. A compact EGR cooler according to claim 1, wherein Both the inlet support (12) and the outlet support (13) are snapped, welded, or slidably connected to the shell (1).

4. A compact EGR cooler according to claim 1, wherein A first protruding edge (10) is provided between the liquid inlet (8) and the outer wall of the tube shell (1), and a second protruding edge (11) is provided between the liquid outlet (9) and the outer wall of the tube shell (1). Both the first protruding edge (10) and the second protruding edge (11) are annular.

5. A compact EGR cooler according to claim 4, wherein It also includes a first reinforcing plate (6) and a second reinforcing plate (7), both of which are disposed on the tube shell (1). The first reinforcing plate (6) is disposed at the liquid inlet (8), and the second reinforcing plate (7) is disposed at the liquid outlet (9).

6. A compact EGR cooler according to claim 1, wherein The tube shell (1) is provided with tube sheets (19) at both ends. The tube sheets (19) are arranged in a direction perpendicular to the heat exchange tube core (14). The two ends of the heat exchange tube core (14) pass through the tube sheets (19).

7. A compact EGR cooler according to claim 1, characterized in that, The heat exchange tube core (14) is a rectangular tube, and multiple heat exchange tube cores (14) are arranged parallel to each other and at fixed intervals.

8. A compact EGR cooler according to claim 7, wherein The heat exchange tube core (14) includes a flat tube (20) and a plurality of fins (21). The fins (21) are arranged inside the flat tube (20) along the length direction of the flat tube (20), and each of the fins (21) is arranged parallel to each other.

9. A compact EGR cooler according to claim 1, characterized in that, The air outlet connector (2) is provided with a differential pressure sensor interface (17) and a temperature sensor interface (18), and the differential pressure sensor interface (17) is provided with a differential pressure tube (15).

10. A compact EGR cooler according to claim 1, characterized in that, It also includes a pressure relief pipe (16), and the pipe shell (1) is provided with a pressure relief port on the side away from the liquid outlet (9), and one end of the pressure relief pipe (16) is connected to the pressure relief port.

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