EGR (Exhaust Gas Recirculation) cooling equipment suitable for severe working environment

Abstract

An EGR cooling device suitable for a severe working environment is characterized in that one end of a tube shell body is connected with an air inlet chamber, and the other end of the tube shell body is connected with an air outlet chamber; a water inlet pipe is arranged on the side part of the tube shell body close to the air inlet chamber; a water outlet pipe is arranged on the side part of the tube shell body close to the air outlet chamber; a heat exchange tube core is arranged in the tube shell body, the inlet end of the heat exchange tube core is communicated with the air inlet chamber, and the outlet end of the heat exchange tube core is communicated with the air outlet chamber; the heat exchange tube core comprises a heat exchange tube body, a heat exchange channel is formed in the heat exchange tube body, a first concave surface structure is formed on the upper surface of the heat exchange channel, and a second concave surface structure is formed on the lower surface of the heat exchange channel; the first concave surface structures and the second concave surface structures are distributed in a staggered mode. The device is simple in overall structure and high in stability; the heat exchange tubes do not contain fins and have multiple groups, so that the air side pressure loss is favorably reduced, the heat exchange area is effectively increased, and the heat exchange efficiency is improved; and the device is more suitable for severe working environments.

Description

Technical Field

[0001] The utility model relates to an EGR cooling device suitable for harsh working environments, belonging to the technical field of EGR cooling. Background Art

[0002] Currently, automotive exhaust gas is cooled by an EGR cooler before being recirculated into the engine. This not only reduces the temperature and pressure within the engine combustion chamber, reducing NOx production and ensuring that exhaust emissions meet standards, but also increases the specific heat capacity and overall mass of the mixed air. The dilution and heat capacity effects of the exhaust gas inhibit combustion, resulting in lower combustion temperatures, longer combustion duration, and reduced heat transfer losses during combustion, ultimately saving energy.

[0003] The heat exchange tube is the core heat exchange component of the EGR cooler. EGR coolers currently on the market, especially those used in gasoline or hybrid engines, generally use a heat exchange tube core in the form of a flat tube and fin assembly. The flat tube and fins need to be assembled and welded before being assembled into the cooler. This places high demands on the welding reliability of the flat tube and fin, resulting in a complex overall structure and poor stability. The inclusion of fins and the large number of groups hinders the reduction of air-side pressure loss, making it unsuitable for harsh operating environments. Utility Model Content

[0004] To this end, the utility model provides an EGR cooling device suitable for harsh working environments, which solves the problems of traditional technologies such as complex structure, poor stability, high air side pressure loss, and unsuitability for harsh working environments.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an EGR cooling device suitable for harsh working environments, comprising a shell and tube body, one end of the shell and tube body is connected to an air intake chamber, and the other end of the shell and tube body is connected to an air outlet chamber; a water inlet pipe is provided on the side of the shell and tube body near the air intake chamber, and a water outlet pipe is provided on the side of the shell and tube body near the air outlet chamber; a heat exchange tube core is provided inside the shell and tube body, the inlet end of the heat exchange tube core is connected to the air intake chamber, and the outlet end of the heat exchange tube core is connected to the air outlet chamber; the heat exchange tube core comprises a heat exchange tube body, a heat exchange channel is formed inside the heat exchange tube body, a first concave structure is formed on the upper surface of the heat exchange channel, and a second concave structure is formed on the lower surface of the heat exchange channel; the first concave structure and the second concave structure are staggered with each other.

[0006] As a preferred solution for EGR cooling equipment suitable for harsh working environments, the first concave structure has a sinusoidal corrugation shape; the second concave structure has a sinusoidal corrugation shape.

[0007] As a preferred solution for EGR cooling equipment suitable for harsh working environments, a plurality of first concave grooves are distributed on the left side of the heat exchange channel; and a plurality of second concave grooves are distributed on the right side of the heat exchange channel.

[0008] As a preferred solution for the EGR cooling device suitable for harsh working environments, the upper end of the tube shell body is connected to a first mounting bracket, and the lower end of the tube shell body is connected to a second mounting bracket.

[0009] As a preferred solution for EGR cooling equipment suitable for harsh working environments, the number of the heat exchange tube bodies is greater than one, and the ends of several of the heat exchange tube bodies are connected to fixing plates;

[0010] The fixing plate is formed with a through opening corresponding to the heat exchange tube body.

[0011] As a preferred solution of the EGR cooling device suitable for harsh working environments, the number of the first concave structures formed on the upper surface of the heat exchange channel is greater than one;

[0012] The number of the second concave structures formed on the lower surface of the heat exchange channel is greater than one.

[0013] As a preferred solution for EGR cooling equipment suitable for harsh working environments, the first concave surface structure is a plurality of waist-shaped grooves, and the second concave surface structure is a plurality of waist-shaped grooves.

[0014] The utility model has the following advantages: one end of the shell body is connected to the air inlet chamber, and the other end of the shell body is connected to the air outlet chamber; a water inlet pipe is provided on the side of the shell body near the air inlet chamber, and a water outlet pipe is provided on the side of the shell body near the air outlet chamber; a heat exchange tube core is provided inside the shell body, the inlet end of the heat exchange tube core is connected to the air inlet chamber, and the outlet end of the heat exchange tube core is connected to the air outlet chamber; the heat exchange tube core includes a heat exchange tube body, a heat exchange channel is formed inside the heat exchange tube body, the upper surface of the heat exchange channel is formed with a first concave structure, and the lower surface of the heat exchange channel is formed with a second concave structure; the first concave structure and the second concave structure are staggered with each other. The utility model has a simple overall structure and high stability; the heat exchange tubes do not contain fins and have a large number of groups, which is conducive to reducing gas-side pressure loss, effectively increasing the heat exchange area, and improving heat exchange efficiency; it is more suitable for harsh working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only exemplary, and those skilled in the art can also derive other implementation drawings based on the provided drawings without inventive effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, provided they do not affect the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of an EGR cooling device suitable for harsh working environments provided in an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of an EGR cooling device suitable for harsh working environments provided in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the end portion of an EGR cooling device suitable for harsh working environments provided in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the heat exchange tube body of the EGR cooling device suitable for harsh working environments provided in an embodiment of the utility model;

[0021] Figure 5 This is a schematic cross-sectional structure diagram of a heat exchange tube body of an EGR cooling device suitable for harsh working environments provided in an embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of another heat exchange tube body structure of an EGR cooling device suitable for harsh working environments provided in an embodiment of the present utility model.

[0023] In the figure, 1. tube shell body; 2. air inlet chamber; 3. air outlet chamber; 4. water inlet pipe; 5. water outlet pipe; 6. heat exchange tube core; 7. heat exchange tube body; 8. heat exchange channel; 9. first concave structure; 10. second concave structure; 11. first concave groove; 12. second concave groove; 13. first mounting bracket; 14. second mounting bracket; 15. fixing plate. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0025] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The embodiment of the present invention provides an EGR cooling device suitable for harsh working environments, including a shell and tube body 1, one end of the shell and tube body 1 is connected to an air intake chamber 2, and the other end of the shell and tube body 1 is connected to an air outlet chamber 3; a water inlet pipe 4 is provided on the side of the shell and tube body 1 near the air intake chamber 2, and a water outlet pipe 5 is provided on the side of the shell and tube body 1 near the air outlet chamber 3; a heat exchange tube core 6 is provided inside the shell and tube body 1, the inlet end of the heat exchange tube core 6 is connected to the air intake chamber 2, and the outlet end of the heat exchange tube core 6 is connected to the air outlet chamber 3; the heat exchange tube core 6 includes a heat exchange tube body 7, a heat exchange channel 8 is formed inside the heat exchange tube body 7, the upper surface of the heat exchange channel 8 is formed with a first concave structure 9, and the lower surface of the heat exchange channel 8 is formed with a second concave structure; the first concave structure 9 and the second concave structure 10 are staggered with each other.

[0026] In this embodiment, the first concave structure 9 has a sinusoidal corrugation shape; the second concave structure has a sinusoidal corrugation shape; a plurality of first concave grooves 11 are distributed on the left side of the heat exchange channel 8; and a plurality of second concave grooves 12 are distributed on the right side of the heat exchange channel 8.

[0027] See also Figure 2 and Figure 3 Specifically, the design of the first concave structure 9, the second concave structure, the first concave groove 11, and the second concave groove 12 improves the structural strength of the heat exchange tube body 7 on the one hand, and increases the surface area of the heat exchange tube body 7 on the other hand, thereby improving the heat exchange efficiency.

[0028] The first and second concave structures 9 are designed as sinusoidal corrugations, imitating the shape of corrugated fins. When gas enters the heat exchange tube body 7, the presence of the corrugations reduces the flow velocity, allowing for sufficient heat exchange between the hot and cold media. Furthermore, the first and second concave structures 9 on the upper and lower surfaces are staggered to reduce the height of the heat exchange tube body 7, allowing for the arrangement of more sets of heat exchange tube bodies 7 within the limited space within the cooler shell body 1.

[0029] In this embodiment, the upper end of the tube shell body 1 is connected to a first mounting bracket 13, and the lower end of the tube shell body 1 is connected to a second mounting bracket 14. The first mounting bracket 13 and the second mounting bracket 14 play a role in mounting and fixing the tube shell body 1.

[0030] In this embodiment, there are more than one heat exchange tube body 7, and the ends of several heat exchange tube bodies 7 are connected to a fixing plate 15; the fixing plate 15 has openings corresponding to the heat exchange tube bodies 7. The fixing plate 15 arranges the multiple heat exchange tube bodies 7 inside the shell body 1. At the same time, the gaps outside the multiple heat exchange tube bodies 7 are connected to the water inlet pipe 4, thereby enabling sufficient heat exchange between the gas inside the air inlet chamber 2 and the external cooling water.

[0031] In a possible embodiment, the number of first concave structures 9 formed on the upper surface of the heat exchange channel 8 is greater than one; the number of second concave structures formed on the lower surface of the heat exchange channel 8 is greater than one. By closely arranging the first concave structures 9 and the second concave structures on the upper and lower surfaces of the heat exchange channel 8, the surface area of the heat exchange tube body 7 is effectively increased and the heat exchange efficiency is improved.

[0032] See also Figure 6 In one possible embodiment, the first concave structure 9 is a plurality of waist-shaped grooves, and the second concave structure is a plurality of waist-shaped grooves. The first and second concave structures 9 are designed as waist-shaped grooves, which can also reduce the height of the heat exchange tube body 7 to a certain extent, allowing more groups of heat exchange tube bodies 7 to be arranged within the limited space inside the cooler tube shell body 1.

[0033] In summary, one end of the shell body 1 of the present invention is connected to an air inlet chamber 2, and the other end of the shell body 1 is connected to an air outlet chamber 3. A water inlet pipe 4 is provided on the side of the shell body 1 near the air inlet chamber 2, and a water outlet pipe 5 is provided on the side of the shell body 1 near the air outlet chamber 3. A heat exchange tube core 6 is provided inside the shell body 1, the inlet end of the heat exchange tube core 6 is connected to the air inlet chamber 2, and the outlet end of the heat exchange tube core 6 is connected to the air outlet chamber 3. The heat exchange tube core 6 includes a heat exchange tube body 7, and a heat exchange channel 8 is formed inside the heat exchange tube body 7. The upper surface of the heat exchange channel 8 is formed with a first concave structure 9, and the lower surface of the heat exchange channel 8 is formed with a second concave structure. The first concave structure 9 and the second concave structure 10 are staggered with each other. The first concave structure 9 and the second concave structure are designed to have a sinusoidal corrugation shape, that is, a corrugated fin shape. When the gas enters the heat exchange tube body 7, the presence of the corrugation reduces the flow velocity during the flow process, allowing sufficient heat exchange between the cold and hot media. Furthermore, the first concave structures 9 and the second concave structures on the upper and lower surfaces are staggered with each other so as to reduce the height of the heat exchange tube body 7, and more groups of heat exchange tube bodies 7 can be arranged inside the limited space of the cooler tube shell body 1. Multiple heat exchange tube bodies 7 are arranged inside the tube shell body 1 through the fixing plate 15, and at the same time, the external gaps of multiple heat exchange tube bodies 7 are connected to the water inlet pipe 4, so that the gas inside the air inlet chamber 2 and the external cooling water can fully exchange heat. The design of the first concave structure 9, the second concave structure, the first concave groove 11, and the second concave groove 12, on the one hand, improves the structural strength of the heat exchange tube body 7, and on the other hand, increases the surface area of the heat exchange tube body 7, thereby improving the heat exchange efficiency. The overall structure of the utility model is simple and has high stability; the heat exchange tubes do not contain fins and have a large number of groups, which is conducive to reducing the pressure loss on the gas side, effectively increasing the heat exchange area, and improving the heat exchange efficiency; it is more suitable for harsh working environments.

[0034] The above description of the present invention is relatively specific and detailed through a general explanation and specific embodiments. It should be understood that, based on the technical concept of the present invention, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the present invention, the technical solutions obtained by such conventional adjustments or further innovations also fall within the scope of protection of the claims of the present invention.

Claims

1. An EGR cooling device suitable for use in a harsh working environment, comprising a tube shell body (1), one end of the tube shell body (1) being connected to an air inlet chamber (2), and the other end of the tube shell body (1) being connected to an air outlet chamber (3); a water inlet pipe (4) being provided on the side of the tube shell body (1) near the air inlet chamber (2), and a water outlet pipe (5) being provided on the side of the tube shell body (1) near the air outlet chamber (3); a heat exchange tube core (6) being provided inside the tube shell body (1), an inlet end of the heat exchange tube core (6) being connected to the air inlet chamber (2), and an outlet end of the heat exchange tube core (6) being connected to the air outlet chamber (3); and characterized in that: The heat exchange tube core (6) comprises a heat exchange tube body (7), a heat exchange channel (8) is formed inside the heat exchange tube body (7), a first concave structure (9) is formed on the upper surface of the heat exchange channel (8), and a second concave structure is formed on the lower surface of the heat exchange channel (8); the first concave structure (9) and the second concave structure (10) are staggered with each other.

2. The EGR cooling device suitable for harsh working environments according to claim 1, characterized in that: The first concave structure (9) has a sinusoidal corrugation shape; the second concave structure has a sinusoidal corrugation shape.

3. The EGR cooling device suitable for harsh working environments according to claim 1, characterized in that: A plurality of first concave grooves (11) are distributed on the left side of the heat exchange channel (8); and a plurality of second concave grooves (12) are distributed on the right side of the heat exchange channel (8).

4. The EGR cooling device suitable for harsh working environments according to claim 1, characterized in that: The upper end of the tube shell body (1) is connected to a first mounting bracket (13), and the lower end of the tube shell body (1) is connected to a second mounting bracket (14).

5. The EGR cooling device suitable for harsh working environments according to claim 1, characterized in that: The number of the heat exchange tube bodies (7) is greater than one, and the ends of several of the heat exchange tube bodies (7) are connected with a fixing plate (15); The fixing plate (15) is formed with a through opening corresponding to the heat exchange tube body (7).

6. The EGR cooling device suitable for harsh working environments according to claim 1, characterized in that: The number of the first concave structures (9) formed on the upper surface of the heat exchange channel (8) is greater than one; The number of the second concave structures formed on the lower surface of the heat exchange channel (8) is greater than one.

7. The EGR cooling device suitable for harsh working environments according to claim 1, characterized in that: The first concave surface structure (9) is a plurality of waist-shaped grooves, and the second concave surface structure is a plurality of waist-shaped grooves.

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