In-tube reinforced radiating tube fin type radiator

Abstract

The invention relates to the technical field of radiators, in particular to an in-tube reinforced radiating tube fin type radiator which comprises an upper sealing head, a core body and a lower sealing head. The core body comprises a mounting frame, a heat dissipation pipe and fins, the heat dissipation pipe and the fins are mounted in the mounting frame, the heat dissipation pipe and the fins are in expanded connection or brazed to form a hot side medium channel and a cold side medium channel, and convex spiral lines are arranged on the inner surface of the heat dissipation pipe; and both the upper sealing head and the lower sealing head are provided with medium conveying pipeline connecting interfaces. According to the in-tube reinforced radiating tube fin type radiator, by adopting a combined structure of the radiating tube and the fins, the complexity of the process is reduced, and the radiating efficiency is improved, so that the technical problems that in the prior art, when a plate fin type radiator is designed in an integral brazing mode, the process is complex, and the radiating efficiency of a tube fin type radiator is not high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of radiators, and in particular to a tube-fin type radiator with enhanced heat dissipation in the tube. Background Art

[0002] As a core support system for safe and efficient locomotive operation, heat dissipation technology for rail locomotives has evolved from simple air cooling in the early days to today's intelligent composite cooling systems, constantly adapting to the demands of higher power and more demanding environments. Rail transit traction systems often use centralized heat dissipation, using a heat transfer medium to concentrate heat from the heat source to a cooling tower and dissipate it into the atmosphere. Traditional cooling towers often use plate-fin radiators, which are integrally brazed designs that are complex, difficult to manufacture, and have high maintenance costs. Traditional tube-fin radiators, however, are limited by their structure and struggle to achieve the same heat dissipation efficiency as plate-fin radiators. Summary of the Invention

[0003] The present invention aims to provide a tube-fin radiator with enhanced heat dissipation in the tube, so as to solve the technical problems in the prior art of the plate-fin radiator being a monolithic brazed design, which has complicated processes and low heat dissipation efficiency. The specific technical solution is as follows: The present invention provides an in-tube enhanced heat dissipation tube-fin radiator, comprising an upper head, a core body and a lower head; the core body comprises a mounting frame, a heat dissipation tube and fins, the heat dissipation tube and the fins are mounted in the mounting frame, the heat dissipation tube and the fins are expanded or brazed to form a hot side medium channel and a cold side medium channel, the inner surface of the heat dissipation tube is provided with a convex spiral pattern; the upper head and the lower head are both provided with a medium delivery pipeline connection interface.

[0004] A further improvement of the tube-fin radiator with enhanced heat dissipation in the tube according to the present invention is that a partition is provided in the middle of the upper head for dividing the heat dissipation cavity into a liquid inlet cavity and a liquid outlet cavity.

[0005] A further improvement of the in-tube enhanced heat dissipation tube-fin radiator of the present invention is that a liquid inlet cavity flow field is formed in the liquid inlet cavity, and the liquid inlet cavity flow field includes a first flow velocity field and a second flow velocity field, and the flow velocity of the first flow velocity field is higher than the flow velocity of the second flow velocity field; the spiral tooth profile cross-section of the heat dissipation tube in the first flow velocity field is triangular, and the spiral tooth profile cross-section of the heat dissipation tube in the second flow velocity field is trapezoidal, the spiral tooth height of the heat dissipation tube in the first flow velocity field is lower than the spiral tooth height of the heat dissipation tube in the second flow velocity field, and the spiral angle of the heat dissipation tube in the first flow velocity field is greater than the spiral angle of the heat dissipation tube in the second flow velocity field.

[0006] The further improvement of the finned heat sink of the heat pipe with internal reinforcement lies in that a liquid outlet cavity flow field is formed in the liquid outlet cavity, the liquid outlet cavity flow field comprises a third flow velocity flow field and a fourth flow velocity flow field, the flow velocity of the third flow velocity flow field is higher than that of the fourth flow velocity flow field; the spiral tooth section of the heat pipe in the third flow velocity flow field is triangular, the spiral tooth section of the heat pipe in the fourth flow velocity flow field is trapezoidal, the tooth height of the heat pipe in the third flow velocity flow field is lower than that of the heat pipe in the fourth flow velocity flow field, and the spiral angle of the heat pipe in the third flow velocity flow field is greater than that of the heat pipe in the fourth flow velocity flow field.

[0007] The further improvement of the finned heat sink of the heat pipe with internal reinforcement lies in that the mounting frame comprises two pipe plates and two side guards, and the two pipe plates are fixed to the two ends of the two side guards respectively.

[0008] The further improvement of the finned heat sink of the heat pipe with internal reinforcement lies in that the lower head of the upper head is provided with a sealing groove opposite to one side of the core body, and a sealing ring is arranged in the sealing groove.

[0009] The further improvement of the finned heat sink of the heat pipe with internal reinforcement lies in that the material of the sealing ring is fluorosilicone rubber.

[0010] The further improvement of the finned heat sink of the heat pipe with internal reinforcement lies in that a sealing gasket is arranged between the mounting frame and the lower sealing plate.

[0011] The technical scheme of the present application has the following beneficial effects: The finned heat sink of the heat pipe with internal reinforcement has the following beneficial effects: the combination structure of the heat pipe and the fin reduces the complexity of the process and improves the heat dissipation efficiency, thereby solving the technical problems that the plate-fin heat sink is designed as an integral brazing type in the prior art, and the heat dissipation efficiency of the tube-fin heat sink is not high. The present application is different from the symmetrical shunt structure of the traditional heat dissipation, the return flow is divided into different flow fields by arranging the partition plate, the flow area of different flow fields is designed to control the flow velocity. For high viscosity medium, low tooth height screw pipe or smooth pipe is used in the high flow velocity area, and high tooth height screw pipe is used in the low flow velocity area, so as to increase the fluid disturbance and improve the heat exchange coefficient. The arrangement of the pipelines in different flow fields improves the overall heat exchange efficiency of the heat sink under the premise of reducing the influence on the overall flow resistance.

[0012] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in Figure 1 is a schematic diagram of the overall structure of the finned heat sink of the heat pipe with enhanced heat dissipation in the tube according to the present application; Figure 2 is a schematic diagram of the structure of the upper head of the finned heat sink of the heat pipe with enhanced heat dissipation in the tube according to the present application; Figure 3 is a schematic diagram of the flow field in the core of the finned heat sink of the heat pipe with enhanced heat dissipation in the tube according to the present application; Figure 4 is a schematic diagram of the structure of the core of the finned heat sink of the heat pipe with enhanced heat dissipation in the tube according to the present application; Figure 5 is a partial sectional view of the heat dissipation pipe of the finned heat sink of the heat pipe with enhanced heat dissipation in the tube according to the present application.

[0014] wherein 1, upper head; 101, liquid inlet cavity; 102, partition; 103, liquid outlet cavity; 2, sealing gasket; 3, core; 301, first flow rate flow field; 302, second flow rate flow field; 303, liquid inlet cavity flow field; 304, third flow rate flow field; 305, fourth flow rate flow field; 306, liquid outlet cavity flow field; 307, side guard; 308, heat dissipation pipe; 309, fin; 310, tube plate; 4, lower head. DETAILED DESCRIPTION

[0015] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0016] Referring to Figures 1-5 shown, a finned heat sink of a heat pipe with enhanced heat dissipation in the tube, comprising an upper head 1, a core 3 and a lower head 4; the core 3 comprises a mounting frame, heat dissipation pipes 308 and fins 309, the heat dissipation pipes 308 and the fins 309 are mounted in the mounting frame, the heat dissipation pipes 308 and the fins 309 are expanded or brazed to form hot-side medium channels and cold-side medium channels, the inner surface of the heat dissipation pipes 308 is provided with convex spiral grooves; the upper head 1 and the lower head 4 are both provided with medium conveying pipe connection interfaces.

[0017] The finned heat sink of the application has the characteristics of high heat dissipation efficiency, light weight, low maintenance difficulty and low maintenance cost, solves the problem that the internal heat of the traditional finned heat sink cannot be taken out due to insufficient area in the pipe, and through different turbulence pipe layout in different flow field velocity areas, the overall heat transfer coefficient is improved while the influence of flow resistance is reduced as much as possible. Through the design of the inner surface texture of the heat dissipation, the heat dissipation is strengthened, and the cost is lower than other strengthening methods. The core body 3 can be a single-layer core body 3, or can be combined to form a two-layer or multi-layer composite heat dissipation core body 3 according to the heat dissipation power required by the heat generating component and the temperature gradient of the heat dissipation medium. The hot side medium channel and the cold side medium channel are isolated from each other, and heat exchange is carried out through metal heat conduction. The medium in the hot side medium channel and the cold side medium channel of the core body 3 can be exchanged, and through the inner strengthening design (spiral structure design) of the heat dissipation pipe 308, the core body 3 can not only cool the high specific heat capacity medium side, but also can heat the low specific heat capacity medium side through medium exchange, to meet the exchange requirements of different environments. In the embodiment, the upper end cover 1 and the lower end cover 4 can be made of aluminum alloy and stainless steel by casting and welding.

[0018] The upper end cover 1 and the lower end cover 4 can be divided into different isolated chambers according to the heat dissipation requirements, and different media can flow through each chamber. In the embodiment, the middle part of the upper end cover 1 is provided with a partition plate 102 for dividing the heat dissipation chamber into a liquid inlet chamber 101 and a liquid outlet chamber 103. The medium is guided to flow back to improve the heat dissipation efficiency. According to the heat dissipation requirements, the medium flow rate can be controlled by the arrangement position of the partition plate 102, and the overall heat transfer coefficient is improved and the influence of fluid flow resistance is reduced by the combination of the texture design (spiral structure design) of the heat dissipation pipe 308 and the convex spiral texture design (spiral structure design) in different areas.

[0019] The cold side medium of the heat sink flows into the core body 3 from below and flows out from above. The hot side medium flows into the liquid inlet chamber 101 of the upper end cover 1, flows through the heat dissipation pipe 308 and the lower end cover 4, and then flows through the heat dissipation pipe 308 to the liquid outlet chamber 103 of the upper end cover 1. The two kinds of media exchange heat at the heat dissipation pipe 308 and the fin 309 to realize heat dissipation of the heat generating component.

[0020] The heat dissipation pipe 308 is designed with convex spiral texture on the inner surface to increase the heat exchange area, and the vortex disturbance of the medium is generated by the texture to drive the downstream fluid to rotate and wash the wall surface and drive the radial flow, thereby improving the heat transfer coefficient by destroying the thermal boundary layer.

[0021] In the design method of the traditional finned heat sink, the heat exchange area of the hot side is insufficient due to the limitation of the structure form, and the internal insert is often used to disturb the fluid in the pipe to improve the Nusselt number of the fluid in the pipe. However, this method has a greater influence on the overall flow resistance of the heat sink, and the influence on the flow resistance is much greater than the improvement of the heat transfer coefficient for high viscosity medium or high flow rate working condition.

[0022] The physical parameters of different media and the specific thermal requirements of the heat sink product can be adapted to the heat dissipation requirements of different media by setting the tooth profile, tooth height, spiral angle and pitch of the convex thread. Under the premise of reducing the influence on the flow resistance, the heat exchange coefficient is as high as possible.

[0023] In this embodiment, the liquid inlet cavity 101 forms a liquid inlet cavity flow field 303, which includes a first flow rate flow field 301 and a second flow rate flow field 302. The flow rate of the first flow rate flow field 301 is higher than that of the second flow rate flow field 302. The spiral tooth profile cross section of the heat dissipation pipe 308 in the first flow rate flow field 301 is triangular, the spiral tooth profile cross section of the heat dissipation pipe 308 in the second flow rate flow field 302 is trapezoidal, the spiral tooth height of the heat dissipation pipe 308 in the first flow rate flow field 301 is lower than that of the heat dissipation pipe 308 in the second flow rate flow field 302, and the spiral angle of the heat dissipation pipe 308 in the first flow rate flow field 301 is greater than that of the heat dissipation pipe 308 in the second flow rate flow field 302.

[0024] As shown in Figure 3 and Figure 5 Unlike the symmetrical flow splitting structure of traditional heat dissipation, the present application adjusts the position of the partition plate 102 to divide the liquid inlet cavity 101 and the liquid outlet cavity 103 into unequal cross-sectional areas, so as to control the flow rate. Low tooth height (tooth height between 0.05-0.15mm) threaded pipe or smooth pipe is used in small area, and high tooth height (tooth height between 0.2-0.3mm) threaded pipe is used in large area, to increase fluid disturbance and improve heat exchange coefficient. By arranging different flow field pipes, the overall heat exchange efficiency of the heat sink is improved under the premise of reducing the influence on the overall flow resistance.

[0025] Preferably, the liquid outlet cavity 103 forms a liquid outlet cavity flow field 306, which includes a third flow rate flow field 304 and a fourth flow rate flow field 305. The flow rate of the third flow rate flow field 304 is higher than that of the fourth flow rate flow field 305. The spiral tooth profile cross section of the heat dissipation pipe 308 in the third flow rate flow field 304 is triangular, the spiral tooth profile cross section of the heat dissipation pipe 308 in the fourth flow rate flow field 305 is trapezoidal, the spiral tooth height of the heat dissipation pipe 308 in the third flow rate flow field 304 is lower than that of the heat dissipation pipe 308 in the fourth flow rate flow field 305, and the spiral angle of the heat dissipation pipe 308 in the third flow rate flow field 304 is greater than that of the heat dissipation pipe 308 in the fourth flow rate flow field 305.

[0026] Specifically, for the radiator inlet cavity flow field 303, different types of threaded heat dissipation pipes 308 or light pipe + insert turbulences are arranged in different areas. Due to the resistance effect caused by the convex surface turbulence, the first flow rate flow field 301 and the second flow rate flow field 302 are formed due to the Bernoulli effect. The first flow rate flow field 301 is preferably a threaded pipe with low tooth height (tooth height between 0.05-0.15mm), triangular tooth section, and 15°-20° helix angle, which has small flow resistance effect and high flow rate (flow rate above 2m / s), large Reynolds number, easy to generate turbulence, and high heat exchange coefficient. The second flow rate flow field 302 is preferably a threaded pipe with high tooth height (tooth height between 0.2-0.3mm), trapezoidal tooth section, and 6°-13° helix angle, which has small Reynolds number at low flow rate (flow rate between 1-2m / s), fluid impact on the tooth surface forms axial vortex, and increases the heat exchange coefficient. For the radiator with high heat exchange power requirement and large flow resistance margin, the second flow rate flow field 302 can use light pipe + insert to enhance the turbulence effect and further improve the heat exchange coefficient.

[0027] For the outlet cavity flow field of the radiator, the same as the inlet cavity flow field 303, different parameters of convex threaded pipes are arranged in different areas to form the third flow rate flow field 304 and the fourth flow rate flow field 305. It should be noted that when the flow field is distributed, the resistance design of the radiator inlet flow process and the outlet flow process should be as close as possible to reduce the overall flow resistance of the radiator.

[0028] Preferably, as shown in Figure 1 and Figure 4 , the mounting frame includes two pipe plates 310 and two side guards 307, and the two pipe plates 310 are fixed to the two ends of the two side guards 307, respectively. The mounting frame is used to protect the fins 309 and support the overall radiator.

[0029] Preferably, as shown in Figure 2 , the lower head 4 of the upper head 1 is provided with a sealing groove on one side of the core 3, and a sealing ring is arranged in the sealing groove.

[0030] Preferably, the material of the sealing ring is fluorosilicone rubber. Fluorosilicone rubber is a sealing material with oil resistance and high and low temperature resistance, which can ensure the sealing of the upper head 1 and the lower head 4 and the core 3. According to the requirements of the use environment, suitable materials can be used for replacement.

[0031] Preferably, as shown in Figure 1 , a sealing gasket 2 is arranged between the mounting frame and the lower sealing plate, which can further improve the sealing between the mounting frame and the lower sealing plate.

[0032] The finned heat sink of the inner-strengthened heat pipe solves the technical problems of the complicated process of the plate-fin heat sink and the low heat dissipation efficiency of the tube-fin heat sink in the prior art by adopting the combined structure of the heat pipe 308 and the fin 309, thereby reducing the complexity of the process and improving the heat dissipation efficiency.

[0033] The above description is only the preferred embodiments of the present application and is not used to limit the present application. The present application can be variously changed and altered for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tube-fin radiator with enhanced heat dissipation in the tube, characterized in that: The invention comprises an upper end cap (1), a core body (3) and a lower end cap (4); the core body (3) comprises a mounting frame, a heat dissipation pipe (308) and fins (309); the heat dissipation pipe (308) and the fins (309) are mounted in the mounting frame; the heat dissipation pipe (308) and the fins (309) are expanded or brazed to form a hot side medium channel and a cold side medium channel; the inner surface of the heat dissipation pipe (308) is provided with a convex spiral pattern; the upper end cap (1) and the lower end cap (4) are both provided with a medium delivery pipeline connection interface.

2. The tube-fin radiator with enhanced heat dissipation in the tube according to claim 1, characterized in that: A partition (102) is provided in the middle of the upper head (1) for dividing the heat dissipation cavity into a liquid inlet cavity (101) and a liquid outlet cavity (103).

3. The tube-fin radiator with enhanced heat dissipation in the tube according to claim 2, characterized in that: A liquid inlet cavity flow field (303) is formed in the liquid inlet cavity (101), and the liquid inlet cavity flow field (303) includes a first flow velocity field (301) and a second flow velocity field (302), wherein the flow velocity of the first flow velocity field (301) is higher than the flow velocity of the second flow velocity field (302); the spiral tooth profile cross section of the heat dissipation pipe (308) in the first flow velocity field (301) is triangular, and the spiral tooth profile cross section of the heat dissipation pipe (308) in the second flow velocity field (302) is trapezoidal; the spiral tooth height of the heat dissipation pipe (308) in the first flow velocity field (301) is lower than the spiral tooth height of the heat dissipation pipe (308) in the second flow velocity field (302); and the spiral angle of the heat dissipation pipe (308) in the first flow velocity field (301) is greater than the spiral angle of the heat dissipation pipe (308) in the second flow velocity field (302).

4. The tube-fin radiator with enhanced heat dissipation in the tube according to claim 2, characterized in that: A liquid outlet cavity flow field (306) is formed in the liquid outlet cavity (103), and the liquid outlet cavity flow field (306) includes a third flow velocity flow field (304) and a fourth flow velocity flow field (305). The flow velocity of the third flow velocity flow field (304) is higher than the flow velocity of the fourth flow velocity flow field (305). The spiral tooth profile cross section of the heat dissipation pipe (308) in the third flow velocity flow field (304) is triangular, and the spiral tooth profile cross section of the heat dissipation pipe (308) in the fourth flow velocity flow field (305) is trapezoidal. The spiral tooth height of the heat dissipation pipe (308) in the third flow velocity flow field (304) is lower than the spiral tooth height of the heat dissipation pipe (308) in the fourth flow velocity flow field (305). The spiral angle of the heat dissipation pipe (308) in the third flow velocity flow field (304) is greater than the spiral angle of the heat dissipation pipe (308) in the fourth flow velocity flow field (305).

5. The tube-fin radiator with enhanced heat dissipation in the tube according to claim 1, characterized in that: The installation frame comprises two tube sheets (310) and two side guards (307), and the two tube sheets (310) are respectively fixed to the two ends of the two side guards (307).

6. The tube-fin radiator with enhanced heat dissipation in the tube according to claim 1, characterized in that: A sealing groove is provided on one side of the lower sealing head (4) of the upper sealing head (1) facing the core body (3), and a sealing ring is provided in the sealing groove.

7. The tube-fin radiator with enhanced heat dissipation in the tube according to claim 6, characterized in that: The material of the sealing ring is fluorosilicone rubber.

8. The tube-fin radiator with enhanced heat dissipation in the tube according to claim 1, characterized in that: A sealing gasket (2) is provided between the mounting frame and the lower sealing plate.

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