Pipe belt type vacuum brazing core body

Abstract

The utility model relates to the technical field of fuel cell cooling systems, in particular to a pipe belt type vacuum brazing core body which is composed of protective plates, heat dissipation belts, single-side arc groove short sealing strips, two-side arc groove short sealing strips and Haver structure dotting cooling pipes, the protective plates are installed on the outermost sides of the two sides of the core body, the heat dissipation belts are tightly attached to the inner sides of the protective plates, and the heat dissipation belts are tightly attached to the outer sides of the protective plates. One-side arc groove short sealing strips are arranged at the two ends tightly attached to the protective plate heat dissipation belt, a Haver dotting cooling pipe is arranged tightly attached to the inner side of the heat dissipation belt, two side arc groove short sealing strips are arranged at the two ends of the Haver dotting cooling pipe, and the heat dissipation belt, the Haver structure dotting cooling pipe and the two side arc groove short sealing strips are sequentially arranged till the needed core width is achieved. And a complete pipe belt type structure core body is welded and formed through vacuum brazing. Compared with the prior art, the utility model has the advantages of low thermal side conductivity, high heat dissipation density, small volume and compact structure.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell cooling systems, and specifically relates to a tube-and-strip vacuum brazing core body. Background Art

[0002] Traditional vacuum brazing radiators are mainly applied to the cooling systems of vehicles with relatively harsh working conditions such as construction machinery, and heat exchange systems such as relatively large cooling towers. The vacuum brazing radiator core body is composed of a guard plate, a partition plate, a long seal, a traditional short seal, inner fins and a heat dissipation strip. Its main characteristics are that the product has high strength, the core body has no main sheet structure, and the size of the core body is not limited by the mold, and can be flexibly selected according to conditions such as heat exchange capacity requirements and installation space.

[0003] Due to the manufacturing process reasons of parts such as the partition plate, long and short seals, inner and outer fins of the traditional vacuum brazing core body, the cross-section of the hot side channel of the core body is relatively rough, and the heat exchange density (the ratio of heat exchange capacity to the frontal area) of the traditional vacuum brazing core body is relatively small. Therefore, the traditional vacuum brazing core body is only applicable to systems with large installation space, high strength requirements and low heat exchange density requirements.

[0004] Another remarkable feature of the vacuum brazing radiator is that the electrical conductivity of the hot side of the product is very low. After the vacuum brazing radiator is cleaned with deionized water, the electrical conductivity can be reduced to about 5 μs / cm within 24 hours, and after long-term storage, the electrical conductivity can still be maintained at a level below 20 μs / cm. While the electrical conductivity of a general continuous furnace brazing tube-and-strip radiator is extremely high, and after being cleaned with deionized water, the instantaneous electrical conductivity may be reduced to about 10 μs / cm. After storing for 24 hours, the electrical conductivity will return to a state close to that before cleaning, and the electrical conductivity reaches more than 1000 μs / cm. Therefore, the vacuum brazing radiator is applicable to cooling systems with very low electrical conductivity requirements.

[0005] In the field of cooling systems such as fuel cells that require low electrical conductivity, the requirement for the electrical conductivity of the coolant inside the radiator is extremely high, and the electrical conductivity must be controlled within the range of 5 μs / cm to 20 μs / cm. At the same time, the heat dissipation requirement is relatively large, and the installation space of the radiator is small. If a traditional vacuum brazing radiator is used, the heat dissipation performance is unqualified and the limited installation space requirement cannot be met. Summary of the Invention

[0006] In order to solve the problems that the heat dissipation performance of the traditional vacuum brazing radiator is unqualified and the limited installation space requirement cannot be met, the utility model provides a tube-and-strip vacuum brazing core body.

[0007] To achieve the above object, the technical solution adopted by the utility model is as follows: A tube-and-strip vacuum brazing core body, the constituent components of which are composed of a guard plate, heat dissipation strips, a single-sided arc groove short seal, double-sided arc groove short seals, and a Havr dot cooling tube. The structure and connection relationship of the constituent components are as follows: The guard plate is installed on the outermost sides of both sides of the core body, and the heat dissipation strips are on the inner side close to the guard plate. The two ends of the heat dissipation strips are single-sided arc groove short seals. The Havr dot cooling tube is on the inner side close to the heat dissipation strips. The two ends of the Havr dot cooling tube are double-sided arc groove short seals. After arranging the heat dissipation strips, the Havr structure dot cooling tube, and the double-sided arc groove short seals in sequence to the required core width, they are welded into a complete tube-and-strip structure core body by vacuum brazing.

[0008] The Havr dot cooling tube is composed of two half tubes. The horizontal pressing edges on the outer sides of the cross sections of each half tube are welded together to form a tubular cooling tube with both ends open. The edges of the horizontal pressing ends of the two half tubes are bent outward and brazed into a V-shaped groove. Molten solder accumulates in the V-shaped groove to form an additional weld seam on the outer side of the cooling tube, further enhancing the strength of the tube-and-strip vacuum brazing core body.

[0009] Convex platforms for increasing turbulent flow are formed on the inner wall of the Havr dot cooling tube.

[0010] The convex platforms for increasing turbulent flow are arranged in an array.

[0011] The single-sided arc groove short seal has a flat side without an arc groove, which is in close contact with the plane of the guard plate, and an arc groove in the middle on the other side, which is in line with the curvature of the half tube of the Havr dot cooling tube.

[0012] The double-sided arc groove short seal has an I-shaped structure, and the arc grooves in the middle of both sides of the short seal are in line with the curvature of the half tube of the Havr dot cooling tube.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The long seals and internal fins of the traditional vacuum brazing core body are cancelled, which can effectively reduce the material cost of the vacuum brazing core body, simplify the assembly process of the core body, and reduce the labor cost of product production.

[0015] 2. The core body has a large heat dissipation density and a small volume, and can be arranged in a narrow installation space.

[0016] 3. By adjusting the forming size of the half tube, the length of the flow cross-section of the cooling tube can be increased, and at the same time, the thickness of the flow cross-section can be reduced. Combined with the convex platforms for increasing turbulent flow on the cooling tube wall, it can achieve full contact between the coolant and the cooling tube wall and full heat exchange, improving the heat transfer density of the radiator core body.

[0017] 4. By forming the cross-sections of the half pipes 9 with different size specifications, radiator cores with different core thicknesses and different heat dissipation capacities can be produced, which can meet different installation space and different heat dissipation requirements. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a traditional vacuum brazed radiator.

[0019] Figure 2 is a schematic structural diagram of the tube-and-strip vacuum brazed core of the present invention.

[0020] Figure 3 is a structural diagram of the traditional short seal of the traditional vacuum brazed radiator.

[0021] Figure 4 is a schematic diagram of the single-sided arc groove short seal of the tube-and-strip vacuum brazed core of the present invention.

[0022] Figure 5 is a schematic diagram of the double-sided arc groove short seal of the tube-and-strip vacuum brazed core of the present invention.

[0023] Figure 6 is a schematic cross-sectional view of the half pipe of the Hafer dot cooling pipe of the present invention.

[0024] Figure 7 is a schematic cross-sectional view of the Hafer dot cooling pipe of the present invention composed of two half pipes.

[0025] Figure 8 is a partial schematic view of the external pattern of the half pipe of the Hafer dot cooling pipe of the present invention.

[0026] Figure 9 is a schematic view of the heat dissipation belt of the tube-and-strip vacuum brazed core of the present invention.

[0027] In the figure, the markings are: guard plate 1, heat dissipation belt 2, traditional short seal 3, long seal 4, partition plate 5, internal fin 6, single-sided arc groove short seal 7, double-sided arc groove short seal 8, half pipe 9, Hafer dot cooling pipe 10, V-shaped groove 11, convex platform 12 for increasing turbulence. Detailed Description of the Invention

[0028] The technical composition of the present invention will be further described in detail below with reference to the drawings and embodiments.

[0029] As Figure 2 shown, the tube-and-strip vacuum brazed core of the present invention is composed of a guard plate 1, a heat dissipation belt 2, a single-sided arc groove short seal 7, a double-sided arc groove short seal 8, and a Hafer dot cooling pipe 10. The specific structures and connection relationships of the components are as follows:

[0030] The said guard plate 1 is installed on the outermost sides of both sides of the core body, with the heat dissipation belt 2 closely attached to the inner side of the guard plate 1. Both ends of the heat dissipation belt 2 are single-sided arc groove short seals 7. Closely attached to the inner side of the heat dissipation belt 2 is the Hafer dotting cooling pipe 10. Both ends of the Hafer dotting cooling pipe 10 are double-sided arc groove short seals 8. After arranging the heat dissipation belt 2, the Hafer structure dotting cooling pipe 10, and the double-sided arc groove short seals 8 in sequence to the required core width, they are welded into a complete tube-and-strip structure core body through vacuum brazing.

[0031] As Figure 7 shown, the Hafer dotting cooling pipe 10 of the tube-and-strip radiator core body is composed of two half pipes 9. After vacuum brazing, the horizontal pressing and extending edges on the outer side of the transverse cross-section of each half pipe are welded together to form a tubular cooling pipe with both ends transparent. At the same time, the edge wings bent outwards at the ends of the horizontal pressing and extending edges of the two half pipes form a V-shaped groove 11 after brazing. As Figure 7 shown, the molten solder gathers in the V-shaped groove to form an additional weld seam on the outer side of the cooling pipe, further enhancing the strength of the tube-and-strip vacuum brazed core body.

[0032] Convex platforms 12 for increasing turbulent flow are formed on the inner wall of the said Hafer dotting cooling pipe.

[0033] The said single-sided arc groove short seal has a flat and arc-less groove on one side, which is closely attached to the guard plate plane. There is an arc groove 13 in the middle of the other side, which coincides with the radian of the half pipe of the Hafer dotting cooling pipe.

[0034] The said double-sided arc groove short seal has an I-shaped structure, and the arc grooves 13 in the middle of both sides of the short seal coincide with the radian of the half pipe of the Hafer dotting cooling pipe.

[0035] The working principle of the tube-and-strip vacuum brazed core body of the present utility model:

[0036] As Figure 2 shown, each Hafer structure dotting cooling pipe channel of the tube-and-strip vacuum brazed core body is composed of two half pipes 9. Through the combination of the two half pipes 9, it replaces the cooling pipe channel composed of two partitions, two long seals, and one inner fin, a total of five parts in traditional vacuum brazing. It simplifies the process, reduces the cost, and can also maintain the characteristics of high strength and small thermal-side electrical conductivity unique to vacuum brazing.

[0037] After brazing, the tube-and-fin vacuum brazing core forms an integral body with open pipe ends at both ends and sealed connections between the connected parts. After installation, when the engine is running, the high-temperature coolant is drained through a pipeline to one end of the tube-and-fin vacuum brazing core described in this new type. Under the pressure of the water pump, the high-temperature coolant evenly enters each cooling tube channel of the core, flows through the core, exits at the other end of the core, and converges into the return pipe, flowing back to the cylinder liner of the engine's cooling water circuit, forming a circulating loop of the engine cooling system. When the high-temperature and high-speed coolant flows through the array of turbulence-promoting protrusions inside the cooling tube, it turns into a high-speed turbulent state and makes full contact with the inner wall of the cooling tube channel. During the process of the high-temperature coolant making full contact with the inner wall of the cooling tube channel, the high-temperature coolant transfers heat to the cooling tube, and the cooling tube then transfers the heat to the outer cooling fins. The cooling fins then conduct sufficient heat exchange with the low-temperature air outside, completing the entire heat exchange process, achieving the cooling of the engine, and ensuring the normal operation of the engine.

[0038] For the tube-and-fin vacuum brazing core, by adjusting the forming dimensions of the half tube, the length of the flow-through cross-section of the cooling tube can be increased, while the thickness of the flow-through cross-section can be reduced. Together with the addition of turbulence-promoting protrusions on the cooling tube wall, it can achieve full contact between the coolant and the cooling tube wall and sufficient heat exchange, thus enhancing the heat transfer density of the radiator core.

[0039] For the tube-and-fin vacuum brazing core, by forming the cross-sections of the half tubes 9 with different size specifications, radiator cores with different core thicknesses and different heat dissipation capacities can be produced, which can meet different installation space and different heat dissipation requirements.

Claims

1. A tube-and-strip vacuum brazing core body is composed of a protective plate, heat dissipation strips, short sealing strips with single-sided arc grooves, short sealing strips with arc grooves on both sides, and Hafer dot cooling tubes, and is characterized in that The said guard plates are installed on the outermost sides of both sides of the core body. The heat dissipation belts are on the inner sides close to the guard plates. The two ends of the heat dissipation belts are single-sided arc groove short seals. The inner sides close to the heat dissipation belts are the Hafer dotting cooling pipes. The two ends of the Hafer dotting cooling pipes are double-sided arc groove short seals. After arranging the heat dissipation belts, the Hafer structure dotting cooling pipes, and the double-sided arc groove short seals in sequence to the required core width, they are welded into a complete tube-and-strip structure core body by vacuum brazing.

2. The tube-and-strip type vacuum brazing core body according to claim 1, wherein The said Hafer dotting cooling pipe is composed of two half pipes. The horizontal pressing edges on the outer sides of the transverse cross-sections of each half pipe are welded together to form a tubular cooling pipe with both ends open. The edge wings bent outwards at the ends of the horizontal pressing edges of the two half pipes are brazed into a V-shaped groove, and molten solder accumulates in the V-shaped groove to form an additional weld seam on the outer side of the cooling pipe.

3. The tube-and-strip vacuum brazing core according to claim 1, characterized in that, Convex platforms for increasing turbulent flow are formed on the inner wall of the said Hafer dotting cooling pipe.

4. The tube-and-strip type vacuum brazing core body according to claim 3, characterized in that, The said convex platforms for increasing turbulent flow are in an array form.

5. The tube-and-strip vacuum brazing core according to claim 1, characterized in that, The said single-sided arc groove short seal has a flat and non-arcuate groove on one side, which is in close contact with the guard plate plane, and a circular arc groove in the middle on the other side, which coincides with the radian of the half pipe of the Hafer dotting cooling pipe.

6. The tube-and-strip vacuum brazing core according to claim 1, wherein The said double-sided arc groove short seal is in an I-shaped structure, and the circular arc grooves in the middle of both sides of the short seal coincide with the radian of the half pipe of the Hafer dotting cooling pipe.

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