A sheet-type heat sink and a welding method

Abstract

The application discloses a sheet type radiator and a welding method. The sheet type radiator comprises a collecting pipe, radiating fins and a spoiler. The spoiler is welded on both sides of the radiating fin, and the length of the spoiler is equal to that of the radiating fin. The radiating fin is slidably connected with the collecting pipe through tile pipes, and the adjacent two tile pipes are clamped. The welding method is as follows: the two ends of the radiating fin are welded with the tile pipes respectively, the spoiler is welded with the radiating fin, and the two tile pipes on the outermost side are welded with the collecting pipe after the tile pipes are installed on the collecting pipe. Only one spoiler is welded on one side of each radiating fin, and the two ends of the spoiler are welded with the radiating fin. The welding area is small, the welding cost is reduced, the production efficiency is improved, the spoiler is welded with the radiating fin first, then the radiating fin is connected with the collecting pipe, the interval between the adjacent two radiating fins is not limited, the welding is convenient, the firmness of the welding mark can be easily detected, and the overall quality of the sheet type radiator is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of transformer radiator technology, and more specifically, to a plate radiator and a welding method. Background Technology

[0002] Plate-type radiators are heat exchange devices used in oil-immersed transformers and reactors, and are shaped like metal plates. Traditional plate-type radiators consist of multiple evenly spaced heat dissipation fins, all welded to a manifold. Each fin has an oil passage that connects vertically to the manifold. The manifold is divided into upper and lower sections. The hot cooling oil in the upper manifold undergoes heat exchange through the oil passage and flows into the lower manifold. The heat exchange of the cooling oil in the oil passage is achieved by cold air blown by a fan passing through adjacent heat dissipation fins.

[0003] Traditional radiators therefore have the following problems: the cold air blown out by the fan passes through the two heat sinks for a short time, and the air is mostly in a horizontal flow state, resulting in less heat being carried. A larger air volume needs to be blown out by the fan to achieve a better heat dissipation effect, which places higher demands on the fan and increases energy consumption accordingly.

[0004] Utility model patent CN201721776304.2 discloses an oil-immersed transformer heat sink with a turbulence-inducing device. It includes a heat sink body and multiple turbulence-inducing fins fixed to the air side of the heat sink body. The ends of the turbulence-inducing fins are connected in a hyperbolic shape. The longitudinal vortices generated by the turbulence-inducing fins disrupt the flow boundary layer formed when air flows through the heat sink, thereby enhancing convective heat transfer between the heat sink and the air. While this patent solves the problems of high fan requirements and low heat entrainment in traditional heat sinks, it still has the following drawbacks: the large number of turbulence-inducing fins and the small spacing between adjacent heat sinks result in a large welding area, increasing welding costs and difficulty, which is not conducive to large-scale production. Summary of the Invention

[0005] The technical problem to be solved by this invention is that there are many turbulence fins and the spacing between two adjacent heat sinks is small. Therefore, the welding area is large, which increases the welding cost and welding difficulty, and is not conducive to large-scale production. Therefore, this invention provides a plate heat sink and welding method that has a small welding area, reduces welding cost, reduces welding difficulty, and is conducive to large-scale production.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A plate-type heat sink includes a manifold, multiple heat sinks, and baffles. Each heat sink has a baffle fixedly connected to both sides, and the length of the baffle is equal to or slightly less than the length of the heat sink. The bottom of each heat sink is fixedly connected to a tube, which is slidably connected to the manifold and is snapped together with adjacent tubes.

[0008] Preferably, the baffle is disposed at the air inlet end of the heat sink, and the air outlet side of the baffle is inclined toward the adjacent heat sink.

[0009] Preferably, the baffle is disposed at the air outlet end of the heat sink, and the air inlet side of the baffle is inclined toward the adjacent heat sink.

[0010] Preferably, the spoiler is arc-shaped along its length.

[0011] Preferably, the two ends of the spoiler are bent to form two fixed feet, the fixed feet are fixedly connected to the heat sink, and a positioning element is provided at the connection between the fixed feet and the heat sink.

[0012] Preferably, the baffle plate located between two adjacent heat sinks is integrally formed in an I-shape.

[0013] Preferably, the distance between the baffle and the heat sink is 1 / 5 to 1 / 4 of the distance between two adjacent heat sinks.

[0014] Preferably, a groove is formed on the outer wall of the manifold along its axial direction, and both ends of the tube are bent inward and slidably connected to the groove.

[0015] Preferably, the bent portion of the tube forms a connecting part, and a spring washer is fitted onto the connecting part, which undergoes elastic deformation within the groove.

[0016] A welding method for a plate-type heat sink involves welding both ends of the heat sink to the heat pipes, welding both ends of the baffle plate to the upper and lower ends of the heat sink, and welding the two outermost heat pipes to the heat sink after the heat pipes are installed on the manifold.

[0017] The beneficial effects of this invention are: only one baffle is welded to one side of each heat sink, and the two ends of the baffle are welded to the heat sink. The welding area is small, which reduces welding costs and improves production efficiency. In addition, the baffle is welded to the heat sink first, and then the heat sink is connected to the manifold. It is not limited by the spacing between two adjacent heat sinks, and the welding is more convenient. At the same time, it is easy to check whether the weld is firm, which effectively improves the overall quality of the plate heat sink. Attached Figure Description

[0018] Figure 1 A schematic diagram of a plate-type heat sink Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the manifold;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of a roofing pipe;

[0022] Figure 5 A schematic diagram of a plate-type heat sink Figure 2 ;

[0023] Figure 6 This is a 3D view of the spoiler;

[0024] Figure 7 This is a cross-sectional view of the spoiler;

[0025] In the diagram: 1. Manifold; 11. Upper tube; 111. Slide groove; 112. Overflow groove; 12. Lower tube; 2. Heat sink; 3. Baffle plate; 4. Tile tube; 41. Through groove; 42. Sealing ring; 5. Spring washer. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0029] according to Figures 1 to 3As shown, a plate-type radiator includes a manifold 1, fins 2, baffles 3, tubes 4, and spring pads 5. Multiple fins 2 are arranged side-by-side at even intervals. Multiple baffles 3, tubes 4, and spring pads 5 are also arranged, and the number is twice the number of fins 2. The manifold 1 includes an upper tube 11 and a lower tube 12 with the same structure and size. The top of the fin 2 is connected to the upper tube 11 via tubes 4, and the bottom of the fin 2 is also connected to the lower tube 12 via tubes 4. A baffle 3 is welded to both sides of each fin 2. The baffles 3 located between adjacent fins 2 are integrally formed in an I-shape. The length of the baffle 3 is equal to or slightly less than the length of the fin 2. The tubes 4 are slidably connected to the manifold 1, and adjacent tubes 4 are interlocked.

[0030] Oil channels are provided on the heat sink 2, extending from the top to the bottom. The tube 4 is also provided with a through groove 41. When the heat sink 2 and the tube 4 are welded, the oil channels on the heat sink 2 are connected to the through groove 41 on the tube 4. Several oil ports are provided on the manifold 1 along its axial direction, and the number of oil ports is equal to the number of heat sink 2. A sealing ring 42 is provided on the inner side of the tube 4. The sealing ring 42 is installed at the position of the through groove 41 and is used to insert into the oil port to prevent oil leakage at the connection between the oil port and the through groove 41 when the tube 4 is installed on the manifold 1.

[0031] according to Figure 2-4 As shown, a groove 111 is formed on the outer wall of the manifold 1 along its axial direction. Both ends of the tube 4 are bent inward and slidably connected to the groove 111. The bent part of the tube 4 forms a connecting part, and a spring washer 5 is fitted on the connecting part. The spring washer 5 undergoes elastic deformation in the groove 111.

[0032] The cross-section of the spring pad 5 is U-shaped, and the two parallel ends of the spring pad 5 are corrugated (shown in the figure). The setting of the tube 4 facilitates the installation of the heat sink 2 on the manifold 1. The tube 4 is set in an arc shape, and the arc length of the tube 4 is slightly greater than half the circumference of the outer wall of the manifold 1. The tube 4 is made of spring steel material, which is elastic and has radial expansion and contraction force, so that the tube 4 can be better attached to the manifold 1. In addition, the setting of the spring pad 5 prevents the end of the tube 4 from shaking in the groove 111.

[0033] according to Figure 5-7As shown, the spoiler 3 is arc-shaped along its length. Both ends of the spoiler 3 are bent to form two fixed feet, which are fixedly connected to the heat sink 2. A positioning element is provided at the connection point between the fixed feet and the heat sink 2. One end of the positioning element is first fixedly connected to the heat sink 2, and the other end is inserted into a pre-drilled through hole in the spoiler 3. Because the spoiler 3 is irregularly shaped, aligning it in a specific position for welding is inconvenient. The positioning element facilitates pre-fixing the spoiler 3 to the heat sink 2, reducing welding difficulty. The spoiler 3 is located at the air inlet end of the heat sink 2, and the outer wall of the spoiler 3's outlet side is inclined towards the adjacent heat sink 2. The inner wall of the spoiler 3's air inlet side has an inclined surface that slopes towards the heat sink 2, guiding the airflow to the side wall of the heat sink 2, increasing the amount of air in contact with the outer wall of the heat sink 2, thereby achieving better heat exchange. Another implementation of the spoiler 3 is to be installed at the position of the heat sink 2. The spoiler 3 is installed at the air outlet end of the heat sink 2 (not shown in the figure). The outer wall of the air inlet side of the spoiler 3 is inclined towards the adjacent heat sink 2. It should be noted that in both implementations of the spoiler 3, the outer wall of the spoiler 3 is set in the shape of "(".

[0034] The distance between the baffle plate 3 and the heat sink 2 is 1 / 5 to 1 / 4 of the distance between two adjacent heat sinks 2. In this application, the distance between the baffle plate 3 and the heat sink 2 is 1 / 4 of the distance between two adjacent heat sinks 2. The baffle plate 3 between two adjacent heat sinks 2 is connected as a whole by a connecting plate. The two ends of the connecting plate can be fixedly connected to the baffle plate 3 by bolts, or by snap-fit, welding or riveting.

[0035] A welding method for a plate-type heat sink involves first welding both ends of the heat sink 2 to the heat pipe 4, then welding both ends of the baffle 3 to the upper and lower ends of the heat sink 2, and finally welding the two outermost heat pipes 4 to the heat pipe 1 after the heat pipe 4 is installed on the manifold 1.

[0036] Both ends of the chute 111 are provided with overflow grooves 112, which are connected to the chute 111. They are used to store welding liquid when the tile 4 is welded to the manifold 1. The welding liquid solidifies in the overflow groove 112, making the weld between the tile 4 and the manifold 1 more secure.

[0037] Combination Figure 1-7 As shown, each heat sink 2 has only one baffle 3 welded to one side. The two ends of the baffle 3 are welded to the heat sink 2. The welding area is small, which reduces welding costs and improves production efficiency. In addition, the baffle 3 is welded to the heat sink 2 first, and then the heat sink 2 is connected to the manifold 1. It is not limited by the spacing between two adjacent heat sinks 2, and the welding is more convenient. At the same time, it is easy to check whether the weld is firm, which effectively improves the overall quality of the plate heat sink.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A plate-type heat sink, comprising a manifold (1), a plurality of heat sinks (2), and a baffle plate (3), characterized in that: Each heat sink (2) is fixedly connected to a baffle plate (3) on both sides. The length of the baffle plate (3) is equal to or slightly less than the length of the heat sink (2). The bottom and bottom of each heat sink (2) are fixedly connected to a tube (4). The tube (4) is slidably connected to the collector tube (1), and adjacent tubes (4) are snapped together.

2. The plate-type heat sink according to claim 1, characterized in that: The baffle (3) is disposed at the air inlet end of the heat sink (2), and the air outlet side of the baffle (3) is inclined toward the adjacent heat sink (2).

3. The plate-type heat sink according to claim 1, characterized in that: The baffle (3) is disposed at the air outlet end of the heat sink (2), and the air inlet side of the baffle (3) is inclined toward the adjacent heat sink (2).

4. The plate-type heat sink according to any one of claims 1-3, characterized in that: The spoiler (3) is set to be arc-shaped along its length.

5. The plate-type heat sink according to claim 4, characterized in that: The two ends of the spoiler (3) are bent to form two fixed feet, which are fixedly connected to the heat sink (2), and a positioning element is provided at the connection between the fixed feet and the heat sink (2).

6. The plate-type heat sink according to claim 1, characterized in that: The outer wall of the manifold (1) is provided with a groove (111) along its axial direction. The two ends of the tile (4) are bent inward and slidably connected with the groove (111).

7. The plate-type heat sink according to claim 6, characterized in that: The bent portion of the tube (4) forms a connecting part, and the connecting part is fitted with a spring pad (5), which undergoes elastic deformation within the groove (111).

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