Variable cross-section fractal channel structure of micro-channel aluminum flat tube

Abstract

The utility model relates to the technical field of micro-channel aluminum flat pipes, and discloses a micro-channel aluminum flat pipe variable cross-section fractal channel structure which comprises a pipe body, a plurality of flow dividing channels are formed in the pipe body at equal intervals, a plurality of air holes are formed in the front side of the top wall of the pipe body at equal intervals, a first sliding groove is formed in the rear side of the inner wall of each air hole, and a second sliding groove is formed in the rear side of the inner wall of each air hole. A first spring is installed on the inner bottom wall of the first sliding groove, a connecting block is installed at the top end of the first spring, a rotating disc is fixedly connected to the right side of the connecting block, a plurality of first circular grooves are formed in the pipe body at equal intervals, and the rotating disc is in sliding connection with the first circular grooves. According to the utility model, the movement of the turntable drives the closing blade to move through the sliding chute II and the sliding block, and meanwhile, the sliding column II slides in the sliding chute III of the disc, so that the linkage of the disc and the combined movement of the closing blade adjust the sectional area of the shunting channel, a self-adaptive variable cross-section fractal flow path is formed, the fluid distribution and heat transfer efficiency are optimized, and the fluid resistance is reduced.

Description

Technical Field

[0001] This utility model relates to the field of microchannel aluminum flat tube technology, and in particular to a microchannel aluminum flat tube variable cross-section fractal channel structure. Background Technology

[0002] Microchannel aluminum flat tubes are thin-walled, porous, flat tubular materials made from refined aluminum rods through hot extrusion and surface zinc spraying for corrosion protection. They are widely used in evaporators and condensers in automotive air conditioning systems. Compared with traditional copper and aluminum tubes, they have better heat conduction performance, can cool quickly, and can also reduce system weight and space occupation.

[0003] Existing microchannel aluminum flat tubes contain multiple microchannels, increasing the contact area between the fluid and the tube wall and enabling more efficient heat transfer. However, the channel shapes of microchannel aluminum flat tubes are relatively regular, such as square or circular, which cannot fully adapt to complex fluid flow characteristics and heat exchange requirements. Existing technology borrows from the hierarchical diffusion pattern of plant leaf veins from the main vein to the branch veins and then to the microvein, making the channel structure exhibit fractal characteristics. This structure helps the fluid to be evenly distributed and efficiently transported within the tube. However, although the original intention of the variable cross-section fractal channel structure was to improve the heat transfer effect, the irregular shape of the fractal channel will cause more local resistance to the fluid during flow. Compared with traditional regular channels, fractal channels have more corners, contraction and expansion areas. The fluid will experience violent flow separation and vortex phenomena in these places, resulting in an increase in the local resistance coefficient. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a microchannel aluminum flat tube variable cross-section fractal channel structure, which aims to improve the problem that existing fractal channels have more corners, contraction and expansion areas, resulting in an increase in the local resistance coefficient.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a microchannel aluminum flat tube with variable cross-section fractal channel structure, comprising a tube body, wherein multiple diversion channels are equidistantly arranged inside the tube body, multiple air holes are equidistantly arranged on the front side of the top wall of the tube body, a sliding groove is formed on the rear side of the inner wall of the air holes, a spring is installed on the inner bottom wall of the sliding groove, a connecting block is installed on the top of the spring, a turntable is fixedly connected to the right side of the connecting block, and multiple circular grooves are equidistantly arranged inside the tube body, wherein the turntable and the circular grooves are connected... The rotary table has a sliding connection. Multiple sliding grooves (II) are equidistantly spaced on the rear side of its outer wall. A slider is slidably connected to the inner wall of each sliding groove (II). A closing leaf is fixedly connected to the rear side of the outer wall of the slider. A sliding column (II) is fixedly connected to the rear side of the outer wall of the closing leaf. A disc is located on the rear side of the rotary table's outer wall. Multiple sliding grooves (III) are equidistantly spaced on the front side of the disc's outer wall. These grooves (III) are slidably connected to the sliding columns (II). Multiple anti-clogging mechanisms are equidistantly spaced on the front side of the top wall of the pipe body. These anti-clogging mechanisms are used to prevent the risk of blockage and scaling in the diversion channel.

[0006] As a further description of the above technical solution:

[0007] The anti-clogging mechanism includes a circular groove 2, which is equidistantly located on the front side of the outer wall of the pipe body. A filter screen is installed inside the circular groove 2. The filter screen has a slot on both the left and right sides of its outer wall. A sliding groove 4 is provided on both the left and right sides of the inner wall of the circular groove 2. A spring 2 is installed on the bottom wall of the sliding groove 4. A sliding column 1 is fixedly connected to the top of the spring 2. The sliding column 1 engages with the slot. A sliding groove 5 is provided on the front side of the inner wall of the sliding groove 4.

[0008] As a further description of the above technical solution:

[0009] The outer wall of the pipe is fitted with an anti-corrosion layer.

[0010] As a further description of the above technical solution:

[0011] The upper and lower ends of the front side of the outer wall of the filter screen are fixedly connected with fasteners.

[0012] As a further description of the above technical solution:

[0013] A pressure block is fixedly connected to the front side of the outer wall of the sliding column one, and the pressure block is slidably connected to the sliding groove four.

[0014] As a further description of the above technical solution:

[0015] The top wall of the pressure block is equipped with an anti-slip pad.

[0016] As a further description of the above technical solution:

[0017] Mounting holes are provided at the four corners of the front side of the outer wall of the tube.

[0018] As a further description of the above technical solution:

[0019] The inner wall of the mounting hole is threaded with a bolt.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, when the external fluid pressure increases, the pressure acts on the connecting block through the air hole, compressing the first spring and pushing the connecting block to squeeze the turntable to slide and rotate in the first circular groove. The movement of the turntable drives the closing leaf to move through the second sliding groove and the slider. At the same time, the second sliding column slides in the third sliding groove of the disc, so that the discs are linked. The combined movement of the closing leaf adjusts the cross-sectional area of ​​the diversion channel, forming an adaptive variable cross-section fractal flow path, optimizing fluid distribution and heat transfer efficiency, and reducing fluid resistance.

[0022] 2. In this utility model, the filter screen is slid into the second circular groove, and the first sliding column is squeezed to compress the second spring. After the filter screen is fully inserted, the second spring pushes the first sliding column to engage with the slot and fix it in the second circular groove. This filters the fluid and intercepts impurities to avoid clogging the diversion channel. When cleaning or replacing the filter screen, the pressure block is pressed down to make the first sliding column slide down and disengage from the slot, making it easy to remove the filter screen. Attached Figure Description

[0023] Figure 1 This is a front view of a microchannel aluminum flat tube variable cross-section fractal channel structure proposed in this utility model;

[0024] Figure 2 This is a three-dimensional view of a microchannel aluminum flat tube with variable cross-section fractal channel structure proposed in this utility model;

[0025] Figure 3 This is a partial structural cross-sectional view of a microchannel aluminum flat tube with variable cross-section fractal channel structure proposed in this utility model;

[0026] Figure 4 This is a partial exploded view of the microchannel aluminum flat tube variable cross-section fractal channel structure proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the anti-clogging mechanism of a microchannel aluminum flat tube variable cross-section fractal channel structure proposed in this utility model.

[0028] Legend:

[0029] 1. Pipe body; 2. Anti-clogging mechanism; 201. Circular groove two; 202. Filter screen; 203. Slot; 204. Slide four; 205. Spring two; 206. Slide column one; 207. Slide five; 3. Diversion channel; 4. Air hole; 5. Slide column one; 6. Spring one; 7. Connecting block; 8. Turntable; 9. Circular groove one; 10. Slide column two; 11. Sliding block; 12. Closing leaf; 13. Disc; 14. Slide column three; 15. Anti-corrosion layer; 16. Fastening block; 17. Pressure block; 18. Anti-slip pad; 19. Mounting hole; 20. Bolt; 21. Slide column two. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a microchannel aluminum flat tube with variable cross-section fractal channel structure, including a tube body 1. Multiple diversion channels 3 are equidistantly arranged inside the tube body 1. The diversion channels 3 are used to allow fluid to flow more uniformly within the tube body 1, avoiding situations where the local flow rate is too high or too low, which is beneficial for improving heat exchange efficiency or the stability and uniformity of other processes. Multiple air holes 4 are equidistantly arranged on the front side of the top wall of the tube body 1. A sliding groove 5 is formed on the rear side of the inner wall of the air holes 4. A spring 6 is installed on the inner bottom wall of the sliding groove 5 for resetting. A connecting block 7 is installed at the top of the spring 6. The air holes 4 act on the connecting block 7. A turntable 8 is fixedly connected to the right side of the connecting block 7. Multiple circular grooves 9 are equidistantly arranged inside the tube body 1. The turntable 8 is slidably connected to the circular grooves 9. The connecting block 7 drives the turntable 8 to slide and rotate within the circular grooves 9. Multiple sliding grooves 10 are equidistantly arranged on the rear side of the outer wall of the turntable 8. The inner wall of the second 10 is slidably connected to a slider 11, and the rear side of the outer wall of the slider 11 is fixedly connected to a closing leaf 12. The movement of the turntable 8 drives the closing leaf 12 to move through the second 10 and the slider 11. The rear side of the outer wall of the closing leaf 12 is fixedly connected to a sliding column 21. The rear side of the outer wall of the turntable 8 is provided with a disc 13. The front side of the outer wall of the disc 13 is provided with multiple sliding grooves 3 14 at equal intervals. The sliding grooves 3 14 are slidably connected to the sliding column 21. At the same time, the sliding column 21 slides in the sliding grooves 3 14 of the disc 13, so that the disc 13 is linked. The combined movement of the closing leaf 12 realizes the adjustment of the cross-sectional area of ​​the diversion channel 3. Multiple anti-blocking mechanisms 2 are provided at equal intervals on the front side of the top wall of the pipe body 1. The anti-blocking mechanisms 2 are used to prevent the diversion channel 3 from being blocked and scaled. The outer wall of the pipe body 1 is installed with an anti-corrosion layer 15. The anti-corrosion layer 15 is used to isolate the pipe body 1 from external corrosive substances, avoid the aluminum flat pipe from being directly corroded, and thus extend its service life.

[0032] Specifically, when the external fluid pressure of the pipe body 1 is high, the pressure acts on the connecting block 7 through the air hole 4, causing the connecting block 7 to squeeze the spring 6. At the same time, the connecting block 7 drives the turntable 8 to slide and rotate in the circular groove 9. The movement of the turntable 8 is transmitted to the slider 11 through the sliding groove 10, which drives the closing leaf 12 to move. Meanwhile, the sliding column 21 slides in the sliding groove 14 of the circular disk 13, causing the circular disk 13 to move in conjunction. The combined movement of the closing leaf 12 realizes the adjustment of the cross-sectional area of ​​the diversion channel 3, forming an adaptive variable cross-section fractal flow path, thereby optimizing the fluid distribution and heat transfer efficiency. Multiple anti-clogging mechanisms 2 are equidistantly arranged on the front side of the top wall of the pipe body 1. The anti-clogging mechanisms 2 are used to prevent the diversion channel 3 from being blocked and scaled. The anti-corrosion layer 15 is used to isolate the pipe body 1 from external corrosive substances, avoiding direct corrosion of the aluminum flat tube, thereby extending its service life.

[0033] Reference Figure 2and Figure 5 The anti-clogging mechanism 2 includes a second circular groove 201, which is equidistantly located on the front side of the outer wall of the pipe body 1. A filter screen 202 is installed inside the second circular groove 201. The filter screen 202 has slots 203 on both the left and right sides of its outer wall. A fourth sliding groove 204 is provided on both the left and right sides of the inner wall of the second circular groove 201. A second spring 205 is installed on the bottom wall of the fourth sliding groove 204. A first sliding column 206 is fixedly connected to the top of the second spring 205, and the first sliding column 206 engages with the slots 203. A fifth sliding groove 207 is provided on the front side of the inner wall of the fourth sliding groove 204. The upper and lower ends of the front side of the outer wall of the filter screen 202 are fixedly connected with buckles 16. Buckles 16 are used to pick up or place the filter screen 202 more conveniently, making the operation process more convenient and stable, and at the same time avoiding direct contact with the filter screen 202 to prevent damage or contamination. The front side of the outer wall of the slide column 1 206 is fixedly connected with a pressure block 17. The pressure block 17 is slidably connected to the slide groove 4 204. The pressure block 17 is used to easily press down the slide column 1 206. The top wall of the pressure block 17 is equipped with an anti-slip pad 18 to prevent fingers from sliding on the surface of the pressure block 17.

[0034] Specifically, the filter screen 202 is inserted into the second circular groove 201. The filter screen 202 presses against the first sliding post 206 in the fourth sliding groove 204, causing it to move downwards and compress the second spring 205. When the filter screen 202 is fully embedded in the second circular groove 201, the second spring 205 pushes the first sliding post 206, causing it to engage with the slot 203, thereby ensuring that the filter screen 202 is securely installed in the second circular groove 201. This filter screen 202 is responsible for filtering the fluid flowing into the pipe body 1, intercepting impurities to avoid diversion of the flow channel 3. If the filter screen 202 becomes clogged and needs cleaning or replacement, press down on the pressure block 17 to allow the sliding column 206 to slide down within the sliding groove 207, thus disengaging from the slot 203 and facilitating the removal of the filter screen 202. The latch block 16 is used to more easily pick up or place the filter screen 202, making the operation more convenient and stable, while also preventing direct contact with the filter screen 202 from causing damage or contamination. The pressure block 17 is used to easily press down the sliding column 206, and the anti-slip pad 18 is used to prevent fingers from sliding on the surface of the pressure block 17.

[0035] Reference Figure 1 and Figure 2 Mounting holes 19 are provided at the four corners of the front side of the outer wall of the pipe body 1. The mounting holes 19 are used to ensure that the bolts 20 can be accurately connected to the pipe body 1, ensuring the stability and consistency of the connection. The inner wall of the mounting holes 19 is threaded with bolts 20. The bolts 20 are used to tightly pull the pipe body 1 together with other components that need to be connected, to achieve a firm mechanical connection, and to ensure that the pipe body 1 will not loosen or shift during operation.

[0036] Specifically, the mounting hole 19 is used to ensure that the bolt 20 can be accurately connected to the pipe body 1, ensuring the stability and consistency of the connection. The bolt 20 is used to tightly pull the pipe body 1 together with other components that need to be connected, achieving a firm mechanical connection and ensuring that the pipe body 1 will not loosen or shift during operation.

[0037] Working principle: When the external fluid pressure of the pipe body 1 is large, the pressure acts on the connecting block 7 through the air hole 4, causing the connecting block 7 to squeeze the spring 6. At the same time, the connecting block 7 drives the turntable 8 to slide and rotate in the circular groove 9. The movement of the turntable 8 drives the closing leaf 12 to move through the sliding groove 10 and the slider 11. At the same time, the sliding column 21 slides in the sliding groove 14 of the disc 13, so that the disc 13 is linked. The combined movement of the closing leaf 12 realizes the adjustment of the cross-sectional area of ​​the diversion channel 3, forming an adaptive variable cross-section fractal flow path, thereby optimizing the fluid distribution and heat transfer efficiency.

[0038] The filter screen 202 is slid into the second circular groove 201. The filter screen 202 presses the first sliding column 206 in the fourth sliding groove 204 and moves downward, compressing the second spring 205. When the filter screen 202 is fully inserted into the second circular groove 201, the second spring 205 pushes the first sliding column 206 to engage with the slot 203, and it is securely installed in the second circular groove 201. This filters the fluid entering the pipe body 1 and intercepts impurities to prevent the diversion channel 3 from being blocked. When it is necessary to clean or replace the filter screen 202, the first sliding column 206 is slid downward in the fifth sliding groove 207 by pressing down the pressure block 17, so that the first sliding column 206 is disengaged from the slot 203, thus making it easy to remove the filter screen 202.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A microchannel aluminum flat tube with variable cross-section fractal channel structure, comprising a tube body (1), characterized in that: The tube body (1) has multiple diversion channels (3) equidistantly arranged inside. The front side of the top wall of the tube body (1) has multiple air holes (4) equidistantly arranged. The rear side of the inner wall of the air hole (4) has a sliding groove (5). The bottom wall of the sliding groove (5) is equipped with a spring (6). The top of the spring (6) is equipped with a connecting block (7). The right side of the connecting block (7) is fixedly connected to a turntable (8). The tube body (1) has multiple circular grooves (9) equidistantly arranged inside. The turntable (8) is slidably connected to the circular grooves (9). The rear side of the outer wall of the turntable (8) has multiple sliding grooves (10) equidistantly arranged. The inner wall of the second slide groove (10) is slidably connected to a slider (11), the outer wall of the slider (11) is fixedly connected to a closing leaf (12), the outer wall of the closing leaf (12) is fixedly connected to a sliding column (21), the outer wall of the turntable (8) is provided with a disc (13), the outer wall of the disc (13) is provided with multiple slide grooves (14) at equal intervals, the slide grooves (14) are slidably connected to the sliding column (21), the top wall of the tube body (1) is provided with multiple anti-blocking mechanisms (2) at equal intervals, the anti-blocking mechanisms (2) are used to prevent the risk of blockage and scaling in the diversion channel (3).

2. The microchannel aluminum flat tube variable cross-section fractal channel structure according to claim 1, characterized in that: The anti-clogging mechanism (2) includes a second circular groove (201), which is equidistantly opened on the front side of the outer wall of the tube body (1). A filter screen (202) is provided inside the second circular groove (201). The filter screen (202) has a slot (203) on both the left and right sides of its outer wall. The second circular groove (201) has a fourth sliding groove (204) on both the left and right sides of its inner wall. A second spring (205) is installed on the bottom wall of the fourth sliding groove (204). A first sliding column (206) is fixedly connected to the top of the second spring (205). The first sliding column (206) engages with the slot (203). A fifth sliding groove (207) is opened on the front side of the inner wall of the fourth sliding groove (204).

3. The microchannel aluminum flat tube variable cross-section fractal channel structure according to claim 1, characterized in that: The outer wall of the pipe body (1) is fitted with an anti-corrosion layer (15).

4. The microchannel aluminum flat tube variable cross-section fractal channel structure according to claim 2, characterized in that: The filter screen (202) has fasteners (16) fixedly connected to the upper and lower ends of the front side of the outer wall.

5. The microchannel aluminum flat tube variable cross-section fractal channel structure according to claim 2, characterized in that: A pressure block (17) is fixedly connected to the front side of the outer wall of the sliding column (206), and the pressure block (17) is slidably connected to the sliding groove (204).

6. The microchannel aluminum flat tube variable cross-section fractal channel structure according to claim 5, characterized in that: The top wall of the pressure block (17) is equipped with an anti-slip pad (18).

7. The microchannel aluminum flat tube variable cross-section fractal channel structure according to claim 1, characterized in that: Mounting holes (19) are provided at the four corners of the front side of the outer wall of the tube (1).

8. The microchannel aluminum flat tube variable cross-section fractal channel structure according to claim 7, characterized in that: The inner wall of the mounting hole (19) is threaded with a bolt (20).

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