An optimized structure for an aluminum alloy heat exchanger

Abstract

This utility model discloses an optimized structure for an aluminum alloy heat exchanger, relating to the field of heat exchanger technology. It includes a top plate, a partition plate attached to the bottom side of the top plate, and several sequentially stacked flow channel layers attached to the bottom side of the partition plate. A bottom plate is attached to one side of each flow channel layer. Several flow distribution ports are symmetrically arranged on the flow channel layers. Mutually perpendicular heat exchange mechanisms are provided on both sides of the flow channel layers. Each heat exchange mechanism includes a flow distribution groove connected to the corresponding flow distribution port, one end of which is connected to a mixing groove. Several corrugated heat exchange plates are installed between the two sets of mixing grooves of the heat exchange mechanism. Several flow distribution plates are installed within the heat exchange mechanism. This utility model solves the problems of low utilization rate and low heat exchange efficiency of the flow channel layers caused by the gaps in the diffusion grooves in the prior art. This utility model increases the path of the medium flow by using corrugated heat exchange plates, and the heat exchange plates of adjacent flow channel layers are arranged at intervals, increasing the heat exchange area between the flow channel layers and the medium, thereby improving the heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to an optimized structure for an aluminum alloy heat exchanger. Background Technology

[0002] A heat exchanger is an energy-saving device that facilitates heat transfer between two or more fluids at different temperatures. It transfers heat from a higher-temperature fluid to a lower-temperature fluid, bringing the fluid temperature to the specified parameters to meet process requirements. It is also a key component for improving energy efficiency. Heat exchangers can be classified by structure as: floating head heat exchangers, fixed tube sheet heat exchangers, U-tube sheet heat exchangers, and plate heat exchangers. Plate heat exchangers are characterized by high heat transfer efficiency, low resistance coefficient, and compact structure. Their heat exchange channels are formed by stacking numerous plates of the same shape, enabling heat exchange between cold and hot fluids within the channels. Vacuum brazing is a mature welding technology commonly used in the industry for plate heat exchangers.

[0003] Publication No. CN118224904B discloses an aluminum alloy multilayer heat exchanger device and its manufacturing method, including a top plate, a partition plate attached to the bottom surface of the top plate, a plurality of flow channel layers attached to the bottom of the partition plate, and a bottom plate attached to the bottom of the flow channel layers. The heat exchange efficiency is improved by the staggered arrangement of the flow channel layers and the increase of cold flow and hot flow splits for the medium flow.

[0004] However, there are still large smooth gaps between the diffusion grooves on the same side of the flow channel layer. These gaps affect the heat transfer efficiency, and the medium flow channels within the flow channel layer are designed as direct-flow channels, allowing the medium to easily flow through them, thus reducing heat transfer efficiency. Therefore, an optimized structure for an aluminum alloy heat exchanger is needed to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide an optimized structure for an aluminum alloy heat exchanger to solve the aforementioned defects caused by the prior art.

[0006] An optimized structure for an aluminum alloy heat exchanger includes a top plate, a partition plate attached to the bottom side of the top plate, a plurality of sequentially stacked flow channel layers attached to the bottom side of the partition plate, a bottom plate attached to one side of the flow channel layers, a plurality of symmetrically arranged flow outlets on the flow channel layers, and mutually perpendicular heat exchange mechanisms on both sides of the flow channel layers. Each heat exchange mechanism includes a flow channel communicating with a corresponding flow outlet, one end of the flow channel communicating with a mixing channel, a plurality of corrugated heat exchange plates installed between the two sets of mixing channels of the heat exchange mechanism, and a plurality of flow dividers installed in the flow channel of the heat exchange mechanism.

[0007] Preferably, the top plate has a symmetrically arranged main cold flow inlet and main cold flow outlet on one side at a lateral position, and a symmetrically arranged main heat flow inlet and main heat flow outlet on one side at a longitudinal position.

[0008] Preferably, the partition has symmetrically arranged cold flow inlets and cold flow outlets in the horizontal direction, and a plurality of symmetrically arranged hot flow inlets and hot flow outlets in the vertical direction. The cold flow inlets are connected to the main cold flow inlet, the cold flow outlets are connected to the main cold flow outlet, the hot flow inlets are connected to the main hot flow inlet, and the hot flow outlets are connected to the main hot flow outlet.

[0009] Preferably, through holes are provided at the four corners of the top plate, the partition plate, the flow channel layer and the bottom plate.

[0010] Preferably, anti-misbehavior pillars and anti-misbehavior grooves are installed on both sides of the flow channel layer.

[0011] Preferably, one side of the partition and the bottom plate is provided with a heat exchange mechanism that works in conjunction with the adjacent flow channel layer.

[0012] Preferably, the thinner plate reduces thermal resistance, but it must meet the strength requirements of vacuum diffusion welding, and the plate thickness is positively correlated with the pressure resistance of the flow channel. The plate thickness of the flow channel layer can be 1.2 mm or 1.5 mm.

[0013] Preferably, the greater the depth of the liquid flow channel (cold flow channel or hot flow channel), the higher the heat exchange efficiency. However, if the depth of the liquid flow channel is greater than 3 mm, it is easy to generate a flow dead zone. Therefore, the depth of the liquid flow channel can be 1.5 mm, 2.0 mm or 2.5 mm. Correspondingly, the depth of the mixing tank can be 0.75 mm, 1.0 mm or 1.25 mm.

[0014] Preferably, the width of the liquid flow channel (cold flow channel or hot flow channel) can match the gradient distribution of the flow divider. Narrow flow channels enhance turbulence, but increase flow resistance dramatically. The width of the liquid flow channel is not less than 1.0 mm to avoid particle retention. The width of the mixing channel can be 1.2 mm or 1.5 mm.

[0015] The advantages of this invention are: the corrugated heat exchange plate increases the path of the medium flow, and the heat exchange plates of adjacent flow channel layers are arranged at intervals, which increases the heat exchange area between the flow channel layer and the medium, thereby improving the heat exchange efficiency.

[0016] This invention uses a single integrated heat exchange mechanism to avoid gaps that occur when multiple heat exchange mechanisms are set up in parallel, thereby improving the utilization rate of the flow channel layer while preventing gaps from affecting heat exchange efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 , Figure 3 This is a schematic diagram of the flow channel layer from different perspectives on the upper and lower sides.

[0019] Figure 4 This is a cross-sectional structural diagram of the two-channel layer assembly of this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the base plate of this utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the bottom side of the partition of this utility model.

[0022] Figure 7 for Figure 4 A magnified structural diagram of A in the middle.

[0023] The components are: 1. Top plate; 2. Baffle plate; 3. Flow channel layer; 4. Bottom plate; 5. Flow divider; 6. Heat exchange mechanism; 7. Flow divider groove; 8. Mixing groove; 9. Heat exchange plate; 10. Flow divider plate; 11. Main cold flow inlet; 12. Main cold flow outlet; 13. Main hot flow inlet; 14. Main hot flow outlet; 15. Cold flow inlet; 16. Cold flow outlet; 17. Hot flow inlet; 18. Hot flow outlet; 19. Through hole; 20. Anti-foolproof column; 21. Anti-foolproof groove. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figures 1 to 7As shown, an optimized structure of an aluminum alloy heat exchanger includes a top plate 1, a partition plate 2 attached to the bottom side of the top plate 1, a plurality of sequentially stacked flow channel layers 3 attached to the bottom side of the partition plate 2, a bottom plate 4 attached to one side of the flow channel layer 3, a plurality of flow outlets 5 symmetrically arranged on the flow channel layer 3, and heat exchange mechanisms 6 perpendicular to each other arranged on both sides of the flow channel layer 3. The heat exchange mechanism 6 includes a flow channel 7 connected to the corresponding flow outlet 5, one end of the flow channel 7 connected to a mixing channel 8, a plurality of corrugated heat exchange plates 9 installed between the two sets of mixing channels 8 of the heat exchange mechanism 6, and a plurality of flow divider plates 10 installed in the flow channel 7 of the heat exchange mechanism 6. The heat exchange mechanisms 6 located on opposite sides of the same flow channel layer 3 are perpendicularly distributed to each other, so that the cold flow medium and the hot flow medium can flow vertically at intervals to perform heat exchange operations. The flow divider 10 is loose when it is in the middle of the flow channel layer 3 and tighter when it is closer to the edge. The tight flow divider 10 has small gaps, the medium flows fast, and it is easier for the medium to flow into both sides of the flow channel layer 3, which improves the heat exchange efficiency and avoids the problem of excessive flow velocity in the center and stagnation at the edge, making the entire heat exchange surface more evenly utilized. One side of the bottom plate 4 is smooth, and the other side is provided with a heat exchange mechanism 6 that works in conjunction with the heat exchange mechanism 6 on the flow channel layer 3. The surface of the bottom plate 4 with the heat exchange mechanism 6 is in contact with the surface of the bottommost flow channel layer 3 with the heat exchange mechanism 6, so that the heat exchange mechanism 6 forms a complete medium flow channel.

[0026] Furthermore: the design of the dual-sided heat exchange mechanism 6 and the flow channel layer 3 enhances the heat dissipation area and turbulence effect. The heat exchange mechanisms 6 are set perpendicular to each other on both sides of the flow channel layer 3 to form a multi-level fluid distribution network.

[0027] Furthermore, the heat exchange plate 9 is designed in a wave-like (or corrugated) shape, making the medium flow channel a continuous curved path. Under the same projected area, the actual surface area of ​​the curved flow channel is significantly larger than that of the straight flow channel, which directly improves the heat transfer efficiency. The medium needs to turn repeatedly along the wave path, which prolongs the residence time in the flow channel and strengthens the heat exchange process. At the same time, the wave-shaped turning point will destroy the laminar boundary layer and induce the fluid to generate vortices and turbulence. Turbulence makes the fluid fully mixed, reduces the boundary layer thickness, improves the heat transfer coefficient between the wall and the medium, and the high turbulence reduces the adhesion of impurities in the flow channel and maintains long-term heat transfer efficiency.

[0028] Furthermore, compared with the direct current channel structure, the flow channel structure designed in this utility model has a larger heat exchange area, higher turbulence intensity, and more uniform flow distribution (optimized uniformity by the gradient splitter plate 10).

[0029] In this embodiment, the top plate 1, the partition plate 2, the several flow channel layers 3, the bottom plate 4, and the four positioning pins are arranged in the following order according to the structural design requirements: the top is a top plate 1, then the partition plate 2 with the heat exchange mechanism 6 facing down is connected to the bottom side of the top plate 1, below the partition plate 2 are several overlapping flow channel layers 3, the flow channel layers 3 are stacked on top of each other, during the stacking process, the anti-foolproof post 20 of the upper flow channel layer 3 is inserted into the anti-foolproof groove 21 of the lower flow channel layer 3, the heat exchange mechanisms 6 on the adjacent sides of two adjacent flow channel layers 3 are in the same direction and tightly spliced ​​to form a complete medium. The heat exchange plates 9 of two adjacent flow channel layers 3 are sequentially inserted into the gap between each other. The bottom side is a base plate 4, and the heat exchange mechanism 6 provided on the partition plate 2 and the base plate 4 is spliced ​​with the heat exchange mechanism 6 of the flow channel layer 3 to form a complete medium flow channel. The through holes 19 of the above workpiece are in the same position and interconnected. Four positioning pins are sequentially placed into the through holes 19 for assembly to form a multi-layer heat exchanger assembly of aluminum alloy superimposed on each other. Then, the multi-layer heat exchanger assembly is assembled with welding fixtures into a vacuum diffusion welding equipment for welding operation, so that multiple parts of the multi-layer heat exchanger workpiece are welded into one piece.

[0030] In this embodiment, a total cold flow inlet 11 and a total cold flow outlet 12 are symmetrically arranged on one side of the top plate 1 at a lateral position, and a total hot flow inlet 13 and a total hot flow outlet 14 are symmetrically arranged on one side of the top plate 1 at a longitudinal position. The total cold flow inlet 11 and the total cold flow outlet 12, as well as the total hot flow inlet 13 and the total hot flow outlet 14, are respectively connected to a total cold flow circulation device and a total hot flow circulation device.

[0031] In this embodiment, the partition 2 has symmetrically arranged cold flow inlets 15 and cold flow outlets 16 in the horizontal position, and a plurality of symmetrically arranged hot flow inlets 17 and hot flow outlets 18 in the vertical position. The cold flow inlets 15 are connected to the total cold flow inlet 11, the cold flow outlets 16 are connected to the total cold flow outlet 12, the hot flow inlets 17 are connected to the total hot flow inlet 13, and the hot flow outlets 18 are connected to the total hot flow outlet 14.

[0032] In this embodiment, through holes 19 are provided at the four corners of the top plate 1, the partition plate 2, the flow channel layer 3, and the bottom plate 4. One side of the partition plate 2 is smooth, and the other side has the same structure as the heat exchange mechanism 6 on the flow channel layer 3. The side of the partition plate 2 with the heat exchange mechanism 6 is in contact with the side of the uppermost flow channel layer 3 with the heat exchange mechanism 6, so that the two sets of heat exchange mechanisms 6 form a complete medium flow channel. Multiple flow channel layers 3 are stacked, and the heat exchange mechanisms 6 of adjacent layers are tightly spliced ​​to form a complete flow channel, which can accommodate more heat exchange surface per unit volume, making it suitable for space-constrained scenarios. The combination of wave-shaped flow channel + vertical crossflow + flow splitting optimization achieves a doubling of heat exchange efficiency.

[0033] In this embodiment, anti-misalignment posts 20 and anti-misalignment grooves 21 are respectively installed on both sides of the flow channel layer 3. When the flow channel layer 3 is installed, the anti-misalignment posts 20 and anti-misalignment grooves 21 ensure that the splicing direction of the heat exchange plates 9 of adjacent flow channel layers 3 is consistent, avoiding the risk of collision when the heat exchange plates 9 are inserted into the gap between each other due to different directions.

[0034] In this embodiment, a heat exchange mechanism 6 is provided on one side of the partition 2 and the bottom plate 4 to cooperate with the adjacent flow channel layer 3.

[0035] In this embodiment, the thickness design of the cold / hot medium flow channel plate is shown in the table below:

[0036] Design basis:

[0037] 1. Thermal conduction requirements: Thinner plates reduce thermal resistance, but must still meet the strength requirements of vacuum diffusion welding.

[0038] 2. Pressure resistance: Plate thickness is positively correlated with the pressure resistance of the flow channel.

[0039] 3. Weight Limitations: Lightweight design is a core advantage of aluminum alloy heat exchangers.

[0040] It should be noted that the thickness of the cold / hot medium flow channel plate can be the thickness of the flow channel layer 3.

[0041] In this embodiment, the depth design of the cold runner and hot runner is shown in the table below:

[0042] Design basis:

[0043] 1. Heat exchange area: Depth increases → Area increases → Heat exchange efficiency increases

[0044] 2. Flow resistance control: Depth > 3mm is prone to creating flow dead zones.

[0045] 3. Stacking compatibility: Requires matching the height of the corrugated board.

[0046] It should be noted that the depth of the cold runner and the hot runner can be the sum of the depths of two adjacent mixing channels 8. For example, when the depth of the cold runner and the hot runner is 2mm, the depth of the corresponding mixing channel 8 can be 1mm.

[0047] In this embodiment, the widths of the cold runner and hot runner are designed as shown in the table below:

[0048] Design basis:

[0049] 1. Flow distribution: The width must match the 10-gradient distribution of the splitter.

[0050] 2. Turbulence generation: Narrow channels enhance turbulence, but also drastically increase flow resistance.

[0051] 3. Anti-clogging: ≥1.0mm to prevent particle retention.

[0052] It should be noted that the width of the cold runner and the hot runner can be the same as the width of the corresponding mixing tank 8.

[0053] The working principle of this utility model is as follows: the cold flow inlet 11 and the hot flow inlet 13 respectively flow into the cold medium and the hot medium. The cold medium and the hot medium pass through the cold flow inlet 15 and the hot flow inlet 17 respectively. Then, the cold medium and the hot medium flow into the corresponding heat exchange mechanism 6 in sequence through the diversion port 5. Then, the cold medium and the hot medium are diverted by the diversion plate 10 and heat exchanged through the heat exchange plate 9. The flow directions of the cold medium and the hot medium in the heat exchange mechanism 6 are perpendicular to each other. Then, the cold medium and the hot medium converge from the cold flow outlet 16 and the hot flow outlet 18 respectively, and flow out through the total cold flow outlet 12 and the total hot flow outlet 14.

[0054] This invention increases the path of the medium flow by using a corrugated heat exchange plate 9. At the same time, the heat exchange plates 9 of adjacent flow channel layers 3 are arranged at intervals, which increases the heat exchange area between the flow channel layer 3 and the medium, thereby improving the heat exchange efficiency.

[0055] This invention uses a set of integrated heat exchange mechanisms 6 to avoid gaps caused by multiple parallel heat exchange mechanisms 6, thereby improving the utilization rate of the flow channel layer 3 while avoiding gaps affecting heat exchange efficiency.

[0056] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. An optimized structure of an aluminum alloy heat exchanger, characterized by: The system includes a top plate (1), a partition plate (2) is attached to the bottom side of the top plate (1), a plurality of sequentially stacked flow channel layers (3) are attached to the bottom side of the partition plate (2), a bottom plate (4) is attached to one side of the flow channel layer (3) located on the bottom side, a plurality of flow outlets (5) are symmetrically arranged on the flow channel layer (3), and heat exchange mechanisms (6) perpendicular to each other are arranged on both sides of the flow channel layer (3). The heat exchange mechanism (6) includes a flow channel (7) connected to the corresponding flow outlet (5), a mixing channel (8) is connected to one end of the flow channel (7), a plurality of corrugated heat exchange plates (9) are installed between the two sets of mixing channels (8) of the heat exchange mechanism (6), and a plurality of flow dividers (10) are installed in the flow channel (7) of the heat exchange mechanism (6).

2. The optimized structure of an aluminum alloy heat exchanger according to claim 1, characterized in that: The top plate (1) has a symmetrically arranged main cold flow inlet (11) and main cold flow outlet (12) on one side at a horizontal position, and a symmetrically arranged main heat flow inlet (13) and main heat flow outlet (14) on one side at a vertical position.

3. The optimized structure of an aluminum alloy heat exchanger according to claim 2, characterized in that: The partition (2) has symmetrically arranged cold flow inlet (15) and cold flow outlet (16) in the horizontal position, and several symmetrically arranged hot flow inlet (17) and hot flow outlet (18) in the vertical position. The cold flow inlet (15) is connected to the total cold flow inlet (11), the cold flow outlet (16) is connected to the total cold flow outlet (12), the hot flow inlet (17) is connected to the total hot flow inlet (13), and the hot flow outlet (18) is connected to the total hot flow outlet (14).

4. The optimized structure of an aluminum alloy heat exchanger according to claim 1, characterized in that: Through holes (19) are provided at the four corners of the top plate (1), the partition plate (2), the flow channel layer (3) and the bottom plate (4).

5. The optimized structure of an aluminum alloy heat exchanger according to claim 1, characterized in that: Anti-foolproof posts (20) and anti-foolproof grooves (21) are installed on both sides of the flow channel layer (3).

6. An optimized structure for an aluminum alloy heat exchanger according to any one of claims 1 to 5, characterized in that: The partition (2) and the bottom plate (4) are provided with a heat exchange mechanism (6) that works in conjunction with the adjacent flow channel layer (3) on one side.

Images