Heat exchange assembly capable of preventing end interference and assembling method thereof

Abstract

The invention discloses a heat exchange assembly capable of preventing end interference and an assembling method of the heat exchange assembly, and relates to the technical field of heat exchanger assembling. The technical problem that when a traditional flat pipe is assembled with a flat base plate, physical space interference is caused by thick collecting pipes at the ends is solved. The assembly comprises a heat exchange substrate, a flow collecting component and a flat heat exchange tube. The flat heat exchange tube is artificially divided into a straight heat exchange section tightly attached to the heat exchange base plate and a bent connecting section which is outwards separated from the plane of the base plate and tilts. The current collecting component is connected to the bent connecting section. By means of height compensation provided by the bent connecting section, the thick and large current collecting component is suspended to avoid the substrate, and a non-contact space avoiding gap is formed. Physical collision is thoroughly eliminated, and 100% zero-distance attachment of the core heat exchange pipe section and the base plate is achieved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger structural design and precision refrigeration assembly technology, and in particular to a heat exchange component and its assembly method that prevents end interference by reconstructing the three-dimensional space at the end of the fluid pipeline to solve component assembly interference and reduce contact thermal resistance. Background Technology

[0002] As modern refrigeration technology continues to evolve towards compactness, efficiency, and lightweight design, flat heat exchange tubes, due to their extremely high specific surface area and heat transfer coefficient, are widely used in various high-end thermal management systems, such as evaporators in vehicle refrigerators.

[0003] In many practical system-level applications, the typical architecture of a heat exchanger is to lay multiple flat heat exchange tubes side by side on a large heat exchange substrate (such as an aluminum plate with air ducts). In order to achieve uniform distribution and collection of fluids, the two ends of the flat heat exchange tubes must be connected to a manifold, which is commonly referred to in the industry as a "flow manifold" or "distributor".

[0004] However, this traditional system-level assembly architecture faces a fatal and widespread physical space interference defect:

[0005] To reduce the overall fluid resistance of the system, the manifold must have a sufficient internal flow cross-sectional area; therefore, its outer diameter must be significantly larger than the thickness of the flat heat exchanger tube itself. If, during assembly, traditional "straight" flat heat exchanger tubes are directly welded to the manifold to form a straight pipe network extending on the same horizontal plane, the large manifold will be the first to touch the bottom when this network is placed flat on the heat exchanger substrate. The manifold acts like a "shield," forcibly suspending the main body of the flat heat exchanger tube, preventing it from contacting the flat surface of the heat exchanger substrate.

[0006] This physical interference caused by the difference in end dimensions results in a huge air gap (contact thermal resistance) between the core flat heat exchange tube and the substrate, causing a sharp drop in the heat exchange efficiency of the entire heat exchange assembly. To address this interference, current technologies typically require "grooving" or "stamping" recesses into the heat exchange substrate to accommodate the bulky current collector. However, this not only compromises the strength of the heat exchange substrate but also significantly increases manufacturing costs.

[0007] Therefore, how to completely eliminate end interference and achieve zero-distance bonding between the flat tube and the substrate without damaging the substrate structure or reducing the diameter of the current collector tube is a core engineering problem that urgently needs to be solved in this field. Summary of the Invention

[0008] To address the shortcomings in the prior art, this invention provides a heat exchange component that prevents end interference, its assembly method, and a refrigeration device. It aims to solve the core technical problems of existing flat tube heat exchangers when assembled with flat substrates, such as physical interference caused by excessively large end manifold size, suspended heat exchange surface, excessive contact thermal resistance, and high substrate processing costs.

[0009] To solve the above-mentioned technical problems, in a first aspect, the present invention provides the following technical solution:

[0010] A heat exchange assembly for preventing end interference is characterized by comprising: a heat exchange substrate with a flat surface; a flow collector having a confluence cavity inside and a first thickness dimension on its outer contour; and at least one flat heat exchange tube having a channel for fluid flow inside and a second thickness dimension on its outer contour; the first thickness dimension being greater than the second thickness dimension; the flat heat exchange tube sequentially includes a straight heat exchange section and at least one bent connecting section along its extension direction, the end of the bent connecting section communicating with the flow collector; wherein the bottom surface of the straight heat exchange section is in contact with and fixedly connected to the flat surface of the heat exchange substrate; the bent connecting section is bent away from the plane containing the flat surface of the heat exchange substrate, such that the flow collector connected to the end of the bent connecting section is suspended, thereby forming a non-physical contact space clearance gap between the outer wall of the flow collector and the flat surface of the heat exchange substrate.

[0011] By employing a spatial three-dimensional reconstruction technique that artificially divides the flat heat exchange tubes into "fitting, straight heat exchange sections" and "upward-curving, bent connecting sections," this invention achieves the core beneficial effect of resolving dimensional conflicts. This invention no longer treats the pipe network as a rigid two-dimensional plane, but rather utilizes the inherent ductility of the pipe material to grant it freedom in the height direction (Z-axis). The bent connecting sections cleverly compensate for the geometric height difference (i.e., the difference between the first and second thicknesses) between the manifold and the flat heat exchange tubes. This causal relationship allows the large manifold to be "suspended" above the substrate, completely eliminating its negative effect as an "interference pad," thereby ensuring that the central core straight heat exchange section can adhere firmly to the heat exchange substrate with 100% coverage without any physical obstruction, reducing the contact thermal resistance to an extremely low physical limit.

[0012] In a preferred embodiment of the present invention, the bent connecting section has a bending deflection angle relative to the plane of the straight heat exchange section. The size of the bending deflection angle is configured such that the horizontal height of the lowest profile generatrix of the flow collector on the side facing the heat exchange substrate is higher than or parallel to the horizontal height of the flat surface of the heat exchange substrate. By further employing a defined height spatial geometry to define the feature, the present invention can also achieve the beneficial effect of height adaptive matching. Regardless of the required flow rate or pipe diameter of the flow collector, interference can be perfectly resolved simply by adjusting the bending deflection angle, giving the component extremely strong system expansion compatibility.

[0013] In a preferred embodiment of the present invention, the bending deflection angle is limited to a range of 5 to 45 degrees, and the bending radius of the bending connection section is greater than three times the second thickness dimension of the flat heat exchange tube to prevent throttling collapse of the channel at the bend. By further employing specific angle thresholds and minimum bending radius constraints, the present invention can also achieve dual protection of hydrodynamic properties and mechanical strength. This avoids the flattening and dead bending of the internal microchannels caused by excessive angles or excessively sharp bends.

[0014] In a preferred embodiment of the present invention, the flat heat exchange tube is a multi-cavity microchannel profiled tube with a specific cross-sectional morphology. Its cross-section has alternating layers along its width: a contact heat exchange zone with a thickness equal to the second thickness dimension, and a thinning avoidance zone with a thickness less than the second thickness dimension. The plastic deformation hub of the bent connection section is concentrated within the thinning avoidance zone to protect the channel cross-section within the contact heat exchange zone from bending moment stress damage. By further employing the non-uniform thickness profiled cross-sectional morphology, the present invention can also achieve a very low-cost, non-destructive, anti-collapse cold bending process. The thinning avoidance zone acts like a naturally designed "flexible mechanical hinge," actively absorbing all yield deformation stress, eliminating the need for complex mold internal support or sand filling processes during bending operations, greatly improving production efficiency.

[0015] In a preferred embodiment of the present invention, a metal brazing layer is formed between the bottom surface of the heat exchange zone and the flat surface of the heat exchange substrate; the bottom surface of the thinned clearance zone forms a non-welded drainage channel between the flat heat exchange tube and the heat exchange substrate due to the reduced thickness. The non-welded drainage channel is used to accommodate excess solder overflowing from the metal brazing layer in a high-temperature molten state. By further employing the technical feature of the non-welded drainage channel, the present invention can also achieve an advanced metallurgical control effect of "no sag and zero cold solder joints" in large-area blind soldering scenarios, making the end clearance and perfect middle welding complement each other.

[0016] In a preferred embodiment of the present invention, the heat exchanger is a cylindrical metal tube, a semi-circular metal tube, or a metal cavity with a rectangular cross-section; the flat heat exchange tube is inserted into and sealed by welding at the end of the bent connection section into an assembly gap opened on the side wall of the heat exchanger. By further adopting diverse heat exchanger structural features, the present invention can also adapt to different refrigerant types and different pressure requirements.

[0017] In a preferred embodiment of the present invention, the bottom surface of the flat heat exchange section and the flat surface of the heat exchange substrate are fixed together by a high thermal conductivity structural layer, or by a mechanical pressing component to maintain surface contact between the two. By further employing non-welding fixing alternatives, the present invention can also be applied to application scenarios that are temperature-sensitive or cannot be brazed in a furnace, thus broadening the application scope of this component.

[0018] In a preferred embodiment of the present invention, the heat exchange assembly includes multiple parallel flat heat exchange tubes; the heat exchange substrate is a hollow metal extrusion with a convection chamber inside, which is used for airflow or for filling phase change energy storage material. By further employing the features of a multi-tube array and a hollow substrate, the present invention can also achieve a geometric increase in heat exchange power and integrate cold energy storage function.

[0019] To solve the above-mentioned technical problems, in a second aspect, the present invention provides the following technical solution:

[0020] An assembly method for a heat exchange assembly with anti-end interference features, characterized by the following steps: preparing at least one straight flat heat exchange tube, a flow collector, and a heat exchange substrate with a flat surface; placing the flat heat exchange tube in a bending die, applying a normal force to its end to induce plastic deformation, forming a bent connecting section that curves to one side at the end, and retaining the undeformed middle area as a straight heat exchange section; connecting and pre-fixing the flow collector to the end of the bent connecting section to form a pipe network skeleton; placing the pipe network skeleton on the flat surface of the heat exchange substrate, wherein the flow collector is suspended and supported above the flat surface by the bent connecting section due to the geometric height compensation provided by the bent connecting section, while the bottom surface of the straight heat exchange section achieves full-area contact with the flat surface; and performing a non-removable fixing process on the contact surface between the straight heat exchange section and the heat exchange substrate while maintaining the full-area contact and the suspended avoidance state of the flow collector.

[0021] By employing the aforementioned manufacturing process sequence of "first partially molding to avoid height, then assembling the whole without interference," this invention achieves cost reduction and efficiency improvement by reversing traditional processing logic. This method eliminates the destructive operations of complex machining on the heat exchange substrate, cleverly transferring "adaptive deformation" to the highly malleable tube itself. This not only preserves the structural strength of the heat exchange substrate but also significantly reduces the overall manufacturing cost of the assembly.

[0022] In a preferred embodiment of the present invention, the fixing process is an in-furnace brazing process; a brazing filler metal layer of a predetermined thickness is pre-coated on the flat surface of the heat exchange substrate; during placement, the straight heat exchange section presses down on the brazing filler metal layer by its own weight; the suspension height of the bent connection section is configured such that after the brazing filler metal layer melts in the brazing furnace and causes a slight settlement of the straight heat exchange section, the outer wall of the current collector still does not contact or interfere with the heat exchange substrate. By further employing the process feature of a preset settlement compensation allowance, the present invention can also achieve anti-interference protection under extreme tolerance conditions, ensuring that no serious accident of secondary bottoming of the current collector occurs under high temperature conditions, thereby improving the welding yield.

[0023] In a preferred embodiment of the present invention, the bending die includes a lower die with an inclined forming surface; by controlling the angle of the inclined forming surface of the lower die, the lifting height of the bent connecting section from the reference plane is precisely controlled, so that the lifting height is greater than or equal to the radius of the current collecting component. By further employing the die forming technology feature with a specific inclined surface, the present invention can also achieve highly digitalized assembly precision control, ensuring the consistency of the height difference at the ends of each pipe in mass production.

[0024] To address the aforementioned technical problems, in a third aspect, the present invention provides the following technical solution:

[0025] A refrigeration device is characterized in that it includes a compressor, a throttling device, and a circulation pipeline; a heat exchange component with anti-end interference as described above is connected in series in the circulation pipeline; the collector is connected to the circulation pipeline; and the heat exchange component with anti-end interference is configured as a cold output terminal or a heat dissipation terminal in the refrigeration device.

[0026] By employing a technique that integrates the aforementioned heat exchange components with zero assembly gaps into the overall system, this invention achieves a significant leap in overall cooling efficiency (COP). Eliminating contact thermal resistance means that the compressor can operate with a smaller evaporation-condensation temperature difference, thereby substantially reducing system power consumption.

[0027] In a preferred embodiment of the present invention, the refrigeration device is a vehicle-mounted insulated refrigerator; the heat exchange substrate constitutes the outer wall of the inner liner of the vehicle-mounted insulated refrigerator or the wall of the cold air circulation duct; a phase change refrigerant in an evaporative heat absorption state flows inside the flat heat exchange tube. By further adopting the application scenario characteristics of integrating the heat exchange components into a vehicle-mounted refrigerator, the present invention can also achieve the strongest cooling efficiency with minimal volume occupation in the automotive cabin environment.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. Completely overcomes the engineering paradox between "pipe diameter requirements" and "fitting area": ​​This invention overturns the traditional planar assembly mindset, utilizing a three-dimensional micro-bending (bent connection section) at the pipe end, effectively providing an invisible "suspended support" for the large manifold component. This not only meets the fluid mechanics requirements for large pipe diameters but also ensures full-area fit between the flat heat exchange tube and the substrate in terms of heat transfer, completely eliminating the negative impact of contact thermal resistance.

[0030] 2. Eliminates the high cost of destructive substrate processing: Traditionally, to make room for the current collector, the heat exchange substrate is slotted or countersunk. This invention directly transfers this "avoidance task" to the heat exchange tube material, which has excellent ductility. Simple die stamping and bending replaces complex machine tool cutting, protecting the integrity of the substrate and significantly reducing manufacturing costs.

[0031] 3. Provides a highly resilient system-level patent protection moat: The concept of this invention is at a high-dimensional abstraction level of assembly technology. Regardless of the internal microstructure of the flat tube used by competitors, as long as they utilize the longitudinal bending of the tube end in space to solve the assembly interference of the flat substrate, they will inevitably fall within the protection scope of this invention, possessing extremely high patent protection power. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments disclosed in this invention, the accompanying drawings of the embodiments will be briefly described below. These drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0033] Figure 1 This is a schematic diagram of the main view (side view assembly) of the heat exchange component for preventing end interference in an embodiment of the present invention, which clearly shows the space avoidance effect brought about by the end bending.

[0034] Figure 2 This is a schematic diagram of the cross-sectional assembly structure of the multi-cavity microchannel irregular tube with a thinning and avoidance zone used in the embodiments of the present invention.

[0035] Figure 3This is a schematic diagram of the cross-sectional characteristic dimensions of the special-shaped pipe used in the embodiments of the present invention. Detailed Implementation

[0036] The technical solutions (including preferred technical solutions) of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] This embodiment provides a heat exchange component that prevents end interference, which is a general underlying architecture for resolving spatial geometric conflicts during the compact assembly of refrigeration equipment. For example... Figure 1 As shown.

[0039] The heat exchange assembly includes a heat exchange substrate 10 that carries out the heat exchange task. In specific applications, it can be an aluminum alloy air duct on the side wall of a vehicle refrigerator, characterized by having a flat surface that needs to exchange heat.

[0040] Meanwhile, the component includes multiple flat heat exchange tubes 20 arranged side by side. At the ends of these tubes, in order to achieve unified collection or distribution of fluid, transversely spanning manifolds 30 must be welded.

[0041] To ensure low flow resistance, the cross-sectional area of ​​the collector 30 must be large enough, resulting in its first outer thickness dimension far exceeding the second thickness dimension of the flat heat exchange tube 20. If the tube is in a straight cylindrical state, the collector 30 will bulge downwards and directly press against the heat exchange substrate 10, causing the flat tube to be completely suspended.

[0042] In this embodiment, no destructive drilling is performed on the flat heat exchange substrate 10. Instead, the three-dimensional morphology of the flat heat exchange tube 20 is reconstructed.

[0043] like Figure 2 As shown, along the longitudinal direction of the pipe, we divide it into a straight heat exchange section 20a responsible for core heat exchange and a bent connection section 20b responsible only for end connection. The straight heat exchange section 20a, with its completely flat bottom surface, fits perfectly against the flat surface of the heat exchange substrate 10 without any dead angles.

[0044] The bent connecting section 20b undergoes a plastic deflection towards the air above the surface of the heat exchange substrate 10. This deflection angle (preferably 15 to 30 degrees) generates an upward height compensation.

[0045] Thanks to this height compensation, the large collector component 30 installed at the very top is steadily "suspended" in mid-air. A clearly visible clearance 40 is formed between the lowest contour of the collector component 30 and the surface of the heat exchange substrate 10. This completely eliminates physical impact and ensures a perfect fit during the assembly of the heat exchange system.

[0046] Example 2

[0047] Based on the three-dimensional anti-interference architecture constructed in Example 1, this embodiment further combines the present invention with a highly advanced irregular multi-cavity microchannel tube to achieve the dual extreme effects of anti-interference and blind welding quality control.

[0048] In this embodiment, the flat heat exchange tube 20 used is a specially designed shaped tube with a wavy cross-section, such as... Figure 2 and Figure 3 As shown, its cross-section is divided into a thicker, fitted heat exchange zone 21 and an inwardly recessed, non-porous, thinned clearance zone 22.

[0049] When the end of the flat heat exchange tube 20 is forcibly pulled upward to form a "bent connection section 20b" using physical tools, the tube is very prone to fatal damage such as "inner wall wrinkling, outer wall tearing, and inner cavity flattening" under bending moment.

[0050] This embodiment perfectly mitigates this risk through irregular cross-sectional morphology and micro-thickness control. Inside the heat exchange zone 21, longitudinal ribs 23 with a thickness of 0.2-1.0 mm are provided, and these ribs are wrapped above and below by a first outer wall 25 and a second outer wall 26 with a thickness of 0.3-1.5 mm. In contrast, the overall thickness H1 of the deeply recessed solid thinning clearance zone 22 is controlled to be only 1 / 4 to 1 / 2 of the maximum thickness H2 of the heat exchange zone 21.

[0051] This significant difference in material distribution creates a remarkable synergistic effect of "zero breakage during cold bending": when bending stress is applied, the thinned relief zone 22, with its smallest (weakest) structural section modulus, will proactively yield and act as a "flexible mechanical hinge." Almost all bending stress is absorbed and dissipated in this solid area. Adjacent to it, the heat exchange zone 21, with its robust "grid-like mechanical structure" formed by thickened outer walls and dense longitudinal ribs, has a much higher overall rigidity than the thinned relief zone 22. Therefore, the heat exchange zone 21 warps up, but its fragile internal microchannel cavity remains undamaged by external forces, thus perfectly forming an interference-resistant warped corner with high flow rate without the need for expensive internal support molds.

[0052] The second layer of synergy (advanced drain brazing): When the component is placed on the heat exchange substrate 10 and fed into the brazing furnace, since the straight heat exchange section 20a has eliminated the suspension, its contact heat exchange area 21 is tightly pressed onto the pre-placed solder, forming a metal brazing layer 50. At this time, the deeply recessed thinning avoidance area 22 does not contact the substrate, forming a through non-welding drain channel 60. It not only cuts off the tendency of solder to flow outward (eliminating edge dripping), but also provides a waste bin to accommodate excess solder and gas, ensuring a pure solder penetration rate within the contact area.

[0053] Example 3

[0054] This embodiment details the advanced assembly method for the heat exchange assembly with anti-end interference as described above.

[0055] The method includes the following steps:

[0056] Step 1: Material Preparation: Cut flat heat exchanger tubes into straight plate shapes. Prepare the heat exchanger base plate 10 and the manifold 30.

[0057] Step 2, CNC end forming: The tube is fed into a bending machine with an inclined die surface. The lower die is a support platform with a specific inclination. The end of the tube undergoes plastic deformation along the inclined surface, forming a raised, bent connecting section 20b.

[0058] Step 3, Pre-assembly and base construction: Align the manifold 30 with the ends of the bent connection sections 20b of each pipe and fix it to form a pipe network skeleton with the feature of "suspended ends".

[0059] Step 4, Self-weight Compression Bonding: Pre-apply solder paste to the surface of the heat exchange substrate 10. Place the pipe network frame on the substrate. At this moment: the current collector 30, which was originally large enough to support the entire component, is stably suspended in mid-air, entirely supported by the bent sections at both ends. The only load-bearing point of the entire frame is the bottom surface of the flat heat exchange section 20a.

[0060] Step 5, Settlement-Compensated High-Temperature Brazing: The component enters the high-temperature furnace. The solder paste melts into a liquid state, and the straight heat exchange section 20a will experience a slight downward settlement under its own gravity. Due to the sufficient angular margin reserved in Step 2, even if settlement occurs, the current collector 30 will still maintain a safe distance from the substrate, preventing a catastrophic welding accident of "secondary bottoming and lifting". After exiting the furnace, the component possesses perfect mechanical bonding strength and peak thermal conductivity.

[0061] Example 4

[0062] This embodiment relates to a refrigeration device that applies the above-mentioned heat exchange components to a system, taking a vehicle refrigerator as an example.

[0063] In this high-end in-vehicle refrigerator, the internal cooling capacity is mainly provided by a large-area backplate evaporator. The heat exchange substrate 10 of this invention is the air duct wall panel, on which a network of pipes is installed to eliminate interference.

[0064] When the compressor starts, refrigerant is injected from the manifold 30. By completely eliminating contact blind spots and gap thermal resistance caused by assembly interference, the cold energy generated in the microchannels pours to the inner liner surface like an electric current passing through a superconductor, reducing the refrigerator's cooling time by at least 30% compared to traditional straight-tube evaporators and significantly reducing energy consumption.

[0065] It will be readily understood by those skilled in the art that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, substitutions, improvements, etc., made under the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A heat exchange assembly to prevent end interference, characterized in that, include: A heat exchange substrate with a flat surface; A current collecting component, wherein the internal part of the current collecting component has a current merging cavity, and the outer contour of the current collecting component has a first thickness dimension; And at least one flat heat exchange tube, the flat heat exchange tube having a channel for fluid flow inside, and the outer contour of the flat heat exchange tube having a second thickness dimension; the first thickness dimension is greater than the second thickness dimension; The flat heat exchange tube includes, along its extension direction, a straight heat exchange section and at least one bent connection section, the end of which is connected to the flow collection component. The bottom surface of the straight heat exchange section is in contact with and fixedly connected to the flat surface of the heat exchange substrate; the bent connecting section is bent away from the plane where the flat surface of the heat exchange substrate is located, so that the current collection component connected to the end of the bent connecting section is suspended in the air, thereby forming a space clearance gap without physical contact between the outer wall of the current collection component and the flat surface of the heat exchange substrate.

2. The heat exchange assembly for preventing end interference according to claim 1, characterized in that, The bent connecting section has a bending deflection angle relative to the plane where the straight heat exchange section is located. The size of the bending deflection angle is configured such that the horizontal height of the lowest profile generatrix of the current collection component facing the heat exchange substrate is higher than or parallel to the horizontal height of the flat surface of the heat exchange substrate.

3. The heat exchange assembly for preventing end interference according to claim 2, characterized in that, The bending deflection angle is limited to a range of 5 degrees to 45 degrees, and the bending radius of the bending connection section is greater than 3 times the second thickness dimension of the flat heat exchange tube, in order to prevent the channel from throttling and collapsing at the bend.

4. The heat exchange assembly for preventing end interference according to claim 1, characterized in that, The flat heat exchange tube is a multi-cavity microchannel profiled tube with a specific cross-sectional shape. Its cross-section has alternating heat exchange zones with a thickness equal to the second thickness dimension and thinning avoidance zones with a thickness less than the second thickness dimension distributed along the width direction. The plastic deformation hub of the bent connecting section is concentrated in the thinning avoidance area to protect the channel cross section in the fitting heat exchange zone from bending moment stress damage.

5. The heat exchange assembly for preventing end interference according to claim 4, characterized in that, A metal brazing layer is formed between the bottom surface of the heat exchange zone and the flat surface of the heat exchange substrate. Due to the reduction in thickness, the bottom surface of the thinning avoidance area forms a non-welded drainage channel between the flat heat exchange tube and the heat exchange substrate. The non-welded drainage channel is used to accommodate excess solder that overflows from the metal brazing layer in a high-temperature molten state.

6. The heat exchange assembly for preventing end interference according to claim 1, characterized in that, The heat exchanger is a cylindrical metal tube, a semi-circular metal tube, or a metal cavity with a rectangular cross-section; the flat heat exchange tube is inserted into and sealed by welding at the end of the bent connection section into the assembly gap opened on the side wall of the heat exchanger.

7. The heat exchange assembly for preventing end interference according to any one of claims 1 to 6, characterized in that, The heat exchange assembly includes multiple parallel flat heat exchange tubes; The heat exchange substrate is a hollow metal extrusion with a convection chamber inside, which is used for air flow or for filling phase change energy storage material.

8. A method for assembling a heat exchange assembly with anti-end interference as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Prepare at least one straight, flat heat exchange tube, as well as a manifold and a heat exchange substrate with a flat surface. The flat heat exchange tube is placed in a bending die, and a normal force is applied to its end to cause plastic deformation, forming a bent connection section that curves to one side at the end, while the undeformed middle area is retained as a straight heat exchange section. The current collection component is connected to the end of the bent connection section and pre-fixed to form a pipeline framework; The pipe network frame is placed on the flat surface of the heat exchange substrate. Due to the geometric height compensation provided by the bent connection section, the flow collection component is suspended and supported on the flat surface by the bent connection section. At the same time, the bottom surface of the straight heat exchange section makes full-area contact with the flat surface. While maintaining full-area contact and with the current collection component suspended and avoiding contact, a non-removable fixing process is applied to the contact surface between the straight heat exchange section and the heat exchange substrate.

9. The assembly method according to claim 8, characterized in that, The fixing process is in-furnace brazing; a brazing filler metal layer of a set thickness is pre-coated on the flat surface of the heat exchange substrate; during placement, the straight heat exchange section presses the brazing filler metal layer by its own weight; the suspension height of the bent connection section is configured such that after the brazing filler metal layer melts in the brazing furnace and causes the straight heat exchange section to settle slightly, the outer wall of the current collector still does not contact or interfere with the heat exchange substrate.

10. The assembly method according to claim 8, characterized in that, The bending die includes a lower die with an inclined forming surface; by controlling the angle of the inclined forming surface of the lower die, the lifting height of the bent connecting section away from the reference plane is precisely controlled, so that the lifting height is greater than or equal to the radius dimension of the current collecting component.

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