Variable cross-section biomimetic fin of heat exchanger

Abstract

This utility model discloses a biomimetic fin with variable cross-section for a heat exchanger, comprising: a tree-like fin assembly structure to facilitate efficient heat exchange; the shape of the root heat exchange fins combined with multiple branched heat exchange plates to form a tree-like vein heat exchange structure, which fully expands the contact area, thereby achieving a basic heat dissipation effect; the shape memory alloy heat exchange strips can adaptively adjust themselves at any time using the characteristics of their nickel-titanium alloy material, which helps improve the heat exchange effect of the tree-like fin assembly; and the nanofiber layer and sharkskin rib-like micro-hook grooves can optimize the heat flow through using their biomimetic structure, thereby solving the problem of boundary layer thickening when heat flow passes through, and improving the functionality of the device.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a variable cross-section biomimetic fin for a heat exchanger. Background Technology

[0002] A heat exchanger is a key industrial device for transferring heat between two or more fluids at different temperatures. It separates hot and cold fluids through solid walls (such as tubes or plates), utilizing the principles of heat conduction and convection to transfer heat from the high-temperature fluid to the low-temperature fluid without mixing the fluids themselves. Its main functions include heating, cooling, condensation, evaporation, and heat recovery. Common types include shell-and-tube, plate, and finned-tube heat exchangers, depending on their structure and operating principle. Heat exchangers are widely used in numerous fields such as petrochemicals, power generation, HVAC, food and pharmaceuticals, metallurgy, shipbuilding, and automobiles. They are core devices for achieving efficient energy utilization, process temperature control, and system energy saving. Variable cross-section biomimetic fins in heat exchangers, through optimized structures mimicking those found in nature, play a crucial role in enhancing heat transfer, reducing energy consumption, and improving reliability.

[0003] However, existing technologies still have significant shortcomings, such as:

[0004] Existing variable cross-section biomimetic fins only optimize the macroscopic flow channel and do not solve the problem of boundary layer thickening caused by micro-nano scale surface effects, which leads to a decrease in heat exchange efficiency. Moreover, they are relatively fragile and are prone to significant deformation when subjected to impact, which can render them unusable. To address this, we propose a variable cross-section biomimetic fin for heat exchangers. Utility Model Content

[0005] The purpose of this invention is to provide a biomimetic fin with variable cross-section for a heat exchanger to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A biomimetic fin with variable cross-section for a heat exchanger includes a mounting base, characterized in that: a tree-shaped fin assembly is fixedly connected to the top of the mounting base, a reinforcing component for reinforcement is provided on the inner wall of the tree-shaped fin assembly, a canopy top plate for auxiliary heat exchange is fixed on both sides of the top of the tree-shaped fin assembly, and fixing nails for fixing are evenly distributed at the four corners of the top of the canopy top plate.

[0008] Preferably, the tree-shaped fin assembly includes a connecting base fixed to the top of the mounting base, a trunk fixing base fixedly connected to the top of the connecting base, root heat exchange fins fixedly connected to both sides of the trunk fixing base, and multiple branched heat exchange plates fixedly connected to one side of each root heat exchange fin. The root heat exchange fins and the branched heat exchange plates are interconnected and distributed in a tree-branch shape.

[0009] Preferably, a shape memory alloy heat exchange strip is fixedly connected at the fixed junction of the root heat exchange fins and the bifurcated heat exchange plate. The shape memory alloy heat exchange strip is made of nickel-titanium alloy material. Reinforcing plates are fixedly connected to both sides of the shape memory alloy heat exchange strip. A nanofiber layer is fixedly connected to the surface of the external bifurcated heat exchange plate. Shark skin rib-shaped microgrooves are formed on the inner wall of the bifurcated heat exchange plate.

[0010] Preferably, the reinforcement component includes multiple connecting plates fixed on both sides of the trunk fixing base, and a honeycomb structure patch plate is fixedly connected to one side of each of the multiple connecting plates. The shape of the honeycomb structure patch plate is combined with the shape of the root heat exchange fins and the branched heat exchange plate to form a honeycomb shape.

[0011] Preferably, the honeycomb structure patch plate and the corresponding branched heat exchange plate form a honeycomb-shaped inner wall that is fixedly connected to a wavy skeleton mesh, and the internal intersections of the wavy skeleton mesh are all fixedly connected to cross-buffered balls for buffering.

[0012] Preferably, the inner wall of the trunk fixing base is provided with a heat exchange space, and the inner wall of the heat exchange space is fixedly connected with a plurality of partition plates for reinforcement. The multiple spaces formed by the heat exchange space and the partition plates are located at the bottom between the multiple canopy top plates.

[0013] Preferably, the top of the tree-shaped fin assembly is fixedly connected to multiple connecting heat exchange bases, and the top of each connecting heat exchange base is fixedly connected to multiple multi-layer heat exchange fins. The canopy top plate, the connecting heat exchange bases, and the multi-layer heat exchange fins are combined to form a canopy shape.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The tree-like fin assembly structure facilitates high-efficiency heat exchange. The shape of the root heat exchange fins, combined with multiple branched heat exchange plates, forms a tree-like heat exchange structure. This structure maximizes the contact area, achieving basic heat dissipation. The shape memory alloy heat exchange strips can adaptively adjust themselves based on the characteristics of their nickel-titanium alloy material, further enhancing the heat exchange efficiency of the tree-like fin assembly. Meanwhile, the nanofiber layer and sharkskin-like ribbed micro-hook grooves optimize the heat flow through their biomimetic structure, addressing the boundary layer thickening issue and improving the device's functionality.

[0016] 2. The structure of the dendritic fin assembly is reinforced by strengthening the structure of the reinforcing component. The honeycomb structure patch is fixed to the bottom of the root heat exchange fins and the branched heat exchange plate using the connecting plate, thus forming a new biomimetic honeycomb structure. The stability of the honeycomb structure is used to strengthen and stabilize the entire dendritic fin assembly during use. When the heat exchanger starts up and generates high-frequency vibrations, the wave-shaped skeleton mesh fixed inside the honeycomb structure can also buffer and disperse the stress generated by the vibration. In addition, the cross-buffered balls at the intersection of the internal mesh further improve the overall reinforcement and buffering effect of the reinforcing component, thereby increasing the stability of the dendritic fin assembly. Attached Figure Description

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

[0018] Figure 2 This is a disassembled internal diagram of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the tree-shaped fin assembly in the structure of this utility model;

[0020] Figure 4 This is a schematic diagram showing the splicing of the tree-shaped fin assembly and the reinforcing assembly in the structure of this utility model;

[0021] Figure 5 This is a partially enlarged schematic diagram of the reinforcing component in the structure of this utility model.

[0022] In the diagram: 1. Mounting base; 2. Tree-shaped fin assembly; 201. Connecting base; 202. Trunk fixing base; 203. Root heat exchange fins; 204. Shape memory alloy heat exchange strips; 205. Reinforcing plate; 206. Bifurcation heat exchange plate; 207. Nanofiber layer; 208. Shark skin rib-shaped microgrooves; 3. Reinforcing component; 301. Connecting plate; 302. Honeycomb structure patch plate; 303. Corrugated skeleton mesh; 304. Cross buffer balls; 4. Heat exchange space; 5. Divider plate; 6. Canopy top plate; 7. Fixing nail; 8. Connecting heat exchange base; 9. Multi-layer heat exchange fins. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-5 This utility model provides a technical solution:

[0025] A biomimetic fin with variable cross-section for a heat exchanger includes: a mounting base 1, characterized in that: a tree-shaped fin assembly 2 is fixedly connected to the top of the mounting base 1, a reinforcing component 3 for reinforcement is provided on the inner wall of the tree-shaped fin assembly 2, a canopy top plate 6 for auxiliary heat exchange is fixed on both sides of the top of the tree-shaped fin assembly 2, and fixing nails 7 for fixing are evenly distributed at the four corners of the top of the canopy top plate 6.

[0026] In this embodiment, the mounting base 1 can provide bottom fixation for the tree-shaped fin assembly 2. The tree-shaped fin assembly 2 can accelerate heat exchange of the flow that needs to be cooled more efficiently by utilizing its own structure, and optimize and alleviate the boundary layer thickening effect generated when the heat flow passes through the surface of the device by utilizing its own structure, thereby improving the overall functionality of the device. At the same time, in conjunction with the reinforcement component 3, the structure of the tree-shaped fin assembly 2 is further reinforced during use, and the stress concentration caused by high-frequency vibration generated during the use of the heat exchanger is dispersed by utilizing its own structure, thereby further improving the overall functionality and service life of the device. Meanwhile, the canopy top plate 6, together with the fixing nails 7, can further reinforce the entire device from the top.

[0027] The tree-shaped fin assembly 2 includes a connecting base 201 fixed to the top of the mounting base 1. A trunk fixing base 202 is fixedly connected to the top of the connecting base 201. Root heat exchange fins 203 are fixedly connected to both sides of the trunk fixing base 202. Multiple branched heat exchange plates 206 are fixedly connected to one side of each root heat exchange fin 203. The root heat exchange fins 203 and the branched heat exchange plates 206 are interconnected and distributed in a tree-branch shape.

[0028] In this embodiment, the tree-shaped fin assembly 2 is fixed to the top of the mounting base 1 by the connecting base 201. At the same time, the trunk fixing base 202 provides a stable base for the installation of the tree-shaped fin assembly 2. The shape of the root heat exchange fins 203, together with multiple branched heat exchange plates 206, forms a tree-like heat exchange structure. This structure is used to fully expand the contact area, thereby achieving a basic heat dissipation effect.

[0029] A shape memory alloy heat exchange strip 204 is fixedly connected at the fixed junction of the root heat exchange fin 203 and the bifurcated heat exchange plate 206. The shape memory alloy heat exchange strip 204 is made of nickel-titanium alloy material. Reinforcing plates 205 are fixedly connected to both sides of the shape memory alloy heat exchange strip 204. A nano-fiber layer 207 is fixedly connected to the surface of the outer bifurcated heat exchange plate 206. Shark skin rib-shaped microgrooves 208 are opened on the inner wall of the bifurcated heat exchange plate 206.

[0030] In this embodiment, the shape memory alloy heat exchange strip 204, connected between the root heat exchange fins 203 and multiple branched heat exchange plates 206, can adaptively adjust itself at any time by utilizing the characteristics of its nickel-titanium alloy material. At low temperatures, it expands its volume using the principle of thermal expansion and contraction of its material to help reduce the flow rate. At high temperatures, it reduces its volume using its material to help the flow rate pass through quickly. This change helps improve the heat exchange effect of the dendritic fin assembly 2. The reinforcing plate 205 can install and reinforce the shape memory alloy heat exchange strip 204. The nanofiber layer 207 and the sharkskin rib-shaped microgrooves 208 can optimize the heat flow by utilizing their biomimetic structure. By using their shape and the structure of multiple fibers, they can disrupt the viscous bottom layer of the flow and regulate the phase change behavior. The biomimetic prototype of the nanofiber layer 207 is lotus leaf fibers, which increases the biomimetic performance of the device itself and solves the problem of boundary layer thickening when heat flow passes through, thereby improving the functionality of the device.

[0031] The reinforcement component 3 includes multiple connecting plates 301 fixed on both sides of the trunk fixing base 202. A honeycomb structure patch plate 302 is fixedly connected to one side of each of the multiple connecting plates 301. The shape of the honeycomb structure patch plate 302 is combined with the shape of the root heat exchange fins 203 and the branched heat exchange plate 206 to form a honeycomb shape.

[0032] In this embodiment, the reinforcement component 3 uses the connecting plate 301 to fix the honeycomb structure patch plate 302 to the bottom of the root heat exchange fin 203 and the branched heat exchange plate 206, thereby forming a new biomimetic honeycomb structure. The stability of the honeycomb structure is used to reinforce and stabilize the entire tree-shaped fin assembly 2 during use.

[0033] The honeycomb structure patch plate 302 and its corresponding branched heat exchange plate 206 form a honeycomb-shaped inner wall that is fixedly connected to a wavy skeleton mesh 303. At the intersections of the wavy skeleton mesh 303, cross-buffered balls 304 for buffering are fixedly connected.

[0034] In this embodiment, when the heat exchanger starts up and generates relatively high-frequency vibrations, the wave-shaped skeleton mesh 303 fixed inside the honeycomb structure can also buffer and disperse the stress generated by vibrations, and in conjunction with the cross buffer balls 304 at the cross intersections of the internal mesh, further improve the overall reinforcement and buffering effect of the reinforcement component 3, thereby increasing the stability of the tree-shaped fin assembly 2.

[0035] The inner wall of the trunk fixing base 202 is provided with a heat exchange space 4. Multiple partition plates 5 for reinforcement are fixedly connected to the inner wall of the heat exchange space 4. The multiple spaces formed by the heat exchange space 4 and the partition plates 5 are located at the bottom between multiple canopy top plates 6.

[0036] In this embodiment, the heat exchange space 4 and the partition plate 5 that separates the internal space can transfer heat to the top in multiple layers as it passes through, thereby further improving the overall heat exchange effect of the device.

[0037] The top of the tree-shaped fin assembly 2 is fixedly connected to multiple heat exchange bases 8, and the top of each heat exchange base 8 is fixedly connected to multiple multi-layer heat exchange fins 9. The canopy top plate 6, the heat exchange bases 8 and the multi-layer heat exchange fins 9 are combined to form a canopy shape.

[0038] In this embodiment, connecting the heat exchange base 8 and the multi-layer heat exchange fins 9 can help to transfer heat from the top in multiple layers. In addition, in conjunction with the structure of the tree-shaped fin assembly 2, the whole device is formed into a tree-shaped biomimetic structure. The heat exchange performance of the device is further improved by using this tree-shaped biomimetic structure and the gap in the middle, thereby improving the functionality of the device.

[0039] Working principle: The device uses the mounting base 1 to fix the tree-shaped fin assembly 2, and uses the structure of the nanofiber layer 207 and sharkskin rib-like microgrooves 208 inside the tree-shaped fin assembly 2 to break the viscous bottom layer through which heat flows, thereby regulating the phase change behavior. The structure itself, together with the reinforcing component 3, forms a new biomimetic honeycomb structure, which strengthens the overall use of the device. At the same time, the tree-shaped fin assembly 2, together with the top canopy plate 6, the heat exchange base 8, and the multi-layer heat exchange fins 9, form a complete tree shape, thereby improving the biomimetic effect and heat exchange efficiency of the device.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger with variable cross-section biomimetic fins, comprising a mounting base (1), characterized in that: The top of the mounting base (1) is fixedly connected to a tree-shaped fin assembly (2), and the inner wall of the tree-shaped fin assembly (2) is provided with a reinforcing assembly (3) for reinforcement. Both sides of the top of the tree-shaped fin assembly (2) are fixed with a canopy plate (6) for auxiliary heat exchange, and fixing nails (7) for fixing are evenly distributed at the four corners of the top of the canopy plate (6).

2. The heat exchanger variable cross-section biomimetic fin according to claim 1, characterized in that: The tree-shaped fin assembly (2) includes a connecting base (201) fixed to the top of the mounting base (1). A trunk fixing base (202) is fixedly connected to the top of the connecting base (201). Root heat exchange fins (203) are fixedly connected to both sides of the trunk fixing base (202). Multiple branched heat exchange plates (206) are fixedly connected to one side of each root heat exchange fin (203). The root heat exchange fins (203) and the branched heat exchange plates (206) are interconnected and distributed in a tree-branch shape.

3. The heat exchanger variable cross-section biomimetic fin according to claim 2, characterized in that: A shape memory alloy heat exchange strip (204) is fixedly connected at the fixed junction of the root heat exchange fin (203) and the branched heat exchange plate (206). The shape memory alloy heat exchange strip (204) is made of nickel-titanium alloy material. Reinforcing plates (205) are fixedly connected to both sides of the shape memory alloy heat exchange strip (204). A nanofiber layer (207) is fixedly connected to the surface of the external branched heat exchange plate (206). Shark skin rib-shaped microgrooves (208) are formed on the inner wall of the branched heat exchange plate (206).

4. The heat exchanger variable cross-section biomimetic fin according to claim 3, characterized in that: The reinforcement component (3) includes multiple connecting plates (301) fixed on both sides of the trunk fixing base (202). A honeycomb structure patch plate (302) is fixedly connected to one side of each of the multiple connecting plates (301). The shape of the honeycomb structure patch plate (302) is combined with the shape of the root heat exchange fins (203) and the branched heat exchange plate (206) to form a honeycomb shape.

5. The heat exchanger variable cross-section biomimetic fin according to claim 4, characterized in that: The honeycomb structure patch (302) and the bifurcated heat exchange plate (206) form a honeycomb-shaped inner wall and are fixedly connected to a wavy skeleton mesh (303). The wavy skeleton mesh (303) is fixedly connected to cross buffer balls (304) for buffering at the internal intersections.

6. The heat exchanger variable cross-section biomimetic fin according to claim 5, characterized in that: The inner wall of the trunk fixing base (202) is provided with a heat exchange space (4), and the inner wall of the heat exchange space (4) is fixedly connected with a plurality of partition plates (5) for reinforcement. The multiple spaces formed by the heat exchange space (4) and the partition plates (5) are located at the bottom between the multiple canopy top plates (6).

7. The heat exchanger variable cross-section biomimetic fin according to claim 1, characterized in that: The top of the tree-shaped fin assembly (2) is fixedly connected to multiple heat exchange bases (8), and the top of each heat exchange base (8) is fixedly connected to multiple multi-layer heat exchange fins (9). The canopy top plate (6) is combined with the heat exchange bases (8) and the multi-layer heat exchange fins (9) to form a canopy shape.

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