CN114649280B - Micro-channel radiator with gill bionic structure - Google Patents

Abstract

The invention discloses a micro-channel radiator with a gill bionic structure, which comprises a shell, an internal flow passage and a cooling working medium flowing through the internal flow passage, wherein the shell is provided with a plurality of grooves; one end of the shell is provided with a cooling working medium inlet, and the other end of the shell is provided with a cooling working medium outlet; at least one gill structure unit is arranged in the internal flow channel, and each gill structure unit at least comprises two comb-shaped fins which are stacked in parallel; the gill structure unit is transversely arranged in the internal flow channel; the comb-shaped fins comprise comb tooth parts facing the cooling working medium outlets and comb body parts located at the roots of the comb tooth parts. On one hand, the mixing of the cooling working media is enhanced by arranging a plurality of fins which are arranged in parallel; on the other hand, by arranging a plurality of tooth grooves and comb teeth, the convection heat exchange area is increased, but the pressure drop is not greatly increased, and the power consumption of the pump is not greatly increased; and moreover, the thickness of the fins along the flowing direction is increased, so that the heat exchange efficiency of the rear half part of the radiator is improved.

Description

A microchannel radiator with bionic structure of fish gills

technical field

The invention relates to the problem of heat dissipation with high heat flux density, in particular to a microchannel radiator with a bionic structure of fish gills, which can be applied to various application fields such as energy power, power electronics, chemical process, etc., especially in the field of integrated circuits.

Background technique

With the rapid progress of semiconductor technology, the integration of chips has been continuously improved, resulting in a surge in the amount of heat generated per unit area of the chip. Traditional cooling technologies such as air cooling, liquid cooling, heat pipe cooling, and semiconductor cooling have been difficult to meet the cooling needs of highly integrated chips. In view of this, the micro-channel cooling technology came into being. The micro-channel structure can bypass the chip package and directly cool the surface of the integrated circuit by constructing tiny channels on the silicon base layer of the chip that allow the cooling medium to pass directly, which provides a good cooling effect for the chip. s solution.

The main disadvantage of the existing parallel micro-channels is the limited cooling capacity, poor cooling effect for the high-power regions of the chip, and high temperature gradients, which can cause mechanical stress and lead to local warping of thin chips. Existing microneedle rib structures require high-power pumps, increasing energy consumption and cost, and creating potentially damaging mechanical stress on semiconductor devices.

The Chinese utility model patent with the application number CN212810289 U discloses a micro-channel heat sink with a special rib structure, which belongs to the technical field of heat exchangers. One end of the outflow structure is an inflow channel, and the other end is an outflow channel; the rib structure is arranged between the inflow channel and the outflow channel, including Z-shaped rib plates and straight rib plates arranged at intervals; Inlet and outlet of cooling medium. Through the micro-channels arranged at intervals between the straight fins and the Z-shaped fins, the boundary layer of the cooling medium is continuously destroyed, and a vortex is formed locally, which helps to improve the heat exchange efficiency of the heat sink. The technical solution of the example of the utility model, through the special inlet structure and the design of the micro-channel rib, makes the flow between the micro-channels evenly distributed. However, the vortex area formed at the right angle of the fins hinders the flow of the working fluid and is not conducive to the heat exchange of the channel. At the same time, the structure of the utility model includes numerous structures that expand and contract, resulting in high flow resistance. The structure has limited mechanical strength and is at risk of being damaged by the damaging mechanical stresses created by the high-power pump.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a micro-channel radiator with a simple and practical structure, which does not greatly increase the channel resistance under the premise of increasing the heat exchange area.

In order to achieve the above purpose, the present invention discloses a micro-channel radiator with a bionic structure of fish gills, which includes a shell, an internal flow channel and a cooling medium flowing through the internal flow channel, and one end of the shell is provided with a cooling device. A substance inlet, the other end is provided with a cooling medium outlet; at least one gill structural unit is provided in the internal flow channel, and each gill structural unit is composed of at least two comb-shaped fins arranged in parallel; the The gill structural units are laterally arranged in the internal flow channel; the comb-shaped fins include a comb tooth portion facing the outlet of the cooling medium and a comb body portion located at the root of the comb tooth portion.

Further, the casing is assembled from an upper cover plate and a groove-shaped lower casing, and the internal flow channel is a groove-shaped part of the lower casing.

Further, a plurality of the fish gill structural units are arranged in parallel and at equal intervals along the direction of the cooling medium flow.

Further, the number of fins on a single fish gill structural unit is 2 to 8.

Further, a gap is left between the upper and lower adjacent ribs.

Further, the adjacent two fins of the single fish gill structural unit are arranged in a dislocation arrangement along the direction of the flow of the cooling medium, and the dislocation distance d ₂ between the adjacent fins is greater than the width d ₃ of the comb body part .

Further, the comb tooth portions on the adjacent two fins of the single fish gill structural unit are arranged at a mutual offset in a direction perpendicular to the flow of the cooling medium.

Further, the cross-sectional area of the comb tooth portion and the comb body portion of each of the fins gradually increases smoothly along the flow direction of the cooling medium.

Further, the fins of the uppermost layer and the lowermost layer of the gill structural unit of the inner flow channel are respectively abutted against the upper and lower inner surfaces of the inner flow channel.

Further, the left and right ends of the fish gill structural unit are in contact with the left and right inner surfaces of the inner flow channel.

Compared with the prior art, the beneficial effects of the present invention:

1. The micro-channel radiator of the fish gill bionic structure of the present invention enhances the mixing of the cooling medium by setting multiple parallel fins up and down, so that it can better cool the high temperature area in the channel and strengthen the heat dissipation of the channel ability. At the same time, when the cooling medium flows through the fish gill structure, because the cooling medium is disturbed, the boundary layer is destroyed, and the heat transfer capacity of the micro-channel radiator is strengthened.

2. The micro-channel radiator of the fish gill bionic structure of the present invention ensures the uniformity of heat exchange, increases the heat exchange area of the micro-channel, and enhances the mixing of the cooling medium by setting a plurality of tooth slots and comb teeth. The heat transfer is enhanced, and the channel resistance will not be greatly increased due to the setting of the cogging structure that runs through in the direction perpendicular to the flow direction of the cooling medium.

3. By gradually increasing the thickness of the fins along the flow direction, the cross-sectional area of the cooling medium flowing through the path can be reduced, the speed of the cooling medium flow can be gradually increased, and the heat exchange efficiency of the second half of the radiator can be improved. Improve the overall temperature uniformity of the radiator.

4. The micro-channel radiator of the bionic structure of fish gills of the present invention can obtain better heat dissipation capacity by increasing the number of bionic structural units of fish gills and their upper comb teeth and tooth slots and increasing the thickness of the fins. It will cause the pump power consumption to increase. The present invention can meet the cooling requirements of different heat sources by adjusting the dimensions of the above structures, so that the power consumption of the pump is less increased and has strong applicability.

Description of drawings

1 is a schematic three-dimensional structure diagram of a microchannel according to Embodiment 1 of the present invention;

2 is a schematic three-dimensional structure diagram of a fin of a microchannel according to Embodiment 1 of the present invention;

3 is a right side view of the microchannel according to the first embodiment of the present invention;

Fig. 4 is the partial enlarged view of A in the right view of the microchannel according to the first embodiment of the present invention;

5 is a front view of the microchannel according to the first embodiment of the present invention;

6 is a schematic three-dimensional structure diagram of a microchannel according to Embodiment 1 of the present invention;

FIG. 7 is a partial enlarged view of B in the top view of the microchannel according to the first embodiment of the present invention;

8 is a schematic three-dimensional structure diagram of a microchannel according to Embodiment 2 of the present invention;

Fig. 9 is the left side view of the microchannel of the second embodiment of the present invention;

10 is a schematic three-dimensional structure diagram of a microchannel according to Embodiment 3 of the present invention;

11 is a top view of the first rib in the microchannel according to the third embodiment of the present invention;

12 is a top view of the second rib in the microchannel according to the third embodiment of the present invention;

13 is a front view of a microchannel according to Embodiment 3 of the present invention;

Fig. 14 is the right side view of the microchannel according to the third embodiment of the present invention;

Fig. 15 is the isotherm cloud diagram of the microchannel according to the first embodiment of the present invention;

FIG. 16 is an isotherm diagram of the microchannel according to the third embodiment of the present invention.

Reference signs: 1. Shell; 2. Internal flow channel; 3. Fish gill structural unit; 3.1, First fin; 3.2, Second fin; 3.3, Third fin; 3.4, Fourth fin; 4. Comb tooth part; 4.1. Comb tooth; 4.2. Tooth slot; 5. Comb body part; 6. Straight part; 7. Cooling medium inlet; 8. Cooling medium outlet.

Detailed ways

The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example 1

Referring to FIG. 1 , the cooling micro-channel radiator of the rib-row bionic structure of the present invention includes: a casing 1 , an inner flow channel 2 and a cooling medium flowing through the inner flow channel 2 .

The direction of each embodiment in the present invention takes FIG. 1 as a reference system, and the direction of the cooling medium flow is the direction from the cooling medium inlet 7 to the cooling medium outlet 8, and the cooling medium inlet 7 and the cooling medium flow direction. The connection direction of the working medium outlet 8 is the longitudinal direction; the transverse direction is based on the plane of the upper cover plate, which is perpendicular to the longitudinal direction. The lateral direction is the left and right ends, the end where the cooling medium inlet and outlet are located is the upper end, the other end where the shell 1 is located is the lower end, and the end close to the cooling medium inlet 7 is the front end, away from the The other end of the cooling medium outlet 8 is the rear end, and the front and rear ends are the longitudinal directions.

The casing 1 is divided into an upper layer cover plate and a lower layer casing whose size is matched with the upper layer cover plate; one end of the upper layer cover plate is provided with a cooling medium inlet 7 , and the other end is provided with a cooling medium outlet 8 . Wherein, the lower shell has a concave accommodating space, and in this embodiment, the lower shell is a rectangular groove body. The four sides of the accommodating space are the outer walls of the radiator, and the inner flow channel 2 is arranged on the upper surface of the lower shell. The cooling medium inlet 7 and the cooling medium outlet 8 are both set as circular holes, and the axis of the cooling medium inlet and outlet is perpendicular to the bottom surface of the lower shell.

In this embodiment, as shown in FIGS. 1 to 2 , four gill structural units 3 arranged in parallel and at equal intervals are sequentially arranged in the internal flow channel 2 between the cooling medium inlet 7 and the cooling medium outlet 8 , the fish gill structural unit 3 is symmetrically arranged up and down with the horizontal center plane of the internal flow channel 2 as the reference plane, and the first fins 3.1, the second fins 3.2, and the third fins 3.3 are arranged in order from top to bottom. and a fourth rib 3.4, wherein the first rib 3.1 and the second rib 3.2 are disposed above the reference plane in a longitudinal direction staggered, and the third rib 3.3 and the fourth rib 3.4 are arranged in the longitudinal direction The misalignment is provided below the reference plane. In this embodiment, the second rib 3.2 and the third rib 3.3 are aligned up and down, and the second rib 3.2 and the third rib 3.3 can also be combined into a whole rib for arrangement. Each of the gill structural units 3 is laterally arranged in the inner flow channel 2 . The invention ensures the uniformity of heat dissipation by arranging four fish gill structural units distributed at equal intervals, and the four fins arranged symmetrically at the upper and lower positions enhance the mixing of the cooling medium, so that the cooling channel can be better The high temperature area within the channel strengthens the heat dissipation capacity of the channel. At the same time, when the cooling medium flows through the fish gill structure, because the cooling medium is disturbed, the boundary layer is destroyed, and the heat transfer capacity of the micro-channel radiator is strengthened.

In this embodiment, FIG. 2 is a schematic perspective view of a single piece of rib, and the single piece of fin includes a comb tooth portion 4 and a comb body portion 5 located at the root of the comb tooth portion. 2 to 5, it can be seen that the comb tooth portion 4 is divided into a plurality of comb teeth 4.1 and a plurality of tooth slots 4.2 passing through in a direction perpendicular to the flow of the cooling medium, and the plurality of the comb teeth 4.1 and the tooth slots 4.2 are in sequence. Arranged in a staggered manner, the comb teeth 4 . 1 are directed toward one side of the cooling medium outlet 8 . In this embodiment, the dislocation distance d ₂ between the upper and lower adjacent fins along the flow direction of the cooling medium is greater than the width d ₃ of the comb body portion 5 , so that the cooling medium can smoothly flow from the tooth slots 4.2 Pass. The number, position and specific size of the comb teeth 4.1 and the tooth slots 4.2 can be adjusted and arranged according to actual needs. By setting a plurality of tooth slots and comb teeth, the invention ensures the uniformity of heat exchange, increases the heat exchange area of the micro-channel, and enhances the mixing of the cooling medium, thereby enhancing the heat transfer. The cogging structure that runs through the working fluid flow direction will not greatly increase the channel resistance.

In this embodiment, the number of fins in a single fish gill structural unit 3 is four, but any value from two to eight can also be used to meet the actual heat dissipation needs.

In this embodiment, FIG. 3 is a right side view of the microchannel of this embodiment, and FIG. 4 is an enlarged view of the position A in FIG. 3 . The direction of working fluid flow gradually increases smoothly. By gradually increasing the thickness of the fins along the flow direction, the present invention can reduce the cross-sectional area of the path through which the cooling medium flows, so that the flow speed of the cooling medium can be gradually increased, thereby improving the heat exchange efficiency of the second half of the radiator, and further Improve the overall temperature uniformity of the radiator.

In this embodiment, the upstream surface of the upper end of the comb body portion 5 is a smooth transition arc surface, and this design can reduce the resistance encountered when the cooling medium flows.

In this embodiment, the cooling medium is water, but any one of an aqueous solution containing nano-metal particles, a freon, a suspension of carbon nanotubes, or a suspension of graphene can also be used.

In this embodiment, as shown in FIGS. 4-7 , the length L of the microchannel radiator of the fish gill bionic structure is 16.5 mm, the width W is 10 mm, the height H is 1 mm, and the diameter D of the cooling medium inlet and outlet is 1 mm. _The distance L2 from the gill structural unit ₃ to the wall at the inlet is the same as the distance L1 from the wall at the outlet.

As shown in FIG. 4 , the width d ₄ of the comb portion 4 is four times the width d ₃ of the comb portion 5 . The dislocation distance d ₂ between the third fins 3.3 and the fourth fins 3.4 is the same as the distance d ₁ between two adjacent gill structural units 3 to ensure the overall heat dissipation. It can be seen from the figure that the dislocation distance _d2 between the third fin 3.3 and the fourth fin 3.4 is greater than the width d3 of the comb body part ₅ so that the cooling medium can smoothly flow through the fish through the tooth slot 4.2 Gill Structural Unit 3.

It can be seen from FIG. 4 that there is a gap between the adjacent upper and lower fins. In this embodiment, the gap is 0.05mm. Of course, other values less than 0.1mm can also be used to facilitate the passage of the coolant and reduce the resistance. It is also possible to adopt a plan that does not leave gaps according to the actual situation.

In this embodiment, as shown in FIGS. 6 to 7 , the width w ₂ of the tooth slots 4.2 is the same as the width w ₁ of the comb teeth 4.1.

In this embodiment, the upper side of the first fin 3.1 and the lower side of the fourth fin 3.4 are in contact with the inner surfaces of the upper cover plate and the lower shell respectively, so as to avoid forming long and narrow slits and affecting the convection of the cooling medium heat exchange.

In this embodiment, as shown in Figures 5 to 6, the comb teeth 4.1 at the left and right ends of the four fins on the single fish gill structural unit 3 and the comb body part 5 are in contact with the left and right side walls of the internal flow channel 2, and to fix the rib.

In this embodiment, the shell 1 and the shell thickness of the cooling medium inlet and outlet are the same, so as to ensure the uniformity of the overall heat dissipation.

In this embodiment, the materials of the shell 1 and the gill structural unit 3 are all siliceous. Silicon is widely used in the semiconductor industry due to its abundant reserves in nature, low purification cost, and more stable properties at high temperature than other semi-metallic elements. At the same time, silicon has good thermal conductivity, corrosion resistance and easy processing. However, the material can also be any one or two or more of copper, iron, silver, aluminum, zinc, nickel alloy, silicon carbide, diamond, graphene, carbon nanotube, and composite materials according to the actual situation.

Embodiment 2

Figures 8 to 9 are the schematic diagram and the left side view of the three-dimensional structure of the microchannel radiator of the bionic structure of fish gills according to the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the number of a single gill structural unit 3 in this embodiment is two, and each gill structural unit 3 is composed of first fins 3.1 stacked in parallel and displaced in sequence along the longitudinal direction. , a second rib 3.2 and a third rib 3.3, wherein the second rib 3.2 is arranged symmetrically up and down with the horizontal middle plane of the inner flow channel 2 as a reference. Compared with the first embodiment, the second embodiment can reduce the resistance of the cooling working fluid when it flows, so as to meet the cooling requirements of different heat sources.

Embodiment 3

10-14 are schematic diagrams of Embodiment 3 of the present invention. The difference between this embodiment and Embodiment 1 lies in the following points.

As shown in FIG. 10 , according to actual heat dissipation requirements, the number of fish gill structural units 3 in this embodiment is only one. The fish gill structural unit 3 is provided with four fins, the middle second fin 3.2 and the third fin 3.3 have the same structure, and the uppermost first fin 3.1 and the lowermost fourth fin 3.4 have the same structure. The top views of the fins are shown in Figures 11-12, wherein the shape of the first rib 3.1 in Figure 11 is the same as that in the first embodiment; Figure 12 is a top view of the second rib 3.2, wherein the middle part is straight Part 6, the straight part 6 is not provided with tooth slots 4.2, and the straight part 6 is combined with the comb body part 5 as a whole. Through the arrangement of the straight portion 6, the number of tooth slots 4.2 on the two middle fins is reduced, and the cooling medium is forced to flow through the first fin 3.1 above or the fourth fin 3.4 below, so as to meet the distribution of different heat sources. needs.

FIG. 13 is a front view of the microchannel of this embodiment. It can be seen from Figures 11 and 12 that the width of the leftmost or rightmost comb teeth 4.1 in the first fin 3.1 or the fourth rib 3.4 is twice the width of the comb teeth 4.1 in the same position of the other two fins, so that it is just right The upper and lower tooth slots 4.2 are displaced from each other. This embodiment can increase the disturbance of the cooling medium and further increase the heat dissipation performance of the micro-channel heat sink through the arrangement of the upper and lower dislocation tooth slots.

14 is a right side view of the microchannel of this embodiment. It can be seen from the figure that there are intervals between the fins, and the interval near the cooling medium inlet 7 is large, and the interval near the cooling medium outlet 8 is small.

Tables 1 and 2 and Figures 15 and 16 are respectively the data result diagrams and the isotherm cloud diagrams with an inlet flow rate of 0.5 g/s of the simulation experiments performed by using COMSOL software in Embodiments 1 and 3 according to the embodiment of the present invention.

In this embodiment, the material of the micro-channel heat sink is silicon. This simulation experiment makes the following simplified assumptions:

(1) The flow and heat transfer of the cooling medium are in a steady state, the cooling medium is incompressible, and the flow state is laminar flow;

(2) Solid materials have constant physical properties, and solid thermal conductive materials are isotropic;

(3) The no-slip boundary condition is adopted for the wall of the runner;

(4) Regardless of gravity, dissipated heat caused by radiative heat transfer and viscous dissipation is not considered.

The boundary conditions are as follows:

(1) The flow and heat transfer are fully developed, and the inlet water temperature is constant;

(2) The inlet flow is 0.5g/s~1g/s;

(3) Outlet: pressure outlet condition;

(4) For a given heat source power of 100W, the outer wall of the heat sink is insulated except for the position in contact with the chip.

It can be seen from Tables 1 and 2 that when the mass flow rate changes from 0.5g/s to 1g/s, with the increase of the inlet mass flow rate, the heat transfer capacity of the heat sink increases, the convective heat transfer coefficient increases, and the band on the unit area increases. Walk more calories. In the third embodiment, since the number of tooth slots 4.2 on the second fins 3.2 and the third fins 3.3 located in the middle of the fish gill structural unit 3 is reduced, the cooling medium is forced to flow from the upper and lower first fins 3.1 and 3.1. The slots 4.2 in the fourth rib 3.4 flow through. Because the upper and lower fins are closer to the heat source and the temperature is higher, more cooling medium flows through the upper and lower fins, which strengthens the overall heat exchange capacity of the radiator. But at the same time, due to the reduction of the cogging 4.2, the obstruction of the fins to the cooling medium increases, and the channel pressure drop increases.

It can be seen from Figures 15-16 that when the mass flow rate is fixed at 0.5 g/s, the temperature distribution of the third embodiment is more uniform than that of the first embodiment. The setting of the tooth slot 4.2 can widen the flow path of the cooling medium, and has the effect of reducing drag, but the setting of too many tooth slots 4.2 will cause the temperature at the center of the channel to be higher, thereby reducing the cooling capacity of the channel. The fins use a straight part 6, and the upper and lower tooth slots are arranged in a dislocation form, which increases the flow of the cooling medium and balances the cooling capacity and pressure drop of the channel.

The second fins 3.2 and the third fins 3.3 in the middle of the single gill structural unit 3 in the first and third embodiments of the present invention can be combined into an integral fin symmetrically arranged along the central plane of the internal flow channel 2 .

The micro-channel radiator of the bionic structure of fish gills of the present invention can obtain better heat dissipation capability by increasing the number of bionic structural units of fish gills and their upper comb teeth and tooth slots, and increasing the thickness of the fins, but this will cause The power consumption of the pump increases. The present invention can meet the cooling requirements of different heat sources by adjusting the dimensions of the above structures, so that the power consumption of the pump is less increased and has strong applicability.

The microchannel radiator of the fish gill bionic structure of the present invention can be integrally formed by 3D printing.

In the description of this application, it should be understood that the orientations indicated by the orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. Or the positional relationship is usually based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and these orientations do not indicate or imply the indicated device or element unless otherwise stated. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various variations or modifications within the scope of the claims, which do not affect the essential content of the present invention. At the same time, integrated circuits are only one of the application fields to which the present invention is applicable. Various application fields such as energy power, power electronics, and chemical processes all have similar heat dissipation requirements. Those skilled in the art can use the concept and deformation or improvement of the present invention to effectively dissipate heat. .

Claims (10)

1. A micro-channel radiator with a bionic structure of fish gills, comprising a shell (1), an internal flow channel (2) and a cooling medium flowing through the internal flow channel (2); it is characterized in that: One end of the casing (1) is provided with a cooling medium inlet (7), and the other end is provided with a cooling medium outlet (8); At least one gill structural unit (3) is provided in the internal flow channel (2), and each gill structural unit (3) is at least composed of two comb-shaped fins stacked in parallel; The fish gill structural unit (3) is laterally arranged in the internal flow channel (2); the comb-shaped fins include a comb-tooth portion (4) facing the cooling medium outlet (8) and a comb-tooth portion (4) located on the comb-tooth Part of the comb body at the root (5). 2 . The microchannel radiator of fish gill biomimetic structure according to claim 1 , wherein the shell ( 1 ) is assembled from an upper cover plate and a groove-shaped lower shell, and the inner flow The channel (2) is the groove-shaped part of the lower shell. 3 . The micro-channel radiator of fish gill biomimetic structure according to claim 1 , characterized in that: a plurality of the fish gill structural units ( 3 ) are arranged in parallel and at equal intervals along the flow direction of the internal flow channel ( 2 ). 4 . 4 . The micro-channel radiator of fish gill biomimetic structure according to claim 1 , wherein the number of ribs on a single fish gill structural unit ( 3 ) is 2 to 8. 5 . 5 . The microchannel radiator of fish gill biomimetic structure according to claim 4 , wherein a gap is left between the upper and lower adjacent fins. 6 . 6 . The microchannel radiator of fish gill biomimetic structure according to claim 1 , wherein the radiator flowing along the internal flow channel ( 2 ) between two adjacent fins of a single fish gill structural unit ( 3 ) The directions are staggered and arranged, and the staggered distance d ₂ between the adjacent fins is greater than the width d ₃ of the comb body part (5). 7 . The microchannel radiator of fish gill biomimetic structure according to claim 1 , characterized in that: the comb tooth portion ( 4 ) on the adjacent two fins of the single fish gill structural unit ( 3 ) is perpendicular to the cooling The working fluids are arranged in mutual dislocations in the direction of flow. 8 . The microchannel radiator of fish gill biomimetic structure according to claim 1 , wherein the cross-sectional area of the comb tooth portion ( 4 ) and the comb body portion ( 5 ) of each of the fins is along the cooling process. 9 . The direction of mass flow gradually increases smoothly. 9 . The microchannel radiator of fish gill biomimetic structure according to claim 1 , wherein the fins of the uppermost layer and the lowermost layer of the fish gill structural unit (3) of the internal flow channel (2) are respectively The upper and lower inner surfaces of the inner flow channel (2) are in abutment. 10 . The micro-channel radiator of fish gill biomimetic structure according to claim 1 , wherein the left and right ends of the fish gill structural unit ( 3 ) and the left and right inner surfaces of the internal flow channel ( 2 ) Abut.

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