Modularized bionic fractal compact deep sea power cold source device and working method

Abstract

The invention discloses a modular bionic fractal compact deep sea power cold source device and a working method, and belongs to the technical field of coolers. According to the device, the heat exchange core plate is formed by arraying the imitated honeycomb cell elements in the horizontal and vertical directions. When the device works, a cold-side medium enters from the cold-side inlet, enters the fractal flow channel in the first-pass heat exchange core body after being blocked by the pass partition plate, and flows into the rear end cover mixing chamber to be mixed; and then the air flows into the second-pass heat exchange core body and flows out from a cold side outlet. When a cold-side medium flows, the hot-side medium enters from the hot-side inlet, the flowing direction of the hot-side medium is opposite to that of the cold-side medium, and the hot-side medium flows through the outer baffling wall surface of the two-way honeycomb-imitating fractal heat exchange core body, exchanges heat with the internal cold-side medium and finally flows out from the hot-side outlet. The device is used for improving the cooling efficiency of a deep sea power system by combining natural honeycomb characteristics and fractal flow characteristics, and has good adaptability and reliability under extreme working conditions of deep sea high pressure, low temperature, limited space and the like.

Description

Technical Field

[0001] This invention relates to the field of cooler technology, and in particular to a modular biomimetic fractal compact deep-sea power cooling source device and its working method. Background Technology

[0002] With the rapid development of deep-sea exploration, deep-sea resource development, and deep-sea propulsion systems, the operational reliability and energy efficiency of deep-sea equipment in extreme environments face severe challenges. The deep-sea environment, characterized by high pressure, low temperature, and limited space, places extremely high demands on the thermal management of propulsion systems. Traditional cooling devices mostly employ shell-and-tube heat exchange structures, which generally suffer from problems such as large size, heavy weight, low heat exchange efficiency, and insufficient compactness, making it difficult to meet the high power density, long endurance, and high reliability requirements of deep-sea equipment.

[0003] In recent years, bionics and fractal geometry have shown great potential in the field of heat transfer optimization. (The last sentence appears to be incomplete and unrelated to the preceding text.) Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies by proposing a modular, biomimetic fractal compact deep-sea power cooling device. The honeycomb structure possesses high specific strength, excellent space-filling ratio, and good thermodynamic properties. The fractal flow channel, through a self-similar multi-scale branching network, achieves uniform fluid distribution and enhanced convective heat transfer, significantly improving heat transfer efficiency per unit volume. Therefore, based on biomimetic fractal theory, the design of a novel biomimetic fractal compact deep-sea power energy device is of great significance for improving the operational efficiency, safety, and endurance of deep-sea equipment.

[0005] The technical solution adopted in this invention is as follows: The outer shell of the cold source device consists of three parts: a front cover, a shell side, and a rear cover, connected by a flange. The heat exchange section consists of a two-pass honeycomb-like fractal heat exchange core for exchanging heat between hot and cold media. The front cover includes a cold-side inlet and a cold-side outlet, the shell side includes a hot-side inlet, a hot-side outlet, and a condensate outlet, and the rear cover serves as a mixing chamber. When the honeycomb-like fractal cold source device starts working, the cold-side medium enters from the cold-side inlet of the front cover, passes through the partition plate inside the front cover, enters the fractal flow channel inside the first-pass heat exchange core, flows into the mixing chamber of the rear cover, where it is mixed to achieve a uniform temperature distribution, and then flows into the second-pass heat exchange core, exiting from the cold-side outlet of the front cover. When the cold-side medium flows, the hot-side medium enters from the shell-side hot-side inlet, flowing in the opposite direction to the cold-side medium. It flows through the outer baffle wall of the two-pass honeycomb-like fractal heat exchange core, exchanging heat with the internal cold-side medium, and finally exits from the shell-side hot-side outlet. Condensate generated during the heat exchange process exits from the shell-side condensate outlet. By combining the honeycomb characteristics and fractal flow features found in nature, a highly compact cold source device is designed to improve the cooling efficiency of deep-sea power systems, exhibiting good adaptability and reliability under extreme conditions such as high pressure, low temperature, and limited space in the deep sea.

[0006] To achieve the above objectives, according to one aspect of the present invention, a modular biomimetic fractal compact deep-sea power cold source device is provided, which includes a cold source device shell consisting of a front end cover, a shell side, and a rear end cover, and a heat exchange core for heat exchange consisting of a double-pass honeycomb fractal heat exchange core, a heat exchange core front baffle, a heat exchange core rear baffle, and a baffle plate.

[0007] Furthermore, the dual-pass honeycomb fractal heat exchange core consists of two parts: a first-pass heat exchange core and a second-pass heat exchange core. The two heat exchange cores have identical structures and are distributed vertically within the cold source device for heat exchange in different processes. The basic unit constituting the dual-pass honeycomb fractal heat exchange core is a honeycomb cell, initially shaped as a regular hexagonal prism. The cut surfaces of the hexagonal prism are then cut to form the honeycomb cell cut surfaces. Afterward, the cut structure undergoes internal shelling to form a cavity, resulting in the honeycomb cell shell. After obtaining a single honeycomb cell, it is arrayed horizontally and vertically to form an upper and lower honeycomb fractal heat exchange core plate. To ensure the flow of the cold-side medium within the formed honeycomb fractal heat exchange core plate, elliptical openings are drilled into the six sides of the honeycomb cell shell.

[0008] Furthermore, the dual-pass honeycomb fractal heat exchange core is composed of an upper honeycomb fractal heat exchange core plate and a lower honeycomb fractal heat exchange core plate stacked together. The interlayer region between the upper and lower honeycomb fractal heat exchange core plates is where the hot-side medium flows, while the interior of the core plate is where the cold-side medium flows. To ensure that the hot and cold-side media do not intersect, honeycomb fractal heat exchange core plate hot-side baffles are added to the left and right sides of the core plates of the upper and lower honeycomb fractal heat exchange core plates.

[0009] Furthermore, the front cover is composed of a front cover shell, a cold-side inlet, a cold-side inlet flange, a front cover flange, a baffle plate, a cold-side outlet, and a cold-side outlet flange. The cold-side inlet and outlet are the inlets and outlets for the flow of the cold-side medium, respectively, and are connected to external pipelines via the cold-side inlet flange and cold-side outlet flange. The baffle plate divides the fluid entering the cold source device into two flow channels and supports the front cover shell. The front cover is connected to the shell-side front flange via the front cover flange.

[0010] Furthermore, the shell side is the region through which the hot-side medium flows, including a hot-side inlet, a hot-side outlet, and a condensate outlet. The hot-side inlet is connected to an external pipeline via a hot-side inlet flange, and the hot-side medium flows in from this section. After heat exchange, the condensate flows out from the condensate outlet, which is connected to an external pipeline via a condensate outlet flange. The remaining medium after heat exchange flows out from the hot-side outlet, which is connected to an external pipeline via a hot-side outlet flange. The shell side rear flange is connected to the rear end cover flange.

[0011] Furthermore, the rear end cover consists of a rear end cover flange and a rear end cover shell, used for mixing the cold-side medium after heat exchange in the first-pass heat exchange core, so as to make the heat distribution more uniform. The mixed cold-side medium flows from the rear end cover through the second-pass heat exchange core, and finally flows out from the cold-side outlet after heat exchange.

[0012] Furthermore, the dual-pass honeycomb fractal heat exchange core is equipped with identical front and rear baffles at both ends to separate the media on the cold side and to limit and support the dual-pass honeycomb fractal heat exchange core. Each honeycomb heat exchange core plate in the honeycomb heat exchange core is embedded in the cold-side core plate grooves in the front and rear baffles, forming a core plate stack. The first-pass and second-pass heat exchange cores are limited by limiting strips, and the hot-side baffles prevent the hot-side media from flowing into the interior of the heat exchange core plates.

[0013] Furthermore, the two-way honeycomb-like fractal heat exchange core is equipped with baffles evenly distributed on it, arranged alternately up and down along the flow direction of the cold-side medium. The baffles guide the flow of the hot-side fluid, changing the flow direction and velocity within the shell to prevent excessively high flow velocities from causing poor heat exchange or localized dead zones, thus increasing heat exchange efficiency. In addition, the baffles also support the honeycomb-like heat exchange core plates, preventing deformation due to excessive structural pressure, which could affect the flow of the medium on both the hot and cold sides.

[0014] Furthermore, the elliptical openings of the basic unit of the double-pass honeycomb fractal heat exchange core, the honeycomb cell, can maintain a constant aperture size when arrayed to form the heat exchange core plate, or the size can be increased or decreased along the arrangement direction of the heat exchange core plate. The cutting angles of the six honeycomb cells (top and bottom) are completely identical.

[0015] Furthermore, the internal flow channels of the honeycomb-like fractal heat exchange upper core plate and the honeycomb-like fractal heat exchange lower core plate exhibit fractal flow characteristics. Fluid flows through the elliptical openings of the honeycomb cells, mixes within the cells, and flows out through other elliptical openings into the next stage, ultimately forming a multi-stage fractal flow characteristic. This characteristic increases fluid mixing and enhances the heat exchange effect.

[0016] Furthermore, the honeycomb cell in the lower core plate of the honeycomb fractal heat exchanger is obtained by rotating the honeycomb cell in the upper core plate of the honeycomb fractal heat exchanger by 180°, and the cell directions of the two are opposite.

[0017] Furthermore, the length of the front cover and the rear cover is not less than 5 times the side length of the simulated honeycomb cell, and the thickness of the partition plate of the front cover is not less than 1 times the side length of the simulated honeycomb cell.

[0018] Furthermore, during operation of the cold source device, the cold-side medium enters from the cold-side inlet of the front cover, passes through the partition plate inside the front cover, and enters the fractal flow channel inside the first-pass heat exchange core. It then flows into the rear cover, where it mixes to achieve a uniform temperature distribution. Afterward, it flows into the second-pass heat exchange core, exchanges heat with the hot-side medium, and exits from the cold-side outlet of the front cover. While the cold-side medium flows, the hot-side medium enters from the hot-side inlet of the shell side, flowing in the opposite direction to the cold-side medium. It flows through the outer baffle wall of the double-pass honeycomb fractal heat exchange core, exchanges heat with the internal cold-side medium, and finally exits from the hot-side outlet of the shell side. The condensate generated during the heat exchange process exits from the condensate outlet of the shell side. This process forms a complete heat exchange flow.

[0019] Compared with the prior art, the present invention has the following beneficial effects: When the honeycomb-like fractal cold source device starts working, the cold-side medium enters from the cold-side inlet of the front cover, passes through the partition plate inside the front cover and enters the fractal flow channel inside the first heat exchange core, flows into the mixing chamber of the rear cover, where it is mixed to achieve a uniform temperature distribution, and then flows into the second heat exchange core and exits from the cold-side outlet of the front cover. The hot-side medium enters from the hot-side inlet of the shell side, flows in the opposite direction to the cold-side medium, flows through the outer baffle wall of the double-pass honeycomb-like fractal heat exchange core, exchanges heat with the internal cold-side medium, and finally exits from the hot-side outlet of the shell side. The condensate generated during the heat exchange process exits from the condensate outlet of the shell side. Based on the characteristics of honeycomb and fractal flow in nature, and combined with a quick-release connection mechanism and a multi-layer support structure, a detachable modular biomimetic fractal high-compactness cold source device suitable for deep-sea power applications is designed. Compared with the traditional shell-and-tube structure, this cold source device has the advantages of high compactness and high heat exchange efficiency, which can be used to improve the cooling efficiency of deep-sea power systems. It has good adaptability and reliability under extreme conditions such as high pressure, low temperature and space constraints in the deep sea. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a modular biomimetic fractal compact deep-sea power cooling source device according to the present invention.

[0021] Figure 2 This is a schematic diagram of the honeycomb heat exchange cell structure of a modular biomimetic fractal compact deep-sea power cooling device according to the present invention.

[0022] Figure 3 This is a schematic diagram of the honeycomb-like fractal heat exchange core plate structure of a modular biomimetic fractal compact deep-sea power cold source device according to the present invention.

[0023] Figure 4 This is a schematic diagram of the honeycomb-like fractal heat exchange core structure of a modular biomimetic fractal compact deep-sea power cold source device according to the present invention.

[0024] Figure 5 This is a schematic diagram of the assembly of a honeycomb-like fractal heat exchange core structure for a modular biomimetic fractal compact deep-sea power cooling device according to the present invention.

[0025] Figure 6 This is a schematic diagram of the external casing of a modular biomimetic fractal compact deep-sea power cooling device according to the present invention.

[0026] Figure 7 This is a schematic diagram of the front and rear end cover structure of a modular biomimetic fractal compact deep-sea power cooling source device according to the present invention.

[0027] Figure 8This is a schematic diagram of the outer shell of the cooling core of a modular biomimetic fractal compact deep-sea power cold source device according to the present invention.

[0028] Figure 9 This is a schematic diagram of the hot flow domain baffle structure and deflector of a modular biomimetic fractal compact deep-sea power cold source device according to the present invention.

[0029] Explanation of reference numerals in the attached diagram: 1. Front cover; 1a. Front cover shell; 1b. Cold side inlet; 1c. Cold side inlet flange; 1d. Front cover flange; 1e. Divider plate; 1f. Cold side outlet; 1g. Cold side outlet flange; 2. Shell side; 2a. Shell side front flange; 2b. Hot side outlet; 2c. Hot side outlet flange; 2d. Hot side shell; 2e. Hot side inlet; 2f. Hot side inlet flange; 2g. Shell side rear flange; 2h. Condensate outlet; 2i. Condensate outlet flange; 3. Two-way honeycomb-like fractal heat exchanger core; 3a. Heat exchanger core front baffle; 3a-1. Hot side baffle; 3a-2. Cold side core plate groove 3a-3, Limiting strip; 3b, First-pass heat exchange core; 3b-1, Honeycomb cell; 3b-1a, Honeycomb cell cut surface; 3b-1b, Honeycomb cell shell; 3b-1c, Elliptical opening; 3b-2, Honeycomb fractal heat exchange upper core plate; 3b-3, Honeycomb fractal heat exchange lower core plate; 3b-4, Honeycomb fractal heat exchange core plate hot side baffle; 3b-5, Honeycomb fractal flow characteristics; 3b-6, Honeycomb fractal heat exchange core plate interlayer; 3c, Second-pass heat exchange core; 3d, Heat exchange core rear baffle; 3e, Baffle plate; 4, Rear end cover; 4a, Rear end cover flange; 4b, Rear end cover shell; Detailed Implementation

[0030] The following describes in detail a modular biomimetic fractal compact deep-sea power cooling source device of the present invention with reference to the accompanying drawings and specific embodiments.

[0031] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0032] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0033] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0034] A modular, biomimetic, fractal, compact deep-sea power cooling device, such as Figure 1 As shown, it includes a cold source device shell consisting of a front cover 1, a shell side 2, and a rear cover 4, and a heat exchange core for heat exchange consisting of a double-pass honeycomb fractal heat exchange core 3, a heat exchange core front baffle 3a, a heat exchange core rear baffle 3d, and a baffle plate 3e.

[0035] like Figure 2-4 As shown, the dual-pass honeycomb-like fractal heat exchange core 3 consists of two parts: a first-pass heat exchange core 3b and a second-pass heat exchange core 3c. The two heat exchange cores have identical structures and are distributed vertically within the cold source device for heat exchange in different processes. The basic unit constituting the dual-pass honeycomb-like fractal heat exchange core 3 is a honeycomb-like cell 3b-1, initially shaped as a regular hexagonal prism. The honeycomb-like cell cutting surfaces 3b-1a are formed by cutting the top and bottom surfaces of the hexagonal prism. Afterward, the cut structure undergoes internal shelling to form a cavity, resulting in the honeycomb-like cell shell 3b-1b. After obtaining a single honeycomb-like cell 3b-1, the cell is arrayed horizontally and vertically to form a honeycomb-like fractal heat exchange upper core plate 3b-2 and a honeycomb-like fractal heat exchange lower core plate 3b-3. In order to ensure that the cold side medium can flow inside the formed honeycomb-like fractal heat exchange core plate, holes are punched on the six sides of the honeycomb cell shell 3b-1b to form elliptical openings 3b-1c.

[0036] The dual-pass honeycomb fractal heat exchange core 3 is composed of a honeycomb fractal heat exchange upper core plate 3b-2 and a honeycomb fractal heat exchange lower core plate 3b-3 stacked together. The honeycomb fractal heat exchange core plate interlayer 3b-6 between the honeycomb fractal heat exchange upper core plate 3b-2 and the honeycomb fractal heat exchange lower core plate 3b-3 flows with the hot side medium, while the cold side medium flows inside the core plate. In order to ensure that the hot and cold sides of the medium do not intersect, honeycomb fractal heat exchange core plate hot side baffles 3b-4 are added to the left and right sides of the core plates of the honeycomb fractal heat exchange upper core plate 3b-2 and the honeycomb fractal heat exchange lower core plate 3b-3.

[0037] like Figure 7 As shown, the front cover 1 is composed of a front cover shell 1a, a cold-side inlet 1b, a cold-side inlet flange 1c, a front cover flange 1d, a partition plate 1e, a cold-side outlet 1f, and a cold-side outlet flange 1g. The cold-side inlet 1b and cold-side outlet 1f are the inlet and outlet for the cold-side medium flow, respectively, and are connected to external pipelines via the cold-side inlet flange 1c and cold-side outlet flange 1g. The partition plate 1e divides the fluid entering the cold source device into two flow channels and supports the front cover shell 1a. The front cover 1 is connected to the shell-side front flange 2a via the front cover flange 1d and is connected to the shell-side 2.

[0038] like Figure 8 As shown, shell side 2 is the area through which the hot-side medium flows, including hot-side inlet 2e, hot-side outlet 2b, and condensate outlet 2h. Hot-side inlet 2e is connected to an external pipeline via hot-side inlet flange 2f, and the hot-side medium flows in from this section. After heat exchange, condensate flows out from condensate outlet 2h, which is connected to an external pipeline via condensate outlet flange 2i. The remaining medium after heat exchange flows out from hot-side outlet 2b, which is connected to an external pipeline via hot-side outlet flange 2c. The shell-side rear flange 2g of shell side 2 is connected to the rear end cover flange 4a.

[0039] like Figure 7 As shown, the rear cover 4 consists of a rear cover flange 4a and a rear cover shell 4b, and is used to mix the cold-side medium after heat exchange in the first heat exchange core 3b, so as to make the heat distribution more uniform. The mixed cold-side medium flows from the rear cover 4 through the second heat exchange core 3c, and finally flows out from the cold-side outlet 1f after heat exchange.

[0040] like Figure 8As shown, the two-way honeycomb-like fractal heat exchange core 3 has identical front baffle 3a and rear baffle 3b added to its front and rear ends to separate the media on both sides of the cold side and to limit and support the two-way honeycomb-like fractal heat exchange core 3. Each honeycomb-like heat exchange core plate in the honeycomb-like heat exchange core is embedded in the cold-side core plate groove 3a-2 in the front baffle 3a and rear baffle 3b, forming a core plate stack. The first-way heat exchange core 3b and the second-way heat exchange core 3c are limited by the limiting strip 3a-3, and the hot-side baffle 3a-1 is used to prevent the hot-side medium from flowing into the interior of the heat exchange core plate.

[0041] like Figure 6 As shown, baffles 3e are evenly distributed on the two-way honeycomb fractal heat exchange core 3, and the baffles 3e are arranged alternately up and down along the flow direction of the cold side medium. The baffles 3e are used to guide the flow of the hot side fluid, increase the heat exchange efficiency, and can also change the flow direction and speed of the fluid inside the shell, preventing the problem of poor heat exchange effect or local dead zones caused by excessively high flow velocity.

[0042] The elliptical openings 3b-1c of the basic unit of the double-pass honeycomb fractal heat exchange core 3, the honeycomb cell 3b-1, can maintain a constant aperture size when arrayed to form the heat exchange core plate, or the size can be increased or decreased along the arrangement direction of the heat exchange core plate. The cutting angles of the six honeycomb cell cutting surfaces 3b-1a of the upper and lower parts of the honeycomb cell 3b-1 are exactly the same.

[0043] like Figure 3 As shown, the internal flow channels of the honeycomb fractal heat exchange upper core plate 3b-2 and the honeycomb fractal heat exchange lower core plate 3b-3 exhibit fractal flow characteristics 3b-5. Fluid flows through the elliptical openings 3b-1c of the honeycomb cell 3b-1, mixes within the cell, and flows out through other elliptical openings 3b-1c within the cell to enter the next stage, ultimately forming a multi-stage fractal flow characteristic. This characteristic increases fluid mixing and enhances the heat exchange effect.

[0044] It should be noted that the honeycomb cell 3b-1 in the lower core plate 3b-3 of the honeycomb fractal heat exchanger is obtained by rotating the honeycomb cell 3b-1 in the upper core plate 3b-2 of the honeycomb fractal heat exchanger by 180°, and the cell directions of the two are opposite.

[0045] In addition, the length of the front cover 1 and the rear cover 4 is not less than 5 times the side length of the honeycomb cell 3b-1, and the thickness of the partition plate 1e of the front cover 1 is not less than 1 time the side length of the honeycomb cell 3b-1.

[0046] Finally, the overall heat exchange process of the cold source device can be described as follows: When the cold source device is running, the cold-side medium enters from the cold-side inlet 1b of the front cover 1, passes through the partition plate 1e inside the front cover, enters the fractal flow channel inside the first-pass heat exchange core 3b, flows into the rear cover 4, where it is mixed to make the temperature distribution uniform, and then flows into the second-pass heat exchange core 3c, exchanges heat with the hot-side medium, and then flows out from the cold-side outlet 1f of the front cover 1. When the cold-side medium is flowing, the hot-side medium enters from the hot-side inlet 2e of the shell side 2, flows in the opposite direction to the flow of the cold-side medium, flows through the outer baffle wall of the double-pass honeycomb fractal heat exchange core 3, exchanges heat with the internal cold-side medium, and finally flows out from the hot-side outlet 2b of the shell side 2. The condensate generated during the heat exchange process flows out from the condensate outlet 2h of the shell side 2.

[0047] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the invention in any way. Any changes or modifications made by those skilled in the art based on the above-disclosed technical content should be considered as equivalent and valid embodiments, and all fall within the scope of protection of the present invention.

Claims

1. A modular biomimetic fractal compact deep-sea power cooling source device, comprising a cooling source device shell consisting of a front cover (1), a shell side (2), and a rear cover (4), characterized in that: The device also includes a heat exchange core for heat exchange, consisting of a double-pass honeycomb fractal heat exchange core (3), a heat exchange core front baffle (3a), a heat exchange core rear baffle (3d), and a baffle plate (3e); The dual-pass honeycomb fractal heat exchange core (3) consists of two parts: a first-pass heat exchange core (3b) and a second-pass heat exchange core (3c). The two heat exchange cores have the same structure and are distributed vertically in the cold source device for heat exchange in different processes. The basic unit of the dual-pass honeycomb fractal heat exchange core (3) is a honeycomb cell (3b-1). The honeycomb cell (3b-1) is a hexagonal prism shell structure with triangular pyramids at both ends. Elliptical openings (3b-1c) are provided on the side of the structure. The cutting angles of the six honeycomb cell cutting surfaces (3b-1a) of the honeycomb cell (3b-1) are exactly the same. By arranging the honeycomb cell (3b-1) in horizontal and vertical directions, a honeycomb fractal heat exchange upper core plate (3b-2) and a honeycomb fractal heat exchange lower core plate (3b-3) are formed. The dual-pass honeycomb fractal heat exchange core (3) is formed by stacking an upper honeycomb fractal heat exchange core plate (3b-2) and a lower honeycomb fractal heat exchange core plate (3b-3). The interlayer area between the upper honeycomb fractal heat exchange core plate (3b-2) and the lower honeycomb fractal heat exchange core plate (3b-3) is a honeycomb fractal heat exchange core plate interlayer (3b-6). Furthermore, honeycomb fractal heat exchange core plate hot-side baffles (3b-4) are added on the left and right sides of the core plates of the upper honeycomb fractal heat exchange core plate (3b-2) and the lower honeycomb fractal heat exchange core plate (3b-3). The honeycomb fractal heat exchange core plate interlayer (3b-6) is filled with hot-side medium, while the interior of the upper honeycomb fractal heat exchange core plate (3b-2) and the lower honeycomb fractal heat exchange core plate (3b-3) is filled with cold-side medium.

2. The modular biomimetic fractal compact deep-sea power cooling source device according to claim 1, characterized in that: The front cover (1) includes a front cover shell (1a), a cold side inlet (1b), a partition plate (1e), and a cold side outlet (1f). The partition plate (1e) supports the front cover shell (1a). The cold side inlet (1b) and the cold side outlet (1f) are the inlet and outlet of the cold side medium flow, respectively. The partition plate (1e) divides the fluid entering the cold source device into two channels. The shell side (2) is the area through which the hot side medium flows, including the hot side inlet (2e), the hot side outlet (2b), and the condensate outlet (2h); wherein the hot side medium flows in from the hot side inlet (2e), and after heat exchange, the condensate flows out from the condensate outlet (2h); The rear cover (4) consists of a rear cover flange (4a) and a rear cover shell (4b), which is used to mix the cold side medium after heat exchange through the first heat exchange core (3b). The mixed cold side medium flows from the rear cover (4) through the second heat exchange core (3c) and finally flows out from the cold side outlet (1f) after heat exchange.

3. The modular biomimetic fractal compact deep-sea power cooling source device according to claim 2, characterized in that: The front cover (1) is connected to the shell side (2) front flange (2a) via the front cover flange (1d), thus connecting the front cover (1) and the shell side (2); The shell side (2) rear flange (2g) is connected to the rear end cover flange (4a), thus connecting the shell side (2) to the rear end cover (4).

4. The modular biomimetic fractal compact deep-sea power cooling source device according to claim 3, characterized in that: The double-pass honeycomb fractal heat exchange core (3) has baffles with the same structure at both ends. The baffles include a front baffle (3a) and a rear baffle (3b) of the heat exchange core, which are used to separate the media on both sides of the cold side. The baffles are divided into upper and lower parts by limiting strips (3a-3). Each part is alternately set with a hot side baffle (3a-1) and a cold test core plate groove (3a-2). The heat exchange core plates can be quickly arranged and assembled through the cold test core plate groove (3a-2). The dual-pass honeycomb fractal heat exchange core (3) is embedded in the cold side core plate groove (3a-2) in the front baffle (3a) and rear baffle (3b) of the heat exchange core; the first-pass heat exchange core (3b) and the second-pass heat exchange core (3c) are limited by the limiting strip (3a-3), and the hot side baffle (3a-1) is used to prevent the hot side medium from flowing into the heat exchange core plate.

5. A modular biomimetic fractal compact deep-sea power cooling source device according to claim 4, characterized in that: The double-pass honeycomb fractal heat exchange core (3) has baffles (3e) evenly distributed on it. The baffles (3e) are arranged alternately up and down along the flow direction of the cold side medium to guide the flow of the hot side fluid, change the flow direction and speed of the fluid inside the shell, prevent excessive flow velocity from causing poor heat exchange effect or local dead zones, and increase heat exchange efficiency. In addition, they also serve to support each honeycomb heat exchange core plate to prevent the core plate from deforming due to excessive structural pressure, which would affect the flow of the medium on both the cold and hot sides.

6. A modular biomimetic fractal compact deep-sea power cooling source device according to claim 5, characterized in that: The elliptical openings (3b-1c) of the basic unit of the double-pass honeycomb fractal heat exchange core (3) remain unchanged in size or increase or decrease in size along the arrangement direction of the heat exchange core when the array is formed into a heat exchange core plate.

7. A modular biomimetic fractal compact deep-sea power cooling source device according to claim 6, characterized in that: The internal flow channels of the honeycomb fractal heat exchange upper core plate (3b-2) and the honeycomb fractal heat exchange lower core plate (3b-3) exhibit fractal flow characteristics (3b-5); the fluid flows through the elliptical openings (3b-1c) of the honeycomb cell (3b-1), mixes in the cell, and flows out from another elliptical opening (3b-1c) in the cell to enter the next stage, ultimately forming a multi-stage fractal flow characteristic.

8. A modular biomimetic fractal compact deep-sea power cooling source device according to claim 7, characterized in that: The honeycomb cell (3b-1) in the lower core plate (3b-3) of the honeycomb fractal heat exchanger is obtained by rotating the honeycomb cell (3b-1) in the upper core plate (3b-2) of the honeycomb fractal heat exchanger by 180°, and the cell directions of the two are opposite.

9. A modular biomimetic fractal compact deep-sea power cooling source device according to claim 8, characterized in that: The length of the front cover (1) and the rear cover (4) is not less than 5 times the side length of the honeycomb cell (3b-1), and the thickness of the partition plate (1e) of the front cover (1) is not less than 1 times the side length of the honeycomb cell (3b-1).

10. The working method of the modular biomimetic fractal compact deep-sea power cold source device according to claim 9, characterized in that: S1. The cold side medium enters from the cold side inlet (1b) of the front end cover (1), and after being blocked by the partition plate (1e) inside the front end cover (1), it enters the fractal flow channel inside the heat exchange core (3b). The fluid flows through the elliptical openings (3b-1c) of the honeycomb-like cell (3b-1), mixes within the cell, and flows out through another elliptical opening (3b-1c) in the cell to enter the next level, ultimately forming a multi-level fractal flow characteristic. S2, flows from the first heat exchange core (3b) into the rear end cover (4), and is mixed in the rear end cover (4) to make the temperature distribution uniform; S3. Then, the fluid flows into the interior of the second-pass heat exchange core (3c). The fluid flows through the elliptical opening (3b-1c) of the honeycomb cell (3b-1), mixes in the cell, and flows out from another elliptical opening (3b-1c) in the cell to enter the next stage, ultimately forming a multi-stage fractal flow characteristic. After exchanging heat with the hot side medium, it flows out from the cold side outlet (1f) of the front cover (1); S4. When the cold side medium flows, the hot side medium enters from the hot side inlet (2e) of the shell side (2), flows in the opposite direction to the flow of the cold side medium, flows through the outer baffle wall of the double-pass honeycomb fractal heat exchange core (3), exchanges heat with the internal cold side medium, and finally flows out from the hot side outlet (2b) of the shell side (2). S5. The condensate generated during the heat exchange process flows out from the condensate outlet (2h) of the shell side (2), forming a complete heat exchange process.

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