Carbon fiber heat exchange plate, heat exchanger and preparation process thereof

Abstract

The application provides a carbon fiber heat exchange plate, a heat exchanger and a preparation process thereof, and is applied to the technical field of heat exchangers, wherein the carbon fiber heat exchange plate is made of carbon fiber material and adhesive which are laid layer by layer, the material of the carbon fiber heat exchange plate is composed of 75%-86% of carbon fiber material, 10%-18% of resin curing agent and 4%-7% of fluorocarbon composite powder, the carbon fiber heat exchange plate is made of high content carbon fiber and adds a fluorocarbon composite layer, has the advantages of high strength, high modulus, high temperature resistance and the like, and also has good corrosion resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, and in particular to a carbon fiber heat exchange plate, a heat exchanger and a preparation process thereof. BACKGROUND

[0002] Currently, the existing heat exchangers on the market mainly use two categories of metal materials and non-metal materials (polyimide, polyether ether ketone, resin, composite fiber paper, etc.). Among them, the metal material has good thermal conductivity and strength, but due to the material, especially when using copper or stainless steel and other traditional materials, the weight is relatively large; at the same time, many metals are easily corroded by the environment, which may require more frequent maintenance and earlier replacement, resulting in higher life cycle costs; in addition, the thermal expansion coefficient of metal materials is relatively high, which may cause stress and deformation of the structure in applications with large temperature changes.

[0003] Non-metallic materials have advantages such as corrosion resistance and lightweight, but many non-metallic materials have low thermal conductivity, which may limit their efficiency as heat exchanger materials; these non-metallic materials lack mechanical strength in high-pressure or high-impact application environments and may be difficult to withstand heavy loads; in addition, the wear resistance is limited, and long-term use can easily accelerate wear and damage; at the same time, their wind resistance coefficient is relatively high, which is also a non-negligible disadvantage.

[0004] In view of the shortcomings of the existing heat exchangers, the present application discloses a carbon fiber heat exchange plate, a heat exchanger and a preparation process thereof, which is made of high-content carbon fiber material and has a fluorocarbon composite layer, has the advantages of high strength, high modulus, high temperature resistance, corrosion resistance, etc. and also has good thermal conductivity. SUMMARY

[0005] Therefore, the present application provides a carbon fiber heat exchange plate, a heat exchanger and a preparation process thereof to provide a heat exchanger with high heat exchange efficiency that meets the requirements of harsh environments. The present application provides the following technical solutions:

[0006] In one aspect, the present application provides a carbon fiber heat exchange plate, comprising:

[0007] An initial plate, the initial plate comprising:

[0008] At least two layers of carbon fiber material layers stacked, and

[0009] A resin curing agent layer provided between adjacent carbon fiber material layers;

[0010] A fluorocarbon composite layer, the fluorocarbon composite layer being coated at least on the outermost layer of the initial plate;

[0011] The mass percentage of the carbon fiber material in the carbon fiber heat exchange sheet is 75-86%, the mass percentage of the resin curing agent is 10-18%, and the mass percentage of the fluorocarbon composite powder is 4-7%.

[0012] Further, the resin curing agent layer comprises a base material, a curing agent for initiating cross-linking reaction of the base material, and a fluorocarbon composite powder.

[0013] Further, the base material is an epoxy resin, the curing agent is at least one of an amine, an acid anhydride, and an imidazole, and the fluorocarbon composite layer comprises at least one of polyvinyl fluoride, polyvinylidene fluoride, and polytetrafluoroethylene.

[0014] Further, the fluorocarbon composite layer is further arranged between any adjacent carbon fiber material layer and resin curing agent layer in the initial sheet.

[0015] Further, the carbon fiber heat exchange sheet flow channel is shaped as a parallel flow channel with local bending parts.

[0016] In another aspect, the embodiments of the present application provide a heat exchanger, comprising a frame, a sealing plate, and a heat exchange core, the heat exchange core is obtained by sequentially stacking at least three groups of carbon fiber heat exchange sheets, a heat exchange flow channel is formed between adjacent carbon fiber heat exchange sheets, a support member is arranged on the side surface of the carbon fiber heat exchange sheet, and the carbon fiber heat exchange sheet is any one of the carbon fiber heat exchange sheets described above.

[0017] In another aspect, the embodiments of the present application provide a heat exchanger preparation process, comprising the following steps:

[0018] S1. Preparing a layered carbon fiber material layer by pretreating the carbon fiber material and using a molding process;

[0019] S2. Preparing an initial sheet by layer-by-layer laying the carbon fiber material layer and the resin curing agent layer, and arranging the resin curing agent layer between the carbon fiber material layers;

[0020] S3. Coating a fluorocarbon composite layer on at least the outermost layer of the initial sheet, so that the mass percentage of the carbon fiber material in the carbon fiber heat exchange sheet is 75-86%, the mass percentage of the resin curing agent is 10-18%, and the mass percentage of the fluorocarbon composite powder is 4-7%;

[0021] S4. Assembling a heat exchange core by sequentially stacking at least three groups of carbon fiber heat exchange sheets at the joint thereof and brushing the resin curing agent layer thereon, and arranging a support member on the side surface of the heat exchange core;

[0022] S5. Assembling a frame and a sealing plate after curing and molding the heat exchange core to obtain the heat exchanger.

[0023] In another aspect, the embodiment of the present application provides a heat exchanger preparation process, comprising the following steps:

[0024] S1. Pre-treating carbon fiber material and preparing a layered carbon fiber material layer by using a forming process;

[0025] S2. Coating the surface of the carbon fiber material layer with fluorocarbon composite powder and then laying the fluorocarbon composite powder and a resin curing agent layer by layer to obtain the initial plate;

[0026] S3. Coating the outermost layer of the initial plate with a fluorocarbon composite layer, and the mass percentage of carbon fiber material in the carbon fiber heat exchange plate is 75% to 86%, the mass percentage of the resin curing agent is 10% to 18%, and the mass percentage of the fluorocarbon composite powder is 4% to 7%;

[0027] S4. Stacking the carbon fiber heat exchange plates in at least three groups to obtain a heat exchange core body, and the side surface of the heat exchange core body is provided with a support member;

[0028] S5. Assembling a frame and a sealing plate after curing and forming the heat exchange core body to obtain the heat exchanger.

[0029] Further, the carbon fiber material layer in S1 is locally bent by a mold design flow channel modeling during the curing and forming stage, and the bending form is a triangle, a semicircle or an ellipse.

[0030] Further, the fluorocarbon composite powder is added to the resin curing agent layer in S2.

[0031] Compared with the prior art, the above at least one technical scheme adopted by the embodiment of the present application can achieve at least the following beneficial effects:

[0032] 1. The carbon fiber heat exchange plate of the present application adds a fluorocarbon composite layer, which is used to improve the high viscosity coefficient, the blocking or corrosion and decomposition effect of the heat exchange plate formed by the corrosion heat exchange medium, and the surface of the fluorocarbon composite layer has low surface energy, which gives the surface of the heat exchanger excellent hydrophobic and oleophobic properties and self-cleaning ability, and the anti-adhesion property helps to reduce the deposition of pollutants and maintain high-efficiency heat exchange.

[0033] 2. The carbon fiber heat exchange plate of the present application coats a fluorocarbon composite layer on the carbon fiber material layer and then stacks the fluorocarbon composite layer and the resin curing agent layer, which can further enhance the corrosion resistance and chemical resistance of the composite material, protect the carbon fiber material and resin in the inner layer from chemical medium erosion, and prevent the influence of environmental factors.

[0034] 3. The carbon fiber heat exchange plate of the present invention adds fluorocarbon composite powder to the resin curing agent layer. The synergy between the two can enhance the service life of the composite material in corrosive environments, enhance the mechanical properties of the composite material, and significantly improve the thermal stability and heat resistance of the composite material.

[0035] 4. The carbon fiber heat exchange plate of the present invention has a carbon fiber material content ranging from 75% to 86%. The carbon fiber material has extremely high stiffness. Under the same weight conditions, the plate with high fiber content can provide better structural support and stability. It exhibits good fatigue life in long-term stress applications. It has very good dimensional stability and maintains its performance unchanged in a variety of harsh environments. The high fiber content improves the thermal conductivity of the plate, making it suitable for heat exchanger scenarios that require effective heat dissipation. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the first embodiment of the carbon fiber heat exchange plate of the present invention;

[0038] Figure 2 This is a schematic diagram of the second embodiment of the carbon fiber heat exchange plate of the present invention;

[0039] Figure 3 This is a schematic diagram of the third embodiment of the carbon fiber heat exchange plate of the present invention;

[0040] Figure 4 This is a process diagram illustrating the manufacturing process of the heat exchanger according to the first embodiment of the present invention;

[0041] Figure 5 This is a process diagram illustrating the manufacturing process of the heat exchanger according to the second embodiment of the present invention.

[0042] The diagram shows: 1. Carbon fiber material layer, 2. Resin curing agent layer, 3. Fluorocarbon composite layer. Detailed Implementation

[0043] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Following, the embodiments of the present application will be described in details by specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art according to the description. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The present application can also be implemented or applied by other different specific embodiments, and the details in the description can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0045] In the description herein, "high modulus" generally refers to the stiffness of a material or its ability to resist deformation. In materials science, the elastic modulus (also known as Young's modulus) is a measure of the stiffness of a material. If a material has a high elastic modulus, we usually call it "high modulus", which means it needs a larger force to produce the same deformation.

[0046] In the description herein, fluorocarbon composite layer generally refers to a composite material containing fluorine and carbon compounds, such as fluoropolymers such as polytetrafluoroethylene (PTFE), and these materials may be physically or chemically compounded with other compounds or fillers (such as metal powder, glass fiber, carbon fiber, etc.). Due to the excellent chemical stability and low friction coefficient of fluorine-containing high molecular polymers, these composite layers are widely used in coatings, sealing materials and potential friction reduction applications.

[0047] As shown in Figure 1 The first embodiment of the carbon fiber heat exchange plate sheet of the present application provides a carbon fiber heat exchange plate sheet, which comprises an initial plate sheet, the initial plate sheet comprises: at least two layers of carbon fiber material layers stacked, and a resin curing agent layer arranged between adjacent carbon fiber material layers; a fluorocarbon composite layer, the fluorocarbon composite layer is at least coated on the outermost layer of the initial plate sheet; wherein in the carbon fiber heat exchange plate sheet, the mass fraction of the carbon fiber material is 75% to 86%, the mass fraction of the resin curing agent is 10% to 18%, and the mass fraction of the fluorocarbon composite powder is 4% to 7%.

[0048] The carbon fiber material layer is a layered structure prepared from high modulus carbon fibers, mainly serving the function of reinforcing the strength and rigidity of the material. The carbon fibers have excellent thermal conductivity, thus playing a key role in heat conduction in the heat exchange plate and being the main path for heat transfer in the heat exchange plate. The resin curing agent layer is used to fix the carbon fiber material layer together and fill the gaps between the fibers. It is usually composed of thermosetting plastics such as epoxy resin. The resin maintains the shape and position of the carbon fiber material after curing, providing structural integrity. The fluorocarbon composite layer has excellent chemical stability and corrosion resistance, which can protect the carbon fibers and resin curing agent from external environmental erosion, prolonging the service life of the heat exchange plate. In addition, the fluorocarbon coating also has a low friction coefficient and good non-stickiness, which helps to reduce the flow resistance of the fluid flowing through the heat exchange surface, thereby improving the heat exchange efficiency.

[0049] In summary, compared with common metal or non-metal heat exchange plates, the carbon fiber material layer in the present embodiment provides a heat conduction path and enhances the mechanical properties of the material, the resin curing agent layer maintains the shape of the material, and the surface fluorocarbon coating protects the internal materials and improves the heat exchange conditions. The three work together to enable the carbon fiber heat exchange plate to efficiently exchange heat.

[0050] It should be understood that the material used in the carbon fiber heat exchange plate is adjusted within the proportioning range according to factors such as the thickness of the different plate materials, curing time, environmental temperature, curing process, etc., to ensure product quality. Specifically, when the plate material thickness is thick, the resin content usually needs to be increased to ensure sufficient impregnation and curing, while thinner plates can appropriately reduce the resin content to reduce weight; when the curing time is longer or in a high temperature environment, the curing agent content may need to be reduced to avoid over-curing, while in a shorter time or low temperature environment, the curing agent and accelerator need to be appropriately increased to speed up the curing rate; when the curing process uses hot pressing process, the content of thermoplastic resin may need to be increased, while normal temperature curing may need to increase the content of normal temperature curing agent; adding other additives such as additives and toughening agents in the plate requires corresponding adjustment of the resin content. Reasonable plate material composition helps to improve plate strength and reduce plate preparation difficulty.

[0051] The first embodiment of the present application is an initial plate composed of a carbon fiber material layer and a resin curing agent layer laid layer by layer, and a fluorocarbon composite layer coated on the surface of the initial plate, i.e., the initial plate is assembled first, and then the surface is coated. The specific preparation process is as follows:

[0052] S1. Pretreat the carbon fiber material and prepare a layered carbon fiber material layer using a molding process;

[0053] S2. Uniformly brush a layer of resin curing agent mixture on the surface of the carbon fiber material layer that needs to be spliced;

[0054] S3. Stack the multi-layer coated carbon fiber material layers together and cure to form an initial plate;

[0055] S4. Apply a fluorocarbon composite layer to the outer layer of the initial plate and cure appropriately;

[0056] S5. Perform necessary finishing, cutting and other subsequent processing to obtain the carbon fiber heat exchange plate.

[0057] In some embodiments, the fluorocarbon composite layer includes at least one of polyvinyl fluoride, polyvinylidene fluoride and polytetrafluoroethylene. In addition to the first embodiment, the present application also provides a second embodiment of the heat exchange plate, in which the fluorocarbon composite layer is also provided between any adjacent carbon fiber material layer and resin curing agent layer of the initial plate, and the fluorocarbon composite layer is coated on the carbon fiber material layer before being stacked with the resin curing agent layer. It should be understood that in the actual production process of the heat exchange plate, the fluorocarbon composite powder can be coated on all or only part of the carbon fiber material layer and the resin curing agent layer, depending on the actual corrosion resistance requirements. This embodiment can further enhance the corrosion resistance and chemical resistance of the composite material, protect the carbon fiber material and resin in the inner layer from chemical media erosion, and protect the heat exchanger from environmental factors, while ensuring the corrosion resistance and anti-adhesion of the surface in contact with the fluid medium.

[0058] As Figure 2 the second embodiment of the carbon fiber heat exchange plate of the present application is shown. Compared with the heat exchange plate without adding a fluorocarbon composite layer or only adding a fluorocarbon composite layer on the surface, the corrosion resistance of this embodiment is better, and the protection of the heat exchanger is better. The viscosity coefficient is high, the corrosion of the heat exchange medium is strong, and the blocking or corrosion decomposition effect of the heat exchanger flow channel is reduced.

[0059] The specific preparation process of the second embodiment of the carbon fiber heat exchange plate is as follows:

[0060] S1. Pretreat the carbon fiber material and prepare a layered carbon fiber material layer using a molding process;

[0061] S2. Uniformly coat a fluorocarbon composite coating on the surface of the carbon fiber material layer;

[0062] S3. Properly cure the coated carbon fiber material layer to firmly adhere the fluorocarbon composite layer;

[0063] S4. Uniformly apply a layer of resin curing agent mixture on the surface of the fluorocarbon composite layer that needs to be spliced;

[0064] S5. Stack the multi-layer coated carbon fiber material layers together and cure to form an initial plate;

[0065] S6. Perform necessary finishing, cutting and other subsequent processing to obtain the carbon fiber heat exchange plate.

[0066] Through the process, the prepared carbon fiber heat exchange plate has good mechanical properties, corrosion resistance and heat exchange efficiency.

[0067] In some embodiments, the resin curing agent layer comprises a matrix material and a curing agent for initiating cross-linking reaction of the matrix material. The matrix material is a thermosetting resin such as epoxy resin, phenolic resin, etc., which has good thermal stability and mechanical properties and is suitable for high-temperature heat exchangers.

[0068] Specifically, the matrix material in the resin curing agent layer is preferably epoxy resin, and the curing agent is at least one of amine, acid anhydride and imidazole suitable for epoxy resin. The amine curing agent is, for example, aliphatic amine (such as diethylene triamine DETA, hexamethylene diamine HMDA, etc.), aromatic amine (such as m-phenylenediamine MDEA), etc. These amine compounds react with epoxy resin to form a three-dimensional network structure and achieve curing. The acid anhydride curing agent is, for example, methyl tetrahydrophthalic anhydride (MHHPA) and hexahydrophthalic anhydride (HHPA), which react with epoxy resin under heating. In some cases where low-temperature or room-temperature curing is required, imidazole compounds are also used as curing agents.

[0069] As shown in FIG. 1, the resin curing agent layer is added to the carbon fiber heat exchange plate, which can improve the mechanical properties, thermal stability, flame retardance and chemical resistance of the carbon fiber heat exchange plate. Figure 3 As shown in FIG. 2, the third embodiment of the carbon fiber heat exchange plate of the present application additionally adds fluorocarbon composite powder to the resin curing agent layer. The addition of fluorocarbon composite powder to the resin curing agent layer has some synergistic effects, and compared with the heat exchange plate without adding fluorocarbon composite powder to the resin, the specific performance is as follows:

[0070] The fluorocarbon composite powder has certain compatibility and affinity with the resin matrix, can form good bonding at the interface, and thus enhances the mechanical properties of the composite material. Secondly, it can improve the rheological behavior of the resin system and improve its processing process, which is beneficial to the molding and curing process of the product. In addition, the thermal stability of the resin curing agent itself is limited, while the fluorocarbon material has excellent high-temperature resistance, and the synergistic effect of the two can significantly improve the thermal stability and heat resistance of the composite material. At the same time, the conventional flame retardance of the resin is poor, while the fluorocarbon composite material itself has self-extinguishing characteristics, and the synergistic effect of the two can significantly enhance the flame retardance and fire resistance of the composite material. Finally, the resin is prone to aging and degradation in some chemical environments, while the fluorocarbon material has excellent chemical inertness, so the synergistic effect of the two can enhance the service life of the composite material in corrosive environments.

[0071] It should be noted that in order to achieve the best synergistic effect, the amount of fluorocarbon powder, dispersibility and interfacial compatibility with the resin matrix need to be optimized. It should be understood that the additional addition of fluorocarbon composite powder in the resin curing agent layer in this embodiment can be implemented simultaneously or separately with the first or second embodiments, and the structure of the carbon fiber material layer shown in the figure is only for display and is not limited to the material structure or process.

[0072] The mass ratio of the carbon fiber material in the present application is 75% to 90%, and the high modulus carbon fiber material has very high stiffness. Compared with the low mass ratio of the carbon fiber material, the high fiber content sheet can provide better structural support and stability under the same weight conditions. It has good fatigue life in long-term stress applications. At the same time, it has very low thermal expansion coefficient, and its dimensional stability is very good under temperature change. Moreover, the high corrosion resistance of the carbon fiber heat exchange sheet keeps the performance unchanged in various harsh environments. In general, the high content of carbon fiber material layer improves the thermal conductivity of the plate, which is more suitable for heat exchanger scenarios that require effective heat dissipation.

[0073] For this high content carbon fiber material layer, carbon fiber can be made by prepreg molding method, pultrusion molding method or fabric winding method. The heat exchange sheet made by the prepreg molding method has high precision and low void, and the material distribution is accurately controlled in advance, and the accuracy and consistency of the finished product are outstanding. The material layer prepared by the pultrusion molding method has the characteristics of fast speed, high efficiency and relatively low cost, and can realize continuous production and automatic operation, so it is widely used in mass production of carbon fiber composite material profiles. The carbon fiber product made by the fabric winding method has high mechanical properties and structural integrity, which can fully utilize the strength and stiffness advantages of carbon fiber.

[0074] As shown in Figure 4 and Figure 5 respectively, the process flowchart of the first and second embodiments of the heat exchange sheet of the present application is shown. In the carbon fiber heat exchange sheet, the mass ratio of the carbon fiber material is 75% to 86%, the mass ratio of the resin curing agent is 10% to 18%, and the mass ratio of the fluorocarbon composite powder is 4% to 7%. After brushing the resin curing agent layer at the joint of the carbon fiber heat exchange sheet, the sheet and sheet are stacked and pressed according to the required direction and level to form a heat exchange flow channel of fluid medium, assembled into a heat exchange core, and a support member is provided on the side of the heat exchange core. After the heat exchange core is cured and formed, the frame and the sealing plate are assembled into a heat exchanger.

[0075] In some embodiments, the carbon fiber heat exchange plate is designed by mold in the curing process, and a special flow channel is formed after the plate is cured. The flow channel is shaped in the form of triangle, rhombus, semicircle, ellipse, and circle, etc. After surface treatment, the thickness is 0.1mm-0.4mm. When other conditions are the same, the smaller the thickness of the material, the more heat is transferred from one side to the other side, and the higher the heat transfer efficiency. In practical application, according to Fourier's Law, the heat flow is inversely proportional to the thickness of the material, that is, the heat flow is equal to the thermal conductivity multiplied by the ratio of the temperature gradient to the cross-sectional area of the material, and then divided by the thickness of the material.

[0076] In some embodiments, the carbon fiber heat exchange plate is stacked in a specific direction, such as the same direction, the opposite direction, 90 degrees or 270 degrees rotation, to adapt to different heat exchange requirements of the heat exchanger.

[0077] Specifically, an embodiment of a heat exchanger manufacturing process has the following steps:

[0078] 1. Use high modulus carbon fiber to make carbon fiber material layer, cut according to the required size specification; prepare the solution of the resin curing agent layer, that is, mix a certain amount of matrix material and curing agent according to a specific ratio; dry lay the cut carbon fiber material layer on the mold, brush the resin curing agent layer on the surface, and lay each layer to the required number of layers to obtain the initial plate; use a feature sealing bag or a sealed container to make the inside of the initial plate in a vacuum state for better material shaping and fitting; finally, send the plate after vacuum treatment into a hot press tank for heating and curing;

[0079] 2. After 24-72 hours of curing and forming, remove the sealing bag or container, cut the edge burrs, and process the surface concave-convex defects. Spray fluorocarbon powder on the surface, and then bake and shape at high temperature; stack the processed heat exchange plate in a specific direction (same direction, opposite direction, 90 degrees or 270 degrees rotation), and brush a layer of curing adhesive for each layer to prevent cold and hot medium mixing due to poor sealing between flow channels;

[0080] 3. After the assembly of the stacked heat exchange core is completed, use a fixture to press it tightly, put it into a sealed container, vacuum the inside, and send it into a hot press tank for curing again; after the curing of the heat exchange core is completed, take it out and process it again, assemble the heat exchange core frame, and make it into a complete heat exchange core or heat exchanger;

[0081] 4. Test the heat exchanger: seal the ends of the A and B flow channels, fill with gas, and maintain pressure for 2-4 hours (the pressure of the pressure-maintaining gas should not be less than 5000 pa) to test the sealing effect of the heat exchange core A and B flow channels; the heat exchange core or heat exchanger that passes the air tightness test enters the next step of heat exchange efficiency test and wind resistance test, completes all tests, and produces a heat exchange core or heat exchanger that meets the design standard.

[0082] In the specification, the same or similar parts among the various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the part of the foregoing embodiments.

[0083] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A carbon fiber heat exchange plate, characterized in that, include: An initial sheet, the initial sheet comprising: at least two stacked layers of carbon fiber material, and A resin curing agent layer is disposed between adjacent carbon fiber material layers; A fluorocarbon composite layer, wherein the fluorocarbon composite layer is coated at least on the outermost layer of the initial plate; In the carbon fiber heat exchange plates, the mass percentage of carbon fiber material is 75% to 86%, the mass percentage of resin curing agent is 10% to 18%, and the mass percentage of fluorocarbon composite powder is 4% to 7%.

2. The carbon fiber heat exchange plate according to claim 1, characterized in that, The resin curing agent layer comprises a matrix material, a curing agent that initiates a crosslinking reaction of the matrix material, and a fluorocarbon composite powder.

3. The carbon fiber heat exchange plate according to claim 2, characterized in that, The matrix material is epoxy resin; the curing agent is at least one of amines, acid anhydrides, and imidazoles; the fluorocarbon composite layer includes at least one of polyvinylidene fluoride, polyvinylidene fluoride, and polytetrafluoroethylene.

4. The carbon fiber heat exchange plate according to claim 1, characterized in that, The fluorocarbon composite layer is also disposed between any adjacent carbon fiber material layers and resin curing agent layers in the initial plate.

5. The carbon fiber heat exchange plate according to claim 1, characterized in that, The carbon fiber heat exchange plate has a parallel flow channel design with some bends.

6. A heat exchanger, comprising a frame, a sealing plate, and a heat exchange core, wherein the heat exchange core is formed by sequentially stacking at least three sets of carbon fiber heat exchange plates, heat exchange channels are formed between adjacent carbon fiber heat exchange plates, and supporting members are provided on the sides of the carbon fiber heat exchange plates, characterized in that... The carbon fiber heat exchange plate is the carbon fiber heat exchange plate according to any one of claims 1-5.

7. A heat exchanger manufacturing process, characterized in that, Includes the following steps: S1. Pre-treat carbon fiber material and prepare layered carbon fiber material layers using a molding process; S2. Lay out the carbon fiber material layer and the resin curing agent layer layer by layer to obtain an initial plate, wherein the resin curing agent layer is disposed between the carbon fiber material layers; S3. The initial plate is coated with at least the outermost layer of a fluorocarbon composite layer, cured, and the initial plate is trimmed and cut to obtain a carbon fiber heat exchange plate. In the carbon fiber heat exchange plate, the mass percentage of carbon fiber material is 75% to 86%, the mass percentage of resin curing agent is 10% to 18%, and the mass percentage of fluorocarbon composite powder is 4% to 7%. S4. At least three sets of carbon fiber heat exchange plates are coated with the resin curing agent layer at their joints and then stacked and assembled into a heat exchange core. The heat exchange core is provided with a support member on its side. S5. After the heat exchange core is solidified and molded, the frame and sealing plate are assembled to form the heat exchanger.

8. A heat exchanger manufacturing process, characterized in that, Includes the following steps: S1. Pre-treat carbon fiber material and prepare layered carbon fiber material layers using a molding process; S2. After coating the surface of the carbon fiber material layer with fluorocarbon composite powder, it is laid layer by layer with resin curing agent to obtain an initial plate; S3. The outermost layer of the initial plate is coated with a fluorocarbon composite layer, cured, and the initial plate is trimmed and cut to obtain a carbon fiber heat exchange plate. In the carbon fiber heat exchange plate, the mass percentage of carbon fiber material is 75% to 86%, the mass percentage of resin curing agent is 10% to 18%, and the mass percentage of fluorocarbon composite powder is 4% to 7%. S4. At least three sets of carbon fiber heat exchange plates are coated with the resin curing agent layer at their joints and then stacked and assembled into a heat exchange core. The heat exchange core is provided with a support member on its side. S5. After the heat exchange core is solidified and molded, the frame and sealing plate are assembled to form the heat exchanger.

9. The heat exchanger manufacturing process according to any one of claims 7 or 8, characterized in that, The carbon fiber material layer described in S1 is partially bent during the curing and molding stage by designing the flow channel shape using a mold. The bending form is triangular, semi-circular, or elliptical.

10. The heat exchanger manufacturing process according to any one of claims 7 or 8, characterized in that, Fluorocarbon composite powder is added to the resin curing agent layer in S2.

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