Liquid cooling plate, liquid cooling system for photovoltaic heat dissipation, and manufacturing method of liquid cooling plate

Abstract

The liquid cooling plate for photovoltaic heat dissipation is a square thin plate as a whole, and a concave spiral flow channel is formed on the plate surface. The flow channel first extends linearly upward from the lower right corner of the liquid cooling plate to the middle of the right side, then spirals counterclockwise from the outside to the inside to the center of the liquid cooling plate, then spirals clockwise from the inside to the outside to the middle of the left side of the liquid cooling plate, and then extends linearly upward to the upper left corner of the liquid cooling plate; the cross-section of the flow channel is semicircular as a whole, and a cover plate capable of closing the flow channel is provided above the flow channel to form a cooling pipeline for the coolant to flow; a plastic heat insulation layer is provided on the outer wall side of the flow channel through an injection molding process. Through the reasonable design of the structure of the liquid cooling plate, the present invention can not only ensure the use reliability of the liquid cooling plate product, but also improve its uniform heat dissipation effect and prevent condensation, so that the liquid cooling plate and the liquid cooling system of the present invention have broad market prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling for photovoltaic heat dissipation, and specifically relates to a liquid cooling plate, a liquid cooling system and a method for manufacturing a liquid cooling plate for photovoltaic heat dissipation. Background Art

[0002] The energy source of photovoltaic power generation is the sun. Using the photovoltaic effect of photovoltaic panels to convert solar energy into electrical energy, it is a clean energy source that has attracted more and more attention and has great potential in the future.

[0003] At present, the photoelectric conversion efficiency of photovoltaic panels is still very low, only about 20%. Most of the solar energy is converted into heat energy, resulting in a very obvious temperature rise of the photovoltaic panels. However, the photoelectric conversion efficiency of photovoltaic panels is greatly affected by the working temperature. It is found that for every one-degree increase in the working temperature, the photoelectric conversion efficiency will decrease by about 0.3%. The decrease amplitude accounts for a large proportion in the already low conversion efficiency. In addition, the continuous high-temperature working environment will accelerate the failure of electronic components in the photovoltaic panels, resulting in a shortened service life of the photovoltaic panels. Therefore, people are constantly looking for more efficient, reliable and low-cost photovoltaic heat dissipation technologies.

[0004] Compared with the traditional air-cooling method, the liquid-cooling method has higher heat dissipation efficiency. Among them, the method of using a liquid cooling plate for heat exchange for heat dissipation is the most widely used. However, when the temperature of the outer wall of the coolant pipeline in the liquid cooling plate is too low, lower than the dew point temperature of the air in the environment, the ambient air will condense dew on the outer wall of the coolant pipeline, which may cause negative impacts such as short circuits and fires of the photovoltaic panels in severe cases.

[0005] The patent document with the publication number CN 118463682 A discloses a liquid cooling plate structure, which still needs to be improved in terms of structural reliability and heat dissipation uniformity. The patent document with the publication number CN 218069980 U also discloses a liquid cooling plate structure, which still has a large room for improvement in terms of heat dissipation effect and anti-condensation effect. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a liquid cooling plate, a liquid cooling system and a method for manufacturing a liquid cooling plate for photovoltaic heat dissipation, which are more reliable in structure, more convenient to manufacture, more uniform and efficient in heat dissipation effect, and more effective and thorough in anti-condensation effect.

[0007] To solve the above technical problems, the first technical solution adopted by the present invention is:

[0008] The liquid cooling plate for photovoltaic heat dissipation is a square thin plate as a whole, and a concave spiral flow channel is formed on the plate surface. The flow channel first extends linearly upward from the lower right corner of the liquid cooling plate to the middle of the right side, then spirals counterclockwise from the outside to the inside to the center of the liquid cooling plate, then spirals clockwise from the inside to the outside to the middle of the left side of the liquid cooling plate, and then extends linearly upward to the upper left corner of the liquid cooling plate;

[0009] The cross-section of the flow channel is semicircular as a whole, and a cover plate capable of closing the flow channel is provided above the flow channel to form a cooling pipeline for the coolant to flow through; the pipe diameter of the entire cooling pipeline gradually decreases from the outside to the inside and in the counterclockwise direction in the first half; and gradually increases from the inside to the outside and in the clockwise direction in the second half;

[0010] At the ports of the flow channel located at the lower right corner and the upper left corner of the liquid cooling plate, liquid pipe quick connectors capable of being quickly connected to external liquid pipes are provided;

[0011] A plastic heat insulation layer formed by an injection molding process is provided on the outer wall side of the flow channel.

[0012] Furthermore, a cover plate groove for placing the cover plate is provided on the liquid cooling plate located above the flow channel. The bottom of the side of the cover plate groove is connected to the top of the side of the flow channel through a first-level step. The width of the bottom of the cover plate is slightly larger than the pipe diameter of the flow channel. The width of the first-level step is equivalent to the width of the bottom of the cover plate, so that a transition fit is formed between the bottom of the cover plate and the first-level step; the width of the cover plate groove is slightly larger than the width of the cover plate, and both sides of the cover plate and the cover plate groove are set to be inclined from bottom to top and inward. The cover plate is welded to the liquid cooling plate in the cover plate groove through a brazing process. At this time, the brazing filler metal in the brazing process can enter the gap between the side surface of the cover plate and the side surface of the cover plate groove and also becomes inclined from bottom to top and inward.

[0013] Furthermore, the cover plate is provided to be spliced in sections. The side surfaces of one section of the cover plate after another are welded to the liquid cooling plate in the cover plate groove through a brazing process; a downwardly protruding hook is provided on the front end surface of the segmented cover plate, and a matching concave hook groove is provided on the rear end surface. The widths of the hook and the hook groove are set to be 1 / 2 to 2 / 3 of the width of the end surface of the segmented cover plate and are centered; the rear end surface of the front cover plate abuts against the front end surface of the rear cover plate through the connection structure of the hook entering the hook groove. Chamfers are provided at the top of the front and rear end surfaces of the cover plate, and the front and rear chamfers form a triangular space for the brazing filler metal to enter. Welding is formed at the front and rear abutting end surfaces of the segmented cover plate through a brazing process.

[0014] Furthermore, a non-metallic base silicone grease heat conduction coating capable of conducting the heat of the photovoltaic panel to the entire upper surface of the liquid cooling plate is coated on the upper surface of the liquid cooling plate.

[0015] Further, there are riblets formed by stamping on the outer wall of the flow channel. The cross-section of the riblets is in the shape of a swallowtail, so that an inverted buckling structure is formed between the plastic heat insulation layer and the riblets. At the position corresponding to the riblets in the flow channel, there are concave-shaped turbulence grooves formed by stamping, which can play a role in disturbing the coolant in the flow channel.

[0016] Further, there are concave-shaped drying grooves on the outer surface of the heat insulation layer. Drying packets are placed in the drying grooves, and a drying groove cover is tightly clamped at the mouth of the drying groove.

[0017] Further, an anti-condensation water coating is applied on the outer surface of the heat insulation layer, and heat preservation cotton is further provided.

[0018] Further, a boss is provided at the central part of the liquid cooling plate, and a fan that can assist the liquid cooling plate in dissipating heat is provided on the boss.

[0019] The second technical solution adopted by the present invention is:

[0020] A liquid cooling system for photovoltaic heat dissipation includes several of the aforementioned liquid cooling plates arranged neatly, a central refrigerator, a liquid supply main pipe, a booster pump, liquid supply branch pipes, a liquid return main pipe, liquid return branch pipes, and a transfer pump. The output port of the central refrigerator is connected to the liquid supply main pipe, a booster pump is provided on the pipeline of the liquid supply main pipe, the liquid supply main pipe is connected to the flow channel inlets of each liquid cooling plate through the liquid supply branch pipes, the liquid return main pipe is connected to the flow channel outlets of each liquid cooling plate through the liquid return branch pipes, the liquid return main pipe is connected to the input port of the central refrigerator, and a transfer pump is provided on the pipeline of the liquid return main pipe.

[0021] The third technical solution adopted by the present invention is:

[0022] The manufacturing method of the aforementioned liquid cooling plate includes the following steps:

[0023] S1: Stamping and cutting a square aluminum thin plate;

[0024] S2: Stamping a spiral variable-diameter flow channel and a cover plate groove on the aluminum thin plate, and simultaneously stamping a first-level step at the top side of the flow channel, as well as riblets and turbulence grooves on the flow channel;

[0025] S3: Stamping and cutting a spiral cover plate and cutting it into segmented cover plates;

[0026] S4: Stamping hooks and hook grooves on the front and rear end faces of the segmented cover plates respectively, and cutting and forming chamfered bevels at the tops of the front and rear end faces;

[0027] S5: Tapping and clamping the segmented cover plates on the first-level step one by one;

[0028] S6: Welding the segmented cover plates with the liquid cooling plate in the cover plate groove through a brazing process;

[0029] S7: Place the liquid cooling plate in the injection mold, and through the injection molding process, inject and mold a plastic heat insulation layer on the outer wall side of the runner;

[0030] S8: Grind and level the upper surface of the liquid cooling plate, especially the places with outward protruding welding brazing;

[0031] S9: Coat a non-metallic base silicone grease heat conduction coating on the upper surface of the liquid cooling plate;

[0032] S10: Coat a layer of anti-condensation water coating on the outer surface of the heat insulation layer;

[0033] S11: Place a drying packet in the drying tank, and clamp the drying tank cover at the mouth of the drying tank;

[0034] S12: Glue and fix the heat preservation cotton on the outside of the heat insulation layer.

[0035] The liquid cooling plate for photovoltaic heat dissipation provided by the first technical solution of the present invention has the characteristics of more reliable structure, more uniform and efficient heat dissipation effect, and at the same time has the effect of preventing condensation water.

[0036] The liquid cooling system for photovoltaic heat dissipation provided by the second technical solution of the present invention can dissipate heat from large photovoltaic panels and has the characteristic of wide application range.

[0037] The manufacturing method of the liquid cooling plate for photovoltaic heat dissipation provided by the third technical solution of the present invention has the characteristics of convenient manufacturing process and also has the prospect of realizing automated manufacturing.

[0038] Through the reasonable design of the structure, manufacturing method and application mode of the liquid cooling plate, the present invention can not only ensure the use reliability of the liquid cooling plate product, but also improve its uniform heat dissipation effect, prevent condensation, and adopt a manufacturing method that is both efficient and low-cost, so that the liquid cooling plate and liquid cooling system of the present invention have a broad market prospect. Description of the Drawings

[0039] Figure 1 is the top view structure schematic diagram of the liquid cooling plate of the present invention;

[0040] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0041] Figure 3 is Figure 2 the enlarged view of part C in

[0042] Figure 4 is Figure 3 the structural decomposition diagram of

[0043] Figure 5 is Figure 1 the rotating sectional view taken along line B-B in

[0044] Figure 6 It is a schematic structural diagram of the liquid cooling system of the present invention.

[0045] Each label in the figure is respectively:

[0046] 10 - liquid cooling plate, 11 - flow channel, 12 - cover plate groove, 13 - first - level step, 14 - rib, 15 - turbulence groove, 16 - boss, 17 - fan;

[0047] 20 - cover plate, 21 - bevel angle, 22 - triangular space, 23 - hook, 24 - hook groove;

[0048] 30 - cooling pipeline;

[0049] 40 - liquid pipe quick connector;

[0050] 50 - brazing solder;

[0051] 60 - heat - conducting coating;

[0052] 70 - heat - insulating layer, 71 - drying groove, 72 - drying package, 73 - drying groove cover;

[0053] 80 - anti - condensation water coating;

[0054] 90 - heat - insulating cotton;

[0055] 101 - central refrigerator, 102 - main liquid supply pipe, 103 - booster pump, 104 - liquid supply branch pipe, 105 - main liquid return pipe, 106 - liquid return branch pipe, 107 - delivery pump. Detailed implementation mode

[0056] To describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the implementation modes and with reference to the drawings.

[0057] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0058] It should also be noted that in the description of the present invention, the terms "first", "second", etc. are used to distinguish similar features, rather than to describe a specific order or sequence. It should be understood that such features can be interchanged under appropriate circumstances.

[0059] Refer to Figure 1, the liquid cooling plate 10 for photovoltaic heat dissipation of the present invention is a square thin plate as a whole, and a concave spiral flow channel 11 is formed on the plate surface. The flow channel 11 first extends linearly upward from the lower right corner of the liquid cooling plate 10 to the middle on the right side, then spirals counterclockwise from the outside to the inside to the center of the liquid cooling plate 10, then spirals clockwise from the inside to the outside to the middle on the left side of the liquid cooling plate 10, and then extends linearly upward to the upper left corner of the liquid cooling plate 10. It can be understood that the liquid cooling plate 10 can be rectangular or square.

[0060] See Figure 2 、 3 , the cross-section of the flow channel 11 is semicircular as a whole, and a cover plate 20 capable of closing the flow channel 11 is provided above the flow channel 11 to form a cooling pipeline 30 for the coolant to flow through. See Figure 1 , liquid pipe quick connectors 40 are provided at the ports of the flow channel 11 located at the lower right corner and the upper left corner of the liquid cooling plate 10, which can be quickly connected to external liquid pipes.

[0061] Setting the cooling pipeline 30 in a spiral shape helps the coolant to flow smoothly; the entire cooling pipeline 30 first spirals counterclockwise and then clockwise, and the counterclockwise pipeline and the clockwise pipeline are alternately arranged at intervals, which is beneficial to uniform heat dissipation; moreover, the liquid pipe quick connectors 40 at both ends of the cooling pipeline 30 can be blindly connected to the external inlet and outlet liquid pipes, with the characteristics of strong randomness in the pipe connection operation and wide adaptability in the use of the liquid cooling plate 10.

[0062] See Figure 1 、 2 , the pipe diameter of the entire cooling pipeline 30 gradually decreases from the outside to the inside in the counterclockwise direction in the first half; and gradually increases from the inside to the outside in the clockwise direction in the second half. Therefore, the entire cooling pipeline 30 forms a variable-diameter pipeline with a Venturi effect, which helps the coolant to smoothly enter the clockwise spiral from the counterclockwise spiral in the cooling pipeline 30.

[0063] See Figure 3 、 4 , to facilitate the positioning and covering of the cover plate 20 on the flow channel 11, a cover plate groove 12 for placing the cover plate 20 is provided on the liquid cooling plate 10 above the flow channel 11. The bottom side of the side of the cover plate groove 12 is connected to the top side of the side of the flow channel 11 through a first-level step 13. The width of the bottom of the cover plate 20 is slightly larger than the pipe diameter of the flow channel 11, and the width of the first-level step 13 is equivalent to the width of the bottom of the cover plate 20, so that the bottom of the cover plate 20 and the first-level step 13 form a transition fit. With such a setting, it is very easy to position and snap the cover plate 20 on the flow channel 11 and form a relatively tight snap connection.

[0064] To ensure that the cover plate 20 is firmly combined with the flow channel 11 to form a closed cooling pipeline 30, the cover plate 20 is welded to the liquid cooling plate 10 in the cover plate groove 12 through a brazing process. To further ensure firm combination, the width of the cover plate groove 12 is slightly larger than the width of the cover plate 20, so that the brazing filler metal 50 in the brazing process can enter the gap between the side surface of the cover plate 20 and the side surface of the cover plate groove 12, thereby increasing the welding strength of the cover plate 20 in the cover plate groove 12. To further ensure firm combination, both side surfaces of the cover plate 20 are set to be inclined inward from bottom to top, and both side surfaces of the cover plate groove 12 are also set to be inclined inward from bottom to top. At this time, the brazing filler metal 50 entering the gap is also inclined inward from bottom to top, so as to increase the de-welding strength of the cover plate 20.

[0065] See Figure 5 , comprehensively considering the processes of manufacturing, storing, transporting, damaging, installing, replacing, and maintaining the cover plate 20, the cover plate 20 can be set to be composed of segmented splicing. The side surfaces of one section after another of the cover plate 20 are welded to the liquid cooling plate 10 in the cover plate groove 12 through a brazing process. The rear end surface of the front section of the cover plate 20 abuts against the front end surface of the rear section of the cover plate 20 and is welded through a brazing process. To facilitate and strengthen the brazing of the end surfaces of the cover plate 20, chamfers 21 are provided at the tops of the front and rear end surfaces of the cover plate 20, and the triangular space 22 formed by the front and rear chamfers 21 allows the brazing filler metal 50 to enter. To quickly position and splice the segmented cover plate 20, a downwardly protruding hook 23 is provided on the front end surface of the segmented cover plate 20, and a matching concave hook groove 24 is provided on the rear end surface. Considering the stamping processing cost of manufacturing the segmented cover plate 20, the hook 23 and the hook groove 24 are set to be the same width as the end surface of the segmented cover plate 20. However, to facilitate the positioning and abutting of the segmented cover plate 20 through the hook 23, the widths of the hook 23 and the hook groove 24 can be set to 1 / 2 to 2 / 3 of the width of the end surface of the segmented cover plate 20, and the positions are centered.

[0066] See Figure 2 , 3 See FIGS. 4 and 5. A non-metallic base silicone grease heat-conducting coating 60 is coated on the upper surface of the liquid cooling plate 10. This heat-conducting coating 60 can conduct the heat of the photovoltaic panel to the entire upper surface of the liquid cooling plate 10, which is beneficial for heat dissipation through heat exchange with the coolant in the liquid cooling plate 10 and is also beneficial for the overall natural heat dissipation of the liquid cooling plate 10.

[0067] See Figure 2 , 3, 4. To prevent dew from condensing on the outer wall of the flow channel 11, a heat insulation layer 70 is provided on the outer wall side of the flow channel 11. The heat insulation layer 70 can be formed into a plastic heat insulation layer 70 through an injection molding process. To improve the bonding strength between the heat insulation layer 70 and the flow channel 11, a rib 14 is provided on the outer wall of the flow channel 11. The cross-section of the rib 14 is in the shape of a swallowtail, so that the plastic heat insulation layer 70 and the rib 14 form an inverted buckle structure, thereby achieving the purpose of improving the bonding strength. At the position corresponding to the rib 14 in the flow channel 11, a concave turbulator groove 15 is provided. The turbulator groove 15 can play a role in disturbing the coolant in the flow channel 11 to promote full heat exchange of the coolant. The rib 14 and the turbulator groove 15 on the flow channel 11 can be formed together through a stamping process.

[0068] To further prevent condensation, a concave drying groove 71 is provided on the outer surface of the heat insulation layer 70. A drying packet 72 is placed in the drying groove 71, and a drying groove cover 73 is tightly clamped at the mouth of the drying groove 71.

[0069] To further prevent condensation, a layer of anti-condensation water coating 80 is coated on the outer surface of the heat insulation layer 70.

[0070] To further prevent condensation, a heat preservation cotton 90 is provided on the outside of the heat insulation layer 70, which can not only further insulate heat but also absorb the condensed water that may appear. The heat preservation cotton 90 can be fixed on the outside of the heat insulation layer 70 by gluing or screws.

[0071] See Figure 1 , 2 , a boss 16 is provided at the central part of the liquid cooling plate 10, and a fan 17 is provided on the boss 16. The fan 17 can assist the liquid cooling plate 10 in dissipating heat.

[0072] The liquid cooling plate 10 for photovoltaic heat dissipation of the present invention can be used alone. Through connectors (not shown in the figure) such as quick clamps or screws, the liquid cooling plate 10 is attached to the photovoltaic panel for heat dissipation; it can also be used as the smallest unit, arranged repeatedly and used in combination, that is, the liquid cooling system for photovoltaic heat dissipation of the present invention.

[0073] See Figure 6 , the liquid cooling system for photovoltaic heat dissipation of the present invention includes several neatly arranged liquid cooling plates 10 as described above, a central cooler 101, a liquid supply main pipe 102, a booster pump 103, a liquid supply branch pipe 104, a liquid return main pipe 105, a liquid return branch pipe 106, and a delivery pump 107. The output port of the central cooler 101 is connected to the liquid supply main pipe 102. A booster pump 103 is provided on the pipeline of the liquid supply main pipe 102. The liquid supply main pipe 102 is connected to the inlet of the flow channel 11 of each liquid cooling plate 10 through a liquid supply branch pipe 104. The liquid return main pipe 105 is connected to the outlet of the flow channel 11 of each liquid cooling plate 10 through a liquid return branch pipe 106. The liquid return main pipe 105 is connected to the input port of the central cooler 101. A delivery pump 107 is provided on the pipeline of the liquid return main pipe 105.

[0074] The liquid cooling system for photovoltaic heat dissipation of the present invention can dissipate heat from large photovoltaic panels. By standardizing the size specifications of the gradient liquid cooling plate 10, liquid cooling plates 10 of common specifications can be pre-stored in advance, so as to achieve the purpose of quickly responding to demands; moreover, the multi-gradient standardized size specifications can match most usage requirements and have the characteristic of a wide application range.

[0075] The manufacturing method of the aforementioned liquid cooling plate 10 of the present invention includes the following steps:

[0076] S1: Stamping and cutting a square aluminum thin plate;

[0077] S2: Stamping and forming a spiral variable flow channel 11 and a cover plate groove 12 on the aluminum thin plate, and simultaneously stamping and forming a first-level step 13 at the top side of the flow channel 11, as well as a rib 14 and a turbulence groove 15 on the flow channel 11;

[0078] S3: Stamping and cutting a spiral cover plate 20 and cutting it into segmented cover plates 20;

[0079] S4: Stamping and forming a hook 23 and a hook groove 24 on the front and rear end faces of the segmented cover plate 20 respectively, and trimming and forming an inclined chamfer 21 at the top of the front and rear end faces;

[0080] S5: One by one, knocking and clamping the segmented cover plate 20 on the first-level step 13;

[0081] S6: Forming a weld between the segmented cover plate 20 and the liquid cooling plate 10 in the cover plate groove 12 through a brazing process;

[0082] S7: Placing the liquid cooling plate 10 in an injection mold, and through an injection process, injecting and forming a plastic heat insulation layer 70 on the outer wall side of the flow channel 11;

[0083] S8: Grinding and leveling the upper surface of the liquid cooling plate 10, especially the places with outwardly protruding welding brazes;

[0084] S9: Coating a non-metallic base silicone grease heat-conducting coating 60 on the upper surface of the liquid cooling plate 10;

[0085] S10: Coating an anti-condensation water coating 80 on the outer surface of the heat insulation layer 70;

[0086] S11: Placing a drying packet 72 in the drying tank 71 and clamping the drying tank cover 73 at the mouth of the drying tank 73;

[0087] S12: Gluing and fixing a heat preservation cotton 90 on the outer side of the heat insulation layer 70.

[0088] Qualified liquid cooling plates 10 can be manufactured through conventional processes such as stamping, brazing, injection molding, and coating. Moreover, these processes have the prospect of full automation application, which can further improve manufacturing efficiency and ensure manufacturing quality. Considering both manufacturing cost, quality assurance, and heat dissipation effect, the above process steps are selected to complete the manufacturing, making the manufacturing of the liquid cooling plate 10 highly cost-effective.

[0089] As described above, it is only a preferred embodiment of the present invention to help understand the creative idea of the present invention, and it does not impose any limitation on the technical scope of the present invention. Any non-creative equivalent changes made to the above embodiments based on the technical essence of the present invention still fall within the technical scope of the present invention.

Claims

1. The liquid cooling plate used for photovoltaic heat dissipation is a square thin plate as a whole, and its characteristics are: A concave spiral flow channel is formed on the plate surface, which first extends straight upward from the lower right corner of the liquid cooling plate to the middle of the right side, then spirals counterclockwise from the outside to the inside to the center of the liquid cooling plate, then spirals clockwise from the inside to the outside to the middle of the left side of the liquid cooling plate, and then extends straight upward to the upper left corner of the liquid cooling plate; The cross section of the flow channel is semicircular as a whole, and a cover plate capable of closing the flow channel is provided above the flow channel to form a cooling channel for the flow of coolant; the diameter of the entire cooling channel gradually decreases from the outside to the inside in a counterclockwise direction in the first half; and gradually increases from the inside to the outside in a clockwise direction in the second half; Liquid pipe quick connectors that can be quickly connected to external liquid pipes are provided at the ports located at the lower right corner and the upper left corner of the liquid cooling plate; A stamped convex strip is provided on the outer wall of the flow channel, and the cross section of the convex strip is dovetail-shaped; a plastic heat insulation layer formed by an injection molding process is also provided on the outer wall of the flow channel, and the plastic heat insulation layer and the convex strip form an inverted structure; a stamped concave spoiler groove is provided at a position corresponding to the convex strip in the flow channel, which can spoil the coolant in the flow channel; A concave drying groove is arranged on the outer surface of the plastic heat insulation layer, a drying bag is placed in the drying groove, and a drying groove cover is tightly clamped at the mouth of the drying groove; a layer of anti-condensation water coating is coated on the outer surface of the plastic heat insulation layer, and then heat preservation cotton is arranged.

2. The liquid cooling plate for photovoltaic heat dissipation according to claim 1 is characterized in that: A cover plate groove for placing a cover plate is provided at the liquid cooling plate located above the flow channel, the side bottom of the cover plate groove is connected with the side top of the flow channel through a step, the width of the bottom of the cover plate is slightly larger than the pipe diameter of the flow channel, the width of the first step is equivalent to the width of the bottom of the cover plate, so that the bottom of the cover plate and the first step form a transition fit; the width of the cover plate groove is slightly larger than the width of the cover plate, and the cover plate and the side surfaces of the cover plate groove are both set to be inclined from bottom to top and inward, the cover plate is welded to the liquid cooling plate in the cover plate groove by a brazing process, at this time the brazing material in the brazing process can enter the gap between the side surface of the cover plate and the side surface of the cover plate groove, and also become inclined from bottom to top and inward.

3. The liquid cooling plate for photovoltaic heat dissipation according to claim 2 is characterized in that: The cover plate is configured to be spliced ​​in sections, and the side surfaces of the cover plates one section after another are welded to the liquid cooling plate in the cover plate groove by a brazing process; a downwardly protruding hook is provided on the front end face of the segmented cover plate, and a matching concave hook groove is provided on the rear end face, and the width of the hook and the hook groove is set to 1 / 2 to 2 / 3 of the width of the end face of the segmented cover plate, and the position is centered; the rear end face of the front section cover plate and the front end face of the rear section cover plate are abutted against each other through a connecting structure in which the hook enters the hook groove, and chamfers are formed at the top of the front and rear end faces of the cover plate, and the front and rear chamfers form a triangular space for the brazing material to enter, and welding is formed at the front and rear abutting end faces of the segmented cover plate by a brazing process.

4. The liquid cooling plate for photovoltaic heat dissipation according to claim 3 is characterized in that: A non-metallic silicone grease thermal conductive coating is coated on the upper surface of the liquid cooling plate, which can conduct the heat of the photovoltaic panel to the entire upper surface of the liquid cooling plate.

5. The liquid cooling plate for photovoltaic heat dissipation according to claim 4 is characterized in that: A boss is arranged at the center of the liquid cooling plate, and a fan which can assist the liquid cooling plate in dissipating heat is arranged on the boss.

6. A liquid cooling system for photovoltaic heat dissipation, comprising a central refrigerator, a liquid supply main pipe, a booster pump, a liquid supply branch pipe, a liquid return main pipe, a liquid return branch pipe and a delivery pump, characterized in that: It also includes a plurality of neatly arranged liquid cooling plates as described in any one of claims 1 to 5; the output port of the central refrigerator is connected to the liquid supply main pipe, a booster pump is provided on the pipeline of the liquid supply main pipe, the liquid supply main pipe and the flow channel inlet of each liquid cooling plate are connected through a liquid supply branch pipe, the liquid return main pipe and the flow channel outlet of each liquid cooling plate are connected through a liquid return branch pipe, the liquid return main pipe is connected to the input port of the central refrigerator, and a delivery pump is provided on the pipeline of the liquid return main pipe.

7. The method for manufacturing the liquid cooling plate according to claim 4, characterized in that: The steps include: S1: Punching and cutting square aluminum sheet; S2: A spiral variable diameter flow channel and a cover plate groove are stamped on an aluminum sheet, and a step is stamped on the top of the flow channel side, as well as convex strips and spoiler grooves on the flow channel; S3: Punching and cutting the spiral cover plate, and cutting it into segmented cover plates; S4: punching hooks and hook grooves on the front and rear end surfaces of the segmented cover plate, respectively, and cutting chamfers on the tops of the front and rear end surfaces; S5: Knock the segmented cover plates one by one onto the first step; S6: welding the segmented cover plate to the liquid cooling plate in the cover plate groove by a brazing process; S7: placing the liquid cooling plate in an injection mold, and injection molding a plastic heat insulation layer on the outer wall side of the flow channel through an injection molding process; S8: Grind and smooth the upper surface of the liquid cooling plate, especially where there are external protruding solder joints; S9: Apply a layer of non-metallic silicone grease thermal conductive coating on the upper surface of the liquid cooling plate; S10: Apply an anti-condensation coating on the outer surface of the thermal insulation layer; S11: placing a drying bag in the drying tank, and snapping the drying tank cover into the drying tank opening; S12: Glue and fix the thermal insulation cotton on the outside of the thermal insulation layer.

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