Solar panel cooling device with straight pipe core body and preparation method of solar panel cooling device

Abstract

The invention provides a solar panel cooling device with a straight pipe core body and a preparation method thereof, and belongs to the technical field of solar power generation, the solar panel cooling device comprises an integrated pump body, an upper liquid collecting pipe, the straight pipe core body, a lower liquid collecting pipe, a heat exchange assembly and a solar panel, the integrated pump body is connected with the upper liquid collecting pipe, the straight pipe core body is obliquely arranged, and the lower liquid collecting pipe is connected with the heat exchange assembly. The upper end of the straight pipe core body is connected with the upper liquid collecting pipe, the lower end of the straight pipe core body is connected with the lower liquid collecting pipe, the lower liquid collecting pipe is connected with the right end of the heat exchange assembly, the left end of the heat exchange assembly is connected with the integrated pump body, and the solar panel is arranged on one side of the straight pipe core body. The straight pipe core body is arranged to shorten the flow channel, the solar panel is cooled through the straight pipe core body, the heat exchange path is shortened by optimizing the flow channel structure, the heat exchange efficiency is improved, the pressure drop is reduced, and the overall temperature difference of the solar panel is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of solar power generation, and in particular to a solar panel cooling device with a straight tube core and a preparation method thereof. Background Art

[0002] Solar generators generate electricity by directly shining sunlight on solar panels and charge batteries. They can power products such as DC energy-saving lamps, tape recorders, televisions, DVDs, satellite TV receivers, etc. Photovoltaic modules generate heat while generating electricity. If the heat is not dissipated in time, the operating temperature of the photovoltaic panel surface will be too high, which will have a negative impact on the conversion efficiency of the system. For every 1°C increase in the temperature of the solar photovoltaic panel, the output power decreases by 0.4%. When the temperature exceeds the limit temperature, it will also accelerate the aging rate of silicon cells. Therefore, the cooling research of photovoltaic panels is of great significance.

[0003] For example, the solution proposed in publication number CN219577002U (a photovoltaic panel cooling system) can utilize the water flow from an external tap water pipe to flow through a cooling water tank, so that the water can fully contact the back of the waterproof solar photovoltaic panel, so that the heat on the solar photovoltaic panel can be timely exchanged away by the water flow, thereby achieving effective cooling of the solar photovoltaic panel and improving the power generation efficiency of the solar photovoltaic panel; however, the applicant found that the whole system needs to be coordinated with an external tap water pipe during use, which is very inconvenient, and the temperature of the water will gradually increase when the spiral water pipe is swirling. The temperature of the water reaching the end will be significantly higher than the temperature of the first liquid inlet, resulting in a poor cooling effect and a high overall temperature difference of the solar panel.

[0004] The solution proposed in application number 202310552541.4 (a RV solar panel cooling device) also has the problem of a single flow channel. The temperature of the water reaching the end of the heat exchange part is significantly higher than the temperature of the first liquid inlet, resulting in a poor cooling effect and a high overall temperature difference of the solar panel.

[0005] The solution proposed in application number 202322502320.4 (a solar generator refrigeration mechanism) also uses a single flow channel, but with an additional cooling module added to the flow channel. While this design can reduce the temperature of the cooling medium, it seriously leads to an excessively long flow channel at the heat exchange end, excessive pressure drop across the heat exchange core, and low heat exchange efficiency.

[0006] The above-mentioned existing technologies have problems such as long heat exchange channel, large pressure drop of heat exchange core, high temperature difference of solar panel and poor heat dissipation efficiency. Therefore, it is necessary to provide a solar power generation panel with high heat exchange efficiency and cooling device. Summary of the Invention

[0007] The present invention aims to provide a solar panel cooling device with a straight tube core and its preparation method, addressing the technical problem of poor heat dissipation efficiency of existing solar panels. By designing parallel flow paths for the heat-collecting straight tubes, the present invention shortens the heat exchange path, reduces pressure drop, improves heat exchange efficiency, and minimizes the overall temperature difference of the solar panel. Combined with an integrated pump, this device achieves efficient integrated solar-electric-heat utilization.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A solar panel cooling device with a straight tube core comprises an integrated pump body, an upper liquid collecting pipe, a straight tube core, a lower liquid collecting pipe, a heat exchange component and a solar panel, wherein the integrated pump body is connected to the upper liquid collecting pipe, the straight tube core is arranged at an angle, the upper end of the straight tube core is connected to the upper liquid collecting pipe, the lower end of the straight tube core is connected to the lower liquid collecting pipe, the lower liquid collecting pipe is connected to the right end of the heat exchange component, the left end of the heat exchange component is connected to the integrated pump body, and the solar panel is arranged on one side of the straight tube core.

[0010] Furthermore, a first liquid outlet and an exhaust hole are respectively provided at the upper end of the integrated pump body, the first liquid outlet is connected to a water outlet pipe, and the water outlet pipe is connected to an upper liquid collecting pipe.

[0011] Furthermore, a first liquid inlet and a water drain hole are respectively provided at the lower end of the integrated pump body, the first liquid inlet is connected to a water inlet pipe, and the water inlet pipe is connected to the heat exchange component.

[0012] Furthermore, the straight tube core includes a plurality of heat-collecting straight tubes, the plurality of heat-collecting straight tubes are arranged at equal intervals, and a plurality of heat-collecting straight tubes are arranged at an angle.

[0013] Furthermore, a second liquid inlet is provided on one side of the upper collecting pipe, and the second liquid inlet is connected to the water outlet pipe. A plurality of second liquid outlets are provided on the other side of the upper collecting pipe, and the second liquid outlets are connected to the heat collecting straight pipe through a first connecting head, and the first connecting head is inclined toward one side of the solar panel.

[0014] Furthermore, a plurality of third liquid inlets are provided on one side of the lower collecting pipe, and the third liquid inlets are connected to the heat collecting straight pipe through a second connecting head, and the second connecting head is inclined toward one side of the solar panel. A third liquid outlet is provided on the other side of the lower collecting pipe, and the third liquid outlet is connected to a connecting pipe, and the connecting pipe is connected to the heat exchange component.

[0015] Furthermore, one side of the solar panel is arranged in contact with the heat collecting straight pipe, the solar panel is arranged on a solar panel frame, and the solar panel frame is respectively connected to the upper collecting pipe and the lower collecting pipe.

[0016] Furthermore, the heat exchange component includes a heat exchange core and a cooling fan, and a liquid inlet chamber and a liquid outlet chamber are respectively provided at both ends of the heat exchange core. A fourth liquid inlet is provided on the liquid inlet chamber, and the fourth liquid inlet is connected to the connecting pipe. A fourth liquid outlet is provided on the liquid outlet chamber, and the fourth liquid outlet is connected to the water inlet pipe. The cooling fan is arranged on the front side of the heat exchange core.

[0017] Furthermore, the heat exchange core includes a plurality of heat dissipation tubes and a plurality of fins, the heat dissipation tubes and the fins are arranged at intervals, and both ends of the heat dissipation tubes are respectively connected to the liquid inlet chamber and the liquid outlet chamber.

[0018] A method for preparing a solar panel cooling device with a straight tube core comprises the following steps:

[0019] Step 1: Preparation of straight tube core: First, select copper or aluminum alloy tubes and cut them into straight tubes of equal length. Then, use a roller forming process to press the tubes into a flat shape to increase the contact area with the collector. Then, use high-frequency welding equipment to weld multiple straight tubes in parallel to the upper and lower liquid collecting pipes to form parallel flow channels.

[0020] Step 2: Microchannel processing: etching microchannels on the aluminum substrate, and then bonding the collector and the straight tube core by brazing or thermal conductive adhesive to ensure heat conduction efficiency;

[0021] Step 3: Assemble the whole machine. First, tilt the straight tube core; then laminate the solar panel to the surface of the collecting pipe through EVA film, and fix the solar panel frame to the collecting pipe respectively; then connect the integrated pump body to the straight tube core, and set the temperature sensor and flow controller; then assemble the heat exchange component, and connect the liquid inlet chamber and liquid outlet chamber of the heat exchange component to the integrated pump body and the lower collecting pipe respectively; finally, use an aluminum alloy shell to wrap the straight tube core and the collector, and ensure the sealing by rolling and shaping, to obtain a solar panel cooling device with a straight tube core.

[0022] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0023] 1. The present invention shortens the flow channel by providing a straight tube core, and cools the solar panel through the straight tube core. By optimizing the flow channel structure, the heat exchange path is shortened, the heat exchange efficiency is improved, the pressure drop is reduced, and the overall temperature difference of the solar panel is reduced.

[0024] 2. The present invention improves waste heat recovery efficiency by forming a heat collector with a straight tube core, an upper collecting pipe, and a lower collecting pipe. By combining a microchannel heat collector with an integrated pump body, efficient heat exchange and low energy consumption operation are achieved. The integrated pump body simplifies the system structure and facilitates installation and maintenance.

[0025] 3. The preparation method of the present invention includes straight tube forming, high-frequency welding and whole machine assembly processes, and is suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the solar panel cooling device of the present invention;

[0027] Figure 2 is a top view of the solar panel cooling device of the present invention;

[0028] Figure 3 is a side view of the solar panel cooling device of the present invention;

[0029] Figure 4 Schematic diagram of the connection between the straight tube core and the upper and lower liquid collecting pipes of the present invention;

[0030] Figure 5 It is a top view of the connection between the straight tube core body of the present invention and the upper and lower liquid collecting pipes;

[0031] Figure 6 It is a side view of the connection between the straight tube core body of the present invention and the upper and lower liquid collecting pipes;

[0032] Figure 7 Schematic diagram of the connection between the solar panel and the straight tube core of the present invention;

[0033] Figure 8 is a schematic diagram of a heat exchange assembly of the present invention;

[0034] Figure 9 is a schematic diagram of the roller forming section of the present invention;

[0035] Figure 10 is a schematic diagram of a high-frequency welding station assembly of the present invention;

[0036] Figure 11 It is a schematic diagram of the rolling shaping section of the present invention.

[0037] In the accompanying drawings, 1-integrated pump body, 11-first liquid outlet, 12-exhaust hole, 13-first liquid inlet, 14-drain hole, 2-upper liquid collecting pipe, 21-second liquid inlet, 22-second liquid outlet, 23-first connector, 3-straight tube core, 31-heat collecting straight pipe, 4-lower liquid collecting pipe, 41-third liquid inlet, 42-second connector, 43-third liquid outlet, 5-heat exchange component, 51-cooling fan, 52-liquid inlet chamber, 53-liquid outlet chamber, 54-fourth liquid inlet, 55-fourth liquid outlet, 56-heat dissipation pipe, 57-fin, 6-solar panel, 61-solar panel frame, 7-water outlet pipe, 8-water inlet pipe, 9-connecting pipe. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and by way of preferred embodiments. However, it should be noted that many of the details listed in this specification are merely provided to help the reader gain a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be practiced even without these specific details.

[0039] like Figure 1-3 As shown, a solar panel cooling device with a straight tube core includes an integrated pump body 1, an upper manifold 2, a straight tube core 3, a lower manifold 4, a heat exchange assembly 5, and a solar panel 6. The integrated pump body 1 is connected to the upper manifold 2. The straight tube core 3 is tilted, with the upper end of the straight tube core 3 connected to the upper manifold 2 and the lower end of the straight tube core 3 connected to the lower manifold 4. The lower manifold 4 is connected to the right end of the heat exchange assembly 5, and the left end of the heat exchange assembly 5 is connected to the integrated pump body 1. The solar panel 6 (photovoltaic layer) is arranged on one side of the straight tube core 3. The integrated pump body includes a water tank and a micro-circulation pump to drive the cooling medium to circulate in the straight tube core. The heat exchange assembly is connected to the outlet of the straight tube core for heat exchange between the working medium and an external medium (such as air or water). The solar panel uses PERC, HJT, or perovskite cells for photoelectric conversion, converting sunlight into electrical energy. The heat exchange component is a device used to transfer heat between two or more fluids. It achieves heat exchange through efficient heat conduction and convection, and the fluids themselves do not directly mix. The coolant is pumped out through the integrated pump body 1, introduced into the straight tube core 3 through the upper collecting pipe 2, and after the solar panel is cooled by the straight tube core 3, the hot coolant is introduced into the heat exchange component 5 through the lower collecting pipe 4. The heat exchange component 5 cools the hot coolant, and the cooled coolant is then introduced into the integrated pump body 1. This can not only improve the heat dissipation efficiency, but also realize the circulation of the coolant and reduce the cost of use. The present invention shortens the flow channel by providing a straight tube core, and cools the solar panel through the straight tube core. By optimizing the flow channel structure, the heat exchange path is shortened, the heat exchange efficiency is improved, the pressure drop is reduced, and the overall temperature difference of the solar panel is reduced.

[0040] like Figure 1 As shown, the upper end of the integrated pump body 1 is provided with a first liquid outlet 11 and an exhaust hole 12 (liquid filling hole). The exhaust hole 12 is used for vacuuming or filling coolant. The first liquid outlet 11 is connected to a water outlet pipe 7, which is connected to the upper collecting pipe 2. The lower end of the integrated pump body 1 is provided with a first liquid inlet 13 and a drain hole 14. The drain hole 14 is normally plugged with a square head bolt and is used to drain the water accumulated in the pump body after shutdown to prevent rusting of internal pump parts and freezing of the pump body in winter. The first liquid inlet 13 is connected to a water inlet pipe 8, which is connected to the heat exchange component 5. An integrated pump body refers to a system that combines a water tank and a pump, and is used to circulate the working medium within the entire heat exchange system.

[0041] like Figure 4-6 As shown, the straight tube core 3 includes a number of heat-collecting straight tubes 31, and the several heat-collecting straight tubes 31 are arranged at equal intervals, and a number of the heat-collecting straight tubes 31 are arranged at an angle. The straight tube core is composed of a number of heat-collecting straight tubes in parallel, and the material is copper or aluminum alloy. The cooling medium (water, antifreeze or air) flows through the tube, and the heat-collecting straight tubes are evenly spaced. A second liquid inlet 21 is provided on one side of the upper collecting pipe 2, and the second liquid inlet 21 is connected to the outlet pipe 7. A number of second liquid outlets 22 are provided on the other side of the upper collecting pipe 2, and the second liquid outlet 22 is connected to the heat-collecting straight tube 31 through a first connector 23, and the first connector 23 is arranged at an angle toward one side of the solar panel 6. The upper collecting pipe 2 is configured as a tube body with sealed ends. The lower manifold 4 is provided with a plurality of third liquid inlets 41 on one side. These third liquid inlets 41 are connected to the heat collection straight tubes 31 via second connectors 42. The second connectors 42 are tilted toward one side of the solar panel 6. A third liquid outlet 43 is provided on the other side of the lower manifold 4. These third liquid outlets 43 are connected to a connecting pipe 9, which is connected to the heat exchange assembly 5. The first connectors 23 and the second connectors 42 are tilted toward one side of the solar panel 6 so that the heat collection straight tubes 31 and one side of the manifold are aligned on the same plane. This allows the connected heat collection straight tubes 31 to contact the solar panel 6, thereby effectively cooling the solar panel 6. The lower manifold 4 is configured as a tube with sealed ends. The upper and lower manifolds can utilize microchannel collectors, which are integrated with the straight tube core and secured by welding or bonding. The microchannel collector absorbs waste heat from the photovoltaic layer and transfers it to the straight tube core, where it is cooled by the coolant within the straight tube core. The coolant pumped out by the integrated pump body 1 is introduced into a plurality of heat collecting straight pipes 31 through the upper collecting pipe 2 to cool the solar panel 6 , and the hot coolant enters the heat exchange component 5 through the lower collecting pipe 4 .

[0042] like Figure 7 As shown, one side of the solar panel 6 is arranged in contact with the heat collecting straight pipe 31, and the solar panel 6 is arranged on the solar panel frame 61. The solar panel 6 is fixed by the solar panel frame 61, and the solar panel frame 61 is respectively connected to the upper collecting pipe 2 and the lower collecting pipe 4, so that the solar panel 6 and the heat collecting straight pipe 31 are always in a contact setting state, ensuring that the heat collecting straight pipe dissipates heat for the solar panel.

[0043] like Figure 8As shown, the heat exchange assembly 5 includes a heat exchange core and a cooling fan 51. A liquid inlet chamber 52 and a liquid outlet chamber 53 are provided at each end of the heat exchange core. The liquid inlet chamber 52 is provided with a fourth liquid inlet 54, which is connected to the connecting pipe 9. The liquid outlet chamber 53 is provided with a fourth liquid outlet 55, which is connected to the water inlet pipe 8. The cooling fan 51 is located on the front side of the heat exchange core. The heat exchange core includes a plurality of heat pipes 56 and a plurality of fins 57. The heat pipes 56 and fins 57 are arranged in an alternating pattern. The ends of the heat pipes 56 are connected to the liquid inlet chamber 52 and the liquid outlet chamber 53, respectively. The hot coolant coming out of the lower collecting pipe 4 enters the liquid inlet chamber 52 through the connecting pipe 9. When the hot coolant flows through the heat dissipation pipe 56, it exchanges heat with the fins 57 and transfers the heat to the fins 57. The fins 57 then exchange heat with the air and dissipate the heat into the air. Then, cold air is sent to the fins 57 through the heat dissipation fan 51 to blow away the hot air, thereby cooling the hot coolant. The cooled coolant enters the liquid outlet chamber 53 and then enters the integrated pump body 1 through the coolant inlet pipe 8 for recycling.

[0044] A method for preparing a solar panel cooling device with a straight tube core comprises the following steps:

[0045] Step 1: Preparation of straight tube core

[0046] Material selection: Use copper or aluminum alloy pipes and cut them into straight pipes of equal length (the length matches the solar panel);

[0047] Runner molding: Figure 9 As shown, the tube is pressed into a flat shape through a roller forming process to increase the contact area with the collector;

[0048] High frequency welding: such as Figure 10 As shown, high-frequency welding equipment is used to weld multiple straight pipes in parallel to the upper and lower manifolds to form parallel flow channels;

[0049] Step 2: Microchannel processing

[0050] Laser etching: Etching microchannels on aluminum substrates (width can be set to 0.5-1mm and depth to 0.3-0.5mm);

[0051] Composite process: The liquid collecting tube and the straight tube core are bonded by brazing or thermal conductive adhesive to ensure the heat conduction efficiency;

[0052] Step 3: Assemble the whole machine

[0053] Inclined setting: The straight tube core is inclined so that the upper collecting pipe is at the upper end of the straight tube core and the lower collecting pipe is at the lower end of the straight tube core;

[0054] Solar panel lamination: Laminating the solar panel to the surface of the liquid collecting tube with EVA film, and connecting and fixing the solar panel frame to the upper and lower liquid collecting tubes respectively, so that one side of the solar panel is in contact with several heat collecting straight tubes of the straight tube core;

[0055] Pump body integration: connect one end of the outlet pipe to the first liquid outlet of the integrated pump body, connect the other end of the outlet pipe to the second liquid inlet of the upper collecting pipe, connect one end of the inlet pipe to the first liquid inlet of the integrated pump body, and install a temperature sensor and a flow controller;

[0056] Heat exchange assembly assembly: Arrange the heat exchanger tubes and fins of the heat exchanger assembly at intervals, set the cooling fan on the front side of the heat exchanger core, connect the two ends of the heat exchanger tube to the liquid inlet chamber and the liquid outlet chamber respectively, and connect the liquid inlet chamber and the liquid outlet chamber to the integrated pump body and the lower collecting pipe respectively;

[0057] Shell packaging: such as Figure 11 As shown, an aluminum alloy shell is used to wrap the straight tube core or collector, and the shell is rolled and shaped to ensure sealing, thereby obtaining a solar panel cooling device with a straight tube core.

[0058] How it works

[0059] When sunlight shines on the solar panels, the panels generate electricity (produce electrical energy), and the waste heat is transferred to the straight tube core through the microchannel collector; the cooling medium flows through the straight tube core under the drive of the pump body, and the efficiency of the cooled solar panels is improved. After absorbing heat, the cooling medium enters the heat exchange component to release heat energy, and the cooled coolant enters the integrated pump body for recycling.

[0060] Photoelectric conversion: Solar panels absorb photons to generate electron-hole pairs, which then output direct current. Waste heat recovery: For every 1°C decrease in solar panel temperature, power generation efficiency increases by 0.4%-0.5%.

[0061] Heat exchange methods: 1) Liquid: Water or antifreeze flows through the microchannels, where it is heated and can be used for heating, hot water, or industrial heat. 2) Air: Air circulation dissipates heat, used in building ventilation or drying systems.

[0062] The present invention is a photoelectric-thermal integrated device that can generate electricity and collect heat energy simultaneously, with an overall energy efficiency of up to 70%-80% (traditional photovoltaic panels are only 15%-25%).

[0063] Example 1

[0064] The straight tube core is made of 4mm copper tubes, 1.2m long, with 20 connected in parallel on the manifold. The integrated pump body is set to a flow rate of 0.5L / min and a power of 15W. Test the working fluid outlet temperature, heat collection, pressure drop, and maximum temperature difference on the photovoltaic panel surface.

[0065] Comparative Example 1

[0066] The straight tube core is replaced by a spiral tube core, and the rest is the same as in Example 1.

[0067] Comparative Example 2

[0068] The straight tube core is replaced with an S-shaped circulation pipe, and the rest is the same as in Example 1.

[0069] The results of the tests of Example 1 and Comparative Examples 1-2 are shown in Table 1:

[0070] Table 1

[0071]

[0072] In Example 1, the working fluid outlet temperature was 27.7°C, the heat collection capacity was 1621W, the pressure drop was 3.83kPa, and the maximum temperature difference on the photovoltaic panel surface was 1.5°C. Compared with Comparative Examples 1-2, the present invention adopts a straight tube core design and optimizes the flow channel structure to improve heat exchange efficiency, reduce pressure drop, and lower the overall temperature difference.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A solar panel cooling device with a straight tube core, characterized in that: The invention comprises an integrated pump body (1), an upper liquid collecting pipe (2), a straight tube core (3), a lower liquid collecting pipe (4), a heat exchange component (5) and a solar panel (6); the integrated pump body (1) is connected to the upper liquid collecting pipe (2); the straight tube core (3) is arranged at an angle; the upper end of the straight tube core (3) is connected to the upper liquid collecting pipe (2); the lower end of the straight tube core (3) is connected to the lower liquid collecting pipe (4); the lower liquid collecting pipe (4) is connected to the right end of the heat exchange component (5); the left end of the heat exchange component (5) is connected to the integrated pump body (1); and the solar panel (6) is arranged on one side of the straight tube core (3).

2. A solar panel cooling device with a straight tube core according to claim 1, characterized in that: The upper end of the integrated pump body (1) is provided with a first liquid outlet (11) and an exhaust hole (12), respectively; the first liquid outlet (11) is connected to a water outlet pipe (7), and the water outlet pipe (7) is connected to an upper liquid collecting pipe (2).

3. The solar panel cooling device with a straight tube core according to claim 1, characterized in that: The lower end of the integrated pump body (1) is provided with a first liquid inlet (13) and a water discharge hole (14), respectively; the first liquid inlet (13) is connected to a water inlet pipe (8), and the water inlet pipe (8) is connected to the heat exchange component (5).

4. The solar panel cooling device with a straight tube core according to claim 1, characterized in that: The straight tube core (3) comprises a plurality of heat-collecting straight tubes (31), the plurality of heat-collecting straight tubes (31) are arranged at equal intervals, and a plurality of heat-collecting straight tubes (31) are arranged at an angle.

5. The solar panel cooling device with a straight tube core according to claim 1, characterized in that: A second liquid inlet (21) is provided on one side of the upper liquid collecting pipe (2), and the second liquid inlet (21) is connected to the water outlet pipe (7). A plurality of second liquid outlets (22) are provided on the other side of the upper liquid collecting pipe (2), and the second liquid outlets (22) are connected to the heat collecting straight pipe (31) through a first connector (23), and the first connector (23) is arranged to be inclined toward one side of the solar panel (6).

6. The solar panel cooling device with a straight tube core according to claim 1, characterized in that: A plurality of third liquid inlets (41) are provided on one side of the lower liquid collecting pipe (4), and the third liquid inlets (41) are connected to the heat collecting straight pipe (31) through a second connector (42), and the second connector (42) is inclined toward one side of the solar panel (6). A third liquid outlet (43) is provided on the other side of the lower liquid collecting pipe (4), and the third liquid outlet (43) is connected to a connecting pipe (9), and the connecting pipe (9) is connected to the heat exchange component (5).

7. The solar panel cooling device with a straight tube core according to claim 1, characterized in that: One side of the solar panel (6) is arranged in contact with the heat collecting straight pipe (31), and the solar panel (6) is arranged on a solar panel frame (61), and the solar panel frame (61) is respectively connected to the upper liquid collecting pipe (2) and the lower liquid collecting pipe (4).

8. The solar panel cooling device with a straight tube core according to claim 1, characterized in that: The heat exchange assembly (5) includes a heat exchange core and a cooling fan (51). A liquid inlet chamber (52) and a liquid outlet chamber (53) are respectively provided at both ends of the heat exchange core. A fourth liquid inlet (54) is provided on the liquid inlet chamber (52), and the fourth liquid inlet (54) is connected to a connecting pipe (9). A fourth liquid outlet (55) is provided on the liquid outlet chamber (53), and the fourth liquid outlet (55) is connected to a water inlet pipe (8). The cooling fan (51) is provided on the front side of the heat exchange core.

9. The solar panel cooling device with a straight tube core according to claim 8, characterized in that: The heat exchange core comprises a plurality of heat dissipation tubes (56) and a plurality of fins (57). The heat dissipation tubes (56) and the fins (57) are arranged at intervals. The two ends of the heat dissipation tubes (56) are respectively connected to the liquid inlet chamber (52) and the liquid outlet chamber (53).

10. A method for preparing a solar panel cooling device with a straight tube core, the solar panel cooling device with a straight tube core according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Preparation of straight tube core: First, select copper or aluminum alloy tubes and cut them into straight tubes of equal length. Then, use a roller forming process to press the tubes into a flat shape to increase the contact area with the collector. Then, use high-frequency welding equipment to weld multiple straight tubes in parallel to the upper and lower liquid collecting pipes to form parallel flow channels. Step 2: Microchannel processing: etching microchannels on the aluminum substrate, and then bonding the collector and the straight tube core by brazing or thermal conductive adhesive to ensure heat conduction efficiency; Step 3: Assemble the whole machine. First, tilt the straight tube core; then laminate the solar panel to the surface of the collecting pipe through EVA film, and fix the solar panel frame to the collecting pipe respectively; then connect the integrated pump body to the straight tube core, and set the temperature sensor and flow controller; then assemble the heat exchange component, and connect the liquid inlet chamber and liquid outlet chamber of the heat exchange component to the integrated pump body and the lower collecting pipe respectively; finally, use an aluminum alloy shell to wrap the straight tube core and the collector, and ensure the sealing by rolling and shaping, to obtain a solar panel cooling device with a straight tube core.

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