A photovoltaic module temperature control system

Abstract

The application discloses a photovoltaic module temperature control system, which is configured to be connected to a photovoltaic panel, the photovoltaic panel has a light-receiving surface and a back surface, and the photovoltaic module temperature control system comprises a frame body and a temperature control assembly. The frame body is provided with a through groove for nesting the back surface of the photovoltaic panel. The temperature control assembly comprises a plurality of temperature control pieces which are arranged at intervals and are distributed in an array along the surface of the back surface of the photovoltaic panel. The temperature control piece comprises a phase change energy storage part which is configured to be connected to the photovoltaic panel and abuts against the back surface of the photovoltaic panel, so that the temperature of the photovoltaic panel can be maintained within a preset temperature range. The application can effectively solve the problem that a person needs to clean the snow and ice on the photovoltaic panel after the photovoltaic panel is covered with snow or ice under cold conditions.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation equipment technology, and specifically to a photovoltaic module temperature control system. Background Technology

[0002] Photovoltaic power generation is one of the main ways to generate electricity using clean energy, and it has great significance in the fields of production, daily life, and ecological civilization construction.

[0003] Photovoltaic panels face severe challenges in cold and humid environments at high altitudes or during winter. For example, snow cover can completely block sunlight, and repeated freeze-thaw cycles and ice buildup can significantly reduce light transmittance and cause physical stress damage. Currently, among the conventional methods for dealing with power generation interruptions or even mechanical damage to photovoltaic panels caused by snow and ice accumulation in severe weather, passive hydrophobic coatings are prone to failure at low temperatures, while mechanical or electrothermal de-icing methods have problems such as high energy consumption, damage to the panel surface, or complex structure. Therefore, photovoltaic panels in cold high-altitude areas often require specialized personnel to clean snow and ice.

[0004] Therefore, there is an urgent need for a photovoltaic module temperature control system to solve the problem in existing technologies where snow or ice accumulation on photovoltaic panels under cold conditions requires specialized personnel to clean up the snow and ice. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a photovoltaic module temperature control system to solve the technical problem in the prior art that requires special personnel to clean up snow and ice after photovoltaic panels are covered with snow or ice under cold conditions.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This invention provides a photovoltaic module temperature control system configured to be connected to a photovoltaic panel, the photovoltaic panel having a light-receiving surface and a back-lighting surface, comprising: The frame has a through slot for embedding the backlight surface of the photovoltaic panel; and A temperature control component includes multiple temperature control elements, which are spaced apart from each other and arranged in an array along the surface of the backlight of the photovoltaic panel. Each temperature control element includes a phase change energy storage unit, which is configured to be connected to the photovoltaic panel and abut against the backlight of the photovoltaic panel, so that the temperature of the photovoltaic panel can be maintained within a preset temperature range.

[0007] In some embodiments, the photovoltaic module temperature control system further includes a superhydrophobic layer covering the light-receiving surface of the photovoltaic panel.

[0008] In some embodiments, the temperature control component further includes a sealing shell, the sealing shell being hollow inside and open at the top, the sealing shell being sealed to the back surface of the photovoltaic panel through its top opening, and forming a sealed cavity between the sealing shell and the back surface of the photovoltaic panel, the phase change energy storage unit being able to fill the sealed cavity and abut against the back surface of the photovoltaic panel.

[0009] In some embodiments, the opening end of the sealing shell is provided with an annular groove, and the temperature control component further includes an annular sealing portion, which is embedded in the annular groove and abuts against the back surface of the photovoltaic panel.

[0010] In some embodiments, a sealant is provided at the connection between the sealing shell and the backlight surface of the photovoltaic panel. The sealant is ring-shaped and is connected to both the sealing shell and the backlight surface of the photovoltaic panel.

[0011] In some embodiments, the temperature control component further includes a heating wire connected to the frame and extending along the length of the photovoltaic panel, wherein the heating wire abuts against the back surface of the photovoltaic panel and is connected to an external heat source.

[0012] In some embodiments, the heating wire has a plurality of first straight segments, a plurality of second straight segments, and a plurality of curved segments. The plurality of first straight segments are arranged parallel to and spaced apart along the width direction of the photovoltaic panel. The second straight segments are arranged between two adjacent first straight segments and perpendicular to the first straight segments. The plurality of curved segments are used to connect the relative first straight segments and second straight segments, so that the heating wire extends in a serpentine manner along the length direction of the photovoltaic panel.

[0013] In some embodiments, the photovoltaic module temperature control system further includes a cover, the cover having an "L"-shaped cross-section, the cover being detachably connected to the frame, and forming a receiving cavity between the cover and the frame for accommodating the photovoltaic panel, phase change energy storage unit, and heating wire.

[0014] In some embodiments, the photovoltaic module temperature control system further includes multiple blades, which are inclined upward relative to the cover and are all connected to the cover horizontally. Adjacent blades together form a ventilation slot that communicates with the receiving cavity.

[0015] In some embodiments, the frame has a plurality of slots along its circumference, and the photovoltaic module temperature control system further includes a plurality of inserts, the inserts being connected to the cover and insertable into the slots, and the cover being bonded to the frame.

[0016] Compared with existing technologies, the beneficial effects of the photovoltaic module temperature control system provided by this invention include: the photovoltaic panel is embedded in the through-slot of the frame, and the back surface of the photovoltaic panel is built into the through-slot; multiple phase change energy storage units are arranged at intervals and distributed in an array along the surface of the back surface of the photovoltaic panel; the phase change energy storage units are connected to the photovoltaic panel and abut against the back surface of the photovoltaic panel, so that the temperature of the photovoltaic panel can be maintained within a preset temperature range. Compared with existing technologies, the frame structure protects the back surface of the photovoltaic panel from being covered by snow, and by setting multiple phase change energy storage units on the surface of the back surface of the photovoltaic panel, the phase change energy storage units are in direct contact with the back surface of the photovoltaic panel, and by utilizing the heat absorption and heat release characteristics of the phase change energy storage units, the temperature of the photovoltaic panel can always be maintained within the preset temperature range. This can prevent the photovoltaic panel from being covered by snow or ice in cold conditions, thus avoiding the impact on the light transmittance and power generation efficiency of the photovoltaic panel. It can solve the technical problem in existing technologies where snow or ice accumulation on photovoltaic panels in cold conditions requires special personnel to clean the snow and ice. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a photovoltaic module temperature control system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram from another perspective of a photovoltaic module temperature control system provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of a photovoltaic module temperature control system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram from another perspective of a photovoltaic module temperature control system provided in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the connection between a photovoltaic panel, a temperature control component, and a superhydrophobic layer according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: Photovoltaic panel 100; frame 200; temperature control component 300; temperature control element 310; phase change energy storage unit 311; sealing shell 312; annular sealing part 313; sealant 314; heating wire 320; superhydrophobic layer 400; cover 500; blade 600; insert block 700. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the technical problem of requiring specialized personnel to clean snow and ice from photovoltaic (PV) panels after they become covered in snow or ice under cold conditions, this invention provides a PV module temperature control system. This system protects the back surface of the PV panel 100 from snow accumulation through a frame structure 200. Furthermore, by incorporating multiple phase-change energy storage units 311 on the surface of the back surface of the PV panel 100, and through direct contact between these units and the back surface, the system utilizes the heat absorption and release characteristics of the phase-change energy storage units 311 to maintain the temperature of the PV panel 100 within a preset temperature range. This prevents snow or ice accumulation on the PV panel 100 under cold conditions, thus avoiding any impact on its light transmittance and power generation efficiency.

[0021] Please see Figure 1 , Figure 1 , Figure 2 This is a schematic diagram of a photovoltaic module temperature control system according to an embodiment of the present invention. The photovoltaic module temperature control system is configured to be connected to a photovoltaic panel 100. The photovoltaic panel 100 has a light-receiving surface and a back-lighting surface. The photovoltaic module temperature control system includes a frame 200 and a temperature control component 300. The frame 200 has a through slot, and the photovoltaic panel 100 is embedded in the through slot. The back-lighting surface of the photovoltaic panel 100 is built into the through slot. The temperature control component 300 includes a plurality of temperature control elements 310. The plurality of temperature control elements 310 are arranged at intervals and are arrayed along the surface of the back-lighting surface of the photovoltaic panel 100. The temperature control element 310 includes a phase change energy storage unit 311. The phase change energy storage unit 311 is connected to the photovoltaic panel 100 and abuts against the back-lighting surface of the photovoltaic panel 100, so that the temperature of the photovoltaic panel 100 can be maintained within a preset temperature range.

[0022] In this device, compared to existing technologies, the back surface of the photovoltaic panel 100 is protected by the frame structure 200 to prevent it from being covered by snow. By setting multiple phase change energy storage units 311 on the surface of the back surface of the photovoltaic panel 100, and by having the phase change energy storage units 311 in direct contact with the back surface of the photovoltaic panel 100, and by utilizing the heat absorption and heat release characteristics of the phase change energy storage units 311, the temperature of the photovoltaic panel 100 can be maintained within a preset temperature range. This can prevent the photovoltaic panel 100 from being covered by snow or ice in cold conditions, thus avoiding affecting the light transmittance and power generation efficiency of the photovoltaic panel 100. This solves the technical problem in existing technologies where snow or ice accumulation on the photovoltaic panel in cold conditions requires dedicated personnel to clean the snow and ice.

[0023] Furthermore, the photovoltaic panel 100 here is a photovoltaic power generation structure that converts solar energy into electrical energy, which is common and readily available in the market. One side of the photovoltaic panel 100 is the light-receiving side, which is used to receive sunlight. The other side of the photovoltaic panel 100 is the back-light side, and the photovoltaic panel 100 junction box is provided on the back-light side. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0024] In some embodiments, the photovoltaic panel 100 is connected to a charging controller, a photovoltaic combiner box, a DC circuit breaker / disconnecting switch, a reverse protection diode / blocking diode, a fuse, and a battery via a photovoltaic panel junction box for storing electrical energy. This is a conventional setup known to those skilled in the art and will not be described in detail here.

[0025] In some embodiments, the frame 200 is made of a common and readily available material, such as aluminum alloy. The thickness of the frame 200 is greater than the thickness of the photovoltaic panel 100, which is used to protect the back surface of the photovoltaic panel 100.

[0026] Furthermore, the phase change energy storage unit 311 here is a phase change material that is common and readily available on the market. When the photovoltaic panel 100 is exposed to sunlight during the day or when its operating temperature rises, it absorbs and stores heat, resulting in a solid-liquid phase change. At night or when the ambient temperature drops to the preset phase change temperature range, it releases the stored latent heat of phase change, resulting in a liquid-solid phase change, in order to maintain the surface temperature of the photovoltaic panel 100 above the freezing point, inhibiting ice crystal nucleation and snow adhesion. During the high-temperature period in summer, it slows down the temperature rise of the photovoltaic panel 100 by melting and absorbing heat, thereby reducing its operating temperature.

[0027] Furthermore, in some embodiments, the phase change temperature range of the phase change energy storage unit 311 is 3°C to 5°C.

[0028] In this embodiment, as Figures 3 to 5 As shown, the temperature control device 310 also includes a sealing shell 312. The sealing shell 312 is hollow inside and open at the top. The sealing shell 312 is sealed to the back surface of the photovoltaic panel 100 through its top opening and forms a sealed cavity with the back surface of the photovoltaic panel 100. The phase change energy storage unit 311 can fill the sealed cavity and abut against the back surface of the photovoltaic panel 100.

[0029] The sealing shell 312 is used to connect the phase change energy storage unit 311 to the back surface of the photovoltaic panel 100 so that the phase change energy storage unit 311 can act stably on the photovoltaic panel 100.

[0030] Furthermore, the sealing shell 312 here adopts an open acrylic box structure, and its upper side is closely attached to the back surface of the photovoltaic panel 100, so that the internal phase change material can directly contact the photovoltaic panel 100. This attachment design facilitates subsequent maintenance and replacement, and on the other hand, it can prevent the phase change material from accumulating at the bottom due to gravity after the solid-liquid phase change, ensuring that the photovoltaic panel 100 can be heated evenly when the phase change material releases heat.

[0031] In some embodiments, the sealing shell 312 can be connected to the photovoltaic panel 100 by adhesive bonding or fastener thread connection, which will not be described in detail here.

[0032] In one embodiment, such as Figure 5 As shown, the opening end of the sealing shell 312 is provided with an annular groove, and the temperature control component 310 also includes an annular sealing part 313, which is embedded in the annular groove and abuts against the back surface of the photovoltaic panel 100.

[0033] The annular sealing part 313 is used to increase the airtightness between the sealing shell 312 and the photovoltaic panel 100.

[0034] Furthermore, the annular sealing part 313 here is a perfluoroether rubber ring that is common and readily available on the market. The material of perfluoroether rubber can effectively block the penetration of organic small molecule phase change materials, which will not be elaborated here.

[0035] In one embodiment, such as Figure 5 As shown, a sealant 314 is also provided at the connection between the sealing shell 312 and the backlight surface of the photovoltaic panel 100. The sealant 314 is ring-shaped and is connected to both the sealing shell 312 and the backlight surface of the photovoltaic panel 100.

[0036] The annular sealing part 313 and the sealant 314 form a double-layer sealing structure, which can further ensure that the phase change material will not leak during repeated phase changes.

[0037] Furthermore, the sealant 314 is distributed circumferentially along the sealing shell 312, which can enhance the bonding strength between the sealing shell 312 and the photovoltaic panel 100.

[0038] In this embodiment, as Figure 5 As shown, the photovoltaic module temperature control system also includes a superhydrophobic layer 400, which covers the light-receiving surface of the photovoltaic panel 100.

[0039] The super-conductive layer is used to reduce the surface energy of the photovoltaic panel 100 to promote droplet roll-off.

[0040] Furthermore, the superhydrophobic layer 400 adopts a micro-nano secondary rough structure designed based on biomimetic principles, combined with low surface energy chemical modification; when water droplets come into contact with this surface, a Cassie-Baxter wetting state with a contact angle greater than 150° and a roll-off angle less than 10° is formed, thereby effectively preventing water droplets from accumulating and freezing on the surface of the photovoltaic panel 100 for a long time.

[0041] In some embodiments, under snow conditions, the snow melts rapidly due to the photovoltaic panel 100's operating temperature being higher than the freezing point, and the structural characteristics of the superhydrophobic layer 400 can guide the melted snow water to flow away quickly, preventing it from re-icing on the surface.

[0042] Furthermore, the hydrophobic properties of the superhydrophobic layer 400 allow rainwater or snowmelt to carry away dust and contaminants from the surface during the rolling process, achieving a self-cleaning function and thus maintaining the cleanliness and high light transmittance of the photovoltaic panel 100's light-receiving surface for a long time.

[0043] In this embodiment, as Figure 4 As shown, the temperature control component 300 also includes a heating wire 320, which is connected to the frame 200 and extends along the length of the photovoltaic panel 100. The heating wire 320 abuts against the backlight surface of the photovoltaic panel 100 and is connected to an external heat source.

[0044] By adding a heating wire 320 to the back surface of the photovoltaic panel 100, heat can be transferred directly to the photovoltaic panel 100 through an external heat source, thereby improving the temperature control effect.

[0045] Furthermore, the heating wire 320 here is at least one of the commonly available and readily procurable resistance heating wire 320, electric heating film, and graphene heating plate.

[0046] Furthermore, the photovoltaic module temperature control system also includes a temperature sensor and a control component. The temperature sensor is connected to the photovoltaic panel 100 to monitor the surface temperature of the photovoltaic panel 100. The control component is electrically connected to the temperature sensor and the external heat source of the heating wire 320 to achieve automation and intelligence. The temperature sensor and control component are conventional settings known to those skilled in the art and will not be described in detail here.

[0047] In some embodiments, the heating wire 320 serves as a backup or auxiliary setting in the temperature control component 300. When the surface temperature of the photovoltaic panel 100 is lower than the preset de-icing threshold and the heat release rate of the phase change energy storage layer is lower than the preset rate, the auxiliary heating device is activated.

[0048] In one embodiment, such as Figure 4As shown, the heating wire 320 has multiple first straight segments, multiple second straight segments, and multiple curved segments. The multiple first straight segments are parallel to and spaced apart along the width direction of the photovoltaic panel 100. The second straight segments are disposed between two adjacent first straight segments and perpendicular to the first straight segments. The multiple curved segments are used to connect the relative first straight segments and the second straight segments, so that the heating wire 320 extends in a serpentine manner along the length direction of the photovoltaic panel 100.

[0049] The heating wire 320 is arranged in a serpentine pattern along the surface of the photovoltaic panel 100 by multiple first straight segments, multiple second straight segments and multiple curved segments, so as to achieve uniform heating of the photovoltaic panel 100 and increase the contact area between the heating wire 320 and the photovoltaic panel 100, thereby enhancing the temperature control effect.

[0050] Furthermore, the heating wire 320 here can also be in the form of a disc or a mesh, which will not be elaborated here.

[0051] In this embodiment, as Figures 1 to 4 As shown, the photovoltaic module temperature control system also includes a cover 500, the cross-section of which is "L" shaped. The cover 500 is detachably connected to the frame 200 and forms a receiving cavity between the cover 500 and the frame 200 to accommodate the photovoltaic panel 100, the phase change energy storage unit 311, and the heating wire 320.

[0052] The cover 500 and the frame 200 are detachably connected, enclosing the photovoltaic panel 100, the phase change energy storage unit 311 and the heating wire 320 within the housing cavity, thus preventing the photovoltaic panel 100, the phase change energy storage unit 311 and the heating wire 320 from being directly exposed to wind and snow.

[0053] Furthermore, the cover 500 here is made of a common and readily available material on the market, such as aluminum alloy. The thickness of the cover 500 is greater than the thickness of the photovoltaic panel 100, and it is used to form protection for the back surface of the photovoltaic panel 100.

[0054] In some embodiments, the cover 500 and the frame 200 are connected by adhesive or fastener threads to facilitate later inspection or maintenance, which will not be elaborated here.

[0055] In one embodiment, such as Figures 2 to 4 As shown, the photovoltaic module temperature control system also includes multiple blades 600. The multiple blades 600 are inclined upward relative to the cover 500 and are all connected to the cover 500 across it. The two adjacent blades 600 together form a ventilation slot that communicates with the receiving cavity.

[0056] Multiple blades 600 are spaced apart from each other and connected to the cover 500 to form multiple ventilation slots that communicate with the receiving cavity. Their structure is similar to louvers, which enables the phase change energy storage unit 311 to exchange heat and dissipate heat with the external environment in high-temperature environments, thereby cooling the photovoltaic panel 100.

[0057] Furthermore, the multiple blades 600 connected to the cover 500 can also provide support for the photovoltaic panel 100, the phase change energy storage unit 311, and the heating wire 320.

[0058] In one embodiment, such as Figure 4 As shown, the frame 200 has multiple slots along its circumference. The photovoltaic module temperature control system also includes multiple inserts 700. The inserts 700 are connected to the cover 500 and can be inserted into the slots. The cover 500 is bonded to the frame 200.

[0059] The structure of the insert 700 and the slot is designed to facilitate the connection and installation of the cover 500 and the frame 200.

[0060] Furthermore, the insert 700 can also restrict the relative displacement between the cover 500 and the frame 200, thereby improving the connection strength.

[0061] To better understand this invention, the following is combined with... Figures 1 to 5 The technical solution of the present invention will be described in detail below: A photovoltaic panel 100 is embedded in a through-slot of a frame 200, with the backlight surface of the photovoltaic panel 100 also embedded within the through-slot. Multiple phase-change energy storage units 311 are spaced apart and arranged in an array along the surface of the backlight surface of the photovoltaic panel 100. The phase-change energy storage units 311 are connected to the photovoltaic panel 100 and abut against its backlight surface, ensuring that the temperature of the photovoltaic panel 100 is maintained within a preset temperature range. Compared to existing technologies, the frame 200 structure protects the backlight surface of the photovoltaic panel 100 from snow accumulation. By placing multiple phase-change energy storage units 311 on the surface of the backlight surface of the photovoltaic panel 100, and through direct contact between the phase-change energy storage units 311 and the backlight surface of the photovoltaic panel 100, and utilizing the heat absorption and release characteristics of the phase-change energy storage units 311, the temperature of the photovoltaic panel 100 can be consistently maintained within a preset temperature range, preventing snow or ice accumulation on the photovoltaic panel 100 under cold conditions.

[0062] In the specific working process of the present invention, when the photovoltaic panel 100 operates under sunlight or its operating temperature rises during the day, the phase change energy storage unit 311 can absorb and store heat. At night or when the ambient temperature drops to a preset phase change temperature range, the stored latent heat of phase change is released to maintain the surface temperature of the photovoltaic panel 100 above the freezing point, thereby inhibiting ice crystal nucleation and snow accumulation. During the high-temperature period in summer, the photovoltaic panel 100's temperature rise is slowed down by melting and absorbing heat, thus reducing its operating temperature.

[0063] Furthermore, when the surface temperature of the photovoltaic panel 100 is lower than the preset de-icing threshold and the heat release rate of the phase change energy storage layer is lower than the preset rate, the heating wire 320 is activated as an auxiliary heating device to maintain the temperature of the photovoltaic panel 100 within the preset temperature range, thereby effectively preventing the photovoltaic panel 100 from being covered by snow or from freezing.

[0064] This application, through the aforementioned structure, avoids affecting the light transmittance and power generation efficiency of the photovoltaic panel 100, and can solve the technical problem in the prior art that requires special personnel to clean up snow and ice after the photovoltaic power generation panel is covered by snow or ice in cold conditions.

[0065] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A photovoltaic module temperature control system, configured to be connected to a photovoltaic panel, the photovoltaic panel having a light-receiving surface and a back-lighting surface, characterized in that, include: The frame has a through slot for embedding the backlight surface of the photovoltaic panel; and A temperature control component includes multiple temperature control elements, which are spaced apart from each other and arranged in an array along the surface of the backlight of the photovoltaic panel. Each temperature control element includes a phase change energy storage unit, which is configured to be connected to the photovoltaic panel and abut against the backlight of the photovoltaic panel, so that the temperature of the photovoltaic panel can be maintained within a preset temperature range.

2. The photovoltaic module temperature control system according to claim 1, characterized in that, The photovoltaic module temperature control system also includes a superhydrophobic layer, which covers the light-receiving surface of the photovoltaic panel.

3. The photovoltaic module temperature control system according to claim 1, characterized in that, The temperature control component also includes a sealing shell, which is hollow inside and open at the top. The sealing shell is sealed to the back surface of the photovoltaic panel through its top opening and forms a sealed cavity with the back surface of the photovoltaic panel. The phase change energy storage unit can fill the sealed cavity and abut against the back surface of the photovoltaic panel.

4. The photovoltaic module temperature control system according to claim 3, characterized in that, The sealing shell has an annular groove at its open end, and the temperature control component also includes an annular sealing part, which is embedded in the annular groove and abuts against the back surface of the photovoltaic panel.

5. The photovoltaic module temperature control system according to claim 4, characterized in that, A sealant is also provided at the connection between the sealing shell and the back surface of the photovoltaic panel. The sealant is ring-shaped and is connected to both the sealing shell and the back surface of the photovoltaic panel.

6. The photovoltaic module temperature control system according to claim 4, characterized in that, The temperature control component also includes a heating wire, which is connected to the frame and extends along the length of the photovoltaic panel. The heating wire abuts against the back surface of the photovoltaic panel and is connected to an external heat source.

7. The photovoltaic module temperature control system according to claim 6, characterized in that, The heating wire has multiple first straight segments, multiple second straight segments, and multiple curved segments. The multiple first straight segments are parallel to and spaced apart along the width direction of the photovoltaic panel. The second straight segments are disposed between two adjacent first straight segments and perpendicular to the first straight segments. The multiple curved segments are used to connect the relative first straight segments and second straight segments, so that the heating wire extends in a serpentine shape along the length direction of the photovoltaic panel.

8. The photovoltaic module temperature control system according to claim 6, characterized in that, The photovoltaic module temperature control system also includes a cover, the cross-section of which is "L" shaped. The cover is detachably connected to the frame and forms a receiving cavity with the frame to accommodate the photovoltaic panel, phase change energy storage unit and heating wire.

9. The photovoltaic module temperature control system according to claim 8, characterized in that, The photovoltaic module temperature control system also includes multiple blades, which are inclined upward relative to the cover and are all connected to the cover horizontally. Adjacent blades together form a ventilation slot that communicates with the receiving cavity.

10. The photovoltaic module temperature control system according to claim 8, characterized in that, The frame has multiple slots along its circumference, and the photovoltaic module temperature control system also includes multiple inserts. The inserts are connected to the cover and can be inserted into the slots, and the cover is bonded to the frame.

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