Edge frame for a solar collector and solar collector

Abstract

The utility model discloses a kind of frame of solar collector and solar collector, solar collector includes photovoltaic panel and the multiple heat collecting branch pipes of the back side of photovoltaic panel;Frame includes main frame, the main frame includes the pipe body with internal flow channel and the mounting structure being set on pipe body, mounting structure is set as the edge of installation photovoltaic panel and the end of heat collecting branch pipe, and can make heat collecting branch pipe and internal flow channel communicate.The scheme provided by the utility model can reduce the overall weight of solar collector, and is conducive to increasing the coverage area of heat collecting branch pipe on photovoltaic panel, improve photo-thermal utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of solar energy technology, and more specifically, to a frame for a solar collector and a solar collector. Background Technology

[0002] Photovoltaic-thermal integrated systems combine solar collectors and photovoltaic modules to form a composite structure. This system provides electricity to buildings and recovers waste heat from the photovoltaic panels via a heat exchange medium (such as water or air) to meet heating and hot water needs, making it an effective way to achieve building energy conservation. To further improve the system's photovoltaic and solar thermal utilization efficiency, the structure of solar collectors has evolved from welded tube-plate types and bare-plate types to blown-inflated types. Besides the structural design of the collector itself, the installation and fixing methods between the collector and the photovoltaic panels, as well as the coordination and matching of their weight and cost, remain key issues facing photovoltaic-thermal systems.

[0003] Currently, the coupling method between the collector and the photovoltaic panel is mostly fixed by adhesive bonding or stamping. Moreover, the outer envelope size of the collector is usually limited by the aluminum frame of the photovoltaic panel, which to some extent reduces the contact area between the collector and the photovoltaic panel and increases the weight of the product. Utility Model Content

[0004] This utility model provides a frame for a solar collector and a solar collector to solve the problem that the assembly method of photovoltaic panels and collectors in the prior art results in a small contact area between the two and an increase in product weight.

[0005] An embodiment of this application provides a frame for a solar collector, the solar collector including a photovoltaic panel and a plurality of heat collection branches located on the back side of the photovoltaic panel; The frame includes a main frame, which includes a tube with an internal flow channel and an installation structure disposed on the tube. The installation structure is configured to install the edge of the photovoltaic panel and the end of the heat collection branch pipe, and enables the heat collection branch pipe to communicate with the internal flow channel.

[0006] In one embodiment, the mounting structure includes a first main clamping plate and a second main clamping plate fixed to the pipe body, and an insertion hole provided on the pipe body that communicates with the internal flow channel, the insertion hole being located between the first main clamping plate and the second main clamping plate. The space between the first main clamping plate and the second main clamping plate is for the photovoltaic panel and the heat collection branch pipe to be inserted and installed, and the insertion hole is for the end of the heat collection branch pipe to be inserted.

[0007] In one embodiment, the tube body is provided with an installation plane, and the first main clamping plate, the second main clamping plate and the insertion hole are disposed on the installation plane.

[0008] In one embodiment, the first main clamping plate is disposed on the back side of the photovoltaic panel, and the second main clamping plate is disposed on the front side of the photovoltaic panel, wherein the width of the second main clamping plate is smaller than the width of the first main clamping plate.

[0009] In one embodiment, the main frame further includes a bent plate connected to the tube body and bent toward the rear side of the photovoltaic panel, the bent plate being configured to be mounted on a predetermined structure for mounting a solar collector having the frame via the bent plate.

[0010] In one embodiment, the bent plate is provided with mounting holes, which are configured to fix the bent plate to the predetermined structure by fasteners.

[0011] In one embodiment, the frame includes two main frames and auxiliary frames respectively connected to both ends of the main frames. The two main frames are configured to be installed on opposite sides of the photovoltaic panel, and the two auxiliary frames are configured on the other two sides of the photovoltaic panel.

[0012] In one embodiment, the auxiliary frame includes a first auxiliary clamping plate, a second auxiliary clamping plate, and a side plate connecting the first auxiliary clamping plate and the second auxiliary clamping plate. The first auxiliary clamping plate, the second auxiliary clamping plate, and the side plate form a receiving groove for accommodating the side of the photovoltaic panel.

[0013] In one embodiment, the first auxiliary clamping plate is disposed on the back side of the photovoltaic panel, and the second auxiliary clamping plate is disposed on the front side of the photovoltaic panel, wherein the width and thickness of the first auxiliary clamping plate are set to be the same as those of the first main clamping plate, and the width and thickness of the second auxiliary clamping plate are set to be the same as those of the second main clamping plate.

[0014] In one embodiment, the main frame is provided with a fluid inlet and / or a fluid outlet; The fluid inlet and / or the fluid outlet are provided on the end face of the pipe body, or the fluid inlet and / or the fluid outlet are provided on the side wall of the pipe body.

[0015] Embodiments of this application also provide a solar collector, including a photovoltaic panel, a plurality of heat collection branches located on the back side of the photovoltaic panel, and a frame as described above, wherein the photovoltaic panel and the plurality of heat collection branches are all mounted on the frame.

[0016] In one embodiment, the cross-section of the heat collection branch pipe is flat.

[0017] In one embodiment, each of the heat collection branch pipes includes a pipe body and bending joints installed on the frame at both ends of the pipe body. The bending joints are configured to bend away from the photovoltaic panel so that the pipe body is in contact with the photovoltaic panel.

[0018] In the embodiments of this application, the frame can serve as both the frame of the photovoltaic panel and the fluid distribution pipe of the heat collection branch pipe. This solves the cost problem associated with setting up a separate distribution pipe on the collector, which helps reduce material consumption and the overall weight of the solar collector. In addition, installing the heat collection branch pipe directly on the frame of the photovoltaic panel can increase the coverage area of ​​the heat collection branch pipe on the photovoltaic panel, thereby improving the efficiency of solar thermal utilization.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0021] Figure 1 This is a schematic diagram of the connection between the frame, the photovoltaic panel, and the heat collection branch pipe according to an embodiment of this application; Figure 2 for Figure 1 The diagram shown is a structural schematic viewed from the end. Figure 3 This is a schematic diagram of the connection between the frame, the photovoltaic panel, and the heat collection branch pipe according to another embodiment of this application; Figure 4 for Figure 3 A schematic diagram of the structure shown from the other side; Figure 5 It displays the structure of multiple main borders; Figure 6 The structure with a fluid inlet set on the main frame is shown; Figure 7 This is a schematic diagram of the structure of a solar collector according to one embodiment of this application; Figure 8 This is a schematic diagram of the structure of a solar collector according to another embodiment of this application; Figure 9 for Figure 8 The diagram shown is a structural schematic of the solar collector viewed from the back. Figure 10 This is a schematic diagram of the structure of a solar collector according to another embodiment of this application; Figure 11This is a schematic diagram of the structure of a solar collector in another embodiment of this application; Figure 12 This is a partial structural schematic diagram of a solar collector according to one embodiment of this application; Figure 13 This is a schematic diagram of the structure of the heat collection branch pipe according to one embodiment of this application; Figure 14 This is a schematic cross-sectional view of the heat collection branch pipe according to another embodiment of this application; Figure 15 This is a schematic cross-sectional view of the heat collection branch pipe according to another embodiment of this application; Figure 16 This is a schematic cross-sectional view of the heat collection branch pipe according to another embodiment of this application.

[0022] Explanation of reference numerals in the attached figures: 1-Main frame; 101-Pipe body; 1011-Internal flow channel; 1012-Insertion hole; 1021-Mounting hole; 102-Bending plate; 103-First main clamping plate; 104-Second main clamping plate; 11-First main frame; 12-Second main frame; 110-Fluid inlet; 120-Fluid outlet; 111-Inlet distribution pipe section; 112-First intermediate distribution pipe section; 113-Second intermediate distribution pipe section; 114-Third intermediate distribution pipe section; 115-Fourth intermediate distribution pipe section; 116-Outlet distribution pipe section; 117-Partition section; 2-Photovoltaic panel; 3-Heat collector branch pipe; 301-Pipe body; 302-Bending joint; 303-Channel; 4-Auxiliary frame; 401-First auxiliary clamping plate; 402-Second auxiliary clamping plate; 403-Side plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0024] Embodiments of this application provide a frame for a solar collector, the solar collector including a photovoltaic panel 2 and multiple heat collection branch pipes 3 located on the back side of the photovoltaic panel 2. For example... Figures 1-4 As shown, the frame includes a main frame 1, which has a tube body 101 with an internal flow channel 1011 and an installation structure on the tube body 101. The installation structure is configured to install the edge of the photovoltaic panel 2 and the end of the heat collection branch pipe 3, and enables the heat collection branch pipe 3 to communicate with the internal flow channel 1011.

[0025] In the embodiment of this application, the main frame 1 can serve as both the frame of the photovoltaic panel 2 and the fluid distribution pipe connected to the end of the heat collection branch pipe 3. This solves the cost problem caused by setting a separate fluid distribution pipe on the collector, which helps to reduce material consumption and the overall weight of the solar collector. In addition, by directly installing the heat collection branch pipe 3 on the frame of the photovoltaic panel 2, the coverage area of ​​the heat collection branch pipe 3 on the photovoltaic panel 2 can be increased, thereby improving the photothermal utilization efficiency.

[0026] In one embodiment, such as Figures 1-4 As shown, the main frame 1 includes a pipe body 101 with an internal flow channel 1011. The pipe body 101 is provided with an installation structure for mounting a photovoltaic panel 2 and a heat collection branch pipe 3. The installation structure includes a first main clamping plate 103 and a second main clamping plate 104 fixed on the pipe body 101, and an insertion hole 1012 provided on the pipe body 101 that communicates with the internal flow channel 1011. The insertion hole 1012 is located between the first main clamping plate 103 and the second main clamping plate 104. The space between the first main clamping plate 103 and the second main clamping plate 104 is used for inserting and installing the photovoltaic panel 2 and the heat collection branch pipe 3. The insertion hole 1012 is used for inserting the end of the heat collection branch pipe 3, so that the heat collection branch pipe 3 communicates with the internal flow channel 1011 through the insertion hole 1012. To prevent liquid from leaking from the insertion hole 1012, the heat collection branch pipe 3 can be welded to the insertion hole 1012.

[0027] To facilitate the installation of the first main clamping plate 103, the second main clamping plate 104, and the insertion hole 1012 on the tube body 101, the side of the tube body 101 facing the photovoltaic panel 2 can be formed as an installation plane. The first main clamping plate 103, the second main clamping plate 104, and the insertion hole 1012 can be set in the middle of the installation plane or on the side close to the installation plane. The first main clamping plate 103 and the second main clamping plate 104 can be fixed on the installation plane by welding.

[0028] exist Figures 1-4 In this embodiment, the tube 101 is a square tube, but the tube 101 can also be a tube of other shapes, see reference. Figure 5 As shown.

[0029] In one embodiment, the width of the second main clamping plate 104 is smaller than the width of the first main clamping plate 103. The first main clamping plate 103 is disposed on the back of the photovoltaic panel 2, and the second main clamping plate 104 is disposed on the front of the photovoltaic panel 2. By placing the wider first main clamping plate 103 on the back of the photovoltaic panel 2, the photovoltaic panel 2 can be stably supported. By placing the narrower second main clamping plate 104 on the front of the photovoltaic panel 2, the shading of the photovoltaic panel 2 can be reduced, allowing it to receive sunlight on a larger area.

[0030] It is understood that the installation structure for mounting the photovoltaic panel 2 and the heat collection branch pipe 3 on the main frame 1 is not limited to the one shown above, and there can be multiple installation methods, which are not limited here. For example, a socket 1012 and a mounting plate located on the front of the photovoltaic panel can be provided on the pipe body 101. The heat collection branch pipe 3 is inserted into the socket 1012 for installation, and the back of the photovoltaic panel 2 abuts against the heat collection branch pipe 3, while the front abuts against the mounting plate.

[0031] In one embodiment, such as Figure 1 and Figure 2 As shown, the main frame 1 may also include a bent plate 102 connected to the tube body 101 for bending towards the back side of the photovoltaic panel 2. The bent plate 102 is configured to be installed on a predetermined structure for mounting a solar collector having the main frame 1. The bent plate 102 can be bent into an L-shape, C-shape, or other structures convenient for installation. The bent plate 102 may have bolt holes or other structures for fixing it. When installing the solar collector, the bent plate 102 can be hung on certain structures such as buildings. The bent plate 102 may also have mounting holes 1021 for fixing it to the predetermined structure using fasteners such as bolts passing through the mounting holes 1021.

[0032] In one embodiment, such as Figure 3 and Figure 4 As shown, and with reference Figure 8 and Figure 9 The frame includes two main frames 1 and auxiliary frames 4 connected to both ends of the main frames 1. The two main frames 1 are installed on opposite sides of the photovoltaic panel 2, and the two auxiliary frames 4 are located on the other two sides of the photovoltaic panel 2. The two main frames 1 and the two auxiliary frames 4 can better fix the photovoltaic panel 2 around its perimeter.

[0033] Figure 7 In the provided solar collector, the frame includes main frame 1 on opposite sides of the photovoltaic panel 2, namely the first main frame 11 and the second main frame 12. Figures 8-9 In the provided solar collector, the frame includes a main frame 1 set on each of the opposite sides of the photovoltaic panel 2 and an auxiliary frame 4 set on the other opposite sides.

[0034] exist Figure 3 and Figure 4 In one embodiment, the auxiliary frame 4 includes a first auxiliary clamping plate 401, a second auxiliary clamping plate 402, and a side plate 403 connecting the first auxiliary clamping plate 401 and the second auxiliary clamping plate 402. The first auxiliary clamping plate 401, the second auxiliary clamping plate 402, and the side plate 403 form a receiving groove for accommodating the side of the photovoltaic panel 2.

[0035] In this embodiment, a first auxiliary clamping plate 401 is disposed on the back of the photovoltaic panel 2, and a second auxiliary clamping plate 402 is disposed on the front of the photovoltaic panel 2. The width and thickness of the first auxiliary clamping plate 401 are set to be the same as the first main clamping plate 103, and the width and thickness of the second auxiliary clamping plate 402 are set to be the same as the second main clamping plate 104. This ensures that the panels fixing the photovoltaic panel 2 are uniform in size and appearance.

[0036] To connect the first main clamping plate 103, the second main clamping plate 104, the first auxiliary clamping plate 401, and the second auxiliary clamping plate 402 on one side of the photovoltaic panel 2 to form a sealing ring, the two ends of the first auxiliary clamping plate 401 are respectively connected to the first main clamping plate 103 and the second main clamping plate 104 by bevels, and the two ends of the second auxiliary clamping plate 402 are respectively connected to the first main clamping plate 103 and the second main clamping plate 104 by bevels. The two ends of the side plate 403 of the auxiliary frame 4 can be fixed to the corresponding end of the tube 101, which can be done by welding. In this way, the auxiliary frame 4 is more firmly fixed to the main frame 1 at both ends.

[0037] To allow fluid to enter the solar collector's collector branch pipe 3, a fluid inlet 110 and / or a fluid outlet 120 are provided on the main frame 1. The fluid inlet 110 and / or fluid outlet 120 can be provided on the end face of the pipe body 101, or the end face of the pipe body 101 can be closed, with the fluid inlet 110 and / or fluid outlet 120 provided on the side wall of the pipe body 101. For example, an inlet 110 and a fluid outlet 120 can be provided at both ends of the pipe body 101 in one main frame 1; or, a fluid inlet 110 can be provided on one end face of the pipe body 101 in one main frame 1, and a fluid outlet 120 can be provided on the end face of the pipe body 101 in the other main frame 1; or, a fluid inlet 110 can be provided on the end face of the pipe body 101 in one main frame 1, and a fluid outlet 120 can be provided on the side wall; or, both the fluid inlet 110 and fluid outlet 120 can be provided on the side wall of the pipe body 101. The specific arrangement can be reasonably determined according to the fluid supply requirements. Figure 6 The structure shown has a fluid inlet 110 provided on the side wall of the tube body 101. Figure 7 and Figure 8 The structure is shown with a fluid inlet 110 and a fluid outlet 120 provided on the end face of the main frame 1.

[0038] Embodiments of this application also provide a solar collector, such as... Figures 7-11 As shown, it includes a photovoltaic panel 2, multiple heat collection branch pipes 3 located on the back side of the photovoltaic panel 2, and a frame as described above. The photovoltaic panel 2 and the multiple heat collection branch pipes 3 are all installed on the frame.

[0039] In some embodiments, the cross-section of the heat collection branch pipe 3 is flat, that is, the heat collection branch pipe 3 is a flat pipe. The flat pipe can contact the surface of the photovoltaic panel 2, thereby increasing the heat transfer area with the photovoltaic panel 2 and improving the heat collection effect.

[0040] Among them, the heat collection branch pipe 3 can be glued to the photovoltaic panel 2 to increase the firmness of the assembly between the heat collection branch pipe 3 and the photovoltaic panel 2. Fixing the heat collection branch pipe 3 to the photovoltaic panel 2 can facilitate the assembly with the frame and improve the assembly efficiency.

[0041] In one embodiment, the heat collection branch pipe 3 has multiple channels 303 arranged along its width direction inside. For example... Figures 13-16 Various structural forms of heat collection branch pipes 3 are provided. By setting multiple channels 303 inside the heat collection branch pipe 3, the fluid flowing inside can have a larger contact area with the heat collection branch pipe 3, which is more conducive to removing heat from the heat collection branch pipe 3 and improving heat collection efficiency.

[0042] exist Figure 14 In the example, the heat collection branch pipe 3 divides the internal cavity into multiple channels 303 by setting a bending plate inside the flat tube; Figure 15 The example provided shows that the heat collection branch pipe 3 is formed by multiple bending of the plate. Figure 16 The example provided shows that the heat collection branch pipe 3 is formed by extrusion.

[0043] It is understood that the structure of the heat collection branch pipe 3 is not limited to that described above. In addition, the heat collection branch pipe 3 is not limited to a flat pipe, but can also be a circular pipe or a pipe with other structural forms.

[0044] In one example, such as Figure 12 As shown, each heat collection branch pipe 3 includes a pipe body 301 and a bending joint 302 installed on the frame 1 at both ends of the pipe body 301. The bending joint 302 is configured to bend away from the photovoltaic panel 2 so that the pipe body 301 is attached to the photovoltaic panel 2.

[0045] In some embodiments, such as Figure 7 As shown, the frame of the solar collector includes main frames 1 respectively arranged on opposite sides of the photovoltaic panel 2. Figures 8-9 In this embodiment, the frame of the solar collector includes a main frame 1 disposed on opposite sides of the photovoltaic panel 2 and an auxiliary frame 4 disposed on the other two sides. The main frame 1 at one end of the photovoltaic panel 2 can be referred to as the first main frame 11, and the main frame 1 at the other end can be referred to as the second main frame 12. One end of each heat collection branch pipe 3 is connected to the first main frame 11, and the other end of each heat collection branch pipe 3 is connected to the second main frame 12.

[0046] exist Figures 8-10In this embodiment, the heat collection branch pipe 3 is a straight pipe. Figure 11 In this embodiment, the heat collection branch pipe 3 is a serpentine pipe, but the heat collection branch pipe 3 can also be a pipe of other shapes.

[0047] Figure 7 -and Figure 9 In the embodiment, the first main frame 11 and the second main frame 12 at both ends of the photovoltaic panel 2 are each an integral fluid distribution pipe. After the fluid entering the first main frame 11 from the fluid inlet 110 is distributed to multiple heat collection branch pipes 3, the fluid enters the second main frame 12 from the heat collection branch pipes 3 and then flows out from the fluid outlet 120 of the second main frame 12.

[0048] exist Figure 10 In this embodiment, the main frame 1 at both ends of the photovoltaic panel 2 includes multiple fluid distribution pipe sections. A partition 117 is provided between each pair of adjacent fluid distribution pipe sections, and the partition 117 is configured to disconnect the connection between the two adjacent fluid distribution pipe sections. The multiple fluid distribution pipe sections at both ends of the photovoltaic panel 2 include an inlet distribution pipe section 111 with a fluid inlet 110, an outlet distribution pipe section 116 with a fluid outlet 120, and at least one intermediate distribution pipe section closed at both ends. Multiple heat collection branch pipes 3 form multiple parallel pipe groups. The fluid flow direction within the multiple heat collection branch pipes 3 in each parallel pipe group is the same, while the fluid flow direction within two adjacent parallel pipe groups is opposite. The inlet distribution pipe section 111 and the outlet distribution pipe section 116 are each connected to a parallel pipe group, and each intermediate distribution pipe section is connected to two adjacent parallel pipe groups. Thus, each intermediate distribution pipe section can connect two adjacent parallel pipe groups in series, meaning that the fluid in one parallel pipe group flows to another adjacent parallel pipe group through the intermediate distribution pipe section.

[0049] like Figure 10 As shown, the intermediate distribution pipe sections are the first intermediate distribution pipe section 112, the second intermediate distribution pipe section 113, the third intermediate distribution pipe section 114, and the fourth intermediate distribution pipe section 115. The fluid entering the inlet distribution pipe section 111 from the fluid outlet 120 flows into the first intermediate distribution pipe section 112 through a set of parallel pipe groups. The fluid in the first intermediate distribution pipe section 112 then flows into the second intermediate distribution pipe section 113 through a set of parallel pipe groups. The fluid in the second intermediate distribution pipe section 113 then flows into the third intermediate distribution pipe section 114 through a set of parallel pipe groups. The fluid in the third intermediate distribution pipe section 114 then flows into the fourth intermediate distribution pipe section 115 through a set of parallel pipe groups. Finally, it flows into the outlet distribution pipe section 116 through a set of parallel pipe groups and then flows out from the fluid outlet 120.

[0050] It is understandable that there are various ways to arrange the heat collection branch pipe 3, and there are also various ways for the fluid to flow in the heat collection branch pipe 3 and the main frame 1, which are not limited here.

[0051] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "square-shaped structure" and the like is based on the orientation or positional relationship shown in the accompanying drawings, which is only for facilitating the description of the present utility model and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation or is constructed and operated in a specific orientation, therefore it should not be construed as a limitation on the present utility model.

[0052] In the description of the embodiments of the present utility model, unless otherwise explicitly specified and defined, the terms "connection", "direct connection", "indirect connection", "fixed connection", "mounting", "assembling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integrated connection; the terms "mounting", "connection", "fixed connection" may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] Although the embodiments disclosed by the present utility model are as described above, the content described is only the embodiments adopted for facilitating understanding of the present utility model, and is not intended to limit the present utility model. Any person skilled in the art that the present utility model belongs to may make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed by the present utility model. However, the scope of patent protection of the present utility model shall still be defined by the appended claims.

Claims

1. A frame for a solar collector, characterized in that, The solar collector includes a photovoltaic panel and multiple heat collection branches located on the back side of the photovoltaic panel; The frame includes a main frame, which includes a tube with an internal flow channel and an installation structure disposed on the tube. The installation structure is configured to install the edge of the photovoltaic panel and the end of the heat collection branch pipe, and enables the heat collection branch pipe to communicate with the internal flow channel.

2. The frame according to claim 1, characterized in that, The mounting structure includes a first main clamping plate and a second main clamping plate fixed on the pipe body, and an insertion hole provided on the pipe body that communicates with the internal flow channel. The insertion hole is located between the first main clamping plate and the second main clamping plate. The space between the first main clamping plate and the second main clamping plate is for the photovoltaic panel and the heat collection branch pipe to be inserted and installed, and the insertion hole is for the end of the heat collection branch pipe to be inserted.

3. The frame according to claim 2, characterized in that, The side of the tube facing the photovoltaic panel is formed as a mounting plane, and the first main clamping plate, the second main clamping plate and the insertion hole are disposed on the mounting plane.

4. The frame according to claim 2, characterized in that, The first main clamping plate is disposed on the back of the photovoltaic panel, and the second main clamping plate is disposed on the front of the photovoltaic panel. The width of the second main clamping plate is smaller than the width of the first main clamping plate.

5. The frame according to claim 1, characterized in that, The main frame also includes a bent plate that is connected to the tube and bent toward the back side of the photovoltaic panel. The bent plate is configured to be mounted on a predetermined structure for mounting a solar collector with the frame via the bent plate.

6. The frame according to claim 5, characterized in that, The bent plate is provided with mounting holes, which are configured to fix the bent plate to the predetermined structure by fasteners.

7. The frame according to claim 2, characterized in that, The frame includes two main frames and auxiliary frames respectively connected to both ends of the main frames. The two main frames are installed on opposite sides of the photovoltaic panel, and the two auxiliary frames are installed on the other two sides of the photovoltaic panel.

8. The frame according to claim 7, characterized in that, The auxiliary frame includes a first auxiliary clamping plate, a second auxiliary clamping plate, and a side plate connecting the first auxiliary clamping plate and the second auxiliary clamping plate. The first auxiliary clamping plate, the second auxiliary clamping plate, and the side plate form a receiving groove to accommodate the side of the photovoltaic panel.

9. The frame according to claim 8, characterized in that, The first auxiliary clamping plate is disposed on the back of the photovoltaic panel, and the second auxiliary clamping plate is disposed on the front of the photovoltaic panel. The width and thickness of the first auxiliary clamping plate are the same as those of the first main clamping plate, and the width and thickness of the second auxiliary clamping plate are the same as those of the second main clamping plate.

10. The frame according to any one of claims 1-9, characterized in that, The main frame is provided with a fluid inlet and / or a fluid outlet; The fluid inlet and / or the fluid outlet are provided on the end face of the pipe body, or the fluid inlet and / or the fluid outlet are provided on the side wall of the pipe body.

11. A solar collector, characterized in that, It includes a photovoltaic panel, a plurality of heat collection branches located on the back side of the photovoltaic panel, and a frame according to any one of claims 1-10, wherein the photovoltaic panel and the plurality of heat collection branches are all mounted on the frame.

12. The solar collector according to claim 11, characterized in that, The cross-section of the heat collection branch pipe is flat.

13. The solar collector according to claim 11 or 12, characterized in that, Each of the heat collection branch pipes includes a pipe body and bending joints installed on the frame at both ends of the pipe body. The bending joints are configured to bend away from the photovoltaic panel so that the pipe body is in contact with the photovoltaic panel.

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