Anti-overheating stress sealed connection structure and photovoltaic and photo-thermal integrated device

Abstract

The application provides an anti-overheating stress sealing connection structure and a photovoltaic and photo-thermal integrated device, and relates to the technical field of photovoltaic and photo-thermal technology.The anti-overheating stress sealing connection structure comprises an upper flow channel, a lower flow channel, an upper shunt pipeline and a lower shunt pipeline; the upper flow channel is provided with the upper shunt pipeline, the upper shunt pipeline is fixedly connected with the upper flow channel; the lower flow channel is provided with the lower shunt pipeline; the lower shunt pipeline is sealingly and movably connected with the lower flow channel; the upper shunt pipeline and the lower shunt pipeline are connected with the photovoltaic and photo-thermal integrated pipeline; and the two ends of the upper flow channel and the lower flow channel are respectively connected with the anti-overheating stress sealing connection structure. The photovoltaic and photo-thermal integrated device of the application can absorb the installation stress and thermal expansion stress between the photovoltaic and photo-thermal integrated pipeline and the upper flow channel and the lower flow channel through the anti-overheating stress sealing connection structure, and prevent the device from being cracked or torn under the action of stress.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic and photothermal technology, and in particular to an anti-overheating stress sealing connection structure and an integrated photovoltaic and photothermal device. Background Technology

[0002] A photovoltaic-thermal integrated system mainly consists of two parts: photovoltaic and solar thermal. The photovoltaic part uses technologically mature solar photovoltaic panels and provides the building with the necessary electricity through a control system. It mainly includes photovoltaic cells, batteries, inverters, and controllers. The solar thermal part is mainly a collector that converts solar energy into heat energy. At the same time, it uses a thermal cycle mechanism to cool the solar cells, improve the photoelectric conversion efficiency, and utilize solar thermal energy more efficiently.

[0003] Currently, most photovoltaic-thermal integrated devices on the market use threaded connections and sealant to connect the pipes between modules and between modules. During long-term use, the thermal expansion stress of the equipment cannot be released, which often leads to the pipes tearing and causing water leakage. At the same time, when there are water or power outages, the heat on the solar photovoltaic cells cannot be released, causing the temperature to rise and posing a risk of explosion. Summary of the Invention

[0004] To overcome the aforementioned problems in the prior art, the present invention provides an overheat-resistant stress-sealed connection structure and a photovoltaic-thermal integrated device.

[0005] The present invention provides a heat-resistant stress-sealing connection structure, including a first pipe head, a second pipe head, and a sealing ring; the first pipe head is provided with a first concave ring, and the second pipe head is provided with a second concave ring.

[0006] The first pipe head is inserted into the second pipe head, and a sealing ring is provided between the first and second pipe heads axially; a gap is left between the first and second pipe heads radially, and the first and second concave rings are aligned; the sealing ring is installed in the space formed by the first and second concave rings; the sealing ring is in close contact with the first and second concave rings. The sealing ring absorbs the thermal expansion stress between the pipes.

[0007] Preferably, the number of the first concave ring, the second concave ring, and the sealing ring is the same, that is, one or more, and the first concave ring, the second concave ring, and the sealing ring correspond one-to-one.

[0008] Preferably, the sealing ring is made of a high-temperature resistant non-metallic elastic material.

[0009] Another aspect of the present invention provides a photovoltaic-thermal integrated tube, including any of the above-described anti-overheating stress sealing connection structures, and further including a glass tube, a heat exchange tube, a heat-conducting backplate, a heat-conducting diagonal brace, a photovoltaic cell, a sealant, a sealant baffle, and a sealant retaining ring;

[0010] The heat exchange tube is located inside the glass tube, and each end of the heat exchange tube is connected to an anti-overheating stress sealing connection structure; the center line of the heat exchange tube is parallel to the center line of the glass tube; the center of the heat exchange tube cross-section does not coincide with the center of the glass tube cross-section; the upper surface of the heat exchange tube cross-section is tangent to the horizontal diameter line of the glass tube cross-section.

[0011] The thermally conductive backplate is located at the horizontal diameter line of the glass tube cross-section and is tangentially connected to the heat exchange tube; a thermally conductive diagonal brace is provided between the thermally conductive backplate and the heat exchange tube; both ends of the thermally conductive backplate are bent downwards; the photovoltaic cell is attached to the top of the thermally conductive backplate.

[0012] Both ends of the glass tube are respectively provided with a sealant baffle and a sealant retaining ring; the sealant baffle is located inside the glass tube and is welded to the sealant retaining ring; the sealant retaining ring is concentric with the cross-section of the glass tube; the outer end of the sealant retaining ring is flush with the outer end of the glass tube; the space formed by the glass tube, the sealant baffle, and the sealant retaining ring is filled with sealant; a hole is drilled in the middle of the sealant baffle; the heat exchange tube passes through the hole and is connected to the anti-overheating stress sealing connection structure; the heat exchange tube is welded to the sealant baffle.

[0013] Preferably, a gap of 1-2 mm is left between the sealant baffle and the glass tube to prevent the glass tube from being damaged due to thermal expansion.

[0014] Preferably, the space formed by the glass tube and the sealant baffle is evacuated.

[0015] The present invention also provides a photovoltaic-thermal integrated device, including any of the aforementioned overheat stress-resistant sealing connection structures and any of the aforementioned photovoltaic-thermal integrated tubes, and further including an upper flow channel, a lower flow channel, an upper branch pipe, and a lower branch pipe;

[0016] The upper flow channel is provided with the upper branch pipe, and the upper branch pipe is fixedly connected to the upper flow channel; the lower flow channel is provided with the lower branch pipe; the lower branch pipe and the lower flow channel are sealed and movably connected; the photovoltaic-thermal integrated tube is connected between the upper branch pipe and the lower branch pipe;

[0017] The upper and lower flow channels are respectively connected to the anti-overheating stress sealing connection structure at both ends.

[0018] Preferably, a side float valve is provided on the side of the upper flow channel and / or the lower flow channel.

[0019] Preferably, the upper flow channel is provided with 2 to 10 sets of upper diversion pipes; the lower flow channel is provided with 2 to 10 sets of lower diversion pipes; the upper diversion pipes and the lower diversion pipes correspond one to one, and the photovoltaic-thermal integrated tube is connected in the middle.

[0020] Preferably, it also includes multi-layer insulation for the flow channel;

[0021] The multi-layer insulation of the flow channel covers all areas except for the photovoltaic-thermal integrated tube;

[0022] The multi-layer insulation of the flow channel includes, from the inside out, an aerogel layer, a magnesium silicate layer, and a polyurethane layer.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] (1) The photovoltaic-thermal integrated device of the present invention absorbs the installation stress and thermal expansion stress between the photovoltaic-thermal integrated tube and the upper and lower flow channels through the anti-overheating stress sealing connection structure, thereby preventing the equipment from cracking or tearing under stress.

[0025] (2) The present invention also connects multiple photovoltaic and photothermal integrated devices through an anti-overheating stress sealing connection structure, which absorbs the stress between modules and allows for rapid installation between devices, thus accelerating the project progress.

[0026] (3) Side float valves are installed on the sides of the upper and lower flow channels. After water or power is cut off for any reason, the water in the pipe evaporates or leaks, and the float valves of the air inlet valve and the air outlet valve open. The temperature inside the photovoltaic-thermal integrated tube rises, and air enters. By utilizing the principle of hot air rising, air circulation is carried out to reduce the temperature inside the photovoltaic-thermal integrated tube and improve the safety of the device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the photovoltaic-thermal integrated device of the present invention;

[0028] Figure 2 This is a front view of the photovoltaic-thermal integrated device of the present invention;

[0029] Figure 3 This is a schematic diagram of the photovoltaic-thermal integrated tube structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the cross-section of the photovoltaic-thermal integrated tube of the present invention;

[0031] Figure 5 This is a schematic diagram of the multi-layer thermal insulation structure of the flow channel of the present invention.

[0032] In the diagram: 1. Upper flow channel;

[0033] 1-1. Upper branch pipe;

[0034] 2. Downstream channel;

[0035] 2-1. Lower branch pipe;

[0036] 3. Overheat-resistant stress-sealed connection structure;

[0037] 3-1, First pipe head;

[0038] 3-2, Second pipe head;

[0039] 3-3. Sealing ring;

[0040] 3-4. Sealing ring;

[0041] 4. Photovoltaic-thermal integrated tube;

[0042] 4-1. Glass tube;

[0043] 4-2. Heat exchange tubes;

[0044] 4-3. Thermally conductive backplate;

[0045] 4-4. Thermally conductive diagonal brace;

[0046] 4-5. Photovoltaic cells;

[0047] 4-6. Sealant;

[0048] 4-7. Sealant baffle;

[0049] 4-8 Sealing ring;

[0050] 5. Side float valve;

[0051] 6. Multi-layer insulation of the flow channel;

[0052] 6-1 Aerogel layer;

[0053] 6-2, Magnesium silicate layer;

[0054] 6-3 Polyurethane layer. Detailed Implementation

[0055] The present 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 only for explaining the present invention and are not intended to limit the present invention.

[0056] Example 1

[0057] like Figure 2As shown, this preferred embodiment provides an anti-overheating stress sealing connection structure 3, including a first pipe head 3-1, a second pipe head 3-2, and a sealing ring 3-3; the first pipe head 3-1 is provided with a first concave ring, and the second pipe head 3-2 is provided with a second concave ring;

[0058] The first pipe end 3-1 is inserted into the second pipe end 3-2. A sealing ring 3-4 is axially positioned between the first pipe end 3-1 and the second pipe end 3-2. A radial gap is left between the first pipe end 3-1 and the second pipe end 3-2 to allow for stress expansion. The first and second concave rings are aligned. A sealing ring 3-3 is installed in the space formed by the first and second concave rings. The sealing ring 3-3 is in close contact with the first and second concave rings. The sealing ring 3-3 absorbs the installation stress and thermal expansion stress between the pipes.

[0059] The number of the first concave ring, the second concave ring, and the sealing ring 3-3 is the same, which can be one or more, and the first concave ring, the second concave ring, and the sealing ring 3-3 correspond one-to-one; in this preferred embodiment, the number of the first concave ring, the second concave ring, and the sealing ring 3-3 is 3, which increases the stability of the connection while maintaining the sealing performance.

[0060] In this preferred embodiment, the sealing ring 3-3 is made of a high-temperature resistant non-metallic elastic material.

[0061] Example 2

[0062] like Figures 1-4 As shown, another aspect of the present invention provides a photovoltaic-thermal integrated tube 4, including the overheat stress-resistant sealing connection structure 3 in Embodiment 1, and also including a glass tube 4-1, a heat exchange tube 4-2, a heat-conducting back plate 4-3, a heat-conducting diagonal brace 4-4, a photovoltaic cell 4-5, a sealant 4-6, a sealant baffle 4-7, and a sealant retaining ring 4-8.

[0063] Heat exchange tube 4-2 is located inside the glass tube. Both ends of heat exchange tube 4-2 are connected to an anti-overheating stress sealing connection structure 3. The center line of heat exchange tube 4-2 is parallel to the center line of glass tube 4-1. The center of the cross-section of heat exchange tube 4-2 does not coincide with the center of the cross-section of glass tube 4-1. The upper surface of the cross-section of heat exchange tube 4-2 is tangent to the horizontal diameter line of the cross-section of glass tube 4-1.

[0064] The thermally conductive backplate 4-3 is located at the horizontal diameter line of the glass tube 4-1 and is tangentially connected to the heat exchange tube 4-2. This ensures that the thermally conductive backplate 4-3 has the largest possible area inside the glass tube 4-1. A thermally conductive brace 4-4 is provided between the thermally conductive backplate 4-3 and the heat exchange tube 4-2. This increases the stability of the thermally conductive backplate 4-3 and accelerates the transfer of heat between the thermally conductive backplate 4-3 and the heat exchange tube 4-2, cooling the solar cell 4-5, improving the photoelectric conversion efficiency, and utilizing solar thermal energy more efficiently. The heat-conducting backplate 4-3 is bent downwards at both ends. This serves two purposes: first, it reduces the impact of the heat-conducting backplate 4-3 on the glass tube 4-1 during installation; second, it guides the direction of thermal expansion stress after the heat-conducting backplate 4-3 is heated, reducing the impact on the photovoltaic cells 4-5 on top of the heat-conducting backplate 4-3. The photovoltaic cells 4-5 are attached to the heat-conducting backplate 4-3. The photovoltaic cells 4-5 use mature solar photovoltaic panels and provide the building with the required electrical energy through a control system. They mainly include components such as photovoltaic cells, batteries, inverters, and controllers.

[0065] Both ends of the glass tube 4-1 are respectively provided with a sealant baffle 4-7 and a sealant retaining ring 4-8; the sealant baffle 4-7 is located inside the glass tube 4-1 and is welded to the sealant retaining ring 4-8; the sealant retaining ring 4-8 is concentric with the cross section of the glass tube 4-1; the outer end of the sealant retaining ring 4-8 is flush with the outer end of the glass tube 4-1; the space formed by the glass tube 4-1, the sealant baffle 4-7, and the sealant retaining ring 4-8 is filled with sealant 4-6; a hole is drilled in the middle of the sealant baffle 4-7; the heat exchange tube 4-2 passes through the hole and is connected to the anti-overheating stress sealing connection structure 3; the heat exchange tube 4-2 is welded to the sealant baffle 4-7.

[0066] In this embodiment, a gap of 1-2 mm is left between the sealant baffle 4-7 and the glass tube 4-1 to prevent the glass tube 4-1 from being damaged due to thermal expansion.

[0067] In this embodiment, the space formed by the glass tube and the sealant baffle is evacuated.

[0068] Example 3

[0069] like Figures 1-5 As shown, the present invention also provides a photovoltaic-thermal integrated device, including the overheat-resistant stress-sealed connection structure 3 in Embodiment 1 and the photovoltaic-thermal integrated tube 4 in Embodiment 2, and also includes an upper flow channel 1, a lower flow channel 2, an upper branch pipe 1-1, and a lower branch pipe 2-1;

[0070] The upper flow channel 1 is provided with an upper branch pipe 1-1, which is fixedly connected to the upper flow channel 1; the lower flow channel 2 is provided with a lower branch pipe 2-1; the lower branch pipe 2-1 and the lower flow channel 2 are sealed and movably connected; a photovoltaic-thermal integrated pipe 4 is connected between the upper branch pipe 1-1 and the lower branch pipe 2-1.

[0071] Both ends of the upper flow channel 1 and the lower flow channel 2 are respectively connected to an anti-overheating stress sealing connection structure 3.

[0072] In this embodiment, side float valves 5 are provided on the sides of the upper flow channel 1 and the lower flow channel 2. After water or power outages, the water in the pipe evaporates or leaks, and the float valves of the air inlet and outlet valves open, the temperature inside the photovoltaic-thermal integrated tube 4 rises, and air enters. Utilizing the principle of rising hot air, air circulation is achieved, reducing the temperature inside the photovoltaic-thermal integrated tube 4 and improving the safety of the device.

[0073] The upper flow channel 1 is provided with 2 to 10 sets of upper diversion pipes 1-1; the lower flow channel 2 is provided with 2 to 10 sets of lower diversion pipes 2-1; the upper diversion pipes 1-1 and the lower diversion pipes 2-1 correspond one-to-one, and are connected in the middle by a photovoltaic-thermal integrated tube 4. In this embodiment, the above-mentioned components are provided in 3 sets.

[0074] In this embodiment, the multi-layer insulation 6 of the flow channel is also included; the multi-layer insulation 6 of the flow channel covers all positions except for the photovoltaic-thermal integrated tube 4; the multi-layer insulation 6 of the flow channel includes an aerogel layer 6-1, a magnesium silicate layer 6-2 and a polyurethane layer 6-3 from the inside to the outside.

[0075] The photovoltaic-thermal integrated device of the present invention absorbs the installation stress and thermal expansion stress between the photovoltaic-thermal integrated tube and the upper and lower flow channels through an anti-overheating stress sealing connection structure, preventing the equipment from cracking or tearing under stress. The present invention also connects multiple photovoltaic-thermal integrated devices through an anti-overheating stress sealing connection structure, which absorbs the stress between modules and allows for rapid installation between devices, accelerating the project progress.

[0076] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw-in," and "pad" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A photovoltaic-thermal integrated tube, comprising two overheat-resistant stress-sealed connection structures, characterized in that, It also includes glass tubes, heat exchange tubes, heat-conducting backplates, heat-conducting braces, photovoltaic cells, sealant, sealant baffles, and sealant retaining rings; The anti-overheating stress sealing connection structure includes a first pipe head, a second pipe head, a sealing ring, and a sealing ring; the first pipe head is provided with a first concave ring, and the second pipe head is provided with a second concave ring; The first pipe head is inserted into the second pipe head, and a sealing ring is provided between the first and second pipe heads axially. A gap is left radially between the first and second pipe heads as a stress expansion space, and the first and second concave rings are aligned. The sealing ring is installed in the space formed by the first and second concave rings. The sealing ring is in close contact with the first and second concave rings. The sealing ring is made of a high-temperature resistant non-metallic elastic material, which absorbs the installation stress and thermal expansion stress between the pipes. The number of the first and second concave rings and the sealing ring is the same, and there are multiple of them. The first and second concave rings and the sealing ring correspond one-to-one, which increases the stability of the connection while maintaining the sealing performance. The heat exchange tube is located inside the glass tube, and each end of the heat exchange tube is connected to an anti-overheating stress sealing connection structure; the center line of the heat exchange tube is parallel to the center line of the glass tube; the center of the heat exchange tube cross-section does not coincide with the center of the glass tube cross-section; the upper surface of the heat exchange tube cross-section is tangent to the horizontal diameter line of the glass tube cross-section. The thermally conductive backplate is located at the horizontal diameter line of the glass tube cross-section and is tangentially connected to the heat exchange tube; a thermally conductive diagonal brace is provided between the thermally conductive backplate and the heat exchange tube; both ends of the thermally conductive backplate are bent downwards to reduce the impact of the thermally conductive backplate on the glass tube during installation and to guide the direction of thermal expansion stress after the thermally conductive backplate is heated, thereby reducing the impact on the photovoltaic cells on the top surface of the thermally conductive backplate; the photovoltaic cells are attached to the top of the thermally conductive backplate; Both ends of the glass tube are respectively provided with a sealant baffle and a sealant retaining ring; the sealant baffle is located inside the glass tube and is welded to the sealant retaining ring; the sealant retaining ring is concentric with the cross-section of the glass tube; the outer end of the sealant retaining ring is flush with the outer end of the glass tube; the space formed by the glass tube, the sealant baffle, and the sealant retaining ring is filled with sealant; a hole is drilled in the middle of the sealant baffle; the heat exchange tube passes through the hole and is connected to the anti-overheating stress sealing connection structure; the heat exchange tube is welded to the sealant baffle; a gap of 1-2 mm is left between the sealant baffle and the glass tube to prevent the glass tube from being damaged due to thermal expansion; the space formed by the glass tube and the sealant baffle is evacuated.

2. A photovoltaic-thermal integrated device, comprising the photovoltaic-thermal integrated tube as described in claim 1, characterized in that, It also includes the upper flow channel, lower flow channel, upper branch pipe, and lower branch pipe; The upper flow channel is provided with the upper branch pipe, and the upper branch pipe is fixedly connected to the upper flow channel; the lower flow channel is provided with the lower branch pipe; the lower branch pipe and the lower flow channel are sealed and movably connected; the photovoltaic-thermal integrated tube is connected between the upper branch pipe and the lower branch pipe; The upper and lower flow channels are respectively connected to the anti-overheating stress sealing connection structure at both ends.

3. The photovoltaic-thermal integrated device according to claim 2, characterized in that, The upper flow channel and / or the lower flow channel are provided with side float valves.

4. The photovoltaic-thermal integrated device according to claim 2, characterized in that, The upper flow channel is provided with 2 to 10 sets of upper diversion pipes; the lower flow channel is provided with 2 to 10 sets of lower diversion pipes; the upper diversion pipes and the lower diversion pipes correspond one to one, and the photovoltaic-thermal integrated tube is connected in the middle.

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