Hot air pipe and film coating equipment

Abstract

The utility model provides a hot air pipe and film covering equipment, and relates to the technical field of photovoltaic module manufacturing equipment. The hot air pipe comprises an air pipe body, an end cover and an air nozzle, the end cover and the air nozzle are installed at the two ends of the air pipe body respectively, a heating assembly and a temperature measuring assembly are arranged in the air pipe body, the heating assembly comprises a plurality of frameworks, a heating wire and a holder, and constraint structures are arranged on the frameworks; the heating wire is wound on the peripheral side of the framework and is in limiting fit with the constraint structure; the retainers are arranged at the two ends of the frameworks and used for erecting the frameworks and restraining the frameworks in an air duct of the air pipe body. The film laminating equipment comprises a plurality of hot air pipes. The multiple frameworks clamped by the retainers are restrained through the heating wires, mutual overlapping of the heating wires is avoided, the service life of the heating wires is prolonged, a new air channel with a stable structure is formed in the air pipe body, the thermal conversion efficiency is improved, airflow with stable temperature is output, and the melting and pasting quality of film strips is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component manufacturing equipment, in particular to a hot air pipe and film coating equipment. Background Art

[0002] During photovoltaic module manufacturing, film strips are applied to the gaps between cell strings to improve the yield rate during the lamination process and enhance the appearance of the module. During actual module processing, these film strips must be secured to the photovoltaic glass panels or between cell strings. Due to the heating and bonding properties of the film strips, non-contact bonding effectively prevents adhesion between the heating element and the film strips, while ensuring dimensional accuracy during film attachment. Using hot air duct heating is one option for non-contact bonding.

[0003] The heating wire in a traditional hot air duct is a self-coiling structure (spring structure) that winds along a spiral path on a high-temperature resistant frame. Common structures include ventilation and protective structures. In the ventilation structure, the frame is a vertical plate-like support structure, which has good ventilation performance. However, the self-coiling heating wire is easily deformed and loosened when heated, and the heating wires overlap and melt. In the protective structure, the frame is a three-dimensional spiral support structure, and the self-coiling heating wire is placed in a spiral groove. Although this can prevent the heating wires from overlapping, the ventilation effect is poor, the heat conversion rate is low, and the heating wire is prone to local overheating and melting.

[0004] However, the photovoltaic module coating equipment needs to perform coating work continuously. The heating wire of the hot air pipe structure in the prior art has a short service life and is not suitable for use under high-frequency assembly line processing conditions. Utility Model Content

[0005] The utility model provides a hot air pipe with a long service life and stable working temperature, and a coating device with the hot air pipe, which is used in the coating process of photovoltaic modules, improves the yield rate of modules in the lamination process stage, and improves the appearance of modules.

[0006] The technical solution adopted by the present invention is: a hot air duct, including an air duct main body, and end covers and air nozzles respectively installed at both ends of the air duct main body, a heating component and a temperature measuring component are provided in the air duct main body, the heating component includes a plurality of frames, heating wires, and a retaining frame, and a constraint structure is provided on the frame; the heating wire is rotated around the circumference of the frame and is limitedly matched with the constraint structure; the retaining frame is arranged at both ends of the frame, and is used to upright each of the frames and constrain them in the air duct of the air duct main body.

[0007] Preferably, the temperature measuring component includes a thermocouple and a guard rod, and the end of the guard rod is provided with a cavity for accommodating the thermocouple temperature measuring part, and the end is arranged close to the air outlet end of the air duct body.

[0008] Preferably, the retaining frame is integrally formed of a plurality of support rods in a divergent shape, and the support rods are positionally matched with the frame.

[0009] Preferably, the constraint structure is a spiral guide groove, and the depth of the guide groove is smaller than the radius of the heating wire.

[0010] Preferably, there is one heating wire, which is wound around the outside of each of the skeletons in sequence.

[0011] Preferably, an insulating sleeve is provided in the air duct body, and the heating component is provided in the insulating sleeve.

[0012] Furthermore, the insulating sleeve includes an upper sleeve and a lower sleeve, the inner diameter of the upper sleeve is smaller than the inner diameter of the lower sleeve, and the upper sleeve is used to constrain the heating component in the lower sleeve.

[0013] Preferably, the end cover includes a cover plate and an annular pressure cover, and the annular pressure cover is used to press the cover plate against the upper end surface of the air duct body.

[0014] Preferably, an air amplifier is installed on the air inlet of the end cover.

[0015] The utility model also provides a film coating device, comprising a plurality of hot air pipes as described above.

[0016] The utility model adopts the above technical solution to achieve the following beneficial effects:

[0017] By setting up multiple independent skeletons, the heating wire rotates around the skeleton based on the constraint structure. When the heating wire is deformed during work, the constraint structure on the skeleton can limit the heating wire, ensuring that the heating wire can still rotate around the corresponding position of the skeleton even after deformation and loosening, avoiding overlapping of the heating wires, thereby avoiding damage to the heating wires and extending the service life of the heating wires; at the same time, the retaining frame is clamped at both ends of the skeleton to constrain and fix the skeleton, so that each skeleton is uniform, orderly and upright in the air duct of the air duct main body, forming a new air duct with stable structure. In this way, when the gas passes through the new air duct, it can effectively improve the heat conversion efficiency and output airflow with stable temperature, thereby improving the melting quality of the membrane strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the first hot air duct structure solution of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure of the first hot air duct structure solution of this application;

[0020] Figure 3 for Figure 2 Enlarged view of part a in the middle;

[0021] Figure 4 This is a structural diagram of the temperature measurement component in the first hot air pipe structural solution of this application;

[0022] Figure 5 This is a schematic diagram of the connection structure between a retainer and a frame in this application;

[0023] Figure 6 This is a schematic diagram of the structure of a frame and heating wire separated in this application;

[0024] Figure 7 This is a schematic diagram of the internal structure of the second hot air duct structure solution of this application;

[0025] Figure 8 This is a schematic diagram of the internal structure of the third hot air duct structure solution of this application;

[0026] Figure 9 This is a schematic diagram of the exploded structure of an end cover solution in this application.

[0027] exist Figures 1-9 middle,

[0028] 100, air duct body; 210, skeleton; 211a, guide groove; 212, limiting hole; 220, heating wire; 230, retaining frame; 231, support rod; 232, limiting rod; 300, insulating sleeve; 310, upper sleeve; 320, lower sleeve; 400, end cover; 410, cover plate; 420, annular pressure cover; 430, air inlet connector; 440, terminal block; 450, air amplifier; 500, temperature measuring component; 510, thermocouple; 520, guard rod; 600, air nozzle. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0030] During photovoltaic module manufacturing, the film strips must be fixed to the photovoltaic glass panels or between the cell strings to improve the yield rate during the lamination process and enhance the appearance of the module. Using a hot air duct for non-contact lamination can meet these requirements. However, the heating wire 220 in traditional hot air duct structures has a short service life and is unsuitable for high-frequency production line processing. Furthermore, the temperature output is unstable, resulting in inconsistent lamination quality and directly impacting the subsequent lamination process of the photovoltaic module.

[0031] The utility model provides a hot air pipe, such as Figures 1-6 As shown, the hot air duct includes a duct body 100, and end covers 400 and air nozzles 600 respectively installed at both ends of the duct body 100. A heating component and a temperature measuring component 500 are provided in the duct body 100. The heating component includes a plurality of skeletons 210, heating wires 220, and a retaining frame 230. A constraint structure is provided on the skeleton 210; the heating wires 220 rotate around the sides of the skeleton 210 and cooperate with the constraint structure; the retaining frame 230 is clamped at both ends of the skeleton 210, and is used to upright each skeleton 210 and constrain it in the air duct of the duct body 100.

[0032] When in use, the hot air duct heats the gas introduced through the cooperation of the external gas, the heating component, and the temperature measuring component 500, and blows out a high-temperature airflow with a stable temperature from the air nozzle 600, thereby heating and fusing the film strip. The heating wire 220 rotates around the side of the frame 210 based on the constraint structure. When the heating wire 220 deforms during operation, the constraint structure can play a role in limiting the heating wire 220, ensuring that the heating wire 220 still rotates around the corresponding position of the frame 210 even after deformation and loosening, thereby preventing the heating wire 220 from overlapping and thus preventing damage to the heating wire 220 and extending the service life of the heating wire 220. At the same time, the retaining frame 230 is clamped at both ends of the frame 210, constraining and fixing the frame 210 so that each frame 210 stands upright in the air duct of the air duct body 100, forming a new air duct with a stable structure. In this way, when the gas passes through the new air duct, it can effectively improve the heat conversion efficiency and output a stable airflow, thereby improving the fusing quality of the film strip. Of course, by arranging the skeletons 210 evenly and orderly in the air duct, a better effect can be achieved.

[0033] Based on the problem in the prior art that the temperature measuring end of the thermocouple 510 is easily connected to the heating wire 220, such as Figure 4 As shown, in the present application, the temperature measurement assembly 500 includes a thermocouple 510 and a protective rod 520. The end of the protective rod 520 is provided with a concave cavity for accommodating the temperature measurement portion of the thermocouple 510, and the end is arranged near the air outlet end of the air duct body 100. The protective rod 520 protects the thermocouple 510 and ensures that the thermocouple 510 can stably perform temperature measurement. In actual use, the protective rod 520 is made of a high-temperature resistant material, such as corundum, and one end is fixed to the end cap 400. The temperature measurement portion of the thermocouple 510 is set in the concave cavity and partially protrudes from the concave cavity. At the same time, two independent wiring channels are formed in the protective rod 520, each for the thermocouple 510 wire to pass through. In this way, the protective rod 520 supports and protects the thermocouple 510. When the hot air duct is in operation, on the one hand, it can ensure that the thermocouple 510 does not swing arbitrarily with the air flow, and on the other hand, it can ensure that the temperature measurement portion of the thermocouple 510 does not overlap with the heating wire 220.

[0034] In a preferred embodiment of the present application, Figure 5 As shown, the retainer 230 is formed integrally from a plurality of support rods 231 in a diverging shape. Each support rod 231 is provided with a limiting rod 232, and both ends of the frame 210 are provided with limiting holes 212 that match the limiting rods 232. Through the cooperation of the limiting rods 232 and the limiting holes 212, the retainer 230 effectively constrains each frame 210, ensuring that each frame 210 does not move arbitrarily during operation, which facilitates the formation of stable airflow within the air duct. Furthermore, the retainer 230, formed integrally from the diverging support rods 231, provides sufficient space for air to pass through.

[0035] Of course, a flow-guiding structure can also be provided on the support rod 231 to reduce the generation of gas convection. In other embodiments, the limiting holes 212 can also be provided on the support rod 231, and the limiting rods 232 can be provided at both ends of the skeleton 210 (not shown in the figure). This application does not specifically limit the specific clamping connection method between the retaining frame 230 and the skeleton 210; it only needs to be able to limit the skeleton 210.

[0036] In a preferred embodiment of the present application, Figure 5-Figure 6 As shown, the restraining structure is a spiral guide groove 211a, the depth of which is less than the radius of the heating wire 220. During installation, the heating wire 220 rotates along the guide groove 211a. Because the depth of the guide groove 211a is less than the radius of the heating wire 220, a small portion of the heating wire 220 is embedded in the guide groove 211a. This prevents the heating wire 220 from disengaging from the guide groove 211a during operation and expansion, effectively preventing the heating wire 220 from moving. At the same time, the majority of the heating wire 220 protrudes from the axial surface of the frame 210, effectively improving heat conversion efficiency.

[0037] Of course, the constraint structure can also be a spirally arranged protrusion (not shown in the figure, such as a plurality of orderly arranged convex point structures or other protrusion structures). The heating wire 220 rotates on a spiral channel composed of a plurality of protrusions on the axial surface of the skeleton 210. In this case, the protrusions play a restraining role on the heating wire 220, which can effectively prevent the heating wire 220 from moving; at the same time, the heating wire 220 completely protrudes from the axial surface of the skeleton 210, which can effectively improve the heat conversion efficiency.

[0038] In a preferred embodiment of the present application, there is one heating wire 220, and it is wound around the outside of each skeleton 210 in sequence. Here, winding around the outside of each skeleton 210 in sequence means that, if the skeleton 210 is set vertically, the heating wire 220 is wound from top to bottom from one end of the first skeleton 210, and then directly connected from the bottom of the first skeleton 210 to the bottom of the second skeleton 210, and then wound around the second skeleton 210 from bottom to top, and so on. It can be wound around other skeletons 210 in sequence. By winding a single heating wire 220, the heating effect can be guaranteed to be the same everywhere, which is conducive to forming a stable high-temperature airflow. Of course, in this case, the number of skeletons 210 is preferably an even number.

[0039] In another embodiment of the present application (not shown in the figure), there are multiple heating wires 220, and the skeletons 210 are divided into multiple groups accordingly. Each group is provided with an even number of skeletons 210 and independently winds a heating wire 220. For example, if eight skeletons 210 are installed, the heating wires 220 can be set to four or two. In this way, after a heating wire 220 breaks, the hot air pipe will not immediately lose its heating function.

[0040] In a preferred embodiment of the present application, Figure 7 As shown, an insulating sleeve 300 is provided in the air duct main body 100, and the heating component is provided in the insulating sleeve 300. In this embodiment, the insulating sleeve 300 is a quartz tube, and the heating component is provided inside the quartz tube to ensure that the heating wire 220 does not contact the air duct main body 100, thereby avoiding short circuit and leakage accidents. The insulating sleeve 300 can also be made of other insulating materials, which is not specifically limited in this application. Of course, the insulating sleeve 300 can be an independent one. In this case, an abutment ring is provided on the end cover 400, that is, after the end cover 400 is installed, the abutment ring on the end cover 400 is provided in the inner ring of the insulating sleeve 300 and abuts on the retaining frame 230, thereby fixing the heating component as a whole.

[0041] In another embodiment, Figure 8 As shown, the insulating sleeve 300 comprises two parts: an upper sleeve 310 and a lower sleeve 320. The inner diameter of the upper sleeve 310 is smaller than that of the lower sleeve 320, and the upper sleeve 310 is used to constrain the heating assembly within the lower sleeve 320. Specifically, the heating assembly is entirely mounted within the lower sleeve 320, with the upper sleeve 310 positioned above the lower sleeve 320. Because its inner diameter is smaller than that of the lower sleeve 320, the bottom surface of the lower sleeve 320 can simultaneously abut against a retaining bracket 230 on the heating assembly, thereby securing the entire heating assembly and preventing it from shaking during operation. Furthermore, the wiring within the upper sleeve 310 is prevented from short-circuiting with the duct body 100. Alternatively, a retaining groove (not shown) can be provided on the surface of the upper sleeve 310 facing the lower sleeve 320. The retaining groove mates with the support rod 231 on the retaining bracket 230, thereby preventing the heating assembly from rotating during operation.

[0042] In addition, since the size of the heating tube is small, generally with a diameter between 25mm and 40mm, the openings on the end cap 400 can only be distributed dispersedly, so during the tightening process, the various lines rotate with it and are easily entangled. Figure 9 As shown, the end cap 400 in the present application includes a cover plate 410 and an annular gland. The annular gland is used to press the cover plate 410 against the upper end surface of the air duct body 100. In specific implementation, the opening originally provided on the end cap 400 is provided on the cover plate 410. After the various wiring connections are installed and connected, the cover plate 410 is pressed against the upper end surface of the air duct body 100. The inner side of the annular gland and the outer side of the air duct body 100 are provided with matching threads. When the annular gland is tightened, the cover plate 410 can be pressed between the annular gland and the air duct body 100. During this process, the cover plate 410 will not rotate.

[0043] It should be noted that the skeleton 210 in the present application is made of high-temperature resistant materials such as ceramics or quartz, and is preferably cylindrical, but can also be prismatic. The present application does not specifically limit its shape and material.

[0044] The utility model also provides a film coating device, comprising a plurality of the above-mentioned hot air pipes, which is used for coating photovoltaic modules.

[0045] The laminating equipment uses air compression to provide compressed air to each hot air pipe. Depending on the laminating requirements and film size, a considerable number of hot air pipes are required, which can directly lead to insufficient air supply to the hot air pipes. Therefore, an air amplifier 450 is installed at the air inlet of the end cap 400. Air amplifiers 450 with different amplification ratios can be selected according to different needs, thereby reducing the hot air pipe's demand for compressed air while ensuring sufficient air flow.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot air duct, comprising an air duct body (100), and end covers (400) and air nozzles (600) respectively mounted at both ends of the air duct body (100), wherein a heating component and a temperature measuring component (500) are provided in the air duct body (100), characterized in that: The heating component comprises: A plurality of skeletons (210), wherein the skeletons (210) are provided with a restraining structure; A heating wire (220) is wound around the frame (210) and is positionally engaged with the restraining structure; The retaining frames (230) are provided at both ends of the frame (210) and are used to erect each frame (210) and constrain it in the air duct of the air duct main body (100).

2. A hot air duct according to claim 1, characterized in that: The temperature measuring component (500) comprises a thermocouple (510) and a protective rod (520); the end of the protective rod (520) is provided with a concave cavity for accommodating the temperature measuring portion of the thermocouple (510), and the end is arranged close to the air outlet end of the air duct body (100).

3. The hot air duct according to claim 1, characterized in that: The retaining frame (230) is integrally formed of a plurality of support rods (231) in a divergent shape, and the support rods (231) are positionally matched with the frame (210).

4. The hot air duct according to claim 1, characterized in that: The constraint structure is a spiral guide groove (211a), and the depth of the guide groove (211a) is less than the radius length of the heating wire (220).

5. The hot air duct according to claim 1, characterized in that: The heating wire (220) is one and is wound around the outside of each of the skeletons (210) in sequence.

6. The hot air duct according to claim 1, characterized in that: An insulating sleeve (300) is provided in the air duct body (100), and the heating component is provided in the insulating sleeve (300).

7. The hot air duct according to claim 6, characterized in that: The insulating sleeve (300) comprises an upper sleeve (310) and a lower sleeve (320), the inner diameter of the upper sleeve (310) is smaller than the inner diameter of the lower sleeve (320), and the upper sleeve (310) is used to constrain the heating component within the lower sleeve (320).

8. The hot air duct according to claim 1, characterized in that: The end cover (400) comprises a cover plate (410) and an annular pressure cover (420), wherein the annular pressure cover (420) is used to press the cover plate (410) against the upper end surface of the air duct body (100).

9. The hot air duct according to claim 1, characterized in that: An air amplifier (450) is installed on the air inlet of the end cover (400).

10. A film coating device for photovoltaic modules, characterized in that: The invention comprises a plurality of hot air pipes according to any one of claims 1 to 9.

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