Solar cell heat treatment apparatus

Abstract

The application discloses a solar cell heat treatment equipment, which comprises a furnace body and a heating system. The heating system comprises an air inlet air channel located at a first side wall of the furnace body, an air outlet air channel located at a second side wall of the furnace body and a heat supply source communicated with the air inlet air channel. The air inlet air channel and the air outlet air channel are communicated with an inner cavity of the furnace body, and the first side wall and the second side wall are oppositely arranged. The air inlet air channel uniformly inputs hot air into the inner cavity of the furnace body. The hot air flows laterally from the first side wall to the second side wall in the inner cavity of the furnace body, and then is discharged from the inner cavity of the furnace body through the air outlet air channel. The temperature of each part in the furnace body is uniform. A plurality of solar cells are longitudinally and spacedly arranged in the inner cavity of the furnace body. The hot air passes through the gaps between the plurality of adjacent solar cells and fully contacts the upper and lower surfaces of the solar cells. Therefore, the application is suitable for heat treatment of the plurality of solar cells which are longitudinally and spacedly arranged.

Description

Technical Field

[0001] This invention relates to the field of solar cell production technology, specifically to a solar cell heat treatment device. Background Technology

[0002] Compared to other renewable energy sources, solar power generation technology has many outstanding advantages, such as being unrestricted by geographical location and having huge reserves. In existing technologies, solar cells are commonly used to convert the sun's radiation energy into usable electrical energy. Currently, the production process of solar cells requires heat treatment equipment. For example, when it is necessary to solidify the conductive paste printed on the silicon wafer of the solar cell, heat treatment equipment can be used to dry and sinter the conductive paste to solidify it into electrode grid lines.

[0003] In existing solar cell heat treatment equipment, the heat required for curing is provided by heating lamps installed inside the furnace. The heating lamps heat the solar cells through thermal irradiation. The heating lamps can only be installed on the upper and lower sides of a single-layer solar panel so that they can irradiate the upper and lower surfaces of the sheet-like solar panel. The solar cells are arranged in a single layer, and at most a few rows can be arranged side by side. The solar cell heat treatment equipment can accommodate a small number of solar cells at a time, which limits the production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a solar cell heat treatment device with uniform temperature inside the furnace, suitable for situations where multiple solar cells are stacked longitudinally, and with high production efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution, comprising a furnace body and a heating system, characterized in that the heating system includes an air inlet duct located on the first side wall of the furnace body, an air outlet duct located on the second side wall of the furnace body, and a heat source connected to the air inlet duct. Both the air inlet duct and the air outlet duct are connected to the inner cavity of the furnace body, and the first and second side walls are arranged opposite to each other. Both the first and second side walls extend longitudinally.

[0006] As a further improvement of the present invention, the air inlet path includes an air inlet located on the outer side of the first side wall and connected to the heat source, a plurality of first openings located on the inner side of the first side wall, and a first air distribution duct connecting the air inlet and the plurality of first openings.

[0007] As a further improvement of the present invention, the first air distribution duct includes a first intermediate air cavity disposed in the middle of the first side wall and communicating with a plurality of first openings, and a first air distribution cavity disposed in the first intermediate air cavity. The inlet of the first air distribution cavity is the air inlet of the air inlet path, and it has a plurality of outlets, and the air outlet direction is perpendicular to the axis of the first opening.

[0008] As a further improvement of the present invention, the exhaust air path includes a plurality of second openings located on the inner side of the second side wall, an air outlet located on the outer side of the second side wall, and a second air distribution duct connecting the plurality of second openings and the air outlet.

[0009] As a further improvement of the present invention, the second air distribution duct includes a second intermediate air cavity disposed in the middle of the second side wall and communicating with a plurality of second openings, and a second air distribution cavity disposed in the second intermediate air cavity. The outlet of the second air distribution cavity is the air outlet of the exhaust air path, and it has a plurality of inlets, and the air inlet direction is perpendicular to the axis of the second opening.

[0010] As a further improvement of the present invention, the first air distribution cavity and the second air distribution cavity are H-shaped and are evenly arranged in the first intermediate air cavity and the second intermediate air cavity, respectively. The outlet of the first air distribution cavity or the inlet of the second air distribution cavity is opened through on both sides of the H-shape.

[0011] As a further improvement of the present invention, the first air distribution cavity and the second air distribution cavity are provided in two or four places respectively in the first intermediate air cavity and the second intermediate air cavity.

[0012] As a further improvement of the present invention, a hollow perforated plate is provided on the second side of the furnace body, a first heat insulation layer is provided on the outer side of the perforated plate, and a second heat insulation layer is provided on the top of the furnace body. The perforated plate, the first heat insulation layer and the second heat insulation layer form the three sidewalls of the first intermediate air cavity. A plurality of second openings are provided on the side of the perforated plate close to the inner cavity of the furnace body, and a plurality of third openings are provided on the side away from the inner cavity of the furnace body.

[0013] As a further improvement of the present invention, a raised ring is provided on the side of the perforated plate near the inner cavity of the furnace body, a plurality of second openings are provided within the area enclosed by the bottom of the ring, and the top of the ring is covered with a mesh.

[0014] As a further improvement of the present invention, the furnace body includes a plurality of furnace sections connected sequentially along the length direction, and the first sidewall and the second sidewall of each furnace section are respectively provided with the air inlet passage and the air outlet passage.

[0015] The beneficial effects of this invention are as follows:

[0016] The solar cell heat treatment equipment provided by this invention has an air inlet and an air outlet on the first and second side walls of the furnace body, respectively. The air inlet uniformly inputs hot air into the inner cavity of the furnace body. The hot air flows laterally from the first side wall to the second side wall in the inner cavity of the furnace body, and then exits the inner cavity of the furnace body through the air outlet. The temperature is uniform throughout the furnace body. Multiple solar cells are placed longitudinally at intervals in the inner cavity of the furnace body. The hot air passes through the gaps between multiple adjacent solar cells and makes full contact with the upper and lower surfaces of the solar cells. Therefore, this invention is suitable for heat treatment of multiple solar cells placed longitudinally at intervals. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of a solar cell heat treatment device provided by the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the central furnace body;

[0019] Figure 3 for Figure 1 A perspective view of one side of a section of the furnace body;

[0020] Figure 4 for Figure 3 A structural schematic diagram showing the other side of the intermediate furnace section;

[0021] Figure 5 for Figure 3 Schematic diagram of the structure of the perforated plate and the mesh;

[0022] Figure 6 for Figure 1 Schematic diagram of the structure of the intermediate furnace body;

[0023] Figure 7 This is a schematic diagram of the structure of the first heat treatment unit of a solar cell heat treatment device provided by the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of the second heat treatment unit of a solar cell heat treatment device provided by the present invention;

[0025] Figure 9 A schematic diagram of the heat treatment system in a solar cell heat treatment device provided in the application;

[0026] Figure 10 for Figure 6 A schematic diagram of the local structure of the furnace section corresponding to the input or output section;

[0027] Figure 11 for Figure 6 A front view structural diagram of the central furnace body, in which the main door at the front is hidden;

[0028] Figure 12 for Figure 6 A schematic diagram of the structure of another part of the furnace section corresponding to the input or output section;

[0029] Figure 13 This is a schematic diagram of the structure of a solar cell heat treatment device provided by the present invention;

[0030] Figure 14 This is a partial structural schematic diagram of a solar cell heat treatment device provided by the present invention;

[0031] Figure 15 for Figure 13 A schematic diagram of the supporting mechanism that houses the solar cells;

[0032] Figure 16 A side view of a solar cell heat treatment device provided by the present invention;

[0033] In the picture:

[0034] 1. Bracket;

[0035] 2. Furnace body; 21. First furnace section; 22. Second furnace section; 23. Input section; 24. Intermediate section; 25. Output section; 26. First insulation layer; 27. Second insulation layer;

[0036] 3. Conveying device; 31. Conveying mechanism; 311. Roller; 312. First driving component; 313. Guide bar; 3131. First inclined plane; 32. Bearing mechanism; 321. Bearing part; 322. Upper end plate; 323. Lower end plate; 324. Support column; 325. Second inclined plane;

[0037] 4. Fan; 41. First fan; 42. Second fan; 43. Exhaust fan;

[0038] 5. Waste gas treatment device;

[0039] 6. Exhaust gas emission outlet;

[0040] 7. Air inlet path; 71. Air inlet; 72. First opening; 73. First air distribution duct; 731. First intermediate air chamber; 732. First air distribution chamber;

[0041] 8. Exhaust air duct; 81. Exhaust outlet; 82. Second opening; 83. Second air distribution duct; 831. Second intermediate air chamber; 832. Second air distribution chamber;

[0042] 9. Perforated plate; 91. Third opening; 92. Encircling ring; 93. Mesh netting;

[0043] 10. Door assembly; 101. Door body; 102. Second drive component;

[0044] 11. Support plate; 111. Pad block; 112. Slide rail;

[0045] 12. Connecting block;

[0046] 13. Sliding groove. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0048] like Figure 1 As shown, a solar cell heat treatment device is used to heat treat solar cells. It includes a support 1, a furnace body 2 located on the support 1, and a heating system for supplying heat into the furnace body 2. The heating system includes an air inlet passage 7 and an air outlet passage 8 respectively arranged on the first and second side walls opposite to each other of the furnace body 2, and a heat source connected to the air inlet passage 7. The air inlet passage 7 and the air outlet passage 8 are connected to the inner cavity of the furnace body 2.

[0049] The heat source, the hot air supplied by the air inlet duct 7, can be evenly input into the inner cavity of the furnace body 2. Within the inner cavity of the furnace body 2, the hot air flows laterally from the first side wall towards the second side wall, and then flows out of the inner cavity of the furnace body 2 through the exhaust duct 8. This arrangement is suitable for heat-treating multiple solar cells placed longitudinally at intervals. The hot air delivered to the inner cavity of the furnace body 2 by the air inlet duct 7 can pass through the gaps between adjacent solar cells, making full contact with the upper and lower surfaces of the solar cells, effectively curing the paste printed on the solar cells. The heat source can be a first fan 41 capable of heating air.

[0050] like Figures 2 to 5 As shown, the air inlet duct 7 includes an air inlet 71 located on the outer side of the first side wall, a plurality of first openings 72 located on the inner side of the first side wall, and a first air distribution duct 73 connecting the air inlet 71 and the plurality of first openings 72. The air inlet 71 can be connected to a heat source on the equipment. The heat source inputs hot air into the air inlet duct 7. The hot air enters through the first air distribution duct 73 and is discharged from the plurality of first openings 72, uniformly entering the inner cavity of the furnace body 2. The plurality of first openings 72 can be uniformly opened on the inner side of the first side wall of the furnace body 2, occupying a sufficient area to ensure that the air is blown to all areas inside the furnace body 2 without dead corners.

[0051] The first air distribution duct 73 includes a first intermediate air chamber 731 disposed in the middle of the first side wall and communicating with multiple first openings 72, and a first air distribution chamber 732 disposed within the first intermediate air chamber 731. The inlet of the first air distribution chamber 732 is the air inlet 71 of the air inlet duct 7, and multiple outlets are provided, with the air outlet direction perpendicular to the axis of the first openings 72. Hot air supplied by the heat source enters from the inlet of the first air distribution chamber 732 and is discharged from the outlet of the first air distribution chamber 732. The hot air discharged from the outlet of the first air distribution chamber 732 is discharged outward from multiple outlets at a certain wind speed, filling the entire first intermediate air chamber 731, and then enters the inner cavity of the furnace body 2 through multiple first openings 72 from the first intermediate air chamber 731, so that the hot air supplied by the heat source can enter the inner cavity of the furnace body 2 evenly from multiple first openings 72.

[0052] Similar to the air inlet duct 7, the air outlet duct 8 includes an air outlet located on the outer side of the second side wall, a plurality of second openings 82 located on the inner side of the second side wall, and a second uniform air duct 83 connecting the air outlet and the plurality of second openings 82. The hot air inside the furnace body 2 is evenly discharged from the plurality of second openings 82 to the second uniform air duct 83, and then discharged from the air outlet.

[0053] The second uniform air duct 83 includes a second intermediate air chamber 831 located in the middle of the second side wall and connected to multiple second openings 82, and a second uniform air chamber 832 located within the first intermediate air chamber 731. The outlet of the second uniform air chamber 832 is the outlet of the exhaust air duct 8, and multiple inlets are provided, with the air inlet direction perpendicular to the axis of the first opening 72. The hot air inside the furnace body 2 enters the second intermediate air chamber 831 uniformly from the multiple second openings 82 at a certain wind speed, then enters the second uniform air chamber 832 uniformly from the multiple inlets, and finally exits from the exhaust port 81.

[0054] The first air equalization cavity 732 and the second air equalization cavity 832 are H-shaped and are evenly arranged in the first intermediate air cavity 731 and the second intermediate air cavity 831, respectively. The H-shaped first air equalization cavity 732 or the second air equalization cavity 832 can be vertically arranged in the corresponding first intermediate air cavity 731 or the second intermediate air cavity 831. The outlet of the first air equalization cavity 732 or the inlet of the second air equalization cavity 832 is opened through on both sides of the H-shape. This arrangement allows the outlet of the first air equalization cavity 732 or the inlet of the second air equalization cavity 832 to be evenly distributed along the length and width of the first air equalization cavity 732 or the second air equalization cavity 832, thereby achieving a good air equalization effect.

[0055] The first air equalization cavity 732 and the second air equalization cavity 832 are respectively provided in two or four of the first intermediate air cavity 731 and the second intermediate air cavity 831. The specific number depends on the space of the first air equalization cavity 732 or the second air equalization cavity 832, so that the outlet of the first air equalization cavity 732 or the inlet of the second air equalization cavity 832 are evenly distributed in the first air equalization cavity 732 or the second air equalization cavity 832.

[0056] A hollow perforated plate 9 is provided on the second side wall of the furnace body 2. A first heat insulation layer 26 is provided on the outside of the perforated plate 9, and a second heat insulation layer 27 is provided on the top of the furnace body 2. The perforated plate 9, the first heat insulation layer 26, and the second heat insulation layer 27 form the three side walls of the second intermediate air cavity 831. The other side walls of the second intermediate air cavity 831 are also closed. The heat insulation layer has the effect of heat preservation for the furnace body 2. A second opening 82 is opened on the side of the perforated plate 9 close to the inner cavity of the furnace body 2, and a third opening 91 is opened on the side away from the inner cavity of the furnace body 2. The air in the furnace body 2 passes through multiple second openings 82 and multiple third openings 91 to reach the second intermediate air cavity 831, and the airflow is more uniform.

[0057] A raised ring 92 is provided on the side of the perforated plate 9 near the inner cavity of the furnace body 2. Multiple second openings 82 are set within the area enclosed by the bottom of the ring 92. The top of the ring 92 is covered with a mesh 93. The air inside the furnace body 2 passes through the mesh 93 before reaching the multiple second openings 82, resulting in a more uniform airflow.

[0058] The exhaust duct 8 is connected to the exhaust gas treatment system. Harmful substances are generated during the thermal treatment of solar cells. The hot air discharged from the exhaust duct 8 is treated by the exhaust gas treatment system before being discharged to the outside.

[0059] like Figure 7 As shown, the exhaust gas treatment system includes an exhaust gas treatment device 5, an exhaust fan 43, and an exhaust gas outlet 6. The outlet pipe of the exhaust duct 8 is connected to the inlet of the exhaust gas treatment device 5, the outlet of the exhaust gas treatment device 5 is connected to the inlet of the exhaust fan 43, and the outlet of the exhaust fan 43 is connected to the exhaust gas outlet 6. The hot gas flowing out of the exhaust duct 8 is treated by the exhaust gas treatment device 5 and then driven by the exhaust fan 43 to be discharged from the exhaust gas outlet 6.

[0060] like Figures 6 to 9 As shown, the furnace body 2 includes multiple furnace sections connected sequentially along the length direction. Each furnace section has an air inlet passage 7 and an air outlet passage 8 respectively provided on the first and second side walls opposite to each other, so that the temperature of each area inside the furnace body 2 is uniform. The inner cavity of each furnace section can serve as a heat treatment zone for heat treatment of solar cells. The first fan 41 and the exhaust gas treatment system are provided in multiple ways.

[0061] The support 1 is equipped with multiple fans 4, including the aforementioned first fan 41 and exhaust fan 43, as well as a second fan 42 located between the two furnace sections.

[0062] Multiple furnace sections, multiple fans 4 located on support 1, multiple waste gas treatment devices 5 in multiple waste gas treatment systems, multiple exhaust fans 43, and multiple waste gas exhaust ports 6 are divided into multiple different heat treatment units according to their interconnection. Each heat treatment unit includes one waste gas treatment device 5, one waste gas exhaust port 6, at least two furnace sections, and three fans 4. In the heat treatment unit, the furnace sections include a first furnace section 21 and a second furnace section 22.

[0063] Specifically, as a type of heat treatment unit, the first heat treatment unit includes a first fan 41, a first furnace section 21, a second fan 42, a second furnace section 22, a waste gas treatment device 5, an exhaust fan 43, and a waste gas discharge port 6, which are connected in sequence through pipelines.

[0064] The first fan 41 and the second fan 42 have inlets and outlets respectively. The outlet of the first fan 41 is connected to the inlet 71 of the air inlet passage 7 of the first furnace section 21. The inlet of the second fan 42 is connected to the outlet 81 of the exhaust passage 8 of the first furnace section 21. The outlet of the second fan 42 is connected to the inlet 71 of the air inlet passage 7 of the second furnace section 22. The outlet 81 of the exhaust passage 8 of the second furnace section 22 is connected to the inlet of the waste gas treatment device 5. The outlet of the waste gas treatment device 5 is connected to the inlet of the exhaust fan 43. The outlet of the exhaust fan 43 is connected to the exhaust outlet 6.

[0065] During operation, hot air delivered by the first fan 41 enters the inner cavity of the first furnace section 21 through the air inlet duct 7. Then, driven by the second fan 42, it is extracted from the exhaust duct 8 of the first furnace section 21. The extracted hot air enters the inner cavity of the second furnace section 22 through the air inlet duct 7. The hot air in both furnace sections 21 and 22 can heat-treat the solar cells within them. The hot air in the second furnace section 22 flows through its exhaust duct 8 to the waste gas treatment device 5. After removing harmful substances, the hot air, driven by the exhaust fan 43, flows from the outlet of the waste gas treatment device 5 to the waste gas discharge port 6 and is discharged. The first furnace section 21 and the second furnace section 22 can share a single waste gas treatment device 5.

[0066] As another type of heat treatment unit, the second heat treatment unit differs from the first heat treatment unit in that the second heat treatment unit has two second furnace sections 22, which are connected in parallel between the second fan 42 and the exhaust gas treatment device 5. In this case, the three furnace sections, one first furnace section 21 and two second furnace sections 22, share one exhaust gas treatment device 5.

[0067] The first heat treatment unit and the second heat treatment unit together form a solar cell heat treatment system. Each heat treatment unit can work independently, so this device can include only one heat treatment unit.

[0068] The heat treatment of solar cells is divided into an input section 23, an intermediate section 24, and an output section 25. In the input section 23, the solar cells are preheated from room temperature to the temperature required for heat treatment. In the intermediate section 24, the solar cells are stabilized at the temperature required for heat treatment. In the output section 25, the solar cells are cooled from the temperature required for heat treatment to room temperature. The amount of harmful substances produced by the solar cells in the input section 23 and the output section 25 is less than the amount produced by the solar cells in the intermediate section 24. Therefore, the two second furnace sections 22 of the second heat treatment unit can be used to heat treat the solar cells in the input section 23 and the output section 25, respectively, while the other furnace sections are used to heat treat the solar cells in the intermediate section 24. Specifically, the first furnace section 21 and the second furnace section 22 of the first heat treatment unit and the first furnace section 21 of the second heat treatment unit are all located between the two second furnace sections 22 of the second heat treatment unit. The amount of harmful substances produced in the two furnace sections of the first heat treatment unit and the three furnace sections of the second heat treatment unit can be kept in balance, making full use of the processing capacity of the waste gas treatment device 5. The first heat treatment unit is set up with two units, and this equipment has a total of several furnace sections.

[0069] The inner cavities of the first furnace section 21 and the second furnace section 22 of the first heat treatment unit and the first furnace section 21 and the second furnace section 22 of the second heat treatment unit are connected in sequence to form a furnace body 2. The two second furnace sections 22 of the second heat treatment unit are respectively used as input section 23 and output section 25 at both ends of the furnace body 2, and the rest are intermediate sections 24. The solar cells can flow continuously in the inner cavity of the furnace body 2.

[0070] Furthermore, the second furnace section 22 of the second heat treatment unit is provided with door assemblies 10 that can be opened or closed on both sides. In this way, before the solar panel enters the inner cavity of the input section 23, the door assembly 10 at the end of the input section 23 away from the middle section 24 is open, and the door assembly 10 at the end closer to the middle section 24 is closed. After the solar panel enters the inner cavity of the input section 23, the door assembly 10 at the end of the input section 23 away from the middle section 24 is closed, and the door assembly 10 at the end closer to the middle section 24 is open, so that the solar panel can enter the middle section 24 from the input section 23. After the solar panel passes through the middle section 24 and enters the inner cavity of the output section 25, the door assembly 10 at the end of the output section 25 near the middle section 24 is closed, and the door assembly 10 at the end away from the middle section 24 is open, so that the solar panel can leave the inner cavity of the furnace body 2.

[0071] Due to the obstruction of the door assembly 10, the heat of the middle section 24 is not easily dissipated when the solar panel enters or leaves the inner cavity of the furnace body 2. The temperature of the middle section 24 can remain stable, ensuring the curing effect and preventing the leakage of harmful gases inside the furnace body 2, as well as saving energy. As the main working area of ​​the furnace body 2, the inner cavity volume of the middle section 24 is at least 5 times the volume of the input section 23 or the output section 25.

[0072] like Figures 10 to 12 As shown, each door assembly 10 includes a door body 101 that moves along the end face of the corresponding furnace section of the furnace body 2, and a second driving member 102 for driving the door body 101 to move. The door body 101 is driven by the second driving member 102 to move along the end face of its corresponding furnace section. Compared with the rotational opening or closing method, this does not cause the flow of gas in the inner cavity of the furnace body 2, ensuring that heat is not lost, and saving the space required in the length direction of the furnace body 2. The second driving member 102 can be a telescopic cylinder.

[0073] The door body 101 can move along the height direction, width direction and tilt direction of the furnace section corresponding to the furnace body 2 where it is located. It only needs to be able to open and close the opening on the end face of its furnace section. In this embodiment, the door body 101 is preferably set to move along the width direction of the furnace section corresponding to the furnace body 2 where it is located.

[0074] Each door body 101 can be a single piece, moving to one side under the drive of the second drive unit 102 to open and close its furnace section, or it can be multiple pieces, each moving in a different direction to open and close its furnace section. The door body 101 can be made of polyurethane, which has good heat insulation, wear resistance and anti-aging effects.

[0075] A support plate 11 is provided on the top wall of the furnace body 2, located on one side of the door body 101 and along the moving direction of the door body 101. The door body 101 is slidably connected to the support plate 11, and one end of the support plate 11 extends beyond the furnace body 2 in the width direction. When the door body 101 moves to one side and opens, it can extend beyond the furnace body 2. A second driving member 102 is installed on the support plate 11, and its driving end is connected to one side of a connecting block 12. The other side of the connecting block 12 can be connected to the door body 101 through multiple connecting holes. The second driving member 102 drives the door body 101 to move through the connecting block 12.

[0076] The support plate 11 has pads 111 on both sides of the connecting block 12. The pads 111 are positioned in the moving direction of the connecting block 12 and can contact the connecting block 12. By controlling the installation position of the two pads 111, the moving range of the connecting block 12 can be limited, and the moving range of the door body 101 is also limited. In addition, the pads 111 can be made of elastic material to cushion the impact force when the pads 111 contact the door body 101.

[0077] The top of the door body 101 is slidably connected to the support plate 11 via a slide rail 112. The slide rail 112 is a common commercially available component used between the door body 101 and the support plate 11 to ensure the stability of the sliding direction of the door body 101 relative to the support plate 11 and to reduce the resistance during sliding.

[0078] The bottom of the door body 101 is slidably disposed in the sliding groove 13 located at the bottom of the furnace body 2. The sliding groove 13 at the bottom cooperates with the slide rail 112 at the top to ensure that the door body 101 slides reliably and smoothly.

[0079] The furnace body 2 also includes a control system, which is electrically connected to the second drive unit 102 to control the door body 101 at one end of the same furnace section to be closed when the door body 101 at the other end is opened, so as to prevent heat loss from the furnace body 2.

[0080] like Figures 13 to 15 As shown, the support 1 is also equipped with a conveying device 3 for conveying solar cells.

[0081] The conveying device 3 includes a conveying mechanism 31 that runs through the furnace body 2 and a supporting mechanism 32 that carries solar cells. The supporting mechanism 32 has at least two layers of supporting parts 321 that are spaced apart along the height direction of the furnace body 2.

[0082] The distance between two adjacent support parts 321 is not less than 2mm to ensure that enough hot air can pass between the two adjacent support parts 321.

[0083] The conveying mechanism 31 includes multiple rollers 311 arranged along the length of the furnace body 2 and a first driving member 312 for driving the rollers 311 to rotate. The carrying mechanism 32 is arranged above the multiple rollers 311 and moves within the furnace body 2 driven by the multiple rollers 311. A silicone layer may be provided around the rollers 311 to serve as a buffer between the carrying mechanism 32 and the conveying mechanism 31, and to increase the friction between the carrying mechanism 32 and the conveying mechanism 31, so that the carrying mechanism 32 can smoothly convey forward.

[0084] Guide bars 313 are provided on both sides of the carrying mechanism 32 above the conveying mechanism 31. When the carrying mechanism 32 is driven to move by the conveying mechanism 31, the guide bars 313 can limit the range of movement of the carrying mechanism 32, allowing the carrying mechanism 32 to move along the length direction of the conveying mechanism 31. The opposite surfaces of the guide bars 313 on both sides are provided with a first inclined surface 3131. The side end of the bottom of the carrying mechanism 32 adjacent to the guide bars 313 is provided with a second inclined surface 325 that cooperates with the first inclined surface 3131. The first inclined surface 3131 makes the two guide bars 313 form an outward opening structure at the end, while the second inclined surface 325 makes the bottom of the carrying mechanism 32 form an inward closing structure. In this way, the bottom of the carrying mechanism 32 can easily enter between the two guide bars 313 and move along the length direction of the conveying mechanism 31.

[0085] The guide strip 313 is made of Teflon or has a Teflon layer on its adjacent side. Teflon has a low coefficient of friction, so there is not much resistance when the bottom of the bearing mechanism 32 contacts the guide strip 313.

[0086] The support portion 321 includes a lower end plate 323, an upper end plate 322 located above the lower end plate 323, and a plurality of support columns 324 connected to the lower end plate 323 and the upper end plate 322 at both ends respectively. The support portion 321 is a groove spaced apart along the height direction of the plurality of support columns 324. When the solar cell is placed in the support portion 321, there is less obstruction around it, and the hot air in the furnace body 2 can easily reach the upper and lower surfaces of the solar cell, which also facilitates the removal and placement of the solar cell.

[0087] The height of the support mechanism 32 is greater than its width, and multiple support parts 321 can be arranged in the height direction of the support mechanism 32. The height of the inner cavity of the furnace body 2 is greater than its width to accommodate the support mechanism 32.

[0088] Multiple solar cells can be correspondingly arranged in multiple support sections 321 and stacked longitudinally within the support mechanism 32. For thin sheet-like items like solar panels, longitudinal stacking significantly reduces the area occupied by the solar panels compared to flat placement, allowing the solar cell heat treatment equipment to accommodate more solar cells at once and improving production efficiency.

[0089] like Figure 16As shown, multiple exhaust gas treatment devices 5 are installed at the bottom of the support frame 1, and multiple fans 4 are installed between the furnace body 2 and the exhaust gas treatment devices 5. The fans 4 are positioned below the furnace body 2 to facilitate pipe connection with the air inlet ducts 7 and exhaust ducts 8 located on opposite sides of the furnace body 2. The exhaust gas treatment devices 5 are located at the bottom of the support frame 1 for easy pipe connection with the fans 4. Furthermore, the exhaust gas treatment devices 5 have a certain weight, and their placement at the bottom of the support frame 1 facilitates installation and maintenance, and lowers the center of gravity of the equipment, making it more stable. The exhaust gas discharge port 6 is located at the top of the support frame 1, and the hot gas treated by the exhaust gas treatment devices 5 is discharged above the support frame 1, without affecting equipment or personnel operations.

[0090] Multiple exhaust gas treatment devices 5 are located directly below the furnace body 2 and are arranged sequentially along the length of the furnace body 2. Multiple fans 4 are also located directly below the furnace body 2 and are arranged sequentially along the length of the furnace body 2. The weight of the furnace body 2, multiple fans 4 and multiple exhaust gas treatment devices 5 are evenly distributed on the support 1, and the equipment layout is relatively compact.

[0091] The waste gas treatment device 5 is a combustion tower, which is suitable for treating the organic waste gas generated during the thermal treatment of solar cells.

[0092] In summary, the present invention has at least the following advantages:

[0093] 1. The air inlet duct 7 and air outlet duct 8, respectively set on the first and second side walls opposite to each other in the furnace body 2, can effectively solidify the paste on multiple solar cells placed longitudinally at intervals, and the temperature inside the furnace body 2 is uniform.

[0094] 2. Connecting multiple furnace sections in series or parallel and sharing a single waste gas treatment device 5 saves on equipment cost and size.

[0095] 3. The door assembly 10 can seal the connection between the input section 23 or the output section 25 and the intermediate section 24, preventing heat loss from the furnace body 2 before the solar cells enter or leave the furnace body 2, ensuring the stability of the internal temperature of the furnace body 2, and avoiding the leakage of harmful substances and the waste of energy.

[0096] 4. Multiple solar panels can be placed longitudinally at intervals inside the furnace body 2. Compared with existing equipment, the furnace body 2 can accommodate more solar cells at one time, thus improving production efficiency.

[0097] 5. The exhaust gas treatment device 5 is placed at the bottom of the support 1, which makes it easy to install and maintain, and lowers the center of gravity of the equipment, making the equipment more stable.

[0098] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0099] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A solar cell thermal processing device, comprising a furnace body and a heating system, characterized in that, The heating system includes an air inlet duct located on the first side wall of the furnace body, an air outlet duct located on the second side wall of the furnace body, and a heat source connected to the air inlet duct. Both the air inlet duct and the air outlet duct are connected to the inner cavity of the furnace body, and the first side wall and the second side wall are arranged opposite to each other. The air intake path includes an air inlet located on the outer side of the first sidewall and connected to the heat source, a plurality of first openings located on the inner side of the first sidewall, and a first air distribution duct connecting the air inlet and the plurality of first openings. The first air distribution duct includes a first intermediate air cavity disposed in the middle of the first side wall and communicating with multiple first openings, and a first air distribution cavity disposed in the first intermediate air cavity. The inlet of the first air distribution cavity is the air inlet of the air inlet path, and it has multiple outlets, with the air outlet direction perpendicular to the axis of the first opening. The first air distribution cavity is H-shaped and multiple outlets are evenly disposed in the first intermediate air cavity. The outlet of the first air distribution cavity is opened through on both sides of the H-shape.

2. The solar cell heat treatment equipment according to claim 1, characterized in that, The exhaust duct's outlet pipe is connected to the waste gas treatment system.

3. The solar cell heat treatment equipment according to claim 2, characterized in that, The exhaust gas treatment system includes an exhaust gas treatment device, an exhaust fan, and an exhaust gas outlet. The exhaust duct outlet is connected to the inlet of the exhaust gas treatment device, the outlet of the exhaust gas treatment device is connected to the inlet of the exhaust fan, and the outlet of the exhaust fan is connected to the exhaust gas outlet.

4. The solar cell heat treatment equipment according to claim 1, characterized in that, The exhaust duct includes a plurality of second openings located on the inner side of the second side wall, an air outlet located on the outer side of the second side wall, and a second air distribution duct connecting the plurality of second openings and the air outlet.

5. The solar cell heat treatment equipment according to claim 4, characterized in that, The second air distribution duct includes a second intermediate air chamber disposed in the middle of the second side wall and communicating with multiple second openings, and a second air distribution chamber disposed in the second intermediate air chamber. The outlet of the second air distribution chamber is the air outlet of the exhaust air path, and it has multiple inlets, with the air inlet direction perpendicular to the axis of the second opening.

6. The solar cell heat treatment equipment according to claim 5, characterized in that, The second air distribution cavity is H-shaped and multiple such cavities are evenly arranged within the second intermediate air cavity. The inlet of the second air distribution cavity is opened through both sides of the H-shape.

7. The solar cell heat treatment equipment according to claim 6, characterized in that, The first air distribution cavity and the second air distribution cavity are provided in two or four places in the first intermediate air cavity and the second intermediate air cavity, respectively.

8. The solar cell heat treatment equipment according to claim 5, characterized in that, A hollow perforated plate is provided on the second side of the furnace body. A first heat insulation layer is provided on the outside of the perforated plate, and a second heat insulation layer is provided on the top of the furnace body. The perforated plate, the first heat insulation layer, and the second heat insulation layer form the three sidewalls of the first intermediate air cavity. Multiple second openings are provided on the side of the perforated plate close to the inner cavity of the furnace body, and multiple third openings are provided on the side away from the inner cavity of the furnace body.

9. The solar cell heat treatment equipment according to claim 8, characterized in that, The perforated plate has a raised ring on the side near the inner cavity of the furnace body, and a plurality of second openings are provided within the area enclosed by the bottom of the ring. The top of the ring is covered with a mesh.

10. The solar cell thermal treatment apparatus according to any one of claims 1 to 9, characterized in that, The furnace body includes multiple furnace sections connected sequentially along its length. Each furnace section has an air inlet passage and an air outlet passage respectively provided on its opposite first and second side walls.

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