Solar cell heat treatment apparatus

Abstract

The application discloses a solar cell heat treatment equipment, which comprises a support, a furnace body arranged on the support, a heating system for conveying heat into the furnace body, a waste gas treatment system for treating waste gas in the furnace body, and a conveying device for conveying solar cells; the conveying device comprises a conveying mechanism penetrating through the furnace body and a carrying mechanism for carrying the solar cells, and the carrying mechanism has at least two layers of carrying portions arranged at intervals along the height direction of the furnace body, and the interval between the adjacent two carrying portions is not less than 2 mm. The solar cell heat treatment equipment provided by the application can longitudinally and intervally place a plurality of solar cell panels in the furnace body, compared with the prior art, the furnace body can accommodate more solar cells at one time, and the production efficiency is improved; the interval between the adjacent two carrying portions is not less than 2 mm, so that sufficient hot air can pass through between the adjacent two carrying portions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar cell production, in particular to a solar cell heat treatment equipment. BACKGROUND

[0002] Compared with other renewable energy sources, solar power generation technology has many outstanding advantages such as no geographical restrictions and huge reserves. In the prior art, solar cells are often used to convert the radiant energy of the sun into usable electric energy. In the production process of the solar cell, a heat treatment equipment is needed. For example, when the conductive paste printed on the solar cell silicon wafer needs to be solidified, the heat treatment equipment can be used to dry and sinter the conductive paste to form electrode grid lines.

[0003] The existing solar cell heat treatment equipment usually sets the solar cell as a single layer and horizontally lays the solar cell in the furnace body of the equipment. The furnace body can accommodate fewer solar cells at a time, and the efficiency improvement is very limited. To increase the output, the volume of the solidification furnace or the production line needs to be increased, which is costly. SUMMARY

[0004] The purpose of the present application is to provide a solar cell heat treatment equipment. Multiple layers of solar cells can be arranged in the inner cavity of the furnace body in the longitudinal direction. Compared with the prior art, the equipment can accommodate more solar panels at a time.

[0005] To achieve the above purpose, the present application adopts the following technical scheme: a support, a furnace body located on the support, a heating system for conveying heat into the furnace body, a waste gas treatment system for treating waste gas in the furnace body, and a conveying device for conveying solar cells; the conveying device includes a conveying mechanism penetrating through the furnace body and a carrying mechanism for carrying solar cells, the carrying mechanism has at least two layers of carrying parts arranged in the height direction of the furnace body, and the spacing between adjacent two carrying parts is not less than 2mm.

[0006] As a further improvement of the present application, the conveying mechanism includes a plurality of roller shafts arranged in the length direction of the furnace body and a driving member for driving the rotation of the roller shafts.

[0007] As a further improvement of the present application, a guide strip is arranged on both sides of the carrying mechanism above the conveying mechanism, the opposite surface ends of the two guide strips are provided with a first inclined surface, and the side end of the carrying mechanism adjacent to the guide strip is provided with a second inclined surface matched with the first inclined surface.

[0008] As a further improvement of the present application, the height of the carrying mechanism is greater than its width, and the furnace body has an inner cavity, and the height of the inner cavity is also greater than its width.

[0009] As a further improvement of the present application, the bearing mechanism comprises a lower end plate, an upper end plate located above the lower end plate, and a plurality of struts connected to the lower end plate and the upper end plate respectively, and the bearing part is a groove arranged along the height direction of the plurality of struts.

[0010] As a further improvement of the present application, the heating system comprises an air inlet air duct and an air outlet air duct arranged on the opposite first side wall and second side wall of the furnace body respectively, and a heat source connected to the air inlet of the air inlet air duct.

[0011] As a further improvement of the present application, the air inlet air duct comprises an air inlet connected to the heat source outside the first side wall, a plurality of first openings inside the first side wall, and a first air uniformizing duct connecting the air inlet and the plurality of first openings.

[0012] As a further improvement of the present application, the first air uniformizing duct comprises a first intermediate air cavity connected to the plurality of first openings in the middle of the first side wall, and a first air uniformizing cavity arranged in the first intermediate air cavity, the air inlet of the first air uniformizing cavity is the air inlet of the air inlet air duct, the air outlet of the first air uniformizing cavity is provided with a plurality of outlets, and the air outlet direction is perpendicular to the axis of the first opening.

[0013] As a further improvement of the present application, the air outlet air duct comprises a plurality of second openings inside the second side wall, an air outlet outside the second side wall, and a second air uniformizing duct connecting the plurality of second openings and the air outlet.

[0014] As a further improvement of the present application, the second air uniformizing duct comprises a second intermediate air cavity connected to the plurality of second openings in the middle of the second side wall, and a second air uniformizing cavity arranged in the second intermediate air cavity, the air inlet of the second air uniformizing cavity is the air outlet of the air outlet air duct, the air outlet of the second air uniformizing cavity is provided with a plurality of air inlets, and the air inlet direction is perpendicular to the axis of the second opening.

[0015] The beneficial effects of the present application are as follows:

[0016] The solar cell heat treatment equipment provided by the present application can place a plurality of solar cell panels in the furnace body in a longitudinal direction, which can accommodate more solar cells at a time compared with the existing equipment, thereby improving the production efficiency, and the distance between two adjacent bearing parts is not less than 2mm to ensure that sufficient hot air passes between the two adjacent bearing parts. In addition, the furnace body is provided with an air inlet air duct and an air outlet air duct on the opposite first side wall and second side wall respectively, which can effectively solidify the slurry on the plurality of solar cells arranged in the longitudinal direction. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0018] Figure 2 A front view structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0019] Figure 3 A partial structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0020] Figure 4 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application; Figure 1

[0021] A structure schematic diagram of a solar cell heat treatment equipment provided by the present application; Figure 5 Figure 1 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0022] Figure 6 Figure 1 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0023] Figure 7 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application; Figure 6

[0024] A structure schematic diagram of a solar cell heat treatment equipment provided by the present application; Figure 8 Figure 6 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0025] Figure 9 Figure 1 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0026] Figure 10 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0027] Figure 11 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0028] Figure 12 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0029] Figure 13 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application; Figure 9

[0030] A structure schematic diagram of a solar cell heat treatment equipment provided by the present application; Figure 14 Figure 9 A structure schematic diagram of a solar cell heat treatment equipment provided by the present application;

[0031] Figure 15 Figure 9 ​​​​​​A structure diagram of a partial furnace section corresponding to the middle input section or the output section;

[0032] Figure 16 A side structure diagram of a solar cell heat treatment equipment according to the present application is provided;

[0033] In the figure:

[0034] 1, support;

[0035] 2, furnace body; 21, first furnace section; 22, second furnace section; 23, input section; 24, middle section; 25, output section; 26, first heat insulation layer; 27, second heat insulation layer;

[0036] 3, conveying device; 31, conveying mechanism; 311, roller shaft; 312, first driving member; 313, guide bar; 3131, first inclined surface; 32, bearing mechanism; 321, bearing part; 322, upper end plate; 323, lower end plate; 324, support column; 325, second inclined surface;

[0037] 4, fan; 41, first fan; 42, second fan; 43, exhaust fan;

[0038] 5, waste gas treatment device;

[0039] 6, waste gas exhaust port;

[0040] 7, air inlet air path; 71, air inlet; 72, first opening; 73, first air equalizing air duct; 731, first intermediate air cavity; 732, first air equalizing cavity;

[0041] 8, exhaust air path; 81, exhaust air outlet; 82, second opening; 83, second air equalizing air duct; 831, second intermediate air cavity; 832, second air equalizing cavity;

[0042] 9, mesh plate; 91, third opening; 92, surrounding ring; 93, gauze;

[0043] 10, door assembly; 101, door body; 102, second driving member;

[0044] 11, support plate; 111, cushion block; 112, sliding rail;

[0045] 12, connecting block;

[0046] 13, sliding groove. DETAILED DESCRIPTION

[0047] The present application will be described in detail below with reference to the embodiments shown in the drawings. However, the embodiments do not limit the present application, and the structural, method, or functional changes made by those skilled in the art based on the embodiments are included in the protection scope of the present application.

[0048] As Figures 1 to 4 shown in the figure, a solar cell heat treatment device for heat treating solar cells, which comprises a support 1, a furnace body 2 on the support 1, a heating system for delivering heat into the furnace body 2, a waste gas treatment system for treating waste gas in the furnace body 2, and a conveying device 3 for conveying solar cells.

[0049] The conveying device 3 comprises a conveying mechanism 31 arranged through the furnace body 2 and a carrying mechanism 32 for carrying solar cells, the carrying mechanism 32 having at least two layers of carrying parts 321 arranged at intervals along the height direction of the furnace body 2.

[0050] The interval between the two adjacent carrying parts 321 is not less than 2mm, so as to ensure that enough hot air passes between the two adjacent carrying parts 321.

[0051] The conveying mechanism 31 comprises a plurality of roller shafts 311 arranged along the length direction of the furnace body 2 and a first driving member 312 for driving the rotation of the roller shafts 311. The carrying mechanism 32 is arranged above the plurality of roller shafts 311 and moves in the furnace body 2 by the driving of the plurality of roller shafts 311. A silica gel layer can be arranged on the periphery of the roller shafts 311 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 is stably conveyed forward.

[0052] A guide strip 313 is arranged 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 strip 313 can limit the moving range of the carrying mechanism 32, so that the carrying mechanism 32 moves along the length direction of the conveying mechanism 31. The opposite surface end portions of the guide strips 313 on both sides are provided with first inclined surfaces 3131, and the side end portions of the carrying mechanism 32 adjacent to the guide strips 313 are provided with second inclined surfaces 325 matched with the first inclined surfaces 3131. The first inclined surfaces 3131 form an outward opening structure at the end portions of the two guide strips 313, and the second inclined surfaces 325 form an inward closing structure at the bottom of the carrying mechanism 32, so that the bottom of the carrying mechanism 32 easily enters between the two guide strips 313 and moves along the length direction of the conveying mechanism 31.

[0053] The guide strips 313 are made of Teflon or at least have a Teflon layer arranged on the side surfaces close to each other. The friction coefficient of Teflon is low, so that the bottom of the carrying mechanism 32 does not have too much resistance when contacting the guide strips 313.

[0054] The bearing part 321 comprises a lower end plate 323, an upper end plate 322 located above the lower end plate 323, and a plurality of struts 324 respectively connected with the lower end plate 323 and the upper end plate 322. The bearing part 321 is a groove arranged along the height direction of the plurality of struts 324. When the solar cells are placed in the bearing part 321, the surrounding shielding is less, and the hot air in the furnace body 2 can easily reach the upper and lower surfaces of the solar cells, and the solar cells are convenient to take and place.

[0055] The height of the bearing mechanism 32 is greater than the width, and the bearing part 321 can be arranged in multiple in the height direction of the bearing mechanism 32. The height of the inner cavity of the furnace body 2 is greater than the width to accommodate the bearing mechanism 32.

[0056] A plurality of solar cells can be correspondingly arranged in a plurality of bearing parts 321 and longitudinally stacked and placed in the bearing mechanism 32. For the solar panel which is a thin sheet, compared with the flat placement mode, the longitudinal stacking placement greatly reduces the area occupied by the solar panel, so that the solar cell heat treatment equipment can accommodate more solar cells at a time, and the production efficiency is improved.

[0057] Further, the heating system comprises an air inlet air duct 7 and an air outlet air duct 8 respectively arranged on the first side wall and the second side wall opposite to each other of the furnace body 2, and a heat source in pipeline communication with an air inlet port 71 of the air inlet air duct 7. The first side wall and the second side wall both extend in the longitudinal direction. The air inlet air duct 7 and the air outlet air duct 8 are in communication with the inner cavity of the furnace body 2. An air outlet port of the air outlet air duct 8 is in pipeline communication with a waste gas treatment system. The solar cell heat treatment generates harmful substances. The hot air discharged from the air outlet air duct 8 is treated by the waste gas treatment system and then discharged to the outside. The heat source can be a first fan 41 capable of heating air.

[0058] The waste gas treatment system comprises a waste gas treatment device 5 located on the support 1, a discharge fan 43, and a waste gas discharge port 6. An air inlet port of the waste gas treatment device 5 is in pipeline communication with an air outlet port of the air outlet air duct 8. An air inlet port of the discharge fan 43 is in communication with an air outlet port of the waste gas treatment device 5. An air outlet port of the discharge fan 43 is in communication with the waste gas discharge port 6. The hot air flowing out of the air outlet air duct 8 is driven by the discharge fan 43 and discharged from the waste gas discharge port 6 after being treated by the waste gas treatment device 5.

[0059] The hot air provided by the heat source for the air inlet air duct 7 can be uniformly input into the inner cavity of the furnace body 2. The hot air flows in the inner cavity of the furnace body 2 from the first side wall to the second side wall in the transverse direction, and then flows out of the inner cavity of the furnace body 2 from the air outlet air duct 8. Such arrangement is suitable for heat treatment of a plurality of solar cells arranged in the longitudinal direction. The hot air transported by the air inlet air duct 7 into the inner cavity of the furnace body 2 can pass through the gap between the adjacent solar cells and fully contact the upper and lower surfaces of the solar cells, thereby effectively curing the paste printed on the solar cells.

[0060] AsFigures 5 to 8 As shown, the air inlet wind path 7 includes an air inlet 71 located outside the first side wall, a plurality of first openings 72 located inside the first side wall, and a first uniform air duct 73 communicating the air inlet 71 and the plurality of first openings 72. The air inlet 71 can be communicated with a heat source on the device, and the heat source inputs hot air into the air inlet wind path 7. The entering hot air passes through the first uniform air duct 73 and is discharged from the plurality of first openings 72 to uniformly enter the inner cavity of the furnace body 2. The plurality of first openings 72 can be uniformly arranged on the inner side of the first side wall of the furnace body 2 and occupy a sufficient area to ensure that the hot air is blown to all areas in the furnace body 2 without dead angles.

[0061] The first uniform air duct 73 includes a first intermediate air cavity 731 arranged in the middle of the first side wall and communicated with the plurality of first openings 72, and a first uniform air cavity 732 arranged in the first intermediate air cavity 731. The inlet of the first uniform air cavity 732 is the air inlet 71 of the air inlet wind path 7, and the outlet is provided with a plurality of outlets, and the air outlet direction is perpendicular to the axis of the first opening 72. The hot air provided by the heat source enters the inlet of the first uniform air cavity 732 and is discharged from the outlet of the first uniform air cavity 732. The hot air discharged from the outlet of the first uniform air cavity 732 is discharged from the plurality of outlets at a certain air speed, fills the entire first intermediate air cavity 731, and then enters the inner cavity of the furnace body 2 through the plurality of first openings 72 in the first intermediate air cavity 731. This allows the hot air provided by the heat source to uniformly enter the inner cavity of the furnace body 2 from the plurality of first openings 72.

[0062] Similar to the air inlet wind path 7, the air outlet wind path 8 includes an air outlet located outside the second side wall, a plurality of second openings 82 located inside the second side wall, and a second uniform air duct 83 communicating the air outlet and the plurality of second openings 82. The hot air in the furnace body 2 is uniformly discharged from the plurality of second openings 82 to the second uniform air duct 83 and then discharged from the air outlet.

[0063] The second uniform air duct 83 includes a second intermediate air cavity 831 arranged in the middle of the second side wall and communicated with the plurality of second openings 82, and a second uniform air cavity 832 arranged in the second intermediate air cavity 831. The outlet of the second uniform air cavity 832 is the air outlet of the air outlet wind path 8, and the inlet is provided with a plurality of inlets, and the air inlet direction is perpendicular to the axis of the first opening 72. The hot air in the furnace body 2 uniformly enters the second intermediate air cavity 831 from the plurality of second openings 82 at a certain air speed, uniformly enters the second uniform air cavity 832 from the plurality of inlets of the second uniform air cavity 832, and is finally discharged from the air outlet 81.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] like Figures 9 to 12 As shown, the furnace body 2 includes multiple furnace sections connected in sequence. Each furnace section has an inner cavity and an air inlet passage 7 and an air outlet passage 8 that connect the inner cavity. 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 correspondingly provided in multiple ways.

[0069] 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.

[0070] The plurality of furnace sections and the plurality of fans 4, the plurality of exhaust treatment devices 5 and the plurality of exhaust outlets 6 in the plurality of exhaust treatment systems are divided into a plurality of different heat treatment units according to the connection relationship among them, each heat treatment unit comprising one exhaust treatment device 5, one exhaust outlet 6, at least two furnace sections and three fans 4. In the heat treatment unit, the furnace sections comprise a first furnace section 21 and a second furnace section 22.

[0071] As one of the heat treatment units, the first heat treatment unit comprises a first fan 41, a first furnace section 21, a second fan 42, a second furnace section 22, an exhaust treatment device 5, an exhaust fan 43 and an exhaust outlet 6 which are sequentially connected by pipelines.

[0072] The first fan 41 and the second fan 42 each have an inlet and an outlet, the outlet of the first fan 41 is connected by a pipeline with the air inlet 71 of the air inlet wind path 7 of the first furnace section 21, the inlet of the second fan 42 is connected by a pipeline with the air outlet 81 of the air outlet wind path 8 of the first furnace section 21, the outlet of the second fan 42 is connected by a pipeline with the air inlet 71 of the air inlet wind path 7 of the second furnace section 22, the air outlet 81 of the air outlet wind path 8 of the second furnace section 22 is connected by a pipeline with the inlet of the exhaust treatment device 5, the outlet of the exhaust treatment device 5 and the inlet of the exhaust fan 43 are connected by a pipeline, and the outlet of the exhaust fan 43 is connected with the exhaust outlet 6.

[0073] In operation, the hot air delivered by the first fan 41 enters the inner cavity of the first furnace section 21 from the air inlet wind path 7 of the first furnace section 21, and then, under the driving of the second fan 42, is extracted from the air outlet wind path 8 of the first furnace section 21, and the extracted hot air enters the inner cavity of the second furnace section 22 from the air inlet wind path 7 of the second furnace section 22. The hot air in the inner cavities of the first furnace section 21 and the second furnace section 22 can perform heat treatment on the solar cells in the inner cavities of the first furnace section 21 and the second furnace section 22. The hot air in the second furnace section 22 flows to the exhaust treatment device 5 from the air outlet wind path 8 thereof, and after the removal of harmful substances by the exhaust treatment device 5, flows to the exhaust outlet 6 from the outlet of the exhaust treatment device 5 under the driving of the exhaust fan 43 and is discharged. The first furnace section 21 and the second furnace section 22 can share one exhaust treatment device 5.

[0074] As another 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, and the two second furnace sections 22 are connected between the second fan 42 and the exhaust treatment device 5. In this case, one first furnace section 21 and two second furnace sections 22, i.e. three furnace sections, share one exhaust treatment device 5.

[0075] The first heat treatment unit and the second heat treatment unit constitute a solar cell heat treatment system, and each heat treatment unit can work independently, so the device can only comprise one heat treatment unit.

[0076] When the solar cells are subjected to the heat treatment, the solar cells are subjected to the heat treatment in the input section 23, the intermediate section 24 and the output section 25. In the input section 23, the solar cells are preheated from the normal temperature to the temperature required for the heat treatment, in the intermediate section 24, the solar cells are stably maintained at the temperature required for the heat treatment, and in the output section 25, the solar cells are cooled from the temperature required for the heat treatment to the normal temperature. The amount of harmful substances generated in the input section 23 and the output section 25 is less than that generated in the intermediate section 24. Therefore, the two second furnace sections 22 of the second heat treatment unit can be used for the heat treatment of the solar cells in the input section 23 and the output section 25, respectively, and the other furnace sections can be used for the heat treatment of the solar cells in the intermediate section 24. Specifically, the first furnace section 21 of the first heat treatment unit, the second furnace section 22 of the first heat treatment unit and the first furnace section 21 of the second heat treatment unit can be arranged between the two second furnace sections 22 of the second heat treatment unit. The amount of harmful substances generated in the two furnace sections of the first heat treatment unit and the three furnace sections of the second heat treatment unit can be balanced, and the processing capacity of the exhaust gas processing device 5 can be fully utilized. The first heat treatment unit has two furnace sections.

[0077] The inner cavities of the first furnace section 21 of the first heat treatment unit, the second furnace section 22 of the first heat treatment unit and the first furnace section 21 of the second heat treatment unit and the second furnace section 22 of the second heat treatment unit are sequentially communicated to form a furnace body 2 with a long inner cavity. The two second furnace sections 22 of the second heat treatment unit are arranged at the two ends of the furnace body 2 as the input section 23 and the output section 25, respectively, and the other furnace sections are the intermediate section 24. The solar cells can flow continuously in the inner cavity of the furnace body 2.

[0078] Further, the second furnace section 22 of the second heat treatment unit is provided with openable and closable door assemblies 10 on both sides. Before the solar cell panel enters the inner cavity of the input section 23, the door body 101 away from the intermediate section 24 is opened, and the door body 101 close to the intermediate section 24 is closed. After the solar cell panel enters the inner cavity of the input section 23, the door body 101 away from the intermediate section 24 is closed, and the door body 101 close to the intermediate section 24 is opened. The solar cell panel can enter the intermediate section 24 from the input section 23. After the solar cell panel passes through the intermediate section 24 and enters the inner cavity of the output section 25, the door body 101 close to the intermediate section 24 is closed, and the door body 101 away from the intermediate section 24 is opened to allow the solar cell panel to leave the inner cavity of the furnace body 2.

[0079] Due to the blocking of the door assembly 10, when the solar panel enters or leaves the inner cavity of the furnace body 2, the heat of the middle section 24 is not easily dissipated, and the temperature of the middle section 24 can be kept stable, ensuring the curing effect and avoiding harmful gas leakage in the furnace body 2 and saving energy. The middle section 24 is the main working area of the furnace body 2, and the volume of the inner cavity is at least 5 times the volume of the input section 23 or the output section 25.

[0080] As shown in Figures 13 to 15 each door assembly 10 includes a door body 101 moving 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 the corresponding furnace section, which does not cause the flow of gas in the inner cavity of the furnace body 2 compared to the rotating opening or closing mode, ensuring that the 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.

[0081] The door body 101 can move in the height direction, width direction and inclined direction of the corresponding furnace section of the furnace body 2, and only needs to be able to open and close the opening of the end face of the furnace section. In the embodiment, the door body 101 is preferably arranged to move in the width direction of the corresponding furnace section of the furnace body 2.

[0082] Each door body 101 can be arranged in a single piece and moved towards one side under the driving of the second driving member 102 to open and close the furnace section, or can be arranged in multiple pieces and moved towards different directions to open and close the furnace section. The door body 101 can be made of polyurethane, which has good heat insulation, wear resistance and anti-aging effect.

[0083] A support plate 11 is arranged on the side of the door body 101 along the moving direction of the door body 101, and the door body 101 and the support plate 11 are in sliding connection. One end of the support plate 11 in the width direction exceeds the furnace body 2, and the door body 101 can exceed the furnace body 2 when it moves to one side to open. The second driving member 102 is installed on the support plate 11, and the driving end of the second driving member 102 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 a plurality of connecting holes, and the second driving member 102 drives the door body 101 to move through the connecting block 12.

[0084] The support plate 11 is provided with a pad 111 on both sides of the connecting block 12. The pad 111 is arranged 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 pad 111 can be made of elastic material, which can buffer the impact force when the pad 111 contacts the door body 101.

[0085] The top of the door body 101 is slidably connected with the support plate 11 through a slide rail 112, the slide rail 112 is a common commercially available part, which is used between the door body 101 and the support plate 11, so as to ensure the stability of the sliding direction of the door body 101 relative to the support plate 11 and reduce the resistance during sliding.

[0086] The bottom of the door body 101 is slidably arranged in a sliding groove 13 located at the bottom of the furnace body 2, and the sliding groove 13 at the bottom cooperates with the slide rail 112 at the top, so as to ensure that the door body 101 slides reliably and smoothly.

[0087] The furnace body 2 further comprises a control system electrically connected with the second driving member 102, so as to control that when one of the door bodies 101 at the same furnace section is opened, the other door body 101 at the same furnace section is closed, thereby preventing the heat loss in the furnace body 2.

[0088] As shown in Figure 16 A plurality of waste gas treatment devices 5 are arranged at the bottom of the support frame 1, and a plurality of fans 4 are arranged between the furnace body 2 and the waste gas treatment devices 5, the plurality of fans 4 are arranged below the furnace body 2, so as to facilitate the pipeline communication with the air inlet air duct 7 and the air outlet air duct 8 located at the opposite sides of the furnace body 2, the waste gas treatment devices 5 are arranged at the bottom of the support frame 1, so as to facilitate the pipeline communication with the fans 4, in addition, the waste gas treatment devices 5 have a certain weight, and are arranged at the bottom of the support frame 1, so as to facilitate the installation and maintenance, and make the gravity center of the equipment lower, so that the equipment is placed more stably. The waste gas discharge port 6 is arranged at the top of the support frame 1, and the hot gas treated by the waste gas treatment devices 5 is discharged above the support frame 1, which does not affect the equipment and personnel operation.

[0089] The plurality of waste gas treatment devices 5 are located directly below the furnace body 2 and are arranged in sequence along the length direction of the furnace body 2, and the plurality of fans 4 are also located directly below the furnace body 2 and are arranged in sequence along the length direction of the furnace body 2, the weights of the furnace body 2, the plurality of fans 4 and the plurality of waste gas treatment devices 5 are evenly distributed on the support frame 1, and the equipment layout is also relatively compact.

[0090] The waste gas treatment device 5 is a combustion tower, which is suitable for treating the organic waste gas generated in the solar cell heat treatment process.

[0091] In summary, the present application has at least the following advantages:

[0092] 1. A plurality of solar cell panels can be placed in the furnace body 2 in a longitudinal direction, compared with the existing equipment, the furnace body 2 can accommodate more solar cells at a time, and the production efficiency is improved.

[0093] 2. The air inlet air duct 7 and the air outlet air duct 8 arranged at the opposite first side wall and the second side wall of the furnace body 2 can effectively solidify the slurry on the plurality of solar cells placed in the longitudinal direction, and the temperature in the furnace body 2 is uniform.

[0094] 3. The door assembly 10 can seal the communication between the input section 23 or the output section 25 and the intermediate section 24, prevent the loss of heat from the inner cavity of the furnace 2 before the solar cells enter or leave the inner cavity of the furnace 2, ensure the stability of the temperature inside the furnace 2, and avoid the leakage of harmful substances and the waste of energy.

[0095] 4. The plurality of furnace sections are connected in series or in parallel, and share one exhaust gas treatment device 5, which saves the cost and volume of the equipment.

[0096] 5. The exhaust gas treatment device 5 is placed at the bottom of the support 1, which is easy to install and maintain, and makes the center of gravity of the equipment lower, so that the equipment is placed more stably.

[0097] The terms such as "upper", "lower", "left", "right", "front", "back", etc. used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one feature relative to another feature as shown in the drawings. It can be understood that the terms of spatial relative positions can be intended to include different orientations other than the orientations shown in the drawings, and should not be construed as limiting the claims. In addition, the descriptive word "horizontal" used herein is not completely equivalent to along the direction perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0098] It should be understood that although the present specification is described in terms of embodiments, each embodiment does not contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0099] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A solar cell heat treatment apparatus, characterized by, The device comprises a support, a furnace body on the support, a heating system for delivering heat into the furnace body, a waste gas treatment system for treating waste gas in the furnace body, and a conveying device for conveying solar cells; the conveying device comprises a conveying mechanism arranged through the furnace body and a carrying mechanism for carrying solar cells, the carrying mechanism has at least two layers of carrying portions arranged at intervals in the height direction of the furnace body, and the interval between adjacent two carrying portions is not less than 2 mm; The conveying mechanism comprises a plurality of roller shafts arranged in the length direction of the furnace body and a driving member for driving the roller shafts to rotate, and guide strips are arranged above the conveying mechanism on both sides of the carrying mechanism, the opposite surface ends of the guide strips on both sides are provided with first inclined surfaces, and the side ends of the carrying mechanism adjacent to the guide strips are provided with second inclined surfaces matched with the first inclined surfaces. The heating system comprises an air inlet air duct and an air outlet air duct arranged on the opposite first side wall and second side wall of the furnace body respectively, a heat source in pipeline communication with the air inlet of the air inlet air duct, the air inlet air duct and the air outlet air duct being in communication with the inner cavity of the furnace body, the air outlet air duct being in pipeline communication with the waste gas treatment system, and the air inlet air duct comprising an air inlet in communication with the heat source outside the first side wall, a plurality of first openings inside the first side wall, and a first air uniformizing duct in communication with the air inlet and the plurality of first openings.

2. The solar cell thermal processing apparatus of claim 1, wherein, The furnace body comprises a plurality of furnace sections connected in sequence, each of the furnace sections having the inner cavity, the air inlet air duct and the air outlet air duct in communication with the inner cavity.

3. The solar cell thermal processing apparatus of claim 1, wherein, The guide strips are made of Teflon material.

4. The solar cell thermal processing apparatus of claim 1, wherein, The height of the carrying mechanism is greater than its width, and the furnace body has an inner cavity, the height of the inner cavity being also greater than its width.

5. The solar cell thermal processing apparatus of claim 1, wherein, The carrying mechanism comprises a lower end plate, an upper end plate above the lower end plate, and a plurality of support columns connected to the lower end plate and the upper end plate respectively, and the carrying portions are grooves arranged at intervals in the height direction of the support columns.

6. The solar cell heat treatment apparatus according to any one of claims 1 to 5, wherein The waste gas treatment system comprises a waste gas treatment device on the support, an exhaust fan, and a waste gas discharge port, the air outlet of the air outlet air duct is in pipeline communication with the inlet of the waste gas treatment device, the outlet of the waste gas treatment device is in pipeline communication with the inlet of the exhaust fan, and the outlet of the exhaust fan is in pipeline communication with the waste gas discharge port.

7. The solar cell thermal processing apparatus of claim 6, wherein, The waste gas treatment device is arranged at the bottom of the support.

8. The solar cell thermal processing apparatus of claim 1, wherein, The first air uniformizing duct comprises a first intermediate air cavity in communication with the plurality of first openings arranged in the middle of the first side wall, and a first air uniformizing chamber arranged in the first intermediate air cavity, the inlet of the first air uniformizing chamber is the air inlet of the air inlet air duct, the outlet of the first air uniformizing chamber is provided with a plurality of outlets, and the air outlet direction is perpendicular to the axis of the first openings.

9. The solar cell thermal processing apparatus of claim 8, wherein, The air outlet air duct comprises a plurality of second openings inside the second side wall, an air outlet outside the second side wall, and a second air uniformizing duct in communication with the plurality of second openings and the air outlet.

10. The solar cell thermal processing apparatus of claim 9, wherein, The second uniform air duct comprises a second intermediate air cavity communicated with the plurality of second openings and arranged in the middle of the second side wall, and a second uniform air cavity arranged in the second intermediate air cavity, the second uniform air cavity being an exhaust air path outlet, the inlet of the second uniform air cavity being provided with a plurality of inlets, and the air inlet direction being perpendicular to the axis of the second opening.

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