Solar cell heat treatment system and solar cell heat treatment equipment

Abstract

The present invention discloses a solar cell heat treatment system and solar cell heat treatment equipment, comprising at least one heat treatment unit, the heat treatment unit comprising a first fan, a first furnace section, a second fan, a second furnace section, an exhaust gas treatment device, an exhaust fan and an exhaust gas discharge port, which are sequentially connected through pipelines, wherein the first fan and the second fan have an inlet and an outlet respectively, the first furnace section and the second furnace section have an inner cavity, an air inlet duct and an exhaust duct connected to the inner cavity respectively, the outlet of the first fan is connected to the air inlet duct pipeline of the first furnace section, the inlet of the second fan is connected to the exhaust duct pipeline of the first furnace section, the outlet of the second fan is connected to the air inlet duct pipeline of the second furnace section, and the exhaust duct of the second furnace section is connected to the exhaust gas treatment device pipeline. In the present invention, multiple heat treatment zones are connected in series or in parallel, and share one exhaust gas treatment device, which saves the cost of the equipment and the volume required for the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of solar cell production, in particular to a solar cell heat treatment system and solar cell heat treatment equipment. Background Art

[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 existing technology, solar cells are often used to convert the radiation energy of the sun into usable electrical energy. At present, heat treatment equipment is needed in the production process of solar cells. For example, when it is necessary to solidify the conductive paste printed on the silicon wafer of the solar cell, the heat treatment equipment can be used to dry and sinter the conductive paste to solidify and form the electrode grid line.

[0003] When heat treating solar cells, harmful substances will be generated, so the solar cell heat treatment equipment will be equipped with a waste gas treatment device. The existing solar cell heat treatment equipment, the solar cell heat treatment system may include multiple furnace sections as heat treatment areas, each furnace section is equipped with a waste gas treatment device, the cost is relatively high, and the equipment is also large. Summary of the invention

[0004] An object of the present invention is to provide a solar cell heat treatment system and a solar cell heat treatment device, which require a small number of exhaust gas treatment devices.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a solar cell heat treatment system, comprising at least one heat treatment unit, the heat treatment unit comprising a first fan, a first furnace section, a second fan, a second furnace section, an exhaust gas treatment device, an exhaust fan and an exhaust gas exhaust port which are sequentially connected through pipelines, wherein the first fan and the second fan have an inlet and an outlet respectively, the first furnace section and the second furnace section have an inner cavity, an air inlet path and an exhaust path connected to the inner cavity respectively, the outlet of the first fan is connected to the air inlet path pipeline of the first furnace section, the inlet of the second fan is connected to the exhaust path pipeline of the first furnace section, the outlet of the second fan is connected to the air inlet path pipeline of the second furnace section, the outlet of the second fan is connected to the air inlet path pipeline of the second furnace section, and the exhaust path of the second furnace section is connected to the exhaust gas treatment device pipeline.

[0006] As a further improvement of the present invention, the solar cell heat treatment system comprises a first heat treatment unit, and the number of the second furnace section of the first heat treatment unit is one.

[0007] As a further improvement of the present invention, the solar cell heat treatment system includes a second heat treatment unit, the second heat treatment unit has two second furnace sections, and the two second furnace sections are connected in parallel between the second fan and the exhaust gas treatment device.

[0008] As a further improvement of the present invention, the first furnace section and the second furnace section of the first heat treatment unit and the first furnace section of the second heat treatment unit are all arranged between the two second furnace sections of the second heat treatment unit.

[0009] As a further improvement of the present invention, two first heat treatment units are provided.

[0010] As a further improvement of the present invention, the inner cavities of the first furnace section and the second furnace section of the first heat treatment unit and the first furnace section and the second furnace section of the second heat treatment unit are connected in sequence, and door assemblies that can be opened or closed are arranged on both sides of the second furnace section of the second heat treatment unit.

[0011] As a further improvement of the present invention, the air inlet duct and the air exhaust duct are respectively arranged on two opposite side walls of the first furnace section or the second furnace section where they are located.

[0012] As a further improvement of the present invention, the air inlet path includes an air inlet located on the outside of the first side wall, a plurality of first openings located on the inside of the first side wall, and a first air distribution duct connecting the air inlet and the plurality of first openings.

[0013] 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.

[0014] The present invention further provides a solar cell heat treatment device, comprising the above-mentioned solar cell heat treatment system.

[0015] Beneficial effects of the present invention:

[0016] In the present invention, a plurality of furnace sections are connected in series or in parallel to share one exhaust gas treatment device, thereby saving the cost and volume of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a first heat treatment unit of a solar cell heat treatment device provided by the present invention;

[0018] Figure 2 A schematic structural diagram of a second heat treatment unit of a solar cell heat treatment device provided by the present invention;

[0019] Figure 3 A schematic diagram of the structure of a heat treatment system in a solar cell heat treatment device provided for an application.

[0020] Figure 4A schematic diagram of the front view of a solar cell heat treatment device provided by the present invention;

[0021] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the middle furnace body;

[0022] Figure 6 for Figure 4 A perspective structural diagram of one side of a furnace section of the middle furnace body;

[0023] Figure 7 for Figure 6 A schematic diagram of the structure from the other side of the middle furnace section;

[0024] Figure 8 for Figure 6 Schematic diagram of the structure of the middle mesh plate and the gauze;

[0025] Fig. 9 for Figure 4 The structural diagram of the middle furnace body;

[0026] Fig.10 for Fig. 9 The structural diagram of the input section or output section corresponding to the local furnace section;

[0027] Fig.11 for Fig. 9 A schematic diagram of the front view of the middle furnace body, wherein the door body located at the front is hidden;

[0028] Fig.12 for Fig. 9 A schematic diagram of the structure of another part of the furnace section corresponding to the input section or output section;

[0029] Fig.13 A schematic structural diagram of a solar cell heat treatment device provided by the present invention;

[0030] Fig.14 A schematic diagram of a partial structure of a solar cell heat treatment device provided by the present invention;

[0031] Fig.15 for Fig.13 A schematic diagram of the structure of a supporting mechanism loaded with solar cells;

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

[0033] In the figure:

[0034] 1. Bracket;

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

[0036] 3. Conveying device; 31. Conveying mechanism; 311. Roller; 312. First driving member; 313. Guide bar; 3131. First inclined plane; 32. Carrying mechanism; 321. Carrying 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 outlet;

[0040] 7. air inlet path; 71. air inlet; 72. first opening; 73. first air distribution channel; 731. first intermediate air cavity; 732. first air distribution cavity;

[0041] 8. Exhaust air path; 81. Exhaust port; 82. Second opening; 83. Second air distribution air duct; 831. Second intermediate air cavity; 832. Second air distribution cavity;

[0042] 9. mesh plate; 91. third opening; 92. circle; 93. gauze;

[0043] 10. Door assembly; 101. Door body; 102. Second driving member;

[0044] 11. support plate; 111. cushion block; 112. slide rail;

[0045] 12. Connecting block;

[0046] 13. Sliding groove. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0048] like Figures 1 to 4 As shown, a solar cell heat treatment equipment includes a solar cell heat treatment system, wherein the solar cell heat treatment system includes at least one heat treatment unit, and the heat treatment unit includes a first fan 41, a first furnace section 21, a second fan 42, a second furnace section 22, an exhaust gas treatment device 5, an exhaust fan 43 and an exhaust gas exhaust port 6 which are sequentially connected through pipelines.

[0049] Among them, the first fan 41 and the second fan 42 have an inlet and an outlet respectively, the first furnace section 21 and the second furnace section 22 have an inner cavity, an air inlet passage 7 and an exhaust passage 8 connected to the inner cavity respectively, the outlet of the first fan 41 is connected to the air inlet passage 7 of the first furnace section 21, the inlet of the second fan 42 is connected to the exhaust passage 8 of the first furnace section 21, the outlet of the second fan 42 is connected to the air inlet passage 7 of the second furnace section 22, the exhaust port 81 of the exhaust passage 8 of the second furnace section 22 is connected to the exhaust gas treatment device 5 pipeline, the outlet of the exhaust gas treatment device 5 is connected to the inlet pipeline of the exhaust fan 43, and the outlet of the exhaust fan 43 is connected to the exhaust gas discharge port 6.

[0050] During operation, the hot air delivered by the first fan 41 enters the inner cavity of the first furnace section 21 from the air inlet passage 7 of the first furnace section 21, and then, driven by the second fan 42, is extracted from the exhaust air passage 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 passage 7 of the second furnace section 22. The hot air in the inner cavity of the first furnace section 21 and the inner cavity of the second furnace section 22 can perform heat treatment on the solar cells in the inner cavity of the first furnace section 21 and the second furnace section 22. The hot air in the second furnace section 22 flows from its exhaust air passage 8 to the exhaust gas treatment device 5. After the exhaust gas treatment device 5 removes the harmful substances generated during the heat treatment of the solar cells, it flows from the outlet of the exhaust gas treatment device 5 to the exhaust gas discharge port 6 driven by the exhaust fan 43 and is discharged. The first furnace section 21 and the second furnace section 22 can share one exhaust gas treatment device 5.

[0051] Specifically, the solar cell heat treatment system includes a first heat treatment unit. The first heat treatment unit has one second furnace section 22 . The first furnace section 21 and the second furnace section 22 , a total of two furnace sections, share one exhaust gas treatment device 5 .

[0052] Furthermore, the solar cell heat treatment system includes a second heat treatment unit. The second heat treatment unit is different 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 in parallel between the second fan 42 and the exhaust gas treatment device 5. In this case, a total of three furnace sections, including one first furnace section 21 and two second furnace sections 22, share one exhaust gas treatment device 5.

[0053] When the solar cell is heat treated, it is divided into an input section 23, an intermediate section 24 and an input section 23. In the input section 23, the solar cell is preheated from room temperature to the temperature required for heat treatment. In the intermediate section 24, the solar cell is stably at the temperature required for heat treatment. In the output section 25, the solar cell is cooled from the temperature required for heat treatment to room temperature. In the two sections of the input section 23 and the output section 25, the amount of harmful substances produced by the solar cell will be less than the amount of harmful substances produced by the solar cell 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 cell in the input section 23 and the output section 25 respectively, and the other furnace sections are used to heat treat the solar cell in the intermediate section 24. Specifically, it can be set as follows: the first furnace section 21, 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 set 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 maintain a balance, and the processing capacity of the exhaust gas treatment device 5 is fully utilized. In this embodiment, two first heat treatment units are provided, and the equipment has a total of furnace sections.

[0054] like Fig. 9 As shown, the first furnace section 21 and the second furnace section 22 of the first heat treatment unit and the inner cavities of 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 with a longer inner cavity, wherein the two second furnace sections 22 of the second heat treatment unit are respectively used as the input section 23 and the output section 25 at the two ends of the furnace body 2, and the rest are the middle sections 24, so that the solar cells can flow continuously in the inner cavity of the furnace body 2.

[0055] 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, so that before the solar cell 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 opened, and the door assembly 10 close to the middle section 24 is closed; after the solar cell 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 close to the end of the middle section 24 is opened, so that the solar cell panel can enter the middle section 24 from the input section 23; after the solar cell panel enters the inner cavity of the output section 25 through the middle section 24, the door assembly 10 at the end of the output section 25 close to the middle section 24 is closed, and the door assembly 10 at the end away from the middle section 24 is opened to allow the solar cell panel to leave the inner cavity of the furnace body 2.

[0056] Due to the obstruction 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 easy to dissipate, and the temperature of the middle section 24 can be kept stable, ensuring the curing effect, and avoiding the leakage of harmful gases in the furnace body 2 and saving energy. The middle section 24 is the main working area of ​​the furnace body 2, and its inner cavity volume is at least 5 times the volume of the input section 23 or the output section 25.

[0057] like Figures 10 to 12 As shown, each door assembly 10 includes a door body 101 that moves along the end surface of the furnace section corresponding to the furnace body 2 where it is located, 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 and moves along the end surface of the furnace section corresponding to it. Compared with the method of rotating to open or close, it will not drive the flow of gas in the inner cavity of the furnace body 2, ensuring that heat will not be 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.

[0058] The door body 101 can move along the height direction, width direction and inclination direction of the furnace section corresponding to the furnace body 2 where it is located, and it only needs to be able to open and close the opening on the end face of its furnace section. In the present embodiment, the door body 101 is preferably arranged to be movable along the width direction of the furnace section corresponding to the furnace body 2 where it is located.

[0059] Each door body 101 can be a single piece, and under the drive of the second driving member 102, it moves toward one side to open and close its furnace section, or it can be a plurality of pieces, and move toward different directions 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.

[0060] A support plate 11 is provided on the top wall of the furnace body 2 at 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. One end of the support plate 11 in the width direction exceeds the furnace body 2. When the door body 101 moves to one side and opens, it can exceed the furnace body 2. The 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 a plurality of connecting holes. The second driving member 102 drives the door body 101 to move through the connecting block 12.

[0061] The support plate 11 is provided with cushion blocks 111 on both sides of the connection block 12. The cushion blocks 111 are arranged in the moving direction of the connection block 12 and can contact the connection block 12. By controlling the installation positions of the two cushion blocks 111, the moving range of the connection block 12 can be limited, and the moving range of the door body 101 is also limited. In addition, the cushion blocks 111 can be made of elastic material to buffer the impact force when the cushion blocks 111 contact the door body 101.

[0062] 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 reduce the resistance during sliding.

[0063] 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 located at the bottom cooperates with the sliding rail 112 at the top to ensure that the door body 101 slides reliably and smoothly.

[0064] The furnace body 2 also includes a control system, which is electrically connected to the second driving member 102 to control the door body 101 at one end of the same furnace section to be opened while the door body 101 at the other end is closed to prevent heat loss in the furnace body 2.

[0065] like Figures 5 to 8 As shown, the air inlet passage 7 and the air exhaust passage 8 are respectively arranged on the first side wall and the second side wall opposite to the first furnace section 21 or the second furnace section 22 where they are located. The first side wall and the second side wall both extend in the longitudinal direction. The hot air provided by the first fan 41 to the air inlet passage 7 can be uniformly input into the inner cavity of the furnace body 2. In the inner cavity of the furnace body 2, the hot air flows horizontally from the first side wall toward the second side wall, and then flows out of the inner cavity of the furnace body 2 from the air exhaust passage 8. Such an arrangement is suitable for heat treatment of a plurality of solar cells spaced apart in the longitudinal direction. The hot air transported to the inner cavity of the furnace body 2 by the air inlet passage 7 can pass through the gaps between adjacent solar cells and fully contact the upper and lower surfaces of the solar cells, thereby effectively solidifying the slurry printed on the solar cells.

[0066] The air inlet path 7 includes an air inlet 71 located on the outside of the first side wall, a plurality of first openings 72 located on the inside of the first side wall, and a first air duct 73 connecting the air inlet 71 and the plurality of first openings 72. The first fan 41 can be used as a heat source, and the air inlet 71 can be connected to the heat source on the device. The heat source inputs hot air into the air inlet path 7, and the hot air enters the first air duct 73, is discharged from the plurality of first openings 72, and evenly enters the inner cavity of the furnace body 2. The plurality of first openings 72 can be evenly opened on the inside of the first side wall of the furnace body 2, occupying a sufficient area to ensure that the air is blown to all areas in the furnace body 2 without dead angles.

[0067] The first air duct 73 includes a first intermediate air cavity 731 disposed in the middle of the first side wall and connected to the plurality of first openings 72, and a first air duct 732 disposed in the first intermediate air cavity 731. The inlet of the first air duct 732 is the air inlet 71 of the air inlet 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 from the inlet of the first air duct 732 and is then discharged from the outlet of the first air duct 732. The hot air discharged from the outlet of the first air duct 732 is discharged from the plurality of outlets at a certain wind speed, filling the entire first intermediate air cavity 731, and then enters the inner cavity of the furnace body 2 from the first intermediate air cavity 731 through the plurality of first openings 72, so that the hot air provided by the heat source can evenly enter the inner cavity of the furnace body 2 from the plurality of first openings 72.

[0068] Similar to the air inlet passage 7, the air exhaust passage 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 air duct 83 connecting the air outlet and the plurality of second openings 82. The hot air in the furnace body 2 is evenly discharged from the plurality of second openings 82 to the second air duct 83, and then discharged from the air outlet.

[0069] The second air duct 83 includes a second intermediate air cavity 831 disposed in the middle of the second side wall and connected to the plurality of second openings 82, and a second air duct 832 disposed in the first intermediate air cavity 731. The outlet of the second air duct 832 is the outlet of the exhaust air path 8. There are a plurality of inlets, and the air inlet direction is perpendicular to the axis of the first opening 72. At a certain wind speed, the hot air in the furnace body 2 evenly enters the second intermediate air cavity 831 from the plurality of second openings 82, and then evenly enters the second air duct 832 from the plurality of inlets of the second air duct 832, and finally is discharged from the exhaust port 81.

[0070] The first air equalizing chamber 732 and the second air equalizing chamber 832 are H-shaped and multiple air equalizing chambers are evenly arranged in the first intermediate air chamber 731 and the second intermediate air chamber 831 respectively. The H-shaped first air equalizing chamber 732 or the second air equalizing chamber 832 can be vertically arranged in the corresponding first intermediate air chamber 731 or the second intermediate air chamber 831, and the outlet of the first air equalizing chamber 732 or the inlet of the second air equalizing chamber 832 is through-opened on both sides of the H-shape. This arrangement allows the outlet of the first air equalizing chamber 732 or the inlet of the second air equalizing chamber 832 to be evenly distributed along the length and width directions of the first air equalizing chamber 732 or the second air equalizing chamber 832, thereby achieving a good air equalization effect.

[0071] Two or four first air equalizing cavities 732 and second air equalizing cavities 832 are respectively arranged in the first intermediate air cavity 731 and the second intermediate air cavity 831, and the specific number depends on the space of the first air equalizing cavity 732 or the second air equalizing cavity 832, so that the outlet of the first air equalizing cavity 732 or the inlet of the second air equalizing cavity 832 is evenly distributed in the first air equalizing cavity 732 or the second air equalizing cavity 832.

[0072] The second side wall of the furnace body 2 is provided with a hollow mesh plate 9, a first insulation layer 26 is provided on the outer side of the mesh plate 9, and a second insulation layer 27 is provided on the top of the furnace body 2. The mesh plate 9, the first insulation layer 26 and the second insulation layer 27 form three side walls of the second intermediate air cavity 831, and the other side walls of the second intermediate air cavity 831 are also closed. The insulation layer has the effect of keeping the furnace body 2 warm. A second opening 82 is provided on the side of the mesh plate 9 close to the inner cavity of the furnace body 2, and a third opening 91 is provided 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 in turn to reach the second intermediate air cavity 831, and the airflow is more uniform.

[0073] A raised circle 92 is provided on one side of the mesh plate 9 close to the inner cavity of the furnace body 2, and a plurality of second openings 82 are provided in the area enclosed by the bottom of the circle 92. The top of the circle 92 is covered with a gauze 93. The air in the furnace body 2 must first pass through the gauze 93 before reaching the plurality of second openings 82, and the airflow is more uniform.

[0074] like Figures 13 to 16 As shown, the furnace body 2 is arranged on a bracket 1 of a solar cell heat treatment device, and a conveying device 3 for conveying solar cells is also arranged on the bracket 1. The conveying device 3 includes a conveying mechanism 31 arranged throughout the furnace body 2 and a supporting mechanism 32 for supporting the solar cells. The supporting mechanism 32 has at least two layers of supporting parts 321 arranged at intervals along the height direction of the furnace body 2.

[0075] The distance between two adjacent bearing parts 321 is not less than 2 mm to ensure that enough hot air passes between the two adjacent bearing parts 321.

[0076] The conveying mechanism 31 includes a plurality of rollers 311 arranged along the length direction of the furnace body 2 and a first driving member 312 for driving the rollers 311 to rotate. The bearing mechanism 32 is arranged above the plurality of rollers 311 and moves in the furnace body 2 by the driving of the plurality of rollers 311. A silica gel layer may be arranged on the periphery of the rollers 311 to serve as a buffer between the bearing mechanism 32 and the conveying mechanism 31 and to increase the friction between the bearing mechanism 32 and the conveying mechanism 31 so that the bearing mechanism 32 is smoothly conveyed forward.

[0077] Guide bars 313 are provided on both sides of the supporting mechanism 32 above the conveying mechanism 31. When the supporting mechanism 32 is driven to move by the conveying mechanism 31, the guide bars 313 can limit the movement range of the supporting mechanism 32, allowing the supporting mechanism 32 to move along the length direction of the conveying mechanism 31. The opposite surface ends of the guide bars 313 on both sides are provided with first inclined surfaces 3131, and the side ends of the adjacent guide bars 313 at the bottom of the supporting mechanism 32 are provided with second inclined surfaces 325 that match the first inclined surfaces 3131. The first inclined surface 3131 allows the two guide bars 313 to form an outwardly open structure at the ends, and the second inclined surface 325 allows the bottom of the supporting mechanism 32 to form an inwardly closed structure, so that the bottom of the supporting mechanism 32 can easily enter between the two guide bars 313 and move along the length direction of the conveying mechanism 31.

[0078] The guide strip 313 is made of Teflon or at least a Teflon layer is provided on the adjacent side. Teflon has a low friction coefficient, and there will not be much resistance when the bottom of the bearing mechanism 32 contacts the guide strip 313.

[0079] The bearing portion 321 includes a lower end plate 323, an upper end plate 322 located above the lower end plate 323, and a plurality of pillars 324 respectively connected to the lower end plate 323 and the upper end plate 322 at both ends. The bearing portion 321 is a groove spaced apart along the height direction of the plurality of pillars 324. When the solar cell is placed on the bearing portion 321, there is less obstruction on all sides, and the hot air in the furnace body 2 can easily reach the upper and lower surfaces of the solar cell, which is also convenient for taking and placing the solar cell.

[0080] The height of the supporting mechanism 32 is greater than its width. A plurality of supporting parts 321 can be arranged in a height direction of the supporting mechanism 32 . The height of the inner cavity of the furnace body 2 is greater than its width to accommodate the supporting mechanism 32 .

[0081] A plurality of solar cells can be correspondingly arranged in a plurality of carrying parts 321, and stacked in the longitudinal direction in the carrying mechanism 32. For thin sheet items such as solar panels, stacking in the longitudinal direction greatly reduces the area occupied by the solar panels compared to the flat laying method, so that the solar cell heat treatment equipment can accommodate more solar cells at a time, thereby improving production efficiency.

[0082] A plurality of exhaust gas treatment devices 5 are arranged at the bottom of the bracket 1, a plurality of fans 4 are arranged between the furnace body 2 and the exhaust gas treatment devices 5, and a plurality of fans 4 are arranged below the furnace body 2, so as to facilitate the pipe connection with the air inlet duct 7 and the exhaust duct 8 located on the opposite sides of the furnace body 2. The exhaust gas treatment device 5 is arranged at the bottom of the bracket 1, so as to facilitate the pipe connection with the fan 4. In addition, the exhaust gas treatment device 5 has a certain weight device, which is arranged at the bottom of the bracket 1 for easy installation and maintenance, and makes the center of gravity of the equipment lower, so that the equipment can be placed more stably. The exhaust gas discharge port 6 is arranged at the top of the bracket 1, and the hot gas treated by the exhaust gas treatment device 5 is discharged above the bracket 1, which does not affect the equipment and personnel operations.

[0083] A plurality of exhaust 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. A 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 weight of the furnace body 2, the plurality of fans 4 and the plurality of exhaust gas treatment devices 5 are evenly distributed on the bracket 1, and the equipment layout is also relatively compact.

[0084] The waste gas treatment device 5 is a combustion tower, which is suitable for treating the organic waste gas generated during the heat treatment of solar cells.

[0085] In summary, the present invention has at least the following advantages:

[0086] 1. The present invention connects multiple furnace sections in series or in parallel to share one exhaust gas treatment device 5, thereby saving equipment cost and equipment volume.

[0087] 2. The door assembly 10 can close the connection between the input section 23 or the output section 25 and the middle section 24. Before the solar cell enters or leaves the inner cavity of the furnace body 2, it prevents the loss of heat from the inner cavity of the furnace body 2, ensures the stability of the internal temperature of the furnace body 2, and avoids the leakage of harmful substances and the waste of energy.

[0088] 3. The air inlet passage 7 and the air exhaust passage 8 respectively arranged on the first side wall and the second side wall opposite to the furnace body 2 can effectively solidify the slurry on a plurality of solar cells spaced apart in the longitudinal direction, and the temperature in the furnace body 2 is uniform.

[0089] 4. Multiple solar cell panels can be placed in the furnace body 2 at intervals along the longitudinal direction. Compared with existing equipment, the furnace body 2 can accommodate more solar cells at one time, thereby improving production efficiency.

[0090] 5. The exhaust gas treatment device 5 is placed at the bottom of the bracket 1, which is easy to install and maintain, and makes the center of gravity of the equipment lower, making the equipment more stable.

[0091] The terms used herein, such as "upper", "lower", "left", "right", "front", "back", etc., which indicate relative spatial positions, are used for the purpose of convenience to describe the relationship between one feature and another feature as shown in the accompanying drawings. It is understood that, depending on the placement of the product, the terms of relative spatial positions may be intended to include different orientations other than those shown in the drawings, and should not be construed as limitations on the claims. In addition, the descriptor "horizontal" used herein is not completely equivalent to being perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0092] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0093] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A solar cell heat treatment system, characterized in that: The invention comprises at least one heat treatment unit, wherein the heat treatment unit comprises a first fan, a first furnace section, a second fan, a second furnace section, an exhaust gas treatment device, an exhaust fan and an exhaust gas discharge port which are sequentially connected through pipelines, wherein the first fan and the second fan respectively have an inlet and an outlet, the first furnace section and the second furnace section respectively have an inner cavity, an air inlet passage and an exhaust passage connected to the inner cavity, the outlet of the first fan is connected to the air inlet passage pipeline of the first furnace section, the inlet of the second fan is connected to the exhaust passage pipeline of the first furnace section, the outlet of the second fan is connected to the air inlet passage pipeline of the second furnace section, the exhaust passage of the second furnace section is connected to the exhaust gas treatment device pipeline; The solar cell heat treatment system comprises a first heat treatment unit, wherein the second furnace section of the first heat treatment unit is provided as one; The solar cell heat treatment system comprises a second heat treatment unit, wherein the second furnace sections of the second heat treatment unit are provided with two, and the two second furnace sections are connected in parallel between the second fan and the exhaust gas treatment device; The first furnace section and the second furnace section of the first heat treatment unit and the first furnace section of the second heat treatment unit are all arranged between the two second furnace sections of the second heat treatment unit.

2. The solar cell heat treatment system according to claim 1, characterized in that: There are two first heat treatment units.

3. The solar cell heat treatment system according to claim 2, characterized in that: The inner cavities of the first furnace section and the second furnace section of the first heat treatment unit and the first furnace section and the second furnace section of the second heat treatment unit are connected in sequence, and door assemblies that can be opened or closed are arranged on both sides of the second furnace section of the second heat treatment unit.

4. The solar cell heat treatment system according to any one of claims 1 to 3, characterized in that: The air inlet passage and the air exhaust passage are respectively arranged on the first side wall and the second side wall opposite to the first furnace section or the second furnace section where they are located.

5. The solar cell heat treatment system according to claim 4, characterized in that: The air inlet path includes an air inlet located on the outer side of the first side wall, 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.

6. The solar cell heat treatment system according to claim 5, characterized in that: 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.

7. A solar cell heat treatment device, characterized in that: A solar cell heat treatment system comprising any one of claims 1 to 6.

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