A solar cell heat treatment device

Abstract

The present invention discloses a solar cell heat treatment device, comprising a support, a furnace body located on the upper layer of the support, and a conveying mechanism located at the bottom of the furnace body, a plurality of air inlet and exhaust air paths are respectively arranged on opposite sides of the furnace body, the outlet of the air inlet and the inlet of the exhaust air path are both connected to the inner cavity of the furnace body, the inlet of the air inlet and the outlet of the exhaust air path are both connected to a fan through a pipeline; an exhaust gas treatment device is arranged between the outlet of at least one exhaust air path and the fan connected thereto, the exhaust gas treatment device is arranged at the bottom of the support, and a plurality of fans are arranged between the furnace body and the exhaust gas treatment device. In the present invention, the furnace body can accommodate more solar cells at one time, thereby improving production efficiency. In addition, the exhaust gas treatment device is placed at the bottom of the support, which is easy to install and maintain, and makes the center of gravity of the equipment lower, so that the equipment can be placed more stably.

Description

Technical Field

[0001] The invention relates to the technical field of solar cell production, in particular to a solar cell heat treatment device. 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 commonly used to convert solar radiation energy into usable electrical energy. At present, in the production process of solar cells, curing equipment is needed to cure the conductive paste printed on the solar cell silicon wafer to form electrode grid lines.

[0003] The existing solar cell heat treatment equipment includes a furnace body for accommodating solar cells, a conveying mechanism for conveying solar cells, a heating lamp tube for providing heat to the furnace body, an exhaust air duct for extracting the waste gas generated by curing in the furnace body, and a waste gas treatment device for treating the waste gas. Generally, two heat-releasing lamp tubes are provided, which are respectively located on the upper and lower sides of the conveying mechanism to heat the upper and lower surfaces of the solar cell panels on the conveying mechanism. The exhaust air duct is arranged below the conveying mechanism, and the waste gas treatment device is arranged on the top of the equipment. The existing curing equipment has the following disadvantages: 1. The heating lamp tube heats the solar cell by thermal radiation, so the heating lamp tube can only be arranged on the upper and lower sides of the single-layer solar cell panel so as to illuminate the upper and lower surfaces of the sheet-shaped solar cell panel. The solar cell is arranged in a single layer, and at most a few rows are arranged side by side, and the production efficiency is not high; 2. The waste gas treatment device is arranged on the top of the equipment, which is not easy to install and maintain, and the waste gas treatment device has a certain weight, and placing it on the top makes the center of gravity of the curing equipment unstable. Summary of the invention

[0004] The purpose of the present invention is to provide a solar cell heat treatment device, which adopts a system layout different from the prior art, has high production efficiency and is more stable.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a solar cell heat treatment equipment, comprising a bracket, a furnace body located on the upper layer of the bracket and a conveying device for conveying solar cells, the first side wall and the second side wall opposite to the furnace body are respectively provided with a plurality of air inlet passages and exhaust passages, the outlet of the air inlet passage and the inlet of the exhaust passage are both connected to the inner cavity of the furnace body, and the air inlet of the air inlet passage and the exhaust outlet of the exhaust passage are both connected to a fan through pipelines; an exhaust gas treatment device is arranged between the exhaust outlet of at least one exhaust air passage and the fan connected thereto, the inlet pipeline of the exhaust gas treatment device is connected to the exhaust outlet of the exhaust air passage, the outlet pipeline is connected to the inlet of the fan, and the outlet pipeline of the fan is connected to the exhaust gas discharge port; the exhaust gas treatment device is arranged at the bottom of the bracket, and a plurality of the fans are arranged between the furnace body and the exhaust gas treatment device.

[0006] As a further improvement of the present invention, the furnace body includes a plurality of furnace sections connected in sequence along the length direction, and the air inlet duct and the exhaust duct are respectively arranged on opposite sides of each furnace section, and the fan, the exhaust gas treatment device and the exhaust gas discharge port are correspondingly arranged in plurality.

[0007] As a further improvement of the present invention, multiple exhaust gas treatment devices are located directly below the furnace body and are arranged in sequence along the length direction of the furnace body, and multiple fans are also located directly below the furnace body and are arranged in sequence along the length direction of the furnace body.

[0008] As a further improvement of the present invention, the height of the inner cavity of the furnace body is greater than its width.

[0009] As a further improvement of the present invention, the exhaust outlet of the exhaust air path of one furnace section among the multiple furnace sections and the air inlet of the air inlet path of at least one other furnace section are respectively connected to the inlet and outlet of a fan by pipelines, and the exhaust outlet pipelines of the exhaust air paths of the connected furnace sections are connected to the inlet of one of the exhaust gas treatment devices.

[0010] As a further improvement of the present invention, the plurality of furnace sections at least include an input section, an intermediate section and an output section which are arranged in sequence, and the front and rear ends of the input section and the output section are both provided with door assemblies which can be opened or closed.

[0011] As a further improvement of the present invention, each of the door components includes a door body that translates along the end surface of the corresponding furnace section of the curing furnace where it is located, and a first driving member for driving the door body to move.

[0012] As a further improvement of the present invention, the output section and the input section each include a furnace section, the middle section includes multiple furnace sections, the exhaust outlet of the exhaust air path of a furnace section in the middle section and the air inlet of the air inlet path of the furnace sections occupied by the input section and the output section are respectively connected to the inlet and outlet of a fan by pipelines, and the outlet pipelines of the exhaust air paths of the input section and the output section are connected to the inlet of an exhaust gas treatment device.

[0013] As a further improvement of the present invention, the other furnace sections in the middle section are grouped into two each, and the exhaust port of the exhaust air path of one furnace section in each group and the air inlet of the air inlet air path of the other furnace sections are respectively connected to the inlet and outlet of a fan by pipelines, and the exhaust port pipelines of the exhaust air paths of the connected furnace sections are connected to the inlet of one of the exhaust gas treatment devices.

[0014] Beneficial effects of the present invention:

[0015] The present invention arranges the air inlet and exhaust ducts on two opposite first side walls and second side walls of the furnace body, respectively, so that the solar cells can be placed in the inner cavity of the furnace body at intervals along the height of the furnace body. The furnace body can accommodate more solar cells at a time, thereby improving production efficiency. The exhaust gas treatment device is placed at the bottom of the bracket, which is easy to install and maintain, and the center of gravity of the equipment is lowered, so that the equipment can be placed more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a solar cell heat treatment device provided by the present invention;

[0017] Figure 2 A schematic diagram of the front view of a solar cell heat treatment device provided by the present invention;

[0018] Figure 3 for Figure 1 The structural diagram of the middle furnace body;

[0019] Figure 4 A schematic side view of the structure of a solar cell heat treatment device provided by the present invention;

[0020] Figure 5 A schematic diagram of the connection between a furnace section, a fan, an exhaust gas treatment device and an exhaust gas discharge port in a solar cell heat treatment device provided by the present invention;

[0021] Figure 6 A schematic diagram of the connection of a partial furnace section, a fan, an exhaust gas treatment device and an exhaust gas discharge port in another solar cell heat treatment equipment provided by the present invention

[0022] Figure 7A schematic diagram of the connection of another part of the furnace section, the fan, the exhaust gas treatment device and the exhaust gas discharge port in a solar cell heat treatment device provided by the present invention;

[0023] Figure 8 for Figure 3 The structural diagram of the input section or output section corresponding to the local furnace section;

[0024] Fig. 9 for Figure 1 A schematic diagram of the front view of the middle furnace body, wherein the door body located at the front is hidden;

[0025] Fig.10 for Figure 3 A schematic diagram of the structure of another part of the furnace section corresponding to the input section or output section;

[0026] Fig.11 A schematic diagram of a partial structure of a solar cell heat treatment device provided by the present invention;

[0027] Fig.12 for Figure 1 A schematic diagram of the structure of a supporting mechanism loaded with solar cells;

[0028] Fig.13 for Figure 1 A schematic diagram of the cross-sectional structure of the middle furnace body;

[0029] Fig.14 for Figure 1 A perspective structural diagram of one side of a furnace section of the middle furnace body;

[0030] Fig.15 for Figure 3 A schematic diagram of the structure from the other side of the middle furnace section;

[0031] Fig.16 for Fig.15 Schematic diagram of the structure of the middle mesh plate and the gauze;

[0032] In the figure:

[0033] 1. Bracket;

[0034] 2. furnace body; 23. input section; 24. middle section; 25. output section; 26. first insulation layer; 27. second insulation layer;

[0035] 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;

[0036] 4. Fan;

[0037] 5. Waste gas treatment device;

[0038] 6. Exhaust gas outlet;

[0039] 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;

[0040] 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;

[0041] 9. mesh plate; 91. third opening; 92. circle; 93. gauze;

[0042] 10. Door assembly; 101. Door body; 102. Second driving member;

[0043] 11. support plate; 111. cushion block; 112. slide rail;

[0044] 12. Connecting block;

[0045] 13. Sliding groove. DETAILED DESCRIPTION

[0046] 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.

[0047] like Figures 1 to 16 As shown, a solar cell heat treatment device is used for heat treatment of solar cells, which includes a bracket 1, a furnace body 2 located on the bracket 1, and a conveying device 3 for conveying solar cells. The first side wall and the second side wall opposite to the furnace body 2 are respectively provided with a plurality of air inlet passages 7 and exhaust passages 8, the outlets of the air inlet passages 7 and the inlets of the exhaust passages 8 are both connected to the inner cavity of the furnace body 2, and the air inlet 71 of the air inlet passage 7 and the exhaust passage 81 of the exhaust passage 8 are both connected to the fan 4 through pipelines. The first side wall and the second side wall both extend in the longitudinal direction.

[0048] The fan 4 connected to the air inlet 71 of the air inlet passage 7 is used as a heat source to input hot air into the inner cavity of the furnace body 2 through the air inlet passage 7. The hot air flows horizontally from the first side wall to the second side wall, and then flows out of the inner cavity of the furnace body 2 through the exhaust passage 8. Such a configuration is suitable for heat treatment of multiple sheet-like objects placed at intervals in the longitudinal direction, such as solar cells. The hot air sent into the inner cavity of the furnace body 2 by the air inlet passage 7 can pass through the gaps between multiple adjacent solar cells and fully contact the upper and lower surfaces of the solar cells.

[0049] An exhaust gas treatment device 5 is provided between the exhaust port 81 of at least one exhaust air passage 8 and the fan 4 connected thereto, the inlet pipeline of the exhaust gas treatment device 5 is connected to the exhaust port 81 of the exhaust air passage 8, the outlet pipeline is connected to the inlet of the fan 4, and the outlet pipeline of the fan 4 is connected to the exhaust gas discharge port 6. Harmful substances are generated during the heat treatment of solar cells. The exhaust gas treatment device 5 can treat the harmful gases discharged from the exhaust air passage 8. After the treatment is completed, the harmful gases are driven by the fan 4 and discharged from the exhaust gas discharge port 6. The exhaust gas treatment device 5 is a combustion tower, which is suitable for treating organic waste gas generated during the heat treatment of solar cells.

[0050] The exhaust gas treatment device 5 is arranged at the bottom of the bracket 1, and a plurality of fans 4 are arranged between the furnace body 2 and the exhaust gas treatment device 5. The 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, and it is easy to install and maintain when it is arranged at the bottom of the bracket 1, and the center of gravity of the equipment is lowered, 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.

[0051] The furnace body 2 includes a plurality of furnace sections connected in sequence along the length direction. The first side wall and the second side wall opposite to each furnace section are respectively provided with an air inlet duct 7 and an exhaust duct 8 to make the temperature uniform at various locations in the furnace body 2. A plurality of fans 4, exhaust gas treatment devices 5 and exhaust gas discharge ports 6 are correspondingly provided.

[0052] 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.

[0053] The height of the inner cavity of the furnace body 2 is greater than its width, and the solar cells can be stacked in the inner cavity of the furnace body 2 along the height direction of the furnace body 2. The furnace body 2 can accommodate more solar cells at one time, and the production efficiency is high.

[0054] like Figures 5 to 7 As shown, the exhaust port 81 of the exhaust air duct 8 of one furnace section among the multiple furnace sections and the air inlet 71 of the air inlet duct 7 of at least one other furnace section are respectively connected to the inlet and outlet of a fan 4 by pipelines, and the exhaust port 81 of the exhaust air duct 8 of the connected furnace section is connected to the inlet of an exhaust gas treatment device 5 by pipelines.

[0055] In this way, the hot gas discharged from the inner cavity of one furnace section enters the inner cavity of other furnace sections, and then is discharged from the inner cavity of other furnace sections to a waste gas treatment device 5. At least two furnace sections can share one waste gas treatment device 5, which can reduce the number of waste gas treatment devices 5.

[0056] like Figure 3 , 8 As shown in FIG. 10 , the multiple furnace sections at least include an input section 23 , a middle section 24 and an output section 25 which are arranged in sequence, and both front and rear ends of the input section 23 and the output section 25 are provided with door assemblies 10 which can be opened or closed.

[0057] 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] 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 opened, and the door assembly 10 close 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 close to the end of the middle section 24 is opened, so that the solar panel can enter the middle section 24 from the input section 23; after the solar 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 panel to leave the inner cavity of the furnace body 2.

[0059] 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.

[0060] When the solar cell is subjected to heat treatment, in the input section 23, the solar cell is heated from room temperature to the temperature required for heat treatment, in the middle section 24, the solar cell is stably at the temperature required for curing, and in the output section 25, the solar cell is cooled from the temperature required for heat treatment to room temperature. In these two stages, the amount of harmful substances produced by the solar cell in the input section 23 and the output section 25 will be less than the amount of harmful substances produced by the solar cell in the middle section 24.

[0061] like Figures 5 to 7 As shown, since the solar cells produce less harmful substances in the input section 23 and the output section 25, the outlet of the exhaust air path 8 of a furnace section in the middle section 24 and the air inlet 71 of the air inlet path 7 of the furnace section occupied by the input section 23 and the output section 25 are respectively connected to the inlet and outlet of a fan 4 through pipelines, and the outlet pipelines of the exhaust air path 8 of the input section 23 and the output section 25 are connected to the inlet of an exhaust gas treatment device 5. The two furnace sections of the input section 23 and the output section 25 and the one furnace section of the middle section 24, a total of three furnace sections, share one exhaust gas treatment device 5, so that the treatment capacity of the exhaust gas treatment device 5 is fully utilized.

[0062] For the others, the middle section 24 and other furnace sections are grouped into two each, and in each group, the air outlet of the exhaust air duct 8 of one furnace section and the air inlet 71 of the air inlet air duct 7 of the other furnace section are respectively connected to the inlet and outlet of a fan 4 by pipelines, and the outlet pipelines of the exhaust air duct 8 of the connected furnace sections are connected to the inlet of an exhaust gas treatment device 5, and every two furnace sections share one exhaust gas treatment device 5.

[0063] like Figures 8 to 10 As shown, 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 this 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] like Fig.11 and Fig.12 As shown, 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 .

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 .

[0077] 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.

[0078] like Figures 13 to 16As shown, 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 balancing 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 device, and the heat source inputs hot air into the air inlet path 7. The hot air enters the air inlet path 7, passes through the first air balancing duct 73, and 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.

[0079] 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.

[0080] Similar to the air inlet passage 7, the exhaust passage 8 includes an exhaust port 81 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 exhaust port 81 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 exhaust port 81.

[0081] 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 exhaust port 81 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, 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] In summary, the present invention has at least the following advantages:

[0087] 1. 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.

[0088] 2. Multiple furnace sections are connected in series or in parallel to share one exhaust gas treatment device 5, which saves equipment cost and equipment volume.

[0089] 3. 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.

[0090] 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.

[0091] 5. 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.

[0092] 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.

[0093] 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.

[0094] 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 device, comprising a support, a furnace body located on the upper layer of the support, and a conveying device for conveying solar cells, characterized in that: The first side wall and the second side wall opposite to the furnace body are respectively provided with a plurality of air inlet passages and exhaust passages, the outlet of the air inlet passage and the inlet of the exhaust passage are both connected to the inner cavity of the furnace body, and the air inlet of the air inlet passage and the exhaust passage are both connected to a fan through pipelines; an exhaust gas treatment device is provided between at least one exhaust passage and the fan connected thereto, the inlet pipeline of the exhaust gas treatment device is connected to the exhaust passage of the exhaust air, the outlet pipeline is connected to the inlet of the fan, and the outlet pipeline of the fan is connected to the exhaust gas discharge port; the exhaust gas treatment device is provided at the bottom of the bracket, and a plurality of the fans are provided between the furnace body and the exhaust gas treatment device; The furnace body comprises a plurality of furnace sections connected in sequence along the length direction, the air inlet duct and the air exhaust duct are respectively arranged on opposite sides of each furnace section, and the fan, the exhaust gas treatment device and the exhaust gas discharge port are correspondingly arranged in plurality; The plurality of furnace sections at least include an input section, an intermediate section and an output section arranged in sequence; The output section and the input section each include a furnace section, the middle section includes multiple furnace sections, the exhaust outlet of the exhaust air path of a furnace section in the middle section and the inlet of the air inlet path of the furnace sections occupied by the input section and the output section are respectively connected to the inlet and outlet of a fan by pipelines, and the outlet pipelines of the exhaust air paths of the input section and the output section are connected to the inlet of an exhaust gas treatment device.

2. The solar cell heat treatment equipment according to claim 1, characterized in that: The plurality of exhaust gas treatment devices are located directly below the furnace body and are arranged in sequence along the length direction of the furnace body. The plurality of fans are also located directly below the furnace body and are arranged in sequence along the length direction of the furnace body.

3. The solar cell heat treatment equipment according to claim 1, characterized in that: The exhaust gas discharge port is arranged on the top of the bracket.

4. The solar cell heat treatment equipment according to claim 1, characterized in that: The height of the inner cavity of the furnace body is greater than its width.

5. The solar cell heat treatment equipment according to claim 1, characterized in that: Door components that can be opened or closed are provided at the front and rear ends of the input section and the output section.

6. The solar cell heat treatment equipment according to claim 5, characterized in that: Each of the door components comprises a door body, a door body that translates along an end surface of a corresponding furnace section of the curing furnace where the door component is located, and a first driving member for driving the door body to move.

7. The solar cell heat treatment equipment according to claim 1, characterized in that: The other furnace sections in the middle section form a group of two each, and in each group, the exhaust port of the exhaust air path of one furnace section and the air inlet of the air inlet air path of the other furnace sections are respectively connected to the inlet and outlet of a fan by pipelines, and the exhaust port pipelines of the exhaust air paths of the connected furnace sections are connected to the inlet of one of the exhaust gas treatment devices.

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