Solar cell heat treatment apparatus

Abstract

The application discloses a solar cell heat treatment equipment, which comprises a heat treatment furnace, the heat treatment furnace comprises a plurality of furnace sections connected in sequence along the length direction, the furnace sections at least comprise an input section, an intermediate section and an output section arranged in sequence, the inner cavities of the input section, the intermediate section and the output section are communicated in sequence along the length direction of the heat treatment furnace, and the front and back ends of the input section and the output section are provided with openable and closable door assemblies, each door assembly comprises a door body which translates along the end face of the corresponding furnace section of the heat treatment furnace and a driving part for driving the door body to move. Before the solar cell enters or leaves the inner cavity of the heat treatment furnace, the door assembly can close the communication part of the input section or the output section and the intermediate section, so that the heat loss of the inner cavity of the heat treatment furnace is prevented, the stability of the internal temperature of the heat treatment furnace is ensured, and the leakage of harmful substances and the waste of energy can be avoided.

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 restriction and huge reserves. In the prior art, solar cells are often used to convert the radiant energy of the sun into electrical 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 solidification equipment includes a heat treatment furnace. When the solar cell enters and leaves the inner cavity of the heat treatment furnace, the door assembly at both ends of the heat treatment furnace needs to be opened. The hot gas in the inner cavity is easily discharged, which can cause the following problems: 1. The temperature in the inner cavity is unstable, which affects the solidification effect of the solar cell; 2. Harmful substances generated during the solidification of the solar cell will directly leak to the outside; 3. Energy is wasted. SUMMARY

[0004] The purpose of the present application is to provide a solar cell heat treatment equipment, which can prevent the hot gas in the inner cavity of the heat treatment furnace from being easily discharged when the solar cell enters and leaves the inner cavity of the heat treatment furnace.

[0005] To achieve the above purpose, the present application provides a solar cell heat treatment equipment, which includes a heat treatment furnace. The heat treatment furnace includes a plurality of furnace sections connected in sequence along the length direction. The plurality of furnace sections at least includes an input section, an intermediate section and an output section arranged in sequence. The inner cavities of the input section, the intermediate section and the output section are sequentially communicated along the length direction of the heat treatment furnace. The input section and the output section are provided with openable or closable door assemblies at the front and rear ends thereof. Each door assembly includes a door body translating along the end face of the corresponding furnace section of the heat treatment furnace and a first driving member for driving the door body to move.

[0006] Each furnace section has an air inlet air path and an air exhaust air path communicating with the inner cavity thereof. The solar cell heat treatment equipment further includes a plurality of fans and a plurality of waste gas treatment devices. The plurality of furnace sections, the plurality of fans and the plurality of waste gas treatment devices form a plurality of heat treatment units.

[0007] The plurality of heat treatment units comprises a first heat treatment unit and a second heat treatment unit, and each of the first heat treatment unit and the second heat treatment unit comprises a first fan, a first furnace section, a second fan, a second furnace section and a waste gas treatment device which are sequentially connected by pipelines, wherein the outlet of the first fan is connected with the air inlet pipeline of the first furnace section, the inlet of the second fan is connected with the air outlet pipeline of the first furnace section, the outlet of the second fan is connected with the air inlet pipeline of the second furnace section, and the air outlet pipeline of the second furnace section is connected with the waste gas treatment device.

[0008] In the first heat treatment unit, one second furnace section is arranged; in the second heat treatment unit, two second furnace sections are arranged; and the two second furnace sections of the second heat treatment unit are connected in parallel between the second fan and the waste gas treatment device of the second heat treatment unit.

[0009] In the length direction of the heat treatment furnace, the first furnace section and the second furnace section in the first heat treatment unit and the first furnace section in the second heat treatment unit are arranged between the two second furnace sections in the second heat treatment unit, and the two second furnace sections in the second heat treatment unit are the input section and the output section, respectively.

[0010] As a further improvement of the present application, the door body is arranged to move along the width direction of the corresponding furnace section of the heat treatment furnace.

[0011] As a further improvement of the present application, the top wall of the heat treatment furnace is provided with a support plate on the side of the door body along the moving direction of the door body, the door body is slidably connected with the support plate, one end of the support plate in the width direction exceeds the heat treatment furnace, the first driving member is installed on the support plate, one side of the driving end of the first driving member is connected with a connecting block, the other side of the connecting block is connected with the door body, and the first driving member drives the door body to move through the connecting block.

[0012] As a further improvement of the present application, the support plate is provided with a pad on both sides of the connecting block, and the pad is arranged in the moving direction of the connecting block and can contact the connecting block.

[0013] As a further improvement of the present application, the top of the door body is slidably connected with the support plate through a sliding rail, and the bottom is slidably arranged in a sliding groove at the bottom of the heat treatment furnace.

[0014] As a further improvement of the present application, the air inlet pipeline and the air outlet pipeline are arranged on the first side wall and the second side wall of the input section, the intermediate section and the output section, respectively, and a heat source is connected with the air inlet pipeline.

[0015] As a further improvement of the present application, the air inlet air path comprises an air inlet on the outside of the first side wall and in communication with the heat supply source, a plurality of first openings on the inside of the first side wall, and a first air uniformizing duct in communication with the air inlet and the plurality of first openings.

[0016] As a further improvement of the present application, the air outlet air path comprises a plurality of second openings on the inside of the second side wall, an air outlet on the outside of the second side wall, and a second air uniformizing duct in communication with the plurality of second openings and the air outlet.

[0017] As a further improvement of the present application, the heat treatment furnace further comprises a control system electrically connected with the first driving member, for controlling the closing of the door body at one end of the furnace section when the door body at the other end is opened.

[0018] As a further improvement of the present application, each of the door bodies is provided as a single piece and is driven by the first driving member to move towards one side to open and close the furnace section. The present application has the following advantages:

[0019] The solar cell heat treatment equipment provided by the present application is provided with door assemblies at the two ends of the input section and the output section, which can close the communication between the input section or the output section and the middle section before the solar cell enters or leaves the inner cavity of the heat treatment furnace, so as to prevent the heat loss of the inner cavity of the heat treatment furnace, ensure the stability of the internal temperature of the heat treatment furnace, and avoid the leakage of harmful substances and the waste of energy. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure;

[0021] Figure 2 The structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure; Figure 1 The structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure;

[0022] Figure 3 The front view structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure, in which the door body at the most front side is hidden;

[0023] Figure 4 The structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure; Figure 1 The structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure;

[0024] Figure 5 The front view structure schematic diagram of the solar cell heat treatment equipment provided by the present application is shown in the figure;

[0025] Figure 6 The sectional view structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure;

[0026] Figure 7 The sectional view structure schematic diagram of the heat treatment furnace provided by the present application is shown in the figure;Figure 1 A side perspective structural schematic view of one furnace section of the heat treatment furnace;

[0027] Figure 8 For Figure 7 A side perspective structural schematic view of another furnace section of the heat treatment furnace;

[0028] Figure 9 For Figure 7 A structural schematic view of the mesh plate and gauze;

[0029] Figure 10 A structural schematic view of a first heat treatment unit of a solar cell heat treatment device provided by the present application;

[0030] Figure 11 A structural schematic view of a second heat treatment unit of a solar cell heat treatment device provided by the present application;

[0031] Figure 12 A structural schematic view of a heat treatment system of a solar cell heat treatment device provided by the present application;

[0032] Figure 13 A structural schematic view of a solar cell heat treatment device provided by the present application;

[0033] Figure 14 A structural schematic view of a solar cell heat treatment device provided by the present application;

[0034] Figure 15 For Figure 13 A structural schematic view of a bearing mechanism loaded with solar cells;

[0035] Figure 16 A side structural schematic view of a solar cell heat treatment device provided by the present application.

[0036] In the figure:

[0037] 1, support;

[0038] 2, heat treatment furnace; 21, first furnace section; 22, second furnace section; 23, input section; 24, intermediate section; 25, output section; 26, first heat insulation layer; 27, second heat insulation layer;

[0039] 3, conveying device; 31, conveying mechanism; 311, roller shaft; 312, second 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;

[0040] 4, fan; 41, first fan; 42, second fan; 43, exhaust fan;

[0041] 5. The exhaust treatment device;

[0042] 6. The exhaust port;

[0043] 7. The air inlet wind path; 71, the air inlet; 72, the first opening; 73, the first uniform air duct; 731, the first intermediate air cavity; 732, the first uniform air cavity;

[0044] 8. The air outlet wind path; 81, the air outlet; 82, the second opening; 83, the second uniform air duct; 831, the second intermediate air cavity; 832, the second uniform air cavity;

[0045] 9. The mesh plate; 91, the third opening; 92, the surrounding ring; 93, the gauze;

[0046] 10. The door assembly; 101, the door body; 102, the first driving member;

[0047] 11. The support plate; 111, the cushion block; 112, the sliding rail;

[0048] 12. The connecting block;

[0049] 13. The sliding groove. DETAILED DESCRIPTION

[0050] 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 changes in structure, method, or function made by those skilled in the art based on the embodiments are included in the protection scope of the present application.

[0051] As shown in Figure 1 and Figure 13 A solar cell heat treatment device includes a support 1 and a heat treatment furnace 2 for solar cell heat treatment on the support 1, the heat treatment furnace 2 includes a plurality of furnace sections connected in sequence along the length direction, the furnace sections at least include input section 23, intermediate section 24 and output section 25 arranged in sequence, the inner cavities of the input section 23, the intermediate section 24 and the output section 25 are communicated in sequence along the length direction of the heat treatment furnace 2, and the front and rear ends of the input section 23 and the output section 25 are provided with openable or closable door assemblies 10.

[0052] In this way, before the solar cell panel enters the inner cavity of the input section 23, the door assembly 10 far from one end of the middle section 24 is opened, and the door assembly 10 close to the middle section 24 is closed, and after the solar cell panel enters the inner cavity of the input section 23, the door assembly 10 far from one end of the middle section 24 is closed, and the door assembly 10 close to one 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; and after the solar cell panel passes through the middle section 24 and enters the inner cavity of the output section 25, the door assembly 10 close to one end of the middle section 24 is closed, and the door assembly 10 far from one end of the middle section 24 is opened, so that the solar cell panel can leave the inner cavity of the heat treatment furnace 2.

[0053] Due to the blocking of the door assembly 10, the heat of the middle section 24 is not easily dissipated when the solar cell panel enters or leaves the inner cavity of the heat treatment furnace 2, and the temperature of the middle section 24 can be kept stable, which ensures the solidification effect and avoids the leakage of harmful gas in the heat treatment furnace 2 and saves energy. The middle section 24 is the main working area of the heat treatment furnace 2, and the volume of the inner cavity thereof is at least 5 times the volume of the input section 23 or the output section 25.

[0054] As shown in Figure 2 Each door assembly 10 includes a door body 101 moving along the end face of the corresponding furnace section of the heat treatment furnace 2 and a first driving member 102 for driving the door body 101 to move. The door body 101 is driven by the first 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 heat treatment furnace 2 compared to the rotating opening or closing mode, thereby ensuring that the heat is not lost and saving the space required in the length direction of the heat treatment furnace 2. The first driving member 102 can be a telescopic cylinder.

[0055] The door body 101 can move in the height direction, the width direction and the inclined direction of the corresponding furnace section of the heat treatment furnace 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 heat treatment furnace 2.

[0056] Each door body 101 can be arranged in a single piece and move towards one side under the driving of the first driving member 102 to open and close the furnace section, or can be arranged in multiple pieces and move 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.

[0057] As shown in Figure 3 and Figure 4As shown, a support plate 11 is arranged on the top wall of the heat treatment furnace 2 at the side of the door body 101 and along the moving direction of the door body 101, the door body 101 is slidingly connected with the support plate 11, and one end of the support plate 11 in the width direction exceeds the heat treatment furnace 2, and when the door body 101 is moved to one side to be opened, it can exceed the heat treatment furnace 2. The first driving member 102 is installed on the support plate 11, and the driving end is connected with one side of the connecting block 12, and the other side of the connecting block 12 can be connected with the door body 101 through a plurality of connecting holes, and the first driving member 102 drives the door body 101 to move through the connecting block 12.

[0058] The support plate 11 is provided with a pad 111 on both sides of the connecting block 12, and the pad 111 is arranged in the moving direction of the connecting block 12 and can contact the connecting block 12, and the installation position of the two pads 111 can be controlled to limit the moving range of the connecting block 12, 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.

[0059] The top of the door body 101 is slidingly connected with the support plate 11 through a sliding rail 112, and the sliding rail 112 is a commonly used commercial part, which is 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.

[0060] The bottom of the door body 101 is slidingly arranged in a sliding groove 13 arranged at the bottom of the heat treatment furnace 2, and the sliding groove 13 at the bottom cooperates with the sliding rail 112 at the top to ensure that the door body 101 slides reliably and smoothly.

[0061] The heat treatment furnace 2 further comprises a control system electrically connected with the first driving member 102 for controlling the closing of the door body 101 at the other end when the door body 101 at one end of the same furnace section is opened, so as to prevent the loss of heat in the heat treatment furnace 2.

[0062] As shown in the drawings, Figures 5 to 9 The first side wall and the second side wall of the input section 23, the middle section 24 and the output section 25 are respectively provided with an air inlet air path 7 and an air exhaust air path 8, and the air inlet air path 7 is connected with a heat source. The heat source can be a first fan 41 arranged on the bracket 1. The first side wall and the second side wall extend along the longitudinal direction.

[0063] The hot air provided by the heat source to the air inlet channel 7 can be uniformly input into the inner cavity of the heat treatment furnace 2. The hot air flows laterally from the first side wall to the second side wall in the inner cavity of the heat treatment furnace 2, and then flows out of the inner cavity of the heat treatment furnace 2 from the air outlet channel 8. Such a configuration is suitable for heat treatment of a plurality of solar cells arranged longitudinally at intervals. The hot air input into the inner cavity of the heat treatment furnace 2 by the air inlet channel 7 can pass through the gaps between 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.

[0064] The air inlet channel 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 in communication with the heat source on the device, and the heat source inputs hot air into the air inlet channel 7. The input hot air passes through the first uniform air duct 73 and is discharged from the plurality of first openings 72, uniformly entering the inner cavity of the heat treatment furnace 2. The plurality of first openings 72 can be uniformly arranged on the inner side of the first side wall of the heat treatment furnace 2, occupying a sufficient area to ensure that hot air is blown to all areas in the heat treatment furnace 2 without dead angles.

[0065] The first uniform air duct 73 includes a first intermediate air cavity 731 arranged in the middle of the first side wall and communicating 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 channel 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 heat treatment furnace 2 through the plurality of first openings 72 in the first intermediate air cavity 731, so that the hot air provided by the heat source can uniformly enter the inner cavity of the heat treatment furnace 2 from the plurality of first openings 72.

[0066] Similar to the air inlet channel 7, the air outlet channel 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 heat treatment furnace 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.

[0067] The second uniform air duct 83 comprises 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 first intermediate air cavity 731, the outlet of the second uniform air cavity 832 is the air outlet of the exhaust air path 8, 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 gas in the heat treatment furnace 2 enters the second intermediate air cavity 831 uniformly from the plurality of second openings 82 at a certain air speed, and then enters the second uniform air cavity 832 uniformly from the plurality of inlets of the second uniform air cavity 832, and finally is discharged from the exhaust port 81.

[0068] The first uniform air cavity 732 and the second uniform air cavity 832 are H-shaped and are uniformly arranged in the first intermediate air cavity 731 and the second intermediate air cavity 831, respectively. The H-shaped first uniform air cavity 732 or the second uniform air 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 uniform air cavity 732 or the inlet of the second uniform air cavity 832 is provided on the two side portions of the H-shaped structure. This arrangement allows the outlet of the first uniform air cavity 732 or the inlet of the second uniform air cavity 832 to be uniformly distributed along the length and width directions of the first uniform air cavity 732 or the second uniform air cavity 832, achieving good air uniformity.

[0069] The first uniform air cavity 732 and the second uniform air cavity 832 are arranged in the first intermediate air cavity 731 and the second intermediate air cavity 831, respectively, and have two or four, the specific number is determined by the space of the first uniform air cavity 732 or the second uniform air cavity 832, so that the outlet of the first uniform air cavity 732 or the inlet of the second uniform air cavity 832 is uniformly distributed in the first uniform air cavity 732 or the second uniform air cavity 832.

[0070] The second side wall of the heat treatment furnace 2 is provided with a hollow mesh plate 9, the outer side of the mesh plate 9 is provided with a first heat insulation layer 26, and the top of the heat treatment furnace 2 is provided with a second heat insulation layer 27. The mesh plate 9, the first heat insulation layer 26 and the second heat 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 heat insulation layer has the effect of heat preservation for the heat treatment furnace 2. The side of the mesh plate 9 close to the inner cavity of the heat treatment furnace 2 is provided with a plurality of second openings 82, and the side away from the inner cavity of the heat treatment furnace 2 is provided with a plurality of third openings 91. The air in the heat treatment furnace 2 passes through the plurality of second openings 82 and the plurality of third openings 91 to reach the second intermediate air cavity 831, and the airflow is more uniform.

[0071] Further, the side of the mesh plate 9 close to the inner cavity of the heat treatment furnace 2 is provided with a raised rim 92, the plurality of second openings 82 are arranged in the area enclosed by the bottom of the rim 92, and the top of the rim 92 is covered with a gauze 93. The air in the heat treatment furnace 2 first passes through the gauze 93 before reaching the plurality of second openings 82, and the airflow is more uniform.

[0072] Since harmful substances are generated when the solar cells are subjected to heat treatment, the outlet of the exhaust air passage 8 is connected to a waste gas treatment system, which includes a waste gas treatment device 5, an exhaust fan 43 and a waste gas discharge port 6, all of which are located on the support 1. The outlet of the exhaust air passage 8 is connected to the inlet of the waste gas treatment device 5, the outlet of the waste gas treatment device 5 is connected to the inlet of the exhaust fan 43, the inlet of the exhaust fan 43 is connected to the waste gas discharge port 6. The hot air flowing out of the exhaust air passage 8 is treated by the waste gas treatment device 5 and is then discharged from the waste gas discharge port 6 by the exhaust fan 43.

[0073] The heat treatment furnace 2 includes a plurality of furnace sections connected in sequence, each of which has an inner cavity, an air inlet passage 7 and an exhaust air passage 8 connected to the inner cavity. Each furnace section can be used as a heat treatment zone for heat treatment of solar cells. The first fan 41 and the waste gas treatment system are provided with a plurality of corresponding components.

[0074] The support 1 is provided with a plurality of fans 4, including the first fan 41 and the exhaust fan 43, and a second fan 42 provided between two furnace sections.

[0075] As shown in Figures 10 to 12 The plurality of furnace sections, the plurality of fans 4 located on the support 1, the plurality of waste gas treatment devices 5 and the plurality of waste gas discharge ports 6 in the plurality of waste gas treatment systems are divided into a plurality of different heat treatment units according to the connection relationship between them. Each heat treatment unit includes one waste gas treatment device 5, one waste gas discharge port 6, at least two furnace sections and three fans 4. In the heat treatment unit, the furnace sections include a first furnace section 21 and a second furnace section 22.

[0076] As one of the heat treatment units, the first heat treatment unit includes the first fan 41, the first furnace section 21, the second fan 42, the second furnace section 22, the waste gas treatment device 5, the exhaust fan 43 and the waste gas discharge port 6 connected in sequence by pipelines.

[0077] 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 to the air inlet 71 of the air inlet passage 7 of the first furnace section 21, the inlet of the second fan 42 is connected to the exhaust air outlet 81 of the exhaust air passage 8 of the first furnace section 21, the outlet of the second fan 42 is connected to the air inlet 71 of the air inlet passage 7 of the second furnace section 22, the exhaust air outlet 81 of the exhaust air passage 8 of the second furnace section 22 is connected to the inlet of the waste gas treatment device 5, the outlet of the waste gas treatment device 5 is connected to the inlet of the exhaust fan 43, and the outlet of the exhaust fan 43 is connected to the waste gas discharge port 6.

[0078] When working, 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 waste gas treatment device 5 from the air outlet wind path 8 thereof, and after the removal of harmful substances by the waste gas treatment device 5, flows to the waste gas discharge port 6 from the outlet of the waste gas 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 waste gas treatment device 5.

[0079] As another 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 between the second fan 42 and the waste gas treatment device 5. In this case, one first furnace section 21 and two second furnace sections 22, i.e., three furnace sections in total, share one waste gas treatment device 5.

[0080] 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 include only one heat treatment unit.

[0081] When performing heat treatment on the solar cells, in the input section 23, the solar cells are preheated from room temperature to the required temperature for heat treatment, in the intermediate section 24, the solar cells are stably kept at the required temperature for heat treatment, and in the output section 25, the solar cells are cooled from the required temperature for heat treatment to room temperature. The amount of harmful substances generated by the solar cells in the input section 23 and the output section 25 is less than the amount of harmful substances generated by the solar cells in the intermediate section 24. Therefore, the two second furnace sections 22 of the second heat treatment unit are respectively the input section 23 and the output section 25, and the other furnace sections are 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 waste gas treatment device 5 is fully utilized. The first heat treatment unit is provided with two, and the device has a total of one furnace section.

[0082] As shown in FIG. 1, the device includes a first heat treatment unit and a second heat treatment unit. Figures 13 to 15As shown, the support 1 further comprises a conveying device 3 for conveying the solar cells, the conveying device 3 comprising a conveying mechanism 31 arranged through the heat treatment furnace 2 and a carrying mechanism 32 carrying the solar cells, the carrying mechanism 32 having at least two layers of carrying portions 321 arranged at intervals along the height direction of the heat treatment furnace 2.

[0083] The interval between the adjacent two carrying portions 321 is not less than 2mm, so as to ensure that sufficient hot air passes between the adjacent two carrying portions 321.

[0084] The conveying mechanism 31 comprises a plurality of roller shafts 311 arranged along the length direction of the heat treatment furnace 2 and a second driving member 312 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 heat treatment furnace 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 conveyed stably forward.

[0085] The conveying mechanism 31 is provided with guide strips 313 on both sides above the carrying mechanism 32. When the carrying mechanism 32 is driven to move by the conveying mechanism 31, the guide strips 313 can limit the moving range of the carrying mechanism 32 and allow the carrying mechanism 32 to move 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 allow the two guide strips 313 to form an outward opening structure at the end portions, and the second inclined surfaces 325 allow the bottom of the carrying mechanism 32 to form an inward closing structure, so that the bottom of the carrying mechanism 32 is easily inserted between the two guide strips 313 and moves along the length direction of the conveying mechanism 31.

[0086] The guide strips 313 are made of Teflon or are provided with a Teflon layer on at least the adjacent side surfaces. 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.

[0087] The carrying portion 321 comprises a lower end plate 323, an upper end plate 322 arranged above the lower end plate 323, and a plurality of struts 324 respectively connected to the lower end plate 323 and the upper end plate 322. The carrying portion 321 is a groove arranged at intervals along the height direction of the plurality of struts 324. When the solar cells are placed in the carrying portion 321, the periphery is less shielded, and the hot air in the heat treatment furnace 2 can easily reach the upper and lower surfaces of the solar cells, which is also convenient for taking and placing the solar cells.

[0088] The height of the bearing mechanism 32 is greater than its width, the bearing parts 321 can be arranged in multiple in the height direction of the bearing mechanism 32, and the height of the inner cavity of the heat treatment furnace 2 is greater than its width to accommodate the bearing mechanism 32.

[0089] The plurality of solar cells can be correspondingly arranged in the plurality of bearing parts 321 and longitudinally stacked in the bearing mechanism 32.

[0090] As shown in Figure 16 The plurality of waste gas treatment devices 5 are arranged at the bottom of the support 1, the plurality of fans 4 are arranged between the heat treatment furnace 2 and the waste gas treatment device 5, the plurality of fans 4 are arranged below the heat treatment furnace 2 to facilitate pipeline communication with the air inlet air duct 7 and the air outlet air duct 8 located on the opposite sides of the heat treatment furnace 2, the waste gas treatment device 5 is arranged at the bottom of the support 1 to facilitate pipeline communication with the fan 4, in addition, the waste gas treatment device 5 has a certain weight, and is arranged at the bottom of the support 1 to facilitate installation and maintenance, and the center of gravity of the device is lowered to make the device more stable.

[0091] Specifically, the plurality of waste gas treatment devices 5 are located directly below the heat treatment furnace 2 and are arranged in sequence along the length direction of the heat treatment furnace 2, and the plurality of fans 4 are also located directly below the heat treatment furnace 2 and are arranged in sequence along the length direction of the heat treatment furnace 2, the weights of the heat treatment furnace 2, the plurality of fans 4 and the plurality of waste gas treatment devices 5 are evenly distributed on the support 1, and the device layout is also relatively compact.

[0092] The waste gas treatment device 5 is a combustion tower suitable for treating organic waste gas generated in the heat treatment process of the solar cell.

[0093] In summary, the present application has at least the following advantages:

[0094] 1. The door assembly 10 can close the communication between the input section 23 or the output section 25 and the intermediate section 24, prevent heat loss of the inner cavity of the heat treatment furnace 2 before the solar cell enters or leaves the inner cavity of the heat treatment furnace 2, ensure the stability of the internal temperature of the heat treatment furnace 2, and avoid leakage of harmful substances and waste of energy.

[0095] 2. The air inlet air duct 7 and the air outlet air duct 8 arranged on the opposite first side wall and second side wall of the heat treatment furnace 2 can effectively solidify the slurry on the plurality of solar cells arranged longitudinally and uniformly.

[0096] 3. Connecting multiple furnace sections in series or parallel and sharing a single waste gas treatment device 5 saves on equipment cost and size.

[0097] 4. Multiple solar panels can be placed longitudinally at intervals inside the heat treatment furnace 2. Compared with existing equipment, the heat treatment furnace 2 can accommodate more solar cells at one time, thus improving production efficiency.

[0098] 5. The exhaust gas treatment device 5 is placed at the bottom of the support 1, which makes it easy to install and maintain, and lowers the center of gravity of the equipment, making the equipment more stable.

[0099] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0100] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A solar cell heat treatment apparatus, characterized by, The solar cell heat treatment equipment comprises a heat treatment furnace, the heat treatment furnace comprises a plurality of furnace sections connected in sequence along the length direction, the plurality of furnace sections at least comprise an input section, an intermediate section and an output section arranged in sequence, the inner cavities of the input section, the intermediate section and the output section are communicated in sequence along the length direction of the heat treatment furnace, and the front and rear ends of the input section and the output section are provided with openable or closable door assemblies. Each of the furnace sections has an air inlet air duct and an air exhaust air duct communicating with the inner cavity thereof, and the solar cell heat treatment equipment further comprises a plurality of air fans and a plurality of waste gas treatment devices, and the plurality of furnace sections, the plurality of air fans and the plurality of waste gas treatment devices form a plurality of heat treatment units. The plurality of heat treatment units comprise a first heat treatment unit and a second heat treatment unit, the first heat treatment unit and the second heat treatment unit each comprise a first air fan, a first furnace section, a second air fan, a second furnace section and a waste gas treatment device communicated in sequence through pipelines, wherein the outlet of the first air fan is communicated with the air inlet air duct of the first furnace section through a pipeline, the inlet of the second air fan is communicated with the air exhaust air duct of the first furnace section through a pipeline, the outlet of the second air fan is communicated with the air inlet air duct of the second furnace section through a pipeline, and the air exhaust air duct of the second furnace section is communicated with the waste gas treatment device through a pipeline. In the first heat treatment unit, the second furnace section is provided as one; in the second heat treatment unit, the second furnace section is provided with two; and the two second furnace sections of the second heat treatment unit are connected in parallel between the second air fan and the waste gas treatment device of the second heat treatment unit. In the length direction of the heat treatment furnace, the first furnace section and the second furnace section in the first heat treatment unit and the first furnace section in the second heat treatment unit are all arranged between the two second furnace sections in the second heat treatment unit, and the two second furnace sections in the second heat treatment unit are the input section and the output section respectively.

2. The solar cell thermal processing apparatus of claim 1, wherein, The door body is arranged to move along the width direction of the corresponding furnace section of the heat treatment furnace.

3. The solar cell thermal processing apparatus of claim 2, wherein A support plate is arranged on one side of the door body along the moving direction of the door body on the top wall of the heat treatment furnace, the door body and the support plate are slidingly connected, one end of the support plate in the width direction exceeds the heat treatment furnace, the first driving member is installed on the support plate, one side of the connecting block connected with the driving end of the first driving member, the other side of the connecting block is connected with the door body, and the first driving member drives the door body to move through the connecting block.

4. The solar cell thermal processing apparatus of claim 3, wherein The support plates on both sides of the connecting block are provided with pad blocks, and the pad blocks are arranged in the moving direction of the connecting block and can contact the connecting block.

5. The solar cell thermal processing apparatus of claim 4, wherein, The top of the door body is slidingly connected with the support plate through a sliding rail, and the bottom is slidingly arranged in a sliding groove at the bottom of the heat treatment furnace.

6. The solar cell heat treatment apparatus according to any one of claims 1 to 5, characterized by The air inlet air duct and the air exhaust air duct are respectively arranged on the first side wall and the second side wall opposite to the input section, the intermediate section and the output section, and the air inlet air duct is communicated with a heat source through a pipeline.

7. The solar cell thermal processing apparatus of claim 6, wherein The air inlet air path comprises an air inlet on the outside of the first side wall and in communication with the heat supply source, a plurality of first openings on the inside of the first side wall, and a first air uniformizing duct in communication with the air inlet and the plurality of first openings.

8. The solar cell thermal processing apparatus of claim 7, wherein, The air exhaust air path comprises a plurality of second openings on the inside of the second side wall, an air outlet on the outside of the second side wall, and a second air uniformizing duct in communication with the plurality of second openings and the air outlet.

9. The solar cell heat treatment apparatus according to any one of claims 1 to 5, wherein The heat treatment furnace further comprises a control system electrically connected with the first driving member, for controlling the closing of the door body at one end of the furnace section when the door body at the other end is opened.

10. The solar cell thermal processing apparatus of claim 1, wherein, Each of the door bodies is provided as a single piece and is driven by the first driving member to move towards one side to open and close the furnace section thereof.

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