Heating module and drying furnace
By designing a heating module in a solar cell drying furnace, and using structures such as protective gas circulation and mesh plates, the impurity particles problem caused by direct air heating is solved, and the performance and heating effect of solar cells are improved.
Patent Information
- Application Number
- CN202420252388.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-01
AI Technical Summary
The use of air to direct heating in existing solar cell drying furnaces leads to the production of surface impurities, affecting battery performance.
Design a heating module, including a heating chamber, a transmission chamber, a thermal insulation cotton, an inflatable device and a flow guide device, circulate and circulate protective gas such as nitrogen to prevent oxidation reactions, and achieve uniform gas through mesh plates and flow guides Circulation and heating.
It effectively prevents the generation of impurities on the surface of solar cells, improves battery performance, and ensures heating uniformity and gas protection.
Smart Images
Figure CN222165618U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solar cell production, in particular to a heating module and a drying furnace. Background Art
[0002] In the prior art, with the development of photovoltaic industry technology, the requirements for drying and curing of solar cells have also increased. The heating module of the solar cell drying furnace is used to heat and dry the surface with slurry. In the prior art, due to factors such as the cost of generating the heating module in the solar cell drying furnace, air is often used directly as the heating gas, but this causes impurity particles to be generated on the surface of the solar cell during the drying process, which affects the performance of the solar cell. Utility Model Content
[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a heating module and a drying furnace to solve the problem proposed in the above background technology that air is directly used as a heating gas, resulting in the generation of impurity particles on the surface of solar cells during the drying process, thereby affecting the performance of the solar cells.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is a heating module, including a heating chamber, a transmission chamber, thermal insulation cotton, an inflation device and a flow guide device, wherein a heating component is provided inside the heating chamber for generating heating gas. The transmission chamber is used for product transmission. The thermal insulation cotton is respectively arranged around the heating chamber and the transmission chamber to form a gas channel. The gas channel is used to connect the transmission chamber and the heating chamber. The inflation device is used to fill the heating module with protective gas to prevent oxidation reaction from occurring on the surface of the product. The flow guide device is used to circulate the heating gas and the protective gas through the gas channel between the heating chamber and the transmission chamber.
[0005] The heating module provided by the utility model has a transmission chamber for transmitting the product after curing treatment, that is, the solar cell, and the heating gas generated by heating in the heating chamber is guided to flow through the transmission chamber by the guide device, so as to heat and dry the solar cell. The heating module is supplemented with gas by the inflation device, and the protective gas circulates between the heating chamber and the transmission chamber after being heated, so as to provide gas protection for the solar cell.
[0006] In some embodiments, the heating module further includes a first special gas inlet, a second special gas inlet and a special gas circulation outlet. The heating chamber is arranged on one side of the heating module along the first direction, and the flow guide device is arranged on the top of the heating module and is located at the top of the heating chamber along the second direction. The first special gas inlet is arranged on the same side as the flow guide device, and is a small flow protective gas inlet. The second special gas inlet is arranged at the bottom of the heating module, and is a large flow protective gas inlet. The special gas circulation outlet is arranged on the other side of the heating module along the first direction.
[0007] By adopting the above technical solution, the first special gas inlet is on the same side as the fan, and is arranged at the position where the heating gas leaves the heating chamber. It is a small-flow protective gas inlet and can be directly sent into the buffer chamber by the fan without passing through the heating chamber, and will not affect the temperature of the heating gas; the second special gas inlet is arranged at the bottom of the heating chamber, that is, the position where the gas returns to the heating chamber. It is a large-flow protective gas inlet. The nitrogen flowing into this inlet is heated by the heating chamber and then flows into the transmission chamber.
[0008] In some embodiments, the gas channel includes a first channel and a second channel. The first channel is disposed in the flow guide device. The second channel includes a buffer chamber between the heating chamber and the transmission chamber, a side chamber between the transmission chamber and the heating module, and a bottom chamber below the transmission chamber. The first channel is communicated with the heating chamber and the buffer chamber respectively, and the bottom chamber is communicated with the heating chamber.
[0009] With the above technical solution, the gas flow order in the first channel is from the heating chamber to the buffer chamber, and the gas flow order in the second channel is from the buffer chamber, the transmission chamber, the side chamber, the bottom chamber to the heating chamber.
[0010] In some embodiments, a first mesh plate and a second mesh plate are respectively disposed on both sides of the transmission chamber along the first direction. A heating plate is disposed on a side of the first mesh plate facing the transmission chamber.
[0011] With the above technical solution, mesh plates are provided on both sides of the transmission chamber, through which the gas is dispersed, the gas circulation speed is reduced, so that the gas can flow evenly through the transmission chamber and fully contact the solar cell for heating and drying. The mesh plate on the left side is provided with a heating plate to further heat the gas and ensure the heating effect of the solar cell.
[0012] In some embodiments, a flow guide cover is provided at the connection between the first channel and the buffer chamber, and an outlet end of the flow guide cover is arranged downward or upward.
[0013] By adopting the above technical solution, the outlet end of the guide cover is at the upper end or the lower end, that is, it is arranged perpendicular to the mesh plate. When the heating gas flows out from the first channel, the heating gas first gradually diffuses in the buffer chamber, and then flows through the first mesh plate together, so that the heating gas can synchronously and evenly dry and heat the solar cells.
[0014] In some embodiments, the heating module further comprises a waste outlet, wherein the waste outlet is disposed at the top of the heating module and is located above the transfer chamber.
[0015] By adopting the above technical solution, the waste outlet is connected to the transmission chamber to discharge the waste gas generated by the solar cell when it is heated.
[0016] In some embodiments, the heating element may be one or more of a heating wire, a heating rod, or a heating ceramic.
[0017] The technical solution also adopted by the utility model is a drying furnace, comprising a transmission mechanism, an isolation section, a preheating section, a drying section, a cooling section, and a plurality of heating modules described in the above-mentioned embodiments. The plurality of heating modules are sequentially connected and arranged along a third direction to form a drying section. The isolation section, the preheating section, the drying section and the cooling section are sequentially arranged along the third direction. The transmission mechanism is arranged in the drying furnace along the third direction to transfer the product from the isolation section to the cooling section and then transfer it out.
[0018] By adopting the above technical scheme, during the drying process of the solar cells in the drying furnace, the solar cells pass through the isolation zone, preheating zone, constant temperature zone and cooling zone in sequence. The hollow cavity of the furnace body in each zone serves as the transmission channel of the transmission mechanism and is filled with protective gas to provide gas protection for the solar cells.
[0019] In some embodiments, the drying furnace further comprises a plurality of lifting gates, and the plurality of lifting gates are arranged at least one heating module apart.
[0020] By adopting the above technical solution, the drying section is composed of heating chambers as units, and two adjacent units can be separated by a lifting gate to achieve mutual connection or isolation between the drying units. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic structural diagram of a heating module of an embodiment of a heating module and a drying furnace of the utility model;
[0022] Figure 2 A three-dimensional diagram of a drying furnace according to an embodiment of a heating module and a drying furnace of the utility model;
[0023] In the figure:
[0024] 1-heating module; 2-heating chamber; 20-heating assembly; 3-transmission chamber; 31-first mesh plate; 32-second mesh plate; 4-gas channel; 40-first channel; 41-second channel; 42-buffer chamber; 43-side chamber; 44-bottom chamber; 45-flow guide cover; 50-first special gas inlet; 51-second special gas inlet; 52-special gas circulation outlet; 60-flow guide device; 61-waste outlet; 62-insulation cotton; 7-drying furnace; 70-transmission mechanism; 71-isolation section; 72-preheating section; 73-drying section; 74-cooling section; 75-lifting gate. DETAILED DESCRIPTION
[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0026] refer to Figure 1 , Figure 1 A schematic structural diagram of a heating module 1 provided in an embodiment of the utility model is shown.
[0027] like Figure 1 As shown, the technical solution adopted by the utility model is a heating module 1, including a heating chamber 2, a transmission chamber 3, thermal insulation cotton 62, an inflation device and a flow guide device 60, wherein a heating component 20 is provided inside the heating chamber 2 for generating heating gas. The transmission chamber 3 is used for product transmission. The thermal insulation cotton 62 is respectively arranged around the heating chamber 2 and the transmission chamber 3, and forms a gas channel 4. The gas channel 4 is used to connect the transmission chamber 2 and the heating chamber 3. The inflation device is used to fill the heating module 1 with protective gas to protect the surface of the product. The flow guide device is used to circulate the heating gas and the protective gas through the gas channel 4 between the heating chamber and the transmission chamber.
[0028] The heating module 1 provided by the utility model and the transmission chamber 3 can be used for transmitting products, i.e. solar cells. The heating gas generated by heating in the heating chamber 2 is guided to flow through the transmission chamber 3 by the flow guide device 60, so as to heat and dry the solar cells. The protective gas is added to the heating module 1 by the inflation device. The protective gas in this embodiment is nitrogen, but the application does not limit the type of protective gas, and a single gas that does not chemically react with the slurry or silicon wafer can also be used, such as oxygen, helium, neon, etc. The heated nitrogen circulates between the heating chamber 2 and the transmission chamber 3 through the gas channel 4, and nitrogen protection is achieved while drying the solar cells.
[0029] The heat-insulating cotton arranged around the heating chamber 2 and the transmission chamber 3 can not only ensure the airtightness of the gas channel 4, but also keep the gas in the gas channel 4 warm to prevent the rapid loss of its heat, thereby reducing the workload of the heating component 20. The flow-guiding device 60 in this embodiment is a fan, and the negative pressure generated by the fan causes the gas to circulate between the heating chamber 2 and the transmission chamber 3.
[0030] In some embodiments, reference Figure 1 The heating module 1 further includes a first special gas inlet 50, a second special gas inlet 51 and a special gas circulation outlet 52. The heating chamber 2 is arranged on the heating module 1 along the first direction ( Figure 1 The guide device 60 is disposed on the top of the heating module 1 and is located at the heating chamber 2 along the second direction ( Figure 1 The first special gas inlet 50 is arranged on the same side as the flow guide device 60, which is a small flow protective gas inlet. The second special gas inlet 51 is arranged at the bottom of the heating module 1, which is a large flow protective gas inlet. The special gas circulation outlet 52 is arranged on the other side of the heating module 1 along the first direction.
[0031] Exemplarily, in this embodiment, there are two special gas inlets, the first special gas inlet 50 and the guide device 60, that is, the same side of the fan, are arranged at the position where the heated gas leaves the heating chamber 2, and are small flow protective gas inlets, which can be directly sent to the buffer chamber 42 by the fan without passing through the heating chamber 2, and will not affect the temperature of the heated gas; the second special gas inlet 51 is arranged at the bottom of the heating chamber 2, that is, the position where the gas returns to the heating chamber 2, and is a large flow protective gas inlet. The protective gas flowing into the inlet is heated by the heating chamber 2 and then flows into the transmission chamber 3. The protective gas is circulated and collected through the special gas circulation outlet 52.
[0032] In some embodiments, reference Figure 1 The gas channel 4 includes a first channel 40 and a second channel 41. The first channel 40 is disposed in the flow guide device 60. The second channel 41 includes a buffer chamber 42 located between the heating chamber 2 and the transmission chamber 3, a side chamber 43 located between the transmission chamber 3 and the heating module 1, and a bottom chamber 44 located below the transmission chamber 3. The first channel 40 is communicated with the heating chamber 2 and the buffer chamber 42, respectively, and the bottom chamber 44 is communicated with the heating chamber 2.
[0033] For example, Figure 1 As shown by the dotted arrows, the gas flow order inside the first channel 40 is from the heating chamber 2 to the buffer chamber 42, and the gas flow order inside the second channel 41 is from the buffer chamber 42, the transfer chamber 3, the side chamber 43, the bottom chamber 44 to the heating chamber 2.
[0034] In some embodiments, reference Figure 1The transmission chamber 3 is provided with a first mesh plate 31 and a second mesh plate 32 on both sides along the first direction. A heating plate is provided on the side of the first mesh plate 31 facing the transmission chamber 3.
[0035] For example, mesh plates are provided on both sides of the transmission chamber 3, through which the gas is dispersed to reduce the circulation speed of the gas, so that the gas can evenly circulate in the transmission chamber 3 and fully contact with the solar cell for heating and drying. The mesh plate on the left side is provided with a heating plate to further heat the gas to ensure the heating effect of the solar cell.
[0036] In some embodiments, reference Figure 1 A flow guide 45 is provided at the connection between the first channel 40 and the buffer chamber 42. The outlet end of the flow guide 45 is arranged downward or upward.
[0037] Exemplarily, the outlet end of the guide cover 45 is located at the upper end or the lower end, that is, it is arranged perpendicular to the mesh plate. When the heating gas flows out from the first channel 40, the heating gas first gradually diffuses in the buffer chamber 42, and then flows through the first mesh plate 31 together, so that the heating gas can synchronously and evenly dry and heat the solar cells.
[0038] In some embodiments, reference Figure 1 The heating module 1 further includes a waste outlet 61 . The waste outlet 61 is disposed at the top of the heating module 1 and is located above the transfer chamber 3 .
[0039] Exemplarily, the exhaust outlet 61 is connected to the transmission chamber 3 to discharge the exhaust gas generated when the solar cell is heated.
[0040] In some embodiments, reference Figure 1 The heating component 20 can be one or more of a heating wire, a heating rod or a heating ceramic.
[0041] refer to Figure 2 , Figure 2 A three-dimensional diagram of a drying oven 7 provided in an embodiment of the utility model is shown.
[0042] In some embodiments, reference Figure 1 and Figure 2 The utility model also adopts a drying furnace 7, including a transmission mechanism 70, an isolation section 71, a preheating section 72, a drying section 73, a cooling section 74, and a plurality of heating modules 1 described in the above embodiments. The plurality of heating modules 1 are arranged along the third direction ( Figure 2The first and second directions are connected in sequence (as shown in the X direction) to form a drying section 73, and the third direction, the second direction and the first direction are perpendicular to each other. The isolation section 71, the preheating section 72, the drying section 73 and the cooling section 74 are arranged in sequence along the third direction. The transmission mechanism 70 is arranged in the drying furnace 7 along the third direction to transfer the product from the isolation section 71 to the cooling section 74 and then transfer it out.
[0043] Illustratively, during the drying process of solar cells in the drying furnace 7, the solar cells pass through the isolation zone, preheating zone, constant temperature zone and cooling zone in sequence. The hollow cavity of the furnace body in each zone serves as a transmission channel of the transmission mechanism 70 and is filled with protective gas to provide gas protection for the solar cells.
[0044] In some embodiments, reference Figure 1 and Figure 2 The drying furnace 7 further includes a plurality of lifting gates 75 , and the plurality of lifting gates 75 are arranged at least one heating module 1 apart.
[0045] Exemplarily, the drying section 73 is composed of heating chambers 2 as units, and two adjacent units can be separated by a lifting gate 75 to achieve interconnection or isolation between the drying units.
[0046] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A heating module, It is characterized in that include: A heating chamber, wherein a heating component is provided inside the heating chamber for generating heating gas; a transmission chamber, the transmission chamber being used for transmitting the product therethrough; Insulation cotton, the insulation cotton is respectively arranged around the heating chamber and the transmission chamber to form a gas channel; the gas channel is used to connect the transmission chamber and the heating chamber; A charging device, the charging device is used to charge the heating module with a protective gas; A flow guiding device is used to circulate the heating gas between the heating chamber and the transmission chamber through the gas channel.
2. The heating module according to claim 1, It is characterized in that It also includes a first special gas inlet, a second special gas inlet and a special gas circulation outlet; the heating chamber is arranged on one side of the heating module along the first direction, and the guide device is arranged on the top of the heating module and is located at the top of the heating chamber along the second direction; the first special gas inlet is arranged on the same side as the guide device, and is a small-flow protective gas inlet; the second special gas inlet is arranged at the bottom of the heating module, and is a large-flow protective gas inlet; the special gas circulation outlet is arranged on the other side of the heating module along the first direction.
3. The heating module according to claim 1, It is characterized in that The gas channel includes a first channel and a second channel; the first channel is arranged in the flow guide device; the second channel includes a buffer chamber located between the heating chamber and the transmission chamber, a side chamber located between the transmission chamber and the heating module, and a bottom chamber located below the transmission chamber; the first channel is respectively connected to the heating chamber and the buffer chamber, and the bottom chamber is connected to the heating chamber.
4. The heating module according to claim 2, It is characterized in that A first mesh plate and a second mesh plate are respectively provided on both sides of the transmission chamber along the first direction; a heating plate is provided on the side of the first mesh plate facing the transmission chamber.
5. The heating module according to claim 3, It is characterized in that A flow guide cover is provided at the connection point between the first channel and the buffer chamber; and the outlet end of the flow guide cover is arranged downward or upward.
6. The heating module according to claim 1, It is characterized in that It also includes a waste outlet; the waste outlet is arranged on the top of the heating module and is located above the transmission chamber.
7. The heating module according to claim 1, It is characterized in that The heating component may be one or more of a heating wire, a heating rod or a heating ceramic.
8. A drying furnace, It is characterized in that It comprises a conveying mechanism, an isolation section, a preheating section, a drying section, a cooling section, and a plurality of heating modules as described in any one of claims 1 to 7; the plurality of heating modules are sequentially connected and arranged along a third direction to form a drying section; the isolation section, the preheating section, the drying section and the cooling section are sequentially arranged along the third direction; the conveying mechanism is arranged in the drying furnace along the third direction to transfer the product from the isolation section to the cooling section and then transfer it out.
9. The drying oven according to claim 8, It is characterized in that It also includes a plurality of lifting gates, wherein the plurality of lifting gates are arranged at least one heating module apart.