Curing oven
By installing a liquid collection device at the feed inlet of the curing oven, the problem of organic matter condensing and dripping was solved, ensuring the quality and performance of silicon wafers and reducing the power requirements of the exhaust fan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALI HUASHENG NEW ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-04-28
AI Technical Summary
During the solar cell production process, the temperature difference at the feed inlet of the curing furnace causes organic matter to condense into oil stains, which drip onto the silicon wafers, affecting the structure and performance of the cells. Furthermore, the high-power exhaust fan may cause the silicon wafers to shift.
A liquid collection device, including a collection tank and connectors, is installed at the feed inlet of the curing oven to collect condensate. Organic matter is guided into the collection tank through a guide surface to reduce the risk of oil dripping.
Effective collection of condensate ensures the quality and performance of silicon wafers, prevents oil stains from forming, reduces damage to silicon wafers, and lowers the power requirements of the exhaust fan.
Smart Images
Figure CN224170684U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of curing oven technology, and specifically to a curing oven. Background Technology
[0002] In the production of solar cells, screen printing is a core process for preparing solar cell electrodes, and the printing quality directly affects the manufacturing effect of the solar cells. Photovoltaic silver paste is a special conductive paste used in the manufacture of solar cells, mainly composed of nano-silver particles, organic solvents, and binders.
[0003] In screen printing, the paste requires auxiliary materials. During the drying and curing process in the heating element, the organic solvents in the paste evaporate and are extracted from the drying and curing oven chambers by an exhaust fan. At the inlet of the curing oven, due to the significant temperature difference between the outside and inside of the oven, the organic gases condense into an oily substance, dripping down the chamber walls and potentially onto the running solar cells below. This dirt, once solidified, can easily damage the solar cell structure, preventing subsequent processes or causing damage to auxiliary materials used in later processes. Utility Model Content
[0004] This utility model aims to solve one of the technical problems in related technologies to a certain extent. To this end, this utility model provides a liquid collection device and a curing oven.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a curing oven, comprising an oven body, wherein a feed inlet is provided on one side wall of the oven body, and a liquid collection device is provided on the lower edge of the wall on the side of the feed inlet of the oven body, the liquid collection device being used to collect condensate flowing down the wall surface; the liquid collection device includes a liquid collection tank and a connecting member, the liquid collection tank including a bottom wall and a plurality of side walls arranged around the bottom wall, the side walls including a first side wall and a second side wall arranged opposite to each other along a first direction; the first side wall is fitted and connected to the outer edge of the wall surface, and the second side wall is located inside the oven body of the curing oven; the connecting member is provided on the first side wall to fix the liquid collection tank on the wall surface.
[0006] The application of this utility model has the following beneficial effects: by setting a liquid collection tank at the top edge of the feed inlet of the curing furnace, the organic matter condensed on the inner wall of the curing furnace at the feed inlet is fluid. The dripping organic oil droplets are collected in a receiving manner, reducing the risk of organic oil droplets falling onto the silicon wafer below, and ensuring the quality and performance of the silicon wafer during the production process.
[0007] Optionally, the distance between the bottom wall and the top surface of the second side wall gradually decreases from both ends of the bottom wall toward the center of the bottom wall.
[0008] Optionally, the distance between the bottom wall and the top surface of the second side wall gradually increases from both ends of the bottom wall toward the center of the bottom wall.
[0009] Optionally, the bottom wall includes a first guide surface and a second guide surface that are connected to each other. Both the first guide surface and the second guide surface are inclined relative to the height direction of the first sidewall, and the inclination directions of the first guide surface and the second guide surface relative to the height direction of the first sidewall are opposite.
[0010] Optionally, the top heights of both the first and second guide surfaces are lower than the top of the second sidewall.
[0011] Optionally, both the first guide surface and the second guide surface are inclined surfaces, and the first guide surface and the second guide surface form an obtuse angle.
[0012] Optionally, the top surface of the first sidewall is higher than the top surface of the second sidewall, and the connector is disposed on the portion of the first sidewall that is higher than the second sidewall.
[0013] Optionally, a plurality of first connecting holes are provided on the portion of the first sidewall that is higher than the second sidewall, extending through the thickness direction of the first sidewall, and second connecting holes corresponding one-to-one with the first connecting holes are provided on the wall surface; the connector passes through the first connecting holes and the second connecting holes to connect the liquid collection tank to the wall surface.
[0014] Optionally, the sidewall further includes a third sidewall and a fourth sidewall disposed opposite to each other along a second direction, the first direction intersecting the second direction, and the bottom wall, the first sidewall, the second sidewall, the third sidewall and the fourth sidewall forming a receiving cavity for receiving the condensate.
[0015] Optionally, the third sidewall and the fourth sidewall are respectively provided on both sides of the wall surface along its length direction, and the first sidewall and the second sidewall extend along the length direction of the wall surface.
[0016] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings:
[0018] Figure 1This is a rear view of the present invention.
[0019] Figure 2 This is a side view of the present invention.
[0020] Figure 3 This is a top view of the present invention.
[0021] Among them, 10 is the liquid collection tank; 11 is the first side wall; 12 is the second side wall; 13 is the bottom wall; 14 is the third side wall; 15 is the fourth side wall; 20 is the connector; 30 is the wall surface on the side of the feed inlet; 131 is the first guide surface; and 132 is the second guide surface. Detailed Implementation
[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.
[0023] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.
[0024] In related technologies, when the interior of the curing oven is heated to a certain temperature, the organic matter in the slurry becomes gaseous and volatile. This is typically exhausted through pipes via exhaust ventilation. The organic matter inside the pipes accumulates upon cooling and is then manually cleaned by maintenance personnel. However, these ventilation methods cannot completely remove the volatile organic compounds from the slurry. Furthermore, due to the significant temperature difference between the exterior and interior of the oven, the volatiles easily condense at the inlet, accumulating along the inner wall of the oven. Some of this organic matter may drip onto the silicon wafers. This can cause the following adverse effects: oil droplets can form stains on the silicon wafer surface, affecting its appearance. For silicon wafers with strict appearance requirements, this can lead to direct product scrapping. The chemical components in the oil droplets can become impurities on the silicon wafer surface, potentially altering its chemical properties and affecting the bonding performance between the silicon wafer and other materials in subsequent processes.
[0025] Secondly, relying solely on the curing oven's exhaust fan to remove the volatile organic compounds generated during the curing process would require a relatively strong fan. However, a strong fan can have adverse effects because the silicon wafers themselves are very light; excessive force can cause changes in the wafer's position, affecting the accuracy of wafer transport and causing the wafer to deviate from the production line.
[0026] In view of this, such as Figures 1 to 3As shown, an embodiment of this utility model provides a curing oven, including an oven body. A feed inlet is provided on one side wall of the oven body. The characteristic feature is that a liquid collection device is provided along the lower edge of the wall 30 on the side of the feed inlet of the oven body. The liquid collection device is used to collect condensate flowing down the wall surface. The liquid collection device includes a liquid collection tank 10 and a connecting member 20. The liquid collection tank 10 includes a bottom wall 13 and a plurality of side walls arranged around the bottom wall 13. The side walls include a first side wall 11 and a second side wall 12 arranged opposite to each other along a first direction. The first side wall 11 is fitted and connected to the outer edge of the wall 30, and the second side wall 12 is located inside the oven body of the curing oven. The connecting member 20 is provided on the first side wall 11 to fix the liquid collection tank 10 to the wall 30.
[0027] During operation, the collecting tank 10 is fixedly connected to the lower edge of the furnace wall 30 above the feed inlet using connector 20. During normal oven operation, the organic slurry is vaporized at high temperature, and the organic matter is normally extracted from the cavity by exhaust air. The cooled organic matter, in a liquid state, hangs on the inner wall of the furnace. The cooled organic matter is fluid, and the liquid flows downwards into the collecting tank 10, where it is collected. This embodiment of the invention, by setting the collecting tank 10 at the lower edge of the furnace wall above the feed inlet of the curing oven, collects the organic oil droplets dripping from the wall surface, reducing the risk of organic oil droplets falling onto the silicon wafers below. For maintenance, the collecting tank 10 can be directly disassembled using connector 20 and replaced with a new one. The old collecting tank 10 can be cleaned and reused.
[0028] In some embodiments, the distance between the bottom wall 13 and the top surface of the second side wall 12 gradually decreases from both ends of the bottom wall 13 towards its center. Specifically, the bottom wall 13 includes a first guide surface 131 and a second guide surface 132 connected to each other. Both the first guide surface 131 and the second guide surface 132 are inclined relative to the height direction of the first side wall 11, and their inclination directions relative to the height direction of the first side wall 11 are opposite. The ends of the first guide surface 131 and the second guide surface 132 that are close to each other are higher than the ends that are opposite to each other. The condensed oil droplets flowing down the inner wall of the furnace above the feed inlet slide down the first guide surface 131 and the second guide surface 132 towards both ends of the collection tank 10 in a second direction and are collected.
[0029] In other possible embodiments, the distance between the bottom wall 13 and the top surface of the second side wall 12 gradually increases from both ends of the bottom wall 13 towards its center. Specifically, the bottom wall 13 includes a first guide surface 131 and a second guide surface 132 connected to each other. Both the first guide surface 131 and the second guide surface 132 are inclined relative to the height direction of the first side wall 11, and the inclination directions of the first guide surface 131 and the second guide surface 132 relative to the height direction of the first side wall 11 are opposite. The end of the first guide surface 131 and the second guide surface 132 that is close to each other is higher than the end of the first guide surface 131 and the second guide surface 132 that is away from each other. The end of the first guide surface 131 and the second guide surface 132 that is close to each other is lower than the end of the first guide surface 131 and the second guide surface 132 that is away from each other. The condensed oil droplets flowing down the inner wall of the furnace above the feed inlet slide down the first guide surface 131 and the second guide surface 132 to the middle position of the liquid collection tank 10 and are collected.
[0030] The distance between the bottom wall 13 and the top surface of the second side wall 12 can be gradually reduced or increased from both ends of the bottom wall 13 towards the center. Both of these methods can achieve the collection of condensed oil droplets. Figure 1 The diagram shows a bottom wall of the collection tank 10 with a higher center and lower ends, where condensed oil droplets are collected towards both ends. Another form (not shown in the diagram) has a bottom wall with a lower center and higher ends, where condensed oil droplets are collected towards the center. In practical applications, when the collection tank 10 is long, collecting liquid from the center downwards towards both ends avoids uneven stress on the collection tank 10 that might result from liquid concentration in the center. The collected liquid is evenly distributed at both ends of the collection tank 10, resulting in a more balanced force on the entire tank and enhancing the stability of the entire device.
[0031] In some embodiments, the top heights of the first guide surface 131 and the second guide surface 132 are both lower than the top of the second sidewall.
[0032] In some embodiments, both the first guide surface 131 and the second guide surface 132 are inclined surfaces, and the first guide surface 131 and the second guide surface 132 form an obtuse angle.
[0033] In some embodiments, the top surface of the first sidewall 11 is higher than the top surface of the second sidewall 12, and the connector 20 is disposed on the portion of the first sidewall 11 that is higher than the second sidewall 12. A plurality of first connecting holes are provided on the portion of the first sidewall 11 that is higher than the second sidewall 12, extending along the thickness direction of the first sidewall 11. The wall surface 30 is provided with second connecting holes that correspond one-to-one with the first connecting holes, extending along the thickness direction of the wall surface 30. The connector 20 is a threaded connector 20, and both the first and second connecting holes are threaded holes. The connector 20 passes through the first and second connecting holes to connect the liquid collection tank 10 to the wall surface 30.
[0034] In some embodiments, the sidewall further includes a third sidewall 14 and a fourth sidewall 15 disposed opposite to each other along a second direction, the first direction intersecting the second direction, and the bottom wall 13, the first sidewall 11, the second sidewall 12, the third sidewall 14, and the fourth sidewall 15 forming a receiving cavity for accommodating the condensate. The third sidewall 14 and the fourth sidewall 15 are respectively disposed on both sides of the wall surface 30 along its length direction, and the first sidewall 11 and the second sidewall 12 both extend along the length direction of the wall surface 30.
[0035] Specifically, the second direction is parallel to the length direction of the furnace wall of the curing oven, and the first direction is parallel to the width direction of the furnace wall of the curing oven. The first side wall 11 is attached to the outer wall above the feed inlet and extends along the length direction of the side wall. The bottom wall 13 is located inside the furnace body. The condensed oil droplets flowing down from the inner wall of the furnace body fall onto the bottom wall 13 of the liquid collection tank 10 and are guided by the first guide surface 131 and the second guide surface 132 of the bottom wall 13 to the two ends of the receiving cavity of the liquid collection tank 10 for collection. After the liquid in the receiving cavity of the liquid collection tank 10 reaches the preset height, the operator can remove the liquid collection tank 10 from the curing oven by screwing on the connector 20 and replace it with a new liquid collection tank 10 to connect to the curing oven.
[0036] This invention relates to a curing oven equipped with a liquid collection tank 10. Under normal oven operation, there is a significant temperature difference between the outside and inside of the oven body at the feed inlet. The organic slurry inside the oven body is vaporized at high temperature. The organic matter is normally extracted from the cavity by exhaust air. The cooled organic matter is in a liquid state and hangs on the inner wall of the oven body at the feed inlet. The cooled organic matter is fluid and flows downwards into the liquid collection tank 10, where it is collected, reducing the risk of organic oil dripping onto the silicon wafers. The exhaust fan of the curing oven equipped with the liquid collection tank 10 does not need to be set with too high a suction power, while ensuring the quality and performance of the silicon wafers during the production process.
[0037] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.
Claims
1. A curing oven, comprising an oven body, wherein a feed inlet is provided on one side wall of the oven body, characterized in that, The furnace body is provided with a liquid collection device on the lower edge of the wall (30) on the side of the feed inlet. The liquid collection device is used to collect the condensate flowing down the wall (30). The liquid collection device includes a liquid collection tank (10) and a connector (20). The liquid collection tank (10) includes a bottom wall (13) and a plurality of side walls arranged around the bottom wall (13). The side walls include a first side wall (11) and a second side wall (12) arranged opposite to each other in a first direction. The first side wall (11) is fitted and connected to the outer edge of the wall (30). The second side wall (12) is located inside the furnace body of the curing furnace. The connector (20) is arranged on the first side wall (11) to fix the liquid collection tank (10) on the wall (30).
2. The curing oven according to claim 1, characterized in that, The distance between the bottom wall (13) and the top surface of the second side wall (12) gradually decreases from both ends of the bottom wall (13) toward the center of the bottom wall (13).
3. The curing oven according to claim 1, characterized in that, The distance between the bottom wall (13) and the top surface of the second side wall (12) gradually increases from both ends of the bottom wall (13) toward the center of the bottom wall (13).
4. The curing oven according to any one of claims 1-3, characterized in that, The bottom wall (13) includes a first guide surface (131) and a second guide surface (132) connected to each other. The first guide surface (131) and the second guide surface (132) are both inclined relative to the height direction of the first side wall (11), and the inclination directions of the first guide surface (131) and the second guide surface (132) relative to the height direction of the first side wall (11) are opposite.
5. The curing oven according to claim 4, characterized in that, The top heights of the first guide surface (131) and the second guide surface (132) are both lower than the top of the second sidewall.
6. The curing oven according to claim 4, characterized in that, Both the first guide surface (131) and the second guide surface (132) are inclined surfaces, and the first guide surface (131) and the second guide surface (132) form an obtuse angle.
7. The curing oven according to claim 1, characterized in that, The top surface of the first sidewall (11) is higher than the top surface of the second sidewall (12), and the connector (20) is disposed on the part of the first sidewall (11) that is higher than the second sidewall (12).
8. The curing oven according to claim 7, characterized in that, A plurality of first connecting holes are provided on the portion of the first sidewall (11) that is higher than the second sidewall (12), and a second connecting hole is provided on the wall surface (30) that corresponds one-to-one with the first connecting hole; the connector (20) passes through the first connecting hole and the second connecting hole to connect the liquid collection tank (10) and the wall surface (30).
9. The curing oven according to claim 1, characterized in that, The sidewall also includes a third sidewall (14) and a fourth sidewall (15) arranged opposite each other along the second direction, the first direction intersecting the second direction, and the bottom wall (13), the first sidewall (11), the second sidewall (12), the third sidewall (14) and the fourth sidewall (15) forming a receiving cavity for receiving the condensate.
10. The curing oven according to claim 9, characterized in that, The third sidewall (14) and the fourth sidewall (15) are respectively located on both sides of the wall surface (30) along the length direction, and the first sidewall (11) and the second sidewall (12) extend along the length direction of the wall surface (30).