Flow directing member and liquid dispensing device
By designing the flow guide, the problems of uneven liquid distribution and air bubbles in traditional photovoltaic cell texturing machines are solved, achieving uniform liquid dispersion and effective air bubble treatment, thus improving the texturing effect of photovoltaic cells.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGWEI SOLAR ENERGY (CHENGDU) CO LID
- Filing Date
- 2025-04-29
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional photovoltaic cell texturing machines suffer from uneven chemical supply and flow, resulting in air bubbles and uneven texturing effects, which affect cell performance.
The design employs a flow guide, comprising a first truncated conical cylinder and a second truncated conical cylinder nested together and connected by a connecting plate. Through holes are provided to improve the uniformity of liquid dispersion, disperse air bubbles, and prevent the formation of large air bubbles.
It improves the uniformity of liquid dispersion, reduces the impact of air bubbles on liquid dispersion, ensures the consistency of texturing on silicon wafer surfaces, and enhances the performance of photovoltaic cells.
Smart Images
Figure CN224329868U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of liquid dispersion technology, and in particular to a flow guide and a liquid dispersion device. Background Technology
[0002] In the photovoltaic cell manufacturing process, texturing is a crucial front-end process. The main purpose of texturing is to create a pyramidal textured surface on the silicon wafer to reduce light reflection. When the texturing solution is homogeneous, a uniform texture can be formed on the silicon wafer surface, allowing incident light to be absorbed and utilized more effectively. This uniform textured structure also helps create a uniform electric field distribution, which is beneficial for the collection of photogenerated carriers, reduces the recombination probability, and thus increases the short-circuit current and fill factor of the cell, ultimately improving the photoelectric conversion efficiency.
[0003] However, traditional photovoltaic cell texturing machines have many shortcomings in the supply and flow of chemical solutions. For example, the chemical solution enters the tank only through a single inlet pipe, resulting in uneven diffusion and potentially causing some areas to have excessively high concentrations while others have excessively low concentrations. Furthermore, the flow of the chemical solution within the tank is unstable, and large air bubbles can appear in the supply pipes. These combined factors often create eddies or dead zones, leading to significant differences in the flow velocity and direction of the chemical solution around the silicon wafer. This results in uneven texturing effects and severely impacts the performance of the photovoltaic cells. Utility Model Content
[0004] Based on this, this application provides a guide element and a liquid dispersion device that can uniformly disperse bubbles and improve the uniformity of liquid dispersion.
[0005] In a first aspect, this application provides a flow guide, the flow guide comprising:
[0006] A first truncated conical cylinder has an opening area near its top opening, and the opening area has a plurality of first through holes.
[0007] The second truncated conical tube is embedded inside the first truncated conical tube, and the second truncated conical tube has multiple second through holes.
[0008] A connecting plate is disposed between the first truncated conical cylinder and the second truncated conical cylinder, and is used to connect the first truncated conical cylinder and the second truncated conical cylinder.
[0009] In some embodiments, the top opening diameter of the first truncated conical tube is 0.5cm to 0.8cm.
[0010] In some embodiments, the bottom opening diameter of the first truncated conical tube is 1.2cm to 1.5cm.
[0011] In some embodiments, the top opening diameter of the second truncated conical tube is 0.2 cm to 0.3 cm.
[0012] In some embodiments, the bottom opening diameter of the second truncated conical tube is 0.7cm to 0.9cm.
[0013] In some embodiments, the size of the opening area in the axial direction of the first truncated conical cylinder is 1.0 cm to 1.6 cm.
[0014] In some embodiments, the radial distance between the first truncated conical tube and the second truncated conical tube is 0.5 cm to 0.8 cm.
[0015] In some embodiments, the distance between the plane containing the bottom opening of the first truncated conical tube and the plane containing the bottom opening of the second truncated conical tube is 0.5cm to 0.8cm.
[0016] In some embodiments, the connecting plate has multiple third through holes.
[0017] In some embodiments, one end of the connecting plate is connected to the bottom edge of the first truncated conical cylinder, and the other end is connected to the bottom edge of the second truncated conical cylinder.
[0018] Secondly, this application provides a liquid dispersion device, the liquid dispersion device comprising:
[0019] The tank is equipped with an inlet pipe.
[0020] A flow guide plate is disposed in the tank, the position of the flow guide plate is higher than the liquid inlet pipe, and a plurality of flow guide elements as described in the first aspect are provided on the flow guide plate, the bottom opening of the first truncated cone-shaped cylinder faces the bottom surface of the flow guide plate.
[0021] In some embodiments, the bottom edge of the opening area in the first truncated conical tube is flush with the top surface of the guide plate.
[0022] In some embodiments, the spacing between adjacent flow guides is 1.0cm to 1.5cm.
[0023] In some embodiments, the liquid dispersion device further includes a replenishment tray connected to the inlet pipe and located between the guide plate and the bottom of the tank.
[0024] The replenishment tray includes a cylindrical shell, and the top and sides of the cylindrical shell are provided with multiple dispersion holes.
[0025] Compared with traditional technologies, this application has at least the following beneficial effects:
[0026] This application employs a first truncated conical cylinder and a second truncated conical cylinder nested together and connected by a connecting plate. By opening a first through hole in the opening area of the first truncated conical cylinder and a second through hole in the second truncated conical cylinder, the liquid enters through the bottom opening of the second truncated conical cylinder, is dispersed through the second through hole, enters the area between the first and second truncated conical cylinders, and is discharged through the top opening of the first truncated conical cylinder and the first through hole in the opening area. This effectively improves the uniformity of liquid dispersion and disperses air bubbles in the liquid, preventing the formation of large air bubbles that affect liquid dispersion. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the cross-sectional structure of a flow guide provided in one embodiment of this application.
[0028] Figure 2 This is a schematic diagram of the structure of a liquid dispersion device provided in one embodiment of this application.
[0029] Figure 3 This is a schematic diagram of the structure of a guide vane provided in one embodiment of this application.
[0030] Wherein, 100-tank body; 110-inlet pipe; 200-guide plate; 210-guide component; 211-first truncated cone; 212-second truncated cone; 213-connecting plate. Detailed Implementation
[0031] The present application will be further described in detail below with reference to the accompanying drawings, embodiments, and examples. These embodiments and examples are for illustrative purposes only and are not intended to limit the scope of the present application. The purpose of providing these embodiments and examples is to enable a more thorough and comprehensive understanding of the disclosure of the present application. It should also be understood that the present application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various modifications or alterations without departing from the spirit of the present application, and the equivalent forms obtained also fall within the protection scope of the present application. Furthermore, numerous specific details are set forth in the following description to provide a fuller understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.
[0032] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0033] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "fixed," and "set" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application according to the specific circumstances.
[0034] In this application, "optionally," "optionally," and "optional" mean that something is optional, that is, it means that it is selected from either "with" or "without." If there are multiple "optional" entries in a technical solution, unless otherwise specified, and there are no contradictions or mutual constraints, each "optional" entry shall be independent.
[0035] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.
[0036] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first," "second," etc., serve only as a non-exhaustive enumeration and should be understood not to constitute a closed limitation on quantity.
[0037] All references to this application are incorporated herein by reference as if each document were individually incorporated herein by reference. Unless they conflict with the purpose and / or technical solution of this application, all cited references are incorporated herein by reference in their entirety and for all purposes. When references are cited in this application, the definitions of relevant technical features, terms, nouns, phrases, etc., are also incorporated herein by reference. Examples and preferred embodiments of the cited technical features may also be incorporated herein by reference, but only to the extent that they enable the implementation of this application. It should be understood that when the cited content conflicts with the description in this application, this application shall prevail or modifications shall be made adaptably to the description in this application.
[0038] In traditional technology, texturing solution is directly introduced into the texturing tank to texturize silicon wafers. Large air bubbles may exist in the texturing solution, affecting the uniformity of contact between the texturing solution and the silicon wafer. Moreover, the poor dispersion of the texturing solution in the tank affects the consistency of texturing on the silicon wafer.
[0039] Based on this, the first aspect of this application provides a flow guide, such as Figure 1 As shown, the flow guide 210 includes a first truncated cone 211, a second truncated cone 212, and a connecting plate 213.
[0040] The first truncated conical cylinder 211 has an opening area near its top opening, with multiple first through holes in the opening area. The second truncated conical cylinder 212 is embedded within the first truncated conical cylinder 211, and has multiple second through holes in the second truncated conical cylinder 212. A connecting plate 213 is disposed between the first truncated conical cylinder 211 and the second truncated conical cylinder 212, and is used to connect the first truncated conical cylinder 211 and the second truncated conical cylinder 212.
[0041] This application employs a first truncated conical cylinder 211 and a second truncated conical cylinder 212 nested together and connected by a connecting plate 213. A first through hole is opened in the opening area of the first truncated conical cylinder 211, and a second through hole is opened in the second truncated conical cylinder 212. Liquid enters through the bottom opening of the second truncated conical cylinder 212, is dispersed through the second through hole, enters the area between the first truncated conical cylinder 211 and the second truncated conical cylinder 212, and is discharged through the top opening of the first truncated conical cylinder 211 and the first through hole in the opening area. This effectively improves the uniformity of liquid dispersion and disperses air bubbles in the liquid, preventing the formation of large air bubbles that affect liquid dispersion.
[0042] It is understood that, in this application, a truncated conical tube refers to a conical tube with its pointed top side removed, resulting in an overall frustum or prism shape. That is, the conical tube can be conical or other prismatic shapes.
[0043] In some embodiments, such as Figure 1 The top opening diameter a1 of the first truncated conical tube 211 shown is 0.5cm~0.8cm.
[0044] In some embodiments, the bottom opening diameter b1 of the first truncated conical tube 211 is 1.2cm to 1.5cm.
[0045] Optionally, the angle between the sidewall of the first truncated conical tube 211 and the plane containing the bottom opening is 55° to 75°.
[0046] The dimensions of the first truncated conical cylinder 211 selected in this application are as described above, which effectively ensures the dispersion of the liquid discharged from the top opening.
[0047] In some embodiments, such as Figure 1 As shown, the top opening diameter a2 of the second truncated conical tube 212 is 0.2cm~0.3cm.
[0048] In some embodiments, the bottom opening diameter b2 of the second truncated conical tube 212 is 0.7cm to 0.9cm.
[0049] Optionally, the angle between the sidewall of the second truncated conical tube 212 and the plane containing the bottom opening is 55° to 75°.
[0050] The dimensions of the second truncated conical cylinder 212 selected in this application effectively ensure that the gas is uniformly dispersed and the liquid is uniformly mixed during the process of the liquid flowing through the second truncated conical cylinder 212.
[0051] In some embodiments, such as Figure 1 As shown, the dimension c of the orifice region in the axial direction of the first truncated conical cylinder 211 is 1.0 cm to 1.6 cm. This application selects the orifice region size as described above to ensure that when liquid is discharged from the top opening of the first truncated conical cylinder 211, it can be dispersed using the orifice region, thereby improving liquid dispersion and refining air bubbles.
[0052] In some embodiments, the radial distance d between the first truncated conical cylinder 211 and the second truncated conical cylinder 212 is 0.5 cm to 0.8 cm. The present application selects the radial distance between the first truncated conical cylinder 211 and the second truncated conical cylinder 212 as described above, forming a cavity between them. This allows the liquid to mix uniformly within the cavity and guides the dispersed bubbles from the second truncated conical cylinder 212, promoting bubble discharge from the opening area for further dispersion and reducing bubble size.
[0053] In some embodiments, such as Figure 1 As shown, the distance e between the plane where the bottom opening of the first truncated conical tube 211 is located and the plane where the bottom opening of the second truncated conical tube 212 is located is 0.2cm~0.3cm.
[0054] In some embodiments, the connecting plate 213 is provided with a plurality of third through holes. By providing third through holes on the connecting plate 213, liquid can enter the cavity between the first truncated cone 211 and the second truncated cone 212 through the third through holes on the connecting plate 213 when passing through the guide member 210. This not only pre-disperses the bubbles, but also improves the turbulence effect of the liquid in the cavity between the first truncated cone 211 and the second truncated cone 212, preventing bubbles from accumulating in the cavity and forming large bubbles.
[0055] In some embodiments, the diameter of the first through hole is less than or equal to the diameter of the second through hole.
[0056] In some embodiments, the diameter of the second through hole is less than or equal to the diameter of the third through hole.
[0057] Optionally, the diameter of the first through hole is 0.2cm to 0.3cm.
[0058] Optionally, the diameter of the second through hole is 0.3cm to 0.4cm.
[0059] Optionally, the diameter of the third through hole is 0.4cm to 0.5cm.
[0060] In some embodiments, one end of the connecting plate 213 is connected to the bottom edge of the first truncated conical cylinder 211, and the other end is connected to the bottom edge of the second truncated conical cylinder 212. This application utilizes the connecting plate 213 to connect the bottom edges of the first truncated conical cylinder 211 and the second truncated conical cylinder 212, effectively increasing the distance between the liquid passing through the second truncated conical cylinder 212 and then through the first truncated conical cylinder 211. Furthermore, by controlling the distance between the plane containing the bottom opening of the first truncated conical cylinder 211 and the plane containing the bottom opening of the second truncated conical cylinder 212, even if the connecting plate 213 has a certain tilt angle, the turbulence effect within the guide member 210 is effectively improved, preventing bubble accumulation and improving liquid dispersion.
[0061] A second aspect of this application provides a liquid dispersion device, such as... Figure 2 As shown, the liquid dispersion device includes a tank 100 and a guide plate 200.
[0062] The tank 100 is equipped with an inlet pipe 110 for injecting liquid. A guide plate 200 is disposed within the tank 100, and the guide plate 200 is positioned higher than the inlet pipe 110. Figure 3 As shown, the guide plate 200 is provided with a plurality of guide elements 210 as described in the first aspect, and the bottom opening of the first truncated cone-shaped cylinder 211 faces the bottom surface of the guide plate 200.
[0063] In this application, after the liquid is injected into the tank 100, it is dispersed by a guide plate 200 equipped with multiple guide elements 210, which can effectively prevent bubble accumulation, improve bubble dispersion, and reduce the impact of large bubbles on the uniformity of liquid dispersion. Furthermore, the uniformity of liquid dispersion is effectively improved after passing through the guide elements 210.
[0064] In some embodiments, the bottom edge of the opening area in the first truncated conical cylinder 211 is flush with the top surface of the guide plate 200. This application ensures that the liquid flowing out of the first through hole in the opening area can be discharged to the top side of the guide plate 200 by aligning the bottom of the opening area with the top surface of the guide plate 200.
[0065] In some embodiments, such as Figure 3 As shown, the spacing f between adjacent guide elements 210 is 1.0cm to 1.5cm. It should be noted that, in this application, the spacing between adjacent guide elements 210 is the distance between the central axes of the two guide elements 210.
[0066] In some embodiments, such as Figure 2 As shown, the liquid dispersion device also includes a replenishment tray, which is connected to the inlet pipe 110 and is located between the guide plate 200 and the bottom of the tank 100.
[0067] The replenishment tray includes a cylindrical shell, with multiple dispersion holes on the top and sides of the cylindrical shell.
[0068] This application uses a cylindrical liquid replenishment tray, which allows the liquid to be evenly dispersed into the tank 100, and then further dispersed by the guide plate 200, thus improving the liquid dispersion effect.
[0069] In some embodiments, the distance between the top of the guide plate 200 and the top of the trough 100 is 1 / 4 to 1 / 2 of the height of the trough 100.
[0070] Optionally, the distance between the flow guide plate 200 and the replenishment tray is 4cm to 6cm, for example, it can be 4.0cm, 4.5cm, 5.0cm, 5.5cm or 6.0cm. The distance between the flow guide plate 200 and the replenishment tray set as described above ensures effective prevention of liquid splashing and guides the flow, while not significantly hindering operations inside the tank 100 (such as the insertion and removal of silicon wafers).
[0071] Optionally, the diameter of the replenishment tray is 20cm to 30cm.
[0072] Optionally, the diameter of the dispersion pores is 0.5cm to 1.5cm.
[0073] Optionally, the number of dispersion holes on the top of the replenishment tray is 40 to 50, and the number of dispersion holes on the side is 10 to 20. It is understood that the dispersion holes can be evenly distributed at equal intervals on the replenishment tray.
[0074] It is understood that the inlet pipe 110 is connected to a storage tank (not shown in the figure). Depending on the different usage requirements, different liquids are stored in the storage tank.
[0075] Exemplarily, a method for texturing silicon wafers using the above-described liquid dispersion apparatus is provided, comprising the following steps:
[0076] The liquid in the storage tank is introduced into the replenishment tray, where it is dispersed into the tank 100 through the dispersion holes. The liquid then flows through the guide plate 200, texturing the silicon wafer above it. Specifically, as the liquid passes through the guide plate 200, it is first dispersed by the connecting plate 213 and the second truncated conical cylinder 212, entering the cavity between the first truncated conical cylinder 211 and the second truncated conical cylinder 212. It then enters the top side of the guide plate 200 through the first through hole and the top opening of the first truncated conical cylinder 211.
[0077] In summary, this application employs a first truncated conical cylinder 211 and a second truncated conical cylinder 212 nested together and connected by a connecting plate 213. By opening a first through hole in the opening area of the first truncated conical cylinder 211 and a second through hole in the second truncated conical cylinder 212, the liquid enters through the bottom opening of the second truncated conical cylinder 212, is dispersed through the second through hole, enters the area between the first truncated conical cylinder 211 and the second truncated conical cylinder 212, and is discharged through the top opening of the first truncated conical cylinder 211 and the first through hole in the opening area. This effectively improves the uniformity of liquid dispersion and disperses air bubbles in the liquid, preventing the formation of large air bubbles that affect liquid dispersion.
[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0079] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.
Claims
1. A flow guide, characterized in that, The flow guide (210) includes: A first truncated conical tube (211) has an opening area near its top opening, and the opening area is provided with a plurality of first through holes; The second truncated conical tube (212) is embedded in the first truncated conical tube (211), and the second truncated conical tube (212) has a plurality of second through holes. A connecting plate (213) is disposed between the first truncated cone (211) and the second truncated cone (212) and is used to connect the first truncated cone (211) and the second truncated cone (212).
2. The flow guide as described in claim 1, characterized in that, The top opening diameter of the first truncated conical tube (211) is 0.5cm to 0.8cm; and / or, The bottom opening diameter of the first truncated conical tube (211) is 1.2cm to 1.5cm; and / or, The top opening diameter of the second truncated conical tube (212) is 0.2cm to 0.3cm; and / or, The bottom opening diameter of the second truncated conical tube (212) is 0.7cm~0.9cm.
3. The flow guide as described in claim 1, characterized in that, The size of the opening area in the axial direction of the first truncated conical tube (211) is 1.0cm to 1.6cm.
4. The flow guide as described in claim 1, characterized in that, The radial distance between the first truncated conical tube (211) and the second truncated conical tube (212) is 0.5 cm to 0.8 cm; and / or, The distance between the plane where the bottom opening of the first truncated cone (211) is located and the plane where the bottom opening of the second truncated cone (212) is located is 0.5cm to 0.8cm.
5. The flow guide as described in claim 1, characterized in that, One end of the connecting plate (213) is connected to the bottom edge of the first truncated cone (211), and the other end is connected to the bottom edge of the second truncated cone (212).
6. The flow guide as described in any one of claims 1-5, characterized in that, The connecting plate (213) has multiple third through holes.
7. A liquid dispersion device, characterized in that, The liquid dispersion device includes: A tank (100) is provided with an inlet pipe (110); A guide plate (200) is disposed inside the tank (100). The position of the guide plate (200) is higher than that of the inlet pipe (110). A plurality of guide elements (210) as described in any one of claims 1-6 are provided on the guide plate (200). The bottom opening of the first truncated cone-shaped cylinder (211) faces the bottom surface of the guide plate (200).
8. The liquid dispersion apparatus as described in claim 7, characterized in that, The bottom edge of the opening area in the first truncated cone (211) is flush with the top surface of the guide plate (200).
9. The liquid dispersion apparatus as described in claim 7, characterized in that, The spacing between adjacent guide elements (210) is 1.0cm to 1.5cm.
10. The liquid dispersion apparatus according to any one of claims 7-9, characterized in that, The liquid dispersion device also includes a replenishing plate, which is connected to the inlet pipe (110) and located between the guide plate (200) and the bottom of the tank (100); The replenishment tray includes a cylindrical shell, and the top and sides of the cylindrical shell are provided with multiple dispersion holes.