Texturing groove bubbling pipe used for solar cell production and circulating system of texturing groove bubbling pipe

Abstract

The utility model discloses a texturing groove bubbling pipe for solar cell production and a circulating system thereof. The bubbling pipe comprises a bubbling pipe section and a gas guide pipe, the two ends of the air blowing pipe section are open, an air blowing cavity is formed in the air blowing pipe section, and air blowing holes are formed in the surface of the air blowing pipe section and communicate with the air blowing cavity. An air guide pipe is connected between every two adjacent air blowing pipe sections, and the air guide pipes are communicated with openings in the ends of the air blowing pipe sections. According to the utility model, nitrogen is introduced into the bubbling pipe to carry out air-blowing stirring, so that a solution in the texturing groove is more uniform, and meanwhile, the circulating system can recycle the nitrogen.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell manufacturing, and more specifically to a velvet bubbling tube for producing solar cells and a circulation system thereof. Background Art

[0002] The preparation of solar cells includes processes such as texturing, diffusion, coating, screen printing, sintering, etc. Among them, the purpose of texturing is to form a velvet surface on the surface of the silicon wafer.

[0003] The texturing process is usually carried out in a texturing tank, which contains a reaction liquid. The silicon wafer reacts in the reaction liquid to form a texture surface. The uniformity of the reaction liquid affects the uniformity of the silicon wafer texture surface. If the concentration of the reaction liquid is uneven, the pyramids on the surface of the silicon wafer will be uneven, which will affect the subsequent process and conversion rate. If the solution is made uniform by stirring the reaction liquid, it is easy to cause fragmentation.

[0004] Therefore, it is an urgent problem for technicians in this field to develop a texturing tank bubbling tube and its circulation system for solar cell production that can stir the reaction solution evenly. Utility Model Content

[0005] In view of this, the utility model provides a texturing tank bubbling tube and a circulation system thereof for producing solar cell sheets, which can stir a reaction solution uniformly.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A texturing tank bubbling tube for producing solar cell sheets, comprising:

[0008] An air inflation pipe section, wherein both ends of the air inflation pipe section are open, an air inflation cavity is provided inside the air inflation pipe section, and air inflation holes are provided on the surface of the air inflation pipe section, and the air inflation holes are connected to the air inflation cavity;

[0009] An air guide pipe is connected between two adjacent air blowing pipe sections, and the air guide pipe is communicated with an opening at the end of the air blowing pipe section.

[0010] The beneficial effect of adopting the above technical solution is that the air blowing pipe sections in the utility model are connected through the air guide pipe, and nitrogen will bubble out from the bulging holes to make the solution in the texturing tank more uniform, thereby achieving a better texturing effect on the surface of the silicon wafer.

[0011] Preferably, the end of the air inflation pipe segment is connected to a connecting pipe segment, and the connecting pipe segment is placed between two adjacent air inflation pipe segments. Both ends of the connecting pipe segment are open, and a cavity is provided therein, and the air guide pipe is placed in the cavity.

[0012] Preferably, plug-in blocks are extended outward from both ends of the air-inflating pipe section, and the plug-in blocks are plugged into the openings at the ends of the connecting pipe section. The provision of the plug-in blocks can make the connection between the air-inflating pipe section and the connecting pipe section more stable.

[0013] Preferably, a threaded interface is provided at the connection between the plug-in block and the air guide pipe, and a threaded joint is provided at the end of the air guide pipe, and the threaded joint is threadedly connected in the threaded interface, so that the connection between the air guide pipe and the air blowing pipe section is more stable.

[0014] Preferably, the outer surface of the connecting pipe section is provided with a liquid inlet hole, and the liquid inlet hole is connected to the cavity of the connecting pipe section. Liquid can enter the cavity of the connecting pipe section, increasing the weight of the connecting pipe section, so that the connecting pipe section can be stably arranged at the bottom of the texturing tank.

[0015] Preferably, a gasket is provided at the plug-in surface between the plug-in block and the open end of the connecting pipe section. The provision of the gasket can increase the friction force at the connection between the connecting pipe section and the air-blowing pipe section, and increase the stability of the connection between the connecting pipe section and the air-blowing pipe section.

[0016] Preferably, the connecting pipe section and the air blowing pipe section are triangular in shape, and the bottom of the connecting pipe section and the air blowing pipe section are both provided with suction cups. The provision of the suction cups can firmly set the connecting pipe section and the air blowing pipe section at the bottom of the texturing tank, and facilitate installation and removal.

[0017] A bubbling tube circulation system for a texturing tank used in the production of solar cell sheets, comprising a bubbling tube;

[0018] The air inlet end of the bubbling tube is connected to the air inlet pipe, and the air outlet end is connected to the air outlet pipe; the bubbling tube is adsorbed on the bottom of the texturing tank; an air pump and a collection tank are provided outside the texturing tank;

[0019] The air pump is connected to the air inlet pipe;

[0020] The air inlet end of the collecting tank is communicated with the air outlet pipe, and the air outlet end is communicated with the air inlet end of the air pump.

[0021] Preferably, a pressure valve is provided on the air outlet pipe, and the pressure valve is connected to the air inlet end of the collection tank; a pressure gauge is provided outside the collection tank. The excess gas that is not blown out in the air blowing pipe section can be collected and reused, which can save costs.

[0022] Preferably, solenoid valves are provided at the air inlet end of the air inlet pipe, between the collecting tank and the air pump.

[0023] It can be seen from the above technical solution that, compared with the prior art, the utility model discloses a texturing tank bubbling tube and a circulation system for solar cell production, which has the following beneficial effects:

[0024] (1) In the present invention, nitrogen is introduced through a bubbling tube for aeration and stirring, so that the solution in the texturing tank is more uniform;

[0025] (2) The bubbling tube is adsorbed on the bottom of the texturing tank by a suction cup, which is convenient for installation, disassembly and replacement;

[0026] (3) The bubbling tube and the collection tank form a circulation system, which can recycle and reuse the residual nitrogen. At the same time, the blockage of the bubbling tube can be detected and dealt with in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 The accompanying drawing is a schematic diagram of the structure of the circulation system provided by the utility model;

[0029] Figure 2 The accompanying drawing is a schematic diagram of the structure inside the texturing tank in the circulation system provided by the utility model;

[0030] Figure 3 The accompanying drawing is a schematic diagram of the structure of the bubbling tube provided by the utility model;

[0031] Figure 4 The accompanying drawing is an internal cross-sectional view of the bubbling tube provided by the utility model;

[0032] Figure 5 The accompanying drawing is a structural schematic diagram of the air blowing pipe section provided by the utility model;

[0033] Figure 6 The accompanying drawing is a schematic structural diagram of the connecting pipe section provided by the utility model.

[0034] Among them, in the figure,

[0035] 1- tracheal segment;

[0036] 11-air chamber; 12-air hole; 13-connection block; 14-threaded interface;

[0037] 2-trachea;

[0038] 3- Connect the pipe sections;

[0039] 31-cavity; 32-liquid inlet;

[0040] 4-suction cup; 5-inlet pipe; 6-outlet pipe; 7-velvet making tank; 8-air pump; 9-collection tank; 10-pressure valve; 011-pressure gauge; 012-solenoid valve. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] The utility model discloses a texturing tank bubbling tube for producing solar cell sheets, comprising:

[0043] The air-inflating pipe section 1 is open at both ends, and an air-inflating cavity 11 is provided inside the air-inflating pipe section 1. The air-inflating holes 12 are provided on the surface of the air-inflating pipe section 1, and the air-inflating holes 12 are connected to the air-inflating cavity 11;

[0044] An air guide pipe 2 is connected between two adjacent air blowing pipe sections 1 , and the air guide pipe 2 is communicated with an opening at the end of the air blowing pipe section 1 .

[0045] In order to further optimize the above technical solution, the end of the air inflation pipe segment 1 is connected to a connecting pipe segment 3, and the connecting pipe segment 3 is placed between two adjacent air inflation pipe segments 1. Both ends of the connecting pipe segment 3 are open, and a cavity 31 is provided inside, and the air guide tube 2 is placed in the cavity 31.

[0046] In order to further optimize the above technical solution, plug-in blocks 13 are respectively extended outward from both ends of the air blowing pipe section 1 , and the plug-in blocks 13 are plugged into the openings at the ends of the connecting pipe section 3 .

[0047] In order to further optimize the above technical solution, a threaded interface 14 is provided at the connection between the plug-in block 13 and the air duct 2 , and a threaded joint is provided at the end of the air duct 2 , and the threaded joint is threadedly connected in the threaded interface 14 .

[0048] In order to further optimize the above technical solution, a liquid inlet hole 32 is opened on the outer surface of the connecting pipe section 3, and the liquid inlet hole 32 is connected to the cavity 31 of the connecting pipe section 3. Two liquid inlet holes 32 are provided to ensure that the solution can enter the cavity 31.

[0049] In order to further optimize the above technical solution, a gasket is provided at the plug-in surface between the plug-in block 13 and the open end of the connecting pipe section 3 .

[0050] In order to further optimize the above technical solution, the outside of the connecting pipe section 3 and the air bubbling pipe section 1 is triangular in shape, and the bottom of the connecting pipe section 3 and the air bubbling pipe section 1 is provided with a suction cup 4. The triangular shape of the connecting pipe section 3 and the air bubbling pipe section 1 facilitates the installation of the suction cup 4. The air inlet pipe 5 and the air outlet pipe 6 enter the texturing tank 7 along the side wall of the texturing tank 7, and the bubbling tube is installed at the bottom of the texturing tank 7 by adsorption. Without changing the original structure of the texturing tank 7, it is convenient to install the bubbling tube. When the bubbling tube is blocked, it is also convenient to replace the bubbling tube.

[0051] A bubbling tube circulation system for a texturing tank used in the production of solar cell sheets, comprising a bubbling tube;

[0052] The air inlet end of the bubbling tube is connected to the air inlet pipe 5, and the air outlet end is connected to the air outlet pipe 6; the bubbling tube is adsorbed on the bottom of the texturing tank 7; the outside of the texturing tank 7 is provided with an air pump 8 and a collection tank 9;

[0053] The air intake pipe 5 is connected to an air pump 8;

[0054] The air inlet end of the collecting tank 9 is connected to the air outlet pipe 6 , and the air outlet end is connected to the air inlet end of the air pump 8 .

[0055] In order to further optimize the above technical solution, a pressure valve 10 is provided on the gas outlet pipe 6, and the pressure valve 10 is connected to the gas inlet end of the collection tank 9; a pressure gauge 011 is provided outside the collection tank 9. The pressure valve 10 can be opened when the pressure is greater than the set value. Since the bubbling tube is easily corroded in the solution, it is easy to cause the bubbling hole 12 to be blocked. The collection tank 9 can not only collect the gas remaining in the bubbling tube, but also judge the blockage of the bubbling tube according to the pressure of the gas in the collection tank 9 and the time of pressure change, which can avoid the situation of stirring failure caused by a long time.

[0056] In order to further optimize the above technical solution, a solenoid valve 012 is provided between the air intake end of the air intake pipe 5 , the collecting tank 9 and the air pump 8 .

[0057] Working process of the bubbling tube circulation system of the cashmere making tank:

[0058] The solenoid valve 012 on the air intake pipe 5 is opened, and the nitrogen enters from the air intake pipe 5 through the air pump 8 and enters the bubbling tube for bubbling. At this time, the pressure valve 10 is closed. When the nitrogen in the bubbling tube cannot be completely discharged and the pressure at the pressure valve 10 reaches the upper limit value, the pressure valve 10 is opened, and the excess nitrogen is stored in the collecting tank 9. The pressure gauge 011 will detect the pressure value in the collecting tank 9. When the pressure value in the collecting tank 9 reaches the set value, the solenoid valve 012 at the air intake pipe 5 is closed, and the solenoid valve 012 at the collecting tank 9 is opened, and nitrogen is introduced into the bubbling tube through the collecting tank 9 to realize the recycling of nitrogen. When the nitrogen in the collecting tank 9 is exhausted, the solenoid valve 012 at the collecting tank 9 is closed, and the solenoid valve 012 at the air intake pipe 5 is opened to continue to introduce nitrogen into the bubbling tube.

[0059] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A texturing tank bubbling tube for solar cell production, characterized in that: include: An air inflation pipe section (1), the air inflation pipe section (1) being open at both ends and having an air inflation cavity (11) disposed therein, and an air inflation hole (12) being disposed on the surface of the air inflation pipe section (1), the air inflation hole (12) being in communication with the air inflation cavity (11); An air guide pipe (2) is connected between two adjacent air blowing pipe sections (1), and the air guide pipe (2) is in communication with an opening at the end of the air blowing pipe section (1).

2. The texturing tank bubbling tube for solar cell production according to claim 1, characterized in that: The ends of the air blowing pipe sections (1) are connected to connecting pipe sections (3), the connecting pipe sections (3) are placed between two adjacent air blowing pipe sections (1), the two ends of the connecting pipe sections (3) are open, a cavity (31) is provided therein, and the air guide pipe (2) is placed in the cavity (31).

3. The texturing tank bubbling tube for solar cell production according to claim 2, characterized in that: Plug-in blocks (13) are respectively extended outward from both ends of the air blowing pipe section (1), and the plug-in blocks (13) are plugged into openings at the ends of the connecting pipe section (3).

4. The texturing tank bubbling tube for solar cell production according to claim 3, characterized in that: A threaded interface (14) is provided at the connection point between the plug-in block (13) and the air duct (2), and a threaded joint is provided at the end of the air duct (2), and the threaded joint is threadedly connected in the threaded interface (14).

5. A texturing tank bubbling tube for solar cell production according to any one of claims 2 to 4, characterized in that: The outer surface of the connecting pipe section (3) is provided with a liquid inlet hole (32), and the liquid inlet hole (32) is communicated with the cavity (31) of the connecting pipe section (3).

6. The texturing tank bubbling tube for solar cell production according to claim 4, characterized in that: A gasket is provided at the plug-in surface between the plug-in block (13) and the open end of the connecting pipe section (3).

7. The texturing tank bubbling tube for solar cell production according to claim 6, characterized in that: The exterior of the connecting pipe section (3) and the air blowing pipe section (1) are triangular in shape, and suction cups (4) are provided at the bottom of the connecting pipe section (3) and the air blowing pipe section (1).

8. A texturing tank bubbling tube circulation system for solar cell production, characterized in that: A bubbling tube comprising any one of claims 1 to 7; The air inlet end of the bubbling tube is connected to the air inlet pipe (5), and the air outlet end is connected to the air outlet pipe (6); the bubbling tube is adsorbed on the bottom of the texturing tank (7); an air pump (8) and a collection tank (9) are provided outside the texturing tank (7); The air pump (8) is connected to the air inlet pipe (5); The air inlet end of the collecting tank (9) is connected to the air outlet pipe (6), and the air outlet end is connected to the air inlet end of the air pump (8).

9. The texturing tank bubbling tube circulation system for solar cell production according to claim 8, characterized in that: The air outlet pipe (6) is provided with a pressure valve (10), and the pressure valve (10) is connected to the air inlet end of the collection tank (9); a pressure gauge (011) is provided outside the collection tank (9).

10. The texturing tank bubbling tube circulation system for solar cell production according to claim 8, characterized in that: A solenoid valve (012) is provided between the air inlet end of the air inlet pipe (5), the collecting tank (9) and the air pump (8).

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