Etching equipment for producing crystalline silicon solar cell

Abstract

The utility model discloses an etching device for silicon crystal solar cell production, which relates to the technical field of solar cell production and comprises an etching device body, a diversion trench arranged on the etching device body and a filter screen arranged on the diversion trench. A filtering mechanism is arranged between the etching equipment body and the liquid storage tank and comprises a filtering pipeline, and the filtering pipeline is arranged between the diversion trench and the liquid storage tank; the connecting assemblies are arranged at the two ends of the filtering pipeline, and the connecting assemblies are used for assembling the filtering pipeline; the collecting assembly is arranged at the bottom of the filtering pipeline, and the collecting assembly is used for collecting impurities. By arranging the filtering mechanism, impurities in the etching liquid can be conveniently filtered through the filtering assembly, the etching liquid is prevented from entering circulation again, the impurities are conveniently collected through cooperation of the filtering pipeline and the collecting assembly, and later discharging is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell production, in particular to an etching device for producing silicon crystal solar cells. Background Art

[0002] At present, with the development of the photovoltaic industry, the use of solar cells is becoming more and more widespread. Solar cells are a type of photoelectric semiconductor sheet that uses sunlight to generate electricity directly. They are also called "solar chips" or "photovoltaic cells". As long as they are illuminated under certain illumination conditions, they can instantly output voltage and generate current in the presence of a circuit. In physics, this is called solar photovoltaics.

[0003] For example, an etching device for solar cells disclosed in the authorization announcement number CN213483719U can drive the solar cells to rotate by setting a rotating component, so that the etching solution inside the water tank can be evenly sprayed on the surface of the solar cell through the nozzle. The spraying method replaces the traditional etching inside the etching groove, reduces the amount of etching solution used, reduces the processing cost, and improves the stability of the solar cell during processing, preventing the solar cell from being over-engraved.

[0004] However, the etching liquid passes through the filter and falls into the etching liquid tank, and is then pumped out by a water pump for circulating spraying. The filter relies on a vibrator to vibrate the impurities and drop them, which will cause the impurities to circulate again, which will not only cause the nozzle to be blocked, but also cause the nozzle to be unable to spray evenly, and also cause damage to the nozzle, and even affect the etching process of solar cells. For this reason, we propose an etching device for the production of silicon crystal solar cells. Utility Model Content

[0005] The purpose of the utility model is to provide an etching device for the production of silicon crystal solar cells. By setting a filtering mechanism, it is convenient to use a filtering component to filter impurities in the etching solution to prevent it from entering the circulation again. By using the cooperation of the filtering pipeline and the collecting component, the impurities can be conveniently collected for later discharge.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an etching device for producing silicon crystal solar cells, comprising an etching device body, a guide groove arranged on the etching device body, and a filter screen arranged on the guide groove, a liquid storage tank is arranged on one side of the guide groove, a filtering mechanism is arranged between the etching device body and the liquid storage tank, and the filtering mechanism comprises:

[0007] A filter pipe, wherein the filter pipe is arranged between the guide groove and the liquid storage tank;

[0008] A connecting assembly, both ends of the filter pipe are provided with a connecting assembly, and the connecting assembly is used to assemble the filter pipe;

[0009] A collecting component, which is disposed at the bottom of the filtering pipe and is used to collect impurities;

[0010] The filter component is arranged inside the connecting component and is used for filtering impurities.

[0011] Preferably, the filtering pipe includes a U-shaped pipe and two connecting pipes arranged at the ends, one end of one connecting pipe is fixedly connected to the side of the liquid storage tank, and one end of the other connecting pipe is fixedly connected to one side of the guide groove.

[0012] Preferably, the collecting assembly includes a connecting sleeve communicated with the bottom of the filter pipe, a collecting cylinder threadedly connected to the outer surface of the connecting sleeve, a conical sleeve fixedly arranged inside the connecting sleeve, a fixing ring fixedly connected to one side of the connecting sleeve, and a rotating assembly fixedly connected to the bottom end of the collecting cylinder.

[0013] Preferably, the connection assembly includes a connection end fixedly connected to the end of the connection pipe and a connection cover sleeved on the end of the U-shaped pipe, and the outer surface of the connection end is connected to the internal thread of the connection cover.

[0014] Preferably, the rotating assembly is composed of a fixed round block fixedly connected to the bottom end of the collecting cylinder and a plurality of protrusions fixedly connected to the outer side of the fixed round block, and the collecting assembly is arranged at the bottom of the filtering pipe.

[0015] Preferably, the filter assembly is arranged inside one of the connecting assemblies, and the filter assembly includes a mounting ring arranged at the end of the connecting cover, a filter sleeve fixedly connected to the bottom of the mounting ring, filter cotton arranged inside the filter sleeve, a connecting ring connected to the inner thread of the mounting ring, a handle fixedly connected to the top of the connecting ring, and a circular grille arranged inside the connecting ring.

[0016] Technical effects and advantages of the utility model:

[0017] The etching liquid passes through the filter mesh and enters the guide groove, and then enters the filter pipe. The impurities in the etching liquid will be filtered by the filter component to avoid repeated entry into the etching liquid circulation, and the filtered impurities will fall into the front of the collection component and be collected by the collection component. The filter pipe can be split later by using the connecting component. This design is not only convenient for filtering the impurities in the etching liquid and preventing the impurities from entering the etching liquid circulation, but also convenient for the later discharge of impurities, thereby collecting and processing the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 2 For this utility model Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0020] Figure 3 For this utility model Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0021] Figure 4 For this utility model Figure 3 Schematic diagram of the partial enlarged structure at point C in the middle.

[0022] Figure 5 This is a schematic diagram of the structure of the tapered sleeve of the utility model.

[0023] In the figure: 1. Etching equipment body; 2. Filter screen; 3. Guide groove; 4. Filter pipe; 401. U-shaped tube; 402. Connecting pipe; 5. Liquid storage tank; 6. Collecting assembly; 601. Connecting sleeve; 602. Conical sleeve; 603. Fixed ring; 604. Collecting cylinder; 605. Rotating assembly; 7. Connecting assembly; 701. Connecting end; 702. Connecting cover; 8. Filter assembly; 801. Mounting ring; 802. Filter sleeve; 803. Filter cotton; 804. Connecting ring; 805. Circular grille; 806. Handle. DETAILED DESCRIPTION

[0024] 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.

[0025] The utility model provides Figure 1-5The etching device for producing silicon crystalline solar cells shown in the figure comprises an etching device body 1, a guide groove 3 arranged on the etching device body 1 and a filter screen 2 arranged on the guide groove 3, a liquid storage tank 5 is arranged on one side of the guide groove 3, and a filtering mechanism is arranged between the etching device body 1 and the liquid storage tank 5, and the filtering mechanism comprises: a filtering pipe 4, the filtering pipe 4 is arranged between the guide groove 3 and the liquid storage tank 5; a connecting component 7, both ends of the filtering pipe 4 are provided with the connecting component 7, and the connecting component 7 is used to assemble the filtering pipe 4; a collecting component 6, the collecting component 6 is arranged at the bottom of the filtering pipe 4, and the collecting component 6 is used to Collect impurities; filter assembly 8, filter assembly 8 is arranged inside connecting assembly 7, and filter assembly 8 is used to filter impurities; etching liquid is sprayed out by the nozzle to etch the solar cell, the etching liquid passes through the filter mesh 2 and enters the guide groove 3, and then the etching liquid enters the filter pipe 4, and the impurities in the etching liquid will be filtered by the filter assembly 8, so as to avoid repeated entry into the etching liquid circulation, and the filtered impurities will fall into the front of the collection assembly 6, so as to be collected by the collection assembly 6, and the filter pipe 4 can be disassembled by the connecting assembly 7 later, so as to perform further cleaning operations. The nozzle is the prior art of the public document in the background technology, and the storage tank 5 is provided with a water pump, and the etching liquid is transported to the nozzle by the water pump.

[0026] It should be further explained that the filter pipe 4 includes a U-shaped pipe 401 and two connecting pipes 402 arranged at the end, one end of one connecting pipe 402 is fixedly connected to the side of the liquid storage tank 5, and one end of the other connecting pipe 402 is fixedly connected to one side of the guide groove 3; the U-shaped pipe 401 facilitates the sedimentation of impurities, and settles to the bottom of the filter pipe 4, thereby facilitating collection by the collection component 6.

[0027] It should be noted that the collecting assembly 6 includes a connecting sleeve 601 communicated with the bottom of the filtering pipe 4, a collecting barrel 604 threadedly connected to the outer surface of the connecting sleeve 601, a conical sleeve 602 fixedly arranged inside the connecting sleeve 601, a fixing ring 603 fixedly connected to one side of the connecting sleeve 601 and a rotating assembly 605 fixedly connected to the bottom end of the collecting barrel 604; the rotating assembly 605 is composed of a fixed round block fixedly connected to the bottom end of the collecting barrel 604 and a plurality of protrusions fixedly connected to the outside of the fixed round block, and the collecting assembly 6 is arranged at the bottom of the filtering pipe 4; by rotating the rotating assembly 605, the collecting barrel 604 is rotated until the collecting barrel 604 is separated from the connecting sleeve 601, so as to facilitate the cleaning of impurities in the collecting barrel 604 and the collecting assembly 6, and the design of the conical sleeve 602 facilitates the shielding of impurities in the collecting barrel 604 to prevent further upward movement, and at the same time, the conical sleeve 602 also prevents the etching liquid from splashing when it is discharged from the connecting sleeve 601, thereby reducing the discharge port diameter of the etching liquid.

[0028] Furthermore, the connecting assembly 7 includes a connecting end 701 fixedly connected to the end of the connecting pipe 402 and a connecting cover 702 sleeved on the end of the U-shaped tube 401, and the outer surface of the connecting end 701 is connected to the internal thread of the connecting cover 702; by rotating the connecting cover 702, the connecting cover 702 is separated from the connecting end 701, thereby disassembling the U-shaped tube 401 for later replacement or cleaning of its interior.

[0029] It should be noted that the filter assembly 8 is arranged inside one of the connection assemblies 7, and the filter assembly 8 includes a mounting ring 801 arranged at the end of the connection cover 702, a filter sleeve 802 fixedly connected to the bottom of the mounting ring 801, filter cotton 803 arranged inside the filter sleeve 802, a connecting ring 804 threadedly connected to the inside of the mounting ring 801, a handle 806 fixedly connected to the top of the connecting ring 804, and a circular grille 805 arranged inside the connecting ring 804; when the etching liquid passes through the filter assembly 8, it will be first intercepted by the filter sleeve 802 and then intercepted by the filter cotton 803, thereby achieving a good filtering effect. Later, when the U-shaped tube 401 is disassembled, the filter sleeve 802 can be completely removed, and then the handle 806 can be rotated to separate the connecting ring 804 from the mounting ring 801, and then the filter sleeve 802 is cleaned, and the filter cotton 803 is replaced at the same time, so as to maintain the good filtering ability of the filter assembly 8.

[0030] The bottom of the fixing ring 603 and both sides of the mounting ring 801 are provided with sealing gaskets to avoid leakage.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An etching device for producing silicon crystalline solar cells, comprising an etching device body (1), a guide groove (3) arranged on the etching device body (1), and a filter screen (2) arranged on the guide groove (3), characterized in that: A liquid storage tank (5) is provided on one side of the guide groove (3), and a filtering mechanism is provided between the etching equipment body (1) and the liquid storage tank (5), wherein the filtering mechanism comprises: A filter pipe (4), wherein the filter pipe (4) is arranged between the guide groove (3) and the liquid storage tank (5); A connecting assembly (7), wherein both ends of the filtering pipe (4) are provided with a connecting assembly (7), and the connecting assembly (7) is used to assemble the filtering pipe (4); A collecting component (6), the collecting component (6) being arranged at the bottom of the filtering pipe (4), and the collecting component (6) being used to collect impurities; A filter component (8) is arranged inside the connecting component (7), and the filter component (8) is used to filter impurities.

2. The etching equipment for producing silicon crystalline solar cells according to claim 1, characterized in that: The filtering pipe (4) comprises a U-shaped pipe (401) and two connecting pipes (402) arranged at the ends, wherein one end of one connecting pipe (402) is fixedly connected to the side of the liquid storage tank (5), and one end of the other connecting pipe (402) is fixedly connected to one side of the guide groove (3).

3. The etching equipment for producing silicon crystalline solar cells according to claim 1, characterized in that: The collecting assembly (6) comprises a connecting sleeve (601) communicating with the bottom of the filtering pipe (4), a collecting cylinder (604) threadedly connected to the outer surface of the connecting sleeve (601), a conical sleeve (602) fixedly arranged inside the connecting sleeve (601), a fixing ring (603) fixedly connected to one side of the connecting sleeve (601), and a rotating assembly (605) fixedly connected to the bottom end of the collecting cylinder (604).

4. The etching equipment for producing silicon crystalline solar cells according to claim 2, characterized in that: The connection assembly (7) comprises a connection end (701) fixedly connected to the end of the connection pipe (402) and a connection cover (702) sleeved on the end of the U-shaped tube (401), and the outer surface of the connection end (701) is connected to the inner thread of the connection cover (702).

5. The etching equipment for producing silicon crystalline solar cells according to claim 3, characterized in that: The rotating assembly (605) is composed of a fixed round block fixedly connected to the bottom end of the collecting cylinder (604) and a plurality of protrusions fixedly connected to the outside of the fixed round block. The collecting assembly (6) is arranged at the bottom of the filtering pipe (4).

6. The etching equipment for producing silicon crystalline solar cells according to claim 4, characterized in that: The filter assembly (8) is arranged inside one of the connection assemblies (7), and the filter assembly (8) comprises a mounting ring (801) arranged at the end of the connection cover (702), a filter sleeve (802) fixedly connected to the bottom of the mounting ring (801), filter cotton (803) arranged inside the filter sleeve (802), a connection ring (804) threadedly connected to the inside of the mounting ring (801), a handle (806) fixedly connected to the top of the connection ring (804), and a circular grille (805) arranged inside the connection ring (804).

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