Flow uniformizing plate with bubbling pipeline and solar cell cleaning device

Abstract

The utility model discloses a flow uniformizing plate with a bubbling pipeline and a solar cell cleaning device, relates to the technical field of solar cells, and aims to solve the problem that the quality of a cleaned heterojunction cell is unqualified due to the fact that a nitrogen bubbling pipeline is arranged at the bottom of a tank body and located below the flow uniformizing plate and affects the cleaning effect on the heterojunction cell. The flow uniformizing plate with the bubbling pipeline comprises a flow uniformizing plate body and the bubbling pipeline. A first through hole is formed in at least one face of the flow uniformizing plate, a containing channel is formed in the flow uniformizing plate, and the first through hole communicates with the containing channel. Flow uniformizing holes are formed in the flow uniformizing plate, and the flow uniformizing holes penetrate through the flow uniformizing plate in the thickness direction of the flow uniformizing plate. At least part of the bubbling pipeline is located in the containing channel, a second through hole is formed in the bubbling pipeline, the first through hole is communicated with the second through hole, and the bubbling pipeline is provided with an air inlet and an air outlet which are communicated with the outside.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, in particular to a flow-uniform plate with a bubbling pipeline and a solar cell cleaning device. Background Art

[0002] In order to meet the requirements of new batteries, especially heterojunction batteries, for enhanced cleaning effects, more and more tanks are equipped with nitrogen bubbling pipeline devices, which generally include a long, bent nitrogen bubbling pipeline and a gas supply part connected to the nitrogen bubbling pipeline.

[0003] Specifically, in the prior art, a long, bent nitrogen bubbling pipeline is generally installed below a uniform flow plate in the tank body, and bubbles are discharged into the tank body through air holes in the nitrogen bubbling pipeline to accelerate the mixing of the drug solution and make the drug solution uniform.

[0004] However, since the nitrogen bubbling pipeline is arranged at the bottom of the tank and below the flow-uniform plate, the cleaning effect of the heterojunction battery will be affected, resulting in the quality of the heterojunction battery after cleaning being unqualified. Utility Model Content

[0005] The utility model aims to provide a flow equalizer with a bubbling pipeline and a solar cell cleaning device, which are used to improve the cleaning effect of solar cells and reduce or eliminate the probability of unqualified quality of solar cells after cleaning.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a flow equalizer plate with a bubbling pipeline. The flow equalizer plate with a bubbling pipeline comprises: a flow equalizer plate and a bubbling pipeline. A first through hole is provided on at least one side of the flow equalizer plate, and a receiving channel is provided inside the flow equalizer plate, and the first through hole is connected to the receiving channel. A flow equalizer hole is provided on the flow equalizer plate, and the flow equalizer hole penetrates the flow equalizer plate along the thickness direction of the flow equalizer plate. At least part of the area of ​​the bubbling pipeline is located in the receiving channel, a second through hole is provided on the bubbling pipeline, and the first through hole is connected to the second through hole, and the bubbling pipeline has an air inlet and an air outlet connected to the outside.

[0007] Compared with the prior art, in the flow plate with bubbling pipeline provided by the utility model, since at least part of the area of ​​the bubbling pipeline is located in the accommodating channel, the first through hole is connected to the second through hole. At this time, the bubbling pipeline can discharge bubbles through the second through hole and the first through hole. Exemplary, in actual use, when the flow plate is located inside the tank body, and the second through hole is toward the top of the tank body, after the tank body is filled with liquid medicine, the bubbles discharged by the bubbling pipeline are not only located above the flow plate, but also the bubbles can be located below the flow plate through the flow hole. At this time, the bubbles discharged by the bubbling pipeline are mixed in the liquid medicine located above the flow plate and below the flow plate. Compared with the prior art in which the nitrogen bubbling pipeline is arranged below the flow plate, the bubbles are distributed more widely. Based on this, not only can the liquid medicine in the tank body be mixed more evenly, but also the speed of liquid medicine mixing can be accelerated to reduce or avoid the occurrence of uneven velvet, whitening, and liquid medicine remaining on the solar cell. Furthermore, by utilizing the impact force of the more evenly distributed bubbles when they burst, the particles attached to the surface of the solar cell can be accelerated to fall off, so as to improve the cleaning effect of the solar cell and reduce or eliminate the probability of the solar cell being of unqualified quality after cleaning. In addition, since at least part of the bubbling pipeline is located in the accommodating channel, compared with the prior art, the bubbling pipeline in the utility model is not only better fixed and less prone to deformation, but also the position of the bubbling pipeline is not easily changed, and the factors affecting the uneven bubbling are reduced. Moreover, the space at the bottom of the tank body can be saved, and the utilization rate of the tank body can be improved.

[0008] In one implementation, the length of the bubbling pipeline is equal to the length of the flow plate, and the length direction of the bubbling pipeline is consistent with the length direction of the flow plate.

[0009] When the above technical solution is adopted, the length of the bubbling pipeline in the utility model is reduced compared with the length of the nitrogen bubbling pipeline in the prior art. At this time, the problem of the large difference in bubbling effect at the air inlet and the air outlet due to the excessive length of the bubbling pipeline can be solved, and the bubbling generated at various places in the bubbling pipeline can be made more uniform. Based on this, the uniformity of the velvet surface of the solar cell after cleaning can be further improved, and the yield of the solar cell can be improved, thereby further improving the cleaning effect of the solar cell and reducing or eliminating the probability of unqualified quality of the solar cell after cleaning.

[0010] In one implementation, the bubbling pipeline is completely located in the receiving channel. In this case, the space occupied by the bubbling pipeline can be further reduced, the space at the bottom of the tank body can be saved, and the utilization rate of the tank body can be improved. Furthermore, the problem that the baffles on both sides of the bubbling flower basket are close to the edge of the tank body in the prior art, and the edge position is the base position, and the bubbling effect has little effect on the solar cell at the edge position.

[0011] In one implementation, the flow plate has a central region and two edge regions, and along the width direction of the flow plate, the two edge regions are respectively located on both sides of the central region.

[0012] A bubbling pipeline is respectively arranged in the two edge areas of the flow-equalizing plate. At this time, the bubbles generated by the above two bubbling pipelines can meet the actual needs and ensure the cleaning effect. Further, at least two bubbling pipelines are arranged in the central area of ​​the flow-equalizing plate. At this time, the bubbling amount can be increased to further improve the cleaning effect of the solar cell. Further, it can be seen from the above that a plurality of independent bubbling pipelines are arranged in the flow-equalizing plate, and each bubbling pipeline has an air inlet and an air outlet. At this time, the plurality of bubbling pipelines do not affect each other. Based on this, it is possible to avoid the situation where all bubbling pipelines cannot work normally due to a problem in a bubbling pipeline, and ensure that the flow-equalizing plate with a bubbling pipeline works normally. In summary, the cleaning effect of the solar cell can be further improved, and the probability of the quality of the solar cell being unqualified after cleaning can be reduced or eliminated.

[0013] In one implementation, the diameter of the bubbling pipeline is D1, wherein 0.5 cm ≤ D1 ≤ 1.5 cm.

[0014] In the case of adopting the above technical solution, since the diameter of the bubbling pipeline is greater than or equal to 0.5 cm, it is possible to avoid too small a gas flow rate due to the small diameter of the bubbling pipeline, so as to ensure actual work needs. Furthermore, since the diameter of the bubbling pipeline is less than or equal to 1.5 cm, it is possible to avoid too large a gas flow rate, reduce gas consumption, and reduce cleaning costs while meeting actual work needs.

[0015] In one implementation, along the length direction of the bubbling pipeline, a plurality of second through holes are opened on the same side wall of the bubbling pipeline, and the opening directions of all the second through holes are the same.

[0016] When the above technical solution is adopted, the above second through hole is a single-sided opening, which can avoid a large pressure change from the air inlet to the air outlet of the bubbling pipeline, thereby reducing or eliminating the difference in bubbling effect at the air inlet and the air outlet, and making the bubbles generated at various locations of the bubbling pipeline more uniform. Based on this, the cleaning effect of the solar cell can be further improved, and the probability of unqualified quality of the solar cell after cleaning can be reduced or eliminated.

[0017] In one implementation, the opening direction of the first through hole, the opening direction of the second through hole, and the opening direction of the flow-uniform hole are all the same.

[0018] In the case of adopting the above technical solution, in actual use, the liquid medicine in the tank body will pass through the uniform flow hole, and when the opening directions of the first through hole, the second through hole and the uniform flow hole are the same, the bubbles discharged from the bubbling pipeline will mix with the liquid medicine while the liquid medicine passes through the uniform flow hole. At this time, the efficiency of liquid medicine mixing can be improved.

[0019] In one implementation, the diameter of the bubbling pipeline is greater than or equal to the diameter of the second through hole, and the diameter of the first through hole is equal to the diameter of the second through hole.

[0020] In one implementation, a diameter of the second through hole is D2, wherein 0.2 mm ≤ D2 ≤ 0.5 mm.

[0021] In the case of adopting the above technical solution, since the diameter of the second through hole is greater than or equal to 0.2 mm, it can be avoided that the bubbling effect is basically absent or absent due to the small diameter of the second through hole, and the gas flow through the second through hole is very small, thereby avoiding the poor cleaning effect of the solar cell to ensure the uniformity of the velvet surface of the solar cell after cleaning. Further, since the diameter of the second through hole is less than or equal to 0.5 mm, the bubbling effect is uniform at this time, the cleaning effect of the solar cell is good, and the uniformity of the velvet surface of the solar cell after cleaning is good. Further, it can be avoided that when the diameter of the second through hole is greater than 0.5 mm, the bubbling effect becomes worse, the bubbles become larger, the bubbles are uneven, and even the bubbles basically disappear or disappear, the gas flow is too large, and the liquid level fluctuation increases, so as to avoid the poor cleaning effect of the solar cell and the problem of poor uniformity of the velvet surface of the solar cell after cleaning.

[0022] In one implementation, a plurality of flow equalizing holes are provided on the flow equalizing plate, and the plurality of flow equalizing holes are distributed on the flow equalizing plate in a matrix.

[0023] In the actual cleaning process, the liquid medicine is pumped into the tank body through the circulation pump. Since the circulation pump has a large power, the impact force on the liquid medicine is very large. When the liquid medicine passes through the flow plate, the shielding effect of the flow plate and the diversion effect of the flow hole reduce the fluctuation of the liquid medicine and make the liquid level stable. At this time, the impact of the liquid medicine on the solar cell can be reduced, reducing the probability of damage to the surface of the solar cell.

[0024] In one implementation, along the length direction of the bubbling pipeline, the spacing between any two adjacent second through holes on the same bubbling pipeline is equal.

[0025] When the above technical solution is adopted, the uniformity of the diffusion and mixing of the chemical solution can be improved, and the undesirable conditions such as uneven velvet surface, whitening, and chemical solution residue on the solar cell can be further reduced or avoided.

[0026] In one implementation, along the length direction of the bubbling pipeline, the distance between two adjacent second through holes is X, wherein 1.5 cm ≤ X ≤ 2 cm.

[0027] When the above technical solution is adopted, the uniformity of the diffusion and mixing of the chemical solution can be improved, and the undesirable conditions such as uneven velvet surface, whitening, and chemical solution residue on the solar cell can be further reduced or avoided.

[0028] In a second aspect, the utility model further provides a solar cell cleaning device, which comprises a tank body and a flow-distributing plate with a bubbling pipeline as described in the above technical solution, wherein the flow-distributing plate with a bubbling pipeline is arranged in the tank body.

[0029] Compared with the prior art, since at least part of the area of ​​the bubbling pipeline is located in the accommodating channel, the first through hole is connected to the second through hole. At this time, the bubbling pipeline can discharge bubbles through the second through hole and the first through hole. Exemplary, in actual use, when the flow plate is located inside the tank body, and the second through hole is toward the top of the tank body, after the tank body is filled with liquid medicine, the bubbles discharged by the bubbling pipeline are not only located above the flow plate, but also the bubbles can be located below the flow plate through the flow hole. At this time, the bubbles discharged by the bubbling pipeline are mixed in the liquid medicine located above the flow plate and below the flow plate. Compared with the prior art, the nitrogen bubbling pipeline is arranged below the flow plate, and the bubbles are distributed more widely. Based on this, not only can the liquid medicine in the tank body be mixed more evenly, but also the speed of liquid medicine mixing can be accelerated to reduce or avoid the occurrence of uneven velvet, whitening, and liquid medicine remaining on the solar cell. Furthermore, by utilizing the impact force of the more evenly distributed bubbles when they burst, the particles attached to the surface of the solar cell can be accelerated to fall off, so as to improve the cleaning effect of the solar cell and reduce or eliminate the probability of the solar cell being of unqualified quality after cleaning. In addition, since at least part of the bubbling pipeline is located in the accommodating channel, compared with the prior art, the bubbling pipeline in the utility model is not only better fixed and less prone to deformation, but also the position of the bubbling pipeline is not easily changed, and the factors affecting the uneven bubbling are reduced. Moreover, the space at the bottom of the tank body can be saved, and the utilization rate of the tank body can be improved.

[0030] In one implementation, the solar cell cleaning device further includes: a first flow regulating valve, disposed at the air inlet of the bubbling pipeline; and / or a second flow regulating valve, disposed at the air outlet of the bubbling pipeline.

[0031] When the above technical solution is adopted, the first flow regulating valve and / or the second flow regulating valve can be used to better control the flow rate of the gas, thereby reducing the gas consumption while making the bubbling uniform, thereby reducing the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0033] Figure 1 It is a front view of the flow equalizer in the embodiment of the utility model;

[0034] Figure 2 A cross-sectional view of a flow equalizer in an embodiment of the utility model;

[0035] Figure 3 It is a cross-sectional view of a flow-distributing plate with a bubbling pipeline in an embodiment of the utility model;

[0036] Figure 4 In the embodiment of the utility model Figure 3 zoning map;

[0037] Figure 5 It is a side view of a flow-uniform plate with a bubbling pipeline in an embodiment of the present utility model.

[0038] Reference numerals:

[0039] 1-flow plate, 10-flow hole, 11-center area,

[0040] 12-edge area, 13-first through hole, 14-accommodating channel,

[0041] 2-bubbling pipeline, 20-second through hole, 21-air inlet,

[0042] 22-air outlet, 3-first flow regulating valve, 4-second flow regulating valve. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0046] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0047] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] In order to solve the above technical problems, in the first aspect, the embodiment of the utility model provides a flow plate with a bubbling pipeline. Figures 1 to 3 The flow-distributing plate with a bubbling pipeline comprises: a flow-distributing plate 1 and a bubbling pipeline 2.

[0049] See also Figure 1 and Figure 2 A first through hole 13 is provided on at least one side of the flow equalizer plate 1, and a receiving channel 14 is provided inside the flow equalizer plate 1. The first through hole 13 is connected to the receiving channel 14. A flow equalizer hole 10 is provided on the flow equalizer plate 1, and the flow equalizer hole 10 penetrates the flow equalizer plate 1 along the thickness direction of the flow equalizer plate 1.

[0050] Exemplarily, the number of the first through holes and the flow-uniform holes may be one, two, three or more, which is not specifically limited here, as long as the actual needs can be met.

[0051] Furthermore, the distribution shape of an accommodating channel may be serpentine, straight, or U-shaped, etc. Furthermore, the length direction of the accommodating channel may be consistent with the length direction L1 of the flow equalizer 1, or may be consistent with the width direction W of the flow equalizer 1. Further, the number of accommodating channels opened inside the flow equalizer 1 may be one or more.

[0052] For example, the distribution shape of the accommodating channels 14 is a straight line, and the length direction L3 of the accommodating channels 14 is consistent with the length direction L1 of the flow equalizer 1. In addition, along the width direction W of the flow equalizer 1, a plurality of accommodating channels 14 are distributed at intervals. At this time, the plurality of first through holes 13 are divided into a plurality of groups, and each group corresponds to a accommodating channel 14.

[0053] Furthermore, the flow-uniform holes 10 are spaced apart from the first through holes 13 and the accommodating channels 14 .

[0054] In the embodiment of the utility model, the above-mentioned uniform flow plate is provided with a plurality of uniform flow holes, and the distribution of the plurality of uniform flow holes is various, for example, triangular distribution, U-shaped distribution, matrix distribution, etc. As a possible implementation method, see Figure 1 The above-mentioned multiple flow holes 10 are distributed in a matrix on the flow plate 1. In the actual cleaning process, the liquid medicine is pumped into the tank body through the circulation pump. Since the power of the circulation pump is very large, the impact force on the liquid medicine is very large. When the liquid medicine passes through the flow plate 1, the shielding effect of the flow plate 1 and the guiding effect of the flow holes 10 reduce the fluctuation of the liquid medicine and make the liquid level stable. At this time, the impact of the liquid medicine on the solar cell can be reduced, and the probability of damage to the surface of the solar cell can be reduced.

[0055] As a possible implementation, see Figures 1 to 3 At least part of the bubbling pipeline 2 is located in the accommodating channel 14, a second through hole 20 is opened on the bubbling pipeline 2, the first through hole 13 is connected to the second through hole 20, and the bubbling pipeline 2 has an air inlet 21 and an air outlet 22 connected to the outside.

[0056] Exemplarily, the distribution shape of the above-mentioned bubbling pipeline can be serpentine, straight, or U-shaped, etc. For example, when the distribution shape of the bubbling pipeline 2 is straight, along the length direction L2 of the bubbling pipeline 2, the air inlet 21 and the air outlet 22 of the bubbling pipeline 2 are relatively distributed. Further, each first through hole can be connected to each second through hole, and some of the first through holes can be connected to some of the second through holes. The specific correspondence between the first through hole and the second through hole can be set according to actual needs, and no specific limitation is made here. Further, the number of the above-mentioned second through holes can be one, two, three or more, and no specific limitation is made here, as long as it can meet the actual needs.

[0057] See also Figures 1 to 3In the flow-distributing plate with a bubbling line provided by the embodiment of the utility model, since at least part of the area of ​​the bubbling line 2 is located in the accommodating channel, the first through hole is connected to the second through hole 20. At this time, the bubbling line 2 can discharge bubbles through the second through hole 20 and the first through hole. Exemplarily, in actual use, when the flow-distributing plate 1 is located inside the tank body and the second through hole is facing the top of the tank body, after the liquid medicine is poured into the tank body, the bubbles discharged by the bubbling line 2 are not only located above the flow-distributing plate, but also the bubbles can be located below the flow-distributing plate through the flow-distributing hole. At this time, the bubbles discharged by the bubbling line are mixed in the liquid medicine located above the flow-distributing plate 1 and below the flow-distributing plate 1. Compared with the prior art in which the nitrogen bubbling line 2 is arranged below the flow-distributing plate 1, the bubbles are distributed more widely. Based on this, not only can the liquid medicine in the tank body be mixed more evenly, but also the speed of liquid medicine mixing can be accelerated to reduce or avoid the occurrence of uneven velvet, whitening, and liquid medicine remaining on the solar cell. Furthermore, by utilizing the impact force of the more evenly distributed bubbles when they burst, the particles attached to the surface of the solar cell can be accelerated to fall off, so as to improve the cleaning effect of the solar cell and reduce or eliminate the probability of the solar cell being of unqualified quality after cleaning. In addition, since at least part of the area of ​​the bubbling pipeline 2 is located in the accommodating channel, compared with the prior art, the bubbling pipeline 2 in the embodiment of the utility model is not only better fixed and less prone to deformation, but also the position of the bubbling pipeline 2 is not easily changed, and the factors affecting the uneven bubbling are reduced. Moreover, the space at the bottom of the tank body can be saved, and the utilization rate of the tank body can be improved.

[0058] As a possible implementation, see Figure 3 The length L2 of the bubbling pipeline 2 is equal to or slightly longer than the length of the flow-uniform plate 1 , and the length direction L2 of the bubbling pipeline 2 is consistent with the length direction L1 of the flow-uniform plate 1 .

[0059] In the case of adopting the above technical solution, the length of the bubbling line 2 in the embodiment of the utility model is reduced compared with the length of the nitrogen bubbling line 2 in the prior art. At this time, the problem that the bubbling effect at the air inlet 21 and the air outlet 22 is very different due to the bubbling line 2 being too long can be solved, and the bubbling generated at various places of the bubbling line 2 can be made more uniform. Based on this, the uniformity of the velvet surface of the solar cell after cleaning can be further improved, and the yield of the solar cell can be improved, thereby further improving the cleaning effect of the solar cell, and reducing or eliminating the probability of unqualified quality of the solar cell after cleaning. It should be understood that at this time, the bubbling line can be completely located in the accommodating channel, or it can be partially located in the accommodating channel.

[0060] As a possible implementation method, the bubbling line is completely located in the accommodating channel. At this time, the space occupied by the bubbling line can be further reduced, the space at the bottom of the tank body can be saved, and the utilization rate of the tank body can be improved. Furthermore, it can also solve the problem in the prior art that the baffles on both sides of the bubbling flower basket are close to the edge of the tank body, the edge position is the base position, and the bubbling effect has a small effect on the solar cell at the edge position. It should be understood that at this time, the length L2 of the bubbling line 2 can be less than the length of the flow plate 1, or it can be equal to the length of the flow plate 1. Even, the length L2 of the bubbling line 2 can be greater than the length of the flow plate 1, and at this time the bubbling line 2 is folded and arranged in the accommodating channel of the flow plate 1.

[0061] As a possible implementation, see Figure 3 and Figure 4 The flow plate 1 has a central area 11 and two edge areas 12 . Along the width direction W of the flow plate 1 , the two edge areas 12 are respectively located on both sides of the central area 11 .

[0062] A bubbling line 2 is provided in each of the two edge areas 12 of the flow-distributing plate 1. At this time, the bubbles generated by the two bubbling lines 2 can meet the actual needs and ensure the cleaning effect. Further, at least two bubbling lines 2 are provided in the central area 11 of the flow-distributing plate 1. At this time, the bubbling amount can be increased to further improve the cleaning effect of the solar cell. Further, along the width direction W of the flow-distributing plate 1, all bubbling lines 2 are evenly spaced. At this time, the bubbles generated by the bubbling line 2 can be made more uniform to further improve the uniformity of the velvet surface of the solar cell after cleaning, and to improve the yield of the solar cell. Moreover, it can be seen from the above that a plurality of independent bubbling lines 2 are provided in the flow-distributing plate 1, and each bubbling line 2 has an air inlet 21 and an air outlet 22. At this time, the plurality of bubbling lines 2 do not affect each other. Based on this, it is possible to avoid the situation where all bubbling lines 2 cannot work properly due to a problem in one bubbling line 2, and ensure that the flow-distributing plate with the bubbling line works normally.

[0063] In summary, the above technical solution can further improve the cleaning effect of solar cells and reduce or eliminate the probability of unqualified quality of solar cells after cleaning.

[0064] Exemplarily, four bubbling lines 2, five bubbling lines 2, or six bubbling lines 2, etc., may be arranged inside the flow equalizer 1. At this time, a corresponding number of accommodating channels are provided inside the flow equalizer 1. Furthermore, the length of each of the bubbling lines 2 is equal to the length of the flow equalizer 1, and each of the bubbling lines 2 is completely located in the accommodating channel. Furthermore, along the length direction of the bubbling line 2, the air inlet 21 and the air outlet 22 of the bubbling line 2 are relatively distributed.

[0065] As a possible implementation, see Figure 5 The diameter of the bubbling pipeline 2 is D1, wherein 0.5 cm ≤ D1 ≤ 1.5 cm. For example, the diameter D1 of the bubbling pipeline 2 can be 0.5 cm, 0.8 cm, 0.95 cm, 1 cm, 1.2 cm or 1.5 cm.

[0066] In the case of adopting the above technical solution, since the diameter of the bubbling pipeline 2 is greater than or equal to 0.5 cm, it is possible to avoid too small a gas flow rate due to too small a diameter of the bubbling pipeline 2, so as to ensure actual work needs. Further, since the diameter of the bubbling pipeline 2 is less than or equal to 1.5 cm, it is possible to avoid too large a gas flow rate, reduce gas consumption, and reduce cleaning costs while meeting actual work needs.

[0067] As a possible implementation, see Figure 3 Along the length direction L2 of the bubbling pipeline 2, a plurality of second through holes 20 are opened on the same side wall of the bubbling pipeline 2, and the opening directions of all the second through holes 20 are the same.

[0068] When the above technical solution is adopted, the second through hole 20 is a single-sided opening, which can avoid a large pressure change from the air inlet 21 to the air outlet 22 of the bubbling pipeline 2, thereby reducing or eliminating the difference in bubbling effect at the air inlet 21 and the air outlet 22, and making the bubbles generated at various locations of the bubbling pipeline 2 more uniform. Based on this, the cleaning effect of the solar cell can be further improved, and the probability of unqualified quality of the solar cell after cleaning can be reduced or eliminated.

[0069] As a possible implementation, see Figure 3 , the opening direction of the first through hole, the opening direction of the second through hole 20 and the opening direction of the flow-uniform hole 10 are all the same.

[0070] In the case of adopting the above technical solution, in actual use, the liquid medicine in the tank body will pass through the uniform flow hole 10. When the opening directions of the first through hole, the second through hole 20 and the uniform flow hole 10 are the same, the bubbles discharged from the bubbling pipeline 2 will mix with the liquid medicine while the liquid medicine passes through the uniform flow hole 10. At this time, the efficiency of liquid medicine mixing can be improved.

[0071] As a possible implementation, see Figure 3 The diameter of the bubbling pipeline 2 is greater than or equal to the diameter of the second through hole 20 , and the diameter of the first through hole is equal to the diameter of the second through hole 20 .

[0072] As a possible implementation, the diameter of the second through hole is D2, wherein 0.2 mm ≤ D2 ≤ 0.5 mm. For example, the diameter D2 of the second through hole is 0.2 mm, 0.28 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.48 mm or 0.5 mm, etc. Preferably, the diameter of the second through hole is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

[0073] When the above technical solution is adopted, since the diameter of the second through hole is greater than or equal to 0.2 mm, it is possible to avoid the situation where there is basically no or no bubbling effect due to the second through hole being too small in diameter, and the gas flow through the second through hole is very small, thereby avoiding poor cleaning effect of the solar cell and ensuring the uniformity of the velvet surface of the solar cell after cleaning.

[0074] Furthermore, since the diameter of the second through hole is less than or equal to 0.5 mm, the bubbling effect is uniform, the cleaning effect of the solar cell is good, and the uniformity of the velvet surface of the solar cell after cleaning is good.

[0075] Furthermore, it can avoid the occurrence of situations such as the bubbling effect becoming worse, the bubbles becoming larger, the bubbles becoming uneven, or even the bubbles basically disappearing or disappearing, the gas flow being too large, and the liquid level fluctuation increasing when the diameter of the second through hole is greater than 0.5 mm, thereby avoiding the poor cleaning effect of the solar cell and the deterioration of the uniformity of the velvet surface of the solar cell after cleaning.

[0076] Table 1 Schematic diagram of the relationship between the diameter of the second through hole and the defective ratio, gas consumption and velvet uniformity of the solar cell after cleaning

[0077]

[0078] Table 1 shows a schematic diagram of the relationship between the diameter of the second through hole and the defective ratio of the solar cell after cleaning, the uniformity of the velvet surface, and the gas consumption.

[0079] From Table 1, we can see that:

[0080] When the diameter of the second through hole is 0.1 mm, since the diameter of the second through hole is too small, there is basically no bubbling effect, and the cleaning effect on the solar cell is not good (the defective ratio is high, at 5.00%), and the uniformity of the velvet surface of the solar cell after cleaning is poor.

[0081] When the diameter of the second through hole is 0.2 mm, the defective ratio of the solar cell after cleaning is reduced to 0.52%, and the texture uniformity of the solar cell after cleaning is 3.594.

[0082] When the diameter of the second through hole is greater than or equal to 0.3 mm and less than or equal to 0.5 mm, the bubbling effect is uniform, the cleaning effect of the solar cell is good, and the uniformity of the velvet surface of the solar cell after cleaning is good.

[0083] When the diameter of the second through hole is greater than or equal to 0.6 mm and less than or equal to 0.9 mm, the bubbling effect deteriorates, the bubbles become larger, the bubbles are uneven, the defective proportion of solar cells after cleaning tends to increase, the gas flow rate continues to increase, and the uniformity of the velvet surface of the solar cell after cleaning deteriorates.

[0084] When the diameter of the second through hole is 1 mm, the bubbling basically disappears, presenting the effect of boiling water, the gas flow further increases, the liquid level fluctuation increases, the defective proportion of solar cells after cleaning is large, and the uniformity of the velvet surface of the solar cell after cleaning is poor.

[0085] It should be understood that the gas consumption in Table 1 reflects the gas flow rate.

[0086] The number of the first through hole and the second through hole can be set according to the actual size of the slot body. As a possible implementation method, see Figure 3 In the same bubbling pipeline 2 , every two adjacent second through holes 20 correspond to one flow-uniforming hole 10 , and the area between two adjacent flow-uniforming holes 10 corresponds to one second through hole 20 .

[0087] Exemplarily, when eight flow-uniform holes 10 are provided on the flow-uniform plate 1 , 23 second through holes 20 are provided on the bubbling pipe.

[0088] As a possible implementation, see Figure 3 , along the length direction L2 of the bubbling pipe 2, the spacing between any two adjacent second through holes 20 on the same bubbling pipe 2 is equal. At this time, the uniformity of the diffusion and mixing of the liquid medicine can be improved, and the undesirable conditions such as uneven velvet, whitening, and liquid medicine residue on the solar cell can be further reduced or avoided.

[0089] As a possible implementation, along the length direction of the bubbling pipeline, the spacing between two adjacent second through holes is X, wherein 1.5 cm ≤ X ≤ 2 cm. For example, the spacing X may be 1.5 cm, 1.65 cm, 1.7 cm, 1.8 cm, 1.9 cm or 2 cm, etc. At this time, the uniformity of the diffusion and mixing of the liquid medicine can be improved, and the undesirable conditions such as uneven velvet, whitening, and liquid medicine remaining on the solar cell can be further reduced or avoided.

[0090] Table 2 is the velvet surface data of the bubbling pipeline provided by the utility model and the bubbling pipeline in the prior art after cleaning the solar cell.

[0091]

[0092]

[0093] It can be seen from Table 2 that after the solar cell is cleaned by the bubbling pipeline in the prior art, the uniformity of the velvet surface of the solar cell after cleaning is poor, the maximum value of "size" is 3.8384um, the minimum value is 3.4242um, and the range is 0.44627um.

[0094] After the solar cell is cleaned by the bubbling pipeline provided in the embodiment of the utility model, the uniformity of the velvet surface of the solar cell after cleaning is good, the maximum value of "size" is 3.4881um, the minimum value is 3.45874um, and the range is 0.02936um.

[0095] It can be seen that the suede data displayed in the bubbling pipeline provided by the embodiment of the utility model is superior to the suede data displayed in the bubbling pipeline in the prior art.

[0096] Table 3 Comparison of data after cleaning solar cells using the bubbling pipeline provided by the utility model and the bubbling pipeline in the prior art

[0097]

[0098] As shown in Table 3, 7250 solar cells were cleaned by the bubbling pipeline in the prior art. Among them, 8 had liquid residue, 11 had small white stains, 67 had flower basket tooth marks, and the defective ratio was 1.19%.

[0099] 5600 solar cells were cleaned and tested by the bubbling pipeline provided by the embodiment of the utility model, among which 0 pieces had liquid residue, 1 piece had small white stains, 0 pieces had flower basket tooth marks, and the defective ratio was 0.02%. The extreme difference of the defective ratio between the two was 1.17%.

[0100] It can be seen that the bubbling pipeline provided by the embodiment of the utility model is used to clean solar cells, and the cleaning effect of solar cells is significantly improved compared with the bubbling pipeline in the prior art. The flower basket tooth marks are significantly improved, and the situation where the liquid remains on the solar cell does not occur, and the range is reduced. It should be understood that the range is used to indicate the uniformity of data. The smaller the range, the better the uniformity.

[0101] In a second aspect, the embodiment of the utility model further provides a solar cell cleaning device, which comprises a tank body and a flow-distributing plate with a bubbling pipeline as described in the above technical solution, wherein the flow-distributing plate with a bubbling pipeline is arranged in the tank body.

[0102] Since at least part of the area of ​​the bubbling pipeline is located in the accommodating channel, the first through hole is connected to the second through hole. At this time, the bubbling pipeline can discharge bubbles through the second through hole and the first through hole. Exemplary, in actual use, when the flow plate is located inside the tank body, and the second through hole is toward the top of the tank body, after the tank body is filled with liquid medicine, the bubbles discharged by the bubbling pipeline are not only located above the flow plate, but also the bubbles can be located below the flow plate through the flow hole. At this time, the bubbles discharged by the bubbling pipeline are mixed in the liquid medicine located above the flow plate and below the flow plate. Compared with the prior art, the nitrogen bubbling pipeline is arranged below the flow plate, and the bubbles are distributed more widely. Based on this, not only can the liquid medicine in the tank body be mixed more evenly, but also the speed of liquid medicine mixing can be accelerated to reduce or avoid the occurrence of uneven velvet, whitening, and liquid medicine remaining on the solar cell. Furthermore, by utilizing the impact force of the more evenly distributed bubbles when they burst, the particles attached to the surface of the solar cell can be accelerated to fall off, so as to improve the cleaning effect of the solar cell and reduce or eliminate the probability of the solar cell being of unqualified quality after cleaning. In addition, since at least part of the bubbling pipeline is located in the accommodating channel, compared with the prior art, the bubbling pipeline in the utility model is not only better fixed and less prone to deformation, but also the position of the bubbling pipeline is not easily changed, and the factors affecting the uneven bubbling are reduced. Moreover, the space at the bottom of the tank body can be saved, and the utilization rate of the tank body can be improved.

[0103] In actual use, the flow-uniform plate with the bubbling pipeline is transversely arranged in the tank body, and the flow-uniform hole is opposite to the bottom of the tank body.

[0104] As a possible implementation, see Figure 3 The solar cell cleaning device further comprises: a first flow regulating valve 3, arranged at the air inlet 21 of the bubbling pipeline; and / or a second flow regulating valve 4, arranged at the air outlet 22 of the bubbling pipeline.

[0105] By using the first flow regulating valve 3 and / or the second flow regulating valve 4, the flow rate of the gas can be better controlled, and the gas consumption can be reduced while making the bubbling uniform, so as to reduce the processing cost.

[0106] In the embodiment of the utility model, the air inlet 21 of each bubbling pipeline is provided with a first flow regulating valve 3, and the air outlet 22 of each bubbling pipeline is provided with a second flow regulating valve 4.

[0107] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0108] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A flow plate with a bubbling pipeline, characterized in that: include: A flow equalizer plate, wherein a first through hole is provided on at least one side of the flow equalizer plate; a receiving channel is provided inside the flow equalizer plate, and the first through hole is connected to the receiving channel; a flow equalizer hole is provided on the flow equalizer plate, and the flow equalizer hole penetrates the flow equalizer plate along the thickness direction of the flow equalizer plate; A bubbling pipeline, at least part of which is located in the accommodating channel; a second through hole is provided on the bubbling pipeline, the first through hole is connected to the second through hole; the bubbling pipeline has an air inlet and an air outlet connected to the outside.

2. The flow-distributing plate with a bubbling pipeline according to claim 1, characterized in that: The length of the bubbling pipeline is equal to the length of the flow-distributing plate, and the length direction of the bubbling pipeline is consistent with the length direction of the flow-distributing plate; the bubbling pipeline is completely located in the accommodating channel.

3. The flow-distributing plate with a bubbling pipeline according to claim 1 or 2, characterized in that: The flow plate has a central area and two edge areas; along the width direction of the flow plate, the two edge areas are respectively located on both sides of the central area; One bubbling pipeline is respectively arranged in the two edge regions of the flow-uniform plate, and at least two bubbling pipelines are arranged in the central region of the flow-uniform plate.

4. The flow-distributing plate with a bubbling pipeline according to claim 1, characterized in that: The diameter of the bubbling pipeline is D1, wherein 0.5 cm ≤ D1 ≤ 1.5 cm.

5. The flow-distributing plate with a bubbling pipeline according to claim 1, characterized in that: Along the length direction of the bubbling pipeline, a plurality of second through holes are opened on the same side wall of the bubbling pipeline, and the opening directions of all the second through holes are the same; and / or, The opening direction of the first through hole, the opening direction of the second through hole and the opening direction of the flow-uniform hole are all the same.

6. The flow-distributing plate with a bubbling pipeline according to claim 1, 2, 4 or 5, characterized in that: The diameter of the bubbling pipeline is greater than or equal to the diameter of the second through hole; the diameter of the first through hole is equal to the diameter of the second through hole; and / or, The diameter of the second through hole is D2, wherein 0.2 mm≤D2≤0.5 mm.

7. The flow-distributing plate with a bubbling pipeline according to claim 1, 2, 4 or 5, characterized in that: The flow equalizer plate is provided with a plurality of flow equalizer holes, and the plurality of flow equalizer holes are distributed in a matrix on the flow equalizer plate; and / or, Along the length direction of the bubbling pipeline, the spacing between any two adjacent second through holes on the same bubbling pipeline is equal.

8. The flow-distributing plate with a bubbling pipeline according to claim 1, 2, 4 or 5, characterized in that: Along the length direction of the bubbling pipeline, the distance between two adjacent second through holes is X, wherein 1.5 cm ≤ X ≤ 2 cm.

9. A solar cell cleaning device, characterized in that: It comprises a tank body and a flow-distributing plate with a bubbling pipeline as claimed in any one of claims 1 to 8; The flow-distributing plate with the bubbling pipeline is arranged in the tank body.

10. The solar cell cleaning device according to claim 9, characterized in that: The solar cell cleaning device also includes: a first flow regulating valve, arranged at the air inlet of the bubbling pipeline; and / or, The second flow regulating valve is arranged at the gas outlet of the bubbling pipeline.

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