Liquid mixer
By employing an upper and lower circulation tank structure and a wall filter in the liquid mixer, the problems of low liquid mixing efficiency and frequent equipment maintenance in the prior art are solved, achieving efficient liquid mixing and automated control, and improving production efficiency and equipment reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-03-27
AI Technical Summary
The single-layer tank structure of existing liquid mixers leads to problems such as low liquid mixing efficiency, impurities clogging the filter screen, insufficient circulation flow, frequent equipment maintenance, low production efficiency, and high costs.
The system employs an upper and lower circulation tank structure, with the filter installed on the wall between the upper and lower circulation tanks to extend the liquid circulation path. Automated control is achieved through weighing and concentration sensors to ensure circulation flow and mixing uniformity.
It improves liquid mixing efficiency, reduces equipment downtime and maintenance costs, increases production efficiency and yield, and reduces the risk of equipment damage.
Smart Images
Figure CN224040577U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of solar cell production, in particular, to a liquid mixer. BACKGROUND
[0002] In the production process of solar cells, the texturing process is one of the key links to improve the photoelectric conversion efficiency. The texturing process can form a micro-textured structure (i.e. a textured surface) on the surface of a silicon wafer, which can significantly reduce light reflection and increase light absorption, thereby effectively improving the performance of solar cells. As the core equipment of the texturing process, the liquid mixer is responsible for containing chemical solutions, achieving solution circulation and mixing, and accurately controlling the amount of liquid supplement, and other important functions. Therefore, the design and performance of the liquid mixer directly determine the efficiency, yield and production cost of the texturing process, and it is of great significance to the production of solar cells.
[0003] However, in the prior art, the liquid mixers used in the texturing process mostly adopt a single-layer tank structure. This structure is provided with a filter screen at the bottom of the tank, which is used to filter impurities such as silicon chip fragments in the solution, so as to prevent impurities from entering the circulation system and protect the normal operation of the circulating pump. However, this single-layer tank structure has many disadvantages, for example, the liquid far away from the circulating pump in the tank may have a low circulation efficiency, or even cannot participate in the circulation, thereby causing poor liquid mixing effect. In addition, during the production process, impurities in the liquid will gradually be adsorbed on the filter screen located at the bottom of the tank, and after a period of time, the filter screen may be clogged, resulting in a decrease in circulation flow. This not only affects the liquid mixing effect, but also may cause uneven texturing effect due to insufficient flow, thereby reducing the production yield. After the filter screen is clogged, the circulating pump is easy to suck in various impurities, causing damage to the circulating pump, thereby increasing the maintenance cost of the equipment, and causing equipment downtime, affecting production efficiency. Due to the above-mentioned disadvantages, the single-layer tank structure also needs to be frequently maintained, including cleaning the filter screen, replacing the damaged circulating pump, and calibrating the liquid level meter, etc. On the one hand, it will significantly increase the equipment maintenance cost, and on the other hand, it may also cause production interruption, affecting the overall production efficiency. CONTENT OF THE UTILITY MODEL
[0004] The purpose of the present application is to provide a liquid mixer, which is provided with an upper circulating tank and a lower circulating tank, and a filter is arranged on the wall surface between the upper circulating tank and the lower circulating tank, which helps to improve the efficiency and effect of liquid mixing, and ensures that the liquid mixer has sufficient circulation flow, thereby reducing equipment downtime and reducing equipment maintenance cost, and improving production efficiency.
[0005] The application provides a liquid mixer, which comprises a body, a filter and a circulating pump. The body is used for containing a mixed liquid of a reaction liquid and water, and comprises a lower circulating groove and an upper circulating groove which is nested in the lower circulating groove. At least one side wall of the upper circulating groove and a corresponding side wall of the lower circulating groove are provided with a liquid flow channel. The upper circulating groove is externally connected with a first liquid inlet pipe for injecting the reaction liquid. The filter is arranged on the upper part of the side wall of the upper circulating groove adjacent to the liquid flow channel, and the mixed liquid can pass through the filter from the upper circulating groove into the liquid flow channel. The circulating pump is provided with a suction inlet and a discharge outlet, the suction inlet is connected with the lower circulating groove, and the discharge outlet is connected with the upper circulating groove. The position of the discharge outlet is lower than that of the filter.
[0006] In an implementable scheme, the two opposite side walls of the upper circulating groove are respectively provided with a liquid flow channel relative to the corresponding side walls of the lower circulating groove. The liquid mixer comprises a filter, which is symmetrically arranged on the upper part of the side wall of the upper circulating groove adjacent to the two liquid flow channels.
[0007] In an implementable scheme, the liquid mixer further comprises a liquid supplementing device for supplementing the reaction liquid into the upper circulating groove, and the liquid supplementing device comprises a liquid storage tank and a second liquid inlet pipe. The lower end of the liquid storage tank is connected with the first liquid inlet pipe, and the first liquid inlet pipe is provided with a first liquid inlet valve. The upper end of the liquid storage tank is connected with the second liquid inlet pipe, and the second liquid inlet pipe is provided with a second liquid inlet valve.
[0008] In an implementable scheme, the liquid supplementing device further comprises a weighing sensor, which is connected with the upper surface of the liquid storage tank and is used for measuring the weight of the liquid storage tank in real time.
[0009] In an implementable scheme, the lower circulating groove is externally connected with a discharge pipe for discharging the mixed liquid in the body, and the discharge pipe is provided with a discharge valve.
[0010] In an implementable scheme, the liquid mixer further comprises an overflow pipe, the first end of the overflow pipe is connected with the upper part of the side wall of the upper circulating groove, and the second end is connected with the discharge pipe. The position of the first end of the overflow pipe is higher than that of the filter.
[0011] In an implementable scheme, the lower circulating groove and / or the upper circulating groove is provided with a flow disturbing device.
[0012] In an implementable scheme, the liquid mixer further comprises a controller and a concentration sensor, and the concentration sensor is used for detecting the concentration of the reaction liquid in the mixed liquid in real time. The controller is signal-connected with the weighing sensor, the concentration sensor, the first liquid inlet valve and the second liquid inlet valve, respectively, is used for acquiring the weight signal of the liquid storage tank from the weighing sensor and the concentration signal of the reaction liquid from the concentration sensor, and correspondingly controls the opening or closing of the first liquid inlet valve and the second liquid inlet valve.
[0013] Compared with the prior art, the application has at least the following beneficial effects:
[0014] The liquid mixer provided by the present application prolongs the length of the liquid circulation path in the whole liquid mixer by arranging the upper circulation groove and the lower circulation groove, so that all the liquid can participate in the circulation more fully, which helps to improve the efficiency and effect of liquid mixing. In addition, the liquid mixer of the present application arranges the filter on the wall surface between the upper circulation groove and the lower circulation groove instead of arranging it at the suction inlet of the circulation pump, which effectively avoids the blockage of the suction inlet due to the accumulation of impurities, so as to ensure that the whole liquid mixer has sufficient circulation flow and reduces the possibility of damage to the circulation pump, thus helping to reduce the equipment downtime and reduce the equipment maintenance cost, and improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0016] Figure 1 FIG. 1 is a schematic view of the liquid mixer according to the embodiment of the present application;
[0017] Figure 2 FIG. 2 is a front view of the liquid mixer;
[0018] Figure 3 FIG. 3 is a side view of the liquid mixer;
[0019] Figure 4 FIG. 4 is a schematic view of the liquid mixer provided with a controller.
[0020] In the drawings: 1, body; 2, filter; 3, circulation pump; 4, liquid supplementing device; 5, overflow pipe; 6, controller; 101, lower circulation groove; 102, upper circulation groove; 103, liquid flow channel; 104, concentration sensor; 111, discharge pipe; 112, discharge valve; 301, suction inlet; 302, discharge outlet; 401, liquid storage tank; 402, weighing sensor; 411, first liquid inlet pipe; 412, second liquid inlet pipe; 421, first liquid inlet valve; 422, second liquid inlet valve. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0022] The following detailed description of embodiments of the application in the drawings provided is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application.
[0023] As shown in the drawings, Figures 1-3 The application provides a liquid mixer, which comprises a body 1, a filter 2 and a circulating pump 3. The body 1 is used to contain the mixed liquid of the reaction liquid and water. The body 1 comprises a lower circulating groove 101 and an upper circulating groove 102 which is nested in the lower circulating groove 101. There is a liquid flow passage 103 between at least one side wall of the upper circulating groove 102 and the corresponding side wall of the lower circulating groove 101. The upper circulating groove 102 circumscribes a first liquid inlet pipe 411 for injecting the reaction liquid. The filter 2 is arranged on the upper part of the side wall of the upper circulating groove 102 adjacent to the liquid flow passage 103, and the mixed liquid can pass through the filter 2 from the upper circulating groove 102 into the liquid flow passage 103. The circulating pump 3 is provided with a suction inlet 301 and a discharge outlet 302. The suction inlet 301 is connected with the lower circulating groove 101, and the discharge outlet 302 is connected with the upper circulating groove 102. The position of the discharge outlet 302 is lower than that of the filter 2.
[0024] Specifically, the lower circulating groove 101 and the upper circulating groove 102 can be arranged as a groove structure with an open upper part, so as to simplify the structure of the body 1 and facilitate the inspection and maintenance of the inside of the body 1. As shown in the drawings, Figure 2 The filter 2 can comprise a filter screen and a filter screen pressing plate, and the filter screen is fixed on the side wall of the upper circulating groove 102 by the filter screen pressing plate. The filter 2 can adopt multiple layers of filter screens to enhance the filtering effect. In addition, the filter screen can be made of corrosion-resistant materials (such as stainless steel or high polymer materials) to adapt to the environment of the mixed liquid inside the body 1 and prolong the service life.
[0025] Preferably, as shown in the drawings, Figure 2 The two opposite side walls of the upper circulating groove 102 are respectively provided with a liquid flow passage 103 between the corresponding side wall of the lower circulating groove 101. The liquid mixer comprises multiple filters 2, which are symmetrically arranged on the upper part of the side wall of the upper circulating groove 102 adjacent to the two liquid flow passages 103. By arranging two liquid flow passages 103, the circulating flow of the mixed liquid inside the body 1 can be increased, thereby improving the circulating efficiency. In addition, two groups of filters can be installed on the upper part of the side wall of the upper circulating groove 102 adjacent to the liquid flow passage 103 to further improve the circulating efficiency.
[0026] In use, the mixed liquid in the liquid mixer is circulated from the upper circulation tank 102 to the lower circulation tank 101 through the filter 2, then is sucked by the suction port 301 of the circulation pump 3 and is discharged into the upper circulation tank 102 through the discharge port 302, so as to realize the circulation of the mixed liquid between the lower circulation tank 101 and the upper circulation tank 102. Since the upper circulation tank 102 and the lower circulation tank 101 are arranged, the length of the liquid circulation path in the whole liquid mixer is extended, so that all the liquid can participate in the circulation more fully, which helps to improve the efficiency and effect of liquid mixing. In addition, the liquid mixer of the present application arranges the filter on the wall between the upper circulation tank 102 and the lower circulation tank 101 instead of arranging it at the suction port 301 of the circulation pump 3, which effectively avoids the blockage of the suction port 301 due to the accumulation of impurities, so as to ensure that the whole liquid mixer has sufficient circulation flow and reduces the possibility of damage of the circulation pump 3, thus helping to reduce the equipment downtime and reduce the equipment maintenance cost, and improve the production efficiency.
[0027] In an embodiment, as shown in Figure 1 and Figure 2 , the liquid supplementing device 4 for supplementing the reaction liquid into the upper circulation tank 102 is further included, and the liquid supplementing device 4 includes a liquid storage tank 401 and a second liquid inlet pipe 412. The lower end of the liquid storage tank 401 is connected to a first liquid inlet pipe 411, and the first liquid inlet pipe 411 is provided with a first liquid inlet valve 421. The upper end of the liquid storage tank 401 is connected to the second liquid inlet pipe 412, and the second liquid inlet pipe 412 is provided with a second liquid inlet valve 422. In addition, the liquid supplementing device 4 can further include a weighing sensor 402 connected to the upper surface of the liquid storage tank 401 for measuring the weight of the liquid storage tank 401 in real time.
[0028] When it is necessary to supplement the reaction liquid into the body 1, the first liquid inlet valve 421 is opened, and the reaction liquid in the liquid storage tank 401 flows into the upper circulating groove 102, and then the first liquid inlet valve 421 is closed to end the reaction liquid supplement process. The weighing sensor 402 can measure the weight of the liquid storage tank 401 in real time, so as to obtain the current supplement amount of the reaction liquid in real time. In the existing etching process, an ultrasonic liquid level meter is usually arranged in the liquid storage tank 401 to measure the liquid level of the reaction liquid, so as to control the supplement amount. However, since the reaction liquid usually has high viscosity and is easy to form crystals on the surface of the ultrasonic liquid level meter, the measurement result may be inaccurate, the supplement precision is reduced, and the concentration of the mixed liquid in the body 1 is affected, thereby causing the etching quality to be reduced. In contrast, since the weighing sensor 402 is arranged outside the liquid storage tank 401, the sensor is not in contact with the reaction liquid, and the reaction liquid crystals on the surface of the sensor can be prevented, so that the sensor is effectively protected and the supplement precision is improved. In addition, after the reaction liquid supplement process is completed, the amount of the reaction liquid in the current liquid storage tank 401 can be obtained by the weighing sensor 402, and when the amount of the reaction liquid is lower than a preset threshold, the second liquid inlet valve 422 can be opened to inject the reaction liquid into the liquid storage tank 401 through the second liquid inlet pipe 412, so as to ensure that the liquid storage tank 401 always has a reaction liquid amount meeting the preset standard.
[0029] Preferably, a stirring device (not shown in the figure) can be arranged inside the liquid storage tank 401 to enhance the uniformity of the reaction liquid in the liquid storage tank 401, while avoiding the crystallization of the reaction liquid in the liquid storage tank 401, thereby protecting the liquid storage tank 401 and improving the supplement precision of the reaction liquid.
[0030] In an embodiment, as shown in Figure 1 The lower circulating groove 101 is connected with a discharge pipe 111 for discharging the mixed liquid in the body 1, and the discharge pipe 111 is provided with a discharge valve 112. In addition, the liquid mixer can further include an overflow pipe 5, a first end of the overflow pipe 5 is connected with the upper part of the side wall of the upper circulating groove 102, and a second end is connected with the discharge pipe 111. The position of the first end of the overflow pipe 5 is higher than the position of the filter 2. As shown in Figure 1 and Figure 3 When an accident occurs and the mixed liquid in the body 1 is too much, the excess liquid can flow out through the overflow pipe 5 and be further guided to a designated position for treatment, so as to avoid the mixed liquid overflowing from the upper part of the lower circulating groove 101 and the upper circulating groove 102, causing a production accident.
[0031] In an embodiment, a turbulence device (not shown in the figure) can be arranged in the lower circulation tank 101 and / or the upper circulation tank 102. Specifically, the turbulence device can be one or more of a baffle type turbulence device, a helical blade type turbulence device, a perforated plate type turbulence device, or a screen type turbulence device, without limitation. The turbulence device can enhance the degree of turbulence of the mixed liquid, avoid the formation of stagnant areas in the liquid, ensure that all the liquid can participate in the circulation, and thus improve the mixing uniformity. In addition, the turbulence device can also help to improve the working efficiency of the circulation pump by improving the flow state of the liquid, and ensure the stability of the circulation flow.
[0032] In an embodiment, as shown in FIG. 6, the liquid mixer can further include a controller 6 and a concentration sensor 104 for detecting the concentration of the reaction liquid in the mixed liquid in real time. Figure 4 The controller 6 is signal connected with the weighing sensor 402, the concentration sensor 104, the first liquid inlet valve 421, and the second liquid inlet valve 422, respectively, for obtaining the weight signal of the liquid storage tank 401 from the weighing sensor 402 and the reaction liquid concentration signal from the concentration sensor 104, and controlling the opening or closing of the first liquid inlet valve 421 and the second liquid inlet valve 422 accordingly.
[0033] In use, when the concentration sensor 104 detects that the concentration of the reaction liquid in the mixed liquid inside the body 1 falls below the preset standard, the controller 6 controls the first liquid inlet valve 421 to open, and injects the reaction liquid into the upper circulation tank 102 through the first liquid inlet pipe 411 until the concentration of the reaction liquid in the mixed liquid reaches the preset standard, and then the controller 6 controls the first liquid inlet valve 421 to close. When the weighing sensor 402 detects that the amount of the reaction liquid in the liquid storage tank 401 falls below the preset standard, the controller 6 controls the second liquid inlet valve 422 to open, so that the reaction liquid enters the liquid storage tank 401 through the second liquid inlet pipe 412 until the amount of the reaction liquid in the liquid storage tank 401 reaches the preset standard, and then the controller 6 controls the second liquid inlet valve 422 to close. By setting the controller 6 and the concentration sensor 104, it is helpful to accurately adjust the amount of the reaction liquid supplemented into the body 1, so as to ensure the uniformity and stability of the concentration of the mixed liquid, and at the same time, it is also possible to keep enough reaction liquid in the liquid storage tank 401 at all times, so as to ensure the continuity and stability of the production process. In addition, this automatic control mode reduces the need for manual operation, and reduces the risk of inaccurate liquid supplement or abnormal concentration of the mixed liquid due to human error.
[0034] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A liquid mixer characterized by, The liquid mixer comprises: a body (1) for containing a mixture of reaction liquid and water, the body (1) comprising a lower circulating groove (101) and an upper circulating groove (102) nested in the lower circulating groove (101), at least one side wall of the upper circulating groove (102) and the corresponding side wall of the lower circulating groove (101) being provided with a liquid flow channel (103); the upper circulating groove (102) is externally connected with a first liquid inlet pipe (411) for injecting reaction liquid; a filter (2) provided on the upper part of the side wall of the upper circulating groove (102) adjacent to the liquid flow channel (103), the mixture can pass through the filter (2) from the upper circulating groove (102) into the liquid flow channel (103); a circulating pump (3) provided with a suction inlet (301) and a discharge outlet (302), the suction inlet (301) is connected with the lower circulating groove (101), and the discharge outlet (302) is connected with the upper circulating groove (102); the position of the discharge outlet (302) is lower than that of the filter (2).
2. The liquid mixer of claim 1, wherein, The opposite two side walls of the upper circulating groove (102) and the corresponding side walls of the lower circulating groove (101) are provided with liquid flow channels (103); The liquid mixer comprises a plurality of filters (2), which are symmetrically arranged on the upper part of the side wall of the upper circulating groove (102) adjacent to the two liquid flow channels (103).
3. The liquid mixer of claim 1, wherein, It also comprises a liquid supplementing device (4) for supplementing reaction liquid into the upper circulating groove (102), the liquid supplementing device (4) comprising a liquid storage tank (401) and a second liquid inlet pipe (412); The lower end of the liquid storage tank (401) is connected with the first liquid inlet pipe (411), and the first liquid inlet pipe (411) is provided with a first liquid inlet valve (421); The upper end of the liquid storage tank (401) is connected with the second liquid inlet pipe (412), and the second liquid inlet pipe (412) is provided with a second liquid inlet valve (422).
4. The liquid mixer of claim 3, wherein, The liquid supplementing device (4) further comprises a weighing sensor (402) connected with the upper surface of the liquid storage tank (401) for measuring the weight of the liquid storage tank (401) in real time.
5. The liquid mixer of claim 1, wherein, The lower circulating groove (101) is externally connected with a discharge pipe (111) for discharging the mixture in the body (1), and the discharge pipe (111) is provided with a discharge valve (112).
6. The liquid mixer of claim 5, wherein, It also comprises an overflow pipe (5), the first end of the overflow pipe (5) is connected with the upper part of the side wall of the upper circulating groove (102), and the second end is connected with the discharge pipe (111); the position of the first end of the overflow pipe (5) is higher than that of the filter (2).
7. The liquid mixer of claim 1, wherein, The lower circulating groove (101) and / or the upper circulating groove (102) are provided with a flow disturbing device.
8. The liquid mixer of claim 4, wherein, It also comprises a controller (6) and a concentration sensor (104) for detecting the concentration of reaction liquid in the mixture in real time. The controller (6) is signal connected with the weighing sensor (402), the concentration sensor (104), the first liquid inlet valve (421) and the second liquid inlet valve (422) respectively, for acquiring the weight signal of the liquid storage tank (401) from the weighing sensor (402) and the reaction liquid concentration signal from the concentration sensor (104), and correspondingly controlling the first liquid inlet valve (421) and the second liquid inlet valve (422) to open or close.