Liquid supply system

Abstract

The utility model discloses a liquid supply system, and relates to the technical field of solar cell wet production, the liquid supply system is used for supplying liquid to solar cell wet production equipment, and the liquid supply system comprises a liquid mixing system and a liquid storage system; the liquid mixing system comprises a liquid mixing container and a stirring device; a feeding hole, a first liquid inlet and a first liquid outlet are formed in the liquid mixing container; the first liquid inlet is used for being externally connected with a water supply system; the stirring device is arranged on the liquid mixing container and is used for stirring liquid in the container; the liquid storage system comprises a liquid storage container; a second liquid inlet and a second liquid outlet are formed in the liquid storage container; the second liquid inlet is communicated with the first liquid outlet, and a first liquid outlet valve is arranged between the second liquid inlet and the first liquid outlet; and the second liquid outlet is connected with a liquid outlet pipeline and a metering pump arranged on the liquid outlet pipeline. The liquid supply system has the advantages that the occupied space is small, and the functions of liquid preparation, liquid storage and liquid supplementation are completed at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of wet production of solar cells, in particular to a liquid supply system for wet production equipment of solar cells. Background Art

[0002] In the manufacturing process of silicon-based solar cells, a variety of additives that account for more than 90% of water are mainly used, such as texturing, alkali polishing, de-coating and cleaning. The annual consumption of these additives is huge, resulting in high transportation and packaging costs, most of which are ineffective costs. During the production process, a small amount of additives is often required to be replenished, but due to the accuracy of the equipment, a diluted solution containing 90% water must be used to ensure the accuracy of the replenishment. This practice has brought about a series of problems such as high costs, waste of human resources, excessive storage space and difficulties in on-site operations, which is not conducive to reducing the cost of the solar industry and improving its competitiveness.

[0003] Therefore, technicians in this field need to develop a liquid supply system for solar cell wet production equipment to solve the problem of space occupation by additives and simultaneously complete the functions of liquid preparation, liquid storage and liquid replenishment. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a liquid supply system for solar cell wet process production equipment, which has the advantages of occupying a small space and completing the functions of liquid preparation, liquid storage and liquid replenishment at the same time.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a liquid supply system for supplying liquid to a wet process production equipment for solar cells, the liquid supply system comprising a liquid mixing system and a liquid storage system; the liquid mixing system comprising a liquid mixing container and a stirring device; the liquid mixing container is provided with a feeding port, a first liquid inlet and a first liquid outlet; the first liquid inlet is used for an external water supply system; the stirring device is arranged on the liquid mixing container and is used to stir the liquid in the container; the liquid storage system comprises a liquid storage container; the liquid storage container is provided with a second liquid inlet and a second liquid outlet; the second liquid inlet is connected to the first liquid outlet and a first liquid outlet valve is arranged between the two; the second liquid outlet is connected to a liquid outlet pipeline and a metering pump arranged on the liquid outlet pipeline.

[0006] Optionally, the stirring device includes a circulation pipeline and a circulation pump arranged on the circulation pipeline; one end of the circulation pipeline is connected to the first liquid outlet, and the other end is connected to the first liquid inlet.

[0007] Optionally, a second pump is provided on the pipeline between the second liquid inlet and the second liquid outlet.

[0008] Optionally, the second pump on the pipeline between the second liquid inlet and the second liquid outlet and the circulation pump of the circulation pipeline are the same pump that is reused; the liquid outlet side of the circulation pump is connected to the first liquid inlet and the second liquid inlet respectively through a pipeline connector, and corresponding valves are provided on the liquid outlet side of the pipeline connector to the first liquid inlet and the second liquid inlet respectively.

[0009] Optionally, the mixing liquid system also includes a drainage pipeline, which is provided with a drain valve; a first pipe connector is provided on the liquid outlet side of the circulating pump, and the first pipe connector has at least three pipe openings, one of which is connected to the liquid outlet side of the circulating pump, another is connected to the drainage pipeline, and another is connected to the first liquid inlet.

[0010] Optionally, the mixing liquid system also includes a water supply pipeline; the water supply pipeline includes a first water inlet pipe, a second water inlet pipe and a second pipe connector; one end of the first water inlet pipe and one end of the second water inlet pipe are used for an external water supply system, and the other end of the first water inlet pipe and the other end of the second water inlet pipe are connected to the first liquid inlet through the second pipe connector; a third valve is provided on the first water inlet pipe, and a fourth valve is provided on the second water inlet pipe; the flow rate of the third valve is greater than the flow rate of the fourth valve.

[0011] Optionally, the liquid mixing system further comprises a first weighing device for detecting the weight of the reagent.

[0012] Optionally, the liquid mixing system further comprises a second weighing device for detecting the weight of the liquid storage container; the liquid storage container is mounted on the second weighing device.

[0013] Optionally, the liquid storage system further includes a liquid level detection device disposed in the liquid storage container.

[0014] Optionally, it also includes a multi-channel fluid infusion pipeline system; the multi-channel fluid infusion pipeline system includes a multi-channel fluid infusion pipeline and a third pipeline connector, each pipeline in the multi-channel fluid infusion pipeline is provided with a liquid supply valve; the multi-channel fluid infusion pipeline is connected to the liquid outlet pipeline through the third pipeline connector.

[0015] Optionally, the third pipe connector has a plurality of pipe openings, one of which is connected to the second liquid inlet via a pipeline, and a reflux valve is provided on the pipeline between the two.

[0016] These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. The best implementation or means of the utility model will be fully presented in conjunction with the drawings, but it is not a limitation of the technical solution of the utility model. In addition, these features, elements and components appearing in each of the following texts and drawings are multiple, and are marked with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a simplified structural diagram of the liquid supply system.

[0019] Figure 2 It is a structural schematic diagram of the liquid supply system.

[0020] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0021] Figure 4 It is a schematic structural diagram of the liquid mixing container, showing a second weighing device at its supporting feet.

[0022] Figure 5 It is a front view of the liquid supply system.

[0023] Among them, 100, mixing liquid container; 110, feeding port; 120, first liquid inlet; 121, first liquid outlet valve; 130, first liquid outlet; 200, liquid storage container; 210, second liquid inlet; 220, second liquid outlet; 221, metering pump; 310, circulation pipeline; 320, circulation pump; 321, first valve; 322, second valve; 323, drain valve; 324, sixth valve; 410, third valve; 420, fourth valve; 430, fifth valve; 510, reflux valve; 520, liquid supply valve; 610, first weighing device; 620, second weighing device; 710, liquid level detection device. DETAILED DESCRIPTION

[0024] The following is a detailed description of embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of the present invention, unless otherwise specified, "plurality" means two or more, and "several" means one or more.

[0028] References to "one embodiment" or "an example" or "an example" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment disclosed in the present utility model. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0029] In the production process of silicon-based solar cells, a variety of additives are needed, including texturing additives, alkali polishing additives, de-wrap additives and cleaning additives. More than 90% of these additives are water, while the weight of the actual effective agents is less than 10%. At present, the annual usage of a single additive has exceeded 25,000 tons, and the total usage of the three most commonly used additives exceeds 75,000 tons, of which more than 60,000 tons are water. Since the existing packaging method uses 10-liter barrels for packaging and transportation, more than 90% of the transportation and packaging costs have become ineffective costs.

[0030] During the preparation process, it is sometimes necessary to rehydrate the additive. Since the rehydration volume is usually low, only 150-200ml per batch, and high mass fraction reagents are used, the rehydration accuracy of existing equipment is only ±10ml. If all the water is removed from the reagent, the rehydration accuracy may be insufficient and cannot be used normally. Therefore, in actual operation, it is necessary to first use a diluted solution containing 90% water for rehydration.

[0031] However, there are several problems with the existing method: first, more than 90% of the packaging and transportation costs of water are ineffective, which increases the cost of additives and ultimately increases the selling price, which is not conducive to the solar industry to further reduce costs and enhance competitiveness; second, the production process of additives requires 90% of water to be prepared into a solution and packaged, which not only consumes a lot of manpower but also increases labor costs; third, a large amount of storage space is required at the customer site to store additives, resulting in serious occupation of storage space; finally, the production personnel at the customer site need to pour the additives into the equipment, which is very labor intensive and requires a lot of work.

[0032] To this end, the present embodiment provides a liquid supply system, which can dilute high-concentration additives (i.e., concentrated liquid), and after adjusting to the set concentration requirement, it is transported to the solar cell wet production equipment for liquid supply, so that in the solar cell wet production process, not only the space transportation and storage costs of additives can be reduced, but also space occupation and labor costs can be saved, and it has the advantage of simultaneously completing the functions of liquid preparation, liquid storage and liquid replenishment.

[0033] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the liquid supply system includes a liquid mixing system and a liquid storage system. The liquid mixing system is used to fully stir and mix a certain amount of additive concentrate and a corresponding amount of water to adjust a preset concentration. Then it is transported to the liquid storage system for storage and standby, and multiple liquids are centrally supplied to the solar cell wet process production equipment.

[0034] The liquid mixing system includes a liquid mixing container 100 and a stirring device. The liquid mixing container 100 is a vertical tank container, including a tank body, which is vertically arranged by a bracket, and has a feeding port 110 and a first liquid inlet 120 on the top and a first liquid outlet 130 on the bottom.

[0035] The feeding port 110 is used to feed the concentrated liquid of the additive. Each portion of the concentrated liquid is packaged into a standard amount. According to the capacity of the tank body, the actual amount of water added and the target concentration of the additive dilution, an appropriate amount of the concentrated liquid of the additive is fed. If the added concentrated liquid is not of a standard amount, it needs to be weighed in advance with the help of a weighing device. In some embodiments, the mixing system is also equipped with a first weighing device 610 specifically used to detect the weight of the reagent (i.e., the concentrated liquid) near the tank body of the mixing container 100. In addition, in order to prevent foreign objects from falling into the tank from the feeding port and causing contamination, a lid that can be opened and closed is provided on the feeding port.

[0036] The first liquid inlet 120 is used for an external water supply system, through which a corresponding amount of water can be quantitatively added. The stirring device is arranged on the mixing container 100 and is used to stir the liquid in the container. For example, the stirring device can adopt a stirring paddle, by arranging the stirring paddle in the tank body, the stirring part of the stirring paddle is located at the center of the bottom of the tank body and does not contact the inner wall of the tank body. The rotating shaft of the stirring paddle extends vertically upward and passes through the top of the tank body, and is connected to a driving device arranged outside the tank body. The driving device can be arranged on the tank body, or fixed on other fixed brackets, and does not contact the tank body.

[0037] The liquid storage system includes a liquid storage container 200. Similarly, the liquid storage container 200 adopts the same structure as the liquid mixing container 100, and also adopts a vertical tank container with the same capacity or larger capacity. In this way, when the liquid mixing container 100 completes the liquid preparation, all the solutions can be completely transported to the liquid storage container 200.

[0038] The top of the tank body of the liquid storage container 200 is provided with a second liquid inlet 210, and the bottom is provided with a second liquid outlet 220. The second liquid inlet 210 is connected with the first liquid outlet 130, and a first liquid outlet valve 121 is provided between the first liquid outlet 130 and the second liquid inlet 210 to control the on-off state of the pipeline between the two. For example, the liquid mixing container 100 is arranged above the liquid storage container 200, so that when the first liquid outlet valve 121 is opened, the prepared solution in the liquid mixing container 100 can directly flow into the liquid storage container 200 below by gravity, without the need for an additional pump for transportation.

[0039] The second liquid outlet 220 is connected to a liquid outlet pipeline and a metering pump 221 disposed on the liquid outlet pipeline. The metering pump 221 can accurately control the flow rate when supplying liquid to the solar cell wet process production equipment, so that the amount can be estimated, and the liquid can be mixed in advance before it is completely consumed, so that it can be replenished in time.

[0040] In this embodiment, the concentrated liquid can be configured into a solution with specified concentration requirements through the liquid mixing system and the liquid storage system, and accurately supplied to the solar cell wet production equipment, so that in the solar cell wet production process, not only the space transportation and storage costs of additives can be reduced, but also the space occupation and labor costs can be saved, and it has the advantage of completing the functions of liquid preparation, liquid storage and liquid replenishment at the same time.

[0041] The stirring device may also be arranged outside the tank. For example, in some embodiments, the stirring device includes a circulation pipeline 310 and a circulation pump 320 arranged on the circulation pipeline 310. One end of the circulation pipeline 310 is connected to the first liquid outlet 130, and the other end is connected to the first liquid inlet 120. After the water and the concentrate are added to the mixed liquid container 100, the first liquid outlet valve 121 of the first liquid outlet 130 is opened, and the circulation pump 320 is started at the same time. The liquid enters the circulation pipeline 310 from the first liquid outlet 130 and is pumped to the first liquid inlet 120 by the circulation pump 320. Since the liquid is located at a higher position than the first liquid inlet 120, the liquid can be disturbed when it falls back from the first liquid inlet 120 into the mixed liquid container 100. The circulation pump 320 works continuously for a certain time, such as 0.5 hours, 1 hour, 2 hours, etc., so as to achieve the purpose of mixing and stirring evenly.

[0042] In some embodiments, the mixing container 100 and the liquid storage container 200 are arranged at the same height, and a second pump is provided on the pipeline between the second liquid inlet 210 and the second liquid outlet 220. The second pump can pump the mixed solution in the mixing container 100 into the liquid storage container 200 for standby use.

[0043] In some embodiments, the second pump on the pipeline between the second liquid inlet 210 and the second liquid outlet 220 and the circulation pump 320 of the circulation pipeline 310 are the same pump that is reused. Accordingly, the liquid outlet side of the circulation pump 320 is connected to the first liquid inlet 120 and the second liquid inlet 210 through a pipeline connector, and corresponding valves are provided on the liquid outlet side of the pipeline connector to the first liquid inlet 120 and the second liquid inlet 210. Figure 1 As shown, the pipeline connector adopts a three-way pipe, and the three-way pipe has three pipe openings, one of which is connected to the liquid outlet side of the circulation pump 320 in the circulation pipeline 310, another pipe opening is connected to the first liquid inlet 120 pipeline, and another pipe opening is connected to the second liquid inlet 210 pipeline. A first valve 321 is provided between another pipe opening of the three-way pipe and the first liquid inlet 120, and a second valve 322 is provided between another pipe opening of the three-way pipe and the second liquid inlet pipe. When working, one of the two valves is selectively opened, and they are not opened at the same time.

[0044] In some embodiments, the liquid mixing system further comprises a liquid discharge pipeline, which is used to discharge waste liquid after the liquid mixing container 100 in the liquid mixing system is cleaned with clean water after the solution is prepared. A drain valve 323 is provided on the liquid discharge pipeline, and the drain valve 323 is only opened when discharging liquid. Specifically, a first pipe connector is provided on the liquid outlet side of the circulation pump 320, and the first pipe connector has at least three pipe openings, one of which is connected to the liquid outlet side of the circulation pump 320, another is connected to the liquid discharge pipeline, and another is connected to the first liquid inlet 120.

[0045] In addition, in the embodiment where the second pump is reused with the circulation pump 320, the first pipe connector has four pipe openings, wherein the fourth pipe opening is communicated with the second liquid inlet 210. It should be noted that the first pipe connector is not limited to one, and a plurality of pipe connectors with a smaller number of pipe openings and a plurality of pipes can be used in combination to realize four pipe openings, such as connecting a tee pipe at each end of a pipe.

[0046] Similarly, a separate liquid discharge pipeline may be provided for the liquid storage container 200 of the liquid storage system, or Figure 1 As shown in FIG. 1 , the second liquid outlet 220 of the liquid storage container 200 is connected to the liquid inlet side of the circulation pump 320 through a pipeline, and a sixth valve 324 is provided on the pipeline between the second liquid outlet 220 and the liquid inlet side of the circulation pump 320. The sixth valve 324 is only opened together with the drain valve 323 when the waste liquid is discharged after the liquid storage container 200 is cleaned. At the same time, the second liquid inlet 210 of the liquid storage container 200 is also connected to a water supply pipe for adding clean water during cleaning, and a fifth valve 430 is provided on the water supply pipe.

[0047] In some embodiments, the liquid mixing system further includes a water supply pipeline. The water supply pipeline includes a first water inlet pipe, a second water inlet pipe, and a second pipe connector. One end of the first water inlet pipe and one end of the second water inlet pipe are used to connect to an external water supply system, and the other end of the first water inlet pipe and the other end of the second water inlet pipe are connected to the first liquid inlet 120 through the second pipe connector. A third valve 410 is provided on the first water inlet pipe, and a fourth valve 420 is provided on the second water inlet pipe. The flow rate of the third valve 410 is greater than the flow rate of the fourth valve 420. For example, the third valve 410 adopts a ball valve, and the fourth valve 420 adopts a solenoid valve. When the ball valve is opened, the flow rate is large and water can be quickly inlet, while the solenoid valve has a small flow rate when it is opened, but the response is sensitive and rapid. Therefore, when filling the mixing liquid container 100 with water, first quickly fill the water through the third valve 410 until it reaches a preset capacity and stops. For example, the preset capacity is 1000L. When the amount of water injected is close to the 1000L mark, switch the fourth valve 420 to perform small flow and precise addition.

[0048] In some embodiments, in order to further ensure the accuracy of the amount of additives and water added, the liquid mixing system further includes a first weighing device 610 for detecting the weight of the reagent and a second weighing device 620 for detecting the weight of the liquid storage container 200. For example, the first load-bearing device is a platform scale, which is set on a high platform next to the liquid mixing container 100, so that after the additives are loaded, the material can be directly fed through the feeding port 110. The liquid storage container 200 is mounted on the second weighing device 620. Figure 4 As shown, four supporting feet are provided at the bottom of the mixed liquid container 100, and the supporting feet are distributed around the circumference of the mixed liquid container 100. The second load-bearing device includes a load-bearing sensor arranged at the bottom of each supporting foot, which detects the weight of the four supporting feet and then calculates the weight of the entire mixed liquid container 100 and the solution therein.

[0049] It should be noted that the first liquid inlet 120 and the first liquid outlet 130 of the liquid mixing container 100 are connected in a flexible or detachable manner in the connecting pipeline. Figure 3 In the embodiment, the diameter of the first liquid inlet 120 is larger than the opening of the water inlet pipe connected thereto, that is, there is a gap between the two and they are not in contact, and the water inlet pipe extends into the first liquid inlet 120 by a distance of one end. And the first liquid outlet 130 is connected to the pipeline in a flexible manner.

[0050] In some embodiments, in order to monitor the remaining amount of solution in the liquid storage container 200, the liquid storage system further includes a liquid level detection device 710 disposed in the liquid storage container 200. Figure 1 and Figure 2 As shown, the liquid level detection device 710 is suspended in the liquid outlet container, and the upper end of the liquid level detection device 710 is connected to the top of the liquid storage container 200.

[0051] In some embodiments, a multi-channel infusion pipeline system is also included. The multi-channel infusion pipeline system includes a multi-channel infusion pipeline and a third pipeline connector. A liquid supply valve 520 is provided on each pipeline of the multi-channel infusion pipeline. The multi-channel infusion pipeline is connected to the liquid outlet pipeline through the third pipeline connector. The third pipeline connector is not limited to one, and can be a plurality of pipeline connectors combined together. The number of pipe openings of the third pipeline connector is greater than the number of the infusion pipelines.

[0052] In some embodiments, the third pipe connector has multiple pipe openings, one of which is connected to the second liquid inlet 210 through a pipeline and a reflux valve 510 is provided on the pipeline between the two, and the multiple fluid replenishment pipelines correspond to and are connected to the remaining pipe openings of the third pipe connector.

[0053] By setting up multiple liquid replenishment pipelines and providing an openable and closable liquid supply valve 520 for each liquid replenishment pipeline, and then cooperating with a metering pump 221 close to the second liquid outlet 220, accurate liquid replenishment for multiple solar cell wet process production equipment can be achieved.

[0054] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A liquid supply system for supplying liquid to a solar cell wet process production device, characterized in that: The liquid supply system includes a liquid mixing system and a liquid storage system; The liquid mixing system comprises a liquid mixing container (100) and a stirring device; the liquid mixing container (100) is provided with a feeding port (110), a first liquid inlet (120) and a first liquid outlet (130); the first liquid inlet (120) is used for connecting to an external water supply system; the stirring device is arranged on the liquid mixing container (100) and is used for stirring the liquid in the container; The liquid storage system comprises a liquid storage container (200); the liquid storage container (200) is provided with a second liquid inlet (210) and a second liquid outlet (220); the second liquid inlet (210) is connected to the first liquid outlet (130) and a first liquid outlet valve (121) is provided between the two; the second liquid outlet (220) is connected to a liquid outlet pipeline and a metering pump (221) provided on the liquid outlet pipeline.

2. The liquid supply system according to claim 1, characterized in that: The stirring device comprises a circulation pipeline (310) and a circulation pump (320) arranged on the circulation pipeline (310); one end of the circulation pipeline (310) is connected to the first liquid outlet (130), and the other end is connected to the first liquid inlet (120).

3. The liquid supply system according to claim 2, characterized in that: A second pump is provided on the pipeline between the second liquid inlet (210) and the second liquid outlet (220).

4. The liquid supply system according to claim 3, characterized in that: The second pump on the pipeline between the second liquid inlet (210) and the second liquid outlet (220) and the circulation pump (320) of the circulation pipeline (310) are the same pump that is reused; the liquid outlet side of the circulation pump (320) is connected to the first liquid inlet (120) and the second liquid inlet (210) respectively through a pipeline connector, and corresponding valves are provided on the liquid outlet side of the pipeline connector to the first liquid inlet (120) and the second liquid inlet (210).

5. The liquid supply system according to claim 2, characterized in that: The liquid mixing system further comprises a liquid discharge pipeline, on which a drain valve (323) is provided; a first pipe connector is provided on the liquid outlet side of the circulation pump (320), and the first pipe connector has at least three pipe openings, one of which is connected to the liquid outlet side of the circulation pump (320), another is connected to the liquid discharge pipeline, and another is connected to the first liquid inlet (120).

6. The liquid supply system according to claim 1, characterized in that: The liquid mixing system also includes a water supply pipeline; the water supply pipeline includes a first water inlet pipe, a second water inlet pipe and a second pipe connector; one end of the first water inlet pipe and one end of the second water inlet pipe are used for external water supply system, and the other end of the first water inlet pipe and the other end of the second water inlet pipe are connected to the first liquid inlet (120) through the second pipe connector; a third valve (410) is provided on the first water inlet pipe, and a fourth valve (420) is provided on the second water inlet pipe; the flow rate of the third valve (410) is greater than the flow rate of the fourth valve (420).

7. The liquid supply system according to any one of claims 1 to 6, characterized in that: The liquid mixing system further comprises a first weighing device (610) for detecting the weight of the reagent; And / or, the liquid mixing system further comprises a second weighing device (620) for detecting the weight of the liquid storage container (200); the liquid storage container (200) is mounted on the second weighing device (620).

8. The liquid supply system according to any one of claims 1 to 6, characterized in that: The liquid storage system further comprises a liquid level detection device (710) arranged in the liquid storage container (200).

9. The liquid supply system according to any one of claims 1 to 6, characterized in that: It also includes a multi-channel fluid infusion pipeline system; the multi-channel fluid infusion pipeline system includes a multi-channel fluid infusion pipeline and a third pipeline connector, each pipeline in the multi-channel fluid infusion pipeline is provided with a liquid supply valve (520); the multi-channel fluid infusion pipeline is connected to the liquid outlet pipeline through the third pipeline connector.

10. The liquid supply system according to claim 9, characterized in that: The third pipe connector has a plurality of pipe openings, one of which is connected to the second liquid inlet (210) via a pipeline, and a reflux valve (510) is provided on the pipeline between the two.

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