LU503533A1

LU503533A1 - Solution preparation and dispensation device

Info

Publication number: LU503533A1
Application number: LU503533A
Authority: LU
Inventors: ruiming Kou; Yang Liu; Haibo Zhang; Huajian Shang; Jianwei Lin; Chuanchuan Zhao; Zhijin Guo; Xiaofang Shen
Original assignee: Univ Hubei Arts & Science
Priority date: 2022-03-14
Filing date: 2022-11-02
Publication date: 2023-09-14
Also published as: WO2023173761A1; LU503533B1; CN114768671B; CN114768671A

Abstract

Disclosed are a solution preparation and dispensation device, including: a preparation assembly, a production assembly, and a dispensing assembly. The preparation assembly includes a plurality of first liquid-outlet devices, the production assembly includes a first chamber, the first chamber is communicated with outlets of the plurality of first liquid-outlet devices, and a mixing device is provided in the first chamber. The dispensing assembly includes a second liquid-outlet device, and an inlet of the second liquid-outlet device is communicated with the first chamber. The first liquid-outlet device and the second liquid-outlet device are both provided with a second chamber, an inlet and an outlet of the second chamber is the inlet and an outlet of the first liquid-outlet device, an overflow valve is provided at the outlet of the second chamber, and a pushing assembly is provided in the second chamber.

Description

SOLUTION PREPARATION AND DISPENSATION DEVICE

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This disclosure claims priority to Chinese Patent application No. 202210261338.7, filed on March 14, 2022, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of chemical solution preparation technology, and in particular to a solution preparation and dispensation device.

BACKGROUND

[0003] The biochemistry field is developed from various professional experiments completed by the experimenters in the laboratory. With the expansion of knowledge, harmful and volatile solvents will inevitably be used during experiments, such as a concentrated hydrochloric acid, a concentrated nitric acid, a glacial acetic acid, methanol, concentrated ammonia, ether, acetone, and chloroform, etc., which are toxic or highly corrosive, have a pungent odor and are easily volatile, and mostly used for pH adjustment, electrophoresis buffers, silver mirror reactions, experiments animal anesthesia, wiping microscope oil lens, tissue fixation, and RNA extraction experiments, etc. However, since this kind of toxic solution is highly volatile and has a certain toxicity that endangers human, it is generally necessary to prepare it only before the experiment and use it immediately. However, measuring the volume only by the measuring cylinder, mixing in a beaker and stirring with a glass rod to prepare the solution not only brings a huge burden to the experimental preparation, but also the toxic solution volatilized during the preparation will also cause certain harm to the experimenter. In addition to the need to prepare a large number of these toxic and volatile solutions in experiments, the required amount is also very large due to a larger number of students in teaching experiments. The workload of manual preparation of solutions is large and it is difficult to ensure the accuracy. There exist problems of poor accuracy, low efficiency and great harm.

SUMMARY

LU503533

[0004] The main objective of this disclosure is to provide a solution preparation and dispensation device, aiming to solve the problem of poor accuracy, low efficiency, and high harm when the preparation and dispensation of the toxic and volatile solutions are performed manually.

[0005] To achieve the above purpose, the present disclosure provides a solution preparation and dispensation device, including: a preparation assembly, a production assembly, and a dispensing assembly.

[0006] In an embodiment, the preparation assembly includes a plurality of first liquid-outlet devices, each of the outlet devices is used to control a quantitative outflow of a solution; the production assembly includes a first chamber, the first chamber is communicated with outlets of the plurality of first liquid-outlet devices, and a mixing device is provided in the first chamber and used to mix different solutions from the plurality of first liquid-outlet devices; the dispensing assembly includes a second liquid-outlet device, an inlet of the second liquid-outlet device is communicated with the first chamber, and the second liquid-outlet device is used to control a quantitative outflow of a mixed solution; and the first liquid-outlet device and the second liquid-outlet device are both provided with a second chamber, an inlet and an outlet of the second chamber is the inlet and an outlet of the first liquid-outlet device, an overflow valve is provided at the outlet of the second chamber, a pushing assembly is provided in the second chamber and used to push a quantitative solution to the outlet of the second chamber to open the overflow valve for outflow of the solution.

[0007] In an embodiment, the flow sensing device is used in the second chamber to detect flow out from the second chamber.

[0008] In an embodiment, the second chamber is cylindrical with a cross-sectional area S, the outlet and the inlet of the chamber are provided on a first end of the second chamber, the pushing assembly includes: a piston rod and a driving assembly. The piston rod is provided on an end of a second end of the second chamber and movably along an axis of the second chamber; the driving assembly is used to drive the piston rod to move toward the outlet of the second chamber; and the flow sensing device includes a displacement sensor fixed on the piston rod for detecting a distance L that the piston rod moves toward the outlet of the second chamber, a volume V of outflow is equal to S-L.

[0009] In an embodiment, the driving assembly includes an air pump for providing an air pressure to push the piston rod to move, and the air pump is communicated with the second

LU503533 end of the second chamber.

[0010] In an embodiment, a rated air pressure P is provided by the air pump, an intensity of pressure threshold of the overflow valve is PO, and P is equal PO.

[0011] In an embodiment, an elastic structure is connected between the piston rod and the end of the second end of the second chamber; and an exhaust port is provided on the second end of the second chamber for releasing the pressure to make the elastic structure to drive the piston rod back to the end of the second end of the second chamber.

[0012] In an embodiment, the second chambers of the plurality of first outlet devices are all connected to a same air pump.

[0013] In an embodiment, the second chamber is further communicated with a waste tank, the waste tank is used to recycle a solution of the second chamber when being opened.

[0014] In an embodiment, the waste tank is further provided with a waste outlet for communicating with a sewer.

[0015] In an embodiment, the mixing device includes a stirrer.

[0016] In the technical solution of the present disclosure, the preparation assembly, the production assembly and the dispensing assembly are provided, various kinds of solutions are respectively accommodated in a plurality of first liquid-outlet devices in the preparation assembly, when an individual usage amount of each solution is given, the first liquid-outlet device controls a quantitative solution to flow out to the production assembly, a variety of solutions are mixed in the mixing device of the production assembly to produce a required mixed solution, then the mixed solution is guided into the dispensing assembly. The outflow of a quantitative solution every time is controlled by the second liquid-outlet device in the dispensing assembly controls a quantitative solution to flow out to achieve a quantitative dispersion of solutions in the dispensing assembly, a quantitative dispersion of the mixed solution after the quantitative and accurate preparation and production of the multiple solutions is realized by the integrated device, which meets needs of a large-dose preparation and a small-dose dispersion during an experiment. The non-manual production and dispersion process, with a high efficiency and a tight seal, prevents a volatilization of the harmful solutions into the air, so that the experimenter will be protected from an inhalation or exposure. The first liquid-outlet device and the second liquid-outlet device are both provided with the second chamber 4, each inlet of the second chamber in the first liquid-outlet device is used to accommodate a single solution. The outlet is communicated with the first chamber, and the overflow valve is provided to open/close the outlet , so that the quantity of solutions can be controlled in cooperation with the pushing assembly , which is more accurate than a manual control. The inlet of the second chamber in the second liquid-outlet device is communicated with the first chamber. After the solutions are mixed in the production assembly, the mixed solution is guided into the second chamber of the second liquid-outlet device. The outlet of the second chamber is also provided with an overflow valve , which cooperates with the pushing assembly to let the quantitative solution flow out every time, to realize the dispersion of a solution when taking solution in the experiment.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to illustrate the embodiments of the present disclosure or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without any creative effort.

[0018] FIG. 1 is a simplified schematic plan view of a solution preparation and dispensation deviceaccording to an embodiment of the present disclosure.

[0019] The realization of the objective, functional characteristics and advantages of the present disclosure will be further described with reference to the accompanying drawings in conjunction with the embodiments.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions of the embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It is obvious that the embodiments to be described are only some rather than all of the embodiments of the present disclosure. All other embodiments obtained by persons skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the scope of the present disclosure.

[0021] It should be noted that if there are directional indications, such as up, down, left, right, front, back, etc, involved in the embodiments of the present disclosure, the directional indications are only used to explain a certain posture as shown in the accompanying drawings. If the specific posture changes, the directional indication also changes accordingly.

LU503533

[0022] In addition, if there are descriptions related to “first”, “second”, etc. in the embodiments of the present disclosure, the descriptions of “first”, “second”, etc. are only for the purpose of description, and should not be construed as indicating or implying relative 5 importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of those features. In addition, the meaning of “and/or” appears in the whole text includes three parallel schemes, “A and/or B” as an example includes a scheme A, or a scheme B, or a scheme A and B.

In addition, the technical solutions of the various embodiments can be combined with each other, but must be based on the realization by those skilled in in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist or fall within the scope of protection claimed in this disclosure.

[0023] The biochemistry field is developed from various professional experiments completed by the experimenters in the laboratory. With the expansion of knowledge, harmful and volatile solvents will inevitably be used during experiments, such as a concentrated hydrochloric acid, a concentrated nitric acid, a glacial acetic acid, methanol, concentrated ammonia, ether, acetone, and chloroform, etc., which are toxic or highly corrosive, have a pungent odor and are easily volatile, and mostly used for pH adjustment, electrophoresis buffers, silver mirror reactions, experiments animal anesthesia, wiping microscope oil lens, tissue fixation, and RNA extraction experiments, etc. However, since this kind of toxic solution is highly volatile and has a certain toxicity that endangers human, it is generally necessary to prepare it only before the experiment and use it immediately. However, measuring the volume only by the measuring cylinder, mixing in a beaker and stirring with a glass rod to prepare the solution not only brings a huge burden to the experimental preparation, but also the toxic solution volatilized during the preparation will also cause certain harm to the experimenter. In addition to the need to prepare a large number of these toxic and volatile solutions in experiments, the required amount is also very large due to a larger number of students in teaching experiments. The workload of manual preparation of solutions is large and it is difficult to ensure the accuracy. There exist problems of poor accuracy, low efficiency and great harm.

[0024] In view of this, the present disclosure provides a solution preparation and dispensation device. FIG. 1 is an embodiment of the solution preparation and dispensation device provided by the present disclosure. The solution preparation and dispensation device will be described below with reference to the specific drawings.

LU503533

[0025] Referring to FIG. 1, the solution preparation and dispensation device 100 includes a preparation assembly 1, a production assembly 2 and a dispensing assembly 3, the preparation assembly 1 includes a plurality of first liquid-outlet devices 11, each of which is used to control a quantitative outflow of a solution. The production assembly 2 includes a first chamber 21 communicated with the plurality of the first liquid-outlet devices 11. The first chamber 21 is provided with a mixing device 22 to mix different solutions from the plurality of first liquid-outlet devices 11. The dispensing assembly 3 includes a second liquid-outlet device 31, an inlet 41 of which is communicated with the first chamber 21. The second liquid-outlet device 31 is used to control a quantitative outflow of a mixed solution. Both the first liquid-outlet device 11 and the second liquid-outlet device 31 are provided with a second chamber 4, which is provided with the inlet 41 and the outlet 42. The outlet 42 is provided with an overflow valve 421, the second chamber 4 is provided with a pushing assembly 43 used to push a quantitative solution to the outlet 42 of the second chamber to open the overflow valve for outflow of the solution.

[0026] In the technical solution of the present disclosure, the preparation assembly 1, the production assembly 2 and the dispensing assembly 3 are provided, various kinds of solutions are respectively accommodated in a plurality of first liquid-outlet devices 11 in the preparation assembly 2, when an individual usage amount of each solution is given, the first liquid-outlet device 11 controls a quantitative solution to flow out to the production assembly 2, a variety of solutions are mixed in the mixing device 22 of the production assembly 2 to produce a required mixed solution, then the mixed solution is guided into the dispensing assembly 3. The outflow of a quantitative solution every time is controlled by the second liquid-outlet device 31 in the dispensing assembly 3 controls a quantitative solution to flow out to achieve a quantitative dispersion of solutions in the dispensing assembly 3, a quantitative dispersion of the mixed solution after the quantitative and accurate preparation and production of the multiple solutions is realized by the integrated device, which meets needs of a large-dose preparation and a small-dose dispersion during an experiment. The non-manual production and dispersion process, with a high efficiency and a tight seal, prevents a volatilization of the harmful solutions into the air, so that the experimenter will be protected from an inhalation or exposure. The first liquid-outlet device 11 and the second liquid-outlet device 31 are both provided with the second chamber 4, each inlet 41 of the second chamber 4 in the first liquid-outlet device 11 is used to accommodate a single solution. The outlet 42 is communicated with the first chamber

21, and the overflow valve 421 is provided to open/close the outlet 42, so that the quantity of solutions can be controlled in cooperation with the pushing assembly 43, which is more 0 accurate than a manual control. The inlet 41 of the second chamber 4 in the second liquid-outlet device 31 is communicated with the first chamber 21. After the solutions are mixed in the production assembly 2, the mixed solution is guided into the second chamber 41 of the second liquid-outlet device 31. The outlet 42 of the second chamber 41 is also provided with an overflow valve 421, which cooperates with the pushing assembly 43 to let the quantitative solution flow out every time, to realize the dispersion of a solution when taking solution in the experiment.

[0027] The inlet 41 of the first liquid-outlet device 11 and the second liquid-outlet device 31 are both provided with a valve body which can be opened and closed under control, and the valve body may be manually controlled. In the embodiment, it can be a solenoid valve. On the one hand, it can be operated by remote electrical connection, with no requirement for an additional operation area, which is convenient for installation and use. On the other hand, it has a control scalability, such as setting a program to realize an automatic operation of a whole process or install a monitoring system to automatically monitor a status of each valve body, etc. to achieve automatic control.

[0028] A flow sensing device 44 is disposed in the second chamber 4 to detect flow from the second chamber 4. The second chamber 4 may be made of a non-transparent material or the second chamber 4 may be located in an invisible place, so it is impossible to monitor an amount of solution by setting a scale on the second chamber 4, considering an accuracy of an artificial visual detection is not very high. In the embodiment, the flow sensing device 44 is disposed in the second chamber 4 to automatically detect the flow. On the one hand, it does not require user’s operation, thus simple and fast. On the other hand, an accuracy of the preparation and dispensation is improved. The flow sensing device 44 can be a weight sensing device, which obtains a total amount of the used solution according to a weight difference of the second chamber 4, or it can be a flow valve, which obtains the used solution by directly measuring a total flow that runs through the valve body, which is not limited herein, only if an amount of the used solution can be accurately obtained.

[0029] The second chamber 4 is of cylindrical shape with a cross-sectional area S, the outlet 42 and the inlet 41 are disposed at a first end of the second chamber 4. The pushing assembly 43 includes a piston rod 431 and a driving assembly 432. The piston rod 431 is disposed at an end of the second end in the second chamber 4 and can move along an axis of the second chamber 4. The driving assembly 432 is used to drive the piston rod 431 to move toward the outlet 42. The flow sensing device 44 includes a displacement sensor 44a fixed on the esse rod 431 for detecting a distance L that the piston rod 431 moves toward the outlet 42, then a volume V of the outflow is equal to S-L. The second chamber 4 is similar to a syringe, and the pushing operation is performed through the piston rod 431, which has an advantage of the syringe structure, that is, the piston rod 431 is tightly sealed when moving, and the displacement of the piston rod 431 can indirectly reflect the outflow volume of the solution.

The pushing assembly 43 can also be an ordinary pushing rod, and the flow can be measured through the overflow valve or the weight sensing device. However, on the one hand, it is difficult to mount, on the other hand, it is easily affected by an external factor. In the embodiment, the installation is simple since the piston rod 431 and the displacement sensor 44a corresponding to the piston rod 431 are provided, the piston rod 431 will not move randomly when pressed, and the result can hardly be affected, which provides a higher accuracy.

[0030] It should be noted that the displacement sensor 44a may detect the displacement of the piston rod 431 by using a magnetic attraction structure, a structure outside the second chamber 4 is driven by the piston rod 431 in the second chamber 4 to synchronously move, such that the displacement sensor 44a can detect the structure outside the second chamber 4, that is, the displacement of the piston rod 431 can be obtained. Such structure occupies a small area and is installed easily but affects the accuracy of measurement. The displacement of the piston rod 431 not extending into the second chamber 4 can also be obtained. In this way, the accuracy is affected smaller but the piston rod 431 requires longer and an installation space is bigger. Other ways can be used such as visual induction, magnetic induction, etc. An induction structure can be disposed on the piston rod 431, so that the displacement sensor 44a can sense the displacement of the piston rod in the second chamber. Such structure occupies a small area and the accuracy is high, but it’s hard to maintain when a failure occurs. The above structures have their own advantages and disadvantages, only if it is enough to realize the detection of displacement, which is not limited here, and can be selected according to an actual use situation.

[0031] Specifically, the driving assembly 432 includes an air pump 432a, the air pump 432a communicates with the second end of the second chamber 4, and provides an air pressure to push the piston rod 431 to move. The driving assembly can be a hydraulic rod, à cylinder or an air pump, etc. In the embodiment, the driving assembly is the air pump 432a, and the piston rod is pushed to move by a stable air pressure provided by the air pump 432a. On the one hand, no additional mechanical structure is required for easy installation due to driven by air. On the oo other hand, the stable air pressure can ensure that the piston rod 431 is evenly stressed, which prevents occasions where the piston rod 431 inclines to cause a measurement deviation or even the piston 431 gets stuck. A tight seal of the piston rod 431 needs to be ensured when the piston rod 431 is pushed by the air pressure, so the way of detecting a displacement of a part of the piston rod 431 not extending into the second chamber can not be adopted.

[0032] Further, a rated air pressure P is provided by the air pump 432a, and an intensity of pressure threshold of the overflow valve 421 is Po, then P=Po. When the piston rod 431 is normally driven and controlled by the intensity of pressure threshold of the overflow valve 421, a hydraulic pressure of the piston rod 431 on a side near the solution should be equal to the intensity of pressure threshold of the overflow valve 421, so the piston rod 431 will be driven to push the solution to open the overflow valve 421. When the rated air pressure of the air pump 432a is greater than or equal to the intensity of pressure threshold of the overflow valve 421. If the rated air pressure of the air pump 432a is greater than the intensity of pressure threshold of the overflow valve 421, when the air pump 432a stops working, the air pressure, on a side of the piston rod 431 pushed by the air, may decrease. Even if the air pressure decreases extremely fast, there also exits an occasion where a pressure of one side is greater than the hydraulic pressure on the other side of the piston rod 431, so that the overflow valve 421 cannot be closed in time when the air pump 432a is closed, resulting in too much outflow and inaccurate preparation. Therefore, in the embodiment, the rated air pressure of the air pump 432a is equal to the intensity of pressure threshold of the overflow valve 421. During normal operation, when the air pump 432a is opened, the pressures on both sides of the piston rod 431 are of the same, which is equal to the rated air pressure of the air pump 432a or the intensity of pressure threshold of the overflow valve 421, so the overflow valve 421 is opened. When the outflow reaches a required volume, the air pump 432a stops immediately, and the pressure of the one side pushed by the air immediately becomes lower than the intensity of pressure threshold of the overflow valve 421, so that the overflow valve 421 can be quickly closed to prevent the solution from flowing out due to an inertia in the air pressure reduction after the air pump 432a stops. Therefore, in a pressure linkage between the overflow valve 421 and the air pump 432a, a closing sensitivity of the overflow valve 421 and the accuracy of the solution preparation or dispensation are improved.

[0033] In addition, an elastic structure 45 is provided between the piston rod 431 and an end of the second end in the second chamber 4. The second end of the second chamber 4 is also provided with an exhaust port 46 for releasing a pressure, so that the piston rod 431 can be 09590 driven back to the second end of the second chamber 4 by the the elastic structure 45. The exhaust port 46 is used to discharge an air pumped into the second chamber 4 by the air pump 432a, and the piston rod 431, after pushing the solution to flow out, can be brought back to a side near the air pump 432a by the elastic structure 45, to keep a maximized volume of the solution in the second chamber 4, and easily clean an inner wall of the second chamber 4 placing solution during cleaning, and avoid an occasion where the piston rod 431 can not be brought back. The elastic structure 45 may be a spring or an elastic rubber, etc. In the embodiment, a spring structure is adopted, which has a simple structure, a low price and a strong practicability.

[0034] In addition, the second chambers 4 of the plurality of the first liquid-outlet devices 11 communicate with the same air pump 432a. A plurality of the first liquid-outlet devices 11 are driven by one air pump 432a. On the one hand, a number of the air pump 432a is reduced to reduce a cost. On the other hand, valve bodies can be synchronizingly disposed between the air pump 432a and each of the plurality of the first liquid-outlet devices 11. An air supply direction of the air pump 432a can be controlled to determine a sequence of various solutions being mixed into the first chamber 21, and avoid a wrong reaction or a dangerous reaction due to an improper sequence. The air pump 432a used in the second chamber 4 of the second liquid-outlet device 31 is independent, and a valve body is also provided between the air pump 432a and the second chamber 4. When it needs to dispense a quantitative solution, the valve is opened, so that the air pressure pushes the piston rod 431 to allow the liquid flow out. After reaching a predetermined amount, the valve body is closed to prevent an air leak of an air side of the piston rod 431 in the air pump 432a. A stationary pressure allows the piston rod 431 to remain stationary. The valve body is opened during a next dispensing operation, so that the piston rod 431 can continue to advance in a previous dispensing operation to ensure that a same distance of the piston rod 431 detected by the displacement sensor 44a is equals to an amount of the mixed solution during every dispensing operation, which prevents the piston rod 431 from retreating after a dispensing operation, and avoids an occasion where the mixed solution is less while the displacement sensor 44a detects a same distance during the next dispensing operation.

[0035] In addition, the second chamber 4 is also communicated with a waste tank 5, which can be opened to recycle the solution in the second chamber 4. Most of solutions used in the laboratory can not be directly discharged into the sewer, and a special management and treatment needs to be set up. Therefore, in the embodiment, each second chambers 4 159599 connected to a waste tank 5. The solution in the second chamber 4 is emptied by the waste tank 5 to facilitate a cleaning of the second chamber 4 and a treatment of waste. The waste tank 5 can be movably connected to the second chamber 4 to facilitate taking out the waste tank 5 and operating a treatment, or be fixedly connected to the second chamber 4, with an additional treatment device and a discharge system to process and discharge the waste in the waste tank 5. The former is easy to operate and facilitates a targeted treatment manually, while the latter is automated, both of which can properly treat the waste in the waste tank 5, which is not limited here.

[0036] Further, the waste tank 5 is also provided with a waste outlet 51 for communicating with the sewer. When the mixed solution is evaluated and allowed to be directly discharged, the solution in the second chamber 4 of the second liquid-outlet device 31 can be directly discharged, thus when the solution can not be directly discharged, the waste tank 5 can be cannibalized to perform a treatment. On the other hand, when the solution can be directly discharged, it can be directly flowed to the sewer through the waste tank 5. Both treatment methods required in the two situations can be completed without an additional structure, and the structure is simple and easy to install.

[0037] In addition, the mixing device 22 includes a stirrer 22a. Methods such as pneumatic mixing, magnetic power mixing or mechanical mixing can be used in the mixing device 22. In the embodiment, the mechanical mixing method is used, and the mixing device 22 is directly disposed as the mechanical stirrer 22a. The solutions is stirred by rotation to be mixed. This method has a simple and stable structure, a long service life and an easy maintenance.

[0038] In addition, the outlet 42 of the second chamber 4 in the second liquid-outlet device — 31 is also provided with a flow meter, which is disposed at downstream of the overflow valve 421 for a visual detection of the amount of the outflow, referring a detection of an operation of the solution preparation and dispensation device 100, which facilitate a monitoring to the flow guantity monitoring and a detection of an equipment operation&maintenance.

[0039] In an embodiment, the present disclosure also provides an operation method for the solution preparation and dispensation device 100. The operation method includes a preparation step, a dispensation step and a cleaning step. The preparation step includes: determining a required type and a required volume of each solution, determining a displacement of the displacement sensor 44a in each first liquid-outlet device 11 according to the required volume,

setting an intensity of pressure threshold of the overflow valve 421 according to a rated air pressure of the air pump 432a, guiding each solution into the each first liquid-outlet device LL is to fill the second chamber 4, sealing the second chamber 4 and opening the displacement sensor 44a one by one according to an adding sequence of the solution, connecting the displacement sensor 44a with the air pump 432a. When the displacement sensor 44a detects that the piston rod 431 moves to the predetermined displacement, the valve body on an air path corresponding to the air pump 432a is closed to let a first solution into the first chamber.

The valve body on the air path of the air pump 432a in the second the first liquid-outlet device 11 is opened in sequence. After putting in various solutions, the first chamber 21 is sealed and the stirrer 22a is opened for five minutes to stir for evenly mixing the solution in the first chamber 21.

[0040] Further, the dispensation step includes: determining a volume of each solution for dispensation, setting a displacement of the displacement sensor 44a in the second liquid-outlet device 31 according to the required volume, setting an intensity of pressure threshold of the overflow valve 421 according to the rated air pressure of the air pump 432a, opening a valve body between the first chamber 21 and the second liquid-outlet device 31 to fill the second chamber 4 of the second liquid-outlet device 31 with the evenly mixed solution, sealing the second chamber 4, turning on the displacement sensor 44a, opening the air pump 4323, placing a container when needed, opening the valve body on the air path of the air pump 432a. When the displacement sensor 44a detects that the piston rod 431 moves to the predetermined displacement, the valve body is closed to complete a solution dispensation step, the container is replaced and the valve body on the air path of the air pump 432a is triggered again to continuously dispense until the whole dispensing operation is complete.

[0041] Furthermore, the cleaning step includes: opening each exhaust port 46 of the second chambers 4, so that the piston rod 431 can be pulled back to an initial position by the elastic structure 45, opening each waste tank 5 to collect and discharge the waste from the second chamber 4, closing the waste tank 5, controlling an open/closed of the valve body so that the first chamber 21 communicates with the plurality of the second chambers 4 and forms an integrated chamber, setting the intensity of pressure threshold of the overflow valve 421 of the first liquid-outlet device 11 to 0, choosing one of the first chambers 21 and opening the inlet 41 to fill with clean water, guiding the clean water through the first chamber 21 into the plurality of the second chambers 4, opening the waste tank 5 on the second liquid-outlet device 31 and opening the waste outlet 51, guiding the water from the waste tank 5 into the sewer to clean the solution preparation and dispensation device 100, finally closing all of the valve bodies and

LU503533 the air pumps 432a.

[0042] The above descriptions are only some embodiments of the present disclosure, which are not intended to limit the scope of the present disclosure. Any equivalent structural transformation made by the contents of the description and drawings of the present disclosure under the inventive concept of the present disclosure, or the direct/indirect application applied in other related technical fields are included in the scope of the present disclosure.

Claims

1. À solution preparation and dispensation device, comprising: a preparation assembly comprising a plurality of first liquid-outlet devices, wherein each of the outlet devices is configured to control a quantitative outflow of a solution; a production assembly comprising a first chamber, wherein the first chamber is communicated with outlets of the plurality of first liquid-outlet devices, and a mixing device is provided in the first chamber and configured to mix different solutions from the plurality of first liquid-outlet devices; and a dispensing assembly comprising a second liquid-outlet device, wherein an inlet of the second liquid-outlet device is communicated with the first chamber, and the second liquid-outlet device is configured to control a quantitative outflow of a mixed solution; wherein the first liquid-outlet device and the second liquid-outlet device are both provided with a second chamber, an inlet and an outlet of the second chamber is the inlet and an outlet of the first liquid-outlet device, an overflow valve is provided at the outlet of the second chamber, a pushing assembly is provided in the second chamber and configured to push a guantitative solution to the outlet of the second chamber to open the overflow valve for outflow of the solution.

2. The solution preparation and dispensation device of claim 1, wherein a flow sensing device is configured in the second chamber to detect flow out from the second chamber.

3. The solution preparation and dispensation device of claim 2, wherein the second chamber is cylindrical with a cross-sectional area S, the outlet and the inlet of the chamber are provided on a first end of the second chamber, the pushing assembly comprises: a piston rod provided on an end of a second end of the second chamber and movably along an axis of the second chamber; and a driving assembly for driving the piston rod to move toward the outlet of the second chamber; wherein the flow sensing device comprises a displacement sensor fixed on the piston rod for detecting a distance L that the piston rod moves toward the outlet of the second chamber, a volume V of outflow is equal to S-L. LU503533

4. The solution preparation and dispensation device of claim 3, wherein the driving assembly comprises an air pump for providing an air pressure to push the piston rod to move, and the air pump is communicated with the second end of the second chamber.

5. The solution preparation and dispensation device of claim 4, wherein a rated air pressure P is provided by the air pump, an intensity of pressure threshold of the overflow valve is Po, and P is equal to Po.

6. The solution preparation and dispensation device of claim 4, wherein an elastic structure is connected between the piston rod and the end of the second end of the second chamber; and an exhaust port is provided on the second end of the second chamber for releasing the pressure to make the elastic structure to drive the piston rod back to the end of the second end of the second chamber.

7. The solution preparation and dispensation device of claim 4, wherein the second chambers of the plurality of first outlet devices are all connected to a same air pump.

8. The solution preparation and dispensation device of claim 1, wherein the second chamber is further communicated with a waste tank, the waste tank is configured to recycle a solution of the second chamber when being opened.

9. The solution preparation and dispensation device of claim 8, wherein the waste tank is further provided with a waste outlet for communicating with a sewer.

10. The solution preparation and dispensation device of claim 1, wherein the mixing device comprises a stirrer.