Automatic stock solution diluting device and method

Abstract

The invention provides an automatic stock solution diluting device and method. The device comprises a stock solution container provided with a stock solution outlet; the diluent container is provided with a first liquid inlet connector, a second liquid inlet connector and a liquid outlet connector, a first liquid inlet passage is formed between the second liquid inlet connector and the stock solution outlet, the first liquid inlet connector is connected into the deionized water supply device through a second liquid inlet passage, and a diluent circulation passage is formed between the liquid outlet connector and the second liquid inlet connector; the first electromagnetic valve, the first pump and the second electromagnetic valve are arranged on the first liquid inlet passage, the diluent circulating passage and the first liquid outlet passage at the same time; the third electromagnetic valve and the second pump are arranged on the second liquid inlet passage; the flow divider is arranged in the diluent container, and the liquid inlet end of the flow divider is simultaneously connected into the first liquid inlet connector and the second liquid inlet connector through a three-way connector; and a controller. The method comprises the steps that stock solution in the stock solution container is fed through the first solution inlet channel, deionized water is fed through the second solution inlet channel, diluent in the diluent container is circulated through the diluent circulation channel, and then uniform mixing is achieved. According to the invention, the problem of uniform mixing of the diluent in the existing storage liquid dilution implementation mode can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and more specifically, relates to a device and method for automatically diluting a stock solution. Background Art

[0002] At present, existing medical devices usually use cleaning liquid to clean their actuators that have cleaning requirements, wherein the cleaning liquid used for cleaning is obtained by diluting a high-concentration stock solution to a certain extent with deionized water. Existing stock solution dilution methods mainly include online dilution and storage dilution. Online dilution means that all the dilution liquid produced in each cycle is used for cleaning in that cycle, that is, it is diluted immediately after use. The dilution effect of this dilution method is difficult to control. Storage solution dilution means pre-diluting a certain amount of cleaning liquid, and taking it when the cleaning operation needs to be performed. The dilution effect of this dilution method is easy to control.

[0003] Regarding the dilution of the stored liquid, there are three main ways to achieve it: the first is to drive the stock liquid to mix with deionized water through a metering pump and a syringe; the second is to use high-pressure air or the liquid's own gravity to drive the stock liquid to mix with deionized water; the third is to achieve the mixing of the stock liquid and deionized water through the cooperation of a diaphragm pump and a float. The above three implementation methods all have corresponding shortcomings. Specifically, the metering pump and the syringe are expensive and costly; the gravity drive is unstable and the mixing ratio does not meet the requirements; the high-pressure air has high requirements for the air tightness of the pipeline and the container; the dilution accuracy deviation of the implementation method of the diaphragm pump and the float is large and the dilution amount is fixed; therefore, the above three storage liquid dilution implementation methods cannot meet the complex usage scenarios of the user end. In addition, the above three storage liquid dilution implementation methods all face the problem of mixing after the stock liquid and deionized water are mixed. An existing dilution mixing method is to add a pump and a valve to circulate the dilution repeatedly in the dilution container. This dilution mixing method will cause a large number of bubbles in the dilution. Another way to mix the diluent is to add a mixing mechanism outside the diluent container to vibrate the diluent container to achieve the purpose of mixing the diluent. This diluent mixing method is not only noisy but also requires a relatively large installation space and has many limitations in applicable occasions. Summary of the invention

[0004] The purpose of the present invention is to at least solve the problem of uniform mixing of the diluent in the existing storage liquid dilution implementation method.

[0005] In order to achieve the above object, the present invention provides a device and method for automatically diluting a stock solution.

[0006] According to a first aspect of the present invention, there is provided a device for automatically diluting a stock solution, the device comprising:

[0007] A raw liquid container, used for containing raw liquid, and provided with a raw liquid outlet;

[0008] A diluent container, on which a first liquid inlet joint, a second liquid inlet joint and a liquid outlet joint are provided, a first liquid inlet passage is formed between the second liquid inlet joint and the original liquid outlet, the first liquid inlet joint is connected to an external deionized water supply device through the second liquid inlet passage, and a diluent circulation passage is formed between the liquid outlet joint and the second liquid inlet joint;

[0009] A first external container, wherein the liquid outlet connector is connected to the first external container through a first liquid outlet passage;

[0010] The first solenoid valve, the first pump and the second solenoid valve are all arranged on the first liquid inlet passage, the diluent circulation passage and the first liquid outlet passage;

[0011] A third solenoid valve and a second pump are arranged on the second liquid inlet passage;

[0012] A first weight sensor, used for obtaining the weight of the raw liquid in the raw liquid container;

[0013] A second weight sensor, used for obtaining the weight of the diluent in the diluent container;

[0014] A flow divider is arranged in the diluent container, and the liquid inlet end of the flow divider is connected to the liquid outlet end of the first liquid inlet joint and the liquid outlet end of the second liquid inlet joint through a three-way joint to realize its own suspended arrangement;

[0015] The controller is electrically connected to the first solenoid valve, the first pump, the second solenoid valve, the third solenoid valve, the second pump, the first weight sensor and the second weight sensor.

[0016] Optionally, the stock solution automatic dilution device further includes a second external container and a fourth solenoid valve;

[0017] The second external container is connected to the deionized water supply device through a second liquid outlet passage;

[0018] The third solenoid valve and the fourth solenoid valve are arranged on the second liquid outlet passage.

[0019] Optionally, the NC port of the first solenoid valve is connected to the raw liquid outlet of the raw liquid container, the NO port of the first solenoid valve is connected to the liquid outlet connector of the diluent container, and the COM port of the first solenoid valve is connected to the input end of the first pump;

[0020] The output end of the first pump is connected to the COM port of the second solenoid valve;

[0021] The NC port of the second solenoid valve is connected to the first external container, and the NO port of the second solenoid valve is connected to the second liquid inlet connector of the diluent container.

[0022] Optionally, the stock solution automatic dilution device further comprises a filter and a deionized water connector;

[0023] The COM port of the third solenoid valve is connected to the deionized water supply device through the filter and the deionized water connector in sequence, the NC port of the third solenoid valve is connected to the input end of the second pump, and the NO port of the third solenoid valve is connected to the COM port of the fourth solenoid valve;

[0024] The output end of the second pump is connected to the first liquid inlet connector of the diluent container;

[0025] The NC port of the fourth solenoid valve is connected to the second external container.

[0026] Optionally, the three-way connector is a T-shaped three-way connector;

[0027] The first liquid inlet end of the T-type three-way joint is connected to the liquid outlet end of the first liquid inlet joint of the diluent container, the second liquid inlet end of the T-type three-way joint is connected to the liquid outlet end of the second liquid inlet joint of the diluent container, and the liquid outlet end of the T-type three-way joint is connected to the liquid inlet end of the diverter.

[0028] Optionally, the diverter includes a diverter body, a diverter cover plate, a diverter bottom plate, a microfiltration membrane and a sealing ring;

[0029] The main body of the diverter is a cylindrical structure;

[0030] The diverter cover plate is disposed on the first end of the cylindrical structure and the edge sealing is achieved by the sealing ring, and a protruding liquid inlet end is formed on the diverter cover plate;

[0031] The microfiltration membrane is disposed on the second end of the cylindrical structure;

[0032] A plurality of liquid outlets are evenly arranged on the bottom plate of the diverter. The bottom plate of the diverter is arranged on the second end of the cylindrical structure and is located outside the microfiltration membrane, so as to limit the deformation amount of the microfiltration membrane.

[0033] Optionally, the stock solution automatic dilution device further comprises a first support;

[0034] The first support is used to support the raw liquid container, and the first weight sensor is installed on the first support.

[0035] Optionally, the stock solution automatic dilution device further comprises a second support;

[0036] The second support is used to support the diluent container, and the second weight sensor is installed on the second support.

[0037] According to a second aspect of the present invention, there is provided a method for automatic dilution of a stock solution, the method being implemented based on any of the above-mentioned automatic dilution devices for a stock solution;

[0038] The method for automatic dilution of the stock solution is applied to the controller, comprising the following steps:

[0039] Determine the required amount of stock solution according to the input required amount of dilution solution and dilution ratio;

[0040] The first solenoid valve, the first pump and the second solenoid valve are controlled accordingly, so that the first liquid inlet passage is conducted and the raw liquid in the raw liquid container is fed through the first liquid inlet passage, and the third solenoid valve and the second pump are controlled accordingly, so that the second liquid inlet passage is conducted and the deionized water in the deionized water providing device is fed through the second liquid inlet passage;

[0041] monitoring a change in the weight value sent by the first weight sensor, and stopping the feeding of the stock solution when the change matches the required amount of the stock solution;

[0042] monitoring a change in the weight value sent by the second weight sensor, and stopping the inflow of deionized water when the change matches the required amount of diluent;

[0043] The first solenoid valve, the first pump and the second solenoid valve are controlled accordingly to make the diluent circulation passage conductive and to make the diluent in the diluent container circulate through the diluent circulation passage for a predetermined time.

[0044] Optionally, the start time of the dilution liquid circulation operation is adjusted to after the original liquid is stopped and before the deionized water is stopped, and the dilution liquid circulation operation is stopped after a first time interval has passed since the deionized water is stopped.

[0045] and / or,

[0046] The automatic stock solution dilution method also includes:

[0047] After the diluent circulation operation is stopped, the first solenoid valve, the first pump and the second solenoid valve are controlled accordingly to open the first liquid outlet passage and transfer the diluent in the diluent container to the first external container through the first liquid outlet passage.

[0048] The beneficial effects of the present invention are:

[0049] The automatic dilution device for stock liquid of the present invention forms a first liquid inlet passage between the second liquid inlet joint of the diluent container and the stock liquid outlet of the stock liquid container; the first liquid inlet joint of the diluent container is connected to the deionized water providing device through the second liquid inlet passage; a diluent circulation passage is formed between the liquid outlet joint of the diluent container and the second liquid inlet joint. Under the control of the controller, the stock liquid in the stock liquid container is fed through the first liquid inlet passage, and the deionized water in the deionized water providing device is fed through the second liquid inlet passage. When the stock liquid and deionized water are fed at the same time, the deionized water inputted from the first liquid inlet joint of the diluent container and the stock liquid inputted from the second liquid inlet joint are collided and mixed in the three-way joint, and the mixed dilution is defoamed under the action of the diverter in the process of falling into the dilution container through the diverter.

[0050] Since the demand for stock solution is much smaller than the demand for deionized water during dilution, the time when the stock solution is stopped is earlier than the time when the deionized water is stopped. In this case, the dilution in the dilution container can be circulated through the dilution circulation path after the stock solution is stopped, or the dilution in the dilution container can be circulated through the dilution circulation path after the deionized water is stopped. For the first method mentioned above, the dilution in the dilution container enters the second inlet connector through the outlet connector and the dilution circulation path in turn, and the deionized water input from the first inlet connector of the dilution container and the dilution input from the second inlet connector collide and mix in the three-way connector, and defoaming is achieved in the diverter, and this cycle is repeated to achieve mixing; at the same time, in this process, the dilution flows inside the dilution container, which also accelerates mixing; the end time of the dilution circulation is later than the time when the deionized water stops. For the second method mentioned above, the diluent in the diluent container is circulated back to the diluent container through the liquid outlet joint, the diluent circulation passage, the second liquid inlet joint, the three-way joint and the diverter in sequence, and this cycle is repeated to achieve mixing.

[0051] The use of the automatic dilution device for stock liquid of the present invention can solve the problem of mixing the diluent well. Compared with the mixing method of the prior art in which the diluent is repeatedly circulated in the diluent container, the mixing method realized by the automatic dilution device for stock liquid of the present invention can effectively reduce the generation of bubbles. Compared with the mixing method of the prior art in which a mixing mechanism is added outside the diluent container and the diluent container is vibrated, the present invention utilizes the inherent pump and valve related to the stock liquid inlet, and there is no need to add an additional mixing mechanism or vibrate the diluent container, because there is no problem of noise and usage scenario restrictions.

[0052] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention may be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to represent the same or similar components.

[0054] Figure 1 A schematic structural diagram of a stock solution automatic dilution device according to an embodiment of the present invention is shown;

[0055] Figure 2 An exploded view of a flow divider according to an embodiment of the present invention is shown;

[0056] Figure 3 A flow chart of an implementation of a method for automatic dilution of a stock solution according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to more fully understand the technical solution of the present invention, the exemplary embodiments of the present invention will be described in more comprehensive and detailed in conjunction with the accompanying drawings below. Obviously, the one or more embodiments of the present invention described below are only one or more of the specific ways in which the technical solution of the present invention can be implemented, and are not exhaustive. It should be understood that other ways belonging to a general inventive concept can be used to implement the technical solution of the present invention, and should not be limited by the exemplary embodiments described. Based on one or more embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present invention.

[0058] Example: Figure 1 A schematic structural diagram of a stock solution automatic dilution device according to an embodiment of the present invention is shown.

[0059] Reference Figure 1 The automatic dilution device of the stock solution of the embodiment of the present invention comprises:

[0060] A raw liquid container 1, used for containing raw liquid, and having a raw liquid outlet;

[0061] The diluent container 2 is provided with a first liquid inlet joint 201, a second liquid inlet joint 202 and a liquid outlet joint 203, a first liquid inlet passage is formed between the second liquid inlet joint 202 and the original liquid outlet, the first liquid inlet joint 201 is connected to an external deionized water supply device through the second liquid inlet passage, and a diluent circulation passage is formed between the liquid outlet joint 203 and the second liquid inlet joint 202;

[0062] The first external container 3, the liquid outlet connector 203 is connected to the first external container 3 through the first liquid outlet passage;

[0063] The first solenoid valve 4, the first pump 5 and the second solenoid valve 6 are all arranged on the first liquid inlet passage, the diluent circulation passage and the first liquid outlet passage;

[0064] The third solenoid valve 7 and the second pump 8 are arranged on the second liquid inlet passage;

[0065] A first weight sensor 9 is used to obtain the weight of the raw liquid in the raw liquid container 1;

[0066] The second weight sensor 10 is used to obtain the weight of the diluent in the diluent container 2;

[0067] The flow divider 11 is arranged in the diluent container 2, and the liquid inlet end of the flow divider 11 is simultaneously connected to the liquid outlet end of the first liquid inlet connector 201 and the liquid outlet end of the second liquid inlet connector 202 through the three-way connector 12, so as to realize its own suspended arrangement;

[0068] The controller is electrically connected to the first solenoid valve 4 , the first pump 5 , the second solenoid valve 6 , the third solenoid valve 7 , the second pump 8 , the first weight sensor 9 and the second weight sensor 10 .

[0069] Specifically, in the embodiment of the present invention, the first pump 5 and the second pump 8 are both diaphragm pumps.

[0070] Furthermore, the automatic stock solution dilution device of the embodiment of the present invention further includes a second external container 13 and a fourth solenoid valve 14;

[0071] The second external container 13 is connected to the deionized water supply device through the second liquid outlet passage;

[0072] The third solenoid valve 7 and the fourth solenoid valve 14 are arranged on the second liquid outlet passage.

[0073] Specifically, in the embodiment of the present invention, the deionized water providing device may be a deionized water container or a deionized water making device.

[0074] Furthermore, in the embodiment of the present invention, the NC port of the first solenoid valve 4 is connected to the stock liquid outlet of the stock liquid container 1, the NO port of the first solenoid valve 4 is connected to the liquid outlet connector 203 of the diluent container 2, and the COM port of the first solenoid valve 4 is connected to the input end of the first pump 5;

[0075] The output end of the first pump 5 is connected to the COM port of the second solenoid valve 6;

[0076] The NC port of the second solenoid valve 6 is connected to the first external container 3 , and the NO port of the second solenoid valve 6 is connected to the second liquid inlet connector 202 of the diluent container 2 .

[0077] Furthermore, the automatic stock solution dilution device of the embodiment of the present invention further includes a filter 15 and a deionized water connector 16;

[0078] The COM port of the third solenoid valve 7 is connected to the deionized water supply device through the filter 15 and the deionized water connector 16 in sequence, the NC port of the third solenoid valve 7 is connected to the input end of the second pump 8, and the NO port of the third solenoid valve 7 is connected to the COM port of the fourth solenoid valve 14;

[0079] The output end of the second pump 8 is connected to the first liquid inlet connector 201 of the diluent container 2;

[0080] The NC port of the fourth solenoid valve 14 is connected to the second external container 13 .

[0081] Furthermore, in the embodiment of the present invention, the three-way connector 12 is a T-shaped three-way connector;

[0082] The first liquid inlet end of the T-type three-way connector is connected to the liquid outlet end of the first liquid inlet connector 201 of the diluent container 2, the second liquid inlet end of the T-type three-way connector is connected to the liquid outlet end of the second liquid inlet connector 202 of the diluent container 2, and the liquid outlet end of the T-type three-way connector is connected to the liquid inlet end of the diverter 11.

[0083] Specifically, in the embodiment of the present invention, the liquid outlet end of the first liquid inlet joint 201 of the diluent container 2 and the liquid outlet end of the second liquid inlet joint 202 of the diluent container 2 are both connected to the T-type three-way joint. During the process of liquid inlet of the stock solution and the deionized water, the stock solution and the deionized water collide in the T-type three-way joint. It can be concluded from the pressure change equation and the momentum conservation equation that the fluid is in a laminar state before the collision and becomes turbulent after the collision. When the two fluids collide with each other, pressure waves and eddies will be generated. These phenomena will cause interaction and mixing between the fluids, thereby achieving a mixing effect.

[0084] Further, Figure 2 FIG. 1 shows an exploded view of a flow divider according to an embodiment of the present invention. Figure 2 In the embodiment of the present invention, the diverter 11 includes a diverter body 1101, a diverter cover plate 1102, a diverter bottom plate 1103, a microfiltration membrane 1104 and a sealing ring 1105;

[0085] The main body 1101 of the flow divider is a cylindrical structure;

[0086] The flow divider cover plate 1102 is covered on the first end of the cylindrical structure and the edge is sealed by the sealing ring 1105. A protruding liquid inlet end is formed on the flow divider cover plate 1102;

[0087] The microfiltration membrane 1104 is disposed on the second end of the cylindrical structure;

[0088] A plurality of liquid outlets are evenly arranged on the diverter bottom plate 1103 . The diverter bottom plate 1103 is arranged on the second end of the cylindrical structure and is located outside the microfiltration membrane 1104 , so as to limit the deformation of the microfiltration membrane 1104 .

[0089] Specifically, in the embodiment of the present invention, bubbles are generated during the collision and mixing of the stock solution and the deionized water in the T-type three-way connector, and the function of the diverter 11 is to reduce the bubbles in the dilution solution flowing through it to a corresponding extent.

[0090] The liquid outlet of the T-type three-way connector is connected to the liquid inlet of the diverter 11. After the dilution liquid after collision and mixing in the T-type three-way connector enters the diverter body 1101 through the liquid inlet on the diverter cover 1102, the dilution liquid passes through the microfiltration membrane 1104 under the action of gravity, and the microfiltration membrane 1104 can effectively remove the bubbles generated in the liquid. Since the microfiltration membrane 1104 is relatively thin, the design of the diverter bottom plate 1103 can protect the microfiltration membrane 1104 and prevent the liquid from impacting the microfiltration membrane 1104 and causing it to be damaged. In addition, a plurality of small holes are provided on the diverter bottom plate 1103, and the dilution liquid filtered by the microfiltration membrane 1104 flows smoothly into the dilution liquid container 2 through the plurality of small holes. In the whole system, the sealing ring 1105 ensures a good seal at the connection to prevent liquid leakage. In addition, the diluent flows to the diverter 11 by gravity, and the flow rate is slow. Under the effects of diffusion and dissolution, the bubbles have more time to contact with the fluid, and thus have more opportunities to be dissolved or diffused into the fluid. In the process of the diluent flowing from the diverter 11 to the diluent container 2, due to the small filtration pore size of the microfiltration membrane 1104, the bubbles dissolved in the diluent are further eliminated under the effects of pressure difference, fluid constraint and friction. Among them, the pressure difference refers to the pressure difference generated when the fluid passes through the fine pores, which will cause the gas in the bubble to diffuse outward or escape; the fluid constraint refers to the fact that the fine pores will limit the movement of the bubbles, so that the bubbles cannot float freely in the fluid, thereby increasing the contact area between the bubbles and the fluid, and promoting the diffusion or escape of the gas; the friction refers to the friction in the fine pores that will hinder the movement of the bubbles, making it easier for the gas in the bubbles to diffuse or escape.

[0091] Specifically, in an embodiment of the present invention, the microfiltration membrane 1104 can be attached to the inner end surface of the diverter bottom plate 1103, or it can be set to be parallel to the inner end surface of the diverter bottom plate 1103 and maintain a predetermined distance between the two, which is less than the maximum axial deformation of the microfiltration membrane 1104.

[0092] Furthermore, the automatic stock solution dilution device of the embodiment of the present invention further includes a first support 17;

[0093] The first support 17 is used to support the raw liquid container 1 , and the first weight sensor 9 is installed on the first support 17 .

[0094] Furthermore, the automatic stock solution dilution device of the embodiment of the present invention further includes a second support 18;

[0095] The second support 18 is used to support the diluent container 2 , and the second weight sensor 10 is mounted on the second support 18 .

[0096] Specifically, in the embodiment of the present invention, the first weight sensor 9 actually obtains the total weight of the stock liquid container 1 and the stock liquid therein. The weight of the stock liquid container 1 is preset in the controller. When the controller receives the weight value sent by the first weight sensor 9, the controller performs a tare setting to determine the weight of the stock liquid in the stock liquid container 1. In the process of stock liquid inlet, the controller directly determines the inlet amount of the stock liquid based on the change in the weight value sent by the first weight sensor 9. The second weight sensor 10 actually obtains the total weight of the diluent container 2 and the diluent therein. When the controller receives the weight value sent by the second weight sensor 10, the controller performs a tare setting to determine the weight of the diluent in the diluent container 2. In the process of stock liquid inlet and deionized water inlet, the controller directly determines the preparation amount of the diluent based on the change in the weight value sent by the second weight sensor 10. The ratio of the change in the weight value sent by the first weight sensor 9 to the change in the weight value sent by the second weight sensor 10 is the dilution ratio.

[0097] Specifically, the working process of the automatic dilution device of the stock solution of the embodiment of the present invention is as follows:

[0098] The controller obtains the corresponding initial weight through the second weight sensor 10. When the initial weight does not meet the set weight, the controller calculates the difference between the set weight and the initial weight, and determines the required amount of stock solution according to the difference and the predetermined dilution ratio;

[0099] The controller turns on the first solenoid valve 4 and the first pump 5, and the raw liquid in the raw liquid container 1 is fed into the liquid through the first liquid inlet passage. At the same time, the third solenoid valve 7 and the second pump 8 are turned on, and the deionized water in the deionized water supply device is fed into the liquid through the second liquid inlet passage.

[0100] When the change in the weight value sent by the first weight sensor 9 meets the required amount of the stock liquid, the first solenoid valve 4 and the first pump 5 are closed to stop the inflow of the stock liquid;

[0101] When the change in the weight value sent by the second weight sensor 10 meets the required amount of diluent, the third solenoid valve 7 and the second pump 8 are closed to stop the inflow of deionized water;

[0102] After the original liquid or deionized water is stopped from being fed, the first pump 5 is turned on to circulate the diluent in the diluent container 2 through the diluent circulation passage, thereby mixing the diluent evenly.

[0103] After the diluent is mixed, the first pump 5 is kept turned on, and the second solenoid valve 6 is turned on to change the internal passage of the second solenoid valve 6. At this time, the diluent in the liquid release container 2 is transferred to the first external container 3 through the liquid outlet connector 203, the first solenoid valve 4, the first pump 5 and the second solenoid valve 6;

[0104] In addition, when the amount set by the operator on the deionization equipment exceeds the demand for deionized water, the third solenoid valve 7 and the second pump 8 are closed through the controller, and the fourth solenoid valve 14 is opened, so that the deionization equipment discharges excess deionized water to the second external container 13 through the fourth solenoid valve 14.

[0105] Correspondingly, based on the automatic stock solution dilution device of the embodiment of the present invention, the embodiment of the present invention further proposes an automatic stock solution dilution method.

[0106] Figure 3 The flowchart of the method for automatically diluting the stock solution according to the embodiment of the present invention is shown. Figure 3 The method for automatic dilution of stock solution of the embodiment of the present invention is implemented based on the above-mentioned automatic dilution device of stock solution and is applied to a controller, comprising the following steps:

[0107] Step S100, determining the required amount of stock solution according to the input required amount of diluent and dilution ratio;

[0108] Step S200, the first solenoid valve, the first pump and the second solenoid valve are controlled accordingly, so that the first liquid inlet passage is conducted and the raw liquid in the raw liquid container is fed through the first liquid inlet passage, and the third solenoid valve and the second pump are controlled accordingly, so that the second liquid inlet passage is conducted and the deionized water in the deionized water providing device is fed through the second liquid inlet passage;

[0109] Step S300, monitoring the change in the weight value sent by the first weight sensor, and when the change matches the required amount of stock solution, stopping the feeding of stock solution;

[0110] Step S400, monitoring the change in the weight value sent by the second weight sensor, and when the change matches the required amount of diluent, stopping the inflow of deionized water;

[0111] Step S500: Control the first solenoid valve, the first pump and the second solenoid valve accordingly to connect the diluent circulation path and allow the diluent in the diluent container to circulate through the diluent circulation path for a predetermined time.

[0112] Specifically, in an embodiment of the present invention, the start time of the dilution liquid circulation operation can be adjusted to after the original liquid is stopped and before the deionized water is stopped, and the dilution liquid circulation operation can be stopped after a first time interval has passed since the deionized water is stopped.

[0113] Furthermore, the method for automatically diluting the stock solution of the embodiment of the present invention further includes:

[0114] After the diluent circulation operation is stopped, the first solenoid valve, the first pump and the second solenoid valve are controlled accordingly to open the first liquid outlet passage and transfer the diluent in the diluent container to the first external container through the first liquid outlet passage.

[0115] Specifically, the embodiment of the present invention also proposes another method for automatic dilution of stock solution, and the specific process of the method is as follows:

[0116] S1, receiving the input dilution liquid demand and dilution ratio;

[0117] S2, determining whether there is raw liquid in the raw liquid container based on the first weight sensor, if not, prompting that the raw liquid is insufficient, if yes, proceeding to the next step;

[0118] S3, determining whether the weight of the diluent in the diluent container meets the required amount of the diluent based on the second weight sensor, if yes, the diluent preparation process ends, and the first pump and the second solenoid valve are turned on to transfer the diluent in the diluent container to the first external container, if no, proceed to the next step;

[0119] S4, recording the current weight values ​​of the first weight sensor and the second weight sensor, and determining the required volumes of the stock solution and deionized water according to the required amount of diluent and the dilution ratio;

[0120] S5. Determine the storage method of deionized water, including two storage methods: storing in a container and directly preparing deionized water using a deionized water device;

[0121] S6, open the first solenoid valve and the first pump to start feeding the stock solution, and at the same time open the third solenoid valve and the second pump to start feeding the deionized water;

[0122] S7, determine whether the stock solution is sufficient, if not: stop all dilution actions, prompt to add stock solution, and start the dilution action after the stock solution is added; if yes: proceed to the next step;

[0123] S8, determining whether the change in the weight value of the first weight sensor is equal to the required amount of the stock solution, if not: continue diluting; if yes: close the first solenoid valve and the first pump;

[0124] S9, determining whether the change in the weight value of the second weight sensor is equal to the required amount of diluent, if not: continue to feed deionized water; if yes: close the third solenoid valve and the second pump;

[0125] S10, turning on the first pump to mix the diluent;

[0126] S11, turn off the first pump, and the dilution process ends.

[0127] The embodiment of the present invention provides an automatic dilution device for stock solution, which can reduce costs, automatically mix, eliminate bubbles, have no requirements for dilution amount, have an adjustable dilution ratio, and can trigger the dilution process at any time. Specifically, the beneficial effects of the embodiment of the present invention are as follows:

[0128] 1. The weight sensor is used, so dilution can be done at any time, and there is no specific requirement for the dilution amount;

[0129] 2. The two weight sensors cooperate with each other to greatly improve the dilution accuracy and the dilution ratio is adjustable;

[0130] 3. The use of the splitter avoids bubbles generated by mixing and reduces the impact of bubbles on the instrument;

[0131] 4. The conventional pump and valve are used to greatly save costs and installation space;

[0132] 5. There is no specific requirement for the storage method of deionized water, and the application range is wider.

[0133] Although one or more embodiments of the present invention are described above, it should be known to those skilled in the art that the present invention can be implemented in any other form without departing from its subject matter and scope. Therefore, the embodiments described above are illustrative rather than restrictive, and many modifications and substitutions are obvious to those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A stock solution automatic dilution device, characterized in that: include: A raw liquid container, used for containing raw liquid, and provided with a raw liquid outlet; A diluent container, on which a first liquid inlet joint, a second liquid inlet joint and a liquid outlet joint are provided, a first liquid inlet passage is formed between the second liquid inlet joint and the original liquid outlet, the first liquid inlet joint is connected to an external deionized water supply device through the second liquid inlet passage, and a diluent circulation passage is formed between the liquid outlet joint and the second liquid inlet joint; A first external container, wherein the liquid outlet connector is connected to the first external container through a first liquid outlet passage; The first solenoid valve, the first pump and the second solenoid valve are all arranged on the first liquid inlet passage, the diluent circulation passage and the first liquid outlet passage; A third solenoid valve and a second pump are arranged on the second liquid inlet passage; A first weight sensor, used for obtaining the weight of the raw liquid in the raw liquid container; A second weight sensor, used for obtaining the weight of the diluent in the diluent container; A flow divider is arranged in the diluent container, and the liquid inlet end of the flow divider is connected to the liquid outlet end of the first liquid inlet joint and the liquid outlet end of the second liquid inlet joint through a three-way joint to realize its own suspended arrangement; The controller is electrically connected to the first solenoid valve, the first pump, the second solenoid valve, the third solenoid valve, the second pump, the first weight sensor and the second weight sensor.

2. The automatic stock solution dilution device according to claim 1, characterized in that: Also includes a second external container and a fourth solenoid valve; The second external container is connected to the deionized water supply device through a second liquid outlet passage; The third solenoid valve and the fourth solenoid valve are arranged on the second liquid outlet passage.

3. The automatic stock solution dilution device according to claim 2, characterized in that: The NC port of the first solenoid valve is connected to the raw liquid outlet of the raw liquid container, the NO port of the first solenoid valve is connected to the liquid outlet connector of the diluent container, and the COM port of the first solenoid valve is connected to the input end of the first pump; The output end of the first pump is connected to the COM port of the second solenoid valve; The NC port of the second solenoid valve is connected to the first external container, and the NO port of the second solenoid valve is connected to the second liquid inlet connector of the diluent container.

4. The automatic stock solution dilution device according to claim 3, characterized in that: Also included are filters and deionized water connections; The COM port of the third solenoid valve is connected to the deionized water supply device through the filter and the deionized water connector in sequence, the NC port of the third solenoid valve is connected to the input end of the second pump, and the NO port of the third solenoid valve is connected to the COM port of the fourth solenoid valve; The output end of the second pump is connected to the first liquid inlet connector of the diluent container; The NC port of the fourth solenoid valve is connected to the second external container.

5. The automatic stock solution dilution device according to claim 4, characterized in that: The three-way connector is a T-shaped three-way connector; The first liquid inlet end of the T-type three-way joint is connected to the liquid outlet end of the first liquid inlet joint of the diluent container, the second liquid inlet end of the T-type three-way joint is connected to the liquid outlet end of the second liquid inlet joint of the diluent container, and the liquid outlet end of the T-type three-way joint is connected to the liquid inlet end of the diverter.

6. The automatic stock solution dilution device according to claim 5, characterized in that: The diverter comprises a diverter body, a diverter cover plate, a diverter bottom plate, a microfiltration membrane and a sealing ring; The main body of the diverter is a cylindrical structure; The diverter cover plate is disposed on the first end of the cylindrical structure and the edge sealing is achieved by the sealing ring, and a protruding liquid inlet end is formed on the diverter cover plate; The microfiltration membrane is disposed on the second end of the cylindrical structure; A plurality of liquid outlets are evenly arranged on the bottom plate of the diverter. The bottom plate of the diverter is arranged on the second end of the cylindrical structure and is located outside the microfiltration membrane, so as to limit the deformation amount of the microfiltration membrane.

7. The automatic stock solution dilution device according to claim 6, characterized in that: Also included is a first support; The first support is used to support the raw liquid container, and the first weight sensor is installed on the first support.

8. The automatic stock solution dilution device according to claim 7, characterized in that: Also included is a second support; The second support is used to support the diluent container, and the second weight sensor is installed on the second support.

9. A method for automatic dilution of a stock solution, characterized in that: It is realized based on the automatic dilution device of stock solution according to any one of claims 1 to 8; The method for automatic dilution of stock solution is applied to the controller, comprising: Determine the required amount of stock solution according to the input required amount of dilution solution and dilution ratio; The first solenoid valve, the first pump and the second solenoid valve are controlled accordingly, so that the first liquid inlet passage is conducted and the raw liquid in the raw liquid container is fed through the first liquid inlet passage, and the third solenoid valve and the second pump are controlled accordingly, so that the second liquid inlet passage is conducted and the deionized water in the deionized water providing device is fed through the second liquid inlet passage; monitoring a change in the weight value sent by the first weight sensor, and stopping the feeding of the stock solution when the change matches the required amount of the stock solution; monitoring a change in the weight value sent by the second weight sensor, and stopping the inflow of deionized water when the change matches the required amount of diluent; The first solenoid valve, the first pump and the second solenoid valve are controlled accordingly to make the diluent circulation passage open and to make the diluent in the diluent container circulate through the diluent circulation passage for a predetermined time.

10. The method for automatic dilution of stock solution according to claim 9, characterized in that: The start time of the dilution liquid circulation operation is adjusted to after the original liquid is stopped and before the deionized water is stopped, and the dilution liquid circulation operation is stopped after a first time interval has passed since the deionized water is stopped; and / or, The automatic stock solution dilution method also includes: After the diluent circulation operation is stopped, the first solenoid valve, the first pump and the second solenoid valve are controlled accordingly to open the first liquid outlet passage and transfer the diluent in the diluent container to the first external container through the first liquid outlet passage.

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