Automatic dispensing device and control method

Abstract

The application provides an automatic dispensing device and a control method, and relates to the technical field of dispensing. The device comprises a controller and a flow cell module. The flow cell module has at least one flow channel, and each flow channel is matched with a set of configuration components. Each set of configuration components comprises a dispensing bottle, a collection bottle, and a liquid inlet conductivity probe, a liquid outlet conductivity probe and a liquid outlet valve body which are electrically connected to the controller. The liquid outlet valve body is arranged in the corresponding flow channel. The controller is used to adjust the working position of the liquid outlet valve body according to the liquid inlet conductivity signal and the liquid outlet conductivity signal. The flow state of the flow channel can be changed or the flow channel can be switched to different collection bottles, so as to accurately realize the dispensing function after solvent extraction, avoid the inaccuracy of the existing automatic dispensing caused by the position of the needle, and make the automatic dispensing device of the application widely applicable, capable of replacing manual dispensing, simplifying the operation process and improving the work efficiency.

Description

Technical Field

[0001] This application relates to the field of liquid separation technology, and more specifically, to an automatic liquid separation device and control method. Background Technology

[0002] Solvent extraction is an important unit operation in chemical engineering, utilizing the difference in the partition properties of a solution between two immiscible liquid phases to separate liquid mixtures. In laboratories, spherical and pear-shaped separatory funnels are commonly used for manual separation. However, manual separation is prone to incomplete separation due to the inability to accurately determine the phase interface or untimely stopcock control. Therefore, automated separation devices have been developed in the industry.

[0003] The existing automated liquid separation device operates on the following principle: after extraction, the sample vial is allowed to stand until the liquids separate into layers. By controlling the position of the syringe needle at the liquid level, the upper or lower layer of liquid is extracted for analysis. However, since the separation depends entirely on the position of the syringe needle at the liquid level, inaccurate extraction can easily lead to impurities in the separated liquid. Summary of the Invention

[0004] The purpose of this application is to address the shortcomings of the prior art by providing an automatic liquid separation device and control method that can accurately achieve the liquid separation function after solvent extraction, has wide applicability, can replace manual liquid separation, simplifies the operation process, and improves work efficiency.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] One aspect of this application provides an automatic liquid dispensing device, including a controller and a flow cell module. The flow cell module has at least one flow channel, and a set of configuration components are matched to each flow channel. Each set of configuration components includes a dispensing bottle connected to the inlet of the corresponding flow channel, a collection bottle connected to the outlet of the corresponding flow channel, and an inlet conductivity probe, an outlet conductivity probe, and an outlet valve body, all electrically connected to the controller. The inlet conductivity probe is used to collect the inlet conductivity signal at the inlet of the corresponding flow channel, and the outlet conductivity probe is used to collect the outlet conductivity signal at the outlet of the corresponding flow channel. The outlet valve body is disposed in the corresponding flow channel, and the controller is used to adjust the working position of the outlet valve body according to the inlet conductivity signal and the outlet conductivity signal.

[0007] Optionally, each set of configuration components also includes an inlet temperature probe and an outlet temperature probe, which are electrically connected to the controller. The inlet temperature probe and the outlet temperature probe are used to collect the inlet temperature signal at the inlet of the corresponding flow channel and the outlet temperature signal at the outlet of the corresponding flow channel, respectively. The controller is also used to convert the inlet conductivity signal and the outlet conductivity signal based on the inlet temperature signal and the outlet temperature signal, so as to adjust the working position of the outlet valve body accordingly.

[0008] Optionally, the controller is electrically connected to the inlet temperature probe, outlet temperature probe, inlet conductivity probe and outlet conductivity probe in each configuration component via a flow channel selection circuit.

[0009] Optionally, each set of configuration components includes multiple collection bottles corresponding to the amount of stratified liquid in the dispensing bottle. The multiple collection bottles are connected to the outlet of the corresponding flow channel through the liquid outlet valve body, so that under the control of the controller, the stratified liquid flows into different collection bottles respectively.

[0010] Optionally, the liquid outlet valve body is located at the outlet of the corresponding flow channel, and each configuration component also includes a liquid inlet valve body located at the inlet of the corresponding flow channel. The liquid inlet valve body is electrically connected to the controller and is used to control the on / off state of the flow channel inlet.

[0011] Optionally, the automatic dispensing device also includes a touch screen for electrical connection with the controller.

[0012] Optionally, the automatic dispensing device also includes a communication module for electrical connection with the controller.

[0013] Another aspect of this application provides an automatic liquid dispensing control method, the method comprising: identifying a liquid dispensing command, the liquid dispensing command including at least flow channel information of a flow cell module; acquiring, based on the identified flow channel information, inlet liquid conductivity signals and outlet liquid conductivity signals of the corresponding flow channel inlet and outlet respectively; and adjusting the working position of the outlet valve body in the corresponding flow channel based on the difference between the inlet liquid conductivity signal and the outlet liquid conductivity signal.

[0014] Optionally, adjusting the working position of the outlet valve body in the corresponding flow channel based on the difference between the inlet conductivity signal and the outlet conductivity signal includes: first converting the inlet conductivity signal and the outlet conductivity signal into inlet conductivity signals and outlet conductivity signals at standard temperature; and then adjusting the working position of the outlet valve body in the corresponding flow channel based on the difference between the inlet conductivity signal and the outlet conductivity signal at standard temperature.

[0015] Optionally, adjusting the working position of the outlet valve body in the corresponding flow channel based on the difference between the inlet conductivity signal and the outlet conductivity signal includes: if the difference between the inlet conductivity signal and the outlet conductivity signal returns from outside the preset range to within the preset range, then the working position of the outlet valve body is switched so that the different collection bottles in the configuration component are connected to the outlet of the corresponding flow channel respectively.

[0016] The beneficial effects of this application include:

[0017] This application provides an automatic liquid separation device and control method. The device includes a controller and a flow cell module. The flow cell module has at least one flow channel, and a set of configuration components are matched to each flow channel. Each set of configuration components includes a separation bottle connected to the inlet of the corresponding flow channel, a collection bottle connected to the outlet of the corresponding flow channel, and an inlet conductivity probe, an outlet conductivity probe, and an outlet valve body electrically connected to the controller. The inlet conductivity probe is used to collect the inlet conductivity signal at the inlet of the corresponding flow channel, and the outlet conductivity probe is used to collect the outlet conductivity signal at the outlet of the corresponding flow channel. The outlet valve body is disposed in the corresponding flow channel, and the controller is used to adjust the working position of the outlet valve body according to the inlet conductivity signal and the outlet conductivity signal. This allows for precise liquid separation after solvent extraction by changing the flow state of the flow channel or switching the flow channel to different collection bottles, avoiding the inaccurate liquid separation problem caused by the position of the needle in existing automatic liquid separation devices. This makes the automatic liquid separation device of this application widely applicable, capable of replacing manual liquid separation, simplifying the operation process, and improving work efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the structural schematic diagrams of an automatic liquid dispensing device provided in an embodiment of this application;

[0020] Figure 2 This is a second schematic diagram of an automatic liquid dispensing device provided in an embodiment of this application;

[0021] Figure 3 This is the third schematic diagram of an automatic liquid dispensing device provided in the embodiments of this application;

[0022] Figure 4 This is the fourth schematic diagram of an automatic liquid dispensing device provided in the embodiments of this application;

[0023] Figure 5 This is one of the schematic diagrams of the liquid separation process of an automatic liquid separation device provided in the embodiments of this application;

[0024] Figure 6 This is a second schematic diagram of the liquid separation process of an automatic liquid separation device provided in an embodiment of this application;

[0025] Figure 7 This is a schematic flowchart of an automatic liquid separation control method provided in an embodiment of this application.

[0026] Icons: 100-Controller; 101-Touchscreen; 102-Communication Interface; 104-Excitation Source Setting and Selection Circuit; 105-AD Conversion Circuit; 106-Excitation Source Circuit; 107-Conductivity Acquisition Circuit; 108-Temperature Acquisition Circuit; 109-Flow Channel Selection Circuit; 110-Drive Circuit; 111-Inlet Conductivity Probe; 112-Inlet Temperature Probe; 113-Outlet Conductivity Probe; 114-Outlet Temperature Probe; 115-Inlet Valve Body; 116-Outlet Valve Body; 200-Flow Cell Module; 201-Sealing Cap; 202-Conductivity Negative Electrode; 300-Dispensing Bottle; 400-Collection Bottle; 500-Pipeline; 600-Configuration Component. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and therefore should not be construed as limiting this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] One aspect of this application provides an automatic liquid dispensing device, such as... Figure 1As shown, the device includes a controller 100, a flow cell module 200, and configuration components 600. The flow cell module 200 has at least one flow channel, which is a channel for liquid flow. Each flow channel is matched with a set of configuration components 600. Thus, when the automatic liquid dispensing device has only one flow channel, it is matched with a set of configuration components 600, which can perform liquid dispensing operation on one dispensing bottle 300 at the same time. When the automatic liquid dispensing device has two or more flow channels, it is matched with two or more sets of configuration components 600, which can perform liquid dispensing operation on two or more dispensing bottles 300 at the same time, thereby improving the efficiency of liquid dispensing.

[0031] Each configuration group of 600 components corresponds to one flow channel, and these channels are not interconnected. Figure 1 and Figure 2 As shown, each set of configuration components 600 includes a dispensing bottle 300, a collection bottle 400, an inlet conductivity probe 111, an outlet conductivity probe 113, and an outlet valve body 116, all corresponding to the same flow channel. The dispensing bottle 300 is connected to the inlet of the corresponding flow channel, the collection bottle 400 is connected to the outlet of the corresponding flow channel, the inlet conductivity probe 111 can be located at the inlet of the corresponding flow channel to facilitate the acquisition of the inlet conductivity signal at the inlet of the flow channel, the outlet conductivity probe 113 can be located at the outlet of the corresponding flow channel to facilitate the acquisition of the outlet conductivity signal at the inlet of the flow channel, and the outlet valve body 116 is located at the outlet of the corresponding flow channel.

[0032] like Figure 2 As shown, the inlet conductivity probe 111, outlet conductivity probe 113, and outlet valve body 116 in each configuration component 600 are respectively connected to the controller 100 ( Figure 2 The controller 100 (not shown) is electrically connected. Since different liquids have different electrical conductivities, after the controller 100 obtains the inlet and outlet electrical conductivity signals of the liquid flowing at the inlet and outlet of the flow channel through the inlet electrical conductivity probe 111 and the outlet electrical conductivity probe 113, it can compare the difference between the inlet and outlet electrical conductivity signals to identify in real time whether the liquid flowing in the current flow channel is the same liquid. Based on this, it can accurately identify the timing of different layered liquids entering the flow channel, thereby adjusting the working position of the outlet valve 116 in a timely manner. This allows for precise liquid separation after solvent extraction by changing the flow state of the flow channel or switching the flow channel to different collection bottles 400. This avoids the problem of inaccurate liquid separation caused by the position of the needle in existing automatic liquid separation devices. This makes the automatic liquid separation device of this application widely applicable, able to replace manual liquid separation, simplify the operation process, and improve work efficiency.

[0033] It should be understood that, in this application, adjusting the working position of the outlet valve body 116 via the controller 100 means that the controller 100 can drive the outlet valve body 116 to operate, thereby changing the flow channel's on / off state or flow direction. For example, when the layered liquid in the flow channel changes from one type to another, the outlet valve body 116 can be controlled to switch the flow channel's outlet from a flowing state to a closed state, thus accurately separating the two layered liquids. Another example: when the layered liquid in the flow channel changes from one type to another, the outlet valve body 116 can be controlled to switch the flow channel's connection with one collection bottle 400 to a connection with another collection bottle 400, allowing different layered liquids to flow into different collection bottles 400, thus accurately separating multiple layered liquids.

[0034] like Figure 1 As shown, the separatory bottle 300 and the collection bottle 400 can be connected to the flow cell module 200 via the pipeline 500.

[0035] Optionally, to further improve the accuracy of liquid separation, the inlet and outlet conductivity signals can be compared under the same standard, such as at a standard temperature. This can further improve the accuracy of liquid identification by the automatic liquid separation device.

[0036] Specifically: such as Figure 2 As shown, each configuration component 600 also includes an inlet temperature probe 112 and an outlet temperature probe 114. The inlet temperature probe 112 and the outlet temperature probe 114 are electrically connected to the controller 100. The inlet temperature probe 112 can be located at the inlet of the flow channel to facilitate the acquisition of the inlet temperature signal at the inlet of the flow channel, and the outlet temperature probe 114 can be located at the outlet of the flow channel to facilitate the acquisition of the outlet temperature signal at the outlet of the flow channel.

[0037] During data acquisition, the sampling periods of the inlet temperature probe 112, outlet temperature probe 114, inlet conductivity probe 111, and outlet conductivity probe 113 can be made the same. This allows the inlet temperature signal at the same sampling node to be matched with the inlet conductivity signal, representing the inlet conductivity signal of the stratified liquid at the flow channel inlet under the current sampling node and the inlet temperature signal. Then, based on the difference between the inlet temperature signal at the current node and the standard temperature, the inlet conductivity signal at the current sampling node is converted to the inlet conductivity signal at the standard temperature. Similarly, the conversion between the outlet temperature signal and the outlet conductivity signal under the same sampling node can also be completed.

[0038] Therefore, after conversion, the inlet conductivity signal and the outlet conductivity signal at the same sampling node under the standard temperature can be obtained. By comparing them under a unified standard, it is possible to more accurately determine whether the stratified liquids at the inlet and outlet of the flow channel are the same liquid. This improves the accuracy of the controller 100 in adjusting the timing of the outlet valve 116, and accurately realizes the separation function after solvent extraction.

[0039] Optional, such as Figure 2 As shown, the flow cell module 200 may include a flow cell body with a flow channel and a sealing cap 201. The flow channel on the flow cell body has openings at opposite ends. There are two sealing caps 201, which are respectively sealed at opposite openings of the flow cell body. At the same time, an inlet and an outlet are respectively provided on the side wall of the flow cell module 200, serving as the inlet and outlet of the flow channel. The inlet conductivity probe 111 and the inlet temperature probe 112 can be jointly disposed on the sealing cap 201 near the inlet and extend into the flow channel. The outlet conductivity probe 113 and the outlet temperature probe 114 can be jointly disposed on the sealing cap 201 near the outlet and extend into the flow channel. In order to form a conductivity acquisition function, the side wall of the flow cell body can be used as a negative electrode 202. In this way, the inlet conductivity probe 111 and the outlet conductivity probe 113 form a detection circuit with the negative electrode 202 through the liquid in the flow channel.

[0040] Optionally, the flow cell module 200 can have multiple flow channels, such as two or more. Thus, the configuration components 600 are also multiple sets corresponding to each other. In order to accurately control different configuration components 600 to achieve dispensing of different dispensing bottles 300, a flow channel selection circuit 109 can be added. That is, before the controller 100 performs control, the configuration component 600 and the flow channel to be controlled are determined first, and then the corresponding control is performed.

[0041] Taking two flow channels and two sets of configuration components 600 as an example: Figure 4 As shown, the flow cell module 200 includes two flow channels, one on the left and one on the right, distributed within the flow cell module 200. Each of the two flow channels is equipped with a set of configuration components 600, and the two sets of configuration components 600 are identical. Therefore, when the automatic liquid dispensing device dispenses liquid from a dispensing bottle 300, it can select either the left flow channel and the left configuration component 600, or the right flow channel and the right configuration component 600. When dispensing liquid from two dispensing bottles 300, the left flow channel and the left configuration component 600 can dispense from one bottle, and the right flow channel and the right configuration component 600 can dispense from the other. Dispensing from both sides can be performed simultaneously or not simultaneously; this application does not impose any restrictions on this, meaning that during control, the dispensing from both sides can be controlled independently.

[0042] To improve the accuracy of control, such as Figure 3 As shown, a flow channel selection circuit 109 can be added between the controller 100 and the configuration component 600. That is, when the controller 100 is powered on and receives signals, the flow channel selection circuit 109 can be used to select the corresponding configuration component 600, and then control the inlet temperature probe 112, outlet temperature probe 114, inlet conductivity probe 111 and outlet conductivity probe 113 in the configuration component 600 that needs to be controlled. This allows the control of each configuration component 600 to be independent of each other, and to perform the liquid separation function simultaneously or not at the same time.

[0043] Optional, such as Figure 1 , Figure 2 and Figure 4 As shown, each configuration component 600 includes multiple collection bottles 400. The number of collection bottles 400 can correspond one-to-one with the number of stratified liquids in the dispensing bottle 300 in the configuration component 600. Thus, when multiple collection bottles 400 are connected to the outlet of the corresponding flow channel through the liquid outlet valve body 116, the working position of the liquid outlet valve body 116 can be adjusted in time under the control of the controller 100, so that different stratified liquids flow into different collection bottles 400 respectively. That is, one type of stratified liquid flows into one collection bottle 400, realizing the liquid separation function.

[0044] Specifically: such as Figure 1 , Figure 2 and Figure 4 As shown, each configuration component 600 includes two collection bottles 400 and a separating bottle 300 containing two types of layered liquids. After separation begins, the first type of layered liquid begins to flow into one of the two collection bottles 400 through the inlet and outlet of the flow channel. When the inlet and outlet of the flow channel are identified as the same liquid and that liquid is the first type of layered liquid, the outlet valve 116 does not operate. When the inlet and outlet of the flow channel are identified as not being the same liquid, it means that the second type of layered liquid has flowed in through the inlet, but the first type of layered liquid has not yet completely flowed out through the outlet, so the outlet valve 116 does not operate. When the inlet and outlet of the flow channel are identified as the same liquid and that liquid is the second type of layered liquid, the outlet valve 116 operates, connecting the outlet of the flow channel to the other collection bottle 400, so that the second type of layered liquid flows into the other collection bottle 400, thus completing the separation of the two types of layered liquids.

[0045] When the controller 100 is electrically connected to the valve body and probe in each configuration component 600, such as Figure 3As shown, the controller 100 can be electrically connected to the inlet conductivity probe 111, outlet conductivity probe 113, inlet temperature probe 112, and outlet temperature probe 114 in each configuration component 600 via the excitation circuit and the flow channel selection circuit 109. The inlet conductivity probe 111, outlet conductivity probe 113, inlet temperature probe 112, and outlet temperature probe 114 in each configuration component 600 can be electrically connected to the controller 100 via the flow channel selection circuit 109 and the feedback circuit.

[0046] like Figure 3 As shown, the excitation circuit includes an excitation source setting selection circuit 104 and an excitation source circuit 106. The controller 100 can be electrically connected to the inlet conductivity probe 111, outlet conductivity probe 113, inlet temperature probe 112 and outlet temperature probe 114 in each configuration component 600 via the excitation source setting selection circuit 104, the excitation source circuit 106 and the flow channel selection circuit 109.

[0047] like Figure 3 As shown, the feedback circuit includes a conductivity acquisition circuit 107, a temperature acquisition circuit 108, and an AD conversion circuit 105. Among them, the excitation source setting selection circuit 104 and the excitation source circuit 106 are included. The inlet conductivity probe 111 and the outlet conductivity probe 113 in each configuration component 600 can be electrically connected to the controller 100 through the flow channel selection circuit 109, the conductivity acquisition circuit 107, and the AD conversion circuit 105. Similarly, the inlet temperature probe 112 and the outlet temperature probe 114 can be electrically connected to the controller 100 through the flow channel selection circuit 109, the temperature acquisition circuit 108, and the AD conversion circuit 105.

[0048] In addition, the controller 100 can also be electrically connected to the outlet valve body 116 and the inlet valve body 115 in each configuration component 600 via the drive circuit 110.

[0049] Optional, such as Figure 2 and Figure 4 As shown, the outlet valve body 116 is located at the outlet of the corresponding flow channel. Each configuration component 600 also includes an inlet valve body 115 located at the inlet of the corresponding flow channel. The inlet valve body 115 is electrically connected to the controller 100 and is used to control the on / off state of the flow channel inlet. That is, when the corresponding flow channel is not performing a liquid separation task, the controller 100 can control the inlet valve body 115 of the flow channel to close the flow channel inlet. When the corresponding flow channel is performing a liquid separation task, the controller 100 can control the inlet valve body 115 of the flow channel to open the flow channel inlet, so that the stratified liquid in the separating bottle 300 can flow into the flow channel.

[0050] like Figure 1 , Figure 2 and Figure 4As shown, each set of configuration components 600 includes two collection bottles 400, an inlet valve body 115 which is a two-position two-way solenoid valve, an outlet valve body 116 which is a two-position three-way solenoid valve, a dispensing bottle 300 which is connected to the inlet of the flow channel via a two-position two-way solenoid valve, and two collection bottles 400 which are connected to the outlet of the flow channel via a two-position three-way solenoid valve.

[0051] Combination Figure 5 and Figure 6 It is known that the automatic liquid separation device is not activated in the initial position. The two-position two-way solenoid valve closes the inlet of the flow channel, and the two-position three-way solenoid valve is in the normally open (NO) position. After the liquid in the separation bottle 300 settles and separates, the controller 100 recognizes the liquid separation command. Based on the liquid separation command, it can determine the liquid separation flow channel and the corresponding configuration component 600, and also determine the amplitude and frequency of the excitation source of the inlet conductivity probe 111 and the outlet conductivity probe 113. Then, it controls the inlet conductivity probe 111 and the outlet conductivity probe 113 to perform inlet and outlet conductivity detection in real time. At this time, the conductivity of air is detected. It controls the inlet temperature probe 112 and the outlet temperature probe 114 to perform inlet and outlet temperature detection in real time, and converts the inlet conductivity signal and the outlet conductivity signal to the conductivity at the standard temperature. Then, it performs conductivity temperature compensation calculation and conductivity difference calculation at the standard temperature in real time.

[0052] Then combine Figure 2 and Figure 4 It can be seen that when the two-position two-way solenoid valve is opened and the two-position three-way solenoid valve is kept in the normally open NO position, the first type of stratified liquid in the separatory bottle 300 flows into a collection bottle 400 through the flow channel and the normally open NO position of the two-position three-way solenoid valve.

[0053] When the same liquid flows through the inlet and outlet of the flow channel, the absolute value of the difference between the inlet and outlet conductivity signals tends to 0. However, in practice, there will be some fluctuation. Therefore, when the fluctuation is within the same solution medium fluctuation range (which can be preset), it is considered to be the same liquid. At this time, the status quo is maintained, allowing the first layered liquid to flow smoothly into a collection bottle 400.

[0054] When the inlet and outlet of the flow channel are not the same liquid, if the absolute value of the difference between the conductivity signals of the inlet and outlet liquids (which depends on the difference in conductivity values ​​of the two solutions under the same conditions; the greater the difference, the more accurate the separation) exceeds the fluctuation range of the same solution medium (which can be preset), that is, outside the fluctuation range of the same solution medium, then it is considered that the inlet and outlet of the flow channel are not the same liquid. That is, the second type of layered liquid enters the inlet of the flow channel, but the first type of layered liquid has not completely flowed out of the flow channel. The status quo is maintained, so that the first type of layered liquid completely flows into a collection bottle 400.

[0055] When the liquid flowing through the inlet and outlet of the flow channel is the same liquid again, the absolute value of the difference between the inlet and outlet conductivity signals tends to 0 again. However, in practice, there will be some fluctuation. Therefore, when the fluctuation is within the same solution medium fluctuation range (which can be preset), it is considered to be the same liquid. At this time, the two-position two-way solenoid valve is kept open, and the two-position three-way solenoid valve switches its working position and is in the normally closed NC position, so that the second type of stratified liquid flows smoothly into another collection bottle 400.

[0056] When the conductivity probes 111 and 113 both collect data representing air, a delay is made to allow the liquid in the flow channel to flow out completely. At this point, the two-position two-way solenoid valve is closed, and the liquid separation ends.

[0057] Optional, such as Figure 3 As shown, the automatic dispensing device also includes a touch screen 101, which is electrically connected to the controller 100, so that dispensing commands can be input by the user through the touch screen 101.

[0058] Optionally, the automatic dispensing device also includes a communication module for electrical connection with the controller 100. This allows dispensing commands to be sent by the user via a remote terminal, received by the communication module of the automatic dispensing device, and recognized by the controller 100. For example... Figure 3 As shown, the communication module can be the communication interface 102, so that the terminal can be connected to the communication interface 102 via a data cable. Of course, in other embodiments, the communication module can also be a WIFI module, Bluetooth module, etc., and the terminal can communicate with the automatic dispensing device wirelessly.

[0059] Another aspect of this application provides an automatic liquid dispensing control method, which can be used to control the aforementioned automatic liquid dispensing device, such as... Figure 7 As shown, the method includes:

[0060] S010: Identify the liquid dispensing command, which includes at least the flow channel information of the flow cell module 200.

[0061] S020: Based on the identified flow channel information, obtain the inlet and outlet conductivity signals of the corresponding flow channel inlet and outlet, respectively.

[0062] S030: Adjust the working position of the outlet valve body 116 in the corresponding flow channel according to the difference between the inlet conductivity signal and the outlet conductivity signal.

[0063] Combination Figure 5 and Figure 6It can be seen that when the liquid in the separating bottle 300 settles and separates into layers, the controller 100 recognizes the separating command. According to the separating command, on the one hand, it can include flow channel information, thereby determining the separating flow channel and the corresponding configuration component 600. On the other hand, it can include the amplitude and frequency of the excitation source of the inlet conductivity probe 111 and the outlet conductivity probe 113. Then, it controls the inlet conductivity probe 111 and the outlet conductivity probe 113 to perform inlet and outlet conductivity detection in real time. At this time, the conductivity of air is detected. It controls the inlet temperature probe 112 and the outlet temperature probe 114 to perform inlet and outlet temperature detection in real time, and converts the inlet conductivity signal and the outlet conductivity signal to the conductivity at the standard temperature. Then, it completes the conductivity temperature compensation calculation and the conductivity difference calculation at the standard temperature in real time.

[0064] Then combine Figure 2 and Figure 4 It can be seen that when the two-position two-way solenoid valve is opened and the two-position three-way solenoid valve is kept in the normally open NO position, the first type of stratified liquid in the separatory bottle 300 flows into a collection bottle 400 through the flow channel and the normally open NO position of the two-position three-way solenoid valve.

[0065] When the same liquid flows through the inlet and outlet of the flow channel, the absolute value of the difference between the inlet and outlet conductivity signals tends to 0. However, in practice, there will be some fluctuation. Therefore, when the fluctuation is within the same solution medium fluctuation range (which can be preset), it is considered to be the same liquid. At this time, the status quo is maintained, allowing the first layered liquid to flow smoothly into a collection bottle 400.

[0066] When the inlet and outlet of the flow channel are not the same liquid, if the absolute value of the difference between the conductivity signals of the inlet and outlet liquids (which depends on the difference in conductivity values ​​of the two solutions under the same conditions; the greater the difference, the more accurate the separation) exceeds the fluctuation range of the same solution medium (which can be preset), that is, outside the fluctuation range of the same solution medium, then it is considered that the inlet and outlet of the flow channel are not the same liquid. That is, the second type of layered liquid enters the inlet of the flow channel, but the first type of layered liquid has not completely flowed out of the flow channel. The status quo is maintained, so that the first type of layered liquid completely flows into a collection bottle 400.

[0067] When the liquid flowing through the inlet and outlet of the flow channel is the same liquid again, the absolute value of the difference between the inlet and outlet conductivity signals tends to 0 again. However, in practice, there will be some fluctuation. Therefore, when the fluctuation is within the same solution medium fluctuation range (which can be preset), it is considered to be the same liquid. At this time, the two-position two-way solenoid valve is kept open, and the two-position three-way solenoid valve switches its working position and is in the normally closed NC position, so that the second type of stratified liquid flows smoothly into another collection bottle 400.

[0068] When the conductivity probes 111 and 113 both collect data representing air, a delay is made to allow the liquid in the flow channel to flow out completely. At this point, the two-position two-way solenoid valve is closed, and the liquid separation ends.

[0069] Optionally, to further improve the accuracy of liquid separation, the inlet conductivity signal and the outlet conductivity signal can be compared under the same standard. When adjusting the working position of the outlet valve body 116 in the corresponding flow channel according to the difference between the inlet conductivity signal and the outlet conductivity signal, S030 first converts the inlet conductivity signal and the outlet conductivity signal into inlet conductivity signal and outlet conductivity signal at the standard temperature; and adjusts the working position of the outlet valve body 116 in the corresponding flow channel according to the difference between the inlet conductivity signal and the outlet conductivity signal at the standard temperature.

[0070] Specifically: such as Figure 2 As shown, each configuration component 600 also includes an inlet temperature probe 112 and an outlet temperature probe 114. The inlet temperature probe 112 and the outlet temperature probe 114 are electrically connected to the controller 100. The inlet temperature probe 112 can be located at the inlet of the flow channel to facilitate the acquisition of the inlet temperature signal at the inlet of the flow channel, and the outlet temperature probe 114 can be located at the outlet of the flow channel to facilitate the acquisition of the outlet temperature signal at the outlet of the flow channel.

[0071] During data acquisition, the sampling periods of the inlet temperature probe 112, outlet temperature probe 114, inlet conductivity probe 111, and outlet conductivity probe 113 can be made the same. This allows the inlet temperature signal at the same sampling node to be matched with the inlet conductivity signal, representing the inlet conductivity signal of the stratified liquid at the flow channel inlet under the current sampling node and the inlet temperature signal. Then, based on the difference between the inlet temperature signal at the current node and the standard temperature, the inlet conductivity signal at the current sampling node is converted to the inlet conductivity signal at the standard temperature. Similarly, the conversion between the outlet temperature signal and the outlet conductivity signal under the same sampling node can also be completed.

[0072] Therefore, after conversion, the inlet conductivity signal and the outlet conductivity signal at the same sampling node under the standard temperature can be obtained. By comparing them under a unified standard, it is possible to more accurately determine whether the stratified liquids at the inlet and outlet of the flow channel are the same liquid. This improves the accuracy of the controller 100 in adjusting the timing of the outlet valve 116, and accurately realizes the separation function after solvent extraction.

[0073] Optionally, adjusting the working position of the outlet valve body 116 in the corresponding flow channel according to the difference between the inlet conductivity signal and the outlet conductivity signal includes: if the difference between the inlet conductivity signal and the outlet conductivity signal returns from outside the preset range to within the preset range, then switch the working position of the outlet valve body 116 so that the different collection bottles 400 in the configuration component 600 are respectively connected to the outlet of the corresponding flow channel.

[0074] Taking two collection bottles of 400 as an example: Figure 1 , Figure 2 and Figure 4 As shown, each configuration component 600 includes two collection bottles 400 and a separating bottle 300 containing two types of layered liquids. After separation begins, the first type of layered liquid flows into one of the two collection bottles 400 through the inlet and outlet of the flow channel. When the absolute value of the difference between the inlet and outlet conductivity signals is detected to be within a preset range (which can be the aforementioned fluctuation range of the same solution medium), it is considered that the inlet and outlet of the flow channel are the same liquid, and the outlet valve 116 does not operate. When the absolute value of the difference between the inlet and outlet conductivity signals is detected to be outside the preset range, it is considered that the inlet and outlet of the flow channel are the same liquid. When the inlet and outlet are not the same liquid, it means that the second type of liquid has flowed in through the inlet, but the first type of liquid has not yet completely flowed out through the outlet. At this time, the outlet valve 116 does not operate, ensuring that the first type of liquid flows out completely. When the absolute value of the difference between the inlet conductivity signal and the outlet conductivity signal is detected to return to the preset range again, it is considered that the inlet and outlet of the flow channel are the same liquid, which means that the first type of liquid has completely flowed out. At this time, the outlet valve 116 is controlled to operate, connecting the outlet of the flow channel to another collection bottle 400, so that the second type of liquid flows smoothly into the other collection bottle 400, completing the separation of the two types of liquids.

[0075] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic liquid dispensing device, characterized in that, It includes a controller and a flow pool module, wherein the flow pool module has at least one flow channel and a set of configuration components are matched to each flow channel; Each set of configuration components includes a dispensing bottle connected to the inlet of the corresponding flow channel, a collection bottle connected to the outlet of the corresponding flow channel, and an inlet conductivity probe, an outlet conductivity probe, and an outlet valve body that are electrically connected to the controller respectively. The inlet conductivity probe is used to collect the inlet conductivity signal at the corresponding flow channel inlet, and the outlet conductivity probe is used to collect the outlet conductivity signal at the corresponding flow channel outlet. The outlet valve body is disposed in the corresponding flow channel, and the controller is used to adjust the working position of the outlet valve body according to the inlet conductivity signal and the outlet conductivity signal; Each set of configuration components includes multiple collection bottles corresponding to the amount of stratified liquid in the dispensing bottle. The multiple collection bottles are respectively connected to the outlet of the corresponding flow channel through the liquid outlet valve body, so that under the control of the controller, the stratified liquid flows into different collection bottles respectively. The controller is configured to: determine that the liquid in the flow channel is the same liquid when the difference between the inlet conductivity signal and the outlet conductivity signal is within a preset range; determine that the former layered liquid has been replaced by the latter layered liquid when the difference changes from within the preset range to outside the preset range and then returns to the preset range; and switch the working position of the outlet valve body so that the different collection bottles in the configuration assembly are connected to the outlet of the corresponding flow channel.

2. The automatic liquid dispensing device as described in claim 1, characterized in that, Each set of configuration components also includes an inlet temperature probe and an outlet temperature probe, which are electrically connected to the controller. The inlet temperature probe and the outlet temperature probe are used to collect the inlet temperature signal at the inlet of the corresponding flow channel and the outlet temperature signal at the outlet of the corresponding flow channel, respectively. The controller is also used to convert the inlet conductivity signal and the outlet conductivity signal based on the inlet temperature signal and the outlet temperature signal, so as to adjust the working position of the outlet valve body accordingly.

3. The automatic liquid dispensing device as described in claim 2, characterized in that, Each controller is electrically connected to the inlet temperature probe, the outlet temperature probe, the inlet conductivity probe, and the outlet conductivity probe in each configuration component via a flow channel selection circuit.

4. The automatic liquid dispensing device as described in claim 1, characterized in that, The liquid outlet valve body is located at the outlet of the corresponding flow channel. Each set of configuration components also includes a liquid inlet valve body located at the inlet of the corresponding flow channel. The liquid inlet valve body is electrically connected to the controller and is used to control the on / off state of the flow channel inlet.

5. The automatic liquid dispensing device according to any one of claims 1 to 4, characterized in that, The automatic liquid dispensing device also includes a touch screen, which is used for electrical connection with the controller.

6. The automatic liquid dispensing device according to any one of claims 1 to 4, characterized in that, The automatic liquid dispensing device also includes a communication module, which is used to electrically connect to the controller.

7. An automatic liquid dispensing control method, characterized in that, The method is applied to the automatic liquid dispensing device according to any one of claims 1 to 6, and the method includes: Identify the dispensing command, which includes at least the flow channel information of the flow cell module; Based on the identified flow channel information, the inlet conductivity signal and outlet conductivity signal of the corresponding flow channel inlet and outlet are obtained respectively. Based on the difference between the inlet conductivity signal and the outlet conductivity signal, adjust the working position of the outlet valve body in the corresponding flow channel; The step of adjusting the working position of the outlet valve body in the corresponding flow channel based on the difference between the inlet conductivity signal and the outlet conductivity signal includes: When the difference between the inlet conductivity signal and the outlet conductivity signal is within a preset range, it is determined that the liquid in the flow channel is the same type of liquid; when the difference changes from within the preset range to outside the preset range and then returns to the preset range, it is determined that the former layered liquid has been replaced by the latter layered liquid. At this time, the working position of the outlet valve body is switched so that the different collection bottles in the configuration assembly are connected to the outlet of the corresponding flow channel.

8. The automatic liquid dispensing control method as described in claim 7, characterized in that, The step of adjusting the working position of the outlet valve body in the corresponding flow channel based on the difference between the inlet conductivity signal and the outlet conductivity signal includes: First, the influent conductivity signal and the effluent conductivity signal are converted into influent conductivity signal and effluent conductivity signal at standard temperature; Based on the difference between the inlet conductivity signal and the outlet conductivity signal at standard temperature, adjust the working position of the outlet valve body in the corresponding flow channel.

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