Integrated waterway board and micro waterway system

Abstract

This utility model relates to an integrated water circuit board and a micro water circuit system. The integrated water circuit board includes a microfluidic chip, and inlet / outlet control lines, a mixing line, and a colorimetric line disposed on the microfluidic chip. One end of the mixing line is connected to the inlet / outlet control line, and the other end of the mixing line is connected to one end of the colorimetric line. The other end of the colorimetric line is connected to the inlet / outlet control line. The colorimetric line includes at least two colorimetric channels of different lengths, and all colorimetric channels are connected in series. The microfluidic chip has at least four mounting cavities for placing colorimetric elements. Each colorimetric channel corresponds to two mounting cavities, and the colorimetric channel is located between the corresponding two mounting cavities, and the colorimetric channel and the corresponding mounting cavity are in a straight line. The colorimetric channel is connected to the corresponding mounting cavity, or a light-transmitting area is provided in the region between the colorimetric channel and the corresponding mounting cavity in the microfluidic chip. This utility model can significantly reduce the loss of pure water and reagents, improve detection efficiency, and has strong versatility.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to an integrated water circuit board and a micro water circuit system. Background Technology

[0002] Currently, online water quality analyzers have numerous and complex pipelines, resulting in relatively high consumption of samples, reagents, and pure water (for rinsing). However, the actual sample requirement during analysis is not large. Therefore, it is necessary to find a detection water path that can reduce the consumption of pure water and reagents. Furthermore, due to the numerous and complex pipelines, the overall flow path of the liquid is relatively long, affecting detection efficiency. Additionally, current online water quality analyzers often perform colorimetric analysis in a flow cell, and their colorimetric optical path is usually constant, limiting their versatility. Utility Model Content

[0003] The purpose of this invention is to provide an integrated water circuit board and a micro water circuit system, which can significantly reduce the loss of pure water and reagents, improve detection efficiency, and has strong versatility.

[0004] To achieve the above objectives, this utility model discloses an integrated water circuit board, comprising a microfluidic chip, and inlet / outlet control lines, a mixing line, and a colorimetric line disposed on the microfluidic chip. One end of the mixing line is connected to the inlet / outlet control line, and the other end of the mixing line is connected to one end of the colorimetric line. The other end of the colorimetric line is connected to the inlet / outlet control line. The colorimetric line includes at least two colorimetric channels of different lengths, and all the colorimetric channels are connected in series. The microfluidic chip is provided with at least four mounting cavities for placing colorimetric elements. Each colorimetric channel corresponds to two mounting cavities, and the colorimetric channel is located between the corresponding two mounting cavities, and the colorimetric channel and the corresponding mounting cavity are in a straight line. The colorimetric channel is connected to the corresponding mounting cavity, or, the area between the colorimetric channel and the corresponding mounting cavity of the microfluidic chip is provided with a light-transmitting area.

[0005] With the above settings, by integrating the inlet / outlet control lines, mixing lines, and colorimetric lines onto the microfluidic chip, the water circuit can be effectively simplified and shortened, thereby significantly reducing the loss of pure water and reagents and improving detection efficiency. By setting colorimetric channels of different lengths, i.e., colorimetric channels with different optical paths, the detection requirements of different parameters can be met, improving the versatility of the integrated water circuit board.

[0006] Preferably, the colorimetric channel is horizontal in length, with its lower inner wall horizontal and its upper inner wall inclined. The cross-sectional area of ​​the colorimetric channel increases along the liquid inlet and outlet directions. This configuration effectively avoids the influence of air bubbles on colorimetric analysis.

[0007] Preferably, the microfluidic chip is vertically arranged, and the colorimetric channels are spaced apart in the vertical direction. This arrangement facilitates the fabrication and arrangement of the microfluidic chip and also helps to reduce the influence of bubbles on colorimetry.

[0008] Preferably, the mixing pipeline includes at least one mixing pipe section, all of which are connected in series and arranged in a wavy pattern. This arrangement facilitates uniform mixing of the water sample and reagents.

[0009] This utility model also discloses a micro water system, including a peristaltic pump, a multi-way sampling valve, and the aforementioned integrated water circuit board. Both the peristaltic pump and the multi-way sampling valve are connected to inlet / outlet control pipelines. The inlet / outlet control pipelines include several two-position three-way valves. An external peristaltic pump provides power to the inlet / outlet control pipelines, and a microfluidic chip controls the two-position three-way valves to control the inlet / outlet flow. By setting up multi-way sampling valves, the system can selectively inject pure water, water samples, or other liquids into the inlet / outlet control pipelines, or discharge toxic waste liquids, or connect to the atmosphere, thus improving the scalability of the water system.

[0010] Preferably, the two-position three-way valve includes an inlet / outlet control valve, a first valve, a second valve, and a drug inlet valve Q1-Q. n n is a positive integer not less than 2; inlet valve Q1-Q n The normally closed ends of all valves serve as the drug inlet ports for the inlet and outlet control pipelines. The normally open end of inlet valve Q1 is connected to the common end of inlet valve Q2, the normally open end of inlet valve Q2 is connected to the common end of inlet valve Q3, and so on up to Q... n-1 The normally open terminal is connected to the drug inlet valve Q. n public terminal; Q n The normally open end of the valve is connected to the common end of the inlet / outlet control valve; the normally open end of the inlet / outlet control valve is connected to the normally open end of the first valve; the common end of the first valve is connected to the end of the colorimetric pipeline away from the mixing pipeline; the normally closed end of the first valve is connected to the common end of the second valve; the normally closed end of the second valve is connected to the external non-toxic waste liquid pipeline; the normally open end of the second valve is suspended or connected to the external gas pipeline; the inlet of the peristaltic pump is connected to the common end of the drug inlet valve Q1; the outlet of the peristaltic pump is connected to the end of the mixing pipeline away from the colorimetric pipeline; the multi-port injection valve is connected to the normally closed end of the inlet / outlet control valve.

[0011] Preferably, the system further includes a digestion module; the two-position three-way valve also includes a third valve and a fourth valve, the common end of the third valve is connected to the outlet of the peristaltic pump, the normally open end of the third valve is connected to the normally open end of the fourth valve, the normally closed end of the third valve is connected to the inlet of the digestion module, the outlet of the digestion module is connected to the normally closed end of the fourth valve, and the common end of the fourth valve is connected to the end of the mixing pipeline away from the colorimetric pipeline. By including the digestion module, the functionality of the water system can be further expanded.

[0012] Preferably, the digestion module is a UV digestion device, a heating digestion device, or a UV / heating integrated digestion device.

[0013] Preferably, the system also includes a backup colorimetric module; the two-position three-way valve further includes a fifth valve, the common end of the fourth valve is connected to the common end of the fifth valve, the normally closed end of the fifth valve is connected to the backup colorimetric module, and the normally open end of the fifth valve is connected to the end of the mixing pipeline away from the colorimetric pipeline. By providing a backup colorimetric module, the system's fault tolerance and scalability can be improved.

[0014] Preferably, the backup colorimetric module is a fluorescence colorimetric device.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model of integrated water circuit board can highly integrate colorimetric, mixing and valve (two-position three-way valve) connection pipelines and components into one, which can reduce the overall water circuit volume to 3-5mL, and can significantly reduce the consumption of pure water and reagents.

[0017] 2. The design of colorimetric channels with different optical paths can meet the detection requirements of different parameters, and the top surface of the colorimetric channel has a certain degree of inclination, which can avoid the influence of bubbles on colorimetric analysis.

[0018] 3. The overall structure of this utility model is simple and easy to connect, which is conducive to the installation of the entire water system and the subsequent maintenance work. This utility model can be applied to water quality analyzers of different sizes and shapes. Attached Figure Description

[0019] Figure 1 This is the waterway diagram of this utility model.

[0020] Figure 2 This is a schematic diagram of an integrated water circuit board.

[0021] Explanation of symbols for main components:

[0022] Microfluidic chip 10, liquid inlet / outlet control line 11, mixing line 12, colorimetric line 13, mixing section 14, colorimetric channel 15, mounting cavity 16, colorimetric light source 17, detector 18;

[0023] Peristaltic pump 20;

[0024] Multi-port injection valve 30;

[0025] Deconstruction module 40;

[0026] 50 spare colorimetric modules. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 2 As shown, this utility model discloses a micro water circuit system, which includes a peristaltic pump 20, an integrated water circuit board, a multi-port sampling valve 30, a digestion module 40, and a backup colorimetric module 50. The integrated water circuit board is a microfluidic chip 10. The peristaltic pump 20, the multi-port sampling valve 30, the digestion module 40, and the backup colorimetric module 50 can be electrically connected to the microfluidic chip for control, or connected to the controller on a water quality analyzer.

[0029] The microfluidic chip 10 has a substrate made of acrylic. Integrated on the microfluidic chip 10 are inlet / outlet control lines 11, mixing lines 12, and colorimetric lines 13. One end of the mixing line 12 is connected to the inlet / outlet control line 11, and the other end of the mixing line 12 is connected to one end of the colorimetric line 13. The other end of the colorimetric line 13 is connected to the inlet / outlet control line 11. Specifically, the inlet / outlet control line 11 includes several two-position three-way valves integrated into the microfluidic chip 10, which controls the operation of these valves.

[0030] In this case, the two-position three-way valve includes an inlet / outlet control valve QA, a first valve QB, a second valve QC, a third valve QD, a fourth valve QE, a fifth valve QF, and inlet valves Q1-Qn, where n is a positive integer not less than 2. The normally closed ends of inlet valves Q1-Qn all serve as the drug inlet ports of the inlet / outlet liquid control line 11, connecting to drug lines R1-Rn. The normally open end of inlet valve Q1 connects to the common end of inlet valve Q2, the normally open end of inlet valve Q2 connects to the common end of inlet valve Q3, and so on until the normally open end of Qn-1 connects to the common end of inlet valve Qn. The normally open end of Qn is connected to the common end of inlet / outlet control valve QA. In a specific embodiment, n=6 is used for illustration. The normally open terminal of the inlet / outlet control valve QA is connected to the normally open terminal of the first valve QB. The normally closed terminal of the first valve QB is connected to the common terminal of the second valve QC. The normally closed terminal of the second valve QC is connected to the external non-toxic waste liquid pipe NW. The normally open terminal of the second valve QC is either suspended or connected to the external gas pipe Air. The normally open terminal of the third valve QD is connected to the normally open terminal of the fourth valve QE. The common terminal of the fourth valve QE is connected to the common terminal of the fifth valve QF. The above port connections can be achieved using external pipes or by forming pipes on the microfluidic chip 10.

[0031] The inlet of the peristaltic pump 20 is connected to the common terminal of the drug inlet valve Q1 via a pipeline, and the outlet of the peristaltic pump 20 is connected to the common terminal of the third valve QD via a pipeline. The outlet of the multi-port injection valve 30 is connected to the normally closed terminal of the inlet / outlet control valve QA via a pipeline. The multi-port injection valve 30 has multiple inlets, and by controlling the operation of the multi-port injection valve 30, one of these inlets is connected to the outlet. The inlets can be connected to the pure water supply pipe (clean), the injection pipe (N), the drug pipe, the toxic waste liquid pipe (TW), etc., and can be added or removed according to the actual application. It can be said that the multi-port injection valve 30 can greatly enhance the scalability of the micro water system to adapt to different application scenarios.

[0032] The digestion module 40 is a UV digestion device, a heating digestion device, or a UV / heating integrated digestion device; these are all existing technologies and will not be described in detail here. The inlet of the digestion module 40 is connected to the normally closed end of the third valve QD via a pipeline, and the outlet of the digestion module 40 is connected to the normally closed end of the fourth valve QE via a pipeline.

[0033] The backup colorimetric module 50 is a fluorescence colorimetric device, which is existing technology and will not be described in detail. The inlet of the backup colorimetric module 50 is connected to the normally closed end of the fifth valve QF via a pipeline.

[0034] The mixing line 12 includes at least one mixing section 14, all of which are connected in series and arranged in a wavy pattern to facilitate uniform mixing of the water sample and reagents. In this case, three mixing sections 14 are provided. One end of the mixing line 12 is connected to the normally open end of the fifth valve QF, and the other end of the mixing line 12 is connected to one end of the colorimetric line 13, the other end of which is connected to the common end of the first valve QB.

[0035] In this design, the colorimetric channel 13 includes at least two colorimetric channels 15 of different lengths, all of which are connected in series. To facilitate layout and eliminate the influence of bubbles on colorimetry, the microfluidic chip 10 is preferably positioned vertically, while the length direction of the colorimetric channels 15 is horizontal, with the channels spaced apart vertically. To further avoid the influence of bubbles on colorimetry, the lower edge of the inner wall of the colorimetric channel 15 is horizontal, while the upper edge is inclined, and the cross-sectional area of ​​the colorimetric channel 15 increases along the liquid inlet / outlet direction (i.e., from the liquid inlet to the liquid outlet).

[0036] The microfluidic chip 10 has at least four mounting cavities 16 for placing colorimetric elements. Each colorimetric channel 15 corresponds to two mounting cavities 16. In this embodiment, five colorimetric channels 15 are provided, and correspondingly, ten mounting cavities 16 are provided. The colorimetric channel 15 is located between the corresponding two mounting cavities 16, and the colorimetric channel 15 and the corresponding mounting cavity 16 are in a straight line. The colorimetric channel 15 is connected to the corresponding mounting cavity 16, or, the area between the colorimetric channel 15 and the corresponding mounting cavity 16 of the microfluidic chip 10 is provided with a light-transmitting area. In this case, the microfluidic chip 10 is made of transparent acrylic, which can ensure that the area between the colorimetric channel 15 and the corresponding mounting cavity 16 is light-transmitting. In the two mounting cavities 16 corresponding to the colorimetric channel 15, one mounting cavity 16 is used to install a colorimetric light source 17, and the other mounting cavity 16 is used to install a detector 18.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated waterway board, characterized by: The device includes a microfluidic chip, and inlet / outlet control lines, mixing lines, and colorimetric lines disposed on the microfluidic chip. One end of the mixing line is connected to the inlet / outlet control line, and the other end of the mixing line is connected to one end of the colorimetric line. The other end of the colorimetric line is connected to the inlet / outlet control line. The colorimetric line includes at least two colorimetric channels of different lengths, and all the colorimetric channels are connected in series. The microfluidic chip has at least four mounting cavities for placing colorimetric elements. Each colorimetric channel corresponds to two mounting cavities. The colorimetric channel is located between the two corresponding mounting cavities, and the colorimetric channel and the corresponding mounting cavity are in a straight line. The colorimetric channel is connected to the corresponding mounting cavity. Alternatively, a light-transmitting area is provided in the region between the colorimetric channel and the corresponding mounting cavity in the microfluidic chip.

2. The integrated waterway board of claim 1, wherein: The colorimetric channel is horizontal in length, with its lower inner wall horizontal and its upper inner wall inclined. The cross-sectional area of ​​the colorimetric channel increases along the liquid inlet and outlet directions.

3. The integrated waterway board of claim 1, wherein: The microfluidic chip is vertically arranged, and the colorimetric channels are spaced apart in the vertical direction.

4. The integrated waterway board of claim 1, wherein: The hybrid pipeline includes at least one hybrid pipe section, all of which are connected in series and are arranged in a wavy pattern.

5. A micro waterway system characterized by: The system includes a peristaltic pump, a multi-way injection valve, and an integrated water circuit board as described in any one of claims 1-4, wherein the peristaltic pump and the multi-way injection valve are both connected to the inlet and outlet control pipeline; the inlet and outlet control pipeline includes a plurality of two-position three-way valves.

6. The micro waterway system according to claim 5, wherein: The two-position three-way valve includes an inlet / outlet control valve, a first valve, a second valve, and a drug inlet valve Q1-Q. n n is a positive integer not less than 2; inlet valve Q1-Q n The normally closed ends of all valves serve as the drug inlet ports for the inlet and outlet control pipelines. The normally open end of inlet valve Q1 is connected to the common end of inlet valve Q2, the normally open end of inlet valve Q2 is connected to the common end of inlet valve Q3, and so on up to Q... n-1 The normally open terminal is connected to the drug inlet valve Q. n The common terminal of Qn; the normally open terminal of Qn is connected to the common terminal of the inlet / outlet control valve; the normally open terminal of the inlet / outlet control valve is connected to the normally open terminal of the first valve, the common terminal of the first valve is connected to the end of the colorimetric pipeline away from the mixing pipeline, the normally closed terminal of the first valve is connected to the common terminal of the second valve, the normally closed terminal of the second valve is connected to the external non-toxic waste liquid pipeline, and the normally open terminal of the second valve is suspended or connected to the external gas pipeline; the inlet of the peristaltic pump is connected to the common terminal of the drug inlet valve Q1, and the outlet of the peristaltic pump is connected to the end of the mixing pipeline away from the colorimetric pipeline; the multi-port injection valve is connected to the normally closed terminal of the inlet / outlet control valve.

7. The micro waterway system according to claim 6, wherein: It also includes a digestion module; the two-position three-way valve further includes a third valve and a fourth valve, the common end of the third valve is connected to the outlet of the peristaltic pump, the normally open end of the third valve is connected to the normally open end of the fourth valve, the normally closed end of the third valve is connected to the inlet of the digestion module, the outlet of the digestion module is connected to the normally closed end of the fourth valve, and the common end of the fourth valve is connected to the end of the mixing pipeline away from the colorimetric pipeline.

8. The micro waterway system according to claim 7, wherein: The digestion module is a UV digestion device, a heating digestion device, or a UV / heating integrated digestion device.

9. The micro waterway system of claim 7, wherein: It also includes a backup colorimetric module; the two-position three-way valve also includes a fifth valve, the common end of the fourth valve is connected to the common end of the fifth valve, the normally closed end of the fifth valve is connected to the backup colorimetric module, and the normally open end of the fifth valve is connected to the end of the mixing pipeline away from the colorimetric pipeline.

10. The micro waterway system according to claim 9, wherein: The backup colorimetric module is a fluorescence colorimetric device.

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