Flow cell device

Abstract

A flow cell device, belonging to the technical field of detection. The flow cell device comprises a light guide tube (100), a first optical fiber (210), a second optical fiber (220), a light-absorbing tube (300), a first light-blocking member (510), and a second light-blocking member (520). The light guide tube (100) has an inner cavity (110), and two ends of the light guide tube (100) are provided with a first opening (120) and a second opening (130), respectively. The first opening (120) and the second opening (130) are in communication with each other through the inner cavity (110), and the inner cavity (110) is configured to be filled with a liquid to be tested (400). A light-emitting end (211) of the first optical fiber (210) faces the first opening (120), and a receiving end (221) of the second optical fiber (220) faces the second opening (130). Light emitted by the first optical fiber (210) passes through the first opening (120), the liquid to be tested (400), and the second opening (130) in sequence, and enters the second optical fiber (220). The light-absorbing tube (300) is sleeved outside the light guide tube (100). The first light-blocking member (510) is disposed between the first optical fiber (210) and the light guide tube (100), and the second light-blocking member (520) is disposed between the second optical fiber (220) and the light guide tube (100), thereby resolving the problem of low detection accuracy of flow cell devices in the prior art.

Description

Flow cell device

[0001] This application claims priority to Chinese Patent Application No. 202510347722.2, filed on March 24, 2025, entitled "Flow Pool Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of detection technology, specifically relating to a flow cell device. Background Technology

[0003] A flow cell device can be used to detect parameters such as the type and concentration of a liquid. Specifically, the flow cell device may include a housing, a light guide, a first optical fiber, and a second optical fiber. The housing is encapsulated on the light guide to protect it. The first and second optical fibers are distributed at opposite ends of the light guide. The liquid to be tested flows through the light guide. The first optical fiber is used to transmit detection light to the light guide. After the detection light passes through the liquid to be tested, it is received by the second optical fiber. Thus, the type, concentration, and other parameters of the liquid to be tested can be detected and analyzed by the change of the detection light.

[0004] Because some of the detection light provided by the first optical fiber is reflected through the wall of the optical guide tube or the air gap between the optical guide tube and the outer shell, it re-enters the optical guide tube, forming stray light. This stray light does not pass through the liquid to be tested, or only a portion of the stray light passes through the liquid to be tested. This means that the stray light does not carry or carries very little information about the liquid to be tested. This stray light will eventually be received by the second optical fiber, which will affect the detection and analysis of the liquid to be tested by the flow cell device, thus reducing the accuracy of the detection results.

[0005] In summary, the flow cell devices involved in the relevant technologies suffer from low detection accuracy. Summary of the Invention

[0006] This application discloses a flow cell device to solve the problem of low detection accuracy in flow cell devices involved in related technologies.

[0007] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0008] A flow cell device includes a light guide tube, a first optical fiber, a second optical fiber, a light absorber, a first light-blocking element, and a second light-blocking element.

[0009] The optical guide has an inner cavity, and the two ends of the optical guide are respectively provided with a first opening and a second opening. The first opening and the second opening are connected through the inner cavity. The inner cavity is used to fill the liquid to be tested. The light-emitting end of the first optical fiber faces the first opening, and the receiving end of the second optical fiber faces the second opening. The light emitted by the first optical fiber passes through the first opening, the liquid to be tested and the second opening in sequence, and enters the second optical fiber. The light-absorbing tube is sleeved on the outside of the optical guide.

[0010] The first light-blocking component is disposed between the first optical fiber and the optical guide tube, and the second light-blocking component is disposed between the second optical fiber and the optical guide tube.

[0011] The technical solution adopted in this application can achieve the following beneficial effects:

[0012] In this application, because the light-absorbing tube has a light-absorbing function and is sleeved outside the light guide tube, the light emitted from the first optical fiber and reflected by the light guide tube to the light-absorbing tube can be absorbed by the light-absorbing tube and will not be further reflected into the light guide tube. Therefore, this can reduce the amount of stray light received at the receiving end of the second optical fiber to a certain extent, thereby avoiding interference with the detection and analysis of the liquid under test by the flow cell device, and thus improving the accuracy of the detection results to a certain extent. Furthermore, both the first and second light-blocking components have a certain effect on blocking stray light, which can further improve the accuracy of the detection results. Therefore, the flow cell device disclosed in this application can solve the problem of low detection accuracy in flow cell devices involved in related technologies. Attached Figure Description

[0013] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0014] Figure 1 is a schematic diagram of the flow cell device disclosed in an embodiment of this application;

[0015] Figure 2 is an enlarged view of point A in Figure 1;

[0016] Figure 3 is an enlarged view of point B in Figure 1;

[0017] Figure 4 is a schematic diagram of the connection structure of the light guide and the light absorption tube disclosed in the embodiment of this application;

[0018] Figure 5 is a schematic diagram of the connection structure of the outer shell, light guide tube, and light absorption tube disclosed in the embodiments of this application;

[0019] Figure 6 is a structural schematic diagram of the first or second light-blocking component disclosed in the embodiments of this application;

[0020] Figure 7 is a schematic diagram of the connection structure of the first optical fiber, the first infusion tube and the first mounting component disclosed in the embodiments of this application, or a schematic diagram of the connection structure of the second optical fiber, the second infusion tube and the second mounting component.

[0021] Figure 8 is a partially enlarged schematic diagram of Figure 7.

[0022] Explanation of reference numerals in the attached drawings: 100-Optical guide tube, 110-Inner cavity, 120-First opening, 130-Second opening; 210-First optical fiber, 211-Emitting end, 220-Second optical fiber, 221-Receiving end; 300-Light absorption tube; 400-Liquid to be tested; 510-First light-blocking component, 511-First through hole, 512-First groove, 520-Second light-blocking component, 521-Second through hole, 522-Second groove, 530-First coating; 610-Outer shell, 611-First mounting groove, 612-Second mounting groove, 620-Bracket, 630-First positioning component, 640-Second positioning component, 650-First pressing component, 660-Second pressing component, 670-First pressure plate, 680-Second pressure plate, 690-Second connecting component; 710-First infusion tube, 720-Second infusion tube, 730-First connector, 740-Second connector; 810-First mounting component, 811-First surface, 812-Fourth through hole, 813-First hole segment, 814-Second hole segment, 820-Second mounting component, 821-Second surface, 822-Fifth through hole, 823-Third hole segment, 824-Fourth hole segment, 830-Positioning pin, 840-Mounting flange. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this application are within the scope of protection of this application.

[0024] The flow pool device disclosed in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0025] Please refer to Figures 1-4. This application discloses a flow cell device, which includes a light guide tube 100, a first optical fiber 210, a second optical fiber 220, a light absorber 300, a first light blocking element 510, and a second light blocking element 520.

[0026] The light guide 100 has a light guiding function, that is, light can pass through the light guide 100. The light guide 100 has an inner cavity 110, and the two ends of the light guide 100 are respectively provided with a first opening 120 and a second opening 130. The first opening 120 and the second opening 130 are connected through the inner cavity 110. The inner cavity 110 is used to fill the liquid to be tested 400. The liquid to be tested 400 can enter the inner cavity 110 through the first opening 120 and flow out through the second opening 130.

[0027] Both the first optical fiber 210 and the second optical fiber 220 are used to transmit light. The light-emitting end 211 of the first optical fiber 210 faces the first opening 120, and the receiving end 221 of the second optical fiber 220 faces the second opening 130. The light emitted by the first optical fiber 210 can pass through the first opening 120, the liquid to be tested 400, and the second opening 130 in sequence, and enter the second optical fiber 220. That is, the light emitted by the light-emitting end 211 can enter the inner cavity 110 through the first opening 120 and pass through the liquid to be tested 400 filled in the inner cavity 110, so that the light can carry the information of the liquid to be tested 400. The light can enter the receiving end 221 through the second opening 130, so that the second optical fiber 220 can transmit the light carrying the information of the liquid to be tested 400 to the subsequent analysis device. The analysis device can detect and analyze the liquid to be tested 400 to obtain the type of the liquid to be tested 400, and can also obtain parameters such as the color, pH, and concentration of the liquid to be tested 400.

[0028] The light-absorbing tube 300 has a light-absorbing function, and the light-absorbing tube 300 is sleeved outside the light guide tube 100. This allows the light emitted by the first optical fiber 210 and reflected by the light guide tube 100 to the outside of the light guide tube 100 to reach the light-absorbing tube 300. The light-absorbing tube 300 can fully absorb this part of the light, that is, this part of the light will not be reflected back into the light guide tube 100 by the light-absorbing tube 300.

[0029] Both the first light-blocking element 510 and the second light-blocking element 520 have the function of blocking light. The first light-blocking element 510 is disposed between the first optical fiber 210 and the optical guide tube 100, and the second light-blocking element 520 is disposed between the second optical fiber 220 and the optical guide tube 100, so that the first light-blocking element 510 can block part of the stray light emitted by the first optical fiber 210, and the second light-blocking element 520 can block the stray light coming out from the optical guide tube 100, so as to prevent the stray light from being received by the second optical fiber 220.

[0030] In this application, because the light-absorbing tube 300 has a light-absorbing function and is sleeved outside the light guide tube 100, the light emitted from the first optical fiber 210 and reflected by the light guide tube 100 to the light-absorbing tube 300 can be absorbed by the light-absorbing tube 300 and will not be further reflected into the light guide tube 100. Therefore, this can reduce the amount of stray light received by the receiving end 221 of the second optical fiber 220 to a certain extent, thereby avoiding affecting the detection and analysis of the liquid 400 under test by the flow cell device, which can improve the accuracy of the detection results to a certain extent. Furthermore, both the first light-blocking element 510 and the second light-blocking element 520 have a certain effect on blocking stray light, which can further improve the accuracy of the detection results. Therefore, the flow cell device disclosed in this application can solve the problem of low detection accuracy in flow cell devices involved in related technologies.

[0031] Optionally, the light-absorbing tube 300 can be black so that it has a light-absorbing function, and the light-absorbing tube 300 can be a black rigid tube.

[0032] In another embodiment, the light-absorbing tube 300 can be a black heat-shrink tubing. That is, the light-absorbing tube 300 is not only black in color, but it can also shrink and deform when heated. Specifically, after the light-absorbing tube 300 is fitted onto the light guide tube 100, heating the light-absorbing tube 300 causes it to shrink and deform towards the light guide tube 100. In this state, the inner wall of the light-absorbing tube 300 can adhere to the outer wall of the light guide tube 100. Please refer to Figures 2 to 5 for details. At this time, there is essentially no gap between the inner wall of the light-absorbing tube 300 and the outer wall of the light guide tube 100. This prevents air from reflecting light back into the light guide tube 100 due to a gap between the light-absorbing tube 300 and the light guide tube 100. In other words, light reflected to the outside of the light guide tube 100 can be quickly and directly absorbed by the light-absorbing tube 300, thereby further reducing stray light generation and further improving the accuracy of the detection results.

[0033] Optionally, referring to Figures 2, 3, and 6, the first light-blocking component 510 is provided with a first through hole 511 penetrating through the first light-blocking component 510. The first optical fiber 210 faces the first through hole 511, and the first through hole 511 faces the first opening 120, so that the light emitted from the light-emitting end 211 of the first optical fiber 210 can enter the inner cavity 110 through the first through hole 511 and the first opening 120. Figure 6 shows a schematic diagram of the structure of the first light-blocking component 510. When Figure 6 represents the second light-blocking component 520, the second light-blocking component 520 is the component indicated by 510 in the figure. The second light-blocking component 520 is provided with a second through hole 521 penetrating through the second light-blocking component 520. The second optical fiber 220 faces the second through hole 521, and the second through hole 521 faces the second opening 130, so that the light entering the inner cavity 110 can enter the receiving end 221 of the second optical fiber 220 through the second opening 130 and the second through hole 521.

[0034] In this embodiment, the first light-blocking element 510 and the second light-blocking element 520 can both cover the end face of the light guide 100. Optionally, the first light-blocking element 510 and the second light-blocking element 520 can both cover a portion of the end face of the light guide 100, or the first light-blocking element 510 and the second light-blocking element 520 can both cover the entire end face of the light guide 100. This allows the first light-blocking element 510 to block at least a portion of the light rays facing the end face of the light guide 100, further preventing light rays from passing through the wall of the light guide 100. The second light-blocking element 520 can block at least a portion of the light rays emitted from the end face of the light guide 100, further preventing stray light from affecting the final detection result. Of course, in other embodiments, only one of the first light-blocking element 510 and the second light-blocking element 520 may cover the end face of the light guide 100.

[0035] In this embodiment, when both the first light-blocking element 510 and the second light-blocking element 520 cover the entire end face of the light guide 100, the first through hole 511 can be exactly opposite to the first opening 120, and the second through hole 521 can be exactly opposite to the second opening 130. This can better prevent light from passing through the tube wall of the light guide 100 and better prevent the second optical fiber 220 from receiving light emitted from the end face of the light guide 100.

[0036] Optionally, both the first through hole 511 and the second through hole 521 can be circular holes, and both the first opening 120 and the second opening 130 can also be circular openings. To ensure that both the first light-blocking element 510 and the second light-blocking element 520 can cover the end face of the light guide 100, the axis of the first through hole 511 coincides with the axis of the first opening 120, and the axis of the second through hole 521 coincides with the axis of the second opening 130. Furthermore, the diameter of the first through hole 511 can be less than or equal to the diameter of the first opening 120, and the diameter of the second through hole 521 can also be less than or equal to the diameter of the second opening 130. Of course, this embodiment does not specifically limit the shape of the first through hole 511, the shape of the second through hole 521, the shape of the first opening 120, and the shape of the second opening 130, as long as both the first light-blocking element 510 and the second light-blocking element 520 can cover the end face of the light guide 100.

[0037] Optionally, to facilitate the protection of the light guide tube 100 and the light absorption tube 300, the flow cell device may further include a housing 610, which is fitted over the light absorption tube 300, with both the first opening 120 and the second opening 130 exposed outside the housing 610. The housing 610 can prevent the external environment from causing adverse interference to the light guide tube 100. To facilitate the delivery of the test liquid 400 into the inner cavity 110 and the discharge of the test liquid 400 from the inner cavity 110, the flow cell device may further include a first infusion tube 710 and a second infusion tube 720. The first infusion tube 710 is located near the first opening 120 so that the first infusion tube 710 can deliver the test liquid 400 into the inner cavity 110 through the first opening 120. The second infusion tube 720 is located near the second opening 130 so that the test liquid 400 in the inner cavity 110 can flow to the second infusion tube 720 through the second opening 130.

[0038] In this embodiment, referring to Figures 1 to 3, 7, and 8, the flow cell device may further include a first mounting component 810 and a second mounting component 820. Figure 7 shows a schematic diagram of the connection structure of the first optical fiber 210, the first infusion tube 710, and the first mounting component 810. When Figure 7 shows a schematic diagram of the connection structure of the second optical fiber 220, the second infusion tube 720, and the second mounting component 820, the second optical fiber 220, the second infusion tube 720, the second mounting component 820, and the light-emitting end 211 are the components indicated by 210, 710, 810, and 211 in the figure, respectively. The first optical fiber 210 and the first infusion tube 720... Liquid tubes 710 are spaced apart and installed on the first mounting member 810, meaning that the first optical fiber 210 and the first infusion tube 710 can both be integrated on the first mounting member 810. The second optical fiber 220 and the second infusion tube 720 are spaced apart and installed on the second mounting member 820, meaning that the second optical fiber 220 and the second infusion tube 720 can both be integrated on the second mounting member 820. Both the first mounting member 810 and the second mounting member 820 are connected to the outer shell 610, so that the first infusion tube 710 can deliver the test liquid 400 into the inner cavity 110 and the second infusion tube 720 can discharge the test liquid 400 from the inner cavity 110.

[0039] Therefore, during the assembly process, the operator can simultaneously install the entire assembly consisting of the first optical fiber 210, the first infusion tube 710, and the first mounting component 810 onto the housing 610, and can also simultaneously install the entire assembly consisting of the second optical fiber 220, the second infusion tube 720, and the second mounting component 820 onto the housing 610. This can improve assembly efficiency to a certain extent, and this arrangement can reduce the number of parts in the flow cell device. Of course, in other embodiments, the flow cell device may not include the first mounting component 810 and the second mounting component 820, that is, the operator can install the first optical fiber 210, the first infusion tube 710, the second optical fiber 220, and the second infusion tube 720 onto the housing 610 sequentially.

[0040] Optionally, referring to Figure 1, the flow cell device may further include a support 620, and a housing 610 may be mounted on the support 620 so that the support 620 can support the housing 610 and other components disposed on the housing 610. Since the first optical fiber 210 and the second optical fiber 220 are generally relatively soft, in order to facilitate the stability of the first optical fiber 210 and the second optical fiber 220, the flow cell device may further include a first positioning member 630, a second positioning member 640, a first pressing member 650, and a second pressing member 660. The first positioning member 630 is sleeved on the area of ​​the first optical fiber 210 away from the optical guide tube 100, and the second positioning member 640 is sleeved on the area of ​​the second optical fiber 220 away from the optical guide tube 100. The first positioning member 630 and the second positioning member 640 are respectively installed at opposite ends of the support 620 so that the first positioning member 630 can support and position the first optical fiber 210, and the second positioning member 640 can support and position the second optical fiber 220. When Figure 7 shows a schematic diagram of the connection structure of the second optical fiber 220, the second infusion tube 720, and the second mounting component 820, the second positioning component 640 is the component indicated by 630 in the figure.

[0041] In this embodiment, the first pressing member 650 can be pressed onto the first optical fiber 210, and the second pressing member 660 can be pressed onto the second optical fiber 220. The first pressing member 650 and the second pressing member 660 can be installed on the bracket 620 through different second connectors 690 to further ensure the stability of the setting of the first optical fiber 210 and the second optical fiber 220, thereby ensuring that the first optical fiber 210 can stably provide light to the light guide tube 100 and the second optical fiber 220 can stably receive light.

[0042] Optionally, the flow cell device may further include a first connector 730 and a second connector 740. When Figure 7 shows a schematic diagram of the connection structure of the second optical fiber 220, the second infusion tube 720, and the second mounting component 820, the second connector 740 is the component indicated by 730 in the figure. The first connector 730 is located at the end of the first infusion tube 710 away from the optical guide tube 100, and the second connector 740 is located at the end of the second infusion tube 720 away from the optical guide tube 100. The first connector 730 can facilitate the connection of the first infusion tube 710 to the external delivery source of the liquid to be tested 400, and the second connector 740 can facilitate the connection of the second infusion tube 720 to the external storage cavity of the liquid to be tested 400. Alternatively, the first connector 730 and the second connector 740 can facilitate the connection of the first infusion tube 710 and the second infusion tube 720 to the same liquid container.

[0043] Optionally, referring to Figures 2 and 3, the first light-blocking member 510 can be sandwiched between the first mounting member 810 and the outer shell 610, and the second light-blocking member 520 can be sandwiched between the second mounting member 820 and the outer shell 610. In this embodiment, to facilitate the delivery of the test liquid 400 from the first infusion tube 710 into the inner cavity 110, the side of the first light-blocking member 510 facing the first mounting member 810 may be provided with a first groove 512. The bottom of the groove 512 is provided with a first through hole 511 penetrating the first light-blocking member 510. The first through hole 511 is the first through hole 511 mentioned above, that is, the first through hole 511 faces the first opening 120, the first optical fiber 210 faces the first through hole 511, and the first infusion tube 710 may face the first groove 512. The first groove 512, the first through hole 511 and the first opening 120 are connected in sequence, so that the test liquid 400 output by the first infusion tube 710 can enter the inner cavity 110 in sequence through the first groove 512, the first through hole 511 and the first opening 120.

[0044] Similarly, to facilitate the output of the test liquid 400 from the inner cavity 110 by the second infusion tube 720, the second light-blocking member 520 is provided with a second groove 522 on the side facing the second mounting member 820. The bottom of the groove 522 is provided with a second through hole 521 penetrating the second light-blocking member 520. The second through hole 521 is the second through hole 521 mentioned above, that is, the second through hole 521 faces the second opening 130, the second optical fiber 220 faces the second through hole 521, and the second infusion tube 720 faces the second groove 522. The second groove 522, the second through hole 521 and the second opening 130 are connected in sequence, so that the test liquid 400 in the inner cavity 110 can flow to the second infusion tube 720 in sequence through the second opening 130, the second through hole 521 and the second groove 522.

[0045] Optionally, referring to Figure 6, a first coating 530 may be provided on the outer surface of at least one of the first light-blocking member 510 and the second light-blocking member 520. This first coating 530 may be a soft coating, meaning that the outer surface of at least one of the first light-blocking member 510 and the second light-blocking member 520 is relatively soft and easily deformable. During the process of the first mounting member 810 and the outer shell 610 pressing the first light-blocking member 510, a soft seal can be achieved between the first mounting member 810, the first light-blocking member 510, and the outer shell 610. Similarly, during the process of the second mounting member 820 and the outer shell 610 pressing the second light-blocking member 520, a soft seal can also be achieved between the second mounting member 820, the second light-blocking member 520, and the outer shell 610. This can improve the sealing effect of the entire flow pool device. Of course, in other embodiments, neither the outer surface of the first light-blocking member 510 nor the outer surface of the second light-blocking member 520 may be provided with the first coating 530.

[0046] Optionally, the materials used to make the first light-blocking component 510 and the second light-blocking component 520 can both be metals, and the metal exterior is provided with the aforementioned first coating 530. This gives both the first light-blocking component 510 and the second light-blocking component 520 good mechanical strength and pressure resistance. At the same time, the first coating 530 not only achieves the aforementioned sealing effect, but also enhances the corrosion resistance and anti-aging properties of the first light-blocking component 510 and the second light-blocking component 520, which can effectively ensure the long-term stable operation of the flow cell device.

[0047] Optionally, referring to Figures 1 to 3 and 5, the outer casing 610 has a first mounting groove 611 and a second mounting groove 612 on opposite sides. Specifically, these opposite sides can be the two sides of the outer casing 610 where the first opening 120 and the second opening 130 are exposed. At least a portion of the first mounting member 810 can be confined within the first mounting groove 611, and the first light-blocking member 510 is sandwiched between the bottom of the first mounting groove 611 and the first mounting member 810. At least a portion of the second mounting member 820 can be confined within the second mounting groove 612, and the second light-blocking member 520 is sandwiched between the bottom of the second mounting groove 612 and the second mounting member 820. This ensures the installation stability of the first mounting member 810, the second mounting member 820, the first light-blocking member 510, and the second light-blocking member 520 while improving the overall structural compactness, thereby meeting the requirement of a small volume for the flow cell device. Of course, in other embodiments, the outer casing 610 may not have the first mounting groove 611 and the second mounting groove 612.

[0048] Optionally, referring to Figures 2, 3, 7, and 8, the first mounting member 810 has a first surface 811 facing the first light-blocking member 510, and the second mounting member 820 has a second surface 821 facing the second light-blocking member 520. When Figure 7 shows a schematic diagram of the connection structure of the second optical fiber 220, the second infusion tube 720, and the second mounting member 820, and Figure 8 shows a partially enlarged view of the figure, the second surface 821 is the component indicated by 811 in Figures 7 and 8. The first surface 811 and the second surface 821... At least one of the bottoms of the first mounting groove 611 and the second mounting groove 612 has a groove formed therein, meaning that at least one of the first surface 811, the second surface 821, the bottom of the first mounting groove 611, and the bottom of the second mounting groove 612 is an uneven surface. This increases the roughness of at least one of the first surface 811, the second surface 821, the bottom of the first mounting groove 611, and the bottom of the second mounting groove 612, thereby facilitating the soft sealing effect with the first coating 530. Of course, in other embodiments, the first surface 811, the second surface 821, the bottom of the first mounting groove 611, and the bottom of the second mounting groove 612 may not have grooves formed therein, meaning that the first surface 811, the second surface 821, the bottom of the first mounting groove 611, and the bottom of the second mounting groove 612 may all be flat.

[0049] Optionally, referring to Figures 7 and 8, at least one of the first surface 811 and the second surface 821 may have a protruding positioning post 830, at least one of the first light-blocking member 510 and the second light-blocking member 520 may have a third through hole, and at least one of the bottoms of the first mounting groove 611 and the second mounting groove 612 may have a positioning groove. One end of the positioning post 830 may pass through the third through hole and engage with the positioning groove. That is, in the specific assembly process, the positioning engagement of the positioning post 830 with the positioning groove can further improve the efficiency of assembling the first mounting member 810 and the second mounting member 820 with the outer shell 610. Of course, in other embodiments, the positioning post 830 may not protrude from either the first surface 811 or the second surface 821.

[0050] Optionally, referring to Figure 2, the first mounting member 810 is provided with a fourth through hole 812 penetrating the first mounting member 810. The fourth through hole 812 includes a first hole segment 813 and a second hole segment 814 that are connected. The length of the first hole segment 813 is greater than the length of the second hole segment 814, and the diameter of the first hole segment 813 is greater than the diameter of the second hole segment 814. The second hole segment 814 connects the first hole segment 813 and the first groove 512. The first infusion tube 710 is disposed in the relatively longer first hole segment 813 to ensure the stability of the first infusion tube 710.

[0051] In this embodiment, the first infusion tube 710 is used to deliver the test liquid 400 into the first groove 512 through the second orifice 814, and the inner diameter of the first infusion tube 710 is smaller than the orifice diameter of the second orifice 814. This allows the pressure of the test liquid 400 in the first infusion tube 710 to decrease after entering the second orifice 814, which has a relatively larger orifice diameter. This avoids the seal between the first mounting member 810 and the first light-blocking plate being compromised due to excessive pressure of the test liquid 400. Of course, in other embodiments, the inner diameter of the first infusion tube 710 can be equal to or greater than the orifice diameter of the second orifice 814.

[0052] Optionally, referring to Figure 3, the second mounting component 820 is provided with a fifth through hole 822 penetrating the second mounting component 820. The fifth through hole 822 includes a connected third hole segment 823 and a fourth hole segment 824. The length of the third hole segment 823 is greater than the length of the fourth hole segment 824, and the diameter of the third hole segment 823 is greater than the diameter of the fourth hole segment 824. The fourth hole segment 824 connects the third hole segment 823 and the second groove 522. The second infusion tube 720 is disposed within the relatively longer third hole segment 823 to ensure the stability of the second infusion tube 720. Wherein, when Figure 7 shows a schematic diagram of the connection structure of the second optical fiber 220, the second infusion tube 720, and the second mounting component 820, and Figure 8 shows a partial enlarged view of this diagram, the fourth hole segment 824 is the component indicated by 814 in Figure 8.

[0053] In this embodiment, during the discharge of the test liquid 400 from the inner cavity 110, the test liquid 400 can flow through the second groove 522 and the fourth orifice 824 to the second infusion tube 720. Since the inner diameter of the second infusion tube 720 is smaller than the orifice diameter of the fourth orifice 824, this facilitates the smooth discharge of the test liquid 400 from the second infusion tube 720. Of course, in other embodiments, the inner diameter of the second infusion tube 720 can be equal to or greater than the orifice diameter of the fourth orifice 824.

[0054] Optionally, the first infusion tube 710 can be welded into the first hole segment 813 by welding, which can ensure the sealing between the first hole segment 813 and the first infusion tube 710. The first mounting member 810 is also provided with a sixth through hole penetrating the first mounting member 810. The sixth through hole is spaced apart from the aforementioned fourth through hole 812. The first optical fiber 210 can be bonded to the sixth through hole by the first adhesive, so that the first optical fiber 210 and the first infusion tube 710 can both be integrated on the first mounting member 810.

[0055] The second infusion tube 720 can also be welded into the fourth hole segment 824, which ensures the sealing between the fourth hole segment 824 and the second infusion tube 720. The second mounting member 820 also has a seventh through hole penetrating through it, spaced apart from the aforementioned fifth through hole 822. The second optical fiber 220 can be bonded to the seventh through hole using a second adhesive, allowing both the second optical fiber 220 and the second infusion tube 720 to be integrated onto the second mounting member 820. Of course, this application embodiment does not specifically limit the connection method between the first optical fiber 210 and the first infusion tube 710 and the first mounting member 810, nor does it specifically limit the connection method between the second optical fiber 220 and the second infusion tube 720 and the second mounting member 820.

[0056] Optionally, referring to Figures 1, 7, and 8, at least one of the first mounting member 810 and the second mounting member 820 may have a protruding mounting flange 840 on its outer wall. The mounting flange 840 is detachably connected to the housing 610 via a first connector, that is, the first mounting member 810 and the housing 610 and / or the second mounting member 820 and the housing 610 can be fastened together via the first connector to further ensure the stability of the first mounting member 810 and / or the second mounting member 820. At the same time, the detachable connection of the mounting flange 840 to the housing 610 via the first connector facilitates the disassembly or maintenance of the first mounting member 810 and / or the second mounting member 820 and other components arranged on it. Of course, in other embodiments, neither the first mounting member 810 nor the second mounting member 820 may have a protruding mounting flange 840.

[0057] Optionally, when mounting flanges 840 protrude from the outer walls of both the first mounting member 810 and the second mounting member 820, to further ensure the stability of the first mounting member 810 and the second mounting member 820, referring to Figure 1, the flow-through pool device may further include a first pressure plate 670 and a second pressure plate 680. The first pressure plate 670 can press the mounting flange 840 on the outer wall of the first mounting member 810 onto the outer shell 610, and the second pressure plate 680 can press the mounting flange 840 on the outer wall of the second mounting member 820 onto the outer shell 610, thereby improving the stability of the connection between the mounting flange 840 and the outer shell 610, and thus improving the stability of the first mounting member 810 and the second mounting member 820. Of course, in other embodiments, the flow-through pool device may not include the first pressure plate 670 and the second pressure plate 680.

[0058] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0059] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A flow-through cell device, characterized in that, It includes a light guide tube (100), a first optical fiber (210), a second optical fiber (220), a light absorber (300), a first light-blocking component (510), and a second light-blocking component (520). The optical guide tube (100) has an inner cavity (110), and the two ends of the optical guide tube (100) are respectively provided with a first opening (120) and a second opening (130). The first opening (120) and the second opening (130) are connected through the inner cavity (110). The inner cavity (110) is used to fill the liquid to be tested (400). The light-emitting end (211) of the first optical fiber (210) faces the first opening (120), and the receiving end (221) of the second optical fiber (220) faces the second opening (130). The light emitted by the first optical fiber (210) passes through the first opening (120), the liquid to be tested (400) and the second opening (130) in sequence, and enters the second optical fiber (220). The light-absorbing tube (300) is sleeved on the outside of the optical guide tube (100). The first light-blocking member (510) is disposed between the first optical fiber (210) and the optical guide (100), and the second light-blocking member (520) is disposed between the second optical fiber (220) and the optical guide (100).

2. The flow cell device according to claim 1, characterized in that, The light-absorbing tube (300) is a black heat-shrink tubing. When the light-absorbing tube (300) shrinks and deforms, the inner wall of the light-absorbing tube (300) is attached to the outer wall of the light guide tube (100).

3. The flow-through cell device according to claim 1, characterized in that, Both the first light-blocking member (510) and the second light-blocking member (520) cover the end face of the light guide (100). The first light-blocking member (510) is provided with a first through hole (511) penetrating the first light-blocking member (510), the first optical fiber (210) faces the first through hole (511), the first through hole (511) faces the first opening (120), the second light-blocking member (520) is provided with a second through hole (521) penetrating the second light-blocking member (520), the second optical fiber (220) faces the second through hole (521), the second through hole (521) faces the second opening (130).

4. The flow cell device according to claim 1, characterized in that, The flow cell device further includes a housing (610), a first infusion tube (710), and a second infusion tube (720). The housing (610) is fitted over the light-absorbing tube (300). The first infusion tube (710) is close to the first opening (120) so that the first infusion tube (710) delivers the test liquid (400) into the inner cavity (110) through the first opening (120). The second infusion tube (720) is close to the second opening (130) so that the test liquid (400) in the inner cavity (110) can flow to the second infusion tube (720) through the second opening (130). The flow cell device further includes a first mounting component (810) and a second mounting component (820). The first optical fiber (210) and the first infusion tube (710) are installed at intervals on the first mounting component (810), and the second optical fiber (220) and the second infusion tube (720) are installed at intervals on the second mounting component (820). Both the first mounting component (810) and the second mounting component (820) are connected to the outer casing (610).

5. The flow cell device according to claim 4, characterized in that, The first light-blocking member (510) is sandwiched between the first mounting member (810) and the outer shell (610), and the second light-blocking member (520) is sandwiched between the second mounting member (820) and the outer shell (610). The first light-blocking member (510) has a first groove (512) on the side facing the first mounting member (810). The bottom of the first groove (512) has a first through hole (511) penetrating the first light-blocking member (510). The first optical fiber (210) faces the first through hole (511), the first infusion tube (710) faces the first groove (512), the first through hole (511) faces the first opening (120), and the first groove (512), the first through hole (511) and the first opening (120) are connected in sequence. The second light-blocking member (520) has a second groove (522) on the side facing the second mounting member (820). The bottom of the groove (522) has a second through hole (521) penetrating the second light-blocking member (520). The second optical fiber (220) faces the second through hole (521), the second infusion tube (720) faces the second groove (522), the second through hole (521) faces the second opening (130), and the second groove (522), the second through hole (521) and the second opening (130) are connected in sequence. At least one of the first light-blocking member (510) and the second light-blocking member (520) has a first coating (530) on its outer surface, and the first coating (530) is a soft coating.

6. The flow cell device according to claim 5, characterized in that, The outer casing (610) has a first mounting groove (611) and a second mounting groove (612) on opposite sides respectively. At least a portion of the first mounting member (810) is located within the first mounting groove (611), and the first light-blocking member (510) is sandwiched between the bottom of the first mounting groove (611) and the first mounting member (810). At least a portion of the second mounting member (820) is located within the second mounting groove (612), and the second light-blocking member (520) is sandwiched between the bottom of the second mounting groove (612) and the second mounting member (820).

7. The flow cell apparatus according to claim 6, characterized in that, The first mounting member (810) has a first surface (811) facing the first light-blocking member (510), and the second mounting member (820) has a second surface (821) facing the second light-blocking member (520). At least one of the first surface (811), the second surface (821), the bottom of the first mounting groove (611), and the bottom of the second mounting groove (612) has a groove formed on it.

8. The flow cell apparatus according to claim 7, characterized in that, A positioning post (830) protrudes from at least one of the first surface (811) and the second surface (821). A third through hole is provided on at least one of the first light-blocking member (510) and the second light-blocking member (520). A positioning groove is provided on at least one of the bottom of the first mounting groove (611) and the bottom of the second mounting groove (612). One end of the positioning post (830) can pass through the third through hole and be positioned and engaged with the positioning groove.

9. The flow cell device according to claim 5, characterized in that, The first mounting component (810) is provided with a fourth through hole (812) penetrating the first mounting component (810). The fourth through hole (812) includes a first hole segment (813) and a second hole segment (814) that are connected. The length of the first hole segment (813) is greater than the length of the second hole segment (814). The diameter of the first hole segment (813) is greater than the diameter of the second hole segment (814). The second hole segment (814) connects the first hole segment (813) and the first groove (512). The first infusion tube (710) is disposed in the first hole segment (813). The first infusion tube (710) is used to deliver the test liquid (400) into the first groove (512) through the second hole segment (814). The inner diameter of the first infusion tube (710) is smaller than the diameter of the second hole segment (814). The second mounting component (820) is provided with a fifth through hole (822) penetrating the second mounting component (820). The fifth through hole (822) includes a third hole segment (823) and a fourth hole segment (824) that are connected. The length of the third hole segment (823) is greater than the length of the fourth hole segment (824), and the diameter of the third hole segment (823) is greater than the diameter of the fourth hole segment (824). The fourth hole segment (824) connects the third hole segment (823) and the second groove (522). The second infusion tube (720) is disposed in the third hole segment (823). The liquid to be tested (400) in the inner cavity (110) can flow to the second infusion tube (720) through the second groove (522) and the fourth hole segment (824). The inner diameter of the second infusion tube (720) is smaller than the diameter of the fourth hole segment (824).

10. The flow cell device according to claim 4, characterized in that, At least one of the first mounting member (810) and the second mounting member (820) has a mounting flange (840) protruding from its outer wall, and the mounting flange (840) is detachably connected to the housing (610) via a first connector.

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