Medical microorganism virus detection device and method

Abstract

The application relates to the technical field of microorganism detection, in particular to a medical microorganism virus detection device which comprises a base, further comprises a mounting unit, the mounting unit comprises mounting seats arranged in an array on the base, the middle part of each mounting seat is provided with a suction channel, the middle part of the suction channel is provided with an adjusting piece, a connecting piece is connected with the mounting seat at one end and connected with a filtering unit at the other end, a chamber is arranged in the interior of the mounting seat and communicates with the adjusting piece through a connecting hole, a moving piece is arranged in the middle part of the chamber and can vertically displace along the chamber, the cross section of the suction channel is dynamically adjusted by regulating the moving piece, the challenge of suction filtration of different viscosity samples is effectively coped with, the cross section of the channel is increased and the filter membrane is periodically pushed for high-viscosity samples, the flow is improved and the channel is prevented from being blocked, the cross section of the channel is reduced and the filter membrane is caused to be concave for low-viscosity samples, the filtering resistance is increased, the microorganism loss is reduced, and the detection accuracy is ensured.

Description

Technical Field

[0001] This invention relates to the field of microbial detection technology, and in particular to a medical microbial virus detection device and method. Background Technology

[0002] A microbial limit analyzer is a tool specifically designed for the detection of microbial content. Its operating mechanism involves injecting the sample into a filtration unit, followed by vacuum filtration using a negative pressure generator. During this process, the pressure difference across the microporous membrane forces the sample to penetrate the membrane, while the microorganisms within the sample are effectively trapped on the membrane surface. Subsequently, a specialized membrane removal device is used to remove the membrane and transfer it to a pre-prepared solid culture medium for incubation, ultimately enabling qualitative or quantitative analysis of the microorganisms.

[0003] In existing technologies, filter membranes need to be pre-wetted in purified water to enhance their adhesion before use, and then placed on top of the filter using tweezers. However, the pre-wetted filter membrane adheres tightly to the filter due to its enhanced adhesion, and once the filter membrane is misplaced, subsequent adjustments become extremely difficult, which may hinder the smooth execution of the detection process.

[0004] Chinese patent application number CN202310763207.3 discloses a microbial limit detector, including a detector body. Multiple sets of connecting blocks are fixedly connected to the top of the detector body. Each connecting block has a filter head threadedly connected to its top. A circular groove is formed on the top of the filter head, and multiple sets of mounting grooves are formed inside the filter head. An mounting tube is fixedly connected to the bottom of each mounting groove, and a moving rod is slidably installed inside each mounting tube. The moving rod moves upward under the action of a first spring, positioning the filter screen above the circular groove without contacting the end face of the circular groove. The operator first places the impregnated filter membrane on top of the filter screen. Since the diameter of the filter screen is smaller than the diameter of the filter membrane, the edge of the filter membrane will be suspended after being placed on top of the filter screen. Therefore, if there is a deviation in the position when placing the filter membrane, the operator can easily adjust the position of the filter membrane by grasping its edge with tweezers.

[0005] Although the aforementioned patented design employs a first spring mechanism, ensuring the filter membrane edge is suspended in a non-contact state when placed on top of the filter screen, facilitating operator adjustment of the membrane position, in practical applications, the viscosity difference between the samples becomes a key factor affecting filtration efficiency during the suction process with a constant negative pressure value generated by the negative pressure generator. Specifically, high-viscosity samples, due to their limited flowability, easily accumulate on the filter membrane surface, forming viscous residues. This not only reduces filtration efficiency but can also lead to complete clogging of the filter membrane in severe cases. Conversely, low-viscosity samples, due to their high flowability, may allow microorganisms to be carried away by the high-speed fluid flow through the filter membrane or washed away, resulting in false negatives in the test results, i.e., failure to accurately capture the presence of all microorganisms.

[0006] Therefore, given the current limitations of microbial detection, developing a medical microbial virus detection device and method is particularly urgent and important for promoting the development of related technologies. Summary of the Invention

[0007] The purpose of this invention is to provide a medical microbial virus detection device and method to solve the technical problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A medical microbial virus detection device, including a base;

[0010] It also includes an installation unit, which includes mounting seats arranged in an array on a base, each mounting seat having a pull-out channel in the middle, and an adjustment element in the middle of the pull-out channel;

[0011] The connector has one end connected to the mounting base and the other end connected to the filter unit;

[0012] The chamber is located inside the mounting base and is connected to the adjusting component through a connecting hole;

[0013] A movable component is located in the middle of the chamber and can be vertically displaced along the chamber. During the vertical displacement of the movable component within the chamber, the cross-section of the adjusting component undergoes corresponding deformation. This deformation is directly used to adjust and change the cross-sectional diameter of the extraction channel.

[0014] Preferably, the docking component includes:

[0015] The connector has one end connected to the mounting base and the other end connected to the filter unit through a positioning groove, the positioning groove being equipped with a filter screen.

[0016] The support member is arranged in an array on the positioning groove and supports the central area of ​​the filter element. A guide part is provided below it. After the connector is docked with the mounting base, the chamber is connected to the support member through the guide part.

[0017] Preferably, the moving part includes:

[0018] A movable plate, its sealed sliding arrangement is located inside the chamber;

[0019] The elastic element has one end connected to the movable plate and the other end connected to the connecting plate connected to the mounting base;

[0020] The electromagnetic component, located inside the base, adjusts the diameter of the extraction channel cross-section by electromagnetically tractioning the moving plate.

[0021] Preferably, the conductive part includes:

[0022] The conductive channels are arranged in an array inside the connector and correspond to the location of the support part;

[0023] The ring channel is located at the bottom of the connector and is connected to the conductive channel;

[0024] Through holes are arrayed on the top of the mounting base. After the connector is connected to the mounting base, the annular channel is connected to the chamber through the through holes.

[0025] Preferably, the filter element includes a support portion, a connecting portion, and a filtering portion arranged sequentially from the outside to the inside. The support portion is adapted to the positioning groove, and the bottom surface of the filtering portion is in contact with the support member.

[0026] Preferably, the filtering unit includes:

[0027] Filter cloth, which is placed above the filter screen, is used to filter microorganisms;

[0028] The sample tube is located above the filter cloth, and its outer side is provided with a connector for connecting to the connector. Its top is provided with a cap.

[0029] Preferably, the filter cloth includes an elastic ring and a filter membrane disposed in the middle of the elastic ring, the filter membrane being used to filter microorganisms.

[0030] Preferably, the mounting base has a mating block on its top and a sealing ring on its outer side.

[0031] Preferably, the base has an internal suction main pipe, and the periphery of the suction main pipe is provided with a branch pipe connected to the mounting base, and the branch pipe is provided with a manual valve;

[0032] The end of the suction manifold is provided with a liquid outlet, and the outside of the base is provided with a suction port, which is connected to the negative pressure source built into the base.

[0033] A detection method for detecting samples using a medical microbial virus detection device, the detection method comprising the following steps:

[0034] S1. When the filter unit and the installation unit are connected, the negative pressure source performs suction operation on the sample to be tested in the filter unit and determines whether the sample flow rate through the filter cloth during suction is within the set value.

[0035] S2. When the sample flow rate exceeds the set value, drive the moving plate to move to the second position to reduce the cross-sectional area of ​​the extraction channel, reduce the suction force of the negative pressure on the sample to be tested, and slow down the subsequent flow rate of the sample to be tested.

[0036] S3. When the sample flow rate is less than the set value, the moving plate is driven to reciprocate from the first position to the third position, so as to realize the reciprocating change of the cross-sectional area of ​​the extraction channel, increase the suction force of the negative pressure on the sample to be tested, and increase the subsequent flow rate of the sample to be tested.

[0037] The technical effects and advantages of this invention are as follows:

[0038] 1. This invention proposes a medical microbial virus detection device. Through the cooperation of an internal chamber in the mounting base and an adjusting component in the extraction channel, the cross-sectional diameter of the extraction channel can be dynamically adjusted. When dealing with high-viscosity samples, the device uses an electromagnetic component to control the vertical displacement of a moving component within the chamber, thereby adjusting the cross-sectional size of the extraction channel. Simultaneously, it periodically pushes the filter section, causing the filter membrane to form an arched structure, increasing the effective filtration area, optimizing liquid distribution, and improving throughput. This mechanism not only effectively solves the problem of high-viscosity samples easily accumulating and forming viscous residues on the filter membrane surface, but also avoids damage to the filter membrane due to continuous high-load suction, significantly improving filtration efficiency and detection accuracy.

[0039] 2. This invention uses electromagnetic components to control the downward movement of the moving part. As the moving part moves downward, the cross-section of the extraction channel shrinks, reducing the suction efficiency of the negative pressure source and decreasing the sample flow rate out of the filter membrane. Simultaneously, the support component contracts, and the filtration section gradually shifts downward due to the elasticity of the connecting parts and the weight of the sample itself, causing the filter membrane to form a concave structure. This concave shape increases resistance during the filtration process and reduces the effective filtration area, thereby effectively reducing the risk of microorganisms penetrating the filter membrane with high-speed fluid or being washed away by the fluid. This improvement not only enhances the detection accuracy of low-viscosity samples but also further strengthens the device's adaptability to samples of different viscosities. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the main structure of the detection device of the present invention;

[0041] Figure 2 This is a schematic diagram showing the disassembled structure of the installation unit and the filter unit of the present invention;

[0042] Figure 3 This is another perspective schematic diagram of the disassembly structure of the installation unit and the filter unit of the present invention;

[0043] Figure 4 For the present invention Figure 2 Enlarged structural diagram of the structure at point A;

[0044] Figure 5 For the present invention Figure 3 Enlarged structural diagram of the structure at point B in the middle;

[0045] Figure 6 This is a schematic diagram of the disassembled structure of the filter unit of the present invention;

[0046] Figure 7 This is another perspective schematic diagram of the disassembled structure of the filter unit of the present invention;

[0047] Figure 8 This is a schematic diagram of the structure of the connector of the present invention;

[0048] Figure 9 This is a schematic diagram of the structure of the filter element of the present invention;

[0049] Figure 10 This is a schematic cross-sectional view of the mounting unit and the filtering unit of the present invention;

[0050] Figure 11 This is a schematic diagram of the detection process of the detection device of the present invention.

[0051] The attached figures are labeled as follows:

[0052] 1. Base;

[0053] 2. Mounting unit; 201. Mounting base; 202. Extraction channel; 203. Adjustment component; 204. Connection hole;

[0054] 3. Chamber;

[0055] 4. Moving parts; 401. Moving plate; 402. Elastic parts;

[0056] 5. Connecting parts; 501. Connecting joint; 502. Positioning groove; 503. Supporting parts; 504. Connecting block; 505. Sealing ring

[0057] 6. Conductive section; 601. Conductive channel; 602. Circular channel; 603. Through hole;

[0058] 7. Filter screen component; 701. Support part; 702. Connecting part; 703. Filtering part;

[0059] 8. Filter unit; 801. Filter cloth; 8011. Elastic ring; 8012. Filter membrane; 802. Sample cylinder; 803. Connector; 804. Cover;

[0060] 9. Manual valve;

[0061] 10. Liquid outlet;

[0062] 11. Suction port. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] Example 1

[0065] Reference Figures 1 to 10 As shown, the present invention proposes a medical microbial virus detection device, including a base 1, a suction main tube inside the base 1, a branch tube connected to the mounting base 201 on the periphery of the suction main tube, and a manual valve 9 on the branch tube; rotating the manual valve 9 realizes the opening and closing of the branch tube.

[0066] Reference Figure 1 As shown, the end of the suction main pipe is provided with a liquid outlet 10, and the outer side of the base 1 is provided with a suction port 11, which is connected to the negative pressure source built into the base 1. The liquid outlet 10 is connected to a collection bottle through a hose, and the collection bottle is connected to the suction port 11 through a connecting pipe.

[0067] The base 1 is provided with an installation unit 2, which includes an array of mounting seats 201 arranged on the base 1. Each mounting seat 201 has an extraction channel 202 in the middle. The sample to be tested enters the suction main tube through the extraction channel 202 and the branch tube.

[0068] Reference Figures 1 to 8 As shown, the mounting base 201 is provided with a docking part 5, and is connected to the filter unit 8 through the docking part 5.

[0069] The docking component 5 includes a connector 501, one end of which is connected to the mounting base 201, and the other end is connected to the filter unit 8 through a positioning groove 502. The positioning groove 502 is provided with a filter screen 7.

[0070] The top of the mounting base 201 is provided with a mating block 504, and a sealing ring 505 is provided on the outer side of the mating block 504. The end of the mating joint 501 connected to the mounting base 201 is provided with a mating groove, the size of which is adapted to the mating block 504.

[0071] Reference Figures 6 to 10 As shown, the filtration unit 8 includes a filter cloth 801, which is disposed above the filter screen 7 and is used to filter microorganisms in the sample.

[0072] It also includes a sample tube 802, which is located above the filter cloth 801, with a connector 803 on its outer side that connects to the connector 501, and a cover 804 on its top.

[0073] During application, the first step is to perform threaded assembly of the connector 501 and the mounting base 201 to ensure that the mating block 504 is precisely embedded in the mating groove of the connector 501. This process causes the sealing ring 505 to be compressed, thereby achieving a tight seal between the connector 501 and the mounting base 201.

[0074] Subsequently, the filter element 7 is placed in the positioning groove 502. The conical structure designed at the bottom of the positioning groove 502 naturally forms a gap between the filter element 7 and the groove wall. This gap facilitates the smooth flow of the test sample into the pre-set channel of the connector 501 through the conical area. This channel is directly connected to the extraction channel 202.

[0075] Next, filter cloth 801 is laid on top of filter screen 7, and sample cylinder 802 is placed on the surface of filter cloth 801. After the sample cylinder 802 is positioned, it is securely connected to connector 501 using connector 803. Then, the sample to be tested is poured into sample cylinder 802, and the cap 804 is fastened to seal it, in preparation for vacuum filtration.

[0076] By rotating the manual valve 9, the branch pipe is connected to the main suction pipe, and then the negative pressure source device (e.g., a vacuum pump) is activated. The negative pressure source performs a filtration operation on the sample in the sample cylinder 802 through the main suction pipe. During filtration, microorganisms in the sample are trapped on the filter cloth 801, while the filtrate passes through the filter cloth 801, flows through the extraction channel 202 and the branch pipe into the main suction pipe, and finally enters the collection container through the outlet 10. At the same time, the top of the collection container is connected to the suction port 11 through a connecting pipe, effectively preventing the sample from flowing back to the suction port 11 during the suction process.

[0077] After filtration, disconnect the filter unit 8 from the mounting unit 2, carefully remove the filter cloth 801 using tweezers, and transfer it to the surface of a pre-prepared culture medium for incubation. After incubation, use a colony counter to accurately count the colonies on the culture medium.

[0078] Special note: For bacterial culture, tryptic soy agar medium should be used; while for molds and yeasts, Sabouraud dextrose agar medium should be used.

[0079] Example 2

[0080] While the above embodiments can achieve the filtration of test samples, in practical applications, the viscosity difference between test samples becomes a key factor affecting the filtration effect during the suction process with a constant negative pressure source. Specifically, high-viscosity samples, due to their limited flowability, easily accumulate viscous residues on the surface of the filter membrane 8012, which not only reduces filtration efficiency but may also lead to complete clogging of the filter membrane 8012 in severe cases. Therefore, a technical improvement is made based on Embodiment 1, and the improved technical solution is shown below.

[0081] Reference Figures 1 to 10 As shown, the present invention proposes a medical microbial virus detection device, wherein the mounting base 201 has a chamber 3 inside, and the chamber 3 is connected to the adjusting member 203 in the extraction channel 202 through the connecting hole 204.

[0082] A movable member 4 is provided in the middle of the chamber 3. The movable member 4 can be vertically displaced along the chamber 3. During the vertical displacement of the movable member 4 in the chamber 3, the cross-section of the adjusting member 203 undergoes corresponding deformation. This deformation is directly used to adjust and change the cross-sectional diameter of the extraction channel 202.

[0083] The movable component 4 includes a movable plate 401, which is sealed and slidably disposed inside the chamber 3.

[0084] The elastic element 402 has one end connected to the movable plate 401 and the other end connected to the connecting plate connected to the mounting base 201.

[0085] An electromagnetic component, located inside the base 1, adjusts the cross-sectional diameter of the extraction channel 202 by electromagnetically tractioning the movable plate 401. The movable plate 401 contains a magnetic component; the amount of movement of the movable plate 401 is adjusted by regulating the current flowing through the electromagnetic component.

[0086] The positioning groove 502 is arrayed with support members 503, which support the middle area of ​​the filter screen 7. The support members 503 are provided with a guide part 6 below the support members 503. After the connector 501 is docked with the mounting base 201, the chamber 3 is connected to the support members 503 through the guide part 6.

[0087] The conductive part 6 includes a conductive channel 601, which is arranged in an array inside the connector 501 and corresponds to the position of the support member 503.

[0088] The ring channel 602 is located at the bottom of the connector 501 and is connected to the conduction channel 601.

[0089] Through holes 603 are arrayed on the top of the mounting base 201. After the connector 501 is connected to the mounting base 201, the annular channel 602 is connected to the chamber 3 through the through holes 603.

[0090] The filter element 7 includes a support part 701, a connecting part 702 and a filtering part 703 arranged sequentially from the outside to the inside. The support part 701 is adapted to the positioning groove 502, and the bottom surface of the filtering part 703 is in contact with the support member 503.

[0091] The filter cloth 801 includes an elastic ring 8011 and a filter membrane 8012 disposed in the middle of the elastic ring 8011. The filter membrane 8012 is used to filter microorganisms.

[0092] In this implementation case, each branch pipe on the main suction pipe is equipped with a flow monitoring component, the core of which is a flow sensor.

[0093] In this embodiment, during use, the flow monitoring component is responsible for measuring the flow rate of the sample to be tested through the branch pipe, and then evaluating whether the viscosity of the sample in the sample cylinder 802 matches the suction force applied by the negative pressure source.

[0094] If the flow rate of the sample to be tested recorded by the flow monitoring component reaches the preset standard, it means that the sample viscosity in the sample tube 802 is coordinated with the suction force of the negative pressure source. At this time, the sample can pass smoothly through the filter membrane 8012, and the filter membrane 8012 can effectively trap microorganisms in the sample.

[0095] Conversely, if the monitored flow rate is lower than the preset value, it indicates that the sample viscosity is not proportional to the negative pressure suction force, the sample viscosity is too high, the flow is obstructed, the pores of the 8012 filter membrane are easily blocked, resulting in a decrease in flow rate.

[0096] In cases where the sample viscosity is too high, the moving part 4 is controlled by an electromagnetic component to reciprocate between a first position and a third position (the third position is higher than the first position), thereby adjusting the cross-sectional size of the extraction channel 202 and causing the support part 503 to periodically push the filter part 703.

[0097] The specific control mechanism is as follows:

[0098] When a high-viscosity sample is detected, a corresponding periodically changing positive current is supplied to the electromagnetic element based on the value of the flow monitoring component. This generates a repulsive force that drives the moving plate 401 to move between designated positions. When the moving plate 401 moves upward, a negative pressure is formed below it, causing the adjusting component 203 to contract and the cross-section of the extraction channel 202 to expand, enhancing the suction efficiency of the negative pressure source and increasing the flow rate of the sample out of the filter membrane 8012. At the same time, a positive pressure is formed above the moving plate 401, which acts on the supporting component 503 through the conducting part 6, causing it to expand and push against the filtering part 703, so that the filter membrane 8012 forms an arched structure, increasing the effective filtration area, optimizing liquid distribution, and improving throughput.

[0099] It is worth noting that the connecting part 702 between the support part 701 and the filter part 703 is a rubber elastic sheet, which allows the filter part 703 to move slightly when the support member 503 pushes the filter part 703.

[0100] When the moving plate 401 moves downward, the support 503 contracts, and the filter section 703 and filter membrane 8012 return to flatness; the adjusting component 203 expands, the cross section of the extraction channel 202 returns to its initial state, and the sample flow rate returns to its original state.

[0101] This reciprocating motion mechanism not only causes the cross-section of the extraction channel 202 to change periodically, enhancing the intermittent suction force of the negative pressure source and increasing the sample flow rate, but also prevents the filter membrane 8012 from being damaged due to continuous high-load suction.

[0102] Meanwhile, the reciprocating pushing of the support 503 against the filter 703 not only further increases the sample flow rate, but also clears the pores on the filter membrane 8012 blocked by the high-viscosity sample through vibration.

[0103] Example 3

[0104] While the above embodiments can improve the flowability of high-viscosity samples, when dealing with low-viscosity samples, due to their high flowability, microorganisms may be carried away by the high-speed fluid flow through the filter membrane 8012 or washed away, leading to false negatives in the test results, i.e., failure to accurately capture the presence of all microorganisms. Therefore, technical improvements are made based on Embodiment 2.

[0105] If the flow rate detected by the flow monitoring component is higher than the preset value, it indicates that the sample viscosity is not proportional to the negative pressure suction force, the sample viscosity is too low, the liquid flow rate is fast, resulting in an increase in flow rate.

[0106] In cases where the sample viscosity is too low, the moving part 4 is moved from the first position to the second position (the second position is lower than the first position) by electromagnetic control, thereby adjusting the cross-sectional size of the extraction channel 202 and reducing the supporting effect of the support part 503 on the filter part 703.

[0107] The specific control mechanism is as follows:

[0108] When a low-viscosity sample is detected, a corresponding reverse current is supplied to the electromagnetic element according to the value of the flow monitoring component, which generates a suction force to drive the moving plate 401 to move from the first position to the second position.

[0109] When the moving plate 401 moves downward, a positive pressure is formed below it, causing the adjusting component 203 to expand and the cross-section of the extraction channel 202 to shrink, reducing the suction efficiency of the negative pressure source and decreasing the sample flow rate out of the filter membrane 8012. Simultaneously, a negative pressure is formed above the moving plate 401, which acts on the supporting component 503 through the conducting part 6, causing it to contract. After the filtering part 703 loses the support of the supporting component 503, it gradually shifts downward due to the elasticity of the connecting part 702 and the weight of the sample itself, causing the filter membrane 8012 to form a concave structure. This concave shape of the filter membrane 8012 causes the sample to accumulate in the center, forming a localized high-pressure area and increasing resistance during filtration. Furthermore, liquid retention at the edges of the concave area may also reduce the effective filtration area. By increasing filtration resistance and reducing the effective filtration area, the risk of microorganisms penetrating the filter membrane 8012 with the high-speed fluid or being washed away by the fluid is effectively reduced.

[0110] Example 4

[0111] Reference Figure 11 As shown, the present invention also provides a detection method for detecting samples using a medical microbial virus detection device, the detection method comprising the following steps:

[0112] S1. When the filter unit 8 and the installation unit 2 are connected, the negative pressure source performs suction operation on the sample to be tested in the filter unit 8 and determines whether the sample flow rate through the filter cloth 801 during suction is at the set value.

[0113] S2. When the sample flow rate exceeds the set value, drive the moving plate 401 to move to the second position, thereby reducing the cross-sectional area of ​​the extraction channel 202, reducing the suction force of the negative pressure on the sample to be tested, and slowing down the subsequent flow rate of the sample to be tested.

[0114] S3. When the sample flow rate is less than the set value, the moving plate 401 is driven to reciprocate from the first position to the third position, so as to realize the reciprocating change of the cross-sectional area of ​​the extraction channel 202, increase the suction force of the negative pressure on the sample to be tested, and increase the subsequent flow rate of the sample to be tested.

[0115] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A medical microbial virus detection device, comprising a base, characterized in that, Also includes: The mounting unit includes mounting seats arranged in an array on a base, each mounting seat having a pull-out channel in the center, and an adjustment element in the center of each pull-out channel; The connector has one end connected to the mounting base and the other end connected to the filter unit; The chamber is located inside the mounting base and is connected to the adjusting component through a connecting hole; A movable component is located in the middle of the chamber and can be vertically displaced along the chamber. During the vertical displacement of the movable component in the chamber, the cross-section of the adjusting component undergoes corresponding deformation. This deformation is directly used to adjust and change the cross-sectional diameter of the extraction channel. The docking component includes: a connector, one end of which is connected to the mounting base, and the other end is connected to the filter unit through a positioning groove, wherein a filter screen is provided inside the positioning groove; The support member is arranged in an array on the positioning groove and supports the central area of ​​the filter element. A guide part is provided below it. After the connector is docked with the mounting base, the chamber is connected to the support member through the guide part. The movable component includes: a movable plate, which is slidably and sealed inside the cavity; The elastic element has one end connected to the movable plate and the other end connected to the connecting plate connected to the mounting base; The electromagnetic component, located inside the base, adjusts the diameter of the extraction channel cross-section by electromagnetically tractioning the moving plate. The conductive part includes: a conductive channel, which is arranged in an array inside the connector and corresponds to the position of the support member; The ring channel is located at the bottom of the connector and is connected to the conductive channel; Through holes are arrayed on the top of the mounting base. After the connector is connected to the mounting base, the annular channel is connected to the chamber through the through holes.

2. The medical microbial virus detection device according to claim 1, characterized in that, The filter element includes a support part, a connecting part, and a filtering part arranged sequentially from the outside to the inside. The support part is adapted to the positioning groove, and the bottom surface of the filtering part is in contact with the support member.

3. The medical microbial virus detection device according to claim 2, characterized in that, The filtering unit includes: Filter cloth, which is placed above the filter screen, is used to filter microorganisms; The sample tube is located above the filter cloth, and its outer side is provided with a connector for connecting to the connector. Its top is provided with a cap.

4. The medical microbial virus detection device according to claim 3, characterized in that, The filter cloth includes an elastic ring and a filter membrane disposed in the middle of the elastic ring, the filter membrane being used to filter microorganisms.

5. The medical microbial virus detection device according to claim 2, characterized in that, The mounting base has a mating block on its top, and a sealing ring on the outside of the mating block.

6. The medical microbial virus detection device according to claim 1, characterized in that, The base has an internal suction main pipe, and the periphery of the suction main pipe is provided with a branch pipe connected to the mounting base. The branch pipe is provided with a manual valve. The end of the suction manifold is provided with a liquid outlet, and the outside of the base is provided with a suction port, which is connected to the negative pressure source built into the base.

7. A detection method for detecting samples using the medical microbial virus detection device as described in any one of claims 1-6, characterized in that, The detection method includes the following steps: S1. When the filter unit and the installation unit are connected, the negative pressure source performs suction operation on the sample to be tested in the filter unit and determines whether the sample flow rate through the filter cloth during suction is within the set value. S2. When the sample flow rate exceeds the set value, drive the moving plate to move to the second position to reduce the cross-sectional area of ​​the extraction channel, reduce the suction force of the negative pressure on the sample to be tested, and slow down the subsequent flow rate of the sample to be tested. S3. When the sample flow rate is less than the set value, the moving plate is driven to reciprocate from the first position to the third position, so as to realize the reciprocating change of the cross-sectional area of ​​the extraction channel, increase the suction force of the negative pressure on the sample to be tested, and increase the subsequent flow rate of the sample to be tested.

Images