Filter status detection system and detection method

Abstract

The embodiment of the present application discloses a filter status detection system and detection method, which are used to detect whether the filter is clogged. The detection system of the embodiment of the present application includes a first filter, a pressure sensing device and a first liquid driving device, a line switching switch and a syringe, the first liquid driving device is connected to the first filter, the syringe is connected to the sample needle, and the pressure sensing device is installed on the pipeline between the syringe and the sample needle. The detection system is also provided with a branch, the liquid outlet end of the line switching switch is connected to the liquid inlet end of the first filter, and the detection system can form a first passage. When the first liquid driving device is turned on, the pressure sensing device can sense the pressure of the liquid flow. If the first filter is clogged, the value of the pressure is not within the preset value range. Therefore, judging the blockage of the filter by the numerical change of the pressure can accurately and intuitively find the blockage of the filter.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical devices, and specifically to a filter status detection system and method. Background Art

[0002] The in vitro diagnostic analyzer includes a sample needle and a syringe, wherein the sample needle is used to absorb the sample to be tested and spit out the sample, and the syringe is used to control the sample needle to quantitatively absorb and spit out the sample. When the sample needle absorbs the sample in the capped sample tube, the sample needle punctures the test tube cap of the capped sample tube, so that the needle tip passes through the test tube cap and immerses into the sample, and the syringe controls the sample needle to absorb the sample; after the sample needle moves to the sample adding position, the syringe controls the sample needle to spit out the sample, thereby completing the sample needle adding process.

[0003] After the sample is added, the inner and outer walls of the sample needle need to be cleaned with a cleaning liquid in order to wash away the debris generated when the sample needle punctures the test tube cap, and at the same time, to avoid cross contamination between samples when different samples are drawn. Therefore, the cleaning waste liquid contains debris and impurities remaining in the sample. After cleaning, the cleaning waste liquid is pumped to the waste liquid bucket or the waste liquid direct discharge channel using a waste liquid pump to discharge the cleaning waste liquid.

[0004] In order to prevent debris and sample impurities in the cleaning waste liquid from being retained in the waste liquid pump when the cleaning waste liquid flows through the waste liquid pump, thereby damaging the waste liquid pump, a filter needs to be added at the front end of the waste liquid pump. The cleaning waste liquid needs to be filtered through the filter first to remove the debris and sample impurities. The filtered cleaning waste liquid then flows through the waste liquid pump and is pumped into the waste liquid barrel. After the filter has been used for a period of time, since the filter will continuously accumulate debris and sample impurities in the process of filtering the cleaning waste liquid, over time, the accumulated debris and sample impurities will clog the filter screen of the filter, resulting in unsmooth discharge of the cleaning waste liquid. At this time, a new filter needs to be replaced to better filter the cleaning waste liquid.

[0005] However, when checking whether the filter is clogged, technicians only rely on visual observation. Due to the dense surface structure of the filter, it is difficult to detect the blockage of the filter with the naked eye, so it is impossible to accurately judge whether the filter is clogged, and it is also impossible to accurately judge whether the filter should be replaced to ensure smooth discharge of the cleaning waste liquid. Summary of the invention

[0006] The embodiments of the present application provide a filter status detection system and a filter status detection method for detecting whether the filter is clogged.

[0007] A first aspect of an embodiment of the present application provides a filter status detection system, the detection system comprising a first filter, a pressure sensing device and a first liquid driving device, the first liquid driving device being connected to the first filter via a pipeline;

[0008] The detection system also includes a line switch and a syringe, the syringe is connected to the sample needle through a pipeline, and the pressure sensing device is installed on the pipeline between the syringe and the sample needle;

[0009] The detection system is also provided with a branch, one end of which is connected to the pipeline between the syringe and the pressure sensing device, and the other end is connected to the liquid inlet end of the line switching switch, and the liquid outlet end of the line switching switch is connected to the liquid inlet end of the first filter;

[0010] The first liquid driving device is installed on the liquid outlet side of the first filter, and the sample needle, the pressure sensing device, the branch, the line switching switch, the first filter and the first liquid driving device form a first passage. The first liquid driving device is used to drive the liquid flow in the first passage, and the pressure sensing device is used to detect the pressure of the liquid flow in the first passage, so as to determine whether the first filter is blocked according to the detected pressure.

[0011] A second aspect of the embodiment of the present application provides a filter status detection system, the detection system comprising a first liquid driving device and a second liquid driving device, a first filter, and a first pressure sensing device;

[0012] The first pressure sensing device is connected to the first filter through a pipeline, the first liquid driving device is connected to the liquid outlet end of the first filter through a pipeline, the liquid inlet end of the second liquid driving device is connected to the liquid container through a pipeline, and the liquid outlet end of the second liquid driving device is connected to the liquid inlet end of the first filter;

[0013] The second liquid driving device, the first filter, the first pressure sensing device and the first liquid driving device form a first passage, the second liquid driving device is used to draw liquid from the liquid container into the first passage, the first liquid driving device and the second liquid driving device are used to drive the liquid flow in the first passage, and the first pressure sensing device is used to detect the pressure of the liquid flow in the first passage to determine whether the first filter is blocked based on the detected pressure.

[0014] A third aspect of the embodiments of the present application provides a method for detecting a filter state, the method being applied to the filter state detection system of the first aspect, the method comprising:

[0015] Switching the circuit switch so that the sample needle, the pressure sensing device, the circuit switch, the first filter and the first liquid driving device form a first passage;

[0016] Turning on the first liquid driving device to drive the liquid in the first passage to flow through the first filter;

[0017] The pressure sensing device senses a first pressure of the liquid flowing in the pipeline.

[0018] A fourth aspect of the embodiments of the present application provides a method for detecting a filter state, the method being applied to the filter state detection system of the second aspect, the method comprising:

[0019] Turning on the first liquid driving device;

[0020] Turning on the second liquid driving device for a preset time to extract liquid from the liquid container and drive the liquid to flow in the first passage;

[0021] A first pressure sensing device senses a first pressure of the liquid flowing in the pipeline.

[0022] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0023] The detection system of the filter state of the embodiment of the present application includes a first filter, a pressure sensing device and a first liquid driving device, wherein the first liquid driving device is connected to the first filter through a pipeline, the detection system also includes a line switching switch and a syringe, the syringe is connected to the sample needle through a pipeline, and the pressure sensing device is installed on the pipeline between the syringe and the sample needle. The detection system is also provided with a branch, one end of the branch is connected to the pipeline between the syringe and the pressure sensing device, and the other end is connected to the liquid inlet end of the line switching switch, the liquid outlet end of the line switching switch is connected to the liquid inlet end of the first filter, and the first liquid driving device is installed on the liquid outlet side of the first filter, so that the sample needle, the pressure sensing device, the branch, the line switching switch, the first filter and the first liquid driving device can form a first passage, and the first liquid driving device can drive the liquid in the first passage to flow. When the first liquid driving device is turned on to drive the liquid in the first passage to flow through the first filter, the pressure sensing device can sense the pressure of the liquid flow in the pipeline where it is located. If the first filter is blocked, the value of the pressure is not within the pressure value range corresponding to the normal use of the filter; if the value of the pressure is within the pressure value range, it indicates that the first filter is not blocked and can be used normally. Therefore, the embodiment of the present application determines the filter blockage condition by the numerical change of the pressure, which can accurately and intuitively detect the filter blockage condition compared with the method of observing the filter blockage condition with the naked eye. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural schematic diagram of a filter status detection system in an embodiment of the present application;

[0025] Figure 2 This is another structural schematic diagram of the filter status detection system in the embodiment of the present application;

[0026] Figure 3 This is another structural schematic diagram of the filter status detection system in the embodiment of the present application;

[0027] Figure 4 This is another structural schematic diagram of the filter status detection system in the embodiment of the present application;

[0028] Figure 5 A flow chart of a method for detecting a filter status in an embodiment of the present application;

[0029] Figure 6 Schematic diagram of another flow chart of the method for detecting the filter status in the embodiment of the present application. DETAILED DESCRIPTION

[0030] The embodiments of the present application provide a filter status detection system and a filter status detection method for detecting whether the filter is clogged.

[0031] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] See also Figure 1 In one embodiment of the filter status detection system of the present application, one embodiment includes:

[0033] A first filter 101, a pressure sensing device 102, a first liquid driving device 103, a line switching switch 104 and a syringe 105, wherein the first liquid driving device 103 is connected to the first filter 101 through a pipeline, and the first liquid driving device 103 refers to a device that provides power for the flow of liquid based on the principle of atmospheric pressure difference, and is used to drive the liquid to flow.

[0034] The detection system of this embodiment can be used to detect the state of the filter, that is, it can be used to detect whether the filter screen of the filter is blocked. In addition, when the experimenter is conducting a biochemical analysis experiment, the detection system of this embodiment can also be used to absorb the sample to be detected, and to punch the sample onto the sample adding position, that is, to absorb and spit out the sample. In this embodiment, when the detection system absorbs and spits out the sample, the sample needle 106 can be connected to the detection system, and the sample needle is used to absorb and spits out the sample. Specifically, the sample needle 106 is connected to the syringe 105 through a pipeline, and the syringe 105 provides the sample needle 106 with a force for absorbing and spits out the sample, and controls the sample needle 106 to absorb and spits out the sample quantitatively. After completing the work of absorbing and spits out the sample, the detection system can also be used to clean the sample needle to wash away the sample residual impurities attached to the sample needle and the debris generated when the sample needle punctures the capped sample tube.

[0035] In this embodiment, the pressure sensing device 102 is installed on the pipeline between the syringe 105 and the sample needle 106. The pressure sensing device 102 is a device having a force-sensitive element and capable of sensing the flow pressure of the liquid in the pipeline.

[0036] The detection system is also provided with a branch 107, one end of the branch 107 is connected to the pipeline between the syringe 105 and the pressure sensing device 102, and the other end is connected to the liquid inlet end of the line switching switch 104. The liquid outlet end of the line switching switch 104 is connected to the liquid inlet end of the first filter 101. The liquid inlet end is the end where the liquid flows into the first filter 101. Correspondingly, the end where the filtered liquid flows out of the first filter 101 is called the liquid outlet end.

[0037] In this embodiment, the line switch 104 is used to switch the connection state of the line. When the line switch 104 is switched, a line of the detection system can be switched to a connection state, or a line can be switched to a disconnection state.

[0038] The first liquid driving device 103 is installed on the liquid outlet side of the first filter 101 , that is, connected to the liquid outlet end of the first filter 101 .

[0039] When the detection system uses the sample needle 106 to aspirate and spit out samples, the sample needle 106 is connected to the pressure sensing device 102 through a pipeline to be connected to the detection system. Then, the sample needle 106, the pressure sensing device 102, the branch 107, the line switching switch 104, the first filter 101 and the first liquid driving device 103 can form a first passage, and the first liquid driving device 103 can drive the liquid in the first passage to flow.

[0040] Therefore, when the liquid in the first passage flows, the pressure sensing device 102 can sense and detect the pressure of the liquid flowing in the first passage in real time.

[0041] In practical applications, the first passage of the detection system may store liquid. After the first liquid driving device 103 is turned on, the liquid in the first passage flows along the first passage to the first filter 101 under the action of the atmospheric pressure difference. In this process, the pressure sensing device 102 senses the pressure of the liquid flow. If the sensed pressure is not within the pressure value range corresponding to the normal use of the filter, it indicates that the first filter 101 is clogged; if the value of the flow pressure is within the pressure value range, it indicates that the first filter 101 is not clogged and can be used normally. Among them, the pressure value range corresponding to the normal use of the filter can be obtained through experimental testing, that is, the value range of the pressure of the liquid flow corresponding to the filter in normal use state is determined through experimental testing.

[0042] Therefore, this embodiment determines the filter blockage condition by the numerical change of the flow pressure. Compared with the method of observing the filter blockage condition with the naked eye, the filter blockage condition can be accurately and intuitively found.

[0043] In this embodiment, the pressure of the liquid flow sensed by the pressure sensing device 102 may be an absolute pressure or a gauge pressure. In addition, the vacuum degree may also be used as an indicator to represent the pressure sensed by the pressure sensing device 102. The specific form of the pressure sensed by the pressure sensing device 102 is not limited.

[0044] In this embodiment, the pressure sensing device 102 may be a pressure sensor, and the pressure sensor 102 may convert the sensed pressure of the liquid flow into a signal output, and the signal carries the value of the pressure of the liquid flow. Then, the detection system receives the signal output by the pressure sensor 102 through the control device, obtains the value of the pressure of the liquid flow, and the control device processes the value of the pressure.

[0045] In this embodiment, the pressure sensing device 102 may also be a pressure gauge. When sensing the pressure of the liquid flow, the pressure gauge transmits the pressure deformation to the pointer through the elastic deformation of the force-sensitive element in the gauge, and then the conversion mechanism of the movement in the gauge causes the pointer to rotate to display the value of the pressure of the liquid flow. The pressure sensing device 102 may also be other devices with force-sensitive elements that can sense the pressure of the liquid flow in the pipeline, and the specific type is not limited.

[0046] In this embodiment, the detection system may further include: a line connection switch 108, a swab 109 and a second liquid driving device 110. The liquid outlet end of the line connection switch 108 is connected to the syringe 105 through a pipeline. The line connection switch 108 is used to control the connection state of the line. When the line connection switch 108 is closed, the line where the line connection switch 108 is located is in a connected state; when the line connection switch 108 is disconnected, the line where the line connection switch 108 is located is in a disconnected state.

[0047] The swab 109 is connected to the liquid inlet end of the line switch 104 through a pipeline. When the sample needle 106 is connected to the detection system, the swab 109 can wrap the outer wall of the sample needle 106. In this embodiment, the side wall of the sample needle 106 is provided with an opening, which is close to the needle tip of the sample needle 106, and the sample needle 106 is connected to the swab 109 through the opening.

[0048] The second liquid driving device 110 can be connected to the liquid inlet end of the line connection switch 108 through a pipeline, and connected to the liquid container through a pipeline 112. The second liquid driving device 110 refers to a device that draws liquid from the liquid container into the pipeline based on the principle of atmospheric pressure difference and can provide power for the flow of the liquid, and is used to drive the flow of the liquid.

[0049] Therefore, when the sample needle 106 is connected to the detection system, the second liquid driving device 110, the line connection switch 108, the syringe 105, the pressure sensor 102, the sample needle 106, the swab 109, the line switching switch 104, the first filter 101 and the first liquid driving device 103 can form a second passage. When the liquid container contains a cleaning liquid for cleaning the sample needle, the line connection switch 108 can be closed and the second liquid driving device 110 can be turned on. The second liquid driving device 110 extracts the cleaning liquid from the liquid container through the pipeline 112. The cleaning liquid flows in the second passage under the drive of the second liquid driving device 110 and the first liquid driving device 103. When flowing through the sample needle, the inner wall of the sample needle can be cleaned. The cleaned waste liquid flows into the first filter 101 along the liquid flow direction. The first filter 101 filters the waste liquid to remove impurities and debris in the waste liquid, and prevents the impurities and debris from being retained in the first liquid driving device 103 and damaging the first liquid driving device 103. The waste liquid from which impurities and debris are filtered out is finally discharged from the second passage and into the waste liquid barrel.

[0050] During the flow of the liquid in the second passage, the pressure sensor 102 can also continuously sense the pressure of the liquid flowing in the pipeline. During this process, the pressure sensed by the pressure sensor 102 is used to determine whether the sample needle 106 is blocked.

[0051] By adding components such as a line connection switch 108, a swab 109 and a second liquid driving device 110 to the detection system, the inner wall of the sample needle after sample aspiration can be cleaned. It can be understood that if the sample needle does not need to be cleaned, the detection system of this embodiment may not include the above-mentioned added components, and the specific details are not limited here.

[0052] In addition to the above-mentioned use of the detection system to clean the inner wall of the sample needle, the detection system can also be used to clean the outer wall of the sample needle. Specifically, a third liquid driving device 111 is added to the detection system. The third liquid driving device 111 refers to a device that extracts liquid from a liquid container into a pipeline based on the principle of atmospheric pressure difference and can provide power for the flow of liquid, and is used to drive the flow of liquid. Among them, the third liquid driving device 111 is connected to the swab 109 through a pipeline, and is connected to the liquid container through a pipeline 112. Therefore, the third liquid driving device 111, the swab 109, the line switching switch 104, the first filter 101 and the first liquid driving device 103 can form a third passage.

[0053] When the third liquid driving device 111 is turned on, the third liquid driving device 111 can draw liquid from the liquid container into the third passage through the pipeline 112, and the first liquid driving device 103 and the third liquid driving device 111 on the third passage jointly drive the liquid in the passage to flow. At the same time, since the swab 109 is wrapped around the outer wall of the sample needle 106, when the liquid flows in the third passage, the swab can clean the outer wall of the sample needle 106, and the cleaned waste liquid is filtered by the first filter 101 and discharged from the third passage, and finally discharged into the waste liquid barrel.

[0054] In actual application, if the first filter 101 is detected to be clogged, if the first filter 101 is continued to be used, the liquid will not be filtered smoothly, affecting the filtration efficiency of the liquid. The liquid may also overflow due to excessive liquid pressure, thereby causing biological contamination or damage to the equipment. Therefore, when the first filter 101 is clogged, the use of the detection system has to be stopped. In order to avoid the above situation, the present embodiment further improves the structure of the detection system. Figure 1 The detection system shown in FIG. 1 is based on the detection system shown in FIG. 1 and a filter switching switch 113 and a second filter 114 are added. For the specific structure, please refer to FIG. Figure 2 .

[0055] The liquid inlet end of the first filter 101 and the liquid inlet end of the second filter 114 are respectively connected to the liquid outlet end of the filter switching switch 113 through pipelines, and the liquid inlet end of the filter switching switch 113 is connected to the liquid outlet end of the line switching switch 104. The filter switching switch 113 can switch the liquid to flow to the first filter 101 or switch the liquid to flow to the second filter 114. The liquid outlet end of the first filter 101 and the liquid outlet end of the second filter 114 are respectively connected to the first liquid driving device 103.

[0056] Therefore, when the first filter 101 is clogged, the filter switching switch 113 can be switched to disconnect the first filter 101 from the line, and the spare second filter 114 can be connected to the line, so that the detection system has an available filter and can resume normal use.

[0057] It is understandable that the number of the second filters 114 used for backup in this embodiment can be one or more. For example, when the number of the second filters 114 is two, after the first filter 101 is clogged, the filter switching switch 113 can be switched to disconnect the first filter 101 from the line, and any one of the two second filters 114 can be connected to the line. The number of the second filters 114 is not limited.

[0058] In this embodiment, the first liquid driving device 103, the second liquid driving device 110 and the third liquid driving device 111 can be any one of a diaphragm pump, a peristaltic pump, a plunger pump or a syringe, as long as they are devices that can provide power for the flow of liquid and drive the flow of liquid, and the specific type is not limited.

[0059] The line switching switch 104, the line connection switch 108 and the filter switching switch 113 can be any one of a solenoid valve, a pressure-breaking valve, a threaded valve, and a diaphragm valve, as long as they are devices that can control the connection state of the line. For example, the line switching switch 104 can be a three-way solenoid valve, the line connection switch 108 can be a two-way solenoid valve, and the filter switching switch 113 can be a three-way solenoid valve. The specific types of the line switching switch 104, the line connection switch 108 and the filter switching switch 113 are not limited.

[0060] The present application also provides another structure of the filter status detection system. Figure 3 Another embodiment of the filter status detection system in the embodiment of the present application includes:

[0061] A first liquid driving device 301 and a second liquid driving device 302 , a first filter 303 , and a first pressure sensing device 304 .

[0062] Among them, the first pressure sensing device 304 is connected to the first filter 303 through a pipeline, the first liquid driving device 301 is connected to the liquid outlet end of the first filter 303 through a pipeline, the liquid inlet end of the second liquid driving device 302 is connected to the liquid container through a pipeline 305, and the liquid outlet end of the second liquid driving device 302 is connected to the liquid inlet end of the first filter 303.

[0063] The first liquid driving device 301 and the second liquid driving device 302 are devices that provide power for the flow of liquid based on the principle of atmospheric pressure difference, and are used to drive the liquid to flow. The second liquid driving device 302 can also draw liquid from the liquid container into the pipeline through the pipeline 305. The first pressure sensing device 304 is a device with a force-sensitive element that can sense the pressure of the liquid flowing in the pipeline.

[0064] Therefore, in the detection system of this embodiment, the second liquid driving device 302, the first filter 303, the first pressure sensing device 304 and the first liquid driving device 301 can form a first passage. When the first liquid driving device 301 and the second liquid driving device 302 are turned on, the second liquid driving device 302 can extract liquid from the liquid container through the pipeline 305 and enter the first passage. The first liquid driving device 301 and the second liquid driving device 302 jointly drive the liquid in the first passage to flow, so that the liquid flows through the first filter 303. After being filtered by the first filter 303, the liquid is finally discharged from the first passage. In this process, the first pressure sensing device 304 continuously senses the pressure of the liquid flow in the pipeline. If the sensed pressure is not within the pressure value range corresponding to the normal use of the filter, it indicates that the first filter 303 is blocked; if the pressure value is within the pressure value range, it indicates that the first filter 303 is not blocked and can be used normally. Among them, the pressure value range corresponding to the normal use of the filter can be obtained through experimental testing, that is, the pressure value range of the liquid flow corresponding to the filter in normal use state is experimentally tested.

[0065] In addition to detecting the state of the filter, the detection system of this embodiment can also be used to clean the sample needle after the sample is sucked, and can detect whether the filter is blocked while cleaning the sample needle. The specific implementation method is that a swab 306 is also installed on the pipeline between the second liquid driving device 302 and the first filter 303. The swab 306, the second liquid driving device 302, the first filter 303, the first pressure sensing device 304 and the first liquid driving device 301 together form the aforementioned first passage in this embodiment. At the same time, the swab 306 is wrapped around the outer wall of the sample needle 307. When the cleaning liquid is passed into the first passage, the swab 306 can clean the outer wall of the sample needle 307.

[0066] While the swab 306 cleans the outer wall of the sample needle 307, the first pressure sensing device 304 can continuously sense the pressure of the liquid flowing in the pipeline, so as to determine whether the filter is blocked while cleaning the sample needle.

[0067] In this embodiment, the pressure of the liquid flow sensed by the first pressure sensing device 304 may be an absolute pressure or a gauge pressure. In addition, the vacuum degree may also be used as an indicator to represent the pressure sensed by the first pressure sensing device 304. The specific form of the pressure sensed by the first pressure sensing device 304 is not limited.

[0068] In this embodiment, the first pressure sensing device 304 may be a pressure sensor, and the pressure sensor 304 may convert the pressure of the sensed liquid flow into a signal output, and the signal carries the value of the pressure. Then the detection system receives the signal output by the pressure sensor 304 through the control device, obtains the value of the pressure, and the control device processes the value of the pressure.

[0069] In this embodiment, the first pressure sensing device 304 may also be a pressure gauge. When sensing the pressure of the liquid flow, the pressure gauge transmits the pressure deformation to the pointer through the elastic deformation of the force-sensitive element in the gauge, and then the conversion mechanism of the movement in the gauge causes the pointer to rotate to display the value of the pressure of the liquid flow. The first pressure sensing device 304 may also be other devices with force-sensitive elements that can sense the pressure of the liquid flow in the pipeline, and the specific type is not limited.

[0070] exist Figure 3 In the structure of the detection system shown, the first pressure sensor 304 is installed on the liquid outlet side of the first filter 303, but the first pressure sensor 304 can also be installed on the liquid outlet side of the first filter 303, and the installation position of the first pressure sensor 304 relative to the first filter 303 is not limited.

[0071] In this embodiment, the detection system determines whether the filter is clogged while cleaning the outer wall of the sample needle, and can also determine whether the filter is clogged while cleaning the inner wall of the sample needle. Specifically, the detection system can also include: a second pressure sensor 308, a third liquid drive device 309, a line connection switch 310 and a syringe 311, wherein the syringe 311 is connected to the sample needle 307 through a pipeline, and the second pressure sensor 308 is installed on the pipeline between the syringe 311 and the sample needle 307.

[0072] The syringe 311 is connected to the liquid outlet of the line connection switch 310 through a pipeline, and the third liquid driving device 309 is connected to the liquid inlet of the line connection switch 310 and the liquid container through a pipeline.

[0073] The side wall of the sample needle 307 is provided with an opening, which is close to the needle tip of the sample needle 307 , and the sample needle 307 is connected with the swab 306 through the opening.

[0074] In this embodiment, the third liquid driving device 309 refers to a device that extracts liquid from a liquid container into a pipeline based on the principle of atmospheric pressure difference and can provide power for the flow of the liquid, and is used to drive the liquid to flow. The line connection switch 310 is used to control the connection state of the line in which it is located. When the line connection switch 310 is closed, the line in which the line connection switch 310 is located is in a connected state; when the line connection switch 310 is opened, the line in which the line connection switch 310 is located is in a disconnected state.

[0075] Therefore, in this embodiment, the third liquid driving device 309, the line connection switch 310, the syringe 311, the second pressure sensor 308, the sample needle 307, the swab 306, the first filter 303, the first pressure sensor 304 and the first liquid driving device 301 can form a second passage. When the line connection switch 310 is closed, and the third liquid driving device 309 is turned on and draws cleaning liquid from the liquid container through the pipeline 305 into the second passage, the first liquid driving device 301 and the third liquid driving device 309 jointly drive the cleaning liquid in the second passage to flow. The cleaning liquid flowing in the sample needle 307 can remove impurities and debris attached to the inner wall. At the same time, the first pressure sensor 304 can continuously sense the pressure of the liquid flow in the pipeline, so that it can determine whether the filter is blocked while cleaning the inner wall of the sample needle.

[0076] During the flow of the cleaning liquid in the second passage, the second pressure sensor 308 can also continuously sense the pressure of the liquid flowing in the pipeline. During this process, the pressure sensed by the second pressure sensor 308 is used to determine whether the sample needle 307 is blocked.

[0077] In actual application, if the first filter 303 is detected to be clogged, if the first filter 303 is continued to be used, the liquid will not be filtered smoothly, affecting the filtration efficiency of the liquid. The liquid may overflow due to excessive liquid pressure, thereby causing biological contamination or damage to the equipment. Therefore, when the first filter 303 is clogged, the detection system has to be discontinued. In order to avoid the above situation, this embodiment further improves the structure of the detection system. Figure 3 The detection system shown in FIG. 1 is based on the detection system shown in FIG. 1 and a filter switching switch 312 and a second filter 313 are added. For the specific structure, please refer to FIG. Figure 4 .

[0078] The liquid inlet end of the first filter 303 and the liquid inlet end of the second filter 313 are connected to the liquid outlet end of the filter switching switch 312 through pipelines, and the liquid inlet end of the filter switching switch 312 is connected to the swab 306 through a pipeline. The filter switching switch 312 can switch the liquid to flow to the first filter 303 or switch the liquid to flow to the second filter 313. The liquid outlet end of the first filter 303 and the liquid outlet end of the second filter 313 are connected to the first liquid driving device 301 respectively.

[0079] Therefore, when the first filter 303 is clogged, the filter switching switch 312 can be switched to disconnect the first filter 303 from the line, and the spare second filter 313 can be connected to the line, so that the detection system has an available filter and can resume normal use.

[0080] It is understandable that the number of the second filters 313 used for backup in this embodiment can be one or more. For example, when the number of the second filters 313 is two, after the first filter 303 is clogged, the filter switching switch 312 can be switched to disconnect the first filter 303 from the line, and any one of the two second filters 313 can be connected to the line. The number of the second filters 313 is not limited.

[0081] In this embodiment, the first liquid driving device 301, the second liquid driving device 302 and the third liquid driving device 309 can be any one of a diaphragm pump, a peristaltic pump, a plunger pump or a syringe, as long as it is a device that can provide power for the flow of liquid and drive the flow of liquid, and the specific type is not limited.

[0082] The line connection switch 310 and the filter switching switch 312 can be any one of a solenoid valve, a pressure-breaking valve, a threaded valve, and a diaphragm valve, as long as they are devices that can control the connection state of the line. For example, the line connection switch 310 can be a two-way solenoid valve, and the filter switching switch 312 can be a three-way solenoid valve. The specific types of the line connection switch 310 and the filter switching switch 312 are not limited.

[0083] The above describes the filter status detection system in the embodiment of the present application. Figures 1 to 4 The filter status detection system shown in the figure further describes in detail the filter status detection method implemented by using the aforementioned detection system in the embodiment of the present application.

[0084] 1. Based on the above Figure 1 to Figure 2 A method for detecting the filter status is implemented by the detection system shown.

[0085] See also Figure 5In one embodiment of the present application, a method for detecting the filter status includes:

[0086] 501, switch the line switch;

[0087] In the aforementioned Figure 1 to Figure 2 In the detection system shown, the circuit switching switch can switch the connection status of different circuits. When the detection system needs to detect the filter status before aspirating and discharging a sample, the sample needle and the pressure sensing device are connected to the detection system through a pipeline. At this time, the circuit switching switch can be switched to form a first path with the sample needle, the pressure sensing device, the circuit switching switch, the first filter and the first liquid driving device.

[0088] For example, if the line switching switch is a three-way solenoid valve, and the connection state between the three-way solenoid valve and other components is that when the three-way solenoid valve is opened, the first path is formed, then the detection system can open the three-way solenoid valve to form the first path. Conversely, if the connection state between the three-way solenoid valve and other components is that when the three-way solenoid valve is closed, the first path is formed, then the detection system can close the three-way solenoid valve to form the first path.

[0089] 502. Start the first liquid driving device to drive the liquid in the first passage to flow through the first filter;

[0090] In practical applications, the first passage of the detection system may store liquid. To detect whether the filter is clogged, the first liquid driving device may be turned on to drive the liquid in the first passage to flow through the first filter. The first filter may filter the liquid flowing through.

[0091] 503. Sensing a first pressure of the liquid flowing in the pipeline by a pressure sensing device;

[0092] When the liquid flows through the first filter, the pressure sensing device can sense the pressure of the liquid flowing in the pipeline in real time. For the sake of distinction, the pressure detected when the liquid flows in the first passage is referred to as the first pressure in this embodiment.

[0093] In this embodiment, the pressure of the liquid flow sensed by the pressure sensing device can be an absolute pressure or a gauge pressure. In addition, the vacuum degree can also be used as an indicator to represent the pressure sensed by the pressure sensing device. The specific form of the pressure sensed by the pressure sensing device is not limited.

[0094] In practical applications, the pressure value range corresponding to the normal use of the first filter can be obtained through experimental testing, that is, the value range of the first pressure corresponding to the normal use state of the first filter can be obtained through experimental testing. Therefore, under the premise that the power of the first liquid driving device is the same as the power of the first liquid driving device during the experimental test, when the pressure sensing device senses the first pressure, it can be determined whether the first pressure is within the above-mentioned value range. If not, it indicates that the state of the first filter is abnormal and the first filter is clogged. If the first pressure is within the above-mentioned value range, it indicates that the first filter is in normal use.

[0095] Therefore, judging whether the filter is clogged by the pressure change of the liquid flow can accurately and intuitively detect the filter clogged condition compared to observing the filter clogged condition with the naked eye.

[0096] In this embodiment, if the pressure sensing device is a pressure sensor, the pressure sensor can convert the sensed first pressure into a signal output, and the signal carries the numerical value of the first pressure. The detection system receives the signal output by the pressure sensor and obtains the numerical value of the first pressure. The numerical value of the first pressure can be a sudden value at a certain time point, or it can be the average value of several first pressure values ​​within a certain time period, that is, when several first pressure values ​​are received, the average value of the several first pressure values ​​can be taken, and it is determined whether the average value is greater than the filter failure threshold of the first filter. Among them, the filter failure threshold is similar to the aforementioned pressure value range, and both can be obtained through experimental testing. The filter failure threshold refers to the numerical value of the first pressure corresponding to the critical state of failure of the first filter. The critical state of failure corresponds to a blockage degree of the first filter. When the first filter exceeds the blockage degree, the filter fails.

[0097] Therefore, when the first pressure is greater than the filter failure threshold, the blockage degree of the first filter has exceeded the blockage degree in the critical failure state, and it can be determined that the first filter is blocked. If the first pressure is less than or equal to the filter failure threshold, it indicates that the blockage degree of the first filter has not exceeded the critical failure state, and the first filter is not blocked.

[0098] Since the pressure sensing device can also be a pressure gauge, the detection system can also directly observe the value of the first pressure displayed on the pressure gauge and manually determine whether the value is greater than the filter failure threshold without using a pressure sensor to determine whether the filter is clogged. In this embodiment, the method of using the pressure sensing device to determine whether the filter is clogged is not limited.

[0099] In this embodiment, if the first filter is detected to be clogged, the detection system may also send a prompt signal to the user, prompting the user that the first filter is clogged, and may prompt the user to replace the first filter or repair the first filter. The form of the prompt signal is not limited, and may be a voice prompt signal, or a prompt signal displayed in text through a user interface.

[0100] 504. Switch filter switch;

[0101] In this embodiment, the detection system further includes a second filter. When the first filter is clogged, the filter switching switch can be switched to disconnect the first filter from the first passage and connect the second filter to the first passage. In this way, even if the first filter is clogged, the detection system does not need to be stopped, and the detection system can be continued to be used by switching the filter switching switch.

[0102] For example, if the filter switching switch is a three-way solenoid valve, and the connection state between the three-way solenoid valve and the filter is that when the three-way solenoid valve is closed, the first filter is connected to the first passage and the second filter is disconnected from the first passage; when the three-way solenoid valve is opened, the second filter is connected to the first passage and the first filter is disconnected from the first passage, then when the first filter is blocked, the detection system can open the three-way solenoid valve to connect the second filter to the first passage and disconnect the first filter from the first passage, so that the detection system has a new filter to use.

[0103] The number of the second filters can be arbitrary. For example, when there are two second filters, after the first filter is clogged, the filter switch can be switched to disconnect the first filter from the line and connect any one of the two second filters to the line.

[0104] 505. Switch the line switch and close the line connection switch;

[0105] When it is determined that the first filter is not blocked, the detection system can be connected to the sample needle for sample aspiration and sample discharge. Because when the pipeline of the detection system is filled with gas, the driving force generated by the syringe when aspirating and discharging the sample will compress the air, causing the volume of the air to change, thereby resulting in inaccurate sample aspiration or sample discharge. Liquids are not easily compressed. Therefore, before aspirating and discharging the sample, the detection system can fill the pipeline with liquid to ensure the accuracy of sample aspiration. The specific process is that the detection system closes the line connection switch to connect the line, and switches the line switching switch, so that the second liquid driving device, the line connection switch, the syringe, the pressure sensor, the sample needle, the swab, the line switching switch, the first filter and the first liquid driving device form a second passage.

[0106] The detection system may first switch the line switch and then close the line connection switch, or first close the line connection switch and then switch the line switch. The execution order of switching the line switch and closing the line connection switch is not limited.

[0107] 506. Turn on the second liquid driving device for a preset time, extract liquid from the liquid container, and drive the liquid to flow in the second passage;

[0108] After the second passage is formed, the detection system can turn on the second liquid driving device for a preset period of time, use the second liquid driving device to draw up liquid in the liquid container, and drive the drawn liquid to flow in the second passage. The second liquid driving device and the first liquid driving device jointly drive the liquid flow in the second passage.

[0109] Therefore, after the liquid fills the tube between the sample needle and the syringe, the sample needle and the syringe can be used to aspirate and discharge samples. Since the liquid is difficult to compress, the aspirated and discharged sample volumes can be ensured to be more accurate than when the tube between the sample needle and the syringe is filled with air.

[0110] During the process of liquid flowing in the second passage, the pressure sensor on the second passage can simultaneously sense the pressure of the liquid flow. For the sake of distinction, the pressure detected when the liquid flows in the second passage is called the second pressure. The second pressure can be used to determine whether the sample needle is blocked. Therefore, the detection system can receive the value of the second pressure sensed by the pressure sensor, and determine whether the second pressure is within the first preset range based on the first preset range. Similarly, the first preset range can also be obtained through experimental testing, that is, through experimental testing of the second pressure corresponding to the sample needle when it is in normal use and the sample needle is not blocked. When the value of the second pressure is not within the first preset range, it can be determined that the sample needle is blocked.

[0111] 507. Disconnect the line connection switch and turn off the first liquid driving device;

[0112] After the second passage is filled with liquid, the line connection switch can be disconnected and the first liquid driving device can be turned off to stop the operation of driving the liquid flow. After that, the detection system can use the sample needle and syringe to suck and discharge samples.

[0113] In this embodiment, the first pressure of the liquid in the first passage is sensed by the pressure sensing device, and the blockage condition of the filter is determined according to the change of the first pressure. Compared with the method of observing the blockage condition of the filter with the naked eye, the blockage condition of the filter can be accurately and intuitively found.

[0114] In this embodiment, the detection system can perform the operations described in the above steps 501 to 507 through a control device, that is, a computer program is stored in the control device, and when the control device executes the computer program, it can complete the operations described in the above steps 501 to 507, thereby realizing automatic control of the detection system of this embodiment.

[0115] 1. Based on the above Figure 3 to Figure 4 A method for detecting the filter status is implemented by the detection system shown.

[0116] See also Figure 6 In one embodiment of the present application, a method for detecting the filter status includes:

[0117] 601. Start the first liquid driving device;

[0118] In this embodiment, the second liquid driving device, the first filter, the first pressure sensing device and the first liquid driving device can form a first passage. In order to detect whether the first filter is blocked, liquid can be introduced into the first passage to drive the liquid in the first passage to flow. Therefore, the first liquid driving device can be turned on to provide power for the flow of the liquid.

[0119] 602. Turn on the second liquid driving device for a preset time, extract liquid from the liquid container, and drive the liquid to flow in the first passage;

[0120] In order to allow liquid to enter the first passage, the second liquid driving device can be turned on for a preset time. The second liquid driving device can draw liquid from the liquid container into the first passage, and the second liquid driving device and the first liquid driving device can jointly drive the liquid in the first passage to flow.

[0121] 603. Sensing a first pressure of the liquid flowing in the pipeline by a first pressure sensing device;

[0122] During the process of liquid flowing in the first passage, the first pressure sensing device can sense the pressure of the liquid flowing in the pipeline in real time. For the sake of distinction, in this embodiment, the pressure detected by the first pressure sensing device when the liquid flows in the first passage is referred to as the first pressure.

[0123] In this embodiment, the pressure of the liquid flow sensed by the first pressure sensing device can be an absolute pressure or a gauge pressure. In addition, the vacuum degree can also be used as an indicator to represent the pressure sensed by the first pressure sensing device. The specific form of the pressure sensed by the first pressure sensing device is not limited.

[0124] In practical applications, the pressure value range corresponding to the normal use of the first filter can be obtained through experimental testing, that is, the value range of the first pressure corresponding to the normal use state of the first filter can be obtained through experimental testing. Therefore, under the premise that the power of the liquid driving device is the same as the power of the liquid driving device during the experimental test, when the first pressure sensing device senses the first pressure, it can be determined whether the first pressure is within the above-mentioned value range. If not, it indicates that the state of the first filter is abnormal and the first filter is clogged. If the first pressure is within the above-mentioned value range, it indicates that the first filter is in normal use.

[0125] In this embodiment, if the first pressure sensing device is a first pressure sensor, the first pressure sensor can convert the sensed first pressure into a signal output, and the signal carries the numerical value of the first pressure. The detection system receives the signal output by the first pressure sensor and obtains the numerical value of the first pressure. The numerical value of the first pressure can be a sudden value at a certain point in time, or it can be an average value of several first pressure values ​​within a certain time period, that is, when several first pressure values ​​are received, the average value of the several first pressure values ​​can be taken, and it can be determined whether the average value is within the first preset range. Among them, the first preset range can be obtained through experimental testing, that is, by experimentally testing the numerical value of the first pressure corresponding to the first filter in normal use, thereby establishing the pressure numerical range corresponding to the normal use of the first filter.

[0126] If the first pressure is not within the first preset range, it can be determined that the use state of the first filter is abnormal and the first filter is clogged. If the first pressure is within the first preset range, it can be determined that the first filter is in normal use and the first filter is not clogged.

[0127] In this embodiment, the first pressure sensor can be installed on the liquid outlet side of the first filter, or can be installed on the liquid inlet side of the first filter. If the first pressure sensor is installed on the liquid outlet side of the first filter, it can be determined whether the average value of the first pressure is less than the filter failure threshold of the first filter. The filter failure threshold is the same as the aforementioned Figure 5 The filter failure threshold in the illustrated embodiment is similar and will not be described in detail here.

[0128] When the first pressure is less than the filter failure threshold, the blockage degree of the first filter has exceeded the blockage degree in the critical failure state, and it can be determined that the first filter is blocked. If the first pressure is greater than or equal to the filter failure threshold, it indicates that the blockage degree of the first filter has not exceeded the critical failure state, and the first filter is not blocked.

[0129] Since the first pressure sensing device can also be a pressure gauge, the detection system can also directly observe the value of the first pressure displayed on the pressure gauge and manually determine whether the value is within the aforementioned first preset range without using the first pressure sensor to determine whether the filter is clogged. In this embodiment, the method of using the first pressure sensing device to determine whether the filter is clogged is not limited.

[0130] In this embodiment, if the first filter is detected to be clogged, the detection system may also send a prompt signal to the user, prompting the user that the first filter is clogged, and may prompt the user to replace the first filter or repair the first filter. The form of the prompt signal is not limited, and may be a voice prompt signal, or a prompt signal displayed in text through a user interface.

[0131] 604. Drive the sample needle and the swab to move relative to each other, so that the swab cleans the outer wall of the sample needle;

[0132] In this embodiment, the detection system can also be used to clean the outer wall of the sample needle after the sample is sucked. The specific process is that when the liquid flows in the first passage, since the swab is wrapped on the outer wall of the sample needle, the detection system can drive the sample needle and the swab to move relative to each other, that is, drive the swab to slide on the outer wall of the sample needle, or drive the sample needle to move relative to the swab, thereby causing the swab to rub against the outer wall of the sample needle, and the swab is used to wipe off the impurities or debris remaining on the outer wall. At the same time, driven by the water flow, the impurities or debris that fall off the outer wall flow away with the liquid, thereby completing the cleaning of the outer wall of the sample needle.

[0133] 605. Close the line connection switch;

[0134] In addition to cleaning the outer wall of the sample needle, the detection system can also clean the inner wall of the sample needle after the sample is sucked. The specific process is that the detection system closes the line connection switch to form a second passage with the third liquid driving device, the line connection switch, the syringe, the second pressure sensor, the sample needle, the swab, the first filter, the first pressure sensor and the first liquid driving device, so as to provide a connected line for the flow of the liquid.

[0135] 606. Turn on the third liquid driving device for a preset time, extract liquid from the liquid container, and drive the liquid to flow in the second passage;

[0136] The detection system turns on the third liquid driving device for a preset period of time. The third liquid driving device can draw liquid from the liquid container into the second passage. The third liquid driving device and the first liquid driving device jointly drive the liquid to flow in the second passage. When the liquid flows through the sample needle, it can flush away impurities and debris remaining on the inner wall of the sample needle, thereby cleaning the inner wall of the sample needle.

[0137] It is understandable that, when the inner wall and outer wall of the sample needle are cleaned, since both the first passage and the second passage have the first pressure sensor, the pressure of the liquid flow can be detected by the first pressure sensor during the inner wall cleaning or the outer wall cleaning process, and the filter can be judged whether it is blocked according to the pressure. The process of judging whether the filter is blocked according to the pressure sensed by the first pressure sensor while the inner wall cleaning or the outer wall cleaning is similar to the aforementioned process of judging whether the filter is blocked according to the first pressure, and will not be repeated here.

[0138] During the process of liquid flowing in the second passage, the second pressure sensor on the second passage can simultaneously sense the pressure of the liquid flow. For the sake of distinction, the pressure detected by the second pressure sensor when the liquid flows in the second passage is referred to as the second pressure. The second pressure can be used to determine whether the sample needle is blocked. Therefore, the detection system can receive the value of the second pressure sensed by the second pressure sensor, and determine whether the second pressure is within the second preset range based on the second preset range. Similarly, the second preset range can also be obtained through experimental testing, that is, through experimental testing of the second pressure corresponding to the sample needle when it is in normal use and the sample needle is not blocked. When the value of the second pressure is not within the second preset range, it can be determined that the sample needle is blocked.

[0139] 607. Disconnect the line connection switch and turn off the first liquid driving device;

[0140] After the inner wall of the sample needle is cleaned, the line connection switch can be disconnected and the first liquid driving device can be turned off to stop the operation of driving the liquid flow. After that, the detection system can use the sample needle and the syringe to sample the next sample to be detected.

[0141] 608. Toggle filter switch;

[0142] In this embodiment, if the first filter is detected to be clogged, the filter switch can be switched to disconnect the first filter from the first passage and the second passage, and connect the second filter to the first passage and the second passage. The process of switching the filter switch in this step is the same as the above Figure 5 The process of switching the filter switch in step 504 in the illustrated embodiment is similar and will not be described in detail here.

[0143] In this embodiment, the sample needle can perform a filter status detection operation while performing inner wall cleaning and outer wall cleaning. Compared with the method of performing the filter status detection operation alone, the use efficiency of the detection system is improved and the user's operation time is saved.

[0144] In this embodiment, the detection system can perform the operations described in the above steps 601 to 608 through a control device, that is, a computer program is stored in the control device, and when the control device executes the computer program, it can complete the operations described in the above steps 601 to 608, thereby realizing automatic control of the detection system of this embodiment.

[0145] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0146] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0147] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0148] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0149] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program code.

Claims

1. A filter status detection system, characterized in that: The detection system comprises a first filter, a pressure sensing device, a first liquid driving device and a control device, wherein the first liquid driving device is connected to the first filter through a pipeline; The detection system also includes a line switch and a syringe, the syringe is connected to the sample needle through a pipeline, the pressure sensing device is installed on the pipeline between the syringe and the sample needle, the sample needle is used to puncture the test tube cap of the sample tube, the needle tip of the sample needle passes through the test tube cap of the sample tube and immerses into the sample, and the syringe controls the sample needle to aspirate the sample; The detection system is also provided with a branch, one end of which is connected to the pipeline between the syringe and the pressure sensing device, and the other end is connected to the liquid inlet end of the line switching switch, and the liquid outlet end of the line switching switch is connected to the liquid inlet end of the first filter; The first liquid driving device is installed on the liquid outlet side of the first filter. The sample needle, the pressure sensing device, the branch, the line switching switch, the first filter and the first liquid driving device form a first passage. The first liquid driving device is used to drive the liquid flow in the first passage. The pressure sensing device is used to detect the pressure of the liquid flow in the first passage, so as to determine whether the first filter is blocked according to the detected pressure. If the first filter is detected to be blocked, the control device sends a prompt signal to the user, and the prompt signal is to prompt that the first filter is blocked and needs to be replaced or repaired to solve the blockage problem of the first filter.

2. The filter status detection system according to claim 1, characterized in that: The detection system further includes a second filter and a filter switch, wherein the liquid inlet end of the first filter and the liquid inlet end of the second filter are respectively connected to the liquid outlet end of the filter switch through pipelines; The liquid inlet end of the filter switching switch is connected to the liquid outlet end of the line switching switch, and the filter switching switch can switch the liquid to flow to the first filter or switch the liquid to flow to the second filter; The liquid outlet end of the first filter and the liquid outlet end of the second filter are respectively connected to the first liquid driving device.

3. The filter status detection system according to claim 2, characterized in that: The pressure sensing device is a pressure sensor, the control device is in communication connection with the pressure sensor, and the control device is used to process data sent by the pressure sensor.

4. The filter status detection system according to claim 3, characterized in that: The detection system further comprises: a line connection switch and a swab, wherein the liquid outlet end of the line connection switch is connected to the syringe through a pipeline; The swab is connected to the liquid inlet end of the circuit switch through a pipeline, the swab wraps the outer wall of the sample needle, the side wall of the sample needle is provided with an opening, the opening is close to the needle tip of the sample needle, and the sample needle is connected to the swab through the opening; The detection system also includes a second liquid driving device, which is connected to the liquid inlet end of the line connection switch and the liquid container through a pipeline. The second liquid driving device, the line connection switch, the syringe, the pressure sensor, the sample needle, the swab, the line switching switch, the first filter and the first liquid driving device form a second passage. The second liquid driving device is used to draw liquid from the liquid container into the second passage. The first liquid driving device and the second liquid driving device are used to drive the flow of liquid in the second passage.

5. The filter status detection system according to claim 4, characterized in that: The detection system also includes a third liquid driving device, which is connected to the swab and the liquid container through a pipeline. The third liquid driving device, the swab, the line switching switch, the first filter and the first liquid driving device form a third passage. The third liquid driving device is used to extract liquid from the liquid container into the third passage. The first liquid driving device and the third liquid driving device are used to drive the flow of liquid in the third passage.

6. The filter status detection system according to claim 5, characterized in that: The first liquid driving device, the second liquid driving device or the third liquid driving device is any one of a diaphragm pump, a peristaltic pump, a plunger pump or a syringe; the line switching switch, the line connection switch and the filter switching switch are any one of a solenoid valve, a pressure-breaking valve, a threaded valve, and a diaphragm valve.

7. A filter status detection system, characterized in that: The detection system includes a first liquid driving device and a second liquid driving device, a first filter, a first pressure sensing device and a control device; The first pressure sensing device is connected to the first filter through a pipeline, the first liquid driving device is connected to the liquid outlet end of the first filter through a pipeline, the liquid inlet end of the second liquid driving device is connected to the liquid container through a pipeline, and the liquid outlet end of the second liquid driving device is connected to the liquid inlet end of the first filter; The detection system also includes a sample needle and a syringe, wherein the sample needle is used to puncture the test tube cap of the sample tube, the needle tip of the sample needle passes through the test tube cap of the sample tube and immerses into the sample, and the syringe controls the sample needle to aspirate the sample; The detection system also includes a swab, which wraps the outer wall of the sample needle and is used to clean the sample needle. The swab is installed on the pipeline between the second liquid driving device and the first filter. The swab and the second liquid driving device, the first filter, the first pressure sensing device and the first liquid driving device form a first passage. The second liquid driving device is used to draw liquid from the liquid container into the first passage. The first liquid driving device and the second liquid driving device are used to drive the liquid flow in the first passage. The first pressure sensing device is used to detect the pressure of the liquid flow in the first passage to determine whether the first filter is blocked according to the detected pressure. If it is detected that the first filter is blocked, the control device sends a prompt signal to the user, and the prompt signal is to prompt that the first filter is blocked and the first filter needs to be replaced or the first filter needs to be repaired to solve the blockage problem of the first filter.

8. The filter status detection system according to claim 7, characterized in that: The first pressure sensing device is a first pressure sensor, the control device is in communication connection with the first pressure sensor, and the control device is used to process data sent by the first pressure sensor.

9. The filter status detection system according to claim 8, characterized in that: The first pressure sensor is installed on the liquid outlet side of the first filter.

10. The filter status detection system according to any one of claims 8 to 9, characterized in that: The detection system further comprises: a second pressure sensor, a third liquid driving device and a line connection switch, the syringe and the sample needle are connected through a pipeline, and the second pressure sensor is installed on the pipeline between the syringe and the sample needle; The syringe is connected to the liquid outlet of the line connection switch through a pipeline, and the third liquid driving device is connected to the liquid inlet of the line connection switch and the liquid container through a pipeline; The side wall of the sample needle is provided with an opening, the opening is close to the needle tip of the sample needle, and the sample needle is connected with the swab through the opening; The third liquid driving device, the line connection switch, the syringe, the second pressure sensor, the sample needle, the swab, the first filter, the first pressure sensor and the first liquid driving device form a second passage, the third liquid driving device is used to draw liquid from the liquid container into the second passage, and the first liquid driving device and the third liquid driving device are used to drive the flow of liquid in the second passage.

11. The filter status detection system according to claim 10, characterized in that: The detection system further includes a second filter, and the detection system further includes a filter switching switch, wherein the liquid inlet end of the first filter and the liquid inlet end of the second filter are respectively connected to the liquid outlet end of the filter switching switch through pipelines; The liquid inlet end of the filter switching switch is connected to the swab through a pipeline, and the filter switching switch can switch the liquid to flow to the first filter or switch the liquid to flow to the second filter; The liquid outlet end of the first filter and the liquid outlet end of the second filter are respectively connected to the first liquid driving device.

12. The filter status detection system according to claim 11, characterized in that: The first liquid driving device, the second liquid driving device or the third liquid driving device is any one of a diaphragm pump, a peristaltic pump, a plunger pump or a syringe; the line connection switch and the filter switching switch are any one of a solenoid valve, a pressure-breaking valve, a threaded valve, and a diaphragm valve.

13. A method for detecting a filter status, characterized in that: The method is applied to the filter status detection system according to any one of claims 1 to 6, and the method comprises: Switching the circuit switch so that the sample needle, the pressure sensing device, the circuit switch, the first filter and the first liquid driving device form a first passage; Turning on the first liquid driving device to drive the liquid in the first passage to flow through the first filter; The pressure sensing device senses a first pressure of the liquid flowing in the pipeline.

14. The method for detecting the filter status according to claim 13, characterized in that: The pressure sensing device is a pressure sensor; After the pressure sensing device senses the first pressure of the liquid flowing in the pipeline, the method further comprises: determining whether the first pressure is greater than a filter failure threshold, the first pressure being an average value of a plurality of first pressures sensed by the pressure sensor; If it is greater than, it is determined that the first filter is clogged; If it is not greater than, it is determined that the first filter is not blocked.

15. The method for detecting the filter status according to claim 14, characterized in that: If the first filter is clogged, the method further comprises: The user is prompted that the first filter is clogged and the first filter should be replaced.

16. The method for detecting the filter status according to claim 14, characterized in that: If the first filter is clogged, the method further comprises: The filter switching switch is switched to disconnect the first filter from the first passage and connect the second filter to the first passage.

17. The method for detecting the filter status according to claim 14, characterized in that: If the first filter is not clogged, the method further comprises: Switching the line switching switch and closing the line connection switch so that the second liquid driving device, the line connection switch, the syringe, the pressure sensor, the sample needle, the swab, the line switching switch, the first filter and the first liquid driving device form a second passage; Turning on the second liquid driving device for a preset time, extracting liquid from the liquid container, and driving the liquid to flow in the second passage, so that the liquid fills the second passage; The line connection switch is opened, and the first liquid driving device is turned off.

18. The method for detecting the filter status according to claim 17, characterized in that: After the driving liquid flows in the second passage, the method further includes: receiving a second pressure of the liquid flow sensed by the pressure sensor; Determining whether the value of the second pressure is within a first preset range; If not, it is determined that the sample needle is clogged.

19. The method for detecting the filter status according to claim 17, characterized in that: The first liquid driving device or the second liquid driving device is any one of a diaphragm pump, a peristaltic pump, a plunger pump or a syringe; the line switching switch, the line connection switch and the filter switching switch are any one of a solenoid valve, a pressure-breaking valve, a threaded valve, and a diaphragm valve.

20. A method for detecting a filter status, characterized in that: The method is applied to the filter status detection system according to any one of claims 7 to 12, and the method comprises: Turning on the first liquid driving device; Turning on the second liquid driving device for a preset time to extract liquid from the liquid container and drive the liquid to flow in the first passage; A first pressure sensing device senses a first pressure of the liquid flowing in the pipeline.

21. The method for detecting the filter status according to claim 20, characterized in that: The first pressure sensing device is a first pressure sensor; After sensing the first pressure of the liquid flowing in the pipeline by the first pressure sensing device, the method further includes: determining whether the first pressure is within a first preset range, the first pressure being an average value of a plurality of first pressures sensed by the first pressure sensor; If the first pressure is not within the first preset range, it is determined that the first filter is clogged; If the first pressure is within the first preset range, it is determined that the first filter is not clogged.

22. The method for detecting the filter status according to claim 21, characterized in that: The first pressure sensor is installed on the liquid outlet side of the first filter; The determining whether the first pressure is within a first preset range includes: determining whether the first pressure is less than a filter failure threshold; If it is less than, it is determined that the first filter is clogged; If it is not less than, it is determined that the first filter is not blocked.

23. The method for detecting the filter status according to claim 21, characterized in that: If the first filter is clogged, the method further comprises: The user is prompted that the first filter is clogged and the first filter should be replaced.

24. The method for detecting the filter status according to claim 20, characterized in that: After the driving liquid flows in the first passage, the method further comprises: The sample needle and the swab are driven to move relative to each other, so that the swab cleans the outer wall of the sample needle.

25. The method for detecting the filter status according to any one of claims 21 to 24, characterized in that: After the second liquid driving device is turned on for a preset time, the method further includes: Closing the line connection switch so that the third liquid driving device, the line connection switch, the syringe, the second pressure sensor, the sample needle, the swab, the first filter, the first pressure sensor and the first liquid driving device form a second passage; Turning on the third liquid driving device for a preset time, extracting liquid from the liquid container, and driving the liquid to flow in the second passage to clean the inner wall of the sample needle; The line connection switch is opened, and the first liquid driving device is turned off.

26. The method for detecting the filter status according to claim 25, characterized in that: After the driving liquid flows in the second passage, the method further includes: receiving a second pressure of the liquid flow sensed by the second pressure sensor; Determining whether the value of the second pressure is within a second preset range; If not, it is determined that the sample needle is clogged.

27. The method for detecting the filter status according to claim 25, characterized in that: If the first filter is clogged, the method further comprises: The filter switching switch is switched to disconnect the first filter from the first passage and the second passage, and connect the second filter to the first passage and the second passage.

28. The method for detecting the filter status according to claim 27, characterized in that: The first liquid driving device, the second liquid driving device or the third liquid driving device is any one of a diaphragm pump, a peristaltic pump, a plunger pump or a syringe; the line connection switch and the filter switching switch are any one of a solenoid valve, a pressure-breaking valve, a threaded valve, and a diaphragm valve.

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