Sampling device and control method thereof

Abstract

The invention discloses a sampling device and a control method thereof. The sampling device comprises a sampling needle, a first two-way valve, a first suction and spitting module, a second two-way valve, a storage module, a first three-way valve and a second suction and spitting module, one end of the sampling needle is connected with one end of the first two-way valve, the other end of the first two-way valve is connected with the first suction and spitting module, the first suction and spitting module is connected with one end of the second two-way valve, the other end of the second two-way valve is connected with the storage module, and the storage module is connected with the common end of the first three-way valve; the second end of the first three-way valve is connected with outside air; the control method comprises the steps that positive pressure is provided in response to the second suction and spitting module, liquid in the storage module is pushed, cleaning of the sampling device is completed, and then the first two-way valve is closed; the second two-way valve is kept open, connection between the common end and the second end of the first three-way valve is conducted, and pressure relief is completed; and the second two-way valve is closed for sampling operation, so that the accuracy of sample detection can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of sample detection, and in particular to a sampling device and a control method thereof. Background Art

[0002] In the prior art, the sampling device usually includes a syringe and a sampling needle connected to each other. The syringe can also be connected to a corresponding cleaning device. Corresponding two-way valves can be provided between the syringe and the sampling needle, and between the syringe and the cleaning device. By controlling the switches of these two-way valves, sampling operations based on the syringe and the sampling needle can be realized, or cleaning operations on the syringe and the sampling needle can be realized.

[0003] The defect of the existing technology is that after the cleaning operation is completed, a certain positive pressure usually remains in the pipeline between the sampling needle and the cleaning device. After cleaning, it is usually necessary to close the two-way valve between the syringe and the sampling needle, and the two-way valve between the syringe and the cleaning device, in preparation for the subsequent corresponding sampling operation. However, under the control of the existing sampling device and the control method of the sampling device, it is easy for the two-way valve between the syringe and the sampling needle, and the two-way valve between the syringe and the cleaning device to be closed, so that the positive pressure remaining in the pipeline from the sampling needle to the cleaning device is locked between the two two-way valves, which can easily cause the positive pressure to cause the pipeline to deform to varying degrees. This deformation can easily cause part of the collected sample to be spit out due to the recovery of the deformation during the subsequent sampling operation, so that the amount of the sample actually collected is inconsistent with the expectation, thereby resulting in low accuracy of subsequent sample detection based on the collected sample. Summary of the Invention

[0004] The main technical problem solved by this application is how to improve the accuracy of sample detection.

[0005] In order to solve the above technical problems, the first technical solution adopted in this application is: a control method for a sampling device, the sampling device includes a sampling needle, a first two-way valve, a first suction and exhalation module, a second two-way valve, a storage module, a first three-way valve and a second suction and exhalation module; one end of the sampling needle is connected to one end of the first two-way valve, the other end of the first two-way valve is connected to the first suction and exhalation module, the first suction and exhalation module is connected to one end of the second two-way valve, the other end of the second two-way valve is connected to the storage module, the storage module is connected to the common end of the first three-way valve, the first end of the first three-way valve is connected to the second suction and exhalation module, and the second end of the first three-way valve is connected to the outside air; the control method includes: in response to the second suction and exhalation module providing positive pressure, pushing the liquid in the storage module to complete the cleaning of the sampling device, and then closing the first two-way valve; keeping the second two-way valve open and connecting the common end and the second end of the first three-way valve to complete the pressure relief; closing the second two-way valve to wait for the sampling operation.

[0006] Wherein, after closing the second two-way valve, the control method further includes: connecting the common end and the first end of the first three-way valve.

[0007] Among them, when the first two-way valve and the second two-way valve are both closed, the control method also includes: in response to the sampling device to perform continuous sampling operation, opening the second two-way valve and connecting the common end and the first end of the first three-way valve; controlling the second suction and discharge module to provide positive pressure; in response to the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve reaching the target hydraulic pressure, connecting the common end and the second end of the first three-way valve; closing the second two-way valve to wait for the continuous sampling operation.

[0008] After closing the second two-way valve to prepare for continuous sampling, the control method further includes: opening the first two-way valve and controlling the first suction and discharge module to perform continuous sampling.

[0009] The closing of the second two-way valve to prepare for continuous sampling includes: in response to the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve reaching the normal pressure of the external air, closing the second two-way valve to prepare for continuous sampling.

[0010] The closing of the second two-way valve to prepare for continuous sampling includes: in response to the second two-way valve being opened for a time period greater than a second preset time threshold, closing the second two-way valve to prepare for continuous sampling.

[0011] The target hydraulic pressure is the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve when the sampling device performs continuous sampling operation.

[0012] The closing of the second two-way valve to prepare for sampling includes: in response to the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve reaching the normal pressure of the external air, closing the second two-way valve to prepare for sampling.

[0013] The closing of the second two-way valve to prepare for the sampling operation includes: in response to the second two-way valve being opened for a time period greater than a first preset time period threshold, closing the second two-way valve to prepare for the sampling operation.

[0014] In order to solve the above technical problems, the second technical solution adopted in this application is: a sampling device, including a sampling needle, a first two-way valve, a first suction and exhalation module, a second two-way valve, a storage module, a first three-way valve, a second suction and exhalation module and a control module; one end of the sampling needle is connected to one end of the first two-way valve, the other end of the first two-way valve is connected to the first suction and exhalation module, the first suction and exhalation module is connected to one end of the second two-way valve, the other end of the second two-way valve is connected to the storage module, the storage module is connected to the common end of the first three-way valve, the first end of the first three-way valve is connected to the second suction and exhalation module, and the second end of the first three-way valve is connected to the outside air; the control module is used to: respond to the positive pressure provided by the second suction and exhalation module, push the cleaning liquid in the storage module, complete the cleaning of the sampling device, and then close the first two-way valve; keep the second two-way valve open and connect the common end and the second end of the first three-way valve to complete the pressure relief; close the second two-way valve.

[0015] The beneficial effect of the present application is that, different from the prior art, in the technical solution of the present application, the sampling device includes a sampling needle, a first two-way valve, a first suction and exhalation module, a second two-way valve, a storage module, a first three-way valve, a second suction and exhalation module and a control module, one end of the sampling needle is connected to one end of the first two-way valve, the other end of the first two-way valve is connected to the first suction and exhalation module, the first suction and exhalation module is connected to one end of the second two-way valve, the other end of the second two-way valve is connected to the storage module, the storage module is connected to the common end of the first three-way valve, the first end of the first three-way valve is connected to the second suction and exhalation module, and the second end of the first three-way valve is connected to the outside air. In response to the positive pressure provided by the second suction and exhalation module, the cleaning liquid in the storage module is pushed to complete the cleaning of the sampling device, then: the first two-way valve is closed; the second two-way valve is kept open and the connection between the common end and the second end of the first three-way valve is connected; the second two-way valve is closed. Based on the above method, after the sampling device is cleaned, first, the first two-way valve located between the sampling needle and the syringe is closed, and the second two-way valve is kept open. Then, the common end and the second end of the first three-way valve are connected to allow the positive pressure in the pipeline between the first two-way valve and the second two-way valve to escape to the outside air. Finally, the second two-way valve is closed to prepare for the sampling operation, thereby minimizing the possibility of deformation of the pipeline between the first two-way valve and the second two-way valve, or minimizing the degree of deformation of the pipeline between the first two-way valve and the second two-way valve, thereby improving the accuracy of subsequent sampling operations based on the sampling device and improving the accuracy of sample detection based on samples collected by the sampling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a flow chart of an embodiment of a control method for a sampling device of the present application;

[0018] Figure 2 It is a structural schematic diagram of an embodiment of the sampling device of the present application.

[0019] Reference numerals: sampling needle 11 , first two-way valve 12 , first suction and exhalation module 13 , second two-way valve 14 , storage module 15 , first three-way valve 16 , second suction and exhalation module 17 , second three-way valve 171 . DETAILED DESCRIPTION

[0020] The present application will be further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only intended to illustrate the present application and are not intended to limit the scope of the present application. Similarly, the following examples are only some examples of the present application and not all examples. All other examples obtained by those of ordinary skill in the art without creative work are intended to fall within the scope of protection of this application.

[0021] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "installed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can mean fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or connection through an intermediate medium. Those skilled in the art will be able to understand the specific meanings of the above terms in this application in specific circumstances.

[0023] This application proposes a control method for a sampling device, see Figure 1 and Figure 2 , Figure 1 This is a flow chart of an embodiment of the control method of the sampling device of the present application. Figure 2It is a structural schematic diagram of an embodiment of the sampling device of the present application.

[0024] The control method is applied to sampling devices, such as Figure 2 As shown, the sampling device includes a sampling needle 11, a first two-way valve 12, a first suction and exhalation module 13, a second two-way valve 14, a storage module 15, a first three-way valve 16, and a second suction and exhalation module 17. The storage module 15 can store liquid for cleaning, such as a diluent or a cleaning liquid.

[0025] One end of the sampling needle 11 is connected to one end of the first two-way valve 12, the other end of the first two-way valve 12 is connected to the first suction and exhalation module 13, the first suction and exhalation module 13 is connected to one end of the second two-way valve 14, the other end of the second two-way valve 14 is connected to the storage module 15, the storage module 15 is connected to the common end of the first three-way valve 16, the first end of the first three-way valve 16 is connected to the second suction and exhalation module 17, and the second end of the first three-way valve 16 is connected to the outside air.

[0026] Based on the above structure, when sampling operation is required, the first two-way valve 12 can be opened and the second two-way valve 14 can be closed. At this time, the other end of the sampling needle 11 can be inserted into the corresponding sample tube, and the first suction and exhalation module 13 can be controlled to provide negative pressure to suck the sample in the sample tube into the first suction and exhalation module 13. Then, the other end of the sampling needle 11 can be extended into the corresponding reaction pool or the reaction pool, and the first suction and exhalation module 13 can be controlled to provide positive pressure to exhale the sample in the sample tube into the reaction pool, completing a sample sampling operation.

[0027] In one example, the first suction and exhalation module 13 may specifically be a syringe.

[0028] Generally speaking, after completing all sampling operations corresponding to a sample, in order to avoid cross-contamination between different samples, it is usually necessary to control the second suction and exhalation module 17 to provide positive pressure to push the liquid in the storage module 15, so that the liquid passes through the second two-way valve 14, the first suction and exhalation module 13, the first two-way valve 12 and the sampling needle 11 in sequence from the storage module 15, and is discharged from the other end of the sampling needle 11, thereby cleaning the first suction and exhalation module 13 and the sampling needle 11.

[0029] like Figure 2 As shown, the control method includes:

[0030] Step S11 : in response to the positive pressure provided by the second suction and discharge module 17 , the liquid in the storage module 15 is pushed to complete the cleaning of the sampling device, and then the first two-way valve 12 is closed.

[0031] Among them, after the above-mentioned control of the second suction and exhalation module 17 to provide positive pressure pushes the liquid in the storage module 15, so that the liquid passes through the second two-way valve 14, the first suction and exhalation module 13, the first two-way valve 12 and the sampling needle 11 in sequence from the storage module 15, and is discharged from the other end of the sampling needle 11, completing the step of cleaning the first suction and exhalation module 13 and the sampling needle 11, since the positive pressure is always maintained in the pipeline between the first two-way valve 12 and the second two-way valve 14 during cleaning, it is easy for the pipeline between the first two-way valve 12 and the second two-way valve 14 to be deformed due to the positive pressure. Therefore, it is necessary to release the positive pressure in this part of the pipeline and restore normal pressure to reduce the possibility of deformation or avoid deformation.

[0032] After controlling the second suction and exhalation module 17 to complete the cleaning of the first suction and exhalation module 13 and the sampling needle 11, the first two-way valve 12 can be closed first, but the second two-way valve 14 is not closed in this step, so as to facilitate the related processing of pressure relief of the pipeline between the first two-way valve 12 and the second two-way valve 14 in the subsequent steps.

[0033] Step S12: Keep the second two-way valve 14 open and connect the common end and the second end of the first three-way valve 16 to complete the pressure relief.

[0034] Among them, after closing the first two-way valve 12, the second two-way valve 14 remains in an open state. At this time, the connection between the common end and the second end of the first three-way valve 16 is connected, so that the pipeline between the first two-way valve 12 and the second two-way valve 14 is connected to the outside air through the storage module 15. Since the outside air is at normal pressure, after a certain period of time of the above-mentioned connection treatment, the positive pressure of the pipeline between the first two-way valve 12 and the second two-way valve 14 can be restored to the normal pressure through pressure relief, thereby reducing the possibility of deformation or avoiding deformation.

[0035] Step S13: close the second two-way valve 14 to prepare for sampling.

[0036] Among them, after completing the above-mentioned connection processing and realizing the pressure relief of the positive pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14, the second two-way valve 14 can be closed. At this time, the conditions in the sampling device are summarized as follows: the positive pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 is restored to normal pressure or a level close to normal pressure after the pressure relief, and the first two-way valve 12 and the second two-way valve 14 are both closed. The sampling device now enters a standby state and is ready for sampling operation. In addition, the possibility of inaccurate sampling volume due to deformation and / or positive pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 during the sampling operation is reduced as much as possible, thereby improving the accuracy of subsequent sample detection based on the samples collected by the sampling device.

[0037] In summary, in the prior art, the first two-way valve 12 and the second two-way valve 14 are usually closed at the same time after cleaning is completed, which can easily cause deformation and / or positive pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14, and thus easily lead to inaccurate sampling volume during subsequent sampling based on the sampling device.

[0038] Different from the prior art, in the technical solution of the present application, the sampling device includes a sampling needle 11, a first two-way valve 12, a first suction and exhalation module 13, a second two-way valve 14, a storage module 15, a first three-way valve 16, a second suction and exhalation module 17 and a control module. One end of the sampling needle 11 is connected to one end of the first two-way valve 12, the other end of the first two-way valve 12 is connected to the first suction and exhalation module 13, the first suction and exhalation module 13 is connected to one end of the second two-way valve 14, the other end of the second two-way valve 14 is connected to the storage module 15, the storage module 15 is connected to the common end of the first three-way valve 16, the first end of the first three-way valve 16 is connected to the second suction and exhalation module 17, and the second end of the first three-way valve 16 is connected to the outside air. In response to the positive pressure provided by the second suction and exhalation module 17, the cleaning liquid in the storage module 15 is pushed to complete the cleaning of the sampling device. Then: the first two-way valve 12 is closed; the second two-way valve 14 is kept open and the connection between the common end and the second end of the first three-way valve 16 is connected; and the second two-way valve 14 is closed. Based on the above method, after the sampling device is cleaned, first, the first two-way valve 12 located between the sampling needle 11 and the syringe is closed, and the second two-way valve 14 is kept open. Then, the common end and the second end of the first three-way valve 16 are connected, so that the positive pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 is released to the outside air. Finally, the second two-way valve 14 is closed to prepare for the sampling operation, thereby minimizing the possibility of deformation of the pipeline between the first two-way valve 12 and the second two-way valve 14, or minimizing the degree of deformation of the pipeline between the first two-way valve 12 and the second two-way valve 14, thereby improving the accuracy of subsequent sampling operations based on the sampling device and improving the accuracy of sample detection based on samples collected by the sampling device.

[0039] In addition, based on the above method, compared with the traditional normal pressure relief method over time, the positive pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 is released to the outside air through the first three-way valve 16, which can also improve the efficiency of pressure relief.

[0040] In one embodiment, after step S13, the control method may further include:

[0041] The common end and the first end of the first three-way valve 16 are connected.

[0042] Specifically, after the second two-way valve 14 is closed, the hydraulic pressure or air pressure in the pipeline from the second two-way valve 14 to the storage module 15, then to the first three-way valve 16, and then to the second suction and exhalation module 17 can no longer have any influence on the pipeline between the first two-way valve 12 and the second two-way valve 14. Therefore, at this time, the connection between the common end and the first end of the first three-way valve 16 can be opened to connect the pipeline between the second two-way valve 14 and the second suction and exhalation module 17 to the second suction and exhalation module 17, so that the air pressure in the pipeline between the second two-way valve 14 and the second suction and exhalation module 17 is equal to the pressure provided by the second suction and exhalation module 17 and is maintained at a stable value.

[0043] For example, a positive pressure can be maintained in the pipeline between the second two-way valve 14 and the second suction and exhalation module 17 at all times, and the positive pressure is greater than the normal pressure. When it is necessary to clean the pipeline between the first two-way valve 12 and the second two-way valve 14, after opening the first two-way valve 12 and the second two-way valve 14, the liquid used for cleaning in the storage module 15 can be affected by the positive pressure in the pipeline between the second two-way valve 14 and the second suction and exhalation module 17, and quickly flow to the pipeline between the first two-way valve 12 and the second two-way valve 14 at normal pressure, thereby improving the cleaning efficiency.

[0044] In one embodiment, when the first two-way valve 12 and the second two-way valve 14 are both closed, the control method further includes:

[0045] In response to the sampling device being ready to perform a continuous sampling operation, the second two-way valve 14 is opened, and the common end and the first end of the first three-way valve 16 are connected.

[0046] The second suction and discharge module 17 is controlled to provide positive pressure.

[0047] In response to the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaching the target hydraulic pressure, the common end and the second end of the first three-way valve 16 are connected.

[0048] The second two-way valve 14 is closed to prepare for continuous sampling operation.

[0049] Specifically, a pressure sensor may be provided on the pipeline between the first two-way valve 12 and the second two-way valve 14. The pressure sensor may be used to detect the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14. For example, the pressure sensor may be used to detect whether the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 has reached a target hydraulic pressure.

[0050] When the first two-way valve 12 and the second two-way valve 14 are both closed, the sampling device is usually in a state ready for sampling, for example, the sampling device is in a state of having just been cleaned.

[0051] It should be noted that when the sampling device performs multiple consecutive samplings to perform multiple consecutive sample tests, generally speaking, after a certain number of samplings, the pipeline between the first two-way valve 12 and the second two-way valve 14 will expand and deform due to the large number of samplings in a short period of time, which is similar to the deformation that occurs when there is positive pressure in the pipeline.

[0052] Therefore, after detecting that the sampling device needs to perform multiple consecutive samplings, it can ensure that the first two-way valve 12 is closed, the second two-way valve 14 is opened, the common end and the first end of the first three-way valve 16 are connected, and the second suction and discharge module 17 is controlled to provide positive pressure, so that the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaches the target hydraulic pressure.

[0053] The target hydraulic pressure may be the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 when the sampling device performs continuous sampling operations. That is, the target hydraulic pressure may be the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 when the pipeline between the first two-way valve 12 and the second two-way valve 14 expands and deforms due to a large number of sampling times in a short period of time.

[0054] Therefore, by making the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reach the target hydraulic pressure, the pipeline between the first two-way valve 12 and the second two-way valve 14 can be expanded and deformed in advance, and then the common end and the second end of the first three-way valve 16 are connected to release the pressure to normal pressure, and finally the second two-way valve 14 is closed to prepare for continuous sampling operations.

[0055] Based on the above method, after processing, although the pipeline between the first two-way valve 12 and the second two-way valve 14 undergoes expansion deformation that will occur during multiple samplings, the hydraulic pressure in the pipeline is still at normal pressure. On this basis, when multiple consecutive samplings are performed subsequently, the pipeline shape between the first two-way valve 12 and the second two-way valve 14 corresponding to the first few samplings and the pipeline shape between the first two-way valve 12 and the second two-way valve 14 corresponding to the subsequent multiple samplings will be relatively similar or the same, thereby making the sampling standards of multiple samplings relatively close or the same, improving the consistency of each sampling, that is, improving the repeatability of the sampling device, and thereby improving the accuracy of sample detection based on the samples obtained by the continuous sampling operation of the sampling device.

[0056] Optionally, after closing the second two-way valve 14 to prepare for continuous sampling, the control method further includes:

[0057] The first two-way valve 12 is opened, and the first suction and discharge module 13 is controlled to perform continuous sampling operations.

[0058] Specifically, after opening the first two-way valve 12 and ensuring that the second two-way valve 14 is closed, the first suction and exhalation module 13 can be controlled to provide negative pressure through the sampling needle 11 connected thereto to inhale the sample from the corresponding sample tube, and provide positive pressure to exhale the collected sample into the corresponding reaction pool. The above steps are repeated multiple times to complete continuous sampling to achieve continuous sample detection.

[0059] Optionally, closing the second two-way valve 14 to prepare for continuous sampling operation may include:

[0060] In response to the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaching the normal pressure of the outside air, the second two-way valve 14 is closed to prepare for continuous sampling operation.

[0061] Specifically, a pressure sensor may be provided on the pipeline between the first two-way valve 12 and the second two-way valve 14. The pressure sensor may be used to detect the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14. For example, the pressure sensor may be used to detect whether the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 has reached normal pressure.

[0062] The pressure sensor may be specifically located between the first two-way valve 12 and the first suction and discharge module 13 , or between the second two-way valve 14 and the first suction and discharge module 13 , which is not limited here.

[0063] After the pressure sensor detects that the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaches the normal pressure of the outside air, it is determined that the pressure relief of the pipeline between the first two-way valve 12 and the second two-way valve 14 has been completed. Therefore, the second two-way valve 14 can be closed at this time, so that the first suction and exhalation module 13 enters a state ready for continuous sampling operation.

[0064] Based on the above method, the pressure sensor can accurately determine the moment when the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaches normal pressure, and ensure that the second two-way valve 14 is closed after this moment, thereby ensuring that although the pipeline between the first two-way valve 12 and the second two-way valve 14 is deformed, the hydraulic pressure therein is at normal pressure, thereby improving the sampling accuracy during subsequent continuous sampling operations, and thereby improving the accuracy of sample detection.

[0065] Optionally, closing the second two-way valve 14 to prepare for continuous sampling operation may include:

[0066] In response to the second two-way valve 14 being opened for a time period greater than the second preset time threshold, the second two-way valve 14 is closed to prepare for a continuous sampling operation.

[0067] Specifically, when the time during which the second two-way valve 14 is opened to connect to the outside air through the first three-way valve 16 is greater than the second preset time threshold, it can be determined that the pressure relief of the pipeline between the first two-way valve 12 and the second two-way valve 14 has been completed. Therefore, the second two-way valve 14 can be closed at this time, so that the first suction and exhalation module 13 enters a state ready for continuous sampling operation.

[0068] Based on the above method, the second two-way valve 14 can be closed after the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaches normal pressure, thereby ensuring that although the pipeline between the first two-way valve 12 and the second two-way valve 14 is deformed, the hydraulic pressure therein is at normal pressure, thereby improving the sampling accuracy during subsequent continuous sampling operations, and thus improving the accuracy of sample detection.

[0069] In one embodiment, closing the second two-way valve 14 to prepare for sampling may include:

[0070] In response to the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaching the normal pressure of the outside air, the second two-way valve 14 is closed to prepare for the sampling operation.

[0071] Specifically, a pressure sensor may be provided on the pipeline between the first two-way valve 12 and the second two-way valve 14. The pressure sensor may be used to detect the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14. For example, the pressure sensor may be used to detect whether the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 has reached normal pressure.

[0072] The pressure sensor may be specifically located between the first two-way valve 12 and the first suction and discharge module 13 , or between the second two-way valve 14 and the first suction and discharge module 13 , which is not limited here.

[0073] After the pressure sensor detects that the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaches the normal pressure of the outside air, it is determined that the pressure relief of the pipeline between the first two-way valve 12 and the second two-way valve 14 has been completed. Therefore, the second two-way valve 14 can be closed at this time, so that the first suction and exhalation module 13 enters a state ready for sampling operation.

[0074] Based on the above method, the pressure sensor can accurately determine the moment when the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaches normal pressure, and ensure that the second two-way valve 14 is closed after this moment, thereby ensuring that the pipeline pressure relief in the pipeline between the first two-way valve 12 and the second two-way valve 14 is completed and becomes normal pressure, thereby improving the sampling accuracy during subsequent sampling operations, and thus improving the accuracy of sample detection.

[0075] In one embodiment, closing the second two-way valve 14 to prepare for sampling may include:

[0076] In response to the second two-way valve 14 being opened for a time period greater than the first preset time threshold, the second two-way valve 14 is closed to prepare for a sampling operation.

[0077] Specifically, when the time during which the second two-way valve 14 is opened to connect to the outside air through the first three-way valve 16 is greater than the first preset time threshold, it can be determined that the pressure relief of the pipeline between the first two-way valve 12 and the second two-way valve 14 has been completed. Therefore, the second two-way valve 14 can be closed at this time, so that the first suction and exhalation module 13 enters a state ready for sampling operation.

[0078] Based on the above method, the second two-way valve 14 can be closed after the hydraulic pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 reaches normal pressure, thereby ensuring that the pipeline pressure relief in the pipeline between the first two-way valve 12 and the second two-way valve 14 is completed and becomes normal pressure, thereby improving the sampling accuracy during subsequent sampling operations, and thus improving the accuracy of sample detection.

[0079] In one embodiment, the second suction and exhalation module 17 may specifically include a second three-way valve 171, the common end of the second three-way valve 171 can be connected to the first end of the first three-way valve 16, the first end of the second three-way valve 171 can be connected to the positive pressure unit, and the second end of the second three-way valve 171 can be connected to the negative pressure unit.

[0080] Specifically, the positive pressure unit can be used to provide positive pressure, and the negative pressure unit can be used to provide negative pressure. By connecting the common end of the second three-way valve 171 to the first end or the second end, positive pressure or negative pressure can be provided to the first three-way valve 16.

[0081] This application also proposes a sampling device, such as Figure 2 As shown, the sampling device includes a sampling needle 11, a first two-way valve 12, a first suction and exhalation module 13, a second two-way valve 14, a storage module 15, a first three-way valve 16, a second suction and exhalation module 17 and a control module (not shown).

[0082] One end of the sampling needle 11 is connected to one end of the first two-way valve 12, the other end of the first two-way valve 12 is connected to the first suction and exhalation module 13, the first suction and exhalation module 13 is connected to one end of the second two-way valve 14, the other end of the second two-way valve 14 is connected to the storage module 15, the storage module 15 is connected to the common end of the first three-way valve 16, the first end of the first three-way valve 16 is connected to the second suction and exhalation module 17, and the second end of the first three-way valve 16 is connected to the outside air.

[0083] The control module is used to:

[0084] In response to the positive pressure provided by the second suction and discharge module 17 , the cleaning liquid in the storage module 15 is pushed to complete the cleaning of the sampling device, and then the first two-way valve 12 is closed.

[0085] The second two-way valve 14 is kept open and the common end and the second end of the first three-way valve 16 are connected to complete the pressure relief.

[0086] The second two-way valve 14 is closed to prepare for sampling.

[0087] Specifically, the control module can also be used to execute the steps of the control method described in any of the above embodiments, which will not be repeated here.

[0088] Different from the prior art, in the technical solution of the present application, the sampling device includes a sampling needle 11, a first two-way valve 12, a first suction and exhalation module 13, a second two-way valve 14, a storage module 15, a first three-way valve 16, a second suction and exhalation module 17 and a control module. One end of the sampling needle 11 is connected to one end of the first two-way valve 12, the other end of the first two-way valve 12 is connected to the first suction and exhalation module 13, the first suction and exhalation module 13 is connected to one end of the second two-way valve 14, the other end of the second two-way valve 14 is connected to the storage module 15, the storage module 15 is connected to the common end of the first three-way valve 16, the first end of the first three-way valve 16 is connected to the second suction and exhalation module 17, and the second end of the first three-way valve 16 is connected to the outside air. In response to the positive pressure provided by the second suction and exhalation module 17, the cleaning liquid in the storage module 15 is pushed to complete the cleaning of the sampling device. Then: the first two-way valve 12 is closed; the second two-way valve 14 is kept open and the connection between the common end and the second end of the first three-way valve 16 is connected; and the second two-way valve 14 is closed. Based on the above method, after the sampling device is cleaned, first, the first two-way valve 12 located between the sampling needle 11 and the syringe is closed, and the second two-way valve 14 is kept open. Then, the common end and the second end of the first three-way valve 16 are connected, so that the positive pressure in the pipeline between the first two-way valve 12 and the second two-way valve 14 is released to the outside air. Finally, the second two-way valve 14 is closed to prepare for the sampling operation, thereby minimizing the possibility of deformation of the pipeline between the first two-way valve 12 and the second two-way valve 14, or minimizing the degree of deformation of the pipeline between the first two-way valve 12 and the second two-way valve 14, thereby improving the accuracy of subsequent sampling operations based on the sampling device and improving the accuracy of sample detection based on samples collected by the sampling device.

[0089] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0091] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0092] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (which can be a personal computer, server, network device, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0093] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control method for a sampling device, characterized in that: The sampling device includes a sampling needle, a first two-way valve, a first suction and exhalation module, a second two-way valve, a storage module, a first three-way valve and a second suction and exhalation module; One end of the sampling needle is connected to one end of the first two-way valve, the other end of the first two-way valve is connected to the first suction and exhalation module, the first suction and exhalation module is connected to one end of the second two-way valve, the other end of the second two-way valve is connected to the storage module, the storage module is connected to the common end of the first three-way valve, the first end of the first three-way valve is connected to the second suction and exhalation module, and the second end of the first three-way valve is connected to the outside air; The control method includes: In response to the second suction and discharge module providing positive pressure, the liquid in the storage module is pushed to complete the cleaning of the sampling device, and then the first two-way valve is closed; Keeping the second two-way valve open and connecting the common end and the second end of the first three-way valve to complete pressure relief; Close the second two-way valve to prepare for sampling.

2. The control method according to claim 1, characterized in that: After closing the second two-way valve to prepare for sampling, the control method further includes: The common end and the first end of the first three-way valve are connected.

3. The control method according to claim 1 or 2, characterized in that: When both the first two-way valve and the second two-way valve are closed, the control method further includes: In response to the sampling device being ready to perform a continuous sampling operation, the second two-way valve is opened, and the common end and the first end of the first three-way valve are connected; Controlling the second suction and discharge module to provide positive pressure; connecting the common end and the second end of the first three-way valve in response to the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve reaching a target hydraulic pressure; The second two-way valve is closed to prepare for the continuous sampling operation.

4. The control method according to claim 3, characterized in that: After closing the second two-way valve to prepare for the continuous sampling operation, the control method further includes: The first two-way valve is opened, and the first suction and discharge module is controlled to perform the continuous sampling operation.

5. The control method according to claim 3, characterized in that: The step of closing the second two-way valve to prepare for the continuous sampling operation includes: In response to the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve reaching the normal pressure of the external air, the second two-way valve is closed to prepare for the continuous sampling operation.

6. The control method according to claim 3, characterized in that: The step of closing the second two-way valve to prepare for the continuous sampling operation includes: In response to the second two-way valve being opened for a time period greater than a second preset time threshold, the second two-way valve is closed to prepare for the continuous sampling operation.

7. The control method according to claim 3, characterized in that: The target hydraulic pressure is the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve when the sampling device performs the continuous sampling operation.

8. The control method according to claim 1 or 2, characterized in that: The closing of the second two-way valve to prepare for the sampling operation includes: In response to the hydraulic pressure in the pipeline between the first two-way valve and the second two-way valve reaching the normal pressure of the external air, the second two-way valve is closed to prepare for the sampling operation.

9. The control method according to claim 1 or 2, characterized in that: The closing of the second two-way valve to prepare for the sampling operation includes: In response to the second two-way valve being opened for a time period greater than a first preset time period threshold, the second two-way valve is closed to prepare for a sampling operation.

10. A sampling device, characterized in that: It includes a sampling needle, a first two-way valve, a first suction and exhalation module, a second two-way valve, a storage module, a first three-way valve, a second suction and exhalation module and a control module; One end of the sampling needle is connected to one end of the first two-way valve, the other end of the first two-way valve is connected to the first suction and exhalation module, the first suction and exhalation module is connected to one end of the second two-way valve, the other end of the second two-way valve is connected to the storage module, the storage module is connected to the common end of the first three-way valve, the first end of the first three-way valve is connected to the second suction and exhalation module, and the second end of the first three-way valve is connected to the outside air; The control module is used for: In response to the second suction and discharge module providing positive pressure, the cleaning liquid in the storage module is pushed to complete the cleaning of the sampling device, and then the first two-way valve is closed; Keeping the second two-way valve open and connecting the common end and the second end of the first three-way valve to complete pressure relief; Close the second two-way valve to prepare for sampling.

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