A sample needle cleaning device

Abstract

The utility model provides a kind of sample adding needle cleaning device, including cleaning pedestal, first cleaning part, second cleaning part and waste liquid discharge port. First cleaning cavity and second cleaning cavity are vertically communicated and arranged in cleaning pedestal, first cleaning cavity is located above needle tube outer wall, and second cleaning cavity is located below needle head position. First cleaning part includes first liquid inlet joint and first liquid outlet joint, and the height difference of the two forms liquid level drop, and first liquid injection pump and first liquid outlet pump are connected respectively;Second cleaning part is same structure, and independently communicates second cleaning cavity. Waste liquid discharge port is arranged in the bottom of pedestal and communicates second cleaning cavity. The device is designed by double-cavity partition, combined with liquid level drop flushing and independent pump control process, to realize the precise and efficient cleaning of needle tube outer wall and needle head tip, completely solve the problem of single sink cleaning blind area, significantly reduce the risk of cross contamination.

Description

Technical Field

[0001] This utility model relates to the field of sample needle cleaning technology, and more specifically, to a sample needle cleaning device. Background Technology

[0002] In modern medical testing and scientific research, the cleanliness of the sampling needle, as a key component of the testing instrument, directly affects the accuracy and reliability of the test results. During operation, the sampling needle needs to collect different samples frequently; to prevent cross-contamination between samples, the needle must be thoroughly cleaned after each collection.

[0003] Currently, most sample needle cleaning devices on the market use a single water tank cleaning mode. This mode mainly relies on the flushing action of water to remove impurities from the surface of the sample needle. Although simple to operate, it has many drawbacks. The single water tank cleaning mode is seriously insufficient in terms of cleaning range and effectiveness. Its cleaning process often only covers a part of the outer wall of the sample needle tube, making it difficult to effectively clean the most contaminated needle tip and the inside of the syringe. The needle tip directly contacts the sample, and the possibility of residual impurities is high; the inside of the syringe is a critical channel for sample transmission, and even a small residue can cause cross-contamination. This cleaning method makes it difficult for the sample needle to achieve the required cleanliness standard, which not only increases the risk of sample cross-contamination, but may also interfere with subsequent detection data, causing experimental results to be biased or even erroneous, greatly affecting the efficiency of testing and the credibility of scientific conclusions. Utility Model Content

[0004] The technical problem to be solved by this application is that the existing single water tank mode cannot cover the cleaning of needles. In order to overcome the above-mentioned defects of the prior art, this application provides a sample needle cleaning device.

[0005] This application provides a needle cleaning device, comprising: a cleaning base having a first cleaning chamber and a second cleaning chamber arranged vertically inside, the first and second cleaning chambers being interconnected for inserting a needle, the first cleaning chamber being located above the second cleaning chamber and adapted to the outer wall of the needle tube, and the second cleaning chamber being adapted to the position of the needle tip; a first cleaning section including a first inlet connector and a first outlet connector communicating with the first cleaning chamber, the outlet end of the first inlet connector being higher than the inlet end of the first outlet connector, the inlet end of the first inlet connector being connected to a first injection pump, and the outlet end of the first outlet connector being connected to a first outlet pump; a second cleaning section including a second inlet connector and a second outlet connector communicating with the second cleaning chamber, the outlet end of the second inlet connector being higher than the inlet end of the second outlet connector, the inlet end of the second inlet connector being connected to a second injection pump, and the outlet end of the second outlet connector being connected to a second outlet pump; and a waste liquid discharge port located at the bottom of the cleaning base, the waste liquid discharge port being connected to the second cleaning chamber.

[0006] Compared with existing technologies, the sample dispensing needle cleaning device disclosed in this application has the following advantages: the first cleaning chamber is adapted to clean the outer wall of the needle tube, and the second cleaning chamber is adapted to the position of the needle tip, realizing precise cleaning of the needle tube and the needle tip, solving the problem that the existing single water tank cannot cover the contamination of the needle tip, and improving the comprehensiveness of cleaning; the outlet end of the liquid inlet connector is higher than the inlet end of the liquid outlet connector, forming a water flow flushing path with a height difference, which enhances the flushing force of the water flow on the surface of the sample dispensing needle, effectively removes impurities, avoids residues, and reduces the risk of sample cross-contamination; the injection pump and the outlet pump control the flow rate and flow velocity respectively, and the cleaning parameters can be adjusted according to different contamination levels to improve cleaning efficiency and targeting.

[0007] In one possible implementation, the axis of the first inlet connector is inclined at an acute angle to the insertion direction of the sample needle, and the axis of the first outlet connector is parallel to the axis of the first inlet connector. Compared with the prior art, the acutely inclined first inlet connector causes the water flow to impact the surface of the sample needle at a certain angle, forming an oblique scouring flow that covers a wider area of ​​the needle tube's outer wall, resulting in more thorough cleaning compared to vertical water flow. The parallel alignment of the first outlet connector with the first inlet connector ensures consistent water flow direction, avoids cleaning blind spots caused by turbulence, and improves water utilization.

[0008] In one possible implementation, the axial direction of the first inlet connector forms an angle of 30-60 degrees with the insertion direction of the sample needle. Compared with the prior art, the 30-60 degree angle balances the water flow impact force and coverage area: if the angle is too small, the water flow scouring force is insufficient; if the angle is too large, it will easily cause water splashing. This angle range can maximize the removal of impurities from the outer wall of the syringe while reducing liquid loss.

[0009] In one possible implementation, an air blowing connector mounted on the cleaning base is also included. The air outlet of the air blowing connector is connected to the first cleaning chamber, and the air inlet of the air blowing connector is connected to an external air pump. Compared with the prior art, after cleaning, the airflow quickly dries the residual liquid on the surface of the syringe, preventing sample dilution or cross-contamination caused by liquid residue and improving the accuracy of subsequent sample addition. At the same time, the airflow can blow away the tiny particulate impurities remaining after cleaning, further improving the cleanliness.

[0010] In one possible implementation, a blow seat is fixedly disposed at the top of the first cleaning chamber. The blow seat has an inner hole and multiple air holes communicating with the inner hole. The inner hole is used for the sample needle to pass through and enter the first cleaning chamber. The multiple air holes are evenly spaced around the inner hole and communicate with the air outlet of the blow connector. Compared with the prior art, the evenly distributed air holes in the circumference allow the airflow to form a 360-degree annular sweep, covering the needle tube without dead corners, ensuring uniform drying and avoiding local residue.

[0011] In one possible implementation, the axial direction of the vent is inclined at an acute angle to the insertion direction of the sample needle. Compared with the prior art, the acute-angled vent allows the airflow to sweep along the tangential direction of the needle surface, enhancing the airflow carrying effect on the outer wall of the needle, resulting in faster drying and assistance in removing residual impurities.

[0012] In one possible implementation, the top of the cleaning base is provided with a fixing plate and a sealing element. The fixing plate presses and seals the air blowing seat onto the cleaning base through the sealing element. Compared with the prior art, the sealing element prevents airflow leakage, ensures stable air blowing pressure, and improves drying efficiency; at the same time, it prevents cleaning fluid from seeping into the air blowing system and prevents equipment damage; the fixing plate fixes the air blowing seat, preventing components from loosening due to vibration during long-term use and ensuring the stability of the device.

[0013] In one possible implementation, the cleaning base is equipped with a mounting plate for securing the entire device. Compared to existing technologies, the mounting plate provides a standard interface, facilitating integration into biochemical detection equipment, adapting to different models, and improving equipment compatibility. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of this application. Figure 2 ;

[0016] Figure 3 This is a diagram illustrating the usage status of this application;

[0017] Figure 4 for Figure 3 Enlarged view of point A;

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Cleaning base; 11. First cleaning chamber; 12. Second cleaning chamber; 13. Waste liquid outlet; 2. First cleaning section; 21. First liquid inlet connector; 22. First liquid outlet connector; 23. First injection pump; 24. First liquid outlet pump; 3. Second cleaning section; 31. Second liquid inlet connector; 32. Second liquid outlet connector; 33. Second injection pump; 34. Second liquid outlet pump; 4. Air blowing connector; 41. Air pump; 5. Air blowing seat; 51. Inner hole; 52. Air hole; 6. Fixing plate; 7. Sealing element; 8. Mounting plate; 9. Sampling needle; 10. Negative pressure pump. Detailed Implementation

[0020] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0021] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0022] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] See Figures 1 to 4This application discloses a sampling needle cleaning device, comprising: a cleaning base 1, a first cleaning section 2, a second cleaning section 3, and a waste liquid outlet 13; the cleaning base 1 has a first cleaning chamber 11 and a second cleaning chamber 12 arranged vertically inside, the first cleaning chamber 11 and the second cleaning chamber 12 are interconnected for inserting a sampling needle 9, the first cleaning chamber 11 is located above the second cleaning chamber 12 and is adapted to the outer wall of the needle tube of the sampling needle 9, and the second cleaning chamber 12 is adapted to the position of the needle tip of the sampling needle 9; the first cleaning section 2 includes a first liquid inlet connector 21 and a first liquid outlet connector 22 communicating with the first cleaning chamber 11, the outlet end of the first liquid inlet connector 21 being higher than the height of the first liquid inlet connector 21. The height of the inlet end of the first liquid outlet connector 22 is higher than the height of the inlet end of the second liquid outlet connector 32. The inlet end of the first liquid inlet connector 21 is connected to the first liquid injection pump 23, and the outlet end of the first liquid outlet connector 22 is connected to the first liquid outlet pump 24. The second cleaning section 3 includes a second liquid inlet connector 31 and a second liquid outlet connector 32 that communicate with the second cleaning chamber 12. The height of the outlet end of the second liquid inlet connector 31 is higher than the height of the inlet end of the second liquid outlet connector 32. The inlet end of the second liquid inlet connector 31 is connected to the second liquid injection pump 33, and the outlet end of the second liquid outlet connector 32 is connected to the second liquid outlet pump 34. The waste liquid outlet 13 is located at the bottom of the cleaning base 1 and communicates with the second cleaning chamber 12.

[0025] The cleaning base 1 can be integrally molded from high-strength, corrosion-resistant engineering plastics or metal materials to ensure its structural strength and service life. The first cleaning chamber 11 and the second cleaning chamber 12 are formed by opening vertical channels inside the cleaning base 1. The diameter of the first cleaning chamber 11 is slightly larger than the diameter of the sample needle 9 tube body so that the sample needle 9 can be inserted smoothly. The diameter of the second cleaning chamber 12 is adapted to the needle tip of the sample needle 9, which can accurately accommodate the needle tip and achieve targeted cleaning. The first cleaning chamber 11 and the second cleaning chamber 12 are connected by a transition channel to ensure the flow of cleaning fluid from top to bottom. In the first cleaning section 2, the first inlet connector 21 and the first outlet connector 22 are made of acid and alkali resistant pipes, which are fixed to the cleaning base 1 by threaded connection or welding. The outlet end of the first inlet connector 21 is higher than the inlet end of the first outlet connector 22, forming a certain liquid level difference to facilitate the natural flow of cleaning fluid in the first cleaning chamber 11. The first injection pump 23 is a high-precision peristaltic pump, which can accurately control the injection volume and injection speed of cleaning fluid. The first outlet pump 24 is a self-priming centrifugal pump, which can quickly extract waste liquid from the first cleaning chamber 11. The installation method of the second inlet connector 31 and the second outlet connector 32 of the second cleaning section 3 is similar to that of the first cleaning section 2, which also ensures that the outlet end of the second inlet connector 31 is higher than the inlet end of the second outlet connector 32. The second injection pump 33 and the second outlet pump 34 are selected with the same pump type as those of the first cleaning section 2, and are used to inject cleaning fluid into the second cleaning chamber 12 and discharge waste liquid, respectively. Waste liquid outlet 13 is located at the lowest position at the bottom of the cleaning base 1 and is connected to an external waste liquid collection container through a pipe to ensure that the waste liquid in the cleaning chamber can be discharged smoothly by gravity.

[0026] In this embodiment, the axis of the first liquid inlet connector 21 is inclined at an acute angle to the insertion direction of the sampling needle 9, and the axis of the first liquid outlet connector 22 is parallel to the axis of the first liquid inlet connector 21. To achieve a better cleaning effect, the axis of the first liquid inlet connector 21 forms an angle of 30-60 degrees with the insertion direction of the sampling needle 9. Specifically, when installing the first liquid inlet connector 21, its axis is inclined at an acute angle to the insertion direction of the sampling needle 9, which can be achieved by opening an inclined mounting hole on the cleaning base 1. The axis of the first liquid outlet connector 22 is parallel to the axis of the first liquid inlet connector 21, and is also fixed by opening a corresponding inclined mounting hole on the cleaning base 1. This arrangement allows the cleaning fluid injected by the first liquid inlet connector 21 to impact the surface of the sampling needle 9 at a certain angle, forming a more effective rinsing effect. At the same time, the first liquid outlet connector 22 can smoothly discharge waste liquid, avoiding the formation of eddies in the cleaning fluid within the first cleaning chamber 11, thus improving cleaning efficiency.

[0027] In this embodiment, the device further includes an air blowing connector 4 mounted on the cleaning base 1. The air outlet of the air blowing connector 4 is connected to the first cleaning chamber 11, and the air inlet of the air blowing connector 4 is connected to an external air pump 41. Specifically, the air blowing connector 4 adopts a quick-connect connector for easy connection and disconnection with the external air pump 41; the air outlet of the air blowing connector 4 is connected to the first cleaning chamber 11, and the connection method can be a compression fitting to ensure the sealing of the connection; the external air pump 41 is a small high-pressure air pump 41, which can provide a stable high-pressure airflow; after the sampling needle 9 has been cleaned, the external air pump 41 is started, and the high-pressure airflow enters the first cleaning chamber 11 through the air blowing connector 4 to blow and dry the surface of the sampling needle 9, effectively removing the residual cleaning liquid on the surface of the sampling needle 9 and preventing water stains from affecting subsequent sampling operations. When it is necessary to clean the air passages inside the device, the air inlet of the air blowing connector 4 can be connected to the external cleaning pump for easy cleaning.

[0028] In this embodiment, an air blowing seat 5 is fixedly provided on the top of the first cleaning chamber 11. The air blowing seat 5 has an inner hole 51 and multiple air holes 52 communicating with the inner hole 51. The inner hole 51 is used for the sample needle 9 to pass through and enter the first cleaning chamber 11. The multiple air holes 52 are evenly distributed around the circumference of the inner hole 51 and communicate with the air outlet of the air blowing connector 4. The axial direction of the air holes 52 is inclined at an acute angle to the insertion direction of the sample needle 9. For example, the angle between the axis of the air holes 52 and the insertion direction of the sample needle 9 can be set between 30 and 60 degrees to achieve the best drying effect. Specifically, the air blowing seat 5 is injection molded from high-temperature resistant and wear-resistant plastic material. It has an inner hole 51 in the center that is adapted to the sample needle 9. The size of the inner hole 51 is slightly larger than the diameter of the sample needle 9 to ensure that the sample needle 9 can pass through smoothly. Multiple air holes 52 are evenly distributed around the circumference of the inner hole 51. For example, 4-6 air holes 52 can be set, and the diameter of the air holes 52 is 1-2 mm. Each air hole 52 is connected to the air outlet of the air blowing connector 4 through an internal channel. The sample needle 9 passes through the inner hole 51, and the high-pressure airflow is sprayed out from the air holes 52, which acts evenly on the surface of the sample needle 9 to achieve all-round air blowing and drying.

[0029] In this embodiment, the top of the cleaning base 1 is provided with a fixing plate 6 and a sealing element 7. The fixing plate 6 presses and seals the air blowing seat 5 onto the cleaning base 1 through the sealing element 7. Specifically, the top of the cleaning base 1 is pre-machined with an installation groove for placing the air blowing seat 5; the sealing element 7 is an oil-resistant and acid- and alkali-resistant rubber sealing ring, which is placed between the air blowing seat 5 and the cleaning base 1; the fixing plate 6 is fixed to the cleaning base 1 with bolts. During installation, the bolts are tightened so that the fixing plate 6 presses and seals the air blowing seat 5 onto the cleaning base 1 through the sealing element 7, ensuring the sealing of the first cleaning chamber 11, preventing high-pressure air leakage, and ensuring the effectiveness of the air blowing drying process.

[0030] In this embodiment, a mounting plate 8 is provided on the cleaning base 1 for fixing the entire device. Specifically, the mounting plate 8 is made of metal and is fixed to the bottom of the cleaning base 1 by bolt connection; the mounting plate 8 has multiple mounting holes, the size and position of which are adapted to the mounting bracket of the laboratory equipment or instrument; in actual installation, bolts or screws are used to connect the mounting plate 8 to the equipment bracket, thereby firmly fixing the entire cleaning device in the designated position, ensuring that the device remains stable during operation and will not shift or loosen due to vibration or other factors.

[0031] This embodiment describes a needle cleaning device. During operation, the needle 9 is placed into the first cleaning chamber 11 and the second cleaning chamber of the cleaning base 1. A first injection pump 23 injects cleaning fluid into the first cleaning chamber 11 via a first inlet connector 21. The outlet end of the inlet connector is higher than the inlet end of the outlet connector, creating a drop in water flow to flush the outer wall of the needle tube. A first outlet pump 24 discharges waste liquid via a first outlet connector 22. The second cleaning section 3 operates similarly. Simultaneously with cleaning the outer wall of the needle, the needle 9 is aspirated by a negative pressure pump 10, drawing in a certain amount of cleaning agent to soak the inner wall of the needle 9. After a predetermined time, the inner wall of the needle 9 is cleaned before the waste liquid is discharged. The waste liquid is discharged through the waste liquid outlet 13 at the bottom of the base. After cleaning, an external air pump 41 delivers high-pressure airflow to the first cleaning chamber 11 via an air blowing connector 4. The high-pressure airflow is ejected at an acute angle through the circumferentially distributed air holes 52 of the air blowing seat 5, circumferentially sweeping the needle tube, drying residual liquid, and removing impurities. The beneficial effects include:

[0032] I. Precise Zoned Cleaning: Through the first cleaning chamber 11 (adapted to the outer wall of the syringe) and the second cleaning chamber 12 (adapted to the needle position) connected vertically, zoned targeted cleaning of the syringe and the most heavily contaminated needle tip is achieved, completely solving the defect that the single water tank mode cannot cover the needle and the inside of the syringe, and significantly improving the comprehensiveness of cleaning.

[0033] II. High-efficiency flushing and decontamination: The height of the outlet end of the liquid inlet connector is higher than that of the inlet end of the liquid outlet connector, forming a water flow path with liquid level difference, which enhances the flushing force; combined with the acute angle tilt design of the first liquid inlet connector 21 and the sample needle 9, the water flow impacts the needle wall obliquely, expands the coverage area and avoids vertical flushing dead corners, effectively removes residual impurities and reduces the risk of cross-contamination.

[0034] III. Independent and Controllable Cleaning Process: Both cleaning units are equipped with independent injection and discharge pumps, allowing for precise control of flow rate, velocity, and cleaning time to adapt to different levels of contamination, thus improving cleaning efficiency and targeting. The needle in the second cleaning chamber 12 can actively aspirate liquid, achieving immersion cleaning of the inner wall.

[0035] IV. Residue-free drying: The air blowing connector 4, in conjunction with the circumferentially evenly distributed, acutely inclined air holes 52, forms an annular airflow that sweeps along the tangential direction of the needle surface, quickly drying residual liquid and carrying away particles, preventing sample dilution or secondary contamination, and ensuring the accuracy of subsequent sample addition.

[0036] V. Stable sealing and compatibility: The sealing element 7 and the fixing plate 6 ensure the sealing performance and long-term stability of the air blowing system; the mounting plate 8 provides a standardized interface, which is convenient for integration into various biochemical detection equipment, improving compatibility and operational reliability.

[0037] 6. By using a liquid injection pump, the pump can be connected to an external cleaning solution pipeline, ensuring that the cleaning solution is always a flowing liquid, thus avoiding the use of cleaning bottles and preventing an increase in the workload of handling cleaning bottles; eliminating the use of cleaning bottles reduces the space occupied in the reagent compartment.

[0038] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0039] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sample dispensing needle cleaning device, characterized in that, include: The cleaning base has a first cleaning chamber and a second cleaning chamber arranged vertically inside. The first cleaning chamber and the second cleaning chamber are interconnected for inserting a sampling needle. The first cleaning chamber is located above the second cleaning chamber and is adapted to the outer wall of the needle tube of the sampling needle. The second cleaning chamber is adapted to the position of the needle tip of the sampling needle. The first cleaning unit includes a first liquid inlet connector and a first liquid outlet connector that communicate with the first cleaning chamber. The height of the outlet end of the first liquid inlet connector is higher than the height of the inlet end of the first liquid outlet connector. The inlet end of the first liquid inlet connector is connected to a first injection pump, and the outlet end of the first liquid outlet connector is connected to a first liquid outlet pump. The second cleaning unit includes a second liquid inlet connector and a second liquid outlet connector that communicate with the second cleaning chamber. The height of the outlet end of the second liquid inlet connector is higher than the height of the inlet end of the second liquid outlet connector. The inlet end of the second liquid inlet connector is connected to a second injection pump, and the outlet end of the second liquid outlet connector is connected to a second liquid outlet pump. The waste liquid outlet is located at the bottom of the cleaning base and is connected to the second cleaning chamber.

2. The sample dispensing needle cleaning device according to claim 1, characterized in that, The axis of the first liquid inlet connector is inclined at an acute angle to the insertion direction of the sample needle, and the axis of the first liquid outlet connector is parallel to the axis of the first liquid inlet connector.

3. The sample dispensing needle cleaning device according to claim 2, characterized in that, The axial direction of the first liquid inlet connector forms an angle of 30-60 degrees with the insertion direction of the sample needle.

4. The sample dispensing needle cleaning device according to claim 1, characterized in that, It also includes an air blowing connector installed on the cleaning base, the air outlet of the air blowing connector being connected to the first cleaning chamber, and the air inlet of the air blowing connector being connected to an external air pump.

5. The sample dispensing needle cleaning device according to claim 4, characterized in that, A blow seat is fixedly provided at the top of the first cleaning chamber. The blow seat has an inner hole and multiple air holes that communicate with the inner hole. The inner hole is used for the sample needle to pass through and enter the first cleaning chamber. The multiple air holes are evenly spaced around the inner hole and communicate with the air outlet of the blow connector.

6. The sample dispensing needle cleaning device according to claim 5, characterized in that, The axial direction of the pore is inclined at an acute angle to the insertion direction of the sample needle.

7. The sample dispensing needle cleaning device according to claim 5, characterized in that, The top of the cleaning base is provided with a fixing plate and a sealing element. The fixing plate presses and seals the air blowing seat onto the cleaning base through the sealing element.

8. The sample dispensing needle cleaning device according to claim 1, characterized in that, The cleaning base is equipped with a mounting plate for fixing the entire device.

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