A sample needle cleaning system and an in-vitro diagnostic device

Abstract

The application discloses a sample adding needle cleaning system and an in-vitro diagnosis device, and relates to the field of medical product cleaning equipment. The sample adding needle cleaning system comprises a cleaning device and a cleaning water channel. The cleaning device comprises a cleaning shell, a pressure cavity is arranged in the cleaning shell, and the head of the sample adding needle is inserted into the cleaning shell and located in the pressure cavity. The cleaning water channel is connected and communicated with the tail of the sample adding needle and is used for circulating pure water and / or cleaning liquid in the sample adding needle and the pressure cavity. During cleaning, the cleaning liquid enters the inner hole from the tail of the sample adding needle, flows out from the head into the pressure cavity after flushing the inner wall at a high flow rate, and simultaneously flushes the outer wall of the head, so that efficient cleaning of the inner wall of the sample adding needle and the outer wall of the head is realized. The application has excellent cleaning effect and can effectively remove viscous deposits in the sample adding needle.

Description

Technical Field

[0001] This application relates to the technical field of medical device cleaning equipment, and more specifically, to a needle cleaning system and in vitro diagnostic equipment. Background Technology

[0002] With increasing public awareness of health, the number of tests conducted in hospitals and testing centers is rapidly rising. The sampling needle is a key precision component in chemiluminescence analyzers, primarily used for sample or reagent aspiration, dispensing, and liquid level detection during automated analysis. In actual use of in vitro diagnostic instruments, contamination and residues in the sampling needle are significant causes of chemiluminescence analyzer failure. Therefore, reusable sampling needles require cleaning using specialized cleaning equipment.

[0003] Patent document CN120268729A discloses a needle cleaning device, including a body, a cleaning chamber, and a needle cleaning device composed of an air path and a water path. The inner wall of the cleaning chamber is provided with an air port communicating with the air path and a water port communicating with the water path. Multiple air ports are provided and are circumferentially distributed in a vortex shape. The water outlet direction of the water port is consistent with the air exhaust direction of the air port. The body is inserted with a needle to be cleaned, and the part of the needle to be cleaned is exposed in the cleaning chamber and is not in contact with the inner wall of the cleaning chamber. When the cleaning fluid is injected into the cleaning chamber from the water port along the water path, the cleaning fluid is affected by the airflow in the multiple air ports in the air path, so that the cleaning fluid forms a vortex in the cleaning chamber and cleans the needle.

[0004] In the aforementioned related technologies, the cleaning fluid is sprayed from the wall of the cleaning chamber and comes into contact with the outer wall of the injection needle. The fluid vortex intensity at the needle tip and inside the injection needle is not high, resulting in poor cleaning effect on the inner wall of the injection needle and making it difficult to clean the viscous deposits inside the needle.

[0005] In conclusion, how to improve the cleaning effect on the inside of the needle is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a needle cleaning system and in vitro diagnostic equipment that can effectively improve the internal cleaning effect of the needle.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A needle cleaning system, comprising:

[0009] A cleaning device, comprising a cleaning shell, wherein a pressure chamber is provided inside the cleaning shell, and the tip of a sampling needle is inserted into the cleaning shell and is located in the pressure chamber;

[0010] A cleaning water path is provided, which is connected to and communicates with the tail of the sampling needle. The cleaning water path is used to allow pure water and / or cleaning solution to flow through the sampling needle and the pressure chamber.

[0011] Preferably, the cleaning shell has a needle insertion hole that communicates with the pressure chamber. A sealing ring is coaxially fixed to the wall of the needle insertion hole, and the inner edge of the sealing ring abuts against the outer wall of the sample needle. A guide ring is provided inside the needle insertion hole, and the guide ring is detachably connected to the cleaning shell. The guide ring and the inner wall of the needle insertion hole abut against the sealing ring to fix the sealing ring.

[0012] Preferably, the cleaning device is provided with a guide seat, the guide seat has a supporting guide hole for the sample needle to pass through coaxially, the supporting guide hole and the needle body insertion hole are coaxial, the tail of the sample needle is provided with a bent section, and the connection point of the cleaning water channel and the sample needle is located at the port of the bent section away from the sample needle.

[0013] Preferably, the cleaning device is provided with a limiting device, the limiting device being located on one side of the cross-sectional projection of the supporting guide hole, and the bending section being located between the limiting device and the guide seat.

[0014] Preferably, the cleaning shell has multiple needle insertion holes, with each needle insertion hole allowing one sample needle to pass through. The cleaning water path is simultaneously connected to the tail of all the sample needles. The liquid flow direction of some sample needles is from tail to head, while the liquid flow direction of other sample needles is from head to tail.

[0015] Preferably, the cleaning water circuit includes a drive pump, a liquid tank, a supply line, a return line, and a working line. The liquid tank contains pure water and / or cleaning solution. The beginning of the supply line and the end of the return line are both connected to the liquid tank. The cleaning device is located in the middle of the working line. The end of the supply line and the beginning of the return line are respectively connected to the two ends of the working line. The drive pump is located in the supply line. The cleaning water circuit also includes a first reversing valve assembly located in the working line. The first reversing valve assembly is used to selectively connect the tail of a portion of the sampling needles to the supply line or the return line, and to selectively connect the tail of another portion of the sampling needles to the return line or the supply line.

[0016] Preferably, multiple liquid tanks are provided, and the cleaning water circuit further includes a second reversing valve assembly, which is used to selectively connect one of the liquid tanks to both the beginning of the supply pipeline and the end of the return pipeline at the same time.

[0017] Preferably, the cleaning device further includes a drain tank, the cleaning shell is located in the drain tank, the bottom of the drain tank is provided with a drain hole, the liquid tank includes a pure water tank and a cleaning liquid tank, the cleaning water circuit further includes a drain pipe, one end of the drain pipe is connected to the drain tank through the drain hole, and the other end is connected to the cleaning liquid tank.

[0018] Preferably, a pressure regulating valve is connected between the supply pipeline and the return pipeline, and the pressure regulating valve is connected in parallel with the working pipeline to achieve pipeline pressure regulation; the cleaning water circuit also includes a pressure sensor, which is located on the supply pipeline and between the working pipeline and the pressure regulating valve.

[0019] An in vitro diagnostic device, comprising any one of the above-mentioned needle cleaning systems.

[0020] The sampling needle cleaning system provided in this application involves inserting the head of the sampling needle into the cleaning shell and connecting the tail to the cleaning water channel. Pure water and / or cleaning solution flow through the cleaning water channel. The cleaning solution enters the sampling needle from the tail and flushes the inner wall of the sampling needle at a high flow rate and pressure. It then flows out from the head of the sampling needle into the pressure chamber. The liquid in the pressure chamber can then flush the outer wall of the sampling needle head, thereby effectively cleaning both the inner wall of the sampling needle and the outer wall of the head. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the needle cleaning system in the embodiments of this application, and it is a top-down viewing perspective.

[0023] Figure 2 This is a schematic diagram illustrating the structure of the cleaning device in the embodiments of this application;

[0024] Figure 3 This is a schematic diagram illustrating the internal structure of the cleaning shell in the embodiments of this application;

[0025] Figure 4 This is a schematic diagram illustrating the structure of the cleaning water circuit in the embodiments of this application. In the diagram, the cleaning liquid tank is connected to the cleaning water circuit, and the liquid flow direction in the cleaning device is from top to bottom.

[0026] Figure 5This is a schematic diagram illustrating the structure of the cleaning water path in an embodiment of this application. In the diagram, the pure water tank is connected to the cleaning water flow, and the liquid flow direction in the cleaning device is from bottom to top.

[0027] Figures 1-5 In the accompanying drawings, the reference numerals include:

[0028] 1. Sample dispensing needle; 11. Bending section; 2. Cleaning device; 21. Cleaning shell; 211. Pressure chamber; 212. Needle insertion hole; 213. Sealing ring; 214. Guide ring; 215. Drainage tank; 216. Drainage hole; 217. Stepped structure; 22. Guide seat; 221. Support guide hole; 23. Limiting device; 3. Supply pipeline; 31. Drive pump; 32. Pressure sensor; 4. Working pipeline; 41. Working reversing valve; 5. Return pipeline; 51. Pure water tank; 52. Cleaning liquid tank; 521. Drain pipe; 6. Pressure regulating valve; 7. Switching valve; 8. Control board. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. Embodiments of this application disclose a sample dispensing needle cleaning system and an in vitro diagnostic device.

[0031] The core of this application is to provide a needle cleaning system.

[0032] Please refer to Figures 1-3 .

[0033] The sample needle cleaning system provided in this application includes a cleaning device 2 and a cleaning water path. The cleaning device 2 includes a cleaning shell 21, and a pressure chamber 211 is provided inside the cleaning shell 21. The head of the sample needle 1 is inserted into the cleaning shell 21 and is located in the pressure chamber 211. There is a gap between the head of the sample needle 1 and the wall of the pressure chamber 211.

[0034] The cleaning water path is connected to and communicates with the tail of the sampling needle 1. The cleaning water path is used to allow pure water and / or cleaning solution to flow inside the sampling needle 1 and the pressure chamber 211. The cleaning water path can supply pure water or cleaning solution with a certain pressure to the inner hole of the sampling needle 1. The liquid flowing through the inner hole of the sampling needle 1 flows out from the head of the sampling needle 1 and enters the pressure chamber 211, so that the pressure chamber 211 is filled with flowing liquid.

[0035] Throughout the process, pure water or cleaning solution is used to flush the inner wall of the sample needle 1 and the outer wall of the head to achieve the purpose of cleaning. The high pressure and high flow rate improve the efficiency and effect of cleaning, and the viscous precipitates inside the sample needle 1 can be effectively flushed out, so that the inner wall of the sample needle 1 and the outer wall of the head can be effectively cleaned.

[0036] The sample needle cleaning system provided in this application will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0037] In one specific implementation, reference is made to... Figure 2 and Figure 3 The cleaning shell 21 has a needle insertion hole 212, which is connected to the pressure chamber 211. A sealing ring 213 is coaxially fixed to the wall of the needle insertion hole 212, and the inner edge of the sealing ring 213 fits against the outer wall of the sample needle 1. The sample needle 1 is inserted into the cleaning shell 21 through the needle insertion hole 212 and extends into the pressure chamber 211. The sealing ring 213 is sleeved on the outer circumference of the sample needle 1, and the inner edge of the sealing ring 213 fits tightly against the outer wall of the sample needle 1, thereby providing a certain clamping and fixing effect on the sample needle 1. At the same time, a seal is formed between the sample needle 1 and the cleaning shell 21, and the pressurized liquid in the pressure chamber 211 will not leak out through the needle insertion hole 212, ensuring the flushing pressure in the pressure chamber 211 and the inner hole of the sample needle 1.

[0038] Specifically, the sealing ring 213 is press-fitted to the wall of the needle insertion hole 212 via a guide ring 214 connected to or snapped into the cleaning housing 21 by threads. That is, the sealing ring 213 is sandwiched between the guide ring 214 and the cleaning housing 21, with the guide ring 214 and the needle insertion hole 212 coaxially arranged. This allows for easy disassembly and replacement of the sealing ring 213. The sealing ring 213 can be made of corrosion-resistant materials such as fluororubber or silicone rubber to adapt to the chemical environment of the cleaning solution.

[0039] Based on the above embodiments, refer to Figure 3 The cleaning device 2 is fixedly provided with a guide seat 22. The guide seat 22 has a support guide hole 221 for the sample needle 1 to pass through coaxially. The support guide hole 221 and the needle insertion hole 212 are coaxial.

[0040] After passing through the support guide hole 221 and the needle body insertion hole 212 in sequence, the sample needle 1 extends into the pressure chamber 211. The support guide hole 221 provides radial support and guidance for the sample needle 1, and together with the needle body insertion hole 212, ensures the coaxiality of the sample needle 1 after it is installed, so that the sample needle 1 can be accurately positioned and quickly disassembled in the cleaning device 2.

[0041] The tail of the sampling needle 1 is provided with a bent section 11. The connection point between the cleaning water channel and the sampling needle 1 is located at the port of the bent section 11 away from the sampling needle 1. The length direction of the bent section 11 forms an angle with the length direction of the sampling needle 1 itself, so that the bent section 11 cannot enter the support guide hole 221. That is, when the bent section 11 touches the guide seat 22, the sampling needle 1 cannot continue to penetrate into the cleaning shell 21. At this time, the head of the sampling needle 1 is in a suitable position in the pressure chamber 211. In this embodiment, the angle between the length directions of the bent section 11 and the sampling needle 1 is 90°, and there is a rounded transition between them.

[0042] Based on the above embodiments, refer to Figure 2 and Figure 3 The cleaning device 2 is equipped with a limiting device 23, which can be any structural component with limiting function, such as a fixed protrusion or a stop. The limiting device 23 is located on one side of the cross-sectional projection of the support guide hole 221. In this embodiment, the length direction of the support guide hole 221 is horizontal, and the limiting device 23 is located below the cross-section of the support guide hole 221. When installing the sampling needle 1, after the sampling needle 1 passes through the support guide hole 221 and the needle insertion hole 212 and is inserted into place, the bent section 11 should be exactly between the limiting device 23 and the guide seat 22. Then, the bent section 11 is made to droop downward. At this time, the limiting device 23 is within the height range of the bent section 11, and the limiting device 23 forms a backlash limit on the sampling needle 1. The sampling needle 1 cannot move laterally. After the water or cleaning fluid is circulated, the contact of the limiting device 23 with the bent section 11 makes the sampling needle 1 have higher state stability and can resist the axial thrust generated by the liquid on the sampling needle 1 during high-pressure rinsing.

[0043] When it is necessary to remove the sampling needle 1, the bent section is flipped upwards so that it is higher than the limiting device 23. The limiting device 23 can not block the retraction of the sampling needle 1, and the sampling needle 1 can be removed smoothly.

[0044] Based on the above embodiments, refer to Figure 3 The cleaning housing 21 has multiple needle insertion holes 212, with each needle insertion hole 212 allowing one sample needle 1 to pass through. The cleaning water path is simultaneously connected to the tail of all sample needles 1. The liquid provided by the cleaning water path cleans all sample needles 1. The liquid flow direction of some sample needles 1 is from tail to head, while the liquid flow direction of other sample needles 1 is from head to tail.

[0045] Taking a cleaning housing 21 with two needle insertion holes 212 as an example, the two needle insertion holes 212 are coaxial, and the pressure chamber 211 is located between them. Two sampling needles 1 are inserted into the cleaning housing 21 through their corresponding needle insertion holes 212, and the tails of both sampling needles 1 are connected to the cleaning water channel. During cleaning, the cleaning water channel directs the liquid in one of the sampling needles 1 from tail to head, i.e., it performs forward flushing on that sampling needle 1. The liquid washes its inner wall and then flows out from the head into the pressure chamber 211. At the same time, it directs the liquid in the other sampling needle 1 from head to tail, i.e., it performs reverse flushing on that sampling needle 1. The liquid in the pressure chamber 211 enters the inner hole from its head and flows out from its tail. Thus, the inner and outer walls of the two sampling needles 1 can be cleaned simultaneously in the same pressure chamber 211, and the flushing directions of the two sampling needles 1 are opposite, improving the flushing efficiency.

[0046] In another specific embodiment, multiple pressure chambers 211 may be provided in the same cleaning device 2, or the same cleaning device 2 may include multiple cleaning shells 21, and the number of pressure chambers 211 in each cleaning shell 21 may be different, so as to satisfy the simultaneous cleaning of multiple sample needles 1 in one go.

[0047] Based on the above embodiments, such as Figure 1 , Figure 4 and Figure 5 As shown, the cleaning water circuit includes a drive pump 31, a liquid tank, a supply pipe 3, a return pipe 5, and a working pipe 4. The liquid tank contains pure water and / or cleaning solution. The beginning of the supply pipe 3 and the end of the return pipe 5 are both connected to the liquid tank. The cleaning device 2 is located in the middle of the working pipe 4. The end of the supply pipe 3 is connected to the beginning of the working pipe 4, and the beginning of the return pipe 5 is connected to the end of the working pipe 4.

[0048] The drive pump 31 is located in the supply line 3. When the drive pump 31 is started, the liquid in the liquid tank enters the supply line 3, then enters the working line 4, and passes through the cleaning device 2 to clean the sampling needle 1. Then it flows from the working line 4 into the return line 5 and finally returns to the liquid tank, realizing the recycling of pure water or cleaning solution.

[0049] Preferably, the liquid tank may also be equipped with a partition device, such as a baffle structure, to divide the internal space of the liquid tank into multiple independent chambers, so as to separate the cleaned liquid from the unused liquid and prevent contamination.

[0050] The cleaning water circuit also includes a first reversing valve assembly located in the working pipeline 4. The first reversing valve assembly is used to selectively connect the tail of each sampling needle 1 to the supply pipeline 3 or the return pipeline 5, and simultaneously selectively connect the head of each sampling needle 1 to the return pipeline 5 or the supply pipeline 3, thus changing the direction of the liquid flowing inside each sampling needle 1. For several sampling needles 1 inserted into the same pressure chamber 211, the first reversing valve assembly is used to selectively connect the tail of some of the sampling needles 1 to the supply pipeline 3 or the return pipeline 5, and to selectively connect the tail of another portion of the sampling needles 1 to the return pipeline 5 or the supply pipeline 3.

[0051] The first reversing valve group includes multiple working reversing valves 41, the number of which is the same as the number of sampling needles 1. Taking the cleaning shell 21 with two needle insertion holes 212 as an example, two sampling needles 1 can be cleaned simultaneously in one operation.

[0052] Both working directional valves 41 are electromagnetic two-position three-way valves. One end of each valve is connected to the tail of the two sample needles 1 via a hose, and the other two ends are connected to the working line 4 and the return line 5, respectively. When one working directional valve 41 is connected to the working line 4, the other working directional valve 41 is connected to the return line 5. When one working directional valve 41 switches, the other working directional valve 41 switches synchronously. Thus, the liquid in one sample needle 1 flows from the tail to the head for forward flushing, and the liquid in the other sample needle 1 flows from the head to the tail for reverse flushing.

[0053] By switching the first reversing valve group, each sampling needle 1 can be alternately flushed in both the forward and reverse directions, and the deposits on the inner wall of the sampling needle 1 in all directions can be flushed off, thus improving the cleaning effect.

[0054] Based on the above embodiments, such as Figure 4 and Figure 5 As shown, there are multiple liquid tanks, each containing a different liquid used for cleaning, such as pure water, acidic cleaning solution, and alkaline cleaning solution. The cleaning water circuit also includes a second reversing valve assembly. This assembly is used to selectively connect one of the liquid tanks simultaneously to the beginning of the supply line 3 and the end of the return line 5. That is, at any given moment during the cleaning process, only one type of liquid flows through the working line 4. The second reversing valve assembly is used to switch between different liquids.

[0055] Specifically, the second reversing valve group includes two switching valves 7. One end of one switching valve 7 is connected to the working pipeline 4, and one end of the other switching valve 7 is connected to the return pipeline 5. The remaining ports of the two switching valves 7 are connected to each liquid tank respectively, and one of them can be turned on. In the cleaning state, the two switching valves 7 are connected to the same liquid tank, so that the liquid in this liquid tank passes through the working pipeline 4, the working pipeline 4, and the return pipeline 5 in sequence and finally flows back to the tank.

[0056] By switching the second reversing valve assembly, different cleaning media can be switched and rinsed without disassembling the sampling needle 1. Among the many liquid tanks, at least one tank contains pure water. When switching cleaning media, pure water is needed to rinse the residual liquid in the cleaning pipeline to avoid mixing of different media.

[0057] In a specific embodiment, such as Figure 4 and Figure 5 As shown, there are two liquid containers: a pure water container 51 for holding pure water and a cleaning solution container 52 for holding special cleaning solution.

[0058] The cleaning device 2 also includes a drain pool 215, a limiting device 23 located inside the drain pool 215, and the needle insertion hole 212 directly communicates with the inner cavity of the drain pool 215. When the sample needle 1 is disassembled and replaced, water or cleaning fluid will be spilled into the drain pool 215 from the pressure chamber 211.

[0059] Therefore, the cleaning water system also includes a drain pipe 521. A drain hole 216 is provided at the bottom of the drain tank 215. One end of the drain pipe 521 is connected to the drain tank 215 through the drain hole 216, and the other end is connected to the cleaning liquid tank 52. The drain pipe 521 is always kept unobstructed. Once liquid accumulates at the bottom of the drain tank 215, it will flow out through the drain hole 216 and into the cleaning liquid tank 52. Optionally, the inner wall of the drain tank 215 is provided with a multi-level stepped structure 217, with the drain hole 216 located on the lowest stepped plane, thereby ensuring that most of the liquid falling into the drain tank 215 can enter the drain hole 216.

[0060] Based on any of the above embodiments, such as Figure 4 and Figure 5 As shown, a pressure regulating valve 6 is connected between the supply pipeline 3 and the return pipeline 5, and the pressure regulating valve 6 is connected in parallel with the working pipeline 4.

[0061] The liquid output from the drive pump 31 is pressurized by the pressure regulating valve 6 and flows to the working pipeline 4 at a stable set pressure. When the downstream flow cross-section of the working pipeline 4 is small, for example, the inner hole of the sampling needle 1 is small, causing the pipeline pressure to rise, the portion of the liquid exceeding the set pressure overflows to the return pipeline 5 through the pressure regulating valve 6, thereby stabilizing the flushing pressure in the supply pipeline 3 at the set value. This ensures both the high-pressure flushing effect of the inner hole of the sampling needle 1 and avoids damage to the sampling needle 1 or the pipeline due to excessive pressure, thus ensuring stable operation of the cleaning device.

[0062] Furthermore, the cleaning water circuit also includes a pressure sensor 32, which is located in the supply line 3 and between the working line 4 and the pressure regulating valve 6, and is used to detect the liquid pressure in the supply line 3 in real time.

[0063] When the sampling needle 1 becomes blocked or the flow rate in the pipeline changes, the pressure in the supply pipeline 3 will change accordingly, and the pressure curve output by the pressure sensor 32 will change accordingly. By monitoring the change in the pressure curve, the fault status of the cleaning device can be detected, judged and warned in real time, such as the sampling needle 1 becoming blocked, no liquid in the pipeline, failure of the drive pump 31 or the reversing valve, abnormal liquid level in the liquid tank, etc., so as to promptly detect device faults and prompt handling.

[0064] Based on any of the above embodiments, such as Figures 1-5 As shown, the cleaning device also includes a control board 8 and buttons (not shown in the figure). The control board 8 is electrically connected to the drive pump 31, the first reversing valve group, the second reversing valve group, and the pressure sensor 32. The control board 8 has a built-in microcontroller, which can automatically complete the forward flushing, reverse flushing, and switching flushing of different cleaning media of the sampling needle 1 by automatically controlling the combination of the on and off states of each solenoid valve. The cleaning device has a high degree of integration and automation.

[0065] A short press of the button activates the control board 8, which automatically performs a fixed number of cleaning solution rinses according to a preset program. Forward and reverse rinsing alternate, and purified water rinsing is automatically performed after the cleaning solution rinsing is complete. The entire rinsing process requires no manual intervention. A long press of the button activates the drainage function on the control board 8, emptying residual liquid from the pipelines and cleaning device 2, facilitating the shutdown and maintenance of the cleaning device. During the rinsing process, the pressure sensor 32 monitors the system pressure in real time. The control board 8 uses changes in the pressure curve to determine abnormal conditions such as blocked needles, pipelines, and pumps / valvees, and issues alarms to promptly detect device malfunctions and improve instrument reliability.

[0066] This application also provides an in vitro diagnostic device, including the sample needle cleaning system of any of the above embodiments. The cleaning device and cleaning water circuit of the cleaning system are fixedly installed in the main structure of the in vitro diagnostic device (not shown in the figure). During the operation of in vitro diagnostics, the used sample needles can be immediately cleaned by the cleaning system without additional storage or transportation, thereby shortening the residual time of impurities in the sample needles and improving the cleaning effect.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The above provides a detailed description of the sample dispensing needle cleaning system and in vitro diagnostic device provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A sample dispensing needle cleaning system, characterized in that, include: The cleaning device (2) includes a cleaning shell (21) and a pressure chamber (211) is provided inside the cleaning shell (21). The head of the sampling needle (1) is inserted into the cleaning shell (21) and is in the pressure chamber (211). The cleaning water path is connected to and communicates with the tail of the sample dispensing needle (1). The cleaning water path is used to allow pure water and / or cleaning solution to flow in the sample dispensing needle (1) and the pressure chamber (211).

2. The sample dispensing needle cleaning system according to claim 1, characterized in that, The cleaning shell (21) has a needle insertion hole (212), which is connected to the pressure chamber (211). A sealing ring (213) is coaxially fixed on the hole wall of the needle insertion hole (212), and the inner edge of the sealing ring (213) is in contact with the outer wall of the sample needle (1). The needle insertion hole (212) is provided with a guide ring (214). The guide ring (214) and the cleaning shell (21) are detachably connected. The inner walls of the guide ring (214) and the needle insertion hole (212) simultaneously abut against the sealing ring (213) to fix the sealing ring (213).

3. The sample dispensing needle cleaning system according to claim 2, characterized in that, The cleaning device (2) is provided with a guide seat (22), and the guide seat (22) has a support guide hole (221) through which the sample needle (1) passes coaxially. The support guide hole (221) and the needle body insertion hole (212) are coaxial. The tail of the sample needle (1) is provided with a bent section (11). The connection point between the cleaning water channel and the sample needle (1) is located at the port of the bent section (11) away from the sample needle (1).

4. The sample dispensing needle cleaning system according to claim 3, characterized in that, The cleaning device (2) is provided with a limiting device (23), which is located on one side of the cross-sectional projection of the support guide hole (221). The bending section (11) is located between the limiting device (23) and the guide seat (22).

5. The needle cleaning system according to any one of claims 2-4, characterized in that, The cleaning shell (21) has multiple needle insertion holes (212), and each needle insertion hole (212) allows one sample needle (1) to pass through. The cleaning water path is simultaneously connected to the tail of all the sample needles (1). The liquid flow direction of some of the sample needles (1) is from the tail to the head, and the liquid flow direction of other sample needles (1) is from the head to the tail.

6. The sample dispensing needle cleaning system according to claim 5, characterized in that, The cleaning water circuit includes a drive pump (31), a liquid tank, a supply pipe (3), a return pipe (5), and a working pipe (4). The liquid tank contains pure water and / or cleaning solution. The beginning of the supply pipe (3) and the end of the return pipe (5) are both connected to the liquid tank. The cleaning device (2) is located in the middle of the working pipe (4). The end of the supply pipe (3) and the beginning of the return pipe (5) are respectively connected to the two ends of the working pipe (4). The drive pump (31) is located in the supply pipe (3). The cleaning water circuit also includes a first reversing valve assembly located in the working pipeline (4). The first reversing valve assembly is used to selectively connect the tail of a portion of the sample needles (1) to the supply pipeline (3) or the return pipeline (5), and to selectively connect the tail of another portion of the sample needles (1) to the return pipeline (5) or the supply pipeline (3).

7. The sample dispensing needle cleaning system according to claim 6, characterized in that, The liquid tanks are provided in multiple ways, and the cleaning water circuit also includes a second reversing valve group. The second reversing valve group is used to selectively connect one of the liquid tanks to the beginning of the supply pipeline (3) and the end of the return pipeline (5) at the same time.

8. The sample dispensing needle cleaning system according to claim 7, characterized in that, The cleaning device also includes a drain tank, the cleaning shell is located in the drain tank, the bottom of the drain tank is provided with a drain hole, the liquid tank includes a pure water tank (51) and a cleaning liquid tank (52), the cleaning water path also includes a drain pipe (521), one end of the drain pipe (521) is connected to the drain tank (215) through the drain hole 216, and the other end is connected to the cleaning liquid tank (52).

9. The sample dispensing needle cleaning system according to claim 6, characterized in that, A pressure regulating valve (6) is connected between the supply pipeline (3) and the return pipeline (5). The pressure regulating valve (6) is connected in parallel with the working pipeline (4) to achieve pipeline pressure regulation. The cleaning water circuit also includes a pressure sensor (32), which is located on the supply line (3) and between the working line (4) and the pressure regulating valve (6).

10. An in vitro diagnostic device, comprising the needle cleaning system as described in any one of claims 1-9.

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