Sample analyzer

Abstract

The sample analyzer comprises a driving assembly and a pipetting needle arranged on the driving assembly, the driving assembly is used for driving the pipetting needle to move between different operation positions on the sample analyzer so as to suck or discharge target liquid, and the target liquid comprises at least one of a sample and a reagent. The cleaning mechanism comprises a cleaning pool and an ultrasonic cleaning assembly, the cleaning pool is provided with a cleaning cavity and a needle inlet channel communicated with the cleaning cavity, the cleaning cavity is used for containing cleaning liquid, a to-be-cleaned pipetting needle is inserted into the cleaning cavity through the needle inlet channel, and the cleaning pool is provided with an opening communicated with the cleaning cavity; the ultrasonic cleaning assembly comprises an ultrasonic driving part and a vibration part connected with the ultrasonic driving part, the end, away from the ultrasonic driving part, of the vibration part extends into the cleaning cavity through the opening and obliquely extends downwards, and the end of the vibration part and the side wall of the cleaning pool are spaced to form a cleaning channel communicated with the needle inlet channel. According to the sample analyzer, the vibration part can form a downward vibration component, and the cleaning effect on the tip of the pipetting needle is good.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a sample analyzer. Background Art

[0002] Sample analyzers, such as biochemical analyzers, are medical devices used to detect various analytical indicators of blood, urine or other body fluids. When using sample analysis devices to detect various analytical indicators, pipettes are required to process samples or reagents. During the operation of the sample analyzer, the pipette needle will come into contact with different liquid media. In order to eliminate the carryover contamination between different media, the pipette needle needs to be cleaned and maintained to eliminate cross contamination between different media and ensure the accuracy of the test results.

[0003] The existing pipette needle cleaning is usually designed to drive the bottom or side of the cleaning tank to vibrate with an ultrasonic transducer, driving the cleaning liquid to vibrate to clean the pipette needle in the cleaning tank. This solution has a lot of invalid vibrations, that is, the ultrasonic power density is low, and more energy is consumed to achieve the cleaning effect, and the cleaning effect is not good. Utility Model Content

[0004] In view of this, the utility model proposes a sample analyzer.

[0005] The sample analyzer proposed by the utility model comprises:

[0006] a dispensing mechanism, the dispensing mechanism comprising a driving assembly and a pipette needle disposed on the driving assembly, the driving assembly being used to drive the pipette needle to move between different operating positions on the sample analyzer to absorb or discharge a target liquid, the target liquid comprising at least one of a sample and a reagent;

[0007] A cleaning mechanism, the cleaning mechanism comprises a cleaning tank and an ultrasonic cleaning component, the cleaning tank is provided with a cleaning cavity and a needle insertion channel connected to the cleaning cavity, the cleaning cavity is used to accommodate cleaning liquid, a pipette needle to be cleaned is inserted into the cleaning cavity through the needle insertion channel, the cleaning tank is provided with an opening connected to the cleaning cavity; the ultrasonic cleaning component comprises an ultrasonic driving part and a vibrating part connected to the ultrasonic driving part, one end of the vibrating part away from the ultrasonic driving part extends into the cleaning cavity through the opening and extends obliquely downward, and the end of the vibrating part is spaced from the side wall of the cleaning tank to form a cleaning channel connected to the needle insertion channel.

[0008] It can be seen from the above technical solution that the sample analyzer proposed by the utility model performs ultrasonic cleaning on the pipette needle by setting the vibrating part of the ultrasonic cleaning component to be inserted into the cleaning cavity. This implementation can greatly improve the effective vibration and reduce energy consumption while satisfying the cleaning effect. In addition, by setting the end of the vibrating part of the ultrasonic cleaning component away from the ultrasonic driving part to extend into the cleaning cavity through the opening and extend obliquely downward, during the cleaning process of the cleaning mechanism, the vibrating part can form a downward vibration component, which can play a similar role as flushing on the tip of the pipette needle, so that the contaminants are peeled off the tip of the pipette needle, thereby achieving a better cleaning effect on the pipette needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying creative labor.

[0010] Figure 1 It is a structural schematic diagram of a sample analyzer proposed in one embodiment of the utility model;

[0011] Figure 2 It is a structural schematic diagram of a cleaning mechanism proposed in one embodiment of the utility model;

[0012] Figure 3 It is a structural schematic diagram of an ultrasonic cleaning assembly proposed in one embodiment of the utility model;

[0013] Figure 4 It is a structural schematic diagram of a cleaning pool proposed in one embodiment of the utility model;

[0014] Figure 5 It is a structural schematic diagram of a cleaning mechanism proposed in another embodiment of the utility model;

[0015] Figure 6 It is a structural schematic diagram of a cleaning pool proposed in another embodiment of the utility model;

[0016] Figure 7 It is a structural schematic diagram of a cleaning pool proposed in another embodiment of the utility model;

[0017] Figure 8 It is a structural schematic diagram of a cleaning mechanism proposed in another embodiment of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the utility model.

[0019] like Figures 1 to 4 As shown, an embodiment of the utility model proposes a sample analyzer, which includes a dispensing mechanism 2 and a cleaning mechanism 4. The dispensing mechanism 2 includes a driving component 22 and a pipette needle 24 arranged on the driving component 22. The driving component 22 is used to drive the pipette needle 24 to move between different operating positions on the sample analyzer to absorb or discharge a target liquid, and the target liquid includes at least one of a sample and a reagent.

[0020] Among them, the number of the pipetting needles 24 can be set to one or more as needed. When there are multiple pipetting needles 24, the driving assembly 22 can drive these pipetting needles 24 to move independently. The driving assembly 22 can be but not limited to a three-dimensional driving assembly 22, which drives the pipetting needle 24 to perform three-dimensional movement in space. For the pipetting needle 24, a typical set of sequential actions is as follows: the pipetting needle 24 moves to, for example, a liquid suction position to absorb the target liquid, and then moves to, for example, a liquid addition position to discharge the absorbed liquid into the reaction cup, and then moves to a predetermined position to be cleaned. Of course, in some other embodiments, after the pipetting needle 24 absorbs the target liquid and before discharging the target liquid, the outer wall of the pipetting needle 24 can also be cleaned once. In some embodiments, the pipetting needle 24 can absorb and discharge samples in the first time period, and can also absorb and discharge reagents in the second time period. In some other embodiments, the pipetting needle 24 is only used to absorb and discharge samples, or only used to absorb and discharge reagents.

[0021] The cleaning mechanism 4 includes a cleaning tank 41 and an ultrasonic cleaning component 42. The cleaning tank 41 is provided with a cleaning chamber 41a and a needle insertion channel 41b connected to the cleaning chamber 41a. The cleaning chamber 41a is used to accommodate cleaning liquid. The pipette needle 24 to be cleaned is inserted into the cleaning chamber 41a through the needle insertion channel 41b. The cleaning tank 41 is provided with an opening 41c connected to the cleaning chamber 41a. The ultrasonic cleaning component 42 includes an ultrasonic driving part 421 and a vibrating part 422 connected to the ultrasonic driving part 421. One end of the vibrating part 422 away from the ultrasonic driving part 421 extends into the cleaning chamber 41a through the opening 41c and extends obliquely downward. The end of the vibrating part 422 is spaced from the side wall of the cleaning tank 41 to form a cleaning channel 41d connected to the needle insertion channel 41b.

[0022] In one embodiment, the cleaning pool 41 is provided with a top wall 411, and the top wall 411 is provided with a through hole 41e communicating with the cleaning chamber 41a, and the through hole 41e forms the needle insertion channel 41b. Of course, it is not limited to the above-mentioned embodiment. For example, in another embodiment, the top of the cleaning pool 41 is open, that is, the cleaning pool 41 is not provided with a top wall 411. In this embodiment, the opening at the top of the cleaning pool 41 forms the needle insertion channel 41b.

[0023] In a specific embodiment, the cleaning process of the pipette needle 24 is as follows: a certain amount of cleaning liquid is injected into the cleaning chamber 41a, the driving component 22 drives the pipette needle 24 to insert into the cleaning chamber 41a from the needle insertion channel 41b, and the ultrasonic cleaning component 42 works to clean the contaminants on the pipette needle 24 into the cleaning liquid. Among them, the cleaning principle of the ultrasonic cleaning component 42 is: the ultrasonic cleaning component 42 inputs ultrasonic waves of a certain frequency and power into the cleaning liquid, and the microbubbles in the cleaning liquid vibrate under the action of the sound field. When the sound pressure reaches a certain value, the bubbles rapidly increase and then collapse rapidly. When the cavitation bubbles collapse, tiny jets and shock waves are generated, and physical and chemical effects such as high temperature, high pressure, luminescence, and discharge are generated around them. Using the impact effect generated by the ultrasonic cavitation process, the contaminants can be peeled off the surface of the pipette needle 24, and the contaminants are destroyed and dispersed in the cleaning liquid.

[0024] The sample analyzer proposed in the embodiment of the utility model performs ultrasonic cleaning on the pipette needle 24 by inserting the vibrating portion 422 of the ultrasonic cleaning component 42 into the cleaning chamber 41a. This embodiment can greatly improve the effective vibration and reduce energy consumption while satisfying the cleaning effect. In addition, by setting the end of the vibrating portion 422 of the ultrasonic cleaning component 42 away from the ultrasonic driving portion 421 to extend into the cleaning chamber 41a through the opening 41c and extend obliquely downward, during the cleaning process of the cleaning mechanism 4, the vibrating portion 422 can form a downward vibration component, which can play a similar role as flushing on the tip of the pipette needle 24, so that the contaminants are peeled off the tip of the pipette needle 24, thereby achieving a better cleaning effect on the pipette needle 24.

[0025] like Figure 1 As shown, in some embodiments, the sample analyzer may further include a sample carrying mechanism 1 , a reagent carrying mechanism 3 , a reaction mechanism 5 , a mixing mechanism 7 and a measuring mechanism 9 .

[0026] The sample carrier mechanism 1 is provided with at least one sample position, and the sample position is used to place a sample container, and the sample container is used to contain a sample. In some embodiments, the sample carrier mechanism 1 can place the sample container through a sample distribution module and a front track.

[0027] The reagent carrying mechanism 3 is provided with at least one reagent position, and the reagent position is used to place a reagent container, and the reagent container is used to accommodate a reagent. In some embodiments, the reagent disk is provided in a disc-shaped structure, and the reagent carrying mechanism 3 can rotate and drive the reagent container it carries to rotate, and is used to rotate the reagent container to the reagent suction position for the reagent needle to absorb the reagent. In one embodiment, the reagent carrying mechanism 3 is one, which can be separately arranged outside the reaction mechanism 5.

[0028] The reaction mechanism 5 has a plurality of placement positions for placing reaction cups, and the reaction mechanism 5 is used to incubate the reaction liquid in the reaction cups at the placement positions, wherein the reaction liquid is prepared by samples and reagents. In some embodiments, the reaction mechanism 5 can be arranged in a disc-shaped structure, and the reaction mechanism 5 can rotate and drive the reaction cups in its placement positions to rotate, and is used to dispatch the reaction cups in the reaction mechanism 5 and incubate the reaction liquid in the reaction cups. In some embodiments, the reaction mechanism 5 may include an inner ring portion and an outer ring portion that rotate independently or together, and the inner ring portion includes one or more circles of tracks, and each circle of tracks is provided with a plurality of placement positions, which are used for incubating the reaction cups and dispatching the reaction cups between the various placement positions of the inner ring portion. The outer ring portion includes one or more circles of tracks, and each circle of tracks is provided with a plurality of placement positions, which are used to dispatch the reaction cups between the various placement positions of the outer ring portion.

[0029] The mixing mechanism 7 is used to mix the reaction solution that needs to be mixed in the reaction cup.

[0030] The measuring mechanism 9 is used to measure multiple reaction solutions. In some embodiments, the measuring mechanism 9 is used to measure the reaction solution in the reaction cup that has been incubated and is located at the measuring position to obtain the test result. In some embodiments, the measuring mechanism 9 can be a measuring unit for optical testing, which can detect the luminescence emphasis or absorbance of the reaction solution to be tested, and calculate the concentration of the component to be tested in the sample through the calibration curve.

[0031] like Figure 4 As shown, in some embodiments, a liquid inlet 41f is provided on the side wall of the cleaning chamber 41a, and a liquid outlet 41g is provided on the bottom wall of the cleaning chamber 41a. The cleaning mechanism 4 also includes a cleaning liquid supply assembly, which is connected to the liquid inlet 41f. The cleaning liquid supply assembly injects cleaning liquid into the cleaning chamber 41a through the liquid inlet 41f. When the pipette needle 24 completes cleaning, the cleaning liquid in the cleaning chamber 41a is discharged out of the cleaning chamber 41a through the liquid outlet 41g.

[0032] like Figure 4 As shown, in some embodiments, the cleaning pool 41 includes a pool wall, the pool wall forms a cleaning chamber 41a, the pool wall includes a side wall 412, and the opening 41c is provided on the side wall 412. It should be noted that the opening 41c is not limited to being provided on the side wall 412. For example, in some other embodiments, such as Figure 5As shown, the top of the cleaning tank 41 is set to be open, and the end of the vibrating part 422 away from the ultrasonic driving part 421 extends into the cleaning cavity 41a through the opening at the top of the cleaning tank 41 and extends obliquely downward, that is, the opening at the top of the cleaning tank 41 forms the opening 41c.

[0033] like Figures 2 to 4 As shown, in some embodiments, the vibration part 422 includes a flange part 4221 and a rod part 4222, the flange part 4221 is connected to the ultrasonic drive part 421, and the flange part 4221 is located outside the cleaning pool 41 and is sealed and connected to the periphery of the opening 41c. The rod part 4222 is connected to the flange part 4221, and one end of the rod part 4222 away from the flange part 4221 extends into the cleaning chamber 41a through the opening 41c and extends obliquely downward, and the end of the rod part 4222 is spaced from the side wall 412 of the cleaning pool 41 to form a cleaning channel 41d connected to the needle insertion channel 41b. In this embodiment, by setting the flange part 4221 of the vibration part 422 outside the cleaning pool 41 and sealing and connecting to the periphery of the opening 41c, the problem of the cleaning liquid in the cleaning chamber 41a leaking to the ultrasonic drive part 421 can be avoided, that is, there is no need to consider the waterproof problem of the ultrasonic vibration part 422, thereby simplifying the waterproof requirements of the ultrasonic cleaning component 42. Furthermore, since the cleaning pool 41 does not need to accommodate the ultrasonic drive unit, the volume of the cleaning pool 41 can be made relatively small, so that the space outside the cleaning pool 41 can be fully utilized to accommodate the ultrasonic drive unit 421, thereby improving the space utilization rate of the sample analyzer.

[0034] In some embodiments, the cleaning mechanism 4 further includes a sealing ring (not shown) and a locking member (not shown), the locking member is used to lock the flange portion 4221 to the outer side wall 412 of the cleaning pool 41, and the sealing ring is sandwiched between the flange portion 4221 and the outside of the cleaning pool 41 to achieve a sealed connection of the opening 41c. Of course, the flange portion 4221 and the cleaning pool 41 are not limited to being locked by a locking member. For example, in some other embodiments, the flange portion 4221 and the cleaning pool 41 can be connected by other means such as threaded connection or snap connection.

[0035] like Figure 4 As shown, in some embodiments, the cleaning pool 41 further includes an overflow chamber 41h, which is used to receive the cleaning liquid overflowing from the cleaning chamber 41a, and the overflow chamber 41h is provided with a drain port 41i. The cleaning liquid overflowing from the cleaning chamber 41a enters the overflow chamber 41h and is discharged from the cleaning pool 41 from the drain port 41i of the overflow chamber 41h. In this embodiment, the liquid level of the cleaning liquid in the cleaning chamber 41a can be controlled by the overflow chamber 41h, so that the amount of the cleaning liquid in the cleaning chamber 41a can be kept consistent each time the pipetting needle 24 is cleaned, thereby achieving a stable and consistent cleaning effect for the pipetting needle 24.

[0036] Of course, the liquid level of the cleaning liquid is not limited to being controlled by the overflow chamber 41h. For example, in some other embodiments, a liquid level detection device can be provided to detect the liquid level of the cleaning liquid in the cleaning chamber 41a. The liquid level detection device transmits the detected signal to the controller. When the liquid level of the cleaning liquid injected into the cleaning chamber 41a reaches a preset value, the controller controls the cleaning liquid supply component to stop supplying the cleaning liquid. In one embodiment, the pipette needle 24 can be used as a liquid level detection device. When used, the pipette needle 24 is first inserted into the cleaning chamber 41a, and then the cleaning liquid supply component injects the cleaning liquid into the cleaning chamber 41a. The liquid level of the cleaning liquid can be obtained by obtaining the capacitance change value of the pipette needle 24. In another embodiment, the cleaning liquid can be quantitatively supplied by a syringe pump so that the liquid level of the cleaning liquid injected into the cleaning chamber 41a each time remains basically consistent.

[0037] like Figure 6 and Figure 7 As shown, in some embodiments, the cleaning pool 41 includes a pool wall, which forms a cleaning chamber 41a. The pool wall includes at least two side walls 412, and at least one side wall 412 is provided with an overflow port 41j so that the cleaning liquid in the cleaning chamber 41a can overflow to the overflow chamber 41h through the overflow port 41j.

[0038] like Figure 6 As shown, in some embodiments, the overflow port 41j is formed by a top portion of the side wall 412 being recessed downward. Figure 7 As shown, in some embodiments, the overflow port 41 j is formed by a through hole penetrating the side wall 412 .

[0039] It should be noted that the present invention is not limited to the above-mentioned implementation mode. For example, in some other embodiments, Figure 4 As shown, the height of at least one side wall 412 is lower than the height of the other side walls 412 of the cleaning chamber 41 a , so that the cleaning liquid in the cleaning chamber 41 a can overflow to the overflow chamber 41 h through the top of the side wall 412 .

[0040] like Figure 4 As shown, in some embodiments, the opening 41c is provided on the side wall 412 of the cleaning pool 41, and the upper edge of the overflow port 41j or the upper edge of the side wall 412 with a lower height is lower than the lower edge of the opening 41c. It can be understood that the liquid level of the cleaning liquid in the cleaning chamber 41a is determined by the upper edge of the overflow port 41j or the upper edge of the side wall 412 with a lower height. In this embodiment, by setting the upper edge of the overflow port 41j or the upper edge of the side wall 412 with a lower height to be lower than the lower edge of the opening 41c, the cleaning liquid in the cleaning chamber 41a will not flood the opening 41c, thereby reducing the risk of the cleaning liquid leaking to the ultrasonic drive unit 421.

[0041] like Figure 4As shown, in some embodiments, the cleaning pool 41 includes a pool wall, the pool wall forms a cleaning chamber 41a, and the pool wall includes a bottom wall 413, a first side wall 4121, and a second side wall 4122 arranged opposite to the first side wall 4121. The first side wall 4121 includes a first extension portion 4123 and a second extension portion 4124, the first extension portion 4123 is connected to the bottom wall 413, the second extension portion 4124 extends obliquely upward from the first extension portion 4123 toward the second side wall 4122 and away from the bottom wall 413, and the opening 41c is provided in the second extension portion 4124. In this embodiment, by providing the second extension portion 4124 extending obliquely upward, when the flange portion 4221 of the vibration portion 422 is installed on the second extension portion 4124, the end of the vibration portion 422 away from the ultrasonic driving portion 421 just extends obliquely downward through the opening 41c into the cleaning chamber 41a.

[0042] It should be noted that the first side wall 4121 is not limited to the above-mentioned setting of the first extension portion 4123 and the second extension portion 4124 extending obliquely upward. For example, in another embodiment, the first side wall 4121 can also be set as an overall vertical side wall 412, and the ultrasonic cleaning component 42 is connected or not connected to the outer wall 412 of the cleaning tank 41 through a connecting component, so that the end of the vibration portion 422 away from the ultrasonic driving portion 421 can extend obliquely downward into the cleaning chamber 41a through the opening 41c.

[0043] like Figure 8 As shown, in some other embodiments, the cleaning pool 41 includes a pool wall, the pool wall forms a cleaning chamber 41a, and the pool wall includes a bottom wall 413, a first side wall 4121, and a second side wall 4122 arranged opposite to the first side wall 4121. The first side wall 4121 includes a first extension portion 4123, a second extension portion 4124, and a third extension portion 4125 connected in sequence, the first extension portion 4123 is connected to the bottom wall 413, the third extension portion 4125 is close to the second side wall 4122 relative to the first extension portion 4123, the second extension portion 4124 extends obliquely upward from the first extension portion 4123 toward the second side wall 4122 and away from the bottom wall 413 to the third extension portion 4125, and the opening 41c is provided at the second extension portion 4124.

[0044] like Figure 8As shown, in some embodiments, the cleaning pool 41 further includes an overflow chamber 41h, which is used to receive the cleaning liquid overflowing from the cleaning chamber 41a, and the overflow chamber 41h is provided with a drain port 41i. The cleaning pool 41 includes a pool wall, which forms the cleaning chamber 41a, and the pool wall includes at least two side walls 412, and the height of at least one side wall 412 is lower than the height of the other side walls 412 of the cleaning chamber 41a, so that the cleaning liquid in the cleaning chamber 41a can overflow to the overflow chamber 41h through the top of the side wall 412. The upper edge of the side wall 412 with a lower height is higher than the upper edge of the second extension portion 4124.

[0045] like Figure 4 As shown, in some embodiments, the cleaning pool 41 includes a pool wall, the pool wall forms a cleaning chamber 41a, the pool wall includes a first bottom wall 4131 and a second bottom wall 4132, the first bottom wall 4131 is located below the vibration part 422, and the second bottom wall 4132 is located below the cleaning channel 41d, wherein the first bottom wall 4131 is higher than the second bottom wall 4132. In this embodiment, the space required by the pipetting needle 24 in the cleaning chamber 41a and the space required by the vibration part 422 in the cleaning chamber 41a are comprehensively considered, and the structure of the cleaning chamber 41a is reasonably set, which can effectively utilize the space of the cleaning chamber 41a under the condition of meeting the compact structure, and at the same time can reduce the amount of cleaning liquid. In some other embodiments, it is also possible to set the first bottom wall 4131 and the second bottom wall 4132 to be equal in height, which can be determined according to actual design needs.

[0046] like Figure 4 As shown, in some embodiments, the cleaning pool 41 includes a bottom wall 413 and a side wall 412 connected to the bottom wall 413, and the bottom wall 413 and the side wall 412 enclose a cleaning chamber 41a. The cleaning pool 41 also includes a top wall 411, which is arranged above the side wall 412 to block the splashing liquid generated by the pipetting needle 24 during the cleaning process, and the top wall 411 is provided with a through hole 41e to form a needle entry channel 41b. In this embodiment, by providing a shielding plate of the top wall 411, it is possible to prevent the cleaning liquid from splashing around the cleaning station during the cleaning process of the pipetting needle 24.

[0047] It should be noted that the needle insertion channel 41b is not limited to the above-mentioned method of setting the through hole 41e on the top wall 411. For example, in some other embodiments, the cleaning pool 41 is not provided with a top wall 411, and the opening formed by the end of the side wall 412 away from the bottom wall 413 forms the needle insertion channel 41b.

[0048] In some embodiments, the cleaning pool 41 further includes a reflective structure (not shown) disposed in the cleaning chamber 41a, the vibrating portion 422 and the reflective structure are located on opposite sides of the cleaning channel 41d, and the reflective structure is used to reflect the vibration energy diffused from the vibrating portion 422 back to the cleaning channel 41d. In this embodiment, by providing a reflective structure to further reflect the vibration energy diffused from the vibrating portion 422, the vibration reflected from the reflective structure can clean the side of the pipette needle 24 away from the vibrating portion 422, thereby obtaining a better cleaning effect.

[0049] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sample analyzer, characterized in that: include: a dispensing mechanism, the dispensing mechanism comprising a driving assembly and a pipette needle disposed on the driving assembly, the driving assembly being used to drive the pipette needle to move between different operating positions on the sample analyzer to absorb or discharge a target liquid, the target liquid comprising at least one of a sample and a reagent; A cleaning mechanism, the cleaning mechanism comprises a cleaning tank and an ultrasonic cleaning component, the cleaning tank is provided with a cleaning cavity and a needle insertion channel connected to the cleaning cavity, the cleaning cavity is used to accommodate cleaning liquid, a pipette needle to be cleaned is inserted into the cleaning cavity through the needle insertion channel, the cleaning tank is provided with an opening connected to the cleaning cavity; the ultrasonic cleaning component comprises an ultrasonic driving part and a vibrating part connected to the ultrasonic driving part, one end of the vibrating part away from the ultrasonic driving part extends into the cleaning cavity through the opening and extends obliquely downward, and the end of the vibrating part is spaced from the side wall of the cleaning tank to form a cleaning channel connected to the needle insertion channel.

2. The sample analyzer according to claim 1, characterized in that: The cleaning pool comprises a pool wall, the pool wall forms the cleaning cavity, the pool wall comprises a side wall, and the opening is arranged on the side wall.

3. The sample analyzer according to claim 1, wherein: The vibration unit comprises: A flange portion, the flange portion is connected to the ultrasonic driving portion, the flange portion is located outside the cleaning tank and is sealed and connected to the periphery of the opening; A rod portion, wherein the rod portion is connected to the flange portion, and one end of the rod portion away from the flange portion extends into the cleaning cavity through the opening and extends obliquely downward, and the end of the rod portion is spaced from the side wall of the cleaning pool to form a cleaning channel connected to the needle insertion channel.

4. The sample analyzer according to any one of claims 1 to 3, characterized in that: The cleaning pool also includes: The overflow chamber is used to receive the cleaning liquid overflowing from the cleaning chamber, and the overflow chamber is provided with a liquid discharge port.

5. The sample analyzer according to claim 4, characterized in that: The cleaning pool includes a pool wall, which forms the cleaning chamber. The pool wall includes at least two side walls, and at least one of the side walls is provided with an overflow port so that the cleaning liquid in the cleaning chamber can overflow to the overflow chamber through the overflow port; or, the height of at least one of the side walls is lower than the height of the other side walls of the cleaning chamber, so that the cleaning liquid in the cleaning chamber can overflow to the overflow chamber through the top of the side wall.

6. The sample analyzer according to claim 5, characterized in that: The opening is arranged on the side wall of the cleaning tank, and the upper edge of the overflow port or the upper edge of the side wall with a lower height is lower than the lower edge of the opening.

7. The sample analyzer according to claim 1, characterized in that: The cleaning pool comprises a pool wall, the pool wall forms the cleaning cavity, and the pool wall comprises a bottom wall, a first side wall and a second side wall arranged opposite to the first side wall; The first side wall includes a first extension portion and a second extension portion, the first extension portion is connected to the bottom wall, the second extension portion extends obliquely upward from the first extension portion toward the second side wall and away from the bottom wall, and the opening is provided in the second extension portion.

8. The sample analyzer according to claim 1, wherein: The cleaning pool comprises a pool wall, the pool wall forms the cleaning cavity, and the pool wall comprises a bottom wall, a first side wall and a second side wall arranged opposite to the first side wall; The first side wall includes a first extension portion, a second extension portion and a third extension portion connected in sequence, the first extension portion is connected to the bottom wall, the third extension portion is close to the second side wall relative to the first extension portion, the second extension portion extends obliquely upward from the first extension portion toward the second side wall and away from the bottom wall to the third extension portion, and the opening is provided in the second extension portion.

9. The sample analyzer according to claim 8, characterized in that: The cleaning pool also includes an overflow cavity, which is used to receive the cleaning liquid overflowing from the cleaning cavity, and the overflow cavity is provided with a liquid discharge port; The cleaning pool includes a pool wall, the pool wall forms the cleaning chamber, the pool wall includes at least two side walls, at least one of the side walls has a height lower than the height of the other side walls of the cleaning chamber, so that the cleaning liquid in the cleaning chamber can overflow to the overflow chamber through the top of the side wall; Wherein, the upper edge of the side wall with a shorter height is higher than the upper edge of the second extending portion.

10. The sample analyzer according to claim 1, wherein: The cleaning pool includes a pool wall, which forms the cleaning chamber. The pool wall includes a first bottom wall and a second bottom wall, wherein the first bottom wall is located below the vibration part and the second bottom wall is located below the cleaning channel, wherein the first bottom wall is higher than the second bottom wall.

11. The sample analyzer according to claim 1, wherein: The cleaning pool comprises a bottom wall and a side wall connected to the bottom wall, wherein the bottom wall and the side wall enclose the cleaning chamber; The cleaning pool also includes a top wall, which is arranged above the side walls to block the splashing liquid generated by the pipetting needle during the cleaning process, and the top wall is provided with a through hole to form the needle insertion channel.

12. The sample analyzer according to claim 1, wherein: The cleaning pool also includes a reflection structure arranged in the cleaning cavity. The vibration part and the reflection structure are located on two opposite sides of the cleaning channel. The reflection structure is used to reflect the vibration energy diffused by the vibration part back to the cleaning channel.

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