CN220231772U - Reagent conveying device and sample analyzer - Google Patents

Abstract

The application discloses a reagent conveying device and a sample analyzer, wherein the reagent conveying device comprises a driving motor, a first injector, at least one second injector, a first sub-pipeline, a second sub-pipeline, a third sub-pipeline and a target reagent container, wherein the driving motor is respectively connected with a push rod of the first injector and a push rod of the second injector, and is used for driving all push rods to synchronously move; one end of the first sub-pipeline is connected with the conveying opening of the first injector, the other end of the first sub-pipeline is respectively connected with the first end of the second sub-pipeline and the first end of the third sub-pipeline, the second end of the second sub-pipeline and the second end of the third sub-pipeline are respectively connected with the target reagent container, the second sub-pipeline is used for enabling liquid flowing out of the target reagent container to circulate, and the third sub-pipeline is used for enabling liquid flowing to the target reagent container to circulate. Based on the mode, the detection accuracy of the sample analyzer based on the reagent conveying device can be improved.

Description

Reagent conveying device and sample analyzer

Technical Field

The present application relates to the field of detection technology, and in particular, to a reagent delivery device and a sample analyzer.

Background

In the prior art, in a reagent conveying device of a sample analyzer, a driving end of a driving motor is generally fixedly connected with push rods of a plurality of syringes respectively, so that the plurality of syringes are simultaneously driven by the driving motor to suck and discharge, so that each syringe is controlled to suck or discharge corresponding liquid from or to a connected module.

The disadvantage of the prior art is that when one of the syringes is driven by the driving motor to perform suction and discharge, the other syringe connected to the driving motor also performs suction and discharge passively, so that the liquid in the pipeline connected to the other syringe is pumped back and forth, and excessive bubbles are generated in the liquid, which results in lower accuracy of the sample analyzer in sample detection based on the liquid conveyed by the reagent conveying device.

Disclosure of Invention

The technical problem that this application mainly solves is how effectively to reduce the bubble quantity in the liquid of carrying among the reagent conveyor to improve the detection accuracy based on the sample analysis appearance that reagent conveyor is located.

In order to solve the technical problem, a first technical scheme adopted in the application is as follows: the reagent conveying device comprises a driving motor, a first injector, at least one second injector, a first sub-pipeline, a second sub-pipeline, a third sub-pipeline and a target reagent container, wherein the driving motor is respectively connected with a push rod of the first injector and a push rod of the second injector, and is used for driving all push rods to synchronously move; one end of the first sub-pipeline is connected with the conveying opening of the first injector, the other end of the first sub-pipeline is respectively connected with the first end of the second sub-pipeline and the first end of the third sub-pipeline, the second end of the second sub-pipeline and the second end of the third sub-pipeline are respectively connected with the target reagent container, the second sub-pipeline is used for enabling liquid flowing out of the target reagent container to circulate, and the third sub-pipeline is used for enabling liquid flowing to the target reagent container to circulate.

The second sub-pipeline is provided with a first one-way valve, the third sub-pipeline is provided with a second one-way valve, the first one-way valve is used for enabling reagent flowing from the second end of the second sub-pipeline to the first end of the second sub-pipeline to flow, and the second one-way valve is used for enabling reagent flowing from the first end of the third sub-pipeline to flow to the second end of the second sub-pipeline to flow.

Wherein the reagent delivery device further comprises a first three-way joint; the first port of the first three-way joint is connected with the other end of the first sub-pipeline, the second port of the first three-way joint is connected with the first end of the second sub-pipeline, and the third port of the first three-way joint is connected with the first end of the third sub-pipeline.

Wherein the reagent delivery device further comprises a first three-way valve; the public mouth of first three-way valve is connected with the delivery opening of first syringe, and the first mouth of first three-way valve is connected with the one end of first sub-pipeline, and the second mouth of first three-way valve is connected with the output pipeline of corresponding target reagent.

The second port of the first three-way valve is connected with the corresponding reaction tank through an output pipeline.

Wherein the at least one second syringe comprises a sampling syringe, and the reagent delivery device further comprises a second three-way valve; the common port of the second three-way valve is connected with the delivery opening of the sampling syringe, the first port of the second three-way valve is connected with the corresponding cleaning reagent container, and the second port of the second three-way valve is connected with the corresponding sample reagent container.

Wherein the at least one second syringe comprises a reaction syringe, and the reagent delivery device further comprises a second three-way connector and a two-way valve; the first port of the second three-way joint is connected with the conveying opening of the reaction injector, the second port of the second three-way joint is connected with the corresponding diluted reagent container, the third port of the second three-way joint is connected with the first port of the two-way valve, and the second port of the two-way valve is connected with the corresponding reaction tank.

Wherein the reagent delivery device further comprises a third three-way valve; the common port of the third three-way valve is connected with the conveying opening of the reaction injector, the first port of the third three-way valve is connected with the first port of the second three-way joint, the second port of the third three-way valve is connected with the corresponding conveying opening of the auxiliary pushing injector, and the motor connected with the auxiliary pushing injector is different from the driving motor.

In order to solve the technical problem, a second technical scheme adopted by the application is as follows: a sample analyzer comprises a sample injection device, a reaction device and the reagent conveying device; the sample injection device is connected with the reagent conveying device, and the reagent conveying device is connected with the reaction device.

Wherein the sample analyzer is a blood cell analyzer.

The beneficial effects of this application lie in: compared with the prior art, in the technical scheme of the application, through being provided with two parallel unidirectional circulation sub-pipelines between the first sub-pipeline connected with the first injector and the target reagent container, namely the second sub-pipeline and the third sub-pipeline, the second sub-pipeline only supplies the liquid circulation flowing from the target reagent container to the first sub-pipeline, and the third sub-pipeline only supplies the liquid circulation flowing from the first sub-pipeline to the target reagent container, so that the liquid absorbed by the first injector flows from one sub-pipeline and the liquid spitting from the other sub-pipeline during passive pumping, the quantity of generated bubbles is reduced, and the detection accuracy of the sample analyzer based on the reagent conveying device is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a reagent delivery device of the present application;

FIG. 2 is a schematic view of another embodiment of a reagent delivery device of the present application;

FIG. 3 is a schematic structural view of an embodiment of the sample analyzer of the present application.

The reference numerals are: the driving motor 101, the first syringe 102, the second syringe 103, the sampling syringe 1031, the reaction syringe 1032, the first sub-line 104, the second sub-line 105, the first check valve 1051, the third sub-line 106, the second check valve 1061, the target reagent container 107, the first three-way joint 108, the first three-way valve 109, the second three-way valve 110, the second three-way joint 111, the two-way valve 112, the third three-way valve 113, the sample analyzer 20, the reagent delivering device 21, the sample feeding device 22, and the reaction device 23.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The terms "first," "second," "third," and the like in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring first to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a reagent delivery device according to the present application, and as shown in fig. 1, the reagent delivery device includes a driving motor 101, a first injector 102, at least one second injector 103, a first sub-pipeline 104, a second sub-pipeline 105, a third sub-pipeline 106, and a target reagent container 107.

The driving motor 101 is respectively connected with the push rod of the first syringe 102 and the push rod of the second syringe 103, and the driving motor 101 is used for driving all the push rods to synchronously move.

Specifically, the driving motor 101 may be provided with a driving end and a main body, the driving motor 101 may control the driving end to move away from or close to the main body, and by fixedly connecting all the push rods of the injectors, for example, the push rod of the first injector 102 and the push rod of the second injector 103, with the driving end of the driving motor 101, when the driving end of the driving motor 101 is driven to move, the push rods of the injectors can synchronously move correspondingly, so as to realize the functions of washing liquid and spitting liquid of each injector.

One end of the first sub-pipeline 104 is connected to the delivery opening of the first injector 102, the other end of the first sub-pipeline 104 is connected to the first end of the second sub-pipeline 105 and the first end of the third sub-pipeline 106, respectively, the second end of the second sub-pipeline 105 and the second end of the third sub-pipeline 106 are connected to the target reagent container 107, respectively, the second sub-pipeline 105 is used for flowing out of the target reagent container 107, and the third sub-pipeline 106 is used for flowing into the target reagent container 107.

Specifically, the first injector 102 is respectively communicated with the second sub-pipeline 105 and the third sub-pipeline 106 through the first sub-pipeline 104, while the first sub-pipeline 104 is respectively communicated with the target reagent container 107 through the second sub-pipeline 105 and the third sub-pipeline 106, and the second sub-pipeline 105 and the third sub-pipeline 106 are two unidirectional flow pipelines with opposite flow directions, that is, the second sub-pipeline 105 can only be used for passing the liquid flowing out of the target reagent container 107 and flowing to the first sub-pipeline 104, and the third sub-pipeline 106 can only be used for passing the liquid flowing out of the first sub-pipeline 104 and flowing to the target reagent container 107.

For example, when the driving motor 101 drives a second syringe 103 to suck liquid, the other second syringes 103 and the first syringes 102 can also suck liquid passively, at this time, the liquid in the target reagent container 107 can be sucked out through the second sub-pipeline 105, and when the driving motor 101 drives a second syringe 103 to discharge liquid, the other second syringes 103 and the first syringes 102 can also suck liquid passively, at this time, the liquid in the first sub-pipeline 104 can flow into the target reagent container 107 through the third sub-pipeline 106.

Based on the configuration of the second sub-pipeline 105 and the third sub-pipeline 106, in the conveying pipeline corresponding to the first syringe 102, the suction liquid flow and the discharge liquid flow caused by the passive suction of the first syringe 102 are respectively conveyed along different sub-pipelines, so that the occurrence of the situation that a large number of bubbles are generated due to liquid pumping and unstable hydraulic pressure is avoided.

The volume of the first syringe 102 may specifically be 2.5 milliliters.

Compared with the prior art, in the technical scheme of the application, through being provided with two parallel unidirectional circulation sub-pipelines between the first sub-pipeline connected with the first injector and the target reagent container, namely the second sub-pipeline and the third sub-pipeline, the second sub-pipeline only supplies the liquid circulation flowing from the target reagent container to the first sub-pipeline, and the third sub-pipeline only supplies the liquid circulation flowing from the first sub-pipeline to the target reagent container, so that the liquid absorbed by the first injector flows from one sub-pipeline and the liquid spitting from the other sub-pipeline during passive pumping, the quantity of generated bubbles is reduced, and the detection accuracy of the sample analyzer based on the reagent conveying device is improved.

In an embodiment, referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of the reagent delivery device of the present application, as shown in fig. 2, a first check valve 1051 is disposed on the second sub-pipeline 105, a second check valve 1061 is disposed on the third sub-pipeline 106, the first check valve 1051 is used for circulating a reagent flowing from the second end of the second sub-pipeline 105 to the first end of the second sub-pipeline 105, and the second check valve 1061 is used for circulating a reagent flowing from the first end of the third sub-pipeline 106 to the second end of the second sub-pipeline 105.

Specifically, as shown in fig. 1, the second sub-line 105 and the third sub-line 106 are provided with corresponding check valves, respectively, wherein it is assumed that a direction in which the liquid flows from the second end of the second sub-line 105 toward the first end of the second sub-line 105 is referred to as a first flow direction, and a direction in which the liquid flows from the first end of the third sub-line 106 toward the second end of the third sub-line 106 is referred to as a second flow direction.

The first one-way valve 1051 may allow liquid flowing in a first direction in the second sub-line 105 to pass and block liquid flowing in a direction opposite to the first direction, while the second one-way valve 1061 may allow liquid flowing in a second direction in the third sub-line 106 to pass and block liquid flowing in a direction opposite to the second direction.

Based on the above-mentioned arrangement of the check valve, the second sub-pipeline 105 and the third sub-pipeline 106 can have the capability of limiting the flow direction respectively, so that the second sub-pipeline 105 can only pass through the liquid flowing out of the target reagent container 107 and flowing toward the first sub-pipeline 104, and the third sub-pipeline 106 can only pass through the liquid flowing out of the first sub-pipeline 104 and flowing toward the target reagent container 107, thereby avoiding occurrence of a situation that a large number of bubbles are generated due to pumping of the liquid and unstable hydraulic pressure.

In one embodiment, the reagent delivery device further comprises a first three-way joint 108.

A first port of the first three-way joint 108 is connected to the other end of the first sub-pipe 104, a second port of the first three-way joint 108 is connected to the first end of the second sub-pipe 105, and a third port of the first three-way joint 108 is connected to the first end of the third sub-pipe 106.

Specifically, as shown in fig. 1, three openings of the first three-way joint 108 are respectively communicated with the first sub-pipe 104, the second sub-pipe 105 and the third sub-pipe 106, so that the three sub-pipes can be communicated through the three-way joint.

For example, when the driving motor 101 drives a second syringe 103 to aspirate liquid, the other second syringes 103 and the first syringes 102 are also passively aspirated, and at this time, the liquid in the target reagent container 107 may be aspirated through the second sub-line 105 and the first sub-line 104, and similarly, when the driving motor 101 drives a second syringe 103 to aspirate liquid, the other second syringes 103 and the first syringes 102 are also passively aspirated, and at this time, the liquid in the first sub-line 104 may flow into the target reagent container 107 through the first sub-line 104 and the third sub-line 106.

Based on the above manner, the liquid suction flow and the liquid discharge flow caused by the passive suction of the first injector 102 can be respectively conveyed along different sub-pipelines, so that the occurrence of the condition that a large number of bubbles are generated due to liquid pumping and unstable hydraulic pressure is avoided, and the detection accuracy of the sample analyzer based on the reagent conveying device is improved.

In an embodiment, the reagent delivery device further comprises a first three-way valve 109.

The common port of the first three-way valve 109 is connected to the delivery opening of the first syringe 102, the first port of the first three-way valve is connected to one end of the first sub-line 104, and the second port of the first three-way valve is connected to the output line of the corresponding target reagent.

Specifically, the common port of the first three-way valve 109 may be switched to communicate with the first port or the second port, respectively.

For example, when the target reagent needs to be output, the common port of the first three-way valve 109 may be first communicated with the first port, so that the first injector 102 sucks a certain amount of target reagent from the target reagent container 107, and then the common port of the first three-way valve 109 is communicated with the second port, so that the first injector 102 outputs the sucked target reagent from the output pipeline a of the corresponding target reagent, which may be added to a reaction tank or other devices needing the target reagent through the output pipeline a of the target reagent, which is not limited herein.

The target reagent container 107 may be a hemolysis reagent container, and the target reagent may be a hemolysis reagent.

In this way, the reagent transfer device can be provided with the capability of sucking and outputting the target reagent by the provision of the first three-way valve 109.

Optionally, the second port of the first three-way valve 109 is connected to the corresponding reaction cell through an output line.

Specifically, the first syringe 102 adds the sucked target reagent to a reaction cell, which may be any type of reaction cell such as a counter cell, requiring the target reagent through the output line a of the target reagent.

In this way, the reagent transfer device can be provided with the capability of sucking and outputting the target reagent by the provision of the first three-way valve 109.

In one embodiment, the at least one second syringe 103 comprises a sampling syringe 1031 and the reagent delivery device further comprises a second three-way valve 110.

The common port of the second three-way valve 110 is connected to the delivery opening of the sampling syringe 1031, the first port of the second three-way valve 110 is connected to the corresponding wash reagent container, and the second port of the second three-way valve 110 is connected to the corresponding sample reagent container.

Specifically, as shown in fig. 1, a first port of the second three-way valve 110 is connected to a corresponding wash reagent container B, and a second port of the second three-way valve 110 is connected to a corresponding sample reagent container C.

The wash reagent container B may be a container containing any type of wash reagent, and the sample reagent container C may be a container containing any type of sample reagent, wherein the wash reagent may be a hemolysis reagent or other reagent, and the sample reagent may be a blood sample reagent or other reagent, without limitation.

The volume of sampling syringe 1031 may specifically be 100 microliters.

Based on the above-described mode, the sampling syringe 1031 can be provided with the function of sucking and discharging two types of reagents respectively by two types of reagent containers, thereby realizing the transport of the sample and the cleaning of itself, and improving the reliability of the reagent transport device.

In one embodiment, the at least one second syringe 103 comprises a reaction syringe 1032, and the reagent delivery device further comprises a second three-way connector 111 and a two-way valve 112.

The first port of the second three-way joint 111 is connected to the delivery opening of the reaction syringe 1032, the second port of the second three-way joint 111 is connected to the corresponding diluted reagent container, the third port of the second three-way joint 111 is connected to the first port of the two-way valve 112, and the second port of the two-way valve 112 is connected to the corresponding reaction cell.

Specifically, as shown in fig. 1, the second port of the second three-way joint 111 is connected to the corresponding diluted reagent container D, the third port of the second three-way joint 111 is connected to the first port of the two-way valve 112, and the second port of the two-way valve 112 is connected to the corresponding reaction cell E.

The reaction syringe 1032 may draw the diluent through the diluent container D when the two-way valve 112 is closed, and then deliver the corresponding diluent to the reaction cell E when the two-way valve 112 is opened, so as to satisfy the requirements of the reaction cell E.

Based on the above mode, a diluent conveying pipeline can be constructed, so that the reagent conveying device has a diluent conveying function.

Optionally, the reagent delivery device further comprises a third three-way valve 113.

The common port of the third three-way valve 113 is connected with the delivery opening of the reaction syringe 1032, the first port of the third three-way valve 113 is connected with the first port of the second three-way joint 111, the second port of the third three-way valve 113 is connected with the delivery opening of the corresponding auxiliary push syringe, and the motor to which the auxiliary push syringe is connected is different from the driving motor 101.

Specifically, the volume of the pilot syringe F may be 100 microliters.

The auxiliary pushing injector F may be connected to the second port of the third three-way valve 113, so that when the common port of the third three-way valve 113 is communicated with the second port, pressure can be applied to the pipeline between the third three-way valve 113 and the reaction injector 1032 by the auxiliary pushing injector, thereby realizing auxiliary pushing action and improving the reliability and the conveying efficiency of the reagent conveying device.

Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of the sample analyzer, as shown in fig. 3, the sample analyzer 20 includes a reagent conveying device 21, a sample feeding device 22 and a reaction device 23, where the reagent conveying device 21 may be specifically a reagent conveying device described in any of the foregoing embodiments, and details are not repeated herein.

The sample injection device 22 is connected to the reagent delivery device 21, and the reagent delivery device 21 is connected to the reaction device 23, specifically, a sample reagent or other reagents for detection may be placed on the sample injection device 22, the reagent delivery device 21 may obtain the reagent from the sample injection device 22 and store the reagent in the corresponding syringe, and the reagent delivery device 21 may also deliver the reagent in each syringe to the corresponding reaction device 23 for performing the corresponding sample detection operation or other operations, which is not limited herein.

In one embodiment, the sample analyzer is a blood cell analyzer. Specifically, impedance counting of blood cells may be performed based on a hemolyzing agent provided by a blood cell analyzer, and other analysis processes may be performed on blood cells, which are not limited herein.

Compared with the prior art, in the technical scheme of the application, through being provided with two parallel unidirectional circulation sub-pipelines between the first sub-pipeline connected with the first injector and the target reagent container, namely the second sub-pipeline and the third sub-pipeline, the second sub-pipeline only supplies the liquid circulation flowing from the target reagent container to the first sub-pipeline, and the third sub-pipeline only supplies the liquid circulation flowing from the first sub-pipeline to the target reagent container, so that the liquid absorbed by the first injector flows from one sub-pipeline and the liquid spitting from the other sub-pipeline during passive pumping, the quantity of generated bubbles is reduced, and the detection accuracy of the sample analyzer based on the reagent conveying device is improved.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (10)

1. The reagent conveying device is characterized by comprising a driving motor, a first injector, at least one second injector, a first sub-pipeline, a second sub-pipeline, a third sub-pipeline and a target reagent container, wherein the driving motor is respectively connected with a push rod of the first injector and a push rod of the second injector, and the driving motor is used for driving all the push rods to synchronously move;

one end of the first sub-pipeline is connected with the conveying opening of the first injector, the other end of the first sub-pipeline is respectively connected with the first end of the second sub-pipeline and the first end of the third sub-pipeline, the second end of the second sub-pipeline and the second end of the third sub-pipeline are respectively connected with the target reagent container, the second sub-pipeline is used for enabling liquid flowing out of the target reagent container to circulate, and the third sub-pipeline is used for enabling liquid flowing to the target reagent container to circulate.

2. The reagent feeding apparatus according to claim 1, wherein a first check valve is provided in the second sub-line, and a second check valve is provided in the third sub-line, the first check valve being for circulating a reagent flowing from the second end of the second sub-line to the first end of the second sub-line, and the second check valve being for circulating a reagent flowing from the first end of the third sub-line to the second end of the second sub-line.

3. The reagent delivery device of claim 1 or 2, further comprising a first three-way joint;

the first port of the first three-way joint is connected with the other end of the first sub-pipeline, the second port of the first three-way joint is connected with the first end of the second sub-pipeline, and the third port of the first three-way joint is connected with the first end of the third sub-pipeline.

4. The reagent delivery device of claim 1 or 2, further comprising a first three-way valve;

the common port of the first three-way valve is connected with the delivery opening of the first injector, the first port of the first three-way valve is connected with one end of the first sub-pipeline, and the second port of the first three-way valve is connected with the corresponding output pipeline of the target reagent.

5. The reagent delivery device according to claim 4, wherein the second port of the first three-way valve is connected to the corresponding reaction cell via the output line.

6. The reagent delivery device of claim 1 or 2, wherein at least one of the second syringes comprises a sampling syringe, the reagent delivery device further comprising a second three-way valve;

the common port of the second three-way valve is connected with the delivery opening of the sampling syringe, the first port of the second three-way valve is connected with the corresponding cleaning reagent container, and the second port of the second three-way valve is connected with the corresponding sample reagent container.

7. The reagent delivery device of claim 1 or 2, wherein at least one of the second syringes comprises a reaction syringe, the reagent delivery device further comprising a second three-way connector and a two-way valve;

the first port of the second three-way joint is connected with the conveying opening of the reaction injector, the second port of the second three-way joint is connected with the corresponding diluted reagent container, the third port of the second three-way joint is connected with the first port of the two-way valve, and the second port of the two-way valve is connected with the corresponding reaction tank.

8. The reagent delivery device of claim 7, further comprising a third three-way valve;

the common port of the third three-way valve is connected with the conveying opening of the reaction injector, the first port of the third three-way valve is connected with the first port of the second three-way joint, the second port of the third three-way valve is connected with the conveying opening of the corresponding auxiliary pushing injector, and the motor connected with the auxiliary pushing injector is different from the driving motor.

9. A sample analyser comprising a sample introduction means, a reaction means and a reagent delivery means as claimed in any one of claims 1 to 8;

the sample injection device is connected with the reagent conveying device, and the reagent conveying device is connected with the reaction device.

10. The sample analyzer of claim 9, wherein the sample analyzer is a blood cell analyzer.