CN219915650U - Sample analyzer - Google Patents

Abstract

A sample analyzer includes a sample dispensing device, a reagent dispensing device, a sample detecting device, and a washing device. The sample dispensing device comprises a sample needle and a sample needle driving mechanism, wherein the sample needle driving mechanism is used for driving the sample needle to suck a sample from a sample container and dispense the sample into a reaction container. The reagent dispensing device comprises a reagent needle and a reagent needle driving mechanism, wherein the reagent needle driving mechanism is used for driving the reagent needle to suck reagent from the reagent container and dispense the reagent into the reaction container. The sample detection device is used for detecting a sample in the reaction vessel. The cleaning device comprises a cleaning solution supply mechanism and a cleaning mechanism, wherein the sample needle and/or the reagent needle is/are cleaned at the cleaning mechanism, the cleaning solution supply mechanism comprises a cleaning solution barrel, a buffer container and a liquid outlet pipe, and the buffer container is connected with the cleaning solution barrel through a conveying pipe. The liquid outlet pipe is connected with the buffer container and extends to the cleaning mechanism. The lowest liquid level of the cleaning liquid barrel is higher than that of the buffer container.

Description

Sample analyzer

Technical Field

The utility model relates to the field of medical instruments, in particular to a sample analyzer.

Background

Typically, a sample analyzer is provided with a cleaning device comprising a cleaning mechanism for cleaning parts of the sample analyzer, e.g. for cleaning reagent and/or sample needles of the sample analyzer, and a cleaning liquid supply mechanism. The cleaning liquid supply mechanism is used for supplying cleaning liquid to the cleaning mechanism.

The cleaning liquid supply mechanism generally employs a cleaning liquid tank of a fixed package, such as 5L or 10L, and if the residual amount of the liquid in the cleaning liquid tank is too large, not only waste is caused but also complaints are incurred by users. In order to solve the technical problem, the prior method is to add a buffer container, a pump and a bubble sensor, wherein the pump is used for conveying the cleaning liquid in the cleaning liquid barrel into the buffer container, the buffer container is conveyed to the cleaning mechanism, and when the bubble sensor detects bubbles, the bubbles indicate that the cleaning liquid in the cleaning liquid barrel is about to be sucked clean, so that the liquid residual quantity in the cleaning liquid barrel can be reduced. However, this embodiment adds a pump and bubble sensor, which is costly.

Disclosure of Invention

In view of this, the present utility model proposes a sample analyzer.

The sample analyzer according to the first aspect of the present utility model comprises:

the sample dispensing device comprises a sample needle and a sample needle driving mechanism, wherein the sample needle driving mechanism is used for driving the sample needle to suck a sample from a sample container and dispense the sample into a reaction container;

the reagent dispensing device comprises a reagent needle and a reagent needle driving mechanism, wherein the reagent needle driving mechanism is used for driving the reagent needle to suck reagent from a reagent container and dispense the reagent into a reaction container;

sample detection means for detecting a sample made of the sample and the reagent in the reaction container;

a cleaning device including a cleaning liquid supply mechanism and a cleaning mechanism, the sample needle and/or the reagent needle being cleaned at the cleaning mechanism, the cleaning liquid supply mechanism being for supplying a cleaning liquid to the cleaning mechanism;

wherein the cleaning liquid supply mechanism includes:

a cleaning liquid barrel for accommodating cleaning liquid;

the buffer container is connected with the cleaning liquid barrel through a conveying pipe, and cleaning liquid in the cleaning liquid barrel is conveyed into the buffer container through the conveying pipe;

the liquid outlet pipe is connected with the buffer container and extends to the cleaning mechanism, and cleaning liquid in the buffer container is conveyed to the cleaning mechanism through the liquid outlet pipe;

wherein, the liquid level of the cleaning liquid barrel is higher than the liquid level of the buffer container.

A sample analyzer according to a second aspect of the present utility model includes a sample analyzing mechanism and a cleaning liquid supplying mechanism, wherein the cleaning liquid supplying mechanism includes:

a cleaning liquid barrel for accommodating cleaning liquid;

the buffer container is connected with the cleaning liquid barrel through a conveying pipe, and cleaning liquid in the cleaning liquid barrel is conveyed into the buffer container through the conveying pipe;

the liquid outlet pipe is connected with the buffer container and extends to the sample analysis mechanism, and cleaning liquid in the buffer container is conveyed to the sample analysis mechanism through the liquid outlet pipe;

wherein, the liquid level of the cleaning liquid barrel is higher than the liquid level of the buffer container.

A sample analyzer according to a third aspect of the present utility model includes:

the sample dispensing device comprises a sample needle and a sample needle driving mechanism, wherein the sample needle driving mechanism is used for driving the sample needle to suck a sample from a sample container and dispense the sample into a reaction container;

the reagent dispensing device comprises a reagent needle and a reagent needle driving mechanism, wherein the reagent needle driving mechanism is used for driving the reagent needle to suck reagent from a reagent container and dispense the reagent into a reaction container;

sample detection means for detecting a sample made of the sample and the reagent in the reaction container;

a cleaning device including a cleaning liquid supply mechanism and a cleaning mechanism, the sample needle and/or the reagent needle being cleaned at the cleaning mechanism, the cleaning liquid supply mechanism being for supplying a cleaning liquid to the cleaning mechanism;

wherein the cleaning liquid supply mechanism includes:

the cleaning solution container is used for containing cleaning solution, an injection port is arranged at the top of the cleaning solution container, and the cleaning solution is injected into the cleaning solution container through the injection port;

the buffer container is connected with the bottom of the cleaning liquid container through a conveying pipe, and the cleaning liquid in the cleaning liquid barrel is conveyed into the buffer container through the conveying pipe;

the liquid outlet pipe is connected with the buffer container and extends to the cleaning mechanism, and cleaning liquid in the buffer container is conveyed to the cleaning mechanism through the liquid outlet pipe;

wherein the lowest liquid level of the cleaning liquid container is higher than the lowest liquid level of the buffer container.

According to the technical scheme, the sample analyzer provided by the first aspect of the utility model has the advantages that the lowest liquid level of the cleaning liquid barrel is higher than the lowest liquid level of the buffer container, so that the cleaning liquid can be directly conveyed from the cleaning liquid barrel to the buffer container under the action of gravity without additionally arranging a pump and a bubble sensor, the cost is reduced, in addition, the lowest liquid level of the cleaning liquid barrel is higher than the lowest liquid level of the buffer container, the cleaning liquid barrel can be completely conveyed to the buffer container, the residual quantity of the cleaning liquid is low, and the waste of the cleaning liquid can be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without the inventive effort.

FIG. 1 is a schematic diagram of a sample analyzer according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a cleaning solution supply mechanism according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a cleaning solution supply mechanism according to another embodiment of the present utility model;

FIG. 4 is a schematic control diagram of a cleaning solution supply mechanism according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a cleaning solution supply mechanism according to another embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. Based on the embodiments of the present utility model, other embodiments that may be obtained by those of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

As shown in fig. 1, an embodiment of the present utility model proposes a sample analyzer including a sample dispensing device 10, a reagent dispensing device 20, a sample detecting device 30, and a washing device 40.

The sample dispensing device 10 includes a sample needle and a sample needle drive mechanism for driving the sample needle to aspirate a sample from a sample container and dispense the sample into a reaction container. In some embodiments, the sample needle drive mechanism comprises a two-or three-dimensional drive mechanism that drives the sample needle in a spatial two-or three-dimensional motion.

The reagent dispensing device 20 includes a reagent needle and a reagent needle driving mechanism for driving the reagent needle to aspirate a reagent from a reagent container and dispense the reagent into a reaction container. In some embodiments, the reagent needle drive mechanism comprises a two-or three-dimensional drive mechanism that drives the reagent needle in a spatial two-or three-dimensional motion.

The sample detection device 30 is used for detecting a sample made of a sample and a reagent in a reaction container. In some embodiments, the sample detection device 30 includes a light measurement component, where the light measurement component is configured to perform light measurement on the incubated reaction solution to obtain reaction data of the sample, for example, the light measurement component detects the luminescence intensity of the reaction solution to be detected, and calculates the concentration of the component to be detected in the sample through a calibration curve.

The cleaning device 40 includes a cleaning liquid supply mechanism 41 and a cleaning mechanism 42, the sample needle and/or the reagent needle being cleaned at the cleaning mechanism 42, the cleaning liquid supply mechanism 41 being for supplying the cleaning liquid to the cleaning mechanism 42.

As shown in fig. 2, in some embodiments, the cleaning liquid supply mechanism 41 includes a cleaning liquid tank 411, a buffer container 412, and a liquid outlet pipe 413, the cleaning liquid tank 411 being for containing cleaning liquid. The buffer container 412 is connected to the cleaning liquid tank 411 through a delivery pipe 414, and the cleaning liquid in the cleaning liquid tank 411 is delivered into the buffer container 412 through the delivery pipe 414. The liquid outlet pipe 413 is connected to the buffer container 412 and extends to the cleaning mechanism 42, and the cleaning liquid in the buffer container 412 is supplied to the cleaning mechanism 42 through the liquid outlet pipe 413. Wherein the liquid level of the cleaning liquid tank 411 is higher than the liquid level of the buffer container 412. For example, when the cleaning solution tank 411 is being placed, the bottom of the cleaning solution tank 411 is the lowest level of the cleaning solution tank 411, and when the cleaning solution tank 411 is placed upside down, the opening of the cleaning solution tank 411 is the lowest level of the cleaning solution tank 411, and the bottom of the buffer container 412 is the lowest level of the buffer container 412. The cleaning mechanism 42 may be, but is not limited to, a cleaning tank.

According to the sample analyzer provided by the embodiment of the utility model, the lowest liquid level of the cleaning liquid barrel 411 is higher than the lowest liquid level of the buffer container 412, so that cleaning liquid can be directly conveyed from the cleaning liquid barrel 411 to the buffer container 412 under the action of gravity without additionally arranging a pump and a bubble sensor, the cost is reduced, in addition, the lowest liquid level of the cleaning liquid barrel 411 is higher than the lowest liquid level of the buffer container 412, all the cleaning liquid barrel 411 can be conveyed to the buffer container 412, the residual quantity of the cleaning liquid is low, and the waste of the cleaning liquid is avoided.

As shown in fig. 2, in some embodiments, the cleaning solution tank 411 has a tub opening 4111, and the delivery pipe 414 is connected to the tub opening 4111, and the cleaning solution tank 411 is disposed upside down with the tub opening 4111 facing downward, and the tub opening 4111 is higher than the lowest liquid level of the buffer container 412. In the actual use process, when the cleaning solution in the cleaning solution tank 411 is used up, the operator connects the delivery pipe 414 with the opening 4111 of the other cleaning solution tank 411, and then lifts up the new cleaning solution tank and places the tank upside down in the place.

Of course, the cleaning solution tank 411 may be placed in a forward direction, and in this embodiment, an opening may be provided at the bottom of the cleaning solution tank 411, and the delivery pipe 414 communicates with the opening.

As shown in fig. 2, in some embodiments, the cleaning solution tank 411 includes a tank body 4112 and a surrounding wall 4113, the tank body 4112 includes a top portion and a bottom portion opposite to the top portion, the surrounding wall 4113 is disposed on the top portion of the tank body 4112 and communicates with the interior of the tank body 4112, and an end of the surrounding wall 4113 remote from the tank body 4112 forms the tank opening 4111. Optionally, in some embodiments, the cleaning solution tank 411 further includes a tank cover screwed with the surrounding wall 4113, and the tank cover is used to close the tank opening 4111. Optionally, in some embodiments, the delivery tube 414 is connected to the lid.

As shown in fig. 2, in some embodiments, the cleaning solution tank 411 has a bottom wall 4114 opposite the bung 4111, the cleaning solution supply mechanism 41 further includes a first breather pipe 415, the first breather pipe 415 includes a first end and a second end, the first end of the first breather pipe 415 extends from the bung 4111 into the interior of the cleaning solution tank 411 and extends to near the bottom wall 4114 of the cleaning solution tank 411, and the second end of the first breather pipe 415 is located outside the cleaning solution tank 411 and above the cleaning solution tank 411. The first breather pipe 415 plays a role in balancing the air pressure inside the cleaning solution tank 411, so that the cleaning solution inside the cleaning solution tank 411 can be smoothly transferred into the buffer container 412. In this embodiment, the first breather pipe 415 extends into the cleaning solution barrel 411 from the position of the barrel opening 4111, and the cleaning solution barrel 411 does not need to be provided with another through hole except for the barrel opening 4111, so that the manufacturing process and accessories of the cleaning solution barrel 411 are simplified, the production efficiency can be improved, and the problem that the added through hole needs to be sealed and waterproof later is not considered. Of course, the bottom of the washing liquid tub 411 is provided with an opening, and the first ventilation pipe 415 may be connected to the opening.

As shown in fig. 2, in some embodiments, the cleaning solution supply mechanism 41 further includes a first check valve 416, where the first check valve 416 is mounted on the first breather pipe 415, and the first check valve 416 is used to prevent the cleaning solution in the cleaning solution tank 411 from flowing out of the first breather pipe 415. In the actual use process, after the new cleaning solution tank 411 is replaced, in the process that the operator lifts the cleaning solution tank 411 and places it upside down to the station, there may be a situation that the liquid level of the cleaning solution tank 411 is higher than the second end of the first breather pipe 415, in this embodiment, by installing the first check valve 416 on the first breather pipe 415, the situation that the liquid level of the cleaning solution tank 411 is higher than the second end of the first breather pipe 415, and the cleaning solution in the cleaning solution tank 411 flows out from the first breather pipe 415 can be avoided.

As shown in fig. 2, in some embodiments, the cleaning liquid supply mechanism 41 further includes a second check valve 417 connected to the delivery pipe 414, the second check valve 417 for preventing the cleaning liquid inside the buffer container 412 from flowing back to the cleaning liquid tank 411. In the actual use process, after the cleaning solution in the cleaning solution tank 411 is used, an operator needs to take the cleaning solution tank 411 off the station and place it on the ground to replace a new cleaning solution tank 411 filled with cleaning solution, in this process, the condition that the lowest level of the liquid level of the buffer container 412 is higher than that of the cleaning solution tank 411 will occur, in this embodiment, by installing the second check valve 417 on the conveying pipe 414, the condition that the lowest level of the liquid level of the buffer container 412 is higher than that of the cleaning solution tank 411, resulting in that the cleaning solution in the buffer container 412 flows back to the cleaning solution tank 411 can be avoided.

As shown in fig. 2, in some embodiments, the buffer container 412 has a water inlet 4121, the delivery tube 414 is connected to the water inlet 4121, the water inlet 4121 is higher than the bottom of the buffer container 412, and the volume between the water inlet 4121 and the bottom of the buffer container 412 is the first volume S of the buffer container 412, wherein the cleaning liquid of the first volume S satisfies the cleaning mechanism 42 to perform at least one cleaning operation. In this embodiment, when the cleaning liquid in the cleaning liquid tank 411 is used up, the cleaning liquid of the first capacity S satisfies the cleaning operation performed by the cleaning mechanism 42 at least once, so that the replacement of the cleaning liquid tank 411 without stopping can be realized, and thus the sample analysis efficiency can be improved.

As shown in fig. 2, in some embodiments, the top of the buffer container 412 is provided with an overflow port 4122, the cleaning solution supply mechanism 41 further includes an overflow pipe 418 and a third check valve 419, the overflow pipe 418 is connected to the overflow port 4122, the overflow pipe 418 is used for delivering the cleaning solution overflowed from the buffer container 412 to the waste liquid container, the third check valve 419 is mounted to the overflow pipe 418, and the third check valve 419 is used for preventing the liquid in the waste liquid container from flowing back into the buffer container 412.

As shown in fig. 2, in some embodiments, the cleaning solution supply mechanism 41 further includes a second vent tube 101, the second vent tube 101 including a first end and a second end, the first end of the second vent tube 101 extending into the buffer container 412 and being located at the top of the buffer container 412, the second end of the second vent tube 101 being located outside of the buffer container 412. The second ventilation pipe 101 is used for balancing the air pressure inside the buffer container 412, so that the cleaning solution inside the buffer container 412 can be smoothly delivered to the cleaning mechanism 42.

As shown in fig. 2, in some embodiments, the cleaning solution supply mechanism 41 further includes a fourth one-way valve 102, the fourth one-way valve 102 being mounted to the drain pipe 413, the fourth one-way valve 102 being configured to prevent the cleaning solution at the cleaning mechanism 42 from flowing back to the buffer container 412.

As shown in fig. 2, in some embodiments, the outlet tube 413 extends into the buffer vessel 412 and extends to the bottom of the buffer vessel 412. In this embodiment, it is possible to avoid a large amount of residual liquid remaining in the buffer vessel 412.

Of course, the arrangement is not limited to the above, and for example, in other embodiments, as shown in fig. 3, the bottom of the buffer container 412 is provided with a liquid outlet 4123, and the liquid outlet 413 is connected to the liquid outlet 4123.

As shown in fig. 2 and 4, in some embodiments, the cleaning solution supply mechanism 41 further includes a controller 103, an alarm device 104, and a sensor 105, the sensor 105 is mounted on the buffer container 412, and the sensor 105 is configured to generate a trigger signal when the liquid level in the buffer container 412 is below a preset value. Wherein, sensor 105 and alarm device 104 are all connected with the controller 103 electricity, and the controller 103 is used for controlling alarm device 104 to send the alarm to the user when receiving the trigger signal of sensor 105. It will be appreciated that when the liquid level in the buffer container 412 is lower than the preset value, it indicates that the cleaning liquid in the cleaning liquid tank 411 is used up, and in this embodiment, when the cleaning liquid in the cleaning liquid tank 411 is used up, the user can know in time, so that the cleaning liquid tank 411 can be replaced in time, and the influence on the subsequent sample analysis is avoided. Alternatively, the alarm device 104 may be an audible alarm device 104, such as a buzzer, or may be a light alarm device 104, such as an indicator light, or may be used to send an alarm in a screen display manner, which may be specific to actual design requirements. The sensor 105 may be, but is not limited to, a float level gauge.

As shown in fig. 2, an embodiment of the present utility model also proposes a sample analyzer including a sample analysis mechanism and a cleaning liquid supply mechanism 41, wherein the cleaning liquid supply mechanism 41 includes a cleaning liquid tank 411, a buffer container 412, and a liquid outlet pipe 413, and the cleaning liquid tank 411 is used for containing a cleaning liquid. The buffer container 412 is connected to the cleaning liquid tank 411 through a delivery pipe 414, and the cleaning liquid in the cleaning liquid tank 411 is delivered into the buffer container 412 through the delivery pipe 414. The liquid outlet pipe 413 is connected to the buffer container 412 and extends to the sample analysis mechanism, and the cleaning liquid in the buffer container 412 is supplied to the sample analysis mechanism through the liquid outlet pipe 413. Wherein the liquid level of the cleaning liquid tank 411 is higher than the liquid level of the buffer container 412.

As shown in fig. 1 and 5, an embodiment of the present utility model also proposes a sample analyzer including a sample dispensing device 10, a reagent dispensing device 20, a sample detecting device 30, and a washing device 40. The sample dispensing device 10 includes a sample needle and a sample needle drive mechanism for driving the sample needle to aspirate a sample from a sample container and dispense the sample into a reaction container. The reagent dispensing device 20 includes a reagent needle and a reagent needle driving mechanism for driving the reagent needle to aspirate a reagent from a reagent container and dispense the reagent into a reaction container. The sample detection device 30 is used for detecting a sample made of a sample and a reagent in a reaction container. The cleaning device 40 includes a cleaning liquid supply mechanism 41 and a cleaning mechanism 42, the sample needle and/or the reagent needle being cleaned at the cleaning mechanism 42, the cleaning liquid supply mechanism 41 being for supplying the cleaning liquid to the cleaning mechanism 42. The cleaning solution supply mechanism 41 includes a cleaning solution container 106, a buffer container 412, and a liquid outlet pipe 413, wherein the cleaning solution container 106 is used for containing cleaning solution, an injection port 1061 is provided at the top of the cleaning solution container 106, and the cleaning solution is injected into the cleaning solution container 106 through the injection port 1061. The buffer container 412 is connected to the bottom of the cleaning liquid container 106 through a delivery pipe 414, and the cleaning liquid in the cleaning liquid tank 411 is delivered into the buffer container 412 through the delivery pipe 414. The liquid outlet pipe 413 is connected to the buffer container 412 and extends to the cleaning mechanism 42, and the cleaning liquid in the buffer container 412 is supplied to the cleaning mechanism 42 through the liquid outlet pipe 413. Wherein the liquid level of the cleaning liquid container 106 is higher than the liquid level of the buffer container 412.

The sample analyzer proposed in the present embodiment can realize the replenishment of the cleaning liquid without stopping the machine, specifically, when the cleaning liquid in the cleaning liquid container 106 runs out, the operator can inject the cleaning liquid in the cleaning liquid tank 411 into the cleaning liquid container 106 from the injection port 1061, thereby realizing the replenishment of the cleaning liquid without stopping the machine. The cleaning solution container 106 may be, but is not limited to, a liquid reservoir disposed at the workstation.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (13)

1. A sample analyzer, comprising:

the sample dispensing device comprises a sample needle and a sample needle driving mechanism, wherein the sample needle driving mechanism is used for driving the sample needle to suck a sample from a sample container and dispense the sample into a reaction container;

the reagent dispensing device comprises a reagent needle and a reagent needle driving mechanism, wherein the reagent needle driving mechanism is used for driving the reagent needle to suck reagent from a reagent container and dispense the reagent into a reaction container;

sample detection means for detecting a sample made of the sample and the reagent in the reaction container;

a cleaning device including a cleaning liquid supply mechanism and a cleaning mechanism, the sample needle and/or the reagent needle being cleaned at the cleaning mechanism, the cleaning liquid supply mechanism being for supplying a cleaning liquid to the cleaning mechanism;

wherein the cleaning liquid supply mechanism includes:

a cleaning liquid barrel for accommodating cleaning liquid;

the buffer container is connected with the cleaning liquid barrel through a conveying pipe, and cleaning liquid in the cleaning liquid barrel is conveyed into the buffer container through the conveying pipe;

the liquid outlet pipe is connected with the buffer container and extends to the cleaning mechanism, and cleaning liquid in the buffer container is conveyed to the cleaning mechanism through the liquid outlet pipe;

wherein, the liquid level of the cleaning liquid barrel is higher than the liquid level of the buffer container.

2. The sample analyzer of claim 1, wherein the cleaning liquid tank has a tank mouth, the transport pipe is connected to the tank mouth, the cleaning liquid tank is arranged upside down with the tank mouth facing downward, and the tank mouth is higher than a lowest liquid level of the buffer container.

3. The sample analyzer of claim 2 wherein the cleaning solution cartridge has a bottom wall opposite the cartridge mouth, the cleaning solution supply mechanism further comprising:

the first vent pipe comprises a first end and a second end, the first end of the first vent pipe extends into the cleaning liquid barrel from the barrel opening and extends to be close to the bottom wall of the cleaning liquid barrel, and the second end of the first vent pipe is located outside the cleaning liquid barrel and higher than the cleaning liquid barrel.

4. The sample analyzer of claim 3, wherein the purge fluid supply mechanism further comprises a first one-way valve mounted to the first vent tube, the first one-way valve for preventing purge fluid in the purge fluid barrel from flowing out of the first vent tube.

5. The sample analyzer of claim 1, wherein the cleaning fluid supply mechanism further comprises a second one-way valve coupled to the delivery tube, the second one-way valve for preventing the cleaning fluid inside the buffer container from flowing back to the cleaning fluid tank.

6. The sample analyzer of claim 1, wherein the buffer vessel has a water inlet, the delivery tube is connected to the water inlet, the water inlet is higher than a bottom of the buffer vessel, and a volume between the water inlet and the bottom of the buffer vessel is a first volume of the buffer vessel, wherein the first volume of cleaning fluid satisfies the cleaning mechanism performing at least one cleaning operation.

7. The sample analyzer of claim 1, wherein the top of the buffer container is provided with a liquid overflow port, and the cleaning liquid supply mechanism further comprises an overflow pipe connected to the liquid overflow port, the overflow pipe being configured to convey the cleaning liquid overflowed from the buffer container to a waste liquid container, and a third check valve mounted to the overflow pipe, the third check valve being configured to prevent the liquid in the waste liquid container from flowing back into the buffer container.

8. The sample analyzer of claim 1, wherein the purge fluid supply mechanism further comprises a second vent tube, the second vent tube comprising a first end and a second end, the first end of the second vent tube extending into the buffer container and being positioned at a top of the buffer container, the second end of the second vent tube being positioned outside of the buffer container.

9. The sample analyzer of claim 1, wherein the cleaning solution supply mechanism further comprises a fourth one-way valve mounted to the outlet tube, the fourth one-way valve for preventing the cleaning solution at the cleaning mechanism from flowing back to the buffer container.

10. The sample analyzer of claim 1, wherein the outlet tube extends into the buffer container and to the bottom of the buffer container; or,

the bottom of the buffer container is provided with a liquid outlet, and the liquid outlet pipe is connected with the liquid outlet.

11. The sample analyzer of any one of claims 1 to 10, wherein the cleaning fluid supply mechanism further comprises:

a controller;

an alarm device;

the sensor is arranged on the buffer container and is used for generating a trigger signal when the liquid level in the buffer container is lower than a preset value;

the sensor and the alarm device are electrically connected with the controller, and the controller is used for controlling the alarm device to give an alarm to a user when receiving a trigger signal of the sensor.

12. A sample analyzer comprising a sample analysis mechanism and a cleaning fluid supply mechanism, wherein the cleaning fluid supply mechanism comprises:

a cleaning liquid barrel for accommodating cleaning liquid;

the buffer container is connected with the cleaning liquid barrel through a conveying pipe, and cleaning liquid in the cleaning liquid barrel is conveyed into the buffer container through the conveying pipe;

the liquid outlet pipe is connected with the buffer container and extends to the sample analysis mechanism, and cleaning liquid in the buffer container is conveyed to the sample analysis mechanism through the liquid outlet pipe;

wherein, the liquid level of the cleaning liquid barrel is higher than the liquid level of the buffer container.

13. A sample analyzer, comprising:

the sample dispensing device comprises a sample needle and a sample needle driving mechanism, wherein the sample needle driving mechanism is used for driving the sample needle to suck a sample from a sample container and dispense the sample into a reaction container;

the reagent dispensing device comprises a reagent needle and a reagent needle driving mechanism, wherein the reagent needle driving mechanism is used for driving the reagent needle to suck reagent from a reagent container and dispense the reagent into a reaction container;

sample detection means for detecting a sample made of the sample and the reagent in the reaction container;

a cleaning device including a cleaning liquid supply mechanism and a cleaning mechanism, the sample needle and/or the reagent needle being cleaned at the cleaning mechanism, the cleaning liquid supply mechanism being for supplying a cleaning liquid to the cleaning mechanism;

wherein the cleaning liquid supply mechanism includes:

the cleaning solution container is used for containing cleaning solution, an injection port is arranged at the top of the cleaning solution container, and the cleaning solution is injected into the cleaning solution container through the injection port;

the buffer container is connected with the bottom of the cleaning liquid container through a conveying pipe, and the cleaning liquid in the cleaning liquid container is conveyed into the buffer container through the conveying pipe;

the liquid outlet pipe is connected with the buffer container and extends to the cleaning mechanism, and cleaning liquid in the buffer container is conveyed to the cleaning mechanism through the liquid outlet pipe;

wherein the lowest liquid level of the cleaning liquid container is higher than the lowest liquid level of the buffer container.