Liquid adding device

Abstract

The utility model relates to a biological reaction device, in particular to a liquid adding device. A liquid adding device comprises a liquid adding body, a reagent assembly and a cleaning assembly, wherein the reagent assembly and the cleaning assembly are arranged on the liquid adding body. The reagent assembly comprises a pipette and a first driving mechanism which are arranged on the liquid adding main body; the first driving mechanism drives the pipette to move up and down relative to the liquid adding main body, so that the head of the pipette extends downwards and is recycled; the cleaning assembly comprises a liquid suction pipe, an air blowing pipe, a liquid outlet pipe and a second driving mechanism which are arranged on the liquid adding main body; the second driving mechanism drives the cleaning assembly to move up and down relative to the liquid adding body. The reagent assembly and the cleaning assembly are integrally and conveniently operated, so that the operations of reagent adding and cleaning can be quickly realized. Wherein the pipette is arranged on the liquid adding main body, and liquid suction and pipetting are carried out through the first driving mechanism, so that the liquid adding device can be suitable for experiments under sterile harsh conditions such as biology and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a biological reaction device, especially to a liquid adding device. BACKGROUND

[0002] In the field of chemical analysis, medical detection, food safety and life science research, liquid adding operation is an indispensable core step. However, the existing liquid adding device has the following shortcomings:

[0003] 1. Low operation efficiency: the liquid adding device in the prior art usually needs frequent manual replacement of the gun head and manual control of the cleaning assembly, resulting in low overall work efficiency.

[0004] 2. High pollution risk: some devices lack efficient gun head cleaning and waste liquid management systems, which can easily lead to sample cross-contamination and affect the accuracy of experimental results.

[0005] 3. Low functional integration: traditional liquid adding devices have single functions and cannot meet various experimental needs, such as complex multi-reagent liquid adding, sample incubation, etc. INVENTION CONTENTS

[0006] (I) Technical problem to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a liquid adding device which integrates a reagent assembly and a cleaning assembly in an integrated structure, can quickly switch between cleaning and liquid adding, and can realize quick operation of multi-reagent replacement, prevent cross-contamination, and improve experimental efficiency.

[0008] (II) Technical scheme

[0009] In order to achieve the above-mentioned purposes, the utility model adopts the main technical scheme including:

[0010] A liquid adding device includes a liquid adding main body and a reagent assembly and a cleaning assembly arranged on the liquid adding main body;

[0011] The reagent assembly includes a pipette arranged on the liquid adding main body and a first driving mechanism; the first driving mechanism drives the pipette to move up and down relative to the liquid adding main body, so that the gun head of the pipette extends downward and is recovered;

[0012] The cleaning assembly includes a suction tube, a blowing tube, a liquid outlet pipe and a second driving mechanism arranged on the liquid adding main body; the second driving mechanism drives the cleaning assembly to move up and down relative to the liquid adding main body.

[0013] The reagent assembly and the cleaning assembly are integrally and conveniently operated, and the operations of adding reagents and cleaning can be quickly realized.

[0014] In the scheme, the pipette moves up and down under the driving of the first driving mechanism, and precise reagent adding is realized.

[0015] Particularly, the gas blowing pipe is also provided, and the gas blowing function of the gas blowing pipe can accelerate the drying of the target object after cleaning.

[0016] The up-and-down movement function of the reagent assembly and the cleaning assembly can be switched at any time to prevent cross contamination.

[0017] Further, the cleaning assembly and the reagent assembly are respectively arranged on two sides of the liquid adding main body to prevent cross contamination.

[0018] Optionally, the control unit is further provided, and the control unit is signal-connected to the first driving mechanism and the second driving mechanism to respectively drive the movement of the cleaning assembly and the reagent assembly.

[0019] Optionally, the pipette head frame is fixedly arranged, and the pipette head frame is provided with a plurality of clamping grooves for placing the pipette heads and a plurality of pipette heads which can correspondingly adsorb different reagents and are clamped in the clamping grooves.

[0020] Optionally, the cleaning assembly further comprises a water tank, a waste liquid tank, a liquid outlet pipe, a liquid suction pipe and a gas blowing pipe which are detachably arranged on the liquid adding main body, and the pipe openings of the liquid outlet pipe, the liquid suction pipe and the gas blowing pipe are downwardly arranged and are arranged out of one horizontal plane.

[0021] The other end of the liquid outlet pipe away from the pipe opening is connected to the liquid outlet of the water tank, and the liquid outlet pipe is provided with a first valve for controlling the liquid outlet of the liquid outlet pipe.

[0022] The other end of the liquid suction pipe away from the pipe opening is connected to the liquid inlet of the waste liquid tank, and the liquid suction pipe is provided with a second valve for controlling the liquid suction of the liquid suction pipe.

[0023] Optionally, the control unit controls the opening and closing of the first valve and the second valve through signals.

[0024] Optionally, the workbench is further provided with a mechanical arm assembly,

[0025] Optionally, the mechanical arm assembly moves the liquid adding main body in three-dimensional directions through a mechanical arm.

[0026] The utility model discloses a mechanical arm subassembly realizes the movement of liquid adding main body in three -dimensional direction, further, the control unit controls the movement and the stay of specific position of mechanical arm subassembly.

[0027] Optionally, a plurality of reagent storage grooves are further arranged on the workbench to correspondingly place fixed reagent bottles.

[0028] Optionally, the incubation assembly further comprises a sample carrier placement area, and the sample carrier placement area serves as an action object of the reagent assembly and the cleaning assembly.

[0029] Optionally, the incubation assembly comprises an incubation rack, the incubation rack comprises a plurality of parallel incubation trays, each incubation tray is connected with an adjacent incubation tray through at least one support structure, each incubation tray can be independently pushed out, and the incubation tray serves as the sample carrier placement area.

[0030] In the scheme, rapid operation for multi-reagent replacement is provided, cross contamination is prevented, and experimental efficiency is improved.

[0031] Optionally, the incubation rack further comprises a blowing disc, the blowing disc can be independently pushed out relative to the incubation tray, and the blowing disc is provided with a blowing port.

[0032] The blowing disc is independently pushed out to provide blowing function, ensure uniform adhesion of reagents, and reduce interference of residual liquid on detection.

[0033] Optionally, the incubation rack further comprises a cleaning disc, and an outlet is arranged on the inner side wall of the cleaning disc.

[0034] Optionally, the incubation rack further comprises a mechanical arm subassembly, the third mechanical arm subassembly can simultaneously adsorb and transfer more than one sample carrier, a plurality of sample carriers can be simultaneously processed, operation time is shortened, and system efficiency is significantly improved.

[0035] (Three) beneficial effects

[0036] The utility model discloses the beneficial effects are:

[0037] The liquid adding device improves the automation degree of liquid adding operation, realizes multi-gun head reagent switching and automatic cleaning, and significantly improves work efficiency. By optimizing the design of the cleaning assembly, the risk of sample cross contamination is effectively reduced, and the reliability of experimental results is ensured. The combination of the mechanical arm subassembly and the incubation assembly enables the device to have diversified functions, meets the demand of complex experimental operation, and is highly adaptable. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 Figure 1 is a structural schematic diagram of a liquid adding device according to an embodiment of the present application;

[0039] Figure 2 Figure 2 is a structural schematic diagram of a liquid adding device according to another embodiment of the present application;

[0040] Figure 3 Figure 3 is a structural schematic diagram of an incubation device according to an embodiment of the present application;

[0041] Figure 4 Figure 4 is a structural schematic diagram of a reagent storage tank according to an embodiment of the present application;

[0042] Figure 5 Figure 5 is an enlarged structural schematic diagram of a blowing disc according to an embodiment of the present application;

[0043] Figure 6 Figure 6 is an enlarged structural schematic diagram of a cleaning disc according to an embodiment of the present application.

[0044] The reference signs involved in the above-mentioned figures are explained as follows:

[0045] 11, liquid adding main body; 12, reagent assembly; 121, pipette; 13, cleaning assembly; 131, liquid suction tube; 132, blowing tube; 133, liquid outlet tube;

[0046] 2, incubation device; 21, first incubation rack; 22, second incubation rack; 23, incubation disc; 24, blowing disc; 25, blowing port; 26, push-pull piece; 261, push-pull rod; 262, buckling block; 263, buckling hole; 27, cleaning disc; 28, second water outlet; 29, pipette head rack;

[0047] 3, workbench; 4, reagent storage tank;

[0048] 5, mechanical arm assembly; 51, X-direction moving group; 52, mechanical arm; 53, Y-direction motor. DETAILED DESCRIPTION

[0049] In order to better explain the present application and facilitate understanding, the exemplary embodiments of the present application will be described in more detail below. Although the exemplary embodiments of the present application are shown below, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present application can be more clearly, thoroughly understood and the scope of the present application can be completely conveyed to those skilled in the art.

[0050] The term "embodiment" is mentioned in this document means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0051] Unless otherwise defined, the meaning of technical terms used in this document is the same as that generally understood by those skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0052] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this document generally represents that the associated objects before and after are a "or" logical relationship.

[0053] In this application, such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between them.

[0054] In this application, without more limitation, the "includes", "contains", "has" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent in such process, method or product.

[0055] As the same understanding as in the "Guidelines for Examination", in this application, "greater than", "less than", "exceed" and other expressions are understood as not including the number; "above", "below", "within" and other expressions are understood as including the number. In addition, the meaning of "multiple" in the description of the embodiments of the present application is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly limited.

[0056] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0057] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0058] Example 1

[0059] like Figure 1 As shown: This embodiment provides a liquid addition device.

[0060] The liquid dispensing device includes a liquid dispensing body 11 and a reagent assembly 12 and a cleaning assembly 13 disposed on the liquid dispensing body 11; the reagent assembly 12 includes a pipette 121 and a first drive mechanism disposed on the liquid dispensing body 11.

[0061] The first driving mechanism drives the pipette 121 to move up and down relative to the liquid dispensing body 11, so that the tip of the pipette 121 extends downward and retracts.

[0062] In some other specific embodiments,

[0063] The first drive mechanism includes a first motor, a rotating shaft, gears, and a drive belt.

[0064] The output shaft of the first motor is connected to the rotating shaft. Rotating shafts are respectively provided at the upper and lower ends of the liquid dispensing body 11. Gears are fixedly provided on the rotating shafts, and drive belts are provided on the gears. Part of the drive belts are fixedly connected to the pipette 121. The control device is connected to the first drive mechanism through a signal to control its movement of the liquid dispensing body 11.

[0065] In some other embodiments, the pipette 121 comprises a body, a suction head, a suction button, a suction head ejecting button, the suction head is arranged below the body, a suction head connector, a piston mechanism, an ejecting mechanism control element;

[0066] The telescopic end of the electric telescopic mechanism is downward and opposite to the top of the suction button, the electric telescopic mechanism is connected with the power supply through the controller, and the telescoping of the electric telescopic mechanism is controlled through the controller, and the controller is supplied with a control signal.

[0067] In some other embodiments, as shown in Figure 1 The pipette 121 head rack 29 is fixedly arranged, the pipette 121 head rack 29 is provided with a plurality of clamping grooves for placing the suction head and a plurality of suction heads clamped in the clamping grooves, and the plurality of suction heads are arranged to correspond to different reagents.

[0068] In some other embodiments,

[0069] As shown in Figure 1 The cleaning assembly 13 comprises a suction pipe 131, an air blowing pipe 132, a liquid outlet pipe 133 and a second driving mechanism arranged on the liquid adding body 11, the second driving mechanism drives the cleaning assembly 13 to move up and down relative to the liquid adding body 11 in the Z direction.

[0070] In some other embodiments, the cleaning assembly 13 comprises a suction pipe 131, an air blowing pipe 132, a liquid outlet pipe 133, a water tank, a waste liquid tank and a first driving mechanism arranged on the liquid adding body 11,

[0071] The water tank and the waste liquid tank are detachably arranged on the liquid adding body 11,

[0072] The other end of the liquid outlet pipe 133 is connected to the liquid outlet of the water tank, the liquid outlet pipe 133 is provided with a first valve, and the pipe opening of the liquid outlet pipe 133 is arranged downward; the other end of the suction pipe 131 is connected to the liquid inlet of the waste liquid tank, the suction pipe 131 is provided with a second valve, and the pipe opening of the suction pipe 131 is arranged downward; the pipe opening of the air blowing pipe 132 is arranged downward; the pipe openings of the liquid outlet pipe 133, the suction pipe 131 and the air blowing pipe 132 are not arranged on the same horizontal plane; preferably, the pipe opening of the suction pipe 131 is arranged at the lowermost end, and the pipe opening of the liquid outlet pipe 133 is arranged at the uppermost end.

[0073] In some other embodiments, the control device controls the opening and closing of the first valve and the second valve through signals.

[0074] In some other embodiments, the liquid adding device further comprises a mechanical arm assembly, the mechanical arm assembly comprises an X-direction moving assembly 51 and a Y-direction moving assembly arranged on the X-direction moving assembly 51, and the liquid adding main body 11 is arranged on the Y-direction moving assembly. The mechanical arm assembly 5 drives the liquid adding main body 11 to move in three-dimensional directions, so that the liquid adding main body 11 moves to a desired position and adds reagent.

[0075] The Y-direction moving assembly comprises a Y-direction sliding block arranged on the mechanical arm 52 and sliding along the mechanical arm 52, and a Y-direction motor 53 driving the Y-direction sliding block. The liquid adding main body 11 is connected to the Y-direction sliding block.

[0076] In some other embodiments, the control unit is signal-connected to the first motor of the first driving mechanism and the cleaning motor of the second driving mechanism, respectively driving the movement of the cleaning assembly 13 and the reagent assembly 12; and is signal-connected to the X-direction motor and the Y-direction motor 53, controlling the movement of the liquid adding assembly in the X-direction and the Y-direction.

[0077] In some other embodiments, the workbench 3 is further provided with a plurality of reagent storage slots 5 corresponding to the fixed reagent bottles. The liquid adding control unit is signal-connected to the electric telescopic mechanism. The liquid adding control unit controls the liquid adding main body to suck specific reagent at a specific position of the reagent storage slot 5 by cooperatively controlling the X-direction motor and the Y-direction motor 53 and the electric telescopic mechanism.

[0078] Embodiment 2

[0079] The liquid adding device of the embodiment 1 further comprises: Figures 2-6 As shown in the figure, the incubation device comprises a first incubation rack 21 and a second incubation rack 22, the first incubation rack 21 and the second incubation rack 22 each comprise a plurality of parallel incubation plates 23, each incubation plate 23 is connected to an adjacent layer by at least one support structure, and each incubation plate 23 is provided with a plurality of slot positions for placing sample carriers; each incubation plate 23 can be independently pushed out.

[0080] In some other embodiments, the first incubation rack 21 or the second incubation rack 22 is further provided with a blowing plate 24 parallel to the incubation plate 23, the blowing plate 24 can be independently pushed out relative to the incubation plate 23; the blowing plate 24 is provided with a blowing port 25, the blowing port 25 is configured as a directional airflow, preferably vertically upward, and the blowing plate 24 is connected to the incubation rack by two guide rails, the guide rails drive the blowing plate 24 to move along the guide rails by a motor, and the motor is controlled by a controller.

[0081] The blowing port 25 is connected to a compressed gas source or a gas pump by a blowing pipe 132.

[0082] The push-pull piece 26 is connected to the incubation plate 23 for pushing out the incubation plate 23.

[0083] The controller is connected to the compressed air source or air pump through a signal, and controls the opening, closing and running intensity of the compressed air source or air pump.

[0084] The controller is connected to the transfer motor through a signal, and controls the forward movement of the push-pull piece 26.

[0085] As shown in the drawings, the lower end of the first incubation rack 21 or the second incubation rack 22 is also provided with a cleaning tray 27, and the inner side wall of the cleaning tray 27 is provided with a second water outlet 28. Figure 4 In some other specific embodiments, the push-pull piece 26 is arranged between the first incubation rack 21 and the second incubation rack 22, and each incubation tray 23 is provided with a buckling hole 263.

[0086] As shown in the drawings, the push-pull piece 26 includes a push-pull piece 26 main body, a first sliding block and a second lifting structure arranged on the push-pull piece 26 main body, the first sliding block is respectively connected with a push-pull rod 261 on the left and right sides thereof, the push-pull rod 261 is provided with a buckling block 262 matched with the buckling hole 263, the buckling block 262 is an L-shaped structure extending out of the outer side of the push-pull rod 261, and one end of the L-shaped structure is arranged downward.

[0087] Figure 3 Optionally, the first sliding block includes a left sliding block and a right sliding block, and the left sliding block and the right sliding block are respectively connected with the push-pull rod 261.

[0088] The push-pull piece 26 main body drives the left sliding block and the right sliding block to move up and down in the Z direction through the second lifting structure, so as to selectively move the push-pull rod 261 to be buckled with any one of the incubation trays 23, and the push-pull piece 26 main body moves in the Y direction through the Y direction moving module, so as to realize the pushing out of the incubation tray 23 by the push-pull rod 261.

[0089] Among them, the controller is connected to the transfer motor through a signal, controls the lifting of the second lifting mechanism 14, and is connected to the Y direction moving module through a signal to control the Y direction movement of the push-pull piece 26 main body.

[0090] Among them, the second lifting mechanism includes a second stepper motor, a driving second lead screw and a guide rail, the shaft of the second stepper motor is directly connected to the driving second lead screw; the driving second lead screw converts the rotary motion of the second stepper motor into linear motion. The second lead screw passes through a fixed nut, and the nut is fixed on the second sliding block, but allows the second lead screw to rotate freely. When the second stepper motor rotates, the second lead screw does not rotate, but drives the nut and the attached second sliding block to move along the axial direction of the second lead screw.

[0091] Among them, the second lifting mechanism includes a second stepper motor, a driving second lead screw and a guide rail, the shaft of the second stepper motor is directly connected to the driving second lead screw; the driving second lead screw converts the rotary motion of the second stepper motor into linear motion. The second lead screw passes through a fixed nut, and the nut is fixed on the second sliding block, but allows the second lead screw to rotate freely. When the second stepper motor rotates, the second lead screw does not rotate, but drives the nut and the attached second sliding block to move along the axial direction of the second lead screw.

[0092] ​To ensure the stable and precise movement of the second slider in the Z direction, the second lifting mechanism is equipped with two parallel guide rails. The second slider is equipped with ball bearings or second sliders that cooperate with the guide rails, which surround the guide rails and provide smooth, low-friction movement.

[0093] The Y-direction movement module includes a servo motor, a gear, and a guide rail,

[0094] The Y-direction movement module is powered by a servo motor equipped with a high-precision encoder for monitoring and controlling position and speed, ensuring the accuracy of movement.

[0095] The power of the servo motor is transmitted to a rack meshing with the gear through a gear connected to the shaft of the servo motor. The rack is fixed to the workbench 3 and extends in the direction of the preset movement of the Y-direction movement module on the Y axis. The rotation of the gear causes the push-pull piece 26 body connected with the rack to move along the Y axis.

[0096] The guide rail is used to keep the push-pull piece 26 body moving linearly and stably, and the push-pull piece 26 body interacts with the guide rail through ball bearings or sliding bearings.

[0097] The push-pull piece 26 body is connected to the first slider connecting arm through one or more transverse connecting arms, allowing the linear movement of the Z-direction second lifting structure to cooperate with the linear movement of the Y-direction movement module, and accurately controlling the position of the incubation tray 23.

[0098] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A liquid adding device characterized by comprising: It includes a liquid adding body (11) and a reagent assembly (12) and a cleaning assembly (13) arranged on the liquid adding body (11); The reagent assembly (12) comprises a pipette gun (121) arranged on the liquid adding body (11), a first driving mechanism; the first driving mechanism drives the pipette gun (121) to move up and down relative to the liquid adding body (11), so that the gun head of the pipette gun (121) extends downward and recovers; The cleaning assembly (13) comprises a liquid suction tube (131), a gas blowing tube (132), a liquid outlet tube (133), and a second driving mechanism arranged on the liquid adding body (11); the second driving mechanism drives the cleaning assembly (13) to move up and down relative to the liquid adding body (11).

2. The liquid adding device according to claim 1, wherein It further comprises a control unit connected to the first driving mechanism and the second driving mechanism by signals, respectively driving the movement of the cleaning assembly (13) and the reagent assembly (12).

3. The liquid adding device according to claim 1, wherein: It further comprises a fixedly arranged pipette gun head rack (29); the pipette gun head rack (29) is provided with a plurality of clamping grooves for placing the gun head and a plurality of gun heads which can correspondingly adsorb different reagents.

4. The liquid adding device according to claim 1, wherein The cleaning assembly (13) further comprises a water tank and a waste liquid tank which are detachably arranged on the liquid adding body (11), The pipe openings of the liquid outlet tube (133), the liquid suction tube (131) and the gas blowing tube (132) are arranged downward and not in the same horizontal plane; The other end of the liquid outlet tube (133) away from the pipe opening is connected to the liquid outlet of the water tank, and the liquid outlet tube (133) is provided with a first valve for controlling the liquid outlet of the liquid outlet tube (133); The other end of the liquid suction tube (131) away from the pipe opening is connected to the liquid inlet of the waste liquid tank, and the liquid suction tube (131) is provided with a second valve for controlling the liquid suction of the liquid suction tube (131).

5. The liquid adding device according to claim 4, wherein: It further comprises a cleaning control unit for controlling the opening and closing of the first valve and the second valve.

6. The liquid adding device according to claim 1, wherein: It further comprises a workbench (3), and the workbench is provided with a mechanical arm assembly, The mechanical arm assembly moves the liquid adding body (11) in three-dimensional directions through a mechanical arm.

7. The liquid adding device according to claim 6, wherein: The workbench (3) is further provided with a plurality of reagent storage grooves for placing fixed reagent bottles.

8. The liquid adding device according to claim 1, wherein It further comprises an incubation assembly provided with a sample carrier placement area, and the sample carrier and the sample carrier placement area are the action objects of the reagent assembly (12) and the cleaning assembly (13).

9. The liquid adding device according to claim 8, wherein The incubation assembly comprises an incubation rack, and the incubation rack comprises a plurality of parallel incubation discs (23), each incubation disc (23) is connected with an adjacent incubation disc (23) through at least one supporting structure; each incubation disc (23) can be independently pushed out; and the incubation disc is the sample carrier placement area.

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