Magnetic stirring resuspension nozzle device

Abstract

The utility model relates to the technical field of biological 3D printing, and discloses a magnetic stirring resuspension nozzle device which comprises a needle tube assembly, a spray head and a magnetic assembly, the needle tube assembly comprises a suspension tube and a shell, the suspension tube is arranged in the shell, the shell is provided with an air vent, the air vent is communicated into a cavity of the suspension tube, and the magnetic assembly is arranged in the cavity of the suspension tube. The spray head is arranged at the other end, opposite to the air port, of the needle tube assembly and communicated with the interior of a cavity of the suspension tube, the magnetic assembly is arranged at one end of the shell, at least part of the suspension tube is located on the inner side of the magnetic assembly, and a suspension rotor is arranged in the suspension tube and opposite to the magnetic assembly. The stirring assembly is used for rotationally stirring liquid in the suspension pipe under the magnetic action of the magnetic assembly. According to the utility model, the cell suspension can be uniformly remixed in the biological 3D printing process.

Description

Technical Field

[0001] This invention belongs to the field of bio-3D printing technology, specifically relating to a magnetic stirring and re-suspending nozzle device. Background Technology

[0002] For bioprinting, the uniformity of the cell suspension is crucial to the quality of the printed structure. However, during the bioprinting process, cells will settle over time due to gravity exceeding buoyancy. After long-term storage or transportation, cells often settle at the bottom of the container, resulting in uneven distribution of cells in the suspension and affecting the printing quality.

[0003] To address the problem of cell sedimentation, researchers have developed various strategies to optimize cell suspension formulations. These include increasing the viscosity of the cell suspension to reduce sedimentation rates, or using specific cell suspension additives, such as particulate gels, to improve cell distribution and survival rates. While these approaches have solved the cell sedimentation problem, they have also limited the types of cell suspensions that can be used.

[0004] Mechanical stirring is a common method for resuspending cell suspensions. Its core principle is to break the aggregation of cells through physical force, allowing the cells to be evenly dispersed in the solution. Traditional mechanical stirring can only resuspend the cell suspension at the bottom layer. While increasing the stirring speed has a significant impact on the cell suspension state, excessively fast speeds can lead to higher shear forces, causing cell damage, while excessively slow speeds cannot achieve a good suspension effect.

[0005] Secondly, if conventional mechanical stirring or other methods are used to resuspend cell suspensions, a motor is used to drive a paddle to stir the cell suspension. However, the bearings on the motor and the paddle need to be in physical contact, which can easily cause friction and wear. The abrasive particles generated by the wear can enter the cell suspension and cause contamination, thus affecting the quality of bio-3D printing. In addition, the above structure is relatively complex and takes up a lot of space, so it cannot be used in smaller suspension tubes. Utility Model Content

[0006] To address the shortcomings of the prior art, this invention provides a magnetic stirring resuspension nozzle device, whose structure enables full resuspension of high liquid volumes, avoiding contamination of the cell suspension, and achieving remixing of the cell suspension during printing without interrupting the printing process.

[0007] The technical effects to be achieved by this utility model are realized through the following aspects:

[0008] This utility model provides a magnetic stirring re-suspending nozzle device, comprising:

[0009] A needle assembly includes a suspension tube and a housing, wherein the suspension tube is disposed within the housing, and the housing is provided with a vent, the vent being connected to the cavity of the suspension tube;

[0010] A nozzle is disposed at the other end of the needle assembly opposite to the air inlet, and the nozzle is connected to the cavity of the suspension tube;

[0011] A magnetic assembly is disposed on the housing near one end of the nozzle, and the suspension tube is at least partially located inside the magnetic assembly; and

[0012] A suspended rotor is disposed inside the suspension tube and opposite to the magnetic component, and is used to rotate and stir the liquid inside the suspension tube under the magnetic force of the magnetic component.

[0013] In some implementations, the suspended rotor includes a stirring structure and a magnetic structure, wherein the stirring structure and the magnetic structure are connected to form a rotor.

[0014] In some implementations, there are two stirring structures, and the magnetic structure is located between the two stirring structures and is arranged on the same axis of rotation as the two stirring structures.

[0015] In some implementations, the stirring structure is cross-shaped, and the two stirring structures are circumferentially staggered.

[0016] In some implementations, the outer surface of the suspended rotor is covered with a protective layer.

[0017] In some implementations, the needle assembly further includes a lifting device, which has a longitudinal pull rod and a guide rod. The pull rod is fixedly connected to the magnetic component, and the lifting device drives the pull rod to extend and retract so that the magnetic component slides up and down along the longitudinal guide rod.

[0018] In some implementations, the magnetic component includes a toroidal iron core and a plurality of magnetic coils, the toroidal iron core having mounting positions corresponding to the number of magnetic coils, and the magnetic coils being installed in the mounting positions.

[0019] In some implementations, each of the induction coils is arranged around the central circumference of the toroidal core, the magnetic coils are arranged radially opposite each other, and the distance between any two adjacent magnetic coils is equal.

[0020] In some implementations, one end of the suspension tube has an opening for pouring in cell suspension, the housing includes a cap that is sealed to the opening of the suspension tube, and the vent is located on the cap.

[0021] In some implementations, the cap includes a fixing block and a connector, one end of which is sealed to the opening of the suspension tube, the vent passes through the connector and communicates with the interior of the suspension tube, and the fixing block is used to fix the connector to the housing.

[0022] In summary, this utility model has at least the following advantages:

[0023] This invention provides a magnetic stirring and resuspension nozzle device. By incorporating a suspended rotor within the suspension tube of a needle assembly, the magnetic field of the magnetic component drives the rotation of the suspended rotor within the suspension tube, thereby stirring and mixing the cell suspension. The mixed cell suspension is then output through a nozzle. This suspended rotor can achieve rapid rotation through magnetic field changes, resulting in excellent mixing. Furthermore, the suspended rotor has a simple structure and small size, allowing it to be applied to suspension tubes of different sizes and reducing the possibility of cell suspension contamination. Attached Figure Description

[0024] Figure 1 This is an exploded schematic diagram of the magnetic stirring and re-suspending nozzle device of Embodiment 1 of this utility model.

[0025] Figure 2 This is a schematic diagram of the magnetic stirring and re-suspending nozzle device according to Embodiment 1 of this utility model.

[0026] Figure 3 This is a cross-sectional view of the magnetic stirring and re-suspending nozzle device structure in Embodiment 1 of this utility model.

[0027] Figure 4 This is a schematic diagram of the suspended rotor structure of Embodiment 2 of this utility model.

[0028] Figure 5 This is a schematic diagram of the explosion of the magnetic component in Embodiment 2 of this utility model.

[0029] Figure 6 This is a schematic diagram of the explosion of the shell and suspension tube in Embodiment 3 of this utility model.

[0030] Figure 7 This is a schematic diagram of the sealing explosion in Embodiment 3 of this utility model.

[0031] Figure 8 This is a schematic diagram of the shell structure of Embodiment 3 of this utility model.

[0032] Figure 9 This is a structural schematic diagram of another implementation of the magnetic stirring and re-suspending nozzle device in Embodiment 4 of this utility model.

[0033] Figure 10This is a front view schematic diagram of another implementation of the magnetic stirring and re-suspending nozzle device in Embodiment 4 of this utility model.

[0034] Figure 11 This is a structural cross-sectional schematic diagram of another implementation of the magnetic stirring re-suspending nozzle device in Embodiment 4 of this utility model.

[0035] Marked in the image:

[0036] 1. Nozzle; 2. Magnetic assembly; 21. Magnetic coil; 22. Ring core; 221. Mounting position; 3. Needle assembly; 31. Housing; 311. Cap; 3111. Connector; 3112. Fixing block; 312. Vent; 313. Window; 32. Suspension tube; 321. Opening; 33. Lifting device; 331. Pull rod; 332. Guide rod; 4. Suspended rotor; 41. Stirring structure; 42. Magnetic structure. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this utility model, not all embodiments.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] Please see the appendix Figure 1-3 The present invention provides a magnetic stirring and re-suspending nozzle device, comprising:

[0041] The needle assembly 3 includes a suspension tube 32 and a housing 31. The suspension tube 32 is disposed inside the housing 31, and the housing 31 has a vent 312 that connects to the cavity of the suspension tube 32. A nozzle 1 is disposed at the other end of the needle assembly 3 opposite to the vent 312 and connects to the cavity of the suspension tube 32. A magnetic component 2 is disposed on the housing 31 near the nozzle 1, and the suspension tube 32 is at least partially located inside the magnetic component 2. A suspension rotor 4 is disposed inside the suspension tube 32 and opposite to the magnetic component 2, and is used to rotate and stir the liquid inside the suspension tube 32 under the magnetic force of the magnetic component 2.

[0042] Specifically, the magnetic stirring and re-suspending nozzle device includes a needle assembly 3, a nozzle 1, and a magnetic assembly 2. The needle assembly 3 includes a housing 31 and a suspension tube 32. The suspension tube 32 has a columnar structure and is installed inside the housing 31. The top of the housing 31 is provided with a vent 312 that communicates with an external air pressure control mechanism. The vent 312 is connected to the suspension tube 32. The magnetic assembly 2 is installed on the outside of the bottom of the housing 31. The bottom of the suspension tube 32 extends to the inside of the magnetic assembly 2. A suspension rotor 4 is placed inside the suspension tube 32 and positioned at the bottom, so that the suspension rotor 4 inside the suspension tube 32 falls into the magnetic force range of the magnetic assembly 2. The nozzle 1 is located at the bottom of the housing 31 and is connected to the cavity of the suspension tube 32.

[0043] During use, the external air pressure control mechanism stops supplying air to the vent 312, so that the cell suspension in the suspension tube 32 no longer flows to the nozzle 1 and stops printing. The suspended rotor 4 in the suspension tube 32 is completely immersed in the liquid to be mixed. The magnetic component 2 is connected to an external alternating current to generate a changing magnetic field. The suspended rotor 4 rotates continuously under the action of the magnetic field. The rotation of the suspended rotor 4 stirs the cell suspension to be mixed, which is conducive to the diffusion of cells in the liquid to the surrounding area, thereby achieving the effect of liquid mixing.

[0044] In this embodiment, the suspension tube 32 is a columnar structure and is installed inside the housing 31. The two ends of the suspension tube 32 are connected to the vent 312 of the top housing 31 and the nozzle 1 at the bottom, respectively. A magnetic component 2 is set on the outer side of the housing 31 near the nozzle 1. The magnetic field generated by the alternating current in the magnetic component 2 causes the suspended rotor 4 inside the suspension tube 32 to rotate and stir the cell suspension under the action of the magnetic force. The cells located in the suspension tube 32 diffuse to the outside after being stirred, thereby achieving a uniform mixing effect of the cell suspension and solving the problem of cell suspension sedimentation that occurs during the printing process.

[0045] Example 2:

[0046] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the magnetic stirring re-suspending nozzle device of this utility model.

[0047] In some embodiments, the suspended rotor 4 includes a stirring structure 41 and a magnetic structure 42, wherein the stirring structure 41 and the magnetic structure 42 are connected to form a rotor.

[0048] Specifically, the suspended rotor 4 includes a stirring structure 41 for mixing the cell suspension and a magnetic structure 42 subjected to magnetic force. The stirring structure 41 and the magnetic structure 42 can be separate structures or integrally formed. The suspended rotor 4 is small in size and occupies little space within the suspension tube 32, allowing for the remixing of smaller amounts of cell suspension. It is also suitable for mixing in suspension tubes 32 of different sizes. The suspended rotor 4 can be cylindrical, olive-shaped, cross-shaped, or multi-toothed. The stirring structure 41 and the magnetic structure 42 are connected to form a stirring rotor. The magnetic structure 42 can be embedded within the stirring structure 41 or stacked for fixation, facilitating the mixing of the cell suspension. It is understood that the overall shape of the suspended rotor 4 and the connection relationship between the stirring structure 41 and the magnetic structure 42 can be determined according to actual conditions, and this application does not impose any limitations on them.

[0049] For further details, please see Figure 4 In this embodiment, there are two stirring structures 41, and a magnetic structure 42 is disposed between the two stirring structures 41 and is arranged on the same axis of rotation as the two stirring structures 41.

[0050] Specifically, the suspension rotor 4 is divided into two stirring structures 41, one above the other, and a magnetic structure 42 connecting the two stirring structures 41. The magnetic structure 42 is located between the two stirring structures 41, and all three are fixed on the same axis of rotation. In some embodiments, the stirring structure 41 is an iron sheet, and the magnetic structure 42 is a magnet. Under the influence of magnetic force, the magnetic structure 42 drives the stirring structure 41 to rotate, thereby stirring and mixing the cell suspension. The specific design of the stirring structure 41 can be determined according to the actual situation, as long as it can rotate and stir the cell suspension in the suspension tube 32 to achieve cell mixing.

[0051] To improve mixing efficiency, in some embodiments, such as Figure 4 As shown, the stirring structure 41 is in the shape of a cross, and the two stirring structures 41 are staggered circumferentially.

[0052] Specifically, two stirring structures 41 are set at the top and bottom of the magnetic structure 42. The two stirring structures 41 are identical and in a cross shape. They are staggered on the magnetic structure 42 along the circumference. The staggered angle can be selected but is not limited to 45°, so that the stirring structure 41 of the suspended rotor 4 can contact the cell suspension more fully and the mixing effect is better.

[0053] To prevent further contamination of the cell suspension, in some embodiments, the outer surface of the suspension rotor 4 is covered with a protective layer.

[0054] Specifically, the protective layer covering the outer surface of the suspending rotor 4 can be a polymer coating material to prevent the suspending rotor 4 itself from contaminating the cell suspension, thus increasing safety. In some embodiments, the outer surface of the suspending rotor 4 is covered with a layer of PTFE material, which has extremely low surface friction and excellent chemical stability, does not produce harmful substances, and is wear-resistant, thereby improving the service life and safety of the suspending rotor 4.

[0055] See Figure 5 The magnetic component 2 in this embodiment includes an annular iron core 22 and a plurality of magnetic coils 21. The annular iron core 22 is provided with a placement position 221 corresponding to the number of magnetic coils 21, and the magnetic coils 21 are installed in the placement position 221.

[0056] Specifically, the annular iron core 22 is embedded in the bottom of the housing 31. The bottom of the housing 31 accommodates a portion of the suspension tube 32 extending through the annular iron core 22. The annular iron core 22 is provided with multiple magnetic coils 21 corresponding to the number of magnetic poles on the magnetic structure 42. The annular iron core 22 is made of silicon steel sheets, which have high magnetic induction intensity. The silicon steel sheets are assembled in an up-and-down stacked direction to amplify the magnetic field and make the magnetic circuit more balanced. In another embodiment, the suspended rotor 4 has an up-and-down double cross stirring structure. The annular iron core 22 is provided with eight through-hole mounting positions 221, and each mounting position 221 is equipped with a magnetic coil 21. The magnetic coil 21 is electrically driven to generate a magnetic field, which exerts a magnetic force on the suspended rotor 4 in the suspension tube 32, causing it to rotate. The suspended rotor 4 rotates and stirs the cell suspension in the suspension tube 32, realizing the magnetic stirring and mixing effect of the device.

[0057] Furthermore, each induction coil is arranged around the central circumference of the toroidal iron core 22, and the magnetic induction coils 21 are arranged radially opposite each other, with each pair of adjacent magnetic induction coils 21 being equally spaced.

[0058] In this embodiment, the magnetic induction coil 21 is located in the circumferential direction of the levitation rotor 4, and adjacent magnetic induction coils 21 have opposite polarities.

[0059] Specifically, the suspended rotor 4 located inside the suspension tube 32 is at the center of the magnetic force of the magnetic coil 21. The adjacent coils have opposite polarities, and the suspended rotor 4 is in circumferential equilibrium. The magnetic field direction is changed alternately, causing the suspended rotor 4 to rotate under the magnetic force, thereby achieving the mixing of the cell suspension.

[0060] This invention relates to a magnetic stirring and resuspension nozzle device. The device includes a magnetic component 2 for magnetic stirring and a suspension rotor 4. The suspension rotor 4, located at the center of the magnetic force of the magnetic component 2, is in horizontal force equilibrium. Driving the magnetic component 2 changes the direction of the magnetic field, thus affecting the direction of the force on the suspension rotor 4. The suspension rotor 4 begins to rotate within the suspension tube. The rotating stirring structure 41 on the suspension rotor 4 causes the cells settled at the bottom of the cell suspension to diffuse throughout the liquid, thereby achieving homogenization of the cell suspension. The suspension rotor 4 is entirely encased in a protective layer for safety and rust prevention. The alternating magnetic field used to rotate and stir the suspension rotor 4 reduces the number of parts in direct contact with the cell suspension, avoiding the risk of contamination.

[0061] Example 3:

[0062] Please see Figure 6 The figure shows the cap structure of an embodiment of the present invention. One end of the suspension tube 32 has an opening 321 for pouring in cell suspension. The shell 31 includes a cap 311, which is sealed to the opening 321 of the suspension tube 32. A vent 312 is provided on the cap 311.

[0063] Specifically, an opening 321 is provided at the upper end of the suspension tube 32. Before printing, the prepared cell suspension needs to be poured into the cavity of the suspension tube 32 through the opening 321. The top of the shell 31 is designed as a cap 311. A vent 312 connected to an external air pressure control mechanism is provided on the cap 311. The vent 312 leads into the cavity of the suspension tube 32. The cap seals the opening 321 of the suspension tube 32 so that the device can pneumatically control the air pressure in the cavity of the suspension tube 32 to achieve printing. When performing the printing task, the external air pressure control mechanism supplies air to the vent 312. The pollution-free gas enters the cavity of the suspension tube 32 through the vent 312. The gas creates a pressure difference between the inside and outside. The gas pushes the cell suspension outward toward the nozzle 1. The nozzle 1 is provided with a microfluidic channel, which can accurately deposit the cell suspension onto the printing platform.

[0064] In some embodiments, please refer to Figure 7 The cover 311 includes a fixing block 3112 and a connector 3111. One end of the connector 3111 is sealed to the opening 321 of the suspension tube 32. The vent 312 passes through the connector 3111 and communicates with the interior of the suspension tube 32. The fixing block 3112 is used to fix the connector 3111 to the housing 31.

[0065] Specifically, the cap 311 includes a fixing block 3112 and a connector 3111. The connector 3111 is sealed to the top opening 321 of the suspension tube 32. The connecting portion may have an annular groove, within which a sealing ring adapted to the annular groove is placed. The sealing ring abuts against the annular groove and the top opening 321 of the suspension tube 32. Static friction between the sealing ring and the connector 3111 and the suspension tube 32 ensures a sealed fit at the opening 321. A vent 312 penetrates the connector 3111, allowing gas supplied by an external pneumatic control mechanism to enter the suspension tube 32 through the connector 3111. The fixing block 3112 is provided on the connector 3111, connecting the connector 3111 and the housing 31. This avoids the need for openings in the suspension tube 32, allowing it to connect to the housing 31 via the fixing block 3112. The fixing block 3112 simplifies the structure of the suspension tube 32, enabling convenient disassembly of the suspension tube 32.

[0066] The above-mentioned method of sealing the connection between the connector 3111 and the top opening 321 of the suspension tube 32 is only an example. In actual applications, other sealing connection methods can also be used to facilitate the mixing and use of the sealed suspension tube 32. This application does not limit this.

[0067] In addition, such as Figure 8 As shown, an observation window 313 is opened at the bottom of the housing 31 near the nozzle 1 to observe whether the cell suspension in the suspension tube 32 has sedimentation during the printing process. In addition, the suspension tube 32 is made of transparent material, making the observation more intuitive. It can also effectively judge whether the degree of mixing meets the printing requirements when magnetic stirring is performed.

[0068] The magnetic stirring re-suspension nozzle device of this utility model achieves the convenience of detaching the suspension tube 32 through the design of the fixing block 3112 and the connector 3111. It uses air pressure to drive the cell suspension into the nozzle 1 to perform printing, which improves the safety protection of the cell suspension. At the same time, the observation window 313 is opened on the shell 31 and the transparency of the suspension tube 32 is changed, so that the cell deposition can be observed and the degree of mixing of the cell suspension can be judged.

[0069] Example 4:

[0070] The difference between this embodiment and Embodiment 1 is that this embodiment is another implementation of the magnetic stirring re-suspending nozzle device of this utility model.

[0071] To achieve more thorough magnetic mixing, please refer to the appendix. Figure 9-11In another implementation, the needle assembly 3 also includes a lifting device 33, which is provided with a longitudinal pull rod 331 and a guide rod 332. The pull rod 331 is fixedly connected to the magnetic assembly 2. The lifting device 33 drives the pull rod 331 to extend and retract so that the magnetic assembly 2 can slide up and down along the longitudinal guide rod 332.

[0072] Specifically, a lifting device 33 is provided on the needle assembly 3. The lifting device 33 contains a drive mechanism, which can be, but is not limited to, an electric cylinder or a pneumatic cylinder. The drive mechanism is electrically connected to an external structure and can be precisely controlled by a program. The lifting device 33 has a longitudinal pull rod 331 and a guide rod 332. The pull rod 331, guide rod 332, and suspension tube 32 are arranged parallel to each other. One end of the pull rod 331 is fixedly engaged with the magnetic component 2, and the other end of the pull rod 331 is controlled by the drive mechanism to move up and down, thereby driving the magnetic component 2 to move up and down. This changes the spatial position of the magnetic force, allowing the suspended rotor 4 to move up and down not only at the bottom of the suspension tube 32, but also under the influence of the magnetic force, resulting in more thorough mixing and better homogenization of the cell suspension. One end of the guide rod 332 is fixed to the lifting device 33, and the other end passes through the magnetic component 2 and has a limiting structure at the end. The magnetic component 2 can slide up and down along the direction of the guide rod 332. Two pull rods 331 can be arranged opposite each other to balance the forces when the magnetic component 2 moves up and down.

[0073] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0074] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0075] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0076] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0077] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A magnetic stirring and re-suspending nozzle device, characterized in that, include: A needle assembly includes a suspension tube and a housing, wherein the suspension tube is disposed within the housing, and the housing is provided with a vent, the vent being connected to the cavity of the suspension tube; A nozzle is disposed at the other end of the needle assembly opposite to the air inlet, and the nozzle is connected to the cavity of the suspension tube; A magnetic assembly is disposed on the housing near one end of the nozzle, and the suspension tube is at least partially located inside the magnetic assembly; as well as A suspended rotor is disposed inside the suspension tube and opposite to the magnetic component, and is used to rotate and stir the liquid inside the suspension tube under the magnetic force of the magnetic component.

2. The magnetic stirring and re-suspending nozzle device according to claim 1, characterized in that, The suspended rotor includes a stirring structure and a magnetic structure, and the stirring structure and the magnetic structure are connected to form a rotor.

3. The magnetic stirring and re-suspending nozzle device according to claim 2, characterized in that, There are two stirring structures, and the magnetic structure is located between the two stirring structures and is arranged on the same axis of rotation as the two stirring structures.

4. The magnetic stirring and re-suspending nozzle device according to claim 3, characterized in that, The stirring structure is cross-shaped, and the two stirring structures are staggered circumferentially.

5. A magnetic stirring re-suspending nozzle device according to any one of claims 1-4, characterized in that, The outer surface of the suspended rotor is covered with a protective layer.

6. The magnetic stirring and re-suspending nozzle device according to claim 1, characterized in that, The needle assembly also includes a lifting device, which has a longitudinal pull rod and a guide rod. The pull rod is fixedly connected to the magnetic component. The lifting device drives the pull rod to extend and retract so that the magnetic component slides up and down along the longitudinal guide rod.

7. The magnetic stirring and re-suspending nozzle device according to claim 1, characterized in that, The magnetic component includes a toroidal iron core and a plurality of magnetic coils. The toroidal iron core has a mounting position corresponding to the number of magnetic coils, and the magnetic coils are installed in the mounting positions.

8. The magnetic stirring re-suspending nozzle device according to claim 7, characterized in that, Each of the induction coils is arranged around the central circumference of the annular iron core, and the magnetic coils are arranged radially opposite each other, with each pair of adjacent magnetic coils being equally spaced.

9. The magnetic stirring and re-suspending nozzle device according to claim 1, characterized in that, One end of the suspension tube has an opening for pouring in cell suspension. The shell includes a cap that is sealed to the opening of the suspension tube. The vent is located on the cap.

10. A magnetic stirring re-suspending nozzle device according to claim 9, characterized in that, The cap includes a fixing block and a connector. One end of the connector is sealed to the opening of the suspension tube. The vent passes through the connector and communicates with the interior of the suspension tube. The fixing block is used to fix the connector to the housing.

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