Centrifugal extraction device and control method thereof

Abstract

The invention provides a centrifugal extraction device and a control method thereof. The centrifugal extraction device comprises a driving device, a filtering container and a stop component arranged in the filtering container. The control method comprises the steps that in response to a received starting instruction, a driving device is controlled to drive a filtering container to rotate at a first rotating speed rule until a first preset condition is met, so that a powder target object between a stopping component and the bottom wall of the filtering container is attached to the circumferential side wall of the filtering container under the action of centrifugal force; and the driving device is controlled to drive the filtering container to rotate at a second rotating speed rule, so that the extracting agent entering the filtering container penetrates through the powder target object under the action of centrifugal force to form a target object solution and is thrown out of the filtering container. The second speed is greater than the first speed. Therefore, the powder target object can be extracted in a centrifugal extraction mode, the extraction agent can rapidly infiltrate, dissolve and penetrate through the powder target object under the action of centrifugal force, and the preparation time is shortened.

Description

Technical Field

[0001] This invention relates to the field of beverage extraction technology, and in particular to a centrifugal extraction device and its control method. Background Technology

[0002] In daily life, soluble powders such as coffee grounds are usually brewed with hot water to obtain a final drinking solution. However, with the increasing diversification of consumer demands, a cold brewing method for soluble powders like coffee has emerged. Taking cold brew coffee as an example, simply put, the cold brew method uses water at a lower temperature to steep coffee grounds for a longer period of time to obtain the final coffee liquid.

[0003] Because cold extraction uses low-temperature water, which is less effective at dissolving soluble powders than hot water, the process takes longer and increases waiting time. Summary of the Invention

[0004] One object of the present invention is to provide a centrifugal extraction apparatus and its control method that can solve any of the above problems.

[0005] In particular, the present invention provides a control method for a centrifugal extraction device, the centrifugal extraction device including a driving device and a filter container driven to rotate by the driving device, and a stop member disposed in the filter container;

[0006] The control method includes:

[0007] In response to receiving a start command, the drive device is controlled to drive the filter container to rotate regularly at a first speed until a first preset condition is met, so that the powder target between the stop member and the bottom wall of the filter container is attached to the circumferential side wall of the filter container under the action of centrifugal force.

[0008] The drive device is controlled to drive the filter container to rotate regularly at a second rotation speed, so that the extractant entering the filter container passes through the powder target under the action of centrifugal force to form a target solution and is thrown out of the filter container.

[0009] Optionally, the first rotation speed rule includes driving the filter container to rotate continuously or intermittently at the same rotation speed, or driving the filter container to rotate alternately at at least two rotation speeds; and / or, the first preset condition is that the filter container rotates at the first rotation speed rule for a first preset duration, so that the powder target object forms a ring tightly attached to the circumferential sidewall of the filter container under the action of centrifugal force, thereby allowing the powder target object to be uniformly passed through by the extractant.

[0010] Optionally, the step of controlling the drive device to drive the filter container to rotate regularly at a first rotational speed includes:

[0011] The drive device is controlled to drive the filter container to rotate regularly at a third speed until the second preset condition is reached, so that the powder target in the filter container is dispersed in the circumference of the filter container under the action of centrifugal force.

[0012] The rotational speed under the third rotational speed rule is less than the rotational speed under the first rotational speed rule.

[0013] Optionally, the third rotation speed rule includes driving the filter container to rotate continuously or intermittently at the same rotation speed, or driving the filter container to rotate alternately at at least two rotation speeds; and / or, the second preset condition is that the filter container has rotated for a second preset duration according to the third rotation speed rule.

[0014] Optionally, the centrifugal extraction apparatus further includes a liquid delivery device;

[0015] The control method further includes: in response to the first preset condition being met, controlling the liquid delivery device to deliver extractant to the filter container at a preset flow rate for a third preset duration.

[0016] Optionally, a gravity sensor is provided at the bottom of the filter container;

[0017] Prior to the step of controlling the liquid delivery device to deliver the extractant to the filter container at a preset flow rate for a third preset duration, the following steps are included:

[0018] Obtain the detection value of the gravity sensor, and determine the preset flow rate and / or the third preset duration based on the detection value.

[0019] Optionally, the centrifugal extraction apparatus further includes a force-applying device for applying a downward force to the stop member;

[0020] The control method further includes: before the step of controlling the driving device to drive the filter container to rotate regularly at a second rotation speed, controlling the force application device to apply force to the stop member.

[0021] Optionally, the stop member is made of a magnetically attractive material, and the force application device is an electromagnetic device;

[0022] The step of controlling the force-applying device to apply force to the stop member includes:

[0023] The current supplied to the electromagnetic device is controlled so that the electromagnetic device generates a magnetic field, thereby exerting a downward attractive force on the stop member.

[0024] Optionally, a gravity sensor is provided at the bottom of the filter container;

[0025] Prior to the step of controlling the force-applying device to apply force to the stop member, the following is included:

[0026] The detection value of the gravity sensor is obtained, and the force applied by the force application device to the stop member is determined based on the detection value.

[0027] In another aspect of the invention, a centrifugal extraction apparatus is also provided, which is the centrifugal extraction apparatus according to any of the above claims, comprising: a controller including a memory and a processor, wherein the memory stores a computer-executable program, which, when executed by the processor, implements the control method according to any of the above claims.

[0028] The centrifugal extraction apparatus and its control method of the present invention drive a filter container to rotate regularly at a first rotational speed until a first preset condition is met. This allows the powder target material between the stop member and the bottom wall of the filter container to adhere to the circumferential side wall of the filter container under the action of centrifugal force. Then, the drive device drives the filter container to rotate regularly at a second rotational speed, allowing the extractant entering the filter container to pass through the powder target material under the action of centrifugal force, forming a target material solution, which is then ejected from the filter container. In this way, centrifugal extraction can be used to extract the powder target material. The extractant can quickly wet, dissolve, and pass through the powder target material under the action of centrifugal force, effectively shortening the time for preparing the target material solution.

[0029] In addition, the stop member can compress the powder target, which not only helps the powder target maintain its shape during the rotation of the filter container, but also makes the powder target more compact, reducing the gap between powder particles. This allows the extractant to come into more sufficient contact with the powder target (because the larger the gap between powder particles, the less extractant will come into contact with the powder), thereby improving the solubility of the extractant in the powder target.

[0030] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0031] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0032] Figure 1 This is a schematic exploded view of a centrifugal extraction apparatus according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of a centrifugal extraction apparatus according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic cross-sectional view of a centrifugal extraction apparatus according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic cross-sectional view of the filter container and the outer filter cover in a centrifugal extraction apparatus according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the internal state of the extraction chamber during the use of a centrifugal extraction apparatus according to an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the outer filter cover in a centrifugal extraction apparatus according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic exploded view of the drive device in a centrifugal extraction apparatus according to an embodiment of the present invention;

[0039] Figure 8 This is a schematic exploded view of the storage solution in a centrifugal extraction apparatus according to an embodiment of the present invention;

[0040] Figure 9 This is a schematic block diagram of a controller for a centrifugal extraction apparatus according to an embodiment of the present invention;

[0041] Figure 10 This is a schematic flowchart of a control method for a centrifugal extraction apparatus according to an embodiment of the present invention;

[0042] Figure 11 This is a schematic flowchart of a control method for a centrifugal extraction apparatus according to another embodiment of the present invention;

[0043] Figure 12 This is a schematic flowchart of a control method for a centrifugal extraction apparatus according to yet another embodiment of the present invention;

[0044] Figure 13 This is a schematic flowchart of a control method for a centrifugal extraction apparatus according to an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Centrifugal extraction device; 20. Powdered target analyte;

[0047] 100. Outer shell;

[0048] 200. Liquid storage container; 201. Drain hole; 210. Inner cover; 211. Clearance hole; 220. Outer cover; 221. Motor shaft hole;

[0049] 300. Filter container; 301. Extraction chamber; 302. First filter hole;

[0050] 400. Stopping components;

[0051] 500. Drive unit; 510. Motor; 520. Connector; 521. Shaft connection part; 522. Adapter part;

[0052] 600. Outer filter cover; 601. Second filter hole;

[0053] 700. Controller; 710. Memory; 711. Computer-executable program; 720. Processor. Detailed Implementation

[0054] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0055] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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 the present invention.

[0056] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] The following text will first describe the configuration of the centrifugal extraction apparatus provided by the present invention with reference to the accompanying drawings; then, in conjunction with the centrifugal extraction apparatus described in the example, the control method provided by the present invention will be described in detail.

[0058] like Figures 1 to 3 As shown, in one embodiment, the centrifugal extraction apparatus 10 includes a housing 100, a liquid storage container 200, a filter container 300, a stop member 400, and a drive device 500. The liquid storage container 200, the filter container 300, the stop member 400, and the drive device 500 are all disposed inside the housing 100.

[0059] like Figures 1 to 3 As shown, the outer shell 100 is generally a cylindrical structure with an open top. The liquid storage container 200 is also generally a cylindrical structure with an open top. The height of the liquid storage container 200 is less than the height of the outer shell 100, and the outer diameter of the liquid storage container 200 is less than or equal to the inner diameter of the outer shell 100, so that the liquid storage container 200 is longitudinally assembled into the outer shell 100 through the opening at the top of the outer shell 100 with its opening facing upwards.

[0060] It should be noted that in some other embodiments, the outer shell and the liquid storage container can be open cylinders of other shapes, such as polygonal cylinders, elliptical cylinders, etc., or irregularly shaped cylinders.

[0061] like Figures 1 to 4 As shown, the filter container 300 is further disposed in the liquid storage container 200. The filter container 300 has an extraction chamber 301 for placing the powder target and a plurality of first filter holes 302 are provided on the peripheral sidewall.

[0062] Reference Figures 1 to 4 As shown, specifically, the filter container 300 is a container with an open top, which is the opening of the extraction chamber 301 of the filter container 300. The filter container 300 is assembled longitudinally in the liquid storage container 200 with the opening facing upwards. Therefore, the user can add the powdered target material into the extraction chamber 301 through the top opening.

[0063] like Figures 1 to 5 As shown, specifically, the stop member 400 is annular. The outer perimeter of the stop member 400 is adapted to the inner perimeter of the filter container 300, thereby allowing the stop member 400 to be coaxially positioned in the extraction chamber 301 of the filter container 300 through the top opening of the filter container 300. Because the stop member 400 is annular, the extractant can be added into the extraction chamber 301 through the through-hole in its center.

[0064] It should be noted that in some other embodiments, the stop member may also be a block with holes in a non-central position, in which case the extractant is added through the holes.

[0065] In other embodiments, the extractant can be added from the bottom of the filter container. Where the extractant can be added from the bottom of the filter container, the stop member can also be a block without any holes.

[0066] Combination Figures 1 to 5 As shown, the drive device 500 drives the filter container 300 to rotate, causing the powder target 20 between the stop member 400 and the bottom wall of the filter container 300 to adhere to the circumferential side wall of the filter container 300 under the action of centrifugal force. In this process, the stop member 400 restricts the height of the powder target 20, that is, it can apply pressure to the powder target 20 from the top.

[0067] Reference Figure 5 As shown by the flow direction arrow, the extractant added to the extraction chamber 301 passes through the powder target 20 under the action of centrifugal force, dissolves the powder target 20 to obtain the target solution, and then the target solution passes through the first filter hole 302 under the action of centrifugal force, so that the target solution is filtered for the first time.

[0068] It should be noted that the target powder includes one or more of coffee powder, tea powder, or milk tea powder, meaning that the target powder can be a single type of powder or a mixture of multiple powders.

[0069] Additionally, it should be noted that the extractant can be warm or cold water, and its composition can be pure water, tap water, mineral water, or water containing specific substances (such as sugar, milk, flavorings, etc.).

[0070] In this embodiment, the filter container 300 is driven to rotate by the drive device 500, and a stop member 400 is provided in the extraction chamber 301 of the filter container 300. This allows the powder target material placed in the extraction chamber 301 to adhere to the peripheral wall of the filter container 300 under the action of centrifugal force. Consequently, the extractant added to the extraction chamber 301 can pass through the powder target material adhered to the peripheral wall of the filter container 300 under the action of centrifugal force, thereby obtaining a target material solution after dissolving the powder target material. Furthermore, the stop member 400 can be used to limit the height of the powder target material 20, that is, to apply pressure to the powder target material 20 from the top, making the powder target material 20 more compact.

[0071] On the one hand, this embodiment creatively uses centrifugal extraction, using a drive device 500 to drive the filter container 300 to rotate, so that the powder target object is evenly spread on the peripheral wall of the filter container 300, and the extractant can quickly wet, dissolve and pass through the powder target object under the action of centrifugal force, effectively shortening the time for preparing the target object solution.

[0072] On the other hand, the stop member 400 can press the powder target object 20, which not only helps the powder target object 20 maintain its shape during the rotation of the filter container 300, but also makes the powder target object 20 more compact, reducing the gap between powder particles, thereby allowing the extractant to contact the powder target object more fully (because the larger the gap between powder particles, the less extractant will contact the powder), thereby improving the solubility of the extractant in the powder target object.

[0073] In addition, the annular stop member 400 also facilitates the addition of powdered target material or extractant into the extraction chamber 301 through the central through hole.

[0074] Reference Figures 1 to 4 As shown, the centrifugal extraction apparatus 10 also includes an outer filter cover 600. The outer filter cover 600 is disposed between the liquid storage container 200 and the filter container 300, and its peripheral sidewall is provided with a plurality of second filter holes 601.

[0075] Reference Figures 1 to 4 As shown, the outer filter cover 600 is a container with an open top, and it is longitudinally assembled within the liquid storage container 200 with the opening facing upwards. The filter container 300 is disposed within the outer filter cover 600, meaning the outer filter cover 600 is positioned between the liquid storage container 200 and the filter container 300. Simultaneously, the peripheral sidewall of the outer filter cover 600 surrounds the peripheral sidewall of the filter container 300. The peripheral sidewall of the outer filter cover 600 is provided with a plurality of second filter holes 601.

[0076] Continue to refer to Figures 1 to 4 As shown, after the target solution passes through the first filter hole 302 under centrifugal force, it is thrown onto the peripheral wall of the outer filter cover 600 and then passes through the outer filter cover 600, thus achieving a second filtration. The target solution, after being filtered twice by the filter container 300 and the outer filter cover 600, enters the storage container 200.

[0077] Those skilled in the art will understand that by providing an outer filter cover 600 between the liquid storage container 200 and the filter container 300, the target solution ejected from the filter container 300 can be filtered again by the outer filter cover 600. In other words, the target solution can undergo dual filtration by the filter container 300 and the outer filter cover 600, thereby effectively reducing undissolved powder particles in the final target solution for user consumption and helping to improve the taste of the target solution.

[0078] It should be noted that in some other embodiments, the filter container may include filter paper, which is attached to the inner or outer peripheral wall of the filter container to improve the filtration effect. Similarly, the outer filter cover may also include filter paper, which is attached to the inner or outer peripheral wall of the outer filter cover.

[0079] It should be noted that in some other embodiments, the outer filter cover may also be an annular structure, that is, it only has a peripheral sidewall portion surrounding the filter container, but no bottom sidewall.

[0080] like Figures 1 to 4 As shown, in one embodiment, the peripheral sidewall of the outer filter cover 600 is inclined upward along its own radial direction to form a funnel shape. That is, the outer filter cover 600 is in the shape of an inverted frustum. In other words, the space enclosed by the peripheral sidewall of the outer filter cover 600 increases in diameter from bottom to top.

[0081] Those skilled in the art will understand that by setting the peripheral sidewall of the outer filter 600 to be radially inclined upwards, when the target solution collides with the outer filter 600 under centrifugal force, due to the kinetic energy of the soluble target solution, the target solution will first diffuse along the inclined direction of the outer filter 600 before passing through it. This not only achieves dual filtration and improves the filtration effect, but also helps to increase the effective filtration area of ​​the outer filter 600, preventing the solution from always concentrating in an excessively small area of ​​the outer filter 600 and causing blockage.

[0082] In addition, when the outer filter cover 600 is equipped with filter paper, the inclined circumferential sidewall of the outer filter cover 600 can also buffer the target solution, preventing the target solution from having too great an impact force that could cause it to break through the filter paper of the outer filter cover 600.

[0083] like Figures 1 to 4 ,as well as Figure 6 As shown, in one embodiment, the inclination angle of the peripheral sidewall of the outer filter cover 600 is set to any value between 30 degrees and 60 degrees. The inclination angle of the peripheral sidewall of the outer filter cover 600 is the angle between the peripheral sidewall of the outer filter cover 600 and the horizontal plane, as shown in the figure. Figure 6 Angle 'a' in the context. For example, the tilt angle of the peripheral sidewall of the outer filter shroud 600 can be set to 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, or 60 degrees.

[0084] Those skilled in the art will understand that by setting the inclination angle of the peripheral sidewall of the outer filter cover 600 to any value between 30 degrees and 60 degrees, the inclination of the outer filter cover 600 is not too steep, thereby ensuring that the target solution can have a good diffusion effect on the outer filter cover 600. Furthermore, the inclination of the outer filter cover 600 is not too gentle, to avoid the outer filter cover 600 having an excessively large diameter, resulting in an unattractive appearance, and to avoid the outer filter cover 600 being too far from the filter container 300, causing the target solution to have too little kinetic energy upon reaching the outer filter cover 600, thus affecting the diffusion effect.

[0085] like Figures 1 to 4 ,as well as Figure 6 As shown, preferably, the inclination angle of the peripheral sidewall of the outer filter cover 600 is set to any value between 40 degrees and 50 degrees, for example, it can be set to 40 degrees, 42 degrees, 44 degrees, 45 degrees, 46 degrees, 49 degrees or 50 degrees. More preferably, the inclination angle of the peripheral sidewall of the outer filter cover 600 is set to 45 degrees.

[0086] Those skilled in the art will understand that by setting the tilt angle of the peripheral sidewall of the outer filter cover 600 to any value between 40 and 50 degrees, the tilt angle of the peripheral sidewall of the outer filter cover 600 is more suitable in terms of tilt, which can not only ensure that the target solution has a better diffusion effect on the outer filter cover 600, but also make the overall shape of the outer filter cover 600 more aesthetically pleasing.

[0087] like Figure 1 and Figure 3 As shown, in some embodiments, the bottom surface of the stop member 400 is lower than the top surface of the outer filter cover 600 to prevent the target solution from being thrown out or splashed out of the outer filter cover 600.

[0088] like Figures 1 to 4 As shown, in some embodiments, a portion of the plurality of second filter holes 601 are located above the bottom surface of the stop member 400 and a portion are located below the bottom surface of the stop member 400. Specifically, the portion of the outer filter cover 600 above the bottom surface of the stop member 400 is provided with second filter holes 601, and the portion below the bottom surface of the stop member 400 is also provided with second filter holes 601.

[0089] Those skilled in the art will understand that by positioning a portion of the plurality of second filter holes 601 above the bottom surface of the stop member 400 and a portion below the bottom surface of the stop member 400, the portion of the outer filter cover 600 above the bottom surface of the stop member 400 can also serve a filtering effect while preventing the target solution from being thrown out or splashed out of the outer filter cover 600. This allows the target solution near the bottom surface of the stop member 400 in the extraction chamber 301 to be thrown onto the outer filter cover 600, and after diffusing upward along the outer filter cover 600, it can still be filtered by the portion of the outer filter cover 600 above the bottom surface of the stop member 400.

[0090] like Figure 3 and Figure 5 As shown, in one embodiment, the bottom surface of the stop member 400 is inclined downward along its own radial direction to form a conical surface, so that the powder target object that hits the conical surface under the action of centrifugal force generates a downward and pointing motion component towards the peripheral wall of the filter container 300, so that the powder target object attached to the peripheral wall of the filter container 300 is more compact.

[0091] Those skilled in the art will understand that by forming a conical surface by arranging the bottom surface of the stop member 400 to be radially inclined downwards, when the powder target material collides with the bottom surface of the stop member 400 under the action of centrifugal force, the force is decomposed into two directions: transverse and longitudinal. This results in the powder target material having motion components in both the downward and direction towards the peripheral wall of the filter container 300. Therefore, macroscopically speaking, while the powder target material continuously adheres to the peripheral wall of the filter container 300, the top of the already adhered powder target material is subjected to downward pressure from the powder target material whose direction has changed due to colliding with the bottom surface of the stop member 400. This makes the powder target material more compact in the axial direction, further reducing the gap between powder particles, thereby allowing for more thorough contact between the extractant and the powder target material.

[0092] Furthermore, the aforementioned structure makes the edge of the stop member 400 thicker than the center, thereby increasing the weight of the stop member 400 radially outwards. This helps to improve the stability of the contact between the stop member 400 and the filter container 300, thus improving its stability during rotation.

[0093] like Figure 3 and Figure 5 As shown, in one embodiment, with the stop member 400 being annular, the top surface of the stop member 400 is inclined upwards along its own radial direction to form a funnel surface, so that the powdered target material and / or extractant added from the outside converges into the through hole of the stop member 400. Specifically, the diameter of the funnel surface gradually decreases from top to bottom.

[0094] Those skilled in the art will understand that by setting the top surface of the stop member 400 to be inclined upward along its own radial direction to form a funnel surface, during the process of adding powdered target material or extractant into the extraction chamber 301 through the middle through hole of the stop member 400, even if the powdered target material or extractant does not align with the through hole and falls on the top surface of the stop member 400, i.e. the funnel surface, it can still converge along the funnel surface to the through hole and then fall into the extraction chamber 301, thereby making the process of adding powdered target material or extractant more convenient.

[0095] like Figures 1 to 3 As shown, in one embodiment, the outer filter cover 600 is coaxially fixed with the filter container 300 so as to rotate synchronously with the filter container 300.

[0096] Reference Figures 1 to 3 As shown, specifically, the drive unit 500 includes a motor 510 and a connector 520. The motor 510 is fixedly connected to the outer casing 100 via its housing, and the motor 510 is fixedly connected to the connector 520 via its shaft. The connector 520 is directly or indirectly fixedly connected to the filter container 300 so that the motor 510 drives the filter container 300 to rotate via the connector 520.

[0097] like Figures 1 to 3 ,as well as Figure 7 As shown, specifically, connector 520 includes a shaft connection portion 521 and an adapter portion 522. The shaft connection portion 521 is used to connect to the shaft of motor 510, and the adapter portion 522 is used to directly or indirectly fixably connect to filter container 300. The shaft connection portion 521 is generally cylindrical, and the adapter portion 522 is generally frustum-shaped. The adapter portion 522 is a cylindrical portion with an opening at the bottom, and the top end of the cylindrical portion extends circumferentially beyond the outer sidewall to form a mating platform. The adapter portion 522 covers the shaft connection portion 521 and is fixedly connected to it.

[0098] It should be noted that in some other embodiments, the shaft connection can be any feasible structure such as a plate-shaped structure, column-shaped structure, Y-shaped structure, or triangular structure. The shaft connection is provided with a shaft hole (not marked in the figure) that matches the motor shaft, so as to achieve a fixed connection between the shaft connection and the motor shaft. Alternatively, the shaft connection is provided with a connecting shaft, which is fixedly connected to the motor shaft by a coupling.

[0099] Alternatively, those skilled in the art can connect the shaft connection to the motor shaft using any other feasible connection method, such as welding, bolting, or flange connection, as needed.

[0100] like Figures 1 to 3 ,as well as Figure 7As shown, furthermore, the top surface of the adapter 522 (that is, the top surface of the docking platform) is fixedly connected to the outer surface of the bottom wall of the outer filter cover 600, and the inner surface of the bottom wall of the outer filter cover 600 is fitted and fixedly attached to the outer surface of the bottom wall of the filter container 300. In other words, the connector 520 is indirectly and fixedly connected to the filter container 300 via the outer filter cover 600. In this way, the filter container 300, the outer filter cover 600, the connector 520, and the rotating shaft of the motor 510 are fixed together. After the motor 510 is started, the filter container 300, the outer filter cover 600, and the connector 520 rotate synchronously under the drive of the rotating shaft.

[0101] It should be noted that the inner surface of the bottom wall of the outer filter cover 600 is roughly the same in shape and size as the outer surface of the bottom wall of the filter container 300, thereby avoiding the accumulation of too much target solution between the outer filter cover 600 and the filter container 300.

[0102] It should be noted that in some other embodiments, the outer filter cover may only surround the peripheral sidewall of the filter container, so that the connector can be directly fixedly connected to the outer surface of the bottom wall of the filter container, and the outer filter cover may also be fixedly connected to the connector separately. Alternatively, the bottom end of the outer filter cover may match the bottom diameter of the filter container, and the bottom end of the outer filter cover may be fixedly connected to the bottom end of the filter container.

[0103] like Figures 1 to 3 ,as well as Figures 7 to 8 As shown, the liquid storage container 200 includes an inner casing 210 and an outer casing 220. Both the inner casing 210 and the outer casing 220 are cylindrical and open at the top. The inner casing 210 is disposed inside the outer casing 220, such that the outer casing 220 fits over the inner casing 210. The filter container 300 and the outer filter cover 600 are disposed inside the inner casing 210.

[0104] Reference Figure 3 , Figure 7 and Figure 8 As shown, further, the bottom wall of the inner cover 210 has a clearance hole 211, and the inner bottom wall has a support rib that protrudes upward around the clearance hole 211. The diameter of the clearance hole 211 is larger than the outer diameter of the cylindrical portion of the transition part 522, and smaller than the diameter of the docking platform of the transition part 522, so that the cylindrical portion of the transition part 522 can be inserted into the area enclosed by the support rib from above, and the support rib supports the bottom surface of the docking platform of the transition part 522. The outer edge of the docking platform of the transition part 522 has a downwardly extending flange that surrounds the outer periphery of the support rib.

[0105] Reference Figure 3 , Figure 7 and Figure 8As shown, the bottom wall of the outer casing 220 has a motor shaft hole 221 for the motor shaft 510 to pass through. Specifically, in one assembly process, the adapter 522 and the shaft connection 521 are first connected together, then the cylindrical part of the adapter 522 is placed from the top of the inner casing 210 into the area surrounded by the support rib, and then the motor shaft 510 is connected to the shaft connection 521 through the motor shaft hole 221.

[0106] Those skilled in the art will understand that by fixing the outer filter cover 600 coaxially with the filter container 300, the outer filter cover 600 and the filter container 300 can rotate synchronously, allowing the target solution to continue to be subjected to centrifugal force in the outer filter cover 600. This helps the target solution to further diffuse in the outer filter cover 600, further increasing the effective filtration area of ​​the outer filter cover 600, and also helps the target solution to pass through the outer filter cover 600 better, thereby improving the filtration effect and reducing the accumulation of the target solution between the filter container 300 and the outer filter cover 600.

[0107] In addition, by attaching and fixing the inner surface of the bottom wall of the outer filter cover 600 to the outer surface of the bottom wall of the filter container 300, a larger contact area is achieved between the outer filter cover 600 and the filter container 300, thereby making the fixation between the outer filter cover 600 and the filter container 300 more stable, which in turn helps to improve the stability of the synchronous rotation of the outer filter cover 600 and the filter container 300.

[0108] It should be noted that in some other embodiments, the outer filter cover may rotate asynchronously with the filter container, or the outer filter cover may be fixed in place, that is, it may not rotate.

[0109] In addition, by using motor 510 to drive the filter container 300 to rotate, there is no need to change the mode of motion, making the structure simpler.

[0110] It should be noted that in some other embodiments, the reciprocating motion of the piston device can be converted into rotational motion, thereby driving the filter container to rotate.

[0111] In addition, by setting up connector 520, the filter container 300 is rotated by connector 520. Compared with the rotating shaft of motor 510, connector 520 can provide a larger connection surface, thereby improving the structural stability between drive device 500 and filter container 300, making the rotation of filter container 300 more stable.

[0112] It should be noted that in some other embodiments, the motor shaft can be directly or indirectly fixedly connected to the filter container.

[0113] Reference Figures 3 to 4As shown, in one embodiment, the height of the filter container 300 is greater than the height of the outer filter cover 600. That is, after the inner surface of the bottom wall of the outer filter cover 600 is attached and fixed to the outer surface of the bottom wall of the filter container 300, the top of the filter container 300 is higher than the top of the outer filter cover 600. This arrangement facilitates the removal of the filter container 300 and the outer filter cover 600 as a whole by applying force to the top of the filter container 300.

[0114] like Figures 1 to 3 ,as well as Figure 8 As shown, the liquid storage container 200 is also provided with a drain hole 201 so that the target solution in the liquid storage container 200 can be discharged to the outside through the drain hole 201 for the user to take, making it more convenient to take the target solution.

[0115] It should be noted that in some other embodiments, the drain hole may be equipped with an openable and closable valve. When the valve is open, the target solution flows out from the drain hole; when the valve is closed, the target solution cannot flow out from the drain hole.

[0116] It should be noted that in some other embodiments, the liquid storage container may not have a drain hole, and the target solution in the liquid storage cavity can be poured out directly.

[0117] Reference Figures 1 to 4 As shown, the radial cross-sections of the filter container 300 and the outer filter cover 600 perpendicular to their own axial direction are circular to improve the dynamic balance of the filter container 300 and the outer filter cover 600 when they rotate, so that the filter container 300 and the outer filter cover 600 have good rotational performance when they rotate.

[0118] It should be noted that in some other embodiments, the radial cross-section of the filter container and the outer filter cover perpendicular to their own axis can also be other shapes, such as plum blossom shape, polygon (e.g., hexagon, octagon, dodecagon, etc.), rectangle, etc.

[0119] like Figure 9 As shown, the centrifugal extraction apparatus in any of the foregoing embodiments of the present invention further includes a controller 700, which includes a memory 710 and a processor 720. The memory 710 stores a computer-executable program 711, which, when executed by the processor 720, can implement the control method described in any of the following embodiments.

[0120] The memory 710 may include main memory and non-volatile memory, and provides computer programs and data to the processor 720. For example, the main memory may be high-speed random-access memory (RAM), and the non-volatile memory may be at least one disk storage device.

[0121] The processor 720 is an integrated circuit chip with the ability to process signals. The processor 720 can be a general-purpose processor, such as a Central Processing Unit (CPU), Network Processor (NP), Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, microprocessors, and any other conventional processor.

[0122] It should be noted that the drawing numbers mentioned in the embodiments of the control method described below refer to... Figures 1 to 8 As shown.

[0123] like Figure 10 As shown, in one embodiment, the control method of the centrifugal extraction device 10 includes:

[0124] In step S110, in response to receiving the start command, the control drive device 500 drives the filter container 300 to rotate regularly at a first speed until the first preset condition is met, so that the powder target between the stop member 400 and the bottom wall of the filter container 300 is attached to the circumferential side wall of the filter container 300 under the action of centrifugal force.

[0125] Specifically, the start command mentioned in this step can be a start signal generated by the user operating the start button on the centrifugal extraction device 10; or it can be a start signal sent by the user to the centrifugal extraction device 10 via a mobile phone or other wireless control device.

[0126] Those skilled in the art will understand that before starting the centrifugal extraction device 10, the required powder target material needs to be added into the filter container 300. To facilitate the user adding a sufficient amount of powder target material into the filter container 300, a measuring cup or spoon can be provided to the centrifugal extraction device 10 to measure the amount of powder target material added into the filter container 300. Alternatively, a weighing sensor can be provided to the centrifugal extraction device 10 to determine whether there is enough powder target material in the filter container 300 by weighing.

[0127] In step S110, by rotating the filter container 300 at a first rotational speed to meet a first preset condition, the powder target material between the stop member 400 and the bottom wall of the filter container 300 is designed to form a ring tightly adhering to the circumferential side wall of the filter container 300 under the action of centrifugal force, thereby allowing the extractant to pass through the powder target material uniformly. This ring shape ensures that the thickness of the powder target material in the circumferential direction of the filter container 300 is as uniform as possible, thus ensuring that the extraction effect of each part of the powder target material is basically consistent, avoiding the situation where a part of the powder target material is too thick and affects the penetration effect of the extractant, thus failing to be fully extracted.

[0128] To achieve the above objectives, in some embodiments, the first rotational speed rule may be to drive the filter container 300 to rotate continuously or intermittently at the same rotational speed. The rotational speed can be any value selected from 2000 rpm to 4000 rpm. For example, it can be 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, 4000 rpm, etc. Furthermore, in the intermittent rotation mode, the interval duration can be any feasible duration such as 1 second, 3 seconds, 5 seconds, 10 seconds, 30 seconds, etc.

[0129] In some other embodiments, the first rotational speed rule may also be to drive the filter container 300 to rotate alternately at at least two rotational speeds. For example, the at least two rotational speeds are denoted as v1, v2, ..., vn. Within the same cycle, the duration corresponding to each rotational speed is denoted as t1, t2, ..., tn. Here, v1, v2, ..., vn can each be any value selected from 2000 rpm to 4000 rpm, for example, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, 4000 rpm, etc. t1, t2, ..., tn can each be any feasible duration such as 1 second, 3 seconds, 5 seconds, 10 seconds, 30 seconds, etc.

[0130] The first preset condition described in step S110 is that the filter container 300 rotates at a first rotation speed for a first preset duration. This first preset duration can be any duration capable of achieving the above objective, for example, any value selected from 0.5 minutes to 3 minutes. For example, the first preset duration can be 0.5 minutes, 1 minute, 1.5 minutes, 2 minutes, 2.2 minutes, 3 minutes, etc.

[0131] In step S120, the control drive device 500 drives the filter container 300 to rotate regularly at the second speed, so that the extractant entering the filter container 300 passes through the powder target object under the action of centrifugal force to form a target object solution and is thrown out of the filter container 300.

[0132] After the first preset condition is met, that is, after the powder target object forms a ring shape in the extraction chamber 301, the control drive device 500 drives the filter container 300 to rotate regularly at the second speed. This is intended to ensure that the extractant added to the filter container 300 has a sufficiently large impact force when passing through the powder target object under the action of centrifugal force, so as to quickly wet, dissolve and pass through the powder target object, effectively shortening the time for preparing the target object solution.

[0133] To achieve the above objective, the second rotational speed rule can be a specific rotational speed value that causes the filter container 300 to rotate continuously, such as any value selected from 3500 rpm to 6000 rpm. For example, the second rotational speed can be 3500 rpm, 4000 rpm, 4500 rpm, 5000 rpm, 6000 rpm, etc. The second rotational speed rule can also be, as described above for the first rotational speed rule, include driving the filter container 300 to rotate intermittently at the same rotational speed, or driving the filter container 300 to rotate alternately at at least two rotational speeds.

[0134] In this embodiment, by controlling the drive device 500 to drive the filter container 300 to rotate regularly at a first speed until a first preset condition is met, the powder target material between the stop member 400 and the bottom wall of the filter container 300 can be attached to the circumferential side wall of the filter container 300 under the action of centrifugal force. Then, the drive device 500 is controlled to drive the filter container 300 to rotate regularly at a second speed, and the extractant entering the filter container 300 passes through the powder target material under the action of centrifugal force to form a target material solution and is then ejected from the filter container 300. In this way, the extraction of the powder target material can be achieved by centrifugal extraction. Under the action of centrifugal force, the extractant can quickly wet, dissolve and pass through the powder target material, effectively shortening the time for preparing the target material solution.

[0135] In addition, the stop member 400 can compress the powder target, which not only helps the powder target to maintain its shape during the rotation of the filter container 300, but also makes the powder target more compact, reducing the gap between powder particles, thereby allowing the extractant to contact the powder target more fully (because the larger the gap between powder particles, the less extractant will contact the powder), and thus improving the solubility of the extractant in the powder target.

[0136] like Figure 11As shown, in one embodiment, unlike the previous embodiments, before the step of controlling the drive device 500 to drive the filter container 300 to rotate at a first speed, the method includes: controlling the drive device 500 to drive the filter container 300 to rotate at a third speed until a second preset condition is reached, so that the powder target material in the filter container 300 is dispersed circumferentially in the filter container 300 under the action of centrifugal force. The speed under the third speed rule is lower than the speed under the first speed rule.

[0137] Specifically, the control method of the centrifugal extraction device 10 in this embodiment includes:

[0138] In step S210, in response to receiving the start command, the control drive device 500 drives the filter container 300 to rotate regularly at a third speed until the second preset condition is reached.

[0139] In this step, after the centrifugal extraction device is started, the drive device 500 is first controlled to drive the filter container 300 to rotate regularly at a lower third speed. This is intended to initially disperse the powder target in the extraction chamber 301 in the circumferential direction of the filter container 300, thereby making the powder target more even in the filter container 300. In this way, during the regular rotation of the filter container 300 at the first speed, the powder target can be more evenly distributed on the circumferential sidewall of the filter container 300, that is, the thickness of the powder target in the circumferential direction of the filter container 300 is more uniform, which helps to improve the subsequent extraction effect.

[0140] To achieve the above objectives, in some embodiments, the third rotational speed rule can be to drive the filter container 300 to rotate continuously, intermittently, or reciprocally at the same rotational speed. The rotational speed can be any value selected from 300 rpm to 600 rpm. For example, the rotational speed can be 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, 600 rpm, etc. Furthermore, in the intermittent rotation mode, the interval duration can be any feasible duration such as 1 second, 3 seconds, 5 seconds, 10 seconds, 30 seconds, etc. In the reciprocating rotation mode, the duration of one reciprocating cycle can be any feasible duration such as 10 seconds, 20 seconds, 30 seconds, 1 minute, etc.

[0141] In other embodiments, the third rotational speed rule may also be to drive the filter container 300 to rotate alternately at at least two rotational speeds. Exemplarily, the at least two rotational speeds are denoted as V1, V2…Vn. Within the same cycle, the duration corresponding to each rotational speed is denoted as T1, T2…Tn. Wherein, V1, V2…Vn can each be any value selected from 300 rpm to 600 rpm, for example, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500 rpm, 550 rpm, 600 rpm, etc. T1, T2…Tn can each be any feasible duration such as 1 second, 3 seconds, 5 seconds, 10 seconds, 30 seconds, etc.

[0142] The second preset condition described in step S210 is that the filter container 300 rotates at a third rotation speed for a second preset duration. This second preset duration can be any duration capable of achieving the above objective, for example, any value selected from 0.5 minutes to 3 minutes. For example, the first preset duration can be 0.5 minutes, 1 minute, 1.5 minutes, 2 minutes, 2.2 minutes, 3 minutes, etc.

[0143] In step S220, the control drive device 500 drives the filter container 300 to rotate regularly at a first speed until the first preset condition is met, so that the powder target between the stop member 400 and the bottom wall of the filter container 300 is attached to the circumferential side wall of the filter container 300 under the action of centrifugal force.

[0144] After the second preset condition is met, that is, after the powder target material is initially dispersed in the extraction chamber 301, the control drive device 500 drives the filter container 300 to rotate regularly at the first rotation speed. The specific details of this step are as described in the previous embodiment and will not be repeated here.

[0145] In step S230, the control drive device 500 drives the filter container 300 to rotate regularly at a second rotation speed, so that the extractant entering the filter container 300 passes through the powdered target material under the action of centrifugal force to form a target material solution and is thrown out of the filter container 300. The specific content of this step is the same as described in the previous embodiment, and will not be repeated here.

[0146] like Figure 12 As shown, in one embodiment, unlike the previous embodiments, the centrifugal extraction apparatus further includes a liquid delivery device; the control method further includes: in response to satisfying a first preset condition, controlling the liquid delivery device to deliver extractant to the filter container at a preset flow rate for a third preset time.

[0147] Specifically, the control method of the centrifugal extraction device in this embodiment includes:

[0148] In step S310, in response to the fulfillment of the first preset condition, the liquid delivery device is controlled to deliver the extractant to the filter container at a preset flow rate for a third preset duration.

[0149] For example, the preset flow rate can be any value selected from 0.025 liters / minute to 2 liters / minute, such as 0.025 liters / minute, 0.05 liters / minute, 0.1 liters / minute, 0.3 liters / minute, 0.5 liters / minute, 0.8 liters / minute, 1 liter / minute, 1.3 liters / minute, 1.7 liters / minute, 2 liters / minute, etc.

[0150] For example, the third preset duration can be any duration selected from 0.5 minutes to 4 minutes, such as 0.5 minutes, 1 minute, 1.5 minutes, 2 minutes, 2.2 minutes, 3 minutes, etc.

[0151] In some embodiments, a gravity sensor is provided at the bottom of the filter container; prior to step S310, the method includes: acquiring the detection value of the gravity sensor, and determining a preset flow rate and / or a third preset duration based on the detection value. Specifically, the gravity sensor can detect the weight of the powder target material placed in the filter container, thereby determining the rate and / or time of adding the extractant based on the weight of the powder target material. In this way, the centrifugal extraction device can automatically select an appropriate extraction dosage based on the weight of the powder target material in the filter container, thereby helping to ensure a better extraction effect.

[0152] For example, the detection value of the gravity sensor and the total extraction dose are directly proportional to a preset ratio, such as making the detection value of the gravity sensor (i.e., the weight of the powder target object in grams) to the total extraction dose (in milliliters) satisfy a ratio of 1 to 5. Thus, the required preset flow rate and / or third preset duration can be determined based on the total extraction dose.

[0153] Alternatively, appropriate extraction doses for various common powder target substances in different quantities can be determined based on experience and entered into the controller's memory. This allows the processor to search for the appropriate dose based on the gravity sensor's detection value when executing a computer-executable program. In other words, the centrifugal extraction device has pre-built-in correspondences between the detection values ​​of various gravity sensors and preset flow rates and / or a third preset duration.

[0154] Specifically, the preset flow rate can be determined by setting a third preset duration based solely on the detection value of the gravity sensor; the third preset duration can be determined by setting a preset flow rate based solely on the detection value of the gravity sensor; or both the preset flow rate and the third preset duration can be determined based on the detection value of the gravity sensor.

[0155] Step S320: Control the drive device to drive the filter container to rotate regularly at the second rotation speed. The specific details of this step are as described in the previous embodiment and will not be repeated here.

[0156] It should be noted that steps S310 and S320 can be performed simultaneously, or step S320 can be performed after step S310 is completed.

[0157] like Figure 13 As shown, in one embodiment, unlike the previous embodiments, the centrifugal extraction apparatus further includes a force-applying device for applying a downward force to the stop member; the control method further includes: controlling the force-applying device to apply force to the stop member before the step of controlling the drive device to drive the filter container to rotate regularly at a second speed.

[0158] Reference Figure 13 As shown, the control method of the centrifugal extraction device in this embodiment includes:

[0159] In step S410, in response to receiving the start command, the drive device is controlled to drive the filter container to rotate regularly at a first speed until a first preset condition is met, so that the powder target between the stop member and the bottom wall of the filter container adheres to the circumferential side wall of the filter container under the action of centrifugal force. The specific content of this step is as described in the previous embodiment and will not be repeated here.

[0160] Step S420: Control the force application device to apply force to the stop member.

[0161] In one embodiment, for example, the stop member is made of a magnetically attractive material, and the force-applying device is an electromagnetic device. Step S420 includes controlling the current flowing to the electromagnetic device to generate a magnetic field, thereby exerting a downward attractive force on the stop member. Specifically, the electromagnetic device can be disposed on the bottom wall of the liquid storage container. When energized, the electromagnetic device generates a magnetic field that attracts the stop member, thus subjecting it to a downward force. Furthermore, the stop member can move longitudinally relative to the filter container.

[0162] In this step, by controlling the force application device to apply force to the stop member, the stop member is pressed downwards and adheres tightly to the circumferential sidewall of the filter container, making the ring formed by the powder target more compact. This helps to improve the dissolution effect of the extractant on the powder target.

[0163] In some embodiments, a gravity sensor is provided at the bottom of the filter container. Prior to the step of controlling the force-applying device to apply force to the stop member, the method includes: acquiring the detection value of the gravity sensor, and determining the magnitude of the force applied by the force-applying device to the stop member based on the detection value. In the case where the force-applying device is an electromagnetic device, this means determining the magnitude of the energizing current.

[0164] For example, the detection value of the gravity sensor and the force applied by the force application device to the stop member are in a direct proportional relationship with a set ratio. For example, the detection value of the gravity sensor (i.e., the weight of the powder target object in grams) and the force applied by the force application device to the stop member (in Newtons) are made to satisfy a ratio of 10 to 1.

[0165] For example, the height of the rings formed by various common powder targets in different quantities within the extraction chamber can be determined experimentally. Then, the appropriate force required for each ring height can be determined, thus determining the force applied by the force-applying device to the stop component. The appropriate force values ​​corresponding to different powder targets are recorded in the controller's memory, so that the processor can look them up based on the gravity sensor's detection value when executing the computer-executable program. In other words, the centrifugal extraction device has a pre-built correspondence between various gravity sensor detection values ​​and the force applied by the force-applying device.

[0166] Those skilled in the art will understand that the force applied by the force-applying device to the stop member is determined based on the detection value of the gravity sensor, so that the stop member can apply different pressure values ​​to different amounts of powder target material, thereby making the powder target material more compact while maintaining its ring shape without collapsing.

[0167] It should be noted that steps S410 and S420 can be performed simultaneously, or step S420 can be performed after step S410 is completed.

[0168] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A control method for a centrifugal extraction apparatus, the centrifugal extraction apparatus comprising a drive device and a filter container driven to rotate by the drive device, and a stop member disposed in the filter container; in, The control method includes: In response to receiving a start command, the drive device is controlled to drive the filter container to rotate regularly at a first speed until a first preset condition is met, so that the powder target between the stop member and the bottom wall of the filter container is attached to the circumferential side wall of the filter container under the action of centrifugal force. The drive device is controlled to drive the filter container to rotate regularly at a second rotation speed, so that the extractant entering the filter container passes through the powder target under the action of centrifugal force to form a target solution and is thrown out of the filter container.

2. The control method for the centrifugal extraction apparatus according to claim 1, wherein, The first rotational speed rule includes driving the filter container to rotate continuously or intermittently at the same rotational speed, or driving the filter container to rotate alternately at at least two rotational speeds; and / or, The first preset condition is that the filter container rotates at the first speed for a first preset time, so that the powder target object forms a ring shape that adheres tightly to the circumferential sidewall of the filter container under the action of centrifugal force, thereby allowing the powder target object to be uniformly passed through by the extractant.

3. The control method for the centrifugal extraction apparatus according to claim 1, wherein, Prior to the step of controlling the drive device to drive the filter container to rotate regularly at a first rotational speed, the following steps are included: The drive device is controlled to drive the filter container to rotate regularly at a third speed until the second preset condition is reached, so that the powder target in the filter container is dispersed in the circumference of the filter container under the action of centrifugal force. The rotational speed under the third rotational speed rule is less than the rotational speed under the first rotational speed rule.

4. The control method for the centrifugal extraction apparatus according to claim 3, wherein, The third rotational speed rule includes driving the filter container to rotate continuously or intermittently at the same rotational speed, or driving the filter container to rotate alternately at at least two rotational speeds; and / or, The second preset condition is that the filter container rotates for a second preset time according to the third rotation speed rule.

5. The control method for the centrifugal extraction apparatus according to claim 1, wherein, The centrifugal extraction device also includes a liquid delivery device; The control method further includes: in response to the first preset condition being met, controlling the liquid delivery device to deliver extractant to the filter container at a preset flow rate for a third preset duration.

6. The control method for the centrifugal extraction apparatus according to claim 5, wherein, The bottom of the filter container is equipped with a gravity sensor; Prior to the step of controlling the liquid delivery device to deliver the extractant to the filter container at a preset flow rate for a third preset duration, the following steps are included: Obtain the detection value of the gravity sensor, and determine the preset flow rate and / or the third preset duration based on the detection value.

7. The control method for the centrifugal extraction apparatus according to claim 1, wherein, The centrifugal extraction apparatus further includes a force-applying device for applying a downward force to the stop member; The control method further includes: before the step of controlling the driving device to drive the filter container to rotate regularly at a second rotation speed, controlling the force application device to apply force to the stop member.

8. The control method for the centrifugal extraction apparatus according to claim 7, wherein, The stop component is made of a magnetically attractive material, and the force application device is an electromagnetic device. The step of controlling the force-applying device to apply force to the stop member includes: The current supplied to the electromagnetic device is controlled so that the electromagnetic device generates a magnetic field, thereby exerting a downward attractive force on the stop member.

9. The control method for the centrifugal extraction apparatus according to claim 7, wherein, The bottom of the filter container is equipped with a gravity sensor; Prior to the step of controlling the force-applying device to apply force to the stop member, the following is included: The detection value of the gravity sensor is obtained, and the force applied by the force application device to the stop member is determined based on the detection value.

10. A centrifugal extraction apparatus, as described in any one of claims 1 to 9, comprising: A controller includes a memory and a processor, wherein the memory stores a computer-executable program that, when executed by the processor, implements the control method according to any one of claims 1 to 9.

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