A stem cell extraction device with adjustable filtering precision

Abstract

This invention relates to the field of stem cell extraction equipment technology, specifically to a stem cell extraction device with adjustable filtration precision, comprising a main body; a support and a collection box are provided within the main body; a fixed plate is provided in the middle of the support; the support has an upper support plate and a lower support plate; the upper support plate has multiple through holes; the fixed plate has multiple through holes; the lower support plate has multiple through holes; a variable diameter filter element is provided between the upper, middle, and lower through holes; and the main body has a driving mechanism. This invention uses the driving mechanism to synchronously drive the upper and lower support plates to move up and down relative to the fixed plate, thereby causing the variable diameter filter element to undergo controllable deformation, changing the effective filtration pore size of the filter inlet and outlet, thus completing the filtration adjustment from coarse to fine filtration without stopping the machine to disassemble and replace the filter material, simplifying the stem cell extraction operation process, and avoiding the risk of exogenous contamination during disassembly and assembly.

Description

Technical Field

[0001] This invention relates to the field of stem cell extraction equipment technology, and specifically to a stem cell extraction device with adjustable filtration precision. Background Technology

[0002] Stem cell technology is a core research direction in the field of regenerative medicine, with extremely broad application prospects in cell therapy, tissue engineering, disease model construction, and new drug development. The isolation and purification of stem cells is the core step in the entire stem cell preparation process, directly determining the purity, activity, recovery rate, and biosafety of the final stem cell preparation. Filtration, with its advantages of gentle operation, high separation efficiency, and minimal cell damage, has become the most commonly used separation method in stem cell extraction and purification.

[0003] Currently, commercially available filtration equipment for stem cell extraction generally uses fixed-pore-size membranes or screens as the core filtration element, with each unit capable of only achieving a single level of filtration precision. However, in actual stem cell extraction processes, stem cell samples from various sources (such as umbilical cord blood, bone marrow fluid, adipose tissue digestion fluid, and placental tissue homogenate) contain a large number of impurities of different particle sizes, including tissue debris, red blood cells, immune contaminants, and cell clumps. These require multi-stage gradient filtration of varying precision to gradually remove impurities and obtain high-purity target stem cells. This necessitates frequent machine shutdowns during filtration to disassemble and reassemble the equipment and replace filter media of different specifications. This not only results in cumbersome procedures and long sample processing cycles but also greatly increases the risk of introducing exogenous microbial contamination during disassembly and reassembly, leading to sample inactivation. Furthermore, repeated disassembly and reassembly significantly prolong the contact time between the cell suspension and the external environment, causing a significant decrease in stem cell activity and severely impacting the quality of the final stem cell preparation. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a stem cell extraction device with adjustable filtration precision.

[0005] The objective of this invention is achieved through the following technical solution: a stem cell extraction device with adjustable filtration precision, comprising a main body; a support and a collection box are provided within the main body; a fixing plate is provided in the middle of the support; an upper support plate is movably mounted on the top of the support and fixed plate; a lower support plate is movably mounted on the bottom of the support and fixed plate; the upper support plate has multiple upper through holes; the fixed plate has multiple middle through holes; the lower support plate has multiple lower through holes; the upper through holes, middle through holes, and lower through holes are arranged opposite each other; a variable diameter filter element is provided between the upper through holes, middle through holes, and lower through holes;

[0006] The main body is equipped with a drive mechanism for driving the upper support plate and the lower support plate to move up and down.

[0007] The present invention is further configured such that the variable diameter filter element includes a plurality of elastic filter sheets spaced apart along the circumferential direction; a flexible sealing sheet is fixedly provided between two adjacent elastic filter sheets; the middle part of the elastic filter sheet is fixedly provided on the inner wall of the central through hole; the top of the elastic filter sheet is movably provided in the upper through hole; and the bottom of the elastic filter sheet is movably provided in the lower through hole.

[0008] The present invention is further configured such that a filter cavity is formed between the middle portion of the plurality of elastic filter sheets and the middle portion of the plurality of flexible sealing sheets; a filter inlet communicating with the filter cavity is formed between the top portion of the plurality of elastic filter sheets and the top portion of the plurality of flexible sealing sheets; and a filter outlet communicating with the filter cavity is formed between the bottom portion of the plurality of elastic filter sheets and the bottom portion of the plurality of flexible sealing sheets.

[0009] The present invention is further configured such that an upper flexible annular membrane is provided inside the upper through hole; the outer wall of the upper flexible annular membrane is fixedly connected to the inner wall of the upper through hole; and the inner wall of the upper flexible annular membrane is fixedly connected to the top of the elastic filter sheet.

[0010] The present invention is further configured such that a lower flexible annular membrane is provided inside the lower through hole; the outer wall of the lower flexible annular membrane is fixedly connected to the inner wall of the lower through hole; and the inner wall of the lower flexible annular membrane is fixedly connected to the bottom of the elastic filter sheet.

[0011] The present invention is further configured such that the driving mechanism includes a plurality of airbags disposed on a fixed plate; the middle part of the airbag is fixedly connected to the fixed plate; the top of the airbag is fixedly connected to an upper support plate; the bottom of the airbag is fixedly connected to a lower support plate; and the airbag undergoes elastic deformation along the height direction.

[0012] The bracket and fixing plate are provided with a first driving air passage that communicates with the airbag.

[0013] The present invention is further configured such that the driving mechanism includes an air pump disposed outside the main body and a driving seat disposed inside the main body; the top of the driving seat is provided with an air inlet chamber; the air pump is connected to the air inlet chamber; a valve core is sealed and movable within the air inlet chamber; the valve core is provided with a first air port connected to the air inlet chamber and a second air port connected to the first air port; the driving seat is provided with a second driving air passage connected to the first driving air passage.

[0014] The present invention is further configured such that the drive seat has a lower cavity at the bottom of the second drive air passage; a rotor is rotatably mounted in the lower cavity; the rotor is provided with inclined fan blades; the drive seat is provided with an air outlet pipe communicating with the lower cavity; an electromagnet is provided at the top of the air inlet chamber; and a permanent magnet cooperating with the electromagnet is provided at the top of the valve core.

[0015] The present invention is further configured such that a scraper is movably provided on the top surface of the upper support plate; the top of the scraper protrudes into the lower cavity and is connected to the rotor.

[0016] The present invention is further configured such that the main body is provided with a feed pipe; the outlet of the feed pipe is located at the top of the upper support plate.

[0017] The beneficial effects of the present invention are as follows: The present invention drives the upper support plate and the lower support plate to move up and down relative to the fixed plate in a synchronous manner through the drive mechanism, thereby causing the variable diameter filter element to undergo controllable deformation, changing the effective filtration pore size of the filter inlet and the filter outlet, thus completing the filtration adjustment from coarse filtration to fine filtration without stopping the machine to disassemble and replace the filter material, simplifying the operation process of stem cell extraction, and avoiding the risk of external contamination during disassembly and assembly. Attached Figure Description

[0018] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention after concealing the main body and the collection box;

[0021] Figure 3 This is a structural schematic diagram of the invention from another perspective after the main body and collection box are hidden;

[0022] Figure 4 This is a cross-sectional view of the present invention;

[0023] Figure 5 yes Figure 4 A magnified view of part A in the middle;

[0024] Figure 6 This is a cross-sectional view from another perspective of the present invention;

[0025] Figure 7 yes Figure 6 A magnified view of part B in the middle;

[0026] Figure 8 This is a schematic diagram of the structure of the variable diameter filter element of the present invention;

[0027] Figure 9 This is a structural schematic diagram of the variable diameter filter element of the present invention from another perspective;

[0028] The components are as follows: 1. Body; 11. Support; 12. Collection box; 13. Air pump; 14. Feed pipe; 2. Fixing plate; 21. Central through hole; 3. Upper support plate; 31. Upper through hole; 32. Upper flexible annular membrane; 4. Lower support plate; 41. Lower through hole; 42. Lower flexible annular membrane; 5. Variable diameter filter element; 51. Elastic filter sheet; 52. Flexible sealing sheet; 53. Filter chamber; 54. Filter inlet; 55. Filter outlet; 6. Airbag; 61. First driving air passage; 7. Drive seat; 71. Air inlet chamber; 72. Second driving air passage; 73. Electromagnet; 8. Valve core; 81. First air port; 82. Second air port; 83. Permanent magnet; 9. Lower cavity; 91. Rotor; 92. Inclined fan blade; 93. Air outlet pipe; 94. Scraper. Detailed Implementation

[0029] The present invention will be further described in conjunction with the following embodiments.

[0030] Depend on Figures 1 to 9 As can be seen, the stem cell extraction device with adjustable filtration precision described in this embodiment includes a main body 1; the main body 1 is provided with a support 11 and a collection box 12; a fixing plate 2 is provided in the middle of the support 11; an upper support plate 3 is provided on the top of the support 11 and movable up and down on the fixing plate 2; a lower support plate 4 is provided on the bottom of the support 11 and movable up and down on the fixing plate 2; the upper support plate 3 is provided with multiple upper through holes 31; the fixing plate 2 is provided with multiple middle through holes 21; the lower support plate 4 is provided with multiple lower through holes 41; the upper through holes 31, middle through holes 21 and lower through holes 41 are arranged opposite each other; a variable diameter filter element 5 is provided between the upper through holes 31, middle through holes 21 and lower through holes 41; the main body 1 is provided with a drive mechanism for driving the upper support plate 3 and the lower support plate 4 to move up and down.

[0031] Specifically, in this embodiment, a support frame is constructed using a bracket 11. The three coaxially aligned fixed plate 2, upper support plate 3, and lower support plate 4 provide a stable installation and deformation reference for the variable diameter filter element 5. The drive mechanism can synchronously drive the upper support plate 3 and lower support plate 4 to perform symmetrical lifting and lowering movements relative to the fixed plate 2, thereby providing stable power transmission for the pore size adjustment of the variable diameter filter element 5. The stem cell sample to be filtered enters from above the upper support plate 3, and after being filtered and purified by the variable diameter filter element 5, the qualified stem cell suspension falls into the collection box 12 below for centralized collection.

[0032] The stem cell extraction device with adjustable filtration precision described in this embodiment includes a variable diameter filter element 5 comprising a plurality of elastic filter sheets 51 spaced apart along the circumferential direction; a flexible sealing sheet 52 is fixedly provided between two adjacent elastic filter sheets 51; the middle part of the elastic filter sheet 51 is fixedly provided on the inner wall of the central through hole 21; the top of the elastic filter sheet 51 is movably provided in the upper through hole 31; and the bottom of the elastic filter sheet 51 is movably provided in the lower through hole 41.

[0033] Specifically, in this embodiment, the elastic filter sheet 51 uses the fixed point between its center and the inner wall of the central through hole 21 as its deformation fulcrum. The top and bottom of the elastic filter sheet 51 undergo radial expansion or contraction deformation as the upper support plate 3 and the lower support plate 4 move up and down. The flexible sealing sheet 52 between adjacent elastic filter sheets 51 can expand and contract synchronously with the deformation of the elastic filter sheet 51, always maintaining a sealed state between adjacent elastic filter sheets 51, together forming a complete filter sidewall structure. In this embodiment, the filter pore size is directly adjusted through the radial deformation of the elastic filter sheet 51, and the filtration accuracy can be switched without replacing the filter material.

[0034] This embodiment describes a stem cell extraction device with adjustable filtration precision. A filter cavity 53 is formed between the middle portions of multiple elastic filter sheets 51 and multiple flexible sealing sheets 52. A filter inlet 54, communicating with the filter cavity 53, is formed between the top portions of the multiple elastic filter sheets 51 and the top portions of the multiple flexible sealing sheets 52. A filter outlet 55, also communicating with the filter cavity 53, is formed between the bottom portions of the multiple elastic filter sheets 51 and the bottom portions of the multiple flexible sealing sheets 52. Specifically, the filter cavity 53, formed by the elastic filter sheets 51 and the flexible sealing sheets 52, allows the stem cell sample to enter through the top filter inlet 54, while the target stem cells meeting the particle size requirements flow out through the bottom filter outlet 55. The radial expansion or contraction deformation of the upper and lower ends of the elastic filter sheets 51 directly and synchronously changes the radius of the filter inlet 54 and the filter outlet 55, thereby achieving adjustment of the filtration precision.

[0035] This embodiment describes a stem cell extraction device with adjustable filtration precision. An upper flexible annular membrane 32 is provided within the upper through-hole 31. The outer wall of the upper flexible annular membrane 32 is fixedly connected to the inner wall of the upper through-hole 31. The inner wall of the upper flexible annular membrane 32 is fixedly connected to the top of the elastic filter sheet 51. Specifically, the upper flexible annular membrane 32 serves as a connection and sealing component between the upper support plate 3 and the top of the elastic filter sheet 51. It can transmit the lifting power of the upper support plate 3 to the top of the elastic filter sheet 51, causing it to undergo radial deformation. Furthermore, it can continuously fill the annular gap between the inner wall of the upper through-hole 31 and the elastic filter sheet 51 throughout the entire process of the upper support plate 3's lifting and the top of the elastic filter sheet 51's radial movement, achieving a complete, dead-angle-free seal.

[0036] This embodiment describes a stem cell extraction device with adjustable filtration precision. A lower flexible annular membrane 42 is provided within the lower through-hole 41. The outer wall of the lower flexible annular membrane 42 is fixedly connected to the inner wall of the lower through-hole 41. The inner wall of the lower flexible annular membrane 42 is fixedly connected to the bottom of the elastic filter 51. Specifically, the lower flexible annular membrane 42 serves as a connection and sealing component between the lower support plate 4 and the bottom of the elastic filter 51. It can transmit the lifting power of the lower support plate 4 to the bottom of the elastic filter 51, causing it to undergo radial deformation. Furthermore, it can continuously fill the annular gap between the inner wall of the lower through-hole 41 and the elastic filter 51 throughout the entire process of the lower support plate 4 lifting and the bottom of the elastic filter 51 moving radially, achieving a complete, dead-angle-free seal.

[0037] The stem cell extraction device with adjustable filtration precision described in this embodiment includes a driving mechanism comprising multiple airbags 6 disposed on a fixed plate 2; the middle part of each airbag 6 is fixedly connected to the fixed plate 2; the top of each airbag 6 is fixedly connected to an upper support plate 3; the bottom of each airbag 6 is fixedly connected to a lower support plate 4; the airbag 6 undergoes elastic deformation along the height direction; the support 11 and the fixed plate 2 are provided with a first driving airway 61 communicating with the airbags 6.

[0038] Specifically, the airbag 6 serves as the driving actuator. With the middle of the airbag 6 and the fixed point of the fixed plate 2 as a reference, when air is inflated into the airbag 6 through the first driving air passage 61, the airbag 6 undergoes elastic expansion deformation along the height direction, simultaneously pushing the upper support plate 3 upward and the lower support plate 4 downward, causing the upper support plate 3 and the lower support plate 4 to move away from the fixed plate 2 simultaneously. When air is deflated from the airbag 6 through the first driving air passage 61, the airbag 6 undergoes contraction deformation along the height direction, simultaneously pulling the upper support plate 3 downward and the lower support plate 4 upward, causing the upper support plate 3 and the lower support plate 4 to move closer together. The fixed plate 2 provides a synchronous bidirectional driving force for the deformation of the variable diameter filter element 5. When the airbag 6 is inflated, the upper support plate 3 and the lower support plate 4 move synchronously away from the fixed plate 2, the top and bottom of the elastic filter 51 expand outward, and the radius of the filter inlet 54 and the filter outlet 55 increases, thus achieving coarse filtration. When the airbag 6 is deflated, the upper support plate 3 and the lower support plate 4 move synchronously closer to the fixed plate 2, the top and bottom of the elastic filter 51 contract inward, and the radius of the filter inlet 54 and the filter outlet 55 decreases, thus achieving fine filtration.

[0039] The stem cell extraction device with adjustable filtration precision described in this embodiment includes a drive mechanism that further comprises an air pump 13 located outside the main body 1 and a drive seat 7 located inside the main body 1; the top of the drive seat 7 is provided with an air inlet chamber 71; the air pump 13 is connected to the air inlet chamber 71; a valve core 8 is provided in the air inlet chamber 71 with a sealed lifting mechanism; the valve core 8 is provided with a first air port 81 connected to the air inlet chamber 71 and a second air port 82 connected to the first air port 81; the drive seat 7 is provided with a second drive air passage 72 connected to a first drive air passage 61; wherein the air pump 13 has the functions of inflating and deflating.

[0040] Specifically, after the positive or negative pressure airflow output by the air pump 13 enters the air intake chamber 71 of the drive seat 7, the opening and closing and direction of the air passage can be controlled by the lifting and lowering movement of the valve core 8 within the air intake chamber 71. When the valve core 8 moves to the point where the second air port 82 connects with the second drive air passage 72, the airflow in the air intake chamber 71 can enter the airbag 6 through the second drive air passage 72 and the first drive air passage 61, thereby controlling the inflation or deflation of the airbag 6, and thus controlling the lifting and lowering displacement of the upper support plate 3 and the lower support plate 4 to adjust the filtration accuracy. This structure controls the opening and closing of the air passage through the displacement of the valve core 8. By controlling the inflation and deflation volume of the air pump 13, the deformation of the airbag 6 can be controlled, thereby achieving stepless adjustment of the filter pore size. The air pump 13 has both inflation and deflation functions, enabling bidirectional drive of the airbag 6. It can push the upper support plate 3 and the lower support plate 4 away from the fixed plate 2, or pull the upper support plate 3 and the lower support plate 4 closer to the fixed plate 2.

[0041] This embodiment describes a stem cell extraction device with adjustable filtration precision. The drive seat 7 has a lower cavity 9 at the bottom of the second drive air passage 72. A rotor 91 is rotatably mounted inside the lower cavity 9. The rotor 91 has inclined fan blades 92. The drive seat 7 has an air outlet pipe 93 communicating with the lower cavity 9. An electromagnet 73 is located at the top of the air inlet chamber 71. A permanent magnet 83, cooperating with the electromagnet 73, is located at the top of the valve core 8. When the electromagnet 73 attracts the permanent magnet 83, the valve core 8 moves upward, thereby connecting the second drive air passage 72 with the second air port 82. When the electromagnet 73 and the permanent magnet 83 repel each other, the valve core 8 moves downward, thereby connecting the lower cavity 9 with the second air port 82.

[0042] Specifically, in this embodiment, by controlling the direction of the current in the electromagnet 73, the direction of the magnetic force between the electromagnet 73 and the permanent magnet 83 can be changed, thereby controlling the lifting and lowering displacement of the valve core 8 and realizing rapid switching of the air path: when the electromagnet 73 is energized and generates an attractive force, the permanent magnet 83 drives the valve core 8 to move upward, connecting the second air port 82 with the second driving air passage 72, and the air path leads to the airbag 6, realizing the adjustment and control of the filtration accuracy; when the electromagnet 73 is energized and generates a repulsive force, the permanent magnet 83 drives the valve core 8 to move downward, connecting the second air port 82 with the lower cavity 9, and the airflow output by the air pump 13 enters the lower cavity 9, impacting the inclined fan blades 92 of the rotor 91 at high speed, driving the rotor 91 to rotate at high speed in the cavity, and the airflow after doing work is finally discharged from the outlet pipe 93. This embodiment, through the cooperation of a single air path system with the electromagnet 73 and the valve core 8, realizes the integrated switching control of the two functions of filtration accuracy adjustment and rotor 91 rotation drive, without the need for an additional independent drive motor and power system, effectively simplifying the equipment structure.

[0043] This embodiment describes a stem cell extraction device with adjustable filtration precision. A scraper 94 is movably mounted on the top surface of the upper support plate 3. The top of the scraper 94 protrudes into the lower cavity 9 and connects to the rotor 91. Specifically, when the rotor 91 rotates at high speed driven by airflow, it synchronously drives the scraper 94 to rotate in a circular motion against the top surface of the upper support plate 3, thereby scraping and cleaning the blockages such as tissue debris, cell clumps, and large molecular impurities accumulated at the filter inlet 54 in real time.

[0044] This embodiment describes a stem cell extraction device with adjustable filtration precision. The main body 1 is equipped with a feed pipe 14; the outlet of the feed pipe 14 is located at the top of the upper support plate 3. The feed pipe 14 serves as a closed input channel for the stem cell sample to be processed, and can stably transport the stem cell suspension to be filtered to the top surface of the upper support plate 3.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A stem cell extraction device with adjustable filtration precision, characterized in that: The system includes a main body (1); the main body (1) contains a support (11) and a collection box (12); the support (11) has a fixing plate (2) in the middle; the support (11) has an upper support plate (3) that is movable up and down at the top of the fixing plate (2); the support (11) has a lower support plate (4) that is movable up and down at the bottom of the fixing plate (2); the upper support plate (3) has multiple upper through holes (31); the fixing plate (2) has multiple middle through holes (21); the lower support plate (4) has multiple lower through holes (41); the upper through holes (31), middle through holes (21) and lower through holes (41) are arranged opposite each other; a variable diameter filter element (5) is provided between the upper through holes (31), middle through holes (21) and lower through holes (41); The main body (1) is provided with a drive mechanism for driving the upper support plate (3) and the lower support plate (4) to perform lifting and lowering activities.

2. The stem cell extraction device with adjustable filtration precision according to claim 1, characterized in that: The variable diameter filter element (5) includes a plurality of elastic filter sheets (51) spaced apart along the circumferential direction; a flexible sealing sheet (52) is fixed between two adjacent elastic filter sheets (51); the middle part of the elastic filter sheet (51) is fixedly disposed on the inner wall of the central through hole (21); the top of the elastic filter sheet (51) is movably disposed in the upper through hole (31); and the bottom of the elastic filter sheet (51) is movably disposed in the lower through hole (41).

3. The stem cell extraction device with adjustable filtration precision according to claim 2, characterized in that: A filter chamber (53) is formed between the middle of a plurality of elastic filter sheets (51) and the middle of a plurality of flexible sealing sheets (52); a filter inlet (54) communicating with the filter chamber (53) is formed between the top of a plurality of elastic filter sheets (51) and the top of a plurality of flexible sealing sheets (52); and a filter outlet (55) communicating with the filter chamber (53) is formed between the bottom of a plurality of elastic filter sheets (51) and the bottom of a plurality of flexible sealing sheets (52).

4. The stem cell extraction device with adjustable filtration precision according to claim 3, characterized in that: The upper through hole (31) is provided with an upper flexible annular membrane (32); the outer wall of the upper flexible annular membrane (32) is fixedly connected to the inner wall of the upper through hole (31); the inner wall of the upper flexible annular membrane (32) is fixedly connected to the top of the elastic filter sheet (51).

5. The stem cell extraction device with adjustable filtration precision according to claim 3, characterized in that: The lower through hole (41) is provided with a lower flexible annular membrane (42); the outer wall of the lower flexible annular membrane (42) is fixedly connected to the inner wall of the lower through hole (41); the inner wall of the lower flexible annular membrane (42) is fixedly connected to the bottom of the elastic filter (51).

6. The stem cell extraction device with adjustable filtration precision according to claim 1, characterized in that: The driving mechanism includes multiple airbags (6) disposed on the fixed plate (2); the middle part of the airbag (6) is fixedly connected to the fixed plate (2); the top of the airbag (6) is fixedly connected to the upper support plate (3); the bottom of the airbag (6) is fixedly connected to the lower support plate (4); the airbag (6) undergoes elastic deformation along the height direction; The bracket (11) and the fixing plate (2) are provided with a first driving airway (61) communicating with the airbag (6).

7. The stem cell extraction device with adjustable filtration precision according to claim 6, characterized in that: The drive mechanism also includes an air pump (13) located outside the main body (1) and a drive seat (7) located inside the main body (1); the top of the drive seat (7) is provided with an air inlet chamber (71); the air pump (13) is connected to the air inlet chamber (71); a valve core (8) is provided in the air inlet chamber (71) with a sealed lifting and moving mechanism; the valve core (8) is provided with a first air port (81) connected to the air inlet chamber (71) and a second air port (82) connected to the first air port (81); the drive seat (7) is provided with a second drive air passage (72) connected to the first drive air passage (61).

8. The stem cell extraction device with adjustable filtration precision according to claim 7, characterized in that: The drive seat (7) has a lower cavity (9) at the bottom of the second drive air passage (72); a rotor (91) is rotatably mounted inside the lower cavity (9); the rotor (91) is provided with inclined fan blades (92); the drive seat (7) is provided with an air outlet pipe (93) communicating with the lower cavity (9); an electromagnet (73) is provided at the top of the air inlet chamber (71); and a permanent magnet (83) that cooperates with the electromagnet (73) is provided at the top of the valve core (8).

9. The stem cell extraction device with adjustable filtration precision according to claim 8, characterized in that: The top surface of the upper support plate (3) is movably provided with a scraper (94); the top of the scraper (94) protrudes into the lower cavity (9) and is connected to the rotor (91).

10. The stem cell extraction device with adjustable filtration precision according to claim 1, characterized in that: The main body (1) is provided with a feed pipe (14); the outlet of the feed pipe (14) is located at the top of the upper support plate (3).

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