Solid-phase large-particle aerosol generating system based on eddy current theory

Abstract

The invention relates to a solid-phase large-particle aerosol generating system based on an eddy current theory, and belongs to the technical field of solid-phase particle generating systems, the solid-phase large-particle aerosol generating system comprises an upper cover and a lower cover which are buckled with each other and form an inner cavity, and the upper cover is detachably connected with a filter or a feeding assembly; the feeding assembly comprises a positioning pipe, a feeding container and a spiral conveying rod, the feeding container is arranged on the positioning pipe in a sliding mode and slides in the direction close to or away from the storage cavity, the feeding container is hollow, the two ends of the feeding container are open, the spiral conveying rod is rotationally arranged on the feeding container, the center lines of the spiral conveying rod and the feeding container coincide, and the inner diameter of the middle of the feeding container is gradually closed. The spiral conveying rod comprises an auger blade, the auger blade is located at the end, close to the storage cavity, of the feeding container after diameter shrinkage, and the device has the advantages that particles can be accurately placed in the storage cavity, and the accuracy of the measurement result is improved.

Description

Technical Field

[0001] This application relates to the technical field of solid particle generation systems, and particularly to a solid large particle aerosol generation system based on the eddy current theory. Background Art

[0002] At present, particle image velocimetry (PIV), as a "non-contact" flow field velocity measurement technology, has been widely used in the equipment R & D in various fields such as medical and health, environmental protection, aerospace, automotive, and energy. The quality of its performance largely determines the accuracy and stability of the detection results, as well as the difficulty of related tests and the reliability of the final velocity field results.

[0003] There are various existing microbial bacteria sampling systems, dust particle counting systems, etc. that use particle multi-stage mixing and stirring devices, which are large in volume, unable to be carried, and calibrated on-site. For reference, the patent with the publication number CN221062644U solves the problems of large volume, inability to carry, and on-site calibration, etc.

[0004] However, it is found in the actual use process that before each use, the filter needs to be removed, and through a medicine spoon passing through the hole for installing the filter, the particle dry powder is put into the storage cavity. There is a defect that particles are scattered outside the storage cavity during the whole process. Summary of the Invention

[0005] In order to accurately put particles into the storage cavity and improve the accuracy of the measurement results, this application provides a solid large particle aerosol generation system based on the eddy current theory.

[0006] The solid large particle aerosol generation system based on the eddy current theory provided by this application adopts the following technical solutions: A solid large particle aerosol generation system based on the eddy current theory includes an upper cover and a lower cover that are buckled with each other to form an internal cavity. A storage cavity for storing particles is opened inside the lower cover. A filter or a feeding assembly is detachably connected to the upper cover. An installation hole is opened on the upper cover, and the installation hole is located above the storage cavity. The feeding assembly includes a positioning tube, a feeding bladder, and a spiral conveyor. The feeding bladder is slidably arranged on the positioning tube and slides along the direction close to or away from the storage cavity. The feeding bladder is hollow inside and has openings at both ends. The spiral conveyor is rotatably arranged on the feeding bladder and their center lines coincide. The inner diameter of the middle part of the feeding bladder is gradually constricted. The spiral conveyor itself includes a screw blade, and the screw blade is located at the end of the feeding bladder after the diameter is reduced and close to the storage cavity. The installation hole is used for the filter or the positioning tube to be inserted and connected.

[0007] By adopting the above technical solution, when it is necessary to add particles to the storage cavity, the positioning tube of the feeding assembly is inserted into the mounting hole. At this time, rotate the screw conveyor rod. Since the auger blade is located at the end of the feeding bladder after its diameter reduction and close to the storage cavity, as the screw conveyor rod rotates, the auger blade can push the particles in the feeding bladder along the diameter-reduced part of the feeding bladder step by step to one end close to the storage cavity. The feeding bladder is slidably arranged on the positioning tube, and the relative position between the feeding bladder and the storage cavity can be adjusted according to actual needs to ensure that the particles can accurately fall into the storage cavity. The internal diameter of the feeding bladder is reduced and cooperates with the auger blade to cause slight extrusion between the particles, improving the density between the particles. When the screw conveyor rod does not operate, the auger blade will block the particles, to a certain extent preventing the particles from directly falling due to gravity. The internal friction of the material itself and the friction between the material and the screw blade and the conveyor tube wall will also hinder the sliding of the particles. Compared with the traditional method of using a medicine spoon to put materials through a hole, this feeding assembly uses the screw conveyor principle to effectively avoid the situation that particles scatter outside the storage cavity during the feeding process, so that the particles can be accurately placed into the storage cavity, reducing particle loss and improving the accuracy of the measurement result.

[0008] Optionally, a receiving cavity and a long slot are formed on the positioning tube. The long slot is opened along the length direction of the positioning tube, and the receiving cavity is located within the wall thickness of the positioning tube and is opened in a circle along the circumferential direction of the positioning tube. A pressing rod is fixed on the feeding bladder, the pressing rod penetrates through the long slot, and a first spring is arranged in the receiving cavity. One end of the first spring abuts against the pressing rod.

[0009] By adopting the above technical solution, the first spring provides elastic force for the pressing rod, so that when the feeding bladder is not subjected to external force, it can ensure that the feeding bladder is received in the positioning tube and its position remains relatively stable. When it is necessary to adjust the distance between the feeding bladder and the storage cavity, the elastic force of the first spring can be overcome by external force to push the pressing rod to slide along the long slot, thereby driving the feeding bladder to move and realizing flexible adjustment of the position of the feeding bladder. This structural design facilitates the operator to accurately control the relative position between the feeding bladder and the storage cavity according to the actual situation, further improving the accuracy of the particles falling into the storage cavity.

[0010] Optionally, a pull cap is arranged on the pressing rod. The pull cap is inserted into the end of the pressing rod far from the positioning tube. A pull rod and a second spring are arranged on the pressing rod. The pull rod is arranged along the length direction of the pressing rod and one end of it is fixedly connected to the pull cap. The pull rod is slidably arranged relative to the pressing rod along the direction close to or away from the positioning tube. The second spring is used to provide a force for the pull rod to slide in the direction close to the positioning tube; a cross bar is fixed on the outer wall of the positioning tube, and a baffle is fixed at one end of the cross bar far from the positioning tube; when the pressing rod abuts against the cross bar, the pull cap is inserted into the baffle, the pull rod penetrates through the baffle, and the second spring is in a compressed state.

[0011] By adopting the above technical solution, when the pressure rod slides to abut against the cross bar, the pull cap can be inserted into the baffle, and the second spring is in a compressed state. This structure forms a locking mechanism to ensure that the feeding bladder will not move due to accidental force after the position is adjusted, further improving the stability and accuracy of the feeding process. When the position of the feeding bladder needs to be adjusted again, the operator only needs to pull the pull cap to overcome the elastic force of the second spring and separate the pull cap from the baffle to readjust the position of the feeding bladder.

[0012] Optionally, an inner liner is arranged inside the feeding liner, and the length of the inner liner extends to the place where the diameter of the feeding liner is reduced. The inner wall of the inner liner is arranged parallel to the inner wall of the feeding liner, and a third spring is fixed between the inner liner and the feeding liner; the interior of the pressure rod is hollow and one end is open and passes through the feeding liner, the pull rod and the second spring are both located inside the pressure rod, and a ball is arranged inside the pressure rod for rolling, the diameter of the ball is larger than the distance between the end of the pressure rod and the outer wall of the inner liner, and the ball is located at the end of the pull rod facing the inner liner.

[0013] By adopting the above technical solution, the pull cap is pulled away from the pressure rod and then released. The second spring provides the pull rod with a force to move in the direction of the positioning tube. The pull rod pushes the ball to hit the inner liner. The inner liner shakes due to the external force. The setting of the third spring provides a shaking space for the shaking of the inner liner. The particles inside the inner liner will further slide downward, reducing the residual particles on the inner liner, so that the particles are vibrated and pre-compacted in advance before entering the auger blades.

[0014] Optionally, corrugated edge seals are fixed between both ends of the inner liner and the feeding liner, and the corrugated edge seals have deformation capability.

[0015] By adopting the above technical solution, when the inner liner is subjected to external force, that is, the impact of the ball, the corrugated edge seal can be stretched and deformed accordingly, effectively preventing particles from sliding between the inner liner and the feeding liner, thereby ensuring the integrity of the particles transported in the inner liner and the feeding liner.

[0016] Optionally, a stirring rod and a driving assembly for driving the stirring rod to rotate are arranged on the lower cover, one end of the stirring rod extends into the bottom of the storage cavity, and the stirring rod is rotatably arranged on the lower cover and rotates relative to the lower cover.

[0017] By adopting the above technical solution, the driving component can drive the stirring rod to rotate and stir the particles in the storage cavity. The stirring process can make the particles more evenly distributed in the storage cavity, avoiding the accumulation or agglomeration of particles, so as to ensure that in subsequent applications such as particle velocity measurement technology (PIV), the distribution of particles in the flow field more meets the test requirements, improving the accuracy and stability of the detection results. Stirring the particles in the storage cavity also overcomes the defect caused by the spiral conveyor rod densely extruding the particles when transporting them to the storage cavity (that is, dense dry powder particles are not conducive to following the airflow into the particle mixing cavity. The dry powder is too dense, the gap between particles becomes smaller, and it is difficult for the airflow to penetrate and drive the dry powder to move. Moreover, the dense dry powder may form larger block structures, increasing the difficulty of being driven by the airflow, resulting in unstable dry powder volume entering the particle mixing cavity and affecting the subsequent mixing effect and the accuracy of related detections or experiments).

[0018] Optionally, the driving component includes a stirring box, a stirring column, a push rod, a sleeve and a fourth spring. The stirring box is fixed to the bottom surface of the lower cover and is located directly below the storage cavity. One end of the stirring rod away from the storage cavity penetrates into the stirring box and is fixedly connected to one end of the stirring column. One end of the sleeve is sleeved on the outer wall of the stirring column. An inclined slideway is provided on the outer wall of the stirring column. The slideway is inclined. A slider is fixed on the inner wall of the sleeve. The slider is inserted into the slideway and slides along the length direction of the slideway. The fourth spring is used to push the push rod to move away from the stirring column. One end of the push rod is located outside the stirring box, and the other end penetrates into the stirring box and is fixedly connected to the sleeve. The push rod is slidably arranged relative to the stirring box in a direction close to or away from the stirring column.

[0019] By adopting the above technical solution, when the push rod is pushed to move towards the stirring column, the sleeve drives the slider to slide in the inclined slideway of the stirring column. Due to the inclination of the slideway, the stirring column will drive the stirring rod to rotate. When the push rod is not subject to external force, the fourth spring can push the push rod to reset and stop the stirring column from rotating. This structural design realizes the intermittent rotation of the stirring rod through simple mechanical transmission, facilitating the operator to control the stirring frequency according to actual needs, and effectively improving the flexibility and controllability of stirring the particles in the storage cavity.

[0020] Optionally, a coil spring is arranged between the stirring rod and the stirring box. One end of the coil spring is fixedly connected to the stirring box, and the other end is fixedly connected to the outer wall of the stirring rod.

[0021] By adopting the above technical solution, the coil spring provides a restoring force for the stirring rod. When the stirring rod rotates under the action of the driving component and the driving component stops working, the coil spring will quickly reset the stirring rod to prevent the stirring rod from continuing to rotate due to inertia and affecting the distribution state of the particles in the storage cavity.

[0022] Optionally, a push plate is fixed to the end of the push rod away from the sleeve. The fourth spring ring is sleeved on the push rod, and one end is fixedly connected to the push plate, and the other end is fixedly connected to the outer wall of the mixing box.

[0023] By adopting the above technical solution, the push plate increases the force-bearing area of the push rod, facilitating the operator to apply an external force to push the push rod.

[0024] Optionally, a sealing cover is rotatably arranged at the end of the positioning tube away from the upper cover. An arc-shaped hole is opened on the sealing cover, and the spiral conveying rod penetrates through the arc-shaped hole.

[0025] By adopting the above technical solution, when the feeding component is not in use, the sealing cover can block the positioning tube and the feeding bladder, which can reduce the entry of external impurities into the feeding component to a certain extent and affect particle transportation. When the feeding component needs to be used, rotate the sealing cover so that the spiral conveying rod can freely rotate through the arc-shaped hole without affecting the normal operation of the feeding component. The design of the arc-shaped hole not only ensures the rotational freedom of the spiral conveying rod but also reduces the entry of impurities into the feeding component from the connection between the sealing cover and the spiral conveying rod to a certain extent.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Precise feeding: The feeding component utilizes the principle of spiral conveying. The auger blades on the spiral conveying rod push the particles along the reduced-diameter part of the feeding bladder to the end close to the storage cavity. The position of the feeding bladder can be adjusted slidably, effectively avoiding particle scattering, accurately putting the particles into the storage cavity, reducing particle loss, and improving the accuracy of the measurement result; 2. Component coordination optimization: An inner bladder is arranged in the feeding bladder. Cooperating with the third spring, the particles can be pre-compacted and the residue can be reduced by the impact of the spherical ball on the inner bladder; the corrugated strip seals at both ends of the inner bladder prevent particle leakage; the stirring rod and the driving component of the lower cover can evenly stir the particles in the storage cavity, overcoming the problem of particle compaction caused by spiral conveying, ensuring that the particle distribution in the flow field meets the test requirements, and further improving the detection accuracy and stability; 3. Convenient and stable operation: The first spring on the positioning tube cooperates with the pressure rod to facilitate the adjustment of the position of the feeding bladder; the pull cap, pull rod, second spring, cross bar, and baffle form a locking mechanism to ensure the stable position of the feeding bladder; the driving component realizes the intermittent rotation of the stirring rod, and cooperates with the spring return, facilitating the operator to control the stirring frequency and improving the flexibility and controllability of the equipment operation. Description of the Drawings

[0027] Figure 1 is a schematic structural view of the present application embodiment when installing the filter; Figure 2 is a schematic structural view of the feeding component; Figure 3 is a vertical sectional view of the present application embodiment when installing the filter; Figure 4 It is a partial structural perspective view showing the position of the eddy current generation cavity in the display adjustment base; Figure 5 It is a vertical structural sectional view at the feeding assembly; Figure 6 It is Figure 3 The enlarged view at position A in Figure 7 It is a schematic diagram showing the position of the slideway after the outer wall of the stirring column is flattened; Figure 8 It is a schematic diagram showing the position after the feeding assembly is inserted and embedded in the mounting hole.

[0028] In the figure, 1. upper cover; 11. filter; 12. mounting hole; 13. adjusting knob; 14. pin; 15. sealing ring; 2. lower cover; 21. storage cavity; 22. stirring rod; 23. mixing cavity; 24. particle outlet; 25. positioning ring; 251. positioning hole; 26. main air passage; 3. feeding assembly; 31. positioning tube; 311. accommodating cavity; 312. long slot; 313. first spring; 314. cross bar; 315. baffle; 32. feeding bladder; 33. spiral conveyor rod; 4. pressing rod; 41. pulling cap; 42. pulling rod; 43. second spring; 44. fixed plate; 45. pushing plate; 46. spherical ball; 5. inner bladder; 51. third spring; 52. corrugated strip seal; 6. driving assembly; 61. stirring box; 62. stirring column; 621. slideway; 63. push rod; 631. pushing piece; 64. sleeve; 641. slider; 65. fourth spring; 66. coil spring; 7. cover; 71. arc hole; 8. adjustment base; 81. connection hole; 82. eddy current generation cavity. Detailed implementation manners

[0029] The following further elaborates on this application in conjunction with the attached Figures 1-8 drawings.

[0030] The embodiment of this application discloses a solid-phase large-particle aerosol generation system based on the eddy current theory.

[0031] Referring to Figure 1 and Figure 2 , a solid-phase large-particle aerosol generation system based on the eddy current theory includes an upper cover 1, a lower cover 2, a filter 11 and a feeding assembly 3. The upper cover 1 and the lower cover 2 are buckled and connected to form a cavity inside. An adjusting knob 13 is rotatably arranged on the upper cover 1. One end of the adjusting knob 13 penetrates through the upper cover 1 into the cavity. A mounting hole 12 is formed on the upper cover 1. The filter 11 or the feeding assembly 3 is inserted and embedded in the mounting hole 12 to form a detachable connection state with the upper cover 1.

[0032] Referring to Figure 3 and Figure 4, one end of the lower cover 2 far from the upper cover 1 is connected to the air inlet of the external dust particle counter device. A positioning ring 25, a sealing ring 15 and an adjusting seat 8 are arranged on the lower cover 2. The center line of the adjusting seat 8 coincides with the center line of the lower cover 2. The adjusting seat 8 is rotatably arranged on the lower cover 2, that is, the adjusting seat 8 rotates relative to the lower cover 2. The top and bottom of the adjusting seat 8 communicate with each other to form a main air path 26. A pin 14 is fixed between the adjusting seat 8 and the adjusting knob 13. A storage cavity 21, a mixing cavity 23 and a particle outlet 24 are formed on the lower cover 2. The mixing cavity 23 is located directly below the adjusting seat 8 and is constricted in the vertical direction. One end of the particle outlet 24 communicates with the mixing cavity 23, and the other end penetrates to the outside. The storage cavity 21 is located directly below the mounting hole 12. The positioning ring 25 is sleeved outside the adjusting seat 8 and fixedly connected to the lower cover 2. A connection hole 81 and a vortex generating cavity 82 are formed on the adjusting seat 8. The connection hole 81 penetrates the adjusting seat 8 in the vertical direction. The connection hole 81 is arranged adjacent to the main air path 26. One end of the vortex generating cavity 82 is opened at the vertical side wall of the connection hole 81, and the other end is opened into the mixing cavity 23. The path of the overall length direction of the vortex generating cavity 82 is arranged in a vortex rotation shape. A positioning hole 251 is formed on the positioning ring 25. The positioning hole 251 is located directly below the mounting hole 12. Rotating the adjusting knob 13, the adjusting knob 13 drives the adjusting seat 8 to rotate through the pin 14. There is an overlapping area among the positioning hole 251, the connection hole 81 and the storage cavity 21. The sealing ring 15 is sleeved and fixed on the outer circumferential wall of the positioning ring 25. The outer wall of the sealing ring 15 abuts against the inner wall of the upper cover 1.

[0033] Reference Figure 2 , Figure 5 and Figure 8, the feeding assembly 3 includes a positioning tube 31, a spiral conveyor rod 33 and a feeding bladder 32. One end of the positioning tube 31 is rotatably provided with a cover 7. The rotation axis of the cover 7 and the positioning tube 31 is arranged along the length direction of the positioning tube 31. An arc-shaped hole 71 is opened on the cover 7. The arc-shaped hole 71 extends from the edge of the cover 7 to the center point of the cover 7 and is in an arc shape. A receiving cavity 311 and a long slot 312 are opened on the positioning tube 31. The long slot 312 is opened along the length direction of the positioning tube 31. The receiving cavity 311 is located within the wall thickness of the positioning tube 31 itself and is opened in a circle along the circumferential direction of the positioning tube 31. A first spring 313 is arranged in the receiving cavity 311. A pressing rod 4 is fixed on the feeding bladder 32. The pressing rod 4 passes through the long slot 312 and slides along the length direction of the long slot 312. One end of the first spring 313 abuts against the pressing rod 4, and the other end abuts against the bottom of the receiving cavity 311. The spiral conveyor rod 33 is rotatably arranged on the feeding bladder 32 and can be rotatably connected to the feeding bladder 32 through an ordinary rod, which will not be described in detail here. The center line of the spiral conveyor rod 33 coincides with the center line of the feeding bladder 32, and the feeding bladder 32 is slidably arranged thereon. Both ends of the feeding bladder 32 are open and the inner diameter in the middle is gradually constricted. The spiral conveyor rod 33 itself includes auger blades, and the auger blades are located at the end of the feeding bladder 32 after constriction and close to the storage cavity 21. The spiral conveyor rod 33 passes through the arc-shaped hole 71. In this embodiment, only one pressing rod 4 is described in detail, Figure 5 For the other side shown in [reference], it is only necessary to keep the force symmetry with an ordinary rod, or the pressing rods 4 can be symmetrically arranged on both sides of the feeding bladder 32.

[0034] Reference Figure 1 , Figure 5 And Figure 8 , after the positioning tube 31 is inserted and embedded in the mounting hole 12, the end of the feeding bladder 32 after constriction faces the storage cavity 21. An inner bladder 5, a third spring 51 and a corrugated strip seal 52 are arranged in the feeding bladder 32. The length of the inner bladder 5 extends to the end where the feeding bladder 32 is completely constricted. The inner wall of the inner bladder 5 is arranged parallel to the inner wall of the feeding bladder 32. The corrugated strip seal 52 has the ability of elastic deformation. There are two corrugated strip seals 52 and they are distributed at both ends of the inner bladder 5. The corrugated strip seal 52 is fixed between the inner bladder 5 and the inner wall of the feeding bladder 32 to block the gap between the inner bladder 5 and the feeding bladder 32. The third spring 51 is located between the two corrugated strip seals 52 and between the inner bladder 5 and the feeding bladder 32. One end of the third spring 51 is fixedly connected to the inner bladder 5, and the other end is fixedly connected to the inner wall of the feeding bladder 32. One end of the pressing rod 4 is open and passes through the feeding bladder 32 and faces the outer wall of the inner bladder 5 with a distance therebetween.

[0035] Reference Figure 2 And Figure 5, the pressure rod 4 is hollow inside. A pull cap 41, a pull rod 42, a second spring 43, a fixed plate 44, a spherical ball 46 and a push plate 45 are arranged on the pressure rod 4. The pull cap 41 is inserted and embedded at the end of the pressure rod 4 away from the positioning tube 31. Along the direction close to the inner container 5, the fixed plate 44, the second spring 43, the push plate 45 and the spherical ball 46 are arranged in sequence. The fixed plate 44 is fixed on the inner wall of the pressure rod 4. The pull rod 42 is arranged along the length direction of the pressure rod 4 and one end thereof is fixedly connected with the pull cap 41. The pull rod 42 is slidably arranged relative to the pressure rod 4 along the direction close to or away from the positioning tube 31. The other end of the pull rod 42 penetrates through the fixed plate 44 and is fixedly connected with the push plate 45. The push plate 45 is slidably arranged inside the pressure rod 4. The second spring 43 is sleeved on the pull rod 42 and one end thereof is fixedly connected with the fixed plate 44 and the other end is fixedly connected with the push plate 45. The spherical ball 46 is rollably arranged inside the pressure rod 4. The diameter of the spherical ball 46 is larger than the distance between the end of the pressure rod 4 and the outer wall of the inner container 5.

[0036] Reference Figure 2 and Figure 5 , a cross bar 314 is fixed on the outer wall of the positioning tube 31. A baffle 315 is fixed at one end of the cross bar 314 away from the positioning tube 31. A notch is formed in the baffle 315 from top to bottom. When the pressure rod 4 abuts against the cross bar 314, the pull cap 41 is inserted and embedded in the baffle 315. The inner diameter of the notch gradually increases from small to large, which is convenient for the pull rod 42 to penetrate through the baffle 315 and also convenient for the pull cap 41 to be inserted and embedded in the baffle 315. At this time, the second spring 43 is in a compressed state, and the feeding bile 32 and the positioning tube 31 form a position locking state. In this embodiment, the pull cap 41 is arranged in a T shape, that is, the pull cap 41 has a protruding part, and the protruding part is inserted and embedded in the baffle 315.

[0037] Reference Figure 3 , Figure 6 and Figure 7, a stirring rod 22 and a driving assembly 6 are provided on the lower cover 2. The driving assembly 6 includes a stirring box 61, a stirring column 62, a push rod 63, a sleeve 64 and a fourth spring 65. The stirring box 61 is fixed to the bottom surface of the lower cover 2 and is located directly below the storage cavity 21. One end of the stirring rod 22 penetrates into the storage cavity 21, and the other end penetrates into the stirring box 61 and is fixedly connected to one end of the stirring column 62. The part of the stirring rod 22 located in the storage cavity 21 is bent. One end of the sleeve 64 is sleeved on the outer wall of the stirring column 62. A slideway 621 is formed on the outer wall of the stirring column 62. The slideway 621 is inclined. A slider 641 is fixed on the inner wall of the sleeve 64. The slider 641 is inserted into the slideway 621 and slides along the length direction of the slideway 621. One end of the push rod 63 is located outside the stirring box 61 and is fixed with a push piece 631, and the other end penetrates into the stirring box 61 and is fixedly connected to the sleeve 64. The fourth spring 65 is sleeved on the outer wall of the push rod 63 and is located outside the stirring box 61. One end of the fourth spring 65 is fixedly connected to the outer wall of the stirring box 61, and the other end is fixedly connected to the push piece 631. The push rod 63 is slidably arranged relative to the stirring box 61 in a direction close to or away from the stirring column 62, and the sleeve 64 and the stirring rod 22 rotate relative to the stirring box 61.

[0038] Reference Figure 6 , a coil spring 66 is arranged between the stirring rod 22 and the stirring box 61. One end of the coil spring 66 is fixedly connected to the stirring box 61, and the other end is fixedly connected to the outer wall of the stirring rod 22.

[0039] The implementation principle of an aerosol generation system for solid large particles based on the eddy current theory in an embodiment of the present application is as follows: Remove the filter 11, insert the positioning tube 31 into the mounting hole 12, add particle dry powder into the inner tank 5, cover the sealing cap 7, then pull the pull cap 41 and release it. The spherical ball 46 is pushed towards the inner tank 5 and impacts the inner tank 5. The inner tank 5 vibrates to shake off the particle dry powder on its inner wall. Pull the pull cap 41 again and press down the pressing rod 4 until the pressing rod 4 abuts against the cross bar 314 and inserts the pull cap 41 into the baffle 315. At this time, the end of the feeding chamber 32 has been aligned with the storage cavity 21. Rotate the screw conveyor 33 to feed into the storage cavity 21. Thus, the filling of the storage cavity 21 is completed. At this time, the particles in the storage cavity 21 have been compacted by the auger blades, so as to ensure that the particles will not fall outside the storage cavity 21 when filling the storage cavity 21. Press the push rod 63, and the sleeve 64 drives the stirring column 62 to rotate through the cooperation of the slider 641 and the chute, that is, the stirring rod 22 rotates to stir and disperse the particles in the storage cavity 21, so as to ensure that the particles can move with the generation of the air path when the subsequent adjustment knob 13 is opened.

[0040] During the experiment: Insert the filter 11 into the mounting hole 12. Connect the end of the lower cover 2 to the air inlet of the external dust particle counter device. In the initial state, there is no overlapping area among the connection hole 81, the positioning hole 251, and the storage chamber 21. At this time, the dust particle counter device serves as the suction power source. When sucking air, the air entering from the filter 11 is divided into two air paths: The adjustment knob 13 is in the closed state. The air path enters from the filter 11 and flows out from the particle outlet 24 after passing through the main air path 26 and the mixing chamber 23 in sequence. Rotate the adjustment knob 13, and the adjustment seat 8 rotates to gradually rotate the connection hole 81 between the positioning hole 251 and the storage chamber 21. Once there is an overlapping area among the three, the air path will enter from the filter 11 and flow out from the particle outlet 24 after passing through the positioning hole 251, the connection hole 81, the eddy current generation chamber 82, and the mixing chamber 23 in sequence. The storage chamber 21 is communicated with the air path, providing a channel for particles to enter the air path. That is, when the air flow enters the eddy current generation chamber 82, due to its curved closed surface structure, eddy currents will be generated. The pressure in the central area of the eddy current is relatively low, forming a negative pressure area. The particles in the storage chamber 21 are attracted into the air path under the action of the external atmospheric pressure and this negative pressure difference. The particles entering the air path are then driven by the eddy current and enter the subsequent particle mixing chamber 23 along with the rotational movement of the eddy current.

[0041] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A solid phase large particle aerosol generating system based on eddy current theory, comprising an upper cover (1) and a lower cover (2) which are interlocked to form an internal cavity, wherein a storage cavity (21) for storing particles is provided inside the lower cover (2), characterized in that: The upper cover (1) is detachably connected to a filter (11) or a feeding assembly (3). The upper cover (1) is provided with a mounting hole (12), and the mounting hole (12) is located above the storage chamber (21). The feeding assembly (3) comprises a positioning tube (31), a feeding bladder (32), and a spiral conveying rod (33). The feeding bladder (32) is slidably arranged on the positioning tube (31) and slides in a direction approaching or moving away from the storage chamber (21). The feeding bladder (32) is hollow inside and has two open ends. The spiral conveying rod (33) is rotatably arranged on the feeding bladder (32) and the center lines of the two coincide. The inner diameter of the middle part of the feeding bladder (32) is gradually narrowed. The spiral conveying rod (33) itself comprises an auger blade, and the auger blade is located at the end of the feeding bladder (32) after the diameter is reduced and close to the storage chamber (21). The mounting hole (12) is used for plugging and connecting the filter (11) or the positioning tube (31).

2. The solid phase large particle aerosol generating system based on eddy current theory according to claim 1, characterized in that: The positioning tube (31) is provided with a receiving cavity (311) and an elongated hole (312). The elongated hole (312) is provided along the length direction of the positioning tube (31). The receiving cavity (311) is located within the wall thickness of the positioning tube (31) and is provided along the circumference of the positioning tube (31). A pressure rod (4) is fixed to the feeding bladder (32). The pressure rod (4) passes through the elongated hole (312). A first spring (313) is provided in the receiving cavity (311). One end of the first spring (313) is in contact with the pressure rod (4).

3. The solid phase large particle aerosol generating system based on eddy current theory according to claim 2, characterized in that: The pressure rod (4) is provided with a pull cap (41), which is inserted into the end of the pressure rod (4) away from the positioning tube (31). The pressure rod (4) is provided with a pull rod (42) and a second spring (43). The pull rod (42) is arranged along the length direction of the pressure rod (4) and one end is fixedly connected to the pull cap (41). The pull rod (42) is arranged to slide relative to the pressure rod (4) in a direction approaching or away from the positioning tube (31). The second spring (43) is used to provide a force for the pull rod (42) to slide in a direction approaching the positioning tube (31). The outer wall of the positioning tube (31) is fixed with a cross bar (314), and a baffle (315) is fixed to the end of the cross bar (314) away from the positioning tube (31). When the pressure rod (4) abuts against the cross bar (314), the pull cap (41) is inserted into the baffle (315), the pull rod (42) penetrates the baffle (315), and the second spring (43) is in a compressed state.

4. The solid phase large particle aerosol generating system based on eddy current theory according to claim 3, characterized in that: An inner liner (5) is arranged inside the feeding liner (32), the inner liner (5) is extended to the point where the feeding liner (32) is completely reduced in diameter, the inner wall of the inner liner (5) is arranged parallel to the inner wall of the feeding liner (32), and a third spring (51) is fixed between the inner liner (5) and the feeding liner (32); the pressure rod (4) is hollow inside and one end is open and passes through the feeding liner (32), the pull rod (42) and the second spring (43) are both located inside the pressure rod (4), a ball (46) is arranged inside the pressure rod (4) for rolling, the diameter of the ball (46) is greater than the distance between the end of the pressure rod (4) and the outer wall of the inner liner (5), and the ball (46) is located at the end of the pull rod (42) facing the inner liner (5).

5. The solid phase large particle aerosol generating system based on eddy current theory according to claim 4, characterized in that: Corrugated edge seals (52) are fixed between both ends of the inner liner (5) and the feeding liner (32), and the corrugated edge seals (52) have the ability to deform.

6. The solid phase large particle aerosol generating system based on eddy current theory according to claim 1, characterized in that: The lower cover (2) is provided with a stirring rod (22) and a driving assembly (6) for driving the stirring rod (22) to rotate. One end of the stirring rod (22) extends into the bottom of the storage cavity (21). The stirring rod (22) is rotatably arranged on the lower cover (2) and rotates relative to the lower cover (2).

7. The solid phase large particle aerosol generating system based on eddy current theory according to claim 6, characterized in that: The driving assembly (6) comprises a stirring box (61), a stirring column (62), a push rod (63), a sleeve (64) and a fourth spring (65); the stirring box (61) is fixed to the bottom surface of the lower cover (2) and is located directly below the storage chamber (21); one end of the stirring rod (22) away from the storage chamber (21) passes through the stirring box (61) and is fixedly connected to one end of the stirring column (62); one end of the sleeve (64) is sleeved on the outer wall of the stirring column (62); a slideway (621) is provided on the outer wall of the stirring column (62); the slideway (621) The sleeve (64) is in an inclined shape. A slider (641) is fixed on the inner wall of the sleeve (64). The slider (641) is inserted into the slideway (621) and slides along the length direction of the slideway (621). The fourth spring (65) is used to push the push rod (63) to move in a direction away from the stirring column (62). One end of the push rod (63) is located outside the stirring box (61), and the other end passes through the inside of the stirring box (61) and is fixedly connected to the sleeve (64). The push rod (63) is arranged to slide relative to the stirring box (61) in a direction close to or away from the stirring column (62).

8. The solid phase large particle aerosol generating system based on eddy current theory according to claim 7, characterized in that: A coil spring (66) is provided between the stirring rod (22) and the stirring box (61); one end of the coil spring (66) is fixedly connected to the stirring box (61), and the other end of the coil spring (66) is fixedly connected to the outer wall of the stirring rod (22).

9. The solid phase large particle aerosol generating system based on eddy current theory according to claim 7, characterized in that: A push piece (631) is fixed to one end of the push rod (63) away from the sleeve (64); a fourth spring (65) is sleeved on the push rod (63) and one end of the fourth spring is fixedly connected to the push piece (631) and the other end is fixedly connected to the outer wall of the stirring box (61).

10. The solid phase large particle aerosol generating system based on eddy current theory according to claim 1, characterized in that: A sealing cover (7) is rotatably provided at one end of the positioning tube (31) away from the upper cover (1), an arc-shaped hole (71) is provided on the sealing cover (7), and the spiral conveying rod (33) passes through the arc-shaped hole (71).

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