A sampler for virus collection based on aerosol sampling technology

Abstract

This invention relates to the field of air monitoring technology and discloses a virus sampler based on aerosol sampling technology. The sampler includes a gas guide chamber, with an annular mounting plate I fixedly installed on its outer surface. An acute-angle air inlet is located on the outer surface of the gas guide chamber above the annular mounting plate I, and the portion of the outer surface of the gas guide chamber below the annular mounting plate I is conical. This design allows high-pressure gas to enter the gas guide chamber through the acute-angle air inlet. Due to the contraction of the internal cavity, the gas velocity increases as it passes through the cavity between the gas guide chamber and the gas guide sleeve. Because the gas undergoes a spiral motion after entering the gas guide chamber through the acute-angle air inlet, the centrifugal force on the aerosols in the gas is increased, thus better attracting aerosol particles to the outside. This increases the contact probability between the aerosols and the collection liquid, thereby improving the collection efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of air monitoring technology, specifically to a sampler for virus collection based on aerosol sampling technology. Background Technology

[0002] With social development and technological advancements, people are increasingly concerned about environmental issues. To more conveniently detect the quantity of particles, harmful organisms, and viruses in the air, aerosol samplers are used to sample the air. Traditional samplers consist of an air pump, a spiral chamber, a sampling bottle, and various pipes and wiring. During operation, the air pump drives gas into the spiral chamber, where the gas rotates downwards. The aerosols in the gas move outwards under centrifugal force and enter the sampling bottle. The collection liquid in the sampling bottle also generates a vortex under the influence of the airflow and comes into contact with the spiral gas containing aerosols, causing the aerosols to enter the collection liquid. After a period of time, the collection ends, and various tests can be performed on the collection liquid to obtain specific air quality data. This type of sampler has the advantages of simple structure, ease of use, and low cost, and is currently the most widely used sampler.

[0003] While existing aerosol sampling samplers have the advantages mentioned above, they still have certain limitations in practical use. Due to the excessively high flow rate of the spiral airflow into the sampling bottle and the long collection process, the evaporation rate of the collected liquid in the sampling bottle is too fast, resulting in insufficient collection liquid volume and reduced collection efficiency. In addition, the difference between the rotation speed of the vortex formed by the collected liquid in the sampling bottle and the flow speed of the spiral airflow leads to greater resistance when the aerosol is immersed in the collection liquid, resulting in reduced collection efficiency. To address these issues, this application proposes a virus collection sampler based on aerosol sampling technology. Summary of the Invention

[0004] In view of the shortcomings of existing virus sampling devices based on aerosol sampling technology mentioned in the background art, the present invention provides a virus sampling device based on aerosol sampling technology, which has a similar rotation speed of the vortex formed by the collected liquid in the sampling bottle to the flow speed of the spiral airflow, thus solving the problems mentioned in the background art.

[0005] This invention provides the following technical solution: a sampler for virus collection based on aerosol sampling technology, comprising a shell, a filter cover fixedly installed on the top of the shell, a mounting base I fixedly installed on the inner wall of the shell near the top, an air supply unit fixedly installed on the top of the mounting base I, an air inlet fixedly installed on the top of the air supply unit near the outer side, an air guide hole provided at the center of the top of the air supply unit, an air outlet fixedly installed on the bottom of the air supply unit near the outer side, a mounting base II fixedly installed on the inner wall of the shell below the mounting base I, an air guide device fixedly installed on the top of the mounting base II, a socket fixedly installed on the inside of the shell near the bottom, a rotating device movably sleeved on the inner ring of the socket, a collecting device placed on the top of the rotating device, the collecting device contacting the air guide device, a power unit fixedly installed on the bottom of the inner cavity of the shell, a drive gear fixedly installed at one end of the output shaft of the power unit, the drive gear meshing with the rotating device, and a replacement hole provided on the outer surface of the shell, the position of the replacement hole corresponding to the collecting device.

[0006] Preferably, the air guiding device includes an air guiding chamber, an annular mounting plate I is fixedly installed on the outer surface of the air guiding chamber, the annular mounting plate I is fixedly installed on the top of the mounting base II, an acute-angle air inlet is provided on the outer surface of the air guiding chamber above the annular mounting plate I, the portion of the outer surface of the air guiding chamber below the annular mounting plate I is tapered, an exhaust nozzle is fixedly installed on the top of the air guiding chamber, an air guiding sleeve is fixedly installed at the center of the top of the air guiding chamber, the exhaust nozzle is connected to the air guiding sleeve, a contact base is fixedly installed near the bottom of the air guiding chamber, the bottom of the contact base is in contact with the collecting device, and a contact sensor is fixedly installed on the bottom of the contact base.

[0007] Preferably, the output terminal of the contact sensor is connected to the input terminal of the power unit via a signal connection.

[0008] Preferably, the rotating device includes a rotating base, a connecting hole is provided at the center of the top of the rotating base, and a placement seat is fixedly installed at the outer side of the connecting hole on the top of the rotating base. The placement seats are distributed in a circular array. A collecting device is placed on the top of the placement seat. A sleeve groove is provided on the outer surface of the rotating base, and the sleeve groove is sleeved with the sleeve seat. A mating groove is provided at the bottom of the rotating base. The inner wall of the mating groove is provided with gear teeth, and the gear teeth mesh with the driving gear.

[0009] Preferably, the collecting device includes a collecting tube placed on top of the placement base, the top of the collecting tube contacting the bottom of the contact base, a support plate fixedly installed on the inner wall of the collecting tube, a vortex plate fixedly installed on the top of the support plate near the outer side, the vortex plates being distributed in a ring array, the vortex plates being fixedly connected to the inner wall of the collecting tube, a circular through hole being opened at the center of the top of the support plate, and a triggering device fixedly installed at the bottom of the circular through hole, the triggering device extending to the bottom of the collecting tube.

[0010] Preferably, the triggering device includes a trigger sleeve, a flow plate is fixedly installed on the inner wall of the trigger sleeve near the bottom, a flow hole is opened on the top of the flow plate, a connecting seat is fixedly installed on the bottom of the flow plate outside the flow hole, a spring is fixedly installed on the top of the flow plate near the outer side, a switch seat is fixedly installed inside the trigger sleeve above the flow plate, a stepped hole is opened on the top of the switch seat, and a blocking plate is movably installed inside the stepped hole, and the top of the spring is fixedly connected to the blocking plate.

[0011] Preferably, a pipe is fixedly connected to the bottom of the connector, and the pipe is connected to the liquid supply pump.

[0012] The present invention has the following beneficial effects:

[0013] 1. This invention features an acute-angle air inlet on the outer surface of the air guide chamber, positioned above the annular mounting plate I. The portion of the outer surface of the air guide chamber below the annular mounting plate I is conical. This design allows high-pressure gas to enter the air guide chamber through the acute-angle air inlet. Due to the contraction of the internal cavity of the air guide chamber, the gas flow velocity increases as it passes through the cavity between the air guide chamber and the air guide sleeve. Because the gas undergoes a spiral motion after entering the air guide chamber through the acute-angle air inlet, the centrifugal force on the aerosols in the gas is also increased. This better causes the aerosol particles in the gas to move outward, thereby increasing the contact probability between the aerosols and the collection liquid and improving the collection efficiency of the device.

[0014] 2. This invention features a mating groove at the bottom of the rotating base, with gear teeth on the inner wall of the groove meshing with a drive gear. During use, the power unit drives the rotating base to rotate via the drive gear. The collecting tube is placed on top of the placement base. As the rotating base rotates, it drives the collecting tube to rotate as well. A vortex plate is fixedly installed near the outer edge of the top of the support plate, arranged in a circular array. During rotation, the collecting tube contacts the internal collecting liquid through the vortex plate, causing the liquid to rotate. The centrifugal force of the rotating liquid creates vortices, resulting in an inward concave area near the center and an upward extension near the outer edge. This increases the contact area between the collecting liquid and the spiral gas, improving the concentration of aerosols in the spiral gas. The device reduces the contact probability between the aerosol and the collecting liquid. Furthermore, when the collecting liquid generates a vortex, it covers the vortex plate, preventing the vortex plate from contacting the spiral gas and slowing down the gas flow rate. This reduces the contact probability between the aerosol and the collecting liquid, improving the stability of the device during operation. In addition, compared to traditional devices that rely solely on gas to rotate the collecting liquid, resulting in a large speed difference between the spiral gas and the collecting liquid, which prevents aerosols from entering the collecting liquid when they come into contact with the surface, the device described in this application effectively avoids this problem. When the vortex plate rotates the collecting liquid, it increases the circumferential flow speed of the collecting liquid, thereby reducing the speed difference between the collecting liquid and the spiral gas, allowing the aerosol to enter the collecting liquid more effectively and improving the collection efficiency of the device.

[0015] 3. In this invention, the bottom of the contact base contacts the collection device. A contact sensor is fixedly installed on the bottom of the contact base. Because the top of the collection tube contacts the bottom of the contact base, the liquid level near the outer part of the collection tube rises continuously under the action of rotation until the collection liquid contacts the contact sensor located at the top of the collection tube. At this time, the contact sensor will sense the force brought by the contact of the collection liquid. At this time, the output end of the contact sensor is connected to the input end of the power machine through a signal connection, thereby stopping the acceleration of the power machine. At this time, the liquid level depth near the center of the collection tube reaches the maximum, and the liquid level near the outer part reaches the highest, thereby maximizing the liquid surface area. At this time, the contact probability between the collection liquid and the aerosol in the spiral gas also reaches the maximum, thereby maximizing the aerosol collection effect of the device and further improving the collection efficiency of the device.

[0016] 4. This invention features a stepped hole at the top of the switch base, with a blocking plate movably installed inside. The top of the spring is fixedly connected to the blocking plate. When the liquid level inside the collection pipe is lower than the top of the trigger sleeve, resulting in excessively low pressure, the spring pushes open the blocking plate, allowing the supply pump to provide the collection liquid. A pipe is fixedly connected to the bottom of the connecting base and is connected to the supply pump, allowing the collection liquid to enter the interior of the trigger sleeve through the pipe and flow hole. Since the blocking plate is open at this time, the collection liquid can enter the cavity above the blocking plate inside the trigger sleeve through the switch base, thus replenishing the collection liquid. This prevents the collection liquid inside the trigger sleeve from evaporating under the action of airflow, causing the liquid level to drop too low, exposing the top surface of the support plate, and directly contacting the spiral gas, which would reduce the collection efficiency. This further improves the operational stability of the device. Attached Figure Description

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a front view schematic diagram of the structure of the present invention;

[0019] Figure 3 The structure of the present invention Figure 2 Schematic diagram of cross-section along direction A;

[0020] Figure 4 The structure of the present invention Figure 3 Schematic diagram of cross section in the B direction;

[0021] Figure 5 This is a schematic diagram of the air guiding device of the present invention;

[0022] Figure 6 This is a front view schematic diagram of the air guiding device of the present invention;

[0023] Figure 7 The structure of the present invention Figure 6 Schematic diagram of cross-section along the C-direction;

[0024] Figure 8 The structure of the present invention Figure 7 Schematic diagram of cross section in the middle D direction;

[0025] Figure 9 This is a schematic diagram of the rotating device of the present invention;

[0026] Figure 10 This is a front view schematic diagram of the rotating device of the present invention;

[0027] Figure 11 The structure of the present invention Figure 10 Schematic diagram of cross section in the middle E direction;

[0028] Figure 12 This is a schematic diagram of the structural collection device of the present invention;

[0029] Figure 13 This is a top view schematic diagram of the structural collection device of the present invention;

[0030] Figure 14 The structure of the present invention Figure 13 Schematic diagram of cross section in the middle F direction;

[0031] Figure 15 The structure of the present invention Figure 14 Enlarged diagram of point G in the middle.

[0032] In the diagram: 1. Outer shell; 2. Filter cover; 3. Mounting base I; 4. Air supply unit; 5. Air inlet; 6. Air duct; 7. Air outlet; 8. Mounting base II; 9. Air guiding device; 91. Air guiding chamber; 92. Annular mounting plate I; 93. Acute-angle air inlet; 94. Exhaust nozzle; 95. Air guiding sleeve; 96. Contact base; 97. Contact sensor; 10. Socket; 11. Rotating device; 111. Rotating base; 112. Connecting... 113. Through hole; 114. Placement seat; 12. Mating groove; 12. Collection device; 121. Collection pipe; 122. Support plate; 123. Swirl plate; 124. Triggering device; 1241. Trigger sleeve; 1242. Flow plate; 1243. Flow hole; 1244. Connecting seat; 1245. Spring; 1246. Switch seat; 1247. Blocking plate; 13. Power unit; 14. Drive gear; 15. Replacement hole. Detailed Implementation

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Please see Figures 1-4A virus sampler based on aerosol sampling technology includes a housing 1, a filter cover 2 fixedly mounted on the top of the housing 1, a mounting base I 3 fixedly mounted on the inner wall of the housing 1 near the top, an air supply unit 4 fixedly mounted on the top of the mounting base I 3, an air inlet 5 fixedly mounted on the top of the air supply unit 4 near the outer side, an air guide hole 6 provided at the center of the top of the air supply unit 4, an air outlet 7 fixedly mounted on the bottom of the air supply unit 4 near the outer side, and a mounting base II 8 fixedly mounted on the inner wall of the housing 1 below the mounting base I 3. An air guiding device 9 is fixedly installed on the top of the housing 8. A socket 10 is fixedly installed near the bottom inside the housing 1. A rotating device 11 is movably fitted on the inner ring of the socket 10. A collecting device 12 is placed on the top of the rotating device 11. The collecting device 12 is in contact with the air guiding device 9. A power unit 13 is fixedly installed at the bottom of the inner cavity of the housing 1. A drive gear 14 is fixedly installed at one end of the output shaft of the power unit 13. The drive gear 14 meshes with the rotating device 11. A replacement hole 15 is opened on the outer surface of the housing 1, and the position of the replacement hole 15 corresponds to the collecting device 12.

[0035] Please see Figures 1-8 and Figures 12-15The gas guiding device 9 includes a gas guiding chamber 91. An annular mounting plate I 92 is fixedly installed on the outer surface of the gas guiding chamber 91. The annular mounting plate I 92 is fixedly installed on the top of the mounting base II 8. An acute-angle air inlet 93 is opened on the outer surface of the gas guiding chamber 91 above the annular mounting plate I 92. The part of the outer surface of the gas guiding chamber 91 below the annular mounting plate I 92 is set into a conical shape, so that after the high-pressure gas enters the interior of the gas guiding chamber 91 through the acute-angle air inlet 93, the internal cavity of the gas guiding chamber 91 contracts, causing the gas to pass through the gas guiding chamber 91 and the gas guiding sleeve. During the process of filling the cavity between 95, the flow rate will increase. Because the gas enters the interior of the gas guide chamber 91 through the acute-angle inlet 93 in a spiral motion, the centrifugal force on the aerosols in the gas is also increased. This better causes the aerosol particles in the gas to move outward, thereby increasing the contact probability between the aerosols and the collecting liquid and improving the collection efficiency of the device. An exhaust nozzle 94 is fixedly installed on the top of the gas guide chamber 91, and a gas guide sleeve 95 is fixedly installed at the center of the top of the inner cavity of the gas guide chamber 91. The exhaust nozzle 94 and the gas guide sleeve... The cylinder 95 is connected to the gas guide chamber 91. A contact base 96 is fixedly installed near the bottom of the inner cavity of the gas guide chamber 91. The bottom of the contact base 96 is in contact with the collecting device 12. A contact sensor 97 is fixedly installed at the bottom of the contact base 96. Because the top of the collecting tube 121 is in contact with the bottom of the contact base 96, the liquid level of the collecting liquid inside the collecting tube 121 increases continuously near the outer part under the action of rotation until the collecting liquid comes into contact with the contact sensor 97 located at the top of the collecting tube 121. At this time, the contact sensor 97 will sense the force brought by the contact of the collecting liquid. At this time, the output end of the contact sensor 97 is connected to the input end of the power machine 13 through the signal connection, so that the power machine 13 stops accelerating. At this time, the liquid level depth of the collecting liquid near the center of the collecting tube 121 reaches the maximum, and the liquid level near the outer part reaches the highest, so that the liquid surface area of ​​the collecting liquid reaches the maximum. At this time, the contact probability between the collecting liquid and the aerosol in the spiral gas also reaches the maximum, so that the aerosol collection effect of the device reaches the maximum and the collection efficiency of the device is further improved.

[0036] Please see Figures 1-8 The output of the contact sensor 97 is connected to the input of the power unit 13 via a signal connection.

[0037] Please see Figures 1-4 and Figures 9-11The rotating device 11 includes a rotating base 111. A connecting hole 112 is provided at the center of the top of the rotating base 111. A placement seat 113 is fixedly installed on the top of the rotating base 111 outside the connecting hole 112. The placement seats 113 are distributed in a circular array. A collecting device 12 is placed on the top of the placement seat 113. A socket groove is provided on the outer surface of the rotating base 111, and the socket groove is fitted with a socket seat 10. A mating groove 114 is provided at the bottom of the rotating base 111. The inner wall of the mating groove 114 is provided with gear teeth, and the gear teeth mesh with the drive gear 14, so that during the use of the device, the power unit 13 will drive the rotating base 111 to rotate through the drive gear 14.

[0038] Please see Figures 5-8 and Figures 12-15 The collecting device 12 includes a collecting pipe 121, which is placed on top of a placement base 113. During rotation, the rotating base 111 drives the collecting pipe 121 to rotate via the placement base 113. The top of the collecting pipe 121 contacts the bottom of the contact base 96. A support plate 122 is fixedly installed on the inner wall of the collecting pipe 121. A vortex plate 123 is fixedly installed on the top of the support plate 122 near the outer edge. The vortex plates 123 are arranged in a ring array. During rotation, the collecting pipe 121 contacts the internal collecting liquid through the vortex plates 123, causing the internal collecting liquid to rotate. During this rotation, the collecting liquid generates vortices under centrifugal force, resulting in an inward concave area near the center and an upward extension near the outer edge. This increases the contact area between the collecting liquid and the spiral gas, increasing the contact probability between aerosols in the spiral gas and the collecting liquid. Simultaneously, when the collecting liquid generates vortices, it covers the vortex plates 123, thus preventing the vortex plates 123 from contacting the spiral gas. The device avoids the problem of slowing down the gas flow rate due to contact, thereby reducing the probability of contact between aerosol and the collecting liquid and improving the stability of the device during operation. In addition, compared with traditional equipment that only drives the collecting liquid to rotate by gas, resulting in an excessive difference in rotational speed between the spiral gas and the collecting liquid, which causes aerosol to be unable to enter the collecting liquid when in contact with the surface of the collecting liquid due to the large speed difference, the device involved in this application avoids this problem. When the vortex plate 123 drives the collecting liquid to rotate, it will increase the circumferential flow speed of the collecting liquid, thereby reducing the speed difference between the collecting liquid and the spiral gas, allowing the aerosol to enter the collecting liquid better and improving the collection efficiency of the device. The vortex plate 123 is fixedly connected to the inner wall of the collecting pipe 121. The cross-sectional shape of the vortex plate 123 is triangular. A circular through hole is opened at the center of the top of the bearing plate 122, and a trigger device 124 is fixedly installed at the bottom of the circular through hole, extending to the bottom of the collecting pipe 121.

[0039] Please see Figures 12-15 The triggering device 124 includes a trigger sleeve 1241. A flow plate 1242 is fixedly installed on the inner wall of the trigger sleeve 1241 near the bottom. A flow hole 1243 is opened at the top of the flow plate 1242. A connecting seat 1244 is fixedly installed at the bottom of the flow plate 1242 outside the flow hole 1243. A spring 1245 is fixedly installed at the top of the flow plate 1242 near the outer side. A switch seat 1246 is fixedly installed inside the trigger sleeve 1241 above the flow plate 1242. A stepped hole is opened at the top of the switch seat 1246, and a blocking plate 1247 is movably installed inside the stepped hole. The top of the spring 1245 is fixedly connected to the blocking plate 1247. The liquid level of the collected liquid inside the collecting tube 121 is lower than the top of the trigger sleeve 1241. If the pressure is too low, the spring will push open the blocking plate 1247, allowing the liquid supply pump to provide the collection liquid. At this time, a pipe is fixedly connected to the bottom of the connecting seat 1244 and is connected to the liquid supply pump. The collection liquid enters the interior of the trigger sleeve 1241 through the pipe and the flow hole 1243. Since the blocking plate 1247 is in the open state at this time, the collection liquid can enter the cavity above the blocking plate 1247 inside the trigger sleeve 1241 through the switch seat 1246, thereby replenishing the collection liquid. This avoids the problem of the collection liquid inside the trigger sleeve 1241 evaporating under the action of airflow, causing the liquid level to be too high, exposing the top surface of the support plate 122, and directly contacting the spiral gas, which would reduce the collection efficiency. This further improves the operational stability of the device.

[0040] Please see Figure 15 A pipe is fixedly connected to the bottom of the connector 1244, and the pipe is connected to the liquid supply pump.

[0041] The method of using this invention is as follows:

[0042] During use, the outer surface of the gas guide chamber 91, located below the annular mounting plate I 92, is set in a conical shape. This allows the high-pressure gas to enter the gas guide chamber 91 through the acute-angle inlet 93. Due to the contraction of the cavity inside the gas guide chamber 91, the gas flow rate increases as it passes through the cavity between the gas guide chamber 91 and the gas guide sleeve 95. Since the gas moves in a spiral motion after entering the gas guide chamber 91 through the acute-angle inlet 93, the centrifugal force on the aerosols in the gas is also increased. This allows the aerosol particles in the gas to move towards the outside, thereby increasing the contact probability between the aerosols and the collection liquid and improving the collection efficiency of the device.

[0043] The bottom of the rotating seat 111 is provided with a mating groove 114. The inner wall of the mating groove 114 is provided with gear teeth, which mesh with the drive gear 14. During use, the power unit 13 drives the rotating seat 111 to rotate via the drive gear 14. The collecting pipe 121 is placed on top of the placement seat 113. During the rotation of the rotating seat 111, the collecting pipe 121 is driven to rotate via the placement seat 113. The vortex plates 123 are distributed in a ring array. During the rotation of the collecting pipe 121, the collecting liquid inside comes into contact with the collecting liquid through the vortex plates 123, causing the collecting liquid inside to rotate. During the rotation of the collecting liquid, under the action of centrifugal force, a vortex is generated, causing the area near the center to be concave and the area near the outside to extend upward, thereby increasing the contact area between the collecting liquid and the spiral gas and improving the concentration of the spiral gas. The device reduces the contact probability between aerosols and the collected liquid. Furthermore, when the collected liquid generates a vortex, it covers the vortex plate 123, preventing the vortex plate 123 from contacting the spiral gas and slowing down the gas flow rate. This reduces the contact probability between aerosols and the collected liquid, improving the stability of the device during operation. In addition, compared to traditional devices where the gas drives the collected liquid to rotate, resulting in a large difference in rotational speed between the spiral gas and the collected liquid, causing aerosols to fail to enter the collected liquid due to the large speed difference, the device in this application effectively avoids this problem. When the vortex plate 123 drives the collected liquid to rotate, it increases the circumferential flow speed of the collected liquid, thereby reducing the speed difference between the collected liquid and the spiral gas, allowing aerosols to enter the collected liquid more effectively and improving the collection efficiency of the device.

[0044] The bottom of the contact base 96 is in contact with the collection device 12. A contact sensor 97 is fixedly installed on the bottom of the contact base 96. Since the top of the collection tube 121 is in contact with the bottom of the contact base 96, the liquid level near the outer part of the collection tube 121 continuously rises under the action of rotation until the collection liquid comes into contact with the contact sensor 97 located at the top of the collection tube 121. At this time, the contact sensor 97 will sense the force brought by the contact of the collection liquid. At this time, the output terminal of the contact sensor 97 is connected to the input terminal of the power machine 13 through the signal connection, so that the power machine 13 stops accelerating. At this time, the liquid level depth near the center of the collection tube 121 reaches the maximum, and the liquid level near the outer part reaches the highest, so that the liquid surface area of ​​the collection liquid reaches the maximum. At this time, the contact probability between the collection liquid and the aerosol in the spiral gas also reaches the maximum, so that the collection effect of the device on aerosols reaches the maximum, and the collection efficiency of the device is further improved.

[0045] When the liquid level inside the collection pipe 121 is lower than the top of the trigger sleeve 1241, resulting in excessively low pressure, the spring pushes open the blocking plate 1247, allowing the liquid supply pump to provide the collection liquid. At this time, a pipe is fixedly connected to the bottom of the connecting seat 1244 and is connected to the liquid supply pump, allowing the collection liquid to enter the interior of the trigger sleeve 1241 through the pipe and the flow hole 1243. Since the blocking plate 1247 is in the open state at this time, the collection liquid can enter the cavity inside the trigger sleeve 1241 above the blocking plate 1247 through the switch seat 1246, thereby replenishing the collection liquid. This prevents the collection liquid inside the trigger sleeve 1241 from evaporating under the action of airflow, causing the liquid level to be too high, exposing the top surface of the support plate 122, and directly contacting the spiral gas, which would reduce the collection efficiency. This further improves the operational stability of the device.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sampler for virus collection based on aerosol sampling technology, comprising a shell (1), characterized in that: A filter cover (2) is fixedly installed on the top of the outer shell (1). A mounting base I (3) is fixedly installed on the inner wall of the outer shell (1) near the top. An air supply unit (4) is fixedly installed on the top of the mounting base I (3). An air inlet (5) is fixedly installed on the top of the air supply unit (4) near the outer side. An air guide hole (6) is provided at the center of the top of the air supply unit (4). An air outlet (7) is fixedly installed on the bottom of the air supply unit (4) near the outer side. A mounting base II (8) is fixedly installed on the inner wall of the outer shell (1) below the mounting base I (3). An air guide device (9) is fixedly installed on the top of the mounting base II (8). A socket (10) is fixedly installed near the bottom inside the outer shell (1). A rotating device (11) is movably fitted onto the inner ring of the socket (10). A collecting device (12) is placed on top of the rotating device (11). The collecting device (12) is in contact with the air guiding device (9). A power unit (13) is fixedly installed at the bottom of the inner cavity of the outer shell (1). A drive gear (14) is fixedly installed at one end of the output shaft of the power unit (13). The drive gear (14) meshes with the rotating device (11). A replacement hole (15) is provided on the outer surface of the outer shell (1), and the position of the replacement hole (15) corresponds to that of the collecting device (12). The air guiding device (9) includes an air guiding chamber (91). An annular mounting plate I (92) is fixedly installed on the outer surface of the air guiding chamber (91). The annular mounting plate I (92) is fixedly installed on the top of the mounting base II (8). An acute-angle air inlet (93) is provided on the outer surface of the air guiding chamber (91) above the annular mounting plate I (92). The part of the outer surface of the air guiding chamber (91) below the annular mounting plate I (92) is set as conical. An exhaust nozzle (94) is fixedly installed on the top of the air guiding chamber (91). An air guiding sleeve (95) is fixedly installed at the center of the top of the inner cavity of the air guiding chamber (91). The exhaust nozzle (94) is connected to the air guiding sleeve (95). A contact base (96) is fixedly installed near the bottom of the inner cavity of the air guiding chamber (91). The bottom of the contact base (96) is in contact with the collecting device (12). A contact sensor (97) is fixedly installed on the bottom of the contact base (96).

2. The sampler for virus collection based on aerosol sampling technology according to claim 1, characterized in that: The output of the contact sensor (97) is connected to the input of the power unit (13) via a signal connection.

3. A sampler for virus collection based on aerosol sampling technology according to claim 1, characterized in that: The rotating device (11) includes a rotating base (111), a connecting hole (112) is provided at the center of the top of the rotating base (111), and a placement seat (113) is fixedly installed at the position outside the connecting hole (112) on the top of the rotating base (111). The placement seats (113) are distributed in a ring array. A collecting device (12) is placed on the top of the placement seat (113). A socket groove is provided on the outer surface of the rotating base (111), and the socket groove is sleeved with the socket seat (10). A mating groove (114) is provided at the bottom of the rotating base (111). The inner wall of the mating groove (114) is provided with gear teeth, and the gear teeth mesh with the drive gear (14).

4. A sampler for virus collection based on aerosol sampling technology according to claim 3, characterized in that: The collecting device (12) includes a collecting tube (121) placed on top of a placement seat (113). The top of the collecting tube (121) is in contact with the bottom of a contact base (96). A support plate (122) is fixedly installed on the inner wall of the collecting tube (121). A vortex plate (123) is fixedly installed on the top of the support plate (122) near the outer side. The vortex plates (123) are distributed in a ring array. The vortex plates (123) are fixedly connected to the inner wall of the collecting tube (121). A circular through hole is opened at the center of the top of the support plate (122), and a trigger device (124) is fixedly installed at the bottom of the circular through hole. The trigger device (124) extends to the bottom of the collecting tube (121).

5. A sampler for virus collection based on aerosol sampling technology according to claim 4, characterized in that: The triggering device (124) includes a trigger sleeve (1241). A flow plate (1242) is fixedly installed on the inner wall of the trigger sleeve (1241) near the bottom. A flow hole (1243) is opened on the top of the flow plate (1242). A connecting seat (1244) is fixedly installed on the bottom of the flow plate (1242) outside the flow hole (1243). A spring (1245) is fixedly installed on the top of the flow plate (1242) near the outer side. A switch seat (1246) is fixedly installed inside the trigger sleeve (1241) above the flow plate (1242). A stepped hole is opened on the top of the switch seat (1246), and a blocking plate (1247) is movably installed inside the stepped hole. The top of the spring (1245) is fixedly connected to the blocking plate (1247).

6. A sampler for virus collection based on aerosol sampling technology according to claim 5, characterized in that: The bottom of the connector (1244) is fixedly connected to a pipe, and the pipe is connected to the liquid supply pump.

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