Air purification device for filtering aerosol

Abstract

The air purification device comprises a first shell, a second shell and a third shell which are distributed in sequence, and the adjacent shells are connected in a threaded and inserted mode; the third shell is sleeved with a fixing plate set, and the fixing plate set is installed on a plane. The air purifier further comprises a first filtering mechanism, a second filtering mechanism and a fan which are sequentially distributed, the first filtering mechanism comprises a second electrode plate and a first electrode plate which are arranged inside and outside and is arranged on the inner side of the first shell, and the second filtering mechanism comprises a plurality of filter screens arranged in parallel and is arranged in the second shell. The fan is arranged in the third shell; according to the air purifying device, the first filtering mechanism and the second filtering mechanism are arranged, under the action of the draught fan, air is primarily filtered through the second filtering mechanism, then gas is filtered again through the first filtering mechanism, impurities such as aerosol in the air can be effectively removed, and the air purifying efficiency is correspondingly improved.

Description

Technical Field

[0001] The invention relates to the field of air purification equipment, in particular to an air purification device for filtering aerosols. Background Art

[0002] Aerosol refers to a gaseous dispersion system composed of solid or liquid particles suspended in a gas medium, and its particle size ranges from tens of nanometers to tens of micrometers. These tiny particulate matter comes from a wide range of sources, such as smoke and dust emitted during industrial production, exhaust particles generated by transportation, dust raised by construction, and sand, pollen, microorganisms (such as bacteria, viruses, etc.) in nature, which can all exist in the air in the form of aerosols.

[0003] Therefore, the harm of aerosols should not be underestimated. When inhaled by the human body, they can penetrate deep into the lungs through the respiratory tract, causing a series of health problems, including but not limited to respiratory inflammation, asthma attacks, lung infections, and even the occurrence and development of serious diseases such as cardiovascular disease and lung tumors. Especially in some specific circumstances, such as during epidemics of infectious diseases, aerosols carrying viruses have become one of the important ways for viruses to spread, greatly increasing the risk of disease transmission and seriously threatening public health safety.

[0004] In order to improve the cleanliness of the indoor environment, many devices for gas purification have appeared on the market, such as an air purification filter element and an air purifier disclosed in a Chinese patent with publication number CN117085428A, wherein the air purification filter element comprises: a filter element bracket, an installation cavity is formed on the inner side of the filter element bracket; a first filter screen, the first filter screen is arranged on the filter screen bracket; a filter element assembly, the filter element assembly comprises an inner support frame, a rotating bracket and a filter screen assembly; a third filter screen, the third filter screen is arranged on the filter element bracket; and a transmission assembly, the transmission assembly is arranged on the filter element bracket.

[0005] By using the air purification filter element provided by the above patent, the third filter can be set to allow the air to be filtered for the third time after passing through the first filter and the filter assembly, that is, under the action of the filter, the air is filtered and purified multiple times.

[0006] Although the air purification device provided by the above patent can purify the air, it simply filters the air through a filter. Even if the pore size of the filter is small, when faced with aerosols of different particle sizes, the purification effect needs to be improved, especially aerosols with very small particle sizes, which often slip through the net. Summary of the invention

[0007] The purpose of the present invention is to provide an air purification device for filtering aerosols, aiming to improve the problem that the effect of air purification equipment in removing aerosols needs to be improved.

[0008] The present invention is implemented as follows: an air purification device for filtering aerosols, comprising a first shell, a second shell and a third shell which are distributed in sequence, and the adjacent shells are connected by threaded plug-in; a fixed plate group is sleeved on the third shell, and the fixed plate group is installed on a plane; it also includes a first filter mechanism, a second filter mechanism and a fan which are distributed in sequence, the first filter mechanism comprises a second electrode plate and a first electrode plate which are arranged inside and outside, and are arranged on the inner side of the first shell, the second filter mechanism comprises a plurality of filter nets which are arranged in parallel, and are arranged in the second shell, and the fan is arranged in the third shell.

[0009] Preferably, a support frame is provided at the filtering mechanism, and the support frame includes a double-layer ring plate, a third ring baffle plate and a fourth ring baffle plate, the third ring baffle plate and the fourth ring baffle plate are arranged at the same end of the second electrode plate and the first electrode plate, and the double-layer ring plate is arranged at the other end of the second electrode plate and the first electrode plate, and the third ring baffle plate and the fourth ring baffle plate are connected to the double-layer ring plate by screws.

[0010] Preferably, a first slot and a second slot are provided on the side wall of the double-layer ring plate, and the ends of the second electrode plate and the first electrode plate are respectively inserted into the second slot and the first slot; the fourth annular baffle is arranged as a stepped structure and is arranged to fit the end of the second electrode plate.

[0011] Preferably, the outer diameter of the fourth annular baffle is smaller than or equal to the outer diameter of the second electrode plate, and the inner diameter of the third annular baffle is larger than or equal to the inner diameter of the first electrode plate; a blocking plate is detachably provided in the middle of the double-layer annular plate.

[0012] Preferably, a cleaning mechanism is provided between the second electrode plate and the first electrode plate, the cleaning mechanism comprising an outer cleaning plate and an inner cleaning plate, the outer wall of the outer cleaning plate is in sliding contact with the inner wall of the first electrode plate, and the inner wall of the inner cleaning plate is in sliding contact with the outer wall of the second electrode plate; an adjusting threaded rod is threadedly provided on the connecting plate of the outer cleaning plate and the inner cleaning plate, and the end of the adjusting threaded rod is inserted into the support frame through a bearing connection.

[0013] Preferably, a first internal thread structure is provided at one end of the inner wall of the first shell away from the second shell, and a grid is threadedly connected at the first internal thread structure; a first annular baffle is provided at one end of the inner side of the first shell close to the second shell, and the double-layer ring plate is in contact with the first annular baffle.

[0014] Preferably, a first grid frame and a second grid frame are respectively provided on both sides of each filter screen, and an insertion rod and a slot are respectively provided on the side where the first grid frame and the second grid frame are close to each other, and the insertion rod is inserted into the slot; the second filter mechanism also includes a support frame, and the support frame includes a plurality of fixedly connected frame bodies, and an annular groove is provided on the inner side of each frame body, and an inlet and outlet hole is provided on the top, and the inlet and outlet hole is communicated with the annular groove, and the edge of the spliced ​​first grid frame and the second grid frame extends into the annular groove.

[0015] Preferably, a second internal thread structure is provided on one end of the inner side of the second shell adjacent to the first shell, and a second annular baffle is provided on the other end, an extrusion ring plate is threadedly installed at the second internal thread structure, and the second filtering mechanism is arranged between the second annular baffle and the extrusion ring plate; a first external threaded pipe is provided at one end of the first shell, and the first external threaded pipe is threadedly inserted into the second internal thread structure.

[0016] Preferably, the fixing plate assembly comprises a main body and a clamping ring plate, the main body is arranged as a T-shaped structure and is arranged to penetrate the mounting plane; the clamping ring plate is threadedly connected and sleeved at the end of the main body.

[0017] Preferably, a plurality of studs are fixedly provided on the side wall of the clamping ring plate, a plurality of ear plates are fixedly provided on the outer side of the third shell, and the ear plates are extruded and sleeved on the studs through nuts.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention is provided with a first filtering mechanism and a second filtering mechanism. Under the action of the fan, the air is first filtered by the second filtering mechanism, and then filtered again by the first filtering mechanism, so as to effectively remove impurities such as aerosols in the air, and correspondingly improve the air purification efficiency.

[0020] 2. The first shell, the second shell, and the third shell of the utility model are connected by threads at the end, so that a shell can be disassembled according to needs, and then the components located in the shell can be repaired or replaced, avoiding the need to disassemble the entire device for repairing or replacing a certain component.

[0021] 3. The present invention is provided with a cleaning mechanism, which can realize the synchronous cleaning of the second electrode plate and the first electrode plate under the cooperation of the inner cleaning plate and the outer cleaning plate, so as to avoid the accumulation of a large number of impurities on the second electrode plate and the first electrode plate to affect the purification of the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a first structural schematic diagram of the present invention as a whole;

[0023] Figure 2 It is a second structural schematic diagram of the present invention as a whole;

[0024] Figure 3 It is a structural schematic diagram of the first housing and the first filtering mechanism of the present invention;

[0025] Figure 4 is a schematic structural diagram of the first shell of the present invention;

[0026] Figure 5 is a structural schematic diagram of the first filtering mechanism of the present invention;

[0027] Figure 6 is a first structural schematic diagram of the support frame of the present invention;

[0028] Figure 7 is a second structural schematic diagram of the support frame of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the cleaning mechanism of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the second housing and the second filtering mechanism of the present invention;

[0031] Fig.10 is a schematic structural diagram of the second shell of the present invention;

[0032] Fig.11 is a schematic structural diagram of the second filtering mechanism of the present invention;

[0033] Fig.12 It is a structural schematic diagram of the support frame of the present invention;

[0034] Fig.13 It is a schematic diagram of the structure of the filter screen of the present invention;

[0035] Fig.14 is a schematic structural diagram of the third housing of the present invention;

[0036] Fig.15 It is a structural schematic diagram of the fixed plate group of the present invention.

[0037] In the figure: 1, first shell; 11, control box; 12, first internal thread structure; 13, first annular baffle; 14, first external thread pipe; 15, grid; 2, second shell; 21, second annular baffle; 22, extrusion ring plate; 23, polygonal hole; 24, second internal thread structure; 3, third shell; 31, ear plate; 4, fixed plate group; 41, main body; 42, clamping ring plate; 43, stud; 5, first filtering mechanism; 51, first electrode plate; 52, second Electrode plate; 6. Second filtering mechanism; 61. Support frame; 611. Annular groove; 612. Inlet and outlet hole; 62. Filter screen; 621. First grid; 622. Second grid; 7. Fan; 8. Support frame; 81. Third annular baffle plate; 82. Fourth annular baffle plate; 83. Screw; 84. Double-layer ring plate; 85. First slot; 86. Second slot; 87. Blocking plate; 9. Cleaning mechanism; 91. External cleaning plate; 92. Internal cleaning plate; 93. Adjusting threaded rod. DETAILED DESCRIPTION

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0040] Example 1

[0041] In order to improve the efficiency of removing aerosols during air purification, the present embodiment provides a new air purification device, which can filter the gas again through an electrostatic field after removing impurities such as aerosols through a filter, thereby effectively removing impurities such as aerosols.

[0042] like Figure 1 , Figure 2As shown, specifically, the air purification device includes a first housing 1, a second housing 2, a third housing 3, a fixed plate group 4, a first filter mechanism 5, a second filter mechanism 6, a fan 7, etc. The first housing 1, the second housing 2, and the third housing 3 are all configured as cylindrical structures, and are connected end to end by threads and can be detachably connected. At the same time, the first filter mechanism 5, the second filter mechanism 6, and the fan 7 are respectively arranged in the first housing 1, the second housing 2, and the third housing 3, and then the first filter mechanism 5, the second filter mechanism 6, and the fan 7 are located on the same gas channel under the action of the housing, so that after the external gas is pumped into the gas channel under the action of the fan 7, the gas passes through the second filter mechanism 6 and the first filter mechanism 5 in sequence, and then multiple filtering treatments of the gas are realized under the cooperation of the second filter mechanism 6 and the first filter mechanism 5. In order to enable the device to be installed stably and facilitate the transportation of outdoor gas to indoor space, a fixing plate group 4 is sleeved on the third shell 3. The fixing plate group 4 is penetrated on the window glass or penetrated on the vertical wall. Then, under the action of the fixing plate group 4, the device is stably penetrated through the installation plane and facilitates the disassembly of the device according to needs.

[0043] like Fig.14 , Fig.15 As shown, in order to enable the device to be stably installed, the fixing plate group 4 includes a main body 41 and a clamping ring plate 42. The main body 41 is arranged as a T-shaped structure and is arranged to penetrate the installation plane. The clamping ring plate 42 is threadedly connected and sleeved on the end of the main body 41, and is distributed on both sides of the installation plane with the end of the main body 41. Therefore, when the clamping ring plate 42 is rotated, the clamping ring plate 42 and the main body 41 can be forced to be stably clamped and installed on the plane.

[0044] In addition, a plurality of studs 43 are fixedly arranged on the side wall of the clamping ring plate 42, and a plurality of ear plates 31 are fixedly arranged on the outer side of the third housing 3. When the third housing 3 is arranged through the main body 41, the ear plates 31 are sleeved on the studs 43, and nuts are threadedly sleeved on the ends of the studs 43, so that the ear plates 31 can be stably sleeved on the studs 43 under the action of the nuts.

[0045] like Figure 4 , Fig.10 , 14 As shown, in order to realize the detachable connection between the first shell 1, the second shell 2, and the third shell 3, so that the first filter mechanism 5, the second filter mechanism 6, and the fan 7 can be disassembled as needed for cleaning or replacement, a first external threaded tube 14 and a second internal threaded structure 24 are respectively provided at the ends of the first shell 1 and the second shell 2 close to each other, and the first external threaded tube 14 is threadedly inserted into the second internal threaded structure 24, thereby realizing a stable connection between the first shell 1 and the second shell 2.

[0046] A second externally threaded tube and a third internally threaded structure can be respectively arranged on the ends of the second shell 2 and the third shell 3 that are close to each other. The second externally threaded tube is threadedly installed at the third internally threaded structure. Therefore, the cooperation of the second externally threaded tube and the third internally threaded structure enables the second shell 2 and the third shell 3 to be stably connected.

[0047] like Figure 4 , Fig.10 As shown, in order to stably install the first filter mechanism 5 in the first shell 1, a first annular baffle 13 is provided at one end of the inner side of the first shell 1 close to the second shell 2, and a first internal thread structure 12 is provided at the other end. A grid 15 is threadedly connected to the first internal thread structure 12, and the first filter mechanism 5 is arranged between the grid 15 and the first annular baffle 13, and rotating the grid 15 can force the first filter mechanism 5 to be stably installed.

[0048] In order to ensure that the second filter mechanism 6 is stably installed in the second shell 2, a second annular baffle 21 is provided at one end of the inner side of the second shell 2 away from the first shell 1, and an extrusion ring plate 22 is threadedly installed at the second internal thread structure 24, and a polygonal hole 23 is provided in the middle of the extrusion ring plate 22. The second filter mechanism 6 is arranged between the second annular baffle 21 and the extrusion ring plate 22, and the second filter mechanism 6 is forced to be stably installed by rotating the extrusion ring plate 22.

[0049] like Figure 11-13 As shown, in order to achieve preliminary filtration of the gas, the second filter mechanism 6 includes a plurality of filter screens 62 arranged in parallel. The filter screens 62 can be set as HEPA filters, electrostatic nano-silver disinfection filters, etc. Therefore, under the action of the filter screens 62, impurities in the air can be preliminarily removed, and even disinfection can be achieved.

[0050] In order to ensure the stable installation of HEPA filters, etc., a first grid frame 621 and a second grid frame 622 are respectively provided on both sides of each filter 62, and an insertion rod and a slot are respectively provided on the side where the first grid frame 621 and the second grid frame 622 are close to each other. The insertion rod is inserted into the slot so that the first grid frame 621 and the second grid frame 622 are stably spliced ​​and connected. Therefore, the filter can be stably placed with the cooperation of the first grid frame 621 and the second grid frame 622 to support it.

[0051] In addition, the second filter mechanism 6 also includes a support frame 61, which includes a plurality of fixedly connected frames, each of which is provided with an annular groove 611 on the inner side and an inlet and outlet hole 612 on the top, and the inlet and outlet hole 612 is communicated with the annular groove 611. Therefore, the spliced ​​first grid 621 and the second grid 622 can be installed in each frame through the inlet and outlet hole 612, and the edge extends into the annular groove 611, so that the filter net 62 can be stably installed, and support can be provided for disassembling the filter net 62 for replacement or cleaning as needed.

[0052] like Figure 5-7 As shown, in order to achieve secondary filtration treatment of the gas, the first filtration mechanism 5 includes a second electrode plate 52, a first electrode plate 51, etc. The second electrode plate 52 and the first electrode plate 51 are distributed inside and outside, and are connected to a high-voltage generator through a wire. The high-voltage generator generates a sufficiently high DC voltage, and a strong electrostatic field is established between the electrodes, which causes the aerosol particles to be charged and drives them to move in a directional manner.

[0053] In order to stably install the second electrode plate 52 and the first electrode plate 51, the second electrode plate 52 and the first electrode plate 51 can be directly connected to the first shell 1, or can be installed on the support frame 8, so that the support frame 8 is connected to the first shell 1. Specifically, the support frame 8 includes a double-layer ring plate 84, a third annular baffle plate 81 and a fourth annular baffle plate 82. A first slot 85 and a second slot 86 are provided on the side wall of the double-layer ring plate 84, and the ends of the second electrode plate 52 and the first electrode plate 51 are inserted into the second slot 86 and the first slot 85 respectively. The third annular baffle plate 81 and the fourth annular baffle plate 82 are arranged at the other end of the second electrode plate 52 and the first electrode plate 51, and are connected to the double-layer ring plate 84 through a screw 83. At the same time, the fourth annular baffle plate 82 is set to a stepped structure, so that the end of the second electrode plate 52 is arranged to fit the end of the second electrode plate 52, thereby limiting the stable installation of the second electrode plate 52 and the first electrode plate 51. A blocking plate 87 is detachably provided in the middle of the double-layer ring plate 84 to prevent the gas from moving from the inner side of the second electrode plate 52 and affecting the filtering process of the gas.

[0054] In order to be able to control this work, a control box 11 is arranged below the first housing 1, and a programmable logic controller (PLC) or a microcontroller (MCU), a power module, a relay, a fuse, an interface, etc. are arranged in the control box 11, and operation buttons and indicator lights, etc. are arranged on the outer surface, and the high-voltage generator is arranged in the control box 11. The appropriate voltage circuit output by the power module of the control box is first connected in series to the fuse, then connected to the relay, and then connected to the fan 7, so as to control the operation of the fan 7. The digital output port of the PLC or MCU can also be directly connected to the control coil of the relay. The voltage circuit output by the power module of the control box suitable for the operation of the high-voltage generator is first connected to the fuse for overcurrent protection, then connected to the relay, and then connected to the power input port of the high-voltage generator, etc.

[0055] Example 2

[0056] like Figure 7As shown, on the basis of Example 1, in order to achieve the cleaning of the second electrode plate 52 and the first electrode plate 51, a cleaning mechanism 9 is arranged between the second electrode plate 52 and the first electrode plate 51, and the cleaning mechanism 9 is arranged at one end of the electrode plate adjacent to the second shell 2, and can be moved under the action of external force. Therefore, when the device is suspended, the particles adhering to the electrode plate can be detached during the movement of the cleaning mechanism 9.

[0057] Specifically, the cleaning mechanism 9 includes an outer cleaning plate 91 and an inner cleaning plate 92. The outer wall of the outer cleaning plate 91 is in sliding contact with the inner wall of the first electrode plate 51, and the inner wall of the inner cleaning plate 92 is in sliding contact with the outer wall of the second electrode plate 52. The second electrode plate 52 and the first electrode plate 51 can be cleaned synchronously by the cooperation of the outer cleaning plate 91 and the inner cleaning plate 92.

[0058] In order to control the movement of the outer cleaning plate 91 and the inner cleaning plate 92, an adjusting threaded rod 93 is threadedly provided on the connecting plate of the outer cleaning plate 91 and the inner cleaning plate 92, and the end of the adjusting threaded rod 93 is inserted into the support frame 8 through a bearing connection, or connected to the first shell 1, so that the outer cleaning plate 91 and the inner cleaning plate 92 can be controlled to move synchronously by rotating the adjusting threaded rod 93 to achieve the cleaning of the electrode plate.

[0059] In order to remove adhered impurities through the outer cleaning plate 91 and the inner cleaning plate 92, the outer diameter of the fourth annular baffle plate 82 is less than or equal to the outer diameter of the second electrode plate 52, and the inner diameter of the third annular baffle plate 81 is greater than or equal to the inner diameter of the first electrode plate 51.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air purification device for filtering aerosols, characterized in that: The invention comprises a first shell (1), a second shell (2) and a third shell (3) which are arranged in sequence, and the adjacent shells are connected by threaded plug-in connection; a fixing plate group (4) is sleeved on the third shell (3), and the fixing plate group (4) is installed on a plane; the invention also comprises a first filter mechanism (5), a second filter mechanism (6) and a fan (7) which are arranged in sequence, the first filter mechanism (5) comprising a second electrode plate (52) and a first electrode plate (51) which are arranged inside and outside, and is arranged on the inner side of the first shell (1); the second filter mechanism (6) comprises a plurality of filter screens (62) which are arranged in parallel, and is arranged in the second shell (2); the fan (7) is arranged in the third shell (3).

2. An air purification device for filtering aerosols according to claim 1, characterized in that: A support frame (8) is arranged at the first filtering mechanism (5), and the support frame (8) comprises a double-layer ring plate (84), a third ring baffle plate (81) and a fourth ring baffle plate (82), wherein the third ring baffle plate (81) and the fourth ring baffle plate (82) are arranged at the same end of the second electrode plate (52) and the first electrode plate (51), and the double-layer ring plate (84) is arranged at the other end of the second electrode plate (52) and the first electrode plate (51), and the third ring baffle plate (81) and the fourth ring baffle plate (82) are connected to the double-layer ring plate (84) via a screw (83).

3. The air purification device for filtering aerosol according to claim 2, characterized in that: A first slot (85) and a second slot (86) are provided on the side wall of the double-layer ring plate (84), and the ends of the second electrode plate (52) and the first electrode plate (51) are respectively inserted into the second slot (86) and the first slot (85); the fourth annular baffle plate (82) is arranged in a stepped structure and is arranged to fit the end of the second electrode plate (52).

4. The air purification device for filtering aerosol according to claim 3, characterized in that: The outer diameter of the fourth annular baffle (82) is smaller than or equal to the outer diameter of the second electrode plate (52), and the inner diameter of the third annular baffle (81) is larger than or equal to the inner diameter of the first electrode plate (51); a blocking plate (87) is detachably provided in the middle of the double-layer annular plate (84).

5. The air purification device for filtering aerosol according to claim 2, characterized in that: A cleaning mechanism (9) is provided between the second electrode plate (52) and the first electrode plate (51), the cleaning mechanism (9) comprising an outer cleaning plate (91) and an inner cleaning plate (92), the outer wall of the outer cleaning plate (91) being in sliding contact with the inner wall of the first electrode plate (51), and the inner wall of the inner cleaning plate (92) being in sliding contact with the outer wall of the second electrode plate (52); an adjusting threaded rod (93) is threadedly provided on the connecting plate between the outer cleaning plate (91) and the inner cleaning plate (92), and the end of the adjusting threaded rod (93) is connected and inserted into the support frame (8) through a bearing connection.

6. The air purification device for filtering aerosol according to claim 5, characterized in that: A first internal thread structure (12) is provided at one end of the inner wall of the first shell (1) away from the second shell (2), and a grid (15) is threadedly connected to the first internal thread structure (12); a first annular baffle plate (13) is provided at one end of the inner side of the first shell (1) close to the second shell (2), and the double-layer ring plate (84) is in contact with the first annular baffle plate (13).

7. The air purification device for filtering aerosol according to claim 1, characterized in that: A first grid (621) and a second grid (622) are respectively arranged on both sides of the filter net (62), and an insertion rod and a slot are respectively arranged on the side where the first grid (621) and the second grid (622) are close to each other, and the insertion rod is inserted into the slot; the second filtering mechanism (6) also includes a support frame (61), and the support frame (61) includes a plurality of fixedly connected frame bodies, and an annular groove (611) is arranged on the inner side of each frame body, and an inlet and outlet hole (612) is arranged on the top, and the inlet and outlet hole (612) is arranged in communication with the annular groove (611), and the edges of the spliced ​​first grid (621) and the second grid (622) extend into the annular groove (611).

8. The air purification device for filtering aerosols according to claim 7, characterized in that: A second internal thread structure (24) is provided at one end of the inner side of the second shell (2) adjacent to the first shell (1), and a second annular baffle (21) is provided at the other end; an extrusion ring plate (22) is threadedly mounted at the second internal thread structure (24), and the second filtering mechanism (6) is arranged between the second annular baffle (21) and the extrusion ring plate (22); a first external thread tube (14) is provided at one end of the first shell (1), and the first external thread tube (14) is threadedly inserted into the second internal thread structure (24).

9. The air purification device for filtering aerosol according to claim 1, characterized in that: The fixing plate assembly (4) comprises a main body (41) and a clamping ring plate (42); the main body (41) is arranged in a T-shaped structure and is arranged to penetrate the installation plane; the clamping ring plate (42) is threadedly connected and sleeved on the end of the main body (41).

10. An air purification device for filtering aerosols according to claim 9, characterized in that: A plurality of studs (43) are fixedly arranged on the side wall of the clamping ring plate (42), and a plurality of ear plates (31) are fixedly arranged on the outer side of the third shell (3). The ear plates (31) are pressed and sleeved on the studs (43) by nuts.

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