Energy-saving air purification device for building

Abstract

The invention discloses an energy-saving air purification device for a building, and relates to the technical field of air purification equipment. The connecting table is fixed on the base; the bearing connecting surface is fixed on the connecting table, and a bearing ring surface is arranged on the inner side; the multiple air inlet devices are annularly distributed and fixed to the bearing connecting face; the filtering assembly is arranged in the middle of the air inlet device; the cleaning device is arranged corresponding to the air inlet device, and the cleaning device is located above the bearing ring surface; the protective shell is arranged on the outer side of the air inlet device; the collecting and guiding device is arranged in the middle of the connecting table, the bottom is fixedly connected with the base, and the top is connected with the cleaning device; and the exhaust device is fixed at the center of the top of the plurality of air inlet devices and is fixedly connected with the filter assembly. According to the air purification device, the filtering layer can be automatically replaced to ensure continuous purification of indoor air, the surface layer of the filtering arc net is simply cleaned in the purification process, and the working efficiency of the air purification device is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification equipment, and more specifically, to an energy-saving air purification device for buildings. Background Art

[0002] In the process of building decoration, various plates, facing materials, etc. will release harmful substances such as formaldehyde, benzene, toluene, and particulate matter. Due to the relatively closed environment of the decoration project, indoor workers will inhale a large amount of dust particles or harmful substances when working, and long-term exposure to such an environment will cause great harm to the health of the workers. Therefore, in the process of building decoration, it is particularly important to equip an air purification device to filter impurities in the air. Although the existing air purification device can purify the air to a certain extent, it still has some shortcomings when used in building decoration projects. Many air purification devices require personnel to regularly replace the internal filter layer after using it for a certain period of time to ensure the air purification effect. However, the process of replacing the filter layer is often cumbersome. If it is not replaced in time, it is difficult to continuously purify the indoor air. In addition, due to the presence of a large number of floating particles during the decoration process, the external filter layer of the air purifier is easily clogged due to the attachment of a large number of particles during the air passing process, and the filter layer needs to be replaced manually or cleaned, which not only increases the maintenance cost, but also reduces the work efficiency. Therefore, it is necessary to provide an energy-saving air purification device for building to solve the problems raised in the above background technology. Summary of the invention

[0003] To achieve the above object, the present invention provides the following technical solution: an energy-saving air purification device for buildings, comprising:

[0004] Base;

[0005] A connecting platform, fixed on the base;

[0006] The bearing connection surface is fixed on the connection platform, and a bearing annular surface is provided on the inner side of the bearing connection surface;

[0007] Air inlet devices, a plurality of which are arranged in an annular distribution and fixed on the bearing connection surface;

[0008] A filter assembly is arranged in the middle of the air inlet device;

[0009] A plurality of cleaning devices are provided in an annular distribution and are arranged corresponding to the air inlet device, and the cleaning devices are located above the bearing annular surface;

[0010] A protective housing is arranged on the outside of the air inlet device;

[0011] The collecting and guiding device is arranged in the middle of the connecting platform, the bottom is fixedly connected to the base, and the top is connected to the cleaning device;

[0012] The exhaust device is fixed at the top center of the plurality of air inlet devices, and the exhaust device is fixedly connected to the filter assembly.

[0013] Further, as a preference, the air inlet device comprises:

[0014] A plurality of connecting frames are provided in an annular distribution and fixed on the bearing connection surface;

[0015] A plurality of upper partition plates are provided in an annular distribution and are arranged in the connection frame, and the number of the upper partition plates is twice that of the connection frame, and the upper partition plates are fitted with the outer wall of the filter assembly;

[0016] An air inlet is arranged at positions corresponding to two upper partition plates corresponding to the same connecting frame, and the air inlet is fixedly connected to the connecting frame;

[0017] The fan is fixed at the air inlet.

[0018] Further, as a preference, the filter assembly comprises:

[0019] A plurality of filter arc nets are provided in an annular distribution and are arranged obliquely, and the number of the filter arc nets is twice that of the air inlet, and the filter arc nets are arranged at intervals from the upper partition plate;

[0020] A filter screen surface is fixed at the bottom of the filter arc screen, and the filter screen surface is connected to the collecting and guiding device;

[0021] The ultraviolet lamp is arranged at the center of the filter arc net and is fixedly connected to the filter net surface.

[0022] Further, as a preference, the cleaning device comprises:

[0023] A plurality of lifting arc blocks are provided in an annular distribution, corresponding to the connection frame, and arranged on the top of the collecting and guiding device, and the lifting arc blocks are arranged on the outside of the filtering arc net, and there is a gap between the lifting arc blocks and the filtering arc net;

[0024] The load-bearing arc surface is fixed on the outer side of the lifting arc block, and the load-bearing arc surface is located directly above the load-bearing annular surface;

[0025] A driving assembly is arranged on the bearing arc surface and connected to the outer side of the lifting arc block;

[0026] The cleaning component is slidably arranged on the lifting arc block and is connected to the inner side of the driving component.

[0027] Further, as a preference, the driving assembly comprises:

[0028] A driving gear is arranged on the load-bearing arc surface and meshes with the outer side of the lifting arc block;

[0029] The control body is arranged above the driving gear, and the bottom of the control body is fixedly connected to the top center of the driving gear through an axle. An elastic connector is provided on the side of the control body facing the cleaning component, and the elastic connector is fixedly connected to the cleaning component.

[0030] Further, as a preference, the cleaning component comprises:

[0031] A sliding block, which is slidably arranged on the top of the lifting arc block;

[0032] A connector, the bottom of which is slidably connected to the sliding block, and the side of which is fixedly connected to the elastic connector on the control body;

[0033] A plurality of cleaning brushes are distributed along the connecting body and are arranged on one side of the connecting body close to the filter arc net.

[0034] Further, as a preference, the collecting and guiding device comprises:

[0035] A supporting cylinder is arranged inside the connecting platform, the bottom of which is fixedly connected to the base, and a lifting mechanism is arranged on the top of the supporting cylinder, and the supporting cylinder is connected to the lifting arc block through the lifting mechanism;

[0036] A fixed bottom plate is fixed in the supporting cylinder and is located below the filter screen surface;

[0037] The filter screen body is in an inverted cone shape, with the bottom fixed to the fixed bottom plate and the top rotatably connected to the filter screen surface;

[0038] The lower partition plate is arranged corresponding to the upper partition plate, fixed on the fixed bottom plate, and located between the filter screen body and the supporting cylinder;

[0039] A driving motor is fixed to the bottom of the fixed base plate;

[0040] One end of the rotating shaft is fixedly connected to the driving motor, and the other end passes through the fixed bottom plate and is fixedly connected to the bottom center of the filter screen surface.

[0041] Further, as a preference, the exhaust device comprises:

[0042] The exhaust port is fixed at the top center of the filter assembly;

[0043] The distribution paddle wheel is rotatably arranged at the center of the exhaust outlet.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] In the present invention, the external air is filtered step by step through the setting of the filter assembly, and the air is transported under the guidance of multiple inclined filter arc nets and the air inlet device, which is helpful to disperse and intercept particulate matter in the air, and the multiple filter arc nets can be switched in position under the drive of the rotating shaft, and the filter layer is automatically replaced to ensure continuous purification of the indoor air; through the setting of the cleaning device, the surface layer of the filter arc net is simply cleaned to prevent excessive particulate matter from adhering to the surface of the filter arc net and affecting the working efficiency of the air purification device; through the setting of the collecting and guiding device, the cleaned and fallen particulate matter is collected with the help of the airflow of the air inlet device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of an energy-saving air purification device for buildings;

[0047] Figure 2 is a structural schematic diagram of an air inlet device;

[0048] Figure 3 It is a schematic diagram of the structure of the filter assembly and the cleaning device;

[0049] Figure 4 It is a schematic diagram of the structure of the driving component and the cleaning component;

[0050] Figure 5 It is a schematic diagram of the structure of the collection and guidance device;

[0051] In the figure: 1. base; 2. connecting platform; 3. bearing connecting surface; 4. air inlet device; 5. filter assembly; 6. cleaning device; 7. protective shell; 8. collecting and guiding device; 9. exhaust device; 31. bearing annular surface; 41. connecting frame; 42. upper partition plate; 43. air inlet; 44. fan; 51. filter arc net; 52. filter mesh surface; 53. ultraviolet lamp; 61. lifting arc block; 62. bearing arc surface; 63. driving assembly; 64. cleaning assembly; 81. supporting cylinder; 82. fixed bottom plate; 83. filter mesh body; 84. lower partition plate; 85. driving motor; 86. rotating shaft; 91. exhaust port; 92. distribution paddle wheel; 631. driving gear; 632. control body; 641. sliding block; 642. connecting body; 643. cleaning brush. DETAILED DESCRIPTION

[0052] See also Figure 1 to Figure 5 In an embodiment of the present invention, an energy-saving air purification device for a building includes:

[0053] Base 1;

[0054] A connecting platform 2 is fixed on the base 1;

[0055] The bearing connection surface 3 is fixed on the connection platform 2, and a bearing annular surface 31 is provided on the inner side of the bearing connection surface 3;

[0056] A plurality of air inlet devices 4 are provided in an annular distribution and fixed on the bearing connection surface 3;

[0057] The filter assembly 5 is arranged in the middle of the air inlet device 4;

[0058] A plurality of cleaning devices 6 are provided in an annular distribution and are arranged corresponding to the air inlet device 4, and the cleaning devices 6 are located above the bearing annular surface 31;

[0059] A protective shell 7 is arranged on the outside of the air inlet device 4;

[0060] The collecting and guiding device 8 is arranged in the middle of the connecting platform 2, the bottom is fixedly connected to the base 1, and the top is connected to the cleaning device 6;

[0061] The exhaust device 9 is fixed at the top center of the plurality of air inlet devices 4 , and the exhaust device 9 is fixedly connected to the filter assembly 5 .

[0062] In this embodiment, the air inlet device 4 includes:

[0063] A plurality of connecting frames 41 are provided in an annular distribution and fixed on the bearing connection surface 3;

[0064] A plurality of upper partition plates 42 are provided in an annular distribution and are arranged in the connecting frame 41. The number of the upper partition plates 42 is twice the number of the connecting frame 41. The upper partition plates 42 are fitted with the outer wall of the filter assembly 5.

[0065] The air inlet 43 is arranged at positions corresponding to the two upper partition plates 42 corresponding to the same connecting frame 41, and the air inlet 43 is fixedly connected to the connecting frame 41;

[0066] The fan 44 is fixed at the air inlet 43 .

[0067] That is to say, multiple connecting frames 41 are distributed on the outside of the filter assembly 5 to form a closed air purification device body. Under the action of the fan 44, the external air enters the space isolated by the upper partition plate 42 in the connecting frame 41 through the air inlet 43, and then rises after being filtered by the filter assembly 5 and is discharged from the exhaust device 9.

[0068] In this embodiment, the filtering component 5 includes:

[0069] A plurality of filter arc nets 51 are provided in an annular distribution and are arranged obliquely, and the number of the filter arc nets 51 is twice the number of the air inlets 43, and the filter arc nets 51 are spaced apart from the upper partition plate 42;

[0070] The filter mesh surface 52 is fixed to the bottom of the filter arc mesh 51, and the filter mesh surface 52 is connected to the collecting and guiding device 8;

[0071] The ultraviolet lamp 53 is disposed at the center of the filter arc net 51 and is fixedly connected to the filter net surface 52 .

[0072] That is to say, under the action of multiple upper partition plates 42, the spaced filter arc nets 51 correspond to the air inlets 43 respectively. Under the continuous operation of the air inlet device 4, the air is filtered by the filter arc nets 51, sterilized and disinfected under the action of the ultraviolet lamp 53, and then discharged through the exhaust device 9. When the air purification device has been working for a long time, the filter arc nets 51 corresponding to the air inlet 43 are difficult to play an effective filtering effect. At this time, the filter assembly 5 is driven to rotate by the collecting and guiding device 8, and the adjacent filter arc nets 51 are rotated to the position corresponding to the air inlet 43. The indoor air is continuously purified by replacing the filter arc nets 51.

[0073] In this embodiment, the cleaning device 6 comprises:

[0074] A plurality of lifting arc blocks 61 are provided in an annular distribution, corresponding to the connecting frame 41, and are arranged on the top of the collecting and guiding device 8, and the lifting arc blocks 61 are arranged on the outside of the filtering arc net 51, and there is a gap between the lifting arc blocks 61 and the filtering arc net 51;

[0075] The load-bearing arc surface 62 is fixed on the outer side of the lifting arc block 61, and the load-bearing arc surface 62 is located directly above the load-bearing annular surface 31;

[0076] The driving assembly 63 is disposed on the bearing arc surface 62 and connected to the outer side of the lifting arc block 61;

[0077] The cleaning assembly 64 is slidably disposed on the lifting arc block 61 and is connected to the inner side of the driving assembly 63 .

[0078] That is to say, driven by the lifting arc block 61, the driving component 63 and the cleaning component 64 are driven to move up and down through the bearing arc surface 62 to clean the positions of different heights of the filter arc net 51, and driven by the driving component 63, the cleaning component 64 is driven to slide on the lifting arc block 61 to clean back and forth at different positions of the same height on the filter arc net 51. The cleaned dust particles, driven by the air, fall into the collection and guiding device 8 through the gap between the lifting arc block 61 and the filter arc net 51 for centralized treatment. Under the action of the cleaning component 64, the problem of low air purification efficiency caused by the accumulation of particles on the outside of the filter arc net 51 is effectively prevented, and the purification efficiency of the filter component 5 is effectively improved.

[0079] In this embodiment, the driving assembly 63 includes:

[0080] The driving gear 631 is disposed on the bearing arc surface 62 and meshes with the outer side of the lifting arc block 61;

[0081] The control body 632 is arranged above the driving gear 631, and the bottom of the control body 632 is fixedly connected to the top center of the driving gear 631 through an axis. The side of the control body 632 facing the cleaning component 64 is provided with an elastic connecting piece, and the elastic connecting piece is fixedly connected to the cleaning component 64.

[0082] That is to say, under the action of the control body 632, the driving gear 631 is controlled to rotate on the lifting arc block 61, and then the cleaning component 64 is driven by the driving gear 631 to slide on the lifting arc block 61 to clean different positions at the same height on the filter arc net 51.

[0083] In this embodiment, the cleaning component 64 includes:

[0084] A sliding block 641 is slidably disposed on the top of the lifting arc block 61;

[0085] The connecting body 642 is slidably connected to the sliding block 641 at the bottom and fixedly connected to the elastic connecting piece on the control body 632 at the side;

[0086] A plurality of cleaning brushes 643 are distributed along the connecting body 642 and are disposed on one side of the connecting body 642 close to the filter arc net 51 .

[0087] That is to say, when the lifting arc block 61 drives the cleaning component 64 to move upward, the distance between the connecting body 642 and the filter arc net 51 becomes larger, and then under the action of the elastic connecting piece on the side of the control body 632, the connecting body 642 is pushed in the direction of the filter arc net 51, so that the cleaning brush 643 fits with the filter arc net 51, so that the cleaning brush 643 can clean the filter arc net 51; when the lifting arc block 61 drives the cleaning component 64 to move downward, the distance between the connecting body 642 and the filter arc net 51 becomes smaller, and due to the squeezing restriction of the filter arc net 51, the elastic connecting piece on the side of the control body 632 pulls the connecting body 642 back, keeping the cleaning brush 643 and the filter arc net 51 in a fit state, so that the cleaning brush 643 can clean the filter arc net 51.

[0088] In this embodiment, the collecting and guiding device 8 comprises:

[0089] The support cylinder 81 is arranged inside the connecting platform 2, the bottom is fixedly connected to the base 1, and the top of the support cylinder 81 is provided with a lifting mechanism, and the support cylinder 81 is connected to the lifting arc block 61 through the lifting mechanism;

[0090] A fixed bottom plate 82 is fixed in the supporting cylinder 81 and is located below the filter screen surface 52;

[0091] The filter screen body 83 is in an inverted cone shape, with the bottom fixed on the fixed bottom plate 82 and the top rotatably connected to the filter screen surface 52;

[0092] The lower partition plate 84 is provided corresponding to the upper partition plate 42, fixed on the fixed bottom plate 82, and located between the filter screen body 83 and the supporting cylinder 81;

[0093] A driving motor 85 is fixed to the bottom of the fixed base plate 82;

[0094] One end of the rotating shaft 86 is fixedly connected to the driving motor 85 , and the other end passes through the fixed bottom plate 82 and is fixedly connected to the bottom center of the filter screen surface 52 .

[0095] That is to say, under the action of the lifting mechanism at the top of the supporting cylinder 81, the lifting arc block 61 is driven to move up and down, and then the cleaning component 64 is driven to clean the surface of the filter arc net 51. The cleaned dust particles, driven by the air, fall onto the fixed bottom plate 82 through the gap between the lifting arc block 61 and the filter arc net 51. After being filtered by the filter mesh body 83, the air moves up through the filter mesh surface 52 and is finally discharged. The dust particles remain on the fixed bottom plate 82 for centralized treatment. Under the joint action of the lower partition plate 84 and the upper partition plate 42, the dust particles are effectively prevented from flying to the adjacent filter arc net 51 and causing pollution to the unused filter arc net 51. Driven by the driving motor 85, the rotating shaft 86 rotates, driving the filter arc net 51 to rotate through the filter mesh surface 52, and switching the filter arc net 51 to achieve the effect of replacing the filter arc net 51.

[0096] In this embodiment, the exhaust device 9 includes:

[0097] The air outlet 91 is fixed at the top center of the filter assembly 5;

[0098] The distribution paddle wheel 92 is rotatably disposed at the center of the air outlet 91 .

[0099] That is to say, when the indoor air enters the air purification device through the air inlet device 4 under the action of the fan 44, the purified air is dispersed and discharged into the room through the distribution impeller 92 at the exhaust port 91 after being filtered and disinfected layer by layer by the filter component 5.

[0100] During specific implementation, in the initial state, the spaced filter arc nets 51 correspond to the air inlets 43 respectively. Under the continuous operation of the fan 44, the air enters the air purification device through the air inlet 43, and after being filtered by the filter arc nets 51, it is sterilized and disinfected under the action of the ultraviolet lamp 53, and then dispersed and discharged into the room through the distribution paddle wheel 92 at the exhaust port 91. When the air passes through the filter arc nets 51, a large amount of dust particles will adhere to the surface of the filter arc nets 51, affecting the air circulation and reducing the air purification efficiency. At this time, the lifting mechanism on the top of the supporting cylinder 81 drives the lifting arc block 61 to move up and down, and at the same time, the driving component 63 drives the cleaning component 64 to slide on the lifting arc block 61 through the driving gear 631. The filter arc net 51 is cleaned at different heights and positions. The cleaned dust particles, driven by a small amount of air, fall onto the fixed bottom plate 82 through the gap between the lifting arc block 61 and the filter arc net 51. The air is filtered by the filter mesh body 83, then moves up through the filter mesh surface 52, and is finally discharged. The dust particles remain on the fixed bottom plate 82 for centralized treatment. When the air purification device has been working for a long time, the filter arc net 51 corresponding to the air inlet 43 is difficult to achieve an effective filtering effect. At this time, the driving motor 85 drives the rotating shaft 86 to rotate, and then drives the filter arc net 51 to rotate through the filter mesh surface 52, and switches the filter arc net 51. The filter arc net 51 is replaced to continue the air purification work.

[0101] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An energy-saving air purification device for buildings, characterized in that: include: Base (1); A connecting platform (2) fixed on the base (1); A bearing connection surface (3) is fixed on the connection platform (2), and a bearing annular surface (31) is provided on the inner side of the bearing connection surface (3); A plurality of air inlet devices (4) are provided in an annular distribution and fixed on the bearing connection surface (3); A filter assembly (5) is arranged in the middle of the air inlet device (4); A plurality of cleaning devices (6) are provided in an annular distribution and are arranged corresponding to the air inlet device (4), and the cleaning devices (6) are located above the bearing annular surface (31); A protective housing (7) arranged on the outside of the air inlet device (4); A collecting and guiding device (8) is arranged in the middle of the connecting platform (2), with the bottom fixedly connected to the base (1) and the top connected to the cleaning device (6); The exhaust device (9) is fixed at the top center of the plurality of air inlet devices (4), and the exhaust device (9) is fixedly connected to the filter assembly (5).

2. The energy-saving air purification device for buildings according to claim 1, characterized in that: The air inlet device (4) comprises: A plurality of connection frames (41) are provided in an annular distribution and are fixed on the load-bearing connection surface (3); A plurality of upper partition plates (42) are provided in an annular arrangement and are disposed in the connection frame (41). The number of the upper partition plates (42) is twice the number of the connection frames (41). The upper partition plates (42) are in contact with the outer wall of the filter assembly (5); An air inlet (43) is arranged at positions corresponding to two upper partition plates (42) corresponding to the same connecting frame (41), and the air inlet (43) is fixedly connected to the connecting frame (41); The fan (44) is fixed at the air inlet (43).

3. The energy-saving air purification device for buildings according to claim 2, characterized in that: The filtering component (5) comprises: A plurality of filter arc nets (51) are provided in an annular distribution and are arranged in an inclined manner, and the number of the filter arc nets (51) is twice the number of air inlets (43), and the filter arc nets (51) are arranged at intervals from the upper partition plate (42); A filter screen surface (52) is fixed to the bottom of the filter arc screen (51), and the filter screen surface (52) is connected to the collection and guiding device (8); The ultraviolet lamp (53) is arranged at the center of the filter arc net (51) and is fixedly connected to the filter net surface (52).

4. The energy-saving air purification device for buildings according to claim 3 is characterized in that: The cleaning device (6) comprises: A plurality of lifting arc blocks (61) are provided in an annular distribution, corresponding to the connection frame (41), and arranged on the top of the collecting and guiding device (8), and the lifting arc blocks (61) are arranged outside the filtering arc net (51) and are spaced apart from the filtering arc net (51); A load-bearing arc surface (62) is fixed on the outside of the lifting arc block (61), and the load-bearing arc surface (62) is located directly above the load-bearing annular surface (31); A driving assembly (63) is arranged on the bearing arc surface (62) and connected to the outer side of the lifting arc block (61); The cleaning assembly (64) is slidably disposed on the lifting arc block (61) and is connected to the inner side of the driving assembly (63).

5. The energy-saving air purification device for buildings according to claim 4, characterized in that: The driving assembly (63) comprises: A driving gear (631) is disposed on the bearing arc surface (62) and meshes with the outer side of the lifting arc block (61); A control body (632) is arranged above the driving gear (631), and the bottom of the control body (632) is fixedly connected to the top center of the driving gear (631) via a shaft, and an elastic connecting piece is provided on a side of the control body (632) facing the cleaning component (64), and the elastic connecting piece is fixedly connected to the cleaning component (64).

6. The energy-saving air purification device for buildings according to claim 5, characterized in that: The cleaning component (64) comprises: A sliding block (641) is slidably disposed on the top of the lifting arc block (61); A connecting body (642), the bottom of which is slidably connected to the sliding block (641), and the side of which is fixedly connected to the elastic connecting piece on the control body (632); A plurality of cleaning brushes (643) are distributed along the connecting body (642) and are arranged on a side of the connecting body (642) close to the filter arc net (51).

7. The energy-saving air purification device for buildings according to claim 4, characterized in that: The collecting and guiding device (8) comprises: A supporting cylinder (81) is arranged inside the connecting platform (2), the bottom of which is fixedly connected to the base (1), and a lifting mechanism is provided on the top of the supporting cylinder (81), and the supporting cylinder (81) is connected to the lifting arc block (61) via the lifting mechanism; A fixed bottom plate (82) is fixed in the supporting cylinder (81) and is located below the filter screen surface (52); The filter screen body (83) is in an inverted cone shape, with the bottom fixed on the fixed bottom plate (82) and the top rotatably connected to the filter screen surface (52); A lower partition plate (84) is arranged corresponding to the upper partition plate (42), fixed on the fixed bottom plate (82), and located between the filter screen body (83) and the supporting cylinder (81); A driving motor (85) is fixed to the bottom of the fixed bottom plate (82); The rotating shaft (86) has one end fixedly connected to the driving motor (85) and the other end passing through the fixed bottom plate (82) and fixedly connected to the bottom center of the filter screen surface (52).

8. The energy-saving air purification device for buildings according to claim 1, characterized in that: The exhaust device (9) comprises: An air outlet (91) is fixed at the top center of the filter assembly (5); The distribution paddle wheel (92) is rotatably disposed at the center of the air outlet (91).

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