A PM2.5 collection device

Abstract

The present application provides a PM2.5 collection device, which includes a collection cabinet, a collection tube, and a collection bottle. Among them, the collection bottle is arranged inside the collection cabinet, the collection tube is arranged at the top of the collection cabinet and penetrates through the collection cabinet to be connected to the collection bottle. A ventilation groove is provided on the side wall of the top of the collection tube, and a dust-proof cover is provided at the top of the collection tube. A cleaning mechanism is provided at the top of the collection cabinet, and the outlet of the cleaning mechanism extends into the collection tube near the top. A spraying device connected to the outlet of the cleaning mechanism is provided inside the collection tube, and the output port of the spraying device faces the inner wall of the collection tube. The PM2.5 collection device of the present application can send the cleaning liquid into the collection tube through the cleaning mechanism and spray it downward onto the inner wall of the collection tube to wash the inner wall of the collection tube clean, realizing the cleaning of the collection tube, thereby effectively solving the problem in the prior art that the fine particles in the air will precipitate in the extraction pipeline of the collection device, affecting the next detection, and the longer the use time, the greater the error in the detection result.

Description

Technical Field

[0001] The present invention belongs to the technical field of collection devices for outdoor environmental monitoring stations, and particularly relates to a PM2.5 collection device. Background Art

[0002] PM2.5 generally refers to fine particulate matter. Fine particulate matter refers to particulate matter in ambient air with an aerodynamic equivalent diameter less than or equal to 2.5 micrometers. It can remain suspended in the air for a long time. The higher its concentration in the air, the more serious the air pollution represents. Although PM2.5 is only a component with a very small content in the Earth's atmosphere, it has an important impact on air quality and visibility, etc. Compared with coarser atmospheric particulate matter, PM2.5 has a small particle size, a large surface area, strong activity, is easily attached with toxic and harmful substances (for example, heavy metals, microorganisms, etc.), and has a long residence time and a long transport distance in the atmosphere. Therefore, it has a greater impact on human health and the quality of the atmospheric environment.

[0003] Currently, for the PM2.5 collection device used in outdoor environmental monitoring stations, the gravimetric method is generally used for monitoring. Its principle is to respectively pass through a sampler with certain cutting characteristics to extract a fixed volume of air at a constant speed, so that PM2.5 in the ambient air is intercepted on a filter membrane with a known mass. According to the mass difference of the filter membrane before and after sampling and the sampling volume, the concentration of PM2.5 is calculated. However, for the detection using this method, since the fine particulate matter in the air will precipitate in the extraction pipeline in the collection device, it will have a certain impact on the next detection. The longer the use time, the greater the error of the detection result. Summary of the Invention

[0004] In view of some or all of the above technical problems existing in the prior art, a PM2.5 collection device is provided, which solves the problems that the extraction pipeline in the existing collection device will precipitate fine particulate matter in the air, affecting the next detection, and the longer the use time, the greater the error of the detection result.

[0005] In order to solve the above technical problems, the technical solution proposed by the present invention is as follows:

[0006] A PM2.5 collection device includes a collection cabinet, a collection pipe, and a collection bottle. Among them, the collection bottle is arranged inside the collection cabinet, the collection pipe is arranged at the top of the collection cabinet and penetrates the collection cabinet to be connected with the collection bottle. The side wall of the top of the collection pipe is provided with a ventilation slot and the top of the collection pipe is provided with a dust-proof cover. The top of the collection cabinet is provided with a cleaning mechanism. The outlet of the cleaning mechanism extends into the collection pipe near the top. A spraying device connected to the outlet of the cleaning mechanism is arranged inside the collection pipe, and the output port of the spraying device faces the inner wall of the collection pipe.

[0007] According to the PM2.5 collection device of the present invention, the cleaning liquid can be sent into the collection tube through the cleaning mechanism, sprayed downward onto the inner wall of the collection tube, and the inner wall of the collection tube can be washed clean, realizing the cleaning of the collection tube. Thus, it effectively solves the problem that in the prior art, the fine particles in the air will precipitate in the extraction pipeline of the collection device, affecting the next detection, and the longer the use time, the greater the error of the detection result.

[0008] For the above technical solution, the following further improvements can be made.

[0009] According to the PM2.5 collection device of the present invention, in a preferred embodiment, the cleaning mechanism includes a motor, a water pump, a water tank and a connecting water pipe. Among them, the output end of the motor is connected to the water pump, the input end of the water pump is connected to the water tank, the output end of the water pump is connected to the connecting water pipe, and the outlet of the connecting water pipe is connected to the spraying device.

[0010] Specifically, the motor drives the water pump to rotate, pumping the cleaning liquid out of the water tank, sending the cleaning liquid into the collection tube through the connecting water pipe, spraying it out from the spraying device, and the cleaning liquid is sprayed downward onto the inner wall of the collection tube, washing the inner wall of the collection tube clean. Therefore, the whole cleaning process is simple, convenient and has good effect.

[0011] Specifically, in a preferred embodiment, the spraying device includes an annular water tank connected to the outlet of the connecting water pipe, an annular water pipe connected to the annular water tank, and a nozzle connected to the outlet of the annular water pipe, and the spraying direction of the nozzle faces the inner wall of the collection tube.

[0012] The spraying device with the above structural form can extremely conveniently realize the connection and cooperation with the cleaning structure, and effectively improve the cleaning effect.

[0013] Furthermore, in a preferred embodiment, the bottom of the collection tube is connected to the wastewater collection device, and the wastewater collection device is arranged on the back of the collection cabinet.

[0014] Collecting the wastewater after cleaning the collection tube through the wastewater collection device can effectively prevent the outflow of wastewater and cause pollution. Moreover, the wastewater collection device is directly arranged on the back of the collection cabinet, which can effectively simplify the structure of the whole collection device, reduce the volume, and improve the operation convenience and applicability of the whole collection device.

[0015] Specifically, in a preferred embodiment, the wastewater collection device includes a wastewater tank arranged on the back of the collection cabinet and a wastewater pipe respectively connected to the collection tube and the wastewater tank.

[0016] The wastewater collection device with the above structural form has a simple structure and is easy to arrange.

[0017] Further, in a preferred embodiment, a sliding assembly is installed on the back of the wastewater tank. A water collecting device capable of connecting to the water outlet end of the wastewater pipe is provided on the side of the sliding assembly away from the back of the wastewater tank. The sliding assembly can drive the water collecting device to move into the wastewater tank to communicate with the wastewater tank.

[0018] By setting the sliding assembly, it is extremely convenient to implement the wastewater collection work after the cleaning of the collection pipe is completed, thereby greatly improving the applicability of the entire collection device.

[0019] Specifically, in a preferred embodiment, the sliding assembly includes an installation chute arranged on the back of the wastewater tank. A sliding seat is slidably installed in the installation chute. A water collecting hole is formed at the end of the sliding seat away from the back of the wastewater tank. A water collecting groove capable of communicating with the water collecting hole is formed in the sliding seat. The outlet end of the wastewater pipe and the part of the end of the sliding seat away from the back of the wastewater tank are in mutual cooperation, and the water collecting hole can communicate with the outlet end of the wastewater pipe. A connecting column is provided in the sliding seat. A baffle is provided at one end of the connecting column close to the back of the wastewater tank. A limiting plate is provided on the side wall of the sliding seat away from the back of the wastewater tank. A push plate is provided at the position between the limiting plate and the baffle on the sliding seat. A first elastic support member is provided between the push plate and the inner side surface of the installation chute close to the back of the wastewater tank. A bayonet structure for clamping the baffle and communicating the water collecting groove with the wastewater tank is provided on the installation chute.

[0020] Specifically, the wastewater tank is installed on the back of the collection cabinet. The limiting plate is squeezed by the back of the collection cabinet and slides along the inside of the installation chute, driving the sliding seat to slide inward, and at the same time driving the push plate to move, so that the first elastic support member is compressed. The sliding seat drives the connecting column to move, so that the baffle slides into the wastewater tank, thereby driving the water collecting groove to be exposed, so that the water collecting hole, the water collecting groove and the wastewater tank are connected, realizing the collection of wastewater into the wastewater tank, and preventing wastewater from leaking out of the wastewater tank when the wastewater tank is removed.

[0021] Further, in a preferred embodiment, a limiting groove is provided on the side wall of the installation chute close to the wastewater tank. A limiting sliding plate slidably connected to it is provided in the limiting groove. The limiting sliding plate and the baffle are connected by a sliding rod.

[0022] Through the limiting assembly composed of the above-mentioned limiting groove, limiting sliding plate and sliding rod, the moving distance of the baffle can be effectively limited, and the sliding seat can be further prevented from detaching from the wastewater tank.

[0023] Further, in a preferred embodiment, the size of the baffle is larger than the size of the bayonet structure.

[0024] The size of the baffle is larger than the size of the bayonet structure, which can improve the sealing performance of the wastewater tank when the wastewater tank is lifted up and removed, prevent wastewater from leaking out, and prevent pollution caused by wastewater flowing out.

[0025] Specifically, in a preferred embodiment, a fixing groove is formed on the back surface of the wastewater tank. A wedge-shaped slider is slidably installed in the fixing groove. A second elastic support member is provided on the side surface of the wedge-shaped slider opposite to the back surface of the wastewater tank, and the other end of the second elastic support member is connected to the inner wall of the fixing groove. A connecting plate is provided on the back surface of the collection cabinet, and a wedge-shaped hanging buckle capable of cooperating with the wedge-shaped slider is provided on the connecting plate.

[0026] Specifically, the wedge-shaped hanging buckle is inserted into the fixing groove, squeezing the wedge-shaped slider, causing the wedge-shaped slider to slide in the fixing groove, compressing the second elastic support member, and at the same time, the elastic force of the second elastic support member clamps the wedge-shaped hanging buckle, realizing the quick and convenient installation of the wastewater tank on the back surface of the collection cabinet.

[0027] Compared with the prior art, the advantages of the present invention are as follows: The cleaning liquid can be sent into the collection tube through the cleaning mechanism and sprayed downward onto the inner wall of the collection tube to wash the inner wall of the collection tube clean, realizing the cleaning of the collection tube, thereby effectively solving the problems in the prior art that the pipes in the collection device will precipitate fine particles in the air, affecting the next detection, and the longer the use time, the greater the error in the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The preferred embodiments of the present invention will be described in detail below with reference to the drawings. In the drawings:

[0029] Figure 1 Schematically shows the overall structure of the PM2.5 collection device according to an embodiment of the present invention;

[0030] Figure 2 Schematically shows the side view structure of the PM2.5 collection device according to an embodiment of the present invention;

[0031] Figure 3 Schematically shows the side sectional view structure of the PM2.5 collection device according to an embodiment of the present invention;

[0032] Figure 4 Schematically shows Figure 3 the partial enlarged structure at A in

[0033] Figure 5 Schematically shows Figure 3 the partial enlarged structure at B in

[0034] Figure 6 Schematically shows Figure 3 the partial enlarged structure at C in

[0035] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to make the technical solutions and advantages of the present invention clearer and more understandable, the exemplary embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. And without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0037] Figure 1 Schematically shows the overall structure of the PM2.5 collection device 10 according to an embodiment of the present invention. Figure 2 Schematically shows the side view structure of the PM2.5 collection device 10 according to an embodiment of the present invention. Figure 3 Schematically shows the side sectional view structure of the PM2.5 collection device 10 according to an embodiment of the present invention. Figure 4 Schematically shows Figure 3 The partial enlarged structure at A in Figure 5 Schematically shows Figure 3 The partial enlarged structure at B in Figure 6 Schematically shows Figure 3 The partial enlarged structure at C in

[0038] As Figures 1 to 3 As shown, the PM2.5 collection device 10 according to an embodiment of the present invention includes a collection cabinet 1, a collection tube 2, and a collection bottle 3. Among them, at least two groups of collection bottles 3 are arranged in the collection cabinet 1. The collection tube 2 is arranged at the top of the collection cabinet 1 and penetrates through the collection cabinet 1 to be connected to the collection bottle 3. The side wall of the top of the collection tube 1 is provided with a ventilation slot 21, and the top of the collection tube 2 is provided with a dust-proof cover 22. A cleaning mechanism is provided at the top of the collection cabinet 2. The outlet of the cleaning mechanism extends into the collection tube 2 near the top. A spraying device connected to the outlet of the cleaning mechanism is provided in the collection tube 2, and the output port of the spraying device faces the inner wall of the collection tube 2.

[0039] According to the PM2.5 collection device of the embodiment of the present invention, the cleaning liquid can be sent into the collection tube through the cleaning mechanism and sprayed downward onto the inner wall of the collection tube to wash the inner wall of the collection tube clean, realizing the cleaning of the collection tube. Thus, it effectively solves the problem in the prior art that the extraction pipeline in the collection device will precipitate fine particles in the air, affecting the next detection, and the longer the use time, the greater the error in the detection result.

[0040] As Figures 1 to 4As shown in the figure, specifically, in this embodiment, the cleaning mechanism includes a motor 41, a water pump 42, a water tank 43, and a connecting water pipe 44. Among them, the output end of the motor 41 is connected to the water pump 42, the input end of the water pump 42 is connected to the water tank 43, the output end of the water pump 42 is connected to the connecting water pipe 44, and the outlet of the connecting water pipe 44 is connected to the spraying device. Specifically, the motor drives the water pump to rotate, pumping the cleaning liquid out of the water tank, passing through the connecting water pipe, sending the cleaning liquid into the collecting pipe, and spraying it out from the spraying device. The cleaning liquid sprays downward onto the inner wall of the collecting pipe, flushing the inner wall of the collecting pipe clean. Therefore, the entire cleaning process is simple, convenient, and has a good effect. Specifically, in this embodiment, the spraying device includes an annular water tank 51 connected to the outlet of the connecting water pipe 44, an annular water pipe 52 connected to the annular water tank 51, and a nozzle 53 connected to the outlet of the annular water pipe 52, and the spraying direction of the nozzle 53 faces the inner wall of the collecting pipe 2. Preferably, the nozzle 53 includes at least two groups. The spraying device with the above structural form can extremely conveniently realize the connection and cooperation with the cleaning structure, and effectively improve the cleaning effect. Specifically, the cleaning liquid is pumped out of the water tank, sent into the annular water tank through the connecting water pipe, then sent into the annular water pipe, and sprayed out from the nozzle. The cleaning liquid sprays downward onto the inner wall of the collecting pipe, flushing the inner wall of the collecting pipe clean, thereby realizing the cleaning work of the collecting pipe.

[0041] As Figure 2 and Figure 3 shown, further, in this embodiment, the bottom of the collecting pipe 2 is connected to the waste water collection device, and the waste water collection device is arranged on the back of the collecting cabinet 1. Collecting the waste water after cleaning the collecting pipe through the waste water collection device can effectively prevent the waste water from flowing out and causing pollution. Moreover, the waste water collection device is directly arranged on the back of the collecting cabinet, which can effectively simplify the structure of the entire collecting device, reduce the volume, and improve the operation convenience and applicability of the entire collecting device. Specifically, in this embodiment, the waste water collection device includes a waste water tank 61 arranged on the back of the collecting cabinet 1 and a waste water pipe 62 respectively connected to the collecting pipe 2 and the waste water tank 61. The waste water collection device with the above structural form has a simple structure and is easy to arrange.

[0042] As Figure 3 and Figure 5 shown, further, in this embodiment, a sliding component is installed on the back of the waste water tank 61, and a water collection device capable of connecting to the water outlet end of the waste water pipe 62 is provided on one side of the sliding component away from the back of the waste water tank 61. The sliding component can drive the water collection device to move into the waste water tank 61 and communicate with the waste water tank 61. By setting the sliding component, it is extremely convenient to implement the waste water collection work after the cleaning of the collecting pipe is completed, thereby greatly improving the applicability of the entire collecting device.

[0043] As Figure 5As shown in the figure, specifically, in this embodiment, the sliding assembly includes an installation chute 63 arranged on the back surface of the wastewater tank 61. A sliding seat 64 is slidably installed in the installation chute 63. At the end of the sliding seat 64 away from the back surface of the wastewater tank 61, there are provided two or more sets of water collection holes 65. A water collection groove 66 that can communicate with the water collection holes 65 is provided in the sliding seat 64. The outlet end of the wastewater pipe 62 and the part of the sliding seat 64 away from the back surface of the wastewater tank 61 form a matching part, and the water collection holes 65 can communicate with the outlet end of the wastewater pipe 62. A connecting column 67 is provided in the sliding seat 64. A baffle 68 is provided at one end of the connecting column 67 close to the back surface of the wastewater tank 61. A limiting plate 69 is provided on the side wall of the sliding seat 64 away from the back surface of the wastewater tank 61. Two or more sets of push plates 70 are provided at the position between the limiting plate 69 and the baffle 68 on the sliding seat 64. A first elastic support member 71 is provided between the push plate 70 and the inner side surface of the installation chute 63 close to the back surface of the wastewater tank 61. A bayonet structure 72 for clamping the baffle 68 and communicating the water collection groove 66 with the wastewater tank 61 is provided on the installation chute 63. Specifically, the wastewater tank is installed on the back of the collection cabinet. The limiting plate is squeezed by the back of the collection cabinet and slides along the inside of the installation chute, driving the sliding seat to slide inward, and at the same time driving the push plate to move, so that the first elastic support member is compressed. The sliding seat drives the connecting column to move, so that the baffle slides into the wastewater tank, thereby driving the water collection groove to be exposed, making the water collection holes, the water collection groove and the wastewater tank communicate with each other, realizing the collection of wastewater into the wastewater tank, and preventing the wastewater from leaking out of the wastewater tank when the wastewater tank is removed.

[0044] As Figure 3 and Figure 5 shown, further, in this embodiment, a limiting groove 73 is provided on the side wall of the installation chute 63 close to the wastewater tank 61. A limiting sliding plate 74 slidably connected to it is provided in the limiting groove 73. The limiting sliding plate 74 and the baffle 68 are connected by a sliding rod 75. Through the limiting assembly composed of the above-mentioned limiting groove, limiting sliding plate and sliding rod, the moving distance of the baffle can be effectively limited, and the sliding seat can be further prevented from detaching from the wastewater tank. Further, as Figure 3 and Figure 5 shown, the size of the baffle 68 is larger than the size of the bayonet structure. The size of the baffle being larger than the size of the bayonet structure can improve the sealing performance of the wastewater tank when the wastewater tank is lifted up and removed, prevent the wastewater from leaking out, and prevent pollution caused by the outflow of the wastewater.

[0045] Specifically, as Figure 3 and Figure 5As shown, specifically, in this embodiment, the baffle 68 is a circular baffle. An arc-shaped groove 76 is provided at the outlet end of the wastewater pipe 62. The sliding seat 64 is of a cylindrical structure. The water collecting holes 65 are opened on the arc-shaped surface of the sliding seat 64, and the end far from the wastewater pipe 62 penetrates and communicates with the water collecting tank 66. The sliding seat 64 slides into the arc-shaped groove 76 so that the water collecting holes 65 are aligned with the wastewater pipe 62. The wastewater enters the water collecting holes 65 after passing through the arc-shaped groove 76 from the wastewater pipe 62, thereby collecting the wastewater from the wastewater pipe 62 into the wastewater tank 61.

[0046] As Figure 3 and Figure 6 As shown, specifically, in this embodiment, a fixing groove 81 is opened on the back surface of the wastewater tank 61. A wedge-shaped slider 82 is slidably installed in the fixing groove 81. A second elastic support member 83 is provided on the side surface of the wedge-shaped slider 82 opposite to the back surface of the wastewater tank 61. The other end of the second elastic support member 83 is connected to the inner wall of the fixing groove 81. A connecting plate 84 is provided on the back surface of the collection cabinet 1. A wedge-shaped hanging buckle 85 capable of cooperating with the wedge-shaped slider 82 is provided on the connecting plate 84. Specifically, the wedge-shaped hanging buckle is snapped into the fixing groove, squeezing the wedge-shaped slider, causing the wedge-shaped slider to slide in the fixing groove, so that the second elastic support member is compressed, and at the same time, the elastic force of the second elastic support member clamps the wedge-shaped hanging buckle, realizing the quick and convenient installation of the wastewater tank on the back surface of the collection cabinet.

[0047] Preferably, in this embodiment, both the first elastic support member 71 and the second elastic support member 83 are spring structures, which are simple in structure and easy to arrange and install.

[0048] The working process of the PM2.5 collection device according to the embodiment of the present invention is as follows:

[0049] First, the wedge-shaped hanging buckle 85 is snapped into the fixing groove 81, squeezing the wedge-shaped slider 82, causing the wedge-shaped slider 82 to slide in the fixing groove 81, so that the second elastic support member 83 is compressed, and at the same time, the elastic force of the second elastic support member 83 clamps the wedge-shaped hanging buckle 85, installing the wastewater tank 61 on the back surface of the collection cabinet 1. The sliding seat 64 slides into the arc-shaped groove 76, and the water collecting holes 65 are aligned with the wastewater pipe 62; the limiting plate 69 is squeezed by the back surface of the collection cabinet 1 and slides into the installation chute 63, driving the sliding seat 64 to slide inward, and at the same time driving the push plate 70 to move, so that the first elastic support member 71 is compressed. The sliding seat 64 drives the connecting column 67 to move, causing the circular baffle 68 to slide into the wastewater tank 61, thereby driving the water collecting tank 66 to be exposed, so that the water collecting holes 65, the water collecting tank 66 and the wastewater tank 61 are communicated;

[0050] The motor 41 drives the water pump 42 to rotate, pumping the cleaning liquid out of the water tank 43. Through the connecting water pipe 44, the cleaning liquid is sent into the annular water tank 51 and then into the annular water pipe 52, and is sprayed out from the nozzle 53. The cleaning liquid is sprayed downward onto the inner wall of the collection pipe 2, flushing the inner wall of the collection pipe 2 clean. The waste water flows into the waste water pipe 62, converges into the water collection tank 66 from the water collection holes 65, and finally enters the waste water tank 61 for collection;

[0051] After the waste water tank 61 has collected waste water for a period of time, the waste water tank 61 is lifted upward and removed. The first elastic support member 71 resets, driving the sliding seat 64 to move outward, driving the circular baffle 68 to move, sliding the water collection tank 66 into the side wall of the waste water tank 61, and sealing the waste water tank 61 to prevent waste water from leaking out; The cleaning of the collection pipe 2 is realized, and at the same time, the waste water is collected to prevent pollution caused by the outflow of waste water.

[0052] According to the above embodiments, it can be seen that the PM2.5 collection device of the present invention can send the cleaning liquid into the collection pipe through the cleaning mechanism, spray it downward onto the inner wall of the collection pipe, and flush the inner wall of the collection pipe clean, realizing the cleaning of the collection pipe. Thus, it effectively solves the problem that in the prior art, the pipes extracted in the collection device will precipitate fine particulate matter in the air, affecting the next detection, and the longer the use time, the greater the error in the detection result.

[0053] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and / or modifications falling within the scope of the present invention. All changes and / or modifications made according to the embodiments of the present invention should be covered within the protection scope of the present invention.

Claims

1. A PM2.5 collection device, characterized in that, It includes a collection cabinet, a collection tube, and a collection bottle; among them, the collection bottle is arranged inside the collection cabinet, the collection tube is arranged at the top of the collection cabinet and penetrates through the collection cabinet to be connected with the collection bottle; a ventilation slot is provided on the side wall of the top of the collection tube, and a dust-proof cover is provided at the top of the collection tube; a cleaning mechanism is provided at the top of the collection cabinet, the outlet of the cleaning mechanism extends into the collection tube near the top, a spraying device connected to the outlet of the cleaning mechanism is provided inside the collection tube, and the output port of the spraying device faces the inner wall of the collection tube; the bottom of the collection tube is connected to a waste water collection device, and the waste water collection device is arranged on the back of the collection cabinet; the waste water collection device includes a waste water tank arranged on the back of the collection cabinet and a waste water pipe respectively connected to the collection tube and the waste water tank; a sliding component is installed on the back of the waste water tank, and a water collection device capable of being connected to the water outlet end of the waste water pipe is provided on one side of the sliding component away from the back of the waste water tank, and the sliding component can drive the water collection device to move into the waste water tank to communicate with the waste water tank; the sliding component includes an installation chute arranged on the back of the waste water tank, a sliding seat is slidably installed in the installation chute, a water collection hole is opened at the end of the sliding seat away from the back of the waste water tank, and a water collection groove capable of communicating with the water collection hole is opened in the sliding seat; the outlet end of the waste water pipe and the part of the end of the sliding seat away from the back of the waste water tank form a matching part, and the water collection hole can communicate with the outlet end of the waste water pipe; a connecting column is provided in the sliding seat, a baffle is provided at one end of the connecting column close to the back of the waste water tank, a limiting plate is provided on the side wall of the sliding seat away from the back of the waste water tank, a push plate is provided at the position between the limiting plate and the baffle on the sliding seat, and a first elastic support member is provided between the push plate and the inner side surface of the installation chute close to the back of the waste water tank; a bayonet structure for clamping the baffle and communicating the water collection groove with the waste water tank is provided on the installation chute.

2. The PM2.5 collection device according to claim 1, characterized in that, The cleaning mechanism includes a motor, a water pump, a water tank, and a connecting water pipe; among them, the output end of the motor is connected to the water pump, the input end of the water pump is connected to the water tank, the output end of the water pump is connected to the connecting water pipe, and the outlet of the connecting water pipe is connected to the spraying device.

3. The PM2.5 collection device according to claim 2, characterized in that, The spraying device includes an annular water tank connected to the outlet of the connecting water pipe, an annular water pipe connected to the annular water tank, and a nozzle connected to the outlet of the annular water pipe, and the spraying direction of the nozzle faces the inner wall of the collection tube.

4. The PM2.5 collection device according to claim 1, wherein, A limiting groove is provided on the side wall of the installation chute close to the waste water tank, a limiting sliding plate slidably connected to it is provided in the limiting groove, and the limiting sliding plate is connected to the baffle through a sliding rod.

5. The PM2.5 collection device according to claim 1, characterized in that The size of the baffle is larger than the size of the bayonet structure.

6. The PM2.5 collection device according to any one of claims 1 to 5, characterized in that, A fixing groove is opened on the back of the waste water tank; a wedge-shaped slider is slidably installed in the fixing groove, a second elastic support member is provided on the side surface of the wedge-shaped slider opposite to the back of the waste water tank, and the other end of the second elastic support member is connected to the inner wall of the fixing groove; A connecting plate is provided on the back of the collection cabinet, and a wedge-shaped hanging buckle capable of cooperating with the wedge-shaped slider is provided on the connecting plate.

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