Air quality detection device and method of use thereof

Abstract

The application relates to an air quality detection device applied to the field of air detection and a use method thereof, which comprises an outer shell, the space in the outer shell is divided into a first cavity and a second cavity through a separation frame installed on a bottom plate frame, a filter cleaning unit is arranged on one side of the separation frame, the filter cleaning unit comprises a scraping frame, a filter plate is inlaidly installed in the inside of the scraping frame, a constraint frame groove is installed on the back of the filter plate, a vibrator is installed on the surface of the constraint frame groove, a driving adjustment unit is installed in the second cavity, the driving adjustment unit comprises a driving motor, a reciprocating lead screw is connected to the output end of the driving motor, a moving frame is threadedly sleeved on the surface of the reciprocating lead screw, a push rod is connected to the surface of the moving frame, the scraping frame is driven to translate and overturn through the reciprocating lead screw, self-cleaning of the filter plate, scraping of the inner wall of the cavity and synchronous cleaning of the protective door plate are realized, dust removal is designed in combination with vibration shaking, and an integrated dust removal detection system is formed.

Description

Technical Field

[0001] This invention relates to air detection devices, and more particularly to an air quality detection device and its method of use applied in the field of air detection. Background Technology

[0002] Chinese invention patent CN118209688B discloses an energy-saving environmental monitoring device. When detecting air quality, the device first backflushes before testing, ensuring the accuracy of real-time monitoring data. Samples from the corresponding locations can be automatically saved for subsequent testing, enabling efficient and accurate acquisition of monitoring data.

[0003] Chinese invention patent CN119001013B discloses a building air quality detection device that uses a rotating dust removal support arm to clean the dust on the outer side of the air filter head, clean the components and the dust removal cover, prevent the impurities accumulated inside the detection box from excessively affecting the detection quality, and greatly improve the detection efficiency and accuracy.

[0004] In existing air detection devices, the filter plates are generally cleaned by backflushing or scraping during operation. However, during backflushing, residual dust in the detection chamber may adhere to the inner wall, and incomplete cleaning will affect the quality of the next round of detection. During scraping, because the filter plates are designed before the dust detection process, some dust will be intercepted by the filter plates, resulting in a decrease in dust detection data and affecting the reliability of the detection results. Summary of the Invention

[0005] The technical problem that this invention aims to solve in response to the above-mentioned prior art is that traditional air quality detection devices are difficult to thoroughly clean the filter plates, inner walls of the chamber, and protective door panels after dust filtration, resulting in inaccurate detection data and cumbersome maintenance.

[0006] To address the aforementioned problems, this invention provides an air quality detection device, comprising an outer shell mounted on a base frame, wherein the base frame has a through groove inside, a protective door panel is mounted on one side surface of the outer shell via a shaft bracket, and the space inside the outer shell is divided into a first cavity and a second cavity by an isolation frame mounted on the base frame. A filter cleaning unit is arranged on the side of the isolation frame near the protective door panel, the filter cleaning unit includes a scraping frame that slides and fits into the first cavity, a filter plate is embedded inside the scraping frame, a constraint frame groove with a cross-shaped inner cross section is mounted on the back of the filter plate, and a vibrator is mounted on the surface of the constraint frame groove.

[0007] The interior of cavity number two is equipped with a drive adjustment unit for adjusting the movement of the filter cleaning unit. The drive adjustment unit includes a drive motor, the output end of which is connected to a reciprocating screw. A moving frame is threaded onto the surface of the reciprocating screw, and a push rod is connected to the surface of the moving frame. The tail end of the push rod is hinged to a sliding block installed in the constraint frame groove via a movable ball.

[0008] In the aforementioned air quality detection device, the reciprocating screw drives the scraping frame to move and flip, achieving self-cleaning of the filter plate, scraping of the inner wall of the cavity, and simultaneous cleaning of the protective door panel. Combined with the vibration and shaking dust removal design, an integrated dust removal and detection system is formed.

[0009] As a further improvement of this application, a dust sensor is embedded in the surface of the filter plate, an air quality sensor is installed inside the second cavity, and a suction fan box located in the second cavity is installed on the inner top wall of the outer shell. When the moving frame moves to the end of the reciprocating screw close to the protective door plate, the sliding block moves to the top position in the constraint frame groove.

[0010] As a further improvement of this application, the drive motor is connected to the inner wall of the outer shell through the support bracket, the length of the constraint frame groove is less than the height of the filter plate, the protective door panel and the outer shell have a magnetic attraction, the outer shell is equipped with an exhaust pipe with a built-in one-way valve on the side away from the protective door panel, and the protective door panel is provided with an air inlet inside.

[0011] As a further improvement of this application, the interior of the isolation frame is provided with a rectangular through groove, and the cross-sectional area of ​​the through groove is not greater than the cross-sectional area of ​​the filter plate, and there is a horizontal gap between the tail end of the reciprocating screw and the surface of the isolation frame.

[0012] As a further improvement of this application, the cavity is provided with a movable groove with one end through it. A movable block is slidably connected inside the movable groove, and an auxiliary groove with a length value smaller than the length value of the movable groove is provided at the top of the movable groove. An auxiliary block matching the auxiliary groove is installed on the top of the movable block. A guide slope is provided at the top of the movable block. A self-resetting shaft that runs through the inside of the scraping frame is rotatably connected to the surface of the movable block.

[0013] As a further improvement of this application, there is a gap between the installation position of the self-resetting shaft and the side surface of the moving block that is away from the guide slope. When the self-resetting shaft is displaced to the inside of the through groove, the auxiliary block is displaced to the end of the auxiliary groove that is close to the protective door plate.

[0014] As another improvement of this application, a push baffle is installed through the interior of the first cavity, and two electric push rods are installed inside the second cavity through a suspension frame. The power end of the electric push rod is connected to the surface of the push baffle. The push baffle extends through the interior of the isolation frame into the interior of the second cavity, and the push baffle is located outside the moving slot.

[0015] As a further supplement to this application, the inside of the push baffle is provided with a groove, and a spring and an electromagnetic component are installed inside the groove. The tail end of the spring is connected to a supplementary baffle with a length less than that of the push baffle, and the length of the supplementary baffle is not less than that of the filter plate. The surface of the supplementary baffle is provided with a magnetic layer that attracts the electromagnetic component.

[0016] The method of using an air quality detection device includes the following steps:

[0017] S1. When conducting air quality testing, start the suction fan box so that air from outside the outer shell can enter the first cavity through the air inlet. After preliminary detection by the dust sensor and interception by the filter plate, the gas is transferred to the second cavity. The gas data in the gas is detected by the air quality sensor, and then the gas is discharged unidirectionally through the exhaust pipe on the surface of the outer shell.

[0018] S2. After one round of testing, start the drive motor to move the moving frame and push rod toward the protective door panel, so that the scraping frame moves horizontally inside the No. 1 cavity while scraping and cleaning the residual dust adhering to the inner wall of the No. 1 cavity.

[0019] S3. When the filter plate moves to the surface of the protective door panel, the moving frame continues to move. Under the continuous pushing action and the cooperation of the self-resetting shaft, the filter plate begins to tilt and pushes the protective door panel that is in contact with it to start to move clockwise. During this process, as the filter plate continues to rotate, the upper area of ​​the scraping frame scrapes and cleans the inner surface of the protective door panel.

[0020] S4. After the filter plate moves downwards at an angle to the position near the tail end of the protective door, the fan-shaped gap formed between the protective door and the outer shell is closed by the cooperation of the push baffle and the electric push rod. Then, the vibrator is started to vibrate and clean the dust on the surface of the filter plate and the scraper frame. Then, under the action of the reciprocating screw, the moving frame and the push rod are driven back, which in turn drives the filter plate and the scraper frame to return to the vertical position and then move horizontally to reset. The push baffle is also retracted and reset. The protective door also closes the outer shell under the action of gravity and magnetic attraction.

[0021] In summary, when the drive motor moves the reciprocating screw, the scraping frame first moves horizontally to clean the inner wall of the first cavity, then pushes the filter plate to tilt and flip, simultaneously scraping away the dust adhering to the inner side of the protective door, covering dead angle areas that are difficult to reach with traditional solutions. The introduction of the vibrator further shakes off deep particles from the filter plate. The combined design of the supplementary baffle and the pushing baffle dynamically seals the fan-shaped gap formed by the first cavity and the protective door during the flipping cleaning stage, avoiding secondary dust pollution caused by vibration and dust removal. Afterwards, the reciprocating screw drives the filter plate and scraping frame to reset, while the protective door achieves closed-loop control through the collaboration of the self-resetting shaft and the magnetic protective door, ensuring thorough cleaning while maintaining the sealing of the detection chamber. Compared to traditional backflushing or fixed scrapers, this invention integrates filtration, scraping, vibration, and sealing functions into a single transmission system, reducing the need for manual intervention. It is especially suitable for long-term stable monitoring in high-dust environments, while avoiding the energy consumption problems of complex air circuits or high-pressure systems. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the internal structure of the outer shell in the first and second embodiments of this application;

[0024] Figure 3 For this application Figure 2 Enlarged diagram of point A in the diagram;

[0025] Figure 4 This is a schematic diagram showing the installation of the filter cleaning unit and vibrator according to the first embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the moving trough, moving block, and guide slope in the first and second embodiments of this application;

[0027] Figure 6 This is a schematic diagram showing the state of the filter cleaning unit in the first embodiment of this application moving horizontally to scrape and clean the inner wall of the first cavity.

[0028] Figure 7 This is a schematic diagram showing the state in which the filter cleaning unit of the first embodiment of this application is tilted and scrapes away residual dust inside the protective door panel.

[0029] Figure 8 A schematic diagram of the overall process for cleaning the inner wall of cavity one and the protective door panel of the filter cleaning unit in the first embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the installation of the electric actuator and the push baffle according to the second embodiment of this application;

[0031] Figure 10 This is a top view of the push baffle according to the second embodiment of this application;

[0032] Figure 11 This is a diagram showing the working state of the push baffle and the supplementary baffle according to the second embodiment of this application.

[0033] Explanation of the labels in the diagram:

[0034] 1. Outer shell; 2. Base plate frame; 3. Protective door panel; 4. Filter cleaning unit; 41. Scraping frame; 42. Filter plate; 43. Constraint frame groove; 5. Dust sensor; 6. Drive adjustment unit; 61. Drive motor; 62. Reciprocating screw; 63. Push rod; 7. Air quality sensor; 8. Vibrator; 201. Isolation frame; 202. Moving groove; 203. Moving block; 2031. Guide slope; 101. Suction fan box; 9. Electric push rod; 10. Push baffle; 11. Electromagnetic component; 12. Spring component; 13. Supplementary baffle. Detailed Implementation

[0035] The three embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0036] First implementation method:

[0037] Figures 1-8 An air quality detection device is shown, including an outer shell 1 mounted on a base plate 2, and the base plate 2 has a through groove inside. A protective door panel 3 is mounted on one side surface of the outer shell 1 via a shaft frame. The space inside the outer shell 1 is divided into a first cavity and a second cavity by an isolation frame 201 mounted on the base plate 2. A filter cleaning unit 4 is arranged on the side of the isolation frame 201 near the protective door panel 3. The filter cleaning unit 4 includes a scraping frame 41 that slides and fits into the first cavity. A filter plate 42 is embedded inside the scraping frame 41. A constraint frame groove 43 with a cross-shaped inner cross section is installed on the back of the filter plate 42. A vibrator 8 is installed on the surface of the constraint frame groove 43.

[0038] The interior of cavity number two is equipped with a drive adjustment unit 6 for adjusting the movement state of filter cleaning unit 4. The drive adjustment unit 6 includes a drive motor 61, the output end of the drive motor 61 is connected to a reciprocating screw 62, the surface of the reciprocating screw 62 is threaded with a moving frame, the surface of the moving frame is connected to a push rod 63, and the tail end of the push rod 63 is hinged to a sliding block installed in the constraint frame groove 43 through a movable ball.

[0039] A dust sensor 5 is embedded in the surface of the filter plate 42, an air quality sensor 7 is installed inside the second cavity, and a suction fan box 101 located in the second cavity is installed on the inner top wall of the outer shell 1. When the moving frame moves to the end of the reciprocating screw 62 near the protective door plate 3, the sliding block moves to the top position in the constraint frame groove 43.

[0040] The drive motor 61 is connected to the inner wall of the outer shell 1 through the support bracket. The length of the constraint frame groove 43 is less than the height of the filter plate 42. The protective door panel 3 and the outer shell 1 have a magnetic attraction. The outer shell 1 is equipped with an exhaust pipe with a built-in one-way valve on the side away from the protective door panel 3, and the protective door panel 3 is provided with an air inlet inside.

[0041] The isolation frame 201 has a rectangular through groove inside, and the cross-sectional area of ​​the through groove is not greater than the cross-sectional area of ​​the filter plate 42. There is a horizontal gap between the tail end of the reciprocating screw 62 and the surface of the isolation frame 201.

[0042] Specifically, the upper and lower parts of the constraint frame groove 43 are solid structures, and the middle part is a sliding groove design, with the vibrator 8 installed in the solid area.

[0043] Before conducting air quality testing, the protective door panel 3 and the outer shell 1 have a magnetic attraction, which keeps the protective door panel 3 and the outer shell 1 in a closed state. The exhaust pipe is unidirectional, and the air inlet is equipped with a control valve that is only opened during operation, which can reduce the interference of external gas and dust on the internal testing work.

[0044] During the testing operation, the control valve and the suction fan box 101 are activated, and a suction effect is generated inside the outer shell 1, allowing external gas to enter the interior of the first cavity through the air inlet. After the gas enters the first cavity, the relevant data of dust and other particulate matter will be detected by the dust sensor 5. Under the suction effect, dust and other particulate matter are intercepted on the filter plate 42, the inner wall surface of the first cavity, and the inner surface of the protective door 3. Other gas enters the interior of the second cavity, and the relevant data is detected by the air quality sensor 7. Then the gas is discharged unidirectionally from the interior of the outer shell 1 through the exhaust pipe, completing the testing work.

[0045] After the test is completed, the suction fan box 101 is closed, stopping the suction operation. Then, the drive motor 61 is started, driving the reciprocating screw 62 to rotate. During the rotation of the reciprocating screw 62, the moving frame moves horizontally to the left (that is, towards the protective door panel 3, hereinafter referred to as left). At this time, the moving frame drives the push rod 63 to move to the left, causing the scraping frame 41 and the filter plate 42 to move to the left synchronously. During the leftward movement of the scraping frame 41, its surface can scrape the surfaces of all four inner walls of the first cavity (e.g., ...). Figure 6As shown), until it moves to the left end of the moving groove 202, because the left end of the moving groove 202 is a through design, when the moving block 203 moves to the left end of the moving groove 202, the filter plate 42 and the through groove are on the same vertical plane (because the self-resetting shaft is installed at a position near the left end of the surface of the moving block 203). At this time, if the filter plate 42 is pushed to the left, the moving block 203 will follow the filter plate 42 to continue to move to the left (because the auxiliary block has not yet reached the end of the auxiliary groove), causing part of the filter plate 42 to protrude from the interior of the first cavity. At this time, the auxiliary block has moved to the left end of the auxiliary groove, restricting the moving block 203 and the filter plate 42 from continuing to move horizontally to the left, and using this force to cut off the magnetic attraction, so that the protective door panel 3 and the outer shell 1 are in a separated state.

[0046] When the moving block 203 moves to the left end of the moving groove 202, the moving frame has not yet moved to the end of the reciprocating screw 62. At this time, as the reciprocating screw 62 rotates, the moving frame continues to drive the push rod 63 to move to the left. Under the pushing action and the cooperation of the self-resetting shaft, the filter plate 42 and the scraping frame 41 gradually rotate counterclockwise around the self-resetting shaft. During this process, the upper part of the scraping frame 41 will scrape the inner surface of the protective door panel 3 (e.g., Figure 7 As shown), until the scraping frame 41 moves to a position close to the tail end of the protective door panel 3 (because the height of the protective door panel 3 is greater than the height of the corresponding notch in the outer shell 1, the scraping frame 41 can be used to thoroughly scrape away the residual dust in the corresponding area of ​​the first cavity when it moves to a position close to the tail end, and can keep the scraping frame 41 always below the protective door panel 3 for easy subsequent resetting), the inner surface of the protective door panel 3 can be thoroughly scraped and cleaned.

[0047] During the aforementioned period, the sliding block will gradually move upward along the interior of the constraint frame groove 43 (i.e., the sliding groove area) from its initial position at the lower end of the constraint frame groove 43 to ensure the smooth execution of the deflection operation.

[0048] Then the vibrator 8 is started, and the rotation of the drive motor 61 is stopped during this period to provide some spare time for vibration cleaning. The residual dust on the filter plate 42, as well as the scraper frame 41 and the protective door panel 3, is vibrated and shaken off, so that it can be smoothly discharged into the interior of the outer shell 1.

[0049] Finally, restart the drive motor 61 to move the moving frame to the right. This will cause the tilted filter cleaning unit 4 to gradually return to a vertical position. As the filter cleaning unit 4 returns to a vertical position and moves to the right, the previously separated protective door panel 3 can be resealed on the outer shell 1 under the action of gravity and magnetic attraction.

[0050] The cavity has a movable groove 202 with one end through it. A movable block 203 is slidably connected inside the movable groove 202. The top of the movable groove 202 has an auxiliary groove with a length value smaller than the length value of the movable groove 202. An auxiliary block matching the auxiliary groove is installed on the top of the movable block 203. The top of the movable block 203 is inclined with a guide slope 2031. A self-resetting shaft that runs through the inside of the scraping frame 41 is rotatably connected to the surface of the movable block 203.

[0051] There is a gap between the installation position of the self-resetting shaft and the side surface of the moving block 203 that is away from the guide slope 2031. When the self-resetting shaft is displaced to the inside of the through groove, the auxiliary block is displaced to the end of the auxiliary groove that is close to the protective door plate 3.

[0052] Specifically, when the filter cleaning unit 4 moves to the left to clean the residual dust inside the first cavity, the moving block 203 also pushes and cleans the residual dust in the moving trough 202, the auxiliary block cleans the residual dust in the auxiliary trough, and the auxiliary block pushes the dust to the guide slope 2031, and finally falls into the moving trough 202, and then pushes it out of the interior of the moving trough 202 during the subsequent movement.

[0053] Second implementation method:

[0054] Figure 2 , Figure 5 and Figures 9-11 A push baffle 10 is installed through the interior of cavity 1. Two electric push rods 9 are installed inside cavity 2 via a suspension frame. The power end of the electric push rod 9 is connected to the surface of the push baffle 10. The push baffle 10 extends through the interior of the isolation frame 201 into the interior of cavity 2, and the push baffle 10 is located outside the moving slot 202.

[0055] The push baffle 10 has a groove inside, and a spring 12 and an electromagnetic component 11 are installed inside the groove. The tail end of the spring 12 is connected to a supplementary baffle 13 with a length less than that of the push baffle 10, and the length of the supplementary baffle 13 is not less than that of the filter plate 42. The surface of the supplementary baffle 13 is provided with a magnetic layer that attracts the electromagnetic component 11.

[0056] Unlike the first embodiment, in the first embodiment, after the protective door panel 3 is raised and the filter plate 42 is deflected counterclockwise, a fan-shaped gap is formed between the outer shell 1 and the outside. During the subsequent vibration and dust removal process, the suspended and diffused dust may re-enter the interior of the outer shell 1 through the fan-shaped gap, causing pollution. This embodiment improves the treatment of this phenomenon.

[0057] Specifically, before the vibration and shaking cleaning, the electric push rod 9 is activated, causing the push baffle 10 to extend out of the interior of the outer shell 1. As the supplementary baffle 13 extends fully, due to the loss of constraint from the inner wall of the first cavity, the supplementary baffle 13 extends fully out of the groove under the action of the spring member 12, which can supplement and fill the fan-shaped gap and prevent the suspended dust from returning to the interior of the outer shell 1. When it is necessary to retract the supplementary baffle 13 later, the electromagnetic member 11 is activated, and the supplementary baffle 13 is attracted into the groove by magnetic attraction. At the same time, the electric push rod 9 is activated to retract it. After some of the supplementary baffle 13 moves into the first cavity, the electromagnetic member 11 is turned off, and then the push baffle 10 continues to be driven to retract until the push baffle 10 is completely retracted. It can leave the residual dust on the surface outside the first cavity (when the push baffle 10 is retracted, the end of the groove in the first cavity used to install the push baffle 10 scrapes and cleans its surface).

[0058] The design of the spring element 12 (made of titanium-nickel shape memory alloy, a high-life material) and the supplementary baffle 13 allows the baffle 10 to avoid the moving groove 202 when it is pushed to move in the first cavity. After extending out of the first cavity, the supplementary baffle 13 can be tightly attached to the fan-shaped notch formed by the protective door panel 3 and the scraped frame 41 by the action of the spring element 12, thus achieving a good sealing effect.

[0059] The third implementation method:

[0060] The method of using an air quality detection device includes the following steps:

[0061] S1. When conducting air quality testing, start the suction fan box 101 so that the air outside the outer shell 1 can enter the first cavity through the air inlet. After preliminary detection by the dust sensor 5 and interception by the filter plate 42, the gas is transferred to the second cavity. The gas data in the gas is detected by the air quality sensor 7. Then the gas is discharged unidirectionally through the exhaust pipe on the surface of the outer shell 1.

[0062] S2. After a round of testing, start the drive motor 61 to move the moving frame and push rod 63 toward the protective door panel 3, so that the scraping frame 41 moves horizontally inside the cavity 1 and scrapes away the residual dust adhering to the inner wall of the cavity 1.

[0063] S3. When the filter plate 42 moves to fit against the surface of the protective door panel 3, the moving frame continues to move. Under the continuous pushing action and the cooperation of the self-resetting shaft, the filter plate 42 begins to tilt and pushes the protective door panel 3 to start to move clockwise. During this process, as the filter plate 42 continues to rotate, the upper area of ​​the scraping frame 41 scrapes and cleans the inner surface of the protective door panel 3.

[0064] S4. After the filter plate 42 moves downward at an angle to the position near the tail end of the protective door plate 3, the fan-shaped gap formed by the protective door plate 3 and the outer shell 1 is closed by the cooperation of the push baffle 10 and the electric push rod 9. Then, the vibrator 8 is started to vibrate and clean the dust on the surface of the filter plate 42 and the scraping frame 41. Then, under the action of the reciprocating screw 62, the moving frame and the push rod 63 are driven back, thereby driving the filter plate 42 and the scraping frame 41 to return to the vertical position and then move horizontally to reset. The push baffle 10 is also retracted and reset. The protective door plate 3 also closes the outer shell 1 under the action of gravity and magnetic attraction.

[0065] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. An air quality detection device comprising an outer housing (1) mounted on a base frame (2), and a through slot is arranged in the interior of the base frame (2), characterized in that, The side surface of the outer shell (1) is provided with a protective door plate (3) through an axle support, the space inside the outer shell (1) is divided into a first cavity and a second cavity through a partition frame (201) installed on the bottom plate support (2), the partition frame (201) is provided with a filter cleaning unit (4) on the side close to the protective door plate (3), the filter cleaning unit (4) comprises a scraping frame (41) slidingly fitted in the first cavity, a filter plate (42) is inlaidly installed in the inside of the scraping frame (41), a constraint frame slot (43) with a cross-shaped inner section is installed on the back of the filter plate (42), and a vibrator (8) is installed on the surface of the constraint frame slot (43). A drive adjusting unit (6) for adjusting the moving state of the filter cleaning unit (4) is installed in the second cavity, the drive adjusting unit (6) comprises a drive motor (61), a reciprocating lead screw (62) is connected to the output end of the drive motor (61), a moving frame is threadedly sleeved on the surface of the reciprocating lead screw (62), a push rod (63) is connected to the surface of the moving frame, and the tail end of the push rod (63) is hingedly connected to a sliding block installed in the constraint frame slot (43) through a movable ball. The first cavity is provided with a moving groove (202) with a through end, a moving block (203) is slidingly connected in the inside of the moving groove (202), an auxiliary groove with a length value smaller than that of the moving groove (202) is arranged on the top of the moving groove (202), an auxiliary block matched with the auxiliary groove is installed on the top of the moving block (203), a flow guide slope (2031) is arranged on the top of the moving block (203), and a self-resetting shaft is rotatably connected to the surface of the moving block (203) and crosses the inside of the scraping frame (41).

2. The air quality detection device of claim 1, wherein, A dust sensor (5) is inlaidly installed on the surface of the filter plate (42), an air quality sensor (7) is installed in the second cavity, and a suction fan box (101) located in the second cavity is installed on the inner top wall of the outer shell (1), when the moving frame moves to one end of the reciprocating lead screw (62) close to the protective door plate (3), the sliding block moves to the top end position in the constraint frame slot (43).

3. The air quality detection device of claim 1, wherein, The drive motor (61) is connected to the inner wall of the outer shell (1) through a lifting support, the length value of the constraint frame slot (43) is smaller than the height value of the filter plate (42), the protective door plate (3) and the outer shell (1) have a magnetic attraction effect, an exhaust pipe with a built-in one-way valve is installed on the side of the outer shell (1) away from the protective door plate (3), and an air inlet is arranged in the protective door plate (3).

4. The air quality detection device of claim 1, wherein, The inside of the partition frame (201) is provided with a rectangular through groove, and the cross-sectional area of the through groove is not greater than that of the filter plate (42), and there is a horizontal gap between the tail end of the reciprocating lead screw (62) and the surface of the partition frame (201).

5. The air quality detection device of claim 1, wherein, The installation position of the self-resetting shaft is spaced apart from the side surface of the moving block (203) away from the flow guide slope (2031), and when the self-resetting shaft is displaced to the inside of the through groove, the auxiliary block is displaced to one end of the auxiliary groove close to the protective door plate (3).

6. The air quality detection device of claim 1, wherein, The inside of the first cavity is provided with a pushing baffle (10), the inside of the second cavity is provided with two electric push rods (9) through a suspension plate frame, the power end of the electric push rod (9) is connected with the surface of the pushing baffle (10), the pushing baffle (10) extends to the inside of the second cavity through the inside of the isolation frame (201), and the pushing baffle (10) is located outside the moving groove (202).

7. The air quality detection device of claim 6, wherein, The inside of the pushing baffle (10) is provided with a groove, the inside of the groove is provided with a spring piece (12) and an electromagnetic piece (11), the tail end of the spring piece (12) is connected with a supplementary baffle (13) with a length less than the length of the pushing baffle (10), the length of the supplementary baffle (13) is not less than the length of the filter plate (42), and the surface of the supplementary baffle (13) is provided with a magnetic attraction layer which is mutually attracted with the electromagnetic piece (11).

8. A method of using an air quality detection device, using an air quality detection device according to any one of claims 1-7, characterized in that, The working steps are as follows: S1, when air quality detection is performed, the suction fan box (101) is started, so that the air outside the outer shell (1) enters the first cavity through the air inlet, after preliminary detection by the dust sensor (5) and interception by the filter plate (42), the gas is transferred to the second cavity, the air quality sensor (7) detects the gas data in the gas, and then the gas is unidirectionally discharged through the exhaust pipe on the surface of the outer shell (1); S2, after one round of detection, the driving motor (61) is started, the moving frame and the push rod (63) are driven to move towards the protective door plate (3), so that the scraping frame (41) moves horizontally in the first cavity while scraping the residual dust adhered to the inner wall of the first cavity; S3, when the filter plate (42) moves to be attached to the surface of the protective door plate (3), the moving frame continues to move, under the cooperation of the continuous pushing action and the self-resetting shaft, the filter plate (42) starts to incline and pushes the protective door plate (3) attached thereto to start to move clockwise, in this process, as the filter plate (42) continues to rotate, the upper region of the scraping frame (41) scrapes the inner surface of the protective door plate (3); S4, after the filter plate (42) is inclined and moves downward to the position close to the tail end of the protective door plate (3), the pushing baffle (10) and the electric push rod (9) are used to close the fan-shaped gap formed by the protective door plate (3) and the outer shell (1), then the vibrator (8) is started to vibrate and clean the dust on the surface of the filter plate (42) and the scraping frame (41), then under the action of the reciprocating lead screw (62), the moving frame and the push rod (63) are returned, thereby driving the filter plate (42) and the scraping frame (41) to return to the vertical placement state and then move horizontally to reset, and the pushing baffle (10) is recycled and reset, and the protective door plate (3) is also closed to the outer shell (1) under the action of gravity and magnetic attraction.

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