High-efficiency indoor waste gas filter

Abstract

The high-efficiency indoor waste gas filter comprises a shell, a plurality of first gas inlet holes are formed in the upper end of the shell in a penetrating mode, gas inlet channels communicated with the interior of the shell are formed in the side walls of the two ends of the shell, and a pre-filtering assembly is arranged in the shell; a dust scraping assembly for cleaning the pre-filtering assembly is arranged in the shell, and an air suction assembly located below the pre-filtering assembly is arranged in the shell. The device is reasonable in structural design, dust is removed through electrostatic adsorption, a filter screen on a dust collection electrode plate can preliminarily intercept hair and dust, the follow-up filtering load is relieved, the filter screen can be automatically cleaned, the cleaning and replacing frequency is reduced, an activated carbon plate can adsorb odor, the activated carbon plate can be heated through a U-shaped electric heating plate and a supporting heating plate, and the cleaning efficiency is improved. Moisture and VOCs in the activated carbon plate are desorbed, an ultraviolet light source irradiates a photocatalyst coating on the honeycomb ceramic plate, generated free radicals can decompose odor molecules, and secondary odor generation is prevented.

Description

Technical Field

[0001] This invention relates to the field of air filtration technology, and more particularly to a high-efficiency indoor exhaust gas filter. Background Technology

[0002] Indoor activities typically generate some exhaust gases. These gases contain particulate matter such as dust, pollen, and smoke, as well as harmful gases like formaldehyde and benzene. These gases can irritate the respiratory tract, causing symptoms such as coughing and wheezing. Long-term exposure can also lead to chronic respiratory diseases such as bronchitis and asthma. Furthermore, dust and harmful gases can damage indoor furniture, appliances, and clothing, such as causing discoloration of furniture surfaces and aging of electrical components. Cooking, smoking, and pets can also produce various odors indoors, affecting the freshness of the indoor environment. Therefore, it is necessary to filter indoor exhaust gases.

[0003] Traditional indoor air filtration typically uses physical media such as filters to intercept and adsorb particulate matter in exhaust gases. Common air purifiers use pre-filters, medium-efficiency filters, and high-efficiency filters (HEPA filters) to effectively remove dust, pollen, smoke, and other particulate matter, as well as activated carbon to adsorb odors. However, traditional filters are difficult to handle PM2.5 and smaller particles, and are prone to clogging, requiring frequent cleaning and replacement, which is cumbersome. Furthermore, the adsorption capacity of activated carbon drops sharply in high-temperature and high-humidity environments, and bacteria can easily grow in humid environments, causing secondary pollution. To address these issues, we have designed a high-efficiency indoor air filter. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a high-efficiency indoor exhaust gas filter. It removes dust through electrostatic adsorption, enabling the filter screen on the dust collection electrode plate to initially intercept hair and dust, reducing the subsequent filtration load, and automatically cleans the filter screen, reducing the frequency of cleaning and replacement. The activated carbon plate can adsorb odors, and the U-shaped electric heating plate and supporting heating plate can heat the activated carbon plate, desorbing moisture and VOCs from the activated carbon plate. The photocatalyst coating on the honeycomb ceramic plate is irradiated by ultraviolet light source, and the free radicals generated can decompose odor molecules and prevent secondary odor generation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-efficiency indoor exhaust gas filter includes a housing with multiple first air inlets extending through the upper end of the housing. Both end sidewalls of the housing have air inlet channels communicating with the interior of the housing. The housing contains a pre-filter assembly, a dust scraper assembly for cleaning the pre-filter assembly, a suction assembly located below the pre-filter assembly, an activated carbon adsorption assembly located below the suction assembly, and a photocatalytic assembly located below the activated carbon adsorption assembly. An exhaust fan is installed at the bottom inner end of the housing, and the exhaust end of the exhaust fan communicates with the outside of the housing via an exhaust pipe. A sealing door is connected to the front sidewall of the housing via a hinge.

[0006] Preferably, the air intake channel includes cavities opened on the left and right sides of the housing, the upper parts of the two cavities are connected to the interior of the housing through a connecting port, and a second air intake hole is opened through the lower sides of the housing and is connected to the corresponding cavity.

[0007] Preferably, the pre-filter assembly includes a corona electrode plate installed inside the housing. Two clamping plates are fixedly connected to both ends of the housing at different vertical positions. A dust collection electrode plate is pulled and connected between multiple clamping plates. A filter screen is installed through the dust collection electrode plate. A front baffle and a rear baffle are fixedly connected to the front and rear side walls of the dust collection electrode plate, respectively.

[0008] Preferably, the dust scraping assembly includes an insulating cleaning brush that is slidably connected to the dust collection electrode plate and is in contact with the filter screen. A connecting block is fixedly connected to the upper end of the insulating cleaning brush. A threaded rod is rotatably connected to the inner rear side wall of the housing. The threaded rod is threaded through the connecting block. A servo motor for driving the threaded rod to rotate is installed on the rear side wall of the housing. A U-shaped cover is fixedly connected to the inner rear side wall of the housing, covering the outside of the threaded rod and abutting against the side wall of the connecting block.

[0009] Preferably, the suction assembly includes a partition fixedly connected inside the housing, with an air inlet hole through the partition, and a first fan installed at the bottom of the partition opposite to the air inlet hole.

[0010] Preferably, the activated carbon adsorption assembly includes a U-shaped electric heating plate connected inside the housing, with multiple supporting heating plates fixedly connected to the bottom of the U-shaped electric heating plate, and an activated carbon plate located on the supporting heating plate being pulled out and connected inside the U-shaped electric heating plate.

[0011] Preferably, the photocatalytic component includes multiple support plates fixedly connected to the inner sidewalls at both ends of the housing, and a honeycomb ceramic plate is pulled out and connected to the multiple support plates. The honeycomb ceramic plate is coated with a photocatalyst coating. A mounting frame is fixedly connected between the inner sidewalls at both ends of the housing, and multiple ultraviolet light sources are mounted on the mounting frame.

[0012] Preferably, a transparent observation window is installed through the sealed door, and a human-machine interface is provided on the sealed door.

[0013] Compared with the prior art, the beneficial effects of this invention are as follows: 1. This high-efficiency indoor exhaust gas filter uses electrostatic adsorption to remove dust. The filter screen on the dust collection electrode plate initially intercepts hair and dust, reducing the subsequent filtration load. The servo motor drives the threaded rod to rotate, which causes the connecting block to move the insulated cleaning brush back and forth, pushing the dust attached to the filter screen forward and backward. The front and rear baffles can block the dust from the front and rear sides, preventing the filter screen from becoming clogged and allowing the filter screen to continue filtering, reducing the frequency of cleaning and replacement.

[0014] 2. This high-efficiency indoor exhaust gas filter features an activated carbon plate that adsorbs odorous substances, ensuring fresh indoor air. The U-shaped electric heating plate and supporting heating plate heat the activated carbon plate, desorbing moisture and VOCs, and killing microorganisms, thus extending the maintenance cycle and service life. Ultraviolet light irradiates the photocatalyst coating on the honeycomb ceramic plate, generating free radicals that decompose odor molecules and prevent secondary odor generation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external three-dimensional structure of a high-efficiency indoor exhaust gas filter proposed in this invention; Figure 2 This is a first-view three-dimensional structural diagram of the internal structure of a high-efficiency indoor exhaust gas filter proposed in this invention. Figure 3 This is a schematic diagram of the internal second-view three-dimensional structure of a high-efficiency indoor exhaust gas filter proposed in this invention; Figure 4 This is a schematic diagram of the internal main view of a high-efficiency indoor exhaust gas filter proposed in this invention; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at point AA; Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle; Figure 7 This is a top view schematic diagram of a high-efficiency indoor exhaust gas filter proposed in this invention.

[0016] In the diagram: 1. Shell; 2. First air inlet; 3. Cavity; 4. Connecting port; 5. Second air inlet; 6. Corona electrode plate; 7. Clamping plate; 8. Dust collection electrode plate; 9. Filter screen; 10. Rear baffle; 11. Front baffle; 12. Insulating cleaning brush; 13. Connecting block; 14. Threaded rod; 15. Servo motor; 16. Partition plate; 17. Air inlet; 18. First fan; 19. U-shaped electric heating plate; 20. Supporting heating plate; 21. Activated carbon plate; 22. Support plate; 23. Honeycomb ceramic plate; 24. Mounting bracket; 25. Ultraviolet light source; 26. Exhaust fan; 27. Exhaust pipe; 28. Sealed door; 29. ​​Transparent observation window; 30. U-shaped cover. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Reference Figures 1-7 A high-efficiency indoor exhaust gas filter includes a housing 1, which integrates a laser dust sensor (PM2.5 / PM10), an electrochemical gas sensor (formaldehyde, TVOC), a temperature and humidity sensor, a differential pressure sensor, etc., to monitor exhaust gas concentration in real time with a data accuracy error of <5%, and dynamically display the data through a human-machine interface or a mobile APP. The upper end of the housing 1 has multiple first air inlets 2, and the side walls at both ends of the housing 1 are provided with air intake channels that communicate with the interior of the housing 1. The air intake channels include cavities 3 on the left and right sides of the housing 1, and the upper parts of the two cavities 3 are connected to the interior of the housing 1 through a connecting port 4. The lower sides of the housing 1 are provided with second air inlets 5 that communicate with the corresponding cavities 3. Air from higher altitudes can enter the housing 1 through the first air inlets 2, and air from lower altitudes can enter the cavity 3 through the second air inlets 5, and then enter the housing 1 through the connecting port 4, which is conducive to the full absorption of indoor exhaust gas. The housing 1 contains a pre-filter assembly, which includes a corona electrode plate 6 installed inside the housing 1. Two clamping plates 7, positioned vertically, are fixedly connected to both end sidewalls of the housing 1. A dust collection electrode plate 8 is slidably connected between the clamping plates 7. The dust collection electrode plate 8 has horizontal ends and a V-shaped middle section, allowing it to slide stably between the clamping plates 7 for easy sliding. The V-shape also facilitates dust filtration by the filter screen 9. AC power is stepped up to high-voltage DC power via a transformer and connected to the dust collection electrode plate 8. Connecting wires are housed inside the housing 1 and include a slack section of wire. To ensure that the dust collection electrode plate 8 can be stretched outward from the housing 1 normally, corona discharge is generated through the corona electrode plate 6, causing the particles to become charged. Then, they are adsorbed by the dust collection electrode plate 8 (opposite electrode). Large particulate pollutants (such as dust and fumes) can be adsorbed through the high voltage electric field, reducing the subsequent filtration load and improving the particulate matter purification efficiency. A filter screen 9 is installed through the dust collection electrode plate 8. The filter screen 9 can initially intercept hair and dust. The front and rear side walls of the dust collection electrode plate 8 are respectively fixedly connected to the front baffle 11 and the rear baffle 10, so that after dust adheres to the filter screen 9, the dust can be blocked by the front and rear sides, reducing the amount of dust falling to the front and rear sides. The housing 1 contains a dust scraping assembly for cleaning the pre-filter components. The dust scraping assembly includes an insulated cleaning brush 12 that is slidably connected to the dust collection electrode plate 8 and adheres to the filter screen 9. A connecting block 13 is fixedly connected to the upper end of the insulated cleaning brush 12. The insulated cleaning brush 12 is mounted on the bottom of the connecting block 13 by screws. A threaded rod 14 is rotatably connected to the inner rear side wall of the housing 1, and the threaded rod 14 is threaded through the connecting block 13. A servo motor 15 is installed on the rear side wall of the housing 1 to drive the threaded rod 14 to rotate. A U-shaped cover 30 is fixedly connected to the inner rear side wall of the housing 1, covering the outside of the threaded rod 14 and abutting against the side wall of the connecting block 13. The housing 30 protects the threaded rod 14, reducing dust falling and adhering to it. It also restricts the connecting block 13, allowing it to slide only back and forth. Therefore, when the servo motor 15 drives the threaded rod 14 to rotate, the connecting block 13 drives the insulating cleaning brush 12 to slide back and forth, pushing the dust adhering to the filter screen 9 forward and backward, allowing the filter screen 9 to continue filtering and reducing the frequency of cleaning and replacement. The differential pressure sensor monitors the resistance of the filter screen 9, and when the resistance reaches 1.5 times the initial value, it automatically sends a cleaning and replacement reminder to avoid a decrease in purification efficiency due to filter screen 9 failure. The housing 1 is provided with an air intake assembly located below the pre-filter assembly. The air intake assembly includes a partition 16 fixedly connected inside the housing 1. An air inlet 17 is provided through the partition 16. A first fan 18 is installed at the bottom of the partition 16 opposite to the air inlet 17. The first fan 18 can draw air into the housing 1, accelerate air circulation, and ensure air filtration efficiency. The housing 1 contains an activated carbon adsorption assembly located below the air intake assembly. The activated carbon adsorption assembly includes a U-shaped electric heating plate 19 connected inside the housing 1. Multiple supporting heating plates 20 are fixedly connected to the bottom of the U-shaped electric heating plate 19. An activated carbon plate 21 located on the supporting heating plates 20 is pulled out and connected inside the U-shaped electric heating plate 19. The activated carbon plate 21 adsorbs small molecule polar odor substances (such as NH3 and H2S). When the sensor detects that RH>70%, the U-shaped electric heating plate 19 and the supporting heating plates 20 are activated to heat the activated carbon plate 21 (50-80℃), desorbing the moisture and VOCs in the activated carbon plate 21 and killing microorganisms, thus extending the maintenance cycle and service life. The activated carbon plate 21 uses modified activated carbon (such as loaded nano titanium dioxide / TiO2), with a denser microporous structure (pore size reduced to 0.8-2nm), which improves the adsorption capacity for organic waste gases such as formaldehyde and benzene. The housing 1 contains a photocatalytic component located below the activated carbon adsorption component. The photocatalytic component includes multiple support plates 22 fixedly connected to the inner walls of both ends of the housing 1. A honeycomb ceramic plate 23 is pulled out and connected to the multiple support plates 22. The honeycomb ceramic plate 23 is wavy and coated with a photocatalyst coating. The photocatalyst coating is a TiO2 coating and is protected by a SiO2 protective layer to prevent wear. A mounting frame 24 is fixedly connected between the inner walls of both ends of the housing 1. Multiple ultraviolet light sources 25 are installed on the mounting frame 24. The ultraviolet light sources 25 adopt the UV-C band and can decompose large molecular VOCs (such as xylene and ethyl acetate). The device can be set to automatically turn on the ultraviolet light sources 25 every certain period of operation to irradiate the photocatalyst coating on the honeycomb ceramic plate 23. The generated free radicals can decompose odor molecules and prevent secondary odor generation. An exhaust fan 26 is installed at the bottom of the housing 1. The exhaust end of the exhaust fan 26 is connected to the outside of the housing 1 through an exhaust pipe 27. A sealing door 28 is connected to the front side wall of the housing 1 by a hinge. The sealing door 28 adopts a double locking of magnetic attraction and buckle, which makes it easy to open it for internal inspection and maintenance. A transparent observation window 29 is installed through the sealing door 28, which can be used to view the internal working status of the equipment. The sealing door 28 is equipped with a human-machine interface, which can be used for control operation and can display the fluctuation of pollutant concentration over the past 24 hours and support the export of CSV data.

[0019] The Kalman filter algorithm is used to fuse multi-source data for data calibration, eliminating sensor drift (such as reducing the temperature and humidity drift error of the formaldehyde sensor from ±15% to ±5%). It can automatically calculate the remaining lifespan of the filter screen 9, activated carbon plate 21 and honeycomb ceramic plate 23, making it easy to replace them in a timely manner.

[0020] The functional principle of this invention can be explained through the following operational methods: In this invention, when the high-efficiency indoor exhaust gas filter is in use, the first fan 18 and the exhaust fan 26 are started. Air from higher altitudes can enter the housing 1 through the first air inlet 2, and air from lower altitudes can enter the cavity 3 through the second air inlet 5, and then enter the housing 1 through the connecting port 4, which is conducive to the full absorption of indoor exhaust gas. Corona discharge is generated by the corona electrode plate 6, which charges the particles and then adsorbs them by the dust collection electrode plate 8 (opposite electrode). Large particulate pollutants (such as dust and fumes) can be adsorbed by the high voltage electric field, reducing the subsequent filtration load and improving the particulate matter purification efficiency. The filter screen 9 on the dust collection electrode plate 8 can initially intercept hair and dust. After the filter screen 9 has been used for a period of time, the servo motor 15 is started to drive the threaded rod 14 to rotate, which enables the connecting block 13 to drive the insulating cleaning brush 12 to slide back and forth, pushing the dust attached to the filter screen 9 to the front and back sides. The front baffle 11 and the rear baffle 10 can block the dust through the front and back sides, reducing the clogging of the filter screen 9, so that the filter screen 9 can continue to perform filtering work and reduce the frequency of cleaning and replacement. The exhaust fan 26 draws air downwards, and the activated carbon plate 21 can adsorb small molecule polar odor substances to ensure fresh indoor air. Activating the U-shaped electric heating plate 19 and the supporting heating plate 20 can heat the activated carbon plate 21, desorb the moisture and VOCs in the activated carbon plate 21, and kill microorganisms, thus extending the maintenance cycle and service life. The ultraviolet light source 25 irradiates the photocatalyst coating on the honeycomb ceramic plate 23, and the generated free radicals can decompose odor molecules (such as sulfides and amines) into harmless substances, preventing secondary odor generation. The fully filtered and purified air is discharged from the shell 1 through the exhaust pipe 27 under the guidance of the exhaust fan 26.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency indoor exhaust gas filter, comprising a housing (1), characterized in that, The upper end of the housing (1) is provided with multiple first air inlets (2). Both sides of the housing (1) are provided with air inlet channels that communicate with the interior of the housing (1). The housing (1) is provided with a pre-filter assembly. The housing (1) is provided with a dust scraper assembly for cleaning the pre-filter assembly. The housing (1) is provided with a suction assembly located below the pre-filter assembly. The housing (1) is provided with an activated carbon adsorption assembly located below the suction assembly. The housing (1) is provided with a photocatalytic assembly located below the activated carbon adsorption assembly. A blower (26) is installed at the bottom of the housing (1). The exhaust end of the blower (26) is connected to the outside of the housing (1) through an exhaust pipe (27). The front side wall of the housing (1) is connected with a sealing door (28) through a hinge.

2. The high-efficiency indoor exhaust gas filter according to claim 1, characterized in that, The air intake channel includes cavities (3) on the left and right sides of the housing (1). The upper parts of the two cavities (3) are connected to the interior of the housing (1) through the connecting port (4). The lower sides of the housing (1) are provided with second air intake holes (5) that are connected to the corresponding cavities (3).

3. A high-efficiency indoor exhaust gas filter according to claim 1, characterized in that, The pre-filter assembly includes a corona electrode plate (6) installed inside the housing (1). Two clamping plates (7) are fixedly connected to the side walls of both ends of the housing (1) and are arranged in an upper and lower position. A dust collection electrode plate (8) is pulled and connected between the clamping plates (7). A filter screen (9) is installed through the dust collection electrode plate (8). A front baffle (11) and a rear baffle (10) are fixedly connected to the front and rear side walls of the dust collection electrode plate (8) respectively.

4. A high-efficiency indoor exhaust gas filter according to claim 3, characterized in that, The dust scraping assembly includes an insulating cleaning brush (12) that is slidably connected to the dust collection electrode plate (8) and is in contact with the filter screen (9). The upper end of the insulating cleaning brush (12) is fixedly connected to a connecting block (13). A threaded rod (14) is rotatably connected to the inner rear side wall of the housing (1). The threaded rod (14) is threaded through the connecting block (13). A servo motor (15) for driving the threaded rod (14) to rotate is installed on the rear side wall of the housing (1). A U-shaped cover (30) is fixedly connected to the inner rear side wall of the housing (1), covering the outside of the threaded rod (14) and abutting against the side wall of the connecting block (13).

5. A high-efficiency indoor exhaust gas filter according to claim 1, characterized in that, The suction assembly includes a partition (16) fixedly connected inside the housing (1), an air inlet (17) is provided through the partition (16), and a first fan (18) is installed at the bottom of the partition (16) opposite to the air inlet (17).

6. A high-efficiency indoor exhaust gas filter according to claim 1, characterized in that, The activated carbon adsorption assembly includes a U-shaped electric heating plate (19) connected inside the housing (1). Multiple supporting heating plates (20) are fixedly connected to the bottom of the U-shaped electric heating plate (19). An activated carbon plate (21) located on the supporting heating plate (20) is pulled out and connected inside the U-shaped electric heating plate (19).

7. A high-efficiency indoor exhaust gas filter according to claim 1, characterized in that, The photocatalytic component includes multiple support plates (22) that are fixedly connected to the inner sidewalls of both ends of the housing (1). A honeycomb ceramic plate (23) is pulled out and connected to the multiple support plates (22). The honeycomb ceramic plate (23) is coated with a photocatalyst coating. A mounting frame (24) is fixedly connected between the inner sidewalls of both ends of the housing (1). Multiple ultraviolet light sources (25) are mounted on the mounting frame (24).

8. A high-efficiency indoor exhaust gas filter according to claim 1, characterized in that, A transparent observation window (29) is installed through the sealed door (28), and a human-machine interface is provided on the sealed door (28).

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