air purifier

Abstract

The present invention relates to the field of air purification technology, and specifically to an air purifier, comprising: a shell having an air inlet and an air outlet; a filtering device, arranged in the shell, comprising an annular membrane assembly and at least one internal membrane assembly arranged on the inner side of the annular membrane assembly, the annular membrane assembly and the internal membrane assembly are both suitable for air to pass through their side walls and be filtered, the interior of the internal membrane assembly forms a filtering channel with a top opening, and the periphery of the filtering channel forms an ash falling channel with a bottom opening; an acoustic wave dust cleaner, arranged in the shell, for removing pollutants on the annular membrane assembly and the internal membrane assembly, so that the pollutants fall through the ash falling channel.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and in particular to an air purifier. Background Art

[0002] With the rapid development of my country's economy, people have increasingly higher requirements for indoor office and residential environments, and have extremely high demands for indoor air quality. Currently, indoor air purification is mainly achieved through the use of composite air purifiers to improve office and residential environments. The use of composite air purification technologies can effectively improve air purification efficiency. Air purification technologies mainly focus on: using high-efficiency physical filters such as HEPA filters and activated carbon to absorb particulate pollutants suspended in the air; and removing toxic or harmful gases through chemical methods such as hydrogen peroxide technology, plasma technology, and photocatalytic technology to generate highly oxidizing free radicals.

[0003] When particulate pollutants in the air are filtered through purification technologies such as activated carbon and filter mesh, the pollutants will be enriched on the surface of the filter device, causing the wind resistance of the filter device to gradually increase and the filtration efficiency to decrease. Therefore, the filter device needs to be replaced regularly, which consumes a lot of materials. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the air purifier in the prior art that the filter device needs to be replaced regularly, resulting in a large amount of consumables, thereby providing an air purifier that does not require frequent replacement of the filter device.

[0005] In order to solve the above technical problems, the present invention provides an air purifier, comprising: a shell having an air inlet and an air outlet; a filtering device, arranged in the shell, comprising an annular membrane assembly and at least one internal membrane assembly arranged on the inner side of the annular membrane assembly, the annular membrane assembly and the internal membrane assembly are both suitable for air to pass through their side walls and be filtered, the interior of the internal membrane assembly forms a filtering channel with a top opening, and the periphery of the filtering channel forms an ash falling channel with a bottom opening; an acoustic wave dust cleaner, arranged in the shell, for removing pollutants on the annular membrane assembly and the internal membrane assembly, so that the pollutants fall through the ash falling channel.

[0006] Optionally, the internal membrane components are arranged in multiple rows, each row has multiple internal membrane components, and one internal membrane component in any row and any two internal membrane components in an adjacent row are arranged in a triangle.

[0007] Optionally, the annular membrane assembly includes a first membrane layer and a first support layer, and the inner membrane assembly includes a second membrane layer and a second support layer.

[0008] Optionally, the first membrane layer and the second membrane layer are both made of Al2O3, and the first support layer and the second support layer are both made of SiC.

[0009] Optionally, the air purifier also includes a hollow support column, which is arranged in the shell and supported below the filter device. The air inlet is opposite to the outer surface of the support column. There is a gap between the support column and the filter device and the side wall of the shell. The top periphery of the filter device is sealed with the side wall of the shell.

[0010] Optionally, the outer surface and the inner surface of the support column are smooth curved surfaces.

[0011] Optionally, the support column includes at least a main support section, the main support section is connected to the filter device, the outer diameter of the main support section gradually decreases from top to bottom, and the bottom of the shell is provided with an ash tray located outside the main support section.

[0012] Optionally, a dust concentration sensor is provided on the inner wall of the annular membrane assembly, and the air purifier further includes a controller, which is communicatively connected to the dust concentration sensor and can control the operation of the acoustic dust cleaner when the dust concentration sensor detects that the dust concentration is higher than a first preset value.

[0013] Optionally, an air duct connecting the top of the filter device and the air outlet is further provided in the shell, and the air duct includes a first pipe section close to the filter device. A first ultraviolet lamp is provided in the first pipe section, and the first ultraviolet lamp can emit ultraviolet light with a wavelength of 253.7nm for sterilization.

[0014] Optionally, the air duct also includes an intermediate pipe section arranged downstream of the first pipe section, and the intermediate pipe section is provided with a second ultraviolet lamp and a titanium dioxide catalytic layer. The second ultraviolet lamp can emit ultraviolet light with a wavelength of 185nm and cooperate with the titanium dioxide catalytic layer to generate ozone for decomposing organic gases.

[0015] Optionally, the air duct further includes a second pipe section arranged downstream of the middle pipe section, and the second pipe section is provided with a third ultraviolet lamp, which can emit ultraviolet light with a wavelength of 253.7nm to absorb ozone escaping from the middle pipe section.

[0016] Optionally, a first formaldehyde detection device is provided in the first pipe section, and the controller is communicatively connected with the first formaldehyde detection device and the second ultraviolet lamp. The controller can control the second ultraviolet lamp to operate when the formaldehyde concentration detected by the first formaldehyde detection device is greater than a second preset value.

[0017] Optionally, a first ozone detection device is provided downstream of the intermediate pipe section, and the controller is communicatively connected to the first ozone detection device and the third ultraviolet lamp. The controller can control the power of the third ultraviolet lamp to increase when the ozone concentration detected by the first ozone detection device is higher than a third preset value.

[0018] Optionally, a second formaldehyde detection device and a second ozone detection device are provided downstream of the second pipe section, and the controller is communicatively connected with the second formaldehyde detection device and the second ozone detection device, and controls the power of the second ultraviolet lamp according to the formaldehyde concentration detected by the second formaldehyde detection device, and controls the power of the third ultraviolet lamp according to the ozone concentration detected by the second ozone detection device.

[0019] Optionally, the middle pipe section is a horizontal pipe, and the first pipe section includes at least a closing connection section, a first vertical pipe section and a first curved pipe section from bottom to top, and the inner diameter of the closing connection section gradually decreases from bottom to top; and / or, the second pipe section includes a second curved pipe section and a second vertical section from bottom to top.

[0020] The technical solution of the present invention has the following advantages:

[0021] The air purifier provided by the present invention, when the air purifier is working, air enters the interior of the shell through the air inlet, flows around the filter device, and then passes through the annular membrane assembly and the internal membrane assembly in radial order for filtration. Large particles of pollutants in the air will be attached to the outside of the annular membrane assembly and the internal membrane assembly. The filtered air flows from the top opening to the air outlet after passing through the filter channel. When there are many pollutants attached to the annular membrane assembly and the internal membrane assembly, the sonic dust cleaner can be activated. The sonic dust cleaner emits a specific low-frequency (100-250Hz) and high-energy sound wave to act on the surface of the annular membrane assembly and the internal membrane assembly. The pollutants attached to the surface naturally fall off under the harmonic vibration of the sound wave and flow out from the bottom opening through the dust drop channel. Therefore, the pollutants attached to the annular membrane assembly and the internal membrane assembly can be removed, so that the annular membrane assembly and the internal membrane assembly remain unobstructed, ensuring the air purification efficiency, without the need to frequently replace the filter material, and can achieve the maximum improvement of air purification efficiency while minimizing consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1A cross-sectional view of an air purifier provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A top view of the filter device shown;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0026] Description of reference numerals:

[0027] 1. Shell; 2. Air inlet; 3. Filter device; 31. Annular membrane assembly; 311. First membrane layer; 312. First support layer; 32. Internal membrane assembly; 321. Second membrane layer; 322. Second support layer; 33. Connector; 34. Bottom opening; 35. Top opening; 4. Sonic dust cleaner; 5. Support column; 6. Ash receiving tray; 7. Dust concentration sensor; 8. First pipe section; 81. Closing connecting section; 82. First vertical pipe section; 83. First curved pipe section; 9. Second pipe section; 91. Second curved pipe section; 92. Second vertical section; 10. Intermediate pipe section; 11. First UV lamp; 12. Second UV lamp; 13. Third UV lamp; 14. Titanium dioxide catalytic layer; 15. First formaldehyde detection device; 16. First ozone detection device; 17. Second formaldehyde detection device; 18. Second ozone detection device. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example

[0033] With the rapid development of my country's economy, people have increasingly higher requirements for indoor office and residential environments, and have extremely high demands for indoor air quality. Currently, indoor air purification is mainly achieved through the use of composite air purifiers to improve office and residential environments. The use of composite air purification technologies can effectively improve air purification efficiency. Air purification technologies mainly focus on: using high-efficiency physical filters such as HEPA filters and activated carbon to absorb particulate pollutants suspended in the air; and removing toxic or harmful gases through chemical methods such as hydrogen peroxide technology, plasma technology, and photocatalytic technology to generate highly oxidizing free radicals.

[0034] When particulate pollutants in the air are filtered through purification technologies such as activated carbon and filter mesh, the pollutants will be enriched on the surface of the filter device, causing the wind resistance of the filter device to gradually increase and the filtration efficiency to decrease. Therefore, the filter device needs to be replaced regularly, which consumes a lot of materials.

[0035] Chemical methods can efficiently and thoroughly remove pollutants, odors, and foul smells from the air. However, if the chemicals used to decompose the pollutants and the harmful substances produced during the decomposition process are not properly handled, they can have a significant impact on the human body. For example, excessively high hydrogen peroxide concentrations can cause significant irritation to the skin, mucous membranes, and eyes. Sterilization and disinfection using plasma or photocatalytic technologies inevitably produces a certain amount of ozone. High concentrations of ozone can irritate the human respiratory tract, causing significant harm, such as difficulty breathing and decreased lung function.

[0036] To this end, this embodiment provides an air purifier.

[0037] In one embodiment, Figures 1 to 3As shown, the air purifier includes a housing 1, a filter device 3, and an acoustic dust collector 4. The housing 1 has an air inlet 2 and an air outlet; the filter device 3 is disposed within the housing 1 and includes an annular membrane assembly 31 and at least one internal membrane assembly 32 disposed inside the annular membrane assembly 31. Both the annular membrane assembly 31 and the internal membrane assembly 32 are adapted to filter air passing through their sidewalls. The interior of the internal membrane assembly 32 forms a filter channel with a top opening 35, and the periphery of the filter channel forms an ash drop channel with a bottom opening 34. The acoustic dust collector 4 is disposed within the housing 1 and is used to remove contaminants from the annular membrane assembly 31 and the internal membrane assembly 32, allowing the contaminants to fall through the ash drop channel.

[0038] In this embodiment, when the air purifier is working, air enters the shell 1 through the air inlet 2, and after flowing around the filter device 3, it passes through the annular membrane assembly 31 and the internal membrane assembly 32 in radial order for filtration. Large particle pollutants in the air will be attached to the outside of the annular membrane assembly 31 and the internal membrane assembly 32. The filtered air flows from the top opening 35 to the air outlet after passing through the filtration channel. When there are a lot of pollutants attached to the annular membrane assembly 31 and the internal membrane assembly 32, the sonic cleaner 4 can be put into operation. The sonic cleaner 4 emits specific low-frequency (100-250Hz) and high-energy sound waves to act on the surfaces of the annular membrane assembly 31 and the internal membrane assembly 32. The pollutants attached to their surfaces naturally fall off under the harmonic vibration of the sound waves and flow out from the bottom opening 34 through the ash dropping channel. Therefore, the pollutants attached to the annular membrane assembly 31 and the internal membrane assembly 32 can be removed, so that the annular membrane assembly 31 and the internal membrane assembly 32 remain in an unobstructed state, ensuring the air purification efficiency. There is no need to frequently replace the filter material, and the air purification efficiency can be maximized while minimizing consumables.

[0039] Specifically, when only one internal membrane assembly 32 is provided, the top of the annular membrane assembly 31 is closed and connected to the top of the internal membrane assembly 32 by a connector 33; when multiple internal membrane assemblies 32 are provided, the top of the annular membrane assembly 31 is closed and connected to the top of the internal membrane assembly 32 and the tops of two adjacent internal membrane assemblies 32 by a connector 33; the bottom of the filter device 3 is provided with a bottom opening 34 at a position opposite to the connector 33; the top of the internal membrane assembly 32 has a top opening 35, and the top opening 35 is connected to the air outlet fluid.

[0040] It should be noted that the top end of the internal membrane assembly 32 is open and the bottom end is closed, which can prevent dust and bacteria on the bottom side of the filter device 3 from being sucked back and mixed with the air filtered by the internal membrane assembly 32 to cause secondary pollution.

[0041] In a preferred embodiment, Figure 1 As shown, the acoustic wave cleaner 4 is fixed on the housing 1 and connected to the annular membrane assembly 31 .

[0042] It should be noted that the air purifier includes a fan to guide the flow of air. Figure 1 The fan is not shown in the figure, and those skilled in the art can reasonably set the position of the fan according to the technical solution of this application.

[0043] It should be noted that the material of the connecting member 33 can be selected so that air cannot pass through, such as injection molding material ABS, PLA, etc.

[0044] like Figure 1 As shown, the air inlet 2 is located on the peripheral wall of the housing 1 and close to the bottom, so that air can enter from all sides.

[0045] Based on the above embodiment, in a preferred embodiment, multiple rows of internal membrane assemblies 32 are provided, each row having multiple internal membrane assemblies 32, and one internal membrane assembly 32 in any row is arranged in a triangle with any two internal membrane assemblies 32 in an adjacent row. In this embodiment, by arranging one internal membrane assembly 32 in any row in a triangle with any two internal membrane assemblies 32 in an adjacent row, the internal membrane assemblies 32 are arranged compactly, allowing more internal membrane assemblies 32 to be arranged within the same area, thereby maximizing the use of the internal membrane assemblies 32 for air purification.

[0046] In a preferred embodiment, Figure 2 As shown, one internal membrane assembly 32 in any row and two internal membrane assemblies 32 in an adjacent row and adjacent to the internal membrane assembly 32 are arranged to form an equilateral triangle.

[0047] Based on the above embodiment, in a preferred embodiment, the annular membrane assembly 31 includes a first membrane layer 311 and a first support layer 312, and the internal membrane assembly 32 includes a second membrane layer 321 and a second support layer 322. In this embodiment, the provision of the first support layer 312 can ensure the hardness of the annular membrane assembly 31, thereby maintaining the shape of the annular membrane assembly 31, and the provision of the second support layer 322 can ensure the hardness of the internal membrane assembly 32, thereby maintaining the shape of the internal membrane assembly 32, and facilitate the connection between the internal membrane assembly 32 and the annular membrane assembly 31 and the internal membrane assembly 32 via the connector 33.

[0048] Specifically in one embodiment, the first supporting layer 312 is located inside the first film layer 311 , and the second supporting layer 322 is located inside the second film layer 321 .

[0049] Based on the above embodiment, in a preferred embodiment, both the first membrane layer 311 and the second membrane layer 321 are made of Al2O3, and both the first support layer 312 and the second support layer 322 are made of SiC. In this embodiment, the entire filter device 3 is an inorganic ceramic membrane, which facilitates the removal of contaminants attached thereto during operation of the acoustic wave dust cleaner 4.

[0050] In one specific embodiment, the annular membrane assembly 31 has an overall thickness of 2.5 mm to 3 mm, the micropores on the first support layer 312 have a pore size of 35 μm to 40 μm, and the first membrane layer 311 has a thickness of 10 μm, with the micropores on the first membrane layer 311 having a pore size of 5 μm. The internal membrane assembly 32 has an overall thickness of 0.8 mm to 1 mm, the micropores on the second support layer 322 have a pore size of 8 μm to 10 μm, and the second membrane layer 321 has a thickness of 5 μm, with the micropores on the second membrane layer 321 having a pore size of 2 μm. The micropores on the second support layer 322 have a smaller pore size than the micropores on the first support layer 312, and the micropores on the second membrane layer 321 have a smaller pore size than the micropores on the first membrane layer 311. Therefore, after filtration through the annular membrane assembly 31, the liquid is further filtered through the internal membrane assembly 32.

[0051] On the basis of the above embodiment, in a preferred embodiment, the air purifier further comprises a hollow support column 5, which is arranged in the housing 1 and supported below the filter device 3, the air inlet 2 is directly opposite to the outer surface of the support column 5, and there is a gap between the support column 5 and the filter device 3 and the side wall of the housing 1, and the top periphery of the filter device 3 is sealed with the side wall of the housing 1. In this embodiment, when air enters from the air inlet 2, large particles of matter will collide with the outer surface of the support column 5. Under the action of inertia, dust will slide down the outer surface of the support column 5, and the air mixed with small particles of pollutants and bacteria that have not fallen will continue to flow upward. When it reaches the outside of the annular membrane assembly 31, since the top periphery of the filter device 3 is sealed with the side wall of the housing 1, the air will not continue to flow upward, but will pass through the annular membrane assembly 31 and the inner membrane assembly 32 in a radial direction for filtration. The large particles of pollutants in the air will be attached to the outside of the annular membrane assembly 31 and the inner membrane assembly 32, and the filtered air will flow to the air outlet through the top opening 35. When air passes through the inner membrane assembly 32, particulate contaminants larger than 2 μm are filtered out. Since the support column 5 is hollow, when the acoustic wave cleaner 4 is operating, contaminants adhering to the surfaces of the annular membrane assembly 31 and the inner membrane assembly 32 naturally fall off due to the harmonic vibrations of the acoustic waves, falling downward from the bottom opening 34 and passing through the support column 5.

[0052] Based on the above embodiment, in a preferred embodiment, the outer and inner surfaces of the support column 5 are smoothly curved. In this embodiment, by making the outer and inner surfaces of the support column 5 smoothly curved, when particulate pollutants hit the outer surface of the support column 5, they can slide smoothly along the outer surface of the support column 5. When the sonic dust cleaner 4 is in operation, pollutants falling from the bottom opening 34 of the filter device 3 collide with the inner surface of the support column 5 and can slide smoothly along the inner surface of the support column 5.

[0053] Based on the above embodiment, in a preferred embodiment, the support column 5 includes at least a main support section, which is connected to the filter device 3 and has an outer diameter that gradually decreases from top to bottom. In this embodiment, by gradually decreasing the outer diameter of the main support section from top to bottom, particulate pollutants are more likely to slide down the surface of the support column 5. Furthermore, the support column 5 occupies less space within the housing 1, facilitating smooth air intake.

[0054] It should be noted that the support column 5 may include only the main support section, or may include the main support section and a column section located below the main support section, wherein the outer diameter of the column section gradually increases from top to bottom or remains unchanged.

[0055] Based on the above embodiment, in a preferred embodiment, the housing 1 is provided with an ash tray 6 located at the periphery of the main support section. In this embodiment, the ash tray 6 can receive particulate pollutants that slide down from the outer surface and inner side of the support column 5.

[0056] In a preferred embodiment, the ash tray 6 is detachably connected to the housing 1, so that the ash tray 6 can be removed from the housing 1 for cleaning. In an alternative embodiment, the ash tray 6 is hinged to the housing 1, and the ash tray 6 can be rotated downward to clean it.

[0057] On the basis of the above embodiment, in a preferred embodiment, a dust concentration sensor 7 is provided on the inner wall of the annular membrane assembly 31, and the air purifier further comprises a controller, which is in communication with the dust concentration sensor 7 and can control the sonic cleaner 4 to operate when the dust concentration sensor 7 detects that the dust concentration is higher than a first preset value. In this embodiment, by providing the dust concentration sensor 7 and the controller, when the dust concentration sensor 7 detects that the dust concentration is higher than the first preset value, that is, when a certain amount of dust accumulates on the surface of the annular membrane assembly 31, the controller automatically controls the sonic cleaner 4 to operate without the need for additional user operation, thereby enhancing the user experience. Among them, the first preset value can specifically be 10mg / m 3 .

[0058] Based on the above embodiment, in a preferred embodiment, an air duct is further provided within the housing 1, connecting the top of the filter device 3 with the air outlet. The air duct includes a first pipe section 8 proximate to the filter device, within which a first ultraviolet lamp 11 is disposed. The first ultraviolet lamp 11 is capable of emitting ultraviolet light with a wavelength of 253.7 nm for sterilization. In this embodiment, by providing the first pipe section 8 and the first ultraviolet lamp 11 within the first pipe section 8, bacteria and odors in the air filtered by the filter device 3 can be further efficiently eliminated.

[0059] Based on the above embodiment, in a preferred embodiment, the air duct further includes an intermediate pipe section 10 disposed downstream of the first pipe section 8. The intermediate pipe section 10 is equipped with a second UV lamp 12 and a titanium dioxide catalytic layer 14. The second UV lamp 12 is capable of emitting ultraviolet light with a wavelength of 185 nm and cooperates with the titanium dioxide catalytic layer 14 to generate ozone for decomposing organic gases. In this embodiment, the intermediate pipe section 10 forms an ozone oxidation chamber, decomposing H2O and O2 in the air into highly oxidizing free radicals, which in turn produce O3. O3 is used to remove gaseous pollutants such as formaldehyde and benzene from the air. Furthermore, ozone can react with odorous gases such as ammonia, hydrogen sulfide, and sulfide alcohols, effectively removing odors from the air. Coating the walls of the intermediate pipe section 10 with the titanium dioxide catalytic layer 14 accelerates the ozone decomposition of volatile organic gas molecules in the air.

[0060] Based on the above embodiment, in a preferred embodiment, the air duct further includes a second pipe section disposed downstream of the intermediate pipe section, the second pipe section being provided with a third ultraviolet lamp capable of emitting ultraviolet light with a wavelength of 253.7 nm for absorbing ozone escaping from the intermediate pipe section. In this embodiment, the ultraviolet light emitted by the first ultraviolet lamp 11 is easily absorbed by the DNA of an organism, changing the DNA structure within the organism, thereby effectively disinfecting bacteria in the air; the second ultraviolet lamp 12 is disposed in the intermediate pipe section 10, so that the intermediate pipe section 10 forms an ozone oxidation chamber, decomposing H2O and O2 in the air into highly oxidizing free radicals, thereby generating O3, which is used to remove gaseous pollutants such as formaldehyde and benzene from the air. In addition, ozone can react with odorous gases such as ammonia, hydrogen sulfide, and sulfide alcohols, effectively removing odors from the air; the ultraviolet light emitted by the third ultraviolet lamp 13 can absorb the incompletely reacted O3, ensuring that the ozone content in the air ultimately discharged from the air purifier is low.

[0061] Specifically in one embodiment, the first ultraviolet lamp 11 and the third ultraviolet lamp 13 are both hemispherical.

[0062] Based on the above embodiment, in a preferred embodiment, a first formaldehyde detection device 15 is provided in the first pipe section 8, and a controller is in communication with the first formaldehyde detection device 15 and the second ultraviolet lamp 12. The controller is capable of controlling the second ultraviolet lamp 12 to operate when the formaldehyde concentration detected by the first formaldehyde detection device 15 is greater than a second preset value. In this embodiment, by providing the first formaldehyde detection device 15, the controller is in communication with the first formaldehyde detection device 15 and the second ultraviolet lamp 12. When the formaldehyde concentration detected by the first formaldehyde detection device 15 is greater than the second preset value, the controller automatically controls the second ultraviolet lamp 12 to operate to produce a corresponding concentration of O3 to eliminate formaldehyde.

[0063] In one embodiment, the second preset value is 0.08 mg / m 3 .

[0064] Based on the above embodiment, in a preferred embodiment, a first ozone detection device 16 is provided downstream of the intermediate pipe section 10. A controller is in communication with the first ozone detection device 16 and the third ultraviolet lamp 13. The controller is capable of increasing the power of the third ultraviolet lamp 13 when the ozone concentration detected by the first ozone detection device 16 exceeds a third preset value. In this embodiment, the first ozone detection device 16 is used to detect the concentration of O3 after treatment in the ozone oxidation chamber. When the detected O3 concentration exceeds the third preset value, the power of the third ultraviolet lamp 13 is controlled to increase to ensure that the O3 concentration in the discharged air meets the standard.

[0065] In one embodiment, the third preset value is 0.10 mg / m 3 .

[0066] Based on the above embodiment, in a preferred embodiment, a second formaldehyde detection device 17 and a second ozone detection device 18 are provided downstream of the second pipe section 9. The controller is in communication with the second formaldehyde detection device 17 and the second ozone detection device 18 and controls the power of the second ultraviolet lamp 12 based on the formaldehyde concentration detected by the second formaldehyde detection device 17, and controls the power of the third ultraviolet lamp 13 based on the ozone concentration detected by the second ozone detection device 18. In this embodiment, by providing the second formaldehyde detection device 17 and the second ozone detection device 18 downstream of the second pipe section 9, when the exhaust gas does not meet the requirements, the power of the first ultraviolet lamp 11, the second ultraviolet lamp 12, and the third ultraviolet lamp 13 can be controlled and adjusted to ensure that the exhaust gas meets the requirements.

[0067] Based on the above embodiment, in a preferred embodiment, the middle pipe section 10 is a horizontal pipe, and the first pipe section 8 includes, from bottom to top, at least a closing connecting section 81, a first vertical pipe section 82, and a first curved pipe section 83, with the inner diameter of the closing connecting section 81 gradually decreasing from bottom to top; and / or, the second pipe section 9 includes, from bottom to top, a second curved pipe section 91 and a second vertical section 92, with the top of the second vertical section 92 being the air outlet or near the air outlet. In this embodiment, the provision of the closing connecting section 81 can increase air velocity, and the provision of the first curved pipe section 83 and the second curved pipe section 91 extends the air flow path, thereby fully purifying the air and ensuring the air purification effect.

[0068] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An air purifier, characterized in that: include: A housing (1) having an air inlet (2) and an air outlet; A filter device (3) is arranged in the housing (1), comprising an annular membrane assembly (31) and at least one internal membrane assembly (32) arranged inside the annular membrane assembly (31), wherein the annular membrane assembly (31) and the internal membrane assembly (32) are both suitable for allowing air to pass through their side walls and filter air, a filter channel having a top opening (35) is formed inside the internal membrane assembly (32), and an ash drop channel having a bottom opening (34) is formed around the filter channel; An acoustic wave dust collector (4) is arranged in the shell (1) and is used to remove pollutants on the annular membrane assembly (31) and the internal membrane assembly (32) so that the pollutants fall through the dust dropping channel. The internal membrane assembly (32) is provided in multiple rows, each row has multiple internal membrane assemblies (32), and one of the internal membrane assemblies (32) in any row is arranged in a triangle with any two internal membrane assemblies (32) in the adjacent row.

2. The air purifier according to claim 1, characterized in that The annular membrane assembly (31) includes a first membrane layer (311) and a first support layer (312), and the internal membrane assembly (32) includes a second membrane layer (321) and a second support layer (322).

3. The air purifier according to claim 2, characterized in that The first film layer (311) and the second film layer (321) are both made of Al2O3, and the first support layer (312) and the second support layer (322) are both made of SiC.

4. The air purifier according to any one of claims 1 to 3, characterized in that: The air purifier further comprises a hollow support column (5), the support column (5) being arranged in the housing (1) and supported below the filter device (3), the air inlet (2) being directly opposite to the outer surface of the support column (5), a gap being provided between the support column (5) and the filter device (3) and the side wall of the housing (1), and the top periphery of the filter device (3) being sealedly connected to the side wall of the housing (1).

5. The air purifier according to claim 4, characterized in that The outer surface and inner surface of the support column (5) are smooth curved surfaces.

6. The air purifier according to claim 4, characterized in that The support column (5) comprises at least a main support section, the main support section is connected to the filter device (3), the outer diameter of the main support section gradually decreases from top to bottom, and the bottom of the shell (1) is provided with an ash receiving tray (6) located on the periphery of the main support section.

7. The air purifier according to any one of claims 1 to 3, characterized in that: A dust concentration sensor (7) is provided on the inner wall of the annular membrane assembly (31), and the air purifier further comprises a controller, which is in communication with the dust concentration sensor (7) and can control the sonic cleaner (4) to operate when the dust concentration sensor (7) detects that the dust concentration is higher than a first preset value.

8. The air purifier according to claim 7, characterized in that An air duct connecting the top of the filter device (3) and the air outlet is further provided in the housing (1), the air duct comprising a first pipe section (8) close to the filter device (3), a first ultraviolet lamp (11) being provided in the first pipe section (8), and the first ultraviolet lamp (11) being capable of emitting ultraviolet light with a wavelength of 253.7 nm for sterilization.

9. The air purifier according to claim 8, characterized in that The air duct further comprises an intermediate pipe section (10) arranged downstream of the first pipe section (8); the intermediate pipe section (10) is provided with a second ultraviolet lamp (12) and a titanium dioxide catalytic layer (14); the second ultraviolet lamp (12) is capable of emitting ultraviolet light with a wavelength of 185 nm and cooperates with the titanium dioxide catalytic layer (14) to generate ozone for decomposing organic gases.

10. The air purifier according to claim 9, characterized in that The air duct further comprises a second pipe section (9) arranged downstream of the intermediate pipe section (10); the second pipe section (9) is provided with a third ultraviolet lamp (13); the third ultraviolet lamp (13) is capable of emitting ultraviolet light with a wavelength of 253.7 nm, and is used to absorb ozone escaping from the intermediate pipe section (10).

11. The air purifier according to claim 9, characterized in that A first formaldehyde detection device (15) is provided in the first pipe section (8), and the controller is in communication connection with the first formaldehyde detection device (15) and the second ultraviolet lamp (12). The controller is capable of controlling the second ultraviolet lamp (12) to operate when the formaldehyde concentration detected by the first formaldehyde detection device (15) is greater than a second preset value.

12. The air purifier according to claim 10, characterized in that A first ozone detection device (16) is provided downstream of the intermediate pipe section (10), and the controller is in communication with the first ozone detection device (16) and the third ultraviolet lamp (13). When the ozone concentration detected by the first ozone detection device (16) is higher than a third preset value, the controller can control the power of the third ultraviolet lamp (13) to increase.

13. The air purifier according to claim 10, characterized in that A second formaldehyde detection device (17) and a second ozone detection device (18) are provided downstream of the second pipe section (9); the controller is in communication with the second formaldehyde detection device (17) and the second ozone detection device (18), and controls the power of the second ultraviolet lamp (12) according to the formaldehyde concentration detected by the second formaldehyde detection device (17), and controls the power of the third ultraviolet lamp (13) according to the ozone concentration detected by the second ozone detection device (18).

14. The air purifier according to claim 10, characterized in that The intermediate pipe section (10) is a horizontal pipe, the first pipe section (8) comprises at least a closing connecting section (81), a first vertical pipe section (82) and a first curved pipe section (83) in sequence from bottom to top, and the inner diameter of the closing connecting section (81) gradually decreases from bottom to top; and / or the second pipe section (9) comprises a second curved pipe section (91) and a second vertical section (92) in sequence from bottom to top.

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