CN219120730U

CN219120730U - Air purifier

Info

Publication number: CN219120730U
Application number: CN202320477347.XU
Authority: CN
Inventors: 陈文杰; 胡新宇; 赵建安; 曾梓轩
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-03-13
Filing date: 2023-03-13
Publication date: 2023-06-02
Anticipated expiration: 2033-03-13

Abstract

The utility model relates to the technical field of air purification, in particular to an air purifier, which comprises the following components: the shell is provided with an air inlet and an air outlet; the filtering device is arranged in the shell and comprises an annular membrane component and at least one inner membrane component arranged on the inner side of the annular membrane component, the annular membrane component and the inner membrane component are both suitable for air to pass through the side wall of the annular membrane component and filter, a filtering channel with a top opening is formed in the inner membrane component, and an ash falling channel with a bottom opening is formed on the periphery of the filtering channel; the sound wave ash remover is arranged in the shell and is used for removing pollutants on the annular membrane component and the inner membrane component so that the pollutants fall through the ash falling channel.

Description

Air purifier

Technical Field

The utility model relates to the technical field of air purification, in particular to an air purifier.

Background

With the high-speed development of Chinese economy, people have higher and higher requirements on indoor office and living environment, and have higher requirements on indoor air quality. At present, indoor air is mainly purified through a combined type air purifier to improve office environment and living environment, the efficiency of air purification can be practically improved by purifying the air through a combined type air purification technology, and the air purification technology is mainly concentrated in: the particle pollutants suspended in the air are adsorbed by utilizing efficient physical filtration such as a HEPA filter screen, active carbon and the like, and toxic or harmful gases such as hydrogen peroxide technology, plasma technology, photocatalysis technology and the like are removed by generating free radicals with strong oxidability through a chemical method.

When the granular pollutants in the air are filtered through the purification technologies such as activated carbon, a filter screen and the like, the pollutants are enriched on the surface of the filter device, so that the wind resistance of the filter device is gradually increased, the filtering efficiency is reduced, and therefore, the filter device needs to be replaced regularly, and the consumable is large.

Disclosure of Invention

Therefore, the utility model aims to overcome the defect of large material consumption caused by the fact that the filter device needs to be replaced regularly in the air purifier in the prior art, and further provides the air purifier without the need of replacing the filter device frequently.

In order to solve the above technical problems, the present utility model provides an air purifier, comprising: the shell is provided with an air inlet and an air outlet; the filtering device is arranged in the shell and comprises an annular membrane component and at least one inner membrane component arranged on the inner side of the annular membrane component, the annular membrane component and the inner membrane component are both suitable for air to pass through the side wall of the annular membrane component and filter, a filtering channel with a top opening is formed in the inner membrane component, and an ash falling channel with a bottom opening is formed on the periphery of the filtering channel; the sound wave ash remover is arranged in the shell and is used for removing pollutants on the annular membrane component and the inner membrane component so that the pollutants fall through the ash falling channel.

Optionally, the inner membrane modules are provided with a plurality of rows, each row is provided with a plurality of inner membrane modules, and one inner membrane module in any one row and any two inner membrane modules in adjacent rows are arranged into a triangle.

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.

Optionally, the first film layer and the second film layer are both made of Al ₂ O ₃ The first support layer and the second support layer are made of SiC.

Optionally, the air purifier further comprises a hollow support column, the support column is arranged in the shell and supported below the filtering device, the air inlet is opposite to the outer surface of the support column, gaps are formed between the support column, the filtering device and the side wall of the shell, and the top periphery of the filtering device is in sealing connection with the side wall of the shell.

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

Optionally, the support column at least comprises a main support section, the main support section is connected with the filtering 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 receiving disc positioned at the periphery of the main support section.

Optionally, the inner wall of cyclic annular membrane module is equipped with dust concentration sensor, air purifier still includes the controller, the controller with dust concentration sensor communication connection can be in when dust concentration sensor detects that dust concentration is higher than first default, control sonic wave ash cleaner work.

Optionally, still be equipped with in the casing and connect filter equipment top with the wind channel of air outlet, the wind channel is including being close to filter equipment's first pipeline section, be provided with first ultraviolet lamp in the first pipeline section, first ultraviolet lamp can send the ultraviolet ray that the wavelength is 253.7nm and be used for disinfecting.

Optionally, the air duct further comprises a middle pipe section arranged at the downstream of the first pipe section, the middle pipe section is provided with a second ultraviolet lamp and a titanium dioxide catalytic layer, and the second ultraviolet lamp can emit ultraviolet light with the wavelength of 185nm and is matched with the titanium dioxide catalytic layer to generate ozone for decomposing organic gas.

Optionally, the air duct further comprises a second pipe section arranged at the downstream of the middle pipe section, and the second pipe section is provided with a third ultraviolet lamp capable of emitting ultraviolet light with the wavelength of 253.7nm and used for absorbing ozone escaping from the middle pipe section.

Optionally, be equipped with first formaldehyde detection device in the first pipeline section, the controller with first formaldehyde detection device the second ultraviolet lamp communication connection, the controller can be when formaldehyde concentration that first formaldehyde detection device detected is greater than the second default, control the work of second ultraviolet lamp.

Optionally, a first ozone detecting device is arranged at the downstream of the middle pipe section, the controller is in communication connection with the first ozone detecting device and the third ultraviolet lamp, and the controller can control the power of the third ultraviolet lamp to increase when the concentration of ozone detected by the first ozone detecting device is higher than a third preset value.

Optionally, a second formaldehyde detection device and a second ozone detection device are arranged at the downstream of the second pipe section, the controller is in communication connection 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.

Optionally, the middle pipe section is a horizontal pipe, the first pipe section at least comprises a closing-in connecting section, a first vertical pipe section and a first bent pipe section from bottom to top in sequence, and the inner diameter of the closing-in connecting section is gradually reduced from bottom to top; and/or the second pipe section comprises a second bent pipe section and a second vertical section from bottom to top.

The technical scheme of the utility model has the following advantages:

when the air purifier provided by the utility model works, air enters the shell through the air inlet, and after flowing around the filtering device, the air sequentially passes through the annular membrane component and the inner membrane component in the radial direction to be filtered, large particle pollutants in the air can be attached to the outside of the annular membrane component and the inner membrane component, and the filtered air flows to the air outlet from the top opening after passing through the filtering channel. When the pollutants attached to the annular membrane component and the inner membrane component are more, the sound wave ash remover can work, the sound wave ash remover emits sound waves with specific low frequency (100-250 Hz) and high energy to act on the surfaces of the annular membrane component and the inner membrane component, and the pollutants attached to the surfaces naturally fall off under the harmonic vibration of the sound waves and flow out from the bottom opening through the ash falling channel, so that the pollutants attached to the annular membrane component and the inner membrane component can be removed, the annular membrane component and the inner membrane component are kept in an unblocked state, the air purification efficiency is ensured, the filter materials do not need to be replaced frequently, and the maximized improvement of the air purification efficiency can be realized while the consumable is minimum.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of an air purifier provided in an embodiment of the present utility model;

FIG. 2 is a top view of the filter device shown in FIG. 1;

fig. 3 is an enlarged view at a in fig. 2.

Reference numerals illustrate:

1. a housing; 2. an air inlet; 3. a filtering device; 31. an annular membrane assembly; 311. a first film layer; 312. a first support layer; 32. an inner membrane assembly; 321. a second film layer; 322. a second support layer; 33. a connecting piece; 34. a bottom opening; 35. a top opening; 4. a sonic ash cleaner; 5. a support column; 6. an ash receiving tray; 7. a dust concentration sensor; 8. a first pipe section; 81. closing up the connecting section; 82. a first vertical tube section; 83. a first bend section; 9. a second pipe section; 91. a second bend section; 92. a second vertical section; 10. a middle pipe section; 11. a first ultraviolet lamp; 12. a second ultraviolet lamp; 13. a third ultraviolet lamp; 14. a titanium dioxide catalytic layer; 15. a first formaldehyde detection device; 16. a first ozone detecting device; 17. a second formaldehyde detection device; 18. and a second ozone detecting device.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Examples

The pollutants, peculiar smell and odor in the air can be efficiently and thoroughly decomposed by using a chemical method, but if chemical substances for decomposing the pollutants and harmful substances generated in the decomposition process are not treated, the substances have great influence on human bodies. If the concentration of the hydrogen peroxide is too high, the skin, mucous membrane, eyes and the like of a human body are greatly stimulated, a certain amount of ozone is inevitably generated by sterilizing and disinfecting through a plasma technology or a photocatalysis technology, and the high concentration of the ozone stimulates the respiratory tract of the human body to cause serious harm such as dyspnea, lung function decline and the like.

To this end, the present embodiment provides an air cleaner.

In one embodiment, as shown in fig. 1 to 3, the air cleaner includes a housing 1, a filter device 3, and a sonic ash cleaner 4. Wherein, the shell 1 is provided with an air inlet 2 and an air outlet; the filtering device 3 is arranged in the shell 1 and comprises an annular membrane component 31 and at least one inner membrane component 32 arranged on the inner side of the annular membrane component 31, wherein the annular membrane component 31 and the inner membrane component 32 are suitable for air to pass through the side wall of the annular membrane component and filter, a filtering channel with a top opening 35 is formed in the inner part of the inner membrane component 32, and an ash falling channel with a bottom opening 34 is formed on the periphery of the filtering channel; the sonic ash remover 4 is disposed in the housing 1 for removing contaminants on the annular membrane module 31 and the inner membrane module 32 so that the contaminants fall through the ash falling passage.

In this embodiment, when the air purifier works, air enters the casing 1 through the air inlet 2, flows around the filtering device 3, then sequentially passes through the annular membrane assembly 31 and the inner membrane assembly 32 along the radial direction for filtering, large particle pollutants in the air are attached to the outside of the annular membrane assembly 31 and the inner membrane assembly 32, and the filtered air flows from the top opening 35 to the air outlet after passing through the filtering channel. When more pollutants are attached to the annular membrane component 31 and the inner membrane component 32, the sonic ash remover 4 can work, the sonic ash remover 4 emits specific low-frequency (100-250 Hz) high-energy sonic waves to act on the surfaces of the annular membrane component 31 and the inner membrane component 32, and the pollutants attached to the surfaces naturally fall off under the harmonic vibration of the sonic waves and flow out of the bottom opening 34 through the ash falling channel, so that the pollutants attached to the annular membrane component 31 and the inner membrane component 32 can be removed, the annular membrane component 31 and the inner membrane component 32 can be kept in an unblocked state, the air purification efficiency is ensured, the filter materials do not need to be replaced frequently, and the maximized air purification efficiency improvement can be realized while the consumable is minimized.

Specifically, when the inner membrane modules 32 are provided only one, the top of the annular membrane module 31 is closely connected with the top of the inner membrane module 32 by the connecting member 33, when the inner membrane modules 32 are provided in plurality, the top of the annular membrane module 31 is closely connected with the top of the inner membrane module 32 and the tops of the adjacent two inner membrane modules 32 by the connecting member 33, the bottom of the filter device 3 is provided with the bottom opening 34 at a position facing the connecting member 33, the top end of the inner membrane module 32 is provided with the top opening 35, and the top opening 35 is in fluid communication with the air outlet.

The top end of the inner membrane module 32 is opened, and the bottom end is closed, so that dust and bacteria on the lower side of the filter device 3 can be prevented from being sucked backwards and mixed with air filtered by the inner membrane module 32 to cause secondary pollution.

In a preferred embodiment, as shown in FIG. 1, the sonic ash remover 4 is secured to the housing 1 and is connected to the annular membrane module 31.

It should be noted that, the air purifier includes a fan to guide the air flow direction, the fan is not shown in fig. 1, and a person skilled in the art may reasonably set the position of the fan according to the technical scheme of the present application.

The material of the connector 33 may be selected such that air cannot pass therethrough, for example, injection molding material ABS, PLA, or the like.

As shown in fig. 1, the air inlet 2 is located on the peripheral wall of the casing 1 and near the bottom, so that air intake around can be realized.

On the basis of the above embodiment, in a preferred embodiment, the inner membrane modules 32 are provided in a plurality of rows, each having a plurality of inner membrane modules 32, and one of the inner membrane modules 32 of any one row is arranged in a triangle with any two of the inner membrane modules 32 of an adjacent row. In this embodiment, by arranging one of the inner membrane modules 32 of any one row and any two of the inner membrane modules 32 of the adjacent row in a triangle, each of the inner membrane modules 32 is compactly arranged, and more inner membrane modules 32 can be arranged in the same area, so that the air can be purified by using the inner membrane modules 32 to the maximum.

In a preferred embodiment, as shown in FIG. 2, one of the inner membrane modules 32 in any one row is arranged in an equilateral triangle with two inner membrane modules 32 in an adjacent row and adjacent to the inner membrane module 32.

On the basis of the above embodiment, in a preferred embodiment, the annular membrane module 31 includes the first membrane layer 311 and the first support layer 312, and the inner membrane module 32 includes the second membrane layer 321 and the second support layer 322. In this embodiment, the first support layer 312 is provided to secure the rigidity of the annular membrane module 31, thereby maintaining the shape of the annular membrane module 31, and the second support layer 322 is provided to secure the rigidity of the inner membrane module 32, thereby maintaining the shape of the inner membrane module 32, and facilitating the connection between the inner membrane module 32 and the annular membrane module 31, the inner membrane module 32 via the connection member 33.

In particular, in one embodiment, the first support layer 312 is located inside the first film layer 311, and the second support layer 322 is located inside the second film layer 321.

On the basis of the above embodiment, in a preferred embodiment, both the first film 311 and the second film 321 are made of Al ₂ O ₃ Made, first support layer 312 and second support layer 322 are both made of SiC. In this embodiment, the filter 3 is an inorganic ceramic membrane as a whole, which is advantageous for the removal of contaminants adhering thereto when the sonic ash cleaner 4 is in operation.

In one embodiment, the overall thickness of the annular membrane module 31 is 2.5mm to 3mm, the pore diameter of the micropores on the first support layer 312 is 35 μm to 40 μm, the thickness of the first membrane layer 311 is 10 μm, and the pore diameter of the micropores on the first membrane layer 311 is 5 μm; the overall thickness of the inner membrane module 32 is 0.8mm-1mm, the pore size of the micropores in the second support layer 322 is 8 μm-10 μm, the thickness of the second membrane layer 321 is 5 μm, and the pore size of the micropores in the second membrane layer 321 is 2 μm. The pore size of the micropores of the second support layer 322 is smaller than that of the micropores of the first support layer 312, and the pore size of the micropores of the second membrane layer 321 is smaller than that of the micropores of the first membrane layer 311, so that the filter is further filtered by the inner membrane assembly 32 after being filtered by the annular membrane assembly 31.

On the basis of the above embodiment, in a preferred embodiment, the air purifier further includes a hollow support column 5, the support column 5 is disposed in the housing 1 and supported below the filtering device 3, the air inlet 2 is opposite to the outer surface of the support column 5, gaps are formed between the support column 5 and the filtering device 3 and the side wall of the housing 1, and the top periphery of the filtering device 3 is connected with the side wall of the housing 1 in a sealing manner. In this embodiment, when air enters from the air inlet 2, large particulate matters collide with the outer surface of the support column 5, dust slides down along the outer surface of the support column 5 under the action of inertia, air mixed with non-falling small particulate pollutants and bacteria continues to flow upwards, and after reaching the outer side of the annular membrane assembly 31, the air does not continue to flow upwards because the top periphery of the filtering device 3 is in sealing connection with the side wall of the casing 1, but passes through the annular membrane assembly 31 and the inner membrane assembly 32 in sequence in the radial direction for filtering, the large particulate pollutants in the air are attached outside the annular membrane assembly 31 and the inner membrane assembly 32, and the filtered air flows to the air outlet through the top opening 35. As the air passes through the inner membrane module 32, particulate contaminants greater than 2 μm in the air are filtered out. Since the support column 5 is of a hollow structure, when the sonic ash remover 4 is in operation, contaminants adhering to the surfaces of the annular membrane assembly 31 and the inner membrane assembly 32 naturally fall off under harmonic vibration of the sonic waves and fall down from the bottom opening 34 and pass through the support column 5.

On the basis of 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 surface and the inner surface of the support column 5 smoothly curved, when the particulate contaminant hits the outer surface of the support column 5, it can smoothly slide down the outer surface of the support column 5, and when the sonic ash cleaner 4 operates, the contaminant falling from the bottom opening 34 of the filter device 3 hits the inner surface of the support column 5, it can smoothly slide down the inner surface of the support column 5.

On the basis of the above embodiment, in a preferred embodiment, the support column 5 comprises at least a main support section, which is connected to the filter device 3, the outer diameter of which main support section decreases gradually from top to bottom. In this embodiment, by tapering the outer diameter of the main support section from top to bottom, it is more advantageous for the particulate contaminants to slide down the surface of the support column 5. Meanwhile, the space occupied by the support column 5 in the shell 1 is small, and smooth air intake is facilitated.

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

On the basis of the above-described embodiments, 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 may hold particulate contaminants that slide off the outer surface as well as the inner side of the support column 5.

In a preferred embodiment, the ash tray 6 is detachably connected to the housing 1, facilitating removal of the ash tray 6 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 downwards to clean it.

On the basis of the above embodiment, in a preferred embodiment, the inner wall of the annular membrane module 31 is provided with the dust concentration sensor 7, and the air purifier further includes a controller, which is communicatively connected to the dust concentration sensor 7, and can control the sonic ash 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, through setting up dust concentration sensor 7 and controller, when dust concentration sensor 7 detects that dust concentration is higher than first default, namely when certain dust is accumulated on annular membrane module 31 surface, the controller automatic control sound wave ash cleaner 4 work, need not the extra operation of user, more can promote user experience and feel. Wherein the first preset value may be 10mg/m ³ 。

On the basis of the above embodiment, in a preferred embodiment, an air duct connecting the top of the filtering device 3 with the air outlet is further provided in the housing 1, the air duct includes a first pipe section 8 near the filtering device, a first ultraviolet lamp 11 is provided in the first pipe section, and the first ultraviolet lamp 11 can emit ultraviolet light with a wavelength of 253.7nm for sterilization. In this embodiment, bacteria and odor in the air filtered by the filtering device 3 can be further killed and removed with high efficiency by providing the first pipe section 8 and the first ultraviolet lamp 11 in the first pipe section 8.

On the basis of the above embodiment, in a preferred embodiment, 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, and the second ultraviolet lamp 12 can emit ultraviolet light with a wavelength of 185nm and generate ozone for decomposing organic gases in cooperation with the titanium dioxide catalytic layer 14. In this embodiment, the intermediate pipe section 10 forms an ozonation chamber to allow H in the air ₂ O、O ₂ To be decomposed into free radicals with extremely strong oxidizing power, thereby generating O ₃ By O ₃ In addition, ozone can react with odor gases such as ammonia, hydrogen sulfide and sulfureted alcohol, so that the odor in the air can be effectively removed, and the wall of the middle pipe section 10 is coated with the titanium dioxide catalytic layer 14, so that the ozone can be accelerated to decompose volatile organic gas molecules in the air.

On the basis of the above embodiment, in a preferred embodiment, the air duct further comprises a second pipe section arranged downstream of the intermediate pipe section, and the second pipe section is provided with a third ultraviolet lamp capable of emitting ultraviolet light with a wavelength of 253.7nm for absorbing ozone escaping from the intermediate pipe section. In this embodiment, the ultraviolet light emitted from the first ultraviolet lamp 11 is easily absorbed by the DNA of the living body, and changes the DNA structure in the living body, so that bacteria in the air can be effectively killed; a second ultraviolet lamp 12 is arranged on the middle pipe section 10 to make the middle pipe section 10 form ozoneOxidation chamber for making H in air ₂ O、O ₂ To be decomposed into free radicals with extremely strong oxidizing power, thereby generating O ₃ By O ₃ The formaldehyde, benzene and other gas pollutants in the air are removed, in addition, ozone can react with ammonia, hydrogen sulfide, sulfureted alcohol and other odor gases, and the odor in the air can be effectively removed; the ultraviolet light emitted by the third ultraviolet lamp 13 can absorb the O which is not completely reacted ₃ The ozone content in the air finally discharged to the outside of the air purifier is ensured to be lower.

Specifically, in one embodiment, the first ultraviolet lamp 11 and the third ultraviolet lamp 13 are each hemispherical.

On the basis of the above embodiment, in a preferred embodiment, the first formaldehyde detecting device 15 is disposed in the first pipe section 8, the controller is connected to the first formaldehyde detecting device 15 and the second ultraviolet lamp 12 in a communication manner, and the controller can control the second ultraviolet lamp 12 to operate when the formaldehyde concentration detected by the first formaldehyde detecting device 15 is greater than a second preset value. In this embodiment, by providing the first formaldehyde detecting device 15, the controller is in communication connection with the first formaldehyde detecting device 15 and the second ultraviolet lamp 12, and when the formaldehyde concentration detected by the first formaldehyde detecting device 15 is greater than the second preset value, the controller automatically controls the second ultraviolet lamp 12 to work to generate O with a corresponding concentration ₃ And (3) sterilizing formaldehyde.

In particular, in one embodiment, the second preset value is 0.08mg/m ³ 。

In addition to the above embodiment, in a preferred embodiment, the first ozone detecting device 16 is disposed downstream of the middle pipe section 10, and the controller is communicatively connected to the first ozone detecting device 16 and the third ultraviolet lamp 13, and can control the power of the third ultraviolet lamp 13 to increase when the concentration of ozone detected by the first ozone detecting device 16 is higher than a third preset value. In this embodiment, the first ozone detecting device 16 is used to detect O after being treated by the ozone oxidation chamber ₃ Concentration of O when detected ₃ When the concentration is higher than a third preset value, the power of the third ultraviolet lamp 13 is controlled to be increased so as to ensure that O in the discharged air ₃ Concentration compliance standardQuasi-.

In particular, in one embodiment, the third preset value is 0.10mg/m ³ 。

On the basis of the above embodiment, in a preferred embodiment, the second formaldehyde detecting device 17 and the second ozone detecting device 18 are arranged at the downstream of the second pipe section 9, and the controller is in communication connection with the second formaldehyde detecting device 17 and the second ozone detecting device 18, and controls the power of the second ultraviolet lamp 12 according to the formaldehyde concentration detected by the second formaldehyde detecting device 17, and controls the power of the third ultraviolet lamp 13 according to the ozone concentration detected by the second ozone detecting device 18. In this embodiment, by providing the second formaldehyde detecting device 17 and the second ozone detecting device 18 downstream of the second pipe section 9, when the exhaust gas is not satisfactory, 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 is satisfactory.

Based on the above embodiment, in a preferred embodiment, the middle pipe section 10 is a horizontal pipe, the first pipe section 8 includes at least a closing-in connection section 81, a first vertical pipe section 82 and a first curved pipe section 83 sequentially from bottom to top, and the inner diameter of the closing-in connection section 81 gradually decreases from bottom to top; and/or the second pipe section 9 sequentially comprises a second curved pipe section 91 and a second vertical section 92 from bottom to top, and the top end of the second vertical section 92 is an air outlet or is close to the air outlet. In this embodiment, the provision of the closing-in connection section 81 can raise the wind speed, and the provision of the first and second

bent pipe sections

83 and 91 lengthens the path of the air flow, thereby enabling the air to be sufficiently purified, ensuring the air purifying effect.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. An air purifier, comprising:

the shell (1) is provided with an air inlet (2) and an air outlet;

a filtering device (3) arranged in the shell (1) and comprising an annular membrane assembly (31) and at least one inner membrane assembly (32) arranged on the inner side of the annular membrane assembly (31), wherein the annular membrane assembly (31) and the inner membrane assembly (32) are both suitable for air to pass through the side wall of the annular membrane assembly and filter, a filtering channel with a top opening (35) is formed in the inner part of the inner membrane assembly (32), and an ash falling channel with a bottom opening (34) is formed on the periphery of the filtering channel;

the sound wave ash cleaner (4) is arranged in the shell (1) and is used for cleaning pollutants on the annular membrane component (31) and the inner membrane component (32) so that the pollutants fall through the ash falling channel.

2. An air cleaner according to claim 1, wherein the inner membrane modules (32) are arranged in a plurality of rows, each row having a plurality of the inner membrane modules (32), one of the inner membrane modules (32) of any one row being arranged in a triangle with any two inner membrane modules (32) of an adjacent row.

3. The air cleaner of claim 1, wherein the annular membrane assembly (31) includes a first membrane layer (311) and a first support layer (312), and the inner membrane assembly (32) includes a second membrane layer (321) and a second support layer (322).

4. An air cleaner according to claim 3, wherein the first membrane layer (311) and the second membrane layer (321) are each Al ₂ O ₃ Made, the first support layer (312) and the second support layer (322) are each made of SiC.

5. An air cleaner according to any one of claims 1-4, further comprising a hollow support column (5), said support column (5) being arranged in said housing (1) and supported below said filter device (3), said air inlet (2) being directly opposite to the outer surface of said support column (5), said support column (5) and said filter device (3) being in a gap with the side wall of said housing (1), the top periphery of said filter device (3) being in sealing connection with the side wall of said housing (1).

6. An air cleaner according to claim 5, wherein the outer and inner surfaces of the support column (5) are smoothly curved.

7. An air cleaner according to claim 5, wherein the support column (5) comprises at least a main support section connected to the filter device (3), the outer diameter of which main support section decreases gradually from top to bottom, the bottom of the housing (1) being provided with an ash receiving tray (6) at the periphery of the main support section.

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

9. The air purifier according to claim 8, wherein an air duct connecting the top of the filter device (3) with the air outlet is further arranged in the housing (1), the air duct comprises a first pipe section (8) close to the filter device (3), a first ultraviolet lamp (11) is arranged in the first pipe section (8), and the first ultraviolet lamp (11) can emit ultraviolet light with the wavelength of 253.7nm for sterilization.

10. The air cleaner of claim 9, wherein the air duct further comprises an intermediate tube section (10) arranged downstream of the first tube section (8), the intermediate tube section (10) being provided with a second ultraviolet lamp (12) and a titanium dioxide catalytic layer (14), the second ultraviolet lamp (12) being capable of emitting ultraviolet light having a wavelength of 185nm and generating ozone for decomposing organic gases in cooperation with the titanium dioxide catalytic layer (14).

11. An air cleaner according to claim 10, wherein the air duct further comprises a second tube section (9) arranged downstream of the intermediate tube section (10), the second tube section (9) being provided with a third ultraviolet lamp (13), the third ultraviolet lamp (13) being capable of emitting ultraviolet light with a wavelength of 253.7nm for absorbing ozone escaping from the intermediate tube section (10).

12. The air purifier according to claim 10, wherein a first formaldehyde detection device (15) is arranged in the first pipe section (8), the controller is in communication connection with the first formaldehyde detection device (15) and the second ultraviolet lamp (12), and the controller can control the second ultraviolet lamp (12) to work when the formaldehyde concentration detected by the first formaldehyde detection device (15) is greater than a second preset value.

13. An air cleaner according to claim 11, wherein a first ozone detecting device (16) is arranged downstream of the intermediate pipe section (10), the controller is in communication connection with the first ozone detecting device (16) and the third ultraviolet lamp (13), and the controller is capable of controlling the power increase of the third ultraviolet lamp (13) when the concentration of ozone detected by the first ozone detecting device (16) is higher than a third preset value.

14. An air cleaner according to claim 11, wherein a second formaldehyde detection device (17) and a second ozone detection device (18) are arranged downstream of the second pipe section (9), the controller is in communication connection 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).

15. The air purifier according to claim 11, wherein the middle pipe section (10) is a horizontal pipe, the first pipe section (8) comprises a closing-in connecting section (81), a first vertical pipe section (82) and a first bent pipe section (83) from bottom to top in sequence, and the inner diameter of the closing-in connecting section (81) is gradually reduced from bottom to top; and/or the second pipe section (9) comprises a second bent pipe section (91) and a second vertical section (92) from bottom to top.