CN111981594A

CN111981594A - Air purifier

Info

Publication number: CN111981594A
Application number: CN202010846189.1A
Authority: CN
Inventors: 何伟坚; 何宏智
Original assignee: Guangzhou Jiusen Environmental Protection Industry Co ltd
Current assignee: Guangzhou Jiusen Environmental Protection Industry Co ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-11-24

Abstract

The invention provides an air purifier, which comprises a shell, an air inducing device, a filtering device and a control device, wherein the shell is provided with an air suction inlet and an air outlet, the air inducing device sucks air into the shell from the air suction inlet and blows the air out of the air outlet, the filtering device filters and purifies the air sucked into the shell from the air suction inlet, the filtering device comprises an inner filtering assembly and an outer filtering assembly, the inner filtering assembly is arranged on the shell and completely covers the air suction inlet, the outer filtering assembly is arranged on the shell and positioned at the outer side of the inner filtering assembly, the outer filtering assembly comprises a movable filter screen capable of collecting and winding, the control device simultaneously controls the air inducing device and the filtering device, and when the dust deposition amount of the filtering device is changed, the air volume of the air outlet kept stable by the air inducing device. The invention has the advantages of large air output and stable air output.

Description

Air purifier

Technical Field

The invention relates to an air purifier, in particular to an air purifier with large air output and stable air output; in particular, the utility model is particularly suitable for being used in a wide space environment.

Background

An air purifier is also called an air cleaner, an air freshener or a purifier, and the air purifier refers to a product capable of adsorbing, decomposing or converting various air pollutants (for example, aerosol particles such as decoration pollution, bacteria, allergens and the like, which generally include PM2.5, dust, pollen, peculiar smell, formaldehyde and the like), effectively improving air cleanliness, and is mainly classified into a household air purifier, a commercial air purifier, an industrial air purifier, a building air purifier and the like.

Air purifier mainly utilizes filter core device to adsorb or clear away the pollutant, and the filter core includes the filter screen usually, and the efficiency of filter core adsorption of pollutant mainly depends on clarifier fan power size and the rank of filter core filter screen (density size and filter screen material, wherein the filter screen material has the branch of material kind such as glass fibre, PET, PP complex). After the filter element is used for a period of time, a large amount of dust or pollutants are adsorbed on the filter screen, so that the filter screen is blocked, the adsorption capacity of the filter screen is influenced, the filter element needs to be cleaned and updated in time at the moment, and particularly in occasions needing a large amount of clean air, such as factories, buildings and the like, and if the filter screen is not cleaned and replaced in time, the filter screen can cause bad influence on a human body.

Chinese patent document CN201710287640.9 discloses an air purifier convenient for replacing filter screen, including the purifying box, purifying box side wall bottom is equipped with the air inlet duct, the purifying box top is equipped with the air outlet, be equipped with the exhaust fan in the purifying box, the purifying box inner wall is equipped with the spout, the exhaust fan below still is equipped with the one-level filter screen, the spout is located to one-level filter screen both sides in, one-level filter screen one end is equipped with first side shield, first side shield is mutually perpendicular with the one-level filter screen, the purifying box side wall is equipped with the first side opening that suits with first side shield, one side that first side shield was kept away from to the one-level filter screen is equipped with pop-up mechanism, pop-.

Chinese patent document CN201720989199.4 discloses an air purifier with a filter screen convenient to replace. The air purifier comprises a purifier body, an air inlet, an air outlet and an air filtering device; the gas filtering device comprises a first rotating shaft, a second rotating shaft and a filter screen; the first rotating shaft and the second rotating shaft are arranged in a staggered manner so that the filter screen is in a curve shape on the longitudinal section; the gas filtering device also comprises a filter screen inlet and a first buckle plate, wherein a first filter core is arranged at the filter screen inlet, and the initial end of the filter screen is wound on the first filter core; the gas filtering device also comprises a filter screen outlet and a second pinch plate, wherein a second filter element is arranged at the filter screen outlet, and the tail end of the filter screen is wound on the second filter element; the first filter element and the second filter element can rotate; the gas filtering devices are multiple, and a filtering plate is arranged between every two adjacent gas filtering devices.

Among the air purifier that can change the filter screen among the prior art, ubiquitous defect:

1. the clean air output of air is little, and applicable environment is single, can not satisfy the occasion that needs great amount of wind, especially the main occasion that the clarifier used: an industrial plant;

2. the filtering amount is increased by increasing the unit area of the filter screen, so that on one hand, the cost is increased, a plurality of devices can be placed in the same area to meet the purification standard, on the other hand, the problem of difficult maintenance is caused, and the filter screens of a plurality of products have different replacement time and period and need to be frequently operated;

3. the noise of the product is high, the power of the fan is increased to improve the air output, on one hand, the filtering effect cannot reach the standard, and on the other hand, the excessive noise generated in the working process of the purifier can be caused;

4. the air output of the purifier in the working process is unstable, and especially after the filter screen is used for a period of time, the air output is obviously reduced, so that the filtering and purifying effect is difficult to ensure.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the air purifier which has the advantages of large air output and stable air output.

In order to achieve the above object, the present invention provides an air cleaner comprising:

a casing having an air inlet and an air outlet;

an air inducing device that sucks air into the housing from the suction port and blows out the air from the blow-out port;

a filter device for filtering and purifying the air sucked into the housing from the suction port;

the filter device comprises an inner filter component and an outer filter component, wherein the inner filter component is arranged on the shell and completely covers the suction inlet, the outer filter component is arranged on the shell and positioned at the outer side of the inner filter component, and the outer filter component comprises a movable filter screen which is wound on the periphery of the shell and can be wound and replaced;

and the control device controls the air inducing device and the filtering device simultaneously, and correspondingly increases the air inducing power of the air inducing device or controls the movable filter screen in the outer filtering component to change the screen when the dust deposition amount of the filtering device is increased and changed.

In the technical scheme of the invention, on one hand, the control device can control the power of the air inducing device, and when the dust deposition amount of the filtering device is changed, the power of the air inducing device can be increased or decreased so as to dynamically regulate and control the air output until the air output is stabilized in a region close to stability; on the other hand, when the dust deposition amount of the filtering device is increased to the set maximum range value, the control device can control the movable filter screen in the adjusting and controlling filtering component to be wound and changed, and automatically change a new movable filter screen for use, so that the filtering effect is obviously improved, and the power of the air inducing device is dynamically adjusted and controlled to be in a proper size.

The dust accumulation amount of the filter device is the amount of dust particles adsorbed by the filter under the action of a certain air quantity.

According to another embodiment of the present invention, the filter further comprises a first detecting device for detecting the concentration of the particulate matters and/or the concentration of the volatile gas adsorbed on the particulate matters, and the dust collecting amount of the filter device is calculated according to the concentration value obtained by the first detecting device.

The pollutants in the invention mainly comprise PM2.5, VOC, dust, pollen, peculiar smell, formaldehyde, bacteria, allergen and the like, and one or more of the pollutants can be selected according to the use scene, for example, the concentration value of PM2.5 which is convenient to monitor is selected.

Specifically, the concentration value data acquired by the first detection device reflects the amount of dust particles accumulated (dust accumulation amount) of the filter device in the use process, and also reflects the current filtering efficiency condition of the filter device in real time, so that the induced air power of the induced air device is adjusted by feedback according to the data change of the dust accumulation amount calculated by the concentration value, when the dust accumulation amount is increased, the power of the induced air device is correspondingly increased to keep the air output stable, and after the dust accumulation amount reaches a certain degree, a new movable filter screen is correspondingly replaced and the power of the induced air device is adjusted at the same time to keep the air output stable.

The first detection device may be provided at the air inlet, at the air outlet, or at both the air inlet and the air outlet.

According to another embodiment of the present invention, the dust collecting device further comprises a second detecting device for detecting the magnitude of the wind pressure value of the air flowing from the air inlet to the air outlet, and the dust collecting amount of the filtering device is calculated according to the magnitude of the wind pressure value obtained by the second detecting device.

The air pressure value obtained by the second detection device reflects the air flow rate and the air resistance in the shell and also reflects the efficiency of the current filtering device in real time, the increase of the air pressure value means the increase of the dust deposition amount, if no treatment is carried out, the air output amount is correspondingly reduced, therefore, the induced air power of the induced air device is fed back and adjusted through the data change of the dust deposition amount calculated by the air pressure value, when the dust deposition amount is increased, the power of the induced air device is correspondingly increased to keep the stability of the air output amount, and after the dust deposition amount reaches a certain degree, a new movable filter screen is correspondingly replaced and the power of the induced air device is correspondingly adjusted to keep the stability of the air output amount.

The increase of the air pressure value means the increase of the dust accumulation amount of the filter screen, and at the moment, under the condition that the power of the air inducing device is not changed, the air passing amount of the filter device in unit time is correspondingly reduced, so that the integral air output amount is correspondingly reduced. According to the scheme, the condition of the dust accumulation amount of the filter screen is detected by presetting the range of the air pressure value, the dust accumulation amount is full, the lower the processing effect of the air purifier is, and the stable air output is kept by increasing the power of the air inducing device or controlling the movable filter screen in the outer filter assembly to change the screen according to the change of the detected pressure value.

The air output stability of the invention is a dynamic stability, so that the air output stability is within the set air output range.

According to another embodiment of the present invention, the air inducing device is disposed in the middle of the housing, the air inlet cavity is disposed below the air inducing device at the lower portion of the housing, the air inlet is disposed at the periphery of the air inlet cavity, the air is sucked from the periphery of the air inlet cavity, and the air inducing device changes the flow direction of the air to flow upward.

Preferably, air is horizontally sucked from the periphery of the air inlet cavity to form a side air inlet effect.

According to another embodiment of the invention, a plurality of grooves are arranged on the periphery of the air inlet cavity on the shell, the inner filter assembly is provided with a plurality of filter screen plates, the filter screen plates are detachably arranged in the grooves, the outer filter assembly further comprises a winding structure capable of changing screens, and the movable filter screen is arranged on the outer side of the filter screen plates through the winding structure.

According to another embodiment of the invention, the winding structure comprises a driving reel, a driven reel and at least one tensioning shaft, the driving reel being arranged next to the driven reel, wherein one end of the movable screen is wound around the driving reel and the other end of the movable screen is passed around the tensioning shaft and wound around the driven reel.

Wherein initiative spool and driven spool next-door neighbour set up, can effectively improve the coverable space of activity filter screen, and then set up the casing into square, polygon or even circular according to the use scene to blow in the full space of being covered of mouth on the increase casing, and then realize the technological effect of increase intake.

Compared with an air inlet structure adopted by the prior patent application (application number 2018105282816), on one hand, the air inlet cavity is arranged at the lower part of the shell, and a side air inlet mode is adopted, so that the overall height of the shell can be reduced, an air inlet or air outlet structure is not arranged at the bottom of the shell, the reserved ventilation height at the bottom of the shell can be saved, the overall structure is more compact and attractive, on the other hand, the air inducing device is arranged above the filtering device and cannot interfere with the structures of the inner filtering component and the outer filtering component, namely, the inner filtering component and/or the outer filtering component can be enclosed in a completely or nearly completely surrounding mode, the effective area of the air inlet surface is larger, the structure can be further simplified, and occupied space can be reduced on the same scale; in addition, the side air inlet structure is more practical and can be placed at any position of a use space, such as the middle position or the corner position of a factory.

According to another specific embodiment of the present invention, the control device further includes an encoder for detecting a rotation angle of the driving reel and/or the driven reel and/or the tension shaft, the control device controls the driving reel to perform the driving winding, and simultaneously converts a detection signal value of the encoder into a winding length value and compares the winding length value with a preset winding length, and when the winding length value is equal to or greater than the preset winding length, the control device controls the driving reel to stop winding.

Wherein the preset winding length is set according to the design size of the equipment.

According to another embodiment of the present invention, an air outlet cavity is provided at an upper portion of the housing above the air inducing device, the air outlet is provided at a top portion of the air outlet cavity, a silencing structure is provided in the air outlet cavity, and air is passed through the silencing structure and is exhausted from the air outlet.

According to another embodiment of the present invention, the apparatus further comprises a refreshing device, a spray outlet is provided on the housing, and the control device utilizes the refreshing device to spray the spray from the spray outlet, wherein the spray liquid medicine in the refreshing device can be selected from a plurality of specific or combined liquid medicines such as a humidifying liquid medicine, an aromatherapy liquid medicine, a disinfection liquid medicine, etc. according to the use scene.

According to another embodiment of the present invention, the air purifier further comprises a sterilization device disposed in the housing for sterilizing the air filtered and purified by the filtering device.

The invention has the following beneficial effects:

when the dust accumulation amount of the filtering device is increased, the control device correspondingly increases the air inducing power of the air inducing device or controls the movable filter screen in the outer filtering component to change the screen, so that the stability of the air output amount is maintained.

The air purifier has the advantage of large air output, can meet the requirement of occasions requiring large air output, and is particularly suitable for industrial use; and the power of the induced draft device is adjusted according to the service condition of the filtering device, the screen changing operation of the movable filter screen is automatically carried out, and the stable and good air outlet effect is kept.

In addition, the air blowing-in port is arranged on the circumferential side surface of the air inlet cavity at the lower part of the shell, so that on one hand, the air inlet area is larger, on the other hand, no extra air inlet space is required to be reserved in the side surface area of the shell, and the external resistance of air inlet can be reduced; meanwhile, the whole space utilization rate can be improved, and the structural design of the whole machine is facilitated.

In addition, the automatic collection movable filter screen is arranged, the control device can automatically control the movable filter screen to change the filter screen according to the first detection device and the second detection device or according to related data of a set timing program, so that a new movable filter screen can be changed, and the automatic collection movable filter screen has the advantages of high automation degree, good filtering effect, simplicity in maintenance, great reduction in manual operation, convenience in use and the like.

In addition, the air outlet cavity is provided with the silencing structure, air flows through the silencing structure to be silenced and then is discharged from the air outlet, the integral working noise is greatly reduced, and the user experience is better.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a frame of an air purifier of the present invention;

FIG. 2 is a schematic view showing the overall structure of the air cleaner of the present invention;

FIG. 3 is a schematic layout of the air purifier of the present invention;

FIG. 4 is a schematic structural view of the inner and outer filter assemblies in the intake plenum;

FIG. 5 is a schematic structural view of the driving reel and the driven reel;

FIG. 6 is a schematic view of the construction of the driven reel;

FIG. 7 is a schematic view of a connection structure for ensuring synchronous rotation of the reels;

FIG. 8 is a schematic view showing the structure of the upper end connection of the driven reel;

FIG. 9 is an exploded schematic view of FIG. 7;

FIG. 10 is a schematic cross-sectional view of FIG. 7 in an exploded state;

FIG. 11 is a schematic view of a silencing structure in the air outlet cavity;

FIG. 12 is a schematic view of another sound attenuating structure in the outlet chamber;

fig. 13 is a schematic cross-sectional view of a weakening layer.

Detailed Description

An air purifier, as shown in fig. 1-13, comprises a housing 100, an air inducing device, a filtering device 300, a control device, and a detection device.

The casing 100 has an air inlet 110 and an air outlet 120, the air inducing device includes a fan 200, the fan 200 sucks air into the casing 100 from the air inlet 110 and blows out the air from the air outlet 120, and the filter device 300 performs a filtering and purifying process on the air sucked into the casing 100 by the air inlet 110.

The filter device 300 of the present invention includes an inner filter assembly 310 and an outer filter assembly 320, the inner filter assembly 310 is disposed on the casing 100 and completely covers the suction port 110, the outer filter assembly 320 is disposed on the casing 100 and is located outside the inner filter assembly 310, and the outer filter assembly 320 includes a movable filter screen 321 capable of collecting and winding.

The control device adopts a PLC or a singlechip controller, for example, and controls the air inducing device and the filtering device 300 at the same time, when the dust deposition of the filtering device 300 is changed, the fan 200 is used for keeping the air volume of the air outlet 120 stable, the power of the air inducing device can be increased or reduced to dynamically regulate and control the air output to a stable state, and when the dust deposition of the filtering device 300 is changed to a set maximum range value, the control device can control and adjust the movable filter screen 321 in the filtering component to collect and wind, and automatically replace a new movable filter screen 321 for use, so as to obviously improve the filtering effect.

The dust deposition amount herein refers to the filtration amount and deposition amount of the object to be filtered in the filter device 300, and the effect of the filtration treatment is reduced as the dust deposition amount is larger.

The detecting device includes a first detecting device, which is used to obtain a concentration value of the particulate matters at the suction inlet 110 and/or the blowing outlet 120 or a concentration value of the volatile gas adsorbed on the particulate matters in real time, for example, detect the concentration by means of a sensor, calculate the amount of the deposited dust according to the obtained concentration value, or directly preset a preset concentration value range corresponding to the amount of the deposited dust, compare the obtained concentration value with the preset concentration value range, take the blowing outlet 120 as an example:

when the concentration value of the air outlet 120 is higher than the preset concentration value range, the control device controls the induced air power of the induced air device to be increased to keep the air volume of the air outlet 120 stable, or when the concentration value of the air outlet 120 is higher than the preset maximum concentration value (at this time, the dust deposition amount exceeds the set maximum value), the control device controls the movable filter screen 321 in the outer filter assembly 320 to perform screen changing, and simultaneously, the control device cooperatively controls the induced air power of the induced air device to be decreased to keep the air volume of the air outlet 120 stable.

In other examples of the present invention, the detecting device further includes a second detecting device (for example, a pressure sensor), the second detecting device obtains a wind pressure value of the air flowing from the air inlet 110 to the air outlet 120 in real time, the control device calculates the obtained wind pressure value to obtain the dust deposition data, or directly presets a preset wind pressure value range corresponding to the dust deposition, and compares the obtained wind pressure value with the preset wind pressure value range, taking the position of the air outlet 120 as an example:

when the wind pressure value is lower than the preset wind pressure value range, the induced wind power of the fan 200 is increased to keep the air volume of the air outlet 120 stable, or when the wind pressure value of the air outlet 120 is lower than the preset minimum wind pressure value (at this time, the dust deposition amount exceeds the set maximum value), the movable filter screen 321 in the outer filter assembly 320 is controlled to change the screen to keep the air volume of the air outlet 120 stable.

A preferred housing 100 is a rectangular parallelepiped structure, as shown in fig. 1-3, a blower 200 of an air inducing device is disposed in the middle of the housing 100, an air intake cavity 100a is disposed below the blower 200 at the lower part of the housing 100, an air intake 110 is disposed at the periphery of the air intake cavity 100a, air is horizontally sucked from the periphery of the air intake cavity 100a, and the flow direction is changed to flow upward by the blower 200; an air outlet cavity 100b is provided above the fan 200 at the upper portion of the casing 100, the air outlet 120 is provided at the top of the air outlet cavity 100b, a silencing structure 150 is provided in the air outlet cavity 100b, and air is passed through the silencing structure and is silenced and then discharged from the air outlet 120.

The inner filter assembly 310 is preferably a frame-type detachable structure, the housing 100 is provided with a plurality of grooves 130 at the periphery of the intake chamber 100a, the inner filter assembly 310 has a plurality of filter screen plates 311 (containing receiving frames for folding the filter screens), and the filter screen plates 311 are detachably disposed in the grooves 130, so that the inner filter assembly can be used for a long time and can be detached and replaced after being used for a long time.

The outer filter assembly 320 further includes a winding structure capable of exchanging a screen, and the movable filter screen 321 is disposed outside the filter screen plate 311 by the winding structure.

The winding structure includes a driving reel 322, a driven reel 323, and four tensioning shafts 324, wherein the driving reel 322 and the driven reel 323 are disposed closely, one end of the movable filter 321 is wound around the driving reel 322, and the other end of the movable filter 321 is wound around the four tensioning shafts 324 and wound around the driven reel 323.

Wherein, the movable filter 321 to be used in advance on the driven reel 323 is driven by the motor 325, for example, to realize the precise winding process of the movable filter 321, and the used movable filter 321 is collected by the driving reel 322 while the new movable filter 321 on the driven reel 323 is replaced.

Specifically, three consecutive circumferential side surfaces of the lower portion of the housing 100 form air intake surfaces, i.e., an upper side surface, a lower side surface, and a right side surface in fig. 4, the remaining one side surface forms a mounting surface, i.e., a left side surface in fig. 4, and the driving reel 322 and the driven reel 323 are disposed on the mounting surface, where fig. 4 is a cross-sectional view in a top view.

Further, four tensioning shafts 324 are respectively disposed at corners of the upper, right, lower and left sides to form a support for the movable screen 321.

The detection device may further include an encoder for detecting a rotation angle of the driving reel 322 and/or the driven reel 323 and/or the tension shaft 324, the control device controls the driving reel 322 to perform driving winding, converts a detection signal value of the encoder into a winding length value and compares the winding length value with a preset winding length, and when the winding length value is equal to or greater than the preset winding length, the control device controls the driving reel 322 to stop winding.

For example, the encoder is disposed on one of the tension shafts 324 and the surface of the body of the tension shaft 324 is provided with an anti-slip layer (e.g., rubber) to avoid slippage of the movable screen 321 relative to the tension shaft 324 during winding.

Still further, in order to ensure the structural regularity of the housing 100, the mounting surface is recessed inward to form the mounting groove 140, and the driving scroll 322 and the driven scroll 323 are disposed in the mounting groove 140, so that the housing 100 still maintains a square structure after the sealing plate is disposed thereon.

In this embodiment, in order to ensure the synchronous rotation between the driving reel 322 and the driven reel 323, the connecting structure 330 is disposed on both the driving reel 322 and the driven reel 323, which is convenient for installation and keeps the stability of rotation.

As shown in fig. 5 to 10, the driving reel 322 and the driven reel 323 are vertically disposed on the mounting groove 140, a bearing seat 141 is disposed on the mounting groove 140, the lower ends of the driving reel 322 and the driven reel 323 are rotatably disposed on the bearing seat 141, and the driving reel 322 is driven by the motor 325 through the chain transmission mechanism 326.

Taking the connection structure 330 connected to the driven reel 323 as an example for detailed description, the connection structure 330 includes a connection flange 331, a sleeve 332, a driving shaft 333, and a force adjusting mechanism.

A connecting groove 3311 is provided in the connecting flange 331, the sleeve 332 is provided in the connecting groove 3311 via two bearings 334, wherein a washer 335 (snap ring) is provided between the two bearings 334, and the two bearings 334 and the washer 335 are installed in a limited manner by the snap spring 336.

The driving shaft 333 is slidably provided in the axial direction in the sleeve 332, wherein a first limit post/pin 3321 is provided in the sleeve 332, a sliding groove 3331 is provided in the surface of the driving shaft 333 in the axial direction, and the first limit post/pin 3321 is provided in the sliding groove 3331 so that the sleeve 332 can be rotated synchronously with the driving shaft 333 by the engagement of the first limit post/pin 3321 with the sliding groove 3331, in order to keep the driving shaft 333 and the sleeve 332 rotatable synchronously with each other and further rotatable synchronously with the driven reel 323.

The lower end of the driving shaft 333 is detachably coupled to the driven reel 323, and a preferred structure is: the driving shaft 333 is in bolt fit with the driven reel 323, the upper end of the driven reel 323 is provided with a groove 3231 recessed along the axial direction of the driven reel 323 and a through groove 3232 along the radial direction of the driven reel, the through groove 3232 is communicated with the through groove, the lower end of the driving shaft 333 extends into the groove 3231, the lower end of the driving shaft 333 is provided with a second limiting column/pin 3332, and the second limiting column/pin 3332 is in fit connection with the through groove 3232.

The through groove 3232 is preferably an open groove, and the operation is very convenient only by pulling the driving shaft 333 upward when detaching.

In order to facilitate the adjustment of the driving shaft 333 during the installation process, a rotation knob 3333 is provided at the upper end of the driving shaft 333, and the driving shaft 333 can be actively rotated by rotating the rotation knob 3333 to synchronously rotate the driven reel 323.

The force adjusting mechanism comprises a friction block 337, an elastic piece 338 and an adjusting bolt 339, wherein a transverse groove 3312 is formed in the connecting flange 331, the friction block 337, the elastic piece 338 and the adjusting bolt 339 are sequentially arranged in the transverse groove 3312, the friction block 337 abuts against the shaft sleeve 332, and the acting force of the friction block 337 on the shaft sleeve 332 is changed by tightening or loosening the adjusting bolt 339 to press the elastic piece 338.

The elastic member 338 is, for example, a spring, the friction block 337 is preferably a copper block, and tightening the adjusting bolt 339 can compress the elastic member 338, thereby increasing the acting force between the friction block 337 and the sleeve 332, providing a larger friction torque, and finally increasing the acting force borne by the rotation process of the reel, so as to avoid the relative slipping phenomenon.

Referring to fig. 3 again, the fine filter assembly 340 may be further disposed to perform a fine filtering process on the air sucked into the air inlet cavity 100a, the fine filter assembly 340 is disposed in the casing 100 and located at an inlet of the fan 200, as shown in the figure, the air sucked into the air inlet cavity 100a is filtered and purified by the fine filter assembly 340, and then is blown into the air outlet cavity 100b by the fan 200, and finally blown out from the air outlet 120.

Wherein, can increase or reduce the detachable filter screen number of piles according to the use scene of difference to can also select the special effect filter screen of the specific pollution source of adaptation, for example when VOC is more, add activated carbon formula filter screen.

A sterilization device may be further provided, and the sterilization device is disposed in the air intake cavity 100a and is used for performing sterilization treatment on the air filtered and purified by the filter device 300, for example, an ultraviolet lamp 160 is installed in the air intake cavity 100a for performing sterilization treatment, etc.

As shown in fig. 11, the sound deadening structure 150 is disposed in the casing 100 above the blower 200, and as shown by arrows in the drawing, the sound deadening structure 150 is provided with a flow blocking section 151 for receiving the intake air and changing a part of the front intake air into a flow direction, and a flow guiding section 152 for continuously guiding the air to flow toward the air outlet 120.

The inner wall (including the side wall) of the sound-deadening structure 150 is provided with a deadening layer 153 for attenuating the vibration generated by the air impact, and as shown in the drawing, the deadening layer 153 includes soundproof cotton 1531, and a perforated plate 1532 fixing the soundproof cotton.

Of these, the choke section 151 is preferably of an arc-shaped configuration, the choke section 151 causes the flow direction of the front-side sucked air (main portion) to change from upward to rightward, the flow-inducing section 152 is preferably of an arc-shaped configuration, and the flow-inducing section 152 causes the flow direction of the air to change from rightward to upward.

Specifically, the arc radius of the flow blocking section 151 is not smaller than the arc radius of the guide section, for example, as shown in fig. 11, when the width L of the housing 100 is about 600 mm, the arc radius R1 of the flow blocking section 151 is about 220 mm, and the arc radius R2 of the guide section is about 180 mm.

The outlet of the fan 200 in fig. 11 is offset, so that the height of the outlet air cavity 100b can be effectively reduced, and the inlet of the sound attenuating structure 150 and the outlet of the sound attenuating structure 150 are partially overlapped or not overlapped on the projection of the horizontal plane, wherein the overlapped area is not more than one fourth of the inlet of the sound attenuating structure 150.

Further, as shown in fig. 12, a contraction section 154 for converging air at the outlet of the fan 200 is further included, the contraction section 154 is located at one side below the flow guiding section 152, and the fan 200 may be disposed close to the center to facilitate structural installation of the fan 200.

The present invention may further include a refreshing device, wherein the housing 100 is provided with a spray outlet, for example, the spray outlet is located at the top of the housing 100, the control device utilizes the refreshing device to spray the spray from the spray outlet, and the spray liquid in the refreshing device may be selected from a plurality of specific or combined liquid medicines such as a humidification liquid medicine, an aromatherapy liquid medicine, a disinfection liquid medicine, etc. according to a use scene.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that variations may be made without departing from the scope of the invention, and equivalents may be resorted to without departing from the scope of the invention.

Claims

1. An air purifier, comprising:

a casing having an air suction port and an air discharge port;

an air guide device that sucks air into the housing from the suction port and blows out the air from the air outlet;

a filter device for filtering and purifying air sucked into the housing from the suction port;

the filter device comprises a shell, a suction inlet, an inner filter assembly, an outer filter assembly and a filter, wherein the inner filter assembly is arranged on the shell and completely covers the suction inlet, the outer filter assembly is arranged on the shell and positioned at the outer side of the inner filter assembly, and the outer filter assembly comprises a movable filter screen which is wound on the periphery of the shell and can be wound and replaced;

and

the control device controls the air inducing device and the filtering device simultaneously, and when the dust deposition amount of the filtering device is increased, the control device correspondingly increases the air inducing power of the air inducing device or controls a movable filter screen in the outer filtering component to change the screen.

2. The air purifier of claim 1, further comprising a first detecting device for detecting a concentration of the particulate matter and/or a concentration of the volatile gas adsorbed on the particulate matter, wherein the dust deposition amount of the filtering device is calculated based on the concentration value obtained by the first detecting device.

3. The air cleaner of claim 1, further comprising second detecting means for detecting a magnitude of a wind pressure of air flowing from the suction port to the blow-out port, wherein the dust collecting amount of the filtering means is calculated based on the magnitude of the wind pressure obtained by the second detecting means.

4. The air cleaner as claimed in claim 1, wherein the air inducing means is provided at a middle portion of the housing, an air intake chamber is provided at a lower portion of the housing below the air inducing means, the suction ports are provided at an outer circumference of the air intake chamber, air is sucked from the outer circumference of the air intake chamber, and a flow direction of the air is changed to an upward flow by the air inducing means.

5. The air cleaner of claim 4, wherein a plurality of grooves are formed in the housing at the outer circumference of the intake chamber, the inner filter assembly has a plurality of filter screens detachably disposed in the grooves, the outer filter assembly further includes a winding structure capable of changing screens, and the movable filter screen is wound around the outer side of the filter screens by the winding structure.

6. The air cleaner of claim 5, wherein the winding structure includes a drive spool, a driven spool, and at least one tension shaft, the drive spool being disposed proximate to the driven spool, wherein one end of the movable screen winds around the drive spool and the other end of the movable screen winds around the tension shaft and onto the driven spool.

7. The air cleaner of claim 6, further comprising an encoder for detecting a rotation angle of the active reel and/or the driven reel and/or the tension shaft, wherein the control device controls the active reel to perform active winding, converts a detection signal value of the encoder into a winding length value and compares the winding length value with a preset winding length, and when the winding length value is equal to or greater than the preset winding length, the control device controls the active reel to stop winding.

8. The air purifier of claim 4, wherein an outlet cavity is disposed at an upper portion of the housing above the air inducing device, the outlet is disposed at a top of the outlet cavity, a silencing structure is disposed in the outlet cavity, and air passing through the silencing structure is silenced and then discharged from the outlet.

9. The air purifier of claim 1 further comprising a freshener, a spray outlet provided in the housing, and the control device uses the freshener to emit a spray from the spray outlet.

10. The air purifier as claimed in claim 1, further comprising a sterilizing unit disposed in the housing for sterilizing the air filtered and purified by the filtering unit.