CN111437669A

CN111437669A - Air purifier

Info

Publication number: CN111437669A
Application number: CN201910045474.0A
Authority: CN
Inventors: 尹晓英; 王永涛; 戴现伟; 魏学帅; 吕静静
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2020-07-24

Abstract

The present invention provides an air purifier, comprising: the shell is provided with an air inlet and an air outlet; the annular filter element is arranged in the shell, and external air enters the shell from the air inlet and then reaches the annular filter element for filtering; laminar flow fan, set up in the casing, it is formed with inlet air channel, laminar flow fan passes through fluid viscosity effect disturbance warp get into after the annular filter filters inlet air channel's air forms laminar flow wind, laminar flow wind certainly the air outlet is discharged the casing. The air purifier has the advantages of low noise, high air volume and high air pressure in the air supply process.

Description

Air purifier

Technical Field

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

Background

With the rapid development of economy, a large amount of energy is consumed to generate a large amount of harmful substances, and the earth where people live is full of particles, sulfur oxides, nitrogen oxides and hydrocarbons, so that the health of people is seriously threatened. In order to make the air fresh, an air purifier is required to purify the air. At present, the air purifier mainly adopts a centrifugal fan or an axial flow fan to supply air in a single direction, and blades periodically impact passing air flow to generate obvious rotation noise, so that the air supply noise is high, and the noise value is close to the limit under the limitation of performance indexes. In addition, the centrifugal fan needs volute matching to achieve the air supply effect, and the volute tongue can impact air flow to generate strong turbulence noise. In addition, most users consider that the clean air generated by the existing air purifier cannot be uniformly distributed in a room or a closed space, and have certain distribution limitation.

Disclosure of Invention

One object of the present invention is to provide an air purifier with low noise, high air volume and high air pressure.

The invention further aims to avoid the air outlet of the air purifier from blowing directly to users and improve the use experience of the users.

Another further object of the present invention is to provide the air purifier with 360 ° air supply.

Still another object of the present invention is to expand the vertical blowing range of the air purifier to achieve global purification.

The invention provides the following technical scheme:

an air purifier, comprising:

the shell is provided with an air inlet and an air outlet;

the annular filter element is arranged in the shell, and external air enters the shell from the air inlet and then reaches the annular filter element for filtering; and

the laminar flow fan is arranged in the shell, an air inlet channel is formed in the center of the laminar flow fan, the laminar flow fan disturbs air entering the air inlet channel after being filtered by the annular filter element through a fluid viscosity effect to form laminar flow air, and the laminar flow air is discharged out of the shell from the air outlet.

Optionally, the laminar flow fan comprises:

the laminar flow fan comprises a plurality of annular discs which are arranged in parallel at intervals, have the same central axis and have the centers forming an air inlet channel together, and air filtered by the annular filter element enters the air inlet channel to reach gaps among the annular discs; and

and the motor is connected with the laminar flow fan and is configured to drive the plurality of annular discs to rotate, so that the air boundary layer close to the surfaces of the plurality of annular discs is driven by the plurality of rotating annular discs to rotate and move from inside to outside to form laminar flow wind.

Optionally, a laminar flow fan and a motor are arranged at the upper part in the shell, and an air outlet is arranged at the upper part of the shell corresponding to the laminar flow fan; the annular filter element is vertically arranged below the laminar flow fan.

Optionally, the housing is provided with an air outlet at an upper portion thereof around the laminar flow fan.

Optionally, the upper part and the lower part in the shell are respectively provided with a laminar flow fan and a motor, and the upper part and the lower part of the shell are respectively provided with an air outlet at positions corresponding to the two laminar flow fans; the annular filter core sets up vertically between two laminar flow fans, and the casing sets up the air intake around annular filter core a week at its middle part.

Optionally, the laminar flow fan further comprises: the wind shielding piece is arranged outside the laminar flow fan, is positioned between the shell and the laminar flow fan and is provided with a gap; the shell is provided with an air outlet at the position corresponding to the notch, and laminar air flows out of the shell through the notch and the air outlet in sequence.

Optionally, the laminar flow fan further comprises: a driving disk arranged in parallel with the plurality of annular disks at intervals; and a connecting member penetrating the drive disk and the plurality of annular disks to connect the plurality of annular disks to the drive disk; the motor is configured to directly drive the drive disk to rotate, and the drive disk drives the plurality of annular disks to rotate.

Optionally, the drive disk is formed with a recess at its center toward the plurality of annular disks; the motor is fixedly arranged in the concave part; this air purifier still includes: the fixing mechanism is arranged in the shell and comprises a fixing plate and a fixing frame, and the motor is arranged between the fixing plate and the fixing frame; the fixing frame is provided with a body part and a claw part extending from the body part to the fixing plate; the body part is provided with a through hole, and an output shaft of the motor extends out of the fixing frame from the through hole and then is connected with the laminar flow fan; the clamping claw part is used for being fixed with the fixing plate and is matched with the concave part.

Optionally, the upper surface of the driving disc is a plane, and the lower surface of the driving disc is provided with a projection of an inverted cone; the motor is fixedly arranged on the plane of the driving disc.

Optionally, the connecting piece is a blade, the cross section of the blade is provided with two sections of curves which are sequentially arranged along the rotating direction of the annular disc, and the chord length of the two sections of curves is in a linear relation with the air quantity of the laminar flow fan. Furthermore, the cross section of the blade is provided with a double-arc which is convex towards the rotating direction of the annular disk and comprises an inner arc and a back arc which are sequentially arranged along the rotating direction of the annular disk; the inner arc and the back arc have different circle centers, and two ends of the inner arc and the back arc are intersected, or the inner arc and the back arc have the same circle center and are arranged in parallel.

Optionally, the annular disc is arranged according to one or more of the following structures:

the distance between two adjacent annular disks is gradually increased along the flowing direction of the airflow in the air inlet channel;

the inner diameters of the plurality of annular disks are gradually reduced along the flowing direction of the airflow in the air inlet channel;

each annular disk is an arc-shaped disk which is gradually close to the driving disk from the inner side to the outer side.

According to the air purifier, the annular filter element and the laminar flow fan are arranged in the shell, the laminar flow fan is used for disturbing the air filtered by the annular filter element through the fluid viscosity effect to realize laminar flow air supply, the air supply process is low in noise, high in air quantity and high in air pressure, and the use experience of users of the air purifier is effectively improved.

Furthermore, the laminar flow fan and the air outlet are arranged on the upper portion of the air purifier, the annular filter element is arranged below the laminar flow fan, air is supplied from the upper portion, air is prevented from being directly blown to a user, the use experience of the user is improved, and 360-degree uniform air supply can be realized under the optimal condition.

Furthermore, the air purifier can be respectively provided with laminar flow fans at the upper part and the lower part of the air purifier, and the annular filter element is arranged between the two sets of laminar flow fans, so that the air supply range of the air purifier in the vertical direction is expanded, and the global purification is realized.

Furthermore, the air purifier is based on the annular filter element, and the air inlets can be formed in the periphery of the shell, so that 360-degree air inlet is realized.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic perspective view of an air purifier according to one embodiment of the present invention.

Fig. 2 is a schematic exploded view of the air purifier shown in fig. 1.

Fig. 3 is a schematic exploded view of an air purifier according to another embodiment of the present invention.

Fig. 4 is a schematic exploded view of an air purifier according to still another embodiment of the present invention.

Fig. 5 is a schematic perspective view of a laminar flow fan of an air cleaner according to one embodiment of the present invention.

Fig. 6 is a schematic diagram of the blowing principle of the laminar flow fan of the air cleaner shown in fig. 1.

Fig. 7 is a velocity profile and force profile of a laminar flow fan of the air purifier shown in fig. 1.

Fig. 8 is a schematic cross-sectional view of the laminar flow fan shown in fig. 5.

Fig. 9 is a schematic perspective view of another view of the laminar flow fan shown in fig. 5.

Fig. 10 is a schematic perspective view of still another perspective view of the laminar flow fan shown in fig. 5.

Fig. 11 is a schematic cross-sectional view of a securing mechanism, a motor, and a laminar flow fan of an air cleaner in cooperation, according to one embodiment of the present invention.

Fig. 12 is a schematic exploded view of a motor and a fixing mechanism of an air cleaner according to an embodiment of the present invention.

Fig. 13 is a schematic front view of a laminar flow fan of an air purifier according to one embodiment of the present invention.

Fig. 14 is a schematic perspective view of another perspective of the laminar flow fan shown in fig. 13.

Fig. 15 is a schematic view of the air circulation of the laminar flow fan shown in fig. 13.

Fig. 16 is a schematic cross-sectional view of the laminar flow fan shown in fig. 13.

Fig. 17 is a schematic diagram of the relationship between the chord length of the blade of the laminar flow fan shown in fig. 13 and the air volume and the air pressure.

Fig. 18 is a schematic cross-sectional view of a laminar flow fan of an air cleaner having a double-circular-arc blade according to an embodiment of the present invention.

Fig. 19 is a schematic view of the relationship between the installation angle of the double circular arc blade and the air volume and the air pressure.

Fig. 20 is a cross-sectional schematic view of a laminar flow fan of an air purifier having an aero blade according to one embodiment of the present invention.

FIG. 21 is a schematic view of the relationship between the installation angle of the aviation blade and the air volume and the air pressure.

Fig. 22 is a schematic front view of a laminar flow fan in which the annular disk pitch of a laminar flow fan of an air cleaner is gradually changed according to one embodiment of the present invention.

Fig. 23 is a schematic perspective view of the laminar flow fan shown in fig. 22.

Fig. 24 is a schematic diagram of the relationship between the gradual pitch change of the multiple annular disks and the air volume and the air pressure of the laminar flow fan shown in fig. 22.

Fig. 25 is a schematic cross-sectional view of a laminar flow fan with a graded inner diameter of an annular disk of a laminar flow fan of an air cleaner according to one embodiment of the present invention.

Fig. 26 is a schematic diagram of the relationship between the inner diameter gradient of a plurality of annular disks and the air volume and the air pressure of the laminar flow fan shown in fig. 25.

Fig. 27 is a schematic central angle view of an inner and outer diameter connecting line of a plurality of annular disks of a laminar flow fan of which the annular disks of the laminar flow fan of the air cleaner are arc-shaped disks on the same longitudinal section passing through a central axis according to an embodiment of the present invention.

Fig. 28 is a schematic diagram showing the relationship between the central angle of the laminar flow fan shown in fig. 27 and the air volume and the air pressure.

Detailed Description

Fig. 1 is a schematic perspective view of an air purifier 100 according to one embodiment of the present invention. Fig. 2 is a schematic exploded view of the air purifier 100 shown in fig. 1. The air purifier 100 of embodiments of the present invention may generally include a housing 200, an annular filter element 600, and a laminar flow fan 110. The housing 200 is provided with an air inlet 201 and an air outlet 202. The annular filter element 600 is disposed in the casing 200, and the outside air enters the casing 200 from the air inlet 201 and then reaches the annular filter element 600 for filtering. The laminar flow fan 110 is disposed in the housing 200, an air inlet channel 302 is formed in the center of the laminar flow fan 110, the laminar flow fan 110 disturbs air filtered by the annular filter element 600 and then enters the air inlet channel 302 to form laminar flow air, and the laminar flow air is discharged out of the housing 200 from the air outlet 202.

The air purifier 100 of the embodiment of the invention is provided with the annular filter element 600 and the laminar flow fan 110 in the shell 200, and the laminar flow fan 110 is used for disturbing the air filtered by the annular filter element 600 through the fluid viscosity effect to realize laminar flow air supply, so that the air purifier 100 has the advantages of low noise, high air volume and high air pressure in the air supply process, effectively improves the use experience of users of the air purifier 100, and has novel appearance, good function and excellent quality.

In some embodiments, the laminar flow fan 110 includes a laminar flow fan 300 and a motor 400. Fig. 5 is a schematic perspective view of the laminar flow fan 300. The laminar flow fan 300 includes a plurality of annular disks 301, the plurality of annular disks 301 are arranged in parallel at intervals, have the same central axis, and have centers that collectively form an air inlet channel 302, and air filtered by the annular filter element 600 enters the air inlet channel 302 to reach gaps between the plurality of annular disks 301. The motor 400 is connected to the laminar flow fan 300 and configured to drive the plurality of annular disks 301 to rotate, so that the air boundary layer 304 near the surfaces of the plurality of annular disks 301 is driven by the plurality of annular disks 301 to rotate from inside to outside to form laminar flow wind. Where air boundary layer 304 is a very thin layer of air adjacent to the surface of each disk.

Fig. 6 is a schematic diagram of the air supply principle of the laminar flow fan 110. The motor 400 drives the plurality of annular disks 301 to rotate at a high speed, and air in the intervals of the annular disks 301 contacts and moves mutually, so that the air boundary layer 304 close to the surfaces of the annular disks 301 is driven by the rotating annular disks 301 to rotate from inside to outside to form laminar air under the action of viscous shear force tau. Fig. 7 is a velocity profile and force profile of laminar flow fan 110 of air purifier 100 according to an embodiment of the present invention, which is a schematic illustration of a viscous shear force profile τ (y) and a velocity profile u (y) experienced by air boundary layer 304. The viscous shear experienced by air boundary layer 304 is actually the resistance that the individual disks create to air boundary layer 304. The axis of abscissa in fig. 7 refers to the distance in the moving direction of air boundary layer 304, and the axis of ordinate refers to the height of air boundary layer 304 in the direction perpendicular to the moving direction. v. of_eThe velocity of the air flow at each point within air boundary layer 304, the thickness of air boundary layer 304, τ_wThe variables y in τ (y) and u (y) refer to the height of the cross-section of air boundary layer 304 in the direction perpendicular to the direction of travel, L the distance between a point on the inner circumference of annular disc 301 and a point on the surface of annular disc 301, then τ (y) is the distribution of viscous shear forces experienced at the height of the cross-section of air boundary layer 304 at distance L of y, and u (y) is the velocity distribution at the height of the cross-section of air boundary layer 304 at distance L of y.

The overall shape of the housing 200 of the air purifier 100 according to the embodiment of the present invention may be designed according to actual needs, such as a cylinder, a rectangular parallelepiped, a cube, and other shapes. In some embodiments, the housing 200 is a rectangular parallelepiped structure having four sides and upper and lower bottom surfaces. One side or a plurality of sides of the four sides are selected to be provided with an air inlet 201 to form an air inlet side. In one embodiment, air inlets 201 are disposed on four sides of the housing 200 to provide 360 ° air inlet.

The cross section of the annular filter element 600 is annular, and the center is a hollow channel. In order to move the air filtered by the ring filter 600 into the air inlet passage 302 as much as possible, in some embodiments, the air cleaner 100 of the embodiment of the present invention further includes: and a partition plate 101 disposed between the laminar flow fan 300 and the annular filter element 600, for defining a direction of air filtered by the annular filter element 600 to reach the hollow passage thereof, and preventing the air from flowing out of a gap between the annular filter element 600 and the laminar flow fan 300. The specific shape of the baffle 101 may be designed against the configuration of the laminar flow fan 300, the annular filter cartridge 600, and the housing 200. For example, in one embodiment, the casing 200 has a rectangular parallelepiped shape, and the partition 101 has a square cross section, and has a circular hollow structure in a central portion thereof, and the circular hollow structure has a hollow passage on one side and an air inlet passage 302 on the other side.

As shown in fig. 2, in some embodiments, the air purifier 100 according to the embodiment of the present invention is provided with a laminar flow fan 300 and a motor 400 at an upper portion inside a housing 200, and the housing 200 is provided with an air outlet 202 at a position corresponding to the laminar flow fan 300 at the upper portion; the annular filter element 600 is vertically disposed in the housing 200 below the laminar flow fan 300 to extend in the up-down direction. The air purifier 100 of the embodiment of the invention blows air from the upper part, so that direct blowing to users is avoided, and the use experience of the users can be improved. In a preferred embodiment, the casing 200 is provided with the air outlet 202 at the upper portion thereof surrounding the laminar flow fan 300 for one circle, so that 360-degree uniform air supply is realized, and the use experience of a user is further improved.

Fig. 3 is a schematic exploded view of an air purifier 100 according to another embodiment of the present invention. The air purifier 100 of the embodiment of the present invention further includes: a wind shielding member 500 disposed outside the laminar flow fan 300 and between the casing 200 and the laminar flow fan 300, and having a gap 501; the casing 200 is provided with an air outlet 202 at a position corresponding to the notch 501, and laminar air flows out of the casing 200 through the notch 501 and the air outlet 202 in sequence. For example, when the installation position of the air purifier 100 is at a corner where two wall surfaces are perpendicular, the wind shielding member 500 is configured to have a notch 501 on a side surface thereof facing away from the wall surfaces, the air outlet 202 is configured at a position corresponding to a side surface of the housing 200, and meanwhile, the height of the notch 501 is slightly higher than the height of the air outlet 202, and the width of the notch 501 is slightly larger than the width of the air outlet 202, so that the laminar flow wind generated by the laminar flow fan 300 is acted by the wind shielding member 500, and only the laminar flow wind blows out of the air purifier 100 from the notch 501 through the air outlet 202 located at the front end thereof. In one embodiment, the wind screen 500 has a substantially square cross-section and a cavity at the center for receiving the laminar flow fan 300, and a notch 501 is formed at one or more sides thereof to meet the user's requirements for different shapes of the housing 200, different installation locations, and different air supply requirements of the air purifier 100.

Fig. 4 is a schematic exploded view of an air purifier 100 according to still another embodiment of the present invention. The air purifier 100 of the embodiment of the invention is that the upper part and the lower part in the shell 200 are respectively provided with a laminar flow fan 300 and a motor 400, and the upper part and the lower part of the shell 200 are respectively provided with an air outlet 202 corresponding to the two laminar flow fans 300; the annular filter element 600 is vertically disposed in the casing 200 and located between the two laminar flow fans 300, and the casing 200 surrounds the annular filter element 600 at the middle thereof to form the air inlet 201, so that the air supply range of the air purifier 100 in the vertical direction can be enlarged, and the global purification can be realized.

In some embodiments, laminar flow fan 300 further comprises: drive disk 305 and link 306. The driver disks 305 are arranged in parallel with a plurality of annular disks 301 at a spacing. A connector 306 extends through the drive disk 305 and the plurality of ring disks 301 to connect the plurality of ring disks 301 to the drive disk 305. The motor 400 is configured to directly drive the drive disk 305 to rotate, and the drive disk 305 rotates the plurality of annular disks 301.

In some embodiments, the driving disk 305 of the laminar flow fan 300 is formed at the center thereof with a recess 351 toward the plurality of ring disks 301, and the motor 400 is fixedly disposed in the recess 351. Fig. 5 is a schematic perspective view of the laminar flow fan 300. Fig. 8 is a schematic cross-sectional view of the laminar flow fan 300 shown in fig. 5. Fig. 9 is a schematic perspective view of another view of the laminar flow fan 300 shown in fig. 5. Fig. 10 is a schematic perspective view of still another view angle of the laminar flow fan 300 shown in fig. 5. The air purifier 100 of the embodiment of the present invention may further include: and a fixing mechanism 401 disposed in the housing 200 for fixing the motor 400. Fig. 11 is a schematic cross-sectional view of the engagement of the fixing mechanism 401, the motor 400, and the laminar flow fan 300. Fig. 12 is a schematic exploded view of the motor 400 and the fixing mechanism 401. The fixing mechanism 401 includes a fixing plate 411 and a fixing frame 412, and the motor 400 is disposed between the fixing plate 411 and the fixing frame 412. The fixing frame 412 has a main body 421 and a claw 422 extending from the main body 421 toward the fixing plate 411. The body 421 has a through hole 423, and an output shaft of the motor 400 extends out of the fixing frame 412 from the through hole 423 and is connected to the laminar flow fan 300. The claw 422 is fixed to the fixing plate 411 and is disposed to match the recess 351. A connection hole 352 is formed at the center of the recess 351, and an output shaft of the motor 400 is inserted into the connection hole 352 and fixed to the driving disk 305. The fixing plate 411 is provided with a plate attachment hole 414, the claw portion 422 is provided with a claw attachment hole 424, and the claw portion 422 and the fixing plate 411 are fixed by using a bolt or the like. Further, the fixing plate 411 is provided with a reinforcing rib 415.

In other embodiments, the drive disk 305 of the laminar flow fan 300 has a flat surface, and the motor 400 is fixedly disposed on the flat surface of the drive disk 305. Fig. 13 is a schematic front view of a laminar flow fan 110 with a drive disk 305 having a flat surface. Fig. 14 is a schematic perspective view of another perspective view of the laminar flow fan 110 shown in fig. 13. In a preferred embodiment, the lower surface of the driving disk 305 is further provided with an inverted conical protrusion 353, and the inverted conical protrusion 353 can effectively guide the air entering the laminar flow fan 300 through the air inlet channel 302 into the gap between the disks, thereby improving the efficiency of forming laminar air.

Fig. 15 is a schematic view of air circulation of the laminar flow fan 110 shown in fig. 13, in which air inlet channels 302 are formed at the centers of a plurality of annular disks 301 to allow air outside the laminar flow fan 300 to enter; a plurality of discharge ports 303 are formed in gaps between the plurality of annular disks 301 to blow out laminar air.

The connection 306 of the laminar flow fan 300 may be a blade 361, a connection rod 362, or the like.

Fig. 16 is a schematic cross-sectional view of the laminar flow fan 110 shown in fig. 13. In this embodiment, the connecting member 306 is a blade 361, and the cross section of the blade 361 has two curves sequentially arranged along the rotation direction of the annular disc 301, and the length of the chord 373 of the two curves has a linear relationship with the air volume of the laminar flow fan 110, so that the air volume of the laminar flow fan 110 can be greatly increased by increasing the length of the chord 373, and the laminar flow air circulation is promoted. It should be noted that the two curves may be arcs, non-arcs, straight lines, and the like, and the straight line may be a special curve. The length of the chord line 373 may be the distance between the two ends of the two curves, when the distance between the two ends of the two curves is the same. When the distances between the two end points of the two curves are different, if the two ends of the two curves are not intersected, the length of the chord line 373 may be the length of the connecting line of the middle points of the curves of the cross section of the blade 361 except the two curves; if only one end of the two curves intersects, the length of the chord line 373 may be the length of the line connecting the midpoint of the cross-section of the vane 361 except for the two curves and the end point of the intersection of the two curves.

In a preferred embodiment, the vanes 361 are plural and are evenly spaced throughout the drive disk 305 and the plurality of annular disks 301. The blades 361 uniformly penetrate through the driving disk 305 and the annular disks 301 at intervals, so that the driving disk 305 and the annular disks 301 can be stably connected, and further, when the motor 400 drives the driving disk 305 to rotate, the driving disk 305 can stably drive the annular disks 301 to rotate, and the working reliability of the laminar flow fan 110 is improved.

Fig. 17 is a schematic diagram showing the relationship between the length of the chord 373 and the wind pressure of the laminar flow fan 110 shown in fig. 13 when the outer diameter, the inner diameter, the number of layers, the pitch, the thickness, the installation angle of the blades 361, and the rotation speed of the motor 400 are all kept constant, wherein the abscissa axis refers to the length of the chord 373 of the blades 361, and the wind pressure refers to the pressure difference between the outlet 303 and the inlet of the air inlet channel 302. Note that the outer diameter of the annular disk 301 is the radius of its outer circumference, and the inner diameter is the radius of its inner circumference. The air boundary layer 304 rotates from inside to outside to form laminar wind, which moves centrifugally and thus leaves the outlet 303 at a higher velocity than the air entering the air inlet channel 302. The pressure difference between the outlet 303 and the inlet of the air intake channel 302 is the wind pressure, and the length of the chord 373 is in linear relation with the wind pressure. The wind pressure of the laminar flow fan 110 can be greatly improved by increasing the length of the chord 373, and the comprehensive performance of the laminar flow fan 110 is effectively guaranteed.

Given the limited space inherent in the air purifier 100, there is a constraint on the overall footprint of the laminar flow fan 110. Specifically, considering that the thickness of the laminar flow fan 110 is not too large, the number of the annular disks 301, the distance between two adjacent annular disks 301, and the thickness of the annular disks 301 may be correspondingly constrained; the outer diameter of the annular disk 301 may be correspondingly constrained in view of the lateral footprint of the laminar flow fan 110 not being too large. For example, the outer diameter of each annular disc 301 may be set to 170mm to 180mm, and the inner diameter of each annular disc 301 is set to 110mm to 120mm, so that the air volume may be effectively increased, and the air outlet of the laminar flow fan 110 is ensured to meet the use requirements of users. When the outer diameter and the inner diameter of the annular disk 301 are constant, the longer the chord 373 is, the greater the air volume and the wind pressure of the laminar flow fan 110 are, but the length of the chord 373 is also restricted to a certain extent, so as to avoid the blade 361 from excessively penetrating the annular disk 301, which leads to the reduction of the stability of the laminar flow fan 110. In summary, the length of the chord 373 can be set to the maximum range that can be achieved, so that the wind volume and the wind pressure of the laminar flow fan 110 can meet the use requirements of users. In a preferred embodiment, the annular disk 301 has an outer diameter of 175mm, an inner diameter of 115mm, 8 layers, a pitch of 13.75mm, a thickness of 2mm, a blade 361 mounted at an angle of 25.5 °, and a motor 400 rotating at 1000rpm, it has been found that the wind volume and pressure are both greatly increased and substantially linear after increasing the length of the chord 373. The length of the chord 373 is set to the maximum range that can be achieved while ensuring the stability of the laminar flow fan 11040mm to 42 mm. Moreover, when the length of the chord 373 is set to 42mm, the air volume of the laminar flow fan 110 can reach 1741m³And h, the wind pressure can reach 118.9Pa, and the use requirements of users can be completely met.

In some embodiments, the blade 361 may be a double arc blade 310, the cross section of which has a double arc convex toward the direction of rotation of the annular disk 301, and includes an inner arc 371 and a back arc 372 arranged in sequence along the direction of rotation of the annular disk 301, and the inner arc 371 and the back arc 372 have the same center and are arranged in parallel. Fig. 18 is a schematic cross-sectional view of a laminar flow fan 110 having a double-arc blade 310. In a preferred embodiment, the outer diameter of each annular disc 301 is 170mm to 180mm, the inner diameter of each annular disc 301 is 110mm to 120mm, the difference between the outer diameter and the inner diameter of each annular disc 301 is about 60mm, the distance between the two ends of the inner arc 371 and the distance between the two ends of the back arc 372 are the same, the length of the chord line 373 is the distance between the two ends of the inner arc 371 or the back arc 372 and is set to 40mm to 42mm, so that the two ends of the inner arc 371 and the back arc 372 are respectively 10mm away from the inner circumference and the outer circumference of the annular disc 301, and the length of the chord line 373 is set to the maximum range which can be reached under the premise of ensuring the stability of the laminar flow fan 110, so that the air volume and the air pressure of the laminar flow fan 110 can meet the use requirements of users.

Fig. 19 is a schematic diagram showing the relationship between the installation angle α of the double-arc blade 310 and the air volume and the wind pressure when the outer diameter, the inner diameter, the number of layers, the pitch, the thickness, the chord length of the double-arc blade 310 and the rotation speed of the motor 400 are all kept constant, and the abscissa axis refers to the installation angle of the double-arc blade 310, that is, an included angle formed by a chord line 373 between two end points of an inner arc 371 and a connecting line 374 passing through the midpoint of the chord line 373 and the central axis of the annular disk 301 on the same cross section of the double-arc blade 310 and the annular disk 301.

In other embodiments, the blade 361 may be an aviation blade 320, the cross section of which has a double arc convex toward the direction of rotation of the annular disk 301, and the double arc includes an inner arc 371 and a back arc 372 arranged in sequence along the direction of rotation of the annular disk 301, and the inner arc 371 and the back arc 372 have different centers and both ends intersect. Fig. 20 is a cross-sectional schematic view of a laminar flow fan 110 having aero blades 320.

Fig. 21 is a schematic diagram of the relationship between the installation angle α of the aviation blade 320 and the air volume and the air pressure when the outer diameter, the inner diameter, the number of layers, the pitch, the thickness, the chord length of the aviation blade 320 and the rotation speed of the motor 400 of the laminar flow fan 110 shown in fig. 20 are all kept unchanged, and the abscissa axis refers to the installation angle of the aviation blade 320, that is, the included angle formed by the chord 373 between the middle points of the inner arc 371 or the back arc 372 and the connecting line 374 passing through the middle point of the chord 373 and the central axis of the annular disk 301 on the same cross section of the aviation blade 320 and the annular disk 301.

The annular disk 301 of the laminar flow fan 300 may also be arranged according to one or more of the following configurations: the distance between two adjacent annular disks 301 is gradually increased along the flowing direction of air in the air inlet channel 302; the inner diameters of the plurality of annular disks 301 are gradually reduced along the flowing direction of the airflow in the air inlet channel 302; each annular disc 301 is an arc-shaped disc that gradually approaches the drive disc 305 from the inside to the outside.

In some embodiments, the plurality of annular disks 301 of the laminar flow fan 300 are arranged in parallel at intervals with the same central axis, and the interval between two adjacent annular disks 301 is gradually increased along the direction in which air flows in the air intake passage 302. Fig. 22 is a schematic front view of the laminar flow fan 110 in which the pitch of the annular disks 301 is gradually changed. The inventor finds that, through multiple experiments, as the distance between two adjacent annular disks 301 gradually increases along the flowing direction of air in the air inlet channel 302, the air volume of the laminar flow fan 110 can be effectively increased, so that the air outlet of the laminar flow fan 110 meets the use requirement of a user.

Taking the laminar flow fan 110 disposed at the upper portion in the housing 200 as an example, fig. 24 is a schematic diagram illustrating a relationship between gradual change of the pitch of the plurality of ring disks 301 and the air volume and the air pressure when the outer diameter, the inner diameter, the number, the thickness, and the rotation speed of the motor 400 of the laminar flow fan 110 shown in fig. 22 are all kept unchanged, wherein the abscissa axis refers to a change amount of the pitch between two adjacent ring disks 301 along the direction from bottom to top. As shown in fig. 24, when all the above mentioned parameters are kept unchanged, the distance between every two adjacent annular disks 301 in the plurality of annular disks 301 gradually changes from bottom to top, which has a large influence on the air volume and a small influence on the air pressure; when the variation of the distance between two adjacent annular disks 301 along the direction from bottom to top, which is represented by the abscissa axis, is a positive number, it is described that the distance between every two adjacent annular disks 301 in the plurality of annular disks 301 gradually increases from bottom to top; when the variation of the spacing between two adjacent annular disks 301 along the direction from bottom to top, which is represented by the abscissa axis, is a negative number, it indicates that the spacing between every two adjacent annular disks 301 in the plurality of annular disks 301 gradually decreases from bottom to top. Therefore, as can be seen from fig. 24, when the variation amount of the pitch between every two adjacent annular disks 301 of the plurality of annular disks 301 is-1 mm, 1mm and 2mm, the air volume and the air pressure of the laminar flow fan 110 are greatly improved.

As mentioned above, the connecting member 306 of the laminar flow fan 300 in the embodiment of the present invention may be a connecting rod 362. Fig. 23 is a schematic perspective view of the laminar flow fan 110 shown in fig. 22. The connecting rods 362 may be a plurality of rods, and are uniformly spaced throughout the edge portions of the drive disk 305 and the plurality of annular disks 301. The connecting rods 362 uniformly penetrate through the edge portions of the driving disk 305 and the annular disks 301 at intervals, so that the connection relationship between the driving disk 305 and the annular disks 301 can be ensured to be stable, and further, when the motor 400 drives the driving disk 305 to rotate, the driving disk 305 can stably drive the annular disks 301 to rotate, and the working reliability of the laminar flow fan 110 is improved. Meanwhile, when the connecting member 306 is the connecting rod 362, the rotation speed of the motor 400 is approximately linear with the air volume of the laminar flow fan 110, so that in a preferred embodiment, the motor 400 can be further configured to: the rotating speed of the motor 400 is determined according to the obtained target air volume of the laminar flow fan 110. That is, the target air volume of the laminar flow fan 110 may be obtained first, and then the rotation speed of the motor 400 may be determined according to a linear relationship between the target air volume and the rotation speed of the motor 400. The target air volume may be obtained by an input operation of the user. In a preferred embodiment, the outer diameter of the annular disc 301 is 175mm, the inner diameter is 115mm, the number of layers is 8, and the distance between two adjacent annular discs 301 is sequentially set from bottom to top: 13.75mm, 14.75mm, 15.75mm, 16.75mm, 17.75mm, 18.75mm, 19.75mm, when the thickness is 2mm, the linear relation between the rotating speed of the motor 400 and the air volume of the laminar flow fan 110 is more obvious.

In some embodiments, the inner diameters of the plurality of annular disks 301 of the laminar flow fan 300 of the embodiment of the present invention are gradually reduced along the direction of the airflow flowing in the air intake channel 302. Taking the laminar flow fan 300 disposed at the upper portion in the housing 200 as an example, fig. 25 is a schematic cross-sectional view of the laminar flow fan 300 in which the inner diameter of the annular disk 301 is gradually changed. Fig. 26 is a schematic diagram showing the relationship between the gradual change of the inner diameter of a plurality of ring disks 301 and the air volume and the air pressure when the outer diameter, the pitch, the number, the thickness and the rotation speed of the motor 400 of the laminar flow fan 110 having the laminar flow fan 300 shown in fig. 25 are all kept constant, wherein the abscissa axis refers to the change amount of the inner diameter of each ring disk 301 and the inner diameter of the ring disk 301 adjacent below. As shown in fig. 26, when all the above mentioned parameters are kept unchanged, the inner diameters of the plurality of annular disks 301 gradually change from bottom to top, which has a large influence on the air volume and a small influence on the air pressure. When the variation of the inner diameter of each annular disc 301 represented by the abscissa axis and the inner diameter of the adjacent annular disc 301 below is a positive number, it indicates that the inner diameters of the plurality of annular discs 301 gradually increase from bottom to top; when the variation of the inner diameter of each annular disc 301 and the inner diameter of the adjacent annular disc 301 below is negative, the inner diameters of the annular discs 301 gradually decrease from bottom to top. As shown in fig. 26, the inner diameters of the plurality of annular disks 301 gradually decrease from bottom to top, so that the air volume increases and the air pressure decreases slightly; when the inner diameters of the plurality of annular disks 301 gradually increase from bottom to top, the wind pressure slightly increases, and the wind volume greatly decreases. In a preferred embodiment, the outer diameter of the annular disc 301 is 175mm, the maximum inner diameter of the annular disc 301 is 115mm, the distance is 13.75mm, the number is 8, the thickness is 2mm, the rotation speed of the motor 400 is 1000rpm, and then, considering the overall consideration of the air volume and the air pressure, the variation between the inner diameter of each annular disc 301 and the inner diameter of the adjacent annular disc 301 below may be set to-5 mm, that is, the inner diameters of the 8 annular discs 301 are respectively: 115mm, 110mm, 105mm, 100mm, 95mm, 90mm, 85mm, 80 mm.

In some embodiments, the annular disc 301 of the laminar flow fan 300 is an arcuate disc that gradually approaches the drive disc 305 from the inside to the outside. Taking the laminar flow fan 300 arranged at the upper part in the casing 200 as an example, each annular disc 301 is set to be an arc-shaped disc which gradually rises from inside to outside and protrudes upwards, so that the angle of the external air entering the laminar flow fan 300 is more consistent with the flow of the fluid, the external air entering the laminar flow fan 300 is more facilitated, the air volume loss is effectively reduced, and the air outlet of the laminar flow fan 110 is ensured to meet the use requirements of users. Fig. 27 is a schematic view of the central angle θ of the inner and outer diameter connecting lines of the plurality of annular disks 301 on the same longitudinal section passing through the central axis. Fig. 28 is a schematic diagram showing the relationship between the central angle θ and the air volume and the air pressure when the outer diameter, the number of layers, the pitch, the thickness of the annular disk 301 and the rotation speed of the motor 400 are all kept constant. As shown in fig. 28, when each of the above-mentioned parameters is kept constant, as the central angle θ is gradually increased, the air volume is increased and then decreased, and the air pressure is slightly increased. In a preferred embodiment, the annular disks 301 have an outer diameter of 175mm, a number of 10 layers, a pitch of 13.75mm, a thickness of 2mm, and a rotation speed of the motor 400 of 1000rpm, and the central angle θ may be set to 9 ° to 30 ° in consideration of the air volume and the wind pressure. As shown in fig. 28, when the central angle θ is set to 15 °, the air volume of the laminar flow fan 110 reaches the maximum value.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. An air purifier, comprising:

the shell is provided with an air inlet and an air outlet;

laminar flow fan, set up in the casing, it is formed with inlet air channel, laminar flow fan passes through fluid viscosity effect disturbance warp get into after the annular filter filters inlet air channel's air forms laminar flow wind, laminar flow wind certainly the air outlet is discharged the casing.

2. The air purifier of claim 1,

the laminar flow fan includes:

the laminar flow fan comprises a plurality of annular discs which are arranged in parallel at intervals, have the same central axis and have the centers which jointly form the air inlet channel, and air filtered by the annular filter element enters the air inlet channel to reach gaps among the annular discs; and

and the motor is connected with the laminar flow fan and is configured to drive the plurality of annular discs to rotate, so that the air boundary layer close to the surfaces of the plurality of annular discs is driven by the plurality of rotating annular discs to rotate and move from inside to outside to form the laminar flow wind.

3. The air purifier of claim 2,

the laminar flow fan and the motor are arranged at the upper part in the shell, and the air outlet is formed in the position, corresponding to the laminar flow fan, of the upper part of the shell;

the annular filter element is vertically arranged below the laminar flow fan.

4. The air purifier of claim 3,

the shell is provided with the air outlet at the upper part thereof, and surrounds the laminar flow fan for one circle.

5. The air purifier of claim 2,

the upper part and the lower part in the shell are respectively provided with the laminar flow fan and the motor, and the upper part and the lower part of the shell are respectively provided with the air outlets corresponding to the two laminar flow fans;

the annular filter element is vertically arranged between the two laminar flow fans, and the middle of the shell surrounds the annular filter element for a circle to form the air inlet.

6. The air purifier of claim 2, further comprising:

the wind shielding piece is arranged outside the laminar flow fan, is positioned between the shell and the laminar flow fan and is provided with a gap;

the shell is arranged at the position, corresponding to the notch, of the air outlet, and laminar flow air sequentially passes through the notch and flows out of the shell through the air outlet.

7. The air purifier of claim 2,

the laminar flow fan further includes:

a driving disk arranged in parallel with the plurality of annular disks at intervals; and

a connector extending through the drive disk and the plurality of annular disks to connect the plurality of annular disks to the drive disk;

the motor is configured to directly drive the drive disk to rotate, and the drive disk drives the plurality of annular disks to rotate.

8. The air purifier of claim 7,

the driving disk is formed with a recess at its center toward the plurality of annular disks;

the air purifier further includes:

the fixing mechanism is arranged in the shell and comprises a fixing plate and a fixing frame, and the motor is arranged between the fixing plate and the fixing frame; wherein

The fixing frame is provided with a body part and a clamping claw part extending from the body part to the fixing plate;

the body part is provided with a through hole, and an output shaft of the motor extends out of the fixing frame from the through hole and then is connected with the laminar flow fan;

the clamping claw part is used for being fixed with the fixing plate and is matched with the concave part.

9. The air purifier of claim 7,

the connecting piece is a blade, the cross section of the blade is provided with a double-arc protruding towards the rotating direction of the annular disk, and the double-arc comprises an inner arc and a back arc which are sequentially arranged along the rotating direction of the annular disk; wherein the content of the first and second substances,

the inner arc and the back arc have different circle centers and the two ends are intersected, or

The inner arc and the back arc have the same circle center and are arranged in parallel.

10. The air purifier of claim 7,

the annular disc is arranged according to one or more of the following structures:

the inner diameters of the annular disks are gradually reduced along the flowing direction of the airflow in the air inlet channel;

each annular disc is an arc disc which is gradually close to the driving disc from the inner side to the outer side.