CN111437669A - Air purifier - Google Patents

Abstract

The invention provides an air purifier, comprising: a casing on which an air inlet and an air outlet are arranged; an annular filter element arranged in the casing, and external air enters the casing from the air inlet and reaches the The annular filter element is used for filtering; the laminar flow fan is arranged in the casing and forms an air inlet channel, and the laminar flow fan disturbs the air entering the air inlet channel after being filtered by the annular filter element through the fluid viscosity effect. Laminar flow wind, the laminar flow wind is discharged from the housing from the air outlet. The air supply process of the air purifier of the present invention has low noise, high air volume and large air pressure.

Description

air purifier

technical field

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

Background technique

With the rapid development of the economy, the massive consumption of energy produces a large amount of harmful substances. The earth that people live in is full of particulate matter, sulfur oxides, nitrogen oxides and hydrocarbons, which seriously threaten people's health. In order to freshen the air, an air purifier is needed to purify the air. At present, air purifiers mainly use centrifugal fans or axial fans to supply air in one direction. The blades periodically impact the passing airflow, resulting in obvious rotation noise, resulting in high air supply noise. Under the limitation of performance indicators, the noise value is close to the limit. . In addition, the centrifugal fan needs the cooperation of the volute to achieve the air supply effect, and the air flow will also be impacted at the volute tongue, resulting in strong turbulent noise. In addition, most users believe that the clean air produced by existing air purifiers cannot be evenly distributed in a room or a closed space, and has certain distribution limitations.

SUMMARY OF THE INVENTION

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

A further object of the present invention is to prevent the air from the air purifier from blowing directly to the user, thereby improving the user's experience.

Another further object of the present invention is to make the air purifier realize 360° air supply.

A further object of the present invention is to expand the vertical air supply range of the air purifier to achieve global purification.

The present invention provides the following technical solutions:

An air purifier comprising:

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

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

The laminar flow fan is arranged in the shell, and an air inlet channel is formed in the center. The laminar flow fan disturbs the air that enters the air inlet channel after being filtered by the annular filter element through the fluid viscosity effect to form laminar flow wind, and the laminar flow wind exits the shell from the air outlet.

Optionally, the laminar flow fan includes:

The laminar flow fan includes a plurality of annular discs, which are arranged in parallel with each other, have the same central axis and form an air inlet channel in the center, and the air filtered by the annular filter element enters the air inlet channel and reaches the plurality of annular discs gaps between sheets; and

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

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

Optionally, the casing is provided with an air outlet around the laminar flow fan at its upper part.

Optionally, the upper and lower parts of the casing are respectively provided with a laminar flow fan and a motor, and the upper and lower parts of the casing are respectively provided with air outlets at positions corresponding to the two laminar flow fans; Between the laminar flow fans, an air inlet is arranged around the annular filter element in the middle of the casing.

Optionally, the laminar flow fan further includes: a wind shield, disposed outside the laminar flow fan, between the casing and the laminar flow fan, with a gap thereon; an air outlet is provided on the casing at a position corresponding to the gap , the laminar air flows out of the casing through the gap and the air outlet in turn.

Optionally, the laminar flow fan further comprises: a driving disc, which is arranged in parallel with the plurality of annular discs; and a connecting member, which penetrates the driving disc and the plurality of annular discs, so as to connect the plurality of annular discs to the The drive disc; the motor is configured to directly drive the drive disc to rotate, and then the drive disc drives the plurality of annular discs to rotate.

Optionally, the driving disc is formed with a depression at the center of the plurality of annular discs; the motor is fixedly arranged in the depression; the air purifier further includes: a fixing mechanism, which is arranged in the casing and includes a fixing plate and a fixing frame , the motor is arranged between the fixing plate and the fixing frame; wherein the fixing frame has a body part and a claw part extending from the body part towards the fixing plate; the body part is provided with a through hole, and the output shaft of the motor extends out of the fixing frame from the through hole It is then connected with the laminar flow fan; the claw portion is used for fixing with the fixing plate and is matched with the recessed portion.

Optionally, the upper surface of the driving disc is a flat surface, and the lower surface thereof has an inverted conical protrusion; the motor is fixedly arranged on the flat surface of the driving disc.

Optionally, the connector is a blade, and its cross section has two curves arranged in sequence along the rotation direction of the annular disc, and the chord length of the two curves is linearly related to the air volume of the laminar flow fan. Further, the cross section of the blade has double arcs protruding towards the direction of the rotation of the annular disc, including the inner arc and the back arc arranged in sequence along the rotation direction of the annular disc; wherein, the inner arc and the back arc have different circle centers And both ends meet, or the inner arc and the back arc have the same center and are set in parallel.

Optionally, the annular discs are arranged according to one or more of the following structures:

The distance between two adjacent annular discs increases gradually along the direction of airflow in the air inlet channel;

The inner diameters of the plurality of annular discs gradually decrease along the direction of the airflow in the air inlet channel;

Each annular disc is an arc-shaped disc gradually approaching the drive disc from the inner side to the outer side.

The air purifier of the present invention realizes laminar air supply by arranging an annular filter element and a laminar flow fan in the casing, and using the laminar flow fan to disturb the air filtered by the annular filter element through the fluid viscosity effect, the air supply process has low noise, high air volume, The wind pressure is large, which effectively improves the user experience of the air purifier.

Further, in the air purifier of the present invention, by arranging the laminar flow fan and the air outlet on the upper part, and arranging the annular filter element below the laminar flow fan, air is supplied from the upper part, avoiding the direct blowing of the air to the user, and improving the user's experience. Under optimal conditions, 360° uniform air supply can be achieved.

Further, the air purifier of the present invention can be provided with laminar flow fans at the upper and lower parts of the air purifier respectively, and an annular filter element can be arranged between the two sets of laminar flow fans, which expands the air supply range of the air purifier in the vertical direction and realizes global purification.

Further, the air purifier of the present invention is based on an annular filter element, and air inlets can be provided all around the casing to achieve 360° air intake.

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

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

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

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

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

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

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

FIG. 6 is a schematic diagram of the air supply principle of the laminar flow fan of the air purifier shown in FIG. 1 .

FIG. 7 is a speed distribution and force distribution diagram of the 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 the laminar flow fan shown in FIG. 5 from another perspective.

FIG. 10 is a schematic perspective view of the laminar flow fan shown in FIG. 5 from another perspective.

11 is a schematic cross-sectional view of a fixing mechanism, a motor and a laminar flow fan of an air purifier according to an embodiment of the present invention.

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

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

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

FIG. 15 is a schematic diagram 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 .

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

18 is a schematic cross-sectional view of a laminar flow fan of an air purifier with double arc blades according to an embodiment of the present invention.

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

20 is a schematic cross-sectional view of a laminar flow fan of an air purifier with aviation blades according to an embodiment of the present invention.

Fig. 21 is a schematic diagram showing the relationship between the installation angle of the aviation blade and the air volume and air pressure.

FIG. 22 is a schematic front view of the laminar flow fan of the laminar flow fan of the air purifier in which the pitch of the annular disks of the laminar flow fan 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 showing the relationship between the gradual change in the pitch of the plurality of annular discs of the laminar flow fan shown in FIG. 22 and the air volume and air pressure.

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

FIG. 26 is a schematic diagram showing the relationship between the inner diameter gradient of multiple annular discs of the laminar flow fan shown in FIG. 25 and the air volume and air pressure.

Fig. 27 is a line connecting the inner and outer diameters of a plurality of annular discs of the laminar flow fan of the laminar flow fan of the air purifier according to an embodiment of the present invention on the same longitudinal section passing through the central axis of the arc-shaped disc Schematic diagram of the central angle.

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 air pressure.

Detailed ways

FIG. 1 is a schematic perspective view of an air purifier 100 according to an 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 the embodiment 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 arranged in the casing 200, and the external 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 arranged in the casing 200, and an air inlet passage 302 is formed in the center thereof. The laminar flow fan 110 disturbs the air that enters the air inlet passage 302 after being filtered by the annular filter element 600 through the fluid viscosity effect to form laminar flow wind, and the laminar flow air flows out of the air inlet. The tuyere 202 is discharged from the casing 200 .

In the air purifier 100 of the embodiment of the present invention, the annular filter element 600 and the laminar flow fan 110 are arranged in the housing 200, and the laminar flow fan 110 is used to disturb the air filtered by the annular filter element 600 through the fluid viscosity effect to realize laminar air supply, The air supply process has low noise, high air volume and large air pressure, which effectively improves the user experience of the air purifier 100, and has a novel appearance, good functions and excellent quality.

In some embodiments, laminar flow fan 110 includes laminar flow fan 300 and 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 discs 301 . The plurality of annular discs 301 are arranged in parallel with each other, have the same central axis, and the center together forms an air inlet passage 302 , and the air filtered by the annular filter element 600 enters the air inlet passage 302 The gaps between the plurality of annular disks 301 are reached. The motor 400 is connected to the laminar flow fan 300 and is configured to drive the plurality of annular discs 301 to rotate, so that the air boundary layer 304 close to the surface of the plurality of annular discs 301 is driven by the rotating plurality of annular discs 301 to rotate and move from the inside to the outside Laminar winds are formed. The air boundary layer 304 is a thin air layer near the surface of each disc.

FIG. 6 is a schematic diagram of the air supply principle of the laminar flow fan 110 . The motor 400 drives a plurality of annular discs 301 to rotate at a high speed, and the air in the interval of each annular disc 301 contacts and moves with each other, and the air boundary layer 304 near the surface of each annular disc 301 is affected by the viscous shear force τ. The rotating annular disk 301 is driven to rotate and move from the inside to the outside to form a laminar airflow. 7 is a speed distribution and force distribution diagram of the laminar flow fan 110 of the air purifier 100 according to the embodiment of the present invention, which is the viscous shear force distribution τ(y) and the speed distribution u(y) received by the air boundary layer 304 Schematic. The viscous shear force experienced by the air boundary layer 304 is actually the resistance generated by each disk to the air boundary layer 304 . The abscissa axis in FIG. 7 refers to the distance in the moving direction of the air boundary layer 304 , and the ordinate axis refers to the height of the air boundary layer 304 in the direction perpendicular to the moving direction. _ve is the airflow velocity at each point in the air boundary layer 304 , δ is the thickness of the air boundary layer 304 , and τ _w is the viscous shear force at the surface of the annular disk 301 . The variable y in τ(y) and u(y) refers to the height of the cross section of the air boundary layer 304 in the direction perpendicular to the moving direction, and L is a certain point on the inner circumference of the annular disk 301 and a certain point on the surface of the annular disk 301. distance between points. Then τ(y) is the viscous shear force distribution at the distance L, when the height of the air boundary layer 304 section is y; u(y) is at the distance L, the height of the air boundary layer 304 section is y speed distribution at time.

The overall shape of the housing 200 of the air purifier 100 in the embodiment of the present invention can be designed according to actual needs, such as a cylinder, a rectangular parallelepiped, a cube, and other special-shaped bodies. In some embodiments, the housing 200 has a rectangular parallelepiped structure with four sides and upper and lower bottom surfaces. One or more sides of the four sides are selected to set the air inlet 201 to form the air inlet side. In one embodiment, air inlets 201 are provided on four sides of the housing 200 to achieve 360° air intake.

The cross section of the annular filter element 600 is annular, and the center is a hollow channel. In order to make the air filtered by the annular filter element 600 move into the air inlet channel 302 as much as possible, in some embodiments, the air purifier 100 of the embodiment of the present invention further includes: The space between the filter elements 600 is used to define the direction of the air filtered by the annular filter element 600 and reach its hollow passage, so as to prevent it from flowing out from the gap between the annular filter element 600 and the laminar flow fan 300 . The specific shape of the partition plate 101 can be designed according to the structures of the laminar flow fan 300 , the annular filter element 600 and the casing 200 . For example, in one embodiment, the casing 200 is in the shape of a cuboid, the cross section of the partition plate 101 is also square, and a circular hollow structure is formed in the central part thereof. One side of the circular hollow structure is a hollow channel, and the other side is an inlet. Air channel 302 .

As shown in FIG. 2 , in some embodiments, the air purifier 100 of the embodiment of the present invention is provided with a laminar flow fan 300 and a motor 400 in the upper part of the casing 200 , and the upper part of the casing 200 corresponds to the laminar flow fan 300 . The air outlet 202 is provided at the position; the annular filter element 600 is vertically arranged in the casing 200 extending in the up-down direction, and is located below the laminar flow fan 300 . The air purifier 100 according to the embodiment of the present invention emits air from the upper part to avoid blowing the user directly, which can improve the user's use experience. In a preferred embodiment, the casing 200 is provided with an air outlet 202 around the laminar flow fan 300 at the upper portion thereof, so as to achieve 360° uniform air supply and further improve the user experience.

FIG. 3 is a schematic exploded view of an air purifier 100 according to another embodiment of the present invention. The air purifier 100 according to the embodiment of the present invention further includes: a wind shield 500 disposed outside the laminar flow fan 300, between the casing 200 and the laminar flow fan 300, and having a gap 501 thereon; the casing 200 corresponding to the An air outlet 202 is provided at the position of the notch 501 , and the laminar flow 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 the corner of the two walls perpendicular to the wall, the wind shield 500 is set to have a gap 501 on the side facing away from the wall, and the air outlet 202 is set at the corresponding side position of the housing 200 At the same time, the height of the gap 501 is slightly higher than the height of the air outlet 202, and the width 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 affected by the wind shield 500, and only passes from the gap 501 through the The air outlet 202 at the front end blows out the air purifier 100 without wasting laminar airflow. In one embodiment, the wind shield 500 is a structure with a substantially square cross-section and a cavity in the center that can accommodate the laminar flow fan 300 , and a gap 501 is provided on one or more sides thereof to meet users' needs for different shapes of shells. The requirements of the air purifier 100 for the body 200, different installation positions, and different air supply requirements.

FIG. 4 is a schematic exploded view of an air purifier 100 according to yet another embodiment of the present invention. In the air purifier 100 of the embodiment of the present invention, the upper and lower parts of the casing 200 are respectively provided with a laminar flow fan 300 and a motor 400 , and the upper and lower parts of the casing 200 are respectively set at the positions corresponding to the two laminar flow fans 300 The air outlet 202; the annular filter element 600 is vertically arranged in the casing 200 between the two laminar flow fans 300. The casing 200 is provided with an air inlet 201 around the annular filter element 600 in the middle of the casing 200, so that the air purifier 100 can be enlarged. In the vertical direction of the air supply range, to achieve global purification.

In some embodiments, the laminar flow fan 300 further includes: a driving disc 305 and a connecting member 306 . The drive disk 305 is arranged in parallel with the plurality of annular disks 301 at intervals. The connecting member 306 penetrates the driving disc 305 and the plurality of annular discs 301 to connect the plurality of annular discs 301 to the driving disc 305 . The motor 400 is configured to directly drive the driving disk 305 to rotate, and then the driving disk 305 drives the plurality of annular disks 301 to rotate.

In some embodiments, the driving disc 305 of the laminar flow fan 300 is formed with a concave portion 351 at its center toward the plurality of annular discs 301 , and the motor 400 is fixedly disposed in the concave portion 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 the laminar flow fan 300 shown in FIG. 5 from another perspective. FIG. 10 is a schematic perspective view of the laminar flow fan 300 shown in FIG. 5 from another perspective. The air purifier 100 according to the embodiment of the present invention may further include: a fixing mechanism 401 disposed in the housing 200 for fixing the motor 400 . FIG. 11 is a schematic cross-sectional view of the cooperation 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 arranged between the fixing plate 411 and the fixing frame 412 . The fixing frame 412 has a body portion 421 and a claw portion 422 extending from the body portion 421 toward the fixing plate 411 . The body portion 421 is provided with a through hole 423 , and the output shaft of the motor 400 extends from the through hole 423 to the fixing frame 412 and is connected to the laminar flow fan 300 . The claw portion 422 is used for fixing with the fixing plate 411 and is matched with the recessed portion 351 . A connecting hole 352 is provided at the center of the recessed portion 351 , and the output shaft of the motor 400 is inserted into the connecting hole 352 and then fixed to the driving disc 305 . The fixing plate 411 is provided with a plate connecting hole 414 , and the claw portion 422 is provided with a claw connecting hole 424 , and the claw portion 422 and the fixing plate 411 are fixed by using a bolt or the like. In addition, the fixing plate 411 is also provided with a reinforcing rib 415 .

In other embodiments, the driving disc 305 of the laminar flow fan 300 has a flat surface, and the motor 400 is fixedly arranged on the flat surface of the driving disc 305 . FIG. 13 is a schematic front view of the laminar flow fan 110 with the drive disc 305 having a flat surface. FIG. 14 is a schematic perspective view of the laminar flow fan 110 shown in FIG. 13 from another perspective. In a preferred embodiment, the lower surface of the driving disk 305 also has 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 to enter between the disks. The gap between them, thereby improving the efficiency of laminar flow formation.

FIG. 15 is a schematic view of the air circulation of the laminar flow fan 110 shown in FIG. 13 . The center of the plurality of annular discs 301 is jointly formed with an air inlet channel 302 to allow the air outside the laminar flow fan 300 to enter; the plurality of annular discs 301 A plurality of discharge ports 303 are formed in the gaps between them, so that the laminar flow can be blown out.

The connecting members 306 of the laminar flow fan 300 may be blades 361, connecting rods 362, and 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 its cross section has two curves arranged in sequence along the rotation direction of the annular disc 301. The length of the chord line 373 of the two curves is linear with the air volume of the laminar flow fan 110. Therefore, by increasing the length of the string 373, the air volume of the laminar flow fan 110 can be greatly improved, thereby promoting the laminar flow air circulation. It should be noted that the two curves can be arcs, non-circular arcs, straight lines, etc. The straight line can be used as a special curve. When the distances between the two end points of the two curves are the same, the length of the chord line 373 may be the distance between the two ends of the two curves. When the distances between the two end points of the two curves are different, if both ends of the two curves do not intersect, the length of the chord line 373 may be the length of the midpoint of the cross section of the blade 361 except for the two curves. Length of the connecting line; if only one end of the two curves intersects, the length of the chord line 373 may be the length of the connecting line between the midpoint of the curves other than the two curves and the intersecting endpoint of the two curves in the cross section of the blade 361 .

In a preferred embodiment, there are a plurality of blades 361 , and the blades 361 are evenly spaced through the driving disk 305 and the plurality of annular disks 301 . The plurality of blades 361 penetrate the driving disc 305 and the plurality of annular discs 301 at an even interval, which can ensure a stable connection between the driving disc 305 and the plurality of annular discs 301, thereby ensuring that when the motor 400 drives the driving disc 305 to rotate , the driving disc 305 can stably drive the plurality of annular discs 301 to rotate, thereby improving the working reliability of the laminar flow fan 110 .

FIG. 17 shows the laminar flow fan 110 shown in FIG. 13 when the outer diameter, inner diameter, number of layers, spacing, thickness, installation angle of the blades 361 and the rotational speed of the motor 400 of the annular disc 301 remain unchanged. Schematic diagram of the relationship between the length of the line 373 and the air volume and wind pressure, the abscissa axis in the figure refers to the length of the chord line 373 of the blade 361, and the wind pressure refers to the pressure difference between the outlet 303 and the inlet of the air inlet channel 302. It should be noted 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 process that the air boundary layer 304 rotates and moves from the inside to the outside to form the laminar flow is centrifugal motion, so the speed when it leaves the discharge port 303 is greater than the speed when it enters the air inlet channel 302 . The pressure difference between the discharge port 303 and the inlet of the air inlet channel 302 is the wind pressure, and the length of the chord 373 is also linearly related to the wind pressure. By increasing the length of the string 373, the wind pressure of the laminar flow fan 110 can also be greatly improved, and the comprehensive performance of the laminar flow fan 110 can be effectively guaranteed.

Considering that the internal space of the air purifier 100 is limited, the overall occupied volume of the laminar flow fan 110 needs to have certain constraints. Specifically, considering that the thickness of the laminar flow fan 110 should not be too large, the number of annular disks 301, the distance between two adjacent annular disks 301, and the thickness of the annular disks 301 can be constrained accordingly; The laterally occupied volume of the laminar flow fan 110 should not be too large, and the outer diameter of the annular disk 301 may be constrained accordingly. For example, the outer diameter of each annular disc 301 can be set to be 170mm to 180mm, and the inner diameter of each annular disc 301 can be set to be 110mm to 120mm, which can effectively increase the air volume and ensure that the air output from the laminar flow fan 110 can meet the needs of the user. need. When the outer and inner diameters of the annular disc 301 are constant, although the longer the chord line 373 is, the greater the air volume and pressure of the laminar flow fan 110 are, but the length of the chord line 373 should be constrained to a certain extent to avoid the blades 361 Excessive penetration of the annular disk 301 leads to a decrease in the stability of the laminar flow fan 110 . All in all, the length of the string 373 can be set to the maximum range that can be achieved, so that the air volume and air pressure of the laminar flow fan 110 can meet the usage requirements 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, the spacing is 13.75mm, the thickness is 2mm, the installation angle of the blade 361 is 25.5°, and the rotational speed of the motor 400 is At 1000rpm, it can be found that after increasing the length of the string 373, both the air volume and the air pressure are greatly improved, and are basically linear. On the premise of ensuring the stability of the laminar flow fan 110 , the length of the string 373 is set to a maximum reachable range of 40 mm to 42 mm. Moreover, when the length of the string 373 is set to 42 mm, the air volume of the laminar flow fan 110 can reach 1741 m ³ /h, and the wind pressure can reach 118.9 Pa, which can fully meet the user's needs.

In some embodiments, the blade 361 may be a double-arc blade 310 , the cross-section of which has double arcs protruding toward the rotation direction of the annular disk 301 , including inner arcs 371 arranged in sequence along the rotation direction of the annular disk 301 . and the back arc 372, 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 the laminar flow fan 110 with double arcuate blades 310 . In a preferred embodiment, the outer diameter of each annular disk 301 is 170 mm to 180 mm, the inner diameter of each annular disk 301 is 110 mm to 120 mm, and the difference between the outer diameter and the inner diameter of the annular disk 301 is about 60 mm, and the inner diameter of each annular disk 301 is about 60 mm. The distance between the two ends of the arc 371 is the same as the distance between the two ends of the back arc 372, and the length of the string 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, Make the two ends of the inner arc 371 and the back arc 372 and the inner circumference and outer circumference of the annular disc 301 have a distance of about 10 mm respectively, and under the premise of ensuring the stability of the laminar flow fan 110, the length of the string 373 is set to The achievable maximum range enables the air volume and air pressure of the laminar flow fan 110 to meet the needs of the user.

19 shows the difference between the installation angle α of the double-arc blade 310 when the outer diameter, inner diameter, number of layers, spacing, thickness, chord length of the double-arc blade 310, and rotational speed of the motor 400 of the annular disk 301 remain unchanged. Schematic diagram of the relationship between air volume and wind pressure, the abscissa axis refers to the installation angle of the double arc blade 310, that is, on the same cross section of the double arc blade 310 and the annular disc 301, the chord between the two ends of the inner arc 371 The angle formed by the line 373 and the connecting line 374 passing through the midpoint of the chord line 373 and the central axis of the annular disk 301 . 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, the spacing is 13.75mm, the thickness is 2mm, the chord length of the double arc blade 310 is 35mm, and the The rotational speed is 1000 rpm. At this time, considering the wind volume and wind pressure, the installation angle α of the double arc blade 310 can be set to -5° to 55°. It should be noted that when the chord line 373 and the connecting line 374 are followed in the rotation direction of the annular disk 301, the installation angle α is a positive number; in the rotating direction of the annular disk 301, the connecting line 374, the chord line 374 and the connecting line 374 are in sequence. At line 373, the installation angle α is a negative number. The installation angle takes into account the air volume and wind pressure of the laminar flow fan 110, effectively guarantees the comprehensive performance of the laminar flow fan 110, and enables the air outlet of the laminar flow fan 110 to meet the user's needs while the wind pressure is large, further improving the user's use. experience.

In other embodiments, the blade 361 may be an aviation blade 320 , and its cross section has double arcs protruding toward the rotation direction of the annular disk 301 , including inner arcs 371 and The back arc 372, and the inner arc 371 and the back arc 372 have different centers and both ends intersect. FIG. 20 is a schematic cross-sectional view of the laminar flow fan 110 with the aviation blades 320 .

FIG. 21 shows the laminar flow fan 110 shown in FIG. 20 , when the outer diameter, inner diameter, number of layers, spacing, thickness, chord length of the aviation blade 320 and the rotational speed of the motor 400 of the annular disk 301 remain unchanged, the aviation blade 320 The schematic diagram of the relationship between the installation angle α and the air volume and wind pressure, the abscissa axis refers to the installation angle of the aviation blade 320, that is, on the same cross section of the aviation blade 320 and the annular disc 301, the two sides of the inner arc 371 or the back arc 372 are The angle formed by the chord line 373 between the end points and the connecting line 374 passing through the midpoint of the chord line 373 and the central axis of the annular disk 301 . 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, the spacing is 13.75mm, the thickness is 2mm, the chord length of the aviation blade 320 is 35mm, and the rotational speed of the motor 400 is 1000 rpm, at this time, considering the comprehensive air volume and wind pressure, the installation angle α of the aviation blade 320 can be set to -50° to 15°. The installation angle takes into account the air volume and wind pressure of the laminar flow fan 110, effectively guarantees the comprehensive performance of the laminar flow fan 110, and enables the air outlet of the laminar flow fan 110 to meet the user's needs while the wind pressure is large, further improving the user's use. experience.

The annular discs 301 of the laminar flow fan 300 can also be arranged in one or more of the following structures: the distance between two adjacent annular discs 301 gradually increases along the direction of air flow in the air inlet channel 302 The inner diameters of the plurality of annular discs 301 gradually decrease along the direction of the airflow in the air inlet channel 302;

In some embodiments, the plurality of annular disks 301 of the laminar flow fan 300 are arranged in parallel and spaced apart from each other, have the same central axis, and the distance between two adjacent annular disks 301 is along the air in the air inlet channel 302 The direction of flow gradually increases. 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. After many experiments, the inventor found that as the distance between two adjacent annular discs 301 gradually increases along the direction of air flowing in the air inlet channel 302, the air volume of the laminar flow fan 110 will be effectively increased, so that the The air outlet of the flow fan 110 meets the usage requirements of the user.

Taking the laminar flow fan 110 arranged in the upper part of the housing 200 as an example, FIG. 24 shows that the outer diameter, inner diameter, quantity, thickness, and rotational speed of the motor 400 of the laminar flow fan 110 shown in FIG. 22 remain unchanged. , a schematic diagram showing the relationship between the gradual change of the pitch of the plurality of annular discs 301 and the air volume and wind pressure, wherein the abscissa axis refers to the variation of the pitch between two adjacent annular discs 301 along the bottom-to-up direction. As shown in FIG. 24 , when the above-mentioned parameters remain unchanged, the gradual change of the distance between every two adjacent annular discs 301 in the plurality of annular discs 301 from bottom to top has a greater impact on the air volume , which has little influence on the wind pressure; when the change in the distance between two adjacent annular discs 301 along the bottom-to-up direction represented by the abscissa axis is a positive number, it means that each of the plurality of annular discs 301 The distance between two adjacent annular discs 301 gradually increases from bottom to top; when the abscissa axis represents the change in the distance between two adjacent annular discs 301 along the direction from bottom to top is a negative number , it is explained that the distance 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 of the distance between every two adjacent annular discs 301 in the plurality of annular discs 301 is -1 mm, 1 mm and 2 mm, the air volume and air pressure of the laminar flow fan 110 are very high. big improvement.

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 . There may be a plurality of connecting rods 362 , which penetrate through the driving disc 305 and the edge portions of the plurality of annular discs 301 at even intervals. A plurality of connecting rods 362 are evenly spaced through the edge portions of the driving disc 305 and the plurality of annular discs 301, which can ensure a stable connection between the driving disc 305 and the plurality of annular discs 301, thereby ensuring that the motor 400 drives the When the disc 305 rotates, the driving disc 305 can stably drive the plurality of annular discs 301 to rotate, thereby improving the working reliability of the laminar flow fan 110 . At the same time, when the connecting member 306 is the connecting rod 362, the rotational speed of the motor 400 is approximately linearly related to the air volume of the laminar flow fan 110. Therefore, in a preferred embodiment, the motor 400 can also be configured such that the rotational speed of the motor 400 is obtained according to the The target air volume of the laminar flow fan 110 is determined. That is, the target air volume of the laminar flow fan 110 may be obtained first, and then the rotational speed of the motor 400 may be determined according to the linear relationship between the target air volume and the rotational speed of the motor 400 . It should be noted that, the target air volume can be obtained through the user's input operation. 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 set as follows 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 relationship between the 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 gradually decrease along the direction in which the air flows in the air inlet channel 302 . Taking the laminar flow fan 300 disposed in the upper part of the housing 200 as an example, FIG. 25 is a schematic cross-sectional view of the laminar flow fan 300 with the inner diameter of the annular disk 301 gradually changing. FIG. 26 shows the laminar flow fan 110 with the laminar flow fan 300 shown in FIG. 25 , when the outer diameter, spacing, number, thickness, and rotational speed of the motor 400 of the annular discs 301 remain unchanged, a plurality of annular discs 301 Schematic diagram of the relationship between inner diameter gradient and air volume and air pressure, wherein the abscissa axis refers to the variation between the inner diameter of each annular disk 301 and the inner diameter of the adjacent annular disk 301 below. As shown in FIG. 26 , when the above-mentioned parameters remain unchanged, the inner diameters of the plurality of annular discs 301 gradually change from bottom to top, which has a great influence on the air volume and little influence on the wind pressure. When the variation between the inner diameter of each annular disc 301 and the inner diameter of the adjacent annular disc 301 shown by the abscissa axis is a positive number, it means that the inner diameters of the plurality of annular discs 301 gradually increase from bottom to top; When the variation between the inner diameter of each annular disk 301 indicated by the coordinate axis and the inner diameter of the adjacent annular disk 301 below is a negative number, it means that the inner diameters of the plurality of annular disks 301 gradually decrease from bottom to top. It can be seen from FIG. 26 that when the inner diameters of the plurality of annular discs 301 gradually decrease from bottom to top, the air volume increases and the wind pressure decreases slightly; when the inner diameters of the plurality of annular discs 301 gradually increase from bottom to top, the wind pressure slightly decreases. There is an increase, and the air volume decreases a lot. 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 spacing is 13.75mm, the number is 8, the thickness is 2mm, and the rotational speed of the motor 400 is 1000rpm. Considering the overall air volume and wind pressure, the variation between the inner diameter of each annular disc 301 and the inner diameter of the adjacent annular disc 301 below can be set to -5mm, that is to say, the inner diameters of the eight annular discs 301 are respectively For: 115mm, 110mm, 105mm, 100mm, 95mm, 90mm, 85mm, 80mm.

In some embodiments, the annular disk 301 of the laminar flow fan 300 is an arc-shaped disk gradually approaching the driving disk 305 from the inner side to the outer side. Taking the laminar flow fan 300 disposed in the upper part of the housing 200 as an example, each annular disc 301 is set as an arc-shaped disc that gradually rises from the inside to the outside and protrudes upwards, so that the outside air enters the laminar flow fan 300 The angle is more in line with the fluid flow, which is more conducive to the entry of external air into the laminar flow fan 300, effectively reducing the loss of air volume, and ensuring that the air outlet of the laminar flow fan 110 meets the user's use requirements. FIG. 27 is a schematic diagram of the central angle θ of the line connecting the inner and outer diameters of the plurality of annular disks 301 on the same longitudinal section passing through the central axis. 28 is a schematic diagram of the relationship between the central angle θ and the air volume and air pressure when the outer diameter, number of layers, spacing, thickness, and rotational speed of the motor 400 of the annular disc 301 remain unchanged. As shown in FIG. 28 , when the above-mentioned parameters remain unchanged, as the central angle θ increases gradually, the air volume first increases and then decreases, while the air pressure slightly increases. In a preferred embodiment, the outer diameter of the annular disc 301 is 175mm, the number of layers is 10, the spacing is 13.75mm, the thickness is 2mm, and the rotational speed of the motor 400 is 1000rpm. At this time, considering the air volume and air pressure, the central angle θ Can be set from 9° to 30°. And 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.

By now, those skilled in the art will recognize that, although various exemplary embodiments of the present invention have been illustrated and described in detail herein, the present invention may still be implemented in accordance with the present disclosure without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. 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

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 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 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 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.

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