WO2022027663A1 - 空气净化器 - Google Patents

空气净化器 Download PDF

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Publication number
WO2022027663A1
WO2022027663A1 PCT/CN2020/107977 CN2020107977W WO2022027663A1 WO 2022027663 A1 WO2022027663 A1 WO 2022027663A1 CN 2020107977 W CN2020107977 W CN 2020107977W WO 2022027663 A1 WO2022027663 A1 WO 2022027663A1
Authority
WO
WIPO (PCT)
Prior art keywords
air inlet
air
inlet surface
blade
guide wall
Prior art date
Application number
PCT/CN2020/107977
Other languages
English (en)
French (fr)
Inventor
唐煜
张营春
Original Assignee
深圳市晨北科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市晨北科技有限公司 filed Critical 深圳市晨北科技有限公司
Priority to PCT/CN2020/107977 priority Critical patent/WO2022027663A1/zh
Priority to US17/616,664 priority patent/US20220333796A1/en
Priority to CN202080001688.9A priority patent/CN114466996A/zh
Publication of WO2022027663A1 publication Critical patent/WO2022027663A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F24F13/085—Grilles, registers or guards including an air filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the present application relates to the technical field of air purification equipment, in particular to an air purifier.
  • Air purifiers refer to home appliances that can absorb, decompose or convert various air pollutants (generally including PM2.5, dust, pollen, odor, formaldehyde and other decoration pollution, bacteria, allergens, etc.), and effectively improve air cleanliness. Products are mainly divided into household, commercial, industrial and building.
  • the air purifier is mainly composed of a motor, a fan, an air filter and other systems. Its working principle is: the motor and fan in the machine circulate the indoor air, and the polluted air passes through the air filter in the machine to remove various pollutants. or adsorption. Due to the continuous circulation of air under the action of the fan, the air purifier has the disadvantage of loud noise or abnormal sound during operation, which makes the user sound uncomfortable, interferes with the user's normal work and life, and affects the user. experience.
  • One of the purposes of the embodiments of the present application is to provide an air purifier, which aims to solve the problem of loud noise or abnormal sound in the operation of the air purifier.
  • an air purifier including a casing, wherein the casing has a filter cavity and a drive cavity arranged at intervals, the filter cavity is provided with a filter screen, and the drive cavity is provided with a wind wheel;
  • the casing is provided with an air inlet hole for outside air to enter the filter screen, and an air inlet structure for the air filtered by the filter screen to enter the drive cavity is arranged between the filter cavity and the drive cavity.
  • the casing is also provided with an air outlet structure for the air in the drive cavity to return to the outside world;
  • the air inlet structure includes a first air inlet surface and a second air inlet surface.
  • the first air inlet surface axially extends into the hollow area of the filter screen and is coaxially arranged with the wind wheel.
  • Two air inlet surfaces extend from the periphery of the first air inlet surface to the port of the filter screen facing the wind wheel; the first air inlet surface and the second air inlet surface are evenly distributed along the circumferential direction There are multiple air inlets.
  • the first air inlet surface is a plane and is perpendicular to the axial direction of the filter screen
  • the first air inlet surface is a curved surface concave in the direction of the wind wheel
  • the first air inlet surface is a curved surface that is outwardly convex away from the direction of the wind wheel.
  • the second air inlet surface is conical, and the diameter of the second air inlet surface gradually increases along the direction away from the first air inlet surface;
  • the second air inlet surface is in a convex arc shape relative to the central axis of the second air inlet surface 42 .
  • the first air inlet surface is a plane and is perpendicular to the axial direction of the filter screen; the second air inlet surface is a conical surface, and the diameter of the second air inlet surface is away from the The direction of the first air inlet surface gradually increases;
  • the inclination angle of the second air inlet surface relative to the inner wall of the filter screen ranges from 15° to 45°; the distance that the first air inlet surface extends axially into the filter screen ranges from 35mm to 65mm.
  • a flow guiding structure is further arranged in the driving cavity, and the flow guiding structure is arranged between the wind wheel and the air outlet structure and is arranged coaxially with the wind wheel;
  • the wheel is a centrifugal wind wheel and has a plurality of first blades in a spiral distribution, and the flow guiding structure has a plurality of second blades in a spiral distribution.
  • the rotation direction of the first vane is opposite to the helical direction of the second vane.
  • the largest outer diameter of each of the first vanes is smaller than the smallest inner diameter of each of the second vanes.
  • the flow guiding structure includes a mounting portion, an inner ring and an outer ring that are coaxially arranged and distributed sequentially from inside to outside, the mounting portion is used for mounting and fixing, and the inner ring and the mounting portion connected, the outer ring is arranged outside the inner ring, and the second blades are distributed between the inner ring and the outer ring.
  • the second blade is arced on the inner ring from an end of the inner ring close to the first blade to an end away from the first blade, in a direction away from the second blade in front of the second blade and the second blade extends in an arc on the outer ring from the end of the outer ring close to the first blade to the end away from the first blade, in a direction away from the second blade in front of the second blade .
  • the second vane extends along an arc from the inner ring to the outer ring.
  • a motor is provided in the driving cavity, the motor is used to drive each of the first blades to rotate, and the rotation direction of the motor is opposite to the helical direction of each of the first blades.
  • the wind wheel includes a mounting bracket and a mounting ring spaced along its axial direction, the top contour of the mounting bracket is adapted to the bottom contour of the mounting portion, and the first blades are connected to each other. between the mounting bracket and the mounting ring.
  • the air outlet structure includes a plurality of connecting bars spirally distributed along the circumferential direction, the helical direction of each connecting bar is the same as that of each second blade, and two adjacent connecting bars are in the same spiral direction as each second blade. Air vents are formed between them.
  • each of the connecting bars is arranged in a convex arc shape.
  • the air outlet structure includes a center plate and an outer ring surrounding the center plate, the center plate is used to install a motor and a flow guide structure, and each of the connecting bars is connected to the between the center plate and the outer ring.
  • the drive cavity is provided with a first guide wall connected between the air inlet structure and the outer ring, and the air passing through the centrifugal wind wheel is concentrated in the centrifugal wind between the wheel and the first guide wall, and guided by the first guide wall to between each of the second vanes.
  • the driving cavity is further provided with a second flow guide wall connected between the outer ring and the outer ring, and a second flow guide wall connected between the inner ring and the center plate With three guide walls, the air flowing between the second blades flows to each of the air outlets from between the second guide wall and the third guide wall.
  • the third guide wall is in the shape of an arc and convex toward the second guide wall, and the diameter of the third guide wall is from the center plate to the inner ring. direction increases gradually.
  • the housing further includes a first sleeve, a second sleeve and a base, the first sleeve and the second sleeve are axially connected, and the first sleeve is sleeved on Outside the first guide wall and the second guide wall, the second sleeve is sleeved outside the filter screen, and the base cover is installed on the second sleeve away from the first sleeve At one end of the cylinder, the second sleeve is covered with the air inlet holes in the circumferential direction.
  • the air inlet structure of the air purifier includes a first air inlet surface and a second air inlet surface, and the first air inlet surface is located in the hollow area of the filter screen and is connected to the wind.
  • the wheels are coaxially arranged, that is, the first air inlet surface is protruded from the drive cavity to the direction of the filter screen, and the second air inlet surface extends from the periphery of the first air inlet surface to the port of the filter screen facing the wind wheel, so that , the sum of the air inlet area of the first air inlet surface and the second air inlet surface is much larger than the air inlet area when the air inlet structure is only horizontally arranged between the filter cavity and the drive cavity, that is, the air inlet area of the air inlet structure of the present application.
  • the air area is increased, thereby reducing the air inlet resistance, that is, in the case of the same air volume, the noise is reduced and the user experience is improved.
  • FIG. 1 is a schematic perspective view of an air purifier provided by an embodiment of the present application.
  • Fig. 2 is the longitudinal sectional schematic diagram of the air purifier in Fig. 1;
  • Fig. 3 is the air flow diagram of the air purifier in Fig. 2;
  • Fig. 4 is a partial enlarged view of the air inlet structure area in Fig. 2;
  • Fig. 5 is the three-dimensional schematic diagram of the air inlet structure in Fig. 2;
  • Fig. 6 is the three-dimensional schematic diagram of the wind wheel in Fig. 2;
  • Fig. 7 is the top view schematic diagram of the wind wheel in Fig. 2;
  • Fig. 8 is the three-dimensional schematic diagram of the diversion structure in Fig. 2;
  • FIG. 9 is a schematic top view of the diversion structure in FIG. 2;
  • Figure 10 is a schematic top view of the air outlet structure in Figure 2;
  • Fig. 11 is the three-dimensional schematic diagram of the air outlet structure in Fig. 2;
  • FIG. 12 is a schematic view of the structure of the third flow guide wall and the installation cylinder in FIG. 2 .
  • the air purifier provided by some embodiments of the present application can be placed in homes, shopping malls and office buildings to achieve the purpose of air purification.
  • the air purifier has low noise and no abnormal sound during use. It will interfere with the normal work and life of the user.
  • the air purifier includes a housing 10, and the housing 10 has a filter cavity 15 and a drive cavity 16 arranged at intervals, the filter cavity 15 is provided with a filter screen 20, and the drive cavity 16 is provided with a wind wheel 30;
  • the housing 10 is provided with an air inlet hole 17 for outside air to enter the filter screen 20, and an air inlet structure 40 for the air filtered by the filter screen 20 to enter the drive chamber 16 is provided between the filter cavity 15 and the drive cavity 16.
  • the housing 10 There is also an air outlet structure 11 for returning the air in the driving cavity 16 to the outside.
  • the housing 10 is cylindrical, the filter cavity 15 and the driving cavity 16 are distributed along the axial direction of the housing 10 , and when the air purifier is erected, the driving cavity 16 is located above the filter cavity 15 .
  • the wind wheel 30 is used to drive the air circulation to make the outside air enter the filter cavity 15, and the filter screen 20 in the filter cavity 15 is used to filter the outside air to achieve the purpose of cleaning and purifying the air, and then the wind wheel 30 drives the purified air.
  • the air enters the driving chamber 16 from the filter chamber 15, and returns to the outside from the driving chamber 16 through the air outlet structure 11, so that the user can breathe fresh air.
  • the air inlet structure 40 includes a first air inlet surface 41 and a second air inlet surface 42 .
  • the first air inlet surface 41 axially extends into the hollow area 21 of the filter screen 20 and is connected to the wind wheel 30 .
  • the second air inlet surface 42 extends from the periphery of the first air inlet surface 41 to the port of the filter screen 20 facing the wind wheel 30 .
  • the first air inlet surface 41 and the second air inlet surface 42 are arranged coaxially.
  • the peripheral edge of the first air inlet surface 41 refers to the edge of the first air inlet surface 41.
  • the first air inlet surface 41 and the second air inlet surface 42 There are multiple air inlets evenly distributed along the circumferential direction.
  • the filter screen 20 is cylindrical, the axial direction of the filter screen 20 is parallel to the axial direction of the housing 10, the center of the filter screen 20 is provided with a hollow area 21, and the air inlet holes 17 are distributed on the housing 10 and surrounded by the filter screen 20.
  • the outer periphery of the net 20 During operation, the outside air enters the filter cavity 15 through the air inlet hole 17, and enters the filter screen 20 through the outer peripheral wall of the filter screen 20 for filtering.
  • the filtered air enters the hollow area 21 and passes through the hollow area 21.
  • the air intake structure 40 flows into the drive cavity 16 .
  • the central axis of the wind rotor 30 , the central axis of the first air inlet surface 41 and the central axis of the filter screen 20 coincide with each other, and the inner diameter of the hollow area 21 of the filter screen 20 is smaller than the maximum outer diameter of the wind wheel 30 , and The maximum diameter of the second air inlet surface 42 is smaller than the inner diameter of the hollow area 21 of the filter screen 20 , so that the air in the hollow area 21 of the filter screen 20 can be driven by the wind wheel 30 to circulate.
  • the air inlet structure 40 includes a first air inlet surface 41 and a second air inlet surface 42 , and the first air inlet surface 41 is located in the hollow area 21 of the filter screen 20 and is coaxial with the wind wheel 30 Setting, that is, the first air inlet surface 41 is protruded from the drive cavity 16 to the direction of the filter screen 20, and the second air inlet surface 42 extends from the periphery of the first air inlet surface 41 to the filter screen 20 toward the wind wheel 30.
  • the sum of the air inlet area of the first air inlet surface 41 and the second air inlet surface 42 is much larger than the air inlet area when the air inlet structure 40 is only horizontally arranged between the filter cavity 15 and the drive cavity 16, that is, It is because the air intake area of the air intake structure 40 of the present application is increased, thereby reducing the air intake resistance, that is, in the case of the same air volume, the noise is reduced and the user experience is improved.
  • the first air inlet surface 41 is a plane, the first air inlet surface 41 is perpendicular to the axial direction of the filter screen 20 , and the first air inlet surface 41 is circular, and the first air inlet surface 41 is circular.
  • the wind surface 41 is coaxial with the wind wheel 30 and arranged at intervals along the axial direction. Most of the air entering the hollow area 21 of the filter screen 20 can enter the drive cavity 16 vertically from the first air inlet surface 41 .
  • the manufacturing difficulty of the air inlet structure 40 can be reduced on the premise of increasing the air inlet area of the entire air inlet structure 40 , the structure is simple, and the cost is low.
  • the above-mentioned first air inlet surface 41 may not be set to be a plane, but a curved surface concave in the direction of the wind wheel 30, or a curved surface.
  • the purpose of increasing the air intake area of the air intake structure 40 and reducing the noise can also be achieved by setting the curved surface away from the direction of the wind wheel 30 and convex, which is not limited here.
  • the second air inlet surface 42 is in the shape of a cone, and the diameter of the second air inlet surface 42 gradually increases along the direction away from the first air inlet surface 41 .
  • Part of the air in the hollow area 21 of the filter screen 20 can enter the drive cavity 16 from between the inner wall of the filter screen 20 and the outer wall of the second air inlet surface 42 and through the second air inlet surface 42 .
  • by slanting the second air inlet surface 42 it is convenient for air to enter the drive cavity 16 from the filter screen 20 , and the air inlet area of the second air inlet surface 42 is increased, thereby making the entire air inlet structure 40 .
  • the air intake area is increased, reducing the air intake noise.
  • the above-mentioned second air inlet surface 42 can also be provided with an arc shape that is convex relative to the central axis of the second air inlet surface 42, which can also be used.
  • the air inlet area of the second air inlet surface 42 is increased to reduce the air inlet noise, which is not uniquely limited here.
  • the maximum diameter L1 of the second air inlet surface 42 is 158 mm
  • the inclination angle a1 of the second air inlet surface 42 relative to the inner wall of the filter screen 20 is 32 degrees
  • the first air inlet surface 41 extends axially into
  • the distance H1 of the filter screen 20 is 53 mm.
  • the maximum diameter of the second air inlet surface 42 can be adjusted according to the inner diameter of the filter screen 20, and the inclination angle of the second air inlet surface 42 can also be adjusted up and down.
  • the inclination angles of the wind surface 42 relative to the inner wall of the filter screen 20 are 15°, 25°, 35°, and 45°, etc., and generally meet the requirements within 15° to 45°.
  • the distance that the first air inlet surface 41 axially extends into the filter screen 20 can also be adjusted up and down, such as 35mm, 45mm, 55mm or 65mm, etc., generally within the range of 35mm to 65mm. .
  • the air intake structure 40 includes a first basic rib 44 , a second basic rib 45 , a third basic rib 46 and a plurality of connecting ribs 47 , a first basic rib 44 , a second basic rib 45 , and a third basic rib 46 are all circular and coaxially arranged, and the radii of the first basic rib 44, the second basic rib 45 and the third basic rib 46 gradually increase.
  • the third foundation ribs 46 are arranged on the second air inlet surface 42 .
  • each connecting ribs 47 are arranged in a divergent shape, and 2N connecting ribs are connected between the first basic rib 44 and the second basic rib 45 Ribs 47, 3N connecting ribs 47 are connected between the second basic rib 45 and the third basic rib 46, and 4N connecting ribs 47 are connected between the third basic rib 46 and the edge of the second air inlet surface 42.
  • the connecting ribs 47 of the adjacent group are all partially connected, and a plurality of air inlets are formed between the connecting ribs 47, and the air passes through the air inlets.
  • the air inlet is sufficiently large in the air-dense position, and the structural strength of the entire air inlet structure 40 is set strong enough in the air-sparse position, and can avoid the use of fingers to stretch. into the wind turbine.
  • the number of the above-mentioned basic ribs and connecting ribs 47 can be appropriately increased or decreased, and the number of connecting ribs 47 between the basic ribs can also not be multiplied. There is no unique limitation here.
  • the air intake structure 40 further includes a mounting frame 43 .
  • the mounting frame 43 is annularly disposed on the edge of one end of the second air inlet surface 42 away from the first air inlet surface 41 and integrally connected with the second air inlet surface 42 .
  • the installation frame 43 is arranged above one end of the filter screen 20 and forms a fixed connection with the housing 10 , so that the air intake structure 40 is installed on the housing 10 , and the housing 10 is divided into the filter cavity 15 and the drive cavity 16 .
  • the mounting frame 43 also has the function of supporting the first flow guide wall 70 , which will be described below on the position of the first flow guide wall 70 .
  • the driving cavity 16 is further provided with a flow guide structure 50 , the flow guide structure 50 is fixedly arranged relative to the casing 10 , and the flow guide structure 50 is arranged between the wind wheel 30 and the wind wheel 30 .
  • the air outlet structures 11 are arranged coaxially with the wind wheel 30, and the guide structure 50 is used to guide the air driven by the wind wheel 30 to the air outlet structure 11;
  • the wind wheel 30 is a centrifugal wind wheel 30, and the centrifugal wind wheel 30 can
  • the air is driven in the centrifugal direction
  • the centrifugal wind wheel 30 has a plurality of first blades 33 in a spiral distribution
  • the guide structure 50 has a plurality of second blades 54 in a spiral distribution
  • the rotation direction of the first blades 33 is the same as that of the second blades
  • the spiral direction of 54 is opposite, that is, when the first blade 33 rotates clockwise, the second blade 54 is spirally distributed in a counterclockwise direction, and when the first blade 33 rotates counterclockwise, the second blade 54 is spirally distributed in a clockwise direction.
  • the first blade 33 rotates clockwise
  • the second blade 54 is spirally distributed in a counterclockwise direction
  • the air is centrifugally distributed on the periphery of the first blade 33 under the action of the rotating first blade 33, because the second blade 54 Contrary to the rotation direction of the first blade 33, the peripheral local wind speed is reduced, so that the overall wind speed is relatively balanced, and the friction sound between the air and the second blade 54 caused by the high wind speed is reduced.
  • the maximum outer diameter D1 of each first blade 33 is smaller than the minimum inner diameter D2 of each second blade 54 .
  • the maximum outer diameter D1 of each first blade 33 refers to the diameter of the circle at the outermost edge of each first blade 33 after helical distribution; and the minimum inner diameter D2 of each second blade 54 refers to each second blade 54 The diameter of the innermost edge when distributed along the helix.
  • the diversion structure 50 includes a mounting portion 51 , an inner ring 52 , an outer ring 53 and each second vane 54 , the mounting portion 51 , the inner ring 52 , the outer The rings 53 are coaxially arranged and distributed in sequence from the inside to the outside.
  • the mounting portion 51 is used for mounting and fixing, the inner ring 52 is connected to the mounting portion 51 , the outer ring 53 is arranged outside the inner ring 52 , and the second blades 54 are distributed on the inner ring 52 and the outer ring 53 , that is, each second blade 54 is connected between the inner ring 52 and the outer ring 53 respectively, so that the second blade 54 is limited above the first blade 33 by the inner ring 52 and the outer ring 53 the outer periphery, so as to realize the guiding effect of the second blade 54 on the air.
  • each of the second vanes 54 is spirally distributed in a counterclockwise direction, and the second vane 54b is located in front of the second vane 54a along the spiral direction.
  • the second vane 54a on the inner ring 52 extends from the end of the inner ring 52 close to the first vane 33 to the end away from the first vane 33 along an arc in the direction away from the second vane 54b in front of it.
  • the second vane 54a extends in an arc on the outer ring 53 from the end of the outer ring 53 close to the first blade 33 to the end away from the first blade 33 in a direction away from the second blade 54b in front of the outer ring 53.
  • the extension arc of the second blade 54a is M1
  • the extension arc M1 extends from the bottom end to the top end of the second blade 54a in the direction of the arc away from the second blade 54b, so that the second blade 54a has a vertical
  • the split direction and the split direction pointing to the center when the centrifugally driven air through the first vane 33 enters the second vane 54, it will partially contact the front of the second vane 54, so that the second vane 54 can reverse this part of the air and It guides and divides the flow in the direction of the center, so that the peripheral high-speed air flow is dispersed to the center, so that the components between the center and the edge are more uniform, and the edge wind speed can be reduced.
  • the second blade 54 extends from the inner ring 52 to the outer ring 53 along an arc. Specifically, the radius of the arc is 120 mm. By extending the second blade 54 along the arc, the surface of the second blade 54 is More balanced and soft, the second blade 54 exerts a softer force on the air, thereby reducing the frictional force between the second blade 54 and the air and reducing noise.
  • a motor 60 is arranged in the driving cavity 16 , and the motor 60 is used to drive each first blade 33 to rotate.
  • the rotation direction of the motor 60 is opposite to the spiral direction of each first blade 33 , and That is, the centrifugal wind wheel 30 is a backward centrifugal wind wheel 30, and the backward centrifugal wind wheel has the advantages of small vibration and low noise, so that the air purifier of the present application has low noise during use.
  • the wind rotor 30 includes a mounting frame 31 and a mounting ring 32 , the mounting frame 31 and the mounting ring 32 are arranged at intervals along the axial direction of the wind rotor 30 , and the mounting frame 31 is mounted on the rotating shaft of the motor 60 .
  • the motor 60 drives the mounting frame 31 to rotate the entire rotor 30 , the top contour of the mounting frame 31 matches the bottom contour of the mounting portion 51 , and each first blade 33 is connected between the mounting frame 31 and the mounting ring 32 .
  • the mounting portion 51 is bowl-shaped and protrudes outward in the direction of the mounting frame 31.
  • the mounting frame 31 matches the shape of the mounting portion 51.
  • the part 51 is always arranged to fit up and down. In addition, due to the convex arrangement of the mounting portion 51, a lot of space is reserved above the mounting portion 51, which facilitates the installation of the motor 60 and other structures, thereby making the entire air purifier compact and compact in structure.
  • the air outlet structure 11 includes a plurality of connecting bars 111 spirally distributed along the circumferential direction. The directions are the same, and an air outlet 112 is formed between two adjacent connecting bars 111 .
  • the air guided by the second blade 54 can flow out from each air outlet 112 better, reducing the air outlet resistance and improving the Air outlet efficiency and noise reduction.
  • each connecting bar 111 is arranged in an outwardly convex arc shape, which increases the length of the connecting bar 111 , thereby increasing the total area of each air outlet 112 .
  • Q air volume
  • V the wind speed
  • A the cross-sectional area. That is to say, in the case of a certain wind speed, increasing the air outlet area can increase the air volume.
  • the larger the air outlet area the smaller the air outlet resistance, and the smoother the air flow.
  • the average wind speed passing through the air outlet structure 11 is smaller, and the smaller the wind speed, the greater the force of the air impacting the connecting bar 111. small, which reduces noise.
  • each connecting bar 111 is in the shape of a semi-circular arch, so that the total area of each air outlet 112 is 25% larger than the air outlet area of the planar air outlet structure 11 , thereby reducing noise. the goal of.
  • the air outlet structure 11 includes a center plate 113 and an outer ring 114 .
  • the center plate 113 is in the shape of a circular plate and is located at the top center of the entire casing 10 .
  • the center plate 113 is used for installing the motor 60 and
  • the guide structure 50 that is, the motor 60 and the guide structure 50 are directly or indirectly mounted on the center plate 113 .
  • the outer ring 114 is arranged around the center plate 113 , the outer ring 114 is used for connecting with other parts of the housing 10 , and the connecting bars 111 are respectively connected between the center plate 113 and the outer ring 114 .
  • the air outlet structure 11 is connected between the outer ring 114 and the center plate 113 through the connecting bars 111, so that each air outlet 112 just corresponds to the position of each second blade 54, which improves the air outlet efficiency of the air outlet 112, and simultaneously realizes
  • the connection between the air outlet structure 11 and other parts of the casing 10 is completed, and the position of the center plate 113 is reserved to realize the installation of the motor 60 , the guide structure 50 and the wind wheel 30 .
  • the driving cavity 16 is provided with a first guide wall 70 , and the first guide wall 70 is connected between the air inlet structure 40 and the outer ring 53 .
  • the first guide wall 70 is The flow wall 70 is connected between the installation frame 43 and the outer ring 53, and the installation frame 43 has a supporting effect on the first guide wall 70, so that the air passing through the centrifugal fan 30 is concentrated in the centrifugal fan 30 and the first guide wall. between the flow walls 70 and guided by the first guide walls 70 to between the second vanes 54 .
  • the first guide wall 70 is slightly inclined, and the arc treatment is performed at the position corresponding to the lower end of the first blade 33, which is not only conducive to the fixed connection between the first guide wall 70 and the mounting frame 43, but also has a buffer for the air.
  • the driving cavity 16 is further provided with a second guide wall 80 and a third guide wall 90 , the second guide wall 80 is connected between the outer ring 53 and the outer ring 114 , and the third guide wall 90 Connected between the inner ring 52 and the center plate 113, the second guide wall 80 and the third guide wall 90 are both revolving bodies and are coaxially arranged, and the air flowing between the second vanes 54 flows from the second guide wall. 80 and the third guide wall 90 flow to each air outlet 112, in this way, through the arrangement of the second guide wall 80 and the third guide wall 90, the air passing through each second blade 54 can be guided to the air outlet 112, the air outlet efficiency is improved.
  • the third guide wall 90 has an arc-shaped convex shape toward the direction of the second guide wall 80 , and the diameter of the third guide wall 90 gradually increases from the center plate 113 to the direction of the inner ring 52 .
  • the air flowing out from each second vane 54 flows to the air outlet 112 more smoothly, reducing friction noise.
  • the center of the third guide wall 90 is provided with an installation cylinder 100 , the installation cylinder 100 is recessed in the center of the third guide wall 90 , and the installation cylinder 100 is fixedly connected to the center plate 113 .
  • the third deflector wall 90 , the mounting cylinder 100 , the inner ring 52 and the mounting portion 51 enclose a mounting cavity, the motor 60 is installed in the mounting cavity, and the mounting cylinder 100 is provided with a mounting seat on which the motor 60 is mounted , the mounting portion 51 is also fixedly connected with the mounting seat.
  • the housing 10 further includes a first sleeve 12 , a second sleeve 13 and a base 14 , the first sleeve 12 and the second sleeve 13 are axially flush Connection, the first sleeve 12 is sleeved outside the first guide wall 70 and the second guide wall 80, the outer ring 114 is connected with the end of the first sleeve 12 away from the second sleeve 13, the second sleeve 13 sleeves
  • the base 14 is disposed outside the filter screen 20, the base 14 is covered on the end of the second sleeve 13 away from the first sleeve 12, the base 14 is disposed on the end of the filter screen 20 away from the wind wheel 30, and the second sleeve 13 is along the circumferential direction. Filled with air inlet holes 17.

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Abstract

一种空气净化器，包括外壳（10），外壳（10）内具有过滤腔（15）及驱动腔（16），过滤腔（15）内设有过滤网（20），驱动腔（16）内设有风轮（30）；外壳（10）上设有进风孔（17）及出风结构（11），过滤腔（15）与驱动腔（16）之间设有进风结构（40）；进风结构（40）包括第一进风面（41）和第二进风面（42），第一进风面（41）轴向伸入过滤网（20）的中空区域（21）中并与风轮（31）同轴设置，第二进风面（42）自第一进风面（41）的周缘延伸至过滤网（20）朝向风轮（30）的端口。第一进风面（41）和第二进风面（42）的进风面积总和增大了，减小了进风阻力，减少了噪音。

Description

空气净化器 技术领域
本申请涉及空气净化设备技术领域，具体涉及一种空气净化器。
 背景技术
空气净化器是指能够吸附、分解或转化各种空气污染物（一般包括PM2.5、粉尘、花粉、异味、甲醛之类的装修污染、细菌、过敏原等），有效提高空气清洁度的家电产品，主要分为家用、商用、工业及楼宇。
空气净化器主要由马达、风扇、空气过滤网等系统组成，其工作原理为：机器内的马达和风扇使室内空气循环流动，污染的空气通过机内的空气过滤网后将各种污染物清除或吸附。由于空气在风扇的作用下不断循环流动，导致该空气净化器在工作的过程中存在噪音大或有异音的缺点，让用户听起来很不舒服，干扰了用户的正常工作及生活，影响用户体验。
 技术问题
本申请实施例的目的之一在于：提供一种空气净化器，旨在解决空气净化器工作中存在噪音大或有异音的问题。
 技术解决方案
为解决上述技术问题，本申请实施例采用的技术方案是：
第一方面，提供了一种空气净化器，包括外壳，所述外壳内具有间隔设置的过滤腔及驱动腔，所述过滤腔内设有过滤网，所述驱动腔内设有风轮；所述外壳上设有供外界空气进入所述过滤网的进风孔，所述过滤腔与所述驱动腔之间设有供经过所述过滤网过滤后的空气进入所述驱动腔的进风结构，所述外壳上还设有供驱动腔内的空气回到外界的出风结构；
所述进风结构包括第一进风面和第二进风面，所述第一进风面轴向伸入所述过滤网的中空区域中并与所述风轮同轴设置，所述第二进风面自所述第一进风面的周缘延伸至所述过滤网朝向所述风轮的端口；所述第一进风面和所述第二进风面上均沿周向均匀分布有多个进风口。
在一个实施例中，所述第一进风面为平面并与所述过滤网的轴向垂直；
或者，所述第一进风面呈向所述风轮方向内凹的曲面；
或者，所述第一进风面呈背离所述风轮方向外凸的曲面。
在一个实施例中，所述第二进风面呈圆锥状，且所述第二进风面的口径沿背离所述第一进风面的方向逐渐增大；
或者，所述第二进风面相对所述第二进风面42的中心轴呈外凸的圆弧状。
在一个实施例中，所述第一进风面为平面并与所述过滤网的轴向垂直；所述第二进风面呈圆锥面，且所述第二进风面的口径沿背离所述第一进风面的方向逐渐增大；
其中，所述第二进风面相对所述过滤网内壁的倾斜角度范围为15 °～45°；所述第一进风面轴向伸入所述过滤网的距离范围为35mm～65mm。
在一个实施例中，所述驱动腔内还设有导流结构，所述导流结构设于所述风轮与所述出风结构之间并与所述风轮同轴设置；所述风轮为离心风轮并具有呈螺旋分布的多个第一叶片，所述导流结构具有呈螺旋分布的多个第二叶片。
在一个实施例中，所述第一叶片的旋转方向与所述第二叶片的螺旋方向相反。
在一个实施例中，各所述第一叶片的最大外径小于各所述第二叶片的最小内径。
在一个实施例中，所述导流结构包括同轴设置且由内到外依次分布的安装部、内圈及外圈，所述安装部用于安装固定，所述内圈与所述安装部连接，所述外圈围设于所述内圈外，所述第二叶片分布于所述内圈与所述外圈之间。
在一个实施例中，所述第二叶片在所述内圈上自所述内圈靠近所述第一叶片的一端向背离所述第一叶片的一端，沿背离其前方第二叶片的方向弧线延伸；且所述第二叶片在所述外圈上自所述外圈靠近所述第一叶片的一端向背离所述第一叶片的一端，沿背离其前方第二叶片的方向弧线延伸。
在一个实施例中，所述第二叶片自所述内圈向所述外圈沿弧线延伸。
在一个实施例中，所述驱动腔内设有电机，所述电机用于驱动各所述第一叶片旋转，所述电机的旋转方向与各所述第一叶片的螺旋方向相反。
在一个实施例中，所述风轮包括沿其轴向间隔设置的安装架及安装环，所述安装架的顶部轮廓与所述安装部的底部轮廓相适配，各所述第一叶片连接于所述安装架与所述安装环之间。
在一个实施例中，所述出风结构包括多根沿周向螺旋分布的连接条，各所述连接条的螺旋方向与各所述第二叶片的螺旋方向相同，相邻两所述连接条之间形成出风口。
在一个实施例中，各所述连接条呈外凸的弧形设置。
在一个实施例中，所述出风结构包括中心板及围设于所述中心板外的外环，所述中心板用于安装电机及导流结构，各所述连接条分别连接于所述中心板与所述外环之间。
在一个实施例中，所述驱动腔内设有连接于所述进风结构与所述外圈之间的第一导流壁，经过所述离心风轮的空气均离心集中在所述离心风轮与所述第一导流壁之间，并由所述第一导流壁引导至各所述第二叶片之间。
在一个实施例中，所述驱动腔中还设有连接于所述外圈与所述外环之间的第二导流壁，以及连接于所述内圈与所述中心板之间的第三导流壁，流经所述第二叶片之间的空气从所述第二导流壁与所述第三导流壁之间流向各所述出风口。
在一个实施例中，所述第三导流壁呈向所述第二导流壁方向弧形外凸的形状，且所述第三导流壁的口径从所述中心板向所述内圈方向逐渐增大。
在一个实施例中，所述外壳还包括第一套筒、第二套筒及底座，所述第一套筒与所述第二套筒沿轴向连接，所述第一套筒套设于所述第一导流壁及所述第二导流壁外，所述第二套筒套设于所述过滤网外，所述底座盖设于所述第二套筒背离所述第一套筒的一端，所述第二套筒沿周向布满所述进风孔。
 有益效果
本申请实施例提供的空气净化器的有益效果在于：该空气净化器的进风结构包括第一进风面和第二进风面，第一进风面位于过滤网的中空区域中并与风轮同轴设置，也即是将第一进风面由驱动腔向过滤网方向凸出设置，且第二进风面由第一进风面的周缘延伸至过滤网朝向风轮的端口，这样，第一进风面与第二进风面的进风面积总和远大于当进风结构仅仅水平设置在过滤腔与驱动腔之间的进风面积，也即是本申请的进风结构的进风面积增加了，从而减小了进风阻力，也即是在同等风量的情况下，减少了噪音，提高了用户体验。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1是本申请一实施例提供的空气净化器的立体示意图；
图2是图1中空气净化器的纵向剖视示意图；
图3是图2中空气净化器的空气流向图；
图4是图2中进风结构区域的局部放大图；
图5是图2中进风结构的立体示意图；
图6是图2中风轮的立体示意图；
图7是图2中风轮的俯视示意图；
图8是图2中导流结构的立体示意图；
图9是图2中导流结构的俯视示意图；
图10是图2中出风结构的俯视示意图；
图11是图2中出风结构的立体示意图；
图12是图2中第三导流壁和安装筒的结构示意图。
其中，图中各附图标记：
10、外壳；11、出风结构；111、连接条；112、出风口；113、中心板；114、外环；12、第一套筒；13、第二套筒；14、底座；15、过滤腔；16、驱动腔；17、进风孔；20、过滤网；21、中空区域；30、风轮；31、安装架；32、安装环；33、第一叶片；40、进风结构；41、第一进风面；42、第二进风面；43、安装边框；44、第一基础筋；45、第二基础筋；46、第三基础筋；47、连接筋；50、导流结构；51、安装部；52、内圈；53、外圈；54、第二叶片；60、电机；70、第一导流壁；80、第二导流壁；90、第三导流壁；100、安装筒。
 本发明的实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本申请。
需说明的是，当部件被称为“固定于”或“设置于”另一个部件，它可以直接在另一个部件上或者间接在该另一个部件上。当一个部件被称为是“连接于”另一个部件，它可以是直接或者间接连接至该另一个部件上。术语“上”、“下”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。术语“第一”、“第二”仅用于便于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明技术特征的数量。“多个”的含义是两个或两个以上，除非另有明确具体的限定。
为了说明本申请所述的技术方案，以下结合具体附图及实施例进行详细说明。
本申请一些实施例提供的空气净化器，其可摆放于家中、商场中及写字楼中以达到空气净化的目的，此外，该供气净化器在使用过程中，噪音小且无异音，不会干扰用户的正常工作和生活。
请参阅图1及图2，空气净化器包括外壳10，外壳10内具有间隔设置的过滤腔15及驱动腔16，过滤腔15内设有过滤网20，驱动腔16内设有风轮30；外壳10上设有供外界空气进入过滤网20的进风孔17，过滤腔15与驱动腔16之间设有供经过过滤网20过滤后的空气进入驱动腔16的进风结构40，外壳10上还设有供驱动腔16内的空气回到外界的出风结构11。
外壳10呈圆筒状，过滤腔15与驱动腔16沿外壳10的轴向分布，且当该空气净化器竖立时，驱动腔16位于过滤腔15的上方。风轮30用于驱动空气循环以使外界空气进入过滤腔15中，过滤腔15中的过滤网20用于将外界空气进行过滤以达到清洁、净化空气的目的，然后风轮30驱动净化后的空气从过滤腔15进入驱动腔16，并从驱动腔16经由出风结构11回到外界，以使用户呼吸到清新空气。
请参阅图2及图3，进风结构40包括第一进风面41和第二进风面42，第一进风面41轴向伸入过滤网20的中空区域21中并与风轮30同轴设置，第二进风面42自第一进风面41的周缘延伸至过滤网20朝向风轮30的端口。第一进风面41和第二进风面42同轴设置，第一进风面41的周缘是指第一进风面41一周的边缘，第一进风面41和第二进风面42上均沿周向均匀分布有多个进风口。
具体的，过滤网20呈圆筒状，过滤网20的轴向与外壳10的轴向平行，过滤网20的中心设有中空区域21，进风孔17分布于外壳10上并围设于过滤网20的外周。工作时，外界空气经由进风孔17进入过滤腔15中，并经由过滤网20的外周壁进入过滤网20中以进行过滤，过滤后的空气均进入中空区域21中，并从中空区域21经由进风结构40流向驱动腔16中。
请参阅图2，风轮30的中心轴线、第一进风面41的中心轴线及过滤网20的中心轴线相互重合，过滤网20的中空区域21的内径小于风轮30的最大外径，且第二进风面42的最大口径小于过滤网20的中空区域21的内径，这样，使得过滤网20的中空区域21内的空气能够被风轮30带动而循环流动。
本申请提供的空气净化器，其进风结构40包括第一进风面41和第二进风面42，第一进风面41位于过滤网20的中空区域21中并与风轮30同轴设置，也即是将第一进风面41由驱动腔16向过滤网20方向凸出设置，且第二进风面42由第一进风面41的周缘延伸至过滤网20朝向风轮30的端口，这样，第一进风面41与第二进风面42的进风面积总和远大于当进风结构40仅仅水平设置在过滤腔15与驱动腔16之间的进风面积，也即是本申请的进风结构40的进风面积增加了，从而减小了进风阻力，也即是在同等风量的情况下，减少了噪音，提高了用户体验。
在具体的实施例中，请参阅图2，第一进风面41为平面，第一进风面41与过滤网20的轴向垂直，且第一进风面41呈圆形，第一进风面41与风轮30同轴并沿轴向间隔设置，进入过滤网20的中空区域21的空气大部分能够从第一进风面41垂直进入驱动腔16中。本申请通过将第一进风面41呈平面设置，能够在使得整个进风结构40的进风面积增加的前提下，降低进风结构40的制作难度，结构简单，且成本低。可以理解地，在本申请的其他实施例中，根据实际设计及具体要求，上述第一进风面41也可以不设置呈平面，而是设置成向风轮30方向内凹的曲面，或者是设置成背离风轮30方向外凸的曲面，同样能够达到增加进风结构40的进风面积，减小噪音的目的，此处不做唯一限定。
在具体的实施例中，请参阅图2至图5，第二进风面42呈圆锥状，且第二进风面42的口径沿背离第一进风面41的方向逐渐增大，这样，使得过滤网20的中空区域21中的部分空气能够从过滤网20的内壁与第二进风面42的外壁之间并经由第二进风面42进入驱动腔16中。本申请通过将第二进风面42倾斜设置，从而便于空气从过滤网20中进入驱动腔16中，且第二进风面42的进风面积增大了，进而使得整个进风结构40的进风面积增大了，减小了进风噪音。可以理解地，在本申请的其他实施例中，根据实际设计及具体要求，上述第二进风面42也可以设置相对第二进风面42的中心轴呈外凸的圆弧状，同样能够增大第二进风面42的进风面积，减小进风噪音，此处不做唯一限定。
具体的，请参阅图4，第二进风面42的最大口径L1为158mm，第二进风面42相对过滤网20内壁的倾斜角度a1为32度，第一进风面41轴向伸入过滤网20的距离H1为53mm，通过上述结构的设计，使得本申请的进风结构40的进风面积比进风结构40仅仅水平设置的进风面积增大60%，且是在相同数量的连接筋47的情况下。进风面积越大，进风阻力越小，空气流动更顺畅，在同等同量情况下，通过进风结构40的平均风速就越小，风速越小，空气冲击摩擦进风结构40的力就越小，所以就降低了噪音。可以理解地，在本申请的其他实施例中，第二进风面42的最大口径可以根据过滤网20的内径进行调整，第二进风面42的倾斜角度也可以上下调整，例如第二进风面42相对过滤网20内壁的倾斜角度为15 °、25 °、35 °及45 °等，一般在15 °～45°内均符合要求。同样的，第一进风面41轴向伸入过滤网20的距离也可以上下调整，例如35mm、45mm、55mm或65mm等，一般在35mm～65mm范围内均符合要求，此处不做唯一限定。
请参阅图5，进风结构40包括第一基础筋44、第二基础筋45、第三基础筋46以及多根连接筋47，第一基础筋44、第二基础筋45、第三基础筋46均呈圆形且同轴设置，第一基础筋44、第二基础筋45及第三基础筋46的半径逐渐增大，其中，第一基础筋44及第二基础筋45均设于第一进风面41上，第三基础筋46设于第二进风面42上。从第一基础筋44的中心到第一基础筋44上分布有N个连接筋47，各连接筋47呈发散状设置，第一基础筋44与第二基础筋45之间连接有2N个连接筋47，第二基础筋45与第三基础筋46之间连接有3N个连接筋47，第三基础筋46与第二进风面42的边缘之间连接有4N个连接筋47，且相邻组的连接筋47均有部分相连设置，各连接筋47之间形成了多个进风口，空气从进风口处穿过。本申请通过上述发散状连接筋47的设置，使得在空气密集的位置进风口足够大，而在空气稀疏的位置将整个进风结构40的结构强度设置得足够强，且能够避免用于手指伸入风轮内部。可以理解地，在本申请的其他实施例中，根据实际设计需求，上述基础筋及连接筋47的数量可以适当增减，且各个基础筋之间的连接筋47的数量也可以不成倍数增长，此处不做唯一限定。
请参阅图2及图5，进风结构40还包括安装边框43，安装边框43环设于第二进风面42背离第一进风面41的一端边缘并与第二进风面42一体连接，安装边框43设于过滤网20的一端上方并与外壳10形成固定连接，从而将进风结构40安装于外壳10上，并将外壳10分隔成过滤腔15和驱动腔16。此外，安装边框43还具有支撑第一导流壁70的作用，下文在第一导流壁70的位置会说明。
在具体的实施例中，请参阅图2及图6至图9，驱动腔16内还设有导流结构50，导流结构50相对外壳10固定设置，导流结构50设于风轮30与出风结构11之间并与风轮30同轴设置，导流结构50用于将风轮30驱动的空气引导至出风结构11；风轮30为离心风轮30，离心风轮30能够将空气沿离心方向驱动，离心风轮30具有呈螺旋分布的多个第一叶片33，导流结构50具有呈螺旋分布的多个第二叶片54，且第一叶片33的旋转方向与第二叶片54的螺旋方向相反，也即是当第一叶片33沿顺时针旋转时，第二叶片54沿逆时针螺旋分布，当第一叶片33沿逆时针旋转时，第二叶片54沿顺时针螺旋分布。在本申请中，第一叶片33沿顺时针旋转，第二叶片54沿逆时针螺旋分布，空气在旋转的第一叶片33的作用下离心分布在第一叶片33的外围，由于第二叶片54与第一叶片33旋转方向相反，降低了外围局部风速，使得整体风速比较均衡，降低了因高风速导致空气与第二叶片54之间的摩擦声。
在具体的实施例中，请参阅图2、图7及图9，各第一叶片33的最大外径D1小于各第二叶片54的最小内径D2。具体的，各第一叶片33的最大外径D1是指各第一叶片33沿螺旋分布后，最外边缘的圆的直径；而各第二叶片54的最小内径D2是指各第二叶片54沿螺旋分布后，最内边缘的直径。当各第一叶片33的最大外径D1小于各第二叶片54的最小内径D2时，经由第一叶片33离心驱动的空气将刚好能够被第二叶片54引导分流，从而提高了第二叶片54引导分流的效率。
在具体的实施例中，请参阅图2、图8及图9，导流结构50包括安装部51、内圈52、外圈53及各第二叶片54，安装部51、内圈52、外圈53同轴设置且由内到外依次分布，安装部51用于安装固定，内圈52与安装部51连接，外圈53围设于内圈52外，第二叶片54分布于内圈52与外圈53之间，也即是各第二叶片54分别连接于内圈52与外圈53之间，这样通过内圈52与外圈53将第二叶片54限定在第一叶片33的上方外围，从而实现第二叶片54对空气的引导作用。
请参阅图8及图9，各第二叶片54沿逆时针方向螺旋分布，则沿螺旋方向上，第二叶片54b位于第二叶片54a的前方。则第二叶片54a在内圈52上自内圈52靠近第一叶片33的一端向背离第一叶片33的一端，沿背离其前方第二叶片54b的方向弧线延伸，同样的，第二叶片54a在外圈53上自外圈53靠近第一叶片33的一端向背离第一叶片33的一端，沿背离其前方第二叶片54b的方向弧线延伸。具体地，第二叶片54a的延伸弧线为M1，延伸弧线M1从第二叶片54a的底端向顶端沿背离第二叶片54b的弧线方向延伸，这样，使得第二叶片54a具有竖直分向和指向中心的分向，当经由第一叶片33离心驱动的空气进入第二叶片54后，将会部分与第二叶片54正面接触，这样第二叶片54能够将这部分空气反向并向中心方向引导分流，使外围高速空气流向中心分散一部分，使得中心与边沿的分量更加均匀，能够降低边沿风速。
请参阅图9，第二叶片54自内圈52向外圈53沿弧线延伸，具体的，该弧线半径为120mm，通过将第二叶片54沿弧线延伸，使得第二叶片54的表面更加均衡柔和，第二叶片54对空气的作用力更加柔和，从而减小第二叶片54与空气之间的摩擦力，减低噪音。
在具体的实施例中，请参阅图2，驱动腔16内设有电机60，电机60用于驱动各第一叶片33旋转，电机60的旋转方向与各第一叶片33的螺旋方向相反，也即是该离心风轮30为后向离心风轮30，后向离心风轮具有振动小、噪音低等优势，从而使得本申请的空气净化器在使用过程中噪音小。
请参阅图2、图6及图7，风轮30包括安装架31及安装环32，安装架31及安装环32沿风轮30的轴向间隔设置，安装架31安装在电机60的旋转轴上，电机60带动安装架31从而带动整个风轮30旋转，安装架31的顶部轮廓与安装部51的底部轮廓相适配，各第一叶片33连接于安装架31与安装环32之间。具体的，安装部51呈碗状并向安装架31方向外凸设置，安装架31与安装部51的形状相适配，安装架31活动设置，安装部51固定设置，且安装架31与安装部51始终上下配合设置。此外，通过安装部51外凸的设置，使得安装部51的上方预留不少空间，从而便于电机60及其他结构的安装，进而使得整个空气净化器结构布局紧凑，结构小巧。
在具体的实施例中，请参阅图2、图10及图11，出风结构11包括多根沿周向螺旋分布的连接条111，各连接条111的螺旋方向与各第二叶片54的螺旋方向相同，相邻两连接条111之间形成出风口112。本申请通过将连接条111的螺旋方向与第二叶片54的螺旋方向设置成相同，则经由第二叶片54引导的空气能够更好的从各出风口112处流出，减小出风阻力，提高出风效率，减低噪音。
请参阅图2及图11，各连接条111呈外凸的弧形设置，则增加了连接条111的长度，进而增加了各出风口112的总面积。由于风量（Q）的计算公式是：Q=VA，其中V代表风速，A代表截面积。也即是在风速一定的情况下，增加出风面积可以增加出风量。此外，出风面积越大，出风阻力越小，空气流动更加顺畅，在同等风量情况下，通过出风结构11的平均风速就越小，风速越小，空气冲击连接条111的力就越小，从而降低了噪音。
具体的，请参阅图2，各连接条111的纵向截面呈半圆拱形，这样，各出风口112的总面积比平面形的出风结构11的出风面积多25%，从而达到减小噪音的目的。
请参阅图2、图10及图11，出风结构11包括中心板113及外环114，中心板113呈圆板状并位于整个外壳10的顶部中心位置，中心板113用于安装电机60及导流结构50，也即是电机60和导流结构50均直接或间接安装于中心板113上。外环114围设于中心板113外，外环114用于与外壳10的其他部位连接，各连接条111分别连接于中心板113与外环114之间。该出风结构11通过连接条111连接于外环114与中心板113之间，则各出风口112刚好与各第二叶片54的位置相对应，提高了出风口112的出风效率，同时实现了出风结构11与外壳10其他部位的连接，并且预留了中心板113的位置，以实现电机60、导流结构50及风轮30的安装。
在具体的实施例中，请参阅图2，驱动腔16内设有第一导流壁70，第一导流壁70连接于进风结构40与外圈53之间，具体的，第一导流壁70连接于安装边框43与外圈53之间，安装边框43对第一导流壁70具有支撑作用，这样，经过离心风轮30的空气均离心集中在离心风轮30与第一导流壁70之间，并由第一导流壁70引导至各第二叶片54之间。第一导流壁70略微倾斜设置，且在对应第一叶片33下端的位置做弧形处理，这样不仅利于第一导流壁70与安装边框43之间的固定连接，同时也对空气具有缓冲的作用，减小摩擦，减低噪音。
请参阅图2，驱动腔16中还设有第二导流壁80和第三导流壁90，第二导流壁80连接于外圈53与外环114之间，第三导流壁90连接于内圈52与中心板113之间，第二导流壁80与第三导流壁90均为回转体且同轴设置，流经第二叶片54之间的空气从第二导流壁80与第三导流壁90之间流向各出风口112，这样，通过第二导流壁80与第三导流壁90的设置，使得经过各第二叶片54的空气能够被引导至出风口112，提高了出风效率。
请参阅图2及图12，第三导流壁90呈向第二导流壁80方向弧形外凸的形状，且第三导流壁90的口径从中心板113向内圈52方向逐渐增大，通过第三导流壁90的上述结构设计，使得从各第二叶片54流出的空气更平滑的流向出风口112，减少摩擦声。
请参阅图2及图12，第三导流壁90的中心设有安装筒100，安装筒100内凹设于第三导流壁90的中心位置，安装筒100与中心板113固定连接。第三导流壁90、安装筒100、内圈52及安装部51围合形成有安装腔，电机60安装于安装腔中，且安装筒100上设有安装座，电机60安装于安装座上，安装部51也与安装座固定连接。
在具体的实施例中，请参阅图1及图2，外壳10还包括第一套筒12、第二套筒13及底座14，第一套筒12与第二套筒13沿轴向平齐连接，第一套筒12套设于第一导流壁70及第二导流壁80外，外环114与第一套筒12背离第二套筒13的一端连接，第二套筒13套设于过滤网20外，底座14盖设于第二套筒13背离第一套筒12的一端，底座14该设于过滤网20背离风轮30的一端上，第二套筒13沿周向布满进风孔17。
以上仅为本申请的可选实施例而已，并不用于限制本申请。对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (19)

  1. 空气净化器，其特征在于，包括外壳，所述外壳内具有间隔设置的过滤腔及驱动腔，所述过滤腔内设有过滤网，所述驱动腔内设有风轮；所述外壳上设有供外界空气进入所述过滤网的进风孔，所述过滤腔与所述驱动腔之间设有供经过所述过滤网过滤后的空气进入所述驱动腔的进风结构，所述外壳上还设有供驱动腔内的空气回到外界的出风结构；
    所述进风结构包括第一进风面和第二进风面，所述第一进风面轴向伸入所述过滤网的中空区域中并与所述风轮同轴设置，所述第二进风面自所述第一进风面的周缘延伸至所述过滤网朝向所述风轮的端口；所述第一进风面和所述第二进风面上均沿周向均匀分布有多个进风口。
  2. 根据权利要求1所述的空气净化器，其特征在于，所述第一进风面为平面并与所述过滤网的轴向垂直；
    或者，所述第一进风面呈向所述风轮方向内凹的曲面；
    或者，所述第一进风面呈背离所述风轮方向外凸的曲面。
  3. 根据权利要求1所述的空气净化器，其特征在于，所述第二进风面呈圆锥状，且所述第二进风面的口径沿背离所述第一进风面的方向逐渐增大；
    或者，所述第二进风面相对所述第二进风面42的中心轴呈外凸的圆弧状。
  4. 根据权利要求1所述的空气净化器，其特征在于，所述第一进风面为平面并与所述过滤网的轴向垂直；所述第二进风面呈圆锥面，且所述第二进风面的口径沿背离所述第一进风面的方向逐渐增大；
    其中，所述第二进风面相对所述过滤网内壁的倾斜角度范围为15 °～45°；所述第一进风面轴向伸入所述过滤网的距离范围为35mm～65mm。
  5. 根据权利要求1至4任一项所述的空气净化器，其特征在于，所述驱动腔内还设有导流结构，所述导流结构设于所述风轮与所述出风结构之间并与所述风轮同轴设置；所述风轮为离心风轮并具有呈螺旋分布的多个第一叶片，所述导流结构具有呈螺旋分布的多个第二叶片。
  6. 根据权利要求5所述的空气净化器，其特征在于，所述第一叶片的旋转方向与所述第二叶片的螺旋方向相反。
  7. 根据权利要求5所述的空气净化器，其特征在于，各所述第一叶片的最大外径小于各所述第二叶片的最小内径。
  8. 根据权利要求5所述的空气净化器，其特征在于，所述导流结构包括同轴设置且由内到外依次分布的安装部、内圈及外圈，所述安装部用于安装固定，所述内圈与所述安装部连接，所述外圈围设于所述内圈外，所述第二叶片分布于所述内圈与所述外圈之间。
  9. 根据权利要求8所述的空气净化器，其特征在于，所述第二叶片在所述内圈上自所述内圈靠近所述第一叶片的一端向背离所述第一叶片的一端，沿背离其前方第二叶片的方向弧线延伸；且所述第二叶片在所述外圈上自所述外圈靠近所述第一叶片的一端向背离所述第一叶片的一端，沿背离其前方所述第二叶片的方向弧线延伸。
  10. 根据权利要求9所述的空气净化器，其特征在于，所述第二叶片自所述内圈向所述外圈沿弧线延伸。
  11. 根据权利要求5所述的空气净化器，其特征在于，所述驱动腔内设有电机，所述电机用于驱动各所述第一叶片旋转，所述电机的旋转方向与各所述第一叶片的螺旋方向相反。
  12. 根据权利要求8所述的空气净化器，其特征在于，所述风轮包括沿其轴向间隔设置的安装架及安装环，所述安装架的顶部轮廓与所述安装部的底部轮廓相适配，各所述第一叶片连接于所述安装架与所述安装环之间。
  13. 根据权利要求12所述的空气净化器，其特征在于，所述出风结构包括多根沿周向螺旋分布的连接条，各所述连接条的螺旋方向与各所述第二叶片的螺旋方向相同，相邻两所述连接条之间形成出风口。
  14. 根据权利要求13所述的空气净化器，其特征在于，各所述连接条呈外凸的弧形设置。
  15. 根据权利要求14所述的空气净化器，其特征在于，所述出风结构包括中心板及围设于所述中心板外的外环，所述中心板用于安装电机及导流结构，各所述连接条分别连接于所述中心板与所述外环之间。
  16. 根据权利要求15所述的空气净化器，其特征在于，所述驱动腔内设有连接于所述进风结构与所述外圈之间的第一导流壁，经过所述离心风轮的空气均离心集中在所述离心风轮与所述第一导流壁之间，并由所述第一导流壁引导至各所述第二叶片之间。
  17. 根据权利要求15所述的空气净化器，其特征在于，所述驱动腔中还设有连接于所述外圈与所述外环之间的第二导流壁，以及连接于所述内圈与所述中心板之间的第三导流壁，流经所述第二叶片之间的空气从所述第二导流壁与所述第三导流壁之间流向各所述出风口。
  18. 根据权利要求17所述的空气净化器，其特征在于，所述第三导流壁呈向所述第二导流壁方向弧形外凸的形状，且所述第三导流壁的口径从所述中心板向所述内圈方向逐渐增大。
  19. 根据权利要求17所述的空气净化器，其特征在于，所述外壳还包括第一套筒、第二套筒及底座，所述第一套筒与所述第二套筒沿轴向连接，所述第一套筒套设于所述第一导流壁及所述第二导流壁外，所述第二套筒套设于所述过滤网外，所述底座盖设于所述第二套筒背离所述第一套筒的一端，所述第二套筒沿周向布满所述进风孔。
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