US20210025606A1 - Air cleaner - Google Patents

Air cleaner Download PDF

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Publication number
US20210025606A1
US20210025606A1 US16/589,035 US201916589035A US2021025606A1 US 20210025606 A1 US20210025606 A1 US 20210025606A1 US 201916589035 A US201916589035 A US 201916589035A US 2021025606 A1 US2021025606 A1 US 2021025606A1
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US
United States
Prior art keywords
fan
air
guide
end plate
blade
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US16/589,035
Other languages
English (en)
Inventor
Si Zhong
Huangyang Li
Guoqiang Lin
Wentao Rao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Vork Health Industry Co Ltd
Original Assignee
Xiamen Vork Health Industry Co Ltd
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 Xiamen Vork Health Industry Co Ltd filed Critical Xiamen Vork Health Industry Co Ltd
Assigned to XIAMEN VORK HEALTH INDUSTRY CO., LTD. reassignment XIAMEN VORK HEALTH INDUSTRY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LI, HUANGYANG, LIN, GUOQIANG, RAO, WENTAO, ZHONG, Si
Publication of US20210025606A1 publication Critical patent/US20210025606A1/en
Abandoned legal-status Critical Current

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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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • F24F3/1603—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • 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
    • 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
    • F24F13/20—Casings or covers
    • F24F2013/205—Mounting a ventilator fan therein
    • 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
    • F24F8/80—Self-contained air purifiers

Definitions

  • the present invention relates to an air cleaner, and more particularly to a novel air cleaner.
  • a fan wheel functions as the power source of an air cleaner, so its structural design will directly affect the aerodynamic performance.
  • the main parameters of the aerodynamic performance are air volume and noise.
  • the design of the fan wheel structure aims to have a large air volume and a small noise.
  • An air duct system of a centrifugal fan wheel without a volute casing is generally applied to the power mechanism of most home air cleaners, including an air duct and a fan wheel.
  • the air duct system is capable of achieving equal air outflow and providing a straight air intake direction and a straight air outlet direction.
  • This structure meets the requirements of most home air clearers.
  • the outer diameters of most centrifugal fan wheels are designed to be a single grade outer diameter.
  • the air duct may have the phenomenon of flow around.
  • the increase in resistance along the path leads to a decrease in air volume.
  • the loss of air volume is aggravated.
  • the primary object of the present invention is to provide an air cleaner that reduces noise and improves user experience without reducing air volume.
  • An air cleaner comprises a housing having an air duct.
  • a filter element, a fan wheel and a motor are disposed sequentially from an air inlet to an air outlet of the air duct.
  • the fan wheel includes a rear end plate that cooperates with a drive shaft of the motor, an annular front end plate, and a plurality of fan blades that are mounted at equal intervals between the rear end plate and the front end plate.
  • a central opening of the front end plate is defined as an airflow inlet of the fan wheel.
  • An airflow outlet of the fan wheel is defined between an outer edge of the front end plate and an outer edge of the rear end plate.
  • the rear end plate has an outer diameter defined as D 1 .
  • the front end plate has an outer diameter defined as D 2 . D 2 is less than D 1 and
  • an outer end of each fan blade has a two-stage design, including a first outer edge and a second outer edge.
  • the first outer edge is connected to the outer edge of the rear end plate.
  • the second outer edge is connected to the outer edge of the front end plate.
  • a curved outer edge is connected between the first outer edge and the second outer edge.
  • each fan blade has an air outlet angle of 60° to 68°, an air intake angle of 58° to 64°, and an extension angle of 54° to 64°.
  • the number of the fan blades is 9-11.
  • the air outlet angle of the fan blade is the included angle between an outer edge tangent of the fan blade and the diameter crossing the tangent point of the outer edge tangent of the fan wheel.
  • the air intake angle is the included angle between an inner edge tangent of the fan blade and the diameter crossing the tangent point of the inner edge tangent of the fan wheel.
  • the extension angle of the fan blade is the included angle between the radius crossing the fan blade inner end of the fan wheel and the radius crossing the fan blade outer end of the fan wheel.
  • the air outlet angle of the fan blade is 64°
  • the air intake angle of the fan blade is 62°
  • the extension angle of the fan blade is 59°
  • the number of the fan blades is 9.
  • a curved surface is formed between the fan blade outer end and the fan blade inner end.
  • each fan blade is inclined along the airflow inlet toward the outer edge of the rear end plate to form an inclined surface that is a curved surface.
  • a central portion of the rear end plate is provided with a guide boss protruding toward the airflow inlet.
  • a guide slope is formed between an outer edge of the guide boss and the outer edge of the rear end plate.
  • the rear end plate is provided with a plurality of pairs of ribs corresponding in position to the fan blades for retaining the fan blades.
  • the air cleaner further comprises a guide unit.
  • the guide unit is mounted in the air duct and located between the air outlet and the motor.
  • the guide unit includes an outer mounting seat, an inner mounting seat, and a plurality of guide blades that are mounted at equal intervals between the outer mounting seat and the inner mounting seat.
  • Each guide blade has a guide fan inner end connected to an outer circumference of the inner mounting seat and a guide blade outer end connected to an inner side of the outer mounting seat.
  • the outer mounting seat is mounted on a side wall of the air duct. A guide direction of each guide blade is deflected from an inner side to an outer side of the guide unit.
  • the guide blade outer end has a width of 18-22 mm.
  • the guide blade inner end has a width of 28-32 mm.
  • Each guide blade has a height of 37-41 mm.
  • the guide blade inner end has an air intake angle of 60° to 70° and an air outlet angle of 80° to 90°.
  • the guide blade outer end has an air intake angle of 60° to 70° and an air outlet angle of 80° to 90°.
  • the air intake angle of the guide blade inner end is the included angle between an inner edge tangent of the guide blade inner end and a rotation axis of the fan wheel.
  • the air outlet angle of the guide blade inner end is the included angle between an outer edge tangent of the guide blade inner end and a vertical plane of the rotation axis of the fan wheel.
  • the air intake angle of the guide blade outer end is the included angle between an inner edge tangent of the guide blade outer end and the rotation axis of the fan wheel.
  • the air outlet angle of the guide blade outer end is the included angle between an outer edge tangent of the guide blade outer end and the vertical plane of the rotation axis of the fan wheel.
  • the outer diameter of the front end plate of the fan wheel is less than the outer diameter of the rear end plate, thereby reducing the absolute velocity of the fan blades in the area of the airflow inlet to eliminate a self-loss area of jet streams of the fan wheel.
  • the noise is reduced without reducing air volume, and the user experience is improved.
  • the guide unit is disposed between the air outlet of the air duct and the motor, providing a guide function.
  • the air directed out by the fan wheel is centered toward the middle of the air outlet to avoid the phenomenon of flow around, thereby reducing the loss of air volume, ensuring uniform distribution of air velocity and improving the user experience.
  • FIG. 1 is a cross-sectional view in accordance with a preferred embodiment of the present invention
  • FIG. 2 is a perspective view of the fan wheel of the present invention
  • FIG. 3 is a front view of the fan wheel of the present invention.
  • FIG. 4 is a sectional view taken along line A-A of FIG. 3 ;
  • FIG. 5 is a perspective view of the guide unit of the present invention.
  • FIG. 6 is a top view of the guide unit of the present invention.
  • FIG. 7 is a sectional view taken along line B-B of FIG. 6 ;
  • FIG. 8 is a schematic view showing the flow of air in accordance with the preferred embodiment of the present invention.
  • an air cleaner in accordance with a preferred embodiment of the present invention comprises a housing 1 having an air duct 11 .
  • a filter element 2 , a fan wheel 3 and a motor 4 are disposed sequentially from an air inlet 12 to an air outlet 13 of the air duct 11 .
  • the motor 4 drives the fan wheel 3 to rotate.
  • the air inside the fan wheel 3 is centrifugally directed out and flows along the air duct 11 toward the air outlet 13 to form a negative pressure area inside the fan wheel 3 .
  • the air outside the housing 1 is introduced to the filter element 2 via the air inlet 12 of the air duct 11 .
  • the particulates and harmful gases in the air are absorbed by the filter element 2 .
  • the clean air flows through the filter element 2 to the negative pressure area to be centrifugally directed out by the fan wheel 3 , such that the air is circulated and purified.
  • the fan wheel 3 includes a rear end plate 31 that cooperates with a drive shaft of the motor 4 , an annular front end plate 32 , and a plurality of fan blades 33 that are mounted at equal intervals between the rear end plate 31 and the front end plate 32 .
  • a central opening of the front end plate 32 is defined as an airflow inlet 34 of the fan wheel 3 .
  • An airflow outlet 35 of the fan wheel 3 is defined between the outer edge of the front end plate 32 and the outer edge of the rear end plate 31 .
  • the outer diameter of the rear end plate 31 is defined as D 1 .
  • the outer diameter of the front end plate 32 is defined as D 2 . D 2 is less than D 1 , and
  • D 1 is 148 mm and D 2 is 136 mm. Since the jet streams of the fan wheel 3 are centered in the area of the airflow inlet 34 , reducing the outer diameter of the front end plate 32 is equivalent to reducing the outer diameter of the fan blades 33 to reduce the absolute velocity of the fan blades 33 in the area of the airflow inlet 34 to thereby eliminate a self-loss area of jet streams of the fan wheel 3 and attain the object of reducing noise.
  • the outer end of the fan blade 33 has a two-stage design, including a first outer edge 331 and a second outer edge 332 .
  • the first outer edge 331 is connected to the outer edge of the rear end plate 31 .
  • the second outer edge 332 is connected to the outer edge of the front end plate 32 .
  • a curved outer edge 333 is connected between the first outer edge 331 and the second outer edge 332 to achieve a smooth transition from the first outer edge 331 to the second outer edge 332 .
  • the air outlet angle of the fan blade 33 is defined as ⁇ 1 .
  • the air intake angle of the fan blade 33 is defined as ⁇ 2 .
  • the extension angle of the fan blade 33 is defined as ⁇ 3 .
  • ⁇ 1 is in the range of 60° to 68°.
  • ⁇ 2 is in the range of 58° to 64°.
  • ⁇ 3 is in the range of 54° to 64°.
  • the number of the fan blades 33 is 9-11. In this embodiment, ⁇ 1 is 64°, ⁇ 2 is 62°, ⁇ 3 is 59°, and the number of the fan blades 33 is 9.
  • the air outlet angle al of the fan blade 33 is the included angle between an outer edge tangent of the fan blade 33 and the diameter crossing the tangent point of the outer edge tangent of the fan wheel 3 .
  • the air intake angle ⁇ 2 is the included angle between an inner edge tangent of the fan blade 33 and the diameter crossing the tangent point of the inner edge tangent of the fan wheel 3 .
  • the extension angle ⁇ 3 of the fan blade 33 is the included angle between the radius crossing the fan blade inner end 33 B of the fan wheel 3 and the radius crossing the fan blade outer end 33 A of the fan wheel 3 .
  • a large number of fan blades 33 (more than 11) may cause difficulty in mold design.
  • a small number of fan blades 33 (less than 9) may result in poor performance of the fan wheel 3 .
  • a curved surface is formed between the fan blade outer end 33 A and the fan blade inner end 33 B.
  • the fan blade 33 is inclined along the airflow inlet 34 toward the outer edge of the rear end plate 31 to form an inclined surface that is a curved surface.
  • the fan blade 33 having the above-mentioned shape realizes the guiding of the air stream introduced from the airflow inlet 34 , so that the air stream flows out from the airflow outlet 35 in a spiral manner to increase the included angle between the air stream in the radial direction and the axial direction of the air duct 11 and the side wall of the air duct 11 .
  • the air stream obliquely flows to the side wall of the air duct 11 , thereby reducing the kinetic energy loss of the air stream and increasing the air volume of the air cleaner.
  • the central portion of the rear end plate 31 is provided with a guide boss 311 protruding toward the airflow inlet 34 .
  • a guide slope 312 is formed between the outer edge of the guide boss 311 and the outer edge of the rear end plate 31 .
  • the rear end plate 31 is provided with a plurality of pairs of ribs 313 corresponding in position to the fan blades 33 for retaining the fan blades 33 , so that the fan blades 33 are retained on the rear end plate 31 to improve the structural stability and prevent the fan blades 33 from shaking.
  • the present invention further comprises a guide unit 5 as shown in FIGS. 5 - 7 .
  • the guide unit 5 is mounted in the air duct 11 and located between the air outlet 13 and the motor 4 .
  • the guide unit 5 includes an outer mounting seat 51 , an inner mounting seat 52 , and a plurality of guide blades 53 that are mounted at equal intervals between the outer mounting seat 51 and the inner mounting seat 52 .
  • Each guide blade 53 has a guide fan inner end 53 A connected to the outer circumference of the inner mounting seat 52 and a guide blade outer end 53 B connected to the inner side of the outer mounting seat 51 .
  • the outer mounting seat 51 is mounted on the side wall of the air duct 11 .
  • the guide direction of the guide blade 53 is deflected from the inner side to the outer side of the guide unit 5 .
  • the guide blade 53 having the above-mentioned shape realizes the guiding of the air from the input end (the lower end in FIG. 8 ) of the guide unit 5 , so that the air flows out from the output end (the upper end in FIG. 8 ) of the guide unit 5 in a spiral manner to be centered in the middle, avoiding the phenomenon of flow around, reducing the loss of air volume and ensuring uniform distribution of air velocity.
  • the width of the guide blade outer end 53 B is 18-22 mm.
  • the width of the guide blade inner end 53 A is 28-32 mm.
  • the height of the guide blade 53 is 37-41 mm.
  • the air intake angle of the guide blade inner end 53 A is in the range of 60° to 70°.
  • the air outlet angle of the guide blade inner end 53 A is in the range of 80° to 90°.
  • the air intake angle of the guide blade outer end 53 B is in the range of 60° to 70°.
  • the air outlet angle of the guide blade outer end 53 B is in the range of 80° to 90°.
  • the air intake angle of the guide blade inner end 53 A is the included angle between an inner edge tangent of the guide blade inner end 53 A and a rotation axis of the fan wheel 3 .
  • the air outlet angle of the guide blade inner end 53 A is the included angle between an outer edge tangent of the guide blade inner end 53 A and the vertical plane of the rotation axis of the fan wheel 3 .
  • the air intake angle of the guide blade outer end 53 B is the included angle between an inner edge tangent of the guide blade outer end 53 B and the rotation axis of the fan wheel 3 .
  • the air outlet angle of the guide blade outer end 53 B is the included angle between an outer edge tangent of the guide blade outer end 53 B and the vertical plane of the rotation axis of the fan wheel 3 .
  • the motor 4 drives the fan wheel 3 to rotate.
  • the air inside the fan wheel 3 is centrifugally directed out and flows along the air duct 11 toward the air outlet 13 to form a negative pressure area inside the fan wheel 3 .
  • the air outside the housing 1 is introduced to the filter element 2 via the air inlet 12 of the air duct 11 .
  • the particulates and harmful gases in the air are absorbed by the filter element 2 .
  • the clean air flows through the filter element 2 to the negative pressure area to be centrifugally directed out by the fan wheel 3 .
  • the structural design of the fan wheel 3 reduces the absolute velocity of the fan blades 33 in the area of the airflow inlet 34 to thereby eliminate a self-loss area of jet streams of the fan wheel 3 and attain the object of reducing noise.
  • the included angle between the air stream in the radial direction and the axial direction of the air duct 11 and the side wall of the air duct 11 is increased, so that the air stream is directed to the guide unit 5 in a spiral manner and then guided by the guide unit 5 .
  • the air stream is centered toward the middle of the air outlet 13 , so that the clean air is evenly discharged out of the air outlet 13 , thereby achieving the circulation and purification of the air.
  • the outer diameter of the front end plate 32 of the fan wheel 3 is less than the outer diameter of the rear end plate 31 , thereby reducing the absolute velocity of the fan blades 33 in the area of the airflow inlet 34 to eliminate a self-loss area of jet streams of the fan wheel 3 .
  • the noise is reduced without reducing the air volume, and the user experience is improved.
  • the guide unit 5 is disposed between the air outlet 13 of the air duct 11 and the motor 4 , providing a guide function.
  • the air directed out by the fan wheel 3 is centered toward the middle of the air outlet 13 to avoid the phenomenon of flow around, reducing the loss of air volume, ensuring uniform distribution of air velocity and improving the user experience.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US16/589,035 2019-07-24 2019-09-30 Air cleaner Abandoned US20210025606A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201921170176.6U CN210568923U (zh) 2019-07-24 2019-07-24 一种新型空气净化器
CN201921170176.6 2019-07-24

Publications (1)

Publication Number Publication Date
US20210025606A1 true US20210025606A1 (en) 2021-01-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US16/589,035 Abandoned US20210025606A1 (en) 2019-07-24 2019-09-30 Air cleaner

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US (1) US20210025606A1 (zh)
CN (1) CN210568923U (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112762007A (zh) * 2020-12-18 2021-05-07 厦门唯科健康产业有限公司 一种车载空气净化器小型离心风轮的设计方法
CN115264719B (zh) * 2021-04-29 2024-04-12 广东美的环境电器制造有限公司 空气处理设备

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