WO2019144736A1 - Hélice, ensemble ventilateur et appareil électrique - Google Patents

Hélice, ensemble ventilateur et appareil électrique Download PDF

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Publication number
WO2019144736A1
WO2019144736A1 PCT/CN2018/122430 CN2018122430W WO2019144736A1 WO 2019144736 A1 WO2019144736 A1 WO 2019144736A1 CN 2018122430 W CN2018122430 W CN 2018122430W WO 2019144736 A1 WO2019144736 A1 WO 2019144736A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
blade
end ring
outer edge
fan assembly
Prior art date
Application number
PCT/CN2018/122430
Other languages
English (en)
Chinese (zh)
Inventor
蓝渊
张辉
Original Assignee
美的集团股份有限公司
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
Priority claimed from CN201820153210.8U external-priority patent/CN207975028U/zh
Priority claimed from CN201810085632.0A external-priority patent/CN108050102A/zh
Application filed by 美的集团股份有限公司 filed Critical 美的集团股份有限公司
Publication of WO2019144736A1 publication Critical patent/WO2019144736A1/fr

Links

Classifications

    • 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
    • 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
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing

Definitions

  • the present application relates to the field of electrical appliances, and in particular to an impeller, a fan assembly, and an electrical appliance.
  • multi-blade centrifugal fans Most of the range hoods currently on the market use multi-blade centrifugal fans.
  • the key technology of multi-blade centrifugal fans is the efficient, low-noise aerodynamic design.
  • the current multi-blade centrifugal fan is generally low in efficiency, with small air volume, wind pressure, and relatively large noise.
  • the diameter affects the effect of the fume and the user experience. Therefore, how to improve the full-pressure efficiency of the multi-blade centrifugal fan, reduce the air loss, and reduce the noise become the key technology of the multi-blade centrifugal fan.
  • the front and rear end rings of the existing multi-blade centrifugal fan impellers are all in a straight circular ring shape.
  • the outer dimensions are basically the same as the outer diameter of the impeller blades.
  • the present application aims to solve at least one of the technical problems in the related art to some extent.
  • an object of the present application is to provide an impeller capable of reducing aerodynamic losses, improving the working efficiency of the fan assembly, and reducing noise.
  • Another object of the present application is to provide a fan assembly having the above described impeller.
  • Another object of the present application is to provide an electric appliance having the above described fan assembly.
  • the impeller according to the present application includes: two end rings connected between the two end rings, and a plurality of blades, the outer edges of at least one of the end rings being radially inward and radially outward The direction is beyond the outer edge of the blade.
  • the aerodynamic losses can be reduced by the cooperation of the two end rings and the plurality of blades, the working efficiency of the fan assembly can be improved, and the noise can also be reduced.
  • impeller according to the above embodiment of the present application may also have the following additional technical features:
  • the end ring has a diameter a, the radial distance of the outer edge of the blade to the central axis of the impeller is b/2, where a > 1.05b.
  • the two end rings have an incremental portion of increasing axial distance in a radially inward direction toward a radially outer direction at an excess portion beyond the outer edge of the blade.
  • the excess portion of at least one of the end rings beyond the outer edge of the blade is provided with an expanded edge that is inclined to the outside in the axial direction, the extended edge corresponding to the incremental segment.
  • the impeller is characterized by comprising: two end rings and a plurality of blades, the plurality of blades being connected between the two end rings, at least one of the end rings
  • the outer edge extends beyond the outer edge of the blade from a radially inner side to a radially outer side, the end ring having a diameter a, and the outer edge of the blade having a radial distance to the central axis of the impeller is b /2, the ratio of a to b causes the outer edge of the end ring to extend beyond the outer edge of the blade.
  • the two end rings have an incremental portion of increasing axial distance in a radially inward direction toward a radially outer direction at an excess portion beyond the outer edge of the blade.
  • the excess portion of at least one of the end rings beyond the outer edge of the blade is provided with an expanded edge that is inclined to the outside in the axial direction, the extended edge corresponding to the incremental segment.
  • the fan assembly includes: a volute, the impeller and the motor described above, the impeller being disposed in the volute; the motor being disposed in the volute and used to drive the impeller.
  • the fan assembly according to the above embodiment of the present application may further have the following additional technical features:
  • the volute has an air inlet, the end ring is adjacent to the air inlet, and the volute or the air guiding ring is disposed on the inner side wall surrounding the air inlet with the end ring Extended spoiler. .
  • the spoiler is annular.
  • the end ring is provided with an expansion edge, and the flow blocking member is located between the air inlet and the expansion side.
  • An appliance according to the present application includes the above described fan assembly.
  • FIG. 1 is a schematic view of a fan assembly in accordance with an embodiment of the present application.
  • FIG. 2 is a schematic view of a fan assembly according to an embodiment of the present application provided with a flow blocking member
  • FIG. 3 is a top plan view of a fan assembly in accordance with an embodiment of the present application.
  • FIG. 4 is a cross-sectional view of a fan assembly in accordance with an embodiment of the present application.
  • FIG. 5 is a schematic illustration of an impeller in accordance with an embodiment of the present application.
  • 6-9 are schematic illustrations of four different embodiments of an expanded edge of an impeller in accordance with an embodiment of the present application.
  • first and second may include one or more of the features, either explicitly or implicitly.
  • a plurality means two or more unless otherwise stated.
  • connection In the description of the present application, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise specifically defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • Connected, or integrally connected can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meanings of the above terms in the present application can be understood in the specific circumstances for those skilled in the art.
  • an impeller 10 includes: two end rings and a plurality of blades 2, the plurality of blades 2 being connected between the two end rings, the outer edge of at least one end ring being Exceeding the outer edge of the blade 2 from the radially inner side to the radially outer side, it is to be explained that the outer edge of the end ring beyond the outer edge of the blade 2 in the radially inner side in the radially outer direction may be One, or two, that is, the outer edges of the two end rings simultaneously extend beyond the outer edge of the blade 2 in a direction from the radially inner side to the radially outer side.
  • the fan assembly 20 may include: a volute 201 , an impeller 10 , and a motor 202 .
  • the impeller 10 is disposed in the volute 201
  • the motor 202 is disposed on the motor Inside the volute 201, and the motor 202 is drivingly coupled to one of the two end rings, the motor 202 is used to drive the rotation of the impeller 10, and one of the two end rings is connected to the motor 202 via a rotating shaft.
  • the motor 202 can drive the impeller 10 to rotate together, so that the operation of the fan assembly 20 can be achieved.
  • the volute 201 has an air inlet 2011, and the end ring is disposed adjacent to the air inlet 2011.
  • the two end rings are a first end ring 11 and a second end ring 12, respectively, and the volute 201 has an air inlet 2011, and the wind can enter the volute 201 through the air inlet 2011, the first end ring 11 is disposed adjacent to the air inlet opening 2011, and the motor 202 and the second end ring 12 are fixedly disposed, that is, the motor 202 is connected to the second end ring 12, and the power of the motor 202 can be transmitted to the impeller 10, wherein the upper end ring The first end ring 11 and the lower end end ring are the second end ring 12.
  • the volute 201 has two air inlets and outlets 2011, and the first end ring 11 and the second end ring 12 are respectively disposed adjacent to the upper and lower air inlets 2011, and the wind can enter the volute 201 through the air inlets 2011.
  • the first end ring 11 is disposed adjacent to the air inlet opening 2011, and the motor 202 and the second end ring 12 are fixedly disposed. That is, the motor 202 is coupled to the second end ring 12, and the power of the motor 202 can be transmitted to the impeller 10.
  • the end ring of the upper end is the first end ring 11 and the end ring of the lower end is the second end ring 12.
  • the impeller 10 When the fan assembly 20 is in operation, the impeller 10 is rotated at a high speed by the motor 202, the airflow enters the impeller 10 from the air inlet 2011, and then the airflow passes through the vane 2 through the diffusing space between the first end ring 11 and the second end ring 12. 5. Since the outer edge of the end ring extends beyond the outer edge of the blade 2 in the direction from the radially inner side to the radially outer side, the air flow can be smoothly entered into the inner cavity of the volute 201, and the aerodynamic loss of the air flow can be reduced. The efficiency of the fan assembly 20 can be improved, and noise can also be reduced.
  • the aerodynamic loss can be reduced, the working efficiency of the fan assembly 20 can be improved, and the noise can also be reduced.
  • the diameter of the end ring is a
  • the radial distance of the outer edge of the blade 2 to the central axis of the impeller 10 is b/2, where a ⁇ 1.05b, such that the end ring can be secured
  • the outer edge beyond the outer edge of the blade 2 can ensure the working performance of the impeller 10, and the end ring and the blade 2 satisfying the above relationship can make the overall structure of the impeller 10 suitable, and the work efficiency is improved, and the noise reduction effect is good.
  • the two end rings have an incremental increase in axial distance in a radially inward direction to a radially outer direction at an excess portion beyond the outer edge of the blade 2.
  • the distance between the first end ring 11 and the second end ring 12 gradually becomes larger, so that the first end ring 11 and the worm can be made.
  • the gap between the inner walls of the casing 201 is reduced, and the airflow can be prevented from flowing back to the air inlet port 2011 of the impeller 10 through the gap between the first end ring 11 and the inner wall of the volute 201, so that the impeller 10 and the volute can be effectively reduced.
  • the backflow leakage between 201 can further reduce the air loss and improve the aerodynamic efficiency.
  • the excess portion of the at least one end ring that extends beyond the outer edge of the blade 2 is provided with an expanded edge 4 that is inclined to the outside in the axial direction, and the expanded edge 4 corresponds to the incremental segment 3, which needs to be explained
  • the outer edges of the one end ring 11 and the second end ring 12 are respectively turned out to the axially outer side of the impeller 10, and the expanded side 4 may be arcuate, linear or any other combination of shapes, and finally the top distance of the expanded side 4 is made.
  • the size of the unfloating plane is indicated by the letter c, and c is greater than zero.
  • the expansion side 4 can be set to a straight type. As shown in FIG. 7, the expansion side 4 can also be set as a linear type + inner circular type combination, as shown in FIG. It may be arranged in an inner circular arc shape. As shown in FIG. 9, the expanded side 4 may also be provided in a combined shape of a straight shape and a circular arc shape, and the two end rings of the first end ring 11 and/or the second end ring 12 are The expansion edge 4, within the volute 201, enables the actual gap size of the first end ring 11 and/or the second end ring 12 and the inner wall of the volute 201 to be reduced, thereby preventing backflow of air.
  • the two end ring structures of the impeller 10 are invented according to the aerodynamic principle, which can reduce airflow diffusion loss, leakage loss, improve aerodynamic efficiency, reduce noise, etc., and experimental data shows that the impeller The first end ring and the second end ring are provided with an expansion side 4, and the fan assembly 20 including the impeller 10 has a full pressure efficiency increase of more than 2% and a noise reduction of 1.5 dB or more.
  • the impeller 10 may include: two end rings and a plurality of blades 2 connected between the two end rings, the outer edges of the at least one end ring being radially inwardly
  • the outer side of the blade 2 is beyond the outer side of the blade 2 in the direction of the radially outer side. It should be explained that the outer edge of the end ring beyond the outer edge of the blade 2 may be one in the direction of the radially inner side and the outer side in the radial direction. Two, that is to say, the outer edges of the two end rings simultaneously extend beyond the outer edge of the blade 2 in a direction from the radially inner side to the radially outer side.
  • the diameter of the end ring is a
  • the radial distance of the outer edge of the blade 2 to the central axis of the impeller 10 is b/2, wherein the ratio of a to b allows the outer edge of the end ring to extend beyond the outer edge of the blade 2, which ensures
  • the working performance of the impeller 10, and the end ring and the blade 2 satisfying the above relationship can make the overall structure of the impeller 10 suitable, and the work efficiency is improved, and the noise reduction effect is good.
  • the two end rings have an incremental increase in axial distance in a radially inward direction to a radially outer direction at an excess portion beyond the outer edge of the blade 2.
  • the distance between the first end ring 11 and the second end ring 12 gradually becomes larger, so that the first end ring 11 and the worm can be made.
  • the gap between the inner walls of the casing 201 is reduced, and the airflow can be prevented from flowing back to the air inlet port 2011 of the impeller 10 through the gap between the first end ring 11 and the inner wall of the volute 201, so that the impeller 10 and the volute can be effectively reduced.
  • the backflow leakage between 201 can further reduce the air loss and improve the aerodynamic efficiency.
  • the excess portion of the at least one end ring that extends beyond the outer edge of the blade 2 is provided with an expanded edge 4 that is inclined to the outside in the axial direction, and the expanded edge 4 corresponds to the incremental segment 3, which needs to be explained
  • the outer edges of the one end ring 11 and the second end ring 12 are respectively turned out to the axially outer side of the impeller 10, and the expanded side 4 may be arcuate, linear or any other combination of shapes, and finally the top distance of the expanded side 4 is made.
  • the size of the unfloating plane is indicated by the letter c, and c is greater than zero.
  • the expansion side 4 can be set to a straight type. As shown in FIG. 7, the expansion side 4 can also be set as a linear type + inner circular type combination, as shown in FIG. It may be arranged in an inner circular arc shape. As shown in FIG. 9, the expanded side 4 may also be provided in a combined shape of a straight shape and a circular arc shape, and the two end rings of the first end ring 11 and/or the second end ring 12 are The expansion edge 4, within the volute 201, enables the actual gap size of the first end ring 11 and/or the second end ring 12 and the inner wall of the volute 201 to be reduced, thereby preventing backflow of air.
  • the two end ring structures of the impeller 10 are invented according to the aerodynamic principle, which can reduce airflow diffusion loss, leakage loss, improve aerodynamic efficiency, reduce noise, etc., and experimental data shows that the impeller The first end ring and the second end ring are provided with an expansion side 4, and the fan assembly 20 including the impeller 10 has a full pressure efficiency increase of more than 2% and a noise reduction of 1.5 dB or more.
  • the volute 201 or the air guiding ring is disposed on the inner side wall surrounding the air inlet 2011 with a flow blocking member 203 extending toward the end ring, and the flow blocking member 203 may be disposed in a ring shape, and the flow blocking member The 203 has the effect of blocking the backflow of air, and can further block the backflow of the air, so that the loss of the air volume can be further prevented.
  • the end ring is provided with an expansion edge 4, and the flow block 203 is located between the air inlet 2011 and the expansion side 4, so that the expansion edge 4 and the flow block 203 are arranged to better block air from the air.
  • the gap between the first end ring 11 and the inner wall of the volute 201 is returned to the air inlet port 2011 of the impeller 10, so that the air leakage loss can be further reduced, and the working efficiency of the fan assembly 20 can be further improved.
  • the electric appliance according to the embodiment of the present application includes the fan assembly 20 of the above embodiment, and the fan assembly 20 is installed and disposed on the electric appliance.
  • the fan assembly 20 can reduce the aerodynamic loss, can improve the working efficiency of the electric appliance, and can also reduce the electrical work. When the noise.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une hélice (10), un ensemble ventilateur (20) et un appareil électrique ; l'hélice (10) comprend deux anneaux d'extrémité (11, 12) et une pluralité de pales (2), la pluralité de pales (2) étant raccordées entre les deux anneaux d'extrémité (11, 12) et un bord externe d'au moins un anneau d'extrémité (11, 12) dépassant les bords externes des pales (2) dans la direction allant du côté interne radial au côté externe radial. L'hélice est susceptible de réduire la perte pneumatique, peut améliorer l'efficacité de travail de l'ensemble ventilateur et peut également réduire le bruit.
PCT/CN2018/122430 2018-01-29 2018-12-20 Hélice, ensemble ventilateur et appareil électrique WO2019144736A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201820153210.8U CN207975028U (zh) 2018-01-29 2018-01-29 叶轮、风机组件以及电器
CN201810085632.0 2018-01-29
CN201820153210.8 2018-01-29
CN201810085632.0A CN108050102A (zh) 2018-01-29 2018-01-29 叶轮、风机组件以及电器

Publications (1)

Publication Number Publication Date
WO2019144736A1 true WO2019144736A1 (fr) 2019-08-01

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Application Number Title Priority Date Filing Date
PCT/CN2018/122430 WO2019144736A1 (fr) 2018-01-29 2018-12-20 Hélice, ensemble ventilateur et appareil électrique

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WO (1) WO2019144736A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111946662A (zh) * 2020-08-25 2020-11-17 绍兴市上虞区兴荣风机有限公司 离心叶轮及风机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1196488A (en) * 1966-11-04 1970-06-24 Licentia Gmbh Radial Flow Fan for Enclosed Electric Machines
WO2010035584A1 (fr) * 2008-09-29 2010-04-01 ダイキン工業株式会社 Unité intérieure pour un climatiseur d’air monté au sol
CN104781561A (zh) * 2013-05-06 2015-07-15 Lg电子株式会社 离心式风扇
CN206513622U (zh) * 2017-01-16 2017-09-22 依必安派特穆尔芬根有限两合公司 风扇叶轮
CN108050102A (zh) * 2018-01-29 2018-05-18 美的集团股份有限公司 叶轮、风机组件以及电器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1196488A (en) * 1966-11-04 1970-06-24 Licentia Gmbh Radial Flow Fan for Enclosed Electric Machines
WO2010035584A1 (fr) * 2008-09-29 2010-04-01 ダイキン工業株式会社 Unité intérieure pour un climatiseur d’air monté au sol
CN104781561A (zh) * 2013-05-06 2015-07-15 Lg电子株式会社 离心式风扇
CN206513622U (zh) * 2017-01-16 2017-09-22 依必安派特穆尔芬根有限两合公司 风扇叶轮
CN108050102A (zh) * 2018-01-29 2018-05-18 美的集团股份有限公司 叶轮、风机组件以及电器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111946662A (zh) * 2020-08-25 2020-11-17 绍兴市上虞区兴荣风机有限公司 离心叶轮及风机

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