US20200408221A1 - Oblique flow fan - Google Patents

Oblique flow fan Download PDF

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Publication number
US20200408221A1
US20200408221A1 US17/001,856 US202017001856A US2020408221A1 US 20200408221 A1 US20200408221 A1 US 20200408221A1 US 202017001856 A US202017001856 A US 202017001856A US 2020408221 A1 US2020408221 A1 US 2020408221A1
Authority
US
United States
Prior art keywords
blades
air guide
fan
oblique flow
flow fan
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
US17/001,856
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English (en)
Inventor
Yu Guo
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.)
Shenzhen Apet Evo & Iot Techenologles Ltd
Original Assignee
Shenzhen Apet Evo & Iot Techenologles 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
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Application filed by Shenzhen Apet Evo & Iot Techenologles Ltd filed Critical Shenzhen Apet Evo & Iot Techenologles Ltd
Assigned to SHENZHEN APET EVO & IOT TECHENOLOGLES LIMITED reassignment SHENZHEN APET EVO & IOT TECHENOLOGLES LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GUO, YU
Publication of US20200408221A1 publication Critical patent/US20200408221A1/en
Abandoned legal-status Critical Current

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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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D1/025—Comprising axial and radial stages
    • 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
    • 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
    • F04D17/06—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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns

Definitions

  • the invention belongs to the technical field of fans, in particular to a high-efficiency oblique flow fan, which is applied to various ventilation devices, equipment and systems.
  • fans can be divided into axial flow, oblique flow (also known as mixed flow) and turbine fans.
  • Oblique flow fans are widely used in ventilation devices, equipment and systems with certain wind resistance load due to their large air volume and pressure, good linearity and wide speed regulation range.
  • the general oblique flow fan simply distributes the fan blades in the cylindrical motor housing/cover.
  • the housing is also typically cylindrical.
  • the air inlet and the air outlet have the same diameter, without front and rear wind guide structures. The velocity of the air flow from the forward air to the rear air outlet end of the fan blade changes greatly or even abruptly.
  • the two sides of the fan blade have a large pressure difference, which causes turbulence and noise, and the air outlet flow is spiral, which increases the friction resistance between the air flow and the rear air outlet components, reduces the energy efficiency, and the air pressure is usually below 200 pa, thus limiting its application to a certain extent.
  • the technical issues to be solved by the invention are: solve the issues of large pressure difference between the front and rear ends of the fan blades of the existing fan due to large difference in airflow speed, forming turbulence and noise, reducing energy efficiency and the like, and aims to provide a fan with improved structure.
  • the present invention provides an oblique flow fan, comprising fan blades, an air guide cover, directional air guide blades and a housing, wherein the fan blades and the directional air guide blades are connected through a central bearing, the bearing fixed at the center of the conical fan blades passes through a reserved hole in the center of the directional air guide blades and is fixed, the air guide cover is directly stuck at the corresponding position on the housing through the action of a clamping point, and the directional air guide blades and the housing are fixed through screws.
  • the technical scheme adopted by the embodiment of the invention further comprises:
  • the fan blades is conical.
  • the technical scheme adopted by the embodiment of the invention further comprises:
  • the conical fan blades has a taper A of 50°-60°.
  • the inclination angle range between the conical fan blade and the axial direction is greater than B1 and less than B2, wherein the inclination angle B1 is 45° and the Inclination angle B2 is 65°.
  • the technical scheme adopted by the embodiment of the invention further comprises: The number of conical fan blades is odd.
  • the technical scheme adopted by the embodiment of the invention further comprises:
  • the air guide cover is a bell mouth cone, the air guide cover is close to the fan blades, and the taper D of the air guide cover is 6 to 8° smaller than the taper of the fan blades.
  • the technical scheme adopted by the embodiment of the invention further comprises:
  • the inclination angle E between the tangent line of the initial arc section of the air guide blade and the axial direction is about 45°.
  • the technical scheme adopted by the embodiment of the invention further comprises:
  • the number of directional air guide blades is even, which is one more than the number of fan blades.
  • the technical scheme adopted by the embodiment of the invention further comprises:
  • the housing is cylindrical.
  • the embodiment of the invention has the following beneficial effects:
  • the taper of the conical fan blades and motor housing/cover is between 50°-60°; a conical cover is used for air guide in the whole air supply part including the front end of the air blades; the taper is 6°-8° smaller than that of the fan blades; the air supply section between two fan blades is reduced appropriately and gradually in the whole process (the air volume is reduced after compression); the flow rate is kept as consistent as possible when the flow direction is changed; a “siphon effect” is generated at the front and rear ends of the fan blades; the pressure difference between the two sides of the fan blades is minimized; the drive resistance is minimized; at the same time, further, directional air guide blades are adopted at the air outlet end of the fan blades to guide the spiral air flow to axial direct flow, so as to reduce the friction resistance between the air flow and the components with no air, multiply the air pressure and energy efficiency of the fan, and effectively reduce noise.
  • FIG. 1 is an assembly schematic view of the oblique flow fan accord to an embodiment of the present invention
  • FIG. 2 is a schematic cross-sectional view of the oblique flow fan according to an embodiment of the present invention
  • FIG. 3 is a front view of the oblique flow fan according to an embodiment of the present invention.
  • the oblique flow fan includes fan blades 1 , an air guide 2 , directional air guide blades 3 and a housing 4 .
  • the oblique flow fan according to another embodiment of the present invention includes fan body 1 , an air guide 2 , directional air guide blades 3 and a housing 4 .
  • the fan blades 1 is conical and may have other shapes.
  • the fan blades 1 and the directional air guide blades 3 are connected by a central bearing (not shown). Bearings fixed in the center of the conical fan blades 1 pass through the reserved hole in the center of the directional air guide blade 3 and are fixed.
  • the air guide cover 2 is directly stuck to the corresponding position on the housing 4 by the action of the blocking point.
  • the connection mode between the directional air guide blade 3 and the housing 4 is fixed by screws or by other means.
  • the conical blades 1 has a taper A of 50°-60°.
  • the inclination angle range between the conical fan blade and the axial direction is greater than B1 and less than B2, wherein the inclination angle B1 is 45° and the Inclination angle B2 is 65°; namely, the air cutting angle range of the conical blade is greater than C2 and less than C1, wherein the air cutting angle C2 is 25° and the air cutting angle C1 is 45°.
  • the number of conical fan blades is odd.
  • the air guide cover 2 has a bell-shaped shape.
  • the air guide cover 2 is as close as possible to the conical fan blades 1 .
  • the taper D is 6°-8° smaller than the taper of the fan blades 1 ; the air supply section between two fan blades is reduced appropriately and gradually in the whole process (the air volume is reduced after compression); the flow rate is kept as consistent as possible when the flow direction is changed; a “siphon effect” is generated at the front and rear ends of the fan blades; the pressure difference between the two sides of the fan blades is minimized; the drive resistance is minimized and the wind pressure is increased exponentially (500-700 pa or higher).
  • the directional air guide blade 3 makes the spiral outlet air flow to axial direct flow, reducing the friction resistance between the air flow and the components with no air.
  • the housing 4 is a cylindrical housing, and it will be understood that the housing 4 may also be of other shapes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US17/001,856 2018-08-01 2020-08-25 Oblique flow fan Abandoned US20200408221A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201821231561.2U CN209041141U (zh) 2018-08-01 2018-08-01 一种斜流风机
CN201821231561.2 2018-08-01
PCT/CN2018/107164 WO2020024401A1 (zh) 2018-08-01 2018-09-23 一种斜流风机

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/107164 Continuation WO2020024401A1 (zh) 2018-08-01 2018-09-23 一种斜流风机

Publications (1)

Publication Number Publication Date
US20200408221A1 true US20200408221A1 (en) 2020-12-31

Family

ID=67030107

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/001,856 Abandoned US20200408221A1 (en) 2018-08-01 2020-08-25 Oblique flow fan

Country Status (3)

Country Link
US (1) US20200408221A1 (zh)
CN (1) CN209041141U (zh)
WO (1) WO2020024401A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN212690455U (zh) * 2020-06-02 2021-03-12 李敏 一种整体式扇叶

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6458946A (en) * 1987-08-31 1989-03-06 Toshiba Corp Outdoor unit of separation type air conditioner
JPH01134135A (ja) * 1987-11-18 1989-05-26 Matsushita Electric Ind Co Ltd 分離型空気調和機の送風装置
CN201288698Y (zh) * 2008-10-29 2009-08-12 上海南泰通风机设备有限公司 斜流风机
CN104121230A (zh) * 2013-04-24 2014-10-29 福建华大电机有限公司 一种导流式斜流风机

Also Published As

Publication number Publication date
WO2020024401A1 (zh) 2020-02-06
CN209041141U (zh) 2019-06-28

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