WO2023079697A1 - プロペラファン、送風機および空気調和機 - Google Patents

プロペラファン、送風機および空気調和機 Download PDF

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Publication number
WO2023079697A1
WO2023079697A1 PCT/JP2021/040839 JP2021040839W WO2023079697A1 WO 2023079697 A1 WO2023079697 A1 WO 2023079697A1 JP 2021040839 W JP2021040839 W JP 2021040839W WO 2023079697 A1 WO2023079697 A1 WO 2023079697A1
Authority
WO
WIPO (PCT)
Prior art keywords
trajectory
propeller fan
wing
blade
region
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.)
Ceased
Application number
PCT/JP2021/040839
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
勝幸 山本
拓矢 寺本
惇司 河野
敬英 田所
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to US18/687,560 priority Critical patent/US12270411B2/en
Priority to PCT/JP2021/040839 priority patent/WO2023079697A1/ja
Priority to CN202180103733.6A priority patent/CN118251548A/zh
Priority to JP2023557553A priority patent/JP7568133B2/ja
Priority to EP21963292.4A priority patent/EP4428374A4/en
Publication of WO2023079697A1 publication Critical patent/WO2023079697A1/ja
Anticipated expiration legal-status Critical
Ceased 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade

Definitions

  • the present disclosure relates to propeller fans, blowers and air conditioners.
  • Patent Document 1 describes a propeller fan.
  • a propeller fan includes a rotating shaft and blades that rotate about the rotating shaft.
  • An object of the present disclosure is to obtain a propeller fan that is advantageous in terms of energy efficiency.
  • a propeller fan includes a rotating shaft and blades that rotate about the rotating shaft.
  • the first trajectory connecting the leading edge of the blade and the outer peripheral edge of the wing is different from the second trajectory connecting the center of the rotating shaft and the leading edge. It inclines so that the outer peripheral edge side may retreat.
  • the third locus connecting the root of the blade and the outer peripheral edge of the blade is different from the fourth locus connecting the center of the rotating shaft and the root.
  • the outer peripheral edge side is inclined to recede.
  • FIG. 2 is a side view for explaining the propeller fan of Embodiment 1;
  • FIG. 1 is a front view for explaining a propeller fan according to Embodiment 1;
  • FIG. FIG. 4 is a diagram showing an application example of the propeller fan in Embodiment 1;
  • FIG. 5 is a front view for explaining a first modified example of the propeller fan of Embodiment 1;
  • FIG. 8 is a diagram showing an application example of the second modification of the propeller fan of Embodiment 1;
  • FIG. 8 is a front view for explaining a second modification of the propeller fan of Embodiment 1;
  • FIG. 8 is a front view for explaining a third modification of the propeller fan of Embodiment 1;
  • FIG. 1 is a side view illustrating a propeller fan according to Embodiment 1.
  • FIG. FIG. 2 is a front view for explaining the propeller fan of Embodiment 1.
  • FIG. A propeller fan according to the present disclosure includes a rotating shaft and blades 1 that rotate about the rotating shaft. The axis of rotation is formed as a boss 2 by way of example.
  • the propeller fan according to this embodiment is characterized by the shape of the blade 1. Specifically, at the same position in the axial direction of the rotating shaft, a first locus connecting the leading edge 1a of the blade 1 and the outer peripheral edge 1b of the blade 1 connects the center of the rotating shaft and the leading edge 1a.
  • the outer peripheral end 1b side is inclined to retreat with respect to the second locus.
  • the third trajectory connecting the root 1c of the blade 1 and the outer peripheral edge 1b of the blade 1 at the same position in the axial direction of the rotating shaft becomes the fourth trajectory connecting the center of the rotating shaft and this root 1c.
  • the outer peripheral end 1b side is inclined so as to recede.
  • Figures 1 and 2 explain the features of the shape described above.
  • Lines indicated by symbols A, B and C in FIG. 1 explain "same positions in the axial direction of the rotating shaft".
  • the first and third trajectories described above are shown as solid-line trajectories in FIG.
  • the second trajectory and the fourth trajectory are shown as dashed trajectories in FIG.
  • Code A, code B and code C in FIG. 2 correspond to code A, code B and code C in FIG. 1, respectively.
  • the propeller fan according to this embodiment can be applied to any blower, for example.
  • a blower is a device that blows air using an airflow generated by a propeller fan.
  • FIG. 3 is a diagram showing an application example of the propeller fan of Embodiment 1.
  • the propeller fan according to the present embodiment can be provided in the outdoor unit 3 of the air conditioner 10, for example.
  • the air conditioner 10 includes an indoor unit 11 that blows air into the room, and an outdoor unit 3 that is connected to the indoor unit 11 by a pipe 12 .
  • a propeller fan applied to the outdoor unit 3 is covered with, for example, a semi-open bell mouth 4 that does not cover the upstream side of the propeller fan. Even when the propeller fan is applied to a device other than the outdoor unit 3, it can be used while being covered by the half-open bell mouth 4.
  • a half-open bell mouth 4 covers part of the wing 1.
  • a region where the wing 1 is not covered by the bell mouth that is, a region R1 where the wing 1 and the bell mouth 4 do not overlap
  • a large flow F from the fan side surface to the wing 1 can occur. Therefore, it is desirable that the inclination of the first trajectory with respect to the second trajectory is formed at least in the region R1 where the bell mouth 4 and the wing 1 do not overlap.
  • the inclination of the third trajectory with respect to the fourth trajectory is desirably formed at least in the region R1 where the bell mouth 4 and the wing 1 do not overlap.
  • FIG. 4 is a front view for explaining a first modified example of the propeller fan of Embodiment 1.
  • FIG. 4 In general, the flow F from the fan side surface, which has a radial component, tends to increase toward the downstream side, that is, toward the trailing edge 1 d side of the blade 1 . Therefore, as shown in FIG. 4, the inclination of the above-described first trajectory with respect to the second trajectory may be increased toward the trailing edge 1d side of the blade 1.
  • the inclination of the third trajectory with respect to the fourth trajectory may be increased toward the trailing edge 1 d side of the blade 1 .
  • the slope of the third trajectory with respect to the fourth trajectory may be greater than the slope of the first trajectory with respect to the second trajectory.
  • the inclination of the first trajectory with respect to the second trajectory does not necessarily have to increase toward the trailing edge 1d side of the blade 1 over the entire area. If there is not a little region where the inclination of the first trajectory with respect to the second trajectory increases toward the trailing edge 1d side of the blade 1, the effect of improving the energy efficiency can be achieved. Similarly, the inclination of the third trajectory with respect to the fourth trajectory does not necessarily have to increase toward the trailing edge 1d side of the blade 1 over the entire area.
  • FIG. 5 is a diagram showing an application example of the second modification of the propeller fan of Embodiment 1.
  • FIG. FIG. 6 is a front view for explaining a second modification of the propeller fan of Embodiment 1.
  • FIG. Lines denoted by symbols A, B, C and D in FIG. 5 explain "the same position in the axial direction of the rotating shaft", like the lines denoted by respective symbols in FIG. Code A, code B, code C and code D in FIG. 6 respectively correspond to code A, code B, code C and code D in FIG.
  • the flow F from the side of the fan is small. Therefore, in the region R2 where the bell mouth 4 and the wing 1 overlap, the backward inclination of the first trajectory with respect to the second trajectory is made smaller than in the region R1 where the bell mouth 4 and the wing 1 do not overlap. good too.
  • the backward inclination of the third trajectory with respect to the fourth trajectory is made smaller than in the region R1 where the bell mouth 4 and the wing 1 do not overlap. good too.
  • the backward inclination of the third trajectory in the region R2 where the bell mouth 4 and the wing 1 overlap with respect to the fourth trajectory is compared with the inclination of the first trajectory in the region R1 where the bell mouth 4 and the wing 1 do not overlap. 2 may be less than the backward tilt for the trajectory. According to this configuration, it is possible to provide a propeller fan that is more energy efficient.
  • the third trajectory is tilted with respect to the fourth trajectory so that the outer peripheral end side of the wing 1 moves forward.
  • the first trajectory may be inclined with respect to the second trajectory so that the outer peripheral end side of the wing 1 moves forward.
  • FIG. 7 is a front view for explaining a third modification of the propeller fan of Embodiment 1.
  • the propeller fan according to the present disclosure can also be applied to a bossless configuration in which blades 1 are directly and integrally connected without bosses 2, for example.
  • the axis of rotation is formed in the central portion of the integrally connected blades 1 .
  • the propeller fan according to the present disclosure can be used for various blowers or outdoor units of air conditioners.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/JP2021/040839 2021-11-05 2021-11-05 プロペラファン、送風機および空気調和機 Ceased WO2023079697A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US18/687,560 US12270411B2 (en) 2021-11-05 2021-11-05 Propeller fan, blower, and air conditioner
PCT/JP2021/040839 WO2023079697A1 (ja) 2021-11-05 2021-11-05 プロペラファン、送風機および空気調和機
CN202180103733.6A CN118251548A (zh) 2021-11-05 2021-11-05 螺旋桨式风扇、送风机以及空调机
JP2023557553A JP7568133B2 (ja) 2021-11-05 2021-11-05 プロペラファン、送風機および空気調和機
EP21963292.4A EP4428374A4 (en) 2021-11-05 2021-11-05 PROPELLER FANS, BLOWER AND AIR CONDITIONING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/040839 WO2023079697A1 (ja) 2021-11-05 2021-11-05 プロペラファン、送風機および空気調和機

Publications (1)

Publication Number Publication Date
WO2023079697A1 true WO2023079697A1 (ja) 2023-05-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/040839 Ceased WO2023079697A1 (ja) 2021-11-05 2021-11-05 プロペラファン、送風機および空気調和機

Country Status (5)

Country Link
US (1) US12270411B2 (https=)
EP (1) EP4428374A4 (https=)
JP (1) JP7568133B2 (https=)
CN (1) CN118251548A (https=)
WO (1) WO2023079697A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11201084A (ja) * 1998-01-08 1999-07-27 Matsushita Electric Ind Co Ltd 送風装置
JP2006233886A (ja) * 2005-02-25 2006-09-07 Mitsubishi Electric Corp プロペラファン
WO2009130954A1 (ja) * 2008-04-22 2009-10-29 三菱電機株式会社 送風機およびこの送風機を用いたヒートポンプ装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62282198A (ja) 1986-05-30 1987-12-08 Mitsubishi Electric Corp 軸流フアン
JP4190683B2 (ja) * 1999-11-22 2008-12-03 株式会社小松製作所 ファン装置
JP3629702B2 (ja) 2001-12-21 2005-03-16 ダイキン工業株式会社 送風機
JP4467952B2 (ja) 2003-11-10 2010-05-26 東芝キヤリア株式会社 プロペラファン、これを用いた空気調和機用室外ユニット
US11067093B2 (en) * 2017-02-28 2021-07-20 Mitsubishi Electric Corporation Propeller fan, air-sending device, and air-conditioning apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11201084A (ja) * 1998-01-08 1999-07-27 Matsushita Electric Ind Co Ltd 送風装置
JP2006233886A (ja) * 2005-02-25 2006-09-07 Mitsubishi Electric Corp プロペラファン
WO2009130954A1 (ja) * 2008-04-22 2009-10-29 三菱電機株式会社 送風機およびこの送風機を用いたヒートポンプ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4428374A4 *

Also Published As

Publication number Publication date
US20250003420A1 (en) 2025-01-02
EP4428374A1 (en) 2024-09-11
EP4428374A4 (en) 2025-01-01
US12270411B2 (en) 2025-04-08
JP7568133B2 (ja) 2024-10-16
JPWO2023079697A1 (https=) 2023-05-11
CN118251548A (zh) 2024-06-25

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