WO2013077095A1 - Axial flow fan - Google Patents
Axial flow fan Download PDFInfo
- Publication number
- WO2013077095A1 WO2013077095A1 PCT/JP2012/075924 JP2012075924W WO2013077095A1 WO 2013077095 A1 WO2013077095 A1 WO 2013077095A1 JP 2012075924 W JP2012075924 W JP 2012075924W WO 2013077095 A1 WO2013077095 A1 WO 2013077095A1
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- WO
- WIPO (PCT)
- Prior art keywords
- blade
- hub
- outer peripheral
- meat stealing
- fan
- Prior art date
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Classifications
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- 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
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
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- 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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
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- 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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
- F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
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- 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
- F04D29/388—Blades characterised by construction
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- 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
- F05D2230/00—Manufacture
- F05D2230/50—Building or constructing in particular ways
- F05D2230/53—Building or constructing in particular ways by integrally manufacturing a component, e.g. by milling from a billet or one piece construction
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- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
Definitions
- the present invention relates to an axial fan, and more particularly, to an axial fan in which a hub and a plurality of blades formed so as to protrude from the outer peripheral edge of the hub are integrally molded with resin.
- An object of the present invention is to form a meat stealing portion at the base of a blade in an axial fan in which a hub and a plurality of blades are integrally molded with a resin while suppressing molding defects at the outer peripheral portion of the blade.
- the axial fan according to the first aspect is one in which a hub and a plurality of blades formed so as to protrude from the outer peripheral edge of the hub are integrally molded with resin. And the 1st blade meat stealing part is formed in the base part with the hub of a blade
- the inventor of the present application when forming the meat stealing portion at the base of the blade, is left when the meat stealing portion is formed in consideration of the flow of the resin during molding to the outer peripheral portion of the meat stealing portion. The shape of the rib was studied.
- the inventors of the present application have found that the first blade meat stealing portion is formed so that the radial ribs extending radially toward the outer peripheral side are left as described above.
- Such radial ribs facilitate the flow of the resin injected into the mold at the time of molding toward the outer peripheral side, so that the resin can flow into the outer peripheral portion more than the first blade meat stealing portion at the time of molding. Can be made.
- the radial ribs make it easier for the resin injected into the mold to flow toward the outer peripheral side than when the ribs that do not extend radially are left. Thereby, in this axial flow fan, the meat stealing portion can be formed at the base portion of the blade while suppressing the molding failure in the outer peripheral portion of the blade.
- the axial fan according to the second aspect is the axial fan according to the first aspect, in which a plurality of radial ribs are arranged in the circumferential direction.
- a plurality of radial ribs are arranged in the circumferential direction, it is possible to increase in the circumferential direction the portion where the resin flows to the outer peripheral side of the first blade meat stealing portion during molding.
- this axial fan it can further accelerate
- the resin can easily flow evenly at any circumferential position of the portion on the outer peripheral side of the first blade meat stealing portion.
- the axial fan according to the third aspect is the axial fan according to the first or second aspect, wherein the radial ribs are directed from the hub axis toward the outer peripheral side when the hub and the blades are viewed from the axial direction. It extends on a straight line extending radially. As described above, if the radial ribs extend on a straight line extending radially from the hub axis toward the outer peripheral side, the resin injected into the mold during molding flows straight toward the outer peripheral side. . Thereby, in this axial fan, at the time of molding, the resin injected into the mold can be further flowed toward the outer peripheral side.
- the axial fan according to the fourth aspect is the axial fan according to any one of the first to third aspects, wherein a portion of the root portion on the leading edge side of the blade is located on the leading edge of the blade, relative to the radial rib. A continuous leading edge rib is formed. A second blade meat stealing portion larger than the first blade meat stealing portion is formed between the circumferential directions of the leading edge rib and the radial rib. As described above, in this axial fan, the strength at the leading edge of the blade is improved by forming the leading edge rib continuous to the leading edge of the blade at the portion of the leading edge side of the blade from the radial rib. .
- leading edge rib and its vicinity may be difficult to be cooled during molding. Therefore, in this axial fan, as described above, the front edge rib is formed, and the second blade meat stealing portion larger than the first blade meat stealing portion is formed between the front edge rib and the radial rib in the circumferential direction. Thus, the leading edge rib and its vicinity are prevented from becoming difficult to be cooled during molding. Thereby, in this axial fan, although not only the radial rib but also the leading edge rib is formed, the occurrence of sink marks during molding can be suppressed.
- An axial fan according to a fifth aspect is the axial fan according to any one of the second to fourth aspects, wherein radial ribs are arranged at equal intervals in the circumferential direction.
- the resin can easily flow into the plurality of radial ribs at the time of molding.
- the resin can more easily flow in the circumferential direction into the portion on the outer peripheral side than the first blade meat stealing portion.
- a recessed portion that is recessed toward the front edge side of the blade is formed at the rear edge of the blade.
- the 1st blade meat stealing part is located in the front edge side of a wing
- a recessed portion that is recessed toward the front edge side of the blade is formed, thereby improving the blowing performance and suppressing noise.
- the resin is less likely to flow into the dent and its vicinity during molding, and there is a possibility that a molding defect in the dent and its vicinity may occur. Therefore, in this axial fan, as described above, the first blade meat stealing portion is positioned on the front edge side of the blade with respect to the recess portion, and at the time of molding, the resin passes through the first blade meat stealing portion. It flows into the dent part and the vicinity thereof without any problems. Thereby, in this axial flow fan, although both the first blade meat stealing part and the dent part are formed, the inflow of the resin to the dent part at the time of molding and the vicinity thereof is secured, and the dent part And the molding defect of the vicinity can be suppressed.
- FIG. 6 is an enlarged view of a base portion of the blade of FIG. 5 and its vicinity. It is II sectional drawing of FIG. FIG.
- FIG. 7 is an enlarged view of the front edge rib of FIG. 6 and its vicinity. It is side surface sectional drawing of the metal mold
- FIGS. 1 and 2 are views showing an outdoor unit 2 of an air conditioner that employs an outdoor fan 70 as an axial fan according to an embodiment of the present invention.
- FIG. 1 and 2 are views showing an outdoor unit 2 of an air conditioner that employs an outdoor fan 70 as an axial fan according to an embodiment of the present invention.
- FIG. 1 is a plan view showing a state in which the top plate 57 of the outdoor unit 2 is removed.
- FIG. 2 is a front view of the outdoor unit 2.
- directions and surfaces such as “top”, “bottom”, “left”, “right”, “front”, “side”, “back”, “top”, “bottom” are shown.
- the wording means a direction and a surface when the outdoor unit 2 shown in FIG.
- the outdoor unit 2 has a structure (so-called trunk type structure) in which the blower chamber S1 and the machine chamber S2 are formed by dividing the internal space of the unit casing 51 into left and right by a partition plate 58 extending in the vertical direction. .
- the outdoor unit 2 is configured to suck outdoor air into the unit casing 51 from a part of the back surface and side surface of the unit casing 51 and blow out outdoor air from the front surface of the unit casing 51.
- the outdoor unit 2 mainly includes a unit casing 51, a compressor 21, an outdoor heat exchanger 24, refrigerant circuit components including refrigerant pipes connecting these devices, an outdoor fan 70 (axial fan), And a bell mouth 80.
- the blower chamber S1 is formed near the left side surface of the unit casing 51 and the machine chamber S2 is formed near the right side surface of the unit casing 51 will be described, but the left and right sides may be reversed.
- the unit casing 51 is formed in a substantially rectangular parallelepiped shape, and mainly accommodates the compressor 21, the outdoor heat exchanger 24, refrigerant circuit components including refrigerant pipes connecting these devices, and the outdoor fan 70. is doing.
- the unit casing 51 includes a bottom plate 52, a blower chamber side plate 53, a machine chamber side plate 54, a blower chamber side front plate 55, a machine chamber side front plate 56, and a top plate 57.
- the bottom plate 52 is a metal plate member that constitutes the bottom surface portion of the unit casing 51. Below the bottom plate 52, two foundation legs 59 and 60 fixed to the field installation surface are provided.
- the blower chamber side plate 53 is a metal plate-like member that constitutes a side surface portion of the unit casing 51 near the blower chamber S1.
- the lower part of the blower chamber side plate 53 is fixed to the bottom plate 52.
- the blower room side plate 53 is formed with an outdoor air suction port 53 a that is sucked into the unit casing 51 by the outdoor fan 70.
- the machine room side plate 54 is a metal plate-like member that constitutes a part of a side surface portion of the unit casing 51 near the machine room S2 and a back surface portion of the unit casing 51 near the machine room S2.
- the lower part of the machine room side plate 54 is fixed to the bottom plate 52.
- the machine room side plate 54 covers a portion closer to the back surface of the side surface of the machine room S2.
- an outdoor air suction port 53b that is sucked into the unit casing 51 by the outdoor fan 70 is formed. Has been.
- the blower chamber side front plate 55 is a metal plate-like member that constitutes the front portion of the blower chamber S1 of the unit casing 51 and a part of the front portion of the machine chamber S2 of the unit casing 51.
- the blower chamber side front plate 55 is provided with an outlet 55 a for blowing outdoor air sucked into the unit casing 51 by the outdoor fan 70.
- the front side of the outlet 55a is covered with a fan grill 55b.
- the lower portion of the blower chamber side front plate 55 is fixed to the bottom plate 52, and the left end portion thereof is fixed to the front end portion of the blower chamber side plate 53.
- the machine room side front plate 56 is a metal plate that is removed during a trial run or maintenance in order to access the machine room S2 from the front side of the unit casing 51 and inspect the equipment disposed in the machine room S2. It is a member.
- the machine room side front plate 56 is a metal plate-like member that constitutes a part of the front part of the machine room S2 of the unit casing 51 and a part of the side part of the machine room S2 of the unit casing 51.
- the machine room side front plate 56 has an end portion on the fan chamber S1 side fixed to an end portion on the machine room S2 side of the blower chamber side front plate 55, and an end portion on the back side on the front side of the machine room side plate 54. It is fixed to the end of the.
- the fan room side front board 55 a part of front part of machine room S2 of the unit casing 51 is comprised here by the fan room side front board 55, you may be comprised by the machine room side front board 56 here.
- the chamber side front plate 55 and the blower chamber side front plate 55 and the machine room side front plate 56 may be an integral member.
- the top plate 57 is a metal plate-like member that constitutes the top surface portion of the unit casing 51.
- the top plate 57 is fixed to the blower chamber side plate 53, the machine room side plate 54, and the blower chamber side front plate 55.
- the partition plate 58 is a metal plate-like member that is disposed on the bottom plate 52 and extends in the vertical direction.
- the partition plate 58 divides the internal space of the unit casing 51 into left and right to form a blower chamber S1 near the left side and a machine chamber S2 near the right side.
- the partition plate 58 has a curved shape such that a central portion in the front-rear direction protrudes toward the blower chamber S1.
- the lower portion of the partition plate 58 is fixed to the bottom plate 52, the front end portion thereof is fixed to the blower chamber side front plate 55, and the rear end portion thereof is the end of the outdoor heat exchanger 24 on the machine room S 2 side. It is fixed to the part.
- the outdoor fan 70 is a propeller fan in which a hub 71 and a plurality of (here, three) blades 72 formed so as to protrude from the outer periphery of the hub 71 are integrally molded with resin.
- the outdoor fan 70 is provided so as to face the front surface of the unit casing 51 in the blower chamber S1.
- the outdoor fan 70 is provided at a position on the front side of the outdoor heat exchanger 24 so as to face the air outlet 55a formed in the blower room side front plate 55.
- a recessed portion 72 a that is recessed toward the front edge side of the blade 72 is formed on the rear edge of the blade 72 in order to improve the blowing performance and suppress noise.
- the outdoor fan 70 is rotationally driven by a fan motor 79 disposed between the outdoor fan 70 and the outdoor heat exchanger 24 in the front-rear direction.
- the fan motor 79 is supported by a fan motor base 61 extending vertically between the top plate 57 and the bottom plate 52. The detailed configuration of the outdoor fan 70 will be described later.
- the bell mouth 80 is a member having a bell-shaped opening 81 having an opening at the center, and is provided on the outer peripheral side of the outdoor fan 70. That is, the bell mouth 80 is provided so as to face the front surface of the unit casing 51 in the blower chamber S ⁇ b> 1 like the outdoor fan 70, and the opening 81 surrounds the outer periphery of the outdoor fan 70.
- the bell mouth 80 is fixed to the front surface of the unit casing 51.
- a portion of the bell mouth 80 near the blower room side plate 53 is disposed close to the front end of the outdoor heat exchanger 24. Further, the portion of the bell mouth 80 near the machine room S ⁇ b> 1 is disposed close to the partition plate 58.
- the outdoor heat exchanger 24 is a substantially L-shaped heat exchanger panel, and is disposed on the bottom plate 52 along the left side surface and the back surface of the unit casing 51 in the blower chamber S1.
- the compressor 21 is a vertical cylindrical hermetic compressor and is disposed in the machine room S2.
- FIG. 3 is a perspective view of the outdoor fan 70.
- FIG. 4 is a plan view of the positive pressure surface side of the outdoor fan 70.
- FIG. 5 is a plan view of the negative pressure surface side of the outdoor fan 70.
- FIG. 6 is a side view of the outdoor fan 70.
- FIG. 7 is an enlarged view of the base portion 73 of the blade 72 and the vicinity thereof.
- FIG. 8 is a cross-sectional view taken along the line II of FIG.
- FIG. 9 is an enlarged view of the leading edge rib 76 of FIG. 6 and the vicinity thereof.
- the axis (rotation center) of the outdoor fan 70 is defined as the axis O, and its axis is defined as the rotation axis OO.
- the outdoor fan 70 is a propeller fan in which the hub 71 and a plurality of (here, three) blades 72 formed so as to protrude from the outer periphery of the hub 71 are integrally molded with resin. .
- the number of blades 72 is not limited to three, and may be four or more.
- wing 72 has the blade
- wing 72 is arrange
- the surface on the side into which air flows when the outdoor fan 70 is rotated is defined as the negative pressure surface 72b, and the surface on the opposite side (the downstream side in the air flow direction) is the positive surface.
- the pressure surface 72c is used.
- a first blade meat stealing portion 74 is formed at the base portion 73 of the blade 72 so that the radial ribs 75 extending radially toward the outer peripheral side are left. Further, a front edge rib 76 that is continuous with the front edge of the blade 72 is formed in a portion of the root portion 73 on the front edge side of the blade 72 relative to the radial rib 75. A second blade meat stealing portion 77 larger than the first blade meat stealing portion 74 is formed between the circumferential direction of the leading edge rib 76 and the radial rib 75. Specifically, the blade stealing portions 74 and 77 are formed on the suction surface 72 b of the blade 72.
- the blade stealing portions 74 and 77 are not formed on the negative pressure surface 72b, but may be formed only on the positive pressure surface 72c, or may be formed on both the negative pressure surface 72b and the positive pressure surface 72c. Good.
- the radial rib 75 has a thickness equivalent to that of the root portion 73, and its axial end is smoothly continuous with the blade surface of the blade 72 (see FIGS. 8 and 9).
- a plurality of radial ribs 75 (here, four) are arranged in the circumferential direction. That is, a plurality (four in this case) of the first blade meat stealing portions 74 are arranged so as to be located on both sides in the circumferential direction of the radial rib 75 from the rear edge side to the front edge side of the blade 72.
- the 2nd blade meat stealing part 77 is arrange
- two radial ribs 75 that are adjacent to each other with the first blade stealing portion 74 in the circumferential direction are smoothly continuous at their axial ends.
- the number of the radial ribs 75 is not limited to four, and may be three or less or five or more.
- the radial ribs 75 extend on a straight line L extending radially from the axis O of the hub 71 toward the outer peripheral side when the hub 71 and the blades 72 are viewed from the axial direction (see FIG. 7). Further, the radial ribs 75 are arranged at equal intervals in the circumferential direction. In other words, all the first blade meat stealing portions 74 have the same circumferential dimension at any radial position, whereby the radial ribs 75 are arranged at equal intervals in the circumferential direction. In contrast, the circumferential interval between the second feather meat stealing portion 77 and the first feather meat stealing portion 74 is larger than the circumferential interval between the first feather meat stealing portion 74 ( (See FIGS.
- the second blade meat stealing portion 77 has a circumferential dimension larger than that of the first blade meat stealing portion 74 at the same radial position.
- the leading edge rib 76 is formed so as to protrude from the blade surface of the blade 72 in the axial direction at the leading edge of the base portion 73 in order to improve the strength at the leading edge of the blade 72.
- the leading edge rib 76 has a substantially triangular prism shape, and is formed on both the negative pressure surface 72 b and the positive pressure surface 72 c of the blade 72.
- the circumferential width of the leading edge rib 76 is larger than the circumferential width of the radial rib 75 at the same radial position (see FIGS. 5 and 7).
- a substantially triangular recess 76a is formed in the portion of the front edge rib 76 near the hub 71 when the hub 71 and the blades 72 are viewed from the axial direction.
- the leading edge rib 76 is not formed on both the negative pressure surface 72b and the positive pressure surface 72c, but may be formed only on the negative pressure surface 72b or the positive pressure surface 72c.
- a rear edge rib 78 projecting in the axial direction from the blade surface of the blade 72 is formed at a portion of the root portion 73 on the rear edge side of the first blade meat stealing portion 74.
- the trailing edge rib 78 is formed on the negative pressure surface 72 b and the positive pressure surface 72 c of the blade 72. That is, the first blade meat stealing portion 74 and the radial rib 75 are formed in the portion near the front edge of the base portion 73 and are not formed in the portion near the rear edge.
- the first blade meat stealing portion 74 is located closer to the front edge of the blade 72 than the recessed portion 72a when the hub 71 and the blade 72 are viewed from the axial direction (arranged closest to the rear edge in FIG. 7).
- FIG. 10 is a side cross-sectional view of the mold 90 for explaining the molding process of the outdoor fan 70.
- FIG. 11 is a cross-sectional view showing the base portion 73 of the blade 72 of the mold 90 and the portion forming the vicinity thereof for explaining the molding process of the outdoor fan 70.
- an injection molding apparatus (not shown) having a mold 90 is prepared.
- the mold 90 includes a first mold 91 and a second mold 92 that is movable with respect to the first mold 91.
- the cavity 93 which comprises the shape of the outdoor fan 70 is formed by combining the 1st metal mold
- a resin is injected from the gate 94 provided in the first mold 91.
- the gate 94 is provided so as to inject the resin into the cavity 93 from a position close to the axis O of the cavity 93 (here, a portion forming the hub 71 of the outdoor fan 70).
- the resin flows from the inner peripheral portion of the cavity 93 toward the outer peripheral side, and the resin spreads into the cavity 93. At this time, the resin flows into the outer peripheral side through the portions of the cavity 93 where the blade meat stealing portions 74 and 77, the radial ribs 75 and the leading edge ribs 76 are formed.
- the outdoor fan 70 as an axial fan of the present embodiment has the following features. First, in the outdoor fan 70 of the present embodiment, as described above, the first blade meat stealing is performed such that the radial ribs 75 extending radially toward the outer peripheral side are left at the base portion 73 of the blade 72 with the hub 71. A portion 74 is formed.
- the radial rib 75 shall extend on the straight line L extended radially from the axial center O of the hub 71 toward an outer peripheral side (FIG.5 and FIG.5). 7).
- This radial rib 75 is a study of the rib shape in consideration of the inflow of the resin at the time of molding the outer peripheral side of the meat stealing portion when the inventor forms the meat stealing portion at the base portion 73 of the blade 72. It was discovered by doing. Such radial ribs 75 promote the flow of the resin injected into the mold 90 toward the outer peripheral side at the time of molding, so that the resin on the outer peripheral side of the first blade meat stealing portion 74 at the time of molding is reduced. The flow can be improved. Also, the radial rib 74 is more likely to allow the resin injected into the mold during molding to flow toward the outer peripheral side as compared with the case where the rib that does not extend radially is left. In particular, here, since the radial ribs 75 extend on the straight line L, the resin injected into the mold 90 during molding flows straight toward the outer peripheral side, and the resin moves toward the outer peripheral side. Furthermore, it is easier to flow (see FIG. 11).
- a meat stealing part can be formed in the base part 73 of the blade
- FIG. 10 a plurality of radial ribs 75 (here, four) are arranged in the circumferential direction (see FIGS. 5 and 7). For this reason, at the time of shaping
- the outdoor fan 70 of this embodiment it can further accelerate
- the front edge rib 76 that is continuous with the front edge of the blade 72 is formed in the base portion 73 on the front edge side of the blade 72 relative to the radial rib 75. ing. And the 2nd blade meat stealing part 77 larger than the 1st blade meat stealing part 74 is formed between the circumferential directions of the front edge rib 76 and the radial rib 75 (refer FIG.5 and FIG.7).
- the leading edge rib 76 is formed in order to improve the strength at the leading edge of the blade 72, and the circumferential width thereof is larger than that of the radial rib 75 (FIG. 5). And FIG. 7).
- the leading edge rib 76 and its vicinity are difficult to be cooled during molding.
- the second blade meat stealing portion 75 that is larger than the first blade meat stealing portion 74 between the front edge ribs 76 and the radial ribs 75 in the circumferential direction. Is forming. For this reason, it can suppress that it becomes difficult to cool the front edge rib 76 and its vicinity.
- the outdoor fan 70 of this embodiment although not only the radial rib 75 but the front edge rib 76 is formed, it can suppress that the sink mark at the time of shaping
- the outdoor fan 70 of this embodiment at the time of shaping
- the recess 72a is formed in order to improve the blowing performance and suppress noise, and the resin hardly flows into the recess 72a and the vicinity thereof during molding. For this reason, there exists a possibility that the molding defect of the recessed part 72a and its vicinity may generate
- the first blade meat stealing portion 74 is positioned on the front edge side of the blade 72 relative to the recessed portion 72a. For this reason, at the time of molding, the resin can flow into the recessed portion 72a and the vicinity thereof without passing through the first blade meat stealing portion 74.
- the present invention can be widely applied to an axial fan in which a hub and a plurality of blades formed so as to protrude from the outer peripheral edge of the hub are integrally molded with resin.
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Abstract
Description
このような軸流ファンとして、特許文献1(特開2011-74817号公報)に示すように、羽根のハブとの付け根部に肉盗み部が形成されたものがある。 Conventionally, in an outdoor unit or the like of an air conditioner, an axial fan in which a hub and a plurality of blades formed so as to protrude from the outer peripheral edge of the hub are integrally formed with resin has been used.
As such an axial fan, as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2011-74817), there is a fan in which a meat stealing portion is formed at the base of the blade hub.
本発明の課題は、ハブと複数の羽根とが樹脂一体成形された軸流ファンにおいて、羽根の外周部分における成形不良を抑えつつ、羽根の付け根部に肉盗み部を形成することにある。 However, forming the meat stealing portion at the base portion of the blade leads to narrowing the space in which the resin injected into the mold flows toward the outer peripheral side when the axial flow fan is formed. For this reason, in the axial fan in which the meat stealing portion is formed at the base of the blade, it is difficult for the resin to flow into the outer peripheral portion of the meat stealing portion at the time of molding, and there is a risk that molding failure may occur in the outer peripheral portion of the blade. is there.
SUMMARY OF THE INVENTION An object of the present invention is to form a meat stealing portion at the base of a blade in an axial fan in which a hub and a plurality of blades are integrally molded with a resin while suppressing molding defects at the outer peripheral portion of the blade.
本願発明者は、羽根の付け根部に肉盗み部を形成するにあたり、肉盗み部よりも外周側の部分に対する成形時の樹脂の流れ込みを考慮して、肉盗み部を形成する際に残置されるリブの形状について研究を行った。その結果、本願発明者は、上記のように、外周側に向かって放射状に延びる放射状リブが残置されるように第1羽根肉盗み部を形成することを見いだした。
このような放射状リブは、成形時に金型に注入される樹脂が外周側に向かって流れるのを促進するため、成形時における第1羽根肉盗み部よりも外周側の部分に対する樹脂の流れ込みを良好なものにすることができる。また、放射状リブは、放射状に延びていないリブを残置する場合に比べて、成形時に金型に注入される樹脂が外周側に向かって流れやすくなる。
これにより、この軸流ファンでは、羽根の外周部分における成形不良を抑えつつ、羽根の付け根部に肉盗み部を形成することができる。 The axial fan according to the first aspect is one in which a hub and a plurality of blades formed so as to protrude from the outer peripheral edge of the hub are integrally molded with resin. And the 1st blade meat stealing part is formed in the base part with the hub of a blade | wing so that the radial rib extended radially toward the outer peripheral side may remain.
The inventor of the present application, when forming the meat stealing portion at the base of the blade, is left when the meat stealing portion is formed in consideration of the flow of the resin during molding to the outer peripheral portion of the meat stealing portion. The shape of the rib was studied. As a result, the inventors of the present application have found that the first blade meat stealing portion is formed so that the radial ribs extending radially toward the outer peripheral side are left as described above.
Such radial ribs facilitate the flow of the resin injected into the mold at the time of molding toward the outer peripheral side, so that the resin can flow into the outer peripheral portion more than the first blade meat stealing portion at the time of molding. Can be made. In addition, the radial ribs make it easier for the resin injected into the mold to flow toward the outer peripheral side than when the ribs that do not extend radially are left.
Thereby, in this axial flow fan, the meat stealing portion can be formed at the base portion of the blade while suppressing the molding failure in the outer peripheral portion of the blade.
上記のように、放射状リブを周方向に複数配置すると、成形時において、第1羽根肉盗み部よりも外周側の部分に樹脂が流れる部分を周方向に増やすことができる。
これにより、この軸流ファンでは、成形時において、金型に注入される樹脂が外周側に向かって流れるのをさらに促進することができる。また、成形時において、第1羽根肉盗み部よりも外周側の部分のどの周方向位置においても、樹脂が均等に流れ込みやすくすることができる。 The axial fan according to the second aspect is the axial fan according to the first aspect, in which a plurality of radial ribs are arranged in the circumferential direction.
As described above, when a plurality of radial ribs are arranged in the circumferential direction, it is possible to increase in the circumferential direction the portion where the resin flows to the outer peripheral side of the first blade meat stealing portion during molding.
Thereby, in this axial fan, it can further accelerate | stimulate that the resin inject | poured into a metal mold | die flows toward the outer peripheral side at the time of shaping | molding. Further, at the time of molding, the resin can easily flow evenly at any circumferential position of the portion on the outer peripheral side of the first blade meat stealing portion.
上記のように、放射状リブをハブの軸心から外周側に向かって放射状に延びる直線上を延びるものにすると、成形時に金型に注入される樹脂が外周側に向かって真っ直ぐに流れるようになる。
これにより、この軸流ファンでは、成形時において、金型に注入される樹脂が外周側に向かってさらに流れやすくすることができる。 The axial fan according to the third aspect is the axial fan according to the first or second aspect, wherein the radial ribs are directed from the hub axis toward the outer peripheral side when the hub and the blades are viewed from the axial direction. It extends on a straight line extending radially.
As described above, if the radial ribs extend on a straight line extending radially from the hub axis toward the outer peripheral side, the resin injected into the mold during molding flows straight toward the outer peripheral side. .
Thereby, in this axial fan, at the time of molding, the resin injected into the mold can be further flowed toward the outer peripheral side.
上記のように、この軸流ファンでは、放射状リブよりも羽根の前縁側の部分において、羽根の前縁に連続する前縁リブを形成することによって、羽根の前縁における強度を向上させている。しかし、このような前縁リブを形成すると、成形時に前縁リブ及びその付近が冷却されにくくなるおそれがある。
そこで、この軸流ファンでは、上記のように、前縁リブを形成するとともに、前縁リブと放射状リブとの周方向間に第1羽根肉盗み部よりも大きな第2羽根肉盗み部を形成するようにして、成形時に前縁リブ及びその付近が冷却されにくくなるのを抑えるようにしている。
これにより、この軸流ファンでは、放射状リブだけでなく前縁リブが形成されているにもかかわらず、成形時のヒケが発生するのを抑えることができる。 The axial fan according to the fourth aspect is the axial fan according to any one of the first to third aspects, wherein a portion of the root portion on the leading edge side of the blade is located on the leading edge of the blade, relative to the radial rib. A continuous leading edge rib is formed. A second blade meat stealing portion larger than the first blade meat stealing portion is formed between the circumferential directions of the leading edge rib and the radial rib.
As described above, in this axial fan, the strength at the leading edge of the blade is improved by forming the leading edge rib continuous to the leading edge of the blade at the portion of the leading edge side of the blade from the radial rib. . However, if such a leading edge rib is formed, the leading edge rib and its vicinity may be difficult to be cooled during molding.
Therefore, in this axial fan, as described above, the front edge rib is formed, and the second blade meat stealing portion larger than the first blade meat stealing portion is formed between the front edge rib and the radial rib in the circumferential direction. Thus, the leading edge rib and its vicinity are prevented from becoming difficult to be cooled during molding.
Thereby, in this axial fan, although not only the radial rib but also the leading edge rib is formed, the occurrence of sink marks during molding can be suppressed.
上記のように、放射状リブを周方向に等間隔に配置すると、成形時において、複数の放射状リブに対して、樹脂が均等に流れ込みやすくなる。
これにより、この軸流ファンでは、成形時において、第1羽根肉盗み部よりも外周側の部分に樹脂が周方向にさらに均等に流れ込みやすくすることができる。 An axial fan according to a fifth aspect is the axial fan according to any one of the second to fourth aspects, wherein radial ribs are arranged at equal intervals in the circumferential direction.
As described above, when the radial ribs are arranged at equal intervals in the circumferential direction, the resin can easily flow into the plurality of radial ribs at the time of molding.
Thereby, in this axial flow fan, at the time of molding, the resin can more easily flow in the circumferential direction into the portion on the outer peripheral side than the first blade meat stealing portion.
上記のように、この軸流ファンでは、羽根の後縁において、羽根の前縁側に向かって凹んだ凹み部を形成することによって、送風性能の向上や騒音の抑制を図っている。しかし、このような凹み部を形成すると、成形時において、凹み部及びその付近に樹脂が流れ込みにくくなり、凹み部及びその付近の成形不良が発生するおそれがある。
そこで、この軸流ファンでは、上記のように、第1羽根肉盗み部が凹み部よりも羽根の前縁側に位置するようにして、成形時において、樹脂が第1羽根肉盗み部を通過することなく凹み部及びその付近まで流れ込むようにしている。
これにより、この軸流ファンでは、第1羽根肉盗み部及び凹み部の両方が形成されているにもかかわらず、成形時の凹み部及びその付近への樹脂の流れ込みを確保して、凹み部及びその付近の成形不良を抑えることができる。 In the axial fan according to the sixth aspect, in any one of the first to fifth aspects, a recessed portion that is recessed toward the front edge side of the blade is formed at the rear edge of the blade. And the 1st blade meat stealing part is located in the front edge side of a wing | blade rather than a recessed part, when a hub and a blade | wing are seen from an axial direction.
As described above, in this axial flow fan, at the trailing edge of the blade, a recessed portion that is recessed toward the front edge side of the blade is formed, thereby improving the blowing performance and suppressing noise. However, if such a dent is formed, the resin is less likely to flow into the dent and its vicinity during molding, and there is a possibility that a molding defect in the dent and its vicinity may occur.
Therefore, in this axial fan, as described above, the first blade meat stealing portion is positioned on the front edge side of the blade with respect to the recess portion, and at the time of molding, the resin passes through the first blade meat stealing portion. It flows into the dent part and the vicinity thereof without any problems.
Thereby, in this axial flow fan, although both the first blade meat stealing part and the dent part are formed, the inflow of the resin to the dent part at the time of molding and the vicinity thereof is secured, and the dent part And the molding defect of the vicinity can be suppressed.
(1)室外ユニットの全体構成
図1及び図2は、本発明の一実施形態にかかる軸流ファンとしての室外ファン70が採用された空気調和装置の室外ユニット2を示す図である。ここで、図1は、室外ユニット2の天板57を取り外した状態を示す平面図である。図2は、室外ユニット2の前面図である。尚、以下の説明において、「上」、「下」、「左」、「右」や「前面」、「側面」、「背面」、「天面」、「底面」等の方向や面を示す文言は、特にことわりのない限り、図2に示される室外ユニット2を前面とした場合における方向や面を意味する。 Hereinafter, an embodiment of an axial fan according to the present invention will be described with reference to the drawings. In addition, the specific structure of the axial fan concerning this invention is not restricted to the following embodiment, It can change in the range which does not deviate from the summary of invention. In the following description, an example in which the present invention is applied to an axial fan constituting an outdoor unit will be described. However, the present invention is not limited to this and can be applied to an axial fan used for other purposes. It is.
(1) Overall Configuration of Outdoor Unit FIGS. 1 and 2 are views showing an
底板52は、ユニットケーシング51の底面部分を構成する金属製の板状部材である。底板52の下側には、現地据付面に固定される2つの基礎脚59、60が設けられている。
送風機室側側板53は、ユニットケーシング51の送風機室S1寄りの側面部分を構成する金属製の板状部材である。送風機室側側板53は、その下部が底板52に固定されている。送風機室側側板53には、室外ファン70によってユニットケーシング51内に吸い込まれる室外空気の吸入口53aが形成されている。 The
The
The blower
送風機室側前板55は、ユニットケーシング51の送風機室S1の前面部分と、ユニットケーシング51の機械室S2の前面部分の一部とを構成する金属製の板状部材である。送風機室側前板55には、室外ファン70によってユニットケーシング51内に吸い込まれた室外空気を外部に吹き出すための吹出口55aが設けられている。吹出口55aの前側は、ファングリル55bによって覆われている。送風機室側前板55は、その下部が底板52に固定され、その左側面側の端部が送風機室側側板53の前面側の端部に固定されている。 The machine
The blower chamber side
仕切板58は、底板52上に配置される鉛直方向に延びる金属製の板状部材である。仕切板58は、ユニットケーシング51の内部空間を左右に分割することによって、左側面寄りの送風機室S1と、右側面寄りの機械室S2とを形成している。仕切板58は、その前後方向の中央部分が送風機室S1側に突出するように湾曲した形状をなしている。仕切板58は、その下部が底板52に固定され、その前面側の端部が送風機室側前板55に固定され、その背面側の端部が室外熱交換器24の機械室S2側の端部に固定されている。
室外ファン70は、主として、ハブ71と、ハブ71の外周から突出するように形成された複数(ここでは、3枚)の羽根72とが樹脂一体成形されたプロペラファンである。室外ファン70は、送風機室S1内において、ユニットケーシング51の前面に対向するように設けられている。より具体的には、室外ファン70は、室外熱交換器24の前面側の位置において、送風機室側前板55に形成された吹出口55aに対向するように設けられている。ここでは、羽根72の後縁には、送風性能の向上や騒音の抑制のために、羽根72の前縁側に向かって凹んだ凹み部72aが形成されている。室外ファン70は、室外ファン70と室外熱交換器24との前後方向間に配置されたファンモータ79によって回転駆動される。ファンモータ79は、天板57と底板52との間を鉛直方向に延びるファンモータ台61によって支持されている。尚、室外ファン70の詳細な構成については、後述する。 The
The
The
室外熱交換器24は、略L字形状の熱交換器パネルであり、送風機室S1内において、ユニットケーシング51の左側面及び背面に沿うように底板52上に配置されている。
圧縮機21は、縦型円筒形状の密閉式圧縮機であり、機械室S2内に配置されている。 The
The
The
(2)室外ファンの詳細構成
次に、図3~図9を用いて、本実施形態にかかる軸流ファンとしての室外ファン70の詳細な構成について説明する。ここで、図3は、室外ファン70の斜視図である。図4は、室外ファン70の正圧面側平面図である。図5は、室外ファン70の負圧面側平面図である。図6は、室外ファン70の側面図である。図7は、羽根72の付け根部73及びその付近の拡大図である。図8は、図7のI-I断面図である。図9は、図6の前縁リブ76及びその付近の拡大図である。尚、以下の説明において、室外ファン70の軸心(回転中心)を軸心Oとし、その軸線を回転軸線O-Oとする。 In addition, although illustration is abbreviate | omitted here, refrigerant circuit components, such as apparatuses other than the
(2) Detailed Configuration of Outdoor Fan Next, a detailed configuration of the
羽根72は、前進及び前傾した羽根形状を有している(図4及び図5参照)。そして、羽根72の肉厚は、ハブ71との付け根部73において大きくなっており、外周側に向かうにつれて小さくなっている(図9参照)。羽根72の後縁に形成された凹み部72aは、付け根部73よりも外周側に配置されている(図3、図5及び図7参照)。ここで、室外ファン70を回転させたときに空気が流入する側(空気の流通方向の上流側)の面を負圧面72bとし、その反対側(空気の流通方向の下流側)の面を正圧面72cとする。 As described above, the
The blade |
具体的には、羽根肉盗み部74、77は、羽根72の負圧面72bに形成されている。尚、羽根肉盗み部74、77は、負圧面72bに形成されるものではなく、正圧面72cだけに形成されていてもよいし、負圧面72b及び正圧面72cの両面に形成されていてもよい。
放射状リブ75は、付け根部73と同等の肉厚を有しており、その軸方向端部が羽根72の翼面になめらかに連続している(図8及び図9参照)。放射状リブ75は、周方向に複数(ここでは、4つ)並んで配置されている。すなわち、第1羽根肉盗み部74は、羽根72の後縁側から前縁側に向かって、放射状リブ75の周方向両側に位置するように、複数(ここでは、4つ)配置されている。そして、第2羽根肉盗み部77は、複数の放射状リブ75のうち最も前縁側に配置されている放射状リブ75の周方向前縁側に配置されている。このため、第1羽根肉盗み部74を周方向に挟んで隣り合う2つの放射状リブ75は、その軸方向端部がなめらかに連続している。尚、放射状リブ75の数は、4つに限定されるものではなく、3つ以下や5つ以上でもよい。 A first blade
Specifically, the
The
これに対して、第2羽根肉盗み部77と第1羽根肉盗み部74との間の周方向の間隔は、第1羽根肉盗み部74間の周方向の間隔よりも大きくなっている(図5及び図7参照)。すなわち、第2羽根肉盗み部77は、同じ径方向位置における周方向寸法が第1羽根肉盗み部74よりも大きくなっている。
また、前縁リブ76は、羽根72の前縁における強度を向上させるために、付け根部73の前縁において、羽根72の翼面から軸方向に突出するように形成されている。前縁リブ76は、ここでは、略三角柱形状を有しており、羽根72の負圧面72b及び正圧面72cの両方に形成されている。前縁リブ76の周方向の幅は、同じ径方向位置における放射状リブ75の周方向の幅よりも大きくなっている(図5及び図7参照)。前縁リブ76のハブ71寄りの部分には、ハブ71及び羽根72を軸方向から見た際に略三角形状の窪み76aが形成されている。尚、前縁リブ76は、負圧面72b及び正圧面72cの両面に形成されるものではなく、負圧面72b又は正圧面72cだけに形成されていてもよい。 Further, the
In contrast, the circumferential interval between the second feather
The
(3)室外ファンの成形
次に、図10及び図11を用いて、本実施形態にかかる軸流ファンとしての室外ファン70の成形工程について説明する。ここで、図10は、室外ファン70の成形工程を説明するための金型90の側面断面図である。図11は、室外ファン70の成形工程を説明するための金型90の羽根72の付け根部73及びその付近を形成する部分を示す断面図である。 Further, a
(3) Molding of outdoor fan Next, the molding process of the
次に、第1金型91に設けられた湯口94から樹脂を注入する。湯口94は、キャビティ93の軸心Oに近い位置(ここでは、室外ファン70のハブ71を形成する部分)から樹脂をキャビティ93内に注入するように設けられている。すると、樹脂がキャビティ93の内周部分から外周側に向かって流れて、樹脂がキャビティ93内に行き渡る。このとき、樹脂は、キャビティ93のうち羽根肉盗み部74、77、放射状リブ75及び前縁リブ76を形成する部分等を通過して外周側に流れ込むことになる。 First, an injection molding apparatus (not shown) having a
Next, a resin is injected from the
次に、第1金型91と第2金型92との組み合わせを解除することによって金型90の型開きを行う。そして、成形された室外ファン70を金型90から取り出す。
(4)室外ファンの特徴
本実施形態の軸流ファンとしての室外ファン70には、以下のような特徴がある。
まず、本実施形態の室外ファン70では、上記のように、羽根72のハブ71との付け根部73に、外周側に向かって放射状に延びる放射状リブ75が残置されるように第1羽根肉盗み部74を形成している。ここでは、放射状リブ75は、ハブ71及び羽根72を軸方向から見た際に、ハブ71の軸心Oから外周側に向かって放射状に延びる直線L上を延びるものとしている(図5及び図7参照)。 Next, the
Next, the
(4) Features of outdoor fan The
First, in the
このような放射状リブ75は、成形時に金型90に注入される樹脂が外周側に向かって流れるのを促進するため、成形時における第1羽根肉盗み部74よりも外周側の部分に対する樹脂の流れ込みを良好なものにすることができる。また、放射状リブ74は、放射状に延びていないリブを残置する場合に比べて、成形時に金型に注入される樹脂が外周側に向かって流れやすくなる。特に、ここでは、放射状リブ75を直線L上を延びるものにしているため、成形時に金型90に注入される樹脂が外周側に向かって真っ直ぐに流れるようになり、樹脂が外周側に向かってさらに流れやすくなっている(図11参照)。 This
Such
また、本実施形態の室外ファン70では、上記のように、放射状リブ75を周方向に複数(ここでは、4つ)配置している(図5及び図7参照)。
このため、成形時において、第1羽根肉盗み部74よりも外周側の部分に樹脂が流れる部分を周方向に増やすことができる(図11参照)。
これにより、本実施形態の室外ファン70では、成形時において、金型90に注入される樹脂が外周側に向かって流れるのをさらに促進することができる。また、成形時において、第1羽根肉盗み部74よりも外周側の部分のどの周方向位置においても、樹脂が均等に流れ込みやすくすることができる。 Thereby, in the
Further, in the
For this reason, at the time of shaping | molding, the part which resin flows into the part of the outer peripheral side rather than the 1st blade
Thereby, in the
ここで、前縁リブ76は、上記のように、羽根72の前縁における強度を向上させるために形成したものであり、その周方向の幅が放射状リブ75よりも大きくなっている(図5及び図7参照)。このため、成形時に前縁リブ76及びその付近が冷却されにくくなるおそれがある。
これに対して、本実施形態の室外ファン70では、上記のように、前縁リブ76と放射状リブ75との周方向間に第1羽根肉盗み部74よりも大きな第2羽根肉盗み部75を形成している。このため、前縁リブ76及びその付近の冷却されにくくなるのが抑えることができる。 Further, in the
Here, as described above, the leading
In contrast, in the
また、本実施形態の室外ファン70では、放射状リブ70を、周方向に等間隔に配置している(図5及び図7参照)。
このため、成形時において、複数(ここでは、4つ)の放射状リブ75に対して、樹脂が均等に流れ込みやすくなる(図11参照)。
これにより、本実施形態の室外ファン70では、成形時において、第1羽根肉盗み部74よりも外周側の部分に樹脂が周方向にさらに均等に流れ込みやすくすることができる。
さらに、本実施形態の室外ファン70では、羽根72の後縁に、羽根72の前縁側に向かって凹んだ凹み部72aを形成している。そして、第1羽根肉盗み部74は、ハブ71及び羽根72を軸方向から見た際に、凹み部72aよりも羽根72の前縁側に位置している(図7参照)。 Thereby, in the
Further, in the
For this reason, at the time of shaping | molding, resin becomes easy to flow equally with respect to several (here four) radial ribs 75 (refer FIG. 11).
Thereby, in the
Furthermore, in the
これに対して、本実施形態の室外ファン70では、上記のように、第1羽根肉盗み部74が凹み部72aよりも羽根72の前縁側に位置するようにしている。このため、成形時において、樹脂が第1羽根肉盗み部74を通過することなく凹み部72a及びその付近まで流れ込むようにすることができる。
これにより、本実施形態の室外ファン70では、第1羽根肉盗み部74及び凹み部72aの両方が形成されているにもかかわらず、成形時の凹み部72a及びその付近への樹脂の流れ込みを確保して、凹み部72a及びその付近の成形不良を抑えることができる。 Here, as described above, the
On the other hand, in the
Thereby, in the
71 ハブ
72 羽根
72a 凹み部
73 付け根部
74 第1羽根肉盗み部
75 放射状リブ
76 前縁リブ
77 第2羽根肉盗み部 70
Claims (6)
- ハブ(71)と前記ハブの外周縁から突出するように形成された複数の羽根(72)とが樹脂一体成形された軸流ファンにおいて、
前記羽根の前記ハブとの付け根部(73)には、外周側に向かって放射状に延びる放射状リブ(75)が残置されるように第1羽根肉盗み部(74)が形成されている、
軸流ファン(70)。 In the axial fan in which the hub (71) and a plurality of blades (72) formed so as to protrude from the outer peripheral edge of the hub are integrally molded with resin,
A first blade meat stealing portion (74) is formed at the base portion (73) of the blade with the hub so that radial ribs (75) extending radially toward the outer peripheral side are left.
An axial fan (70). - 前記放射状リブ(75)は、周方向に複数配置されている、
請求項1に記載の軸流ファン(70)。 A plurality of the radial ribs (75) are arranged in the circumferential direction,
The axial fan (70) according to claim 1. - 前記放射状リブ(75)は、前記ハブ(71)及び前記羽根(72)を軸方向から見た際に、前記ハブの軸心から外周側に向かって放射状に延びる直線上を延びている、
請求項1又は2に記載の軸流ファン(70)。 The radial rib (75) extends on a straight line extending radially from the axial center of the hub toward the outer peripheral side when the hub (71) and the blade (72) are viewed from the axial direction.
The axial fan (70) according to claim 1 or 2. - 前記付け根部(73)のうち前記放射状リブ(75)よりも前記羽根(72)の前縁側の部分には、前記羽根の前縁に連続する前縁リブ(76)が形成されており、
前記前縁リブと前記放射状リブとの周方向間には、前記第1羽根肉盗み部(74)よりも大きい第2羽根肉盗み部(77)が形成されている、
請求項1~3のいずれかに記載の軸流ファン(70)。 A leading edge rib (76) continuous to the leading edge of the blade is formed in a portion of the root portion (73) on the leading edge side of the blade (72) with respect to the radial rib (75).
Between the circumferential direction of the front edge rib and the radial rib, a second blade meat stealing portion (77) larger than the first blade meat stealing portion (74) is formed,
The axial fan (70) according to any one of claims 1 to 3. - 前記放射状リブ(75)は、周方向に等間隔に配置されている、
請求項2~4のいずれか1項に記載の軸流ファン(70)。 The radial ribs (75) are arranged at equal intervals in the circumferential direction,
The axial fan (70) according to any one of claims 2 to 4. - 前記羽根(72)の後縁には、前記羽根の前縁側に向かって凹んだ凹み部(72a)が形成されており、
前記第1羽根肉盗み部(74)は、前記ハブ(71)及び前記羽根(72)を軸方向から見た際に、前記凹み部よりも前記羽根の前縁側に位置している、
請求項1~5のいずれか1項に記載の軸流ファン(70)。 On the rear edge of the blade (72), a recess (72a) is formed that is recessed toward the front edge of the blade.
The first blade meat stealing portion (74) is located on the front edge side of the blade from the recessed portion when the hub (71) and the blade (72) are viewed from the axial direction.
The axial fan (70) according to any one of claims 1 to 5.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020147016654A KR20140093282A (en) | 2011-11-21 | 2012-10-05 | Axial flow fan |
CN201280056427.2A CN103946557A (en) | 2011-11-21 | 2012-10-05 | Axial flow fan |
AU2012341788A AU2012341788A1 (en) | 2011-11-21 | 2012-10-05 | Axial-flow fan |
EP12851147.4A EP2784328A1 (en) | 2011-11-21 | 2012-10-05 | Axial flow fan |
US14/359,178 US20140341748A1 (en) | 2011-11-21 | 2012-10-05 | Axial-flow fan |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2011254456A JP5353994B2 (en) | 2011-11-21 | 2011-11-21 | Axial fan |
JP2011-254456 | 2011-11-21 |
Publications (1)
Publication Number | Publication Date |
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WO2013077095A1 true WO2013077095A1 (en) | 2013-05-30 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/075924 WO2013077095A1 (en) | 2011-11-21 | 2012-10-05 | Axial flow fan |
Country Status (7)
Country | Link |
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US (1) | US20140341748A1 (en) |
EP (1) | EP2784328A1 (en) |
JP (1) | JP5353994B2 (en) |
KR (1) | KR20140093282A (en) |
CN (1) | CN103946557A (en) |
AU (1) | AU2012341788A1 (en) |
WO (1) | WO2013077095A1 (en) |
Cited By (1)
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---|---|---|---|---|
JP2021177080A (en) * | 2017-08-09 | 2021-11-11 | 三菱電機株式会社 | Air blower and refrigeration cycle device |
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US10767656B2 (en) * | 2014-08-07 | 2020-09-08 | Mitsubishi Electric Corporation | Axial flow fan and air-conditioning apparatus having axial flow fan |
CN104929968B (en) * | 2015-07-03 | 2017-06-16 | 浙江大学 | A kind of carbon fibre composite axial flow fan vane wheel |
KR102600955B1 (en) * | 2016-09-21 | 2023-11-13 | 삼성전자주식회사 | Propeller fan and air conditioner having the same |
JP6926428B2 (en) * | 2016-09-27 | 2021-08-25 | 株式会社富士通ゼネラル | Axial fan and outdoor unit using it |
USD858737S1 (en) * | 2017-03-16 | 2019-09-03 | Mitsubishi Electric Corporation | Propeller fan |
JP7113819B2 (en) * | 2017-05-25 | 2022-08-05 | 三菱電機株式会社 | Propeller fan and refrigeration cycle device |
CN107489646B (en) * | 2017-08-02 | 2024-01-12 | 奥克斯空调股份有限公司 | Sawtooth type noise-reducing axial flow fan blade |
USD870254S1 (en) * | 2017-08-09 | 2019-12-17 | Mitsubishi Electric Corporation | Propeller fan |
JP1600722S (en) * | 2017-08-09 | 2018-04-02 | ||
JP1600724S (en) * | 2017-08-09 | 2018-04-02 | ||
USD860427S1 (en) | 2017-09-18 | 2019-09-17 | Horton, Inc. | Ring fan |
JP6931776B2 (en) * | 2018-03-28 | 2021-09-08 | パナソニックIpマネジメント株式会社 | Axial fan |
JP2020012461A (en) * | 2018-07-09 | 2020-01-23 | パナソニックIpマネジメント株式会社 | Impeller and axial flow fan |
US11767761B2 (en) | 2018-08-02 | 2023-09-26 | Horton, Inc. | Low solidity vehicle cooling fan |
JP7071682B1 (en) * | 2021-01-21 | 2022-05-19 | ダイキン工業株式会社 | Axial flow fan and air conditioner |
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JP2000320493A (en) * | 1999-05-12 | 2000-11-21 | Daikin Ind Ltd | Fan and manufacture thereof |
JP2001115995A (en) * | 1999-10-20 | 2001-04-27 | Daikin Ind Ltd | Impeller for axial flow fan |
JP2004124748A (en) * | 2002-09-30 | 2004-04-22 | Toshiba Kyaria Kk | Axial fan |
JP2005140081A (en) * | 2003-11-10 | 2005-06-02 | Toshiba Kyaria Kk | Propeller fan and air-conditioner outdoor unit using the same |
JP2011074817A (en) | 2009-09-30 | 2011-04-14 | Sanyo Electric Co Ltd | Axial fan |
-
2011
- 2011-11-21 JP JP2011254456A patent/JP5353994B2/en not_active Expired - Fee Related
-
2012
- 2012-10-05 CN CN201280056427.2A patent/CN103946557A/en not_active Withdrawn
- 2012-10-05 EP EP12851147.4A patent/EP2784328A1/en not_active Withdrawn
- 2012-10-05 WO PCT/JP2012/075924 patent/WO2013077095A1/en active Application Filing
- 2012-10-05 AU AU2012341788A patent/AU2012341788A1/en not_active Withdrawn
- 2012-10-05 KR KR1020147016654A patent/KR20140093282A/en not_active Application Discontinuation
- 2012-10-05 US US14/359,178 patent/US20140341748A1/en not_active Abandoned
Patent Citations (5)
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JP2000320493A (en) * | 1999-05-12 | 2000-11-21 | Daikin Ind Ltd | Fan and manufacture thereof |
JP2001115995A (en) * | 1999-10-20 | 2001-04-27 | Daikin Ind Ltd | Impeller for axial flow fan |
JP2004124748A (en) * | 2002-09-30 | 2004-04-22 | Toshiba Kyaria Kk | Axial fan |
JP2005140081A (en) * | 2003-11-10 | 2005-06-02 | Toshiba Kyaria Kk | Propeller fan and air-conditioner outdoor unit using the same |
JP2011074817A (en) | 2009-09-30 | 2011-04-14 | Sanyo Electric Co Ltd | Axial fan |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2021177080A (en) * | 2017-08-09 | 2021-11-11 | 三菱電機株式会社 | Air blower and refrigeration cycle device |
JP7199481B2 (en) | 2017-08-09 | 2023-01-05 | 三菱電機株式会社 | Air blower and refrigeration cycle device |
Also Published As
Publication number | Publication date |
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JP5353994B2 (en) | 2013-11-27 |
AU2012341788A1 (en) | 2014-06-26 |
KR20140093282A (en) | 2014-07-25 |
US20140341748A1 (en) | 2014-11-20 |
EP2784328A1 (en) | 2014-10-01 |
JP2013108442A (en) | 2013-06-06 |
CN103946557A (en) | 2014-07-23 |
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