WO2021019710A1 - プロペラファンの羽根車、送風機、および空気調和機の室外機 - Google Patents

プロペラファンの羽根車、送風機、および空気調和機の室外機 Download PDF

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Publication number
WO2021019710A1
WO2021019710A1 PCT/JP2019/029948 JP2019029948W WO2021019710A1 WO 2021019710 A1 WO2021019710 A1 WO 2021019710A1 JP 2019029948 W JP2019029948 W JP 2019029948W WO 2021019710 A1 WO2021019710 A1 WO 2021019710A1
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WO
WIPO (PCT)
Prior art keywords
propeller fan
erection wall
impeller
suction
suction side
Prior art date
Application number
PCT/JP2019/029948
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
壮軌 齊藤
佳輝 田畑
佑介 深澤
Original Assignee
東芝キヤリア株式会社
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 東芝キヤリア株式会社 filed Critical 東芝キヤリア株式会社
Priority to PCT/JP2019/029948 priority Critical patent/WO2021019710A1/ja
Priority to JP2021536533A priority patent/JP7245339B2/ja
Priority to CN201980098803.6A priority patent/CN114207290B/zh
Priority to EP19939652.4A priority patent/EP4006355A4/en
Publication of WO2021019710A1 publication Critical patent/WO2021019710A1/ja

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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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
    • 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved
    • F05D2250/712—Shape curved concave
    • 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
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F05D2270/11—Purpose of the control system to prolong engine life
    • F05D2270/114—Purpose of the control system to prolong engine life by limiting mechanical stresses

Definitions

  • An embodiment of the present invention relates to an impeller of a propeller fan, a blower, and an outdoor unit of an air conditioner.
  • a propeller fan is used as a blower for the outdoor unit of the air conditioner.
  • the propeller fan includes an impeller and an electric motor that generates a rotational driving force for the impeller.
  • the impeller includes a tubular boss portion and a plurality of blade portions that project radially from the outer peripheral surface of the boss portion.
  • the boss portion is a shaft mounting portion provided with a rotating shaft connecting the electric motor and the propeller fan, a plurality of ribs extending radially from the outer peripheral surface of the shaft mounting portion to the inner wall of the boss portion, and a downstream side connecting the plurality of ribs. It includes an erection wall portion and an upstream erection wall portion that connects a plurality of ribs on the upstream side of the downstream erection wall portion.
  • the downstream erection wall and the upstream erection wall do not overlap in the direction along the rotation center line of the propeller fan.
  • the upstream side erection wall portion is provided on the axial side of the base end portion of the front edge of the blade portion.
  • an object of the present invention is to provide an impeller of a propeller fan capable of more effectively relieving stress concentration at the connection portion between the root portion of the front edge of the blade portion and the boss portion.
  • the impeller of the propeller fan includes a boss portion and a plurality of blade portions that project radially from the outer peripheral surface of the boss portion, and the boss portion has the outer peripheral surface. It has a tubular portion extending from the suction side end to the blowout side end, a surface facing the direction along the center line of the tubular portion, and has a connecting portion continuous with the suction side end and extends inward of the tubular portion.
  • a plurality of suction-side erection wall portions a plurality of surfaces facing the direction along the center line of the cylinder portion, closer to the blow-out side end than the suction-side erection wall portion, and extending inward of the cylinder portion.
  • a blowout side erection wall portion is provided, and the root portion of the front edge of each of the blade portions is continuous with the suction side end.
  • blower according to the embodiment of the present invention includes the propeller fan and an electric motor for driving the propeller fan.
  • the outdoor unit of the air conditioner includes the blower and a heat exchanger that exchanges heat with the air flowing by the blower.
  • the vertical sectional view of the second example of the impeller of the propeller fan which concerns on embodiment of this invention.
  • FIG. 1 A perspective view of a third example of an impeller of a propeller fan according to an embodiment of the present invention as viewed from the outlet side.
  • FIGS. 1 to 11 An embodiment of an impeller of a propeller fan, a blower, and an outdoor unit of an air conditioner according to the present invention will be described with reference to FIGS. 1 to 11.
  • the same or corresponding configurations are designated by the same reference numerals.
  • FIG. 1 is a cross-sectional view of an outdoor unit of an air conditioner according to an embodiment of the present invention.
  • the air conditioner includes an outdoor unit 100 and an indoor unit (not shown).
  • the outdoor unit 100 includes a housing 101, a blower 103 including an electric motor 102 inside the housing 101, a heat exchanger 105, a compressor 106, a four-way valve (not shown), and a controller (not shown). , Is equipped.
  • the housing 101 includes a side plate 111 that covers the side surface, a top plate 112 that covers the ceiling, and a bottom plate 113 that covers the bottom surface.
  • a partition plate 115 is provided inside the housing 101. The partition plate 115 divides the inside of the housing 101 into a machine room 117 and a heat exchange room 118.
  • the side plate 111 has a plurality of suction holes 111a for sucking outside air into the outdoor unit 100.
  • an outlet hole 112a and a bell mouth (not shown) for exhausting the outside air sucked into the outdoor unit 100 from the suction hole 111a of the side plate 111 to the outside of the outdoor unit 100 are provided. ..
  • the compressor 106 is installed on the bottom plate 113 of the machine room 117. Further, the compressor 106 is arranged below the heat exchanger 105.
  • the heat exchanger 105 is installed in the central part of the heat exchange chamber 118.
  • the blower 103 is located above the heat exchanger 105 and is installed near the exhaust hole 111a of the top plate 112.
  • the outdoor unit 100 is connected to the indoor unit via a refrigerant pipe (not shown).
  • the compressor 106 is driven when the refrigeration cycle operation is started.
  • the compressor 106 circulates the refrigerant through the refrigerant pipe and guides the refrigerant to the heat exchanger 105.
  • the operation of the blower 103 is started.
  • the electric motor 102 rotationally drives the propeller fan 1.
  • the outside air is guided to the heat exchange chamber 118 from the suction hole 111a on the side surface of the housing 101, passes through the heat exchanger 105, and exchanges heat with the refrigerant in the heat exchanger 105.
  • the air heat-exchanged by the heat exchanger 105 is guided by the bell mouth via the blower 103, and is discharged to the outside of the outdoor unit 100 from the blowout hole 112a above the housing 100.
  • FIG. 2 is a perspective view of the impeller of the propeller fan according to the embodiment of the present invention as viewed from the suction side.
  • FIG. 3 is a perspective view of the impeller of the propeller fan according to the embodiment of the present invention as viewed from the outlet side.
  • the propeller fan 1 As shown in FIGS. 2 and 3, the propeller fan 1 according to the present embodiment rotates in the rotation direction R indicated by the solid arrow in FIGS. 2 and 3, and the flow indicated by the solid arrow in FIGS. 2 and 3. Fluid, exclusively air, flows in the direction F.
  • the propeller fan 1 is applied to, for example, an outdoor unit of an air conditioner, and is used for blowing air to an outdoor heat exchanger.
  • the propeller fan 1 is a so-called axial fan.
  • the propeller fan 1 includes an impeller 2 and an electric motor (not shown) for rotationally driving the impeller 2.
  • the electric motor is equipped with an output shaft (not shown) that transmits rotational driving force to the impeller 2.
  • the output shaft is the center of rotation of the impeller 2.
  • FIG. 4 is a vertical sectional view of an impeller of a propeller fan according to an embodiment of the present invention.
  • the impeller 2 of the propeller fan 1 is a so-called axial flow impeller.
  • the impeller 2 is also simply called a propeller.
  • the impeller 2 includes a boss portion 5 and a plurality of blade portions 6 that project radially from the outer peripheral surface 5a of the boss portion 5.
  • the impeller 2 is integrally molded with, for example, resin.
  • the plurality of blade portions 6 are arranged at equal intervals along the outer peripheral surface 5a of the boss portion 5 in the circumferential direction of the impeller 2, that is, in the rotation direction R of the propeller fan 1.
  • the impeller 2 includes, for example, three blade portions 6. In this case, the three blades 6 are arranged at every 120 degree central angle.
  • Each of the blade portions 6 is inclined toward the suction side in the rotation direction of the propeller fan 1 and is arranged on the outer peripheral surface 5a of the boss portion 5.
  • the root portion 31a of the front edge portion 31 of the blade portion 6 coincides with the suction side end 11s of the boss portion 5.
  • the boss portion 5 has a tubular portion 11 having an outer peripheral surface 5a of the boss portion 5 and extending from the suction side end 11s to the blowout side end 11b, and a suction side end surface 12a facing the direction along the center line of the tubular portion 11.
  • a plurality of suction-side erection wall portions 12 having a connecting portion 12b continuous with the suction-side end 11s of the boss portion 5 and extending toward the center of the cylinder portion 11 and facing the direction along the center line of the cylinder portion 11.
  • a plurality of blow-out side erection wall portions 13 having a blow-out side end surface 13a and closer to the blow-out side end 11b than the suction-side erection wall portion 12 and extending toward the center of the tubular portion 11, and a plurality of suction-side erection wall portions.
  • a rotating shaft mounting portion 15 provided at the center of the tubular portion 11 via the 12 and a plurality of blowing-side erection wall portions 13 is provided.
  • the rotating shaft mounting portion 15 is arranged on the rotating center line of the boss portion 5 and on the rotating center line of the impeller 2.
  • a rotating shaft is fixed to the rotating shaft mounting portion 15.
  • the impeller 2 is connected to the electric motor via a rotating shaft mounting portion 15 fixed to the rotating shaft.
  • the rotary shaft mounting portion 15 may be one that fixes the inserted rotary shaft, or may be one that is integrated with the rotary shaft by insert molding.
  • the plurality of suction-side erection wall portions 12 are flat plate portions having a substantially uniform thickness extending from the suction-side end 11s of the cylinder portion 11 toward the center of the cylinder portion 11.
  • Each suction-side erection wall portion 12 has a front end 16 located forward in the rotation direction R of the propeller fan 1 and a rear end 17 located behind the front end 16. The outer edge of each suction-side erection wall portion 12 is continuously connected to the suction-side end 11s of the tubular portion 11.
  • the plurality of blow-out side erection wall portions 13 are flat plate portions having a substantially uniform thickness extending from the blow-out side end 11b of the cylinder portion 11 toward the center of the cylinder portion 11.
  • Each of the blowout side erection wall portions 13 has a front end 18 located forward in the rotation direction R of the propeller fan 1 and a rear end 19 located behind the front end 18.
  • the outer edge of each of the blow-out side erection wall portions 13 is continuous with the blow-out side end 11b of the tubular portion 11.
  • the outer edge of the blowout side erection wall portion 13 may be located inside the tubular portion 11 and may not be continuous with the blowout side end 11b.
  • the plurality of suction side erection wall portions 12 and the plurality of outlet side erection wall portions 13 are alternately arranged in the rotation direction R of the propeller fan 1.
  • the plurality of suction-side erection wall portions 12 and the plurality of outlet-side erection wall portions 13 do not overlap in the direction along the rotation center line of the propeller fan 1.
  • the same number of suction-side erection wall portions 12, blow-out side erection wall portions 13, and blade portions 6 are provided.
  • the suction side erection wall portion 12, the blowout side erection wall portion 13, and the blade portion 6 are regularly arranged around the rotation center of the propeller fan 1.
  • suction side erection wall portion 12 the blowout side erection wall portion 13, and the blade portion 6 are provided by three as in the present embodiment
  • a plurality of suction side erection wall portions 12 and a plurality of blowouts are provided.
  • the positional relationship and the dimensional relationship between the side erection wall portion 13 and the plurality of blade portions 6 are the same every 120 degrees around the rotation center of the propeller fan 1.
  • a vertical wall portion 21 extending in the direction of the rotation center line of the propeller fan 1 is provided between the suction side erection wall portion 12 and the blowout side erection wall portion 13 adjacent to each other in the direction of the rotation center line of the propeller fan 1.
  • the longitudinal wall portion 21 has a substantially uniform thickness.
  • Half of the vertical wall portions 21 are composed of the rear end 17 of each suction side erection wall portion 12 and the front edge 18 of each outlet side erection wall portion 13, and the other vertical wall portions 21 are each It is composed of a front end 16 of a suction side erection wall portion 12 and a trailing edge 19 of each outlet side erection wall portion 13.
  • the vertical wall portion 21 is bridged between the inner peripheral surface 11a of the tubular portion 11 and the rotating shaft mounting portion 15.
  • the plurality of vertical wall portions 21 extend radially from the rotating shaft mounting portion 15 to the tubular portion 11.
  • the suction side erection wall portion 12 extends over the suction side end 21s of the adjacent vertical wall portions 21, the suction side end 11s of the tubular portion 11, and the suction side end 15s of the rotary shaft mounting portion 15, and is mounted on the rotary shaft. It spreads in a fan shape from the portion 15 toward the suction side end 11s of the tubular portion 11.
  • the rotating shaft mounting portion 15 is a key point of the fan-shaped suction side erection wall portion 12.
  • the blow-out side erection wall portion 13 extends over the blow-out side end 21b of the adjacent vertical wall portions 21, the blow-out side end 11b of the tubular portion 11, and the blow-out side end 15b of the rotary shaft mounting portion 15, and the rotary shaft mounting portion 15 It extends in a fan shape from the outlet side end 15b toward the outlet side erection wall portion of the tubular portion 11.
  • the rotating shaft mounting portion 15 is a key point of the fan-shaped blowing-side erection wall portion 13. That is, the plurality of suction side erection wall portions 12 and the plurality of outlet side erection wall portions 13 are alternately and radially arranged around the rotating shaft mounting portion 15.
  • the rear end 17 of the connecting portion 12b of the suction side erection wall portion 12 is located behind the root portion 31a of the front edge 31 of the nearest blade portion 6 in the rotation direction of the propeller fan 1.
  • the rear end 17 of the suction side erection wall portion 12 is located behind the root portion 31a of the front edge 31 of the nearest blade portion 6.
  • the front end 16 of the connecting portion 12b of the suction side erection wall portion 12 may coincide with the root portion 31a of the front edge 31 of the nearest blade portion 6 in the rotation direction of the propeller fan 1, or may coincide with the root portion 31a of the closest blade portion 6. It may be located behind the root portion 31a of the front edge 31, or may be located before the root portion 31a of the front edge 31 of the nearest blade portion 6. In FIG. 2, the front end 16 of the suction side erection wall portion 12 is located in front of the root portion 31a of the front edge 31 of the nearest blade portion 6.
  • the root portion 31a of the front edge 31 of the blade portion 6 is sandwiched between the front end 16 and the rear end 17 of the connecting portion 12b of the suction side erection wall portion 12.
  • the front end 16 and the rear end 17 of the suction side erection wall portion 12 sandwich the root portion 31a of the front edge 31 of the blade portion 6.
  • the root portion 31a of the front edge 31 of each blade portion 6 is continuous with the suction side end 11s of the tubular portion 11. That is, the root portion 31a of the front edge 31 of the blade portion 6 and the outermost edge of the suction side erection wall portion 12 sandwich the suction side end 11s of the cylinder portion 11 between them without being offset in the rotation direction of the propeller fan 1. Facing at.
  • the impeller 2 is continuous with the root portion 31a of the front edge 31 of the blade portion 6 continuous with the suction side end 11s of the tubular portion 11 and the suction side end 11s of the tubular portion 11. It is provided with a suction side erection wall portion 12. Therefore, the impeller 2 distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5, the suction side erection wall portion 12, and the longitudinal wall portion 21 to distribute the blades. The stress concentration at the root portion 31a of the front edge 31 of the portion 6 is relaxed.
  • the suction side end 11s of the tubular portion 11 is not between the root portion 31a of the front edge 31 of the blade portion 6 and the outermost edge of the suction side erection wall portion 12, but protrudes toward the suction side of the propeller fan 1 to provide blades.
  • the ratio of the load dispersed by the suction side erection wall portion 12 decreases. .. That is, the improvement of the stress concentration at the root portion 31a of the front edge 31 of the blade portion 6 remains insufficient.
  • the rear end 17 of the suction side erection wall portion 12 is located in front of the root portion 31a of the front edge 31 of the blade portion 6 closest to the suction side erection wall portion 12, and the front edge 31 of the blade portion 6 is located.
  • the suction side erection wall When the front end 16 of the portion 12 is located behind the root portion 31a of the front edge 31 of the blade portion 6 closest to the blade portion 6, the suction side erection wall portion 12 is generated at the root portion 31a of the front edge 31 of the blade portion 6.
  • the load to be applied is applied as intended to relax the stress concentration at the root portion 31a of the front edge 31 of the blade portion 6.
  • the rear end 17 of the suction side erection wall portion 12 is located behind the root portion 31a of the front edge 31 of the nearest blade portion 6 in the rotation direction R of the propeller fan 1. doing. Therefore, the impeller 2 distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12, and the front edge 31 of the blade portion 6 The stress concentration at the root portion 31a is relaxed.
  • the impeller 2 according to the present embodiment includes a root portion 31a of the front edge 31 of the blade portion 6 sandwiched between the front end 16 and the rear end 17 of the suction side erection wall portion 12. Therefore, the impeller 2 distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12, and the front edge 31 of the blade portion 6 The stress concentration at the root portion 31a is more effectively relaxed.
  • the impeller 2 according to the present embodiment includes a suction side erection wall portion 12 and a blowout side erection wall portion 13 that do not overlap in the direction along the rotation center line of the propeller fan 1. Therefore, the impeller 2 can be easily integrally molded by a mold that can be divided in the direction of the rotation center line.
  • FIG. 5 is a perspective view of a second example of the impeller of the propeller fan according to the embodiment of the present invention as viewed from the suction side.
  • FIG. 6 is a perspective view of a second example of an impeller of a propeller fan according to an embodiment of the present invention as viewed from the outlet side.
  • FIG. 7 is a vertical sectional view of a second example of an impeller of a propeller fan according to an embodiment of the present invention.
  • the impeller 2A (hereinafter, simply referred to as “impeller 2A”) of the second example of the propeller fan 1 according to the present embodiment is from the inner peripheral surface 11a of the tubular portion 11. It is provided with a plurality of suction-side erection wall portions 12A which are arranged at distant places and have an annularly continuous connecting portion 12b and are integrated by the annular portion 41.
  • the suction side erection wall portion 12A is a plate portion having a substantially uniform thickness curved in a concave shape from the suction side end 11s of the tubular portion 11 toward the blowout side.
  • the concave bottom that is, the portion of the suction-side erection wall portion 12A farthest from the suction-side end 11s of the tubular portion 11, is closest to the center of the propeller fan 1.
  • the annular portion 41 integrates a plurality of suction-side erection wall portions 12A.
  • the annular portion 41 is a part of the suction side erection wall portion 12A, and is curved in a concave shape from the suction side end 11s of the tubular portion 11 toward the blowout side.
  • the portion of the plurality of suction side erection wall portions 12A near the cylinder portion 11 is connected to the cylinder portion 11 for each blade portion 6, while the portion of the plurality of suction side erection wall portions 12A far from the cylinder portion 11, in other words.
  • the portions of the plurality of suction-side erection wall portions 12A near the rotating shaft mounting portion 15A are continuously connected by the annular portion 41. That is, the plurality of suction-side erection wall portions 12A are arranged radially from the annular portion 41 arranged inside the tubular portion 11 toward the inner peripheral surface 11a of the tubular portion 11.
  • the front end 16 of the connection portion 12b of the suction side erection wall portion 12A is continuous with the rear end 17 of the connection portion 12b of the suction side erection wall portion 12A located forward in the rotation direction of the propeller fan 1.
  • the front end 16 and the rear end 17 of the adjacent suction side erection wall portions 12A are continuously connected.
  • the front end 16 and the rear end 17 of the continuous suction side erection wall portion 12A have a linear shape when viewed in the direction of the rotation center line of the propeller fan 1, and from the suction side end 11s of the tubular portion 11 to the blowout side. It has an arc shape that is recessed toward it.
  • the longitudinal wall portion 21A extends in a flat plate shape in the direction of the rotation center line of the propeller fan 1 following the continuous front end 16 and rear end 17.
  • the portion of the tubular portion 11 facing the vertical wall portion 21A in other words, the portion of the tubular portion 11 facing the vertical wall portion 21A is notched within a range that does not interfere with the support of the blade portion 6. It may be done. The weight of the propeller fan 1 can be reduced by this notch.
  • the outlet side erection wall portion 13A is provided at a portion surrounded by the suction side erection wall portion 12A and the cylinder portion 11 when viewed in the direction of the rotation center line of the propeller fan 1.
  • annular longitudinal wall portion 42 is provided on the inner edge of the annular portion 41.
  • the annular longitudinal wall portion 42 extends from the inner edge of the annular portion 41 toward the outlet side end 11b of the tubular portion 11.
  • the annular longitudinal wall portion 42 may or may not reach the outlet side end 11b of the tubular portion 11.
  • the outlet side end 42b of the annular longitudinal wall portion 42 is connected to the rotating shaft mounting portion 15A.
  • the inner edge shape of the annular portion 41 may be a simple circular shape when viewed in the direction of the rotation center line of the propeller fan 1, or may be a polygonal shape as shown in FIG.
  • the polygonal inner edge shape includes, for example, a vertex arranged on a line segment that bisects the connection portion between the suction side erection wall portion 12A and the cylinder portion 11 in the rotation direction of the propeller fan 1, and the suction side erection wall portion. It has vertices arranged on a line segment that bisects the arc-shaped portion that separates the 12A and the tubular portion 11 from each other in the rotation direction of the propeller fan 1.
  • the inner edge shape of the annular portion 41 draws a hexagon.
  • the rotating shaft mounting portion 15A includes a flange portion 45 that is closer to the outlet side end 11b of the tubular portion 11 than the annular portion 41 shared by the plurality of suction side erection wall portions 12A.
  • the flange portion 45 is a wall that extends in a direction perpendicular to the center of rotation of the propeller fan 1 and is connected to the outlet side end 42b of the annular longitudinal wall portion 42.
  • the flange portion 45 is a wall that closes the boundary area inside the annular portion 41.
  • the impeller 2A is continuous with the root portion 31a of the front edge 31 of the blade portion 6 continuous with the suction side end 11s of the tubular portion 11 and the suction side end 11s of the tubular portion 11. It is provided with a suction side erection wall portion 12A. Therefore, the impeller 2A distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12A, and distributes the load to the front edge 31 of the blade portion 6. The stress concentration at the root portion 31a is relaxed.
  • the rear end 17 of the suction side erection wall portion 12A is located behind the root portion 31a of the front edge 31 of the nearest blade portion 6 in the rotation direction R of the propeller fan 1. doing. Therefore, the impeller 2A distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12A, and distributes the load to the front edge 31 of the blade portion 6. The stress concentration at the root portion 31a is relaxed.
  • the impeller 2A includes a root portion 31a of the front edge 31 of the blade portion 6 sandwiched between the front end 16 and the rear end 17 of the suction side erection wall portion 12A. Therefore, the impeller 2A distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12A, and distributes the load to the front edge 31 of the blade portion 6. The stress concentration at the root portion 31a is more effectively relaxed.
  • the impeller 2A includes a suction side erection wall portion 12A and a blowout side erection wall portion 13A that do not overlap in the direction along the rotation center line of the propeller fan 1. Therefore, the impeller 2A can be easily integrally molded by a mold that can be divided in the direction of the rotation center line.
  • the impeller 2A includes a plurality of suction-side erection wall portions 12A which are arranged at a location away from the inner peripheral surface 11a of the tubular portion 11 and are integrated by an annular portion 41 which is continuous in an annular shape. ing. Therefore, in the impeller 2A, the stress generated at the root portion 31a of the front edge 31 of the blade portion 6 is dispersed in the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12A, and the suction side erection wall portion 12A is dispersed. The stress to be applied is also applied to the annular portion 41, and the stress concentration at the root portion 31a of the front edge 31 of the blade portion 6 is further relaxed.
  • FIG. 8 is a view of the boss portion of the second example of the impeller of the propeller fan according to the embodiment of the present invention as viewed from the suction side.
  • the impeller 2A of the propeller fan 1 has an opening width of the suction side erection wall portion 12A decreasing from the center side to the outer peripheral side of the boss portion 5. It may have a drain hole 47.
  • the drain holes 47 are provided on the outer peripheral portion of each suction side erection wall portion 12A.
  • the drain hole 47 has an egg-shaped shape that extends toward the center side of the boss portion 5 or the inner peripheral side of the suction side erection wall portion 12A.
  • the drain holes 47 are provided on the inner peripheral side and are convex toward the center side of the boss portion 5 or the inner peripheral side of the suction side erection wall portion 12A, and the first semi-arc-shaped portion 47a and the first semi-arc-shaped portion 47a. It has a wedge-shaped portion 47b that is continuous with the chord portion and whose opening width decreases at a substantially constant rate from the center side to the outer peripheral side of the boss portion 5.
  • the drain hole 47 has a shape that is line-symmetric with respect to a virtual line extending in the radial direction of the propeller fan 1.
  • the minimum opening width portion of the wedge-shaped portion 47b that is, the portion closest to the outer edge of the boss portion 5, is closed in a trapezoidal shape along the outer edge of the boss portion 5.
  • the impeller 2A increases the area of the drainage hole 47 while relaxing the stress concentration at the root portion 31a of the front edge 31 of the blade portion 6 to increase the boss.
  • Moisture such as rainwater accumulated in part 5 can be preferably drained.
  • the drainage hole 47 is provided in the suction side erection wall portion 12A that widely spreads in the vicinity of the root portion 31a, it has a degree of freedom to secure a large opening area, and by extension, it is a factor of ice or hail. Even if there is, it can be easily drained. Further, the drain hole 47 has an egg shape extending toward the center of the boss portion 5.
  • the water accumulated on the blowout side of the propeller fan 1 is easily drained from the propeller fan 1 along the inclination of the suction side erection wall portion 12A.
  • the water is easily drained when going to the outside of the rotating propeller fan 1.
  • FIG. 9 is a view of a third example of the impeller of the propeller fan according to the embodiment of the present invention as viewed from the suction side.
  • FIG. 10 is a perspective view of a third example of the impeller of the propeller fan according to the embodiment of the present invention as viewed from the outlet side.
  • FIG. 11 is a vertical sectional view of a third example of an impeller of a propeller fan according to an embodiment of the present invention.
  • the impeller 2B (hereinafter, simply referred to as “impeller 2B”) of the third example of the propeller fan 1 according to the present embodiment is located away from the inner peripheral surface 11a of the tubular portion 11. It is provided with a plurality of suction-side erection wall portions 12B which are arranged in an annular portion and have a continuous annular connection portion 12b and are integrated by the annular portion 41B.
  • the suction side erection wall portion 12B is a plate portion having a substantially uniform thickness curved in a concave shape from the suction side end 11s of the tubular portion 11 toward the blowout side.
  • the concave bottom that is, the portion of the suction-side erection wall portion 12B farthest from the suction-side end 11s of the tubular portion 11, is closest to the center of the propeller fan 1.
  • the annular portion 41B integrates a plurality of suction-side erection wall portions 12B.
  • the annular portion 41B is a part of the suction side erection wall portion 12B, and extends from the suction side end 11s of the cylinder portion 11 toward the center of the cylinder portion 11.
  • the portion of the plurality of suction side erection wall portions 12B near the cylinder portion 11 is connected to the cylinder portion 11 for each blade portion 6, while the portion of the plurality of suction side erection wall portions 12B far from the cylinder portion 11, in other words.
  • the portions of the plurality of suction-side erection wall portions 12B near the rotating shaft mounting portion 15B are continuously connected by the annular portion 41B. That is, the plurality of suction-side erection wall portions 12B are arranged radially from the annular portion 41B arranged inside the tubular portion 11 toward the inner peripheral surface 11a of the tubular portion 11.
  • the front end 16 of the connection portion 12b of the suction side erection wall portion 12B is continuous with the rear end 17 of the connection portion 12b of the suction side erection wall portion 12B located forward in the rotation direction of the propeller fan 1.
  • the front end 16 and the rear end 17 of the adjacent suction side erection wall portions 12B are continuously connected.
  • the front end 16 and the rear end edge 17 of the continuous suction side erection wall portion 12B have a curved shape, for example, the outside of the cylinder portion 11, that is, the center of curvature on the blade portion 6 side when viewed in the direction of the rotation center line of the propeller fan 1. It has an arc shape with.
  • the front end 16 and the rear end edge 17 of these continuous suction-side erection wall portions 12B have an arc shape recessed inward toward the inside of the boss portion 5. Further, the front end 16 and the rear end 17 of the continuous suction side erection wall portion 12B have an arc shape recessed from the suction side end 11s of the tubular portion 11 toward the blowout side.
  • the continuous front end 16 and the rear end 17 are connected to the outlet side erection wall portion 13B via the longitudinal wall portion 21B.
  • the longitudinal wall portion 21B is curved in a concave arc shape toward the inside of the boss portion 5 following these continuous front end 16 and rear end 17, and extends with a substantially uniform thickness. There is. As shown in FIG. 10, the portion of the tubular portion 11 facing the vertical wall portion 21B, in other words, the portion of the tubular portion 11 facing the vertical wall portion 21B, hinders the support of the blade portion 6. It has a notch to the extent that it does not exist.
  • the outlet side erection wall portion 13B is provided at a portion surrounded by the suction side erection wall portion 12B and the cylinder portion 11 when viewed in the direction of the rotation center line of the propeller fan 1.
  • annular longitudinal wall portion 42 is provided on the inner edge of the annular portion 41B.
  • the annular longitudinal wall portion 42 extends from the inner edge of the annular portion 41 toward the outlet side end 11b of the tubular portion 11.
  • the annular longitudinal wall portion 42 may or may not reach the outlet side end 11b of the tubular portion 11.
  • the outlet side end 42b of the annular longitudinal wall portion 42 is connected to the rotating shaft mounting portion 15B.
  • the inner edge shape of the annular portion 41B may be a simple circular shape as shown in FIG. 9 or a polygonal shape when viewed in the direction of the rotation center line of the propeller fan 1.
  • the polygonal inner edge shape includes, for example, a vertex arranged on a line segment that bisects the connection portion between the suction side erection wall portion 12B and the cylinder portion 11 in the rotation direction of the propeller fan 1, and the suction side erection wall portion. It has vertices arranged on a line segment that bisects the arc-shaped portion that separates the 12B and the tubular portion 11 from each other in the rotation direction of the propeller fan 1.
  • the rotating shaft mounting portion 15B includes a flange portion 45 that is closer to the blowout side end 11b of the tubular portion 11 than the annular portion 41B shared by the plurality of suction side erection wall portions 12B.
  • the flange portion 45 is a wall that extends in a direction perpendicular to the center of rotation of the propeller fan 1 and is connected to the outlet side end 42b of the annular longitudinal wall portion 42.
  • the flange portion 45 is a wall that closes the boundary area inside the annular portion 41B.
  • the impeller 2B is continuous with the root portion 31a of the front edge 31 of the blade portion 6 continuous with the suction side end 11s of the tubular portion 11 and the suction side end 11s of the tubular portion 11. It is provided with a suction side erection wall portion 12B. Therefore, the impeller 2B distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12B, so that the front edge 31 of the blade portion 6 The stress concentration at the root portion 31a is relaxed.
  • the rear end 17 of the suction side erection wall portion 12B is located behind the root portion 31a of the front edge 31 of the nearest blade portion 6 in the rotation direction R of the propeller fan 1. doing. Therefore, the impeller 2B distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12B, so that the front edge 31 of the blade portion 6 The stress concentration at the root portion 31a is relaxed.
  • the impeller 2B includes a root portion 31a of the front edge 31 of the blade portion 6 sandwiched between the front end 16 and the rear end 17 of the suction side erection wall portion 12B. Therefore, the impeller 2B distributes the load generated at the root portion 31a of the front edge 31 of the blade portion 6 to the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12B, so that the front edge 31 of the blade portion 6 The stress concentration at the root portion 31a is more effectively relaxed.
  • the impeller 2B includes a suction side erection wall portion 12B and a blowout side erection wall portion 13B that do not overlap in the direction along the rotation center line of the propeller fan 1. Therefore, the impeller 2B can be easily integrally molded by a mold that can be divided in the direction of the rotation center line.
  • the impeller 2B includes a plurality of suction-side erection wall portions 12B which are arranged at a location away from the inner peripheral surface 11a of the tubular portion 11 and are integrated by an annular portion 41B which is continuous in an annular shape. ing. Therefore, in the impeller 2B, the stress generated at the root portion 31a of the front edge 31 of the blade portion 6 is dispersed in the cylinder portion 11 of the boss portion 5 and the suction side erection wall portion 12B, and the suction side erection wall portion 12B is dispersed. The stress to be applied is also applied to the annular portion 41B, and the stress concentration at the root portion 31a of the front edge 31 of the blade portion 6 is further relaxed.
  • the impeller 2B according to the present embodiment has an arc shape in which the front end 16 and the rear end 17 of the adjacent suction side erection wall portions 12B are concavely recessed inward of the boss portion 5. Therefore, the impeller 2B increases the stress borne by the suction side erection wall portion 12B and the annular portion 41B, and further greatly relaxes the stress concentration at the root portion 31a of the front edge 31 of the blade portion 6.
  • the stress concentration at the connecting portion between the root portion 31a of the front edge 31 of the blade portion 6 and the boss portion 5 is more effectively relaxed. it can.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Other Air-Conditioning Systems (AREA)
PCT/JP2019/029948 2019-07-31 2019-07-31 プロペラファンの羽根車、送風機、および空気調和機の室外機 WO2021019710A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2019/029948 WO2021019710A1 (ja) 2019-07-31 2019-07-31 プロペラファンの羽根車、送風機、および空気調和機の室外機
JP2021536533A JP7245339B2 (ja) 2019-07-31 2019-07-31 プロペラファンの羽根車、送風機、および空気調和機の室外機
CN201980098803.6A CN114207290B (zh) 2019-07-31 2019-07-31 螺旋桨式风扇的叶轮、送风机以及空调机的室外机
EP19939652.4A EP4006355A4 (en) 2019-07-31 2019-07-31 BLADE FOR PROPELLER FAN, BLOWER AND OUTDOOR UNIT FOR AIR CONDITIONER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/029948 WO2021019710A1 (ja) 2019-07-31 2019-07-31 プロペラファンの羽根車、送風機、および空気調和機の室外機

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JP (1) JP7245339B2 (enrdf_load_stackoverflow)
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WO (1) WO2021019710A1 (enrdf_load_stackoverflow)

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WO2025009070A1 (ja) * 2023-07-04 2025-01-09 三菱電機株式会社 プロペラファン及び空気調和機

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JPS5870497U (ja) * 1981-11-06 1983-05-13 アイシン精機株式会社 内燃機関用冷却フアン
JPS611897A (ja) * 1984-01-30 1986-01-07 Hitachi Ltd エアコンデイシヨナ用プロペラフアン
JPH0674196A (ja) * 1992-08-26 1994-03-15 Hitachi Ltd プロペラファンおよびこれを備えた空気調和機
JP2005188325A (ja) * 2003-12-24 2005-07-14 Calsonic Kansei Corp モータファンのアンバランス修正構造
JP2017053301A (ja) 2015-09-11 2017-03-16 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド プロペラファン及び空気調和機の室外機

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JPH05256299A (ja) * 1992-03-13 1993-10-05 Toshiba Corp 送風機
JP4388992B1 (ja) * 2008-10-22 2009-12-24 シャープ株式会社 プロペラファン、流体送り装置および成型金型
JP5611277B2 (ja) * 2012-06-20 2014-10-22 三菱電機株式会社 送風機、室外機及び冷凍サイクル装置
CN106377043B (zh) * 2012-08-31 2019-11-08 夏普株式会社 送风装置
JP2019060322A (ja) * 2017-09-28 2019-04-18 日本電産株式会社 軸流ファン

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JPS5870497U (ja) * 1981-11-06 1983-05-13 アイシン精機株式会社 内燃機関用冷却フアン
JPS611897A (ja) * 1984-01-30 1986-01-07 Hitachi Ltd エアコンデイシヨナ用プロペラフアン
JPH0674196A (ja) * 1992-08-26 1994-03-15 Hitachi Ltd プロペラファンおよびこれを備えた空気調和機
JP2005188325A (ja) * 2003-12-24 2005-07-14 Calsonic Kansei Corp モータファンのアンバランス修正構造
JP2017053301A (ja) 2015-09-11 2017-03-16 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド プロペラファン及び空気調和機の室外機

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Publication number Priority date Publication date Assignee Title
WO2025009070A1 (ja) * 2023-07-04 2025-01-09 三菱電機株式会社 プロペラファン及び空気調和機

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JPWO2021019710A1 (enrdf_load_stackoverflow) 2021-02-04
EP4006355A4 (en) 2023-04-12
EP4006355A1 (en) 2022-06-01
JP7245339B2 (ja) 2023-03-23
CN114207290A (zh) 2022-03-18
CN114207290B (zh) 2023-11-10

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