WO2019215783A1 - Blower device, and outdoor unit for air conditioner - Google Patents

Blower device, and outdoor unit for air conditioner Download PDF

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Publication number
WO2019215783A1
WO2019215783A1 PCT/JP2018/017631 JP2018017631W WO2019215783A1 WO 2019215783 A1 WO2019215783 A1 WO 2019215783A1 JP 2018017631 W JP2018017631 W JP 2018017631W WO 2019215783 A1 WO2019215783 A1 WO 2019215783A1
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WO
WIPO (PCT)
Prior art keywords
rib
linear
region
linear rib
height
Prior art date
Application number
PCT/JP2018/017631
Other languages
French (fr)
Japanese (ja)
Inventor
勝幸 山本
敬英 田所
拓矢 寺本
貴史 阿部
布施　敏也
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to EP18918171.2A priority Critical patent/EP3792498A4/en
Priority to PCT/JP2018/017631 priority patent/WO2019215783A1/en
Priority to JP2020517634A priority patent/JP6929453B2/en
Publication of WO2019215783A1 publication Critical patent/WO2019215783A1/en

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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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • 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
    • 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
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards

Definitions

  • the present invention relates to an air blower equipped with a fan guard and an outdoor unit for an air conditioner.
  • Patent Document 1 describes a fan guard for a blower unit.
  • This fan guard has many annular ribs arranged concentrically and many radiation ribs arranged at equal intervals in the circumferential direction.
  • Each radiation rib and each annular rib are inclined so as to follow the air flow from the blower fan.
  • the air flow direction fluctuates irregularly in time. For this reason, when the rib is provided on the downstream side of the boss, the air flow on the downstream side of the rib may be greatly disturbed regardless of the inclination angle of the rib. Therefore, the above fan guard configuration has a problem that noise cannot be sufficiently reduced.
  • the present invention has been made to solve the above-described problems, and an object thereof is to provide a blower and an air conditioner outdoor unit that can further reduce noise.
  • the blower according to the present invention includes a shaft portion provided on a rotating shaft, a propeller fan having a blade provided around the shaft portion, and a plurality of devices provided on the leeward side of the propeller fan to allow air to pass therethrough.
  • a fan guard having a rib for defining an opening of the first portion, and when viewed in parallel with the rotation shaft, the fan guard has a first region disposed so as to overlap the shaft portion, and an outer periphery than the shaft portion.
  • a second region disposed on the inner peripheral side of the rotation trajectory of the blade, and the dimension of the rib in a direction parallel to the rotation axis is defined as the height of the rib
  • the height of the rib in the first region is lower than the height of the rib in the second region.
  • the outdoor unit for an air conditioner according to the present invention includes the blower according to the present invention.
  • the height of the rib in the first region arranged so as to overlap the shaft portion when viewed in parallel with the rotation axis is higher than the height of the rib in the second region arranged on the outer peripheral side from the first region. Is also low. For this reason, irrespective of the direction of the flow of air flowing into the first region, the projection width when the ribs of the first region are projected onto a plane perpendicular to the direction of the flow can be reduced. Therefore, according to the present invention, even if the air flow direction fluctuates irregularly in time on the downstream side of the shaft portion, the turbulence in the air flow that occurs on the downstream side of the ribs in the first region can be reduced. Therefore, the noise of the blower can be further reduced.
  • FIG. It is a figure which shows typically the structure which cut
  • FIG. It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention. It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention. It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention. It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention.
  • FIG. 2 It is a figure which shows typically the structure which cut
  • FIG. 2 shows typically the structure which cut
  • FIG. It is a figure explaining the disturbance of the flow in the downstream of the linear rib 22a in the air blower which concerns on Embodiment 2 of this invention.
  • FIG. It is a figure explaining the disorder of the flow in the downstream of the linear rib 22a.
  • FIG. It is a figure which shows typically the structure which cut
  • FIG. It is a front view which shows the structure of the propeller fan 10 of the air blower which concerns on Embodiment 4 of this invention.
  • FIG. 1 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O.
  • the upper part represents the windward side
  • the lower part represents the leeward side.
  • the air blower according to the present embodiment includes a propeller fan 10, a fan motor 11 that drives the propeller fan 10, and a fan guard 20 provided on the leeward side of the propeller fan 10. is doing.
  • the propeller fan 10 includes a boss 13 (an example of a shaft portion) provided on the rotation axis O and a plurality of blades 14 provided around the boss 13.
  • the fan guard 20 is provided so as to cover the air outlet 12 of the propeller fan 10. As will be described later, when the air blower is mounted on the air conditioner outdoor unit 100, the propeller fan 10 and the fan motor 11 are provided inside the casing 101 of the air conditioner outdoor unit 100, and the air outlet 12 and the fan are provided.
  • the guard 20 is provided on the front surface of the housing 101 (see FIG. 8 and the like).
  • the fan guard 20 has ribs 22 that define a plurality of openings 21 through which air passes.
  • the rib 22 has a configuration in which a plurality of linear ribs 22 a extending linearly or curvedly are combined when viewed in parallel with the rotation axis O of the propeller fan 10. That is, the linear rib 22 a constitutes a part of the rib 22.
  • the ribs 22 may be made of resin or metal.
  • the fan guard 20 When viewed in parallel with the rotation axis O, the fan guard 20 has a first region 31 that is disposed so as to overlap the boss 13, and is located on the outer peripheral side of the boss 13 and within the rotation locus of the outer peripheral edge 14 a of the blade 14. And a second region 32 disposed on the circumferential side.
  • the height of the rib 22 in the first region 31 is lower than the height of the rib 22 in the second region 32.
  • the height of the rib 22 in the entire second region 32 may be constant.
  • FIGS. 2 to 5 are diagrams for explaining the definition of the dimensions and angles of the ribs 22 in the blower according to the present embodiment.
  • 2 to 5 show cross-sectional configurations in which one linear rib 22a is cut perpendicular to the extending direction.
  • the vertical direction in FIGS. 2 to 5 represents a direction parallel to the rotation axis O, the upper side represents the windward side, and the lower side represents the leeward side.
  • the linear rib 22a shown in FIG. 2 has an oval cross-sectional shape that is long in one direction.
  • the major axis direction of the linear rib 22a is substantially parallel to the rotation axis O.
  • the dimension of the linear rib 22a in the direction parallel to the rotation axis O is defined as the height Ld of the linear rib 22a.
  • the height Ld of the linear rib 22a is equal to the distance in the direction parallel to the rotation axis O between the end point 22a1 on the leeward side of the linear rib 22a and the end point 22a2 on the leeward side of the linear rib 22a.
  • the height of the rib 22 in a certain region is the height Ld of the linear rib 22a existing in the region.
  • the maximum value of the dimension of the linear rib 22a in the direction perpendicular to the rotation axis O is defined as the width Lw of the linear rib 22a.
  • the linear rib 22a shown in FIG. 3 has a rectangular cross-sectional shape that is long in one direction.
  • the major axis direction of the linear rib 22a is substantially parallel to the rotation axis O.
  • the height Ld of the linear rib 22a is equal to the distance in the direction parallel to the rotation axis O between the center 22a5 of the leeward side edge 22a3 and the center 22a6 of the leeward side edge 22a4.
  • the linear rib 22a shown in FIG. 4 has an oval cross-sectional shape that is long in one direction.
  • the height Ld of the linear rib 22a is equal to the distance between the windward end point 22a1 and the leeward end point 22a2 in the direction parallel to the rotation axis O.
  • the major axis direction of the linear rib 22 a is inclined with respect to the rotation axis O or a straight line parallel to the rotation axis O.
  • an angle formed by a straight line parallel to the major axis direction (for example, a straight line connecting the end point 22a1 and the end point 22a2) and a straight line parallel to the rotation axis O or the rotation axis O Is defined as the inclination angle ⁇ of the linear rib 22a.
  • the linear rib 22a shown in FIG. 5 has a parallelogram-shaped cross section that is long in one direction.
  • the height Ld of the linear rib 22a is equal to the distance in the direction parallel to the rotation axis O between the center 22a5 of the leeward side edge 22a3 and the center 22a6 of the leeward side edge 22a4.
  • the major axis direction of the linear rib 22a is inclined at an inclination angle ⁇ with respect to the rotation axis O or a straight line parallel to the rotation axis O.
  • the direction of local flow in the air blown from the propeller fan 10 is inclined with respect to the rotation axis O according to the radial position of the blade 14.
  • the linear rib 22a existing in the second region 32 is formed so as to be inclined in accordance with the direction of air flow.
  • the height of the rib 22 in the first region 31 of the fan guard 20 is lower than the height of the rib 22 in the second region 32.
  • the projection width of linear rib 22a which a flow collides can be made small. Therefore, according to the present embodiment, the disturbance of the air flow on the downstream side of the linear rib 22a can be reduced.
  • FIGS. 6 and 7 are diagrams for explaining the flow disturbance on the downstream side of the linear rib 22a.
  • FIG. 6 shows a case where the height of the linear rib 22a is relatively high
  • FIG. 7 shows a case where the height of the linear rib 22a is relatively low.
  • the vertical direction in FIGS. 6 and 7 represents a direction parallel to the rotation axis O
  • the upper side represents the windward side
  • the lower side represents the leeward side.
  • the linear rib 22a flows through the linear rib 22a.
  • the projection width when projected onto a plane perpendicular to the direction becomes large.
  • 8 to 10 are front views showing the configuration of the air conditioner outdoor unit 100 provided with the blower according to the present embodiment. 8 to 10 also show examples of the shape of the rib 22 in the present embodiment. 8 to 10, the first region 31 of the rib 22 is shown in white, and the second region 32 of the rib 22 is shown in hatching.
  • the air conditioner outdoor unit 100 includes a casing 101 and a propeller fan 10 accommodated in the casing 101.
  • a fan guard 20 having ribs 22 is provided on the front surface of the housing 101. 8 to 10, only the rib 22 of the fan guard 20 is shown.
  • an outdoor heat exchanger (not shown) that constitutes a part of the refrigeration cycle apparatus and performs heat exchange between the refrigerant and the outdoor air is accommodated.
  • the outdoor heat exchanger is arranged upstream of the propeller fan 10 in the air flow by the propeller fan 10.
  • the rib 22 has a plurality of linear linear ribs 22a extending in the left-right direction. In FIG. 8, eight linear ribs 22a are shown.
  • the rib 22 may have a plurality of linear linear ribs 22a extending in the vertical direction.
  • the ribs 22 are a plurality of linear or curved linear ribs 22a that extend radially from the center of the fan guard 20 (for example, the rotation axis O of the propeller fan 10) toward the outer peripheral side. have.
  • eight linear ribs 22a are shown. In the example illustrated in FIG.
  • the rib 22 includes a plurality of linear ribs 22 a that are concentrically arranged with the central portion of the fan guard 20 (for example, the rotation axis O of the propeller fan 10) as a common center. .
  • the central portion of the fan guard 20 for example, the rotation axis O of the propeller fan 10.
  • five linear ribs 22a are shown.
  • the fan guard 20 of the present embodiment may have any one of the ribs 22 shown in FIGS. 8 to 10, or any two of the ribs 22 shown in FIGS. You may have the structure where two or more were combined.
  • FIG. 11 is a diagram schematically illustrating a configuration in which a blower according to a modification of the present embodiment is cut along a plane including the rotation axis O.
  • the fan guard 20 of the present modification includes a flat plate portion 23 provided at the center portion and ribs 22 provided around the flat plate portion 23.
  • the flat plate portion 23 has a smaller diameter than the boss 13 when viewed in parallel with the rotation axis O.
  • a part of the boss 13 overlaps the flat plate part 23, and the other part of the boss 13 protrudes from the flat plate part 23.
  • At least a part of the rib 22 is formed in the first region 31 overlapping the boss 13.
  • the height of the rib 22 in the first region 31 is lower than the height of the rib 22 in the second region 32.
  • the blower includes the propeller fan 10 having the boss 13 provided on the rotating shaft O and the wings 14 provided around the boss 13, and the lee of the propeller fan 10. And a fan guard 20 having ribs 22 provided on the side and defining a plurality of openings 21 through which air passes.
  • the fan guard 20 When viewed in parallel with the rotation axis O, the fan guard 20 has a first region 31 that is disposed so as to overlap the boss 13, and is located on the outer peripheral side of the boss 13 and within the rotation locus of the outer peripheral edge 14 a of the blade 14. And a second region 32 disposed on the circumferential side.
  • the height of the rib 22 in the first region 31 (for example, the height of the linear rib 22a existing in the first region 31).
  • Ld is lower than the height of the rib 22 in the second region 32 (for example, the height Ld of the linear rib 22a existing in the second region 32).
  • the boss 13 is an example of a shaft portion.
  • the projection width when the rib 22 of the first region 31 is projected onto a plane perpendicular to the direction of the flow regardless of the direction of the flow of air flowing into the first region 31 of the fan guard 20. Can be small. Therefore, according to the present embodiment, even if the direction of the air flow on the downstream side of the boss 13 fluctuates irregularly in time, the disturbance of the air flow that occurs on the downstream side of the rib 22 in the first region 31. Therefore, the noise of the blower can be further reduced.
  • the height of the ribs 22 in the entire second region 32 may be constant. There is little temporal variation in the direction of the air flow flowing into the second region 32. For this reason, if the linear rib 22a is formed so as to be inclined in accordance with the direction of the air flow, even if the height of the rib 22 throughout the second region 32 is constant, the downstream side of the rib 22 Disturbance of the flow on the side can be suppressed.
  • the outdoor unit 100 for air conditioning apparatuses which concerns on this Embodiment is provided with the said air blower. According to this configuration, the same effect as described above can be obtained in the air conditioner outdoor unit 100.
  • the height of the ribs 22 in the entire first region 31 is lower than the height of the ribs 22 in the second region 32.
  • the height of the rib 22 in a part of the first region 31 is lower than the height of the rib 22 in the second region 32, the above-described effect can be obtained. That is, if the height of the rib 22 in a part of the first region 31 is lower than the height of the rib 22 in the second region 32, the height of the rib 22 in the other part of the first region 31 is The height of the rib in the second region 32 may be the same as or higher than that.
  • FIG. 12 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O.
  • the present embodiment is different from the first embodiment in the shape of the rib 22 in the first region 31.
  • symbol is attached
  • each of the plurality of linear ribs 22a existing in the first region 31 has a circular cross-sectional shape.
  • Each of these linear ribs 22a has, for example, a cylindrical shape.
  • the width of the linear rib 22a existing in the first region 31 is the same as the height of the linear rib 22a.
  • the width of the linear rib 22a existing in the first region 31 may be larger than the height of the linear rib 22a.
  • FIG. 13 is a diagram for explaining the flow disturbance on the downstream side of the linear rib 22a in the blower according to the present embodiment.
  • the vertical direction in FIG. 13 represents a direction parallel to the rotation axis O
  • the upper side represents the windward side
  • the lower side represents the leeward side.
  • the projected width of the linear rib 22a can be made smaller regardless of the direction of the flow of air flowing in. For this reason, even if the direction of the air flow fluctuates on the downstream side of the boss 13, the separation that occurs on the downstream side of the linear rib 22a can be further reduced.
  • the projection width of the linear rib 22a can be made the same regardless of the direction of the flow. For this reason, no matter how the direction of the air flow fluctuates, the turbulence of the flow that occurs on the downstream side of the linear rib 22a can be kept small.
  • the rib 22 in the first region 31 has a circular cross-sectional shape. According to this configuration, even if the direction of the air flow fluctuates on the downstream side of the boss 13, the separation that occurs on the downstream side of the linear rib 22a can be further reduced.
  • the width of the rib 22 when the dimension of the rib 22 in the direction perpendicular to the rotation axis O and perpendicular to the extending direction of the rib 22 is defined as the width of the rib 22,
  • the width of the rib 22 (for example, the width of the linear rib 22a existing in the first region 31) is equal to or greater than the height of the rib (for example, the height of the linear rib 22a). According to this configuration, even if the direction of the air flow fluctuates on the downstream side of the boss 13, the separation that occurs on the downstream side of the linear rib 22a can be further reduced.
  • FIG. 14 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O.
  • the present embodiment is different from the second embodiment in the shape of the rib 22 in the second region 32.
  • symbol is attached
  • the rib 22 in the second region 32 has a first rib 24 and a second rib 25 that are disposed so as to overlap each other when viewed in parallel with the rotation axis O.
  • the second rib 25 is disposed on the leeward side of the first rib 24.
  • the first rib 24 has a configuration in which a plurality of first linear ribs 24 a extending linearly or curvedly when viewed in parallel with the rotation axis O are combined.
  • Each of the plurality of first linear ribs 24a has a circular cross-sectional shape.
  • the second rib 25 has a configuration in which a plurality of second linear ribs 25a extending linearly or curvedly along the plurality of first linear ribs 24a are combined when viewed in parallel with the rotation axis O. is doing.
  • Each of the plurality of second linear ribs 25a has a circular cross-sectional shape.
  • Each of the plurality of linear ribs 22a existing in the second region 32 has a first linear rib 24a and a second linear rib 25a that are arranged so as to overlap each other when viewed in parallel with the rotation axis O. .
  • the rotation axis O between the end point on the leeward side of the first linear rib 24a and the end point on the leeward side of the second linear rib 25a.
  • the distance in a direction parallel to the height is the height of the linear rib 22a.
  • a straight line connecting the center of the first linear rib 24a and the center of the second linear rib 25a, and a straight line parallel to the rotational axis O or the rotational axis O Is an inclination angle of the linear rib 22a.
  • the cross-sectional areas of the first linear rib 24a and the second linear rib 25a constituting the linear rib 22a may be different from each other.
  • the cross-sectional area of at least one of the first linear rib 24 a and the second linear rib 25 a may be the same as the cross-sectional area of the linear rib 22 a existing in the first region 31.
  • the linear rib 22a may have a configuration in which three or more linear ribs each having a circular cross-sectional shape are arranged to overlap each other.
  • FIGS. 15 and 16 are diagrams for explaining the flow disturbance on the downstream side of the linear rib 22a.
  • FIG. 15 shows a case where the linear rib 22a has an oval cross-sectional shape
  • FIG. 16 shows that the linear rib 22a is the first linear rib 24a and the second linear rib 25a as in the present embodiment. Is shown.
  • the vertical direction represents a direction parallel to the rotation axis O
  • the upper side represents the windward side
  • the lower side represents the leeward side.
  • the linear rib 22a has an oval cross-sectional shape
  • the air flowing in the direction not following the inclination of the linear rib 22a collides with the linear rib 22a, and then the linear rib It wraps around along the upstream end surface and the downstream end surface of 22a. Since the curvature change is large at the upstream end surface and the downstream end surface, the entrained air is separated from the upstream end surface and the downstream end surface. As a result, the air flow downstream of the linear rib 22a is disturbed with the same width as the projected width of the linear rib 22a. Therefore, the noise of the blower has been increased.
  • the first linear rib 24a and the second linear rib 25a constituting the linear rib 22a each have a circular cross-sectional shape.
  • the air that has flowed in the direction not following the inclination of the linear rib 22a collides with the first linear rib 24a and the second linear rib 25a, and then the upstream end face and the second linear rib of the first linear rib 24a. It goes around along the downstream end face of 25a. Since both the upstream end face of the first linear rib 24a and the downstream end face of the second linear rib 25a have a certain curvature, the wraparound air easily adheres to each end face and flows. Peeling is less likely to occur. Thereby, the width
  • FIG. 17 is a diagram schematically showing the configuration of the linear rib 22a of the air blower according to the first modification of the present embodiment.
  • a coating for preventing rust may be applied.
  • the coated linear ribs 22a are formed on the surfaces of the first linear ribs 24a and the second linear ribs 25a and the first linear ribs 24a and the second linear ribs 25a.
  • the cross-sectional shape of the linear rib 22a is a peanut shape. Even in such a case, the same effect as described above can be obtained if each of the upstream end surface and the downstream end surface of the linear rib 22a has an arc shape.
  • FIG. 18 is a diagram schematically showing the configuration of the linear rib 22a of the blower according to the second modification of the present embodiment.
  • the first linear rib 24 a and the second linear rib 25 a may be separated via a gap 27. Even in this case, rotation between the end point on the leeward side of the first linear rib 24a and the end point on the leeward side of the second linear rib 25a in the cross section perpendicular to the extending direction of the linear rib 22a.
  • the distance in the direction parallel to the axis O is the height Ld of the linear rib 22a.
  • a straight line connecting the center of the first linear rib 24a and the center of the second linear rib 25a, and a straight line parallel to the rotational axis O or the rotational axis O Is an inclination angle ⁇ of the linear rib 22a.
  • the ribs 22 (for example, the linear ribs 22a) in the second region 32 are arranged so as to overlap each other when viewed in parallel with the rotation axis O.
  • 1 rib for example, 1st linear rib 24a
  • 2nd rib for example, 2nd linear rib 25a
  • Each of the first rib and the second rib has a circular cross-sectional shape. According to this configuration, the curvatures of the upstream end surface and the downstream end surface of the linear rib 22a in the second region 32 can be made constant. Therefore, even if air flows in the second region 32 in a direction that does not follow the inclination of the linear rib 22a, the turbulence of the flow on the downstream side of the linear rib 22a can be reduced.
  • the first rib and the second rib are separated via the gap 27. According to this configuration, part of the air that has collided with the first linear ribs 24a and the second linear ribs 25a passes through the gap 27, so that the turbulence of the flow on the downstream side of the linear ribs 22a is further reduced. be able to.
  • first linear rib 24a and the second linear rib 25a constituting one linear rib 22a are arranged so as to overlap each other when viewed in parallel with the rotation axis O.
  • One linear rib 22a may be configured by a first linear rib 24a and a second linear rib 25a that are arranged so as not to overlap each other when viewed in parallel with the rotation axis O.
  • FIG. 19 is a diagram illustrating an example of a linear rib having a first linear rib and a second linear rib arranged so as not to overlap each other in the blower according to the present embodiment.
  • first linear ribs 24b1 and 24b2 and the second linear ribs 25b1 and 25b2 are projected onto a plane perpendicular to the rotation axis O, the first linear ribs 24b1 It is adjacent to both the rib 25b1 and the second linear rib 25b2 via a gap.
  • the interval S1 between the first linear rib 24b1 and the second linear rib 25b1 is shorter than the interval S2 between the first linear rib 24b1 and the second linear rib 25b2.
  • one linear rib 22b1 is constituted by the first linear rib 24b1 and the second linear rib 25b1. That is, the distance in the direction parallel to the rotation axis O between the end point on the leeward side of the first linear rib 24b1 and the end point on the leeward side of the second linear rib 25b1 is the height Ld of the linear rib 22b1. Become. The angle formed by the straight line connecting the center of the first linear rib 24b1 and the center of the second linear rib 25b1 and the straight line parallel to the rotational axis O or the rotational axis O is the inclination angle ⁇ of the linear rib 22b1. It becomes.
  • FIG. 20 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O.
  • FIG. 21 is a front view showing the configuration of the propeller fan 10 of the blower according to the present embodiment. This embodiment is different from the first to third embodiments in the shape of the propeller fan 10. Note that components having the same functions and operations as in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted.
  • the propeller fan 10 of the present embodiment is a so-called bossless type propeller fan that does not include a boss or has a reduced boss.
  • the propeller fan 10 includes a plurality of blades 14 and a plurality of connection portions 15 that connect two blades 14 adjacent in the circumferential direction among the plurality of blades 14.
  • the connecting portion 15 has a plate shape, for example.
  • An edge 15a on the outer peripheral side of the connection portion 15 connects the rear edge 14b of the blade 14 positioned forward in the rotation direction of the propeller fan 10 and the front edge 14c of the blade 14 positioned rearward in the rotation direction. ing.
  • a region on the inner peripheral side with respect to the virtual cylindrical surface C1 centering on the rotation axis O and inscribed in the edge portion 15a corresponds to the shaft portion 16 of the propeller fan 10.
  • the fan guard 20 When viewed in parallel with the rotation axis O, the fan guard 20 is based on the first region 31 disposed so as to overlap the shaft portion 16 and the rotation locus of the outer peripheral edge 14a of the blade 14 on the outer peripheral side of the shaft portion 16. And a second region 32 arranged on the inner peripheral side.
  • the point that the height of the rib 22 in the first region 31 is lower than the height of the rib 22 in the second region 32 is the same as in the first embodiment. According to the present embodiment, the same effect as in the first embodiment can be obtained.
  • Propeller fan 10 of the present embodiment can be combined with fan guard 20 of the second or third embodiment.

Abstract

This blower device is provided with: a propeller fan having a shaft section which is provided on a rotation axis, and having blades which are provided around the shaft section; and a fan guard provided downwind of the propeller fan and having ribs which define a plurality of openings through which air is allowed to flow. When viewed in a direction parallel to the rotation axis, the fan guard has a first region which is disposed overlapping the shaft section, and a second region which is located on the outer peripheral side with respect to the shaft section and the inner peripheral side with respect to the path of rotation of the blades. If the dimension of the ribs in the direction parallel to the rotation axis is defined as the height of the ribs, the height of the ribs in the first region is less than the height of the ribs in the second region.

Description

送風装置及び空気調和装置用室外機Outdoor unit for blower and air conditioner
　本発明は、ファンガードを備えた送風装置及び空気調和装置用室外機に関するものである。 The present invention relates to an air blower equipped with a fan guard and an outdoor unit for an air conditioner.
　特許文献１には、送風ユニットのファンガードが記載されている。このファンガードは、同心配置された多数の環状リブと、周方向に等間隔で配置された多数の放射リブと、を有している。各放射リブ及び各環状リブは、送風ファンからの吹出空気流に沿うように傾斜している。これにより、吹出空気流と放射リブ及び環状リブとの干渉を抑えることができるため、騒音を低減できる。 Patent Document 1 describes a fan guard for a blower unit. This fan guard has many annular ribs arranged concentrically and many radiation ribs arranged at equal intervals in the circumferential direction. Each radiation rib and each annular rib are inclined so as to follow the air flow from the blower fan. Thereby, since interference with a blowing air flow, a radiation rib, and an annular rib can be suppressed, noise can be reduced.
特許第４４０３６９１号公報Japanese Patent No. 4403691
　しかしながら、送風ファンのボスの下流側では、空気の流れの向きが時間的に不規則に変動する。このため、ボスの下流側にリブが設けられている場合、当該リブがどのような傾斜角で傾斜していても、当該リブの下流側の空気の流れには大きな乱れが生じ得る。したがって、上記のようなファンガードの構成では、騒音を十分に低減できないという課題があった。 However, on the downstream side of the boss of the blower fan, the air flow direction fluctuates irregularly in time. For this reason, when the rib is provided on the downstream side of the boss, the air flow on the downstream side of the rib may be greatly disturbed regardless of the inclination angle of the rib. Therefore, the above fan guard configuration has a problem that noise cannot be sufficiently reduced.
　本発明は、上述のような課題を解決するためになされたものであり、騒音をより低減できる送風装置及び空気調和装置用室外機を提供することを目的とする。 The present invention has been made to solve the above-described problems, and an object thereof is to provide a blower and an air conditioner outdoor unit that can further reduce noise.
　本発明に係る送風装置は、回転軸上に設けられた軸部、及び前記軸部の周囲に設けられた翼を有するプロペラファンと、前記プロペラファンの風下側に設けられ、空気を通過させる複数の開口を画定するリブを有するファンガードと、を備え、前記回転軸と平行に見たとき、前記ファンガードは、前記軸部と重なって配置された第１領域と、前記軸部よりも外周側であって前記翼の回転軌跡よりも内周側に配置された第２領域と、を有しており、前記回転軸と平行な方向における前記リブの寸法を前記リブの高さと定義した場合、前記第１領域での前記リブの高さは、前記第２領域での前記リブの高さよりも低いものである。
　本発明に係る空気調和装置用室外機は、本発明に係る送風装置を備えたものである。 The blower according to the present invention includes a shaft portion provided on a rotating shaft, a propeller fan having a blade provided around the shaft portion, and a plurality of devices provided on the leeward side of the propeller fan to allow air to pass therethrough. A fan guard having a rib for defining an opening of the first portion, and when viewed in parallel with the rotation shaft, the fan guard has a first region disposed so as to overlap the shaft portion, and an outer periphery than the shaft portion. And a second region disposed on the inner peripheral side of the rotation trajectory of the blade, and the dimension of the rib in a direction parallel to the rotation axis is defined as the height of the rib The height of the rib in the first region is lower than the height of the rib in the second region.
The outdoor unit for an air conditioner according to the present invention includes the blower according to the present invention.
　本発明では、回転軸と平行に見たとき軸部と重なって配置された第１領域でのリブの高さは、第１領域より外周側に配置された第２領域でのリブの高さよりも低くなっている。このため、第１領域に流入する空気の流れの向きに関わらず、第１領域のリブを当該流れの向きと垂直な平面に投影したときの投影幅を小さくすることができる。したがって、本発明によれば、軸部の下流側で空気の流れの向きが時間的に不規則に変動したとしても、第１領域のリブの下流側で生じる空気の流れの乱れを小さくすることができるため、送風装置の騒音をより低減できる。 In the present invention, the height of the rib in the first region arranged so as to overlap the shaft portion when viewed in parallel with the rotation axis is higher than the height of the rib in the second region arranged on the outer peripheral side from the first region. Is also low. For this reason, irrespective of the direction of the flow of air flowing into the first region, the projection width when the ribs of the first region are projected onto a plane perpendicular to the direction of the flow can be reduced. Therefore, according to the present invention, even if the air flow direction fluctuates irregularly in time on the downstream side of the shaft portion, the turbulence in the air flow that occurs on the downstream side of the ribs in the first region can be reduced. Therefore, the noise of the blower can be further reduced.
本発明の実施の形態１に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。It is a figure which shows typically the structure which cut | disconnected the air blower which concerns on Embodiment 1 of this invention by the plane containing the rotating shaft O. FIG. 本発明の実施の形態１に係る送風装置におけるリブ２２の寸法及び角度の定義を説明する図である。It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る送風装置におけるリブ２２の寸法及び角度の定義を説明する図である。It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る送風装置におけるリブ２２の寸法及び角度の定義を説明する図である。It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る送風装置におけるリブ２２の寸法及び角度の定義を説明する図である。It is a figure explaining the definition of the dimension and angle of the rib 22 in the air blower which concerns on Embodiment 1 of this invention. 線状リブ２２ａの下流側での流れの乱れを説明する図である。It is a figure explaining the disorder of the flow in the downstream of the linear rib 22a. 線状リブ２２ａの下流側での流れの乱れを説明する図である。It is a figure explaining the disorder of the flow in the downstream of the linear rib 22a. 本発明の実施の形態１に係る送風装置を備えた空気調和装置用室外機１００の構成を示す正面図である。It is a front view which shows the structure of the outdoor unit 100 for air conditioning apparatuses provided with the air blower which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る送風装置を備えた空気調和装置用室外機１００の構成を示す正面図である。It is a front view which shows the structure of the outdoor unit 100 for air conditioning apparatuses provided with the air blower which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る送風装置を備えた空気調和装置用室外機１００の構成を示す正面図である。It is a front view which shows the structure of the outdoor unit 100 for air conditioning apparatuses provided with the air blower which concerns on Embodiment 1 of this invention. 本発明の実施の形態１の変形例に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。It is a figure which shows typically the structure which cut | disconnected the air blower which concerns on the modification of Embodiment 1 of this invention by the plane containing the rotating shaft O. FIG. 本発明の実施の形態２に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。It is a figure which shows typically the structure which cut | disconnected the air blower which concerns on Embodiment 2 of this invention by the plane containing the rotating shaft O. FIG. 本発明の実施の形態２に係る送風装置における線状リブ２２ａの下流側での流れの乱れを説明する図である。It is a figure explaining the disturbance of the flow in the downstream of the linear rib 22a in the air blower which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。It is a figure which shows typically the structure which cut | disconnected the air blower which concerns on Embodiment 3 of this invention by the plane containing the rotating shaft O. FIG. 線状リブ２２ａの下流側での流れの乱れを説明する図である。It is a figure explaining the disorder of the flow in the downstream of the linear rib 22a. 線状リブ２２ａの下流側での流れの乱れを説明する図である。It is a figure explaining the disorder of the flow in the downstream of the linear rib 22a. 本発明の実施の形態３の第１変形例に係る送風装置の線状リブ２２ａの構成を模式的に示す図である。It is a figure which shows typically the structure of the linear rib 22a of the air blower which concerns on the 1st modification of Embodiment 3 of this invention. 本発明の実施の形態３の第２変形例に係る送風装置の線状リブ２２ａの構成を模式的に示す図である。It is a figure which shows typically the structure of the linear rib 22a of the air blower which concerns on the 2nd modification of Embodiment 3 of this invention. 本発明の実施の形態３に係る送風装置において、互いに重ならないように配置された第１線状リブ及び第２線状リブを有する線状リブの例を示す図である。In the air blower which concerns on Embodiment 3 of this invention, it is a figure which shows the example of the linear rib which has the 1st linear rib and 2nd linear rib arrange | positioned so that it may not mutually overlap. 本発明の実施の形態４に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。It is a figure which shows typically the structure which cut | disconnected the air blower which concerns on Embodiment 4 of this invention by the plane containing the rotating shaft O. FIG. 本発明の実施の形態４に係る送風装置のプロペラファン１０の構成を示す正面図である。It is a front view which shows the structure of the propeller fan 10 of the air blower which concerns on Embodiment 4 of this invention.
実施の形態１．
　本発明の実施の形態１に係る送風装置について説明する。本実施の形態に係る送風装置は、空気調和装置用室外機、給湯装置用室外機、又は換気装置などに用いられる。図１は、本実施の形態に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。図１において、上方は風上側を表しており、下方は風下側を表している。図１に示すように、本実施の形態に係る送風装置は、プロペラファン１０と、プロペラファン１０を駆動するファンモータ１１と、プロペラファン１０の風下側に設けられたファンガード２０と、を有している。プロペラファン１０は、回転軸Ｏ上に設けられたボス１３（軸部の一例）と、ボス１３の周囲に設けられた複数の翼１４と、を有している。ファンガード２０は、プロペラファン１０の吹出口１２を覆うように設けられている。後述するように、送風装置が空気調和装置用室外機１００に搭載される場合、プロペラファン１０及びファンモータ１１は空気調和装置用室外機１００の筐体１０１内部に設けられ、吹出口１２及びファンガード２０は筐体１０１の前面に設けられる（図８等参照）。 Embodiment 1 FIG.
A blower according to Embodiment 1 of the present invention will be described. The blower according to the present embodiment is used for an air conditioner outdoor unit, a hot water supply outdoor unit, a ventilator, or the like. FIG. 1 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O. In FIG. 1, the upper part represents the windward side, and the lower part represents the leeward side. As shown in FIG. 1, the air blower according to the present embodiment includes a propeller fan 10, a fan motor 11 that drives the propeller fan 10, and a fan guard 20 provided on the leeward side of the propeller fan 10. is doing. The propeller fan 10 includes a boss 13 (an example of a shaft portion) provided on the rotation axis O and a plurality of blades 14 provided around the boss 13. The fan guard 20 is provided so as to cover the air outlet 12 of the propeller fan 10. As will be described later, when the air blower is mounted on the air conditioner outdoor unit 100, the propeller fan 10 and the fan motor 11 are provided inside the casing 101 of the air conditioner outdoor unit 100, and the air outlet 12 and the fan are provided. The guard 20 is provided on the front surface of the housing 101 (see FIG. 8 and the like).
　ファンガード２０は、空気を通過させる複数の開口２１を画定するリブ２２を有している。リブ２２は、プロペラファン１０の回転軸Ｏと平行に見たとき、直線状又は曲線状に延伸した複数の線状リブ２２ａが組み合わされた構成を有している。すなわち、線状リブ２２ａは、リブ２２の一部を構成している。リブ２２は、樹脂製であってもよいし金属製であってもよい。回転軸Ｏと平行に見たとき、ファンガード２０は、ボス１３と重なって配置された第１領域３１と、ボス１３よりも外周側であって翼１４の外周縁１４ａの回転軌跡よりも内周側に配置された第２領域３２と、を有している。第１領域３１でのリブ２２の高さは、第２領域３２でのリブ２２の高さよりも低くなっている。第２領域３２の全域でのリブ２２の高さは一定であってもよい。 The fan guard 20 has ribs 22 that define a plurality of openings 21 through which air passes. The rib 22 has a configuration in which a plurality of linear ribs 22 a extending linearly or curvedly are combined when viewed in parallel with the rotation axis O of the propeller fan 10. That is, the linear rib 22 a constitutes a part of the rib 22. The ribs 22 may be made of resin or metal. When viewed in parallel with the rotation axis O, the fan guard 20 has a first region 31 that is disposed so as to overlap the boss 13, and is located on the outer peripheral side of the boss 13 and within the rotation locus of the outer peripheral edge 14 a of the blade 14. And a second region 32 disposed on the circumferential side. The height of the rib 22 in the first region 31 is lower than the height of the rib 22 in the second region 32. The height of the rib 22 in the entire second region 32 may be constant.
　図２～図５は、本実施の形態に係る送風装置におけるリブ２２の寸法及び角度の定義を説明する図である。図２～図５では、１つの線状リブ２２ａをその延伸方向と垂直に切断した断面構成を示している。図２～図５における上下方向は回転軸Ｏと平行な方向を表しており、上方は風上側を表しており、下方は風下側を表している。 2 to 5 are diagrams for explaining the definition of the dimensions and angles of the ribs 22 in the blower according to the present embodiment. 2 to 5 show cross-sectional configurations in which one linear rib 22a is cut perpendicular to the extending direction. The vertical direction in FIGS. 2 to 5 represents a direction parallel to the rotation axis O, the upper side represents the windward side, and the lower side represents the leeward side.
　図２に示す線状リブ２２ａは、一方向に長い長円状の断面形状を有している。線状リブ２２ａの延伸方向と垂直な断面において、線状リブ２２ａの長径方向は、回転軸Ｏと概ね平行になっている。本実施の形態では、回転軸Ｏと平行な方向における線状リブ２２ａの寸法のことを線状リブ２２ａの高さＬｄと定義する。線状リブ２２ａの高さＬｄは、線状リブ２２ａの風上側の端点２２ａ１と、線状リブ２２ａの風下側の端点２２ａ２と、の間の回転軸Ｏと平行な方向における距離と等しい。ある領域でのリブ２２の高さとは、当該領域に存在する線状リブ２２ａの高さＬｄのことである。また、線状リブ２２ａの延伸方向と垂直な断面において、回転軸Ｏと垂直な方向における線状リブ２２ａの寸法の最大値のことを線状リブ２２ａの幅Ｌｗと定義する。 The linear rib 22a shown in FIG. 2 has an oval cross-sectional shape that is long in one direction. In the cross section perpendicular to the extending direction of the linear rib 22a, the major axis direction of the linear rib 22a is substantially parallel to the rotation axis O. In the present embodiment, the dimension of the linear rib 22a in the direction parallel to the rotation axis O is defined as the height Ld of the linear rib 22a. The height Ld of the linear rib 22a is equal to the distance in the direction parallel to the rotation axis O between the end point 22a1 on the leeward side of the linear rib 22a and the end point 22a2 on the leeward side of the linear rib 22a. The height of the rib 22 in a certain region is the height Ld of the linear rib 22a existing in the region. In addition, in the cross section perpendicular to the extending direction of the linear rib 22a, the maximum value of the dimension of the linear rib 22a in the direction perpendicular to the rotation axis O is defined as the width Lw of the linear rib 22a.
　図３に示す線状リブ２２ａは、一方向に長い長方形状の断面形状を有している。線状リブ２２ａの延伸方向と垂直な断面において、線状リブ２２ａの長径方向は、回転軸Ｏと概ね平行になっている。線状リブ２２ａの高さＬｄは、風上側の端辺２２ａ３の中心２２ａ５と、風下側の端辺２２ａ４の中心２２ａ６と、の間の回転軸Ｏと平行な方向における距離と等しい。 The linear rib 22a shown in FIG. 3 has a rectangular cross-sectional shape that is long in one direction. In the cross section perpendicular to the extending direction of the linear rib 22a, the major axis direction of the linear rib 22a is substantially parallel to the rotation axis O. The height Ld of the linear rib 22a is equal to the distance in the direction parallel to the rotation axis O between the center 22a5 of the leeward side edge 22a3 and the center 22a6 of the leeward side edge 22a4.
　図４に示す線状リブ２２ａは、一方向に長い長円状の断面形状を有している。線状リブ２２ａの高さＬｄは、風上側の端点２２ａ１と、風下側の端点２２ａ２と、の間の回転軸Ｏと平行な方向における距離と等しい。また、線状リブ２２ａの延伸方向と垂直な断面において、線状リブ２２ａの長径方向は、回転軸Ｏ又は回転軸Ｏと平行な直線に対して傾いている。線状リブ２２ａの延伸方向と垂直な断面において、長径方向に平行な直線（例えば、端点２２ａ１と端点２２ａ２とを結ぶ直線）と、回転軸Ｏ又は回転軸Ｏと平行な直線と、のなす角度を線状リブ２２ａの傾斜角θと定義する。 The linear rib 22a shown in FIG. 4 has an oval cross-sectional shape that is long in one direction. The height Ld of the linear rib 22a is equal to the distance between the windward end point 22a1 and the leeward end point 22a2 in the direction parallel to the rotation axis O. Further, in the cross section perpendicular to the extending direction of the linear rib 22 a, the major axis direction of the linear rib 22 a is inclined with respect to the rotation axis O or a straight line parallel to the rotation axis O. In a cross section perpendicular to the extending direction of the linear rib 22a, an angle formed by a straight line parallel to the major axis direction (for example, a straight line connecting the end point 22a1 and the end point 22a2) and a straight line parallel to the rotation axis O or the rotation axis O Is defined as the inclination angle θ of the linear rib 22a.
　図５に示す線状リブ２２ａは、一方向に長い平行四辺形状の断面形状を有している。線状リブ２２ａの高さＬｄは、風上側の端辺２２ａ３の中心２２ａ５と、風下側の端辺２２ａ４の中心２２ａ６と、の間の回転軸Ｏと平行な方向における距離と等しい。また、線状リブ２２ａの延伸方向と垂直な断面において、線状リブ２２ａの長径方向は、回転軸Ｏ又は回転軸Ｏと平行な直線に対して傾斜角θで傾いている。 The linear rib 22a shown in FIG. 5 has a parallelogram-shaped cross section that is long in one direction. The height Ld of the linear rib 22a is equal to the distance in the direction parallel to the rotation axis O between the center 22a5 of the leeward side edge 22a3 and the center 22a6 of the leeward side edge 22a4. In the cross section perpendicular to the extending direction of the linear rib 22a, the major axis direction of the linear rib 22a is inclined at an inclination angle θ with respect to the rotation axis O or a straight line parallel to the rotation axis O.
　プロペラファン１０から吹き出される空気における局所的な流れの向きは、翼１４の径方向位置に応じて、回転軸Ｏに対し傾斜している。第２領域３２に存在する線状リブ２２ａは、空気の流れの向きに合わせて傾斜するように形成されている。これにより、プロペラファン１０から吹き出される空気の流れを線状リブ２２ａに沿わせることができるため、線状リブ２２ａの下流側での流れの乱れを抑制することができる。しかしながら、ボス１３の下流側での空気の流れの向きＦ１（図１参照）は、時間的に不規則に変動する。このため、ボス１３の下流側に位置する第１領域３１では、線状リブ２２ａがどのような向きにどのような傾斜角で傾斜していても、空気の流れを常に線状リブ２２ａに沿わせることは困難である。したがって、第２領域３２に存在する線状リブ２２ａの下流側では、空気の流れに大きな乱れが生じ得る。 The direction of local flow in the air blown from the propeller fan 10 is inclined with respect to the rotation axis O according to the radial position of the blade 14. The linear rib 22a existing in the second region 32 is formed so as to be inclined in accordance with the direction of air flow. Thereby, since the flow of the air blown out from the propeller fan 10 can be made to follow the linear rib 22a, the disturbance of the flow in the downstream of the linear rib 22a can be suppressed. However, the air flow direction F1 (see FIG. 1) on the downstream side of the boss 13 varies irregularly in time. For this reason, in the first region 31 located on the downstream side of the boss 13, the flow of air always follows the linear rib 22a regardless of the direction and the inclination angle of the linear rib 22a. It is difficult to make it. Therefore, on the downstream side of the linear rib 22a existing in the second region 32, the air flow can be greatly disturbed.
　これに対し、本実施の形態では、ファンガード２０の第１領域３１でのリブ２２の高さは、第２領域３２でのリブ２２の高さよりも低くなっている。このため、第１領域３１では、空気の流れの向きと線状リブ２２ａの長径方向とが一致していなかったとしても、流れが衝突する線状リブ２２ａの投影幅を小さくすることができる。したがって、本実施の形態によれば、線状リブ２２ａの下流側での空気の流れの乱れを小さくすることができる。 On the other hand, in the present embodiment, the height of the rib 22 in the first region 31 of the fan guard 20 is lower than the height of the rib 22 in the second region 32. For this reason, in the 1st field 31, even if the direction of air flow and the major axis direction of linear rib 22a do not correspond, the projection width of linear rib 22a which a flow collides can be made small. Therefore, according to the present embodiment, the disturbance of the air flow on the downstream side of the linear rib 22a can be reduced.
　図６及び図７は、線状リブ２２ａの下流側での流れの乱れを説明する図である。図６は、線状リブ２２ａの高さが相対的に高い場合を示し、図７は、線状リブ２２ａの高さが相対的に低い場合を示している。図６及び図７における上下方向は回転軸Ｏと平行な方向を表しており、上方は風上側を表しており、下方は風下側を表している。図６に示すように、線状リブ２２ａの高さが相対的に高い場合、空気の流れの向きＦ１と線状リブ２２ａの長径方向とが一致していないときには、線状リブ２２ａを流れの向きと垂直な平面に投影したときの投影幅が大きくなる。このため、線状リブ２２ａの下流側では大きな剥離が生じる。一方、図７に示すように、線状リブ２２ａの高さが相対的に低い場合、空気の流れの向きＦ１と線状リブ２２ａとが一致していなかったとしても、線状リブ２２ａを流れの向きと垂直な平面に投影したときの投影幅を小さくすることができる。したがって、線状リブ２２ａの下流側で生じる剥離を小さくすることができる。 6 and 7 are diagrams for explaining the flow disturbance on the downstream side of the linear rib 22a. FIG. 6 shows a case where the height of the linear rib 22a is relatively high, and FIG. 7 shows a case where the height of the linear rib 22a is relatively low. The vertical direction in FIGS. 6 and 7 represents a direction parallel to the rotation axis O, the upper side represents the windward side, and the lower side represents the leeward side. As shown in FIG. 6, when the height of the linear rib 22a is relatively high, when the air flow direction F1 and the major axis direction of the linear rib 22a do not coincide with each other, the linear rib 22a flows through the linear rib 22a. The projection width when projected onto a plane perpendicular to the direction becomes large. For this reason, large peeling occurs on the downstream side of the linear rib 22a. On the other hand, as shown in FIG. 7, when the height of the linear rib 22a is relatively low, even if the air flow direction F1 and the linear rib 22a do not match, the linear rib 22a flows. The projection width when projected onto a plane perpendicular to the direction can be reduced. Therefore, peeling that occurs on the downstream side of the linear rib 22a can be reduced.
　図８～図１０は、本実施の形態に係る送風装置を備えた空気調和装置用室外機１００の構成を示す正面図である。図８～図１０では、本実施の形態におけるリブ２２の形状の例を併せて示している。図８～図１０では、リブ２２の第１領域３１を白抜きで示しており、リブ２２の第２領域３２をハッチングで示している。 8 to 10 are front views showing the configuration of the air conditioner outdoor unit 100 provided with the blower according to the present embodiment. 8 to 10 also show examples of the shape of the rib 22 in the present embodiment. 8 to 10, the first region 31 of the rib 22 is shown in white, and the second region 32 of the rib 22 is shown in hatching.
　図８～図１０に示すように、空気調和装置用室外機１００は、筐体１０１と、筐体１０１内に収容されたプロペラファン１０と、を有している。筐体１０１の前面には、リブ２２を有するファンガード２０が設けられている。図８～図１０では、ファンガード２０のうちリブ２２のみを示している。筐体１０１内には、冷凍サイクル装置の一部を構成し、冷媒と室外空気との熱交換を行う室外熱交換器（図示せず）が収容されている。室外熱交換器は、プロペラファン１０による空気の流れにおいて、プロペラファン１０よりも上流側に配置されている。 As shown in FIGS. 8 to 10, the air conditioner outdoor unit 100 includes a casing 101 and a propeller fan 10 accommodated in the casing 101. A fan guard 20 having ribs 22 is provided on the front surface of the housing 101. 8 to 10, only the rib 22 of the fan guard 20 is shown. In the housing 101, an outdoor heat exchanger (not shown) that constitutes a part of the refrigeration cycle apparatus and performs heat exchange between the refrigerant and the outdoor air is accommodated. The outdoor heat exchanger is arranged upstream of the propeller fan 10 in the air flow by the propeller fan 10.
　図８に示す例では、リブ２２は、左右方向に延伸した複数の直線状の線状リブ２２ａを有している。図８では、８つの線状リブ２２ａを示している。リブ２２は、上下方向に延伸した複数の直線状の線状リブ２２ａを有していてもよい。図９に示す例では、リブ２２は、ファンガード２０の中心部（例えば、プロペラファン１０の回転軸Ｏ）から外周側に向かって放射状に延伸した複数の直線状又は曲線状の線状リブ２２ａを有している。図９では、８つの線状リブ２２ａを示している。図１０に示す例では、リブ２２は、ファンガード２０の中心部（例えば、プロペラファン１０の回転軸Ｏ）を共通の中心として同心円状に配置された複数の線状リブ２２ａを有している。図１０では、５つの線状リブ２２ａを示している。本実施の形態のファンガード２０は、図８～図１０に示したリブ２２のいずれか１つを単独で有していてもよいし、図８～図１０に示したリブ２２のいずれか２つ以上が組み合わされた構成を有していてもよい。 In the example shown in FIG. 8, the rib 22 has a plurality of linear linear ribs 22a extending in the left-right direction. In FIG. 8, eight linear ribs 22a are shown. The rib 22 may have a plurality of linear linear ribs 22a extending in the vertical direction. In the example shown in FIG. 9, the ribs 22 are a plurality of linear or curved linear ribs 22a that extend radially from the center of the fan guard 20 (for example, the rotation axis O of the propeller fan 10) toward the outer peripheral side. have. In FIG. 9, eight linear ribs 22a are shown. In the example illustrated in FIG. 10, the rib 22 includes a plurality of linear ribs 22 a that are concentrically arranged with the central portion of the fan guard 20 (for example, the rotation axis O of the propeller fan 10) as a common center. . In FIG. 10, five linear ribs 22a are shown. The fan guard 20 of the present embodiment may have any one of the ribs 22 shown in FIGS. 8 to 10, or any two of the ribs 22 shown in FIGS. You may have the structure where two or more were combined.
　図１１は、本実施の形態の変形例に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。図１１に示すように、本変形例のファンガード２０は、中心部に設けられた平板状の平板部２３と、平板部２３の周囲に設けられたリブ２２と、を有している。平板部２３は、回転軸Ｏと平行に見たとき、ボス１３よりも小径となっている。回転軸Ｏと平行に見たとき、ボス１３の一部は平板部２３と重なっており、ボス１３の他の一部は平板部２３からはみ出している。リブ２２の少なくとも一部は、ボス１３と重なる第１領域３１に形成されている。本変形例においても、第１領域３１でのリブ２２の高さは、第２領域３２でのリブ２２の高さよりも低くなっている。 FIG. 11 is a diagram schematically illustrating a configuration in which a blower according to a modification of the present embodiment is cut along a plane including the rotation axis O. As shown in FIG. 11, the fan guard 20 of the present modification includes a flat plate portion 23 provided at the center portion and ribs 22 provided around the flat plate portion 23. The flat plate portion 23 has a smaller diameter than the boss 13 when viewed in parallel with the rotation axis O. When viewed in parallel with the rotation axis O, a part of the boss 13 overlaps the flat plate part 23, and the other part of the boss 13 protrudes from the flat plate part 23. At least a part of the rib 22 is formed in the first region 31 overlapping the boss 13. Also in this modification, the height of the rib 22 in the first region 31 is lower than the height of the rib 22 in the second region 32.
　以上説明したように、本実施の形態に係る送風装置は、回転軸Ｏ上に設けられたボス１３、及びボス１３の周囲に設けられた翼１４を有するプロペラファン１０と、プロペラファン１０の風下側に設けられ、空気を通過させる複数の開口２１を画定するリブ２２を有するファンガード２０と、を備えている。回転軸Ｏと平行に見たとき、ファンガード２０は、ボス１３と重なって配置された第１領域３１と、ボス１３よりも外周側であって翼１４の外周縁１４ａの回転軌跡よりも内周側に配置された第２領域３２と、を有している。回転軸Ｏと平行な方向におけるリブ２２の寸法をリブ２２の高さと定義した場合、第１領域３１でのリブ２２の高さ（例えば、第１領域３１に存在する線状リブ２２ａの高さＬｄ）は、第２領域３２でのリブ２２の高さ（例えば、第２領域３２に存在する線状リブ２２ａの高さＬｄ）よりも低い。ここで、ボス１３は軸部の一例である。 As described above, the blower according to the present embodiment includes the propeller fan 10 having the boss 13 provided on the rotating shaft O and the wings 14 provided around the boss 13, and the lee of the propeller fan 10. And a fan guard 20 having ribs 22 provided on the side and defining a plurality of openings 21 through which air passes. When viewed in parallel with the rotation axis O, the fan guard 20 has a first region 31 that is disposed so as to overlap the boss 13, and is located on the outer peripheral side of the boss 13 and within the rotation locus of the outer peripheral edge 14 a of the blade 14. And a second region 32 disposed on the circumferential side. When the dimension of the rib 22 in the direction parallel to the rotation axis O is defined as the height of the rib 22, the height of the rib 22 in the first region 31 (for example, the height of the linear rib 22a existing in the first region 31). Ld) is lower than the height of the rib 22 in the second region 32 (for example, the height Ld of the linear rib 22a existing in the second region 32). Here, the boss 13 is an example of a shaft portion.
　この構成によれば、ファンガード２０の第１領域３１に流入する空気の流れの向きに関わらず、第１領域３１のリブ２２を当該流れの向きと垂直な平面に投影したときの投影幅を小さくすることができる。したがって、本実施の形態によれば、ボス１３の下流側で空気の流れの向きが時間的に不規則に変動したとしても、第１領域３１のリブ２２の下流側で生じる空気の流れの乱れを小さくすることができるため、送風装置の騒音をより低減できる。 According to this configuration, the projection width when the rib 22 of the first region 31 is projected onto a plane perpendicular to the direction of the flow regardless of the direction of the flow of air flowing into the first region 31 of the fan guard 20. Can be small. Therefore, according to the present embodiment, even if the direction of the air flow on the downstream side of the boss 13 fluctuates irregularly in time, the disturbance of the air flow that occurs on the downstream side of the rib 22 in the first region 31. Therefore, the noise of the blower can be further reduced.
　また、本実施の形態に係る送風装置において、第２領域３２の全域でのリブ２２の高さは一定であってもよい。第２領域３２に流入する空気の流れの向きには、時間的な変動が少ない。このため、線状リブ２２ａが空気の流れの向きに合わせて傾斜するように形成されていれば、第２領域３２の全域でのリブ２２の高さが一定であっても、リブ２２の下流側での流れの乱れを抑制することができる。 Moreover, in the air blower according to the present embodiment, the height of the ribs 22 in the entire second region 32 may be constant. There is little temporal variation in the direction of the air flow flowing into the second region 32. For this reason, if the linear rib 22a is formed so as to be inclined in accordance with the direction of the air flow, even if the height of the rib 22 throughout the second region 32 is constant, the downstream side of the rib 22 Disturbance of the flow on the side can be suppressed.
　また、本実施の形態に係る空気調和装置用室外機１００は、上記送風装置を備えるものである。この構成によれば、空気調和装置用室外機１００において、上記と同様の効果を得ることができる。 Moreover, the outdoor unit 100 for air conditioning apparatuses which concerns on this Embodiment is provided with the said air blower. According to this configuration, the same effect as described above can be obtained in the air conditioner outdoor unit 100.
　本実施の形態では、図１等に示したように、第１領域３１の全域でのリブ２２の高さが、第２領域３２でのリブ２２の高さよりも低いことが望ましい。ただし、第１領域３１の一部でのリブ２２の高さが第２領域３２でのリブ２２の高さよりも低ければ、上述の効果が得られる。すなわち、第１領域３１の一部でのリブ２２の高さが第２領域３２でのリブ２２の高さよりも低ければ、第１領域３１の他の一部でのリブ２２の高さは、第２領域３２でのリブの高さと同一又はそれより高くてもよい。 In the present embodiment, as shown in FIG. 1 and the like, it is desirable that the height of the ribs 22 in the entire first region 31 is lower than the height of the ribs 22 in the second region 32. However, if the height of the rib 22 in a part of the first region 31 is lower than the height of the rib 22 in the second region 32, the above-described effect can be obtained. That is, if the height of the rib 22 in a part of the first region 31 is lower than the height of the rib 22 in the second region 32, the height of the rib 22 in the other part of the first region 31 is The height of the rib in the second region 32 may be the same as or higher than that.
実施の形態２．
　本発明の実施の形態２に係る送風装置について説明する。図１２は、本実施の形態に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。本実施の形態は、第１領域３１のリブ２２の形状において実施の形態１と異なっている。なお、実施の形態１と同一の機能及び作用を有する構成要素については、同一の符号を付してその説明を省略する。図１２に示すように、第１領域３１に存在する複数の線状リブ２２ａのそれぞれは、円形状の断面形状を有している。これらの線状リブ２２ａのそれぞれは、例えば円柱状の形状を有している。第１領域３１に存在する線状リブ２２ａの幅は、当該線状リブ２２ａの高さと同一となる。第１領域３１に存在する線状リブ２２ａの幅は、当該線状リブ２２ａの高さより大きくてもよい。 Embodiment 2. FIG.
A blower according to Embodiment 2 of the present invention will be described. FIG. 12 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O. The present embodiment is different from the first embodiment in the shape of the rib 22 in the first region 31. In addition, about the component which has the function and effect | action same as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted. As shown in FIG. 12, each of the plurality of linear ribs 22a existing in the first region 31 has a circular cross-sectional shape. Each of these linear ribs 22a has, for example, a cylindrical shape. The width of the linear rib 22a existing in the first region 31 is the same as the height of the linear rib 22a. The width of the linear rib 22a existing in the first region 31 may be larger than the height of the linear rib 22a.
　図１３は、本実施の形態に係る送風装置における線状リブ２２ａの下流側での流れの乱れを説明する図である。図１３における上下方向は回転軸Ｏと平行な方向を表しており、上方は風上側を表しており、下方は風下側を表している。図１３に示すように、線状リブ２２ａをある平面で切断した断面形状が円形状である場合、流入する空気の流れの向きに関わらず、線状リブ２２ａの投影幅をより小さくできる。このため、ボス１３の下流側で空気の流れの向きが変動したとしても、線状リブ２２ａの下流側で生じる剥離をより小さくすることができる。また、上記平面内での空気の流れに対しては、当該流れの向きに関わらず、線状リブ２２ａの投影幅を同一にすることができる。このため、空気の流れの向きがどのように変動したとしても、線状リブ２２ａの下流側で生じる流れの乱れを小さく抑えることができる。 FIG. 13 is a diagram for explaining the flow disturbance on the downstream side of the linear rib 22a in the blower according to the present embodiment. The vertical direction in FIG. 13 represents a direction parallel to the rotation axis O, the upper side represents the windward side, and the lower side represents the leeward side. As shown in FIG. 13, when the cross-sectional shape obtained by cutting the linear rib 22a along a certain plane is circular, the projected width of the linear rib 22a can be made smaller regardless of the direction of the flow of air flowing in. For this reason, even if the direction of the air flow fluctuates on the downstream side of the boss 13, the separation that occurs on the downstream side of the linear rib 22a can be further reduced. Moreover, with respect to the air flow in the plane, the projection width of the linear rib 22a can be made the same regardless of the direction of the flow. For this reason, no matter how the direction of the air flow fluctuates, the turbulence of the flow that occurs on the downstream side of the linear rib 22a can be kept small.
　以上説明したように、本実施の形態に係る送風装置は、第１領域３１でのリブ２２は、円形状の断面形状を有している。この構成によれば、ボス１３の下流側で空気の流れの向きが変動したとしても、線状リブ２２ａの下流側で生じる剥離をより小さくすることができる。 As described above, in the air blower according to the present embodiment, the rib 22 in the first region 31 has a circular cross-sectional shape. According to this configuration, even if the direction of the air flow fluctuates on the downstream side of the boss 13, the separation that occurs on the downstream side of the linear rib 22a can be further reduced.
　また、本実施の形態に係る送風装置は、回転軸Ｏと垂直であってかつリブ２２の延伸方向と垂直な方向におけるリブ２２の寸法をリブ２２の幅と定義した場合、第１領域３１でのリブ２２の幅（例えば、第１領域３１に存在する線状リブ２２ａの幅）は、当該リブの高さ（例えば、当該線状リブ２２ａの高さ）と同一又はそれより大きい。この構成によれば、ボス１３の下流側で空気の流れの向きが変動したとしても、線状リブ２２ａの下流側で生じる剥離をより小さくすることができる。 Further, in the blower according to the present embodiment, when the dimension of the rib 22 in the direction perpendicular to the rotation axis O and perpendicular to the extending direction of the rib 22 is defined as the width of the rib 22, The width of the rib 22 (for example, the width of the linear rib 22a existing in the first region 31) is equal to or greater than the height of the rib (for example, the height of the linear rib 22a). According to this configuration, even if the direction of the air flow fluctuates on the downstream side of the boss 13, the separation that occurs on the downstream side of the linear rib 22a can be further reduced.
実施の形態３．
　本発明の実施の形態３に係る送風装置について説明する。図１４は、本実施の形態に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。本実施の形態は、第２領域３２のリブ２２の形状において実施の形態２と異なっている。なお、実施の形態１又は２と同一の機能及び作用を有する構成要素については、同一の符号を付してその説明を省略する。 Embodiment 3 FIG.
A blower according to Embodiment 3 of the present invention will be described. FIG. 14 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O. The present embodiment is different from the second embodiment in the shape of the rib 22 in the second region 32. In addition, about the component which has the function and effect | action same as Embodiment 1 or 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
　図１４に示すように、第２領域３２のリブ２２は、回転軸Ｏと平行に見たとき互いに重なって配置された第１リブ２４及び第２リブ２５を有している。第２リブ２５は、第１リブ２４の風下側に配置されている。第１リブ２４は、回転軸Ｏと平行に見たとき、直線状又は曲線状に延伸した複数の第１線状リブ２４ａが組み合わされた構成を有している。複数の第１線状リブ２４ａのそれぞれは、円形状の断面形状を有している。第２リブ２５は、回転軸Ｏと平行に見たとき、複数の第１線状リブ２４ａに沿って直線状又は曲線状に延伸した複数の第２線状リブ２５ａが組み合わされた構成を有している。複数の第２線状リブ２５ａのそれぞれは、円形状の断面形状を有している。 As shown in FIG. 14, the rib 22 in the second region 32 has a first rib 24 and a second rib 25 that are disposed so as to overlap each other when viewed in parallel with the rotation axis O. The second rib 25 is disposed on the leeward side of the first rib 24. The first rib 24 has a configuration in which a plurality of first linear ribs 24 a extending linearly or curvedly when viewed in parallel with the rotation axis O are combined. Each of the plurality of first linear ribs 24a has a circular cross-sectional shape. The second rib 25 has a configuration in which a plurality of second linear ribs 25a extending linearly or curvedly along the plurality of first linear ribs 24a are combined when viewed in parallel with the rotation axis O. is doing. Each of the plurality of second linear ribs 25a has a circular cross-sectional shape.
　第２領域３２に存在する複数の線状リブ２２ａのそれぞれは、回転軸Ｏと平行に見たとき互いに重なって配置された第１線状リブ２４ａ及び第２線状リブ２５ａを有している。このような場合、線状リブ２２ａの延伸方向と垂直な断面において、第１線状リブ２４ａの風上側の端点と、第２線状リブ２５ａの風下側の端点と、の間の回転軸Ｏと平行な方向における距離が線状リブ２２ａの高さとなる。また、線状リブ２２ａの延伸方向と垂直な断面において、第１線状リブ２４ａの中心と第２線状リブ２５ａの中心とを結ぶ直線と、回転軸Ｏ又は回転軸Ｏと平行な直線と、のなす角度が線状リブ２２ａの傾斜角となる。 Each of the plurality of linear ribs 22a existing in the second region 32 has a first linear rib 24a and a second linear rib 25a that are arranged so as to overlap each other when viewed in parallel with the rotation axis O. . In such a case, in the cross section perpendicular to the extending direction of the linear rib 22a, the rotation axis O between the end point on the leeward side of the first linear rib 24a and the end point on the leeward side of the second linear rib 25a. The distance in a direction parallel to the height is the height of the linear rib 22a. Further, in a cross section perpendicular to the extending direction of the linear rib 22a, a straight line connecting the center of the first linear rib 24a and the center of the second linear rib 25a, and a straight line parallel to the rotational axis O or the rotational axis O Is an inclination angle of the linear rib 22a.
　線状リブ２２ａを構成する第１線状リブ２４ａ及び第２線状リブ２５ａの断面積は互いに異なっていてもよい。第１線状リブ２４ａ及び第２線状リブ２５ａの少なくとも一方の断面積は、第１領域３１に存在する線状リブ２２ａの断面積と同一であってもよい。線状リブ２２ａは、それぞれ円形状の断面形状を有する３つ以上の線状リブが互いに重なって配置された構成を有していてもよい。 The cross-sectional areas of the first linear rib 24a and the second linear rib 25a constituting the linear rib 22a may be different from each other. The cross-sectional area of at least one of the first linear rib 24 a and the second linear rib 25 a may be the same as the cross-sectional area of the linear rib 22 a existing in the first region 31. The linear rib 22a may have a configuration in which three or more linear ribs each having a circular cross-sectional shape are arranged to overlap each other.
　図１５及び図１６は、線状リブ２２ａの下流側での流れの乱れを説明する図である。図１５は、線状リブ２２ａが長円状の断面形状を有する場合を示し、図１６は、本実施の形態のように線状リブ２２ａが第１線状リブ２４ａ及び第２線状リブ２５ａを有する場合を示している。図１５、図１６及び後述する図１７～図１９において、上下方向は回転軸Ｏと平行な方向を表しており、上方は風上側を表しており、下方は風下側を表している。 15 and 16 are diagrams for explaining the flow disturbance on the downstream side of the linear rib 22a. FIG. 15 shows a case where the linear rib 22a has an oval cross-sectional shape, and FIG. 16 shows that the linear rib 22a is the first linear rib 24a and the second linear rib 25a as in the present embodiment. Is shown. In FIGS. 15 and 16 and FIGS. 17 to 19 to be described later, the vertical direction represents a direction parallel to the rotation axis O, the upper side represents the windward side, and the lower side represents the leeward side.
　図１５に示すように、線状リブ２２ａが長円状の断面形状を有する場合、線状リブ２２ａの傾斜に沿わない向きで流入した空気は、線状リブ２２ａに衝突した後、線状リブ２２ａの上流側端面及び下流側端面に沿って回り込む。上流側端面及び下流側端面では曲率の変化が大きいため、回り込んだ空気は上流側端面及び下流側端面から剥離する。これにより、線状リブ２２ａの下流側の空気の流れには、線状リブ２２ａの投影幅と同程度の幅で乱れが生じる。したがって、送風装置の騒音が大きくなっていた。 As shown in FIG. 15, when the linear rib 22a has an oval cross-sectional shape, the air flowing in the direction not following the inclination of the linear rib 22a collides with the linear rib 22a, and then the linear rib It wraps around along the upstream end surface and the downstream end surface of 22a. Since the curvature change is large at the upstream end surface and the downstream end surface, the entrained air is separated from the upstream end surface and the downstream end surface. As a result, the air flow downstream of the linear rib 22a is disturbed with the same width as the projected width of the linear rib 22a. Therefore, the noise of the blower has been increased.
　これに対し、図１６に示す本実施の形態では、線状リブ２２ａを構成する第１線状リブ２４ａ及び第２線状リブ２５ａがそれぞれ円形状の断面形状を有している。線状リブ２２ａの傾斜に沿わない向きで流入した空気は、第１線状リブ２４ａ及び第２線状リブ２５ａに衝突した後、第１線状リブ２４ａの上流側端面及び第２線状リブ２５ａの下流側端面に沿って回り込む。第１線状リブ２４ａの上流側端面及び第２線状リブ２５ａの下流側端面はいずれも一定の曲率を有していることから、回り込んだ空気は各端面に付着して流れやすくなり、剥離が生じにくくなる。これにより、線状リブ２２ａの下流側で生じる流れの乱れの幅を線状リブ２２ａの投影幅よりも狭くすることができる。したがって、送風装置を低騒音化することができる。 On the other hand, in the present embodiment shown in FIG. 16, the first linear rib 24a and the second linear rib 25a constituting the linear rib 22a each have a circular cross-sectional shape. The air that has flowed in the direction not following the inclination of the linear rib 22a collides with the first linear rib 24a and the second linear rib 25a, and then the upstream end face and the second linear rib of the first linear rib 24a. It goes around along the downstream end face of 25a. Since both the upstream end face of the first linear rib 24a and the downstream end face of the second linear rib 25a have a certain curvature, the wraparound air easily adheres to each end face and flows. Peeling is less likely to occur. Thereby, the width | variety of the disturbance of the flow produced in the downstream of the linear rib 22a can be made narrower than the projection width | variety of the linear rib 22a. Therefore, the noise of the blower can be reduced.
　図１７は、本実施の形態の第１変形例に係る送風装置の線状リブ２２ａの構成を模式的に示す図である。第１線状リブ２４ａ及び第２線状リブ２５ａに鋼線が用いられる場合、錆の防止のためのコーティングが施されることがある。図１７に示すように、コーティングが施された線状リブ２２ａは、第１線状リブ２４ａ及び第２線状リブ２５ａと、第１線状リブ２４ａ及び第２線状リブ２５ａの表面に形成されたコーティング膜２６と、を有する。線状リブ２２ａの断面形状はピーナッツ形状となる。このような場合であっても、線状リブ２２ａの上流側端面及び下流側端面のそれぞれが円弧状であれば、上記と同様の効果が得られる。 FIG. 17 is a diagram schematically showing the configuration of the linear rib 22a of the air blower according to the first modification of the present embodiment. When a steel wire is used for the first linear rib 24a and the second linear rib 25a, a coating for preventing rust may be applied. As shown in FIG. 17, the coated linear ribs 22a are formed on the surfaces of the first linear ribs 24a and the second linear ribs 25a and the first linear ribs 24a and the second linear ribs 25a. Coating film 26. The cross-sectional shape of the linear rib 22a is a peanut shape. Even in such a case, the same effect as described above can be obtained if each of the upstream end surface and the downstream end surface of the linear rib 22a has an arc shape.
　図１８は、本実施の形態の第２変形例に係る送風装置の線状リブ２２ａの構成を模式的に示す図である。図１８に示すように、第１線状リブ２４ａ及び第２線状リブ２５ａは、隙間２７を介して離れていてもよい。この場合であっても、線状リブ２２ａの延伸方向と垂直な断面において、第１線状リブ２４ａの風上側の端点と、第２線状リブ２５ａの風下側の端点と、の間の回転軸Ｏと平行な方向における距離が線状リブ２２ａの高さＬｄとなる。また、線状リブ２２ａの延伸方向と垂直な断面において、第１線状リブ２４ａの中心と第２線状リブ２５ａの中心とを結ぶ直線と、回転軸Ｏ又は回転軸Ｏと平行な直線と、のなす角度が線状リブ２２ａの傾斜角θとなる。 FIG. 18 is a diagram schematically showing the configuration of the linear rib 22a of the blower according to the second modification of the present embodiment. As shown in FIG. 18, the first linear rib 24 a and the second linear rib 25 a may be separated via a gap 27. Even in this case, rotation between the end point on the leeward side of the first linear rib 24a and the end point on the leeward side of the second linear rib 25a in the cross section perpendicular to the extending direction of the linear rib 22a. The distance in the direction parallel to the axis O is the height Ld of the linear rib 22a. Further, in a cross section perpendicular to the extending direction of the linear rib 22a, a straight line connecting the center of the first linear rib 24a and the center of the second linear rib 25a, and a straight line parallel to the rotational axis O or the rotational axis O Is an inclination angle θ of the linear rib 22a.
　図１８に示す構成では、線状リブ２２ａの傾斜に沿わない向きで空気が流入したとすると、第１線状リブ２４ａ及び第２線状リブ２５ａに衝突した空気の一部が隙間２７を通過する。このため、線状リブ２２ａの下流側での流れの乱れをさらに小さくすることができる。 In the configuration shown in FIG. 18, if air flows in a direction that does not follow the inclination of the linear rib 22a, a part of the air that collides with the first linear rib 24a and the second linear rib 25a passes through the gap 27. To do. For this reason, the turbulence of the flow on the downstream side of the linear rib 22a can be further reduced.
　以上説明したように、本実施の形態に係る送風装置において、第２領域３２でのリブ２２（例えば、線状リブ２２ａ）は、回転軸Ｏと平行に見たとき互いに重なって配置された第１リブ（例えば、第１線状リブ２４ａ）及び第２リブ（例えば、第２線状リブ２５ａ）を有している。第１リブ及び第２リブは、いずれも円形状の断面形状を有している。この構成によれば、第２領域３２の線状リブ２２ａにおける上流側端面及び下流側端面の曲率をそれぞれ一定にすることができる。したがって、第２領域３２において線状リブ２２ａの傾斜に沿わない向きで空気が流入したとしても、線状リブ２２ａの下流側での流れの乱れを小さくすることができる。 As described above, in the blower according to the present embodiment, the ribs 22 (for example, the linear ribs 22a) in the second region 32 are arranged so as to overlap each other when viewed in parallel with the rotation axis O. 1 rib (for example, 1st linear rib 24a) and 2nd rib (for example, 2nd linear rib 25a) are provided. Each of the first rib and the second rib has a circular cross-sectional shape. According to this configuration, the curvatures of the upstream end surface and the downstream end surface of the linear rib 22a in the second region 32 can be made constant. Therefore, even if air flows in the second region 32 in a direction that does not follow the inclination of the linear rib 22a, the turbulence of the flow on the downstream side of the linear rib 22a can be reduced.
　また、本実施の形態に係る送風装置において、第１リブ及び第２リブは、隙間２７を介して離れている。この構成によれば、第１線状リブ２４ａ及び第２線状リブ２５ａに衝突した空気の一部が隙間２７を通過するため、線状リブ２２ａの下流側での流れの乱れをさらに小さくすることができる。 Moreover, in the air blower according to the present embodiment, the first rib and the second rib are separated via the gap 27. According to this configuration, part of the air that has collided with the first linear ribs 24a and the second linear ribs 25a passes through the gap 27, so that the turbulence of the flow on the downstream side of the linear ribs 22a is further reduced. be able to.
　これまでの例では、１つの線状リブ２２ａを構成する第１線状リブ２４ａ及び第２線状リブ２５ａは、回転軸Ｏと平行に見たとき互いに重なって配置されているが、これに限られない。１つの線状リブ２２ａは、回転軸Ｏと平行に見たとき互いに重ならないように配置された第１線状リブ２４ａ及び第２線状リブ２５ａによって構成されていてもよい。 In the examples so far, the first linear rib 24a and the second linear rib 25a constituting one linear rib 22a are arranged so as to overlap each other when viewed in parallel with the rotation axis O. Not limited. One linear rib 22a may be configured by a first linear rib 24a and a second linear rib 25a that are arranged so as not to overlap each other when viewed in parallel with the rotation axis O.
　図１９は、本実施の形態に係る送風装置において、互いに重ならないように配置された第１線状リブ及び第２線状リブを有する線状リブの例を示す図である。図１９に示すように、第１線状リブ２４ｂ１、２４ｂ２と第２線状リブ２５ｂ１、２５ｂ２とを回転軸Ｏに垂直な平面に投影したとき、第１線状リブ２４ｂ１は、第２線状リブ２５ｂ１及び第２線状リブ２５ｂ２の双方と隙間を介して隣り合っている。第１線状リブ２４ｂ１と第２線状リブ２５ｂ１との間隔Ｓ１は、第１線状リブ２４ｂ１と第２線状リブ２５ｂ２との間隔Ｓ２よりも短い。この場合、１つの線状リブ２２ｂ１は、第１線状リブ２４ｂ１及び第２線状リブ２５ｂ１によって構成される。すなわち、第１線状リブ２４ｂ１の風上側の端点と、第２線状リブ２５ｂ１の風下側の端点と、の間の回転軸Ｏと平行な方向における距離が線状リブ２２ｂ１の高さＬｄとなる。また、第１線状リブ２４ｂ１の中心と第２線状リブ２５ｂ１の中心とを結ぶ直線と、回転軸Ｏ又は回転軸Ｏと平行な直線と、のなす角度が線状リブ２２ｂ１の傾斜角θとなる。 FIG. 19 is a diagram illustrating an example of a linear rib having a first linear rib and a second linear rib arranged so as not to overlap each other in the blower according to the present embodiment. As shown in FIG. 19, when the first linear ribs 24b1 and 24b2 and the second linear ribs 25b1 and 25b2 are projected onto a plane perpendicular to the rotation axis O, the first linear ribs 24b1 It is adjacent to both the rib 25b1 and the second linear rib 25b2 via a gap. The interval S1 between the first linear rib 24b1 and the second linear rib 25b1 is shorter than the interval S2 between the first linear rib 24b1 and the second linear rib 25b2. In this case, one linear rib 22b1 is constituted by the first linear rib 24b1 and the second linear rib 25b1. That is, the distance in the direction parallel to the rotation axis O between the end point on the leeward side of the first linear rib 24b1 and the end point on the leeward side of the second linear rib 25b1 is the height Ld of the linear rib 22b1. Become. The angle formed by the straight line connecting the center of the first linear rib 24b1 and the center of the second linear rib 25b1 and the straight line parallel to the rotational axis O or the rotational axis O is the inclination angle θ of the linear rib 22b1. It becomes.
実施の形態４．
　本発明の実施の形態４に係る送風装置について説明する。図２０は、本実施の形態に係る送風装置を回転軸Ｏを含む平面で切断した構成を模式的に示す図である。図２１は、本実施の形態に係る送風装置のプロペラファン１０の構成を示す正面図である。本実施の形態は、プロペラファン１０の形状において実施の形態１～３と異なっている。なお、実施の形態１～３と同一の機能及び作用を有する構成要素については、同一の符号を付してその説明を省略する。 Embodiment 4 FIG.
A blower according to Embodiment 4 of the present invention will be described. FIG. 20 is a diagram schematically illustrating a configuration in which the blower according to the present embodiment is cut along a plane including the rotation axis O. FIG. 21 is a front view showing the configuration of the propeller fan 10 of the blower according to the present embodiment. This embodiment is different from the first to third embodiments in the shape of the propeller fan 10. Note that components having the same functions and operations as in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted.
　図２０及び図２１に示すように、本実施の形態のプロペラファン１０は、ボスを備えないか又はボスが縮小された、いわゆるボスレス型のプロペラファンである。プロペラファン１０は、複数の翼１４と、複数の翼１４のうち周方向で隣り合う２つの翼１４同士を接続する複数の接続部１５と、を有している。接続部１５は、例えば板状の形状を有している。接続部１５の外周側の縁部１５ａは、プロペラファン１０の回転方向で前方に位置する翼１４の後縁１４ｂと、同回転方向で後方に位置する翼１４の前縁１４ｃと、を接続している。このような構成を有するプロペラファン１０では、回転軸Ｏを中心とし縁部１５ａに内接する仮想円筒面Ｃ１よりも内周側の領域が、プロペラファン１０の軸部１６に該当する。 As shown in FIGS. 20 and 21, the propeller fan 10 of the present embodiment is a so-called bossless type propeller fan that does not include a boss or has a reduced boss. The propeller fan 10 includes a plurality of blades 14 and a plurality of connection portions 15 that connect two blades 14 adjacent in the circumferential direction among the plurality of blades 14. The connecting portion 15 has a plate shape, for example. An edge 15a on the outer peripheral side of the connection portion 15 connects the rear edge 14b of the blade 14 positioned forward in the rotation direction of the propeller fan 10 and the front edge 14c of the blade 14 positioned rearward in the rotation direction. ing. In the propeller fan 10 having such a configuration, a region on the inner peripheral side with respect to the virtual cylindrical surface C1 centering on the rotation axis O and inscribed in the edge portion 15a corresponds to the shaft portion 16 of the propeller fan 10.
　回転軸Ｏと平行に見たとき、ファンガード２０は、軸部１６に重なって配置された第１領域３１と、軸部１６よりも外周側であって翼１４の外周縁１４ａの回転軌跡よりも内周側に配置された第２領域３２と、を有している。第１領域３１でのリブ２２の高さが第２領域３２でのリブ２２の高さよりも低い点は、実施の形態１と同様である。本実施の形態によれば、実施の形態１と同様の効果が得られる。本実施の形態のプロペラファン１０は、実施の形態２又は３のファンガード２０と組み合わせることもできる。 When viewed in parallel with the rotation axis O, the fan guard 20 is based on the first region 31 disposed so as to overlap the shaft portion 16 and the rotation locus of the outer peripheral edge 14a of the blade 14 on the outer peripheral side of the shaft portion 16. And a second region 32 arranged on the inner peripheral side. The point that the height of the rib 22 in the first region 31 is lower than the height of the rib 22 in the second region 32 is the same as in the first embodiment. According to the present embodiment, the same effect as in the first embodiment can be obtained. Propeller fan 10 of the present embodiment can be combined with fan guard 20 of the second or third embodiment.
　１０　プロペラファン、１１　ファンモータ、１２　吹出口、１３　ボス、１４　翼、１４ａ　外周縁、１４ｂ　後縁、１４ｃ　前縁、１５　接続部、１５ａ　縁部、１６　軸部、２０　ファンガード、２１　開口、２２　リブ、２２ａ、２２ｂ１　線状リブ、２２ａ１、２２ａ２　端点、２２ａ３、２２ａ４　端辺、２２ａ５、２２ａ６　中心、２３　平板部、２４　第１リブ、２４ａ、２４ｂ１、２４ｂ２　第１線状リブ、２５　第２リブ、２５ａ、２５ｂ１、２５ｂ２　第２線状リブ、２６　コーティング膜、２７　隙間、３１　第１領域、３２　第２領域、１００　空気調和装置用室外機、１０１　筐体、Ｃ１　仮想円筒面、Ｏ　回転軸。 10 propeller fan, 11 fan motor, 12 outlet, 13 boss, 14 wings, 14a outer periphery, 14b rear edge, 14c front edge, 15 connection part, 15a edge part, 16 shaft part, 20 fan guard, 21 opening, 22 Rib, 22a, 22b1, linear rib, 22a1, 22a2 end point, 22a3, 22a4 end side, 22a5, 22a6 center, 23 flat plate portion, 24 first rib, 24a, 24b1, 24b2, first linear rib, 25 second rib, 25a, 25b1, 25b2, second linear rib, 26 coating film, 27 gap, 31 first region, 32 second region, 100 air conditioner outdoor unit, 101 housing, C1 virtual cylindrical surface, O rotating shaft.

Claims (7)

  1. 　回転軸上に設けられた軸部、及び前記軸部の周囲に設けられた翼を有するプロペラファンと、
    　前記プロペラファンの風下側に設けられ、空気を通過させる複数の開口を画定するリブを有するファンガードと、
    　を備え、
    　前記回転軸と平行に見たとき、前記ファンガードは、前記軸部と重なって配置された第１領域と、前記軸部よりも外周側であって前記翼の回転軌跡よりも内周側に配置された第２領域と、を有しており、
    　前記回転軸と平行な方向における前記リブの寸法を前記リブの高さと定義した場合、前記第１領域での前記リブの高さは、前記第２領域での前記リブの高さよりも低い送風装置。     A propeller fan having a shaft portion provided on the rotation shaft, and a blade provided around the shaft portion;
    A fan guard provided on the leeward side of the propeller fan and having ribs defining a plurality of openings through which air passes;
    With
    When viewed in parallel with the rotation shaft, the fan guard is disposed on the outer periphery side of the shaft portion and on the inner periphery side of the rotation trajectory of the blades. A second region disposed,
    When the dimension of the rib in the direction parallel to the rotation axis is defined as the height of the rib, the height of the rib in the first region is lower than the height of the rib in the second region. .
  2. 　前記第１領域での前記リブは、円形状の断面形状を有している請求項１に記載の送風装置。 The air blower according to claim 1, wherein the rib in the first region has a circular cross-sectional shape.
  3. 　前記第２領域での前記リブは、前記回転軸と平行に見たとき互いに重なって配置された第１リブ及び第２リブを有しており、
    　前記第１リブ及び前記第２リブは、いずれも円形状の断面形状を有している請求項１又は請求項２に記載の送風装置。     The rib in the second region has a first rib and a second rib arranged to overlap each other when viewed in parallel with the rotation axis,
    The blower according to claim 1 or 2, wherein each of the first rib and the second rib has a circular cross-sectional shape.
  4. 　前記第１リブ及び前記第２リブは、隙間を介して離れている請求項３に記載の送風装置。 The air blower according to claim 3, wherein the first rib and the second rib are separated via a gap.
  5. 　前記第２領域の全域での前記リブの高さは一定である請求項１～請求項４のいずれか一項に記載の送風装置。 The blower according to any one of claims 1 to 4, wherein a height of the rib is constant throughout the second region.
  6. 　前記回転軸と垂直であってかつ前記リブの延伸方向と垂直な方向における前記リブの寸法を前記リブの幅と定義した場合、前記第１領域での前記リブの幅は、当該リブの高さと同一又はそれより大きい請求項１～請求項５のいずれか一項に記載の送風装置。 When the dimension of the rib in the direction perpendicular to the rotation axis and perpendicular to the extending direction of the rib is defined as the width of the rib, the width of the rib in the first region is the height of the rib. The blower device according to any one of claims 1 to 5, which is the same or larger.
  7. 　請求項１～請求項６のいずれか一項に記載の送風装置を備えた空気調和装置用室外機。 An outdoor unit for an air conditioner comprising the air blower according to any one of claims 1 to 6.
PCT/JP2018/017631 2018-05-07 2018-05-07 Blower device, and outdoor unit for air conditioner WO2019215783A1 (en)

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EP18918171.2A EP3792498A4 (en) 2018-05-07 2018-05-07 Blower device, and outdoor unit for air conditioner
PCT/JP2018/017631 WO2019215783A1 (en) 2018-05-07 2018-05-07 Blower device, and outdoor unit for air conditioner
JP2020517634A JP6929453B2 (en) 2018-05-07 2018-05-07 Outdoor unit for blower and air conditioner

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JPH0674196A (en) * 1992-08-26 1994-03-15 Hitachi Ltd Propeller fan and air conditioner therewith
JPH11223362A (en) * 1998-02-05 1999-08-17 Hitachi Ltd Air conditioner and outdoor unit used therein
JP4403691B2 (en) 2002-11-08 2010-01-27 ダイキン工業株式会社 Fan guard for blower unit
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JPH05296495A (en) * 1992-04-23 1993-11-09 Daikin Ind Ltd Outside machine for air conditioner
JPH0674196A (en) * 1992-08-26 1994-03-15 Hitachi Ltd Propeller fan and air conditioner therewith
JPH11223362A (en) * 1998-02-05 1999-08-17 Hitachi Ltd Air conditioner and outdoor unit used therein
JP4403691B2 (en) 2002-11-08 2010-01-27 ダイキン工業株式会社 Fan guard for blower unit
JP2013119816A (en) * 2011-12-08 2013-06-17 Samsung Yokohama Research Institute Co Ltd Propeller fan and outdoor unit of air conditioning apparatus

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