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WO2019215783A1 - Dispositif soufflant et unité d'extérieur pour climatiseur - Google Patents

Dispositif soufflant et unité d'extérieur pour climatiseur 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
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/017631
Other languages
English (en)
Japanese (ja)
Inventor
勝幸 山本
敬英 田所
拓矢 寺本
貴史 阿部
布施　敏也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2020517634A priority Critical patent/JP6929453B2/ja
Priority to EP18918171.2A priority patent/EP3792498A4/fr
Priority to PCT/JP2018/017631 priority patent/WO2019215783A1/fr
Publication of WO2019215783A1 publication Critical patent/WO2019215783A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—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.

Landscapes

  • 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)

Abstract

L'invention concerne un dispositif soufflant comprenant : un ventilateur hélicoïdal ayant une section d'arbre qui est disposée sur un axe de rotation, et ayant des pales qui sont disposées autour de la section d'arbre ; et un protège-ventilateur disposé sous le vent du ventilateur hélicoïdal et ayant des nervures qui définissent une pluralité d'ouvertures à travers lesquelles l'air peut s'écouler. Lorsqu'il est observé dans une direction parallèle à l'axe de rotation, le protège-ventilateur comprend une première région qui est disposée en chevauchement de la section d'arbre, et une deuxième région qui est située sur le côté périphérique extérieur par rapport à la section d'arbre et sur le côté périphérique intérieur par rapport au trajet de rotation des pales. Si la dimension des nervures dans la direction parallèle à l'axe de rotation est définie comme la hauteur des nervures, la hauteur des nervures dans la première région est inférieure à la hauteur des nervures dans la deuxième région.
PCT/JP2018/017631 2018-05-07 2018-05-07 Dispositif soufflant et unité d'extérieur pour climatiseur Ceased WO2019215783A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2020517634A JP6929453B2 (ja) 2018-05-07 2018-05-07 送風装置及び空気調和装置用室外機
EP18918171.2A EP3792498A4 (fr) 2018-05-07 2018-05-07 Dispositif soufflant et unité d'extérieur pour climatiseur
PCT/JP2018/017631 WO2019215783A1 (fr) 2018-05-07 2018-05-07 Dispositif soufflant et unité d'extérieur pour climatiseur

Applications Claiming Priority (1)

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PCT/JP2018/017631 WO2019215783A1 (fr) 2018-05-07 2018-05-07 Dispositif soufflant et unité d'extérieur pour climatiseur

Publications (1)

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WO2019215783A1 true WO2019215783A1 (fr) 2019-11-14

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2024106581A1 (fr) * 2022-11-16 2024-05-23 주식회사 더원리빙 Appareil d'aspiration à maille cylindrique à double séparation
KR20250008290A (ko) * 2023-07-07 2025-01-14 강대겸 송풍 조절 증속 노즐을 구비한 전면망
US12435736B1 (en) 2024-04-03 2025-10-07 Cisco Technology, Inc. Fan guard for fan

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JPH05296495A (ja) * 1992-04-23 1993-11-09 Daikin Ind Ltd 空気調和装置用室外機
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
JPH11223362A (ja) * 1998-02-05 1999-08-17 Hitachi Ltd 空気調和機及びそれに用いられる室外ユニット
JP4403691B2 (ja) 2002-11-08 2010-01-27 ダイキン工業株式会社 送風ユニットのファンガード
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JP5292113B2 (ja) * 2009-01-27 2013-09-18 パナソニック デバイスＳｕｎｘ株式会社 除電装置用ルーバ、及び、除電装置
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JPH05296495A (ja) * 1992-04-23 1993-11-09 Daikin Ind Ltd 空気調和装置用室外機
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
JPH11223362A (ja) * 1998-02-05 1999-08-17 Hitachi Ltd 空気調和機及びそれに用いられる室外ユニット
JP4403691B2 (ja) 2002-11-08 2010-01-27 ダイキン工業株式会社 送風ユニットのファンガード
JP2013119816A (ja) * 2011-12-08 2013-06-17 Samsung Yokohama Research Institute Co Ltd プロペラファン及び空気調和装置の室外機

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024106581A1 (fr) * 2022-11-16 2024-05-23 주식회사 더원리빙 Appareil d'aspiration à maille cylindrique à double séparation
KR20240071629A (ko) * 2022-11-16 2024-05-23 주식회사 더원리빙 이중 분리 원통 망을 가진 흡입장치
KR102850146B1 (ko) * 2022-11-16 2025-08-25 주식회사 더원리빙 이중 분리 원통 망을 가진 흡입장치
KR20250008290A (ko) * 2023-07-07 2025-01-14 강대겸 송풍 조절 증속 노즐을 구비한 전면망
KR102871558B1 (ko) 2023-07-07 2025-10-15 강대겸 송풍 조절 증속 노즐을 구비한 전면망
US12435736B1 (en) 2024-04-03 2025-10-07 Cisco Technology, Inc. Fan guard for fan

Also Published As

Publication number Publication date
JPWO2019215783A1 (ja) 2020-12-17
EP3792498A4 (fr) 2021-04-21
JP6929453B2 (ja) 2021-09-01
EP3792498A1 (fr) 2021-03-17

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