WO2016072068A1 - Dispositif de soufflante - Google Patents

Dispositif de soufflante Download PDF

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Publication number
WO2016072068A1
WO2016072068A1 PCT/JP2015/005438 JP2015005438W WO2016072068A1 WO 2016072068 A1 WO2016072068 A1 WO 2016072068A1 JP 2015005438 W JP2015005438 W JP 2015005438W WO 2016072068 A1 WO2016072068 A1 WO 2016072068A1
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WO
WIPO (PCT)
Prior art keywords
fan
blade
shielding
air
rotation direction
Prior art date
Application number
PCT/JP2015/005438
Other languages
English (en)
Japanese (ja)
Inventor
裕磨 山田
浩 茶木田
Original Assignee
株式会社デンソー
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
Priority claimed from JP2015041630A external-priority patent/JP6406068B2/ja
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to KR1020167031556A priority Critical patent/KR101900345B1/ko
Publication of WO2016072068A1 publication Critical patent/WO2016072068A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • 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

Definitions

  • the present disclosure relates to a blower device including a fan shroud disposed so as to surround an outside of an axial flow type fan.
  • Patent Document 1 describes a fan equipped with an axial flow type fan as a blower used for cooling an automobile radiator.
  • the distribution of the suction air volume on the outer periphery of the fan due to the shape of the entire fan shroud may be a cause of noise generation.
  • the narrow part extending from the specific edge part to the ring part between the adjacent corners on the outer peripheral edge of the fan shroud and the other part
  • the air volume of the flowing air from the wide area.
  • the amount of intake air at the outer periphery of the fan becomes non-uniform, which causes an imbalance in the air flow in the entire peripheral area of the fan and tends to generate fan rotation noise.
  • the present disclosure has been made in view of the above points, and an object thereof is to provide a blower having a fan shroud that can reduce a peak noise level related to rotational noise.
  • a blower device includes an axial flow type fan having a plurality of blades for blowing air, and a fan shroud that supports the fan.
  • the fan shroud has a ring portion that surrounds the outer periphery of the fan with a gap between the blade tips and a portion that connects the outer periphery of the fan shroud and the ring portion. And a wind guide portion for guiding to the wind.
  • the outer edge of the fan shroud is provided with a specific edge between the corners adjacent to each other at the outer edge so that the distance to the ring part is the shortest between the corners.
  • the ring portion at a position corresponding to the specific edge portion is provided downstream of the blown air from the blade and has a shielding portion extending from the ring portion so as to be positioned closer to the center of the fan than the outer periphery of the fan.
  • the amount of air flowing from the air guide portion toward the shielding portion can be suppressed by providing a shielding portion that shields the downstream of the blown air from the blade at the portion corresponding to the specific edge portion in the ring portion.
  • a shielding portion that shields the downstream of the blown air from the blade at the portion corresponding to the specific edge portion in the ring portion.
  • FIG. 1 It is a rear view which shows the air blower which concerns on 1st Embodiment of this indication. It is a rear view which shows the fan shroud of 1st Embodiment. It is a fragmentary sectional view for demonstrating the air flow in the large part in the wind guide part of a fan shroud. It is a fragmentary sectional view for demonstrating the air flow in the narrow part in the wind guide part of a fan shroud. It is the experimental result which measured the noise about the air blower of the comparative example 1.
  • FIG. It is the experimental result which measured the noise about the air blower of 1st Embodiment. It is an enlarged view for demonstrating the shape of the shielding part of 1st Embodiment.
  • a blower device 1 according to a first embodiment which is an embodiment of the present disclosure will be described with reference to FIGS. 1 to 8.
  • 1st Embodiment demonstrates the apparatus which provides ventilation with respect to the radiator mounted in order to cool an engine etc. in a vehicle as an example of an air blower.
  • the blower 1 includes a single axial flow type fan 3 and a fan shroud 2 that supports a motor 32 that rotationally drives the fan 3 and guides air sucked by the fan 3.
  • the fan 3 includes a boss portion serving as a center of rotation and a plurality of blades 30 extending radially from the boss portion. The plurality of blades 30 are configured such that one end thereof is integrated with the boss portion and the other end thereof is integrated with the circular ring portion 31.
  • the fan 3 includes a motor 32 that provides rotational power.
  • the motor 32 has a motor shaft that is a rotating shaft. The motor shaft and the boss portion are connected by a fixing member.
  • the motor 32 is an electric type, for example, a ferrite type DC motor.
  • a harness part for supplying electric power to the armature is connected to the motor 32, and this harness part is connected to a vehicle battery via a connector or the like.
  • the fan 3 is arranged on the downstream side of the intake air with respect to the radiator 4 which is an example of the heat exchanger. Accordingly, the fan 3 sucks outside air from the grill side on the front surface of the vehicle toward the engine side when the motor 32 is rotationally driven.
  • the fan shroud 2 is a member that supports the fan 3 that provides cooling air to the radiator 4 for radiating the heat of the cooling water of the engine.
  • the fan shroud 2 supports and fixes the motor 32 of the fan 3 and is integrally attached to the radiator 4.
  • the fan shroud 2 has a lower attachment portion and an upper attachment portion having through holes through which screws or the like can be inserted in the vertical lower portion and the vertical upper portion.
  • the fan shroud 2 is integrally attached to the radiator 4 by screwing each of the lower attachment portion and the upper attachment portion with each female screw portion provided in the radiator 4.
  • the radiator 4 is attached to a member on the vehicle side, for example, a frame via a packing 43 at each of an upper end, a lower end, a side end, and the like.
  • the fan shroud 2 has a rectangular shape, and has a configuration in which one fan 3 that allows cooling air to pass through a heat exchanging portion that performs heat exchange in the radiator 4 can be disposed.
  • the heat exchanging part of the radiator 4 includes, for example, a plurality of tubes through which the cooling water circulates, and outer fins provided integrally with the tubes between the tubes.
  • the cooling water from the engine flows through the tube of the heat exchanging unit 40 after flowing into the inlet side tank 41 of the radiator 4 from the inflow pipe 41a through the radiator circuit by driving the water pump. Then, the cooling water is cooled by exchanging heat with outside air provided by the fan 3, and then flows out from the outlet side tank 42 via the outflow pipe 42a and returns to the engine.
  • the fan shroud 2 includes a ring part 21 that surrounds the outer periphery of the fan 3 with a space between the fan 3 and the air guide part 23 that guides air sucked by the fan 3.
  • the air guide portion 23 is a portion connecting the outer peripheral edge 22 of the fan shroud 2 and the ring portion 21, and has a guide function for guiding the air sucked by the fan 3 to the inside of the ring portion 21.
  • the fan shroud 2 includes a motor mounting portion 25 to which the motor 32 of the fan 3 is mounted, and a plurality of stays 25 a extending radially from the motor mounting portion 25.
  • the ring portion 21 is a circular cylindrical portion that surrounds the outer periphery (the outer periphery of the fan) of a plurality of (for example, five) blades 30 of the fan 3, and is formed integrally with the radial end of the stay 25a.
  • the motor mounting portion is supported via
  • the fan shroud 2 includes a wind guide portion 23 that is a portion that connects between the outer peripheral edge 22 and the ring portion 21 and has a shape that is smoothly inclined or curved.
  • the air guide portion 23 functions to efficiently suck outside air into the entire surface of the heat exchange portion of the radiator 4.
  • a portion formed by the air guide portion 23 extending from the end located on the radiator 4 side at the outer peripheral edge 22 of the fan shroud 2 to the inner peripheral edge of the ring portion 21 constitutes a wind tunnel portion, and an efficient intake airflow of the outside air is formed. Contributes to formation.
  • the fan shroud 2 is, for example, a resin molded member, and is molded by injection molding using a predetermined mold. This resin molded member is made of, for example, polypropylene resin whose strength is increased by glass fiber or talc material.
  • the fan shroud 2 has a rectangular outer peripheral edge 22.
  • the outer peripheral edge 22 is provided with four corners 22a, 22b, 22c, and 22d. Between the adjacent corners, a specific edge having the shortest distance to the ring part 21 between the corners is formed.
  • the specific edge portion 22ab is a part of the outer peripheral edge 22 having the shortest distance to the ring portion 21 between the adjacent corner portions 22a and 22b.
  • the specific edge portion 22bc is a part of the outer peripheral edge 22 having the shortest distance to the ring portion 21 between the adjacent corner portions 22b.
  • the specific edge portion 22cd is a part of the outer peripheral edge 22 having the shortest distance to the ring portion 21 between the adjacent corner portions 22c and 22d.
  • the specific edge portion 22ad is a part of the outer peripheral edge 22 having the shortest distance to the ring portion 21 between the adjacent corner portions 22a and 22d.
  • corner portion 22a and the corner portion 22b are portions having the longest distance to the ring portion 21 and longer than the specific edge portion 22ab in a part of the outer peripheral edge 22 connecting the corner portion 22a and the corner portion 22b. Therefore, a part of the air guide portion 23 that connects the specific edge portion 22ab and the ring portion 21 has a narrowness that is one of the first regions having the smallest surface area between the adjacent corner portions 22a and 22b. A portion 23ab is formed. In the portion of the air guide portion 23 that connects the corner portion 22a and the ring portion 21, a wide portion 23a that is one of the second regions having a large surface area with respect to the narrow portion 23ab is formed.
  • a wide portion 23b that is one of the second regions having a large surface area with respect to the narrow portion 23ab is formed.
  • the wide portion 23a and the narrow portion 23ab are integrally formed by connecting the surfaces on the upstream side of the air flow with a smooth surface shape.
  • the narrow portion 23ab and the wide portion 23b are integrally formed by connecting the surfaces on the upstream side of the air flow with a smooth surface shape.
  • corner portion 22b and the corner portion 22c are portions having the longest distance to the ring portion 21 and longer than the specific edge portion 22bc in a part of the outer peripheral edge 22 connecting the corner portion 22b and the corner portion 22c. Therefore, a part of the air guide portion 23 that connects the specific edge portion 22bc and the ring portion 21 is a narrow portion that is one of the first regions having the smallest surface area between the adjacent corner portions 22b and 22c. A portion 23bc is formed. In the portion of the air guide portion 23 that connects the corner portion 22c and the ring portion 21, a wide portion 23c that is one of the second regions having a large surface area with respect to the narrow portion 23bc is formed.
  • the wide portion 23b and the narrow portion 23bc are integrally formed by connecting the surfaces on the upstream side of the air flow with a smooth surface shape.
  • the narrow portion 23bc and the wide portion 23c are integrally formed by connecting the surfaces on the upstream side of the air flow with a smooth surface shape.
  • the specific edge portion 22bc has a shape along the inner peripheral surface shape of the ring portion 21, and is in a position protruding in the lateral direction from the corner portion 22b or the corner portion 22c.
  • the narrow portion 23bc has a smooth surface shape extending along the inner peripheral surface shape of the ring portion 21 with the same width toward the corner portion 22b and the corner portion 22c.
  • corner portion 22c and the corner portion 22d are portions having the longest distance to the ring portion 21 and longer than the specific edge portion 22cd in a part of the outer peripheral edge 22 connecting the corner portion 22c and the corner portion 22d. Therefore, a part of the air guide portion 23 that connects the specific edge portion 22cd and the ring portion 21 has a narrowness that is one of the first regions having the smallest surface area between the adjacent corner portions 22c and 22d. A portion 23cd is formed. In the portion of the air guide portion 23 that connects the corner portion 22d and the ring portion 21, a wide portion 23d that is one of the second regions having a large surface area with respect to the narrow portion 23cd is formed.
  • the wide portion 23c and the narrow portion 23cd are integrally formed by connecting the surfaces on the upstream side of the air flow with a smooth surface shape.
  • the narrow portion 23cd and the wide portion 23d are integrally formed by connecting the surfaces on the upstream side of the air flow with a smooth surface shape.
  • corner portion 22a and the corner portion 22d are portions having the longest distance to the ring portion 21 and longer than the specific edge portion 22ad in a part of the outer peripheral edge 22 connecting the corner portion 22a and the corner portion 22d. Therefore, a part of the air guide portion 23 that connects the specific edge portion 22ad and the ring portion 21 has a narrowness that is one of the first regions having the smallest surface area between the adjacent corner portions 22a and 22d.
  • a portion 23ad is formed.
  • the large portion 23a and the large portion 23d are one of the second regions having a large surface area with respect to the narrow portion 23ad.
  • the wide portion 23a and the narrow portion 23ad are integrally formed with a surface on the upstream side of the air flow connected by a smooth surface shape.
  • the narrow portion 23ad and the wide portion 23d are integrally formed by connecting the surfaces on the upstream side of the air flow with a smooth surface shape.
  • the specific edge portion 22ad is a shape along the inner peripheral surface shape of the ring portion 21, and is in a position protruding in the lateral direction from the corner portion 22a and the corner portion 22d.
  • the narrow portion 23ad has a smooth surface shape extending with the same width toward the corner portion 22a and the corner portion 22d so as to follow the inner peripheral surface shape of the ring portion 21.
  • the fan shroud 2 is provided downstream of the blade 30 in the ring portion 21 at a position corresponding to the specific edge, and is located closer to the center of the fan 3 than the outer periphery of the fan 3 from the ring portion 21. And a shielding portion 24 extending in the direction.
  • the shielding part 24 can be provided in any part corresponding to any of the specific edge 22ab, the specific edge 22bc, the specific edge 22cd, and the specific edge 22ad. Therefore, the shielding part 24 is provided in a part corresponding to at least one of the specific edge 22ab, the specific edge 22bc, the specific edge 22cd, and the specific edge 22ad.
  • the shielding part 24 is a plate-like part protruding from the downstream end part of the ring part 21 toward the center of the fan 3.
  • the shielding part 24 protrudes from the ring part 21 to a position overlapping the outer periphery of the fan 3. Therefore, the air flowing out from the vicinity of the outer periphery of the fan 3, in other words, the air flowing out along the inner peripheral edge of the ring portion 21 collides with the shielding portion 24.
  • the shielding part 24 has a predetermined dimension length also in the circumferential direction.
  • the air that has passed through the heat exchanging portion 40 of the radiator 4 flows along the narrow portion 23 ad and the like in the air guide portion 23 inside the specific edge portion 22 ad and the like.
  • the air flowing along the narrow portion 23ad and the like flows into the inside of the ring portion 21 in a direction along the inner peripheral edge of the ring portion 21, and the flow is blocked by the shielding portion 24 at the downstream end portion of the ring portion 21. That is, the air sucked into the inside of the ring portion 21 from the narrow portion 23ad or the like is blocked by the shielding portion 24, so that it is difficult to flow.
  • the amount of intake air at the outer periphery of the fan 3 becomes non-uniform in a state where a smooth flow is formed all around the ring portion 21.
  • the amount of air sucked into the inside of the ring portion 21 along the narrow portion 23ad and the like is larger than the air sucked into the inside of the ring portion 21 along the wide portion 23a and the like excluding the narrow portion 23ad and the like.
  • the air sucked into the inside of the ring portion 21 via the narrow portion 23ad or the like is not very stalled because the degree of collision is small in the first area (the narrow portion 23ad or the like) having a small area. is there.
  • FIG. 5 shows the experimental results of the inventors measuring the noise level for the blower of the comparative example.
  • FIG. 6 shows experimental results in which the inventors measured the noise level for the blower device 1 of the first embodiment having the shielding part 24.
  • the air blower according to the comparative example is a conventional device including a fan shroud that does not have an air volume adjustment function like the shielding portion 24.
  • the other experimental conditions are as follows: For each blower, with the radiator attached integrally, the same voltage is applied to the motor, the air flow is 1 m downstream from the position of the outer periphery of the fan shroud, and the same height as the center of the fan. The noise was measured with a microphone installed. The sound pressure levels shown in FIGS. 5 and 6 are measured using A characteristic frequency weighting.
  • the shielding portion 24 has a position in which the end 24 b (front edge) in the rotation direction R is closer to the center side of the fan 3 than the opposite end 24 a (rear edge). It is formed in a shape that extends. That is, the shielding portion 24 is configured such that the end portion 24b in the rotation direction has a larger width dimension protruding from the ring portion 21 than the opposite end portion 24a. With this configuration, at a position where the blade 30 has advanced in the rotation direction R, the blade 30 and the shielding portion 24 overlap with each other with a large area.
  • the shielding part 24 may be formed so that the surface area becomes larger as it proceeds in the rotation direction R of the fan 3. With this configuration, the blade 30 overlaps the shielding portion 24 with a larger area as it advances in the rotation direction R. As shown in FIG. 7, when the blade 30 indicated by a solid line is in a position overlapping the end portion 24 a (rear edge portion) positioned in the reverse rotation direction of the shielding portion 24, the front edge portion 30 a in the rotation direction of the blade 30. And overlap in a small area.
  • the blade 30 indicated by a two-dot chain line advanced in the rotation direction R from the position indicated by the solid line is located at a position overlapping the end 24b (front edge) located in the rotation direction R of the shielding portion 24, and more than the blade 30 indicated by the solid line. Also overlaps the shielding part 24 in a large area.
  • the front edge portion 30a is an end portion of each blade 30 that is positioned in the rotational direction R, and is a portion that extends from a base end near the fan center of the blade 30 to an outer end 30at that is farthest from the fan center.
  • the rear edge of the blade 30 positioned immediately before the rotation direction R is reached.
  • the edge portion 30 b does not overlap the shielding portion 24.
  • the circumferential direction length of the shielding part 24 is set to such a length. That is, while the rear edge portion 30b of the blade 30 positioned immediately before the rotation direction R overlaps the shielding portion 24, the front edge portion 30a of the blade 30 is aligned with the end portion 24a (rear edge) of the shielding portion 24.
  • the circumferential length of the shielding portion 24 is set so as not to overlap the portion.
  • the blower 1 includes an axial flow type fan 3 having a plurality of blades 30, and a fan shroud 2 that supports the fan 3.
  • the fan shroud 2 connects the ring portion 21 that surrounds the outer periphery of the fan 3 with a gap between the tip of the blade 30 and the outer peripheral edge 22 of the fan shroud 2 and the ring portion 21.
  • an air guide portion 23 that guides the inside of the ring portion 21.
  • the outer peripheral edge 22 of the fan shroud 2 is provided with a specific edge between adjacent corners on the outer peripheral edge 22 that has the shortest distance to the ring part 21 between the corners.
  • the fan shroud 2 is provided downstream of the blade 30 in the ring portion 21 at a position corresponding to the specific edge, and is located closer to the center of the fan 3 than the outer periphery of the fan 3 from the ring portion 21. And a shielding portion 24 extending in the direction.
  • the amount of air flowing from the air guide portion 23 toward the shielding portion 24 is suppressed by providing the shielding portion 24 that blocks the downstream of the blown air from the blade 30 at the portion corresponding to the specific edge portion. be able to.
  • the shielding part 24 By suppressing the amount of air provided by the shielding part 24, it is possible to improve the non-uniform state of the intake air volume around the fan and further improve the circumferential balance of the intake air. Further, pressure fluctuations in the entire circumference around the fan 3 can be suppressed. Therefore, the blower 1 that reduces the peak noise level related to the rotational noise of the fan 3 can be obtained.
  • the shielding part 24 is formed in a shape in which the surface area increases as it proceeds in the rotation direction R of the fan 3.
  • the shielding part 24 protrudes toward the center side of the fan 3 so that the surface area gradually increases as the fan 3 moves in the rotation direction R. According to this, as each blade 30 advances in the rotation direction R, the area overlapping with the shielding part 24 can be gradually increased. As a result, the air volume of the air that collides with the shield 24 and stalls with the rotation of the fan 3 can be gradually changed, so that it is possible to prevent sudden air volume suppression.
  • the blade 30 When the leading edge portion 30a of the blade 30 in the rotational direction R overlaps with the end portion 24a (rear edge portion) located on the opposite side of the rotational direction R of the shielding portion 24, the blade 30 is preceded by the rotational direction R.
  • the rear edge portion 30 b on the opposite side of the rotation direction R does not overlap the shielding portion 24.
  • the circumferential length of the shielding part 24 is set to such a length.
  • one blade 30 can be configured to overlap with one shielding portion 24. For this reason, it is possible to always maintain a constant change in the area in which one shielding portion 24 and the blade 30 overlap each other as the fan 3 rotates. As a result, the entire fan can be adjusted with the degree of overlap with the shielding portion 24 being constant.
  • the specific edge corresponding to the position where the shielding part 24 is provided is the part having the shortest distance to the ring part 21 in the outer peripheral edge 22 of the fan shroud 2. According to this, the amount of air sucked into the position can be effectively reduced by providing the shielding part 24 at the position corresponding to the specific edge that can cause the most rotational noise. For this reason, even if the number of shielding portions 24 formed on the fan shroud 2 is reduced or the size thereof is reduced, it is possible to effectively reduce the rotational noise. In addition, since the number and size of the shielding portions 24 can be suppressed as long as the rotational noise can be reduced, the ventilation resistance on the downstream side of the fan 3 can be suppressed.
  • the shielding part 240 illustrated in FIG. 9 is another form with respect to the shielding part 24 of the first embodiment, and is also an embodiment of the present disclosure.
  • the shield part 240 is provided downstream of the blade 300 in the ring part 210 at a position corresponding to the specific edge part, and extends from the ring part 210 so as to be positioned closer to the center of the fan than the outer periphery of the fan. Shape.
  • the shielding part 240 is set so that the protrusion height with respect to the ring part 210 is substantially the same in the entire rotation direction R.
  • the ring part 210 may be the same as the ring part 21 in the first embodiment.
  • the blade 300 is formed in a shape in which the front edge portion 300a in the rotation direction R is not displaced in the rotation direction R between the center side and the outer peripheral side of the fan.
  • the base end at a position close to the center of the fan and the outer end at a position farthest from the center are in a relationship in which neither of the leading ends 300a precedes the rotation direction R.
  • the blade 300 moves to the rear edge 240 a of the shielding part 240 with the length of the protruding height of the shielding part 240 as the fan rotates. Start to overlap. That is, when the blade 300 begins to overlap the shielding portion 240, a vortex is generated in the front edge portion 300a of the blade 300 over the length dimension as illustrated in FIG. Further, when the blade 300 is displaced in the rotation direction R, for example, the blade 300 is displaced to a position indicated by a broken line in FIG. 9, and further moved in the rotation direction to be displaced to a position indicated by a two-dot chain line in FIG.
  • the blade 300 continues to overlap the shielding part 240 with the length dimension of the protruding height of the shielding part 240. Furthermore, while the blade 300 and the shielding part 240 overlap, the location where the front edge part 300a of the blade 300 overlaps the tip of the shielding part 240 is at the same position with respect to the blade. That is, while the blade 300 and the shielding part 240 overlap, the location where the vortex is generated in the front edge part 300a of the blade 300 does not change.
  • the part where the front edge part 300a of the blade 300 overlaps the tip of the shielding part 240 may be the same position in the radial direction.
  • the 10 is another form of the shield 240.
  • the shielding part 24 is formed so that the tip thereof becomes closer to the center of the fan 3 as it advances in the rotation direction R. Therefore, the shielding part 24 has a shape that gradually increases as the protruding height dimension from the ring part 21 advances in the rotation direction R.
  • the blade 30 is formed in a shape in which the front edge portion 30a in the rotation direction R protrudes in the rotation direction R on the outer peripheral side of the fan.
  • the front edge portion 30 a has a shape in which the outer end 30 at farthest from the center precedes the rotation direction R with respect to the base end near the center of the fan 3. Therefore, the front edge 30a in the rotation direction R of the blade 30 is configured such that the outer end 30at is the most advanced position in the rotation direction R of the front edge 30a.
  • the blade 30 starts to overlap the shielding part 24 from the outer end 30 at as the fan 3 rotates. That is, when the overlap starts, a vortex is generated at the outer end 30at of the front edge 30a. That is, at the beginning of the overlap, a vortex accompanying the overlap with the shielding portion 24 is generated only at the outer end 30 at of the blade 30 farthest from the center of the fan 3.
  • the blade 30 when the blade 30 is displaced in the rotation direction R, for example, the blade 30 is displaced to a position indicated by a broken line in FIG. 10, and further moved in the rotation direction to a position indicated by a two-dot chain line in FIG. Since the tip of the shielding part 24 is formed so as to be closer to the center of the fan 3 as it proceeds in the rotation direction R, the blade 30 indicated by a broken line is closer to the center of the fan 3 at the front edge part 30a than at the start of overlapping. It overlaps the tip of the shield 240 at the position.
  • the blade 30 indicated by the two-dot chain line overlaps the tip of the shielding portion 24 at a position closer to the center of the fan 3 than the blade 30 indicated by the broken line at the front edge portion 30a.
  • the portion where the front edge portion 30 a of the blade 30 overlaps the tip of the shielding portion 24 gradually moves toward the center of the fan 3. That is, while the blade 30 and the shielding portion 24 overlap each other, the portion where the vortex is generated in the front edge portion 30 a of the blade 30 moves toward the center of the fan 3.
  • the point where the vortex is generated in the blade 30 is shifted with the rotational displacement or with the passage of time. For this reason, since generation
  • the blower shown in FIG. 10 since the effect of suppressing the air amount brought about by the above-described shielding part 24 and the effect of the vortex dispersion act synergistically, the peak noise level related to the rotational noise of the fan 3 can be reduced.
  • the blower device 1 that can be further reduced can be provided.
  • the blade tip angle A and the shielding portion angle B can further improve the effect of noise suppression when the relationship expressed by the following formula (1) is established.
  • the blade tip is an important parameter for determining the crossing angle between the leading edge 30a and the shielding part 24 tip.
  • An angle A and a shielding part angle B are defined.
  • the blade tip angle A constitutes the angle of the front edge portion 30a extending from the outer end 30at of the blade 30. Specifically, a tangent t1 is drawn at a point of the front edge portion 30a that is displaced from the outer end 30at by a predetermined circumferential length C in the direction opposite to the rotation direction R. Further, a tangent t2 is drawn at a point on the outer periphery of the blade 30 that is displaced from the outer end 30at by a predetermined circumferential length C in the direction opposite to the rotation direction R.
  • the circumferential length C is an assumed numerical value that can be determined in advance in order to define the tip angle of the blade 30 in the vicinity of the outer end 30at.
  • An angle A shown in FIG. 11 formed by the tangent t1 and the tangent t2 can be defined as the blade tip angle.
  • the shielding part angle B constitutes an angle formed by the tip of the shielding part 24 extending from the end part 24a which is the rear edge part of the shielding part 24. Specifically, a tangent t3 is drawn at a point where the tip end of the shielding portion 24 is displaced from the end portion 24a (rear edge portion) located on the opposite side of the rotation direction R by the circumferential length C in the rotation direction R. . Further, a tangent t4 is drawn with respect to a point on the base end 24c of the shielding portion 24 displaced from the rear edge portion in the rotation direction R by a predetermined circumferential length C. An angle B shown in FIG. 11 formed by the tangent t3 and the tangent t4 can be defined as the shielding portion angle.
  • the shielding portion angle B may be set to be smaller than a value obtained by doubling the blade tip angle A. That is, the following formula (1) is established.
  • the tip shape of the blade 30 and the protruding shape of the shielding portion 24 are nearly symmetrical with the rotation of the fan 3.
  • the blade 30 and the shield 24 can be crossed so that According to this, it is possible to contribute to gradually reducing the wind speed when the blade 30 passes through the shielding part 24, so that it is possible to provide the air blower 1 that is desirable for reducing the peak noise level related to the rotational noise of the fan 3.
  • the formula (1) may be replaced with the formula (2) in which the shielding portion angle B and the blade tip angle A are equal. According to this configuration, it is possible to provide the optimum blower device 1 for reducing the peak noise level related to the rotational noise of the fan 3.
  • A B Equation (2) This is because the tip of the blade 30 and the rear edge of the shielding portion 24 are symmetrical with respect to the alternate long and short dash line in the state immediately before the blade 30 overlaps the shielding portion 24 as shown in FIG. is there.
  • the shielding parts 24 in the blower device 1 of the above-described embodiment are not limited to the number and installation position described in the embodiment.
  • the blower device 1 of the above-described embodiment is a device that provides cooling air to the radiator 4 for cooling the engine coolant of the vehicle, but the present disclosure is not limited to this embodiment. Absent.
  • the present invention can be applied to a device that is mounted on an outdoor unit such as an air conditioner or a hot water supply device to provide cooling air, a computer, a device that provides cooling air to cool electronic components, or the like.
  • the air blower 1 of above-mentioned embodiment is arrange
  • the air blower 1 may be arranged so as to supply air blown out to a heat exchanger or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention porte sur un dispositif de soufflante qui est pourvu d'un ventilateur à écoulement axial (3) qui possède de multiples pales (30, 300) pour souffler de l'air et un déflecteur de ventilateur (2) qui porte le ventilateur. Le déflecteur de ventilateur présente une section annulaire (21, 210), qui entoure la périphérie externe du ventilateur par un espacement à partir de la pointe des pales, et une section de guidage d'air (23), qui relie le bord périphérique externe (22) du déflecteur de ventilateur à la section annulaire, et qui guide l'air aspiré vers l'intérieur par le ventilateur jusqu'au côté interne de la section annulaire. Entre les sections jointives de coin (22a) et de coin (22b) du bord périphérique externe (22) se trouve une section de bord particulière (22b), qui est la partie ayant la plus courte distance jusqu'à la section annulaire parmi les parties entre les sections de coin, et une section de protection (24, 240) est disposée sur le côté aval de la section annulaire de l'air soufflé par rapport aux pales à un emplacement correspondant à la section de bord particulière, et s'étend à partir de la section annulaire de façon à être positionnée plus près du centre des ventilateurs que de la périphérie externe de ceux-ci.
PCT/JP2015/005438 2014-11-03 2015-10-29 Dispositif de soufflante WO2016072068A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020167031556A KR101900345B1 (ko) 2014-11-03 2015-10-29 송풍 장치

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2014-223868 2014-11-03
JP2014223868 2014-11-03
JP2015-041630 2015-03-03
JP2015041630A JP6406068B2 (ja) 2014-11-03 2015-03-03 送風装置

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WO2016072068A1 true WO2016072068A1 (fr) 2016-05-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017017264A1 (fr) * 2015-07-29 2017-02-02 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Roue de ventilateur et module ventilateur de refroidissement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1144432A (ja) * 1997-07-24 1999-02-16 Hitachi Ltd 空気調和機
JP2003343494A (ja) * 2002-05-27 2003-12-03 Mitsubishi Heavy Ind Ltd 冷却ファン
JP2012107538A (ja) * 2010-11-16 2012-06-07 Panasonic Corp 軸流ファンまたは斜流ファンおよびこれを有する室外ユニットを搭載した空気調和機
JP2013142374A (ja) * 2012-01-12 2013-07-22 Denso Corp 送風装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1144432A (ja) * 1997-07-24 1999-02-16 Hitachi Ltd 空気調和機
JP2003343494A (ja) * 2002-05-27 2003-12-03 Mitsubishi Heavy Ind Ltd 冷却ファン
JP2012107538A (ja) * 2010-11-16 2012-06-07 Panasonic Corp 軸流ファンまたは斜流ファンおよびこれを有する室外ユニットを搭載した空気調和機
JP2013142374A (ja) * 2012-01-12 2013-07-22 Denso Corp 送風装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017017264A1 (fr) * 2015-07-29 2017-02-02 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Roue de ventilateur et module ventilateur de refroidissement
US10563664B2 (en) 2015-07-29 2020-02-18 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Fan impeller and radiator fan module

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