WO2011113184A1 - 降低换气扇噪音的结构 - Google Patents

降低换气扇噪音的结构 Download PDF

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Publication number
WO2011113184A1
WO2011113184A1 PCT/CN2010/001028 CN2010001028W WO2011113184A1 WO 2011113184 A1 WO2011113184 A1 WO 2011113184A1 CN 2010001028 W CN2010001028 W CN 2010001028W WO 2011113184 A1 WO2011113184 A1 WO 2011113184A1
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WO
WIPO (PCT)
Prior art keywords
panel
noise
opening
snail shell
ventilating fan
Prior art date
Application number
PCT/CN2010/001028
Other languages
English (en)
French (fr)
Inventor
饶泽伟
杨振坚
李小明
Original Assignee
广东松下环境系统有限公司
松下电器产业株式会社
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Application filed by 广东松下环境系统有限公司, 松下电器产业株式会社 filed Critical 广东松下环境系统有限公司
Priority to US13/634,022 priority Critical patent/US9441642B2/en
Publication of WO2011113184A1 publication Critical patent/WO2011113184A1/zh

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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
    • F04D29/66—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
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/663—Sound attenuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Definitions

  • the present invention relates to a noise reduction structure, and more particularly to a structure for reducing the noise of a ventilating fan. Background technique
  • a known ventilating fan 10 which is generally sized to reduce the noise of the ventilating fan 10 by an apertured panel 12 disposed below the ventilating snail shell 11, which includes the same size as the opening 14 of the ventilating fan frame 13 And the opening 14 of the ventilating fan frame 13 is covered and fixed to the snail shell 11 by screws.
  • the noise reduction structure of the ventilating fan of the above-mentioned known technique has the following problems: 1. Since the area of the apertured panel 12 is large, the space formed between the snail shell 11 and the snail shell 11 is large, and the noise that is inhaled is generated in the space. The problem of noise caused by turbulent flow; 2. Due to the large area of the apertured panel 12, the required materials are large, and there is a problem of high cost; 3. Due to the large area of the apertured panel 12, when assembling and dismantling, Multiple screws are required, which wastes man-hours and poor construction.
  • the noise value of the ventilating fan of the noise reduction structure is reduced to a value of 23 to 14 dB when using the above-mentioned known technique.
  • a primary object of the present invention is to provide a structure for reducing noise of a ventilating fan which can better reduce noise.
  • a secondary object of the present invention is to provide a structure that reduces the noise of the ventilating fan with a simple structure and convenient assembly and disassembly.
  • the structure for reducing the noise of the ventilating fan provided by the present invention is an apertured panel fixed on the snail shell, and the apertured panel is formed into a ring-shaped semi-enclosed hollow structure in combination with the shape of the snail shell air inlet.
  • the hole panel is only covered at the suction opening of the snail shell.
  • the apertured panel has a J-shaped hollow structure, forming a low side and a high side, and a gap is provided between the front end of the low side and the air inlet.
  • the inside of the hollow structure of the opening panel is provided with a plurality of ribs.
  • the inside of the hollow structure of the opening panel is provided with a plurality of concave and convex structures.
  • a first protrusion and a second protrusion are disposed on an outer side of the apertured panel, and an opening is disposed on the second protrusion; and a buckle and a corresponding position for engaging the first protrusion are disposed on the snail shell Mounting holes for the boring holes on the two bumps.
  • the outer diameter of the pupil panel is equal to the outer diameter of the snail shell air inlet.
  • Figure 1 is a schematic view showing the structure of a known technique
  • Figure 3 is a general schematic view of the structure of the present invention.
  • Figure 4 is a schematic view of the apertured panel of the present invention.
  • Figure 5 is a schematic view showing the relationship between the diameter of the snail shell and the perforated panel of the present invention.
  • FIG. 6A is a schematic view showing a first embodiment of the apertured panel of the present invention.
  • 6B is a schematic view showing a second embodiment of the pupil panel of the present invention.
  • Figure 7 is a noise test diagram of the present invention. detailed description
  • the ventilating fan 100 includes a frame 130 in which a snail shell 110 equipped with a fan is mounted.
  • An apertured panel 120 is fixed on the snail shell 110.
  • the apertured panel 120 is formed into a ring-shaped semi-enclosed hollow structure in combination with the shape of the air inlet 140 of the snail shell 110.
  • the apertured panel 120 covers only the suction of the snail shell 110.
  • the so-called pupil panel 120 covers only the suction opening 140 of the snail shell 110, meaning that the entire frame is not covered like the prior art.
  • FIG. 4 it is a schematic view of the apertured panel of the present invention.
  • the apertured panel 120 is configured to form a semi-surrounding shape in conformity with the shape of the air inlet 140 of the snail shell 110.
  • the so-called semi-enclosed structure means that the cross-section side of the apertured panel 120 is high on one side, that is, has a high side 121 and a low side. 122, and the hollow structure 123 in the middle, the overall cross section is J-shaped.
  • the cross-sectional low side 122 of the pupil panel 120 faces the side of the suction opening 140 of the snail shell, and the high side 121 faces the side of the ventilating fan frame 130 (not shown).
  • the high side 121 is linearly extended from the surface of the air inlet 140 provided with the snail shell 110, and the low side 122 is disposed from the high side 121 toward the side of the air inlet 140, that is, the high side 121 is provided with the air inlet 140.
  • the face is curved and extended to form a low side 122 with a certain spacing H between the front end 1221 and the suction opening 140.
  • the high side 121 of the above-mentioned J-shape is a cylindrical shape extending from the snail shell 110 in the vertical direction
  • the low side 122 is a curved surface which is arced from the high side 121 to the suction opening 140 and then stretched horizontally. shape.
  • the cross section is a shape in which a straight line in the longitudinal direction and a curve which is stretched in the horizontal direction are combined, and is approximately J-shaped. Moreover, the certain interval H portion communicates with the hollow structure through the front front portion of the suction port 140.
  • FIG. 5 it is a schematic diagram showing the relationship between the diameter of the snail shell and the apertured panel of the present invention.
  • the outer diameter L1 of the opening panel 120 is equal to the outer diameter L2 of the ventilating fan suction opening 140.
  • the outer diameter L2 of the suction opening of the volute casing 110 refers to the outermost diameter L2 of the hem portion of the bell mouth of the snail shell 110. That is, the bellows 140 of the snail shell 110 is provided with a horn-shaped panel 141 whose outer diameter L2 (diameter of the curved portion of the panel 141) and the outer diameter of the apertured panel 120, that is, the outer side of the high side 121 The path is equal.
  • the noise generated by the fan is mainly emitted from the suction port 140 of the snail shell 110.
  • the pupil panel 120 at the noise source position of the snail shell 110, the noise generated by the suction port 140 of the snail shell 110 can be smoothly sucked by the pupil panel 12Q along the guide of the ventilator snail shell bell. That is, from the front end 1221 of the apertured panel 120 and the air inlet 140 (interval H), the low side 122 enters the panel hollow structure 123, and the sucked noise repeatedly collides and diffuses in the hollow structure 123. During the process, the energy gradually weakens and the sound pressure decreases.
  • the present invention also provides a plurality of ribs 1231 on the inner side of the hollow structure 123 of the apertured panel 120.
  • the plurality of ribs 1231 are provided to divide the boring panel of the annular half-enclosed hollow structure 123 into a plurality of small spaces 200.
  • the noise generated by the air intake opening 140 (not shown) of the ventilating fan is sucked into the annular semi-surrounding hollow structure 123, and the sucked noise repeatedly collides and diffuses in a plurality of small spaces 200 of the opening panel. during this process, The energy gradually weakens and the sound pressure decreases.
  • the strength of the apertured panel can also be enhanced by the addition of a plurality of ribs 1231.
  • the rib 1231 can reduce the vibration of the opening panel 120 caused by the air flowing to the air inlet 140 of the snail shell 110, and the hollow structure 123 can make the noise reduction effect better.
  • the present invention also provides a plurality of concave and convex structures 1232 inside the hollow structure 123 of the apertured panel 120.
  • a plurality of concavo-convex structures 1232 are provided to divide the surface within the annular semi-enclosed hollow structure 123 into a plurality of planes 300 that are staggered. After the noise generated from the air inlet 140 of the ventilating fan (not shown) is sucked into the annular semi-enclosed hollow structure 123, a plurality of repeated reflections are generated on the plurality of planes 300 in the hollow structure, in the process, the sound waves The energy gradually weakens and the noise is reduced.
  • the noise value is between 2 1 and 8 d B, and the noise value is reduced by 2 d B on average compared with the prior art.
  • the first protrusion 131 and the second protrusion 132 are disposed on the outer side of the aperture panel 120, and the second protrusion 132 is provided with an opening 1321; the snail shell 110 is provided with a clamping The buckle 151 of the first bump 131 and the mounting hole 152 corresponding to the opening 1321 of the second bump 132.
  • the first protrusion 131 is first inserted into the buckle 151 on the snail shell, and then the screw passes through the opening 1321 of the second protrusion 132 and the mounting hole 152 of the snail shell 110, thereby finally The apertured panel 120 is secured to the snail shell 110. This simplifies the structure and improves product construction.
  • the buckle portion 151 shown in Fig. 3 is formed on the outer peripheral portion of the snail shell 110, because it is disposed by the tongue portion 150, and can be more easily formed. That is to say, the buckle 1 5 1 can be formed by demolding in the thick direction of the snail shell 1 1 Q.
  • the tongue portion 150 forms the smallest portion of R in the outer peripheral wall surface of the snail shell 110, the portion is not easily deformed. Therefore, the buckle position 1 5 1 can be installed more stably on the snail shell 110.
  • the first bump 133 can be set to be shorter. That is, the shorter first bump 1 is formed Not easy to deform.
  • the jaw faces 20 and the snail shells 110 are more closely mounted. Therefore, the muffling effect is more reliable.

Description

降低换气扇噪音的结构 技术领域
本发明是关于一种降低噪音结构，特别是关于一种降低换气扇噪 音的结构。 背景技术
图 1为一种公知的换气扇 10， 通常釆用设置在换气扇蜗牛壳 11 下方的开孔面板 12 (orifice) 来降低换气扇 10噪音， 该包括幵孔 面板 12与换气扇框架 13开口 14的大小相同， 并且盖住换气扇框架 13的开口 14， 通过螺丝与蜗牛壳 11固定。
像上述公知技术的换气扇的降低噪音结构， 存在以下问题： 1、 由于开孔面板 12的面积大， 其与蜗牛壳 11之间所形成的空间大， 存 在被吸入的噪音在该空间内会产生乱流从而导致噪音产生的问题； 2、 由于开孔面板 12的面积大， 所需材料多， '存在成本高的问题； 3、 由 于开孔面板 12的面积大， 在进行组装和拆除时， 需要使用多个螺丝， 存在浪费工时和施工性低下的问题。
通常情况下， 如图 2所示， 使用上述公知技术降低噪音结构的换 气扇的在 500HZ〜： L000HZ频率带时， 噪音值为 23〜14dB之间。 发明内容
本发明的主要目的在于提供一种能更好地降低噪音的降低换气 扇噪音的结构。
本发明的次要目的在于提供一种结构简单、方便组装和拆除的降 低换气扇噪音的结构。
为实现上述目的， 本发明提供的降低换气扇噪音的结构， 为固定 于蜗牛壳上的开孔面板，该开孔面板为配合蜗牛壳吸风口的形状而形 成环状的半包围中空结构， 该开孔面板只覆盖在蜗牛壳吸风口处。
所述开孔面板的断面为 J字形的中空结构， 形成低侧和高侧， 低 侧的前端与吸风口之间设有间隔。 所述的开孔面板的中空结构内侧设置若干个凸筋。
所述的开孔面板的中空结构内侧设置若干个凹凸结构。
所述的开孔面板的外侧设置第一凸块和第二凸块，第二凸块上设 有开孔；在所述的蜗牛壳上设有卡合第一凸块的扣位和对应第二凸块 上幵孔的安装孔。
所述的幵孔面板的外直径等于蜗牛壳吸风口的外直径。 本发明的优点在于， 能有效的降低噪音， 并且结构简单、 方便组 装和拆除。 附图说明
图 1是公知技术结构示意图；
图 2是公知技术结构的噪音测试图；
图 3是本发明结构总示意图；
图 4是本发明开孔面板示意图；
图 5是本发明蜗牛壳和开孔面板直径关系示意图；
图 6A是本发明开孔面板第一实施例示意图；
图 6B是本发明幵孔面板第二实施例示意图；
图 7是本发明的噪音测试图。 具体实施方式
如图 3所示， 为本发明结构总示意图。 换气扇 100包括有框架 130， 装有风机的蜗牛壳 110安装在框架 130中。 在蜗牛壳 110上固 定有开孔面板 120， 该开孔面板 120为配合蜗牛壳 110吸风口 140的 形状而形成环状的半包围中空结构，该开孔面板 120只覆盖在蜗牛壳 110的吸风口 140处。 所谓幵孔面板 120只覆盖在蜗牛壳 110的吸风 口 140处， 是指不像公知技术那样覆盖整个框架。
如图 4所示， 为本发明开孔面板示意图。该开孔面板 120是配合 蜗牛壳 110吸风口 140形状而形成半包围的结构。 所谓半包围结构， 是指该开孔面板 120的横截面一侧高一侧低，即具有高侧 121和低侧 122, 并且中间是中空结构 123， 整体断面呈 J字形。 该幵孔面板 120 横截面低侧 122对着蜗牛壳的吸风口 140侧，高侧 121对着换气扇框 架 130 (图中未示）侧。 也就是说， 从设有蜗牛壳 110的吸风口 140的 面直线延设上述高侧 121， 从该高侧 121向靠近吸风口 140侧设置低 侧 122， 即将高侧 121向设有吸风口 140的面弯曲延设， 从而形成低 侧 122，其前端 1221与吸风口 140之间设有一定的间隔 H。也就是说， 上述 J字形的高侧 121为从蜗牛壳 110向垂直方向延设的圆筒形状， 低侧 122为从高侧 121向吸风口 140画弧，然后再向水平方向拉伸的 曲面形状。另外， 其断面为由纵方向的直线和向水平方向拉伸的曲线 相组合的形状， 近似 J字形。 而且， 该一定的间隔 H部分通过吸风口 140的正前面部分与上述中空结构相连通。
如图 5所示， 为本发明蜗牛壳和开孔面板直径关系示意图。开孔 面板 120的外直径 L1等于换气扇吸风口 140的外直径 L2。 所说的蜗 牛壳 110吸风口的外直径 L2是指蜗牛壳 110的喇叭口的下摆部的最 外侧的直径 L2。 也就是说， 在蜗牛壳 110的吸风口 140设有喇叭形 状的面板 141， 该面板 141的外侧直径 L2 (面板 141弯曲开始部分的 直径） 和开孔面板 120的外径即高侧 121的外径为相等设置。
当风机运转时， 风机产生的噪音主要是从蜗牛壳 110 的吸风口 140处发出。 通过在蜗牛壳 110的吸风口 140处噪音源位置设置幵孔 面板 120， 蜗牛壳 110的吸风口 140产生的噪音可以沿着换气扇蜗牛 壳喇叭口的引导， 被幵孔面板 12Q顺畅地吸入。 即从开孔面板 120的 前端 1221与吸风口 140之间（间隔 H部分）， 由低侧 122进入到面板 中空结构 123中，被吸入的噪音在中空结构 123中反复发生碰撞而扩 散， 在此过程中， 能量逐渐减弱， 声压降低。
如图 6A所示为本发明开孔面板第一实施例示意图， 为进一步消 弱噪音，本发明还在开孔面板 120的中空结构 123内侧设置若干个凸 筋 1231。 所设置的若干个凸筋 1231， 将环状的半包围中空结构 123 . 的幵孔面板分割为若干个小空间 200。 换气扇的吸风口 140 (图中未 示）产生的噪音被吸入环状的半包围中空结构 123后， 吸入的噪音在 开孔面板的若干个小空间 200中反复发生碰撞而扩散。 在此过程中， 能量逐渐减弱， 声压降低。 通过增设若干个凸筋 1231， 还能加强开 孔面板的强度。
也就是说， 凸筋 1231可以减少因流向蜗牛壳 110吸风口 140的 空气而引起的开口面板 120的振动， 通过中空结构 123， 可以使噪音 低减的效果更好。
如图 6B所示， 为本发明开孔面板第二实施例示意图， 为进一步 消弱噪音，本发明还在开孔面板 120的中空结构 123内侧设置若干个 凹凸结构 1232。 所设置若干个凹凸结构 1232， 将环状的半包围中空 结构 123内的表面分割为多个相互交错分布的平面 300。 从换气扇的 吸风口 140(图中未示）产生的噪音被吸入环状的半包围中空结构 123 后，在中空结构内的多个平面 300上产生多次反复反射，在此过程中， 声波的能量逐渐减弱， 从而噪音降低。
如图 7所示， 在 500HZ〜： LKHZ的频率带时，噪音值为 2 1〜 8 d B之间， 相比先有技术， 噪音值平均降低了 2 d B。
请再参见图 3, 为便于安装， 开孔面板 120的外侧设置第一凸块 131和第二凸块 132， 第二凸块 132上设有开孔 1321 ; 在蜗牛壳 110 上设有卡合第一凸块 131的扣位 151和对应第二凸块 132上开孔 1321 的安装孔 152。 通过上述结构， 先将其第一凸块 131插入蜗牛壳上的 扣位 151内，再用螺丝穿过第二凸块 132上的开孔 1321和蜗牛壳 110 上的安装孔 152， 从而最终将开孔面板 120固定在蜗牛壳 110上。 由 此简化了结构， 提高产品施工性。
另外， 因为蜗牛壳由合成树脂成型而成， 如图 3所示的扣位 1 5 1在蜗牛壳 1 1 0的外周部， 因其靠舌部 150设置， 可以更加容易成 型。也就是说， 通过向蜗牛壳 1 1 Q的厚方向脱模就可以成型扣位 1 5 1。
另外，因为舌部 150在形成蜗牛壳 1 1 0的外周壁面中的 R最小 的部分， 所以， 该部分不容易变形。 因此， 扣位 1 5 1可以较稳定的 安装在蜗牛壳 1 1 0上。
另外，因为舌部 150在离吸风口 1 4 0的中心最近的位置，所以， 第一凸块 1 3 1可以设置为更短。也就是说， 较短形成的第一凸块 1 不容易变形。
而且， 通过第一凸块 1 3 1和扣位 1 5 1的相互卡合， 使幵口面 2 0与蜗牛壳 1 1 0更加紧密地安装。因此，消音效果更加可靠。

Claims

权 利 要 求
1、一种降低换气扇噪音的结构， 其特征在于：为固定于蜗牛壳上 的开孔面板，该开孔面板为配合蜗牛壳吸风口的形状而形成环状的半 包围中空结构， 该开孔面板只覆盖在蜗牛壳吸风口处。
2、根据权利要求 1所述的降低换气扇噪音的结构， 其特征在于: 所述开孔面板的断面为 J字形的中空结构， 形成低侧和高侧， 低侧的 前端与吸风口之间设有间隔。'
3、根据权利要求 2所述的降低换气扇噪音的结构， 其特征在于: 所述的开孔面板的中空结构内侧设置若干个凸筋。
4、根据权利要求 2所述的降低换气扇噪音的结构， 其特征在于: 所述的开孔面板的中空结构内侧设置若干个凹凸结构。
5、根据权利要求 2所述的降低换气扇噪音的结构， 其特征在于: 所述的开孔面板的外侧设置第一凸块和第二凸块，第二凸块上设有开 孔；在所述的蜗牛壳上设有卡合第一凸块的扣位'和对应第二凸块上开 孔的安装孔。
6、根据权利要求 2所述的降低换气扇噪音的结构， 其特征在于: 所述的幵孔面板的外直径等于蜗牛壳吸风口的外直径。 -
PCT/CN2010/001028 2010-03-17 2010-07-09 降低换气扇噪音的结构 WO2011113184A1 (zh)

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