WO2019104863A1 - 一种排气扇 - Google Patents

一种排气扇 Download PDF

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Publication number
WO2019104863A1
WO2019104863A1 PCT/CN2018/074629 CN2018074629W WO2019104863A1 WO 2019104863 A1 WO2019104863 A1 WO 2019104863A1 CN 2018074629 W CN2018074629 W CN 2018074629W WO 2019104863 A1 WO2019104863 A1 WO 2019104863A1
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Prior art keywords
plate
volute
wind wheel
end plate
rear end
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PCT/CN2018/074629
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English (en)
French (fr)
Inventor
林炎虎
黎健辉
王凤琪
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中山大洋电机股份有限公司
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Publication of WO2019104863A1 publication Critical patent/WO2019104863A1/zh

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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
    • 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
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing

Definitions

  • the utility model relates to an exhaust fan.
  • the conventional exhaust fan includes a case 1a and a volute fan
  • the case 1a includes a cover, a side plate 11a, and a bottom plate 12a, a cover plate, a side plate 11a, and a bottom plate 12a.
  • the volute fan includes a volute 2a, a wind wheel 3a and a motor 4a, the volute 2a being fixed in a receiving cavity of the casing 1a, the volute 2a including a front end plate 21a
  • the rear end plate 22a and the side panel 23a connected between the front end plate 21a and the rear end plate 22a, the front end plate 21a, the rear end plate 22a and the side panel 23a enclose a cavity 24a, and the wind wheel 3a is disposed inside the cavity 24a
  • the cover plate is provided with a slit, and the side plate 11a is provided with an opening.
  • the front end plate 21a is provided with an air inlet 25a.
  • the side panel 23a is provided with an air outlet, a slit, an air inlet 25a, a cavity 24a, and an air outlet. And the opening is connected, the motor 4a is mounted on the rear end plate 22a, the motor 4a includes a rotating shaft 41a, and the end of the wind wheel 3a near the rear end plate 22a is provided with a mounting plate 31a, and the rotating shaft 41a is connected to the mounting plate 31a to drive the wind wheel 3a. Rotation, there is no space between the rear end plate 22a of the volute 2a and the bottom plate 12a of the case 1a, and such a structure has the following problems:
  • the purpose of the utility model is to provide an exhaust fan, which can solve the problems of low efficiency and high noise of the existing exhaust fan.
  • the utility model aims to provide an exhaust fan, which comprises a box body and a volute fan, the box body comprises a cover plate, a side plate and a bottom plate, and the cover plate, the side plate and the bottom plate enclose a receiving cavity, the
  • the volute fan comprises a volute, a wind wheel and a motor, the volute being fixed in a receiving cavity of the casing, the volute comprising a front end plate, a rear end plate and being connected between the front end plate and the rear end plate
  • the side panel, the front end panel, the rear end panel and the side panel enclose a cavity, the wind wheel is disposed inside the cavity, the cover plate is provided with a slit, and the side panel is provided with an opening, and the front end plate is provided There is a first air inlet, the side panel is provided with an air outlet, the gap, the first air inlet, the cavity, the air outlet and the opening communicate to form a first ventilation channel, and the rear panel is provided with a second inlet a
  • the height of the casing described above is H, and the width of the flow passage formed between the rear end plate of the volute and the bottom plate of the casing is H1, and 0.07 ⁇ H1/H ⁇ 0.15.
  • the above-mentioned core plate divides the wind wheel into a front wind wheel and a rear wind wheel.
  • the width of the front wind wheel is L1
  • the width of the rear wind wheel is L2
  • the width L1 of the front wind wheel is wider than the width of the rear wind wheel.
  • L2 is wide.
  • the core plate described above is provided with a through hole.
  • the above-mentioned core plate is provided with six through holes and is evenly distributed.
  • a support column is disposed on the rear end plate of the volute.
  • An exhaust fan comprising a box body and a volute fan, the box body comprising a cover plate, a side plate and a bottom plate, the cover plate, the side plate and the bottom plate enclosing the receiving cavity, the volute fan comprising a volute a casing, a wind wheel and a motor, the volute being fixed in a receiving cavity of the casing, the volute comprising a front end plate, a rear end plate and a side panel connected between the front end plate and the rear end plate, the front end The plate, the rear end plate and the side panel enclose a cavity, the wind wheel is disposed inside the cavity, the cover plate is provided with a slit, the side plate is provided with an opening, and the front end plate is provided with a first air inlet The side panel is provided with an air outlet, the gap, the first air inlet, the cavity, the air outlet and the opening communicate to form a first ventilation passage, and the rear end panel is provided with a second air inlet, A wind channel is formed between the side
  • the height of the box is H
  • the width of the flow path formed between the rear end plate of the volute and the bottom plate of the box is H1
  • the efficiency of the exhaust fan is higher when 0.07 ⁇ H1/H ⁇ 0.5 is satisfied.
  • the noise is smaller.
  • the above-mentioned core plate divides the wind wheel into a front wind wheel and a rear wind wheel.
  • the width of the front wind wheel is L1
  • the width of the rear wind wheel is L2
  • the width of the front wind wheel is L1 than that of the rear wind wheel.
  • the width of the L2 is wide, easy to install and the exhaust fan is more efficient and less noisy.
  • the width of the wind wheel described above is L, which satisfies 0.1 ⁇ L2 / L ⁇ 0.2, the height of the box body is H, and the distance between the rear end plate of the volute and the bottom plate of the box is H1 When 0.07 ⁇ H1/H ⁇ 0.15, the efficiency of the exhaust fan is the highest, and the noise improvement effect is the best.
  • the through hole is provided on the core plate, which can effectively reduce the noise of the exhaust fan.
  • the core plate is provided with six through holes, and is evenly distributed to reduce the noise effect.
  • the rear end plate of the volute is provided with a support column, and the volute is supported on the bottom plate of the case.
  • FIG. 1 is a front view of an exhaust fan provided with a cover removed;
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • FIG. 3 is a perspective view of a volute fan provided by an embodiment of the present invention.
  • FIG. 4 is a perspective view of an exhaust fan after removing a cover plate according to an embodiment of the present invention.
  • Figure 5 is a perspective view of another angle of the exhaust fan after removing the cover plate according to an embodiment of the present invention.
  • Figure 6 is a front elevational view of the exhaust fan after removing the cover plate according to an embodiment of the present invention.
  • Figure 7 is a cross-sectional view taken along line B-B of Figure 6;
  • Figure 8 is a cross-sectional view taken along line C-C of Figure 6;
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the present embodiment provides an exhaust fan including a case 1 and a volute fan.
  • the case 1 includes a cover 11 , a side plate 12 , and a bottom plate 13 .
  • the side panel 12 and the bottom plate 13 enclose a receiving cavity, the volute fan comprising a volute 2, a wind wheel 3 and a motor 4, the volute 2 being fixed in a receiving cavity of the casing 1,
  • the volute 2 includes a front end plate 21, a rear end plate 22, and a side panel 23 connected between the front end plate 21 and the rear end plate 22, the front end plate 21, the rear end plate 22 and the side panel 23 enclosing a cavity 24, the wind
  • the wheel 3 is disposed in the cavity 24, the cover 11 is provided with a slit 110, and the side plate 12 is provided with an opening 120.
  • the front end plate 21 is provided with a first air inlet 25, and the side panel 23 is disposed. There is an air outlet 26, the gap 110, the first air inlet 25, the cavity 24, the air outlet 26 and the opening 120 communicate with each other to form a first ventilation passage, wherein the rear end plate 22 is provided with a second
  • the air inlet 28 forms a duct 5 between the side plate (12) of the casing 1 and the side panel 23 of the volute 2, and the rear end plate 22 of the volute 2 and the bottom plate 13 of the casing 1 Forming a flow path 6, the seam 110, the air duct 5, the flow path 6, the second air inlet 28, the cavity 24, the air outlet 26 and the opening 120 communicate to form a second ventilation passage, and the motor 4 is mounted on the bottom plate 13, the wind wheel 3
  • the motor 4 includes a rotating shaft 41 that connects the core plate 31 to drive the wind wheel 3 to rotate.
  • the second air flow direction is formed, that is, the air flow Through the gap, air passage, flow passage, second air inlet, cavity, air outlet and outlet, the air inlet area is increased, the wind speed of the air inlet is reduced, the dynamic pressure is reduced, and the loss at the air inlet can also be reduced. Therefore, the efficiency of the exhaust fan can be effectively improved, the input power of the motor can be reduced, and the wind speed can be reduced, and after a part of the wind flows through the inside of the box, the noise of the exhaust fan can be effectively improved.
  • the height of the casing 1 is H
  • the width of the flow passage 6 formed between the rear end plate 22 of the volute 2 and the bottom plate 13 of the casing 1 is H1, and 0.07 ⁇ H1/H ⁇ 0.15.
  • the core plate 31 divides the wind wheel 3 into a front wind wheel 32 having a width L1 and a rear wind wheel 33 having a width L1 and a front wind wheel 32.
  • the front wind wheel 32 has a width L1 and a front wind wheel 32.
  • the width L1 is wider than the width L2 of the rear wind wheel 33.
  • the width of the wind wheel 2 is L, and 0.1 ⁇ L2 / L ⁇ 0.2 is satisfied.
  • the core plate 31 is provided with a through hole 310.
  • the core plate 31 is provided with six through holes 310 and is evenly distributed.
  • the rear end plate 22 of the volute 2 is provided with a support column 27.

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

Abstract

一种排气扇，包括箱体(1)和蜗壳风机。蜗壳风机包括蜗壳(2)、风轮(3)和电机(4)。箱体(1)的盖板(11)的缝隙(110)、蜗壳(2)的前端板(21)的第一进风口(25)、蜗壳(2)的空腔(24)、蜗壳(2)的侧面板(23)的出风口(26)及箱体(1)的侧板(12)的开口(120)形成第一通风通道。缝隙(110)、侧板(12)与侧面板(23)之间的风道(5)、蜗壳(2)的后端板(22)与箱体(1)的底板(13)之间的流道(6)、后端板(22)的第二进风口(28)、空腔(24)、出风口(26)及开口(120)形成第二通风通道。该排气扇增加一个通风通道，增大了进风面积，提高了效率，改善了噪音。

Description

一种排气扇 技术领域：
本实用新型涉及一种排气扇。
背景技术：
如图1和图2所示，现有的排气扇包括箱体1a和蜗壳风机，所述的箱体1a包括盖板、侧板11a和底板12a，盖板、侧板11a和底板12a围成容纳腔，所述的蜗壳风机包括蜗壳2a、风轮3a和电机4a，所述的蜗壳2a被固定在箱体1a的容纳腔内,所述的蜗壳2a包括前端板21a、后端板22a和连接在前端板21a和后端板22a之间的侧面板23a，前端板21a、后端板22a和侧面板23a围成空腔24a，风轮3a设置在空腔24a里面,盖板上设有缝隙，侧板11a上设有开口，所述的前端板21a上设有进风口25a，侧面板23a上设置有出风口，缝隙、进风口25a、空腔24a、出风口以及开口连通，所述的电机4a安装在后端板22a上，电机4a包括转轴41a,风轮3a靠近后端板22a的一端设有安装板31a,转轴41a连接安装板31a以驱动风轮3a转动，蜗壳2a的后端板22a与箱体1a的底板12a之间没有间距，这样的结构存在以下问题：
1)由于蜗壳2a只有前端板21a设置进风口25a，后端板22a封闭，电机4a安装在封闭的后端板22a上，因此风轮3a为单侧进风，导致排气扇的效率低和噪音大。
2)由于蜗壳2a安装在箱体1a内，蜗壳2a的后端板22a与箱体1a的底板12a之间没有间距，本领域技术人员通常认为在后端板22a上开进风口也是会被箱体1a的底板12a挡住，起不到进风效果。
发明内容：
本实用新型的目的是提供一种排气扇，能解决现有排气扇效率低和噪音大的问题。
本实用新型的目的是通过下述技术方案予以实现的。
本实用新型的目的是提供一种排气扇，包括箱体和蜗壳风机，所述的箱体包括盖板、侧板和底板，盖板、侧板和底板围成容纳腔，所述的蜗壳风机包括 蜗壳、风轮和电机，所述的蜗壳被固定在箱体的容纳腔内，所述的蜗壳包括前端板、后端板和连接在前端板和后端板之间的侧面板，前端板、后端板和侧面板围成空腔，风轮设置在空腔里面，所述的盖板上设有缝隙，侧板上设有开口，所述的前端板上设有第一进风口，侧面板上设置有出风口，所述的缝隙、第一进风口、空腔、出风口以及开口连通形成第一通风通道，所述的后端板上设置有第二进风口，所述的箱体的侧板与蜗壳的侧面板之间形成风道，所述的蜗壳的后端板与箱体的底板之间形成流道，所述的缝隙、风道、流道、第二进风口、空腔、出风口以及开口连通形成第二通风通道，所述的电机安装在底板上，所述的风轮设有心板，电机包括转轴，转轴连接心板以驱动风轮转动。
上述所述的箱体的高度为H，蜗壳的后端板与箱体的底板之间形成的流道的宽度为H1，则0.07≤H1/H≤0.15。
上述所述的心板将风轮分为前风轮和后风轮，所述的前风轮的宽度为L1，后风轮的宽度为L2，前风轮的宽度L1比后风轮的宽度L2宽。
上述所述的风轮的宽度为L，则满足0.1≤L2/L≤0.2。
上述所述的心板上设有通孔。
上述所述的心板上设有六个通孔，且均匀分布。
上述所述蜗壳的后端板上设有支撑柱。
本实用新型与现有技术相比，具有如下效果：
1)一种排气扇，包括箱体和蜗壳风机，所述的箱体包括盖板、侧板和底板，盖板、侧板和底板围成容纳腔，所述的蜗壳风机包括蜗壳、风轮和电机，所述的蜗壳被固定在箱体的容纳腔内，所述的蜗壳包括前端板、后端板和连接在前端板和后端板之间的侧面板，前端板、后端板和侧面板围成空腔，风轮设置在空腔里面，所述的盖板上设有缝隙，侧板上设有开口，所述的前端板上设有第一进风口，侧面板上设置有出风口，所述的缝隙、第一进风口、空腔、出风口以及开口连通形成第一通风通道，所述的后端板上设置有第二进风口，所述的箱体的侧板与蜗壳的侧面板之间形成风道，所述的蜗壳的后端板与箱体的底板之间形成流道，所述的缝隙、风道、流道、第二进风口、空腔、出风口以及开 口连通形成第二通风通道，所述的电机安装在底板上，所述的风轮设有心板，电机包括转轴，转轴连接心板以驱动风轮转动，蜗壳的后端板与箱体的底板之间形成流道，与现有技术相比间距增大，则减小进风阻力，排气扇除了第一通风通道可以进风外，还可以通过第二通风通道进风，增大了进风面积，进风口的风速会减小，动压减小，进风口处损失也可以减小，因此可以有效的提升排气扇的效率，降低电机的输入功率，另外风速减小，且有一部分的风从箱体里面流过以后，排气扇的噪音也可以得到有效的改善。
2)箱体的高度为H，蜗壳的后端板与箱体的底板之间形成的流道的宽度为H1，满足0.07≤H1/H≤0.5时，排气扇的效率会更高，噪音更小。
3)上述所述的心板将风轮分为前风轮和后风轮，所述的前风轮的宽度为L1，后风轮的宽度为L2，前风轮的宽度L1比后风轮的宽度L2宽，方便安装且排气扇的效率会更高，噪音更小。
4)上述所述的风轮的宽度为L，则满足0.1≤L2/L≤0.2，所述的箱体的高度为H，蜗壳的后端板与箱体的底板之间有间距为H1，则0.07≤H1/H≤0.15时，排气扇的效率最高，改善噪音效果最好。
5)所述的心板上设有通孔，可以有效的降低排气扇的噪音。
6)所述的心板上设有六个通孔，且均匀分布，降低噪音效果更好。
7)上述所述蜗壳的后端板上设有支撑柱，将蜗壳支撑在箱体的底板上。
附图说明：
图1是背景技术提供拆去盖板后的排气扇的主视图；
图2是图1中A-A剖视图；
图3是本实用新型实施例提供的蜗壳风机的立体图；
图4是本实用新型实施例提供的拆去盖板后的排气扇的立体图；
图5是本实用新型实施例提供的拆去盖板后的排气扇的另一角度的立体图；
图6是本实用新型实施例提供的拆去盖板后的排气扇的主视图；
图7是图6中B-B剖视图；
图8是图6中C-C剖视图。
具体实施方式：
下面通过具体实施例并结合附图对本实用新型作进一步详细的描述。
实施例一：
如图3至图8所示，本实施例提供的是一种排气扇，包括箱体1和蜗壳风机，所述的箱体1包括盖板11、侧板12和底板13，盖板11、侧板12和底板13围成容纳腔，所述的蜗壳风机包括蜗壳2、风轮3和电机4，所述的蜗壳2被固定在箱体1的容纳腔内，所述的蜗壳2包括前端板21、后端板22和连接在前端板21和后端板22之间的侧面板23，前端板21、后端板22和侧面板23围成空腔24，风轮3设置在空腔24里面，所述的盖板11上设有缝隙110，侧板12上设有开口120，所述的前端板21上设有第一进风口25，侧面板23上设置有出风口26，所述的缝隙110、第一进风口25、空腔24、出风口26以及开口120连通形成第一通风通道，其特征在于：所述的后端板22上设置有第二进风口28，所述的箱体1的侧板(12)与蜗壳2的侧面板23之间形成风道5，所述的蜗壳2的后端板22与箱体1的底板13之间形成流道6，所述的缝隙110、风道5、流道6、第二进风口28、空腔24、出风口26以及开口120连通形成第二通风通道，所述的电机4安装在底板13上，所述的风轮3设有心板31，电机4包括转轴41，转轴41连接心板31以驱动风轮3转动。
原来进风流向只有一个，即风流经缝隙、第一进风口、空腔、出风口、开口，本发明在后端板上设置第二进风口后，则形成第二个进风流向，即风流经缝隙、风道、流道、第二进风口、空腔、出风口、出口，增大了进风面积，进风口的风速会减小，动压减小，进风口处损失也可以减小，因此可以有效的提升排气扇的效率，降低电机的输入功率，另外风速减小，且有一部分的风从箱体里面流过以后，排气扇的噪音也可以得到有效的改善。
优选的，所述的箱体1的高度为H，蜗壳2的后端板22与箱体1的底板13之间形成的流道6的宽度为H1，则0.07≤H1/H≤0.15。
优选的，所述的心板31将风轮3分为前风轮32和后风轮33，所述的前风 轮32的宽度为L1，后风轮33的宽度为L2，前风轮32的宽度L1比后风轮33的宽度L2宽。
优选的，所述的风轮2的宽度为L，则满足0.1≤L2/L≤0.2。
优选的，所述的心板31上设有通孔310。
优选的，所述的心板31上设有六个通孔310，且均匀分布。
优选的，所述蜗壳2的后端板22上设有支撑柱27。
以上实施例为本发明的较佳实施方式，但本发明的实施方式不限于此，其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均为等效的置换方式，都包含在本发明的保护范围之内。

Claims (7)

  1. 一种排气扇，包括箱体(1)和蜗壳风机，所述的箱体(1)包括盖板(11)、侧板(12)和底板(13)，盖板(11)、侧板(12)和底板(13)围成容纳腔，所述的蜗壳风机包括蜗壳(2)、风轮(3)和电机(4)，所述的蜗壳(2)被固定在箱体(1)的容纳腔内，所述的蜗壳(2)包括前端板(21)、后端板(22)和连接在前端板(21)和后端板(22)之间的侧面板(23)，前端板(21)、后端板(22)和侧面板(23)围成空腔(24)，风轮(3)设置在空腔(24)里面，所述的盖板(11)上设有缝隙(110)，侧板(12)上设有开口(120)，所述的前端板(21)上设有第一进风口(25)，侧面板(23)上设置有出风口(26)，所述的缝隙(110)、第一进风口(25)、空腔(24)、出风口(26)以及开口(120)连通形成第一通风通道，其特征在于：所述的后端板(22)上设置有第二进风口(28)，所述的箱体(1)的侧板(12)与蜗壳(2)的侧面板(23)之间形成风道(5)，所述的蜗壳(2)的后端板(22)与箱体(1)的底板(13)之间形成流道(6)，所述的缝隙(110)、风道(5)、流道(6)、第二进风口(28)、空腔(24)、出风口(26)以及开口(120)连通形成第二通风通道，所述的电机(4)安装在底板(13)上，所述的风轮(3)设有心板(31)，电机(4)包括转轴(41)，转轴(41)连接心板(31)以驱动风轮(3)转动。
  2. 根据权利要求1所述的一种排气扇，其特征在于：所述的箱体(1)的高度为H，蜗壳(2)的后端板(22)与箱体(1)的底板(13)之间形成的流道(6)的宽度为H1，则0.07≤H1/H≤0.15。
  3. 根据权利要求1或2所述的一种排气扇，其特征在于：所述的心板(31)将风轮(3)分为前风轮(32)和后风轮(33)，所述的前风轮(32)的宽度为L1，后风轮(33)的宽度为L2，前风轮(32)的宽度L1比后风轮(33)的宽度L2宽。
  4. 根据权利要求3所述的一种排气扇，其特征在于：所述的风轮(2)的宽度为L，则满足0.1≤L2/L≤0.2。
  5. 根据权利要求1或2所述的一种排气扇，其特征在于：所述的心板(31) 上设有通孔(310)。
  6. 根据权利要求6所述的一种排气扇，其特征在于：所述的心板(31)上设有六个通孔(310)，且均匀分布。
  7. 根据权利要求1或2所述的一种排气扇，其特征在于：所述蜗壳(2)的后端板(22)上设有支撑柱(27)。
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