WO2023226393A1 - 混流风机及风管机 - Google Patents

混流风机及风管机 Download PDF

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Publication number
WO2023226393A1
WO2023226393A1 PCT/CN2022/140285 CN2022140285W WO2023226393A1 WO 2023226393 A1 WO2023226393 A1 WO 2023226393A1 CN 2022140285 W CN2022140285 W CN 2022140285W WO 2023226393 A1 WO2023226393 A1 WO 2023226393A1
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Prior art keywords
flow fan
mixed
guide cone
air outlet
volute
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PCT/CN2022/140285
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English (en)
French (fr)
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严东
丁绍军
池晓龙
张一帆
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珠海格力电器股份有限公司
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Publication of WO2023226393A1 publication Critical patent/WO2023226393A1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans

Definitions

  • the present disclosure relates to the technical field of air treatment equipment, in particular to a mixed-flow fan and an air duct fan.
  • the duct machine is a type of air conditioner.
  • some duct machines use the method of emitting cold air from the top and hot air from the bottom. This can achieve waterfall cooling and carpet-type heating.
  • the air outlet of the air duct fan is reversible.
  • the air duct fan with reversible air outlet usually uses a cross-flow fan or a centrifugal fan.
  • the wind direction cannot be reversible after reversal. , therefore, only at least two fans can be installed, one responsible for forward air discharge and one responsible for reverse air discharge. In this way, not only the structure of the air duct machine will be larger, but also the cost will be higher.
  • the fan In order to reduce costs, the fan needs to be smaller, and the mixed-flow fan is a fan between the axial flow fan and the centrifugal fan.
  • the impeller of the mixed-flow fan allows the air to move both centrifugally and axially, and the airflow movement in the volute is mixed. It combines two forms of motion, axial flow and centrifugal flow, so it is called "mixed flow”.
  • the mixed-flow fan can not only make the volume smaller, but also ensure the direction and pressure of the air flow.
  • An embodiment of the present disclosure provides a mixed flow fan and an air duct machine to alleviate the problem of low energy efficiency of the mixed flow fan.
  • Some embodiments of the present disclosure provide a mixed-flow fan, including: a volute, an air outlet is provided on the volute; a guide cone, the guide cone is provided at the air outlet, and the air outlet is The airflow flows through the guide cone; the generating line of the guide cone includes connected straight line segments and curved segments.
  • t is the independent variable, and the value range of t is (0,1), P0 is the bottom end point of the guide cone, P1 is the connection point between the straight line segment and the curve segment of the guide cone, and P3 is the The top endpoint, P2, is the arc control point of the curve segment.
  • the ratio range of the height dimension H1 corresponding to the straight line segment and the height dimension H2 corresponding to the curve segment is 0 ⁇ H1/H2 ⁇ 1 .
  • the mixed flow fan further includes an inner shell, the inner shell is disposed in the volute, and an annular flow channel is formed between the inner shell and the volute, and the annular flow channel is One end forms the air outlet, and the guide cone is arranged on the inner shell.
  • the portion of the flow guide cone corresponding to the straight line segment is connected to the inner shell.
  • the straight line segment is tangent to the portion of the inner shell where the air outlet is formed.
  • the mixed-flow fan further includes guide vanes, the guide vanes are arranged in the annular flow channel, the first edge of the guide vanes is fixedly arranged on the outer surface of the inner shell, and the guide vanes The second edge is fixedly arranged on the inner surface of the volute.
  • the outer surface of the volute is a curved surface.
  • the volute is a ball table structure, and the maximum diameter of the volute is equal to the diameter of the ball table structure.
  • the volute is provided with an air inlet and an air outlet respectively at two end surfaces of the ball table structure.
  • the mixed-flow fan and air duct machine provided by the present disclosure set the busbar of the flow guide cone into a straight segment and a curved segment.
  • the curved segment is used to guide the airflow that produces the Coanda effect and avoid the airflow in the
  • the eddy current is generated at the air outlet and affects the air output effect of the mixed-flow fan.
  • the straight section is set tangent to the inner shell to avoid the step structure at the connection between the straight section and the inner shell, which affects the air flow, and further ensures the air output effect of the mixed-flow fan. .
  • Figure 1 is a schematic structural diagram of a mixed-flow fan according to an embodiment of the present disclosure
  • Figure 2 is a cross-sectional view of a flow guide cone according to an embodiment of the present disclosure
  • the present disclosure provides a volute 1, which is provided with an air outlet 12; and a flow guide cone 2, which is provided at the air outlet 12, And the airflow from the air outlet 12 flows through the guide cone 2; the generatrix of the guide cone 2 includes a connected straight line segment 21 and a curved segment 22.
  • the busbar of the guide cone 2 is set into a straight section 21 and a curve section 22.
  • the curve section 22 is used to guide the air flow that produces the Coanda effect to avoid the air flow from generating vortex at the air outlet 12. Affects the air output effect of the mixed flow fan.
  • t is the independent variable, and the value range of t is (0,1), P0 is the bottom end point of the guide cone 2, P1 is the connection point between the straight line segment 21 and the curve segment 22 of the guide cone 2, and P3 is The top end point of the guide cone 2, P2, is the arc control point of the curve segment 22.
  • the ratio range of the corresponding height dimension H1 of the straight line segment 21 to the corresponding height dimension H2 of the curved segment 22 is 0 ⁇ H1/H2 ⁇ 1. That is, the ratio range of the height dimension H1 of the straight line segment 21 to the height dimension H2 of the curved segment 22 is 0 ⁇ H1/H2 ⁇ 1.
  • the ratio is 0, it means that the busbar of the guide cone 2 does not have a straight line segment 21 at this time, but only an arc segment. Since there is no transition of the straight line segment 21, a smooth transition cannot be formed between the inner shell and the guide cone 2.
  • the air volume and calculated pressure head basically reach the maximum value, and the calculation efficiency of the mixed-flow fan at this time is also basically maximum.
  • H1/H2 increases to 0.8, the air volume and calculated pressure head The pressure heads begin to decrease, and the calculation efficiency at this time also begins to decrease.
  • H1/H2 continues to increase to 1, the air volume and calculation pressure head further decrease, and the calculation efficiency further decreases.
  • the mixed-flow fan also includes an inner shell 3.
  • the inner shell 3 is arranged in the volute 1, and an annular flow channel is formed between the inner shell 3 and the volute 1.
  • One end of the annular flow channel The air outlet 12 is formed, and the guide cone 2 is arranged on the inner shell 3 .
  • the inner shell 3 is used to install the impeller of the mixed-flow fan and its driving motor, and the annular flow channel is used to guide the airflow discharged from the impeller to a certain extent, so that the airflow at the air outlet 12 can converge to the same place after being discharged. This ensures the air output effect of the mixed-flow fan.
  • the guide cone 2 is arranged on the inner shell 3, and the guide cone 2 can be used to further guide the air flow in the annular flow channel to avoid eddy currents caused by the convergence of multi-directional air flows. , to ensure the air output effect of the mixed flow fan.
  • the portion of the guide cone 2 corresponding to the straight line segment 21 is connected to the inner shell 3 . That is to say, the airflow from the air outlet 12 flows through the straight section 21 and the curved section 22 in sequence, so that the curved section 22 is fully used to guide the airflow that produces the Coanda effect, and avoids the airflow from generating eddy currents at the air outlet 12 and affecting the performance of the mixed flow fan. Wind effect.
  • the straight section 21 is arranged tangentially to the portion of the inner shell 3 where the air outlet 12 is formed. This avoids the formation of a step structure at the connection between the straight section 21 and the inner shell 3, which affects the air flow, and further ensures the air output effect of the mixed-flow fan.
  • the mixed-flow fan also includes guide vanes 4.
  • the guide vanes 4 are arranged in the annular flow channel.
  • the first edge of the guide vanes 4 is fixedly arranged on the outer surface of the inner shell 3.
  • the guide vanes 4 have The second edge is fixedly arranged on the inner surface of the volute 1 .
  • the guide vanes 4 are used to further guide the air flow in the annular flow channel to ensure the air output effect of the mixed flow fan.
  • the outer surface of the volute 1 is a curved surface. That is, the cross section of the outer surface of the volute 1 is a curved segment 22 .
  • the volute 1 is a ball table structure, and the maximum diameter of the volute 1 is equal to the diameter of the ball table structure. That is to say, the volute 1 can rotate freely in a spherical space with a fixed diameter centered on the center of the ball table structure.
  • the inside of the air duct machine can be
  • the mixed-flow fan provided in this application provides a spherical space with a fixed diameter, and the rotation of the mixed-flow fan realizes switching of the air inlet and outlet directions of the air duct machine.
  • the volute 1 is provided with an air inlet 11 and an air outlet 12 respectively at two end surfaces of the table structure.
  • air vents air inlet 11 and air outlet 12
  • the size of the air vents can be ensured and the safety hazard caused by opening holes in the curved surface of the volute 1 and exposing the internal structure of the volute 1 can be avoided.
  • the present disclosure also provides an air duct machine, including the above-mentioned mixed flow fan.

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  • 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)

Abstract

本公开涉及一种混流风机及风管机。混流风机包括：蜗壳，所述蜗壳上设置有出风口；导流锥，所述导流锥设置于所述出风口处，且所述出风口的气流流经所述导流锥；所述导流锥的母线包括相连的直线段和曲线段。本公开提供的混流风机及风管机，将导流锥的母线设置成直线段加曲线段，在保证导流效果的前提下，利用曲线段将产生附壁效应的气流进行引导，避免气流在出风口处产生涡流而影响混流风机的出风效果，同时使直线段与内壳相切设置，避免直线段与内壳的连接处产生台阶结构而影响气流流动，进一步保证混流风机的出风效果。

Description

混流风机及风管机
相关申请的交叉引用
本公开是以CN申请号为202210584074.9，申请日为2022年5月27日的申请为 基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及空气处理设备技术领域，特别是一种混流风机及风管机。
背景技术
风管机是空调的一种，为了提高舒适性，有些风管机采用上出冷风，下出热风的方式，这样可以实现瀑布式制冷和地毯式暖风，为了实现这种出风方式，需要风管机的出风可逆，在一些相关技术中，出风可逆的风管机通常采用贯流风机、离心风机，但是这种风机由于风机扇叶的设置方式的问题，反转后风向不能可逆，因此，只能在设置至少两个风机，一个负责正向出风，一个负责逆向出风，这样不仅风管机结构会更大，成本更高。
为了减小成本，需要将风机缩小，而混流风机是介于轴流风机和离心风机之间的风机，混流风机的叶轮让空气既做离心运动又做轴向运动，蜗壳内的气流运动混合了轴流与离心两种运动形式，所以叫“混流”。而且，混流风机不仅可以将体积做小，而且可以保证气流的流向和风压。
一些相关技术中的混流风机的导流锥设计不合理，导致混流风机的能效低。
发明内容
本公开实施例中提供一种混流风机以及风管机，以缓解混流风机能效低的问题。
本公开一些实施例中提供一种混流风机，包括：蜗壳，所述蜗壳上设置有出风口；导流锥，所述导流锥设置于所述出风口处，且所述出风口的气流流经所述导流锥；所述导流锥的母线包括相连的直线段和曲线段。
所述导流锥的母线的计算公式为：
Figure PCTCN2022140285-appb-000001
Figure PCTCN2022140285-appb-000002
其中：t为自变量，且t的取值范围为(0,1)，P0为导流锥的底部端点，P1为导流锥的直线段与曲线段的连接点，P3为导流锥的顶部端点，P2为曲线段的弧形控制点。
在一些实施例中，沿所述导流锥的回转轴线方向，所述直线段的所对应的高度尺寸H1与所述曲线段所对应的高度尺寸H2的比值范围为0＜H1/H2＜1。
在一些实施例中，所述混流风机还包括内壳，所述内壳设置于所述蜗壳内，且所述内壳与所述蜗壳之间形成环形流道，所述环形流道的一端构成所述出风口，所述导流锥设置于所述内壳上。
在一些实施例中，所述直线段所对应的所述导流锥的部位与所述内壳相连。
在一些实施例中，所述直线段与所述内壳形成所述出风口的部位相切。
在一些实施例中，所述混流风机还包括导叶，所述导叶设置于所述环形流道内，所述导叶的第一边沿与所述内壳的外表面固定设置，所述导叶的第二边沿与所述蜗壳的内表面固定设置。
在一些实施例中，所述蜗壳的外表面为曲面。
在一些实施例中，所述蜗壳为球台结构，所述蜗壳的最大直径等于球台结构的直径。
在一些实施例中，所述蜗壳位于球台结构的两个端面处分别开设有进风口和所述出风口。
本公开另一些实施例中提供一种风管机，包括上述混流风机。
本公开提供的混流风机及风管机，将导流锥的母线设置成直线段加曲线段，在保证导流效果的前提下，利用曲线段将产生附壁效应的气流进行引导，避免气流在出风口处产生涡流而影响混流风机的出风效果，同时使直线段与内壳相切设置，避免直线段与内壳的连接处产生台阶结构而影响气流流动，进一步保证混流风机的出风效果。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本申请的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1为本公开提供的实施例的混流风机的结构示意图；
图2为本公开提供的实施例的导流锥的剖视图；
图中：
1、蜗壳；11、进风口；12、出风口；2、导流锥；21、直线段；22、曲线段；3、内壳；4、导叶。
具体实施方式
下面将结合本公开实施例中的附图，对实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本公开的一部分实施例，而不是全部的实施例。基于本公开的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开保护范围的限制。
如图1和图2所示，本公开提供一种蜗壳1，所述蜗壳1上设置有出风口12；导流锥2，所述导流锥2设置于所述出风口12处，且所述出风口12的气流流经所述导流锥2；所述导流锥2的母线包括相连的直线段21和曲线段22。将导流锥2的母线设置成直线段21加曲线段22，在保证导流效果的前提下，利用曲线段22将产生附壁效应的气流进行引导，避免气流在出风口12处产生涡流而影响混流风机的出风效果。
所述导流锥2的母线的计算公式为：
Figure PCTCN2022140285-appb-000003
Figure PCTCN2022140285-appb-000004
其中：t为自变量，且t的取值范围为(0,1)，P0为导流锥2的底部端点，P1为导流锥2的直线段21与曲线段22的连接点，P3为导流锥2的顶部端点，P2为曲线 段22的弧形控制点。
沿所述导流锥2的回转轴线方向，所述直线段21的所对应的高度尺寸H1与所述曲线段22所对应的高度尺寸H2的比值范围为0＜H1/H2＜1。也即，直线段21的高度尺寸H1与曲线段22的高度尺寸H2的比值范围为0＜H1/H2＜1。当比值为0时，即说明此时的导流锥2的母线没有直线段21，只有弧线段，由于没有直线段21的过渡，使得内壳与导流锥2之间无法形成光滑过渡，从而影响混流风机的出风效果，同时无法在出风口12处起到有效的导流作用，会使得导流锥2后方聚集涡流，不利于混流风机带压能力的提升以及混流风机效率的保持。而当比值为1时，此时导流锥2的高度过大，并且导流锥2会产生尖部，而该尖部会超出风机的旋转半径，在混流风机旋转来切换出风方向时，会与壳体发生干涉，并且较大尺寸的导流锥2会影响混流风机的出气流动，使得风机带压能力下降，效率下降。
对本例的混流风机进行仿真试验，改变H1/H2的数值，仿真结果如下：
H1/H2 转速(rpm) 计算风量(m 3/h) 计算压头(Pa) 计算效率(％)
0 2200 510 90.4 69.2
0.4 2200 497 89.2 63.4
0.8 2200 494 87.3 63.2
1 2200 491 86.4 61.4
1.3 2200 480 81.4 58.7
根据仿真数据可知，当H1/H2为0.4时，风量和计算压头基本上达到最大值，此时的混流风机的计算效率也基本上最大，当H1/H2增大到0.8时，风量和计算压头均开始减小，此时的计算效率也开始减小，当H1/H2继续增大到1时，风量和计算压头进一步减少，计算效率进一步减小，而当H1/H2继续增大到1.3时，也即此时直线段21的占比较大，难以对气流产生导流作用，风量以及带压能力均下降明显；当H1/H2减小到0时，风量、计算压头和计算效率虽然达到最大值，但由于没有直线段21的过渡，使得内壳3与导流锥2之间无法形成光滑过渡，从而影响混流风机的出风效果，同时无法在出风口12处起到有效的导流作用，会使得导流锥2后方聚集涡流，不利于混流风机带压能力的提升以及混流风机效率的保持。
所述混流风机还包括内壳3，所述内壳3设置于所述蜗壳1内，且所述内壳3与所述蜗壳1之间形成环形流道，所述环形流道的一端构成所述出风口12，所述导流锥 2设置于所述内壳3上。利用内壳3对混流风机的叶轮及其驱动电机进行安装，同时利用环形流道对叶轮排出的气流进行一定程度的导流，使得出风口12处的气流能够在排出后向同一处进行汇聚，从而保证混流风机的出风效果，同时将导流锥2设置在内壳3上，能够利用导流锥2对环形流道内的气流进一步的导流，避免多方向的气流汇聚后产生涡流等情况，保证混流风机的出风效果。
所述直线段21所对应的所述导流锥2的部位与所述内壳3相连。也即出风口12的气流是依次流经直线段21和曲线段22的，从而充分利用曲线段22将产生附壁效应的气流进行引导，避免气流在出风口12处产生涡流而影响混流风机的出风效果。
所述直线段21与所述内壳3形成所述出风口12的部位相切设置。避免直线段21与内壳3的连接处产生台阶结构而影响气流流动，进一步保证混流风机的出风效果。
所述混流风机还包括导叶4，所述导叶4设置于所述环形流道内，所述导叶4的第一边沿与所述内壳3的外表面固定设置，所述导叶4的第二边沿与所述蜗壳1的内表面固定设置。利用导叶4进一步的对环形流道内的气流进行导向，保证混流风机的出风效果。
所述蜗壳1的外表面为曲面。也即蜗壳1的外表面的截面为曲线段22。
所述蜗壳1为球台结构，所述蜗壳1的最大直径等于球台结构的直径。也即，蜗壳1可以以球台结构的球心为中心的一个直径固定的球形空间内进行自由转动，当应用于风管机且风管机需求为上下出风时，风管机内可以为本申请提供的混流风机提供一个直径固定的球形空间，通过混流风机的转动来实现风管机进出风方向的切换。
所述蜗壳1位于球台结构的两个端面处分别开设有进风口11和所述出风口12。通过在端面处开设风口(进风口11、出风口12)，即能够保证风口的尺寸，还能够避免在蜗壳1的曲面部分开孔而造成蜗壳1内部结构暴露所产生的安全隐患。
本公开还提供一种风管机，包括上述混流风机。
在本公开的描述中，需要理解的是，使用“第一”、“第二”、“第三”等词语来限定零部件，仅仅是为了便于对上述零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本公开保护范围的限制。
另外，在没有明确否定的情况下，其中一个实施例的技术特征可以有益地与其他一个或多个实施例相互结合。
最后应当说明的是:以上实施例仅用以说明本公开的技术方案而非对其限制；尽 管参照较佳实施例对本公开进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本公开的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本公开技术方案的精神，其均应涵盖在本公开请求保护的技术方案范围当中。

Claims (11)

  1. 一种混流风机，包括：
    蜗壳(1)，设有出风口(12)；
    导流锥(2)，设于所述出风口(12)处，且所述出风口(12)的气流流经所述导流锥(2)；
    所述导流锥(2)的母线包括相连的直线段(21)和曲线段(22)。
  2. 根据权利要求1所述的混流风机，其中所述导流锥(2)的母线的计算公式为：
    Figure PCTCN2022140285-appb-100001
    Figure PCTCN2022140285-appb-100002
    其中：t为自变量，且t的取值范围为(0,1)，P0为导流锥(2)的底部端点，P1为导流锥(2)的直线段(21)与曲线段(22)的连接点，P3为导流锥(2)的顶部端点，P2为曲线段(22)的弧形控制点。
  3. 根据权利要求1或2所述的混流风机，其中沿所述导流锥(2)的回转轴线方向，所述直线段(21)的所对应的高度尺寸H1与所述曲线段(22)所对应的高度尺寸H2的比值范围为0＜H1/H2＜1。
  4. 根据权利要求1至3任一项所述的混流风机，还包括内壳(3)，所述内壳(3)设置于所述蜗壳(1)内，且所述内壳(3)与所述蜗壳(1)之间形成环形流道，所述环形流道的一端构成所述出风口(12)，所述导流锥(2)设置于所述内壳(3)上。
  5. 根据权利要求4所述的混流风机，其中所述直线段(21)所对应的所述导流锥(2)的部位与所述内壳(3)相连。
  6. 根据权利要求5所述的混流风机，其中所述直线段(21)与所述内壳(3)形成所述出风口(12)的部位相切。
  7. 根据权利要求4至6任一项所述的混流风机，还包括导叶(4)，所述导叶(4)设置于所述环形流道内，所述导叶(4)的第一边沿与所述内壳(3)的外表面固定设置，所述导叶(4)的第二边沿与所述蜗壳(1)的内表面固定设置。
  8. 根据权利要求1至7任一项所述的混流风机，其中所述蜗壳(1)的外表面为曲 面。
  9. 根据权利要求1至8任一项所述的混流风机，其中所述蜗壳(1)为球台结构，所述蜗壳(1)的最大直径等于球台结构的直径。
  10. 根据权利要求9所述的混流风机，其中所述蜗壳(1)位于球台结构的两个端面处分别开设有进风口(11)和所述出风口(12)。
  11. 一种风管机，包括权利要求1至10中任一项所述的混流风机。
PCT/CN2022/140285 2022-05-27 2022-12-20 混流风机及风管机 WO2023226393A1 (zh)

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