WO2021147605A1 - Turbine, soufflante à flux mixte et climatiseur - Google Patents

Turbine, soufflante à flux mixte et climatiseur Download PDF

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Publication number
WO2021147605A1
WO2021147605A1 PCT/CN2020/138941 CN2020138941W WO2021147605A1 WO 2021147605 A1 WO2021147605 A1 WO 2021147605A1 CN 2020138941 W CN2020138941 W CN 2020138941W WO 2021147605 A1 WO2021147605 A1 WO 2021147605A1
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WO
WIPO (PCT)
Prior art keywords
impeller
line
end point
surface section
blade
Prior art date
Application number
PCT/CN2020/138941
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English (en)
Chinese (zh)
Inventor
谭建明
张治平
马屈杨
池晓龙
苏玉海
张碧瑶
夏凯
Original Assignee
珠海格力电器股份有限公司
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Publication of WO2021147605A1 publication Critical patent/WO2021147605A1/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
    • F04D29/26—Rotors specially for elastic fluids
    • 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
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

Definitions

  • the present disclosure relates to the technical field of electrical appliances, in particular to an impeller, a mixed flow fan and an air conditioner.
  • the air duct system is one of the components used in the air conditioner to accelerate the heat exchange of the air in the area of the air conditioner.
  • the designer selects and matches the appropriate fan according to the actual needs of the different models and specifications of the air conditioner to meet the working quality and comfort of the air conditioner.
  • the air path system of the air conditioner in the related art adopts a mixed flow fan.
  • the outlet direction of the mixed flow fan is generally inclined to a certain angle with respect to the axis, so that the airflow in the flow channel of the mixed flow fan includes partial speeds in different directions.
  • the blades of the mixed flow fan in the related art have a smooth surface, so that airflows with different directional sub-velocities will have a serious boundary separation phenomenon when passing through the surface of the blade, which will lead to the generation of eddy currents.
  • the present disclosure provides an impeller, a mixed flow fan, and an air conditioner to avoid separation of air flow.
  • the first aspect of the present disclosure provides an impeller, including:
  • the wheel cover includes an inner cavity penetrating along the axis, and the inner cavity has an air inlet end and an air outlet end that are arranged oppositely;
  • the wheel hub is arranged in the wheel cover;
  • a plurality of blades are connected between the inner surface of the wheel cover and the outer surface of the hub, and the blades are twisted blades.
  • the surface of the twisted blades includes a first surface section, a second surface section and a third surface section, and the second surface section is located at Between the first surface section and the third surface section and relative to the first surface section and the third surface section, it is recessed toward one side of the rotation direction of the impeller.
  • the first surface segment, the second surface segment, and the third surface segment are transitioned by a circular arc surface.
  • the surface of the twisted blade is curved and includes a first curved section, a second curved section, and a third curved section.
  • the blade further includes a trailing edge on one side of the air outlet, and the projection of the contour line of the trailing edge on the longitudinal projection surface is an inner concave arc, and the inner concave arc is concave toward the outer side of the blade. enter.
  • the concave arc has a first end point and a second end point, and the length of the chord line between the first end point and the second end point ranges from [10mm, 30mm].
  • the length of the chord line between the first end point and the second end point is 19 mm.
  • the inner concave arc has a first end point and a second end point, and the included angle between the tangent of the inner concave arc at the first end point and the chord line is [10°, 50°].
  • the included angle range between the tangent line of the inner concave arc line at the first end point and the chord line is 31°.
  • the inner concave arc line has a first end point and a second end point, and the included angle between the tangent line of the inner concave arc line at the second end point and the chord line is [10°, 50°].
  • the included angle between the tangent line of the inner concave arc line at the second end point and the chord line is 31.5°.
  • the blade includes a blade root connected to the outer surface of the hub and extending along the outer surface of the hub, and an outer edge of the blade opposite to the root of the blade.
  • the contour of the outer edge of the blade is projected on a longitudinal projection plane passing through the axis.
  • variable inclination curve is a first S-shaped curve.
  • the projection of the root of the blade on the longitudinal projection surface is a second S-shaped curve.
  • the blade further includes a leading edge on one side of the air inlet end, and the projection of the contour line of the leading edge on the transverse projection plane perpendicular to the axis is a concave curve.
  • the number of blades is 6-20.
  • a second aspect of the present disclosure provides a mixed flow fan including the above-mentioned impeller.
  • a third aspect of the present disclosure provides an air conditioner, including the mixed flow fan described above.
  • the impeller includes a wheel cover, a hub, and a plurality of blades.
  • the wheel cover includes an inner cavity penetrating along the axis, and the inner cavity has an air inlet and an air outlet oppositely arranged; the hub is arranged in the wheel cover
  • a plurality of blades are connected between the inner surface of the wheel cover and the outer surface of the hub, and the blades are twisted blades.
  • the surface of the twisted blades includes a first surface section, a second surface section and a third surface section, and the second surface section is located Between the first surface section and the third surface section and relative to the first surface section and the third surface section, it is recessed toward one side in the direction of rotation of the impeller.
  • the twisted blade of the present disclosure has a double-twisted structure, so that the surface of the blade extends in multiple directions, thereby effectively adapting to changes in multi-directional velocity air flow, thereby reducing the flow separation of air flow in the internal flow channel, avoiding the generation of a large number of vortices and optimizing the air flow of the entire fan Flow status.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of an impeller of an embodiment of the disclosure
  • Fig. 2 is a schematic cross-sectional structure diagram of the impeller shown in Fig. 1;
  • Fig. 3 is a partial enlarged schematic diagram of the impeller shown in Fig. 2;
  • FIG 4 is a schematic structural view of the impeller shown in Figure 1 with the wheel cover removed;
  • Fig. 5 is a schematic diagram of a three-dimensional structure of one of the blades in Fig. 4;
  • Fig. 6 is a schematic top view of the structure of the impeller shown in Fig. 1;
  • FIG. 7 is a schematic diagram of a partial enlarged structure of the impeller in FIG. 6;
  • Fig. 8 is a schematic diagram of the bottom structure of the impeller shown in Fig. 1;
  • FIG. 9 to 11 are schematic diagrams of the projection structure of another blade on the longitudinal projection plane in FIG. 4;
  • Figure 12 is a vector diagram of the velocity in the inlet flow channel of a mixed flow fan in the related art
  • FIG. 13 is a vector diagram of the velocity in the inlet flow channel of the mixed flow fan according to the embodiment of the disclosure.
  • the impeller of the embodiment of the present disclosure includes a hub 1, a wheel cover 3 and a plurality of blades 2, wherein the wheel cover 3 includes an inner cavity penetrating along an axis, and the inner cavity There are oppositely arranged air inlet and outlet ends; the hub 1 is arranged in the wheel cover 3; a plurality of blades 2 are connected between the inner surface of the wheel cover 3 and the outer surface of the hub 1.
  • the blade 2 is a twisted blade.
  • the twisted blade includes three surface segments from the air inlet end to the air outlet end.
  • the three curved surface segments are a first surface segment, a second surface segment, and a third surface segment.
  • the second surface segment is located in the first surface segment and the third surface segment.
  • the twisted blade in the embodiment of the present disclosure has a double-twisted structure, so that the surface of the blade extends in multiple directions, thereby effectively adapting to the change of the multi-directional velocity air flow, thereby reducing the flow separation of the air flow in the internal flow channel, and avoiding the generation of a large number of vortices. Optimize the air flow of the entire fan.
  • the transition between the first surface section, the second surface section and the third surface section of this embodiment is made through a circular arc surface, so that the airflow of this embodiment does not change its speed direction suddenly when flowing along the wall surface, thereby further reducing the eddy current. produce.
  • each surface segment of the twisted blade in this embodiment is a curved surface segment, which is a first curved surface segment 2A, a second curved surface segment 2B, and a third curved surface segment 2C, respectively. Setting each surface segment as a curved surface segment makes the surface of the twisted blade of this embodiment more adaptable to airflow with multiple speed directions.
  • the blade 2 of this embodiment further includes a trailing edge 23 on the side of the air outlet.
  • the projection of the trailing edge 23 on the longitudinal projection surface is a concave arc.
  • the inner concave arc line is concave toward the outside of the blade.
  • the outer side of the blade here refers to the side away from the blade body.
  • the approximate shape of the trailing edge 23 of the blade 2 is a concave surface to adapt to the airflow in different speed directions so as to avoid the formation of vortex when the airflow is discharged.
  • the two end points of the concave arc are the first end point C and the second end point D, and the length range of the chord line CD is [10mm, 30mm].
  • the range of the included angle e between the tangent line of the inner concave arc at the first end point C and the chord line is [10°, 50°].
  • the included angle f between the tangent of the inner concave arc at the second end point D and the chord line is [10°, 50°].
  • the length of the chord line CD of this embodiment is 19 mm
  • the angle e between the tangent line of the inner concave arc at the first end point C and the chord line is 31°
  • the inner concave arc is 31.5°.
  • the blade 2 includes a blade root 24 connected to the outer surface of the hub 1 and extending along the outer surface of the hub 1 and a blade outer edge 22 opposite to the blade root 24.
  • the projection of the contour line of the outer edge 22 of the blade on the longitudinal projection plane passing through the axis L is a variable inclination curve, and the angle between the tangent of the variable inclination curve and the longitudinal reference line gradually increases in the direction from the inlet end to the outlet end. Big.
  • the projection of the outer edge 22 of the blade on the longitudinal projection surface of the embodiment of the present disclosure is a variable pitch curve, and the angle between the tangent of the variable pitch curve and the longitudinal reference line gradually increases, so that the airflow in the flow channel of the blade of the present embodiment is gradually increased. Guide to avoid large pressure gradients and reduce flow losses.
  • the transverse projection plane of the embodiment of the present disclosure is perpendicular to the axis L of the impeller.
  • the longitudinal projection plane of the embodiment of the present disclosure needs to pass through the axis L of the impeller.
  • the longitudinal projection surface refers to the longitudinal projection surface of the blade facing the direction of the axis L.
  • the longitudinal projection surface of the blade located on the front side of the hub 1 and in the middle is the longitudinal projection surface parallel to the paper surface.
  • the position of the longitudinal projection surface is different.
  • the longitudinal reference line of the embodiment of the present disclosure is located in the longitudinal projection plane and is parallel to the axis L, and the transverse reference line is perpendicular to the axis L.
  • the variable inclination curve includes a third end point B on the side of the air inlet end and a first end point C on the side of the air outlet end, wherein the variable inclination curve is at the third end point.
  • the range of the entrance angle d between the tangent line at B and the longitudinal reference line is [20°, 85°].
  • the range of the exit angle g between the tangent line of the variable inclination curve at the first end point C and the longitudinal reference line is [10°, 70°].
  • the flow loss of the airflow is the smallest.
  • the variable inclination curve is a first S-shaped curve.
  • the first S-shaped curve of this embodiment has an inflection point and includes a first curve segment and a second curve segment located on both sides of the inflection point, and the radius of curvature R1 of the first curve segment and the radius of curvature R2 of the second curve segment are different.
  • the range of the ratio between is [0.2, 5].
  • the projection of the blade root 24 on the longitudinal projection surface is a second S-shaped curve.
  • the second S-shaped curve includes a fourth end point A on the side of the air inlet end and a second end point D on the side of the air outlet end, wherein the tangent and transverse lines of the second S-shaped curve at the fourth end point A are
  • the range of the inlet angle m between the reference lines is [65°, 120°]; the range of the outlet angle n between the tangent of the second S-shaped curve at the fourth end point D and the horizontal reference line is [10° , 65°].
  • the horizontal reference line here is not an absolute horizontal reference line, but is located in a longitudinal projection plane passing through the axis L and perpendicular to the axis L.
  • the entrance angle m between the tangent line of the second S-shaped curve at the fourth end point A and the transverse reference line is 91°
  • the tangent line of the second S-shaped curve at the second end point D and the transverse reference line is 91°.
  • the entrance angle n between the lines is 24°.
  • the blade 2 further includes a leading edge 21 located on one side of the air inlet end.
  • the projection of the contour line of the front edge 21 on the horizontal projection plane perpendicular to the axis L is a concave curve. That is to say, looking down on the impeller from above, the shape of the leading edge 21 of the blade 2 is roughly concave, so as to reduce the air intake resistance and direct impact on the blades to improve the air intake smoothness and make the fan run with high efficiency and low noise.
  • the lateral projection surface of the embodiment of the present disclosure is not an absolute lateral projection surface, but a relative lateral projection surface. No matter how the impeller is placed, the lateral projection surface is perpendicular to the axis L of the impeller.
  • the number of blades is set to 6 to 20.
  • the impeller of this embodiment includes a hub 1, a wheel cover 3 and a plurality of blades 2; among them.
  • the wheel cover 3 has an inner cavity penetrating along the axis, and the inner cavity has an air inlet end and an air outlet end respectively located at two ends. Among them, the air inlet end is located on the upper side, and the air outlet end is located on the lower side.
  • the outer surface of the hub 1 is substantially tapered.
  • the wheel cover 3 is coaxially sleeved on the outer side of the wheel hub 1.
  • a plurality of blades 2 are connected between the outer surface of the hub 1 and the inner surface of the wheel cover 3.
  • each blade 2 includes a leading edge 21 on the side of the air inlet end, a trailing edge 23 on the side of the air outlet end, and a blade connected to the outer surface of the hub 1 and extending along the outer surface of the hub 1.
  • the leading edge 21 of this embodiment has a first intersection E that intersects the hub 1 and a second intersection F that intersects the wheel cover 3.
  • the leading edge 21 It is a concave curve connecting the first intersection E and the second intersection F.
  • the projection of the contour line of the front edge 21 in the transverse projection plane perpendicular to the axis L is a concave curve.
  • the projection of the blades 21 of the impeller in this embodiment on the transverse projection plane is a concave curve to reduce the air intake resistance and the direct impact of the air flow on the blades to optimize the air intake conditions, which is helpful for the fan to operate with high efficiency and low noise.
  • the direction of the concave curve is consistent with the direction of rotation of the impeller. Specifically, as shown in Fig. 7, the impeller of this embodiment rotates counterclockwise. Such a setting can further improve the fluency of air intake.
  • the concave curve of this embodiment includes a leaf-shaped line.
  • the following equation can be used to obtain the leaf profile trajectory.
  • k is the parameter used to adjust the chord length of the concave curve
  • the value range of t is (0,1)
  • m 1 , n 1 , n 2 are used to adjust The degree of curvature of the concave curve.
  • the range of the included angle a between the tangent of the concave curve at the first intersection E and the tangent of the contour line of the hub 1 at the first intersection E is [20 °, 150°], preferably, the included angle a is 70°.
  • the range of the included angle b between the tangent of the concave curve at the second intersection F and the tangent of the wheel cover 3 at the second intersection F is [20°, 150°], preferably, the included angle b is 78.5°.
  • the distance between the projection of the maximum bending point O of the concave curve on the chord line connecting the first intersection E and the second intersection F and the first intersection A is 20%-85% of the chord length.
  • the maximum bending point O here refers to the point on the concave curve with the largest distance from the chord line.
  • the range of the distance c between the maximum bending line O and the chord line is [2mm, 12mm].
  • the distance c between the maximum bending line O and the chord line is 2.4 mm.
  • the projection of the front edge 21 on the longitudinal projection plane is an oblique line, and the vertical distance between the oblique line and the horizontal reference line gradually increases in the extending direction from the radial inner side to the radial outer side.
  • the lateral reference line here refers to the lateral reference line that passes through the radially inner end point of the inclined line and is perpendicular to the axis.
  • the range of the maximum vertical distance h between the inclined line and the lateral reference line is [0, 15 mm]. More preferably, h is 6.7 mm.
  • the number of blades is 6-20.
  • Figures 9 to 11 are projections of a single blade on the longitudinal projection plane.
  • the projection of the outer edge 22 of the blade 2 on the longitudinal projection surface of the present embodiment is a variable pitch arc, and the tangent of the variable pitch arc and the longitudinal reference line in the direction from the air inlet end to the air outlet end The inclination angle gradually increases.
  • the outer edge 22 of this embodiment is an S-shaped curve.
  • the variable inclination curve includes a third end point B on the side of the air inlet end and a first end point C on the side of the air outlet end, wherein the variable inclination curve is at the third end point.
  • the range of the entrance angle d between the tangent line at B and the longitudinal reference line is [20°, 85°].
  • the range of the exit angle g between the tangent line of the variable inclination curve at the first end point C and the longitudinal reference line is [10°, 70°].
  • the flow loss of the airflow is the smallest.
  • the internal flow channel of the mixed flow fan of this embodiment has a special form, so that the airflow flows in along the impeller axis L and flows out obliquely.
  • the impeller flow channel of this embodiment is roughly a flow channel curve M1M2, and the range of the included angle ⁇ between the tangent line of the flow channel curve M1M2 at the air inlet end and the longitudinal reference line is [0 , 30°], the range of the angle ⁇ between the tangent line at the air outlet end and the horizontal reference line is [0, 80°].
  • the angle ⁇ between the tangent line at the air inlet end and the longitudinal reference line of the runner curve M1M2 is 10 degrees, and the angle ⁇ between the tangent line at the air outlet end and the horizontal reference line is 40 degrees. .
  • a simulation experiment was performed on the mixed flow fan of this embodiment and compared with the simulation of the mixed flow fan before optimization.
  • the experimental data is shown in the following table.
  • the noise measurement point is 0.5m from the outlet of the fan.

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

Abstract

Turbine, soufflante à flux mixte et climatiseur. La turbine comprend un couvercle de turbine (3), un moyeu (1) et une pluralité de pales (2) ; le couvercle de turbine (3) comprend une cavité interne axialement traversante, et la cavité interne est dotée d'une extrémité d'entrée d'air et d'une extrémité de sortie d'air qui sont disposées de manière opposée ; le moyeu est disposé dans le couvercle de turbine ; la pluralité de pales sont raccordées entre une surface interne du couvercle de turbine et une surface externe du moyeu, les pales sont des pales torsadées, la surface de chaque pale torsadée comprenant une première section de surface (2A), une deuxième section de surface (2B) et une troisième section de surface (2C), et la deuxième section de surface est située entre la première section de surface et la troisième section de surface et est évidée en direction d'un côté de la turbine le long d'une direction de rotation par rapport à la première section de surface et à la troisième section de surface. Les pales torsadées présentent une structure à double torsion, et les surfaces des pales s'étendent dans une pluralité de directions, de sorte que les pales s'adaptent efficacement à un changement de flux d'air à des vitesses multidirectionnelles, une séparation d'écoulement de flux d'air dans un canal d'écoulement interne est réduite, une production d'une grande quantité de courant de Foucault est évitée, puis l'état d'écoulement de flux d'air de l'ensemble de la soufflante est optimisé.
PCT/CN2020/138941 2020-01-20 2020-12-24 Turbine, soufflante à flux mixte et climatiseur WO2021147605A1 (fr)

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CN202010063829.1A CN111441984A (zh) 2020-01-20 2020-01-20 叶轮、混流风机以及空调器
CN202010063829.1 2020-01-20

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111255738A (zh) * 2020-01-20 2020-06-09 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN111156191A (zh) * 2020-01-20 2020-05-15 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN111441984A (zh) * 2020-01-20 2020-07-24 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN114909328A (zh) * 2022-05-27 2022-08-16 珠海格力电器股份有限公司 混流风机及风管机

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CN2345758Y (zh) * 1998-05-13 1999-10-27 高歌 具有扭曲柳叶型叶片的离心泵叶轮
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CN111156191A (zh) * 2020-01-20 2020-05-15 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN111255738A (zh) * 2020-01-20 2020-06-09 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN111441984A (zh) * 2020-01-20 2020-07-24 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN211449177U (zh) * 2020-01-20 2020-09-08 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN211501072U (zh) * 2020-01-20 2020-09-15 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN211715393U (zh) * 2020-01-20 2020-10-20 珠海格力电器股份有限公司 叶轮、混流风机以及空调器

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Publication number Priority date Publication date Assignee Title
US5685696A (en) * 1994-06-10 1997-11-11 Ebara Corporation Centrifugal or mixed flow turbomachines
CN2345758Y (zh) * 1998-05-13 1999-10-27 高歌 具有扭曲柳叶型叶片的离心泵叶轮
CN1573089A (zh) * 2003-06-16 2005-02-02 株式会社东芝 轴向辐流式涡轮
CN111156191A (zh) * 2020-01-20 2020-05-15 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN111255738A (zh) * 2020-01-20 2020-06-09 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN111441984A (zh) * 2020-01-20 2020-07-24 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN211449177U (zh) * 2020-01-20 2020-09-08 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN211501072U (zh) * 2020-01-20 2020-09-15 珠海格力电器股份有限公司 叶轮、混流风机以及空调器
CN211715393U (zh) * 2020-01-20 2020-10-20 珠海格力电器股份有限公司 叶轮、混流风机以及空调器

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