WO2020143153A1 - Roue éolienne à flux transversal et climatiseur - Google Patents

Roue éolienne à flux transversal et climatiseur Download PDF

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Publication number
WO2020143153A1
WO2020143153A1 PCT/CN2019/088330 CN2019088330W WO2020143153A1 WO 2020143153 A1 WO2020143153 A1 WO 2020143153A1 CN 2019088330 W CN2019088330 W CN 2019088330W WO 2020143153 A1 WO2020143153 A1 WO 2020143153A1
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WO
WIPO (PCT)
Prior art keywords
blade
cross
line
point
flow wind
Prior art date
Application number
PCT/CN2019/088330
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English (en)
Chinese (zh)
Inventor
陈学彬
马列
张敏
周何杰
Original Assignee
广东美的制冷设备有限公司
美的集团股份有限公司
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Publication of WO2020143153A1 publication Critical patent/WO2020143153A1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • 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
    • F04D29/26—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
    • F04D29/30—Vanes

Definitions

  • This application relates to the technical field of air conditioners, in particular to a cross-flow wind wheel and air conditioners.
  • the cross flow wind wheel has the characteristics of simple structure, low noise, stable air flow, and linear increase in air volume with length. It is widely used in indoor units of air conditioners.
  • the cross-flow impeller is a cylindrical impeller structure, which is composed of a plurality of blades spaced apart in the circumferential direction.
  • the cross-flow impeller rotates so that the airflow can flow in from the blade gap on the inlet side and then flow out from the blade gap on the outlet side.
  • the airflow passes through the blade gap on the inlet side and the outlet side, that is, the airflow passes through the cross-flow rotor twice.
  • the front and rear ends of the same blade serve as the leading edge and the trailing edge, with different circumferential positions of the cross-flow rotor. change.
  • the pressure and suction surfaces of the blades of the existing cross-flow wind turbines are arc-shaped, and the thickness of the blades is about wing-shaped structures with small ends and large centers, making the leading and trailing edges of the blades It is similar to accommodate the situation where the leading and trailing edges of the blade are both the leading edge and the trailing edge.
  • the airflow state is different at different circumferential positions of the cross flow wind wheel.
  • the blade design of this wing-shaped structure is not the optimal design, which will increase the airflow resistance and cause the loss of air volume, resulting in The noise and power of the same air volume are not in the optimal state.
  • the purpose of the present application is to solve at least one of the technical problems existing in the prior art, and to provide a cross-flow wind wheel and air conditioner to reduce the resistance of air flow, thereby reducing air volume loss, power and noise.
  • a cross-flow wind turbine including a blade, and in the cross section of the blade, the intersection of the blade's wing-shaped center line with the outer and inner ends of the blade is defined as the outer endpoint A.
  • Inboard end point B the connection between the outboard end point A and the inboard end point B is defined as the chord length L;
  • the blade has the maximum thickness and is defined by the two-point DE connection line of the blade, and the tangent line D of the blade is
  • the DE connection is vertical, satisfying: 11° ⁇ DBE ⁇ 13°; the vertical connection between the D point of the blade and the AB connection is defined as a DC connection, satisfying: 58% ⁇ AC/AB ⁇ 61%.
  • the two-point MN line of the blade divides the blade section into a first section and a second section.
  • the tangent line of the M point of the blade is perpendicular to the MN line.
  • the vertical connection between the M point of the blade and the AB connection is defined as the MK connection, the area of the first section is S1, and the area of the second section is S2.
  • the blade has a minimum thickness and is defined by the two-point FG line of the blade, and the tangent of the F point of the blade is perpendicular to the FG line, satisfying: 1.8 ⁇ DE/FG ⁇ 2.2.
  • the center of the cross-flow wind wheel is defined as point O, which satisfies: 27° ⁇ OAB ⁇ 30°.
  • the diameter of the cross-flow wind wheel is d, satisfying: 13% ⁇ d/L ⁇ 15%
  • a cross-flow wind turbine including a blade, and in the cross section of the blade, the intersection of the blade's wing-shaped center line with the outer and inner ends of the blade is defined as the outer endpoint A.
  • Inboard end point B the connection between the outboard end point A and the inboard end point B is defined as the chord length L;
  • the blade has the maximum thickness and is defined by the two-point DE connection line of the blade, and the tangent line D of the blade is
  • the DE connection is vertical, satisfying: 13° ⁇ DBE ⁇ 16°; the vertical connection between the point D of the blade and the AB connection is defined as a DC connection, satisfying: 61% ⁇ AC/AB ⁇ 65%.
  • the two-point MN line of the blade divides the blade section into a first section and a second section.
  • the tangent of the M point of the blade is perpendicular to the MN line.
  • the vertical connection between the M point of the blade and the AB connection is defined as the MK connection, the area of the first section is S1, and the area of the second section is S2.
  • the blade has a minimum thickness and is defined by the two-point FG line of the blade, the tangent of the F point of the blade is perpendicular to the FG line, satisfying: 1.9 ⁇ DE/FG ⁇ 2.3.
  • the center of the cross-flow wind wheel is defined as point O, which satisfies: 26° ⁇ OAB ⁇ 28.5°.
  • the diameter of the cross flow wind wheel is d, satisfying: 13% ⁇ d/L ⁇ 15%.
  • a cross-flow wind turbine including a blade, and in the cross section of the blade, the intersection of the blade's wing-shaped center line with the outer and inner ends of the blade is defined as the outer endpoint A.
  • Inboard end point B the connection between the outboard end point A and the inboard end point B is defined as the chord length L;
  • the blade has the maximum thickness and is defined by the two-point DE connection line of the blade, and the tangent line D of the blade is
  • the DE connection is vertical, satisfying: 16° ⁇ DBE ⁇ 23°; the vertical connection between the point D of the blade and the AB connection is defined as a DC connection, satisfying: 65% ⁇ AC/AB ⁇ 75%.
  • the two-point MN line of the blade divides the blade section into a first section and a second section.
  • the tangent line of the M point of the blade is perpendicular to the MN line.
  • the vertical connection between the M point of the blade and the AB connection is defined as the MK connection, the area of the first section is S1, and the area of the second section is S2.
  • the blade has a minimum thickness and is defined by the two-point FG line of the blade, and the tangent of the F point of the blade is perpendicular to the FG line, satisfying: 1.8 ⁇ DE/FG ⁇ 2.2.
  • the center of the cross-flow wind wheel is defined as point O, which satisfies: 26.5° ⁇ OAB ⁇ 29°.
  • the diameter of the cross-flow wind wheel is d, which satisfies: 11% ⁇ d/L ⁇ 14%.
  • a cross-flow wind turbine including a blade, and in the cross section of the blade, the intersection of the blade's wing-shaped center line with the outer and inner ends of the blade is defined as the outer endpoint A.
  • Inboard end point B the connection between the outboard end point A and the inboard end point B is defined as the chord length L;
  • the blade has the maximum thickness and is defined by the two-point DE connection line of the blade, and the tangent line D of the blade is
  • the DE connection is vertical, satisfying: 23° ⁇ DBE ⁇ 31°; the vertical connection between the D point of the blade and the AB connection is defined as a DC connection, satisfying: 75% ⁇ AC/AB ⁇ 85%.
  • the two-point MN line of the blade divides the blade section into a first section and a second section.
  • the tangent line of the M point of the blade is perpendicular to the MN line, so
  • the vertical connection between the M point of the blade and the AB connection is defined as the MK connection
  • the area of the first section is S1
  • the area of the second section is S2.
  • the blade has a minimum thickness and is defined by the two-point FG line of the blade, and the tangent of the F point of the blade is perpendicular to the FG line, satisfying: 2 ⁇ DE/FG ⁇ 2.5.
  • the center of the cross-flow wind wheel is defined as point O, which satisfies: 26.5° ⁇ OAB ⁇ 29°.
  • the diameter of the cross-flow wind wheel is d, which satisfies: 11% ⁇ d/L ⁇ 14%.
  • an air conditioner including the cross-flow wind turbine according to the first, second, third or fourth aspect of the present application.
  • FIG. 1 is a schematic structural view of a cross-flow wind wheel in the prior art
  • FIG. 2 is a schematic diagram of the structure of blades in a cross-flow wind wheel in the prior art
  • Embodiment 3 is a schematic structural diagram of Embodiment 1 of a cross-flow wind turbine of the present application;
  • FIG. 4 is a schematic view of the blade structure of the blade in the first embodiment of the cross-flow wind turbine of the present application;
  • FIG. 5 is a schematic diagram of blade cross-sectional division in Embodiment 1 of a cross-flow wind turbine of the present application;
  • FIG. 6 is a graph showing the relationship between the rotation speed and the air volume in the first embodiment of the cross-flow wind turbine of the present application
  • FIG. 7 is a graph showing the relationship between the air volume and power in the first embodiment of the cross-flow wind turbine of the present application.
  • FIG. 8 is a graph showing the relationship between stroke volume and noise in the first embodiment of the cross-flow wind turbine of the present application.
  • Embodiment 9 is a schematic structural diagram of Embodiment 2 of a cross-flow wind turbine of the present application.
  • FIG. 10 is a schematic diagram of the blade structure of the blade in the second embodiment of the cross-flow wind turbine of the present application.
  • FIG. 11 is a schematic diagram of blade cross-sectional division in the second embodiment of the cross-flow wind turbine of the present application.
  • FIG. 13 is a graph showing the relationship between the air volume and power in the second embodiment of the cross-flow wind turbine of the present application.
  • Embodiment 15 is a schematic structural diagram of Embodiment 3 of a cross-flow wind turbine of the present application.
  • 16 is a schematic view of the blade structure of the third embodiment of the cross-flow wind turbine of the present application.
  • FIG. 17 is a schematic diagram of the sectional division of blades in the third embodiment of the cross-flow wind turbine of the present application.
  • 19 is a graph showing the relationship between the air volume and power in the third embodiment of the cross-flow wind turbine of the present application.
  • FIG. 21 is a schematic structural diagram of Embodiment 4 of a cross-flow wind turbine of the present application.
  • FIG. 22 is a schematic view of the blade structure of the fourth embodiment of the cross-flow wind turbine of the present application.
  • FIG. 23 is a schematic diagram of blade cross-section division of the fourth embodiment of the cross-flow wind turbine of the present application.
  • 24 is a graph showing the relationship between the rotation speed and the air volume in the fourth embodiment of the cross-flow wind turbine of the present application.
  • 25 is a graph showing the relationship between the air volume and power in the fourth embodiment of the cross-flow wind turbine of the present application.
  • FIG. 26 is a graph showing the relationship between air volume and noise in the fourth embodiment of the cross-flow wind turbine of the present application.
  • orientation is involved, for example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, only In order to facilitate the description of the application and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the application.
  • Embodiment 1 of the present application provides a cross-flow wind wheel and an air conditioner.
  • the cross-flow wind wheel is provided inside an air conditioner (not shown) to provide heat exchange airflow for a heat exchanger inside the air conditioner.
  • the wind impeller includes two oppositely disposed end plates and a cylindrical impeller disposed between the two end plates.
  • the cylindrical impeller is composed of a plurality of blades 10 arranged in an arc shape at intervals in the circumferential direction, and adjacent blades 10 have
  • the gap 20 for the inflow and outflow of airflow is driven by the drive motor to rotate the crossflow fan, so that the airflow can flow from the gap 20 located on the side of the airflow inlet (above the crossflow wheel) into the interior of the crossflow wheel, forming a flow vortex, and then from the airflow
  • the blade gap 20 on the outlet side (below the cross-flow rotor) flows out.
  • FIG. 4 shows a cross section of the blade profile of the cross flow wind turbine of the present application.
  • the intersection of the airfoil center line of the blade 10 and the outer and inner ends of the blade is defined as the outer end point A and the inner end point B.
  • the wing-shaped center line is a well-known term in the technical field.
  • the wing-shaped blade is composed of a series of continuous inscribed circles that are tangent to the arc surfaces on both sides, and the center of each inscribed circle is connected to form the wing-shaped center line, which can be understood Yes, the center line of the wing is a virtual line segment.
  • the direction of the cross flow wind wheel toward the center of rotation is inward, that is, the inside direction, and the direction away from the center of rotation is outward, that is, the outside direction.
  • the outer end and the inner end of the blade are arcs, which respectively intersect the midline of the airfoil, and naturally form two endpoints, namely an outer endpoint A, an inner endpoint B, an outer endpoint A, and an inner endpoint B
  • the two-point line is defined as the chord length L of the blade 10.
  • the blade 10 has a concave arc line 11 and a convex arc line 12, the blade 10 has a point D on the concave arc line 11 and an E point on the convex arc line 12, due to the thickness of the blade 10 It is variable.
  • the maximum thickness of the blade 10 exists.
  • the maximum thickness is defined by the DE two-point line. Specifically, there is a tangent to the concave arc line 11 through the point D, which is perpendicular to the DE line.
  • the maximum length of the DE line is the maximum thickness of the blade 10.
  • the blade 10 also has a minimum thickness.
  • the minimum thickness is defined by the FG two-point line. After the F point, there is a tangent to the concave arc line 11 that is perpendicular to the FG line.
  • the resistance of the air flow is small, and the separation of the air flow on the suction surface can also be delayed , Enhance the function of the blades and increase the air volume; At the same time, because the airflow delays the separation on the suction surface, it can reduce the number of shed vortices, thereby reducing power loss and reducing aerodynamic noise.
  • the concave arc line 11 and the convex arc line 12 respectively have M points and N points, and the MN two-point line divides the blade section into the first section and the first section.
  • there is a tangent to the concave arc line 11 passing through the point M which is perpendicular to the MN connection line.
  • the center of the cross-flow wind wheel is defined as point O, and the blades 10 are arranged at intervals along the circumferential direction.
  • the cross-flow wind wheel of the first embodiment of the present application is compared with the standard cross-flow wind wheel of the prior art.
  • the standard cross-flow wind wheel of the prior art has blades with small ends and large middle Symmetrical wing structure.
  • the cross-flow wind wheel of Example 1 of the present application increases the maximum air volume by about 7% at the same rotation speed.
  • Example 1 of the present application decreases by 3% under the same air volume.
  • the cross-flow wind wheel of Example 1 of the present application reduces noise by 1 decibel under the same air volume (high air volume) compared to the prior art cross-flow wind turbine; at the same air volume (low air volume) In the case, the noise drops by 1.5 dB.
  • a cross-flow wind wheel by optimizing the wing-shaped structure of the blade, improves the position distribution and change of the maximum thickness of the blade, and achieves the effects of reducing air volume loss, power and noise.
  • Embodiment 2 of the present application provides a cross-flow wind wheel and an air conditioner.
  • the cross-flow wind wheel is provided inside an air conditioner (not shown) to provide heat exchange airflow for a heat exchanger inside the air conditioner.
  • the wind impeller includes two oppositely disposed end plates and a cylindrical impeller disposed between the two end plates.
  • the cylindrical impeller is composed of a plurality of blades 10 arranged in an arc shape at intervals in the circumferential direction, and adjacent blades 10 have
  • the gap 20 for the inflow and outflow of airflow is driven by the drive motor to rotate the crossflow fan, so that the airflow can flow from the gap 20 located on the side of the airflow inlet (above the crossflow wheel) into the interior of the crossflow wheel, forming a flow vortex, and then from the airflow
  • the blade gap 20 on the outlet side (below the cross-flow rotor) flows out.
  • FIG. 10 shows a cross section of a blade profile of a cross flow wind turbine of the present application.
  • the intersection of the airfoil center line of the blade 10 and the outer and inner ends of the blade is defined as an outer end point A and an inner end point B.
  • the wing-shaped center line is a well-known term in the technical field.
  • the wing-shaped blade is composed of a series of continuous inscribed circles that are tangent to the arc surfaces on both sides, and the center of each inscribed circle is connected to form the wing-shaped center line, which can be understood Yes, the center line of the wing is a virtual line segment.
  • the direction of the cross flow wind wheel toward the center of rotation is inward, that is, the inside direction, and the direction away from the center of rotation is outward, that is, the outside direction.
  • the outer end and the inner end of the blade are arcs, which respectively intersect the midline of the airfoil, and naturally form two endpoints, namely an outer endpoint A, an inner endpoint B, an outer endpoint A, and an inner endpoint B
  • the two-point line is defined as the chord length L of the blade 10.
  • the blade 10 has a concave arc line 11 and a convex arc line 12, the blade 10 has a point D on the concave arc line 11 and an E point on the convex arc line 12, due to the thickness of the blade 10 It is variable.
  • the maximum thickness of the blade 10 exists.
  • the maximum thickness is defined by the DE two-point line. Specifically, there is a tangent to the concave arc line 11 through the point D, which is perpendicular to the DE line.
  • the maximum length of the DE line is the maximum thickness of the blade 10.
  • the blade 10 also has a minimum thickness.
  • the minimum thickness is defined by the FG two-point line. After the F point, there is a tangent to the concave arc line 11 that is perpendicular to the FG line.
  • the resistance of the air flow is small, and the separation of the air flow on the suction surface can also be delayed , Enhance the function of the blades and increase the air volume; At the same time, because the airflow delays the separation on the suction surface, it can reduce the number of shed vortices, thereby reducing power loss and reducing aerodynamic noise.
  • the concave arc line 11 and the convex arc line 12 respectively have M points and N points, and the MN two-point line divides the blade section into the first section and the first section.
  • Two sections with two sections the area of the first section is S1, and the area of the second section is S2.
  • there is a tangent to the concave arc line 11 passing through the point M which is perpendicular to the MN connection line.
  • K points on the line and MK two points on the line making the MK line perpendicular to the AB line.
  • the center of the cross-flow wind wheel is defined as point O, and the blades 10 are arranged at intervals along the circumferential direction.
  • the cross-flow wind wheel of the second embodiment of the present application is compared with the standard cross-flow wind wheel of the prior art.
  • the standard cross-flow wind wheel of the prior art has blades with small ends and large middle Symmetrical wing structure.
  • the cross-flow wind wheel of Example 2 of the present application increases the maximum air volume by about 5.9% at the same speed.
  • the cross-flow wind wheel of Example 2 of the present application reduces noise by 1 decibel under the same air volume (high air volume) compared with the prior art cross-flow wind turbine; at the same air volume (low air volume) In this case, the noise drops by 1.2 dB.
  • the cross-flow wind wheel by optimizing the blade wing structure, improves the position distribution and change of the maximum thickness of the blade, and achieves the effects of reducing air volume loss, power and noise.
  • Embodiment 3 of the present application provides a cross-flow wind wheel and an air conditioner.
  • the cross-flow wind wheel is provided inside an air conditioner (not shown) to provide heat exchange airflow for a heat exchanger inside the air conditioner.
  • the wind impeller includes two oppositely disposed end plates and a cylindrical impeller disposed between the two end plates.
  • the cylindrical impeller is composed of a plurality of blades 10 arranged in an arc shape at intervals in the circumferential direction, and adjacent blades 10 have
  • the gap 20 for the inflow and outflow of airflow is driven by the drive motor to rotate the crossflow fan, so that the airflow can flow from the gap 20 located on the side of the airflow inlet (above the crossflow wheel) into the interior of the crossflow wheel, forming a flow vortex, and then from the airflow
  • the blade gap 20 on the outlet side (below the cross-flow rotor) flows out.
  • FIG. 16 shows a cross section of the blade profile of the cross flow wind turbine of the present application.
  • the intersection of the wing-shaped center line of the blade 10 and the outer and inner ends of the blade is defined as the outer end point A and the inner end point B.
  • the wing-shaped center line is a well-known term in the technical field.
  • the wing-shaped blade is composed of a series of continuous inscribed circles that are tangent to the arc surfaces on both sides, and the center of each inscribed circle is connected to form the wing-shaped center line, which can be understood Yes, the center line of the wing is a virtual line segment.
  • the direction of the cross flow wind wheel toward the center of rotation is inward, that is, the inside direction, and the direction away from the center of rotation is outward, that is, the outside direction.
  • the outer end and the inner end of the blade are arcs, which respectively intersect the midline of the airfoil, and naturally form two endpoints, namely an outer endpoint A, an inner endpoint B, an outer endpoint A, and an inner endpoint B
  • the two-point line is defined as the chord length L of the blade 10.
  • the blade 10 has a concave arc line 11 and a convex arc line 12, the blade 10 has a point D on the concave arc line 11 and an E point on the convex arc line 12, due to the thickness of the blade 10 It is variable.
  • the maximum thickness of the blade 10 exists.
  • the maximum thickness is defined by the DE two-point line. Specifically, there is a tangent to the concave arc line 11 through the point D, which is perpendicular to the DE line.
  • the maximum length of the DE line is the maximum thickness of the blade 10.
  • the blade 10 also has a minimum thickness.
  • the minimum thickness is defined by the FG two-point line. After the F point, there is a tangent to the concave arc line 11 that is perpendicular to the FG line.
  • the resistance of the air flow is small, and the separation of the air flow on the suction surface can also be delayed , Enhance the function of the blades and increase the air volume; At the same time, because the airflow delays the separation on the suction surface, it can reduce the number of shed vortices, thereby reducing power loss and reducing aerodynamic noise.
  • the concave arc line 11 and the convex arc line 12 respectively have M points and N points, and the MN two-point line divides the blade section into the first section and the first section.
  • there is a tangent to the concave arc line 11 passing through the point M which is perpendicular to the MN connection line.
  • the center of the cross-flow wind wheel is defined as point O, and the blades 10 are arranged at intervals along the circumferential direction.
  • the cross-flow wind turbine of the third embodiment of the present application is compared with the standard cross-flow wind turbine of the prior art.
  • the standard cross-flow wind turbine of the prior art has blades with small ends and large middle Symmetrical wing structure.
  • the cross-flow wind wheel of Example 3 of the present application increases the maximum air volume by about 5.9% at the same speed.
  • the cross-flow wind wheel of Example 3 of the present application reduces noise by 0.8 decibels under the same air volume (high air volume).
  • the cross-flow wind wheel optimizes the wing-shaped structure of the blade, improves the position distribution and change of the maximum thickness of the blade, and achieves the effects of reducing air volume loss, power and noise.
  • Embodiment 4 of the present application provides a cross-flow wind wheel and an air conditioner.
  • the cross-flow wind wheel is provided inside an air conditioner (not shown) to provide heat exchange airflow for a heat exchanger inside the air conditioner.
  • the wind impeller includes two oppositely disposed end plates and a cylindrical impeller disposed between the two end plates.
  • the cylindrical impeller is composed of a plurality of blades 10 arranged in an arc shape at intervals in the circumferential direction, and adjacent blades 10 have
  • the gap 20 for the inflow and outflow of airflow is driven by the drive motor to rotate the crossflow fan, so that the airflow can flow from the gap 20 located on the side of the airflow inlet (above the crossflow wheel) into the interior of the crossflow wheel, forming a flow vortex, and then from the airflow
  • the blade gap 20 on the outlet side (below the cross-flow rotor) flows out.
  • FIG. 22 shows a cross section of a blade profile of a cross flow wind turbine of the present application.
  • the intersection of the wing-shaped center line of the blade 10 and the outer and inner ends of the blade is defined as an outer end point A and an inner end point B.
  • the wing-shaped center line is a well-known term in the technical field.
  • the wing-shaped blade is composed of a series of continuous inscribed circles that are tangent to the arc surfaces on both sides, and the center of each inscribed circle is connected to form the wing-shaped center line, which can be understood Yes, the center line of the wing is a virtual line segment.
  • the direction of the cross flow wind wheel toward the center of rotation is inward, that is, the inside direction, and the direction away from the center of rotation is outward, that is, the outside direction.
  • the outer end and the inner end of the blade are arcs, which respectively intersect the midline of the airfoil, and naturally form two endpoints, namely an outer endpoint A, an inner endpoint B, an outer endpoint A, and an inner endpoint B
  • the two-point line is defined as the chord length L of the blade 10.
  • the blade 10 also has a minimum thickness.
  • the minimum thickness is defined by the FG two-point line. After the F point, there is a tangent to the concave arc line 11 that is perpendicular to the FG line.
  • the resistance of the air flow is small, and the separation of the air flow on the suction surface can also be delayed , Enhance the function of the blades and increase the air volume; At the same time, because the airflow delays the separation on the suction surface, it can reduce the number of shed vortices, thereby reducing power loss and reducing aerodynamic noise.
  • the concave arc line 11 and the convex arc line 12 respectively have M points and N points, and the MN two-point line divides the blade section into the first section and the first section.
  • there is a tangent to the concave arc line 11 passing through the point M which is perpendicular to the MN connection line.
  • the center of the cross-flow wind wheel is defined as point O, and the blades 10 are arranged at intervals along the circumferential direction.
  • the cross-flow wind wheel of the fourth embodiment of the present application is compared with the standard cross-flow wind wheel of the prior art.
  • the standard cross-flow wind wheel of the prior art has blades with small ends and large middle Symmetrical wing structure.
  • the cross-flow wind wheel of Example 4 of the present application increases the maximum air volume by about 7.6% at the same speed.
  • the cross-flow wind wheel of Example 4 of the present application reduces noise by 1.6 decibels under the same air volume (high air volume).
  • the cross-flow wind wheel optimizes the airfoil structure of the blade, improves the position distribution and change of the maximum thickness of the blade, and achieves the effects of reducing air volume loss, power, and noise.

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  • Wind Motors (AREA)

Abstract

L'invention concerne une roue éolienne à flux transversal et un climatiseur, la roue éolienne à flux transversal comprenant une pale (10). Dans la section transversale de la pale, les points d'intersection de la ligne centrale en forme d'aile de la pale (10) et l'extrémité côté extérieur et l'extrémité côté intérieur de la pale (10) sont définis comme étant un point d'extrémité côté extérieur A et un point d'extrémité côté intérieur B. La ligne de liaison du point d'extrémité côté extérieur A et du point d'extrémité côté intérieur B est définie comme la longueur de corde L. La pale (10) a l'épaisseur maximale et est limitée par une ligne de liaison de deux points DE de la pale (10). La ligne tangente du point D de la pale (10) est verticale par rapport à la ligne de liaison DE. La ligne de liaison verticale du point D de la pale (10) et de la ligne de liaison AB est définie comme une ligne de liaison DC, satisfaisant la condition suivante : 58 % ≤ AC/AB < 61 %. En optimisant la structure en forme d'aile de la pale et en améliorant la distribution de position et le changement de l'épaisseur maximale de la pale, il est possible de réduire efficacement la résistance à l'écoulement du flux d'air, de retarder la séparation du flux d'air et de diminuer la perte de volume d'air, la puissance et le bruit.
PCT/CN2019/088330 2019-01-08 2019-05-24 Roue éolienne à flux transversal et climatiseur WO2020143153A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08200291A (ja) * 1995-01-30 1996-08-06 Mitsubishi Electric Corp 横断流送風機の羽根車
CN101144484A (zh) * 2006-09-11 2008-03-19 广东科龙电器股份有限公司 一种贯流风扇叶轮
CN104564804A (zh) * 2013-10-22 2015-04-29 珠海格力电器股份有限公司 风轮叶片及贯流风轮及风轮叶片的设计方法
CN104728162A (zh) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 贯流风叶
CN107956739A (zh) * 2017-11-23 2018-04-24 广东美的制冷设备有限公司 贯流风轮及空调器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08200291A (ja) * 1995-01-30 1996-08-06 Mitsubishi Electric Corp 横断流送風機の羽根車
CN101144484A (zh) * 2006-09-11 2008-03-19 广东科龙电器股份有限公司 一种贯流风扇叶轮
CN104564804A (zh) * 2013-10-22 2015-04-29 珠海格力电器股份有限公司 风轮叶片及贯流风轮及风轮叶片的设计方法
CN104728162A (zh) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 贯流风叶
CN107956739A (zh) * 2017-11-23 2018-04-24 广东美的制冷设备有限公司 贯流风轮及空调器

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