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WO2025175954A1 - Impulseur, ventilateur et dispositif de traitement d'air - Google Patents

Impulseur, ventilateur et dispositif de traitement d'air

Info

Publication number
WO2025175954A1
WO2025175954A1 PCT/CN2025/070808 CN2025070808W WO2025175954A1 WO 2025175954 A1 WO2025175954 A1 WO 2025175954A1 CN 2025070808 W CN2025070808 W CN 2025070808W WO 2025175954 A1 WO2025175954 A1 WO 2025175954A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
section
end plate
axis
segment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/070808
Other languages
English (en)
Chinese (zh)
Inventor
杨帆
周仕仕
王军本
冯能文
熊克强
龚涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Welling Motor Manufacturing Co Ltd
Original Assignee
Guangdong Welling Motor Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202420347772.1U external-priority patent/CN221762260U/zh
Priority claimed from CN202410636952.6A external-priority patent/CN118375633A/zh
Application filed by Guangdong Welling Motor Manufacturing Co Ltd filed Critical Guangdong Welling Motor Manufacturing Co Ltd
Publication of WO2025175954A1 publication Critical patent/WO2025175954A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades

Definitions

  • the present application relates to the technical field of fans, and in particular to an impeller, a fan and an air handling unit.
  • One object of the present application is to provide an impeller.
  • Another object of the present application is to provide a fan comprising the aforementioned impeller.
  • Another object of the present application is to provide an air handling unit, comprising the aforementioned fan, or comprising the aforementioned impeller.
  • the impeller includes a first end plate, a second end plate and a plurality of blades spaced apart along the circumference of the impeller, the second end plate is provided with an air inlet, and the second end plate and the first end plate are spaced apart along the air inlet direction of the impeller; the blades connect the first end plate and the second end plate, the first end plate includes a first plate portion and a second plate portion arranged around the periphery of the first plate portion, the second plate portion has a non-linear shape in a cross section passing through the impeller axis, and is inclined in a direction away from the impeller axis in a direction away from the second end plate.
  • impeller according to the above embodiment of the present application may also have the following additional technical features:
  • At least one of the at least two segments has a constant angle with the impeller axis in a direction away from the impeller axis.
  • At least one of the at least two segments is in a smooth arc shape and departs from the first end plate in a direction away from the impeller axis, and an angle between the segment and the impeller axis gradually decreases.
  • two adjacent sections of the at least two sections transition smoothly; and the at least two sections transition smoothly with the first plate portion.
  • the angle a between the cross section and the impeller axis gradually decreases.
  • the cross section is a smooth curve.
  • the included angle a between the second plate portion and the impeller axis is configured to be 30° ⁇ a ⁇ 90°.
  • a radial span L of the second plate portion and an outer diameter D1 of the second end plate satisfy 10% ⁇ L/D1 ⁇ 25%.
  • the first end plate outer diameter D2 and the second end plate outer diameter D1 satisfy 50% ⁇ D2/D1 ⁇ 100%.
  • the first plate portion is opposite to the air inlet along the impeller axis, and a projection of the air inlet on the first end plate along the impeller axis falls into the first end plate.
  • a cross section of the first plate portion passing through the impeller axis is in a straight line shape and is perpendicular to the impeller axis.
  • an inner edge of the blade end is connected to the first plate portion, and an outer edge is connected to the second plate portion.
  • the impeller according to the embodiment of the second aspect of the present application includes: a second end plate, a first end plate and a plurality of blades, the second end plate is provided with an air inlet, the first end plate and the second end plate are spaced apart and arranged relative to each other; the plurality of blades are distributed at intervals along the circumference of the impeller, the blades have a blade trailing edge that faces away from the axis of the impeller, wherein the blade trailing edge includes a third section, the third section extends obliquely in a direction away from the second end plate, and the inclination direction is opposite to the rotation direction of the impeller when working.
  • impeller according to the above embodiment of the present application may also have the following additional technical features:
  • the third section extends in a direction away from the second end plate to an edge of the blade at an end close to the first end plate.
  • an angle ⁇ between the third segment and the axis is greater than or equal to 10° and less than 90°.
  • the third segment is configured as a straight line segment; or, the third segment is configured as an arc segment; or, in the direction away from the second end plate, the third segment is configured as an arc segment, and the inclination angle of the tangent of the third segment relative to the axis gradually increases.
  • the blade trailing edge further includes a fourth segment, the fourth segment is closer to the second end plate than the third segment, and an angle ⁇ is formed between the third segment and the fourth segment.
  • the fourth segment extends obliquely in a direction away from the second end plate, and has the same inclination direction as the third segment.
  • the angle ⁇ between the third segment and the fourth segment satisfies 10° ⁇ 60.
  • the fourth segment is configured as a straight line segment; or, the fourth segment is configured as an arc segment; or, the fourth segment is configured as an arc segment, and the inclination angle of the tangent of the fourth segment relative to the axis gradually increases.
  • the fourth segment extends obliquely in a direction away from the second end plate, and in an opposite direction to the inclination of the third segment; or, the fourth segment is coplanar with the axis.
  • the fourth segment and the axis have an angle ⁇ therebetween, wherein 0° ⁇ 50°.
  • the fourth section extends toward the second end plate to an edge of an end of the blade adjacent to the second end plate.
  • the height dimension of the blade is H1
  • the height dimension of the fourth section is H3, wherein 10% ⁇ H3/H1 ⁇ 75%.
  • the height dimension of the blade is H1
  • the height dimension of the third section is H2, wherein 10% ⁇ H2/H1 ⁇ 90%.
  • the first end plate includes a second plate portion, the second plate portion extends in a radially outward direction of the impeller and in a direction away from the second end plate, and the blades are connected to the second plate portion.
  • the present application also provides an air handling unit, which includes the aforementioned impeller or fan.
  • FIG1 is a schematic diagram of the cross-sectional structure of an impeller in some embodiments of the present application.
  • FIG2 is a schematic diagram of the cross-sectional structure of an impeller in some embodiments of the present application.
  • FIG3 is a partial enlarged view of area A in FIG2 .
  • FIG4 is a schematic diagram of the cross-sectional structure of an impeller in some other embodiments of the present application.
  • FIG6 is a schematic diagram of the three-dimensional structure of the impeller in some embodiments of the present application.
  • FIG7 is a schematic diagram of the three-dimensional structure of the impeller in some embodiments of the present application.
  • FIG8 is a schematic diagram of an impeller according to some embodiments of the present application (first perspective).
  • FIG9 is a schematic diagram of an impeller according to some embodiments of the present application (second perspective).
  • FIG10 is a schematic diagram of an impeller according to some embodiments of the present application (from a third perspective).
  • FIG11 is a schematic diagram of an impeller according to some other embodiments of the present application.
  • FIG12 is a schematic diagram of an impeller according to some embodiments of the present application (from a fourth perspective).
  • FIG13 is a schematic cross-sectional view of the impeller according to an embodiment of the present application.
  • FIG. 14 is a simplified cross-sectional structural diagram of an air handling unit according to some embodiments of the present application.
  • the first end plate 110 includes a first plate portion 111 and a second plate portion 112.
  • the first plate portion 111 and the second plate portion 112 are connected, and the second plate portion 112 is disposed around the periphery of the first plate portion 111.
  • the first plate portion 111 supports and secures the blades 130 to mount them on the impeller 100.
  • the second plate portion 112 has a non-linear shape, for example, a curved shape or a combination of a curved and a straight shape.
  • the second plate portion 112 tilts away from the axis of the impeller 100, away from the second end plate 120. That is, the distance between the second plate portion 112 and the second end plate 120 gradually increases as the distance away from the axis of the impeller 100 increases.
  • the non-linear shape of the second plate portion 112 allows the airflow to flow more smoothly out of the impeller 100, reducing flow disturbances and unnecessary resistance, thereby reducing flow losses.
  • the non-linear second plate portion 112 can reduce the turning angle that the airflow must undergo when flowing out of the impeller 100, reducing vortices and energy loss generated during the turning process, thereby improving the efficiency of the impeller 100.
  • non-linear second plate portion 112 can also control the flow rate, flow direction, and vortex generation of the airflow, making the airflow more stable, reducing backflow and vortices, and thus reducing energy loss and vortex loss of the airflow.
  • the dynamic effect of the airflow can be optimized while fixing the blades 130, the flow direction of the airflow can be controlled, the flow loss and turning loss of the airflow can be reduced, and the working efficiency of the impeller 100 can be improved.
  • the cross section is radially divided into at least two segments.
  • the cross section can be divided into two, three, four, or five segments.
  • the at least two segments include a first segment 113 close to the axis of the impeller 100 and a second segment 114 further away from the axis of the impeller 100. That is, the first segment 113 is closer to the axis of the impeller 100 than the second segment 114, and the second segment 114 is further away from the axis of the impeller 100 than the first segment 113.
  • the first segment 113 can be the end of the second plate portion 112 close to the axis of the impeller 100, and the second segment 114 can be the end further away from the axis of the impeller 100.
  • the angle between the first segment 113 and the axis of the impeller 100 is a1
  • the angle between the second segment 114 and the axis of the impeller 100 is a2, with the angle a1 being greater than the angle a2.
  • the first section 113 may be in the shape of a curve, a broken line, a curve, or a combination thereof.
  • the angle a1 is the angle between the straight line and the axis of the impeller 100, and this angle is greater than the maximum angle a2 between the second section 114 and the axis of the impeller 100.
  • the angle a1 is the angle between the tangent of the first section 113 at different positions and the axis of the impeller 100.
  • the angle a1 being greater than the angle a2 means that the angle between the tangent at each position of the first section 113 and the axis of the impeller 100 is greater than the angle between the second section 114 and the axis of the impeller 100.
  • the second section 114 may also be in the shape of a curve, a broken line, a curve, or a combination thereof. The angle between the second section 114 and the axis of the impeller 100 can refer to the previous description.
  • the angle a1 between the first section 113 and the axis of the impeller 100 is greater than the angle a2 between the second section 114 and the axis of the impeller 100, a relatively smooth change in the angle between the second plate portion and the impeller axis can be achieved, and a smooth transition of the airflow from the first plate portion 111 to the second plate portion 112 can be achieved.
  • the airflow will turn more smoothly when leaving the impeller 100, which can reduce the vortex and turning loss generated when the airflow turns, optimize the distribution and flow direction control of the airflow, and improve the efficiency and performance of the impeller 100.
  • At least one of the at least two sections has a gradually decreasing angle with the impeller 100 axis as it moves away from the impeller 100 axis.
  • the angle between the tangent line of at least one section and the impeller 100 axis at different locations away from the impeller 100 axis gradually decreases.
  • the first section 113 or the second section 114 described above may be configured to have a gradually decreasing angle with the impeller 100 axis.
  • the angle between one section of the cross section and the impeller 100 axis may gradually decrease as it moves away from the impeller 100 axis, or any of the two or more sections may have a gradually decreasing angle with the impeller 100 axis as it moves away from the impeller 100 axis.
  • the angle gradually decreases as it moves away from the impeller 100 axis, meaning that the angle between the airflow direction and the impeller 100 axis decreases as the distance from the impeller 100 axis increases. This facilitates a smooth change in the cross section away from the impeller axis. As the angle gradually decreases, energy loss as the airflow exits the impeller 100 is reduced, thereby improving the efficiency of the impeller 100.
  • At least one of the at least two sections maintains a constant angle with the axis of the impeller 100 in a direction away from the axis of the impeller 100.
  • one of the at least two sections may maintain a constant angle with the axis of the impeller 100 in a direction away from the axis of the impeller 100, or any of the two or more sections may maintain a constant angle with the axis of the impeller 100 in a direction away from the axis of the impeller 100.
  • At least one of the at least two sections is in a straight line shape. It is understood that at least one section is in a straight line shape, and the angle between the second plate portion 112 in a straight line shape and the axis of the impeller 100 is fixed, that is, the angle between at least one section and the axis of the impeller 100 in the direction away from the axis of the impeller 100 remains unchanged.
  • the advantage of such a setting is that in this section, the airflow can flow out of the impeller 100 in a straight line, reducing the tortuosity of the flow and the generation of vortices, and achieving smooth flow.
  • the straight line section the flow velocity and direction of the airflow change less when flowing through, which reduces flow losses and improves the efficiency of the impeller 100.
  • the angle between the direction of the airflow and the axis of the impeller 100 gradually decreases as the distance from the axis of the impeller 100 gradually increases.
  • the airflow with a smaller angle with the axis of the impeller 100 is more likely to bypass the impeller 100 and flow out, which is beneficial to reducing flow loss and turning loss.
  • adjacent segments of at least two segments transition smoothly; at least two segments transition smoothly with the first plate portion 111.
  • the second plate portion 112 transitions smoothly with the first plate portion 111, and the adjacent segments of the second plate portion 112 transition smoothly with each other.
  • This smooth transition can reduce discontinuity and turbulence in the airflow between the two segments, lowering flow resistance and improving the efficiency of the impeller 100.
  • This smooth transition can also mitigate airflow shock and disturbances, reduce vibration and noise, and improve the stability of the impeller 100.
  • this smooth transition can reduce airflow impact and stress concentration on the impeller 100 and related accessories, reducing the risk of wear and fatigue and extending the service life of the equipment.
  • the cross-section of the second plate portion 112 is a smooth curve.
  • the second plate portion 112 is generally smooth and curved in a cross-section passing through the axis of the impeller 100.
  • the smooth curve of the second plate portion 112 can reduce flow resistance, optimize airflow guidance, better guide airflow out of the impeller 100, and improve the operating efficiency and stability of the impeller 100.
  • the angle a between the second plate portion 112 and the axis of the impeller 100 is configured to be 30° ⁇ a ⁇ 90°. Specifically, the angle a between the second plate portion 112 and the axis of the impeller 100 is configured to be 30° ⁇ a ⁇ 90°. For example, the angle a between the second plate portion 112 and the axis of the impeller 100 can be configured to be 30°, 40°, 45°, 80°, 85°, 90°, etc.
  • the second plate portion 112 includes at least a first section 113 and a second section 114.
  • the angle formed between the first section 113 and the axis of the impeller 100 is a1, and the maximum angle formed between the second section 114 and the axis of the impeller 100 is a2.
  • the angle a between the second plate portion 112 and the axis of the impeller 100 is configured to be 30° ⁇ a ⁇ 90°. That is, the angle a1 between the first section 113 and the axis of the impeller 100 is configured to be 30° ⁇ a1 ⁇ 90°, and the maximum angle a2 between the second section 114 and the axis of the impeller 100 is configured to be 30° ⁇ a2 ⁇ 90°, with a2 being less than a1.
  • This configuration can provide a suitable airflow deflection angle, accelerate the airflow at the outlet, reduce backflow and turbulence near the impeller 100, help reduce vibration and noise, and improve the operating efficiency of the impeller 100.
  • the radial span L of the second plate portion 112 and the outer diameter D1 of the second end plate 120 satisfy 10% ⁇ L/D1 ⁇ 25%.
  • the radial span L of the second plate portion 112 is L
  • the outer diameter D1 of the second end plate 120 is D1.
  • the ratio of the radial span L of the second plate portion 112 to the outer diameter D1 of the second end plate 120 can be set to 10% ⁇ L/D1 ⁇ 25%.
  • the ratio of L to D1 can be set to 10%, 13%, 18%, 20%, 22%, 25%, etc.
  • the structural strength and fluid dynamic performance of the impeller 100 can be balanced.
  • the radial span L of the second plate portion 112 is too large, and the airflow turns from radial to axial when passing through the impeller 100.
  • the radial span is large, the turning loss is large, and the efficiency of the impeller 100 is low.
  • the radial span L of the second plate portion 112 is too small at the same outer diameter D1 of the second end plate 120.
  • Such a small span L may restrict the flow of air around the second plate portion 112, increasing airflow resistance and thereby reducing the efficiency of the impeller 100.
  • a second plate portion 112 with an excessively small span may result in the gaps between the blades 130 being too small to allow sufficient gas to pass through, leading to airflow obstruction and reduced airflow flow.
  • the ratio of the radial span L of the second plate portion 112 to the outer diameter D1 of the second end plate 120 can be set within a range of 14% ⁇ L/D1 ⁇ 18%.
  • the ratio of L to D1 can be set to 14%, 14.5%, 15%, 17%, 17.5%, 18%, etc.
  • This ratio range can be found by comprehensively considering the structural strength, fluid dynamics, and manufacturing cost of the impeller 100.
  • the second plate portion 112 can be appropriately sized in the radial direction, thereby improving the operating efficiency of the impeller 100 while withstanding the operating pressure of the impeller 100.
  • the selection of the above ratio range is based on engineering practice and experience.
  • the ratio of the radial span L of the second plate portion 112 to the outer diameter D1 of the second end plate 120 can also range from greater than 18% or 25% to less than 14% or 10%, and this application does not impose any restrictions on this.
  • the outer diameter D2 of the first end plate 110 and the outer diameter D1 of the second end plate 120 satisfy 50% ⁇ D2 / D1 ⁇ 100%.
  • the outer diameter of the first end plate 110 is D2
  • the outer diameter of the second end plate 120 is D1.
  • the ratio of the outer diameter D2 of the first end plate 110 to the outer diameter D1 of the second end plate 120 can be set to 50% ⁇ D2 / D1 ⁇ 100%.
  • the ratio of D2 to D1 can be set to 50%, 55%, 60%, 80%, 95%, 100%, etc.
  • an appropriate radial gap can be ensured between the first end plate 110 and the second end plate 120 to accommodate airflow and avoid excessive resistance.
  • the ratio of D2 to D1 is too large, the radial gap between the first end plate 110 and surrounding components is too large, resulting in airflow leakage or flow loss. Furthermore, airflow turns from radial to axial direction as it passes through impeller 100, resulting in a large radial span and significant turning losses, leading to low efficiency of impeller 100.
  • the ratio of D2 to D1 is too small, the diameter of first end plate 110 becomes too small, narrowing the radial gaps between adjacent blades 130.
  • the outer diameter D2 of the first end plate 110 and the outer diameter D1 of the second end plate 120 can be set to 60% ⁇ D2/D1 ⁇ 70%.
  • the ratio of D2 to D1 can be set to 60%, 62%, 65%, 68%, 70%, etc.
  • this ratio range can also provide structural strength and stability of the impeller 100 and reduce the adverse effects of excessive speed and high noise.
  • the selection of the above ratio range is obtained through engineering practice and experience summary.
  • the ratio range of the outer diameter D2 of the first end plate 110 and the outer diameter D1 of the second end plate 120 can also be greater than 70% or 100%, and less than 60% or 50%. This application does not impose any restrictions on this.
  • the first plate portion 111 and the air inlet 140 are opposite to each other along the axis of the impeller 100, and the projection of the air inlet 140 on the first end plate 110 along the axis of the impeller 100 falls into the first end plate 110.
  • axis C in the figures is the axis of the impeller 100
  • the first plate portion 111 is located on the first end plate 110 and surrounds the circumference of the axis of the impeller 100
  • the air inlet 140 is located on the second end plate 120 and surrounds the circumference of the axis of the impeller 100
  • the first end plate 110 and the second end plate 120 are opposite to each other along the axis of the impeller 100
  • the first plate portion 111 and the air inlet 140 are opposite to each other along the axis of the impeller 100, which can better guide the airflow from the air inlet 140 into the impeller 100.
  • the projection of the air inlet 140 on the first end plate 110 along the axis of the impeller 100 falls on the first end plate 110. It can be understood that on the projection plane perpendicular to the axis of the impeller 100, the diameter of the air inlet 140 is smaller than the diameter of the first end plate 110. Since the diameter of the air inlet 140 is small, when the air flow passes through the air inlet 140 and enters the internal space of the impeller 100 with a larger diameter, eddies or vortices may be generated. The gas moves at a higher speed in the vortex, which helps to increase the flow speed of the air flow; in addition, the diameter of the air inlet 140 is smaller than the diameter of the first end plate 110.
  • the cross-section of the first plate portion 111 passing through the axis of the impeller 100 is in a straight line shape and is perpendicular to the axis of the impeller 100.
  • the first plate portion 111 can provide stable support and positioning for the blades 130 to ensure that the blades 130 maintain the correct position and stability during operation.
  • the straight line shape of the first plate portion 111 and its perpendicularity to the axis of the impeller 100 help the blades 130 obtain stable support during operation, and can also maintain a minimum gap between the blades 130 and the first plate portion 111 to reduce airflow leakage and loss.
  • the straight line shape and vertical positioning can also ensure good symmetry between the blades 130 and the first plate portion 111, so as to further optimize the operational stability of the impeller 100.
  • the inner edge of the end of blade 130 is connected to first plate portion 111, and the outer edge is connected to second plate portion 112.
  • the end of blade 130 is connected to first end plate 110, wherein the inner edge of the end of blade 130 is connected to first plate portion 111, and the outer edge is connected to second plate portion 112.
  • the impeller 100 can be applied to a fan.
  • the impeller 100 includes: a second end plate 120, a first end plate 110 and a plurality of blades 130.
  • the second end plate 120 is provided with an air inlet 140.
  • the air inlet 140 can guide the air flow into the impeller 100.
  • the first end plate 110 and the second end plate 120 are spaced apart and arranged opposite to each other.
  • the plurality of blades 130 are distributed along the circumference of the impeller 100.
  • the blades 130 have a blade shape that is away from the axis of the impeller 100.
  • the blade trailing edge 131 specifically, in the radial direction of the impeller 100, the side of the same blade 130 close to the axis of the impeller 100 is the blade leading edge 132, and the side away from the axis of the impeller 100 is the blade trailing edge 131.
  • the blade trailing edge 131 is closer to the outer edges of the second end plate 120 and the first end plate 110 relative to the blade leading edge 132.
  • the second end plate 120 and the first end plate 110 provide support for the blade 130, thereby improving the rigidity and strength of the blade 130.
  • the blade trailing edge 131 may include a third section 1311 , and the third section 1311 extends obliquely in a direction away from the second end plate 120 , and the oblique direction is opposite to the rotation direction of the impeller 100 during operation.
  • the impeller 100 of the embodiment of the present application can be applied to a centrifugal fan. When the impeller 100 rotates, the air flow entering from the air inlet 140 is accelerated and the flow direction is changed, so that the flow direction of the gas entering from the air inlet 140 is changed from axial to radial. The flow path of the gas diverges radially and flows out from the gaps between adjacent blades 130.
  • the blade 130 corresponding to the third section 1311 is constructed with an inclined surface, which can reduce the airflow separation on the surface of the blade 130 corresponding to the third section 1311, improve the aerodynamic efficiency of the impeller 100, and thereby improve the air volume and efficiency of the fan.
  • the impeller 100 can rotate in the direction of E1 ⁇ E2 during operation, and the third section 1311 extends obliquely in the direction of E2 ⁇ E1.
  • the third section 1311 of the trailing edge 131 of the blade extends obliquely in the direction away from the second end plate 120, and the inclination direction is opposite to the rotation direction of the impeller 100 when working, so that the blade 130 is constructed with an inclined surface, which can reduce the airflow separation on the surface of the blade 130 when the impeller 100 is working, improve the aerodynamic efficiency of the impeller 100, and thereby improve the air volume and efficiency of the fan.
  • the third section 1311 can be the entire section from the blade trailing edge 131 in the extension direction from the second end plate 120 to the first end plate 110, that is, the blade trailing edge 131 as a whole is inclined and extends in the direction away from the second end plate 120, and the third section 1311 can also be one of the sections in the extension direction from the second end plate 120 to the first end plate 110.
  • the blade trailing edge 131 can also include a second section, a third section, etc., wherein the third section 1311 can be located at different positions of the blade trailing edge 131, for example, it can be located at a position of the blade trailing edge 131 close to the second end plate 120, it can also be located at a position of the blade trailing edge 131 close to the first end plate 110, or it can be located in the middle position of the blade trailing edge 131 in the axial direction.
  • the impeller 100 guides the airflow into the impeller 100 from the air inlet 140 of the second end plate 120. During the flow from the second end plate 120 to the first end plate 110, flow separation will occur.
  • the airflow separation on the surface of the blade 130 can be reduced, the aerodynamic efficiency of the impeller 100 can be improved, and the air volume and efficiency of the fan can be improved.
  • a plurality of blades 130 are arranged at intervals along the circumference of the impeller 100, and at least a portion of the blades 130 may be connected between the second end plate 120 and the first end plate 110.
  • all of the blades 130 may be connected between the second end plate 120 and the first end plate 110, or a portion of the blades 130 may be connected between the second end plate 120 and the first end plate 110.
  • the second end plate 120 and the first end plate 110 may be arranged at intervals along the air intake direction of the impeller 100, and the plurality of blades 130 are distributed at intervals along the circumference of the impeller 100, and the blades 130 are connected to the second end plate 120 and the first end plate 110.
  • the air inlet 140 on the second end plate 120 may guide the air into the impeller 100, and the first end plate 110 may provide support for the blades 130, thereby improving the rigidity and strength of the blades 130.
  • the third section 1311 extends in a direction away from the second end plate 120 to the edge of the blade 130 at one end adjacent to the first end plate 110.
  • the blade 130 may have a first end 130a and a second end 130b opposite to each other, wherein the first end 130a is adjacent to or connected to the second end plate 120, and the second end 130b is adjacent to or connected to the first end plate 110.
  • the third section 1311 extends in a direction away from the second end plate 120 to the second end 130b of the blade 130.
  • the flow separation phenomenon will increase in the direction from the second end plate 120 to the first end plate 110.
  • the third section 1311 to the edge of one end of the blade 130, that is, the blade 130 has an inclined surface opposite to the rotation direction of the impeller 100, and extends obliquely to the second end 130b of the blade 130, the flow separation of the air flow on the surface of the blade 130 near the first end plate 110 can be effectively reduced, making the air flow smoother, improving the aerodynamic efficiency of the impeller 100, and thereby improving the air volume and working efficiency of the fan.
  • the angle ⁇ between the third section 1311 and the axis of the impeller 100 is greater than or equal to 10° and less than 90°.
  • the impeller 100 axis is C, and the third section 1311 has a certain angle with the impeller axis C. This allows the blade 130 corresponding to the third section 1311 to have a suitably inclined profile, facilitating airflow guidance, reducing airflow separation on the surface of the blade 130, ensuring smooth airflow, and improving the aerodynamic efficiency of the blade 130.
  • the third segment 1311 can be a straight line segment, an arc segment, etc.
  • the angle ⁇ between the third segment 1311 and the axis can be a fixed angle.
  • the angle ⁇ between the third segment 1311 and the axis can be the angle between the tangent of the third segment 1311 and the axis. That is to say, there are multiple angles ⁇ between the third segment 1311 and the axis, and the multiple angles ⁇ all meet the requirements of being greater than or equal to 10° and less than 90°.
  • the angle ⁇ between the third section 1311 and the axis of the impeller 100 is greater than or equal to 40° and less than 72°, wherein the inclination angle of the third section 1311 is controlled within a reasonable range, and the angle between the third section 1311 and the axis of the impeller 100 is greater than or equal to 40°, which can effectively reduce the airflow separation on the surface of the blade 130, and the angle between the third section 1311 and the axis of the impeller 100 is less than 72°, thereby avoiding excessive deflection of the blade 130 resulting in poor mold opening and manufacturability, thereby facilitating the processing and forming of the blade 130 and improving manufacturability and structural stability.
  • the third section 1311 may be configured as a straight line section, which can facilitate the processing and forming of the blade 130 , improve the manufacturability of the blade 130 , and reduce mold making costs.
  • the third section 1311 is configured as an arc segment, and the corresponding blade 130 surface is also an arc surface, which can reduce the flow resistance of the airflow and improve the smoothness of the airflow.
  • the third section 1311 is configured as an arc segment in a direction away from the second end plate 120, and the inclination angle of the tangent of the third section 1311 relative to the axis gradually increases.
  • the inclination angle of the third section 1311 gradually increases, so as to further reduce the flow separation of the airflow in the process of flowing from the second end plate 120 to the first end plate 110, effectively reduce the flow separation at the position where the blade 130 is close to the first end plate 110, reduce the generation of vortices, make the airflow flow smoothly, and improve the aerodynamic efficiency of the blade 130.
  • the blade trailing edge 131 also includes a fourth section 1312, and the fourth section 1312 is closer to the second end plate 120 than the third section 1311, and there is an angle ⁇ between the third section 1311 and the fourth section 1312, which facilitates the mold opening and manufacturing of the blade 130, and the surfaces of the blade 130 corresponding to the third section 1311 and the fourth section 1312 have different airflow separation phenomena.
  • the third section 1311 and the fourth section 1312 are set at different inclination angles to improve the working efficiency of the impeller 100.
  • the fourth section 1312 is close to the second end plate 120 and extends in the direction away from the second end plate 120.
  • the fourth section 1312 can have the same inclination direction as the third section 1311, or the fourth section 1312 can have an inclination direction opposite to that of the third section 1311, or the fourth section 1312 can be coplanar with the axis.
  • the fourth section 1312 can be a non-inclined structure.
  • the fourth section 1312 extends obliquely in a direction away from the second end plate 120, and has the same inclination direction as the third section 1311. That is, the fourth section 1312 extends obliquely in a direction away from the second end plate 120, and the inclination direction is opposite to the rotation direction of the impeller 100 when working, so that the blade 130 corresponding to the fourth section 1312 is constructed with an inclined surface, which can reduce the airflow separation on the surface of the blade 130 corresponding to the first section, improve the aerodynamic efficiency of the impeller 100, and thereby improve the air volume and efficiency of the fan.
  • the angle ⁇ between the fourth section 1312 and the impeller axis C may be smaller than the angle ⁇ between the third section 1311 and the impeller axis C.
  • the inclination angle of the fourth section 1312 is smaller than the inclination angle of the third section 1311.
  • the inclination angle of the profile of the blade 130 corresponding to the third section 1311 is larger, and the inclination angle of the profile of the blade 130 corresponding to the fourth section 1312 is smaller.
  • the cooperation between the third section 1311 and the fourth section 1312 can reduce the flow separation of the airflow near the first end plate 110, thereby improving the aerodynamic efficiency of the impeller 100.
  • the fourth segment 1312 is configured as a straight segment, which can facilitate the processing and forming of the blade 130, improve the manufacturability of the blade 130 and reduce the mold opening cost.
  • the fourth section 1312 is configured as an arc segment, and the corresponding surface of the blade 130 is also an arc surface, which can reduce the resistance of the airflow and improve the smoothness of the airflow.
  • fourth segment 1312 is configured as an arc segment, and the inclination angle of the tangent line of fourth segment 1312 relative to the axis gradually increases as it moves away from second end plate 120.
  • the inclination angle of fourth segment 1312 gradually increases as it approaches first end plate 110, thereby effectively reducing flow separation during the flow from second end plate 120 to first end plate 110, reducing the generation of vortices, ensuring smooth airflow, and improving the aerodynamic efficiency of blade 130.
  • an angle ⁇ is formed between the fourth segment 1312 and the impeller axis C, where 0° ⁇ 50°. In some embodiments, 0° ⁇ 20°.
  • the inclination angle of the fourth segment 1312 is controlled within a reasonable range, thereby reducing airflow separation on the surface of the blade 130 corresponding to the third segment 1311 and preventing excessive deflection of the blade 130, which would result in poor mold opening and manufacturability. This facilitates the processing and forming of the blade 130 and improves the manufacturability and structural stability of the blade 130.
  • transition section 1313 between the third section 1311 and the fourth section 1312.
  • the third section 1311 can smoothly transition to the transition section 1313
  • the fourth section 1312 can smoothly transition to the transition section 1313
  • the third section 1311 and the fourth section 1312 can smoothly transition to the transition section 1313, which can improve the smoothness of the airflow and improve the aerodynamic efficiency of the impeller 100.
  • the third section 1311 can be a straight section to facilitate mold manufacturing of the blade 130.
  • the resistance of the airflow at the junction of the third section 1311 and the fourth section 1312 can be reduced, allowing the airflow to flow smoothly.
  • the fourth section 1312 can be a straight section to facilitate mold manufacturing of the blade 130.
  • the resistance of the airflow at the junction of the third section 1311 and the fourth section 1312 can be reduced, allowing the airflow to flow smoothly.
  • the trailing edge 131 of the blade is provided with a third section 1311, a transition section 1313 and a fourth section 1312 in sequence in the direction from the second end plate 120 to the first end plate 110, wherein the third section 1311, the transition section 1313 and the fourth section 1312 can be arranged in different forms.
  • the third section 1311 can be a straight section
  • the transition section 1313 can be an arc section
  • the fourth section 1312 can be a straight section, which is convenient for mold manufacturing of the blade 130, reduces mold manufacturing costs, and improves the manufacturability of the blade 130.
  • the transition section 1313 can be a tangent arc shape of the third section 1311 and the fourth section 1312.
  • the blade 130 can construct an inclined curved surface structure, guide the airflow, reduce the airflow separation on the surface of the blade 130, and improve the working efficiency of the impeller 100.
  • the third segment 1311 can be an arcuate segment
  • the transition segment 1313 can be an arcuate segment
  • the fourth segment 1312 can be a straight segment.
  • the third segment 1311, the fourth segment 1312, and the transition segment 1313 can all be arcuate segments.
  • the third segment 1311, the arcuate segment, and the fourth segment 1312 of the present application can also be configured in other forms, which are not listed here. Based on the above description, those skilled in the art can easily obtain other configuration forms of the present application.
  • the fourth section 1312 extends toward the second end plate 120 to an edge of the blade 130 at one end close to the second end plate 120.
  • the blade 130 may have a first end 130a and a second end 130b opposite to each other, wherein the first end 130a is close to the second end plate 120, and the second end 130b is close to the first end plate 110.
  • the fourth section 1312 extends toward the second end plate 120 to the first end 130a of the blade 130.
  • the height dimension of blade 130 in the axial direction, is H1, and the height dimension of third section 1311 is H2, where 10% ⁇ H2/H1 ⁇ 90%. In some embodiments, 15% ⁇ H2/H1 ⁇ 60%.
  • This ratio of third section 1311 in the axial direction is within a reasonable range, which can enhance the airflow separation improvement effect of blade 130 corresponding to third section 1311 and facilitate mold manufacturing of blade 130.
  • H2/H1 can be 16%, 20%, 30%, 40%, 60%, etc.
  • the height dimension of the blade 130 is H1
  • the height dimension of the fourth section 1312 is H3, where 10% ⁇ H3/H1 ⁇ 75%.
  • the inclination angle of the fourth section 1312 relative to the third section 1311 is relatively small, and the proportion of the fourth section 1312 along the axis is within a reasonable range, which can facilitate the mold manufacturing and processing of the blade 130 and facilitate the reduction of airflow separation on the surface of the blade 130 through the third section 1311.
  • H2/H1 can be 40%, 50%, 60%, 70%, etc.
  • the first end plate 110 includes a second plate portion 112, and the second plate portion 112 extends in a radially outward direction along the impeller 100, in a direction away from the second end plate 120, and the blades 130 are connected to the second plate portion 112.
  • the airflow enters the impeller 100 from the air inlet 140 of the second end plate 120, and the second end plate 120 can guide the airflow into the impeller 100.
  • the first end plate 110 can support the blades 130 and guide the airflow out of the impeller 100.
  • the resistance of the airflow during the outward flow can be reduced, so that the airflow flows outward smoothly, thereby improving the working efficiency of the impeller 100.
  • the first end plate 110 also includes a first plate portion 111, a second plate portion 112 connected to the outer periphery of the first plate portion 111, and the second plate portion 112 is arranged around the first plate portion 111, wherein the first plate portion 111 can be configured to connect to the motor, and the second plate portion 112 can be configured to connect to the blade 130.
  • the cooperation between the second plate portion 112 and the first plate portion 111 can enhance the structural strength of the first end plate 110, thereby effectively supporting the blade 130 and enhancing the structural stability of the impeller 100.
  • Another object of the present application is to provide a fan, which includes the impeller 100 described above.
  • the fan includes a motor and the impeller 100 described in any of the above embodiments, and the motor is disposed on the first end plate 110 of the impeller 100.
  • the fan includes the motor and the impeller 100, wherein the motor's rotating shaft is disposed on the first end plate 110 of the impeller 100.
  • the first end plate 110 supports the motor's rotating shaft and transmits the motor's power to the impeller 100.
  • the motor is directly connected to the impeller 100 through the first end plate 110, and the rotation of the motor's rotating shaft drives the blades 130 to rotate.
  • the structure and shape of the first end plate 110 of the impeller 100 can be improved. Under the same airflow output, the impact and turbulence between the airflow and other components can be reduced, thereby improving the working efficiency of the impeller 100 and reducing the energy consumption and noise level of the fan.
  • the fan can be a centrifugal fan.
  • airflow separation on the surface of the blades 130 is reduced, and the impeller 100 has high aerodynamic efficiency, thereby increasing the air volume and operating efficiency of the fan.
  • the fan of the embodiment of the present application can be used in equipment such as air conditioners to reduce equipment energy consumption.
  • This application also proposes an air handling unit 200, which includes the aforementioned impeller 100 or fan.
  • Figure 14 is a schematic diagram of the structure of the impeller 100 of the aforementioned embodiment installed in the air handling unit 200.
  • the air handling unit 200 heats or cools the airflow through the heat exchanger 210, and then delivers the airflow to the duct system through the impeller 100 or fan of the aforementioned embodiment.
  • the impeller 100 described in this application has an aerodynamic efficiency of 62.5%, while the impeller of the comparative solution has an aerodynamic efficiency of 61.2%.
  • the air handling unit 200 in the embodiment of the present application by applying the aforementioned impeller 100 or fan, efficient air flow transmission can be achieved, good ventilation effect can be provided, indoor temperature can be adjusted, and noise level can be controlled.
  • first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of such features.
  • plural means at least two, for example, two, three, etc., unless otherwise specifically defined.
  • the terms “mounted,” “connected,” “connect,” “fixed,” etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
  • first feature when a first feature is “above” or “below” a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

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

Abstract

Impulseur, ventilateur et dispositif de traitement d'air. L'impulseur comprend : une première plaque d'extrémité (110), une seconde plaque d'extrémité (120) et de multiples pales (130) réparties à intervalles dans le sens circonférentiel de l'impulseur (100), la seconde plaque d'extrémité (120) étant pourvue d'une entrée d'air (140), et la seconde plaque d'extrémité (120) et la première plaque d'extrémité (110) étant réparties à distance l'une de l'autre dans le sens de l'entrée d'air de l'impulseur (100). Les pales (130) sont reliées à la première plaque d'extrémité (110) et à la seconde plaque d'extrémité (120) ; la première plaque d'extrémité (110) comprend une première partie de plaque (111) et une seconde partie de plaque (112) agencée autour de la périphérie de la première partie de plaque (111) ; et la seconde partie de plaque (112) présente une forme non linéaire sur une section transversale passant à travers l'axe de l'impulseur (100), et s'incline à l'opposé de la seconde plaque d'extrémité (120) dans une direction s'éloignant de l'axe de l'impulseur (100). L'impulseur, le ventilateur et le dispositif de traitement d'air peuvent réduire la perte de flux lorsqu'un flux d'air entre dans l'impulseur, ce qui permet d'améliorer l'efficacité du ventilateur.
PCT/CN2025/070808 2024-02-23 2025-01-06 Impulseur, ventilateur et dispositif de traitement d'air Pending WO2025175954A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202420347772.1 2024-02-23
CN202420347772.1U CN221762260U (zh) 2024-02-23 2024-02-23 叶轮、风机和空气处理机
CN202410636952.6 2024-05-21
CN202410636952.6A CN118375633A (zh) 2024-05-21 2024-05-21 风机的叶轮和风机

Publications (1)

Publication Number Publication Date
WO2025175954A1 true WO2025175954A1 (fr) 2025-08-28

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Application Number Title Priority Date Filing Date
PCT/CN2025/070808 Pending WO2025175954A1 (fr) 2024-02-23 2025-01-06 Impulseur, ventilateur et dispositif de traitement d'air

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WO (1) WO2025175954A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6039539A (en) * 1995-09-07 2000-03-21 Berg; Gunnar Radial fan wheel
CN115875307A (zh) * 2022-12-22 2023-03-31 依必安派特电机(上海)有限公司 后向离心风机叶轮
CN220505390U (zh) * 2023-08-01 2024-02-20 广东威灵电机制造有限公司 斜流叶轮、风机和通风设备
CN220505389U (zh) * 2023-08-01 2024-02-20 广东威灵电机制造有限公司 叶轮、风机和空气处理机
CN118375633A (zh) * 2024-05-21 2024-07-23 广东威灵电机制造有限公司 风机的叶轮和风机
CN221762260U (zh) * 2024-02-23 2024-09-24 广东威灵电机制造有限公司 叶轮、风机和空气处理机
CN222067167U (zh) * 2024-02-23 2024-11-26 广东威灵电机制造有限公司 叶轮、风机和暖通设备

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6039539A (en) * 1995-09-07 2000-03-21 Berg; Gunnar Radial fan wheel
CN115875307A (zh) * 2022-12-22 2023-03-31 依必安派特电机(上海)有限公司 后向离心风机叶轮
CN220505390U (zh) * 2023-08-01 2024-02-20 广东威灵电机制造有限公司 斜流叶轮、风机和通风设备
CN220505389U (zh) * 2023-08-01 2024-02-20 广东威灵电机制造有限公司 叶轮、风机和空气处理机
CN221762260U (zh) * 2024-02-23 2024-09-24 广东威灵电机制造有限公司 叶轮、风机和空气处理机
CN222067167U (zh) * 2024-02-23 2024-11-26 广东威灵电机制造有限公司 叶轮、风机和暖通设备
CN118375633A (zh) * 2024-05-21 2024-07-23 广东威灵电机制造有限公司 风机的叶轮和风机

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