Search

CN-116104800-B - Blade, impeller and ventilation equipment

CN116104800BCN 116104800 BCN116104800 BCN 116104800BCN-116104800-B

Abstract

The application relates to a blade, an impeller and ventilation equipment, wherein the blade comprises a plurality of control surfaces which are layered along the height direction of the blade, the blade comprises an arc-shaped front edge, the distance between the front edge and the central axis of the impeller is the inner diameter of the blade, and the inner diameters of the blades corresponding to the plurality of control surfaces are different. According to the impeller, the blades are designed in a changing mode along the height direction of the blades under the same hub groove structure, so that different control points are adopted at the front edges of the blades to design the front edges of the blades, and the front edges of the blades are matched with the shape of the grooves of the hub for accommodating the motor, so that the air quantity is increased, the pneumatic noise is reduced, the power consumption is reduced, and the pneumatic performance of ventilation equipment is improved.

Inventors

  • GE WENBO
  • CHEN ZHIWEI
  • LI JIANJIAN
  • WANG JIAN
  • LIU HAN
  • LIU JIAN

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20230104

Claims (8)

  1. 1. The blade is applied to an impeller of a centrifugal fan and is characterized by comprising a plurality of control surfaces which are layered along the height direction of the blade, wherein the blade comprises an arc-shaped front edge, the distance between the front edge and the central axis of the impeller is the inner diameter of the blade, and the inner diameters of the blades corresponding to the plurality of control surfaces are different; The blade comprises a bottom surface and a top surface which are oppositely arranged along the height direction of the blade, the number of layers of the control surface close to the bottom surface is smaller than that of the control surface close to the top surface, and two adjacent control surfaces are connected in a smooth transition mode; When the rotating speed of the impeller is a first rotating speed and the air quantity is a first air quantity, the first rotating speed is more than 2500 revolutions per minute (rpm), the first air quantity is more than 300m3/h, and the inner diameters of the blades corresponding to the control surfaces are valued according to the following control function: y = -0.08275 x 3 + 1.57226 x 2 - 10.37529 x + 123.87879, Wherein y represents the inner diameter of the blade, the unit is millimeter, and x represents the layer number of the control surface.
  2. 2. The blade according to claim 1, wherein when the rotation speed of the impeller is a second rotation speed and the air volume is a second air volume, the second rotation speed is smaller than the first rotation speed, the second air volume is smaller than the first air volume, the second rotation speed is 1800rpm-2500rpm, the second air volume is 200 m 3/h-300 m3/h, and the inner diameters of the blades corresponding to the control surfaces are valued according to the following control functions: y = -0.07277 x 3 + 1.30653 x 2 - 8.60253 x + 122.85758, Wherein y represents the inner diameter of the blade, the unit is millimeter, and x represents the layer number of the control surface.
  3. 3. The blade according to claim 2, wherein when the rotational speed of the impeller is a third rotational speed and the air volume is a third air volume, the third rotational speed is less than or equal to the second rotational speed, the third air volume is less than the second air volume, the third rotational speed is less than 2200rpm, the third air volume is less than 200m 3/h, and the inner diameters of the blades corresponding to the plurality of control surfaces are valued according to the following control functions: y = -0.0723 x 2 - 1.7692 x + 117.94, Wherein y represents the inner diameter of the blade, the unit is millimeter, and x represents the layer number of the control surface.
  4. 4. A blade according to any one of claims 1 to 3, wherein the number of layers of the control surface is a maximum of 11 and the value of the inner diameter of the blade is in the range of 90mm to 115mm.
  5. 5. The blade of claim 1, further comprising a trailing edge and oppositely disposed suction and pressure surfaces between the leading and trailing edges, the suction and pressure surfaces being polynomial or arcuate along a section line perpendicular to a plane of meridian.
  6. 6. The blade of claim 5, wherein the polynomial curve comprises a spline curve or a Bezier curve, and the arc curve is any one of a single arc, a tangential double arc, and an airfoil arc.
  7. 7. An impeller, comprising: a hub having a recess for receiving the motor; a chassis provided on the outer peripheral side of the hub; a front disk disposed coaxially opposite to the chassis, and At least two blades according to any one of claims 1 to 6, disposed between the chassis and the front plate and spaced apart in a circumferential direction of the groove, an inner diameter of the groove gradually decreasing in a direction from the chassis to the front plate.
  8. 8. A ventilation apparatus, comprising: the impeller of claim 7, and And the motor is arranged in the groove of the hub of the impeller.

Description

Blade, impeller and ventilation equipment Technical Field The application relates to the technical field of household appliances, in particular to a blade, an impeller and ventilation equipment. Background Impellers are common components in ventilation equipment, and the service performance of the impellers is mainly reflected in the aspects of air volume and noise control. The motor of the impeller is typically mounted on a hub, and a recess is required in the hub to accommodate the motor for insertion of the motor, wherein the diameter of the recess in the hub is correspondingly reduced in the height direction of the blades. The air flow is converged on the blade after the suction surface of the blade enters, and as the shape of the blade does not change in the height direction, the distance between the hub groove and the front edge of the blade is different, so that the aerodynamic performance of the impeller and the air flow tissue near the blade are affected, and the whole performance of the impeller is difficult to develop. Disclosure of Invention The application aims to provide a blade, an impeller and ventilation equipment, wherein the blade is matched with the shape of a groove of an impeller hub for accommodating a motor, so that the air quantity is increased, and meanwhile, the pneumatic noise is reduced. In a first aspect, an embodiment of the present application provides a blade, which is applied to an impeller, where the blade includes a plurality of control surfaces layered along a height direction of the blade, the blade includes an arcuate front edge, a distance between the front edge and a central axis of the impeller is an inner diameter of the blade, and the inner diameters of the blades corresponding to the plurality of control surfaces are different from each other. In one possible implementation manner, the blade includes a bottom surface and a top surface which are oppositely arranged along the height direction of the blade, the number of layers of the control surface close to the bottom surface is smaller than that of the control surface close to the top surface, and two adjacent control surfaces are in smooth transition connection. In one possible implementation manner, when the rotation speed of the impeller is the first rotation speed and the air quantity is the first air quantity, the inner diameters of the blades corresponding to the control surfaces are valued according to the following control function: y = -0.08275x3+ 1.57226x2- 10.37529 x+ 123.87879, wherein y represents the inner diameter of the blade and x represents the number of layers in which the control surface is located. In one possible implementation manner, when the rotation speed of the impeller is the second rotation speed and the air volume is the second air volume, and the second rotation speed is smaller than the first rotation speed and the second air volume is smaller than the first air volume, the inner diameters of the blades corresponding to the control surfaces are valued according to the following control functions: y = -0.07277x3+ 1.30653x2- 8.60253 x+ 122.85758, wherein y represents the inner diameter of the blade and x represents the number of layers in which the control surface is located. . In one possible implementation manner, when the rotation speed of the impeller is a third rotation speed and the air volume is a third air volume, and the third rotation speed is less than or equal to the second rotation speed and the third air volume is less than the second air volume, the inner diameters of the blades corresponding to the plurality of control surfaces are valued according to the following control functions: y = -0.0723x2- 1.7692 x+ 117.94, wherein y represents the inner diameter of the blade and x represents the number of layers in which the control surface is located. In one possible implementation, the number of layers of the control surface is a maximum of 11, and the vane inner diameter is in the range of 90mm-115mm. In one possible implementation, the blade further includes a trailing edge, and suction and pressure surfaces disposed opposite each other between the leading and trailing edges, the suction and pressure surfaces being polynomial or arcuate in cross-section along a plane perpendicular to the meridian plane. In one possible implementation, the polynomial curve includes a spline curve or a Bezier curve, and the arc curve is any one of a single arc, a tangent double arc, and an airfoil arc. In a second aspect, an embodiment of the present application further provides an impeller, including a hub having a groove for accommodating a motor, a chassis disposed on an outer peripheral side of the hub, a front disk disposed opposite and coaxially to the chassis, and at least two blades as described above disposed between the chassis and the front disk and spaced apart along a circumferential direction of the groove, wherein an inner diameter of the groove gradually decreases in a dire