US-20260126056-A1 - IMPELLER, FAN, AND AIR HANDLER

Abstract

An impeller, a fan, and an air handler. The impeller includes a first end plate, a second end plate, and a plurality of blades. The second end plate and the first end plate are sequentially spaced apart along an air intake direction of the impeller, and the second end plate is provided with an air inlet. The plurality of blades are spaced apart along a circumference of the impeller, the blades are connecting the first end plate and the second end plate, the first end plate includes a first plate portion and a second plate portion surrounding a periphery of the first plate portion, and the second plate portion extends obliquely in the air intake direction away from an axis of the impeller.

Inventors

• Tingting Jiang
• Cheng Qian
• Licheng ZHENG
• Di Wu
• Jiaqi Fang
• Qiqin SU

Assignees

• GUANGDONG WELLING MOTOR MANUFACTURING CO., LTD.

Dates

Publication Date

20260507

Application Date

20251229

Priority Date

20230801

Claims (15)

1. 1 . An impeller, comprising: a first end plate and a second end plate, the second end plate and the first end plate being sequentially spaced apart along an air intake direction of the impeller, the second end plate being provided with an air inlet; and a plurality of blades spaced apart along a circumference of the impeller, the plurality of blades connecting the first end plate and the second end plate, the first end plate comprising a first plate portion and a second plate portion surrounding a periphery of the first plate portion, the second plate portion extending obliquely in the air intake direction away from an axis of the impeller.
2. 2 . The impeller according to claim 1 , wherein the second end plate comprises a third plate portion and a fourth plate portion surrounding a periphery of the third plate portion, the fourth plate portion extending obliquely in the air intake direction away from the axis of the impeller.
3. 3 . The impeller according to claim 2 , wherein a first reference plane is defined to be perpendicular to the axis of the impeller, and an angle γ between the second plate portion and the first reference plane is configured to be 10°≤γ≤40°, and/or an angle δ between the fourth plate portion and the first reference plane is configured to be 10°≤δ≤40°.
4. 4 . The impeller according to claim 2 , wherein an outer diameter of the first end plate is smaller than an outer diameter of the second end plate.
5. 5 . The impeller according to claim 4 , wherein: a ratio of the outer diameter of the first end plate to the outer diameter of the second end plate is greater than or equal to 0.7; and/or in a radial direction of the air inlet, a dimension between a projection line of a blade in the plurality of blades on an axial section of the air inlet and an axis of the air inlet gradually decreases along the air intake direction.
6. 6 . The impeller according to claim 4 , wherein a blade in the plurality of blades has a first end and a second end that are sequentially distributed in the air intake direction, the second end extending outward in a radial direction of the impeller and beyond a periphery of the first end plate.
7. 7 . The impeller according to claim 6 , wherein a trailing edge of the second end extends beyond the first end plate in the air intake direction; or a trailing edge of the second end has an outwardly convex transition fillet connected to an edge of the first end plate.
8. 8 . The impeller according to claim 1 , wherein in the air intake direction, a trailing edge of a blade in the plurality of blades extends obliquely away from a rotation direction of the impeller.
9. 9 . The impeller according to claim 8 , wherein a second reference plane is defined passing through both the axis of the impeller and a center point of the trailing edge of the blade, and an angle between the trailing edge of a blade in the plurality of blades and the second reference plane is less than or equal to 45°.
10. 10 . The impeller according to claim 1 , wherein: a blade in the plurality of blades has a first end and a second end sequentially distributed in the air intake direction, and a periphery of the second end plate extends radially outward from the impeller and beyond the first end; and/or an outlet installation angle of the blade in the plurality of blades is less than 90°; and/or a surface of the first plate portion is orthogonal to the axis of the impeller.
11. 11 . A fan, comprising: a motor and the impeller according to claim 1 , a rotation shaft of the motor being provided on the first end plate of the impeller.
12. 12 . The fan according to claim 11 , further comprising: an air deflector disposed upstream of the impeller and having a cross-sectional area that gradually decreases in the air intake direction, the air deflector having a drainage end and a guide end sequentially distributed in the air intake direction, the guide end extending into the air inlet of the second end plate.
13. 13 . The fan according to claim 12 , wherein in a radial direction of the impeller, a gap d between the guide end and an edge of the air inlet is configured to be 4 mm≤d≤10 mm; and/or a depth H of the guide end extending into the air inlet is configured to be 5 mm≤H≤15 mm.
14. 14 . An air handler, comprising: the impeller according to claim 1 .
15. 15 . An air handler, comprising the fan according to claim 11 .

Description

This application is a continuation application of International (PCT) Patent Application No. PCT/CN2024/101417, filed on Jun. 25, 2024, which claims priority to Chinese Patent Application No. 202310960103.1, filed on Aug. 1, 2023, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present application relates to the technical field of fans, and in particular to an impeller, a fan, and an air handler. BACKGROUND The impeller used in centrifugal fans typically includes two end plates opposite to each other and multiple blades located between the two end plates. The end plates are usually flat, which may result in significant flow losses and turning losses when the airflow enters the impeller, thus leading to low efficiency of the centrifugal fan. SUMMARY An objective of the present application is to provide an impeller designed to improve its efficiency. The present application provides an impeller, including: a first end plate and a second end plate, the second end plate and the first end plate being sequentially spaced apart along an air intake direction of the impeller, the second end plate being provided with an air inlet; anda plurality of blades spaced apart along a circumference of the impeller, the blades connecting the first end plate and the second end plate, the first end plate including a first plate portion and a second plate portion surrounding a periphery of the first plate portion, the second plate portion extending obliquely in the air intake direction away from an axis of the impeller. In some embodiments, a surface of the first plate portion is orthogonal to the axis of the impeller. In some embodiments, the second end plate includes a third plate portion and a fourth plate portion surrounding a periphery of the third plate portion, the fourth plate portion extending obliquely in the air intake direction away from the axis of the impeller. In some embodiments, a first reference plane is defined to be perpendicular to the axis of the impeller, and an angle γ between the second plate portion and the first reference plane is configured to be 10°≤γ≤40°, and/or an angle δ between the fourth plate portion and the first reference plane is configured to be 10°≤δ≤40°. In some embodiments, an outer diameter of the first end plate is smaller than an outer diameter of the second end plate. In some embodiments, a ratio of the outer diameter of the first end plate to the outer diameter of the second end plate is greater than or equal to 0.7; and/or in a radial direction of the air inlet, a dimension between a projection line of the blade on an axial section of the air inlet and an axis of the air inlet gradually decreases along the air intake direction. In some embodiments, the blade has a first end and a second end that are sequentially distributed in the air intake direction, the second end extending outward in a radial direction of the impeller and beyond a periphery of the first end plate. In some embodiments, a trailing edge of the second end extends beyond the first end plate in the air intake direction; or a trailing edge of the second end has an outwardly convex transition fillet connected to an edge of the first end plate. In some embodiments, in the air intake direction, the trailing edge of the blade extends obliquely away from a rotation direction of the impeller. In some embodiments, a second reference plane is defined passing through both the axis of the impeller and a center point of the trailing edge of the blade, and an angle between the trailing edge of the blade and the second reference plane is less than or equal to 45°. In some embodiments, the blade has a first end and a second end sequentially distributed in the air intake direction, and a periphery of the second end plate extends radially outward from the impeller and beyond the first end; and/or an outlet installation angle of the blade is less than 90°; and/or The present application further provides a fan, including: a motor and the impeller as described above, a rotation shaft of the motor being provided on the first end plate of the impeller. In some embodiments, the fan further includes: an air deflector disposed upstream of the impeller and having a cross-sectional area that gradually decreases in the air intake direction, the air deflector having a drainage end and a guide end sequentially distributed in the air intake direction, the guide end extending into the air inlet of the second end plate. In some embodiments, in the radial direction of the impeller, a gap d between the guide end and an edge of the air inlet is configured to be 4 mm≤d≤10 mm; and/or a depth H of the guide end extending into the air inlet is configured to be 5 mm≤H≤15 mm. The present application further provides an air handler, including: the impeller as described above, or the fan as described above. BRIEF DESCRIPTION OF THE DRAWINGS To more clearly illustrate the technical solutions in the embodiments of the presen