US-20260126051-A1 - DIAGONAL IMPELLER, FAN AND VENTILATION DEVICE

Abstract

Provided are a diagonal impeller, a fan and a ventilation device. The diagonal impeller includes a bottom plate, a top plate and a plurality of blades. The bottom plate is configured to be connected to a motor; the top plate is provided with an air inlet; the plurality of blades are connected between the bottom plate and the top plate and are arranged around an axis of the air inlet, and air outlets are formed between the bottom plate and the top plate; in an axial direction of the air inlet, diameters of circumferences enclosed by the blades are not equal, and an outer diameter of the base plate is smaller than an outer diameter of the top plate.

Inventors

• Tingting Jiang
• Huidong HU
• Cheng Qian
• Licheng ZHENG
• Fan Yang

Assignees

• GUANGDONG WELLING MOTOR MANUFACTURING CO., LTD.

Dates

Publication Date

20260507

Application Date

20251229

Priority Date

20230801

Claims (13)

1. 1 . A diagonal impeller, comprising: a base plate connected to a drive motor; a top plate provided with an air inlet; and a plurality of blades connected between the base plate and the top plate and arranged around an axis of the air inlet, an air outlet being formed between the base plate and the top plate, wherein, in an axial direction of the air inlet, diameters of circumferences enclosed by the blades are not equal, and an outer diameter of the base plate is smaller than an outer diameter of the top plate.
2. 2 . The diagonal impeller according to claim 1 , wherein an outer diameter D1 of the top plate and an outer diameter D2 of the base plate satisfy: 0.7≤D2/D1<1.
3. 3 . The diagonal impeller according to claim 1 , wherein a surface of the base plate connected to the blades is an inclined surface, and an inclination angle γ of the inclined surface satisfies: 10°<γ<40°.
4. 4 . The diagonal impeller according to claim 1 , wherein a surface of the top plate connected to the blades is an inclined surface, and an inclination angle δ of the inclined surface satisfies: 10°<δ<50°.
5. 5 . The diagonal impeller according to claim 1 , wherein, in a radial direction of the air inlet, a dimension between a projection line of each blade on an axial section of the air inlet and the axis of the air inlet is gradually decreased along a direction from the top plate toward the base plate.
6. 6 . The diagonal impeller according to claim 5 , wherein each blade of the plurality of blades has a top edge connected to the top plate and a bottom edge connected to the base plate, and a maximum diameter D3 of a top circle enclosed by the top edges and an outer diameter D1 of the top plate satisfy: D1≥D3.
7. 7 . The diagonal impeller according to claim 6 , wherein a maximum diameter D4 of a bottom circle enclosed by the bottom edges and an outer diameter D2 of the base plate satisfy: D4≥D2.
8. 8 . The diagonal impeller according to claim 6 , wherein each of the plurality of blades has a leading edge and a trailing edge connected between the top edge and the bottom edge, and the trailing edge is located outside the leading edge and inclined toward the leading edge.
9. 9 . The diagonal impeller according to claim 8 , wherein the trailing edge is inclined with respect to the axis of the air inlet, and an angle α between the trailing edge and the axis of the air inlet satisfies: 0°≤α≤45°.
10. 10 . The diagonal impeller according to claim 8 , wherein the trailing edge comprises an inclined section and an arcuate section, the arcuate section protrudes in a direction distant from the leading edge, one end of the arcuate section is connected to the inclined section and another end of the arcuate section is connected to the bottom edge.
11. 11 . The diagonal impeller according to claim 8 , wherein the trailing edge comprises an inclined section and a toothed structure, and the toothed structure is formed on the inclined section.
12. 12 . A fan, comprising the diagonal impeller according to claim 1 .
13. 13 . A ventilation device, comprising the fan according to claim 12 .

Description

This application is a continuation application of International (PCT) Patent Application No. PCT/CN2024/101415, filed on Jun. 25, 2024, which claims priority to Chinese Patent Application No. 202310960097.X, 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 ventilation equipment, in particular to a diagonal impeller, a fan and a ventilation device. BACKGROUND At present, fans of light commercial or commercial cabinet air conditioners may mostly adopt a forward multi-blade centrifugal impeller combined with a volute fan solution. This solution may have advantages of large air volume and low noise. However, due to flow characteristics of the forward multi-blade impeller, efficiency may be low and difficult to further improve. If existing mature backward centrifugal, mixed-flow, or axial fans are adopted, efficiency may be higher than that of fans adopting the forward multi-blade centrifugal impeller. However, pressure rise capability of these two types of fans may be lower than that of the forward multi-blade impeller fan. In this case, a larger fan volume or a higher rotation speed may be required, which may lead to a higher noise risk. Therefore, while efficiency is improved, risks in assembly and noise may also be introduced. SUMMARY The present application provides a diagonal impeller, aimed at improving efficiency and reducing noise. The present application provides a diagonal impeller including: a base plate connected to a drive motor;a top plate provided with an air inlet; anda plurality of blades connected between the base plate and the top plate and arranged around an axis of the air inlet, an air outlet being formed between the base plate and the top plate. In some embodiments, an outer diameter D1 of the top plate and an outer diameter D2 of the base plate satisfy: 0.7≤D2/D1<1. In some embodiments, a surface of the base plate connected to the blades is an inclined surface, and an inclination angle γ of the inclined surface satisfies: 10°<γ<40°. In some embodiments, a surface of the top plate connected to the blades is an inclined surface, and an inclination angle δ of the inclined surface satisfies: 10°<δ<50°. In some embodiments, in a radial direction of the air inlet, a dimension between a projection line of each blade on an axial section of the air inlet and the axis of the air inlet is gradually decreased along a direction from the top plate toward the base plate. In some embodiments, each blade has a top edge connected to the top plate and a bottom edge connected to the base plate, and a maximum diameter D3 of a top circle enclosed by the top edges and the outer diameter D1 of the top plate satisfy: D1≥D3. In some embodiments, a maximum diameter D4 of a bottom circle enclosed by the bottom edges and the outer diameter D2 of the base plate satisfy: D4≥D2. In some embodiments, each of the blades has a leading edge and a trailing edge connected between the top edge and the bottom edge, and the trailing edge is located outside the leading edge and inclined toward the leading edge. In some embodiments, the trailing edge is inclined with respect to the axis of the air inlet, and an angle α between the trailing edge and the axis of the air inlet satisfies: 0°≤α≤45°. In some embodiments, the trailing edge includes an inclined section and an arcuate section, the arcuate section protrudes in a direction distant from the leading edge, one end of the arcuate section is connected to the inclined section and another end of the arcuate section is connected to the bottom edge. In some embodiments, the trailing edge includes an inclined section and a toothed structure, and the toothed structure is formed on the inclined section. The present application further provides a fan including the diagonal flow impeller as described above. The present application further provides a ventilation device including the fan as described above. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the related art, drawings used in the embodiments or in the related art will be briefly described below. FIG. 1 is a cross-sectional view of a diagonal impeller according to some embodiments of the present application. FIG. 2 is a schematic structural view of the diagonal impeller according to some embodiments of the present application. FIG. 3 is a schematic structural view of the diagonal impeller according to some embodiments of the present application. FIG. 4 is a schematic diagram of dimensions of respective structures on the diagonal impeller according to some embodiments of the present application. FIG. 5 is a schematic diagram of a trailing edge structure in FIG. 2 according to some embodiments of the present application. FIG. 6 is a schematic diagram of a trailing edge structure in FIG. 3 according to some embodiments of