US-20260126052-A1 - IMPELLER WHEEL

US20260126052A1US 20260126052 A1US20260126052 A1US 20260126052A1US-20260126052-A1

Abstract

An impeller wheel includes a top ring, a bottom disc, and a plurality of fan blades. The inner edge of the top ring surrounds an air inlet. The top ring has a curved structure. The inner edge of the bottom disc surrounds an opening. The bottom disc has a curved structure. The fan blade has a front edge, a top edge, a rear edge, and a bottom edge. The top edge and the bottom edge are fixed to the top ring and the bottom disc, respectively. The top edge and the top ring define an upper connection line, and the bottom edge and the bottom disc define a lower connection line. When viewed from above, the upper and lower connection lines intersect, and a portion of the fan blade is joined with the upper and lower connection lines so as to form a contour line.

Inventors

Shun-Chen Chang
Chin-Cheng Tsao

Assignees

DELTA ELECTRONICS, INC.

Dates

Publication Date: 20260507
Application Date: 20251230
Priority Date: 20240813

Claims (15)

1 . An impeller wheel, comprising: a top ring, wherein an inner edge of the top ring surrounds an air inlet, and the top ring has a curved structure between the inner edge and an outer edge of the top ring, and the outer edge of the top ring is a circle and has a ring-shaped wall; a bottom disc, wherein an inner edge of the bottom disc surrounds an opening, and the bottom disc has a curved structure between the inner edge and an outer edge of the bottom disc; a plurality of fan blades connecting to the top ring and the bottom disc; and at least one first weight balance element located on the ring-shaped wall, wherein the first weight balance element is a rivet or a clip.
2 . The impeller wheel of claim 1 , further comprising: a second weight balance element located on the outer edge of the bottom disc.
3 . The impeller wheel of claim 2 , wherein the second weight balance element is a rivet.
4 . The impeller wheel of claim 1 , wherein the top ring and the bottom disc have a central axial line, and a distance between one end of a front edge of one of the fan blades on the top ring and the central axial line is greater than a distance between one end of the front edge on the bottom disc and the central axial line.
5 . The impeller wheel of claim 4 , wherein a distance between one end of a rear edge of one of the fan blades on the top ring and the central axial line is greater than a distance between one end of the rear edge on the bottom disc and the central axial line.
6 . The impeller wheel of claim 1 , wherein the top ring and the bottom disc have a plurality of positioning holes, a top edge and a bottom edge of each of the fan blades have a plurality of positioning protrusions, and the positioning protrusions are coupled to the positioning holes, respectively.
7 . The impeller wheel of claim 1 , wherein orthogonal projections of each of the fan blades on the bottom disc do not overlap with each other.
8 . The impeller wheel of claim 1 , wherein the fan blades are solid metal sheets.
9 . An impeller wheel, comprising: a top ring, wherein an inner edge of the top ring surrounds an air inlet, and the top ring has a curved structure between the inner edge and an outer edge of the top ring, and the outer edge of the top ring is a circle and has a ring-shaped wall; a bottom disc, wherein an inner edge of the bottom disc surrounds an opening, and the bottom disc has a curved structure between the inner edge and an outer edge of the bottom disc; and a plurality of fan blades located between the top ring and the bottom disc; and at least one first weight balance element located on the ring-shaped wall, wherein the first weight balance element is a rivet or a clip.
10 . The impeller wheel of claim 9 , further comprising: a second weight balance element located on the outer edge of the bottom disc.
11 . The impeller wheel of claim 10 , wherein the second weight balance element is a rivet.
12 . The impeller wheel of claim 9 , wherein the top ring and the bottom disc have a central axial line, a distance between one end of a front edge of one of the fan blades on the top ring and the central axial line is greater than a distance between one end of the front edge on the bottom disc and the central axial line.
13 . The impeller wheel of claim 12 wherein a distance between one end of a rear edge of one of the fan blades on the top ring and the central axial line is greater than a distance between one end of the rear edge on the bottom disc and the central axial line.
14 . The impeller wheel of claim 9 , wherein the top ring and the bottom disc have a plurality of positioning holes, a top edge and a bottom edge of each of fan blades have a plurality of positioning protrusions, and the positioning protrusions are coupled to the positioning holes, respectively.
15 . The impeller wheel of claim 9 , wherein orthogonal projections of each of the fan blades on the bottom disc do not overlap with each other.

Description

CROSS - REFERENCE TO RELATED APPLICATION This application is a continuation application of U.S. Application Serial Number 19/072,955, filed March 06, 2025, which claims priority to China Application Serial Number 202411105956.8, filed August 13, 2024, which are herein incorporated by reference in their entirety. BACKGROUND Field of Invention The present disclosure relates to an impeller wheel, and more particularly, to an impeller wheel having a three-dimensional twist feature. Description of Related Art Electronic devices usually generate heat during operation. If the heat is not removed efficiently, the electronic devices may crash easily, or in serious cases, electronic elements in the electronic devices may be burned, resulting in property damage. Conventional fan blades are arranged vertically, such as those found in centrifugal fans. A centrifugal fan operates by discharging air from a lateral air outlet after the air enters from an axial direction of the impeller. Because network communication devices such as data centers have ever-increasing heat dissipation requirements, the application of axial-flow walls has been increasingly used. An industrial fan wall may include multiple axial-flow fans, but this is insufficient to solve the high heat-generation tendency of device elements, and it is still necessary to rely on centrifugal fans having higher wind pressure to provide sufficient heat dissipation efficiency. SUMMARY According to embodiments of the present disclosure, an impeller wheel includes a top ring, a bottom disc, and a plurality of fan blades disposed between the top ring and the bottom disc. The inner edge of the top ring surrounds to form an air inlet. The top ring has a curved structure between the inner edge and the outer edge of the top ring. The inner edge of the bottom disc surrounds to form an opening. The bottom disc has a curved structure between the inner edge and the outer edge of the bottom disc. The fan blade has a front edge, a top edge, a rear edge, and a bottom edge that are connected in this order. The top edge and the bottom edge of the fan blade are fixed to the top ring and the bottom disc, respectively. The top edge and the top ring of the fan blade define an upper connection line, and the bottom edge and the bottom disc of the fan blade define a lower connection line. From the top view of the impeller wheel, the upper connection line intersects the lower connection line, and a portion of the fan blade is joined with the upper connection line and the lower connection line so as to form a contour line. In some embodiments of the present disclosure, from the top view, an angle between a tangent line of one end of the lower connection line connecting to the front edge and a tangent line of the front edge on the bottom disc is lower than 30 degrees. In some embodiments of the present disclosure, the top ring and the bottom disc have a central axial line, a first angle between a connection line that is between two ends of the front edge and the central axial line is greater than a second angle between the rear edge and the central axial line. In some embodiments of the present disclosure, the first angle is in a range from 30 to 70 degrees. In some embodiments of the present disclosure, the second angle is in a range from 30 to 60 degrees. In some embodiments of the present disclosure, the top ring and the bottom disc have a central axial line, and a distance between one end of the front edge on the top ring and the central axial line is greater than a distance between one end of the front edge on the bottom disc and the central axial line. In some embodiments of the present disclosure, a distance between one end of the rear edge on the top ring and the central axial line is greater than a distance between one end of the rear edge on the bottom disc and the central axial line. In some embodiments of the present disclosure, the top ring and the bottom disc have a plurality of positioning holes, the top edge and the bottom edge of each of the fan blades have a plurality of positioning protrusions, and the positioning protrusions are coupled to the positioning holes, respectively. In some embodiments of the present disclosure, orthogonal projections of each of the fan blades on the bottom disc do not overlap with each other. In some embodiments of the present disclosure, the outer edge of the top ring is a circle, and the outer edge of the top ring has a ring-shaped wall. In some embodiments of the present disclosure, the impeller wheel further comprises at least one weight balance element located on the ring-shaped wall and the outer edge of the bottom disc. In some embodiments of the present disclosure, the fan blades are solid metal sheets. According to embodiments of the present disclosure, an impeller wheel includes a top ring, a bottom disc, and a plurality of fan blades disposed between the top ring and the bottom disc. The inner edge of the top ring surrounds to form