US2020224669A1PendingUtilityA1

Fan blade structure

47
Assignee: DYNA RECHI CO LTDPriority: Jan 11, 2019Filed: Jan 11, 2019Published: Jul 16, 2020
Est. expiryJan 11, 2039(~12.4 yrs left)· nominal 20-yr term from priority
Inventors:Hsiu-Ching HungChih-Chien Hsu
F04D 29/388F05D 2240/307F04D 19/002F04D 29/384F04D 29/325F05B 2240/30F05B 2250/24
47
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A fan blade structure includes a hub, a plurality of blades and a plurality of flow-guiding units. The hub includes an end surface, a mounting surface and a surrounding side. The hub has a shaft hole located in a center of the hub. The blades are disposed around the surrounding side of the hub at intervals. Each of the blades includes a windward surface, a front edge, a rear edge, an outer edge and a connecting section. The windward surface is configured to generate airflow. The rear edge is disposed opposite to the front edge. The outer edge is connected to the front edge and the rear edge, and the connecting section is connected to the surrounding side. The flow-guiding units are formed on the outer edges of the blades, respectively. Each of the flow-guiding units is composed of a plurality of three-dimensional protrusions.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A fan blade structure, comprising:
 a hub having a shape of a hollow body, wherein the hub comprises an end surface, a mounting surface and a surrounding side, and the hub has a shaft hole located in a center of the hub;   a plurality of blades disposed around the surrounding side of the hub at intervals, wherein each of the blades comprises a windward surface, a front edge, a rear edge, an outer edge and a connecting section, the windward surface is configured to generate airflow, the front edge is first contacted with air when each of the blades is rotated, the rear edge is disposed opposite to the front edge, the outer edge is connected to the front edge and the rear edge, and the connecting section is connected to the surrounding side of the hub; and   a plurality of flow-guiding units formed on the outer edges of the blades, respectively, wherein each of the flow-guiding units is composed of a plurality of three-dimensional protrusions.   
     
     
         2 . The fan blade structure of  claim 1 , wherein each of the three-dimensional protrusions of each of the flow-guiding units has a shape of a tubercle on whale flippers. 
     
     
         3 . The fan blade structure of  claim 2 , wherein the three-dimensional protrusions of each of the flow-guiding units have a total length defined as L 2 , the outer edge of each of the blades has a length defined as L 1 , and the total length L 2  and the length L 1  satisfy the following equation:
   L2<L1. 
 
     
     
         4 . The fan blade structure of  claim 3 , wherein the three-dimensional protrusions of each of the flow-guiding units are arranged in a regular shape or an irregular shape. 
     
     
         5 . The fan blade structure of  claim 4 , wherein shapes of the three-dimensional protrusions of each of the flow-guiding units are the same, partially different or totally different, and sizes of the three-dimensional protrusions of each of the flow-guiding units are the same, partially different or totally different. 
     
     
         6 . The fan blade structure of  claim 5 , wherein the three-dimensional protrusions of each of the flow-guiding units are formed in an arc shape or a geometric shape different from the arc shape. 
     
     
         7 . The fan blade structure of  claim 1 , wherein the hub, the blades and the flow-guiding units are integrally connected to each other. 
     
     
         8 . The fan blade structure of  claim 1 , wherein each of the blades is obliquely disposed on the surrounding side of the hub.

Join the waitlist — get patent alerts

Track US2020224669A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.