Ring-shaped heat dissipating device and a manufacturing method thereof, and a heat dissipating apparatus including said ring-shaped heat dissipating device

Abstract

A ring-shaped heat dissipating device made of a continuously-bending metal sheet includes a plurality of fins arranged in a radial form to form a central passage communicating from theretop to therebottom. Each of fins has a top plate, a front side plate and a rear side plate extending downwardly from opposite edges of the top plate respectively, and a bottom plate extending from a bottom edge of the rear side plate. The front side plate of one of fins connects with the bottom plate of another fin adjacent thereto. An inner edge of the top plate of one of fins adjacent to the central passage is connected with another two inner edges of two top plate plates of two fins adjacent thereto. And an inner edge of the bottom plate is connected with another two inner edges of two bottom plates of two fins adjacent thereto.

The invention claimed is: 
     
         1 . A ring-shaped heat dissipating device being a continuously-bending metal sheet and including:
 a plurality of fins arranged in a radial form and forming a central passage communicating from theretop to therebottom, each of fins comprising:
 a top plate having two parallel edges; 
 a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate; 
 a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and 
 a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate; 
 wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto; 
 wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; each two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside; 
 wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge; 
 wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge. 
   
     
     
         2 . The ring-shaped heat dissipating device of  claim 1 , wherein the fins are further arranged in a circular shape. 
     
     
         3 . A heat dissipating apparatus comprising:
 a ring-shaped heat dissipating device defining a central passage therein; and   a heat transfer device formed in one piece and comprising a top plate which defines a hole therein, a top surface of the top plate being in contact with a bottom surface of the ring-shaped heat dissipating device, and the hole of the top plate of the heat transfer device aligning to the central passage of the ring-shaped heat dissipating device.   
     
     
         4 . The heat dissipating apparatus of  claim 3 , wherein the ring-shaped heat dissipating device is made of a continuously-bending metal sheet and includes a plurality of fins arranged in a radial from and encircling the central passage, wherein each of fins comprises:
 a top plate having two parallel edges;   a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate;   a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and   a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate;   wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto;   wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside;   wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge;   wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge.   
     
     
         5 . The heat dissipating apparatus of  claim 3 , wherein the heat transfer device further comprises an annular side plate extending downwardly from an outer edge of the top plate and inclined outwardly with respect to the top plate, an annular bottom plate extending outwardly from a bottom edge of the annular side plate, and a bending portion extending upwardly from an outer edge of the annular bottom plate. 
     
     
         6 . The heat dissipating apparatus of  claim 5 , wherein the ring-shaped heat dissipating device is made of a continuously-bending metal sheet and includes a plurality of fins arranged in a radial from and encircling the central passage, wherein each of fins comprises:
 a top plate having two parallel edges;   a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate;   a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and   a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate;   wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto;   wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside;   wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge;   wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge.   
     
     
         7 . The heat dissipating apparatus of  claim 5 , wherein the annular bottom plate of the heat transfer device is slightly inclined upwardly from inside to outside thereof. 
     
     
         8 . The heat dissipating apparatus of  claim 7 , wherein the ring-shaped heat dissipating device is made of a continuously-bending metal sheet and includes a plurality of fins arranged in a radial form and encircling the central passage, wherein each of fins comprises:
 a top plate having two parallel edges;   a front side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with one of the edges of the top plate;   a rear side plate having a top edge and a bottom edge which are parallel with each other, the top edge connecting with another one edge of the top plate; and   a bottom plate having a front edge and a rear edge which are parallel with each other, the front edge connecting with the bottom edge of the rear side plate;   wherein the bottom edge of the front side plate of each of fins connects with the rear edge of the bottom plate of another fin which is adjacent thereto;   wherein the front side plate and the rear side plate of each of fins co-define a first passage communicating from outside to inside; two adjacent fins co-define a second passage communicating from outside to inside; and each of the first passages and the second passages tapers from outside to inside;   wherein top plates of the fins are located on a same level; the top plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the top plates of the fins are connected together to form a top ring edge;   wherein bottom plates of the fins are located on a same level; the bottom plate of each of fins has an inner edge adjacent to the central passage, and inner edges of the bottom plates of the fins are connected together to form a bottom ring edge.   
     
     
         9 . A manufacturing method of a ring-shaped heat dissipating device comprising steps of
 providing a strip of metal sheet;   continuously punching the metal sheet to make the metal sheet being continuously-bending and including a plurality of top plates, a plurality of side plates and a plurality of bottom plates;   connecting two ends of the metal sheet to form a hollow cylinder, the top plates of the metal sheet facing central of the hollow cylinder and the bottom plates of the metal sheet facing outside of the hollow cylinder; and   turning the hollow cylinder inside out to form the ring-shaped heat dissipating device, wherein the top plates are turned to face top side of the ring-shaped heat dissipating device, and the bottom plates are turned to face bottom side of the ring-shaped heat dissipating device.