Heat-dissipating body having radial fin assembly and heat-dissipating device having the same

Abstract

A heat-dissipating device includes a heat-dissipating body, a vapor chamber and a fan assembly. The heat-dissipating body includes a thermal-conductive element and a radial fin assembly. The thermal-conductive element includes a solid post and extending arms extending therefrom. The radial fin assembly includes radially-arranged heat-dissipating fins that form a central hole to enclose the sold post, engaging troughs inserted by the extending arms, and an airflow space. An air channel is formed between any two heat-dissipating fins. The vapor chamber is provided at one end of the solid post, while the fan assembly is arranged on the other end and received in the airflow space to correspond to the respective air channels. Thus, the mobility of air and the heat-dissipating efficiency can be increased, thereby conforming to the requirements for compact design.

1 . A heat-dissipating body having a radial fin assembly, comprising:
 a thermal-conducting element comprising a solid post and a plurality of extending arms extending from the periphery of the solid post; and   a radial fin assembly constituted of a plurality of heat-dissipating fins radially arranged at intervals, the heat-dissipating fins forming a central hole to enclose the solid post, and a plurality of engaging troughs surrounding the central hole and inserted by the extending arms.   
     
     
         2 . The heat-dissipating body having a radial fin assembly according to  claim 1 , wherein the extending arm is formed into a trapezoid. 
     
     
         3 . The heat-dissipating body having a radial fin assembly according to  claim 2 , wherein the thermal-conductive element further comprises a plurality of heat-dissipating pieces, and the heat-dissipating pieces extend from the outer periphery of the solid post to be arranged between the extending arms respectively. 
     
     
         4 . A heat-dissipating device having a heat-dissipating body, comprising:
 a heat-dissipating body having a radial fin assembly, comprising:   a thermal-conductive element comprising a solid post and a plurality of extending arms extending from the periphery of the sold post; and   a radial fin assembly constituted of a plurality of heat-dissipating fins arranged radially at intervals, the heat-dissipating fins forming a central hole to enclose the sold post, a plurality of engaging troughs surrounding the central hole and inserted by the extending arms, and an airflow space provided over the central hole, an air channel being formed between any two heat-dissipating fins in communication with the airflow space;   a vapor chamber provided at one end of the solid post; and   a fan assembly positioned at the other end of the solid post and received in the airflow space to correspond to the air channels.   
     
     
         5 . The heat-dissipating device having a heat-dissipating body according to  claim 4 , wherein the extending arm is formed into a trapezoid. 
     
     
         6 . The heat-dissipating device having a heat-dissipating body according to  claim 5 , wherein the thermal-conductive element further comprises a plurality of heat-dissipating pieces, and the heat-dissipating pieces extend from the outer periphery of the solid post to be arranged between the extending arms respectively. 
     
     
         7 . The heat-dissipating device having a heat-dissipating body according to  claim 4 , wherein the fan assembly comprises a support fixedly connected to the extending arms, and a blade pivotally connected to the support. 
     
     
         8 . The heat-dissipating device having a heat-dissipating body according to  claim 4 , further comprising a fixing base connected to the heat-dissipating fins for allowing the vapor chamber to be mounted thereon, the vapor chamber being sandwiched between the fixing base and the heat-dissipating fins. 
     
     
         9 . The heat-dissipating device having a heat-dissipating body according to  claim 8 , wherein the heat-dissipating fins are provided with an annular groove, and the fixing base is formed with an annular rib inserted into the annular groove. 
     
     
         10 . The heat-dissipating device having a heat-dissipating body according to  claim 8 , wherein the vapor chamber is formed with a protrusion, and the fixing base is provided with an insertion trough for allowing the vapor chamber to be inserted therein and a through hole communicating the insertion trough for allowing the protrusion to pass through.