Heat dispensing device with radially flowing coolant

Abstract

A heat dispensing device includes a base having a protrusion at an recessed space thereof and the protrusion is located at a center from which the fins extend radially. The base includes an inlet tube and an outlet tube so that coolant flows into the base via the inlet tube and out from the base via the outlet tube. A guide disk is located on the fins and positioned by multiple positioning members. A central passage defined in a center of the disk. A cover is mounted to the base and includes two grooves which are respectively in communication with inlet and outlet tubes. The coolant two chambers. The coolant flows through the central passage and is guided by the protrusion in radial direction toward the paths between the fins so as to efficiently bring heat away form the heat source in contact with the device.

1 . A heat dispensing device comprising: 
 a base having a recessed space defined therein and a protrusion extending from an inside defining the recessed space, a plurality of fins radially located in the recessed space, an inlet tube and an outlet tube extending from an outer periphery of the base and communicating with the recessed space, a first chamber located in communication between the inlet tube and the recessed space, a second chamber located in communication between the outlet tube and the recessed space, a first positioning member, a second positioning member and at least one third positioning member located in the recessed space of the base;    a guide disk located on the fins and having a central passage, a first pairs of rails and a second pair of rails, and    a cover mounted on the base with a seal member clamped therebetween, a first groove and a second groove defined in an underside of the cover, a third chamber communicating with the first groove, a fourth chamber communicating with the second groove.    
   
   
       2 . The device as claimed in  claim 1 , wherein the protrusion is located at a center from which the fins extend radially.  
   
   
       3 . The device as claimed in  claim 1 , wherein the base includes a plurality of first lugs extending from an outer periphery thereof and each first lug has a first hole defined therethrough.  
   
   
       4 . The device as claimed in  claim 1 , wherein the first positioning member, the second positioning member and the at least one third positioning member extend radially inward from an inner periphery of the recessed space of the base, the guide disk is positioned between the first positioning member, the second positioning member and the at least one third positioning member such that the central passage is located corresponding to the protrusion of the base.  
   
   
       5 . The device as claimed in  claim 1 , wherein the first groove and the second groove in the underside of the cover are respectively cooperated with the first and second pairs of rails to form two paths, the first chamber is in communication with the third chamber, the second chamber is in communication with the fourth chamber.  
   
   
       6 . The device as claimed in  claim 1 , wherein the cover includes a plurality of second lugs extending from an outer periphery thereof and each second lug has a second hole.