Heat dissipation module with bent fin tabs attaching fan to fin assembly

Abstract

An exemplary heat dissipation module includes a centrifugal fan and a fin assembly located at an air outlet of the centrifugal fan. The centrifugal fan includes a frame. The fin assembly includes fins, each fin is a single monolithic body including a tab. Slits are defined in an end of the frame located at the air outlet. Each tab extends through a corresponding slit and is snapped on the frame thereby attaching the frame on the fin assembly.

What is claimed is: 
     
         1 . A heat dissipation module comprising:
 a centrifugal fan comprising a frame; and   a fin assembly located at an air outlet of the centrifugal fan, the fin assembly comprising a plurality of fins, each fin being a single monolithic body comprising a tab;   wherein a plurality of slits is defined in an end of the frame located at the air outlet, and each tab extends through a corresponding slit and is snapped on the frame thereby attaching the frame on the fin assembly.   
     
     
         2 . The heat dissipation module of  claim 1 , wherein the frame comprises a bottom plate and a top plate opposite to the bottom plate, the slits being defined in an end of the top plate located at the air outlet. 
     
     
         3 . The heat dissipation module of  claim 1 , wherein the number of slits is equal to the number of tabs, and a size of each slit is substantially equal to that of each tab, each tab penetrating through a corresponding slit, with a distal end of the tab deformed and snapped horizontally on the top plate of the frame. 
     
     
         4 . The heat dissipation module of  claim 2 , wherein each fin comprises a main body, the main bodies of the fins being aligned with each other, and being parallel to and spaced from each other, the tab of each fin extending upwardly from a top end of the main body near to the air outlet. 
     
     
         5 . The heat dissipation module of  claim 4 , wherein each main body is an “L” shaped sheet, a cutout being formed at a bottom corner of the main body. 
     
     
         6 . The heat dissipation module of  claim 4 , wherein the frame further comprises a sidewall integrally extending from a periphery of the bottom plate toward the top plate, the end of the top plate located at the air outlet extending out beyond the bottom plate. 
     
     
         7 . The heat dissipation module of  claim 6 , wherein fin assembly further comprises a rib, the rib being located at a central area of a top end of the fin assembly and resisting a part of the centrifugal fan. 
     
     
         8 . The heat dissipation module of  claim 6 , wherein a height of the sidewall is substantially equal to that of the main body of each fin, a top end of the sidewall being aligned with and substantially coplanar with the top end of the main body, a plurality of bulges each with a through hole is provided at a periphery of the top end of the sidewall, a plurality of ears each with a through hole is provided on the top plate corresponding to the bulges, and a plurality of screws is engaged in the through holes of the ears and the bulges thereby connecting the top plate and the sidewall together. 
     
     
         9 . The heat dissipation module of  claim 6 , wherein the centrifugal fan further comprises an impeller, the bottom plate, the sidewall and the top plate being engaged together and cooperatively defining a receiving space therebetween, the impeller being supported on the bottom plate and received in the receiving space. 
     
     
         10 . The heat dissipation module of  claim 5 , further comprising a flat heat pipe and a heat absorber, wherein the heat pipe comprises an evaporation section and a condenser section, the evaporation section being attached on a top surface of the heat absorber, the condenser section being received in a channel cooperatively defined by the cutouts of the fins, the bottom plate, a bottom surface of the heat pipe and bottom ends of the main bodies being aligned with each other. 
     
     
         11 . A heat dissipation module comprising:
 a fan comprising an impeller, the fan having a cavity receiving the impeller therein, and an air outlet at one side thereof communicating with the cavity; and   a fin assembly located at the air outlet of the fan, the fin assembly comprising a plurality of fins, each fin being a single monolithic body comprising a main body and a tab extending from the main body;   wherein top ends of the tabs are higher than top ends of the fins, a plurality of slits is defined in the fan at the air outlet, and each tab extends through a corresponding slit and is bent and engaged on the fan, thereby attaching the fan on the fin assembly.   
     
     
         12 . The heat dissipation module of  claim 11 , wherein the fan comprises a bottom plate and a top plate opposite to the bottom plate, the slits being defined in an end of the top plate located at the air outlet. 
     
     
         13 . The heat dissipation module of  claim 11 , wherein the number of the slits is equal to the number of the tabs, and a size of each slit is substantially equal to that of each tab, each tab penetrating through a correspondingly slit, with a distal end of the tab deformed and snapped horizontally on the top plate of the frame. 
     
     
         14 . The heat dissipation module of  claim 12 , wherein each fin comprises a main body, the main bodies of the fins being aligned with each other, and being parallel to and spaced from each other, the tab of each fin extending toward the impeller from an end of the main body near to the air outlet. 
     
     
         15 . The heat dissipation module of  claim 14 , wherein the main body is an “L” shaped sheet, a cutout being formed at a bottom corner of each main body. 
     
     
         16 . The heat dissipation module of  claim 14 , wherein the fan comprises a sidewall integrally extending from a periphery of the bottom plate toward the top plate, the end of the top plate located at the air outlet extending out beyond the bottom plate, the bottom plate, the sidewall and the bottom plate being engaged together to form the cavity. 
     
     
         17 . The heat dissipation module of  claim 16 , wherein fin assembly further comprises a rib, the rib being located at a central area of the top end of the fin assembly and resisting a part of the fan. 
     
     
         18 . The heat dissipation module of  claim 16 , wherein a height of the sidewall is substantially equal to that of the main body of each fin, a top end of the sidewall being aligned with and substantially coplanar with top end of the main body, a plurality of bulges each with a through hole is provided at a periphery of the top end of the sidewall, a plurality of ears each with a through hole being provided on the top plate corresponding to the bulges, a plurality of screws being engaged in the through holes of the ears and the bulges thereby connecting the top plate and the sidewall together. 
     
     
         19 . The heat dissipation module of  claim 16 , wherein the impeller is supported on the bottom plate. 
     
     
         20 . The heat dissipation module of  claim 16 , further comprising a flat heat pipe and a heat absorber, wherein the heat pipe comprises an evaporation section and a condenser section, the evaporation section being attached on a top surface of the heat absorber, the condenser section being received in a channel cooperatively defined by the cutouts of the fins, the bottom plate, a bottom surface of the heat pipe, and an bottom end of main body being aligned with each other.