Dust-disposal heat-dissipation device with double cooling fans

Abstract

A heat dissipation device includes a fin set, a cover, a first fan, a second fan and a control module. The fin set includes a plurality of cooling fins transversely spaced apart and has a substantially flat section at a bottom thereof for contacting a heat source. The cover includes a plate which covers a top surface of the fin set and has two inlets longitudinally spaced apart. The first and second fans are mounted in the two inlets of the cover for generating airflow toward front and rear top sections of the fin set respectively. Additionally, the control module is configured to either actuate the first and second fans upon receiving a working signal or execute the following steps upon receiving a dust-disposal signal: (a). turning on the first cooling fan and turn off the second cooling fan simultaneously for a period of time; and (b). turning on the second cooling fan and turn off the first cooling fan simultaneously for a period of time.

1 . A heat dissipation device, comprising:
 a fin set including a plurality of cooling fins transversely spaced apart and having a substantially flat section at a bottom thereof for contacting a heat source;   a cover including a main plate which covers a top surface of the fin set and has two inlets defined therein and longitudinally spaced apart; and   a first cooling fan mounted in one of the two inlets of the cover for generating airflow toward a front top section of the fin set;   a second cooling fan mounted in the other inlet of the cover for generating airflow toward a rear top section of the fin set; and   a control module configured to either actuate the first and second fans upon receiving a working signal or execute the following steps upon receiving a dust-disposal signal:   (a). turning on the first cooling fan and turn off the second cooling fan simultaneously for a period of time; and   (b). turning on the second cooling fan and turn off the first cooling fan simultaneously for a period of time.   
     
     
         2 . The heat dissipation device of  claim 1 , wherein after the step (a) but before the step (b), the control module further executes the step of turning on the first and second cooling fans simultaneously. 
     
     
         3 . The heat dissipation device of  claim 1 , wherein the bottom of the fin set further has a front inclined section and a rear inclined section on opposite sides of the flat section; and the front and rear inclined sections face obliquely towards the first and second cooling fans respectively and both are slanted toward the flat section. 
     
     
         4 . The heat dissipation device of  claim 2 , wherein the bottom of the fin set further has a front inclined section and a rear inclined section on opposite sides of the flat section; and the front and rear inclined sections face obliquely towards the first and second cooling fans respectively and both are slanted toward the flat section. 
     
     
         5 . A control module employed to control a first cooling fan and a second cooling fan and configured to either actuate the first and second fans upon receiving a working signal or execute the following steps upon receiving a dust-disposal signal:
 (a). turning on the first cooling fan and turn off the second cooling fan simultaneously for a period of time; and   (b). turning on the second cooling fan and turn off the first cooling fan simultaneously for a period of time.   
     
     
         6 . The control module of  claim 5 , wherein after the step (a) but before the step (b), the control module further executes the step of turning on the first and second cooling fans simultaneously. 
     
     
         7 . A fin set comprising a plurality of cooling fins transversely spaced apart, and having a substantially flat section, a front inclined section and a rear inclined section at a bottom thereof; the flat section situated in between the front and rear inclined sections for contacting a heat source; and the front and rear inclined sections being slanted toward the flat section.