Air blower and electronic apparatus

Abstract

An air blower includes a plurality of fans including a first fan and a second fan. The first fan has a plurality of fins. The second fan has a plurality of fins. The number of the plurality of fins of the second fan is different from that of the plurality of fins of the first fan.

1 . An air blower comprising
 a plurality of fans including
 a first fan having a plurality of fins, and 
 a second fan having a plurality of fins, the number of which is different from that of the plurality of fins of the first fan. 
   
     
     
         2 . The air blower according to  claim 1 , wherein
 at least one of the number of the plurality of fins of the first fan and the number of the plurality of fins of the second fan is a prime number.   
     
     
         3 . The air blower according to  claim 2 , wherein
 both the number of the plurality of fins of the first fan and the number of the plurality of fins of the second fan are prime numbers.   
     
     
         4 . The air blower according to  claim 1 , further comprising a controller configured to control the plurality of fans to rotate at different revolution speeds. 
     
     
         5 . The air blower according to  claim 4 , wherein
 the controller causes the first fan to rotate at a first revolution speed and causes the second fan to rotate at a second revolution speed that exhibits a difference from the first revolution speed by a predetermined revolution speed.   
     
     
         6 . The air blower according to  claim 5 , wherein
 the controller generates a control signal, with the difference being defined as a fixed difference.   
     
     
         7 . The air blower according to  claim 4 , wherein
 the controller controls at least the revolution speed of the first fan on the basis of a temperature of a heat-generating element.   
     
     
         8 . An electronic apparatus comprising:
 one of a heat-generating element and a heat-receiving element; and   an air blower including a plurality of fans including
 a first fan having a plurality of fins, and 
 a second fan having a plurality of fins, the number of which is different from that of the plurality of fins of the first fan, the air blower being configured to deliver air to one of the heat-generating element and the heat-receiving element.