Pump and electronic apparatus having this pump

Abstract

A pump includes: a housing having a heating receiving portion thermally connected to a heat generating element and a pump chamber; a stator; and a rotary member disposed in the pump chamber, and having a stirring portion which stirs a fluid in the pump chamber and a magnet contained within the rotary member.

1 . A pump comprising: 
 a housing having a heat receiving portion thermally connected to a heat generating element, and a pump chamber;    a stator; and    a rotary member disposed in the pump chamber, and having a stirring portion which stirs a fluid in the pump chamber and a magnet contained within the rotary member.    
   
   
       2 . The pump according to  claim 1  wherein the rotary member has a shaft, and is disposed in the pump chamber in such a posture that an axis of the shaft crosses the heat receiving portion.  
   
   
       3 . The pump according to  claim 2  wherein the magnet is formed in such a manner as to have a rectangular sectional shape whose length in a direction crossing the shaft at right angles is longer than that in a direction parallel to the shaft.  
   
   
       4 . The pump according to  claim 3  wherein 
 the rotary member has a disc-shaped rotary portion,    the rotary portion has a protruding portion disposed along a peripheral edge of a surface opposite to the surface facing the heat receiving portion and protruded in a direction opposite to that of the heat receiving portion,    the magnet is disposed in the protruding portion.    
   
   
       5 . An electronic apparatus comprising: 
 a housing having a heat generating element; and    a cooling device including a heat radiating portion, a circulation path thermally connected to the heat radiating portion, and a pump forcedly circulating a fluid in the circulation path and having a heat receiving portion thermally connected to the heat generating element,    wherein the pump comprises:    a pump housing having the heat receiving portion and a pump chamber;    a stator; and    a rotary member having a stirring portion to stir the fluid in the pump chamber, and a magnet contained within the rotary member, the rotary member feeding the fluid into the circulation path.    
   
   
       6 . The electronic apparatus according to  claim 5  wherein 
 the rotary member has a shaft, and is disposed in the pump chamber in such a posture that an axis of the shaft crosses the heat receiving portion.    
   
   
       7 . The electronic apparatus according to  claim 6  wherein 
 the magnet is formed in such a manner as to have a rectangular sectional shape whose length in a direction crossing the shaft at right angles is longer than that in a direction parallel to the shaft.    
   
   
       8 . The electronic apparatus according to  claim 7  wherein 
 the rotary member has a disc-shaped rotary portion,    the rotary portion has a protruding portion disposed along a peripheral edge of a surface opposite to the surface facing the heat receiving portion and protruded in a direction opposite to that of the heat receiving portion,    the magnet is disposed in the protruding portion.