Heat sink

Abstract

There is provided a heat sink capable of keeping a heating element at a desired temperature without using a unit other than the heat sink. The heat sink of the present invention includes: closed container 3 covered with heat insulation material 2; heat transfer member 12 constructed of heat transfer part 10, which is brought into contact with heating element 1, and heat transfer fin 5 provided in such a way as to extend from a face on a side opposite to a face that belongs to heat transfer part 10 and at which heat transfer part 10 is brought into contact with heating element 1; heat radiation fin 7 for radiating heat; and heat storage material 4 enclosed in closed container 3. Heat transfer part 10 of heat transfer member 12 is built in one face of closed container 3 in such a way as to penetrate the one face, and the face that belongs to heat transfer part 10 and at which heat transfer part 10 is brought into contact with heating element 1 is protruded to the outside, and heat radiation fin 5 is located inside closed container 3, and heat radiation fin 7 penetrates a face that belongs to the closed container 3 and that is opposed to a face at which heat transfer part 10 is located and has one end portion thereof located inside closed container 3 and has the other end portion thereof located outside closed container 3. Further, heat radiation fin 7 and heat transfer fin 5 are arranged in such a way as not to be brought into contact with each other.

1 . A heat sink comprising:
 a closed container covered with a heat insulation material;   a heat transfer member constructed of: a heat transfer part built in one face of the closed container in such a way as to penetrate said one face and brought into contact with a heating element; and a heat transfer fin located in the closed container and provided in such a way as to extend from a face on a side opposite to a face that belongs to the heat transfer part and at which the heat transfer part is brought into contact with the heating element;   a heat radiation fin for radiating heat; and   a heat storage material enclosed in the closed container,   wherein the face that belongs to the heat transfer part and at which the heat transfer part is brought into contact with the heating element is protruded to the outside,   wherein the heat radiation fin penetrates a face that belongs to the closed container and that is opposed to a face at which heat transfer part is located, and has a portion of one end thereof located inside the closed container, and has a portion of other end thereof located outside the closed container, and   wherein the heat radiation fin and the heat transfer fin are arranged in such a way as not to be brought into contact with each other.   
     
     
         2 . The heat sink according to  claim 1 ,
 wherein intervals between the plurality of heat transfer fins are equal, and   wherein portions of one end of the heat radiation fins are located between the heat transfer fins.   
     
     
         3 . The heat sink according to  claim 1 ,
 wherein the heat transfer fin and the heat radiation fin are formed in a planar shape or in a columnar shape.   
     
     
         4 . The heat sink according to claim I,
 wherein the heat transfer fin and the heat radiation fin are made of a metal material.   
     
     
         5 . The heat sink according to  claim 1 ,
 wherein a clearance that is not filled with the heat storage material is provided in the closed container.   
     
     
         6 . The heat sink according to  claim 1 ,
 wherein the heat storage material is paraffin.   
     
     
         7 . A method of controlling a temperature of a heat sink, the method comprising the steps of:
 transferring heat generated by a heating element to a heat transfer fin through a heat transfer part brought into contact with the heating element located outside one face of a closed container covered with a heat insulation material, the heat transfer fin being provided in such a way as to extend from a face on a side opposite to a face that belongs to the heat transfer part housed in the closed container and at which the heat transfer part is brought into contact with the heating element;   transferring heat, which is transferred to the heat transfer fin, to a heat storage material enclosed in the closed container and brought into contact with the heat transfer fin;   radiating heat, which is transferred to the heat storage material, to the outside of a heat sink from a heat radiation fin that penetrates a face that belongs to the closed container and that is opposed to a face at which heat transfer part is located, and has a portion of one end thereof located inside the closed container, and has a portion of the other end thereof located outside the closed container, and preventing heat radiation to the outside from the closed container itself by the heat insulation material to thereby match a temperature of the heating element with a melting point of the heat storage material.   
     
     
         8 . The method of controlling a temperature of a heat sink according to  claim 7 , further comprising the step of bringing the heat radiation fin into contact with the heat storage material and radiating heat of the heat storage material to the outside of the closed container by the heat radiation fin when the heat storage material changes into a liquid phase to thereby cool the heating element to again solidify the heat storage material in the liquid phase. 
     
     
         9 . The method of controlling a temperature of a heat sink according to  claim 7 , further comprising the step of enclosing the heat storage material in the closed container, the heat storage material being made of material having a melting point equal to a temperature at which the heating element needs to be kept.