Heat dissipation device

Abstract

The heat dissipation device is provided with a body portion, to which a heating element is thermally coupled. A coolant passage through which the coolant, which dissipates heat of the heating element, flows is provided in the body portion. A passage forming portion, which forms at least one of an inflow passage and an outflow passage, is molded integrally with the body portion.

What is claimed is: 
     
         1 . A heat dissipation device comprising:
 a body portion thermally coupled with a heating element, wherein the body portion includes therein a coolant passage through which coolant, which dissipates heat of the heating element, flows;   an inflow passage, which admits the coolant into the coolant passage;   an outflow passage, which allows the coolant to flow out of the coolant passage; and   a flow passage forming portion formed integrally with the body portion, wherein the flow passage forming portion forms at least one of the inflow passage and the outflow passage.   
     
     
         2 . The heat dissipation device according to  claim 1 , wherein
 the body portion includes a case, including a recessed portion, and a lid member, which is attached to the case in a state in which it covers the recessed portion to form the coolant passage with the case, and   the heat dissipation device further includes a position determining pin formed integrally with the case to determine a position of the lid member with respect to the case.   
     
     
         3 . The heat dissipation device according to  claim 1 , further comprising a fin molded integrally with the body portion and arranged inside the coolant passage. 
     
     
         4 . The heat dissipation device according to  claim 1 , wherein the body portion and the flow passage forming portion are casts. 
     
     
         5 . The heat dissipation device according to  claim 1 , wherein the body portion and the flow passage forming portion are articles formed by cutting. 
     
     
         6 . The heat dissipation device according to  claim 1 , the body portion and the flow passage forming portion are forgings.