Cooling device for information equipment

Abstract

A cooling device for an information equipment, comprises a heat receiving member composed of a base member thermally connected to a heat generating element, and a casing member, which are defined therebetween a closes space in which a coolant can flow, the base member is integrally incorporated with fins in a predetermined zone of its planar surface on the side remote from the heat generating element thermally connected to the base member, and the base member has a thickness which is thinner in the zone where the fins are formed than in the other zone where no fins are formed. With this configuration, the heat receiving member which can enhance the heat-exchanging performance of a liquid cooling system, can be manufactured at a low cost.

1 . A cooling device for a information equipment, for cooling a heat generating element mounted in the information equipment through heat transfer by a coolant,
 said cooling device comprising:   a heat receiving member for receiving heat from said heat generating element through said coolant,   a heat radiation member for radiating the heat received through said coolant, and   a pipe line member arranged so as to circulate said coolant between said heat receiving member and said heat radiation member,   wherein said heat receiving member includes therein a closed space defined by a base member thermally connected to said heat generating element and a casing member, said closed space enabling said coolant to flow therethrough, said base member is integrally incorporated with fins defining therebetween passages through which said coolant flows in said closed space, in a predetermined zone on an opposite surface to a surface with which the base member is thermally connected with the heat generating element, and said base member has a thickness which is thinner in a zone thereof where said fins are formed, than in the other zone where no fins are formed.   
   
   
       2 . The cooling device as set forth in  claim 1 , wherein said fins formed in said base member are carved and turned up through a skiving process in a recession place carved in the base member. 
   
   
       3 . The cooling device as set forth in  claim 1 , wherein said base member has inclined surfaces at opposite end parts of said passages defined between said fins formed in said base member, each of the inclined surfaces being extended from a height position of a thin wall part of said base member in which said fins are formed, to a thick wall part of said base member. 
   
   
       4 . The cooling device as set forth in  claim 2 , wherein said base member has inclined surfaces at opposite end parts of said passages defined between said fins formed in said base member, each of the inclined surfaces being extended from a height position of a thin wall part of said base member in which said fins are formed, to a thick wall part of said base member. 
   
   
       5 . The cooling device as set forth in  claim 1 , wherein said casing member has a pressing member which is integrally incorporated with said casing member or which is formed, separate from said casing member, and is then jointed to said casing member, for pressing upper end parts of said fins when constituting the heat receiving member in cooperation with the base member, a size of said fin pressing member is smaller than a widthwise length of said fins in a longitudinal direction of said passages between said fins, and greater than a length of a row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       6 . The cooling device as set forth in  claim 2 , wherein said casing member has a pressing member which is integrally incorporated with said casing member or which is formed, separate from said casing member, and is then jointed to said casing member, for pressing upper end parts of said fins when constituting the heat receiving member in cooperation with the base member, a size of said fin pressing member is smaller than a widthwise length of said fins in a longitudinal direction of said passages between said fins, and greater than a length of a row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       7 . The cooling device as set forth in  claim 1 , wherein said casing member is provided at its upper surface with an inlet port for said coolant, and is provided above said fins with a header for introducing said coolant flowing from said inlet port through upper parts of said fins, said header having a length which is substantially equal to the length of the row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       8 . The cooling device as set forth in  claim 2 , wherein said casing member is provided at its upper surface with an inlet port for said coolant, and is provided above said fins with a header for introducing said coolant flowing from said inlet port through upper parts of said fins, said header having a length which is substantially equal to the length of the row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       9 . The cooling device as set forth in  claim 3 , wherein said casing member is provided at its upper surface with an inlet port for said coolant, and is provided above said fins with a header for introducing said coolant flowing from said inlet port through upper parts of said fins, said header having a length which is substantially equal to the length of the row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       10 . The cooling device as set forth in  claim 4 , wherein said casing member is provided at its upper surface with an inlet port for said coolant, and is provided above said fins with a header for introducing said coolant flowing from said inlet port through upper parts of said fins, said header having a length which is substantially equal to the length of the row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       11 . The cooling device as set forth in  claim 5 , wherein said casing member is provided at its upper surface with an inlet port for said coolant, and is provided above said fins with a header for introducing said coolant flowing from said inlet port through upper parts of said fins, said header having a length which is substantially equal to the length of the row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       12 . The cooling device as set forth in  claim 6 , wherein said casing member is provided at its upper surface with an inlet port for said coolant, and is provided above said fins with a header for introducing said coolant flowing from said inlet port through upper parts of said fins, said header having a length which is substantially equal to the length of the row of said fins in a direction orthogonal to said passages between said fins. 
   
   
       13 . A cooling device for cooling a heat generating element mounted in an information equipment through heat transfer by coolant, comprising:
 narrow pitch fins for thermally transferring heat generated from said heat generating element, to said coolant,   a fin base thermally connected to the heat generating element, having a thickness which is thinner in a zone where said narrow pitch fins are formed, than in a zone where no narrow pitch fins are formed, and   a casing connected to said fin base and forming therein a closed space in which said coolant flows.   
   
   
       14 . The cooling device as set forth in  claim 13 ,
 wherein said fin base has an inclined surface extended from a height position of a thin wall part of said base member where said fins are formed, to a height position of a thick wall part of said base member.   
   
   
       15 . The cooling device as set forth in  claim 13 ,
 wherein said narrow pitch fins which are arranged in parallel with one another in one direction of said fin base so as to allow the coolant to flow, and   there is provided a coolant inflow header having a space which is extended orthogonally to said fins, on one side of said narrow pitch fins, which is remote from said fin base.   
   
   
       16 . The cooling device as set forth in  claim 13 ,
 wherein the coolant flowing into from said inflow header flows through between said narrow pitch fins in a down-flow pattern, and is discharged in a longitudinal direction of said narrow pitch fins.