Cooling device and cooling unit including the same

Abstract

A cooling device includes a first cold plate, a pair of manifolds, an inflow pipe, and an outflow pipe. The pair of manifolds oppose each other across the first cold plate, and each includes a first refrigerant pipe through which the refrigerant flows. The inflow pipe extends from one manifold to the inflow port of the first cold plate, and allows the refrigerant to flow toward the cold plate. The outflow pipe extends from the outflow port of the first cold plate to the other manifold, and allows the refrigerant to flow out toward the other manifold. The first refrigerant pipe extends in an intersecting direction intersecting the opposing direction of the pair of manifolds. The inflow pipe and the outflow pipe are connected to the refrigerant pipe via an elbow located on an upper surface or a lower surface of each of the manifolds.

What is claimed is: 
     
         1 . A cooling device comprising:
 a first cold plate including a lower surface that comes into thermal contact with a heat generating component, and including a first refrigerant flow path in which a refrigerant flows;   a pair of manifolds opposing each other across the first cold plate and each including a first refrigerant pipe through which the refrigerant flows;   an inflow pipe extending from one of the pair of manifolds to an inflow port of the first cold plate and allowing the refrigerant to flow toward the first cold plate; and   an outflow pipe extending from an outflow port of the first cold plate to another of the pair of manifolds and allowing the refrigerant to flow out toward the another of the pair of manifolds; wherein   the first refrigerant pipe extends in an intersecting direction intersecting an opposing direction of the pair of manifolds; and   at least one of the inflow pipe and the outflow pipe are connected to the first refrigerant pipe via an elbow located on an upper surface or a lower surface of each of the pair of manifolds.   
     
     
         2 . The cooling device according to  claim 1 , wherein the inflow pipe and the outflow pipe are connected to the first refrigerant flow path via an elbow located on an upper surface of the first cold plate. 
     
     
         3 . The cooling device according to  claim 1 , further comprising:
 a supply pipe to supply the refrigerant to one of the pair of manifolds; and   a discharge pipe to discharge the refrigerant from another of the pair of manifolds; wherein   at least one of the supply pipe and the discharge pipe is connected to the first refrigerant pipe via an elbow located on an upper surface or a lower surface of each of the pair of manifolds.   
     
     
         4 . The cooling device according to  claim 3 , wherein
 the supply pipe and the discharge pipe are drawn out in a same direction in the opposing direction; and   one of the supply pipe and the discharge pipe is connected to the first refrigerant pipe at an end in the intersecting direction of one of the pair of manifolds located on a side opposite to a drawing direction of the supply pipe and the discharge pipe.   
     
     
         5 . The cooling device according to  claim 4 , wherein the end in the intersecting direction of the one of the pair of manifolds located on the side opposite to the drawing direction protrudes in the intersecting direction with respect to an end in the intersecting direction of another of the pair of manifolds located on the drawing direction side. 
     
     
         6 . The cooling device according to  claim 1 , further comprising a bracket including:
 a top wall in a plate shape covering the first cold plate from above; and   legs extending downward from an outer periphery of the top wall and located outside the pair of manifolds in the opposing direction or the intersecting direction; wherein   the pair of manifolds is fixed to the legs.   
     
     
         7 . The cooling device according to  claim 6 , wherein a lower end of the one of the pair of manifolds is above an upper end of the first cold plate. 
     
     
         8 . The cooling device according to  claim 7 , wherein a gap in a vertical direction between the top wall and one of the pair of manifolds is larger than a gap in the vertical direction between the one of the pair of manifolds and the first cold plate. 
     
     
         9 . The cooling device according to  claim 6 , wherein the top wall at least partially overlaps the elbow located on an upper surface of the one of the pair of manifolds in a top view. 
     
     
         10 . The cooling device according to  claim 1 , wherein the opposing direction and the intersecting direction are orthogonal to each other. 
     
     
         11 . The cooling device according to  claim 1 , wherein a plurality of the first cold plates are provided in the intersecting direction and are connected in parallel via the pair of manifolds. 
     
     
         12 . The cooling device according to  claim 1 , wherein
 a plurality of the first cold plates are arranged between the pair of manifolds;   the inflow pipe extends from the one of the pair of manifolds and branches to be connected to the inflow ports of the plurality of first cold plates respectively; and   the outflow pipe extends from the other of the pair of manifolds and branches to be connected to the outflow ports of the plurality of first cold plates respectively.   
     
     
         13 . The cooling device according to  claim 12 , wherein two of the plurality of first cold plates are provided in the opposing direction. 
     
     
         14 . The cooling device according to  claim 12 , wherein the inflow pipe or the outflow pipe branches on an elbow located on an upper surface of one of the plurality of first cold plates. 
     
     
         15 . The cooling device according to  claim 12 , wherein
 a cross-sectional area of a flow path of the inflow pipe located upstream of a branch point is larger than a cross-sectional area of a flow path of the inflow pipe located downstream of the branch point; and   a cross-sectional area of a flow path of the outflow pipe located downstream of the branch point is larger than a cross-sectional area of a flow path of the outflow pipe located upstream of the branch point.   
     
     
         16 . The cooling device according to  claim 1 , wherein
 each of the inflow pipe and the outflow pipe includes:
 an inner diameter portion having a tubular shape and defining a flow path for the refrigerant; and 
 an outer diameter portion having a tubular shape and covering and protecting the inner diameter portion; 
   the inner diameter portion is made of a resin having a water absorption rate lower than a water absorption rate of the outer diameter portion; and   the outer diameter portion is made of a resin having a bending stress larger than a bending stress of the inner diameter portion.   
     
     
         17 . The cooling device according to  claim 1 , wherein
 one of the inflow pipe and the outflow pipe is connected to the first refrigerant pipe via an elbow located on an upper surface or a lower surface of one of the pair of manifolds; and   another of the inflow pipe and the outflow pipe is connected to the first refrigerant pipe via a connector located on a side surface of another of the pair of manifolds.   
     
     
         18 . The cooling device according to  claim 1 , further comprising:
 a second cold plate including a lower surface that comes into thermal contact with a heat generating component and located below one of the pair of manifolds; wherein   the second cold plate includes a second refrigerant flow path that communicates with the first refrigerant pipe and in which the refrigerant flows.   
     
     
         19 . The cooling device according to  claim 6 , wherein
 at least one of the inflow pipe and the outflow pipe is provided with a band portion that tightens and fixes an outer peripheral surface to the elbow; and   the top wall has an opening portion that opens to oppose the band portion in the vertical direction.   
     
     
         20 . The cooling device according to  claim 1 , wherein the first cold plate includes an inclined surface in which an upper end portion of a surface opposing one of the pair of manifolds in the opposing direction is inclined in a direction away from the one of the pair of manifolds in the opposing direction as the upper end portion goes upward. 
     
     
         21 . The cooling device according to  claim 1 , wherein the elbow located on the upper surface or the lower surface of the one of the pair of manifolds includes a protruding portion protruding in a direction approaching the first cold plate in the opposing direction from a peripheral edge of the one of the pair of manifolds. 
     
     
         22 . The cooling device according to  claim 21 , wherein the elbow located on the upper surface or the lower surface of the one of the pair of manifolds includes an extending portion extending in a direction away from the first cold plate from a center in the opposing direction of the one of the pair of manifolds. 
     
     
         23 . The cooling device according to  claim 1 , further comprising a buffer between the first cold plate and the pair of manifolds in the opposing direction. 
     
     
         24 . The cooling device according to  claim 6 , further comprising a buffer between the top wall and the pair of manifolds in the vertical direction. 
     
     
         25 . A cooling assembly comprising:
 a plurality of the cooling devices according to  claim 1  arranged in the intersecting direction; wherein   one of the pair of manifolds connected to the inflow pipe and another of the pair of manifolds connected to the outflow pipe are adjacent to each other in the intersecting direction.