Nested heat exchangers

Abstract

A heat exchanging apparatus may include a first heat exchanger and a second heat exchanger, which may be flat plate heat exchangers and may be located entirely within an end tank of a third heat exchanger. The first and second heat exchangers each may include an inlet and an outlet and may be plate style heat exchangers. The entire first heat exchanger is located between the inlet and the outlet of the second heat exchanger. A first heat exchanger inlet mount surface, a first heat exchanger outlet mount surface, a second heat exchanger inlet mount surface and a second heat exchanger outlet mount surface may each terminate in a single plane. The third heat exchanger end tank may define a hole such that the hole is located aft of the first heat exchanger and the second heat exchanger with respect to a direction of coolant flow through the end tank.

1 . A heat exchanging apparatus comprising:
 a first heat exchanger comprising:
 a first inlet; and 
 a first outlet; 
   a second heat exchanger comprising:
 a second inlet; and 
 a second outlet; 
   wherein the entire second heat exchanger is located between the inlet and the outlet of the first heat exchanger.   
     
     
         2 . The heat exchanging apparatus of  claim 1 , wherein one of the first heat exchanger or the second heat exchanger is a concentric heat exchanger with a hollow center about its longitudinal axis and another of the first heat exchanger or the second heat exchanger is a stacked plate heat exchanger. 
     
     
         3 . The heat exchanging apparatus of  claim 2 , wherein the first heat exchanger and the second heat exchanger are welded together. 
     
     
         4 . The heat exchanging apparatus of  claim 1 , further comprising:
 a third heat exchanger comprising:
 a side end tank defining a liquid chamber; and 
 a side end tank, wherein the entire first and the entire second heat exchanger are located with the side end tank. 
   
     
     
         5 . The heat exchanging apparatus of  claim 4 , wherein:
 the first inlet further comprises a first inlet mount surface;   the first outlet further comprises a first outlet mount surface;   the second inlet further comprises a second inlet mount surface; and   the second outlet further comprises a second outlet mount surface, wherein the first inlet mount surface, the first outlet mount surface, the second inlet mount surface and the second outlet mount surface each terminate in a single plane.   
     
     
         6 . The heat exchanging apparatus of  claim 5 , wherein the first inlet mount surface, the first outlet mount surface, the second inlet mount surface and the second outlet mount surface are mounted to an inside surface of the side end tank. 
     
     
         7 . The heat exchanging apparatus of  claim 4 , wherein the third heat exchanger end tank further defines a hole, wherein the hole is located aft of the first heat exchanger and the second heat exchanger with respect to a direction of coolant flow. 
     
     
         8 . A heat exchanging apparatus comprising:
 a first heat exchanger comprising:
 a first inlet; 
 a first outlet; and 
 a plurality of plates separated by a plurality of gaps; 
   a second heat exchanger comprising:
 a second inlet; 
 a second outlet; and 
 a plurality of plates separated by a plurality of gaps; 
   a third heat exchanger comprising:
 a side end tank defining a liquid chamber; and 
 a side end tank, 
   wherein:
 the entire first heat exchanger and the entire second heat exchanger are located within the side end tank, 
 the entire first heat exchanger is located between the inlet and the outlet of the second heat exchanger, and 
 the first heat exchanger and the second heat exchanger are connected together. 
   
     
     
         9 . The heat exchanging apparatus of  claim 8 , wherein
 the first inlet, the first outlet, the second inlet, and the second outlet each protrude through a wall of the end tank.   
     
     
         10 . The heat exchanging apparatus of  claim 9 , wherein:
 the first inlet further comprises a first inlet mount surface;   the first outlet further comprises a first outlet mount surface;   the second inlet further comprises a second inlet mount surface; and   the second outlet further comprises a second outlet mount surface, wherein:   the first inlet mount surface, the first outlet mount surface, the second inlet mount surface and the second outlet mount surface each terminate in a single plane, and   the first inlet mount surface, the first outlet mount surface, the second inlet mount surface and the second outlet mount surface are mounted to an inside surface of the side end tank.   
     
     
         11 . The heat exchanging apparatus of  claim 10 , wherein the first heat exchanger and the second heat exchanger are a single component. 
     
     
         12 . The heat exchanging apparatus of  claim 11 , wherein the third heat exchanger end tank further defines a hole, wherein the hole is located aft of the first heat exchanger and the second heat exchanger with respect to a direction of coolant flow. 
     
     
         13 . The heat exchanging apparatus of  claim 12 , wherein the first heat exchanger and the second heat exchanger are flat plate heat exchangers. 
     
     
         14 . A heat exchanging apparatus comprising:
 a first heat exchanger comprising:
 a first heat exchanger inlet and a first heat exchanger outlet that pass through a first heat exchanger top plate surface; 
   a second heat exchanger comprising:
 a second heat exchanger inlet and a second heat exchanger outlet that pass through a second heat exchanger top plate surface, 
 wherein the first heat exchanger top plate surface is in the same plane as the second heat exchanger top plate surface. 
   
     
     
         15 . The heat exchanging apparatus of  claim 14 , further comprising:
 a first separator plate positioned between the first heat exchanger and the second heat exchanger; and   a second separator plate positioned between the first heat exchanger and the second heat exchanger.   
     
     
         16 . The heat exchanging apparatus of  claim 15 , wherein the first separator plate and the second separator plate prevent liquid from passing between the first heat exchanger and the second heat exchanger. 
     
     
         17 . The heat exchanging apparatus of  claim 16 , wherein the separator plate further comprises:
 a plurality of protrusions projecting from a main body portion of the separator plate.   
     
     
         18 . The heat exchanging apparatus of  claim 17 , wherein each heat exchanger is further comprised of a plurality of half plates arranged for liquid flow, each plate having a half plate defining a recession formed perpendicular to a longitudinal centerline of each plate. 
     
     
         19 . The heat exchanging apparatus of  claim 18 , wherein each half plate further defines a plurality of holes. 
     
     
         20 . The heat exchanging apparatus of  claim 19 , wherein the plurality of protrusions of the separator plate reside within the plurality of holes of the half plates.