Heat exchanger

Abstract

A heat exchanger is disclosed. The heat exchanger includes an inlet header, an outlet header, and a plurality of coaxially arranged bent tubes extending from the inlet header to the outlet header. At least one of the plurality of bent tubes being non-coplanar relative to at least one of remaining bent tubes.

What is claimed is: 
     
         1 . A heat exchanger, comprising:
 an inlet header;   an outlet header; and   a plurality of coaxially arranged bent tubes extending from the inlet header to the outlet header, wherein at least one of the plurality of bent tubes being non-coplanar relative to at least one of remaining bent tubes.   
     
     
         2 . The heat exchanger of  claim 1 , wherein the plurality of bent tubes includes
 a first tube group arranged on a first side of the inlet header and the outlet header, and   a second tube group arranged on a second side of the inlet header and the outlet header.   
     
     
         3 . The heat exchanger of  claim 1 , wherein
 the inlet header defines a plurality of inlet ports to enable a flow of a fluid to the plurality of bent tubes, and   the outlet header defines a plurality of outlet ports to facilitate an exit of the fluid from the plurality of bent tubes.   
     
     
         4 . The heat exchanger of  claim 1 , wherein each of the plurality of bent tubes extends arcuately around a central axis of the heat exchanger. 
     
     
         5 . The heat exchanger of  claim 1 , wherein a cross-sectional area of the inlet header varies along a central longitudinal axis of the inlet header. 
     
     
         6 . The heat exchanger of  claim 1 , wherein a cross-sectional area of the outlet header varies along a central longitudinal axis of the outlet header. 
     
     
         7 . The heat exchanger of  claim 1 , wherein each of the plurality of bent tubes defines a substantially polygonal shape. 
     
     
         8 . The heat exchanger of  claim 1 , wherein a diameter of at least one of the plurality of bent tubes is different from a diameter of at least one of remaining bent tubes. 
     
     
         9 . A heat transfer system, comprising:
 a fan; and   a heat exchanger arranged upstream or downstream of the fan relative to a direction of air flow generated by the fan, the heat exchanger includes
 an inlet header, 
 an outlet header, and 
 a plurality of coaxially arranged bent tubes extending from the inlet header to the outlet header, wherein at least one of the plurality of bent tubes being non-coplanar relative to at least one of remaining bent tubes. 
   
     
     
         10 . The heat transfer system of  claim 9 , wherein the plurality of bent tubes includes
 a first tube group arranged on a first side of the inlet header and the outlet header, and   a second tube group arranged on a second side of the inlet header and the outlet header.   
     
     
         11 . The heat transfer system of  claim 9 , wherein
 the inlet header defines a plurality of inlet ports to enable a flow of a fluid to the plurality of bent tubes, and   the outlet header defines a plurality of outlet ports to facilitate an exit of the fluid from the plurality of bent tubes.   
     
     
         12 . The heat transfer system of  claim 9 , wherein a cross-sectional area of the inlet header varies along a central longitudinal axis of the inlet header. 
     
     
         13 . The heat transfer system of  claim 9 , wherein a cross-sectional area of the outlet header varies along a central longitudinal axis of the outlet header. 
     
     
         14 . The heat transfer system of  claim 9 , wherein a cross-sectional area of the outlet header varies along a central longitudinal axis of the outlet header. 
     
     
         15 . The heat transfer system of  claim 9 , wherein a diameter of at least one of the plurality of bent tubes is different from a diameter of at least one of remaining bent tubes. 
     
     
         16 . The heat transfer system of  claim 9 , wherein the fan is a hub-less fan including a shroud and a plurality of blades arrayed circularly around a central axis of the shroud and extending radially inwardly from an inner surface of the shroud. 
     
     
         17 . A heat exchanger, comprising:
 an inlet header;   an outlet header arranged diametrically opposite to the inlet header; and   a plurality of coaxially arranged bent tubes extending from the inlet header to the outlet header, wherein
 at least one of the plurality of bent tubes being non-coplanar relative to at least one of remaining bent tubes, and 
 a cross-sectional area of the inlet header varies along a length of the inlet header. 
   
     
     
         18 . The heat exchanger of  claim 17 , wherein the plurality of bent tubes includes
 a first tube group arranged on a first side of the inlet header and the outlet header, and   a second tube group arranged on a second side of the inlet header and the outlet header.   
     
     
         19 . The heat exchanger of  claim 17 , wherein
 the inlet header defines a plurality of inlet ports to enable a flow of a fluid to the plurality of bent tubes, and   the outlet header defines a plurality of outlet ports to facilitate an exit of the fluid from the plurality of bent tubes.   
     
     
         20 . The heat exchanger of  claim 17 , wherein the plurality of bent tubes together defines a substantially frustoconical shape.