Patent ID: 7650934

Claim:
A heat exchanger for cooling refrigerant by an air stream flowing therethrough in a flow direction, comprising: a plurality of header tubes comprising two inlet header tubes and two outlet header tubes; a plurality of tubes arranged essentially in a horizontal direction; an inlet for the refrigerant, wherein the inlet is connected to the two inlet header tubes such that the refrigerant is configured to pass into both of the two inlet header tubes; an outlet for the refrigerant, wherein the outlet is connected to the two outlet header tubes such that the refrigerant is configured to pass out of both of the two outlet header tubes; and a diagonal flow deflection member, wherein the heat exchanger is subdivided into a plurality of subblocks of said tubes, wherein each subblock is in fluid communication with a corresponding header tube, wherein each of the subblocks has a frontal area facing said flow direction that has a size that is preselected dependent on sizes of regions having different air temperatures, wherein the subblock through which refrigerant flows first after said inlet is arranged within a region having a higher air temperature than at least one other region, and wherein the diagonal flow deflection member is located between the respective headers of two subblocks, for diagonally transmitting flow from an upstream subblock to a subsequent subblock displaced in the downstream direction with respect to the upstream subblock.