Patent ID: 7836943

Claim:
A heat exchanger for transferring heat to or from a working fluid, comprising: a) a heat transfer surface constructed and arranged to transfer heat to or from the working fluid; b) a manifold region spaced from said heat transfer surface; c) a heat transfer region disposed between said manifold region and said heat transfer surface; d) a plurality of internal walls defining a plurality of inlet and outlet passages in said manifold region, said internal walls extending into said heat transfer region in a direction substantially normal to said heat transfer surface so as to provide a plurality of alternating inflow and outflow portions, said inflow portions being in fluid communication with corresponding ones of said plurality of inlet passages, said outflow portions being in fluid communication with corresponding ones of said plurality of outlet passages, and wherein adjacent ones of said plurality of inflow portions and said plurality of outflow portions are in fluid communication with each other; d) a heat transfer structure disposed in each of said plurality of inflow portions and extending between the internal walls of said inflow portions, said heat transfer structure in thermal communication with said heat transfer surface so as to transfer heat between the working fluid and the heat transfer surface.