Patent ID: 7469554

Claim:
A motor vehicle condenser comprising: a multitude of stacked main-section plates having separate internal flow channels for refrigerating fluid and for cooling fluid, wherein the main-section plates are assembled to delimit alternating first flow channels for refrigerating fluid and second flow channels for cooling fluid and are assembled in groups or sub groups of plates such that the groups or subgroups form at least two fluid passes for each of the refrigerating and cooling fluids, wherein the main-section plates define an inlet for each of the flow channels, respectively, and an outlet for each of the flow channels, respectively, with the inlet and the outlet of each flow channel spaced from each other and with one of the fluid passes defined in one direction from the inlet to the outlet of one of the respective flow channels, wherein the plates further comprise communication passages to allow refrigerating and cooling fluid to pass from one flow channel to another and annular ducts facing the communication passages, wherein the annular ducts alternately face the communication passages in such a way that the refrigerating and cooling fluid are prevented from mixing with one another, and wherein the condenser comprises at least one condenser inlet and one condenser outlet for refrigerating fluid and at least one inlet pass (a) over the refrigerating fluid communicating with said condenser inlet, and an outlet pass (c) communicating with said condenser outlet, the cross section of the passes diminishing from the inlet pass towards the outlet pass.