Heat exchanger

An apparatus for heat exchange, in particular for use in motor vehicles and especially for use in motor vehicle air-conditioning systems which have a fluid as refrigerant, at least one feed line and discharge line (1, 2) in order to introduce the fluid into the apparatus and to remove the fluid from the apparatus;

• at least two heat exchanger units, each of these heat exchanger units
• having at least one distribution space or one collection space (4a, 5a, 4b, 5b) and at least one throughflow device (7), with it being possible for the fluid to flow between the at least two distribution or collection spaces (4a, 5a, 4b, 5b) through the throughflow device (7), and
• at least one separating device (1 3a) which divides at least one distribution or collection space into two subspaces,
• at least one flow connection device (13) which connects the heat exchanger units to one another in such a manner that the refrigerant can flow between the heat exchanger units, with the flow cross sections upstream and downstream of the flow connection device assuming a predetermined ratio to one another.