LIQUID / GAS TYPE HEAT EXCHANGER, IN PARTICULAR FOR A MOTOR VEHICLE AIR CONDITIONING EQUIPMENT USING A SUPERCRITICAL OPERATING REFRIGERANT FLUID SUCH AS CO2

摘要

The exchanger (WGC2; WGC3) comprises at least two adjacent coolers (30, 40; 30 ', 40'), each having a bundle (34) of elongate multichannel tubes traversed by the refrigerant gas, joined by collector boxes. end (36, 38) connected to a refrigerant gas circuit of the air conditioning equipment. A housing (50) encloses the tube bundle and forms an interior space with an inlet and a coolant outlet to allow it to flow between the tubes of the bundle. The two casings have a common wall (52) having at least one orifice (60) for placing the two inner volumes in communication. It is thus possible to produce a compact gas cooler incorporating in the same block two water / gas exchange stages (WGC2, WGC3), as well as possibly an internal gas / gas exchanger of the air conditioning circuit.