Additively manufactured heat exchanger and diffuser pipe coupled to a compressor stage

An environmental control system of an aircraft comprising:

• an impeller housing,
• an impeller housed within the impeller housing,
• wherein:
• the impeller housing extends from an inlet end and to an outlet end;
• the outlet end defines circumferentially distributed radially facing outlet ports;
• and
• in operation an airflow moves along a first axial direction into the inlet end of the impeller housing and is compressed by the impeller;
• a heat exchanger that is positioned radially exterior to the impeller housing and extends axially from an inlet end to an outlet end,
• wherein:
• the inlet end of the heat exchanger defines inlet ports;
• and
• in operation airflow into the heat exchanger moves along a second axial direction that is opposite the first axial direction;
• and
• diffuser pipes,
• wherein ones of the diffuser pipes connect ones of the inlet ports of the heat exchanger with ones of the outlet ports of the impeller housing;
• wherein:
• the impeller is a cabin air compressor, the heat exchanger is a RAM air heat exchanger;
• an axially extending inlet conduit is coupled to the inlet end of the impeller housing;
• in operation, the airflow into the inlet conduit moves along the first axial direction and into the impeller housing;
• and the heat exchanger extends axially over the inlet conduit;
• and
• each diffuser pipe extends from an inlet end to an outlet end;
• the inlet end of the diffuser pipe is coupled to one of the outlet ports of the impeller housing and the outlet end of the diffuser pipe is coupled to one of the inlet ports of the heat exchanger;
• wherein each diffuser pipe is configured so that the airflow is radial at the inlet end of the diffuser pipe and axial at the outlet end of the diffuser pipe.