INTERNAL HEAT EXCHANGER AND METHOD FOR MAKING THE SAME

摘要

An internal heat exchanger includes a sleeve having a thermally conductive spiral profile, a fluid line inlet and a fluid line outlet. The internal heat exchanger further has an inner tube defining an inner flow path and an axial direction. The inner tube is configured to have a fluid flow through the inner tube in the axial direction. The sleeve is arranged around a section of the inner tube. The spiral profile is configured to have a fluid supplied to the sleeve via the fluid inlet flow through the spiral profile to the fluid outlet while contacting the inner tube wall. The spiral profile can include a first spiral groove running in a clockwise direction and a second spiral groove running in a counterclockwise direction. The first and second spiral grooves mutually intersect at at least one cross-point.