Oil cooling heat exchanger has outer pipe with helical rectangular section wire flute defining flow chamber with inner pipe

摘要

The heat exchanger has an outer pipe (2) and an inner pipe (3) between which is a helical partition wall defining a helical channel (6) for a heat exchange medium. The partition wall can be made out of wire with a near rectangular cross section, with a height to width ratio of not more than four. The partition wall is attached to the inner pipe at point connections.