CPC F24F 11/48 (2018.01) [B60H 1/00564 (2013.01); B64F 1/364 (2013.01); F24F 13/0272 (2013.01); F24F 13/06 (2013.01); F24F 2221/125 (2013.01)] | 16 Claims |
1. An insulating preconditioned air delivery system, for connecting to a PCA airflow from a PCA unit flowing in a downstream direction, comprising:
a supply hose to carry a supply airflow;
an annular parallel flow channel to carry a parallel insulating airflow;
said annular parallel flow channel concentrically surrounding the supply hose;
an annular counterflow channel to carry an insulating counterflow in an upstream direction;
said annular counterflow channel concentrically surrounding the annular parallel flow channel; and
a counterflow intake hose to fluidically connect the annular counterflow channel to a supplemental air intake on the PCA unit.
|