Patent ID: 9132919
Filing Date: 2015-09-15
Classification: B64D,F01D,F04D,F25B

Abstract:
1. An environmental control system, comprising: an air cycle machine for conditioning an interior space with cooling air, the air cycle machine including a fan coupled to a shaft that rotates about a shaft axis, the fan being located at a distal end of the air cycle machine; a speed sensor module having a speed sensor for sensing a rotational speed of the shaft; wherein the speed sensor module includes an outer portion having a first bore aligned on the shaft axis, an intermediate portion having a second bore aligned on the shaft axis, an inner portion aligned on the shaft axis, a proximal end of the speed sensor module, and a distal end of the speed sensor module; and a diffuser assembly including a cylindrical assembly for ducting a first portion of the cooling air to an inlet side of the fan and for communicating a second portion of the cooling air directly to a discharge side of the fan without passing the inlet side, wherein the proximal end of the speed sensor module is coupled to the air cycle machine and the distal end of the speed sensor module is coupled to the diffuser assembly.