Patent ID: 8099973
Filing Date: 2012-01-24
Classification: B64D

Abstract:
1. An environmental control system for conditioning a compartment of a vehicle containing warm air, the system including a turbine over which hot pressurized air is expanded and cooled to provide air which is cooler and at higher-pressure than warmer lower pressure air from the compartment, and a mixing device to which the higher-pressure cooler air from the turbine and lower pressure warmer air from the compartment are mixed, wherein the mixing device comprises a jet pump which includes an inlet section, an outlet section, a diffuser section and a mixing section, said inlet section including a primary air inlet connected for receiving the higher-pressure cooler air from the turbine and a secondary air inlet adapted to be connected for receiving lower pressure warmer air from the compartment, said mixing section including a plurality of separated mixing chambers, and said diffuser section including diffusers which receive mixed air from each of said mixing chambers, and said outlet section receiving mixed air from said diffuser section and conveying the mixed air to a mixed air outlet which is adapted to be connected in use to the compartment, said inlet section including for each of the plurality of mixing chambers a primary nozzle for introducing primarily the higher-pressure air from said primary air inlet to a respective mixing chamber, and a secondary nozzle for introducing primarily the lower pressure air from said secondary air inlet to a respective mixing chamber.