Air conditioning system for automotive vehicles

Claim 1

In an air conditioner for cooling a motor vehicle passenger compartment, said vehicle having an engine with means emitting hot exhaust gases therefrom, a closed refrigerant fluid system containing a refrigerant fluid and utilizing the heat of said exhaust gases for powering said air conditioner comprising condenser means for liquifying said refrigerant fluid, evaporator means for vaporizing said refrigerant fluid and for effecting cooling of air passed therethrough by heat transfer from said air to said fluid, means for passing cooling air through said evaporator means and to said passenger compartment, generator means receiving said fluid in liquified form for effecting heat transfer from said engine exhaust gases to said liquified fluid to effect evaporation thereof, means for passing said exhaust gases through said generator means, ejector means located within said closed refrigerant system receiving evaporated fluid from said generator means and passing said fluid to said condensor means, recirculation means for passing liquified fluid from said condensor means partially to said evaporator means and partially to said generator means, and means for introducing evaporated fluid from said evaporator means into said ejector means to effect entrainment of said introduced fluid into the evaporated fluid passed by said ejector means from said generator means to said condensor means, said ejector means comprising means defining a low pressure side thereof at which said evaporated fluid from said evaporator means is introduced into said ejector means, and means defining an acceleration zone in which the velocity of entrained fluid is accelerated.