Patent ID: 11912418
Assignee: GREG LONGE
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An aircraft air conditioning system comprising:
a cabin exhaust conduit system coupled to a plurality of exhaust vents located in a passenger cabin of the aircraft to remove cabin exhaust air from the passenger cabin;
a ram air intake to intake ram air from outside the aircraft;
a heat exchanger coupled to receive a first subflow of the ram air and configured to preheat or precool the first subflow of ram air to produced pretreated ram air;
a heat recovery unit to receive the cabin exhaust air from the passenger cabin via the cabin exhaust conduit system and to receive the pretreated ram air, the heat recovery unit configured to use the cabin exhaust air to further heat the pretreated ram air and to output conditioned ram air to be introduced into the passenger cabin;
an air conditioning pack unit to receive the conditioned ram air to be introduced into the passenger cabin from the heat recovery unit and to provide further temperature conditioning of the conditioned ram air to be introduced into the passenger cabin, to produce a first conditioned air stream;
a mixing box to receive the first conditioned air stream from the pack unit and to receive a second subflow of the ram air, wherein the mixing box is configured to mix the first conditioned air stream with the second subflow of the ram air to produce a second conditioned air stream; and
a cabin fresh air conduit system to convey the second conditioned air stream to a plurality of supply vents located in the passenger cabin to inject the second conditioned air stream into the passenger cabin, wherein only fresh air is introduced into the passenger cabin as ventilation air.