초록

The air supply to an aircraft is provided by air conditioning apparatus operable in a powered bootstrap simple cycle or bootstrap cycle mode. Logic circuitry selects and activates the system to that mode best suited to existing conditions.

대표청구항 ▼

A multimode cabin air conditioning system comprising a turbine; a compressor; said turbine and compressor having a common shaft; drive means being actuable to drive said shaft; heat exchanger means for cooling air passed therethrough and; a source of high pressure fresh air; wherein the improvement

A multimode cabin air conditioning system comprising a turbine; a compressor; said turbine and compressor having a common shaft; drive means being actuable to drive said shaft; heat exchanger means for cooling air passed therethrough and; a source of high pressure fresh air; wherein the improvement comprises: coupling means for interconnecting said turbine, compressor, heat exchanger means, source of high pressure fresh air and cabin in a predetermined arrangement responsive to each mode of conditioning system operation, said coupling means being operable in a powered bootstrap mode to couple: (a) output air from said cabin to the input of said compressor; (b) the output of said compressor through said heat exchanger means to the input of said turbine; and (c) the output of said turbine to said cabin for supplying recirculated air thereto; said coupling means being operable in a simple cycle mode to couple: (a) output air from said cabin to the input of said compressor; (b) the output of said compressor through said heat exchanger to supply a predetermined portion of recirculated air to said cabin; (c) said source of high pressure fresh air to the input of said trubine; and (d) the output of said turbine to said cabin for supplying a predetermined portion of fresh air thereto; and drive coupling means operable in said powered bootstrap mode for coupling said drive means to said shaft for driving the same, the drive coupling means otherwise effectively decoupling said drive means from said shaft.