Aircraft and aircraft blower systems are described. The blower systems include a shaft, a motor having a stator and a rotor, the rotor being operably coupled to the shaft, a fan operably coupled to the shaft and configured to be driven by rotation of the shaft, one or more bearings arranged along the shaft, and a high pressure cooling source configured to supply high pressure air to the one or more bearings.

A vehicle cabin air temperature controller includes a two-position three-way solenoid valve with one inlet to take in coolant from a pump, a first outlet to supply a cooling leg, and a second outlet to supply a bypass leg. The vehicle cabin air temperature controller also includes a controller to control flow of the coolant via the first outlet and the second outlet of the solenoid valve, and a cabin air heat exchanger to obtain an input coolant based on the control of the flow via the first outlet and the second outlet and to provide cooled cabin air to the vehicle cabin. The control of the flow of the coolant via the first outlet and the second outlet controls a temperature of the input coolant.

An environmental control system of an aircraft includes a compressing device including a compressor and a turbine configured to receive a flow of first medium sequentially. The compressing device additionally includes a second turbine configured to receive a flow of second medium distinct from the first medium. A dehumidification system is arranged in fluid communication with the turbine and a bypass valve is configured to divert the flow of the first medium output from the compressor around the turbine.

This disclosure describes techniques for increasing wetting current for an electromechanical switch. In one example application, an aircraft may include one or more valves used to control the temperature of aircraft interior. The valves may include one or more valve position switches to indicate certain valve positions, e.g. fully open, fully closed, fifty percent open, and so on. In some examples, the valve position switches may receive current at electromechanical contacts of the switch that is less than the wetting current. The techniques of this disclosure provide additional wetting current at the time the switch contacts close to improve reliability of the valve position switches. In some examples, an analog to digital converter circuit may be configured to provide the additional wetting current to the switch.

A Passenger Service Unit (PSU) including an outer plate having an aperture therethrough. The outer plate has symmetry about at least one outer plate axis. The outer plate is configured to be couplable to a passenger compartment at a first position and a second position nonadjacent to the first position. The PSU also includes a first insert configured to be coupled to the outer plate and includes at least one component to be manipulated by a passenger in the passenger compartment. The first insert has symmetry about at least one insert axis and at least a portion of the first inner plate fits within the aperture. Further, the inner plate is rotatable with respect to the outer plate such that the inner plate can be coupled to the outer plate in a first orientation and a second orientation offset by substantially 180 degrees from the first orientation.

A Passenger Service Unit (PSU) including an outer plate having an aperture therethrough. The outer plate has symmetry about at least one outer plate axis. The outer plate is configured to be couplable to a passenger compartment at a first position and a second position nonadjacent to the first position. The PSU also includes a first insert configured to be coupled to the outer plate and includes at least one component to be manipulated by a passenger in the passenger compartment. The first insert has symmetry about at least one insert axis and at least a portion of the first inner plate fits within the aperture. Further, the inner plate is rotatable with respect to the outer plate such that the inner plate can be coupled to the outer plate in a first orientation and a second orientation offset by substantially 180 degrees from the first orientation.

An outer panel-mediated cooling system includes: an outer shell including an outer panel, an inner panel located inward of the outer panel, and a heat-insulating layer located between the outer and inner panels; a cooling chamber that is located between the outer and inner panels and in which a gas releases heat outside through the outer panel and is thus cooled; a circulation loop in which a heat medium circulates, the circulation loop including a heating section located inward of the inner panel to heat the heat medium and a cooling section located in the cooling chamber to cool the heat medium; a flow path-forming structure located in the cooling chamber to form a circulation path for the gas; and a fan located in the cooling chamber to exert a drive force on the gas to allow the gas to circulate in the circulation path.

A system and method include a seat assembly including a seat duct fluidly coupled to one or more air outlets. An air delivery manifold is underneath the seat assembly. The air delivery manifold includes a first outlet port. The seat duct is fluidly coupled to the first outlet port. Air is delivered to the one or more air outlets via the air delivery manifold.

A fluid diverting air inlet includes an intake opening through an outer surface of an enclosure for receiving air flowing outside the outer surface. The intake opening ramps downwardly below the outer surface to define an intake passageway. An air diversion device is formed by lateral sidewalls of the intake opening that extend vertically above the outer surface. The lateral sidewalls converge together at an upstream end of the air inlet, and the lateral sidewalls diverge apart towards a downstream end of the air inlet. Flanges extend outwardly from the tops of the lateral sidewalls such that divided air passageways for boundary layer fluids are formed on each side of the air diversion device. The sidewalls and flanges are integrated with the air inlet such that fluid moving immediately adjacent the outer surface of the enclosure is diverted around the air inlet to avoid ingestion into the intake opening.

A fluid diverting air inlet includes an intake opening through an outer surface of an enclosure for receiving air flowing outside the outer surface. The intake opening ramps downwardly below the outer surface to define an intake passageway. An air diversion device is formed by lateral sidewalls of the intake opening that extend vertically above the outer surface. The lateral sidewalls converge together at an upstream end of the air inlet, and the lateral sidewalls diverge apart towards a downstream end of the air inlet. Flanges extend outwardly from the tops of the lateral sidewalls such that divided air passageways for boundary layer fluids are formed on each side of the air diversion device. The sidewalls and flanges are integrated with the air inlet such that fluid moving immediately adjacent the outer surface of the enclosure is diverted around the air inlet to avoid ingestion into the intake opening.