Abstract: A system for air-conditioning an aircraft cabin includes an air conditioning unit connected to a central mixer, a first recirculation system designed to remove exhaust air from a first aircraft cabin region and connected to the central mixer, and a second recirculation system designed to remove exhaust air from a second aircraft cabin region and connected to a local mixer. A control device is designed to control the second recirculation system to reduce an air volume flow being removed from the second aircraft cabin region when shifting from a first operating state (e.g., normal operation) to a second operating state (e.g., defined operating situations such as when quick cooling is desired). The air volume being removed from the first aircraft cabin region may be increased accordingly in the second operating state.

Abstract: An aircraft air-conditioning system includes an air-conditioning unit that is connected by a main fresh-air line to a mixer in order to supply the mixer with fresh air at a desired low temperature. A fresh-air branch line that is connected upstream of the mixer to the main fresh-air line has a flow cross section that is smaller than a flow cross section of the main fresh-air line. In a region of connection of the main fresh-air line to the fresh-air branch line the main fresh-air line and the fresh-air branch line are so formed that a main fresh air flow flowing through the main fresh-air line is deflected, while a fresh air branch flow flowing through the fresh-air branch line experiences substantially no deflection.

Abstract: A particle separator comprises a pipeline that allows a fluid to flow in a curved direction of flow. The particle separator includes an inlet region, a curved deflection region, which in the direction of flow follows on from the inlet region, with an inside wall and an outside wall, and a delimitation body. The delimitation body at least in some sections extends between the inside wall and the outside wall in the interior of the deflection region and is curved in the same direction as the deflection region.

Abstract: In a method for controlling an aircraft air conditioning system, during normal operation of the aircraft, the supply of conditioned air from the aircraft air conditioning system to an aircraft region to be air conditioned is controlled such that the conditioned air is evenly distributed in the aircraft region to be air conditioned. During a predetermined operational phase of the aircraft, the supply of conditioned air from the aircraft air conditioning system to the aircraft region to be air conditioned is controlled such that the conditioned air is distributed only in a selected portion of the aircraft region to be air conditioned.

Abstract: A method and a device determines an air mass flow flowing through a ram air channel having disposed therein a feed device adapted in a first operating state of the ram air channel to feed air through the ram air channel and further adapted in a second operating state of the ram air channel to be set in rotation by an air mass flow flowing through the ram air channel. The method includes the step of detecting an actual operational characteristic of the feed device that is characteristic of the air mass flow flowing through the ram air channel in the second operating state of the ram air channel as well as the step of determining the air mass flow flowing through the ram air channel on the basis of the detected actual operational characteristic of the feed device.

Abstract: In a method for controlling an aircraft air conditioning system, a heating or cooling demand of an aircraft region to be air conditioned is determined. A volume flow of recirculation air discharged from the aircraft region to be air conditioned and a volume flow of compressed air into a mixing chamber of the aircraft air conditioning system is controlled such that the heating or cooling demand of the aircraft region to be air conditioned is met, while the volume flow of compressed air into the mixing chamber of the aircraft air conditioning system is minimized.

Abstract: An aircraft conduit monitoring system includes conduit that conducts gas from a source to a point of application. A flow sensing device and a pressure sensing device are provided within the conduit. At least one set value of a gas mass flow rate and at least one set value of a pressure are sensed in a learning mode of operation. The set values are compared with sensed actual values in the normal mode of operation. A gas volume flow rate can also be sensed and processed instead of a gas mass flow rate.

Abstract: An arrangement is provided for de-icing pipeline connections of an aircraft, which are connected to all fresh air outlets of an air conditioner, whose construction includes, but is not limited to the functions of multiple turbines and heat exchangers, having a first pipeline, which is connected to a first turbine, and a second pipeline, which is connected to a second turbine, the two pipelines, which are each connected downstream from the two turbines and to which process air is fed at the turbine outlets, being connected at the pipe ends and being continued using a third pipeline. The arrangement is characterized in that a first hot air source is fed hot fresh air from a bleed air system of the aircraft and is connected at its outlet to a fourth pipeline, into which temperature-reduced fresh air is fed from the hot air source.

Abstract: A device for mixing fresh air and heating air in a ventilation system of an aircraft includes a fresh air inlet, a heating air supply body for supplying the heating air into the device, and a mixed air outlet for delivering mixed fresh air and heating air from the device. The heating air supply body includes a first portion and a second portion which constitute a flow resistance to the fresh air. The second portion is formed as a closed hollow body with a plurality of heating air supply openings and is connected to the first portion at a downstream end of the first portion, viewed in the flow direction of the heating air. Advantageously, the first portion of the heating air supply body is of streamlined shape.

Abstract: An arrangement is provided for de-icing pipeline connections of an aircraft, which are connected to all fresh air outlets of an air conditioner, whose construction includes, but is not limited to the functions of multiple turbines and heat exchangers, having a first pipeline, which is connected to a first turbine, and a second pipeline, which is connected to a second turbine, the two pipelines, which are each connected downstream from the two turbines and to which process air is fed at the turbine outlets, being connected at the pipe ends and being continued using a third pipeline. The arrangement is characterized in that a first hot air source is fed hot fresh air from a bleed air system of the aircraft and is connected at its outlet to a fourth pipeline, into which temperature-reduced fresh air is fed from the hot air source.

Abstract: A system for cooling an aircraft zone includes a mixing chamber (18) which is connected to an air-conditioning assembly (12a, 12b) for making cool air available and/or to a recirculated-air conveying device (20a, 20b) for supplying recirculated air into the mixing chamber (18). The system (10) further includes an aircraft-side air-distribution system (23) which includes at least one line (32) connecting the mixing chamber (18) to the aircraft zone to be cooled and also at least one line (28a, 28b) that is connectable to an aircraft-external air-generating assembly (26a, 26b, 26c, 26d) in order to route air made available by the aircraft-external air-generating assembly (26a, 26b, 26c, 26d) into the aircraft-side air-distribution system (23).

Abstract: The invention relates to an aircraft conduit monitoring system comprising a conduit that conducts gas from a source to a point of application. A flow sensing device and a pressure sensing device are provided within the conduit. At least one set value of a gas mass flow rate and at least one set value of a pressure are sensed in a learning mode of operation. Said set values are compared with sensed actual values in the normal mode of operation. A gas volume flow rate can also be sensed and processed instead of a gas mass flow rate.

Abstract: A system (10) for air conditioning an aircraft cabin (12) comprises an air conditioning unit (14) connected to a central mixer (16) in order to supply the central mixer (16) with air at a desired low temperature. A first recirculation system (18) is designed to remove exhaust air from a first aircraft cabin region (12a) and is connected to the central mixer (16) in order to lead the exhaust air from the first aircraft cabin region (12a) into the central mixer (16). A second recirculation system (24) is designed to remove exhaust air from a second aircraft cabin region (12b) and is connected to a local mixer (20, 22) in order to lead the exhaust air from the second aircraft cabin (12b) into the local mixer (20, 22). The local mixer (20, 22) is connected to the central mixer (16) in order to supply mixed air from the central mixer (16) into the local mixer (20, 22).

Abstract: A system (10) for air-conditioning an aircraft cabin (12) comprises an air conditioning unit (14) connected to a central mixer (16) in order to supply the central mixer (16) with air at a desired low temperature. A first recirculation system (18) is designed to remove exhaust air from a first aircraft cabin region (12a) and is connected to the central mixer (16) in order to lead the exhaust air from the first aircraft cabin region (12a) into the central mixer (16). A second recirculation system (24) is designed to remove exhaust air from a second aircraft cabin region (12b) and is connected to a local mixer (20, 22) in order to lead the exhaust air from the second aircraft cabin (12b) into the local mixer (20, 22). The local mixer (20, 22) is connected to the central mixer (16) in order to supply mixed air from the central mixer (16) into the local mixer (20, 22).

Abstract: A system (10) for cooling an aircraft region comprises an air-conditioning unit (12a, 12b) for providing cool air, a circulating air conveying device (20a, 20b), and a mixing chamber (18) which is connected to the air conditioning unit (12a, 12b) via an air distribution line (16a, 16b) and to which circulating air can be fed by the circulating air conveying device (20a, 20b). An inlet line (28a, 28b) which is connected to an aircraft-side connection (24a, 24b, 24c, 24d) for an aircraft-external air unit (26a, 26b, 26c, 26d) opens into the air distribution line (16a, 16b) connecting the air conditioning unit (12a, 12b) to the mixing chamber (18).

Abstract: A system (10) for conveying recirculation air from an aircraft cabin comprises a plurality of conveying devices (12a-12j) which are arranged in a manner distributed along an aircraft cabin region (14). A control device (16) is configured to control the conveying devices (12a-12j) in the normal operation of the system (10) in such a manner that each conveying device (12a-12j) removes a predetermined air volume flow from the aircraft cabin region (14). The control device (16) is furthermore configured to control, in the event of a failure of a conveying device (12c), at least some of the remaining still functional conveying devices (12a, 12b, 12d-12j) in such a manner that the entire air volume flow removed from the aircraft cabin region (14) by the remaining still functional conveying devices (12a, 12b, 12d-12j) is increased by an amount corresponding to an air volume flow amount removed from the aircraft cabin region (14) by the failed conveying device (12c) in the normal operation of the system (10).

Abstract: The invention relates to a device and a method for distributing air in a cargo aircraft. The cargo aircraft has an air distribution system (10) which is connected to at least one cargo deck. The air distribution system comprises a source (12, 14, 16, 18) for bleed air, at least one so-called air conditioning unit (28, 38) for treating the bleed air, a mixing unit (32) which receives treated bleed air from the air conditioning unit (28, 38) and delivers it to the at least one cargo deck, and at least one shut-off valve (58, 60, 62, 64) between the mixing unit (32) and the cargo deck in order to interrupt or completely release the air supply to the cargo deck. In order to reduce the bleed air requirement, a cockpit switch (82, 84, 86, 88) co-operating with the shutoff valve is provided, the operation of which switch causes the at least one shutoff valve (58, 60, 62, 64) to take up an intermediate position.

Abstract: An aircraft air-conditioning system (10) comprises an air-conditioning unit (12) that is connected by a main fresh-air line (16) to a mixer (18) in order to supply the mixer (18) with fresh air at a desired low temperature. A fresh-air branch line (20) that is connected upstream of the mixer (18) to the main fresh-air line (16) has a flow cross section that is smaller than a flow cross section of the main fresh-air line (16).

Abstract: An arrangement is provided for de-icing pipeline connections of an aircraft, which are connected to all fresh air outlets of an air conditioner, whose construction includes, but is not limited to the functions of multiple turbines and heat exchangers, having a first pipeline, which is connected to a first turbine, and a second pipeline, which is connected to a second turbine, the two pipelines, which are each connected downstream from the two turbines and to which process air is fed at the turbine outlets, being connected at the pipe ends and being continued using a third pipeline. The arrangement is characterized in that a first hot air source is fed hot fresh air from a bleed air system of the aircraft and is connected at its outlet to a fourth pipeline, into which temperature-reduced fresh air is fed from the hot air source.

Abstract: The invention relates to a device (30) for mixing fresh air (2) and heating air (4) which comprises a fresh air inlet (32, 42), a heating air supply body (33, 43) for supplying the heating air (4) into the device (30, 40), and a mixed air outlet (36, 46) for delivering mixed fresh air and heating air (6) from the device (30, 40), wherein the heating air supply body (33, 43) comprises a first portion (35, 45) and a second portion (37, 47) which constitute a flow resistance to the fresh air (2), and wherein the second portion (37, 47) is formed as a closed hollow body with a plurality of heating air supply openings (38, 48) and is connected to the first portion (35, 45) at its downstream end, viewed in the flow direction of the heating air. The invention is characterised in that the first portion (35, 45) of the heating air supply body (33, 43) is of streamlined formation. The invention also relates to the use of a device of this kind in a ventilation system installed on board of an aircraft.