Abstract: A noise reduction unit for inserting in a vacuum suction drain is adapted to be flown through by a material to be conveyed through the vacuum suction drain and comprises an inlet section with a first diameter, a middle section with a second diameter and an outlet section with a third diameter. The middle section is adapted to affect a flow velocity reduction of the material to be conveyed such that the noise level arising during the conveying process is being reduced.

Abstract: A vacuum-operated sanitary device, in particular a vacuum toilet, comprising a bowl and a flushing device, with the flushing device comprising a nozzle arrangement with a nozzle inlet of a first cross section, a nozzle outlet of a second cross section, which nozzle outlet is directed onto an interior wall of the bowl, and a nozzle duct of a third cross section, which nozzle duct connects the nozzle inlet with the nozzle outlet, wherein the third cross section is smaller than both the first cross section and the second cross section; a first delivery device connected to the nozzle inlet, wherein the first delivery device is designed to deliver a first flushing medium; and a second delivery device that opens into the nozzle duct, wherein the second delivery device is designed to deliver a second flushing medium.

Abstract: At least one energy storage system is provided for receiving and releasing at least a part of the converted kinetic energy from a landing aircraft. The system has a high degree of multiple utilisation and enables, for example, manoeuvring of a landed aircraft on the taxiway independently of the engines, where the aircraft is substantially moved with the braking energy recovered during the landing process. As a result of the main engines no longer being required for manoeuvring, there is a considerable potential for saving energy and the use of motor-operated tow vehicles is eliminated. The apparatus also contributes in the sense of a “green” and economical technology to saving aircraft fuel and better fulfils future requirements of airports, particularly with a view to noise and pollutant reduction. In addition, the invention has as its subject matter a method for recovering braking energy of an aircraft.

Abstract: The system for flushing a vacuum toilet contains a urinal basin having a drain, which is connected to a drain line, and a bypass line, into which the drain line discharges, and which is connectable via a suction valve to a vacuum system. By generating a main air current in the bypass line and a secondary air current in the drain line, a noise emission in the area of the urinal basin may be significantly reduced.

Abstract: An inspection device is provided to monitor hygienic conditions of a space unit for a vehicle. The vehicle includes, but is not limited to, an inspection device, the use of an inspection device, and a method to assure hygienic conditions in a vehicle. In order to optimize assuring hygienic conditions in interior spaces on board a vehicle an inspection device is provided that includes, but is not limited to, an optical detection device. The optical detection device generates electromagnetic radiation to irradiate a surface to be cleaned, and renders visible soiling that, in visible light, is invisible to the human eye. The optical detection device is permanently installable on an interior lining.

Abstract: A system for flushing a vacuum toilet, includes a drain that is connected to a drain conduit, which vacuum toilet is connectable to a vacuum system by way of a suction valve. With the use of a combined valve including, for example, a flow-optimised intermediate storage device, inflow nozzle, bypass conduit with silencer and hose odor seal, the flow noises at the urinal bowl drain, urinal bowl overflow and upper end of the bypass conduit can be effectively suppressed. With the combination disc valve or the shut-off valve and suction valve, during the suction process the air stream is only drawn through the bypass conduit with a special odor seal and silencer.

Abstract: A vacuum waste-water system sound-absorber includes a connection stub for a vacuum waste-water system and an aspiration air duct, wherein the aspiration air duct is radially delimited by a pipe, wherein the pipe is delimited at an interior of the aspiration air duct by an internal wall and is delimited at an exterior of the aspiration air duct by an external wall, wherein the internal wall comprises openings in a radial direction, wherein the external wall comprises openings in radial direction, wherein a sound-absorbent material is arranged between the internal wall and the external wall.

Abstract: A vacuum waste-water system sound-absorber includes a connection stub for a vacuum waste-water system and an aspiration air duct, wherein the aspiration air duct is radially delimited by a pipe, wherein the pipe is delimited at an interior of the aspiration air duct by an internal wall and is delimited at an exterior of the aspiration air duct by an external wall, wherein the internal wall comprises openings in a radial direction, wherein the external wall comprises openings in radial direction, wherein a sound-absorbent material is arranged between the internal wall and the external wall.

Abstract: A monitoring device and method are provided for monitoring a vacuum toilet, as well as a personal transport vehicle, in particular an aircraft, which uses a monitoring device for vacuum toilets. The monitoring device has a position detector for detecting the position of a toilet lid, a mechanical latching device and a flushing control unit. The latching device is designed to latch the toilet lid in an open position based on the weight of a person acting on a toilet seat. The flushing control unit is further designed to control the flushing operation based on the toilet lid position, and to block the flushing operation upon detection of the toilet lid in the open position. This makes it possible to improve both the comfort and hygienic conditions for the toilet user while using the vacuum toilet.

Abstract: The invention relates to an odour seal for a vacuum toilet drain system whose cross section in the state of no throughflow tapers off in such a way in the downstream direction that the interior walls on the downstream end of the odour seal rest against each other so that the odour seal in a downstream direction allows throughflow while in the opposite direction it blocks throughflow, wherein the downstream end of the odour seal is closed in the state of throughflow and no throughflow of the odour seal. Furthermore, the invention relates to a drainage device comprising such an odour seal and a sieve which is arranged upstream of the odour seal. Moreover, the invention relates to a vacuum toilet system for an aircraft, comprising such an odour seal or a drainage device.

Abstract: A vacuum-operated sanitary device, in particular a vacuum toilet, comprising a bowl and a flushing device, with the flushing device comprising a nozzle arrangement with a nozzle inlet of a first cross section, a nozzle outlet of a second cross section, which nozzle outlet is directed onto an interior wall of the bowl, and a nozzle duct of a third cross section, which nozzle duct connects the nozzle inlet with the nozzle outlet, wherein the third cross section is smaller than both the first cross section and the second cross section; a first delivery device connected to the nozzle inlet, wherein the first delivery device is designed to deliver a first flushing medium; and a second delivery device that opens into the nozzle duct, wherein the second delivery device is designed to deliver a second flushing medium.

Abstract: A system for flushing a vacuum toilet in an aircraft, with a bowl drain for removing toilet waste water from a bowl, a drain line, a bypass flow line for feeding-in air, a drainage valve and a waste water line. The bowl drain and the bypass flow line are connectable to the drain line, and the drainage valve on the input side is connectable to the drain line, and on the output side is connectable to a waste water line. In an implementation of the vacuum toilet as a vacuum urinal, the system may provide either water flushing or waterless flushing.

Abstract: A vacuum toilet and a method for operating a vacuum toilet, wherein generating negative pressure to remove solids by suction is also used for generating a desired flushing medium flow. To this effect, if necessary, guiding devices are used which influence a flow upstream of a nozzle outlet and downstream of a nozzle outlet such that flow optimisation of the flushing medium can be carried out.

Abstract: A draining system having an odor seal for a vacuum toilet drain system in which a flexible hose acts as an odor seal. As a result of the flexible hose, propagation of odors can be prevented when the hose collapses flat, for example as a result of its intrinsic weight, and consequently there is no longer a flow-through cross section, wherein, however, drainage of liquids remains possible.

Abstract: A system for flushing a vacuum toilet, includes a drain that is connected to a drain conduit, which vacuum toilet is connectable to a vacuum system by way of a suction valve. With the use of a combined valve including, for example, a flow-optimised intermediate storage device, inflow nozzle, bypass conduit with silencer and hose odor seal, the flow noises at the urinal bowl drain, urinal bowl overflow and upper end of the bypass conduit can be effectively suppressed. With the combination disc valve or the shut-off valve and suction valve, during the suction process the air stream is only drawn through the bypass conduit with a special odor seal and silencer.

Abstract: A sealing device for vacuum urinals in aircraft, with a container having an upper and lower opening cross section, and with a spherical closure in the form of a sphere. The diameter of the spherical closure is greater than the diameter of the lower opening cross section, and the spherical closure can be accommodated by the container. The spherical closure can further be moved from a sealed setting to an open setting, and from the open setting to the sealed setting, wherein the lower opening cross section is sealed by the spherical closure in the sealed setting.

Abstract: The system for flushing a vacuum toilet contains a urinal basin having a drain, which is connected to a drain line, and a bypass line, into which the drain line discharges, and which is connectable via a suction valve to a vacuum system. By generating a main air current in the bypass line and a secondary air current in the drain line, a noise emission in the area of the urinal basin may be significantly reduced.