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US 8,769,731 B2Granted
Flushing device and flushing method for a vacuum toilet
AssigneeAirbus Operations GmbH
InventorChristian Seibt
Life of this patent
Estimating the term…
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 optimization of the flushing medium can be carried out.
Claims14
A vacuum toilet comprising
- a first volume;
- a second volume;
- and
- a nozzle arrangement;
- wherein the first volume comprises a first opening for supplying a medium to be disposed of, wherein the first opening can be closed off in a negative-pressure-proof manner, and a drain, to which a negative-pressure-generating device can be connected, for removing the medium to be disposed of;
- wherein the second volume comprises a reservoir for a flushing medium;
- wherein the nozzle arrangement includes a nozzle that comprises a nozzle outlet, wherein the nozzle arrangement connects the second volume to the first volume such that the nozzle outlet is directed to the first volume, and the flushing medium, by a pressure differential between the first volume and the second volume, through the nozzle reaches the first volume from the second volume in a directional manner, wherein the pressure differential is caused by negative pressure generated in the first volume;
- and
- wherein the first volume comprises an interior wall with a curvature that is at least in part concave, and the nozzle outlet is aligned such that the flow of the flushing medium travels laminarly along the concave curvature, and
- wherein the geometry of the nozzle arrangement is configured such that the hydrodynamic boundary layer on the toilet bowl is coverable by a laminar flow up to the drain.
7 more elements
An aircraft comprising a vacuum toilet, the vacuum toilet comprising:
- a first volume;
- a second volume;
- and
- a nozzle arrangement;
- wherein the first volume comprises a first opening for supplying a medium to be disposed of, wherein the first opening can be closed off in a negative-pressure-proof manner, and a drain, to which a negative-pressure-generating device can be connected, for removing the medium to be disposed of;
- wherein the second volume comprises a reservoir for a flushing medium;
- wherein the nozzle arrangement includes a nozzle that comprises a nozzle outlet, wherein the nozzle arrangement connects the second volume to the first volume such that the nozzle outlet is directed to the first volume, and the flushing medium, by a pressure differential between the first volume and the second volume, through the nozzle reaches the first volume from the second volume in a directional manner, wherein the pressure differential is caused by negative pressure generated in the first volume;
- and
- wherein the first volume comprises an interior wall with a curvature that is at least in part concave, and the nozzle outlet is aligned such that the flow of the flushing medium travels laminarly along the concave curvature, and
- wherein the geometry of the nozzle arrangement is configured such that the hydrodynamic boundary layer on the toilet bowl is coverable by a laminar flow up to the drain.
7 more elements
Dependencies are inferred from the claim text.