DE9104935U1 - Drainage system for the drain mass of a drain mass producing unit - Google Patents

Description

Rauno Haatanen 2000 Hamburg 1

Drainage system for the drain mass of a drain mass producing unit

The invention relates to a drainage system comprising a drainage mass producing unit (in particular a toilet in a vehicle), a device for generating negative pressure, an intermediate container and a collecting container, which are connected to one another via pipes with valves.

In such a known drainage system (DE-OS 39 32 893), the intermediate container is evacuated via the device for generating negative pressure. The air or gases removed from the intermediate container are released into the environment. Furthermore, the collecting container is also evacuated so that the drainage mass can be brought into the collecting container via the intermediate container.

The known system requires a number of devices that make the entire system not only cumbersome and prone to failure, but also very expensive. Since the collection container has a relatively large volume, the vacuum pump must also be relatively large. In addition, due to this volume, the unit that produces the waste mass can only be used at relatively long intervals.

The invention is based on the object of making the drainage system of the type mentioned at the beginning simpler and, moreover, of simplifying it in terms of the technically required effort.

This is achieved by the features specified in the characterising part of claim 1.

First of all, it is important that a relatively small vacuum generating device can be used, since only the relatively small volume of the intermediate container, a few liters, has to be evacuated. If the intermediate container has been sufficiently pressurized, the drain mass can be sucked in and pressed out of the intermediate container into the collecting container by introducing compressed air. In addition to the lower expenditure with regard to the vacuum pump, the drain system according to the invention allows the drain mass producing unit to be used for relatively short periods of time.

In an advantageous embodiment of the invention, all pipes, all valves, the intermediate container and the vacuum device, with the exception of the collecting container and the pipe leading to it, are located in the immediate vicinity of the toilet bowl, i.e. either in the area of the seat or underneath the bowl. This is of particular importance when it comes to installations in vehicles, where space problems naturally arise.

The invention is particularly suitable for rail-bound vehicles, but also, for example, for intercity buses.

The invention is explained by way of example with reference to the drawing.

The only figure in the drawing shows a schematic drainage system according to the invention.

In the figure, 1 shows a toilet bowl which is equipped with a known water flushing system (not explained in more detail). At the outlet of the toilet bowl 1 there is a valve 5 which leads via a line 7 to an intermediate container 17 in which a vacuum device is arranged. The vacuum device 6 is designed in such a way that the interior of the intermediate container 17 can be quickly evacuated, with the extracted gas reaching the collecting container 9 via a - then open - valve 8 and the line 10.

Furthermore, a line 15 leads into the collecting tank 17 via a valve 20, which can be connected to an existing compressed air network or a compressed air generator.

The drawing shows schematically control lines for the valves as well as measuring and command lines (in unbroken lines) that lead to a control system.

If waste material is to be removed from the toilet bowl 1, the actual flushing process is initiated, with the valve 5 closed. Before this, the vacuum pump 6 has already evacuated the interior of the intermediate container 17, with the valves 20 and 8 being closed.

Next, the valve 5 is opened so that the drain mass passes through the line 7 into the intermediate container 17 due to the negative pressure.

Then the valve 5 is closed and the valves 8 and 20 are opened so that the compressed air pushes the discharge mass from the intermediate container 17 into the collecting container 9.

The collection container 9 can have a volume of 100 liters or more. The intermediate container 17 can, for example, have a content of several liters. For the rinsing process itself, the drainage system according to the invention only requires fractions of a liter of rinsing water.

Claims (2)

Patent Attorneys Konigstraße 28 D-2000 Hamburg 50 DIEHL · GLAESER HILTL & PARTNER Patent Attorneys European Patent Attorneys HAMBURG* MUNICH Law firm/Office Hamburg Konigstrasse 28 D-2000 Hamburg Dr. Hermann O. Th. Diehl, graduate physicist Joachim W. Glaeser, graduate engineer* Dr. Elmar HiItI Graduate Chemist
Erich Burger Graduate Engineer 23.4.1991 H. 31548/91 20/yes Protection claims 1. Drainage system, comprising a drain mass producing unit (1) (in particular a toilet in a vehicle), a device (6) for generating negative pressure, an intermediate container (17) and a collecting container (9), which are connected to one another via pipes (7, 10, 15) with valves (5, 8, 20), characterized in that the device (6) for generating negative pressure evacuates or places negative pressure in the intermediate container (7) via the line ¹ (10) leading into the collecting container (9) when the valve (5) to the drain mass producing unit is closed, and that a valve (20) is arranged in a compressed air supply line (15) which, in the open position and when the valve (5) to the drain mass producing device (1) is closed, causes the drain mass sucked into the intermediate container (7) to be pressed into the collecting container (9). phone Teletex fpleCopywriter Deutsche Bank AG Postgiro office Bayer. Vereinsbank Telephone 402172 --karp Facsimile Mainborg Hamburg Munich (0 40) 3812 33 telex (0 40)3 80 92 88 Account No. 6 512 131 Account No. 852 62-202 Account No. 46 515 080 (0 40) 3812 34 17402172 Bank code 200 700 00 Bank code 200 100 20 Bank code 700 202 70 2. Drainage system according to claim 1, characterized in that all valves (5, 8, 20), all lines (7, 15) except for the line (10) leading to the collecting container (9), the intermediate container (17) and the device (6) for generating negative pressure are housed on the unit (1) producing the drainage mass or in the seat of the toilet bowl (1).