Baths – closets – sinks – and spittoons – Flush closet – Bowl
Patent
1994-12-09
1996-05-14
Fetsuga, Robert M.
Baths, closets, sinks, and spittoons
Flush closet
Bowl
4661, E03D 1100
Patent
active
055155553
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for controlling the processes that take place in the operation of a vacuum toilet, comprising a control computer installed below the seat of a toilet, time-controlled assemblies such as vacuum and compressed air generators with associated closing and opening valves, and sensors for temperature, pressure, and flow.
In the operation of a vacuum toilet a number of processes are carded out which must be precisely coordinated with each other in time. What are involved are essentially flushing and emptying processes. In order for it to be possible to carry out these flushing and emptying processes vacuum or pressure generators must be activated in order to make the necessary motive forces available for the transport processes. Some of the functions may be performed in parallel, while others must be carried out in a precise sequence in time, with the user himself simply giving a trigger signal. Even in troublefree operation the entire control operation is complicated and also depends on external input quantities which must be monitored by means of sensors. These input quantities include the temperature, since if it falls below a value at which the flush water freezes, any use of the vacuum toilet must be prevented.
Hence it is customary in state-of-the-art control systems to use a control computer that operates in accordance with a certain program, specific base values being assigned to the program in advance.
In a state-of-the-art control system of this kind, operational reliability depends on preset values arrived at more or less empirically by long-term experience. While a control computer such as this may also be reprogrammed after the fact, such computers present the disadvantage that such reprogramming fails to allow for the conditions under which the toilet was used in the past. These conditions may be totally different if it is assumed that a toilet installed in a train may have been used at temperatures that may have been significantly below freezing or far above 30 degrees.
The aim of the invention is to create a device of the type described in the foregoing so that it may be modified quickly from the viewpoint of its control, and in particular so that it may be adapted to special circumstances that have arisen in the past. To be added is the fact that statistics may be compiled on errors that have occurred and on their particular features.
This is accomplished by means of the features claimed for the invention.
It is essential for this invention that the control computer be provided with means for storing values, such as an additional storage unit, that is capable of storing the characteristic values of all processes of operations carried out over a specific period of time. Such a period may extend, for example, over several weeks or even several months. On the basis of such storage values are available at any time that may be used again in order to adapt automatic control of the process as required for the future. The storage unit in the control computer also provides information on malfunctions and erroneous operation, so that feedback is possible in this respect as well.
The second essential feature of this invention is the provision of handheld means for controlling the operation processes, such as a handheld terminal, which is suitable both for input of data and output of data. Hence the terminal includes means for entering parameters of the operation processes into the computer by hand whereby new values may be registered, and printouts may also be obtained which reflect the processes with precision.
The invention is described by way of an exemplary embodiment with reference to the drawing.
The only FIGURE of the drawing shows a control device as claimed for the invention.
The invention relates to a device for controlling the processes that take place in the operation of a vacuum toilet, comprising a control computer installed below the seat of a toilet, time-controlled assemblies such as vacuum and compressed air generators with associated closing and opening va
REFERENCES:
patent: 4214324 (1980-07-01), Kemper et al.
patent: 4357719 (1982-11-01), Badger et al.
patent: 4592505 (1986-06-01), Bruninga et al.
patent: 4760547 (1988-07-01), Duxbury
patent: 4791688 (1988-12-01), Krishnakumar et al.
patent: 4937732 (1990-06-01), Brundisini
Fujita, English language abstract of JP 1-207,539, Aug. 21, 1989, 1 pg.
Fetsuga Robert M.
Sanivac Vakuumtechnik GmbH
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