EP2993271B1 - Control device and drinking water and/or domestic water system with such a control device - Google Patents

Description

The present invention relates to a control device which controls control valves in flushing sections of a drinking and / or process water system, so that a flushing of the drinking and / or service water system is performed. Furthermore, the invention relates to a drinking and / or service water system with such a control device.

Such control devices are known in the art.

The EP 2 466 019 A2 discloses a drinking water supply system with a control device and rinsing sections according to the preamble of claim 1. Volumetric flow sensors are provided for measuring the volume flows in the rinsing sections. About shut-off valves, which are located at the beginning of the diversion of the purge line from the main line, the purge lines are separable from the main supply line. Control valves are connected behind / to the consumers and can be opened via the control device if one of the volumetric flow measured values falls below a stored maximum value.

The EP 1 496 313 A1 relates to a transfer station for a supplied by district and local heating or boiler house connection station with a self-adjusting means for limiting the heat quantity to the actual needs and a method for demand-dependent determination of the amount of heat by means of a control valve, which is part of a transfer station.

The WO 2005/124494 A2 describes a system that automatically flushes stale water from drinking and / or service water systems to minimize the possibility of contaminated water reaching the consumer. The automatic flush can be time-based, but also temperature-dependent to avoid excessively hot or cold water to the user.

The US 2004/0206405 A1 describes an electronic controller for a water management system for saving water and monitoring all aspects of an installation system, such as water meter, flow control, leak detection, water heater on / off, hot water system and irrigation system.

The EP 2 096 214 A2 describes a drinking and / or service water supply system and a control device for this. Water sensors and pressure sensors are available to detect leaks, after which the controller can shut off the flushing via shut-off valves from the main line time.

The EP 1 887 150 A2 describes a central control device which performs a demand-oriented flushing of individual or all strands by targeted control of control valves.

When rinsing rinsing sections, however, it may happen that specifications for sound insulation can not be met. For drinking water and / or service water systems, it may be necessary for reasons of sound insulation, to limit the flow in the purge lines, whereby the process of rinsing is extended.

The present invention is therefore based on the problem, a control device for flushing a drinking or domestic water system, which allows an effective but quietest possible flushing of the system, and to provide a corresponding drinking or domestic water system.

According to its first aspect, the present invention proposes a control device with the features of claim 1.

The problem underlying the invention is solved by a control device according to claim 1. This control device is prepared in such a way that it determines a total volume flow of all flushing sections and compares it with a maximum flushing flow stored in the control device and controls the control valves when the stored maximum flow rate is exceeded in that the total volume flow is below the stored maximum volume flow. As a result, on the one hand, it can be ensured that the maximum volumetric flow to be maintained for reasons of soundproofing is not exceeded, but, on the other hand, the rinsing sections to be rinsed can be rinsed with the volumetric flow which is still tolerable to a maximum extent for reasons of soundproofing. It is therefore not necessary, the flow rate of all Spülstrecken statically by throttling or the like, ie rigidly set to a maximum value specified for reasons of soundproofing. On the contrary, the control device according to the invention makes it possible to adapt the volume flow acting in each case in the flushing zone (s) in such a way that sufficient satisfaction is achieved for the desired soundproofing without flushing with very low volume flows per flushing zone. Such low volume flows involve the risk of inadequate flushing. The higher the flow rate in a rinse line, the better the rinse result. Furthermore, a relatively low volume flow during flushing a relatively long flushing time with it, so that while the absolute sound level is kept low, but the sound exposure is extended in time. An optimization of the flushing volume by the control device according to the invention also provides a remedy and allows a rapid flushing of the individual or a plurality of flushing sections.

The control device controls control valves which are assigned to flushing lines of a drinking and / or service water system, so that a flushing is carried out. Such a drinking and / or service water system is for example from the DE 10 2006 017 807 B4 The disclosure content of which is likewise included in the present application, in particular insofar as it describes the drinking water or service water system as such. This utility model patent discloses different ways in which control valves can be arranged in such a system. The respective sections upstream of the respective valve sections of the pipeline system may be purge lines in the context of the present invention. In this case, the present invention, in particular, on such drinking or service water systems, which includes a plurality of rinse lines and a plurality of these downstream control valves that lead, for example, total in a sewer line on the sound protection may arrive and are accordingly flowed through only with a certain maximum volume should. The parallel purge lines can each be pipe sections of a cold or a hot water system. The control device according to the invention can also control the control valves, which are partially associated with the hot water and partly the cold water system. The said drinking and / or service water system preferably has floor and / or riser strands and at least one loop, which is connected to the floor and / or the riser pipe, so that a flushing of the strand, for example by water removal at a consumer or by to open the control valve at the end of the strand also leads to a flow in the loop.

The stored in the control device maximum flow is either factory preset or can be manually adjustable on the control device. The amount of the stored maximum volume flow is usually dependent on the volume flow permitted under soundproofing aspects. This can be the volume flow within a single purge section. Equally well, the totalized volumetric flow resulting from the combination of volumetric flows of different purge sections can be assumed as the target variable for the stored maximum volumetric flow. The control device determines the total volume flow, for example by processing measured values of the rinse lines or preset volume values for the rinse lines. By comparing the total volume flow of all rinse lines with the stored maximum volume flow, the control device decides whether control valves associated with the rinse lines must be closed to reduce the total volume flow.

Preferably, the control device comprises a timing mode, which controls the control valves time-dependent, in particular as a function of the time of day, so that rinsing is completely omitted, especially during the nocturnal rest periods.

According to a preferred embodiment of the present invention, the control device is designed such that the total volume flow can be determined on the basis of a measurement signal of a volume flow sensor. In this context, "volume flow sensor" is understood to mean any device known from the prior art which is suitable for measuring a volume flow and transmitting the measured value as a measurement signal to the control device. The measuring signals are preferably transmitted by means of electrical lines, but also a transmission by means of a radio link is conceivable. The number of volume flow sensors is not limited to a single volume flow sensor, so that several volume flow sensors can be used simultaneously. These multiple volume flow sensors are usually each assigned to a single flushing path. Sometimes a sensor is also associated with a flushing water outlet, which will be discussed below.

According to a further preferred embodiment of the present invention, the control device is designed such that the total volume flow can be determined by adding measured partial volume flow values of all volume flow sensors provided for the purge sections. In this preferred embodiment, the partial volumetric flow values of all the purge lines, attracted to the control device for evaluation, are usually determined by measuring, i. determined by the volumetric flow sensors.

According to a preferred embodiment of the present invention, the control device determines the total volume flow based on a measurement signal of a volume flow sensor, which is associated with a Spülwasserabgang. The flushing water outlet is arranged downstream of several flushing sections and connectable to these via the control valves. Preferably, the total volume flow can also be composed of volume flows of several flushing water outlets, which are determined by a plurality of volume flow sensors. In this case, the control device determines the total volume flow by addition of the measured partial volume flows of Spülwasserabgänge. The Spülwasserabgänge are preferably connected to the public sewage disposal network.

According to a preferred embodiment of the present invention, the rinsing sections comprise volume flow limiters, by means of which a partial volume flow in the respective rinsing section is predetermined. The partial volume flow values resulting from the volume flow limiters for each individual flushing section are stored in the control device, so that the total volume flow can be determined by adding the partial volume flow values of the flushing sections. "Volume flow limiters" are understood to be any devices with which the volume flow in the flushing path can be set to a maximum possible volume flow. This preferred development can also be combined with the development in which the total volume flow can be determined by adding measured partial volume flow values of all volume flow sensors provided for the purge sections. Thus, the total volume flow can be determined in part taking into account stored predetermined partial volume flow values and partly based on actually measured volume flow values.

In a preferred embodiment, the stored maximum volume flow is 15 l / min. The experiments have shown that sufficient account is taken of the desired sound insulation with such a volume flow. Thus, the control device preferably controls the control valves such that the maximum volume flow is not exceeded. However, as far as possible different rinsing distances are rinsed at the same time that the resulting total volume flow is 15 l / min or only 10 to 20% below this value.

The present invention also provides a drinking and / or service water system, which comprises the control device according to the invention.

With its secondary aspect, the present invention further provides a method for purging a drinking and / or process water system. According to the solution defined in claim 11, the water to be exchanged in the rinsing sections is diverted in a manner known per se during rinsing. As flushing is usually understood the upstream of a purge valve line. In this case, the invention - as with its device-related aspect - assumes that a plurality of such flushing sections, ie line sections with flushing valves, are provided. The dissipation of the water contained therein and to be exchanged by flushing takes place according to the method according to the invention such that the maximum volume flow of the discharged water of different flushing sections does not reach a stored maximum volume flow. This stored maximum volume flow is, for example, that volume flow value at which just no excessive noise development in the line for the discharge of the water to be exchanged arises. In the course of purging, the actual volume flow of the discharged water is preferably set close to the stored maximum volume flow, in order to effect the most rapid and effective purging. Thus, when carrying out the method according to the invention, at least two rinsing sections are regularly rinsed in parallel and the water of the two rinsing sections is removed in the single line for diverting the water to be exchanged. The water to be exchanged can be guided behind the purge valve initially in individual lines and only further downstream in a communal water pipe to divert the exchanged water to be merged. For this shared sewage pipe, the actual maximum volume flow to be determined with the stored maximum volume flow is relevant.

Fig. 1

eine schematische Ansicht eines ersten Ausführungsbeispiels;

Fig. 2

eine schematische Ansicht eines zweiten Ausführungsbeispiels und

Fig. 3

eine schematische Ansicht eines dritten Ausführungsbeispiels.

Further details and advantages of the present invention will become apparent from the following description of the embodiments in conjunction with the drawings. In this show:

Fig. 1

a schematic view of a first embodiment;

Fig. 2

a schematic view of a second embodiment and

Fig. 3

a schematic view of a third embodiment.

Fig. 1 shows an end portion of two flushing lines 2, at the respective ends of a control valve 4 is provided. Although the first embodiment only shows two flushing sections 2, the invention is not limited to two flushing sections 2, so that more than two flushing sections 2 can also be used. The ends of the flushing lines 2 are arranged such that they communicate with a flushing water outlet 6, which is connected to the public sewage disposal network. Water can thus be drained via the flushing water 6 from the flushing 2. Each purge section 2 is associated with a volume flow sensor 8, with which a volume flow within the respective purge section 2 can be measured. The thus measured volume flow of each rinse line 2 is transmitted as a measurement signal to a control device 10. From all transmitted volume flow values, the control device 10 determines by addition a total volume flow of all flushing sections 2. The total volume flow of all flushing sections 2 is then compared with a stored in the control device 10 maximum flow. The stored maximum volume flow can be deposited either manually or at the factory in the control device 10. In the event that the total volume flow of all rinse lines 2 exceeds the stored maximum volume flow, the control device 10 controls and closes certain control valves 4, so that the total volume flow just does not exceed the stored maximum volume flow. Otherwise, all rinse lines 2 are rinsed simultaneously. The non-flushed by closing the control valves 4 rinsing 2 are then rinsed. For this purpose, the control device 10 controls the control valves 4 in such a way that the control valves 4 of the flushed flushing lines 2 are closed and the control valves 4 of the not yet flushed flushing sections 2 are opened. Here too, the control device 10 checks whether the stored maximum volume flow is not exceeded by flushing the remaining flushing sections 2.

In Fig. 2 a second embodiment is shown, which essentially corresponds to the first embodiment, but in which the volume flow sensor 8 is not the rinsing 2, but the Spülwasserabgang 6 is assigned, whereby the investment cost for the production of this embodiment is reduced. There are less volumetric flow sensors, namely only a single for the in Fig. 2 shown embodiment required. Due to the measurement signal of the volume flow sensor 8 in the flushing water outlet 6, the control device 10 closes as many control valves 4, so that the total volume flow measured at the flushing water outlet 6 is below the stored maximum volume flow. As in the case of the first exemplary embodiment, the control device 10 subsequently closes the control valves 4 associated with the already flushed flushing sections 2 and opens the control valves 4 of the flushing sections 2, which may not yet have been flushed.

Fig. 3 shows a third embodiment, which substantially corresponds to the first embodiment, but does not require any flow sensor. Instead, the two individual purge sections 2 are associated with two volume flow limiters 12. Each of these volume flow limiters 12 limits the maximum possible volume flow in a rinse line 2, so that a fixed volume flow value is preset for each rinse line 2 and stored in the control device 10. On the basis of these input values, corresponding to the respective volume flows in the flushing sections 2, the control device 10 determines whether the resulting total volume flow exceeds the stored maximum volume flow. In this case, a flushing program is stored in the control device, which ensures that all flushing lines 2 are flushed. By comparing the individual volume flow values and adding selected volume flow values, the control device determines which control valves 4 can be opened at the same time for which rinse lines 2, without the stored maximum volume flow being exceeded. The thereby determined by the control device actuation of the individual control valves is carried out thereafter, preferably at the same time to rinse several rinsing lines 2 at the same time and then rinse another bundle of mutually associated rinsing 2.

The invention described above is not limited to the three embodiments. Thus, embodiments are also conceivable in which the flushing lines 2 combined with volume flow sensors 8 with flushing 2 with volume flow limiters 12 can be. In such an exemplary embodiment, the control device 10 determines the total volume flow on the basis of measured volumetric flow values and stored volumetric flow values of the volumetric flow limiter 12. On the basis of the total volumetric flow determined in this way, the control device 10 controls the control valves 4 in a manner as already described for the exemplary embodiments 1 and 2.

LIST OF REFERENCE NUMBERS

2

scavenging route

4

Control valve

6

Spülwasserabgang

8th

Flow Sensor

10

control device

12

flow regulator

Claims (11)

1. Control device (10) which is connected to regulating valves (4) for control thereof, which valves are associated with flushing segments (2) of a drinking and/or service water system, characterised in that the control device (10) is set up such that it determines a total volumetric flow rate of all the flushing segments (2) and compares said volumetric flow rate with a maximum volumetric flow rate stored in the control device (10) and, when the stored maximum volumetric flow rate is exceeded, actuates the regulating valves (4) such that the total volumetric flow rate is below the stored maximum volumetric flow rate.
2. Control device (10) according to claim 1, characterised in that the control device (10) is designed such that the total volumetric flow rate can be determined by said device on the basis of a measurement signal of a volumetric flow rate sensor (8).
3. Control device (10) according to claim 2, characterised in that the control device (10) is designed such that the total volumetric flow rate can be determined by addition of measured partial volumetric flow rate values from all the volumetric flow rate sensors (8) provided for the flushing segments (2).
4. Control device (10) according to either claim 2 or claim 3, characterised in that the control device (10) is designed such that the total volumetric flow rate can be determined on the basis of a measurement signal of a volumetric flow rate sensor (8) associated with a flushing water outlet (6) that is provided downstream of a plurality of flushing segments (2) and can be connected to said segments via the regulating valves (4).
5. Control device (10) according to any of the preceding claims, characterised in that the flushing segments (2) each have volumetric flow rate limiters (12) by means of which a partial volumetric flow rate in the relevant flushing segment (2) is predetermined, in that predetermined partial volumetric flow rate values for individual flushing segments (2) are stored in the control device (10), and in that the total volumetric flow rate can be determined by addition of the partial volumetric flow rate values of the flushing segments (2).
6. Control device (10) according to any of the preceding claims, characterised in that the stored maximum volumetric flow rate is 15 l/min.
7. Drinking and/or service water system having flushing segments (2), at the end of each of which a regulating valve (4) is provided such that the flushing segments (2) can be connected to a flushing water outlet (6), and having a control device (10) according to claims 1 to 6, which is connected to the regulating valves (4) for control thereof.
8. Drinking and/or service water system according to claim 7, characterised by a volumetric flow rate sensor (8) which is associated with the flushing water outlet (6).
9. Drinking and/or service water system according to either claim 7 or claim 8, characterised by volumetric flow rate sensors (8) which are associated with the flushing segments (2).
10. Drinking and/or service water system according to any of claims 7 to 9, characterised by volumetric flow rate limiters (12) which are associated with the flushing segments (2).
11. Method for flushing a drinking and/or service water system having a plurality of flushing segments (2) containing water to be exchanged, wherein the discharge of the water to be exchanged in flushing segments (2) is controlled such that the maximum total volumetric flow rate of the discharged water of different flushing segments (2) does not reach a stored maximum volumetric flow rate.

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