WO2016120117A1 - Measurement device for measuring a volume flow of a liquid - Google Patents

Abstract

The invention relates to a measurement device (101) for measuring a volume flow of a liquid which emerges at an extraction point, wherein the measurement device (101) comprises an inlet (102), an outlet (103), a backing-up chamber, an outflow chamber, a measurement chamber with a fill level measurement means, and an orifice, wherein the inlet (102) leads into the backing-up chamber, wherein the outlet (103) leads out of the outflow chamber, and wherein the orifice connects the backing-up chamber to the outflow chamber. Here, the measurement device (101) comprises a calming chamber, wherein the calming chamber is arranged between the backing-up chamber and the measurement chamber.

Description

Measuring device for measuring a volume flow of a

Liquid"

The invention relates to a measuring device for measuring a volume flow of an emerging at a sampling point

Liquid according to the preamble of claim 1.

From DE 10 2009 027 793 AI a measuring device for measuring the volume flow is known, which has an inlet, a

Outlet, a backwater chamber, a drain chamber, a

Measuring chamber comprising a level gauge and a diaphragm, wherein the inlet leads into the back pressure chamber, wherein the outlet leads from the drain chamber and wherein the diaphragm connects the back pressure chamber with the drain chamber.

It is an object of the invention to provide a measuring device for measuring a volume flow of a liquid emerging at a sampling point, which has a high accuracy of measurement and in particular also has compact dimensions.

This task is based on the characteristics of the

The preamble of claim 1 by the characterizing

Characteristics of claim 1 solved. In the dependent claims advantageous and expedient developments are given.

The measuring device according to the invention for measuring a

Volume flow of a liquid emerging at a sampling point, comprises a calming chamber, wherein the

Calming chamber between the backflow chamber and the Measuring chamber is arranged. By arranging a calming chamber between the backflow chamber, in which inflowing liquid collects, and the measuring chamber, in which a level is established, which is a measure of an instantaneous volume flow, it is possible to

Level fluctuations in the measuring chamber opposite

Level fluctuations in the backpressure chamber, which are caused by the flowing liquid and / or by a changing volume flow to reduce and dampen such that over time a more accurate detection of the

Fill levels is possible.

It is further provided, the back pressure chamber, the

Calming chamber and the measuring chamber to be connected to each other such that during operation of the measuring device in each lying in a measuring range of the measuring device constant volume flow, the back pressure chamber, the settling chamber and the measuring chamber has approximately the same level. By created in this way for the liquid possibility to fill with an approximately equal level or about the same level, the three adjacent chambers without their

Surface is interrupted, finds an automatic

Calming of the surface analogous to a leakage of waves instead. The calming chamber is considered one in admissible

Measuring range always imperfectly filled, limited by sidewalls and extending between the back pressure chamber and the measuring chamber running channel.

Here, the measuring device is designed so that the

Level measuring device repeatedly detects the level in the measuring chamber and stores level readings and / or outputs at an interface, the

Level measuring device comprises in particular capacitive measuring level sensors. Alternatively or cumulatively thereto, the measuring device comprises a temperature measuring device, wherein the temperature measuring device has an electronic

Temperature sensor comprises, wherein the temperature measuring device with its temperature sensor, a temperature of the Measuring device continuously traversing fluid detected in particular in the region of the outlet of the measuring device and stores temperature readings and / or at a

Output interface. By the optional or cumulative equipment of the measuring device with such

Level measuring device and / or such

Temperature measuring device, it is possible to

Volume flow profile and / or to record the temperature profile over time and evaluate. If both the

Flow rate as well as the temperature profile

be recorded, it is possible on the basis of

detected values e.g. also to calculate the amount of heat taken from a sampling point in a certain period of time. Furthermore, it is possible to use e.g. also the efficiency of domestic water heaters

Water tapping points, such as Monitor sinks or bathtubs or showers.

Furthermore, it is provided to provide the inlet of the measuring device with an inlet opening and a pipe, wherein the tube adjoins the inlet opening, wherein the tube over at least 75% and in particular at least 90% of a height of the back pressure chamber into the back pressure chamber

extends, so that between a circumferential lower edge of the tube and a bottom of the back pressure chamber, a circumferential gap is formed, through which inflowing liquid flows into a formed between an outer wall of the tube and a wall of the back pressure chamber. Such a design ensures that the

Backflow chamber always filled by inflowing liquid from below, so that no disturbing a surface of the accumulating in the measuring device through the liquid

inflowing liquid is generated. Furthermore, it has also been observed that such introduction of the liquid into the backflow chamber also causes air entrained by the liquid to escape more strongly from the liquid. This then again allows level measurements, which

are largely independent of whether the liquid at Outlet from the sampling point has a high or low air content. This is particularly advantageous when measurements are made in the home, since here at the sampling points usually different

Jet regulators, which are also referred to as aerators are installed, and can be measured without

Aerator must be removed for measurement.

It is also provided to provide the inlet of the measuring device with an inlet opening and a pipe, wherein the tube adjoins the inlet opening, wherein a perpendicular to a central longitudinal axis of the tube extending cross-section of the tube from the inlet opening to a

the lower edge and an inner space of the tube, in particular, a down to a bottom of

Back pressure chamber in particular conically tapered course has. By such, in cross section in

Flow direction narrowing design of the interior of the tube is also shown that entrained by the liquid air when flowing out of the tube reinforced from the

Liquid escapes. The cross section of the tube can be chosen freely and in particular circular, elliptical or polygonal executed.

Furthermore, it is provided, a bottom of the back pressure chamber in particular. below a circumferential ünterkante of the tube as a baffle with at least one survey and / or

form at least one depression. It has been shown that by such a deviating from a flat shape of the soil depending on the specific design of the soil increased sedation of the liquid and / or increased escape of the liquid

entrained air is reached. Particularly good results can be achieved here, if the baffle

is designed opposite to the lower edge of the tube, so that the inflowing liquid directly against the

Baffle is guided. It is also provided to equip the measuring device with a sieve, wherein the sieve, in particular in the form of a pipe section, starting from a bottom of the

Backflow chamber around a pipe, through which liquid

flows in the direction of the inlet over at least 50% of the height of the back pressure chamber and in particular at least 80% of the height of the back pressure chamber and preferably extends over the entire height of the back pressure chamber. In the arrangement of such a sieve can be a reassurance of

Fluid and an escaped escape from the

Observe the liquid of entrained air.

Furthermore, it is provided, the back pressure chamber and the

Compressing chamber to connect through a first communication port and to connect the settling chamber and the measuring chamber through a second communication port, wherein the settling chamber is formed as a channel which extends from the first communication port to the second

Communication opening extends, the measuring chamber

in particular comprises an opening lying above a maximum level of the measuring chamber. Such a connection of the chambers, in which the communication openings extend in particular both over an entire height of the back pressure chamber and over an entire height of the measuring chamber, enables a fluid communication between the

Backflow chamber and the measuring chamber, which over large

Cross sections and so a rapid adaptation of the

Filling level of the measuring chamber to the level of the back pressure chamber allows without the back pressure chamber and the measuring chamber are directly or directly connected to each other and without any existing in the back pressure chamber agitation of the liquid directly or directly into the measuring chamber

can continue.

It is also provided to align a bottom of the settling chamber approximately at a level of a bottom of the back pressure chamber and that transversely to an extension direction of the

Settling chamber extending cross sections through the Particular calming chamber in each case about one

Have cross-sectional area and cross-sectional shape corresponding to a cross-sectional area and cross-sectional shape of the first and second communication opening. By a

Orientation of the bottom of the calming chamber at a bottom of the backflow chamber, it is possible even low levels of the back pressure chamber, which is small, in the lower

Set the measuring range of the lying volume flows to the

Continue to conduct the measuring chamber. Through the education of

Settling chamber with in the extension direction of

Settling chamber approximately constant cross-sections will allow unimpeded fluid communication between the

Backflow chamber and the measuring chamber ensured.

With regard to the settling chamber, it is also provided to arrange the settling chamber along a wall of the backflow chamber and in particular along a wall of the drain chamber. Such a structure allows a compact and in particular the shape of a cylinder approximate design of the measuring device. Such a quasi-cup-shaped design of the measuring device enables optimal handling by a person performing measurements and in removal points situated in a limited environment, such as e.g. a faucet on a small hand basin, also a simple swinging the measuring device under the jet regulator. Depending on a length, which the calming chamber in her

Extending direction, and depending on a

Alignment of the settling chamber to the back pressure chamber, it is also advantageous to guide the settling chamber along a wall of the drain chamber to the compact structure of the

Secure measuring device. It is also envisaged that the wall of the backflow chamber and in particular also the wall of the discharge chamber form a wall section of the settling chamber. This double use of walls further favors a compact construction. It is also envisaged that the calming chamber has an arcuate course in plan view and thus in its extension direction. By such a shape is a compact to a Cylinder approximate shape of the measuring device also favors.

Furthermore, it is also provided, at least one

Wall section of the calming chamber to provide such elevations and / or depressions that a propagation and / or formation of waves is hindered in the liquid located in the calming chamber. In particular, it is provided on both wall sections of the

Reassessment chamber offset from one another to arrange a plurality of mutually parallel and perpendicular projections, which extend over at least 80% of a height of the settling chamber and are formed in cross section and in plan view in particular as a half cylinder. The observation shows that this results in a calming of the liquid towards the measuring chamber with simple means.

It is intended, a volume of a backwater of the

Backflow chamber about 5 times to 15 times and in particular about 9 times as large as a volume of the settling chamber

form and the volume of the backwater of the

Backwash chamber about 3 times to 9 times and in particular about 6 times as large as a volume of the measuring chamber form. Such a dimensioning of the volume makes it possible to achieve reliable and good measurement results for a measuring range of about 1.5 1 / min to 18 1 / min after tests. Here, the volume of the back pressure chamber of the back pressure chamber is in a range of 0.1 1 to 0.2 1 and in particular about 0.15 1. Together with a limited volume through the sieve, the back pressure chamber has a total volume of about 0.25 1 ,

It is also intended, the measuring device with a

Equip evaluation, wherein the evaluation is designed in particular as a physically independent evaluation and wired and / or wirelessly with the level measuring device and / or the

Temperature measuring device is connected, wherein the

Evaluation device, in particular a display for display the measurement results, wherein the evaluation device in particular a processor for processing the

Measuring results and wherein the evaluation device comprises in particular a memory for storing the measured values. This ^makes' it possible for the user to perform the measurement, and in particular a correct alignment of the inlet of the measuring device to the

Focus on sampling point. This favors the quality of the measurements, as erroneous measurements by flowing next to it

Due to the fact that the user only has to concentrate on the orientation of the inlet, it hardly ever needs to be liquid.

Furthermore, it is provided by means of the diaphragm

To conduct liquid into the drainage chamber such that

at least a portion of the outflowing liquid flows against a temperature sensor of a temperature measuring device, the measuring device for this purpose in particular comprises a guide device, wherein the guide device is in particular formed as a groove, which is arranged below the diaphragm and aligned with the temperature sensor, so that they

Liquid collects and this liquid on the

Temperature sensor conducts, with the temperature sensor

especially . is arranged below and opposite the diaphragm and is positioned in particular below the measuring chamber. Such a design ensures that even at low flow rates of the temperature sensor reliably

Liquid is flowing. Furthermore, this is

ensures that the temperature sensor also quickly detects changes in the temperature of the liquid, since this is constantly flowing from the newly described by the type described

Liquid is washed around.

Finally, it is provided to form a peripheral wall of the measuring chamber with a breakthrough extending over a height of the measuring chamber, wherein the

Level measuring device comprises a board through which the opening is sealed so that on one of Measuring chamber facing the underside of the board arranged level sensors, which are in particular designed as capacitive sensors, have in an interior of the measuring chamber, wherein on the board in particular also a

Temperature measuring device with its temperature sensor

is arranged and wherein the board extends in particular to below a bottom of the measuring chamber and wherein the

Temperature sensor, in particular below the bottom of the

Measuring chamber is arranged on the board such that it protrudes into the outlet of the measuring device. The use of the board as part of the wall of the measuring chamber leads to a particularly compact construction of the measuring device. Furthermore, by such a double or

 Triple use of the board keep the number of items small and thus reduce the production costs. A

Dual use occurs when the board is used both as a carrier for electronics and as a carrier for sensors

Determining the level of the measuring chamber is used. A triple use is when the board is also used as a support for the temperature sensor.

Further details of the invention are described in the drawing with reference to schematically illustrated embodiments.

Hereby shows:

Figure 1: a schematic representation of a first

 measuring device according to the invention in a sectional side view;

FIG. 2 shows a section through the representation of FIG. 1

 corresponding to the section line II-II shown in Figure 1;

Figure 3: a perspective view of a second

measuring device according to the invention; Figure 4: a perspective view of the second

 Measuring device with the lid removed;

Figure 5: a perspective view of the second

 Measuring device with the cover removed and removed intermediate wall;

Figure 6: a perspective view of the lid and the

 Inlet of the second measuring device;

FIG. 7 shows a further perspective illustration of the second measuring device according to the invention;

FIG. 8: another perspective view of the second one

 Measuring device with the cover removed and removed intermediate wall;

FIG. 9 shows a longitudinal section through the second measuring device in a perspective view;

Figure 10: a perspective view of the lid, the

 Intake and the sieve and

Figure 11: a bottom view of the second measuring device.

FIG. 1 is a schematic illustration of a first measuring device 101 according to the invention in a sectional side view. In FIG. 2, this is

Measuring device 101 shown in a section through the illustration of Figure 1 according to the section line II-II shown in Figure 1. The measuring device 101 is used to measure a volumetric flow V2 of a liquid 2 emerging at a removal point 1. The removal point 1 is in this case formed by a water tap 3, of which only one jet regulator 4 is shown. The measuring device 101 comprises an inlet 102, an outlet 103, a backpressure chamber 104, a

Drain chamber 105, a measuring chamber 106 with a Level gauge 107 and an aperture 108 through which the back pressure chamber 104 is connected to the drain chamber 105. In this case, the liquid 2 is introduced through the inlet 102 into the backflow chamber 104 and discharged through the outlet 103 from the discharge chamber 105. The measuring device 101 also includes a calming chamber 109, wherein the

Settling chamber 109 is positioned between the back pressure chamber 104 and the measuring chamber 106. The back pressure chamber 104, the calming chamber 109 and the measuring chamber 106 are connected to one another such that during operation of the measuring device 101 - if the volume flow supplied from the sampling point is constant and is within a measuring range of the measuring device 101 - the back pressure chamber 104, the settling chamber 109 and the measuring chamber 106 have approximately equal fill levels F104, F109 and F106. Such a situation is in FIG. 1

shown, wherein a surface 2a located in the

Measuring device 101 accumulating liquid 2 is schematically indicated by a wave-shaped line, which extends from the backflow chamber 104 via the settling chamber 109 into the measuring chamber 106 and from the back pressure chamber 104 in the

Drain chamber 105 extends.

The inlet 102 includes one in a housing 110 of the

Measuring device 101 formed inlet opening 111 and a subsequent to the inlet opening 111 tube 112, which extends into the back pressure chamber 104 inside. The tube 112 extends over a length L112 over 83% of a height H104 of the back pressure chamber 104. Accordingly, between a circumferential lower edge 113 of the tube 112 and a bottom 114 of the back pressure chamber 104, a circumferential gap 115 is formed, through which the liquid 2 flows. The liquid 2 flowing in through the pipe 112 is symbolized in FIG. 1 by two arrows P50 and P51.

The measuring device 101 also includes a sieve 119, which is installed in the back pressure chamber 104. The sieve 119 is formed as a tubular hollow cylinder and has a

Center longitudinal axis ML119 on, which parallel to and on one Center longitudinal axis ML112 of the tube 112 extends. The strainer 119 extends with a height H119 from the bottom 114 of the back pressure chamber 104 almost over the entire height H104 of the back pressure chamber 104 in the direction of the inlet 102 and the inlet opening 111, respectively

Center longitudinal axis ML112 of the tube 112 views to the tube 112 a distance a and to a wall 120 of the

Backflow chamber 104 a distance b. Here is the

Distance b about as large as the distance a. The symbolized by the arrows P50 and P51 liquid 2 flows through the tube 112 against the bottom 114 of the back pressure chamber 104 and then flows through the gap 115 in the direction of the strainer 119, and then through its openings in a between the sieve 119 and a wall 117 formed the backflow chamber 104

Redistribution space 118 to distribute. The bottom 114 forms a

Baffle P114 for the inflowing liquid 2 through which the liquid 2 is deflected in its flow direction.

The backflow chamber 104 and the settling chamber 109 are connected by a first communication port 121.

Furthermore, the settling chamber 109 and the measuring chamber 106 are connected by a second communication port 122. The settling chamber 109 is formed as a passage 123 that extends from the first communication port 121 to the second communication port 122 in an extension direction R109 from a bottom 167 having a height H109 that corresponds to the heights H104 and H106 of the backpressure chamber 104 and the metering chamber 106. Furthermore, the measuring chamber 106 comprises an opening 124 located above a maximum filling level FMA106 of the measuring chamber 106, which is formed in the housing 110. In the measurement of steaming liquids, the vapor can be withdrawn through the opening 124 upward in the direction of arrow y, so that measurement errors, which can occur in particular at low levels due to precipitation, is prevented.

The measuring device 101 includes in addition to the Level measuring device 107 also a

 Temperature measuring device 125. The fill level measuring device 107 repeatedly detects the fill level F106 in the measuring chamber 106 over a period of time and outputs the fill level measured values at an interface 126. In this case, the interface 126 is formed by a radio module 127, which transmits the fill level measured values to a receiver, not shown. Instead of one

Radio transmission is according to a not shown

Embodiment also provided a wired data transmission. Another not shown

Embodiment variant provides that the level measurement values or measurement data are first stored in a memory and then output at a later time. The

Level measuring device 107 is arranged on a circuit board 128 and comprises a multiplicity of capacitively operating fill level sensors 129. For reasons of clarity, only two of the fourteen shown are exemplary

Level sensors referred to. Through the board 128 of the

Level measuring device 107 is formed in a wall 130 of the measuring chamber 106 opening 130a, which extends from a bottom 132 over the entire height H106 of the measuring chamber 106, sealed so that the on a

Bottom 128b of the board 128 arranged capacitive

Fill level sensors 129 point into the measuring chamber 106 and

thereby come into contact with the liquid 2 located in the measuring chamber.

According to an embodiment variant which is not illustrated, the printed circuit board is coated with a protective film toward the measuring chamber and adhesively bonded to the housing of the measuring device in a watertight manner.

The temperature measuring device 125 includes a

Temperature sensor 131 and is also disposed on the board 128. Here, the temperature sensor 131 is disposed on the lower side 128b so as to be positioned outside the measuring chamber 106. The board 128 extends below the bottom 132 of the measuring chamber 106, so that the temperature sensor 131 below the bottom 132 of the measuring chamber is arranged in the region of the outlet 103. The

Temperature measuring device 125 recorded with her

Temperature sensor 131 a temperature T2 of the

Measuring device 101 flowing through liquid 2 repeatedly in a time interval. Corresponding temperature measured values, as well as the fill level measured values, are forwarded via the radio module 127.

On an upper side 128a of the board 128, in addition to the mentioned radio module 127, a computer unit 133 with memory 134 and a processor 135 as well as a power source 136 are provided

arranged.

With more. Arrows P52 to P55 are indicated as the

Liquid 2 flows through the discharge chamber 105 through an outlet opening 137 of the outlet 103 formed in the housing 110. To the temperature sensor 131 even at low

Volume flows constantly to flow around with fresh liquid 2, the measuring device 101 comprises a groove 138, which in the region of the outlet 103 below the outlet opening 137th

is arranged and outflowing liquid 2, as indicated by the arrow P55, passes to the temperature sensor 131. The channel 138 forms a guide device 139. Through the

Surface 2a, which forms the liquid 2 in the discharge chamber 105, is against a wall 140 of the discharge chamber 105, the outflowing behavior of the liquid 2 in the

Drainage chamber symbolizes. On a wall 141 of the

Calming chamber 109, which is formed by two opposite wall portions 141a and 141b are through

Projections 142 mutually opposite elevations 143 and depressions 144 formed, which favor a calming of the surface 2a, which forms the liquid 2 in the measuring device 101.

In principle, three states must be distinguished during operation of the measuring device 101. The first state is when the liquid flows in with increasing volume flow. The second condition is when the liquid is equal to flowing volume flows. The third condition is when the liquid decreases with decreasing flow

flows.

In the figures 3 to 11 is a second invention

Measuring device 201 in predominantly perspective

Representations shown in full and in parts.

FIG. 3 shows a perspective view of the second measuring device 201 in a completely assembled form. On an upper side 210a of the housing 210 is an inlet opening

211 of an inlet 202 recognizable, which is with a pipe

212 in a back pressure chamber 204 (see Figure 4) continues.

Furthermore, an opening 224 can be seen with which a measuring chamber 206 (see FIG. 4) opens upwards. The housing 210 has a height H210 of about 16 cm, a width B210 of about 10 cm and a depth T210 of about 7.5 cm. Basically, the housing 210 is sized to be

below its top 210a can be comfortably held with one hand. The housing 210 comprises a main body 260, which is closed to the top 210a by a removable cover 261, wherein in the lid 261 a the

Inlet opening 211 forming inlet funnel 211 a and the tube 212 are held. Furthermore, the opening 224 for the measuring chamber 206 is formed in the lid 261. The housing 210 further comprises a side cover 262, through which a water-protected receiving space 263 (see Figure 7) for a level measuring device 207 (see Figure 7) and a

Temperature measuring device 225 (see Figure 7) is closed.

The already mentioned Figure 4 shows a perspective

Representation of the main body 260 of the measuring device 201 with the cover removed 261 (see Figure 3), taken out inlet 202 (see Figure 3) and removed sieve 219 (see Figure 9). From the backflow chamber 204, a bottom 214 and a laterally delimiting wall 217 are visible. From the ground 214 rises an associated with this open ring 264, which is intended for attachment of the already mentioned sieve 219. Within the ring 264, the bottom 214 forms a baffle P214 for incoming liquid. The

Baffle P214 includes a bump 265 which is centrally disposed in the ring 264. The wall 217 is pierced by a shutter 208, which is designed as an elongated slot and which opens the back pressure chamber 204 to a drain chamber 205. Furthermore, the wall 217 is opened by a first communication opening 221 to a settling chamber 209. The drainage chamber 217 is bounded laterally by a wall 240 and downwardly by a bottom 266 only near the wall 240 (see FIG. 5). In this case, an outlet 203 in the form of an outlet opening 237 is designed in the bottom 266 so that liquid can flow out of the outlet chamber 217 downwards (see also FIG. 5). From its first communication opening 221, the settling chamber 209 leads bounded by a wall 241, which comprises two opposite wall sections 241a and 241b, via a second

Communication opening 222 in the above-mentioned measuring chamber 206. Here, the settling chamber 209 is initially guided along the wall 217 surrounding the backflow chamber 204 and then along the wall 240 surrounding the discharge chamber 205. The calming chamber 209 has an arcuate extension direction R209 in plan view and circulates the back pressure chamber 204 and the drain chamber 205 on an arc.

According to unillustrated embodiments, it is also contemplated that the calming chamber exclusively along the back pressure chamber or exclusively along the

Drain chamber runs. In order to ensure a compact cross-section of the basic body of the measuring device which approximates the circular shape, the settling chamber has in the

Top view of a curved course around at least one other chamber.

If liquid with a in the measuring range of

Measuring device 201 lying volume flow of about 1.5 to 18 1 / min flows through the inlet 202 (see FIG. 3), the backflow chamber 204 (see FIG. 4) fills up to a fill level F204 corresponding to the current volume flow, depending on the currently flowing volume flow, the flow of liquid flowing in and the volume flow remaining constant the over the aperture 208, the drain chamber 205 and the outlet 203 effluent correspond. The bottom 214 of the back pressure chamber 204, a bottom 267 (see Figure 5) of the calming chamber 209 and a bottom 232 (see Figure 5) of the measuring chamber 206 are at a level N214. Thus, from the beginning, as the backflow chamber 204 fills, the liquid from the backflow chamber 204 flows via the settling chamber 209 into the metering chamber 206, so that the metering chamber 206 to each

Time has a level F206, which corresponds approximately to a level F204 of the back pressure chamber 204 and a level F209 of the calming chamber 209. By means of the

Calming channel 209, via which the backflow chamber 204 is communicatively connected to the measuring chamber 206, in particular, a calming of a surface of the accumulated liquid, so that the liquid in the measuring chamber 206 forms a calmer surface compared to the liquid in the back pressure chamber 204. When changing volume flow is carried out by the settling chamber 209 an influx or

Downstream of liquid, so that the level in the measuring chamber 206 changes according to the current flow and increases or decreases.

The chambers of the measuring device 201 are dimensioned so that the back pressure chamber 204 between the screen 219 and its circumferential wall 217 has a volume V204 of about 0.15, the calming chamber 209 has a volume V209 of about 0.017 1 and the measuring chamber 206 a Volume V206 of about 0.022 1 has.

In FIG. 5, the wall parts separating the individual chambers are taken out, so that the view of the floor 267 of the backflow chamber 209 and the bottom 232 of the measuring chamber 206 is released. Furthermore, the outlet 203 the discharge chamber 205 better visible. Under the

Outlet opening 237 is formed as a groove 238

Guide device 239 recognizable, on which runs out of the outlet 203 liquid. Since in the figure 5, the level measuring device 207 (see Figure 7) and the

Temperature measuring device 225 (see Figure 7) not

are shown, the view into the water-protected receiving space 263 is released from the measuring chamber 206 out.

In FIG. 6, the cover 261 is shown with the inlet 202 inserted into the cover 261. The tube 212 has from the inlet opening 211 to its circumferential lower edge 213 toward a conically tapered course, so that the

Cross sections of the tube 212 to the lower edge 213 are increasingly smaller. The tube is thus designed so that it forms a nozzle.

FIG. 7 shows the measuring device 201 with the side cover 262 removed (see FIG. 3), so that the view into the water-protected receiving space 263 is released. Of the

Receiving space 263 is opened to the measuring chamber 206 through an opening 230a, which is formed in a circumferential wall 230 of the measuring chamber 206 (see FIG. 5). This breakthrough is through a board 228 (see Figure 9) on which the level gauge 207 and the

Temperature measuring device 225 are constructed,

sealed liquid-tight. In FIG. 7, only the printed conductors, which are formed on an underside 228b of the printed circuit board 228, are superimposed, thus the zigzag-shaped one

Tracks are recognizable, which are the individual

Level sensors 229 (only two sensors are exemplified) form. By means of a further opening 268 located below the opening 230a in the receiving space 263, the mentioned gutter 238 can again be seen which lies below the discharge chamber 205 (see FIG. 5) and arranges liquid on the underside 228b of the board 228

Temperature sensor 231 supplies (see Figure 9). It can be seen in FIG. 9 how the tube 212 and the strainer 219 are arranged in the backflow chamber 204, and that between the lower edge 213 of the tube 212 and the bottom 214

Back pressure chamber 204 and the ring 264, a gap 215 is opened, through which the flowing through the pipe 212

Liquid continues to flow. In the figure 9 was on a

Hatching of cut surfaces is dispensed with.

FIG. 10 additionally shows, in addition to FIG. 6, the previously mentioned sieve 219, which is fixed not only by the ring 264 (see FIG. 4) but also by the tube 212.

Finally, FIG. 11 shows a bottom view of the

Measuring device 201. In this view, it can be seen again how the channel 238 is positioned below the outlet 203 arranged out of the discharge chamber 205. Furthermore, it can be seen that the main body 260 is designed with its hollow surface M260 double-walled with hollow chambers 269. Thus, the measuring device 201 can also be held by hand and without additional protection, even if the measuring device 201, e.g. flows through 60 ° C hot water.

With reference to FIG. 4, it should be noted that the orifice 208 and the first communication opening 221 are located diagonally opposite each other with respect to the back pressure chamber 204.

The measuring device shown in FIGS. 3 to 11 makes it possible to measure volume flows with a resolution of 0.1 liter per minute. It is a measurement accuracy of +/- 5% v. M. +/- 0.1 1 / m achieved. The temperature profile is with a

Measuring accuracy of +/- 3% vm +/- 0.1 ° C are measured. Reference sign list:

1 sampling point

2 liquid

 2a surface of 2

 3 faucet

 4 aerator a Distance

b distance

 F104 level of 104

 F106 level of 106

 F109 level of 109

 H104 height of the backflow chamber 104

H106 Height of the measuring chamber 106

 H109 height of the settling chamber 109

H119 height of the sieve 119

 L112 length of the pipe 112

 ML119 Center longitudinal axis of the sieve 119

ML112 central longitudinal axis of the tube 112

FMA106 maximum level of 106

P50, P51 arrow

 P52 - P55 arrow

 P114 baffle

 R109 extension direction

 T2 temperature of 2

 V2 Volume flow of the liquid 2

101 measuring device

102 inlet of 101

103 outlet of 101

104 backflow chamber

105 drainage chamber

106 measuring chamber

107 Level measuring device

108 Aperture between 104 and 105 109 Calming chamber

110 housing of 101 inlet port

pipe

circumferential lower edge of 112 bottom of the back pressure chamber 104 gap

 Outer wall of the tube 112

Wall of the back pressure chamber 104 Rückstauraum

scree

 Wall of 104

first communication opening second communication opening

channel

 opening

 Temperature measuring device

 interface

 radio module

 circuit board

 Top of the board 128

 Bottom of the board 128

 level sensor

 Wall of the measuring chamber 106

 Breakthrough in the wall 130

temperature sensor

 Bottom of the measuring chamber 106

 computer unit

 Storage

 processor

 energy

 Outlet opening of the outlet 103 gutter

 Guiding device

 Wall of the drain chamber 105th

Wall of the settling chamber 109 opposite wall sections

Ahead of 141

 Charge to 141

Deepening at 141 167 Soil of the settling chamber 109

B210 width B210

 F204 level of 204

 F206 level of 206

 F209 level of 209

 H210 altitude of 210

 M260 lateral surface of 260

 N214 level of 214

 P214 baffle at 214

 R209 arcuate extension direction of 209

T210 depth of 210

 V106 volume of the measuring chamber 106

 V109 volume of the settling chamber 109

 V118 volume of the backwater of 104

201 measuring device

 202 inlet

 203 outlet

 204 backflow chamber

 205 drain chamber

 206 measuring chamber

 207 level measuring device

 208 aperture

 209 calming chamber

 210 housing

 210a top of the housing 210th

 211 inlet opening

211a inlet funnel

 212 pipe

 213 circumferential lower edge of 212

 214 bottom of the back pressure chamber 204

 215 gap between 212 and 214

217 Wall of the backflow chamber 204

219 sieve

 221 first communication opening

 222 second communication opening

224 opening over 206 225 temperature measuring device

 228 board

 228b bottom of 228

 229 level sensor

 230 Wall of the measuring chamber 206

 230a breakthrough in the wall 206

231 temperature sensor

 232 bottom of the measuring chamber 206

 237 outlet opening

 238 gutter

 239 guide device

 240 wall of the drain chamber 205

241 Wall of the settling chamber 209

241a, 241b opposite wall sections

260 basic body of 201

 261 removable lid

 262 side covers

 263 water-protected recording room

264 open ring

 265 survey on P214

 266 bottom of the drainage chamber 205

 267 Soil of the settling chamber 209

268 opening

 269 hollow chamber

Claims

Claims : 1. Measuring device (101, 201) for measuring a volume flow (V2) of a discharge point (1) emerging Liquid (2),  - wherein the measuring device (101, 201) has an inlet (102;  202), an outlet (103; 203), a back pressure chamber (104; 204), a drain chamber (105; 205), a metering chamber (106; 206) with a level gauge (107; 207), and an orifice (108; 208) includes,  - wherein the inlet (102, 202) into the back pressure chamber (104;  204),  - wherein the outlet (103, 203) from the discharge chamber (105;  205) leads and  the diaphragm (108; 208) connecting the back pressure chamber (104; 204) to the drain chamber (105; 205),  - characterized,  - that the measuring device (101, 201) comprises a calming chamber (109, 209),  - wherein the calming chamber (109; 209) between the  Backflow chamber (104, 204) and the measuring chamber (106, 206) is arranged. 2. Measuring device according to claim 1, characterized in that the backflow chamber (104, 204), the settling chamber  (109; 209) and the measuring chamber (106; 206) are connected to one another in such a way that during the operation of the measuring device (101; 201) the backflow chamber at each constant volume flow (V2) lying in a measuring range of the measuring device (101; 201) (104; 204), the settling chamber (109; 209) and the Measuring chamber (104, 204) have approximately the same level (F104, F109, F106, F204, F209, F206). 3. Measuring device according to claim 1, characterized in that  - The level measuring device (107, 207) the level (F106; F206) in the measuring chamber (106; 206) repeatedly records and stores level readings and / or on a Output interface (126), wherein the  Level measuring device (107, 207) comprises in particular capacitively measuring fill level sensors (129, 229) and / or - that the measuring device (101, 201) has a  Temperature measuring device (125; 225), wherein the temperature measuring device (125; 225) comprises an electronic temperature sensor (131; 231), wherein the  Temperature measuring device (125; 225) with their  Temperature sensor (131, 231) a temperature (T2) of the liquid flowing through the measuring device (101, 201) liquid (2), in particular in the region of the outlet (103, 203)  Measuring device (101, 201) repeatedly detected and  Temperature readings stores and / or on a  Output interface (126). 4. Measuring device according to at least one of the preceding claims, characterized in that the inlet (102; 202) has an inlet opening (111; 211) and a tube (112; 212) wherein the tube (112; 212) adjoins the inlet port (111; 211), the tube (112; 212) extending over at least 75% and in particular at least 90% of a height  (H104) of the back pressure chamber (104; 204), so that between a peripheral lower edge (113; 213) of the tube (112; 212) and a bottom (114; 214) of the back pressure chamber (104; 204) a circumferential gap (115 215) through which inflowing liquid (2) is formed into an outer wall (116) of the tube (112; 212) and a wall (117; 217) of the back pressure chamber (104; 204) Rückstauraum (104, 204) flows. 5. Measuring device according to one of the preceding claims, characterized in that the inlet (102; 202) a Inlet opening (111, 211) and a tube (112; 212), wherein the tube (112; 212) to the inlet opening (111; 211), wherein a perpendicular to a Cross-section of the tube (112; 212) extending from the inlet opening (111; 211) to a circumferential lower edge (113; 213) and an interior of the tube (112; 212), in particular, extends to a bottom (114; 214) of the Backflow chamber (104, 204) in particular conical has a tapering course. 6. Measuring device according to one of the preceding claims, characterized in that a bottom (114; 214) of the Backflow chamber (104, 204) in particular below a The peripheral edge (113, 213) of the tube (112, 212) is designed as a baffle surface (P114, P214) with at least one elevation (265) and / or at least one depression. 7. Measuring device according to one of the preceding claims, characterized in that the measuring device (101, 201) comprises a screen (119, 219), wherein the screen (119, 219) starting from a bottom (114, 214) of the back pressure chamber ( 104; 204) about a tube (112; 212) towards the inlet (102; 202) over at least 50% of the height (H104) of the Backflow chamber (104, 204) and in particular at least 80% of the height (H104) of the back pressure chamber (104; 204) and preferably over the entire height (H104) of the back pressure chamber (104; 204). Measuring device according to at least one of the preceding claims, characterized in that the backpressure chamber (104; 204) and the settling chamber (109; 209) are connected by a first communication opening (121; 221) and in that the settling chamber (109; 209) and the measuring chamber (106; 206) is connected by a second communication opening (122; 222), wherein the settling chamber (109; 209) is formed as a channel (123) which extends from the first Communication port (121, 221) to the second Communication opening (122, 222) extends, wherein the Measuring chamber (106, 206) in particular one above a maximum level (FMA106) of the measuring chamber (106; 206) lying opening (124; 224). 9. Measuring device according to claim 8, characterized in that a bottom (167; 267) of the settling chamber (109; 209) is located approximately at a level (N214) of a bottom (114; 214) of the Backflow chamber (104, 204) extends and that transversely to an extension direction (R109; R209) of the settling chamber (109; 209) extending cross sections through the settling chamber (109; 209) in particular each have approximately a cross-sectional area and cross-sectional shape, which Cross-sectional area and cross-sectional shape of the first or second communication opening (121, 122; 221, 222). 10. Measuring device according to claim 8 or 9, characterized in that the calming chamber (109; 209) is arranged along a wall (117; 217) of the backflow chamber (104; 204) and in particular along a wall (140; 240) of the drain chamber (105; 205). 11. Measuring device according to claim 8 or 9 or 10, characterized in that at least one wall section (141a, 141b, 241a, 241b) of the settling chamber (109, 209) is provided with elevations (143) and / or recesses (144) in such a way, that propagation and / or formation of waves in the liquid (2) located in the settling chamber (109; 209) is impeded. 12. Measuring device according to at least one of the preceding claims, characterized in that a volume (V118) of a backflow chamber (118) of the backflow chamber (104; 204) is approximately 5 to 15 and in particular approximately 9 times as large as a volume ( V109) of the settling chamber (109; 209) and that the volume (V118) of the back pressure chamber (118) of the back pressure chamber (104; 204) is about 3 to 9 and in particular about 6 times as large as a volume (V106) of Measuring chamber (106; 206). 13. Measuring device according to at least one of the preceding claims, characterized in that the measuring device (101, 201) comprises an evaluation device, wherein the Evaluation device is designed in particular as a physically independent evaluation device and wired and / or is connected via radio to the level measuring device (107, 207) and / or the temperature measuring device (125, 225), wherein the evaluation device in particular has a display for Representation of the measurement results, wherein the Evaluation device, in particular a processor for Processing of the measurement results includes and wherein the Evaluation device comprises in particular a memory for storing the measured values. 14. Measuring device according to at least one of the preceding claims, characterized in that the orifice (108; 208) directs the liquid (2) into the discharge chamber (105; 205) in such a way that at least part of the outflowing liquid (2) opposes a temperature sensor (131; 231) one Temperature measuring device (125, 225) flows, wherein the Measuring device (101, 201) for this purpose, in particular a Guide device (139), wherein the guide device (139) in particular as a groove (138, 238) is formed, which below the diaphragm (108; 208) arranged and on the Temperature sensor (T2) is aligned so that the Guide (139) liquid (2) and this field Liquid (2) on the temperature sensor (T2) passes, wherein the temperature sensor (131; 231) in particular below and opposite to the diaphragm (108; 208) is arranged and in particular below the measuring chamber (106, 206) is positioned. 15. Measuring device according to at least one of the preceding claims, characterized in that a circumferential Wall (130; 230) of the measuring chamber (106; 206) extending over a height (H106) of the measuring chamber (106; 206) extending Breakthrough (130a; 230a) includes and that the Level measuring device (107, 207) comprises a printed circuit board (128, 228), by which the opening (130a, 230a) is closed in such a way that fill level sensors (129, 229) arranged on a lower side (128b, 228b) of the printed circuit board (128; in the measuring chamber (106; 206), wherein on the board (128; 228) in particular also a temperature measuring device (125; 225) is arranged with its temperature sensor (131; 231) and wherein the circuit board (128; 228) extends in particular to below a bottom (132; 232) of the measuring chamber (106; 206) and wherein the temperature sensor (131; 231) in particular below the bottom (132; 232) of the measuring chamber (106; 206) is arranged on the board (128; 228) such that it projects into the outlet (103; 203) of the measuring device (101; 201).