Measuring assembly and fluid adjusting and mixing device comprising same

Abstract

The present disclosure provides a measurement assembly and a fluid regulating and mixing device comprising the same, the configuration of the device being advantageously based on having at least one section consisting of a transducer in front of a measurement section, the section being configured to be coaxial with the measurement section and located outside the measurement section, and having a peripheral inlet from the front section to the measurement section to stabilize the fluid velocity field by forming a velocity pattern that is symmetrical with respect to the axis of the front conduit.

Description

Technical Field

[0001] The present disclosure is directed to a flow measurement assembly using an ultrasonic transducer positioned in a fluid channel segment, the length of which is reduced to achieve the fluid channel segment due to space and geometry constraints in the system incorporating the measurement assembly.

[0002] The present disclosure also relates to a flow rate regulating device comprising the flow rate measuring assembly. Background Art

[0003] Water consumption in sanitary systems is usually carried out through devices such as taps, showers, etc., which perform a mixture of cold and hot water to supply water at a temperature and flow rate selected by the user. The systems for mixing cold and hot water have evolved over time and an increasingly common solution is to regulate this mixing through electronic devices. These electronic devices acquire data on the supply status of each hydraulic supply pipe and regulate the flow rate in each hydraulic supply pipe to obtain the desired mixture.

[0004] The state parameters of the water in each of the hydraulic pipes can be obtained in a variety of ways, such as by measuring the supply water temperature of each hydraulic pipe by a temperature probe, or by measuring the supply water flow rate in each hydraulic pipe before mixing by a turbine, propeller and mechanical turbine or mechanical volume flow meter that generates a magnetic field. These measurements can also be made in the hydraulic pipes after the mixing point, thereby providing the user with information about the state parameters of the water mixed in the supply outlet pipe.

[0005] These sensor devices typically require reasonable time to correctly calculate the measured parameters, so ultrasonic transducers are instead and preferably used to measure the instantaneous average velocity and the instantaneous average temperature of a known fluid medium circulating through a pipe of known geometry, wherein the ultrasonic transducer is located in the pipe of known geometry.

[0006] The basic operating principle of an ultrasonic flow meter is to measure the difference in time required for a pair of acoustic pulses to travel a known distance in a known fluid in a pipe of known geometry, one acoustic pulse propagating downstream and the other acoustic pulse propagating upstream, that is, in the same direction and in opposite directions, and to calculate, from these time measurements, the instantaneous velocity and the instantaneous average temperature of the fluid passing through the pipe in the section where the measurements are made, as shown in Spanish patent application P201830599.

[0007] The measurement error of the system depends, among other factors, on the accuracy with which the time of flight of the sound pulse between the transmitter and the receiver is measured. Traditionally, the electronics dedicated to the measurement contain circuits designed for this purpose and implemented in semiconductor silicon. The absolute error in the measurement of the time of flight, expressed in units of time, is set by said circuits. The effect of the error on the measurement of the time of flight can therefore be reduced by increasing the duration of the time of flight of the sound pulse, and since the duration of the time of flight is directly related to the distance separating the transducers, so that the ultrasonic measurement system can measure the time of flight of the pulse between the two transducers with sufficient accuracy, the section of the pipeline on which the transducers are installed must have a minimum length that allows sufficient spacing between the transducers, so that the calculated errors are acceptable. This minimum length depends in each case on the electronic device performing the measurement, since some devices are more accurate than others.

[0008] The section where the ultrasonic measurement is carried out must have an inlet and an outlet that allow the fluid to circulate through the section. Turbulence and local disturbances in the measurement section are another factor that introduces errors in the instantaneous measurement and requires multiple measurements to calculate a sufficiently accurate average velocity. In the time-of-flight measurement section of the sound wave, where the distance between the positions of the opposing transducers is small, the local flow disturbances are mainly caused by changes in the direction of the fluid at the inlet and to a lesser extent at the outlet. The section measured with transducers may introduce sufficient errors in the instantaneous measurement to make it necessary to use multiple measurements, resulting in the above-mentioned undesirable effects. The calculation of these multiple average velocities leads to delays in obtaining accurate flow velocity results and affects the regulation dynamics of actuators that rely on these measures to regulate the flow in the hydraulic pipe, which has undesirable effects when it comes to highly dynamic measurement and regulation systems of fluid mixing.

[0009] From the above, it can be seen that in order to successfully implement a measurement section using the time-of-flight principle of acoustic waves, there needs to be a sufficient length of the measurement section and a flow velocity field within the measurement section, and the average stable flow velocity condition must be as stable as possible over time.

[0010] Therefore, a flow measuring device having an ultrasonic transducer can minimize the length of the measuring section, thereby keeping the measured value within an acceptable error range so as to ensure the regulation of the water mixing device. It is necessary to find a configuration of the inlet duct, measuring section and outlet duct of the fluid that produces as little disturbance and turbulence as possible in the measuring section. Utility Model Content

[0011] The object of the present disclosure is to provide a compact, reduced length measurement assembly for flow and / or temperature measurement, and a miniaturized water conditioning and mixing device for sanitary products, which solves the aforementioned disadvantages and provides other advantages as will be described below.

[0012] Therefore and in accordance with these objectives, with regard to a first aspect, the present disclosure is based on a measurement assembly, which is in a section of reduced length and compact structure, and which measures fluid flow and / or temperature, the measurement assembly comprising a group of fluid-conducting parts, the fluid-conducting section having at least one fluid inlet port leading to the measuring section and having a fluid outlet port of the measuring section, and a first ultrasonic transducer and a second ultrasonic transducer are oppositely positioned along the measuring section for measuring the flow rate and / or temperature.

[0013] Advantageously, in the present disclosure, the grouped segments of the measuring assembly have at least one front segment preceding the measuring segment, the front segment having a channel coaxial with the measuring segment, and the front segment being located outside the measuring segment.

[0014] A front section preceding the measuring section has a peripheral inlet leading to the measuring section, the peripheral inlet being located at the end of the front section opposite the fluid inlet port, in which the travel direction of the fluid is reversed.

[0015] The measuring assembly also advantageously comprises a measuring section coaxial and internally located with respect to the front section, the fluid entering the measuring section from the front section through the peripheral inlet, the measuring section comprising facing measuring transducers positioned along the axis of said measuring section.

[0016] Finally, and also a feature of the present disclosure, the measurement assembly comprises a fluid outlet port of the measurement section, the fluid outlet port being located at the end opposite to the peripheral inlet to the measurement section.

[0017] In this way, the measuring assembly is configured so that the fluid inlet of the measuring assembly is formed by a fluid inlet port, which is connected to a first fluid channel chamber formed by the front section located outside, and the first fluid channel chamber guides the flow of the fluid toward the end opposite to the fluid inlet port, so that the flow of the fluid enters the measuring section through the peripheral inlet. The fluid outlet of the measuring section is realized at the end opposite to the inlet of the measuring section and connecting the measuring section of the measuring assembly with the fluid outlet port.

[0018] This configuration with a front part located outside the measuring section and coaxial with the measuring section allows the flow velocity field to be stabilized, thereby forming a velocity pattern that is symmetrical with respect to the axis of the front conduit, enabling the passage of the fluid through the channel of the front section with a fluid velocity profile with a high degree of rotational symmetry. The entry of the fluid into the measuring section is - as previously described - carried out from the front part with a fluid velocity profile with a high degree of rotational symmetry through the peripheral inlet, allowing the fluid to also travel through the measuring section with a velocity distribution with a high degree of rotational symmetry.

[0019] This rotationally symmetrical velocity distribution induces much less turbulence in the fluid than would be caused by a configuration of the conduction and measurement conduits that would generate an asymmetrical velocity field with respect to the axis of the measuring section. This peculiarity makes the velocity field in the measuring section more stable over time than the velocity field obtained if the fluid inlet were present on one side of the measuring section, thus requiring fewer measurements to calculate a method allowing to obtain precise flow velocity and temperature values ​​of the fluid.

[0020] On the other hand, it is important that the average velocity of the fluid entering the measuring section is low in order to minimize the turbulence occurring in the measuring section. In the configuration of the disclosure described, by utilizing the entire periphery of the measuring section to cause the fluid to flow through the section before the measurement is made, the length of the inlet of the measuring section in the axial direction can be significantly smaller than for a section passing the fluid in a similar inlet. Thus, a significant reduction in the length of the measuring assembly is achieved with respect to the average velocity of the fluid in the inlet of the measuring tube, relative to the conventional configuration of the inlet through one side of the measuring section.

[0021] For clarity, configurations of facing transducers include arrangements of transducers positioned directly facing the axis of the measuring section, and other arrangements of transducers in known measuring sections, such as having mirrored and transverse positions to the flow, are possible but are not preferred due to complexity of component construction, higher cost and complexity.

[0022] In a possible embodiment of the present disclosure, the discharge of the fluid from the measuring section toward the outlet port is achieved through a peripheral outlet located at the end opposite to the peripheral inlet leading to the measuring section. The direction of travel of the fluid is reversed along the peripheral outlet to drive the fluid outward and make the fluid flow coaxially through the outlet section toward the outlet port.

[0023] In a preferred embodiment of the present disclosure, the coaxial front section located outside, the measuring section located inside, and / or the outlet section are circular in cross-section and coaxial with respect to the rotation axis of the front section, the measuring section, and / or the outlet section, and the front section is maintained as an annular channel chamber located outside the fluid relative to the measuring section, and the annular channel chamber is connected to the measuring section through a peripheral inlet.

[0024] This configuration as a rotational geometry of both the front section and the measuring section and / or the outlet section achieves maximum efficiency in stabilizing the fluid flow rate as the fluid flows through these sections.

[0025] Alternatively, according to a possible embodiment of the present disclosure, the front section, the measuring section, and / or the outlet section have a cross section of a polygonal geometry that is axially and coaxially symmetrical about the axis of these sections, and the front section is maintained as a fluid-containing polygonal annular channel chamber located outside the measuring section, and the polygonal annular channel chamber is connected to the measuring section through a peripheral inlet. For example, sections with channel cross sections of, for example, square, hexagonal or similar geometric shapes may be provided, although the efficiency of these sections is reduced relative to, for example, preferred and more effective sections with circular cross sections, and can also be used.

[0026] Alternatively, according to another possible embodiment of the present disclosure, the front section, the outlet section, and / or the measuring section may have a variable section that maintains coaxiality. For example, this allows a nozzle diffuser type configuration to be used in the measuring section to accelerate the flow, thereby obtaining higher accuracy in certain measurement ranges.

[0027] According to a preferred embodiment of the present disclosure, the measuring section, understood as the distance between the transducers, is between 30 mm and 100 mm. The size of this section and the above characteristics allow a compact measuring assembly without losing the effectiveness of calculating flow rate and / or temperature using the transducers.

[0028] Also preferably, the width of the coronal channel of the front section is between 3 mm and 10 mm.The width between the adjacent walls of the measuring section and the front section allows a flow with a velocity pattern that is rotationally symmetric in said channel.

[0029] Finally, and also preferably, the diameter of the channel of the measuring section is between 5 mm and 20 mm, which in turn allows the fluid to pass through and be measured by the transducer in said section with a symmetrical velocity pattern without increasing turbulence in said section.

[0030] According to an optional embodiment of the present disclosure, a flow directing element is positioned in the fluid channel section of the section before the measuring section, so that the flow is driven in the axial direction and the radial direction due to the geometric shape of the flow directing element and the influence on the fluid to improve the axisymmetry of the fluid velocity distribution from the fluid channel section. This allows the fluid to be regulated to enter the measuring section in an optimal state, thereby minimizing the imbalance caused by the fluid entering the front part through the side inlet port.

[0031] According to a possible embodiment of the present disclosure, flow directing elements are located in the front section before the measuring section, thereby significantly reducing the component of the fluid velocity vector in the plane perpendicular to the longitudinal axis of the front part and the measuring section. This allows the flow to be adjusted so that: in the velocity field of the fluid after passing through these elements, the axial component dominates and, moreover, the velocity field acquires a significant rotational symmetry with respect to said longitudinal axis of the measuring section.

[0032] Therefore, according to the purpose of the present disclosure, regarding the second aspect, the present disclosure is based on a fluid regulating and mixing device, the fluid regulating and mixing device comprising two or more fluid supply pipes, a flow regulating device for each of the fluid supply pipes, and a control system that receives information from at least one or more flow measurement components in each of the fluid supply pipes, the fluid regulating and mixing device comprising at least one measurement component according to the above-mentioned first aspect of the present disclosure, the flow measurement component being located in at least one of the fluid supply pipes and / or in at least one of the mixed water outlet pipes.

[0033] The advantageous configuration of the device for regulating and mixing a fluid allows making the device for regulating and mixing more compact and precise than can be obtained with geometric configurations known in the prior art. The possible incorporation of a measuring assembly in the mixed fluid delivery pipe has the following advantages: the measuring assembly can be used as a redundancy or safety measure for the measurement and / or limited control of the flow and / or temperature parameters of the mixed fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] For a better understanding of the description being made, a set of drawings are provided which show schematically and by way of example only a number of practical examples of implementation.

[0035] Figure 1 is a schematic cross-sectional view of a measuring assembly in a minimum length section without guiding or symmetry improving elements according to a possible embodiment of the present disclosure.

[0036] Figure 2a According to another possible implementation of the present disclosure Figure 1 Schematic cross-section of the same measuring assembly, Figure 2b It is a guide element that has been added to the channel section of the section before the measurement section, the guide element is preferably located at the beginning of the section before the measurement, reduces the non-axial velocity component of the flow and balances the axial component of the velocity vector, thereby increasing the rotational symmetry of the velocity distribution relative to the longitudinal axis of the section before the measurement.

[0037] Figure 3 According to another possible implementation of the present disclosure Figure 1 Schematic cross-sectional view of the same measuring assembly, where flow directing elements have been added in the axial and radial direction to the fluid channel portion of the section preceding the measuring section, thereby eliminating possible tangential components in the local velocity field.

[0038] Figure 4 According to another possible implementation of the present disclosure Figure 1Schematic cross-sectional view of the same measuring assembly, wherein an outlet of the measuring section towards the outlet port has been added by means of a coaxial outlet section and a peripheral outlet of the measuring section.

[0039] Figure 5 is combined with something similar to Figure 1 Schematic diagram of the measuring assembly of the fluid conditioning and mixing device.

[0040] Figure 6a and Figure 6b Two tables of flight time measurements of acoustic pulses under steady flow conditions for the coaxial configuration of the present disclosure compared to alternative configurations ("U-shaped" and "Z-shaped") (converted to relative errors in flow calculations ( Figure 6a ) or absolute error ( Figure 6b )), wherein the distance between the transducers of the alternative configuration manufactured according to the prior art solution is similar to the distance between the transducers of the prototype of the novel component. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present disclosure, possible implementation methods of the technical solution of the present disclosure are described below to facilitate a full understanding of the technical solution of the present disclosure. These implementation methods should be understood as non-limiting options that can be implemented in a similar or alternative manner.

[0042] However, it should be noted that the present disclosure can be implemented in ways different from those described in this application, and the specific protection scope of these implementations should not be limited. Those skilled in the art can make similar modifications without departing from the scope of the present disclosure.

[0043] from Figures 1 to 3 As can be seen in the figure, the present disclosure is based on a measuring assembly 10 for measuring the flow and / or temperature of a fluid, in this case water, which is in a section of reduced length and compact structure, and the measuring assembly for flow and / or temperature measurement is configured to be connected to a water conditioning and mixing device 100 located in a hydraulic water inlet pipe and / or outlet pipe.

[0044] The measuring assembly 10 comprises a fluid inlet port 15 for water from a corresponding hydraulic pipe, not shown in the figure, to the measuring assembly 10. The fluid inlet port 15 leads to the front section 12, which has a cylindrical configuration of a volume portion and an annular section, so as to guide water through the front section 12, which is located outside the inner section, both of which are coaxial with respect to the axis.

[0045] The front section 12 guides the water through the front section 12 to the end opposite to its inlet, which has a peripheral inlet 12' forming an inner coaxial section of the measuring section 11. In the peripheral inlet 12', the water changes its direction of travel to flow from the front section 12 located on the outside to the measuring section 11 located on the inside.

[0046] This configuration, common to all embodiments of the present disclosure, enables stabilization of the flow entering the measuring section 11 by providing the flow entering the measuring section 11 with a velocity pattern having a higher symmetry, the flow having much less turbulence than the flow in an inlet configuration with an inlet side elbow as known in the prior art.

[0047] The measuring section 11 is constructed as an inner cylinder, in which a first transducer 14 is arranged in a region corresponding to the peripheral inlet 12 ′, the first transducer 14 facing a second transducer 14 downstream, wherein the second transducer 14 is located in the fluid outlet region of the measuring section 11 .

[0048] according to Figure 1 , Figure 2a , Figure 2b and Figure 3 In an embodiment of the invention, the outlet towards the fluid outlet port 16 is formed laterally by an elbow, the fluid outlet port 16 being connected to the rest of the water circuit in which it is installed.

[0049] Alternatively, if Figure 4 As shown, the water outlet of the measuring section can be formed by connecting the water outlet to an external and coaxial outlet section, which has an annular cross-section and is connected through a peripheral outlet 12" located at the downstream end of the measuring section 11. At this peripheral outlet 12", the water changes direction and flows towards the fluid outlet port 16.

[0050] Figure 2a , Figure 2b and Figure 3 Although described below and according to the drawings with respect to a first possible embodiment indicated, the following supplementary and / or alternative embodiments are also possible in Figure 4 is implemented in the alternative embodiment shown.

[0051] In this regard, according to alternative embodiments of the present disclosure, and as Figure 2a As can be seen in FIG. 1 , a guide element 17 is provided in the front section 12 , which guides the flow in a plane orthogonal to the longitudinal axis of the front section 12 and the longitudinal axis of the measuring section 11 , thereby significantly reducing the component of the fluid velocity vector.

[0052] As an alternative or supplementary embodiment to the above-mentioned embodiment, Figure 3 As can be seen in the figure, in the area included in the peripheral inlet 12', flow directing elements 18 are provided that drive the flow in the axial direction and in the radial direction, thereby eliminating possible tangential components in the local velocity field. In this possible embodiment, these directing elements 18 are formed in a non-limiting manner by geometrical portions that guide the flow in the desired direction and in the direction in the peripheral inlet 12', and the flow follows these guiding geometrical portions so that the flow flows from the front section 12 to the measuring section 11.

[0053] Alternatively, instead of arranging the shown duct system elements 17 in the front section 12 , the orientation elements 18 can be arranged at the peripheral inlet 12 ′.

[0054] Alternatively, it is common to all embodiments that the measuring section 11 , the front section 12 , and a possible outlet section are not circular in cross section but polygonal, so as to maintain their coaxiality with respect to the axis.

[0055] Still alternatively, and identically to the possibilities described above, the front section 12 , the outlet section, and / or the measuring section 11 have variable sections that maintain coaxiality.

[0056] An optional and preferred configuration of the measuring assembly 10 is to use the measuring section 11 as a reference measuring section, which is understood as a distance between 30 mm and 100 mm between the transducers 14. In terms of the channel width of the circular crown of the outer channel of the front section 12, the channel width is between 3 mm and 10 mm. Finally, in terms of the diameter of the channel through which the fluid passes through the measuring section 11, the diameter is between 5 mm and 20 mm.

[0057] In a preferred embodiment, a combination of any of the above embodiments of the measuring assembly 10 is incorporated into a water conditioning and mixing device 100 which may be located at one or more inlets of a hydraulic pipe and / or in a hydraulic outlet pipe of a user supply device.

[0058] Tests were performed to verify the efficiency of a configuration of the measuring assembly 10 such as the first embodiment, as can be seen in Figure 6a and Figure 6bAs can be seen in the , it has been found that, by this innovative configuration and by the reduced length of the measuring section of the measuring assembly allowing a compact structure, the coaxial configuration of the measuring section and its front section, due to the technical features shown, allows the existence of a relative error, the data of the pulse measurement and flow calculation based on the actual flow passing through, marked "coaxial", which does not exceed 2%, while with reference to other embodiments known from the prior art - "U-shaped" and "Z-shaped" in the curve, in this 50 mm test, for the same distance between the transducers of different configurations, both at low and high flow rates, the error is higher. The measurements show that: the dispersion of the flight time measurements of the sound pulses in the steady flow state is lower compared to the known alternative configuration, where the distance between the transducers of the known alternative configuration is the same as the distance between the transducers of the prototype of the claimed assembly, which performs the "U-shaped" and "Z-shaped" measurements according to the solutions of the prior art.

[0059] This clearly demonstrates the validity of the ultrasonic measuring section configuration in which the supply channel is located before the measuring section and coaxially with the measuring section.

[0060] Although reference has been made to various specific embodiments of the present disclosure, it is obvious to those skilled in the art that the measurement assembly for flow rate and / or temperature measurement in a section having a reduced length and a compact structure and the water conditioning and mixing device including the assembly are susceptible to various changes and modifications, and that all the aforementioned details may be replaced by other technically equivalent details without departing from the scope of protection defined by the appended claims.

Claims

1. A measuring assembly in a section of reduced length and compact structure, wherein the measuring assembly measures flow rate and / or temperature, the measuring assembly comprising a set of fluid conducting sections, the fluid conducting sections having at least one fluid inlet port leading to the measuring sections and having a fluid outlet port of the measuring sections, and having first and second ultrasonic transducers oppositely positioned along the measuring sections for measuring the flow rate and / or the temperature, It is characterized in that The measuring component (10) comprises at least: - a front section (12) preceding the measuring section (11), the front section (12) having a channel coaxial with the measuring section (11), and the front section (12) being located outside the measuring section (11); a peripheral inlet (12') of the front section (12), the peripheral inlet (12') opening into the measuring section (11), the peripheral inlet (12') being located at the end of the front section (12) opposite the fluid inlet port (15), in which peripheral inlet (12') the direction of travel of the fluid is reversed; - a measuring section (11) coaxial and internal to said front section (12), The fluid enters the measuring section from the front section through the peripheral inlet, The measuring section (11) comprises facing measuring transducers (14) positioned along the axis of the measuring section (11); and - a fluid outlet port (16) of the measuring section (11), the fluid outlet port (16) being located at the end opposite to the peripheral inlet (12') leading to the measuring section (11); wherein the fluid inlet of the measuring assembly (10) is formed by the fluid inlet port (15), the fluid inlet port (15) being in communication with a first fluid channel chamber formed by the front section (12) located outside, the first fluid channel chamber directing the flow of the fluid toward an end opposite to the fluid inlet port (15), Thereby, the fluid enters the measuring section (11) through the peripheral inlet (12'); wherein the fluid output from the measuring section (11) is realized at the end opposite to the peripheral inlet (12') of the measuring section (11) and connecting the measuring section (11) of the measuring component (10) with the fluid outlet port (16).

2. The measuring assembly according to claim 1, characterized in that The discharge of the fluid from the measuring section (11) toward the fluid outlet port (16) is achieved through a peripheral outlet (12"), which is located at the end opposite to the peripheral inlet (12') leading to the measuring section (11), and the travel direction of the fluid is reversed along the peripheral outlet (12") to guide the fluid to flow outwardly and coaxially through the outlet section toward the fluid outlet port (16).

3. The measuring assembly according to claim 1 or 2, characterized in that: The front section (12), the measuring section (11), and / or the outlet section connected to the fluid outlet port of the measuring section are circular in cross section and coaxial with respect to the rotation axis of the front section (12), the measuring section (11), and / or the outlet section, and the front section (12) is maintained as an annular channel chamber for the fluid located outside the measuring section (11), and the annular channel chamber is connected to the measuring section (11) through the peripheral inlet (12').

4. The measuring assembly according to claim 1 or 2, characterized in that: The front section (12), the measuring section (11), and / or the outlet section connected to the fluid outlet port of the measuring section have a cross-section of a polygonal geometric shape that is axially and coaxially symmetrical about the axis of the front section (12), the measuring section (11), and / or the outlet section. The front section (12) is maintained as a polygonal annular channel chamber for the fluid located outside the measuring section (11), and the polygonal annular channel chamber is connected to the measuring section (11) through the peripheral inlet (12').

5. The measuring assembly according to claim 1 or 2, characterized in that: The front section, the outlet section connected to the fluid outlet port of the measuring section, and / or the measuring section have a variable section that maintains coaxiality.

6. The measuring assembly according to claim 1, characterized in that The measuring section (11), understood as the distance between the transducers (14), is between 30 mm and 100 mm.

7. The measuring assembly according to claim 1 or 2, characterized in that: The width of the coronal channel of the front section (12) is between 3 mm and 10 mm.

8. The measuring assembly according to claim 1 or 2, characterized in that: The diameter of the channel of the measuring section (11) is between 5 mm and 20 mm.

9. The measuring assembly according to claim 1 or 2, characterized in that: A flow directing element (18) is positioned in the fluid channel section from the front section (12) to the measuring section (11), so that the flow is driven in the axial direction and the radial direction due to the geometric shape of the flow directing element (18) and the influence of the flow directing element (18) on the fluid, so as to improve the axial symmetry of the fluid velocity distribution from the fluid channel section.

10. The measuring assembly according to claim 1 or 2, characterized in that A guide element (17) is positioned in the front section (12) before the measuring section (11). Due to the geometric shape of the guide element (17) and the influence of the guide element (17) on the fluid, the guide element (17) guides the flow, thereby significantly reducing the component of the fluid velocity vector in the plane orthogonal to the longitudinal axis of the front section (12) and the longitudinal axis of the measuring section (11).

11. A fluid regulating and mixing device, comprising two or more fluid supply pipes, a flow regulating device in each of the fluid supply pipes, and a control system receiving information from at least one or more flow measurement components in each of the fluid supply pipes, characterized in that: The fluid regulating and mixing device (100) comprises at least one measuring assembly (10) according to any one of claims 1 to 10, which is located in at least one of the fluid supply pipes and / or in at least one of the mixed water outlet pipes.

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