RU2778661C1 - Adjustment device and method for determining valve hydraulic threshold value - Google Patents

Abstract

FIELD: adjustment devices.

SUBSTANCE: present invention relates to adjustment device for temperature dependent, self-adjusting adjustment of a flow control valve in a tempering system, and to a corresponding method with particular attention to the functionality of determining the hydraulic threshold of the valve. Proposed adjusting device (1) for the valve (2) flow control, which can determine the threshold value of the hydraulic position (S_{V-hydraulisch-min}) minimum opening along the stroke. The control device (1) registers the flow rate based on the change in the temperature of the heat carrier in the consumer circuit (3) and iterates the various opening positions. The determination is extended to a plurality of external tempering requests, with skipped determination iterations that have not yet been saddled after the activation of the adjustment device (1) between tempering requests, continuing with new activations of the adjustment device (1).

EFFECT: creating an adjustment device and a corresponding method for self-adjusting the flow control valve, which provide an alternative definition of the hydraulic threshold value for the flow control valve.

24 cl, 7 dwg

Description

The present application relates to a control device for temperature dependent, self-adjusting adjustment of a flow control valve in a tempering system, and to a corresponding method, with particular attention to the functionality which consists in determining the hydraulic threshold value of the valve.

Additional parts of the subject matter of this patent application are based on the applicant's application DE 10 2017 123 560 A1. The present invention is based on unpublished internal knowledge and improvements derived from the development of novel products based on the said patent application of the applicant. Thus, the parts of this disclosure, the drawings and the corresponding claims include parts of the former subjects of the application, the essence of which is referred to here.

The technical basis of the invention lies in the use of space heating and air-conditioning installations such as, in particular, underfloor heating, panel heating or underfloor cooling, which are installed in the building in order to be able to select a weather-independent room temperature.

Numerous control systems and methods are known in the prior art regarding heating structures for a comfortable and efficiency-oriented distribution and control of heat energy via a hydraulic network in a building, and similar installations in buildings are also known for the distribution and control of energy for air conditioning, respectively, the removal of heat from rooms. .

Techniques for performing hydraulic equalization are known from the prior art, which provide for recording the return flow temperature on the heat exchanger and controlling the volumetric flow rate through the heat exchanger depending on the return flow temperature. In one alternative, the temperature difference between the supply flow temperature and the return flow temperature is determined. A control error occurs between the measured temperature difference and the nominal value of the constant temperature difference. The volumetric flow rate through the heat exchanger is adjusted according to this mismatch in order to bring the return flow temperature closer to the nominal value of the constant temperature difference, ie the predetermined constant temperature difference.

The above application DE 10 2017 123 560 A1 describes an application of a control device and a method for self-adjusting adjustment of the flow rate in consumer circuits with a heat exchanger, which is based on the calculation of the application-optimized temperature difference between the inlet water temperature and the return water temperature, that is, the variable setpoint temperature difference in each consumer circuit. In this case, the control device is the most important component of the tempering system, in which the corresponding method is executed, and has an automatic room temperature controller associated with it. Calculation of the variable temperature difference is used for self-adjustment of the operating mode in the individual environment of the heat exchanger installation. Entering the obtained heating time equalizes situations in different places in the building, such as floors, basement or exterior walls, as well as conditions around the installation, and allows you to quickly optimize the temperature of the rooms yourself within the effective range. Many of the relevant control devices are designed without the need for a central control unit, ensuring that the distribution of the individual flows in the consumer circuits meets the needs.

The present invention is focused on determining the hydraulic position of the minimum opening of the valve, after which the flow rate through the consumer circuit matched with the valve is provided. Programming such a hydraulic valve threshold serves to actuate, respectively, the calibration of the adjusting device to the type of valve used, or to a variable wear condition of the valve seal, thereby increasing the accuracy and speed of regulation for valve adjustment.

In general, the so-called flow rate control valves, which are used in the heating circuits of a heating installation such as floor heating and other tempering installations such as chilled floors or the like, have a seal. The seal closes the flow of the heat transfer fluid in the closed position of the valve, for example when there is no need for tempering by means of a matched consumer circuit and its heat exchangers. The seal can be placed on the valve body, respectively, the valve disc, which is shifted by means of the valve stem. As a rule, the seal consists of an elastic material, such as rubber. As the valve disc rises above the valve seat, within the resulting valve gap, the compression of the seal is reduced, but the seal has not yet released flow through the valve gap. Due to the elastic property of the material, there is thus an area acting with sealing along the stroke of the valve. Above the hydraulic threshold value, which must be determined as follows, under the hydraulic pressure applied upstream of the valve, a minimum flow of the heating medium occurs. In the adjacent hydraulic region along the valve travel, limited flow through the valve increases.

In order to ensure energy-efficient fine control of the heating circuits or consumer circuits in the tempering system, the control action of the self-adjusting control device can be optimized when it can return to a value that corresponds to the minimum, respectively, the smallest known opening position.

The corresponding threshold value of the valve stroke between the hydraulic region and the sealing-acting region, in which the leakage is practically stopped by the valve seal, is individual. The corresponding transition is expected to occur within the lower half of the valve travel, however the absolute value is unknown in principle, as it depends both on any compatible valve type and on seal wear or aging.

In the above technique, the location of the valve and the temperature sensor for the supply temperature is preferably provided in such a way that the valve is installed on the supply distribution pipeline, that is, in the direction of flow in front of the agreed consumer circuit, and the temperature sensor for the supply temperature is placed on the section of the pipeline outlet from the supply distribution pipeline , that is, in the direction of flow after the valve in the initial region of the consumer circuit. Registration of the flow rate on the valve or the agreed pipeline is not carried out. The regulation is achieved by comparing the recorded temperatures at the beginning and at the end of the consumer circuit, leading to the conclusion whether there is a flow rate in the consumer circuit.

A possible approach to a solution for this control could be that, as part of the initialization of the control device, which is carried out by a qualified installer after installation and before the first start-up, the hydraulic threshold value of the applied valve is programmed. In this case, the adjusting device slowly opens the valve, based on the closed position, while monitoring the temperature difference at the beginning and at the end of the consumer circuit. As soon as the recorded temperatures of the flowing heat carrier flow can be ascertained, a hydraulic threshold value is set at the corresponding control value of the valve. After completing the initialization process, the qualified installer leaves the control device for control mode in the tempering system.

However, this solution approach has a number of different disadvantages. Initialization for programming (learning) valve thresholds must be done or monitored by the installer. The process must be carried out by the installer after installation on each control device of each valve of the distribution pipeline, respectively, the distribution of the heating circuit separately. As a result, corresponding costs and expenses arise before the tempering system is put into operation.

The more precisely the threshold value is determined, the slower the valve opening speed should be, also because the thermal response to a low flow rate in the consumer circuit, based on temperature registration, is delayed. If done carefully, an installer's workload for programming (learning) the hydraulic threshold value of a valve in use can add up to almost an hour of his working time.

In addition, by the time of initialization, all components of the tempering system must be ready for operation, and all energy and current supply connections must already be connected by the public utilities. The insulation of the building must also be completed. Otherwise, apart from the installation of the distributor of the heating circuit in the building, a special intervention by the installer would be required at a later time when the tempering system was put into operation.

It is an object of the invention to provide an adjustment device and a corresponding method for self-adjusting adjustment of a flow control valve, which provide an alternative determination of the hydraulic threshold value for the flow control valve.

This problem is solved by means of the distinguishing features of the adjusting device according to paragraph 1 or 2 of the claims, and the distinguishing features of the method according to paragraph 13 or 14 of the claims.

Adjusting (adjusting) device for self-adjusting adjustment of the flow control valve is characterized, in particular, in that it is designed to determine the hydraulic position of the minimum opening of the flow control valve, at which the minimum flow (flow) can be registered, during the working stroke; and the adjusting device registers the flow (flow) through the flow control valve based on the temperature change of the coolant in the consumer circuit; wherein determining the hydraulic minimum opening position includes iterating through various opening positions along the travel of the flow control valve; each iteration of the flow control valve opening position includes at least one flow registration through the flow control valve; and the determination of the hydraulic minimum opening position is extended to many external consumer circuit tempering requests, and the missing determination iterations, which have not yet been made after the activation of the adjuster between tempering requests, continue with new activations of the adjuster.

The self-adjusting flow adjustment method according to the invention is characterized in particular by the steps of: determining the hydraulic position of the minimum opening of the flow control valve at which the minimum flow can be registered along the stroke; by registering the flow through the flow control valve based on changes in the temperature of the coolant in the consumer circuit; wherein determining the hydraulic minimum opening position includes iterating various opening positions along the travel of the flow control valve; wherein each iteration of the open position of the flow control valve includes at least one flow registration through the flow control valve; and the determination of the minimum opening hydraulic position is extended to many external consumer circuit tempering requests, and the missing determination iterations, which have not yet been made after controller deactivations between tempering requests, continue with new controller activations.

The invention for the first time provides for independent determination of the hydraulic threshold value of the flow control valve by means of an adjusting device, which, after commissioning the timed tempering system, is carried out during the tempering operation.

In its general form, the invention is based on the idea of performing, over many tempering requests, which lead to the discovery of a flow (flow) through the consumer circuit, a successive approximation of the threshold value to be determined automatically (independently) by means of an adjusting device during current operation.

An external request for tempering within the meaning of this disclosure is made, for example, by a thermostat which issues a signal, for example a binary ON/OFF signal, to activate the control device. For example, a room thermostat issues a request to heat up the floor heating system and activates on the heating circuit manifold the control device of the flow control valve, which is matched to the floor heating system in the respective room. The flow control valve opens the corresponding consumer circuit and regulates the flow so that the room temperature approaches the nominal temperature set by the user on the room thermostat.

As an alternative to a thermostat, activation of the control device can also be carried out by means of another setting means, such as a switch, with which the user can directly issue a temperature request to the control device.

The invention has the advantage that the control device can independently program (teach) the threshold value of the flow control valve after the tempering system has been put into operation. This means that no labor costs for the installer are required.

The determination of the hydraulic threshold value is done in a timed manner over many tempering requests. This does not require initialization/calibration of the control device before the first commissioning, for which all other conditions of the tempering system must be ensured as being in a state of readiness for operation. The installation of the control device and the commissioning of the tempering system are separated in time. It is thus immaterial for the determination of the hydraulic threshold value according to the invention whether the control device was installed, for example, during the finishing of the building in summer, and only activated for the first time during the heating period in autumn.

In addition, the invention has the further advantage that the determination of the hydraulic threshold is suitable so that it can be repeated regularly. The adjusting device thus makes it possible, in principle, to adapt itself to changes in the hydraulic threshold value, which are caused by valve replacement, wear or aging of the seal.

Preferred improvements of the present invention are the subject of the dependent claims.

According to one aspect of the invention, the first iteration may begin at a hydraulic opening position at which flow through the flow control valve is to be expected; and the control device may shift the flow control valve opening position for the next iteration towards the flow control valve closed position when flow through the flow control valve is detected. Thus, actuation of the tempering system is not disturbed primarily by the steps for determining the hydraulic minimum opening position, i.e. in particular the flow for the first heating request is not blocked due to the first iteration of the opening position of the flow control valve.

According to one aspect of the invention, the adjusting device can make the adjustment of the flow control valve opening position for the next iteration offset opposite to the direction of the flow control valve closed position when no flow through the flow control valve is detected. By two-sided iterative approximation, the hydraulic position of the minimum opening can be determined relatively accurately.

According to one aspect of the invention, the adjusting device may shift the opening position of the flow control valve on the next iteration by a portion of the stroke that corresponds to half the value of the shifted portion on the previous iteration. In this iterative approximation, large portions of the stroke are first reserved and taken into account in the definition. In this way, the hydraulic position of the minimum opening in relation to the number of iterations of the opening positions can be determined relatively quickly.

According to one aspect of the invention, the control device can determine the hydraulic minimum opening position within a predetermined number of iterations of the various opening positions of the flow control valve. Thereby, the duration of the determination can be limited depending on the predetermined resolution, respectively, the accuracy of the hydraulic threshold value in an efficient and simple way.

According to one aspect of the invention, when flow through the flow control valve is not detected, iteration of the corresponding opening position may also include detecting leakage at a higher opening position of the flow control valve. Therefore, it can be verified by comparison whether no leakage has actually been detected due to the substantially closed flow area. In particular, it can be ruled out that the detection of no leakage is not due to another possible cause, such as an erroneous interpretation of the effect of a detected temperature change or a pump failure.

According to one aspect of the invention, each iteration may include a predetermined number of registrations of flow through the flow control valve at the open position of the flow control valve. In this way, a result can be repeatedly checked and ensured whether there is a leak by many successive closings and new settings of a given opening position, and by detecting a leak, before the determination is continued in the next iteration at an additional opening position. In the case where no leakage occurs at the opening position, the iteration may include, for example, twice the number of leak detections, i.e. the opening position, the leakage can be prepared from the system side, respectively, registered by temperature measurement.

According to one aspect of the invention, between each iteration of the open position, between each detection of a leak within the iteration of the open position, and/or between activation and continuation of non-performed determination iterations, a predetermined blocking period may first be provided for which the flow control valve closes, and/ or the temperature is not recorded. This takes into account the thermal inertia of the components, nodes and circuits in the tempering system, which affect the response (trigger) characteristics of the temperature measurement and can, above all, have a negative effect on the temperature change detection in the consumer circuit or distort it.

According to one aspect of the invention, the continuation of the interrupted iteration of determining the minimum opening hydraulic position may be temporarily interrupted for a tempering request; when no flow through the flow control valve was registered in the open position during the interrupted iteration. The functionality for determining the hydraulic position of the minimum opening is thus temporarily subject to the requested tempering requirement in order to keep as little as possible a violation of comfort for the user during the determination.

According to one aspect of the invention, the control device can perform the determination of the hydraulic position of the minimum opening when it has been separated from the current supply, and/or when dismantling has been provided in relation to the flow control valve by means of an actuator. In this way, the control device can independently carry out initialization after possible changes in the tempering system.

According to one aspect of the invention, the adjusting device may perform a determination of the hydraulic minimum opening position when a predetermined repetition interval has elapsed. In this way, the adjusting device can independently calibrate periodically to the changing state of the valve.

The invention, as well as a suitable technique for transforming the invention, will be better understood from the description of the figures in relation to the accompanying drawing, the same reference numbers being used for the same subjects, in which:

Fig. 1 shows a diagram in which a characteristic curve of a flow rate and a valve stroke for a flow control valve are plotted along the axes;

2 shows a chart showing the distribution (scatter) of a hydraulic threshold relative to minimum flow across various flow control valves and a calculated hydraulic threshold at a particular flow control valve in relation to valve travel;

Fig. 3 shows a diagram that iterates through various opening positions along the valve stroke from determining the hydraulic minimum opening position according to one embodiment of the invention;

4 shows a flowchart that explains the theoretical solution of a certain result after a predetermined number of iterations;

Fig. 5 shows a sectional view of a flow control valve;

6 shows a tempering system with control devices in the switchgear, thermostats and additional system components; and

7 shows a block diagram that represents the components of the system for self-regulation.

Next, an exemplary embodiment of the inventive operation for determining the hydraulic minimum opening position of the flow control valve 2 will be described with reference to Figures 1-4, which is executed on the control device 1 in the tempering system 10, which are shown in Figures 5-7.

The hydraulic minimum opening position in the sense of this description is the opening position in which there is an adjustable minimum flow. However, it is not necessarily required that in this opening position there is the lowest absolute flow rate, which can be adjusted or executed accordingly. It is important that the consumption is ensured and that it turns out to be as small as possible within the framework of the approximation. On the one hand, the approach to the lowest absolute flow rate is limited by the indirect measurement technique, which in relation to the device performs not a flow measurement, but a temperature measurement. On the other hand, for the practical action (mode) of regulation, the approximation to the lowest absolute flow rate is sufficient until the remaining tolerance, and can preferably be completed thereafter to limit costs. It is important that the remaining tolerance remains within the hydraulic range, and not within the sealing range of the valve travel, so that flow is maintained at an approximate hydraulic minimum opening threshold. The determined threshold value is then used as the hydraulic minimum opening position in the control device 1 for the control action.

The stroke of the flow control valve 2 in the sense of this disclosure is the absolute portion of the valve stroke, that is, the stroke between the fully closed position S _V-min , in which the valve body or valve disc 24 rests on the valve seat 25 as a result of prestressing , and a fully open position, in which the flow cross-section by means of the valve disc 24 is completely or as far as possible to adjust, overcoming the prestress, is released. In addition, in the sense of this disclosure, the fully closed position S _V-min of the flow control valve 2 is the location at which the actuator 6 of the control device 1 comes into contact with the valve stem 23, that is, at the point before the start of the valve stroke.

An external tempering request, which leads to the activation and later deactivation of the control device 1 on the flow control valve 2, in the sense of this disclosure, is the need for temporary tempering power in order to maintain the desired temperature, in particular the room temperature. Such a demand is determined by the user or by the thermostat 12 and is manifested by means of a signal to activate the control device 1. The corresponding signal is, for example, a control voltage which is at a high level during the tempering demand and at a lower level after the demand, respectively zero. level.

In the case of thermostat 12, the tempering request is executed by thermostat 12 after the user sets or changes the nominal temperature, which is different from the actual temperature. More often, for example in the form of a regular clock, tempering requests are executed by the thermostat 12 while maintaining the actual temperature, which has already been brought to the nominal temperature. The maintenance of the state is carried out, as a rule, within the temperature fluctuation around the nominal temperature, which is simulated by a pulsating supply of tempering power. To do this, the thermostat 12 is periodically triggered at intervals of the flow of the coolant through the corresponding consumer circuit 3, respectively, the heat exchanger 30, in order to activate and deactivate the control device 1 phase by phase. The duration of such clocking depends on the design (for example, bimetallic, respectively, analog or digital) or the type of thermostat 12. Thermostats 12 short clock types can be programmed to maintain temperature with activation times for tempering requests and deactivation times between tempering requests that can be in the range of 15 or 10 minutes, or less if required. Thermostats of 12 types of long-term clocking can be designed for corresponding durations in the range of a few hours, for example, 4 hours.

As will be explained later, each flow control valve 2 is located in front of each consumer circuit 3, respectively, at the beginning of it, as shown in Fig.6, and regulates the flow of the heat transfer fluid through the consumer circuit 3. The opening position of each flow control valve 2 is set in each case by the autonomously controlling control device 2 in a decentralized manner, i.e. in particular not by the central control unit of the tempering system 10, by comparing the temperatures of the flowing heat carrier at the beginning and at the end of the consumer circuit 3. The adjusting device 1 is designed for the installation of a standard type valve, which is preferably installed on the distribution pipes of the distributors of the heating circuit.

Registration of temperature change means registration in time of temperature gradients of the coolant in the position of the temperature recorder 7 on the consumer circuit 3, preferably the temperature recorder 7 at the beginning of the consumer circuit 3 after the flow control valve 2. In the volatile memory or random access memory (RAM) of the microcomputer or the calculator 8 of the control device 1, for example, a temperature change of over a minute is recorded. For example, at a duration of more than a few tens of seconds or a minute, a gradient of the recorded temperature change is formed and compared with a predetermined gradient, for example, ±1 or ±2 K/min.

When a significant temperature change occurs, i.e., the registered gradient is higher than the predetermined gradient, this temperature change should occur because the volume of the heat transfer fluid in the consumer circuit 3 has been replaced in the position of the temperature recorder 7 by bypassing the heat transfer volume from the tempering device 4 . As a consequence, at this opening position, leakage occurs to the flow control valve 2 .

When no change in temperature is detected, that is, the gradient is substantially 0 K/min, the volume of the heat transfer fluid, of course, still remains at the position of the temperature recorder 7, and has not been replaced by the overflow volume of the heat transfer fluid. There is thus no leakage at the flow control valve 2 in this opening position.

In addition, a transition region of the gradient can be defined, in which the detection of a slight change in temperature does not allow reliable detection of leakage. When the detected gradient is, for example, in the range of a few tenths of a degree Kelvin per minute, the temperature change could also be caused by another external cause, such as cooling or an equalization between the heat capacities of the liquid-conducting components in the tempering system 10. In this case, the registration result is discarded.

The inventors of the present invention have tested numerous commercially available examples of flow control valves 2 that are compatible with the control device 1 in terms of standard measurements in terms of the transition between the seal-acting area and the hydraulic area compared to the valve stroke, and analyzed the relevant parameters in in terms of the functionality of the control device 1 according to the invention.

Thus, FIG. 1 shows a diagram in which the flow rate in the flow control valve 2 is plotted on the vertical axis in relation to the stroke of the valve. With the exemplary characteristic curve of the investigated flow control valve 2 shown in FIG. 1, it can be understood that within the travel range of 0 to 0.25 mm no flow of the heating medium takes place. In the region from 0.25 mm to about 2 mm, the flow rate initially increases to about 0.7 mm approximately linearly, then becomes flat. As a result of opening at a working stroke of about 2.0 mm, the flow stops at a maximum.

Various examples of commercially available flow control valves 2 that are suitable for use with the adjusting device 1 differ with respect to the characteristic curve presented, however, they are correlated in terms of the shape of the characteristic curve. From this correlation, for the functionality of determining the hydraulic threshold value of the valve to which the hydraulic minimum opening position is matched, the respective areas along the stroke of the flow control valve 2 were determined.

2 shows a comparison between the adjustment action before the minimum opening hydraulic position threshold has been determined and the adjustment action after the minimum opening hydraulic position threshold has been determined.

First, by means of the illustration on the left side, the distribution of the stroke is explained, to which the adjusting device 1 returns when the hydraulic minimum opening position has not yet been finally determined. At the lower end of the stroke, the actuating element 6 of the adjusting device 1 comes into contact with the flow control valve 2. In this area, the control device 1 detects that it is connected to the flow control valve 2, respectively, the installation state of the control device 1 takes place. Beyond this follows at some distance the area in which the hydraulic threshold value of the valve, to which the hydraulic minimum opening position is assigned, was found by examining various designs of standard, compatible flow control valves. The scatter of the threshold values of the investigated valves shows the area in which the adjusting device 1 is found to provide the expected determination of the hydraulic position of the minimum opening along the stroke. The opening area is defined above, in which, based on the study, as one would expect, a significant width of the range of hydraulically limited open positions S _{V-hydraulisch} can be established. Above is the uppermost region of the stroke, in which the flow rate control valve 2 is substantially unthrottled, that is, hardly limited or unrestricted flow occurs.

The image on the right side shows the stroke distribution to which the adjusting device 1 returns when the threshold value of the hydraulic minimum opening position has been determined. It is determined by a certain threshold value how far the sealing-acting area of the fully closed position S _V-min extends over the course of the stroke. This found fact makes it possible to fine-tune small flow rates up to the critical area of the valve clearance during tuning. In addition, it has been found that above the threshold value of the minimum opening hydraulic position S _{V-hydraulisch-min} , a region extends in which a significant range width of the hydraulically limited opening positions S _V -hydraulisch-min can be set. In addition, it has been found that a substantially open opening position can be set in the rest of the upper region of the stroke.

In the fully closed position S _V-min , the actuating element 6 of the adjusting device 1 is connected to the valve stem 23 without the application of force. In the higher opening position, the valve disc 24 rises above the valve seat 25, overcoming the prestress, although the seal still closes the valve gap. That is, in the region defined as the seal-acting region, it should be assumed that the compression of the seal in the valve gap is reduced or removed, however, the opening in the valve gap is not substantially yet opened, which would allow the flow of the heat-transfer fluid under applied pressure. In the region of the hydraulically limited positions S _{of the V-hydraulisch} opening, it has been ensured within the scope of the definition that a leak occurs and that it increases along the overlying stroke.

The absolute value of the hydraulic position S _{V-hydraulisch-min} of the minimum opening varies not only depending on the valve, but also on aging and seal wear. Stroke value ranges in the left image, which are based on the correlation of the values in the studies carried out of the various flow control valves 2 available, can be pre-stored in the memory of the control device 1. The values are chosen so that with any choice of a compatible, standard flow control valve 2 the predetermined effective sealing or hydraulic restraint characteristic was reliable, or at least was effective with a high probability.

There is no leakage in the area of the working stroke which is active with sealing through consumer circuit 3. As a result, the control logic, which is not based on the measurement of the actual flow rate, but on the comparison of the temperatures of the expected flow, may be disturbed. The control logic of the control device 1 would lead to a control-related dead end, in which the flow is always additionally throttled, while the recorded temperature difference remains unchanged due to insufficient flow. By means of the additional functionality of the adjusting device, which is the subject of a patent application filed at the same time, and which is oriented to the hydraulic threshold value, preferably to the minimum opening hydraulic position S _{V-hydraulisch-min} determined according to this disclosure, such a failure is excluded, respectively, causes related to regulation are excluded. impasse.

3 shows on the vertical axis the stroke relative to the common movable section S _V of the flow control valve 2, on which the adjusting device 1 determines the minimum opening hydraulic position S _{V-hydraulisch-min} . The horizontal time axis shows the positive results p and the negative results n in relation to flow registration.

Next, the determination of the minimum opening hydraulic position S _{V-hydraulisch-min} during the iterations of FIG. 3 will be described. The adjusting device 1 makes a determination in the lower half of the stroke, in which, as expected, the hydraulic position S _{V-hydraulisch-min} of the minimum opening takes place. At the beginning of the definition, the adjusting device 1 according to this embodiment is in the state of the first iteration of the opening position of the flow control valve 2, which corresponds to half S _{V-hydraulisch} /2 of the entire section S _V of the stroke.

Thereafter, an unshown blocking time of a few minutes, eg 5 minutes, elapses so that thermal inertia is experienced which affects the response characteristics of the temperature measurement. After that, a measurement is carried out, whether the temperature of the coolant has changed significantly or not at the beginning and at the end of the consumer circuit 3. When a change in temperature is measured that exceeds predetermined gradients, for example ±1 or ±2 K/min, it is considered that the heat transfer fluid is not stationary in the consumer circuit 3 in the area of the temperature recorder 7 . Moreover, it is assumed that a portion of the coolant that comes from the tempering source 4 now passes the flow control valve 2 and flows into the consumer circuit 3, that is, leakage occurs, and this is determined as a positive result p of the flow registration for the first iteration.

After receiving a positive result p, the adjusting device 1 is transferred to the second iteration of the opening position of the flow control valve 2, which corresponds to a quarter S _{V-hydraulisch} /4 of the entire section S _V of the stroke. Thereafter, the process from the first iteration is repeated with respect to the execution of the blocking period and the temperature measurement to record the flow rate, which again leads to a positive result p.

After receiving a positive result p, the adjusting device 1 proceeds to the third iteration of the opening position of the flow control valve 2, which corresponds to the eighth part S _{V-hydraulisch} /8 of the entire section S _V of the stroke. Thereafter, the process is repeated with respect to execution of the blocking period and measuring the temperature to record the flow. In the third iteration, no significant temperature change is measured. In order to rule out that the reason for the lack of leakage, respectively, the lack of temperature change, is not due to the tempering system 10, such as, for example, the shutdown of the pump 5 or the nightly decrease in the supply temperature, the control device 1 carries out a comparative measurement within the same iteration. To do this, the control device 1 temporarily opens the flow control valve 2 to a hydraulic opening position that allows flow, for example, to the opening position of the previous iteration with a positive result p. After that, the adjustment device 1 waits out the blocking period, and then conducts a second registration for verification. When the flow rate is recorded in the comparative measurement, it means that there is no error on the part of the system. On the other hand, this at the same time means that the lack of leakage at the first registration was due to blockage of the duct cross section at the set opening position in the third iteration. In view of this, a negative result n is determined for the third iteration.

After a negative result n, the adjusting device 1 proceeds to the fourth iteration of the opening position of the flow control valve 2, which is greater than the opening position in the third iteration, namely, half the range of change before the third iteration. This value is in the middle between a quarter of S _{V-hydraulisch} / 4 and an eighth of S _{V-hydraulisch} / 8, that is, with three sixteenths of S _{V-hydraulisch} / 3/16 of the entire section S _V of the stroke. Thereafter, the process is repeated with regard to holding a blocking period and measuring the temperature to record the flow, which again leads to a positive result p.

After obtaining a positive result p, the adjusting device 1 proceeds to the fifth iteration of the opening position of the flow control valve 2, which is smaller than the opening position in the fourth iteration, namely, half the change before the fourth iteration. This value is five thirty-second parts S _{V-hydraulisch} /5/32 of the entire section S _V of the stroke. Thereafter, the process is repeated with respect to execution of the blocking period and temperature measurement for flow registration. At the first registration, no significant change in temperature is measured. As in the third iteration, the control device 1, due to the negative registration of the flow rate by means of temperature measurement, makes a second registration again for verification. To do this, the control device 1 temporarily opens the flow control valve 2 to the hydraulic opening position where flow is ensured, waits out the blocking period again, and then records the flow. Once the change in temperature in consumer circuit 3 has been detected and this has been verified in the second flow recording, it is assumed that there is no external negative influence. For the fifth iteration, a negative result n is determined.

The optional sixth and seventh iterations presented are carried out according to the actions in the previous iterations.

In one embodiment of the invention, the adjusting device 1, within each iteration that results in a positive result p, registers the flow rate three times. Between temperature measurements, the flow control valve 2 preferably closes during the lockout period, after which it is again adjusted to the appropriate iteration opening position, and the lockout period is waited again. In each iteration that results in a negative result of n, a six-fold flow record is performed, since every record that does not measure a significant change in temperature is recorded to verify the flow at the higher hydraulic opening position.

The lockout period, which is a predetermined number of minutes, allows better recognition of the temperature gradient and reduces the effects on temperature measurements due to the inertia of the heat capacities of the fluid-conducting components in the tempering system 10.

In addition, the determination can be interrupted each time by deactivating or switching off the control device 1 between two tempering requests. In this case, the adjusting device 1, after the next activation or switching on and after the expiration of the blocking time with the next missed registration, continues the iteration in which the determination was interrupted.

Fig. 4 shows the branching of the percentage value with respect to the resolution of measurement errors. The values are based on a symmetrical division of ranges of values, which are made close to each other in order to delimit the desired value. In this case, positive and negative measurements are denoted as 1 and 0, and iterations not yet carried out are denoted as X. It can be seen from the diagram that in this application of determining the threshold value of the hydraulic position of the minimum opening, after five iterations, a resolution of 3.125% is achieved in relation to the entire area S _V . This accuracy is sufficient for the regulating action of the adjusting device 1. In addition, costs can be limited, respectively, the duration of the determination. It must only be ensured that at the end of the determination a positive p result is obtained with respect to leakage. Otherwise, the adjustment device 1 returns, for example, to the previous iteration, or conducts an additional last iteration.

The adjusting device 1 in one version, based on such parameters as the recorded temperature difference ΔT _Ist , the nature of the process itself or the duration of previous activations, can decide whether the actual request for tempering is a smaller or larger share for adding the actual temperature as the nominal temperature . This decision is particularly important when there is a high demand for tempering and in the opening position of the interrupted iteration no flow through the flow control valve 2 has been registered before. Accordingly, the adjusting device 1 may decide that the continuation of the determination, which is newly started in a substantially closed position, is temporarily delayed until a tempering request, or is assigned to every second tempering request. In this way, the determination of the hydraulic threshold value is advantageously shifted by the time interval of the control action in which only the temperature state is maintained.

With a relatively short timing by the thermostat 12, for example only 10 or 15 minutes or less between activations and deactivations of the control device 1, the flow recording in the ongoing determination can be interrupted again, without executing a blocking period between the regulation of the opening position and the ongoing temperature measurement on the circuit 3 consumers. Therefore, the registration result, as the case may be, cannot be used and must be discarded. In addition, with such short timings, the deactivation of the control device 1 is also, that is, the time interval between registrations, due to circumstances, is not long enough, thus the temperature of the coolant in the consumer circuit 3 as a result of heat exchange can no longer be recognized due to the temperature of the arrival of a potentially new part of the coolant . In this case, the control device 1 in one embodiment can decide, on the basis of the blocking periods and activation durations carried out, that the flow control valve 2 remains temporarily closed for the next tempering request. Thus, even during a relatively short timing, it is ensured that the temperature of the heat carrier in the closed consumer circuit 3 has already changed perceptibly as a result of the heat exchange before continuing the determination, and a new inflowing portion of the heat carrier would be detected by a significant temperature change.

In addition, in one embodiment of the control device 1, it is provided that after each request for tempering, only the interrupted or next unaccounted for iteration is carried out, including a predetermined number of flow registrations, and after that the control action of the control device 1 begins for self-adjusting adjustment of the flow control valve 2 in the benefit of tempering by means of the tempering system 10 . In one additional embodiment of the control device 1, it is provided that after each request for tempering, only an additional flow registration from the interrupted or next unaccounted for iteration is carried out before the normal control action starts again. The total duration of the determination, during which time-separated iterations and their registrations are carried out, thus depends mainly on the durations of tempering requests and those intervals between them, that is, the durations of activation and durations of deactivation, respectively, in the case of thermostat 12, on its clocking.

The adjustment device 1 in one embodiment starts or repeats the determination of the hydraulic threshold value when it has been removed from the flow control valve 2 and has been disconnected from the power supply. This initial state occurs when the adjusting device 1 is mounted for the first time, or has been temporarily removed from the flow control valve 2, and has been deliberately separated from the current, respectively, returned to its place. The adjusting device 1 in this embodiment can fix the dismantling of the actuating element 6, which in the assembled state comes into contact with the prestressed valve stem 23, or becomes immobile in the dismantled state.

In addition, in one embodiment of the adjusting device 1, the determination of the hydraulic threshold value can be manually restarted by the user or the installer. For this, predetermined signals can be manually applied, for example in the form of timed Morse signals, to switch on and off, respectively, to activate and deactivate the control device 1.

The adjustment device 1 in an additional embodiment repeats the determination of the hydraulic threshold value cyclically with respect to the repetition interval. For example, the repetition interval is for a predetermined number of several hundred or several thousand tempering requests, or adjustment cycles of the flow control valve 2, after which the valve seal is expected to change. The repetition interval can also be adjusted to a predetermined number of several hundred or several thousand hours of operation of the adjusting device 1.

Further, in figures 5-7 reference is made to a suitable embodiment of these techniques, which is the subject of the following claims.

The adjusting device 1 is mounted on the flow control valve 2. The adjusting device 1 is attached to the flow control valve 2 by means of a flange 27. The flow control valve 2, for its part, in the embodiment shown here, is integrated in the return flow distributor 14 . The return distributor 14 has a connecting pipe 18 screwed into it, which connects the return distributor 14 to the consumer circuit 3 not shown in more detail. The flow control valve 2 can also be integrated into the return flow distributor 14 in a different way. The connection pipe 18 can be pressed into the return flow distributor 14, glued, soldered, welded or otherwise secured.

The adjusting device 1 includes an electrically adjustable actuating element 6. In this example, the longitudinal axes of the adjusting device 1 and the actuating element 6 coincide. The electrically adjustable actuator 6 contains an axially movable drive device (actuator) 20. The longitudinal axis of the drive device 20 also coincides with the longitudinal axis of the electrically adjustable actuator 6. The drive device 20 is located inside the electrically adjustable actuator 6, has a variable length in in the axial direction, a part, for example, an elastic element 21, in particular, a cartridge with wax, and prestressed by a concentrically placed spiral spring 22 coaxial with it. most likely it is often not taken into account for reasons of cost and because of the possible noise during operation. Instead of the helical spring 22, another suitable means, such as an annular spring pack or the like, can also be used to create a prestress.

The electrically adjustable actuator 6 receives signals via electric wires from a temperature recorder 7, not shown in more detail, or a temperature sensor, on the return distributor 14 in relation to the return temperature T _Rücklauf of the flowing heating medium on the downstream side. The electrically adjustable actuator 6 also receives temperature signals via wires from a temperature recorder 7 or a temperature sensor from an incoming flow distributor 13, not shown here, with respect to the incoming flow temperature T _Vorlauf of the flowing heat carrier on the inlet side. An additional electrical wire in this embodiment forms an interface 9 with a thermostat 12, not shown in FIG. 5, but shown in FIG. 6.

The signals received via the wires are processed in the calculator 8 contained in the adjusting device 1 and are issued to the electrically adjustable actuator 6 as appropriate commands or control signals, by means of which the drive device 20 is activated or deactivated. In this way, a certain movement or stroke is ultimately carried out drive device 20 in the axial direction. In this case, the drive device 20 presses in the axial direction on the drive stem or valve stem 23 in the flow control valve 2 and thereby drives it. In this embodiment, the longitudinal axes of the drive device 20 and the drive stem, respectively, of the valve stem 23 in the flow control valve 2 coincide.

As a result of the axial actuation of the valve stem 23, in an exemplary embodiment, the valve head formed in the form of a valve disc 24 rises from the valve seat 25, and thereby determines the position of the valve, which corresponds to a certain opening position of the flow control valve 2, respectively, to a certain flow area open valve.

This stroke of the flow control valve 2, respectively, the open valve flow area formed in this case is recorded by a position finder 15 in the adjusting device 1. The position determiner 15 in this embodiment consists of a magnet 16, which, through a bracket 26 protruding radially outward, is coordinated with an electrically adjustable actuator 6 and is connected to the drive device 20. Thus, the magnet 16 is displaced in the axial direction parallel to the elastic element 21, respectively parallel to the valve disc 24, participating in this same stroke, respectively movement, and serves as a control for this stroke. Placed opposite the magnet 16, the Hall sensor 17 constitutes another integral part of the position finder 15 . By means of the Hall sensor 17, the position is recorded, as well as the displacement or stroke of the magnet 16, and as a result, the stroke of the valve disc 24 relative to the valve seat 25 is recorded, respectively, ultimately determining the cross-section of the flow control valve 2 .

The multiple control device 1 shown in FIG. 5 is integrated into the tempering system 10 explained in FIG. 6 . The exemplary embodiment of the tempering system 10 according to FIG. 6 comprises a switchgear 11 with three adjusting devices 1, which are mounted by means of a corresponding flange 27 on a flow control valve 2 matched to each. Corresponding flow control valves 2 are integrated in the return flow distributor 14 . On the opposite side of the adjusting device 1, or on the lower side of the return distributor 14 in each case, it has a connecting pipe 18 through which a connection is made to the corresponding consumer circuit 3 . In this case, each consumer circuit 3 forms a respective heat exchanger 30. A temperature recorder 7, for example a return flow temperature sensor 7b, is in each case mounted on the connection pipe 18, in particular clamped or glued. The return temperature sensor 7b detects the return temperature T _Rücklauf of the return flow through the corresponding heating medium circuit 3 on the downstream side. The return temperature sensor 7b could also be placed at another suitable location for detecting the corresponding return temperature, for example immediately after the connection 18 on the pipe wall of the consumer circuit 3 depicted by the line.

In addition, the tempering system 10 has an incoming flow distributor 13 . The distributor 13 in the exemplary embodiment has three connecting pipes 28 for the three consumer circuits 3 shown. Again, a temperature recorder 7, for example an inlet temperature sensor 7a, is placed on each connection pipe 28 in order to record the temperature T _{Vorlauf of} the incoming fluid flowing through the respective inlet side heating medium circuit 3 . The inlet temperature sensor 7a could also be placed at another suitable location for detecting the respective inlet temperature, for example immediately after the connection 18 on the pipe wall of the consumer circuit 3 depicted by the line.

The incoming flow distributor 13 is connected to the return flow distributor 14 by a pipeline 29, which contains a tempering source 4 and a pump 5. By means of the pump 5, the heat carrier fluid, which has been loaded or, if necessary, cooled by thermal energy from the tempering source 4, is drawn into circulation. The flowing heating medium advances from the pump 5 to the incoming flow distributor 13, where the heating medium flows into the three consumer circuits 3 depicted here, and through them returns to the return flow distributor 14, the corresponding amount of flow being determined by the flow cross-section of each flow control valve 2 which are built into distributor 14 return flow. From the return distributor 14, the heat transfer medium flowing together there again flows back to the pump 5 or to the tempering source 4 .

One of the thermostat 12 coordinated with the corresponding circuit 3 of the consumer issues a control signal when there is a need for tempering. The control signal is transmitted from the thermostat 12, for example via an interface 9, here a cable, to the control device 1. However, the interface 9 could also be implemented as a wireless connection. This control device 1, by means of this calculator 8, depending on the activation signal or deactivation signal from the respective thermostat 12 and the data for the inlet and return temperatures coordinated with each, respectively, determines the corresponding flow cross-section of the corresponding flow control valve 2 .

Built into the tempering system 10 according to FIG. 6, the adjusting devices 1 according to FIG. 5 are explained again in FIG.

Heat or cold from the consumer circuit is transferred to the environment. The thermostat 12, in particular the room thermostat in the living area of the building, emits a signal. The signal from the thermostat 12 is transmitted to the electronic control unit (ECU) of the adjusting device 1. In addition, the ECU receives a temperature signal, respectively data such as return flow temperature T _Rücklauf and incoming flow temperature T _Vorlauf . The computer 8, which contains the ECU, is designed to electrically control the actuating element 6 of the adjusting device 1, which is not shown in more detail here, in order to move the valve, respectively, to adjust the predetermined opening position of the flow control valve 2, coordinated with a certain flow cross-section.

The flow cross-section of the flow control valve 2, respectively, its stroke is calculated on the basis of the regulation difference ΔT _{Regeldifferenz} , whereby the calculated difference ΔT _{Regeldifferenz} between the temperature difference ΔT _Ist from the recorded temperature T _Vorlauf of the incoming flow on the inlet side and the temperature T _Rücklauf of the return flow on the outlet side, and a predetermined temperature difference (difference) ΔT _Soll is obtained from the ratio of the return flow temperature T _Rücklauf to the incoming flow temperature T _Vorlauf on the inlet side.

In addition, the control device 1 includes not shown additionally here a time recording device and a memory device, which are designed to record and store the duration of the previous or current activation of the activation signal from the thermostat 12, and/or the duration of the deactivation between two activations or deactivations, and the counting and decisive the device 8 with the contained ECU is designed to determine in an alternating mode a predetermined temperature difference ΔT _Soll based on the duration of the activation and/or the duration of the deactivation.

Alternative Aspects for Carrying Out Said Appropriate Technique

Further aspects and alternatives of the control device 1, the method or the corresponding tempering system 10 and their structural components are indicated below.

The thermostat 12 of the tempering system 10, which is placed in the room, may have an input data carrier for entering a value that is typical of the set room temperature, and an interface 9 for issuing an activation signal for at least one consumer circuit 3 in the room.

The thermostat 12 of the tempering system 10 may be designed to operate at the actual room temperature by having the thermostat 12 output an activation signal until the tolerance between the set room temperature and the actual room temperature is exceeded.

Activation according to the definition of the present invention is the state of switching on or actuating from the standby mode (Standby) of the adjusting device 1 or at least the calculator 8 in the adjusting device 1, which is maintained by a continuous signal level, and is triggered by a signal pulse, or from applied in the form of a turn-off voltage signal, respectively, a control voltage, to turn on the transistor to supply power directly supplied in the form of a power signal from the power supply, or the like. The duration of the activation, as defined, means the duration from the beginning to the end of the respective activation into the on state, or activation from standby mode, respectively, the duration of receiving a continuous signal level, trigger voltage, control voltage, or power supply, or the duration of the period between two signal pulses, that affect the on and off process. Deactivation and duration of deactivation, respectively, are the complementary state and duration in which or, respectively, in which the control device 1 does not operate, or at least no calculation is performed in the computer 8 or the actuator 6 is not activated.

The control device 1 can be designed to issue an electrical operation command calculated by the computer 8 to the actuating element 6 during the activation period, and not to issue an electrical operation command or a predetermined electrical operation command corresponding to the closed position during the deactivation period. flow control valve 2 to the actuating element 6. Depending on the type of actuating element 6, the consumer circuit 3 is thus closed after the heating process, so that excessive energy input or excessive temperature control values are prevented.

The control device 1 can be designed to switch off the electric power supply to the computer 8 and/or to the control device 1 during the deactivation period. electricity.

The calculator 8 can be configured to store at least one value of the previous opening position of the flow control valve 2 in a memory device. In this way, when the control device 1 is activated, the position of the valve as a starting point, which has already been determined during the previous heating times, is first checked, and during the current heating times only deviation adjustment is used.

The storage device may contain a previously stored control value for the duration of the activation and/or a previously stored control value for the duration of the deactivation. In this way, the heating time adjusted as comfort to reach the set temperature is stored as the desired control value, against which the self-regulation is directed.

The storage device may contain a previously stored range of values for the temperature difference. In this way, it can be ensured in a simple way that the operating mode of the heat exchanger 30 is selected within an energy-saving range.

The storage device may contain a previously stored parametric surface with agreed activation duration and/or deactivation duration, and predetermined temperature differences to determine the temperature difference. Thereby, a predetermined universal control can be converted with little processing power.

The memory device may contain previously stored control logic for calculating the temperature difference. In this way, individualized control can be achieved.

The adjusting device 1 may be designed to change the temperature difference depending on the temperature of the incoming stream, and/or the adjusting device 1 can be designed to change the range of the temperature difference depending on the temperature of the incoming stream, and/or the adjusting device 1 can be oriented to receive through the interface 9 additional external signals with operating parameters from the tempering system 10; and the calculator 8 can be designed to adapt the temperature difference depending on the operating parameters. In this way, a control can be provided which, by varying the temperature of the incoming flow, detects fluctuations in weather conditions or seasons, and accordingly adapts the effective operating mode or other comfort-oriented functions that can be set on the multifunctional room thermostat to which the control is associated.

In one room of the building, a thermostat 12 and two or more consumer circuits 3, respectively, heating or cooling circuits, can be placed. In this way, it is possible to supply large rooms with numerous installed heating or cooling hoses with standard diameters, and in total with lower flow resistance, which are controlled by their own control devices 1, however, by the same room thermostat.

The thermostat 12 may have a bimetal element that responds to the actual room temperature and issues an activation signal or a deactivation signal. This results in a particularly simple, reliable and cost-effective design of the room thermostat without electronics and sensors.

The activation signal or deactivation signal may be a binary signal that provides for an on state with a signal level above a predetermined level, and an off state with no signal level or with a signal level below a predetermined level. In this way, a particularly simple and economical execution of signal generation and signal recognition is also achieved.

The thermostat 12 may include a microcomputer and a temperature sensor 7a, 7b for recording the actual room temperature; moreover, the thermostat 12 registers and stores the course of change of the actual room temperature during and/or after the issuance of an activation signal or a deactivation signal; and the thermostat 12 and the adjusting device 1 are designed to communicate the progress of the actual room temperature. Thus, a multi-functional design of the tempering system 10 is realized, which allows adaptive control with additional comfort-oriented parameters, such as the influence of the heating curve characteristic depending on the initial and target temperature and/or the outside temperature, or clock readings or the like.

An activation signal or a deactivation signal can be transmitted via wireless interfaces 9 from a specific thermostat 12 to a matching control device 1. In this way, a cable connection from the room thermostat to the control device 1 can be dispensed with and installation costs can be reduced. In addition, such a wireless interface 9 also provides a connection between a smartphone, a tablet personal computer (PC) or the like, and an adjustment device 1 or a thermostat 12, thereby creating an additional possibility for user input into the system.

A smaller temperature difference can be detected when the duration of at least one previous activation is longer than the control value, or an increased temperature difference when the duration of at least one previous activation is less than the control value. Thus, self-regulation is guided by the previously identified as a comfortable duration to achieve the set value.

The temperature difference can be determined on the basis of the course of successive predetermined activation times. This enables the self-adjustment to be better adapted to user actions, seasons, or the like.

The adjusting device 1 can have a position detector 15 which is designed to register the actual position of the actuating element 6. This makes it possible, depending on the type of the actuating element 6, to maintain the required state of the desired stroke.

The position determiner 15 can be formed from a magnet 16 and a Hall sensor 17 matched with the magnet 16 . This makes it possible to accurately register and execute a predetermined stroke.

The actuating element 6 can be made by various types of actuators, the control force of which is based on the power of the electromotive drive, thermal expansion, spring preload or the like, as far as the working stroke can be adjusted due to actuation from the calculator 8.

In the figures 5-7 discussed above, the following jointly listed reference numbers have been used, and this listing does not claim to be complete:

1 adjustment device;

2 flow control valve;

3 consumer circuit;

4 source of tempering;

5 pump;

6 executive element;

7 temperature recorder;

7a inlet temperature sensor;

7b return temperature sensor;

8 calculating device;

9 interface;

10 tempering system;

11 switchgear;

12 thermostat;

13 distributor of the incoming flow;

14 return flow distributor;

15 position finder;

16 magnet;

17 Hall sensor;

18 connecting pipe;

20 drive device (executive means);

21 elastic element;

22 coil spring;

23 valve stem;

24 valve disc;

25 valve seat;

26 bracket;

27 flange;

28 connecting pipe;

29 pipeline;

30 heat exchanger;

S _V common movable section of the stroke;

S _V-min closed position of the flow control valve;

S _{V-hydraulisch-min} hydraulic minimum opening position of the flow control valve;

S _{V-hydraulisch} hydraulically limited opening position of the flow control valve;

T _Vorlauf temperature of the incoming flow of the flowing coolant on the inlet side;

T _Rücklauf return temperature of the flowing heating medium on the downstream side;

ΔT _Ist temperature difference;

ΔT _Soll temperature difference (differential);

ΔT _{Regeldifferenz} mismatch;

T _Raum-Soll set room temperature;

T _Raum-Ist actual room temperature

Claims (70)

1. Adjusting device (1) for self-adjusting adjustment of the valve (2) for regulating the flow of the circuit (3) of the consumer with the heat exchanger (30), in particular, in the tempering system (10) for a building with a tempering source (4), a heat carrier and a pump ( 5), and the adjusting device (1) has: an actuating element (6) which, in connection with the flow control valve (2), is designed so that the opening position of the flow control valve (2) can be adjustable and registerable between the closed position (S _V-min ) and the open position, in particular, gradually or stepwise, by means of an adjusting device (1); a temperature recorder (7) which registers the temperature (T _Vorlauf ) of the incoming flow present on the inlet side with respect to the consumer circuit (3) and the temperature present on the outlet side (T _Rücklauf ) of the return flow of the flowing heat carrier; and calculator (8), which is designed to calculate the operation of the actuating element (6), which corresponds to a predetermined - in accordance with one specific flow cross section - the opening position of the flow control valve (2) in such a way that the temperature difference (ΔT _Ist ) from the recorded temperature (T _Vorlauf ) of the inlet flow and the temperature (T _Rücklauf ) of the return flow on the outlet side is reduced to a predetermined temperature difference (ΔT _Soll ) between the temperature (T _Rücklauf ) of the return flow on the outlet side and the temperature (T _Vorlauf ) incoming flow on the input side; different in that the adjusting device (1) is designed to determine the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening of the flow control valve (2) at which the flow can be recorded along the working stroke; and the control device (1) registers the flow through the flow control valve (2) based on the change in the temperature of the coolant in the consumer circuit (3); and determining the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening includes iterating various opening positions along the stroke of the flow control valve (2); each iteration of the opening position of the flow control valve (2) includes at least one flow registration through the flow control valve (2); and determination of the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is extended to a plurality of external tempering requests of the consumer circuit (3), and the missed determination iterations, which have not yet been made after the deactivation of the adjusting device (1) between tempering requests, continue with a new activation of the adjusting device (1). 2. Adjusting device (1) for self-adjusting adjustment of the valve (2) for regulating the flow of the circuit (3) of the consumer with the heat exchanger (30), in particular, in the system (10) of the tempering for the building with the source (4) of tempering, the heat carrier and the pump ( 5), and the adjusting device (1) has: an electrically adjustable actuator (6) which, in connection with the flow control valve (2), is designed so that the opening position of the flow control valve (2) can be adjustable and registerable between the closed position (S _V-min ) and the open position, in in particular, gradually or stepwise, by means of an adjusting device (1); a temperature recorder (7) which registers the temperature (T _Vorlauf ) of the incoming flow present on the inlet side with respect to the consumer circuit (3) and the temperature present on the outlet side (T _Rücklauf ) of the return flow of the flowing heat carrier; a calculating device (8), which is designed to calculate the electrical actuation of the actuating element (6), which corresponds to a predetermined opening position of the flow control valve (2), coordinated with a certain flow cross section, based on the mismatch (ΔT _{Regeldifferenz} ) regulation, wherein the mismatch (ΔT _{Regeldifferenz} ) occurs between the temperature difference (ΔT _Ist ) from the recorded temperature (T _Vorlauf ) of the incoming flow on the inlet side and the temperature (T _Rücklauf ) of the return flow on the outlet side and a predetermined temperature difference (ΔT _Soll ) between the temperature (T _Rücklauf ) return flow on the outlet side and temperature (T _Vorlauf ) of the incoming flow on the inlet side; interface (9) for receiving an external activation signal for activating the computing device (8) and/or the adjusting device (1); and the adjustment device (1) includes a time recording device and a memory device, which are designed to register and store the duration of the previous or current activation of the activation signal and/or the duration of the deactivation between two activations; and the calculating device (8) is intended for variable determination of the temperature difference (ΔT _Soll ) based on the duration of activation and/or the duration of deactivation; different in that the adjusting device (1) is designed to determine the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening of the flow control valve (2) at which the flow can be recorded along the working stroke; and the control device (1) registers the flow through the flow control valve (2) based on the change in the temperature of the coolant in the consumer circuit (3); and determination of the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening includes iteration of various opening positions along the stroke of the flow control valve (2); each iteration of the opening position of the flow control valve (2) includes at least one flow registration through the flow control valve (2); and determination of the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is extended to a plurality of external tempering requests of the consumer circuit (3), and the missed determination iterations, which have not yet been made after the deactivation of the adjusting device (1) between tempering requests, continue with a new activation of the adjusting device (1). 3. Adjusting device (1) according to claim 1 or 2, and the first iteration starts at the hydraulic opening position (S _{V-hydraulisch} ) at which flow through the flow control valve (2) is to be expected; and the adjusting device (1) adjusts the opening position of the flow control valve (2) for subsequent iteration with an offset towards the closed position (S _V-min ) of the flow control valve (2) when flow through the flow control valve (2) is detected. 4. Adjusting device (1) according to claim 3, wherein the adjusting device (1) adjusts the opening position of the flow control valve (2) for subsequent iteration with an offset against the direction towards the closed position (S _V-min ) of the flow control valve (2), when the flow rate through the flow control valve (2) is not registered. 5. Adjusting device (1) according to one of claims 1 to 4, wherein the adjusting device (1) shifts the opening position of the flow control valve (2) during the subsequent iteration by a section on the power stroke, which corresponds to half the value of the shifted section during the previous iteration. 6. Adjusting device (1) according to one of claims 1 to 5, wherein the adjusting device (1) determines the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening within a predetermined number of iterations of the various opening positions of the flow control valve (2) . 7. Control device (1) according to one of claims 1 to 6, wherein when flow through the flow control valve (2) is not registered, the iteration of the corresponding opening position includes another flow registration at a higher opening position of the valve (2) flow control. 8. Adjusting device (1) according to one of claims 1 to 7, each iteration including a predetermined number of flow registrations through the flow control valve (2) to the opening position of the flow control valve (2). 9. Adjusting device (1) according to one of claims 1 to 8, wherein between each iteration of the opening position, between each registration of flow within one iteration of the position and/or between activation and continuation of the iteration of the determination not made, a predetermined blocking period is first carried out, for which the flow control valve closes and/or no temperature is recorded. 10. Adjusting device (1) according to one of claims 1 to 9, wherein the continuation of the interrupted iteration of determining the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is temporarily interrupted for a tempering request, when the opening position of the interrupted iteration was not previously registered flow through the flow control valve (2). 11. Adjusting device (1) according to one of claims 1 to 10, wherein the adjusting device (1) determines the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening when it was separated from the current supply when a dismantling was registered in in relation to the flow control valve (2) by means of the actuating element (6), and/or when a preset switching pattern has been registered in relation to activation. 12. Adjusting device (1) according to one of claims 1 to 11, wherein the adjusting device (1) determines the minimum opening hydraulic position (S _{V-hydraulisch-min} ) when a predetermined repetition interval expires. 13. Method for self-adjusting adjustment of the liquid heat carrier flow through the consumer circuit (3) with a heat exchanger (30) in the tempering system (10) for a building with a tempering source (4) and a pump (5) by means of an adjusting device (1) for the control valve (2) expense; wherein the method has at least the following steps: registering the temperature present on the inlet side (T _Vorlauf ) of the incoming flow and the temperature present on the outlet side (T _Rücklauf ) of the return flow of the flowing coolant in the consumer circuit (3); setting - matched to a specific flow cross-section - the opening position of the valve (2) for regulating the flow in such a way that the temperature difference (ΔT _Ist ) from the recorded temperature (T _Vorlauf ) of the incoming flow on the inlet side and the temperature (T _Rücklauf ) of the return flow on the outlet side is reduced to a predetermined temperature difference (ΔT _Soll ) between the temperature (T _Rücklauf ) of the return flow on the outlet side and the temperature (T _Vorlauf ) of the incoming flow on the inlet side; different steps: determining the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening of the flow control valve (2) at which the minimum flow rate can be registered along the stroke; through registering the flow through the flow control valve (2) based on changes in the temperature of the coolant in the consumer circuit (3); and determining the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening includes iterating various opening positions along the stroke of the flow control valve (2); each iteration of the opening position of the flow control valve (2) includes at least one flow registration through the flow control valve (2); and determination of the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is extended to a plurality of external tempering requests of the consumer circuit (3), and the missed determination iterations, which have not yet been made after the deactivation of the adjusting device (1) between tempering requests, continue with a new activation of the adjusting device (1). 14. Method for self-adjusting adjustment of the liquid heat carrier flow through an externally activated consumer circuit (3) with a heat exchanger (30) in the tempering system (10) for a building with a tempering source (4) and a pump (5) by means of an adjusting device (1) for the valve (2 ) flow control; wherein the method has at least the following steps: registering the duration of the previous or current activation and/or the duration of the deactivation of the circuit (3) of the consumer; registering the temperature present on the inlet side (T _Vorlauf ) of the incoming flow and the temperature present on the outlet side (T _Rücklauf ) of the return flow of the flowing coolant in the consumer circuit (3); determining a variable temperature difference (ΔT _Soll ) between the outlet side return temperature (T _Rücklauf ) and the inlet side temperature (T _Vorlauf ) based on the duration of the activation and/or the duration of the deactivation; calculation of the mismatch (ΔT _{Regeldifferenz} ) between the temperature difference (ΔT _Ist ) from the recorded temperature available on the inlet side (T _Vorlauf ) of the incoming flow and the temperature present on the outlet side (T _Rücklauf ) of the return flow, as well as a predetermined temperature difference (ΔT _Soll ); and calculation and adjustment of the adjustable flow cross-section in the circuit (3) of the consumer based on the specified mismatch (ΔT _{Regeldifferenz} ); moreover, adjust - consistent with a certain flow cross-section - the opening position of the valve (2) for regulating the flow in the circuit (3) of the consumer; different steps: determining the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening of the flow control valve (2) at which the minimum flow rate can be registered along the stroke; through registering the flow through the flow control valve (2) based on changes in the temperature of the coolant in the consumer circuit (3); and determining the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening of the flow control valve (2) includes iterating various opening positions along the stroke of the flow control valve (2); each iteration of the opening position of the flow control valve (2) includes at least one flow registration through the flow control valve (2); and determination of the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is extended to a plurality of external tempering requests of the consumer circuit (3), and the missed determination iterations, which have not yet been made after the deactivation of the adjusting device (1) between tempering requests, continue with a new activation of the adjusting device (1). 15. The method according to claim 13 or 14, and the first iteration starts at the hydraulic opening position (S _{V-hydraulisch} ) at which flow through the flow control valve (2) is to be expected; and the opening position of the flow control valve (2) for the next iteration is shifted towards the closed position (S _V-min ) of the flow control valve (2) when flow through the flow control valve (2) is detected. 16. The method according to claim 15, wherein the opening position of the flow control valve (2) for the next iteration is displaced against the direction towards the closed position (S _V-min ) of the flow control valve (2) when the flow rate through the flow control valve (2) is not registered. 17. A method according to one of claims 13 to 16, wherein the opening position of the flow control valve (2) in the subsequent iteration is displaced by a portion of the power stroke that corresponds to half the displaced portion in the previous iteration. 18. A method according to one of claims 13 to 17, wherein the hydraulic opening position (S _{V-hydraulisch} ) is determined within a predetermined number of iterations of the various opening positions of the flow control valve (2). 19. A method according to one of claims 13 to 18, wherein when no flow is detected through the flow control valve (2), iteration of the corresponding opening position includes another flow registration at a higher flow control valve (2) opening position. 20. The method according to one of claims 13 to 19, wherein each iteration includes a predetermined number of flow registrations through the flow control valve (2) per opening position of the flow control valve (2). 21. The method according to one of claims 13 to 20, wherein between each iteration of the opening position, between each detection of a leak within one iteration of the opening position, and/or between activation and continuation of the determination iterations not made, a predetermined blocking period is first carried out, for which the valve (2) the flow controls are closed and/or do not record the temperature. 22. The method according to one of claims 13-21, wherein the continuation of the interrupted iteration of determining the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is temporarily interrupted to request tempering, when no flow through the valve was previously recorded in the opening position of the interrupted iteration ( 2) flow control. 23. The method according to one of claims 13 to 22, wherein the determination of the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is carried out when the adjusting device (1) has been separated from the power supply, when a dismantling has been registered in relation to the valve (2) flow control and/or when a predetermined switching pattern has been registered with respect to activation. 24. The method according to one of claims 13 to 23, wherein the determination of the hydraulic position (S _{V-hydraulisch-min} ) of the minimum opening is carried out when a predetermined repetition interval has elapsed.

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