Heating element valve head, heating control system and method

Abstract

The head (1) of the heating element valve, in addition to the components necessary for creating the movement of the pusher element, also includes a casing (4) with a temperature sensor, where the casing (4) is movably mounted within the head (1), for example on the rear wall of the body (2), while the casing (4) is pressed against the surface of the nut (3) and is made of metal for good heat conduction and ensuring low friction between the nut (3) and the casing (4). The temperature sensor inside the casing (4) is connected by a wire or a cable to the control circuit and / or to a contactless communication element. It is advantageous if the casing (4) is permanently pressed against the nut (3) by means of a spring (5) and / or by means of deformation of the flexible plastic holder in which the casing (4) is mounted, or by means of deformation of the stop of the circumferential collar. The valve temperature data can be used to optimize the course of movement of the pusher element. The superior control center (8) is able to evaluate the dynamics of temperature changes on the valves, which will allow for optimizing flow rates in various branches, for example to compensate for hydraulic imbalance in the system.

Description

Field of technology

[0001] The invention concerns the control of a heating system with a heat transfer medium by means of a remotely controlled head that electromechanically controls the valve of the heating element. The head is capable of sensing the temperature of the valve and thereby the temperature of the heating element, too, and the measured data are sent by the head to a superior control center.Prior state of the art

[0002] The valves of heating elements with a heat transfer medium are controlled manually or by means of thermostatic heads or by means of electronically controlled heads, which can operate autonomously or which can communicate with a superior (higher-level, master) control element. An electronically controlled head usually includes an electric motor, a gear mechanism, a power source, an engine control circuit (usually with a position sensor, too) and preferably also a contactless communication element for connection with a superior control element. Such a device is described, for example, in the documents DE102012011336A1, DE102013110821A1. The head is capable of pressing or releasing a valve pin according to instructions, by which the throttling element in the valve is moved between the two end positions. It is preferable if the head is also capable of measuring the temperature of the surrounding environment, using a sensor located away from the valve within the head body, for example according to documents CN108548002A, CN220452871U or CN103616903A.

[0003] Publication EP3276267B1 describes temperature sensors that are connected to pipes. The installation of cable lines and the correct placement of the sensors requires professional experience and loosely led cables are impractical, prone to damage and are also aesthetically displeasing. The use of such solutions (for example, also EP3282337A1 or US10578318B2) in public areas is unreliable and problematic. If the sensors are to be placed in an inaccessible place, this complicates the quick installation of the head. Solutions with temperature measurement directly in the heat transfer medium line such as in CN201884782U are difficult to install and create a risk of leakage.

[0004] Publication EP3246782A1 describes three temperature sensors located in the head at different distances from the zone of the connection of the head with the valve. Based on the different values from the three sensors, the temperature gradient can be calculated, while the temperature of the valve can be calculated indirectly. This system is complicated and burdened with various measurement errors.

[0005] A simple and long-term reliable design solution for an electronically controlled head with temperature sensing of the heat transfer medium in the valve of the heating element is required and not known, while the solution should be easy to install and should provide sufficiently accurate and quickly reacting measurement results.Essence of the invention

[0006] The above-mentioned deficiencies are significantly remedied by the valve head of the heating element with a body, where the head inside the body includes an electric engine, a gear mechanism, a power source, a control circuit, preferably also a contactless communication element, and where the body has an external connection zone adapted for connection to the valve of the heating element, whereby the connection zone is provided with a rotatably mounted nut (screw female) for connection with the thread of the valve according to this invention, the essence of which lies in the fact that a casing (housing) with a temperature sensor is movably mounted in the body, whereby the casing is pressed against the surface of the nut and the temperature sensor is connected to the control circuit and / or to the contactless communication element. The casing is preferably metallic or at least partially metallic or including at least one metal surface for the contact with the nut. The metal surface of the casing is advantageous not only because of good heat transfer, but also to ensure the sliding contact of the casing and the nut when screwing the nut. If the head also has an ambient temperature measurement, which will be the usual embodiment, it will also have a temperature sensor oriented oppositely against the connection zone, as is known from the prior art. This ambient temperature sensor is not described in detail further.

[0007] An important feature of the present invention is the arrangement where the casing with the temperature sensor is physically pressed onto the surface of the nut. The body of the head is usually made of plastic, which allows for a suitable shape to be created for receiving all the components, to ensure mechanical resistance and at the same time to achieve the desired aesthetic appearance. The nut is almost always metallic, in particular due to sufficient strength with a small thread height, which must correspond to the thread on the metal valve. Plastic nuts have not proven themselves in practice, since the thread could easily be torn down if installed incorrectly. The present invention therefore uses the good thermal conductivity of the metal valve casing and good heat transfer to the nut, which is a common part of the head in a metal version. Usually, the nut is put onto the connection zone of the body in such a way that the connection zone contains elastically (flexibly) deformable stops and after the nut is put on, the front annulus of the nut rests on the surfaces of these stops. The stops are preferably arranged around the circumference and they form a circumferential collar. This allows the nut mounted on the body to rotate essentially freely in the axis of the zone of connection, so that the nut can be screwed onto the valve. At the same time, after tightening the nut, a solid axial connection between the head body and the valve is created.

[0008] Measuring the temperature near the valve body to determine the temperature inside the valve, as is known from the prior art, introduces inaccuracies where the air gap acts as an insulator. The air gap is necessary if the temperature sensor is located in the head body on the valve side. The contact chain "heat transfer medium - valve body - nut - casing with sensor" according to this invention conducts heat well and provides accurate and quick measurement data. The pressure of the casing ensures good heat transfer in contact with the nut.

[0009] A pusher element protrudes from the body through the zone of connection and rests on the valve pin. By pushing the pin, the flow of the heat transfer medium through the valve is regulated. The heat transfer medium is supplied to the valve through a pipe with a relatively small cross-section; when the valve is stopped, the flow in the pipe stops and heat transfer without flow occurs only over a very short distance, which is quickly reflected in the cooling of the valve body. This temperature change is transferred to the nut; the temperature is recorded from the surface of the nut by a temperature sensor in the casing. The head in this document may also be referred to as a valve control element, a controlled actuator, or it may be referred to similarly with the meaning of a device that is connected to the valve and controls the level of its opening and closing.

[0010] The contact of the temperature sensor casing with the surface of the nut can be produced as permanent or as adjustable, when during installation of the head the pressure is limited or completely excluded and then after tightening the nut the pressure mechanism is released again to the position in which the casing with the temperature sensor is pressed against the surface of the nut. A simpler solution has proven to be advantageous, when the pressure of the casing on the surface of the nut is exerted constantly, for example by means of a spring. In such a case, the casing slides over the surface of the nut when screwing it, which does not pose a problem, since screwing the nut is a one-off operation and the friction in contact of the casing with the nut is not high. Permanent pressure of the casing to the nut is also advantageous because there is no risk of accidentally leaving the casing without pressure when installing the head.

[0011] The pressure of the casing to the nut can be arranged in two basic directions. The casing can be radially pressed against the outer or inner circumference of the nut, when the casing is placed, for example, on a pivotable holder in the body of the head. The casing can then lean onto the circumference of the nut, where the nut has recesses that facilitate gripping with fingers or tools. In such a case, the casing also acts against the nut's spontaneous rotation. In another embodiment, the nut can have a smooth cylindrical shape at the edge or a smooth circumferential groove into which the casing leans.

[0012] The compact arrangement and simple placement of the casing allows the sleeve to be moved basically in parallel with the axis of rotation of the nut. Such an arrangement may have various embodiments.

[0013] In one preferable embodiment, a commercially available encapsulated temperature sensor, for example a negative temperature coefficient NTC thermistor, is used, which is indissolubly inserted into a stainless steel metal casing with a cylindrical shape, with the output wires (wiring, conductors, cables) coming out of one side of the casing. The casing has a length more twice the diameter, making such a casing directly suitable for forming a sliding deposition in the body of the head. The connection of the casing, sensor and wires can also be called a temperature probe, and such a probe is usually supplied in a waterproof version.

[0014] A metal casing with a temperature sensor is inserted into a cavity in the body of the head, whereby the cavity has an opening corresponding to the cross-section of the casing on the side adjacent to the nut. On the opposite side, inside the body, the cavity has an opening for passing the wires of the temperature sensor. The wires of the sensor enter the inside of the body, where they are connected to the corresponding PCB. The wires are led with a bend and with a gap, so they do not prevent the casing from being pulled out of the cavity. A spring is inserted in the cavity, which pushes the casing out of the cavity in the direction towards the surface of the nut. The cavity preferably has a cylindrical shape, which corresponds to the cylindrical shape of the casing with a small gap. The axis of the cavity is essentially parallel to the axis of rotation of the nut or the axis of the cavity is led obliquely so that the casing is directed towards the surface of the nut. The spring pushes the casing out of the cavity, but after the nut is put on and the nut fits on the circumferential collar, the casing's outward movement is limited precisely by the nut.

[0015] The spring has a support formed in the cavity, for example, the spring leans onto the bottom of the cavity, which has an opening for passing of the wires, but the opening is smaller than the diameter of the compression cylinder spring. On the opposite side, the spring leans onto the front of the casing, from which the wires emerge. This slidable deposition does not need to have a stop for the extended position formed within the cavity, since the function of the stop is performed by the nut after it is put onto the zone of connection. The metal casing is reliably led in the cavity and the plastic material of the cavity surface ensures low friction when the casing is pushed towards the nut. At the same time, the plastic material of the cavity creates thermal insulation of the casing against the environment and also against the inside of the body of the head. Heat can be generated in the body of the head from the PCB board, from the electric engine, from the gearbox when the engine is operating, and so on.

[0016] In another embodiment, the metal casing is pressed in by means of a lever with a spring. The casing is inserted into a hole inside the lever, with the edge of the casing projected from the lever in the zone for contact with the nut. The lever is made of plastic and thus it thermally insulates the casing against the cooling from the environment. The lever can be pressed into engagement with the nut by means of a spring, or the lever can be made of plastic so that after the insertion of the sleeve and the attachment of the nut, the lever is deformed within the elastic deformation. Depending on the slope of the sleeve in contact with the nut, the nut can have a circumferential contact surface with a corresponding slope.

[0017] In another possible embodiment, the temperature sensor is pressed against the inner surface of the nut, for example in the zone of the stops of the circumferential collar, which define the position of the nut. A cavity is formed in one of the stops for placing the temperature sensor. The sensor in this embodiment has small dimensions, preferably in SMD realization, or as a MEMS sensor, while its conductive connection to the printed circuit board in the body of the head is ensured by wires guided inside the body of the head. The SMD temperature sensor preferably has at least one surface made with a metal coating, for example from platinum, whereby this part of the temperature sensor should be considered as a metal casing.

[0018] In the case of using an SMD mounted temperature sensor, it is advisable to place it on a separate small printed circuit board, which is inserted into the cavity in the circumferential collar stop and the wires from the board are placed in the opening or groove leading to the inside of the body of the head. The fixing of the separate small printed circuit board in the stop is ensured by means of thermally conductive paste or silicone with good thermally conductive properties, in order to ensure minimal distortion of the measured temperature. The function of the spring in such an arrangement is performed by the elastic mounting of the temperature sensor on a separate board and / or the mounting of the board in an elastic bed and / or the springing of the stop, which remains in a slightly pre-stressed state even after the nut is inserted onto the peripheral collar. A slight deformation of the stop formed as a segment of the peripheral collar can maintain the necessary pressure of the temperature sensor on the inner surface of the nut, while the elastic deformation of the corresponding part of the peripheral collar also serves in the phase of placing the nut on the peripheral collar. The location of the temperature sensor in contact with the inner surface of the nut reduces the influence of heat loss on the accuracy of the measured temperature, as the nut is cooled by the ambient temperature on the outside.

[0019] In addition to the slidable deposition, the placement on the lever and the conduct in the stop of the circumferential collar, it is also possible to make other versions of the casing arrangement in order to achieve contact between the casing and the nut according to the first claim.

[0020] The nut is directly connected to the body of the valve, but its surface is cooled by the surrounding environment, which creates a temperature difference between the measured temperature and the temperature of the heat transfer medium. The temperature gradient depends on the ambient temperature, which is usually also measured by the head or by a separate sensor. Depending on the measured ambient temperature and the temperature at the temperature sensor in the casing, a correction can be made using calibration curves.

[0021] In one of the preferable embodiments, the nut is provided with thermal insulation, at least on a part of the outer surface outside of contact with the casing, which may take the form of a plastic coating, an insulating cover of the nut, and so on. By insulating the nut and maintaining good heat transfer from the nut to the casing, the difference between the temperature measured in the casing and the actual temperature of the heat transfer medium is reduced.

[0022] The function of thermal insulation of the nut can also be fulfilled by a protective element against unauthorized manipulation with the nut. If the heads are installed in public areas, there is a risk of their theft, which can be prevented by a protective element in such a way that, after installation, the rotation of the nut is blocked by means of a protective element. The protective element can be in the form of a hoop that is pushed onto the surface of the nut after the nut is tightened to the valve.

[0023] The deficiencies in the prior art are also significantly remedied by a heating control system, which includes at least two heating elements with a heat transfer medium, which have valves for controlling the flow of the heat transfer medium, where heads are connected to the valves according to the description above, whereby the system includes a superior control center which is connected to the heads and where the superior control center has an evaluation unit for processing data concerning the temperature of the valves. Preferably, the heads are connected to the superior control center wirelessly, which significantly increases the flexibility of the system and simplifies installation even with a large number of heads. However, in principle, the technical features and algorithm steps described here can also be used with heads connected by conventional wires.

[0024] The deficiencies in the prior art are also significantly remedied by a method of heating control, where the heating system includes at least two heating elements with a heat transfer medium with valves and heads according to the previous description, whereby the temperature of the nut by which the head is screwed to the valve is sensed; the data concerning the temperature of the nut are sent to the superior control center and assigned to the corresponding position of the pusher element in the head.

[0025] The method according to this invention may also include the step of adjusting the course of the pusher, whereby the engine is rotated, the position of the pusher is recorded, and the temperature measured on the nut is assigned to the position of the pusher element. By repeating these steps, a file is created that expresses the dependence of temperature on the position of the pusher element.

[0026] The proposed invention enables precise determination of the position of the pusher element at which the heat transfer medium begins to flow into the heating element. The algorithm for tracking the optimal valve opening point is based on iterative measurement of the position of the pusher element relative to the temperature measured on the nut. The algorithm can be used, for example, in a state where the temperature measured on the nut corresponds to the statistically measured temperature corresponding to the cooled heating element of the system and the difference between the set room temperature and the room temperature measured by the control unit (regulation unit) is not greater than, for example, 3°C, preferably not greater than 1°C. In the case of a larger temperature difference, the algorithm is not initiated in order to not to delay the start of heating of the space.

[0027] The algorithm is based on the gradual movement of the pusher element, which leads to the opening of the valve in small steps, and after each change of the step, the head waits for a set time for the newly set position to ensure the possibility of heating the nut by the heat transfer medium that has started to flow into the heating element. The waiting time can be set according to the type of valve and the flow rate in the heating system. In a state where the temperature measured on the nut increases by a defined value, the head records the current position of the pusher element, and this position corresponds to the real beginning of the valve opening. The position corrected by the margin of error or corrected by the valve hysteresis - when the point of the beginning of the flow through the valve is slightly moved from the point of end of the flow during the closing of the valve - is sent to the superior control center.

[0028] To prevent the extreme position of the pusher element from changing immediately with every regulation change and to prevent the system from reacting to eventual anomalies in the heating system, changes to the setting of the extreme position are made only after several recorded position values fall within the set interval. Based on such measurements, the head and / or the superior control center can directly correct the valve opening point, or notify the user of the need for correction via status notifications.

[0029] The above-described algorithm or another algorithm can be deactivated or activated by a superior control center even at a higher difference between the set and actual room temperature, in order to set the optimal valve opening points, e.g. after installation of the system. The algorithm can include a step where, after measuring the temperature increase on the nut, the valve does not continue to open and the heating element is not controlled to reach the desired temperature, but the valve is closed and after the time required for the heating element to cool down, another measurement iteration occurs in one or more stages.

[0030] The correct setting of the valve opening point can also be checked during the operation of the heating system, when the valves are closed when the heated space reaches the attenuation (lower) temperature. In this case, it is evaluated whether, after the specified time interval required for the heating element to cool down, the temperature measured on the nut of the head has decreased to the value corresponding to the state without heating medium flow. If the temperature measured on the nut of the head does not decrease to the temperature corresponding to the cooled heating element, the algorithm proceeds in the opposite way to what was already mentioned, i.e. the valve is gradually closed. After each change in the position of the pusher element, the head remains in the newly set position for a specified time interval, during which the decrease in the temperature measured on the nut is monitored. If, after the specified time interval, the temperature of the nut does not decrease, further measurement iterations follow.

[0031] If the temperature measured on the nut does not start to decrease even when the pusher element reaches its extreme position, when the maximum closing position limited by the construction features of the head is reached, the head will send information about the given condition to the superior control center, which will then notify the system administrator and ask him to mechanically check the head and the valve.

[0032] An important feature of the invention is therefore the integration of a temperature sensor into the body of the head so that the sensor measures the temperature of the valve. The integration simplifies the installation of the head and achieves a compact construction compared to solutions where it was necessary to separately attach the temperature sensor and lead its wires into the head.

[0033] The method according to this invention allows not only to evaluate the temperature of the valve and the temperature in the room with the corresponding heating element, but also to achieve at least partial hydraulic balancing of the heating system. Hydraulic balancing of the heating system is usually carried out manually, when qualified personnel tries to achieve a uniform flow rate in all parts of the heat transfer medium distribution, whereby the personnel adjusts, for example, throttle valves at the outlet of the heating elements. Such operations are time-consuming and personnel-intensive.

[0034] The head according to this invention, in connection with a superior control center, provides data concerning the dynamic onset of heating, which indicates the flow rates to the heating elements at given hydraulic conditions. The superior control center within the system can, using the collected data, issue an instruction to the head or several heads where the valve temperature increases most rapidly, in order to limit the flow rate of the heat transfer medium. By throttling some valve at an unchanged speed of the circulation pump, the desired increase in the inflow occurs at the other valves. At the same time, the system records the data for the relevant valves and subsequently limits the active course of the pusher element in the next control. The relevant valve is then operated not in the entire range of movement, but in one that takes into account the hydraulically balanced flow rate through several or even all branches of the heating system. This procedure is particularly advantageous in systems without functional hydraulic regulation, and also where the performance of the heating elements is not well dimensioned in some rooms. In such cases, it often happens that in certain phases of the heating regimes, especially during morning onsets after the night-time heating reduction and also at the end of weekends (e.g. in office buildings), some rooms or even entire parts of the buildings heat up too quickly, while other parts of the buildings are thermally under-dimensioned. This ultimately reduces the thermal comfort of all users, or even violates the required hygiene standards which the building administrator is obliged to ensure. The previous solution consisted of starting the heating earlier, so that even the under-dimensioned rooms were heated at the monitored time, which, however, leads to a waste of energy.

[0035] The method of hydraulic balancing of a heating system using heads according to this invention consists in monitoring the temperature conditions of individual rooms of the building in the time period when the required temperature changes from the attenuation (lower) to the comfort (higher), while the main monitored factor is the dynamics of the temperature increase in the room measured by the spatial control unit. The output data from the control unit can be a set of particular time intervals assigned to particular temperature points, or parameters, coefficients of the mathematical description of the temperature curve. In both cases, it is necessary to select the largest possible number of samples in order to record the nonlinearity of the temperature increase, which depends on the current room temperature. Another input data consist of the temperature of the heat transfer medium measured by a nut, which is the main variable and directly affects the dynamics of the temperature increase. The head according to the proposed invention, in connection with a superior control center, provides data concerning the response of the temperature of the heat transfer medium to a change in the percentage of opening of multiple valves, which indicates the flow rates to the heating elements at given hydraulic conditions.

[0036] The data are sent to the superior control center and provide information on the dynamics of the heating system across the rooms of the regulated building. It is also appropriate to include data on the external temperature of the environment in the calculation, which, based on the diversity of heat losses in individual rooms, affects the temperature increase. The compensation of the effects of the external temperature itself should be ensured by the equithermal control of the temperature of the heat transfer medium, but due to the fact that the heating system is a dynamic system, the increase in the temperature of the heat transfer medium may not compensate for the influence of the external temperature in all rooms equally.

[0037] Based on the collected instant decisions and changes in the configuration of the mathematical algorithm, it can evaluate the dynamics of the heating system and assign values to individual rooms, based on which it is possible to sort the heated rooms, beginning with the room with the fastest temperature increase all to the room where the heating system is not properly dimensioned. Based on the given values, an immediate change of settings may not be made, but changes in the configuration of the regulation courses of the pusher elements can be conveniently made after a selected time interval of building monitoring.

[0038] Thanks to the measured values from the head, the algorithm in the superior control center knows the temperature of the currently supplied heating heat transfer medium (usually water) to the heating system, the percentage of the opening of the valve (the course and position of the pusher element), the set temperature, the real temperature in individual rooms, the dynamics of their heating and / or cooling over time, or data on the CO 2 status (detection by the appropriate sensor to determine the real occupancy of the room). The algorithm adjusts the operating courses of the pusher elements in the heads, thereby changing the valve flow rates so that this new setting ensures more uniform temperature heating of all rooms in the building. Alternatively, the algorithm can specifically heat rooms based on other priorities, which may differ depending on the purpose of use of individual rooms.

[0039] Valve temperature sensing provides a whole range of new control options and benefits. The temperature of the valve is partly related to its position, and the temperature datum can be used to verify the correct function of the valve. Valves and heads are often supplied and installed separately and they come from different manufacturers. Various procedures are used to match the valve and head interaction, for example, the engine load is measured when moving the pusher element in the extreme positions of the valve. The head tries to adjust the travel of the pusher element in a range that corresponds to the extreme positions of the valve pin. The extreme positions in the movement of the valve pin determined according to the engine load are determined with a relatively large margin of error. The valve temperature reading is a direct parameter for the correct assessment of whether the valve is fully closed. With the help of the proposed invention, it is possible to precisely adjust the range of movement of the pusher element of the head. This increases the service life of the valve seal, which is not unnecessarily pushed through in a state where it already seals sufficiently. This also reduces the engine's electrical energy consumption, which is particularly advantageous in the battery-powered version of the head. Adjusting the range of movement of the pusher element according to the temperature profile on the valve nut can be repeated within different algorithms and at different time intervals. The correctly set range of movement of the pusher element is checked in the background of other control steps during the functionality of the control system, or the aforementioned algorithms can be activated via a superior control center. If a difference in the optimal range compared to the previous detection is detected, this indicates wear of the valve seal or loosening of the nut. A sudden difference in the optimal range of movement of the pusher element can directly indicate unauthorized loosening of the nut. Detection of unauthorized manipulation of the nut is especially important in public areas, where it can signal an attempt at theft or an attempt to increase the temperature in the room compared to the centrally set temperature. Loosening the nut moves the pusher element away from the valve and thus prevents the valve pin from being pressed into the fully closed position. Even in situations where the temperature already exceeds the desired room temperature, the valve head may not be able to close the valve. Measuring the temperature of the nut can reveal a situation where the flow of the heat transfer medium does not stop despite the instruction to close. Previously measured values can be archived in a superior control center or directly in the valve head.

[0040] The proposed invention provides the heating system administrator with information that a closed valve is allowing heat transfer medium (usually water) to flow, i.e. that it is not working according to the required control. In this case, the heating element (usually a radiator) supplies heat to the room even when it is not needed, thereby wasting energy. Measuring the valve temperature also allows for the identification of faults in remote elements of the heating system, for example, problems with the flow of heat transfer medium to the valve can be identified. If the temperature of the heat transfer medium is insufficient (for example, due to reasons on the part of the boiler room), this will manifest itself in the fact that the room cannot be heated to the required temperature despite the administrator's request. The valve will be 100% open by the head, but the temperature in the room does not rise and the temperature sensor on the nut measures a low temperature. In this case, the temperature reading from the valve nut is a very useful tool for remote analysis and problem solving. Also, based on a longer time interval of temperature monitoring, it is possible to detect possible anomalies in the supply of heat transfer medium. Any loosening of the nut can be compensated for in the system according to this invention without the need for physical intervention on site by changing the range of movement of the pusher element to achieve complete closure of the valve, while appropriately using the information on the current temperature of the valve. The nut can be loosened for various reasons, for example, when attempting to steal the head or as a result of unauthorized manipulation with the aim of increasing the temperature in the room, or due to the effect of long-term vibrations, and so on. From the point of view of the system administrator, such unwanted loosening of the nut can be understood as spontaneous or arbitrary, whereby the actual cause of the loosening is not significant.

[0041] The system according to the proposed invention may include at least one control unit contactlessly connected to the heads and also to the superior control center. Preferably, the control unit is provided with a room temperature sensor and sends these data to the superior control center. The control unit may also serve as a concentrator of communication channels from several heads and all elements - heads and control units may form a MESH network for reliable communication in larger buildings and spaces. The control unit may also form a control element by which the user enters or adjusts the desired thermal comfort state, while the superior control center may evaluate such an instruction according to the set rules.

[0042] The system preferably also includes a CO 2 sensor, which can indirectly but statistically very reliably determine the occupancy of the room. The CO 2 sensor can be part of the head or it is preferably part of the control unit, which is usually placed on the wall of the room. The CO 2 sensor is able to determine the presence of people based on exhaled CO 2 , and it has been found that a measurable increase in CO 2 occurs relatively quickly after a person enters the room. Ventilating the room reduces the volume of CO 2 , but this effect is relatively constant for each room and is conditioned by the position of the CO 2 sensor, the ventilation method and the number of people in the room. Information about the actual presence of people in the room can be used in several algorithms to control the heating system. For example, an initially higher classroom temperature programmed according to the class schedule can be reduced if there is no increase in CO 2 within the set time from the start of the planned lesson, which essentially means that the classroom is empty and there is no reason to heat it.

[0043] In another advantageous algorithm, the occupancy data of the heated space can be used to adjust the required heating output by taking into account the natural heat output of a person, which is usually in the range of 80W - 100W per person. According to the number of people, which is calculated from the measured CO 2 volume, it can be calculated what heat output the people in the heated space have supplied. The increase in temperature in the room can be evaluated not only as a manifestation of the heat supplied to the heating element, but it can also be analyzed by taking into account the heat output of the people in the room. This heat contribution can be significant if the number of people is high (for example, a theater, a school auditorium) and the heat losses of the room are relatively small. In some cases, the CO 2 sensor can also be located in the head according to the proposed invention, while the heat in the vicinity of the heating element does not essentially affect the CO 2 content in the air. This allows the sensing of the CO 2 volume even in a system where the control units do not have such functionality.

[0044] In one advantageous arrangement, the superior control center is at least partially located in the cloud with access from the system supplier, who, thanks to the cloud architecture, can process and evaluate a larger amount of measured data. The data collection then allows the use of machine learning programs, including advanced artificial intelligence, which can find further correlations in the data and generate suggestions for increasing heating efficiency.

[0045] The advantage of the proposed invention is the increase in the control and monitoring functions of the head and the system, too, while the installation of the heads is not complicated. The head has retained its previous functionality and additionally provides information on the temperature of the nut on the valve, which corresponds with only a small and stable margin of error to the temperature of the heat transfer medium at the inlet to the heating element. The temperature information can be used to optimize the course of the pusher element and also for possible hydraulic balancing of flows in multiple branches with heating elements.Description of drawings

[0046] The invention is further disclosed by means of figures 1 to 16. The details and relative sizes shown, for example the size of the casing, are for illustration purposes only, or the relative sizes are adjusted for clarity, and the details shown cannot be interpreted as limiting the scope of protection. Figure 1 shows a side view of the head with nut before the connection to the valve. Figure 2 shows the installation of the head onto the valve. The arrows show the insertion of the head and the screwing of the nut onto the thread of the valve. The valve is shown on the left side of the figure. Figure 3 shows a cross-sectional detail of the head, where the casing with the temperature sensor is pressed against the surface of the nut, which is placed on the stop of the circumferential collar. The body of the head is shown without internal components for clarity. A cavity with a spring is visible in the body, which presses the casing against the nut. Two wires emerging from the housing pass through an opening at the bottom of the cavity. Figure 4 schematically shows other embodiments, demonstrating how the casing can be pressed against the nut, with the embodiments from left to right show the casing pressed against the nut: around the circumference of the nut, in the nut groove, on the inner surface of the nut. Figure 5 shows an embodiment where the casing is inserted into a lever extending from the rear wall of the body of the head. The casing touches the nut on an inclined front surface and the spring is in the form of a flexible lever. Figure 6 shows the body of the head with a cavity for inserting the sleeve without the nut fitted, showing a detail of the stops that hold the nut in the desired position with rotational freedom. Figure 7 is a diagram of connection of a heating system with heads that wirelessly send valve temperature data to a superior control center, whereby they can communicate with the superior control center directly and / or via a control unit. The figure shows only three controllers, but there can be thousands of them in a system. In figures 8 and 9, the plastic insulation is mounted on the nut in a cross-sectional view. The internal components of the head, with the exception of the spring, the casing with the temperature sensor and the wires, are not shown. Figure 8 is a three-dimensional view, figure 9 is a side view. Figure 10 is a graph of the temporal course of the temperature measured on the valve nut, the supply temperature of the heat transfer medium, the return temperature and the valve opening course expressed in percentage. The graph shows a very good correlation between the temperature measured on the valve nut and the supply temperature, the detected margin of error (deviation) is stable, which shows that the temperature measurement according to the present invention is well usable for controlling the heating system. The dates and times are shown on the temporal axis. Figure 11 is a graph showing an example of the temperature and valve opening rate for an optimally functioning system in a room. Figures 12 to 14 show the changes that indicate the different diagnosed states against this graph. The legend for assigning the curves to the individual data streams is shown in the lower right part of the figure, which also applies to figures 12 to 14. Figure 12 shows a graph with measured data that detect a loose head, i.e. a loose nut that connects the head to the valve. Figure 13 is a graph with measured data that detect a dismounted head. Figure 14 is a graph with measured data that detect an aerated radiator and / or a stuck valve. Figure 15 shows a graph with an example of the temperature profile, valve opening rate and CO 2 volume for an efficiently heated room. An inefficiently heated room is shown in the graph in figure 16, where the absence of people in the room is indicated by a CO 2 sensor. Examples of realization Example 1

[0047] In this example according to figures 1 to 3, 6, 7 and 10 the body 2 of the head 1 is made of plastic; the body 2 has two main parts connected by screws. The rear part comprises a zone of connection which has a tubular sleeve extending from the vertical wall of the body 2. Through the opening in the wall, a pusher element for operating the valve pin passes through the inside of the sleeve. The zone of connection has essentially the same realization as is known in the prior art. Similar to the prior art, components for moving the pusher element are located inside the body 2, in particular a DC electric engine, a gear mechanism connected to the engine output, a power source in the form of a battery, an electronic control circuit for controlling the engine and a contactless communication element for connecting to a superior center 8. The difference in the realization compared to the prior art lies in the integration of a temperature sensor into the rear part of the body 2. The designation "rear" describes the side opposite the position that the user sees as the front when looking at the head in the installed position. The rear wall of the body 2 is adjacent to the valve after the head 1 is installed.

[0048] In this example, a commercially available encapsulated NTC temperature sensor is used as the temperature sensor. The casing 4 is made of stainless steel, it has a cylindrical shape with a diameter of about 3 mm and a length of about 12 mm. The casing 4 is supplied as waterproof, two wires coming out of the casing 4 are connected to the control circuit inside the body 2. The measurement range of the temperature sensor is -20 to 110°C. The temperature sensor in the casing 4 is a thermistor with NTC characteristics, where its electrical resistance decreases with increasing temperature. The voltage is 3.7 V according to the voltage of the battery used. The temperature B-constant in this example is 3950 K ± 1%. The use of a commonly available sensor simplifies the production and the use of a thermistor reduces energy requirements, when the measurement phase and power supply of the temperature sensor do not occur continuously, but at set intervals and in set modes.

[0049] The casing 4 with the temperature sensor with a smooth metal surface provided a simple possibility of reliable slidable placement of the casing 4 towards the surface of the nut 3. A cavity 6 is formed in the rear part of the body 2, open towards the positions of the nut 3.

[0050] The cavity 6 has an axis parallel to the axis of the sleeve and it has a cylindrical shape that corresponds with a gap to the dimensions of the casing 4. The cavity 6 extends into the interior of the body 2 and at the same time the outer wall of the cavity 6 passes near the sleeve, thereby creating a bearing for the casing 4 up to the vicinity of the point of contact of the casing 4 with the nut 3. The outer wall of the cavity 6 also creates thermal insulation for the casing 4 so that the recorded data concerning the temperature of the nut 3 are as little affected by the ambient temperature as possible.

[0051] A compression cylindrical spring 5 is placed in the cavity 6, the first end of which leans onto the wall at the end of the cavity 6. The casing 4 is inserted into the cavity 6 so that the wires coming out of the casing 4 are passed through the opening at the end of the cavity 6 into the interior of the body 2, where they are subsequently connected to the control circuit, whereby the wires have a length that does not limit the movement of the casing 4 in the cavity 6. The casing 4 is pressed into the cavity 6 against the pretension of the compression spring 5 and then a nut 3 is placed on the sleeve. The connection zone on the sleeve contains elastic segments around the circumference, which form a circumferential collar on the outside of the sleeve. The elastic segments have a conical onset, due to which, when the nut 3 is pushed onto the sleeve, they deform inwards and the nut 3 is axially displaced towards the circumferential collar. After the edge of the nut 3 falls behind the collar, the nut 3 is freely rotatable on the sleeve and at the same time the front wall of the nut 3 limits the extension of the casing 4 from the cavity 6. Now the casing 4 is permanently pressed against the nut 3, however, this pressure does not prevent the rotation of the nut 3. The friction between the smooth metal casing 4 and the smooth metal surface of the nut 3 is low.

[0052] The length of the course of the casing 4 in the assembled state is relatively short, it is sufficient if it overcomes the axial gap of the nut 3, while this axial gap ensures smooth rotation of the nut 3 on the sleeve and also correct locking of the nut 3 behind the edge of the collar after deformation of the elastic segments. Thus, a course of up to 5 mm is sufficient, preferably up to 3 mm, particularly preferably up to 2 mm. Thanks to this, the deposition of the casing 4 is permanently reliable and the movements of the casing 4 do not lead to stress on the wires or to tearing of the insulation of the wires against the spring 5.

[0053] During installation, the nut 3 is screwed onto the valve, opposite the valve pin there is the pusher element of the head 1. The nut 3 in this example is made of brass and its surface is decoratively electroplated. The nut 3 has grooves or recesses on the circumference to facilitate screwing onto the valve. The metal material of the nut 3 conducts heat well and transfers the temperature from the heat transfer medium through the valve to the housing 4 with the temperature sensor.

[0054] The valve temperature sensing is advantageously used in this example for automatic management of the heating control system. Thanks to the head 1 with integrated valve temperature sensing, notifications about a poorly sealing valve can be sent, for example by e-mail or SMS, which allows the system administrator to make a correction, for example to correct the working course of the pusher element on the head 1 (the pusher element lift) or to physically tighten the loose nut 3 on the valve, or to replace the malfunctioning valve, or to warn about possible vandalism or theft.

[0055] The integration of the valve temperature sensor in the head 1 enables new functionality within the head 1 itself, which is able to regulate the extent of the movement course of the pusher element according to the valve reaction, i.e. according to the actually recorded flow stop, where this stop is reflected in a drop in temperature compared to the ambient temperature. At the same time, the head 1 is able to bring to the superior control center 8 new data, which can be used to analyze the flow dynamics of the heat transfer medium and subsequently it is possible to influence the heating dynamics within the system with set conditions, for example to compensate for the hydraulic imbalance of the system.

[0056] In this example according to figure 7, several heads 1 in one room are connected to a control unit 9 and this unit 9 communicates wirelessly with a superior control center 8, with all communication elements being adapted to create a MESH network. The control unit 9 contains a room air temperature sensor and a CO 2 sensor for assessing the actual occupancy of the room.Example 2

[0057] The temperature sensor according to figure 5 is encapsulated in a copper casing 4 which is inserted into the hole in the lever before the nut 3 is mounted. The lever is formed on the rear wall of the body 2 of the head 1 and the elastic pressure of the lever is derived from the deformation of the plastic material, which is formed after the nut 3 is pressed onto the connection zone sleeve.Example 3

[0058] The embodiment according to example 1 is supplemented with insulation 7, which is shown in figures 8 and 9. The nut 3 is provided with insulation 7, which consists of a plastic hoop mounted after the installation of the head 1. In this example, the insulation 7 also performs the function of a seal, which protects against unauthorized manipulation of the nut 3. By reducing the heat transfer from the nut 3 to the surroundings, the accuracy of measuring the temperature of the heat transfer medium itself is improved.

[0059] The plastic hoop may be hollow or it may have an interior filled with insulating material. The insulation 7 may carry a marking in the form of a number that is stored in the system or it may have an RFID chip for remote reading when checking for integrity. The RFID chip may have an antenna wound in such a way that if the integrity of the ring is violated, the antenna will tear and the absence of a response to the reader signal detects a problem with the integrity of the seal.Example 4

[0060] In other examples, the casing 4 may be pressed against the nut 3 according to the diagrams in figure 4. The contact of the casing 4 in the formed groove on the surface of the nut 3 will increase the contact area for heat transfer.Example 5

[0061] In this example, an SMD temperature sensor is used, mounted on a small plate, which is inserted into a groove in the stop of the circumferential collar. The circumferential collar has a group of segments, which, thanks to the elasticity of the plastics used, allow the insertion of a metal nut 3. When inserted, the front of the nut 3 is pressed against the sloped, conical surfaces of the stops, which creates a radial force compressing the segments towards the axis of the circumferential collar. After the front of the nut 3 passes the edge of the stops, the segments return to their original position by elastic deformation, but at least one segment, which carries the plate with the SMD temperature sensor, is designed to create a preload against the inner surface of the nut 3 in order to ensure the pressure of the SMD temperature sensor against the inner surface of the nut 3. This pressure scheme corresponds to figure 4 on the right.Example 6

[0062] All data on the valve opening position, temperature data on the individual valve nut 3, room temperature data and possibly also CO 2 volume are collected in a cloud storage, which is accessible to the heating system administrator and the system supplier. Statistical procedures and analysis of recurring relationships can be used to identify, test and subsequently deploy further optimization procedures to increase energy savings while maintaining thermal comfort. For example, a temperature inertia curve is obtained for individual rooms in the building after the end of active heating and, taking into account the planned end of activity on a given day of the week, the heat input in the relevant room is limited in time, while data on the current outdoor temperature, which has an impact on heat loss, can also be used.Example 7

[0063] In this example, according to figures 11 and 12, the loosening of the head 1 from the valve is detected. When evaluating the data, the correlation of the measured temperature on the nut 3 with the desired (set) temperature, the actually measured room temperature measured by the control unit 9 (e.g. on the wall), or the second temperature sensor in the head 1 and the information about the opening status of the valve mechanically controlled by the head 1 in percentage (0 to 100%), are monitored.

[0064] As shown in figure 11, the system according to the invention, in the proper state of connection of the head 1 with the valve, after reaching the desired (set) temperature in the room, will give a command (opening to 0%) to the head 1 to close the valve, thereby completely preventing the flow of heat transfer medium into the radiator. Subsequently, the temperature of the heating medium measured by the sensor on the nut 3 gradually decreases. Depending on the duration of the cycle when the valve is in the closed position, the measured temperature on the nut 3 can gradually approach the values of temperatures measured in the ambient space. At the same time, the temperature in the room will stop increasing significantly above the desired, set value.

[0065] The system according to the invention, in the case of a loosened head 1, and after exceeding the desired (set) temperature in the room, will give a command (opening to 0%) to the head 1 to close the thermostatic valve, thereby completely preventing the flow of heat transfer medium into the radiator. Despite this instruction and the expected course according to figure 11, the temperature sensor in the casing 4 still records high temperature as shown in figure 12. This signals that the 0% opening position is reached in the head 1, but is not transferred to the valve, and thus it signals a partial unscrewing of the nut 3 from the valve body 2, when the pusher element of the head 1 does not press the valve shaft (waist) to the stop. With such a loosening, the temperature on the nut 3 is still sensed and this temperature still indicates the temperature of the heat transfer medium. At the same time, the temperature in the ambient space can increase above the desired (set) temperature. The state detected in this way shows that the nut 3 is loosened, for example, that the personnel in the given room wanted to achieve a higher heating temperature than that set in the system and loosened the nut 3.

[0066] A similar detection pattern may also indicate a valve leaking in the closed position, which may be caused by a damaged valve seat seal, a mechanical obstacle stuck in the valve body, and so on. If, after detecting a loose head 1, it is determined by on-site inspection that head 1 was not loose, a conclusion can be drawn about a malfunctioning closed position of the valve.Example 8

[0067] In this example, according to figures 11 and 13, the removal of the head 1 from the valve is detected. When evaluating the data, the correlation of the data is monitored similarly as in Example 7.

[0068] During the heating cycle (heating demand), the system requests the head 1 to fully or partially open the valve flow to the radiator. During this cycle, the sensor in the casing 4 records the maximum or increased temperatures of the heat transfer medium depending on the valve opening (compared to the state when the valve is closed). When the required temperature is reached or exceeded in the room, the system gives the command to the head 1 to completely close the valve (0% opening). Subsequently, in the case of a properly functioning state, the temperature measured on the nut 3 begins to gradually decrease. Depending on the duration of the cycle when the valve is in the closed position, the measured temperature can approach the values of the temperatures measured in the room, which correspond to the graph in figure 11.

[0069] If the head 1 is demounted from the valve during the heating cycle (when the valve opening is greater than 0%), the temperature sensor on the nut 3 will record a sudden (jump) decrease in the temperature of the heat transfer medium during a short period of time, as shown in figure 13. Subsequently, the temperatures on the nut 3 represent values approaching the air temperature at the location where the head 1 was placed. Such a temperature is measured regardless of the command to open the valve.

[0070] If the head 1 is demounted from the valve at a time when there is no heating requirement, e.g. during night-time setback and the valve is closed, and when the temperature on the nut 3 shows values approaching the room temperature, then the unwanted demounting of the head 1 will be manifested at the moment when the requirement for reheating the room comes. At that time, the system will give a command to open the valve, but the temperature sensor on the nut 3 will not register any increase in the measured values, which permanently copy the approximate values of the room temperature. An accompanying sign of both mentioned cases is also an increase in the room temperature above the required values set in the system.Example 9

[0071] In this example, according to figures 11 and 14, a radiator aeration or a branch aeration or a stuck valve is detected. When evaluating the data, the correlation of the data is monitored similarly to example 7.

[0072] As shown in figure 11, the system according to the invention, in the proper state of connection of the head 1 with the valve, after reaching the desired (set) temperature in the room, will give a command (opening to 0%) to the head 1 to close the valve, thereby completely preventing the flow of the heat transfer medium into the radiator. Subsequently, the temperature of the heating medium measured by the sensor on the nut 3 gradually decreases. Depending on the duration of the cycle when the valve is in the closed position, the measured temperature on the nut 3 may gradually approach the values of the temperatures measured in the ambient space.

[0073] If the valve remains stuck in the closed position or the radiator or the entire heating branch is aerated, the heat transfer medium cannot flow into the radiators. In such a case, the temperature sensor on the nut 3 continuously measures values that are close to the air temperature in the room according to figure 14. This is the case even if an instruction is received from the room heating system and the head 1 receives the command to open the valve to maximum flow. An accompanying sign of this undesirable condition is also the fact that the measured temperatures in the room are permanently significantly lower than the desired, set temperatures. The room is not heated enough.Example 10

[0074] In this example, according to figures 15 and 16, the heating efficiency of the respective room is evaluated. When evaluating the data, the correlation of the data is monitored similarly to example 7 and at the same time the CO 2 level is evaluated using a wall sensor, preferably as part of the control unit 9.

[0075] During the heating cycle (heating demand), the system sends a command to the head 1 to fully or partially open the valve flow to the radiator. During this cycle, the temperature sensor on the nut 3 records the maximum or increased temperatures of the heat transfer medium depending on the valve opening (compared to the state when the valve is closed). When the required temperature is reached or exceeded in the room and the system gives a command to completely close the valve (opening 0%), the temperature on the nut 3 gradually decreases. Depending on the duration of the cycle when the valve is in the closed position, the measured temperature can approach the values of the temperatures measured in the room. At the same time, the CO 2 level is also monitored in the room, which can reliably detect the presence of people in the room. The CO 2 level in the case of efficient heating increases or has a fluctuating course of measured values according to figure 15. The graph in figure 16 shows that the measured values of the CO 2 level in the room do not change during the monitored period, which means that the room is unoccupied and no activity is taking place in it. Based on the collected data, the system can detect in this case, according to graph in figure 16, that the relevant room is heated inefficiently.Example 11

[0076] An open window in a room can be evaluated by analyzing data from the head 1 and possibly also from the CO 2 sensor, without the need to install separate window opening sensors. A drop in ambient air temperature measured on the head 1, which is usually located on the radiator under the window, signals the opening of the window. To this can be added data on the drop in temperature measured by the control unit 9 on the wall and possibly also the trend of the drop in CO 2 , whereby all these changes are relatively rapid.

[0077] The data may also indicate unwanted additional heating by an electrical appliance or other unauthorized heat source. If additional heating by an electrical appliance is switched on in a room, there will be a rapid increase in the room temperature, which does not correspond to any possible heat gains, e.g. from the sun or from people in the room.Industrial applicability

[0078] The industrial applicability is obvious. According to this invention, it is possible to industrially and repeatedly produce and use valve heads for heating elements, while the head with integrated temperature sensing provides important information about the valve temperature, which can be used in the setting of the head and also in the setting of the entire heating system.List of symbols

[0079] 1 - head 2 - body 3 - nut 4 - casing 5 - spring 6 - cavity 7 - insulation 8 - superior control center 9 - control unit NTC - negative temperature coefficient SMD - surface mount devices

Claims

1. A heating element valve head with a body (2), where the head (1) inside the body (2) includes an electric engine, a gear mechanism, a control circuit, a communication element, and preferably also a power source, and where the body (2) has an outer zone of a connection designed for the connection to the heating element valve, whereby the zone of the connection is equipped by a rotationally placed nut (3) of the connection with a thread of the valve, is characterized by the fact, that a casing (4) with a temperature sensor is movably and / or flexibly placed in the body (2), whereby the casing (4) is pressed against a surface of the nut (3) and the temperature sensor is connected with the control circuit and / or with the communication element.

2. The heating element valve head according to the claim 1 is characterized by the fact, that the casing (4) is at least partially metallic or it includes at least one metal surface for a contact with the nut (3); the casing (4) is pressed onto the nut (3) by means of a spring (5) and / or by means of a deformation of flexible plastic holder in which the casing (4) is placed.

3. The heating element valve head according to the claim 1 or 2 is characterized by the fact, that the casing (4) is slidably and / or tiltably placed with a course oriented towards the nut (3).

4. The heating element valve head according to any of the claims 1 to 3 is characterized by the fact, that a front of the casing (4) axially touches a circumferential front outer surface of the nut (3) on a side of the body (2) or the casing (4) radially touches the circumferential front outer surface of the nut (3) or the casing (4) radially touches an inner surface of the nut (3), preferably the front of the casing (4) and / or a surface of the casing (4) falls into a circumferential dent or to a circumferential groove on the surface of the nut (3)5. The heating element valve head according to any of the claims 1 to 4 is characterized by the fact, that the casing (4) has a cylindrical shape, preferably the casing (4) has a length that is twice its diameter, which is up to 6 mm.

6. The heating element valve head according to any of the claims 1 to 5 is characterized by the fact, that the casing (4) is from a stainless steel or from a copper or from a bronze.

7. The heating element valve head according to any of the claims 1 to 6 is characterized by the fact, that the casing (4) is movably led in a cavity (6); an axis of the cavity (6) is basically parallel with an axis of a rotation of the nut (3), whereby the cavity (6) runs from inside the body (2) alongside a sleeve in which the nut (3) is rotably placed, preferably walls of the cavity (6) run all the way to the nut (3).

8. The heating element valve head according to any of the claims 1 to 7 is characterized by the fact, that the casing (4) is placed in a lever which runs from a rear wall of the body (2) and a pressure of the casing (4) to the nut (3) is led out by an elastic deformation of the lever.

9. The heating element valve head according to any of the claims 1 to 8 is characterized by the fact, that the casing (4) is a part of an SMD temperature sensor or the casing (4) is connected to the SMD temperature sensor.

10. The heating element valve head according to any of the claims 1 to 9 i s characterized by the fact, that the casing (4) is placed in a flexible stop of a circumferential collar which delimits a position of the nut (3).

11. The heating element valve head according to any of the claims 1 to 10 i s characterized by the fact, that the nut (3) has a thermal insulation (7) of at least a part of its outer surface, preferably the thermal insulation (7) is a part of a protective element for blocking an unauthorized rotation of the nut (3).

12. A system of a heating control, which includes at least two heating elements with a heat transfer medium, which have the valves for a control of an inflow of the heat transfer medium, where the heads (1) according to any of the claims 1 to 11 are connected to the valves, is characterized by the fact, that it includes a superior control center (8) which is connected with the heads (1) and the superior control center (8) has an assessment unit for processing data concerning the temperature of the nuts (3) by which the heads (1) are connected to the valves; preferably the system includes a control unit (9) contactlessly connected with the heads (1) and the superior control center (8), whereby the control unit (9) is equipped by a room temperature sensor.

13. A method of a control of a heating, where the heating system includes at least two heating elements with the heat transfer medium, with the valves and the heads (1) according to any of the claims 1 to 11, is characterized by the fact, that the temperature of the nut (3) by which the head (1) is screwed to the valve is sensed and a datum concerning the temperature of the nut (3) is assigned to a respective position of a pusher element in the head (1), preferably the datum concerning the temperature of the nut (3) is sent to the superior control center (8).

14. The method of the control of the heating according to the claim 13 i s characterized by the fact, that the superior control center (8) stores and assesses a temporal course of the temperatures measured on the individual valves and subsequently, pursuant to a demand entered in an algorithm, it sends the respective head (1) a command to limit a course of a movement of the pusher element, preferably this is done to ensure an even flow of the heat transfer medium in various branches of the heating system.

15. The method of the control of the heating according to the claim 13 or 14 i s characterized by the fact, that a point of an opening of the valve used to set an extreme position of the pusher element in the head (1) is determined in such a way that the pusher element moves from a closed position in gradual steps, whereby in each step it waits for a set temporal interval to ensure a heat transfer, and subsequently the temperature on the nut (3) is measured, whereby the increase of the temperature on the nut (3) above an ambient temperature sets a respective point of the course of the pusher element at which the valve begins to open, preferably the temporal interval to ensure the heat transfer lasts at least 10 seconds and the increase of the temperature on the nut (3) is at least 1°C above the ambient temperature.

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