EP2679918B1 - Verfahren zum Bestimmen der Verbindungen in einem Mischventil und Betätiger dafür - Google Patents

Verfahren zum Bestimmen der Verbindungen in einem Mischventil und Betätiger dafür Download PDF

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Publication number
EP2679918B1
EP2679918B1 EP12174271.2A EP12174271A EP2679918B1 EP 2679918 B1 EP2679918 B1 EP 2679918B1 EP 12174271 A EP12174271 A EP 12174271A EP 2679918 B1 EP2679918 B1 EP 2679918B1
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EP
European Patent Office
Prior art keywords
inlet
temperature
obturator
temperature value
controller
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EP12174271.2A
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English (en)
French (fr)
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EP2679918A1 (de
Inventor
Pär-Olof Lif
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LK Armatur AB
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LK Armatur AB
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Priority to EP12174271.2A priority Critical patent/EP2679918B1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve

Definitions

  • the present application relates to the field of heating systems, and in particular to the field of waterborne heating systems comprising mixing valves and the configuration thereof.
  • Mixing valves are well established in the technical field of waterborne heating systems and serve to provide a fluid, typically water, at a desired temperature.
  • Mixing valves are used for applications for providing water to a user, such as by water taps and showers. Mixing valves are also commonly used as part of heating systems which are based on waterborne heating. Examples of such heating systems are waterborne floor heating systems, also known as underfloor heating systems, and waterborne radiator heating systems.
  • the systems comprise a heating source, such as a heating boiler or a heat pump, a mixing valve, pipes for carrying the water, and heaters, such as radiators.
  • the mixing valve has an obturator to control the relative proportions between fluids which are passed into the mixing valve through inlets.
  • the obturator may be automatically operated, by being motorized, or be manually operable.
  • the mixing valve the fluids are mixed with each other, and passed out of the mixing valve through an outlet.
  • the mixed water are circulated in the system from the outlet of the mixing valve to the one or more heat dissipating elements, and circulated back partly into one of the inlets of the mixing valve and partly into the heater for reheating.
  • the heated water is provided to the other inlet of the mixing valve, where it is mixed with the unheated recirculated water.
  • the system is a closed heating system where the circulating water is reheated.
  • the two inlets of the mixing valve are thus connected to the reheated fluid inlet and a recirculation fluid inlet, respectively.
  • the outlet is connected to an outgoing fluid pipe.
  • mixing valves are differently arranged in terms of which inlet of the mixing valve that is to be connected to which fluid inlet.
  • An object of the present invention is to alleviate the above mentioned drawbacks and problems.
  • a further object is to provide a method for an improved configuration of a mixing valve, and an actuator thereof, especially in view of the connections of the inlets of the mixing valve.
  • this and other objects are achieved by a method for automatically determining the connection of a first inlet and a second inlet of a mixing valve in view of a low temperature fluid inlet and a high temperature fluid inlet, wherein the mixing valve further comprises an outlet, and an obturator arranged to set the mixing valve to allow a fluid flow between the first and second inlets and the outlet; wherein the mixing valve is part of a system further comprising: a motor for operating the obturator; a controller; and a temperature sensor arranged to sense a temperature of the fluid in or downstream of the outlet of the mixing valve; the method comprising: operating, by the motor, the obturator to a first position in which the second inlet is more open than the first inlet, thereby allowing a fluid flow between at least the second inlet and the outlet; providing, by the temperature sensor, at least a first temperature value to the controller; operating, by the motor, the obturator to a second position, in which the
  • the high temperature fluid inlet may correspond to the fluid inlet from the heater and may comprise reheated fluid from the system.
  • the low temperature fluid inlet may correspond to the fluid inlet from the system comprising directly circulated fluid.
  • the purpose of the method is to determine which position of the obturator that corresponds to which fluid inlet.
  • the two end positions of the obturator correspond to the first inlet and the second inlet, respectively, being in a fully opened state.
  • the provided temperature values correspond substantially to each of the fluid inlets.
  • determining the mutual size relationship of the provided temperature values is meant determining which of the temperature values that is higher than the other temperature value. It is not necessary to determine the difference between the temperature values, however it may be advantageous as will be disclosed later on.
  • the connections between the inlets of the mixing valve and the incoming fluid inlets are determined. Thereby, it is also determined which end position of the obturator that corresponds to which incoming fluid, and in particular to which temperature magnitude - high or low.
  • a plurality of first temperature values or a plurality of second temperature values is provided, the method further comprising generating a temperature curve over a measuring time based on the provided plurality of first or second temperature values, and wherein the step of determining the mutual relationship comprises determining a gradient of the generated temperature curve. By determining a gradient of the generated temperature curve, it may be determined if the temperature of the outlet fluid is increasing or decreasing.
  • the temperature gradient is increasing in a temperature curve, it may be determined that the inlet which is most open in the current obturator position, which corresponds to that temperature curve, is connected to the high temperature fluid inlet. If the temperature gradient is decreasing, the corresponding discussion applies, vice versa.
  • both a plurality of first temperature values and a plurality of second temperature values are provided.
  • a first temperature curve based on the plurality of first temperature values and a second temperature curve based on the plurality of second temperature values may be generated.
  • a first gradient and a second gradient may be generated for the first temperature curve and second temperature curve, respectively.
  • a more accurate method of determining the connection of the mixing valve may thus be provided, since two gradients may be utilized for the determination.
  • the installation may be performed without any required interaction with the user, and further without any specific knowledge of the user.
  • the method is both user-friendly and time-efficient. It is also less prone to human error during commissioning.
  • the intermediate position is the substantial central position between the two end positions of the obturator.
  • the temperature sensor measures on a fluid which is a mix of substantially equal proportions of the low temperature fluid and the high temperature fluid. It is thus ensured that the high temperature fluid constitutes substantially half the amount of the mix of fluids from the two fluid inlets.
  • test temperature value exceeds the minimum temperature value.
  • the method further comprises: initiating a timer by the step of operating the obturator to an intermediate position; and restarting, if the timer reaches a timeout period of time, the method from the step of operating the obturator to the first position.
  • the continuous evaluation of the test temperature value is ended after a timeout period of time.
  • the method does not get stuck in a continuous evaluation.
  • the timeout period of time is in a range of 5-90 minutes.
  • the threshold temperature difference value lies in a range of 1-10°C, preferably in a range of 3-6°C.
  • the determination of the connection of the inlets of the mixing valve may be based both on a determined gradient of a generated temperature curve and on a determined mutual size relationship between the provided first and second temperature values.
  • the threshold temperature value may lie in the lower range of the preferred interval, and still provide an accurate determination.
  • the method may further comprise: waiting a period of time before the step of providing the first temperature value and/or the second temperature value, preferably before both.
  • the method further comprises that the period of time is extended if the method is restarted due to that the determined temperature difference does not exceed the threshold value.
  • the method may further comprise: indicating the position, of the first and second positions, corresponding to the lower temperature value as a low temperature mode position; and indicating the position, of the first and second positions, corresponding to the higher temperature value as a high temperature mode position.
  • the first and second positions are correlated to a high temperature mode and a low temperature mode, i.e. the high temperature position and the low temperature position, respectively, of the obturator.
  • the indication is preferably a digital indication which is achieved by saving, in e.g. a memory, the correlation between the end positions of the obturator and the high temperature mode and the low temperature mode, respectively, such that the controller knows which way to operate the obturator in order to increase or decrease the temperature of the outgoing fluid.
  • the digital indication may be supplemented by a visual indication in connection to a manual actuating element, in order to inform the user of in which direction to operate the manual actuating element in order to achieve a desired change in temperature.
  • the first and second positions may be predetermined positions. Further, the method may comprise: setting the first position to the position of the predetermined positions being closest to a current position of the obturator.
  • the method may be performed in a quicker manner.
  • the obturator's current position may be kept track on by the controller, and thereby the controller may also determine which position of the predetermined positions that is the closest.
  • closest is meant which position that it takes the least time to operate the obturator to.
  • the two positions which are going to be the first and second positions are predetermined on beforehand, however which position that is the first is determined based on the current position of the obturator.
  • the first inlet is closed when the obturator is arranged in the first position, and the second inlet is closed when the obturator is arranged in the second position.
  • closed is meant that the inlet is substantially closed, i.e. the inlet does not need to be absolutely closed in the meaning that there does not exists any smaller leaks or similar.
  • the first temperature value is provided by measuring substantially only on fluid from the second inlet and the second temperature value is provided by measuring substantially only on fluid from the first inlet.
  • the first temperature value and second temperature value more distinctly represent the respective inlets, and thus a more accurate and quick determination of the connections may be achieved.
  • the temperature sensor is arranged within 3 meters, preferably within 1 meter, downstream of the outlet.
  • the first and second temperature values are measured close to the outlet, by which it has not changed much in temperature and thus correspond well to the actual temperatures of the fluids at the respective inlets.
  • a waiting period of time before providing a temperature value which should correspond to a certain position of the mixing valve may be shorter with a sensor arranged closer to the outlet.
  • the motor may be a variable speed motor.
  • the obturator may be operated sufficiently fast such that the method may be performed within a reasonable time, making the method very time-efficient.
  • an actuator for automatically determining the connection of a first inlet and a second inlet of a mixing valve in view of a low temperature fluid inlet and a high temperature fluid inlet
  • the mixing valve further comprises an outlet, and an obturator arranged to set the mixing valve to allow a fluid flow between the first and second inlets and the outlet
  • the actuator comprising: a motor for operating the obturator; a connector for connecting the motor to the obturator; a controller; and a temperature sensor adapted to be arranged in or downstream of the outlet of the mixing valve; wherein the motor is arranged to operate the obturator to a first position in which the second inlet is more open than the first inlet, thereby allowing a fluid flow between at least the second inlet and the outlet; wherein the temperature sensor is arranged to provide at least a first temperature value to the controller; wherein the motor is further arranged to operate the obturator to
  • the actuator may further comprise a manual actuating element, which is arranged to be operable connected to the obturator of the mixing valve. By turning the manual actuating element, the obturator of the mixing valve is turned correspondingly.
  • the manual actuating element may be operated by a user who desires to increase or decrease the temperature of the outgoing fluid into the heating system.
  • Which positions of the mixing valve that the end positions of the manual actuating element corresponds to may be indicated on the actuator by the manual actuating element, i.e. that one of the end positions corresponds to the high temperature mode and the other of the end positions corresponds to the low temperature mode. In that way, the user knows in which direction the manual actuating element is to be operated in view of the desired temperature.
  • the indication may be achieved by way of light emitting diodes (LEDs) which are set to a color indicative of the temperature mode. The colors of the LEDs are set when the connection of the inlets of the mixing valve in view of the fluid inlets are determined, i.e. not before the method for determining the connection of the first and second inlet of the mixing valve has been performed.
  • LEDs light emitting diodes
  • the actuator is arranged to be removable connected to the obturator of the mixing valve.
  • the removable connection is achieved by the motor being operable connected to the obturator.
  • the connection between the motor and the obturator is achieved by the connector of the actuator.
  • the actuator may be temporarily connected to a mixing valve in order to determine the connections of the inlets to the mixing valve to the fluid inlets. Thereafter, the actuator may be removed, and possible replaced by another more permanent actuator.
  • the actuator may thus function as e.g. a transportable diagnostics tool for determining the connection of already installed mixing valves. The tool may be useful for e.g. an installation engineer. Further, the actuator may replace an existing actuator in a heating system. Thus, a heating system may be upgraded by only replacing the actuator connected to the mixing valve.
  • a system for mixing fluids comprising: a mixing valve comprising a first inlet and a second inlet being connected to a low temperature fluid inlet and a high temperature fluid inlet, an outlet, and an obturator arranged to set the mixing valve to allow a fluid flow between the first and second inlets and the outlet; and an actuator for automatically determining the connection of the first inlet and the second inlet of the mixing valve in view of the low temperature fluid inlet and the high temperature fluid inlet, the actuator comprising: a motor for operating the obturator; a connector for connecting the motor to the obturator; a controller; and a temperature sensor adapted to be arranged in or downstream of the outlet of the mixing valve; wherein the motor is arranged to operate the obturator to a first position in which the second inlet is more open than the first inlet, thereby allowing a fluid flow between at least the second inlet and the outlet; wherein the temperature sensor
  • a heating system for a building is illustrated in figure 1 , which provides an example of a system in which the method and actuator of the present application may be utilized.
  • the heating system comprises a heater 15, a heat dissipating element 16, and a mixing valve 10.
  • the heating system is typically waterborne, i.e. the heat carrier in the heating system is water. It is understood that other heat carrying fluids are also feasible within the scope of the present invention. However, in the embodiments disclosed in the following, water is used as heat carrier.
  • the water is passed around in the system in pipes, which connect the different elements of the system together.
  • the water is re-circulated in the system, i.e. essentially the same water is passed around in the system.
  • the water is passed directly or indirectly to the mixing valve 10.
  • One amount of water is passed directly to the mixing valve 10.
  • the other amount of water is passed through the heater 15 in which it is reheated.
  • the reheated water is passed further to the mixing valve 10.
  • the mixing valve 10 has two inlets: a first inlet 11 and a second inlet 12. Further, the mixing valve 10 has an outlet 13.
  • the mixing valve may optionally also comprise a further outlet (not shown) and/or a further inlet (not shown). In one embodiment (not disclosed), the mixing valve 10 may comprise three inlets and one outlet. Two of the inlets are high temperature inlets from two different heaters, and the third inlet is a low temperature inlet comprising re-circulated water from the heating system. It is understood that also such configured mixing valve 10 may also be utilized for the present invention and fall within the scope of the present claims.
  • the directly circulated water is passed into the first inlet 11, and the reheated water is passed into the second inlet 12.
  • the reheated water typically has a higher temperature than the directly circulated water.
  • the mixing valve 10 is connected to an actuator 20 for controlling the function of the mixing valve 10.
  • the actuator 20 is designed to operate using motive energy which may be electrical, pneumatic, hydraulic, etc or a combination of these. Movement is limited by travel, torque or thrust.
  • the actuator 20 and its connection to the mixing valve 10 is illustrated in figure 2 .
  • An obturator 25 in the mixing valve 10 is arranged to be operated so as to vary the proportion between the water passed into the first inlet 11 and the water passed into the second inlet 12.
  • the obturator 25 controls the proportion by controlling how much the respective inlet is open.
  • the temperature of the mixed water is varied.
  • the mixed water of a desired temperature is passed out of the mixing valve 10 through the outlet 13 and further to the heat dissipating element 16, in which the heat of the water is heating the environment.
  • the obturator 25 is not limited to any particular obturator type.
  • Nonlimiting examples of feasible obturator types include obturators with linear movement and obturators with turning movement.
  • the obturator 25 may be operated either by a motor 21 or a by a manual actuating element 23.
  • the motor 21 is operable connected to the obturator 25 by a connector (not illustrated).
  • the connector may be an adaptor.
  • the connector may be a separate part in view of the actuator 20.
  • the motor 21 is a variable speed motor which may be operated with a higher speed than conventional motors used for motorized actuators.
  • the obturator 25 may be operated sufficiently fast such that the method may be performed within a reasonable time, making the method very time-efficient and usable.
  • a controller 22 is arranged to operate the motor 21.
  • the controller 22 may be connected to a memory 24, in which settings, modes, positions, etc. may be saved.
  • the controller 22 may be a microprocessor, or any other suitable type of controller.
  • the temperature sensor 14 is arranged to sense a temperature of the water in or downstream the outlet 13. Preferably the temperature sensor 14 is arranged within 3 meter, in particular within 1 meter, of the outlet 13. The temperature sensor 14 may be arranged in direct or indirect connection with the water which temperature is to be sensed.
  • the temperature sensor 14 is connected to the controller 22, such that the temperature sensor 14 is arranged to provide a temperature value, representing the measured temperature, to the controller 22.
  • the connection between the temperature sensor 14 and the controller 22 may be a cable connection or a wireless connection.
  • a simple and time-efficient determination of the connection to the mixing valve to the water inlets is achieved.
  • the determination is performed automatically, i.e. without the requirement of any interaction with a user.
  • figure 3 such a method for automatically determining the connection of the first inlet 11 and the second inlet 12 to the mixing valve 10 is disclosed. The following description is based on that, after the installation of the mixing valve 10 in a heating system, such as in figure 1 , it is not defined to which of the reheated water inlet and the directly circulated water inlet that the first inlet 11 and the second inlet 12, respectively, are connected.
  • the obturator 25 is operated to a first position.
  • the obturator 25 In the first position, the obturator 25 is arranged such that the second inlet 12 is more open than the first inlet 11.
  • the obturator 25 is arranged such that the first inlet 11 is substantially closed, i.e. that the obturator 25 is set to one of its end positions.
  • a first temperature value is provided by the temperature sensor 14 to the controller 22.
  • the controller 22 saves the temperature value in the memory 24.
  • the obturator 25 is operated to a second position.
  • the obturator 25 In the second position, the obturator 25 is arranged such that the first inlet 11 is more open than the second inlet 12.
  • the obturator 25 is arranged such that the second inlet 12 is substantially closed, i.e. that the obturator 25 is set to the other of its end positions.
  • a second temperature value is provided by the temperature sensor 14 to the controller 22.
  • the controller 22 saves the temperature value in the memory 24.
  • the controller 22 has been provided with two temperature values, which are accessible via the memory 24.
  • the first temperature value corresponds to the temperature of output water substantially from the second inlet; and the second temperature value corresponds to the temperature of the output water substantially from the first inlet.
  • a mutual relationship between the two provided temperature values is determined by determining the mutual size relationship of the first temperature value and the second temperature value is determined. This step is performed by the controller 22.
  • mutual size relationship is meant that it is determined which of the first temperature value and the second temperature value that is higher than the other.
  • the connection of the inlets of the mixing valve 10 to the first inlet 11 and second inlet 12 is determined, by the controller 22, based on the determined mutual relationship, i.e. the mutual size relationship in this embodiment. If the first temperature value is higher than the second temperature value, the second inlet 12 is determined to be connected to the high temperature water inlet, i.e. the water inlet providing reheated water from the heater 15. Consequently, the first inlet 11 is determined to be connected to the low temperature water inlet, i.e. the water inlet providing directly circulated water from the heating system. The opposite determination is realized if the second temperature value is higher than the first temperature value.
  • steps 301-306 may be performed according to a second embodiment, which will now be described with reference to figure 3 .
  • the obturator 25 is operated to a first position.
  • the obturator 25 In the first position, the obturator 25 is arranged such that the second inlet 12 is more open than the first inlet 11.
  • the obturator 25 is arranged such that the first inlet 11 is substantially closed, i.e. that the obturator 25 is set to one of its end positions, i.e. a fully closed or a fully opened position.
  • a plurality of first temperature values is provided by the temperature sensor 14 to the controller 22.
  • the plurality of first temperature values is provided over a first period of time.
  • the controller 22 saves the plurality of first temperature values in the memory 24. Further, a first temperature curve over the first period of time is generated based on the provided plurality of first temperature values.
  • a plurality of second temperature values is provided by the temperature sensor 14 to the controller 22.
  • the plurality of second temperature values is provided over a second period of time.
  • the controller 22 saves the plurality of second temperature values in the memory 24. Further, a second temperature curve over the second period of time is generated based on the provided plurality of first temperature values.
  • the controller 22 has been provided with two pluralities of temperature values, which each are accessible via the memory 24.
  • the plurality of first temperature values corresponds to the temperature of output water, substantially from the second inlet; and the plurality of second temperature values corresponds to the temperature of the output water substantially from the first inlet.
  • the controller 22 may also generate a first temperature curve and a second temperature curve.
  • determining a gradient of a temperature curve it is determined if the temperature is increasing or decreasing.
  • the gradient may be determined at any point of the temperature curve.
  • the gradient may be determined as a mean value of a number of gradients for a temperature curve.
  • a first gradient is determined for the first temperature curve, and a second gradient is determined for the second temperature curve.
  • connection of the inlets of the mixing valve 10 to the first inlet 11 and second inlet 12 is determined, by the controller 22, based on the determined mutual relationship, i.e. the determined gradients. It may be sufficient to determine the connection based on one of the first gradient and the second gradient. However, it is preferred that both the first and the second gradients are utilized in the determination.
  • the gradient provides an indication of the slope of the temperature curve, i.e. if the temperature is increasing or decreasing. If the temperature curve is increasing, this is an indication that the inlet which is currently most open, e.g. the second inlet 12 when the obturator is arranged in the first position, corresponds to the low temperature water inlet. Correspondingly, if the temperature curve is decreasing, this is an indication that the inlet which is currently most open corresponds to the high temperature water inlet.
  • the first position and second position may be determined to correlate to a high temperature mode and a low temperature mode, respectively. If the first inlet is determined to be connected to the low temperature water inlet, consequently the second position, in which the first inlet is more open than the second inlet, is determined to correspond to the low temperature mode. In this preferred embodiment, where the second position is one of the end positions of the obturator 25, that end position is determined to corresponds to the low temperature mode. Thus, in order to achieve a lower temperature of the output water, the obturator 25 shall be operated towards the low temperature mode position.
  • the correlation between the obturator positions and temperature modes is saved as a digital indication in the memory 24, and is accessible to the controller 22, such that the controller 22 thereafter knows in which direction to operate the obturator 25 in order to achieve an increase or decrease of the temperature of the output water.
  • the temperature modes may further be indicated by the manual actuating element 23, such that it is indicated to a user in which direction to operate the manual actuating element 23 in order to increase or decrease the temperature.
  • the indication may be achieved by visual indicators, such as by LEDs, which are disposed at or in connection to the manual actuating element 23. At one end position of the manual actuating element 23, a LED of a particular color such as blue, may indicate a low temperature mode. At the other end position, a LED of another particular color such as red, may indicate a high temperature mode.
  • an intuitive indication of in which direction to actuate the manual actuating element 23 is provided.
  • the visual indicators are configured by the controller 22 after the connection of the inlets to the mixing valve 10 has been determined.
  • FIG 4 Another embodiment of the method is illustrated in figure 4 .
  • This method includes all steps of the preceding method, i.e. operating 301 the obturator 25 to a first position; providing 302 at least a first temperature value; operating 303 the obturator 25 to a second position; providing 304 at least a second temperature value; determining 305 the mutual relationship between at least two of the provided temperature values; and determining 306, based on the determined mutual relationship, the connection of the inlets of the mixing valve 10 to the fluid inlets.
  • Preceding the step 302 of providing a first temperature value is a step 401 of waiting a period of time.
  • outlet water mixed according to the proportions of the first position of the obturator 25 may flow downstream of the outlet 13 for a while before the first temperature value is provided.
  • the period of time is preferably within a range of 40-400 seconds.
  • preceding the step 304 of providing a second temperature value is a step 402 of waiting a period of time.
  • the period of time preceding the steps of providing the first and second temperature values may be of the same length or be of different lengths.
  • the periods of time is controlled by the controller 22.
  • a step 403 of determining whether any of the first temperature value and the second temperature value exceeds a minimum temperature value is performed by the controller 22.
  • This step 403 is provided in order to ensure that the heating system is active when the determination is performed, and thus has reached the minimum temperature value.
  • active is meant that the heater 15 is running and heating the water provided through the high temperature inlet. Since this is the normal mode of the heating system, it is advantageous that the determination is performed with the system in this mode. Thus, a more accurate determination may be achieved.
  • the minimum temperature value lies preferably in a range of 30-50°C.
  • the method is continued without any particular measures.
  • the method goes into a standby mode in which a sufficient temperature of the output water is awaited.
  • the standby mode comprises a first step 404 of operating the obturator 25 to an intermediate position in which each of the first inlet 11 and the second inlet 12 is at least partly open.
  • the intermediate position is the central position of the obturator 25, i.e. between the two end positions of the obturator 25.
  • the first inlet 11 and second inlet 12 is open to substantially the same degree.
  • step 405 of providing a test temperature value by the temperature sensor 14 to the controller 22 determines if the test temperature value exceeds the minimum temperature value. If it does not, the step 405 of providing a test temperature value and the step 405 of evaluating the test temperature value is repeated. Thus, the steps 405 and 406 of providing and evaluating a test temperature value is repeated in a loop until the test temperature value exceeds the minimum temperature value. When it does, i.e. when the heater 15 is running, the method is restarted from the step 301 of operating the obturator 25 to the first position.
  • a timer is initiated by the step 404 of operating the obturator 25 to an intermediate position. If the timer reaches a timeout period of time, the method is restarted from the step 301 of operating the obturator 25 to the first position, regardless of if the test temperature value has exceeded the minimum temperature value.
  • the timeout period of time is preferably in a range of 5-90 minutes,.
  • the timer is set and controlled by the controller 22.
  • a step 407 of determining the difference between the first temperature value and the second temperature value is a step 407 of determining the difference between the first temperature value and the second temperature value. According to a following step 408, it is determined, by the controller 22, whether the difference exceeds a threshold temperature value.
  • steps 407 and 408 are provided in order to more accurately determine the connection of the mixing valve 10. A smaller difference provides a higher risk of inaccurate determination of the connection of the inlets of the mixing valve 10.
  • the threshold temperature value lies preferably in a range of 1-10°C, more preferably in a range of 3-6°C.
  • the method is restarted from the beginning, i.e. from the step 301 of operating the obturator 25 to the first position.
  • the method may further comprise that the period of times of steps 401 and 402 are extended if the method is restarted due to that the difference does not exceed the threshold temperature value.
  • the temperature sensor gets more time to thermally adjust to and measure on the output water corresponding to the present position of the obturator 25.
  • the provided temperature value may become more accurate.
  • step 407 of determining the difference and the step 305 of determining the mutual size relationship may be performed as one step and thus does not need to be performed separately.
  • the mixing valve 10 and the actuator 20 may be, but does not have to be, two separate elements.
  • the actuator 20 is removable connected to the mixing valve 10.
  • the actuator 20, including the temperature sensor 14, may be attached to and removed from the mixing valve 10.
  • the actuator 20 may be used during the installation of the mixing valve 10, and then be replaced by a permanent actuator.
  • the actuator 20 may be used as a diagnostic tool for determining the connections of a mixing valve 10 which has been previously installed.
  • the actuator 20 may alternatively be a replacement actuator for a present actuating device in a mixing valve 10.
  • a user may replace an e.g. old or mal-functioning actuator with the actuator 20 according to the present invention, in an already installed heating system.
  • the actuator 20 is illustrated in figure 5 .
  • the user interface is illustrated.
  • the connection which provides the connection between the actuator 20 and the mixing valve 10, is arranged on the opposite side of the actuator 20. Inside the actuator 20, the motor 21 and controller 22 are provided.
  • Visual indicators 50, 50' are provided for indicating the determined high temperature mode and low temperature mode, as previously disclosed.
  • the visual indicators 50, 50' are LEDs which each is set to a color depending on which temperature mode it indicates.

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Claims (15)

  1. Verfahren zum automatischen Bestimmen der Verbindung eines ersten Einlasses (11) und eines zweiten Einlasses (12) eines Mischventils (10) im Hinblick auf einen Niedrigtemperatur-Fluideinlass und einen Hochtemperatur-Fluideinlass, wobei das Mischventil ferner einen Auslass (13) und einen Obturator (25), der zum Einstellen des Mischventils zum Ermöglichen eines Fluidvolumenstroms zwischen den ersten und zweiten Einlässen und dem Auslass angeordnet ist, aufweist;
    wobei das Mischventil Teil eines Systems ist, das ferner Folgendes aufweist:
    einen Motor (21) zum Betätigen des Obturators;
    ein Steuergerät (22); und
    einen Temperatursensor (14), der zum Erfassen einer Temperatur des Fluids im Auslass oder stromabwärts des Auslasses des Mischventils angeordnet ist;
    wobei das Verfahren Folgendes aufweist:
    Betätigen (301), durch den Motor, des Obturators in eine erste Position, in der der zweite Einlass mehr geöffnet ist als der erste Einlass, wobei ein Fluidvolumenstrom zwischen mindestens dem zweiten Einlass und dem Auslass ermöglicht ist;
    Bereitstellen (302), durch den Temperatursensor, mindestens eines ersten Temperaturwerts an das Steuergerät;
    Betätigen (303), durch den Motor, des Obturators in eine zweite Position, in der der erste Einlass mehr geöffnet ist als der zweite Einlass, wobei ein Fluidvolumenstrom zwischen mindestens dem ersten Einlass und dem Auslass ermöglicht ist;
    Bereitstellen (304), durch den Temperatursensor, mindestens eines zweiten Temperaturwerts an das Steuergerät;
    Bestimmen (305), durch das Steuergerät, einer gegenseitigen Beziehung zwischen mindestens zwei der bereitgestellten Temperaturwerte; und
    Bestimmen (306), durch das Steuergerät und auf Basis der bestimmten gegenseitigen Beziehung, welcher des ersten Einlasses und des zweiten Einlasses mit dem Niedrigtemperatur-Fluideinlass beziehungsweise dem Hochtemperatur-Fluideinlass verbunden ist.
  2. Verfahren nach Anspruch 1, wobei der Schritt des Bestimmens der gegenseitigen Beziehung ein Bestimmen der gegenseitigen Größenbeziehung des ersten Temperaturwerts zum zweiten Temperaturwert umfasst.
  3. Verfahren nach Anspruch 1, wobei mehrere der ersten Temperaturwerte oder mehrere der zweiten Temperaturwerte bereitgestellt sind, wobei das Verfahren ferner ein Erzeugen einer Temperaturkurve über eine Messzeit auf Basis der bereitgestellten ersten oder zweiten Temperaturwerte umfasst, und wobei der Schritt des Bestimmens der gegenseitigen Beziehung ein Bestimmen eines Gradienten der erzeugten Temperaturkurve umfasst.
  4. Verfahren nach einem der Ansprüche 1 bis 3, ferner aufweisend zum Bestimmen ob ein Erhitzen des Fluids im Hochtemperatur-Fluideinlass im System aktiviert ist:
    Bestimmen (403), durch das Steuergerät, ob einer des ersten Temperaturwerts und des zweiten Temperaturwerts einen Mindesttemperaturwert überschreitet; und wenn der Mindesttemperaturwert nicht überschritten ist:
    Betätigen (404), durch den Motor, des Obturators in eine Zwischenposition, in der jeder des ersten Einlasses und des zweiten Einlasses mindestens teilweise geöffnet sind;
    Bereitstellen (405), durch den Temperatursensor, eines Testtemperaturwerts;
    Bestimmen (406), durch das Steuergerät, ob der Testtemperaturwert den Mindesttemperaturwert überschreitet;
    Neustart, wenn der Testtemperaturwert den Mindesttemperaturwert überschreitet, des Verfahrens ab dem Schritt des Betätigens des Obturators in die erste Position; und
    Neustart, wenn der Testtemperaturwert den Mindesttemperaturwert nicht überschreitet, des Verfahrens ab dem Schritt des Bereitstellens eines Testtemperaturwerts.
  5. Verfahren nach Anspruch 4, ferner aufweisend die folgenden Schritte:
    Auslösen eines Timers durch den Schritt des Betätigens des Obturators in die Zwischenposition; und
    Neustart, wenn der Timer eine Zeitablaufperiode erreicht, des Verfahrens ab dem Schritt des Betätigens des Obturators in die erste Position.
  6. Verfahren nach einem der vorhergehenden Ansprüche, ferner aufweisend:
    Bestimmen (407), durch das Steuergerät, der Differenz zwischen dem ersten Temperaturwert und den zweiten Temperaturwert; und, wenn die Differenz einen Temperatur-Schwellenwert nicht überschreitet,
    Neustart des Verfahrens ab dem Schritt des Betätigens des Obturators in die erste Position.
  7. Verfahren nach Anspruch 6, wobei der Temperatur-Schwellenwert in einem Bereich von 1-10 °C, bevorzugt in einem Bereich von 3-6 °C liegt.
  8. Verfahren nach einem der vorhergehenden Ansprüche, ferner aufweisend den folgenden Schritt:
    Warten (401, 402) während eines Zeitraums vor dem Bereitstellen eines Temperaturwerts vom Temperatursensor.
  9. Verfahren nach einem der vorhergehenden Ansprüche, ferner aufweisend:
    Anzeigen der Position von den ersten und zweiten Positionen, die dem niedrigeren Temperaturwert entspricht, als eine Niedrigtemperatur-Modus-Position; und
    Anzeigen der Position von den ersten und zweiten Positionen, die dem höheren Temperaturwert entspricht, als eine Hochtemperatur-Modus-Position.
  10. Verfahren nach einem der vorhergehenden Ansprüche, wobei die ersten und zweiten Positionen vorbestimmte Positionen sind; und wobei das Verfahren ferner Folgendes aufweist:
    Einstellen der ersten Position der vorbestimmten Positionen als die am nächsten einer gegenwärtigen Position des Betätigers liegende.
  11. Verfahren nach einem der vorhergehenden Ansprüche, wobei der erste Einlass geschlossen ist, wenn der Obturator in der ersten Position angeordnet ist, und wobei der zweite Einlass geschlossen ist, wenn der Obturator in der zweiten Position angeordnet ist.
  12. Verfahren nach einem der vorhergehenden Ansprüche, wobei der Motor ein Motor mit regelbarer Drehzahl ist.
  13. Betätiger (20) zum automatischen Bestimmen der Verbindung eines ersten Einlasses (11) und eines zweiten Einlasses (12) eines Mischventils (10) im Hinblick auf einen Niedrigtemperatur-Fluideinlass und einen Hochtemperatur-Fluideinlass, wobei das Mischventil ferner einen Auslass (13) und einen Obturator (25), der zum Einstellen des Mischventils zum Ermöglichen eines Fluidvolumenstroms zwischen den ersten und zweiten Einlässen und dem Auslass angeordnet ist, aufweist; wobei der Betätiger Folgendes aufweist:
    einen Motor (21) zum Betätigen des Obturators;
    einen Verbinder zum Verbinden des Motors mit dem Obturator;
    ein Steuergerät (22); und
    einen Temperatursensor (14), der zum Anordnen im Auslass oder stromabwärts des Auslasses des Mischventils angepasst ist;
    wobei der Motor angeordnet ist zum Betätigen des Obturators in eine erste Position, in der der zweite Einlass mehr geöffnet ist als der erste Einlass, wobei ein Fluidvolumenstrom zwischen mindestens dem zweiten Einlass und dem Auslass ermöglicht ist;
    wobei der Temperatursensor angeordnet ist zum Bereitstellen mindestens eines ersten Temperaturwerts an das Steuergerät;
    wobei der Motor ferner angeordnet ist zum Betätigen des Obturators in eine zweite Position, in der der erste Einlass mehr geöffnet ist als der zweite Einlass, wobei ein Fluidvolumenstrom zwischen mindestens dem ersten Einlass und dem Auslass ermöglicht ist;
    wobei der Temperatursensor ferner angeordnet ist zum Bereitstellen mindestens eines zweiten Temperaturwerts an das Steuergerät;
    wobei das Steuergerät zum Bestimmen einer gegenseitigen Beziehung zwischen mindestens zwei der bereitgestellten Temperaturwerte angeordnet ist; und
    wobei das Steuergerät ferner angeordnet ist zum Bestimmen, auf Basis der bestimmten gegenseitigen Beziehung, welcher des ersten Einlasses und des zweiten Einlasses mit dem Niedrigtemperatur-Fluideinlass beziehungsweise dem Hochtemperatur-Fluideinlass verbunden ist.
  14. Betätiger nach Anspruch 13, wobei der Betätiger für ein entfernbares Verbinden mit dem Obturator des Mischventils angeordnet ist.
  15. System zum Mischen von Fluiden, aufweisend:
    ein Mischventil (10), aufweisend einen ersten Einlass (11) und einen zweiten Einlass (12), die verbunden sind mit einem Niedrigtemperatur-Fluideinlass und einem Hochtemperatur-Fluideinlass, einem Auslass (13) und einem Obturator (25), der angeordnet ist zum Einstellen des Mischventils zum Ermöglichen eines Fluidvolumenstroms zwischen den ersten und zweiten Einlässen und dem Auslass angeordnet ist; und
    einen Betätiger (20) zum automatischen Bestimmen der Verbindung des ersten Einlasses und des zweiten Einlasses des Mischventils im Hinblick auf den Niedrigtemperatur-Fluideinlass und den Hochtemperatur-Fluideinlass, wobei de Betätiger Folgendes aufweist:
    einen Motor (21) zum Betätigen des Obturators;
    einen Verbinder zum Verbinden des Motors mit dem Obturator;
    ein Steuergerät (22); und
    einen Temperatursensor (14), der zum Anordnen im Auslass oder stromabwärts des Auslasses des Mischventils angepasst ist;
    wobei der Motor angeordnet ist zum Betätigen des Obturators in eine erste Position, in der der zweite Einlass mehr geöffnet ist als der erste Einlass, wobei ein Fluidvolumenstrom zwischen mindestens dem zweiten Einlass und dem Auslass ermöglicht ist;
    wobei der Temperatursensor angeordnet ist zum Bereitstellen mindestens eines ersten Temperaturwerts an das Steuergerät;
    wobei der Motor ferner angeordnet ist zum Betätigen des Obturators in eine zweite Position, in der der erste Einlass mehr geöffnet ist als der zweite Einlass, wobei ein Fluidvolumenstrom zwischen mindestens dem ersten Einlass und dem Auslass ermöglicht ist;
    wobei der Temperatursensor ferner angeordnet ist zum Bereitstellen mindestens eines zweiten Temperaturwerts an das Steuergerät;
    wobei das Steuergerät zum Bestimmen einer gegenseitigen Beziehung zwischen mindestens zwei der bereitgestellten Temperaturwerte angeordnet ist; und
    wobei das Steuergerät ferner angeordnet ist zum Bestimmen, auf Basis der bestimmten gegenseitigen Beziehung, welcher des ersten Einlasses und des zweiten Einlasses mit dem Niedrigtemperatur-Fluideinlass beziehungsweise dem Hochtemperatur-Fluideinlass verbunden ist.
EP12174271.2A 2012-06-29 2012-06-29 Verfahren zum Bestimmen der Verbindungen in einem Mischventil und Betätiger dafür Active EP2679918B1 (de)

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