EP3377770B1 - Pompe, système d'eau sanitaire, procédé de fonctionnement d'un système d'eau sanitaire et procédé d'autoapprentissage de la pompe dans le système d'eau sanitaire - Google Patents

Pompe, système d'eau sanitaire, procédé de fonctionnement d'un système d'eau sanitaire et procédé d'autoapprentissage de la pompe dans le système d'eau sanitaire Download PDF

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Publication number
EP3377770B1
EP3377770B1 EP16798445.9A EP16798445A EP3377770B1 EP 3377770 B1 EP3377770 B1 EP 3377770B1 EP 16798445 A EP16798445 A EP 16798445A EP 3377770 B1 EP3377770 B1 EP 3377770B1
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EP
European Patent Office
Prior art keywords
pump
hot water
delivery pump
delivery
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP16798445.9A
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German (de)
English (en)
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EP3377770A1 (fr
Inventor
Oliver Laing
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Xylem Europe GmbH
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Xylem Europe GmbH
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Publication of EP3377770A1 publication Critical patent/EP3377770A1/fr
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Classifications

    • 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
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • F04D15/0083—Protection against sudden pressure change, e.g. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • 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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0078—Recirculation systems

Definitions

  • the invention relates to a pump device for arrangement on a recirculation line of a domestic water system.
  • the invention further relates to a domestic hot water system, comprising a hot water supply device, a hot water line which is connected to the hot water supply device and at which at least one tap is arranged, and a recirculation line which is connected to the hot water line and leads to the hot water supply device.
  • the invention further relates to a method for operating a domestic water system, comprising a hot water supply device, a hot water line with at least one tap, and a recirculation line.
  • the invention further relates to a self-learning method for a feed pump of a domestic water system.
  • a circulation control which comprises a sensor for the detection of hot water dispensing processes and subsequent triggering of a circulation pump upon request.
  • a microcontroller or microcomputer is provided for signal processing and control of the circulation pump.
  • a cyclically circulating habits memory and triggering starts of the circulation pump when a threshold value is exceeded due to the stored probability of need.
  • the stored value of the currently valid time of day interval is the output variable of a low-pass function, the input variable of which is formed from the cyclically sampled test results of tapping operations in the relevant interval and their Time constant is variable and in principle different for recognized or unrecognized dispensing processes.
  • Detected tapping processes are temporarily stored in a further memory with a cyclical structure and are only processed during the next day period to specify the contents of the habits memory. If the sensor for the detection of dispensing processes is a temperature sensor, whenever the riser pipe is already heated, its cooling rate is compared with a reference value in order to detect a dispensing process under this condition.
  • a circulating pump for a conveying liquid comprising an electric motor, which is electronically commutated, with a rotor, a stator and a motor circuit, and a paddle wheel, which is non-rotatably connected to the rotor.
  • the electric motor has an evaluation device, by means of which a flow rate of conveyed liquid through the circulation pump can be determined via a speed of the rotor and / or a power consumption of the electric motor.
  • At least one signal output is provided, at which a flow rate signal and / or flow rate-dependent switching signal can be provided by the circulation pump.
  • the invention has for its object to provide a pump device of the type mentioned, with which a domestic water system can be operated in a simple and convenient manner.
  • a feed pump, a check valve, and a bypass line for the check valve are provided, the bypass line being arranged parallel to the check valve, and a combination of check valve and bypass line being arranged in series with the feed pump.
  • Warm water can be circulated in a recirculation process using the feed pump.
  • the check valve prevents water from flowing out of a hot water supply device at high speed against a delivery direction of the feed pump through the feed pump.
  • the bypass line ensures that a small amount of warm water can still flow back into the feed pump. This can lead to a temperature change and, in particular, a relatively steep temperature change, which is detectable. This change in temperature is an indication of water being drawn off.
  • water tapping on the process water system can be detected via "on-board means" of the pump device, regardless of whether the feed pump is in operation or not.
  • a user pattern can then be determined by the pump device according to the invention, which in turn can be used in a self-learning process for controlling / setting / adapting the operation of the feed pump. This allows the domestic water system to be set accordingly operate comfortably. With a learned user pattern, significant cooling of hot water in a hot water pipe of the domestic water system via recirculation can be prevented at times when hot water is usually drawn off.
  • the pump device has a first connection, which is (directly) fluidly connected to the combination of check valve and bypass line, and which serves to connect the pump device to a hot water supply device.
  • a first connection which is (directly) fluidly connected to the combination of check valve and bypass line, and which serves to connect the pump device to a hot water supply device.
  • water from the hot water supply device is coupled into the pump device via the first connection.
  • the pump device also has a second connection, which is (directly) connected to the feed pump in a fluid-effective manner, water as the feed liquid flowing through the pump device from the second connection to the first connection when the feed pump is operating. In a "recirculation mode" of the feed pump, this conveys water from the recirculation line, which is connected to the second connection, into the hot water supply device, which is connected to the first connection.
  • the check valve is arranged and designed such that when water is drawn off it closes on a hot water line on which the recirculation line is arranged. This prevents “extensive” mixing of water from the hot water supply device and water from the recirculation device. Water from the hot water supply device can then not through the delivery pump at high speed through this stream.
  • the pressure in the provision of hot water in comparison to the pressure difference of the delivery device is usually sufficient to close the check valve.
  • the check valve advantageously ensures a closure both when the pump is operating and when the feed pump is at a standstill.
  • bypass line is arranged and designed such that a throughput of delivery liquid takes place through it, which is at most 15% of a throughput of delivery liquid through the pump device, when the check valve is open and the delivery pump is in operation. As a result, the "malfunction" caused by the open bypass line is low.
  • the bypass line has a hydraulic cross-sectional area which lies in the range between 5% and 15% of a hydraulic cross-sectional area of the recirculation line on which the pump device is arranged.
  • the lower limit can be used to prevent lime deposits or deposits of dirt particles from clogging the bypass line over a normal operating period.
  • the upper limit ensures that the influence of the bypass line on normal recirculation operation is minimized.
  • the pump device comprises a sensor device and an evaluation device, which is connected to the sensor device in a signal-effective manner, by means of which it can be detected when water is drawn from a hot water line to which the recirculation line is connected. It can then be recognized by means of the evaluation device when such dispensing processes are present. From this in turn, a user pattern can be determined in terms of its time dependency.
  • the sensor device is integrated in the feed pump and in particular is arranged within a housing of the feed pump. This results in a minimal amount of circuitry and there is no need for it Lines are routed to the domestic water system for a sensor device.
  • the evaluation device is integrated in the feed pump and is in particular arranged within a housing of the feed pump, and in particular is arranged on a carrier which is a carrier for a motor circuit of an electric motor of the feed pump or with such a Carrier is connected. This results in an optimized integration.
  • the evaluation device is part of the motor circuit or is identical to it.
  • the sensor device is arranged and designed and the evaluation device is designed such that the water tap can be detected both when the feed pump is running and when the feed pump is stopped. This allows a user pattern to be determined in a safe manner. This in turn enables safe and convenient operation.
  • the sensor device is arranged and designed and the evaluation device is designed such that, when the feed pump is running, a change in the flow rate of feed liquid through the feed pump and / or from the absolute flow rate can detect the water tapping.
  • a flow rate and in particular a change in the flow rate can be determined in a simple manner. This makes it easy to identify a water tap when the feed pump is operating.
  • the sensor device comprises a sensor for determining a speed of a rotor of an electric motor of the feed pump and / or a sensor for determining a power consumption of the electric motor
  • the evaluation device determines the flow rate from the speed and power consumption of the electric motor. For example, the speed is specified and the power consumption is measured or the Power consumption is specified and the speed is measured. This can then be determined on the basis of the known dependence of the flow rate on speed and power. In particular, a change can easily be determined.
  • the evaluation device continuously monitors the flow rate in order to be able to recognize a tap in time.
  • the sensor device has at least one temperature sensor, which is arranged in particular within the feed pump. Strong temperature changes can be identified via the temperature sensor, which can be attributed to a backflow of water from a hot water supply device into the feed pump. This allows water to be drawn off even when the feed pump is not in operation. For this detectability, no sensor (such as a temperature sensor) has to be provided outside the pump device.
  • the evaluation device monitors temperature signals provided by the at least one temperature sensor and, in particular in the event of a (specific) temperature change, provides a detection signal which indicates a backflow of water from the hot water supply device through the bypass line into the feed pump, in particular when the feed pump is not in operation.
  • This particular temperature change is in particular a rapid temperature change, which is due to the fact that water has flowed from the hot water supply device into the feed pump via the bypass line.
  • a self-learning device which provides control signals for operating the feed pump on the basis of a user pattern, which is determined via the sensor device and the evaluation device.
  • the evaluation device can provide data about a water tap. In principle, this data can be determined in a time-resolved manner.
  • the self-learning device can then determine a user pattern.
  • the feed pump can in turn be operated in such a way that there is optimized comfort for operating a domestic water system. For example, a recirculation is carried out for a certain period of time before an expected tap in order to "remove" excessively cooled water from a hot water pipe.
  • the self-learning device is coupled to the evaluation device.
  • the self-learning device and the evaluation device are arranged in the same microcontroller in which a motor circuit of an electric motor of the feed pump is also arranged.
  • the self-learning device comprises a timer which determines a point in time of a water tap and stores corresponding points in time, with control and / or setting and / or adaptation of an operation of the feed pump taking place according to stored points in time. This enables a time-resolved user pattern to be determined. This allows a time control for the operation of the feed pump to be carried out.
  • a process water system of the type mentioned in the introduction in which a pump device according to the invention is arranged on the recirculation line.
  • a method for operating a domestic water system of the type mentioned at the outset is also provided, a pump device according to the invention being arranged on the recirculation line.
  • a tap of water from the hot water pipe is detected while the feed pump is running by determining a flow of the conveying liquid through the feed pump, and a tap of water from the hot water pipe when the feed pump is at a standstill is detected from measured temperature changes at the feed pump.
  • a user pattern can be determined by the method according to the invention without an external sensor having to be provided.
  • the method according to the invention has the advantages already explained in connection with the pump device according to the invention.
  • temperature changes on the feed pump which are used for the detection of a draw-off of water from the hot water pipe and are measured in particular within the feed pump, are brought about by water which flows from the hot water supply device through the bypass pipe into the feed pump. When the feed pump is not operating, it can then be recognized whether water is being drawn off.
  • the feed pump is put into operation when temperature changes are detected when the feed pump is stopped. This makes it possible to verify, for example, by detecting a flow rate whether a tap has taken place.
  • a self-learning method of the type mentioned at the outset in which a user pattern relating to water tapping is determined using the method according to the invention for operating a domestic water system, and pump operation of the feed pump is controlled and / or set and / or adjusted based on the determined pattern.
  • a user pattern can be recognized in a safe and comfortable manner, which in turn can be used to control the operation of the domestic water system. This results in comfortable operation.
  • times of the water tap are stored during the pattern determination and a pumping operation is initiated at a time interval before a corresponding stored time and / or a pumping operation is ended at a time interval after a corresponding stored time. This results in comfortable operation.
  • a determined pattern has a finite lifespan and is deactivated for a certain period of time with regard to the operation of the feed pump, in particular after the pattern has not been used. This ensures that a rare user pattern is used too often.
  • An embodiment of a domestic water system according to the invention which in Figure 1 shown and schematically designated 10, comprises a hot water supply device 12. This has in particular a hot water tank 14, which stores warm water.
  • a boiler 16 is assigned to the hot water tank 14.
  • the hot water supply device 12 has a supply device 18 for fresh water (cold water), via which heatable fresh water can be supplied.
  • a hot water line 20 is connected to the hot water supply device 12, by means of which hot water can be removed from the hot water tank 14.
  • Tap points 22a, 22b, 22c are connected to the hot water line 20.
  • the taps include, for example, one or more taps and one or more shower heads. Hot water can be taken from them.
  • a recirculation line 24 is connected to the hot water line 20.
  • the recirculation line is a continuation of the hot water line 20 after the last tap 22c.
  • the recirculation line 24 leads to the hot water supply device 12 and is connected to the hot water tank 14.
  • Warm water can be circulated between a first connection 26 and a second connection 28 of the hot water supply device 12 via the recirculation line 24 when tapping points 22a etc. are not being tapped.
  • the hot water line 20 is connected to the hot water supply device 12 via the first connection 26.
  • the recirculation line 24 is connected to the hot water supply device 12 via the second connection 28.
  • a pump device 30 is provided to convey hot water in the recirculation line 24. This pump device 30 is arranged on the recirculation line 24. Pumped liquid 30, namely warm water, is conveyed between the first connection 26 and the second connection 28 by means of the pump device 30.
  • the pump device 30 comprises a feed pump 116.
  • the pump device 30 also has a check valve 32 and a bypass line 34.
  • the bypass line 34 is arranged parallel to the check valve 32.
  • the check valve can be "bridged", ie bypassed, via them.
  • the bypass line 34 can be composed of one line section or of several line sections.
  • the bypass line 34 and the check valve 32 form a combination 36.
  • This combination 36 is arranged in series with the feed pump 116.
  • the pump device 30 comprises a first connection 38 and a second connection 40.
  • the combination 36 is directly fluidly connected to the hot water supply device 12 via the first connection 38 and is fluidly connected to the second connection 28 thereof.
  • the feed pump 116 is connected to the recirculation line 24 via the second connection 40.
  • conveying liquid (water) flows from the second connection 40 to the first connection 38 into the hot water tank 14.
  • feed pump 116 (circulation pump) is, for example, from the DE 10 2007 054 313 A1 or the US 2009/0121034 known. Reference is expressly made to these documents in full.
  • the pump 116 ( Figure 2 ) comprises an electric motor 120 with a stator 122 and a rotor 124.
  • the electric motor 120 has a motor housing 126, in which the stator 122 and the rotor 124 are arranged.
  • the electric motor 120 also has a motor circuit 128.
  • the motor circuit 128 is arranged in a circuit housing 130.
  • the circuit housing 130 can, as in FIG Figure 2 shown, be separate from the motor housing 126 or be formed by means of the motor housing 126.
  • the rotor 124 is supported via a bearing shell 132 on a convex bearing body 134, which is designed in particular as a bearing ball, for example made of a ceramic material.
  • a spherical bearing is formed over the bearing body 134 and the bearing shell 132.
  • An impeller 136 is rotatably connected to the rotor 124.
  • the impeller 136 rotates about a rotation axis 138 in a delivery chamber 140.
  • the delivery chamber 140 can be flowed through by the conveying liquid, the flow being driven by the impeller 136 in pump operation.
  • the feed pump 116 includes a temperature sensor 142.
  • the temperature sensor 142 is arranged and designed such that it can be used to determine a temperature of the conveyed liquid in the conveying space 140.
  • the temperature sensor 142 is preferably located outside the delivery chamber 140. As a result, the temperature sensor 142 can be of simpler design since it is not exposed to liquid.
  • the conveying space 140 is delimited by a wall 144.
  • the temperature sensor 142 is located on the wall 144 outside the delivery space 140. It is seated, for example, directly on an outside of the wall 144 or at a small distance from this outside. In particular, it is in thermal contact with the wall 144.
  • the temperature sensor sits on the motor housing 126 and is in thermal contact with the delivery chamber 140.
  • the pump device 30 has an evaluation device 42, which is integrated in particular into the feed pump 116.
  • the temperature sensor 142 or 146 makes its temperature signals available to the evaluation device 148.
  • the evaluation device 42 is integrated in the motor circuit 128, for example.
  • the feed pump 116 has a housing 150.
  • the housing 150 is in particular thermally insulated.
  • the impeller 36 is arranged within the housing 150.
  • the electric motor 20 is at least partially arranged within the housing 150.
  • the temperature sensor 142 or 146 is arranged within the housing 150.
  • the housing 150 has a pump housing 151 as the first housing part and the motor housing 126 as the second housing part.
  • the motor housing 126 is seated on the pump housing 151.
  • the impeller 136 is positioned in the pump housing 151.
  • the temperature sensor 142 is located in the housing 150 and in particular in the motor housing 126 or, for example, on the outside of the pump housing 151.
  • the temperature sensor 146 is also located in the motor housing 126.
  • the temperature sensor 146 is used for easy removal of the electric motor 120 from the pump housing 151. In this case, no cable connections for the temperature sensor need to run in the pump housing 151.
  • the temperature sensor (for example the temperature sensor 142) is assigned a temperature control device.
  • the temperature control device ensures that there are defined temperature conditions in an environment of the temperature sensor 142. As a result, changes in temperature over time can be directly associated with temperature changes in the conveyed liquid in the conveying space 140.
  • the temperature control device comprises a temperature control chamber.
  • This has a housing in particular made of a thermally insulating material.
  • the temperature sensor 142 (or 146) is then arranged in the housing and is in thermal contact with the delivery chamber 140.
  • it is arranged directly on the wall 144 or it is a thermal conduction connection between the wall 144 and the temperature sensor 142 or 146 and provided the housing.
  • the temperature control device comprises at least one heating element and in particular resistance heating element, which is arranged in the temperature control chamber.
  • a defined temperature can be set in the temperature control chamber and thus in the vicinity of the temperature sensor 142 or 146 by appropriate electrical application of the heating element.
  • the evaluation device 42 is on a carrier 44 ( Figure 7 ) arranged.
  • the carrier 44 is positioned in particular in the circuit housing 130.
  • the motor circuit 128, which controls the electric motor 120, is arranged on the same carrier 44 or on a carrier connected to the carrier 44.
  • the temperature sensor 142, 146 is connected in a signal-effective manner to the evaluation device 42, that is to say the corresponding temperature signals are made available to the evaluation device 42, which monitors the temperature signals.
  • a sensor device is formed via the temperature sensor 142 or the temperature sensor 146 (possibly in combination with the temperature control device), via which a water tap on the hot water line 20 can be detected when the feed pump 116 is stopped.
  • a sensor device 46 is also provided ( Figure 7 ), which determines the speed n of the rotor 124 of the electric motor 120 and / or determines the power consumption P of the electric motor 120. This is explained in more detail below.
  • the sensor device 46 is integrated in particular in the electric motor 120 and, for example, integrated in the motor circuit 128.
  • the sensor device 46 is also connected to the evaluation device 42 in a signal-effective manner.
  • a self-learning device 48 is also positioned on the carrier 44.
  • the evaluation device 42 evaluates corresponding sensor data of the sensor device 46 and the temperature sensor 142 or 146.
  • the self-learning device 48 can generate a user pattern for the use of hot water from the corresponding evaluated data, which is recorded in particular as a function of time.
  • the self-learning device 48 includes a Timer 50, by means of which the times of the hot water tap on the hot water line 20 can be determined.
  • the self-learning device 48 in turn generates data for the motor circuit 128 for controlling the electric motor 120 and thus the feed pump 116.
  • the self-learning device 48 can be integrated in the motor circuit 128.
  • a microcontroller of the motor circuit 128 also includes the evaluation device 42 and the self-learning device 48.
  • the bypass line preferably has a hydraulic cross section which is smaller than the hydraulic cross section of recirculation line 24.
  • the hydraulic cross section of bypass line 34 is in the range between 5% and 15% of the hydraulic cross section of recirculation line 24. In one exemplary embodiment the hydraulic cross section of the bypass line 34 is approximately 10% of the hydraulic cross section of the recirculation line 24.
  • the cross-section of the bypass line 34 is selected such that it is sufficiently large that there is no blockage due to limescale or dirt particles and, on the other hand, is selected so small that the amount of water flowing through the bypass line 34 to a tap is so small that the Water temperature at the tap is not noticeably affected. (The corresponding backflow of water can possibly consist of cold water.)
  • the check valve 32 is arranged and designed such that the feed pump 116 is protected against a backflow of water (hot water) from the hot water supply device 12 and water from the Water tank 14 can mix on the recirculation line 24 with water from the hot water line 20.
  • bypass line 34 allows a certain amount of backflow for measurement reasons, as will be explained in more detail below.
  • this backflow is limited by the correspondingly small hydraulic diameter of the bypass line 34 and is kept “small”.
  • bypass line 34 limits the backflow for a throughput of conveyed liquid, which is at most 15% of a throughput of conveyed liquid through the pump device 30 in normal recirculation operation when conveyed liquid is conveyed from the second connection 40 to the first connection 38.
  • the pump device 30 conveys a certain amount of hot water through the hot water line 20 and the recirculation line 24. Hot water is circulated from the hot water supply device 12 through the hot water line 20, the recirculation line 24 leading to the hot water tank 14 leads, closes the funding group.
  • the feed pump 116 provides water delivery. This "normal operation” is in Figure 3 shown. In this normal operation, the check valve 32 is open (in Figure 3 indicated by "O"). A direction of flow of hot water is indicated by double arrows.
  • the recirculation of hot water can take place continuously during times in which hot water is expected to be drawn off, or it can, for example, be clocked.
  • the recirculation of hot water through the hot water line 20 and the recirculation line 24 can take place in particular in dependence on a specific user pattern in order to achieve an energy-saving operation enable. For example, there is no need for hot water circulation in longer periods of rest.
  • the user pattern can in turn be determined via the evaluation device 42 and the self-learning device 48 can be used to provide the motor circuit 128 with corresponding data for controlling and / or setting and / or adapting the operation of the feed pump 116.
  • the dynamic pressure at the feed pump 116 is 1 m in relation to a delivery head.
  • the static pressure in the domestic water system 10 is of the order of magnitude in relation to a delivery head in the range between 30 m and 50 m, so that the check valve 32 closes in a safe manner by tapping water on the hot water line 20.
  • elements of the pump device 30 can be used to detect a water tap on the hot water line 20, both when the feed pump 116 is in operation and when the feed pump 116 is not in operation.
  • the flow rate Q is proportional to the third root of a motor power P of the electric motor 120; the motor power P is the power consumption of the electric motor 120.
  • the flow rate Q is also proportional to the speed n of the electric motor 120, that is to say the speed n of the impeller 136 of the feed pump 116, which in turn corresponds to the speed of the rotor 124 of the electric motor 120.
  • the measurable engine power P can then be used to determine the flow rate Q.
  • the pump curve is given by a linear relationship ( Figure 5 ).
  • the corresponding relationship is determined once and stored in a memory of the evaluation device 42.
  • Corresponding calibration data are thus provided, which are stored in the delivery pump 116 at the factory.
  • engine power P is determined by sensor device 46. It will then be in the in the Evaluation device 42 "looked up" stored table and thus concluded on the current (current) flow rate Q.
  • the evaluation device 42 receives data from the sensor device 46 and monitors it.
  • the evaluation device 42 monitors in particular the absolute value of the flow rate or checks whether there is a change in the flow rate Q, in particular above a threshold. A corresponding significant change then means a tap on the hot water line 20.
  • the method just described can be used to determine whether (and with the help of the timer 50 when) water is being drawn from the hot water line 20 if the feed pump 116 is in operation, that is to say based on the “recirculation state” Figure 3 ,
  • Figure 5 schematically shows a pump curve for the feed pump 116, which indicates a delivery head H as a function of the flow rate Q.
  • a constant speed n is assumed.
  • the power consumption P (motor power) is also shown.
  • the corresponding data apply to a high-efficiency pump.
  • the power consumption P increases with increasing delivery quantity Q (curve 52).
  • two points are drawn schematically; the point B corresponds to a state in which the check valve 32 is open.
  • Point A corresponds to a low flow rate condition in which the check valve 32 is closed. It should be noted that it can be assumed that when hot water is drawn from the hot water pipe 20 running feed pump 116 this will usually no longer have a positive throughput, but a small negative throughput.
  • the water supply usually provides a pressure which is 30 to 50 times higher than the differential pressure of the feed pump 116. It can therefore be assumed that at point A the power consumption P is actually lower than in Figure 5 indicated.
  • the relationship between the power consumption and the delivery rate (flow rate) can be seen, and a tap on the hot water line 20 can be recognized via the delivery pump 116 (via the evaluation device 42 and the sensor device 46) while the delivery pump 116 is running.
  • Feed pumps 116 are usually operated in a circulation system in a speed-controlled manner since the power range is relatively low.
  • FIG 6 schematically shows a possible time profile of the temperature T, which is measured, for example, on the sensor 142.
  • the curve 54 according to Figure 6 corresponds to a temperature profile when the feed pump 116 is in operation.
  • the feed pump sucks hot water from the hot water tank 14 into the hot water pipe 20, which is thereby heated. Your circulation line 24 is also heated.
  • the water reaching the feed pump 116 becomes warmer with increasing time until the entire line (hot water line 20, recirculation line 24) is warm and the temperature no longer rises.
  • the feed pump 116 is thus flowed through by water, since it had previously delivered itself in the opposite direction.
  • An inverted profile 56 then arises for the temperature profile, the slope generally being flatter than in curve 54.
  • This water then flows out of the hot water tank 14 through the bypass line 34 in the feed pump 116.
  • the temperature and also the temperature changes depend on the position of a circulation input and in particular also on the state of charge of a boiler of the hot water supply device 12. If, for example, a shower has just been taken extensively, then it may be the case that a lower region of the hot water tank 14 is cold and first has to be warmed up again. If the hot water tank 14 is fully charged, then warm water can be provided from it again.
  • the temperature sensor 142, 146 supplies its data to the evaluation device 42, which determines the corresponding temporal temperature profile.
  • a strong temperature change is detected by the evaluation device 42, in particular according to curves 58 or 60, then this is an indication that a water tap has taken place or has taken place. It can then be recognized accordingly by monitoring temperature changes by the evaluation device 42 whether water has been drawn off. This water tap can also be detected when the feed pump 116 is not in operation.
  • the lower temperature change 56 compared to the temperature changes 58, 60 can also be detected.
  • a temperature profile according to profile 56 is an indication of a tap.
  • a water supply is thus recognized by means of "on-board means" of the feed pump 116 when the feed pump 116 is in operation and when it is not in operation.
  • the water tap is recognized in particular by a change in the flow rate Q.
  • water tapping is detected due to a possible backflow of water from the hot water tank 14 through the bypass line 34 into the feed pump 116 due to relatively large temperature changes.
  • the pump device 30 with the integrated sensor device with the temperature sensor 142, 146 and the sensor device 46 can then be used to determine whether a water tap is present or not, regardless of the operating state of the feed pump 16. No sensors outside the pump device 30 are required for this. In particular, no temperature sensor is required on the hot water supply device 12. This eliminates the otherwise required cabling and wiring.
  • the evaluation device 42 can therefore detect when there is a water tap on the hot water line 20, regardless of the operating state of the feed pump 116.
  • the timing element 50 can then be used to determine when such a water tap is present.
  • the self-learning device 48 can thereby determine a user pattern which is a time dependency of the water tap.
  • the user pattern determined in this way can in turn be used to control, adjust or adapt the operation of the feed pump 116.
  • the determined user pattern is used in such a way that the feed pump is operated in particular at a certain time interval (such as 15 minutes) before an expected tapping time in order to carry out a recirculation. If a user then carries out a tap, then he constantly receives warm water, that is to say there is no cooled water in the hot water line 20.
  • the operation of the feed pump 116 can be switched off after a certain period of time (such as 15 minutes) after an expected tapping interval, since no more recirculation is required.
  • the self-learning device 48 generates control data for the motor circuit 128 from the user pattern in order to control, adjust or adapt the feed pump 116 in a time-controlled manner.
  • the self-learning device 48 provides, for example, a control algorithm which has a 24-hour pattern and a superimposed 7-day pattern. As a result, a user pattern can be determined over the entire course of the week and used in accordance with this determined user pattern for controlling / setting / adapting the feed pump 116.
  • a self-learning device 48 assigns a finite lifetime to a user pattern. If no use of this user pattern is detected, then this user pattern is deactivated with regard to the control / setting / adaptation of the feed pump 116. If, for example, the user pattern is not used for three cycles, such deactivation takes place. For example, if the user pattern is used again within three days, it is reactivated. For example, the lifespan is extended to a maximum of 30 days, for example.
  • the corresponding lifespan control can also be used for the seven-day pattern.
  • user patterns can be different for each day and, for example, regular patterns for five days of the week may appear after some time, with days six and seven following other user patterns.
  • cycle lifetimes and the length of operations of the feed pump 116 can be selected in order to be able to vary a "comfort factor".
  • the longer life cycles and the longer a pump is in operation the less hot water is conveyed into the hot water pipe 20 without recirculation; however, the energy consumption is also higher.
  • the feed pump 116 is started as soon as a temperature change according to curve 58 or 60 is detected, which is due to the backflow of water into the feed pump 116.
  • a temperature change according to profile 56 can also be detected and is a sign of a tap. It can then be verified that actually (after detection of a finite Flow rate in pump operation) water from the hot water tank 14 has reached the feed pump 116 directly via the second connection 28.
  • the feed pump 116 can also be operated until the tap is stopped to determine the length of the hot water tap.
  • the self-learning device 48 can take the results obtained thereby into account in the user pattern.
  • the thermally insulated housing 150 enables a defined detection of the strong temperature changes (curves 58 or 60) due to the backflow of hot water from the hot water tank 14 via the second connection 28 into the feed pump 116.
  • the solution according to the invention enables a self-learning method to be implemented in which a user pattern can be detected by means of the pump device 30.
  • the user pattern can be detected regardless of whether the feed pump 116 is in operation or not.
  • a comfortable and energy-saving mode of operation results.
  • a user pattern can be detected and then also used without external sensors being provided with respect to the pump device 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (25)

  1. Arrangement de pompage destiné à être disposé sur une conduite de recirculation (24) d'un système d'eau sanitaire (10), comprenant une pompe de circulation (116), un clapet anti-retour (32) et une conduite de dérivation (34) pour le clapet anti-retour (32), la conduite de dérivation (34) étant disposée parallèlement au clapet anti-retour (32) et une combinaison (36) du clapet anti-retour (32) et de la conduite de dérivation (34) étant disposée en série avec la pompe de circulation (116), pour lequel l'arrangement de pompage possède un premier raccord (38) qui est relié fluidiquement à la combinaison (36) du clapet anti-retour (32) et de la conduite de dérivation (34) et qui sert au raccordement de l'arrangement de pompage (116) à un dispositif de préparation d'eau chaude (12), et l'arrangement de pompage possède un deuxième raccord (40) qui est relié fluidiquement à la pompe de circulation (116), l'eau en tant que liquide transporté traversant l'arrangement de pompage (30) du deuxième raccord (40) vers le premier raccord (38) lors du fonctionnement de la pompe de circulation (116).
  2. Arrangement de pompage selon la revendication 1, caractérisé en ce que le clapet anti-retour (32) est disposé et configuré de telle sorte qu'il se ferme lors d'un soutirage d'eau au niveau d'une conduite d'eau chaude (20) au niveau de laquelle est disposée la conduite de recirculation (24).
  3. Arrangement de pompage selon l'une des revendications précédentes, caractérisé en ce que la conduite de dérivation (34) est disposée et configurée de telle sorte qu'un débit du liquide transporté a lieu à travers elle, lequel est égal au maximum à 15 % d'un débit du liquide transporté à travers l'arrangement de pompage (30) lorsque le clapet anti-retour (32) est ouvert et la pompe de circulation (116) est en fonctionnement.
  4. Arrangement de pompage selon l'une des revendications précédentes, caractérisé en ce que la conduite de dérivation (34) possède une surface de section transversale hydraulique qui est comprise dans la plage entre 5 % et 15 % d'une surface de section transversale hydraulique de la conduite de recirculation (24) au niveau de laquelle peut être disposé l'arrangement de pompage (30).
  5. Arrangement de pompage selon l'une des revendications précédentes, caractérisé en ce que l'arrangement de pompage (30) comporte un dispositif de détection (142 ; 146 ; 46) et un dispositif d'interprétation (42) qui est relié de manière signalétique au dispositif de détection (142 ; 146 ; 46), par lequel il est possible de détecter lorsque de l'eau est soutirée d'une conduite d'eau chaude (20) à laquelle est raccordée la conduite de recirculation (24).
  6. Arrangement de pompage selon la revendication 5, caractérisé en ce que le dispositif de détection (142 ; 146 ; 46) est intégré dans la pompe de circulation (116) et notamment disposé à l'intérieur d'un carter (150) de la pompe de circulation (116).
  7. Arrangement de pompage selon la revendication 5 ou 6, caractérisé en ce que le dispositif d'interprétation (42) est intégré dans la pompe de circulation (116) et notamment disposé à l'intérieur d'un carter (150) de la pompe de circulation (116), et notamment disposé au niveau d'un élément porteur (44), lequel est un élément porteur (44) pour un circuit de moteur (128) d'un moteur électrique (120) de la pompe de circulation (116) ou est relié à un tel élément porteur (44).
  8. Arrangement de pompage selon l'une des revendications 5 à 7, caractérisé en ce que le dispositif de détection (142 ; 146 ; 46) est disposé et configuré de telle sorte et le dispositif d'interprétation (42) est configuré de telle sorte que le soutirage d'eau peut être détecté à la fois lorsque la pompe de circulation (116) est en fonctionnement et lorsque la pompe de circulation (116) est à l'arrêt.
  9. Arrangement de pompage selon l'une des revendications 5 à 8, caractérisé en ce que le dispositif de détection (46) est disposé et configuré de telle sorte et le dispositif d'interprétation (42) est configuré de telle sorte que lorsque la pompe de circulation (116) est en fonctionnement, le soutirage d'eau peut être détecté à partir d'une variation du débit (Q) de liquide transporté à travers la pompe de circulation (116) et/ou à partir du débit (Q) absolu.
  10. Arrangement de pompage selon la revendication 9, caractérisé en ce que le dispositif de détection (46) comporte un capteur destiné à déterminer une vitesse de rotation (n) d'un rotor (124) d'un moteur électrique (120) de la pompe de circulation (116) et/ou un capteur destiné à déterminer une puissance absorbée (P) du moteur électrique (120), et en ce que le dispositif d'interprétation (42) détermine le débit (Q) à partir de la vitesse de rotation (n) et de la puissance absorbée (P) du moteur électrique (120).
  11. Arrangement de pompage selon l'une des revendications 5 à 10, caractérisé en ce que le dispositif de détection possède au moins un capteur de température (142 ; 146) qui est notamment disposé à l'intérieur de la pompe de circulation (116).
  12. Arrangement de pompage selon la revendication 11, caractérisé en ce que le dispositif d'interprétation (42) surveille les signaux de température fournis par l'au moins un capteur de température (142 ; 146) et délivre un signal de détection, notamment dans le cas d'une variation de température, lequel indique un reflux d'eau depuis le dispositif de préparation d'eau chaude (12) dans la pompe de circulation (116) à travers le clapet anti-retour (34), notamment lorsque la pompe de circulation (116) n'est pas en fonctionnement.
  13. Arrangement de pompage selon la revendication 12, caractérisé en ce que le dispositif d'interprétation (42) génère un signal de mise en marche pour la pompe de circulation (116) lors de la génération du signal de détection.
  14. Arrangement de pompage selon l'une des revendications 5 à 13, caractérisé par un dispositif d'auto-apprentissage (48) qui fournit des signaux de commande pour un fonctionnement de la pompe de circulation (116) sur la base d'un modèle d'utilisateur qui est déterminé par le biais du dispositif de détection (142 ; 146 ; 46) et du dispositif d'interprétation (42).
  15. Arrangement de pompage selon la revendication 14, caractérisé en ce que le dispositif d'auto-apprentissage (48) est connecté au dispositif d'interprétation (42).
  16. Arrangement de pompage selon la revendication 14 ou 15, caractérisé en ce que le dispositif d'auto-apprentissage (48) comprend un temporisateur (50) qui détermine un instant d'un soutirage d'eau et mémorise des instants correspondants, une commande et/ou un réglage et/ou une adaptation d'un fonctionnement de la pompe de circulation (116) s'effectuant conformément aux instants mémorisés.
  17. Arrangement de pompage selon la revendication 16, caractérisé en ce qu'une mise en service de la pompe de circulation (116) s'effectue dans un intervalle de temps et notamment un intervalle de temps défini avant les instants mémorisés et/ou en ce qu'une terminaison d'un fonctionnement de la pompe de circulation (116) s'effectue après un intervalle de temps et notamment un intervalle de temps défini par rapport aux instants mémorisés.
  18. Arrangement de pompage selon l'une des revendications précédentes, caractérisé en ce que la pompe de circulation (116) possède un carter (150) isolé thermiquement.
  19. Système d'eau sanitaire, comprenant un dispositif de préparation d'eau chaude (12), une conduite d'eau chaude (20) qui est raccordée au dispositif de préparation d'eau chaude (12) et au niveau de laquelle est disposé au moins un point de soutirage (22a), et une conduite de recirculation (24) qui est raccordée à la conduite d'eau chaude (20) et mène au dispositif de préparation d'eau chaude (12), caractérisé en ce qu'un arrangement de pompage (30) selon l'une des revendications précédentes est disposé au niveau de la conduite de recirculation (24), l'arrangement de pompage (30) étant raccordé par le premier raccord (38) au dispositif de préparation d'eau chaude (12).
  20. Procédé pour faire fonctionner un système d'eau sanitaire (12), comprenant un dispositif de préparation d'eau chaude (12), une conduite d'eau chaude (20) comprenant au moins un point de soutirage (22a) et une conduite de recirculation (24), caractérisé en ce qu'un arrangement de pompage (30) selon l'une des revendications 1 à 18 est disposé au niveau de la conduite de recirculation, l'arrangement de pompage (30) étant raccordé par le premier raccord (38) au dispositif de préparation d'eau chaude (12), un soutirage d'eau depuis la conduite d'eau chaude (20) lorsque la pompe de circulation (116) est en fonctionnement étant détecté par le biais d'une détermination d'un débit de liquide transporté à travers la pompe de circulation (116), et un soutirage d'eau depuis la conduite d'eau chaude (20) lorsque la pompe de circulation (116) est à l'arrêt étant détecté à partir des variations de température mesurées au niveau de la pompe de circulation (116), les variations de température au niveau de la pompe de circulation (116) et notamment à l'intérieur de la pompe de circulation (116) étant notamment provoquées par de l'eau qui s'écoule du dispositif de préparation d'eau chaude (12) dans la pompe de circulation (116) à travers la conduite de dérivation (34).
  21. Procédé selon la revendication 20, caractérisé en ce que lors de la détection de variations de température lorsque la pompe de circulation (116) est à l'arrêt, la pompe de circulation (116) est mise en service.
  22. Procédé d'auto-apprentissage pour une pompe de circulation d'un système d'eau sanitaire, pour lequel est déterminé un modèle d'utilisateur concernant le soutirage d'eau avec le procédé selon l'une des revendications 20 ou 21 et un fonctionnement de pompe de la pompe de circulation (116) est commandé et/ou réglé et/ou adapté en se basant sur le modèle déterminé.
  23. Procédé d'auto-apprentissage selon la revendication 22, caractérisé en ce que lors de la détermination du modèle, des instants du soutirage d'eau sont mémorisés et un fonctionnement de la pompe est initié dans un intervalle de temps avant un instant mémorisé correspondant et/ou un fonctionnement de la pompe est terminé dans un intervalle de temps après un instant mémorisé correspondant.
  24. Procédé d'auto-apprentissage selon la revendication 22 ou 23, caractérisé en ce qu'un modèle déterminé possède une durée de vie finie et est notamment désactivé concernant le fonctionnement de pompe de la pompe de circulation (116) après une absence d'utilisation du modèle pendant une durée définie.
  25. Procédé d'auto-apprentissage selon l'une des revendications 22 à 24, caractérisé en ce que le modèle possède une part de n heures et une part superposée de m jours, avec notamment n = 24 et notamment m = 7.
EP16798445.9A 2015-11-17 2016-11-14 Pompe, système d'eau sanitaire, procédé de fonctionnement d'un système d'eau sanitaire et procédé d'autoapprentissage de la pompe dans le système d'eau sanitaire Active EP3377770B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015119883.5A DE102015119883A1 (de) 2015-11-17 2015-11-17 Pumpenvorrichtung, Brauchwassersystem, Verfahren zum Betreiben eines Brauchwassersystems und Selbstlernverfahren für eine Förderpumpe eines Brauchwassersystems
PCT/EP2016/077579 WO2017085015A1 (fr) 2015-11-17 2016-11-14 Système de pompes, système d'eau industrielle, procédé de fonctionnement d'un système d'eau industrielle et procédé d'auto-apprentissage concernant une pompe de refoulement d'un système d'eau industrielle

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EP3377770A1 EP3377770A1 (fr) 2018-09-26
EP3377770B1 true EP3377770B1 (fr) 2020-01-08

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IT202000015106A1 (it) * 2020-06-23 2021-12-23 Francesco Zambaldi Sistema di circolazione di acqua calda, particolarmente per uso sanitario e suo procedimento di installazione

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US11221149B2 (en) 2022-01-11
DE102015119883A1 (de) 2017-05-18
CN108291551A (zh) 2018-07-17
EP3377770A1 (fr) 2018-09-26
US20180347831A1 (en) 2018-12-06
CN108291551B (zh) 2020-02-14

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