EP2597380A2 - Dispositif, procédé, programme informatique et accumulateur d'eau chaude pour la régulation de la température - Google Patents

Dispositif, procédé, programme informatique et accumulateur d'eau chaude pour la régulation de la température Download PDF

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Publication number
EP2597380A2
EP2597380A2 EP12192498.9A EP12192498A EP2597380A2 EP 2597380 A2 EP2597380 A2 EP 2597380A2 EP 12192498 A EP12192498 A EP 12192498A EP 2597380 A2 EP2597380 A2 EP 2597380A2
Authority
EP
European Patent Office
Prior art keywords
temperature
hot water
standby temperature
standby
adjustment
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.)
Withdrawn
Application number
EP12192498.9A
Other languages
German (de)
English (en)
Other versions
EP2597380A3 (fr
Inventor
Stefan Burghardt
Christian Englisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2597380A2 publication Critical patent/EP2597380A2/fr
Publication of EP2597380A3 publication Critical patent/EP2597380A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F24D17/0031—Domestic hot-water supply systems with conventional heating means with accumulation of the heated water
    • 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
    • F24D17/0073—Arrangements for preventing the occurrence or proliferation of microorganisms in the water

Definitions

  • the present invention relates to a device, a method, a computer program and a hot water tank for controlling a temperature of a hot water tank.
  • hot water storage tanks e.g. to supply households with hot water
  • warm water is kept in a hot water tank.
  • the hot water storage may e.g. a boiler or a boiler.
  • the size of the hot water tank is determined by the respective need for hot water, for individual households are common sizes, e.g. at about 120-1501.
  • the standby temperature of the water in the hot water tank is regulated to a mostly adjustable value, which may be, for example, 60 ° C.
  • a mostly adjustable value which may be, for example, 60 ° C.
  • To heat the water often heat exchangers are used, which are heated on the primary side by a gas or oil burner, district heating, o. ⁇ .
  • the standby temperature is then maintained, possibly with a hysteresis of a few ° C, in the water reservoir. Removed warm water is then replaced by trailing cold water, which is then reheated accordingly.
  • the DE 103 00 041 A1 discloses a boiler for heating heating water and / or service water with a heated room, a burner, a control unit, a temperature sensor for heating water and / or a temperature sensor for process water, which are each connected to the control unit.
  • the control unit generates after dropping the temperature of the heating water under a stored in the control unit first switch-on or after dropping the temperature of the service water under a stored in the control unit second switch-on, each a switch-on to turn on the burner.
  • document DE 44 44 987 C1 discloses a method for controlling the heating of domestic water in a heating system.
  • the shutdown of the burner is not only when the target hot water temperature, but already at a lower shutdown temperature. This is so much lower than the hot water temperature that the latter is achieved during the usual follow-up time of the storage loading pump by further energy transfer from the boiler water to the hot water. Overheating of the process water is thereby avoided and at the same time the high boiler temperature is reduced by the further dhw charge.
  • the invention has for its object to provide an improved concept for controlling a temperature of a hot water tank.
  • an improved concept for a hot water tank which is more efficient, or requires less energy.
  • a standby power consumption in a hot water tank depends on the water temperature in the hot water tank. The greater the temperature difference of the water in the hot water tank and the ambient temperature, the more the water in the hot water tank cools and the greater the energy loss.
  • Embodiments are based on the finding that the control of the hot water temperature of conventional hot water tanks is independent of a user behavior.
  • Conventional systems regulate the water temperature in a hot water tank independent of a withdrawal characteristic. This leads to the fact that the temperature of the hot water tank is also kept high, if no withdrawals take place.
  • Exemplary embodiments are based, for example, on the knowledge that a standby temperature of a hot water storage tank can be lowered if no removal has taken place over a certain period of time. For example, if a household person goes on vacation, it makes little sense to maintain the readiness of the hot water storage over the period of their absence. For this reason, embodiments may provide that the standby temperature of a hot water tank is lowered when no hot water withdrawal has taken place over a certain period of time.
  • Embodiments provide a device for controlling a standby temperature of a hot water tank.
  • the device comprises a device for setting a standby temperature of the hot water in the hot water tank.
  • the device for adjustment is adapted to take into account in the setting of the standby temperature, a removal characteristic of hot water from the hot water tank such that the standby temperature of the hot water in a time interval in which no removal was detected, is lowered and raised after a subsequent removal again ,
  • embodiments consider the extraction characteristic, i. the user behavior, on a hot water tank at the standby temperature control.
  • Embodiments can thus enable automatic, energy-saving, usage-dependent and efficient operation of a hot water storage tank. This is achieved by lowering the standby temperature of the DHW cylinder in certain modes of operation. If, for example, no hot water extraction is detected over a certain period of time, the energy that would be necessary to maintain the standby temperature can be saved. This is the user behavior recorded in the hot water tank and taken into account when setting the standby temperature.
  • the means for adjusting the standby temperature may be configured to determine the extraction characteristic by detecting temperature fluctuations.
  • the determination of the extraction characteristic by detecting temperature fluctuations has the advantage that means for measuring the extraction characteristic in the actual cycle, such as a flow meter, can be dispensed with.
  • the apparatus may further comprise one or more temperature sensors for determining the temperature of the hot water, the temperature of a hot water feed, and / or the temperature of a cold water feed, wherein the one or more temperature sensors are coupled to the means for adjustment.
  • the temperatures may be detected at different locations throughout the cycle. For example, the temperature can be measured directly in the hot water tank. If now water is removed, then cold water is tracked, and the temperature in the heat storage decreases. This drop in temperature can be measured and a removal can be detected.
  • the temperature can also be detected in a hot water supply, i. where the warm water leaves the hot water tank. For example, in a hot water supply line, the temperature increases as soon as warm water flows through this line. If no warm water is removed, the water in the line stops and cools down slowly. Via a temperature sensor located there can thus be deduced by measuring the increase and / or decrease in the temperature in the line to a removal.
  • the cold water inlet corresponds to the pipe, over which cold water is added to the hot water tank. If cold water flows through this duct, the temperature drops, so that an inlet, and thus indirectly a removal, can be detected by a temperature sensor attached there. If the cold water flows through this line, it cools down. Once the removal is completed, and thus the cold water inflow is stopped, the cold water is in the line and this will heat up again, so that the conclusion on a withdrawal based on the temperature fluctuations is also possible here.
  • the adjustment means may be adapted to determine the extraction characteristic by determining a first temperature at a first time and determining a second temperature at a second time.
  • the means for adjustment may be further configured to determine a temperature change per unit time.
  • a temperature can be detected continuously, that is over a period of time. By comparing two temperatures at two different times, it can be determined whether the temperature is decreasing, increasing or remaining constant. The detection of these values allows the means for adjusting a detection of a temperature profile, in which also the slopes of the temperature can be determined accordingly.
  • the temporal temperature profile can be detected via a temperature sensor or a temperature sensor at a point in the overall system.
  • a plurality of temperature sensors can also be used in or on the hot water storage tank in order to determine or detect withdrawals as accurately as possible. For example, a removal operation can be detected if there is a relatively rapid change in temperature of the hot water supply of the hot water tank.
  • the means for adjustment may be configured to determine the extraction characteristic based on a temperature change at different locations.
  • the temperature change along a line can be detected.
  • two temperature sensors at a certain distance on a pipe such as the hot water supply, be appropriate. After the water cools down along the pipe, depending on the insulation of the pipe, it is possible to deduce the temperature difference at the two points on the volume taken off, taking into account the temperature of the warm water. In other words, the first warm water leaves the hot water tank and penetrates into the pipe. Therefore, at the beginning of this line, an increase in temperature will take place.
  • the pipe will heat up along its course, with the maximum temperature along the Line is to measure at the beginning, as well as the warm water in the line along the line cools. Measuring two temperatures along the pipe results in a temperature difference that depends on the insulation of the pipe, the distance between the two measuring points, the temperature of the water, the volume flow, and so on. All of these factors, however, can be determined beforehand and stored in the device for adjustment. In actual operation can then be concluded from the temperature change or the temperature difference along the line to the removal and optionally to the removal volume.
  • a simple threshold value comparison between the temperature change and a threshold value can be carried out in order to detect a removal.
  • a temperature change can be determined at a point offset in time, or along a line at at least two spatially offset points. If the temperature change exceeds or falls below a threshold value, a corresponding removal can also be detected.
  • the standby temperature can be adjusted.
  • several options are conceivable as the standby temperature is adjusted over time.
  • the standby temperature of the hot water storage is lowered linearly to a minimum standby temperature, as long as no removal is detected. In other words, the standby temperature steadily decreases as long as no removal is detected.
  • the slope of the Standby temperature reduction can be determined according to various criteria. For example, in one embodiment, the standby temperature decreases by 1 ° C./h, as long as no removal is detected. In other embodiments, a larger amount of time can be chosen.
  • the reduction may also be gradual.
  • the temperature may decrease gradually at regular intervals, for example by 10 ° C.
  • the standby temperature of the hot water storage is lowered by at least 10 ° when no withdrawals were detected over a time interval of at least 24h.
  • embodiments may provide the advantage of automatically lowering a standby temperature to achieve energy savings as soon as withdrawals miss over a longer period. For example, in a holiday phase, an energy saving can be achieved during the absence.
  • the means for adjustment may be adapted to raise the standby temperature at regular time intervals to a minimum temperature.
  • embodiments may provide that to prevent the formation of bacteria or Legionella, the water in the hot water tank at regular intervals to a minimum temperature, such as 60 °, is brought.
  • the standby temperature of the water can be lowered, the subsidence then being interrupted by the aforementioned regular intervals during which germs or legionella are killed.
  • the adjustment means may be adapted in embodiments to lower the standby temperature of the hot water storage to a minimum standby temperature when no withdrawals have been detected over a time interval of, for example, at least 72 hours.
  • This embodiment is directed, for example, to the holiday scenario described above. If no removal is detected over a time interval, for example 72 hours, the means for adjustment may be adapted to then adjust the temperature to a minimum temperature, i. to lower a minimum possible temperature. This has the advantage that no energy is lost at this point during absence.
  • the device for adjustment can moreover be adapted, in order subsequently, upon detection of a removal, to first approach the minimum temperature in order to kill bacteria and germs as already described above.
  • the means for adjustment may be further adapted not to lower the standby temperature below a minimum frost protection temperature. This offers the advantage that no damage caused by frost, etc.
  • the means for adjustment in embodiments may provide a lower temperature limit which will not be undershot.
  • Embodiments also provide a hot water tank with one of the above devices.
  • Embodiments further provide a method for controlling a standby temperature of a hot water storage.
  • the method includes setting a standby temperature the hot water in the hot water tank and detecting a withdrawal characteristic from the hot water tank.
  • the method includes a step of lowering the standby temperature when no removal is detected in a time interval.
  • the method further includes a step of raising the standby temperature after a subsequent removal.
  • Embodiments also include a computer program for performing any of the methods described above when the computer program is executed on a hardware component such as a computer or a processor.
  • Embodiments can enable energy savings with simple structural and cost-effective means, since the standby temperature of a hot water storage can be adapted to a user behavior and thus longer phases of Tinentnce and maintaining a high standby temperature can be avoided.
  • Fig. 1 shows an embodiment of a device 10 for controlling a standby temperature of a hot water tank 100.
  • the Fig. 1 an embodiment of the hot water tank 100, which includes the device 10.
  • the hot water tank 100 further includes a boiler 110 in which the warm water is stored. Hot water 120 can be used to remove warm water from the boiler. For replenishing cold water, the hot water tank 100 further comprises a cold water inlet 130.
  • the device 10 is located in the FIG. 1 for ease of illustration below the vessel 110 near the flow 120 and the inlet 130. In other embodiments, the device 10 may also be formed elsewhere or distributed, ie with locally separate components.
  • the device 10 comprises a device 12 for setting a standby temperature of the hot water in the hot water tank 100.
  • the device 12 for adjustment is adapted to take into account in the setting of the standby temperature, a removal characteristic of hot water from the hot water tank 100.
  • the standby temperature of the hot water is lowered in a time interval in which no removal was detected, and raised after a subsequent removal again. It is now possible to operate the hot water tank 100 depending on the user behavior.
  • the standby temperature setting means 12 is further configured to determine the extraction characteristic by detecting temperature variations.
  • the embodiment of the Fig.1 a plurality of temperature sensors 14a, 14b, 14c, which may also occur individually or in pairs in other embodiments.
  • Fig. 1 shows the temperature sensor 14 a of the determination of the temperature of the hot water 14 a in the boiler 110.
  • the temperature sensor is mounted in a measuring stub 140, which projects into the interior of the boiler 110.
  • another temperature sensor 14b is located on the hot water feed 120 to determine the temperature of the hot water feed 120.
  • a third temperature sensor 14c is located in the cold water inlet 130 and determines the temperature of the cold water inlet 130. All three temperature sensors 14a, 14b and 14c are coupled to the means 12 for adjustment.
  • Fig. 1 shows the detection of temperatures in different temperature zones of the hot water tank 100 (in the boiler, in the flow and in the inlet). In other embodiments, the detection can also take place in the course of a temperature zone, for example, along the hot water 120, along the cold water inlet 130, in the boiler 110 above and below, etc. All points at which the temperature changes at a removal are conceivable.
  • the adjustment means 12 may be configured to determine the extraction characteristic based on a temperature change at different locations.
  • the adjustment device 12 is adapted to determine the extraction characteristic by determining a first temperature T 1 at a first time t 1 and by determining a second temperature T 2 at a second time t 2 .
  • the device 12 may be configured to determine a slope of the temperature profile, eg
  • the temperature can be detected via one of the temperature sensors 14a, 14b, 14c at intervals, so that a time-discrete temperature profile is detected.
  • the signal of a temperature sensor 14a, 14b, 14c can then be quantized so that subsequently a digital signal processing can follow.
  • an increase or change in the temperature in the room for example, based on a gradient along the flow 120, the inlet 130 or at different points within the boiler or Boilers110, are determined.
  • the device 12 is configured to adjust based on a threshold comparison between the temperature change and a threshold
  • an extraction is detected or detected when the corresponding temperature gradient ⁇ T / ⁇ t or
  • the FIG. 2 1 shows a flowchart of an exemplary embodiment of a method for regulating the temperature of the hot water storage tank 100.
  • the method comprises setting 32 a standby temperature (BT) of the hot water in the hot water storage tank 100.
  • BT standby temperature
  • a detection 34 of a removal characteristic then concludes from the hot water storage tank 100 on. If no removal is detected in a time interval, there is a lowering 36 of the standby temperature. After a subsequent removal takes place raising 38 of the standby temperature. This may correspond to a raise to the original value.
  • the standby temperature T soll of the hot water storage tank 100 can be lowered, for example, by at least 10 ° C., if no withdrawals have been detected over a time interval of at least 24 hours. It is thus possible to put the hot water tank 100 in a power-saving mode when not in use for a long time by lowering the setpoint value of the storage tank temperature (standby temperature) after a defined time, eg by 10 ° C. per day.
  • the embodiment of Fig. 1 also has a frost protection limit to prevent any damage.
  • the adjustment means 12 is adapted to lower the standby temperature of the hot water storage 100 to the minimum standby temperature T min when no withdrawal has been detected over a time interval of at least 72 hours. This corresponds to the holiday circuit already described above, which, for example, after 3 days of non-use in the antifreeze mode.
  • the adjustment means 12 is adapted to raise the standby temperature T soll at regular intervals to a minimum temperature so as to prevent the formation of bacteria, germs, legionella, etc.
  • the described method is in the embodiment e.g. implemented by means of a microcontroller, a microprocessor or the like.
  • the embodiment also includes a computer program for performing any of the above methods when the computer program is run on a programmable hardware component, such as a computer. a computer or a processor.
  • aspects have been described in the context of a device, it will be understood that these aspects also constitute a description of the corresponding method, so that a block or a component of a device is also to be understood as a corresponding method step or as a feature of a method step. Similarly, aspects described in connection with or as a method step also represent a description of a corresponding block or detail or feature of a corresponding device.
  • embodiments of the invention may be implemented in hardware or in software.
  • the implementation may be performed using a digital storage medium, such as a floppy disk, a DVD, a Blue-Ray Disc, a CD, a ROM, a PROM, an EPROM, an EEPROM or FLASH memory, a hard disk, or other magnetic disk or optical memory are stored on the electronically readable control signals, which can cooperate with a programmable hardware component or cooperate such that the respective method is performed.
  • CPU central processing unit
  • GPU graphics processing unit
  • ASIC application-specific integrated circuit
  • IC Integrated Circuit
  • SOC system on chip
  • FPGA Field Programmable Gate Array
  • the digital storage medium may therefore be machine or computer readable.
  • some embodiments include a data carrier having electronically readable control signals capable of interacting with a programmable computer system or programmable hardware component such that one of the methods described herein is performed.
  • One embodiment is thus a data carrier (or a digital storage medium or a computer readable medium) on which the program is recorded for performing any of the methods described herein.
  • embodiments of the present invention may be implemented as a program, firmware, computer program, or computer program product having program code or data, the program code or data operative to perform one of the methods when the program resides on a processor or a computer programmable hardware component expires.
  • the program code or the data can also be stored, for example, on a machine-readable carrier or data carrier.
  • the program code or the data may be present, inter alia, as source code, machine code or bytecode as well as other intermediate code.
  • Another embodiment is further a data stream, a signal sequence, or a sequence of signals, which is the program for performing one of the herein represents or represent described method.
  • the data stream, the signal sequence or the sequence of signals can be configured, for example, to be transferred via a data communication connection, for example via the Internet or another network.
  • Embodiments are also data representing signal sequences that are suitable for transmission over a network or a data communication connection, the data representing the program.
  • a program may implement one of the methods during its execution by, for example, reading or writing one or more data into memory locations, optionally switching operations or other operations in transistor structures, amplifier structures, or other electrical, optical, magnetic or caused by another operating principle working components. Accordingly, by reading a memory location, data, values, sensor values or other information can be detected, determined or measured by a program.
  • a program can therefore acquire, determine or measure quantities, values, measured variables and other information by reading from one or more storage locations, as well as effect, initiate or execute an action by writing to one or more storage locations and control other devices, machines and components ,

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Control Of Temperature (AREA)
EP12192498.9A 2011-11-22 2012-11-14 Dispositif, procédé, programme informatique et accumulateur d'eau chaude pour la régulation de la température Withdrawn EP2597380A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011086819A DE102011086819A1 (de) 2011-11-22 2011-11-22 Vorrichtung, Verfahren, Computerprogramm und Warmwasserspeicher zur Regelung einer Temperatur

Publications (2)

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EP2597380A2 true EP2597380A2 (fr) 2013-05-29
EP2597380A3 EP2597380A3 (fr) 2018-03-28

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EP (1) EP2597380A3 (fr)
DE (1) DE102011086819A1 (fr)

Cited By (2)

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EP3034954A1 (fr) * 2014-12-16 2016-06-22 Robert Bosch Gmbh Appareil de commande pour un système d'eau chaude et procédé de fonctionnement d'un tel appareil de commande
EP4083521A1 (fr) * 2021-04-29 2022-11-02 Viessmann Climate Solutions SE Procédé de commande d'un système d'eau chaude domestique et système

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CN106969507B (zh) * 2017-05-25 2019-10-01 美的智慧家居科技有限公司 电热水器洗浴温度智能控制方法及装置
CN108151787B (zh) * 2017-11-28 2020-02-14 深圳达实智能股份有限公司 一种医院病房热水温升检测装置及方法
DE102021111197B3 (de) 2021-04-30 2022-05-05 Viessmann Climate Solutions Se Verfahren zum Betrieb einer wärmetechnischen Anlage
DE102023105813A1 (de) * 2023-03-09 2024-09-12 Vaillant Gmbh Verfahren zur Ladung eines Warmwasserspeichers, Regel- und Steuergerät, Vorrichtung zur Warmwasserbereitstellung und Computerprogramm

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DE10300041A1 (de) 2003-01-03 2004-07-22 Götz, Burkard Heizkessel mit Temperatursteuerung

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EP0121164A3 (fr) * 1983-03-15 1985-11-21 Friedrich Müller Appareil pour régler et/ou pour surveiller l'amenée de chaleur à un chauffe-eau et/ou à un générateur de chaleur ambiante
NZ538737A (en) * 2005-03-10 2008-04-30 Hot Water Innovations Ltd Electronic control of water storage (hot water storage) parameters and operation
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AT504286B1 (de) * 2006-09-18 2008-09-15 Vaillant Austria Gmbh Verfahren zur ladung eines warmwasserspeichers
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DE4444987C1 (de) 1994-12-16 1996-04-18 Buderus Heiztechnik Gmbh Verfahren zur Regelung der Brauchwasseraufheizung in einer Heizungsanlage
DE10300041A1 (de) 2003-01-03 2004-07-22 Götz, Burkard Heizkessel mit Temperatursteuerung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3034954A1 (fr) * 2014-12-16 2016-06-22 Robert Bosch Gmbh Appareil de commande pour un système d'eau chaude et procédé de fonctionnement d'un tel appareil de commande
EP4083521A1 (fr) * 2021-04-29 2022-11-02 Viessmann Climate Solutions SE Procédé de commande d'un système d'eau chaude domestique et système

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Publication number Publication date
DE102011086819A1 (de) 2013-05-23
EP2597380A3 (fr) 2018-03-28

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