NL2026436B1 - Warm water supply arrangement - Google Patents

Warm water supply arrangement Download PDF

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Publication number
NL2026436B1
NL2026436B1 NL2026436A NL2026436A NL2026436B1 NL 2026436 B1 NL2026436 B1 NL 2026436B1 NL 2026436 A NL2026436 A NL 2026436A NL 2026436 A NL2026436 A NL 2026436A NL 2026436 B1 NL2026436 B1 NL 2026436B1
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NL
Netherlands
Prior art keywords
unit
hot water
warm water
boiler
flow
Prior art date
Application number
NL2026436A
Other languages
Dutch (nl)
Inventor
Diependaal Gijs
Paul Huis In 't Veld Hugo
Original Assignee
Eneco B V
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 Eneco B V filed Critical Eneco B V
Priority to NL2026436A priority Critical patent/NL2026436B1/en
Application granted granted Critical
Publication of NL2026436B1 publication Critical patent/NL2026436B1/en

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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
    • 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
    • F24D17/0089—Additional heating means, e.g. electric heated buffer tanks or electric continuous flow heaters, located close to the consumer, e.g. directly before the water taps in bathrooms, in domestic hot water lines
    • 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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/185—Water-storage heaters using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0257—Thermostatic valves
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors

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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)

Abstract

A warm water supply arrangement (1) and a method of warm water supply using a combination of a boiler unit (2) having a storage buffer (6) and a first electrical heater (7) and a flow supply unit (3) having a flow channel (8) and a second electrical heater (9). A control unit (5) is connected to an electrical supply unit (4) and to a warm water demand sensor (10), and arranged for setting the electrical supply unit (4) to provide electrical powerto the first electrical heater (7) only, if the warm water demand sensor signal is evaluated to indicate no warm water demand, and for setting the electrical supply unit (4) to provide electrical power to the second electrical heater (9) only, if the warm water demand sensor signal is evaluated to indicate warm water demand.

Description

P6095579NL 1 Warm water supply arrangement Field of the invention The present invention relates to a warm water supply arrangement, comprising a boiler unit having a storage buffer with a cold water boiler input and a warm water boiler output, and a first electrical heater, the first electrical heater being positioned for heating water inside the storage buffer during operation.
In a further aspect, the present invention relates to a method for supplying warm water.
Background art US patent publication US2020/173685 discloses an electric water heater which is to be disposed close to a faucet or the like in order to provide heated water.
The electric water heater allows provision of warm water almost instantly, thereby eliminating waiting for warm water from a remotely located warm water supply, such as a boiler vessel or central heating system.
Summary of the invention The present invention seeks to provide an alternative for locally installed water supply units working with electric heaters under space and electric supply current constraints.
The arrangement should be small enough to allow local installation near a warm water tap point, yet provide sufficient warm water capacity to meet predetermined capacity standards.
According to the present invention, a warm water supply arrangement as defined above is provided, further comprising a flow supply unit having a flow channel with a cold water flow input and a warm water flow output, and a second electrical heater positioned to heat water flowing through the flow channel during operation, an electrical supply unit connected to the first electrical heater and the second electrical heater, and a control unit connected to the electrical supply unit and to a warm water demand sensor providing a warm water demand sensor signal, wherein the control unit is arranged for setting the electrical supply unit to provide electrical power to the first electrical heater only, if the warm water demand sensor signal is evaluated to indicate no warm water demand, and for setting the electrical supply unit to provide electrical power to the second electrical heater only, if the warm water demand sensor signal is evaluated to indicate warm water demand.
In a further aspect, the present invention relates to a method as defined above, wherein warm water supply is obtained from a combination of a boiler unit having a storage buffer with a cold water boiler input and a warm water boiler output, and a first electrical heater, the first electrical heater being positioned for heating water inside the storage buffer during operation, and a flow supply unit having a flow channel with a cold water flow input and a warm water flow output, and a second electrical heater positioned to heat water flowing through the flow channel during operation.
The method comprises setting an electrical supply unit to provide electrical power to the first electrical heater only, if no warm water demand is detected, and setting the electrical supply unit to provide electrical power to the second electrical heater only, if a warm water demand is detected.
P6095579NL 2 Existing warm water supply arrangements using electric heaters under the same constraints of power or space for boiler storage cannot provide either the temperature or water flow capacity for residential uses, thus a gas system is usually employed.
The present invention embodiments allow the replacement of a gas based locally installed warm water supply arrangement, with easy installation, and using electrical power supply only. The capacity for supplying warm water can be made sufficiently high to allow comfortable warm water use, such as for rinsing, cleaning and shower use. Short description of drawings The present invention will be discussed in more detail below, with reference to the attached drawings, in which Fig. 1 shows a schematic diagram of a first embodiment of a warm water supply arrangement according to an embodiment of the present invention; and Fig. 2 shows a detailed schematic diagram of a further embodiment of a warm water supply arrangement according to an embodiment of the present invention.
Description of embodiments In many homes, warm water supply for kitchens and/or bathrooms is provided by a gas based local heater, i.e. a flow through type of warm water supply. In order to be able to disconnect a home from gas supply completely, or in situations where no natural gas supply is available at all, alternative forms of warm water supply are needed. The alternative arrangements will need to be able to provide predetermined flow, temperature and time parameters, e.g. in accordance with the Dutch CW classes for warm water supply, often within predetermined power supply constraints. Many presently operating gas based local heaters have a capacity of e.g. 9 kW, allowing to provide about 3.5 liter per minute of warm water with a temperature of 60°C (i.e. in accordance with Dutch CW1 class).
The reasons for replacing these gas based local heaters include e.g. that these heaters use oxygen from the surroundings, and expel flue gasses locally, negatively influencing the living environment. Also, the desire to use less natural gas in houses is clear, and often these small gas based local heaters are the last apparatus in a house using natural gas.
Alternatives using electrical heating of water are known as such, but usually with limited capacity with regard to electrical power, and hence limited capacity in volume flow, temperature, and time period of providing warm water. It is noted that the present invention embodiments are operating on electrical power only, and can be implemented with a limited power need, e.g. less than 5kW (or about 20A at 240V AC), allowing to use a dedicated socket (locally available near the warm water supply) for providing power. The dedicated socket is connected via a separate cable connection and circuit breaker to the mains supply of the home, which sometimes is already available in the kitchen area.
Fig. 1 shows a schematic view of an embodiment of a warm water supply arrangement 1 according to the present invention. In the embodiment shown, cold water is supplied at the top (indicated by left arrow) and warm water is supplied at the bottom right part (indicated by right
P6095579NL 3 arrow). The warm water supply arrangement 1 comprises a boiler unit 2 having a storage buffer 6 with a cold water boiler input 6a and a warm water boiler output 6b, and a first electrical heater 7.
The first electrical heater 7 is positioned for heating water inside the storage buffer 6 during operation. Furthermore, the warm water supply arrangement 1 comprises a flow supply unit 3 having a flow channel 8 with a cold water flow input 8a and a warm water flow output 8b. A second electrical heater 9 is positioned to heat water flowing through the flow channel 8 during operation, e.g. in the form of an instant heater or direct heater. An electrical supply unit 4 is connected to the first electrical heater 7 and the second electrical heater 9. A control unit 5 is connected to the electrical supply unit 4 and to a warm water demand sensor 10 providing a warm water demand sensor signal. The control unit 5 is arranged for setting the electrical supply unit 4 to provide electrical power to the first electrical heater 7 only, if the warm water demand sensor signal is evaluated to indicate no warm water demand. This allows the boiler unit 2 to heat up water for a subsequent warm water demand. Furthermore, the control unit 5 is arranged for setting the electrical supply unit 4 to provide electrical power to the second electrical heater 9 only, if the warm water demand sensor signal is evaluated to indicate warm water demand. This allows to provide a continuous stream of warm water using the flow supply unit 3. In other words, an (electric) warm water supply arrangement 1 is provided in which a control unit 5 enables a maximum warm water flow and temperature that temporarily exceed the water flow and temperature which is currently possible using existing domestic electricity supply and space constraints.
Using this invention embodiment, it is possible to combine the advantageous characteristics of both the boiler unit 2 (a.o. capacity to provide high temperature water) and the flow supply unit 3 (a.0. a constant flow and warm temperature water) in order to locally provide a predetermined quantity and quality of warm water. The boiler unit 2 can use electrical power whenever available to (slowly) heat up water stored in the storage buffer 6, and the flow supply unit 3 can use electrical power when a warm water demand is present to allow continuous supply of warm water. By combining warm water output from the boiler unit 2 and from the flow supply unit, during a predetermined time, until the warm water in the storage buffer 6 is fully used, a higher volume of water flow at a minimum temperature may be provided (providing a higher CW class).
In a further embodiment, the electrical supply unit 4 comprises a changeover switch 11 for providing electrical power to either the first electrical heater 7 or to the second electrical heater 9, as shown in the exemplary embodiment of Fig. 1. This ensures that electrical power is supplied to only one load at any given time, allowing to ensure a maximum power usage of the warm water supply arrangement 1, and thus to operate alongside other electrical power users in a domestic environment.
To ensure warm water with a pre-set temperature, the warm water supply from the boiler unit 2 is interrupted as soon as the temperature of the water drops below a pre-set temperature. To that end, the boiler unit 2 in a further embodiment (as in the exemplary embodiment shown in Fig. 1) further comprises a valve unit 12 in communication with the warm water boiler output 6b, and a temperature sensor 13 near the warm water boiler output 6b providing a temperature sensor signal,
P6095579NL 4 the valve unit 12 being arranged to close off the warm water boiler output 6b if the temperature sensor signal is evaluated to be below a predetermined temperature threshold value.
The present invention can also be implemented as method embodiments, e.g. being executed in the control unit 5 of the Fig. 1 embodiment described above.
In a first method embodiment, a method is provided for supplying warm water from a combination of a boiler unit 2 and a flow supply unit 3. The boiler unit 2 has a storage buffer 6 with a cold water boiler input 6a and a warm water boiler output 6b, and a first electrical heater 7, the first electrical heater 7 being positioned for heating water inside the storage buffer 6 during operation.
The flow supply unit 3 has a flow channel 8 with a cold water flow input 8a and a warm water flow output 8b, and a second electrical heater 9 positioned to heat water flowing through the flow channel 8 during operation.
The method further comprises setting an electrical supply unit 4 to provide electrical power to the first electrical heater 7 only, if no warm water demand is detected, and setting the electrical supply unit 4 to provide electrical power to the second electrical heater 9 only, if a warm water demand is detected.
By making the distinction between presence of warm water demand or no warm water demand, the characteristics of the boiler unit 2 and flow supply unit 3 can be optimized for operation of the combination of both.
In an exemplary embodiment, the method further comprises providing electrical power to either the first electrical heater 7 or to the second electrical heater 9 at any given moment in time.
This ensures that the total electrical power consumption of the combination is kept below a maximum allowed level (e.g. dictated by power rating considerations). In en even further embodiment, the method further comprises closing off the warm water boiler output 6b if a local temperature is detected below a predetermined temperature threshold value.
This allows to automatically shut off the boiler unit 2 once the heated water in the storage buffer 6 is depleted.
In a further embodiment, the storage buffer 6 has a capacity of less than 25 liters, e.g. less than 15 liters, e.g. 10 liters.
When using a small storage buffer 6, the external dimensions of the boiler unit 2, and consequently of the entire warm water supply arrangement 1, can be kept small, enabling easy installation and positioning.
Yet the mentioned exemplary capacities at the same time allow to provide warm water with a minimum flow during a predetermined time, allowing to meet desired warn water flow capacities.
As an example, the entire warm water supply arrangement 1 is included in a housing of less than 600x600x600mm, allowing for easy installation in a kitchen cabinet.
This provides the additional advantage that the installation of the warm water supply arrangement 1 can be carried out by one person in a limited amount of time (e.g. less than 3 hours). The boiler unit 2 in an even further embodiment has a capacity of storing water with a temperature of at least 60°C, e.g. 80°C.
This allows to provide CW3 grade temperatures, and (for a pre-set time) sufficiently warm water (>60°C) to e.g. rinse off a greasy (frying) pan, or e.g. to provide sufficiently warm water (40°C) for a comfortable shower during a period of 10 minutes.
As mentioned above, the warm water supply arrangement 1 allows to combine the warm water output from both the boiler unit 2 and the flow supply unit 3. Therefore, until the storage buffer 6 is depleted, a high (volumetric) flow rate of water (e.g. 8 liters/minute) can be supplied at a temperature of 40°C (or even higher) during a first time period, and after that a continuous stream of 40°C can be 40 supplied using the flow supply unit 3 only at a lower volume (e.g. 2.1 liters/minute).
P6095579NL It is noted that the components of the warm water supply arrangement 1 can be off-the- shelf components, which has the advantage of cost reduction (readily available components) and obviating the need of full certification.
Fig. 2 shows a further detailed schematic view of a further embodiment of a warm water 5 supply arrangement 1 in accordance with the present invention. It is noted that the exemplary embodiments described above with reference to the exemplary embodiment of Fig. 1 can also be applied to the further exemplary embodiment described with reference to Fig. 2, and vice versa. In the exemplary embodiment of Fig. 2, more details on the electrical supply side and control components of the warm water supply are shown, implementing the electrical supply unit 4 and control unit 5.
In the embodiment shown in Fig. 2, the warm water supply arrangement 1 provides cold water and warm water to users (kitchen tap 23, bathroom sink tap 24 and shower tap 25) via a cold water supply line 26 and a warm water supply line 27, respectively. Furthermore, water flow components which are usually present are indicated, i.e. a check valve 21 upstream from the cold water flow input 8a, and a connection combination 22 upstream from the boiler unit 2 (with check valve, shut-off valve and overflow), and flow limiters at the outputs 6b, 8b of the boiler unit 2 and flow supply unit 3, respectively.
It is noted that in the exemplary embodiment shown in Fig. 2, the warm water demand sensor 10 is provided in the part of the cold water supply line 26 feeding the boiler unit 2 and flow supply unit 3 (as opposed to a position in the warm water supply line 27 in the exemplary embodiment as shown in Fig. 1).
The electrical supply unit 4 and control unit 5 are implemented using various components as detailed in Fig. 2. The utility power supply (live and neutral lines L and N) is connected to a transformer 15, which provides a low voltage supply to a first relay switch 16 via a switch 17 controlled by the warm water demand sensor 10. The first relay switch 16 is engaged once warm water flow demand is detected to pre-load a motor actuator 19 connected to the valve unit 12, and to pre-load the (high voltage) changeover switch 11. If the temperature sensor 13 senses a sufficiently high temperature in the storage buffer 6, the motor actuator 19 is not actuated by opening switch 18. Once a too low temperature is detected, the switch 18 closes, thereby closing the motor actuator 19 circuit, and effectively stopping water supply from the warm water boiler output 6b to the warm water supply line 27. The operation of the changeover switch 11 is similar to the description thereof above with reference to the Fig. 1 embodiment, i.e. the changeover switch 11 ensures that only the boiler unit 2 or the flow supply unit 3 is powered. In an even further embodiment, the boiler unit 2 has a power rating 5kW or less, e.g. 2.2kW. The upper limit ensures that it is possible to connect the warm water supply arrangement 1 using a simple socket connection to the electrical supply lines L, N. Using the lower exemplary value, it is possible to allow operation of the warm water supply arrangement 1 for long time periods, even when other nearby loads are being powered in the same house. Additionally or alternatively, in a further embodiment the flow supply unit 3 has a power rating of 5kW or less.. It is noted the 40 maximum value for both the boiler unit 2 and the flow supply unit 3 may be 3.8kW, which would
P6095579NL 6 allow to connect the warm water supply arrangement 1 to an electrical group secured with a 16A circuit breaker.
In an advantageous embodiment, the flow supply unit 3 has a capacity of continuously supplying water with a temperature of at least 40°C.
This allows to use the warm water supply arrangement 1 during longer periods for various applications, such as rinsing, showering, etc.
In a further embodiment, the flow supply unit 3 has a capacity of continuously providing water with at least 2 l/min.
This would allow the warm water supply arrangement to act as a replacement for a CW1 graded gas based local heater as is presently used in many homes.
The exemplary embodiment shown in Fig. 2 is e.g. used in the following manner.
If no warm water demand is detected (using warm water demand sensor 10), the boiler unit 2 is provided with electrical power allowing it to warm up water in the storage buffer 6 to 80°C.
If one of the warm water taps 23-25 is opened, the electrical power is redirected to the flow supply unit 3 alone, which provides a flow rate of 2.1 liters/minute at 40°C.
The boiler unit 2 is arranged to mix warm water (at 80°C) to obtain a water flow rate of 4.2 liters/minute at 60°C in the warm water supply line 27. Once it is detected that the storage buffer 6 is emptied (using temperature sensor 13), the valve unit 12 is operated to close off the boiler unit 2. This causes the water flow in the warm water supply line to drop to 2.1. liters/minute at 40°C (continuously). This mode of operation (using the maximum capacities indicated above) ensures that at any given moment in time no more than 20A is taken up by the warm water supply arrangement 1. This would allow to connect the warm water supply arrangement 1 to use with home electrical systems rated at a maximum of 35A connection.
For the user, it allows to shower comfortably for 10 minutes, and after e.g. 15 minutes of pause (for powering the boiler unit 2), a 10 minute comfortable shower can be taken again.
In a further embodiment, the warm water supply arrangement 1 further comprises an indicator unit 5a connected to the control unit 5, the control unit 5 being further arranged to indicate an operating mode of the warm water supply arrangement 1 via the indicator unit 5a.
In addition, the indicator unit 5a may be arranged to provide an indication of error codes.
This has the advantage of allowing quicker (remote) correct operation and/or fault checking.
In a yet further embodiment, the control unit 5 is further arranged for receiving power consumption data of other locally connected electrical loads 14 (as shown in the exemplary embodiment of Fig. 1), and for setting the electrical supply unit 4 to provide electrical power to the boiler unit 2 or the flow supply unit 3 at a de-rated level in dependence of evaluation of the received power consumption data.
This embodiments allows to provide a smart warm water supply arrangement 1, e.g. arranged to check power consumption of second/further electrical loads from the same supply lines L, N (such as an induction plate, or electric oven), and if necessary (temporarily) operate the warm water supply arrangement 1 at a lower power setting.
The data on the locally connected electrical loads 14 may be obtained directly or indirectly, e.g. wirelessly using a home automation application.
The present invention embodiments described above are exemplary implementations, in the alternative, the invention can be described by the following numbered and interdependent 40 embodiment clauses:
P6095579NL 7 Embodiment 1. A warm water supply arrangement (1), comprising a boiler unit (2) having a storage buffer (8) with a cold water boiler input (6a) and a warm water boiler output (6b), and a first electrical heater (7), the first electrical heater (7) being positioned for heating water inside the storage buffer (6) during operation,
a flow supply unit (3) having a flow channel (8) with a cold water flow input (8a) and a warm water flow output (8b), and a second electrical heater (9) positioned to heat water flowing through the flow channel (8) during operation,
an electrical supply unit (4) connected to the first electrical heater (7) and the second electrical heater (9), and a control unit (5) connected to the electrical supply unit (4) and to a warm water demand sensor (10) providing a warm water demand sensor signal, wherein the control unit (5) is arranged for setting the electrical supply unit (4) to provide electrical power to the first electrical heater (7) only, if the warm water demand sensor signal is evaluated to indicate no warm water demand, and for setting the electrical supply unit (4) to provide electrical power to the second electrical heater (9) only, if the warm water demand sensor signal is evaluated to indicate warm water demand.
Embodiment 2. The warm water supply arrangement according to embodiment 1, wherein the electrical supply unit (4) comprises a changeover switch (11) for providing electrical power to either the first electrical heater (7) or to the second electrical heater (9). Embodiment 3. The warm water supply arrangement according to embodiment 1 or 2, wherein the boiler unit (2) further comprises a valve unit (12) in communication with the warm water boiler output (6b), and a temperature sensor (13) near the warm water boiler output (6b) providing a temperature sensor signal, the valve unit (12) being arranged to close off the warm water boiler output (6b) if the temperature sensor signal is evaluated to be below a predetermined temperature threshold value.
Embodiment 4. The warm water supply arrangement according to any one of embodiments 1-3, wherein the storage buffer (8) has a capacity of less than 25 liters, e.g. less than 15 liters, e.g. 10 liters.
Embodiment 5. The warm water supply arrangement according to any one of embodiments 1-4, wherein the boiler unit (2) has a capacity of storing water with a temperature of at least 60°C, e.g. 80°C.
Embodiment 6. The warm water supply arrangement according to any one of embodiments 1-5, wherein the boiler unit (2) has a power rating 5kW or less, e.g. 2.2kW.
Embodiment 7. The warm water supply arrangement according to any one of embodiments 1-6, wherein the flow supply unit (3) has a capacity of continuously supplying water with a temperature of at least 40°C.
Embodiment 8. The warm water supply arrangement according to any one of embodiments 1-7, wherein the flow supply unit (3) has a capacity of continuously providing water with at least 2 liters/min.
P6095579NL 8 Embodiment 9. The warm water supply arrangement according to any one of embodiments 1-8, wherein the flow supply unit (3) has a power rating of 5kW or less.
Embodiment 10. The warm water supply arrangement according to any one of embodiments 1-9, further comprising an indicator unit (5a) connected to the control unit (5), the control unit (5) being further arranged to indicate an operating mode of the warm water supply arrangement (1) via the indicator unit (5a). Embodiment 11. The warm water supply arrangement according to any one of embodiments 1-9, wherein the control unit (5) is further arranged for receiving power consumption data of other locally connected electrical loads (14), and for setting the electrical supply unit (4) to provide electrical power to the boiler unit (2) or the flow supply unit (3) at a de-rated level in dependence of evaluation of the received power consumption data.
Embodiment 12. A method for supplying warm water from a combination of a boiler unit (2) having a storage buffer (6) with a cold water boiler input (6a) and a warm water boiler output (6b), and a first electrical heater (7), the first electrical heater (7) being positioned for heating water inside the storage buffer (8) during operation, and a flow supply unit (3) having a flow channel (8) with a cold water flow input (8a) and a warm water flow output (8b), and a second electrical heater (9) positioned to heat water flowing through the flow channel (8) during operation, the method comprising: setting an electrical supply unit (4) to provide electrical power to the first electrical heater (7) only, if no warm water demand is detected, and setting the electrical supply unit (4) to provide electrical power to the second electrical heater (9) only, if a warm water demand is detected.
Embodiment 13. The method according to embodiment 12, further comprising providing electrical power to either the first electrical heater (7) or to the second electrical heater (9) at any given moment in time.
Embodiment 14. The method according to embodiment 12 or 13, further comprising closing off the warm water boiler output (6b) if a local temperature is detected below a predetermined temperature threshold value.
The present invention has been described above with reference to a number of exemplary embodiments as shown in the drawings.
Modifications and alternative implementations of some parts or elements are possible, and are included in the scope of protection as defined in the appended claims.

Claims (14)

P8095579NL 9 ConclusiesP8095579EN 9 Conclusions 1. Een opstelling voor warmwatervoorziening (1), omvattend een boilereenheid (2) omvattend een opslagbuffer (6) met een koudwaterboileraanvoer (6a) en een warmwaterboileruitvoer (6b), en een eerste elektrische opwarmer (7), waarbij de eerste elektrische opwarmer (7) gepositioneerd is voor opwarmen van water in de opslagbuffer (6) tijdens bedrijf, een doorstroomeenheid (3) omvattend een stroomkanaal (8) met een koudwaterstroomaanvoer (8a) en een warmwaterstroomuitvoer (8b), en een tweede elektrische opwarmer (9) die gepositioneerd is om water dat door het stroomkanaal (8) te verwarmen tijdens bedrijf, een elektriciteitsvoorzieningseenheid (4) die verbonden is met de eerste elektrische opwarmer (7) en de tweede elektrische opwarmer (9), en een besturingseenheid (5) die verbonden is met de elektriciteitsvoorzieningseenheid (4) en met een warmwatervraagsensor (10) die een warmwatervraagsensorsignaal verschaft, waarbij de besturingseenheid (5) is ingericht voor instellen van de elektriciteitsvoorzieningseenheid (4) om elektrisch vermogen te verschaffen aan alleen de eerste elektrische opwarmer (7), indien het warmwatervraagsensorsignaal wordt geëvalueerd dat deze geen warmwatervraag aangeeft, en voor instellen van de elektriciteitsvoorzieningseenheid (4) om elektrisch vermogen te verschaffen aan alleen de tweede elektrische opwarmer (9) indien het warmwatervraagsensorsignaal wordt geëvalueerd dat deze warmwatervraag aangeeft.A hot water supply arrangement (1), comprising a boiler unit (2) including a storage buffer (6) having a cold water boiler inlet (6a) and a hot water boiler outlet (6b), and a first electric heater (7), the first electric heater ( 7) is positioned for heating water in the storage buffer (6) during operation, a flow-through unit (3) comprising a flow channel (8) having a cold water flow inlet (8a) and a hot water flow outlet (8b), and a second electric heater (9) which positioned to heat water through the flow channel (8) during operation, an electricity supply unit (4) connected to the first electrical heater (7) and the second electrical heater (9), and a control unit (5) connected with the electricity supply unit (4) and with a hot water demand sensor (10) providing a hot water demand sensor signal, the control unit (5) being adapted to adjust the electricity supply unit (4) to supply electric power to only the first electric heater (7), if the hot water demand sensor signal is evaluated to indicate no hot water demand, and to set the electricity supply unit (4) to supply electric power to only the second electric heater (9) if the hot water demand sensor signal is evaluated indicating this hot water demand. 2. De opstelling voor warmwatervoorziening volgens conclusie 1, waarbij de elektriciteitsvoorzieningseenheid (4) een wisselschakelaar (11) omvat voor verschaffen van elektrisch vermogen òf aan de eerste elektrische opwarmer (7) òf aan de tweede elektrische opwarmer (9).The hot water supply arrangement according to claim 1, wherein the electricity supply unit (4) comprises a changeover switch (11) for supplying electric power either to the first electric heater (7) or to the second electric heater (9). 3. De opstelling voor warmwatervoorziening volgens conclusie 1 of 2, waarbij de boilereenheid (2) verder een klepeenheid (12) omvat die in verbinding staat met de warmwaterboileruitvoer (6b), en een temperatuursensor (13) nabij de warmwaterboileruitvoer (6b) die een temperatuursensorsignaal afgeeft, waarbij de klepeenheid (12) is ingericht om de warmwaterboileruitvoer (6b) af te sluiten indien het temperatuursensorsignaal wordt geëvalueerd als zijnde minder dan een vooraf bepaalde temperatuurdrempelwaarde.The hot water supply arrangement according to claim 1 or 2, wherein the boiler unit (2) further comprises a valve unit (12) in communication with the hot water boiler outlet (6b), and a temperature sensor (13) near the hot water boiler outlet (6b) which detects a outputs a temperature sensor signal, wherein the valve unit (12) is arranged to shut off the hot water boiler output (6b) if the temperature sensor signal is evaluated as being less than a predetermined temperature threshold value. P8095579NL 10P8095579NL 10 4. De opstelling voor warmwatervoorziening volgens één van de conclusies 1-3, waarbij de opslagbuffer (6) een capaciteit heeft van minden dan 25 liter, bijvoorbeeld minder dan 15 liter, bijvoorbeeld 10 liter.The hot water supply arrangement according to any one of claims 1-3, wherein the storage buffer (6) has a capacity of less than 25 litres, for example less than 15 litres, for example 10 litres. 5. De opstelling voor warmwatervoorziening volgens één van de conclusies 1-4, waarbij de boilereenheid (2) een capaciteit heeft voor opslag van water met een temperatuur van ten minste 60°C, bijvoorbeeld 80°C.The hot water supply arrangement according to any one of claims 1-4, wherein the boiler unit (2) has a capacity for storing water having a temperature of at least 60°C, for example 80°C. 6. De opstelling voor warmwatervoorziening volgens één van de conclusies 1-5, waarbij de boilereenheid (2) een vermogen heeft van 5kW of minder, bijvoorbeeld 2.2kW.The hot water supply arrangement according to any one of claims 1-5, wherein the boiler unit (2) has a power of 5kW or less, for example 2.2kW. 7. De opstelling voor warmwatervoorziening volgens één van de conclusies 1-6, waarbij de doorstroomeenheid {3) een capaciteit heeft voor continue voorziening van water met een temperatuur van ten minste 40°C.The hot water supply arrangement according to any one of claims 1-6, wherein the flow-through unit {3) has a capacity for continuous supply of water having a temperature of at least 40°C. 8. De opstelling voor warmwatervoorziening volgens één van de conclusies 1-7, waarbij de doorstroomeenheid (3) een capaciteit heeft voor continue voorziening van water van ten minste 2 liter/min.The hot water supply arrangement according to any one of claims 1 to 7, wherein the flow-through unit (3) has a continuous water supply capacity of at least 2 litres/min. 9. De opstelling voor warmwatervoorziening volgens één van de conclusies 1-8, waarbij de doorstroomeenheid (3) een vermogen heeft van 5kW of minder.The hot water supply arrangement according to any one of claims 1-8, wherein the flow-through unit (3) has a power of 5kW or less. 10. De opsteling voor warmwatervoorziening volgens één van de conclusies 1-9, verder omvattend een indicatoreenheid (5a) die verbonden is met de besturingseenheid (5), waarbij de besturingseenheid (5) verder is ingericht om een bedrijfsmodus van de opstelling voor warmwatervoorziening (1) te verschaffen via de indicatoreenheid (5a).The hot water supply arrangement according to any one of claims 1-9, further comprising an indicator unit (5a) connected to the control unit (5), the control unit (5) being further configured to select an operating mode of the hot water supply arrangement ( 1) to be provided via the indicator unit (5a). 11. De opstelling voor warmwatervoorziening volgens één van de conclusies 1-9, waarbij de besturingseenheid (5) verder is ingericht voor ontvangen van vermogengebruikgegevens van verdere lokaal verbonden elektrische belastingen (14), en voor instellen van de elektriciteitsvoorzieningseenheid (4) om elektrisch vermogen aan de boilereenheid (2) of de doorstroomeenheid (3) verschaffen op een gedegradeerd niveau in afhankelijkheid van evaluatie van de ontvangen vermogengebruikgegevens.The hot water supply arrangement according to any one of claims 1-9, wherein the control unit (5) is further adapted to receive power usage data from further locally connected electrical loads (14), and to adjust the electrical supply unit (4) to supply electrical power. provide to the boiler unit (2) or the flow-through unit (3) at a degraded level depending on evaluation of the received power utilization data. P8095579NL 11P8095579EN 11 12. Een werkwijze voor voorzien van warm water vanuit een combinatie van een boilereenheid (2) omvattend een opslagbuffer (6) met een koudwaterboileraanvoer (6a) en een warmwaterboileruitvoer (6b), en een eerste elektrische opwarmer (7), waarbij de eerste elektrische opwarmer (7) gepositioneerd is voor opwarmen van water in de opslagbuffer (6) tijdens bedrijf, en een doorstroomeenheid (3) omvattend een stroomkanaal (8) met een koudwaterstroomaanvoer (8a) en een warmwaterstroomuitvoer (8b), en een tweede elektrische opwarmer (8) die gepositioneerd is om water dat door het stroomkanaal (8) te verwarmen tijdens bedrijf, waarbij de werkwijze omvat: instellen van een elektriciteitsvoorzieningseenheid (4) om elektrisch vermogen alleen aan de eerste elektrische opwarmer (7) te verschaffen indien geen warmwatervraag wordt gedetecteerd, en instellen van de elektriciteitsvoorzieningseenheid (4) om elektrisch vermogen alleen aan de tweede elektrische opwarmer (9) te verschaffen indien een warmwatervraag wordt gedetecteerd.A method of providing hot water from a combination of a boiler unit (2) comprising a storage buffer (6) having a cold water boiler inlet (6a) and a hot water boiler outlet (6b), and a first electric heater (7), the first electric heater heater (7) is positioned for heating water in the storage buffer (6) during operation, and a flow-through unit (3) comprising a flow channel (8) having a cold water flow inlet (8a) and a hot water flow output (8b), and a second electric heater ( 8) positioned to heat water passing through the flow channel (8) during operation, the method comprising: setting an electricity supply unit (4) to provide electric power to the first electric heater (7) only if no hot water demand is detected , and setting the power supply unit (4) to provide electric power to the second electric heater (9) only when a hot water query is detected. 13. De werkwijze volgens conclusie 12, verder omvattend verschaffen van elektrisch vermogen òf aan de eerste elektrische opwarmer (7) òf aan de tweede elektrische opwarmer (9), op enig moment in tijd.The method of claim 12, further comprising providing electrical power to either the first electrical heater (7) or the second electrical heater (9) at any point in time. 14. De werkwijze volgens conclusie 12 of 13, verder omvattend afsluiten van de warmwaterboileruitvoer (6b) indien een lokale temperatuur wordt gedetecteerd van minder dan een vooraf bepaalde temperatuurdrempelwaarde.The method according to claim 12 or 13, further comprising shutting off the hot water boiler output (6b) if a local temperature of less than a predetermined temperature threshold value is detected.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200439A (en) * 1987-01-21 1988-08-03 Caradon Mira Ltd Instantaneous water heaters for showers
DE8903651U1 (en) * 1989-03-22 1989-05-11 Bosch-Siemens Hausgeräte GmbH, 8000 München Device for heating water
EP1548376A1 (en) * 2003-12-22 2005-06-29 THERMOWATT S.p.A. Post heating device for accumulator electric water heaters
AU2007203198A1 (en) * 2006-07-19 2008-02-07 Rheem Australia Pty Limited Improvements in Water Heating Systems
EP2244020A2 (en) * 2009-04-16 2010-10-27 Quantex Group B.V. Device and method for providing heated water at a draw-off point
RU2664324C1 (en) * 2017-05-02 2018-08-16 Аубекир Махмутович Байрамуков Storage-demand water heater
EP3382297A1 (en) * 2015-11-27 2018-10-03 Mitsubishi Electric Corporation Hot-water supply unit and hot-water supply system
US20200173685A1 (en) 2018-10-31 2020-06-04 Darryl L. Snyder Water heating system for faucets

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200439A (en) * 1987-01-21 1988-08-03 Caradon Mira Ltd Instantaneous water heaters for showers
DE8903651U1 (en) * 1989-03-22 1989-05-11 Bosch-Siemens Hausgeräte GmbH, 8000 München Device for heating water
EP1548376A1 (en) * 2003-12-22 2005-06-29 THERMOWATT S.p.A. Post heating device for accumulator electric water heaters
AU2007203198A1 (en) * 2006-07-19 2008-02-07 Rheem Australia Pty Limited Improvements in Water Heating Systems
EP2244020A2 (en) * 2009-04-16 2010-10-27 Quantex Group B.V. Device and method for providing heated water at a draw-off point
EP3382297A1 (en) * 2015-11-27 2018-10-03 Mitsubishi Electric Corporation Hot-water supply unit and hot-water supply system
RU2664324C1 (en) * 2017-05-02 2018-08-16 Аубекир Махмутович Байрамуков Storage-demand water heater
US20200173685A1 (en) 2018-10-31 2020-06-04 Darryl L. Snyder Water heating system for faucets

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