EP1794496A2 - Accumulator water heater, flange for accumulator water heater and control method for water heater scaling - Google Patents
Accumulator water heater, flange for accumulator water heater and control method for water heater scalingInfo
- Publication number
- EP1794496A2 EP1794496A2 EP05805063A EP05805063A EP1794496A2 EP 1794496 A2 EP1794496 A2 EP 1794496A2 EP 05805063 A EP05805063 A EP 05805063A EP 05805063 A EP05805063 A EP 05805063A EP 1794496 A2 EP1794496 A2 EP 1794496A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- water heater
- heating
- speed
- proximity
- 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- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 68
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 50
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 50
- 239000004571 lime Substances 0.000 claims abstract description 50
- 239000000779 smoke Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- 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
- F24H9/2021—Storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
- F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/223—Temperature of the water in the water storage tank
- F24H15/225—Temperature of the water in the water storage tank at different heights of the tank
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/281—Input from user
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/288—Accumulation of deposits, e.g. lime or scale
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/395—Information to users, e.g. alarms
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/486—Control of fluid heaters characterised by the type of controllers using timers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/212—Water-boiling vessels, e.g. kettles with signaling means, e.g. whistling kettles
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/54—Water boiling vessels in beverage making machines
- A47J31/56—Water boiling vessels in beverage making machines having water-level controls; having temperature controls
Landscapes
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Farming Of Fish And Shellfish (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The present invention relates to a water heater (1), preferably of the accumulator type, comprising a water heating means (4) and a sheath (5) containing one or more sensors, conceived to measure the temperature of the water in proximity to said water heating means (4), characterised in that it comprises means (6) for reading the presence of lime scaling on said water heating means (4), said reading means (6) using the temperature information of said sensor/s (5) during the heating stage of said means (4); also included in the description is a flange (3) for a water heater and a method for controlling the forming of lime scaling.
Description
ACCUMULATOR WATER HEATER, FLANGE FOR ACCUMULATOR WATER HEATER AND CONTROL METHOD FOR WATER HEATER SCALING
DESCRIPTION
The present invention relates to a water heater, preferably of the electric accumulator type, a flange for said water heater, and a control method for lime scaling on the water heating means in a water heater, and the use of temperature sensors to reveal the presence of lime scaling on the water heating means of a water heater. The present invention is also applied to a gas fired accumulator water heater, or at least, to those models wherein the water is heated by means of a smoke flue positioned inside the same accumulator tank.
Hereafter in the following description for easier comprehension, reference will be made only to electric water heaters, keeping in mind that all aspects that refer to the electric resistance also apply in the same manner to the smoke flue, at least according to the description above.
Currently known electric water heaters generally comprise a tank and a removable flange mounted -with one or more resistances, a sheath containing one or more thermostat sensors and an anti-corrosion device. Among the most common thermostats currently on the market, the most widely used is the so-called "rod type" followed by the so-called "bulb type", both with electromechanical action, but electronic thermostats are also used, where the sensor is generally an NTC. Even though electronic sensors are more expensive, they have the advantage of being able to control the temperature with very high precision, and with only a small extra
cost and appropriate electronic logic, they can perform other supplementary functions such as a timing or water temperature signal transmission.
In the case where the electronic thermostat is equipped with at least two sensors positioned at a sufficient distance from each other along the vertical line, it is also possible to obtain information concerning the contents of the heated water in an accumulator water heater, as is common knowledge because of products distributed on the market in recent years.
Currently known water heaters on the market present reliability problems over a certain period of time. In particular, the lime that deposits progressively on the heating resistances gradually touches and encases the sheath of the thermostat sensor(s), reducing the effect of the thermal contact between the sensors and the heated water, and creating a thermal bridge between the heating resistance and the sheath.
This provokes errors in measuring the water temperature. In fact the thermal bridge permits the temperature sensor to heat more rapidly in comparison to the volume of water in the tank thus providing a water temperature reading higher than the actual temperature.
Moreover, when lime builds up around the resistance, this causes excessive heating, the noise effects typical of surface water boiling, and leads to rapid deterioration. Current state of the art does not include any devices able to signal excessive lime scaling on the electric resistances.
In order to control the lime scaling on electric resistance, regular control checks must be made, disassembling the flange on the water heater.
These regular control operations lead to a considerable increase in the cost of running and maintenance of the said water heaters.
The task of the present patent is to eliminate at least part of the problems involved currently present on water heaters, and in particular those problems described above.
In particular, the task of the present patent is to identify means and methods able to rapidly signal the forming of lime scaling. Said task is achieved by means of the water heater according to the description
provided in claim 1, a water heater flange according to the description provided in claim 11 , and a method for controlling the forming of lime scaling according to the description provided in claims 19, 23 and 27.
Further advantages can also be obtained by means of the supplementary characteristics described in the subordinate claims.
A possible embodiment of the invention according to the claims of the patent is described below with reference to the appended drawings wherein:
Figure 1 shows a front view of a cross section of an electric water heater;
Figure 2 shows a partial front view of a cross section of a flange for a water heater according to a first embodiment;
Figure 3 shows a partial front view of a cross section of a flange for a water heater according to a second embodiment;
Figure 4 shows the layout diagram of an algorithm for calculating the temperature gradient; - Figure 5 shows a graph of the temperature progression, in absence of lime and after 27 days' use, respectively, according to a first embodiment;
Figure 6 shows a graph of the temperature progression, in absence of lime according to a second embodiment;
Figure 7 shows a graph of the temperature progression, after 130 days of water heater use, according to a second embodiment
In the appended drawings, the numeral 1 refers throughout to a water heater, preferably of the electric accumulator type, comprising a tank 2 and a flange 3 that is mounted with one or more electric resistances 4, a sheath 5 containing one or more sensors 6.1 or 6.2 and 6.3 conceived to read the temperature of the water in the tank, and to transmit signals to a means 6 (typically an electronic device), and lastly preferably a means against corrosion 7.
According to the present invention, the presence of lime scaling on the electric resistance 4 during the heating stage is read by using the temperature information tό.l, or t6.2 and t6.3 from the said sensors 6.1 or 6.2 and 6.3, respectively. Advantageously, said sensors 6.1 or 6.2 and 6.3 are the same as those used by the
water heater thermostat, which must be electronic in this case; even more advantageously, a single electronic device can be foreseen which, as well as performing known functions such as thermostatation and/or calculating the amount of hot water and/or signalling the temperature of the water, is also able to signal the forming of lime scaling, according to the invention.
According to a first embodiment, shown in figure 2 and in the layout diagram in figure 4, a single temperature sensor 6.1 is foreseen, positioned in proximity to the resistance 4. It must be noted that the term "in proximity" must be understood as being that the distance of the temperature sensor 6.1 from the resistance 4 is such that it is covered by the lime scaling that has begun to form, before it has reached a thickness that will provoke irreversible damage, according to the judgement of the technicians expert in this sector. As an example, in water heaters for domestic use, said distance is less than 60 mm, and more preferably, less than 50 mm and, even more preferably, less than 40 mm. Preferably the sensor 6.1 is positioned at a height less than the maximum height of the electric resistance 4; however, it can also be positioned at a height above the resistance 4, on condition that it can be reached by the lime scaling as it is formed, before it provokes irreversible damage. As will be explained in more detail further on, the temperature information t6.1 read by sensor 6.1 can be compared in relation to the thickness of the lime scaling which forms on the electric resistance 4.
For this purpose, the means 6 comprise a calculating means 6.4 (analog or digital) conceived to determine the speed of the heating of the water GIf in proximity to the resistance 4, and to compare said heating speed with a reference value.
Preferably said reference value is based in relation to the reference heating speed Gl0 which corresponds with the heating speed that can be observed in the absence of lime or with very low lime scaling levels. The reference heating speed Gl0 depends on the type of water heater, and in particular, on the installed power and on the geometry.
Each time the heating speed GIf exceeds the reference speed Gl0 by a certain threshold ΔG, the lime scaling is considered as being strong enough to require maintenance operations.
The faster the measured speed, the greater the difference between the temperature value t6.1 measured by the temperature sensor 6.1 located in proximity to the electric resistance 4, and the actual temperature of the water in the water heater.
The increase in lime scaling is therefore calculated by measuring the actual heating speed GIf in proximity to the resistance 4 during the first minutes of heating and comparing this value with the reference value Gl0, which corresponds with the heating speed that is observed in the absence of lime or when the lime scaling is very slight.
An example of the temperature progression read by a probe in proximity to the electric resistance in the absence of lime scaling and after 27 days' water heater use is shown in figure 5. After the water heater has been used, and consequently, once the lime has deposited on the electric resistance, the heating speed is subject to increase.
Preferably other means are also foreseen to memorise and/or adjust the reference speed Gl0 permitting the user to pre-set or modify said speed.
The reference speed Gl0 can also be self-taught, by providing for means that permit the memorising of the reference signal GIo during initial installation.
The value of the threshold ΔG depends on the model of the water heater used, it can be pre-set or modified during use, and for the more common models, it has a value of between 3 and 5 °C/minute.
According to a preferred operating mode, the heating speed is measured in a predetermined interval of time that does not exceed 5 minutes, or until the water temperature has reached 30 °C.
In fact the main differences between the heating curves with and without the presence of lime stratification read up to temperatures of about 30°C, which are generally reached within a period under 5 minutes. Visual and/or acoustic signals are also foreseen to warn when the heating speed GIf
in proximity to the resistance exceeds by a certain threshold ΔG the pre-established reference speed Gl0, or, in other words, when the lime scaling is great enough to require maintenance operations.
According to a second alternative embodiment, as shown in figure 3 and in the layout diagram in figure 4, the water heater is equipped with a first sensor 6.2, located in proximity to the resistance 4, and a second temperature sensor 6.3, positioned at a certain distance from resistance 4.
The first sensor 6.2, conceived to measure the temperature T1, is positioned inside the heating zone, or inside the zone slightly above said heating area, under the same conditions as those described for the first embodiment.
The second sensor 6.3 is positioned at a certain distance from the electric resistance in a position to be able to measure the actual temperature T2 of the volume of the heated water even in the presence of lime.
For this purpose, the second sensor 6.3 is positioned generally at least 100 mm, and preferably at least 150mm from the resistance 4.
The temperature gradient Ti-T2 read by the pair of sensors 6.2 and 6.3 can be compared in relation to the thickness of the lime scaling.
Figures 5 and 6 show examples of the temperature progression read by the two temperature probes and the temperature gradient progression T1-T2, respectively, when the resistor is in new condition, and after 130 days use.
After the water heater has been in use, and consequently also as a result of the accumulated lime scaling on the resistance, the temperature gradient Tj-T2 will be subject to an increase.
For this purpose, the means 6 comprise calculation means 6.4 (analog or digital) conceived to measure the temperature gradient Ti-T2 of the water, in proximity to the two sensors at exactly the same time and to compare this with a reference gradient
ΔT0.
The reference gradient ΔT0 depends on the type of water heater, and in particular on the installed power and on the geometry, and is defined in relation to a condition where no or very little lime is present.
For more common models the reference gradient ΔT0 ranges between 20 and 30 °C.
Preferably means are also provided for memorising and/or adjusting the reference gradient ΔTo that permits the user to pre-set and/or modify said gradient.
The reference gradient ΔT0 can also be self-taught, providing for means that permit memorising the reference during the initial installation.
Each time the measured temperature gradient Tj-T2 exceeds the pre-established reference value ΔT0; the lime scaling is considered as great enough to reduce the efficiency of the water heater and therefore the water heater requires maintenance operations. Preferably the temperature gradient is measured during the whole heating period, and even more preferably, within a heating time no greater than 5 minutes, or within a time that corresponds with a temperature, at the resistance 6.2, that is not higher than
30 0C.
If the value of the reference gradient ΔT0 is exceeded, the presence of excessive lime scaling is signalled by means of visual and/or acoustic signals.
Indicators can be provided to show how the heating speed or the heating gradient varies in time, to permit the user to control the presence of lime scaling on the electric resistance.
As well as the visual and/or acoustic signal warnings, the water heater can also be provided with a system to turn to switch-off.
In both embodiments it is possible to perform a specific control operation to check the amount of lime scaling.
This operation foresees the heating of the electric resistance for a sufficient period of time in order to calculate the heating speed or the temperature gradient, and to compare it with the reference values.
Preferably the heating time will be less than 5 minutes.
Advantageously, the water heater can also be equipped with remote control transmission means to send a signal for lime scaling readings.
It must be remembered that for water heaters which are already equipped with a thermostat/electronic device with the additional functions described in the
introduction (timer, hot water volume reading, etc), the invention basically applies without any extra cost, apart the upgrading of the calculation capacity and the signal/activation means output.
Claims
Claim 1. Water heater (1), preferably the accumulator type, comprising a water heating means (4) and a sheath (5) containing one or more sensors, conceived to measure the water temperature in proximity of said water heating means (4), characterised in that it comprises a means (6) for reading the presence of lime scaling on said water heating means (4), said reading means (6) using the temperature information of said sensor/s during the heating stage of said means (4).
Claim 2. Water heater (1), according to claim 1, characterised in that said water heating means (4) comprise at least one electric resistance.
Claim 3. Water heater (1), according to claim 1, characterised in that said water heating means (4) comprise at least one smoke flue.
Claim 4. Water heater (1), according to claim 1 or 2 or 3, characterised in that said means (6) comprise a temperature sensor (6.1) positioned in proximity to said water heating means (4) and calculating means (6.4) conceived to measure the heating speed of the water (GIf) in proximity to the water heating means (4) and to compare said heating speed (GIf) with a reference value.
Claim 5. Water heater (1), according to claim 4, characterised in that it comprises means for memorising and/or adjusting said reference value.
Claim 6. Water heater (1), according to claim 4 or 5, characterised in that said reference value is equal to the sum of a reference speed (Gl0), that corresponds with the heating speed when no lime scaling is present, plus a threshold value (ΔG).
Claim 7. Water heater (1), according to claim 6, characterised in that said threshold value (ΔG) ranges between 3 and 20 °C/minute.
Claim 8. Water heater (1), according to claim 1 or 2 or 3, characterised in that said means (6) comprise a first sensor (6.2) positioned in proximity to said water heating means (4), a second temperature sensor, positioned at a certain distance from said water heating means (4) and calculating means (6.4) conceived to measure the temperature gradient (Ti-T2) inside the tank between said point in proximity to the water heating means (4) and said point at a certain distance from said water heating means (4) and to compare said gradient (T1-T2) with a reference value.(ΔT0).
Claim 9. Water heater (1), according to claim 8, characterised in that it comprises means for memorising and/or adjusting said reference gradient (ΔTo).
Claim 10. Water heater (1), according to claim 8 or 9, characterised in that said reference gradient (ΔT0) ranges between 20 and 30 °C.
Claim 11. Flange (3) for a water heater comprising at least one electric resistance (4) and a sheath (5) containing one or more sensors, conceived to measure the temperature of the water in proximity to said resistance (4), characterised in that it comprises means (6) for reading the presence of lime scaling on said electric resistance (4), said reading means (6) using the temperature information of said sensor/s during the heating stage of said resistance (4).
Claim 12. Flange (3) for a water heater, according to claim 11, characterised in that said means (6) comprise a temperature sensor (6.1) positioned in proximity to said electric resistance (4) and calculating means (6.4) conceived to measure the heating speed of the water (GIf) in proximity to the resistance (4) and to compare said heating speed to a reference value.
Claim 13. Flange (3) for a water heater, according to claim 12, characterised in that it comprises means for memorising and/or adjusting said reference value.
Claim 14. Flange (3) for a water heater, according to claim 12 or 13, characterised in that said reference value is equal to the sum of a reference speed (GIo), that corresponds to the heating speed when no lime scaling is present, plus a threshold value (ΔG).
Claim 15. Flange (3) for a water heater, according to claim 14, characterised in that said threshold value (ΔG) ranges between 3 and 20 °C/minute.
Claim 16. Flange (3) for a water heater, according to claim 11, characterised in that said means (6) comprise a first sensor (6.2) positioned in proximity to said electric resistance (4), a second temperature sensor, positioned at a certain distance from said electric resistance (4) and calculating means (6.4) conceived to measure the temperature gradient (Ti-T2) between said point in proximity to the resistance (4) and said point at a certain distance from said resistance (4) and to compare said gradient (Ti-T2) with a reference gradient (ΔT0).
Claim 17. Flange (3) for a water heater, according to claim 16, characterised in that it comprises means for memorising and/or adjusting said reference gradient (AT0).
Claim 18. Flange (3), according to claim 16 or 17, characterised in that said reference gradient (ΔT0) ranges between 20 and 30 0C.
Claim 19. Method for controlling the forming of lime scaling on water heating means (4) for a water heater (1) comprising the following stages:
- feeding the water heating means (4) for a pre-set period of time;
- measuring the heating speed of the water (GIf), in a zone in proximity to said water heating means, in said pre-set period of time;
- comparing the heating speed measured in this manner (GIf) with a reference heating speed (GIo);
- sending a warning signal when the measured heating speed (GIf) exceeds the reference speed (G I0) by a certain threshold (ΔG) .
Claim 20. Method for controlling the forming of lime scaling, according to claim 19, also comprising the following stages:
- pre-setting, modifying or self-teaching of said reference speed (Gl 0);
- pre-setting or modifying said threshold value (ΔG).
Claim 21. Method for controlling the forming of lime scaling, according to claim 19 or 20, wherein said pre-set time is less than or equal to 5 minutes.
Claim 22. Method for controlling the forming of lime scaling, according to claim 19 or 20 or 21, wherein said threshold value (ΔG) ranges between 3 and 20 °C/minute.
Claim 23. Method for controlling the forming of lime scaling on a water heating means (4) for a water heater (1), comprising the following stages: - heating the water up to a pre-set temperature;
- measuring the heating speed of the water (GIf), in a zone in proximity to a said water heating means (4), during the heat-up stage;
- comparing the measured heating speed (GIf) with the reference heating speed (Gl0);
- sending a warning signal when the measured heating speed (GIf) exceeds the reference speed (GIo) by a certain threshold (ΔG).
Claim 24. Method for controlling the forming of lime scaling, according to claim 23, also including the following stages: - pre-setting, modifying or self-teaching of said reference speed (Gl o);
- pre-setting or modifying said threshold value (ΔG).
Claim 25. Method for controlling the forming of lime scaling, according to claim 23 or 24, wherein said pre-set temperature is lower than or equal to 30 0C.
Claim 26. Method for controlling the forming of lime scaling, according to claim 23 or 24 or 25, wherein said threshold value (ΔG) ranges between 3 and 20
°C/minute.
Claim 27. Method for controlling the forming of lime scaling on water heating means (4) for a water heater (1) comprising the following stages:
- heating the water for a pre-set period of time; - measuring the temperature gradient T1-T2, between a point in proximity to a point at a certain distance from said water heating means (4), after said pre-set time;
- comparing said temperature gradient T1-T2 with a reference gradient (ΔT0); - sending a warning signal when the measured temperature gradient is higher than the reference gradient (ΔT0).
Claim 28. Method for controlling the forming of lime scaling, according to claim 27, also comprising the stage of pre-setting, modifying or self-teaching said reference gradient (ΔTo).
Claim 29. Control method, according to claim 27 or 28, wherein said pre-set time is less than or equal to 5 minutes.
Claim 30. Control method, according to claim 27 or 28 or 29, wherein said reference gradient (ΔTo) ranges between 20 and 30 0C.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000046A ITAN20040046A1 (en) | 2004-10-01 | 2004-10-01 | WATER HEATER WITH ACCUMULATION, FLUSH FOR WATER HEATER WITH ACCUMULATION, METHOD OF CHECKING THE WATER SCREENINGS, AND USE OF TEMPERATURE SENSORS TO CHECK THE SCALE OF CALCARE OF A WATER HEATER |
PCT/IB2005/003011 WO2006038109A2 (en) | 2004-10-01 | 2005-09-16 | Accumulator water heater, flange for accumulator water heater and control method for water heater scaling |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1794496A2 true EP1794496A2 (en) | 2007-06-13 |
Family
ID=36096437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05805063A Withdrawn EP1794496A2 (en) | 2004-10-01 | 2005-09-16 | Accumulator water heater, flange for accumulator water heater and control method for water heater scaling |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1794496A2 (en) |
CN (1) | CN101069038B (en) |
IT (1) | ITAN20040046A1 (en) |
RU (1) | RU2419028C2 (en) |
WO (1) | WO2006038109A2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007028175A1 (en) * | 2005-09-02 | 2007-03-08 | Andre Meinhard Fourie | A heating device |
DE102009001557A1 (en) * | 2009-03-13 | 2010-09-23 | BSH Bosch und Siemens Hausgeräte GmbH | Hot water tank with sensor system |
CN102607163B (en) * | 2012-03-31 | 2013-11-27 | 法罗力热能设备(中国)有限公司 | Quick-heating energy-saving electric water heater |
CN104422137B (en) * | 2013-08-22 | 2017-03-29 | 珠海格力电器股份有限公司 | Water heater preengages heat-production control method and system |
DE102013114385A1 (en) * | 2013-12-18 | 2015-06-18 | Endress + Hauser Wetzer Gmbh + Co. Kg | Heating element for firing on heating or steam boilers |
US10151475B2 (en) | 2014-08-19 | 2018-12-11 | Intel Corporation | System for determining scaling in a boiler |
US11441815B2 (en) | 2020-04-15 | 2022-09-13 | Rheem Manufacturing Company | Systems and methods for heater control in fluid heating systems |
CN113587453B (en) * | 2021-07-31 | 2022-03-22 | 江苏维德锅炉有限公司 | Solar water heater with efficient heat-collecting and heat-preserving functions |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60202257A (en) * | 1984-03-27 | 1985-10-12 | Matsushita Electric Ind Co Ltd | Control circuit of hot water supplier |
JPH01102395A (en) | 1987-10-16 | 1989-04-20 | Toshiba Corp | Sludge height measurement on steam generator tube plate |
GB2269466B (en) * | 1992-08-08 | 1996-01-24 | Caradon Mira Ltd | Improvements in or relating to instantaneous water heaters |
ITPD980079A1 (en) * | 1998-04-02 | 1999-10-02 | Carel Srl | DEVICE FOR DETECTION OF THE THICKNESS OF SCRATCHES ON THE RESISTIVE ELEMENTS OF STEAM GENERATORS WITH ELECTRIC RESISTANCE |
DE19960497A1 (en) | 1999-12-15 | 2001-06-21 | Bsh Bosch Siemens Hausgeraete | Container for heating water |
GB2358971B (en) * | 2000-02-01 | 2005-02-23 | Strix Ltd | Electric heaters |
GB2404293B (en) | 2000-02-01 | 2005-03-02 | Strix Ltd | Electric heaters |
CH691948A5 (en) * | 2000-06-28 | 2001-12-14 | V Zug Ag | Boiler for steam generator in steam cooking unit, comprises sensors for measuring water and heating element temperatures, and lime scale detection unit utilizing signals from these sensors |
-
2004
- 2004-10-01 IT IT000046A patent/ITAN20040046A1/en unknown
-
2005
- 2005-09-16 RU RU2007113010/06A patent/RU2419028C2/en not_active IP Right Cessation
- 2005-09-16 WO PCT/IB2005/003011 patent/WO2006038109A2/en active Application Filing
- 2005-09-16 EP EP05805063A patent/EP1794496A2/en not_active Withdrawn
- 2005-09-16 CN CN2005800412335A patent/CN101069038B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006038109A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006038109A3 (en) | 2006-07-13 |
ITAN20040046A1 (en) | 2005-01-01 |
CN101069038A (en) | 2007-11-07 |
CN101069038B (en) | 2010-08-25 |
RU2007113010A (en) | 2008-11-10 |
RU2419028C2 (en) | 2011-05-20 |
WO2006038109A2 (en) | 2006-04-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2006038109A2 (en) | Accumulator water heater, flange for accumulator water heater and control method for water heater scaling | |
JP4785927B2 (en) | Electric kettle control method | |
US8770152B2 (en) | Water Heater with partially thermally isolated temperature sensor | |
CN1134565C (en) | Steam iron with calcification indication | |
US7654733B2 (en) | Method and device for identifying a temperature sensor connected to a control unit | |
CN1135461C (en) | Heating vessel and method of controlling heating element of such vessel | |
CN100413442C (en) | Electric heater | |
CN101763127B (en) | Control method of pressure cooker | |
US20080281763A1 (en) | Device and a Method for Measurement of Energy for Heating Tap Water Separated from the Buildings Heating Energy-Usage | |
EP3616023B1 (en) | Method for determining an amount of deposition of scale on a heating element and household appliance comprising a heating element | |
EP0187629B1 (en) | A method of controlling the heating of an aqueous load in a cooking utensil | |
GB2518365A (en) | Apparatus and method for volumetric estimation of heated water | |
CN105326386A (en) | Water temperature boiling point judging method and device and electric kettle | |
CN101637062A (en) | Method for generating processing and analysing a signal correlated to temperature and corresponding device | |
CN205197768U (en) | Device and electric kettle are judged to temperature boiling point | |
CN101006899A (en) | Temperature sensing circuit in cooking appliance and controlling method of the same | |
US7015433B2 (en) | Temperature calibration method for a cooking appliance | |
CN105385843B (en) | A kind of hot rolling slab method for heating and controlling based on the last temperature of section | |
US20160187898A1 (en) | Compensating for Sensor Thermal Lag | |
NZ579929A (en) | Improvements in water heaters | |
WO2008084217A1 (en) | Boiler performance indicator | |
JP6022623B2 (en) | Thermal conductivity estimation system, method and program, and thermal conductivity test apparatus | |
JP2525605B2 (en) | Automatic japot | |
JPH0257412B2 (en) | ||
CN110017613B (en) | Method for forecasting remaining bath time of water storage type water heater |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20070413 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ARISTON THERMO S.P.A. |
|
17Q | First examination report despatched |
Effective date: 20130402 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20160401 |