EP3030844B1 - Procédé de gestion du chauffage d'eau dans une cuve d'un chauffe-eau - Google Patents

Procédé de gestion du chauffage d'eau dans une cuve d'un chauffe-eau Download PDF

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Publication number
EP3030844B1
EP3030844B1 EP14747611.3A EP14747611A EP3030844B1 EP 3030844 B1 EP3030844 B1 EP 3030844B1 EP 14747611 A EP14747611 A EP 14747611A EP 3030844 B1 EP3030844 B1 EP 3030844B1
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EP
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Prior art keywords
heating
tank
water
determination
temperature
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EP14747611.3A
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German (de)
English (en)
French (fr)
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EP3030844A1 (fr
Inventor
Jean-Yves Gaspard
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Winslim
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Winslim
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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
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/128—Preventing overheating
    • F24H15/132—Preventing the operation of water heaters with low water levels, e.g. dry-firing
    • 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
    • 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
    • F24H15/269—Time, e.g. hour or date
    • 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
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • 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
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • 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
    • F24H15/25—Temperature of the heat-generating means in the heater
    • 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
    • F24H2250/00—Electrical heat generating means
    • F24H2250/08—Induction

Definitions

  • the present invention relates to water heating devices otherwise called water heaters. It relates in particular to a method for managing water heating intended to prevent possible insufficient water in the water heater.
  • Water heaters are devices for heating water for different household or industrial needs.
  • the term “water heater” is understood to mean a water storage device which has at least one tank serving as a hot water storage heating body, also frequently referred to as a balloon. The water is admitted into the storage tank where it is intended to be heated there.
  • the invention relates to an electric water storage water heater.
  • the capacity of such a tank is more or less important according to the needs to which the storage devices are dedicated, for example by being associated with a sink faucet, a shower and / or a bathtub, etc.
  • an electric water heater generally has a heating device immersed in the tank serving as a heating body, making it possible to heat the water it contains.
  • the water in the tank of a water heater naturally stratifies if it is not stirred: hot water above and cold water below.
  • the temperature of the water within the heating body is, in a known manner, controlled by a sensor or a probe, said probe being immersed in the tank and preferably positioned near the water heating device.
  • the probe cannot be placed too close to the heater because in this case the probe would detect the temperature of the heater and not the temperature of the water to be heated.
  • the drawback of this probe, intended to measure the temperature of the water is that it is not configured to efficiently and above all rapidly perceive the overheating of the heating device; said device running the risk of continuing the heating until its irrevocable deterioration in the event that it cannot exchange its heat efficiently with water.
  • the problem is all the more obvious for water heaters comprising a heating device in the form of a resistance.
  • the resistors are known to have a particularly low exchange surface with water, while requiring a long time to heat the water. Consequently, it turns out to be particularly difficult to detect, finely and reactively, an overheating of the heating device. Overheating is very often detected too late resulting in irreversible damage to the water heater and the heater.
  • the overheating of the heating device is a major and known problem, due to the lack of heat exchange by the heating body, to a lack of irrigation or to excessive scaling.
  • a problem at the basis of the present invention is to provide a heating management method avoiding overheating of the heating device by detecting a probable insufficient water in the tank of the water heater.
  • This method of managing the heating of water in a tank of a water heater which comprises a device for electric heating of the water in the tank, comprises, when a water heating phase is commanded: activation of a heater by the heating device, determination of a temporal variation of temperature in the tank and a determination of at least one state of water filling of the tank as a function of the temporal variation.
  • the method according to the present invention also provides, preferably, during the heating phase: a periodic determination of a temporal variation of temperature in the tank during a predefined time interval, a determination of a state of insufficient water filling of the tank when a positive temporal variation greater than a predefined value is detected and heating is stopped following the determination of the insufficient filling state.
  • the invention also relates to a water heating system in a tank of a water heater, comprising an electric water heating device and a heating management device configured to control the activation and deactivation of the device.
  • the heating management device comprises at least one temperature measurement sensor capable of measuring a temperature in the tank and means arranged to carry out the method according to one of the preceding claims.
  • the technical effect, induced by the method and the water heating system of a water heater according to the invention, is to prevent the risks of overheating in a water heater by the detection of an insufficient level by water in the water heater tank, which may cause the water heater to malfunction.
  • the invention thus proposes a detection method that is relatively simple to set up and inexpensive making it possible to avoid, in the event of overheating of the heating device, the costs of repairing or even replacing a water heater, which proving to be be relatively high.
  • the detection of a problem, in particular an insufficient filling with water takes place after a slight heating of the device so that no risk of material damage is taken.
  • the method according to the present invention making it possible to detect insufficient water in the tank, is carried out at start-up but also during the heating period.
  • the absence of water in the tank can occur at any time, so it is advantageous that the protection is permanently active.
  • the figures 1 to 4 describe an example of a water heater comprising an electric water heater and a heater management device configured to control the activation, control and deactivation of the heater, making it possible to carry out the method according to the invention.
  • the figure 1 illustrates a cross section of a water heater 1.
  • the water heater 1 comprises a tank 2 intended to receive a volume of water and a heating device.
  • the tank 2 has, for example, a capacity greater than 10 liters, preferably greater than 20 liters.
  • the tank 2 is delimited on the one hand by a peripheral casing 3 and on the other hand by the wall 4 of a sealed sheath 5 plunging into the internal volume of the peripheral casing 3.
  • the tank has an opening 7, preferably in the form of a hatch, making it possible to insert the heating element, this heating element being able to be inserted into a sleeve which can itself be inserted through the opening 7.
  • the tank 2 comprises at one of its two longitudinal ends: a mouth 6a for water inlet intended to be heated and a mouth 6b for heated water outlet.
  • the heating device comprises at least one inductor 10 housed in the sleeve 5 and at least one load formed by at least part of the wall 4 of the sleeve 5.
  • the inductor 10 is advantageously, indirectly, a heat generator.
  • the principle of induction heating has many advantages. Induction requires a magnetic field generating an induced current in an electrically conductive part called the load and, therefore, creates heating in this load.
  • the inductor 10 can advantageously be positioned on a support 9. In a particularly advantageous manner, the support 9 simplifies the winding phase, in that it serves both to produce the inductor 10 and also to hold it in. the water heater 1.
  • the support 9 is fixedly mounted in the sleeve 5.
  • the support 9 is fixed relative to the sleeve 5 by only one of its ends located on the side of the opening 7; said opening 7 being located through the peripheral casing 3 of the water heater 1, at one of the longitudinal ends of the water heater 1.
  • the tank 2 and / or the sleeve 5 and / or the inductor 10 have cylindrical shapes.
  • the sleeve 5 and the inductor 10 have rectangular parallelepiped shapes.
  • the tank 2 takes, in a particularly advantageous manner, a rectangular parallelepiped shape so as to save space in use.
  • the water heater also comprises a heating management device comprising at least one secondary heat sleeve 8 intended to control the temperature inside the tank 2.
  • the secondary sleeve 8 may be in the form of a tube.
  • This secondary sheath 8 is preferably a small diameter sheath making it possible to receive a temperature sensor which is, for example, a temperature probe of the CTN (Negative Temperature Coefficient) type, the CTN probe being a thermistor whose resistance decreases in such a manner. uniform with temperature. It should be ensured that the thermal contact between the secondary sheath 8 and the temperature probe placed within it is correct.
  • the secondary sleeve 8 extends in the longitudinal direction of the sleeve 5.
  • the secondary sleeve 8 is located near the outer wall 4 of the sleeve 5 and, for example, less than 2 centimeters.
  • the figure 2 illustrates a cross section of the sleeve 5.
  • the wall 4 of the sleeve 5 is sealed so as to prevent water from entering the heating device.
  • the wall 4 of the sleeve 5 is advantageously formed from a steel sheet with a thickness, for example, between 0.4 millimeter (mm) and 2.3 millimeters.
  • the sheath 5 is enameled just like the interior of the tank 2; enamel hangs better on decarbonized steel. Decarburized steel is very magnetic and therefore proves to be a very good load for an induction heating system.
  • the heating power dissipates in a thickness of about 0.4 mm (induction frequency of 20 kHz) with regard to the inductor system and therefore that it is necessary that the thickness of the sheath be at less than a thickness of 0.4 mm.
  • the sleeve 5 has an access opening at one of its ends, the support 9 being inserted into the sleeve 5 by said end.
  • the secondary sleeve 8 is preferably fixed by one of its longitudinal ends on a first face of a plate 12 before being inserted into the tank 2.
  • the secondary sleeve 8 is a tube welded to the same plate as the sleeve 5. and is enameled like said sheath 5.
  • the plate 12 here has the shape of a disc.
  • the plate 12 is fixed to the outer wall of the tank 2 by means of a seal.
  • the sheath 5 comprises a base 11 fixed to one of its longitudinal ends.
  • the base 11 is preferably in the form of a disc or a square.
  • the heating device inside the sleeve 5 can be removed from the water heater by simply removing the fixing means. Exceptionally, the heating device can be checked, checked, or even changed without opening, therefore without having to empty tank 2.
  • the support 9 serves as a winding support 22.
  • the winding wire 21 22 is inserted inside the support 9 and it is crimped towards the end of the base 11.
  • the cable is then stretched.
  • wire 21 and it is passed through a slot of the support surface 13 located at one end of the support 9.
  • the support 9 can then be fixed on the winder (similar to a turn) and the winding wire 21 22 which passed through the slot of the bearing surface 13 of the support 9 is then immediately in the right place to start the winding.
  • the wire is cut and passed through the slots 19 or holding notches until it reaches the bearing surface 14 located at the other end of the support 9.
  • the support 9 comprises several slots 19. because different versions of inductors are provided depending on the power required.
  • the notches or slots 19 serve to clamp the winding wire 21 22 which is passed through the center of the support 9 to join the starting wire 21 but diametrically opposed.
  • the two wires 21 are connected to their respective connectors secured to the base 11.
  • the figure 3 illustrates a cross section of the interior of the sleeve 5 and of the secondary sleeve 8.
  • the inductor 10 comprises a coil 22 formed on the support 9.
  • the support 9 comprises a lateral outer surface provided with a winding portion 22 and a wedging portion 13.
  • the winding portion 22 is set back relative to the wedging portion 13.
  • the wedging portion comprises a bearing surface 13 on the internal wall of the sleeve 5.
  • the bearing surface 13 comprises two portions located on either side of the winding portion 22 in a longitudinal direction of the sleeve 5.
  • the recess 17 of the winding portion 22 relative to the wedging portion 13 is greater than the thickness of the winding 22.
  • the space 16 separating the coil 22 and the internal face of the wall 4 of the sleeve 5 is preferably less than 5 millimeters and, advantageously, less than 1 millimeter. Surprisingly, it is in fact advantageous for the coil 22 of the inductor 10 to be placed near the sheath 5. This promotes a concentration of the heating on a portion. only the thickness of the sheath 5. It should be noted that, surprisingly, those skilled in the art tend to move the inductor type coils away from the heated elements. This is because, as the name suggests, the heated elements heat up and tend to cause the inductor systems to heat up if they are placed too close.
  • the inductor windings are generally insulated by organic varnishes, the most efficient of which do not withstand temperatures above 220 ° C.
  • the internal wall 4 (with a thickness for example of 0.4 mm) of the sleeve 5 is advantageously heated, which heats up.
  • the sheath 5 is immersed in water with which it exchanges its heat. During the heating phase, the temperature of the sleeve 5 is therefore always higher than the temperature of the water for the exchange to take place, but the temperature difference remains low, for example 30 ° C for an injected power of 1800 Watts. (W).
  • the sleeve 5 reaches a maximum of 95 ° C and the sleeve 5 can then be considered as a cold zone for the coil 22 inductor. It is then advantageous to bring the inductor coil 22 closer to the sleeve 5 so as to cool it. This approximation is also advantageous for its construction because the coupling to the load is then increased and therefore the inductor system needs fewer ampere turns to operate correctly with its associated inverter, which increases the efficiency of the assembly and thus decreases. the cost. Finally, it should be noted that it may be necessary to interpose an additional electrical insulator around the coil 22 in the event that the distance between the coil 22 and the sheath 5 connected to earth becomes small.
  • the bearing surface 13 and the internal face of the sleeve 5 are arranged in a sliding fit. Particularly advantageously, during the insertion of the support 9 into the sleeve 5 and in use, the bearing surface 13 prevents the coil 22 from coming into contact with the internal face of the wall 4 of the sleeve 5.
  • the diameter of the bearing surface 13, 14, greater than the diameter of the winding portion 22, makes it possible, on the one hand, to protect the winding 22 and, on the other hand, to control the insertion play of the support 9 comprising the coil 22 in the sleeve 5.
  • the figure 4 illustrates a view of the support 9.
  • the support 9 is preferably in the form of a hollow tube. Particularly advantageously, the support 9 is configured so as to cooperate with the shape of the internal wall 4 of the sheath 5.
  • a first longitudinal end of the support 9 comprises a first wedging portion comprising a base 11, a bearing surface 13 , 14 and at least one slot 19 for retaining the winding wire 21 22.
  • a second longitudinal end of the support 9, opposite the first, comprises a bearing surface 13, 14 and at least one slot 19 for retaining the winding wire 21 22.
  • the bearing surface 13, 14 comprises, in a particularly advantageous manner, a plurality of crenellated peaks formed on an annular portion of the wedging portion.
  • the crenellations allow a balance of the support 9 within the sheath 5. They also limit the phenomena of hyperstatism during insertion.
  • the crenellations advantageously allow a simplification of the coil 22.
  • an inductor coil 22 of the Pan Cake type will preferably be used, without resorting to the use of a support. 9.
  • the wall of the support 9 is perforated so as to promote heat transfer within the sleeve 5, to minimize the weight of the support 9 and therefore its cost.
  • the support 9 is formed of materials resistant to high temperatures such as plastics (for example, BMC “Bulk Molding Compound” comprising Polyester resin or the Vinylester) reinforced with glass fibers.
  • plastics for example, BMC “Bulk Molding Compound” comprising Polyester resin or the Vinylester
  • the support 9 is advantageously hollow and its center can allow the passage of the winding wire 21 22.
  • the figure 5 illustrates a schematic representation of the various steps of the process according to the invention with respect to time t and temperature variables T.
  • the various phases presented are only examples of situations that may occur.
  • the temperature variations are illustrated as being linear, but only to simplify the representation of the principle of the invention, these variations being able to have other forms of curves.
  • the heating management device comprises at least one secondary temperature measuring sleeve 8 capable of measuring a temperature in the tank 2 and means arranged to carry out the method.
  • the secondary sheath 8 is advantageously equipped with a temperature probe. This probe is preferably brought into abutment in the secondary sheath 8.
  • the data measured by the sensor are advantageously transmitted to means arranged to carry out the method of the invention.
  • these means comprise a microprocessor or a microcontroller, and are capable of recovering the data, analyzing them and then transmitting control information, for example stopping or continuing heating to the heating device of the water heater.
  • These means can include any electronic component such as PLC systems, memories, interfaces for receiving and acquiring data, for example temperature, and control, as well as instructions that can be executed by at least one processor to implement the method presented here.
  • a first step at a time t 0 consists in activating heating by the heating device, after having previously recorded the initial temperature T 0 in the tank 2.
  • the heating device comprises an inductor 10.
  • the heating activation begins, preferably, with a phase whose energy is limited so as not to damage the heating element and its environment in the event that the tank 2 is either in lack of water, or very strongly. scaled.
  • a phase whose energy is limited so as not to damage the heating element and its environment in the event that the tank 2 is either in lack of water, or very strongly. scaled.
  • the duration of the test phase is, for example. example, 1 minute.
  • the device automatically stops the time to study the temperature behavior of the tank 2.
  • the heating is preferably carried out at a power of less than 1500 kW. The heating device has thus generated heat in the sleeve 5.
  • a temporal variation in temperature in the tank 2 is determined.
  • the term “temporal variation” is understood to mean the time derivative, ie the ratio of the difference between a temperature measured when the heating is activated and a temperature after a predefined duration, and of the predefined duration.
  • the predefined duration is preferably between 2 and 4 minutes. Nevertheless, shorter durations are possible (it depends on the energy injected, the mass and the geometry of the different elements), until an instantaneous variation is determined, at the temperature data acquisition frequency. .
  • the predefined value D 1 represents an average value of temperature variation between the instant t 0 and the time t 1 , following a given phase having generated an input of heat.
  • the value D 1 advantageously represents a ratio of a temperature difference measured between two times, and more precisely of a thermal limit corresponding to the passage from water to air.
  • the main sleeve 5 heats up quickly and transmits its heat to the secondary sleeve 8 very close, for example located 6 mm from the sleeve 5.
  • the energy supplied is not sufficient to significantly increase the temperature of the water and therefore the change in temperature is low.
  • the sleeve 5 is submerged, not risking damage to the water heater 1.
  • the possible deterioration could concern the heating element but also the enamel of the sleeve 5 and the thermal insulation of the tank 2. In the event that the heating element is changed , the water heater would then operate with reduced performance. One could observe an oxidation, a shrinkage of the enamel as well as a deterioration of the thermal insulation of the tank 2.
  • the time interval between t 1 and t 2 corresponds to a waiting time which is not significant in view of the time required for heating the water in tank 2.
  • the figure 5 shows the case where the tank 2 is filled with water.
  • the entry of water, generally cold, into the tank 2 will cause a significant thermal variation on the sleeve 5 as well as on the secondary sleeve 8 including a temperature probe.
  • a second determination of a temporal variation in temperature is carried out, followed by a second determination of a state of water filling of the tank comprising the determination of a state of filling sufficient to determine a negative temporal variation less than a predefined value D 2 .
  • This value reveals a limit variation reflecting an admission of cold water.
  • the time variation that is to say the time derivative
  • the time variation is noted as being negative, corresponding to a decrease in the temperature inside the tank 2 in the time interval t 2 and t 3 .
  • a heating phase is carried out.
  • a periodic determination of a temporal temperature variation in the tank 2 is first carried out during a predefined time interval, for example between t 3 and t 4 . If the temporal variation measured at this instant is positive less than a predefined value D 3 then the filling state of the tank 2 is considered sufficient, the process of heating the water in the tank 2 continues.
  • This phase is similar to the heating activation phase carried out at the start of the process, from time t 0 .
  • the power can advantageously be increased so as to heat the water in tank 2 more quickly. It is thus possible, for example, to put in low-level test mode heating power and one or more higher values in effective heating mode when the tests are successful.
  • the temporal temperature variation control steps are repeated several times, or even periodically and continuously, during the heating phase so as to check the sufficiency of the water level present in the tank 2. If, during these checks, a positive temporal variation greater than a predefined value is detected, this means that the water filling state of the tank 2 is insufficient, the heating device is then stopped.
  • the method according to the invention therefore makes it possible to detect and prevent possible overheating problems, very frequently caused by insufficient of water filling of the heating body 2.
  • This insufficiency is understood in particular to an empty tank 2 but also of a partially filled tank 2, below a predefined filling rate.
  • the method according to the present invention can advantageously make it possible to detect scaling of the heating element.
  • the heating device automatically stops the time to study the temperature behavior of the tank 2, the heating device having generated heat in the sleeve 5.
  • the heating time may vary and have a duration different from that foreseen during the heating test phase. Consequently, the temperature behavior will be different depending on whether the sleeve 5 is immersed in water (tank 2 full), in air (tank 2 empty) or even whether the sleeve 5 is scaled.
  • the temperature sensor advantageously located in the secondary sheath 8 will determine whether there is a presence of water in the tank 2 or else if there is severe scaling of the heating element. In the event that the heating element is heavily scaled, the main sleeve will not heat up quickly. The energy supplied is not sufficient to significantly increase the temperature of the water and therefore the change in temperature is very low.
  • an alert signal can be triggered in order to warn the user of any scaling of the heating element.
  • the user would have the choice of descaling the device in order to avoid incurring significant replacement or repair costs.
  • an alternative would be to reduce the heating power to protect the heating element and its environment. In a particularly advantageous manner, these various actions can be controlled by a microprocessor.
  • test phases of the invention can be done without high production of heating energy and therefore without risk of material degradation and low consumption of electrical energy.

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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)
  • Computer Hardware Design (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Cookers (AREA)
EP14747611.3A 2013-08-09 2014-07-31 Procédé de gestion du chauffage d'eau dans une cuve d'un chauffe-eau Active EP3030844B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1357935A FR3009609B1 (fr) 2013-08-09 2013-08-09 Procede de gestion du chauffage d'eau dans une cuve d'un chauffe-eau
PCT/EP2014/066492 WO2015018733A1 (fr) 2013-08-09 2014-07-31 Procédé de gestion du chauffage d'eau dans une cuve d'un chauffe-eau

Publications (2)

Publication Number Publication Date
EP3030844A1 EP3030844A1 (fr) 2016-06-15
EP3030844B1 true EP3030844B1 (fr) 2021-09-08

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EP14747611.3A Active EP3030844B1 (fr) 2013-08-09 2014-07-31 Procédé de gestion du chauffage d'eau dans une cuve d'un chauffe-eau

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US (1) US10060650B2 (zh)
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Publication number Publication date
FR3009609B1 (fr) 2018-11-23
CN105659036B (zh) 2019-12-03
US10060650B2 (en) 2018-08-28
FR3009609A1 (fr) 2015-02-13
CN105659036A (zh) 2016-06-08
EP3030844A1 (fr) 2016-06-15
US20160187027A1 (en) 2016-06-30
WO2015018733A1 (fr) 2015-02-12

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