EP2298963A2 - Container boiler with double cathodic protection - Google Patents

Container boiler with double cathodic protection Download PDF

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Publication number
EP2298963A2
EP2298963A2 EP10175913A EP10175913A EP2298963A2 EP 2298963 A2 EP2298963 A2 EP 2298963A2 EP 10175913 A EP10175913 A EP 10175913A EP 10175913 A EP10175913 A EP 10175913A EP 2298963 A2 EP2298963 A2 EP 2298963A2
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EP
European Patent Office
Prior art keywords
anode
water heater
sacrificial
sacrificial anode
current
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.)
Granted
Application number
EP10175913A
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German (de)
French (fr)
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EP2298963B1 (en
EP2298963A3 (en
Inventor
Bertrand Retiere
Cédric Geoffroy
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Compagnie Industrielle des Chauffe Eau SA CICE
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Sate
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Priority to PL10175913T priority Critical patent/PL2298963T3/en
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Publication of EP2298963A3 publication Critical patent/EP2298963A3/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/18—Means for supporting electrodes
    • 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
    • F24D19/0092—Devices for preventing or removing corrosion, slime 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
    • 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
    • F24H9/40—Arrangements for preventing corrosion
    • F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
    • F24H9/455—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means for water heaters
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/20—Constructional parts or assemblies of the anodic or cathodic protection apparatus
    • C23F2213/21—Constructional parts or assemblies of the anodic or cathodic protection apparatus combining at least two types of anodic or cathodic protection

Definitions

  • the invention relates to an electric storage water heater with double cathodic protection.
  • cathodic protections Two types of cathodic protections are known to ensure the protection of an electric water heater with corrosion accumulation: either cathodic protection using a sacrificial anode such as a magnesium anode, or cathodic protection using a fixed current permanent anode.
  • the magnesium anode needs to be replaced periodically when it reaches the end of consumption, while the anode with imposed current requires to be constantly supplied by a power source to provide cathodic protection.
  • the document WO 2007/010 335 describes an electric storage water heater with adjustable cathodic protection.
  • This electric storage water heater is protected against corrosion under normal conditions of operation and power supply by a fixed current permanent electrode, while the water heater is protected in the absence of power supply by a sacrificial anode .
  • the sacrificial anode is electrically connected to the tank of the water heater by a switch for interrupting the electrical connection when the power supply supplies said permanent current electrode.
  • This device is generally satisfactory, but in fact requires disconnecting the sacrificial anode in case of power supply, to avoid excessive consumption.
  • a first object of the invention is to improve the state of the prior art, by proposing a new electric water heater storage double cathodic protection, not requiring to disconnect the sacrificial anode in case of power supply while by avoiding excessive consumption.
  • a second object of the invention is to provide the cathodic protection of an electric storage water heater, even using a system of feeding off-peak hours involving a lack of power for long periods of the order of 16 hours.
  • the invention relates to a storage water heater with double cathodic protection, comprising a sacrificial anode and an anode with an imposed current, characterized in that the sacrificial anode surrounds the anode with an imposed current and has a conformation capable of avoid any contact of the imposed current anode with the water of the tank of the electric water heater, before consumption of the sacrificial anode.
  • an electric storage water heater generally designated by (1) comprises a vessel of a holding sheath (3), a voltage generator (4), a sacrificial anode (5), an imposed current anode (6) .
  • the cathodic polarization electrical circuit comprises the sacrificial anode (5) in electrical contact with the imposed current anode (6) made for example of titanium.
  • the magnesium sacrificial anode (5) and the titanium imposed anode (6) are mounted on the holding sheath (3) by means of one of the insulating holding means (7) and (8) which are described in detail with reference to the figure 2 .
  • An isolated insulated conductor (9) and an insulated conductor (10) for connection to the tank (2) of the water heater (1) are provided for connecting the protective current generator (4) to the electric water heater. accumulation (1).
  • the magnesium sacrificial anode (5) comprises a recess for mounting the titanium-imposed anode (6), so as to substantially completely embed the titanium anode (6) inside the anode ( 5) magnesium.
  • the titanium anode (6) is mounted on the holding support (3) by means of an insulating and flexible sleeve, for example made of elastomer, around the outer periphery of the holding sheath (3).
  • the interior space of the elastomeric sleeve (8) is connected to the atmosphere of the interior of the insulating support (3), without any contact with the water filling the tank of the water heater.
  • the sacrificial anode (5) magnesium is mounted on the insulating support or holding sheath (3) through an insulating sleeve (7) of elastomer disposed on the periphery of the insulating support (3).
  • the space between the elastomeric sleeves (7) and (8) is isolated from the water in the tank of the water heater, because the radially outer sleeve ( 7) completely surrounds the upper end of the holding sheath (3) carrying the elastomeric sleeve (8).
  • the externally insulated electrical conductor (9) is connected to the titanium imposed current anode (6), so that the titanium imposed current anode (6) can be constantly supplied during the power supply periods of the transformer. electric storage water heater.
  • the titanium imposed current anode (6) is not in contact with the water of the water heater, and the current flowing through this titanium imposed anode can only be discharged at through the sacrificial anode (5) magnesium. Since the diameter and overall dimensions of the magnesium sacrificial anode (5) are much larger than the diameter and dimensions of the titanium imposed current anode (6), the current densities pass through the anode magnesium are much lower than those through the titanium anode.
  • the contribution of the cathodic polarization current makes it possible to slightly increase the protective electrochemical current which is established naturally between the sacrificial magnesium anode (5) and the tank (2) of the electric storage water heater, thereby reinforcing the effect.
  • the electric storage water heater is constantly protected, even in the case of a power supply interrupted in time, using only the power supply in off-peak hours.
  • the operation of the electric water heater according to the invention is thus substantially identical to the operation of an electric water heater of the prior art protected solely by a sacrificial magnesium anode.
  • the sacrificial magnesium anode has been practically consumed.
  • the space between the sleeves (7) and (8) is then at least partially filled by the water inside the tank of the water heater, and the titanium imposed current anode (6). is at least partially in contact with the water of the water heater.
  • the operation of the electric water heater according to the invention is identical to the operation of an electric storage water heater of the prior art equipped with a titanium imposed current anode.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The heater (1) has a sacrificial anode (5) surrounding an impressed current anode (6), and a conformation suitable for avoiding contact of the impressed current anode with water of a tank (2) of an electric water heater before consumption of the sacrificial anode. The impressed anode is in electrical contact with the sacrificial anode. Dimensions of the sacrificial anode are greater than the dimensions of the impressed anode. The sacrificial anode is mounted on a support or a retaining sheath (3) by an elastomeric sleeve.

Description

L'invention est relative à un chauffe-eau électrique à accumulation à double protection cathodique.The invention relates to an electric storage water heater with double cathodic protection.

On connaît deux sortes de protections cathodiques pour assurer la protection d'un chauffe-eau électrique à accumulation contre la corrosion : soit la protection cathodique utilisant une anode sacrificielle comme une anode en magnésium, soit la protection cathodique utilisant une anode permanente à courant imposé.Two types of cathodic protections are known to ensure the protection of an electric water heater with corrosion accumulation: either cathodic protection using a sacrificial anode such as a magnesium anode, or cathodic protection using a fixed current permanent anode.

L'anode en magnésium nécessite d'être remplacée périodiquement lorsqu'elle arrive en fin de consommation, tandis que l'anode à courant imposé nécessite d'être constamment alimentée par une source d'alimentation électrique pour assurer la protection cathodique.The magnesium anode needs to be replaced periodically when it reaches the end of consumption, while the anode with imposed current requires to be constantly supplied by a power source to provide cathodic protection.

Le document WO 2007/010 335 décrit un chauffe-eau électrique à accumulation avec une protection cathodique ajustable. Ce chauffe-eau électrique à accumulation est protégé contre la corrosion dans des conditions normales de fonctionnement et d'alimentation électrique par une électrode permanente à courant imposé, tandis que le chauffe-eau est protégé en l'absence d'alimentation par une anode sacrificielle. L' anode sacrificielle est connectée électriquement à la cuve du chauffe-eau par un interrupteur destiné à interrompre la connexion électrique quand l'alimentation électrique alimente ladite électrode permanente à courant imposé.The document WO 2007/010 335 describes an electric storage water heater with adjustable cathodic protection. This electric storage water heater is protected against corrosion under normal conditions of operation and power supply by a fixed current permanent electrode, while the water heater is protected in the absence of power supply by a sacrificial anode . The sacrificial anode is electrically connected to the tank of the water heater by a switch for interrupting the electrical connection when the power supply supplies said permanent current electrode.

Ce dispositif donne généralement satisfaction, mais nécessite en effet de déconnecter l'anode sacrificielle en cas d'alimentation électrique, pour éviter sa consommation excessive.This device is generally satisfactory, but in fact requires disconnecting the sacrificial anode in case of power supply, to avoid excessive consumption.

Un premier but de l'invention est d'améliorer l'état de la technique connu, en proposant un nouveau chauffe-eau électrique à accumulation à double protection cathodique, ne nécessitant pas de déconnecter l'anode sacrificielle en cas d'alimentation électrique tout en en évitant la consommation excessive.A first object of the invention is to improve the state of the prior art, by proposing a new electric water heater storage double cathodic protection, not requiring to disconnect the sacrificial anode in case of power supply while by avoiding excessive consumption.

Un deuxième but de l'invention est d'assurer la protection cathodique d'un chauffe-eau électrique à accumulation, même en utilisant un système d'alimentation par heures creuses impliquant une absence d'alimention pendant des durées importantes de l'ordre de 16 heures. L'invention a pour objet un chauffe-eau à accumulation à double protection cathodique, comportant une anode sacrificielle et une anode à courant imposé, caractérisé par le fait que l'anode sacrificielle entoure l'anode à courant imposé et présente une conformation apte à éviter tout contact de l'anode à courant imposé avec l'eau de la cuve du chauffe-eau électrique, avant consommation de l'anode sacrificielle.A second object of the invention is to provide the cathodic protection of an electric storage water heater, even using a system of feeding off-peak hours involving a lack of power for long periods of the order of 16 hours. The invention relates to a storage water heater with double cathodic protection, comprising a sacrificial anode and an anode with an imposed current, characterized in that the sacrificial anode surrounds the anode with an imposed current and has a conformation capable of avoid any contact of the imposed current anode with the water of the tank of the electric water heater, before consumption of the sacrificial anode.

Selon d'autres caractéristiques alternatives de l'invention:

  • l'anode à courant imposé est en contact électrique avec l'anode sacrificielle.
  • l'anode sacrificielle comporte un chambrage pour monter l'anode à courant imposé.
  • l'anode sacrificielle est montée sur un support ou une gaine de maintien par l'intermédiaire d'un manchon élastomère.
  • l'anode à courant imposé est montée sur un support ou une gaine de maintien par l'intermédiaire d'un manchon élastomère.
  • le manchon élastomère de l'anode sacrificielle entoure le manchon élastomère de l'anode à courant imposé.
  • les dimensions de l'anode sacrificielle sont notablement supérieures aux dimensions de l'anode à courant imposé.
  • les anodes sacrificielle et à courant imposé présentent des conformations sensiblement cylindriques.
  • le diamètre de l'anode sacrificielle est notablement supérieur au diamètre de l'anode à courant imposé.
  • l'anode à courant imposé est en titane et l'anode sacrificielle est en magnésium :
According to other alternative features of the invention:
  • the imposed current anode is in electrical contact with the sacrificial anode.
  • the sacrificial anode comprises a recess for mounting the imposed current anode.
  • the sacrificial anode is mounted on a support or a holding sheath via an elastomeric sleeve.
  • the imposed current anode is mounted on a support or a holding sheath via an elastomeric sleeve.
  • the elastomeric sleeve of the sacrificial anode surrounds the elastomeric sleeve of the forced current anode.
  • the dimensions of the sacrificial anode are significantly greater than the dimensions of the imposed current anode.
  • the sacrificial and forced-current anodes have substantially cylindrical conformations.
  • the diameter of the sacrificial anode is significantly greater than the diameter of the forced-current anode.
  • the imposed current anode is made of titanium and the sacrificial anode is magnesium:

L'invention sera mieux comprise grâce à la description qui va suivre donnée à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels :

  • La figure 1 représente schématiquement un chauffe-eau électrique à accumulation selon l'invention.
  • La figure 2 représente schématiquement une vue partielle agrandie illustrant le dispositif de protection cathodique du chauffe-eau électrique à accumulation de la figure 1.
  • La figure 3 représente schématiquement une vue partielle analogue à la figure 2 illustrant le fonctionnement de l'invention.
  • La figure 4 représente schématiquement une vue partielle analogue aux figures 2 et 3 illustrant le fonctionnement de l'invention après consommation de l'anode sacrificielle.
The invention will be better understood from the following description given by way of nonlimiting example with reference to the accompanying drawings in which:
  • The figure 1 schematically represents an electric storage water heater according to the invention.
  • The figure 2 schematically represents an enlarged partial view illustrating the cathodic protection device of the electric storage water heater of the figure 1 .
  • The figure 3 schematically represents a partial view similar to the figure 2 illustrating the operation of the invention.
  • The figure 4 schematically represents a partial view similar to Figures 2 and 3 illustrating the operation of the invention after consumption of the sacrificial anode.

En référence aux figures 1 à 4, les éléments identiques ou fonctionnellement équivalents sont repérés par des chiffres de référence identiques.With reference to Figures 1 to 4 identical or functionally equivalent elements are identified by identical reference numerals.

Sur la figure 1 un chauffe-eau électrique à accumulation désigné dans son ensemble par (1) comporte une cuve de une gaine de maintien (3), un générateur de tension (4), une anode sacrificielle (5), une anode à courant imposé (6).On the figure 1 an electric storage water heater generally designated by (1) comprises a vessel of a holding sheath (3), a voltage generator (4), a sacrificial anode (5), an imposed current anode (6) .

Le circuit électrique de polarisation cathodique comporte l'anode sacrificielle (5) en contact électrique avec l'anode (6) à courant imposé réalisée par exemple en titane.The cathodic polarization electrical circuit comprises the sacrificial anode (5) in electrical contact with the imposed current anode (6) made for example of titanium.

Le montage de l'anode (5) sacrificielle en magnésium et de l'anode (6) à courant imposé en titane sur la gaine (3) de maintien est effectué par un des moyens de maintien isolants (7) et (8) qui sont décrits en détail en référence à la figure 2.The magnesium sacrificial anode (5) and the titanium imposed anode (6) are mounted on the holding sheath (3) by means of one of the insulating holding means (7) and (8) which are described in detail with reference to the figure 2 .

Un conducteur isolé (9) d'alimentation et un conducteur isolé (10) de liaison à la cuve (2) du chauffe-eau (1) sont prévus pour relier le générateur (4) de courant de protection au chauffe-eau électrique à accumulation (1).An isolated insulated conductor (9) and an insulated conductor (10) for connection to the tank (2) of the water heater (1) are provided for connecting the protective current generator (4) to the electric water heater. accumulation (1).

Sur la figure 2, l'anode sacrificielle (5) en magnésium comporte un chambrage pour monter l'anode (6) à courant imposé en titane, de manière à noyer presque entièrement l'anode (6) en titane à l'intérieur de l'anode (5) en magnésium.On the figure 2 the magnesium sacrificial anode (5) comprises a recess for mounting the titanium-imposed anode (6), so as to substantially completely embed the titanium anode (6) inside the anode ( 5) magnesium.

L'anode (6) en titane est montée sur le support (3) de maintien à l'aide d'un manchon isolant et souple, par exemple en élastomère, sur le pourtour extérieur de la gaine (3) de maintien. L'espace intérieur au manchon élastomère (8) est relié à l'atmosphère de l'intérieur du support isolant (3), sans aucun contact avec l'eau remplissant la cuve du chauffe-eau.The titanium anode (6) is mounted on the holding support (3) by means of an insulating and flexible sleeve, for example made of elastomer, around the outer periphery of the holding sheath (3). The interior space of the elastomeric sleeve (8) is connected to the atmosphere of the interior of the insulating support (3), without any contact with the water filling the tank of the water heater.

L'anode sacrificielle (5) en magnésium est montée sur le support isolant ou gaine de maintien (3) par l'intermédiaire d'un manchon isolant (7) en élastomère disposé sur la périphérie du support isolant (3).The sacrificial anode (5) magnesium is mounted on the insulating support or holding sheath (3) through an insulating sleeve (7) of elastomer disposed on the periphery of the insulating support (3).

Dans le cas d'une anode sacrificielle (5) neuve, l'espace compris entre les manchons élastomères (7) et (8) est isolé de l'eau de la cuve du chauffe-eau, du fait que le manchon radialement extérieur (7) entoure complètement l'extrémité supérieure de la gaine de maintien (3) portant le manchon élastomère (8).In the case of a new sacrificial anode (5), the space between the elastomeric sleeves (7) and (8) is isolated from the water in the tank of the water heater, because the radially outer sleeve ( 7) completely surrounds the upper end of the holding sheath (3) carrying the elastomeric sleeve (8).

Le conducteur électrique (9) extérieurement isolé est raccordé à l'anode (6) à courant imposé en titane, de sorte que l'anode (6) à courant imposé en titane peut-être alimentée constamment lors des périodes d'alimentation électrique du chauffe-eau électrique à accumulation.The externally insulated electrical conductor (9) is connected to the titanium imposed current anode (6), so that the titanium imposed current anode (6) can be constantly supplied during the power supply periods of the transformer. electric storage water heater.

Sur la figure 3, en début de fonctionnement, l'anode à courant imposé (6) en titane n'est pas en contact avec l'eau du chauffe-eau, et le courant qui traverse cette anode à courant imposé en titane peut seulement s'évacuer à travers l'anode sacrificielle (5) en magnésium. Du fait que le diamètre et les dimensions générales de l'anode sacrificielle (5) en magnésium sont beaucoup plus importants que le diamètre et les dimensions de l'anode à courant imposé (6) en titane, les densités de courant traversant l'anode en magnésium sont beaucoup plus faibles que celles traversant l'anode en titane.On the figure 3 at the beginning of operation, the titanium imposed current anode (6) is not in contact with the water of the water heater, and the current flowing through this titanium imposed anode can only be discharged at through the sacrificial anode (5) magnesium. Since the diameter and overall dimensions of the magnesium sacrificial anode (5) are much larger than the diameter and dimensions of the titanium imposed current anode (6), the current densities pass through the anode magnesium are much lower than those through the titanium anode.

Cependant, l'apport du courant de polarisation cathodique permet d'augmenter faiblement le courant électrochimique de protection qui s'établit naturellement entre l'anode sacrificielle en magnésium (5) et la cuve (2) du chauffe-eau électrique à accumulation, en en renforçant ainsi l'effet.However, the contribution of the cathodic polarization current makes it possible to slightly increase the protective electrochemical current which is established naturally between the sacrificial magnesium anode (5) and the tank (2) of the electric storage water heater, thereby reinforcing the effect.

Ainsi, grâce à l'invention, le chauffe-eau électrique à accumulation est constamment protégé, même dans le cas d'une alimentation électrique interrompue dans le temps, en utilisant uniquement l'alimentation par heures creuses.Thus, thanks to the invention, the electric storage water heater is constantly protected, even in the case of a power supply interrupted in time, using only the power supply in off-peak hours.

Le fonctionnement du chauffe-eau électrique selon l'invention est ainsi pratiquement identique au fonctionnement d'un chauffe-eau électrique de l'art antérieur protégé uniquement par une anode sacrificielle en magnésium.The operation of the electric water heater according to the invention is thus substantially identical to the operation of an electric water heater of the prior art protected solely by a sacrificial magnesium anode.

Sur la figure 4, l'anode sacrificielle en magnésium a été pratiquement consommée. L'espace compris entre les manchons (7) et (8) est alors rempli au moins partiellement par l'eau se trouvant à l'intérieur de la cuve du chauffe-eau, et l'anode à courant imposé (6) en titane est au moins partiellement en contact avec l'eau du chauffe-eau.On the figure 4 the sacrificial magnesium anode has been practically consumed. The space between the sleeves (7) and (8) is then at least partially filled by the water inside the tank of the water heater, and the titanium imposed current anode (6). is at least partially in contact with the water of the water heater.

Dans ce cas, le fonctionnement du chauffe-eau électrique selon l'invention est identique au fonctionnement d'un chauffe-eau électrique à accumulation de l'art antérieur équipé d'une anode à courant imposé en titane.In this case, the operation of the electric water heater according to the invention is identical to the operation of an electric storage water heater of the prior art equipped with a titanium imposed current anode.

L'invention décrite en référence à un mode de réalisation particulier n'y est nullement limitée, et couvre au contraire toute modification de forme et toute variante de réalisation dans le cadre et l'esprit de l'invention.The invention described with reference to a particular embodiment is not limited thereto, and on the contrary covers any modification of form and any variant embodiment within the scope and spirit of the invention.

Claims (10)

Chauffe-eau (1) à accumulation à double protection cathodique, comportant une anode sacrificielle (5) et une anode (6) à courant imposé, caractérisé par le fait que l'anode sacrificielle (5) entoure l'anode (6) à courant imposé et présente une conformation apte à éviter tout contact de l'anode (6) à courant imposé avec l'eau de la cuve (2) du chauffe-eau (1) électrique, avant consommation de l'anode (5) sacrificielle.Water heater (1) with double cathodic protection, comprising a sacrificial anode (5) and an anode (6) with imposed current, characterized in that the sacrificial anode (5) surrounds the anode (6) with imposed current and has a conformation able to avoid any contact of the imposed current anode (6) with the water of the tank (2) of the electric water heater (1), before consumption of the sacrificial anode (5) . Chauffe-eau selon la R1, caractérisé par le fait que l'anode (6) à courant imposé est en contact électrique avec l'anode (5) sacrificielle.Water heater according to R1, characterized in that the anode (6) with an imposed current is in electrical contact with the sacrificial anode (5). Chauffe-eau selon la R1 ou la R2, caractérisé par le fait que l'anode (5) sacrificielle comporte un chambrage pour monter l'anode (6) à courant imposé.Water heater according to R1 or R2, characterized in that the sacrificial anode (5) has a counterbore for mounting the imposed current anode (6). Chauffe-eau selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'anode (5) sacrificielle est montée sur un support (3) ou une gaine de maintien par l'intermédiaire d'un manchon élastomère (7).Water heater according to any one of the preceding claims, characterized in that the sacrificial anode (5) is mounted on a support (3) or a holding sheath via an elastomeric sleeve (7). Chauffe-eau selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'anode (6) à courant imposé est montée sur un support (3) ou une gaine de maintien par l'intermédiaire d'un manchon élastomère (8).Water heater according to any one of the preceding claims, characterized in that the anode (6) with an imposed current is mounted on a support (3) or a holding sheath via an elastomeric sleeve (8). ). Chauffe-eau selon les revendications 4 et 5, caractérisé par le fait que le manchon élastomère (7) de l'anode (5) sacrificielle entoure le manchon élastomère (8) de l'anode (6) à courant imposé.Water heater according to claims 4 and 5, characterized in that the elastomeric sleeve (7) of the sacrificial anode (5) surrounds the elastomeric sleeve (8) of the forced-anode (6). Chauffe-eau selon la revendication 1, caractérisé par le fait que les dimensions de l'anode sacrificielle (5) sont notablement supérieures aux dimensions de l'anode (6) à courant imposé.Water heater according to claim 1, characterized in that the dimensions of the sacrificial anode (5) are significantly greater than the dimensions of the anode (6) with an imposed current. Chauffe-eau selon la revendication 7, caractérisé par le fait que les anodes sacrificielle (5) et à courant imposé (6) présentent des conformations sensiblement cylindriques.Water heater according to Claim 7, characterized in that the sacrificial (5) and forced-current anodes (6) have substantially cylindrical conformations. Chauffe-eau selon la revendication 8, caractérisé par le fait que le diamètre de l'anode sacrificielle (5) est notablement supérieur au diamètre de l'anode (6) à courant imposé.Water heater according to claim 8, characterized in that the diameter of the sacrificial anode (5) is significantly greater than the diameter of the anode (6) with imposed current. Chauffe-eau selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'anode (6) à courant imposé est en titane et l'anode (5) sacrificielle est en magnésium.Water heater according to any one of the preceding claims, characterized in that the imposed current anode (6) is made of titanium and the sacrificial anode (5) is magnesium.
EP10175913.2A 2009-09-16 2010-09-09 Container boiler with double cathodic protection Active EP2298963B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10175913T PL2298963T3 (en) 2009-09-16 2010-09-09 Container boiler with double cathodic protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0956357A FR2950081B1 (en) 2009-09-16 2009-09-16 WATER HEATER WITH DOUBLE CATHODIC PROTECTION ACCUMULATION

Publications (3)

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EP2298963A2 true EP2298963A2 (en) 2011-03-23
EP2298963A3 EP2298963A3 (en) 2017-02-15
EP2298963B1 EP2298963B1 (en) 2020-04-22

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US (1) US8649671B2 (en)
EP (1) EP2298963B1 (en)
CN (1) CN102022818B (en)
EG (1) EG26267A (en)
ES (1) ES2804353T3 (en)
FR (1) FR2950081B1 (en)
PL (1) PL2298963T3 (en)
PT (1) PT2298963T (en)
RU (1) RU2451882C1 (en)
UA (1) UA96093C2 (en)

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CN112815531A (en) * 2019-11-15 2021-05-18 青岛海尔智能技术研发有限公司 Anti-corrosion device for electric water heater and direct current electric water heater

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CN112815531A (en) * 2019-11-15 2021-05-18 青岛海尔智能技术研发有限公司 Anti-corrosion device for electric water heater and direct current electric water heater

Also Published As

Publication number Publication date
US8649671B2 (en) 2014-02-11
PL2298963T3 (en) 2020-11-30
RU2451882C1 (en) 2012-05-27
PT2298963T (en) 2020-07-10
EP2298963B1 (en) 2020-04-22
UA96093C2 (en) 2011-09-26
EG26267A (en) 2013-06-05
FR2950081B1 (en) 2011-12-09
US20110064392A1 (en) 2011-03-17
RU2010137646A (en) 2012-03-20
CN102022818A (en) 2011-04-20
EP2298963A3 (en) 2017-02-15
CN102022818B (en) 2013-06-05
ES2804353T3 (en) 2021-02-05
FR2950081A1 (en) 2011-03-18

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