WO2005013028A1 - Protecteur thermoelectronique pour chauffe-eau electriques - Google Patents

Protecteur thermoelectronique pour chauffe-eau electriques Download PDF

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Publication number
WO2005013028A1
WO2005013028A1 PCT/IB2004/002489 IB2004002489W WO2005013028A1 WO 2005013028 A1 WO2005013028 A1 WO 2005013028A1 IB 2004002489 W IB2004002489 W IB 2004002489W WO 2005013028 A1 WO2005013028 A1 WO 2005013028A1
Authority
WO
WIPO (PCT)
Prior art keywords
control device
fact
per
temperature
previous
Prior art date
Application number
PCT/IB2004/002489
Other languages
English (en)
Inventor
Fausto Fioroni
Renato Moreci
Lucio Latini
Roberto Sampaolesi
Original Assignee
Thermowatt S.P.A.
Merloni Termosanitari S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thermowatt S.P.A., Merloni Termosanitari S.P.A. filed Critical Thermowatt S.P.A.
Priority to EP04744140A priority Critical patent/EP1652017B1/fr
Priority to DE602004031430T priority patent/DE602004031430D1/de
Priority to PL04744140T priority patent/PL1652017T3/pl
Priority to AT04744140T priority patent/ATE498863T1/de
Publication of WO2005013028A1 publication Critical patent/WO2005013028A1/fr

Links

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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/128—Preventing overheating
    • 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
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • 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
    • F24H15/281—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
    • F24H15/30—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
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/407—Control of fluid heaters characterised by the type of controllers using electrical switching, e.g. TRIAC

Definitions

  • This invention relates to regulation and safety control devices for electric water boilers.
  • Electric water boilers have two devices that control the temperature of the water contained in the tank.
  • One is a regulating thermostat (hereinafter also referred to as the heat regulator). Its task is that of adjusting the temperature by maintaining the water boiler's temperature at the t.r value set either by the manufacturer and/or by the user; of course, any regulation range made available to the user prevents that dangerous temperatures can be reached.
  • the other device is a thermal-protector thermostat (hereinafter referred to as the thermal- protector). Its task is that of providing thermal protection by cutting off the power supply to the electrical resistances if the monitored temperature reaches an intermediate cut-off value of t.i ranging between the temperature values that can be reached during normal operation and the maximum value of t.s envisaged by Safety Regulations.
  • this may take place only if the regulating thermostat has suffered a failure; for instance, if the setting is not correct or if its electrical contacts are welded and can no longer open.
  • an anomalous situation such as, for instance, the lack of water in the tank, may lead to sudden increases in temperature that activate the thermal-protector even though the regulating thermostat is in perfect condition.
  • the accuracy of the regulating thermostat is extremely important, not so much in terms of comfort but for the purpose of limiting consumption; given the same mean temperature in the water boiler over a given period, the sharper the variations in the actual temperature owing to its inaccurate control are, the greater the loss of heat, as proven experimentally. From this point of view it is a matter of fact that the most precise electro-mechanical thermostats are those using a bulb sensor followed by a rod sensor and then by those whose sensor is composed of a bistable bimetallic foil.
  • Electronic thermostats are by far the best, generally using an NTC as sensor, that not only provides for an accurate regulation which could not be otherwise reached with electro-mechanical thermostats, but they also offer many other advantages such as the ease in controlling them with a microprocessor, by means of which the operating time and temperatures as well as other functions can be programmed.
  • electromechanical thermostats cut off the power supply to the electrical resistances by physically opening an electrical contact
  • electronic thermostats act by stopping the passage of current through a semiconductor device (the TRIAC), which, in turn, can be arranged directly in series along the circuit of the electrical resistances if the required amperage is low enough or by commanding the opening of a relay, which, in turn, disconnects the circuit of the resistances. Nonetheless, the safety regulations do not require that the regulating thermostat physically disconnect the phases of an electric circuit.
  • thermo-protector thermostat The bipolar physical disconnection of both ends of the electrical circuit of the resistances is commanded by the thermal-protector thermostat; on the other hand, no particular degree of accuracy is required for the activation temperature, as the tolerance values of the less sensitive sensors like those with a bistable bimetallic foil are capable of being activated at cut-off temperatures t.i much higher than the regulation temperature t.r yet well below the maximum permissible temperatures t.s. Hitherto, the thermal-protector thermostat in water boilers has always been of the electro-mechanical type with an extremely simple mechanism; in general it is of the type containing the well-known bistable bimetallic disks as sensor/actuator device.
  • the thermal-protector thermostat irreversibly opens the two (or three) power supply phases; the resetting of the contacts is possible in most models to restart the water boiler when the overtemperature is not the result of malfunctions affecting the regulating thermostat, but the reset device must be accessed only by a maintenance technician, thereby constituting the inconvenience that the resetting of the water boiler always requires the intervention of the technical servicing department, even if the cause of the block was absolutely accidental.
  • the electro-mechanical regulating thermostat and the thermal-protector thermostat are often lodged in the same casing; but this does not mean that they are not two independent devices, each having its own sensor, its own mechanism for opening the electrical contacts and finally its own electrical contacts. In conclusion, safety requires that the two thermostats must each have their own “electro-mechanical logic".
  • thermal-protector As for the electronic regulating thermostats, their use has been limited up to now to higher level products, considering the impossibility of eliminating the costs for the electromechanical thermal-protector, which, among other things, is usually quite difficult to include in the same casing with the electronic thermostat. While the most widespread type of thermal- protector is the one with bimetallic foil, it must be lodged as close as possible to the zone whose temperature must be monitored, i.e. the zone in which the operating temperature can be high enough to damage the electronic devices even in normal operating conditions.
  • the main purpose of this invention is that of specifying the means by which to obtain a single control device capable of acting, at minimum, as regulating thermostat and thermal-protector in an electric water boiler.
  • Another purpose of this invention is that of specifying the means by which to allow the said single control device to use a single operating logic, i.e. a single hardware device and a single software device, at least for the control of the heat regulator and thermal -protector functions.
  • Another purpose of this invention is that of allowing the user to reset regular water boiler operation when it is blocked by the thermal-protector owing to accidental causes not ascribable to detected failures.
  • Another purpose of this invention is that of assigning to the said single control device further information, programming and control functions which are not related to either the heat regulation or thermal protection. According to the invention, these and other purposes are achieved by means of a control device including a combination of suitable electronic and electro-mechanical means which function according to appropriate methods.
  • Fig. 1 schematically illustrates an electronic and electro-mechanical control device R according to the invention.
  • R indicates a control device which, taken as a whole, has the functions of heat regulator and thermal-protector; 1 is an electrical power circuit powering, via the connection terminals 2.1, the electrical resistances 2 that heat the water; 3 indicates a regulation relay whose opening/closing controls the power supply to the resistances 2 to maintain the water at the temperature set during regular operation; 4 indicates two safety relays (or, alternatively, a single relay with a double micro-switch) which the control device R opens should it detect any operating malfunction incompatible with the safety regulations; 5 indicates two possible fuses which are arranged in series with said relays 4 and which protect the contacts of the relays 4 against overcurrents which would lead to their sticking.
  • Control device R comprises one or two temperature sensors 6, preferably of the NTC type or in any case of a type fit to transmit temperature signals that can be interpreted by electronic devices; of the two sensors 6, one is dedicated to the control of the set regulation temperature t.r and the other to the control of the cut-off temperature t.i; however, consistent with the requirements of the relevant regulations and with the points in which said regulation temperature t.r and cut-off temperature t.i must or can be detected, a single sensor 6 can be used both for the information relating to the heat regulation and for the thermal protection; at least a second sensor 6 can be useful for auxiliary functions not relating to heat regulation and to thermal protection such as, for instance, and according to known methods, the estimation of the mean temperature and the energy content of the water boiler, which can be easily inferred if the water temperature in two different duly chosen zones are known. Control device R also comprises a microprocessor 7 equipped with specific software to perform, at minimum, the following tasks:
  • the operating malfunctions that can be identified by the microprocessor 7 include not only the detection of overtemperatures signaled by the sensors 6, but also the failure of said sensors owing to an interruption or short-circuit signaled by an infinite, null or educa value of their electrical resistor, i.e. outside the range of possible values for the intact sensors 6.
  • the control device R comprises also a hardware circuit 8 which acts as a supervisor (commonly called and well-known as the system "watch-dog"); it monitors the proper functioning of the microprocessor 7 and it opens the relays 4 by means of the command circuits 4.2, if anomalous behavior is detected in the microprocessor 7 or in other essential or auxiliary devices including the control device R.
  • a hardware circuit 8 which acts as a supervisor (commonly called and well-known as the system "watch-dog”); it monitors the proper functioning of the microprocessor 7 and it opens the relays 4 by means of the command circuits 4.2, if anomalous behavior is detected in the microprocessor 7 or in other essential or auxiliary devices including the control device R.
  • the said watch-dog 8 which functions according to known techniques and methods, it shall not be mentioned any further below, as it is implicitly inferred that it can supervise the control of any function within the limits provided by the current state of the art.
  • the said reset command is accepted by the safety system only when the microprocessor 7 ascertains that the malfunction causing the opening of the relays 4 no longer subsists. In other words, if, for instance, there is an accidental increase in the temperature, the reset command and the subsequent closing of the relays 4 is accepted, but only once the temperature is back to normal; on the contrary, if, by way of example, the malfunction consists in the irreversible failure of a sensor, it is not possible to restore normal conditions and hence the reset command continues to be rejected by the microprocessor 7.
  • electro-mechanical thermal-protectors are also provided with a reset command to reset the thermostat once the malfunction has been eliminated; it comprises a pushbutton, which, once pressed, acts directly on the electrical contacts by closing them; pressing the pushbutton, however, may force the closing of said contacts even though the malfunction is still in progress. For this reason, the said pushbutton is lodged in a place which cannot be accessed by the user and it is protected by a cover which can be opened with a special tool so that only an authorized repair technician can activate it.
  • control device R may also be designed to be able to take into account and memorize the number of reset commands it has accepted and limit the maximum possible number of resets to a set value beyond which it rejects any other command. Therefore, even a temporary and reversible malfunction may require the intervention of the technical servicing department if it occurs too often, hence indicating that there is a recurring problem that needs to be identified and resolved.
  • control device R can include the presence of a non-volatile memory 10 such as an EEPROM, i.e. a memory which is not deleted if there is no power and which saves with an appropriate code all the anomalies detected and/or the number of resets accepted; said memory 10 can also save data not relating to the heat regulation and thermal protection, but which are nonetheless useful in performing the aforementioned auxiliary functions.
  • a display 11 may also be furnished, providing the user with information on the status of the water boiler with regard to both the heat regulation and thermal protection functions and to the auxiliary functions.
  • control device R has a single "electronic logic”, even though it is redundant for safety reasons and it includes both a software and hardware component, comprising the watch-dog 8. Said "electronic logic” is not composed of specific parts dedicated to heat regulation, thermal protection and to the auxiliary functions.
  • the "electronic logic" of the control device R controls the operation of the regulation relay 3 or, in other words, it carries out the heat regulation procedure; once the cut-off temperature ti is exceeded or if there are other malfunctions, the same control device R opens both safety relays 4, namely, it starts the thermal protection procedure by blocking the water boiler; in the meantime, the "electronic logic” of the control device R can also perform other auxiliary information or programming functions, and so on.
  • the advantage is clearly that the control device R provides for the development of non- essential functions which are however useful for programming and other purposes with only negligible additional costs.
  • the safety relays 4 can be either of the Normally Closed or Normally Opened type, as they both can be safely opened or kept opened by the control device R in case of anomalous conditions.
  • the cut-off device 3 as in the case of current electronic regulating thermostats, may have a TRIAC instead of a relay.
  • the regulation relay 3 can be eliminated and its function can be assigned to either one or both of the safety relays 4.
  • control device R can be further improved by adding one or more of the following functions or devices: - the aforementioned fuses 5 can be included; - in heat regulation mode, it is possible and sufficient to command alternatingly the opening of just one of the two relays 4 so that the wear of their contacts proceeds evenly and that the possibility of 2 x 300.000 open-close cycles for the electrical resistances 2 are guaranteed for the purpose of heat regulation;
  • control device R can be blocked by opening the relays 4 definitively;
  • - failure to open a contact of one of the relays 4 can be detected by the control device R in various ways by means of electrical or thermal signals (for instance, by detecting that there was a drop in the voltage at the ends of the electrical resistances 2 or that, despite the open command, the temperature continues to rise) with the subsequent immediate and non-resettable opening of the other relay 4.

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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)
  • Safety Devices In Control Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Insulated Conductors (AREA)
  • Details Of Indoor Wiring (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Air Conditioning Control Device (AREA)
  • Thermistors And Varistors (AREA)
  • Control Of Temperature (AREA)
  • Cookers (AREA)
  • Thermally Insulated Containers For Foods (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

Ce dispositif de commande (R) peut mettre en oeuvre des procédures de régulation thermique et de protection thermique de chauffe-eau électriques. Dans les conditions normales de fonctionnement, la procédure de régulation thermique est en cours et l'alimentation en énergie des résistances électriques (2) est actionnée ou interrompue par des moyens (3) susceptibles d'éviter le passage de courant dans le circuit électrique (1). Dans des conditions anormales de fonctionnement, la procédure de protection thermique est activée ; elle coupe le circuit (1) en ouvrant les deux relais (4). Selon l'invention, un seul dispositif électronique (7, 8, 9, 10) reçoit des informations d'un ou plusieurs capteurs (6) de la température, gère les procédures de régulation et de protection thermique et décide si la procédure de régulation thermique doit être poursuivie ou si la procédure de protection thermique doit être activée par ouverture des deux relais (4). Un circuit logique matériel (8) assure la fonction de surveillance (8) en ce qu'il surveille l'exactitude des opérations effectuées. L'invention concerne également la possibilité de remettre manuellement la procédure de régulation thermique à l'état initial, une fois que la situation anormale a cessé d'exister, jusqu'à un nombre maximal de tentatives de remise à l'état initial.
PCT/IB2004/002489 2003-08-04 2004-07-21 Protecteur thermoelectronique pour chauffe-eau electriques WO2005013028A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04744140A EP1652017B1 (fr) 2003-08-04 2004-07-21 Protecteur thermoelectronique pour chauffe-eau electriques
DE602004031430T DE602004031430D1 (de) 2003-08-04 2004-07-21 Elektronischer thermischer schutz für warmwasserbereiter
PL04744140T PL1652017T3 (pl) 2003-08-04 2004-07-21 Elektroniczny układ zabezpieczenia termicznego dla elektrycznych wodnych bojlerów
AT04744140T ATE498863T1 (de) 2003-08-04 2004-07-21 Elektronischer thermischer schutz für warmwasserbereiter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITAN2003A000039 2003-08-04
IT000039A ITAN20030039A1 (it) 2003-08-04 2003-08-04 Termoprotettore elettronico per scaldabagni elettrici.

Publications (1)

Publication Number Publication Date
WO2005013028A1 true WO2005013028A1 (fr) 2005-02-10

Family

ID=34113412

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/002489 WO2005013028A1 (fr) 2003-08-04 2004-07-21 Protecteur thermoelectronique pour chauffe-eau electriques

Country Status (10)

Country Link
EP (1) EP1652017B1 (fr)
CN (1) CN100492242C (fr)
AT (1) ATE498863T1 (fr)
DE (1) DE602004031430D1 (fr)
ES (1) ES2361258T3 (fr)
IT (1) ITAN20030039A1 (fr)
PL (1) PL1652017T3 (fr)
PT (1) PT1652017E (fr)
RU (1) RU2321046C2 (fr)
WO (1) WO2005013028A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9819172B2 (en) 2013-04-08 2017-11-14 Huawei Device (Dongguan) Co., Ltd. Thermal protection circuit
GB2573575A (en) * 2018-05-11 2019-11-13 Genlab Ltd A temperature controller
CN110873466A (zh) * 2018-08-30 2020-03-10 青岛经济技术开发区海尔热水器有限公司 采暖炉制热系统超温保护控制方法及采暖炉
CN113078891A (zh) * 2021-03-29 2021-07-06 宝信软件(武汉)有限公司 一种硅钢厂调功器故障报警自动复位的方法和系统

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAN20070026A1 (it) * 2007-04-27 2008-10-28 Merloni Termosanitari Spa Metodo di gestione della temperatura dell' acqua in scaldacqua ad accumulo
IT1401027B1 (it) 2010-07-29 2013-07-12 Thermowatt Spa Termostato elettronico ed elettromeccanico perfezionato
IT1401780B1 (it) 2010-09-22 2013-08-28 Thermowatt Spa Termostato elettronico con sicurezza attivata da resistori.
EP2466224B1 (fr) * 2010-10-21 2014-05-21 Kyungdong One Corporation Procédé permettant de contrôler le fonctionnement parallèle d'un chauffe-eau multiple
RU2585014C2 (ru) * 2014-10-03 2016-05-27 Рафаил Шайхуллович Насибуллин Электроконвектор
CN105425708A (zh) * 2015-12-18 2016-03-23 贵州美诚凯辉电器制造有限公司 主动安全保护方法及实现该方法的装置
FR3045786B1 (fr) * 2015-12-21 2017-12-29 Atlantic Industrie Sas Procede de regulation d'un appareil de chauffage en fonction de sa distance a un obstacle, et appareil de chauffage associe
CN106091351A (zh) * 2016-08-02 2016-11-09 李连洪 速热机
EP3300209B1 (fr) * 2016-09-26 2022-04-20 Laborelec CVBA Système de production et de consommation d'électricité efficace en énergie et méthode de mise en oeuvre efficace en énergie de ce système
IT202200014743A1 (it) * 2022-07-13 2024-01-13 Tenacta Group Spa Dispositivo per stilizzare i capelli fornito di circuito di sicurezza

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8501754A (nl) 1985-06-19 1987-01-16 Daalderop Bv Boiler.
US6246831B1 (en) * 1999-06-16 2001-06-12 David Seitz Fluid heating control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8501754A (nl) 1985-06-19 1987-01-16 Daalderop Bv Boiler.
US6246831B1 (en) * 1999-06-16 2001-06-12 David Seitz Fluid heating control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9819172B2 (en) 2013-04-08 2017-11-14 Huawei Device (Dongguan) Co., Ltd. Thermal protection circuit
GB2573575A (en) * 2018-05-11 2019-11-13 Genlab Ltd A temperature controller
CN110873466A (zh) * 2018-08-30 2020-03-10 青岛经济技术开发区海尔热水器有限公司 采暖炉制热系统超温保护控制方法及采暖炉
CN110873466B (zh) * 2018-08-30 2022-10-18 青岛经济技术开发区海尔热水器有限公司 采暖炉制热系统超温保护控制方法及采暖炉
CN113078891A (zh) * 2021-03-29 2021-07-06 宝信软件(武汉)有限公司 一种硅钢厂调功器故障报警自动复位的方法和系统

Also Published As

Publication number Publication date
ATE498863T1 (de) 2011-03-15
PT1652017E (pt) 2011-05-09
DE602004031430D1 (de) 2011-03-31
CN1864113A (zh) 2006-11-15
EP1652017B1 (fr) 2011-02-16
ES2361258T3 (es) 2011-06-15
EP1652017A1 (fr) 2006-05-03
PL1652017T3 (pl) 2011-07-29
RU2321046C2 (ru) 2008-03-27
RU2006105098A (ru) 2006-08-10
CN100492242C (zh) 2009-05-27
ITAN20030039A1 (it) 2005-02-05

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