EP1710511A2 - Chaudière comportant des appareils pour l'optimisation la distribution d'eau chaude sanitaire et procédé correspondant - Google Patents

Chaudière comportant des appareils pour l'optimisation la distribution d'eau chaude sanitaire et procédé correspondant Download PDF

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Publication number
EP1710511A2
EP1710511A2 EP06003351A EP06003351A EP1710511A2 EP 1710511 A2 EP1710511 A2 EP 1710511A2 EP 06003351 A EP06003351 A EP 06003351A EP 06003351 A EP06003351 A EP 06003351A EP 1710511 A2 EP1710511 A2 EP 1710511A2
Authority
EP
European Patent Office
Prior art keywords
temperature
water
flow rate
boiler
sanitary water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06003351A
Other languages
German (de)
English (en)
Inventor
Paolo Mazzoni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hermann Srl
Original Assignee
Hermann Srl
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 Hermann Srl filed Critical Hermann Srl
Publication of EP1710511A2 publication Critical patent/EP1710511A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • 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
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/238—Flow rate
    • 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
    • F24H15/36—Control of heat-generating means in heaters of burners
    • 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

Definitions

  • This invention relates to a boiler for instant heating and production of sanitary water with a double heat exchanger or a singie integrated bithermal heat exchanger, containing devices able to optimise the supply of sanitary hot water by regulating the flow rate in such a way as to limit the flow until it reaches the required temperature, and then increasing the flow as it approaches the selected temperature.
  • the flow of hot water is also constantly monitored when the boiler is in full operation, and the devices may intervene to limit it, depending on the characteristics of the boiler and the input parameters such as the water temperature and pressure, so as to guarantee the maximum possible flow at the required temperature, depending on the type of boiler and the operating conditions.
  • the invention also relates to the method of management of the appliance.
  • the water that circulates in the primary heat exchanger is diverted to a second or secondary heat exchanger, into which the sanitary water flows and absorbs heat by conduction, after which it is conveyed to the point of use.
  • the present invention relates to a boiler with devices able to optimise the supply of sanitary hot water, wherein the temperature of the water supplied is continuously monitored and means are present which act continuously on a flow-limiting valve, so as to gradually increase the cross-sectional area through which the sanitary water passes, and consequently its flow rate as the temperature approaches the pre-set value.
  • these means continue to monitor the water temperature and if necessary limit the flow rate, depending on the potential of the boiler and the input parameters such as pressure, temperature, variations in flow rate due to the opening of other points of use and so on, so as to provide a constant output flow of water having a substantially constant temperature, corresponding to the temperature selected by the user.
  • no. 1 indicates the combustion chamber of a boiler according to the invention, wherein a burner 2, supplied with gas through a pipe 3, supplies heat to a first or primary heat exchanger 4, inserted in a circuit wherein a pump 5 circulates heating water.
  • An expansion tank 8 is connected to the circuit of the primary exchanger. Said circuit is fitted with a diverter valve 9 that diverts the hot water from delivery pipe 6 to a branch 10 directed to a second or secondary heat exchanger, shown as 11.
  • the sanitary water circuit leads to exchanger heat 11, with an inlet pipe 12 and an outlet 13.
  • a flow-limiting valve 14, a flow rate measuring device 15 of known type, and a probe 16 for detecting the temperature of the water output are inserted in this circuit.
  • Flow-limiting valve 14, illustrated schematically in cross-section in figure 3, is a solenoid valve wherein a coil 17 controls the movements of a rod 18, at the ends of which is fitted a disc 19 which is inserted into input pipe 12 for sanitary water directed to heat exchanger 11.
  • disc 18 does not fully close pipe 12, because it presents a small slot or opening 20 at one end through which a minimum quantity of water can always pass.
  • the sanitary water then moves in pipe 12, and consequently in heat exchanger 11, at a lower speed, thus absorbing a larger amount of heat and reaching the selected temperature in a shorter time, without any wastage of water which the user does not use because it is still cold.
  • control unit controls the start of reopening of the proportional valve, controlling the movement of disc 19 in such a way as to maintain the heat balance in the secondary exchanger, thus guaranteeing the stability of the output temperature as the flow rate increases.
  • the temperature of the output water is constantly controlled by probe 16, and when this temperature approaches the set value, the control system starts to open valve 14 gradually until the flow rate value determined by the user's requirements is reached.
  • the system also regulates the quantity of gas sent to the burner, in order to limit it if the temperature tends to exceed the required value, for example if a low flow rate is requested.
  • the system modulates the amount of gas supplied, in order to keep this temperature stable.
  • the system checks the state of opening of the proportional valve and the heating power supplied, so as to gradually identify the maximum sanitary water flow rate which can be delivered, depending on the power of the boiler and the input conditions, especially the water pressure and temperature, to maintain a constant output temperature.
  • the maximum value of the optimum flow rate is stored together with the degree of opening of the proportional valve which determines that flow rate value, and is taken as the maximum flow rate value for the current supply and the initial stage of subsequent drawing, until the subsequent autocalibration stage.
  • the boiler according to the invention also includes a system of continuous control of the sanitary water temperature and flow rate, the characteristics of which are constantly monitored after the initial stage so as to limit the maximum flow rate according to the characteristics of the boiler and the input parameters, in order to guarantee that the sanitary water supplied will always be at the required temperature, making the maximum use of the performance of the boiler.
  • the conditions of use of the boiler can vary during use. For example if, during drawing of hot water by a first user, a second drawing of sanitary water is generated by another user, this leads to a considerable increase in the heating power required to satisfy both users.
  • valve 14 acts on valve 14 to limit this flow rate to the maximum flow rate value obtained during autocalibration, so as to supply an overall output flow which, though partly reduced below the users' demand, corresponds to the maximum quantity which the boiler is able to provide at the desired temperature, thus exploiting all the heating power available and guaranteeing continuous maintenance of comfort, though with a partly reduced flow of water, said comfort being of crucial importance as the water leaving the tap comes into direct contact with the user.
  • the system also constantly checks the operating conditions, including when it is in full operation, and in the event of variation in one of the parameters in question (input water temperature, reduction in pressure of installation, or demand for an excessive flow of heated water) it operates the flow-limiting valve so as to limit said flow rate to a value, based on the power of the boiler, which allows the sanitary water to reach and maintain the temperature required by the user, possibly partialising the flow if the boiler does not have enough power to meet this demand.
  • the parameters in question input water temperature, reduction in pressure of installation, or demand for an excessive flow of heated water

Landscapes

  • 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)
  • Fluid Mechanics (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
EP06003351A 2005-04-04 2006-02-20 Chaudière comportant des appareils pour l'optimisation la distribution d'eau chaude sanitaire et procédé correspondant Withdrawn EP1710511A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000016A ITPC20050016A1 (it) 2005-04-04 2005-04-04 Caldaia con dispositivi per l'ottimizzazione della fornitura di acqua calda sanitaria e relativo metodo

Publications (1)

Publication Number Publication Date
EP1710511A2 true EP1710511A2 (fr) 2006-10-11

Family

ID=36587270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06003351A Withdrawn EP1710511A2 (fr) 2005-04-04 2006-02-20 Chaudière comportant des appareils pour l'optimisation la distribution d'eau chaude sanitaire et procédé correspondant

Country Status (2)

Country Link
EP (1) EP1710511A2 (fr)
IT (1) ITPC20050016A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1884720A1 (fr) * 2006-07-28 2008-02-06 Grundfos Management A/S Ensemble pour installation de chauffage compact
CN101852460A (zh) * 2010-03-29 2010-10-06 东南大学 一种可手机遥控的总线型区域供热计量管理系统
RU2453773C1 (ru) * 2008-04-22 2012-06-20 Кабусики Кайся Тесуку Электрический циркуляционный нагреватель горячей воды

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1884720A1 (fr) * 2006-07-28 2008-02-06 Grundfos Management A/S Ensemble pour installation de chauffage compact
RU2453773C1 (ru) * 2008-04-22 2012-06-20 Кабусики Кайся Тесуку Электрический циркуляционный нагреватель горячей воды
CN101852460A (zh) * 2010-03-29 2010-10-06 东南大学 一种可手机遥控的总线型区域供热计量管理系统
CN101852460B (zh) * 2010-03-29 2012-07-18 东南大学 一种可手机遥控的总线型区域供热计量管理系统

Also Published As

Publication number Publication date
ITPC20050016A1 (it) 2006-10-05

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