EP0226246A1 - Gerät zum Kontrollieren eines Heisswasserbereiters - Google Patents

Gerät zum Kontrollieren eines Heisswasserbereiters Download PDF

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Publication number
EP0226246A1
EP0226246A1 EP86202128A EP86202128A EP0226246A1 EP 0226246 A1 EP0226246 A1 EP 0226246A1 EP 86202128 A EP86202128 A EP 86202128A EP 86202128 A EP86202128 A EP 86202128A EP 0226246 A1 EP0226246 A1 EP 0226246A1
Authority
EP
European Patent Office
Prior art keywords
temperature
heat exchanger
continuous
tap water
flow heat
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Withdrawn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
EP86202128A
Other languages
English (en)
French (fr)
Inventor
Paul Vloon
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.)
NEDERLANDSE INDUSTRIELE NEFIT B V Mij
Original Assignee
NEDERLANDSE INDUSTRIELE NEFIT B V Mij
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 NEDERLANDSE INDUSTRIELE NEFIT B V Mij filed Critical NEDERLANDSE INDUSTRIELE NEFIT B V Mij
Publication of EP0226246A1 publication Critical patent/EP0226246A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • 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
    • F24H15/335—Control of pumps, e.g. on-off control
    • 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

Definitions

  • the present invention relates to a device for controlling a hot water supply, which consists of a boiler with a burner for heating a heating medium, a continuous-flow heat exchanger which contains a service water pipe for tap water, which continuous-flow heat exchanger is connected to the boiler, on the one hand, via a supply pipe and, on the other hand, via a return pipe, a circulation pump, a temperature transmitter for detecting the temperature in the supply pipe, and also a regulating device for keeping the tap water at temperature and for keeping the temperature of the heating medium in the continuous-flow heat exchanger within predetermined limits being incorporated in the heating medium circuit.
  • the regulating device for keeping the tap water at a desired temperature consists of a first thermostat, the sensor of which is incorporated in the service water pipe and, in particular, inside the continuous-flow heat exchanger at some distance from the point at which the service water pipe enters the continuous-flow heat exchanger, and of a second thermostat, the sensor of which is situated inside the continuous-flow heat exchanger in the heating medium.
  • the first thermostat the sensor of which is situated in the service water pipe, detects by means of a drop in temperature in the service water pipe that tap water is being called for and switches over the distribution element and possibly switches the burner on so that heated medium flows towards the continuous-flow heat exchanger.
  • the second thermostat serves to keep the tap water at the desired temperature during drawing-off by controlling the burner.
  • the first thermostat has a twofold function, namely, firstly to "detect" the fact that tap water is being drawn off, and secondly to keep the temperature of the heating medium inside the continuous-flow heating medium within predetermined limits if tap water is not being drawn off.
  • the second thermostat therefore only serves to keep the temperature of the tap water at a desired set value during drawing-off by controlling the burner.
  • Said known device is complicated and expensive by the use of two thermostats.
  • the object of the present invention is to simplify said known device, which is achieved according to the invention in that the regulating device consists of a single temperature transmitter which is connected to the tap pipe near the point where the latter leaves the continuous-flow heat exchanger, which temperature transmitter is connected to a control element which detects the temperature drop per unit time and if a predetermined value thereof is exceeded, sets the burner and the circulation pump in operation.
  • the control element, to which the single temperature transmitter is connected has a three-fold function:
  • the temperature transmitter is fitted near the point where the service water pipe leaves the continuous-flow heat exchanger, said three functions can be carried out by one single temperature transmitter.
  • a particularly fast regulation is obtained by detecting the temperature drop per unit time (i.e. the rate at which the temperature drops), since it is not necessary to wait until the temperature of the tap water has reached its minimum value at which the burner and the pump are switched on.
  • the control element thus distinguishes the slow cooling of the continuous-flow heat exchanger when no tap water is drawn off for a prolonged time and the rapid cooling of the temperature of the tap water as soon as some is drawn off. As a result it is possible to fit the temperature transmitter at the specified point without there being the risk that the contents of the continuous-flow heat exchanger cool down too much before the burner and the pump are switched on.
  • the temperature transmitter for detecting the temperature in the supply pipe is connected to the control element which determines the temperature rise of the heating medium per unit time and switches off the burner and the pump if the relationship between the temperature change of the heating medium and that of the tap water indicates that no heat is essentially being removed from the continuous-flow heat exchanger by the tap water.
  • the control element detects the rapid rise of the temperature of the heating medium and relates said rise to the temperature change of the tap water. From the fact that said relationship deviates from that during the drawing-off, the control element "concludes" that nothing is being drawn off and consequently switches off the burner and the pump.
  • the temperature transmitter connected to the service water pipe is fitted at some distance outside the continuous-flow heat exchanger and is connected by means of a metal strip to the supply pipe in a manner such that during the drawing-off the temperature of the tap water and, if there is no drawing-off, the temperature of the heating medium are registered.
  • the temperature transmitter can be fitted easily and cheaply.
  • a thermal contact is produced between the heating medium and the tap water by the metal strip.
  • the burner control is modulated during the drawing-off on the basis of the set temperature of the tap water.
  • the device according to the invention can also be used if the hot water supply is incorporated in a central heating system with room heating elements which are connected, on the one hand, via a three-way valve to the supply pipe and, on the other hand, to the return pipe, in which case the control element, on switching on the burner and the circulation pump, also, resets the three-way valve from circulation through the room heating elements to circulation through the continuous-flow heat exchanger and which three-way valve is reset to circulation through the room heating elements when the burner is switched off.
  • a temperature transmitter 16 which is connected to a control element 17, is fitted on the service water pipe 13 near 15.
  • the temperature transmitter 16 is fitted outside the continuous-flow heat exchanger 9 on the pipe 13.
  • the control element 17 is also in contact with the three-way valve 11, as well as with a gas regulator 19 incorporated in the gas supply pipe 2.
  • the control element is further connected to the pump 8 to switch the latter on and/or off.
  • the control element 17 is equipped in a manner such that the temperature drop of the tap water per unit time is registered. If hot water is drawn off, a rapid drop of the temperature in the service water pipe will be registered. The control element 17 responds to said rapid temperature drop by switching over the three-way valve 11, switching on the burner 3 and possibly the circulation pump 8. This has the advantage that it is not necessary to leave the switching over of the three-way valve 11 until the set minimum temperature of the tap water is reached, the switch-over being made from circulation through the room heating elements to circulation through the continuous-flow heat exchanger. If however no hot water is drawn off for a prolonged time, for example during the night, the continuous-flow heat exchanger will slowly cool down. During this slow cooling down, the control element will only respond if the said set minimum temperature is reached.
  • a temperature sensor 18 which is also connected to the control element 17 and at the same time functions as a boiler thermostat.
  • the control element 17 detects the rapid temperature rise of the heating medium and relates said rise to the temperature change of the tap water. If it follows from this relationship that no heat is being removed from the continuous-flow heat exchanger by the tap water, the control element witches the burner and the pump off and/or switches the three-way valve 11 over.
  • FIG. 2 shows another embodiment of the invention.
  • the temperature transmitter 16 is fitted outside the continuous-flow heat exchanger 9 on the pipe 13 for the tap water.
  • the temperature transmitter 19 is connected to the pipe 10 for the heating medium by means of a metal strip 20 and, in particular, in a manner such that the temperature transmitter detects the temperature of the tap water during the drawing-off and, when the drawing-off is terminated, detects the temperature of the heating medium as rapidly as possible.
  • the relationship between temperature of the heating medium and of the tap water is consequently generated by the strip 20 which provides a thermal connection between the two media.
  • Said thermal connection thus assumes the position of the arithmetic relationship between the two temperatures as discussed on the basis of Figure 1.
  • control device The operation of the control device is as follows:
  • the control element 17 thereupon switches the three-way valve 11 over, lights the burner and switches the pump on. During the drawing-off, the control element 17 provides modulating control for the burner 3 in order to keep the tap water at the desired temperature.
  • the temperature transmitter 16 consequently fulfils three tasks, namely, "detecting" that water is being drawn off, keeping the tap water at temperature during the drawing-off, and keeping the continuous-flow heat exchanger at temperature if no hot water is being drawn off. This three-fold function provides an exceptionally rapid and cheap control device, only one single temperature transmitter being necessary for measuring the temperature in the continuous-flow heat exchanger or of the water.
  • the temperature transmitter 16 could also be fitted inside the continuous-flow heat exchanger 9 in the service water pipe 13 and, in particular, near the point 15. In this case the thermal connection is formed by the heating medium itself and the metal strip 20 can be omitted.

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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
EP86202128A 1985-12-04 1986-12-01 Gerät zum Kontrollieren eines Heisswasserbereiters Withdrawn EP0226246A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8503345A NL8503345A (nl) 1985-12-04 1985-12-04 Inrichting voor het sturen van een warmwatervoorziening.
NL8503345 1985-12-04

Publications (1)

Publication Number Publication Date
EP0226246A1 true EP0226246A1 (de) 1987-06-24

Family

ID=19846961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86202128A Withdrawn EP0226246A1 (de) 1985-12-04 1986-12-01 Gerät zum Kontrollieren eines Heisswasserbereiters

Country Status (2)

Country Link
EP (1) EP0226246A1 (de)
NL (1) NL8503345A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568122A2 (de) * 1992-03-12 1993-11-03 FUGAS s.r.l. Ventilanordnung für Anlagen, die sowohl für Heizungs- als auch für Haushaltsheisswasser vorgesehen ist
GB2301423A (en) * 1995-03-18 1996-12-04 Clive Michael Perry Heat exchanger management system
GB2306631A (en) * 1995-10-28 1997-05-07 Gledhill Water Storage Domestic water heating apparatus
EP0807790A3 (de) * 1996-05-15 1998-11-18 SOLVIS Solarsysteme GmbH Anordnung und Verfahren zur Bereitstellung von warmem Brauchwasser
GB2368896A (en) * 2000-11-11 2002-05-15 Gledhill Water Storage Heat exchange system, temperature sensor arrangement and operation
EP1310746A1 (de) * 2001-11-07 2003-05-14 Siemens Building Technologies AG Vorrichtung und Verfahren zur Regelung von Thermen
EP2372260A3 (de) * 2010-03-27 2014-01-22 Robert Bosch GmbH Verfahren zur Erwärmung von Wasser nach dem Durchlaufprinzip und Wassererwärmungssystem
WO2021037311A1 (de) * 2019-08-28 2021-03-04 Viessmann Werke Gmbh & Co Kg Verfahren zum betrieb eines heizgeräts

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2434222A1 (de) * 1974-07-13 1976-01-29 Vaillant Joh Kg Umlaufwasserheizer
EP0104362A1 (de) * 1982-08-27 1984-04-04 Joh. Vaillant GmbH u. Co. Steuerverfahren für die Aufladung eines Warmwasserspeichers beziehungsweise für die Beheizung wenigstens eines Raumes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2434222A1 (de) * 1974-07-13 1976-01-29 Vaillant Joh Kg Umlaufwasserheizer
EP0104362A1 (de) * 1982-08-27 1984-04-04 Joh. Vaillant GmbH u. Co. Steuerverfahren für die Aufladung eines Warmwasserspeichers beziehungsweise für die Beheizung wenigstens eines Raumes

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568122A2 (de) * 1992-03-12 1993-11-03 FUGAS s.r.l. Ventilanordnung für Anlagen, die sowohl für Heizungs- als auch für Haushaltsheisswasser vorgesehen ist
EP0568122A3 (de) * 1992-03-12 1994-08-31 Fugas Srl
GB2301423A (en) * 1995-03-18 1996-12-04 Clive Michael Perry Heat exchanger management system
GB2306631A (en) * 1995-10-28 1997-05-07 Gledhill Water Storage Domestic water heating apparatus
GB2306631B (en) * 1995-10-28 1999-01-20 Gledhill Water Storage Improvements relating to heating apparatus
EP0807790A3 (de) * 1996-05-15 1998-11-18 SOLVIS Solarsysteme GmbH Anordnung und Verfahren zur Bereitstellung von warmem Brauchwasser
GB2368896A (en) * 2000-11-11 2002-05-15 Gledhill Water Storage Heat exchange system, temperature sensor arrangement and operation
GB2368896B (en) * 2000-11-11 2003-10-29 Gledhill Water Storage Improvements relating to heating apparatus
EP1310746A1 (de) * 2001-11-07 2003-05-14 Siemens Building Technologies AG Vorrichtung und Verfahren zur Regelung von Thermen
EP2372260A3 (de) * 2010-03-27 2014-01-22 Robert Bosch GmbH Verfahren zur Erwärmung von Wasser nach dem Durchlaufprinzip und Wassererwärmungssystem
WO2021037311A1 (de) * 2019-08-28 2021-03-04 Viessmann Werke Gmbh & Co Kg Verfahren zum betrieb eines heizgeräts

Also Published As

Publication number Publication date
NL8503345A (nl) 1987-07-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19871229

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Inventor name: VLOON, PAUL