EP0001826B1 - Installation de chauffage à eau chaude - Google Patents

Installation de chauffage à eau chaude Download PDF

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Publication number
EP0001826B1
EP0001826B1 EP78101267A EP78101267A EP0001826B1 EP 0001826 B1 EP0001826 B1 EP 0001826B1 EP 78101267 A EP78101267 A EP 78101267A EP 78101267 A EP78101267 A EP 78101267A EP 0001826 B1 EP0001826 B1 EP 0001826B1
Authority
EP
European Patent Office
Prior art keywords
switch contact
temperature
hot water
switch
valve
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.)
Expired
Application number
EP78101267A
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German (de)
English (en)
Other versions
EP0001826A1 (fr
Inventor
Willi Hecking
Arend Sasserath
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.)
Hans Sasserath GmbH and Co KG
Original Assignee
Hans Sasserath GmbH and Co KG
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Filing date
Publication date
Application filed by Hans Sasserath GmbH and Co KG filed Critical Hans Sasserath GmbH and Co KG
Publication of EP0001826A1 publication Critical patent/EP0001826A1/fr
Application granted granted Critical
Publication of EP0001826B1 publication Critical patent/EP0001826B1/fr
Expired 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • 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
    • F24H15/20—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
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners

Definitions

  • the invention relates to a hot water heating system comprising: a hot water generator which has a heat source that can be switched on electrically via a control circuit, a heating circuit with flow, radiator and return, temperature-controlled radiator valves being provided on the radiators, by means of which the water flow through the individual radiators in dependence of the room temperatures and the setpoints set on the radiator valves, a circulation pump between the hot water generator and the flow and a device that responds to the differential pressure between the flow and return.
  • the hot water generator is usually a boiler.
  • the heat source is an oil burner with a burner motor, whereby the oil burner and the burner motor can be switched on and off via the control circuit.
  • a temperature sensor usually responds to the temperature of the water supplied to the heating circuit, the "flow temperature", that is, the temperature of the boiler water in a boiler. This temperature is regulated to a constant value in that the control contact of the temperature sensor lies in the control circuit of the oil burner and thus switches the oil burner on when the boiler water temperature falls below a lower limit and switches it off when an upper limit is exceeded.
  • thermostatic valves In order to take into account the different heat requirements in the different rooms of a building or apartment, temperature-controlled radiator valves (“thermostatic valves”) are known on the individual radiators, which more or more regulate the flow of warm heating water through each individual radiator in accordance with a temperature setpoint set on the radiator valve throttle less.
  • the resulting flow resistance of the heating system changes depending on the setting of the radiator valves and e.g. heat demand given by the outside temperature or solar radiation.
  • the circulation pump would try to push the same amount of water through the throttled heating system essentially unchanged, the pressure between the flow and the return increasing accordingly. But that would not be the effect aimed at by the temperature-controlled radiator valves, since the throttling means that less water should flow through the heating system at the regulated flow temperature. Undesirable flow noises would also result with low heat requirements and strongly throttled radiator valves. For this reason, a differential pressure regulator is provided between the flow and the return. This contains an overflow valve which opens when a predetermined response point of the differential pressure is exceeded and more or less releases a short-circuit connection between the flow and the return past the heating system. The overflow valve is controlled by the differential pressure, and when the differential pressure rises, the overflow valve is opened further accordingly. .
  • the differential pressure between flow and return is kept essentially constant, so that throttling the passage through the temperature-controlled radiator valves brings about a corresponding reduction in the heating water flowing through the heating system and emitting heat to the room air. An approximately complementary portion of the heating water flows back to the return via the short-circuit line without giving off heat.
  • the temperature of the heating water is kept at a constant value in the manner described.
  • the temperature of the heating water is adapted to the respective weather conditions by a control device which responds to the outside temperature.
  • the temperature of the heating water in the heating circuit is therefore lower at high outside temperatures and low heat requirements and higher at low outside temperatures. So the temperature of the heating water flowing in the radiators is already roughly adapted to the heat requirement.
  • the room temperature in the individual rooms is also controlled via temperature-controlled radiator valves. Because of the adaptation of the temperature of the heating water to the heat requirement, these radiator valves no longer work in the vicinity of their closed position and ensure a sufficient flow of heating water through the radiators, so that the radiators are evenly flowed through and evenly heated.
  • the invention has for its object to provide a hot water heating system of the type defined in such a way that the temperature of the heating water can be adapted to the heat requirement with as little effort as possible.
  • this object is achieved in that a switching contact is provided on the device responsive to the differential pressure, which opens when the differential pressure exceeds a predetermined response point, and in that this switching contact is in the control circuit of the heat source.
  • the invention takes advantage of the fact that the differential pressure drops below the response point when the radiator valves are opened sufficiently to ensure a constant flow of heating water through the radiators. If the heating water temperature is too high for the heat demand, the radiator valves move to a more restricted position due to the increase in the room temperature. This in turn causes an increase in the differential pressure between flow and return and thus an exceeding of the response point of the device responsive to the differential pressure. This opens the switch contact provided on the device. This opens the control circuit and the heat source, e.g. an oil burner, turned off. The temperature of the heating water now drops. In order to cover the heat requirement and to maintain the selected room temperature, the temperature-controlled radiator valves must therefore open further, so that a stronger current of the now cooler heating water flows through the radiators.
  • the temperature of the heating water will have dropped so far that the temperature-controlled radiator valves work again in their optimal working range to cover the specified heat requirement.
  • the resulting flow resistance of the heating circuit and thus also the differential pressure between the flow and return have dropped so far that the response point of the device is again below. This again requires the switching contact provided on the differential pressure regulator to be closed and, since the control contact is closed anyway when the temperature of the heating water is reduced, the heat source is switched on again.
  • the temperature of the heating water is thus kept at such a value that the temperature-controlled radiator valves operate in a favorable working range by opening and closing the switching contact provided on said device. If the radiator valves work in this area, the differential pressure is below the response point. Switching on the heat source causes an increase in the temperature of the heating water and thus the room temperature, which in turn initiates a closing movement of the radiator valves and thus an exceeding of the response point and opening of the switching contact. It is achieved by a simple additional switch contact an adaptation of the temperature of the heating water to the heat requirement and thus a perfect temperature control without the disadvantages described above.
  • 10 denotes a boiler which represents a hot water generator and has an oil burner 12 as a heat source.
  • a first temperature sensor 14 is provided on the boiler 10, which responds to the temperature of the heating water and through which a control contact 16 (FIG. 1) can be actuated.
  • the temperature sensor 14 can be set so that it opens the control contact 16 at a temperature of 80 ° C, while the control contact 16 remains closed below this temperature.
  • a second temperature sensor 18 is also provided on the boiler 10, by means of which a switch contact 20 can be actuated.
  • the second temperature sensor 18 opens the switch contact 20 at a temperature of 105 ° C and acts as a temperature limiter.
  • a safety valve provided on the boiler 10 is designated.
  • the boiler 10 is connected to a flow 26 via a circulation pump 24.
  • a conventional pressure compensation vessel 28 is connected between the boiler 10 and the circulation pump 24.
  • a return is designated by 30, while the radiators or radiators, which lie between the flow 26 and the return 30, are symbolized by a heat consumer 32.
  • Flow 26, heating element 32 and return 30 form a heating circuit 34.
  • Each heating element 32 is preceded by a temperature-controlled heating element valve 36, which is more or less opened by a temperature sensor 38 which responds to the room temperature. When the room temperature drops, the radiator valve 36 is opened further to pass more heating water through the radiator in question, when the room temperature rises, the radiator valve 36 is throttled more.
  • a differential pressure controller 40 is located between the flow 26 and the return 30.
  • the differential pressure controller 40 contains an overflow valve 42 controlled by the differential pressure, which is arranged in a short-circuit line 44 which runs around the heater 32 and runs between the flow 26 and the return 30.
  • the overflow valve 42 is closed at low differential pressures between flow 26 and return 30 and begins to open at a predetermined response point of the differential pressure.
  • the overflow valve 42 then opens further the higher the differential pressure becomes.
  • the differential pressure is thus kept essentially constant, regardless of how far the temperature-controlled radiator valves 36 are opened. If the temperature-controlled radiator valves 36 throttle the heating water circulation through the radiators or part of the radiators 32 with a low heat requirement, part of the delivery volume of the circulation pump 24 flows via the short-circuit line 44 directly to the return.
  • a switching contact 46 is now provided on the differential pressure regulator 40, which is closed when the overflow valve 42 is in its closed position (or a suitable predetermined position) and opens when the overflow valve 42 moves from this position into an open position.
  • the switch contact is located. 46 in series with the switching contact 20 of the temperature limiter and the control contact 16 in the control circuit 50 of the oil burner 12.
  • the overflow valve 42 opens because the temperature of the heating water is too high for the existing heat requirement and therefore the radiator valves 36 are throttled beyond their optimal working range, this causes the oil burner 12 to be switched off.
  • the device which responds to the differential pressure is used here the normally available differential pressure regulator, which only needs to be equipped with an additional switch contact.
  • Fig. 3 also shows in connection with Fig. 2 a variant of the arrangement described, which allows a lowering of the temperature of the heating water during the night time.
  • a differential pressure switch 52 is arranged in parallel with the differential pressure regulator 40 between the flow 26 and the return 30.
  • the differential pressure switch 52 opens a further switching contact 54 when a predetermined response point of the differential pressure is exceeded, the response point of the differential pressure switch 52 being below the aforementioned response point of the differential pressure regulator 40.
  • the switch contact 54 of the differential pressure switch 52 lies in series with the switching contact 46 of the differential pressure regulator 40 in the control circuit 50 of the oil burner 12.
  • the switching contact 56 of a time switch 58 is connected in parallel with the switching contact 54 of the differential pressure switch 52. In Fig. 3, this is indicated by the dashed line 60 and 62, respectively.
  • the switch contact 54 of the differential pressure switch 52 is bridged by the closed switch contact 56 of the time switch 58.
  • the switching state of the switching contact 54 then has no influence on the temperature control and the temperature of the heating water is determined in the manner described by the differential pressure controller 40 and the switching contact 46.
  • the burner is already switched off when the differential pressure exceeds the lower response point of the differential pressure switch, i.e. the temperature-controlled radiator valves are closed less than is necessary to respond to the differential pressure regulator 40 and to open the overflow valve 42 is.
  • the temperature of the circulating heating water is reduced during the night, with an average room temperature being set at which the radiator valves are opened further, which is lower than the room temperature regulated during daytime operation.
  • Fig. 6 shows a hot water heating system, which is also set up for the preparation of hot domestic water. Corresponding parts are given the same reference numerals in FIG. 6 as in FIG. 3 and are not described again below.
  • a heat exchanger 64 through which the heating water flows and which is arranged in series with a thermostatically controlled valve 66 between the feed 26 and the return 30 is provided as the water heater for preparing hot domestic water.
  • the valve 66 is controlled by a heat sensor 68 as a function of the hot water temperature in the heat exchanger 64.
  • a second switch contact 70 can be controlled, which is parallel to the switch contact 46 of the device responsive to the differential pressure, namely the differential pressure regulator 40, in the control circuit 50 and when the valve is fully opened 66 closes.
  • the heat sensor 68 opens the valve 66 in order to conduct heating water through the heat exchanger 64 to a greater extent and to keep the hot water temperature at the desired value .
  • the switch contact 70 closes, whereby the oil burner 12 is switched on even when the switch contact 46 is open. After the tapping process has ended, the switching contact 70 advantageously opens before the valve 66 is completely closed and thus switches off the oil burner 12. Then the residual heat stored in the circulating heating water is still transferred to the process water in the heat exchanger 64.
  • the heat exchanger 64 with the switch contact 70 is used at the same time in order to reduce the temperature of the heating water during the night.
  • the switch contact 56 of a timer 58 connected in series.
  • the second switch contact 70 which is controlled together with the thermostatically controlled valve 66, is connected in parallel with this series connection.

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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)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Claims (7)

1. Installation de chauffage à eau chaude comprenant: un appareil de production d'eau chaude (10), qui comporte une source de chaleur (12) pouvant être mise en marche électriquement au moyen d'un circuit de commande (50), un circuit de chauffage (34) avec conduite de départ (26), radiateurs (32), et conduite de retour (30), des vannes thermostatiques (36) commandées par la température étant prévues sur les radiateurs (32), et permettant le réglage du débit d'eau dans les radiateurs individuels en fonction des températures ambiantes et des valeurs de consigne réglées sur les vannes thermostatiques (36), une pompe de circulation (24) entre l'appareil de production d'eau chaude (10) et la conduite de départ (26), et un dispositif (40) réagissant à la pression différentielle entre la conduite de départ (26) et la conduite de retour (30), charactérisée en ce que sur le dispositif (40) réagissant à la pression différentielle est prévu un contact de commutation (46), qui ouvre lorsque la pression differentielle dépasse une valeur de fonctionnement prédéterminée, et en ce que ce contact de commutation (46) se trouve dans le circuit de commande (50) de la source de chaleur (12).
2. Installation de chauffage à eau chaude suivant la revendication 1, charactérisée en ce que le dispositif (40) réagissant à la pression différentielle est un régulateur de pression différentielle, qui est monté entre la conduite de départ (26) et la conduite de retour (30), et qui est pourvu d'une vanne de trop-plein (42), et par lequel, en fonction de la pression différentielle entre la conduite de départ (26) et la conduite de retour (30), lors d'un dépassement de la valeur de fonctionnement considérée, une liaison de court-circuit s'étandant parallèlement aux radiateurs (32) peut être plus ou moins ouverte, et en ce que le contact de commutation (46) est fermé lorsque la vanne de trop-plein (42) est fermée, et s'ouvre également lorsque cette dernière s'ouvre.
3. Installation de chauffage à eau chaude suivant la revendication 2, charactérisée en ce que dans le circuit de commande (50) est, en outre, disposé le contact de réglage (16) d'un capteur de température (14) réagissant à la température de la conduite de départ.
4. Installation de chauffage à eau chaude suivant l'une quelconque des revendications 1 à 3, charactérisée en ce que, comme dispositif de production d'eau chaude pour la production d'eau chaude sanitaire, est prévu un échangeur de chaleur (64), traversé par l'eau chaude, -monté en série avec une vanne (66) commandée thermostatiquement, entre la conduite de départ (26) et la conduite de retour (30), la vanne (66) étant commandée par la température d'eau sanitaire dans l'échangeur de chaleur (64), et en ce que, ensemble avec la vanne (66) commandée thermostatiquement, un deuxième contact de commutation (70) peut être commandé, ce contact (70) étant mont é parallèlement, dans le circuit de commande (50), au contact de commutation (46) du dispositif (40) réagissant à la pression différentielle, et fermant lorsque la vanne (66) est complètement ouverte.
5. Installation de chauffage à eau chaude suivant la revendication 4, charactérisée en ce que le deuxième contact de commutation (70) ouvre avant la fermeture complète de la vanne (66) commandée thermostatiquement.
6. Installation de chauffage à eau chaude suivant l'une quelconque des revendications 2 ou 3, charactérisée en ce que, parallèlement au régulateur de pression différentielle (40), est monté, entre la conduite de départ (26) et la conduite de retour (30), un interrupteur à pression différentielle (52), qui, lors d'un dépassement d'une valeur de fonctionnement prédéterminée de la pression différentielle, ouvre un autre contact de commutation (54), la valeur de fonctionnement de l'interrupteur à pression différentielle (52) se situant sous la valeur de fonctionnement du régulateur de pression différentielle (40), en ce que le contact de commutation (54) de l'interrupteur à pression différentielle (52) est monté en série avec le contact de commutation (46) du régulateur de pression différentielle (40), et en ce que, parallèlement au contact de commutation (54) de l'interrupteur à pression différentielle (52), est monté le contact de commutation (56) d'une horloge de commutation (58).
7. Installation de chauffage à eau chaude, suivant la revendication 4, charactérisée en ce que le contact de commutation (56) d'une horloge de commutation (58) est monté en série avec le contact de commutation (46) du dispositif (40) réagissant à la pression différentielle, et en ce que le deuxième contact de commutation (70), qui est commandé ensemble avec la vanne (66) commandée thermostatiquement, est connecté enparallèle à ce montage en série.
EP78101267A 1977-11-09 1978-10-31 Installation de chauffage à eau chaude Expired EP0001826B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2750098 1977-11-09
DE2750098A DE2750098C2 (de) 1977-11-09 1977-11-09 Warmwasser-Heizungsanlage

Publications (2)

Publication Number Publication Date
EP0001826A1 EP0001826A1 (fr) 1979-05-16
EP0001826B1 true EP0001826B1 (fr) 1980-09-17

Family

ID=6023347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101267A Expired EP0001826B1 (fr) 1977-11-09 1978-10-31 Installation de chauffage à eau chaude

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EP (1) EP0001826B1 (fr)
AT (1) AT374907B (fr)
DE (1) DE2750098C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829415A1 (de) * 1978-07-05 1980-01-24 Sasserath & Co Kg H Warmwasser-heizungsanlage
DE2931739C2 (de) * 1979-08-04 1984-07-19 F.W. Oventrop Arn. Sohn Kg, 5787 Olsberg Überströmventil zum Einbau in Warmwasserheizungsanlagen
EP0027827B1 (fr) * 1979-10-06 1983-05-25 Hans Sasserath & Co Kg Système de chauffage à eau chaude
DE3009790A1 (de) * 1980-03-14 1981-09-24 Hans Sasserath & Co Kg, 4052 Korschenbroich Warmwasser-heizungsanlage
US4381075A (en) * 1981-12-17 1983-04-26 Thermonic Corp. Microprocessor based controller for heating system
DE3202168A1 (de) * 1982-01-25 1983-08-04 Siemens AG, 1000 Berlin und 8000 München Regeleinrichtung fuer eine warmwasser-zentralheizung
AT394426B (de) * 1989-12-15 1992-03-25 Vaillant Gmbh Ueberstroemventil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH501192A (de) * 1968-06-15 1970-12-31 Troesch Hans A Dr Ing Verfahren zum Regeln von Heizungsanlagen und Heizungsanlage zur Ausführung des Verfahrens
DE2216464A1 (de) * 1972-04-06 1973-10-11 Gerhard Dipl Ing Eckerle Steuer- und regeleinrichtung zur optimalen erfassung der waermemenge bei der messung mit waermezaehlern und waermemengenmessern
DE2311691A1 (de) * 1973-03-09 1974-09-19 Vaillant Joh Kg Regeleinrichtung fuer eine heizungsanlage
DE2348755C3 (de) * 1973-09-28 1980-01-03 Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden Steuereinrichtung für Heizungsanlagen

Also Published As

Publication number Publication date
DE2750098A1 (de) 1979-05-10
EP0001826A1 (fr) 1979-05-16
AT374907B (de) 1984-06-12
DE2750098C2 (de) 1986-09-04
ATA767878A (de) 1983-10-15

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