EP1486735B1 - Systeme combiné de chauffage d'eau et de chauffage central - Google Patents

Systeme combiné de chauffage d'eau et de chauffage central Download PDF

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Publication number
EP1486735B1
EP1486735B1 EP04253103A EP04253103A EP1486735B1 EP 1486735 B1 EP1486735 B1 EP 1486735B1 EP 04253103 A EP04253103 A EP 04253103A EP 04253103 A EP04253103 A EP 04253103A EP 1486735 B1 EP1486735 B1 EP 1486735B1
Authority
EP
European Patent Office
Prior art keywords
hot water
water
heating
heating system
circuit
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 - Lifetime
Application number
EP04253103A
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German (de)
English (en)
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EP1486735A1 (fr
Inventor
Roy Walter Hunter
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.)
Eco-Pulse Ltd
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Eco-Pulse Ltd
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Publication date
Priority claimed from GBGB0313350.1A external-priority patent/GB0313350D0/en
Application filed by Eco-Pulse Ltd filed Critical Eco-Pulse Ltd
Priority to PCT/GB2004/005070 priority Critical patent/WO2005103573A1/fr
Publication of EP1486735A1 publication Critical patent/EP1486735A1/fr
Application granted granted Critical
Publication of EP1486735B1 publication Critical patent/EP1486735B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • 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

Definitions

  • the present invention relates to combined hot water and heating systems.
  • Combined hot water and heating systems are commonly provided in homes. Such systems allow provision of hot water for use in radiators, to heat the home, and for heating water for use in other domestic applications, for example washing, from the same hot water supply.
  • a conventional combined hot water and heating system has a boiler, which takes in cold water via an inlet and supplies hot water via an outlet, and a pump for pumping hot water from the boiler around the combined hot water and heating system.
  • a combined hot water and heating system may have several water circuits.
  • a typical system has two circuits. The first, a heating circuit, allows water from the boiler to circulate through a series of radiators. Control of the supply of hot water passing through the heating circuit allows controlled heating of the house.
  • the second circuit is a hot water circuit.
  • a portion of the hot water circuit passes through a hot water tank.
  • This portion of the hot water circuit is usually coiled to provide a better thermal coupling between water in the hot water circuit and water to be heated in the hot water tank.
  • a combined hot water and heating system according to the preamble of claim 1 is known from the document GB2320108 .
  • a boiler is shut down when a thermostat supplies a shut down signal. Once the boiler is shut down, a certain time interval must then elapse between the turning off and the refiring of the boiler.
  • DE3538934 (and related document DE3539328 ) relates to a central heating system with a variable thermostat threshold setting.
  • a boiler and pump are operated independently in dependence on the measured temperature relative to the thermostat threshold, and in dependence on anticipated changes in the thermostat threshold.
  • FR2465164 relates to a heating installation having a three ways valve between a radiator circuit, heat exchanger, and a boiler.
  • US 4,671,457 discloses a thermostat which is arranged to control the timing and intensity of operation of a burner in order to regulate temperature of a heated space.
  • the system selects the duration and intensity of heating of by the burner to provide a roughly constant temperature.
  • This system has a disadvantage in that directly pulsing the burner may cause increased wear of the burner components.
  • a combined hot water and heating system comprising a hot water supply means and a pump for pumping water from the hot water supply means to a first water circuit and a second water circuit, wherein supply of hot water from the hot water supply means to the first and second water circuits is regulated by at least one valve means (H, HW), the system comprising control means, which comprises a timer operable to set predetermined heating periods and predetermined heat dissipation periods, characterized in that said control means cause the at least one valve means to prevent supply of hot water from the hot water supply means to at least one of said first and second water circuits when the hot water supply means is in operation and during the heat dissipation periods.
  • H, HW valve means
  • Hot water may only be supplied to the water circuits during the predetermined heating periods. This results in a pulsing of the supply of hot water to the water circuits when hot water is needed.
  • the applicant has found that pulsed supply of hot water to water circuits of a combined hot water and heating system results in greater energy efficiency.
  • the at least one valve means may comprise a valve for each water circuit.
  • Each water circuit may have an associated thermostat and supply of hot water to each water circuit by the at least one valve means may be controlled in dependence on the output of the thermostat associated with that water circuit.
  • the combined hot water and heating system may be a domestic hot water and heating system, the first circuit being associated with provision of hot water for domestic use and the second water circuit being associated with space heating and wherein the thermostat associated with the first water circuit is a hot water thermostat and the thermostat associated with the second water circuit is a room thermostat.
  • the duration of the predetermined heating periods and the duration of the predetermined cooling periods may be user selectable.
  • the duration of the predetermined periods may be user selectable between 2 minutes and 30 minutes. Preferably, the predetermined periods may be user selectable between 5 minutes and 10 minutes.
  • the combined hot water and heating system may be arranged to allow user selection of a continuous heating mode.
  • the combined hot water and heating system When operating in the continuous heating mode the combined hot water and heating system would act as a conventional combined hot water and heating system, providing hot water to the water circuits continuously.
  • Figure 1 shows a combined hot water and heating system 1 in a house comprising a hot water supply means in the form of a boiler 10 and a pump 11.
  • the pump 11 is connected to the boiler 10 and arranged to pump hot water from the boiler 10 around the system 1.
  • the system 1 comprises a heating circuit 2 and a hot water circuit 3.
  • the circuits 2 and 3 form a common portion passing through the boiler 10 and the pump 11.
  • Zone valve H controls supply of hot water to the heating circuit 2.
  • Zone valve HW controls hot water supply to the hot water circuit 3.
  • the heating comprises three radiators 21 arranged in the heating circuit.
  • Each radiator 21 is provided with an inlet attached to a first half of the heating circuit 2 and with an outlet attached to a second half of the heating circuit 2.
  • the hot water circuit 3 comprises a coiled portion of pipe 31. This coiled portion of pipe is arranged inside a hot water tank 4 which is arranged to supply hot water to the house.
  • the hot water tank 4 is supplied at its lower end with cold water from a cold water tank 5. Hot water may be extracted from the hot water tank to supply taps 6.
  • the combined hot water and heating system 1 also has a expansion tank 7 which is arranged to supply water to the heating and hot water circuits 2 and 3 as necessary.
  • the expansion tank compensates for any loss of water from the water circuits 2 and 3 due to leaks and reduces the accumulation of air in the circuits.
  • An expansion pipe (not shown) runs from the hot water tank to above the expansion tank, allowing water to be discharged into the expansion tank 7.
  • the expansion pipe allows for expansion of water in the hot water tank.
  • a second expansion pipe (not shown) runs from the water circuits 2 and 3 to above the expansion tank, allowing water to be discharged into the expansion tank 7.
  • the second expansion pipe allows for expansion of water in the water circuits 2 and 3.
  • the cold water tank 5 and expansion tank 7 are shown schematically in Figure 6 . Both of these tanks are usually located above the remainder of the combined hot water and heating system 1.
  • the system 1 also comprises three thermostats which are used in controlling the operation of the system.
  • a hot water thermostat A is provided in the hot water tank 4 to monitor the temperature of the water in the hot water tank.
  • a boiler thermostat B is provided in the boiler 10 to monitor the temperature of water in the boiler.
  • a room thermostat C is provided in an appropriate room of the house to monitor the temperature of the house.
  • the Zone valves H and HW, the boiler 10 and the pump 11 are controlled by an electronic control system 8.
  • the electronic control system 8 comprises a timer which sets heating on periods and heating off periods.
  • Control of operation of the boiler 10 is illustrated in Figure 2 .
  • the temperature of water in the boiler 10 is monitored by the boiler thermostat B. It is important that the water in the boiler 10 is not overheated as boiling of water in the boiler may cause damage to the system 1.
  • the control system 8 causes the boiler 10 to heat the water. If the water in the boiler 10 is above the predetermined desired temperature, the control system 8 switches the boiler 10 off and allows the water in the boiler to cool.
  • FIG. 3 illustrates control of the operation of the pump 11. Passage of water around the water circuits 2 and 3 is determined by the zone valves H and HW. If both of these valves are closed then there is no where for water to go beyond the pump 11. Accordingly, the pump 11 operates to pump water around the system 1 whilst one of the two zone valves H and HW is open. If both zone valves H and HW are closed the control system 8 switches the pump 11 off.
  • Figure 4 illustrates control of zone valve HW.
  • the hot water thermostat A monitors temperature of water in the hot water tank 4.
  • the control system 8 is measuring heating on and heating off periods each of a predetermined duration. If the temperature of water in the hot water tank 4 is below a predetermined desired temperature and the control system 8 is measuring a heating on period, the zone valve HW is opened and hot water passes around the hot water circuit 3. If either the temperature in the hot water tank 4 is above the predetermined desired temperature or the control system 8 is measuring a heating off period the zone valve HW is closed.
  • control system 8 provides hot water to the hot water circuit 3 in a pulsed manner.
  • Figure 5 illustrates control of the zone valve H.
  • the room thermostat C monitors the temperature of an appropriate room in the house. If the temperature of room is below a predetermined desired temperature and the control system 8 is measuring a heating on period, the zone valve H is opened and hot water passes around the heating circuit 2. If either the temperature in the room is above the predetermined desired temperature or the control system 8 is measuring a heating off period the zone valve H is closed. In this manner, when the room is below the predetermined desired temperature and needs heating, the control system 8 supplies hot water to the radiators 21 in a pulsed manner in order to heat the room.
  • Figure 6 is a diagram schematically shows the structure of an electronic control system 8 connected to a heating system 40 incorporating the present invention.
  • the pre-existing heating system 40 is of the same type described with reference to Figure 1 .
  • Corresponding features shown in the two figures are indicated with corresponding reference numerals. Description of these features is omitted for the sake of brevity.
  • the Pump 11 and zone valves H and HW are arranged as previously described. However, a connector block 41 (not shown in Figure 1 ) is provided to supply 240 V electricity to the pump 11 and the zone valves H and HW.
  • the electronic control system 8 is supplied with power from a 240 V AC supply 90. Electricity from the power supply 90 is converted to 120 V and rectified in the electronic control system 8 to supply an electronics control unit 81.
  • the electronics control unit 81 has two inputs 82 and 83 for receiving information from a user.
  • the input 82 allows a user to set the heating on period for use in the operation of the system as described above with reference to Figures 2 to 5 .
  • the input 83 allows a user to set the heating off period.
  • the electronics control unit 81 is connected to a relay 84, which controls a pair of switches 85 and 86.
  • the switches 85 and 86 are connected between the pre-existing heating system between the power supply from the connector block 41 and the zone valves H and HW.
  • the switches 85 and 86 may be opened and closed to control power supply from the connector block 41 to the zone valves H and HW.
  • Over-ride switches 87 and 88 are provided to allow power supplied from the connector block 41 to by-pass switches 85 and 86 respectively to reach zone valves H and HW.
  • control unit 81 sends signals to the relay 84 causing the relay 84 to open and close the switches 85 and 86 thereby controlling operation of zone valves H and HW.
  • the control unit 81 causes the switches 85 and 86 to open and close supplying power to the zone valves H and HW so that the pre-existing central heating system operates as described with reference to Figures 4 and 5 .
  • the control system 8 allows retro-fitting of existing combined hot water and heating systems.
  • the control system takes advantage of existing electronics in the heating system to control the pump 11.
  • zone valves H and HW are both closed, the existing electronics shut off the pump 11. Otherwise, when at least one zone valve is open, the pump 11 is operational.
  • the control unit 8 may be adapted to take advantage of the electronics pre-existing in a particular combined hot water and heating system to which it is to be fitted.

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

Claims (7)

  1. Système de chauffage et d'eau chaude combiné comprenant des moyens d'alimentation d'eau chaude (10) et une pompe (11) pour pomper l'eau des moyens d'alimentation d'eau chaude jusqu'à un premier circuit d'eau (2) et un deuxième circuit d'eau (3) et au moins un moyen de soupape (H, HW), dans lequel l'alimentation de l'eau chaude des moyens d'alimentation d'eau chaude aux premier et deuxième circuits d'eau est régulée par le au moins un moyen de soupape (H, HW), le système comprenant des moyens de commande (8) qui comprennent une minuterie pouvant fonctionner pour déterminer des périodes de chauffage prédéterminées et des périodes de dissipation de chaleur prédéterminées, caractérisé en ce que :
    lesdits moyens de commande (8) amènent le au moins un moyen de soupape à empêcher l'alimentation d'eau chaude des moyens d'alimentation d'eau chaude (10) à au moins l'un desdits premier (2) et deuxième (3) circuits d'eau lorsque les moyens d'alimentation d'eau chaude (10) sont en fonctionnement afin de chauffer l'eau et pendant les périodes de dissipation de chaleur.
  2. Système de chauffage et d'eau chaude combiné selon la revendication 1, dans lequel le au moins un moyen de soupape comprennent une soupape pour chaque circuit d'eau du système.
  3. Système de chauffage et d'eau chaude combiné selon la revendication 1 ou la revendication 2, dans lequel chaque circuit d'eau a un thermostat associé qui commande l'alimentation de l'eau chaude vers chaque circuit d'eau en actionnant le au moins un moyen de soupape en fonction de la sortie du thermostat associé à ce circuit d'eau pendant les périodes de chauffage.
  4. Système de chauffage et d'eau chaude combiné selon la revendication 3, dans lequel le système de chauffage et d'eau chaude est un système de chauffage d'eau chaude domestique, le premier circuit d'eau fournit l'eau chaude pour l'usage domestique et le deuxième circuit d'eau fournit le chauffage de l'espace et dans lequel le thermostat associé au premier circuit d'eau est un thermostat d'eau chaude et le thermostat associé au deuxième circuit d'eau est un thermostat d'ambiance.
  5. Système de chauffage et d'eau chaude combiné selon l'une quelconque des revendications précédentes, dans lequel la durée des périodes de chauffage prédéterminées et la durée des périodes de refroidissement prédéterminées peuvent être sélectionnées par l'utilisateur.
  6. Système de chauffage et d'eau chaude combiné selon la revendication 5, dans lequel la durée des périodes prédéterminées peut être sélectionnée pour être comprise entre 2 minutes et 30 minutes.
  7. Système de chauffage et d'eau chaude combiné selon la revendication 5, dans lequel la durée des périodes prédéterminées peut être sélectionnée pour être comprise entre 5 minutes et 10 minutes.
EP04253103A 2003-06-10 2004-05-26 Systeme combiné de chauffage d'eau et de chauffage central Expired - Lifetime EP1486735B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/GB2004/005070 WO2005103573A1 (fr) 2004-04-26 2004-12-01 Systeme combine de production d'eau chaude et de chauffage

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0313350.1A GB0313350D0 (en) 2003-06-10 2003-06-10 Space Heaters
GB0313350 2003-06-10
GB0409238 2004-04-26
GB0409238A GB2402734B (en) 2003-06-10 2004-04-26 Combined hot water and heater system

Publications (2)

Publication Number Publication Date
EP1486735A1 EP1486735A1 (fr) 2004-12-15
EP1486735B1 true EP1486735B1 (fr) 2010-10-13

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EP04253103A Expired - Lifetime EP1486735B1 (fr) 2003-06-10 2004-05-26 Systeme combiné de chauffage d'eau et de chauffage central

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180416B (zh) * 2014-08-22 2016-07-06 中建三局集团有限公司 生活区临建房冬季供暖系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1392333A (fr) * 1964-05-06 1965-03-12 Burger Eisenwerk A G Appareil de chauffage central
DE2937067A1 (de) * 1979-09-13 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Heizungsanlage mit einem umlaufenden waermetraeger
DE3539328C2 (de) * 1984-11-16 1994-04-14 Vaillant Joh Gmbh & Co Verfahren zum Aufheizen wenigstens eines Raumheizkreises und eines Brauchwasserspeichers
DE3538934A1 (de) * 1984-11-16 1986-05-28 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Verfahren zur absenkung eines temperaturniveaus
DE3524230A1 (de) 1985-07-06 1987-01-08 Honeywell Bv Einrichtung zur regelung der raumtemperatur
GB2320108A (en) * 1996-12-07 1998-06-10 Robert John Colin Matthews Pause Controller

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