EP0311488B2 - Gas boiler regulation device - Google Patents
Gas boiler regulation device Download PDFInfo
- Publication number
- EP0311488B2 EP0311488B2 EP88402460A EP88402460A EP0311488B2 EP 0311488 B2 EP0311488 B2 EP 0311488B2 EP 88402460 A EP88402460 A EP 88402460A EP 88402460 A EP88402460 A EP 88402460A EP 0311488 B2 EP0311488 B2 EP 0311488B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- water
- circuit
- exchanger
- return
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000013021 overheating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
- F23N1/082—Regulating fuel supply conjointly with another medium, e.g. boiler water using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/12—Integration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/19—Measuring temperature outlet temperature water heat-exchanger
Definitions
- the invention relates to a gas boiler regulating device using a circulation pump which supplies a circuit of radiators from a heat exchanger, a device by which a stable operation of the appliance is ensured, even for requirements lower than the minimum power.
- regulating devices allow the regulation of the water temperature according to the size of the installation and the power demanded. .
- it must permanently receive information on the temperature of the water passing through the heat exchanger and thus be able, depending on the flow rate, to interpret these indications in the sense of a command to open or gradually close the gas supply to the burner.
- One or more temperature sensors are then placed at the inlet or at the outlet of the exchanger, for detecting respectively the temperature of the water returning from the radiators or that of the hot water supplied by the exchanger, as described in DE-C2 3538 934.
- the subject of the invention is a new regulation which eliminates these drawbacks, which combines the advantages of each of the regulations on the departure and on the return while avoiding placing a temperature sensor, both on the departure and on the return of the circuit that is to say downstream and upstream of the heat exchanger.
- the invention therefore relates to a device for regulating a gas boiler comprising a heat exchanger heated by a gas burner supplied by a solenoid valve, said solenoid valve being itself actuated by a microprocessor regulating device, and comprising a hot water starting circuit leaving said exchanger to supply radiators under the action of a circulation pump and returning to said exchanger, a temperature sensor being provided on the starting pipe at the outlet of the exchanger, device according to which said sensor is a single sensor arranged in connection with an integrator and a regulating device for providing indications on the actual temperature of the hot water on the flow circuit before the burner stops and for deducing the temperature that 'would have the return water on the return circuit upstream of the exchanger from an indication of the water temperature on the circuit flow, taken after the burner has stopped and after a determined period of circulation of unheated water in the circuits, and according to which the temperature detected by the sensor is applied to the integrator which calculates the temperature difference between the water from the outgoing circuit and that from the return circuit.
- a gas boiler 1 such as a heating body 2 constituting the heat exchanger, heated by a burner 3, itself supplied with gas by means of a solenoid valve. 4.
- a circuit 5 for the start of hot water supplied by the exchanger feeds a plurality of radiators 6, the water returning to the exchanger by a return circuit 7 in which there is a circulation pump 8.
- a temperature sensor 9 is placed on the circuit 5 just downstream of the exchanger 2.
- the solenoid valve 4 is actuated by a microprocessor-based regulating device 10 to which the temperature detected by the sensor 9 is applied and which controls the gas inlet 14 to the solenoid valve 4 via a current generator 11.
- a potentiometer 12 for adjusting the set value is also associated with the gas control 14.
- the temperature detected is also applied to an integrator 13 which calculates the value ⁇ at switch-off, the ⁇ being the difference between the temperature of the starting water noted by the sensor 9 and that of the return water as it enters the boiler through the return circuit 7.
- the water temperature upstream and downstream of the exchanger is identical.
- a set temperature tc displayed by the potentiometer 12 is a desired temperature t1 and in the case where the demand for calories is less than the small power, when the boiler starts up, the temperature t1, increased by a differential value, for example of 2 °, will be reached more or less quickly depending on the installation and the water flow, therefore the circulation delay time, and the boiler will stop.
- the pump 8 during the determined duration of the post-purge after the burner has stopped, continuing to circulate the water in the circuit between the flow and the return to the exchanger, the temperature will, during this period of time, go from a temperature t1 + 2 ° to a temperature t2.
- the sensor 9 At the end of this post-scanning period, the sensor 9 will provide a temperature value t2 ⁇ t1, the ⁇ between these temperatures then being given by the difference (t1 + 2 °) - t2 this to the evolution of the temperature back close.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Feeding And Controlling Fuel (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Description
L'invention concerne un dispositif de régulation de chaudière à gaz mettant en oeuvre une pompe de circulation qui alimente un circuit de radiateurs à partir d'un échangeur de chaleur, dispositif grâce auquel est assuré un fonctionnement stable de l'appareil, même pour des besoins inférieurs à la puissance minimum.The invention relates to a gas boiler regulating device using a circulation pump which supplies a circuit of radiators from a heat exchanger, a device by which a stable operation of the appliance is ensured, even for requirements lower than the minimum power.
Dans les appareils à gaz modernes, fournissant de l'eau chaude à un circuit de radiateurs, on sait que des dispositifs de régulation permettent le réglage de la température de l'eau en fonction de la dimension de l'installation et de la puissance demandée. Pour que cette régulation fonctionne il faut qu'elle reçoive de façon permanente des informations sur la température de l'eau qui traverse l'échangeur de chaleur et qu'ainsi elle puisse, en fonction du débit, interpréter ces indications dans le sens d'une commande d'ouverture ou de fermeture progressive de l'alimentation en gaz du brûleur. Un ou des capteurs de température sont alors disposés à l'entrée ou à la sortie de l'échangeur, pour détecter respectivement la température de l'eau faisant retour des radiateurs ou celle de l'eau chaude fournie par l'échangeur, comme décrit dans le DE-C2 3538 934. Il existe un certain nombre de modes de régulation destinés à interpréter les informations reçues du ou des capteurs . On connaît par exemple un mode de régulation basé sur la température de retour utilisant un capteur placé à l'entrée de l'échangeur. Dans le cas de fonctionnement dit en tout ou rien, si la température décelée est inférieure à la température de consigne pré-affichée à la régulation, la chaudière se mettra en route à plein régime et fournira brutalement au circuit un train de chaleur, dont on connaît les inconvénients inhérents aux risques de surchauffe du circuit. Avec cette régulation basée sur la température de retour, on peut aussi fonctionner avec un régime de puissance intermédiaire, à l'aide d'une électrovalve à deux débits, ce qui n'est pas idéal pour les installations à circuit long; on peut fonctionner encore avec une électrovalve modulable qui présente l'intérêt de pouvoir moduler la puissance entre une valeur minimum et la pleine puissance, mais qui reste difficile cependant du fait que le capteur est sur le retour et que l'on ressent l'inertie de l'installation.In modern gas appliances, supplying hot water to a circuit of radiators, it is known that regulating devices allow the regulation of the water temperature according to the size of the installation and the power demanded. . For this regulation to work, it must permanently receive information on the temperature of the water passing through the heat exchanger and thus be able, depending on the flow rate, to interpret these indications in the sense of a command to open or gradually close the gas supply to the burner. One or more temperature sensors are then placed at the inlet or at the outlet of the exchanger, for detecting respectively the temperature of the water returning from the radiators or that of the hot water supplied by the exchanger, as described in DE-C2 3538 934. There are a number of control modes intended to interpret the information received from the sensor (s). For example, there is a known mode of regulation based on the return temperature using a sensor placed at the inlet of the exchanger. In the case of all-or-nothing operation, if the detected temperature is lower than the set temperature pre-displayed for regulation, the boiler will start up at full speed and will suddenly supply the circuit with a heat train, which knows the disadvantages inherent in the risks of circuit overheating. With this regulation based on the return temperature, it is also possible to operate with an intermediate power regime, using a two-flow solenoid valve, which is not ideal for long circuit installations; we can still operate with a modular solenoid valve which has the advantage of being able to modulate the power between a minimum value and full power, but which remains difficult however due to the fact that the sensor is on the return and that we feel the inertia of the installation.
On peut envisager alors un autre mode de régulation basé sur la température de départ également modulante entre une valeur minimum et la pleine puissance. Cette régulation donne satisfaction mais présente cependant l'inconvénient d'une régulation tout ou rien quand la puissance demandée est au-dessous du seuil de puissance minimum de la chaudière, car il n'existe pas d'autorité d'allumage fixe qu'un système de régulation simple puisse gérer.We can then consider another mode of regulation based on the flow temperature also modulating between a minimum value and full power. This regulation is satisfactory but has the disadvantage of an all or nothing regulation when the requested power is below the minimum power threshold of the boiler, since there is no fixed ignition authority that a simple regulation system can handle.
L'invention a pour objet une nouvelle régulation qui élimine ces inconvénients, qui combine les avantages de chacune des régulations sur le départ et sur le retour tout en évitant de placer un capteur de température, à la fois sur le départ et sur le retour du circuit c'est-à-dire en aval et en amont de l'échangeur de chaleur.The subject of the invention is a new regulation which eliminates these drawbacks, which combines the advantages of each of the regulations on the departure and on the return while avoiding placing a temperature sensor, both on the departure and on the return of the circuit that is to say downstream and upstream of the heat exchanger.
L'invention concerne donc un dispositif de régulation d'une chaudière à gaz comportant un échangeur de chaleur chauffé par un brûleur à gaz alimenté par une électrovanne, ladite électrovanne étant elle-même actionnée par un dispositif de régulation à micro-processeur, et comportant un circuit de départ d'eau chaude partant dudit échangeur pour alimenter des radiateurs sous l'action d'une pompe de circulation et faisant retour audit échangeur, un capteur de température étant prévu sur le conduit de départ à la sortie de l'échangeur, dispositif selon lequel ledit capteur este un capteur unique agencé en liaison avec un intégrateur et un dispositif de régulation pour fournir des indications sur la température réelle de l'eau chaude sur le circuit de départ avant l'arrêt du brûleur et pour déduire la température qu'aurait l'eau de retour sur le circuit de retour en amont de l'échangeur à partir d'une indication de la température de l'eau sur le circuit de départ, prélevée après l'arrêt du brûleur et après une durée déterminée de circulation d'eau non chauffée dans les circuits, et selon lequel la température détectée par le capteur est appliquée à l'intégrateur qui calcule la différence de température entre l'eau du circuit de départ et celle du circuit de retour.The invention therefore relates to a device for regulating a gas boiler comprising a heat exchanger heated by a gas burner supplied by a solenoid valve, said solenoid valve being itself actuated by a microprocessor regulating device, and comprising a hot water starting circuit leaving said exchanger to supply radiators under the action of a circulation pump and returning to said exchanger, a temperature sensor being provided on the starting pipe at the outlet of the exchanger, device according to which said sensor is a single sensor arranged in connection with an integrator and a regulating device for providing indications on the actual temperature of the hot water on the flow circuit before the burner stops and for deducing the temperature that 'would have the return water on the return circuit upstream of the exchanger from an indication of the water temperature on the circuit flow, taken after the burner has stopped and after a determined period of circulation of unheated water in the circuits, and according to which the temperature detected by the sensor is applied to the integrator which calculates the temperature difference between the water from the outgoing circuit and that from the return circuit.
Les caractéristiques particulières ainsi que les avantages de l'invention seront aussi précisés dans la description qui va suivre d'un exemple non limitatif de réalisation faisant référence à une figure unique qui représente schématiquement une chaudière à gaz et son dispositif de régulation associé.The particular characteristics as well as the advantages of the invention will also be specified in the description which follows of a nonlimiting example of embodiment referring to a single figure which schematically represents a gas boiler and its associated regulation device.
On a représenté sur la figure certains éléments d'une chaudière à gaz 1 tel qu'un corps de chauffe 2 constituant l'échangeur de chaleur, chauffé par un brûleur 3, lui-même alimenté en gaz par l'intermédiaire d'une électrovanne 4. Un circuit 5 de départ d'eau chaude fournie par l'échangeur alimente une pluralité de radiateurs 6, l'eau faisant retour à l'échangeur par un circuit de retour 7 dans lequel se trouve une pompe de circulation 8. Dans le cas d'un fonctionnement intermittent de la pompe, ce qui veut dire qu'elle ne tourne et ne provoque de circulation d'eau dans les circuits que quand le brûleur est allumé, il est cependant prévu, pendant une durée limitée après l'arrêt du brûleur, que la pompe continue de fonctionner pour éviter toute surchauffe, ce fonctionnement prolongeant quelque temps la circulation d'eau dans le circuit. Un capteur de température 9 est disposé sur le circuit 5 juste en aval de l'échangeur 2. L'électrovanne 4 est actionnée par un dispositif de régulation 10 à microprocesseur auquel est appliquée la température détectée par le capteur 9 et qui assure la commande d'admission gaz 14 à l'électrovanne 4 par l'intermédiaire d'un générateur de courant 11. Un potentiomètre 12 de réglage de la valeur de consigne est en outre associé à la commande gaz 14. On applique également la température détectée à un intégrateur 13 qui calcule la valeur Δτ à l'extinction, le Δτ étant la différence entre la température de l'eau de départ notée par le capteur 9 et celle de l'eau de retour telle qu'elle pénètre dans la chaudière par le circuit de retour 7.There is shown in the figure certain elements of a
Quand la chaudière ne fonctionne pas et qu'il n'y a pas de circulation d'eau dans les circuits, la température de l'eau en amont et en aval de l'échangeur est identique. Dans le cas où une température de consigne tc affichée par le potentiomètre 12 est une température t₁ recherchée et dans le cas où la demande en calories est inférieure à la petite puissance, quand la chaudière se met en route, la température t₁, augmentée d'une valeur différentielle par exemple de 2°, sera atteinte plus ou moins rapidement en fonction de l'installation et du débit d'eau,donc du temps de retard de circulation, et la chaudière s'arrêtera. La pompe 8, pendant la durée déterminée du post-balayage après l'arrêt du brûleur, continuant à faire circuler l'eau dans le circuit entre le départ et le retour à l'échangeur, la température va, durant ce laps de temps, passer d'une température t₁ + 2° à une température t₂. A la fin de cette période de post-balayage, le capteur 9 fournira une valeur de température t₂ < t₁, le Δτ entre ces températures étant alors donné par la différence (t₁ + 2°) - t₂ ceci à l'évolution de la température de retour près.When the boiler is not operating and there is no water circulation in the circuits, the water temperature upstream and downstream of the exchanger is identical. In the case where a set temperature tc displayed by the
Ce Δτ va permettre de corriger la consigne de température d'eau sur le départ, la température du retour étant ainsi vue par le capteur départ lorsque la chaudière est éteinte. La consigne sur le retour est donc de t₂ moins la valeur de différentielle, et la chaudière est arrêtée. Dès que cette température est atteinte il y a réallumage de l'appareil jusqu'à ce que soit atteinte la température t₁ (à la valeur de différentielle près). On peut ainsi réguler sur le retour si la demande est inférieure à la petite puissance, la régulation s'effectuant de façon classique sur le départ si la demande est supérieure à la petite puissance.This Δτ will make it possible to correct the water temperature setpoint on the flow, the return temperature being thus seen by the flow sensor when the boiler is off. The return setpoint is therefore t₂ minus the differential value, and the boiler is stopped. As soon as this temperature is reached, the device is re-ignited until the temperature t₁ is reached (to the nearest differential value). It is thus possible to regulate on the return if the demand is less than the small power, the regulation being effected in a conventional manner on the departure if the demand is greater than the small power.
Claims (2)
- Device for regulating a gas boiler including a heat exchanger heated by a gas burner supplied via an electrovalve, the said electrovalve being itself actuated by a regulator device with a microprocessor, and including an outflow circuit of the hot water leaving the said exchanger for feeding radiators by the action of a circulating pump and causing the return to the said exchanger, provision being made for a temperature sensor in the outflow circuit at the outlet of the exchanger, characterized in that the said sensor (9) is a single sensor arranged in conjunction with an integrator (13) and a regulator device (10) for supplying indications regarding the real temperature t₁ of the hot water in the outflow circuit (5) before the burner is stopped and for deducing the temperature t₂ which the return water would have in the return circuit (7) ahead of the exchanger on the basis of an indication of the temperature of the water in the outflow circuit (5) taken after the burner has been stopped, and after a specified circulation period of unheated water in the circuits and in that the temperature detected by the sensor (9) is passed to the integrator (13) which calculates the temperature difference Δτ between the water of the outflow circuit and that of the return circuit (7).
- Device according to claim 1, characterized in that the measurement of the Δτ allows the set point of the water temperature to be corrected in the outflow circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88402460T ATE76956T1 (en) | 1987-10-05 | 1988-09-29 | GAS BOILER REGULATOR. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8713717 | 1987-10-05 | ||
| FR8713717A FR2621382B1 (en) | 1987-10-05 | 1987-10-05 | GAS BOILER CONTROL DEVICE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0311488A1 EP0311488A1 (en) | 1989-04-12 |
| EP0311488B1 EP0311488B1 (en) | 1992-06-03 |
| EP0311488B2 true EP0311488B2 (en) | 1996-04-10 |
Family
ID=9355511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88402460A Expired - Lifetime EP0311488B2 (en) | 1987-10-05 | 1988-09-29 | Gas boiler regulation device |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0311488B2 (en) |
| AT (1) | ATE76956T1 (en) |
| DE (1) | DE3871701T2 (en) |
| ES (1) | ES2031619T5 (en) |
| FR (1) | FR2621382B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19731756A1 (en) * | 1997-07-23 | 1999-02-04 | Volker Boehringer | Control system for heating system |
| CN109341089B (en) * | 2018-11-26 | 2023-09-08 | 珠海格力电器股份有限公司 | Gas distribution rod, gas water heater and gas control method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58158445A (en) * | 1982-03-16 | 1983-09-20 | Matsushita Electric Ind Co Ltd | Controller for hot water supply device |
| JPS58160759A (en) * | 1982-03-17 | 1983-09-24 | Matsushita Electric Ind Co Ltd | Apparatus for controlling hot water supplying apparatus |
| JPS58160762A (en) * | 1982-03-18 | 1983-09-24 | Matsushita Electric Ind Co Ltd | Apparatus for controlling hot water supply apparatus |
-
1987
- 1987-10-05 FR FR8713717A patent/FR2621382B1/en not_active Expired - Fee Related
-
1988
- 1988-09-29 DE DE3871701T patent/DE3871701T2/en not_active Expired - Fee Related
- 1988-09-29 ES ES88402460T patent/ES2031619T5/en not_active Expired - Lifetime
- 1988-09-29 EP EP88402460A patent/EP0311488B2/en not_active Expired - Lifetime
- 1988-09-29 AT AT88402460T patent/ATE76956T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ES2031619T3 (en) | 1992-12-16 |
| DE3871701D1 (en) | 1992-07-09 |
| DE3871701T2 (en) | 1996-12-12 |
| EP0311488B1 (en) | 1992-06-03 |
| FR2621382A1 (en) | 1989-04-07 |
| ES2031619T5 (en) | 1996-07-16 |
| ATE76956T1 (en) | 1992-06-15 |
| EP0311488A1 (en) | 1989-04-12 |
| FR2621382B1 (en) | 1990-01-19 |
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