EP1019655B1 - Procede de retablissement du niveau de l'eau dans des chaudieres de machines de production de vapeur - Google Patents
Procede de retablissement du niveau de l'eau dans des chaudieres de machines de production de vapeur Download PDFInfo
- Publication number
- EP1019655B1 EP1019655B1 EP98948940A EP98948940A EP1019655B1 EP 1019655 B1 EP1019655 B1 EP 1019655B1 EP 98948940 A EP98948940 A EP 98948940A EP 98948940 A EP98948940 A EP 98948940A EP 1019655 B1 EP1019655 B1 EP 1019655B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- boiler
- water
- level
- starting
- 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
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
- F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
- F22B1/285—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs the water being fed by a pump to the reservoirs
Definitions
- the present invention relates to a process for restoring the level of water in boilers of steam generating machines.
- the invention applies to the steam generating machines to be associated with various appliances such as flatirons, cleaning devices, air humidifiers, etc., and is directed to obtain a controlled and precise filling of the boiler in order to ensure that the functioning of the steam generator is always in condition of best efficiency.
- Steam generators are known incorporating a boiler constituted by an hermetically closed container tank, provided with heating resistors having the function of transforming the water into steam.
- the known boilers normally have a level sensor which provides to disconnect the resistors as soon as the level of the water reaches a predetermined minimum level, as well as to signal to the user such condition so that he can provide for the manual filling of the boiler.
- Document DE 37 20 583 A1 discloses a process for restoring the level of water in a boiler of a steam generating machine of the type comprising a boiler, an auxiliary water supply, a pump connecting the auxiliary water supply to the boiler, means for detecting a predetermined minimum level of water inside the boiler and a control device for controlling the operation of the pump. According to the cited prior art document, whenever the minimum level of water inside the boiler is detected, the pump is operated for a predetermined constant operating time.
- Document US 4 948 947 A discloses a process for restoring the level of water in a boiler of a steam generating machine of the type comprising a boiler, an auxiliary water supply, a pump connecting the auxiliary water supply to the boiler, means for detecting a predetermined minimum level of water inside the boiler, means for detecting a predetermined maximum level of water inside the boiler and a control device for controlling the operation of the pump. Whenever the water level inside the boiler reaches the minimum level the pump is started and it is stopped when the water reaches the maximum level.
- a process for restoring the level of water in a boiler of a steam generating machine of the type comprising a boiler, an auxiliary water tank, a pump connecting the auxiliary water tank to the boiler, means for detecting a predetermined minimum level of water inside the boiler and a control device for controlling the operation of the pump, the said process comprising the following steps:
- reference numeral 10 indicates generically a detail of a steam generating machine using the process for restoring the level of water in the boiler 11, according to the process according to the invention.
- Said machine 10 includes a water containing auxiliary tank 12 connected to a pump 13 connected to the boiler 11 through an inlet 14.
- the water of the tank 12 is introduced, at command, through the pump 13 to fill the boiler 11, where it is progressively heated and then led to evaporation by the electric heating resistor 15 to generate steam which is supplied to the appliance (not shown) through the delivery outlet 16.
- the pump 13 is automatically operated, by a starting and control device 17, any time the water in the boiler 11 reaches a predetermined minimum level L0 which is calculated in such a manner to maintain the electric resistor 15 always submerged.
- the reaching of said minimum level L0 is detected by the same inlet conduit 14 which acts as conduction probe as the water level reaches its lower edge 18.
- the operation of the pump 13 is operatively controlled by the pressure measuring device 19 which, by utilising the continuously detected value of the pressure inside the boiler 11, controls the pump 13, through said starting and control device, to cause the said pump to modify its operating time according to the value of said pressure.
- the flow rate of the pump 13 is variable depending upon the variation of the pressure in the boiler 11 and changes continuously, during the refilling operations, according to the variation of the quantity of water contained in the boiler 11.
- the detection of the flow rate of the pump 13 according to the pressure in the boiler 11 allows to ensure under any circumstance and at any time the control of the filling conditions, by modifying the time of operation of the pump 13 to ensure the exact reaching of the maximum level L1.
- Such detection of the flow rate which is based on the characteristic pressure/flow rate curve of the specific pump 13 used, according to a first solution occurs in a substantially continuous way.
- said detection occurs with a desired frequency, for instance every second, also depending upon the mechanical features of the pump 13.
- an instantaneous flow rate reader 21 On the feeding duct connecting the pump 13 to the boiler 11 there is arranged an instantaneous flow rate reader 21.
- Said reader 21 continuously detects the real instantaneous flow rate of the pump 13, as it changes according to the pressure within the boiler 11, and controls in feedback the starting and control device 17 in such a manner that it modifies the operating time of the pump 13 in order to obtain the desired and precise filling under any operating condition.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Non-Electrical Variables (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Jet Pumps And Other Pumps (AREA)
Claims (5)
- Procédé de rétablissement du niveau d'eau dans une chaudière (11) d'un dispositif de production de vapeur (10) du type comprenant une chaudière (11), un réservoir d'eau auxiliaire (12), une pompe (13) raccordant le réservoir d'eau auxiliaire (12) à la chaudière (11), un moyen (14) destiné à détecter un niveau minimum prédéterminé (LO) d'eau à l'intérieur de la chaudière (11) et un dispositif de commande (17) destiné à commander le fonctionnement de la pompe (13),
le procédé comprenant:le démarrage de la pompe (13) lors de la détection du fait que l'eau atteint le niveau minimum prédéterminé (LO),la détection de la pression réelle à l'intérieur de la chaudière (11) ou du débit d'eau délivré par la pompe (13) à la chaudière (11),la détermination, sur la base du débit, ou de la pression, détecté, d'une durée d'activation de pompe requise pour que l'eau atteigne un niveau de remplissage maximum désiré (L1) dans la chaudière (11), etl'activation de la pompe (13) pendant la durée d'activation déterminée. - Procédé selon la revendication 1, caractérisé par le fait que la pression instantanée à l'intérieur de la chaudière (11) est détectée en continu par un dispositif de mesure de pression (19) raccordé en boucle au dispositif de démarrage et de commande (17) de la pompe (13).
- Procédé selon la revendication 2, caractérisé en ce que les corrections les durées d'activation de la pompe (13) sont réalisées d'une manière continue.
- Procédé selon la revendication 2, caractérisé en ce que les corrections sur les durées d'activation de la pompe (13) sont réalisées de manière périodique à une fréquence désirée quelconque.
- Procédé selon la revendication 1, caractérisé en ce que l'activation de la pompe (13) est couplée de manière opérationnelle à un lecteur de débit (21) positionné à la sortie de distribution de ladite pompe et couplée en boucle au dispositif de démarrage et de commande (17).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT97UD000173A IT1295505B1 (it) | 1997-09-30 | 1997-09-30 | Procedimento di reintegro per caldaie in macchine per la generazione di vapore |
ITUD970173U | 1997-09-30 | ||
PCT/EP1998/005728 WO1999017056A1 (fr) | 1997-09-30 | 1998-09-08 | Procede de retablissement du niveau de l'eau dans des chaudieres de machines de production de vapeur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1019655A1 EP1019655A1 (fr) | 2000-07-19 |
EP1019655B1 true EP1019655B1 (fr) | 2002-10-23 |
Family
ID=11422470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98948940A Expired - Lifetime EP1019655B1 (fr) | 1997-09-30 | 1998-09-08 | Procede de retablissement du niveau de l'eau dans des chaudieres de machines de production de vapeur |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1019655B1 (fr) |
AT (1) | ATE226704T1 (fr) |
AU (1) | AU9538498A (fr) |
DE (1) | DE69808955T2 (fr) |
ES (1) | ES2184325T3 (fr) |
HR (1) | HRP20000246B1 (fr) |
IT (1) | IT1295505B1 (fr) |
WO (1) | WO1999017056A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4356793A1 (fr) * | 2022-10-03 | 2024-04-24 | Whirlpool Corporation | Estimation de niveau de liquide dans un système de génération de vapeur |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE0202988D0 (sv) † | 2002-03-15 | 2002-10-10 | Delaval Holding Ab | A method and an arrangement at a dairy farm |
DE102009055144A1 (de) * | 2009-12-22 | 2011-06-30 | BSH Bosch und Siemens Hausgeräte GmbH, 81739 | Dampferzeugungseinheit für ein Haushaltsgerät und Verfahren zum Erzeugen von Wasserdampf |
GB201017461D0 (en) * | 2010-10-15 | 2010-12-01 | Strix Ltd | Electric steam generation |
DE102011006766B4 (de) * | 2011-04-05 | 2014-12-04 | BSH Bosch und Siemens Hausgeräte GmbH | Dampferzeuger und Verfahren zum Steuern der Wasserzufuhr des Dampferzeugers |
DE102012100070A1 (de) * | 2012-01-05 | 2013-07-11 | Alfred Kärcher Gmbh & Co. Kg | Dampfreinigungsgerät |
RU2014128960A (ru) | 2012-12-05 | 2017-01-13 | Ким Но Ыль | Электродный котел с блоком электродов |
CN114278917B (zh) * | 2022-03-04 | 2022-11-11 | 福建新瓦特科技有限公司 | 一种蒸汽产生系统的进水控制方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3720583A1 (de) * | 1987-06-22 | 1989-01-05 | Riba Guenther | Dampferzeuger mit abschlaemmvorrichtung |
US4948947A (en) * | 1988-07-26 | 1990-08-14 | Pacific Steam Equipment, Inc. | Steam boiler |
US5189726A (en) * | 1990-09-28 | 1993-02-23 | Cts Costruzioni Techniche Sanmarinesi | Steam producing apparatus for home use with low cold water reservoir level steam output stoppage |
IT1278873B1 (it) * | 1995-12-07 | 1997-11-28 | Giuliano Franchini | Caldaia a rapida produzione di vapore |
-
1997
- 1997-09-30 IT IT97UD000173A patent/IT1295505B1/it active IP Right Grant
-
1998
- 1998-09-08 WO PCT/EP1998/005728 patent/WO1999017056A1/fr active IP Right Grant
- 1998-09-08 ES ES98948940T patent/ES2184325T3/es not_active Expired - Lifetime
- 1998-09-08 EP EP98948940A patent/EP1019655B1/fr not_active Expired - Lifetime
- 1998-09-08 AU AU95384/98A patent/AU9538498A/en not_active Abandoned
- 1998-09-08 DE DE69808955T patent/DE69808955T2/de not_active Expired - Lifetime
- 1998-09-08 AT AT98948940T patent/ATE226704T1/de not_active IP Right Cessation
-
2000
- 2000-04-27 HR HR20000246A patent/HRP20000246B1/xx not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4356793A1 (fr) * | 2022-10-03 | 2024-04-24 | Whirlpool Corporation | Estimation de niveau de liquide dans un système de génération de vapeur |
Also Published As
Publication number | Publication date |
---|---|
AU9538498A (en) | 1999-04-23 |
ES2184325T3 (es) | 2003-04-01 |
DE69808955T2 (de) | 2003-11-06 |
ATE226704T1 (de) | 2002-11-15 |
HRP20000246A2 (en) | 2001-02-28 |
DE69808955D1 (de) | 2002-11-28 |
IT1295505B1 (it) | 1999-05-12 |
WO1999017056A1 (fr) | 1999-04-08 |
EP1019655A1 (fr) | 2000-07-19 |
HRP20000246B1 (en) | 2009-03-31 |
ITUD970173A1 (it) | 1999-03-30 |
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