EP0442777A1 - Flow regulator with differential pressure controlled membrane for a hot-water gas heater - Google Patents

Flow regulator with differential pressure controlled membrane for a hot-water gas heater Download PDF

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Publication number
EP0442777A1
EP0442777A1 EP91400262A EP91400262A EP0442777A1 EP 0442777 A1 EP0442777 A1 EP 0442777A1 EP 91400262 A EP91400262 A EP 91400262A EP 91400262 A EP91400262 A EP 91400262A EP 0442777 A1 EP0442777 A1 EP 0442777A1
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EP
European Patent Office
Prior art keywords
piston
membrane
rocker
water
sleeve
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.)
Granted
Application number
EP91400262A
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German (de)
French (fr)
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EP0442777B1 (en
Inventor
André De Lannoy
Jean-Luc Veislinger
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0442777A1 publication Critical patent/EP0442777A1/en
Application granted granted Critical
Publication of EP0442777B1 publication Critical patent/EP0442777B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F23N1/087—Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/20—Membrane valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/24—Valve details

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

A profiled sleeve 33 which can close to a greater or lesser extent an orifice for passage of water 35 is displaced by rotation of a coaxial piston 24 which is manoeuvred by a button 28 arranged in front of the heater, the head of the piston coming to bear against a rocker 18 which follows the movements of the membrane 3 and which locks the stop when the heater is at rest. Application in gas-operated water heater and bath heaters. <IMAGE>

Description

L'invention se situe dans le domaine technique des appareils à gaz de production d'eau chaude et concerne plus particulièrement un limitateur réglable du débit d'eau destiné à un mécanisme de commande à membrane différentielle.The invention relates to the technical field of gas appliances for producing hot water and relates more particularly to an adjustable limiter of the water flow intended for a control mechanism with a differential membrane.

Le dispositif régulateur ou limitateur de débit d'eau habituellement monté sur ce type d'appareil comporte une membrane se déplaçant sous l'effet d'une différence de pression créée par le passage de l'eau dans un dispositif du genre venturi, ainsi qu'un organe obturateur dont l'élément mobile est solidaire des déplacements de ladite membrane. Pour obtenir un débit constant malgré de larges variations possibles de la pression amont, on connaît des dispositifs obturateurs hydrauliquement équilibrés en forme de piston mobile dont la tête forme clapet d'obturation et dont la jupe de forme extérieure cylindrique coulisse avec jeu à l'intérieur d'une fourrure cylindrique fixe ; la tête de ce piston est percée d'un orifice qui permet de réaliser l'équilibre des pressions entre le dessus et le dessous. La liaison mécanique entre le piston et la membrane est assurée par une entretoise ou une barre de liaison. Dans les appareils à puissance variable, c'est-à-dire qui permettent de pouvoir effectuer des puisages d'eau chaude aussi bien à tout petit débit qu'à gros débit sans qu'il en résulte une variation notable de la température, une manette été/hiver corrige la variation dûe à la température de l'eau à l'entrée de l'appareil. Mais cette action corrige uniquement la zone de régulation proportionnelle et n'empêche pas l'utilisateur d'ouvrir en grand le robinet de puisage, ce qui donne alors une eau insuffisamment chaude.The device regulating or limiting water flow usually mounted on this type of device has a membrane moving under the effect of a pressure difference created by the passage of water in a device of the venturi type, as well as 'A shutter member whose movable member is integral with the movements of said membrane. In order to obtain a constant flow rate despite large possible variations in the upstream pressure, hydraulically balanced shutter devices are known in the form of a movable piston whose head forms a shutter valve and whose cylindrical outer skirt slides with play inside a fixed cylindrical fur; the head of this piston is pierced with an orifice which makes it possible to achieve the pressure balance between the top and the bottom. The mechanical connection between the piston and the membrane is ensured by a spacer or a connecting bar. In appliances with variable power, that is to say which make it possible to draw hot water both at very low flow rate and at high flow rate without resulting in a significant variation in temperature, a summer / winter controller corrects the variation due to the water temperature at the inlet of the appliance. But this action only corrects the proportional regulation zone and does not prevent the user from opening the draw-off valve large, which then gives insufficiently hot water.

Pour pallier à cet inconvénient, une solution telle que décrite dans le FR-A 2 569 283 consiste à faire en sorte que le piston mobile et l'entretoise de liaison avec la membrane soient réglable en hauteur l'un par rapport à l'autre en faisant en sorte que le piston coopère avec l'entretoise à l'aide d'une liaison filetée et soit manoeuvré en rotation, de l'extérieur, par une manette qui se trouve donc sous le mécanisme de commande, au droit du piston et de la membrane.To overcome this drawback, a solution as described in FR-A 2 569 283 consists in ensuring that the movable piston and the spacer connecting with the membrane are adjustable in height relative to each other by ensuring that the piston cooperates with the spacer by means of a threaded connection and is maneuvered in rotation, from the outside, by a lever which is therefore located under the control mechanism, in line with the piston and the diaphragm.

La position de cette manette sous l'appareil rend malaisée son utilisation, et la création d'un filetage dans le piston et sur l'entretoise imposent la création de pièces nouvelles devant être usinées avec précision et donc coûteuses.The position of this handle under the device makes it difficult to use, and the creation of a thread in the piston and on the spacer require the creation of new parts to be machined with precision and therefore expensive.

La Demanderesse, dans le but de ramener ce réglage du débit d'eau à l'avant de l'appareil, dans une zone visible et facilement accessible à l'usager, a donc imaginé un nouveau limiteur réglable qui s'intègre aisément à l'appareil sans nécessiter de modifier le piston et l'entretoise habituellement utilisés dans les mécanismes connus, et qui permet de s'affranchir des variations de pression du réseau.The Applicant, in order to bring this adjustment of the water flow rate to the front of the device, in a visible area that is easily accessible to the user, has therefore devised a new adjustable limiter which is easily integrated into the 'device without the need to modify the piston and the spacer usually used in known mechanisms, and which overcomes variations in network pressure.

Aussi, un objet de la présente invention consiste en un limiteur de débit d'eau destiné à un mécanisme de commande à membrane différentielle pour appareil à gaz de production d'eau chaude comportant un organe obturateur pouvant obturer plus ou moins l'orifice de passage d'eau entre le conduit d'arrivée et la chambre de pression située sous la membrane, lequel limiteur étant constitué d'un manchon profilé pouvant obturer plus ou moins un orifice de passage d'eau d'un conduit d'arrivée vers un conduit de sortie, manchon qui est déplacé par la rotation d'un piston coaxial manoeuvré par un bouton disposé en avant de l'appareil, et selon lequel la tête dudit piston vient en appui contre un basculeur qui suit les mouvements de la membrane.Also, an object of the present invention consists of a water flow limiter intended for a differential membrane control mechanism for a gas appliance for producing hot water comprising a shutter member capable of more or less closing the passage orifice. of water between the inlet pipe and the pressure chamber located under the membrane, which limiter consists of a profiled sleeve which can more or less block a water passage orifice from an inlet pipe to a pipe outlet, sleeve which is moved by the rotation of a coaxial piston operated by a button arranged in front of the device, and according to which the head of said piston comes to bear against a rocker which follows the movements of the membrane.

Selon une caractéristique particulière de l'invention, le basculeur dispose de deux branches pivotant autour d'un axe horizontal, une première branche étant engagée sous la membrane, une seconde branche étant en appui contre le piston mobile. Avantageusement, une lamelle de glissement pivotant autour d'un axe horizontal est intercalée entre la branche du basculeur et la tête du piston.According to a particular characteristic of the invention, the rocker has two branches pivoting about a horizontal axis, a first branch being engaged under the membrane, a second branch being in abutment against the movable piston. Advantageously, a sliding strip pivoting about a horizontal axis is interposed between the branch of the rocker and the head of the piston.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre d'une forme de réalisation faisant référence à une figure unique montrant en coupe un mécanisme de commande à membrane différentielle équipé du limiteur de débit.Other characteristics and advantages of the invention will appear on reading the following description of an embodiment referring to a single figure showing in section a differential membrane control mechanism equipped with the flow limiter.

Le boîtier du mécanisme est constitué d'une coquille supérieure 1 et d'une coquille inférieure 2 entre lesquelles est tendue une membrane 3, soumise à une pression différentielle délimitant deux chambres d'eau 4 et 5. Un conduit de sortie d'eau 6 communique avec la chambre 5 par un orifice 7. Cette chambre 5 est elle-même ouverte sur une chambre d'entrée d'eau 8 par un orifice de communication 9 à la base de la coquille 2. La membrane 3 munie d'une partie centrale rigide 23 est liée par une tige 10 au clapet 11 d'admission du gaz aux brûleurs non représentés. Le clapet 11 est maintenu fermé contre son siège par le ressort 12 et obture le conduit d'arrivée de gaz 13.The mechanism housing consists of an upper shell 1 and a lower shell 2 between which is stretched a membrane 3, subjected to a differential pressure defining two water chambers 4 and 5. A water outlet conduit 6 communicates with chamber 5 through an orifice 7. This chamber 5 is itself open onto a water inlet chamber 8 through a communication orifice 9 at the base of the shell 2. The membrane 3 provided with a part rigid central unit 23 is connected by a rod 10 to the valve 11 for admitting the gas to the burners, not shown. The valve 11 is kept closed against its seat by the spring 12 and closes the gas inlet pipe 13.

Un piston 14 servant à modifier la perte de charge est mobile dans un puits vertical à l'aplomb de l'orifice 7, et obture plus ou moins cet orifice ; il est rappelé par un ressort 15 contre une entretoise de liaison 16 grâce à laquelle le mouvement du piston est solidarisé avec celui de la membrane 3. Une cartouche de positionnement 17, localisée dans la chambre 5 au niveau de l'orifice 9 sert de support à un basculeur 18 à deux branches 19 et 20 pivotant autour d'un axe horizontal 21, ainsi qu'à une lamelle de glissement 22 pivotant aussi autour d'un axe horizontal 29 voisin de l'axe 21, intercalée entre le basculeur et la butée. Dans la position représentée, une première branche 19 du basculeur 18 est engagée entre la partie centrale rigide de la membrane 3 et le piston 14, au niveau de l'entretoise 16, et se trouve en appui contre cette partie 23. L'autre branche 20 est appliquée contre la partie inférieure d'une face de la lamelle 22 dont la face opposée est elle-même en butée contre la tête d'un piston 24 constituant l'organe obturateur du limiteur de débit d'eau qui s'étend dans un puits 25 se développant vers l'avant de l'appareil et déborde dans la chambre 8.A piston 14 used to modify the pressure drop is movable in a vertical well perpendicular to the orifice 7, and more or less closes this orifice; it is recalled by a spring 15 against a connecting spacer 16 by which the movement of the piston is secured to that of the membrane 3. A positioning cartridge 17, located in the chamber 5 at the orifice 9 serves as a support to a rocker 18 with two branches 19 and 20 pivoting around a horizontal axis 21, as well as to a sliding strip 22 also pivoting around a horizontal axis 29 near the axis 21, interposed between the rocker and the stop. In the position shown, a first branch 19 of the rocker 18 is engaged between the rigid central part of the membrane 3 and the piston 14, at the level of the spacer 16, and is in abutment against this part 23. The other branch 20 is applied against the lower part of a face of the strip 22, the opposite face of which is itself in abutment against the head of a piston 24 constituting the shutter member of the water flow limiter which extends in a well 25 developing towards the front of the apparatus and overflows into bedroom 8.

Le puits 25 communique avec la chambre 8 par un orifice 35 plus ou moins obturable comme on le verra plus loin, et communique aussi avec un conduit d'entrée d'eau 36. L'extrémité opposée de ce puits est obturée de façon étanche par un bouchon 26, traversé également de façon étanche par la tige 27 d'un bouton rotatif extérieur 28. La tige 27 porte deux méplats latéraux 30 qui sont engagés dans une ouverture centrale à bords plats 31 prévue axialement dans le corps du piston 24. Ce dernier est muni extérieurement d'un filetage 32 qui coopère avec un manchon de guidage 33 taraudé intérieurement, coulissant à l'intérieur du puits 25, et rappelé par un ressort 34 contre le basculeur 18. La tête du manchon déborde dans l'orifice 35 séparant la chambre 8 du puits 25.The well 25 communicates with the chamber 8 through a more or less closable orifice 35 as will be seen below, and also communicates with a water inlet conduit 36. The opposite end of this well is sealed by a plug 26, also crossed in leaktight fashion by the rod 27 of an external rotary knob 28. The rod 27 carries two lateral flats 30 which are engaged in a central opening with flat edges 31 provided axially in the body of the piston 24. This the latter is provided externally with a thread 32 which cooperates with a guide sleeve 33 internally threaded, sliding inside the well 25, and biased by a spring 34 against the rocker 18. The head of the sleeve projects into the orifice 35 separating chamber 8 from well 25.

Dans la position représentée sur la figure, le ressort 34 tend à écarter le manchon de guidage 33 du bouchon 26, en direction de l'orifice 35 qu'il ferme partiellement. La tête du piston réglable 24, solidaire du manchon par son filetage 32, s'applique contre la lamelle de glissement 22 qui elle-même exerce une certaine pression contre la branche 20 du basculeur 18 qui aurait tendance à tourner autour de son axe 21, ce mouvement étant contrarié par la branche 19 en appui contre la partie rigide 23 de la membrane 3. L'extrémité du manchon de guidage est profilée de façon à limiter le passage d'eau par l'orifice 35, en fonction de sa position par rapport audit orifice. La figure montre l'appareil au repos. Dans ce cas le manchon se trouve engagé dans l'orifice 35 et limite au maximum le débit d'eau pouvant traverser l'appareil lors d'un puisage. Si l'on manoeuvre le bouton 28 dans le sens indiqué par la flèche les méplats 30 vont entraîner en rotation le piston 24. Puisque le tête de celle-ci est immobilisée par le basculeur, sa rotation va s'exercer, grâce au filetage 32, sur le manchon 33 en lui imprimant un mouvement de déplacement à l'encontre du ressort 34 dans le sens d'une ouverture de l'orifice 35. La section de passage d'eau devient plus importante, ainsi que le débit traversant l'appareil.In the position shown in the figure, the spring 34 tends to move the guide sleeve 33 away from the plug 26, in the direction of the orifice 35 which it partially closes. The head of the adjustable piston 24, secured to the sleeve by its thread 32, is applied against the sliding strip 22 which itself exerts a certain pressure against the branch 20 of the rocker 18 which would tend to rotate around its axis 21, this movement being counteracted by the branch 19 bearing against the rigid part 23 of the membrane 3. The end of the guide sleeve is profiled so as to limit the passage of water through the orifice 35, depending on its position by report to said orifice. The figure shows the device at rest. In this case the sleeve is engaged in the orifice 35 and limits to the maximum the flow of water that can pass through the device during a drawing. If the button 28 is operated in the direction indicated by the arrow, the flats 30 will rotate the piston 24. Since the head of the latter is immobilized by the rocker, its rotation will be exerted, thanks to the thread 32 , on the sleeve 33 by imparting to it a movement of movement against the spring 34 in the direction of an opening of the orifice 35. The water passage section becomes more important, as well as the flow through the device.

Quand un puisage s'effectue, le déplacement de la membrane 3 libère le basculeur 18, qui libère lui-même le piston 24. Ainsi l'ensemble manchon piston peut-il sous l'action du ressort 34 se déplacer à nouveau en direction de l'orifice 35, dans la position relative que ces deux pièces occupaient au départ, position déterminée par l'action préalable effectuée sur le bouton rotatif 28.When a drawing is made, the displacement of the membrane 3 releases the rocker 18, which itself releases the piston 24. Thus the piston sleeve assembly can under the action of the spring 34 move again in the direction of the orifice 35, in the relative position that these two parts occupied at the start, a position determined by the prior action carried out on the rotary button 28.

Claims (5)

1.- Limiteur de débit d'eau destiné à un mécanisme de commande à membrane différentielle pour appareil à gaz de production d'eau chaude comportant un organe obturateur pouvant obturer plus ou moins l'orifice de passage d'eau entre le conduit d'arrivée et la chambre de pression située sous la membrane, caractérisé par le fait que le limiteur est constitué d'un manchon profilé (33) pouvant obturer plus ou moins un orifice de passage d'eau (35) d'un conduit d'arrivée (36) vers un conduit de sortie (6), manchon qui est déplacé par la rotation d'un piston coaxial (24) manoeuvré par un bouton (28) disposé en avant de l'appareil, et par le fait que la tête dudit piston vient en appui contre un basculeur (28) qui suit les mouvements de la membrane (3). 1. - Water flow limiter intended for a differential membrane control mechanism for gas apparatus for producing hot water comprising a shutter member which can more or less seal the orifice for the passage of water between the conduit inlet and the pressure chamber located under the membrane, characterized in that the limiter consists of a profiled sleeve (33) which can more or less block a water passage orifice (35) of an inlet duct (36) to an outlet conduit (6), a sleeve which is moved by the rotation of a coaxial piston (24) operated by a button (28) disposed in front of the device, and by the fact that the head of said piston comes to bear against a rocker (28) which follows the movements of the membrane (3). 2.- Limiteur de débit selon la revendication 1, caractérisé en ce que le basculeur (18) dispose de deux branches pivotante autour d'un axe horizontal (21), une première branche (19) étant engagée entre la membrane (3) et le piston mobile (14), une seconde branche (20) étant en appui contre le piston (24). 2. - Flow restrictor according to claim 1, characterized in that the rocker (18) has two branches pivoting about a horizontal axis (21), a first branch (19) being engaged between the membrane (3) and the movable piston (14), a second branch (20) bearing against the piston (24). 3.- Limiteur de débit selon les revendications 1 et 2, caractérisé en ce qu'une lamelle de glissement (22) pivotant autour d'un axe horizontal (29) est intercalée entre la branche (20) du basculeur (18) et la tête du piston (24). 3. - Flow restrictor according to claims 1 and 2, characterized in that a sliding strip (22) pivoting about a horizontal axis (29) is interposed between the branch (20) of the rocker (18) and the piston head (24). 4.- Limiteur de débit selon la revendication 1, caractérisé en ce que le piston (24) est muni extérieurement d'un filetage 32 qui coopère avec le manchon de guidage (33), taraudé intérieurement. 4. - Flow restrictor according to claim 1, characterized in that the piston (24) is provided externally with a thread 32 which cooperates with the guide sleeve (33), internally threaded. 5.- Limiteur de débit selon les revendications 1 et 4, caractérisé en ce que le manchon (33) est rappelé par un ressort (34) contre le basculeur (18). 5. - Flow restrictor according to claims 1 and 4, characterized in that the sleeve (33) is returned by a spring (34) against the rocker (18).
EP91400262A 1990-02-13 1991-02-05 Flow regulator with differential pressure controlled membrane for a hot-water gas heater Expired - Lifetime EP0442777B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001659A FR2658263B1 (en) 1990-02-13 1990-02-13 WATER FLOW ADJUSTMENT LIMITER FOR A DIFFERENTIAL MEMBRANE CONTROL MECHANISM FOR A HOT WATER GAS APPARATUS.
FR9001659 1990-02-13

Publications (2)

Publication Number Publication Date
EP0442777A1 true EP0442777A1 (en) 1991-08-21
EP0442777B1 EP0442777B1 (en) 1993-10-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400262A Expired - Lifetime EP0442777B1 (en) 1990-02-13 1991-02-05 Flow regulator with differential pressure controlled membrane for a hot-water gas heater

Country Status (4)

Country Link
EP (1) EP0442777B1 (en)
DE (1) DE69100544T2 (en)
ES (1) ES2044689T3 (en)
FR (1) FR2658263B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE495177C (en) * 1930-04-03 Pintsch Julius Ag High pressure gas regulator
FR1514144A (en) * 1966-10-17 1968-02-23 Saunier Duval Gas mechanism for instantaneous water heaters or baths with variable output power
DE2531485B2 (en) * 1975-07-15 1977-05-05 Joh. Vaillant KG, 56 30 Remscheid GAS HEATED WATER HEATER
EP0172113A2 (en) * 1984-08-16 1986-02-19 Saunier Duval Eau Chaude Chauffage - Sdecc Water flow regulator for a gas-water heater adjustable by a control mechanism with a differential membrane

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE495177C (en) * 1930-04-03 Pintsch Julius Ag High pressure gas regulator
FR1514144A (en) * 1966-10-17 1968-02-23 Saunier Duval Gas mechanism for instantaneous water heaters or baths with variable output power
DE2531485B2 (en) * 1975-07-15 1977-05-05 Joh. Vaillant KG, 56 30 Remscheid GAS HEATED WATER HEATER
EP0172113A2 (en) * 1984-08-16 1986-02-19 Saunier Duval Eau Chaude Chauffage - Sdecc Water flow regulator for a gas-water heater adjustable by a control mechanism with a differential membrane

Also Published As

Publication number Publication date
ES2044689T3 (en) 1994-01-01
FR2658263B1 (en) 1992-05-29
EP0442777B1 (en) 1993-10-27
DE69100544T2 (en) 1994-05-11
DE69100544D1 (en) 1993-12-02
FR2658263A1 (en) 1991-08-16

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