EP0087989A1 - Volume flow regulator for a ventilating duct - Google Patents

Volume flow regulator for a ventilating duct Download PDF

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Publication number
EP0087989A1
EP0087989A1 EP83400104A EP83400104A EP0087989A1 EP 0087989 A1 EP0087989 A1 EP 0087989A1 EP 83400104 A EP83400104 A EP 83400104A EP 83400104 A EP83400104 A EP 83400104A EP 0087989 A1 EP0087989 A1 EP 0087989A1
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EP
European Patent Office
Prior art keywords
chamber
orifice
air
variations
main channel
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
EP83400104A
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German (de)
French (fr)
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EP0087989B1 (en
Inventor
Pierre Jardinier
Jack Simonnot
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.)
D'etudes Et De Recherches De Ventilation Et D'aeraulique - Serva Societe Dite Ste
Original Assignee
D'etudes Et De Recherches De Ventilation Et D'aeraulique - Serva Societe Dite Ste
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Priority to AT83400104T priority Critical patent/ATE13222T1/en
Publication of EP0087989A1 publication Critical patent/EP0087989A1/en
Application granted granted Critical
Publication of EP0087989B1 publication Critical patent/EP0087989B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/75—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for maintaining constant air flow rate or air velocity

Definitions

  • the present invention relates to an improvement in the flow stabilizer for ventilation duct described and claimed in French patents 70 12 065 and in European patent 80401321.7 of the Applicant.
  • the first of these patents relates to a stabilizer comprising a chamber formed by a deformable bladder, a seat supporting this chamber with an orifice allowing air to enter or leave the chamber, and means allowing adapt this seat to the ventilation duct, so that the aforementioned orifice is directed upstream, the respective dimensions of the chamber and of the section of the duct being such that under the action of the pressure differences existing upstream and downstream, the resulting variations in the volume of the chamber codify the cross-section of the air in the space provided between the chamber and the duct.
  • This stabilizer was designed to stabilize the air flow without amplifying the sudden fluctuations, and therefore without maintaining an oscillation regime in the duct.
  • the bladder constituting the chamber was made of a flexible and elastic material, due to the loss of elasticity of this material due to its aging, this stabilizer, although of a high cost price, was not very durable .
  • spring means are associated with the bladder constituting the chamber inside which they are housed to ensure its return to a minimum volume when the pressure difference, between the areas of the ventilation duct located upstream and downstream of it, drops below a predetermined threshold.
  • the bladder could be molded into the shape corresponding to its maximum volume, which, by the absence of undercut, facilitates its release, and its return to its minimum volume is no longer dependent on its own elasticity. Its longevity is therefore considerably increased.
  • the goal of improvement, object of this The invention is to provide a stabilizer of the aforementioned type, sensitive to the measured values of a variable parameter and able to operate when the pressures involved are very low, which is the case in air conditioning installations.
  • the inlet and outlet orifice of the deformable chamber is connected, by an auxiliary tube, to an associated pressure sensor, on the one hand , to means for amplifying the effect of the dynamic pressure of the air stream and, on the other hand, to means sensitive to variations in the chosen parameter, other than pressure, and acting on the sensor to modify its action on the deformable chamber as a function of the abovementioned variations of this parameter, at least when its value exceeds the limits of a predetermined range.
  • the body of the device has an auxiliary channel in the shape of a Venturi, constituting the means for amplifying the effect of the dynamic pressure of the air stream, the inlet and the outlet are located, respectively upstream and downstream of the deformable chamber, into the neck of which opens, through an orifice constituting the pressure sensor, the auxiliary tubing, and into the wall of which is formed downstream of the orifice of the aforementioned tubing, a cavity capable of accommodating a movable valve transversely to the channel, and the rod of which is articulated to a motion amplifying lever, itself coupled to means sensitive to variations in the chosen parameter, and associated with spring means, so as to control the withdrawal of the valve in its housing if the value of the selected parameter exceeds a predetermined set and vice versa.
  • the means sensitive to variations in this rate consist of the braid of a hygrometer subjected to the action of the air circulating in the duct, and a link articulated on the aforementioned lever, bears, by its free end, on the braid of the hygrometer, so as to pivot the lever in the direction corresponding to the outlet of the valve when the braid tightens as a result of the rate decrease humidity.
  • outlet of the valve resulting from the reduction in the humidity of the air causes an increase in the pressure in the part of the main channel situated upstream of this valve and, consequently, an inflation of the deformable chamber. and a decrease in the stabilized flow.
  • the pressure sensor is formed by a radial orifice formed at one end of a cylindrical tube mounted in the body of the stabilizer so that this end protrudes in part of the main channel located upstream or at the level of the deformable chamber, and the inner chamber of which communicates, by a sealed connection, with the auxiliary tubing, the means sensitive to variations in the chosen parameter being arranged to modify the position of the radial orifice aforementioned in the main channel as a function of said variations and thus amplify the effect on it of the dynamic pressure of the air stream circulating in the main channel.
  • the radial orifice constituting the sensor can be oriented perpendicular to the flow of the air stream and the modification of its position consist in a transverse displacement of the cylindrical tube in which the aforementioned radial orifice is formed between two extreme positions of which one corresponding to a maximum depression at the level of the sensor and consequently to a minimum volume of the chamber and a maximum air flow, is located at the level of the formable chamber and the other corresponded to a minimum depression at the level of the sensor and therefore at a maximum volume of the chamber and a minimum denial of air, is located upstream of the deformahle chamber.
  • the swelling of the croft deformable chamber and the stabilized flow decreases when the acptour is moved upstream, that is to say, is distant from the deformable chamber.
  • the cylindrical tube is mounted in the body, so that its end in which is formed the radial orifice constituting the pressure sensor is located at the level of the deformable chamber, c ' that is to say in the zone of smaller cross section of the main channel and consequently of higher speed of the air stream and so as to be able to pivot around its axis of revolution and its end opposite to that having a radial orifice constituting the pressure sensor is extended by a drive shaft coupled to means sensitive to variations in the chosen parameter and associated with spring means, so as to rotate the rotating tube between a position in which the aforementioned radial orifice in the direction where the air stream that flows in the main channel comes from, corresponding to maximum swelling of the deformable chamber in a position in which this orifice is oriented perp endicularly in the direction of flow of the air stream, corresponding to maximum deflation of the deformable chamber when the value of the chosen parameter increases, the tight connection between the internal chamber of the rotating tube and the auxiliary tub
  • the means sensitive to its variations and the spring means associated with them consist of a helical bimetallic strip, one end of which is fixed to the body of the stabilizer and the other end of which is moored à.l'angle extending one end of the rotating tube.
  • this stabilizer is the ty- pe described in EP 80401321.7, that is to say comprising a body 2 adapted to a conduit not shown ventilation in the drawing and in which is formed at least one main channel 3, a chamber 4 constituted by a deformable bladder 5 disposed in the main channel 3, a seat 6 supporting this bladder 5, with the provision of a small section orifice 7 allowing to the air entering and leaving chamber 4 and means making it possible to adapt this seat 6 to the body 2 of the device.
  • the respective dimensions of the chamber 4 and the cross sections of the main channel 3 are such that under the action of the pressure differences existing upstream and downstream of the bladder 5, the variations in volumes of the chamber 4 which result therefrom modify the air passage section in the space provided between the walls of the chamber 4 and those of the main channel 3.
  • a spring 8 carried by the seat 6 can be associated with the bladder 5 to normally return the chamber 4 to the minimum volume position.
  • This known stabilizer therefore has the function of stabilizing the air flow in the ventilation duct independently of the variations in the difference in pressures existing upstream and downstream of the device.
  • the aim of the present invention is to allow automatic adjustment of the adjustment of this stabilized flow according to variations in a parameter other than the pressure, and in particular, at the temperature or humidity conditions of the air over determined ranges of these parameters and even if the pressures involved are very low, as is the case in air conditioning installations.
  • the inlet and outlet orifice 7 of the chamber 4 is connected by an auxiliary tube 9 to a pressure sensor associated with means sensitive to variations in the chosen parameter and acting on it to modify its action on the chamber 4 as a function of variations in this parameter, at least when its value exceeds the limits of a predetermined range, and amplify the effect on the pressure sensor of the dynamic pressure of the air stream.
  • the parameter chosen is the rate of hygrometry of the air circulating in the ventilation duct and the means sensitive to variations in this parameter are, quite naturally, constituted by the braid lla a hygrometer 11 carried by the body 2 of the device so that the braid 11a is licked by the air flow circulating in the ventilation duct.
  • the upstream wall of the body 2 has an opening 12 allowing the penetration of an air flow licking the braid 11a over its entire length.
  • the body 2 has an auxiliary channel 13 in the form of a Venturi and constituting the means for amplifying the effect of the dynamic pressure of the air stream on the pressure sensor.
  • the inlet and outlet of this auxiliary channel 13 are located, respectively upstream and downstream of the deformable chamber 4.
  • the auxiliary tubing 9 connecting the inlet and outlet orifice 7 of the chamber 4 to the pressure sensor opens out in the auxiliary channel 13 at its neck 13a through an orifice 14 constituting the pressure sensor itself.
  • auxiliary channel 13 In the wall of the auxiliary channel 13 is formed, downstream from the neck 13a and, consequently, from the orifice 14 of the auxiliary tube 9 a cavity 15 capable of accommodating a valve 16 movable transversely to the auxiliary channel 13 between two extreme positions l 'one of withdrawal shown in solid lines in Figure 2 and the other total output shown in lines mixed in this same figure, second position in which the valve 16 almost completely obstructs the auxiliary channel 13.
  • This valve 16 is carried by a rod 17 sliding axially in a bearing 18 and whose free end is articulated at one end of a lever 19 itself articulated on a horizontal axis 21 carried by the body 2 of the 'apparatus and whose balancing is ensured by a counterweight 22.
  • a link 23 articulated by one of these ends at a point of the lever 19 located between its end articulated to the rod 17 and its axis of articulation 21 takes support, by its other end 23a in the form of a fork against the braid 11a of the hygrometer 11, normally at the latter.
  • a spiral spring 20 bearing on the one hand on the lever 19 and on the other hand on its articulation axis 21 tends to normally maintain the fork end 23a of the rod 23 applied against the braid 11a of the hygrometer 11.
  • the braid 11a of the hygrometer 11 is normally made of polyamide, and its length is very dependent on the relative humidity of the air.
  • the aforementioned spring 20 therefore maintains the tension of the braid 11a.
  • the deformation of the bladder 5 depends on the pressures exerted on the outer faces of its walls and on the pressure imposed on its interior by means of the pressure sensor 14 and the auxiliary tubing 9.
  • the difference between the pressure P 2 prevailing downstream of the stabilizer and that of the pressure Pv imposed inside the bladder 5 or Pv - P 2 is equal to k (P 1 - P 2 ) formula in which P is the pressure prevailing upstream of the stabilizer, and k a coefficient dependent on the position of the valve 16 relative to the auxiliary channel 13 and, consequently, on the relative humidity of the air.
  • Pv For relative humidities between 30 and 70% the valve 16 partially obstructs the auxiliary channel 13, Pv therefore takes an intermediate value between P 1 and P 2 , k being positive and less than 1. k decreases when the relative humidity increases.
  • the pressures to which the lateral walls and the rear face of the bladder 5 are subjected, from the outside, are substantially equal to P 2 ; thus in the value range between 30% and 70% of the relative humidity of the air, the differences between the pressures exerted inside and outside tend to inflate the bladder 5.
  • P 1 - P 2 increases, Pv - P 2 increases, the bladder inflates and the passage for air decreases so as to maintain the flow d air at a value roughly independent of the driving pressure.
  • the value of the flow thus stabilized depends on k, therefore on the relative humidity rate; this value is higher the higher the relative humidity.
  • valve 16 disappears completely in its housing 15; the Venturi-shaped auxiliary channel 13 is no longer disturbed by the presence of the valve 16 and the static pressure at the neck 13a and, consequently, of the pressure sensor 14 decreases considerably to reach values lower than the pressure P 2 reigning downstream; the coefficient k is then negative; the lume of the bladder 5 decreases and becomes less than its v me at rest.
  • the air flow in the ventilation duct increases considerably; it is no longer stabilized but in this case, the desired goal is achieved, since the operation of this stabilizer aims to restore very quickly; normal ambient conditions.
  • the parameter chosen is the temperature.
  • a cylj tube that 24 is pivotally mounted around its axis of revolutic a bearing formed in the body 2 of the device, and me that one of its ends is projecting in the space between the chamber 4 and the lateral wall of the pi cipal canal 3, that is to say in the zone of weaker sectia main channel 3 and higher speed of the vein
  • the other end of this tube 24 is extended by an ar located outside the body 2.
  • This tube 24 which is closed at its two ends p; diametrical walls, present, at its projecting end. the main channel 3, a radial orifice 26 constituting the pressure tor and, in the vicinity of its other extremit radial orifice 27 communicating by means of a turn 28 with the auxiliary tubing 9.
  • Air seals 29 seal between the tube 24, the DC of the device and the rotary joint 28.
  • a bimetallic strip 31 is helically rolled on the shaft 25 extending the thou one of the ends of this bimetallic strip 31 being fixed to 2 while its other end is integral arb
  • This flow regulator regulated as a function of temperature is particularly intended for the evacuation of burns from domestic gas boilers.
  • the flow rate of the evacuated smoke must increase, implies a reduction in the volume of the deformable chamber 4 when the temperature increases.
  • the pressure take-off orifice 26 When the temperature is low, the pressure take-off orifice 26 is oriented facing the air flow circulating in the pipeline, that is to say in the main channel 3, as illustrated in FIG. 3.
  • the sensor pressure 26 therefore receives a maximum pressure which it transmits inside the chamber 4.
  • the volume of the latter reaches its maximum possible value with a determined driving pressure P 1 - P 2 .
  • the flow is stabilized at a low value when P1 - P 2 varies.
  • the bimetallic strip 31 drives the shaft 25 and the tube 24 in rotation, which tends to clear the orifice 26 relative to the air flow, so that the intake of the air is subjected to less pressure.
  • the volume of the chamber 4 decreases and the passage for the gases increases.
  • the flow through the main channel 3 of the stabilizer is therefore stabilized at a higher value.
  • this stabilizer is not limited to the sole embodiments of this stabilizer which have been described above, by way of non-limiting example; on the contrary, it embraces all variants of it.
  • this stabilizer could be associated with means sensitive to temperature, while, conversely, in its embodiment illustrated by the Figures 3 and 4, it could be associated with means sensitive to the relative humidity of the air.

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  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Air-Flow Control Members (AREA)
  • Duct Arrangements (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Pipe Accessories (AREA)
  • Measuring Fluid Pressure (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Motor Or Generator Frames (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

A stabilizer for a ventilation duct includes a sensor, sensitive to a variable parameter such as temperature, which affects the flow of air in the duct. The sensor includes an opening in a return flow conduit communicating with a deformable chamber contained within a section of the duct. As the parameter changes, pressure at the opening changes thereby affecting the volume of the chamber and likewise the volume of the section of the duct in which the chamber is located.

Description

La présente invention concerne un perfectionnement au stabilisateur de débit pour conduit de ventilation décrit et revendiqué dans les brevets français 70 12 065 et dans le brevet européen 80401321.7 de la Demanderesse.The present invention relates to an improvement in the flow stabilizer for ventilation duct described and claimed in French patents 70 12 065 and in European patent 80401321.7 of the Applicant.

Le premier de ces brevets concerne un stabilisateur comprenant une chambre constituée par une vessie déformable, un siège supportant cette chambre avec ménagement d'un orifice permettant à l'air de pénétrer dans la chambre, ou d'en sortir, et des moyens permettant d'adapter ce siège au conduit de ventilation, de manière que l'orifice précité soit dirigé vers l'amont, les dimensions respectives de la chambre et de la section du conduit étant telles que sous l'action des différences de pressions existant en amont et en aval, les variations de volume de la chambre qui en résultent codifient la section de passage de l'air dans l'espace ménagé entre la chambre et le conduit.The first of these patents relates to a stabilizer comprising a chamber formed by a deformable bladder, a seat supporting this chamber with an orifice allowing air to enter or leave the chamber, and means allowing adapt this seat to the ventilation duct, so that the aforementioned orifice is directed upstream, the respective dimensions of the chamber and of the section of the duct being such that under the action of the pressure differences existing upstream and downstream, the resulting variations in the volume of the chamber codify the cross-section of the air in the space provided between the chamber and the duct.

Ce stabilisateur avait été conçu pour stabiliser le débit d'air sans en amplifier les fluctuations brutales, et par conséquent sans entretenir un régime d'oscillation dans le conduit.This stabilizer was designed to stabilize the air flow without amplifying the sudden fluctuations, and therefore without maintaining an oscillation regime in the duct.

Bien que la vessie constituant la chambre fut réalisée en une matière souple et élastique, en raison de la perte d'élasticité de cette matière due à son vieillissement,ce stabilisateur, pourtant d'un prix de revient élevé, n'était que peu durable.Although the bladder constituting the chamber was made of a flexible and elastic material, due to the loss of elasticity of this material due to its aging, this stabilizer, although of a high cost price, was not very durable .

Pour remédier à cet inconvénient, selon le second de ces brevets, des moyens à ressort sont associés à la vessie constituant la chambre à l'intérieur de laquelle ils sont logés pour assurer son retour à un volurne minimal lorsque la différence de pression, entre les zones du conduit de ventilation situées en amont et en aval d'elle, descend en dessous d'un seuil prédéterminé.To remedy this drawback, according to the second of these patents, spring means are associated with the bladder constituting the chamber inside which they are housed to ensure its return to a minimum volume when the pressure difference, between the areas of the ventilation duct located upstream and downstream of it, drops below a predetermined threshold.

Ainsi, la vessie pouvait étre moulée dans la forme correspondant à son volume maximal, ce qui, par l'absence de contredépouille, facilite son démoulage, et son retour à son volume minimal n'est plus tributaire de son élasticité propre. Sa longévité en est donc considérablement augmentée.Thus, the bladder could be molded into the shape corresponding to its maximum volume, which, by the absence of undercut, facilitates its release, and its return to its minimum volume is no longer dependent on its own elasticity. Its longevity is therefore considerably increased.

Le but du perfectionnement, objet de la présente invention est de fournir un stabilisateur du type précité, sensible aux valeurs mesurées d'un paramètre variable et apte à fonctionner lorsque les pressions mises en jeu sont très faibles,ce qui est le cas dans les installations de climatisation.The goal of improvement, object of this The invention is to provide a stabilizer of the aforementioned type, sensitive to the measured values of a variable parameter and able to operate when the pressures involved are very low, which is the case in air conditioning installations.

A cet effet, dans le stabilisateur qu'elle concerne et qui est du type précité, l'orifice d'entrée et de sortie de la chambre déformable est relié, par une tubulure auxiliaire, à un capteur de pression associé,d'une part,à des moyens d'amplification de l'effet de la pression dynamique de la veine d'air et d'autre part, à des moyens sensibles aux variations du paramètre choisi, autre que la pression,et agissant sur le capteur pour modifier son action sur la chambre déformable en fonction des variations précitées de ce paramètre, au moins lorsque sa valeur dépasse les limites d'une plage prédéterminée.To this end, in the stabilizer which it relates to and which is of the aforementioned type, the inlet and outlet orifice of the deformable chamber is connected, by an auxiliary tube, to an associated pressure sensor, on the one hand , to means for amplifying the effect of the dynamic pressure of the air stream and, on the other hand, to means sensitive to variations in the chosen parameter, other than pressure, and acting on the sensor to modify its action on the deformable chamber as a function of the abovementioned variations of this parameter, at least when its value exceeds the limits of a predetermined range.

Il en résulte que le débit contrôlé par ce stabilisateur varie en fonction des variations du paramètre choisi.As a result, the flow rate controlled by this stabilizer varies according to variations in the chosen parameter.

Suivant une première forme d'exécution de ce stabilisateur, le corps du dispositif présente un canal auxiliaire en forme de Venturi, constituant les moyens d'amplification de l'effet de la pression dynamique de la veine d'air, dont l'entrée et la sortie sont situées, respectivement en amont et en aval de la chambre déformable, dans le col duquel débouche,par un orifice constituant le capteur de pression, la tubulure auxiliaire, et dans la paroi duquel est ménagée en aval de l'orifice de la tubulure précitée, une cavité apte à loger un clapet mobile transversalement au canal, et dont la tige est articulée à un levier amplificateur de mouvements, lui-même accouplé aux moyens sensibles aux variations du paramètre choisi,et associés à des moyens à ressort, de manière à commander le retrait du clapet dans son logement si la valeur du paramètre choisi dépasse un setil prédéterminé et inversement.According to a first embodiment of this stabilizer, the body of the device has an auxiliary channel in the shape of a Venturi, constituting the means for amplifying the effect of the dynamic pressure of the air stream, the inlet and the outlet are located, respectively upstream and downstream of the deformable chamber, into the neck of which opens, through an orifice constituting the pressure sensor, the auxiliary tubing, and into the wall of which is formed downstream of the orifice of the aforementioned tubing, a cavity capable of accommodating a movable valve transversely to the channel, and the rod of which is articulated to a motion amplifying lever, itself coupled to means sensitive to variations in the chosen parameter, and associated with spring means, so as to control the withdrawal of the valve in its housing if the value of the selected parameter exceeds a predetermined set and vice versa.

Si, par exemple, Ie paramètre choisi est le taux d'humidité de l'air, les moyens sensibles aux variations de ce taux sont constitués par la tresse d'un hygromètre soumis à l'action de l'air circulant dans le conduit, et une biellette articulée sur le levier précité, prend appui,par son extrémité libre, sur la tresse de l'hygromètre,de manière à faire pivoter le levier dans le sens correspondant à la sortie du claPet lorsque la tresse se tend par suite de la diminution du taux d'humidité.If, for example, the chosen parameter is the air humidity level, the means sensitive to variations in this rate consist of the braid of a hygrometer subjected to the action of the air circulating in the duct, and a link articulated on the aforementioned lever, bears, by its free end, on the braid of the hygrometer, so as to pivot the lever in the direction corresponding to the outlet of the valve when the braid tightens as a result of the rate decrease humidity.

On comprendra aisément que la sortie du clapet résultant de la diminution du taux d'humidité de l'air entraîne une augmentation de la pression dans la partie du canal principal située en amont de ce clapet et, par conséquent,un gonflement de la chambre déformable et une diminution du débit stabilisé.It will easily be understood that the outlet of the valve resulting from the reduction in the humidity of the air causes an increase in the pressure in the part of the main channel situated upstream of this valve and, consequently, an inflation of the deformable chamber. and a decrease in the stabilized flow.

Suivant une variante d'exécution de l'invention, le capteur de pression est constjtué par un orifice radial ménagé à l'une des extrémités d'un tube cylindrique monté dans le corps du stabilisateur de manière que cette extrémité soit en saillie dans une partie du canal principal située en amont ou au niveau de la chambre déformable,et dont la chambre intérieure communique,par une liaison étanche, avec la tubulure auxiliaire, les moyens sensibles aux variations du paramètre choisi étant agencés pour modifier la position de l'orifice radial précité dans le canal principal en fonction desdites variations et amplifier ainsi l'effet sur lui de la pression dynamique de la veine d'air circulant dans le canal principal.According to an alternative embodiment of the invention, the pressure sensor is formed by a radial orifice formed at one end of a cylindrical tube mounted in the body of the stabilizer so that this end protrudes in part of the main channel located upstream or at the level of the deformable chamber, and the inner chamber of which communicates, by a sealed connection, with the auxiliary tubing, the means sensitive to variations in the chosen parameter being arranged to modify the position of the radial orifice aforementioned in the main channel as a function of said variations and thus amplify the effect on it of the dynamic pressure of the air stream circulating in the main channel.

En modifiant la position du capteur ce pression dans la veinc d'air,on modifie l'incidence de la pression dynamique de cette veine d'air sur le fonctionnement du stabilisateur. par exemple, l'orifice radial constituant le capteur peut être orienté perpendiculairement au flux de la veine d'air et la modification de sa position consister en un déplacement transversal du tube cylindrique dans lequel est ménagé l'orifice radial précité entre deux positions extrêmes dont l'une correspondant à une dépression maximale au niveau du capteur et par conséquent à un volume minimal de la chambre et un débit d'air maximal, est située au niveau de la chambre céformable et l'autre correspondait à une dépression minimale au niveau du capteur et par conpéquent à un volume maximal de la chambre et un dénit d'air minimal, est située en amont de la chambre déformahle.By modifying the position of the pressure sensor in the air stream, the effect of the dynamic pressure of this air stream on the operation of the stabilizer is modified. for example, the radial orifice constituting the sensor can be oriented perpendicular to the flow of the air stream and the modification of its position consist in a transverse displacement of the cylindrical tube in which the aforementioned radial orifice is formed between two extreme positions of which one corresponding to a maximum depression at the level of the sensor and consequently to a minimum volume of the chamber and a maximum air flow, is located at the level of the formable chamber and the other corresponded to a minimum depression at the level of the sensor and therefore at a maximum volume of the chamber and a minimum denial of air, is located upstream of the deformahle chamber.

Ainsi,pour un môme débit d'air, le gonflement de la chambre déformable croft et le débit stabilisé diminue lorsque le acptour est déplacé vers l'amont, c'est-à-dire, est éloigné de la chambre déformable.Thus, for the same air flow, the swelling of the croft deformable chamber and the stabilized flow decreases when the acptour is moved upstream, that is to say, is distant from the deformable chamber.

Suivant une autre forme d'exécution particulière de cette variante, le tube cylindrique est monté dans le corps, de manière que son extrémité dans laquelle est ménagé l'orifice radial constituant le capteur de pression soit située au niveau de la chambre déformable, c'est-à-dire dans la zone de plus faible section du canal principal et par conséquent de plus grande vitesse de la veine d'air et de manière à pouvoir pivoter autour de son axe de révolution et son extrémité opposée à celle présentant un orifice radial constituant le capteur de pression est prolongée par un arbre de manoeuvre accouplé aux moyens sensibles aux variations du paramètre choisi et associé à des moyens à ressort, de manière à faire pivoter le tube tournant entre une position dans laquelle l'orifice radial précité dans la direction d'où provient la veine d'air qui circule dans le canal principal correspondant à un gonflement maximal de la chambre déformable à une position dans laquelle cet orifice est orienté perpendiculairement au sens d'écoulement de la veine d'air, correspondant à un dégonflement maximal de la chambre déformable lorsque la valeur du paramètre choisi augmente, la liaison étanche entre la chambre intérieure du tube tournant et la tubulure auxiliaire étant assurée par un joint tournant.According to another particular embodiment of this variant, the cylindrical tube is mounted in the body, so that its end in which is formed the radial orifice constituting the pressure sensor is located at the level of the deformable chamber, c ' that is to say in the zone of smaller cross section of the main channel and consequently of higher speed of the air stream and so as to be able to pivot around its axis of revolution and its end opposite to that having a radial orifice constituting the pressure sensor is extended by a drive shaft coupled to means sensitive to variations in the chosen parameter and associated with spring means, so as to rotate the rotating tube between a position in which the aforementioned radial orifice in the direction where the air stream that flows in the main channel comes from, corresponding to maximum swelling of the deformable chamber in a position in which this orifice is oriented perp endicularly in the direction of flow of the air stream, corresponding to maximum deflation of the deformable chamber when the value of the chosen parameter increases, the tight connection between the internal chamber of the rotating tube and the auxiliary tubing being ensured by a rotating joint .

.On conçoit aisément que, lorsque l'orifice radial constituant le capteur de pression est orienté perpendiculairement au sens d'écoulement de la veine d'air, la chambre interne du tube tournant, et par conséquent la chambre déformable, sont soumises à une dépression engendrée par écoulement de la veine d'air tangentiellement à l'orifice radial précité..It is easy to understand that, when the radial orifice constituting the pressure sensor is oriented perpendicular to the direction of flow of the air stream, the internal chamber of the rotating tube, and consequently the deformable chamber, are subjected to a vacuum generated by flow of the air stream tangentially to the aforementioned radial orifice.

Si, par exemple, le paramètre choisi est la température, les moyens sensibles à ses variations et les moyens à ressort qui leur sont associés sont constitués par une bilame hélicoïdale dont une extrémité est fixée au corps du stabilisateur et dont l'autre extrémité est amarrée à.l'arbre prolongeant l'une des extrémités du tube tournant.If, for example, the chosen parameter is the temperature, the means sensitive to its variations and the spring means associated with them consist of a helical bimetallic strip, one end of which is fixed to the body of the stabilizer and the other end of which is moored à.l'arbre extending one end of the rotating tube.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant, à titre d'exemple ion limitatif, deux formes d'exécution de ce stabilisateur :

  • Les figures 1 et 2 sont des vues en coupe suivant respectivement 1-1 de la figure 2 et.2-2 de la figure 1 montrant une première forme d'exécution de ce stabilisateur dans le cas où le paramètre choisi est le taux d'humidité de l'air ;
  • La figure 3 est une vue en coupe similaire à la figure 1 montrant une seconde forme d'exécution de ce stabilisateur dans le cas où le paramètre choisi est la température ;
  • La figure 4 montre, à échelle agrandie, un détail de la figure 3.
In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing, representing, by way of limiting example, two embodiments of this stabilizer:
  • Figures 1 and 2 are sectional views along respectively 1-1 of Figure 2 and.2-2 of Figure 1 showing a first embodiment of this stabilizer in the case where the chosen parameter is the rate of air humidity;
  • Figure 3 is a sectional view similar to Figure 1 showing a second embodiment of this stabilizer in the case where the chosen parameter is the temperature;
  • FIG. 4 shows, on an enlarged scale, a detail of FIG. 3.

Comme indiqué précédemment, dans ces deux formes d'exécution illustrées sur le dessin, ce stabilisateur est du ty- pe décrit dans le brevet européen 80401321.7 , c'est-à-dire comprenant un corps 2 adaptable à un conduit de ventilation non représenté sur le dessin et dans lequel est ménagé au moins un canal principal 3, une chambre 4 constituée par une vessie déformable 5 disposée dans le canal principal 3, un siège 6 supportant cette vessie 5, avec ménagement d'un orifice de faible section 7 permettant à l'air de pénétrer dans la chambre 4 et d'en sortir et des moyens permettant d'adapter ce siège 6 au corps 2 de l'appareil. Les dimensions respectives de la chambre 4 et des sections transversales du canal principal 3 sont telles que sous l'action des différences de pression existant en amont et en aval de la vessie 5, les variations de volumes de la chambre 4 qui en résultent modifient la section de passage de l'air dans l'espace ménagé entre les parois de la chambre 4 et celles du canal principal 3.As previously indicated, in both embodiments illustrated in the drawing, this stabilizer is the ty- pe described in EP 80401321.7, that is to say comprising a body 2 adapted to a conduit not shown ventilation in the drawing and in which is formed at least one main channel 3, a chamber 4 constituted by a deformable bladder 5 disposed in the main channel 3, a seat 6 supporting this bladder 5, with the provision of a small section orifice 7 allowing to the air entering and leaving chamber 4 and means making it possible to adapt this seat 6 to the body 2 of the device. The respective dimensions of the chamber 4 and the cross sections of the main channel 3 are such that under the action of the pressure differences existing upstream and downstream of the bladder 5, the variations in volumes of the chamber 4 which result therefrom modify the air passage section in the space provided between the walls of the chamber 4 and those of the main channel 3.

Un ressort 8 porté par le siège 6 peut être associé à la vessie 5 pour rappeler normalement la chambre 4 en position de volume minimal.A spring 8 carried by the seat 6 can be associated with the bladder 5 to normally return the chamber 4 to the minimum volume position.

Ce stabilisateur connu a donc pour fonction de stabiliser le débit d'air dans le conduit de ventilation indépendamment des variations de la différence des pressions existant en amont et en aval de l'appareil.This known stabilizer therefore has the function of stabilizing the air flow in the ventilation duct independently of the variations in the difference in pressures existing upstream and downstream of the device.

Le but de la présente invention est de permettre une adaptation automatique du réglage de ce débit stabilisé en fonction des variations d'un paramètre autre que la pression, et notamment, aux conditions de température ou d'humidité de l'air sur des plages déterminées de ces paramètres et même si les pressions mises en jeu sont très faibles, comme c'est le cas dans les installations de climatisation.The aim of the present invention is to allow automatic adjustment of the adjustment of this stabilized flow according to variations in a parameter other than the pressure, and in particular, at the temperature or humidity conditions of the air over determined ranges of these parameters and even if the pressures involved are very low, as is the case in air conditioning installations.

A cet effet, l'orifice d'entrée et de sortie 7 de la chambre 4 est relié par une tubulure auxiliaire 9 à un capteur de pression associé à des moyens sensibles aux variations du paramètre choisi et agissant sur lui pour modifier son action sur la chambre 4 en fonction des variations de ce paramètre, au moins lorsque sa valeur dépasse les limites d'une plage prédéterminée,et amplifier l'effet sur le capteur de pression, de la pression dynamique de la veine d'air.To this end, the inlet and outlet orifice 7 of the chamber 4 is connected by an auxiliary tube 9 to a pressure sensor associated with means sensitive to variations in the chosen parameter and acting on it to modify its action on the chamber 4 as a function of variations in this parameter, at least when its value exceeds the limits of a predetermined range, and amplify the effect on the pressure sensor of the dynamic pressure of the air stream.

Dans l'exemple illustré sur les figures 1 et 2, le paramètre choisi est le taux d'hygrométrie de l'air circulant dans le conduit de ventilation et les moyens sensibles aux variations de ce paramètre sont, tout naturellement, constitués par la tresse lla d'un hygromètre 11 porté par le corps 2 de l'appareil de manière que la tresse 11a soit léchée par le flux d'air circulant dans le conduit de ventilation. A cet effet, la paroi amont du corps 2 présente une ouverture 12 autorisant la pénétration-d'un flux d'air léchant la tresse 11a sur toute sa longueur.In the example illustrated in FIGS. 1 and 2, the parameter chosen is the rate of hygrometry of the air circulating in the ventilation duct and the means sensitive to variations in this parameter are, quite naturally, constituted by the braid lla a hygrometer 11 carried by the body 2 of the device so that the braid 11a is licked by the air flow circulating in the ventilation duct. To this end, the upstream wall of the body 2 has an opening 12 allowing the penetration of an air flow licking the braid 11a over its entire length.

Dans cet exemple, le corps 2 présente un canal auxiliaire 13 en forme de Venturi et constituant les moyens d'amplification de l'effet de la pression dynamique de la veine d'air sur le capteur de pression. L'entrée et la sortie de ce canal auxiliaire 13 sont situées, respectivement en amont et en aval de la chambre déformable 4. La tubulure auxiliaire 9 reliant l'orifice 7 d'entrée et de sortie de la chambre 4 au capteur de pression débouche dans le canal auxiliaire 13 au niveau de son col 13a par un orifice 14 constituant le capteur de pression proprement dit.In this example, the body 2 has an auxiliary channel 13 in the form of a Venturi and constituting the means for amplifying the effect of the dynamic pressure of the air stream on the pressure sensor. The inlet and outlet of this auxiliary channel 13 are located, respectively upstream and downstream of the deformable chamber 4. The auxiliary tubing 9 connecting the inlet and outlet orifice 7 of the chamber 4 to the pressure sensor opens out in the auxiliary channel 13 at its neck 13a through an orifice 14 constituting the pressure sensor itself.

Dans la paroi du canal auxiliaire 13 est ménagée, en aval du col 13a et, par conséquent, de l'orifice 14 de la tubulure auxiliaire 9 une cavité 15 apte à loger un clapet 16 mobile transversalement au canal auxiliaire 13 entre deux positions extrêmes l'une de retrait représentée en traits pleins sur la figure 2 et l'autre de sortie totale représentée en traits mixtes sur cette même figure, seconde position dans laquelle le clapet 16 obstrue pratiquement totalement le canal auxiliaire 13.In the wall of the auxiliary channel 13 is formed, downstream from the neck 13a and, consequently, from the orifice 14 of the auxiliary tube 9 a cavity 15 capable of accommodating a valve 16 movable transversely to the auxiliary channel 13 between two extreme positions l 'one of withdrawal shown in solid lines in Figure 2 and the other total output shown in lines mixed in this same figure, second position in which the valve 16 almost completely obstructs the auxiliary channel 13.

Ce clapet 16 est porté par une tige 17 coulissant axialement dans un palier 18 et dont l'extrémité libre est articulée à l'une des extrémités d'un levier 19 lui-même articulé sur un axe horizontal 21 porté par le corps 2 de l'appareil et dont l'équilibrage est assuré par un contre-poids 22. Une biellette 23 articulée par l'une de ces extrémités en un point du levier 19 situé entre son extrémité articulée à la tige 17 et son axe d'articulation 21 prend appui, par son autre extrémité 23a en forme de fourchette contre la tresse 11a de l'hygromètre 11, normalement à cette dernière. Un ressort en spirale 20 prenant appui d'une part sur le levier 19 et d'autre part sur son axe d'articulation 21 tend à maintenir normalement l'extrémité en fourchette 23a de la biellette 23 appliquée contre la tresse 11a de l'hygromètre 11.This valve 16 is carried by a rod 17 sliding axially in a bearing 18 and whose free end is articulated at one end of a lever 19 itself articulated on a horizontal axis 21 carried by the body 2 of the 'apparatus and whose balancing is ensured by a counterweight 22. A link 23 articulated by one of these ends at a point of the lever 19 located between its end articulated to the rod 17 and its axis of articulation 21 takes support, by its other end 23a in the form of a fork against the braid 11a of the hygrometer 11, normally at the latter. A spiral spring 20 bearing on the one hand on the lever 19 and on the other hand on its articulation axis 21 tends to normally maintain the fork end 23a of the rod 23 applied against the braid 11a of the hygrometer 11.

La tresse 11a de l'hygromètre 11 est normalement en polyamide, et sa longueur est très dépendante de l'humidité relative de l'air. Le ressort précité 20 assure donc le maintien en tension de la tresse 11a.The braid 11a of the hygrometer 11 is normally made of polyamide, and its length is very dependent on the relative humidity of the air. The aforementioned spring 20 therefore maintains the tension of the braid 11a.

Le principe de fonctionnement de ce stabilisateur est le suivant :The operating principle of this stabilizer is as follows:

Dans des conditions courantes d'utilisation correspondant à des humidités relatives comprises entre 30 et 70%, la longueur de la tresse 11a est telle que le clapet 16 est engagé partiellement en travers du canal auxiliaire 13. Cette position est donc une position intermédiaire entre celles extrêmes représentées sur la figure 2.Under current conditions of use corresponding to relative humidities of between 30 and 70%, the length of the braid 11a is such that the valve 16 is partially engaged across the auxiliary channel 13. This position is therefore an intermediate position between those extremes shown in Figure 2.

Lorsque l'humidité relative de l'air diminue, la longueur de la tresse Ila diminue, ce qui provoque un déplacement de la biellette 23 et, par conséquent, un déplacement amplifié de l'extrémité du levier 19 articulé à la tige 17 et un déplacement correspondant du clapet 16 en direction de sa position extrême sortie. Le clapet 16 tend donc à obstruer davantage le canal auxiliaire 13. Lorsque l'humidité relative de l'air augmente, les déplacements du clapet 16 et des organes qui le commandent sont évidemment inversés.When the relative humidity of the air decreases, the length of the braid Ila decreases, which causes a displacement of the rod 23 and, consequently, an amplified displacement of the end of the lever 19 articulated to the rod 17 and a corresponding movement of the valve 16 in the direction of its extreme extended position. The valve 16 therefore tends to further obstruct the auxiliary channel 13. When the relative humidity of the air increases, the movements of the valve 16 and of the members which control it are obviously reversed.

La déformation de la vessie 5 dépend des pressions s'exerçant sur les faces extérieures de ses parois et de la pression imposée à son intérieur par l'intermédiaire du capteur de pression 14 et de la tubulure auxiliaire 9. La différence entre la pression P2 régnant en aval du stabilisateur et celle de la pression Pv imposée à l'intérieur de la vessie 5 soit Pv - P2 est égale à k (P1- P2) formule dans laquelle P est la pression régnant en amont du stabilisateur, et k un coefficient dépendant de la position du clapet 16 par rapport au canal auxiliaire 13 et, par conséquent, de l'humidité relative de l'air.The deformation of the bladder 5 depends on the pressures exerted on the outer faces of its walls and on the pressure imposed on its interior by means of the pressure sensor 14 and the auxiliary tubing 9. The difference between the pressure P 2 prevailing downstream of the stabilizer and that of the pressure Pv imposed inside the bladder 5 or Pv - P 2 is equal to k (P 1 - P 2 ) formula in which P is the pressure prevailing upstream of the stabilizer, and k a coefficient dependent on the position of the valve 16 relative to the auxiliary channel 13 and, consequently, on the relative humidity of the air.

Pour des humidités relatives comprises entre 30 et 70% le clapet 16 obstrue partiellement le canal auxiliaire 13, Pv prend donc une valeur intermédiaire entre P1 et P2, k étant positif et inférieur à 1. k décroît lorsque l'humidité relative croît.For relative humidities between 30 and 70% the valve 16 partially obstructs the auxiliary channel 13, Pv therefore takes an intermediate value between P 1 and P 2 , k being positive and less than 1. k decreases when the relative humidity increases.

Les pressions auxquelles sont soumises, depuis l'exté- tieur, les parois latérales et la face postérieure de la vessie 5 sont sensiblement égales à P2 ; ainsi sur la plage de valeur comprise entre 30% et 70% du taux d'humidité relative de l'air, les différences entre les pressions exercées à l'intérieur et à l'extérieur ont tendance à gonfler la vessie 5. Pour une humidité relative déterminée comprise entre 30% et 70%, lorsque la pression motrice de l'air P1- P2 croît, Pv - P2 croit, la vessie se gonfle et le passage pour l'air diminue de façon à maintenir le débit d'air à une valeur a peu près indépendante de la pression motrice.The pressures to which the lateral walls and the rear face of the bladder 5 are subjected, from the outside, are substantially equal to P 2 ; thus in the value range between 30% and 70% of the relative humidity of the air, the differences between the pressures exerted inside and outside tend to inflate the bladder 5. For humidity determined relative between 30% and 70%, when the driving pressure of the air P 1 - P 2 increases, Pv - P 2 increases, the bladder inflates and the passage for air decreases so as to maintain the flow d air at a value roughly independent of the driving pressure.

La valeur du débit ainsi stabilisée dépend de k, donc du taux d'humidité relative ; cette valeur est d'autant plus forte que l'humidité relative est forte.The value of the flow thus stabilized depends on k, therefore on the relative humidity rate; this value is higher the higher the relative humidity.

Pour des humidités relatives très élevées, par exemple 90%, conditions temporaires correspondant par exemple à l'utilisation de douche ou de bain, le clapet 16 s'efface totalement dans son logement 15; le canal auxiliaire en forme de Venturi 13 n'est plus perturbé par la présence du clapet 16 et la pression statique au niveau du col 13a et, par conséquent, du capteur de pression 14 décroit considérablement pour atteindre des valeurs inférieures à la pression P2 régnant en aval; le coefficient k est alors négatif; le lume de la vessie 5 diminue et devient inférieur à son v me au repos. Le débit d'air dans le conduit de ventilati s'accroît considérablement; il n'est plus stabilisé mais dans ce cas, le but recherché est atteint, puisque le fe tionnement de ce stabilisateur vise à rétablir très rap; ment les conditions ambiantes normales.For very high relative humidities, for example 90%, temporary conditions corresponding for example to the use of a shower or bath, the valve 16 disappears completely in its housing 15; the Venturi-shaped auxiliary channel 13 is no longer disturbed by the presence of the valve 16 and the static pressure at the neck 13a and, consequently, of the pressure sensor 14 decreases considerably to reach values lower than the pressure P 2 reigning downstream; the coefficient k is then negative; the lume of the bladder 5 decreases and becomes less than its v me at rest. The air flow in the ventilation duct increases considerably; it is no longer stabilized but in this case, the desired goal is achieved, since the operation of this stabilizer aims to restore very quickly; normal ambient conditions.

Dans la forme d'exécution de ce stabilisateur illi trée par les figures 3 et 4, le paramètre choisi est la pérature.In the embodiment of this stabilizer illustrated in FIGS. 3 and 4, the parameter chosen is the temperature.

Sur ces figures 3 et 4, les organes identiques à c de la forme d'exécution illustrée par les figures 1 et désignés par les mêmes références, et ne sont pas décrii nouveau.In these Figures 3 and 4, the bodies identical to c of the embodiment illustrated in Figures 1 and designated by the same references, and are not described new.

Dans cette seconde forme d'exécution, un tube cylj que 24 est monté pivotant autour de son axe de révolutic un palier ménagé dans le corps 2 de l'appareil, et de me que l'une de ses extrémités soit en saillie dans l'espac nagé entre la chambre 4 et la paroi latérale du canal pi cipal 3, c'est-à-dire dans la zone de plus faible sectie canal principal 3 et de plus grande vitesse de la veine L'autre extrémité de ce tube 24 est prolongée par un ar situé à l'extérieur du corps 2.In this second embodiment, a cylj tube that 24 is pivotally mounted around its axis of revolutic a bearing formed in the body 2 of the device, and me that one of its ends is projecting in the space between the chamber 4 and the lateral wall of the pi cipal canal 3, that is to say in the zone of weaker sectia main channel 3 and higher speed of the vein The other end of this tube 24 is extended by an ar located outside the body 2.

Ce tube 24, qui est fermé à ses deux extrémités p; parois diamétrales, présente, à son extrémité en sailli. le canal principal 3, un orifice radial 26 constituant teur de pression et, au voisinage de son autre extrémit orifice radial 27 communiquant par l'intermédiaire d'un tournant 28 avec la tubulure auxiliaire 9. Des joints a laires 29 assurent l'étanchéité entre le tube 24, le cc de l'appareil et le joint tournant 28. Une bilame 31 es roulée hélicoidalement sur l'arbre 25 prolongeant le tu l'une des extrémités de cette bilame 31 étant fixée au 2 tandis que son autre extrémité est solidaire de l'arbThis tube 24, which is closed at its two ends p; diametrical walls, present, at its projecting end. the main channel 3, a radial orifice 26 constituting the pressure tor and, in the vicinity of its other extremit radial orifice 27 communicating by means of a turn 28 with the auxiliary tubing 9. Air seals 29 seal between the tube 24, the DC of the device and the rotary joint 28. A bimetallic strip 31 is helically rolled on the shaft 25 extending the thou one of the ends of this bimetallic strip 31 being fixed to 2 while its other end is integral arb

Ce stabilisateur de débit régulé en fonction de J pérature est particulièrement destiné à l'évacuation de brûlés de chaudières domestiques à gaz. Lorsque la chau fonctionne, le débit des fumées évacuées doit croître, implique une diminution du volume de la chambre déformable 4 lorsque la température croit.This flow regulator regulated as a function of temperature is particularly intended for the evacuation of burns from domestic gas boilers. When the boiler is operating, the flow rate of the evacuated smoke must increase, implies a reduction in the volume of the deformable chamber 4 when the temperature increases.

Le fonctionnement de ce stabilisateur sensible aux variations de température est donc le suivant :The operation of this stabilizer sensitive to temperature variations is therefore as follows:

Lorsque la température est basse, l'orifice 26 de prise de pression est orienté face au flux d'air circulant dans la canalisation, c'est-à-dire dans le canal principal 3, comme illustré sur la figure 3. Le capteur de pression 26 reçoit donc une pression maximale qu'il transmet à l'intérieur de la chambre 4. Le volume de celle-ci atteint sa valeur maximale possible avec une pression motrice P1 - P2 déterminée. Le débit est stabilisé à une valeur faible lorsque P1 - P2 varie.When the temperature is low, the pressure take-off orifice 26 is oriented facing the air flow circulating in the pipeline, that is to say in the main channel 3, as illustrated in FIG. 3. The sensor pressure 26 therefore receives a maximum pressure which it transmits inside the chamber 4. The volume of the latter reaches its maximum possible value with a determined driving pressure P 1 - P 2 . The flow is stabilized at a low value when P1 - P 2 varies.

Lorsque la température de l'air s'élève, la bilame 31 entraine l'arbre 25 et le tube 24 en rotation, ce qui tend à effacer l'orifice 26 par rapport au flux d'air, de telle sorte que la prise d'air est soumise à une pression moindre. Pour une pression P1 - P2 déterminée, le volume de la chambre 4 diminue et le passage pour les gaz augmente. Le débit traversant le canal principal 3 du stabilisateur se trouve donc stabilisé à une valeur supérieure. A la limite, la veine d'air lèche tangentiellement l'orifice 26, créant ainsi une dépression qui force la vessie 5 à se dégonfler, amplifiant ainsi l'effet de la pression dynamique de la veine d'air sur le capteur 26.When the air temperature rises, the bimetallic strip 31 drives the shaft 25 and the tube 24 in rotation, which tends to clear the orifice 26 relative to the air flow, so that the intake of the air is subjected to less pressure. For a determined pressure P1 - P 2 , the volume of the chamber 4 decreases and the passage for the gases increases. The flow through the main channel 3 of the stabilizer is therefore stabilized at a higher value. At the limit, the air stream tangentially licks the orifice 26, thus creating a depression which forces the bladder 5 to deflate, thus amplifying the effect of the dynamic pressure of the air stream on the sensor 26.

Comme il va de soi, et comme il ressort de ce qui précède, l'invention ne se limite pas aux seules formes d'exécution de ce stabilisateur qui ont été décrites ci-dessus, à titre d'exemple non limitatif ; elle en embrasse au contraire, toutes les variantes de réalisation. C'est ainsi que, par exemple, dans sa forme d'exécution illustrée par les figures 1 et 2, ce stabilisateur pourrait être associé à des moyens sensibles à la température, tandis que, inversement, dans sa forme d'exécution illustrée par les figures 3 et 4, il pourrait être associé à des moyens sensibles à l'humidité relative de l'air.As is obvious, and as appears from the above, the invention is not limited to the sole embodiments of this stabilizer which have been described above, by way of non-limiting example; on the contrary, it embraces all variants of it. Thus, for example, in its embodiment illustrated in FIGS. 1 and 2, this stabilizer could be associated with means sensitive to temperature, while, conversely, in its embodiment illustrated by the Figures 3 and 4, it could be associated with means sensitive to the relative humidity of the air.

Claims (7)

1. - Stabilisateur de débit pour conduit de ventilation, du type comprenant un corps (2) adaptable à ce conduit, ménageant au moins un canal principal (3), une chambre (4) constituée par exemple par une vessie déformable (5) disposée dans ce canal principal (3), un siège (6) supportant cette chambre (4) avec ménagement d'un orifice (7) de faible section permettant à l'air de pénétrer dans la chambre (4) ou d'en sortir et des moyens permettant d'adapter ce siège (6) au corps (2) de l'appareil, les dimensions respectives de la chambre (4) et des sections transversales du canal principal (3) étant telles que, sous l'action des différences de pression existant en amont et en aval, les variations de volume de la chambre (4) qui en résultent modifient la section de passage de l'air dans l'espace ménagé entre les parois de la chambre (4) et celles du canal principal (3), un ressort (8) étant éventuellement associé à la vessie (5) pour rappeler normalement la chambre (4) en position de volume minimal, caractérisé en ce que l'orifice (7) d'entrée et de sortie de la chambre déformable (4) est relié par une tubulure auxiliaire (9) à un capteur de pression associé, d'une part, à des moyens d'amplification de l'effet de la pression dynamique de la veine d'air et, d'autre part, à des moyens sensibles aux variations du paramètre choisi, autre que la pression, et agissant sur les moyens d'amplification ou sur la position du capteur pour modifier l'action de ce dernier sur la chambre déformable.1. - Flow stabilizer for ventilation duct, of the type comprising a body (2) adaptable to this duct, providing at least one main channel (3), a chamber (4) constituted for example by a deformable bladder (5) disposed in this main channel (3), a seat (6) supporting this chamber (4) with an orifice (7) of small section allowing air to enter or exit the chamber (4) means for adapting this seat (6) to the body (2) of the device, the respective dimensions of the chamber (4) and the cross sections of the main channel (3) being such that, under the action of the differences of pressure existing upstream and downstream, the variations in volume of the chamber (4) which result therefrom modify the cross-section of the air passage in the space formed between the walls of the chamber (4) and those of the main channel (3), a spring (8) possibly being associated with the bladder (5) to normally return the chamber (4) to the volume position minimal, characterized in that the orifice (7) of inlet and outlet of the deformable chamber (4) is connected by an auxiliary tube (9) to a pressure sensor associated, on the one hand, with means d amplification of the effect of the dynamic pressure of the air stream and, on the other hand, to means sensitive to variations in the chosen parameter, other than the pressure, and acting on the amplification means or on the position of the sensor to modify the action of the latter on the deformable chamber. 2. - Stabilisateur de débit selon la revendication 1, caractérisé en ce que le corps du dispositif présente un canal auxiliaire (13) en forme de Venturi, constituant les moyens d'amplification de l'effet de la pression dynamique de la veine d'air, dont l'entrée et la sortie sont situées, respectivement,en amont et en aval de la chambre déformable (4), dans le col (13a) duquel débouche, par un orifice (14) constituant le capteur de pression, la tubulure auxiliaire (9), et dans la paroi duquel est ménagé, en aval de l'orifice (14) de la tubulure (9) précitée, une cavité (15) apte à loger un clapet (1G) mobile transversalement au canal auxiliaire (13) ct dont la tige (17) est articulée à un levier (19) amplificateur de mouvements, lui-même accouplé aux moyens sensibles aux variations du paramètre choisi, et associés à des moyens à ressort (24)., de manière à commander le retrait du clapet (16) dans son logement (15) si la valeur du paramètre choisi dépasse un seuil prédéterminé et inversement.2. - flow stabilizer according to claim 1, characterized in that the body of the device has an auxiliary channel (13) in the form of a Venturi, constituting the means for amplifying the effect of the dynamic pressure of the vein of air, the inlet and outlet of which are located, respectively, upstream and downstream of the deformable chamber (4), in the neck (13a) from which opens, through an orifice (14) constituting the pressure sensor, the tubing auxiliary (9), and in the wall of which is formed, downstream of the orifice (14) of the above-mentioned tube (9), a cavity (15) capable of accommodating a valve (1G) movable transversely to the auxiliary channel (13) and whose stem (17) is articulated to a lever (19) motion amplifier, itself coupled to means sensitive to variations in the chosen parameter, and associated with means to spring (24)., so as to control the withdrawal of the valve (16) in its housing (15) if the value of the selected parameter exceeds a predetermined threshold and vice versa. 3. - Stabilisateur de débit selon la revendication 2, caractérisé en ce que, lorsque le paramètre choisi est le taux d'hunidité de l'air, les moyens sensibles aux variations de ce taux sont constitués par la tresse (11a) d'un hygromètre (11), soumis à l'action de l'air circulant dans le conduit, et une biellette (23) articulée sur le levier (19) précité, prend appui, par son extrémité libre (23a) sur la tresse (11a) de l'hygromètre (11), de manière à faire pivoter le levier (19) dans le sens correspondant à la sortie du clapet (16) lorsque la tresse (11a) se tend par suite de la diminution du taux d'humidité.3. - flow stabilizer according to claim 2, characterized in that, when the parameter chosen is the air humidity rate, the means sensitive to variations in this rate consist of the braid (11a) of a hygrometer (11), subjected to the action of air circulating in the duct, and a link (23) articulated on the aforementioned lever (19), bears, by its free end (23a) on the braid (11a) of the hygrometer (11), so as to rotate the lever (19) in the direction corresponding to the outlet of the valve (16) when the braid (11a) tightens as a result of the decrease in the humidity. 4. Stabilisateur selon la revendication 1, caractérisé en ce que le capteur de pression est constitué par un crifice radial (26) ménagé à l'une des extrémités d'un tube cylindrique (24) monté dans le copps (2) du stabilisateur de manière que cette extrémité soit en saillie dans une partie du canal principal (3) située en amont ou au niveau de la chambre déformable (4), et dont la chambre intérieure communique, par une liaison étanche, avec la tubulure auxiliaire (9), les moyens sensibler nux variations dr paramètre choisi étant agencés pour modifier la position dr l'orifice radial précité (26) dans le canal principal en fonction descites variations, et anplifier ainsi l'effet sur lui de la pression dynamique de la veine d'air dirculant dans le canal principal.4. Stabilizer according to claim 1, characterized in that the pressure sensor is constituted by a radial crifice (26) formed at one end of a cylindrical tube (24) mounted in the copps (2) of the stabilizer so that this end protrudes into a part of the main channel (3) located upstream or at the level of the deformable chamber (4), the internal chamber of which communicates, by a sealed connection, with the auxiliary tubing (9), the means sensibler nux variations dr selected parameter being arranged to modify the position dr the above-mentioned radial orifice (26) in the main channel according to these variations, and thus amplify the effect on it of the dynamic pressure of the air stream circulating in the main channel. 5. - Stabilisateur de débit selon la revendication 4, caractérisé en ce que d'une part, l'orifice radial (26) cons- tituant le capteur de pression esi orienté Perpendiculairement au flux d'air et, d'autre part, l'extrémité du tube cylindrique (24) est agencée de manière à pouvoir être déplacée entre une position avancée située en amont de la chambre déformable (4), c'est-à-dire correspondant à une dépression minimale et par conséquent à un volume maximal de la chambre déformable (4) et une valeur faible du débit stabilisé à une position reculée située au niveau de la chambre déformable (4), correspondant à une dépression maximale dans la chambre déformable (4) et, par conséquent à un volume minimal de cette chan- bre et une valeur forte du débit stabilisé.5. - flow stabilizer according to claim 4, characterized in that on the one hand, the radial orifice (26) constituting the pressure sensor esi oriented perpendicular to the air flow and, on the other hand, l end of the cylindrical tube (24) is arranged so that it can be moved between an advanced position located upstream of the deformable chamber (4), that is to say corresponding to a vacuum minimum and therefore at a maximum volume of the deformable chamber (4) and a low value of the stabilized flow at a remote position located at the level of the deformable chamber (4), corresponding to a maximum depression in the deformable chamber (4) and , therefore at a minimum volume of this change and a high value of the stabilized flow. 6. - Stabilisateur de débit selon la revendication 4, caractérisé en ce que le tube cylindrique (24) est monté dans le corps (2) de manière que son extrémité dans laquelle est ménagé l'orifice radial (26) constituant le capteur de pression, soit situé au niveau de la chambre déformable (4) c'est-à-dire dans la zone de plus faible section du canal principal (3) et par conséquent de plus grande vitesse de la veine d'air et de manière à pouvoir pivoter autour de son axe de révolution et son extrémité opposée à celle présentant un orifice radial (26) constituant le capteur de pression est prolongée par un arbre de manoeuvre (25) accouplé aux moyens sensibles aux variations du paramètre choisi et associés à des moyens à ressort de manière à faire pivoter le tube tournant (24) entre une position dans laquelle l'orifice racial précité (26) dans la direction d'où provient la veine d'air qui circule dans le canal principal (3) correspondart à un gonflement maximal de la chambre déformable (4) à une position dans laquelle cet orifice (26) est orienté perpendiculairement au sens d'écoulement de la veine d'air, correspondant à un dégonflement mani- mal de la chambre désonflable (4) lorsque la valeur du paramètre choisi augmente, la liaison étanche entre la chambre intérieure du tube tournant (24) et la tubulure auxiliaire (9) étant assurée par un joint tournant (28).6. - flow stabilizer according to claim 4, characterized in that the cylindrical tube (24) is mounted in the body (2) so that its end in which is formed the radial orifice (26) constituting the pressure sensor , or located at the level of the deformable chamber (4), that is to say in the zone of smaller section of the main channel (3) and consequently of higher speed of the air stream and so as to be able pivot around its axis of revolution and its end opposite to that having a radial orifice (26) constituting the pressure sensor is extended by an operating shaft (25) coupled to the means sensitive to variations in the chosen parameter and associated with means to spring so as to rotate the rotating tube (24) between a position in which the aforementioned racial orifice (26) in the direction from which the air stream flowing in the main channel (3) originates corresponds to swelling maximum of the deformable chamber (4) at a position in which this orifice (26) is oriented perpendicular to the direction of flow of the air stream, corresponding to a manual deflation of the deflation chamber (4) when the value of the selected parameter increases, the tight connection between the inner chamber of the rotating tube (24) and the auxiliary tubing (9) being provided by a rotating joint (28). 7. - Stabilisateur de débit selon la revendiention 6, caractérisé en ce que, lorsque le paramètre choisi est la température, les moyens sensibles à ses variations et les moyens à ressort qui leur sont associés sont constituér par une bila- ne hélicoïdale (31) dont une extrémité est fixée au corps (2) du stabilisateur et dont l'autre extrémité est amarrée à l'arbre (25) prolongeant l'une des extrémités du tube tournant (24).7. - Flow stabilizer according to CLAIMS 6, characterized in that, when the chosen parameter is the temperature, the means sensitive to its variations and the spring means which are associated with them consist of a helical balance (31) one end of which is fixed to the body (2) of the stabilizer and the other end of which is moored to the shaft (25) extending one of the ends of the rotating tube (24).
EP83400104A 1982-02-05 1983-01-17 Volume flow regulator for a ventilating duct Expired EP0087989B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83400104T ATE13222T1 (en) 1982-02-05 1983-01-17 VOLUME FLOW CONTROLLER FOR VENTILATION DUCT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8201903 1982-02-05
FR8201903A FR2521267B1 (en) 1982-02-05 1982-02-05 FLOW STABILIZER FOR VENTILATION DUCT

Publications (2)

Publication Number Publication Date
EP0087989A1 true EP0087989A1 (en) 1983-09-07
EP0087989B1 EP0087989B1 (en) 1985-05-08

Family

ID=9270720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400104A Expired EP0087989B1 (en) 1982-02-05 1983-01-17 Volume flow regulator for a ventilating duct

Country Status (7)

Country Link
US (1) US4515308A (en)
EP (1) EP0087989B1 (en)
AT (1) ATE13222T1 (en)
CA (1) CA1233062A (en)
DE (1) DE3360161D1 (en)
ES (1) ES519200A0 (en)
FR (1) FR2521267B1 (en)

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FR2561355A1 (en) * 1984-03-16 1985-09-20 Rech Ventilation Aerau Et Means for the regulated control of the flow rate of burnt gases in an evacuation duct of one or more boilers
EP2604942A1 (en) * 2011-12-16 2013-06-19 Vti Gas extraction opening with automatic adjustment and method for manufacturing such an opening
FR3007109A1 (en) * 2013-06-13 2014-12-19 Vti GAS EXTRACTION MOUTH AT SIMULTANEOUSLY VARIABLE FLOW IN ACCORDANCE WITH MOISTURE AND PRESSURE

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DK155295C (en) * 1984-07-05 1989-07-24 Rasmussen Kann Ind As AUTOMATIC CONTROLLER TO CONTROL AN AIR INFLATION OPENING IN VARIATION OF VARIOUS HUMIDITY CONDITIONS
US5558162A (en) * 1994-05-05 1996-09-24 Halliburton Company Mechanical lockout for pressure responsive downhole tool
DE19907583A1 (en) * 1999-02-22 2000-08-24 Guethler Renate Drainage system
FR2817327B1 (en) * 2000-11-24 2003-01-17 Anjos DEVICE FOR CONTROLLING THE DEGREE OF OPENING OF AN AIR INPUT, AND AIR INTAKE PROVIDING APPLICATION
US6983889B2 (en) * 2003-03-21 2006-01-10 Home Comfort Zones, Inc. Forced-air zone climate control system for existing residential houses
US9759442B2 (en) 2005-12-27 2017-09-12 American Aldes Ventilation Corporation Method and apparatus for passively controlling airflow
US7766734B2 (en) 2005-12-27 2010-08-03 American Aldes Ventilation Corporation Method and apparatus for passively controlling airflow
DE102017005246A1 (en) * 2017-06-01 2018-12-06 Gert Bartholomäus Supply air element with humid air-controlled regulation of the room air

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DE2251358A1 (en) * 1971-10-20 1973-04-26 Barber Colman Co AIR FLOW REGULATOR
FR2259324A1 (en) * 1974-01-28 1975-08-22 Wehr Corp
DE2513600A1 (en) * 1975-03-27 1976-10-07 Rainer Ing Grad Schwemmle Humidity controlled valves for watering systems - with self adjusting valve controlled by sensor whose length varies with humidity
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Publication number Priority date Publication date Assignee Title
FR2561355A1 (en) * 1984-03-16 1985-09-20 Rech Ventilation Aerau Et Means for the regulated control of the flow rate of burnt gases in an evacuation duct of one or more boilers
EP2604942A1 (en) * 2011-12-16 2013-06-19 Vti Gas extraction opening with automatic adjustment and method for manufacturing such an opening
FR2984465A1 (en) * 2011-12-16 2013-06-21 Vti AUTOMATICALLY ADJUSTING GAS EXTRACTION MOUTH AND METHOD FOR MANUFACTURING SUCH MOUTH
FR3007109A1 (en) * 2013-06-13 2014-12-19 Vti GAS EXTRACTION MOUTH AT SIMULTANEOUSLY VARIABLE FLOW IN ACCORDANCE WITH MOISTURE AND PRESSURE
EP2813774A3 (en) * 2013-06-13 2015-11-04 Vti Gas extraction vent with a rate that is simultaneously variable depending on humidity and pressure

Also Published As

Publication number Publication date
US4515308A (en) 1985-05-07
ATE13222T1 (en) 1985-05-15
ES8400188A1 (en) 1983-10-16
CA1233062A (en) 1988-02-23
DE3360161D1 (en) 1985-06-13
ES519200A0 (en) 1983-10-16
FR2521267B1 (en) 1985-11-22
FR2521267A1 (en) 1983-08-12
EP0087989B1 (en) 1985-05-08

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