EP0427585A1 - Control device and operating cycle for a flow rate regulating system of a ventilation system of a room with controlled atmosphere - Google Patents

Control device and operating cycle for a flow rate regulating system of a ventilation system of a room with controlled atmosphere Download PDF

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Publication number
EP0427585A1
EP0427585A1 EP90402938A EP90402938A EP0427585A1 EP 0427585 A1 EP0427585 A1 EP 0427585A1 EP 90402938 A EP90402938 A EP 90402938A EP 90402938 A EP90402938 A EP 90402938A EP 0427585 A1 EP0427585 A1 EP 0427585A1
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EP
European Patent Office
Prior art keywords
pressure
capsule
period
capsules
probe
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Granted
Application number
EP90402938A
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German (de)
French (fr)
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EP0427585B1 (en
Inventor
Pierre Jardinier
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D'etude Et De Recherche En Ventilation Et Aeraulique Serva Ste
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D'etude Et De Recherche En Ventilation Et Aeraulique Serva Ste
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Priority to AT90402938T priority Critical patent/ATE86378T1/en
Publication of EP0427585A1 publication Critical patent/EP0427585A1/en
Application granted granted Critical
Publication of EP0427585B1 publication Critical patent/EP0427585B1/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
    • F24F11/0001—Control or safety arrangements for ventilation
    • 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

Definitions

  • the present invention relates to a control device for an installation for adjusting the ventilation flow rate of a room with controlled atmosphere, making it possible to modulate the ventilation flow rates, as a function of an electrical signal originating, in particular, from probes evaluating the real needs in each room.
  • the present invention aims to remedy these drawbacks by providing a control device and an operating cycle allowing the ventilation of a room with controlled atmosphere to be regulated at will, while being easy to use and usable in any circumstance.
  • a control device for an installation for regulating the ventilation of a room with controlled atmosphere an installation essentially comprising, at least one probe placed in the room considered for picking up the desired information, such as the temperature, the rate of hygrometry the rate of carbon dioxide or other similar, or the occupation or the vacancy of this room, a valve, of the deformable bladder type, placed in the ventilation duct of the room and controlled by pilot pressure of the valve according to the information received by the probe.
  • This control device comprises, in combination, a pressure divider intended to deliver the pilot pressure of the valve from the different pressures P1 and P2 from two pressure sources to which it is connected, two deformable capsules as a function of the setpoint signals received and acting on a movable element of the pressure divider with inverse effects to vary the pilot pressure according to the above-mentioned setpoints, means of power supply, necessary for the variation of the internal pressure in the capsules, depending on the instructions received, the means associated with the capsules making it possible to overcome the effects of the variation in atmospheric pressure, and a member for controlling the energy supply means able to receive a signal emitted by the probe and to emit, according to a predetermined cycle, consisting of a succession of feeding and relaxation periods of the two capsules, a signal for controlling the pilot pressure P3.
  • the device operates by referring to two pressure sources P1, P2.
  • the pressure divider of this device comprises a body having two inlet ports each of which is connected to one of the aforementioned pressure sources and an outlet port connected to the pilot control port with interposition, between the ports inlet and outlet, of a movable member, such as a core or slide, axially movable, allowing to modify the ratio of the mixture of inlet pressures which determines the outlet pressure or pilot pressure.
  • each deformable capsule is constituted by a body, in the form of a closed envelope, of which a wall part is elastically movable in the direction of the movable member of the pressure divider, in view to move it to the position determined by the setpoint signal received, by this capsule, from the control member.
  • the rigid envelope contains a small volume and its part of elastically mobile wall is constituted by a deformable membrane, attached or not, consuming a low deformation energy.
  • the wall of one of the capsules has a thickness less than that of the other capsule.
  • the two capsules are connected to the outside air by a calibrated passage of the controlled micro-leakage type, in such a way that the quantities of air which can escape during the periods of feeding of the capsules , are negligible.
  • Such a leak makes it possible to balance the internal pressure of the capsule with the ambient pressure in a fairly long time relative to the durations of the different sequences of the control cycle, and in this way to overcome variations in atmospheric pressure.
  • the means for moving the movable wall part of each capsule in the direction of the movable element of the pressure divider are constituted by a heating element, of the resistive type, the temperature of which increases as a function of the applied electric current, which has the effect of increasing the internal pressure of this capsule and of pushing back its mobile wall part.
  • This embodiment of the capsules is advantageous because, in this case, the heating elements can be supplied with a power of 1 Watt, which constitutes a very low energy consumption.
  • control member makes it possible to trigger periods of supply of energy to the capsules, to program a succession of periods of supply of these capsules, to select a supply period of one of the two capsules which must, by its action on the moving element of the pressure divider, determine the opening of the valve according to the signals coming from the probe, collected during the re-cooling period, and to define for this period the power to be supplied to this capsule in function signals from the probe during this relaxation period.
  • this control device makes it possible to modulate the ventilation flows according to the real needs existing in each room.
  • This control member of the energy supply means makes it possible to trigger periods of energy supply to the capsules, the duration of which is limited to the time necessary for the deformations of said capsules to practically reach a state of equilibrium.
  • This control member authorizes, for a given supply phase, the capsule which, by its action on the pressure divider, determines the opening of the valve as a function of the signals coming from the probe during the last phase or phases of relaxation.
  • the detection probe placed in the room is an infrared probe.
  • This probe makes it possible to detect the presence of occupation or vacancy in the room.
  • the means of supplying energy to the two capsules consist of at least one electric battery.
  • These energy supply means of the two capsules have a variable power so as to allow, from a certain threshold, only the displacement of the thinnest wall of these two capsules.
  • this device allows operation of this device allowing it to safely regulate the atmosphere of the room. Indeed, in the case where the power of the supply means no longer allows the heating elements to be fed for only one of the two capsules, these drive the pressure divider in a position such that the connected pressure conduit upper is closed. In this way, the bladder is subjected to the lower pressure and the air flow is maximum.
  • the movable element of the pressure divider is associated with a brake intended to eliminate any parasitic pursuit of its travel.
  • This brake makes it possible in particular to maintain the position of the movable element, by overcoming the inclination of the device and the influence of any source of vibration which may possibly modify the adjustment.
  • the pilot pressure outlet pipe has a conical throttle.
  • a first mode of use of this device its operating cycle, the total duration of which is several minutes, comprises four periods: a first period during which the control unit emits a setpoint signal transmitted to the first capsule, that is to say that intended for returning the movable element of the pressure divider to its original position, such so that the inlet port connected to the upper pressure source communicates with the outlet port providing the pilot pressure of the valve, while the other inlet port is closed, the other capsule receiving no signal, a second period provided for allowing the relaxation of the two capsules, neither receiving a set signal, the movable element of the pressure divider retaining its position, a third period during which each probe transmits an information signal transmitted to the control member and which itself transmits a control signal transmitted to the second capsule, intended for movement, in the opposite direction of the movable member of the pressure divider, on a stroke determined by the information delivered by the detection probe, in order to obtain an appropriate mixture of the two supply pressures of the valve pilot pressure corresponding to the need of the room, the other capsule not receiving any
  • the duration of the fourth period is the most important of the cycle, in order to preserve the low energy consumption as much as possible. It should be noted that the bladder inflated by the pilot pressure remains in the same position throughout this fourth period, which promotes the overall balance of the network, and avoids any pumping phenomenon.
  • its operating cycle comprises the following three periods: a first period during which the control unit emits a setpoint signal transmitted to the capsule intended for the displacement of the movable element of the pressure divider to a determined position, by the control information emitted by each room detection probe , to obtain an outlet pressure appropriate to the ventilation requirement of the room, while the other capsule receives no setpoint signal, a second period provided for the relaxation of the two capsules, neither receiving a set signal, the movable element of the pressure divider retaining its position, and - a third period during which the value of the signal emitted by the detection probe in the room is compared with that of the previous measurement and during which, if the need for ventilation is greater, the control unit emits a setpoint signal transmitted to the capsule intended for movement of the pressure divider so that the inlet port connected to the lower pressure source communicates more widely with the outlet port so as to provide a pilot pressure for the valve closer lower pressure, the bladder being in this way subjected to a press
  • This operating mode eliminates the systematic transition to the lower pressure during the first and second periods of the previous cycle, which makes it possible to increase the stability of the pressures in the ventilation networks and to avoid the presence of a constriction in the duct. the valve pilot pressure output.
  • This mode of regulation is particularly well suited to ventilation, since the concentration of pollutants always evolves at fairly low speeds, an excessively fast control cycle being neither necessary nor desirable for the overall stability of large installations.
  • control element of the heating elements is arranged to carry out comparisons of several signals coming from different probes located in the room, examinations of a priority order, before developing the instruction signal transmitted to the capsules.
  • its operating cycle includes: - a first period which begins, as soon as the probe detects a presence, while the bladder has a maximum volume and the start of ventilation is minimum, by the emission of a setpoint signal C2 from the control member transmitted to the capsule B intended for the displacement in opposite direction of the pressure divider so that the inlet port connected to the pressure source P1 communicates with the outlet port, the other inlet port connected to the pressure P2 being closed, thereby providing a pilot pressure P3 of the bladder, this bladder being in this way subjected to pressure P1 and its minimum volume, which corresponds to an air flow which is maximum, this period continuing by maintaining this state as long as presence detection signals follow one another at intervals of time less than a predetermined duration a second period which begins, as soon as the probe has not detected any presence during the time interval of the aforementioned predetermined duration, while the bladder has a minimum volume and a maximum air flow, by the emission of a reference signal C1 of the control member transmitted to the capsule A connected to the
  • the device in this way operates on an "all or nothing" cycle, which increases its possibilities of use.
  • it is used, according to this embodiment to control the adjustment of the ventilation rate of the room with controlled atmosphere, in the case where the room is occupied by people.
  • FIG. 1 represents a view of a regulation installation using the control device of the invention.
  • a sensor 1 for detecting the need for ventilation is placed in a room 7. Signals 5 emanating from this sensor are routed, by an appropriate means, to the control member 2 which transforms them into instructions C1 and C2; C1 is a reference setpoint, i.e. independent of the ventilation requirement, which allows the control device to be reset, while C2 is a reference value depending on the ventilation requirement of the room to controlled atmosphere, and which allows the chain of command to provide an appropriate response to needs.
  • the control device 3 receives, by known means of signal transmission, the instructions C1 and C2 coming from the control member 2 and, on the other hand, communicates by two conduits with two different pressure sources P1, P2.
  • One of the pressures P2, which constitutes the upper pressure, is that which prevails in the conduit 6 opening into the room 7, while the other P1, which is that which is the ambient pressure, constitutes the lower pressure.
  • P3 a pilot pressure directly injected into the control element 4 which is a valve of the bladder type, the swelling of which is linked to the value of this pilot pressure P3, and which releases a passage more or less large for the air conveyed in the duct 6, opening into the room 7, depending on whether the pilot pressure is higher or lower.
  • the presence of an environment with studied geometry 5 allows to associate known flow rates with the different values of P3.
  • the control device 3 is a means of processing and shaping the control signals, it generates the cycle of alternating deformations in the two capsules A and B.
  • this control device 3 comprises a pressure divider 8 whose body has two inlet ports 8c and 8d, each being connected to one of the aforementioned pressure sources and an outlet port 8f connected to the pilot orifice of valve 4 with interposition, between the inlet orifices 8c and 8d and the outlet orifice 8f, of a axially movable core or slide, of the cylindrical piston 9 type 9.
  • This piston 9 is constituted by two nozzles 9a and 9b secured to a central element 9c of smaller diameter, which makes it possible to modify the mixture ratio of the inlet pressure, ratio which determines the outlet pressure P3 or pilot pressure as a function of the position of its ends relative to the inlet ports of the aforementioned pressures.
  • Two capsules A and B situated on either side of the movable element consisting of a body 10a and 10b in the form of a closed envelope of small volume and of which a wall part 11a, 11b is elastically movable in the direction of the movable element 8 of the pressure divider 9, in order to move it into the position determined by the reference signal C1, C2 received from the control member 2.
  • Each capsule A and B has a calibrated passage 12a, 12b of small section constituting a controlled micro-leakage which is connected to the outside and a heating element of the resistive type 13a, 13b whose temperature increases as a function of the electric current applied, which has the effect of increasing the internal pressure of this and push the part of the movable wall 11a, 11b.
  • a brake 14 is placed on the external part of each end piece 9a, 9b of the movable element 9 so as to avoid any parasitic pursuit of its stroke.
  • the outlet pipe 8f of the pilot pressure P3 has a conical throttle 15 which makes it possible to limit any pumping phenomenon and to limit the time intended for restoring the pilot pressure P3.
  • FIGS. 3 to 10 A first mode of use of this device is illustrated by FIGS. 3 to 10.
  • This first mode of use corresponds to an operating cycle of a total duration of a few minutes and comprising four periods T1, T2, T3, T4.
  • the first, T1 illustrated in Figures 3 and 4 is intended to return the movable member 9 of the pressure divider 8 of the control device 3 to its original position.
  • a setpoint C1 is supplied to the heating element 13a of the capsule A; this setpoint is maintained for a determined time, so that the movable element 9 of the pressure divider 8 is driven in the extreme position by the deformation of the elastic zone 11a, which has the consequence that the inlet port 8d connected to the lower pressure source, i.e. the pressure P1 is closed so that the inlet port 8e connected to the upper pressure source P2 communicates completely with the outlet port 8f of pressure P3 outlet valve 4, the pilot pressure P3 being in this way equal to the pressure P2.
  • the bladder 4 is in this way subjected to the pressure P2 and its volume is maximum, which corresponds to an air flow which is minimum.
  • the other capsule B receiving no signal.
  • the second period T2 illustrated by FIGS. 5 and 6, is intended to allow the deformed zone 11a to return to its initial state, neither of the two capsules receives a reference signal, the movable element 9 of pressure divider 8 retaining its position so that the outlet pressure P3 is always equal to the pressure P2.
  • the third period T3, illustrated by FIGS. 7 and 8, is intended to place the movable element 8 of the pressure divider 9 in a position dependent on the detection signal S emitted by the source 1.
  • the information captured by the probe 1 is transmitted to the control member 2 which sends a control signal or setpoint C2 to the heating element 13b of the second capsule B, intended for the displacement in the opposite direction of the movable member 9 of the pressure divider 8 over a stroke determined by the value of the setpoint C2, by virtue of the displacement of the elastic zone 11b in order to obtain the pilot pressure by the mixture thus obtained of the two supply pressures.
  • the cycle shown makes it possible to associate, with a setpoint value equal to 3/4 of the maximum setpoint, a pilot pressure value P3 equal to 3/4 of the difference in pressures (P1-P2), and, the response is therefore linear over the entire regulation range.
  • Heating of the capsule B can be carried out either for a variable time as a function of the information from the detection probe 1 with constant power, or for a constant time with power variable depending on probe 1 information.
  • the fourth period T4 represented in FIGS. 9 and 10, the duration of which is greater than 50% of the total duration of the cycle, is intended to maintain the movable element 9 of the pressure divider 8 in its position determined by the preceding period of so that the pilot pressure P3 remains equal to 3/4 of (P1-P2), during this period none of the capsules receives a setpoint signal.
  • the second capsule B thus finds the undeformed position, the elastic zone having kept its position, in the same way as the capsule A during the second period. Then there is a return to period T1.
  • its operating cycle can be that illustrated by FIGS. 11 to 15.
  • This cycle has a total duration of several minutes and initially includes three periods T1, T2, T3 followed by a succession of periods T2 and T3.
  • the first period T1 is illustrated in FIGS. 11 and 12.
  • the control member 2 transmits a setpoint C2, corresponding to the signal S emitted by the probe 1, to the heating element 13b of the capsule B, the elastic zone 11b deforms and causes the movable element 9 of the pressure divider 8 to move to a desired position defined by the control parameters, in order to obtain a pilot pressure P3 of the valve 4 suitable for ventilation needs from room 7, the other capsule A receiving no setpoint signal.
  • the second period T2 is illustrated in FIGS. 13 and 14. During this period, no capsule receives a reference signal for a defined time, the movable element 9 of the pressure divider 8 retaining its position. The elastic zone 11b also finds an undistorted position, and the piloting pressure P3 keeps the same value as during the previous period.
  • the value of the signal S of the probe 1 is compared with the value it had during the previous measurement.
  • the control member 2 emits a setpoint signal C2 intended for the displacement of the movable element 9 of the pressure divider 8 as a result of the deformation of the elastic zone 11b of the capsule B, so that the inlet port 8d connected to the lower pressure source P1 communicates more widely with the outlet port 8f thus providing a pilot pressure P3 of the valve 4 closer to the lower pressure P1.
  • the bladder 4 is in this way subjected to a pressure closer to P1 its volume decreases and the air flow increases.
  • the new measurement indicates a lower need for ventilation, as shown in FIGS. 17 and 18, there is an emission by the control member 2 of a setpoint C1 transmitted to the capsule A intended for the movement of the mobile element 9 of the pressure divider 8 in the opposite direction, as a result of the deformation of its elastic zone 11a, so that the inlet orifice 8e connected to the upper pressure probe P2 communicates more widely with the orifice 8f outlet supplying a pilot pressure P3 closer to P2.
  • the bladder 4 is in this way subjected to a pressure closer to P2, its volume increases and the air flow decreases.

Abstract

This device comprises a pressure divider (8) which delivers the control pressure (P3) of a valve positioned in a pipe, starting from different pressures (P1, P2), two deformable capsules (A, B) which, as a function of reference signals received, act on a mobile element (9) of the divider (8) with inverse effects to make the pressure (P3) vary as a function of said references, energy supply means (13a, 13b) which are necessary for the variation of the pressure in the capsule (A, B) as a function of the references received, means (12a, 12b) which make it possible to be free from the variation of atmospheric pressure, and a member for control of the means (13a, 13b) receiving a signal transmitted by a probe and transmitting, according to a cycle consisting of a succession of periods of feed and of relaxation of the capsules (A, B), a signal for control of the pressure (P3). <IMAGE>

Description

La présente invention concerne un dispositif de commande pour installation de réglage du débit de ventilation d'un local à atmosphère contrôlée, permettant de moduler les débits de ventilation, en fonction d'un signal électrique provenant, notamment, de sondes évaluant les besoins réels dans chaque local.The present invention relates to a control device for an installation for adjusting the ventilation flow rate of a room with controlled atmosphere, making it possible to modulate the ventilation flow rates, as a function of an electrical signal originating, in particular, from probes evaluating the real needs in each room.

Il est habituel, pour effectuer ce type de régulation, de faire appel aux techniques utilisant un clapet ou une vanne actionné par un moteur.It is usual, to carry out this type of regulation, to call upon the techniques using a valve or a valve actuated by a motor.

Une telle solution présente l'inconvénient d'être onéreuse et de nécessiter une puissance élevée pour son fonctionnement.Such a solution has the disadvantage of being expensive and of requiring high power for its operation.

Pour remédier à ces inconvénients, on sait aussi utiliser un réseau complémentaire haute pression pour actionner des vannes pneumatiques.To remedy these drawbacks, it is also known to use a complementary high pressure network to actuate pneumatic valves.

Toutefois, de tels dispositifs actuellement utilisés ne permettent pas de se servir de l'énergie de la vanne d'air pour effectuer le régulation du débit.However, such devices currently used do not allow energy from the air valve to be used to regulate the flow rate.

Il en résulte une perte importante d'énergie dans une chaîne complète de régulation qui permet de distribuer correctement l'air là où il est nécessaire.This results in a significant loss of energy in a complete control chain which allows the correct distribution of air where it is needed.

La présente invention vise à remédier à ces inconvénients, en fournissant un dispositif de commande, et un cycle de fonctionnement permettant de réguler, à volonté, la ventilation d'un local à atmosphère contrôlée, tout en étant d'une réalisation facile et utilisable en toute circonstance.The present invention aims to remedy these drawbacks by providing a control device and an operating cycle allowing the ventilation of a room with controlled atmosphere to be regulated at will, while being easy to use and usable in any circumstance.

A cette fin, elle concerne un dispositif de commande pour installation de réglage de ventilation d'un local à atmosphère contrôlée, installation comprenant essentiellement, au moins une sonde placée dans le local considéré pour capter l'information désirée, telle que, la température, le taux d'hygrométrie le taux de dioxyde de carbone ou autres similaires, ou encore l'occupation ou l'inoccupation de ce local, une vanne, du genre vessie déformable, placée dans le conduit de ventilation du local et commandée par pression de pilotage de la vanne en fonction des informations captées par la sonde. Ce dispositif de commande comporte, en combinaison, un diviseur de pression destiné à délivrer le pression de pilotage de la vanne à partir des différentes pressions P1 et P2 de deux sources de pression auxquelles il est raccordé, deux capsules déformables en fonction des signaux de consignes reçus et agissant sur un élément mobile du diviseur de pression avec des effets inverses pour faire varier la pression de pilotage en fonction des consignes précitées, des moyens d'alimentation en énergie, nécessaires à la variation de la pression interne dans les capsules, en fonction des consignes reçues, des moyens associés aux capsules permettant de s'affranchir des effets de la variation de la pression atmosphérique, et un organe de commande des moyens d'alimentation en énergie aptes à recevoir un signal émis par la sonde et à émettre, suivant un cycle prédéterminé, constitué d'une succession de périodes d'alimentation et de relaxaton des deux capsules, un signal de commande de la pression de pilotage P3.To this end, it relates to a control device for an installation for regulating the ventilation of a room with controlled atmosphere, an installation essentially comprising, at least one probe placed in the room considered for picking up the desired information, such as the temperature, the rate of hygrometry the rate of carbon dioxide or other similar, or the occupation or the vacancy of this room, a valve, of the deformable bladder type, placed in the ventilation duct of the room and controlled by pilot pressure of the valve according to the information received by the probe. This control device comprises, in combination, a pressure divider intended to deliver the pilot pressure of the valve from the different pressures P1 and P2 from two pressure sources to which it is connected, two deformable capsules as a function of the setpoint signals received and acting on a movable element of the pressure divider with inverse effects to vary the pilot pressure according to the above-mentioned setpoints, means of power supply, necessary for the variation of the internal pressure in the capsules, depending on the instructions received, the means associated with the capsules making it possible to overcome the effects of the variation in atmospheric pressure, and a member for controlling the energy supply means able to receive a signal emitted by the probe and to emit, according to a predetermined cycle, consisting of a succession of feeding and relaxation periods of the two capsules, a signal for controlling the pilot pressure P3.

Selon une forme de réalisation de l'invention, le dispositif fonc­tionne en se référant à deux sources de pression P1,P2. L'une P2, qui est celle qui règne dans le conduit débouchant dans le local, constitue la pression supérieure, tandis que l'autre P1, qui est la pression ambiante, constitue la pression inférieure.According to one embodiment of the invention, the device operates by referring to two pressure sources P1, P2. One P2, which is the one which prevails in the conduit opening into the room, constitutes the upper pressure, while the other P1, which is the ambient pressure, constitutes the lower pressure.

Le diviseur de pression de ce dispositif comprend un corps présentant deux orifices d'entrée dont chacun est relié à l'une des sources de pression précitées et un orifice de sortie relié à l'orifice de pilotage de la vanne avec interposition, entre les orifices d'entrée et l'orifice de sortie, d'un organe mobile, tel qu'un noyau ou tiroir, mobile axialement, permettant de modifier le rapport du mélange des pressions d'entrée qui détermine la pression de sortie ou pression de pilotage.The pressure divider of this device comprises a body having two inlet ports each of which is connected to one of the aforementioned pressure sources and an outlet port connected to the pilot control port with interposition, between the ports inlet and outlet, of a movable member, such as a core or slide, axially movable, allowing to modify the ratio of the mixture of inlet pressures which determines the outlet pressure or pilot pressure.

Conformément à une forme préférée de réalisation de l'invention, chaque capsule déformable est constituée par un corps, en forme d'enve­loppe fermée, dont une partie de paroi est élastiquement mobile en direction de l'organe mobile du diviseur de pression, en vue de la déplacer dans la position déterminée par le signal de consigne reçu, par cette capsule, de l'organe de commande.In accordance with a preferred embodiment of the invention, each deformable capsule is constituted by a body, in the form of a closed envelope, of which a wall part is elastically movable in the direction of the movable member of the pressure divider, in view to move it to the position determined by the setpoint signal received, by this capsule, from the control member.

Avantageusement, l'enveloppe rigide renferme un faible volume et sa partie de paroi élastiquement mobile est constituée par une membrane déformable, rapportée ou non, consommant une faible énergie de défor­mation.Advantageously, the rigid envelope contains a small volume and its part of elastically mobile wall is constituted by a deformable membrane, attached or not, consuming a low deformation energy.

Selon une caractéristique intéressante de l'invention, la paroi de l'une des capsules a une épaisseur inférieure à celle de l'autre capsule.According to an advantageous characteristic of the invention, the wall of one of the capsules has a thickness less than that of the other capsule.

Cela permet d'obtenir un fonctionnement qui nécessite une con­sommation minime en énergie.This provides an operation that requires minimal energy consumption.

Selon une autre caractéristique de l'invention, les deux capsules sont reliées à l'air extérieur par un passage calibré du type microfuite contrôlée, de telle manière que les quantités d'air qui peuvent s'échapper pendant les périodes d'alimentation des capsules, sont négligeables.According to another characteristic of the invention, the two capsules are connected to the outside air by a calibrated passage of the controlled micro-leakage type, in such a way that the quantities of air which can escape during the periods of feeding of the capsules , are negligible.

Une telle fuite permet d'équilibrer la pression interne de la capsule avec la pression ambiante en un temps assez long par rapport aux durées des différentes séquences du cycle de commande, et de cette façon de s'affranchir des variations de la pression atmosphérique.Such a leak makes it possible to balance the internal pressure of the capsule with the ambient pressure in a fairly long time relative to the durations of the different sequences of the control cycle, and in this way to overcome variations in atmospheric pressure.

En effet, les variations barométriques naturelles sont toujours lentes et l'équilibre peut ainsi se faire par l'intermédiaire de la fuite, ce qui autorise un fonctionnement correct de l'appareil de commande, quelles que soient les conditions métérologiques et les altitudes d'utilisation.In fact, natural barometric variations are always slow and equilibrium can thus be achieved by means of the leak, which allows correct operation of the control device, whatever the meteorological conditions and the altitudes of use.

Selon une autre caractéristique de l'invention, les moyens de déplacement de la partie de paroi mobile de chaque capsule en direction de l'élément mobile du diviseur de pression sont constitués par un élément chauffant, de type résistif, dont la température augmente en fonction du courant électrique appliqué, ce qui a pour effet d'augmenter la pression interne de cette capsule et de repousser sa partie de paroi mobile.According to another characteristic of the invention, the means for moving the movable wall part of each capsule in the direction of the movable element of the pressure divider are constituted by a heating element, of the resistive type, the temperature of which increases as a function of the applied electric current, which has the effect of increasing the internal pressure of this capsule and of pushing back its mobile wall part.

Cette forme d'exécution des capsules est avantageuse car, dans ce cas, les éléments chauffants peuvent être alimentés par une puissance de 1 Watt, ce qui constitue une très faible consommation d'énergie.This embodiment of the capsules is advantageous because, in this case, the heating elements can be supplied with a power of 1 Watt, which constitutes a very low energy consumption.

Avantageusement, l'organe de commande permet de déclencher des périodes d'alimentation en énergie des capsules, de programmer une succession de périodes d'alimentation de ces capsules, de sélectionner une période d'alimentation d'une des deux capsules qui doit, par son action sur l'élément mobile du diviseur de pression, déterminer l'ouverture de la vanne en fonction des signaux provenant de la sonde, recueillis pendant la période de ralaxation, et de définir pour cette période la puissance à fournir à cette capsule en fonction des signaux provenant de la sonde pendant cette période de relaxation.Advantageously, the control member makes it possible to trigger periods of supply of energy to the capsules, to program a succession of periods of supply of these capsules, to select a supply period of one of the two capsules which must, by its action on the moving element of the pressure divider, determine the opening of the valve according to the signals coming from the probe, collected during the re-cooling period, and to define for this period the power to be supplied to this capsule in function signals from the probe during this relaxation period.

De cette façon, ce dispositif de commande permet de moduler les débits de ventilation en fonction des besoins réels existant dans chaque local.In this way, this control device makes it possible to modulate the ventilation flows according to the real needs existing in each room.

Cet organe de commande des moyens d'alimentation en énergie permet de déclencher des périodes d'alimentation en énergie des capsules dont la durée est limitée au temps nécessaire pour que les déformations desdites capsules atteignent pratiquement un état d'équilibre.This control member of the energy supply means makes it possible to trigger periods of energy supply to the capsules, the duration of which is limited to the time necessary for the deformations of said capsules to practically reach a state of equilibrium.

De plus, il permet la programmation d'une succession de ces phases d'alimentation en les séparant par des phases, généralement plus longues, de relaxation des capsules dont les durées peuvent être fixes ou dépendantes des variations des informations recueillies par la sonde.In addition, it allows the programming of a succession of these feeding phases by separating them by phases, generally longer, of relaxation of the capsules, the durations of which may be fixed or dependent on variations in the information collected by the probe.

Cet organe de commande autorise, pour une phase d'alimentation donnée, la capsule qui doit, par son action sur le diviseur de pression, déterminer l'ouverture de la vanne en fonction des signaux provenant de la sonde pendant la ou les dernières phases de relaxation.This control member authorizes, for a given supply phase, the capsule which, by its action on the pressure divider, determines the opening of the valve as a function of the signals coming from the probe during the last phase or phases of relaxation.

Enfin, il détermine, pour une phase d'alimentation déterminée, la puissance à fournir à la capsule correspondante, en fonction des signaux provenant de la sonde, pendant la ou les dernières phases de relaxation.Finally, it determines, for a given supply phase, the power to be supplied to the corresponding capsule, as a function of the signals coming from the probe, during the last phase or phases of relaxation.

Selon une forme de réalisation de l'invention, la sonde de détec­tion placée dans le local est une sonde à infrarouge.According to one embodiment of the invention, the detection probe placed in the room is an infrared probe.

Cette sonde permet de détecter la présence de l'occupation ou de l'inoccupation dans le local.This probe makes it possible to detect the presence of occupation or vacancy in the room.

Avantageusement, les moyens d'alimentation en énergie des deux capsules sont constitués par au moins une pile électrique.Advantageously, the means of supplying energy to the two capsules consist of at least one electric battery.

Ces moyens d'alimentation en énergie des deux capsules ont une puissance variable de manière à permettre, à partir d'un certain seuil, uniquement le déplacement de la paroi la plus fine de ces deux capsules.These energy supply means of the two capsules have a variable power so as to allow, from a certain threshold, only the displacement of the thinnest wall of these two capsules.

Cela autorise un fonctionnement de ce dispositif lui permettant en toute sécurité de réguler l'atmosphère du local. En effet, dans le cas où la puissance des moyens d'alimentation ne permet plus l'alimentation des éléments chauffants que pour une seule des deux capsules, ceux-ci entraînent le diviseur de pression en une position telle que le conduit relié de la pression supérieure est obturé. De cette façon, la vessie est soumise à la pression inférieure et le débit en air est maximum.This allows operation of this device allowing it to safely regulate the atmosphere of the room. Indeed, in the case where the power of the supply means no longer allows the heating elements to be fed for only one of the two capsules, these drive the pressure divider in a position such that the connected pressure conduit upper is closed. In this way, the bladder is subjected to the lower pressure and the air flow is maximum.

Avantageusement, à l'élément mobile du diviseur de pression est associé un frein destiné à éliminer toute poursuite parasitaire de sa course.Advantageously, the movable element of the pressure divider is associated with a brake intended to eliminate any parasitic pursuit of its travel.

Ce frein permet notamment de maintenir la position de l'élément mobile, en s'affranchissant de l'inclinaison du dispositif et de l'influence de toute source de vibration pouvant éventuellement modifier le règlage.This brake makes it possible in particular to maintain the position of the movable element, by overcoming the inclination of the device and the influence of any source of vibration which may possibly modify the adjustment.

Selon une autre caractéristique intéressante de l'invention, le conduit de sortie de la pression de pilotage comporte un étranglement de forme conique.According to another advantageous characteristic of the invention, the pilot pressure outlet pipe has a conical throttle.

Cet étranglement permet de limiter tout phénomène de pompage et de cette manière d'améliorer la qualité de la régulation.This constriction makes it possible to limit any pumping phenomenon and in this way to improve the quality of the regulation.

Selon un premier mode d'utilisation de ce dispositif, son cycle de fonctionnement, dont la durée totale est de plusieurs minutes, comprend quatre périodes :
- une première période durant laquelle l'organe de commande émet un signal de consigne transmis à la première capsule, c'est à dire à celle destinée à la remise en position d'origine de l'élément mobile du diviseur de pression, de telle sorte que l'orifice d'entrée relié à la source de pression supérieure communique avec l'orifice de sortie fournissant la pression de pilotage de la vanne, tandis que l'autre orifice d'entrée est obturé, l'autre capsule ne recevant aucun signal,
- une deuxième période prévue pour permettre la relaxation des deux capsules, aucune ne recevant un signal de consigne, l'élément mobile du diviseur de pression conservant sa position,
- une troisième période durant laquelle chaque sonde émet un signal d'information transmis à l'organe de commande et qui émet lui-même un signal de commande transmis à la seconde capsule, destinée au dépla­cement, en sens inverse de l'organe mobile du diviseur de pression, sur une course déterminée par les informations délivrées par la sonde de détection, en vue d'obtenir un mélange approprié des deux pressions d'alimentation de la pression de pilotage de la vanne correspondant au besoin du local, l'autre capsule ne recevant aucun signal,
- une quatrième période, dont la durée est supérieure à 50 % de la durée du cycle complet, est prévue pour permettre la relaxation des deux capsules, aucune ne recevant de signal de consigne, de sorte que l'élément mobile du diviseur de pression garde la même position que lors de la précédente période, et la cycle recommence.According to a first mode of use of this device, its operating cycle, the total duration of which is several minutes, comprises four periods:
a first period during which the control unit emits a setpoint signal transmitted to the first capsule, that is to say that intended for returning the movable element of the pressure divider to its original position, such so that the inlet port connected to the upper pressure source communicates with the outlet port providing the pilot pressure of the valve, while the other inlet port is closed, the other capsule receiving no signal,
a second period provided for allowing the relaxation of the two capsules, neither receiving a set signal, the movable element of the pressure divider retaining its position,
a third period during which each probe transmits an information signal transmitted to the control member and which itself transmits a control signal transmitted to the second capsule, intended for movement, in the opposite direction of the movable member of the pressure divider, on a stroke determined by the information delivered by the detection probe, in order to obtain an appropriate mixture of the two supply pressures of the valve pilot pressure corresponding to the need of the room, the other capsule not receiving any signal,
- a fourth period, the duration of which is greater than 50% of the duration of the complete cycle, is provided to allow the relaxation of the two capsules, neither receiving a set signal, so that the movable element of the pressure divider keeps the same position as in the previous period, and the cycle begins again.

Avantageusement, la durée de la quatrième période est la plus importante du cycle, afin de préserver au maximum la faible utilisaton d'énergie. Il faut noter que la vessie gonflée par la pression de pilotage reste dans la même position durant toute cette quatrième période, ce qui favorise l'équilibre global du réseau, et évite tout phénomène de pompage.Advantageously, the duration of the fourth period is the most important of the cycle, in order to preserve the low energy consumption as much as possible. It should be noted that the bladder inflated by the pilot pressure remains in the same position throughout this fourth period, which promotes the overall balance of the network, and avoids any pumping phenomenon.

Selon une variante du mode d'utilisation de ce dispositif, son cycle de fonctionnement comprend les trois périodes suivantes :
- une première période durant laquelle l'organe de commande émet un signal de consigne transmis à la capsule destinée au déplacement de l'élément mobile du diviseur de pression à une position déterminée, par les informations de commande émises par chaque sonde de détection du local, pour obtenir une pression de sortie de la vanne appropriée au besoin en ventilation du local, tandis que l'autre capsule ne reçoit aucun signal de consigne,
- une deuxième période prévue pour la relaxation des deux capsules, aucune ne recevant de signal de consigne, l'élément mobile du diviseur de pression conservant sa position, et
- une troisième période durant laquelle la valeur du signal émis par la sonde de détection dans le local est comparée à celle de la précédente mesure et durant laquelle, si le besoin de ventilation est plus important, l'organe de commande émet un signal de consigne transmis à la capsule destinée au déplacement du diviseur de pression de telle sorte que l'orifice d'entrée relié à la source de pression inférieure communique plus largement avec l'orifice de sortie de manière à fournir une pression de pilotage de la vanne plus proche de la pression inférieure, la vessie étant de cette façon soumise à une presson plus proche de P1 de telle façon que son volume diminue et que le débit d'air augmente, et si, au contraire, le besoin en ventilation détecté par chaque sonde de local est plus faible, l'organe de commande émet un signal de consigne transmis à l'autre capsule de telle sorte que l'élément mobile du diviseur de pression, déplacé en sens inverse à l'orifice d'entrée relié à la source de pression supérieure, communique plus largement avec l'orifice de sortie de manière à fournir une pression de pilotage de la vanne plus proche de la pression supérieure, la vessie étant de cette façon soumise à une pression plus proche de P2 de telle façon que son volume augmente et que le débit d'air diminue.According to a variant of the mode of use of this device, its operating cycle comprises the following three periods:
a first period during which the control unit emits a setpoint signal transmitted to the capsule intended for the displacement of the movable element of the pressure divider to a determined position, by the control information emitted by each room detection probe , to obtain an outlet pressure appropriate to the ventilation requirement of the room, while the other capsule receives no setpoint signal,
a second period provided for the relaxation of the two capsules, neither receiving a set signal, the movable element of the pressure divider retaining its position, and
- a third period during which the value of the signal emitted by the detection probe in the room is compared with that of the previous measurement and during which, if the need for ventilation is greater, the control unit emits a setpoint signal transmitted to the capsule intended for movement of the pressure divider so that the inlet port connected to the lower pressure source communicates more widely with the outlet port so as to provide a pilot pressure for the valve closer lower pressure, the bladder being in this way subjected to a presson closer to P1 so that its volume decreases and the air flow increases, and if, on the contrary, the need for ventilation detected by each probe of local is weaker, the control unit emits a setpoint signal transmitted to the other capsule so that the movable element of the pressure divider, moved in the opposite direction to the gold inlet inlet connected to the upper pressure source, communicates more widely with the outlet orifice so as to provide a pilot pressure of the valve closer to the upper pressure, the bladder being in this way subjected to more pressure close to P2 so that its volume increases and the air flow decreases.

Ce mode de fonctionnement supprime le passage systématique à la pression inférieure lors des premières et deuxièmes périodes du cycle précédent, ce qui permet d'augmenter la stabilité des pressions dans les réseaux de ventilation et d'éviter la présence d'un étranglement dans le conduit de sortie de la pression de pilotage de la vanne.This operating mode eliminates the systematic transition to the lower pressure during the first and second periods of the previous cycle, which makes it possible to increase the stability of the pressures in the ventilation networks and to avoid the presence of a constriction in the duct. the valve pilot pressure output.

Ce mode de régulation est particulièrement bien adapté à la ventilation, puisque la concentration en polluants évolue toujours à des vitesses assez faibles, un cycle de commande trop rapide n'étant ni nécessaire, ni souhaitable pour la stabilité globale de grosses installations.This mode of regulation is particularly well suited to ventilation, since the concentration of pollutants always evolves at fairly low speeds, an excessively fast control cycle being neither necessary nor desirable for the overall stability of large installations.

Avantageusement, l'organe de commande des éléments chauffants est agencé pour effectuer des comparaisons de plusieurs signaux provenant de différentes sondes situées dans le local, des examens d'ordre prioritaire, avant d'élaborer le signal de consignes transmis aux capsules.Advantageously, the control element of the heating elements is arranged to carry out comparisons of several signals coming from different probes located in the room, examinations of a priority order, before developing the instruction signal transmitted to the capsules.

Selon une autre variante du mode de réalisation de ce dispositif, son cycle de fonctionnement comprend :
- une première période qui commence, dès lors que la sonde détecte une présence, alors que la vessie a un volume maximum et que le début de ventilation est minimum, par l'émission d'un signal de consigne C2 de l'organe de commande transmis à la capsule B destinée au déplacement en sens inverse du diviseur de pression de telle sorte que l'orifice d'entrée relié à la source de pression P1 communique avec l'orifice de sortie, l'autre orifice d'entrée relié à la pression P2 étant obturé, en fournissant ainsi une pression de pilotage P3 de la vessie, cette vessie étant de cette façon soumise à la pression P1 et son volume minimum, ce qui correspond à un débit en air qui est maximum, cette période se poursuivant en maintenant cet état tant que des signaux de détection de présence se succèdent à des intervalles de temps inférieurs à une durée pré-déterminée
- une seconde période qui commence, dès lors que la sonde n'a pas détecté de présence pendant l'intervalle de temps de durée pré-déterminée précitée, alors que la vessie a un volume minimum et un débit en air maximum, par l'émission d'un signal de consigne C1 de l'organe de com­mande transmis à la capsule A relié à la source de pression P1 de telle sorte que l'orifice d'entrée relié à la source de pression P2 communique avec l'orifice de sortie, tandis que l'orifice relié à la pression P1 est obturé, en fournissant de cette façon une pression de pilotage P3 de la vessie, cette vessie étant alors soumise à la pression P2, son volume étant maximum et le débit en air minimum, cette période se poursuivant en maintenant cet état, tant qu'une présence n'est pas détectée.According to another variant of the embodiment of this device, its operating cycle includes:
- a first period which begins, as soon as the probe detects a presence, while the bladder has a maximum volume and the start of ventilation is minimum, by the emission of a setpoint signal C2 from the control member transmitted to the capsule B intended for the displacement in opposite direction of the pressure divider so that the inlet port connected to the pressure source P1 communicates with the outlet port, the other inlet port connected to the pressure P2 being closed, thereby providing a pilot pressure P3 of the bladder, this bladder being in this way subjected to pressure P1 and its minimum volume, which corresponds to an air flow which is maximum, this period continuing by maintaining this state as long as presence detection signals follow one another at intervals of time less than a predetermined duration
a second period which begins, as soon as the probe has not detected any presence during the time interval of the aforementioned predetermined duration, while the bladder has a minimum volume and a maximum air flow, by the emission of a reference signal C1 of the control member transmitted to the capsule A connected to the pressure source P1 so that the inlet orifice connected to the pressure source P2 communicates with the outlet orifice , while the orifice connected to the pressure P1 is closed, thereby supplying a pilot pressure P3 of the bladder, this bladder then being subjected to the pressure P2, its volume being maximum and the air flow minimum, this period continuing while maintaining this state, as long as a presence is not detected.

Le dispositif de cette manière fonctionne suivant un cycle du "tout ou rien", ce qui augment ses possibilités d'utilisation. En outre, il est utilisé, suivant ce mode de réalisation pour commander le réglage du débit de la ventilation du local à atmosphère contrôlée, dans le cas où le local est occupé par des personnes.The device in this way operates on an "all or nothing" cycle, which increases its possibilities of use. In addition, it is used, according to this embodiment to control the adjustment of the ventilation rate of the room with controlled atmosphere, in the case where the room is occupied by people.

Cela permet à l'élément mobile du diviseur de pression de n'occuper que deux positions correspondant respectivement à un débit maximum et minimum de l'air.This allows the movable element of the pressure divider to occupy only two positions corresponding respectively to a maximum and minimum air flow.

De cette manière, cela diminue la consommation importante d'énergie, en autorisant, suivant l'occupation du local par une personne, à l'élément mobile du diviseur de pression de rester dans une même position.In this way, this reduces the significant energy consumption, by allowing, depending on the occupancy of the room by a person, the movable element of the pressure divider to remain in the same position.

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'exemples non limitatifs, une forme de réalisation de ce dispositif et en illustrant deux modes de fonctionnement :

  • Figure 1 en est vue d'une installation de régulation utilisant le dispositif de l'invention ;
  • Figure 2 en est une vue en coupe du dispositif de commande ;
  • Figures 3 à 10 en sont des vues illustrant différentes étapes de son cycle de fonctionnement, suivant un premier mode d'utilisation ;
  • Figures 11 à 18 en sont des vues similaires aux figures 3 à 10 illustrant différentes étapes de son cycle de fonctionnement, suivant un second mode d'utilisation.
In any case, the invention will be well understood using the description which follows, with reference to the appended diagrammatic drawing representing, by way of nonlimiting examples, an embodiment of this device and illustrating two modes of operation:
  • Figure 1 is a view of a regulation installation using the device of the invention;
  • Figure 2 is a sectional view of the control device;
  • Figures 3 to 10 are views illustrating different stages of its operating cycle, according to a first mode of use;
  • Figures 11 to 18 are views similar to Figures 3 to 10 illustrating different stages of its operating cycle, according to a second mode of use.

La figure 1 représente une vue d'une installation de régulation utilisant le dispositif de commande de l'invention.FIG. 1 represents a view of a regulation installation using the control device of the invention.

Une sonde 1 de détection du besoin de ventilation est placée dans une pièce 7. Des signaux 5 émanant de cette sonde sont acheminés, par un moyen approprié, vers l'organe de commande 2 qui les transforme en consignes C1 et C2 ; C1 est une valeur de consigne de référence, c'est à dire indépendante du besoin en ventilation, ce qui permet la remise à l'origine du dispositif de commande, tandis que C2 est une valeur de consigne dépendant du besoin de ventilation du local à atmosphère con­trôlée, et qui permet à la chaîne de commande de fournir une réponse appropriée aux besoins.A sensor 1 for detecting the need for ventilation is placed in a room 7. Signals 5 emanating from this sensor are routed, by an appropriate means, to the control member 2 which transforms them into instructions C1 and C2; C1 is a reference setpoint, i.e. independent of the ventilation requirement, which allows the control device to be reset, while C2 is a reference value depending on the ventilation requirement of the room to controlled atmosphere, and which allows the chain of command to provide an appropriate response to needs.

L'air circule du conduit 6 vers le local à ventiler, comme représenté par des flêches sur cette figure.Air flows from duct 6 to the room to be ventilated, as shown by arrows in this figure.

Le dispositif de commande 3 d'une part reçoit, par des moyens connus de transmission de signaux, les consignes C1 et C2 provenant de l'organe de commande 2 et, d'autre part, communique par deux conduits avec deux sources de pression différentes P1,P2. L'une des pressions P2, qui constitue la pression supérieure, est celle qui règne dans le conduit 6 débouchant dans le local 7, tandis que l'autre P1, qui est celle qui est la pression ambiante, constitue la pression inférieure. A partir de ces informa­tions, il élabore une pression de pilotage P3 directement injectée dans l'élément de commande 4 qui est une vanne du genre vessie, dont le gonflement est lié à la valeur de cette pression de pilotage P3, et qui libère un passage plus ou moins grand pour l'air véhiculé dans le conduit 6, débouchant dans le local 7, selon que la pression de pilotage est plus ou moins élevée. La présence d'un environnement à géométrie étudiée 5 permet d'associer des débits connus aux différentes valeurs de P3.The control device 3 on the one hand receives, by known means of signal transmission, the instructions C1 and C2 coming from the control member 2 and, on the other hand, communicates by two conduits with two different pressure sources P1, P2. One of the pressures P2, which constitutes the upper pressure, is that which prevails in the conduit 6 opening into the room 7, while the other P1, which is that which is the ambient pressure, constitutes the lower pressure. From this information, it develops a pilot pressure P3 directly injected into the control element 4 which is a valve of the bladder type, the swelling of which is linked to the value of this pilot pressure P3, and which releases a passage more or less large for the air conveyed in the duct 6, opening into the room 7, depending on whether the pilot pressure is higher or lower. The presence of an environment with studied geometry 5 allows to associate known flow rates with the different values of P3.

Le dispositif de commande 3, dont une vue en coupe est repré­sentée à la figure 2, est un moyen de traitement et de mise en forme des signaux de commande, il engendre le cycle de déformations alternées dans les deux capsules A et B.The control device 3, a sectional view of which is shown in FIG. 2, is a means of processing and shaping the control signals, it generates the cycle of alternating deformations in the two capsules A and B.

Comme le montre la figure 2, ce dispositif de commande 3 comprend un diviseur de pression 8 dont le corps présente deux orifices d'entrée 8c et 8d, chacun étant relilé à l'une des sources de pression précitées et un orifice de sortie 8f relié à l'orifice de pilotage de la vanne 4 avec interposition, entre les orifices d'entrée 8c et 8d et l'orifice de sortie 8f, d'un noyau ou tiroir mobile axialement, du type piston 9 cylindrique 9. Ce piston 9 est constitué par deux embouts 9a et 9b solidaires d'un élément central 9c de diamètre inférieur, ce qui permet de modifier le rapport du mélange de la pression d'entrée, rapport qui détermine la pression de sortie P3 ou pression de pilotage en fonction de la position de ses extrémités par rapport aux orifices d'entrée des pressions précitées.As shown in Figure 2, this control device 3 comprises a pressure divider 8 whose body has two inlet ports 8c and 8d, each being connected to one of the aforementioned pressure sources and an outlet port 8f connected to the pilot orifice of valve 4 with interposition, between the inlet orifices 8c and 8d and the outlet orifice 8f, of a axially movable core or slide, of the cylindrical piston 9 type 9. This piston 9 is constituted by two nozzles 9a and 9b secured to a central element 9c of smaller diameter, which makes it possible to modify the mixture ratio of the inlet pressure, ratio which determines the outlet pressure P3 or pilot pressure as a function of the position of its ends relative to the inlet ports of the aforementioned pressures.

Deux capsules A et B situées de part et d'autre de l'élément mobile, chacune d'elles étant constituée par un corps 10a et 10b en forme d'enveloppe fermée de faible volume et dont une partie de paroi 11a, 11b est élastiquement mobile en direction de l'élément mobile 8 du diviseur de pression 9, en vue de la déplacer dans la position déterminée par le signal de consigne C1, C2 reçu du l'organe de commande 2. Chaque capsule A et B comporte un passage calibré 12a, 12b de faible section constituant une microfuite contrôlée qui est reliée à l'extérieur et un élément chauffant du type résistif 13a, 13b dont la température augmente en fonction du courant électrique appliqué, ce qui a pour effet d'augmenter la pression interne de celle-ci et de repousser la partie de la paroi mobile 11a, 11b. Un frein 14 est placé sur la partie externe de chaque embout 9a, 9b de l'élément mobile 9 de manière à éviter toute poursuite parasitaire de sa course.Two capsules A and B situated on either side of the movable element, each of them consisting of a body 10a and 10b in the form of a closed envelope of small volume and of which a wall part 11a, 11b is elastically movable in the direction of the movable element 8 of the pressure divider 9, in order to move it into the position determined by the reference signal C1, C2 received from the control member 2. Each capsule A and B has a calibrated passage 12a, 12b of small section constituting a controlled micro-leakage which is connected to the outside and a heating element of the resistive type 13a, 13b whose temperature increases as a function of the electric current applied, which has the effect of increasing the internal pressure of this and push the part of the movable wall 11a, 11b. A brake 14 is placed on the external part of each end piece 9a, 9b of the movable element 9 so as to avoid any parasitic pursuit of its stroke.

Le conduit de sortie 8f de la pression de pilotage P3 comporte un étranglement de forme conique 15 qui permet de limiter tout phénomène de pompage et de limiter le temps destiné au rétablissement de la pression de pilotage P3.The outlet pipe 8f of the pilot pressure P3 has a conical throttle 15 which makes it possible to limit any pumping phenomenon and to limit the time intended for restoring the pilot pressure P3.

Un premier mode d'utilisation de ce dispositif est illustré par les figures 3 à 10.A first mode of use of this device is illustrated by FIGS. 3 to 10.

A ce premier mode d'utilisation correspond un cycle de fonction­nement d'une durée totale de quelques minutes et comprenant quatre périodes T1, T2, T3, T4.This first mode of use corresponds to an operating cycle of a total duration of a few minutes and comprising four periods T1, T2, T3, T4.

La première, T1, illustrée par les figures 3 et 4, est destinée à remettre l'élément mobile 9 du diviseur de pression 8 du dispositif de commande 3 dans sa position d'origine. Une consigne C1, est fournie à l'élément chauffant 13a de la capsule A ; cette consigne est maintenue pendant un temps déterminé, de telle sorte que l'élément mobile 9 du diviseur de pression 8 est entraîné en position extrême par la déformation de la zone élastique 11a, ce qui a pour conséquence que l'orifice d'entrée 8d relié à la source de pression inférieur c'est à dire de la pression P1 se trouve obturé de manière à ce que l'orifice d'entrée 8e relié à la source de pression supérieure P2 communique totalement avec l'orifice de sortie 8f de pression de sortie P3 de la vanne 4, la pression de pilotage P3 étant de cette façon égale à la pression P2. La vessie 4 est de cette façon soumise à la pression P2 et son volume est maximum, ce qui correspond à un débit d'air qui est minimum. L'autre capsule B ne recevant aucun signal.The first, T1, illustrated in Figures 3 and 4, is intended to return the movable member 9 of the pressure divider 8 of the control device 3 to its original position. A setpoint C1, is supplied to the heating element 13a of the capsule A; this setpoint is maintained for a determined time, so that the movable element 9 of the pressure divider 8 is driven in the extreme position by the deformation of the elastic zone 11a, which has the consequence that the inlet port 8d connected to the lower pressure source, i.e. the pressure P1 is closed so that the inlet port 8e connected to the upper pressure source P2 communicates completely with the outlet port 8f of pressure P3 outlet valve 4, the pilot pressure P3 being in this way equal to the pressure P2. The bladder 4 is in this way subjected to the pressure P2 and its volume is maximum, which corresponds to an air flow which is minimum. The other capsule B receiving no signal.

La deuxième période T2, illustrée par les figures 5 et 6 est destinée à permettre le retour dans son état initial de la zone déformée 11a, aucune des deux capsules ne reçoit de signal de consigne, l'élément mobile 9 de diviseur de pression 8 conservant sa position de manière à ce que la pression de sortie P3 soit toujours égale à la pression P2.The second period T2, illustrated by FIGS. 5 and 6, is intended to allow the deformed zone 11a to return to its initial state, neither of the two capsules receives a reference signal, the movable element 9 of pressure divider 8 retaining its position so that the outlet pressure P3 is always equal to the pressure P2.

La troisième période T3, illustrée par les figures 7 et 8, est destinée à placer l'élément mobile 8 du diviseur de pression 9 dans une position dépendante du signal de détection S émis par la source 1.The third period T3, illustrated by FIGS. 7 and 8, is intended to place the movable element 8 of the pressure divider 9 in a position dependent on the detection signal S emitted by the source 1.

L'information captée par la sonde 1 est transmise à l'organe de commande 2 qui émet un signal de commande ou consigne C2 à l'élément chauffant 13b de la seconde capsule B, destinée au déplacement en sens inverse de l'organe mobile 9 du diviseur de pression 8 sur une course déterminée par la valeur de la consigne C2, grâce au déplacement de la zone élastique 11b en vue d'obtenir la pression de pilotage par le mélange ainsi obtenu des deux pressions d'alimentation. Le cycle représenté permet d'associer, à une valeur de consigne égale aux 3/4 de la consigne maximale une valeur de pression de pilotage P3 égale aux 3/4 de la différence des presions (P1-P2), et, la réponse est de ce fait linéaire sur toute la plage de régulation.The information captured by the probe 1 is transmitted to the control member 2 which sends a control signal or setpoint C2 to the heating element 13b of the second capsule B, intended for the displacement in the opposite direction of the movable member 9 of the pressure divider 8 over a stroke determined by the value of the setpoint C2, by virtue of the displacement of the elastic zone 11b in order to obtain the pilot pressure by the mixture thus obtained of the two supply pressures. The cycle shown makes it possible to associate, with a setpoint value equal to 3/4 of the maximum setpoint, a pilot pressure value P3 equal to 3/4 of the difference in pressures (P1-P2), and, the response is therefore linear over the entire regulation range.

Le chauffage de la capsule B peut s'effectuer soit pendant un temps variable en fonction des informations de la sonde de détection 1 avec une puissance constante, soit pendant un temps constant avec une puissance variable en fonction des informations de la sonde 1.Heating of the capsule B can be carried out either for a variable time as a function of the information from the detection probe 1 with constant power, or for a constant time with power variable depending on probe 1 information.

La quatrième période T4, représentée sur les figures 9 et 10 dont la durée est supérieure à 50 % de la durée totale du cycle, est destinée à maintenir l'élément mobile 9 du diviseur de pression 8 dans sa position déterminée par la période précédente de manière à ce que la pression de pilotage P3 reste égale aux 3/4 de (P1-P2), durant cette période aucune des capsules ne reçoit un signal de consigne.The fourth period T4, represented in FIGS. 9 and 10, the duration of which is greater than 50% of the total duration of the cycle, is intended to maintain the movable element 9 of the pressure divider 8 in its position determined by the preceding period of so that the pilot pressure P3 remains equal to 3/4 of (P1-P2), during this period none of the capsules receives a setpoint signal.

La deuxième capsule B retrouve ainsi la position non déformée, la zone élastique ayant gardé sa position, de la même façon que la capsule A lors de la deuxième période. Puis, il y a retour à la période T1.The second capsule B thus finds the undeformed position, the elastic zone having kept its position, in the same way as the capsule A during the second period. Then there is a return to period T1.

Selon un autre mode d'utilisation de ce dispositif, son cycle de fonctionnement peut être celui illustré par les figures 11 à 15.According to another mode of use of this device, its operating cycle can be that illustrated by FIGS. 11 to 15.

Ce cycle a une durée totale de plusieurs minutes et comprend au départ, trois périodes T1, T2, T3 suivies d'une succession de période T2 et T3.This cycle has a total duration of several minutes and initially includes three periods T1, T2, T3 followed by a succession of periods T2 and T3.

La première période T1 est illustrée par les figures 11 et 12. Durant cette période, l'organe de commande 2 transmet une consigne C2, correspondant au signal S émis par la sonde 1, à l'élément chauffant 13b de la capsule B dont la zone élastique 11b se déforme et provoque le déplacement de l'élément mobile 9 du diviseur de pression 8 dans une position voulue définie par les paramètres de commande et ceci afin d'obtenir une pression de pilotage P3 de la vanne 4 appropriée aux besoins de ventilation du local 7, l'autre capsule A ne recevant aucun signal de consigne.The first period T1 is illustrated in FIGS. 11 and 12. During this period, the control member 2 transmits a setpoint C2, corresponding to the signal S emitted by the probe 1, to the heating element 13b of the capsule B, the elastic zone 11b deforms and causes the movable element 9 of the pressure divider 8 to move to a desired position defined by the control parameters, in order to obtain a pilot pressure P3 of the valve 4 suitable for ventilation needs from room 7, the other capsule A receiving no setpoint signal.

La deuxième période T2 est illustrée par les figures 13 et 14. Durant cette période aucune capsule ne reçoit un signal de consigne pendant un temps défini, l'élément mobile 9 du diviseur de pression 8 conservant sa position. La zone élastique 11b retrouve aussi une position non déformée, et la pression de pilotage P3 garde la même valeur que lors de la période précédente.The second period T2 is illustrated in FIGS. 13 and 14. During this period, no capsule receives a reference signal for a defined time, the movable element 9 of the pressure divider 8 retaining its position. The elastic zone 11b also finds an undistorted position, and the piloting pressure P3 keeps the same value as during the previous period.

Durant la troisième période T3 illustrée par les figures 15 et 18, la valeur du signal S de la sonde 1 est comparée à la valeur qu'il avait lors de la précédente mesure.During the third period T3 illustrated by FIGS. 15 and 18, the value of the signal S of the probe 1 is compared with the value it had during the previous measurement.

Si la nouvelle mesure indique un besoin en ventilation plus important, comme plus particulièrement représenté aux figures 15 et 16, l'organe de commande 2 émet un signal de consigne C2 destinée au déplacement de l'élément mobile 9 du diviseur de pression 8 par suite de la déformation de la zone élastique 11b de la capsule B, de telle sorte que l'orifice d'entrée 8d relié à la source de pression inférieure P1 communique plus largement avec l'orifice de sortie 8f fournissant ainsi une pression de pilotage P3 de la vanne 4 plus proche de la pression inférieure P1. la vessie 4 est de cette façon soumise à une pression plus proche de P1 son volume diminue et le débit d'air augmente.If the new measurement indicates a greater need for ventilation, as more particularly shown in FIGS. 15 and 16, the control member 2 emits a setpoint signal C2 intended for the displacement of the movable element 9 of the pressure divider 8 as a result of the deformation of the elastic zone 11b of the capsule B, so that the inlet port 8d connected to the lower pressure source P1 communicates more widely with the outlet port 8f thus providing a pilot pressure P3 of the valve 4 closer to the lower pressure P1. the bladder 4 is in this way subjected to a pressure closer to P1 its volume decreases and the air flow increases.

Si au contraire, la nouvelle mesure indique un besoin en ventila­tion moins important, comme représenté aux figures 17 et 18, il y a une émission par l'organe de commande 2 d'une consigne C1 transmise à la capsule A destinée au déplacement de l'élément mobile 9 du diviviseur de pression 8 en sens inverse, par suite de la déformation de sa zone élastique 11a, de telle sorte que l'orifice d'entrée 8e relié à la sonde de pression supérieure P2 communique plus largement avec l'orifce de sortie 8f fournis­sant une pression de pilotage P3 plus proche de P2. La vessie 4 est de cette façon soumise à une pression plus proche de P2, son volume augmente et le débit d'air diminue.If, on the contrary, the new measurement indicates a lower need for ventilation, as shown in FIGS. 17 and 18, there is an emission by the control member 2 of a setpoint C1 transmitted to the capsule A intended for the movement of the mobile element 9 of the pressure divider 8 in the opposite direction, as a result of the deformation of its elastic zone 11a, so that the inlet orifice 8e connected to the upper pressure probe P2 communicates more widely with the orifice 8f outlet supplying a pilot pressure P3 closer to P2. The bladder 4 is in this way subjected to a pressure closer to P2, its volume increases and the air flow decreases.

Claims (13)

1. Dispositif de commande pour installation de réglage du débit de ventilation d'un local à atmosphère contrôlée comprenant au moins une sonde (1) placée dans le local (7) considéré pour capter l'information désirée, telle que, la température, le taux d'hydrométrie, le taux de dioxyde de carbone ou autres similaires, ou encore l'occupation ou l'inoccupation de ce local (7), une vanne (4), du genre vessie déformable, placée dans le conduit (6) de ventilation du local (7) et commandée par pression de pilotage (P3) de la vanne (4) en fonction des informations captées par la sonde (1), caractérisé en ce qu'il comprend en combinaison, un diviseur de pression (8) destiné à délivrer la pression de pilotage (P3) de la vanne (4) à partir des différentes pressions (P1) et (P2) de deux sources de pression auxquelles il est raccordé, deux capsules déformables (A, B) en fonction des signaux de consignes reçus, et agissant sur un élément mobile (9) du diviseur de pression (8) avec des effets inverses pour faire varier la pression de pilotage (P3) en fonction des consignes précitées, des moyens d'alimentation en énergie (13a, 13b), nécessaires à la variation de la pression interne dans les capsules (A, B), en fonction des consignes reçues, des moyens (12a,12b) associés aux capsules (A,B) permettant de s'affranchir des effets de la variation de la pression atmosphérique, et un organe de commande (2) des moyens d'alimentation en énergie (13a,13b) aptes à recevoir un signal (S) émis par la sonde (1) et à émettre, suivant un cycle prédéterminé constitué d'une succession de périodes d'alimentation et de relaxation des deux capsules (A,B), un signal de commande de la pression de pilotage (P3). 1. Control device for installation for adjusting the ventilation flow rate of a room with a controlled atmosphere comprising at least one probe (1) placed in the room (7) considered to capture the desired information, such as, temperature, rate of hydrometry, rate of carbon dioxide or other similar, or even the occupation or vacancy of this room (7), a valve (4), of the deformable bladder type, placed in the conduit (6) of ventilation of the room (7) and controlled by pilot pressure (P3) of the valve (4) according to the information received by the probe (1), characterized in that it comprises in combination, a pressure divider (8) intended to deliver the pilot pressure (P3) of the valve (4) from the different pressures (P1) and (P2) of two pressure sources to which it is connected, two deformable capsules (A, B) according to the signals instructions received, and acting on a movable element (9) of the pressurizer there are (8) with reverse effects for varying the pilot pressure (P3) as a function of the aforementioned instructions, energy supply means (13a, 13b), necessary for the variation of the internal pressure in the capsules (A , B), as a function of the instructions received, means (12a, 12b) associated with the capsules (A, B) making it possible to overcome the effects of the variation in atmospheric pressure, and a control member (2) of the means power supply (13a, 13b) capable of receiving a signal (S) emitted by the probe (1) and emitting, according to a predetermined cycle consisting of a succession of periods of feeding and relaxation of the two capsules ( A, B), a pilot pressure control signal (P3). 2. Dispositif selon la revendication 1, caractérisé en ce que chaque capsule (A, B) déformable est constituée par un corps (10a, 10b), en forme d'enveloppe fermée, dont une partie de paroi (11a, 11b) est élasti­quement mobile en direction de l'élément mobile (9) du diviseur de pression (8) en vue de le déplacer dans la position déterminée par le signal de consigne reçu, par cette capsule, de l'organe de commande (2). 2. Device according to claim 1, characterized in that each deformable capsule (A, B) is constituted by a body (10a, 10b), in the form of a closed envelope, of which a wall part (11a, 11b) is elastically movable towards the movable element (9) of the pressure divider (8) in order to move it into the position determined by the setpoint signal received, by this capsule, from the control member (2). 3. Dispositif selon la revendication 2, caractérisé en ce que la paroi (11b) de la capsule (B) a une épaisseur inférieure à la paroi (11a) de la capsule (A). 3. Device according to claim 2, characterized in that the wall (11b) of the capsule (B) has a thickness less than the wall (11a) of the capsule (A). 4. Dispositif selon la revendication 1, caractérisé en ce que les deux capsules (A, B) sont reliées à l'air extérieur par un passage calibré (12a, 12b) du type microfuite contrôlée, de telle manière que les quantités d'air qui peuvent s'échapper des capsules (A,B) pendant les périodes d'ali­ mentation, sont négligeables. 4. Device according to claim 1, characterized in that the two capsules (A, B) are connected to the outside air by a calibrated passage (12a, 12b) of the controlled micro-leakage type, so that the quantities of air which can escape from the capsules (A, B) during periods of ali are negligible. 5. Dispositif selon la revendication 1, caractérisé en ce que les moyens de déplacement de la partie de paroi mobile (11a, 11b) de chaque capsule (A, B) en direction de l'élément mobile (9) du diviseur de pres­sion (8) sont constitués par un élément chauffant (13a, 13b), du type résistif, dont la température augmente en fonction du courant électrique appliqué, ce qui a pour effet d'augmenter la pression interne de cette capsule et de repousser sa partie de paroi mobile. 5. Device according to claim 1, characterized in that the means for moving the movable wall part (11a, 11b) of each capsule (A, B) in the direction of the movable element (9) of the pressure divider ( 8) are constituted by a heating element (13a, 13b), of the resistive type, the temperature of which increases as a function of the electric current applied, which has the effect of increasing the internal pressure of this capsule and of pushing back its wall part mobile. 6. Dispositif selon la revendication 1, caractérisée en ce que l'organe de commande (2) permet de déclencher des périodes d'alimentation en énergie des capsules (A,B), de programmer une succession de périodes d'alimentation des capsules (A,B), de sélectionner pour une période d'alimen­tation donnée la capsule qui doit par son action sur l'élément mobile (8) du diviseur de pression (9), déterminer l'ouverture de la vanne (4) en fonction des signaux provenant de la sonde (1) recueillis pendant la période de relaxation, et de définir, pour cette période, la puissance à fournir à la capsule précitée en fonction des signaux provenant de la sonde (1) pendant ladite période de relaxation. 6. Device according to claim 1, characterized in that the control member (2) makes it possible to trigger periods of energy supply to the capsules (A, B), to program a succession of periods of supply to the capsules ( A, B), to select for a given feeding period the capsule which must, by its action on the movable element (8) of the pressure divider (9), determine the opening of the valve (4) according to the signals from the probe (1) collected during the relaxation period, and to define, for this period, the power to be supplied to the abovementioned capsule as a function of the signals coming from the probe (1) during said relaxation period. 7. Dispositif selon la revendication 1, caractérisé en ce que la sonde de détection (1) placée dans le local (7) est une sonde à infrarouge. 7. Device according to claim 1, characterized in that the detection probe (1) placed in the room (7) is an infrared probe. 8. Dispositif selon la revendication 1, caractérisé en ce que les moyens d'alimentation en énergie des capsules (A,B) sont constitués par au moins une pile électrique. 8. Device according to claim 1, characterized in that the energy supply means of the capsules (A, B) consist of at least one electric battery. 9. Dispositif selon la revendication 1, caractérisé en ce que, à l'élément mobile (9) du diviseur de pression (8) est associé un frein (14) destiné à éliminer toute poursuite parasitaire de sa course. 9. Device according to claim 1, characterized in that, with the movable element (9) of the pressure divider (8) is associated a brake (14) intended to eliminate any parasitic pursuit of its stroke. 10. Dispositif selon la revendication 1, caractérisé en ce que le conduit de sortie (8f) de la pression de pilotage (P3) comporte un étran­glement (15) de forme conique. 10. Device according to claim 1, characterized in that the outlet pipe (8f) of the pilot pressure (P3) comprises a throttle (15) of conical shape. 11. Cycle de mise en oeuvre du dispositif selon la revendication 1, caractérisé en ce que la durée totale est de plusieurs minutes et qu'il comprend les quatre périodes suivantes :
- une première période durant laquelle l'organe de commande émet un signal (C1) de consigne transmis à la première capsule (A), c'est à dire à celle destinée à la remise en position d'origine de l'élément mobile (9) du diviseur de pression (S), de telle sorte que l'orifice d'en­trée (8e) relié à la source de pression (P2), communique avec l'orifice de sortie (8f) fournissant la pression de pilotage (P3) de la vanne (4), la vessie (4) est de cette façon soumise à la pression (P2), tandis que l'autre orifice d'entrée (8d) est obturé, l'autre capsule (B) ne recevant aucun signal,
- une deuxième période prévue pour permettre la relaxation des deux capsules (A, B), aucune ne recevant un signal de consigne, l'élément mobile (9) du diviseur de pression (8) conservant sa position,
- une troisième période durant laquelle chaque sonde (1) émet un signal d'information transmis à l'organe de commande (2) qui émet lui-même un signal de commande transmis à la seconde capsule (B), destinée au déplacement, en sens inverse de l'organe mobile (9) du diviseur de pres­sion (8), sur une course déterminée par les informations délivrées par la sonde de détection (1), en vue d'obtenir un mélange approprié des deux pressions (P1, P2) d'alimentation de la pression de pilotage (P3) de la vanne (4) correspondant au besoin du local (7), l'autre capsule (A) ne recevant aucun signal, et
- une quatrième période dont la durée est supérieure à 50 % de la durée du cycle complet prévue pour permettre la relaxaton des deux capsules (A, B), aucune ne recevant de signal de consigne, de sorte que l'élément mobile (9) du diviseur de pression (8) garde la même position que lors de la précédente période, et le cycle recommence. 11. Implementation cycle of the device according to claim 1, characterized in that the total duration is several minutes and that it comprises the following four periods:
- a first period during which the control unit emits a setpoint signal (C1) transmitted to the first capsule (A), that is to say that intended for returning the movable element to the original position ( 9) of the pressure divider (S), so that the inlet port (8e) connected to the pressure source (P2) communicates with the port of outlet (8f) supplying the pilot pressure (P3) of the valve (4), the bladder (4) is in this way subjected to the pressure (P2), while the other inlet orifice (8d) is closed , the other capsule (B) receiving no signal,
a second period provided for allowing the relaxation of the two capsules (A, B), neither receiving a set signal, the movable element (9) of the pressure divider (8) retaining its position,
- a third period during which each probe (1) transmits an information signal transmitted to the control unit (2) which itself emits a control signal transmitted to the second capsule (B), intended for movement, in opposite direction of the movable member (9) of the pressure divider (8), on a stroke determined by the information delivered by the detection probe (1), in order to obtain an appropriate mixture of the two pressures (P1, P2 ) supplying the pilot pressure (P3) to the valve (4) corresponding to the needs of the room (7), the other capsule (A) receiving no signal, and
- a fourth period, the duration of which is greater than 50% of the duration of the complete cycle provided for allowing the relaxation of the two capsules (A, B), none receiving a set signal, so that the movable element (9) the pressure divider (8) keeps the same position as during the previous period, and the cycle starts again. 12. Cycle de mise en oeuvre du dispositif selon la revendication 1, caractérisé en ce que la durée totale est de plusieurs minutes et qu'il comprend les trois périodes suivantes :
- une première période durant laquelle l'organe de commande (2) émet un signal de consigne (C2) transmis à la capsule (8) destinée au déplacement de l'élément mobile (9) du diviseur de pression (S) à une position déterminée par les informations de commande émises par chaque sonde (1) de détection du local (7), pour obtenir une pression de sortie (P3) de la vanne (4) appropriée au besoin en ventilation du local (7), tandis que l'autre capsule (A) ne reçoit aucun signal de consigne,
- une deuxième période prévue pour la relaxation des deux capsules (A, B), aucune ne recevant de signal de consigne, l'élément mobile (9) du diviseur de pression (8) conservant sa position, et
- une troisième période durant laquelle la valeur du signal (S) émis par la sonde de détection (1) dans le local est comparée à celle de la précédente mesure et durant laquelle, si le besoin de ventilation est plus important, l'organe de commande (2) émet un signal (C2) de consigne transmis à la capsule destinée au déplacement du diviseur de pression (9) de telle sorte que l'orifice d'entrée (8d) relié à la source de pression infé­rieure (P1) communique plus largement avec l'orifice de sortie (8f) de manière à fournir une pression de pilotage (P3) de la vanne (4) plus proche de la pression inférieure (P1), la vessie (4) étant de cette façon soumise à une pression plus proche de (P1), son volume diminue et le débit d'air augmente, et si, au contraire, le besoin en ventilation détecté par chaque sonde (1) de local (7) est plus faible, l'organe de commande (2) émet un signal (C1) de consigne transmis à l'autre capsule (A), de telle sorte que - l'élément mobile (9) du diviseur de pression (8) est déplacé en sens inverse de telle manière que l'orifice d'entrée (8e) relié à la source de pression supérieure (P2) communique plus largement avec l'orifice de sortie (8f) de manière à fournir une pression de pilotage (P3) de la vanne (4) plus proche de la pression supérieure (P2), la vessie (4) étant de cette façon soumise à la pression la plus proche de (P2), son volume augmente et le débit d'air diminue. 12. Implementation cycle of the device according to claim 1, characterized in that the total duration is several minutes and that it comprises the following three periods:
- a first period during which the control member (2) emits a setpoint signal (C2) transmitted to the capsule (8) intended for the displacement of the movable element (9) of the pressure divider (S) to a position determined by the control information emitted by each room detection probe (1) (7), to obtain an outlet pressure (P3) from the valve (4) appropriate to the ventilation requirement of the room (7), while the '' other capsule (A) receives no setpoint signal,
a second period provided for the relaxation of the two capsules (A, B), neither receiving a set signal, the movable element (9) of the pressure divider (8) retaining its position, and
- a third period during which the value of the signal (S) emitted by the detection probe (1) in the room is compared to that of the previous measurement and during which, if the need for ventilation is greater, the command (2) emits a setpoint signal (C2) transmitted to the capsule intended for the displacement of the pressure divider (9) so that the inlet port (8d) connected to the lower pressure source (P1) communicates more widely with the outlet port (8f) of so as to provide a pilot pressure (P3) of the valve (4) closer to the lower pressure (P1), the bladder (4) being in this way subjected to a pressure closer to (P1), its volume decreases and the air flow increases, and if, on the contrary, the need for ventilation detected by each room probe (1) (7) is lower, the control member (2) emits a signal (C1) of transmitted reference to the other capsule (A), so that - the movable element (9) of the pressure divider (8) is moved in opposite directions so that the inlet (8e) connected to the source of higher pressure (P2) communicates more widely with the outlet orifice (8f) so as to provide a pilot pressure (P3) of the valve (4) more proc he of the upper pressure (P2), the bladder (4) being in this way subjected to the pressure closest to (P2), its volume increases and the air flow decreases. 13. Cycle de mise en oeuvre du dispositif selon la revendication 1, caractérisé en ce qu'il comprend :
- une première période qui commence, dès lors que la sonde (1) détecte une présence, alors que la vessie (4) a un volume maximum et que le débit de ventilation est minimum par l'émission d'un signal de consigne (C2) de l'organe de commande transmis à la capsule (B) destinée au déplacement en sens inverse du diviseur de pression de telle sorte que l'orifice d'entrée (8d) relié à la nouvelle pression P1 communique avec l'orifice de sortie (8f), l'autre orifice d'entrée relié à la pression P2 étant obturé, en fournissant ainsi une pression de pilotage P3 de la vessie, cette vessie étant de cette façon soumise à la pression P1 et son volume minimum, ce qui correspond à un débit en air qui est maximum, cette période se poursuivant en maintenant cet état tant que des signaux (S) de détection de présence se succèdent à des intervalles de temps inférieurs à une durée pré-déterminée
- une seconde période qui commence, dès lors que la sonde (1) n'a pas détecté de présence pendant l'intervalle de temps de durée pré-­déterminée précitée, alors que la vessie a un volume minimum et un débit en air maximum, par l'émission d'un signal de consigne (C1) de l'organe de commande transmis à la capsule (A) reliée à la source de pression P1 de telle sorte que l'orifice d'entrée (8e) relié à la source de pression P2 communique avec l'orifice de sortie (8f), tandis que l'orifice (8d) relié à la pression P1 est obturé, en fournissant de cette façon une pression de pilotage P3 de la vessie (4), cette vessie (4) étant alors soumise à la presson P2, son volume étant maximum et le débit en air minimum, cette période se poursuivant, en maintenant cet état, tant qu'une présence n'est pas détectée. 13. Implementation cycle of the device according to claim 1, characterized in that it comprises:
- a first period which begins, as soon as the probe (1) detects a presence, while the bladder (4) has a maximum volume and the ventilation flow is minimum by the emission of a setpoint signal (C2 ) of the control member transmitted to the capsule (B) intended for the displacement in opposite direction of the pressure divider so that the inlet orifice (8d) connected to the new pressure P1 communicates with the outlet orifice (8f), the other inlet orifice connected to the pressure P2 being closed, thereby providing a pilot pressure P3 of the bladder, this bladder being in this way subjected to the pressure P1 and its minimum volume, which corresponds at a maximum air flow, this period continuing while maintaining this state as long as presence detection signals (S) follow one another at intervals of time less than a predetermined duration
- a second period which begins, as soon as the probe (1) has not detected presence during the time interval of the aforementioned predetermined duration, while the bladder has a minimum volume and a maximum air flow rate, by issuing a setpoint signal (C1) from the control member transmitted to the capsule (A) connected to the pressure source P1 so that the inlet orifice (8e) connected to the source pressure P2 communicates with the outlet orifice (8f), while the orifice (8d) connected to the pressure P1 is closed, thereby providing a pilot pressure P3 of the bladder (4), this bladder (4) being then subjected to the presson P2, its volume being maximum and the air flow minimum, this period continuing, maintaining this state, as long as a presence is not detected.
EP90402938A 1989-11-06 1990-10-19 Control device and operating cycle for a flow rate regulating system of a ventilation system of a room with controlled atmosphere Expired - Lifetime EP0427585B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90402938T ATE86378T1 (en) 1989-11-06 1990-10-19 CONTROL DEVICE AND DUTY CYCLE FOR THE FLOW CONTROL DEVICE OF THE VENTILATION OF A ROOM WITH CONTROLLED ATMOSPHERE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8914752 1989-11-06
FR8914752A FR2654197B1 (en) 1989-11-06 1989-11-06 CONTROL DEVICE FOR INSTALLATION FOR ADJUSTING THE VENTILATION FLOW OF A PREMISES WITH A CONTROLLED ATMOSPHERE AND OPERATING CYCLE.

Publications (2)

Publication Number Publication Date
EP0427585A1 true EP0427585A1 (en) 1991-05-15
EP0427585B1 EP0427585B1 (en) 1993-03-03

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EP90402938A Expired - Lifetime EP0427585B1 (en) 1989-11-06 1990-10-19 Control device and operating cycle for a flow rate regulating system of a ventilation system of a room with controlled atmosphere

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US (1) US5143287A (en)
EP (1) EP0427585B1 (en)
JP (1) JPH03168549A (en)
AT (1) ATE86378T1 (en)
CA (1) CA2029212A1 (en)
DE (1) DE69001010T2 (en)
ES (1) ES2039119T3 (en)
FR (1) FR2654197B1 (en)

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Also Published As

Publication number Publication date
FR2654197A1 (en) 1991-05-10
FR2654197B1 (en) 1992-01-24
US5143287A (en) 1992-09-01
EP0427585B1 (en) 1993-03-03
JPH03168549A (en) 1991-07-22
ES2039119T3 (en) 1993-08-16
ATE86378T1 (en) 1993-03-15
CA2029212A1 (en) 1991-05-07
DE69001010T2 (en) 1993-06-17
DE69001010D1 (en) 1993-04-08

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