EP0634613B1 - Automatic flow controller for ventilation and air conditioning systems - Google Patents

Automatic flow controller for ventilation and air conditioning systems Download PDF

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Publication number
EP0634613B1
EP0634613B1 EP94420205A EP94420205A EP0634613B1 EP 0634613 B1 EP0634613 B1 EP 0634613B1 EP 94420205 A EP94420205 A EP 94420205A EP 94420205 A EP94420205 A EP 94420205A EP 0634613 B1 EP0634613 B1 EP 0634613B1
Authority
EP
European Patent Office
Prior art keywords
damper
duct
regulator
air
moveable member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94420205A
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German (de)
French (fr)
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EP0634613A1 (en
Inventor
Laurent Barbarin
Christian Barbarin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anjos Ventilation SAS
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Individual
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Filing date
Publication date
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Publication of EP0634613A1 publication Critical patent/EP0634613A1/en
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Publication of EP0634613B1 publication Critical patent/EP0634613B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/75—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for maintaining constant air flow rate or air velocity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7786—Turbine or swinging vane type reactor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/785—With retarder or dashpot
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7869—Biased open
    • Y10T137/7875—Pivoted valves

Definitions

  • the present invention relates to an automatic flow regulator intended to equip the terminal ducts of ventilation, air conditioning or similar installations in order to maintain a determined flow independently of the variations in pressure.
  • Fig. 1 is a perspective view illustrating the general arrangement of the automatic regulator according to the invention.
  • Fig. 2 is a schematic axial section of the regulator shown in FIG. 1.
  • the regulator considered comprises a tubular body 1 which will be assumed to be made of molded plastic, which body comprises at least one end cuff 1 a for its fitting onto a pipe C.
  • the axial opening of the body 1 defines a passage duct of air which has two opposite flat walls 1 b oriented parallel to one another, a flat wall 1 c oriented perpendicular to said walls 1 b , and a wall 1 d with an arched or arched profile which faces said wall 1 c .
  • the body 1 contains a rigid flap 2 which is dimensioned in width so as to adapt to reduced clearance between the parallel walls 1 b of the duct.
  • the underside of segment 2 has a tab 2 is turned obliquely downwards, the free end is integral with two lugs 2 b which project outwardly to engage in corresponding depressions in the body 1 and thus form a hinge pin for said flap.
  • this flap 2 which is turned away from the cuff 1 a , beyond the axis 2 b , is bent in the direction of the corresponding part of the body 1 in order to define a sort of spout 2 c able to bear against the body 1 in order to constitute a stop limiting the tilting of the shutter 2 on closing.
  • a maximum stop 2 c corresponds a minimum stop constituted by two lateral flanges 2 d secured to the underside of the flap 2 to come to bear against the wall 1 c of the duct.
  • the shutter 2 is associated with elastic return means in the open position, which consist of one or more blades 3 inserted in a slot provided behind the tab 2 a in order to come to bear against the body 1, below the spout 2 tsp .
  • elastic return means in the open position, which consist of one or more blades 3 inserted in a slot provided behind the tab 2 a in order to come to bear against the body 1, below the spout 2 tsp .
  • a shock absorber 4 which comprises a piston 4 a coupled to the lower wall of the flap 2, which piston is engaged in practically sealed sliding in a cylinder 4 b which is itself coupled to a small square 5 clipped into an opening in the wall 1 c .

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)

Description

La présente invention a pour objet un régulateur automatique de débit destiné à équiper les conduits terminaux des installations de ventilation, de conditionnement d'air ou similaires en vue d'assurer le maintien d'un débit déterminé indépendamment des variations de la pression.The present invention relates to an automatic flow regulator intended to equip the terminal ducts of ventilation, air conditioning or similar installations in order to maintain a determined flow independently of the variations in pressure.

Jusqu'à ces dernières années, ce résultat était obtenu à l'aide de clapets de réglage à manoeuvre manuelle, constitués en fait par des appareillages analogues à des vannes ou registres. Le réglage initial des clapets se révélant délicat et les caractéristiques de l'installation variant dans le temps, on a proposé des régulateurs à fonctionnement automatique propres à permettre, moyennant la modification de la section de passage d'air, l'obtention d'un débit constant quelles que soient les variations de la pression à l'intérieur des conduits.Until recent years, this result was obtained by means of manually operated adjustment valves, constituted in fact by apparatus similar to valves or dampers. The initial adjustment of the valves being found to be delicate and the characteristics of the installation varying over time, automatic regulators have been proposed capable of allowing, by modifying the air passage section, to obtain a constant flow whatever the pressure variations inside the conduits.

Dans les régulateurs connus, la modification de la section de passage est assurée à l'aide d'un organe mobile sur lequel agissent en antagonisme la pression de l'air véhiculé et des moyens élastiques convenablement agencés (voir FR-A-1 313 310). L'expérience démontre toutefois que les constructions proposées sont complexes et coûteuses, se révèlent fréquemment de fonctionnement bruyant et comportent une plage de régulation de faible amplitude, au surplus peu stable dans le temps.In the known regulators, the modification of the passage section is ensured by means of a movable member on which act in antagonism the pressure of the conveyed air and suitably arranged elastic means (see FR-A-1 313 310 ). Experience has shown, however, that the proposed constructions are complex and expensive, often prove to be noisy and have a low amplitude regulation range, which is also not very stable over time.

De plus, il est connu, de par le document FR-A-2 241 749, de modifier la section de passage à l'aide d'un organe mobile sur lequel agissent en antagonisme la pression de l'air véhiculé et le poids propre dudit organe mobile.In addition, it is known from document FR-A-2 241 749 to modify the passage section using a movable member on which the pressure of the conveyed air and the self-weight act in antagonism. of said movable member.

C'est à ces inconvénients qu'entend remédier la présente invention, laquelle a pour objet le régulateur automatique qui est défini à la revendication 1.It is these drawbacks that the present invention intends to remedy, which relates to the automatic regulator which is defined in claim 1.

En fait le régulateur suivant l'invention comprend en combinaison :

  • un corps tubulaire profilé pour définir un conduit présentant deux parois planes parallèles réunies par une paroi plane et par une paroi arquée, lequel corps est agencé pour être assujetti à une canalisation ;
  • un volet rigide qui, établi à un profil semblable à celui de la section du conduit précité, est articulé au corps transversalement par rapport à l'axe du conduit de celui-ci et qui est associé à deux butées pour définir une position de fermeture maximale et une position d'ouverture maximale, cette dernière ménageant une chambre de pression qui est fermée au niveau de l'articulation du volet et qui s'ouvre vers l'amont dans le sens de circulation de l'air ;
  • des moyens élastiques associés au volet en vue de ytendre à ramener celui-ci à la position d'ouverture maximale ;
  • et un amortisseur dont l'organe mobile est attelé au volet en vue d'éviter les effets de pompage.
In fact, the regulator according to the invention comprises in combination:
  • a tubular body profiled to define a conduit having two parallel planar walls joined by a planar wall and by an arcuate wall, which body is arranged to be subjected to a pipe;
  • a rigid flap which, established with a profile similar to that of the section of the aforementioned conduit, is articulated to the body transversely with respect to the axis of the conduit thereof and which is associated with two stops to define a maximum closed position and a maximum open position, the latter providing a pressure chamber which is closed at the level of the flap joint and which opens upstream in the direction of air circulation;
  • elastic means associated with the flap in order to ytendre to return the latter to the maximum open position;
  • and a shock absorber, the movable member of which is coupled to the flap in order to avoid the pumping effects.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:

Fig. 1 est une vue en perspective illustrant l'agencement général du régulateur automatique suivant l'invention.Fig. 1 is a perspective view illustrating the general arrangement of the automatic regulator according to the invention.

Fig. 2 est une coupe axiale schématique du régulateur représenté en fig. 1.Fig. 2 is a schematic axial section of the regulator shown in FIG. 1.

Le régulateur considéré comprend un corps tubulaire 1 qu'on supposera réalisé en matière plastique moulée, lequel corps comporte au moins une manchette d'extrémité 1a pour son emboîtement sur une canalisation C. L'ouverture axiale du corps 1 définit un conduit de passage d'air qui présente deux parois planes opposées 1b orientées parallèlement l'une à l'autre, une paroi plane 1c orientée perpendiculairement auxdites parois 1b, et une paroi 1d à profil arqué ou voûté qui fait face à ladite paroi 1c.The regulator considered comprises a tubular body 1 which will be assumed to be made of molded plastic, which body comprises at least one end cuff 1 a for its fitting onto a pipe C. The axial opening of the body 1 defines a passage duct of air which has two opposite flat walls 1 b oriented parallel to one another, a flat wall 1 c oriented perpendicular to said walls 1 b , and a wall 1 d with an arched or arched profile which faces said wall 1 c .

Le corps 1 renferme un volet rigide 2 qui est dimensionné en largeur de façon à s'adapter à jeu réduit entre les parois parallèles 1b du conduit. La face inférieure de ce volet 2 comporte une patte 2a tournée obliquement vers le bas, dont l'extrémité libre est solidaire de deux ergots 2b qui font saillie vers l'extérieur afin de s'engager dans des dépressions correspondantes du corps 1 et de former ainsi axe d'articulation pour ledit volet.The body 1 contains a rigid flap 2 which is dimensioned in width so as to adapt to reduced clearance between the parallel walls 1 b of the duct. The underside of segment 2 has a tab 2 is turned obliquely downwards, the free end is integral with two lugs 2 b which project outwardly to engage in corresponding depressions in the body 1 and thus form a hinge pin for said flap.

On observera que le bord transversal de ce volet 2 qui est tourné à l'opposé de la manchette 1a, au-delà de l'axe 2b, est recourbé en direction de la partie correspondante du corps 1 afin de définir une sorte de bec 2c apte à prendre appui contre le corps 1 en vue de constituer une butée limitant le basculement du volet 2 à la fermeture. A cette butée maximale 2c correspond une butée minimale constituée par deux rebords latéraux 2d solidaires de la face inférieure du volet 2 pour venir prendre appui contre la paroi 1c du conduit.It will be observed that the transverse edge of this flap 2 which is turned away from the cuff 1 a , beyond the axis 2 b , is bent in the direction of the corresponding part of the body 1 in order to define a sort of spout 2 c able to bear against the body 1 in order to constitute a stop limiting the tilting of the shutter 2 on closing. To this maximum stop 2 c corresponds a minimum stop constituted by two lateral flanges 2 d secured to the underside of the flap 2 to come to bear against the wall 1 c of the duct.

Au volet 2 sont associés des moyens élastiques de rappel en position ouverte, qui sont constitués par une ou plusieurs lames 3 insérées dans une fente prévue en arrière de la patte 2a afin de venir s'appliquer contre le corps 1, au-dessous du bec 2c. A l'opposé de ces moyens élastiques 3 est prévu un amortisseur 4 qui comprend un piston 4a attelé à la paroi inférieure du volet 2, lequel piston est engagé à coulissement pratiquement étanche dans un cylindre 4b qui est lui-même attelé à une petite équerre 5 clipsée dans une ouverture de la paroi 1c.The shutter 2 is associated with elastic return means in the open position, which consist of one or more blades 3 inserted in a slot provided behind the tab 2 a in order to come to bear against the body 1, below the spout 2 tsp . Opposite these elastic means 3 is provided a shock absorber 4 which comprises a piston 4 a coupled to the lower wall of the flap 2, which piston is engaged in practically sealed sliding in a cylinder 4 b which is itself coupled to a small square 5 clipped into an opening in the wall 1 c .

Le fonctionnement du régulateur suivant l'invention découle des explications qui précèdent et se comprend aisément.The operation of the regulator according to the invention follows from the foregoing explanations and is easily understood.

Lorsque l'air renfermé par la canalisation C n'est pas sous pression ou que tout au moins le courant d'air qui traverse ladite canalisation et le conduit du régulateur ne présente qu'une faible pression différentielle, l'action des moyens élastiques 3 sur le volet 2 est prépondérante, de telle sorte que ledit volet est maintenu à la position de pleine ouverture pour laquelle les rebords 2d prennent appui contre la paroi 1c. Il convient toutefois d'observer qu'à cette position, la présence des rebords 2d précités ménage un espace libre entre la face inférieure du volet 2 et la paroi 1c du conduit, lequel espace libre, ouvert en direction de la canalisation C, c'est-à-dire vers l'amont dans le sens de circulation de l'air (flèche F), fait fonction de chambre de pression, référencée 6 en fig. 2.When the air enclosed by line C is not under pressure or at least the air current which passes through said line and the regulator conduit exhibits only a low differential pressure, the action of the elastic means 3 on the shutter 2 is predominant, so that said shutter is maintained in the fully open position for which the edges 2 d bear against the wall 1 c . It should however be observed that at this position, the presence of the abovementioned flanges 2 d provides a free space between the underside of the flap 2 and the wall 1 c of the duct, which free space, open in the direction of the pipe C, that is to say upstream in the direction of air circulation (arrow F), acts as a pressure chamber, referenced 6 in fig. 2.

Dans ces conditions, lorsque la pression dans cette chambre 6 augmente, le volet 2 se soulève à l'encontre des moyens élastiques 3, en diminuant ainsi la surface de la section laissée libre dans le conduit par ledit volet. Le débit d'air est ainsi automatiquement réduit, jusqu'à atteindre une position d'équilibre entre la pression différentielle régnant de part et d'autre du régulateur et les moyens de rappel élastique 3. Cette position d'équilibre détermine une section libre de passage d'air correspondant à un débit en fonction de la pression différentielle précitée, étant noté que la portée du bec 2c contre le corps 1 limite en tout état de cause le déplacement angulaire du volet et évite une obturation trop importante.Under these conditions, when the pressure in this chamber 6 increases, the shutter 2 lifts up against the elastic means 3, thereby reducing the area of the section left free in the duct by said shutter. The air flow is thus automatically reduced, until reaching an equilibrium position between the differential pressure prevailing on either side of the regulator and the elastic return means 3. This equilibrium position determines a free cross section of air passage corresponding to a flow rate as a function of the aforementioned differential pressure, it being noted that the range of the nozzle 2 c against the body 1 limits in all In any event, the angular displacement of the flap and avoids an excessive blockage.

On obtient donc bien une régulation des débits dans telle ou telle branche d'un réseau en fonction des besoins, et cela indépendamment des différentes pressions régnant dans le réseau considéré de l'installation de ventilation à laquelle le régulateur est associé. De par son agencement, l'amortisseur 4 associé au volet 2 ne gêne en rien le déplacement angulaire lent dudit volet ; il n'intervient que pour s'opposer aux phénomènes de "battement" ou de "pompage" dont les clapets des installations de ventilation sont fréquemment le siège.We therefore obtain a regulation of flow rates in this or that branch of a network according to needs, and this independently of the different pressures prevailing in the considered network of the ventilation installation with which the regulator is associated. By its arrangement, the damper 4 associated with the shutter 2 does not hinder the slow angular displacement of said shutter; it intervenes only to oppose the phenomena of "flapping" or "pumping" of which the valves of the ventilation installations are frequently the seat.

Il va de soi que pour l'adaptation précise du régulateur suivant l'invention aux caractéristiques de débit de l'installation à laquelle il est destiné, on peut prévoir des réducteurs de section fixés de manière amovible, par exemple par simple clipsage élastique, dans la partie du conduit qui n'est pas occupée par le volet 2, c'est-à-dire au niveau de la paroi arquée 1d.It goes without saying that for the precise adaptation of the regulator according to the invention to the flow characteristics of the installation for which it is intended, it is possible to provide section reducers removably fixed, for example by simple elastic clipping, in the part of the duct which is not occupied by the flap 2, that is to say at the level of the arcuate wall 1 d .

Claims (5)

  1. Automatic flow regulator for ventilation, air-conditioning or similar units, of the kind equipped with a moveable member against which act, in opposition, the differential air pressure existing on either side of the said moveable member and elastic means for the purpose of modifying the air flow area, the said regulator comprising
    - elastic means (3) associated with the damper, for the purpose of bringing the latter back to the position of maximum opening;
    - and a dashpot (4), the moveable member (4a) of which is fastened to the damper, for the purpose of eliminating buffeting effects;
    characterized in that it comprises, in combination:
    - a tubular body (1) suitable for defining a duct having two parallel plane walls (1b) which are joined by a plane wall (1c) and an arched wall (1d), the said body being designed (at 1a) to be attached to a pipe (C);
    - a rigid damper (2) which, having a profile similar to that of the cross-section of the aforementioned duct, is articulated (at 2b) to the body (1) transversely to the axis of the duct of the latter, which damper is associated with two stops (2c, 2d) which define a position of maximum closure and a position of maximum opening, the latter providing a pressure chamber (6) which is closed substantially at the articulation (2b) of the damper and which opens to the upstream in the direction of blow of the air.
  2. Regulator according to Claim 1, characterized in that the elastic means associated with the damper (2) consist of at least one strip (3), one end of which bears against the body (1) while the opposite end is held fast to the said damper.
  3. Regulator according to either of Claims 1 and 2, characterized in that the stop defining the position of maximum closure consists of the transverse edge, curved in the form of a beak (2c), of the damper (2) which is located to the rear of the hinge pin (2b).
  4. Regulator according to any one of Claims 1 to 3, characterized in that the stop defining the position of maximum opening consists of two lateral rime (2d) provided on that face of the damper (2) which is turned towards the plane wall (1c) of the duct.
  5. Regulator according to any one of Claims 1 to 4, characterised in that the dashpot (4) comprises a moveable member in the form of a piston (4a) inserted so as to be able to slide in a virtually sealed manner in a cylinder (4b), the elements (4a, 4b) of this dashpot being fastened to the damper (2) and to the body (1).
EP94420205A 1993-07-15 1994-07-13 Automatic flow controller for ventilation and air conditioning systems Expired - Lifetime EP0634613B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308921A FR2707740B1 (en) 1993-07-15 1993-07-15 Automatic flow regulator for ventilation and air conditioning systems.
FR9308921 1993-07-15

Publications (2)

Publication Number Publication Date
EP0634613A1 EP0634613A1 (en) 1995-01-18
EP0634613B1 true EP0634613B1 (en) 1997-04-16

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EP94420205A Expired - Lifetime EP0634613B1 (en) 1993-07-15 1994-07-13 Automatic flow controller for ventilation and air conditioning systems

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US (1) US5406977A (en)
EP (1) EP0634613B1 (en)
DE (1) DE69402625T2 (en)
FR (1) FR2707740B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2738901B1 (en) * 1995-09-20 1997-11-21 Abb Flakt IMPROVED AIR FLOW REGULATOR DEVICE
DE19653945C2 (en) * 1996-12-21 2001-05-31 Mueller Erwin Gmbh & Co Volume flow control device for an air conditioning system
BE1011044A5 (en) * 1997-03-14 1999-04-06 Renson N V Facility for adjusting the airflow in a ventilation device
US9759442B2 (en) 2005-12-27 2017-09-12 American Aldes Ventilation Corporation Method and apparatus for passively controlling airflow
US7766734B2 (en) 2005-12-27 2010-08-03 American Aldes Ventilation Corporation Method and apparatus for passively controlling airflow
US8025077B2 (en) 2008-05-28 2011-09-27 Toyota Motor Engineering & Manufacturing North American, Inc. Mechanical fuse to seal pipes upon unintended rupture
FR3009069B1 (en) 2013-07-23 2015-10-09 Anjos Ventilation DEVICE FOR CONTROLLING THE FLOW OF AIR IN A PIPING
JP7126059B2 (en) * 2018-03-28 2022-08-26 パナソニックＩｐマネジメント株式会社 shutter, blower

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191615A (en) * 1961-06-09 1965-06-29 Allied Thermal Corp Automatic fluid controller
FR1313310A (en) * 1961-11-17 1962-12-28 Nouveaux Ateliers Lebrun Sa Air conditioning installation
SE375850B (en) * 1973-08-24 1975-04-28 Svenska Flaektfabriken Ab
US4117860A (en) * 1977-04-08 1978-10-03 Carlin Jack M Pressure differential flow retardant valve

Also Published As

Publication number Publication date
US5406977A (en) 1995-04-18
DE69402625D1 (en) 1997-05-22
FR2707740B1 (en) 1995-09-08
FR2707740A1 (en) 1995-01-20
EP0634613A1 (en) 1995-01-18
DE69402625T2 (en) 1997-11-13

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