FR2620522A1 - Temperature-limiting device for a fan of a controlled mechanical ventilation installation - Google Patents

Temperature-limiting device for a fan of a controlled mechanical ventilation installation Download PDF

Info

Publication number
FR2620522A1
FR2620522A1 FR8712851A FR8712851A FR2620522A1 FR 2620522 A1 FR2620522 A1 FR 2620522A1 FR 8712851 A FR8712851 A FR 8712851A FR 8712851 A FR8712851 A FR 8712851A FR 2620522 A1 FR2620522 A1 FR 2620522A1
Authority
FR
France
Prior art keywords
opening
temperature
section
mechanical ventilation
duct
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.)
Pending
Application number
FR8712851A
Other languages
French (fr)
Inventor
Andre Heydt
Michel Roussel
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.)
HCI SA
Original Assignee
HCI SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HCI SA filed Critical HCI SA
Priority to FR8712851A priority Critical patent/FR2620522A1/en
Publication of FR2620522A1 publication Critical patent/FR2620522A1/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F24F11/76—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 by means responsive to temperature, e.g. bimetal springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Ventilation (AREA)

Abstract

The present invention relates to a temperature-limiting device for a fan of a controlled mechanical ventilation installation. The device is characterised in that it is essentially constituted by a duct section 1 to be inserted into the duct of the mechanical ventilation installation upstream of the fan, this section 1 being provided with an opening 2 which is closed off, under the normal operating conditions, by a flap 3 mounted so as to rotate by means of a pin 4 on the duct section 1 and activated so as to open, in the event of an abnormal temperature rise, by a means 5 which reacts to a temperature gradient.

Description

Dispositif de limitation de température pour ventilateur
d'installation de ventilation mécanique contrôlée
La présente invention concerne le domaine de la ventilation mécanique d'immeubles d'habitation ou de bureaux, et a pour objet un dispositif de limitation de température pour ventilateur d'installation de ventilation mécanique contrôlée.Temperature limiting device for fan
installation of controlled mechanical ventilation
The present invention relates to the field of mechanical ventilation of residential or office buildings, and relates to a temperature limiting device for a ventilator of a controlled mechanical ventilation installation.

La nouvelle réglementation sur la protection incendie des immeubles d'habitation et des établissements recevant du public prévoit un certain nombre de dispositions relatives aux installations de ventilation mécanique contrôlée, à savoir, notamment, de prévoir le maintien en fonctionnement du ventilateur en lui imposant certaines caractéristiques de tenue à la température, les ventilateurs utilisés étant classés suivant quatre catégories en fonction de cette caractéristique. The new fire protection regulations for apartment buildings and establishments open to the public include a number of provisions relating to controlled mechanical ventilation installations, namely, in particular, to provide for the fan to continue operating by imposing certain characteristics on it. temperature resistance, the fans used are classified according to four categories according to this characteristic.

L'utilisation de tels ventilateurs présente cependant l'inconvénient d'occasionner un renchérissement de l'installation de ventilation mécanique dû aux modifications nécessaires desdits ventilateurs. The use of such fans, however, has the disadvantage of causing an increase in the cost of the mechanical ventilation installation due to the necessary modifications of said fans.

La présente invention a pour but de pallier ces inconvénients. The present invention aims to overcome these drawbacks.

Elle a, en effet, pour objet un dispositif de limitation de température pour ventilateur d'installation de ventilation mécanique contrôlée, caractérisé en ce qu'il est essentiellement constitué par un tronçon de conduit à insérer dans le conduit de l'installation de ventilation mécanique en amont du ventilateur, ce tron çon étant pourvu d'une ouverture obturée, en condition normale de fonctionnement, par un volet monté en rotation au moyen d'un axe sur le tronçon de conduit et actionné à l'ouverture, en cas d'élévation anormale de température, par un moyen réagissant à un gradient de température.  It relates, in fact, to a temperature limiting device for a ventilator of a controlled mechanical ventilation installation, characterized in that it essentially consists of a section of duct to be inserted into the duct of the mechanical ventilation installation upstream of the fan, this section being provided with an opening closed, in normal operating condition, by a flap mounted in rotation by means of an axis on the section of duct and actuated at the opening, in the event of abnormal rise in temperature, by means responsive to a temperature gradient.

L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à un mode de réa- lisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence au dessin schématique annexé, dans lequel
la figure 1 est une vue en coupe transversale du dispositif conforme à l'invention
la figure 2 est une vue en coupe suivant A-A de la figure 1, et
la figure 3 est une vue en perspective du volet de fermeture du conduit.The invention will be better understood, thanks to the description below, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawing, in which
Figure 1 is a cross-sectional view of the device according to the invention
FIG. 2 is a sectional view along AA of FIG. 1, and
Figure 3 is a perspective view of the flap for closing the duct.

Conformément à l'invention, et comme le montrent plus particulièrement, à titre d'exemple,-les figures 1 et 2 du dessin annexé, le dispositif de limitation de température pour ventilateur d'installation de ventilation mécanique contrôlée est essentiellement constitué par un tronçon de conduit 1 à insérer dans le conduit de l'installation de ventilation mécanique en amont du ventilateur, et pourvu d'une ouverture 2 obturée, en condition normale de fonctionnement du ventilateur, par un volet 3 monté en rotation au moyen d'un axe 4 sur le tronçon de conduit 1. Ce volet 3 est actionné à l'ouverture, dans le cas d'une élévation anormale de température, par un moyen 5 qui réagit à un gradient de température. According to the invention, and as shown more particularly, by way of example, FIGS. 1 and 2 of the appended drawing, the temperature limiting device for a ventilator of a controlled mechanical ventilation installation is essentially constituted by a section. of duct 1 to be inserted in the duct of the mechanical ventilation installation upstream of the fan, and provided with an opening 2 closed, in normal operating condition of the fan, by a flap 3 mounted in rotation by means of an axis 4 on the duct section 1. This shutter 3 is actuated at the opening, in the case of an abnormal rise in temperature, by means 5 which reacts to a temperature gradient.

L'ouverture 2 est avantageusement disposée dans la partie inférieure du tronçon 1 et s'étend, de préférence, en direction longitudinale, et le volet 3 est, de préférence, sous forme de deux éléments symétriques par rapport à l'axe de rotation 4, dont l'un s'appuie contre la face intérieure de l'ouverture 2 et dont l'autre s'appuie contre la face extérieure de l'ouverture 2, avec interposition d'un joint périphérique 6. Cette construction du volet 3 permet d'éliminer l'effet des forces de pression sur la rotation du volet autour de son axe 4. The opening 2 is advantageously arranged in the lower part of the section 1 and preferably extends in the longitudinal direction, and the flap 3 is preferably in the form of two symmetrical elements with respect to the axis of rotation 4 , one of which bears against the inside face of the opening 2 and the other of which rests against the outside face of the opening 2, with the interposition of a peripheral seal 6. This construction of the flap 3 allows to eliminate the effect of pressure forces on the rotation of the shutter about its axis 4.

Le moyen 5 réagissant à un gradient de température est avantageusement constitué par un empilement de bilames fixé à l'intérieur du conduit 1 par l'une de ses extrémités et relié à son autre extrémité, par l'intermédiaire d'une tige de liaison 7 à l'élément du volet 3 s'appuyant contre la face intérieure de l'ouverture 2. The means 5 reacting to a temperature gradient is advantageously constituted by a stack of bimetallic strips fixed inside the duct 1 by one of its ends and connected to its other end, by means of a connecting rod 7 to the component of the shutter 3 pressing against the inner face of the opening 2.

Afin d'assurer une bonne étanchéité du dispositif en position d'obturation du volet 3, l'élément de volet s'appuyant sur la face intérieure de l'ouverture 2 est avantageusement muni d'une masselotte 8. In order to ensure good sealing of the device in the closed position of the shutter 3, the shutter element resting on the inner face of the opening 2 is advantageously provided with a counterweight 8.

Lors d'une élévation anormale de température, l'empilement de bilames 5 agit sur la tige de liaison 7 dans le sens d'une rotation d'ouverture du volet 3 permettant une entrée d'air complémentaire dans le conduit de ventilation en amont du ventilateur et réalisant ainsi un abaissement de la température de l'air aspiré dans les locaux. L'utilisation d'un empilement de bilames permet une grande déflexion dudit empilement tout en assurant l'application d'une force de pivotement suffisante sur la tige 7 dans le sens d'une ouverture du volet 3. During an abnormal rise in temperature, the stack of bimetallic strips 5 acts on the connecting rod 7 in the direction of an opening rotation of the shutter 3 allowing additional air to enter the ventilation duct upstream of the fan and thereby achieving a lowering of the temperature of the air drawn into the premises. The use of a stack of bimetallic strips allows great deflection of said stack while ensuring the application of a sufficient pivoting force on the rod 7 in the direction of opening of the flap 3.

Conformément à une variante de réalisation de l'invention, non représentée au dessin annexé, le moyen 5 peut également être constitué sous forme d'un vérin pneumatique, électrique ou autre, dont l'actionnement est commandé par un détecteur de température taré à une valeur prédéterminée. In accordance with an alternative embodiment of the invention, not shown in the accompanying drawing, the means 5 can also be constituted in the form of a pneumatic, electric or other actuator, the actuation of which is controlled by a temperature detector calibrated at a predetermined value.

Sur le dessin annexé, le dispositif est représenté sous une forme de réalisation circulaire, cependant, il est également possible de réaliser le dispositif sous une forme de section carrée ou rectangulaire avec des embouts de branchement circulaire. Dans ce dernier mode de réalisation, le dispositif peut se présenter sous forme d'un boîtier de section constante dont le montage sur le conduit de ventilation pourra être réalisé au moyen d'adapteurs circulaires. In the accompanying drawing, the device is shown in a circular embodiment, however, it is also possible to produce the device in the form of a square or rectangular section with circular connection tips. In this latter embodiment, the device can be in the form of a box of constant cross section, the mounting of which on the ventilation duct can be achieved by means of circular adapters.

A titre d'exemple, la section de l'ouverture 2 pourra être équivalente à celle correspondant à un cercle d'un diamètre de 125 mm, et sera suffisante pour ré pondre aux exigences de la réglementation existante. By way of example, the section of the opening 2 may be equivalent to that corresponding to a circle with a diameter of 125 mm, and will be sufficient to meet the requirements of the existing regulations.

Grâce à l'invention, il est possible de réaliser un dispositif simple permettant de satisfaire aux exigences de la réglementation sur la protection incendie des immeubles d'habitation et des établissements recevant du public, en réalisant une régulation de la température de l'air extrait dans une limite permettant l'emploi de ventilateurs classiques sans modification de leurs caractéristiques, par simple création d'une fuite automatique en amont de chaque entrée du caisson ventilateur. Thanks to the invention, it is possible to produce a simple device making it possible to meet the requirements of the regulations on fire protection of apartment buildings and establishments open to the public, by regulating the temperature of the extracted air. within a limit allowing the use of conventional fans without modification of their characteristics, by simple creation of an automatic leak upstream of each inlet of the fan box.

Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté au dessin annexé. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments, ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.  Of course, the invention is not limited to the embodiment described and shown in the accompanying drawing. Modifications remain possible, in particular from the point of view of the constitution of the various elements, or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.

Claims (5)

REVENDICATIONS 1. Dispositif de limitation de témpérature pour ventilateur d'installation de ventilation mécanique contrôlée, caractérisé en ce qu'il est essentiellement constitué par un tronçon de conduit (1) à insérer dans le conduit de l'installation de ventilation mécanique en amont du ventilateur, ce tronçon (1) étant pourvu d'une ouverture (2) obturée, en condition normale de fonctionnement, par un volet (3) monté en rotation au moyen d'un axe (4) sur le tronçon de conduit (1) et actionné à l'ouverture, en cas d'élévation anormale de température, par un moyen (5) réagissant à un gradient de température. 1. Temperature limitation device for a ventilator of a controlled mechanical ventilation installation, characterized in that it essentially consists of a section of duct (1) to be inserted into the duct of the mechanical ventilation installation upstream of the ventilator , this section (1) being provided with an opening (2) closed, in normal operating condition, by a flap (3) rotatably mounted by means of an axis (4) on the section of conduit (1) and actuated on opening, in the event of an abnormal rise in temperature, by means (5) reacting to a temperature gradient. 2. Dispositif, suivant la revendication 1, caractérisé en ce que l'ouverture (2) est avantageusement disposée dans la partie inférieure du tronçon (1) et s'étend, de préférence, en direction longitudinale, et le volet (3) est, de préférence, sous forme de deux éléments symétriques par rapport à l'axe de rotation (4), dont l'un s'appuie contre la face intérieure de l'ouverture (2) et dont l'autre s'appuie contre la face extérieure de l'ouverture (2), avec interposition d'un joint périphérique (6). 2. Device according to claim 1, characterized in that the opening (2) is advantageously arranged in the lower part of the section (1) and preferably extends in the longitudinal direction, and the flap (3) is , preferably, in the form of two symmetrical elements with respect to the axis of rotation (4), one of which is pressed against the internal face of the opening (2) and the other of which is pressed against the outer face of the opening (2), with interposition of a peripheral seal (6). 3. Dispositif, suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que le moyen (5) réagissant à un gradient de température est avantageusement constitué par un empilement de bilames fixé à l'intérieur du conduit (I) par l'une de ses extrémités et relié à son autre extrémité, par l'intermédiaire d'une tige de liaison (7) à l'élément du volet (3) s'appuyant contre la face intérieure de l'ouverture (2). 3. Device according to any one of claims 1 and 2, characterized in that the means (5) reacting to a temperature gradient is advantageously constituted by a stack of bimetallic strips fixed inside the conduit (I) by l 'one of its ends and connected to its other end, via a connecting rod (7) to the component of the shutter (3) pressing against the inner face of the opening (2). 4. Dispositif, suivant l'tune quelconque des revendications 1 à 3, caractérisé en ce que l'élément de volet s'appuyant sur la face intérieure de l'ouverture (2) est avantageusement muni d'une masselotte (8).  4. Device according to any one of claims 1 to 3, characterized in that the shutter element resting on the inner face of the opening (2) is advantageously provided with a counterweight (8). 5. Dispositif, suivant la revendication 1, caractérisé en ce que le moyen (5) est constitué sous forme d'un vérin pneumatique, électrique ou autre, dont l'actionnement est commandé par un détecteur de température taré à une valeur prédéterminée.  5. Device according to claim 1, characterized in that the means (5) consists of a pneumatic, electric or other actuator, the actuation of which is controlled by a temperature detector calibrated to a predetermined value.
FR8712851A 1987-09-14 1987-09-14 Temperature-limiting device for a fan of a controlled mechanical ventilation installation Pending FR2620522A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8712851A FR2620522A1 (en) 1987-09-14 1987-09-14 Temperature-limiting device for a fan of a controlled mechanical ventilation installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8712851A FR2620522A1 (en) 1987-09-14 1987-09-14 Temperature-limiting device for a fan of a controlled mechanical ventilation installation

Publications (1)

Publication Number Publication Date
FR2620522A1 true FR2620522A1 (en) 1989-03-17

Family

ID=9354964

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8712851A Pending FR2620522A1 (en) 1987-09-14 1987-09-14 Temperature-limiting device for a fan of a controlled mechanical ventilation installation

Country Status (1)

Country Link
FR (1) FR2620522A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009332A1 (en) * 1993-09-29 1995-04-06 Lunos-Lüftung Gmbh & Co. Ventilatoren Kg Air supply device
FR2776054A1 (en) * 1998-03-13 1999-09-17 Elge Etablissements Grandvuine Building ventilation installation with temperature operated air intake
FR2795459A1 (en) * 1999-06-24 2000-12-29 Aldes Aeraulique Device for cooling of air circulation fan in enclosure, especially in case of fire comprises air-bringing opening blocked by movable valve
FR2835598A1 (en) * 2002-02-04 2003-08-08 Aldes Aeraulique Mechanical ventilation system e.g. for apartment building has pressure detector controlling fan motor speed
FR3050810A1 (en) * 2016-04-28 2017-11-03 France Air VENTILATION DEVICE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410155A1 (en) * 1977-11-24 1979-06-22 Noirats Sarl Usine Hot air extractor system - operates with cold air bleed passing over extractor motor to second exhaust chamber
US4470401A (en) * 1981-05-15 1984-09-11 Newell John H Valve for furnace stack pipe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410155A1 (en) * 1977-11-24 1979-06-22 Noirats Sarl Usine Hot air extractor system - operates with cold air bleed passing over extractor motor to second exhaust chamber
US4470401A (en) * 1981-05-15 1984-09-11 Newell John H Valve for furnace stack pipe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009332A1 (en) * 1993-09-29 1995-04-06 Lunos-Lüftung Gmbh & Co. Ventilatoren Kg Air supply device
FR2776054A1 (en) * 1998-03-13 1999-09-17 Elge Etablissements Grandvuine Building ventilation installation with temperature operated air intake
FR2795459A1 (en) * 1999-06-24 2000-12-29 Aldes Aeraulique Device for cooling of air circulation fan in enclosure, especially in case of fire comprises air-bringing opening blocked by movable valve
FR2835598A1 (en) * 2002-02-04 2003-08-08 Aldes Aeraulique Mechanical ventilation system e.g. for apartment building has pressure detector controlling fan motor speed
FR3050810A1 (en) * 2016-04-28 2017-11-03 France Air VENTILATION DEVICE

Similar Documents

Publication Publication Date Title
EP0058119A1 (en) Vacuum arm in the form of a variable pipe for gaseous media
FR2620522A1 (en) Temperature-limiting device for a fan of a controlled mechanical ventilation installation
FR2480936A1 (en) FLOW ADJUSTMENT APPARATUS, PARTICULARLY FOR LIQUID PIPING
EP2452130B1 (en) Pipe of circular overall cross section, fitted with an airflow rate regulating device
FR3023576A1 (en) ELECTROMECHANICAL ACTUATOR AND DOMOTIC INSTALLATION COMPRISING SUCH AN ELECTROMECHANICAL ACTUATOR
CA1233062A (en) Flow stabilizer for ventilation conduit
CA3050495A1 (en) Adjustable adjustment mechanism from a first extremity and a second extremity of the adjustment mechanism
EP0010202B1 (en) Vacuum operated actuator for an automatic transmission
EP0723065B1 (en) Roller blind equipped with box lead-through
FR2496238A1 (en) Tubular nozzle for ventilation system - has automatically opening shutter regulating temperature using bimetallic strip controlling aperture
FR2892485A1 (en) DEVICE FOR REGULATION AND SEALING ON AN ORIFICE WHICH HAS BEEN OBTURED OR OPEN AS NEEDED
FR2617271A1 (en) Device for setting a mechanically controlled ventilation circuit to atmosphere
FR2521268A1 (en) Multi-blade louvred ventilation aperture - has driving spindle on each blade interlocked outside ventilator casing
FR2478895A1 (en) ELECTRIC MOTOR-REDUCER, IN PARTICULAR FOR THE MECHANIZATION OF DEVICES OF BLINDS AND SHUTTERS WITH A CRANK CONTROL
FR2490321A1 (en) Butterfly valve for boiler flue pipe - has motor control to close valve when boiler is not burning to reduce heat loss
FR2775725A1 (en) Opening and closing control for tipping shutter in cattle breeding building to improve ventilation in the building
FR2549308A1 (en) Automatic winder for electrical lead and for any other similar element.
EP3164548B1 (en) Device for dispensing antifreeze water
EP1722206B1 (en) Movement sensor with adjustable detection zone
FR2754106A1 (en) Improved light display method for car switching unit
CA2029734A1 (en) Floating shaft mounting device, namely of a sensor
FR2800620A1 (en) Ventilation air duct fire-break has cylindrical plug containing section of duct rotating inside housing to interrupt communication
FR2853954A1 (en) Chimney pipe and stove combustion gas exhaust pipe connection covering and protecting device, has cylindrical adapter sleeve reversibly coupled to another cylindrical adapter sleeve and forming housing for exhaust pipe
FR2827664A1 (en) Flow regulator for a ventilation fan, uses supplementary vane inside fan housing which swings between two positions to ensure that the flow regulator components are effective at both high and low flow rates
BE880707A (en) SUNFLOWER BLIND FOR MOTOR VEHICLES