EP0399931B1 - Apparatus for remote control of suction or ventilation system - Google Patents

Apparatus for remote control of suction or ventilation system Download PDF

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Publication number
EP0399931B1
EP0399931B1 EP90420252A EP90420252A EP0399931B1 EP 0399931 B1 EP0399931 B1 EP 0399931B1 EP 90420252 A EP90420252 A EP 90420252A EP 90420252 A EP90420252 A EP 90420252A EP 0399931 B1 EP0399931 B1 EP 0399931B1
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EP
European Patent Office
Prior art keywords
handle
vacuum
pipe
pressure wave
chamber
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
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EP90420252A
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German (de)
French (fr)
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EP0399931A1 (en
Inventor
Patrick Damizet
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D'etude Et De Recherche En Ventilation Et Aeraulique Serva Ste
Aldes Aeraulique SA
Original Assignee
D'etude Et De Recherche En Ventilation Et Aeraulique Serva Ste
Aldes Aeraulique SA
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/38—Built-in suction cleaner installations, i.e. with fixed tube system to which, at different stations, hoses can be connected
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/32—Handles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves

Definitions

  • the invention relates to suction or ventilation installations comprising, a suction box, a motorized suction turbine pneumatically connected to the outlet port of the box and at least one duct, one end of which opens into the box.
  • a suction box a suction box
  • a motorized suction turbine pneumatically connected to the outlet port of the box
  • at least one duct one end of which opens into the box.
  • Such a structure is used in central vacuum systems, on movable vacuum cleaners, of the canister or canister type, in mechanical ventilation systems but also on certain so-called dry or smoke extraction columns.
  • centralized suction installations it is obvious that the invention applies to any installation comprising at least one duct, one of the ends of which is connected to a suction assembly or ventilation.
  • the suction assembly is arranged with its dust container in a technical room and the conduit opening into the box forms part of a network of conduits connecting the central unit to suction sockets arranged in the areas to be cleaned.
  • Each suction outlet is closed by a hinged cover and can receive the rear end of a hose, the front end of which is provided with a handle and is capable of receiving a rigid tubular extension or suction members.
  • the central unit is put into operation and stopped by micro-contacts placed on each outlet and by a low-voltage electrical network connecting each outlet to the central vacuum unit.
  • the introduction by the user of the rear end of the suction hose into one of the sockets triggers the power supply to the electric motor of the central vacuum, while the withdrawal of this end causes the interruption of this diet.
  • Document EP-A-0 156 011 relates to a device for controlling a canister vacuum cleaner, in particular by actuation from the holding handle of the dust suction hose.
  • This device comprises a small duct parallel to the dust suction hose used to convey a pneumatic pressure wave from the handle to the suction group, which causes the turbine to operate when it is stopped, or when it stops.
  • vacuum waves sent into the small duct from the handle allow the suction rate to be adjusted. Given its complexity, such a control device is not applicable to a central vacuum or ventilation installation.
  • the object of the present invention is to remedy these drawbacks by providing a remote control device, for starting and stopping, for a suction or ventilation installation, a device which, simplifying the fitting of the conduits and the flexible structure, simple, reliable, inexpensive and safe for the user.
  • the device according to the invention of the type comprising a box, a motorized suction turbine, pneumatically connected to the outlet orifice of the box, and at least one duct whose downstream end opens into the box, means connected to the upstream end of the duct capable of generating a temporary pneumatic pressure wave in the direction of its downstream end 6a, the latter being associated with means for detecting the pressure wave and reacting on the control unit supply to the electric motor of the suction turbine for putting the installation into operation, is characterized in that the upstream end of the duct is equipped, on the one hand, with means for temporarily producing a pneumatic over-compression constituting a pressure wave and, on the other hand, sealing means during the period of non-operation of the installation and at least during the period of production of the overcompression pne umatic, in that the temporary pneumatic pressure wave is conveyed by the suction pipe itself from its upstream end to its downstream end, this downstream end being equipped, on the one hand, with means for detecting the pressure wave and,
  • the supply of the electric motor to the turbine and the starting of the installation are effected by means of a pressure wave generated upstream of the casing and reaching it by the conduit or the network of conduits.
  • This pressure wave requires no other means than those necessary for the actual operation of the installation and, consequently, constitutes a control means having very little influence on the cost of the installation.
  • the device also comprises, for stopping the installation, on the one hand, means interrupting the suction flow in the duct and, on the other hand, arranged near the box, means detecting the absence of suction flow in this conduit and intervening, with time delay on the control in the direction of opening of the electrical circuit supplying the motor.
  • the means generating the pressure wave consist of a piston which, slidably mounted in the end of the body of the handle, between an anterior stop position and a posterior position work, is formed at the rear end of the front tubular end of the handle, while the detection means are constituted by a pressure switch electrically connected to the motor control circuit and pneumatically on the part of the suction duct leading to the suction box.
  • 2 denotes the casing of a central vacuum unit 1, 3 the electric motor the turbine 4 creating the vacuum in the casing 6a, the downstream end opening into the casing of a network of conduits 6 connected by their upstream ends 6b to the suction outlets distributed in the building and 7 a hose.
  • the front end of the latter is provided with a handle 8 with a front tubular end piece 9 for fixing the suction accessories, with or without extension tube.
  • Its rear end is provided with a nozzle 10 connectable to any one of the suction sockets 11.
  • 12 represents a shutter associated with each of the sockets 11 and capable of sealingly sealing this socket when the nozzle 10 hose 7 is not connected to said socket.
  • this installation is provided with a remote control device ensuring the starting or stopping of the central vacuum unit and reacting on the means controlling the supply of the electric motor 3.
  • the forms of execution shown with reference to FIGS. 1 to 11 all use, as control means for starting up a pneumatic pressure wave generated in the handle 8, and for stopping, a variation in the suction flow rate, all both captured near the central vacuum unit 1.
  • this pressure wave is produced by a piston 13 formed at the rear end of the end piece 9 slidably mounted in the handle body 14. More precisely, this piston is formed by a flap 15 articulated at 16 on the rear end of the end piece 9.
  • the pressure wave does not dilute in the box 2 and can be perfectly detected by a sensitive pressure switch 20, connected by a conduit 22 to the end 6a of the conduit 6.
  • This pressure switch is electrically connected to the control box 23 of the electric motor 3.
  • the pressure wave created at the handle is perceived at the terminal end of the network of conduits 6 and detected by the pressure switch 20 which controls, through the housing 23, the supply of the electric motor 3.
  • the turbine 4 creates, in the box 2, a depression which has the effect of raising the flap 18, as shown in phantom in Figure 1, but also the flap 15 disposed in the handle 8, which therefore allows the installation to operate normally.
  • the installation is shut down by detecting the absence of flow in the hose 7 and in the network of conduits 6 by means an embodiment of which is shown in FIG. 2.
  • the handle 8 is internally provided with an articulated flap or with a closing butterfly 24 which can occupy a position in which it completely releases the suction, and another position in which it completely closes the internal section of the handle 9.
  • This butterfly is controlled from the outside of the handle by a button, not shown. The closure of this butterfly cuts the suction flow and therefore leads to an increase in the vacuum in the box 2. As will be explained below, this increase in vacuum is detected by appropriate means which react on the control unit. 23 to interrupt the supply to the motor 3.
  • the means for detecting the depression in the box 2 are associated with a timer authorizing the opening of the electrical supply circuit of the motor 3 only after a certain time.
  • means detecting the increase in the vacuum in the box to stop the supply of the motor 3 makes it possible to initiate the stopping process by other means than those arranged in the handle 8.
  • C ' is thus that these means can be constituted by the flap 12 associated with each suction outlet 11, shutter which sealingly closes the suction outlet as soon as the rear end piece 10 of the hose is removed from this outlet.
  • the stoppage can also be caused by the voluntary obturation of any of the conduits or the flexible by obturation with the hand, but also by an excessive fouling of the filter 25 placed on the downstream end 6a of the network of conduits, as shown in Figures 1 and 5.
  • the piston 13 formed at the rear end of the end piece 9 slidably mounted in the tubular body 14 of the handle 8 is constituted by a plug 26 formed at the rear end of the nozzle and juxtaposed with an opening 27 produced in this nozzle.
  • the end piece 9 is locked in rotation relative to the body 14, for example by a finger 28 sliding in a groove 29 of the body and is provided with at least one screen 30 ensuring its locking in the stopped position by cooperating with elastic means.
  • these means consist of a ball 32 disposed with its spring 31 in a housing 34 of the body handle.
  • the blocking provided by the notching forces him to exert a greater force on the end piece 9.
  • the nozzle 9 is suddenly moved in the direction of the arrow 17 and thus allows the plug 26, constituting the piston, to expel the air in the tubular body 14 then, by the connector 14a, in the flexible pipe 7.
  • the opening 27 coincides with the outlet of the connector 14a in the body 14 and thus allows the connection of the end piece 9 with the suction flow rate coming from the hose 7.
  • FIG. 6 and 7 differs from that of Figures 3 and 4 in that the flap 15, articulated at 16 at the rear end of the nozzle 9, is secured to a substantially radial finger 15a, suitable for the end of stop travel and the end of start travel to come into contact with abutment faces, respectively 35 and 36 of body 14.
  • the finger 15a meets the stop 35 and forces the flap to pivot in the direction of obturation of the rear end of the end piece 9, while at the end of the start-up stroke, the stop 36 forces this finger to pivot, in the opposite direction, to bring the flap 15 to the open position, completely freeing the rear end of the nozzle 9, in anticipation of the arrival of the suction flow.
  • the handle 8 is composed of a front end 9a with an articulated flap 15, a rear body 14b connected to the hose 7 and a central portion 37 in the form of a bellows and made of less rigid material than those constituting these two other parts.
  • the displacement of the end piece 9a in the direction of the rear part 14b of the handle causes the bellows 37 to deform, and causes a pressure wave reacting on the control means 23, arranged in the control unit.
  • suction 1 As in the embodiment described with reference to FIG. 1, as soon as the hose is traversed by a suction flow, the flap 15 lifts itself by allowing this vacuum to pass through the nozzle 9a and allow the suction.
  • the handle 8 is monolithic, and has a front portion 14c, closed by an articulated flap 38, and a rear portion 14d. This communicates, on the one hand, with the hose 7, and on the other hand, near the part 14c, with the outlet orifice 39 of a turbine 40 with autonomous supply and with start-up control. by button 41 disposed on the handle.
  • the central unit is started up by controlling the rotation of the turbine 40, for a time sufficient to generate, in the part 14d of the handle, a pressure wave.
  • the central vacuum unit causes the flap 38 to be lifted which, in this particular case, closes the outlet port 39 of the turbine 40 to avoid fouling of the turbine by dust.
  • the turbine is replaced by a bulb, a bellows or other equivalent means which, under manual pressure, sends a pneumatic pressure wave into the handle.
  • the embodiment shown in Figure 10 differs from that shown in Figures 3 and 4 by the shape of the means ensuring the blocking of the piston 13 in the stopped position.
  • the plug 26 forming a piston 13 and formed at the end of the end piece 9 is shouldered at 42 to form a bearing face for a compression spring 43 interposed between it and the front end 14e of the handle body 14.
  • An eclipsable stop 44 constituted for example by an articulated lever, immobilizes the piston 26 in the stopped position, position in which, as shown in FIG. 10, it compresses the spring 43.
  • FIG. 5 shows an embodiment of the means arranged on the central unit for closing and opening the electrical supply circuit of the electric motor 3.
  • 51 and 52 designating the supply conductors by the sector , 53 and 54 the supply conductors of the electric motor 3, 55 and 56 the conductors of the control circuit.
  • the pressure switch 20 cooperates with a microswitch 57 connected to the circuit 55-56 and controlling the supply of a remote control switch 48 mounted on the supply circuit 53 of the motor 3.
  • On the circuit 56-55 is also connected a contact 59 actuable by a device 60 detecting the absence of flow in the network of conduits 6-5.
  • this device consists of a cylindrical body 61 in the shape of a bell, the bottom of which communicates through a calibrated orifice 62 with the inside of the box 2 of the central vacuum unit.
  • a drawer 63 is slidably mounted with sealing in the body 61. It has an internal axial bore 64 serving as a housing for a return spring 65 working in compression and interposed between it and the body 61.
  • this drawer is integral with a external shoulder with abutment face 66 capable of cooperating with the aforementioned contact 59.
  • the device is associated with time delay means.
  • these means consist of the orifice 62, the section of which is determined in order to create a pressure drop increasing the duration taking into account in the body 61 of the increase in depression in the tank 2.
  • the head of the drawer 63 is traversed by a channel 68 placing the interior of the cylindrical body 61 in communication with the exterior.
  • This channel is closed, at the outlet of the drawer, by a flap 69.
  • This arrangement makes it possible to use the drawer as a control member and for switching the central unit on and off. To start manually, simply push the drawer in the direction of arrow 67. Under the effect of this displacement, the air contained in the body 61 and which is compressed in this body due to the small cross-section of the orifice 62 can escape to the outside via the conduit 68 by lifting the valve 69.
  • an elastic return flap 70 is articulated on the central unit casing and cooperates with contact 71 of a relay arranged on a circuit not shown, comprising an electronic unit with time delay, and constituting a control unit.
  • the flap 70 is raised by the pressure of the outgoing air.
  • the shutter pivots while tending to close the outlet orifice, and releases the contact 71. This change of state of the contact causes, with time delay, the shutdown of the central vacuum unit 1.
  • FIG. 11 shows, in other embodiments, means for detecting the pressure wave and means for detecting the increase in depression.
  • the means detecting the pressure wave are constituted by a motion sensor 73 of magnetic or other type, arranged in the vicinity of the end of an articulated flap 18.
  • a motion sensor 73 of magnetic or other type arranged in the vicinity of the end of an articulated flap 18.
  • Such a flap with its sensor 73 can also be disposed on a conduit leaving in derivation from the downstream end 6a of the conduit 6.
  • the means for detecting the increase in vacuum in the box 2 are constituted by a depressostat 74 which is electrically connected to the motor control circuit 3.
  • This depressostat is pneumatically connected by a conduit 75 to the box 2 with interposition of on the one hand a throttle nozzle 76 and, on the other hand, an intermediate delay chamber 77.
  • the transmission of this growth is transmitted to the depressostat 74 with a delay which depends on the section of the nozzle 76 and on the air volume of the chamber 77 and which ensures the desired time delay. .
  • control device described above in the case of its application to a central vacuum system can also be applied, in one or the other or in two of its start and stop functions, to movable vacuum cleaners, canister type, canister, or other, to mechanical ventilation installations, and to smoke extraction installations.
  • the means generating the pressure wave and those interrupting the suction flow are not arranged in the handle of a suction hose, but in a tubular body connected or connectable to a socket disposed on a duct, or a network of ducts and, upstream of the suction box.

Abstract

This apparatus is of the type comprising box 2, a motorized suction turbine 4, connected pneumatically to the outlet orifice 2b of the box, and at least one pipe 6 whose downstream end 6a opens into the box 2, means 13-40 connected to the upstream end 6b of the pipe 6 which are capable of generating a temporary pneumatic pressure wave in the direction of its downstream end 6a, the latter being coupled with means 20-22 of detecting the pressure wave and of reacting on the control unit 23 of the power supply of the electric motor 3 of the suction turbine 4 for putting the installation into operation. <??>According to the invention, the pneumatic pressure wave is carried by the pipe 6 itself from its upstream end 6b to its downstream end 6a, this downstream end being fitted with a closing valve 18, normally kept in the closed position and capable of releasing the opening of the pipe under the effect of the suctional reduced pressure. <IMAGE>

Description

L'invention est relative aux installations d'aspiration ou de ventilation comprenant, un caisson d'aspiration, une turbine d'aspiration motorisée raccordée pneumatiquement à l'orifice de sortie du caisson et au moins un conduit dont l'une des extrémités débouche dans le caisson. Une telle structure est utilisée dans les installations d'aspiration centralisée, sur les aspirateurs déplaçables, de type traineau ou bidon, dans les installations de ventilation mécanique mais aussi sur certaines colonnes dites sèches ou de désemfumage. Pour simplifier la description, il va être fait référence aux installations d'aspiration centralisée mais il est évident que l'invention s'applique à toute installation comportant au moins un conduit dont l'une des extrémités est raccordée à un ensemble d'aspiration ou de ventilation.The invention relates to suction or ventilation installations comprising, a suction box, a motorized suction turbine pneumatically connected to the outlet port of the box and at least one duct, one end of which opens into the box. Such a structure is used in central vacuum systems, on movable vacuum cleaners, of the canister or canister type, in mechanical ventilation systems but also on certain so-called dry or smoke extraction columns. To simplify the description, reference will be made to centralized suction installations but it is obvious that the invention applies to any installation comprising at least one duct, one of the ends of which is connected to a suction assembly or ventilation.

Dans de telles installations d'aspiration centralisée, l'ensemble d'aspiration est disposé avec son réservoir à poussière dans un local technique et le conduit débouchant dans le caisson fait partie d'un réseau de conduits reliant la centrale à des prises d'aspiration disposées dans les zones à nettoyer. Chaque prise d'aspiration est obturée par un couvercle articulé et peut recevoir l'embout postérieur d'un flexible dont l'embout antérieur muni d'une poignée est apte à recevoir une rallonge tubulaire rigide ou des organes d'aspiration.In such centralized suction installations, the suction assembly is arranged with its dust container in a technical room and the conduit opening into the box forms part of a network of conduits connecting the central unit to suction sockets arranged in the areas to be cleaned. Each suction outlet is closed by a hinged cover and can receive the rear end of a hose, the front end of which is provided with a handle and is capable of receiving a rigid tubular extension or suction members.

Dans la plupart des installations actuelles, la mise en fonctionnement et l'arrêt de la centrale sont effectués par des micro-contacts disposés sur chaque prise et par un réseau électrique basse tension reliant chaque prise à la centrale d'aspiration. Ainsi, l'introduction par l'utilisateur de l'embout postérieur du flexible d'aspiration dans l'une des prises déclenche l'alimentation du moteur électrique de la centrale d'aspiration, tandis que le retrait de cet embout provoque l'interruption de cette alimentation.In most current installations, the central unit is put into operation and stopped by micro-contacts placed on each outlet and by a low-voltage electrical network connecting each outlet to the central vacuum unit. Thus, the introduction by the user of the rear end of the suction hose into one of the sockets triggers the power supply to the electric motor of the central vacuum, while the withdrawal of this end causes the interruption of this diet.

Que le réseau électrique basse tension, soit posé à côté des canalisations d'aspiration ou inclu dans ces canalisations, il exige toujours un temps de pose long, auquel s'ajoute le temps de connection des prises et le temps de vérification des liaisons électriques. Il en résulte que ce mode de commande conduit à un coût d'installation assez élevé, auquel s'ajoute le coût du matériel électrique installé comprenant un transformateur, des relais sur la centrale de commande et les divers contacts sur les prises d'aspiration. Un autre inconvénient de ce type de commande provient de la nécessité de débrancher le flexible pour obtenir l'ouverture du circuit de commande et l'arrêt de la centrale d'aspiration.Whether the low voltage electrical network is placed next to the suction pipes or included in these pipes, it always requires a long exposure time, to which is added the connection time for the sockets and the time for checking the electrical connections. As a result, this control mode leads to a fairly high installation cost, to which is added the cost of the installed electrical equipment comprising a transformer, relays on the control unit and the various contacts. on the suction ports. Another drawback of this type of control comes from the need to disconnect the hose to obtain the opening of the control circuit and the shutdown of the central vacuum unit.

On connaît par ailleurs, quelques types d'installations comportant un bouton marche-arrêt sur la poignée du flexible grâce à l'intégration de conducteurs électriques dans ce flexible. Toutefois, de tels flexibles sont peu utilisés car plus lourds et encore plus onéreux que ceux traditionnels.We also know, some types of installations comprising an on / off button on the handle of the flexible thanks to the integration of electrical conductors in this flexible. However, such hoses are little used because they are heavier and even more expensive than traditional ones.

La même solution pour commander à distance le fonctionnement de l'ensemble d'aspiration est prévue sur certains aspirateurs déplaçables. Là aussi, elle conduit à un surcoût non négligeable et à un accroissement du poids.The same solution for remotely controlling the operation of the suction assembly is provided on certain movable vacuum cleaners. Here too, it leads to a non-negligible additional cost and an increase in weight.

Les documents US-A-3 669 145 et GB-A-2 015 652 décrivent chacun un dispositif d'aspiration centralisé comprenant une turbine principale d'aspiration et un système fournissant une dépression secondaire en période de non fonctionnement de la turbine. L'ouverture d'un volet de branchement d'un flexible d'aspiration sur l'installation modifie la valeur de la dépression ce qui fournit une information pneumatique provoquant la mise en fonctionnement de la turbine principale d'aspiration.The documents US-A-3,669,145 and GB-A-2,015,652 each describe a centralized suction device comprising a main suction turbine and a system providing a secondary vacuum during the non-operation of the turbine. Opening a suction hose connection flap on the installation changes the value of the vacuum, which provides pneumatic information causing the main suction turbine to start operating.

Le document EP-A-0 156 011 concerne un dispositif de commande d'un aspirateur traîneau notamment par actionnement depuis la poignée de tenue du flexible d'aspiration des poussières. Ce dispositif comprend un petit conduit parallèle au flexible d'aspiration des poussières servant à véhiculer une onde de pression pneumatique depuis la poignée jusqu'au groupe d'aspiration, qui provoque la mise en fonctionnement de la turbine lorsque celle-ci est arrêtée, ou son arrêt lorsque celle-ci fonctionne. En outre, des ondes de dépression envoyées dans le petit conduit, depuis la poignée, permettent de régler le débit d'aspiration. Compte tenu de sa complexité, un tel dispositif de commande n'est pas applicable à une installation d'aspiration centralisée ou de ventilation.Document EP-A-0 156 011 relates to a device for controlling a canister vacuum cleaner, in particular by actuation from the holding handle of the dust suction hose. This device comprises a small duct parallel to the dust suction hose used to convey a pneumatic pressure wave from the handle to the suction group, which causes the turbine to operate when it is stopped, or when it stops. In addition, vacuum waves sent into the small duct from the handle allow the suction rate to be adjusted. Given its complexity, such a control device is not applicable to a central vacuum or ventilation installation.

La présente invention a pour but de remédier à ces inconvénients en fournissant un dispositif de commande à distance, de la mise en marche et de l'arrêt, pour une installation d'aspiration ou de ventilation, dispositif qui, simplifiant la pose du ou des conduits et la structure du flexible, soit simple, fiable, peu onéreux et sans danger pour l'utilisateur.The object of the present invention is to remedy these drawbacks by providing a remote control device, for starting and stopping, for a suction or ventilation installation, a device which, simplifying the fitting of the conduits and the flexible structure, simple, reliable, inexpensive and safe for the user.

A cet effet, le dispositif selon l'invention, du type comportant un caisson, une turbine d'aspiration motorisée, raccordée pneumatiquement à l'orifice de sortie du caisson, et au moins un conduit dont l'extrémité aval débouche dans le caisson, des moyens raccordés à l'extrémité amont du conduit aptes à générer une onde de pression pneumatique temporaire en direction de son extrémité aval 6a, cette dernière étant associée à des moyens pour détecter l'onde de pression et réagir sur le boîtier de commande d'alimentation du moteur électrique de la turbine d'aspiration pour la mise en fonctionnement de l'installation, est caractérisé en ce que l'extrémité amont du conduit est équipée, d'une part, de moyens pour produire temporairement une surcompression pneumatique constitutive d'une onde de pression et, d'autre part, des moyens d'obturation en période de non fonctionnement de l'installation et au moins pendant la période de production de la surcompression pneumatique, en ce que l'onde de pression pneumatique temporaire est véhiculée par le conduit d'aspiration lui-même de son extrémité amont à son extrémité aval, cette extrémité aval étant équipée, d'une part, de moyens de détection de l'onde de pression et, d'autre part, d'un volet d'obturation, monté pivotant, maintenu en position de fermeture par un ressort et apte à basculer pour dégager l'ouverture du conduit sous l'effet de la dépression d'aspiration.To this end, the device according to the invention, of the type comprising a box, a motorized suction turbine, pneumatically connected to the outlet orifice of the box, and at least one duct whose downstream end opens into the box, means connected to the upstream end of the duct capable of generating a temporary pneumatic pressure wave in the direction of its downstream end 6a, the latter being associated with means for detecting the pressure wave and reacting on the control unit supply to the electric motor of the suction turbine for putting the installation into operation, is characterized in that the upstream end of the duct is equipped, on the one hand, with means for temporarily producing a pneumatic over-compression constituting a pressure wave and, on the other hand, sealing means during the period of non-operation of the installation and at least during the period of production of the overcompression pne umatic, in that the temporary pneumatic pressure wave is conveyed by the suction pipe itself from its upstream end to its downstream end, this downstream end being equipped, on the one hand, with means for detecting the pressure wave and, on the other hand, a shutter, pivotally mounted, held in the closed position by a spring and capable of tilting to release the opening of the duct under the effect of the suction depression .

Ainsi, l'alimentation du moteur électrique de la turbine et la mise en marche de l'installation s'effectuent au moyen d'une onde de pression générée en amont du caisson et parvenant à lui par le conduit ou le réseau de conduits. Cette onde de pression n'exige aucun autre moyen que ceux nécessaires au fonctionnement même de l'installation et, en conséquence, constitue un moyen de commande influant très peu sur le coût de l'installation.Thus, the supply of the electric motor to the turbine and the starting of the installation are effected by means of a pressure wave generated upstream of the casing and reaching it by the conduit or the network of conduits. This pressure wave requires no other means than those necessary for the actual operation of the installation and, consequently, constitutes a control means having very little influence on the cost of the installation.

Avantageusement, le dispositif comprend aussi pour l'arrêt de l'installation, d'une part, des moyens interrompant le débit d'aspiration dans le conduit et, d'autre part, disposés à proximité du caisson, des moyens détectant l'absence de débit d'aspiration dans ce conduit et intervenant, avec temporisation sur la commande dans le sens de l'ouverture du circuit électrique d'alimentation du moteur.Advantageously, the device also comprises, for stopping the installation, on the one hand, means interrupting the suction flow in the duct and, on the other hand, arranged near the box, means detecting the absence of suction flow in this conduit and intervening, with time delay on the control in the direction of opening of the electrical circuit supplying the motor.

Dans une forme d'exécution de l'invention, les moyens générant l'onde de pression sont constitués par un piston qui, monté coulissant dans l'extrémité du corps de la poignée, entre une position antérieure d'arrêt et une position postérieure de travail, est formé à l'extrémité postérieure de l'embout tubulaire antérieur de la poignée, tandis que les moyens de détection sont constitués par un pressostat raccordé, électriquement, au circuit de commande du moteur et pneumatiquement sur la partie du conduit d'aspiration aboutissant au caisson d'aspiration.In one embodiment of the invention, the means generating the pressure wave consist of a piston which, slidably mounted in the end of the body of the handle, between an anterior stop position and a posterior position work, is formed at the rear end of the front tubular end of the handle, while the detection means are constituted by a pressure switch electrically connected to the motor control circuit and pneumatically on the part of the suction duct leading to the suction box.

Pour mettre en marche la centrale d'aspiration avec ce dispositif, il suffit de déplacer relativement l'embout par rapport à la poignée afin que, sous l'action de ce déplacement, l'air contenu dans le corps de la poignée soit chassé en direction de la centrale en créant une onde de pression temporaire dont la détection par le pressostat déclenche l'alimentation du moteur électrique de la turbine.To start the central vacuum unit with this device, it suffices to relatively move the nozzle relative to the handle so that, under the action of this displacement, the air contained in the body of the handle is expelled in central management by creating a wave of temporary pressure, the detection of which by the pressure switch triggers the supply of the turbine's electric motor.

D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, plusieurs formes d'exécution de ce dispositif dans le cas de son application à une installation d'aspiration centralisée.

  • Figure 1 est une vue de côté, avec coupe partielle représentant de façon schématique une première forme d'exécution du dispositif selon l'invention,
  • Figure 2 est une vue partielle avec coupe partielle de l'embout antérieur du flexible montrant une forme d'exécution des moyens d'arrêt de la centrale d'aspiration.
  • Figures 3 et 4 sont des vues partielles de côté, en coupe transversale, montrant une autre forme d'exécution de la poignée lorsqu'elle est respectivement en position d'arrêt et en position de marche,
  • Figure 5 est une vue schématique de côté en coupe transversale de la centrale montrant aussi une forme d'exécution des moyens de commande de l'alimentation de son moteur d'entrainement,
  • Figures 6 et 7 sont des vues partielles, de côté en coupe transversale montrant une variante de réalisation de la poignée, lorsqu'elle est, respectivement, en position arrêt et en position de marche,
  • Figures 8, 9 et 10 sont des vues partielles de côté en coupe transversale montrant trois autres formes d'exécution de la poignée,
  • Figure 11 est une vue schématique de côté en coude transversale montrant une variante de réalisation des moyens de détection de la variation de la dépression.
Other characteristics and advantages will emerge from the description which follows with reference to the appended schematic drawing representing, by way of nonlimiting examples, several embodiments of this device in the case of its application to a centralized suction installation.
  • FIG. 1 is a side view, with partial section schematically representing a first embodiment of the device according to the invention,
  • Figure 2 is a partial view with partial section of the front end of the hose showing an embodiment of the stop means of the central vacuum.
  • FIGS. 3 and 4 are partial side views, in cross section, showing another embodiment of the handle when it is respectively in the off position and in the on position,
  • FIG. 5 is a schematic side view in transverse section of the power station also showing an embodiment of the means for controlling the supply of its drive motor,
  • FIGS. 6 and 7 are partial side views in cross section showing an alternative embodiment of the handle, when it is respectively in the off position and in the on position,
  • Figures 8, 9 and 10 are partial side views in cross section showing three other embodiments of the handle,
  • Figure 11 is a schematic side view in transverse bend showing an alternative embodiment of the means for detecting the variation in depression.

Dans ces dessins, 2 désigne le caisson d'une centrale d'aspiration 1, 3 le moteur électrique la turbine 4 créant la dépression dans le caisson 6a, l'extrémité aval débouchant dans le caisson d'un réseau de conduits 6 raccordés par leurs extrémités amont 6b aux prises d'aspiration réparties dans le bâtiment et 7 un flexible. L'extrémité antérieure de ce dernier est munie d'une poignée 8 avec un embout tubulaire antérieur 9 pour fixation des accessoires d'aspiration, avec ou sans tube rallonge. Son extrémité postérieure est munie d'un embout 10 raccordable à l'une quelconque des prises d'aspiration 11. 12 représente un volet d'obturation associé à chacune des prises 11 et apte à obturer de manière étanche cette prise lorsque l'embout 10 du flexible 7 n'est pas connecté à ladite prise.In these drawings, 2 denotes the casing of a central vacuum unit 1, 3 the electric motor the turbine 4 creating the vacuum in the casing 6a, the downstream end opening into the casing of a network of conduits 6 connected by their upstream ends 6b to the suction outlets distributed in the building and 7 a hose. The front end of the latter is provided with a handle 8 with a front tubular end piece 9 for fixing the suction accessories, with or without extension tube. Its rear end is provided with a nozzle 10 connectable to any one of the suction sockets 11. 12 represents a shutter associated with each of the sockets 11 and capable of sealingly sealing this socket when the nozzle 10 hose 7 is not connected to said socket.

Selon l'invention, cette installation est munie d'un dispositif de commande à distance assurant la mise en marche ou l'arrêt de la centrale d'aspiration et réagissant sur les moyens commandant l'alimentation du moteur électrique 3. Les formes d'exécution représentées en référence aux figures 1 à 11 mettent, toutes en oeuvre, comme moyens de commande pour la mise en marche une onde de pression pneumatique générée dans la poignée 8, et pour l'arrêt, une variation du débit d'aspiration, toutes les deux captées à proximité de la centrale d'aspiration 1.According to the invention, this installation is provided with a remote control device ensuring the starting or stopping of the central vacuum unit and reacting on the means controlling the supply of the electric motor 3. The forms of execution shown with reference to FIGS. 1 to 11 all use, as control means for starting up a pneumatic pressure wave generated in the handle 8, and for stopping, a variation in the suction flow rate, all both captured near the central vacuum unit 1.

Dans la forme d'exécution représentée à la figure 1, cette onde de pression est produite par un piston 13 formé à l'extrémité postérieure de l'embout 9 monté coulissant dans le corps de poignée 14. Plus précisément, ce piston est formé par un volet 15 articulé en 16 sur l'extrémité postérieure de l'embout 9.In the embodiment shown in FIG. 1, this pressure wave is produced by a piston 13 formed at the rear end of the end piece 9 slidably mounted in the handle body 14. More precisely, this piston is formed by a flap 15 articulated at 16 on the rear end of the end piece 9.

On conçoit aisément qu'en déplaçant brusquement, dans le sens de la flèche 17, l'embout 9 dans le corps 14 de la poignée 8, le volet 15 reste plaqué sur l'extrémité de l'embout, forme piston et chasse devant lui l'air en créant une onde de pression. Celle-ci véhiculée par le flexible 7 puis par les conduits 6 parvient à l'extrémité 6a du conduit débouchant dans le caisson 2 de la centrale d'aspiration 1. Comme le montre la figure 1, l'extrémité aval 6a du conduit est obturée par un volet 18 articulé en 19 et associé à un ressort de plaquage 21 taré pour permettre le soulèvement du volet 18 sous la dépression de fonctionnement du caisson 2.It is easy to see that by suddenly moving, in the direction of arrow 17, the end piece 9 in the body 14 of the handle 8, the flap 15 remains pressed against the end of the end piece, forms a piston and drives out in front of it air by creating a pressure wave. The latter conveyed by the hose 7 then by the conduits 6 reaches the end 6a of the conduit opening into the box 2 of the central vacuum cleaner 1. As shown in FIG. 1, the downstream end 6a of the conduit is closed by a flap 18 articulated in 19 and associated with a setting spring 21 calibrated to allow the lifting of the flap 18 under the operating vacuum of the box 2.

Grâce à ce volet 18, l'onde de pression ne se dilue pas dans le caisson 2 et peut être parfaitement détectée par un pressostat sensible 20, relié par un conduit 22 à l'extrémité 6a du conduit 6. Ce pressostat est relié électriquement au boitier de commande 23 du moteur électrique 3.Thanks to this flap 18, the pressure wave does not dilute in the box 2 and can be perfectly detected by a sensitive pressure switch 20, connected by a conduit 22 to the end 6a of the conduit 6. This pressure switch is electrically connected to the control box 23 of the electric motor 3.

Ainsi, l'onde de pression créée au niveau de la poignée est perçue à l'extrémité terminale du réseau de conduits 6 et détectée par le pressostat 20 qui commande, à travers le boitier 23, l'alimentation du moteur électrique 3. Dès que le moteur est alimenté, la turbine 4 crée, dans le caisson 2, une dépression qui a pour effet de soulever le volet 18, comme représenté en traits mixtes à la figure 1, mais aussi le volet 15 disposé dans la poignée 8, ce qui permet donc à l'installation de fonctionner normalement.Thus, the pressure wave created at the handle is perceived at the terminal end of the network of conduits 6 and detected by the pressure switch 20 which controls, through the housing 23, the supply of the electric motor 3. As soon as the engine is powered, the turbine 4 creates, in the box 2, a depression which has the effect of raising the flap 18, as shown in phantom in Figure 1, but also the flap 15 disposed in the handle 8, which therefore allows the installation to operate normally.

L'arrêt de l'installation est assuré par détection de l'absence de débit dans le flexible 7 et dans le réseau de conduits 6 par des moyens dont une forme d'exécution est représentée à la figure 2. Dans ce cas, la poignée 8 est munie intérieurement d'un volet articulé ou d'un papillon de fermeture 24 pouvant occuper une position dans laquelle il dégage totalement l'aspiration, et une autre position dans laquelle il obture totalement la section interne de la poignée 9. Ce papillon est commandé par l'extérieur de la poignée par un bouton, non représenté. La fermeture de ce papillon coupe le débit d'aspiration et conduit donc à une augmentation de la dépression dans le caisson 2. Comme cela sera précisé plus loin, cette augmentation de la dépression est détectée par des moyens appropriés qui réagissent sur le boitier de commande 23 pour interrompre l'alimentation du moteur 3. Pour éviter l'arrêt du moteur suite à un blocage temporaire de l'aspiration, par exemple, par obturation intempestive de l'organe d'aspiration fixé à l'extrémité de l'embout 9, les moyens de détection de la dépression dans le caisson 2 sont associés à un temporisateur n'autorisant l'ouverture du circuit électrique d'alimentation du moteur 3 qu'après certain temps.The installation is shut down by detecting the absence of flow in the hose 7 and in the network of conduits 6 by means an embodiment of which is shown in FIG. 2. In this case, the handle 8 is internally provided with an articulated flap or with a closing butterfly 24 which can occupy a position in which it completely releases the suction, and another position in which it completely closes the internal section of the handle 9. This butterfly is controlled from the outside of the handle by a button, not shown. The closure of this butterfly cuts the suction flow and therefore leads to an increase in the vacuum in the box 2. As will be explained below, this increase in vacuum is detected by appropriate means which react on the control unit. 23 to interrupt the supply to the motor 3. To avoid stopping the motor following a temporary blockage of the suction, for example, by untimely shutting off of the suction member fixed to the end of the nozzle 9 , the means for detecting the depression in the box 2 are associated with a timer authorizing the opening of the electrical supply circuit of the motor 3 only after a certain time.

Il faut noter que le recours à des moyens détectant l'augmentation de la dépression dans le caisson pour arrêter l'alimentation du moteur 3 permet d'enclencher le processus d'arrêt par d'autres moyens que ceux disposés dans la poignée 8. C'est ainsi que ces moyens peuvent être constitués par le volet 12 associé à chaque prise d'aspiration 11, volet qui obture de façon étanche la prise d'aspiration dès que l'embout postérieur 10 du flexible est retiré de cette prise. L'arrêt peut aussi être provoqué par l'obturation volontaire de l'un quelconque des conduits ou du flexible par obturation avec la main, mais aussi par un encrassement excessif du filtre 25 disposé sur l'extrémité aval 6a du réseau de conduits, comme montré aux figures 1 et 5.It should be noted that the use of means detecting the increase in the vacuum in the box to stop the supply of the motor 3 makes it possible to initiate the stopping process by other means than those arranged in the handle 8. C 'is thus that these means can be constituted by the flap 12 associated with each suction outlet 11, shutter which sealingly closes the suction outlet as soon as the rear end piece 10 of the hose is removed from this outlet. The stoppage can also be caused by the voluntary obturation of any of the conduits or the flexible by obturation with the hand, but also by an excessive fouling of the filter 25 placed on the downstream end 6a of the network of conduits, as shown in Figures 1 and 5.

Dans la forme d'exécution représentée aux figures 3 et 4, le piston 13 ménagé à l'extrémité postérieure de l'embout 9 monté coulissant dans le corps tubulaire 14 de la poignée 8 est constitué par un bouchon 26 formé à l'extrémité postérieure de l'embout et juxtaposé à une ouverture 27 réalisée dans cet embout. L'embout 9 est calé en rotation par rapport au corps 14, par exemple par un doigt 28 coulissant dans une rainure 29 du corps et est muni au moins d'un écran 30 assurant son verrouillage en position arrêt en coopérant avec des moyens élastiques. Dans la forme d'exécution représentée, ces moyens sont constitués par une bille 32 disposée avec son ressort 31 dans un logement 34 du corps de poignée.In the embodiment shown in Figures 3 and 4, the piston 13 formed at the rear end of the end piece 9 slidably mounted in the tubular body 14 of the handle 8 is constituted by a plug 26 formed at the rear end of the nozzle and juxtaposed with an opening 27 produced in this nozzle. The end piece 9 is locked in rotation relative to the body 14, for example by a finger 28 sliding in a groove 29 of the body and is provided with at least one screen 30 ensuring its locking in the stopped position by cooperating with elastic means. In the embodiment shown, these means consist of a ball 32 disposed with its spring 31 in a housing 34 of the body handle.

Grâce à cet agencement, lorsque l'utilisateur veut mettre en route l'installation, le blocage procuré par le crantage, l'oblige à exercer un effort plus important sur l'embout 9. Dès que le cran 30 échappe du dispositif de verrouillage, l'embout 9 est déplacé brutalement dans le sens de la flèche 17 et permet ainsi au bouchon 26, constituant piston, de chasser l'air dans le corps tubulaire 14 puis, par le raccord 14a, dans le tuyau flexible 7. En fin de mouvement, comme montré à la figure 4, l'ouverture 27 coïncide avec le débouché du raccord 14a dans le corps 14 et permet ainsi la mise en communication de l'embout 9 avec le débit d'aspiration provenant du flexible 7.Thanks to this arrangement, when the user wants to start the installation, the blocking provided by the notching, forces him to exert a greater force on the end piece 9. As soon as the notch 30 escapes from the locking device, the nozzle 9 is suddenly moved in the direction of the arrow 17 and thus allows the plug 26, constituting the piston, to expel the air in the tubular body 14 then, by the connector 14a, in the flexible pipe 7. At the end of movement, as shown in FIG. 4, the opening 27 coincides with the outlet of the connector 14a in the body 14 and thus allows the connection of the end piece 9 with the suction flow rate coming from the hose 7.

Pour arrêter l'installation, avec ce dispositif, il suffit de ramener l'embout dans sa position d'arrêt, dans laquelle le piston 26 constitue moyen d'obturation et s'oppose au passage du débit d'aspiration, ce qui provoque l'arrêt de l'installation.To stop the installation, with this device, it suffices to return the endpiece to its stopped position, in which the piston 26 constitutes a means of obturation and opposes the passage of the suction flow, which causes the installation stopped.

La forme d'exécution représentée aux figures 6 et 7 se différencie de celle des figures 3 et 4 par le fait que le volet 15, articulé en 16 à l'extrémité postérieure de l'embout 9, est solidaire d'un doigt sensiblement radial 15a, apte en fin de course d'arrêt et en fin de course de mise en marche à venir en contact avec des faces de butée, respectivement 35 et 36 du corps 14. Ainsi, en fin de course d'arrêt et avant le verrouillage, le doigt 15a rencontre la butée 35 et oblige le volet à pivoter dans le sens de l'obturation de l'extrémité postérieure de l'embout 9, tandis qu'en fin de course de mise en marche, la butée 36 oblige ce doigt à pivoter, en sens inverse, pour amener le volet 15 en position d'ouverture, en dégageant totalement l'extrémité postérieure de l'embout 9, en prévision de l'arrivée du débit d'aspiration.The embodiment shown in Figures 6 and 7 differs from that of Figures 3 and 4 in that the flap 15, articulated at 16 at the rear end of the nozzle 9, is secured to a substantially radial finger 15a, suitable for the end of stop travel and the end of start travel to come into contact with abutment faces, respectively 35 and 36 of body 14. Thus, at the end of stop travel and before locking , the finger 15a meets the stop 35 and forces the flap to pivot in the direction of obturation of the rear end of the end piece 9, while at the end of the start-up stroke, the stop 36 forces this finger to pivot, in the opposite direction, to bring the flap 15 to the open position, completely freeing the rear end of the nozzle 9, in anticipation of the arrival of the suction flow.

Dans la forme d'exécution représentée à la figure 8, la poignée 8 est composée d'un embout antérieur 9a avec un volet articulé 15, d'un corps postérieur 14b raccordé au flexible 7 et d'une partie centrale 37 en forme de soufflet et réalisée en matériau moins rigide que ceux constituant ces deux autres parties. Avec ce type de poignée, le déplacement de l'embout 9a en direction de la partie postérieure 14b de la poignée entraine la déformation du soufflet 37, et provoque une onde de pression réagissant sur les moyens de commande 23, disposés dans la centrale d'aspiration 1. Comme dans la forme d'exécution décrite en référence à la figure 1, dès que le flexible est parcouru par un débit d'aspiration, le volet 15 se souleve de lui-même en permettant à cette dépression de traverser l'embout 9a et de permettre l'aspiration.In the embodiment shown in Figure 8, the handle 8 is composed of a front end 9a with an articulated flap 15, a rear body 14b connected to the hose 7 and a central portion 37 in the form of a bellows and made of less rigid material than those constituting these two other parts. With this type of handle, the displacement of the end piece 9a in the direction of the rear part 14b of the handle causes the bellows 37 to deform, and causes a pressure wave reacting on the control means 23, arranged in the control unit. suction 1. As in the embodiment described with reference to FIG. 1, as soon as the hose is traversed by a suction flow, the flap 15 lifts itself by allowing this vacuum to pass through the nozzle 9a and allow the suction.

Dans la forme d'exécution représentée à la figure 9, la poignée 8 est monolithique, et comporte une partie antérieure 14c, obturée par un volet articulé 38, et une partie postérieure 14d. Celle-ci communique, d'une part, avec le flexible 7, et d'autre part , à proximité de la partie 14c, avec l'orifice de sortie 39 d'une turbine 40 à alimentation autonome et à commande de mise en marche par bouton 41 disposé sur la poignée. Lorsque le flexible 7 est connecté à une prise d'aspiration, la mise en marche de la centrale s'effectue en commandant la mise en rotation de la turbine 40, pendant un temps suffisant pour générer, dans la partie 14d de la poignée, une onde de pression. Comme dans les formes d'exécution précédentes, dès que la centrale d'aspiration est mise en route, la dépression provoque le soulèvement du volet 38 qui, dans ce cas particulier, vient obturer l'orifice 39 de sortie de la turbine 40 pour éviter l'encrassement de la turbine par les poussières.In the embodiment shown in Figure 9, the handle 8 is monolithic, and has a front portion 14c, closed by an articulated flap 38, and a rear portion 14d. This communicates, on the one hand, with the hose 7, and on the other hand, near the part 14c, with the outlet orifice 39 of a turbine 40 with autonomous supply and with start-up control. by button 41 disposed on the handle. When the hose 7 is connected to a suction outlet, the central unit is started up by controlling the rotation of the turbine 40, for a time sufficient to generate, in the part 14d of the handle, a pressure wave. As in the previous embodiments, as soon as the central vacuum unit is started, the vacuum causes the flap 38 to be lifted which, in this particular case, closes the outlet port 39 of the turbine 40 to avoid fouling of the turbine by dust.

Dans une variante, la turbine est remplacée par une poire, un soufflet ou autre moyen équivalent pouvant, sous une pression manuelle, envoyer dans la poignée une onde de pression pneumatique.Alternatively, the turbine is replaced by a bulb, a bellows or other equivalent means which, under manual pressure, sends a pneumatic pressure wave into the handle.

La forme d'exécution représentée à la figure 10, se différencie de celle représentée aux figures 3 et 4 par la forme des moyens assurant le blocage du piston 13 en position d'arrêt. En effet, le bouchon 26 formant piston 13 et ménagé à l'extrémité de l'embout 9, est épaulé en 42 pour constituer face d'appui à un ressort de compression 43 interposé entre lui et l'extrémité antérieure 14e du corps de poignée 14. Une butée éclipsable 44, constituée par exemple par un levier articulé, immobilise le piston 26 en position d'arrêt, position dans laquelle, comme montré à la figure 10, il comprime le ressort 43. Pour mettre en marche l'installation, il suffit d'actionner la butée éclipsable 44 dans le sens de la flèche 43, pour libérer le piston 26 et permettre au ressort 43 de le propulser à l'intérieur du corps 14, en créant une forte onde de pression pneumatique. En fin de course, le piston 26 vient en butée contre la face postérieure du boitier 14 en mettant l'ouverture 27, qui lui est juxtaposée, en coïncidence avec le raccord 14a.The embodiment shown in Figure 10 differs from that shown in Figures 3 and 4 by the shape of the means ensuring the blocking of the piston 13 in the stopped position. Indeed, the plug 26 forming a piston 13 and formed at the end of the end piece 9, is shouldered at 42 to form a bearing face for a compression spring 43 interposed between it and the front end 14e of the handle body 14. An eclipsable stop 44, constituted for example by an articulated lever, immobilizes the piston 26 in the stopped position, position in which, as shown in FIG. 10, it compresses the spring 43. To start the installation, it suffices to actuate the eclipsable stop 44 in the direction of the arrow 43, to release the piston 26 and allow the spring 43 to propel it inside the body 14, creating a strong pneumatic pressure wave. At the end of the race, the piston 26 abuts against the rear face of the housing 14 by placing the opening 27, which is juxtaposed to it, in coincidence with the connector 14a.

Le déplacement en sens inverse de l'embout 9 par rapport à la poignée 14 provoque le verrouillage en position arrêt de l'embout et l'obturation du conduit, provoquant l'interruption de l'alimentation du moteur électrique 3 de la centrale 1.The displacement in the opposite direction of the nozzle 9 relative to the handle 14 causes the locking in the stop position of the nozzle and the obturation of the conduit, causing the interruption of the supply. of the electric motor 3 of the control unit 1.

La figure 5 montre une forme d'exécution des moyens disposés sur la centrale pour assurer la fermeture et l'ouverture du circuit électrique d'alimentation du moteur électrique 3. Sur ce dessin, 51 et 52 désignant les conducteurs d'alimentation par le secteur, 53 et 54 les conducteurs d'alimentation du moteur électrique 3, 55 et 56 les conducteurs du circuit de commande. Le pressostat 20 coopére avec un micro-contact 57 connecté au circuit 55-56 et commandant l'alimentation d'un télérupteur 48 monté sur le circuit d'alimentation 53 du moteur 3. Sur le circuit 56-55, est également connecté un contact 59 actionnable par un dispositif 60 détectant l'absence de débit dans le réseau de conduits 6-5.FIG. 5 shows an embodiment of the means arranged on the central unit for closing and opening the electrical supply circuit of the electric motor 3. In this drawing, 51 and 52 designating the supply conductors by the sector , 53 and 54 the supply conductors of the electric motor 3, 55 and 56 the conductors of the control circuit. The pressure switch 20 cooperates with a microswitch 57 connected to the circuit 55-56 and controlling the supply of a remote control switch 48 mounted on the supply circuit 53 of the motor 3. On the circuit 56-55, is also connected a contact 59 actuable by a device 60 detecting the absence of flow in the network of conduits 6-5.

Dans la forme d'exécution représentée figure 5, ce dispositif est constitué par un corps cylindrique 61 en forme de cloche dont le fond communique par un orifice calibré 62 avec l'intérieur du caisson 2 de la centrale d'aspiration. Un tiroir 63 est monté coulissant avec étanchéité dans le corps 61. Il comporte un alésage axial interne 64 servant de logement à un ressort de rappel 65 travaillant en compression et interposé entre lui et le corps 61. Enfin, ce tiroir est solidaire d'un épaulement externe avec face de butée 66 apte à coopérer avec le contact 59 précite.In the embodiment shown in FIG. 5, this device consists of a cylindrical body 61 in the shape of a bell, the bottom of which communicates through a calibrated orifice 62 with the inside of the box 2 of the central vacuum unit. A drawer 63 is slidably mounted with sealing in the body 61. It has an internal axial bore 64 serving as a housing for a return spring 65 working in compression and interposed between it and the body 61. Finally, this drawer is integral with a external shoulder with abutment face 66 capable of cooperating with the aforementioned contact 59.

Lorsque l'installation est en fonctionnement et tant qu'un débit parcourt le flexible 7 et le réseau de conduit 6, le tiroir 63 est dans la position représentée à la figure 5. Par contre, dès qu'il n'y a plus de débit dans le flexible et dans le réseau de conduit 6 et que, relativement la dépression dans le caisson 2 croît, cette dépression se transmet par l'orifice 62 dans le corps 61 et provoque le déplacement du tiroir dans le sens de la flèche 67. Sous l'effet de ce déplacement, la face de butée 66 rencontre le contact 59, ferme le circuit électrique commandant le télérupteur 58. Celui-ci change d'état et commande l'interruption de l'alimentation du moteur électrique 3.When the installation is in operation and as long as a flow travels through the hose 7 and the duct network 6, the slide 63 is in the position shown in FIG. 5. On the other hand, as soon as there is no longer any flow in the hose and in the duct network 6 and that, relatively, the depression in the box 2 increases, this depression is transmitted through the orifice 62 in the body 61 and causes the slide to move in the direction of the arrow 67. Under the effect of this displacement, the abutment face 66 meets the contact 59, closes the electrical circuit controlling the remote control switch 58. The latter changes state and controls the interruption of the supply of the electric motor 3.

De préférence, et pour éviter des interruptions intempestives non désirées de la centrale d'aspiration, par exemple en cas d'obturation de l'organe d'aspiration pendant son utilisation normale, le dispositif est associé à des moyens de temporisation. Dans la forme d'exécution représentée, ces moyens sont constitués par l'orifice 62 dont la section est déterminée afin de créer une perte de charge augmentant la durée de prise en compte dans le corps 61 de l'augmentation de la dépression dans la cuve 2.Preferably, and in order to avoid unwanted untimely interruptions of the suction unit, for example in the event of the suction member being blocked during normal use, the device is associated with time delay means. In the embodiment shown, these means consist of the orifice 62, the section of which is determined in order to create a pressure drop increasing the duration taking into account in the body 61 of the increase in depression in the tank 2.

Dans la forme d'exécution représentée, la tête du tiroir 63 est parcourue par un canal 68 mettant en communication l'intérieur du corps cylindrique 61 avec l'extérieur. Ce canal est obturé, au débouché du tiroir, par un volet 69. Ce agencement permet d'utiliser le tiroir comme organe de commande et de mise en marche et d'arrêt de la centrale. Pour mettre en marche manuellement, il suffit de pousser le tiroir dans le sens de la flèche 67. Sous l'effet de ce déplacement, l'air contenu dans le corps 61 et qui est comprimé dans ce corps en raison de la faible section de l'orifice 62 peut s'échapper à l'extérieur par le conduit 68 en soulevant le clapet 69. Ce déplacement permet d'amener la face de butée 66 contre le contact 59 et de modifier ainsi la position du télérupteur 58 qui passe dans sa position de fermeture du circuit 53-54 et commande aussi la mise en marche du moteur 3. On conçoit aisément qu'en repoussant le tiroir 63, il soit possible de modifier l'état du contact 59 et en conséquence de modifier celui du télérupteur qui commande ainsi l'arrêt d'alimentation du moteur 3.In the embodiment shown, the head of the drawer 63 is traversed by a channel 68 placing the interior of the cylindrical body 61 in communication with the exterior. This channel is closed, at the outlet of the drawer, by a flap 69. This arrangement makes it possible to use the drawer as a control member and for switching the central unit on and off. To start manually, simply push the drawer in the direction of arrow 67. Under the effect of this displacement, the air contained in the body 61 and which is compressed in this body due to the small cross-section of the orifice 62 can escape to the outside via the conduit 68 by lifting the valve 69. This displacement makes it possible to bring the abutment face 66 against the contact 59 and thus to modify the position of the remote control switch 58 which passes in its closed position of the circuit 53-54 and also controls the starting of the motor 3. It is easily conceivable that by pushing back the slide 63, it is possible to modify the state of the contact 59 and consequently to modify that of the remote control switch which thus controls the stop of supply to the motor 3.

Dans une autre forme d'exécution, visible figure 5, la détection de l'absence de débit s'effectue par contrôle de la pression d'air en sortie de la turbine 4. A cet effet, un volet à rappel élastique 70 est articulé sur le carter de la centrale et coopère avec le contact 71 d'un relais disposé sur un circuit non représenté, comportant un boitier électronique avec temporisation, et constituant un boitier de commande. En fonctionnement normal, le volet 70 est soulevé par la pression de l'air sortant. Dès que le débit dans les conduits chute et que la pression de sortie en fait autant, le volet pivote en tendant à obturer l'orifice de sortie, et libère le contact 71. Ce changement d'état du contact provoque, avec temporisation l'arrêt de la centrale d'aspiration 1.In another embodiment, visible in FIG. 5, the detection of the absence of flow takes place by controlling the air pressure at the outlet of the turbine 4. For this purpose, an elastic return flap 70 is articulated on the central unit casing and cooperates with contact 71 of a relay arranged on a circuit not shown, comprising an electronic unit with time delay, and constituting a control unit. In normal operation, the flap 70 is raised by the pressure of the outgoing air. As soon as the flow in the conduits drops and the outlet pressure does the same, the shutter pivots while tending to close the outlet orifice, and releases the contact 71. This change of state of the contact causes, with time delay, the shutdown of the central vacuum unit 1.

La figure 11 montre, dans d'autres formes d'exécution, des moyens de détection de l'onde de pression et des moyens de détection de l'augmentation de la dépression.FIG. 11 shows, in other embodiments, means for detecting the pressure wave and means for detecting the increase in depression.

Les moyens détectant l'onde de pression sont constitués par un capteur de mouvement 73 de type magnétique ou autre, disposé au voisinage de l'extrémité d'un volet articulé 18. Ainsi, lorsque l'onde de pression fait pivoter le volet 18 à l'encontre de son ressort de rappel 21, le déplacement de l'extrémité libre du volet est détecté par le capteur 73 qui réagit sur le boitier de commande du moteur 3.The means detecting the pressure wave are constituted by a motion sensor 73 of magnetic or other type, arranged in the vicinity of the end of an articulated flap 18. Thus, when the pressure wave makes the flap 18 pivot against its return spring 21, the displacement of the free end of the flap is detected by the sensor 73 which reacts on the engine control unit 3.

Un tel volet avec son capteur 73 peut aussi être disposé sur un conduit partant en dérivation de l'extrémité aval 6a du conduit 6.Such a flap with its sensor 73 can also be disposed on a conduit leaving in derivation from the downstream end 6a of the conduit 6.

Les moyens de détection de l'augmentation de la dépression dans le caisson 2 sont constitués par un dépressostat 74 qui est connecté électriquement sur le circuit de commande du moteur 3. Ce dépressostat est connecté pneumatiquement par un conduit 75 au caisson 2 avec interposition d'une part d'un ajutage d'étranglement 76 et, d'autre part, d'une chambre intermédiaire de temporisation 77.The means for detecting the increase in vacuum in the box 2 are constituted by a depressostat 74 which is electrically connected to the motor control circuit 3. This depressostat is pneumatically connected by a conduit 75 to the box 2 with interposition of on the one hand a throttle nozzle 76 and, on the other hand, an intermediate delay chamber 77.

Ainsi, lorsque la dépression croît dans le caisson 2, la transmission de cette croissance est transmise au dépressostat 74 avec un retard qui dépend de la section de l'ajutage 76 et du volume d'air de la chambre 77 et qui assure la temporisation recherchée.Thus, when the depression increases in the box 2, the transmission of this growth is transmitted to the depressostat 74 with a delay which depends on the section of the nozzle 76 and on the air volume of the chamber 77 and which ensures the desired time delay. .

Le dispositif de commande décrit ci-dessus dans le cas de son application à une installation d'aspiration centralisée peut aussi être appliqué, dans l'une ou l'autre ou dans deux de ses fonctions de mise en marche et d'arrêt, aux aspirateurs déplaçables, de type traineau, bidon, ou autres, aux installations de ventilations mécaniques, et aux installations de désenfumage. Dans ces dernières applications, les moyens générant l'onde de pression et ceux interrompant le débit d'aspiration ne sont pas disposés dans la poignée d'un flexible d'aspiration, mais dans un corps tubulaire raccordé ou raccordable à une prise disposée sur un conduit, ou un réseau de conduits et, en amont du caisson d'aspiration.The control device described above in the case of its application to a central vacuum system can also be applied, in one or the other or in two of its start and stop functions, to movable vacuum cleaners, canister type, canister, or other, to mechanical ventilation installations, and to smoke extraction installations. In these latter applications, the means generating the pressure wave and those interrupting the suction flow are not arranged in the handle of a suction hose, but in a tubular body connected or connectable to a socket disposed on a duct, or a network of ducts and, upstream of the suction box.

Claims (21)

  1. Remote control device for a vacuum or ventilation system, of the type comprising a chamber (2), a motorized suction fan (4), connected pneumatically to the outlet orifice (2b) from the chamber, and at least one pipe (6), the downstream end (6a) of which opens out into the chamber (2), means (13-40) connected to the upstream end (6b) of the pipe (6) capable of generating a temporary pneumatic pressure wave in the direction of its downstream end 6a, the latter being associated with means (20-22) for detecting the pressure wave and acting on the control box (23) for the supply to the electric motor (3) of the suction fan (4) to put the installation into operation, characterized in that the upstream end (6b) of the pipe (6) is fitted, on the one hand, with means (9, 13, 14, 15, 26, 37) for temporarily producing pneumatic over-compression consisting of a pressure wave, and on the other hand, with shut-off means (15, 26, 38) for use in periods when the installation is not in use and at least during the period during which the pneumatic overpressure is produced, in that the temporary pneumatic pressure wave is transmitted by the vacuum pipe (6) itself from its upstream end (6b) to its downstream end (6a), this downstream end (6a) being itself fitted, on the one hand, with means for detecting the pressure wave, and on the other hand, with a shut-off flap (18), mounted so as to pivot, held in the closed position by a spring (19) and capable of tilting to expose the pipe opening under the effect of a partial vacuum.
  2. Remote control device according to claim 1, characterized in that it also comprises, for stopping the installation, on the one hand, means (13-24) for interrupting the extraction flow in the pipe (6) and, on the other hand, means disposed near to the chamber (2), for detecting the absence of vacuum flow in this pipe and acting, with a time delay, on the control (23) in the direction in which the electricity power supply circuit for the motor (3) opens.
  3. Control device according to either of claims 1 or 2, characterized in that, in the case where it is applied to a vacuum installation comprising an independent hose (7) one of the ends of which can be connected to the pipe (6) and the other end of which is provided with a handle (8) with a front stub for attaching vacuum components and accessories, means (13-40) for generating the pressure wave are situated in the handle, possibly with means for shutting off the extraction flow.
  4. Device according to claim 3, characterized in that the means for generating the pressure wave consist of a piston (13) which, mounted so as to slide inside the body (14) of the handle (8), between a forward stop position and a rear working position, is formed at the rear end of the front tubular stub (9).
  5. Device according to both of claims 3 and 4, characterized in that the rear end of the front tubular stub (9) of the handle (8) is attached to means (28) for locking in rotation, cooperating with the body (14) of the handle and a plug (26), forming a piston (13), placed side by side with a radial opening (27) which is able, in the working position, to coincide with the outlet of the hose (7) in the body (14) of the handle (8).
  6. Device according to both of claims 3 and 4, characterized in that the rear end of the tubular stub (9) of the handle (8) is shut off by a flap (15), pivoting at (16), forming a piston (13) and able to lift under the effect of a partial vacuum.
  7. Device according to all of claims 3, 4 and 6, characterized in that the flap (15) is extended, beyond its pivot (16), by an essentially radial finger (15a), able respectively, at the end of the start traverse and at the end of the stop traverse, to come into contact with the faces of stops (36-35) in the body (14) of the handle causing it to be put in the open and closed position respectively.
  8. Device according to any one of claims 3 to 7, characterized in that the body (14) of the handle (8) is provided with elastic locking means (32-34) cooperating in position with a groove (30) in the stub (9), at least when this stub (9) is in the stop position.
  9. Device according to any one of claims 3 to 7, characterized in that a compression spring (43) is interposed between the rear end of the tubular stub (9) and the front end (14c) of the body (14) of the handle, while the body of the handle is provided with a retractible stop (44), operated from the outside, able to lock the stub (9) in the stop position with the spring (43) compressed.
  10. Device according to both of claims 3 and 4, characterized in that the handle (8) consists of a handle body (14b), a front tubular stub (9a), the rear end of which is associated with a pivoting flap (15), able to lift under the effect of vacuum, but forming a piston (13), and a bellows (37) connecting the body (14b) to this stub (9a).
  11. Device according to claim 3 characterized in that the handle is made in one piece and comprises a front part (14c) closed by a pivoting flap (38), able to lift under the effect of vacuum, and a rear part (14d) into which the outlet orifice (39) of a fan (40) opens, with an independent power supply and a push button control (41) on the handle, able to generate the pressure wave.
  12. Device according to any one of claims 1 to 11, characterized in that the means for detecting the pressure wave consist of a pressurestat (20) attached pneumatically, and by piping (22) to the pipe (6) and electrically to the control circuit (55-56) of the power supply to the motor (3).
  13. Device according to any one of claims 1 to 11, characterized in that the means for detecting the pressure wave consist of a displacement transducer (73) which, when detecting the movement of the flap (18) shutting off the end (6a) of the pipe (6), is connected to the control circuit (55-56) of the power supply to the motor (3).
  14. Device according to all of claims 1 to 3, characterized in that the means for interrupting the vacuum flow consist of a pivoting flap (24) disposed in the handle (8) and connected to manual operating devices.
  15. Device according to all of claims 1 to 4, characterized in that the means for interrupting the vacuum flow consist of the piston (13), when it is in the stop position.
  16. Device according to both of claims 1 and 2 and any one of claims 3 to 15, characterized in that the means for detecting the absence of flow in the pipe (6) react to an increase in the partial vacuum in the chamber (2).
  17. Device according to claim 16, characterized in that the means for detecting the absence of flow by variations in the partial vacuum in the chamber consist of a tubular body (61), outside the chamber (2) but communicating with this chamber by means of a slide (63) which, housed with its return spring (65) in the aforementioned body, is mounted so as to slide in an airtight manner inside this body (61), this slide (63) comprising at least one stop surface (66) able to activate, at the end of the work traverse against the spring (65), a contact (59) arranged in the electric control circuit for the motor (3).
  18. Device according to claim 17, characterized in that the tubular body (61) communicates with the chamber (2) by means of a calibrated restricting orifice (62) creating a load loss, delaying equalization of partial vacuums and movement of the slide (63).
  19. Device according to any one of claims 16 to 18 characterized in that the slide (63) consists of a device for starting the installation and comprises an internal pipe (68) with an external unidirectional shut-off flap valve (69), able to put the interior of the body (61) in communication with the outside, while the power supply circuit for the motor is supplied with a trip switch (59) connected electrically, on the one hand, to the contact (59), cooperating with the slide (63) of the means reacting to variations in partial vacuum and, on the other hand, to a contact (57) cooperating with the pressurestat (20) detecting the starting pressure wave.
  20. Device according to claim 16 characterized in that the means for detecting the vacuum flow by variations in the vacuum in the chamber (2) consist of a vacustat (74) connected electrically to the control circuit for the power supply to the motor (3) of the fan (4) and pneumatically to an intermediate delay chamber (77), itself connected to the chamber (2) with a regulating restriction (76) in between.
  21. Device according to both of claims 1 and 2 and any one of claims 3 to 15, characterized in that the means for detecting the absence of flow in the pipe (6), react to variations in air pressure in the outlet from the fan (4) and consist of a pivoting flap (70) disposed in the path of the air leaving the chamber (2), and cooperating with the contact (71) of a delay relay arranged in the electric control circuit of the motor (3).
EP90420252A 1989-05-23 1990-05-23 Apparatus for remote control of suction or ventilation system Expired - Lifetime EP0399931B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8906974A FR2647510B1 (en) 1989-05-23 1989-05-23 REMOTE CONTROL DEVICE FOR CENTRALIZED SUCTION SYSTEM
FR8906974 1989-05-23

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EP0399931A1 EP0399931A1 (en) 1990-11-28
EP0399931B1 true EP0399931B1 (en) 1995-10-25

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US (1) US5191673A (en)
EP (1) EP0399931B1 (en)
AT (1) ATE129393T1 (en)
CA (1) CA2017311C (en)
DE (1) DE69023165T2 (en)
DK (1) DK0399931T3 (en)
ES (1) ES2080817T3 (en)
FI (1) FI93166C (en)
FR (1) FR2647510B1 (en)
HK (1) HK1007480A1 (en)

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Publication number Publication date
FI93166B (en) 1994-11-30
HK1007480A1 (en) 1999-04-16
EP0399931A1 (en) 1990-11-28
FI902493A0 (en) 1990-05-21
FI93166C (en) 1995-03-10
DE69023165T2 (en) 1996-03-21
ATE129393T1 (en) 1995-11-15
FR2647510B1 (en) 1994-04-01
ES2080817T3 (en) 1996-02-16
DE69023165D1 (en) 1995-11-30
CA2017311A1 (en) 1990-11-23
CA2017311C (en) 1994-05-10
FR2647510A1 (en) 1990-11-30
US5191673A (en) 1993-03-09
DK0399931T3 (en) 1996-02-26

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