BE482235A

BE482235A -

Info

Publication number: BE482235A
Authority: BE
Priority date: 1965-02-15
Also published as: FR458095A; BE659742A

Description

       

  "Trompe d'aspiration" 

  
L'invention concerne une trompe d'aspira/tien des-

  
 <EMI ID=1.1> 

  
aspirateur de poussières. La trompe présente un orifice pour le fluide comprimé- gazeux ou liquide - débouchant dans une chambre d'éjection et un orifice de décharge pour la phase transportée. Un certain nombre de types de telles trompes existe déjà. D'ordinaire, le fluide comprimé est adduit sous forme d'un simple jet central dans la chambre d'éjection. Le fluide comprimé est parfois aussi divisé en plusieurs jets parallèles ou concourants,. Le désavantage;: des appareils actuels est du à leur capacité relativement faible. Les trompes à un seul injecteur de fluide comprimé sont encore celles, parmi les types actuels, qui sont susceptibles d'être le mieux appropriées, car la position ainsi que la section de passage de l'injecteur peuvent aisément .être variées dans le but d'obtenir un effet maximum.

  
L'invention est basée sur le principe nouveau de l'obtention d'une surface de contact considérablement agrandie entre le fluide comprimé et la phase transportée. La surface

  
de contact n'est pas limitée par la chambre d'éjection mais se prolonge dans le conduit de décharge de la trompe, d'où il résulte un effet de succion particulièrement énergique. L'invention est principalement caractérisée par le fait qu'un; mouvement de rotation est imparti au fluide comprimé quittant l'orifice de décharge de la chambre d'éjection.

  
Le dessin en annexe représente à simple titre d'exemple un mode de réalisation de la trompe, objet de l'invention, appliquée à un aspirateur de poussière à air comprimé. Dans ce dessin:
La figure 1 est une coupe axiale par la trompe La figure 2 est une coupe de détail par la ligne 2-2 de la figure 1. La figure 3 est une coupe par la ligne 3-3 de la figure 1. La figure 4 schématise les directions mutuelles des jets de fluide comprimé, vues en. projection sur un plan perpendiculaire à l'axe de l'éjecteur.

  
La tête .1 ne l'appareil comprend une chambre annulaire .2 servant de chambre distributrice pour l'air compri-

  
 <EMI ID=2.1> 

  
duisent à la chambre d'éjection 4 et servent d'injecteurs pour l'air comprimé. La chambre d'éjection 4 communique avec un tuyau d'aspiration 5 possédant une bride 6 raccordée à la tête

  
 <EMI ID=3.1> 

  
laire &#65533;. 

  
L'orifice de décharge de la chambre d'éjection

  
 <EMI ID=4.1>  <EMI ID=5.1> 

  
des plans tangentiels à une surface cylindrique qui est coaxiale au canal 8. et est de moindre diamètre que ce dernier.

  
Les jets des injecteurs jaillissent librement d'une paroi latérale de la chambre d'éjection à une partie opposée de la paroi latérale du canal de décharge 8. d'une manière telle que ces jets soient déviés selon une trajectoire hélicoïdale. L'invention se rapporte également à une

  
 <EMI ID=6.1> 

  
l'exemple choisi, les orifices de décharge des injecteurs 3 se trouvent dans un seul et même plan transversal de la chambre d'éjection. Une variante adéquate est obtenue en disposant ces orifices à des niveaux différents.

  
 <EMI ID=7.1> 

  
obligés de suivre la même trajectoire hélicoïdale ou au contraire suivre chacun la leur propre dans le canal $ et la

  
 <EMI ID=8.1> 

  
ment entraînée par les filets en déplacement et obligée de

  
 <EMI ID=9.1> 

  
tion une puissance extraordinaire. Une grande quantité d'air



  "Suction tube"

  
The invention relates to a suction tube / tien des-

  
 <EMI ID = 1.1>

  
vacuum cleaner. The pump has an orifice for the compressed gaseous or liquid fluid - opening into an ejection chamber and a discharge orifice for the transported phase. A number of types of such tubes already exist. Usually, the compressed fluid is added as a single central jet in the ejection chamber. The compressed fluid is sometimes also divided into several parallel or concurrent jets. The disadvantage of current devices is due to their relatively low capacity. Tubes with a single compressed fluid injector are still those, among the current types, which are likely to be the most suitable, since the position as well as the passage section of the injector can easily be varied for the purpose of 'achieve maximum effect.

  
The invention is based on the new principle of obtaining a considerably enlarged contact surface between the compressed fluid and the transported phase. The surface

  
contact is not limited by the ejection chamber but extends into the discharge duct of the proboscis, resulting in a particularly strong suction effect. The invention is mainly characterized in that a; rotational movement is imparted to the compressed fluid leaving the discharge port of the ejection chamber.

  
The appended drawing shows, by way of example, an embodiment of the horn, object of the invention, applied to a compressed air dust vacuum cleaner. In this drawing:
Figure 1 is an axial section through the proboscis Figure 2 is a detail section through line 2-2 of Figure 1. Figure 3 is a section through line 3-3 of Figure 1. Figure 4 schematically the mutual directions of the jets of compressed fluid, seen in. projection on a plane perpendicular to the ejector axis.

  
The head .1 does the apparatus include an annular chamber .2 serving as a distribution chamber for the compressed air.

  
 <EMI ID = 2.1>

  
feed to the ejection chamber 4 and serve as injectors for the compressed air. The ejection chamber 4 communicates with a suction pipe 5 having a flange 6 connected to the head

  
 <EMI ID = 3.1>

  
laire &#65533;.

  
The discharge port of the ejection chamber

  
 <EMI ID = 4.1> <EMI ID = 5.1>

  
planes tangential to a cylindrical surface which is coaxial with the channel 8 and is of smaller diameter than the latter.

  
The injector jets flow freely from a side wall of the ejection chamber to an opposite part of the side wall of the discharge channel 8 in such a way that these jets are deflected in a helical path. The invention also relates to a

  
 <EMI ID = 6.1>

  
the example chosen, the discharge orifices of the injectors 3 are located in one and the same transverse plane of the ejection chamber. A suitable variant is obtained by placing these orifices at different levels.

  
 <EMI ID = 7.1>

  
obliged to follow the same helical trajectory or on the contrary each follow their own in the channel $ and the

  
 <EMI ID = 8.1>

  
entrained by moving nets and forced to

  
 <EMI ID = 9.1>

  
tion extraordinary power. A large amount of air

Claims

can be transported with a relatively small quantity

of compressed fluid. From the tests carried out, it follows that,

the optimum angle between each jet of compressed fluid and the axis

of channel 8 could be determined and it appears that the power <EMI ID = 10.1>

about 35 [deg.]. The connection surface of the inner part of the channel 8 to the ejection chamber 4 is a surface

concave 16 allowing free passage to the jets which touch

thus the cylindrical wall of the channel 8. The transported phase

through the suction pipe 5 can freely enter into

contact with jets of compressed fluid. The inner surface of the ejection chamber � does not have an injector

protruding or other obstacles. The mouth of the suction pipe ',

versal.

When the proboscis is used, a pipe of

is tapped for the occasion. Valves 11 and 14

are preferably of the drawer type and adapted to be able to

be opened against the action of a spring. Through the opening

compressed fluid is sent to the distribution chamber 2-

via the conduit 12. The valve is adapted to be able to open the discharge port of the compressed air. When these two

valves are open, a blowing jet is created at the same

or dust collector, or to an exhaust pipe.

CLAIMS.

suction pipe leading into a suction chamber and

a discharge pipe of circular section emerging in said

chamber characterized in that it included means for <EMI ID = 17.1>

.forcing at least one jet of compressed fluid to flow freely from one side of the side wall of the suction chamber to the opposite side of the wall of said discharge pipe, said jet being directed toward the inner cylindrical surface of said pipe. such that said jet is deflected along a helical path,

2.- A horn according to claim 1, characterized in that the compressed fluid jet flows in a tangential plane at a cylindrical surface coaxial with said discharge pipe and of smaller diameter than that of said pipe.

in that it comprises means for producing several jets of compressed fluid, said means being adapted so

helical.

4. A horn according to claim 1, characterized in that it comprises means for producing several jets of compressed fluid, said means being adapted so as to force the jets to follow separate helical paths.

cations, characterized in that said means consist of conduits formed in the walls of said suction chamber.

6.- A horn according to any one of the preceding claims, characterized in that the discharge pipe comprises a first cylindrical part and a second part whose circular passage section increases towards the end.