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EP0999421B1 - Filtration apparatus and process for a cooling circuit - Google Patents

Filtration apparatus and process for a cooling circuit Download PDF

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Publication number
EP0999421B1
EP0999421B1 EP19990402765 EP99402765A EP0999421B1 EP 0999421 B1 EP0999421 B1 EP 0999421B1 EP 19990402765 EP19990402765 EP 19990402765 EP 99402765 A EP99402765 A EP 99402765A EP 0999421 B1 EP0999421 B1 EP 0999421B1
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EP
European Patent Office
Prior art keywords
grid
fluid
hollow body
molecular sieve
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19990402765
Other languages
German (de)
French (fr)
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EP0999421A1 (en
Inventor
Daniel Baron
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.)
Manuli Auto France SA
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Manuli Auto France SA
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Filing date
Publication date
Application filed by Manuli Auto France SA filed Critical Manuli Auto France SA
Publication of EP0999421A1 publication Critical patent/EP0999421A1/en
Application granted granted Critical
Publication of EP0999421B1 publication Critical patent/EP0999421B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters

Definitions

  • the present invention relates to devices for filtration for type refrigerant circuit comprising a hollow body provided on one side with a bottom and having on the other side an opening closed by a sealing piece, said sealing piece having a fluid inlet port.
  • the filter element is annular, crossed by a plunging tube of diameter reduced in communication with the outlet orifice downstream of the filter group.
  • a plunging tube of diameter reduced in communication with the outlet orifice downstream of the filter group.
  • This tank must also be introduced into the hollow body, around the diameter tubing reduced, which poses manufacturing problems.
  • the known devices are also in general made up of parts made of steel or aluminum, welded together using the technique TIG, which could damage the material the temperature-sensitive filter element, when the making.
  • the present invention aims to provide a device responding better than those previously known to requirements of the practice, particularly in that it authorizes a production which does not risk damaging the filter material, simple to use, using fewer parts than in the prior art, and using materials such as aluminum alloys, significantly lighter.
  • the invention notably proposes a filtration device for fluid circuit refrigerant comprising a hollow body and a sieve molecular, the hollow body delimiting a space and being provided on one side with a bottom and having the other side an opening closed by a coin shutter, said shutter piece comprising a fluid inlet port, and being integral with, or adjoining, the molecular sieve which is separated from said space by a porous disc or grid, called lower grid, strainer retention and fluid passage, characterized in that said passage grid is made of flexible plastic and is mounted in compression on the molecular sieve.
  • flexible is meant a material liable to deform in bending under a occasional pressure of a few pascals.
  • porous disc is for example constituted by a pancake in sintered polyamide, porosity between around 25 ⁇ m and around 250 ⁇ m.
  • Figures 1 and 2 show a device 1 according to a first embodiment of the invention.
  • the device 1 comprises a hollow body 2 in aluminum or steel alloy, formed of a wall cylindrical 3 for example from 1 to 3 mm thick, provided on one side with a bottom 4 formed in one piece with the wall 3 for example by impact spinning, and having a central cup-shaped cavity 4 '.
  • the hollow body delimits a space 2 'for passage of the fluid and has an opening on the other side 5 closed by a closure piece 6, also in aluminum alloy, substantially shaped cylindrical at the filling level and comprising an upper connection portion 7 with fluid inlet (E) and outlet (S) pipes refrigerant (see figure 2).
  • the liquid is for example a refrigerant of the type known under the references HFA134A or CFC12.
  • the part 6 includes an outlet orifice 8 for the fluid, arranged to be connected at 9, by through a tube 10 having a widening (see Figure 2), tightly and known in itself, with an outlet pipe (S).
  • the part 6 also includes an orifice 11 liquid inlet into the hollow body, arranged for be connected at 12, identically to the pipe outlet, to the inlet pipe (E).
  • the outlet 8 is also connected, on the side of the hollow body, with a plunging tube 13 up to the cup 4 'from the bottom 4 of the hollow body.
  • the end 14 of the tubing, opposite the part 6, is therefore directly connected to space 15 located at near the bottom 4 of the hollow body.
  • the tubing is for example made of material plastic, for example polyamide known as denomination 6-6, loaded at around 30% by weight glass fibers. She is also advantageously made of aluminum. She presents a part 16 which makes the connection with the orifice 8, and a main portion 17, having an elbow and a constant cylindrical cross section to its end 14.
  • the dimension of the external diameter of this tubing is for example between about fifth and about a tenth of the diameter internal of the hollow body.
  • the closure piece 6 is in the form of cylindrical half-shell and has a filter screen cylindrical 18 with external diameter identical to internal diameter of the half-shell.
  • the filter screen is formed of a molecular sieve, for example consisting of a layer of aluminosilicate beads, maintained in sandwich between the bottom 19 of the closure piece and a lower grid 20, constituted by a plate with holes or a lattice structure, of material identical to the tubing.
  • a molecular sieve for example consisting of a layer of aluminosilicate beads, maintained in sandwich between the bottom 19 of the closure piece and a lower grid 20, constituted by a plate with holes or a lattice structure, of material identical to the tubing.
  • the grid 20 is for example provided with ribs 21 radial stiffening. It comes into abutment towards the bottom against a cylindrical shoulder 22 formed by bending of the lower edge of the wall cylindrical of the half-shell, said wall cylindrical being integral with the bottom of the wall shutter.
  • the tubing 13 is fixed to the inlet of the orifice 8, on the bottom wall of the closure piece 6, for example by bonding with an adhesive of the type known under the name "Loctite®" or equivalent, and / or by deformation of the part 6 for example according to three points.
  • the inlet 11 is in turn communication with the molecular sieve via a filter mechanical or conical volume 23.
  • this mechanical filter 23 is consisting of a cone whose base is of a diameter substantially equal to that of the inlet port provided longitudinal slots 24, for example 0.5 mm of thickness, of passage of the fluid.
  • the slots are evenly distributed over the around the cone, and symmetrically, for example four slots extending substantially over the height cone arranged alternately with four half-slots, extending from the base of the cone, toward the top, so that the incoming fluid is then spread laterally and radially towards the outside of the filter in the molecular sieve, substantially homogeneously.
  • the closure piece 6 comprises on its periphery, a peripheral ring projection 27 coming into abutment against the upper edge of the opening of the hollow body when crimping the shutter piece, as we will see.
  • a O-ring seal 28 for example in elastomeric material of the type known as name VITON®.
  • This seal is threaded on the end of the part obturation located on the side of the hollow body by compared to the projection 27.
  • the closure piece 6 is also fixed to the end of the hollow body by one or more glue beads for example of the type known as name KOMMERLING®, under the reference CORAPOX® 562L2, or by means of a thin film of said glue distributed over the internal face of the periphery of the end of the hollow body or the external face of the piece opposite.
  • glue beads for example of the type known as name KOMMERLING®, under the reference CORAPOX® 562L2, or by means of a thin film of said glue distributed over the internal face of the periphery of the end of the hollow body or the external face of the piece opposite.
  • the end of the hollow body is then crimped onto the periphery of said part introduced into the opening, the lateral projection 24 coming in stop on the hollow body.
  • Filtration / desiccant of the refrigerant is carried out as follows.
  • the fluid enters the device through the orifice 11 of obturation piece 6 and enters immediately and directly into the mechanical filter conical 23.
  • an indicator can be provided the humidity level of the refrigerant (not shown), at output, allowing to appreciate the saturation of the molecular sieve, and / or a filling.
  • This indicator is arranged in a manner known per se to hold on to the operating pressure of the device (of the order of 27 bars).
  • the shutter piece 34 is here constituted by a cylindrical half-shell 35 formed by a wall thin open on the side of the filter screen 36 which it includes, and closed on the other side by a bottom 37 provided with two sockets 38 integral with the bottom 37, passage of the end of the pipes (E) and (S).
  • a flange 39 fixed to the bottom of the half-shell by bonding and a counter flange 40 ensure fixing pipes on the bottle irremovable.
  • the mechanical filter 41 is constituted by a screened cylinder of diameter substantially equal to that of the passage sleeve 38, entirely immersed in the molecular sieve 36, the section of the grids not exceeding 1 mm 2 .
  • Figure 5 shows another device 42 or bottle according to another embodiment of the invention.
  • the device 42 has a part 43 shutter including the inlet ports and of coolant outlet are arranged to allow connections to the hollow body by snap.
  • a cylindrical part 46 integral with the bottom 37 for example by gluing, allows the introduction and locking by quick coupling of pipe ends E and S.
  • connection described in the document FR-A-2 686 961 is for example usable.
  • Figures 6 and 7 show another mode of production of a device 50 according to the invention.
  • the device 50 comprises a hollow body 51 in form of cylindrical half-shell 52 provided with a bottom 53.
  • the bottom 53 is formed of a thick plate provided of a device 54 known in itself allowing the filling and pressure control, and the outlet port 55 for example bent for allow lateral exit of the outlet pipe S.
  • Port 55 is a communication with space 56 delimited by the internal face of the bottom 53, the face internal of the cylindrical half-shell 52 and the grid 57 fluid passage in the form of a pellet thin circular, including by example a circular tower turbine arranged regularly.
  • the closure piece 58 is constituted by a cylindrical half-shell 59 provided a bottom 60 in the form of a cylindrical plate.
  • the fluid inlet orifice 61 is centered by connection to the bottom and is extended by a mechanical filter 23 of the type described with reference to FIGS. 1 and 2, fully immersed in the molecular sieve 18.
  • the space 56 delimited by the hollow body is reduced, and for example by volume between the fifth and the tenth of the volume of molecular sieve.
  • Figures 8 and 9 show a device 70 to cylindrical body 71 with axis 72, made of aluminum defining a space 71 '.
  • the device is provided with a closure piece 73 cylindrical forming a plug, also made of aluminum, through through an orifice 74 inlet of the fluid and for example provided with a flange of connection 75 of the type described with reference to the figure 1.
  • the upper part 76 of the cylindrical body 71 is crimped and glued to the cylindrical outer face 77 of the plug.
  • the closure piece 73 is also pierced right through an axial cylindrical orifice 78, outlet of the fluid, fitted with a flare 79 tube connection with tubing (not shown).
  • the tube 79 is extended downwards by a tube plunger 80, for example made of plastic, of which the end 81 is open directly near the bottom 82 of the cylindrical body 71.
  • the device 70 includes a molecular sieve 83 of the type described. with reference to the preceding figures, maintained in compression between two grids 84 and 85, made of flexible plastic, respectively formed by a circular disc-shaped plate pierced square holes of 1 mm side with spaces between squares of the same order of magnitude.
  • the grid is for example of polyamide type 6-6 PA6 / 6 whose main moments of inertia are for example, for mx and my of the order of 700 gx mm 2 and for mz of the order of 1300 gx mm 2 .
  • the flat grid on the side of the screen is also provided with an outer circular peripheral edge of stiffening capable of cooperating with friction or slightly in force with the internal surface of the body 71 opposite.
  • stiffening rods 86 radial for example triangular and perpendicular are provided on the grid surface, distributed angularly and come to join a sleeve 87 cylindrical axial integral with the grid, passing of the dip tube 80.
  • the tube 80 is friction mounted through said sleeve to which it is for example glued.
  • the upper 84 and lower 85 grids are identical, symmetrical with respect to a plane horizontal, the upper part 89 of the sleeve 88 being for example in contact with the bottom 90 of the plug 73, which leaves a free space 91 between the inlet and the top surface of the grid, distribution of the fluid above the screen.
  • a felt sheet 92 is interposed between the molecular sieve and lower grid 85.
  • Figures 10 and 11 show a device 93 similar to device 70 except for the upper grid 94 which is devoid of tirans stiffeners, which increases its flexibility and therefore adaptation to the small change in volume of the sieve.
  • Figures 12 and 13 show another mode of realization of a device 95 similar to device of FIGS. 8 and 9 except as regards the upper grid 96 which here presents a part flared tapered central 97 including the periphery lower is in frictional contact with the tube plunger 80 at the felt sheet 92 and which has a peripheral part 98 in the form of inclined pan collar.
  • the upper grid 96 is full and provided with longitudinal slots 99, for example of 0.5 mm thickness, of fluid passage.
  • the slots are evenly distributed over the around the grid and symmetrically, by example four slots extending substantially over the entire length of the grid arranged alternately with four half-slots, extending to from the base of the cone, to the top on the frustoconical part.
  • the slots are arranged so that the incoming fluid is then diffused laterally and radially outward from the grid in the molecular sieve, so substantially homogeneous.
  • the closure piece 73 includes on its periphery, a peripheral annular projection 100 coming into abutment against the upper edge of the opening of the hollow body when crimping the shutter piece.
  • O-ring seal 101 for example in elastomeric material of the type known as name VITON®.
  • the present invention is not limited not to the embodiments more particularly described. On the contrary, it embraces all variants and especially those where the material used for the body, as for the internal tubing, is a plastic material such as polyamide reinforced with fiberglass, those where crimping is performed by filtering or by magneto-forming, or even those where the porous discs are made of any other material allowing the passage of fluid similarly to that of a grid.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)

Description

La présente invention concerne les dispositifs de filtration pour circuit de fluide réfrigérant du type comprenant un corps creux muni d'un côté d'un fond et présentant de l'autre côté une ouverture fermée par une pièce d'obturation, ladite pièce d'obturation comportant un orifice d'entrée du fluide.The present invention relates to devices for filtration for type refrigerant circuit comprising a hollow body provided on one side with a bottom and having on the other side an opening closed by a sealing piece, said sealing piece having a fluid inlet port.

Elle trouve une application particulièrement importante bien que non exclusive dans le domaine des bouteilles déshydratantes pour circuit de climatisation de véhicule automobile.It finds a particularly application important although not exclusive in the field of desiccant bottles for circuit motor vehicle air conditioning.

On connaít déjà des dispositifs de filtration pour circuits frigorifiques du type ci-dessus défini. De tels dispositifs contiennent un élément filtrant capable de retenir les impuretés et l'eau contenue dans le fluide réfrigérant.There are already known filtration devices for refrigeration circuits of the type defined above. Of such devices contain a filter element able to retain impurities and contained water in the refrigerant.

L'élément filtrant est de forme annulaire, traversé par une tubulure plongeante de diamètre réduit en communication avec l'orifice de sortie en aval du groupe filtrant. Un tel dispositif est connu du document EP-A-0 676 714.The filter element is annular, crossed by a plunging tube of diameter reduced in communication with the outlet orifice downstream of the filter group. Such a device is known from document EP-A-0 676 714.

Une telle disposition présente des inconvénients. En particulier, elle nécessite la fabrication d'un réservoir poreux spécifique de forme annulaire contenant le matériau filtrant. Such an arrangement has drawbacks. In particular, it requires the manufacture of a specific porous tank of annular shape containing the filter material.

Ce réservoir doit de plus être introduit dans le corps creux, autour de la tubulure de diamètre réduit, ce qui pose des problèmes de fabrication.This tank must also be introduced into the hollow body, around the diameter tubing reduced, which poses manufacturing problems.

Les dispositifs connus sont par ailleurs en général constitués par des pièces en acier ou en aluminium, soudées entre elles selon la technique TIG, ce qui risque d'endommager le matériau de l'élément filtrant sensible à la température, lors de la fabrication.The known devices are also in general made up of parts made of steel or aluminum, welded together using the technique TIG, which could damage the material the temperature-sensitive filter element, when the making.

La présente invention vise à fournir un dispositif répondant mieux que ceux antérieurement connus aux exigences de la pratique, notamment en ce qu'elle autorise une fabrication ne risquant pas d'endommager le matériau filtrant, simple à mettre en oeuvre, utilisant moins de pièces que dans l'art antérieur, et mettant en oeuvre des matériaux tels que des alliages d'aluminium, nettement plus légers.The present invention aims to provide a device responding better than those previously known to requirements of the practice, particularly in that it authorizes a production which does not risk damaging the filter material, simple to use, using fewer parts than in the prior art, and using materials such as aluminum alloys, significantly lighter.

Dans ce but, l'invention propose notamment un dispositif de filtration pour circuit de fluide réfrigérant comprenant un corps creux et un tamis moléculaire, le corps creux délimitant un espace et étant muni d'un côté d'un fond et présentant de l'autre côté une ouverture fermée par une pièce d'obturation, ladite pièce d'obturation comportant un orifice d'entrée du fluide, et étant solidaire avec, ou jouxtant, le tamis moléculaire qui est séparé dudit espace par un disque poreux ou une grille, dite grille inférieure, de retenue du tamis et de passage du fluide, caractérisé en ce que ladite grille de passage est en matériau plastique souple et est montée en compression sur le tamis moléculaire.To this end, the invention notably proposes a filtration device for fluid circuit refrigerant comprising a hollow body and a sieve molecular, the hollow body delimiting a space and being provided on one side with a bottom and having the other side an opening closed by a coin shutter, said shutter piece comprising a fluid inlet port, and being integral with, or adjoining, the molecular sieve which is separated from said space by a porous disc or grid, called lower grid, strainer retention and fluid passage, characterized in that said passage grid is made of flexible plastic and is mounted in compression on the molecular sieve.

Par souple, il faut entendre un matériau susceptible de se déformer en flexion sous une pression ponctuelle de quelques pascals.By flexible is meant a material liable to deform in bending under a occasional pressure of a few pascals.

Une telle souplesse va permettre un excellent maintien en compression du tamis dont le volume peut varier légèrement au cours de l'utilisation du dispositif. Such flexibility will allow excellent compression of the sieve, the volume of which can vary slightly during use of the device.

En cas d'utilisation d'un disque poreux, celui-ci est par exemple constitué par une galette en polyamide frittée, de porosité comprise entre de l'ordre de 25 µm et de l'ordre de 250 µm.If a porous disc is used, it is for example constituted by a pancake in sintered polyamide, porosity between around 25 µm and around 250 µm.

Dans des modes de réalisation avantageux, on a de plus recours à l'une et/ou à l'autre des dispositions suivantes :

  • le tamis moléculaire est compris entre deux disques poreux ou grilles de passage du fluide, à savoir une grille dite supérieure située du côté dudit orifice d'entrée, et ladite grille inférieure, de retenue du tamis.
In advantageous embodiments, use is made of one and / or the other of the following arrangements:
  • the molecular sieve is between two porous discs or grids for passage of the fluid, namely a so-called upper grid located on the side of said inlet orifice, and said lower grid, for retaining the sieve.

Dans le présent texte on utilisera les termes grille inférieure et grille supérieure, étant entendu que ces grilles peuvent être dans la plupart des cas également remplacées par des disques poreux.In this text we will use the terms lower grid and upper grid, it being understood that these grids can be in most cases also replaced by porous discs.

Avantageusement, le tamis filtrant est directement en contact avec au moins une grille, c'est-à-dire sans film ou paroi poreuse intermédiaire (de sac par exemple).

  • le disque poreux supérieur ou la grille supérieure est situé directement à proximité de l'orifice d'entrée.
Advantageously, the filter screen is directly in contact with at least one grid, that is to say without film or intermediate porous wall (of bag for example).
  • the upper porous disc or the upper grid is located directly near the inlet.

Par directement, il faut entendre à une distance faible, par exemple de l'ordre de 0,5 cm à 2 cm, laissant un espace interstitiel néanmoins suffisant entre le fond de la pièce d'obturation et la grille pour permettre une diffusion radiale du fluide qui peut ainsi pénétrer dans le tamis via toute la surface de la grille supérieure ;

  • le disque supérieur ou la grille supérieure présente une partie centrale tronconique terminée sur ses bords par une collerette annulaire inclinée vers l'extérieur de la grille ;
  • la grille supérieure comporte des fentes radiales disposées angulairement de façon à répartir le passage du fluide de façon régulière dans le tamis moléculaire ;
  • l'orifice d'entrée est prolongé par un filtre mécanique allongé autour d'un axe, inséré dans le tamis moléculaire et agencé pour diffuser le fluide radialement à l'intérieur dudit tamis ;
  • le filtre mécanique est cylindrique ;
  • le filtre mécanique est conique, l'extrémité du cône étant située vers la grille inférieure ;
  • au moins une grille de passage du fluide est formée d'une plaque percée de trous carrés ou rectangulaires ;
  • la grille inférieure et/ou la grille supérieure comportent des tirants radiaux rigidificateurs, par exemple quatre tirants régulièrement angulairement disposés ;
  • la pièce d'obturation comporte un orifice de sortie du fluide, relié à l'espace délimité par le corps creux par un tube plongeur traversant le tamis filtrant ;
  • le tube plongeur, d'évacuation du fluide, a son extrémité ouverte directement à proximité du fond du corps creux ;
  • l'orifice de sortie du fluide est situé dans le fond du corps creux, le filtre mécanique étant par exemple centré par rapport à la pièce d'obturation ;
  • lu tube plongeur est en matière plastique ;
  • le tamis moléculaire est de section transversale égale ou sensiblement égale à celle du corps creux et s'étend sur une hauteur déterminée ;
  • la hauteur déterminée du tamis moléculaire est comprise entre la moitié et les neuf dixièmes de la hauteur de l'espace délimité par le corps creux, par exemple les deux tiers ou les trois quarts ;
  • une feuille de feutre est intercalée entre le tamis moléculaire et la grille inférieure de passage du fluide ;
  • le dispositif comporte des moyens de fixation des tubes de raccordement d'entrée et de sortie du fluide par encliquetage ;
  • le corps creux est une première demi-coque munie d'une paroi cylindrique et la pièce d'obturation est une seconde demi-coque formée d'une seule pièce par un fond et une paroi cylindrique introduite à frottement dans la première demi-coque à laquelle elle est fixée par collage, la première demi-coque étant sertie sur la périphérie du fond de la deuxième demi-coque ;
  • le tamis moléculaire est contenu par la seconde demi-coque ;
  • le corps creux et la pièce d'obturation sont en alliage d'aluminium ;
By directly, it is meant at a small distance, for example of the order of 0.5 cm to 2 cm, leaving an interstitial space nevertheless sufficient between the bottom of the obturation piece and the grid to allow a radial diffusion of the fluid which can thus enter the screen via the entire surface of the upper grid;
  • the upper disc or the upper grid has a frustoconical central part terminated on its edges by an annular collar inclined towards the outside of the grid;
  • the upper grid has radial slots arranged angularly so as to distribute the passage of the fluid evenly in the molecular sieve;
  • the inlet orifice is extended by a mechanical filter elongated around an axis, inserted into the molecular sieve and arranged to diffuse the fluid radially inside said sieve;
  • the mechanical filter is cylindrical;
  • the mechanical filter is conical, the end of the cone being situated towards the lower grid;
  • at least one fluid passage grid is formed by a plate pierced with square or rectangular holes;
  • the lower grid and / or the upper grid comprise stiffening radial rods, for example four rods regularly angularly arranged;
  • the closure part comprises a fluid outlet orifice, connected to the space delimited by the hollow body by a dip tube passing through the filter screen;
  • the dip tube, for discharging the fluid, has its open end directly near the bottom of the hollow body;
  • the fluid outlet orifice is located in the bottom of the hollow body, the mechanical filter being for example centered with respect to the closure part;
  • the dip tube is made of plastic;
  • the molecular sieve has a cross section equal to or substantially equal to that of the hollow body and extends over a determined height;
  • the determined height of the molecular sieve is between half and nine tenths of the height of the space delimited by the hollow body, for example two thirds or three quarters;
  • a felt sheet is interposed between the molecular sieve and the lower fluid passage grid;
  • the device comprises means for fixing the inlet and outlet connection tubes of the fluid by snap-fastening;
  • the hollow body is a first half-shell provided with a cylindrical wall and the closure piece is a second half-shell formed in one piece by a bottom and a cylindrical wall introduced frictionally into the first half-shell with which it is fixed by gluing, the first half-shell being crimped on the periphery of the bottom of the second half-shell;
  • the molecular sieve is contained by the second half-shell;
  • the hollow body and the closure part are made of aluminum alloy;

L'invention sera mieux comprise à la lecture de la description qui suit de plusieurs modes de réalisation particuliers donnés à titre d'exemples non limitatifs.The invention will be better understood on reading the description which follows of several modes of particular achievements given as examples not limiting.

La description se réfère aux dessins qui l'accompagnent dans lesquels :

  • La figure 1 est une vue latérale en coupe axiale, d'un premier mode de réalisation d'un dispositif selon l'invention.
  • La figure 2 est une vue en perspective, écorchée, du dispositif de la figure 1.
  • La figure 3 est une vue en perspective partielle d'un autre mode de réalisation de la pièce d'obturation de la figure 1.
  • La figure 4 est une vue latérale en coupe d'un deuxième mode de réalisation du dispositif selon l'invention.
  • La figure 5 est une vue latérale, en coupe, d'un troisième mode de réalisation d'un dispositif selon l'invention.
  • La figure 6 est une vue en coupe latérale d'un quatrième mode de réalisation d'un dispositif selon l'invention.
  • La figure 7 est une vue en perspective, écorchée, du dispositif de la figure 6.
  • Les figures 8 et 9 montrent un cinquième mode de réalisation d'un dispositif selon l'invention en coupe et en perspective écorchée.
  • Les figures 10 et 11 montrent un sixième mode de réalisation d'un dispositif selon l'invention en coupe et en perspective écorchée.
  • Les figures 12 et 13 montrent un septième mode de réalisation d'un dispositif selon l'invention en coupe et en perspective écorchée.
The description refers to the accompanying drawings in which:
  • Figure 1 is a side view in axial section of a first embodiment of a device according to the invention.
  • FIG. 2 is a perspective view, cut away, of the device in FIG. 1.
  • FIG. 3 is a partial perspective view of another embodiment of the closure part of FIG. 1.
  • Figure 4 is a side sectional view of a second embodiment of the device according to the invention.
  • Figure 5 is a side view, in section, of a third embodiment of a device according to the invention.
  • Figure 6 is a side sectional view of a fourth embodiment of a device according to the invention.
  • FIG. 7 is a perspective view, cut away, of the device of FIG. 6.
  • Figures 8 and 9 show a fifth embodiment of a device according to the invention in section and in cutaway perspective.
  • Figures 10 and 11 show a sixth embodiment of a device according to the invention in section and in cutaway perspective.
  • Figures 12 and 13 show a seventh embodiment of a device according to the invention in section and in cutaway perspective.

Dans la suite de la description on utilisera les mêmes numéros de référence pour désigner des éléments identiques.In the following description, we will use the same reference numbers to designate items identical.

Les figures 1 et 2 montrent un dispositif 1 selon un premier mode de réalisation de l'invention.Figures 1 and 2 show a device 1 according to a first embodiment of the invention.

Le dispositif 1 comporte un corps creux 2 en alliage d'aluminium ou en acier, formé d'une paroi cylindrique 3 par exemple de 1 à 3 mm d'épaisseur, muni d'un côté d'un fond 4 formé d'une seule pièce avec la paroi 3 par exemple par filage par choc, et présentant une cavité centrale en forme de coupelle 4'.The device 1 comprises a hollow body 2 in aluminum or steel alloy, formed of a wall cylindrical 3 for example from 1 to 3 mm thick, provided on one side with a bottom 4 formed in one piece with the wall 3 for example by impact spinning, and having a central cup-shaped cavity 4 '.

Le corps creux délimite un espace 2' de passage du fluide et présente de l'autre côté une ouverture 5 fermée par une pièce d'obturation 6, également en alliage d'aluminium, de forme sensiblement cylindrique au niveau de l'obturation et comportant une portion supérieure de raccordement 7 avec des tuyaux d'entrée (E) et de sortie (S) du fluide réfrigérant (Cf. figure 2).The hollow body delimits a space 2 'for passage of the fluid and has an opening on the other side 5 closed by a closure piece 6, also in aluminum alloy, substantially shaped cylindrical at the filling level and comprising an upper connection portion 7 with fluid inlet (E) and outlet (S) pipes refrigerant (see figure 2).

Le liquide est par exemple un fluide frigorigène du type connu sous les références HFA134A ou CFC12. The liquid is for example a refrigerant of the type known under the references HFA134A or CFC12.

La pièce 6 comprend un orifice 8 de sortie du fluide, agencé pour être connecté en 9, par l'intermédiaire d'un tube 10 présentant un élargissement (voir figure 2), de façon étanche et connue en elle-même, avec un tuyau de sortie (S).The part 6 includes an outlet orifice 8 for the fluid, arranged to be connected at 9, by through a tube 10 having a widening (see Figure 2), tightly and known in itself, with an outlet pipe (S).

La pièce 6 comprend également un orifice 11 d'entrée du liquide dans le corps creux, agencé pour être connecté en 12, de façon identique au tuyau de sortie, au tuyau d'entrée (E).The part 6 also includes an orifice 11 liquid inlet into the hollow body, arranged for be connected at 12, identically to the pipe outlet, to the inlet pipe (E).

L'orifice de sortie 8 est par ailleurs connecté, du côté du corps creux, à une tubulure 13 plongeante jusqu'à la coupelle 4' du fond 4 du corps creux.The outlet 8 is also connected, on the side of the hollow body, with a plunging tube 13 up to the cup 4 'from the bottom 4 of the hollow body.

L'extrémité 14 de la tubulure, opposée à la pièce 6, est donc'directement reliée à l'espace 15 situé à proximité du fond 4 du corps creux.The end 14 of the tubing, opposite the part 6, is therefore directly connected to space 15 located at near the bottom 4 of the hollow body.

La tubulure est par exemple réalisée en matière plastique, par exemple en polyamide connu sous la dénomination 6-6, chargé à de l'ordre de 30% en poids de fibres de verre. Elle est également avantageusement réalisée en aluminium. Elle présente une partie 16 qui réalise la connexion avec l'orifice 8, et une portion principale 17, présentant un coude et une section transversale cylindrique constante jusqu'à son extrémité 14.The tubing is for example made of material plastic, for example polyamide known as denomination 6-6, loaded at around 30% by weight glass fibers. She is also advantageously made of aluminum. She presents a part 16 which makes the connection with the orifice 8, and a main portion 17, having an elbow and a constant cylindrical cross section to its end 14.

La dimension du diamètre externe de cette tubulure est par exemple comprise entre de l'ordre d'un cinquième et de l'ordre de un dixième du diamètre interne du corps creux. The dimension of the external diameter of this tubing is for example between about fifth and about a tenth of the diameter internal of the hollow body.

Dans le mode de réalisation plus particulièrement décrit ici, la pièce d'obturation 6 est en forme de demi-coque cylindrique et comporte un tamis filtrant cylindrique 18 de diamètre externe identique au diamètre interne de la demi-coque.In the embodiment more particularly described here, the closure piece 6 is in the form of cylindrical half-shell and has a filter screen cylindrical 18 with external diameter identical to internal diameter of the half-shell.

Plus précisément le tamis filtrant est formé d'un tamis moléculaire, par exemple constitué par une couche de billes en aluminosilicate, maintenue en sandwich entre le fond 19 de la pièce d'obturation et une grille inférieure 20, constituée par une plaque à trous ou une structure en treillis, en matériau identique à la tubulure.More specifically, the filter screen is formed of a molecular sieve, for example consisting of a layer of aluminosilicate beads, maintained in sandwich between the bottom 19 of the closure piece and a lower grid 20, constituted by a plate with holes or a lattice structure, of material identical to the tubing.

La grille 20 est par exemple munie de nervures 21 de rigidification radiales. Elle vient en butée vers le bas contre un épaulement cylindrique 22 formée par recourbement du bord inférieur de la paroi cylindrique de la demi-coque, ladite paroi cylindrique étant solidaire du fond de la paroi d'obturation.The grid 20 is for example provided with ribs 21 radial stiffening. It comes into abutment towards the bottom against a cylindrical shoulder 22 formed by bending of the lower edge of the wall cylindrical of the half-shell, said wall cylindrical being integral with the bottom of the wall shutter.

La tubulure 13 est fixée à l'entrée de l'orifice 8, sur la paroi inférieure de la pièce d'obturation 6, par exemple par collage avec une colle du type connu sous la dénomination « Loctite® » ou équivalent, et/ou par déformation de la pièce 6 par exemple suivant trois points.The tubing 13 is fixed to the inlet of the orifice 8, on the bottom wall of the closure piece 6, for example by bonding with an adhesive of the type known under the name "Loctite®" or equivalent, and / or by deformation of the part 6 for example according to three points.

L'orifice 11 d'entrée est quant à lui en communication avec le tamis moléculaire via un filtre mécanique ou volumique conique 23. The inlet 11 is in turn communication with the molecular sieve via a filter mechanical or conical volume 23.

Plus précisément ce filtre mécanique 23 est constitué par un cône dont la base est d'un diamètre sensiblement égal à celui de l'orifice d'entrée muni de fentes longitudinales 24, par exemple de 0,5 mm d'épaisseur, de passage du fluide.More precisely, this mechanical filter 23 is consisting of a cone whose base is of a diameter substantially equal to that of the inlet port provided longitudinal slots 24, for example 0.5 mm of thickness, of passage of the fluid.

Les fentes sont réparties régulièrement sur le pourtour du cône, et de façon symétrique, par exemple quatre fentes s'étendant sensiblement sur la hauteur du cône disposées alternativement avec quatre demi-fentes, s'étendant à partir de la base du cône, vers le sommet, de sorte que le fluide rentrant soit ensuite diffusé latéralement et radialement vers l'extérieur du filtre dans le tamis moléculaire, de façon sensiblement homogène.The slots are evenly distributed over the around the cone, and symmetrically, for example four slots extending substantially over the height cone arranged alternately with four half-slots, extending from the base of the cone, toward the top, so that the incoming fluid is then spread laterally and radially towards the outside of the filter in the molecular sieve, substantially homogeneously.

Le pièce d'obturation 6 comprend sur sa périphérie, un ressaut annulaire périphérique 27 venant en butée contre le bord supérieur de l'ouverture du corps creux lors du sertissage de la pièce d'obturation, comme on va le voir.The closure piece 6 comprises on its periphery, a peripheral ring projection 27 coming into abutment against the upper edge of the opening of the hollow body when crimping the shutter piece, as we will see.

Dans un mode de réalisation, il peut être prévu un joint torique d'étanchéité 28, par exemple en matériau élastomère du type connu sous la dénomination VITON®.In one embodiment, there may be provided a O-ring seal 28, for example in elastomeric material of the type known as name VITON®.

Ce joint est enfilé sur l'extrémité de la pièce d'obturation située du côté du corps creux par rapport au ressaut 27.This seal is threaded on the end of the part obturation located on the side of the hollow body by compared to the projection 27.

La pièce d'obturation 6 est par ailleurs fixée à l'extrémité du corps creux par un ou plusieurs cordons de colle par exemple du type connue sous la dénomination KOMMERLING® , sous la référence CORAPOX® 562L2, ou par l'intermédiaire d'une fine pellicule de ladite colle répartie sur la face interne de la périphérie de l'extrémité du corps creux ou de la face externe de la pièce en vis-à-vis.The closure piece 6 is also fixed to the end of the hollow body by one or more glue beads for example of the type known as name KOMMERLING®, under the reference CORAPOX® 562L2, or by means of a thin film of said glue distributed over the internal face of the periphery of the end of the hollow body or the external face of the piece opposite.

L'extrémité du corps creux est ensuite sertie sur la périphérie de ladite pièce introduite dans l'ouverture, l'excroissance latérale 24 venant en butée sur le corps creux.The end of the hollow body is then crimped onto the periphery of said part introduced into the opening, the lateral projection 24 coming in stop on the hollow body.

Sur les figures 1 et 2 on a représenté un mode de fixation des tuyaux d'entrée (E) et de sortie (S) par bride de fixation 29 munie d'orifices 30 de fixation par vis coopérant dans les trous 31 en vis-à-vis de la pièce d'obturation 6.In Figures 1 and 2 a mode of fixing the inlet (E) and outlet (S) pipes by fixing flange 29 provided with fixing holes 30 by screw cooperating in the holes 31 opposite the sealing piece 6.

On va maintenant décrire le fonctionnement du dispositif décrit en référence aux figures 1 et 2.We will now describe how the device described with reference to Figures 1 and 2.

La filtration/déshydratante du fluide réfrigérant s'effectue de la façon suivante.Filtration / desiccant of the refrigerant is carried out as follows.

Le fluide entre dans le dispositif par l'orifice 11 de la pièce d'obturation 6 et pénètre immédiatement et directement dans le filtre mécanique conique 23.The fluid enters the device through the orifice 11 of obturation piece 6 and enters immediately and directly into the mechanical filter conical 23.

Il diffuse alors radialement au travers du filtre de façon sensiblement homogène, en privilégiant toutefois la partie haute du cône, dans l'espace cylindrique du tamis filtrant.It then diffuses radially through the filter in a substantially homogeneous way, by favoring however the upper part of the cone, in the space cylindrical filter screen.

Il passe ainsi à l'intérieur du tamis où il se sépare de ses traces d'humidité et des particules solides, puis sort du tamis via la grille 20, avant de pénétrer l'espace 2' du corps creux 2 puis ressortir via la tubulure 13 par l'orifice de sortie 8.It thus passes inside the sieve where it separates from its traces of moisture and particles solids, then exits the screen via the grid 20, before penetrate the space 2 ′ of the hollow body 2 then exit via tubing 13 through the outlet 8.

Avantageusement il peut être prévu un indicateur du taux d'humidité du fluide réfrigérant (non représenté), en sortie, permettant d'apprécier la saturation du tamis moléculaire, et/ou un voyant de remplissage.Advantageously, an indicator can be provided the humidity level of the refrigerant (not shown), at output, allowing to appreciate the saturation of the molecular sieve, and / or a filling.

Cet indicateur est agencé de façon connue en elle-même pour tenir à la pression de fonctionnement du dispositif (de l'ordre de 27 bars).This indicator is arranged in a manner known per se to hold on to the operating pressure of the device (of the order of 27 bars).

Sur la figure 4 on a représenté un autre dispositif 33 selon l'invention.In Figure 4 we have shown another device 33 according to the invention.

La pièce d'obturation 34 est ici constituée par une demi-coque cylindrique 35 formée d'une paroi mince ouverte du côté du tamis filtrant 36 qu'elle englobe, et fermée de l'autre côté par un fond 37 muni de deux douilles 38 solidaires du fond 37, de passage de l'extrémité des tuyaux (E) et (S).The shutter piece 34 is here constituted by a cylindrical half-shell 35 formed by a wall thin open on the side of the filter screen 36 which it includes, and closed on the other side by a bottom 37 provided with two sockets 38 integral with the bottom 37, passage of the end of the pipes (E) and (S).

Une bride 39 fixée au fond de la demi-coque par collage et une contre bride 40 assurent la fixation des tuyaux sur la bouteille de façon inamovible.A flange 39 fixed to the bottom of the half-shell by bonding and a counter flange 40 ensure fixing pipes on the bottle irremovable.

Dans ce mode de réalisation le filtre mécanique 41 est constitué par un cylindre grillagé de diamètre sensiblement égal à celui de la douille de passage 38, entièrement plongé dans le tamis moléculaire 36, la section des grilles ne dépassant pas 1 mm2. In this embodiment, the mechanical filter 41 is constituted by a screened cylinder of diameter substantially equal to that of the passage sleeve 38, entirely immersed in the molecular sieve 36, the section of the grids not exceeding 1 mm 2 .

La figure 5 montre un autre dispositif 42 ou bouteille selon un autre mode de réalisation de l'invention.Figure 5 shows another device 42 or bottle according to another embodiment of the invention.

Le dispositif 42 présente une pièce 43 d'obturation dont les orifices d'entrée et de sortie du fluide réfrigérant sont agencés pour permettre des raccordements au corps creux par encliquetage.The device 42 has a part 43 shutter including the inlet ports and of coolant outlet are arranged to allow connections to the hollow body by snap.

Une pièce 46, cylindrique, solidaire du fond 37 par exemple par collage, permet l'introduction et le blocage par raccord rapide des extrémités des tuyaux E et S.A cylindrical part 46, integral with the bottom 37 for example by gluing, allows the introduction and locking by quick coupling of pipe ends E and S.

Le type de raccordement décrit dans le document FR-A-2 686 961 est par exemple utilisable.The type of connection described in the document FR-A-2 686 961 is for example usable.

Les figures 6 et 7 montrent un autre mode de réalisation d'un dispositif 50 selon l'invention.Figures 6 and 7 show another mode of production of a device 50 according to the invention.

Le dispositif 50 comprend un corps creux 51 en forme de demi-coque cylindrique 52 munie d'un fond 53.The device 50 comprises a hollow body 51 in form of cylindrical half-shell 52 provided with a bottom 53.

Le fond 53 est formé d'une plaque épaisse munie d'un dispositif 54 connu en lui-même permettant le remplissage et le contrôle de pression, et de l'orifice de sortie 55 par exemple coudé pour permettre une sortie latérale du tuyau de sortie S.The bottom 53 is formed of a thick plate provided of a device 54 known in itself allowing the filling and pressure control, and the outlet port 55 for example bent for allow lateral exit of the outlet pipe S.

L'orifice 55 est un communication avec l'espace 56 délimité par la face interne du fond 53, la face interne de la demi-coque cylindrique 52 et la grille 57 de passage du fluide en forme de pastille circulaire de faible épaisseur, comprenant par exemple une turbine de tour circulaire disposé régulièrement.Port 55 is a communication with space 56 delimited by the internal face of the bottom 53, the face internal of the cylindrical half-shell 52 and the grid 57 fluid passage in the form of a pellet thin circular, including by example a circular tower turbine arranged regularly.

La pièce d'obturation 58 est quant à elle constituée par une demi-coque 59 cylindrique munie d'un fond 60 en forme de plaque cylindrique.The closure piece 58 is constituted by a cylindrical half-shell 59 provided a bottom 60 in the form of a cylindrical plate.

L'orifice 61 d'entrée du fluide est centré par rapport au fond et est prolongé d'un filtre mécanique 23 du type décrit en référence aux figures 1 et 2, plongeant entièrement dans le tamis moléculaire 18.The fluid inlet orifice 61 is centered by connection to the bottom and is extended by a mechanical filter 23 of the type described with reference to FIGS. 1 and 2, fully immersed in the molecular sieve 18.

Celui-ci est inséré d'une part entre le fond et la paroi cylindrique de la demi-coque 59, et d'autre part entre une feuille de feutre 62 commue en elle-même et la grille 57 de passage du fluide.This is inserted on the one hand between the bottom and the cylindrical wall of the half-shell 59, and other part between a felt sheet 62 commuted in itself and the grid 57 for passage of the fluid.

Dans ce mode de réalisation, l'espace 56 délimité par le corps creux est réduit, et par exemple de volume compris entre le cinquième et le dixième du volume du tamis moléculaire.In this embodiment, the space 56 delimited by the hollow body is reduced, and for example by volume between the fifth and the tenth of the volume of molecular sieve.

Les figures 8 et 9 montrent un dispositif 70 à corps cylindrique 71 d'axe 72, en aluminium définissant un espace 71'.Figures 8 and 9 show a device 70 to cylindrical body 71 with axis 72, made of aluminum defining a space 71 '.

Le dispositif est muni d'une pièce d'obturation 73 cylindrique formant bouchon, également en aluminium, percée de part en part d'un orifice 74 d'entrée du fluide et par exemple muni d'une bride de raccordement 75 du type décrit en référence à la figure 1.The device is provided with a closure piece 73 cylindrical forming a plug, also made of aluminum, through through an orifice 74 inlet of the fluid and for example provided with a flange of connection 75 of the type described with reference to the figure 1.

La partie supérieure 76 du corps cylindrique 71 est sertie et collée sur la face externe cylindrique 77 du bouchon. The upper part 76 of the cylindrical body 71 is crimped and glued to the cylindrical outer face 77 of the plug.

La pièce d'obturation 73 est par ailleurs percée de part en part d'un orifice cylindrique axial 78, de sortie du fluide, muni d'un tube 79 à évasement de connexion avec une tubulure (non représentée).The closure piece 73 is also pierced right through an axial cylindrical orifice 78, outlet of the fluid, fitted with a flare 79 tube connection with tubing (not shown).

Le tube 79 est prolongé vers le bas par un tube plongeur 80, par exemple en matière plastique, dont l'extrémité 81 est ouverte directement à proximité du fond 82 du corps cylindrique 71.The tube 79 is extended downwards by a tube plunger 80, for example made of plastic, of which the end 81 is open directly near the bottom 82 of the cylindrical body 71.

Le dispositif 70 comporte un tamis moléculaire 83 du type décrit.en référence aux figures précédentes, maintenu en compression entre deux grilles 84 et 85, en matière plastique souple, respectivement formées par une plaque en forme de disque circulaire percées de trous carrés d'1 mm de côté avec des espaces entre carrés du même ordre de grandeur.The device 70 includes a molecular sieve 83 of the type described. with reference to the preceding figures, maintained in compression between two grids 84 and 85, made of flexible plastic, respectively formed by a circular disc-shaped plate pierced square holes of 1 mm side with spaces between squares of the same order of magnitude.

Plus précisément, la grille est par exemple en polyamide type 6-6 PA6/6 dont les moments principaux d'inertie sont par exemple, pour mx et my de l'ordre de 700 g x mm2 et pour mz de l'ordre de 1300 g x mm2.More precisely, the grid is for example of polyamide type 6-6 PA6 / 6 whose main moments of inertia are for example, for mx and my of the order of 700 gx mm 2 and for mz of the order of 1300 gx mm 2 .

La grille plate du côté du tamis est par ailleurs munie d'un bord périphérique circulaire extérieur de rigidification propre à coopérer à frottement ou légèrement en force avec la face interne du corps 71 en vis-à-vis.The flat grid on the side of the screen is also provided with an outer circular peripheral edge of stiffening capable of cooperating with friction or slightly in force with the internal surface of the body 71 opposite.

Quatre, ou huit tirans 86 de rigidification radiaux par exemple triangulaires et perpendiculaires à la surface de la grille, sont prévus, répartis angulairement et viennent rejoindre un manchon 87 cylindrique axial solidaire de la grille, de passage du tube plongeur 80.Four, or eight stiffening rods 86 radial for example triangular and perpendicular are provided on the grid surface, distributed angularly and come to join a sleeve 87 cylindrical axial integral with the grid, passing of the dip tube 80.

Le tube 80 est monté à frottement au travers dudit manchon auquel il est par exemple collé.The tube 80 is friction mounted through said sleeve to which it is for example glued.

Les grilles supérieure 84 et inférieure 85 sont identiques, symétriques par rapport à un plan horizontal, la partie supérieure 89 du manchon 88 étant par exemple en contact avec le fond 90 du bouchon 73, ce qui laisse un espace libre 91 entre l'orifice d'entrée et la surface supérieure de la grille, de répartition du fluide au-dessus du tamis.The upper 84 and lower 85 grids are identical, symmetrical with respect to a plane horizontal, the upper part 89 of the sleeve 88 being for example in contact with the bottom 90 of the plug 73, which leaves a free space 91 between the inlet and the top surface of the grid, distribution of the fluid above the screen.

Une feuille de feutre 92 est intercalée entre le tamis moléculaire et la grille inférieure 85.A felt sheet 92 is interposed between the molecular sieve and lower grid 85.

Les figures 10 et 11 montrent un dispositif 93 semblable au dispositif 70 sauf en ce qui concerne la grille supérieure 94 qui est dépourvue de tirans rigidificateurs, ce qui augmente sa souplesse et donc l'adaptation au faible changement de volume du tamis.Figures 10 and 11 show a device 93 similar to device 70 except for the upper grid 94 which is devoid of tirans stiffeners, which increases its flexibility and therefore adaptation to the small change in volume of the sieve.

Les figures 12 et 13 montrent un autre mode de réalisation d'un dispositif 95 semblable au dispositif des figures 8 et 9 sauf en ce qui concerne la grille supérieure 96 qui présente ici une partie centrale évasée tronconique 97 dont la pourtour inférieur est en contact à frottement avec le tube plongeur 80 au niveau de la feuille de feutre 92 et qui présente une partie périphérique 98 en forme de collerette à pan incliné. Figures 12 and 13 show another mode of realization of a device 95 similar to device of FIGS. 8 and 9 except as regards the upper grid 96 which here presents a part flared tapered central 97 including the periphery lower is in frictional contact with the tube plunger 80 at the felt sheet 92 and which has a peripheral part 98 in the form of inclined pan collar.

Plus précisément, la grille supérieure 96 est pleine et munie de fentes longitudinales 99, par exemple de 0,5 mm d'épaisseur, de passage du fluide.More specifically, the upper grid 96 is full and provided with longitudinal slots 99, for example of 0.5 mm thickness, of fluid passage.

Les fentes sont réparties régulièrement sur le pourtour de la grille et de façon symétrique, par exemple quatre fentes s'étendant sensiblement sur toute la longueur de la grille disposées alternativement avec quatre demi-fentes, s'étendant à partir de la base du cône, vers le sommet sur la partie tronconique.The slots are evenly distributed over the around the grid and symmetrically, by example four slots extending substantially over the entire length of the grid arranged alternately with four half-slots, extending to from the base of the cone, to the top on the frustoconical part.

De façon plus générale, les fentes sont agencées de sorte que le fluide rentrant soit ensuite diffusé latéralement et radialement vers l'extérieur de la grille dans le tamis moléculaire, de façon sensiblement homogène.More generally, the slots are arranged so that the incoming fluid is then diffused laterally and radially outward from the grid in the molecular sieve, so substantially homogeneous.

La pièce d'obturation 73 comprend sur sa périphérie, un ressaut annulaire périphérique 100 venant en butée contre le bord supérieur de l'ouverture du corps creux lors du sertissage de la pièce d'obturation.The closure piece 73 includes on its periphery, a peripheral annular projection 100 coming into abutment against the upper edge of the opening of the hollow body when crimping the shutter piece.

Dans un mode de réalisation, il peut être prévu un joint torique 101 d'étanchéité, par exemple en matériau élastomère du type connu sous la dénomination VITON® .In one embodiment, there may be provided a O-ring seal 101, for example in elastomeric material of the type known as name VITON®.

Les avantages de l'invention par rapport à l'art antérieur sont notamment :

  • un gain de poids de l'ordre de 30 à 50% par rapport aux pièces en acier ;
  • un assemblage facile, sans brasure ou soudure, et donc sans risque de fuite ou d'endommagement des matériaux filtrants ;
  • des pertes de charge réduites du fait d'une plus grande section de passage sur une plus grande partie du cheminement.
The advantages of the invention compared to the prior art are in particular:
  • a weight gain of around 30 to 50% compared to steel parts;
  • easy assembly, without soldering or welding, and therefore without risk of leakage or damage to the filter materials;
  • reduced pressure losses due to a larger passage section over a greater part of the path.

Comme il va de soi et comme il résulte d'ailleurs de ce qui précède, la présente invention ne se limite pas aux modes de réalisation plus particulièrement décrits. Elle en embrasse au contraire toutes les variantes et notamment celles où le matériau utilisé pour le corps, comme pour la tubulure interne, est une matière plastique telle que du polyamide armé de fibre de verre, celles où le sertissage est effectué par filtrage ou par magnéto-formage, ou encore celles où les disques poreux sont en tout autre matériau permettant le passage du fluide de façon similaire à celle d'une grille.As it goes without saying and as it results from elsewhere of the above, the present invention is not limited not to the embodiments more particularly described. On the contrary, it embraces all variants and especially those where the material used for the body, as for the internal tubing, is a plastic material such as polyamide reinforced with fiberglass, those where crimping is performed by filtering or by magneto-forming, or even those where the porous discs are made of any other material allowing the passage of fluid similarly to that of a grid.

Claims (21)

  1. Filtration device (1, 33, 42, 50, 70, 93, 95) for a refrigerant fluid circuit comprising a hollow body and a molecular sieve (18, 36, 83), the hollow body (2, 51, 71) delimiting a space (2', 56, 71') and being provided on one side with a bottom (4, 53, 82) and having on the other side an opening (5) that is closed by an obturating part (6, 43, 58, 73), said obturating part having an inlet orifice (11, 61, 74) for the fluid, and being integral with, or adjacent to, the molecular sieve separated from said space by a porous disc or a grid (20, 57, 85), called a lower grid, for holding the sieve and allowing fluid to pass through, characterised in that said passage grid is made of flexible plastic material and is mounted in compression against the molecular sieve.
  2. Device (70, 93, 95) according to Claim 1, characterised in that the molecular sieve (83) is comprised between two porous discs or fluid passage grids, namely, what is called an upper grid (84, 94, 96) located on the side of the inlet orifice (74), and said lower grid (85), for holding the sieve.
  3. Device according to Claim 2, characterised in that the upper disc or the upper grid (84, 94, 96) is located directly next to the inlet orifice.
  4. Device according to either one of Claims 2 and 3, characterised in that the upper disc or upper grid (96) has a central portion (97) in the shape of a truncated cone ending at its edges in an annular flange (98) sloping towards the outside of the grid.
  5. Device according to any one of Claims 2 to 4, characterised in that the upper grid (96) has radial slots (99) arranged angularly so as to distribute the passage of the fluid evenly within the molecular sieve.
  6. Device (1, 33, 42, 50) according to Claim 1, characterised in that the inlet orifice is extended by a mechanical filter (23, 41) elongated around an axis, inserted into the molecular sieve and arranged so as to distribute the fluid radially inside said sieve.
  7. Device according to Claim 6, characterised in that the mechanical filter (41) is cylindrical.
  8. Device according to Claim 6, characterised in that the mechanical filter (23) is conical, the end of the cone being located towards the lower grid.
  9. Device according to any one of the preceding claims, characterised in that at least one fluid passage grid (20, 57, 85; 84, 94) is formed of a plate perforated with square or rectangular holes.
  10. Device according to any one of the preceding claims, characterised in that the lower grid (20, 85) and/or the upper grid (84, 94) have radial rigidifyng stays (21, 86), distributed angularly.
  11. Device according to any one of the preceding claims, characterised in that the obturating part has an outlet orifice (8, 78) for the fluid, connected to the space delimited by the hollow body by a dip tube (13, 80) passing through the filtering sieve.
  12. Device according to Claim 11, characterised in that the dip tube, for discharging the fluid, has its end (14, 81 ) open directly next to the bottom of the hollow body.
  13. Device according to any one of Claims 1 to 10, characterised in that an outlet orifice for the fluid is located at the bottom of the hollow body.
  14. Device according to Claim 11 or 12, characterised in that the dip tube is made of plastic material.
  15. Device according to any one of the preceding claims, characterised in that the molecular sieve (18, 83) has a cross section that is equal or substantially equal to that of the hollow body and extends over a given height.
  16. Device according to Claim 15, characterised in that the given height of the molecular sieve is comprised between half and nine-tenths of the height of the space delimited by the hollow body.
  17. Device according to any one of the preceding claims, characterised in that a felt sheet (62, 92) is inserted between the molecular sieve and the lower fluid passage grid.
  18. Device according to any one of the preceding claims, characterised in that the device has means for fixing the fluid inlet and outlet connection tubes, by clicking.
  19. Device according to any one of the preceding claims, characterised in that the hollow body (51) is a first half-shell provided with a cylindrical wall, and the obturating part (6, 43, 58) is a second half-shell formed of a single part by a bottom and a cylindrical wall inserted with friction into the first half-shell, to which it is fixed by bonding, the first half-shell being crimped to the periphery of the bottom of the second half-shell.
  20. Device according to Claim 19, characterised in that the molecular sieve is contained by the second half-shell.
  21. Device according to any one of the preceding claims, characterised in that the hollow body and the obturating part are made of aluminium alloy.
EP19990402765 1998-11-05 1999-11-05 Filtration apparatus and process for a cooling circuit Expired - Lifetime EP0999421B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9813948 1998-11-05
FR9813948A FR2785552B1 (en) 1998-11-05 1998-11-05 FILTRATION DEVICE FOR REFRIGERATION CIRCUIT AND FILTRATION METHOD USING SUCH A DEVICE

Publications (2)

Publication Number Publication Date
EP0999421A1 EP0999421A1 (en) 2000-05-10
EP0999421B1 true EP0999421B1 (en) 2002-02-13

Family

ID=9532414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990402765 Expired - Lifetime EP0999421B1 (en) 1998-11-05 1999-11-05 Filtration apparatus and process for a cooling circuit

Country Status (3)

Country Link
EP (1) EP0999421B1 (en)
DE (1) DE69900883T2 (en)
FR (1) FR2785552B1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE10234890A1 (en) * 2002-07-31 2004-02-19 Behr Gmbh & Co. Filter system for cleaning a medium, heat exchanger and refrigerant circuit

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US6616737B1 (en) 1999-10-07 2003-09-09 Stanhope Products Company Desiccant cartridge retention device
US6968713B2 (en) * 2004-03-12 2005-11-29 Halla Climate Control Canada, Inc. Desiccant cup with integral filter
DE102005023103B4 (en) * 2005-05-13 2009-02-26 Jahn Gmbh Umform- Und Zerspanungstechnik Dryer for a cooling medium in a cooling medium circuit, in particular for an air conditioning system of a vehicle
DE102005024167B4 (en) * 2005-05-23 2008-05-15 Jahn Gmbh Umform- Und Zerspanungstechnik Dryer for a cooling medium in a cooling medium circuit, in particular for an air conditioning system of a vehicle
DE102005024158C5 (en) 2005-05-23 2018-12-06 Jahn Gmbh Umform- Und Zerspanungstechnik Dryer for a cooling medium in a cooling medium circuit, in particular for an air conditioning system of a vehicle
DE102005033168B4 (en) 2005-07-13 2009-04-16 Jahn Gmbh Umform- Und Zerspanungstechnik Dryer for a cooling medium in a cooling medium circuit, in particular for an air conditioning system of a vehicle
DE102007051512A1 (en) 2007-10-29 2009-04-30 Jahn Gmbh Umform- Und Zerspanungstechnik Dryer for air conditioning system of vehicle, has insert for filtering and drying refrigerant arranged at inner side of housing between openings, where insert is provided with housing region with larger diameter than another housing region
EP2244041A1 (en) 2009-04-20 2010-10-27 Jahn GmbH Dryer for a coolant in a coolant circuit, in particular for a vehicle air conditioning system and accompanying coolant condenser assembly
ITMI20090878A1 (en) * 2009-05-19 2010-11-20 Aro Tubi Trafilerie S P A PROCESS OF OBTAINING DEVICES FOR THE TREATMENT OF REFRIGERANT FLUID IN REFRIGERATING MACHINES AND DEVICES SO OBTAINED
DE102013015072A1 (en) * 2013-07-01 2015-01-08 Liebherr-Hausgeräte Ochsenhausen GmbH Fridge and / or freezer
CN119269176B (en) * 2024-12-10 2025-03-11 河南环科环保技术有限公司 A water quality sampler and a water sampling method

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US2600435A (en) * 1948-11-29 1952-06-17 Samuel A Shapiro Freon 12 dehydrator and manifold
US5515696A (en) * 1994-08-10 1996-05-14 Eaton Corporation Receiver/drier/filter assembly
US5596882A (en) * 1995-03-13 1997-01-28 Eaton Corporation Receiver for refrigerant and method of making same

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Publication number Priority date Publication date Assignee Title
DE10234890A1 (en) * 2002-07-31 2004-02-19 Behr Gmbh & Co. Filter system for cleaning a medium, heat exchanger and refrigerant circuit

Also Published As

Publication number Publication date
EP0999421A1 (en) 2000-05-10
FR2785552A1 (en) 2000-05-12
DE69900883D1 (en) 2002-03-21
FR2785552B1 (en) 2001-05-18
DE69900883T2 (en) 2002-11-07

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