WO2020104629A1 - Thermostatic assembly, in particular a thermostatic cartridge - Google Patents

Thermostatic assembly, in particular a thermostatic cartridge

Info

Publication number
WO2020104629A1
WO2020104629A1 PCT/EP2019/082162 EP2019082162W WO2020104629A1 WO 2020104629 A1 WO2020104629 A1 WO 2020104629A1 EP 2019082162 W EP2019082162 W EP 2019082162W WO 2020104629 A1 WO2020104629 A1 WO 2020104629A1
Authority
WO
WIPO (PCT)
Prior art keywords
drawer
chamber
sealing part
peripheral
thermostatic
Prior art date
Application number
PCT/EP2019/082162
Other languages
French (fr)
Inventor
Frédéric JAGER
Original Assignee
Vernet
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vernet filed Critical Vernet
Publication of WO2020104629A1 publication Critical patent/WO2020104629A1/en

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
    • G05D23/1306—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids
    • G05D23/132—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element
    • G05D23/134—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element measuring the temperature of mixed fluid
    • G05D23/1346—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element measuring the temperature of mixed fluid with manual temperature setting means

Definitions

  • Thermostatic assembly in particular thermostatic cartridge
  • the present invention relates to a thermostatic assembly, in particular a thermostatic cartridge.
  • thermostatic element To regulate the temperature of a mixture of a hot fluid and a cold fluid, in particular a mixture of hot water and cold water in a sanitary installation, it is known to use a thermostatic element and a drawer, which are arranged in a hollow outer casing, typically a cartridge body to be attached to a tap body.
  • the thermostatic element comprises a piston, which is normally fixed relative to the envelope, and a thermosensitive body, relative to which the piston is displaceable in translation under the effect of a thermo-expansion of the thermostatic element and to which the drawer is secured.
  • the drawer is mounted movable in translation inside a chamber of the envelope so as to close, in respective inverse proportions, a hot fluid inlet passage and a cold fluid inlet passage which are delimited through the envelope and which open into the room.
  • the hot fluid and the cold fluid which the drawer lets pass to reach the chamber mix there and form, downstream of the drawer, a mixed fluid which leaves the envelope while flowing along the thermosensitive body of the element thermostatic.
  • the movement of the drawer inside the chamber which is controlled by the thermostatic element, must be as precise and as rapid as possible so that the stabilization of the temperature of the mixed fluid around a value of instruction is efficient.
  • the movements of the drawer inside the chamber must overcome the resistance produced by friction which is generated between a side wall of the chamber and a peripheral seal carried by the drawer, this seal being mounted compressed radially. between the drawer and the wall of the chamber so as to form a seal against the hot fluid and the cold fluid between the inlet passages of these fluids delimited by the envelope.
  • the object of the present invention is to provide a thermostatic assembly whose temperature regulation performance and reliability over time are improved.
  • the subject of the invention is a thermostatic assembly, as defined in claim 1.
  • One of the basic ideas of the invention is to arrange the outer periphery of the drawer to retain it, both when mounting the drawer in the envelope chamber and during axial movements of the drawer in this chamber for the purposes of thermostatic regulation, lubricant reserves which are arranged axially on either side of a peripheral sealing part which is provided with the drawer and which is designed to ensure, by radial compression against the side wall of the chamber, the sealing on the outside of the drawer between the hot fluid and cold fluid inlet passages.
  • the two corresponding peripheral arrangements of the drawer make it possible to trap, between each of them and the peripheral sealing part of the drawer, a large part of the lubricant which is applied to this peripheral sealing part of the drawer before the latter is introduced.
  • the lubricant thus trapped on either side of the peripheral sealing part of the drawer remains there during assembly of the drawer in the chamber and then during the operation of the thermostatic assembly, which substantially limits the resistance of friction between the drawer and the wall of the chamber and therefore significantly improves both the temperature regulation performance and the reliability over time of this thermostatic assembly.
  • many embodiments are possible for the two aforementioned peripheral arrangements of the drawer.
  • Figure 1 is a schematic longitudinal section of a thermostatic assembly according to the invention, produced in the form of a thermostatic cartridge;
  • Figure 2 is an enlarged view of part of Figure 1;
  • Figure 3 is a longitudinal section of a drawer of the cartridge of Figure 1, shown before its assembly with the rest of the cartridge;
  • Figure 4 is a view similar to Figure 3, illustrating an alternative embodiment of the drawer
  • Figure 5 and [Fig 6] Figure 6 are perspective views of two separate parts which, by assembly, give the drawer of Figure 4;
  • Figure 7 is a view similar to Figure 3, illustrating another variant of the drawer.
  • thermostatic cartridge 1 arranged around and along a central axis X-X.
  • This cartridge 1 is suitable for equipping a mixing valve to be supplied with hot water and cold water, not shown as such in the figures, or, more generally, for equipping an installation supplied with a hot fluid and a cold fluid with mix.
  • the cartridge 1 comprises, as the main external component, a hollow casing 10.
  • This envelope 10 has a generally tubular shape, which is centered on the axis X-X and which internally delimits a chamber 1 1 centered on the axis X-X.
  • the hot and cold water to be regulated by the cartridge 1 are intended to mix inside the chamber 1 1, forming mixed water therein.
  • the casing 10 comprises an upper housing 12 at the lower end of which is secured, here by screwing, a sleeve 13.
  • the chamber 11 extends both along the housing 12 and the socket 13.
  • the housing 12 and the socket 13 are intended to be mounted leaktight in the valve body aforementioned mixer, with interposition of O-rings, visible in Figure 1.
  • the embodiment of the envelope 1, here associating the housing 12 and the socket 13, is not limiting.
  • the casing 1 has lateral passages 14 and 15 which connect the outside of the casing 1 to the chamber 1 1.
  • the passage 14 is offset axially along the casing 1 relative to the passage 15, being, in particular at the level of the respective outlets of these passages 14 and 15 in the chamber 1 1, separated by a side wall 16 of the chamber 1 1.
  • each of the lateral passages 14 and 15 may include one or more radially passing openings, which extend in circumference arcs centered on the XX axis; or each of these passages 14 and 15 extends, at least in part, axially in the thickness of the side wall of the casing 1, opening out to the outside of this wall, via one or more orifices of various geometries, at an axial level different from that where the passage 14.15 opens into the chamber 11, also via one or more orifices of various geometries.
  • the lower passage 14 constitutes a hot water inlet passage by which the hot water enters the chamber 1 1 from outside the envelope 1
  • the upper passage 15 constitutes a passage cold water inlet by which cold water enters the chamber 1 1 from the outside of the envelope 1.
  • the latter has a mixed water discharge passage 17 which, in the embodiment considered here, is centered on the axis XX and is delimited by the socket 13.
  • the cartridge 1 also includes a drawer 20 mounted inside the chamber 1 1 movably along the axis X-X between two extreme positions, namely:
  • the lower seat 18 is formed by an upper end of the bush 13, while the upper seat 19 is formed by an intermediate shoulder of the housing 12.
  • the axial dimension of the drawer 20, separating one from the other its opposite axial faces, is less than the axial distance separating the seats 18 and 19 from each other, it is understood that, when the drawer 20 is in its extreme low position, the drawer completely closes the hot water inlet inside the chamber 11, while opening the cold water inlet into this chamber as far as possible via the passage 15. Conversely, when the drawer 20 is in its extreme high position, the drawer completely closes the cold water inlet inside the chamber 1 1, while opening the hot water inlet as much as possible. this chamber via the passage 16.
  • the cartridge 1 comprises a thermostatic element 30 which includes a thermosensitive body 31 and a piston 32, which, in the assembled state of the components of the cartridge, are substantially centered on the 'axis XX.
  • the thermostatic element 30 is designed so that its thermosensitive body 31 and its piston 32 move relative to one another along the axis XX, this relative displacement being controlled by a temperature variation applied to the thermosensitive body 31.
  • the thermosensitive body 31 contains for example a thermodilatable material which, during its expansion, causes the deployment of the piston 32 relative to the thermosensitive body 31 and which, during its contraction, allows the piston to retract with respect to the thermosensitive body.
  • thermo-actuation can be envisaged for the thermostatic element 30.
  • this thermosensitive body 31 is designed to be in contact with mixed water, being at least partially disposed in chamber 1 1 and / or in the mixed water discharge passage 17.
  • the heat-sensitive body 31 is integrally connected to the drawer 20, for example by screwing, it being emphasized that the embodiment of this connection between the drawer 20 and the heat-sensitive body 31 is not limiting and above all that this connection is understood to be a kinematic connection from one to the other for the purpose of moving the drawer to close, in respective inverse proportions, the passages 14 and 15.
  • the piston 32 is, in turn, connected to the casing 1 by a mechanism, referenced 40 and detailed below.
  • the temperature of the mixed water leaving the cartridge 1 is thermostatically regulated by the drawer 20 and the thermostatic element 30.
  • the temperature of the mixed water results directly from the respective quantities of hot and cold water admitted into the chamber 1 1 via the passages 14 and 15 respectively. more or less closed by the drawer 20, as explained above.
  • thermosensitive body 31 which causes the downward translation of the thermosensitive body 31 and therefore of the slide 20: the proportion of hot water through the passage 14 decreases while, conversely, the proportion of cold water through the passage 15 increases, which causes a mixed water temperature drop.
  • a compression spring 33 is provided to return the thermostatic body 31 and the piston 32 towards each other when the latter retracts, for example during a contraction of the thermodilatable material contained in the thermosensitive body 31.
  • this return spring 33 is interposed axially between the envelope 1 and the drawer 20.
  • the corrections of the temperature of the mixed water results in a regulation equilibrium for this temperature of the mixed water, and this at a thermostatic regulation temperature which depends on the position, imposed by the mechanism 40, of the piston 32 along the axis XX.
  • the mechanism 40 makes it possible to adjust the value of the thermostatic regulation temperature, by acting on the axial position of the piston 32.
  • this mechanism 40 comprises a stop 41, against which the upper end of the piston 32 is supported axially and which is slidably mounted, along the axis XX, inside a nut 42, with axial interposition between the stop 41 and the nut 42 of an overtravel spring 43.
  • the axial position of the nut 42 inside the casing 1 and, thereby, the altitude of the stop 41 can be modified by an adjusting screw 44, which is centered on the axis XX and whose upper end is intended to be linked in rotation with a maneuver, not shown in the figures.
  • the adjustment screw 44 is screwed into the nut 42, the latter being linked in rotation about the axis XX to the casing 1, typically by grooves.
  • the screw 44 is rotated on itself around the axis XX, the nut 42 translates along this axis, which causes the corresponding drive of the stop 41 via the overtravel spring 43, it being emphasized that this overtravel spring 43 is substantially stiffer than the return spring 33.
  • the adjustment mechanism 40 will not be described here further, it being understood that the reader may for this purpose refer to FR 2 869 087. It will be recalled that the embodiment of this mechanism 40 is not limitation of the invention: other embodiments are known in the art, for example in FR 2 921 709, FR 2 774 740 and FR 2 870 61 1. Furthermore, by way of a variant not shown, if it is dispensed with being able to adjust the value of the temperature at which the slide 20 regulates the mixing of hot and cold water, the mechanism 40 can be removed from the cartridge. 1, the piston 32 then being fixedly connected to the casing 10.
  • the drawer 20 comprises a main body 21 centered on an axis which, in the assembled state of the components of the cartridge 1, is aligned with the axis X-X.
  • the embodiment of the main body 21 is not limiting as long as this main body 21 ensures, at the same time, the connection of the slide 20 to the thermosensitive body 31 of the thermostatic element 30 and the respective closings, in respective proportions reverse, passages 14 and 15, as explained in detail above.
  • the drawer 20 also includes an O-ring 22 which is carried by the external lateral face of the main body 21.
  • the outer side face of the main body 21 defines a peripheral groove 23 inside which the O-ring 22 is received.
  • the arrangements of the main body 21 and / or of the seal 22, ensuring their assembly within the drawer 20 are not limiting as long as, in the assembled state of the cartridge 1, in particular when the drawer 20 is received in the chamber 1 1, the seal 22 is radially interposed between the main body 21 and the side wall 16 of the chamber 1 1: an outer peripheral part 22A of the seal 22 is then provided to be compressed, radially to the axis XX, against the wall 16 of chamber 1 1, so as to form a seal against hot water and cold water between passages 14 and 15.
  • the peripheral part 22A of the seal 22 impervious to one another the passages 14 and 15 outside the drawer 20.
  • the minimum compression of the part peripheral 22A of the joint 22 must be substantial and results from a dimensional differential between the wall 16 of the chamber 1 1 and the joint 22, namely that the diameter of the wall 16, denoted D16 in FIG. 2, is less than the diameter , denoted D22 in FIG. 3, presented by the peripheral part 22A of the seal 22 when the drawer 20 is out of the chamber 11.
  • the drawer 20 has a flow passage 24 connecting to each other the opposite axial faces of the drawer.
  • the flow passage 24 connecting to each other the opposite axial faces of the drawer.
  • the drawer 20 also includes two O-rings 25, which are distinct from the seal 22 and which are carried by the external lateral face of the main body 21.
  • the external lateral face of the main body 21 delimits two peripheral grooves 26, which are located axially on either side of the groove 23 and which respectively receive the seals 25.
  • the embodiment of the assembly between each of the seals 25 and the main body 21 is not limiting as long as each of the seals 25 forms a peripheral arrangement of the drawer 20 and that these seals 25 are located axially on either side of the seal 22.
  • each seals 25 forms a peripheral arrangement of the drawer 20 and that these seals 25 are located axially on either side of the seal 22.
  • each seals 25 forms a peripheral arrangement of the drawer 20 and that these seals 25 are located axially on either side of the seal 22.
  • the seal 25 is provided so that, when the slide 20 is out of the chamber 11, the seal 25 has a diameter, denoted D25 in FIG. 3, which is both less than the diameter D22 of the peripheral part 22A of the seal 22, as clearly visible in Figure 3, and substantially equal, that is to say equal to a functional clearance, to the diameter D16 of the wall 16 of the chamber 1 1: in this way, when the drawer 20 is mounted in the chamber 1 1, the seals 25 cooperate by adjusted contact with the wall 16 of the chamber, without being compressed radially against this wall 16 or by being pressed radially against this wall 16 only marginally compared to the strong minimum compression of the peripheral part 22A of the seal 22.
  • the seals 25 allow, during the assembly of the drawer to the rest of the cartridge 1 then during the operation of this cartridge, to retain, between each of these seals 25 and the peripheral part 22A of the seal 22, a reserve of lubricant, which is denoted R in FIGS. 2 and 3 and which runs over the entire outer periphery of the drawer 20.
  • the lubricant contained in each of these two reserves R is trapped on the peripheral part 22A of the seal 22 by the corresponding seal 25, the latter preventing both the lubricant contained in each reserve R from being swept against the wall 16 of the chamber 1 1 when the drawer 20 is introduced into this chamber when the cartridge 1 is assembled, and that the lubricant of each reserve R is not entrained by the water contained in the chamber 1 1 during the movements of the drawer 20 in the chamber to regulate the temperature of the mixed water.
  • FIG. 5 a variant of the drawer 20, referenced 60.
  • the drawer 60 is functionally similar to the drawer 20, but is distinguished by its structure. More specifically, the drawer 60, which is shown alone in FIG. 5, comprises a main body 61, which is functionally and, essentially, structurally similar to the main body 21 of the drawer 20.
  • the drawer 60 also includes a shape-shaped seal 62, which is shown alone in FIG. 6 and which, unlike the separate seals 22 and 25 of the drawer 20, integrates in one piece a sealing function, as provided by the seal 22 for the drawer 20, and a lubricant retaining function, as provided by the seals 25 for the drawer 20.
  • the shape seal 62 is carried by the external lateral face of the main body 61, by being for example received in a grooved peripheral groove 63 delimited by this external lateral face of the main body 61, it being understood that other embodiments can be envisaged for the assembly of the shape joint 62 on the main body 61.
  • the shape joint 62 includes at least three outer peripheral lips which are spaced from each other along the axis XX.
  • the shaped joint 62 thus includes a lip 64 and two lips 65 located axially on either side of the lip 64.
  • the lip 64 is, in the assembled state of the cartridge 1, compressed radially against the wall 16 of the chamber 1 1, so as to seal the passages 14 and 15 one vis-à-vis the 'other outside the drawer 20.
  • the lips 65 cooperate by adjusted contact with the wall 16 of the chamber 1 1 in the assembled state of the cartridge 1, so as to have a reserve of lubricant R between the lip 64 and each of the lips 65, as indicated in FIG. 4.
  • the shaped joint 62 is provided so that, when the drawer 60 is out of the chamber 1 1, the lip 64 has a diameter D64 greater than the diameter D16 of the wall 16 of the chamber 11, while each of the lips 65 has a diameter D65 which is both less than the diameter D64 of the lip 64 and substantially equal to the diameter D16 of the wall 16.
  • FIG. 7 to 8 a variant of drawers 20 and 60, referenced 80.
  • the drawer 80 is functionally similar to drawers 20 and 60, but is distinguished by its structure. More specifically, the drawer 80 is obtained by molding an insert 81 by an elastomer forming a layer 82, the insert 81 being represented alone in FIG. 8 while the elastomer layer 82 is represented alone in FIG. 9.
  • the insert 81 is functionally similar to the main bodies 21 and 61 of the drawers 20 and 60, while having the structural specificity that a peripheral part of this insert 81 is overmolded with elastomer forming the layer 82.
  • the insert 81 may be made of a metallic material or of a plastic material.
  • the elastomer layer 82 is functionally similar to the shape seal 62 in the sense that it integrates in one piece at least three outer peripheral lips, similar to the lips of the shape seal 62.
  • the elastomer layer 82 forms a lip 84, which, like lip 64, provides the above-mentioned sealing function, and two lips 85, which are located axially on either side and at a distance from the lip 84 and which, like the lips 65, perform the aforementioned function of retaining lubricant.
  • the elastomer layer 82 is provided so that, when the drawer 80 is outside of the chamber 11, the lip 84 has a diameter D84 which is greater than the diameter D16 of the wall 16 of the chamber, and each of the lips 85 has a diameter D85 which is both less than the diameter D84 of the lip 84 and substantially equal to the diameter D16 of the wall 16.
  • a reserve of lubricant R can be retained between the lip 84 and each of the lips 85.
  • the production of the drawer 80 by overmolding limits both the tolerance on the compression of the lip 84 against the wall 16 of the chamber 1 1 for ensure the sealing function, and the tolerance on the adjustment of the contact between the lips 85 and the wall 16 of the chamber 1 1 to ensure the lubricant retaining function.
  • the insert 81 delimits through passages 83 which, during the overmolding of the insert 81, are filled with the elastomer of the layer 82, allowing thus a reinforced mechanical attachment of the elastomer layer 82 on the insert 81.
  • the specific dimensions and arrangement for these through passages 83 are not limiting, the through passages 83 shown in Figures 7 and 8 n 'being just one example among many possibilities.
  • the insert 81 can be overmolded with the elastomer of the layer 82, with the interposition of a chemical binder d adhesion, such as an adhesive, a polymer reagent, etc.
  • the O-ring 22, the shape seal 62 and the elastomer layer 82 illustrate the various shapes that can take a sealing part, which is provided with the drawer 20, 60 or 80 and of which a peripheral part, such as the peripheral part 22A of the seal 22 or the lip 64 of the shape seal 62 or else the lip 84 of the elastomer layer 82, is compressed, radially to the axis XX, against the wall 16 of chamber 1 1 so as to form a seal against hot water and cold water between the inlet passages 14 and 15 in the assembled state of the cartridge 1.
  • peripheral arrangements of the drawer which make it possible to have the reserves of lubricant R, may as well be distinct from such a sealing part, as is the case for the seals 25, as they may be integrated in one piece with such a sealing part, as is the case for the lips 65 and the lips 85.
  • the drawer 20 and the thermostatic element 30, as well as if the mechanism 40 are assembled to each other in the form of a cartridge capable of being brought back in one taking place in a tap body, such as the cartridge 1 envisaged so far, the slide 20 and the thermostatic element 30, as well as if the mechanism 40, can be installed directly in a tap body, the latter then forming an envelope functionally similar to envelope 10.

Abstract

The thermostatic assembly comprises a casing (10), a thermostatic element which includes a temperature-sensitive body and a piston, moving with respect to one another along an axis (X-X) of the casing according to the temperature of the mixed fluid, and a slide valve (20) for controlling the temperature of the mixed fluid. The slide valve is connected to the temperature sensitive body in order to be moved along the axis inside a chamber (11) of the casing in order to close off, in respective inverse proportions, a hot fluid intake passage (14) and a cold fluid intake passage (15). The slide valve is provided with a sealing part (22) including a peripheral portion which is radially compressed against a wall (16) of the chamber, axially inserted between the intake passages, so as to form a seal between these passages. In order to improve the temperature control performance and reliability over time, the slide valve is also provided with two peripheral recesses (25) for trapping a lubricant on the peripheral portion of the sealing part, these peripheral recesses being axially situated on both sides of the peripheral portion of the sealing part and being suitable for cooperating by adjusted contact with the wall of the chamber in such a way as to have a reserve of lubricant (R) between the peripheral portion of the sealing part and each peripheral recess.

Description

Ensemble thermostatique, notamment cartouche thermostatique  Thermostatic assembly, in particular thermostatic cartridge
La présente invention concerne un ensemble thermostatique, notamment une cartouche thermostatique. The present invention relates to a thermostatic assembly, in particular a thermostatic cartridge.
Pour réguler en température un mélange d’un fluide chaud et d’un fluide froid, notamment un mélange d’eau chaude et d’eau froide dans une installation sanitaire, il est connu d’utiliser un élément thermostatique et un tiroir, qui sont agencés dans une enveloppe externe creuse, typiquement un corps de cartouche à rapporter dans un corps de robinet. L’élément thermostatique comprend un piston, qui est normalement fixe par rapport à l’enveloppe, et un corps thermosensible, par rapport auquel le piston est déplaçable en translation sous l’effet d’une thermo-dilatation de l’élément thermostatique et auquel le tiroir est solidaire. Le tiroir est monté déplaçable en translation à l’intérieur d’une chambre de l’enveloppe de façon à obturer, en des proportions respectives inverses, un passage d’arrivée de fluide chaud et un passage d’arrivée de fluide froid qui sont délimités par l’enveloppe et qui débouchent dans la chambre. Le fluide chaud et le fluide froid que le tiroir laisse passer pour atteindre la chambre s’y mélangent et forment, en aval du tiroir, un fluide mitigé qui sort de l’enveloppe en s’écoulant le long du corps thermosensible de l’élément thermostatique. En modifiant la position du piston par rapport à l’enveloppe, généralement au moyen d’un mécanisme de réglage ad hoc, on peut fixer la température de régulation thermostatique, c’est-à-dire la température d’équilibrage autour de laquelle est régulée la température du fluide mitigé. Un exemple de ce type de cartouche est fourni par WO 2013/083703.  To regulate the temperature of a mixture of a hot fluid and a cold fluid, in particular a mixture of hot water and cold water in a sanitary installation, it is known to use a thermostatic element and a drawer, which are arranged in a hollow outer casing, typically a cartridge body to be attached to a tap body. The thermostatic element comprises a piston, which is normally fixed relative to the envelope, and a thermosensitive body, relative to which the piston is displaceable in translation under the effect of a thermo-expansion of the thermostatic element and to which the drawer is secured. The drawer is mounted movable in translation inside a chamber of the envelope so as to close, in respective inverse proportions, a hot fluid inlet passage and a cold fluid inlet passage which are delimited through the envelope and which open into the room. The hot fluid and the cold fluid which the drawer lets pass to reach the chamber mix there and form, downstream of the drawer, a mixed fluid which leaves the envelope while flowing along the thermosensitive body of the element thermostatic. By modifying the position of the piston relative to the casing, generally by means of an ad hoc adjustment mechanism, it is possible to set the thermostatic regulation temperature, that is to say the equilibration temperature around which is regulated the temperature of the mixed fluid. An example of this type of cartridge is provided by WO 2013/083703.
Le déplacement du tiroir à l’intérieur de la chambre, qui est commandé par l’élément thermostatique, se doit d’être le plus précis et le plus rapide possible afin que la stabilisation de la température du fluide mitigé autour d’une valeur de consigne soit performante. En pratique, les mouvements du tiroir à l’intérieur de la chambre doivent vaincre la résistance produite par des frottements qui sont générés entre une paroi latérale de la chambre et un joint d’étanchéité périphérique porté par le tiroir, ce joint étant monté comprimé radialement entre le tiroir et la paroi de la chambre de manière à former une étanchéité au fluide chaud et au fluide froid entre les passages d’arrivée de ces fluides délimités par l’enveloppe.  The movement of the drawer inside the chamber, which is controlled by the thermostatic element, must be as precise and as rapid as possible so that the stabilization of the temperature of the mixed fluid around a value of instruction is efficient. In practice, the movements of the drawer inside the chamber must overcome the resistance produced by friction which is generated between a side wall of the chamber and a peripheral seal carried by the drawer, this seal being mounted compressed radially. between the drawer and the wall of the chamber so as to form a seal against the hot fluid and the cold fluid between the inlet passages of these fluids delimited by the envelope.
Pour tenter de réduire ces frottements, il est connu d’appliquer un lubrifiant sur le joint d’étanchéité du tiroir avant que ce dernier ne soit monté à l’intérieur de la chambre. Cette solution donne des résultats limités car, d’une part, le lubrifiant appliqué sur le joint est partiellement enlevé lors de l’assemblage, en restant collé à l’enveloppe avant que le tiroir soit en position fonctionnelle et, d’autre part, les déplacements du tiroir lors du fonctionnement étalent le lubrifiant sur la paroi latérale de la chambre d’où il est rapidement emmené par le fluide contenu dans la chambre. Il en résulte que, dès la mise en service, les frottements du tiroir à l’intérieur de la chambre sont substantiels, ce qui dégrade la qualité de la régulation thermostatique de la température du fluide mitigé et ce qui augmente l’hystérésis de l’élément thermostatique et donc en réduit la durée de vie par défaut de fiabilité dans le temps. In an attempt to reduce this friction, it is known to apply a lubricant to the drawer gasket before the latter is mounted inside the chamber. This solution gives limited results because, on the one hand, the lubricant applied to the joint is partially removed during assembly, remaining bonded to the envelope before the drawer is in the functional position and, on the other hand, the movements of the drawer during operation spread the lubricant on the side wall of the chamber from which it is quickly taken away by the fluid contained in the chamber. As a result, as soon as it is put into service, the friction of the drawer inside the chamber is substantial, which degrades the quality of the thermostatic regulation of the temperature of the mixed fluid and which increases the hysteresis of the thermostatic element and therefore reduces its lifespan by default of reliability over time.
Le but de la présente invention est de proposer un ensemble thermostatique dont les performances de régulation en température et la fiabilité dans le temps sont améliorées.  The object of the present invention is to provide a thermostatic assembly whose temperature regulation performance and reliability over time are improved.
A cet effet, l’invention a pour objet un ensemble thermostatique, tel que défini à la revendication 1.  To this end, the subject of the invention is a thermostatic assembly, as defined in claim 1.
Une des idées à la base de l’invention est d’aménager la périphérie extérieure du tiroir pour y retenir, tant lors du montage du tiroir dans la chambre de l’enveloppe que lors des mouvements axiaux du tiroir dans cette chambre aux fins de la régulation thermostatique, des réserves de lubrifiant qui sont disposées axialement de part et d’autre d’une partie périphérique d’étanchéité dont est pourvu le tiroir et qui est prévue pour assurer, par compression radiale contre la paroi latérale de la chambre, l’étanchéité à l’extérieur du tiroir entre les passages d’arrivée de fluide chaud et de fluide froid. Les deux aménagements périphériques correspondants du tiroir permettent de piéger, entre chacun d’eux et la partie périphérique d’étanchéité du tiroir, une grande partie du lubrifiant qui est appliquée sur cette partie périphérique d’étanchéité du tiroir avant que ce dernier ne soit introduit dans la chambre lors de l’assemblage de l’ensemble thermostatique conforme à l’invention : le lubrifiant ainsi piégé de part et d’autre de la partie périphérique d’étanchéité du tiroir y reste lors du montage du tiroir dans la chambre puis lors du fonctionnement de l’ensemble thermostatique, ce qui limite substantiellement la résistance des frottements entre le tiroir et la paroi de la chambre et donc améliore significativement à la fois les performances de régulation en température et la fiabilité dans le temps de cet ensemble thermostatique. En pratique, comme détaillé par la suite, de nombreuses formes de réalisation sont envisageables pour les deux aménagements périphériques précités du tiroir. Dans tous les cas, ces aménagements périphériques sont prévus pour ne pas eux- mêmes générer des frottements contre la paroi de la chambre qui induiraient une résistance sensible aux mouvements du tiroir : l’invention prévoit que, à l’état assemblé de l’ensemble thermostatique, le contact entre chacun de ces aménagements périphériques et la paroi de la chambre n’est pas radialement pressant mais est simplement ajusté. Des caractéristiques optionnelles avantageuses de l’ensemble thermostatique conforme à l’invention sont spécifiées aux autres revendications. One of the basic ideas of the invention is to arrange the outer periphery of the drawer to retain it, both when mounting the drawer in the envelope chamber and during axial movements of the drawer in this chamber for the purposes of thermostatic regulation, lubricant reserves which are arranged axially on either side of a peripheral sealing part which is provided with the drawer and which is designed to ensure, by radial compression against the side wall of the chamber, the sealing on the outside of the drawer between the hot fluid and cold fluid inlet passages. The two corresponding peripheral arrangements of the drawer make it possible to trap, between each of them and the peripheral sealing part of the drawer, a large part of the lubricant which is applied to this peripheral sealing part of the drawer before the latter is introduced. in the chamber during assembly of the thermostatic assembly according to the invention: the lubricant thus trapped on either side of the peripheral sealing part of the drawer remains there during assembly of the drawer in the chamber and then during the operation of the thermostatic assembly, which substantially limits the resistance of friction between the drawer and the wall of the chamber and therefore significantly improves both the temperature regulation performance and the reliability over time of this thermostatic assembly. In practice, as detailed below, many embodiments are possible for the two aforementioned peripheral arrangements of the drawer. In all cases, these peripheral arrangements are provided so as not to themselves generate friction against the wall of the chamber which would induce a resistance which is sensitive to the movements of the drawer: the invention provides that, in the assembled state of the assembly thermostatic, the contact between each of these peripheral arrangements and the wall of the chamber is not radially pressing but is simply adjusted. Advantageous optional characteristics of the thermostatic assembly according to the invention are specified in the other claims.
L’invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d’exemple et faite en se référant aux dessins sur lesquels :  The invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the drawings in which:
- [Fig 1] la figure 1 est une coupe longitudinale schématique d’un ensemble thermostatique conforme à l’invention, réalisé sous forme d’une cartouche thermostatique ;  - [Fig 1] Figure 1 is a schematic longitudinal section of a thermostatic assembly according to the invention, produced in the form of a thermostatic cartridge;
- [Fig 2] la figure 2 est une vue à plus grande échelle d’une partie de la figure 1 ; - [Fig 2] Figure 2 is an enlarged view of part of Figure 1;
- [Fig 3] la figure 3 est une coupe longitudinale d’un tiroir de la cartouche de la figure 1 , montré avant son assemblage au reste de la cartouche ; - [Fig 3] Figure 3 is a longitudinal section of a drawer of the cartridge of Figure 1, shown before its assembly with the rest of the cartridge;
- [Fig 4] la figure 4 est une vue similaire à la figure 3, illustrant une variante de réalisation du tiroir ;  - [Fig 4] Figure 4 is a view similar to Figure 3, illustrating an alternative embodiment of the drawer;
- [Fig 5] la figure 5 et [Fig 6] la figure 6 sont des vues en perspective de deux pièces distinctes qui, par assemblage, donnent le tiroir de la figure 4 ;  - [Fig 5] Figure 5 and [Fig 6] Figure 6 are perspective views of two separate parts which, by assembly, give the drawer of Figure 4;
- [Fig 7] la figure 7 est une vue similaire à la figure 3, illustrant une autre variante du tiroir ; et  - [Fig 7] Figure 7 is a view similar to Figure 3, illustrating another variant of the drawer; and
- [Fig 8] la figure 8 et [Fig 9] la figure 9 sont des demi-coupes en perspective de deux parties distinctes du tiroir de la figure 7.  - [Fig 8] Figure 8 and [Fig 9] Figure 9 are perspective half-sections of two separate parts of the drawer of Figure 7.
Sur les figures 1 et 2 est représentée une cartouche thermostatique 1 agencée autour et le long d’un axe central X-X. Cette cartouche 1 est adaptée pour équiper un robinet mitigeur à alimenter en eau chaude et en eau froide, non représenté en tant que tel sur les figures, ou, plus généralement, pour équiper une installation alimentée en un fluide chaud et en un fluide froid à mélanger.  In Figures 1 and 2 is shown a thermostatic cartridge 1 arranged around and along a central axis X-X. This cartridge 1 is suitable for equipping a mixing valve to be supplied with hot water and cold water, not shown as such in the figures, or, more generally, for equipping an installation supplied with a hot fluid and a cold fluid with mix.
La cartouche 1 comporte, en tant que composant externe principal, une enveloppe 10 creuse. Cette enveloppe 10 présente une forme globalement tubulaire, qui est centrée sur l’axe X-X et qui délimite intérieurement une chambre 1 1 centrée sur l’axe X-X. L’eau chaude et l’eau froide à réguler par la cartouche 1 sont prévues pour se mélanger à l’intérieur de la chambre 1 1 , en y formant une eau mitigée.  The cartridge 1 comprises, as the main external component, a hollow casing 10. This envelope 10 has a generally tubular shape, which is centered on the axis X-X and which internally delimits a chamber 1 1 centered on the axis X-X. The hot and cold water to be regulated by the cartridge 1 are intended to mix inside the chamber 1 1, forming mixed water therein.
Par commodité, la suite de la description est orientée par rapport à l’axe X-X, dans le sens où les termes « supérieur » et « haut » correspondent à une orientation axiale tournée vers la partie haute des figures, tandis que les termes « inférieur » et « bas » correspondent à une direction axiale de sens opposé.  For convenience, the rest of the description is oriented with respect to the axis XX, in the sense that the terms “upper” and “top” correspond to an axial orientation facing the upper part of the figures, while the terms “lower "And" bottom "correspond to an axial direction of opposite direction.
Dans l’exemple de réalisation considéré sur les figures, l’enveloppe 10 comporte un boîtier supérieur 12 à l’extrémité inférieure duquel est solidarisée, ici par vissage, une douille 13. La chambre 1 1 s’étend à la fois le long du boîtier 12 et de la douille 13. Le boîtier 12 et la douille 13 sont destinés à être montés étanches dans le corps du robinet mitigeur précité, avec interposition de joints toriques, visibles sur la figure 1 . La forme de réalisation de l’enveloppe 1 , associant ici le boîtier 12 et la douille 13, n’est pas limitative. In the embodiment considered in the figures, the casing 10 comprises an upper housing 12 at the lower end of which is secured, here by screwing, a sleeve 13. The chamber 11 extends both along the housing 12 and the socket 13. The housing 12 and the socket 13 are intended to be mounted leaktight in the valve body aforementioned mixer, with interposition of O-rings, visible in Figure 1. The embodiment of the envelope 1, here associating the housing 12 and the socket 13, is not limiting.
L’enveloppe 1 présente des passages latéraux 14 et 15 qui relient l’extérieur de l’enveloppe 1 à la chambre 1 1 . Le passage 14 est décalé axialement le long de l’enveloppe 1 par rapport au passage 15, en étant, notamment au niveau des débouchés respectifs de ces passages 14 et 15 dans la chambre 1 1 , séparé par une paroi latérale 16 de la chambre 1 1. En pratique, la forme de réalisation de chacun des passages latéraux 14 et 15 n’est pas limitative : à titre d’exemple, chacun de ces passages 14 et 15 peut inclure une ou plusieurs lumières radialement traversantes, qui s’étendent en arcs de circonférence centrés sur l’axe X-X ; ou bien chacun de ces passages 14 et 15 s’étend, au moins en partie, axialement dans l’épaisseur de la paroi latérale de l’enveloppe 1 , en débouchant à l’extérieur de cette paroi, via un ou plusieurs orifices de diverses géométries, à un niveau axial différent de celui où débouche le passage 14,15 dans la chambre 1 1 , également via un ou plusieurs orifices de géométries diverses. Dans tous les cas, le passage inférieur 14 constitue un passage d’arrivée d’eau chaude par lequel l’eau chaude pénètre dans la chambre 1 1 depuis l’extérieur de l’enveloppe 1 , tandis que le passage supérieur 15 constitue un passage d’arrivée d’eau froide par lequel l’eau froide pénètre dans la chambre 1 1 depuis l’extérieur de l’enveloppe 1 .  The casing 1 has lateral passages 14 and 15 which connect the outside of the casing 1 to the chamber 1 1. The passage 14 is offset axially along the casing 1 relative to the passage 15, being, in particular at the level of the respective outlets of these passages 14 and 15 in the chamber 1 1, separated by a side wall 16 of the chamber 1 1. In practice, the embodiment of each of the lateral passages 14 and 15 is not limiting: by way of example, each of these passages 14 and 15 may include one or more radially passing openings, which extend in circumference arcs centered on the XX axis; or each of these passages 14 and 15 extends, at least in part, axially in the thickness of the side wall of the casing 1, opening out to the outside of this wall, via one or more orifices of various geometries, at an axial level different from that where the passage 14.15 opens into the chamber 11, also via one or more orifices of various geometries. In all cases, the lower passage 14 constitutes a hot water inlet passage by which the hot water enters the chamber 1 1 from outside the envelope 1, while the upper passage 15 constitutes a passage cold water inlet by which cold water enters the chamber 1 1 from the outside of the envelope 1.
Pour permettre à l’eau mitigée contenue dans la chambre 1 1 de sortir de l’enveloppe 1 , cette dernière présente un passage d’évacuation d’eau mitigée 17 qui, dans l’exemple de réalisation considéré ici, est centré sur l’axe X-X et est délimité par la douille 13.  To allow the mixed water contained in the chamber 1 1 to leave the envelope 1, the latter has a mixed water discharge passage 17 which, in the embodiment considered here, is centered on the axis XX and is delimited by the socket 13.
La cartouche 1 comporte également un tiroir 20 monté à l’intérieur de la chambre 1 1 de manière mobile suivant l’axe X-X entre deux positions extrêmes, à savoir :  The cartridge 1 also includes a drawer 20 mounted inside the chamber 1 1 movably along the axis X-X between two extreme positions, namely:
- une position extrême basse, dans laquelle une extrémité axiale inférieure du tiroir 20 est en appui contre un siège annulaire 18, qui est porté fixement par l’enveloppe 1 et qui situé, suivant l’axe X-X, sensiblement au niveau du débouché du passage 14 à l’intérieur de la chambre 1 1 , et  - An extreme low position, in which a lower axial end of the drawer 20 is in abutment against an annular seat 18, which is fixedly carried by the casing 1 and which located, along the axis XX, substantially at the outlet of the passage 14 inside the chamber 1 1, and
- une position extrême haute, dans laquelle une extrémité axiale supérieure du tiroir 20 est en appui contre un siège annulaire 19, qui est porté fixement par l’enveloppe 1 et qui est situé, suivant l’axe X-X, sensiblement au niveau du débouché du passage 15 à l’intérieur de la chambre 1 1 .  - an extreme high position, in which an upper axial end of the drawer 20 is in abutment against an annular seat 19, which is fixedly carried by the casing 1 and which is located, along the axis XX, substantially at the outlet of the passage 15 inside the chamber 1 1.
Dans l’exemple de réalisation considéré ici, et comme bien visible sur la figure 2, le siège inférieur 18 est formé par une extrémité supérieure de la douille 13, tandis que le siège supérieur 19 est formé par un épaulement intermédiaire du boîtier 12. Dans la mesure où la dimension axiale du tiroir 20, séparant l’une de l’autre ses faces axiales opposées, est inférieure à la distance axiale séparant l’un de l’autre les sièges 18 et 19, on comprend que, lorsque le tiroir 20 est dans sa position extrême basse, le tiroir ferme totalement l’admission d’eau chaude à l’intérieur de la chambre 1 1 , tout en ouvrant au maximum l’admission d’eau froide dans cette chambre via le passage 15. A l’inverse, lorsque le tiroir 20 est dans sa position extrême haute, le tiroir ferme totalement l’admission d’eau froide à l’intérieur de la chambre 1 1 , tout en ouvrant au maximum l’admission d’eau chaude dans cette chambre via le passage 16. Bien entendu, selon la position du tiroir 20 le long de l’axe X-X entre ses positions extrêmes haute et basse, les obturations respectives des passages 14 et 15 varient de manière inverse, ce qui revient à dire que les quantités d’eau chaude et d’eau froide admises à l’intérieur de la chambre 1 1 sont régulées, en des proportions respectives inverses, par le tiroir 20 selon sa position axiale. Sur les figures 1 et 2, le tiroir 20 occupe une position intermédiaire entre ses positions extrêmes haute et basse. In the embodiment considered here, and as clearly visible in FIG. 2, the lower seat 18 is formed by an upper end of the bush 13, while the upper seat 19 is formed by an intermediate shoulder of the housing 12. Insofar as the axial dimension of the drawer 20, separating one from the other its opposite axial faces, is less than the axial distance separating the seats 18 and 19 from each other, it is understood that, when the drawer 20 is in its extreme low position, the drawer completely closes the hot water inlet inside the chamber 11, while opening the cold water inlet into this chamber as far as possible via the passage 15. Conversely, when the drawer 20 is in its extreme high position, the drawer completely closes the cold water inlet inside the chamber 1 1, while opening the hot water inlet as much as possible. this chamber via the passage 16. Of course, depending on the position of the slide 20 along the axis XX between its extreme high and low positions, the respective closings of the passages 14 and 15 vary inversely, which amounts to saying that the quantities of hot and cold water admitted inside the chamber 1 1 are regulated, in d es respective inverse proportions, by the slide 20 according to its axial position. In FIGS. 1 and 2, the slide 20 occupies an intermediate position between its high and low end positions.
Pour entraîner le tiroir 20 en translation suivant l’axe X-X, la cartouche 1 comporte un élément thermostatique 30 qui inclut un corps thermosensible 31 et un piston 32, qui, à l’état assemblé des composants de la cartouche, sont sensiblement centrés sur l’axe X-X. L’élément thermostatique 30 est conçu pour que son corps thermosensible 31 et son piston 32 se déplacent l’un par rapport à l’autre suivant l’axe X-X, ce déplacement relatif étant commandé par une variation de température appliquée au corps thermosensible 31. Pour ce faire, le corps thermosensible 31 contient par exemple une matière thermodilatable qui, lors de sa dilatation, provoque le déploiement du piston 32 par rapport au corps thermosensible 31 et qui, lors de sa contraction, permet l’escamotage du piston par rapport au corps thermosensible. D’autres formes de thermo-actionnement sont envisageables pour l’élément thermostatique 30. Dans tous les cas, afin que le déplacement axial relatif entre le corps thermosensible 31 et le piston 32 soit commandé par la température de l’eau mitigée contenue dans la chambre 1 1 , ce corps thermosensible 31 est agencé pour être en contact avec l’eau mitigée, en étant au moins partiellement disposé dans la chambre 1 1 et/ou dans le passage d’évacuation d’eau mitigée 17.  To drive the slide 20 in translation along the axis XX, the cartridge 1 comprises a thermostatic element 30 which includes a thermosensitive body 31 and a piston 32, which, in the assembled state of the components of the cartridge, are substantially centered on the 'axis XX. The thermostatic element 30 is designed so that its thermosensitive body 31 and its piston 32 move relative to one another along the axis XX, this relative displacement being controlled by a temperature variation applied to the thermosensitive body 31. To do this, the thermosensitive body 31 contains for example a thermodilatable material which, during its expansion, causes the deployment of the piston 32 relative to the thermosensitive body 31 and which, during its contraction, allows the piston to retract with respect to the thermosensitive body. Other forms of thermo-actuation can be envisaged for the thermostatic element 30. In all cases, so that the relative axial displacement between the thermosensitive body 31 and the piston 32 is controlled by the temperature of the mixed water contained in the chamber 1 1, this thermosensitive body 31 is designed to be in contact with mixed water, being at least partially disposed in chamber 1 1 and / or in the mixed water discharge passage 17.
Le corps thermosensible 31 est relié solidairement au tiroir 20, par exemple par vissage, étant souligné que la forme de réalisation de cette solidarisation entre le tiroir 20 et le corps thermosensible 31 n’est pas limitative et surtout que cette solidarisation s’entend comme étant une liaison cinématique de l’un à l’autre aux fins du déplacement du tiroir pour obturer, en des proportions respectives inverses, les passages 14 et 15. Le piston 32 est, quant à lui, relié à l’enveloppe 1 par un mécanisme, référencé 40 et détaillé plus loin. The heat-sensitive body 31 is integrally connected to the drawer 20, for example by screwing, it being emphasized that the embodiment of this connection between the drawer 20 and the heat-sensitive body 31 is not limiting and above all that this connection is understood to be a kinematic connection from one to the other for the purpose of moving the drawer to close, in respective inverse proportions, the passages 14 and 15. The piston 32 is, in turn, connected to the casing 1 by a mechanism, referenced 40 and detailed below.
Dans l’hypothèse où le mécanisme 40 maintient fixe la position du piston 32 le long de l’axe X-X par rapport à l’enveloppe 1 , la température de l’eau mitigée en sortie de la cartouche 1 est régulée de manière thermostatique par le tiroir 20 et l’élément thermostatique 30. En effet, dans cette hypothèse, la température de l’eau mitigée résulte directement des quantités respectives d’eau chaude et d’eau froide admises dans la chambre 1 1 via respectivement les passages 14 et 15 plus ou moins obturés par le tiroir 20, comme expliqué précédemment. Si l’alimentation de la cartouche en eau chaude et/ou en eau froide est perturbée et que, par exemple, la température de l’eau mitigée augmente, le piston 32 se déploie axialement par rapport au corps thermosensible 31 , ce qui provoque la translation vers le bas du corps thermosensible 31 et donc du tiroir 20 : la proportion d’eau chaude à travers le passage 14 diminue tandis que, à l’inverse, la proportion d’eau froide à travers le passage 15 augmente, ce qui entraîne une baisse de la température de l’eau mitigée. Une réaction inverse se produit lorsque la température de l’eau mitigée diminue, étant remarqué qu’un ressort de compression 33 est prévu pour rappeler l’un vers l’autre le corps thermostatique 31 et le piston 32 lorsque ce dernier s’escamote, par exemple lors d’une contraction de la matière thermodilatable contenue dans le corps thermosensible 31. Dans l’exemple de réalisation considéré sur les figures, ce ressort de rappel 33 est interposé axialement entre l’enveloppe 1 et le tiroir 20. Les corrections de la température de l’eau mitigée aboutissent à un équilibre de régulation pour cette température de l’eau mitigée, et ce à une température de régulation thermostatique qui dépend de la position, imposée par le mécanisme 40, du piston 32 le long de l’axe X-X.  In the event that the mechanism 40 maintains fixed the position of the piston 32 along the axis XX relative to the casing 1, the temperature of the mixed water leaving the cartridge 1 is thermostatically regulated by the drawer 20 and the thermostatic element 30. In fact, in this hypothesis, the temperature of the mixed water results directly from the respective quantities of hot and cold water admitted into the chamber 1 1 via the passages 14 and 15 respectively. more or less closed by the drawer 20, as explained above. If the supply of the cartridge with hot and / or cold water is disturbed and if, for example, the temperature of the mixed water increases, the piston 32 is deployed axially with respect to the thermosensitive body 31, which causes the downward translation of the thermosensitive body 31 and therefore of the slide 20: the proportion of hot water through the passage 14 decreases while, conversely, the proportion of cold water through the passage 15 increases, which causes a mixed water temperature drop. A reverse reaction occurs when the temperature of the mixed water decreases, it being noted that a compression spring 33 is provided to return the thermostatic body 31 and the piston 32 towards each other when the latter retracts, for example during a contraction of the thermodilatable material contained in the thermosensitive body 31. In the embodiment considered in the figures, this return spring 33 is interposed axially between the envelope 1 and the drawer 20. The corrections of the temperature of the mixed water results in a regulation equilibrium for this temperature of the mixed water, and this at a thermostatic regulation temperature which depends on the position, imposed by the mechanism 40, of the piston 32 along the axis XX.
Le mécanisme 40 permet de régler la valeur de la température de régulation thermostatique, en agissant sur la position axiale du piston 32. Dans l’exemple de réalisation considéré ici, ce mécanisme 40 comporte une butée 41 , contre laquelle l’extrémité supérieure du piston 32 est appuyée axialement et qui est montée coulissante, suivant l’axe X-X, à l’intérieur d’un écrou 42, avec interposition axiale entre la butée 41 et l’écrou 42 d’un ressort de surcourse 43. La position axiale de l’écrou 42 à l’intérieur de l’enveloppe 1 et, par-là, l’altitude de la butée 41 , sont modifiables par une vis de réglage 44, qui est centrée sur l’axe X-X et dont une extrémité supérieure est destinée à être liée en rotation avec une manette de manoeuvre, non représentée sur les figures. A son extrémité inférieure, la vis de réglage 44 est vissée dans l’écrou 42, ce dernier étant lié en rotation autour de l’axe X-X à l’enveloppe 1 , typiquement par des cannelures. Ainsi, lorsque la vis 44 est entraînée en rotation sur elle-même autour de l’axe X-X, l’écrou 42 se translate suivant cet axe, ce qui provoque l’entraînement correspondant de la butée 41 par l’intermédiaire du ressort de surcourse 43, étant souligné que ce ressort de surcourse 43 est substantiellement plus raide que le ressort de rappel 33. The mechanism 40 makes it possible to adjust the value of the thermostatic regulation temperature, by acting on the axial position of the piston 32. In the embodiment considered here, this mechanism 40 comprises a stop 41, against which the upper end of the piston 32 is supported axially and which is slidably mounted, along the axis XX, inside a nut 42, with axial interposition between the stop 41 and the nut 42 of an overtravel spring 43. The axial position of the nut 42 inside the casing 1 and, thereby, the altitude of the stop 41, can be modified by an adjusting screw 44, which is centered on the axis XX and whose upper end is intended to be linked in rotation with a maneuver, not shown in the figures. At its lower end, the adjustment screw 44 is screwed into the nut 42, the latter being linked in rotation about the axis XX to the casing 1, typically by grooves. Thus, when the screw 44 is rotated on itself around the axis XX, the nut 42 translates along this axis, which causes the corresponding drive of the stop 41 via the overtravel spring 43, it being emphasized that this overtravel spring 43 is substantially stiffer than the return spring 33.
La structure et le fonctionnement du mécanisme de réglage 40 ne seront pas décrits ici plus avant, étant entendu que le lecteur pourra à cette fin se reporter à FR 2 869 087. On rappelle que la forme de réalisation de ce mécanisme 40 n’est pas limitative de l’invention : d’autres formes de réalisation sont connues dans la technique, par exemple dans FR 2 921 709, FR 2 774 740 et FR 2 870 61 1 . Par ailleurs, à titre de variante non représentée, si on renonce à pouvoir régler la valeur de la température à laquelle le tiroir 20 régule le mélange de l’eau chaude et de l’eau froide, le mécanisme 40 peut être supprimé de la cartouche 1 , le piston 32 étant alors relié fixement à l’enveloppe 10.  The structure and operation of the adjustment mechanism 40 will not be described here further, it being understood that the reader may for this purpose refer to FR 2 869 087. It will be recalled that the embodiment of this mechanism 40 is not limitation of the invention: other embodiments are known in the art, for example in FR 2 921 709, FR 2 774 740 and FR 2 870 61 1. Furthermore, by way of a variant not shown, if it is dispensed with being able to adjust the value of the temperature at which the slide 20 regulates the mixing of hot and cold water, the mechanism 40 can be removed from the cartridge. 1, the piston 32 then being fixedly connected to the casing 10.
On revient maintenant à une description plus détaillée du tiroir 20, en se référant plus spécifiquement aux figures 2 et 3, la figure 3 montrant seul le tiroir 2 lorsque ce tiroir est hors de la chambre 1 1 , notamment avant que le tiroir ne soit monté dans cette chambre 1 1 .  We now come back to a more detailed description of the drawer 20, with more specific reference to Figures 2 and 3, Figure 3 showing only the drawer 2 when this drawer is out of the chamber 1 1, in particular before the drawer is mounted in this room 1 1.
Ainsi, comme bien visible sur les figures 2 et 3, le tiroir 20 comporte un corps principal 21 centré sur un axe qui, à l’état assemblé des composants de la cartouche 1 , est aligné avec l’axe X-X. La forme de réalisation du corps principal 21 n’est pas limitative du moment que ce corps principal 21 assure, à la fois, la liaison du tiroir 20 au corps thermosensible 31 de l’élément thermostatique 30 et les obturations respectives, en des proportions respectives inverses, des passages 14 et 15, comme expliqué en détail plus haut.  Thus, as clearly visible in FIGS. 2 and 3, the drawer 20 comprises a main body 21 centered on an axis which, in the assembled state of the components of the cartridge 1, is aligned with the axis X-X. The embodiment of the main body 21 is not limiting as long as this main body 21 ensures, at the same time, the connection of the slide 20 to the thermosensitive body 31 of the thermostatic element 30 and the respective closings, in respective proportions reverse, passages 14 and 15, as explained in detail above.
Le tiroir 20 comporte également un joint torique 22 qui est porté par la face latérale extérieure du corps principal 21 . Dans l’exemple de réalisation considéré sur les figures 2 et 3, la face latérale extérieure du corps principal 21 délimite une gorge périphérique 23 à l’intérieur de laquelle le joint torique 22 est reçu. Les aménagements du corps principal 21 et/ou du joint 22, assurant leur assemblage au sein du tiroir 20 ne sont pas limitatifs du moment que, à l’état assemblé de la cartouche 1 , en particulier lorsque le tiroir 20 est reçu dans la chambre 1 1 , le joint 22 se trouve radialement interposé entre le corps principal 21 et la paroi latérale 16 de la chambre 1 1 : une partie périphérique extérieure 22A du joint 22 est alors prévue pour être compressée, radialement à l’axe X-X, contre la paroi 16 de la chambre 1 1 , de manière à former une étanchéité à l’eau chaude et à l’eau froide entre les passages 14 et 15. Ainsi, à l’intérieur de la chambre 1 1 , la partie périphérique 22A du joint 22 étanche l’un vis-à-vis de l’autre les passages 14 et 15 à l’extérieur du tiroir 20. En pratique, pour que cette étanchéité soit satisfaisante, la compression minimale de la partie périphérique 22A du joint 22 doit être substantielle et résulte d’un différentiel dimensionnel entre la paroi 16 de la chambre 1 1 et le joint 22, à savoir que le diamètre de la paroi 16, noté D16 sur la figure 2, est inférieur au diamètre, noté D22 sur la figure 3, que présente la partie périphérique 22A du joint 22 lorsque le tiroir 20 est hors de la chambre 1 1 . The drawer 20 also includes an O-ring 22 which is carried by the external lateral face of the main body 21. In the embodiment considered in Figures 2 and 3, the outer side face of the main body 21 defines a peripheral groove 23 inside which the O-ring 22 is received. The arrangements of the main body 21 and / or of the seal 22, ensuring their assembly within the drawer 20 are not limiting as long as, in the assembled state of the cartridge 1, in particular when the drawer 20 is received in the chamber 1 1, the seal 22 is radially interposed between the main body 21 and the side wall 16 of the chamber 1 1: an outer peripheral part 22A of the seal 22 is then provided to be compressed, radially to the axis XX, against the wall 16 of chamber 1 1, so as to form a seal against hot water and cold water between passages 14 and 15. Thus, inside chamber 1 1, the peripheral part 22A of the seal 22 impervious to one another the passages 14 and 15 outside the drawer 20. In practice, for this seal to be satisfactory, the minimum compression of the part peripheral 22A of the joint 22 must be substantial and results from a dimensional differential between the wall 16 of the chamber 1 1 and the joint 22, namely that the diameter of the wall 16, denoted D16 in FIG. 2, is less than the diameter , denoted D22 in FIG. 3, presented by the peripheral part 22A of the seal 22 when the drawer 20 is out of the chamber 11.
Pour que l’eau froide admise à l’intérieur de la chambre 1 1 via le passage 15 puisse rejoindre et se mélanger avec l’eau chaude admise dans la chambre via le passage 14, pour former l’eau mitigée s’écoulant en aval du tiroir 20 jusqu’au passage 17, le tiroir 20 présente un passage d’écoulement 24 reliant l’une à l’autre les faces axiales opposées du tiroir. Dans l’exemple de réalisation considéré ici, le passage d’écoulement So that the cold water admitted inside the chamber 1 1 via the passage 15 can join and mix with the hot water admitted into the chamber via the passage 14, to form the mixed water flowing downstream from the drawer 20 to the passage 17, the drawer 20 has a flow passage 24 connecting to each other the opposite axial faces of the drawer. In the embodiment considered here, the flow passage
24 est délimité par le corps principal 21 , en étant constitué de plusieurs orifices traversants, répartis autour de l’axe X-X. 24 is delimited by the main body 21, consisting of several through holes, distributed around the axis X-X.
Le tiroir 20 comporte également deux joints toriques 25, qui sont distincts du joint 22 et qui sont portés par la face latérale extérieure du corps principal 21. Dans l’exemple de réalisation considéré sur les figures, la face latérale extérieure du corps principal 21 délimite deux gorges périphériques 26, qui sont situées axialement de part et d’autre de la gorge 23 et qui reçoivent respectivement les joints 25. La forme de réalisation de l’assemblage entre chacun des joints 25 et le corps principal 21 n’est pas limitative du moment que chacun des joints 25 forme un aménagement périphérique du tiroir 20 et que ces joints 25 soient situés axialement de part et d’autre du joint 22. De plus, chaque joint The drawer 20 also includes two O-rings 25, which are distinct from the seal 22 and which are carried by the external lateral face of the main body 21. In the embodiment considered in the figures, the external lateral face of the main body 21 delimits two peripheral grooves 26, which are located axially on either side of the groove 23 and which respectively receive the seals 25. The embodiment of the assembly between each of the seals 25 and the main body 21 is not limiting as long as each of the seals 25 forms a peripheral arrangement of the drawer 20 and that these seals 25 are located axially on either side of the seal 22. In addition, each seal
25 est prévu pour que, lorsque le tiroir 20 est hors de la chambre 1 1 , le joint 25 présente un diamètre, noté D25 sur la figure 3, qui est à la fois inférieur au diamètre D22 de la partie périphérique 22A du joint 22, comme bien visible sur la figure 3, et sensiblement égal, c’est-à-dire égal à un jeu fonctionnel près, au diamètre D16 de la paroi 16 de la chambre 1 1 : de cette façon, lorsque le tiroir 20 est monté dans la chambre 1 1 , les joints 25 coopèrent par contact ajusté avec la paroi 16 de la chambre, sans être compressés radialement contre cette paroi 16 ou en n’étant appuyés radialement contre cette paroi 16 que de façon marginale comparativement à la forte compression minimale de la partie périphérique 22A du joint 22. 25 is provided so that, when the slide 20 is out of the chamber 11, the seal 25 has a diameter, denoted D25 in FIG. 3, which is both less than the diameter D22 of the peripheral part 22A of the seal 22, as clearly visible in Figure 3, and substantially equal, that is to say equal to a functional clearance, to the diameter D16 of the wall 16 of the chamber 1 1: in this way, when the drawer 20 is mounted in the chamber 1 1, the seals 25 cooperate by adjusted contact with the wall 16 of the chamber, without being compressed radially against this wall 16 or by being pressed radially against this wall 16 only marginally compared to the strong minimum compression of the peripheral part 22A of the seal 22.
Dès lors qu’un lubrifiant est appliqué sur le joint 22 avant que le tiroir 20 ne soit assemblé à l’enveloppe 10, les joints 25 permettent, lors de l’assemblage du tiroir au reste de la cartouche 1 puis lors du fonctionnement de cette cartouche, de retenir, entre chacun de ces joints 25 et la partie périphérique 22A du joint 22, une réserve de lubrifiant, qui est notée R sur les figures 2 et 3 et qui court sur toute la périphérie extérieure du tiroir 20. En effet, le lubrifiant contenu dans chacune de ces deux réserves R est piégé sur la partie périphérique 22A du joint 22 par le joint correspondant 25, ce dernier évitant à la fois que le lubrifiant contenu dans chaque réserve R ne soit enlevé par balayage contre la paroi 16 de la chambre 1 1 lors de l’introduction du tiroir 20 dans cette chambre à l’assemblage de la cartouche 1 , et que le lubrifiant de chaque réserve R ne soit entraîné par l’eau contenue dans la chambre 1 1 lors des déplacements du tiroir 20 dans la chambre pour réguler la température de l’eau mitigée. As soon as a lubricant is applied to the seal 22 before the drawer 20 is assembled to the casing 10, the seals 25 allow, during the assembly of the drawer to the rest of the cartridge 1 then during the operation of this cartridge, to retain, between each of these seals 25 and the peripheral part 22A of the seal 22, a reserve of lubricant, which is denoted R in FIGS. 2 and 3 and which runs over the entire outer periphery of the drawer 20. In fact, the lubricant contained in each of these two reserves R is trapped on the peripheral part 22A of the seal 22 by the corresponding seal 25, the latter preventing both the lubricant contained in each reserve R from being swept against the wall 16 of the chamber 1 1 when the drawer 20 is introduced into this chamber when the cartridge 1 is assembled, and that the lubricant of each reserve R is not entrained by the water contained in the chamber 1 1 during the movements of the drawer 20 in the chamber to regulate the temperature of the mixed water.
Sur les figures 4 à 6 est représentée une variante du tiroir 20, référencée 60. Le tiroir 60 est fonctionnellement similaire au tiroir 20, mais s’en distingue par sa structure. Plus précisément, le tiroir 60, qui est représenté seul sur la figure 5, comporte un corps principal 61 , qui est fonctionnellement et, pour l’essentiel, structurellement similaire au corps principal 21 du tiroir 20.  In Figures 4 to 6 is shown a variant of the drawer 20, referenced 60. The drawer 60 is functionally similar to the drawer 20, but is distinguished by its structure. More specifically, the drawer 60, which is shown alone in FIG. 5, comprises a main body 61, which is functionally and, essentially, structurally similar to the main body 21 of the drawer 20.
Le tiroir 60 comporte également un joint de forme 62, qui est représenté seul sur la figure 6 et qui, à la différence des joints distincts 22 et 25 du tiroir 20, intègre en une seule pièce une fonction d’étanchéité, telle qu’assurée par le joint 22 pour le tiroir 20, et une fonction de retenue de lubrifiant, telle qu’assurée par les joints 25 pour le tiroir 20. Plus précisément, le joint de forme 62 est porté par la face latérale extérieure du corps principal 61 , en étant par exemple reçu dans une gorge périphérique rainurée 63 délimitée par cette face latérale extérieure du corps principal 61 , étant entendu que d’autres formes de réalisation sont envisageables pour l’assemblage du joint de forme 62 sur le corps principal 61. Dans tous les cas, le joint de forme 62 inclut au moins trois lèvres périphériques extérieures qui sont distantes les unes des autres suivant l’axe X-X. Dans l’exemple de réalisation considéré sur les figures 4 à 6, le joint de forme 62 inclut ainsi une lèvre 64 et deux lèvres 65 situées axialement de part et d’autre de la lèvre 64. De manière fonctionnellement similaire à la partie périphérique 22A du joint 22, la lèvre 64 est, à l’état assemblé de la cartouche 1 , compressée radialement contre la paroi 16 de la chambre 1 1 , de manière à étancher les passages 14 et 15 l’un vis-à-vis de l’autre à l’extérieur du tiroir 20. Dans le même temps, de manière fonctionnellement similaire aux joints 25, les lèvres 65 coopèrent par contact ajusté avec la paroi 16 de la chambre 1 1 à l’état assemblé de la cartouche 1 , de manière à disposer d’une réserve de lubrifiant R entre la lèvre 64 et chacune des lèvres 65, comme indiqué sur la figure 4. En particulier, le joint de forme 62 est prévu pour que, lorsque le tiroir 60 est hors de la chambre 1 1 , la lèvre 64 présente un diamètre D64 supérieur au diamètre D16 de la paroi 16 de la chambre 1 1 , tandis que chacune des lèvres 65 présente un diamètre D65 qui est à la fois inférieur au diamètre D64 de la lèvre 64 et sensiblement égal au diamètre D16 de la paroi 16.  The drawer 60 also includes a shape-shaped seal 62, which is shown alone in FIG. 6 and which, unlike the separate seals 22 and 25 of the drawer 20, integrates in one piece a sealing function, as provided by the seal 22 for the drawer 20, and a lubricant retaining function, as provided by the seals 25 for the drawer 20. More specifically, the shape seal 62 is carried by the external lateral face of the main body 61, by being for example received in a grooved peripheral groove 63 delimited by this external lateral face of the main body 61, it being understood that other embodiments can be envisaged for the assembly of the shape joint 62 on the main body 61. In all in cases, the shape joint 62 includes at least three outer peripheral lips which are spaced from each other along the axis XX. In the embodiment considered in FIGS. 4 to 6, the shaped joint 62 thus includes a lip 64 and two lips 65 located axially on either side of the lip 64. In a functionally similar manner to the peripheral part 22A of the seal 22, the lip 64 is, in the assembled state of the cartridge 1, compressed radially against the wall 16 of the chamber 1 1, so as to seal the passages 14 and 15 one vis-à-vis the 'other outside the drawer 20. At the same time, functionally similar to the seals 25, the lips 65 cooperate by adjusted contact with the wall 16 of the chamber 1 1 in the assembled state of the cartridge 1, so as to have a reserve of lubricant R between the lip 64 and each of the lips 65, as indicated in FIG. 4. In particular, the shaped joint 62 is provided so that, when the drawer 60 is out of the chamber 1 1, the lip 64 has a diameter D64 greater than the diameter D16 of the wall 16 of the chamber 11, while each of the lips 65 has a diameter D65 which is both less than the diameter D64 of the lip 64 and substantially equal to the diameter D16 of the wall 16.
Sur les figures 7 à 8 est représentée une variante des tiroirs 20 et 60, référencée 80. Le tiroir 80 est fonctionnellement similaire aux tiroirs 20 et 60, mais s’en distingue par sa structure. Plus précisément, le tiroir 80 est obtenu par surmoulage d’un insert 81 par un élastomère formant une couche 82, l’insert 81 étant représenté seul sur la figure 8 tandis que la couche en élastomère 82 est représentée seule sur la figure 9. In Figures 7 to 8 is shown a variant of drawers 20 and 60, referenced 80. The drawer 80 is functionally similar to drawers 20 and 60, but is distinguished by its structure. More specifically, the drawer 80 is obtained by molding an insert 81 by an elastomer forming a layer 82, the insert 81 being represented alone in FIG. 8 while the elastomer layer 82 is represented alone in FIG. 9.
L’insert 81 est fonctionnellement similaire aux corps principaux 21 et 61 des tiroirs 20 et 60, tout en présentant la spécificité structurelle qu’une partie périphérique de cet insert 81 est surmoulée par de l’élastomère formant la couche 82. En pratique, l’insert 81 peut être constitué d’une matière métallique ou d’une matière plastique.  The insert 81 is functionally similar to the main bodies 21 and 61 of the drawers 20 and 60, while having the structural specificity that a peripheral part of this insert 81 is overmolded with elastomer forming the layer 82. In practice, the insert 81 may be made of a metallic material or of a plastic material.
La couche en élastomère 82 est fonctionnellement similaire au joint de forme 62 dans le sens où elle intègre en une seule pièce au moins trois lèvres périphériques extérieures, similaires aux lèvres du joint de forme 62. Ainsi, dans l’exemple de réalisation considéré sur les figures 7 à 9, la couche en élastomère 82 forme une lèvre 84, qui, à l’instar de la lèvre 64, assure la fonction d’étanchéité précitée, et deux lèvres 85, qui sont situées axialement de part et d’autre et à distance de la lèvre 84 et qui, à l’instar des lèvres 65, assurent la fonction précitée de retenue de lubrifiant. En particulier, la couche en élastomère 82 est prévue pour que, lorsque le tiroir 80 est hors de la chambre 1 1 , la lèvre 84 présente un diamètre D84 qui est supérieur au diamètre D16 de la paroi 16 de la chambre, et chacune des lèvres 85 présente un diamètre D85 qui est à la fois inférieur au diamètre D84 de la lèvre 84 et sensiblement égal au diamètre D16 de la paroi 16. Ainsi, comme indiqué schématiquement sur la figure 7, une réserve de lubrifiant R peut être retenue entre la lèvre 84 et chacune des lèvres 85.  The elastomer layer 82 is functionally similar to the shape seal 62 in the sense that it integrates in one piece at least three outer peripheral lips, similar to the lips of the shape seal 62. Thus, in the embodiment considered on the FIGS. 7 to 9, the elastomer layer 82 forms a lip 84, which, like lip 64, provides the above-mentioned sealing function, and two lips 85, which are located axially on either side and at a distance from the lip 84 and which, like the lips 65, perform the aforementioned function of retaining lubricant. In particular, the elastomer layer 82 is provided so that, when the drawer 80 is outside of the chamber 11, the lip 84 has a diameter D84 which is greater than the diameter D16 of the wall 16 of the chamber, and each of the lips 85 has a diameter D85 which is both less than the diameter D84 of the lip 84 and substantially equal to the diameter D16 of the wall 16. Thus, as shown diagrammatically in FIG. 7, a reserve of lubricant R can be retained between the lip 84 and each of the lips 85.
Comparativement au tiroir 60 résultant de l’assemblage du corps principal 61 et du joint de forme 62, la réalisation du tiroir 80 par surmoulage limite à la fois la tolérance sur la compression de la lèvre 84 contre la paroi 16 de la chambre 1 1 pour assurer la fonction d’étanchéité, et la tolérance sur l’ajustement du contact entre les lèvres 85 et la paroi 16 de la chambre 1 1 pour assurer la fonction de retenue de lubrifiant.  Compared to the drawer 60 resulting from the assembly of the main body 61 and the shaped joint 62, the production of the drawer 80 by overmolding limits both the tolerance on the compression of the lip 84 against the wall 16 of the chamber 1 1 for ensure the sealing function, and the tolerance on the adjustment of the contact between the lips 85 and the wall 16 of the chamber 1 1 to ensure the lubricant retaining function.
Avantageusement, comme envisagé dans l’exemple de réalisation considéré sur les figures 7 à 9, l’insert 81 délimite des passages traversants 83 qui, lors du surmoulage de l’insert 81 , sont comblés par l’élastomère de la couche 82, permettant ainsi un accrochage mécanique renforcé de la couche en élastomère 82 sur l’insert 81. Bien entendu, les spécificités de dimension et d’agencement pour ces passages traversants 83 ne sont pas limitatives, les passages traversants 83 montrés sur les figures 7 et 8 n’étant qu’un exemple parmi de multiples possibilités.  Advantageously, as envisaged in the embodiment considered in FIGS. 7 to 9, the insert 81 delimits through passages 83 which, during the overmolding of the insert 81, are filled with the elastomer of the layer 82, allowing thus a reinforced mechanical attachment of the elastomer layer 82 on the insert 81. Of course, the specific dimensions and arrangement for these through passages 83 are not limiting, the through passages 83 shown in Figures 7 and 8 n 'being just one example among many possibilities.
Egalement suivant un aménagement optionnel avantageux, qui peut être mis en oeuvre en remplacement ou en complément de la présence des passages traversants 83, l’insert 81 peut être surmoulé par l’élastomère de la couche 82, avec interposition d’un liant chimique d’accrochage, tel qu’une colle, un réactif polymérique, etc. En tenant compte des explications données jusqu’ici, on comprend que le joint torique 22, le joint de forme 62 et la couche en élastomère 82 illustrent les diverses formes que peut prendre une pièce d’étanchéité, dont est pourvu le tiroir 20, 60 ou 80 et dont une partie périphérique, telle que la partie périphérique 22A du joint 22 ou la lèvre 64 du joint de forme 62 ou encore la lèvre 84 de la couche en élastomère 82, est compressée, radialement à l’axe X-X, contre la paroi 16 de la chambre 1 1 de manière à former une étanchéité à l’eau chaude et à l’eau froide entre les passages d’arrivée 14 et 15 à l’état assemblé de la cartouche 1. On comprend également que les aménagements périphériques du tiroir, qui permettent de disposer des réserves de lubrifiant R, peuvent aussi bien être distincts d’une telle pièce d’étanchéité, comme c’est le cas pour les joints 25, qu’être intégrés d’une seule pièce à une telle pièce d’étanchéité, comme c’est le cas pour les lèvres 65 et les lèvres 85. Also according to an advantageous optional arrangement, which can be implemented as a replacement or in addition to the presence of the through passages 83, the insert 81 can be overmolded with the elastomer of the layer 82, with the interposition of a chemical binder d adhesion, such as an adhesive, a polymer reagent, etc. Taking into account the explanations given so far, it is understood that the O-ring 22, the shape seal 62 and the elastomer layer 82 illustrate the various shapes that can take a sealing part, which is provided with the drawer 20, 60 or 80 and of which a peripheral part, such as the peripheral part 22A of the seal 22 or the lip 64 of the shape seal 62 or else the lip 84 of the elastomer layer 82, is compressed, radially to the axis XX, against the wall 16 of chamber 1 1 so as to form a seal against hot water and cold water between the inlet passages 14 and 15 in the assembled state of the cartridge 1. It is also understood that the peripheral arrangements of the drawer, which make it possible to have the reserves of lubricant R, may as well be distinct from such a sealing part, as is the case for the seals 25, as they may be integrated in one piece with such a sealing part, as is the case for the lips 65 and the lips 85.
Enfin, plutôt que l’enveloppe 10, le tiroir 20 et l’élément thermostatique 30, ainsi que le cas échéant le mécanisme 40, soient assemblés les uns aux autres sous forme d’une cartouche à même d’être rapportée d’un seul tenant dans un corps de robinet, telle que la cartouche 1 envisagée jusqu’ici, le tiroir 20 et l’élément thermostatique 30, ainsi que le cas échéant le mécanisme 40, peuvent être installés directement dans un corps de robinet, ce dernier formant alors une enveloppe fonctionnellement similaire à l’enveloppe 10.  Finally, rather than the casing 10, the drawer 20 and the thermostatic element 30, as well as if the mechanism 40, are assembled to each other in the form of a cartridge capable of being brought back in one taking place in a tap body, such as the cartridge 1 envisaged so far, the slide 20 and the thermostatic element 30, as well as if the mechanism 40, can be installed directly in a tap body, the latter then forming an envelope functionally similar to envelope 10.

Claims

REVENDICATIONS
1. Ensemble thermostatique, comportant : 1. Thermostatic assembly, comprising:
- une enveloppe (10) dans laquelle sont délimités :  - an envelope (10) in which are delimited:
- une chambre (1 1 ) qui définit un axe (X-X) et dans laquelle un fluide chaud et un fluide froid se mélangent pour former un fluide mitigé,  - A chamber (1 1) which defines an axis (X-X) and in which a hot fluid and a cold fluid mix to form a mixed fluid,
- un passage d’arrivée de fluide chaud (14) par lequel le fluide chaud pénètre dans la chambre (1 1 ) depuis l’extérieur de l’enveloppe (1 ),  - a hot fluid inlet passage (14) by which the hot fluid enters the chamber (1 1) from outside the envelope (1),
- un passage d’arrivée de fluide froid (15) par lequel le fluide froid pénètre dans la chambre (1 1 ) depuis l’extérieur de l’enveloppe (1 ), et  - a cold fluid inlet passage (15) by which the cold fluid enters the chamber (1 1) from outside the envelope (1), and
- un passage d’évacuation de fluide mitigé (17) par lequel le fluide mitigé contenu dans la chambre (1 1 ) sort de l’enveloppe (1 ),  - a mixed fluid evacuation passage (17) by which the mixed fluid contained in the chamber (1 1) leaves the envelope (1),
- un élément thermostatique (30) qui inclut un corps thermosensible (31 ), agencé pour être en contact avec le fluide mitigé, et un piston (32), relié à l’enveloppe (1 ), le corps thermosensible et le piston se déplaçant l’un par rapport à l’autre suivant l’axe (X-X) en fonction de la température du fluide mitigé, et  - a thermostatic element (30) which includes a thermosensitive body (31), arranged to be in contact with the mixed fluid, and a piston (32), connected to the casing (1), the thermosensitive body and the moving piston one with respect to the other along the axis (XX) as a function of the temperature of the mixed fluid, and
- un tiroir (20 ; 60 ; 80) de régulation de la température du fluide mitigé, lequel tiroir (20 ; 60 ; 80) est relié au corps thermosensible (31 ) de l’élément thermostatique (30) pour être déplacé suivant l’axe (X-X) à l’intérieur de la chambre (1 1 ) de façon à obturer, en des proportions respectives inverses, le passage d’arrivée de fluide chaud (14) et le passage d’arrivée de fluide froid (15), et lequel tiroir (20 ; 60 ; 80) est pourvu d’une pièce d’étanchéité (22 ; 62 ; 82) incluant une partie périphérique (22A ; 64 ; 84) qui est compressée, radialement à l’axe (X-X), contre une paroi (16) de la chambre (1 1 ) interposée axialement entre le passage d’arrivée de fluide chaud (14) et le passage d’arrivée de fluide froid (15), de manière à former une étanchéité au fluide chaud et au fluide froid entre le passage d’arrivée de fluide chaud et le passage d’arrivée de fluide froid,  - A drawer (20; 60; 80) for regulating the temperature of the mixed fluid, which drawer (20; 60; 80) is connected to the thermosensitive body (31) of the thermostatic element (30) to be moved along axis (XX) inside the chamber (1 1) so as to close, in respective inverse proportions, the inlet passage for hot fluid (14) and the inlet passage for cold fluid (15), and which drawer (20; 60; 80) is provided with a sealing part (22; 62; 82) including a peripheral part (22A; 64; 84) which is compressed, radially to the axis (XX), against a wall (16) of the chamber (1 1) interposed axially between the hot fluid inlet passage (14) and the cold fluid inlet passage (15), so as to form a seal against the hot fluid and cold fluid between the hot fluid inlet passage and the cold fluid inlet passage,
caractérisé en ce que le tiroir (20 ; 60 ; 80) est également pourvu de deux aménagements périphériques (25 ; 65 ; 85) pour piéger un lubrifiant sur la partie périphérique (22A ; 64 ; 84) de la pièce d’étanchéité (22 ; 62 ; 82), ces aménagements périphériques (25 ; 65 ; 85) étant situés axialement de part et d’autre de la partie périphérique (22A ; 64 ; 84) de la pièce d’étanchéité (22 ; 62 ; 82) et étant adaptés pour coopérer par contact ajusté avec la paroi (16) de la chambre (1 1 ) de manière à disposer d’une réserve de lubrifiant (R) entre la partie périphérique de la pièce d’étanchéité et chaque aménagement périphérique. characterized in that the drawer (20; 60; 80) is also provided with two peripheral arrangements (25; 65; 85) for trapping a lubricant on the peripheral part (22A; 64; 84) of the sealing part (22 ; 62; 82), these peripheral arrangements (25; 65; 85) being located axially on either side of the peripheral part (22A; 64; 84) of the sealing part (22; 62; 82) and being adapted to cooperate by adjusted contact with the wall (16) of the chamber (1 1) so as to have a reserve of lubricant (R) between the peripheral part of the sealing part and each peripheral arrangement.
2. Ensemble thermostatique suivant la revendication 1 , caractérisé en ce que le tiroir (20 ; 60 ; 80) est conçu pour que, lorsque le tiroir est hors de la chambre (1 1 ), notamment avant montage dans cette chambre, la partie périphérique (22A ; 64 ; 84) de la pièce d’étanchéité (22 ; 62 ; 82) présente un diamètre (D22 ; D64 ; D84) qui est supérieur au diamètre (D16) de la paroi (16) de la chambre (1 1 ) et chacun des aménagements périphériques (25 ; 65 ; 85) du tiroir présente un diamètre (D25 ; D65 ; D85) qui est à la fois inférieur au diamètre (D22 ; D64 ; D84) de la partie périphérique de la pièce d’étanchéité et sensiblement égal au diamètre (D16) de la paroi de la chambre. 2. Thermostatic assembly according to claim 1, characterized in that the drawer (20; 60; 80) is designed so that, when the drawer is out of the chamber (1 1), in particular before mounting in this chamber, the peripheral part (22A; 64; 84) of the sealing part (22; 62; 82) has a diameter (D22; D64; D84) which is greater than the diameter (D16) of the wall (16) of the chamber (1 1 ) and each of the peripheral arrangements (25; 65; 85) of the drawer has a diameter (D25; D65; D85) which is both less than the diameter (D22; D64; D84) of the peripheral part of the sealing part and substantially equal to the diameter (D16) of the wall of the chamber.
3. Ensemble thermostatique suivant l’une des revendications 1 ou 2, caractérisé en ce que les aménagements périphériques (25) du tiroir (20) sont distincts de la pièce d’étanchéité (22).  3. Thermostatic assembly according to one of claims 1 or 2, characterized in that the peripheral arrangements (25) of the drawer (20) are separate from the sealing part (22).
4. Ensemble thermostatique suivant la revendication 3, caractérisé en ce que la pièce d’étanchéité est un joint torique (22), qui est porté par le tiroir (20), et chacun des deux aménagements périphériques est un joint torique (25), qui est porté par le tiroir.  4. Thermostatic assembly according to claim 3, characterized in that the sealing part is an O-ring (22), which is carried by the slide (20), and each of the two peripheral arrangements is an O-ring (25), which is carried by the drawer.
5. Ensemble thermostatique suivant l’une des revendications 1 ou 2, caractérisé en ce que les aménagements périphériques (65 ; 85) du tiroir (60 ; 80) sont intégrés d’une seule pièce à la pièce d’étanchéité (62 ; 82).  5. Thermostatic assembly according to one of claims 1 or 2, characterized in that the peripheral arrangements (65; 85) of the drawer (60; 80) are integrated in one piece with the sealing part (62; 82 ).
6. Ensemble thermostatique suivant la revendication 5, caractérisé en ce que la pièce d’étanchéité est un joint de forme (62), qui est porté par le tiroir (60) et qui inclut au moins trois lèvres, dont une lèvre (64), qui constitue la partie périphérique de la pièce d’étanchéité, et deux autres lèvres (65) qui constituent respectivement les aménagements périphériques du tiroir (60).  6. Thermostatic assembly according to claim 5, characterized in that the sealing part is a shaped joint (62), which is carried by the drawer (60) and which includes at least three lips, including one lip (64) , which constitutes the peripheral part of the sealing part, and two other lips (65) which respectively constitute the peripheral arrangements of the drawer (60).
7. Ensemble thermostatique suivant la revendication 5, caractérisé en ce que le tiroir (80) inclut un insert (81 ) qui est surmoulé par un élastomère, qui constitue la pièce d’étanchéité (82) et qui forme au moins trois lèvres, dont une lèvre (84), qui constitue la partie périphérique de la pièce d’étanchéité, et deux autres lèvres (85) qui constituent respectivement les aménagements périphériques du tiroir.  7. Thermostatic assembly according to claim 5, characterized in that the drawer (80) includes an insert (81) which is molded by an elastomer, which constitutes the sealing part (82) and which forms at least three lips, of which a lip (84), which constitutes the peripheral part of the sealing part, and two other lips (85) which respectively constitute the peripheral arrangements of the drawer.
8. Ensemble thermostatique suivant la revendication 7, caractérisé en ce que l’insert (81 ) du tiroir (80) délimite des passages traversants (83) d’accrochage de la pièce d’étanchéité, qui sont adaptés pour, lors du surmoulage de l’insert, être comblés par l’élastomère de la pièce d’étanchéité. 8. Thermostatic assembly according to claim 7, characterized in that the insert (81) of the drawer (80) delimits through passages (83) for attaching the sealing part, which are adapted for, during overmolding of the insert, be filled with the elastomer of the sealing part.
9. Ensemble thermostatique suivant l’une des revendications 7 ou 8, caractérisé en ce que l’insert (81 ) du tiroir (80) est surmoulé par l’élastomère de la pièce d’étanchéité (82), avec interposition d’un liant chimique d’accrochage. 9. Thermostatic assembly according to one of claims 7 or 8, characterized in that the insert (81) of the drawer (80) is molded by the elastomer of the sealing part (82), with the interposition of a chemical bonding agent.
10. Ensemble thermostatique suivant l’une quelconque des revendications précédentes, caractérisé en ce que l’ensemble thermostatique forme une cartouche thermostatique (1 ) adaptée pour être rapportée d’un seul tenant dans un corps de robinet.  10. Thermostatic assembly according to any one of the preceding claims, characterized in that the thermostatic assembly forms a thermostatic cartridge (1) adapted to be attached in one piece in a valve body.
PCT/EP2019/082162 2018-11-22 2019-11-21 Thermostatic assembly, in particular a thermostatic cartridge WO2020104629A1 (en)

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FR1871699A FR3089025B1 (en) 2018-11-22 2018-11-22 Thermostatic assembly, including thermostatic cartridge
FR1871699 2018-11-22

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4651770A (en) * 1986-03-28 1987-03-24 Speakman Company Ceramic disc faucet valve
FR2774740A1 (en) 1998-02-11 1999-08-13 Vernet Sa SAFETY CARTRIDGE FOR THERMOSTATIC MIXER
EP1321700A2 (en) * 2001-12-19 2003-06-25 Honeywell Ag Valve for fluids
FR2869087A1 (en) 2004-04-15 2005-10-21 Vernet Sa Sa THERMOSTATIC CARTRIDGE FOR CONTROLLING HOT AND COLD FLUIDS AND MIXER FAUCET WITH SUCH A CARTRIDGE
FR2870611A1 (en) 2004-05-18 2005-11-25 Vernet Sa Sa THERMOSTATIC CARTRIDGE FOR CONTROLLING HOT AND COLD FLUIDS AND MIXER FAUCET WITH SUCH A CARTRIDGE
FR2921709A1 (en) 2007-09-27 2009-04-03 Vernet Sa THERMOSTATIC MIXER AND METHOD FOR MANUFACTURING SUCH A MIXER.
WO2013083703A1 (en) 2011-12-07 2013-06-13 Vernet Thermostatic cartridge for the regulation of hot and cold fluids to be mixed

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4651770A (en) * 1986-03-28 1987-03-24 Speakman Company Ceramic disc faucet valve
FR2774740A1 (en) 1998-02-11 1999-08-13 Vernet Sa SAFETY CARTRIDGE FOR THERMOSTATIC MIXER
EP1321700A2 (en) * 2001-12-19 2003-06-25 Honeywell Ag Valve for fluids
FR2869087A1 (en) 2004-04-15 2005-10-21 Vernet Sa Sa THERMOSTATIC CARTRIDGE FOR CONTROLLING HOT AND COLD FLUIDS AND MIXER FAUCET WITH SUCH A CARTRIDGE
FR2870611A1 (en) 2004-05-18 2005-11-25 Vernet Sa Sa THERMOSTATIC CARTRIDGE FOR CONTROLLING HOT AND COLD FLUIDS AND MIXER FAUCET WITH SUCH A CARTRIDGE
FR2921709A1 (en) 2007-09-27 2009-04-03 Vernet Sa THERMOSTATIC MIXER AND METHOD FOR MANUFACTURING SUCH A MIXER.
WO2013083703A1 (en) 2011-12-07 2013-06-13 Vernet Thermostatic cartridge for the regulation of hot and cold fluids to be mixed

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Publication number Publication date
FR3089025A1 (en) 2020-05-29
FR3089025B1 (en) 2020-12-11

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