WO2011117518A1 - A thermostatic valve for a fluid flow circuit and method of manufacturing such a valve - Google Patents

A thermostatic valve for a fluid flow circuit and method of manufacturing such a valve Download PDF

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Publication number
WO2011117518A1
WO2011117518A1 PCT/FR2011/050567 FR2011050567W WO2011117518A1 WO 2011117518 A1 WO2011117518 A1 WO 2011117518A1 FR 2011050567 W FR2011050567 W FR 2011050567W WO 2011117518 A1 WO2011117518 A1 WO 2011117518A1
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WO
WIPO (PCT)
Prior art keywords
arm
spring
valve body
axis
valve
Prior art date
Application number
PCT/FR2011/050567
Other languages
French (fr)
Inventor
Nicolas Pottie
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
Priority to CN201180023070.3A priority Critical patent/CN102884294B/en
Priority to CA2806467A priority patent/CA2806467C/en
Publication of WO2011117518A1 publication Critical patent/WO2011117518A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • 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
    • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
    • G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
    • G05D23/022—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed within a regulating fluid flow

Definitions

  • the present invention relates to a thermostatic valve for a fluid circulation circuit, in particular a cooling fluid for a heat engine, and a method of manufacturing such a valve.
  • the invention is more particularly concerned with valves combining, on the one hand, a thermostatic element which controls the sealing of a flow of a fluid through the valve and which is associated with a return spring and, on the other hand, a body inside which are arranged this thermostatic element and this spring.
  • the valve body must respond to opposite constraints: on one side, its structure must be sufficiently rigid to accept the pressure of the regulated fluid and the mechanical stresses related to the work of its return spring, while on the other hand this structure must be sufficiently perforated so that the fluid can pass through the valve, with a satisfactory flow rate.
  • the body of this type of valve is often molded from a plastic material.
  • An example of this type of valve is provided by JP-A-2006 329272, on which is based the preamble of claim 1.
  • the use of plastic material involves design constraints related to the moderate mechanical strength of the material plastic, especially creep. Taking these constraints into account generally forces the valve body to be dimensioned with large wall thicknesses, limiting the maximum permissible flow through the valve.
  • FR-A-2716519 proposed to associate with the return spring a metal bridge which is pressed by the spring against the free ends of two arms which belong to the valve body and whose opposite ends have molded with the rest of the valve body rigidly.
  • the spring is introduced between the arms, being noted that their relative spacing is greater than the transverse spring dimension.
  • the bridge is raised between the arms, so as to compress the spring before being driven in rotation on itself to engage with the free ends of these arms.
  • FR-A-2 896 319 proposes a valve body made in the form of a one-piece metal part, comprising arms connected to the remainder of the valve body in a deformable manner, being noted that the stresses resulting from the deformations applied to the arms can be important without the risk of damaging the room, given its metallic nature.
  • the object of the present invention is to propose a thermostatic valve with a plastic body, which effectively withstands the decompression force of the return spring of its thermostatic element, at least until the valve is integrated in a control circuit.
  • fluid circulation which allows a substantial regulated fluid flow, while being easy to manufacture and assemble with the other components of the valve.
  • the subject of the invention is a thermostatic valve for a fluid circulation circuit, as defined in claim 1.
  • the invention also relates to a method of manufacturing a thermostatic valve, as defined in claim 10.
  • valve body of a plastic material, especially a thermoplastic material, without providing a significant wall thickness for the arms support of the return spring of its thermostatic element.
  • these support arms are sized not to be rigidly molded with the rest of the valve body, but, on the contrary, to be connected to the remainder of the valve body deformably, which facilitates the manufacture of the valve, allowing a quick and easy assembly of the other components of this valve, in particular the return spring.
  • the arms of the valve body occupy an intermediate position between two extreme positions of deformation, namely a remote extreme position, allowing the introduction of the spring between these arms, and an extreme close position, in which one end of the spring can bear directly against the free ends of the arms, under the decompression effect of this spring.
  • the arms at rest, that is to say when the arms are not subjected to any external stress, coming from both the return spring and a handling tool, the arms have only to undergo a stress of limited deformation to, in one sense, reach their extreme position and then, in the other direction, reach their extreme close position.
  • the dimensioning of the arms relative to the rest of the valve body can be optimized, while limiting the risks that, with respect to the application of the deformation stresses necessary for the assembly of the valve, the deformable connection between these arms and the rest of the valve body is damaged.
  • valve according to the invention is advantageously integrated in a fluid circulation circuit so that, when assembling its body to a dedicated support, this the last releases the arms from the decompression constraints of the spring, by cashing them.
  • the arms of the valve according to the invention have to withstand only during the assembly of this valve and its transport to the place of its integration with such a fluid circulation circuit.
  • thermostatic valve according to the invention taken individually or in any technically possible combination, are specified in the dependent claims 2 to 9.
  • FIG. 1 is a longitudinal section of a valve according to the invention.
  • FIG. 2 is a perspective view of the body, considered alone, of the valve of FIG. 1, before assembly of the other components of the valve;
  • FIG. 3 is a section along the line III-III of Figure 1, the valve body considered alone;
  • FIGS. 4 and 5 are respectively sections along the lines IV-IV and V-V of FIG. 3;
  • FIG. 6 to 8 are elevational views of the valve of Figure 1, illustrating three successive stages of its assembly.
  • FIG. 1 shows a valve 1 intended to regulate the flow of a fluid, for example a cooling fluid, circulating in a circulation circuit, in particular a cooling circuit of a heat engine.
  • a fluid for example a cooling fluid, circulating in a circulation circuit, in particular a cooling circuit of a heat engine.
  • this valve 1 is intended to be put in place in a housing 2 belonging to the aforementioned circuit.
  • this housing 2 may have various embodiments and is shown only partially and schematically in Figure 1.
  • this housing 2 corresponds to the inlet or outlet pipe of an exchanger belonging to the aforementioned cooling circuit.
  • fluid is intended to flow through the valve 1, inside the housing 2, being regulated by the valve.
  • top and lower denote an upward direction in FIGS. 1 to 3 and 6 to 8, which, in the example considered here, corresponds to in the flow direction of the fluid to through the valve, while the terms “low” and “lower” denote a direction in the opposite direction.
  • top and lower denote an upward direction in FIGS. 1 to 3 and 6 to 8, which, in the example considered here, corresponds to in the flow direction of the fluid to through the valve
  • low and lower denote a direction in the opposite direction.
  • the valve 1 extends in length in a vertical direction in Figures 1, 3 and 6 to 8, about a central axis X-X. It comprises four distinct components, assembled to one another as described below, namely an outer body 10 shown alone in FIGS. 2 to 6, a thermostatic element 20, a shutter 30 and a spring 40.
  • the valve body 10 is integrally formed of a plastic material, especially a thermoplastic material, extending along and about the X-X axis.
  • the other components 20, 30 and 40 are arranged inside this valve body.
  • the thermostatic element 20 comprises an upper cup 21 centered on the X-X axis and containing a heat-expandable material such as a wax. This cup is thermally stressed, for example by a fluid in which it bathes permanently.
  • the thermostatic element 20 also comprises a lower piston 22, centered on the axis X-X and movable relative to the cup 21 in a translational movement along the axis X-X. This piston 22 is displaceable under the effect of the expansion of the heat-dissolving material contained in the cup 21, the piston being deployed outside the cup when the material is heated.
  • the cup 21 is provided to be axially immobilized with respect to the valve body 10.
  • the valve body 10 comprises a tubular portion 1 1 which is centered on the axis XX and which internally receives in a substantially adjusted manner the cup 21 so that a flange 23 radially projecting from the cup 21 is supported axially against an inner rim 12 of the part 1 1.
  • the shutter 30 has a rod 31 centered on the axis XX. At its upper end, this rod 31 delimits an axial bearing surface 31A for the free end of the piston 22, this bearing surface 31A being defined here in the bottom of a cavity 32 inside which is received in a fitted manner the lower part of the cup 21. At its lower end, the rod 31 is provided with a peripheral flange 32 extending radially outwardly from this end of the rod. This flange 32 forms, as it were, a valve for closing the circulation of the fluid through the valve body 10. For this purpose, the flange 32 is adapted to bear tightly against an associated seat 13A formed in FIG.
  • a heating of the cup 31 causes the translation, downwards and along the axis XX, of the piston 22 and, by pressing against the surface 31 A, of the shutter 30 which is thus controlled in displacement by the thermostatic element 20: the flange 32 then deviates from the seat 13A to allow the fluid to flow through the valve 1, circulating inside the part 13 of the valve body 10 and then escaping outside of the valve body, by free passages 14A peripherally delimited between tabs 14 belonging to the valve body 10, which extend in length in the direction of the valve body.
  • the tubular portion 13 On its lower side, the tubular portion 13 is integral with two arms 15 belonging to the valve body 10, which extend generally in length in the direction of the axis XX, being diametrically opposed to each other. other relative to this axis, as visible in Figures 1 and 2.
  • each arm 15 is in the form of a hook whose recess is directed upwards. This recess is adapted to receive the lower end turn 41 of the spring 40, the hook shape providing a transverse wedge for this turn 41.
  • the spring 40 is interposed in a compressed state. between the ends 15-i of the arms 15 and the shutter 30, being centered on the axis XX and with its upper end turn 42 coaxially surrounding a projecting skirt 33 provided at the lower end of the rod 31: thus, the turn 41 is in pressing contact down against the bottom surface 15A of the recess delimited by the lower end 15i of each arm 15.
  • the spring 40 is provided for recall the piston 22 in the direction of the cup 21 when the heat-shrinkable material contained in this cup contracts after a drop in its temperature.
  • each arm 15 is integrally formed with a constricted portion of the lower end of the tubular portion 13.
  • the end 15 2 of each arm 15 is deformable in the manner of a hinge so that the arm is movable relative to the remainder of the valve body 10 by tilting about a geometric axis 15B extending at the axial level of the end 2 , in a direction orthoradial to the axis XX, as shown in Figures 1 to 3.
  • valve body 10 is previously obtained by molding a plastic material so that, at the outlet of the mold, this valve body has the configuration shown in FIGS. 2 to 6. More specifically, when considering the valve body 10 at the mold outlet, the arms 15 do not extend strictly parallel to the axis XX, but are inclined relative to this axis, away from the axis downwards, as clearly visible in Figure 6. In longitudinal section to the valve body 10, the angle formed between the longitudinal direction of each arm 15 and the axis XX is thus a few degrees, for example about 5 ° . In other words, the maximum radial distance between the lower end 15-i of each arm and the axis XX is greater than the radial distance between the upper end 2 and this axis.
  • protrusions 16 provided at the lower end 15i of each arm 15: these lugs 16, clearly visible in Figures 2 and 3, projecting in a direction substantially parallel to the axis of tilting 15B, since the side edges respectively of the lower end 15-i of the arm 15. These lugs 16 are thus easy to approach and to manipulate using the aforementioned tool, while controlling the amplitude of the tilting movement applied to the arm 15, being noted that the intensity of the deformation stresses applied to the end 2 of the arm is directly dependent on this range of motion .
  • the thermostatic element 20, the shutter 30 and the spring 40 are introduced axially at the same time. inside the valve body 10, from bottom to top in the figures.
  • the introduction of the thermostatic element 20 is carried out until the collar 23 of its cup 21 comes to bear axially against the rim 12 of the part 1 1 of the valve body 10.
  • the shutter 30 is introduced jointly with the thermostatic element. It is possibly the same for the spring 40. In all cases, this spring 40 is introduced gradually between the arms 15, as shown in FIG. 7, until the spring 40 is compressed upwards, the end turn upper 42 bearing axially against the lower end of the shutter 30.
  • This compression of the spring 40 is continued by driving upwardly of the lower end turn 41, until the latter is axially arranged Above the axial level of the lower ends 15-i of the arms 15.
  • the compression of the spring is advantageously achieved by a tool extending transversely to the axis XX, between the arms 15 along the periphery of the valve body. 10.
  • the arms 15 While maintaining the spring 40 in this compressed state, the arms 15 are then tilted inwards, that is to say in the direction of the axis XX, about their axis 15B, in particular using the aforementioned ad hoc training tool.
  • the lower ends 15i of the arms are thus each approached to the axis XX, until these ends are arranged axially in line with the turn 41 of the spring 40: the radial distance between the axis XX and the surface 15A the lower end 15-i of each arm 15, then denoted d 0 in Figure 8, is smaller than the radial distance d 40 of the spring 40.
  • the arms 15 return by their position of rest, which is to say that, in a first phase of this inward tilting, the upper ends 15 2 of the arms 15 deform in the opposite direction of their deformation to move from Figure 6 to Figure 7, and then in a second phase, continue their deformation in the opposite direction, until the arms reach the extreme close position of Figure 8. It is thus understood that the aforesaid distance d 0 is less than the rest distance d ".
  • these arms extend substantially parallel to the axis XX: in this way, the valve body 10, in particular its lower part including the arms 15, can be easily implanted within the fluid circulation circuit mentioned above, especially inside the housing 2.
  • the assembly of the valve 1 is particularly fast and easy, the various steps of this assembly can be automated in particular, especially along an assembly line.
  • no part, in particular stiffening, is to relate to the valve body 10. Due to the fact that, at the outlet of the mold, each arm 15 occupies an intermediate position between its extreme position apart from Figure 7 and its position 8, the deformation stresses undergone by its upper end 2 to drive the arm between these two extreme positions are limited.
  • the deformation stresses for passing each arm 15 from its rest position to its far end position are advantageously of the same order of magnitude as the deformation stresses to move the arm from its rest position to its close-out position: to do this, the inclination of the arms in their rest position, relative to the axis XX, is substantially half of their inclination when they are in their extreme extended position, which is to say that the angle a is worth about half of the angle ⁇ .
  • the closure seat 13A provided at the lower end of the tubular portion 13 is delimited by a seal 17
  • This seal 17 is made in particular of silicone or a thermoplastic elastomer (TPE).
  • TPE thermoplastic elastomer
  • this seal 17 is overmolded on the tubular portion 13, from outside this part.
  • the wall of the portion 13 is traversed transversely by a channel 13C which connects the seat area 13A and the outer side face of the valve body 10: this channel 13C is powered by the material constituting the joint 17 when this material is the liquid state, in particular by heat treatment, from the outside of the tubular part 13, as indicated by the arrow C in FIG.
  • the external lateral face of the part 13 advantageously delimits a peripheral groove 13D connected, in the thickness of the wall of the part 13, at channel 13C.
  • this material also spreads in the groove 13D and, by using a suitable mold, a seal 18 is then overmolded around the outside of the tubular portion 13, being molded with the seal 17.
  • a plurality of transverse through passages 13E delimited in the thickness of the wall of the portion 13 and distributed substantially regularly around the axis XX, connect to each other the seals 17 and 18 in addition to the passage associated with the feed channel 13C.
  • this seal 18 allows, when the valve 1 is received in the housing 2, to form a sealed contact with the housing.
  • the part 1 1 of the valve body 10 is also provided with seals reported by overmolding. More precisely, as clearly visible in FIGS. 3 and 5, a seal 19 is attached inside the rim 12 of the part 1 1, so as to be radially interposed between the part 1 1 and the cup 21 of the thermostatic element 20.
  • a seal 1 10 runs on the outer lateral face of the part 1 1 for, as shown in Figure 1, forming a sealed contact with the housing 2 when the valve 1 is received therein.
  • the seals 19 and 1 10 are integral with one another via a transverse through passage 11A (FIG. 3) delimited in the thickness of the wall of the part. 1 1.
  • valve 1 Various arrangements and variants of the valve 1 and its manufacturing process are also possible. As examples:
  • More than two support arms 15 of the spring 40 can be integral with the rest of the valve body 10, in particular being distributed uniformly about the axis X-X;
  • valve body 10 The outer geometry of the valve body 10 is not limited to that shown in the figures, in particular for dimensional and / or geometric adaptation to the housing 2 within which the valve 1 is intended to be assembled; and or

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Temperature-Responsive Valves (AREA)
  • Lift Valve (AREA)
  • Valve Housings (AREA)

Abstract

The thermostatic valve (1) comprises a thermostatic element (20) of which the moving part (22) brings about the movement, with respect to the valve body (10), of a shut-off element (30) that regulates the flow of a fluid through this valve body, and a compressed spring (40) designed to return this moving part towards the fixed part (21) of the thermostatic element and the relaxation force of which is borne by at least two arms (15) of the valve body, a first longitudinal end (152) of which is moulded as one with the remainder of this valve body. To make it easier to manufacture the valve body and to assemble it with the other components of the valve, each arm, at its second longitudinal end (15-i), delimits a contact surface (15A) for contact with the spring and against which surface one end (41) of this spring presses under of the effect of its relaxation. In addition, at its first end, each arm is connected to the rest of the valve body in a way that is deformable between a first extreme position in which the contact surface is positioned in line with the spring, and a second extreme position in which the contact surface is off-axis, passing through an intermediate position somewhere between these extreme positions, which intermediate position is occupied by the arm at rest and in which the contact surface (15A) of this arm is situated a radial distance (dα) away from the axis (X-X) of the thermostatic element, which distance is less than the corresponding maximum radial dimension (d40) of the spring (40).

Description

VANNE THERMOSTATIQUE POUR UN CIRCUIT DE CIRCULATION DE FLUIDE ET PROCEDE DE FABRICATION D'UNE TELLE VANNE  THERMOSTATIC VALVE FOR A FLUID CIRCUIT CIRCUIT AND METHOD OF MANUFACTURING SUCH VALVE
La présente invention concerne une vanne thermostatique pour un circuit de circulation de fluide, notamment d'un fluide de refroidissement pour un moteur thermique, ainsi qu'un procédé de fabrication d'une telle vanne. The present invention relates to a thermostatic valve for a fluid circulation circuit, in particular a cooling fluid for a heat engine, and a method of manufacturing such a valve.
L'invention s'intéresse plus particulièrement aux vannes combinant, d'une part, un élément thermostatique qui commande l'obturation d'un écoulement d'un fluide à travers la vanne et qui est associé à un ressort de rappel et, d'autre part, un corps à l'intérieur duquel sont agencés cet élément thermostatique et ce ressort. Le corps de vanne doit répondre à des contraintes opposées : d'un côté, sa structure doit être suffisamment rigide pour encaisser la pression du fluide régulé et les efforts mécaniques liés au travail de son ressort de rappel, tandis que, d'un autre côté, cette structure doit être suffisamment ajourée pour que le fluide puisse passer à travers la vanne, avec un débit satisfaisant.  The invention is more particularly concerned with valves combining, on the one hand, a thermostatic element which controls the sealing of a flow of a fluid through the valve and which is associated with a return spring and, on the other hand, a body inside which are arranged this thermostatic element and this spring. The valve body must respond to opposite constraints: on one side, its structure must be sufficiently rigid to accept the pressure of the regulated fluid and the mechanical stresses related to the work of its return spring, while on the other hand this structure must be sufficiently perforated so that the fluid can pass through the valve, with a satisfactory flow rate.
Pour de nombreuses raisons, notamment la facilité et le coût de fabrication, le corps de ce type de vanne est souvent moulé en une matière plastique. Un exemple de ce type de vanne est fourni par JP-A-2006 329272, sur lequel est basé le préambule de la revendication 1. Toutefois, l'utilisation de matière plastique implique des contraintes de conception liées à la tenue mécanique modérée de la matière plastique, notamment au fluage. La prise en compte de ces contraintes oblige généralement à dimensionner le corps de vanne avec des épaisseurs de paroi importantes, limitant le débit maximal admissible à travers la vanne.  For many reasons, including ease and cost of manufacture, the body of this type of valve is often molded from a plastic material. An example of this type of valve is provided by JP-A-2006 329272, on which is based the preamble of claim 1. However, the use of plastic material involves design constraints related to the moderate mechanical strength of the material plastic, especially creep. Taking these constraints into account generally forces the valve body to be dimensioned with large wall thicknesses, limiting the maximum permissible flow through the valve.
Pour contourner en partie cet inconvénient, FR-A-2 716 519 a proposé d'associer au ressort de rappel un pontet métallique qui est pressé par le ressort contre les extrémités libres de deux bras qui appartiennent au corps de vanne et dont les extrémités opposées sont venues de moulage avec le reste du corps de vanne de manière rigide. Pour assembler la vanne, le ressort est introduit entre les bras, étant remarqué que leur écartement relatif est supérieur à la dimension transversale de ressort. Puis, alors que le pontet s'étend en longueur transversalement à la direction selon laquelle les bras sont en regard l'un de l'autre, le pontet est remonté entre les bras, de manière à comprimer le ressort, avant d'être entraîné en rotation sur lui-même pour venir en prise avec les extrémités libres de ces bras. Lorsque cette vanne est installée dans un circuit de circulation de fluide, son corps est assemblé à un support conçu pour reprendre l'effort de décompression du ressort, libérant ainsi les bras qui, à la longue, n'auraient pas résisté. Bien que cette solution soit satisfaisante, elle nécessite de fournir et de mettre en place le pontet, ce qui complique sa conception et sa fabrication. De plus, la présence du pontet créé une résistance à l'écoulement du fluide à travers la vanne. To partially overcome this disadvantage, FR-A-2716519 proposed to associate with the return spring a metal bridge which is pressed by the spring against the free ends of two arms which belong to the valve body and whose opposite ends have molded with the rest of the valve body rigidly. To assemble the valve, the spring is introduced between the arms, being noted that their relative spacing is greater than the transverse spring dimension. Then, while the bridge extends in length transversely to the direction in which the arms are facing each other, the bridge is raised between the arms, so as to compress the spring before being driven in rotation on itself to engage with the free ends of these arms. When this valve is installed in a fluid circulation circuit, its body is assembled to a support designed to resume the decompression force of the spring, thus releasing the arms which, in the long run, would not have resisted. Although this solution is satisfactory, it requires the provision and implementation of the bridge, which complicates its design and manufacture. In addition, the presence of the bridge creates resistance to the flow of fluid through the valve.
De son côté, FR-A-2 896 319 propose un corps de vanne réalisé sous forme d'une pièce métallique monobloc, comprenant des bras liés au reste du corps de vanne de manière déformable, étant remarqué que les contraintes résultant des déformations appliquées aux bras peuvent être importantes sans courir le risque d'endommager la pièce, eu égard à sa nature métallique.  For its part, FR-A-2 896 319 proposes a valve body made in the form of a one-piece metal part, comprising arms connected to the remainder of the valve body in a deformable manner, being noted that the stresses resulting from the deformations applied to the arms can be important without the risk of damaging the room, given its metallic nature.
Le but de la présente invention est de proposer une vanne thermostatique à corps en matière plastique, qui supporte efficacement l'effort de décompression du ressort de rappel de son élément thermostatique, au moins jusqu'à l'intégration de la vanne dans un circuit de circulation de fluide, et qui autorise un débit de fluide régulé substantiel, tout en étant facile à fabriquer et à assembler aux autres composants de la vanne.  The object of the present invention is to propose a thermostatic valve with a plastic body, which effectively withstands the decompression force of the return spring of its thermostatic element, at least until the valve is integrated in a control circuit. fluid circulation, which allows a substantial regulated fluid flow, while being easy to manufacture and assemble with the other components of the valve.
A cet effet, l'invention a pour objet une vanne thermostatique pour un circuit de circulation de fluide, telle que définie à la revendication 1.  For this purpose, the subject of the invention is a thermostatic valve for a fluid circulation circuit, as defined in claim 1.
L'invention a également pour objet un procédé de fabrication d'une vanne thermostatique, tel que défini à la revendication 10.  The invention also relates to a method of manufacturing a thermostatic valve, as defined in claim 10.
L'idée à la base de l'invention est de réaliser l'essentiel, voire la totalité du corps de vanne en une matière plastique, notamment en une matière thermoplastique, sans pour autant prévoir une épaisseur de paroi significative pour ce qui concerne les bras de support du ressort de rappel de son élément thermostatique. Selon l'invention, ces bras de support sont dimensionnés non pas pour être rigidement venus de moulage avec le reste du corps de vanne, mais, au contraire, pour être liés au reste du corps de vanne de manière déformable, ce qui facilite la fabrication de la vanne, en permettant un assemblage rapide et facile des autres composante de cette vanne, en particulier du ressort de rappel. En effet, en sortie de moule, les bras du corps de vanne occupent une position intermédiaire entre deux positions extrêmes de déformation, à savoir une position extrême écartée, permettant l'introduction du ressort entre ces bras, et une position extrême rapprochée, dans laquelle une extrémité du ressort peut s'appuyer directement contre les extrémités libres des bras, sous l'effet de décompression de ce ressort. Autrement dit, au repos, c'est-à-dire lorsque les bras ne sont soumis à aucune contrainte extérieure, provenant tant du ressort de rappel que d'un outillage de manipulation, les bras n'ont qu'à subir une contrainte de déformation limitée pour, dans un sens, atteindre leur position extrême écartée puis, dans l'autre sens, atteindre leur position extrême rapprochée. On comprend ainsi que le dimensionnement des bras par rapport au reste du corps de vanne peut être optimisé, tout en limitant les risques que, eu égard à l'application des contraintes de déformation nécessaires à l'assemblage de la vanne, la liaison déformable entre ces bras et le reste du corps de vanne soit endommagée. The idea underlying the invention is to make most or all of the valve body of a plastic material, especially a thermoplastic material, without providing a significant wall thickness for the arms support of the return spring of its thermostatic element. According to the invention, these support arms are sized not to be rigidly molded with the rest of the valve body, but, on the contrary, to be connected to the remainder of the valve body deformably, which facilitates the manufacture of the valve, allowing a quick and easy assembly of the other components of this valve, in particular the return spring. Indeed, at the outlet of the mold, the arms of the valve body occupy an intermediate position between two extreme positions of deformation, namely a remote extreme position, allowing the introduction of the spring between these arms, and an extreme close position, in which one end of the spring can bear directly against the free ends of the arms, under the decompression effect of this spring. In other words, at rest, that is to say when the arms are not subjected to any external stress, coming from both the return spring and a handling tool, the arms have only to undergo a stress of limited deformation to, in one sense, reach their extreme position and then, in the other direction, reach their extreme close position. It is thus understood that the dimensioning of the arms relative to the rest of the valve body can be optimized, while limiting the risks that, with respect to the application of the deformation stresses necessary for the assembly of the valve, the deformable connection between these arms and the rest of the valve body is damaged.
Bien entendu, suivant des considérations inspirées de FR-A-2 716 519, la vanne selon l'invention est avantageusement intégrée dans un circuit de circulation de fluide de manière que, lors de l'assemblage de son corps à un support dédié, ce dernier libère les bras des contraintes de décompression du ressort, en encaissant ces dernières. Of course, according to considerations inspired by FR-A-2 716 519, the valve according to the invention is advantageously integrated in a fluid circulation circuit so that, when assembling its body to a dedicated support, this the last releases the arms from the decompression constraints of the spring, by cashing them.
Autrement dit, dans ce cas, les bras de la vanne selon l'invention n'ont à résister que lors de l'assemblage de cette vanne et de son transport jusqu'au lieu de son intégration à un tel circuit de circulation de fluide. In other words, in this case, the arms of the valve according to the invention have to withstand only during the assembly of this valve and its transport to the place of its integration with such a fluid circulation circuit.
Des caractéristiques additionnelles avantageuses de la vanne thermostatique conforme à l'invention, prises isolément ou selon toutes les combinaisons techniquement possibles, sont spécifiées aux revendications dépendantes 2 à 9.  Additional advantageous features of the thermostatic valve according to the invention, taken individually or in any technically possible combination, are specified in the dependent claims 2 to 9.
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 with reference to the drawings in which:
- la figure 1 est une coupe longitudinale d'une vanne conforme à l'invention ;  - Figure 1 is a longitudinal section of a valve according to the invention;
- la figure 2 est une vue en perspective du corps, considéré seul, de la vanne de la figure 1 , avant assemblage des autres composants de la vanne ;  FIG. 2 is a perspective view of the body, considered alone, of the valve of FIG. 1, before assembly of the other components of the valve;
- la figure 3 est une coupe selon la ligne lll-lll de la figure 1 , du corps de vanne considéré seul ;  - Figure 3 is a section along the line III-III of Figure 1, the valve body considered alone;
- les figures 4 et 5 sont respectivement des coupes selon les lignes IV-IV et V-V de la figure 3 ; et  FIGS. 4 and 5 are respectively sections along the lines IV-IV and V-V of FIG. 3; and
- les figures 6 à 8 sont des vues en élévation de la vanne de la figure 1 , illustrant trois étapes successives de son assemblage.  - Figures 6 to 8 are elevational views of the valve of Figure 1, illustrating three successive stages of its assembly.
Sur la figure 1 est représentée une vanne 1 destinée à réguler l'écoulement d'un fluide, par exemple d'un fluide de refroidissement, circulant au sein d'un circuit de circulation, notamment un circuit de refroidissement d'un moteur thermique. En service, cette vanne 1 est prévue pour être mise en place dans un boîtier 2 appartenant au circuit précité. En pratique, ce boîtier 2 peut présenter des formes de réalisation diverses et n'est représenté que de manière partielle et schématique sur la figure 1 . A titre d'exemple, ce boîtier 2 correspond au tube d'entrée ou de sortie d'un échangeur appartenant au circuit de refroidissement précité.  FIG. 1 shows a valve 1 intended to regulate the flow of a fluid, for example a cooling fluid, circulating in a circulation circuit, in particular a cooling circuit of a heat engine. In use, this valve 1 is intended to be put in place in a housing 2 belonging to the aforementioned circuit. In practice, this housing 2 may have various embodiments and is shown only partially and schematically in Figure 1. By way of example, this housing 2 corresponds to the inlet or outlet pipe of an exchanger belonging to the aforementioned cooling circuit.
Comme indiqué par les flèches 4, du fluide est destiné à s'écouler à travers la vanne 1 , à l'intérieur du boîtier 2, en étant régulé par la vanne.  As indicated by the arrows 4, fluid is intended to flow through the valve 1, inside the housing 2, being regulated by the valve.
Par commodité, la suite de la description est orientée de sorte que les termes « haut » et « supérieur » désignent une direction dirigée vers le haut sur les figures 1 à 3 et 6 à 8, qui, dans l'exemple considéré ici, correspond au sens d'écoulement du fluide à travers la vanne, tandis que les termes « bas » et « inférieur » désignent une direction de sens opposé. Ainsi, lorsque la vanne 1 l'autorise, le fluide traverse verticalement de bas en haut cette dernière, comme indiqué par les flèches 4. For convenience, the remainder of the description is oriented so that the terms "top" and "upper" denote an upward direction in FIGS. 1 to 3 and 6 to 8, which, in the example considered here, corresponds to in the flow direction of the fluid to through the valve, while the terms "low" and "lower" denote a direction in the opposite direction. Thus, when the valve 1 allows it, the fluid passes vertically upwards from the bottom, as indicated by the arrows 4.
La vanne 1 s'étend en longueur suivant une direction verticale sur les figures 1 , 3 et 6 à 8, autour d'un axe central X-X. Elle comprend quatre composants distincts, assemblés les uns aux autres comme décrit plus loin, à savoir un corps externe 10 représenté seul sur les figures 2 à 6, un élément thermostatique 20, un obturateur 30 et un ressort 40.  The valve 1 extends in length in a vertical direction in Figures 1, 3 and 6 to 8, about a central axis X-X. It comprises four distinct components, assembled to one another as described below, namely an outer body 10 shown alone in FIGS. 2 to 6, a thermostatic element 20, a shutter 30 and a spring 40.
Le corps de vanne 10 est réalisé de façon monobloc en une matière plastique, notamment une matière thermoplastique, en s'étendant le long et autour de l'axe X-X. Les autres composants 20, 30 et 40 sont agencés à l'intérieur de ce corps de vanne.  The valve body 10 is integrally formed of a plastic material, especially a thermoplastic material, extending along and about the X-X axis. The other components 20, 30 and 40 are arranged inside this valve body.
L'élément thermostatique 20 comprend une coupelle supérieure 21 centrée sur l'axe X-X et contenant une matière thermodilatable telle qu'une cire. Cette coupelle est sollicitée thermiquement, par exemple par un fluide dans laquelle elle baigne en permanence. L'élément thermostatique 20 comprend également un piston inférieur 22, centré sur l'axe X-X et déplaçable par rapport à la coupelle 21 suivant un mouvement de translation selon l'axe X-X. Ce piston 22 est déplaçable sous l'effet de la dilatation de la matière thermodilatable contenue dans la coupelle 21 , le piston étant déployé à l'extérieur de la coupelle lorsque cette matière est échauffée.  The thermostatic element 20 comprises an upper cup 21 centered on the X-X axis and containing a heat-expandable material such as a wax. This cup is thermally stressed, for example by a fluid in which it bathes permanently. The thermostatic element 20 also comprises a lower piston 22, centered on the axis X-X and movable relative to the cup 21 in a translational movement along the axis X-X. This piston 22 is displaceable under the effect of the expansion of the heat-dissolving material contained in the cup 21, the piston being deployed outside the cup when the material is heated.
A l'état assemblé de la vanne 1 , la coupelle 21 est prévue pour être axialement immobilisée par rapport au corps de vanne 10. A cet effet, le corps de vanne 10 comporte une partie tubulaire 1 1 qui est centrée sur l'axe X-X et qui intérieurement reçoit de manière sensiblement ajustée la coupelle 21 de sorte qu'une collerette 23 radialement saillante de la coupelle 21 s'appuie axialement contre un rebord interne 12 de la partie 1 1 .  In the assembled state of the valve 1, the cup 21 is provided to be axially immobilized with respect to the valve body 10. For this purpose, the valve body 10 comprises a tubular portion 1 1 which is centered on the axis XX and which internally receives in a substantially adjusted manner the cup 21 so that a flange 23 radially projecting from the cup 21 is supported axially against an inner rim 12 of the part 1 1.
L'obturateur 30 comporte une tige 31 centrée sur l'axe X-X. A son extrémité supérieure, cette tige 31 délimite une surface 31A d'appui axial pour l'extrémité libre du piston 22, cette surface d'appui 31A étant ici délimitée dans le fond d'une cavité 32 à l'intérieur de laquelle est reçu de manière ajustée la partie inférieure de la coupelle 21 . A son extrémité inférieure, la tige 31 est munie d'un rebord périphérique 32 s'étendant radialement en saillie vers l'extérieur de cette extrémité de la tige. Ce rebord 32 forme, en quelque sorte, un clapet de fermeture de la circulation du fluide à travers le corps de vanne 10. A cet effet, le rebord 32 est adapté pour venir s'appuyer de manière étanche contre un siège associé 13A formé à l'extrémité inférieure d'une partie tubulaire 13 du corps de vanne 10, qui est centrée sur l'axe X-X et qui délimite intérieurement une voie 13B d'écoulement du fluide à travers le corps de vanne 10, comme montré sur la figure 3 sur laquelle sont reprises, de manière schématique, les flèches 4 d'écoulement du fluide définies plus haut en regard de la figure 1 . The shutter 30 has a rod 31 centered on the axis XX. At its upper end, this rod 31 delimits an axial bearing surface 31A for the free end of the piston 22, this bearing surface 31A being defined here in the bottom of a cavity 32 inside which is received in a fitted manner the lower part of the cup 21. At its lower end, the rod 31 is provided with a peripheral flange 32 extending radially outwardly from this end of the rod. This flange 32 forms, as it were, a valve for closing the circulation of the fluid through the valve body 10. For this purpose, the flange 32 is adapted to bear tightly against an associated seat 13A formed in FIG. the lower end of a tubular portion 13 of the valve body 10, which is centered on the axis XX and which internally delimits a flow path 13B of the fluid through the valve body 10, as shown in Figure 3 on which are shown schematically the arrows 4 of fluid flow defined above with respect to Figure 1.
A l'état assemblé de la vanne 1 et lorsque cette dernière est en service, un échauffement de la coupelle 31 provoque la translation, vers le bas et suivant l'axe X-X, du piston 22 et, par appui contre la surface 31 A, de l'obturateur 30 qui est ainsi commandé en déplacement par l'élément thermostatique 20 : le rebord 32 s'écarte alors du siège 13A pour laisser le fluide s'écouler à travers la vanne 1 , en circulant à l'intérieur de la partie 13 du corps de vanne 10 puis en s'échappant à l'extérieur de ce corps de vanne, par des passages libres 14A délimités périphériquement entre des pattes 14 appartenant au corps de vanne 10, qui s'étendent en longueur suivant la direction de l'axe X-X et qui relient rigidement l'une à l'autre les parties tubulaires 1 1 et 13, comme bien visible sur les figures 2 et 3.  In the assembled state of the valve 1 and when the latter is in use, a heating of the cup 31 causes the translation, downwards and along the axis XX, of the piston 22 and, by pressing against the surface 31 A, of the shutter 30 which is thus controlled in displacement by the thermostatic element 20: the flange 32 then deviates from the seat 13A to allow the fluid to flow through the valve 1, circulating inside the part 13 of the valve body 10 and then escaping outside of the valve body, by free passages 14A peripherally delimited between tabs 14 belonging to the valve body 10, which extend in length in the direction of the valve body. XX axis and which rigidly connect to each other the tubular portions 1 1 and 13, as clearly visible in Figures 2 and 3.
Sur son côté inférieur, la partie tubulaire 13 est venue de matière avec deux bras 15 appartenant au corps de vanne 10, qui s'étendent globalement en longueur suivant la direction de l'axe X-X, en étant diamétralement opposés l'un à l'autre par rapport à cet axe, comme visible sur les figures 1 et 2.  On its lower side, the tubular portion 13 is integral with two arms 15 belonging to the valve body 10, which extend generally in length in the direction of the axis XX, being diametrically opposed to each other. other relative to this axis, as visible in Figures 1 and 2.
L'extrémité inférieure 15-i de chaque bras 15 se présente sous la forme d'un crochet dont l'évidement est dirigé vers le haut. Cet évidement est adapté pour recevoir la spire d'extrémité inférieure 41 du ressort 40, la forme en crochet assurant un calage transversal pour cette spire 41. A l'état assemblé de la vanne 1 , le ressort 40 est interposé, dans un état comprimé, entre les extrémités 15-i des bras 15 et l'obturateur 30, en étant centré sur l'axe X-X et avec sa spire d'extrémité supérieure 42 entourant co- axialement une jupe saillante 33 prévue à l'extrémité inférieure de la tige 31 : ainsi, la spire 41 est en contact pressant vers le bas contre la surface de fond 15A de l'évidement délimité par l'extrémité inférieure 15i de chaque bras 15. Lorsque la vanne 1 est en service, le ressort 40 est prévu pour rappeler le piston 22 en direction de la coupelle 21 lorsque la matière thermodilatable contenue dans cette coupelle se contracte suite à une baisse de sa température.  The lower end 15-i of each arm 15 is in the form of a hook whose recess is directed upwards. This recess is adapted to receive the lower end turn 41 of the spring 40, the hook shape providing a transverse wedge for this turn 41. In the assembled state of the valve 1, the spring 40 is interposed in a compressed state. between the ends 15-i of the arms 15 and the shutter 30, being centered on the axis XX and with its upper end turn 42 coaxially surrounding a projecting skirt 33 provided at the lower end of the rod 31: thus, the turn 41 is in pressing contact down against the bottom surface 15A of the recess delimited by the lower end 15i of each arm 15. When the valve 1 is in operation, the spring 40 is provided for recall the piston 22 in the direction of the cup 21 when the heat-shrinkable material contained in this cup contracts after a drop in its temperature.
A son extrémité supérieure 152, chaque bras 15 est venu de manière avec une portion retreinte de l'extrémité inférieure de la partie tubulaire 13. Pour des raisons liées à l'assemblage de la vanne 1 , comme expliqué en détail ci-après, l'extrémité 152 de chaque bras 15 est déformable à la façon d'une charnière de manière que le bras est déplaçable par rapport au reste du corps de vanne 10 par basculement autour d'un axe géométrique 15B s'étendant au niveau axial de l'extrémité 152, suivant une direction orthoradiale à l'axe X-X, comme indiqué sur les figures 1 à 3. Avant de décrire plus en détail l'assemblage de la vanne 1 , c'est-à-dire la mise en place, à l'intérieur du corps de vanne 10, à la fois de l'élément thermostatique 20, de l'obturateur 30 et du ressort comprimé 40, on notera que le corps de vanne 10 est préalablement obtenu par moulage d'une matière plastique de sorte que, en sortie de moule, ce corps de vanne présente la configuration représentée sur les figures 2 à 6. Plus précisément, lorsqu'on considère le corps de vanne 10 en sortie de moule, les bras 15 ne s'étendent pas de manière rigoureusement parallèle à l'axe X-X, mais sont inclinés par rapport à cet axe, en s'éloignant de l'axe vers le bas, comme bien visible sur la figure 6. En coupe longitudinale au corps de vanne 10, l'angle a formé entre la direction longitudinale de chaque bras 15 et l'axe X-X vaut ainsi quelques degrés, par exemple 5° environ. Autrement dit, la distance radiale maximale entre l'extrémité inférieure 15-i de chaque bras et l'axe X-X est supérieure à la distance radiale entre l'extrémité supérieure 152 et cet axe. At its upper end 2 , each arm 15 is integrally formed with a constricted portion of the lower end of the tubular portion 13. For reasons related to the assembly of the valve 1, as explained in detail below, the end 15 2 of each arm 15 is deformable in the manner of a hinge so that the arm is movable relative to the remainder of the valve body 10 by tilting about a geometric axis 15B extending at the axial level of the end 2 , in a direction orthoradial to the axis XX, as shown in Figures 1 to 3. Before describing in more detail the assembly of the valve 1, that is to say the placement, inside the valve body 10, of both the thermostatic element 20, the shutter 30 and the compressed spring 40, it will be noted that the valve body 10 is previously obtained by molding a plastic material so that, at the outlet of the mold, this valve body has the configuration shown in FIGS. 2 to 6. More specifically, when considering the valve body 10 at the mold outlet, the arms 15 do not extend strictly parallel to the axis XX, but are inclined relative to this axis, away from the axis downwards, as clearly visible in Figure 6. In longitudinal section to the valve body 10, the angle formed between the longitudinal direction of each arm 15 and the axis XX is thus a few degrees, for example about 5 ° . In other words, the maximum radial distance between the lower end 15-i of each arm and the axis XX is greater than the radial distance between the upper end 2 and this axis.
Dans cette position de moulage des bras 15, qui correspond à une position de repos de ces bras, les extrémités inférieures 15i des bras 15 sont insuffisamment distantes de l'axe X-X pour ne pas gêner l'introduction axiale, par le bas, des autres composants de la vanne 1 , en particulier du ressort 40, dans le corps de vanne 10. Autrement dit, dans cette position de repos des bras 15, la distance radiale minimale, notée d„ dans la partie droite de la figure 6, entre l'axe X-X et la surface 15A de l'extrémité inférieure 15i de chaque bras 15 est inférieure à la dimension radiale maximale correspondante d4o (figure 7) du ressort 40, c'est-à-dire, ici, le diamètre extérieur des spires 41 ou 42, ainsi qu'à la dimension radiale correspondante d3o du rebord 32 de l'obturateur 30. In this molding position of the arms 15, which corresponds to a rest position of these arms, the lower ends 15i of the arms 15 are insufficiently distant from the axis XX to not interfere with the axial introduction, from below, the other components of the valve 1, in particular the spring 40, in the valve body 10. In other words, in this rest position of the arms 15, the minimum radial distance, denoted d "in the right part of FIG. XX axis and the surface 15A of the lower end 15i of each arm 15 is smaller than the corresponding maximum radial dimension d 4 o (Figure 7) of the spring 40, that is to say, here, the outer diameter of turns 41 or 42 and the corresponding radial dimension d 3 o of the flange 32 of the shutter 30.
Dans ces conditions, pour assembler la vanne 1 , on écarte de l'axe X-X l'extrémité inférieure 15-i de chaque bras 15, en déformant son extrémité supérieure 152 pour basculer le bras vers l'extérieur autour de l'axe 15B, jusqu'à ce que la distance radiale entre l'axe X-X et la surface 15A, notée alors dp sur la figure 7, soit supérieure aux dimensions radiales correspondantes d40 et d3o du ressort 40 et de l'obturateur 30. L'inclinaison des bras par rapport à l'axe X-X augmente, en passant de l'angle a à l'angle β. Avantageusement, pour entraîner les bras 15 depuis leur position de repos de la figure 6 à leur position extrême d'écartement de la figure 7, on utilise un outillage ad hoc, non représenté sur les figures, qui coopère par complémentarité de formes avec des ergots saillants 16 prévus à l'extrémité inférieure 15i de chaque bras 15 : ces ergots 16, bien visibles sur les figures 2 et 3, s'étendent en saillie suivant une direction sensiblement parallèle à l'axe de basculement 15B, depuis respectivement les chants latéraux de l'extrémité inférieure 15-i du bras 15. Ces ergots 16 sont ainsi faciles à approcher et à manipuler grâce à l'outillage précité, tout en maîtrisant l'amplitude du mouvement de basculement appliqué au bras 15, étant remarqué que l'intensité des contraintes de déformation appliquées à l'extrémité 152 du bras est directement dépendante de cette amplitude de mouvement. Under these conditions, to assemble the valve 1, one deviates from the axis XX the lower end 15-i of each arm 15, deforming its upper end 15 2 to tilt the arm outwardly about the axis 15B , until the radial distance between the axis XX and the surface 15A, then denoted dp in FIG. 7, is greater than the corresponding radial dimensions d 40 and d 3 o of the spring 40 and the shutter 30. inclination of the arms relative to the axis XX increases, passing from the angle a to the angle β. Advantageously, to drive the arms 15 from their rest position of FIG. 6 to their extreme spacing position of FIG. 7, an ad hoc tooling, not shown in the figures, is used which cooperates by complementarity of shapes with spurs. protrusions 16 provided at the lower end 15i of each arm 15: these lugs 16, clearly visible in Figures 2 and 3, projecting in a direction substantially parallel to the axis of tilting 15B, since the side edges respectively of the lower end 15-i of the arm 15. These lugs 16 are thus easy to approach and to manipulate using the aforementioned tool, while controlling the amplitude of the tilting movement applied to the arm 15, being noted that the intensity of the deformation stresses applied to the end 2 of the arm is directly dependent on this range of motion .
Lorsque les bras 15 sont dans leur configuration extrême écartée de la figure 7, en y étant notamment maintenus par l'outillage d'entraînement ad hoc précité, l'élément thermostatique 20, l'obturateur 30 et le ressort 40 sont introduits axialement à l'intérieur du corps de vanne 10, du bas vers le haut sur les figures. L'introduction de l'élément thermostatique 20 est réalisée jusqu'à ce que la collerette 23 de sa coupelle 21 vienne s'appuyer axialement contre le rebord 12 de la partie 1 1 du corps de vanne 10. L'obturateur 30 est introduit conjointement avec l'élément thermostatique. Il en est éventuellement de même pour le ressort 40. Dans tous les cas, ce ressort 40 est introduit progressivement entre les bras 15, comme montré sur la figure 7, jusqu'à comprimer le ressort 40 vers le haut, la spire d'extrémité supérieure 42 s'appuyant axialement contre l'extrémité inférieure de l'obturateur 30. Cette mise en compression du ressort 40 est poursuivie par entraînement vers le haut de la spire d'extrémité inférieure 41 , jusqu'à ce que cette dernière soit axialement disposée au-dessus du niveau axial des extrémités inférieures 15-i des bras 15. En pratique, la compression du ressort est avantageusement réalisée par un outillage s'étendant transversalement à l'axe X-X, entre les bras 15 suivant la périphérie du corps de vanne 10.  When the arms 15 are in their extreme configuration spaced apart from FIG. 7, in particular being held there by the above-mentioned ad hoc drive tooling, the thermostatic element 20, the shutter 30 and the spring 40 are introduced axially at the same time. inside the valve body 10, from bottom to top in the figures. The introduction of the thermostatic element 20 is carried out until the collar 23 of its cup 21 comes to bear axially against the rim 12 of the part 1 1 of the valve body 10. The shutter 30 is introduced jointly with the thermostatic element. It is possibly the same for the spring 40. In all cases, this spring 40 is introduced gradually between the arms 15, as shown in FIG. 7, until the spring 40 is compressed upwards, the end turn upper 42 bearing axially against the lower end of the shutter 30. This compression of the spring 40 is continued by driving upwardly of the lower end turn 41, until the latter is axially arranged Above the axial level of the lower ends 15-i of the arms 15. In practice, the compression of the spring is advantageously achieved by a tool extending transversely to the axis XX, between the arms 15 along the periphery of the valve body. 10.
Tout en maintenant le ressort 40 dans cet état comprimé, les bras 15 sont alors basculés vers l'intérieur, c'est-à-dire en direction de l'axe X-X, autour de leur axe 15B, notamment à l'aide de l'outillage d'entraînement ad hoc précité. Les extrémités inférieures 15i des bras sont ainsi chacune approchée de l'axe X-X, jusqu'à ce que ces extrémités soient disposées axialement à l'aplomb de la spire 41 du ressort 40 : la distance radiale entre l'axe X-X et la surface 15A de l'extrémité inférieure 15-i de chaque bras 15, notée alors d0 sur la figure 8, est inférieure à la distance radiale d40 du ressort 40. En étant ainsi basculé vers l'intérieur, les bras 15 repassent par leur position de repos, ce qui revient à dire que, dans une première phase de ce basculement vers l'intérieur, les extrémités supérieures 152 des bras 15 se déforment en sens inverse de leur déformation pour passer de la figure 6 à la figure 7, puis, dans une seconde phase, poursuivent leur déformation dans ce sens inverse, jusqu'à ce que les bras atteignent la position extrême rapprochée de la figure 8. On comprend ainsi que la distance précitée d0 est inférieure à la distance de repos d„. While maintaining the spring 40 in this compressed state, the arms 15 are then tilted inwards, that is to say in the direction of the axis XX, about their axis 15B, in particular using the aforementioned ad hoc training tool. The lower ends 15i of the arms are thus each approached to the axis XX, until these ends are arranged axially in line with the turn 41 of the spring 40: the radial distance between the axis XX and the surface 15A the lower end 15-i of each arm 15, then denoted d 0 in Figure 8, is smaller than the radial distance d 40 of the spring 40. Being thus tilted inwards, the arms 15 return by their position of rest, which is to say that, in a first phase of this inward tilting, the upper ends 15 2 of the arms 15 deform in the opposite direction of their deformation to move from Figure 6 to Figure 7, and then in a second phase, continue their deformation in the opposite direction, until the arms reach the extreme close position of Figure 8. It is thus understood that the aforesaid distance d 0 is less than the rest distance d ".
L'outillage maintenant le ressort 40 à l'état comprimé est alors retiré, permettant une décompression partielle du ressort, jusqu'à ce que sa spire 41 vienne s'appuyer contre la surface 15A des extrémités 15i du bras 15. La vanne 1 est alors dans la configuration représentée sur la figure 8, qui correspond à celle montrée en coupe longitudinale à la figure 1. Dans cette configuration, la spire 41 est calée dans les évidements délimités par la forme en crochet des extrémités 15-i des bras 15 et empêche ces extrémités de s'écarter l'une de l'autre, notamment sous l'effet de la tendance de ces extrémités à se déformer spontanément pour faire retrouver aux bras 15 leur position de repos, c'est-à-dire leur configuration initiale de sortie de moule. L'outillage d'entraînement des bras 15 utilisés jusqu'ici peut alors être dégagé. The tooling now the spring 40 in the compressed state is then removed, allowing partial decompression of the spring, until its turn 41 comes to rest against the surface 15A of the ends 15i of the arm 15. The valve 1 is then in the configuration shown in Figure 8, which corresponds to that shown in longitudinal section in Figure 1. In this configuration, the coil 41 is wedged in the recesses delimited by the hook shape of the ends 15-i of the arms 15 and prevents these ends from moving apart from one another, in particular under the effect of the tendency of these ends to deform spontaneously to make the arms Their rest position, i.e., their initial mold exit configuration. The drive tooling of the arms 15 used so far can then be cleared.
Avantageusement, dans la position extrême rapprochée des bras 15 de la figure 8, ces bras s'étendent de manière sensiblement parallèle à l'axe X-X : de la sorte, le corps de vanne 10, en particulier sa partie inférieure incluant les bras 15, peut être facilement implanté au sein du circuit de circulation de fluide évoqué plus haut, notamment à l'intérieur du boîtier 2.  Advantageously, in the extreme close position of the arms 15 of FIG. 8, these arms extend substantially parallel to the axis XX: in this way, the valve body 10, in particular its lower part including the arms 15, can be easily implanted within the fluid circulation circuit mentioned above, especially inside the housing 2.
L'assemblage de la vanne 1 est particulièrement rapide et facile, les différentes étapes de cet assemblage pouvant notamment être automatisées, en particulier le long d'une chaîne d'assemblage. De plus, aucune pièce, notamment de rigidification, n'est à rapporter au corps de vanne 10. Grâce au fait que, en sortie de moule, chaque bras 15 occupe une position intermédiaire entre sa position extrême écartée de la figure 7 et sa position extrême rapprochée de la figure 8, les contraintes de déformation subies par son extrémité supérieure 152 pour entraîner le bras entre ces deux positions extrêmes sont limitées. D'ailleurs, les contraintes de déformation pour passer chaque bras 15 de sa position de repos à sa position extrême écartée sont avantageusement du même ordre de grandeur que les contraintes de déformation pour passer le bras de sa position de repos à sa position extrême rapprochée : pour ce faire, l'inclinaison des bras dans leur position de repos, par rapport à l'axe X-X, vaut sensiblement la moitié de leur inclinaison lorsqu'ils sont dans leur position extrême écartée, ce qui revient à dire que l'angle a vaut environ la moitié de l'angle β. The assembly of the valve 1 is particularly fast and easy, the various steps of this assembly can be automated in particular, especially along an assembly line. In addition, no part, in particular stiffening, is to relate to the valve body 10. Due to the fact that, at the outlet of the mold, each arm 15 occupies an intermediate position between its extreme position apart from Figure 7 and its position 8, the deformation stresses undergone by its upper end 2 to drive the arm between these two extreme positions are limited. Moreover, the deformation stresses for passing each arm 15 from its rest position to its far end position are advantageously of the same order of magnitude as the deformation stresses to move the arm from its rest position to its close-out position: to do this, the inclination of the arms in their rest position, relative to the axis XX, is substantially half of their inclination when they are in their extreme extended position, which is to say that the angle a is worth about half of the angle β.
A titre d'option avantageuse, qui peut d'ailleurs être mise en œuvre indépendamment de la présence des bras 15, le siège d'obturation 13A prévu à l'extrémité inférieure de la partie tubulaire 13 est délimité par un joint d'étanchéité 17 rapporté par surmoulage à la partie 13. Ce joint 17 est réalisé en particulier en silicone ou en un élastomère thermoplastique (TPE). En pratique, ce joint 17 est surmoulé sur la partie tubulaire 13, depuis l'extérieur de cette partie. Pour ce faire, comme représenté sur les figures 1 et 4, la paroi de la partie 13 est traversée transversalement par un canal 13C qui relie la zone du siège 13A et la face latérale extérieure du corps de vanne 10 : ce canal 13C est alimenté par le matériau constituant le joint 17 lorsque ce matériau est à l'état liquide, notamment par traitement thermique, depuis l'extérieur de la partie tubulaire 13, comme indiqué par la flèche C sur la figure 4. As an advantageous option, which can also be implemented independently of the presence of the arms 15, the closure seat 13A provided at the lower end of the tubular portion 13 is delimited by a seal 17 This seal 17 is made in particular of silicone or a thermoplastic elastomer (TPE). In practice, this seal 17 is overmolded on the tubular portion 13, from outside this part. To do this, as shown in Figures 1 and 4, the wall of the portion 13 is traversed transversely by a channel 13C which connects the seat area 13A and the outer side face of the valve body 10: this channel 13C is powered by the material constituting the joint 17 when this material is the liquid state, in particular by heat treatment, from the outside of the tubular part 13, as indicated by the arrow C in FIG.
Toujours dans le cadre de l'option avantageuse évoquée ci-dessus et comme bien visible sur la figure 3, la face latérale extérieure de la partie 13 délimite avantageusement une gorge périphérique 13D reliée, dans l'épaisseur de la paroi de la partie 13, au canal 13C. De la sorte, lorsque ce canal 13C est alimenté avec le matériau constituant le joint 17, ce matériau se répand également dans la gorge 13D et, moyennant l'utilisation d'un moule adéquat, un joint d'étanchéité 18 est alors surmoulé extérieurement autour de la partie tubulaire 13, en étant venu de moulage avec le joint 17. Avantageusement, comme bien visible sur la figure 4, plusieurs passages traversants transversaux 13E, délimités dans l'épaisseur de la paroi de la partie 13 et répartis de manière sensiblement régulière autour de l'axe X-X, relient l'un à l'autre les joints 17 et 18 en plus du passage associé au canal d'alimentation 13C. Comme représenté sur la figure 1 , ce joint 18 permet, lorsque la vanne 1 est reçue dans le boîtier 2, de former un contact étanche avec ce boîtier.  Still within the framework of the advantageous option mentioned above and as clearly visible in FIG. 3, the external lateral face of the part 13 advantageously delimits a peripheral groove 13D connected, in the thickness of the wall of the part 13, at channel 13C. In this way, when this channel 13C is fed with the material constituting the seal 17, this material also spreads in the groove 13D and, by using a suitable mold, a seal 18 is then overmolded around the outside of the tubular portion 13, being molded with the seal 17. Advantageously, as clearly visible in Figure 4, a plurality of transverse through passages 13E, delimited in the thickness of the wall of the portion 13 and distributed substantially regularly around the axis XX, connect to each other the seals 17 and 18 in addition to the passage associated with the feed channel 13C. As shown in Figure 1, this seal 18 allows, when the valve 1 is received in the housing 2, to form a sealed contact with the housing.
Toujours dans le cadre de l'option avantageuse évoquée ci-dessus, la partie 1 1 du corps de vanne 10 est, elle aussi, pourvue de joints d'étanchéité rapportés par surmoulage. Plus précisément, comme bien visible sur les figures 3 et 5, un joint 19 est rapporté à l'intérieur du rebord 12 de la partie 1 1 , de manière à se trouver radialement interposé entre la partie 1 1 et la coupelle 21 de l'élément thermostatique 20. De plus, un joint 1 10 court sur la face latérale extérieure de la partie 1 1 pour, comme montré sur la figure 1 , former un contact étanche avec le boîtier 2 lorsque la vanne 1 est reçue dans ce dernier. Suivant des dispositions similaires aux joints 17 et 18, les joints 19 et 1 10 sont venus de matière l'un avec l'autre, via un passage traversant transversal 1 1A (figure 3) délimité dans l'épaisseur de la paroi de la partie 1 1 .  Still in the context of the advantageous option mentioned above, the part 1 1 of the valve body 10 is also provided with seals reported by overmolding. More precisely, as clearly visible in FIGS. 3 and 5, a seal 19 is attached inside the rim 12 of the part 1 1, so as to be radially interposed between the part 1 1 and the cup 21 of the thermostatic element 20. In addition, a seal 1 10 runs on the outer lateral face of the part 1 1 for, as shown in Figure 1, forming a sealed contact with the housing 2 when the valve 1 is received therein. Following arrangements similar to the seals 17 and 18, the seals 19 and 1 10 are integral with one another via a transverse through passage 11A (FIG. 3) delimited in the thickness of the wall of the part. 1 1.
Divers aménagements et variantes à la vanne 1 et à son procédé de fabrication sont par ailleurs envisageables. A titre d'exemples :  Various arrangements and variants of the valve 1 and its manufacturing process are also possible. As examples:
- plus de deux bras 15 de support du ressort 40 peuvent être venus de matière avec le reste du corps de vanne 10, en étant notamment répartis de manière uniforme autour de l'axe X-X ;  - More than two support arms 15 of the spring 40 can be integral with the rest of the valve body 10, in particular being distributed uniformly about the axis X-X;
- la géométrie extérieure du corps de vanne 10 n'est pas limité à celle représentée aux figures, en particulier à des fins d'adaptation dimensionnelle et/ou géométrique au boîtier 2 à l'intérieur duquel la vanne 1 est destinée à être assemblée ; et/ou  - The outer geometry of the valve body 10 is not limited to that shown in the figures, in particular for dimensional and / or geometric adaptation to the housing 2 within which the valve 1 is intended to be assembled; and or
- le sens de circulation du fluide peut être inversé par rapport à celui indiqué par les flèches 4 sur les figures 1 et 3.  - The flow direction of the fluid can be reversed from that indicated by the arrows 4 in Figures 1 and 3.

Claims

REVENDICATIONS
1. - Vanne thermostatique (1 ) pour un circuit de circulation de fluide, comprenant :1. - Thermostatic valve (1) for a fluid circulation circuit, comprising:
- un corps de vanne (10) réalisé en une matière plastique et définissant une voie (13B) d'écoulement d'un fluide à travers lui, a valve body (10) made of a plastics material and defining a flow path (13B) of a fluid therethrough,
- un élément thermostatique (20) contenant une matière thermodilatable et comportant une partie fixe (21 ), immobilisée par rapport au corps de vanne (10), et une partie mobile (21 ) qui, sous l'effet d'une variation de volume de la matière thermodilatable, est déplaçable suivant un axe (X-X) de l'élément thermostatique par rapport à la partie fixe et qui commande en déplacement un obturateur (30) de régulation de la circulation du fluide dans la voie (13B), et  a thermostatic element (20) containing a thermally expandable material and comprising a fixed part (21) immobilized with respect to the valve body (10) and a movable part (21) which, under the effect of a volume variation, of the thermally expandable material, is movable along an axis (XX) of the thermostatic element relative to the fixed part and which drives in displacement a shutter (30) for regulating the circulation of the fluid in the channel (13B), and
- un ressort comprimé (40), qui est adapté pour rappeler les parties fixe (21 ) et mobile (22) de l'élément thermostatique (20) l'une vers l'autre et dont l'effort de décompression est supporté par au moins deux bras (15) du corps de vanne (10), qui s'étendent en longueur globalement selon la direction axiale de l'élément thermostatique et dont une première (152) de leurs extrémités longitudinales opposées (15^ 152) est venue de moulage avec le reste du corps de vanne, - A compressed spring (40), which is adapted to recall the fixed (21) and movable (22) parts of the thermostatic element (20) towards each other and whose decompression force is supported by the minus two arms (15) of the valve body (10), which extend in length generally in the axial direction of the thermostatic element and of which a first (15 2 ) of their opposite longitudinal ends (15 ^ 15 2 ) is come molding with the rest of the valve body,
caractérisée en ce que, à sa seconde extrémité longitudinale (15 , chaque bras (15) délimite une surface (15A) de contact avec le ressort (40) contre laquelle une extrémité (41 ) du ressort s'appuie sous l'effet de sa décompression, et en ce que, à sa première extrémité (152), chaque bras (15) est lié au reste du corps de vanne (10) de façon déformable entre une première position extrême (figure 8), dans laquelle la surface de contact (15A) de ce bras est disposée à l'aplomb de l'extrémité (41 ) du ressort (40) suivant la direction de décompression de ce ressort, et une seconde position extrême (figure 7), dans laquelle la surface de contact est écartée, en s'éloignant de l'axe (X-X) de l'élément thermostatique (20), de la place qu'elle occupe lorsque le bras est dans sa première position extrême, en passant par une position (figure 6) intermédiaire entre ces première et seconde positions extrêmes, qui est occupée par le bras au repos et dans laquelle la surface de contact (15A) de ce bras est située à une distance radiale (d„) vis-à- vis de l'axe (X-X) de l'élément thermostatique, inférieure à la dimension radiale maximale correspondante (d4o) du ressort (40). characterized in that, at its second longitudinal end (15, each arm (15) delimits a surface (15A) of contact with the spring (40) against which an end (41) of the spring bears under the effect of its decompression, and in that, at its first end (15 2 ), each arm (15) is connected to the remainder of the valve body (10) deformably between a first end position (Figure 8), in which the surface of contact (15A) of this arm is disposed in line with the end (41) of the spring (40) in the direction of decompression of this spring, and a second extreme position (Figure 7), in which the contact surface is moved away from the axis (XX) of the thermostatic element (20), the place it occupies when the arm is in its first extreme position, through an intermediate position (Figure 6) between these first and second extreme positions, which is occupied by the arm at rest and in which e the contact surface (15A) of this arm is located at a radial distance (d ") with respect to the axis (XX) of the thermostatic element, less than the corresponding maximum radial dimension (d 4 o ) of the spring (40).
2. - Vanne suivant la revendication 1 , caractérisée en ce que chaque bras (15) est déplaçable depuis sa position intermédiaire à chacune de ses première et seconde positions extrêmes par basculement autour d'un axe (15B) sensiblement orthoradial à l'axe (X-X) de l'élément thermostatique (20). 2. - valve according to claim 1, characterized in that each arm (15) is movable from its intermediate position to each of its first and second extreme positions by tilting about an axis (15B) substantially orthoradial to the axis ( XX) of the thermostatic element (20).
3. - Vanne suivant l'une des revendications 1 ou 2, caractérisée en ce que, dans leur première position extrême, les bras (15) s'étendent en longueur de manière sensiblement parallèle à l'axe (X-X) de l'élément thermostatique (20), et en ce que l'inclinaison (a), par rapport à cet axe, de la direction longitudinale de chaque bras en position intermédiaire vaut sensiblement la moitié de l'inclinaison (β) du bras dans sa seconde position extrême. 3. - valve according to one of claims 1 or 2, characterized in that, in their first extreme position, the arms (15) extend in length substantially parallel to the axis (XX) of the element thermostatic (20), and in that the inclination (a), with respect to this axis, of the longitudinal direction of each arm in the intermediate position is substantially half of the inclination (β) of the arm in its second extreme position .
4. - Vanne suivant l'une quelconque des revendications précédentes, caractérisée en ce que la seconde extrémité (15i) de chaque bras (15) présente une forme de crochet dont l'évidement est adapté pour recevoir une spire d'extrémité (41 ) du ressort (40), le fond de cet évidement délimitant la surface de contact (15A).  4. - valve according to any one of the preceding claims, characterized in that the second end (15i) of each arm (15) has a hook shape whose recess is adapted to receive an end turn (41). spring (40), the bottom of this recess delimiting the contact surface (15A).
5. - Vanne suivant l'une quelconque des revendications précédentes, caractérisée en ce que la seconde extrémité (15i) de chaque bras (15) est pourvue d'au moins un relief (16) de coopération, par complémentarité de formes, avec un outillage d'entraînement du bras depuis sa position intermédiaire à chacune de ses première et seconde positions extrêmes.  5. - valve according to any one of the preceding claims, characterized in that the second end (15i) of each arm (15) is provided with at least one relief (16) of cooperation, by complementarity of shapes, with a arm drive tooling from its intermediate position to each of its first and second extreme positions.
6. - Vanne suivant l'une quelconque des revendications précédentes, caractérisée en ce que le corps de vanne (10) inclut une partie tubulaire (13) d'appui pour l'obturateur (30), qui est sensiblement centrée sur l'axe (X-X) de l'élément thermostatique (20), qui délimite intérieurement au moins partiellement la voie (13B) d'écoulement du fluide, depuis laquelle s'étendent les bras (15), et à laquelle est rapporté par surmoulage un premier joint d'étanchéité (17) délimitant un siège d'obturation (13A) coopérant par contact avec l'obturateur (30) pour fermer la circulation du fluide dans la voie.  6. - valve according to any one of the preceding claims, characterized in that the valve body (10) includes a tubular portion (13) for supporting the shutter (30), which is substantially centered on the axis (XX) of the thermostatic element (20), which at least partially delimits at least partially the fluid flow path (13B), from which the arms (15) extend, and to which a first seal is overmolded; sealing member (17) delimiting a closure seat (13A) cooperating by contact with the shutter (30) to close the circulation of the fluid in the channel.
7. - Vanne suivant la revendication 6, caractérisée en ce que la partie tubulaire d'appui (13) est pourvue d'un deuxième joint d'étanchéité (18) qui s'étend suivant la périphérie extérieure de la partie tubulaire d'appui pour former un contact étanche avec un boîtier (2) de réception du corps de vanne (10), et qui est venu de moulage avec le premier joint d'étanchéité (17), via au moins un passage traversant transversal (13C, 13E), délimité dans l'épaisseur de la partie tubulaire d'appui.  7. - valve according to claim 6, characterized in that the tubular bearing portion (13) is provided with a second seal (18) which extends along the outer periphery of the tubular support part for forming a sealing contact with a housing (2) for receiving the valve body (10), and which has been molded with the first seal (17), via at least one transverse through passage (13C, 13E) delimited in the thickness of the tubular support part.
8. - Vanne suivant l'une quelconque des revendications précédentes, caractérisée en ce que le corps de vanne (10) inclut une partie tubulaire (1 1 ) d'immobilisation de l'élément thermostatique (20), qui est sensiblement centrée sur l'axe (X-X) de l'élément thermostatique, dans laquelle est reçue la partie fixe (21 ) de l'élément thermostatique avec interposition d'un troisième joint d'étanchéité (19) rapporté par surmoulage à cette partie tubulaire d'immobilisation, et qui est pourvue d'un quatrième joint d'étanchéité (1 10) qui s'étend suivant la périphérie extérieure de la partie tubulaire d'immobilisation pour former un contact étanche avec un boîtier (2) de réception du corps de vanne et qui est venu de moulage avec le troisième joint d'étanchéité (19), via au moins un passage traversant transversal (1 1 A), délimité dans l'épaisseur de cette partie tubulaire d'immobilisation. 8. - valve according to any one of the preceding claims, characterized in that the valve body (10) includes a tubular portion (1 1) of immobilization of the thermostatic element (20), which is substantially centered on the axis (XX) of the thermostatic element, in which is received the fixed portion (21) of the thermostatic element with interposition of a third seal (19) reported by overmolding to this tubular immobilization part, and which is provided with a fourth seal (1 10) which extends along the outer periphery of the tubular immobilizing portion to form a sealing contact with a housing (2) for receiving the valve body and which is molded with the third seal (19), via at least one transverse through passage (1 1 A) delimited in the thickness of this tubular immobilization part.
9. - Vanne suivant l'une quelconque des revendications 6 à 8, caractérisée en ce qu'au moins l'un des premier, deuxième, troisième et quatrième joints d'étanchéité (17, 9. Valve according to any one of claims 6 to 8, characterized in that at least one of the first, second, third and fourth seals (17,
18, 19, 1 10) est réalisé en silicone ou en un élastomère thermoplastique. 18, 19, 1 10) is made of silicone or a thermoplastic elastomer.
10. - Procédé de fabrication d'une vanne thermostatique (1 ), dans lequel on dispose :  10. - Method of manufacturing a thermostatic valve (1), in which:
- d'un corps de vanne (10) réalisé en une matière plastique et définissant une voie (13B) d'écoulement d'un fluide à travers lui,  a valve body (10) made of a plastics material and defining a flow path (13B) of a fluid therethrough,
- d'un élément thermostatique (20) contenant une matière thermodilatable et comportant une partie fixe (21 ) à immobiliser par rapport au corps de vanne (10), et une partie mobile (22) qui, sous l'effet d'une variation de volume de la matière thermodilatable, est déplaçable suivant un axe (X-X) de l'élément thermostatique par rapport à la partie fixe et qui commande en déplacement un obturateur (30) de régulation de la circulation du fluide dans la voie (13B), et  - a thermostatic element (20) containing a thermally expandable material and having a fixed part (21) to be immobilized with respect to the valve body (10), and a movable part (22) which, under the effect of a variation of volume of the thermally expandable material, is movable along an axis (XX) of the thermostatic element relative to the fixed part and which drives in displacement a shutter (30) for regulating the circulation of the fluid in the channel (13B), and
- d'un ressort comprimé (40), qui est adapté pour rappeler les parties fixe (21 ) et mobile (22) de l'élément thermostatique (20) l'une vers l'autre et dont l'effort de décompression est à supporter par au moins deux bras (15) du corps de vanne (10), qui s'étendent en longueur globalement selon la direction axiale de l'élément thermostatique et dont une première (152) de leurs extrémités longitudinales opposées (15^ 152) est venue de moulage avec le reste du corps de vanne, - A compressed spring (40), which is adapted to return the fixed parts (21) and movable (22) of the thermostatic element (20) towards one another and whose decompression force is at supported by at least two arms (15) of the valve body (10), which extend in length generally in the axial direction of the thermostatic element and a first (15 2 ) of their opposite longitudinal ends (15 ^ 15 2 ) came molding with the rest of the valve body,
caractérisé en ce que, pour disposer du corps de vanne (10), la matière plastique est moulée de sorte que, en sortie de moule, chaque bras, d'une part, délimite, à sa seconde extrémité longitudinale (15i), une surface (15A) de contact avec le ressort (40) contre laquelle une extrémité (41 ) du ressort est à appuyer sous l'effet de sa décompression et, d'autre part, occupe une position de moulage (figure 6) dans laquelle cette surface de contact (15A) est située à une distance radiale (d„) vis-à-vis de l'axe (X-X) de l'élément thermostatique inférieure à la dimension radiale correspondante (d40) de cette extrémité du ressort, characterized in that, for disposing the valve body (10), the plastics material is molded so that, at the mold outlet, each arm, on the one hand, delimits, at its second longitudinal end (15i), a surface (15A) contact with the spring (40) against which one end (41) of the spring is to press under the effect of its decompression and, secondly, occupies a molding position (Figure 6) in which the surface contact piece (15A) is located at a radial distance (d ") with respect to the axis (XX) of the thermostatic element which is smaller than the corresponding radial dimension (d 40 ) of this end of the spring,
et en ce que le procédé comporte des étapes successives suivant lesquelles : and in that the method comprises successive steps according to which:
- on écarte de l'axe (X-X) de l'élément thermostatique (20) la seconde extrémité (15^ de chaque bras (15), en déformant sa première extrémité (152), jusqu'à ce que le bras occupe une première position extrême (figure 7) dans laquelle la distance radiale (dp) entre l'axe et la surface de contact (15A) de ce bras soit supérieure à la dimension radiale correspondante (d4o) de l'extrémité (41 ) du ressort (40), - tout en maintenant chaque bras (15) dans sa première position extrême, on introduit, suivant l'axe (X-X) de l'élément thermostatique (20), le ressort (40) entre les bras (15) et on comprime axialement ce ressort, en direction de la première extrémité (152) des bras, au-delà du niveau axial de la seconde extrémité (15^ des bras, - away from the axis (XX) of the thermostatic element (20) the second end (15 ^ of each arm (15), deforming its first end (15 2 ), until the arm occupies a first extreme position (Figure 7) in which the radial distance (dp) between the axis and the contact surface (15A) of this arm is greater than the corresponding radial dimension (d 4 o) of the end (41) of the spring (40), while keeping each arm (15) in its first extreme position, the spring (40) between the arms (15) is introduced along the axis (XX) of the thermostatic element (20) and this axially compressed spring, towards the first end (15 2 ) of the arms, beyond the axial level of the second end (15 ^ arms,
- tout en maintenant le ressort ainsi comprimé, on approche de l'axe (X-X) de l'élément thermostatique (20) la seconde extrémité (15-i) de chaque bras (15), en déformant sa première extrémité (152), jusqu'à ce que le bras, après être passé par sa position de moulage (figure 6), occupe une seconde position extrême (figure 8), dans laquelle sa surface de contact (15A) est, à la fois, située à une distance radiale (d0), vis-à- vis de l'axe (X-X), inférieure à la distance radiale (d„) à laquelle est située cette surface de contact lorsque le bras occupe sa position de moulage, et disposée sensiblement à l'aplomb de l'extrémité (41 ) du ressort (40) suivant la direction de décompression du ressort, et while maintaining the spring thus compressed, approaching the axis (XX) of the thermostatic element (20) the second end (15-i) of each arm (15), deforming its first end (15 2 ) , until the arm, after having passed through its molding position (FIG. 6), occupies a second extreme position (FIG. 8), in which its contact surface (15A) is, at the same time, located at a radial distance (d 0 ), vis-à-vis the axis (XX), less than the radial distance (d ") at which this contact surface is located when the arm occupies its molding position, and disposed substantially at the plumb with the end (41) of the spring (40) in the direction of decompression of the spring, and
- on décomprime le ressort (40) jusqu'à ce que l'extrémité (41 ) de ce ressort vienne presser la surface de contact (15A) de chaque bras (15).  the spring (40) is decompressed until the end (41) of this spring comes to press the contact surface (15A) of each arm (15).
PCT/FR2011/050567 2010-03-23 2011-03-21 A thermostatic valve for a fluid flow circuit and method of manufacturing such a valve WO2011117518A1 (en)

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CN201180023070.3A CN102884294B (en) 2010-03-23 2011-03-21 A thermostatic valve for a fluid flow circuit and method of manufacturing such a valve
CA2806467A CA2806467C (en) 2010-03-23 2011-03-21 A thermostatic valve for a fluid flow circuit and method of manufacturing such a valve

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FR1052085 2010-03-23
FR1052085A FR2958002B1 (en) 2010-03-23 2010-03-23 THERMOSTATIC VALVE FOR A FLUID CIRCUIT CIRCUIT AND METHOD OF MANUFACTURING SUCH VALVE

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TR201714299A1 (en) * 2017-09-26 2019-04-22 Kirpart Otomotiv Parcalari Sanayi Ve Ticaret A S THERMOSTAT ASSEMBLY WITH IMPROVED BYPASS CONTROL
DE202019001118U1 (en) 2019-03-08 2019-05-24 Gebr. Kemper Gmbh + Co. Kg Metallwerke Valve for drinking water installation
JP2022115622A (en) * 2021-01-28 2022-08-09 日本サーモスタット株式会社 thermostat device

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GB830097A (en) * 1957-02-04 1960-03-09 Dole Valve Co Improvements in or relating to thermostatically controlled valves
DE1245642B (en) * 1964-04-21 1967-07-27 Mecano Bundy Gmbh Thermostatic valve with overtemperature protection
FR2716519A1 (en) 1994-02-18 1995-08-25 Vernet Sa Improvement to thermostats with integrated housing.
JP2006329272A (en) 2005-05-24 2006-12-07 Kuzee:Kk Valve device
FR2896319A1 (en) 2006-01-17 2007-07-20 Vernet Sa THERMOSTAT FOR CONTROLLING A FLUID AND METHOD FOR MANUFACTURING SUCH A THERMOSTAT
CN201367940Y (en) * 2009-02-12 2009-12-23 东风富士汤姆森调温器有限公司 External sealed temperature regulating device

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JPH10288037A (en) * 1997-04-11 1998-10-27 Giichi Kuze Wax type thermostat having high cooling efficiency for automobile engine
CN1204792A (en) * 1997-07-09 1999-01-13 日本恒温装置株式会社 Thermostat
JP4262346B2 (en) * 1999-01-27 2009-05-13 本田技研工業株式会社 thermostat

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GB830097A (en) * 1957-02-04 1960-03-09 Dole Valve Co Improvements in or relating to thermostatically controlled valves
DE1245642B (en) * 1964-04-21 1967-07-27 Mecano Bundy Gmbh Thermostatic valve with overtemperature protection
FR2716519A1 (en) 1994-02-18 1995-08-25 Vernet Sa Improvement to thermostats with integrated housing.
JP2006329272A (en) 2005-05-24 2006-12-07 Kuzee:Kk Valve device
FR2896319A1 (en) 2006-01-17 2007-07-20 Vernet Sa THERMOSTAT FOR CONTROLLING A FLUID AND METHOD FOR MANUFACTURING SUCH A THERMOSTAT
CN201367940Y (en) * 2009-02-12 2009-12-23 东风富士汤姆森调温器有限公司 External sealed temperature regulating device

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FR2958002A1 (en) 2011-09-30
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CN102884294B (en) 2014-11-12
CA2806467C (en) 2017-06-27
CN102884294A (en) 2013-01-16

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