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WO2014072398A1 - Mitigeur thermostatique doté d'un piston de séparation de flux et cabine de support de capteur intégrée - Google Patents

Mitigeur thermostatique doté d'un piston de séparation de flux et cabine de support de capteur intégrée Download PDF

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Publication number
WO2014072398A1
WO2014072398A1 PCT/EP2013/073259 EP2013073259W WO2014072398A1 WO 2014072398 A1 WO2014072398 A1 WO 2014072398A1 EP 2013073259 W EP2013073259 W EP 2013073259W WO 2014072398 A1 WO2014072398 A1 WO 2014072398A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
thermostatic
mixer
partitioning piston
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2013/073259
Other languages
English (en)
Inventor
Marco Caleffi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caleffi SpA
Original Assignee
Caleffi SpA
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 Caleffi SpA filed Critical Caleffi SpA
Publication of WO2014072398A1 publication Critical patent/WO2014072398A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

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

Definitions

  • the invention relates to a thermostatic mixer for hot and cold water, suitable for delivering mixed water in a controlled manner, in sanitary plants and for similar applications.
  • a thermostatic mixer in general comprises a valve body having an inlet for the hot water, an inlet for the cold water and an outlet for the mixed water that open to a water mixing chamber in which, a flow-partitioning piston axially slides; the flow- partitioning piston is axially movable between two opposite seats, and is operatively connected to a linear thermostatic actuator that is lapped by the flow of the mixed water.
  • a thrust spring interacts with the thermostatic actuator for adjusting the position of the flow-partitioning piston, in order to maintain the flow of the mixed water at a constant preset temperature.
  • thermostatic mixers examples are disclosed in GB 2329081 and EP 2407849 of the same applicant, and in WO 2010/097545.
  • Mixers of this type generally have a complex internal geometry, comprising a number of items, with consequent manufacturing and assembly costs.
  • the internal geometry of the mixer, the shape and the arrangement of the various components are not always suitable to ensure a high mixing efficiency, in terms of Kv coefficient and good product working.
  • An object of the present invention is to provide a thermostatic mixer for hot and cold water, of the type referred to above, which is suitable for ensuing high performance and functions, with a lower number of internal components and comparatively reduced costs.
  • the target is to define an internal geometry that enables the two flows of hot and of cold water to mix as homogenously as possible, and to have a mixed outlet fluid at a substantially constant average temperature, as the temperatures and flows of entering hot and cold water change.
  • thermostatic mixer according to claim 1 , in which the internal axial geometry of the flux passage and a particular configuration and arrangement of the support cage for the thermostatic actuator, enable a generation of whirling motions of the mixed water lapping the sensitive bulb of the actuator, so as to create ideal operative conditions for the thermostatic actuator and thus for the mixing valve.
  • thermostatic mixer according to the present invention, and the innovative features thereof, will be disclosed in greater detail below with reference to the example of the enclosed drawings, in which:
  • Fig. 1 is a longitudinal section of the mixer
  • Fig. 2 is an enlarged detail of the integrated assembly comprising the flow- partitioning piston and the holding cage for the thermostatic actuator, according to section 2-2 of figure 3;
  • Fig. 3 is a top view of figure 2;
  • Fig. 4 is a bottom view of figure 2;
  • Fig. 5 is a perspective view of the mixer, partially in section, that is suitable for showing the paths of the water flows;
  • Fig. 6 is an enlarged detail of figure 5.
  • the thermostatic mixer 10 comprises a valve body 11 having an inlet 12 for the cold water, an inlet 13 for the hot water, and an outlet 14 for the mixed water oriented orthogonally to the inlets 12 and 13; the inlets 12 and 13 for the cold and hot water open into a chamber in which a flow-partitioning piston slides, substantially consisting of a hollow cylindrical body, which is axially movable between an upper seat 16 and a lower seat 17 that are coaxially arranged to the outlet 14 of the mixed water.
  • a gasket 15 ' housed in a seat of an annular guide 15" for the piston 15, provides the necessary seal between the inlet 12 for the cold water and the inlet 13 for the hot water.
  • the inlet 12 for the cold water indirectly communicates with a mixing chamber 18, through a first annular channel 19 and a flow path inside the flow- partitioning piston 15, whereas the inlet 13 for the hot water directly communicates with the mixing chamber 18 through a second annular channel 20, as shown.
  • the flow-partitioning piston 15 is operatively connected to a linear thermostatic actuator 21 positioned coaxially to the mixing chamber 18, and supported by a cage 22 integral with the piston 15 to form a single unit; a thrust spring 23, positioned coaxially to the cage 22 between the piston 15 and a lower shoulder 24 of the valve body 11, cooperates in contraposition to the thermostatic actuator 21 to move the piston 15 between the two seats 16 and 17 and to regulate the flows of cold and hot water according to a required temperature for the mixed water that laps the sensitive bulb of the thermostatic actuator 21.
  • the spring 23 preferably consists of a tapered spring provided with coils diverging from the flow-partitioning piston 15 towards the outlet 14 of the mixed water; the tapered spring 23, in addition to ensuring a greater flowrate, because it does not obstruct the passages, unlike a cylindrical spring, forces the water flow to lap the walls of the thermostat, giving the thermostat a greater reactivity to the flow of water in the event of dynamic or temperature variations. Further, the flow of cold water tangentially hitting the spring passes from a laminar to a turbulence condition, thus promoting the mixing thereof with the hot water before the entire mixed flow laps the thermostat.
  • the temperature of the mixed water can be regulated by acting on a hollow slider 24, which is screwable in a cap 25, inside which is housed a thrust spring 26 for a sliding element 27 with engages the rod 21 A of the thermostatic actuator 21.
  • a hollow slider 24 which is screwable in a cap 25, inside which is housed a thrust spring 26 for a sliding element 27 with engages the rod 21 A of the thermostatic actuator 21.
  • the flow-partitioning piston 15 substantially consists of a hollow body having a peripheral wall 30 of cylindrical shape, a cross partition 31 and four or more radial partitions 32 that divide the interior of the piston 15 into four or more sectors; at each sector, the internal cross partition 31 is configured with a long arch shaped slit 33 for the passage of the flow of cold water to the mixing chamber 18, as shown in figure 1.
  • the flow-partitioning piston 15 is moulded in plastic material and is integral into a single piece with the holding cage 22 supporting the thermostatic actuator 21.
  • the intermediate partition 31 of the piston 15 has a wide central opening 34, from which the cage 22 extends downwards and towards the outlet 14 for the mixed water.
  • the cage 22 in turn comprises, for example, three or more legs 35 angularly spaced apart, that protrude from the partition 31 of the piston 15, ending in an annular ring or member 36 at the lower end.
  • the thermostatic actuator 21 is thus inserted into the cage 22 through the central hole 34 of the cross partition 31 of the piston 15, and is fastened to the cage 22 against the annular element 36, by an elastic ring 37 disposed between the thermostatic actuator 21 and the partition 31 of the flow-partitioning piston 15.
  • a further feature of the thermostatic mixer 10 consists of providing the cage 22 with a plurality of fins 38 configured and positioned to generate, around the sensitive bulb of the thermostatic actuator 21, whirling motions and a state of turbulence of the mixed water whilst it flows in the mixing chamber 18 towards the outlet 14.
  • a plurality of flow- deviating fins 38 is provided, that are spaced apart from one another, are angularly oriented and shaped for transforming the laminar motion of the flows of hot and cold water into a turbulent motion of the mixed water, around the bulb of the thermostatic actuator 21, creating in this manner ideal operative conditions for the thermostatic actuator that in this manner is lapped by a flow of mixed water having a homogenous average temperature, whilst it flows to the outlet 14.
  • the fins preferably have a rounded profile having length higher at the internal diameter then at the external diameter of the annular member 36; in fact, a minimum lenght of the fins 38 suffices to start the turbulent motion.
  • thermostatic mixer has been provided that is able to achieve the objects indicated.
  • Other modifications and variations can thus be made to the entire mixer or to parts thereof, without departing from the claims.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Multiple-Way Valves (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

L'invention concerne un mitigeur thermostatique (10) pour l'eau chaude et l'eau froide; le mitigeur (10) comprend un piston (15) de séparation de flux et une cabine de support (22), pour un actionneur thermostatique (21) intégrés dans une seule unité. La cabine de support (22) pour l'actionneur thermostatique (21), sur le côté sortie (14) pour l'eau mélangée, est dotée d'une pluralité d'ailettes de déviation de flux (38), conçues et orientées au plan angulaire pour générer des mouvements de tourbillons dans l'eau mélangée, autour de l'actionneur (21), qui améliorent son fonctionnement.
PCT/EP2013/073259 2012-11-08 2013-11-07 Mitigeur thermostatique doté d'un piston de séparation de flux et cabine de support de capteur intégrée Ceased WO2014072398A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2012U000402 2012-11-08
ITMI20120402 ITMI20120402U1 (it) 2012-11-08 2012-11-08 Miscelatore termostatico con pistone partitore di flusso e gabbia portasensore integrati

Publications (1)

Publication Number Publication Date
WO2014072398A1 true WO2014072398A1 (fr) 2014-05-15

Family

ID=48047264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/073259 Ceased WO2014072398A1 (fr) 2012-11-08 2013-11-07 Mitigeur thermostatique doté d'un piston de séparation de flux et cabine de support de capteur intégrée

Country Status (2)

Country Link
IT (1) ITMI20120402U1 (fr)
WO (1) WO2014072398A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9504970B2 (en) 2011-10-22 2016-11-29 Magarl, Llc Methods and apparatus for creating turbulence in a thermostatic mixing valve
CN113646724A (zh) * 2019-03-25 2021-11-12 韦内特公司 恒温阀芯

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2151785A1 (de) * 1970-12-03 1972-06-15 Notte Pier Vincenzo Thermostatventil,insbesondere fuer Kuehlkreise von endothermen Motoren
EP1751641B1 (fr) * 2004-05-18 2008-12-03 Vernet S.A. Cartouche thermostatique de regulation de fluides chaud et froid a melanger, ainsi que robinet mitigeur muni d'une telle cartouche
EP2407849A1 (fr) * 2010-07-15 2012-01-18 Caleffi S.p.A. Mitigeur thermostatique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2151785A1 (de) * 1970-12-03 1972-06-15 Notte Pier Vincenzo Thermostatventil,insbesondere fuer Kuehlkreise von endothermen Motoren
EP1751641B1 (fr) * 2004-05-18 2008-12-03 Vernet S.A. Cartouche thermostatique de regulation de fluides chaud et froid a melanger, ainsi que robinet mitigeur muni d'une telle cartouche
EP2407849A1 (fr) * 2010-07-15 2012-01-18 Caleffi S.p.A. Mitigeur thermostatique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9504970B2 (en) 2011-10-22 2016-11-29 Magarl, Llc Methods and apparatus for creating turbulence in a thermostatic mixing valve
US10376849B2 (en) 2011-10-22 2019-08-13 Magarl, Llc Methods and apparatus for creating turbulence in a thermostatic mixing valve
CN113646724A (zh) * 2019-03-25 2021-11-12 韦内特公司 恒温阀芯

Also Published As

Publication number Publication date
ITMI20120402U1 (it) 2014-05-09

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