EP0447851A2 - Vanne à trois voies - Google Patents

Vanne à trois voies Download PDF

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Publication number
EP0447851A2
EP0447851A2 EP91102985A EP91102985A EP0447851A2 EP 0447851 A2 EP0447851 A2 EP 0447851A2 EP 91102985 A EP91102985 A EP 91102985A EP 91102985 A EP91102985 A EP 91102985A EP 0447851 A2 EP0447851 A2 EP 0447851A2
Authority
EP
European Patent Office
Prior art keywords
valve
lower portion
stem
chamber
passage
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.)
Withdrawn
Application number
EP91102985A
Other languages
German (de)
English (en)
Other versions
EP0447851A3 (en
Inventor
Giuseppe Fugazza
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.)
FUGAS Srl
Original Assignee
FUGAS Srl
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 FUGAS Srl filed Critical FUGAS Srl
Publication of EP0447851A2 publication Critical patent/EP0447851A2/fr
Publication of EP0447851A3 publication Critical patent/EP0447851A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water

Definitions

  • the present invention concerns a three-way valve of the type to be used together with boilers that are adapted to supply both heating hot water and instant domestic hot water in a residential system or plant.
  • the known valves of this kind are either of the direct-control type, e.g. operated by a small electric motor, or operated by a hydraulic valve, and suffer the inconveniences of possible leakages due to wear of the seal rubber rings (O rings) in the piping circuitry of the heating water.
  • O rings seal rubber rings
  • the object of the present invention is that of overcoming the above mentioned shortcomings and drawbacks, by means of a compact direct-control valve, easy to be mounted due to its peculiar design, ad reliable thanks to the lack of sealing members in the heating hot water piping circuitry.
  • a three-way valve for use with boilers adapted to supply both heating hot water and domestic hot water, characterized in that such valve comprises an upper portion and a lower portion, said upper portion comprising an output duct in communication with a heat exchanger, and an axially movable stem carrying at one of its ends a double plug and at the other end an assembly made up by a rigid dividing wall and a flexible diaphragm, with a helical spring axially acting on said stem; said lower portion comprising a chamber in communication with two output ducts and within which the double plug is movable; and in that said two portions are fitted together by means of a threaded section and sealing members, so as to allow for their relative rotation.
  • valve according to the invention provided with output ducts 2, 3 and 4, is illustrated as incorporated in a heating plant comprising a pump 10, a gas/water heat exchanger component generally designate at R, a generic heat distribution unit or radiator RD and pipes A, B, C, D.
  • Fig. 1 further shows a heat exchanger 11 used to heat the domestic hot water flowing through a coil 12 and the associated plant, schematically indicated by pipe sections S1 and S2; for an easier illustration, the other components of the boiler have not been shown, the boiler being in general of the type burning either a fluid fuel such as for example gas or gas oil, or a solid fuel.
  • a fluid fuel such as for example gas or gas oil, or a solid fuel.
  • the valve according to the invention comprises an upper portion 20 mounted on a lower portion 30 and capable to be rotated up to 360° with respect to the former.
  • the two portions are joined together by a coupling sleeve 40 having a lower threaded section 33 which engages a complementary female threaded section formed in the upper part of the lower portion 30, the sleeve being upwardly bound to the upper portion 20 only along the axial direction through a blocking Seeger ring 34, whereas the sealing is ensured by two O rings 35A and 35B.
  • This results in the two portions being completely rotatable in respect of each other, thus allowing for positioning the conduits and the outer members in the best way for an easy assembling of the plant.
  • the upper portion 20 is provided with an outlet duct 4 communicating with the heat exchanger 11, and comprises a valve body within which a stem 16 is axially movable, the stem carrying at one end (inside the valve lower portion 30) a double plug 17. At its other end the stem carries an assembly comprising a rigid dividing wall 7 and a flexible diaphragm 6 axially movable with respect to the rigid wall, with a helical spring 19 partially housed in a recess 39 urging the stem downward.
  • the lower portion 30 comprises a chamber 13 communicating with the two output ducts 2 and 3, and within which the double plug 17 is movable between a lower position in which it closes the output duct 2 of the valve, and an upper position in which it closes a narrow annular passage 27 communicating the two valve portions 20 and 30.
  • the rigid dividing wall 7 and flexible diaphragm 6 assembly divides the inside of the valve into two spaces or chambers, 23 and 24 respectively, and a variable volume interstitial space is defined between the dividing wall and the diaphragm.
  • the chamber 24 communicates with the output 4 of the upper body, with the valve lower portion 30 and through a narrow passage 25 with the upper chamber 23.
  • a channel 15 further communicates the chamber 13 of the valve lower body with the interstitial space 6-7 through the passage 5 and, through a passage 36 controlled by a piston 31 of an auxiliary valve 32, with the upper chamber 23 of the upper body.
  • the auxiliary valve 32 is for example a small power solenoid valve, either of the D.C. or A.C. type.
  • a D.C. valve eliminates any hum.
  • a small hydraulic valve actuated by the domestic hot water draw can be used. Therefore, according to the invention, in order to determine the supplied flow rate of domestic hot water, there is used an ON/OFF valve in lieu of a three-way valve equipped with a small exhaust tube.
  • the heating hot water is admitted into the chamber 13 of the valve 1 from the duct 3 and returns to the pump 10.
  • the pressure within the valve chamber 13 is transmitted through the channel 15 and the passage 5 to the insterstitial space 18 formed between the flexible diaphragm 6 and the rigid dividing wall 7.
  • the pressure is lower than the above mentioned pressure due to the pressure-drop through the passage 27.
  • the so formed pressure differential causes the swelling of the flexible diaphragm 6 which overcome the force of the spring 19 and lift the stem 16 with the attached plug 17.
  • the cross section of passage 36 has to be considerably larger than that of passage 25. It has been found that for the proper operation of the valve according to the invention, the ratio between the cross section areas of passages 25 and 36 is comprised between 3.5 and 6, and preferably between 4 and 5. In a preferred embodiment it has been found as optimum a ratio value of about 4, with cross section areas of about 5 mm2 and about 1.2 mm2 for the passages 36 and 25, respectively, both having a circular shape. Anyhow, the head or pressure difference for the proper operation of the valve is in the order of 30-40 cm. Moreover the diameter of passage 25, or in case the maximum transverse dimension thereof, is preferably comprised between 0.5 and 1.5 mm, which allows for eliminating the effects due to the water hammering when switching from one operating condition to the other.
  • the auxiliary valve 32 When domestic hot water is drawn from the water supply system, e.g. by opening one of the taps (not shown) of the plant S1-S2, the auxiliary valve 32 is energized.
  • the energization of the valve 32 causes the passage 15 to be communicated with the chamber 23, thus rendering substantially equal the two pressures acting over the walls of the flexible diaphragm 6 (a slight difference is due to the presence of the small exhaust passage 25), so that the spring 19 extends and the plug 17 closes the communication toward the duct 4 (see Fig. 4). Under these conditions there is established the path D, 3 and 4 allowing for the return of the heating hot water to the pump by flowing through the heat exchanger 11 and thus heating the water in the domestic supply circuit.
  • Fig. 5 The outer appearance of the valve according to the invention as above described is shown in Fig. 5, in which it is further shown a threaded duct section 58 for the fitting of a control gauge.
  • a device combining both the flow control and the automatic bypass functions.
  • a flow control device also called flow valve
  • flow valve is used to stop the system operation in case of lack of water in the plant, to prevent damages thereto.
  • a bypass device that of returning to the delivery duct of the pump a certain amount of water bypassing the main plant (through the dashed pipe 43 of Fig. 1) when the heating plant causes an excessive pressure-drop for the pump capability, e.g. due to a wrong sizing thereof.
  • a part of the water goes to the heating and the remaining part to the boiler, thus preventing noisiness in the water/gas exchanger R.
  • the flow control device (or flow valve) is of a known type and is housed in the valve lower portion 30, and comprises a flexible diaphragm 44, preferably with a circular shape, positioned between the chamber 13 of the lower portion 30 and a duct section 57 which in coupled to the pipe 43 (not shown). More particularly, the flexible diaphragm 44 is clamped along its periphery between the body of the lower portion 30 and the edge of an enveloping structure or bell 45 in which it is formed also the outlet duct 57.
  • This structure 45 formed for example of plastic material, is further provided with an opening for a stem 52 the outer end of which is adapted for opening or closing a microswitch 38 (shown with dashed line in Fig. 2) that blocks or enables the plant's operation.
  • the flexible diaphragm 44 is further positioned between a shoulder 53 of the lower portion 30 and the edge of a second inner bell-shaped structure 47.
  • Such second structure is provided with an opening for a stem 50 with a coaxial helical spring 49.
  • the stem 50 is aligned and adapted to act on the stem 52 that actuates the microswitch 38.
  • a calibrated spring 54 is interposed between these two structures 45 and 47 that is coaxial with both stems and has a greater strenght than that of the spring 49.
  • the end of the stem 50 near the flexible diaphragm 44 carries a pan 48 on which the flexible diaphragm acts.
  • This latter is further provided with a plurality of openings or peripheral holes 56 formed in an annular crown defined by the permanently clamped periphery (between 30 and 45 in Fig.5) and the annular portion between the shoulder or projection 53 and the edge of the structure 47.
  • the working of the device is as follows.
  • the flexible diaphragm 44 is no longer able to overcome the bias of the spring 49, and the stem 50 through the hole in the bell-shaped structure 47 pushes the stem 52 and closes the microswitch 38, thus blocking the plant.
  • the bell-shaped structure 47 is kept against the flexible diaphragm by the spring 54.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Water Treatment By Sorption (AREA)
EP19910102985 1990-03-08 1991-02-28 An improved three-way valve Withdrawn EP0447851A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19615A IT1240930B (it) 1990-03-08 1990-03-08 Valvola a tre vie perfezionata
IT1961590 1990-03-08

Publications (2)

Publication Number Publication Date
EP0447851A2 true EP0447851A2 (fr) 1991-09-25
EP0447851A3 EP0447851A3 (en) 1992-05-13

Family

ID=11159642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910102985 Withdrawn EP0447851A3 (en) 1990-03-08 1991-02-28 An improved three-way valve

Country Status (2)

Country Link
EP (1) EP0447851A3 (fr)
IT (1) IT1240930B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791772A2 (fr) * 1996-02-22 1997-08-27 WILO GmbH Soupape à trois voies pour jonction hydraulique
EP0945687A1 (fr) * 1998-03-24 1999-09-29 Michele Rossignoli Vanne de dérivation actionnée par pression
EP0987499A3 (fr) * 1998-09-18 2002-07-17 Fontecal S.p.A. Soupape de déviation et de dérivation
GB2388888B (en) * 2002-05-23 2005-11-02 4C Group Ltd Adjustable diaphragm housing for an hydraulic diverter valve
EP3428546A1 (fr) 2017-06-16 2019-01-16 Vaillant GmbH Soupape de dérivation réglable électroniquement intégrée dans une soupape à trois voies commandée électroniquement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1151494A (en) * 1966-01-25 1969-05-07 Horne Engineering Company Ltd Thermally-Responsive Fluid-Control Valves
US3582229A (en) * 1968-09-03 1971-06-01 Troesch Hans A Circulating pump for hot water heating system
GB1423119A (en) * 1973-06-08 1976-01-28 Rydbergs Valve
DE2847804A1 (de) * 1978-07-24 1980-02-07 Sabco Ltd Vorrichtung zur steuerung eines fliessfaehigen mediums, beispielsweise wasser
US4615353A (en) * 1984-01-24 1986-10-07 Mckee James E Pneumatic control valves with diaphragm actuators and modular body structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1151494A (en) * 1966-01-25 1969-05-07 Horne Engineering Company Ltd Thermally-Responsive Fluid-Control Valves
US3582229A (en) * 1968-09-03 1971-06-01 Troesch Hans A Circulating pump for hot water heating system
GB1423119A (en) * 1973-06-08 1976-01-28 Rydbergs Valve
DE2847804A1 (de) * 1978-07-24 1980-02-07 Sabco Ltd Vorrichtung zur steuerung eines fliessfaehigen mediums, beispielsweise wasser
US4615353A (en) * 1984-01-24 1986-10-07 Mckee James E Pneumatic control valves with diaphragm actuators and modular body structure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791772A2 (fr) * 1996-02-22 1997-08-27 WILO GmbH Soupape à trois voies pour jonction hydraulique
EP0791772A3 (fr) * 1996-02-22 1998-03-11 WILO GmbH Soupape à trois voies pour jonction hydraulique
EP0945687A1 (fr) * 1998-03-24 1999-09-29 Michele Rossignoli Vanne de dérivation actionnée par pression
EP0987499A3 (fr) * 1998-09-18 2002-07-17 Fontecal S.p.A. Soupape de déviation et de dérivation
GB2388888B (en) * 2002-05-23 2005-11-02 4C Group Ltd Adjustable diaphragm housing for an hydraulic diverter valve
EP3428546A1 (fr) 2017-06-16 2019-01-16 Vaillant GmbH Soupape de dérivation réglable électroniquement intégrée dans une soupape à trois voies commandée électroniquement

Also Published As

Publication number Publication date
IT9019615A0 (it) 1990-03-08
EP0447851A3 (en) 1992-05-13
IT9019615A1 (it) 1991-09-08
IT1240930B (it) 1993-12-27

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