WO2002050460A1 - Valve hydraulique a commande electrique, en particulier pour chauffe-eau - Google Patents

Valve hydraulique a commande electrique, en particulier pour chauffe-eau Download PDF

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Publication number
WO2002050460A1
WO2002050460A1 PCT/IB2001/002278 IB0102278W WO0250460A1 WO 2002050460 A1 WO2002050460 A1 WO 2002050460A1 IB 0102278 W IB0102278 W IB 0102278W WO 0250460 A1 WO0250460 A1 WO 0250460A1
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WO
WIPO (PCT)
Prior art keywords
fact
sma2
valve according
smal
previous
Prior art date
Application number
PCT/IB2001/002278
Other languages
English (en)
Inventor
Ruggero Marchetti
Original Assignee
Merloni Termosanitari S.P.A.
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 Merloni Termosanitari S.P.A. filed Critical Merloni Termosanitari S.P.A.
Priority to AU2002223969A priority Critical patent/AU2002223969A1/en
Publication of WO2002050460A1 publication Critical patent/WO2002050460A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/025—Actuating devices; Operating means; Releasing devices electric; magnetic actuated by thermo-electric means
    • 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

  • This invention relates to an electrically controlled hydraulic valve developed in particular for hot water heaters.
  • valves of the aforementioned kind depends on a plug operated by an electric actuator such as a motor and a solenoid.
  • Valves of this kind are usually either two-way or three-way and are widely used in hydraulic systems and heaters.
  • some types of heaters for domestic heating that provide also for the instantaneous production of the sanitary hot water (i.e. without a storage tank as in the case of boilers) use a three-way valve for this purpose; the way these heaters and systems are built and function is well known to all, so just a brief description is provided here.
  • a three-way valve diverts in whole or in part the water of the main heating circuit to a dedicated exchanger responsible for the heating of the sanitary water and hence cuts off meanwhile the domestic heating circuit in whole or in part.
  • the three-way valve returns to the starting position so that the water can circulate once again only in the domestic heating system.
  • the three-way valve that diverts the flow towards the sanitary water exchanger or towards the domestic heating circuit can have either two inlets and an outlet or two outlets and one inlet; in the first case, this valve is located downstream of a sanitary water exchanger, while in the second case it is located upstream of the exchanger.
  • valves with two inlets and one outlet are preferred because they cause less head losses:
  • three-way valves can be divided in: mixer valves, where the plug can assume several different intermediate positions between the two end stops; in this case the actuating of the plug is carried out by means of an electric motor and in particular a stepper motor; deflector valves, i.e. with an ON-OFF function, where the valve plug can assume only two alternative end-stop positions and can be easily actuated by a solenoid.
  • valves of the aforementioned type have a series of practical and functional drawbacks resulting mainly from the type of actuator used to move the plug.
  • a first drawback is that the electric motors used in the valves are quite bulky and this it turn explains the large overall dimensions of the valve; another problem regards the cost of the electric motor and the relevant control circuits which determine the overall costs of the valve and the need to reduce said costs.
  • both the traditional and stepper electric motors used in known valve models may cause problems of reliability in the course of time and are marked by a certain degree of noisiness during operation.
  • Another substantial problem is that posed by the fact that the response or operate time of the valves equipped with motors is relatively long.
  • SMA actuators are well known and do not require here a detailed description; suffice it to- schematically point out here that for the purpose of the construction of these actuators the material used is deformed plastically during special heat treatments; the result is that an SMA wire, for instance, assumes different lengths depending on whether it is kept below or above given temperatures and maintains said characteristic in the course of time.
  • an SMA wire has a martensitic crystalline structure with a specific volume and hence a specific length; at high temperatures (for instance, 50-100°C), the SMA wire assumes an austenitic crystalline structure smaller than the previous one in terms of volume and hence also of length.
  • US-A-4,973,024 speaks of a two-way valve equipped with a linearly mobile plug operated by an SMA wire in opposition to the action of a spring.
  • the two ends of the SMA wire are bound to the valve body and the plug respectively, where the spring on the one hand provides for keeping the wire tense and, on the other, to make the plug close one path for the passage of the liquid.
  • the electric heating of the SMA wire leads to the shrinking of the length of the wire and hence to the traction of the plug in contrast to the spring's action; the plug can hence assume a position enabling the passage of the liquid.
  • US-A-5,345,963 which describes a discharge valve equipped with a linearly mobile plug operated by an SMA wire in contrast with the action of a spring.
  • the ends of the SMA wire are bound to the valve body so that one end of the stem rests on the central part of the valve body while the other end is connected to a plug; in this case a spring pushes the stem upwards on the SMA wire.
  • the electric heating of the SMA wire leads to the shrinking of the wire and hence pushes the stem downwards so that it can overcome the resistance of the spring and the plug can pass from a first to a second operating position.
  • the plug is hooked instead to the center of the SMA wire which in this case too is fastened at both ends to the valve body; in other words, the SMA wire supports the plug which is pushed by downward by a spring.
  • the electric heating of the SMA wire leads to the shrinking of the length of the wire and hence to the upward movement of the plug so that it can overcome the spring's resistance and the plug can then pass from a first to a second operating position.
  • this invention regards the construction of an electrically-controlled hydraulic valve marking a substantial improvement compared to the state of the art and, in particular, a valve of the said kind with compact dimensions, low costs, a simple structure, great reliability in the course of time, silent operating and a prompt response time.
  • FIG. 1 schematically shows the section of the valve obtained in compliance with the specifications of this invention during a first operating status
  • - Fig. 2 schematically shows the section of the valve obtained in compliance with the specifications of this invention during a second operating status
  • - Fig. 3 schematically shows an example of the application of the valve as envisaged by the invention, i.e. mounted on a hot water heater.
  • valve 1 is a three-way valve to be used together with a hot water heater.
  • Valve 1 has a body formed by a tube-shaped component indicated with 2 and hereinafter after called sleeve and by a second tube-shaped component 3 with two inlets indicated with 4 and 5 and an outlet indicated with 6.
  • Components 2 and 3 can be made, for example, in metal or thermoplastic material and are sealed together by inserting partially the former into the latter; for this reason sleeve 2 is equipped with a seat for the mounting of an appropriate seal 7 which can be an o-ring for instance.
  • a spindle made, for instance, in stainless steel and with two portions whose sections differ in terms of their dimensions; as it can easily be seen, the smaller portion is inserted in a slot in the low end of sleeve 2; one or more seals 8A are envisaged around this slot to provide for the axial hydraulic sealing of spindle 8.
  • a plug 9 with a customary design; the plug 9 is equipped with suitable seal components (9A and 9B), for example, shaped like o-ring seals and to be used alternatively on a first water passage way indicated with VI in Fig. 1 and on a second water passage way indicated in Fig. 2 with V2.
  • the seats for the seal rings 9A and 9B are preferably provided with a ring-shaped relief along to the two contact surfaces to reduce the bearing strength on these rings and to improve the hydraulic seal.
  • the larger sized portion of the spindle 8 is hence always housed inside sleeve 2 and at its upper end a slide indicated in the figure with 10 is fastened to it.
  • a tube-shaped transmission component hereinafter called the carriage hereinafter called the carriage; the carriage 11 is inserted through the axial slot on the portion of the spindle 8 housed in sleeve 2.
  • SMAl indicates a first SMA wire, one end of which is fastened to the upper part of carriage 11; the other end of the wire SMAl is fastened instead to sleeve 3 in an area adjacent to that in which the axial passage of the spindle 8 is located.
  • SMA2 indicates a second SMA wire which is fastened at one end to the lower part of carriage 11 ; the other end of wire SMA2 is fastened instead to slide 10.
  • the group composed of wires SMAl and SMA2 and carriage 11 is fastened on one side to sleeve 2 and on the other to the unit formed by slide 10 and spindle 8 and carriage 11 plays the role of a transmission component to which wires SMAl and SMA2 are connected mechanically in series, that is to say in a way that makes the actuation of one wire affect also the actuation of the other.
  • the diameter of the SMAl and SMA2 wires is approx. 0.5 mm. This size was duly chosen on the basis of the required actuation time and of the loads involved.
  • the length of the SMAl and SMA2 wires can amount to 65 mm, which is tantamount to a stroke of 4.5 mm for plug 9 and an elongation of 3.5%.
  • valve 1 is indicated an appendix of slide 10 which, by means of a relevant passage in sleeve 2, protrudes from the latter; 14 indicates a micro-switch which is normally closed: it is connected on the outside of sleeve 2 and aligned with appendix 10 A and slightly shifted to the bottom of latter; as it can be seen in the example of the invention provided herein, micro- switch 14 is located on the circuit powering wires SMAl and SMA2 for the purposes specified below
  • Valve 1 is also equipped with devices for the supply of electricity to wires SMAl and SMA2; these devices are not shown in the figures for the sake of simplicity. Their purpose is to heat the wires by Joule effect.
  • Sleeve 2 has special slots or passages indicated with 2 A in the figures so as to provide for the subsequent cooling of the wires by means of the ventilation provided by the ambient air.
  • the functioning of valve 1 as envisaged by the invention is as follows.
  • the switching of valve 1 is obtained by energizing wires SMAl and SMA2; the wires, heated by Joule effect, reach the temperature at which they change into austenite and hence shrink back to the original length.
  • the shrinking of wire SMAl pulls down carriage 11 and hence also the slide 10 - spindle 8 group which is fastened to the carriage by means of wire SMA2; on the other hand, the simultaneous shrinking of wire SMA2 pulls the slide 10 - spindle 8 group further down and hence moves plug 9; in other words, wire SMA2 adds its effect to that of wire SMAl so that the movement of plug 9 produced by the action of wire SMAl is amplified by the action of wire SMA2.
  • micro-switch 14 which is inserted in series on the circuit powering wires SMAl and SMA2.
  • the downward movement of slide 10 obtained as described above determines also the lowering of appendix 10 A, which activates a feeler on micro-switch 14 thus causing the switching of the latter.
  • the opening of the circuit powering wires SMAl and SMA2 determines the interruption of the electricity and the consequent partial and gradual cooling of the wires which allows the valve to return to the status illustrated in Fig. 1.
  • wires SMAl and SMA2 start to cool down thanks to the circulation of air generated by the openings 2A in sleeve 2; the wires then tend to return to the martensitic condition and hence to increase in length with the consequent return of slide 10 to the position indicated in Fig. 1.
  • appendix 10A is lifted off the feeler of micro-switch 14, which closes and leads to reenergizing and hence the heating of wires SMAl and SMA2.
  • valve 1 needs to be kept in the status shown in Fig. 2; then the power supply to wires SMAl and SMA2 is cut off upstream of micro-switch 14; by doing so, valve 1 returns to the status shown in Fig. 1 thanks to the cooling and hence the stretching of wires SMAl and SMA2 and of the action of spring 12.
  • wires SMAl and SMA2 are energized to value maintained between 2 and 2.5 A; as pointed out above, the control of the position and hence of the current during actuation is provided for by micro-switch 14 which, once the relevant position is reached, opens and closes alternatingly the circuit thus keeping the power supply under control.
  • micro-switch 14 must not be considered as absolutely necessary for the implementation of the invention; however, its use is advantageous on the one hand because it avoids a useless waste of current and, on the other, because it determines a precise end stop thus avoiding excessive strain on plug 9.
  • wires SMAl and SMA2 Since the electrical load constituted by wires SMAl and SMA2 is purely resistive in nature, e.g. equal to approx. 1 ⁇ , and in order to operate valve 1 with a constant direct current voltage, the latter can be powered constantly at 2 ⁇ 2.5 V; this is an easy way to operator the diverter valve, i.e. with an ON-OFF type function. With regard to the example of implementation in question, wires SMAl and SMA2 can also have different lengths and be energized separately to obtain a choke valve. It must also be noted that the heating of wires SMAl and SMA2 induced by Joule effect can also be obtained by varying the supplied current.
  • valve 1 can be equipped with a sensor of a known type (for instance, Reed type or Hall effect type, etc.) for the detection of the position of one of the mobile components (spindle 8, plug 9, slide 10, carriage 11), and of a specific circuit, it too of a known type, for the modulation of the supplied current in order to keep the plug in any preset position.
  • a sensor of a known type for instance, Reed type or Hall effect type, etc.
  • the position sensors and the electric current regulators of a known type are sensitive enough to keep the plug in any intermediate position with oscillations of just a few hundredths of a millimeter by modulating constantly the supplied current and hence the wire temperature.
  • valve 1 according to the invention is of the mixer type and provides for the constant modulation of the plug condition.
  • the sensor device whose signal controls the position of the plug can be any external sensor.
  • the presence of a sensor measuring the temperature of the mixed outflowing water gives a thermostatic mixer valve. To this end all that needs to be done is make sure that the SMAl and SMA2 wires can cool down each time they need to be stretched out with the same speed at which they are heated and shrink when electricity is running through them.
  • Fig. 3 schematically illustrates by way of example a type of application of valve 1 as described above.
  • 21 indicates a heater taken as a whole, which is equipped with a first heating device 22 with a known design and commonly called "flue gas heat exchanger"; flue gas heat exchanger 22 is envisaged for the heating of the water in a heating circuit indicated with 23 and is represented in the figure with a broken line. It supplies the various radiators located in the household, two of these are indicated with 24. With 25 is indicated a pump to make the water heated by flue gas heat exchanger 22 circulate through the system 23
  • sanitary water exchanger a second heat exchanger herein called "sanitary water exchanger". It is used to heat at request the water in a sanitary water system indicated in the figure with 27 and represented with a darker line.
  • Heater 21 is equipped with a valve 1 built according to the plan illustrated in figures 1 and 2, whose inlet 4 is connected to the branch of the heating system 23 coming from the radiators 24, inlet 5 is connected to the outlet of the sanitary water exchanger 26, while outlet 6 is connected to the suction branch of pump 25 or, more in general, to the branch of the heating system 23 located upstream of heat exchanger 26.
  • valve 1 In normal conditions, that is to say in the absence of a request for hot sanitary water, valve 1 provides for the circulation of the water only in heating circuit 23, which supplies the radiators 24; in this situation valve 1 is in the status illustrated in Fig. 1, i.e. with inlet 5 closed by plug 9 and hence the water cannot circulate in heat exchanger 26 owing to the closure of inlet 5 of valve 1. In case the user requests instead hot sanitary water, valve 1 passes to the position illustrated in Fig. 2 according to the procedure described above.
  • valve 1 The switching of valve 1 is activated as usual following the opening of a hot sanitary water faucet 30 by the user, to this end heater 1 is equipped with a flow or volume sensor indicated with 28 and suitable to detect a request of hot water by the system 27.
  • sensor 28 detects a request for hot water by the system 27, the valve passes as illustrated above to the status described in Fig. 2 by closing inlet 4 and opening inlet 5.
  • the hot water in the heating circuit 23 heated by flue gas heat exchanger 22 is diverted to the sanitary water exchanger 26; once in the exchanger, cold water from the domestic water pipeline flows in following the opening of faucet 30. Therefore, inside device 26 a thermal exchange is obtained according to a known technique. In the course of the exchange the heat of the water from system 23 is conveyed to the sanitary water arriving from system 27. In this way, the sanitary water 27 is heated inside the heat exchanger 26 so that it reaches faucet 30 with the right temperature.
  • sensor 28 commands a new commutation of valve 1 which returns to the original position illustrated in Fig. 1 according to the procedure described above; the water thus starts to flow again in circuit 23 to be heated by flue gas heat exchanger 22 and sent to radiators 24 instead of to the sanitary water exchanger 26.
  • valve 1 i.e. the passage from the position of Fig. 1 to Fig. 2
  • the release time i.e. the time necessary for the valve to return to the condition of Fig. 1
  • the duration of these processes is perfectly compatible with the application described in Fig. 3.
  • the switching of valve 1 from the position of Fig. 1 to that of Fig. 2 occurs in the least possible time following the detection of a request for hot water by the sanitary water system.
  • valve 1 as illustrated in the example in Fig. 3 must not necessarily be of the ON/OFF type, but it can be of the mixer type to provide for the passage of the water of a part of the flow of water circulating in system 23 in sanitary water exchanger 26.
  • valve has low costs, its simple structure, the promptness of its operation, its silent functioning and high reliability in the course of time.
  • many variants are possible for people working in the field compared to that illustrated in the example, without however transcending the novelty inherent in the idea inspiring in the invention.
  • the various elements described herein can have different shapes, be made of different materials and be replaced by technically equivalent elements.
  • valve 1 is of the three-way type.
  • the idea behind this invention is perfectly applicable also for the construction of a two-way valve; in the light of as much and considering that the plug can be controlled as described above to obtain one or more intermediate work positions between the two end stops, the invention can be applied also for the construction of choke valves to regulate flow of a liquid.
  • the valve as per the invention must not necessarily be of the two-inlet and one- outlet type, since it can also be of the one inlet and two-outlet type. For example, with regard to the example in Fig.
  • a valve 1 with two outlets and one inlet can be used to divert directly the water exiting flue gas heat exchanger 22 and heading towards sanitary water exchanger 26; in this way, the inlet of this valve can be connected to the outgoing branch of flue gas heat exchanger 22, the valve's first outlet can be connected to the incoming branch of heat exchanger 26 and the valve's second outlet can be connected to system 23 supplying radiators 24
  • the first outlet is closed by the valve's plug, thus preventing the passage of the water of heating system 23 to heat exchanger 26; in case of a request for hot water after the opening of faucet 30 the second outlet is closed to divert the water from system 23 to heat exchanger 26.
  • valve 1 can be devised in such a way that the energizing or heating of wires SMAl and SMA2 occur separately so that the energizing of only one of the wires can move plug 9 only a fraction of the maximum permissible movement. From this point of view, the SMA wires can even have different lengths so that the possible plug movements are proportional to the respective lengths of the wires.
  • the plug movement will amount to a third of the maximum permissible movement; by heating only the second wire, the plug movement will amount instead to two thirds of the maximum permissible movement; finally, by heating both wires, the plug movement will be the maximum permissible movement.
  • SMA wires to be connected in series can be more than 2, although this clearly makes the mechanism for the actuation of the valve more complicated; among other things, another possibility is that of heating only a part of each SMA wire, for instance, by mounting an electric bypass wire attached to the middle of the SMA wire in the relevant power supply circuit.
  • SMAl and SMA2 wires be coated with a silicon sheath to favor the cooling; in this case the sheath can be duly shaped to favor the cooling of the wires
  • the structure of the cooling slots 2 A can vary from that described in the example to reduce the time needed for the cooling of wires SMAl and SMA2 and hence adapt it to the heating time. Tn this case, it must be pointed out that valve 1 can be placed with profit near or on the openings of heater 21, through which the latter receives the air necessary for its functioning.
  • the rapid cooling of the SMA wires used in the valve as per the invention can be obtained also by means of a forced cooling system.
  • the spindle 8 can be connected mechanically to plug 9 by means of an elastic component like a spring to absorb any contractions in excess compared to the plug's maximum permissible movement.
  • Valve 1 as described herein refers specifically to the use of SMA wires.
  • the valve's actuator devices made of shape memory alloys as per the invention can have a length, shape and width other than that illustrated in the example. For instance, it can have the shape of a foil or ribbon, without prejudice to the principles of the inventions.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Temperature-Responsive Valves (AREA)
  • Magnetically Actuated Valves (AREA)
  • Multiple-Way Valves (AREA)

Abstract

L'invention concerne une valve à commande électrique, en particulier pour chauffe-eau, selon la structure type suivante: corps (2,3) présentant au moins une entrée (4,5) et une sortie (6), et au moins un passage (V1, V2) entre l'entrée (4,5) et la sortie (6); bouchon (9) ouvrant et fermant le passage (V1, V2); actionneurs (SMA1, SMA2) assurant le mouvement du bouchon (9) par le biais d'un mécanisme d'activation (8,10,11,12). Les actionneurs (SMA1, SMA2) comprennent un premier élément de forme allongée et/ou étroite en alliage à mémoire de forme (SMA1). Les actionneurs (SMA1, SMA2) comprennent en outre au moins un second élément de forme allongée et/ou étroite en alliage à mémoire de forme (SMA2), relié mécaniquement en série au premier élément (SMA1).
PCT/IB2001/002278 2000-12-20 2001-11-30 Valve hydraulique a commande electrique, en particulier pour chauffe-eau WO2002050460A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002223969A AU2002223969A1 (en) 2000-12-20 2001-11-30 Electrically controlled hydraulic valve, in particular for hot water heaters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2000A001182 2000-12-20
IT2000TO001182A IT1321117B1 (it) 2000-12-20 2000-12-20 Valvola idraulica controllata elettricamente, in particolare percaldaie con produzione di acqua calda.

Publications (1)

Publication Number Publication Date
WO2002050460A1 true WO2002050460A1 (fr) 2002-06-27

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PCT/IB2001/002278 WO2002050460A1 (fr) 2000-12-20 2001-11-30 Valve hydraulique a commande electrique, en particulier pour chauffe-eau

Country Status (3)

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AU (1) AU2002223969A1 (fr)
IT (1) IT1321117B1 (fr)
WO (1) WO2002050460A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007032041A1 (fr) * 2005-09-12 2007-03-22 Aero Sekur S.P.A. Valve amelioree pour recipient, de preference un cylindre contenant un gaz haute pression
WO2014076051A1 (fr) * 2012-11-19 2014-05-22 Otto Egelhof Gmbh & Co. Kg Vanne d'arrêt pour fluides liquides et gazeux
DE102014105100A1 (de) * 2014-04-10 2015-10-15 Otto Egelhof Gmbh & Co. Kg Ventil, insbesondere Regel- oder Abschaltventil, für flüssige oder gasförmige Medien
CN113757779A (zh) * 2021-08-03 2021-12-07 毛训峰 一种供暖管道隔热用保温套

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108022A1 (de) * 2021-03-30 2022-10-06 Grohe Ag Zweiwegeventil für eine Sanitärarmatur und Sanitärarmatur mit einem solchen Zweiwegeventil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272195A2 (fr) * 1986-12-17 1988-06-22 Carrier Corporation Système de commande dans un diffuseur pour chauffer/refroidir
US4973024A (en) * 1989-09-26 1990-11-27 Toki Corporation Kabushiki Kaisha Valve driven by shape memory alloy
EP0841510A1 (fr) * 1996-11-08 1998-05-13 Matsushita Electric Works, Ltd. Soupape de réglage du débit
WO1999022124A1 (fr) * 1997-10-28 1999-05-06 Victor Yakovlevich Ananichuk Thermostat pour le systeme de refroidissement d'un moteur a combustion interne
EP0959282A2 (fr) * 1998-05-20 1999-11-24 BSH Bosch und Siemens Hausgeräte GmbH Soupape pour la commande du milieu gazeux et liquide

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272195A2 (fr) * 1986-12-17 1988-06-22 Carrier Corporation Système de commande dans un diffuseur pour chauffer/refroidir
US4973024A (en) * 1989-09-26 1990-11-27 Toki Corporation Kabushiki Kaisha Valve driven by shape memory alloy
EP0841510A1 (fr) * 1996-11-08 1998-05-13 Matsushita Electric Works, Ltd. Soupape de réglage du débit
WO1999022124A1 (fr) * 1997-10-28 1999-05-06 Victor Yakovlevich Ananichuk Thermostat pour le systeme de refroidissement d'un moteur a combustion interne
EP0959282A2 (fr) * 1998-05-20 1999-11-24 BSH Bosch und Siemens Hausgeräte GmbH Soupape pour la commande du milieu gazeux et liquide

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007032041A1 (fr) * 2005-09-12 2007-03-22 Aero Sekur S.P.A. Valve amelioree pour recipient, de preference un cylindre contenant un gaz haute pression
WO2014076051A1 (fr) * 2012-11-19 2014-05-22 Otto Egelhof Gmbh & Co. Kg Vanne d'arrêt pour fluides liquides et gazeux
US9939078B2 (en) 2012-11-19 2018-04-10 Otto Egelhof Gmbh & Co. Kg Shut-off valve for liquid or gaseous media
DE102014105100A1 (de) * 2014-04-10 2015-10-15 Otto Egelhof Gmbh & Co. Kg Ventil, insbesondere Regel- oder Abschaltventil, für flüssige oder gasförmige Medien
DE102014105100B4 (de) * 2014-04-10 2017-11-30 Otto Egelhof Gmbh & Co. Kg Ventil, insbesondere Regel- oder Abschaltventil, für flüssige oder gasförmige Medien
US10174859B2 (en) 2014-04-10 2019-01-08 Otto Egelhof Gmbh & Co. Kg Valve, in particular a regulating or shut-off valve, for liquid or gaseous media
CN113757779A (zh) * 2021-08-03 2021-12-07 毛训峰 一种供暖管道隔热用保温套

Also Published As

Publication number Publication date
AU2002223969A1 (en) 2002-07-01
ITTO20001182A1 (it) 2002-06-20
IT1321117B1 (it) 2003-12-30
ITTO20001182A0 (it) 2000-12-20

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