• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A dampening valve unit, for use in a liquid distribution system having a centrally located liquid source connected via a separate feeding conduit to a liquid tap unit. Each feeding conduit is evacuated of liquid when an associated tap unit is closed and refilled with liquid when the tap unit is opened. The unit comprises a dampening chamber, connectable to said feeding conduit, and a liquid stop valve unit, connectable at an inlet end thereof, to said associated feeding conduit and which has an outlet end being connectable in use to said associated liquid tap unit. Said dampening chamber is adapted to collect gas and is connectable to said associated feeding conduit via a passage which is located at said inlet end of said liquid stop valve unit. The damping valve unit and the feeding conduit in use form a closed system separated from the ambient air.
    公开号:SE1550945A1
    申请号:SE1550945
    申请日:2015-07-02
    公开日:2017-01-03
    发明作者:Abbing Erik
    申请人:3Eflow Ab；
    IPC主号:
    专利说明:

    A DAl/IPENING VALVE UNIT Field of technology The present invention concerns a dampening valve unit, for use in a liquid distributionsystem having a centrally located liquid source connected via at least one separatefeeding conduit to at least one liquid tap unit. The at least one feeding conduit isevacuated of liquid when an associated tap unit is closed and refilled with liquid after thetap unit is opened. The dampening valve unit comprises a dampening chamber, which isconnectable in use to at least one of said feeding conduit. lt comprises also a liquid stopvalve unit, which is connectable in use, at an inlet end thereof, to at least one of saidassociated feeding conduit and which has an outlet end being connectable in use to at least on of said associated liquid tap unit.
    Background art The present applicant has previously applied for a patent for the general system forexample in WO2012148351. As is known per se from this patent application, the system operates in cycles, each comprising the following steps: - evacuating the liquid from the associated feeding conduit after completion of atapping operation at the associated liquid tap unit, by generating a backwardpressure gradient in the associated feeding conduit, so that the liquid flowsbackwards towards the liquid source and the associated feeding conduit thereaftercontains only air or gas being retained therein, and - refilling, upon activating said liquid tap unit, the associated feeding conduit withliquid by generating a forward pressure gradient in the associated feeding conduitand permitting liquid to flow from the liquid source to the associated liquid tap unit,while pushing the remaining air or gas in the feeding conduit towards the associated liquid tap unit at an operating pressure exceeding an ambient air pressure level. ln the prior art system, as disclosed in the above-mentioned PCT application, each feeding conduit is connected to the liquid source by means of a single control valve, which can be open or closed. When it is open, the liquid source will feed liquid into theassociated feeding conduit as long as the liquid tap unit signals that the flow of hot watershould be maintained. When a tap unit is closed or deactivated, a signal is given so as toactivate a centrally located pump which pumps back the liquid from the feeding conduitvia the open control valve back to the liquid source. The same pump may be used forcirculating hot water in the liquid source and for pumping back liquid from the feedingconduits. When a feeding conduit is completely evacuated, which is sensed by a levelsensor, the control valve is closed again, so that the feeding conduit is retained at arelatively low pressure, slightly below the ambient air pressure, with only gas or airtherein. I/|oreover, in the prior art system, air or gas will replace the liquid when it isevacuated from the feeding conduits. For this purpose, there is a special air valve adjacent to the liquid valve between the feeding conduit and the associated tap unit. ln order to have a smooth and practical function the applicant has improved parts of the previous system.
    Summary ofthe invention A problem with the known system is a pressure wave from when the water is refilling theconduits. Another problem is the risk of leaking water through the valve unit whenletting out the air present in the conduits, after they have been emptied of water, during refilling the conduits with water.
    Therefore, the applicant is applying for an improved system and method in a patentapplication filed the same day as the present application, wherein the liquid distributionoperates at a relatively low pressure, when the liquid is evacuated after a tappingoperation, and at a relatively high, but typically still fairly normal, pressure during atapping operation. During the entire operation of the liquid distribution system, each ofthe feeding conduits is kept in communication with an associated, closed dampeningchamber, preferably via an associated passage, accommodating an inlet of a liquid stopvalve unit which is connected to an associated liquid tap unit, in use. The conduits and dampening chamber forms a closed gas system. During the refilling step, the refilling liquid is brought to flow through the conduit into the associated passage. The liquid stopvalve is kept closed until the refilling liquid has reached the inlet. Thereafter, the liquidstop valve is caused to open, for example by way of an increased pressure at said inlet,so as to let liquid flow via the liquid stop valve and into the associated liquid tap unit, butno gas or air may pass the liquid stop valve unit. The gas present in the closed system ispushed in front of the refilling liquid into the dampening chamber during refilling of the conduit. Thus the risk of water leakage is delimited.
    The present invention will concentrate on the dampening valve unit.
    According to one aspect ofthe present invention a dampening valve unit comprises adampening chamber, which is connectable in use to at least one of said feeding conduit.lt comprises also a liquid stop valve unit, which is connectable in use, at an inlet endthereof, to at least one of said associated feeding conduit and which has an outlet endbeing connectable in use to at least on of said associated liquid tap unit. Said dampeningchamber is adapted to collect gas and is connectable to said associated feeding conduitvia a passage which is located in the vicinity of said inlet end of said liquid stop valve unit.The damping valve unit and the feeding conduit in use form a closed system beingseparated from the ambient air. Thus when the refilling liquid pushes the gas in front ofthe liquid both the gas and the liquid will be damped when the gas is compressed in thedampening chamber. Preferably the system has an under pressure in the conduits afterthe conduits are emptied. Thus the amount of gas, such as air, is limited and may quicklybe compressed inside the dampening chamber. This makes also the refilling of liquid very quickly and a user opening a tap unit will almost immediately receive liquid.
    According to one embodiment the liquid stop valve unit comprises at least one non-return valve. This safe guards in a simple and effective way that neither liquid nor gas may leak into the conduit from the tap unit.
    According to one embodiment a pressure responsive part, separate or integrated, isprovided in the liquid stop valve unit which biases the at least one liquid stop valve in a closed state.
    According to another embodiment the pressure responsive part, integrated or separate,has an opening characteristic going from the closed state to an open state with no or anincremental increase of pressure or a decrease of pressure after a threshold pressure hasbeen reached. This type of opening characteristics provides a quick opening and as little flow limitation as possible.
    According to a further embodiment the pressure responsive part is a spring. According toa still further embodiment the spring has a non-linear load-deflection characteristiccurve with a horizontal or negative portion, thus providing a long deflection after a threshold pressure has been reached.
    According to one embodiment at least one small orifice liquid conduit/opening isconnected to the passage at a first end thereof and to said at least one liquid stop valveat a second end thereof, the at least one small orifice liquid conduit/opening being capable of keeping liquid inside of it even when the passage is evacuated of liquid.
    According to one embodiment the at least one liquid stop valve opens when liquid and athreshold pressure reaches the first end ofthe at least one small orifice liquidconduit/opening. Thus it is ascertained that no gas, such as air, can leak out through the liquid stop valve since it will not open until liquid has reach the inlet thereof.
    According to one embodiment at least one gas stop valve is present at the inlet of the dampening chamber.
    According to one embodiment an inlet valve is provided for letting gas into thedampening chamber and the gas stop valve is provided for letting gas out of thedampening chamber, the gas stop valve is provided with a pressure responsive part, thepressure responsive part, integrated or separate, having an opening characteristic goingfrom the closed state to an open state with no or a slight increase of pressure or a decrease of pressure after a threshold pressure has been reached.
    According to one embodiment the inlet valve opens at less than 0,1 bar pressure and the gas stop valve opens at a pressure difference of at least 2 bar, preferably 3 bar.
    According to one embodiment a sensor for sensing pressure or another physical variableis provided downstream the at least one liquid stop valve in the liquid flow direction when the tap unit is open.
    According to one embodiment a sensor for sensing pressure or another physical variableis provided in the liquid conduit and/or dampening chamber and causes the liquid stopvalve to open when: liquid has reached the passage; a threshold pressure has beenreached; or the threshold pressure being a peak pressure has been passed and pressure is decreasing.
    According to one embodiment a sensor is arranged in the tap unit sensing an opening ofthe tap unit and if so opening the fluid stop valve unit and closing the fluid stop valve unit when the tap unit is closed. The sensor could for example being a relay.
    According to one embodiment the dampening chamber is arranged as a housingsurrounding the liquid valve unit. This provides a compact unit which easily may be fitted inside a wall close to the tap unit or even within a tap unit.
    According to one embodiment the damping chamber is arranged separately from the liquid valve unit.According to one embodiment the dampening chamber has a free inner space.
    According to one embodiment the dampening chamber is provided with an innermost,closed compartment having a pre-set pressure. This could be an advantage when dampening small volumes, i.e. short conduits.
    According to one embodiment the compartment is divided by means of a membrane or a piston.
    Further features and advantages will appear from the detail description below where different embodiments of the present invention are disclosed.
    Brief description of the drawings The present invention will now be described in more detail under referral to appended drawings, in which:Fig. 1 shows an embodiment of a dampening valve unit.
    Fig. 2 shows an embodiment of a fluid stop valve unit having a solenoid valve or a motor valve.
    Fig. 3 shows a number of embodiments of a fluid stop valve unit wherein the pressure responsive part is a made of rubber or elastomer.
    Fig. 4a and b shows an embodiment where the pressure responsive part is an integrated spring.Fig. 5 shows an embodiment where the pressure responsive part is a separate spring.
    Fig. 6 shows a graph of load deflection Characteristics for a fluid stop valve according to the invention.Fig. 7 shows an embodiment of a diaphragm spring having spring fingers.Fig. 8 shows an embodiment of a dampening valve unit with a liquid stop valve unit.
    Fig. 9 shows an embodiment of a dampening valve unit with both a liquid stop valve unit and a gas stop valve unit.
    Fig. 10 shows an embodiment of a dampening valve unit wherein a liquid stop valve is arranged inside a dampening chamber.
    Fig. 11 shows an embodiment of a dampening chamber.
    Fig. 12 shows another embodiment of a dampening chamber.Fig. 13 shows a further embodiment of a dampening chamber.Fig. 14 shows a tap unit comprising a dampening valve unit.
    Fig.15a and b shows a switching fluid valve.
    Detailed description of embodiments of the invention ln Fig. 1 a general embodiment of a dampening valve unit 40 ofthe invention is shown.The dampening valve unit 40 comprises a dampening chamber 26 and a liquid stop valveunit 1'. Both an inlet end 28 of the dampening chamber 26 and an inlet end 22 oftheliquid stop valve unit 1' are connected to at least one conduit 41 in use, preferably via apassage 23. An outlet end 24 of the liquid stop valve unit 1' is connected to a liquid tapunit 42 in use. ln Fig. 1 the dampening chamber 26 is provided separately but as will beshown below it is possible to house the liquid stop valve unit 1' inside the dampeningchamber 26. Below different embodiments of different parts of the inventive dampeningvalve unit 40 will be described which may be combined in any possible way unless contradictory.
    The liquid stop valve unit 1' may comprise any type of liquid valve 2. For example it maybe a solenoid valve or any type of motor driven valve or a valve driven by pneumatics orhydraulics, examples are shown in Fig. 2. According to an exemplified valve, at refillinggas is flowing through B into the dampening chamber 26 until liquid is sensed at thevalve. Then the valve is switched over to let liquid flow through A to the tap unit 42. Asensor may be arranged in the system, for example in the liquid tap unit 42, in order tosense an opening or closing of the liquid tap unit 42. This may even be a relay arrangedin the liquid tap unit 42. A sensor for sensing a physical variable, such as pressure, maybe arranged in the dampening chamber 26, conduit 41 or downstream the liquid stopvalve 2, seen in the flow direction when the liquid stop valve 2 is open. A signal from the sensor may be used to control the opening or closing ofthe liquid valve unit 1'.
    According to another embodiment the liquid valve 2 comprises a pressure responsivepart 3 and is kept in a closed state, by default, for example by being biased towards aclosed state or by inherent forces kept closed, until a threshold pressure has beenreached. This part 3 may be integrally or separately arranged in the liquid valve 2.
    Preferably, the liquid valve unit 1' comprises at least one non-return valve. ln Fig. 2 a schematic view over a solenoid or a motor valve is shown. The fluid stop valveunit 1 may be controlled by sensing the pressure and acting upon that using a solenoidvalve, a motor valve, pneumatics or hydraulics. According to an exemplified valve, atrefilling, gas is flowing through B into the dampening chamber 26 until liquid is sensed atthe valve. Then the valve is switched over to let liquid flow through A to the tap unit 42. lt is also possible to let B stay open while A is open. ln Fig. 3 different examples of liquid stop valves 2 are shown which comprise a pressureresponsive part 3 made of rubber or elastomer. For example it could be a duck bill valve4, where the pressure responsive part 3 is integrated as an inherent characteristic of thematerial, or a membrane 5 having at least one slit 6. lf the membrane 5 valve is supported 7 on one side the membrane 5 it will only let fluid through in one direction. ln Fig. 4a and b an embodiment of the liquid stop valve 2 is shown where the pressureresponsive part 3 is a spring 8, which is integrated in the valve 2. The liquid stop valve 2 isshown in two states, a closed state Fig. 4a and an open state Fig. 4b. ln Fig. 4a a valvebody 9 is in sealing contact with a seal10 arranged in a valve seat 11 so that no liquidmay flow through a liquid channel 12. A spring 8 bias the valve body 9 towards the seal10 so that the valve is kept in a closed state until a pressure reaches a threshold level, i.e.over winning the biasing spring force and thus compress the spring 8, whereby the valvebody 9 deflects towards an open state, as shown in Fig. 4b. ln the shown embodimenttwo diaphragm springs of metal, arranged in a mirrored way, are used although it is possible to use only one spring or an elastomer type of spring, for example. ln Fig. 5 an embodiment ofa liquid stop valve unit 1' is shown having a separate pressureresponsive part 3, in this case a separate spring 16. For example, this could be anelastomeric membrane spring or a metal diaphragm spring. Preferably the spring is ofmetal and has spring fingers, see Fig. 7. A liquid stop valve 2 is arranged in series with thespring 16. For example the liquid stop valve 2 may be a non-return valve having aninternal coil spring (not shown) with a constant spring characteristic and a valve body 13biased by this coil spring towards a valve seat 14. A central axle 15 is arranged from the valve body 13 in the flow direction of the fluid in the open state. At the axle 15 the spring 8 is fixedly attached and resting in a housing 17. The spring 16 may have a characteristicas described below, see Fig. 6. When a threshold pressure is reached the non-returnvalve 2 opens and the spring 16 will be compressed with a long deflection opening up the liquid stop valve unit 1', letting fluid flow through the liquid stop valve unit 1'. ln order to have a quick refilling of the conduits 41 in the liquid distribution system it ispreferred to have a liquid stop valve unit 1' that opens as much as possible inimmediately as a threshold pressure has been reached. The pressure responsive part 3may have an opening characteristics as explained in Fig. 6. A graph is shown explainingthe opening characteristics of an inventive fluid stop valve unit 1 comprising at least onefluid stop valve 2 and a pressure responsive part 3. The pressure responsive part 3 maybe separately arranged in the fluid stop valve 2 or integrated. This openingcharacteristics can be accomplished if the load deflection characteristics curve is inaccordance with the suggested curves in the graph such that the deflection is quicklyincreased, even up to fully open valve, without any increase or incremental increase ofload or even a decrease of load after the threshold load has been reached. Curve Ashows a characteristic only having an incremental increase of load in order to have a longdeflection. Curve B shows a characteristic without any increase of load in order to have along deflection. Curve C shows a characteristic with a decreasing load and despite this having a long deflection. ln Fig. 7 a spring 8 is shown having a diaphragm design with spring fingers 31 arrangedalong a rim 32 of the spring 8 and the fingers 31 pointing with their free ends 33 towardsa centre 34. This spring 8 may have one or two resting states and a characteristic as shown in the graph of Fig. 6. ln Fig. 8 a dampening valve unit 40 is shown for use in a liquid distribution system havingat least one feeding conduit 41 and at least one tap unit 42. There is a liquid stop valveunit 1' comprising two liquid stop valves 18, preferably non-return valves, arranged inseries with also a separate pressure responsive part 3, in the shown case two mirroreddiaphragm springs 19. The design is similar to the embodiment of Fig. 5. An inlet side 22 of the liquid stop valve unit 1' is connected to a conduit 41, preferably via a passage 23, in use. An outlet end 24 is connected to the tap unit 42, in use. A pressure sensor 20 isprovided in a housing 21 for sensing the pressure downstream the valves 18 in the flow direction towards the tap unit.
    At least one small orifice liquid conduit/opening 25 is provided at the inlet end 22 of theliquid stop valve unit 1', which is open at its first end towards the feeding conduit 41 orpassage 23 in use and to the at least one liquid stop valve 1' at its second end. The atleast one small orifice liquid conduit/opening 25 is capable of keeping liquid inside iteven when the feeding conduit or passage 23 is evacuated of liquid in use. This could beaccomplished by means of capillary forces, for example. When liquid is reaching the atleast one small orifice/opening and the pressure of the liquid has reached a thresholdlevel the at least one liquid stop valve 18 will open and due to the separate spring 19 theopening characteristics will be as shown in Fig. 6. The small orifice opening is preferablyclose to the inlet 22 ofthe liquid stop valve unit 1'. A dampening chamber 26 is providedseparately, although it is also conceivable to arrange the liquid stop valve unit inside the dampening chamber 26. ln Fig. 9 two fluid stop valves 1', 1"are arranged in a dampening valve unit 27. One unit1' is a liquid stop valve unit similar to the embodiment of Fig. 8. The other unit 1" is a gasstop valve 1", for use in a liquid distribution system having at least one feeding conduit41 and at least one tap unit 42. The gas stop valve unit 1" has an inlet end 28 which isarranged to be connected to a gas dampening chamber 26 in use and an outlet end 29arranged to be connected to the liquid feeding conduit 41 in use. A gas inlet valve 43,preferably a non-return valve, is provided for letting gas into the dampening chamber 26when a threshold pressure has been reached. For example the pressure threshold may be less than 0,1 bar.
    The gas stop valve unit 1" shown has a separate pressure responsive part 3, in this case aseparate spring 16. For example, this could be an elastomeric membrane spring or ametal diaphragm spring. Preferably the spring is of metal and has spring fingers, see Fig.7. A gas stop valve 30 is arranged in series with the spring 16. For example the gas stop valve 30 may be a non-return valve having an internal coil spring (not shown) with a 11 constant spring characteristic and a valve body 13 biased by this coil spring towards avalve seat 14. A central axle 15 is arranged from the valve body 13 in the flow directionof the gas in the open state. At the axle 15 the spring 16 is fixedly attached and resting ina housing 17. The spring 16 may have a characteristic according to Fig. 6. When athreshold pressure is reached the non-return valve 30 opens and the spring 16 will becompressed with a long deflection opening up the gas stop valve unit 1", letting gas flowthrough the gas stop valve unit 1". |fthe spring 16 has two resting positions the springmay stay in an open position and will thus need an initiating pressure from the gas beingpushed in front of the liquid during refilling. For example a plate or the like (not shown),area increasing, arranged at the free end of the axle 15 could help transferring pressureto a closing movement of the spring 16. The gas stop valve unit 1" may for example openwhen a pressure difference between the inlet end 28 and the outlet end 29 is more than2 bar, preferably more than 3 bar. Also in this embodiment the dampening chamber 26 is arra nged sepa rately. ln Fig. 10 the liquid stop valve unit 1' is arranged within the dampening chamber 26providing a compact dampening valve unit 40. Here the small orifice conduit 25 is muchlonger than previously shown, where it has been more of an opening. When liquid isreaching the passage 23 and the inlet of the small orifice conduit the liquid stop valve 1'will open and let the liquid flow towards and out ofthe tap unit 42. The gas, such as air,being pushed in front of the liquid during refilling of the feeding conduit 41, will belocked and compressed inside the dampening chamber 26. One ofthe two fluid stop valves 2 is shown in detail in both an open and closed state. ln Fig. 11 another embodiment of a dampening valve unit 40 is shown. A dampeningchamber 26 is provided with liquid valve unit 1' reaching through its inlet end and withthe small orifice conduit 25through the passage 23. The shown dampening chamber 26 is welded along a welding joint 44. ln Fig. 12 an embodiment of a dampening chamber 26 is shown comprising an innermost, closed compartment 46 having a preset pressure. ln the shown embodiment 12 the closed compartment 46 is divided off by means of a membrane. This could also be accomplished with a movable wall 47, functioning as a piston, as shown in Fig. 13. ln Fig. 14 the dampening valve unit 40 is provided inside a tap unit 42 in a very compactembodiment. Also in this embodiment is the liquid valve unit 1' arranged inside thedampening chamber 26. The small orifice conduit 25 reaches below the bottom of thedampening chamber and into the passage 23 of the end ofthe feeding conduit 41 so thatwhen the conduit 41 is refilled the liquid valve unit 1' will open when the water hasreached the conduit and thereby not risking leakage of gas, such as air, through the tap unit 42.
    Fig.15a and b shows two states of a combined liquid and gas valve unit 48. ln Fig.15a avalve body 49 is movable between to positions. The one shown in Fig. 15a is when it isopen for gas into the dampening chamber via its inlet 28. The gas is coming from thefeeding conduit 41 during refilling of liquid. When the liquid reaches the combined valveunit 48 the pressure ofthe liquid forces the valve body 49 against the force of the spring8 to the second position where the valve is closed for gas but open for liquid through the valve 48 through the outlet 24 towards the tap unit 42.
    Finally, an idea ofthreshold pressures will be described. A liquid stop valve 1' could havea threshold pressure of 25-50% of the system pressure if there isn't any gas valves 1", 43at the dampening chamber 26. This could for example be a pressure of 1-2 bar. On the other hand, when gas valves 1", 43 are present at the dampening chamber 26, the liquid stop valve 1' could open at 50-75% of the system pressure, for example.
    A lot of different embodiments of different parts of a dampening valve unit has beendescribed and the different embodiments of parts may be combined into a dampening valve unit in any possible way as long it is not contradictory.
    权利要求:
    Claims (9)
    [1] 1. A dampening valve unit, for use in a liquid distribution system having a centrallylocated liquid source connected via at least one separate feeding conduit to at leastone liquid tap unit, wherein at least one feeding conduit is evacuated of liquid afteran associated tap unit is closed and refilled with liquid after the tap unit is opened,the dampening valve unit comprising a dampening chamber, which is connectable inuse to at least one of said feeding conduit, and a liquid stop valve unit, which is alsoconnectable in use, at an inlet end thereof, to at least one of said associated feedingconduit and which has an outlet end being connectable in use to at least one of saidassociated liquid tap unit, characterized in that said dampening chamber is adaptedto collect gas and is connectable to said associated feeding conduit via a passagewhich is located in the vicinity of said inlet end of said liquid stop valve unit, and thatthe dampening valve unit and the feeding conduit in use form a closed system being separated from the ambient air.
    [2] 2. The dampening valve unit according to claim 1, wherein the liquid stop valve unit comprises at least one non-return valve.
    [3] 3. The dampening valve unit according to claim 1 or 2, wherein a pressure responsivepart, separate or integrated, is provided in the liquid stop valve unit which biases the at least one liquid stop valve in a closed state.
    [4] 4. The dampening valve unit according to claim 3, wherein the pressure responsive part,integrated or separate, having an opening characteristic going from the closed stateto an open state with no or a slight increase of pressure or a decrease of pressure after a threshold pressure has been reached. 10. 11. 14 The dampening valve unit according to claim 3 or 4, wherein the pressure responsive part is a spring. The dampening valve unit according to claim 5, wherein the spring has a non-linearload-deflection characteristic curve with a horizontal or negative portion, thus providing a long deflection after a threshold pressure has been reached. The dampening valve unit according to any one ofthe previous claims, wherein atleast one small orifice liquid conduit/opening is connected to the passage at a firstend thereof and to said at least one liquid stop valve at a second end thereof, the atleast one small orifice liquid conduit/opening being capable of keeping liquid inside of it even when the passage is evacuated of liquid. The dampening valve unit according to claim 7, wherein the at least one liquid stopvalve opens when liquid and a threshold pressure reaches the first end ofthe at least one small orifice liquid conduit/opening. The dampening valve unit according to any ofthe previous claims, wherein at least one gas stop valve is present at the inlet of the dampening chamber. The dampening valve unit according to claim 9, wherein an inlet valve is provided forletting gas into the dampening chamber and the gas stop valve is provided for lettinggas out of the dampening chamber, the gas stop valve is provided with a pressureresponsive part, the pressure responsive part, integrated or separate, having anopening characteristic going from the closed state to an open state with no or a slightincrease of pressure or a decrease of pressure after a threshold pressure has been reached. The dampening valve unit according to claim 10, wherein the inlet valve opens at lessthan 0,1 bar pressure and the gas stop valve opens at a pressure difference of at least 2 bar, preferably 3 bar. 12. 13. 14. 1
    [5] 5. 1
    [6] 6. 1
    [7] 7. 1
    [8] 8. 1
    [9] 9. The dampening valve unit according to any one of the previous claims 1-11, whereina sensor for sensing pressure or another physical variable is provided downstreamthe at least one liquid stop valve in the liquid flow direction when the tap unit is open. The dampening valve unit according to any one ofthe previous claims 1-11, whereina sensor for sensing pressure or another physical variable is provided in the liquidconduit and/or dampening chamber causes the liquid stop valve to open when: liquidhas reached the passage; a threshold pressure has been reached; or the threshold pressure being a peak pressure has been passed and pressure is decreasing. The dampening valve unit according to claim 1, wherein a sensor is arranged in thetap unit sensing an opening ofthe tap unit and if so opening the fluid stop valve unit and closing the fluid stop valve unit when the tap unit is closed. The dampening valve unit according to any one of the previous claims, wherein the dampening chamber is arranged as a housing surrounding the liquid valve unit. The dampening valve unit according to any one of the previous claims 1-14, wherein the dampening chamber is arranged separately from the liquid valve unit. The dampening valve unit according to claim 16, wherein the dampening chamber has a free inner space. The dampening valve unit according to claim 16, wherein the dampening chamber is provided with an innermost, closed compartment having a preset pressure. The dampening valve unit according to claim 17, wherein the compartment is divided by means of a membrane or a piston.
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    同族专利:
    公开号 | 公开日
    EP3317466A1|2018-05-09|
    SE541086C2|2019-04-02|
    WO2017001328A1|2017-01-05|
    US10550986B2|2020-02-04|
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    法律状态:
    2021-03-02| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1550945A|SE541086C2|2015-07-02|2015-07-02|A dampening valve unit|SE1550945A| SE541086C2|2015-07-02|2015-07-02|A dampening valve unit|
    PCT/EP2016/064832| WO2017001328A1|2015-07-02|2016-06-27|A dampening valve unit|
    EP16733918.3A| EP3317466B1|2015-07-02|2016-06-27|A dampening valve unit|
    US15/738,294| US10550986B2|2015-07-02|2016-06-27|Dampening valve unit|
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