WO2021052775A1 - Dispositif de régulation de pression pour réguler une pression à délivrer au niveau d'une ouverture de sortie du dispositif de régulation de pression, procédé et unité de commande pour produire un dispositif de régulation de pression, et procédé et unité de commande pour faire fonctionner un dispositif de régulation de pression - Google Patents

Dispositif de régulation de pression pour réguler une pression à délivrer au niveau d'une ouverture de sortie du dispositif de régulation de pression, procédé et unité de commande pour produire un dispositif de régulation de pression, et procédé et unité de commande pour faire fonctionner un dispositif de régulation de pression Download PDF

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Publication number
WO2021052775A1
WO2021052775A1 PCT/EP2020/074694 EP2020074694W WO2021052775A1 WO 2021052775 A1 WO2021052775 A1 WO 2021052775A1 EP 2020074694 W EP2020074694 W EP 2020074694W WO 2021052775 A1 WO2021052775 A1 WO 2021052775A1
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WO
WIPO (PCT)
Prior art keywords
pressure
regulating device
pressure regulating
chamber
output
Prior art date
Application number
PCT/EP2020/074694
Other languages
German (de)
English (en)
Inventor
Franz Laermer
Hannah Bott
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2021052775A1 publication Critical patent/WO2021052775A1/fr

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane
    • G05D16/0661—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane characterised by the loading mechanisms of the membrane

Definitions

  • Pressure regulating device for regulating a pressure to be output at an outlet opening of the pressure regulating device
  • Control device for producing a pressure regulating device and method and control device for operating a pressure regulating device
  • the invention is based on a pressure regulating device for regulating a pressure to be output at an outlet opening of the pressure regulating device, a method and a control device for producing a pressure regulating device and a method and a control device for operating a pressure regulating device according to the preamble of the independent claims.
  • the present invention also relates to a computer program.
  • LoC Lab-on-a-Chip
  • Microfluidic systems such as “Lab-on-a-Chip” (LoC) systems accommodate the entire functionality of a macroscopic laboratory on a plastic substrate the size of a plastic card.
  • the functionality of the LoC systems is increased by active components such as pumps.
  • Electronic pressure regulators that perform the desired function in an electronic control circuit by means of pressure and / or flow sensors and an adjusting element, such as a needle valve, are often available.
  • electronic pressure regulators are relatively expensive.
  • they cannot be installed as “plug-and-play devices” in a given analyzer or diagnostic device without major changes, since an electrical interface should also be operated, which would go beyond the scope of “plug-and-play”. Disclosure of the invention
  • the approach presented here creates a possibility to carry out a pressure change in a fluid in a controlled manner.
  • a pressure regulating device for regulating a pressure to be output at an outlet opening of the pressure regulating device.
  • the pressure regulating device has a fluid guide device, a reference pressure element and a throttle unit.
  • the fluid guide device is designed to guide a fluid from an input chamber provided with an inlet opening of the fluid guide device to an output chamber provided with the outlet opening of the fluid guide device.
  • the input chamber and the output chamber are connected to one another by a channel.
  • the reference pressure element has a reference chamber separated from the output chamber by means of a membrane.
  • the reference pressure element also has a closure element coupled to the membrane for the controlled release of a fluid passage through the channel.
  • the throttle unit is fluidically connected between the outlet opening and the reference chamber and is designed to regulate the pressure to be output.
  • the pressure regulating device can be implemented, for example, as a pressure reducer which can be used, for example, in or on a pump device or can be coupled.
  • the outlet opening can, for example, be an opening at which a fluid, which is for example gaseous, is discharged from the pressure regulating device.
  • the outlet opening is implemented as a part of the fluid guide device, which also has the inlet opening, the inlet chamber and the outlet chamber.
  • the inlet chamber and the outlet chamber are implemented, for example, as cavities into which the fluid can flow and from which the fluid can flow.
  • the channel can be implemented transversely to the chambers so that it can form a connection between the two chambers, for example.
  • the closure element can be implemented in a T-shape, for example, so that it can close the channel.
  • the closure element can extend through the channel. Since the closure element is arranged on the membrane, the fluid passage can be controlled in the form of opening or closing of the channel by means of the closure element, for example an opening width of the channel can be gradually released or enlarged or reduced by the closure element. The pressure generated by the fluid flowing through can thereby advantageously be regulated.
  • the throttle unit can be designed to variably set a throttle resistance. This means that by setting the throttle unit, for example, a maximum rate of pressure increase can be controlled. In this way, a linearization of the pressure profile over time between the inlet opening and the outlet opening can be realized very efficiently.
  • the throttle unit can have a check valve which can be designed to allow a fluid flow from the reference chamber through the check valve and to prevent a fluid flow through the check valve into the reference chamber.
  • a period of time and, additionally or alternatively, a speed of change between pressure values in the output chamber can advantageously be controlled, for example increased or decreased.
  • the check valve can be arranged parallel to the throttle resistor. The check valve can thereby advantageously be used as a bypass in order, for example, to suddenly equalize a pressure.
  • a first connection of the check valve can be connected to the reference chamber and a second connection of the check valve can be connected to a control pressure connection.
  • the control pressure connection can be implemented, for example, as a switch between a first (for example a low) and a second (for example a high) pressure level, by means of which a flow direction of the fluid can advantageously be changed or the output chamber can be quickly subjected to a desired pressure level.
  • a constant input pressure of e.g. 1.6 bar is advantageously permanently applied to the input of the pressure regulation unit, with the control of the output pressure of the pressure regulation unit being implemented by the control pressure connection.
  • the reference pressure element can have a spring which can be designed to exert a predefined force on the membrane from the reference chamber.
  • the spring can be arranged between a wall of the reference chamber and the membrane. A degree of elasticity of the spring or a bias of the spring is predefined. In this way, the spring can advantageously exert a predetermined counterpressure on the membrane when, for example, the membrane is moved out of a rest position due to an increase or decrease in pressure caused by the fluid.
  • the spring can be designed to variably adjust the force.
  • a preload of the spring can be adjustable.
  • the pressure acting on the membrane can thereby advantageously be regulated so that, for example, the rate of pressure increase of the fluid in connection with the throttle resistance can be precisely metered.
  • the reference pressure element can have a pressure setting element which can be designed to set a pretensioning of a membrane and to change it additionally or alternatively.
  • the pressure adjustment element can be designed in particular as an adjustment screw in conjunction with a spring.
  • this can provide a further improvement in the setting option for the reference pressure level in the reference chamber
  • a method for producing a pressure regulating device for regulating a pressure to be output at an outlet opening of the pressure regulating device is presented in one of the aforementioned variants, the method comprising a step of joining.
  • the fluid guide device, the reference pressure element and the throttle unit are joined together in order to produce the pressure regulating device in one of the variants presented above.
  • the advantageous pressure regulating device can be produced as a whole, so that it can be coupled to further devices, for example a pump.
  • a method for operating a pressure regulating device for regulating a pressure to be output at an outlet opening of the pressure regulating device is presented in one of the variants presented.
  • the method comprises a step of applying and a step of changing.
  • a first pressure level is applied to the inlet opening.
  • the first pressure level applied to the first inlet opening is changed to a second pressure level in order to operate the pressure regulating device.
  • the method can advantageously regulate a pressure profile.
  • the first pressure level in the step of changing the first pressure level can be changed from a positive pressure level value to a negative one Pressure level value can be changed or the first pressure level can be changed from a negative pressure level value to a positive pressure level value.
  • the change can be repeated cyclically. This means that the pressure level value can be increased or decreased.
  • the pressure level can advantageously be adapted as a function of the situation so that, for example, critical situations can be avoided.
  • This method can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control device.
  • control device which is designed to carry out, control or implement the steps of a variant of a method presented here in corresponding devices.
  • This embodiment variant of the invention in the form of a control device also enables the object on which the invention is based to be achieved quickly and efficiently.
  • control device can have at least one processing unit for processing signals or data, at least one storage unit for storing signals or data, at least one interface to a sensor or an actuator for reading in sensor signals from the sensor or for outputting control signals to the actuator and / or have at least one communication interface for reading in or outputting data that is embedded in a communication protocol.
  • the computing unit can be, for example, a signal processor, a microcontroller or the like, wherein the storage unit can be a flash memory, an EEPROM or a magnetic storage unit.
  • the communication interface can be designed to read in or output data wirelessly and / or wired, a communication interface that can input or output wired data, for example, feed this data electrically or optically from a corresponding data transmission line or output it into a corresponding data transmission line.
  • a control device can be understood to mean an electrical device that processes sensor signals and outputs control and / or data signals as a function thereof.
  • the control device can have an interface that can be designed in terms of hardware and / or software.
  • the interfaces can be part of a so-called system ASIC, for example, which contains a wide variety of functions of the control device. However, it is also possible that the interfaces are separate, integrated circuits or at least partially consist of discrete components.
  • the interfaces can be software modules that are present, for example, on a microcontroller alongside other software modules.
  • control device controls a method for operating a pressure regulating device for regulating a pressure to be output at an outlet opening of the pressure regulating device.
  • control device can, for example, respond to sensor signals such as an application signal that represents application of a first pressure level to the input opening and access a change signal representing a change in the first pressure level to a second pressure level.
  • the control takes place via actuators such as an application unit, which is designed to provide the application signal, and a change unit, which is designed to output the change signal.
  • a computer program product or computer program with program code which can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk or an optical memory, and for performing, implementing and / or controlling the steps of the method according to one of the embodiments described above is also advantageous is used, especially when the program product or program is executed on a computer or device.
  • FIG. 1 shows a schematic cross-sectional illustration of a pressure regulating device according to an exemplary embodiment
  • FIG. 2A shows a schematic cross-sectional illustration of a pressure regulating device with a check valve according to an exemplary embodiment
  • FIG. 2B shows a schematic cross-sectional illustration of a pressure regulating device with a check valve according to an exemplary embodiment
  • FIG. 3 shows a curve diagram of a pressure level profile for a pressure regulating device according to an exemplary embodiment
  • FIG. 4 shows a flow chart of a method for producing a pressure regulating device according to an exemplary embodiment
  • FIG. 5 shows a block diagram of a control device for performing a method for producing a pressure regulating device according to an exemplary embodiment
  • FIG. 6 shows a flow chart of a method for operating a pressure regulating device according to an exemplary embodiment
  • FIG. 7 shows a block diagram of a control device for performing a method for operating a pressure regulating device according to an exemplary embodiment.
  • FIG. 1 shows a schematic cross-sectional illustration of a pressure regulating device 100 according to an exemplary embodiment.
  • the pressure regulating device 100 can be used in conjunction with a pump.
  • the pressure regulating device 100 is designed to regulate a pressure that is output at an outlet opening 105 of the pressure regulating device 100.
  • the pressure regulating device 100 has a fluid guide device 110 which is designed to guide the, for example, gaseous fluid from an input chamber 120 provided with an inlet opening 115 of the fluid guide device 110 to an outlet chamber 125 provided with the outlet opening 105 of the fluid guide device 110.
  • the exit port 105 is shaped to discharge the fluid from the pressure regulator 100.
  • the inlet opening 115 is shaped analogously to this in order to allow the fluid into the inlet chamber 120.
  • the inlet chamber 120 and the outlet chamber 125 are separated from one another by a channel 130 or are connected to one another via this.
  • the inlet chamber 120 is elongated and optionally arranged parallel to the outlet chamber 125, so that the channel 130 is shaped as a cross connection between the two chambers 120, 125.
  • the channel 130 is arranged at right angles to the two chambers 120, 125.
  • the pressure regulating device 100 furthermore has a reference pressure element 135 with a reference chamber 145 separated from the outlet chamber 125 by means of a membrane 140.
  • the reference pressure element 135 is designed to at least approximately equalize the pressure and a reference pressure.
  • the reference chamber 145 is accordingly implemented as a space in which the reference pressure is arranged.
  • the reference pressure corresponds to an atmospheric pressure, for example.
  • the reference pressure element 135 also has a closure element 150 for the controlled release of a fluid passage through the channel 130, which is coupled to the membrane 140.
  • the closure element 150 arranged on the membrane 140 is implemented in a T-shape according to this exemplary embodiment.
  • a head is arranged on a free end of the closure element 150.
  • This head is according to this Embodiment arranged in the input chamber 120 so that it closes or can close the channel 130 when there is a relative negative pressure in the reference chamber 145 with respect to the pressure in the output chamber, since the membrane 140 in this case arches in the direction of the reference chamber 145.
  • the reference pressure element 135 has a spring 155 which is designed to exert a predefined force on the diaphragm 140 from the reference chamber 145.
  • a preload of the spring 155 can be variably adjusted.
  • the spring 155 and the closure element 150 lie on a first axis 160 running through the pressure regulating device 100.
  • the membrane 140 lies on a second axis 165 arranged transversely to the first axis 160.
  • the reference pressure element 135 has a pressure setting element, not shown in FIG. 1, which is designed to set and / or change the pressure in the reference chamber 145.
  • the pressure adjustment element is designed, for example, as an adjustment screw in conjunction with a spring.
  • the pressure regulating device 100 furthermore has a throttle unit 170 which is fluidically connected between the outlet opening 105 and the reference chamber 145 and is designed to regulate the pressure to be output.
  • a throttle resistance of the throttle unit 170 is variably adjustable.
  • pressure regulation in the form of a pressure ramp generator for a pump for example a lab-on-chip (LoC) pump
  • a negative pressure of -600 mbar for example, whereby a liquid to be pumped was sucked into a pump chamber.
  • the negative pressure was replaced by an overpressure of, for example, 1.6 bar, the TPU membrane was suddenly deflected and the liquid to be pumped was displaced from the pump chamber. Since the pressure changes occur suddenly when the control valves are operated, the liquid to be pumped becomes suddenly expressed from the pumping chamber, which results in high uncontrolled flow conditions in the LoC.
  • the throttle unit 170 is a previously used solution to slow down the pressure increase or pressure drop at the elastic pump membrane.
  • a time course of the pressure change is basically exponential, which means that at the beginning there is a rapid pressure change at the membrane 170, which slows down more and more in the direction of the saturation pressure.
  • Another advantage of a controlled pressure change or slow pressure build-up on the elastic membrane 140 is that partial quantities of a pump chamber volume, for example fractions of 25mI, can be conveyed in a very controlled manner in the LoC, which would have great advantages in terms of fluid management, such as in connection with the targeted mixing of different liquids for the purpose of controlled dilution.
  • the approach presented here provides a so-called “plug-and-play” device that can be easily inserted as a passive component in the pneumatic control line leading to a pump chamber in the LoC and no further changes are necessary.
  • the approach presented here represents a very cost-effective problem solution or improvement that can be used at any time and expanded again at any time if necessary.
  • the pressure regulating device 100 can be implemented, for example, as a spring pressure gas pressure reducer, the reference gas volume of which is connected to the output of the pressure regulating device 100 via an adjustable throttle unit 170, which is also referred to as a throttle, with a throttle resistor R.
  • an adjustable throttle unit 170 which is also referred to as a throttle
  • a throttle resistor R for example, a 3mm plastic hose was inserted gas-tight according to this embodiment in a bore of the reference volume of the pressure regulating device 100, which is referred to here as reference chamber 145 and represents a connection to the surrounding atmosphere and supplies the reference pressure to the membrane 140.
  • the reference chamber 145 is therefore no longer connected to atmospheric pressure, but rather to the outlet opening 105, which is also referred to as the pressure reducer outlet, or to the pressure p out prevailing there through the adjustable throttle unit 170.
  • a variant for a gas grill with an output pressure of 50 mbar was selected experimentally as the pressure regulating device 100.
  • a pressure regulating device 100 based on the reference pressure p ref with output pressures of 20 mbar, 25 mbar, 30 mbar and 50 mbar.
  • a pressure regulating device 100 with a low output pressure of the order of magnitude of 10 mbar or less than 10 mbar is suitable for the purpose.
  • a differential pressure present at the throttle unit 170 is constant at any time at 50 mbar, for example, when po is applied to the inlet opening 115 of the pressure regulating device 100.
  • pressure regulating devices 100 20 mbar or 25 mbar or 30 mbar are accordingly also conceivable.
  • a gas flow via the throttle unit 170 from the outlet opening 105 into the reference chamber 145 is constant at all times, which leads to an approximately linear pressure increase at the outlet opening 105.
  • Due to the small differential pressure at the throttle unit 170 of only a few 10 mbar very slow pressure increases can also be achieved with easily controllable throttle resistances. According to one embodiment, pressure rise times of several minutes were easily achieved until po was reached.
  • a “plug-and-play” device which can be simply inserted as a passive component in the pneumatic control line leading to a pump chamber in the LoC and which causes an adjustable, slow pressure increase over time in this line For example, to allow pumping processes to run more slowly and in a more controlled manner.
  • the present approach can be implemented, for example, as a particularly small-sized solution that takes up very little space.
  • connections are ideally used that are compatible with the pneumatics of a corresponding laboratory analyzer, so that this can be supplemented with the presented approach particularly easily via “plug-and-play”.
  • a pressure regulating device 100 which is also referred to as a mini pressure regulator, was used according to an alternative embodiment, the output pressure of which, for example, a pressure adjustment screw to values of 0 ... 2000 mbar and in particular very small pressure values around 0 mbar +, which means from 0 mbar upwards, can be freely set.
  • This pressure regulating device 100 has dimensions of 45 mm each at a maximum in two spatial directions, the height only approx. 10 mm including the connections and the mentioned pressure adjustment screw.
  • providers of such mini pressure reducers but only a few brands that work from an output pressure of Ombar.
  • the rise time of the outlet pressure p is freely selectable.
  • the pressure regulating device 100 has a flexible pressure adjustment facility, such as the aforementioned pressure adjustment screw, a variably adjustable throttle resistor R can advantageously be dispensed with.
  • the rise time of the outlet pressure p is also freely selectable by setting the pressure via the throttle resistance.
  • a throttle resistor configured as an independent component is dispensed with in a cost and space-saving manner. Rather, the latter can be defined by “integrated
  • Resistance constructions for example in the form of a filler material in a connecting tube between reference chamber 145 and outlet opening 105.
  • a silica material, a glass frit, wadding, a small-pore sterile filter or a similar material that provides a flow resistance is introduced or pressed in. It is also optionally possible to insert a slim glass or plastic frit in the form of a "resistance pill" between two hose sections.
  • a screen with one or more very small openings can be inserted into the hose or hose section, for example in the form of a stopper made of elastic rubber material, Teflon or plastics that seals over the edge and contains one or more very small bores.
  • the pressure regulating device 100 can, thanks to its small size and space requirement, be plugged in particularly easily as a smart “plug-and-play device” without further intervention to upgrade a pneumatic system.
  • FIG. 2A shows a schematic cross-sectional illustration of a pressure regulating device 100 with a check valve 200 according to an exemplary embodiment.
  • the pressure regulating device 100 shown here can correspond to the pressure regulating device 100 described in FIG. 1, whereby, according to this exemplary embodiment, it is expanded by the check valve 200, which according to this exemplary embodiment is implemented as part of the throttle unit 170 and / or is arranged parallel to it.
  • the check valve 200 enables a flow direction and blocks as soon as the fluid wants to flow from a direction opposite to the direction of flow. This means that the check valve 200 is designed to enable a fluid flow through the check valve 200 from the reference chamber 145 and to prevent a fluid flow through the check valve 200 into the reference chamber 145.
  • the fluid flows through the inlet opening 115 into the inlet chamber 120. From there it flows through the channel 130 into the outlet chamber 125 and in the direction of the outlet opening 105 a flow rate of the fluid in the direction of the reference chamber 145 is throttled. In such a case, the pressure in the outlet chamber rises continuously over a period of time in a linear manner. Conversely, if there is an overpressure in the reference chamber 145, the reference chamber 145 according to this exemplary embodiment can be suddenly emptied by means of the check valve 200. According to this exemplary embodiment, a first connection 205 of the check valve 200 is connected to the reference chamber 145 and a second connection 210 of the check valve 200 is connected to the outlet opening of the pressure regulating valve.
  • the throttle and the check valve are located between the outlet of the pressure control unit and the reference volume, so they are "connected in parallel".
  • the control of the pressure regulating unit is carried out by switching the input pressure r, h between the pressure values p vac and po.
  • the input pressure can r, h between po and varied p vac.
  • FIG. 2B shows a schematic cross-sectional illustration of a pressure regulating device 100 with a check valve 200 according to an exemplary embodiment alternative to FIG. 2A.
  • a first connection 205 of the check valve 200 is connected to the reference chamber 145 and a second connection 210 of the check valve 200 is connected to a control pressure connection.
  • the throttle lies between the outlet of the pressure control unit and the reference volume.
  • the check valve 200 is now located between the reference volume and the control pressure connection.
  • the pressure control unit is controlled by switching the pressure on Control pressure connection between the pressure values p vac and po.
  • the approach introduces a simple passive component that provides a slow, controlled, time-linear pressure rise and sudden pressure drop for the pump control in a LoC.
  • an exact dosing and pumping of partial volumes of a pump chamber that is to say for example exactly predetermined fractions of 25 pl of the pump chamber volume, is made possible. This also enables mixing processes with exact mixing ratios of liquids.
  • the approach that is to say the pressure regulating device 100, can be plugged in as a “plug-and-play device” without further intervention.
  • the throttle unit 170 with non-return characteristics can be used.
  • a check valve 200 is connected in parallel to the throttle resistor, which, analogous to a diode, guides a gas flow in the reverse direction past the throttle resistor.
  • the pressure regulating device 100 presented here represents in an electronic equivalent circuit diagram or “network model” as an analogue to the fluidic processes, ie a combination of an amplifier component with an RC element as negative feedback.
  • the RC element denotes electronic circuits in the mentioned electronic network model analogue, which are composed of an ohmic resistor and a capacitor. Since there is always a constant differential pressure at the resistor R with “pressure upward control”, a “reloading process” of the reference volume takes place linearly over time. Since this differential pressure is very small, with practicable throttle resistances a very slow rise time of the outlet pressure in the "upward case” can be achieved.
  • FIG. 3 shows a diagram of a pressure level curve 300 for a pressure regulating device according to an exemplary embodiment.
  • the pressure level curve 300 shown here can be used in a pressure regulating device, as was previously described in FIGS. 1 or 2.
  • the x-axis 305 of the curve diagram represents a continuous time.
  • the y-axis 310 of the curve diagram represents a pressure level value.
  • a first curve 315 and a second curve 320 are shown.
  • the first curve 315 represents an inlet pressure level Pin, that is to say a pressure level at the inlet opening of the pressure regulating device.
  • the second curve 320 represents an output pressure level p out , that is to say a pressure level at the output opening of the pressure regulating device.
  • the first curve 315 shows that, according to this exemplary embodiment, the input pressure level suddenly rises to a positive pressure level value 325, such as 1.6 bar, and after a certain time also suddenly drops to a negative pressure level value 330, for example -600 mbar.
  • a positive pressure level value 325 such as 1.6 bar
  • a negative pressure level value 330 for example -600 mbar.
  • such periods according to this exemplary embodiment take place at shorter and shorter time intervals, so that a period duration also varies.
  • a time duration of the positive pressure level value 325 or the negative pressure level value 330 varies.
  • the duration of the positive pressure level value 325 tends to lengthen and, conversely, the duration of the negative pressure level value 330 is shortened.
  • the second curve 320 illustrates the pressure profile at the output of the pressure regulating unit with a time-linear pressure increase until it reaches the positive pressure level value 325.
  • the output pressure level reaches final pressure values at shorter periods that are smaller than the positive pressure level value 325, which would lead to only partial emptying of a pump chamber in the LoC, which may be expressly desired in some applications.
  • the pressure drops suddenly to the negative pressure level value 330.
  • the behavior of the output pressure level p out or in the case of pressure changes or switching processes at the input opening and thus at the input pressure level Pi n between p vac and po, is represented by the second curve 320.
  • FIG. 4 shows a flow chart of a method 400 for producing a pressure regulating device according to an exemplary embodiment.
  • the pressure regulating device to be produced can correspond to the pressure regulating device described in one of FIGS. 1 or 2.
  • the method 400 comprises a step 405 of joining the fluid guide device, the reference pressure element and the throttle unit together in order to produce the pressure regulating device.
  • FIG. 5 shows a block diagram of a control device 500 for carrying out a method for producing a pressure regulating device according to an exemplary embodiment.
  • the control device 500 has a provision unit 505 which is designed to provide a merge signal 510.
  • the method 600 comprises a step 605 of applying and a step 610 of changing.
  • step 605 of the pressurization the inlet opening of the pressure regulating device is pressurized with a first pressure level.
  • step 610 of changing the first pressure level at the inlet opening is changed to a second pressure level in order to operate the pressure regulating device.
  • the first pressure level is optionally changed in step 610 of changing from a positive pressure level value to a negative pressure level value or the first pressure level is changed from a negative pressure level value to a positive pressure level value. The change is repeated cyclically.
  • control device 700 for performing a method for operating a pressure regulating device according to an exemplary embodiment.
  • the control device 700 can, for example, control a method as described in FIG. 6.
  • the control device 700 has an application unit 705, which is designed to provide an application signal 710, and a change unit 715, which is designed to output the change signal 720.
  • an exemplary embodiment comprises an “and / or” link between a first feature and a second feature, this is to be read in such a way that the exemplary embodiment according to one embodiment includes both the first feature and the second feature and, according to a further embodiment, either only the has the first feature or only the second feature.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

L'invention concerne un dispositif de régulation de pression (100) destiné à réguler une pression à délivrer au niveau d'une ouverture de sortie (105) du dispositif de régulation de pression (100). Le dispositif de régulation de pression (100) comporte un dispositif de guidage de fluide (110) pour conduire un fluide à partir d'une chambre d'entrée (120), qui est pourvue d'une ouverture d'entrée (115) du dispositif de guidage de fluide (110) vers une chambre de sortie (125), qui est pourvue d'une ouverture de sortie (105) du dispositif de guidage de fluide (110), la chambre d'entrée (120) et la chambre de sortie (125) étant reliées l'une à l'autre par un canal (130). En outre, le dispositif de régulation de pression (100) comporte un élément de pression de référence (135) qui comporte une chambre de référence (145), qui est séparée de la chambre de sortie (125) au moyen d'un diaphragme (140), et un élément de fermeture (150), qui est couplé au diaphragme (140), pour l'ouverture commandée d'un passage de fluide à travers le canal (130). En outre, le dispositif de régulation de pression (100) présente une unité de restriction (170) qui est reliée fluidiquement entre l'ouverture de sortie (105) et la chambre de référence (145) et qui est conçue pour réguler la pression à délivrer. L'unité de régulation de pression (100) est destinée en particulier à fournir une augmentation linéaire temporelle d'une pression de sortie en réponse à une variation de pression au niveau de l'entrée ou à une variation de pression au niveau d'un orifice de pression de commande.
PCT/EP2020/074694 2019-09-19 2020-09-04 Dispositif de régulation de pression pour réguler une pression à délivrer au niveau d'une ouverture de sortie du dispositif de régulation de pression, procédé et unité de commande pour produire un dispositif de régulation de pression, et procédé et unité de commande pour faire fonctionner un dispositif de régulation de pression WO2021052775A1 (fr)

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DE102019214296.6A DE102019214296A1 (de) 2019-09-19 2019-09-19 Druckregulierungseinrichtung zum Regulieren eines an einer Ausgangsöffnung der Druckregulierungseinrichtung auszugebenden Drucks, Verfahren und Steuergerät zum Herstellen einer Druckregulierungseinrichtung und Verfahren und Steuergerät zum Betreiben einer Druckregulierungseinrichtung

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Publication number Priority date Publication date Assignee Title
US4629115A (en) * 1984-02-17 1986-12-16 Mpe Produkt Plan Ag Arrangement for measuring the quantity of heat given off by a heating body and for controlling fluid stream passing through the heating body
DE10251981A1 (de) * 2002-11-08 2005-03-03 Pierburg Gmbh Schubumluftventilvorrichtung
US20080023662A1 (en) * 2005-07-07 2008-01-31 Reinicke Robert H Multi-functional regulator
US20140361202A1 (en) * 2013-06-11 2014-12-11 Hamilton Sundstrand Corporation Fault tolerant airflow control system
US20160312913A1 (en) * 2013-12-20 2016-10-27 Imi Hydronic Engineering International Sa A valve and a method of controlling a valve in a fluid conduit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6827100B1 (en) * 1999-08-17 2004-12-07 Belimo Holding Ag Pressure independent control valve
US8245727B2 (en) * 2009-06-26 2012-08-21 Pamela Mooney, legal representative Flow control valve and method of use

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629115A (en) * 1984-02-17 1986-12-16 Mpe Produkt Plan Ag Arrangement for measuring the quantity of heat given off by a heating body and for controlling fluid stream passing through the heating body
DE10251981A1 (de) * 2002-11-08 2005-03-03 Pierburg Gmbh Schubumluftventilvorrichtung
US20080023662A1 (en) * 2005-07-07 2008-01-31 Reinicke Robert H Multi-functional regulator
US20140361202A1 (en) * 2013-06-11 2014-12-11 Hamilton Sundstrand Corporation Fault tolerant airflow control system
US20160312913A1 (en) * 2013-12-20 2016-10-27 Imi Hydronic Engineering International Sa A valve and a method of controlling a valve in a fluid conduit

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