EP2010784B1 - Élément de pompage et pompe comportant un tel élément de pompage - Google Patents

Élément de pompage et pompe comportant un tel élément de pompage Download PDF

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Publication number
EP2010784B1
EP2010784B1 EP07723635A EP07723635A EP2010784B1 EP 2010784 B1 EP2010784 B1 EP 2010784B1 EP 07723635 A EP07723635 A EP 07723635A EP 07723635 A EP07723635 A EP 07723635A EP 2010784 B1 EP2010784 B1 EP 2010784B1
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EP
European Patent Office
Prior art keywords
movable element
pump
movable
movement
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07723635A
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German (de)
English (en)
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EP2010784A1 (fr
Inventor
Heinz KÜCK
Daniel Benz
Frank Wolter
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Hann-Schickard-Gesellschaft fuer Angewandte Forschung eV
Original Assignee
Hann-Schickard-Gesellschaft fuer Angewandte Forschung eV
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Publication of EP2010784A1 publication Critical patent/EP2010784A1/fr
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Publication of EP2010784B1 publication Critical patent/EP2010784B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F04B17/044—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow using solenoids directly actuating the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports

Definitions

  • the present invention relates to a pumping element and a pump having such a pumping element.
  • Pumps according to the state of the art are complex structures which contain the fluidic structure, the drive and optionally a control or regulating device.
  • a disadvantage of the high complexity of the known pumps are the high production costs, which almost preclude the use of such pumps for single use. Furthermore, in complex structures, the effort to achieve a high reliability increases.
  • a fuel piston pump with a Pampelement as defined in the preamble of patent claim 1 is known, which has a pressure valve and a slot control on the suction side and a reciprocating piston.
  • the piston carries at one end a magnet armature and its piston rod is arranged in a cylinder within a magnetic coil.
  • the inlet may be closed during the movement of the first movable element in the direction from the first to the second position, or at least during a majority of this movement, for example by a second movable element.
  • a pump may include a respective pumping element and a drive unit configured to drive the first movable element from the first to the second position and / or to drive the second movable element from the third to the fourth position ,
  • Embodiments of the present invention may relate to miniature pumps or micropumps in which a quantity of fluid pumped per pump stroke is in the microliter range, nanoliter range, or picoliter range.
  • Embodiments of the invention may relate to pumping elements or pumps for liquids, for example, infusion solutions, lubricants, foods or cleaning agents, wherein the pumping element and drive unit may be designed separately.
  • the pumping element can be produced inexpensively, for example, by plastic injection molding and disposed of after use.
  • the drive unit may be reused, in embodiments of the present invention when pumping the drive unit is not in contact with the fluid to be pumped.
  • a quantity of fluid pumped can be determined directly from the number of pump strokes.
  • the pumping element may have an integrated check valve for controlling the fluid flow.
  • the integrated check valve can block fluid flow through the pump element in the non-actuated state of the pump element.
  • Embodiments of the pump according to the invention can be used for a variety of applications, in particular in the fields of medicine, process engineering and research.
  • An example of this are automatic medicament dosage devices in human medicine.
  • fluid to be pumped upon movement of the first movable member in the direction from the second position to the first position, fluid to be pumped is displaced by the first movable member and discharged through the drain. At the same time fluid is sucked through the inlet.
  • This movement phase can thus be referred to as transport phase.
  • transport phase As a result of alternating transport phases and pumping phases, a net flow can thus take place in the direction from the inlet to the outlet.
  • the pumping element may be configured such that upon actuation, the second movable element is moved faster from the third to the fourth position than the first element is moved from the first to the second position.
  • the second movable element in the fourth position closes the inlet.
  • the second spring may have a lower spring constant than the first spring to cause the faster movement of the second movable member.
  • separate drive devices may be provided for the first movable element and the second movable element.
  • a driving device for the second movable member may cause movement thereof from the third position to the fourth position before a driving device causes the movement of the first movable member from the first to the second position.
  • the drive unit and / or the first moveable element and the second moveable element may be configured to exert a greater force on the second moveable element to move faster to the fourth position than the first moveable element in FIG the second position is moved.
  • Embodiments of the present invention enable the fluidic structure of the pumping element and its drive to be constructed separately from each other.
  • the actual pumping element may consist of a few components and can be produced, for example, inexpensively by plastic injection molding.
  • Embodiments of the present invention allow the pumping element to be disposed of after use so that disposable applications are economically possible.
  • the more expensive drive unit which may include a controller, may be used for multiple pumping elements or over multiple pumping element life cycles.
  • the pumping element that is, the fluidic element that comes into contact with the fluid to be pumped, be replaced without having to replace the more expensive drive unit.
  • a pumping function may be performed by two metallic moving elements, for example balls or pistons, which are held in a defined position in a pumping chamber, which may also be referred to as a channel, by two springs.
  • the first movable member closes the drain from the pumping chamber, while the second movable member can release the inlet to the pumping chamber, which may be connected to a reservoir for a fluid to be pumped, the pumping chamber through the Inlet is filled with the fluid.
  • the movable elements can be moved by a magnetic force against the spring force in the second and fourth position.
  • the second movable element first closes the inlet, while the first movable element releases the drain and the fluid, liquid or gas contained in the pumping chamber is pushed past the first movable element (transport phase).
  • the spring pushes back the first movable element, whereby fluid located in front of the first movable element is at least partially conveyed through the backflow.
  • a leakage current arises through the gap between the movable element and the pressure chamber wall through which a certain amount of liquid can flow back during the pumping movement.
  • the magnitude of the leakage current is determined by the gap width between the first movable element and the pumping chamber wall, ie the flow resistance of the flow path between the first movable element and the pumping chamber wall.
  • the first movable element At the end of the pumping movement seals in embodiments of the invention, the first movable element from the process again.
  • the second movable element opens in embodiments of the invention, approximately at the same time the inlet, whereby the housing refills.
  • About number and speed of Pump strokes can be controlled while the metered flow.
  • the pump can block fluid flow without leakage.
  • pumping elements with different flow rates can be realized by the pump design.
  • the cross section of the fluidic structure, i. the pumping chamber channel thereof, the length of the pumping stroke and the size of the gap between the movable member and the channel wall are adjusted to adjust the amount of fluid delivered per pump stroke.
  • pumping elements with different flow rates can be driven with the same drive unit.
  • Embodiments of the present invention also advantageously allow a pump to be implemented without much overhead with a monitoring device that can check the position of the pump, i. which can determine the position of the first movable element and / or, if present, the position of the second movable element.
  • the drive unit may comprise a drive coil, wherein in the drive unit, a further measuring coil can be integrated. By generating a superimposed alternating magnetic field through the drive coil, a voltage in the additional measuring coil can be induced. The induced voltage is dependent on the position of the movable element (s) whose material has a permeability.
  • the position of the pumping element can be determined by a suitable measuring device, whereby a function monitoring of the pump is made possible.
  • Fig. 1a shows a sectional view of an embodiment of a pump according to the invention in a resting state and Fig. 1b shows the pump in an actuated state.
  • the pump comprises a pumping element 10 and a drive unit 12.
  • the pumping element 10 comprises a pumping element housing 14 and the drive unit 12 comprises a drive unit housing 16.
  • the pumping element housing 14 and the drive unit housing 16 are constructed as separate housings. such that they can be coupled together and separated from each other. Suitable devices by means of which the drive unit housing 16 can be reversibly coupled to the pump element housing 14 will be apparent to those skilled in the art and include, for example, snap connections, threaded connections, hooks, clips, hook and loop fasteners, and the like, and need no further explanation herein.
  • the pumping element housing 14 defines a pumping chamber 18, an inlet 20 and a drain 22.
  • the pumping element housing 14 can be realized inexpensively, for example, by plastic injection molding, whereby the inlet 20 and the outlet 22 can be injection-molded.
  • a first ball 24, which constitutes a first movable element and a second ball 26, which constitutes a second movable element.
  • a spring 28 Between the balls 24 and 26 is a spring 28.
  • a second spring 30 Between the second ball 26 and the pump element housing 14 is a second spring 30.
  • the first spring 28 and the second spring 30 are formed as spiral springs.
  • the first ball 24 is positioned by the spring assembly such that the drain 22 is closed with the first ball 24 held in that position by the first spring 28.
  • the second ball 26 is positioned by the spring arrangement so that the inlet 20 is opened and the pumping chamber 18 is filled in the housing 14 with fluid or is.
  • the inlet 20 may be connected via suitable fluid lines to a fluid reservoir (not shown), while the outlet 22 may be connected via suitable fluid lines to a target area (not shown).
  • the inlet 20 and the drain 22 may include luer connector structures 32, for example.
  • a further spring 34 may be provided, for example in the form of a leaf spring, which presses the first ball 24 onto a sealing seat formed by the drain 22.
  • the leaf spring 34 generates a force perpendicular to the force generated by the springs 28 and 30.
  • the balls 12 may be formed, for example, as metallic balls, while the springs may be performed, for example, non-magnetic non-ferrous metal.
  • the drive unit 12 comprises one or more drive coils 40 as an electromagnetic drive for the metallic ball 24, which surround a ferromagnetic core 42.
  • the ferromagnetic core 42 may also be in the form of a yoke with suitable pole pieces at the positions of the movable members, thereby greatly improving the magnetic flux as later referred to Fig. 5 to 7 is explained in more detail.
  • the drive unit 12 further includes a controller 44 coupled to the drive coil (s) 40 for selectively and cyclically impressing current through the one or more coils 40 to thereby generate an electromagnetic force acting on the metallic balls 24 and 26 ,
  • the second ball 26 Due to the generated electromagnetic force, the second ball 26 is moved against the force of the second spring 30 in the direction of the inlet 20, so that the inlet 20 is sealed, as in Fig. 1b is shown.
  • the magnetic force on the ball 24 can be increased as long as the ferromagnetic core 42 and, if present, a yoke are not yet in the magnetic field Saturation is located.
  • the in Fig. 1a is shown in the sealing position, in Fig. 1b is shown to move, this must be moved by a distance s 2 . For this a magnetic force F magnet (s 2 ) is necessary.
  • the outlet 22 is opened and the fluid flows laterally during the movement of the second ball 24 past the latter, ie flows through a flow path between the first ball 24 and the pump element housing 14.
  • the flow force F flow essentially depends on the gap width of the gap the second ball 24 and the pump element housing 14 and from the speed v at which the first ball 24 moves.
  • the spring rates and spring preloads of the springs 14 and 17 may preferably be selected so that after the magnetic force is turned on, the ball 26 first moves and seals the inlet 20 before the ball 24 moves through the fluid and releases the drain 22 , If the magnetic force is turned off, then both balls can move virtually simultaneously, inter alia, because the spring 30 is supported by the inflowing through the inlet 20 fluid.
  • the second ball 26 may have a slightly smaller diameter than the first ball 24.
  • Fig. 2 shows schematically a cross-sectional view along the line II-II in FIG Fig. 1b wherein a corresponding annular gap 46 is shown similar to a technical fit, which provides the flow path between the first ball 24 and the inner pumping chamber wall in a pumping chamber having a circular inner cross section.
  • the gap width of the annular gap can preferably be significantly smaller than the diameter and depend on the diameter of the ball. For example, depending on the diameter of the sphere, the gap width may be less than 100 ⁇ m, less than 50 ⁇ m or less than 20 ⁇ m.
  • the ball is shown centered, wherein actually the position may differ from the position shown depending on the circumstances, that is, for example, the orientation, so that no gap is arranged on one side of the ball.
  • FIG. 3 A schematic cross-sectional view of an alternative embodiment with a pump element housing 14a, which has a round pump chamber cross-section, is shown in FIG Fig. 3 shown.
  • a cylinder-piston-shaped movable element 24a in this case has one or more channels 46a, which result in one or more flow paths between the movable element 24a and the pump element housing 14a, as in FIG Fig. 3 can be seen.
  • four channels 46a are shown, in alternative embodiments a different number of channels, for example only one channel, may be provided.
  • FIG. 1b this shows the arrangement of the pump under the action of a magnetic force of F magnet ⁇ F magnet (s 1 ).
  • the control device 44 is designed to supply the drive coil 40 with such a current that a corresponding magnetic force is exerted on the first ball 24.
  • the second ball 26 releases the inlet 20, so that again new fluid can flow through the inlet 20 into the pumping chamber.
  • the balls 24 and 26 take by the bias of the springs 28 and 30 again in Fig. 1a positions shown.
  • the drive unit can then be actuated again, so that a defined volume of fluid can be pumped by a cyclical actuation of the drive unit by carrying out a specific number of pump cycles per known stroke per pump stroke.
  • the volume pumped is given by the geometry, in particular the size of the ball 24, the size of the pumping stroke (ie the distance s 1 of the movement of the ball 24) and the size of the flow gap 46 between the ball 24 and the pumping element housing 14.
  • the geometry can therefore be adjusted, the volume pumped per pump stroke. Based on the number of pump strokes, the volume delivered can be determined.
  • the Ratio between the pumped amount of fluid for example, amount of liquid and the amount of fluid flowing back through the gap 46 during the pumping movement of the ball 24 is as large as possible.
  • the flow resistance of the gap 46 during the pumping movement be sufficiently large. This can be achieved by a correspondingly narrow gap 46 or additional measures.
  • Fig. 4 a schematic representation of a pump element housing 14b, in which a movable member 24b is arranged.
  • the cross-section of a pump chamber 18a formed in the pumping element housing 14b may, for example, be circular, wherein the movable element 24b may be cylinder-piston-shaped, so that a flow gap 46b is formed between the inner wall of the pump element housing 14b and the movable element 24b.
  • the movable member 24b has a seal member 50 fixed thereto and changing a flow resistance for a fluid to be pumped between the movable member 24b and the passage wall of the pump chamber housing 14b depending on the direction of movement.
  • the sealing element 50 is designed as a limp and is suitable, for example, to be connected only via a pin 52 with the movable element 24b.
  • the sealing element 50 thus provides in a movement of the movable element 24 b in Fig. 4 to the right for a fluid flowing past a lower flow resistance than in a movement of the movable element 24b in Fig. 4 to the left.
  • the seal member provides greater flexibility in moving to the right as it can be deflected away from the movable member 24b while being pushed leftward against the same upon movement of the movable member 24b.
  • the movable element here has an additional valve function.
  • the additional sealing element 50 can be made of any elastic material, for example rubber, which changes its fluidically effective geometry depending on the direction of movement of the movable element 24b and thus allows a change in the flow resistance in order to be able to produce a desired valve function in this way.
  • FIG. 5 An alternative embodiment for achieving a dynamic valve action of a movable element is shown in FIG Fig. 5 shown schematically.
  • Fig. 5 again schematically shows a pumping element housing 14c and a movable element 24c disposed therein.
  • pole pieces 56 and 58 of a magnetic drive unit in Fig. 5 shown pole pieces 56 and 58 of a magnetic drive unit.
  • the movable member 24 c is in the in Fig. 5 shown embodiment, in dependence on its position and position in the flow channel, ie in the pumping element housing 14c formed in the pumping channel 18b, causes a different flow resistance of a fluidic gap 46c.
  • this can be achieved by superimposing a translatory movement 60 of the movable element 24c through a rotational movement, by means of which the fluidic gap 46c increases or decreases, so that different flow resistances are produced.
  • the element 24c may be, for example, a ball flattened on two or more sides, which may rotate about its central axis.
  • the movable member 24 c may be made of a permanent magnetic material, so that a rotation of the movable member 24 c takes place when it is moved by the translational movement 60 between the pole pieces 56 and 58, as indicated by dashed lines in Fig. 5 is indicated.
  • the cross-section of the gap 46c may decrease during the pumping movement of the movable member 46c toward the pump outlet and increase during the loading movement in the direction away from the pump outlet, whereby a dynamic valve action can be achieved.
  • Fig. 6a and 6b show a further embodiment of a pump according to the invention, a modification of the in the Fig. 1a and 1b illustrated embodiment, with an explanation and description of the already reference to the Fig. 1a and 1b described elements and functionalities is omitted.
  • a drive unit 12a differs from the reference to FIGS Fig. 1a and 1b described embodiments in that a detection device is provided for determining a position of the balls.
  • This detection device comprises a detection coil 70 and a detection device 72.
  • the detection device 72 can be integrated in the control device 44 or can be provided separately therefrom.
  • the detection device 72 is coupled to the detection coil 70 and may be further coupled to the drive coil 40.
  • Either the control device 44 or the detection device 72 are designed to send such a changing current through the drive coil 40 that a changing magnetic field, for example an alternating magnetic field, is superimposed, the change of which induces a voltage U ind in the detection coil 70. Due to the permeability of the material of the balls 24 and 26, this voltage also changes depending on the position of the balls in the pumping element.
  • the detection device 72 is designed to detect the voltage U ind and to evaluate changes thereof in order to draw conclusions about the position of the balls in the pump element.
  • the position of the balls 24 and 26 within the pumping element can be 10 so that the position and function of the pumping element can be monitored.
  • it is again possible to amplify the measurement signal which is represented by the voltage induced in the coil 70 by means of a magnetic yoke in the form of a yoke and pole shoes positioned thereon.
  • the Fig. 7 to 8 each show a pumping element having a pumping element housing 80 in which a pumping chamber 82, an inlet 84 and a drain 86 are formed.
  • a first movable ball 88 and a second movable ball 90 are arranged, which are biased by a first spring 92 and a second spring 94 in the positions shown.
  • the drive units 102a and 102b may have a similar construction, wherein respective features of the drive unit 102a are marked with the letter "a", while features of the drive unit 102b are marked with the letter "b".
  • the drive units have drive unit housing parts 104a and 104b, which can be reversibly coupled to the pumping element.
  • the drive unit 102a has one or more drive coils 106a and one or more sense coils 108a.
  • the drive unit 102b has one or more drive coils 106b.
  • the drive unit 102a has a control device 44a and a detection device 72.
  • the drive unit 102b also has a control device 44b and can optionally furthermore also comprise one or more detection coils and a detection device.
  • the drive coils 106a and 108a are wound around a ferromagnetic yoke 110a
  • the drive coils 106b are wound around a ferromagnetic yoke 110b.
  • Pole shoes 112a and 114a which guide the magnetic flux such that the ball 88 is pulled between the pole pieces 112a and 112b when actuated, are attached to the ferromagnetic yoke 110a.
  • Pole shoes 112b and 114b are also attached to the yoke 110b, which guide the magnetic flux such that in the actuated state the ball 90 is pulled between the pole shoes 112b and 114b.
  • the movable elements in the illustrated embodiments, balls 88 and 90 become part of the magnetic circuit, whereby the acting magnetic forces can be significantly larger. Furthermore, the measurement signal induced in the detection coil 108a and detected by the detection device 72 can thereby be significantly stronger.
  • the structural design of the yokes and pole shoes depends on the particular design of the pumping element. It should be noted at this point that the geometric configuration of the pumping elements shown in the exemplary embodiments is purely exemplary for illustrative purposes. It should also be noted that the inlets and outlets can be arranged at a suitable position, wherein in particular the position of the inlet into the FIGS. 7 and 8 is purely schematic and of course at a suitable location to allow a flow of a fluid, ie a liquid or a gas, into the pumping chamber.
  • the functionality of in Fig. 7 may substantially correspond to the functionality of the above with reference to FIGS Fig. 1a and 1b correspond to described embodiment.
  • the spring constants of the springs 92 and 94, the timing of impressing a current into the drive coils 106a and 106b and / or the magnitude of the current impressed into the drive coils 106a and 106b (and the magnetic field generated thereby) may be adjusted to effect in that, when actuated, the ball 90 closes the inlet 84 before the ball 88 is moved from the position shown to the actuated position.
  • Fig. 8 shows a schematic view of an embodiment in which a common drive unit for the first ball 88 and the second ball 90 is provided.
  • the drive unit 120 has a drive unit housing 122, which in turn is reversibly coupled to the pumping element.
  • the drive unit further comprises a control device 44 and a detection device 72 which, in analogy to the above descriptions, are coupled to one or more drive coils 106 and one or more detection coils 108.
  • the drive coil 106 and the detection coil 108 are wound around a yoke 110, which may be made of a ferromagnetic material, as shown.
  • the yoke 110 has first pole shoes 124 and 126 for guiding the magnetic flux for actuating the first ball 88 and second pole shoes 128 and 130 for conducting the magnetic flux for actuating the second ball 90.
  • Fig. 8 shown embodiment can be made to the above statements with respect to Fig. 1a, 1b . 6a and 6b can be referenced, in turn, through the yoke 110 and attached to the same pole pieces, a gain of the magnetic force and the measurement signal can be achieved.
  • FIG Fig. 9 An alternative embodiment of a drive unit 140 for actuating both balls 88 and 90 is shown in FIG Fig. 9 shown.
  • the drive unit 140 comprises a drive unit housing 142, in which in turn a control device 44, a detection device 72, one or more drive coils 106 and one or more detection coils 108 are arranged.
  • the drive coil 106 and the detection coil 108 on a yoke 144 which is arranged between pole pieces 124, 126, 128 and 130, is provided.
  • This in Fig. 9 shown embodiment therefore allows a very compact design of the drive unit, which in turn is reversibly coupled to the pump element housing.
  • Fig. 10 shows a pumping element 150 according to an alternative embodiment.
  • the pumping element 150 comprises a pumping element housing 152 in which in turn a pumping chamber 154, an inlet 156 and a drain 158 are formed.
  • the pumping element 150 further includes a first ball 160, a second ball 162, a first spring 164 and a second spring 166. Between the springs, a spring stop 168 is arranged. The springs 164 and 166 bias the balls 160 and 162 to the position shown in FIG Fig. 10 is shown before.
  • the ball 160 may be moved away from the drain 158 against the force of the spring 164 to open it and to transport fluid past it while the inlet 156 is closed by the ball 162 .
  • pole shoes can in turn be displaced somewhat from the ball 160 in the direction of the inlet 156.
  • the spring 164 drives the ball back to the position in Fig. 10 shown, wherein fluid is driven from the drain 158.
  • the ball 162 forms together with the spring 166 while a check valve, which allows running of fluid through the inlet 156.
  • the spring 166, the ball 162 and the sealing seat on the inlet 156 can be coordinated so that the check valve thus formed immediately opens in the direction of passage when the ball 160 is in the pumping movement to the outlet 158 out, and in the reverse direction immediately closes when the ball 160 is in the loading motion away from the drain 158.
  • the spring 164 together with the ball 160 thus forms the pump drive, wherein the spring 164 and the sealing seat of the ball 160 and the pump housing 152 and the outlet 158 can be tuned by the same so that the outlet 158 through the element 160 is reliably sealed, as long as the magnetic drive is switched off, ie as long as the system is at rest.
  • a quiescent flow from the inlet 156 through the outlet 158 can likewise be effectively excluded, as can a return flow from the outlet 158 back to the inlet 156.
  • the springs 164 and 166 are decoupled and are based on a fixed stop 168 from.
  • the two spring forces are determined solely by the distance between the ball 160 and the spring stop 168 or between the ball 162 and the spring stop 168 and are thus completely decoupled from each other.
  • an additional magnetic drive could be provided for the ball 162 which is controllable independently of the magnetic drive for the ball 160.
  • embodiments of the present invention thus provide a pump for fluids having a first one Housing and with an inlet and a drain and a second housing, which can be mechanically connected to the first housing detachably.
  • the first housing may include a first movable member and at least one first spring, the first spring defining the first movable member in a position that seals the drain.
  • the housing may include a second movable member and at least one second spring, the second spring defining the second movable member in a position that releases the inlet.
  • the second housing may include at least one coil, a ferromagnetic core, and a controller for generating a magnetic field and thereby defining the movable members against the acting force of the springs in a second position, the inlet being sealed by the second movable member and the flow is released by the first movable element.
  • the movable elements can be returned to the rest position by the springs so that fluid contained in the first housing is at least partially conveyed out of the drain.
  • Embodiments of the present application comprise, as described above, two movable elements.
  • both movable elements are actuated by a drive unit.
  • only the first movable element is drivable by a drive unit, while the other movable element can be effective as a check valve and is driven substantially only by an inflowing fluid.
  • the inlet could also be provided with a conventional non-return valve, for example a flapper valve which opens the inlet during the pumping movement of the first movable element and during the transport movement, with the fluid past the first movable element is transported, closes the inlet.
  • the inlet need not be provided with a valve, as long as the flow resistance of the first movable member through the inlet is greater than the flow resistance between the first movable member and the inner pumping element housing wall, as in such a case still a net pumping effect by the Sequence can be effected.
  • Housing parts of the pump element housing may advantageously consist of plastic and be produced, for example, using the injection molding technique.
  • the housing parts may also be made using other suitable materials, for example by microstructuring techniques using semiconductor or ceramic materials or non-ferromagnetic metals.
  • the one or more movable elements may advantageously be made of a ferromagnetic, soft magnetic or permanent magnetic material.
  • the first movable element may be permanent magnetic and designed as a magnetic dipole, wherein the magnetic axis of the dipole is oriented such that the movable element performs a rotational movement in addition to the translational nor upon application of an external magnetic field generated by a drive unit
  • the first movable element is positioned in the pumping element housing in such a way that its fluidically effective geometry is changed in the sense of a valve, as described above with reference to FIG Fig. 5 was explained.
  • Described embodiments of the present invention include movable members that are in the form of a ball or a piston.
  • the movable element (s) may have any shapes that provide the functionality described in conjunction with a corresponding pumping element housing.
  • a sealing element which may consist of an elastic material and its fluidic effective geometry in response to the direction of movement of the movable member changes, wherein the movable member in conjunction with the sealing element has a valve function with the aid of which the ratio of the amount of fluid pumped out and the amount of fluid that has flowed back through the flow path between the movable element and the pump element housing during the pumping movement can be increased.
  • the springs biasing the first movable member in position and / or the second movable member to the third position may be made of any suitable material, such as non-magnetic non-ferrous metal.
  • the drive unit is formed in a separate housing such that it can be placed on different pump element housing, so that a plurality of pump types can be controlled with a drive unit.
  • the rate of delivery of the pump during operation may be adjusted by changing the pumping frequency or by varying the pumping stroke of the first movable element.
  • the pump frequency may be adjusted in embodiments of the invention by changing the frequency at which a current is impressed into the drive coil by the controller.
  • the pumping stroke of the first movable member may be varied by changing the impressed current and thereby changing the generated magnetic force.
  • the delivery rate may be varied by varying the gaps between the first movable member and the pumping element housing and varying the spring preload F be set before, for example, in advance in the design of the pump.
  • a defined amount of fluid is pumped per pump stroke.
  • a correspondingly necessary number of pumping strokes can thus be counted and carried out.
  • the magnetic flux can be selectively directed into the one or more movable elements.
  • the magnetic flux through the balls can be adjusted in a targeted manner.
  • a magnetic drive can be made up of two substantially identical units, each unit having its own control device and thus being able to control one of the movable elements individually.
  • the magnetic drive may consist of one unit, wherein a magnetic flux is simultaneously introduced into both movable elements via a ferromagnetic yoke and pole shoes.
  • the magnetic drive may consist of a unit, wherein a ferromagnetic yoke is made in two parts with pole shoes attached thereto, the drive coils being mounted in the region between the two movable elements on the yoke.
  • the second housing having the drive unit, a further coil and a detection device, in which on the drive coil, an alternating magnetic field is superimposed, which in the further coil, a voltage is induced, which is measured and evaluated by the detection device, wherein the induced voltage in the further coil depends on the position of the movable elements in the pump element housing and wherein the detection device, the position of the movable elements and thus the position and function can determine the pump.
  • the first movable element closes the drain when in the first position
  • the drain may not be completely closed when the first movable element is in the first position, still achieving a net pumping action can be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (15)

  1. Elément de pompage (10; 150), aux caractéristiques suivantes:
    un boîtier d'élément de pompage (14; 14a; 14c; 80; 152) définissant une chambre de pompage (18; 82; 154);
    un conduit d'amenée (20; 84; 156) vers la chambre de pompage;
    un conduit de sortie (22; 86; 158) de la chambre de pompage;
    un premier élément mobile (24; 24a; 24b; 24c; 88; 160) qui est déplaçable dans la chambre de pompage entre une première et une deuxième position,
    lors d'un déplacement du premier élément mobile dans le sens de la première à la deuxième position, une résistance à l'écoulement d'un trajet d'écoulement du premier élément mobile dans le conduit d'amenée étant supérieure à une résistance à l'écoulement d'un trajet d'écoulement (46; 46a; 46b; 46c) entre le boîtier d'élément de pompage et le premier élément mobile, et
    lors d'un déplacement du premier élément mobile dans le sens de la deuxième position à la première position, une résistance à l'écoulement d'un trajet d'écoulement du premier élément mobile dans le conduit de sortie étant inférieure à une résistance à l'écoulement du trajet d'écoulement entre le boîtier d'élément de pompage et le premier élément mobile,
    de sorte que lors d'un déplacement en va-et-vient du premier élément mobile entre la première et la deuxième position ait lieu un écoulement net dans le conduit de sortie,
    caractérisé par le fait que le premier élément mobile (24; 24a; 24b; 24c; 88; 160) obture le conduit de sortie lorsqu'il se trouve dans la première position.
  2. Elément de pompage selon la revendication 1, présentant un deuxième élément mobile (26; 80; 162) par lequel peut être varié la résistance à l'écoulement du trajet d'écoulement du premier élément mobile (24; 24a; 24b; 24c; 88; 160) dans le conduit d'amenée (20; 84; 156).
  3. Elément de pompage selon la revendication 2, dans lequel le boîtier de chambre de pompage (14; 80) contribue à la fixation d'un trajet pour un déplacement du deuxième élément mobile (26; 80) d'une troisième position à une quatrième position, où, lorsque le deuxième élément mobile se trouve dans la troisième position, la résistance à l'écoulement du trajet d'écoulement du premier élément mobile dans le conduit d'amenée est inférieure à celle lorsque le deuxième élément mobile se trouve dans la quatrième position.
  4. Elément de pompage selon l'une des revendications 1 à 3, dans lequel la résistance à l'écoulement du trajet d'écoulement (46b; 46c) entre le boîtier d'élément de pompage (14b; 14c) et le premier élément mobile (24b; 24c) lors du déplacement du premier élément mobile dans le sens de la première à la deuxième position est inférieure à celle lors du déplacement du premier élément mobile de la deuxième à la première position.
  5. Elément de pompage selon la revendication 4, dans lequel le premier élément mobile (24c) présente une première position et une deuxième position, la résistance à l'écoulement du trajet d'écoulement entre le boîtier d'élément de pompage (14c) et le premier élément mobile (24c) étant, dans la première position, inférieure à celle dans la deuxième position.
  6. Elément de pompage selon la revendication 4, dans lequel le premier élément mobile (24b) présente un élément d'étanchéité flexible (50) qui, lors du déplacement de la première position à la deuxième position, offre une première flexibilité et, lors du déplacement de la deuxième position à la première position, une deuxième flexibilité qui est inférieure à la première flexibilité.
  7. Elément de pompage (10; 150) selon la revendication 1, présentant par ailleurs les caractéristiques suivantes:
    un deuxième élément mobile (26; 80; 162) qui est déplaçable, dans la chambre de pompage, entre une troisième et une quatrième position;
    un premier ressort (28; 92; 164), qui prétend le premier élément mobile dans la première position; et
    un deuxième ressort (30; 94; 166), qui prétend le deuxième élément mobile dans la troisième position,
    lors d'un déplacement en va-et-vient du premier élément mobile entre la première et la deuxième position et du deuxième élément mobile entre la troisième et la quatrième position ayant lieu un écoulement net dans le conduit de sortie.
  8. Elément de pompage selon la revendication 7, dans lequel le premier et le deuxième ressort (164, 166) sont disposés entre le premier et le deuxième élément mobile (160, 162), et dans lequel une butée de ressort (168) est disposée entre le premier et le deuxième ressort,
    le conduit d'amenée (156) étant obturé lorsque le deuxième élément mobile (162) se trouve dans la troisième position et dans lequel le conduit d'amenée (156) est ouvert lorsque le deuxième élément mobile (162) se trouve dans la quatrième position.
  9. Pompe avec un élément de pompage (10; 150) selon l'une des revendications 1 à 8 et une unité d'entraînement (12; 12a; 102a, 102b; 120; 140) qui est conçue de manière à entraîner le premier élément mobile de la première à la deuxième position.
  10. Pompe selon la revendication 9, dans laquelle l'unité d'entraînement (12; 12a; 102a, 102b; 120; 140) et l'élément de pompage (10; 150) sont construits séparément et peuvent être couplés l'un à l'autre de manière réversible, l'unité d'entraînement (12; 12a; 102a, 102b; 120; 140) et l'élément de pompage (10; 150) étant conçus de sorte que, lors du pompage, l'unité d'entraînement n'entre pas en contact avec un fluide à pomper.
  11. Pompe selon l'une des revendications 9 ou 10, dans laquelle l'unité d'entraînement (12; 12a; 102a, 102b; 120; 140) présente un dispositif pour générer un champ magnétique par lequel le premier élément mobile (24; 24a; 24b; 24c; 88; 160) est amené dans la deuxième position, et dans laquelle le premier élément mobile présente un matériau ferromagnétique, magnétique doux ou magnétique permanent.
  12. Pompe selon la revendication 11 avec un élément de pompage selon la revendication 7, dans lequel le dispositif pour générer un champ magnétique présente un premier dispositif (106a) pour générer un champ magnétique par lequel le premier élément mobile (88) est amené dans la deuxième position, et un deuxième dispositif (106b) pour générer un champ magnétique par lequel le deuxième élément mobile (90) est amené dans la quatrième position, le premier et le deuxième dispositif pour générer un champ magnétique pouvant être activés séparément.
  13. Pompe selon l'une des revendications 9 à 12, présentant par ailleurs un dispositif (70, 72; 108; 108a, 108b) pour capter la position du premier élément mobile.
  14. Procédé pour régler le débit de refoulement d'une pompe selon l'une des revendications 9 à 13, présentant au moins l'une des étapes suivantes:
    régler une fréquence selon laquelle le premier élément mobile est déplacé en va-et-vient;
    régler la course de déplacement du premier élément mobile entre la première et la deuxième position;
    régler la résistance à l'écoulement du trajet d'écoulement entre le premier élément mobile et le boîtier d'élément de pompage; et
    modifier une prétension de ressort qui prétend le premier élément mobile dans la première position.
  15. Procédé pour faire fonctionner une pompe selon l'une des revendications 9 à 13, dans lequel, lors d'un déplacement en va-et-vient de l'élément mobile, une quantité de fluide connue est sortie du conduit de sortie, un nombre de déplacements en va-et-vient du premier élément mobile étant compté pour sortir une quantité de dosage définie dans le conduit de sortie.
EP07723635A 2006-07-05 2007-03-27 Élément de pompage et pompe comportant un tel élément de pompage Not-in-force EP2010784B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006010726 2006-07-05
PCT/EP2007/002689 WO2008003359A1 (fr) 2006-07-05 2007-03-27 Élément de pompage et pompe comportant un tel élément de pompage

Publications (2)

Publication Number Publication Date
EP2010784A1 EP2010784A1 (fr) 2009-01-07
EP2010784B1 true EP2010784B1 (fr) 2009-09-30

Family

ID=38806174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07723635A Not-in-force EP2010784B1 (fr) 2006-07-05 2007-03-27 Élément de pompage et pompe comportant un tel élément de pompage

Country Status (12)

Country Link
US (1) US8241019B2 (fr)
EP (1) EP2010784B1 (fr)
JP (1) JP2009541647A (fr)
CN (1) CN101484700B (fr)
AT (1) ATE444444T1 (fr)
BR (1) BRPI0712630A2 (fr)
CA (1) CA2656624C (fr)
DE (2) DE502007001643D1 (fr)
ES (1) ES2333178T3 (fr)
MX (1) MX2008015894A (fr)
RU (1) RU2397365C1 (fr)
WO (1) WO2008003359A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2392633T3 (es) * 2008-09-08 2012-12-12 Converteam Technology Ltd Conjuntos de elementos apilados que contienen dispositivos semiconductores
MX2013012930A (es) * 2011-05-06 2014-05-28 Electrolux Home Prod Corp Montaje de bomba reciprocante para liquidos.
DE102011111926A1 (de) * 2011-08-31 2013-02-28 Thomas Magnete Gmbh Elektromegnetische Pumpe
US8991649B2 (en) 2012-01-05 2015-03-31 Gojo Industries, Inc. Keyed dispensing systems and related methods

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Publication number Priority date Publication date Assignee Title
GB1144142A (en) * 1965-03-13 1969-03-05 Walter Eberspacher Reciprocating fuel pump, particularly for oil-fired furnaces
AU446929B2 (en) 1972-11-07 1974-04-04 Gunweb Limited Direct drive ball piston compressor
US3841798A (en) * 1973-03-01 1974-10-15 Odell Mfg Inc Electromagnetic self-priming pump
JPS54127609U (fr) * 1977-07-28 1979-09-05
JPH0341098Y2 (fr) * 1980-12-29 1991-08-29
DE3233240A1 (de) 1982-09-04 1984-03-08 Max Prof. Dr.-Ing. 8520 Erlangen Schaldach Kolbenpumpe
US4599054A (en) * 1984-08-23 1986-07-08 Spears Harry L Travelling valve assembly for a fluid pump
DE3707764C1 (de) * 1987-03-11 1988-04-28 Eberspaecher J Durch einen Elektromagneten betaetigte Brennstoffkolbenpumpe
JPH0337288U (fr) 1989-08-23 1991-04-11
US5346369A (en) * 1993-12-16 1994-09-13 Miller Jr William L Bilge pump actuated by wave motion
JPH08114178A (ja) * 1994-10-17 1996-05-07 Toyo Ink Mfg Co Ltd 可逆パルスポンプ
JP2000199477A (ja) * 1998-12-28 2000-07-18 Furukawa Co Ltd ダブルピストンポンプ
JP2000220570A (ja) 1999-01-28 2000-08-08 Tokico Ltd プランジャポンプおよびこれを用いたブレーキ装置
CN1133810C (zh) * 2001-02-16 2004-01-07 郗大光 电动燃油喷射装置
US7107837B2 (en) 2002-01-22 2006-09-19 Baxter International Inc. Capacitance fluid volume measurement
DE60334557D1 (de) * 2002-11-01 2010-11-25 Danfoss As Kolbenflüssigkeitspumpe zur zufuhr von flüssigem brennstoff zueiner haushalts-brennervorrichtung
JP2005054721A (ja) * 2003-08-06 2005-03-03 Taisan Kogyo Kk 電磁ポンプ装置
US7594525B2 (en) 2004-02-13 2009-09-29 Intelligent Coffee Company, Llc Replaceable concentrate/extract cartridge for a liquid concentrate/extract beverage dispenser
US7651015B2 (en) * 2004-02-13 2010-01-26 Intelligent Coffee Company, Llc Liquid concentrate/extract beverage dispenser with replaceable concentrate/extract cartridge

Also Published As

Publication number Publication date
US20090180905A1 (en) 2009-07-16
CN101484700A (zh) 2009-07-15
ATE444444T1 (de) 2009-10-15
ES2333178T3 (es) 2010-02-17
CA2656624A1 (fr) 2008-01-10
CA2656624C (fr) 2011-09-13
WO2008003359A1 (fr) 2008-01-10
JP2009541647A (ja) 2009-11-26
DE502007001643D1 (de) 2009-11-12
BRPI0712630A2 (pt) 2012-10-23
RU2397365C1 (ru) 2010-08-20
EP2010784A1 (fr) 2009-01-07
CN101484700B (zh) 2011-07-20
US8241019B2 (en) 2012-08-14
DE102007014688A1 (de) 2008-01-10
MX2008015894A (es) 2009-03-06

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