EP3336352A1 - Spule für elektromagnetische pumpe - Google Patents

Spule für elektromagnetische pumpe Download PDF

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Publication number
EP3336352A1
EP3336352A1 EP16204506.6A EP16204506A EP3336352A1 EP 3336352 A1 EP3336352 A1 EP 3336352A1 EP 16204506 A EP16204506 A EP 16204506A EP 3336352 A1 EP3336352 A1 EP 3336352A1
Authority
EP
European Patent Office
Prior art keywords
coil
core
loop
winding
overmolding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16204506.6A
Other languages
English (en)
French (fr)
Inventor
Vincent NANCHEN
Frédéric Dayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GOTEC SA
Original Assignee
GOTEC SA
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 GOTEC SA filed Critical GOTEC SA
Priority to EP16204506.6A priority Critical patent/EP3336352A1/de
Priority to CN201711339345.XA priority patent/CN108231320B/zh
Publication of EP3336352A1 publication Critical patent/EP3336352A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • 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
    • 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
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
    • 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
    • F04B53/125—Reciprocating valves
    • F04B53/129—Poppet valves
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/098—Mandrels; Formers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/083—External yoke surrounding the coil bobbin, e.g. made of bent magnetic sheet

Definitions

  • the present invention relates to the field of electromagnetic pumps and coils for electromagnetic pumps.
  • an electromagnetic pump 5 is illustrated on the figure 10 .
  • the illustrated pump comprises a fluid supply duct 6 upstream of the pump, a fluid outlet duct 7 downstream of the pump, and a movable piston 8 between the two ducts.
  • An electromagnetic coil 2 creates a magnetic field that moves the piston 8 in a cylinder 302, against the action of a spring 9, to produce a pumping movement. Examples of such pumps are described for example in patent applications WO2013152975 and WO2014177442 in the name of the plaintiff.
  • a first type of coil 1 of the prior art for an electromagnetic pump is illustrated on the Figures 1 to 3 .
  • the illustrated coil comprises a winding 2 formed by a conductive wire wound around a hollow cylindrical support and whose outer surface is protected by a varnish or an insulator.
  • a ferromagnetic frame (or yoke) creates a magnetic path around this coil; it comprises a core 30 formed of a sleeve 30 illustrated on the figure 3 , and a loop 31.
  • the loop is used to close the magnetic circuit at both ends of the core 30.
  • the core 30 is inserted into an axial hole 312 through two sides of the loop and through the coil. It comprises an axial opening 302 serving as a cylinder and in which a piston can slide to move the pumped fluid.
  • the frame is formed of a sheet folded and closed on itself, as illustrated on the figure 2 .
  • the magnetic field in this frame creates eddy currents which produce a rapid heating of this frame, and a deterioration of its performances.
  • the type of coils shown on the Figures 1 to 3 is intended to be used for intermittently used pumps, with pumping times that typically do not exceed one minute; they must then stop to cool, or continue to operate with less efficiency.
  • FIGS. Figures 4 to 5 An example of a coil 1 of the prior art for an electromagnetic pump and suitable for longer durations of use is illustrated in FIGS. Figures 4 to 5 .
  • the frame 31 is made by laminating sheets parallel to the axis of the coil, which greatly reduces the eddy currents and the heating. This coil is therefore also suitable for pumps used continuously or for long periods.
  • the laminated frame 31 figures 4 and 5 is typically made by assembling two E elements, which are commercially available.
  • the shorter intermediate branch of the two elements forms a core 30 providing an air gap in the central branch, in order to increase the reluctance of the coil and to delay the saturation.
  • the size and position of this air gap must be precisely controlled according to the desired application. However, they depend on a precise positioning of the two half-frames against each other, which is difficult to guarantee in a reproducible manner.
  • the drilling of the axial hole 302 for the passage of the piston through the central branch of the frame (core) is difficult, especially when the edges of this hole must be coated to ensure the tightness of the cylinder or to avoid the risk of contamination of the pumped liquid. For all these reasons, the manufacture of electromagnetic pumps with a laminated frame is more expensive than manufacturing from a folded sheet frame.
  • the reel illustrated on these Figures 4 to 5 comprises a winding protected by a cover or a molding having a substantially square section in the transverse plane.
  • This square shape facilitates the mounting of the pump which can be placed or fixed in a housing of corresponding shape, without the risk of accidental pivoting.
  • the core 30 illustrated in the embodiment of figures 4 and 5 also has a rectangular section. It is indeed difficult to achieve a laminated core with a circular section. This square section core fills only a portion of the cylindrical opening in the coil. This results in a reduced section core, which heats up unnecessarily, and parasitic magnetic flux in the gap between the core 30 and the opening through the coil.
  • the coils of these two examples are therefore suitable for different applications, for example rather inexpensive electromagnetic pumps, operating intermittently or with a low efficiency, in the example of Figures 1 to 3 , and more expensive electromagnetic pumps, able to operate for longer periods with less heating, in the case of Figures 4 to 5 .
  • Each of these types of pumps must also be produced according to different specifications depending on the intended application.
  • electromagnetic pumps are frequently used for oil-burning applications, condensate removal in air-conditioning coolers, coffee dispensers such as coffee machines, pressurized water cleaning equipment, etc. .
  • These devices require different trade-offs between size, ease of assembly, and price.
  • the necessary pumping power, the duration of use, the stroke of the piston which must be performed with each pumping movement, the type of liquid to be pumped vary by application.
  • a large number of different coils must therefore be made in order to propose electromagnetic pumps adapted to these varied needs. The manufacture and distribution of such a large number of models is expensive and complex.
  • Another object of the present invention is to provide an electromagnetic pump coil for low cost and low heating.
  • Another object of the invention is to provide a coil manufacturing method for electromagnetic pump at low cost and low temperature.
  • an electromagnetic pump coil comprising a winding constituted by a conductive wire wound around a hollow cylindrical support; a frame of ferromagnetic material comprising on the one hand a core provided with a cylindrical opening and passing through said winding, and on the other hand a loop around the winding to close the magnetic circuit between the two ends of this core; the section of the core in a plane perpendicular to its axis being circular, the loop having four branches forming a rectangle, the section of the branches being rectangular, the core being removable.
  • the section of the core in a transverse plane is circular, which allows it to completely fill the cylindrical volume inside the hollow cylindrical support. This reduces the parasitic magnetic flux between the core and the turns, as well as the heating problems due to a larger volume of the core.
  • the section of the branches of the rectangular loop facilitates the manufacture, and facilitate assembly and integration into an existing assembly, for example by screwing accessories.
  • the loop advantageously comprises four branches forming a hollow rectangle. It is thus possible to make it easily in one piece, without assembly needs from half-loops.
  • the frame thus has an unusual shape with a central core of circular section and passing through a rectangular loop and rectangular section.
  • the removable core can be made independently of the loop. It is thus possible to use other materials and other manufacturing processes, to achieve a precise air gap without increasing the entire frame.
  • the loop of the frame can be laminated, for applications where the production of heat should be reduced as much as possible.
  • the loop of the frame may be formed of a folded sheet closed on itself. Sufficient heat removal for many applications can nevertheless be achieved by the cooling fins.
  • a same winding can be equipped with the choice of a laminated loop or a loop formed of a folded sheet. It is thus possible to make a set of identical windings and to choose at the last moment during the manufacturing process which loop should be used, depending on the application.
  • At least one of the branches of the loop is provided with a through hole along the axis of the coil.
  • the core may be a hollow cylindrical socket inserted in this hole.
  • the core may comprise two hollow cylindrical ferromagnetic material housings arranged coaxially and separated from each other by a coaxial sleeve of non-ferromagnetic material forming an air gap.
  • the winding may comprise an overmoulding of synthetic material around the winding, and the outer surface of which forms radial cooling fins.
  • This construction is advantageous because the overmoulding provided with cooling fins makes it possible to effectively remove the heat released by the coil and the eddy currents in the core and the loop of the frame. It is therefore possible to use a simpler loop, for example a folded sheet metal loop, and less bulky, while avoiding or reducing the problems of heat release that these loops had in the prior art. This makes it possible to reduce the number of types of coils required, since coils with a single loop can, at least for certain applications, be implemented where in the prior art laminated loops were imperatively necessary to reduce the release of heat. .
  • the section of overmolding in a plane perpendicular to the axis of the core substantially corresponds to a square with rounded corners. It exploits advantageously the volumes in at least some corners of the winding, which are used to have cooling fins longer than in the edges of this winding.
  • the overmolding and the hollow cylindrical support can form an integral assembly, that is to say a single closed plastic part which completely covers the coils of the coil, also protecting it from moisture.
  • the overmolding may comprise a housing for a hot melt or a thermoswitch protective winding.
  • the overmolding may comprise a housing for a removable connector for the electrical connection of the coil.
  • These housings can be provided in a corner of the overmolding.
  • the invention also relates to an electromagnetic pump comprising such a coil and a piston movable through said core.
  • the method may include a step of overmoulding a synthetic material around the coil, the outer surface forming radial cooling fins. Thanks to this overmoulding, the coil can be used in a large number of different applications, including applications involving long-term operation.
  • the method may also include inserting a thermofusible or a winding protection thermoswitch into a housing of the overmolding.
  • the method may also include the insertion of a removable connector for the electrical connection of the coil in a housing overmoulding.
  • At least two types of frame loops are provided, including a laminated loop and a non-laminated loop. It is thus possible to choose the type of loop among these types, and to make different coils and electromagnetic pumps from the same winding.
  • the modular construction with interchangeable loops and cores around a universal winding makes it possible to satisfy very different applications starting from a single overmolded winding.
  • the kit may also include overmoulding of synthetic material around the winding, and the outer surface of which forms radial cooling fins.
  • the figure 6 illustrates a conductive wire 20 wound around a hollow cylindrical support 21 of insulating synthetic material. This element is intended to be overmoulded to serve as winding in the coil described below.
  • the figure 7 illustrates the same element as that of the figure 6 , but covered with an overmoulding 4 which completely surrounds the conductor wire protecting it and avoiding the risk of electrocution.
  • the section of overmolding 4 in the plane transverse to the longitudinal axis a of the coil corresponds substantially to a square with rounded corners, although the section of the portion of overmolded wire is substantially circular.
  • the overmolded edges are provided with radial cooling fins 40. The length of these fins is longer in at least two angles 41 than in the middle edges 42, so as to exploit the volume available between the corners of the square and the conductor volume.
  • a first housing 43 is provided for a hot melt or a removable thermoswitch that protects the driver in case of excessive current.
  • a second housing 44 is provided for electrical connectors for powering the winding.
  • the conductive wire 20 in the overmoulding is connected in series to the terminals of the hot-melt or thermoswitch in the housing 43 and the connection lugs in the housing 44.
  • the housing 44 is preferably waterproof and prevents infiltration of water or moisture inside the overmoulding.
  • An axial hole passes through the overmolded winding to insert the ferromagnetic core, as will be seen.
  • the figure 8 illustrates an overmolded winding 4 surrounded by the folded sheet metal loop of a ferromagnetic frame 31, which is closed on itself.
  • a hole 310 in this loop is aligned coaxially with the hole of the overmolded coil, and allows to insert a ferromagnetic core 30 in the center of the coil.
  • the loop of this example has a rectangular section. It may have holes for securing the coil to other components, or for attaching the fluid inlet and outlet conduits.
  • the ferromagnetic core 30 has a cylindrical section and is traversed by an opening forming a cylinder for the displacement of the piston of an electromagnetic pump.
  • the core 30 has two sockets 300 of ferromagnetic material and separated by a sleeve 301 of non-ferromagnetic material used as air gap.
  • the inner face of the core may be provided with a coating adapted to the liquid to be pumped, for example a coating of food material in the case of pumping a liquid food. It is possible to choose the core 30 among a set of cores available,
  • the figure 9 illustrates an overmolded winding 4 surrounded by the ferromagnetic loop 31 of a laminated frame.
  • a hole 312 in this loop is aligned coaxially with the hole of the overmolded coil, and allows to insert a ferromagnetic core in the center of the coil.
  • the loop of this example is formed of a stack of sheets parallel to the axis a of the coil; its section is rectangular. It may have holes for securing the coil to other components, or for attaching the fluid inlet and outlet conduits.
  • the core 30 that can be inserted into this coil can be chosen by the same collection as in the embodiment of the figure 8 .
  • FIG 10 already described illustrates an example of conventional electromagnetic pump but which can be equipped with the coil of one of the described and claimed embodiments.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)
EP16204506.6A 2016-12-15 2016-12-15 Spule für elektromagnetische pumpe Withdrawn EP3336352A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16204506.6A EP3336352A1 (de) 2016-12-15 2016-12-15 Spule für elektromagnetische pumpe
CN201711339345.XA CN108231320B (zh) 2016-12-15 2017-12-14 用于电磁泵的线圈

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16204506.6A EP3336352A1 (de) 2016-12-15 2016-12-15 Spule für elektromagnetische pumpe

Publications (1)

Publication Number Publication Date
EP3336352A1 true EP3336352A1 (de) 2018-06-20

Family

ID=57758413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16204506.6A Withdrawn EP3336352A1 (de) 2016-12-15 2016-12-15 Spule für elektromagnetische pumpe

Country Status (2)

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EP (1) EP3336352A1 (de)
CN (1) CN108231320B (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515402C1 (de) * 1995-04-26 1996-10-24 Gotec S A Schwingkolbenpumpe
KR20120004568A (ko) * 2010-07-07 2012-01-13 (주) 이에스피스타텍 솔레노이드 펌프용 피스톤
DE202007019534U1 (de) * 2007-02-14 2013-06-26 Johnson Electric Dresden Gmbh Schwingkolbenpumpe
US20130272908A1 (en) * 2012-04-11 2013-10-17 Gotec Sa Electromagnetic Pump
WO2014177442A1 (en) 2013-04-30 2014-11-06 Gotec Sa Electromechanical pump
WO2017068537A1 (fr) * 2015-10-23 2017-04-27 Gotec Sa Module de chauffage pour pompe à liquide

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201638637U (zh) * 2010-02-04 2010-11-17 张荣峰 功率电感散热结构

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515402C1 (de) * 1995-04-26 1996-10-24 Gotec S A Schwingkolbenpumpe
DE202007019534U1 (de) * 2007-02-14 2013-06-26 Johnson Electric Dresden Gmbh Schwingkolbenpumpe
KR20120004568A (ko) * 2010-07-07 2012-01-13 (주) 이에스피스타텍 솔레노이드 펌프용 피스톤
US20130272908A1 (en) * 2012-04-11 2013-10-17 Gotec Sa Electromagnetic Pump
WO2013152975A1 (en) 2012-04-11 2013-10-17 Gotec Sa An electromagnetic pump
WO2014177442A1 (en) 2013-04-30 2014-11-06 Gotec Sa Electromechanical pump
WO2017068537A1 (fr) * 2015-10-23 2017-04-27 Gotec Sa Module de chauffage pour pompe à liquide

Also Published As

Publication number Publication date
CN108231320B (zh) 2021-09-17
CN108231320A (zh) 2018-06-29

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