EP3589840A1 - Élément de circuit de type solénoïde à disposition intégrée - Google Patents

Élément de circuit de type solénoïde à disposition intégrée

Info

Publication number
EP3589840A1
EP3589840A1 EP17719728.2A EP17719728A EP3589840A1 EP 3589840 A1 EP3589840 A1 EP 3589840A1 EP 17719728 A EP17719728 A EP 17719728A EP 3589840 A1 EP3589840 A1 EP 3589840A1
Authority
EP
European Patent Office
Prior art keywords
electro
solenoid assembly
assembly according
selective activation
thermal protection
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Withdrawn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
EP17719728.2A
Other languages
German (de)
English (en)
Inventor
Marta Cassola
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.)
Ceme SpA
Original Assignee
Ceme SpA
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 Ceme SpA filed Critical Ceme SpA
Publication of EP3589840A1 publication Critical patent/EP3589840A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • H01H2071/086—Low power connections for auxiliary switches, e.g. shunt trip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts

Definitions

  • the present invention relates to a solenoid-type circuital element, which can be used in various electronic and/or electrotechnical fields (such as for example realising electro valves or oscillating pumps and the like), and therefore the present invention also relates to functional assemblies - such as electro valves or pumps for pneumatic and/or hydraulic circuits - equipped with at least one such solenoid-type circuital element.
  • so-called “solenoids” also known by different names, including “induction coils”
  • induction coils By appropriately varying an electromagnetic field and exploiting the forces generated according to such variation, the mass is moved and therefore the effects can be exploited (for example in terms of the opening or closing, even partial, of a valve body, or in terms of imparting a fluid flow rate in a circuit).
  • solenoids of the known type are functionally coupled to other circuital: components typically, coupling with a selective electrical energy supply device (or more simply a "switch") is necessary and coupling is often also necessary with electronic safety devices that interrupt the electric power supply to the solenoid when the latter is overheated.
  • a selective electrical energy supply device or more simply a "switch”
  • thermal protection devices such as "thermistors” (therefore “PTC” or “NTC” type semiconductor devices) are used, the latter must be chosen in a very restricted way with respect to the specific application of the solenoid: the restricted choice, which largely depends on the critical transition temperature of the thermistor's behaviour (which as is known changes its status from being a conductor to an insulator according to reaching a certain threshold temperature), means a very wide range of integrated solenoids has to be designed and produced, which must be differentiated in an economically disadvantageous way according to the different working conditions (activation frequency, maximum environmental temperature to which it may be exposed etc.) to which the solenoid must be subject when installed in a complex product and/or in a circuit.
  • thermal protection devices such as “thermistors” (therefore “PTC” or “NTC” type semiconductor devices) are used, the latter must be chosen in a very restricted way with respect to the specific application of the solenoid: the restricted choice, which largely depends on the critical transition temperature of the thermistor'
  • thermal protectors and activation switches are structurally integrated, it is not infrequent to impart a substantial thermal shock (for example due to the fact that the components are inserted into a mould into which the plastic which is to contain them is poured) on the circuital components to be integrated, and this thermal shock may be the cause of practically irreversible damage on the "final" assembled product.
  • the object of the present invention is therefore to provide an integrated solenoid assembly which performs its main function with great efficiency and speed but which at the same time is very easy and cheap to design and build in volume manufacturing.
  • the object of the present invention is to implement an integrated solenoid assembly which however guarantees excellent activation (both in terms of the effort exerted and in terms of control precision) by the control system into which the assembly itself is integrated.
  • an object of the present invention is that of designing an integrated solenoid assembly which is both universal i.e. that can be easily assembled on a wide range of complete products (e.g. on valves or on pumps) which can in turn be assembled in hydraulic or pneumatic circuits of a rather different nature.
  • An embodiment of the integrated solenoid assembly according to the invention is now described, by way of non-limiting example, represented in the appended figures, in which:
  • FIG. 1 and 2 show, from different angles, perspective views of the integrated solenoid assembly according to the invention
  • figure 3 shows a front view of the integrated solenoid assembly of figure 1 ;
  • figure 4 shows a sectional view of the integrated solenoid assembly according to trace line Ill-Ill of figure 2;
  • FIG. 5 shows a perspective view of a second embodiment of the integrated solenoid assembly according to the invention.
  • figure 6 shows a sectional view of the integrated solenoid assembly according to trace line VI-VI of figure 5.
  • the integrated solenoid assembly according to the present invention is, as mentioned above, associable with electro valves and/or oscillating electro pumps and, from a structural point of view, essentially comprises an electro inductive element 2 (which in turn defines a predetermined number of turns arranged along an axis of extension 2a) connectible at its respective ends to an electric power supply circuit and a selective activation element 3 (or in other words a switch) operatively active on the electro inductive element 2 for configuring it reversibly at least between an inactive condition - in which an electromagnetic field is not generated - and an active condition - in which an electromagnetic field is generated.
  • the thermal protection element 4 which is active on the electro inductive element 2 and/or on the selective activation element 3 for defining an emergency condition thereof in which an electric power supply is interrupted according to reaching a critical temperature: advantageously, the electro inductive element 2, the selective activation element 3 and the thermal protection element 4 are contained in a containment shell 5 which in turn is placed in simultaneous direct contact with the electro inductive element 2, with the selective activation element 3 and with the thermal protection element 4 (hence defining a structural and functional integration between these same components).
  • the selective activation element 3 and the thermal protection element 4 are positioned "within" the containment shell 5 (i.e. they are inside the volume defined by the containment shell 5 or however in close contact with its internal or external delimiting surfaces) at a portion of the electro inductive element 2 having a maximum working temperature during conditions of use of the integrated solenoid assembly 1 : in this way, the safe working conditions of the integrated assembly 1 are maximised, since any over-heating due to abnormal working conditions is perceived with a practically minimal time delay (or even no delay) and may be translated immediately into the safe switching off of the solenoid itself.
  • the selective activation element 3 and the thermal protection element 4 are positioned "within" the containment shell 5 (i.e. inside the volume defined by the containment shell 5 or however in close contact with its inner or outer delimiting surfaces) at a median portion of the electro inductive element 2: from a geometric point of view, such median position is defined along the axis of extension 2a at equal distances from the ends of the electro inductive element 2 itself.
  • the latter may comprise a main portion 5a circumscribed to the electro inductive element 2 (this portion is conformed according to a cylindrical body), a base portion 5b connected to the main portion 5a in proximity to at least one end of the electro inductive element (this portion is conformed according to a toroid) and finally a containment portion 5c afforded internally to the main portion 5a and/or the base portion 5b; the containment portion 5c is counter- shaped to the selective activation element 3 and/or to the thermal protection element 4 and, in fact, comprises one or more cavities.
  • the present invention envisages the selective activation element 3 comprising at least one diode, while the thermal protection element 4 comprises at least one bimetallic relay: the latter choice makes the integrated solenoid assembly very flexible in terms of adaptation, in contrast to the prior art described above (thermistors).
  • electro connectors 6 are also provided, emerging from the containment shell 5 and circuitally connected at least to the electro inductive element 2: in the appended figures, it can be seen that these electro connectors 6 emerge from the base portion 5b of the containment shell 5.
  • the containment shell 5 is realised through co-moulding on the electro inductive element 2, on the selective activation element 3 and on the thermal protection element 4: this enables extremely fast production operations and also simultaneously allows all the components of the integrated assembly 1 to be equally protected from the external environmental conditions and stabilised in terms of relative position.
  • the containment shell 5 itself is co-moulded onto the electro inductive element 2 maintaining an interval of melting and/or moulding temperatures comprised between 240 °C and 260 °C and preferably comprised between 242 °C and 255 °C.
  • the containment shell 5 may be realised so as to comprise a housing pocket 5a, which in turn may be intended to receive the electro inductive element 2 and/or the selective activation element 3 and/or the thermal protection element 4 (the choice of one or more of these components varies according to the requirements at the time): such pocket may be in any position, for example it may be at a cylindrical external lateral surface of the containment shell 5 or, as shown in figures 5 and 6, the pocket 5a may conveniently be realised at or in proximity to an internal surface of the containment shell 5 (such internal surface is typically preferably a cylindrical external lateral surface).
  • the pocket 5a illustrated in the figures just described defines an axis of insertion parallel to the axis of extension 2a and offset radially with respect to the latter and, furthermore, in the pocket 5a, an insertion opening is defined along such axis of insertion.
  • the pocket 5a further defines housing spaces adapted to allow circuital connections between the electro inductive element 2 and/or the selective activation element 3 and/or the thermal protection element 4 (as can be seen in figures 5 and 6, there may be electrical connections "in series" between the circuital elements just mentioned).
  • a complex functional assembly is also conveniently part of the present invention, which may for example be a solenoid-type activation electro valve or an oscillating electro pump still activated by one or more solenoids, which include at least one integrated solenoid assembly according to what has been described up to now and according to the following claims.
  • the invention achieves various advantages with respect to the prior art. Above all, thanks to its peculiar structural architecture - and the consequent possible realisation procedure resulting therefrom - it is possible to minimise the overall dimensions of the finished product, guaranteeing at the same time notable operating reliability and easy and cheap volume manufacturing. Furthermore, the peculiar choice of electronic components used in the present invention allows the degree of "strength" and the application versatility of the integrated solenoid assembly to be greatly increased, since it adapts very easily to different application/operating conditions without any "surgical" changes or choices of components (which further increases the economic value in terms of large scale manufacturing).
  • the presence and special geometry/topology of the encapsulation shell performs the important function of protecting the components inside it: this protection is particularly effective against the thermal shock which occurs when performing the "final" integrative assembly of the solenoid assembly in electro valve bodies or electro pump bodies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnets (AREA)

Abstract

L'invention concerne un ensemble solénoïde intégré comprenant un élément électro-inductif, un élément d'activation sélective actif sur l'élément électro-inductif et un élément de protection thermique ; l'élément électro-inductif, l'élément d'activation sélective et l'élément de protection thermique sont contenus dans une même enveloppe de confinement qui, à son tour, est en contact simultané direct avec l'élément électro-inductif, avec l'élément d'activation sélective et avec l'élément de protection thermique.
EP17719728.2A 2017-03-01 2017-03-01 Élément de circuit de type solénoïde à disposition intégrée Withdrawn EP3589840A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2017/000041 WO2018158785A1 (fr) 2017-03-01 2017-03-01 Élément de circuit de type solénoïde à disposition intégrée

Publications (1)

Publication Number Publication Date
EP3589840A1 true EP3589840A1 (fr) 2020-01-08

Family

ID=58633069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17719728.2A Withdrawn EP3589840A1 (fr) 2017-03-01 2017-03-01 Élément de circuit de type solénoïde à disposition intégrée

Country Status (2)

Country Link
EP (1) EP3589840A1 (fr)
WO (1) WO2018158785A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018158785A1 (fr) 2017-03-01 2018-09-07 Ceme S.P.A. Élément de circuit de type solénoïde à disposition intégrée

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2711548A2 (fr) * 2012-09-25 2014-03-26 ARS Elettromeccanica S.r.l. Pompe à vibration

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306842A (en) * 1978-06-28 1981-12-22 Jidosha Kiki Co., Ltd. Electromagnetic pumps
US7106593B2 (en) * 2004-04-06 2006-09-12 Motor Components, Llc Heat sink assembly for a potted housing
ITMI20111508A1 (it) * 2011-08-05 2013-02-06 Ceme Spa Elettropompa, in particolare del tipo a cursore oscillante
WO2018158785A1 (fr) 2017-03-01 2018-09-07 Ceme S.P.A. Élément de circuit de type solénoïde à disposition intégrée

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2711548A2 (fr) * 2012-09-25 2014-03-26 ARS Elettromeccanica S.r.l. Pompe à vibration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018158785A1 (fr) 2017-03-01 2018-09-07 Ceme S.P.A. Élément de circuit de type solénoïde à disposition intégrée

Also Published As

Publication number Publication date
WO2018158785A1 (fr) 2018-09-07

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