EP2053322B1 - Anordnung für einen elektrischen Anschluss, Starter und Schutz eines elektrischen Motorenkompressors, der mit einem hermetischen metallischen Gehäuse abgedichtet ist - Google Patents

Anordnung für einen elektrischen Anschluss, Starter und Schutz eines elektrischen Motorenkompressors, der mit einem hermetischen metallischen Gehäuse abgedichtet ist Download PDF

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Publication number
EP2053322B1
EP2053322B1 EP08164845A EP08164845A EP2053322B1 EP 2053322 B1 EP2053322 B1 EP 2053322B1 EP 08164845 A EP08164845 A EP 08164845A EP 08164845 A EP08164845 A EP 08164845A EP 2053322 B1 EP2053322 B1 EP 2053322B1
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EP
European Patent Office
Prior art keywords
electrical
connection
metal
shroud
bracket
Prior art date
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Not-in-force
Application number
EP08164845A
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English (en)
French (fr)
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EP2053322A3 (de
EP2053322B8 (de
EP2053322A2 (de
Inventor
Carlo Del Grande
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BDG el SRL
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BDG El SpA
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Publication of EP2053322A2 publication Critical patent/EP2053322A2/de
Publication of EP2053322A3 publication Critical patent/EP2053322A3/de
Publication of EP2053322B1 publication Critical patent/EP2053322B1/de
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Publication of EP2053322B8 publication Critical patent/EP2053322B8/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/02—Compressor arrangements of motor-compressor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/803—Electric connectors or cables; Fittings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/002—Structural combination of a time delay electrothermal relay with an electrothermal protective relay, e.g. a start relay

Definitions

  • the present disclosure relates in general to the wiring of electrical appliances and the powering of at least an electric motor of the appliance.
  • this disclosure relates to pre-fabricated assemblies with functions: of wiring terminal block, motor starter and protection device from excessive current absorptions and overheating, for an electrical moto-compressor sealed in a hermetic shell.
  • the plug-on connectivity of the electrical leads protruding out of the dielectric pane of the so-called fusite has promoted the use of electrical interconnection assemblies that could be installed in a metal box or bracket welded to the metal shell of the moto-compressor, incorporating female contacts (also shortly female contacts) or sockets suited to be slipped over the respective male electrical leads protruding out of the fusite.
  • the Italian patent No. 1267406 and 1268138 respectively disclose a typical terminal board and an integrated block of electrical interconnection wherein electrical start up components of motor and protection devices from overcurrents and/or overheatings of a moto-compressor, hermetically contained in a metal shell and electrically powerable through a fusite , are installed inside a metal box welded to the metal shell of the motocompressor.
  • the document EP-1111316-A1 discloses an electrical connection assembly for a moto-compressor particularly for a refrigerator, composed of a terminal board having a plurality of a terminals for connecting the wires of the power cable of the appliance and for connecting other functional devices of the appliance, which is installed on a metal plate welded to the hermetic metal shell of the moto-compressor, and socket means for establishing electrical contacts with the electrical leads protruding out of the fusite.
  • the assembly accommodates the motor starter device and a protection device from overcurrents and/or overheating, electrically connected to the control circuit of the electric motor of the sealed moto-compressor.
  • WO 2006/058396 discloses a mounting arrangement for the starting system of a compressor, that provides the secure fixation of a capacitor to a starting module without requiring the provision of additional fixation means.
  • WO 02/47236 discloses a constructive arrangement for the starting system of an electric motor which, in case a capacitor is directly affixed to the module of the starting system, avoids the connection of other capacitor of the same type to the module.
  • the document EP 1657733 discloses a connecting package for a refrigerator compressor, in which an electric connection for various elements is easily achieved through a single package in such a manner that a motor can be protected from overload when an operation of the refrigerator compressor starts while improving an operating efficiency of the motor, moisture including water or rainwater can be prevented from penetrating into a connection part when the connecting package is coupled with the refrigerator compressor while reducing an influence of load generated when coupling the connecting package with the refrigerator compressor, and the connecting package can be stably connected to a body of the refrigerator compressor, thereby stably operating the refrigerator compressor.
  • WO 2006/080698 discloses a clamp device for detachably mounting to a compressor body a connecting package for a refrigerator compressor capable of easily performing with a single package unit a connecting operation such as start of a refrigerator compressor, protection of a motor from overload, and improvement of motor efficiency.
  • WO 2007/012961 discloses an integrated terminal board device for installation on a fluid-tight terminal having pin contacts, installable on a Fusite(R) type terminal, in particular for compressors.
  • a wholly pre-assembled article of manufacture, implementing all necessary electrical connections, ready to be installed on a cooperating metal bracket or support suitably shaped, that can be pre-welded to the metal shell (in practice to one of the two semishells) of the motor-compressor, would be highly desirable also because it would permit such pre-assembled electrical connection articles, to be supplied already pre-tested by the supplier, to the manufacturer of the appliances.
  • such typically sub-applied component would be installable onto the moto-compressor as a unique piece without requiring the use of assembly hardware (for example screws) and implying only the need of connecting the conductors of the power cable to a terminal board of the unit and other connectors (eventually terminating with a so-called "Faston” socket) wires of connection of control devices and ancillary service devices of the appliance to respective "Faston” plugs on such a connector unit and the mechanical fastening of the insulated electrical conductors of the power cable and of the other connection wires.
  • assembly hardware for example screws
  • the electrical continuity (short circuiting) between the hermetic metallic shell of the moto-compressor and a ground terminal of the terminal board to which the conductors of the power cable of the appliance are connected does not require any dedicated assembly operation, being ensured, in full respect of safety regulation, upon presenting in correct alignment and pushing the pre-assembled electrical connection unit to its definitive position on a rest surface of a metal bracket welded to the metal shell for establishing plug-on contacts to the electrical leads or pins protruding out of the fusite pane.
  • the ground connection to the metal bracket and to the shell to which the sealed moto-compressor is welded, is securely established before establishing a contacts with the leads (active leads) of electrical power supply of the moto-compressor, upon installing the unit of electrical connection and sequentially after it, should the electrical connection unit be lifted off for repair or substitution, as imposed by safety rules.
  • the ground connection is established by a plug-on female semi-contact termination of an inner metal lamina of the connection unit having a second termination, for example a male Faston wingled termination over which a suitable female Faston contact termination, for example a Faston socket, of a relative ground wire of the power cable of the appliance, is eventually coupled and a metal pin contact that may be directly welded or in any case projecting parallel to the electrical leads of the fusite, from the surface of the metal bracket welded to the shell.
  • the male metallic pin (semicontact or shortly contact) may be easily shielded by a plastic cap that is successively stripped-off, during surface cleaning and varnishing treatments of the metal shell and of the metal bracket welded to it.
  • the height of the male ground semicontact or shortly contact is greater than the height of the powering and start up leads protecting out of the fusite pane, thus ensuring the required sequentiality of grounding of the metallic mass and contacting of the active phases of start up and control of the motor.
  • All the interconnection metal laminae as well as commonly pre-encapsulated start up and protection devices are accommodated and stably retained in dedicated seats, slots, undercut profiles or channels defined in a body of plastic material of the multifunction connector unit during its formation by injection molding.
  • a coordinated definition of geometries of the metal laminae and of their male contact and/or female contact appendixes for establishing the required circuital connections form also an array of male semicontacts (or shortly contacts) for connecting suitably terminated insulated wires, respective female contacts or sockets for contacting in a plug-in fashion the leads of the fusite pane and of the ground connection male contact, and of connection of commonly “encapsulated” electrical start up and protection devices, installed in dedicated recesses formed in the molded plastic body, permits the mounting of all the above mentioned electrical components of the relative functional electrical circuits that are thus implemented in the pre-assembled connection unit by automated actuators, according to common automation practices, for minimizing fabrication costs of the wholly pre-assembled connection unit of this disclosure.
  • connection unit includes a plastic shroud slidely engaged on guides purposely defined on the upper and lower sides of the body of plastic material to be eventually pushed to an end stop position in abutment against an end wall or flange of the body of plastic material.
  • purposely formed relieves on the outer surface of the upper side and of the lower side of the slidable shroud engage under one or more folded edge portions that are purposely formed along the two parallel upper and lower sides of the supporting metal bracket, thus ensuring stability of the preassembled connection unit once is installed over it, by preventing accidental extraction or detachment of the installed unit therefrom.
  • the slideable shroud defines or incorporates also two distinct cable stoppers. One is dedicated to hold fast the end of the power cable of the appliance and the other is dedicated to the fastening of connecting wires of remotely installed electrical components and devices of the appliance.
  • the slideable shroud once is pushed to its end stop position, completely covers otherwise exposed parts of the body of plastic material and of the elements installed therein, leaving accessible only the side of the body of plastic material at the opposite end of this side wall or flange against which the slidable shroud abuts and where are arranged the terminals or array of contacts (for example of male Faston contacts) that constitute an electrical terminal board for connecting all the insulated wire of connection to the mains and to components and electrical devices remotely installed in the appliance.
  • the terminals or array of contacts for example of male Faston contacts
  • the terminals may have their longitudinal axis parallel to each other such to permit even an optional constitution and use of multipolar plug-on connectors of geometry suitably coordinated with the geometric distribution of the parallel terminals.
  • all the connections may be shrouded by the slideable shroud itself of suitably designed length and geometry for a longer travel of sliding in engagement with the docking bracket, or alternatively, as in the exemplary embodiment illustrated in the figures, by a second shrouding element in the form of a plastic end cap adapted to be momentarily removed in order to facilitate connections of all wires and the blocking of the cables and insulated wires in the relative stoppers and finally re-engaged in position.
  • molded plastic slideable shroud with a liftable portion, either snap-on or hinged, for exposing the electrical terminal board on which connecting the cables and wires.
  • a plastic end cap of the slideable shrouding element has spines that are eventually inserted in receiving channels formed in the slideable shroud to be pushed to an end stop position with a rim of the end cap in abutment against an end rim of the slidable shroud.
  • the preassembled connection unit of this disclosure satisfies all the stated objectives such as:
  • Figure 10 is a rendering of an exploded view of the body of plastic material and of the docking metal bracket partially sectioned for showing the ground connection pin of the metal bracket and the locking details between the metal bracket and the electrical connection unit mounted thereon.
  • Figure 11 is a rendering showing the pre-assembled connection unit as manufactured and eventually packed in transportation and storage containers.
  • Figure 1 is an electrical-mechanical diagram that is useful for identifying the relevant electrical components and their interconnection in the complete electrical circuit of the appliance and illustrating the plug-on contacting of electrical connection pins projecting out of the fusite pane for starting up and controlling the electrical motor of the hermetically sealed moto-compressor and for grounding the metallic shell 2.
  • the rectangular perimeter drawn with a dot line identifies the paths of the functional electrical circuit of the appliance that are integrated within the body of plastic material 1 of the electrical connection unit of this disclosure, incorporating also pre-encapsulated start-up and protection devices of the moto-compressor.
  • connection unit The two pre-encapsulated components OLP and PTC, accommodated within the connection unit, are clearly observable in the diagram and the way they connect respectively to the functional start-up and control circuit of the motor.
  • FIG. 1 further illustrates an array of plug-on terminals (as a preferred embodiment of electrical terminal board) shown in the form of an array of male Faston contacts, which for the exemplary application considered, comprises fourteen distinct connection terminals for as many conductors of electrical cables and wires. Of course the number may be smaller or larger depending on the specific application (appliance).
  • connection terminals in excess of those effectively utilized such to make readily available electrical power phases for possible optional add-on accessory services of the appliance (internal lighting, electronic controller, signalling lights and alike), that may be located far from the connection unit mounted at the exterior of the moto-compressor.
  • the exemplary diagram of Figure 1 is typical of a domestic refrigerator.
  • the start-up circuit of the electric motor of the moto-compressor comprises a pre-encapsulated positive coefficient termistor (PTC), electrically connected in parallel to a capacitor C that may be mounted externally of the connection unit and, as will be described later, preferably hanging it to a dedicated outer hook purposely formed on the exterior surface of the end wall of the body of plastic material opposite to the end side at which the electrical wiring terminal board is organized.
  • PTC pre-encapsulated positive coefficient termistor
  • All the electrical connections within the broken line perimeter are established by metal lamine installed and retained in channels, slots, of suitable shape or cross action profile purposely defined and formed in the molded plastic body 1 upon molding it.
  • the metal lamina eventually provided with male winglet terminations and/or of flexible sockets and/or female terminations for the contemplated plug-in electrical connections, realize the inner electrical circuit path in the pre-fabricated connection unit, as exemplarily shown in Figure 1 .
  • Figure 2 shows an embodiment of the metallic bracket 3 that is welded to the shell 2 of the hermetically sealed moto-compressor of the appliance, for sustaining the connection unit.
  • the metal bracket 3 has a docking surface of the connection unit to be installed thereon that may be substantially planar, having an opening through which the outermost part of the fusite 4 and the relative electrical connections 5, 6 and 7 for connecting the sealed moto-compressor to the external world that project out along parallel axis orthogonal to a rest planar surface of the bracket.
  • the bracket 3 has the upper and the lower parallel edges bent at 90°, both having winglets 9-10 and 11-12 outwardly oriented.
  • These output winglets may be single or even more than two per each side and their blocking function (as will be described later in the description) could even be satisfied by alternative different geometrical features, such as for example guides, channels, holes or slots that may be stably engaged by cooperating guides, ridges, channels or pins formed in a plastic rider shroud element the molded plastic body 1 of the pre-fabricated connection unit of this disclosure, as will be described in ensuring description.
  • a metal pin or male contact 8 protrudes from the rest surface of the bracket 3, and from one end side of the rest surface of the bracket 3 a wing extends firstly downwards below the level of the rest surface and successively raises back above the rest surface and terminates with a hole 14.
  • Figure 3A shows the molded plastic body 1 without any covering element in order to make visible its structure, as installed on the docking metal bracket 3.
  • pre-encapsulated protection device OLP for example a so-called 3/4" device
  • OLP also accommodated within the body of plastic material 1 in a position such that a heat sensing surface of the device be in contact with or immediately close to the planar rest surface of the metal bracket 3 near the fusite , in order to track the thermal excursion during operation of the appliance and eventually determine the interruption of the electrical powering of the motor of the moto-compressor upon exceeding a limit threshold value of temperature, whether caused by an abnormally high current absorption exceeding the relative threshold of intervention of the device, or by any other cause.
  • OLP for example a so-called 3/4" device
  • Protection from over absorption of current and/or overheating may be implemented even with specific protection devices of different type from the one mentioned above, for example specific electronic devices, suitably encapsulated, that may be similarly pre-installable and connectable within the pre-fabricated connection unit of this disclosure even not necessarily placed in contact or in proximity of the planar rest surface of the metal bracket, according common alternative practices well known to the skilled technician.
  • Figure 3A allows also to observe the electrical connection to the circuit of the appliance of the protection device OLP through the relative metal lamine 16 and 17.
  • the lamina 16 establishes the connection of one of the two terminals of the OLP device to the female socket 5f that is in contact with a pin 5 of the fusite (re: Figure 1 )
  • the lamina 17 establishes the electrical connection of the second terminal of the protection device OLP to the Faston winglet m9 of the "terminal board" to which the return wire from a remotely installed thermostat T of the appliance (re: Figure 1 ) will be connected upon completing the installation of the electrical connection unit of this disclosure.
  • a positive coefficient thermistor device PTC as it is commonly employed in the start up circuit of typical motocompressor of refrigerators, has its terminal contacted by the same metal lamine of interconnection of the female sockets 6f and 7f in contact with the respective pins 6 and 7 of the fusite , corresponding to start-up terminal of the starter winding of the sealed moto-compressor.
  • These lamine are not entirely visible in the view of Figure 3A of the unit but are partially observable their respective winglet m2 and m10 of connection to external wires (re: Figure 1 ).
  • Figure 3B is useful view for identifying and observing also the spatial arrangement of the Faston winglets m1-m14 of the terminal board of the electrical diagram of Figure 1 , all extending along parallel axis from the same end surface of the molded plastic body 1 of the unit.
  • connection unit that may contemplate the use of one or more multipolar connectors having a plurality of female contacts, co-coordinately disposed such to permit the connection of external wires and cables thus terminated, by a multipolar connector by simply plug-in on one or more or such multipolar connectors on the respective male contacts protruding from one terminal surface on the pre-fabricated connection unit.
  • Figure 3C shows the electrical devices PTC and OLP, the related electrical interconnection lamine, the contacts m1-m14 of the electrical terminal board and the socket terminations 5f, 6f and 7f for contacting the pins of the fusite and of the other socket termination 8f for connecting to the ground pin, in their spatial arrangement of assembly in or on the molded plastic body 1, that is suitably shaped for accommodating and holding fast them.
  • Figure 3D shows the body of plastic material 1 with its external shroud 19 incorporating also two distinct cable stoppers 21 and 15 (shown without the respective guillotine) in the state in which the completely pre-fabricated connection unit may be presented and stably engaged on the supporting metal bracket 3 before connecting all the electrical wires to the respective Faston male contacts by the workman carrying out the final assembly and wiring of the appliance (e.g. a refrigerator).
  • the appliance e.g. a refrigerator
  • bracket or hook 25 that may be optionally defined on the outer surface of the end wall 26 of the molded plastic body 1, to hold fast an eventual capacitor to be connect in the start up circuit of the moto-compressor in case it is contemplated by the specific electrical device of the moto-compressor (re: the exemplary electrical scheme of Figure 1 ).
  • a capacitor of appropriate size with a suspension appendix and provided with insulated connecting wires suitably terminated for connecting to dedicated terminals of the connection unit would be stably hanged on the provided outer bracket 25.
  • the covering shroud 19 has channels 18f that engage in a slidable manner purposely formed guides 18 defined over the outer surfaces of the upper and lower sides of the body of plastic material 1, while a lower relief or ridge that defines the channel of engagement on the guide 18, slides sequentially underneath the two outwardly oriented winglets of the edge bent at 90° of the metal bracket 3, respectively 11 and 12 in the views of Figures 4 and 5 , and respectively 9 and 10 in the views of Figures 7 and 8 , thus stably fixing the pre-fabricated connection unit to the docking metal bracket 3 welded to the shell 2 of the moto-compressor.
  • the plastic rider 19 has an appendix or channel shaped guide 21s parallel to and facing toward a second tubular appendix 21b having a longitudinal cut 21a, into which a guillotine 21g (re: Figure 9 ) will be eventually introduced to be then forced onto the outer insulation of electrical wires and/or electrical multiconductor cables of connection of external or remotely installed electrical devices of the appliance introduced in the cable stopper indicated as a whole with 21.
  • a guillotine 21g (re: Figure 9 ) will be eventually introduced to be then forced onto the outer insulation of electrical wires and/or electrical multiconductor cables of connection of external or remotely installed electrical devices of the appliance introduced in the cable stopper indicated as a whole with 21.
  • a second cable stopper 15, also integral to the sliding shroud 19 for the power cable of the appliance may be realized by forming as in the former example, a second appendix in which are defined two parallel channel-like guides facing each other 15a and 15b (re.: Figure 7 ), between which will be eventually introduced a bridge-shaped guillotine 15g (re.: Figure 11 ) having flexible side arms terminating with hooks or undercut portions suitable to engage into co-operating retaining cavities (not visible in the figures but easily figured out by the skilled technician) formed in the channel like guides 15a and 15b and that are reached by forcing the elastic bridge-shaped guillotine to squeeze over, the outer insulating sleeve of a power cable introduced between the two parallel guides.
  • the three insulated wires of the power cable, terminating with female Faston contacts will then be connected onto respective male Faston contacts m1, m2 and m3 of the terminal board organized in the body of plastic material 1 of the unit.
  • Both guillotines 21g and 15g may be commonly formed at the free end of thin flexible plastic bands of connection to the main body of the sliding shroud 19 upon molding the parts by injecting plastic material in the mould, thus forming the two guillotines as appendixes connected to the main body of the sliding shroud 19 from which they will be separated by cutting the connecting bands at the moment of being introduced in the receiving guides of the two cable stoppers integrally formed with the sliding shroud 19.
  • the blocking of the guillotine 21g of the first cable stopper over the electrical wires and/or multiconductor cables of connection of external or remote electrical devices of the appliance may be ensured by introducing a common self-threading screw 21v through a hole in the tubular base 21b of the guillotine slidely introduced inside the tubular appendix 21i ,and screwing it in a star hole defined through an inner boss (21a) visible in the cut open portion of Figure 3D ).
  • the sliding shroud 19 is provided with guides 24f for receiving respective parallel hooking stems 24 of the molded plastic end cap 23.
  • cooperating point-form relieves will eventually fall upon displacing the sliding shroud 19, by virtue of its elastic memory, "confirming" the displacement of the sliding rider 19 over the body of plastic material 1 to one or the other of the two positions.
  • the pre-fabricated connection unit may be supplied with the sliding covering shroud 19 in the slightly backed-off position such that the assembler may simply plug the object on the connection pins 5, 6 and 7 of the fusite and on the ground pin 8, by correctly presenting and pushing the unit against the docking surface of the metal bracket 3, after which the assembler will simply force the sliding shroud cover 19 to slide toward and reach its end run position against the end wall 26 of the main body 1, thus engaging itself underneath the outwardly extending winglets 9-10 and 11-12 of the metal bracket 13 (re: Figure 2 ), and finally reaching its stop position, confirmed by the "falling" of the point-form relieves in the respective indentations.
  • Figures 7-9 are renderings from different point of observation of the connection unit installed on the docking bracket with the covering element namely the plastic shroud 19 and the removable molded plastic end cap 23, either set in position or shifted/exploded, in order to better illustrate geometrical and functional features of the different elements of the connection unit.
  • Figure 10 is a rendering of the view that would be hypothetically observed from underneath the docking metal bracket 3 with parts of the unit assembly such as the metal bracket, the sliding shroud and the associated end cap, partially cut out in order to illustrate the manner in which the connection unit is presented in alignment with the electrical connection pins 5, 6, 7 and 8 when installing it over the docking bracket 3.
  • This Figure permits also to observe the inner appendix in form of a flexible hook 28, integrally defined in the molded plastic end cap 23 when the removable end cap 23 is finally re-applied at the end of the other covering element represented by the sliding plastic shroud 19, after having completed the connection of the external electrical wires and crimped the insulated wires and cables in the respective cable stoppers integrally formed with the molded plastic shroud 19, the inner hook 28, from a slightly flexed position caused by interference with the end portion of the bent elongated wing 13 of the metal bracket 3 terminating with the slotted hole 14, eventually falls into the slot 14 by virtue of its elastic memory, thereafter impeding involuntary removal of the electrically insulating end cap of molded plastic 23 that covers the connected terminations of the electrical wires.
  • Figure 11 is a rendering showing the pre-assembled connection unit, containing all the above described components and electrical devices, as manufactured and eventually packed in suitable transportation/storage boxes. From this figure, it may also be observed the first guillotine 21g for blocking the power cable, a tubular base of which 21b is introduced inside the receiving tubular appendix 21i, and its upper cross-shaped profile edge that slidely engages in the channel like shaped guide 21s, as well as the head 21v of a self-threading screw that may be finally tightened to push and retain in place the cable stopping guillotine, passing through the tubular base 21b and screwing in a star shaped hole that is formed in the inner boss 21n, observable in the cut-out portion of Figure 3D of the tubular appendix 21i.
  • the first guillotine 21g for blocking the power cable a tubular base of which 21b is introduced inside the receiving tubular appendix 21i, and its upper cross-shaped profile edge that slidely engages in the channel like shaped guide 21
  • the electrical wiring assembler needs to simply pull off momentarily the end cap 23 from the sliding shroud 19, install the connection unit on the docking bracket 3 and block it in place by pushing the plastic shroud (rider) 19 to its end-travel position engaging it under the outwardly oriented winglets present along the upper and lower bent edges of the metal bracket.
  • the geometry of the molded plastic body 1 and of the two covering elements 19 and 23 is such to permit their fabrication by injection molding in purposely made molds using a thermoplastic resin of adequate mechanical and dielectric characteristics as commercially available, such for example a polyamide or a polybutylterephthalate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)

Claims (9)

  1. Anordnung zum elektrischen Anschluss, zur Inbetriebnahme und zum Schutz vor einer übermäßigen Stromaufnahme und/oder Überhitzung eines elektrischen Motorkompressors, der in einem abgedichteten Metallgehäuse (2) enthalten und durch elektrischen Stifte (5, 6, 7) anschließbar ist, die aus einer dielektrischen Scheibe oder Fusite (4) vorstehen, die in die Metallwand des Gehäuses (2) integriert ist, die aufweist: eine Anschlusseinheit und eine Ankopplungsmetallhalterung (3), die eingerichtet ist, an das Gehäuse (2) geschweißt zu werden, einen dielektrischen Körper (1) aus Kunststoff der Anschlusseinheit, in den eine Mehrzahl elektrischer Anschlüsse (m1-m14) für den Anschluss elektrischer Leitungen eines Netzkabels und elektrischer Anschlussleitungen extern oder entfernt installierter elektrischen Schaltungskomponenten des Geräts eingebaut sind, wobei die Anschlusseinheit vollständig vormontiert ist und aufweist:
    mindestens eine Motorinbetriebnahmevorrichtung (PTC) und eine Vorrichtung zum Schutz (OLP) vor übermäßiger Stromaufnahme und/oder Überhitzung des Motorkompressors, die in Aussparungen des dielektrischen Körpers (1) aus Kunststoff untergebracht ist;
    eine Mehrzahl elektrischer Metallanschlussplättchen mit Enden, die eingerichtet sind, die Mehrzahl elektrischer Anschlüsse (m1-m14) zu bilden, und Steckbuchsen (5f, 6f, 7f, 8f), die eingerichtet sind, jeweilige Anschlussstifte der Fusite und einen Masseanschlussstift (8), der aus einer Ankopplungsfläche der Metallhalterung (3) parallel zu den Stiften (5, 6, 7) vorsteht, bei der Ankopplung der Anschlusseinheit an die Metallhalterung einzustecken;
    dadurch gekennzeichnet, dass
    die räumliche Anordnung der Steckbuchsen und der Stifte so gestaltet ist, dass die Herstellung des Masseanschlusses (8f-8) vor der Herstellung des elektrischen Anschlusses mit den Stiften der Fusite sichergestellt wird;
    mindestens eine dielektrische Verkleidung (19) aus Kunststoff mit einem ersten Eingriffsmittel (18f), das eingerichtet ist, gleitend mit dem Körper in Eingriff zu treten, und einem zweiten Eingriffsmittel, das eingerichtet ist, unter erhabene und nach außen gebogene parallele Kanten (9-12) der Metallhalterung (3) einzugreifen, zum Arretieren der Anschlusseinheit an der Ankopplungshalterung, während gleitende Verschiebungen der Verkleidung (19) zugelassen werden;
    mindestens zwei Guillotinekabelstoppervorrichtungen (15, 21), die integral mit der verschiebbaren Verkleidung (19) ausgebildet sind und sich von ihr erstrecken.
  2. Anordnung nach Anspruch 1, wobei der Masseanschlussstift (8), der aus der Ankopplungsfläche der Metallhalterung (3) vorsteht, in der Form eines männlichen Metallkontaktstifts vorliegt, der mit der Metallhalterung verbunden ist, der im Fertigungszustand zur Abschirmung der elektrischen kontaktierbaren Stiftoberfläche während Korrosionsschutz- und Lackierungsbehandlungen des Metallgehäuses und der daran geschweißten Metallhalterung mit einer abziehbaren Kunststoffhülle versehen ist, die im Moment des Einbaus der Anschlusseinheit abziehbar ist.
  3. Anordnung nach Anspruch 1, die ferner eine entfernbare dielektrische Endkappe (23) aus geformtem Kunststoff aufweist, die Eingriffsdorne (24) aufweist, die eingerichtet sind, in zusammenwirkende Kanäle (24f) zu gleiten und gehalten zu werden, die in der verschiebbaren Verkleidung (19) ausgebildet sind, so weit, bis sie gegen Endflächen der Verkleidung stoßen.
  4. Anordnung nach Anspruch 3, wobei die Endkappe (23) einen inneren elastischen Haken (28) aufweist, der eingerichtet ist, in eine Verriegelungsaussparung (14) der Metallhalterung (3) einzugreifen.
  5. Anordnung nach Anspruch 1, wobei die Verriegelungsaussparung in der Form eines Langlochs (14) vorliegt, das am Ende eines länglichen Metallausläufers (13) ausgebildet ist, der sich von der Seite des Ankopplungsbereiches der Anschlusseinheit an der Halterung (3) unter den Mehrzahl elektrischer Anschlüsse (m1-m14) im Körper (1) aus Kunststoff und den Kabelstoppererweiterungen (15, 21) der verschiebbaren Verkleidung (19), zuerst unter der Höhe der Ebene des Rests des Körpers aus Kunststoff an der Halterung erstreckt und danach über die Höhe ansteigt, um mit dem Langloch (14) zu enden, in das der elastische Haken (28) schließlich gedrückt wird, um darin einzurasten.
  6. Anordnung nach Anspruch 1, wobei der Körper (1) aus Kunststoff auf seiner Außenfläche der Seite, die der Seite des Verriegelungseingriffs gegenüberliegt, eine Halterung oder einen Haken (25) zum Anhängen eines externen Kondensators aufweist, dessen Anschlüsse durch isolierte elektrische Leitungen mit jeweiligen Anschlüssen oder männlichen Kontakten der ersten Mehrzahl verbunden sind.
  7. Anordnung nach Anspruch 1, wobei die Anschlüsse (mlm14) der ersten Mehrzahl alle männliche Faston-Kontakte mit einer parallelen Längsachse sind.
  8. Anordnung nach Anspruch 7, wobei die Leitungen des Netzkabels weibliche Faston-Kontaktenden aufweisen, die eingerichtet sind, auf jeweilige männliche Faston-Kontakte (m1-m14) der ersten Mehrzahl gesteckt zu werden.
  9. Anordnung nach Anspruch 3 wobei der Körper (1) aus Kunststoff, die verschiebbare Verkleidung (19) und die Endkappe (23) alle aus einem thermoplatischen Material bestehen, das durch Spritzgießen gebildet wird.
EP08164845A 2007-10-22 2008-09-23 Anordnung für einen elektrischen Anschluss, Starter und Schutz eines elektrischen Motorenkompressors, der mit einem hermetischen metallischen Gehäuse abgedichtet ist Not-in-force EP2053322B8 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000081A ITVA20070081A1 (it) 2007-10-22 2007-10-22 Assieme di connessione elettrica, avviamento e protezione di un moto-compressore elettrico in guscio metallico ermetico

Publications (4)

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EP2053322A2 EP2053322A2 (de) 2009-04-29
EP2053322A3 EP2053322A3 (de) 2010-12-22
EP2053322B1 true EP2053322B1 (de) 2012-03-28
EP2053322B8 EP2053322B8 (de) 2013-01-16

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EP (1) EP2053322B8 (de)
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Cited By (1)

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KR101829072B1 (ko) 2011-06-23 2018-02-13 센사타 테크놀로지스 매사추세츠, 인크. 전기모터 시동기 구성요소들의 조립체

Families Citing this family (2)

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US10700471B2 (en) * 2016-01-15 2020-06-30 Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda. System, method and means for connecting and fixing an electronic control to an airtight compressor and an airtight compressor
CN217712849U (zh) * 2021-10-25 2022-11-01 思科普有限责任公司 用于封装式制冷剂压缩机的电子控制单元和包括其的系统

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Publication number Priority date Publication date Assignee Title
EP1111316A1 (de) 1999-12-20 2001-06-27 MINU S.p.A. Zusammenbau eines Anschlussblocks zum Verbinden von motorisch angetriebenen Verdichtern, insbesondere für Kühlschränke
NZ526142A (en) 2000-12-04 2005-05-27 Brasileira De Compressores S E Constructive arrangement for the starting system of an electric motor
KR100659977B1 (ko) 2004-11-03 2006-12-26 센서스앤드컨트롤스코리아 주식회사 냉장고 압축기용 접속 패키지의 분리형 클램프 장치
KR100698762B1 (ko) 2004-11-16 2007-03-23 센서스앤드컨트롤스코리아 주식회사 냉장고 압축기용 접속 패키지
BRPI0405472A (pt) 2004-12-03 2006-07-11 Brasil Compressores Sa arranjo de montagem para sistema de partida de compressor
ITTO20050535A1 (it) 2005-07-29 2007-01-30 Itw Ind Componemts S R L Dispositivo portacontatti integrato installabile suun terminale ermetico con contatti a spillo, in paprticolare per compressori

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101829072B1 (ko) 2011-06-23 2018-02-13 센사타 테크놀로지스 매사추세츠, 인크. 전기모터 시동기 구성요소들의 조립체

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ATE551575T1 (de) 2012-04-15
EP2053322A3 (de) 2010-12-22
ITVA20070081A1 (it) 2009-04-23
EP2053322B8 (de) 2013-01-16
EP2053322A2 (de) 2009-04-29

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