WO2012041472A1 - Electrical connector for an electric compressor - Google Patents

Electrical connector for an electric compressor Download PDF

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Publication number
WO2012041472A1
WO2012041472A1 PCT/EP2011/004799 EP2011004799W WO2012041472A1 WO 2012041472 A1 WO2012041472 A1 WO 2012041472A1 EP 2011004799 W EP2011004799 W EP 2011004799W WO 2012041472 A1 WO2012041472 A1 WO 2012041472A1
Authority
WO
WIPO (PCT)
Prior art keywords
compartment
compressor
wall
terminals
compressor according
Prior art date
Application number
PCT/EP2011/004799
Other languages
French (fr)
Inventor
Augustin Bellet
Original Assignee
Valeo Thermal Systems Japan Corporation
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 Valeo Thermal Systems Japan Corporation filed Critical Valeo Thermal Systems Japan Corporation
Priority to EP11764680.2A priority Critical patent/EP2622222B1/en
Publication of WO2012041472A1 publication Critical patent/WO2012041472A1/en

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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
    • 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
    • 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
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure

Definitions

  • the technical sector of the present invention is that of compressors constituting a refrigerant circuit fitted to a motor vehicle.
  • the refrigerant fluid is conventionally circulated inside an air conditioning circuit via a compressor.
  • this compressor is mechanical type because its rotation is driven by means of a pulley connected to the internal combustion engine by a belt.
  • hybrid vehicles that is to say with an internal combustion engine coupled to an electric motor, or all electric, that is to say exclusively powered by an electric motor, is constantly increasing by the fact of rarefaction of fossil fuels that fuel vehicles equipped with internal combustion engines.
  • the electrical connection device proposed in this application presents a solution where the electrical connection between the conductor supplying the electric motor and the driver from the control device is provided inside a compartment of the compressor receiving the control device. It is therefore understood that the assembly of the compressor requires to pass through the compartment receiving the control device to electrically connect the motor to its control device.
  • this solution has the disadvantage of having a large amount of parts to assemble to ensure the electrical and mechanical connection.
  • the object of the present invention is therefore to solve the drawbacks described above mainly by electrically connecting an electrical harness from the control device with an electric harness supplying the engine on the side of the compressor compartment which receives the electric motor while guaranteeing no arcing will occur between the fluid and one of the terminals.
  • the subject of the invention is therefore a compressor comprising a first compartment housing an electric motor and separated by a wall of a second compartment housing an electric motor control device connected to the motor by an electrical connection device, the connecting device comprising a plurality of terminals connected to a plurality of elements of isolated connection of the first compartment by an innovative insulating means in that it comprises a fixing means between the insulating means and the wall, the fixing means being operable from the first compartment.
  • the insulating means provides electrical insulation to avoid any electric arc between a terminal and / or a connection element and the fluid present in the first compartment.
  • a polyalkylene glycol type lubricant can thus be used without risk.
  • Such a fixing means is for example at least one screw engaged in a tapping formed in a blind hole in the thickness of the wall located between the first compartment and the second compartment.
  • the securing action of the insulation means on the wall does not use an element that extends into the second compartment.
  • the insulating means extends against a face of the wall which faces the first compartment.
  • the plurality of terminals is electrically connected to the control device while the plurality of connection elements is electrically connected to the electric motor.
  • the isolation means provides electrical insulation and a seal against the fluid present in the first compartment.
  • the isolation means takes the form of a cover covering the plurality of terminals and the plurality of connection elements.
  • the cover comprises a housing filled with an insulating gel and in which the plurality of terminals and the plurality of connection elements extend.
  • the wall provides a sealing between the first compartment and the second compartment.
  • the passage hole of the electrical harness between the control device and the electric motor is thus the only opening between the first compartment and the second compartment.
  • the fixing means comprises at least one screw engaged with a tapping made in the wall.
  • the tapping is advantageously blind in the thickness of the wall.
  • the electrical connection device comprises a base through which the plurality of terminals extends.
  • the angular positioning of the base is provided beforehand during the assembly of the control device in the second compartment. This base is held in position by the fact that the terminals are mechanically and electrically connected, for example by welding, to rigid electrical connection elements originating or constituting the control device.
  • the base has a cylindrical section, for example circular, which facilitates the integration of the base in the wall.
  • the seal can be achieved by means of easy to use circular seal to manufacture and install.
  • the isolation means comprises a cylindrical body, preferably circular outer diameter identical to the outer diameter of the base.
  • the wall comprises a recess where the base is housed in a sealed manner.
  • the dimensional impact of the connection device on the compressor is thus reduced by juxtaposing the thickness of the wall and the thickness of the connecting device.
  • the insulating means is housed in the recess, advantageously in a sealed manner.
  • the insulating means comprises at least one protrusion arranged to cooperate with the fixing means. This arrangement is implemented by a hole in the protrusion which allows the passage of the fixing means.
  • the protuberance is formed laterally with respect to a body constituting the insulation means, advantageously the lid.
  • the wall comprises a peripheral shoulder to the recess and in which the protrusion is housed. The dimensional impact of the connection device on the compressor is further reduced.
  • the isolation means comprises means for retaining at least one of the connection elements. This structure facilitates the mounting of the isolation means by providing a pre-positioning of the connection elements with respect to the terminals at the time of mounting the insulation means on the base. Fixing the insulation means on the wall also provides a function of pressurizing a seal between the base and the recess.
  • a first advantage resulting from the possibility of ensuring the electrical connection between the motor and its control device on the side of the housing that receives the compressor lies in the possibility of ensuring the assembly and control of a first subset compressor having the control device independently of the assembly of the rest of the compressor.
  • this subset forms a semi-finished part on which no additional intervention is necessary.
  • Another advantage lies in the small number of components constituting the connecting device which makes it possible to ensure the mechanical fixing as well as the electrical connection in a single step of fixing the insulating means on the wall of the compressor which separates the compartment from receiving the control device of the receiving compartment of the electric motor.
  • FIG 1 is a schematic view of an electric compressor according to the invention
  • FIG. 2 is a front view of the wall of the compressor equipped with the connection device
  • FIG 3 is a sectional view of the connection device according to a first embodiment variant
  • FIG. 4 is a sectional view of the connection device according to a second variant embodiment.
  • FIG. 1 illustrates a schematic view of an electric compressor according to the invention and its main components.
  • the compressor 1 is an electric compressor in that it incorporates an electric motor 6 which drives a compression mechanism 7.
  • This compression mechanism 7 is of the type of compression screw (Scroll in English) or the pallet type or piston type, these examples being given for illustrative purposes without limiting the scope of the invention.
  • the compressor 1 is delimited vis-à-vis its external environment by a housing 2.
  • This housing 2 is a piece of aluminum or aluminum alloy, hollow circular shape comprising a peripheral wall which defines an internal volume.
  • This housing comprises at least three compartments which take the form of cavity or housing formed inside the housing 2. These compartments are separate volumes separated from each other by at least one wall. It will therefore be understood that these compartments can be delimited by a single peripheral part which forms the housing or, for example, by separate sub-housings dedicated to each compartment and assembled to each other to form the compressor.
  • the compressor may for example consist of a main housing, forming a first compartment 3, which houses the electric motor and on which is reported at one end, a first separate secondary housing which delimits a second compartment 4, and at a second end, a second separate secondary housing forming a third compartment 5.
  • the first compartment 3 is provided interposed between the second compartment 4 and the third compartment 5.
  • the first compartment 3 houses the electric motor 6 which comprises a stator and a rotor, the stator consisting among others of a plurality of coils.
  • a fluid or mixture consisting of a refrigerant mixed with a lubricant enters the first compartment and circulates around and in the electric motor 6.
  • the refrigerant is a subcritical fluid such as for example the R134a but it can also it is a supercritical refrigerant fluid such as, for example, carbon dioxide known under the name R744.
  • the lubricant is for example a compound Polyalkylene glycol type.
  • the fluid circulates in the first compartment 3 and then in the third compartment 5 in which there is a compression mechanism 7.
  • This compression mechanism is driven by means of a shaft 9 connected to the rotor of the electric motor 6.
  • the compression mechanism 7 comprises fixed parts and moving parts, the latter being rotated by the shaft 9 which extends along a longitudinal axis of the compressor 1. This shaft 9 therefore extends in the first and third compartment, substantially in the center of the housing 2.
  • the first compartment 3 is separated from the second compartment 4 by a wall 8 which prevents the penetration of the fluid into the second compartment. It is thus understood that the fluid present in the first compartment 3 does not circulate in the second compartment 4.
  • This second compartment 4 defines a reception zone of a control circuit 10 of the electric motor.
  • This control circuit 10 is notably an inverter (inverter in English) transforming a stream of continuous form coming from the vehicle into a stream of sinusoidal shape supplying the electric motor 6 in a perfectly sealed manner between the first compartment 3 and the second compartment 4 to withstand all possible pressure and temperature deviations during the life of the compressor.
  • the control device 10 supplies electrical energy to the electric motor 6. Since these components are in two separate compartments, it is necessary to allow the passage of a power supply beam which connects the control device 10 to the motor 6. .
  • an electrical connection device 1 1 provides an electrical connection between a plurality of terminals 12 and a plurality of connection elements 13.
  • plurality is meant in particular three terminals and three connection elements.
  • Each terminal 12 electrically connects the control device 10 to the connection elements 13 of the connection device 1 1.
  • Each terminal 12 opens into the connection device and can for example be connected directly or via at least one intermediate conductor to the control device.
  • connection 13 opens into the connection device and can be connected to a coil of the electric motor by a cable or more generally an electrical conductor, directly or indirectly.
  • connection element is removable from its terminal. It is therefore a reversible mechanical connection ensuring the passage of electric current.
  • Figure 2 shows in more detail the structure of the connecting device 1 1.
  • This device is here mounted on the wall 8 defining the first compartment of the second compartment and that view of the first compartment.
  • the wall 8 comprises a through hole inside which the connecting device 1 1 is installed.
  • the latter comprises an electrical isolation means 14 between the terminals and / or the connection elements and the fluid present in the first compartment of the engine.
  • This insulating means 14 also ensures a seal against a fluid present in the first compartment 1 to prevent it from circulating from the first compartment 3 to the second compartment 4. This sealing is provided by collaboration of the means insulation 14 with a base 20 which will be described below.
  • This isolation means 14 thus fulfills at least two functions: providing electrical isolation between the fluid and the terminals and / or the connection elements, and preventing any fluid flow from the first compartment to the second compartment.
  • This isolation means 14 covers the plurality of terminals 12 as well as the plurality of connection elements 13, the latter being each for example crimped on a flexible cable 22 consisting of a conductive core 15 trapped in an electrically insulating sheath 16, for example plastic. Sealing is also practiced between the cables 22 and the insulating means 14 by virtue of the use of a seal 37.
  • the insulation means 14 comprises a body 17 of particular circular shape. At least one protrusion 18 emerges, for example, laterally from the body 17 so as to ensure the fixing of the insulating means 14 on the wall 8.
  • the protrusion 18 forms a flat parallel to the plane in which the wall 8 and comprises for example a hole allowing the passage of the fastening means of the insulating means 14 on the wall 8 of the compressor.
  • the body 17 comprises two protuberances 18 which extend in angularly spaced directions of 70 °.
  • the wall 8 comprises a joint plane 19 which extends at the periphery of this wall. This joint plane seals between the first secondary housing constituting the second compartment and the main housing constituting the first compartment.
  • the connecting device 11 is installed immediately adjacent to this joint plane 19.
  • FIG. 3 illustrates a first exemplary embodiment of the connection device according to a section A-A shown in FIG. 2.
  • the upper part of FIG. 3 in which the cable 22 extends forms the first compartment 3 while the lower part of FIG. 3 in which a terminal 12 extends forms the second compartment 4.
  • the connecting device 11 comprises a base 20 which extends in a plane parallel to the plane of the wall 8.
  • the latter comprises a recess 21 formed in the thickness of the wall 8 around the through hole.
  • the base 20 is installed inside the recess 21 and bears against a shoulder delimiting the hole.
  • the base which may for example be metallic, comprises on its outer periphery a clearance 23 which receives a sealing means 24 whose function is to guarantee the seal between the first compartment 3 and the second compartment 4.
  • This means of sealing 24 takes for example the form of an O-ring, a flat gasket or a lip seal.
  • the base 20 is traversed from one side by the plurality of terminals 12 and the latter are secured to the base by an electrically insulating pad 25, for example made of glass.
  • an electrically insulating cover 26, for example made of ceramic, is threaded onto each terminal 12 so as to prevent any electric arc between the terminal and the edge of the wall 8 immediately adjacent to the terminal.
  • a shoulder 27 whose function is to receive the protrusion 18.
  • the insulation means 14 takes for example the form of a cover covering the plurality of terminals 12 and the plurality of Connecting elements 13.
  • This insulating means 14 takes the form of a bowl delimiting an internal volume where the connection between each terminal 12 and each connection element 13 is made.
  • the insulating means 14 may be formed of a single unitary molded piece of plastic, for example a thermoplastic polyester, but it may also be formed of an assembly of separate pieces.
  • the insulating means 14 comprises a closing cap 36 which obstructs the internal volume in which each terminal 12 and each connection element 13 extend.
  • This cover is made integral with the body 17 by gluing. or by a clipping means connecting the cover 36 to the body 17.
  • Fastening means 28 is provided for securing or securing the insulating means 14, for example by means of the protrusion 18, on a face 29 of the wall 18 facing the first compartment 3.
  • This fixing means 28 can be reversible or irreversible but must however provide a reliable mechanical resistance to prevent movement of the connection element 13 relative to the terminal concerned.
  • it may be a screw 30 whose thread is engaged on a thread 31 formed in the thickness of the wall 8, this thread being for example made in a blind hole in the wall thickness 8.
  • the fixing means 28 is operable, in particular exclusively operable, from the first compartment 3. It is understood here that the mounting of this fastening means is carried out through the first compartment 3.
  • the screw 30 is equipped with a 32 hexagonal head, recess or split which extends into the first compartment 3. It is not necessary to intervene in the second compartment to secure the insulation means on the wall.
  • Fixing the insulating means 14 by means of the fixing means 28 ensures the mechanical maintenance of the connection device 1 1. This attachment also ensures the electrical connection between each terminal 12 and each connection element 13.
  • the insulating means 14 comprises a sealing device 33 installed at the outer periphery of the body 17 so as to come into contact with the inner wall of the recess 21.
  • This sealing means 33 takes, for example the shape of an O-ring, a flat gasket or a lip seal. It is thus understood that the insulating means 14 is housed in the recess 21 in a sealed manner, that is to say to prevent the fluid (coolant mixed with the lubricant) coming into contact with the terminals 12 and / or connection elements 13.
  • the insulating means 14 further comprises a means for retaining the connecting elements 13.
  • This is for example a shape complementary to the shape of the connection element so as to ensure a mechanical holding of the element in the internal volume of the lid forming the insulating means 14. It may also be for example a clip molded on the inner wall of the cover and which mechanically retains the cable and / or the connection element concerned. .
  • FIG. 4 illustrates an alternative embodiment of FIG. 3 and reference will be made to the description of FIG. 3 for the identical elements.
  • the connecting device 1 1 of Figure 4 differs from that shown in Figure 3 in that the insulating means 14 comprises a housing 34 filled with an insulating gel 35.
  • the body 17 has an opening which opens the first compartment 3 and through which the insulating gel 35 can be introduced into the housing 34.
  • the gel is for example a compound comprising epoxy.
  • This second embodiment has the advantage of making each terminal and each connection element apparent once the connection device 1 1 is mounted against the wall 8. The contact between the terminal and the connection device can thus be visually verified. .
  • the electrically insulating gel 35 can then be introduced into the housing so as to surround each connection and ensure that the fluid will not be in contact with the electrical connection.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

The invention relates to a compressor comprising a first compartment (3) which houses an electric motor and is separated by a wall (8) from a second compartment (4) which houses a control device for the electric motor connected to the motor by an electrical connector 11, the electrical connector (11) comprising a plurality of terminals (12) connected to a plurality of connection elements (13) insulated from the first compartment (3) by an insulating means (14), characterized in that it comprises a securing means (28) between the insulating means (14) and the wall (8), the securing means (28) being operable from the first compartment (3).

Description

DISPOSITIF DE RACCORDEMENT ELECTRIQUE D'UN COMPRESSEUR  DEVICE FOR ELECTRICALLY CONNECTING A COMPRESSOR
ELECTRIQUE  ELECTRIC
Le secteur technique de la présente invention est celui des compresseurs constitutifs d'un circuit de fluide réfrigérant équipant un véhicule automobile.  The technical sector of the present invention is that of compressors constituting a refrigerant circuit fitted to a motor vehicle.
Le fluide réfrigérant est classiquement mis en circulation à l'intérieur d'un circuit de climatisation par l'intermédiaire d'un compresseur. Dans les véhicules équipés d'un moteur à combustion interne, ce compresseur est de type mécanique car sa rotation est entraînée au moyen d'une poulie reliée au moteur à combustion interne par une courroie.  The refrigerant fluid is conventionally circulated inside an air conditioning circuit via a compressor. In vehicles equipped with an internal combustion engine, this compressor is mechanical type because its rotation is driven by means of a pulley connected to the internal combustion engine by a belt.
Le nombre de véhicules hybrides, c'est-à-dire à moteur à combustion interne couplé à un moteur électrique, ou tout électrique, c'est-à-dire exclusivement propulsé par un moteur électrique, est en constante augmentation du faite de la raréfaction des énergies fossiles qui alimentent les véhicules équipés de moteur à combustion interne.  The number of hybrid vehicles, that is to say with an internal combustion engine coupled to an electric motor, or all electric, that is to say exclusively powered by an electric motor, is constantly increasing by the fact of rarefaction of fossil fuels that fuel vehicles equipped with internal combustion engines.
L'énergie mécanique fournie habituellement par le moteur à combustion interne est donc moins disponible ou complètement indisponible pour le cas des véhicules tout électrique.  The mechanical energy usually supplied by the internal combustion engine is therefore less available or completely unavailable for the case of all-electric vehicles.
Cependant, la transition entre l'utilisation d'un moteur à combustion interne et l'utilisation d'un moteur électrique de propulsion du véhicule n'est pas instantanée. En effet, un modèle de véhicule particulier peut être vendu dans une version équipée d'un moteur à combustion interne et d'un compresseur mécanique mais aussi dans une version équipée d'un moteur de propulsion de type électrique nécessitant l'emploi d'un compresseur électrique.  However, the transition between the use of an internal combustion engine and the use of an electric propulsion motor of the vehicle is not instantaneous. Indeed, a particular vehicle model can be sold in a version equipped with an internal combustion engine and a mechanical compressor but also in a version equipped with an electric propulsion engine requiring the use of a electric compressor.
Ces deux types de compresseurs sont fondés sur des technologies différentes qui requièrent l'utilisation d'un lubrifiant différent. En effet, la présence de potentielles électriques élevés dans un compresseur électrique impose l'emploi d'un lubrifiant diélectrique qui est différent du lubrifiant classiquement utilisé pour un compresseur mécanique, ce dernier perdant son pouvoir diélectrique lorsqu'il est mélangé au fluide réfrigérant.  These two types of compressors are based on different technologies that require the use of a different lubricant. Indeed, the presence of high electric potentials in an electric compressor requires the use of a dielectric lubricant which is different from the lubricant conventionally used for a mechanical compressor, the latter losing its dielectric power when it is mixed with the refrigerant.
Outre le fait que le coût de ce lubrifiant diélectrique est plus élevé que le lubrifiant classique utilisé pour un compresseur mécanique, une telle situation impose au constructeur de ce modèle de véhicule une gestion de deux types de lubrifiant au niveau de la chaîne de fabrication du véhicule. Un premier inconvénient de cette situation réside dans le fait que cette gestion de deux lubrifiants est particulièrement lourde à mettre en oeuvre et augmente la possibilité de commettre des erreurs au niveau de la chaîne de fabrication. In addition to the fact that the cost of this dielectric lubricant is higher than the conventional lubricant used for a mechanical compressor, such a situation requires the manufacturer of this vehicle model to manage two types of lubricant at the level of the vehicle production line. . A first disadvantage of this situation lies in the fact that this management of two lubricants is particularly cumbersome to implement and increases the possibility of making errors in the production line.
La demande de brevet internationale WO2009/157275 décrit un dispositif de raccordement électrique entre un moteur électrique d'un compresseur et son dispositif de commande.  International Patent Application WO2009 / 157275 discloses an electrical connection device between an electric motor of a compressor and its control device.
Le dispositif de raccordement électrique proposé dans cette demande présente une solution où le raccordement électrique entre le conducteur alimentant le moteur électrique et le conducteur en provenance du dispositif de commande est assuré à l'intérieur d'un compartiment du compresseur recevant le dispositif de commande. On comprend donc que l'assemblage du compresseur impose de passer par le compartiment recevant le dispositif de commande pour raccorder électriquement le moteur à son dispositif de commande.  The electrical connection device proposed in this application presents a solution where the electrical connection between the conductor supplying the electric motor and the driver from the control device is provided inside a compartment of the compressor receiving the control device. It is therefore understood that the assembly of the compressor requires to pass through the compartment receiving the control device to electrically connect the motor to its control device.
Ceci représente un inconvénient majeur car une telle organisation empêche une fabrication complète et séparée de la partie du compresseur contenant le dispositif de commande. En effet, le raccordement électrique intervenant au fond du compartiment, il est alors nécessaire de solidariser le dispositif de raccordement électrique avant d'installer les cartes de circuit imprimé constituant le dispositif de commande. Ainsi, il n'est pas possible de dissocier l'assemblage du dispositif de commande dans la partie du compresseur dédiée à cet effet du reste des autres opérations d'assemblage du compresseur, notamment le montage du moteur électrique.  This represents a major disadvantage because such an organization prevents a complete and separate manufacture of the part of the compressor containing the control device. Indeed, the electrical connection at the bottom of the compartment, it is then necessary to secure the electrical connection device before installing the printed circuit boards constituting the control device. Thus, it is not possible to separate the assembly of the control device in the dedicated part of the compressor from the rest of the other assembly operations of the compressor, including the mounting of the electric motor.
Par ailleurs, cette solution présente l'inconvénient de comporter une quantité importante de pièces à assembler pour assurer le raccordement électrique et mécanique.  Moreover, this solution has the disadvantage of having a large amount of parts to assemble to ensure the electrical and mechanical connection.
Le but de la présente invention est donc de résoudre les inconvénients décrits ci-dessus principalement en raccordant électriquement un faisceau électrique en provenance du dispositif de commande avec un faisceau électrique alimentant le moteur du côté du compartiment du compresseur qui reçoit le moteur électrique tout en garantissant qu'aucun arc électrique n'interviendra entre le fluide et l'un des terminaux.  The object of the present invention is therefore to solve the drawbacks described above mainly by electrically connecting an electrical harness from the control device with an electric harness supplying the engine on the side of the compressor compartment which receives the electric motor while guaranteeing no arcing will occur between the fluid and one of the terminals.
L'invention a donc pour objet un compresseur comprenant un premier compartiment logeant un moteur électrique et séparé par une paroi d'un deuxième compartiment logeant un dispositif de commande du moteur électrique relié au moteur par un dispositif de raccordement électrique, le dispositif de raccordement comprenant une pluralité de terminaux raccordée à une pluralité d'éléments de connexion isolées du premier compartiment par un moyen d'isolation innovant en ce qu'il comprend un moyen de fixation entre le moyen d'isolation et la paroi, le moyen de fixation étant opérable depuis le premier compartiment. The subject of the invention is therefore a compressor comprising a first compartment housing an electric motor and separated by a wall of a second compartment housing an electric motor control device connected to the motor by an electrical connection device, the connecting device comprising a plurality of terminals connected to a plurality of elements of isolated connection of the first compartment by an innovative insulating means in that it comprises a fixing means between the insulating means and the wall, the fixing means being operable from the first compartment.
On comprend donc ici que l'accessibilité au moyen de fixation intervient exclusivement par le compartiment du compresseur qui contient le moteur électrique. Le moyen d'isolation assure quant à lui une isolation électrique pour éviter tout arc électrique entre un terminal et/ou un élément de connexion et le fluide présent dans le premier compartiment. Un lubrifiant de type Polyalkylène glycol peut ainsi être utilisé sans risque. Un tel moyen de fixation est par exemple au moins une vis en prise dans un taraudage ménagé dans un trou borgne dans l'épaisseur de la paroi située entre le premier compartiment et le deuxième compartiment.  It is therefore understood here that accessibility to the fastening means occurs exclusively by the compressor compartment which contains the electric motor. The insulating means provides electrical insulation to avoid any electric arc between a terminal and / or a connection element and the fluid present in the first compartment. A polyalkylene glycol type lubricant can thus be used without risk. Such a fixing means is for example at least one screw engaged in a tapping formed in a blind hole in the thickness of the wall located between the first compartment and the second compartment.
L'action de solidarisation du moyen d'isolation sur la paroi ne fait ainsi pas appel à un élément qui s'étend dans le deuxième compartiment.  The securing action of the insulation means on the wall does not use an element that extends into the second compartment.
Le moyen d'isolation s'étend contre une face de la paroi qui est tournée vers le premier compartiment.  The insulating means extends against a face of the wall which faces the first compartment.
Selon une première caractéristique de l'invention, la pluralité de terminaux est raccordée électriquement au dispositif de commande alors que la pluralité d'éléments de connexion est raccordée électriquement au moteur électrique.  According to a first characteristic of the invention, the plurality of terminals is electrically connected to the control device while the plurality of connection elements is electrically connected to the electric motor.
Selon une deuxième caractéristique de l'invention, le moyen d'isolation assure une isolation électrique et une étanchéité vis-à-vis du fluide présent dans le premier compartiment.  According to a second characteristic of the invention, the isolation means provides electrical insulation and a seal against the fluid present in the first compartment.
Selon une autre caractéristique de l'invention, le moyen d'isolation prend la forme d'un couvercle couvrant la pluralité de terminaux et la pluralité d'éléments de connexion.  According to another characteristic of the invention, the isolation means takes the form of a cover covering the plurality of terminals and the plurality of connection elements.
Selon encore une caractéristique de l'invention, le couvercle comprend un logement remplit d'un gel isolant et dans lequel s'étendent la pluralité de terminaux et la pluralité d'éléments de connexion.  According to another characteristic of the invention, the cover comprises a housing filled with an insulating gel and in which the plurality of terminals and the plurality of connection elements extend.
Selon encore une autre caractéristique de l'invention, la paroi assure une étanchéité entre le premier compartiment et le deuxième compartiment. Le trou de passage du faisceau électrique entre le dispositif de commande et le moteur électrique est ainsi la seule ouverture entre le premier compartiment et le deuxième compartiment. According to yet another characteristic of the invention, the wall provides a sealing between the first compartment and the second compartment. The passage hole of the electrical harness between the control device and the electric motor is thus the only opening between the first compartment and the second compartment.
Avantageusement, le moyen de fixation comprend au moins une vis en prise sur un taraudage pratiqué dans la paroi. Le taraudage est avantageusement borgne dans l'épaisseur de la paroi.  Advantageously, the fixing means comprises at least one screw engaged with a tapping made in the wall. The tapping is advantageously blind in the thickness of the wall.
Avantageusement encore, le dispositif de raccordement électrique comprend une embase au travers de laquelle la pluralité de terminaux s'étend. Le positionnement angulaire de l'embase est assuré préalablement durant l'assemblage du dispositif de commande dans le deuxième compartiment. Cette embase est maintenue en position par le fait que les terminaux sont raccordés mécaniquement et électriquement, par exemple par soudage, à des éléments de connexion électrique rigide issus ou constitutifs du dispositif de commande.  Advantageously, the electrical connection device comprises a base through which the plurality of terminals extends. The angular positioning of the base is provided beforehand during the assembly of the control device in the second compartment. This base is held in position by the fact that the terminals are mechanically and electrically connected, for example by welding, to rigid electrical connection elements originating or constituting the control device.
L'embase présente une section cylindrique, par exemple circulaire, ce qui facilite l'intégration de l'embase dans la paroi. L'étanchéité peut ainsi être réalisée au moyen de joint circulaire aisé à fabriquer et à installer. On notera que dans un tel cas, le moyen d'isolation comprend un corps cylindrique, avantageusement circulaire de diamètre externe identique au diamètre externe de l'embase.  The base has a cylindrical section, for example circular, which facilitates the integration of the base in the wall. The seal can be achieved by means of easy to use circular seal to manufacture and install. Note that in such a case, the isolation means comprises a cylindrical body, preferably circular outer diameter identical to the outer diameter of the base.
Selon une première caractéristique de l'invention, la paroi comprend un évidement où l'embase se loge de manière étanche. On diminue ainsi l'impact dimensionnel du dispositif de raccordement sur le compresseur en juxtaposant l'épaisseur de la paroi et l'épaisseur du dispositif de raccordement.  According to a first characteristic of the invention, the wall comprises a recess where the base is housed in a sealed manner. The dimensional impact of the connection device on the compressor is thus reduced by juxtaposing the thickness of the wall and the thickness of the connecting device.
Selon une deuxième caractéristique de l'invention, le moyen d'isolation se loge dans l'évidement, avantageusement de manière étanche.  According to a second characteristic of the invention, the insulating means is housed in the recess, advantageously in a sealed manner.
Selon une autre caractéristique de l'invention, le moyen d'isolation comprend au moins une excroissance agencée pour coopérer avec le moyen de fixation. Cet agencement est mis en oeuvre par un trou pratiqué dans l'excroissance qui autorise le passage du moyen de fixation.  According to another characteristic of the invention, the insulating means comprises at least one protrusion arranged to cooperate with the fixing means. This arrangement is implemented by a hole in the protrusion which allows the passage of the fixing means.
Selon encore une caractéristique de l'invention, l'excroissance est formée latéralement par rapport à un corps constituant le moyen d'isolation, avantageusement le couvercle.  According to another characteristic of the invention, the protuberance is formed laterally with respect to a body constituting the insulation means, advantageously the lid.
Selon encore une autre caractéristique de l'invention, la paroi comprend un épaulement périphérique à l'évidement et dans lequel se loge l'excroissance. On réduit encore plus l'impact dimensionnel du dispositif de raccordement sur le compresseur. According to yet another characteristic of the invention, the wall comprises a peripheral shoulder to the recess and in which the protrusion is housed. The dimensional impact of the connection device on the compressor is further reduced.
Enfin, le moyen d'isolation comprend un moyen de retenu d'au moins un des éléments de connexion. Cette structure facilite le montage du moyen d'isolation en offrant un pré-positionnement des éléments de connexion par rapport aux terminaux au moment du montage du moyen d'isolation sur l'embase. La fixation du moyen d'isolation sur la paroi assure également une fonction de mise en pression d'un joint d'étanchéité entre l'embase et l'évidement.  Finally, the isolation means comprises means for retaining at least one of the connection elements. This structure facilitates the mounting of the isolation means by providing a pre-positioning of the connection elements with respect to the terminals at the time of mounting the insulation means on the base. Fixing the insulation means on the wall also provides a function of pressurizing a seal between the base and the recess.
Un tout premier avantage résultant de la possibilité d'assurer la connexion électrique entre le moteur et son dispositif de commande du côté du logement qui reçoit le compresseur réside dans la possibilité d'assurer l'assemblage et le contrôle d'un premier sous-ensemble du compresseur comportant le dispositif de commande indépendamment de l'assemblage du reste du compresseur. Ainsi, ce sous-ensemble forme une pièce semi-finie sur laquelle aucune intervention supplémentaire n'est nécessaire.  A first advantage resulting from the possibility of ensuring the electrical connection between the motor and its control device on the side of the housing that receives the compressor lies in the possibility of ensuring the assembly and control of a first subset compressor having the control device independently of the assembly of the rest of the compressor. Thus, this subset forms a semi-finished part on which no additional intervention is necessary.
Un autre avantage réside dans le faible nombre de composant constituant le dispositif de raccordement ce qui permet d'assurer la fixation mécanique ainsi que la connexion électrique selon une unique étape de fixation du moyen d'isolation sur la paroi du compresseur qui sépare le compartiment de réception du dispositif de commande du compartiment de réception du moteur électrique.  Another advantage lies in the small number of components constituting the connecting device which makes it possible to ensure the mechanical fixing as well as the electrical connection in a single step of fixing the insulating means on the wall of the compressor which separates the compartment from receiving the control device of the receiving compartment of the electric motor.
D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement à la lecture de la description donnée ci-après à titre indicatif en relation avec des dessins dans lesquels :  Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below as an indication in relation to drawings in which:
-la figure 1 est une vue schématique d'un compresseur électrique selon l'invention,  FIG 1 is a schematic view of an electric compressor according to the invention,
-la figure 2 est une vue de face de la paroi du compresseur équipée du dispositif de raccordement,  FIG. 2 is a front view of the wall of the compressor equipped with the connection device,
-la figure 3 est une vue en coupe du dispositif de raccordement selon une première variante de réalisation,  FIG 3 is a sectional view of the connection device according to a first embodiment variant,
-la figure 4 est une vue en coupe du dispositif de raccordement selon une deuxième variante de réalisation.  FIG. 4 is a sectional view of the connection device according to a second variant embodiment.
Il faut noter que les figures exposent l'invention de manière détaillée pour mettre en œuvre l'invention, lesdites figures pouvant bien entendu servir à mieux définir l'invention le cas échéant. It should be noted that the figures show the invention in detail for implement the invention, said figures can of course be used to better define the invention where appropriate.
La figure 1 illustre une vue schématique d'un compresseur électrique selon l'invention et de ses principaux composants. Le compresseur 1 est un compresseur électrique en ce sens qu'il intègre un moteur électrique 6 qui entraîne un mécanisme de compression 7. Ce mécanisme de compression 7 est du type à vis de compression (Scroll en anglais) ou du type à palettes ou encore du type à pistons, ces exemples étant donnés à titre illustratif sans pour autant limiter la portée de l'invention.  Figure 1 illustrates a schematic view of an electric compressor according to the invention and its main components. The compressor 1 is an electric compressor in that it incorporates an electric motor 6 which drives a compression mechanism 7. This compression mechanism 7 is of the type of compression screw (Scroll in English) or the pallet type or piston type, these examples being given for illustrative purposes without limiting the scope of the invention.
Le compresseur 1 est délimité vis-à-vis de son environnement extérieur par un boîtier 2. Ce boîtier 2 est une pièce en aluminium ou en alliage d'aluminium, de forme circulaire creuse comprenant une paroi périphérique qui délimite un volume interne. Ce boîtier comprend au moins trois compartiments qui prennent la forme de cavité ou de logement pratiqué à l'intérieur du boîtier 2. Ces compartiments sont des volumes distincts séparés les uns des autres par au moins une paroi. On comprendra donc que ces compartiments peuvent être délimités par une unique pièce périphérique qui forme le boîtier ou, par exemple, par des sous-boîtiers distincts dédiés à chaque compartiment et assemblés les uns aux autres pour former le compresseur. Autrement dit, le compresseur peut par exemple être constitué d'un boîtier principal, formant un premier compartiment 3, qui loge le moteur électrique et sur lequel on rapporte, à une extrémité, un premier boîtier secondaire distinct qui délimite un deuxième compartiment 4, et à une seconde extrémité, un second boîtier secondaire distinct formant un troisième compartiment 5.  The compressor 1 is delimited vis-à-vis its external environment by a housing 2. This housing 2 is a piece of aluminum or aluminum alloy, hollow circular shape comprising a peripheral wall which defines an internal volume. This housing comprises at least three compartments which take the form of cavity or housing formed inside the housing 2. These compartments are separate volumes separated from each other by at least one wall. It will therefore be understood that these compartments can be delimited by a single peripheral part which forms the housing or, for example, by separate sub-housings dedicated to each compartment and assembled to each other to form the compressor. In other words, the compressor may for example consist of a main housing, forming a first compartment 3, which houses the electric motor and on which is reported at one end, a first separate secondary housing which delimits a second compartment 4, and at a second end, a second separate secondary housing forming a third compartment 5.
Le premier compartiment 3 est prévu intercalé entre le deuxième compartiment 4 et le troisième compartiment 5. Le premier compartiment 3 loge le moteur électrique 6 qui comprend un stator et un rotor, le stator étant entre autre constitué d'une pluralité de bobines. En fonctionnement, un fluide ou mélange constitué d'un fluide réfrigérant mélangé à un lubrifiant entre dans le premier compartiment et circule autour et dans le moteur électrique 6. Le fluide réfrigérant est un fluide sous critique tel que par exemple le R134a mais il peut également s'agir d'un fluide réfrigérant super-critique tel que par exemple le dioxyde de carbone connu sous l'appellation R744. Le lubrifiant est par exemple un composé de type Polyalkylène glycol. The first compartment 3 is provided interposed between the second compartment 4 and the third compartment 5. The first compartment 3 houses the electric motor 6 which comprises a stator and a rotor, the stator consisting among others of a plurality of coils. In operation, a fluid or mixture consisting of a refrigerant mixed with a lubricant enters the first compartment and circulates around and in the electric motor 6. The refrigerant is a subcritical fluid such as for example the R134a but it can also it is a supercritical refrigerant fluid such as, for example, carbon dioxide known under the name R744. The lubricant is for example a compound Polyalkylene glycol type.
Le fluide circule dans le premier compartiment 3 puis dans le troisième compartiment 5 dans lequel on trouve un mécanisme de compression 7. Ce dernier assure l'augmentation de pression et de température nécessaire au fonctionnement d'une boucle thermodynamique comprenant le compresseur selon l'invention. Ce mécanisme de compression est entraîné au moyen d'un arbre 9 relié au rotor du moteur électrique 6.  The fluid circulates in the first compartment 3 and then in the third compartment 5 in which there is a compression mechanism 7. This ensures the increase in pressure and temperature necessary for the operation of a thermodynamic loop comprising the compressor according to the invention . This compression mechanism is driven by means of a shaft 9 connected to the rotor of the electric motor 6.
Le mécanisme de compression 7 comprend des pièces fixes et des pièces mobiles, ces dernières étant mises en rotation par l'arbre 9 qui s'étend selon un axe longitudinal du compresseur 1. Cet arbre 9 s'étend donc dans le premier et le troisième compartiment, sensiblement au centre du boîtier 2.  The compression mechanism 7 comprises fixed parts and moving parts, the latter being rotated by the shaft 9 which extends along a longitudinal axis of the compressor 1. This shaft 9 therefore extends in the first and third compartment, substantially in the center of the housing 2.
Le premier compartiment 3 est séparé du deuxième compartiment 4 par une paroi 8 qui empêche la pénétration du fluide dans le deuxième compartiment. On comprend donc que le fluide présent dans le premier compartiment 3 ne circule pas dans le deuxième compartiment 4.  The first compartment 3 is separated from the second compartment 4 by a wall 8 which prevents the penetration of the fluid into the second compartment. It is thus understood that the fluid present in the first compartment 3 does not circulate in the second compartment 4.
Ce deuxième compartiment 4 délimite une zone de réception d'un circuit de commande 10 du moteur électrique. Ce circuit de commande 10 est notamment un onduleur (Inverter en anglais) transformant un courant de forme continue en provenance du véhicule en un courant de forme sinusoïdale alimentant le moteur électrique 6 d'une manière parfaitement étanche entre le premier compartiment 3 et le deuxième compartiment 4 pour supporter tous les écarts de pression et de température possible durant la vie du compresseur.  This second compartment 4 defines a reception zone of a control circuit 10 of the electric motor. This control circuit 10 is notably an inverter (inverter in English) transforming a stream of continuous form coming from the vehicle into a stream of sinusoidal shape supplying the electric motor 6 in a perfectly sealed manner between the first compartment 3 and the second compartment 4 to withstand all possible pressure and temperature deviations during the life of the compressor.
Le dispositif de commande 10 fournit l'énergie électrique au moteur électrique 6. Comme ces composants sont dans deux compartiments distincts, il est nécessaire d'autoriser le passage d'un faisceau d'alimentation électrique qui relie le dispositif de commande 10 au moteur 6.  The control device 10 supplies electrical energy to the electric motor 6. Since these components are in two separate compartments, it is necessary to allow the passage of a power supply beam which connects the control device 10 to the motor 6. .
Pour ce faire, un dispositif de raccordement électrique 1 1 assure une connexion électrique entre une pluralité de terminaux 12 et une pluralité d'éléments de connexion 13. Par pluralité, on entend notamment trois terminaux et trois éléments de connexion.  To do this, an electrical connection device 1 1 provides an electrical connection between a plurality of terminals 12 and a plurality of connection elements 13. By plurality is meant in particular three terminals and three connection elements.
Chaque terminal 12 relie électriquement le dispositif de commande 10 aux éléments de connexion 13 du dispositif de raccordement 1 1. Chaque terminal 12 débouche dans le dispositif de raccordement et peut par exemple être relié directement, ou via au moins un conducteur intermédiaire, au dispositif de commande. Each terminal 12 electrically connects the control device 10 to the connection elements 13 of the connection device 1 1. Each terminal 12 opens into the connection device and can for example be connected directly or via at least one intermediate conductor to the control device.
Chaque connexion 13 débouche dans le dispositif de raccordement et peut être relié à une bobine du moteur électrique par un câble ou plus généralement un conducteur électrique, de manière directe ou indirecte.  Each connection 13 opens into the connection device and can be connected to a coil of the electric motor by a cable or more generally an electrical conductor, directly or indirectly.
On notera enfin que chaque élément de connexion est amovible de son terminal. Il s'agit donc d'une liaison mécanique réversible assurant le passage du courant électrique.  Finally, note that each connection element is removable from its terminal. It is therefore a reversible mechanical connection ensuring the passage of electric current.
La figure 2 montre plus en détails la structure du dispositif de raccordement 1 1. Ce dispositif est ici monté sur la paroi 8 délimitant le premier compartiment du deuxième compartiment et ce, vue du premier compartiment.  Figure 2 shows in more detail the structure of the connecting device 1 1. This device is here mounted on the wall 8 defining the first compartment of the second compartment and that view of the first compartment.
La paroi 8 comprend un trou traversant à l'intérieur duquel le dispositif de raccordement 1 1 est installé. Ce dernier comprend un moyen d'isolation 14 électrique entre les terminaux et/ou les éléments de connexion et le fluide présent dans le premier compartiment du moteur. Ce moyen d'isolation 14 assure également une étanchéité vis-à-vis d'un fluide présent dans le premier compartiment 1 pour l'empêcher de circuler du premier compartiment 3 vers le deuxième compartiment 4. Cette étanchéité est assurée par collaboration du moyen d'isolation 14 avec une embase 20 qui sera décrite ci-dessous.  The wall 8 comprises a through hole inside which the connecting device 1 1 is installed. The latter comprises an electrical isolation means 14 between the terminals and / or the connection elements and the fluid present in the first compartment of the engine. This insulating means 14 also ensures a seal against a fluid present in the first compartment 1 to prevent it from circulating from the first compartment 3 to the second compartment 4. This sealing is provided by collaboration of the means insulation 14 with a base 20 which will be described below.
Ce moyen d'isolation 14 remplit donc au moins deux fonctions : assurer l'isolation électrique entre le fluide et les terminaux et/ou les éléments de connexion, et empêcher toute circulation de fluide depuis le premier compartiment vers le deuxième compartiment.  This isolation means 14 thus fulfills at least two functions: providing electrical isolation between the fluid and the terminals and / or the connection elements, and preventing any fluid flow from the first compartment to the second compartment.
Ce moyen d'isolation 14 couvre la pluralité de terminaux 12 ainsi que la pluralité d'éléments de connexion 13, ces derniers étant chacun par exemple serti sur une câble flexible 22 constitué d'une âme conductrice 15 emprisonnée dans une gaine électriquement isolante 16, par exemple en plastique. Une étanchéité est aussi pratiquée entre les câbles 22 et le moyen d'isolation 14 grâce à l'emploi d'un joint d'étanchéité 37.  This isolation means 14 covers the plurality of terminals 12 as well as the plurality of connection elements 13, the latter being each for example crimped on a flexible cable 22 consisting of a conductive core 15 trapped in an electrically insulating sheath 16, for example plastic. Sealing is also practiced between the cables 22 and the insulating means 14 by virtue of the use of a seal 37.
Le moyen d'isolation 14 comprend un corps 17 de forme notamment circulaire. Au moins une excroissance 18 débouche par exemple latéralement du corps 17 de sorte à assurer la fixation du moyen d'isolation 14 sur la paroi 8.  The insulation means 14 comprises a body 17 of particular circular shape. At least one protrusion 18 emerges, for example, laterally from the body 17 so as to ensure the fixing of the insulating means 14 on the wall 8.
L'excroissance 18 forme un plat parallèle au plan dans lequel s'étend la paroi 8 et comprend par exemple un trou autorisant le passage du moyen de fixation du moyen d'isolation 14 sur la paroi 8 du compresseur. The protrusion 18 forms a flat parallel to the plane in which the wall 8 and comprises for example a hole allowing the passage of the fastening means of the insulating means 14 on the wall 8 of the compressor.
Dans l'exemple de la figure 2, le corps 17 comprend deux excroissances 18 qui s'étendent selon des directions espacées angulairement de 70°.  In the example of Figure 2, the body 17 comprises two protuberances 18 which extend in angularly spaced directions of 70 °.
Bien entendu, la description ci-dessus forme un exemple de réalisation mais il est clair que toutes autres formes du moyen d'isolation est couverte par l'invention pour autant qu'elle peut être solidarisée sur la paroi du compresseur et assurer l'isolation électrique entre au moins un terminal ou élément de connexion et le fluide présent dans le premier compartiment.  Of course, the description above forms an embodiment, but it is clear that all other forms of the insulation means are covered by the invention as long as it can be secured to the wall of the compressor and ensure the insulation. electrical connection between at least one terminal or connecting element and the fluid present in the first compartment.
Enfin, on notera que la paroi 8 comprend un plan de joint 19 qui s'étend à la périphérie de cette paroi. Ce plan de joint assure l'étanchéité entre le premier boîtier secondaire constitutif du deuxième compartiment et le boîtier principal constitutif du premier compartiment. Le dispositif de raccordement 11 est installé de manière immédiatement adjacente à ce plan de joint 19.  Finally, it will be noted that the wall 8 comprises a joint plane 19 which extends at the periphery of this wall. This joint plane seals between the first secondary housing constituting the second compartment and the main housing constituting the first compartment. The connecting device 11 is installed immediately adjacent to this joint plane 19.
La figure 3 illustre un premier exemple de réalisation du dispositif de raccordement selon une coupe A-A montrée sur la figure 2.  FIG. 3 illustrates a first exemplary embodiment of the connection device according to a section A-A shown in FIG. 2.
La partie supérieure de la figure 3 dans laquelle s'étend le câble 22 forme le premier compartiment 3 alors que la partie inférieure de la figure 3 dans laquelle s'étend un terminal 12 forme le deuxième compartiment 4.  The upper part of FIG. 3 in which the cable 22 extends forms the first compartment 3 while the lower part of FIG. 3 in which a terminal 12 extends forms the second compartment 4.
Le dispositif de raccordement 11 comprend une embase 20 qui s'étend dans un plan parallèle au plan de la paroi 8. Cette dernière comporte un évidement 21 pratiqué dans l'épaisseur de la paroi 8 autour du trou traversant.  The connecting device 11 comprises a base 20 which extends in a plane parallel to the plane of the wall 8. The latter comprises a recess 21 formed in the thickness of the wall 8 around the through hole.
L'embase 20 est installée à l'intérieur de l'évidement 21 et en appui contre un épaulement délimitant le trou. L'embase, qui peut par exemple être métallique, comprend sur sa périphérie externe un dégagement 23 qui reçoit un moyen d'étanchéité 24 dont la fonction est de garantir l'étanchéité entre le premier compartiment 3 et le deuxième compartiment 4. Ce moyen d'étanchéité 24 prend par exemple la forme d'un joint torique, un joint plat ou un joint à lèvres.  The base 20 is installed inside the recess 21 and bears against a shoulder delimiting the hole. The base, which may for example be metallic, comprises on its outer periphery a clearance 23 which receives a sealing means 24 whose function is to guarantee the seal between the first compartment 3 and the second compartment 4. This means of sealing 24 takes for example the form of an O-ring, a flat gasket or a lip seal.
L'embase 20 est traversée de part en part par la pluralité de terminaux 12 et ces derniers sont rendus solidaires de l'embase par un plot électriquement isolant 25, par exemple fabriqué en verre. En complément, un cache électriquement isolant 26, par exemple fabriqué en céramique, est enfilé sur chaque terminal 12 de sorte à empêcher tout arc électrique entre le terminal et le bord de la paroi 8 immédiatement adjacent du terminal. The base 20 is traversed from one side by the plurality of terminals 12 and the latter are secured to the base by an electrically insulating pad 25, for example made of glass. In addition, an electrically insulating cover 26, for example made of ceramic, is threaded onto each terminal 12 so as to prevent any electric arc between the terminal and the edge of the wall 8 immediately adjacent to the terminal.
A la périphérie de l'évidement 21 est pratiqué un épaulement 27 dont la fonction est de recevoir l'excroissance 18. Le moyen d'isolation 14 prend par exemple la forme d'un couvercle couvrant la pluralité de terminaux 12 et la pluralité d'éléments de connexion 13. Ce moyen d'isolation 14 prend une forme de cuvette délimitant un volume interne où le raccordement entre chaque terminal 12 et chaque élément de connexion 13 est effectué. En position assemblée, l'excroissance 18 est en appui sur le fond de l'épaulement 27 et le corps 17 est en appui sur une des faces de l'embase 20.  At the periphery of the recess 21 is formed a shoulder 27 whose function is to receive the protrusion 18. The insulation means 14 takes for example the form of a cover covering the plurality of terminals 12 and the plurality of Connecting elements 13. This insulating means 14 takes the form of a bowl delimiting an internal volume where the connection between each terminal 12 and each connection element 13 is made. In the assembled position, the protrusion 18 bears against the bottom of the shoulder 27 and the body 17 bears against one of the faces of the base 20.
Le moyen d'isolation 14 peut être formé d'une seule pièce unitaire moulée en plastique, par exemple un polyester thermoplastique, mais il peut également être formé d'un assemblage de pièces distinctes. Dans le cas de la figure 3, le moyen d'isolation 14 comprend un capot de fermeture 36 qui obstrue le volume interne dans lequel s'étendent chaque terminal 12 et chaque élément de connexion 13. Ce capot est rendu solidaire du corps 17 par collage ou par un moyen de clippage reliant le capot 36 au corps 17.  The insulating means 14 may be formed of a single unitary molded piece of plastic, for example a thermoplastic polyester, but it may also be formed of an assembly of separate pieces. In the case of FIG. 3, the insulating means 14 comprises a closing cap 36 which obstructs the internal volume in which each terminal 12 and each connection element 13 extend. This cover is made integral with the body 17 by gluing. or by a clipping means connecting the cover 36 to the body 17.
Un moyen de fixation 28 est prévu pour solidariser ou fixer le moyen d'isolation 14, par exemple au moyen de l'excroissance 18, sur une face 29 de la paroi 18 tournée vers le premier compartiment 3. Ce moyen de fixation 28 peut être réversible ou irréversible mais doit cependant assurer une tenue mécanique fiable pour éviter tout mouvement de l'élément de connexion 13 par rapport au terminal concerné. A titre d'exemple, il peut s'agir d'une vis 30 dont le filetage est en prise sur un taraudage 31 pratiqué dans l'épaisseur de la paroi 8, ce taraudage étant par exemple réalisé dans un trou borgne ménagé dans l'épaisseur de la paroi 8.  Fastening means 28 is provided for securing or securing the insulating means 14, for example by means of the protrusion 18, on a face 29 of the wall 18 facing the first compartment 3. This fixing means 28 can be reversible or irreversible but must however provide a reliable mechanical resistance to prevent movement of the connection element 13 relative to the terminal concerned. For example, it may be a screw 30 whose thread is engaged on a thread 31 formed in the thickness of the wall 8, this thread being for example made in a blind hole in the wall thickness 8.
Le moyen de fixation 28 est opérable, notamment exclusivement opérable, depuis le premier compartiment 3. On comprend ici que le montage de ce moyen de fixation est effectué en passant par le premier compartiment 3. Par exemple, la vis 30 est équipée d'une tête 32 hexagonale, à empreinte cruciforme ou fendue qui s'étend dans le premier compartiment 3. Il n'est ainsi pas nécessaire d'intervenir dans le deuxième compartiment pour solidariser le moyen d'isolation sur la paroi.  The fixing means 28 is operable, in particular exclusively operable, from the first compartment 3. It is understood here that the mounting of this fastening means is carried out through the first compartment 3. For example, the screw 30 is equipped with a 32 hexagonal head, recess or split which extends into the first compartment 3. It is not necessary to intervene in the second compartment to secure the insulation means on the wall.
La fixation du moyen d'isolation 14 à l'aide du moyen de fixation 28 assure le maintien mécanique du dispositif de raccordement 1 1. Cette fixation assure également le lien électrique entre chaque terminal 12 et chaque élément de connexion 13. Fixing the insulating means 14 by means of the fixing means 28 ensures the mechanical maintenance of the connection device 1 1. This attachment also ensures the electrical connection between each terminal 12 and each connection element 13.
De manière optionnelle, le moyen d'isolation 14 comprend un dispositif d'étanchéité 33 installé à la périphérie externe du corps 17 de manière à venir en contact contre la paroi interne de l'évidement 21. Ce moyen d'étanchéité 33 prend par exemple la forme d'un joint torique, un joint plat ou un joint à lèvres. On comprend ainsi que le moyen d'isolation 14 se loge dans l'évidement 21 de manière étanche, c'est-à-dire pour empêcher que le fluide (fluide réfrigérant mélangé au lubrifiant) ne vienne en contact des terminaux 12 et/ou des éléments de connexion 13.  Optionally, the insulating means 14 comprises a sealing device 33 installed at the outer periphery of the body 17 so as to come into contact with the inner wall of the recess 21. This sealing means 33 takes, for example the shape of an O-ring, a flat gasket or a lip seal. It is thus understood that the insulating means 14 is housed in the recess 21 in a sealed manner, that is to say to prevent the fluid (coolant mixed with the lubricant) coming into contact with the terminals 12 and / or connection elements 13.
Le moyen d'isolation 14 comprend un outre un moyen de retenue des éléments de connexion 13. Il s'agit par exemple d'une forme complémentaire de la forme de l'élément de connexion de sorte à assurer un maintien mécanique de l'élément de connexion dans le volume interne du couvercle formant le moyen d'isolation 14. Il peut également s'agir par exemple d'un clip moulé sur la paroi interne du couvercle et qui retient mécaniquement le câble et/ou l'élément de connexion concerné.  The insulating means 14 further comprises a means for retaining the connecting elements 13. This is for example a shape complementary to the shape of the connection element so as to ensure a mechanical holding of the element in the internal volume of the lid forming the insulating means 14. It may also be for example a clip molded on the inner wall of the cover and which mechanically retains the cable and / or the connection element concerned. .
La figure 4 illustre une variante de réalisation de la figure 3 et on se reportera à la description de la figure 3 pour les éléments identiques.  FIG. 4 illustrates an alternative embodiment of FIG. 3 and reference will be made to the description of FIG. 3 for the identical elements.
Le dispositif de raccordement 1 1 de la figure 4 diffère de celui représenté sur la figure 3 en ce que le moyen d'isolation 14 comprend un logement 34 remplit d'un gel isolant 35. Dans cette situation, le corps 17 présente une ouverture qui débouche côté premier compartiment 3 et au travers de laquelle le gel isolant 35 peut être introduit dans le logement 34. Le gel est par exemple un composé comprenant de l'époxy.  The connecting device 1 1 of Figure 4 differs from that shown in Figure 3 in that the insulating means 14 comprises a housing 34 filled with an insulating gel 35. In this situation, the body 17 has an opening which opens the first compartment 3 and through which the insulating gel 35 can be introduced into the housing 34. The gel is for example a compound comprising epoxy.
Cette seconde variante de réalisation présente l'avantage de rendre apparent chaque terminal et chaque élément de connexion une fois que le dispositif de raccordement 1 1 est monté contre la paroi 8. Le contact entre le terminal et le dispositif de raccordement peut ainsi être vérifié visuellement. Le gel électriquement isolant 35 peut alors être introduit dans le logement de sorte à entourer chaque connexion et garantir que le fluide ne sera pas en contact avec la connexion électrique.  This second embodiment has the advantage of making each terminal and each connection element apparent once the connection device 1 1 is mounted against the wall 8. The contact between the terminal and the connection device can thus be visually verified. . The electrically insulating gel 35 can then be introduced into the housing so as to surround each connection and ensure that the fluid will not be in contact with the electrical connection.

Claims

REVENDICATIONS
1. Compresseur (1) comprenant un premier compartiment (3) logeant un moteur électrique (6) et séparé par une paroi (8) d'un deuxième compartiment (4) logeant un dispositif de commande (10) du moteur électrique relié au moteur (6) par un dispositif de raccordement électrique (11), le dispositif de raccordement électrique (11) comprenant une pluralité de terminaux (12) raccordée à une pluralité d'éléments de connexion (13) isolées du premier compartiment (3) par un moyen d'isolation (14) caractérisé en ce qu'il comprend un moyen de fixation (28) entre le moyen d'isolation (14) et la paroi (8), le moyen de fixation (28) étant opérable depuis le premier compartiment (3).  1. Compressor (1) comprising a first compartment (3) housing an electric motor (6) and separated by a wall (8) of a second compartment (4) housing a control device (10) of the electric motor connected to the engine (6) by an electrical connection device (11), the electrical connection device (11) comprising a plurality of terminals (12) connected to a plurality of connection elements (13) isolated from the first compartment (3) by a insulation means (14) characterized in that it comprises a fixing means (28) between the insulating means (14) and the wall (8), the fastening means (28) being operable from the first compartment (3).
2. Compresseur selon la revendication 1 , dans lequel la pluralité de terminaux (12) est raccordée électriquement au dispositif de commande (10) alors que la pluralité d'éléments de connexion (13) est raccordée électriquement au moteur électrique (6).  The compressor according to claim 1, wherein the plurality of terminals (12) is electrically connected to the controller (10) while the plurality of connection elements (13) is electrically connected to the electric motor (6).
3. Compresseur selon l'une des revendications 1 ou 2, dans lequel le moyen d'isolation (14) assure une isolation électrique et une étanchéité vis-à-vis d'un fluide présent dans le premier compartiment (3).  3. Compressor according to one of claims 1 or 2, wherein the insulating means (14) provides electrical isolation and sealing vis-à-vis a fluid present in the first compartment (3).
4. Compresseur selon l'une quelconque des revendications 1 à 3, dans lequel le moyen d'isolation (14) prend la forme d'un couvercle couvrant la pluralité de terminaux (12) et la pluralité d'éléments de connexion (13).  The compressor according to any one of claims 1 to 3, wherein the insulating means (14) takes the form of a cover covering the plurality of terminals (12) and the plurality of connection elements (13). .
5. Compresseur selon la revendication 4, dans lequel le couvercle comprend un logement (34) remplit d'un gel isolant (35) et dans lequel s'étendent la pluralité de terminaux (12) et la pluralité d'éléments de connexion (13).  5. The compressor according to claim 4, wherein the cover comprises a housing (34) filled with an insulating gel (35) and in which the plurality of terminals (12) and the plurality of connection elements (13) extend. ).
6. Compresseur selon l'une quelconque des revendications précédentes, dans lequel la paroi (8) assure une étanchéité entre le premier compartiment (3) et le deuxième compartiment (4).  6. Compressor according to any one of the preceding claims, wherein the wall (8) provides a seal between the first compartment (3) and the second compartment (4).
7. Compresseur selon l'une quelconque des revendications précédentes, dans lequel le dispositif de raccordement électrique (11) comprend une embase (20) au travers de laquelle la pluralité de terminaux (12) s'étend.  The compressor according to any one of the preceding claims, wherein the electrical connection device (11) comprises a base (20) through which the plurality of terminals (12) extends.
8. Compresseur selon la revendication 7, dans lequel la paroi (8) comprend un évidement (21) où l'embase (20) se loge de manière étanche.  8. The compressor of claim 7, wherein the wall (8) comprises a recess (21) wherein the base (20) is housed in a sealed manner.
9. Compresseur selon la revendication 8, dans lequel le moyen d'isolation (14) se loge dans l'évidement (21). 9. The compressor of claim 8, wherein the insulating means (14) is housed in the recess (21).
10. Compresseur selon l'une quelconque des revendications précédentes, dans lequel le moyen d'isolation (14) comprend au moins une excroissance (18) agencée pour coopérer avec le moyen de fixation (28). 10. Compressor according to any one of the preceding claims, wherein the insulating means (14) comprises at least one protrusion (18) arranged to cooperate with the fastening means (28).
11. Compresseur selon la revendication 10, dans lequel l'excroissance (18) est formée latéralement par rapport à un corps (17) constituant le moyen d'isolation (14).  11. The compressor of claim 10, wherein the protrusion (18) is formed laterally with respect to a body (17) constituting the insulating means (14).
12. Compresseur selon l'une quelconque des revendications 8 à 9 combinée à l'une quelconque des revendications 10 ou 11 , dans lequel la paroi (8) comprend un épaulement (27) périphérique à l'évidement (21) et dans lequel se loge l'excroissance (18).  12. The compressor according to any one of claims 8 to 9 combined with any one of claims 10 or 11, wherein the wall (8) comprises a shoulder (27) peripheral to the recess (21) and wherein houses the outgrowth (18).
13. Compresseur selon l'une quelconque des revendications précédentes, dans lequel le moyen d'isolation (14) comprend un moyen de retenue d'au moins un des éléments de connexion (13).  13. The compressor according to any one of the preceding claims, wherein the insulating means (14) comprises a means for retaining at least one of the connection elements (13).
PCT/EP2011/004799 2010-10-01 2011-09-26 Electrical connector for an electric compressor WO2012041472A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11764680.2A EP2622222B1 (en) 2010-10-01 2011-09-26 Electric terminal device for an electric compressor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1003891 2010-10-01
FR1003891A FR2965593B1 (en) 2010-10-01 2010-10-01 DEVICE FOR ELECTRICALLY CONNECTING AN ELECTRICAL COMPRESSOR

Publications (1)

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WO2012041472A1 true WO2012041472A1 (en) 2012-04-05

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PCT/EP2011/004799 WO2012041472A1 (en) 2010-10-01 2011-09-26 Electrical connector for an electric compressor

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EP (1) EP2622222B1 (en)
FR (1) FR2965593B1 (en)
WO (1) WO2012041472A1 (en)

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JP2014055545A (en) * 2012-09-12 2014-03-27 Toyota Industries Corp Motor compressor
EP3936722A1 (en) * 2020-07-06 2022-01-12 Schott AG Housing part, especially housing part in particular for an electronic housing, preferably e-compressor terminal

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JP2005054727A (en) * 2003-08-06 2005-03-03 Sanden Corp Electric connection structure of motor-driven compressor
WO2007005981A1 (en) * 2005-07-05 2007-01-11 Emerson Electric Co. Electric power terminal feed-through
EP2039932A1 (en) * 2006-07-11 2009-03-25 Sanden Corporation Sealed terminal device for electric compressor
WO2009157275A1 (en) 2008-06-23 2009-12-30 サンデン株式会社 Electric compressor
EP2218915A1 (en) * 2007-11-30 2010-08-18 Kabushiki Kaisha Kobe Seiko Sho Screw compressor

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Publication number Priority date Publication date Assignee Title
US20020155741A1 (en) * 2001-05-04 2002-10-24 Herrick Todd W. Dielectric terminal design
JP2005054727A (en) * 2003-08-06 2005-03-03 Sanden Corp Electric connection structure of motor-driven compressor
WO2007005981A1 (en) * 2005-07-05 2007-01-11 Emerson Electric Co. Electric power terminal feed-through
EP2039932A1 (en) * 2006-07-11 2009-03-25 Sanden Corporation Sealed terminal device for electric compressor
EP2218915A1 (en) * 2007-11-30 2010-08-18 Kabushiki Kaisha Kobe Seiko Sho Screw compressor
WO2009157275A1 (en) 2008-06-23 2009-12-30 サンデン株式会社 Electric compressor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014055545A (en) * 2012-09-12 2014-03-27 Toyota Industries Corp Motor compressor
EP3936722A1 (en) * 2020-07-06 2022-01-12 Schott AG Housing part, especially housing part in particular for an electronic housing, preferably e-compressor terminal
WO2022008344A1 (en) 2020-07-06 2022-01-13 Schott Ag Housing part, especially housing part in particular for an electronic housing, preferably e-compressor terminal

Also Published As

Publication number Publication date
EP2622222A1 (en) 2013-08-07
FR2965593B1 (en) 2017-12-22
FR2965593A1 (en) 2012-04-06
EP2622222B1 (en) 2016-09-07

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