EP2708747A1 - Housing for electric compressor - Google Patents

Housing for electric compressor Download PDF

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Publication number
EP2708747A1
EP2708747A1 EP13183408.7A EP13183408A EP2708747A1 EP 2708747 A1 EP2708747 A1 EP 2708747A1 EP 13183408 A EP13183408 A EP 13183408A EP 2708747 A1 EP2708747 A1 EP 2708747A1
Authority
EP
European Patent Office
Prior art keywords
housing
wall
electric motor
connection means
electrical connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13183408.7A
Other languages
German (de)
French (fr)
Other versions
EP2708747B1 (en
Inventor
Eric Blanc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Japan Co Ltd
Original Assignee
Valeo Japan Co Ltd
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 Japan Co Ltd filed Critical Valeo Japan Co Ltd
Publication of EP2708747A1 publication Critical patent/EP2708747A1/en
Application granted granted Critical
Publication of EP2708747B1 publication Critical patent/EP2708747B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • 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

Definitions

  • the invention relates to a housing of an electric compressor and an electric compressor comprising such a housing.
  • Such an electric compressor constitutes a refrigerant circuit fitted to a motor vehicle.
  • the refrigerant 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.
  • 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.
  • the invention aims to improve the situation.
  • the invention thus relates to a housing of an electric compressor, comprising an electric motor located in an internal volume of said housing, said housing being intended to receive a control device of the electric motor and comprising an electrical connection means for connecting the motor. electrical device to the control device through at least one opening arranged in a wall of said housing, characterized in that said housing comprises a part having a portion secured to the electric motor and electrically insulating said electrical connection means of the internal volume, said portion ensuring a seal at the right of the opening.
  • the portion thus provides a seal in an area near the opening.
  • the electrical connections are thus electrically isolated from the lubricant by means of of the portion of the room. It allows to isolate said opening of the internal volume so that the lubricant present in the internal volume can not leave it through the opening. Thanks to the invention, a single piece can electrically isolate all the electrical connections present in the internal volume of the housing and likely to be in contact with the refrigerant, and therefore the conventional lubricant.
  • the part is overmolded around the electrical connection means.
  • the part is overmolded around at least a portion of a stator of the electric motor. It is overmolded, for example, around a part of a stator winding.
  • the electric motor is powered by at least one phase, the stator comprising a plurality of coils and the part being overmolded around the same number of coils per phase.
  • the part comprises an electromagnetic compatibility filter.
  • This filter makes it possible to reduce the phenomena of EMC (electromagnetic disturbances) and thus increases the service life of the motor bearings.
  • said part comprises a base, connected to the portion and comprising orifices arranged to let a refrigerant.
  • the refrigerant comprises, for example, the conventional lubricant, especially PAG oil.
  • said wall and said part comprise a means for centering said workpiece relative to said wall.
  • This centering means thus facilitates the assembly of the part with the wall by proposing to pre-assemble and center the part and the wall.
  • the wall accommodates an end of a transmission shaft of a rotor of the electric motor.
  • the part accommodates an end of a transmission shaft of a motor rotor.
  • the engine can thus be tested after assembly of the part on the engine without having to wait for the mounting of the wall or the control device of the electric motor.
  • the verification of a subassembly consisting of the housing housing the electric motor and a compression mechanism can thus be operated before final assembly of the compressor. This limits the scrapping of the complete compressor.
  • the opening and at least a portion of the electrical connection means are located in the extension of an axis of rotation of the transmission shaft of the electric motor.
  • the part comprises a first part passing through the opening and a second part fixing said first part to the wall.
  • the first part comprises a stapling means inserted in the opening and snapped onto the wall.
  • the stapling means comprises, for example, at least two branches each provided with a tooth, adapted to engage the wall at the opening.
  • the second part comprises a tip plating the stapling means against the wall.
  • the tip is thus housed in the stapling means, in particular between the two branches.
  • the second part then makes it possible to secure the first part to the wall.
  • the first part comprises at least one sealing device ensuring the seal between the first part and the wall.
  • This sealing device contributes to the insulation between the opening and the internal volume.
  • the portion is the first part, the second part being distinct from the first part and reported in the latter.
  • the first part is then located in the internal volume of the engine.
  • the second part is, in this case outside the internal volume of the engine.
  • the portion is the second part, the first part being distinct from the second part and reported in the latter.
  • the second part is then located in the internal volume of the engine.
  • the first part is, in this case outside the internal volume of the engine.
  • the second part comprises at least one sealing device ensuring the seal between the second part and the wall.
  • the portion comprises a circular ring pressed against said wall.
  • the circular ring contributes, in particular, to the maintenance of the portion against the wall.
  • the sealing device extends, in particular, at the level of said circular ring.
  • the electrical connection means comprises an electrical terminal which passes through the wall and opens into an area where the control device is able to be connected. It is thus possible to test the motor when it is assembled with the wall in the housing before installing the control device.
  • the invention also relates to a compressor comprising a housing as described above and said control device of the electric motor.
  • a compressor also comprises a compression mechanism driven by the electric motor.
  • the engine control device comprises an electrical terminal, for example integral with the control device, inserted in said part and connected to said electrical connection means.
  • the invention relates to a housing 10 of an electric compressor, particularly a motor vehicle, constituting a refrigerant circuit.
  • a housing 10 comprises an electric motor 100 located in an internal volume of the housing 10.
  • the housing 10 receives at a first longitudinal end 40, located on the right of the figure 1 , a compression mechanism (not shown) of the electric compressor and at a second end longitudinal 41, opposite the first longitudinal end 40 relative to the electric motor 100 and located on the left of the figure 1 , a control device (not shown) of the electric motor 100.
  • the role of the electric motor 100 is to drive the compression mechanism of the electric compressor.
  • the housing 10 comprises a cylindrical envelope 30. It also comprises a wall 31 located at the second longitudinal end 41 and defining the internal volume of the housing 10 with the cylindrical envelope 30. This wall 31 is here intended to receive the device of control of the electric motor, outside the internal volume of the housing 10.
  • a fluid or mixture consisting of a refrigerant mixed with a lubricant enters the internal volume and circulates around and in the electric motor 100.
  • the fluid Refrigerant is a subcritical fluid such as for example R134a, but it can also be a supercritical refrigerant such as for example carbon dioxide known as R744.
  • the lubricant is for example a compound of the polyalkylene glycol (PAG) type.
  • the electric motor 100 comprises a stator 1 and a rotor 2.
  • the stator 1 has a cylindrical tube shape that extends longitudinally along a longitudinal axis A, called the axis of rotation A, located at the center of the stator 1.
  • the stator 1 presents thus a circular section in a plane perpendicular to the longitudinal axis A.
  • the rotor 2 is centered inside the stator 1 with respect to the axis of rotation A. It also has a cylindrical shape.
  • a magnetic field created by the stator 1 rotates the rotor 2 which then begins to rotate about the axis of rotation A.
  • the rotor 2 is fixed to a transmission shaft 11 in the form of a cylinder which follows the rotational movement of the rotor 2 about the axis of rotation A and which transmits this movement to the compression mechanism that comprises the electric compressor.
  • the electric motor 100 is located inside the electric compressor and in particular inside the housing 10 of the electric compressor.
  • the housing 10 is also centered relative to the axis of rotation A.
  • the housing 10 has two reinforcements 42 located on an outer periphery of the housing 10 and protruding from to this one. These two reinforcements 42 are each provided with a hole 43, adapted to receive a fixing element for fixing the housing 10 to the motor vehicle for which it is intended.
  • the stator 1 comprises a first longitudinal end 5, located on the right side of the figure 1 and a second longitudinal end 6, located on the left side of the figure 1 .
  • the stator 1 is thus disposed in the housing 10 so that the first longitudinal end 5 of the stator 1 is located on the side of the first longitudinal end 40 of the housing 10 and the second longitudinal end 6 of the stator 1 is located on the side of the second longitudinal end 41 of the housing 10.
  • the housing 10 comprises an electrical connection means 50 for connecting the electric motor 100 to the control device through at least one opening 32 arranged in the wall 31 of the housing 10.
  • the electric motor 100 comprises a plurality winding powered by three phases, each phase electrically feeding an identical number of windings.
  • the electrical connection means 50 is electrically connected to the winding 45 of the stator 1.
  • the electrical connection means 50 comprises for example at least one electrical wire 52 and a lug 53 per phase, that is to say here three lugs 53, each of the phases feeding a separate pod 53.
  • Each winding 45 is electrically connected to one of the lugs 53 by means of one of the electric wires 52.
  • several electric wires 52 are thus connected to each of the lugs 53. is intended to be connected to an electrical terminal 51 to allow the connection of the control device to the electric motor 100.
  • the housing 10 comprises a part 60 comprising a portion 61 integral with the electric motor 100 and electrically isolating the electrical connection means 50 internal volume.
  • the portion 61 also seals the right of the opening 32, that is to say, it isolates the internal volume of the outside of the housing 10 at the opening 32, so that the refrigerant can not leave the internal volume through the opening 32.
  • the portion 61 is pressed against an inner face 33 of the wall 31, that is to say a face facing the internal volume of the housing 10.
  • the portion comprises for this a circular ring 69 pressed against the wall 31 and in particular against the inner face 33 of the wall 31.
  • the piece 60 is, for example, molded around the connection means 50. It can also be overmolded around at least a portion of the stator 1 and in particular around a portion of the winding 45 of the stator located on the side of the second longitudinal end 6 of the stator 1, that is to say in front of the wall 31. In particular, the portion 61 is overmolded around the connection means 50 and the stator 1.
  • the housing 10 comprises the electrical terminal 51 which passes through the wall 31 through the opening 32 and opens into an area where the control device is able to be connected.
  • the electrical terminal 51 is inserted into the part 60 and electrically connected to the electrical connection means 50. It makes it possible to electrically connect the electric motor 100 to its control device via the connection means 50.
  • the wall 31 accommodates an end 43 of the transmission shaft 11 of the rotor 2 of the electric motor 100 for transmitting a rotational movement to the compression mechanism.
  • the wall comprises for this a housing 13 in which the transmission shaft 11 is secured in translation and free in rotation.
  • the part 60 comprises a first part 62 passing through the opening 32 and a second part 63 fixing the first part 62 to the wall 31.
  • the first part 62 here comprises a stapling means 65 inserted into the opening 32 and snapped onto Wall.
  • the stapling means 65 is inserted into the opening 32 from the internal volume towards the outside of the housing 10.
  • the stapling means 65 comprises, for example, two branches 66, 67 traversing from one side the opening 32 and each provided with a tooth 66 ', 67' clinging to one face of the wall 31, here the face opposite to the inner face 33 of the wall 31.
  • the second portion 63 comprises a tip 68 plating the stapling means 65 against the wall 31, at least inside the opening 32.
  • the tip 68 is inserted inside the stapling means 65, c that is to say here between the two branches 66, 67, so that it pushes the stapling means 65 against the wall 31 to secure it to the latter.
  • the first portion 62 comprises a sealing device 70 sealing between the first portion 62 and the wall 31.
  • This sealing device here comprises a first lip seal 71 disposed on the stapling means, so as to operate a seal against the inside of the opening 32 and an O-ring 72 disposed between the circular ring 69 of the portion 61 and the inner face of the wall 31.
  • the portion 61 is the first portion 62, the second portion 63 being distinct from the first portion 62 and reported therein. It is understood here that the first portion 62 is located inside the internal volume and is secured to the stator. The second part 63 is then inserted in the first part from outside the internal volume of the housing 10, that is to say the area in which the control device can extend.
  • the electrical terminal 51 is inserted in the workpiece 60, in particular in the portion 61 of the workpiece 60. It extends longitudinally through the opening 32 to allow electrical connection of the control device of the electric motor.
  • the terminal 51 extends in the center of the stapling means 65 and through the end piece 68 of the second part 63.
  • a seal 73 may be arranged around the terminal 51 to further ensure the isolation of the electrical connection means. 50.
  • the wall 31 and the part 60 comprise a centering means 80 of the part 60 relative to the wall 31.
  • This centering means 80 comprises, for example, a lug 81 located on the wall 31 and inserted into a rib 82 located on the part 60 as on the figure 3 or conversely, that is to say the lug 81 located on the part 60 and the rib 82 located on the wall 31 as on the figure 4 .
  • connection means 50 comprises three lugs 53 connected to an identical number of windings of the electric motor via the electric wires as explained above.
  • the part 60 is overmolded around the same winding number per phase.
  • the portion 61 is overmolded around eighteen coils, that is to say six coils per phase.
  • the portion 61 is then in the form of a continuous ring so that it is overmolded over the entire second end of the stator, that is to say on all the coil present on this side of the stator.
  • the portion 61 is overmolded around nine coils, that is to say three coils per phase.
  • the portion 61 is then discontinuous so that it is overmolded on several distinct parts of the second end of the stator.
  • connection means 50 are connected to the windings of the electric motor in a restricted area of the stator, that is to say that they are not distributed over the entire periphery of the stator. This thus leaves more freedom on the positioning of the part 60 on the stator, for example by choosing to position it only in the area where the connection means 50 are located, for example on an angular sector equal to 60 °, or only on some of the stator windings as shown in the figure 6 , the other windings being devoid of overmoulding of the part 60.
  • the part 60 comprises a base 90 connected to the portion 61.
  • the base 90 is located in the center of the portion 61 so that they together form a disc.
  • the base 90 includes orifices 91 arranged to let the refrigerant fluid comprising lubricant.
  • the part 60 accommodates, for example, the end 43 of the transmission shaft 11. It is in particular the base 90 which receives the end 43 of the transmission shaft 11. It comprises for this a housing 12 in which the transmission shaft 11 is secured in translation and free in rotation.
  • the opening 32 and a part of the connection means 50 are in the extension of the axis of rotation A of the transmission shaft 11 of the electric motor 100.
  • This part of the connection means 50 is thus located in the base 90 of the piece 60.
  • the electrical terminal 51 connected to this central lug 53 can also be located in the extension of the axis of rotation A of the transmission shaft.
  • the other lugs 53 of the electrical connection means 50 may be located close to the alignment with the axis of rotation A, for example, in the base 90 of the part 60. They are, in particular, located on either side of the central lug 53, as shown in figure 9 .
  • the portion 61 is the second portion 63, the first portion 62 being distinct from the second portion 63 and reported therein. It is understood here that the second portion 63 is located inside the internal volume and is secured to the stator. The first portion 62 is then located outside the internal volume of the housing.
  • This exemplary embodiment can of course be integrated into the housing 10 of the invention as explained in the description of the figures 1 , 7 and 8 .
  • the stapling means 65 of the first part is inserted in the other direction than that described above, that is to say from the outside of the housing 10 to the internal volume.
  • the wall 31 here comprises a bore 95, located on the inner face 33 of the wall 31 and accommodating a portion of the stapling means 65, for example the teeth 66 ', 67'.
  • the second portion 63 comprises at least one sealing device 75 sealing between the second portion 63 and the wall 31.
  • the sealing device 75 here comprises an O-ring 76 disposed between the circular ring 69 and the inner face of the wall 31.
  • the part 60 may comprise an electromagnetic compatibility filter 96.
  • the part 60 and in particular the portion 61 is, for example, overmolded around the electromagnetic compatibility filter 96.
  • the latter forms a ring which surrounds the lug 53.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The case (10) has an electric motor (100) located in an internal volume of the case, where the case is intended to receive an electric motor control device. An electric connection unit (50) is intended to connect the motor to the control device through an opening (32) that is formed in a wall (31) of the case. A part (60) comprising a portion (61) is attached with the motor for electrically isolating the electric connection unit of the internal volume. The portion ensures direct sealing of the opening. The part is molded around the connection unit.

Description

L'invention concerne un boîtier d'un compresseur électrique et un compresseur électrique comprenant un tel boîtier. Un tel compresseur électrique est constitutif d'un circuit de fluide frigorigène équipant un véhicule automobile.The invention relates to a housing of an electric compressor and an electric compressor comprising such a housing. Such an electric compressor constitutes a refrigerant circuit fitted to a motor vehicle.

Le fluide frigorigène 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 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 an 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 frigorigène.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 compressor mechanical, the latter losing its dielectric power when 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.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. .

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.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.

Afin d'utiliser uniquement le lubrifiant classique utilisé pour un compresseur mécanique, il a été proposé de l'isoler de toutes les connexions électriques pouvant exister dans le compresseur électrique. Il est connu pour cela de disposer un matériau isolant au niveau de chacune des connexions électriques susceptibles d'être en contact avec le lubrifiant classique. La gestion de la protection individuelle de chacune de ces connexions sensibles alourdit cependant le procédé de fabrication du compresseur et le rend plus coûteux.In order to use only the conventional lubricant used for a mechanical compressor, it has been proposed to isolate it from all electrical connections that may exist in the electric compressor. It is known for this to have an insulating material at each of the electrical connections may be in contact with the conventional lubricant. The management of the individual protection of each of these sensitive connections, however, increases the manufacturing process of the compressor and makes it more expensive.

L'invention vise à améliorer la situation.The invention aims to improve the situation.

L'invention concerne ainsi un boîtier d'un compresseur électrique, comprenant un moteur électrique situé dans un volume interne dudit boîtier, ledit boîtier étant destiné à recevoir un dispositif de commande du moteur électrique et comprenant un moyen de connexion électrique destiné à connecter le moteur électrique au dispositif de commande à travers au moins une ouverture agencée dans une paroi dudit boîtier, caractérisé par le fait que ledit boîtier comprend une pièce comportant une portion solidarisée au moteur électrique et isolant électriquement ledit moyen de connexion électrique du volume interne, ladite portion assurant une étanchéité au droit de l'ouverture.The invention thus relates to a housing of an electric compressor, comprising an electric motor located in an internal volume of said housing, said housing being intended to receive a control device of the electric motor and comprising an electrical connection means for connecting the motor. electrical device to the control device through at least one opening arranged in a wall of said housing, characterized in that said housing comprises a part having a portion secured to the electric motor and electrically insulating said electrical connection means of the internal volume, said portion ensuring a seal at the right of the opening.

La portion assure ainsi une étanchéité dans une zone proche de l'ouverture. Les connexions électriques sont ainsi isolées électriquement du lubrifiant au moyen de la portion de la pièce. Elle permet d'isoler ladite ouverture du volume interne de sorte que le lubrifiant présent dans le volume interne ne peut pas sortir de celui-ci par l'intermédiaire de l'ouverture. Grâce à l'invention, une seule pièce peut isoler électriquement l'ensemble des connexions électriques présentes dans le volume interne du boîtier et susceptibles d'être en contact avec le fluide frigorigène, et donc le lubrifiant classique.The portion thus provides a seal in an area near the opening. The electrical connections are thus electrically isolated from the lubricant by means of of the portion of the room. It allows to isolate said opening of the internal volume so that the lubricant present in the internal volume can not leave it through the opening. Thanks to the invention, a single piece can electrically isolate all the electrical connections present in the internal volume of the housing and likely to be in contact with the refrigerant, and therefore the conventional lubricant.

Selon un aspect de l'invention, la pièce est surmoulée autour du moyen de connexion électrique. Avantageusement, la pièce est surmoulée autour d'au moins une partie d'un stator du moteur électrique. Elle est surmoulée, par exemple, autour d'une partie d'un bobinage du stator.According to one aspect of the invention, the part is overmolded around the electrical connection means. Advantageously, the part is overmolded around at least a portion of a stator of the electric motor. It is overmolded, for example, around a part of a stator winding.

Selon un aspect de l'invention, le moteur électrique est alimenté par au moins une phase, le stator comprenant une pluralité de bobinages et la pièce étant surmoulée autour d'un même nombre de bobinages par phase.According to one aspect of the invention, the electric motor is powered by at least one phase, the stator comprising a plurality of coils and the part being overmolded around the same number of coils per phase.

Selon un exemple de réalisation de l'invention, la pièce comprend un filtre de compatibilité électromagnétique. Ce filtre permet de diminuer les phénomènes d'EMC (perturbations électromagnétiques) et augmente de la sorte la durée de vie des roulements du moteur.According to an exemplary embodiment of the invention, the part comprises an electromagnetic compatibility filter. This filter makes it possible to reduce the phenomena of EMC (electromagnetic disturbances) and thus increases the service life of the motor bearings.

Selon un aspect de l'invention, ladite pièce comprend une base, liée à la portion et comprenant des orifices agencés pour laisser passer un fluide frigorigène. Le fluide frigorigène comprend, par exemple, le lubrifiant classique, notamment de l'huile PAG.According to one aspect of the invention, said part comprises a base, connected to the portion and comprising orifices arranged to let a refrigerant. The refrigerant comprises, for example, the conventional lubricant, especially PAG oil.

Selon un exemple de réalisation de l'invention, ladite paroi et ladite pièce comprennent un moyen de centrage de ladite pièce par rapport à ladite paroi. Ce moyen de centrage facilite ainsi l'assemblage de la pièce avec la paroi en proposant de pré-assembler et de centrer la pièce et la paroi.According to an exemplary embodiment of the invention, said wall and said part comprise a means for centering said workpiece relative to said wall. This centering means thus facilitates the assembly of the part with the wall by proposing to pre-assemble and center the part and the wall.

Avantageusement, la paroi accueille une extrémité d'un arbre de transmission d'un rotor du moteur électrique.Advantageously, the wall accommodates an end of a transmission shaft of a rotor of the electric motor.

Selon une variante de réalisation de l'invention, la pièce accueille une extrémité d'un arbre de transmission d'un rotor du moteur. Le moteur peut ainsi être testé après l'assemblage de la pièce sur le moteur sans devoir attendre le montage de la paroi, ni du dispositif de commande du moteur électrique. La vérification d'un sous-ensemble constitué du boîtier logeant le moteur électrique et un mécanisme de compression peut ainsi être opérée avant assemblage final du compresseur. On limite ainsi la mise au rebut du compresseur complet.According to an alternative embodiment of the invention, the part accommodates an end of a transmission shaft of a motor rotor. The engine can thus be tested after assembly of the part on the engine without having to wait for the mounting of the wall or the control device of the electric motor. The verification of a subassembly consisting of the housing housing the electric motor and a compression mechanism can thus be operated before final assembly of the compressor. This limits the scrapping of the complete compressor.

Avantageusement, l'ouverture et au moins une partie du moyen de connexion électrique se situent dans le prolongement d'un axe de rotation de l'arbre de transmission du moteur électrique.Advantageously, the opening and at least a portion of the electrical connection means are located in the extension of an axis of rotation of the transmission shaft of the electric motor.

Selon un aspect de l'invention, la pièce comprend une première partie traversant l'ouverture et une deuxième partie fixant ladite première partie à la paroi.According to one aspect of the invention, the part comprises a first part passing through the opening and a second part fixing said first part to the wall.

De manière avantageuse, la première partie comprend un moyen d'agrafage inséré dans l'ouverture et encliqueté sur la paroi. Le moyen d'agrafage comprend, par exemple, au moins deux branches munies chacune d'une dent, apte à venir a prise sur la paroi au niveau de l'ouverture.Advantageously, the first part comprises a stapling means inserted in the opening and snapped onto the wall. The stapling means comprises, for example, at least two branches each provided with a tooth, adapted to engage the wall at the opening.

Avantageusement, la deuxième partie comprend un embout plaquant le moyen d'agrafage contre la paroi. L'embout est ainsi logé dans le moyen d'agrafage, notamment entre les deux branches. La deuxième partie permet alors de solidariser la première partie à la paroi.Advantageously, the second part comprises a tip plating the stapling means against the wall. The tip is thus housed in the stapling means, in particular between the two branches. The second part then makes it possible to secure the first part to the wall.

Selon un exemple de réalisation, la première partie comprend au moins un dispositif d'étanchéité assurant l'étanchéité entre la première partie et la paroi. Ce dispositif d'étanchéité participe à l'isolation entre l'ouverture et le volume interne.According to an exemplary embodiment, the first part comprises at least one sealing device ensuring the seal between the first part and the wall. This sealing device contributes to the insulation between the opening and the internal volume.

Selon un aspect de l'invention, la portion est la première partie, la deuxième partie étant distincte de la première partie et rapportée dans cette dernière. La première partie est alors située dans le volume interne du moteur. La deuxième partie est, dans ce cas à l'extérieur du volume interne du moteur.According to one aspect of the invention, the portion is the first part, the second part being distinct from the first part and reported in the latter. The first part is then located in the internal volume of the engine. The second part is, in this case outside the internal volume of the engine.

Selon une variante de l'invention, la portion est la deuxième partie, la première partie étant distincte de la deuxième partie et rapportée dans cette dernière. La deuxième partie est alors située dans le volume interne du moteur. La première partie est, dans ce cas à l'extérieur du volume interne du moteur.According to a variant of the invention, the portion is the second part, the first part being distinct from the second part and reported in the latter. The second part is then located in the internal volume of the engine. The first part is, in this case outside the internal volume of the engine.

Selon un aspect de l'invention, la deuxième partie comprend au moins un dispositif d'étanchéité assurant l'étanchéité entre la deuxième partie et la paroi.According to one aspect of the invention, the second part comprises at least one sealing device ensuring the seal between the second part and the wall.

Avantageusement, la portion comprend une bague circulaire plaquée contre ladite paroi. La bague circulaire participe, notamment, au maintien de la portion contre la paroi. Le dispositif d'étanchéité s'étend, notamment, au niveau de ladite bague circulaire.Advantageously, the portion comprises a circular ring pressed against said wall. The circular ring contributes, in particular, to the maintenance of the portion against the wall. The sealing device extends, in particular, at the level of said circular ring.

Selon un exemple de réalisation, le moyen de connexion électrique comprend un terminal électrique qui traverse la paroi et débouche dans une zone où le dispositif de commande est apte à être connecté. Il est ainsi possible de tester le moteur lorsqu'il est assemblé avec la paroi dans le boîtier avant d'installer le dispositif de commande.According to an exemplary embodiment, the electrical connection means comprises an electrical terminal which passes through the wall and opens into an area where the control device is able to be connected. It is thus possible to test the motor when it is assembled with the wall in the housing before installing the control device.

L'invention concerne aussi un compresseur comprenant un boîtier tel que décrit précédemment et ledit dispositif de commande du moteur électrique. Un tel compresseur comprend également un mécanisme de compression entraîné par le moteur électrique.The invention also relates to a compressor comprising a housing as described above and said control device of the electric motor. Such a compressor also comprises a compression mechanism driven by the electric motor.

Selon un aspect de l'invention, le dispositif de commande du moteur comprend un terminal électrique, par exemple solidaire du dispositif de commande, inséré dans ladite pièce et connecté audit moyen de connexion électrique.According to one aspect of the invention, the engine control device comprises an electrical terminal, for example integral with the control device, inserted in said part and connected to said electrical connection means.

Les figures annexées feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables.

  • La figure 1 est une vue en coupe dans un plan longitudinal d'un boîtier de compresseur électrique conforme à l'invention.
  • La figure 2 est une vue en coupe d'une pièce du boîtier de l'invention illustré à la figure 1.
  • Les figures 3 et 4 sont des vues de cotés représentant des variantes de moyens de centrage de la pièce par rapport à une paroi du boîtier.
  • La figure 5 est une vue de face de la pièce du boîtier de l'invention illustré à la figure 1.
  • La figure 6 est une vue similaire à la figure 5 représentant une variante de réalisation de l'invention.
  • La figure 7 est une vue similaire à la figure 1 représentant une variante de réalisation de l'invention.
  • La figure 8 est une vue similaire à la figure 7 représentant une variante de réalisation de l'invention.
  • La figure 9 est une vue de face de la pièce du boîtier de l'invention illustré à la figure 8.
  • La figure 10 est une vue en coupe de la pièce et d'une partie de la paroi illustrées à la figure 2 représentant une variante de réalisation de l'invention.
  • La figure 11 est une vue en coupe représentant la portion de la pièce de la figure 10 munie d'un filtre de compatibilité électromagnétique.
The appended figures will make it clear how the invention can be realized. In these figures, identical references designate similar elements.
  • The figure 1 is a sectional view in a longitudinal plane of an electric compressor box according to the invention.
  • The figure 2 is a sectional view of a part of the housing of the invention illustrated in FIG. figure 1 .
  • The Figures 3 and 4 are side views showing alternative means for centering the workpiece relative to a wall of the housing.
  • The figure 5 is a front view of the part of the housing of the invention shown in FIG. figure 1 .
  • The figure 6 is a view similar to the figure 5 representing an alternative embodiment of the invention.
  • The figure 7 is a view similar to the figure 1 representing an alternative embodiment of the invention.
  • The figure 8 is a view similar to the figure 7 representing an alternative embodiment of the invention.
  • The figure 9 is a front view of the part of the housing of the invention shown in FIG. figure 8 .
  • The figure 10 is a sectional view of the part and a portion of the wall illustrated in FIG. figure 2 representing an alternative embodiment of the invention.
  • The figure 11 is a sectional view showing the portion of the room from the figure 10 equipped with an electromagnetic compatibility filter.

Comme représenté sur la figure 1, l'invention concerne un boîtier 10 d'un compresseur électrique, notamment de véhicule automobile, constitutif d'un circuit de fluide frigorigène. Un tel boîtier 10 comprend un moteur électrique 100 situé dans un volume interne du boîtier 10. Le boîtier 10 reçoit à une première extrémité longitudinale 40, située sur la droite de la figure 1, un mécanisme de compression (non représenté) du compresseur électrique et à une deuxième extrémité longitudinale 41, opposée à la première extrémité longitudinale 40 par rapport au moteur électrique 100 et située sur la gauche de la figure 1, un dispositif de commande (non représenté) du moteur électrique 100. Le rôle du moteur électrique 100 est d'entraîner le mécanisme de compression du compresseur électrique.As shown on the figure 1 the invention relates to a housing 10 of an electric compressor, particularly a motor vehicle, constituting a refrigerant circuit. Such a housing 10 comprises an electric motor 100 located in an internal volume of the housing 10. The housing 10 receives at a first longitudinal end 40, located on the right of the figure 1 , a compression mechanism (not shown) of the electric compressor and at a second end longitudinal 41, opposite the first longitudinal end 40 relative to the electric motor 100 and located on the left of the figure 1 , a control device (not shown) of the electric motor 100. The role of the electric motor 100 is to drive the compression mechanism of the electric compressor.

Le boîtier 10 comprend une enveloppe cylindrique 30. Il comprend également une paroi 31 située au niveau de la deuxième extrémité longitudinale 41 et définissant le volume interne du boîtier 10 avec l'enveloppe cylindrique 30. Cette paroi 31 est ici destinée à recevoir le dispositif de commande du moteur électrique, à l'extérieur du volume intérieur du boîtier 10. En fonctionnement, un fluide ou mélange constitué d'un fluide frigorigène mélangé à un lubrifiant entre dans le volume interne et circule autour et dans le moteur électrique 100. Le fluide frigorigène est une fluide sous critique tel que par exemple le R134a, mais il peut également s'agir d'un fluide frigorigène 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 (PAG).The housing 10 comprises a cylindrical envelope 30. It also comprises a wall 31 located at the second longitudinal end 41 and defining the internal volume of the housing 10 with the cylindrical envelope 30. This wall 31 is here intended to receive the device of control of the electric motor, outside the internal volume of the housing 10. In operation, a fluid or mixture consisting of a refrigerant mixed with a lubricant enters the internal volume and circulates around and in the electric motor 100. The fluid Refrigerant is a subcritical fluid such as for example R134a, but it can also be a supercritical refrigerant such as for example carbon dioxide known as R744. The lubricant is for example a compound of the polyalkylene glycol (PAG) type.

Le moteur électrique 100 comprend un stator 1 et un rotor 2. Le stator 1 présente une forme de tube cylindrique qui s'étend longitudinalement selon un axe longitudinal A, dit axe de rotation A, situé au centre du stator 1. Le stator 1 présente ainsi une section circulaire dans un plan perpendiculaire à l'axe longitudinal A.The electric motor 100 comprises a stator 1 and a rotor 2. The stator 1 has a cylindrical tube shape that extends longitudinally along a longitudinal axis A, called the axis of rotation A, located at the center of the stator 1. The stator 1 presents thus a circular section in a plane perpendicular to the longitudinal axis A.

Le rotor 2 est centré à l'intérieur du stator 1 par rapport à l'axe de rotation A. Il présente également une forme cylindrique. Lorsque le moteur électrique 100 fonctionne, un champ magnétique créé par le stator 1 entraîne en rotation le rotor 2 qui se met alors à tourner autour de l'axe de rotation A. Le rotor 2 est fixé à un arbre de transmission 11 en forme de cylindre qui suit le mouvement de rotation du rotor 2 autour de l'axe de rotation A et qui transmet ce mouvement au mécanisme de compression que comprend le compresseur électrique.The rotor 2 is centered inside the stator 1 with respect to the axis of rotation A. It also has a cylindrical shape. When the electric motor 100 is operating, a magnetic field created by the stator 1 rotates the rotor 2 which then begins to rotate about the axis of rotation A. The rotor 2 is fixed to a transmission shaft 11 in the form of a cylinder which follows the rotational movement of the rotor 2 about the axis of rotation A and which transmits this movement to the compression mechanism that comprises the electric compressor.

Le moteur électrique 100 se situe à l'intérieur du compresseur électrique et en particulier à l'intérieur du boîtier 10 du compresseur électrique. Le boîtier 10 est également centré par rapport à l'axe de rotation A. Le boîtier 10 possède deux renforts 42 situés sur une périphérie externe du boîtier 10 et faisant saillie par rapport à celui-ci. Ces deux renforts 42 sont munis chacun d'un trou 43, apte à recevoir un élément de fixation permettant de fixer le boîtier 10 au véhicule automobile auquel il est destiné.The electric motor 100 is located inside the electric compressor and in particular inside the housing 10 of the electric compressor. The housing 10 is also centered relative to the axis of rotation A. The housing 10 has two reinforcements 42 located on an outer periphery of the housing 10 and protruding from to this one. These two reinforcements 42 are each provided with a hole 43, adapted to receive a fixing element for fixing the housing 10 to the motor vehicle for which it is intended.

Le stator 1 comprend une première extrémité longitudinale 5, située du coté droit de la figure 1 et une deuxième extrémité longitudinale 6, située du coté gauche de la figure 1. Le stator 1 est ainsi disposé dans le boîtier 10 de sorte que la première extrémité longitudinale 5 du stator 1 est située du coté de la première extrémité longitudinale 40 du boîtier 10 et la deuxième extrémité longitudinale 6 du stator 1 est située du coté de la deuxième extrémité longitudinale 41 du boîtier 10.The stator 1 comprises a first longitudinal end 5, located on the right side of the figure 1 and a second longitudinal end 6, located on the left side of the figure 1 . The stator 1 is thus disposed in the housing 10 so that the first longitudinal end 5 of the stator 1 is located on the side of the first longitudinal end 40 of the housing 10 and the second longitudinal end 6 of the stator 1 is located on the side of the second longitudinal end 41 of the housing 10.

On remarque également sur la figure 1, la présence d'un ensemble de bobinages 45, présentes à l'intérieur du stator 1 et qui se prolongent à l'extérieur de celui-ci, de part et d'autre des extrémités longitudinales 5, 6 du stator 1.We also notice on the figure 1 , the presence of a set of windings 45, present inside the stator 1 and which extend outside thereof, on either side of the longitudinal ends 5, 6 of the stator 1.

Le boîtier 10 comprend un moyen de connexion électrique 50 destiné à connecter le moteur électrique 100 au dispositif de commande à travers au moins une ouverture 32 agencée dans la paroi 31 du boîtier 10. Dans cet exemple de réalisation, le moteur électrique 100 comprend une pluralité de bobinage alimentée par trois phases, chaque phase alimentant électriquement un nombre identique de bobinage.The housing 10 comprises an electrical connection means 50 for connecting the electric motor 100 to the control device through at least one opening 32 arranged in the wall 31 of the housing 10. In this embodiment, the electric motor 100 comprises a plurality winding powered by three phases, each phase electrically feeding an identical number of windings.

Le moyen de connexion électrique 50 est relié électriquement au bobinage 45 du stator 1. Le moyen de connexion électrique 50 comprend par exemple au moins un fil électrique 52 et une cosse 53 par phase, c'est-à-dire ici trois cosses 53, chacune des phases alimentant une cosse 53 distincte. Chaque bobinage 45 est connecté électriquement à une des cosses 53 par l'intermédiaire d'un des fils électriques 52. Dans le cas où chaque phase alimente plusieurs bobinages distincts, plusieurs fils électriques 52 sont donc reliés à chacune des cosses 53. Chaque cosse 53 est destinée à être connectée à un terminal électrique 51 afin de permettre la connexion du dispositif de commande au moteur électrique 100.The electrical connection means 50 is electrically connected to the winding 45 of the stator 1. The electrical connection means 50 comprises for example at least one electrical wire 52 and a lug 53 per phase, that is to say here three lugs 53, each of the phases feeding a separate pod 53. Each winding 45 is electrically connected to one of the lugs 53 by means of one of the electric wires 52. In the case where each phase feeds several distinct windings, several electric wires 52 are thus connected to each of the lugs 53. is intended to be connected to an electrical terminal 51 to allow the connection of the control device to the electric motor 100.

Le boîtier 10 comprend une pièce 60 comportant une portion 61 solidarisée au moteur électrique 100 et isolant électriquement le moyen de connexion électrique 50 du volume interne. La portion 61 assure également une étanchéité au droit de l'ouverture 32, c'est-à-dire qu'elle isole le volume interne de l'extérieur du boîtier 10 au niveau de l'ouverture 32, de sorte que le fluide frigorigène ne peut pas sortir du volume interne par l'ouverture 32. La portion 61 est plaquée contre une face interne 33 de la paroi 31, c'est-à-dire une face dirigée vers le volume interne du boîtier 10. La portion comprend pour cela une bague circulaire 69 plaquée contre la paroi 31 et notamment contre la face interne 33 de la paroi 31.The housing 10 comprises a part 60 comprising a portion 61 integral with the electric motor 100 and electrically isolating the electrical connection means 50 internal volume. The portion 61 also seals the right of the opening 32, that is to say, it isolates the internal volume of the outside of the housing 10 at the opening 32, so that the refrigerant can not leave the internal volume through the opening 32. The portion 61 is pressed against an inner face 33 of the wall 31, that is to say a face facing the internal volume of the housing 10. The portion comprises for this a circular ring 69 pressed against the wall 31 and in particular against the inner face 33 of the wall 31.

La pièce 60 est, par exemple, surmoulée autour du moyen de connexion 50. Elle peut également être surmoulée autour d'au moins une partie du stator 1 et en particulier autour d'une partie du bobinage 45 du stator située du coté de la deuxième extrémité longitudinale 6 du stator 1, c'est-à-dire en face de la paroi 31. C'est en particulier la portion 61 qui est surmoulé autour du moyen de connexion 50 et du stator 1.The piece 60 is, for example, molded around the connection means 50. It can also be overmolded around at least a portion of the stator 1 and in particular around a portion of the winding 45 of the stator located on the side of the second longitudinal end 6 of the stator 1, that is to say in front of the wall 31. In particular, the portion 61 is overmolded around the connection means 50 and the stator 1.

Le boîtier 10 comprend le terminal électrique 51 qui traverse la paroi 31 par l'ouverture 32 et débouche dans une zone où le dispositif de commande est apte à être connecté. Le terminal électrique 51 est inséré dans la pièce 60 et connecté électriquement au moyen de connexion électrique 50. Il permet de relier électriquement le moteur électrique 100 à son dispositif de commande par l'intermédiaire du moyen de connexion 50.The housing 10 comprises the electrical terminal 51 which passes through the wall 31 through the opening 32 and opens into an area where the control device is able to be connected. The electrical terminal 51 is inserted into the part 60 and electrically connected to the electrical connection means 50. It makes it possible to electrically connect the electric motor 100 to its control device via the connection means 50.

La paroi 31 accueille une extrémité 43 de l'arbre de transmission 11 du rotor 2 du moteur électrique 100 destiné à transmettre un mouvement de rotation au mécanisme de compression. La paroi comprend pour cela un logement 13 dans lequel l'arbre de transmission 11 est solidarisé en translation et libre en rotation.The wall 31 accommodates an end 43 of the transmission shaft 11 of the rotor 2 of the electric motor 100 for transmitting a rotational movement to the compression mechanism. The wall comprises for this a housing 13 in which the transmission shaft 11 is secured in translation and free in rotation.

Comme illustré sur la figure 1 et de manière plus détaillé sur la figure 2, la pièce 60 comprend une première partie 62 traversant l'ouverture 32 et une deuxième partie 63 fixant la première partie 62 à la paroi 31. La première partie 62 comprend ici un moyen d'agrafage 65 inséré dans l'ouverture 32 et encliqueté sur la paroi. Le moyen d'agrafage 65 est inséré dans l'ouverture 32 depuis le volume interne vers l'extérieur du boîtier 10. Selon la variante illustrée à la figure 2, le moyen d'agrafage 65 comprend, par exemple, deux branches 66, 67 traversant de part en part l'ouverture 32 et munies chacune d'une dent 66', 67' s'accrochant sur une face de la paroi 31, ici la face opposée à la face interne 33 de la paroi 31.As illustrated on the figure 1 and in more detail on the figure 2 the part 60 comprises a first part 62 passing through the opening 32 and a second part 63 fixing the first part 62 to the wall 31. The first part 62 here comprises a stapling means 65 inserted into the opening 32 and snapped onto Wall. The stapling means 65 is inserted into the opening 32 from the internal volume towards the outside of the housing 10. According to the variant illustrated in FIG. figure 2 , the stapling means 65 comprises, for example, two branches 66, 67 traversing from one side the opening 32 and each provided with a tooth 66 ', 67' clinging to one face of the wall 31, here the face opposite to the inner face 33 of the wall 31.

La deuxième partie 63 comprend un embout 68 plaquant le moyen d'agrafage 65 contre la paroi 31, au moins à l'intérieur de l'ouverture 32. L'embout 68 est inséré à l'intérieur du moyen d'agrafage 65, c'est-à-dire ici entre les deux branches 66, 67, de sorte qu'il pousse le moyen d'agrafage 65 contre la paroi 31 afin de le solidariser à cette dernière.The second portion 63 comprises a tip 68 plating the stapling means 65 against the wall 31, at least inside the opening 32. The tip 68 is inserted inside the stapling means 65, c that is to say here between the two branches 66, 67, so that it pushes the stapling means 65 against the wall 31 to secure it to the latter.

La première partie 62 comprend un dispositif d'étanchéité 70 assurant l'étanchéité entre la première partie 62 et la paroi 31. Ce dispositif d'étanchéité comprend ici un premier joint à lèvres 71 disposé sur le moyen d'agrafage, de sorte à opérer une étanchéité contre l'intérieur de l'ouverture 32 et un joint torique 72 disposé entre la bague circulaire 69 de la portion 61 et la face interne de la paroi 31.The first portion 62 comprises a sealing device 70 sealing between the first portion 62 and the wall 31. This sealing device here comprises a first lip seal 71 disposed on the stapling means, so as to operate a seal against the inside of the opening 32 and an O-ring 72 disposed between the circular ring 69 of the portion 61 and the inner face of the wall 31.

Selon l'exemple de réalisation de l'invention illustré à la figure 1 et 2, la portion 61 est la première partie 62, la deuxième partie 63 étant distinct de la première partie 62 et rapportée dans cette dernière. On comprend ici que la première partie 62 est située à l'intérieur du volume interne et qu'elle est solidarisée au stator. La deuxième partie 63 est alors insérée dans la première partie à partir de l'extérieur du volume interne du boîtier 10, c'est-à-dire la zone dans laquelle peut s'étendre le dispositif de commande.According to the exemplary embodiment of the invention illustrated in figure 1 and 2 the portion 61 is the first portion 62, the second portion 63 being distinct from the first portion 62 and reported therein. It is understood here that the first portion 62 is located inside the internal volume and is secured to the stator. The second part 63 is then inserted in the first part from outside the internal volume of the housing 10, that is to say the area in which the control device can extend.

Le terminal électrique 51 est inséré dans la pièce 60, en particulier dans la portion 61 de la pièce 60. Il s'étend longitudinalement à travers l'ouverture 32 afin de permettre le branchement électrique du dispositif de commande du moteur électrique. Le terminal 51 s'étend au centre du moyen d'agrafage 65 et à travers l'embout 68 de la deuxième partie 63. Un joint 73 peut être disposé autour du terminal 51 afin d'assurer davantage l'isolement du moyen de connexion électrique 50.The electrical terminal 51 is inserted in the workpiece 60, in particular in the portion 61 of the workpiece 60. It extends longitudinally through the opening 32 to allow electrical connection of the control device of the electric motor. The terminal 51 extends in the center of the stapling means 65 and through the end piece 68 of the second part 63. A seal 73 may be arranged around the terminal 51 to further ensure the isolation of the electrical connection means. 50.

Comme illustré aux figures 3 et 4, la paroi 31 et la pièce 60, notamment au niveau de la portion 61, comprennent un moyen de centrage 80 de la pièce 60 par rapport à la paroi 31. Ce moyen de centrage 80 comprend, par exemple, un ergot 81 situé sur la paroi 31 et inséré dans un nervure 82 située sur la pièce 60 comme sur la figure 3 ou inversement, c'est-à-dire l'ergot 81 situé sur la pièce 60 et la nervure 82 située sur la paroi 31 comme sur la figure 4.As illustrated in Figures 3 and 4 , the wall 31 and the part 60, especially at the portion 61, comprise a centering means 80 of the part 60 relative to the wall 31. This centering means 80 comprises, for example, a lug 81 located on the wall 31 and inserted into a rib 82 located on the part 60 as on the figure 3 or conversely, that is to say the lug 81 located on the part 60 and the rib 82 located on the wall 31 as on the figure 4 .

Comme illustré sur les figures 5 et 6, le moyen de connexion 50 comprend trois cosses 53 connectées à un nombre identique de bobinage du moteur électrique par l'intermédiaire des fils électriques comme expliqués précédemment. La pièce 60 est surmoulée autour d'un même nombre de bobinage par phase. Ainsi, selon un exemple de réalisation illustré à la figure 5, la portion 61 est surmoulée autour de dix-huit bobinages, c'est-à-dire six bobinages par phase. La portion 61 est alors en forme d'anneau continue de sorte qu'elle est surmoulée sur toute la deuxième extrémité du stator, c'est-à-dire sur tout le bobinage présent de ce coté du stator.As illustrated on Figures 5 and 6 , the connection means 50 comprises three lugs 53 connected to an identical number of windings of the electric motor via the electric wires as explained above. The part 60 is overmolded around the same winding number per phase. Thus, according to an exemplary embodiment illustrated in figure 5 the portion 61 is overmolded around eighteen coils, that is to say six coils per phase. The portion 61 is then in the form of a continuous ring so that it is overmolded over the entire second end of the stator, that is to say on all the coil present on this side of the stator.

Selon un autre exemple de réalisation illustré à la figure 6, la portion 61 est surmoulée autour de neuf bobinages, c'est-à-dire trois bobinages par phase. La portion 61 est alors discontinue de sorte qu'elle est surmoulée sur plusieurs parties distinctes de la deuxième extrémité du stator.According to another exemplary embodiment illustrated in figure 6 the portion 61 is overmolded around nine coils, that is to say three coils per phase. The portion 61 is then discontinuous so that it is overmolded on several distinct parts of the second end of the stator.

On remarque sur ces deux modes de réalisations illustrés aux figures 5 et 6 que les cosses 53 du moyen de connexion 50 sont connectées aux bobinages du moteur électrique dans une zone restreinte du stator, c'est-à-dire qu'elles ne sont pas réparties sur toute la périphérie du stator. Cela laisse ainsi plus de liberté sur le positionnement de la pièce 60 sur le stator, en choisissant par exemple de la positionner uniquement dans la zone où se situent le moyen de connexion 50, par exemple sur un secteur angulaire égal à 60°, ou seulement sur certains des bobinages du stator comme illustré à la figure 6, les autres bobinages étant dépourvus du surmoulage de la pièce 60.We note on these two embodiments illustrated at Figures 5 and 6 that the lugs 53 of the connection means 50 are connected to the windings of the electric motor in a restricted area of the stator, that is to say that they are not distributed over the entire periphery of the stator. This thus leaves more freedom on the positioning of the part 60 on the stator, for example by choosing to position it only in the area where the connection means 50 are located, for example on an angular sector equal to 60 °, or only on some of the stator windings as shown in the figure 6 , the other windings being devoid of overmoulding of the part 60.

Dans l'exemple de réalisation de l'invention illustré sur les figures 7 à 9 la pièce 60 comprend une base 90 liée à la portion 61. La base 90 est située au centre de la portion 61 de sorte qu'elles forment ensemble un disque. La base 90 comprend des orifices 91 agencés pour laisser passer le fluide frigorigène comprenant lubrifiant.In the exemplary embodiment of the invention illustrated in the Figures 7 to 9 the part 60 comprises a base 90 connected to the portion 61. The base 90 is located in the center of the portion 61 so that they together form a disc. The base 90 includes orifices 91 arranged to let the refrigerant fluid comprising lubricant.

Dans cet exemple de réalisation, la pièce 60 accueille, par exemple, l'extrémité 43 de l'arbre de transmission 11. C'est en particulier la base 90 qui accueille l'extrémité 43 de l'arbre de transmission 11. Elle comprend pour cela un logement 12 dans lequel l'arbre de transmission 11 est solidarisé en translation et libre en rotation.In this embodiment, the part 60 accommodates, for example, the end 43 of the transmission shaft 11. It is in particular the base 90 which receives the end 43 of the transmission shaft 11. It comprises for this a housing 12 in which the transmission shaft 11 is secured in translation and free in rotation.

Selon l'exemple de réalisation illustré à la figure 8 et 9, l'ouverture 32 et une partie du moyen de connexion 50 se situent dans le prolongement de l'axe de rotation A de l'arbre de transmission 11 du moteur électrique 100. Cette partie du moyen de connexion 50 est ainsi située dans la base 90 de la pièce 60. C'est en particulier une cosse 53 centrale du moyen de connexion 50 qui est alignée avec l'axe de rotation A de l'arbre de transmission 11. Le terminal électrique 51 connecté à cette cosse 53 centrale peut ainsi être également située dans le prolongement de l'axe de rotation A de l'arbre de transmission. Les autres cosses 53 du moyens de connexion électrique 50 peuvent être situées proche de l'alignement avec l'axe de rotation A, par exemple, dans la base 90 de la pièce 60. Elles sont, notamment, situées de part et d'autre de la cosse 53 centrale, comme illustré à la figure 9.According to the exemplary embodiment illustrated in figure 8 and 9 , the opening 32 and a part of the connection means 50 are in the extension of the axis of rotation A of the transmission shaft 11 of the electric motor 100. This part of the connection means 50 is thus located in the base 90 of the piece 60. It is in particular a central lug 53 of the connection means 50 which is aligned with the axis of rotation A of the transmission shaft 11. The electrical terminal 51 connected to this central lug 53 can also be located in the extension of the axis of rotation A of the transmission shaft. The other lugs 53 of the electrical connection means 50 may be located close to the alignment with the axis of rotation A, for example, in the base 90 of the part 60. They are, in particular, located on either side of the central lug 53, as shown in figure 9 .

Selon l'exemple de réalisation illustré à la figure 10, la portion 61 est la deuxième partie 63, la première partie 62 étant distinct de la deuxième partie 63 et rapportée dans cette dernière. On comprend ici que la deuxième partie 63 est située à l'intérieur du volume interne et qu'elle est solidarisée au stator. La première partie 62 est alors située à l'extérieur du volume interne du boîtier. Cet exemple de réalisation peut bien sur s'intégrer dans le boîtier 10 de l'invention comme expliqué dans la description des figures 1, 7 et 8.According to the exemplary embodiment illustrated in figure 10 , the portion 61 is the second portion 63, the first portion 62 being distinct from the second portion 63 and reported therein. It is understood here that the second portion 63 is located inside the internal volume and is secured to the stator. The first portion 62 is then located outside the internal volume of the housing. This exemplary embodiment can of course be integrated into the housing 10 of the invention as explained in the description of the figures 1 , 7 and 8 .

Dans ce cas, le moyen d'agrafage 65 de la première partie est inséré dans l'autre sens que celui décrit précédemment, c'est-à-dire de l'extérieur du boîtier 10 vers le volume interne. La paroi 31 comprend ici un alésage 95, situé sur la face interne 33 de la paroi 31 et accueillant une partie du moyen d'agrafage 65, par exemple les dents 66', 67'.In this case, the stapling means 65 of the first part is inserted in the other direction than that described above, that is to say from the outside of the housing 10 to the internal volume. The wall 31 here comprises a bore 95, located on the inner face 33 of the wall 31 and accommodating a portion of the stapling means 65, for example the teeth 66 ', 67'.

Dans cet exemple de réalisation de l'invention, la deuxième partie 63 comprend au moins un dispositif d'étanchéité 75 assurant l'étanchéité entre la deuxième partie 63 et la paroi 31. Le dispositif d'étanchéité 75 comprend ici un joint torique 76 disposé entre la bague circulaire 69 et la face interne de la paroi 31.In this embodiment of the invention, the second portion 63 comprises at least one sealing device 75 sealing between the second portion 63 and the wall 31. The sealing device 75 here comprises an O-ring 76 disposed between the circular ring 69 and the inner face of the wall 31.

Comme illustré sur la figure 11, la pièce 60 peut comprendre un filtre de compatibilité électromagnétique 96. La pièce 60 et en particulier la portion 61, est, par exemple, surmoulée autour du filtre de compatibilité électromagnétique 96. Ce dernier forme un anneau qui entoure la cosse 53.As illustrated on the figure 11 the part 60 may comprise an electromagnetic compatibility filter 96. The part 60 and in particular the portion 61 is, for example, overmolded around the electromagnetic compatibility filter 96. The latter forms a ring which surrounds the lug 53.

Toutes les caractéristiques de l'invention relatives à la portion 61 et à la paroi 31 peuvent s'appliquer dans le cas où la portion 61 est la première partie 62 et dans le cas où la portion 61 est la deuxième partie 63. En outre, dans la description des figures 7 et 8 relative au boîtier 10, seules les différences avec le mode de réalisation du boîtier 10 illustré à la figure 1 ont été décrits, les points communs entre tous ces modes n'étant mentionnés qu'au moment d'évoquer la figure 1.All the features of the invention relating to the portion 61 and the wall 31 may be applied in the case where the portion 61 is the first portion 62 and in the case where the portion 61 is the second portion 63. In addition, in the description of figures 7 and 8 relative to the housing 10, only the differences with the embodiment of the housing 10 illustrated in FIG. figure 1 have been described, the commonalities between all these modes being mentioned only when mentioning the figure 1 .

Claims (21)

Boîtier (10) d'un compresseur électrique, comprenant un moteur électrique (100) situé dans un volume interne dudit boîtier (10), ledit boîtier (10) étant destiné à recevoir un dispositif de commande du moteur électrique (100) et comprenant un moyen de connexion électrique (50) destiné à connecter le moteur électrique (100) au dispositif de commande à travers au moins une ouverture (32) agencée dans une paroi (31) dudit boîtier (10), caractérisé par le fait que ledit boîtier (10) comprend une pièce (60) comportant une portion (61) solidarisée au moteur électrique (100) et isolant électriquement ledit moyen de connexion électrique (50) du volume interne, ladite portion (60) assurant une étanchéité au droit de l'ouverture (32).Housing (10) of an electric compressor, comprising an electric motor (100) located in an internal volume of said housing (10), said housing (10) being adapted to receive a control device of the electric motor (100) and comprising a electrical connection means (50) for connecting the electric motor (100) to the control device through at least one opening (32) arranged in a wall (31) of said housing (10), characterized in that said housing ( 10) comprises a part (60) comprising a portion (61) secured to the electric motor (100) and electrically insulating said electrical connection means (50) of the internal volume, said portion (60) ensuring a seal at the opening (32). Boîtier (10) selon la revendication 1, dans lequel la pièce (60) est surmoulée autour du moyen de connexion électrique (50).The housing (10) of claim 1, wherein the part (60) is overmolded around the electrical connection means (50). Boîtier (10) selon les revendications 1 ou 2, dans lequel la pièce (60) est surmoulée autour d'au moins une partie d'un stator (1) du moteur électrique (100).Housing (10) according to claims 1 or 2, wherein the piece (60) is overmolded around at least a portion of a stator (1) of the electric motor (100). Boîtier (10) selon la revendication 3, dans lequel le moteur électrique (100) est alimenté par au moins une phase, le stator (1) comprenant une pluralité de bobinages (45) et la pièce (60) étant surmoulée autour d'un même nombre de bobinages (45) par phase.Housing (10) according to claim 3, wherein the electric motor (100) is powered by at least one phase, the stator (1) comprising a plurality of coils (45) and the piece (60) being overmolded around a same number of coils (45) per phase. Boîtier (10) selon l'une quelconque des revendications précédentes, dans lequel la pièce (60) comprend un filtre de compatibilité électromagnétique (96).An enclosure (10) as claimed in any one of the preceding claims, wherein the part (60) comprises an electromagnetic compatibility filter (96). Boîtier (10) selon l'une quelconque des revendications précédentes, dans lequel ladite pièce (60) comprend une base (90), liée à la portion (61) et comprenant des orifices (91) agencés pour laisser passer un fluide frigorigène.An enclosure (10) as claimed in any one of the preceding claims, wherein said part (60) comprises a base (90) connected to the portion (61) and having orifices (91) arranged to pass a refrigerant. Boîtier (10) selon l'une quelconque des revendications précédentes, dans lequel ladite paroi (31) et ladite pièce (60) comprennent un moyen de centrage (80) de ladite pièce (60) par rapport à ladite paroi (31).Housing (10) according to any one of the preceding claims, wherein said wall (31) and said piece (60) comprise a centering means (80) of said piece (60) relative to said wall (31). Boîtier (10) selon l'une quelconque des revendications précédentes, dans lequel la paroi (31) accueille une extrémité (43) d'un arbre de transmission (11) d'un rotor (2) du moteur électrique (100).Housing (10) according to any one of the preceding claims, wherein the wall (31) accommodates an end (43) of a transmission shaft (11) of a rotor (2) of the electric motor (100). Boîtier (10) selon l'une quelconques des revendications 1 à 7, dans lequel la pièce (60) accueille une extrémité (43) d'un arbre de transmission (11) d'un rotor (2) du moteur électrique (100).Housing (10) according to any one of claims 1 to 7, wherein the part (60) accommodates an end (43) of a transmission shaft (11) of a rotor (2) of the electric motor (100) . Boîtier (10) selon la revendication 9, dans lequel l'ouverture (32) et au moins une partie du moyen de connexion électrique (50) se situent dans le prolongement d'un axe de rotation (A) de l'arbre de transmission (11) du moteur électrique (100).Housing (10) according to claim 9, wherein the opening (32) and at least a portion of the electrical connection means (50) lie in the extension of an axis of rotation (A) of the transmission shaft (11) the electric motor (100). Boîtier (10) selon l'une quelconque des revendications précédentes, dans lequel la pièce (60) comprend une première partie (62) traversant l'ouverture (32) et une deuxième partie (63) fixant ladite première partie (62) à la paroi (31).An enclosure (10) according to any one of the preceding claims, wherein the part (60) comprises a first portion (62) passing through the opening (32) and a second portion (63) securing said first portion (62) to the wall (31). Boîtier (10) selon la revendication 11, dans lequel la première partie (62) comprend un moyen d'agrafage (65) inséré dans l'ouverture (32) et encliqueté sur la paroi (31).The housing (10) of claim 11 wherein the first portion (62) includes stapling means (65) inserted into the aperture (32) and snapped onto the wall (31). Boîtier (10) selon la revendication 12, dans lequel la deuxième partie (63) comprend un embout (68) plaquant le moyen d'agrafage (65) contre la paroi (31).The housing (10) of claim 12, wherein the second portion (63) comprises a tip (68) plating the stapling means (65) against the wall (31). Boîtier (10) selon l'une des revendications 11 à 13, dans lequel la première partie (62) comprend au moins un dispositif d'étanchéité (70) assurant l'étanchéité entre la première partie (62) et la paroi (31).Housing (10) according to one of claims 11 to 13, wherein the first portion (62) comprises at least one sealing device (70) sealing between the first portion (62) and the wall (31) . Boîtier (10) selon l'une des revendications 11 à 14, dans lequel la portion (61) est la première partie (62), la deuxième partie (63) étant distincte de la première partie (62) et rapportée dans cette dernière.Housing (10) according to one of claims 11 to 14, wherein the portion (61) is the first portion (62), the second portion (63) being separate from the first portion (62) and reported therein. Boîtier (10) selon l'une des revendications 11 à 14, dans lequel la portion (61) est la deuxième partie (63), la première partie (62) étant distincte de la deuxième partie (63) et rapportée dans cette dernière.Housing (10) according to one of claims 11 to 14, wherein the portion (61) is the second portion (63), the first portion (62) being separate from the second portion (63) and reported therein. Boîtier (10) selon la revendication 16, dans lequel la deuxième partie (63) comprend au moins un dispositif d'étanchéité (75) assurant l'étanchéité entre la deuxième partie (63) et la paroi (31).Housing (10) according to claim 16, wherein the second portion (63) comprises at least one sealing device (75) sealing between the second portion (63) and the wall (31). Boîtier (10) selon l'une quelconque des revendications précédentes, dans lequel la portion (61) comprend une bague circulaire (69) plaquée contre ladite paroi (31).Housing (10) according to any one of the preceding claims, wherein the portion (61) comprises a circular ring (69) pressed against said wall (31). Boîtier (10) selon l'une quelconque des revendications précédentes, dans lequel le moyen de connexion électrique (50) comprend un terminal électrique (51) qui traverse la paroi (31) et débouche dans une zone où le dispositif de commande est apte à être connecté.Housing (10) according to any one of the preceding claims, wherein the electrical connection means (50) comprises an electrical terminal (51) which passes through the wall (31) and opens into an area where the control device is adapted to to be connected. Compresseur comprenant un boîtier (10) selon l'une quelconque des revendications précédentes et ledit dispositif de commande du moteur électrique (100).A compressor comprising a housing (10) as claimed in any one of the preceding claims and said electric motor controller (100). Compresseur comprenant un boîtier (10) selon l'une quelconque des revendications 1 à 18 et ledit dispositif de commande du moteur électrique (100), dans lequel ledit dispositif de commande du moteur électrique (100) comprend un terminal électrique (51) inséré dans ladite pièce (60) et connecté audit moyen de connexion électrique (50).A compressor comprising a housing (10) according to any one of claims 1 to 18 and said electric motor controller (100), wherein said electric motor controller (100) comprises an electrical terminal (51) inserted into said piece (60) and connected to said electrical connection means (50).
EP20130183408 2012-09-13 2013-09-06 Housing for electric compressor Not-in-force EP2708747B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1258624A FR2995368B1 (en) 2012-09-13 2012-09-13 BOX OF AN ELECTRIC COMPRESSOR AND ELECTRIC COMPRESSOR COMPRISING SUCH A BOX

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EP2708747B1 EP2708747B1 (en) 2015-04-08

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090285703A1 (en) * 2006-07-12 2009-11-19 Masahiko Osaka Motor-Driven Compressor
EP2221477A1 (en) * 2007-11-16 2010-08-25 Sanden Corporation Electric compressor terminal device
US20110211980A1 (en) * 2008-11-06 2011-09-01 Makoto Shibuya Inverter Integrated Electric Compressor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090285703A1 (en) * 2006-07-12 2009-11-19 Masahiko Osaka Motor-Driven Compressor
EP2221477A1 (en) * 2007-11-16 2010-08-25 Sanden Corporation Electric compressor terminal device
US20110211980A1 (en) * 2008-11-06 2011-09-01 Makoto Shibuya Inverter Integrated Electric Compressor

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FR2995368A1 (en) 2014-03-14
EP2708747B1 (en) 2015-04-08

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