Electrical feedthrough assembly and electric compressor including same

Abstract

The utility model provides an electrical feed-through assembly and an electric compressor comprising the same. The electrical feedthrough assembly comprises a base body configured to be attached to the housing and comprising at least one electrical feedthrough, each comprising an opening in the base body through which the conductor passes and is embedded in a fixing material (16) sealing the opening, the electrical feedthrough assembly further comprising at least one insulating element fixed to the base body. And at least one insulating element including at least one insulating portion, each having a conductor opening through which a respective conductor passes, the insulating element being arranged such that a contact portion of each insulating portion is in contact with the adhesive material. Each insulating portion is formed with an air channel, the top wall of which is formed by an insulating element, and the air channel completely surrounds the contact portion of the respective insulating portion. The electrical feedthrough assembly further comprises at least one further insulating element disposed on a side of the base opposite the at least one insulating element, the insulating element being bonded to the base and / or the fixing material.

Description

Technical Field

[0001] The utility model relates to an electrical feedthrough assembly. Preferably, the electrical feedthrough assembly is configured as an electric compressor terminal and includes at least one electrical feedthrough, each electrical feedthrough including an opening for a conductor in a substrate, the conductor passing through the opening and embedded in a fixing material that seals the opening of the electrical feedthrough, wherein the electrical feedthrough assembly also includes at least one insulating element, which is fixed to the substrate by an adhesive material. Background Art

[0002] The housing of an electronic component is typically provided with a plurality of electrical feedthroughs to enable electrical connection from the outside to the interior of the housing, which houses, for example, an electric compressor component. The electrical feedthroughs should be liquid-tight, or even air-tight, to protect the components within the housing from environmental influences and / or to avoid the inclusion of gases or fluids within the housing. In order to provide such liquid-tight or air-tight feedthroughs for electrical conductors disposed in the housing opening, a glass-to-metal seal can be used. A fixing material (e.g., a glass material) is used to seal the opening and retain the conductor within the opening. The fixing material also provides electrical insulation between the conductor and the housing.

[0003] To provide additional electrical insulation between the housing and the conductors, if more than one conductor is present between them, it is known to provide additional insulating elements on the electrical feedthroughs. These insulating elements at least partially surround the conductors and extend the so-called creepage distance between the conductor and the housing and / or between two conductors. For example, the insulating element used to extend the creepage distance can be an insulating rubber or plastic sleeve or cylinder that at least partially surrounds the conductors.

[0004] WO2022259597A1 describes an airtight terminal having a metal base having at least one opening. A connecting wire is inserted through the opening, and a fixing material seals the opening. The terminal also includes an insulating barrel having at least one circumferential groove on the outer wall. The insulating barrel is made of an elastic rubber or plastic material having heat resistance and oil / refrigerant resistance, and is airtightly bonded to the fixing material or base by an adhesive layer. Plastic materials suitable for the insulating barrel include polybutylene terephthalate (PBT), polyphenylene sulfide (PPS) or polyetheretherketone (PEEK). Suitable rubber materials include hydrogenated nitrile rubber (HNBR) or ethylene propylene diene monomer (EPDM) rubber. In order to bond the insulating barrels made of PPS and EPDM, an epoxy resin adhesive is used.

[0005] However, it is difficult to reliably apply the right amount of adhesive to securely attach the insulating elements together without creating any bubbles or gaps in the glue, or allowing excess glue to overflow onto other parts of the feedthrough. Excess glue could clog parts of the feedthrough assembly that need to be mounted to the housing, or could cover parts of the conductors that make electrical contact (e.g., with a connector). Furthermore, any gaps or bubbles could negatively impact the insulating properties of the insulator and could allow dust or water to damage the connection. Utility Model Content

[0006] The utility model aims to provide a feedthrough assembly having at least one sealed conductor and an additional insulating element for extending the creepage distance between the conductor and the substrate of the feedthrough. The feedthrough assembly is easy to manufacture and can realize reliable connection of the insulating element.

[0007] An electrical feedthrough assembly is provided, comprising a base configured to be attached to a housing and comprising one or more electrical feedthroughs. Each electrical feedthrough comprises an opening in the base for a conductor, the conductor passing through the opening and embedded in a fixing material, the fixing material sealing the opening of the electrical feedthrough. The electrical feedthrough assembly further comprises at least one insulating element fixed to the base by an adhesive material, wherein at least one insulating element comprises at least one insulating portion, wherein each electrical feedthrough has a designated insulating portion. Each insulating portion has a conductor opening, through which a corresponding conductor passes, wherein the insulating element is configured and arranged so that a contact portion of each insulating portion contacts the adhesive material, and wherein each insulating portion is formed with an air channel. The top wall of the air channel is formed by the insulating element, and the air channel completely surrounds the contact portion of the corresponding insulating portion.

[0008] Insulating elements, in combination with adhesive materials, serve to electrically insulate the conductors of an electrical feedthrough. This additional electrical insulation increases the electrical insulation distance, or creepage distance, between the conductor and the substrate and / or between the two conductors. Thus, the insulating element helps reduce the risk of short circuits, particularly in damp or humid environments. In such environments, layers of water and / or dirt, etc., may deposit on the surface of the feedthrough assembly, particularly on the surface of the fixing material insulating the conductor from the substrate. In electric compressors where the feedthrough assembly is configured as an electric compressor terminal, such a water film is particularly susceptible to wetting the feedthrough assembly material. This is because electric compressors operate at very low temperatures, for example, below 5°C or even below zero, while the ambient temperature (e.g., in summer) may be above 20°C. In such situations, a water film may form due to condensation. By additionally insulating the conductor from the substrate material, and thereby from the housing of the device including the feedthrough assembly (e.g., in electric compressor applications), short circuits caused by conductive water and / or dirt films can be prevented.

[0009] Air channels form a connection between the adhesive surface and the surrounding environment, allowing any gas (e.g., air) that may be trapped within the adhesive to escape. This reduces the risk of gaps, such as trapped air bubbles, in the adhesive. Because the insulating element's material, as well as the adhesive, acts as electrical insulation for the conductor, any gaps impair insulation performance and must be avoided.

[0010] Preferably, a recess of the adhesive material is defined by the substrate and the fixing material, wherein the opening is located within the recess, and the contact portion of the insulating portion includes a protrusion extending into the recess, thereby forming a gap between the sidewalls of the recess and the sidewalls of the protrusion. The contact portion and the adhesive can be arranged so that the adhesive only directly contacts the contact portion and does not contact the sidewalls of the protrusion. Optionally, the adhesive material is arranged so that the adhesive at least partially fills the gap. Preferably, the distance that the protrusion extends into the recess is in the range of 0.05 mm to 0.5 mm. For example, it is preferably in the range of 0.1 mm to 0.2 mm.

[0011] The advantage of this arrangement is that the recess provides a space or reservoir for the adhesive material. In addition to the air gap, the recess can also accommodate any excess adhesive material that is not required to connect the contact portion of the insulating part to the substrate and / or the fixing material. This prevents the adhesive material from spilling onto other parts of the substrate (e.g., parts that may serve as sealing surfaces). The provided reservoir can compensate for tolerances in the dosing of the adhesive material.

[0012] Preferably, the recesses and / or protrusions have sloping side walls. The sloping side walls of the recesses reduce the risk of gaps forming in the adhesive or air bubbles being trapped in the adhesive material.

[0013] In embodiments where the recess has sloped sidewalls, the protrusion of the insulating portion with the contact portion preferably has a shape that matches the sloped sidewalls. While the shape of the contact portion is preferably the same as that of the recess, the dimensions of the contact portion are preferably selected to be smaller than those of the recess. This ensures that there is always a gap between the sidewalls of the recess and the sidewalls of the protrusion of the insulating portion. This gap ensures that no seal is formed between the sidewalls and the insulating portion, allowing any air trapped in the adhesive to escape.

[0014] The shape of the rubber insulating element is preferably selected so that, when the rubber insulating element is attached to the substrate, a gap always exists between the surface of the contact portion configured as the insulating portion and the fixing material and / or substrate. This ensures that a layer of adhesive material having a defined minimum thickness is always present between the fixing material and / or substrate and the contact portion. The shape of the rubber insulating element may include protrusions designed to directly abut against the substrate to establish a defined relative position between the rubber insulating element and the substrate.

[0015] The thickness of the adhesive material is preferably in the range of 0.05 mm to 1 mm, preferably in the range of 0.1 mm to 0.5 mm, particularly preferably in the range of 0.2 mm to 0.3 mm.

[0016] Preferably, the adhesive is an epoxy resin adhesive, an acrylate adhesive, a polyurethane adhesive or a silicone adhesive.

[0017] Preferably, the width of the contact portion is in the range of 1 mm to 3 mm. In combination with the typical material of the insulating element, this width ensures that sufficient dielectric strength is provided for the component surrounding the insulating portion of the conductor.

[0018] Therefore, the material of the insulating element and its geometry, in particular the thickness of the material surrounding the conductor, are preferably selected to achieve a predetermined dielectric strength. Similarly, the width and / or height of the adhesive material and the layers formed therefrom are preferably selected to achieve a predetermined dielectric strength. For example, the material of the insulating element and / or the width of the adhesive material surrounding the conductor are preferably selected within a range of 0.1 mm to 2 mm, more preferably within a range of 0.2 mm to 1 mm.

[0019] The contact portion of the insulating element is configured and arranged so that not the entire surface of the adhesive material facing the insulating element is contacted. Therefore, a portion of the surface of the adhesive material remains open, allowing any gas (e.g., air) to leave the adhesive material and enter the air channel.

[0020] Preferably, the width of the air channel is in the range of 0.2 mm to 1 mm. For example, the width of the air channel is 0.5 mm. Preferably, the height of the air channel is in the range of 0.2 mm to 1 mm. For example, the height of the air channel is 0.5 mm. These dimensions provide an air channel that is large enough to allow any trapped gas (e.g., air) to escape from the adhesive material and provide space to accommodate excess adhesive material.

[0021] Preferably, the insulating element comprises one insulating portion for each electrical feed-through and is formed as a single unitary element. Optionally, the electrical feed-through assembly comprises one insulating element for each electrical feed-through, wherein each insulating element has one insulating portion.

[0022] Preferably, at least one insulating portion of the insulating element has a cylindrical portion comprising a conductor opening and extending along a portion of the conductor. Preferably, the cylindrical portion has an annular groove and / or annular ribs, in particular on the wall facing outwards, which grooves and / or ribs can be used to provide a seal for a connector attached to the conductor.

[0023] Such connectors can be secured in place by means of ridges or grooves. Furthermore, when the connector is attached, the ribs, ridges, or grooves can provide a seal to prevent dust or fluid from entering the space between the conductor and the cylindrical portion. The arrangement of ribs, rings, ridges, and / or grooves can form an annular ring or groove. Alternatively, an embedded ring can be arranged on the outwardly facing wall of the cylindrical portion. For example, such an embedded ring can be secured in a groove provided on the outwardly facing wall of the extension.

[0024] Preferably, the top surface of the insulating portion is provided with an annular groove surrounding the conductor opening, wherein the groove further increases the creepage distance between the base body and the conductor.

[0025] Preferably, the conductor opening of each insulating portion is configured to provide an airtight seal around the conductor. This ensures that no moisture or dust can affect the contact between the adhesive and the conductor.

[0026] The feedthrough assembly may include additional insulation on a second, opposite side of the substrate. In this case, the additional insulation may be configured in the same manner as or differently from the insulation element on the first side of the substrate. For example, a single insulation element may be provided as a single, integral element on the first side, and one insulation element may be provided for each conductor on the second side.

[0027] Preferably, the material of the matrix is ​​a metal. More preferably, the material of the matrix comprises steel, in particular stainless steel, most preferably structural steel, preferably microalloyed steel, most preferably structural steel in the form of microalloyed steel. Microalloyed steel is an alloy steel containing a small amount of alloying elements (0.05% to 0.15%), including niobium, vanadium, titanium, molybdenum, zirconium, boron and rare earth metals. They are used to refine the grain microstructure or promote precipitation hardening. The yield strength of microalloyed steel without heat treatment is between 275 MPa and 750 MPa. It has good weldability and can even be improved by reducing the carbon content while maintaining strength. Its fatigue life and wear resistance are better than similar heat-treated steels. Cold-worked microalloyed steel does not require too much cold working to achieve the same strength as other carbon steels; this also makes it have higher ductility. Using microalloyed steel as a material can provide higher bending stiffness and strength.

[0028] To improve the ability to resist high voltage flashover, the edges of the through-hole can be rounded or chamfered. This setting can reduce the appearance of sharp edges and thus reduce the intensity of the electric field.

[0029] Preferably, the base body comprises means for increasing the resistance to bending. Preferably, these means are selected from a raised area and / or an upper pulled edge, wherein the opening is located in the raised area.

[0030] Such an elevated region may be a single area containing all of the openings of the base. In an alternative embodiment, the base may include several separate elevated regions, each containing a single opening. For example, the elevated regions may be formed into a plate-like precursor of the base by a stamping process to form the base.

[0031] The upper pull edge and the base can be configured as a single component, or the upper pull edge can be configured as a separate component combined with the base by fusing. The advantage of the upper pull edge as a separate component is that the production of the two components, the base and the upper pull edge, can be organized separately.

[0032] However, in an alternative embodiment, it is necessary to reshape the base body to provide the upper pull edge. For example, such a reshaping process may be stamping a plate-like precursor element to form the base body.

[0033] Preferably, in embodiments where the substrate includes a raised portion, surrounds a through-hole for an electrical feedthrough, and / or includes a raised portion, and wherein the insulating element is positioned over the conductor on the side of the substrate having the raised portion, the insulating element preferably includes a skirt. The skirt is configured to surround at least a portion of the sidewall of the raised portion, thereby forming an additional air passage between the sidewall and the surrounding skirt. This additional air passage allows any trapped air in the adhesive to escape, while the skirt provides a barrier between the defined location of the adhesive and the sealing area of ​​the substrate. Any excess adhesive is then trapped by the skirt, allowing the sealing area to remain clean and free of adhesive material.

[0034] Preferably, the fixing material is selected from glass, ceramic or glass-ceramic materials. Preferably, the fixing material is a glass material, thereby providing a glass-to-metal seal (GTMS) between the substrate, the conductor and the fixing material.

[0035] Preferably, the substrate, at least one conductor, and the fixing material form a compression seal. Therefore, the substrate's first coefficient of thermal expansion is preferably selected to be greater than the fixing material's second coefficient of thermal expansion. Preferably, to achieve a compression seal, the difference between the first coefficients of thermal expansion is at least 2 ppm / K; more preferably, the difference between the first coefficients of thermal expansion is at least 5 ppm / K. Preferably, the conductor material's third coefficient of thermal expansion is selected to be approximately equal to or less than the fixing material's second coefficient of thermal expansion. Two coefficients of thermal expansion are considered to be approximately equal if their difference is less than 2 ppm / K.

[0036] As an alternative to compression sealing, the base material, the fixing material and the conductor material may be selected such that their respective coefficients of thermal expansion are approximately equal, wherein a difference of less than 2 ppm / K is considered to be approximately equal.

[0037] Preferably, the seal formed between the opening of the substrate, the fixing material and the conductor is an airtight seal. In particular, it has a helium leakage rate of better than 1.10 at a pressure difference of 1 bar. -7 mbar l / s, especially 1.10 -8 mbar l / s feedthroughs are considered gas-tight.

[0038] Preferably, the substrate comprises an adhesive region; preferably, the adhesive region is located within a recess having a roughness adapted to bond with the adhesive.

[0039] For example, rough areas can be provided by a stamping or embossing process to enhance the adhesion of the adhesive. This roughness can also be achieved by rolling a textured sheet or by using a tool to perform a stamping step to roll the texture. Due to the good adhesion, the connection between the material of the substrate and the adhesive is improved. Additionally or alternatively, structures such as tongues and / or pins and / or plugs can be provided in the adhesive area. Furthermore, structures such as annular embossing and / or annular grooves can be formed to improve adhesion. Such tongues can be formed from a sheet material, ultimately forming a mushroom-shaped head. Annular embossing can be performed around the fixing material, and the conductor can pass through the substrate in the annular embossing. In any case, the connection between the adhesive and the substrate can be improved by structuring the substrate surface in the adhesive area. In addition to or as an alternative to structuring part of the substrate surface, it is also conceivable to provide such a structure on part of the surface of the insulating element.

[0040] Preferably, part of the surface of the substrate is configured as a sealing area. In the sealing area, the surface of the substrate is preferably smooth and flat. Particularly preferably, the flatness of the substrate surface in the sealing area is at least 0.1 mm, preferably at least 0.07 mm, and most preferably 0.01 mm to 0.07 mm. Such a smooth and / or flat area is conducive to forming a good, tight seal. Surface roughness R z It is preferably 10 μm or better.

[0041] Preferably, the base of the feedthrough assembly includes mounting means to facilitate attachment of the feedthrough assembly to a housing or housing component of a device (e.g., an electric compressor). Preferably, the mounting means are configured as attachment holes or threaded holes, wherein, preferably, the base includes at least two of said holes. Additionally or alternatively, the base may include centering means, such as protrusions or recesses, to facilitate precise positioning of the base and, thereby, the feedthrough assembly relative to the housing or a portion of the housing of the device.

[0042] The base body can be configured as an elongated body, wherein all openings for the conductors are arranged along a line. However, other configurations are also possible, for example, a circular base body can be used, wherein the openings are evenly distributed along a circle.

[0043] The fixing material is preferably arranged so that, at least on the side facing the insulating element, it does not extend beyond the at least one opening of the base body. In particular, the formation of a glass meniscus around the conductor and extending beyond the base body should be avoided. In this arrangement, the fixing material can be arranged flush with the surface of the opening or can be recessed relative to the surface of the opening.

[0044] Arranging the fixing material so that it does not extend beyond the substrate allows the conductor to be bent without damaging the fixing material. For example, when a glass material is used as the fixing material, the glass meniscus that forms around the conductor and extends beyond the opening is subjected to strong forces when the conductor is bent, potentially causing the glass to crack or damage. Therefore, the proposed arrangement of the fixing material allows the conductor to be bent as desired. Furthermore, the shape of such a glass meniscus varies greatly, making it difficult to determine the exact amount of adhesive to be used.

[0045] Alternatively, the fixing material can be arranged such that it fills the opening and extends onto the substrate in the region surrounding the opening, wherein preferably the fixing material is free of a glass meniscus surrounding the conductor. In this configuration, the fixing material covering part of the surface of the substrate serves as additional electrical insulation.

[0046] Preferably, the insulating element is made of an elastic material, in particular a natural or synthetic rubber, in particular a fluoroelastomer, EPDM rubber, HNBR rubber or silicone rubber.

[0047] Other suitable materials for the insulation element include thermoplastic or thermosetting plastic materials.

[0048] For a housing of a motor-driven compressor that can be attached to the electrical feedthrough assembly, the insulating element can be disposed on a side facing the exterior of the housing. Additionally or alternatively, the insulating element can also be disposed on a side facing the interior of the housing. In particular, the assembly can include two insulating elements, one disposed on the exterior side and one disposed on the interior side.

[0049] For example, when the proposed electrical feedthrough assembly is connected to a motor compressor housing, preferably, silicone rubber is used as the insulating element on the inverter side of the assembly. Preferably, HNBR rubber is used as the insulating element on the motor side.

[0050] Preferably, the electrical feedthrough assembly is configured as a motor-compressor terminal, wherein the base is configured to be attached to a housing of the motor-compressor.

[0051] A method for manufacturing the electrical feedthrough assembly described herein is also disclosed. The method comprises the following steps:

[0052] - providing a substrate assembly comprising a substrate having at least one conductor embedded in a fixing material, the fixing material passing through an opening of the substrate to provide a glass-to-metal seal (GTMS),

[0053] - provide insulating elements, and

[0054] - coating the bonding area of ​​the base component and / or the bonding area of ​​the contact portion of the insulating element with an adhesive and placing the insulating element on the base component so that the conductors pass through the conductor openings of the corresponding insulating portion of the insulating element, wherein the insulating element is configured such that an air channel is formed around each contact portion.

[0055] Alternatively, another insulating element may be provided on the opposite side of the base body by rotating the base body and repeating the corresponding assembly steps.

[0056] The electrical feedthrough assembly herein is particularly suitable for use as a connection terminal of an electric compressor. The feedthrough assembly can be configured as a part of a housing of the electric compressor, or can be attached to the housing of the electric compressor or a part of the housing thereof.

[0057] Therefore, another aspect of the present invention is to provide an electric compressor comprising an electrical feedthrough assembly as described herein.

[0058] It will be understood that the features mentioned above and those described below can be used not only in the combination indicated in each case but also in other combinations or alone, without departing from the scope of the present invention.

[0059] The preferred embodiments of the present invention are shown in the drawings and will be explained in more detail in the following description, wherein the same reference numerals represent the same or similar parts or elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1a A perspective view of a feedthrough assembly including a base body and an insulating element according to a first exemplary embodiment is shown.

[0061] Figure 1b It shows the embodiment Figure 1a A cross-sectional side view of the feedthrough assembly is shown.

[0062] Figure 2a A perspective view of a feedthrough assembly including a base body and an insulating element according to a second embodiment is shown.

[0063] Figure 2b The second embodiment of the present invention is shown Figure 2a A cross-sectional side view of the feedthrough assembly is shown.

[0064] Figure 3A cross-sectional side view of a feedthrough assembly according to a third embodiment is shown.

[0065] Figure 4 A bottom view of a feedthrough assembly according to a third embodiment is shown.

[0066] Figure 5 A cross-sectional side view of a feedthrough assembly according to a fourth embodiment is shown. DETAILED DESCRIPTION

[0067] Figure 1a A perspective view of a feedthrough assembly 1 according to a first exemplary embodiment is shown. In the example shown, the feedthrough assembly 1 comprises three electrical feedthroughs 2. Each electrical feedthrough 2 has an opening 14 (see FIG. 1 ) located in a base body 10. Figure 1b ) and the conductors 12 passing through the respective openings 14. The fixing material 16 (see Figure 1b ) fixes the conductor 12 and seals the opening 14.

[0068] In the example shown, the base body 10 comprises two bores 19 for attaching the feedthrough assembly 1 to a housing (not shown).

[0069] The feed-through assembly 1 further comprises an insulating element 20 for enhancing electrical insulation. Figure 1b This is further described.

[0070] Figure 1b Shown Figure 1a The feedthrough assembly 1 shown is along Figure 1a Cross-section along line AA.

[0071] from Figure 1b As can be seen in the cross-sectional view of FIG, each of the three conductors 12 passes through an opening 14 in the substrate 10 and is held by a fixing material 16. The fixing material 16 is, for example, selected from glass and is electrically insulating. Furthermore, the fixing material 16 is arranged in such a way that it does not protrude beyond the opening 14. In particular, the fixing material 16 does not form a glass meniscus around the conductor 12 and beyond the substrate 10. Figure 1a and Figure 1b In the embodiment of the present invention, the base 10 is elongated, wherein the three openings 14 are arranged along a line. Other structures can also be adopted, for example, the openings 14 are evenly distributed along a circle on the base 10.

[0072] For example, the fixing material 16 is selected from a glass material and is configured and arranged so that each opening 14 is sealed. Figure 1b In the example shown, the fixing material 16 is also arranged so as not to protrude from the opening 14. In particular, no glass meniscus is formed around the conductor 12.

[0073] In order to further improve the electrical insulation between the base body 10 and the conductor 12, an insulating element 20 is provided. Figure 1a and Figure 1b In the exemplary embodiment, the insulating element 20 is attached to the upper side of the base 10. However, the insulating element 20 may also be provided on the bottom side of the base 10, and two insulating elements 20 may also be provided, one attached to the bottom side of the base 10 and the other attached to the top side of the base 10.

[0074] In the exemplary embodiment shown, the insulating element 20 includes three insulating portions 22, one for each feedthrough 2 and its corresponding conductor 12. Each insulating portion 22 has a conductor opening through which the corresponding conductor 12 passes, and each insulating portion 22 forms a seal with the corresponding conductor 12. In addition, the insulating portions 22 of the first embodiment have a common top wall including a groove 32 to further increase the creepage distance between two adjacent conductors 12.

[0075] Adhesive material 40 is used to attach insulating element 20 to base 10 and fixing material 16. Base 10 and fixing material 16 form recesses 18, wherein each insulating portion 22 has a protrusion 30 facing the corresponding recess 18. Adhesive material 40 is accommodated in recess 18 and directly contacts contact surfaces 26 of corresponding protrusions 30 of insulating portion 22. Because fixing material 16 is substantially flat and does not form a glass meniscus, the surface of fixing material 16 is substantially flat and transitions to the sidewalls of recess 18 provided in base 10 without any steps or gaps.

[0076] An air channel 28 is formed around protrusion 30 and, therefore, around conductor 12. The sidewalls of air channel 28 are defined by the sidewalls of protrusion 30, while the recessed area of ​​insulating element 20 defines the top wall of air channel 28. Contact surface 26 of insulating portion 22 is configured and arranged so as not to cover the entire surface of adhesive material 40 facing insulating element 20. The uncovered portion of adhesive material 40 allows gases, such as air, to escape from adhesive material 40 and into air channel 28. Air channel 28 is also open to the surrounding environment of electrical feedthrough assembly 1, allowing any gases or air to escape. In this way, adhesive material 40 forms a substantially gap-free, bubble-free layer.

[0077] To improve the resistance of the base body 10 to flexing or bending, the base body 10 includes a raised area 50 on the upper side and a corresponding recessed area 52 on the lower side. In the example shown, the raised area 50 is configured as a single raised area 50, and all electrical feedthroughs 2 are arranged on the raised area 50. Alternatively, the base body 10 can be equipped with a raised area 50 for each electrical feedthrough 2.

[0078] Figure 2aA perspective view of a feedthrough assembly 1 according to a second exemplary embodiment is shown. In the example shown, the feedthrough assembly 1 comprises three electrical feedthroughs 2. Each electrical feedthrough 2 has an opening 14 located in a base body 10 (see FIG. Figure 2b ) and the conductors 12 passing through the respective openings 14. The fixing material 16 (see Figure 2b ) fixes the conductor 12 and seals the opening 14.

[0079] In the example shown, the base body 10 comprises two bores 19 for attaching the feedthrough assembly 1 to a housing (not shown).

[0080] The feed-through assembly 1 further comprises three insulating elements 20 for enhancing electrical insulation, with each electrical feed-through 2 having one insulating element 20. Figure 2b The insulating element 20 is further described in detail.

[0081] Figure 2b Shown Figure 2a Feedthrough component 1 along Figure 2a The feedthrough assembly 1 of the second exemplary embodiment is similar to the reference embodiment except for the configuration of the insulating element 20. Figure 1a and Figure 1b According to the second exemplary embodiment, Figure 2a and Figure 2b Three insulating elements 20 are included, wherein each insulating element 20 has a single insulating portion 22 rather than a single insulating element 20 having three insulating portions 22 .

[0082] The insulating portion 22 of each insulating element 20 has a conductor opening through which each conductor 12 passes, and each insulating portion 22 forms a seal with the corresponding conductor 12. In addition, the top wall of the insulating portion 22 includes a groove 32 to further increase the creepage distance between two adjacent conductors 12 and between the conductor 12 and the base body 10.

[0083] An adhesive material 40 is used to attach the insulating element 20 to the base 10 and the fixing material 16. The base 10 and the fixing material 16 form a recess 18, wherein the insulating portion 22 of each insulating element 20 has a protrusion 30 facing the corresponding recess 18. The adhesive material 40 is received in the recess 18 and is in direct contact with the contact surface 26 of the corresponding protrusion 30 of the insulating portion 22.

[0084] An air channel 28 is formed around protrusion 30 and, therefore, around conductor 12. The sidewalls of air channel 28 are defined by the sidewalls of protrusion 30, while the recessed area of ​​insulating element 20 defines the top wall of air channel 28. Contact surface 26 of insulating portion 22 is configured and arranged so as not to cover the entire surface of adhesive material 40 facing insulating element 20. Portions of the surface of adhesive material 40 remain uncovered, allowing gases, such as air, to escape from adhesive material 40 and into air channel 28. Air channel 28 is also open to the surrounding environment of electrical feedthrough assembly 1, allowing any gases or air to escape. In this way, adhesive material 40 forms a substantially gap-free, bubble-free layer.

[0085] Figure 3 A cross-sectional side view of a feed-through assembly 1 according to a third exemplary embodiment is shown. Figure 1a and Figure 1b In the embodiment of the present invention, the electrical feed-through assembly 1 includes three electrical feed-throughs 2, each of which has an opening 14 in a base body 10 through which a conductor 12 passes. A fixing material 16 seals each opening 14 and holds the conductor 12.

[0086] In this third exemplary embodiment, the electrical feedthrough assembly 1 comprises two insulating elements 20 , 20 ′: one insulating element 20 is arranged on the top side of the base body 10 and the other insulating element 20 ′ is arranged on the bottom side of the base body 10 .

[0087] In order to improve the mechanical stability of the base body 10 , the base body 10 is provided with a recessed area 52 and a corresponding raised area 50 . Three electrical feedthroughs 50 are arranged in the recessed area 52 and the corresponding raised area 50 .

[0088] The insulating element 20 provided on the upper side is configured as a single insulating element 20 having three insulating portions 22. Each insulating portion 22 has a protrusion 30 defining a contact portion 26 that is in direct contact with the adhesive material 40. The side walls of the protrusion 30 define the side walls of the air channel 28, and the recessed portion of the insulating element 20 defines the top wall of the air channel 28. In addition, each insulating portion 22 includes a cylindrical portion 38 that extends along the corresponding conductor 12 and forms a seal between the conductor 12 and the insulating portion 22. Figure 3 In the example shown, the cylindrical portion 38 is provided with ribs 34 that may be used to form a seal between the insulating portion 22 and a connector (not shown) attached to the corresponding conductor 12 .

[0089] In this example, the other insulating element 20' disposed on the bottom side is also configured as a single insulating element having three insulating portions 22. Each insulating portion 22 has a protrusion 30 that defines a contact portion 26 that directly contacts the adhesive material 40. The sidewalls of the protrusion 30 define the sidewalls of the air channel 28, and the recessed portion of the other insulating element 20 defines the top wall of the air channel 28. To increase the height of the air channel 28, the insulating portion 22 of the other insulating element 20' includes a step 25. In addition, each insulating portion 22 includes a cylindrical portion 38 that extends along the corresponding conductor 12 and forms a seal between the conductor 12 and the insulating portion 22.

[0090] exist Figure 3 In the example shown, the fixing material 16 is not flush with the surface of the opening 14, but is recessed, thereby forming a pocket 18 for receiving the adhesive material 40. Any excess adhesive material 40 can be contained within the pocket 18. Where another insulating element 20' is employed, a skirt 36 is provided that surrounds the raised area 50 and forms another air passage 37. The purpose of the skirt 36 is to further contain excess adhesive material 40 while still allowing any gas or trapped air to escape into the surrounding environment.

[0091] Figure 4 A bottom view of an electrical feedthrough assembly 1 according to a third embodiment is shown. The skirt 36 of the further insulating element 20' completely surrounds the raised area 50 and acts as an additional barrier to prevent any excess adhesive material 40 from escaping into the sealing area 60. The sealing area 60 can be used to form a seal between the electrical feedthrough assembly 1 and a housing to which the electrical feedthrough assembly 1 is attached, for example, via an O-ring seal.

[0092] Figure 5 1 shows a cross-sectional side view of an electrical feed-through assembly 1 according to a fourth embodiment. Figure 3 and Figure 4 The third embodiment described differs in the configuration of the base 10. The base 10 of the fourth embodiment is flat and does not include the raised area 50 and the recessed area 52. Because the raised area 50 is absent, the further insulating element 20' on the bottom is configured without the skirt 36.

[0093] Although the present invention has been described with reference to preferred examples of embodiment, the present invention is not limited thereto but can be modified in various ways.

[0094] Reference Signs List

[0095] 1-Electrical feedthrough assembly

[0096] 2-Electrical feedthrough

[0097] 10-Matrix

[0098] 12-conductor

[0099] 14-Opening

[0100] 16-Fixing material

[0101] 18-Concave

[0102] 19-Drilling

[0103] 20, 20'-Insulation element

[0104] 22-Insulation part

[0105] 24-conductor opening

[0106] 26-Contact Department

[0107] 28-Air channel

[0108] 30-protrusion

[0109] 32-groove

[0110] 34-ribs

[0111] 36-Skirt

[0112] 37-Another air channel

[0113] 38-Cylindrical part

[0114] 40- Adhesive material

[0115] 50-rise zone

[0116] 52-Depression area

[0117] 60-Sealed area.

Claims

1. An electrical feedthrough assembly (1) for an electric compressor, comprising a base body (10) configured to be attached to a housing and comprising at least one electrical feedthrough (2), each electrical feedthrough (2) comprising an opening (14) in the base body (10) for a conductor (12), the conductor (12) passing through the opening (14) and embedded in a fixing material (16), the fixing material sealing the opening (14) of the electrical feedthrough (2), wherein The electrical feedthrough assembly (1) further comprises: At least one insulating element (20, 20') fixed to the base body (10) by means of an adhesive material (40); characterized in that the at least one insulating element (20, 20') includes at least one insulating portion (22), wherein each electrical feedthrough (2) has a designated insulating portion (22), each insulating portion (22) has a conductor opening (24), and the corresponding conductor (12) passes through the conductor opening (24), and the insulating elements (20, 20') are configured and arranged so that the contact portion (26) of each insulating portion (22) is in contact with the adhesive material (40); and characterized in that each insulating portion (22) is formed with an air channel (28), the top wall of the air channel (28) being formed by the insulating element (20, 20'), the air channel (28) completely surrounding the contact portion (26) of the corresponding insulating portion (22), and Characterized in that the feedthrough assembly (1) comprises at least one further insulating element (20') which is arranged on a side of the base body (10) opposite to the at least one insulating element (20), the insulating element (20') being bonded to the base body (10) and / or the fixing material (16).

2. The electrical feedthrough assembly (1) according to claim 1, characterized in that The recess (18) of the adhesive material (40) is defined by the base (10) and the fixing material (16), wherein the opening (14) is located within the recess (18), and is characterized in that the contact portion (26) of the insulating portion (22) includes a protrusion (30) extending into the recess (18), thereby forming a gap between the sidewalls of the recess (18) and the sidewalls of the protrusion (30), wherein the adhesive material (40) at least partially fills the gap; And / or, the recess (18) and / or the protrusion (30) have inclined side walls.

3. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The maximum thickness of the adhesive material (40) is in the range of 0.05 mm to 1 mm.

4. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The width of the contact portion (26) is in the range of 1 mm to 3 mm.

5. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The width of the air channel (28) is in the range of 0.2 mm to 1 mm, and / or The height of the air channel (28) is in the range of 0.2 mm to 1 mm.

6. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The insulating element (20, 20') comprises one insulating portion (22) for each electrical feed-through (2) and is formed as a single integral element, or Characterized in that the electrical feedthrough assembly (1) comprises an insulating element (20, 20') for each electrical feedthrough (2), wherein each insulating element (20, 20') has an insulating portion (22).

7. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The base body (10) comprises means for improving bending resistance, said means being selected from: - a raised area (50), wherein the opening (14) is located within the raised area (50); and / or -Pull up the sides.

8. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The base body (10), the at least one conductor (12), and the fixing material (16) form a compression seal.

9. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The substrate (10) includes an adhesive region, the roughness of the adhesive region being used to bond with the adhesive material (40).

10. The electrical feed-through assembly (1) according to claim 9, characterized in that The bonding area is located within the recess (18).

11. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The fixing material (16) does not extend beyond the at least one opening (14) in the base body (10) on the side facing the insulating element (20, 20'), or, wherein the fixing material (16) is flush with the opening (14), or The fixing material (16) extends onto the base body (10) in a region surrounding the opening (14).

12. The electrical feed-through assembly (1) according to claim 11, characterized in that The fixing material (16) is free of a glass meniscus surrounding the conductor (12).

13. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The insulating element (20, 20') is made of fluorine-containing elastomer, ethylene propylene diene monomer (EPDM) rubber, hydrogenated nitrile butadiene rubber (HNBR) or silicone rubber.

14. The electrical feed-through assembly (1) according to any one of claims 1 to 2, characterized in that The electrical feedthrough assembly (1) is configured as an electric compressor terminal, wherein the base (10) is configured to be attached to a housing of an electric compressor.

15. An electric compressor, characterized in that: Comprising an electrical feed-through assembly (1) according to any one of claims 1 to 14.

Images