Feedthrough and sealing devices

Abstract

The configuration within the feedthrough and sealing device is simplified to provide improved electrical insulation against refrigerant and oil fluids. The present invention relates to an electrical connection feedthrough and sealing device (13, 13') that is fed through a housing wall (14a, 14a') of an electric motor or other electric device, the feedthrough and sealing device (13, 13') being fed through the housing wall of the electric motor.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION The present invention relates to a feedthrough and sealing system for electrical connections provided through the housing wall of an electric motor or other electrical device. [Background technology]

[0002] Electric compressors for vehicle air conditioning are a major application area for feedthroughs and sealing devices. Vehicle air conditioning compressors primarily contain mechanical components filled with gaseous refrigerant and oil, also known as 3 / 4 pumps. This component is sealed from the electronic components (the so-called inverter) to prevent damage to the electrical components on the printed circuit board due to fluid intrusion of refrigerant and / or oil. It is important to consider that short circuits can occur if liquid comes into contact with electrical components. However, the most important thing is to prevent refrigerant loss. Air conditioning systems have a limited service life. Refrigerant loss can lead to system failure and is unacceptable for environmental reasons.

[0003] Standard glass-to-metal seals are primarily used to connect the electrical connection to the terminal pins through the housing wall of the refrigerant compressor housing. Metal bead seals or elastomeric seals are used to seal the compressor and / or motor housing. Plastic sleeves or elastomeric seals are used to electrically insulate the electrical connection to the refrigerant. Open metal surfaces on the compressor are covered with elastomeric or plastic sleeves to maintain high internal insulation resistance.

[0004] The feedthrough and sealing device for electrical connection provided through the compressor housing wall includes at least one terminal pin made of an electrically conductive material. This terminal pin is provided through a metal plate, also referred to as a metal E-pin plate and / or terminal pin plate. The terminal pin is surrounded by a glass insulator in the metal plate area and adjacent areas above and below the metal plate, realizing the aforementioned glass-to-metal seal. This glass-to-metal seal is sealed to the compressor and / or motor housing through a plate seal designed as a metal bead seal or an elastomeric polymer cord seal. The open metal surface of the compressor terminal pin is covered with a terminal pin cover designed in the form of a cylindrical plastic sleeve, which serves as electrical insulation against the refrigerant.

[0005] To ensure the firmness of such feedthroughs and sealing devices, linear and / or uniform compression of the sealing beads or sealing cords is required on a clean support surface of the motor housing, because impurities on such support surface cannot ensure good sealing.

[0006] The disadvantage of this method is that it is relatively complex because two or more parts are required to seal the terminal pin plate and cover the terminal pins. This requires a high level of assembly work and results in non-sealed areas. Furthermore, the various components have different expansion coefficients, which can affect their technical performance during heat resistance tests due to temperature changes. Therefore, metal plates for electrical feedthroughs are generally made of steel. Metal pin covers are generally made of plastic or elastomeric polymers. In contrast, compressor motor housings are often made of aluminum. In particular, during some test cycles, where the maximum temperature is 125°C and the minimum temperature is -40°C, the expansion and contraction of the seal due to temperature changes can stress the entire electrical feedthrough assembly and reduce the residual torque of the fastening screws, potentially resulting in the loss of the fastening screws. In the worst case scenario, this can lead to refrigerant leakage from the electrical feedthrough area. Summary of the Invention [Problem to be solved by the invention]

[0007] It is an object of the present invention to reduce the number of components in the feedthrough and sealing device, simplify assembly, and provide safer electrical insulation against refrigerant and oil fluids.

[0008] The object of the invention is achieved by a feed-through and sealing device with the features of patent claim 1. Some preferred embodiments and further improvements are described in the dependent claims. [Means for solving the problem]

[0009] The feedthrough and sealing device for electrical connections provided through the housing wall of an electric motor or other electrical device according to the present invention is constructed as follows.

[0010] The feed-through and sealing device according to the present invention is characterized in that it comprises: a terminal pin plate in the form of a metal plate having at least one feed-through opening through which a terminal pin made of an electrically conductive material is fed and extends, the terminal pin being electrically insulated from the metal plate by a glass insulator surrounding the terminal pin in the area of ​​the feed-through opening; a plate support surface for the metal plate in a housing wall; a sealing surface of the housing wall surrounded by the plate support surface for the metal plate; at least one feed-through opening surrounded by the sealing surface for feeding through the at least one terminal pin through the housing wall; and at least one terminal pin cover in the form of a cylindrical plastic or elastomer sleeve having a flat plate sealing area disposed on the housing between the metal plate and the sealing surface and a front opening surrounded by the flat plate sealing area, the at least one terminal pin cover connected to each other, the at least one terminal pin cover being inserted into the at least one feed-through opening in the housing wall when feeding through the terminal pin through the housing wall. [Effects of the Invention]

[0011] Therefore, the object of the present invention is achieved in that the two sealing functions mentioned above, i.e., sealing of the terminal pin plate and covering of at least one terminal pin, are realized by one component, i.e., the combined sealing part, that is, the sealing part combines the functions of E-pin plate sealing and E-pin cover.

[0012] This reduces complexity and costs, which in turn reduces the significant costs associated with assembly operations, and also meets requirements related to creepage paths, insulation resistance, cleanliness, and prevention of dust, particles, and oil deposition on glass insulation. [Additional means to solve the problem]

[0013] According to a preferred embodiment of the present invention, the feedthrough and sealing device has three terminal pins, and for these terminal pins, it has three feedthrough openings in the metal wall, three feedthrough openings in the housing wall, and a combined sealing part with three terminal pin covers, which means that the seal of the three-phase connector can also be designed as a combined sealing part that connects the terminal pin covers and the metal plate seal with each other.

[0014] According to a preferred embodiment of the present invention, the outer edge of the flat plate sealing area is elliptical, and in this case, it is preferred that the metal plate support surface of the housing has an elliptical groove corresponding to the ellipse of the flat plate sealing area in the area surrounding the feed-through opening, thereby forming the support surface of the flat plate sealing area at the mating sealing part.

[0015] Preferably, the circumferential sealing cord is additionally designed at the outer edge of the flat plate sealing area. According to the above-mentioned embodiment, the circumferential sealing cord is preferably in the form of an oval sealing ring surrounding the flat plate sealing area.

[0016] The joint sealing part consisting of the E-pin plate seal and E-pin cover can be embodied as either a single-material component or a dual-material component consisting of a soft component and a hard component. This variation is particularly useful when sufficient security must be provided for the so-called concealer, i.e., the cylindrical terminal pin cover part designed to be pressed onto the electrical interface of a motor or electrical device, so that the concealer does not break and is pressed onto the electrical interface (motor interface). Glass fiber-reinforced polyamide is particularly suitable as a material for the hard component. In particular, elastomeric polymers such as ethylene propylene diene (monomer) rubber (EPDM) have proven advantageous as a material for the soft component. The hard and soft components can be connected to each other by bonding. Therefore, the hard and soft components can be adhesively bonded to each other, for example, through adhesive bonding or vulcanization.

[0017] If there is no risk of the concealer being folded, the combined sealing portion consisting of the terminal pin plate seal and the terminal pin cover can be embodied as a single material component, for example, made of an elastic polymer alone. The feedthrough and sealing device according to the present invention allows for a simplified configuration of a long and narrow terminal pin plate. Drooping of the terminal pin plate due to the internal pressure of the compressor can be compensated for by the elastic polymer seal. Generally, it is sufficient to fasten the terminal pin plate to the housing with two screws at each end portion opposite the long side. The details, features, and advantages of the embodiments of the present invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. [Brief explanation of the drawings]

[0018] [Figure 1] 1 shows a prior art feedthrough and sealing arrangement for electrical connections provided through the housing wall of an electric motor or other electrical device. [Figure 2] 1 shows, in prior art, an area of ​​a motor housing where the metal bead seal and feed-through openings for electrical connections fed through the housing wall are visible. [Figure 3a] 1 is a cross-sectional view of a feedthrough and sealing device of a prior art three-phase connector. [Figure 3b] 1 is a detailed cross-sectional view of a feedthrough and sealing device in the area of ​​one of the terminal pins of a prior art three-phase connector. [Figure 4a] 4a shows various components of a feedthrough and sealing device according to the present invention;FIG. 4a is a plan view of an integrated terminal pin plate;FIG. [Figure 4b] 4a and 4b show various components of a feedthrough and sealing device according to the present invention, and are perspective views illustrating a terminal pin plate and a mating sealing portion that is placed on the housing prior to installation of the terminal pin plate. [Figure 4c]1 is a perspective view illustrating the bonded sealing portion of the single material component with the support surface of the housing before the sealant component is placed and / or installed in the housing. [Figure 4d] FIG. 1 is a plan view of the coupled sealing components disposed or inserted into the housing. [Figure 5a] 1 is a perspective view of an engine housing area to be sealed and a combined sealing portion of a single material construction before the sealing components are placed and / or installed on the housing. FIG. [Figure 5b] FIG. 10 is a detailed partial cross-sectional view of the coupling sealing portion. [Figure 6a] 6a shows various components of a feedthrough and sealing device according to the present invention;FIG. 6a is a plan view of an integrated terminal pin plate;FIG. [Figure 6b] 6a and 6b show various components of a feedthrough and sealing device according to the present invention, and Fig. 6b is a perspective view illustrating a terminal pin plate and a mating sealing part disposed on a housing prior to installation of the terminal pin plate. [Figure 6c] 6a and 6b show various components of a feedthrough and sealing device according to the present invention, and Fig. 6c is a perspective view of the support surface of the housing and the mating sealing part as a dual material component before the sealant part is placed and / or installed in the housing. [Figure 6d] 6a and 6b show various components of a feedthrough and sealing device according to the invention, and Fig. 6d is a plan view of a mating sealing part positioned and / or inserted in a housing. [Figure 7a] 1 is a partial cross-sectional view of a mating sealing portion as a dual material component and a view showing the feed-through opening in the housing wall before inserting the sealing part. [Figure 7b] FIG. 10 is a detailed partial cross-sectional view of the coupling sealing portion. [Figure 8] FIG. 10 is a detailed cross-sectional view of a portion of the feedthrough and sealing device in the area of ​​a single terminal pin. [Figure 9] FIG. 1 is a cross-sectional view of an area within a compressor where a feedthrough and sealing device are installed. DETAILED DESCRIPTION OF THE INVENTION

[0019] Refrigerant compressors, also known as 3 / 4 pumps, have mechanical components that are primarily filled with gaseous refrigerant and oil. These components must be sealed with electronic components (inverters) that must be kept free of refrigerant and / or oil to prevent damage to the electronic components on the printed circuit board.

[0020] Glass-to-metal seals are often standard for electrical feedthroughs. They are sealed to the compressor housing using a metal bead seal or an elastomeric seal. A plastic sleeve or elastomeric seal provides electrical insulation for the refrigerant. The elastomeric or plastic sleeve covers the open metal surfaces of the compressor.

[0021] Figure 1 shows a conventional feedthrough and sealing device (1) for electrical connections that are fed through a compressor housing wall. It consists of a terminal pin (2) made of an electrically conductive material fed through a metal plate (3). This is surrounded by glass insulators (4) on the metal plate (3) and adjacent areas above and below the metal plate (3). The primary sealing function for the compressor's mechanical and electronic components, which are filled with refrigerant and oil, is ensured by a half-bead metal seal (hereinafter referred to as plate seal (5)) coated with acrylonitrile butadiene rubber (NBR), which is located between the metal plate (3) with the feedthrough terminal pin (2) and the plate support surface of the compressor housing (6).

[0022] The disadvantage is that two parts are required to seal the metal plate and / or terminal pin plate and the terminal pin cover, which is relatively complex, requires a high level of assembly work, and may result in the formation of non-sealed areas (8).

[0023] 2 shows the compressor housing 6 in terms of the plate seal 5, which is provided with a metal bead seal having an internal circumferential half-bead 9, and in terms of three feedthrough openings 10 in the wall 6a of the compressor housing 6, through which the electrical connection of a three-phase connector is conducted, as is also known in the art. Each of the three feedthrough openings 10 is located within an oval groove 11 in the wall 6a of the compressor housing 6. Additionally, four fixing holes 12 for fixing screws or bolts (not shown in FIG. 2) are provided in the wall 6a of the compressor housing 6 outside the oval groove 11 for fixing a metal plate (not shown) to the compressor housing 6.

[0024] Figure 3a shows a cross-sectional view of a prior art three-phase connector feedthrough and sealing device (1) in an assembled state. This feedthrough and sealing device (1) consists of three terminal pins (2) made of an electrically conductive material, which pass through a metal plate (3). A glass insulator (4) surrounds each terminal pin (2) in the area of ​​the metal plate (3) and in adjacent areas above and below the metal plate (3). The primary sealing function of the compressor's mechanical components relative to the electronic components is ensured by a half-bead-shaped metal seal (hereinafter referred to as plate seal (5)) coated with acrylonitrile butadiene rubber (NBR) located between the metal plate (3) into which the terminal pins are inserted and the plate support surface on the surface of the wall (6a) of the compressor housing (6). Here, plate seal (5) is designed with a circumferential half-bead (9). Figure 3b shows a detailed cross-sectional view of the three-phase connector feedthrough and sealing device, surrounded by glass insulator 4, in the area of ​​one of the three terminal pins 2 shown in Figure 3a. The feedthrough area through metal plate 3 is located within elliptical groove 11. Figure 3b also shows in more detail the circumferential half bead 9 of plate seal 5 located between metal plate 3 connected by terminal pin 2 and the plate support surface of compressor housing wall 6a.

[0025] As mentioned above, according to the prior art, the primary sealing function of the compressor mechanical components, which are filled with liquid refrigerant and oil to protect the electronic components (inverter) that must be kept dry, is performed by a half-bead NBR coated metal seal placed between the motor's terminal pin plate (3) and plate support surface (6). The sealing bead half-bead (9) is pressed by a fixing screw or bolt to secure the terminal pin plate (3), firmly connecting the mechanical and electronic components.

[0026] In addition to the drawbacks mentioned above, various components have different expansion coefficients, which causes them to behave differently in temperature safety tests depending on the temperature load. Therefore, metal plates for electrical feedthroughs are generally made of steel. Metal pin covers are generally made of plastic or elastomeric polymers. Meanwhile, compressor motor housings are made of aluminum. In particular, the expansion and contraction of seals during temperature changes (in some test cycles with a maximum temperature of 125°C and a minimum temperature of -40°C) places stress on the entire electrical feedthrough assembly, reducing the residual torque of the fastening screws, which can result in the loss of the fastening screws and, in the worst case scenario, causing leakage in the electrical feedthrough area.

[0027] Figures 4a to 4d show various components of a feedthrough and sealing device 13 for a three-phase connector according to the present invention. In this case, Figure 4a is a plan view of a terminal pin plate 15 disposed in a motor housing 14, with three terminal pins 2 arranged in a row and surrounded by glass insulators 4 in the feedthrough area passing through the terminal pin plate 15 and / or metal plate 15. The terminal pin plate 15 is trapezoidal and has four fixing holes 16 for fixing to the housing 14. Figure 4b is a perspective view of the terminal pin plate 15 with the terminal pins 2 fixed thereto and provided with glass insulators 4, and the mating sealing part 17 disposed on the motor housing 14 before the terminal pin plate 15 is installed.

[0028] FIG. 4c shows a perspective view of the plate support surface 18 of the housing 14, which includes three feedthrough openings 19, and the mating sealing portion 17, which is embodied in the form of a single material component, prior to placement and / or installation on and / or within the housing 14. The three feedthrough openings 19 are located in oval grooves 20 in the wall 14a of the compressor housing 14, which are surrounded by the plate support surface 18. The mating sealing portion 17 includes a flat plate sealing area 17a, which is provided to be positioned between a metal plate (see FIG. 4a) and a sealing support surface and / or sealing surface 21 within the groove 20 of the housing 14, and three terminal pin covers 17b, each designed in the form of a cylindrical plastic sleeve with a front opening surrounded by the flat plate sealing area 17a, which are connected to each other. Here, terminal pin cover 17b can be inserted into three feedthrough openings 19 in housing wall 14a to feed through three terminal pins of the terminal pin plate through housing wall 14a. Joint sealing portion 17 has an additional oval sealing ring 17c at the outer edge of flat plate sealing area 17a, which surrounds flat plate sealing area 17a as a circumferential sealing cord. Finally, Figure 4 shows a plan view of joint sealing portion 17 disposed on or inserted into wall 14a of housing 14 and plate support surface 18 with four fixing holes 22 corresponding to the four fixing holes of the terminal pin plate (see Figure 4a).

[0029] Figure 5a, similar to Figure 4c, is a perspective view of a motor housing (14) area where the sealing part (17) is sealed against an electronic component (inverter) before being placed and / or installed in the housing (14) and a mating sealing part (17) for a three-phase connector designed as a single-material part. Three feedthrough openings (19) are located in elliptical grooves (20), which are surrounded by a plate support surface (18). The mating sealing part (17) includes a flat plate sealing area (17a) that is provided to be placed between a metal plate (see Figure 4a) and the sealing support surface and / or sealing surface (21) in the groove (20) of the housing (14), and three terminal pin covers (17b), each designed in the form of a cylindrical plastic sleeve with a front opening surrounded by the flat plate sealing area (17a), which are connected to each other. Here, the terminal pin cover 17b is inserted into the three feed-through openings 19 of the housing wall 14a when feeding through the three terminal pins of the terminal pin plate through the housing wall 14a. The joining sealing part 17 has an additional oval sealing ring 17c at the outer edge of the flat plate sealing area 17a, which surrounds the flat plate sealing area 17a as a circumferential sealing cord.

[0030] 5b is a more detailed partial cross-section of the combined sealing portion 17, showing that all areas, i.e., the plate sealing area 17a, the upper area where the elliptical sealing ring 17c is located, and the three cylindrical and / or hollow cylindrical terminal pin covers 17b, are formed together from the same elastomeric polymer material. Each cylindrical terminal pin cover 17b has two beadings 17d arranged on top of each other and extending around the circumference of the cylinder jacket in the protruding thickness of the cylinder jacket in an area at the bottom of the cylinder jacket far from the plate sealing area 17a.

[0031] Figures 6a through 6d show various components of a feedthrough and sealing device 13' for a three-phase connector according to another embodiment. In this case, Figure 6a illustrates a plan view of a terminal pin plate 15' arranged on a motor housing 14', with three terminal pins 2 arranged in a row and surrounded by glass insulators 4 in the feedthrough area passing through the terminal pin plate 15' and / or metal plate 15'. Figure 6a illustrates a simplified version of the terminal pin plate 15', with an elongated oval outer contour and two fastening elements 23 at opposite end regions of the long sides of the terminal pin plate 15' for fastening the terminal pin plate 15' to corresponding fastening holes in the housing 14'. Typically, two screws are sufficient to fasten the terminal pin plate 15' to a plate support surface.

[0032] Figure 6b shows a perspective view of the terminal pin plate (15') fixed and provided with the glass insulator (4) and the mating sealing part (17') placed on the motor housing (14') before placing the terminal pin plate (15') on the plate support surface (18') (see Figure 6a).

[0033] 6c is a perspective view illustrating the plate support surface 18' of the housing 14' with three feedthrough openings 19' and a perspective view illustrating the mating sealing portion 17' embodied in a dual-material component prior to placement and / or installation on and / or within the housing 14'. The three feedthrough openings 19' are located within elliptical grooves 20' in the compressor housing 14' wall 14a' that are surrounded by the plate support surface 18'. The mating sealing portion 17' includes a flat plate sealing area 17a', which is disposed between the metal plate 15' and the sealing support surface and / or sealing surface 21' within the groove 20' of the housing 14', and three terminal pin covers 17b', each designed as a cylindrical plastic sleeve with a front opening surrounded by the flat plate sealing area 17a'. The terminal pin covers 17b' can be inserted into three feed-through openings 19' in the housing wall 14a' to feed through the three terminal pins of the terminal pin plate through the housing wall 14a'. The mating sealing portion 17' includes an additional oval sealing ring 17c' at the outer end of the flat plate sealing area 17a', which surrounds the flat plate sealing area 17a' as a circumferential sealing cord.

[0034] Finally, Figure 6d shows a plan view of the plate support surface (18') with the mating sealing part (17') located on the wall (14a') of the housing (14) and / or the wall (14a') inserted into the housing (14) and two fixing holes (22') corresponding to the two fixing elements (23) of the terminal pin plate (see Figure 6a).

[0035] Figure 7a is a partial cross-sectional view showing the feed-through opening (19') in the housing wall (14a') that is aligned with the mating sealing section (17') made of a dual-material component, prior to insertion of the mating sealing section (17') with an oval sealing ring (17c') in its upper region. The feed-through opening (19') is surrounded by a sealing surface (21'). Figure 7b shows a more detailed partial cross-sectional view of the mating sealing section (17'). The flat plate sealing area (17a') and the upper region where the oval sealing ring (17c') is located are made of an elastomeric polymer material, while the terminal pin cover (17b') is made of a rigid component.

[0036] 8 shows a detailed cross-sectional view of a portion of the feedthrough and sealing device 13' in the area of ​​the individual terminal pins 2 and the mating sealing part 17' as a dual-material component in this embodiment. Here, the glass insulator 4 surrounding the terminal pins in the area of ​​the feedthrough opening is in contact with the elastic part of the mating sealing part 17' in the sealing area 25. The area of ​​the terminal pin cover 17b', especially the so-called concealer 26, i.e., the part of the cylindrical terminal pin cover 17b' intended to be pressed onto the electrical interface of the same motor and / or electrical device as the cap, is formed of a rigid component.

[0037] Figure 9 shows a cross-sectional view of the area within the compressor where the feedthrough and sealing device (13') is installed, with the mating sealing part (17') made of a dual-material component for the three-phase connector. The dual-material component mating sealing part provides sufficient security for the three concealers (26) so that the concealer shells can be pressed onto the motor interface (27) without breaking. [Explanation of symbols]

[0038] 1. Prior Art Feedthrough and Sealing Devices 2 terminal pins 3-terminal pin plate, metal plate 4. Glass insulation 5 Plate seal 6 Housing, compressor housing 6a Housing wall, compressor housing wall 7 Terminal pin cover 8 Non-sealed areas 9 Half-bead 10 Feed-through opening in compressor housing wall 11 Oval groove 12 fixing holes 13 Feed-through and sealing devices 13' Feedthrough and sealing device 14 Housing, compressor housing 14a Housing wall, compressor housing wall, housing wall 14' Housing, Compressor Housing 14a' Housing wall, compressor housing wall, housing wall 15 terminal pin plate, metal plate 15' Terminal Pin Plate, Metal Plate 16 fixing holes 17 Joint sealing part 17a Plate sealing area 17b Terminal pin cover 17c oval sealing ring 17d Beading 17' Joint sealing part 17a' Plate sealing area 17b' Terminal pin cover 17c' oval sealing ring 18 Plate support surface 18' Plate Support Surface 19 Feedthrough opening 19' Feedthrough Opening 20 grooves 20' groove 21 Sealing Surface 21' sealing surface 22 fixing hole 22' fixing hole 23 Fixed Elements 24 Bonding Connection 25 Sealing Area 26 Concealer 27 Motor Interface

Claims

1. In a feed-through and sealing device (13, 13') for an electrical connection provided through a housing wall (14a, 14a') of an electric motor or other electric device, there is provided a terminal pin plate (15, 15') in the form of a metal plate (15, 15') having at least one feed-through opening (19, 19') through which a terminal pin (2) made of an electrically conductive material passes, the metal plate (15, 15') extending through the feed-through opening (19, 19') and electrically insulated by a glass insulator (4) surrounding the terminal pin (2) in the area of ​​the feed-through opening (19, 19'). a plate support surface (18, 18') for the metal plate (15, 15') on the housing wall (14a, 14a'); a sealing surface (21, 21') of the housing wall (14a, 14a') that is surrounded by the plate support surface (18, 18') for the metal plate (15, 15'); and at least one feed-through terminal pin (2) that is surrounded by the sealing surface (21, 21') for feed-through of the at least one terminal pin (2) through the housing wall (14a, 14a'). At least one terminal pin cover (17b, 17b') in the form of a cylindrical plastic or elastomer sleeve having a through opening (19, 19'), a flat plate sealing area (17a, 17a') disposed on the housing between the metal plate (15, 15') and the sealing surface (21, 21'), and a front opening surrounded by the flat plate sealing area (17a, 17a') are connected to each other, and the at least one terminal pin cover (17b, 17b') is connected to the housing wall (14a, 14b'). and a connecting sealing portion (17, 17') inserted into at least one of the feed-through openings (19, 19') of the housing wall (14a, 14a') when the terminal pin (2) is fed through the housing wall (14a, 14a'), the connecting sealing portion (17, 17') having an additional elliptical sealing ring (17c, 17c') at the outer edge of the flat plate sealing region (17a, 17a') which surrounds the flat plate sealing region (17a, 17a') as a circumferential sealing cord; The feedthrough and sealing device (13, 13') is characterized in that the terminal pin plate (15, 15') presses the coupling sealing portion (17, 17') from above, and the upper and lower bulging portions on the outer periphery of the elliptical sealing ring (17c, 17c') seal between the terminal pin plate (15, 15') and the sealing surface (21, 21').

2. 2. The feed-through and sealing device (13, 13') according to claim 1, characterized in that the feed-through and sealing device (13, 13') comprises three terminal pins (2), and the coupling sealing part (17, 17') comprises three feed-through openings (19, 19') in the metal wall, three feed-through openings (19, 19') in the housing wall (14a, 14a') and three terminal pin covers (17b, 17b') for the terminal pins (2).

3. 3. The feed-through and sealing device (13, 13') according to claim 1 or 2, characterized in that the outer edges of the flat plate sealing area (17a, 17a') are oval.

4. 4. The feed-through and sealing device (13, 13') according to claim 3, characterized in that the plate support surface (18, 18') for the flat plate sealing area (17a, 17a') of the combined sealing part (17, 17') combined with the plate support surface (18, 18') for the metal plate (15, 15') in the area surrounding the feed-through opening (19, 19') forms an elliptical groove corresponding to the ellipse of the flat plate sealing area (17a, 17a').

5. 2. The feed-through and sealing device (13, 13') according to claim 1, characterized in that the joining sealing part (17, 17') is made from a single material component of elastomeric polymer.

6. 2. The feedthrough and sealing device (13, 13') according to claim 1, characterized in that the joint sealing portion (17, 17') is a dual-material component, which is composed of a soft component including the plate sealing area (17a, 17a') and a hard component located on at least a portion of the terminal pin cover (17b, 17b').

7. 7. A feed-through and sealing device (13, 13') according to claim 6, characterized in that the hard and soft components are joined together by adhesive bonding or vulcanization.

8. 7. The feed-through and sealing device (13, 13') according to claim 6, characterized in that the soft component is made of ethylene propylene diene (monomer) rubber (EPDM).

9. Feed-through and sealing device (13, 13') according to claim 6, characterized in that the rigid components are made of polyamide with glass fibre reinforcement.

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