JP7349955B2 - Airtight terminal, electric compressor, and method for sealing the wiring part of its airtight terminal - Google Patents

Description

The present invention relates to an airtight terminal, and more particularly, to an airtight terminal used in a vehicle-mounted electric compressor.

Airtight terminals are airtight terminals with leads hermetically sealed in eyelets or metal base insertion holes via glass insulating material. It is used when deriving a signal from a source to the outside. For example, as shown in International Publication No. WO 2010/117000 (Patent Document 1), an airtight terminal used in a compressor for a refrigerator or an air conditioner has a top plate portion and extends downward from the outer peripheral edge of the top plate portion. A metal base including a cylindrical part, a flange part extending diagonally outward from the lower end of the cylindrical part, and three small cylindrical parts forming lead sealing holes extending inward from the top plate part. is used. Then, the leads are hermetically sealed to the lead sealing holes of the metal base through the glass insulating material for sealing.

By the way, some hybrid vehicles are configured so that the engine stops when the vehicle temporarily stops at a traffic light, etc., for the original purpose of reducing the impact of the engine on the environment. In such a case, if an engine-driven compressor is used, the air conditioning will stop every time the car stops, which is a particular problem in summer or winter, or in extremely cold or extremely hot regions. Therefore, in hybrid cars and electric cars, the compressor is driven by an electric motor instead of the compressor driven by the engine.In other words, the compressor with a built-in electric motor is built in the compression mechanism and the electric motor in an airtight container, similar to indoor air conditioners. It has been adopted. In consideration of installation in a narrow engine room, it is preferable that these on-vehicle electric compressors be as space-saving, small and lightweight as possible. Since the electric motor is driven through the airtight terminal installed in the terminal mounting hole of the airtight container, the airtight terminal used is also advantageous in terms of space saving, as shown in, for example, Chinese Utility Model Registration No. CN206098769U (Patent Document 2). Many have pins arranged in a straight line like this.

International Publication WO2010/117000 Publication China Utility Model Registration No. CN206098769U

An on-vehicle electric compressor installs an airtight terminal in the terminal mounting hole of a sealed container containing refrigerant, lubricating oil, and an electric motor. Electricity is supplied from the power supply to the electric motor through the airtight terminal to compress and circulate the refrigerant inside and outside the vehicle. It is used for heat exchange. Some vehicle-mounted electric compressors use PAG (polyalkylene glycol)-based synthetic oil as a lubricating oil. PAG-based synthetic oil has low electrical insulation and conductivity, and conventional airtight terminals have a structure that allows refrigerant/oil to enter between the lead members, which is not desirable in terms of electrical insulation. Conventionally, in airtight terminals for on-vehicle electric compressors, silicone rubber insulation coatings are sometimes provided on the outer ring base surface and outer leads on the outside of the sealed container in order to improve electrical insulation, but silicone rubber has poor refrigerant resistance. , it is difficult to apply it to the inside of a closed container as it does not have oil resistance. Further, even if the inner lead of the airtight terminal is coated with rubber, the wiring socket into which the airtight terminal is inserted does not have a watertight structure, so it is impossible to prevent refrigerant/oil from seeping into the socket.

The present invention provides an airtight terminal for an on-vehicle electric compressor in which refrigerant/oil does not come into contact with the electrode surface, a method for sealing the wiring portion of the airtight terminal, and an on-vehicle electric compressor.

According to the present invention, a lead member formed of a conductive material, an outer ring base that holds the lead member, an insulating material that insulates between the lead member and the outer ring base, and at least the outer ring base. An airtight terminal is provided, comprising a cover member fixed to one side of a base, and the cover member has an exposed portion of the lead member and a peripheral wall portion surrounding the exposed portion. The cover member is made of an electrical insulating material having refrigerant resistance and oil resistance, and is arranged inside a closed container housing the electric motor. This cover member may be configured so that a part of the peripheral wall part can be attached and detached as necessary, and is fixed so as to cover at least a part of the outer ring base and the inner lead, and is fixed to the inner side of the peripheral wall part. The inner lead or the electrode connected to the lead is exposed. The peripheral wall provided around the exposed portion of the lead or the exposed portion of the electrode connected to the lead is further filled with an insulating sealing material having refrigerant resistance and oil resistance into the peripheral wall and hardened. It is provided to insulate all the inner current-carrying parts including the connection points of the electric motor's wiring cord connected to the leads. That is, first, the wiring cord of the electric motor is connected to the exposed portion of the airtight terminal, and then the peripheral wall is filled with sealing resin up to the upper end of the inner wall, and this is cured to close the exposed portion along with the connection point of the wiring cord. Once everything is sealed, it is possible to completely block oil, which has poor electrical insulation, from entering the leads, and the current-carrying part of the airtight terminal will not come into contact with the refrigerant/oil.

In the method for sealing the wiring portion of an airtight terminal of the present invention, first, the exposed portion of the airtight terminal is connected to the wiring cord of the electric motor, and then the peripheral wall portion is filled with a sealing resin, and this is cured to seal the wiring cord. All of the exposed parts are sealed together with the connection points. The airtight terminal may have a part or all of the peripheral wall part detachable, so that part or all of the peripheral wall part facing the side surface of the exposed part can be removed, so that the airtight terminal is not obstructed by the peripheral wall part. The wiring cord of the electric motor can be attached to the exposed portion without any trouble, and the work of connecting the wiring cord becomes easy. After the wiring cord connection work is completed, the removed peripheral wall is reattached, and the surrounding wall is filled with a sealing resin using the procedure described above to seal all of the exposed portion and the connecting portion of the wiring cord with the resin.

The on-vehicle electric compressor of the present invention includes a compression mechanism, an electric motor that drives the compression mechanism, an inverter that drives the electric motor, an airtight container that houses the electric motor and the compression mechanism, and an airtight container connected to the airtight container. An electric compressor having an inverter housing for accommodating the inverter, and an airtight terminal provided in the airtight container for electrically connecting the inverter and the electric motor,
The airtight terminal includes a lead member formed of a conductive material, an outer ring base that holds the lead member, an insulating material that insulates between the lead member and the outer ring base, and at least the outer ring base. and a cover member fixed to one side of the lead member, and the cover member has an exposed portion of the lead member and a peripheral wall portion surrounding the exposed portion. The cover member is made of an electrical insulating material having refrigerant resistance and oil resistance, and is arranged inside a closed container housing the electric motor.

Among the inventions of the present disclosure, the effects obtained by typical ones are briefly explained as follows. According to an embodiment of the present disclosure, the electrical insulation of the airtight terminal can be improved.

Showing the airtight terminal 10 according to the present invention, (a) is a plan view of the inner side, (b) is a partial front cross-sectional view taken along line DD in (a), and (c) is a lower surface of the outer side. (d) shows a side view. The airtight terminal 20 according to the present invention is shown, in which (a) is a plan view of the inner side, (b) is a partial front cross-sectional view taken along line DD in (a), and (c) is a lower surface of the outer side. (d) shows a side view. In addition, in the inner side plan view of (a), the lead member 21 hidden in the cover member 24 is seen through with a thin line. A process flow diagram of a method 30 for sealing the wiring portion of an airtight terminal according to the present invention is shown. 1 shows a cross-sectional view of a vehicle-mounted electric compressor 40 according to the present invention. Showing the installed state of the airtight terminal 50 according to the present invention, (a) is a partial plan view seen from the inner side of the airtight container of the electric motor, and (b) is a cut along the line DD in (a). A partial cross-sectional view is shown. In the partial plan view of the inner side in (a), the lead member 51 hidden by the cover member 54 and the electrode portion 512 of the connector connected to the lead member 51 are shown through thin lines.

The airtight terminal according to the present invention includes at least a lead member formed of a conductive material, an outer ring base that holds the lead member, and an insulating material that insulates between the lead member and the outer ring base. A cover member fixed to one side of the outer ring base is provided, and the cover member has an exposed portion of the lead member and a peripheral wall portion surrounding the exposed portion. The cover member is made of an electrical insulating material having refrigerant resistance and oil resistance, and the peripheral wall portion may be partially or completely removable as required. The cover member is arranged inside a closed container housing the electric motor. This cover member is fixed so as to cover at least a portion of the outer ring base and the inner lead, and is attached to the inside of the peripheral wall portion so as to expose the inner lead or the electrode connected to the lead. It is being The peripheral wall provided around the exposed portion of the lead or the exposed portion of the electrode connected to the lead is further filled with an insulating sealing material having refrigerant resistance and oil resistance into the peripheral wall and hardened. It is provided to insulate all the inner current-carrying parts including the connection points of the electric motor's wiring cord connected to the leads. That is, first, the wiring cord of the electric motor is connected to the exposed portion of the airtight terminal, and then the peripheral wall is filled with sealing resin up to the upper end of the inner wall, and this is cured to close the exposed portion along with the connection point of the wiring cord. Once everything is sealed, it is possible to completely block oil, which has poor electrical insulation, from entering the leads, and the current-carrying part of the airtight terminal will not come into contact with the refrigerant/oil.

The method for sealing the wiring portion of an airtight terminal of the present invention is such that the inner lead exposed portion provided inside the peripheral wall portion or the exposed portion of the lead member including the electrode plate connected thereto is connected to the inner lead exposed portion of the in-vehicle electric compressor. This method connects the wiring cord of the electric motor that drives the compression mechanism.

That is, in the method for sealing the wiring portion of an airtight terminal of the present invention, first, the wiring cord of the electric motor is connected to the exposed portion of the lead or lead member surrounded by the peripheral wall portion of the airtight terminal, and then the wiring cord is sealed inside the peripheral wall portion. A sealing resin is filled and cured to encapsulate the exposed portion including the connection points of the wiring cord in the sealing resin. The airtight terminal may be configured such that a part or all of the peripheral wall portion can be attached and detached, so that a part of the peripheral wall portion facing the side surface of the exposed metal portion can be removed, so that the airtight terminal is not obstructed by the peripheral wall portion. The wiring cord of the electric motor can be attached to the exposed metal portion without touching the exposed metal portion, and the work of connecting the wiring cord becomes easy. After the wiring cord connection work is completed, the removed peripheral wall is reattached, and the surrounding wall is filled with a sealing resin using the procedure described above to seal all of the exposed metal parts and the connecting portions of the wiring cord with the resin.

The on-vehicle electric compressor of the present invention includes a compression mechanism, an electric motor that drives the compression mechanism, an inverter that drives the electric motor, an airtight container that houses the electric motor and the compression mechanism, and an airtight container connected to the airtight container. An electric compressor having an inverter housing for accommodating the inverter, and an airtight terminal provided in the airtight container for electrically connecting the inverter and the electric motor,
The airtight terminal includes a lead member formed of a conductive material, an outer ring base that holds the lead member, an insulating material that insulates between the lead member and the outer ring base, and at least the outer ring base. a cover member fixed to one side of the lead member, and the cover member includes an exposed portion of the lead member, a peripheral wall portion surrounding the exposed portion, and a wiring cord of the electric motor connected to the exposed portion. The inside of the peripheral wall portion is filled with a sealing resin, and the exposed portion is sealed in the sealing resin together with the connection point of the wiring cord.

As shown in FIG. 1, the airtight terminal 10 of the present invention includes a lead member 11 formed of a conductive material, an outer ring base 12 that holds the lead member 11, and a space between the lead member 11 and the outer ring base 12. and a cover member 14a fixed to one side of the outer ring base 12 with a curable resin.The cover member 14a surrounds at least the exposed portion 15 of the lead member 11 and the exposed portion 15. It has a peripheral wall portion 14b. The cover member 14 is made of an electrical insulating material having refrigerant resistance and oil resistance, and a portion of the peripheral wall portion 14b may be detachable as required. The cover member 14 is then placed inside the closed container containing the electric motor. The cover member 14 is fixed so as to cover at least a portion of the outer ring base 12 and the inner lead member 11, and is attached to the inner side of the peripheral wall portion 14b so as to expose the inner lead member 11. . The lead member 11 may have an electrode plate (not shown). The cover member 14a is provided such that the surrounding wall portion 14b surrounds the exposed portion 15 of the lead member 11 or the exposed portion of the electrode plate connected to the lead member 11. The cover member 14a is provided to insulate and insulate all the electrically conductive parts on the inner side, including the connection points of the wiring cord or connector of the electric motor electrically connected to the lead member 11. That is, after connecting the wiring part of the electric motor to the lead member 11, an insulating sealing material having refrigerant resistance and oil resistance is filled into the peripheral wall part 14b and cured, thereby electrically connecting to the lead member 11. Insulate all electrically conductive parts on the inner side, including the electric motor's wiring cord or connector connection points.

As shown in FIG. 2, the airtight terminal 20 of the present invention includes a lead member 21 including an electrode plate 21a and a lead 21b made of a conductive material, an outer ring base 22 holding the lead member 21, and a lead member 21 and an outer ring. The cover member 24 includes an insulating material 23 that insulates between the base 22 and the outer ring base 22, and a cover member 24 fixed to one side of the outer ring base 22 with a curable resin. It has peripheral wall parts 24b and 24d surrounding the periphery of 25. The cover member 24 consisting of 24a, 24b, 24c, 24b, and 24d in FIG. 2 is made of an electrical insulating material having refrigerant resistance and oil resistance, and the surrounding wall portions 24b and 24d can be attached and detached as necessary. You can do it like this. The cover member 24 is then placed inside the closed container containing the electric motor. The cover member 24 is fixed so as to cover the outer ring base 22 and the inner lead member 21 excluding the exposed portion 25, and the inner lead 21b or the lead is attached to the inner side surrounded by the peripheral wall portions 24b and 24d. It is attached so that the electrode plate 21a connected to the electrode plate 21b is exposed. The peripheral wall portions 24b and 24d provided around the exposed portion of the lead 21b or the exposed portion 25 of the electrode plate 21a connected to the lead 21b are provided with an insulating seal having refrigerant resistance and oil resistance in the peripheral wall portions 24b and 24d. It is provided to insulate all the electrically conductive parts on the inner side, including the wiring cord of the electric motor electrically connected to the lead member 21 or the connection point of the connector, by filling and curing the stopper material.

A method 30 for sealing the wiring portion of an airtight terminal according to the present invention connects the lead member of the airtight terminal according to the present invention to the wiring cord or connector of the electric motor of an on-vehicle electric compressor, and then connects the entire lead member including the connection point. This is a method of insulating and sealing the periphery, and as shown in the process flow diagram of FIG. 3, first, an electrical connection is made in which the electrode part of the electric motor is connected to the exposed part of the lead or lead member surrounded by the peripheral wall part of the airtight terminal. The process includes a step 31, a resin filling step 32 for filling the peripheral wall with a sealing resin, and a resin curing step 33 for curing the sealing resin. Thereafter, each part of the motor, such as the stator and rotor, including the airtight terminals, is assembled into an electric compressor in a motor assembly process 34. By wiring covering method 30, the inner conductive part (exposed metal part, etc.) of the airtight terminal arranged inside the airtight container of the electric motor is completely enclosed in sealing resin along with the wiring cord or the connection point of the connector. do. The airtight terminal may have a part of the peripheral wall part that can be attached and detached, so that the part of the peripheral wall facing the side surface of the exposed metal part can be removed without being obstructed by the peripheral wall part. Wiring work to the electric motor to the exposed metal portion becomes easier. After the connection work to the wiring cord or connector is completed in this way, reinstall the removed peripheral wall, fill the inside of the peripheral wall with sealing resin using the above procedure, and close the exposed metal parts and the connection part of the electric motor's wiring cord or connector. All sealed with resin.

As an example of an on-vehicle electric compressor, an overview of a scroll type electric compressor will be described with reference to FIG. 4. The on-vehicle electric compressor 40 has an airtight container in which a front airtight container 41 and a rear airtight container 42 are fixed together with bolts or the like to maintain airtightness. The closed containers 41 and 42 are usually made of a metallic material such as aluminum or aluminum alloy. The closed container 42 has a refrigerant and oil inlet 43, and the closed container 41 has a discharge port 44. The suction port 43 and the discharge port 44 are each connected to an external refrigerant/circulation circuit (not shown).

A scroll-type compression mechanism 45 and an electric motor 46 that drives the compression mechanism 45 are housed inside the closed containers 41 and 42 . The electric motor 46 includes a rotating shaft 47 rotatably held in the sealed container 42 via a bearing, a rotor 48 fixed to the rotating shaft 47, and an electric motor 46 arranged around the outer periphery of the rotor 48 and fixed to the inner wall of the sealed container 42. The stator 49 is composed of a stator 49 and a stator. The rotor 48 has a plurality of permanent magnets 401, and the stator 49 has a coil 402 wound in three phases.

The compression mechanism 45 mainly includes a fixed scroll 403 fixed to the inner wall of the closed containers 41 and 42, and a movable scroll 404 disposed opposite the fixed scroll 403. A variable volume compression chamber 405 for compressing refrigerant is provided between the fixed scroll 403 and the movable scroll 404. The movable scroll 404 is connected to an eccentric pin 407 of a rotating shaft 47 via a bearing and an eccentric bushing 406, and is oscillated according to the rotation of the rotating shaft 47, changing the volume of a compression chamber 405 and compressing the refrigerant. It is configured so that it can be done.

On the other hand, an inverter housing 409 that accommodates an inverter device 408 is provided on a part of the outer peripheral wall of the closed container 42 . Inside the inverter housing 409, an inverter device 408 serving as an external power source and an airtight terminal 410 are attached to an insertion hole of the closed container 42. The airtight terminal 410 is electrically connected to the inverter device 408 within the inverter housing 409 via an inverter-side connector 411, and is connected to a connection portion formed by the wiring cord or connector of the electric motor 46 inside 42a of the airtight container 42. It is electrically connected to the coil 402 of the stator 49 via the coil 412 . That is, when the coil 402 of the electric motor 46 is energized from the inverter device 408 via the airtight terminal 410, the rotor 48 is rotated, and the compression mechanism 45 is operated by the rotating shaft 47.

As shown in FIG. 4, the on-vehicle electric compressor 40 of the present invention includes a compression mechanism 45, an electric motor 46 that drives the compression mechanism 45, an inverter device 408 that drives the electric motor 46, an electric motor 46, and a compressor. An airtight container 41, 42 that houses the mechanism 45, an inverter housing 409 that is joined to the airtight container and houses the inverter device 408, and an inverter housing 409 that is provided in the airtight container to electrically connect the inverter device 408 and the electric motor 46. In an electric compressor having an airtight terminal 410,
As shown in FIG. 1 or 2, the airtight terminal 410 includes at least a lead member 11 or 21 made of a conductive material, an outer ring base 12 or 22 that holds the lead member 11 or 21, and a lead member. An insulating material 13 or 23 that insulates between 11 or 21 and the outer ring base 12 or 22, and a cover member 14 or 24 fixed to one side of the outer ring base 12 or 22. From the exposed portion 15 or 25 of the lead member 11 or 21, the peripheral wall portion 14b or 24b, 24d surrounding the exposed portion 15 or 25, and the wiring cord or connector of the electric motor 46 connected to the exposed portion 15 or 25. The inside of the peripheral wall is filled with a refrigerant-resistant and oil-resistant sealing resin, and the exposed portion 15 or 25 is sealed in the sealing resin along with the connection points of the connecting portion 412. Thus, an on-vehicle electric compressor coated to prevent contact with refrigerant and lubricant is provided.

As shown in FIG. 5, the airtight terminal 50 according to the present invention has a lead of the airtight terminal 50 connected to a connection portion 512 consisting of a wiring cord of an electric motor or a molded connector housed inside a hermetic container 502 to which the airtight terminal 50 is attached. After the member 51 is electrically connected, the inside of the peripheral wall portion 54 is filled with a refrigerant-resistant and oil-resistant sealing resin 54c, and the current-carrying portion is encapsulated in the sealing resin together with the connection point of the connecting portion 412, and then hardened. By doing so, it is coated so as not to come into contact with the refrigerant and lubricating oil, is inserted into the insertion hole 510 of the closed container 502, and is fastened with the spiral 500 or the like.

As shown in FIG. 1, the airtight terminal 10 of Example 1 according to the present invention includes a lead member 11 made of an Fe-Cr alloy, an outer ring base 12 made of iron that holds the lead member 11, and a lead member 11 and an outer ring. The cover member 14a includes an insulating material 13 made of soda barium glass that insulates between it and the base 12, and a cover member 14a made of insulating plastic fixed to one side of the outer ring base 12 with an epoxy resin, which is a thermosetting resin. It has an exposed portion 15 of the lead member 11 and a peripheral wall portion 14b surrounding the exposed portion 15 in a square shape. The cover member 14a is made of an electrically insulating plastic material having refrigerant resistance and oil resistance. The cover member 14a is then placed inside the closed container housing the electric motor. The cover member 14a is fixed so as to pass through the inner lead member 11 and cover a part of the outer ring base 12, and is attached to the inner side of the peripheral wall portion 14b so as to expose the inner lead member 11. ing. The cover member 14a is provided to insulate all the inner current-carrying metal portions including the wiring cord of the electric motor electrically connected to the lead member 11 or the connection point of the connector. The outer ring base 12 has a through hole 100 for fastening.

As shown in FIG. 2, the airtight terminal 20 of Example 2 according to the present invention includes three lead members 21, each consisting of a Fe-Cr alloy lead 21b and an electrode plate 21a connected to one side of the lead 21b. An iron outer ring base 22 that penetrates and holds the lead 21b, an insulating material 23 made of soda barium glass that insulates between the lead 21b and the outer ring base 22, and a lead 21b and the insulating material provided on the outer ring base 22. 23, the inner space between the outer ring base 22 and the outer ring base 22 is filled with a curable resin 24c, and the cover member 24 is made of plastic. It has peripheral wall portions 24b and 24d surrounding the periphery in a square shape. The peripheral wall portion 24d can be removed from the peripheral wall portion 24b in a sliding manner. Thereby, in the electrical connection process, the peripheral wall portion 24b can be connected to the lead member 21 with the peripheral wall portion 24d removed, and the work is facilitated because the peripheral wall portion 24d does not interfere. The peripheral wall portions 24b and 24d provided around the exposed portion 25 of the electrode plate 21a connected to the lead 21b are further filled with an insulating sealing material having refrigerant resistance and oil resistance and hardened. By doing so, it is provided to insulate and insulate all the current-carrying parts on the inner side, including the connection points of the wiring cord or connector of the electric motor electrically connected to the lead member 21. The outer ring base 22 has a through hole 200 for fastening.

As shown in FIG. 3, a method 30 for sealing the wiring portion of an airtight terminal according to Embodiment 3 of the present invention is as follows. It consists of an electrical connection step 31 for connecting electrical connection parts such as wiring cords or bus bars, a resin filling step 32 for filling the inside of the box with epoxy sealing resin, and a resin curing step 33 for curing the epoxy sealing resin; In a motor assembly step 34, each part of the motor such as the stator including the airtight terminal is assembled into an electric motor that drives an on-vehicle electric compressor.

As shown in FIG. 4, an on-vehicle electric compressor 40 according to a fourth embodiment of the present invention includes a compression mechanism 45, an electric motor 46 that drives the compression mechanism 45, an inverter device 408 that drives the electric motor 46, and an electric Sealed containers 41 and 42 that house the motor 46 and compression mechanism 45; an inverter housing 409 that is joined to the sealed container and houses the inverter device 408; In an electric compressor having an airtight terminal 410 for connecting to
As shown in FIG. 2, the airtight terminal 410 includes at least a lead member 21 made of a conductive material, an outer ring base 22 that holds the lead member 21, and a space between the lead member 21 and the outer ring base 22. and a cover member 24 fixed to one side of the outer ring base 22. The cover member 24 includes an exposed portion 25 of the lead member 21 and a peripheral wall surrounding the exposed portion 25 in a square shape. portions 24b, 24d, and a connecting portion 412 consisting of a molded connector of the electric motor 46 connected to the exposed portion 25, and the inside of the peripheral wall portions 24b, 24d is filled with a refrigerant-resistant and oil-resistant sealing resin. An on-vehicle electric compressor is provided in which the exposed portion 25 and the connection point of the connection portion 412 are encapsulated in a sealing resin to prevent contact with the refrigerant and lubricant.

As shown in FIG. 5, the area around the insertion part of the airtight terminal 410 of Example 4 is connected after the lead member is electrically connected to the molded connector 511 of the electric motor housed inside the airtight container 502 to which the airtight terminal 410 is attached. The inside of the square-shaped peripheral wall portion 54 is filled with a refrigerant-resistant and oil-resistant sealing resin 54c, and the current-carrying portion is encapsulated and hardened in the sealing resin along with the connection points of the connection portion 512, so that the refrigerant is not absorbed. It is coated so as not to come into contact with lubricating oil, is inserted into the insertion hole 510 of the closed container 502, and is fastened with a spiral 500.

The lead member of the airtight terminal according to the present invention can be coated with a desired plating on its surface. Further, the lead member and the outer ring base may be made of any metal material that can be used for airtight terminals, such as not only Fe-Cr alloy but also Fe-Ni alloy, carbon steel, copper alloy, It may be changed to an aluminum alloy or the like. Similarly, the insulating material described in the examples is sufficient as long as it can electrically insulate and hermetically seal the lead and the metal base, and any glass material, resin sealing material, or ceramic material can be used, not just the soda barium glass in the example. I can do it. For example, if necessary, part of the insulating material may be made of different glass materials, or if necessary, part or all of the glass material may be replaced with a resin material such as epoxy resin. good.

INDUSTRIAL APPLICABILITY The present invention can be used for airtight terminals, and particularly for airtight terminals for vehicles.

Airtight terminal 10, lead member 11, outer ring base 12, lead member 11, insulating material 13, cover member 14a, peripheral wall portion 14b, exposed portion 15, through hole 100, airtight terminal 20, lead member 21, electrode plate 21a, lead 21b, outer ring base 22, insulating material 23, cover member 24, peripheral wall parts 24b, 24d, curable resin 24c, exposed part 25, through hole 200, wiring part sealing method 30, electrical connection process 31, resin filling process 32 , resin curing process 33, motor assembly process 34, on-vehicle electric compressor 40, sealed containers 41, 42, inside 42a of the sealed container, suction port 43, discharge port 44, compression mechanism 45, electric motor 46, rotating shaft 47, rotation child 48, stator 49, permanent magnet 401, coil 402, fixed scroll 403, movable scroll 404, compression chamber 405, eccentric bush 406, eccentric pin 407, inverter device 408, inverter housing 409, airtight terminal 410, connector 411, connection portion 412, lead member 51, peripheral wall portion 54, sealing resin 54c, spiral 500, airtight container 502, insertion hole 510, connector 511, connection portion 512.

Claims (14)

a plurality of lead members formed of a conductive material; an outer ring base holding the plurality of lead members;
an insulating material that insulates between each of the lead members and the outer ring base ;
a cover member fixed to at least one side of the outer ring base ;
The cover member surrounds the exposed portions of the plurality of lead members and has a peripheral wall portion whose inner peripheral wall surface faces the side peripheral surface of the exposed portion of each lead member. terminal. The hermetic terminal according to claim 1, wherein the cover member is made of an electrical insulating material having refrigerant resistance and oil resistance. 3. The hermetic terminal according to claim 1, wherein the cover member is fixed to at least one side of the outer ring base with a curable resin. The hermetic terminal according to any one of claims 1 to 3, wherein the cover member has a peripheral wall portion surrounding the exposed portion in a square shape. The hermetic terminal according to any one of claims 1 to 3, wherein the peripheral wall portion of the cover member is removable. In this method, the lead member of the airtight terminal is connected to the wiring cord or connector of the electric motor of the on-vehicle electric compressor, and the entire circumference of the lead member including the connection point is insulated and sealed. An electrical connection step of connecting an electrode portion of the electric motor to the exposed portion of the enclosed lead member on the electric motor side , and then filling the peripheral wall portion with a sealing resin and connecting the exposed portion of the electric motor side of the surrounding wall portion to the connecting portion of the lead member. A method for sealing a wiring portion of an airtight terminal, comprising a resin filling step of encapsulating each connection point in a sealing resin, and a resin curing step of curing the sealing resin. 7. The method for sealing a wiring portion of an airtight terminal according to claim 6, wherein after the resin curing step, each part of the motor including the airtight terminal is assembled into an electric compressor in a motor assembly step. In the electrical connection step, the airtight terminal is configured such that part or all of the peripheral wall portion can be attached and detached, so that wiring work to the electric motor can be easily performed on the exposed metal portion without being obstructed by the peripheral wall portion. After the connection work to the wiring cord or connector is completed, the removed peripheral wall is reinstalled, and in the resin filling step, the peripheral wall is filled with sealing resin to seal the exposed metal parts and the electric motor's wiring cord or connector. 8. The method for sealing a wiring portion of an airtight terminal according to claim 6 or 7, wherein all the connecting portions are sealed with resin. A compression mechanism, an electric motor that drives the compression mechanism, an inverter device that drives the electric motor, an airtight container that houses the electric motor and the compression mechanism, and an airtight container that is joined to the airtight container and houses the inverter device. An electric compressor having an inverter housing and an airtight terminal provided in the airtight container for electrically connecting the inverter device and the electric motor,
The airtight terminal includes a lead member formed of a conductive material, an outer ring base that holds the lead member, an insulating material that insulates between the lead member and the outer ring base, and an outer ring base that is insulated between the lead member and the outer ring base. a cover member fixed to a surface on the electric motor side , the cover member being connected to an exposed portion of the lead member on the electric motor side , a peripheral wall surrounding the exposed portion, and the exposed portion; The interior of the peripheral wall is filled with a sealing resin, and the exposed portion is filled with the sealing resin along with the connection points of the connection. Enclosed electric compressor. The electric compressor according to claim 9, wherein the cover member is made of an electrical insulating material having refrigerant resistance and oil resistance. The electric compressor according to claim 9 or 10, wherein the cover member is fixed to at least one side of the outer ring base with a curable resin. The electric compressor according to any one of claims 9 to 11, wherein the cover member has a peripheral wall portion surrounding the exposed portion in a square shape. The electric compressor according to any one of claims 9 to 12, wherein the peripheral wall portion of the cover member is configured to be detachable. a lead member formed of a conductive material;
an outer ring base that holds the lead member;
an insulating material that insulates between the lead member and the outer ring base;
a cover member fixed to at least one side of the outer ring base;
The cover member has an exposed portion of the lead member and a peripheral wall portion surrounding the exposed portion,
The peripheral wall portion of the cover member is an airtight terminal that is removable.

Images