Airtight terminal, electric compressor using the airtight terminal, and connection method

Abstract

A hermetic terminal (10) includes: a lead member (11) formed of a conductive material; an outer ring base (12) that holds the lead member (11); an insulating material (13) that is disposed between the lead member (11) and the outer ring base (12) and insulates the lead member (11) and the outer ring base (12); and a cover member (14a) that is fixed to at least one side of the outer ring base (12). The end of the lead member (11) has an exposed portion (15) that is exposed from the insulating material (13). The cover member (14a) has a peripheral wall portion (14b) that surrounds the exposed portion (15) of the lead member (11).

Description

Technical Field

[0001] The present disclosure relates to an airtight terminal, an electric compressor using the same, and a connection method. More specifically, the present disclosure relates to an airtight terminal for vehicle use, an electric compressor using the same, and a connection method. Background Art

[0002] The hermetic terminal is a terminal in which the lead wire is hermetically sealed in the insertion hole of the metal outer ring base (eyelet) through a glass insulating material. The hermetic terminal is used to supply current to an electrical device or component housed in an airtight container, or to extract a signal from the electrical device or component to the outside.

[0003] For example, International Publication No. WO2010 / 117000 (Patent Document 1) shows an airtight terminal used in a compressor of a refrigerator or air conditioner. The outer ring base of the airtight terminal includes: a top plate; a cylindrical portion extending downward from the outer peripheral end of the top plate; a flange portion extending obliquely outward from the lower end of the cylindrical portion; and three small cylindrical portions forming lead sealing holes extending from the top plate toward the inside. In each of the lead sealing holes of the outer ring base, the lead is sealed airtightly by a sealing glass insulating material.

[0004] In a hybrid vehicle, in order to reduce the impact of the engine on the environment, the engine is stopped when the vehicle stops temporarily at a traffic light, etc. In this case, if a compressor driven by the engine is used, the air conditioner stops every time the vehicle stops, which becomes a problem in summer or winter, especially in hot summer or cold winter.

[0005] In hybrid vehicles and electric vehicles, a compressor driven by an electric motor rather than an engine is used. Similar to a compressor for indoor air conditioners, a compressor is used in which a compression mechanism and an electric motor are built in an airtight container.

[0006] Considering that an electric compressor for vehicle use is installed in a narrow engine compartment, it is preferred to be as space-saving and small and lightweight as possible. The electric motor is driven by electricity supplied by an airtight terminal installed in a terminal mounting hole of an airtight container. For example, as shown in Chinese utility model registration No. CN206098769U (patent document 2), the airtight terminals for vehicle-mounted electric compressors are mostly configured with pins in a linear arrangement that is conducive to saving space.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: International Publication No. WO2010 / 117000

[0010] Patent Document 2: China Utility Model Registration No. CN206098769U Summary of the invention

[0011] Technical problem to be solved by the invention

[0012] In an electric compressor for use in a vehicle, an airtight terminal is installed in the terminal mounting hole of a sealed container that contains refrigerant, lubricant, and motor. Electricity is supplied from a power source to the motor through the airtight terminal, so that the refrigerant is compressed and circulated, and is used for heat exchange between the inside and outside of the vehicle. There are electric compressors for use in vehicles that use PAG (polyalkylene glycol) synthetic oil as lubricant. PAG synthetic oil has low electrical insulation and has electrical conductivity. Conventional airtight terminals have a structure that allows oil to intrude between lead members, and therefore are not preferred in terms of electrical insulation.

[0013] In the conventional airtight terminals of vehicle-mounted electric compressors, in order to improve electrical insulation, an insulating covering made of silicone rubber is sometimes provided on the outer ring base surface and the outer lead outside the sealed container. However, silicone rubber does not have refrigerant resistance and oil resistance, and is difficult to be applied inside the sealed container. In addition, even if the inner lead of the airtight terminal is covered with rubber, since the wiring socket into which the airtight terminal is inserted is not a watertight structure, it is not possible to prevent oil from infiltrating into the socket.

[0014] The present invention provides an airtight terminal for an in-vehicle electric compressor in which oil does not come into contact with an electrode surface, an electric compressor using the airtight terminal, and a wiring method.

[0015] Technical solutions adopted to solve technical problems

[0016] The airtight terminal disclosed in the present invention includes: a lead member, the lead member is formed of a conductive material; an outer ring base, the outer ring base holds the lead member; an insulating material, the insulating material is arranged between the lead member and the outer ring base, and insulates the lead member from the outer ring base; and a cover member, the cover member is fixed to at least one side of the outer ring base. The end of the lead member has an exposed portion exposed from the insulating material. The cover member has a peripheral wall portion surrounding the exposed portion of the lead member.

[0017] In the above-mentioned airtight terminal, the above-mentioned cover member may be formed of an electrically insulating material having refrigerant resistance and oil resistance.

[0018] In the above-mentioned airtight terminal, the above-mentioned cover member may be fixed to the above-mentioned outer ring base by a curable resin.

[0019] In the above-mentioned airtight terminal, the surrounding wall portion of the cover member may surround the periphery of the exposed portion in a rectangular shape.

[0020] In the above-mentioned airtight terminal, all or part of the above-mentioned peripheral wall portion of the above-mentioned cover member may be detachable.

[0021] The electric compressor disclosed in the present invention includes: the above-mentioned airtight terminal; a compression mechanism; a motor, the above-mentioned motor drives the above-mentioned compression mechanism; an electric wire, the above-mentioned electric wire connects the above-mentioned motor and the above-mentioned airtight terminal; an inverter device, the above-mentioned inverter device drives the above-mentioned motor; a sealed container, the above-mentioned sealed container accommodates the above-mentioned motor and the above-mentioned compression mechanism; an inverter housing, the above-mentioned inverter housing is connected to the above-mentioned sealed container and accommodates the above-mentioned inverter device; a connecting part, the above-mentioned connecting part electrically connects the above-mentioned electric wire to the above-mentioned exposed part; and a sealing resin, the above-mentioned sealing resin is filled in the inside of the above-mentioned peripheral wall part. The above-mentioned exposed part and the above-mentioned connecting part are sealed in the above-mentioned sealing resin.

[0022] In the electric compressor, the connection portion may include a connector provided at an end portion of the electric wire and connecting the electric wire to the exposed portion of the lead member.

[0023] The connection method disclosed in the present invention is a connection method for connecting the above-mentioned airtight terminal and the electric wire of the electric compressor, wherein the above-mentioned electric compressor includes: a compression mechanism; a motor, the above-mentioned motor drives the above-mentioned compression mechanism; the above-mentioned electric wire connecting the above-mentioned motor and the above-mentioned airtight terminal; an inverter device, the above-mentioned inverter device drives the above-mentioned motor; and a sealed container, the above-mentioned sealed container accommodates the above-mentioned motor and the above-mentioned compression mechanism; an inverter housing, the above-mentioned inverter housing is connected to the above-mentioned sealed container and accommodates the above-mentioned inverter device; and a connecting part, the above-mentioned connecting part electrically connects the above-mentioned electric wire to the above-mentioned exposed part. The above-mentioned connection method includes: a process of connecting the above-mentioned electric wire of the above-mentioned motor to the above-mentioned exposed part of the above-mentioned lead member surrounded by the above-mentioned peripheral wall part of the above-mentioned airtight terminal through the above-mentioned connecting part; a process of filling the above-mentioned peripheral wall part with a sealing resin and sealing the above-mentioned exposed part and the above-mentioned connecting part in the above-mentioned sealing resin; and a process of curing the above-mentioned sealing resin.

[0024] The connection method may further include a step of assembling components constituting the motor after the step of curing the sealing resin.

[0025] In the above-mentioned connection method, part or all of the above-mentioned peripheral wall portion is constructed to be detachable, and after the process of connecting through the above-mentioned connecting portion, it also includes a process of installing part or all of the removed peripheral wall portion, and the process of filling the above-mentioned sealing resin can also be performed after the process of installing part or all of the above-mentioned peripheral wall portion.

[0026] Effects of the Invention

[0027] According to the present disclosure, it is possible to provide an airtight terminal for an in-vehicle electric compressor in which oil does not come into contact with an electrode surface, an electric compressor using the airtight terminal, and a wiring method. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The airtight terminal of the present invention is shown, (a) is a top view showing the inner side, (b) is a front partial sectional view of the airtight terminal cut along the Ib-Ib line of (a), (c) is a bottom view showing the outer side, and (d) is a side view.

[0029] Figure 2 The hermetic terminal of the present disclosure is shown, (a) is a top view showing the inner side, (b) is a front partial cross-sectional view cut along the IIb-IIb line of (a), (c) is a bottom view showing the outer side, and (d) is a side view.

[0030] Figure 3 1 is a flowchart showing a connection process of the hermetic terminal of the present disclosure.

[0031] Figure 4 is a cross-sectional view of the electric compressor of the present disclosure.

[0032] Figure 5 The attached state of the airtight terminal of the present disclosure is shown, (a) is a plan view viewed from the back side of the sealed container of the electric compressor, and (b) is a partial cross-sectional view cut along the VV line of (a). DETAILED DESCRIPTION

[0033] The airtight terminal of this embodiment includes: a lead member, the lead member is formed of a conductive material; an outer ring base, the outer ring base holds the lead member; an insulating material, the insulating material is arranged between the lead member and the outer ring base, and insulates the lead member from the outer ring base; and a cover member, the cover member is fixed to a single surface of the outer ring base. The end of the lead member has an exposed portion protruding from the insulating material. The cover member has a peripheral wall portion surrounding the exposed portion of the lead member.

[0034] The cover member may also be made of an electrically insulating material having refrigerant resistance and oil resistance. The peripheral wall portion of the cover member may also be partially or entirely removable as required. When the airtight terminal is used for an electric compressor, the cover member is disposed inside a sealed container that accommodates the motor.

[0035] The cover member is fixedly connected in a manner that covers at least one surface of the outer ring base and a part of the inner side of the lead member. The inner side of the lead member or the electrode connected to the lead member is exposed on the inner side of the peripheral wall. An insulating sealing material having refrigerant resistance and oil resistance is filled in the peripheral wall around the exposed part of the lead member or the electrode connected to the lead member and solidified. In this way, all the inner side current-carrying parts including the connection part of the electric wire of the motor connected to the lead member are insulated and covered.

[0036] In the case of insulation covering, first, the electric wire of the motor is electrically connected to the exposed part of the airtight terminal. Then, the sealing resin is filled in the peripheral wall portion up to the upper end of the peripheral wall portion and solidified. In this way, the connection part of the electric wire and the exposed part of the lead member can be completely insulated and covered. By covering with the sealing resin, the intrusion of oil with low electrical insulation into the lead member can be completely cut off, and the energized part of the airtight terminal does not contact the oil.

[0037] The airtight terminal connection method of this embodiment is a method of connecting the electric wire of the motor driving the compression mechanism of the vehicle-mounted electric compressor to the exposed part of the lead member provided on the inner side of the peripheral wall part or the exposed part of the lead member including the electrode plate etc. connected thereto.

[0038] That is, in the connection method of this embodiment, first, the electric wire of the motor is connected to the exposed portion of the lead member surrounded by the peripheral wall portion of the airtight terminal. Then, the interior of the peripheral wall portion is filled with a sealing resin and cured. Thus, the exposed portion and the connection portion of the electric wire are completely sealed in the sealing resin.

[0039] The airtight terminal may also be configured so that part or all of the peripheral wall portion can be installed and removed. By being able to remove a part of the peripheral wall portion opposite to the side of the exposed portion, the electric wires of the motor can be installed relative to the exposed portion without being hindered by the peripheral wall portion, and the connection operation of the electric wires becomes easy. After the connection operation of the electric wires is completed, the removed peripheral wall portion is installed again. The sealing resin is filled in the peripheral wall portion in the same order as above, and the exposed portion and the connection portion of the electric wire are all sealed with resin.

[0040] The vehicle-mounted electric compressor of this embodiment includes: a compression mechanism; an electric motor, which drives the compression mechanism; an inverter, which drives the electric motor; a sealed container, which accommodates the electric motor and the compression mechanism; an inverter housing, which is coupled to the sealed container and accommodates the inverter; and an airtight terminal, which is provided in the sealed container and is used to electrically connect the inverter to the electric motor.

[0041] The airtight terminal includes: a lead member, the lead member is formed of a conductive material; an outer ring base, the outer ring base holds the lead member; an insulating material, the insulating material insulates the lead member from the outer ring base; and a cover member, the cover member is fixed to at least one surface of the outer ring base. The cover member has a peripheral wall portion surrounding the exposed portion of the lead member. The electric wire of the motor is connected to the exposed portion through a connecting portion. The interior of the peripheral wall portion is filled with a sealing resin, and the connecting portion between the exposed portion and the electric wire is sealed in the sealing resin.

[0042] like Figure 1 As shown, the airtight terminal 10 of the embodiment includes: a lead member 11, the lead member 11 is formed of a conductive material; an outer ring base 12, the outer ring base 12 holds the lead member 11; an insulating material 13, the insulating material 13 is provided between the lead member 11 and the outer ring base 12, and insulates them; and a cover member 14a, the cover member 14a is fixed to one side of the outer ring base 12 with a curable resin. The cover member 14a has a peripheral wall portion 14b surrounding the periphery of the exposed portion 15.

[0043] The cover member 14 is made of an electrically insulating material having refrigerant resistance and oil resistance. A portion of the peripheral wall portion 14b can also be detachable as required. When used in an electric compressor, the cover member 14 is arranged inside a sealed container that accommodates the motor. The cover member 14 covers at least one surface of the outer ring base 12 and a portion of the lead member 11 on the inner side.

[0044] The inner side of the lead member 11 is exposed inside the peripheral wall portion 14b. The lead member 11 may also have an electrode plate (not shown). The cover member 14a is provided so that the peripheral 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.

[0045] The cover member 14a is provided to insulate and cover all the inner conductive parts including the connection part of the electric wire or the connector of the motor electrically connected to the lead member 11. That is, after the connection part of the electric wire of the motor is connected to the lead member 11, the insulating sealing material having refrigerant resistance and oil resistance is filled in the peripheral wall portion 14b and solidified. Thus, all the inner conductive parts including the connection part of the electric wire or the connector of the motor electrically connected to the lead member 11 are insulated and covered.

[0046] like Figure 2As shown, the airtight terminal 20 of the present invention includes: a lead member 21, the lead member 21 includes an electrode plate 21a and a lead 21b of a conductive material; an outer ring base 22, the outer ring base 22 holds the lead member 21; an insulating material 23, the insulating material 23 is arranged between the lead member 21 and the outer ring base 22, and insulates them; and a cover member 24, the cover member 24 is fixed to a single surface of the outer ring base 22 with a curable resin.

[0047] The cover member 24 has peripheral wall portions 24 b and 24 d surrounding the exposed portion 25 of the lead member 21 . Figure 2 The cover member 24 (24a, 24b, 24c, 24d) is made of an electrically insulating material having refrigerant resistance and oil resistance. The peripheral wall portion 24d of the peripheral wall portions 24b and 24d can also be made detachable as needed.

[0048] When used in an electric compressor, the cover member 24 is arranged inside a sealed container that accommodates the motor. The cover member 24 is fixed in a manner that covers the inner lead member 21 and a portion of the outer ring base 22 except for the exposed portion 25. The inner lead 21b or the electrode plate 21a connected to the lead 21b is exposed inside the peripheral wall portions 24b and 24d. Figure 2 In (a) of FIG. 1 , the lead member 21 hidden by the cover member 24 is indicated by a dotted line.

[0049] Around the exposed portion of the lead 21b or the exposed portion 25 of the electrode plate 21a connected to the lead 21b, peripheral wall portions 24b and 24d are provided. By filling and curing the peripheral wall portions 24b and 24d with an insulating sealing material having refrigerant resistance and oil resistance, all the inner current-carrying parts including the electric wires of the motor electrically connected to the lead member 21 or the connection portion of the connector are insulated and covered.

[0050] The connection method of the airtight terminal disclosed herein is a connection method that connects the lead member of the airtight terminal disclosed herein to the wire or connector of the motor of the vehicle-mounted electric compressor and insulates and seals the connection portion and the exposed portion of the lead member.

[0051] like Figure 3 As shown in the process flow chart of FIG. 1 , in the connection method of this embodiment, first, the electric wire of the motor is connected to the exposed portion of the lead member surrounded by the peripheral wall portion of the airtight terminal (electrical connection process 31), then the peripheral wall portion is filled with a sealing resin (resin filling process 32), and then the sealing resin is cured (resin curing process 33). After that, the airtight terminal and the various components of the motor such as the stator and the rotor are assembled to assemble the electric compressor (motor assembly process 34).

[0052] According to the connection method of this embodiment, all the conductive parts (exposed metal parts, etc.) on the inner side of the airtight terminal arranged inside the sealed container of the motor, including the connection parts of the wires or connectors, are sealed in the sealing resin.

[0053] In the airtight terminal, a part of the peripheral wall portion can also be installed and removed. By removing a part of the peripheral wall portion opposite to the side of the exposed portion, the work of connecting the electric wire of the motor to the exposed portion is not hindered by the peripheral wall portion, and it becomes easy. After the connection work is completed through the connecting portion of the electric wire or the connector, the removed peripheral wall portion is installed again. The sealing resin is filled in the peripheral wall portion in the above order, and the exposed portion, the electric wire of the motor, or the connecting portion of the connector are all sealed with resin.

[0054] As an example of an electric compressor for vehicle use, refer to Figure 4 The outline of the scroll type electric compressor is described. The vehicle-mounted electric compressor 40 has a sealed container in which a sealed container 41 on the front side and a sealed container 42 on the rear side are fixed integrally to maintain airtightness by bolting or the like. The sealed containers 41 and 42 are usually formed of metal materials such as aluminum or aluminum alloy. The sealed container 42 has a suction port 43 for refrigerant and oil, and the sealed container 41 has a discharge port 44. The suction port 43 and the discharge port 44 are respectively connected to an external refrigerant circulation circuit not shown in the figure.

[0055] A scroll type compression mechanism 45 and a motor 46 for driving the compression mechanism 45 are housed inside the sealed container 41, 42. The motor 46 is composed of a rotating shaft 47 rotatably held in the sealed container 42 via a bearing, a rotor 48 fixed to the rotating shaft 47, and a stator 49 arranged on the outer periphery of the rotor 48 and fixed to the inner wall of the sealed container 42. The rotor 48 has a plurality of permanent magnets 401, and the stator 49 has a coil 402 wound in three phases.

[0056] The compression mechanism 45 is mainly composed of a fixed scroll 403 fixed to the inner wall of the closed container 41, 42 and a movable scroll 404 arranged opposite thereto. 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 the eccentric pin 407 of the rotating shaft 47 via a bearing and an eccentric bushing 406. The movable scroll 404 swings with the rotation of the rotating shaft 47, and can change the volume of the compression chamber 405 and compress the refrigerant.

[0057] On the other hand, an inverter housing 409 for accommodating the inverter device 408 is provided on a part of the outer peripheral wall of the sealed container 42. In the inverter housing 409, the inverter device 408 as an external power source and the airtight terminal 410 are installed in the plug hole of the sealed container 42. The airtight terminal 410 is electrically connected to the inverter device 408 via the connector 411 on the inverter side in the inverter housing 409. In addition, the airtight terminal 410 is electrically connected to the coil 402 of the stator 49 via the connecting portion 412 composed of the wire or connector of the motor 46 on the inner side 42a of the sealed container 42. That is, when the coil 402 of the motor 46 is energized from the inverter device 408 via the airtight terminal 410, the rotor 48 rotates, and the compression mechanism 45 is operated through the rotating shaft 47.

[0058] like Figure 4 As shown, the vehicle-mounted electric compressor 40 of the present embodiment includes: a compression mechanism 45; an electric motor 46, wherein the electric motor 46 drives the compression mechanism 45; an inverter device 408, wherein the inverter device 408 drives the electric motor 46; closed containers 41, 42, wherein the closed containers 41, 42 accommodate the electric motor 46 and the compression mechanism 45; an inverter housing 409, wherein the inverter housing 409 is joined to the closed containers 41, 42 and accommodates the inverter device 408; and an airtight terminal 410, wherein the airtight terminal 410 is disposed in the closed containers 41, 42 and is used to electrically connect the inverter device 408 to the electric motor 46.

[0059] like Figure 1 or Figure 2 As shown, the airtight terminal 410 includes: lead components 11, 21, which are formed of conductive materials; outer ring bases 12, 22, which hold the lead components 11, 21; insulating materials 13, 23, which are arranged between the lead components 11, 21 and the outer ring bases 12, 22 to insulate them; and cover components 14, 24, which are fixed to a single side of the outer ring bases 12, 22.

[0060] The cover member 14, 24 has a peripheral wall portion 14b or a peripheral wall portion 24b, 24d surrounding the exposed portion 15, 25 of the lead member 11, 21. The wire or connector of the motor 46 is connected to the exposed portion 15, 25 through the connecting portion 412. The inside of the peripheral wall portion is filled with a sealing resin that is resistant to refrigerant and oil. Provided is a vehicle-mounted electric compressor in which the exposed portion 15, 25 and the connecting portion 412 are sealed in the sealing resin so as to cover the exposed portion 15, 25 and the connecting portion 412 so as not to come into contact with the refrigerant and the lubricating oil.

[0061] like Figure 5As shown, the airtight terminal 50 of the present embodiment is installed in a sealed container 502. An electric motor is housed inside the sealed container 502. The lead member 51 of the airtight terminal 50 is electrically connected to the lead member 51 through the connecting portion 512 formed by the electric wire or molded connector of the motor. The interior of the peripheral wall portion 54d is filled with a sealing resin 54c that is resistant to refrigerants and oils, and all the current-carrying parts such as the connecting portion 512 are sealed in the sealing resin. The connecting portion 512 and other current-carrying parts are covered by the cured sealing resin in a manner that does not come into contact with the refrigerant and lubricating oil. The airtight terminal 50 is fixed to the sealed container 502 by screws 500 and the like in a state where the lead member is inserted into the plug hole 510 of the sealed container 502. In addition, in Figure 5 In (b), the lead member 51 hidden by the cover member 54 and the connection portion 512 of the connector connected to the lead member 51 are indicated by dotted lines.

[0062] Example

[0063] like Figure 1 As shown, the airtight terminal 10 of the first embodiment of the present disclosure includes: a lead member 11 of Fe-Cr alloy; an outer ring base 12 made of iron, the outer ring base 12 holds the lead member 11; an insulating material 13 made of soda barium glass, the insulating material 13 is arranged between the lead member 11 and the outer ring base 12, and insulates the lead member 11 from the outer ring base 12; and a cover member 14a of insulating plastic, the cover member 14a is fixed to a single side of the outer ring base 12 by epoxy resin of thermosetting resin.

[0064] The cover member 14a has a peripheral wall portion 14b that rectangularly surrounds the exposed portion 15 of the lead member 11. The cover member 14a is made of an electrically insulating plastic material that is resistant to refrigerants and oils. When used in an electric compressor, the cover member 14a is arranged inside a sealed container that accommodates the motor.

[0065] The inner side of the lead member 11 passes through the cover member 14a, and the cover member 14a is fixed in a manner of covering a part of the outer ring base 12. The inner side of the lead member 11 is exposed inside the peripheral wall portion 14b. The cover member 14a insulates and covers all the inner energized parts including the electric wires of the motor or the connection part of the connector electrically connected to the lead member 11. The outer ring base 12 has a hole 100 for fastening.

[0066] like Figure 2 As shown, the airtight terminal 20 of the second embodiment of the present disclosure includes three lead members 21 , an outer ring base 22 made of iron, an insulating material 23 made of soda barium glass, and a cover member made of plastic.

[0067] The three lead members 21 are respectively composed of a lead 21b of Fe-Cr alloy and an electrode plate 21a connected to one side of the lead 21b. The lead 21b of the lead member 21 passes through the outer ring base 22. The lead member 21 is held by the outer ring base 22. The insulating material 23 is provided between the lead 21b and the outer ring base 22 to insulate them.

[0068] The cover member 24 is provided on the outer ring base 22 and covers the lead wires 21b and the insulating material 23. The inner space surrounded by the outer ring base 22 and the cover member 24 is filled with a curable resin 24c. The cover member 24 is fixed to the outer ring base 22 by the curable resin 24c.

[0069] The cover member 24 has peripheral wall portions 24b and 24d that surround the exposed portion 25 of the electrode plate 21a in a rectangular shape. The peripheral wall portion 24d can be slidably removed from the peripheral wall portion 24b. Thus, in the electrical connection process, the connection operation with the lead member 21 can be performed with the peripheral wall portion 24d removed. Since it will not be hindered by the peripheral wall portion 24d, the connection operation becomes easy.

[0070] Around the exposed portion 25 of the electrode plate 21a connected to the lead 21b, peripheral wall portions 24b and 24d are provided. The peripheral wall portions 24b and 24d are filled with an insulating sealing material having refrigerant resistance and oil resistance and solidified. All the inner energized parts including the connecting parts of the electric wires or connectors of the motor electrically connected to the lead member 21 are insulated and covered with insulating sealing materials. In this way, by providing the peripheral wall portions 24b and 24d of the cover member 24, the energized parts can be insulated and covered with insulating sealing materials. The outer ring base 22 has a hole 200 for fastening.

[0071] In the connection method of embodiment 3 of the present disclosure, Figure 3 As shown, first, the connection part of the electric wire or busbar of the motor is connected to the exposed part of the lead member surrounded by the peripheral wall of the airtight terminal in a rectangular shape (electrical connection process 31). Next, the inside of the peripheral wall is filled with epoxy sealing resin (resin filling process 32). The epoxy sealing resin is cured (resin curing process 33). After that, the airtight terminal and the various parts of the motor such as the stator are assembled to assemble a motor for driving the vehicle-mounted electric compressor (motor assembly process 34).

[0072] like Figure 4As shown, the vehicle-mounted electric compressor 40 of embodiment 4 of the present disclosure includes: a compression mechanism 45; an electric motor 46, wherein the electric motor 46 drives the compression mechanism 45; an inverter device 408, wherein the inverter device 408 drives the electric motor 46; closed containers 41, 42, wherein the closed containers 41, 42 accommodate the electric motor 46 and the compression mechanism 45; an inverter housing 409, wherein the inverter housing 409 is coupled to the closed container and accommodates the inverter device 408; and an airtight terminal 410, wherein the airtight terminal 410 is disposed in the closed container and is used to electrically connect the inverter device 408 to the electric motor 46.

[0073] like Figure 2 As shown, the airtight terminal 410 includes: a lead member 21, which is formed of a conductive material; an outer ring base 22, which holds the lead member 21; an insulating material 23, which is arranged between the lead member 21 and the outer ring base 22 to insulate them; and a cover member 24, which is fixed to a single surface of the outer ring base 22.

[0074] The cover member 24 has peripheral wall portions 24b and 24d that surround the exposed portion 25 of the lead member 21 in a rectangular shape. The molded connector of the motor 46 is connected to the exposed portion 25 via the connecting portion 412. The inside of the peripheral wall portions 24b and 24d is filled with a sealing resin that is resistant to refrigerants and oils. Provided is a vehicle-mounted electric compressor in which the exposed portion 25 and the connecting portion 412 are completely sealed in the sealing resin so that the exposed portion 25 and the connecting portion 412 are covered so as not to come into contact with the refrigerant and the lubricating oil.

[0075] Figure 5 The periphery of the plug-in portion of the airtight terminal 410 of Example 4 is shown. The airtight terminal 410 is installed in the sealed container 502. An electric motor is housed inside the sealed container 502. The lead member is electrically connected to the molded connector 511 of the motor. The interior of the rectangular peripheral wall portion 54d is filled with a sealing resin 54c that is resistant to refrigerants and oils. The energized portion including the connecting portion 512 is sealed in the sealing resin 54c. The energized portion is covered by the sealing resin 54c in a manner that does not come into contact with the refrigerant and lubricating oil. The airtight terminal 410 is plugged into the plug-in hole 510 of the sealed container 502, and is fastened and installed by screws 500.

[0076] The lead member of the airtight terminal of the present disclosure can be provided with a desired plating coating on its surface. The lead member and the outer ring base can be any material as long as they are metal materials that can be used for airtight terminals. It is not limited to Fe-Cr alloys, and for example, Fe-Ni alloys, carbon steel, copper alloys, aluminum alloys, etc. can also be used.

[0077] The insulating material described in the embodiment can be any material that can electrically insulate and hermetically seal the lead member and the metal base. It is not limited to the soda barium glass of the embodiment, and any glass material, resin sealing material, or ceramic material can be used. For example, if necessary, a part of the insulating material can also be formed by a different glass material. If necessary, a part or all of the glass material can also be replaced with a resin material such as epoxy resin.

[0078] It should be understood that although specific embodiments of the present disclosure have been described, the embodiments disclosed herein are illustrative in all points and are not restrictive. The scope of the present disclosure is indicated by the claims, and the present disclosure includes all changes within the meaning and scope equivalent to the claims.

[0079] Industrial Applicability

[0080] The present disclosure can be used for a hermetic terminal, and in particular, can be used for a hermetic terminal for vehicle use.

[0081] Explanation of symbols

[0082] 10, 20, 50, 410 airtight terminal; 11, 21, 51 lead member; 12, 22 outer ring base; 13, 23 insulating material; 14, 14a, 24, 54 cover member; 14b, 24b, 24d, 54d peripheral wall portion; 15, 25 exposed portion; 21a electrode plate; 21b lead wire; 24c curable resin; 31 electrical connection process; 32 resin filling process; 33 resin curing process; 34 motor assembly process; 40 electric compressor; 41, 42, 502 sealed container; 42a inner side; 43 suction port; 44 discharge port; 45 compression mechanism; 46 electric motor; 47 rotating shaft; 48 rotor; 49 stator; 54c sealing resin; 100, 200 holes; 401 permanent magnet; 402 coil; 403 fixed scroll; 404 movable scroll; 405 compression chamber; 406 eccentric bushing; 407 eccentric pin; 408 inverter device; 409 inverter housing; 411, 511 connectors; 412, 512 connecting parts; 500 screws, 510 plug holes.

Claims

1. A hermetic terminal, comprising: a plurality of lead members, wherein the plurality of lead members are formed of a conductive material; an outer ring base, the outer ring base holding a plurality of the lead members; an insulating material, the insulating material being disposed between the lead member and the outer ring base and insulating the lead member from the outer ring base; as well as a cover member, the cover member being fixedly connected to at least one surface of the outer ring base, The end of the lead member has an exposed portion exposed from the insulating material, The cover member includes a peripheral wall portion that surrounds the exposed portions of the plurality of lead members, and an inner peripheral wall surface of the peripheral wall portion faces a side peripheral surface of the exposed portion of each of the lead members.

2. The airtight terminal according to claim 1, characterized in that: The cover member is made of an electrically insulating material having refrigerant resistance and oil resistance.

3. The airtight terminal according to claim 1 or 2, characterized in that: The cover member is fixed to the outer ring base by using a curable resin.

4. The airtight terminal according to claim 1 or 2, characterized in that: The peripheral wall portion of the cover member surrounds the exposed portion in a rectangular shape.

5. The airtight terminal according to claim 1 or 2, characterized in that: The entirety or a portion of the peripheral wall portion of the cover member may be detachable.

6. An electric compressor comprising: The hermetic terminal according to any one of claims 1 to 5; Compression mechanism; an electric motor, the electric motor driving the compression mechanism; an electric wire connecting the motor and the airtight terminal; an inverter device, the inverter device driving the electric motor; A sealed container, wherein the sealed container accommodates the motor and the compression mechanism; An inverter housing, the inverter housing being coupled to the sealed container and accommodating the inverter device; a connecting portion electrically connecting the wire to the exposed portion; as well as a sealing resin filled in the interior of the peripheral wall portion, The exposed portion and the connecting portion are sealed in the sealing resin.

7. The electric compressor according to claim 6, characterized in that The connection portion has a connector that is provided at an end portion of the electric wire and connects the electric wire to the exposed portion of the lead member.

8. A connection method, The connecting method is a connecting method for connecting the airtight terminal according to any one of claims 1 to 5 to an electric wire of an electric compressor. The electric compressor comprises: Compression mechanism; an electric motor, the electric motor driving the compression mechanism; an electric wire connecting the motor and the airtight terminal; An inverter device, the inverter device drives the motor; a sealed container, the sealed container accommodates the motor and the compression mechanism; an inverter housing, the inverter housing is engaged with the sealed container and accommodates the inverter device; and a connecting portion that electrically connects the wire to the exposed portion, The connection method includes: a step of connecting the electric wire of the motor to the exposed portion of the lead member surrounded by the peripheral wall portion of the airtight terminal through the connecting portion; a step of filling the peripheral wall portion with a sealing resin and sealing the exposed portion and the connecting portion in the sealing resin; and A step of curing the sealing resin.

9. The connection method according to claim 8, characterized in that: After the step of curing the sealing resin, the method further includes a step of assembling the components constituting the motor.

10. The connection method according to claim 8 or 9, characterized in that: Part or all of the peripheral wall portion is configured to be removable. After the step of connecting by the connecting portion, the step of installing a part or all of the removed peripheral wall portion is also included. The step of filling the sealing resin is performed after the step of mounting a part or the whole of the peripheral wall portion.

11. A hermetic terminal, comprising: a lead member formed of a conductive material; an outer ring base, the outer ring base retaining the lead member; an insulating material, the insulating material being disposed between the lead member and the outer ring base and insulating the lead member from the outer ring base; as well as a cover member, the cover member being fixedly connected to at least one surface of the outer ring base, The end of the lead member has an exposed portion exposed from the insulating material, The cover member includes a peripheral wall portion surrounding the exposed portion of the lead member, The entirety or a portion of the peripheral wall portion of the cover member may be detachable.

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