WO2023063108A1 - 気密端子および圧縮機 - Google Patents

気密端子および圧縮機 Download PDF

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Publication number
WO2023063108A1
WO2023063108A1 PCT/JP2022/036669 JP2022036669W WO2023063108A1 WO 2023063108 A1 WO2023063108 A1 WO 2023063108A1 JP 2022036669 W JP2022036669 W JP 2022036669W WO 2023063108 A1 WO2023063108 A1 WO 2023063108A1
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WO
WIPO (PCT)
Prior art keywords
airtight terminal
insulating member
voltage side
main surface
terminal according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/036669
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English (en)
French (fr)
Japanese (ja)
Inventor
裕貴 川端
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP2023555112A priority Critical patent/JP7700255B2/ja
Publication of WO2023063108A1 publication Critical patent/WO2023063108A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case

Definitions

  • the present disclosure relates to airtight terminals and compressors.
  • the airtight terminals used in refrigerant compressors (compressors) for refrigerators and air conditioners are required to have high withstand voltage and withstand voltage because the compressor is placed inside a pressure-resistant container filled with refrigerant.
  • a circular top plate portion a tubular portion extending downward from the outer peripheral end of the top plate portion, a flange portion extending from the lower end of the tubular portion, and an inner side from the top plate portion a metal outer ring provided with a small cylindrical portion extending along the length of the metal ring and having a lead sealing hole formed therein; a lead sealed in the lead sealing hole of the metal outer ring via a sealing glass; and an insulating sleeve welded to the sealing glass on the inner surface side of the ring so that the insulating sleeve extends beyond the small tubular portion in parallel with the top plate portion to the sealing glass on the inner surface side of the metal outer ring.
  • a hermetic terminal for a compressor has been proposed which is welded to the . It also describes that the insulating sleeve is made of ceramics such as alumina and forsterite.
  • Patent Document 2 a columnar insulator having a through-hole formed in the axial direction, a conductor pin inserted into the through-hole with both ends protruding, and a metal joining member that airtightly joins the end surface of the insulator and the conductor pin. and a metal sleeve joined to the outer peripheral surface of the insulator, wherein at least one of the metal joining members is a cylindrical main body having a diameter smaller than that of the insulator and larger than that of the conductor pin, and one of the main bodies.
  • a collar portion that is integrally provided on the end side and is joined to the end surface of the insulator, and a conductor pin that is integrally provided on the other end side of the body portion via a stepped portion are inserted and joined.
  • An airtight terminal including a cylindrical portion has been proposed.
  • the airtight terminal according to the present disclosure is composed of a conductive pin, a cylindrical insulating member having through holes that are open to the high-voltage side and the low-voltage side and into which the conductive pin is inserted, and a metal that surrounds the insulating member. It comprises an annular member, and a brazing portion for fixing a conductive pin to a main surface on the high voltage side of the insulating member or to a convex surface of a convex portion provided on the main surface.
  • the insulating member has a base located in the inner space of the annular member and an extension extending from the base toward the low voltage side. The outermost diameter of the base is greater than the outermost diameter of the extension.
  • a compressor according to the present disclosure includes a casing housing a motor for compressing refrigerant, and the airtight terminal attached to the casing. Power is supplied to the motor from an external power supply through the conduction pins.
  • FIG. 2 is a plan view of the hermetic terminal of a non-limiting embodiment of the present disclosure, viewed from the main surface of the low voltage side of the insulating member;
  • FIG. 2 is a plan view of the airtight terminal shown in FIG. 1 viewed from the main surface of the high-voltage side of the insulating member;
  • FIG. 3 is a cross-sectional view of the airtight terminal shown in FIGS. 1 and 2 taken along line III-III. 4 is the same cross-sectional view as FIG. 3;
  • FIG. 4 is an enlarged view of the periphery of the outer surface of the extending portion in the airtight terminal shown in FIG. 3;
  • FIG. 1 is a schematic diagram of a compressor according to a non-limiting embodiment of the present disclosure;
  • Patent Document 1 When the volume of the insulating sleeve (Patent Document 1) in the inner space of the metal outer ring is large, there is a problem that higher pressure resistance is required. Moreover, in fixing with a metal sleeve (Patent Document 2), there is a problem that the insulator tends to separate from the metal sleeve due to shearing action. Further, when exposed to high temperatures, the sealing glass is likely to melt, and there is a demand for a structure that can withstand exposure to high temperatures.
  • the present disclosure provides an airtight terminal and a compressor with high withstand voltage and pressure resistance.
  • the airtight terminal and compressor according to the present disclosure have high withstand voltage and pressure resistance.
  • Airtight terminals according to non-limiting embodiments of the present disclosure will be described in detail with reference to the drawings.
  • the hermetic terminal may comprise any components not shown in the referenced figures.
  • the dimensions of the members in each drawing do not faithfully represent the actual dimensions of the constituent members, the dimensional ratios of the respective members, and the like.
  • the airtight terminal 1 comprises a conducting pin 2, an insulating member 3, an annular member 4 and a brazing portion 5, as in the example shown in FIGS.
  • This airtight terminal 1 can be used, for example, in a compressor or the like.
  • each component of the airtight terminal 1 will be described in order, taking as an example the case where the airtight terminal 1 is for a compressor.
  • the conductive pin 2 is conductive and can function as a conductive path for inputting and outputting electric signals to and from the pressure container to which the airtight terminal 1 is attached.
  • Examples of the material of the conductive pin 2 include oxygen-free copper, tough pitch copper, copper such as phosphorus-deoxidized copper, titanium, nickel, austenitic stainless steel (eg, SUS304), and Cu—Ni alloy (eg, cupronickel). , Fe—Co alloys, Fe—Co—C alloys, Fe—Ni alloys, and Fe—Ni—Co alloys.
  • the shape of the conducting pin 2 may be cylindrical or polygonal.
  • the number of conductive pins 2 may be one or plural. When there are a plurality of conduction pins 2, the number of conduction pins 2 may be 2 or more and 50 or less.
  • the insulating member 3 has insulating properties and can hold the conductive pin 2 while electrically insulating it.
  • Examples of the material of the insulating member 3 include electrical insulating materials such as sintered aluminum oxide.
  • the shape of the insulating member 3 is cylindrical. More specifically, the insulating member 3 has a columnar shape extending along the axis S. As shown in FIG. Axis S passes through the center of each of the two main surfaces 32 , 33 of insulating member 3 .
  • the insulating member 3 has through holes 31 for inserting the conduction pins 2 .
  • the through hole 31 opens to the high voltage side A ⁇ b>1 and the low voltage side A ⁇ b>2 of the insulating member 3 .
  • the high pressure side A1 may mean the side with relatively high pressure
  • the low pressure side A2 may mean the side with relatively low pressure.
  • the high pressure side A1 of the insulating member 3 may be located at a higher pressure than the low pressure side A2 of the insulating member 3.
  • the main surface 32 of the high pressure side A1 may be located inside the pressure vessel
  • the main surface 33 of the low pressure side A2 may be located outside the pressure vessel.
  • the through hole 31 may be opened in the main surface 32 of the high voltage side A1 of the insulating member 3 or in the convex surface 341 (top surface) of the convex portion 34 provided on the main surface 32.
  • the main surface 33 on the side A2 may be opened.
  • the number of through-holes 31 may be one, or plural.
  • the number of through holes 31 may be the same as the number of conduction pins 2 .
  • the plurality of through-holes 31 may be positioned at regular intervals along the circumferential direction of the insulating member 3 .
  • the three through holes 31 may be positioned so as to be rotationally symmetrical at 120° with respect to the axis S of the insulating member 3 .
  • the conductive pin 2 is inserted into the through hole 31 with both ends projected.
  • electricity is generated between the devices inside and outside the pressure vessel.
  • the airtight terminal 1 can function as a terminal for transmitting signals.
  • the annular member 4 can function as an attachment portion for attaching the airtight terminal 1 to the pressure-resistant container. Therefore, the airtight terminal 1 may be attached to the pressure container via the annular member 4 .
  • the annular member 4 surrounds the insulating member 3 . More specifically, the annular member 4 surrounds at least part of the insulating member 3 .
  • the annular shape of the annular member 4 is not limited to an annular shape, but is a concept that includes an annular or tubular shape as long as the insulating member 3 can be surrounded. Therefore, the shape of the annular member 4 is not limited to an annular shape, and may be annular or tubular. For example, as in the example shown in FIG. 3, the shape of the annular member 4 may be cylindrical. Moreover, the outer diameter of the annular member 4 may be constant.
  • the annular member 4 is made of metal.
  • metals include carbon steel for machine structural use such as S25C, rolled steel for general structural use (cold rolled steel) such as SS400, and Fe--Ni--Co alloys.
  • the brazing portion 5 is a portion for fixing the conducting pin 2 to the main surface 32 of the high voltage side A1 of the insulating member 3 or to the convex surface 341 of the convex portion 34 provided on the main surface 32 .
  • the brazing material include silver solder (eg, Bag-8 and Bag-9).
  • the number of brazed parts 5 may be one, or may be plural.
  • the number of brazing portions 5 may be the same as the number of conducting pins 2 . When there are a plurality of brazed portions 5, the plurality of brazed portions 5 are positioned apart from each other.
  • brazing portions 5 When the number of brazing portions 5 is three, as in the example shown in FIG.
  • the brazed portion 53 may be used. These points are the same for the conduction pin 2 and the through hole 31 as well.
  • the insulating member 3 includes a base portion 35 located in the inner space of the annular member 4 and an extension portion 36 extending from the base portion 35 toward the low voltage side A2.
  • the outermost diameter D1 of the base portion 35 is larger than the outermost diameter D2 of the extension portion 36 .
  • the spatial distance and creepage distance between the conductive pin 2 and the annular member 4 on the low voltage side A2 are increased, so that the withstand voltage can be increased.
  • the low pressure side A2 of the base portion 35 can be attached to the metallic annular member 4 as it is by brazing or the like, the pressure resistance can be increased.
  • outermost diameter D1 and the outermost diameter D2 are not limited to specific values.
  • the outermost diameter D1 may be set to approximately 20 mm or more and 30 mm or less.
  • the outermost diameter D2 may be set to approximately 15 mm or more and 20 mm or less.
  • the numerical value of the length L1 (mm) of the extending portion 36 in the direction of the axis S may be 1/400 times or more the numerical value of the potential difference (V/mm) generated between the annular member 4 and the conductive pin 2. .
  • the spatial distance and creepage distance between the outer peripheral surface of the conducting pin 2 exposed on the low voltage side A2 and the surface of the annular member 4 closest to the outer peripheral surface of the conducting pin 2 can be made longer. Therefore, the withstand voltage can be further increased.
  • the numerical value of the length L1 (mm) of the extending portion 36 in the direction of the axis S is 1/100 times or more the numerical value of the potential difference (V/mm) generated between the annular member 4 and the conductive pin 2. good too.
  • the potential difference (V/mm) may be measured by, for example, a withstand voltage tester.
  • the length L1 of the extending portion 36 in the direction of the axis S may be 7 mm or more.
  • the spatial distance and creepage distance between the outer peripheral surface of the conducting pin 2 exposed on the low voltage side A2 and the surface of the annular member 4 closest to the outer peripheral surface of the conducting pin 2 can be made longer. Therefore, the withstand voltage can be further increased.
  • the upper limit of the length L1 may be 12 mm.
  • the length L1 of the extending portion 36 in the direction of the axis S may be longer than the length L2 of the base portion 35 in the direction of the axis S. In this case, the spatial distance and creepage distance between the conductive pin 2 and the annular member 4 on the low voltage side A2 are increased, so that the withstand voltage can be increased.
  • the length L2 is not limited to a specific value. For example, the length L2 may be set to approximately 7 mm or more and 12 mm or less.
  • the outer surface 361 of the extension 36 may be inclined toward the low pressure side A2.
  • the outer side surface 361 of the extending portion 36 may be an inclined surface that inclines so as to approach the axis S of the insulating member 3 toward the main surface 33 of the low voltage side A2.
  • the outer side surface 361 of the extending portion 36 may form an acute angle ⁇ with the axis S of the insulating member 3 .
  • CIP cold isostatic pressing
  • angle ⁇ is not limited to a specific value.
  • the angle ⁇ may be set to approximately 2° or more and 3° or less.
  • An imaginary axis S' parallel to the axis S may be used as a reference when evaluating the angle ?.
  • the outer surface 361 of the extending portion 36 has a cutting level at a load length ratio of 25% in the roughness curve and a load length of 75% in the roughness curve than the main surface 32 of the high voltage side A1 of the insulating member 3.
  • the average value of the cutting level difference (R ⁇ c) representing the difference from the cutting level at the cutting rate may be small.
  • the particles are a plurality of fine solid particles that are part of the crystals that form the sintered body of aluminum oxide sintered body or the like and are desorbed into the space when the insulating member 3 is made of sintered body of aluminum oxide. Since such detachment of particles is reduced, floating of the detached particles in the space (for example, vacuum space) of the low pressure side A2 is suppressed.
  • the average value of the cutting level difference (R ⁇ c) of the main surface 32 may be 1 ⁇ m or more and 2.2 ⁇ m or less, or may be 1 ⁇ m or more and 1.9 ⁇ m or less.
  • the difference ( ⁇ R ⁇ c) between the average cutting level difference (R ⁇ c) of the outer surface 361 and the average cutting level difference (R ⁇ c) of the main surface 32 is, for example, 0.2 ⁇ m or more and 0.7 ⁇ m or less.
  • the cutting level difference (R ⁇ c) is, for example, based on JIS B 0601: 2001, and as follows, lines to be measured are measured at approximately equal intervals in each of the three measurement ranges on the outer surface 361 and the main surface 32.
  • a line roughness measurement may be performed by drawing four lines, and an average value of 12 measured values for each of the outer surface 361 and the main surface 32 may be calculated.
  • the measurement conditions may be set as follows.
  • Measuring machine Shape analysis laser microscope ("VK-X1100" manufactured by Keyence Corporation or its successor model) Illumination: Coaxial epi-illumination Cutoff value ⁇ s: None Cutoff value ⁇ c: 0.08mm Cutoff value ⁇ f: None End effect correction: Yes Measurement magnification: 240 times (10 ⁇ 24) Surface shape correction: waviness removal Strength of correction: 5 Setting of height threshold value: Ignore minute area (103.34 ⁇ m 2 ) Measurement points: 3 points each on outer surface 361 and main surface 32 Measurement range: 1428 ⁇ m ⁇ 1071 ⁇ m/1 point Length of line to be measured: 1280 ⁇ m/1 piece
  • the shape of the extending portion 36 may be a truncated cone shape.
  • the shape of the extending portion 36 is a truncated pyramid, stress concentration is likely to occur on the side edges. Therefore, the extending portion 36 is less likely to be damaged.
  • the base 35 may comprise a small diameter portion 351 and a large diameter portion 352 .
  • the small diameter portion 351 may be located on the high pressure side A1.
  • the large diameter portion 352 may be located on the low pressure side A2. More specifically, the large diameter portion 352 may be positioned closer to the low pressure side A2 than the small diameter portion 351 is.
  • the outer diameter D4 of the large diameter portion 352 may be larger than the outer diameter D3 of the small diameter portion 351 .
  • the base portion 35 includes the small-diameter portion 351 and the large-diameter portion 352
  • a step surface 353 connecting the outer peripheral surface of the small-diameter portion 351 and the large-diameter portion 352 is formed.
  • the base portion 35 includes a stepped surface 353 that connects the outer peripheral surface of the small diameter portion 351 and the outer peripheral surface of the large diameter portion 352 . Due to the presence of this stepped surface 353, the creeping distance between the conductive pin 2 and the annular member 4 on the high voltage side A1 is increased, so that the withstand voltage can be increased.
  • the outer diameter D4 of the large diameter portion 352 may be the outermost diameter D1 of the base portion 35 .
  • the outer diameter D3 of the small diameter portion 351 may be larger than the outermost diameter D2 of the extension portion 36 . When the outer diameter D3 is larger than the outermost diameter D2, the strength of the base portion 35 is high.
  • the length L3 of the small diameter portion 351 in the direction of the axis S may be shorter than the length L4 of the large diameter portion 352 in the direction of the axis S. In this case, since the length L4 of the large-diameter portion 352 in the direction of the axis S is relatively long, the strength of the base portion 35 is high.
  • the compressor 100 comprises a casing 101 (pressure vessel) and an airtight terminal 1.
  • a casing 101 houses a motor 102 for compressing refrigerant.
  • the airtight terminal 1 is attached to the casing 101 .
  • Power from an external power supply 103 is supplied to the motor 102 via the conduction pins 2 .
  • the compressor 100 is provided with the airtight terminal 1 having high withstand voltage and pressure resistance, stable operation is possible over a long period of time.
  • the airtight terminal 1 may be attached to the casing 101 by welding, for example.
  • Motor 102 may be, for example, a three-phase motor.
  • the external power supply 103 may be, for example, a three-phase AC power supply. Motor 102 and external power supply 103 may be electrically connected to conductive pins 2 via wiring 104 .
  • the compressor 100 may comprise a compression mechanism 105, a suction pipe 106 and a discharge pipe 107.
  • Compression mechanism 105 is housed in casing 101 .
  • Suction tube 106 and discharge tube 107 are attached to casing 101 .
  • Suction tube 106 and discharge tube 107 may be attached to casing 101 by welding, for example.
  • the compression mechanism 105 is driven by the motor 102 and compresses the refrigerant.
  • Suction tube 106 delivers refrigerant to compression mechanism 105 .
  • the discharge pipe 107 discharges the refrigerant compressed by the compression mechanism 105 and sends it out to the refrigerant circulation system.
  • the compressor 100 When the compressor 100 includes the compression mechanism 105, the suction pipe 106, and the discharge pipe 107, power is supplied from the external power supply 103 to the motor 102 through the airtight terminal 1, and the motor 102 is driven to operate the compression mechanism.
  • 105 is enabled to compress the refrigerant. Refrigerant flows from the suction pipe 106 into the compression mechanism 105, and the compressed refrigerant flows out from the discharge pipe 107 and is sent to the refrigerant circulation system.
  • the airtight terminal 1 is for a compressor used in a refrigerator, but the airtight terminal 1 can also be applied to other uses.
  • Other uses include, for example, sensor units, aluminum electrolytic capacitors, contact devices for relays, medical equipment, storage devices, and compressors driven by electric motors used in hybrid and electric vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
PCT/JP2022/036669 2021-10-15 2022-09-30 気密端子および圧縮機 Ceased WO2023063108A1 (ja)

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JP2023555112A JP7700255B2 (ja) 2021-10-15 2022-09-30 気密端子および圧縮機

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JP2021169325 2021-10-15
JP2021-169325 2021-10-15

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140613A (en) * 1977-08-09 1979-02-20 Mitsubishi Denki Kabushiki Kaisha Sealed terminal
JP2008311424A (ja) * 2007-06-14 2008-12-25 Toyota Central R&D Labs Inc ハーメチックシール端子とその製造方法
JP2010244927A (ja) * 2009-04-08 2010-10-28 Nec Schott Components Corp 高耐圧気密端子およびその製造方法
JP2020089159A (ja) * 2018-11-29 2020-06-04 株式会社東芝 電気配線貫通装置およびその製造方法
JP2021159996A (ja) * 2020-03-31 2021-10-11 京セラ株式会社 光透過窓接合体

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3012082B2 (ja) * 1992-04-21 2000-02-21 京セラ株式会社 気密端子

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140613A (en) * 1977-08-09 1979-02-20 Mitsubishi Denki Kabushiki Kaisha Sealed terminal
JP2008311424A (ja) * 2007-06-14 2008-12-25 Toyota Central R&D Labs Inc ハーメチックシール端子とその製造方法
JP2010244927A (ja) * 2009-04-08 2010-10-28 Nec Schott Components Corp 高耐圧気密端子およびその製造方法
JP2020089159A (ja) * 2018-11-29 2020-06-04 株式会社東芝 電気配線貫通装置およびその製造方法
JP2021159996A (ja) * 2020-03-31 2021-10-11 京セラ株式会社 光透過窓接合体

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JP7700255B2 (ja) 2025-06-30

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