WO2008007534A1 - dispositif terminal hermétique pour compresseur électrique - Google Patents
dispositif terminal hermétique pour compresseur électrique Download PDFInfo
- Publication number
- WO2008007534A1 WO2008007534A1 PCT/JP2007/062709 JP2007062709W WO2008007534A1 WO 2008007534 A1 WO2008007534 A1 WO 2008007534A1 JP 2007062709 W JP2007062709 W JP 2007062709W WO 2008007534 A1 WO2008007534 A1 WO 2008007534A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- sealed
- holder
- wall
- terminal device
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/521—Sealing between contact members and housing, e.g. sealing insert
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/013—Sealing means for cable inlets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/803—Electric connectors or cables; Fittings therefor
Definitions
- the present invention relates to an electric compressor incorporating an electric motor, and relates to a sealed terminal device for establishing an electrical connection between the electric motor and the outside.
- This type of electric compressor includes a housing, a compression unit and an electric motor housed in the housing (Patent Document 1).
- the compression unit is driven by an electric motor and performs a series of processes from suction and compression of the working fluid to discharge.
- the compressor described above further includes a sealed terminal device for establishing an electrical connection between the electric motor and the outside, and the sealed terminal device includes a plurality of sealed terminals. These sealing terminals penetrate through the wall of the housing in an airtight manner and have both end portions projecting inward and outward of the housing, respectively.
- Patent Document 1 Japanese Patent Laid-Open No. 11-324920
- the above-mentioned sealed terminal is fixed to the wall of the housing via a glass and a metal holder, and this glass is electrically connected between the sealed terminal and the metal holder or between the sealed terminal and the wall of the housing. While keeping the inside of the housing airtight.
- the use of the glass described above is not necessary for the use of a metal holder or sealed terminal that requires a nickel plating treatment on the metal holder in order to ensure the adhesion between the metal holder and the glass. Fixing takes a lot of work. Therefore, in the case of a sealed terminal device using glass, it is not easy to attach the sealed terminal device to the housing wall.
- the object of the present invention is to ensure sufficient electrical insulation between the sealed terminal and the surroundings, It is an object of the present invention to provide a sealed terminal device for an electric compressor that facilitates terminal attachment and can be miniaturized as a whole.
- a sealed terminal device of the present invention is a terminal holder to be attached to a housing wall in an electric compressor, and has an electric insulation and an inner and an outer sandwiching the wall.
- a terminal holder including a holder half and a plurality of sealed terminals held by the terminal holder, each sealed terminal penetrating the wall with play between the electric motor and the external
- a plurality of sealed terminals having both ends for being electrically connected to the device; a sealing member for sealing between the wall and the terminal holder and between the terminal holder and the sealed terminal; and the sealed terminal And an insulating element to increase the degree of electrical insulation between the surrounding member and the surrounding member.
- the sealed terminal device of the present invention Since the above-mentioned sealed terminal device is provided with a sealing member and an insulating element separately, it is necessary to ensure sufficient electrical insulation between the sealed terminal and the surroundings while ensuring sufficient sealing performance of the sealed terminal device. Can do. Therefore, according to the sealed terminal device of the present invention, the required distance between the sealed terminals can be shortened, and the overall small size can be achieved.
- the insulating element may include a region formed in the terminal holder and increasing an edge distance between at least one of the sealing terminals and between the recording wall and the sealing terminal.
- the region can have a groove formed in the outer surface of the terminal holder and extending between the sealed terminals and a cavity formed in the terminal holder. Such grooves and cavities increase the edge distance between the sealed terminals and between the sealed terminals and the housing wall, and improve the degree of electrical insulation of the sealed terminals with respect to the surroundings.
- the groove extends in the radial direction of the terminal holder and the cavity is positioned surrounding the sealing terminal and adjacent to the wall.
- the insulating element can include an electrically insulating barrier interposed between the sealed terminals, the electrically insulating barrier having an electrically insulating layer formed on the outer surface of the sealed terminal.
- the electric insulating layer covers the entire outer surface of the sealed terminal except for both ends of the sealed terminal.
- Such an electrical insulation layer increases the degree of electrical insulation not only between the sealed terminals, but also between the sealed terminals and the housing wall.
- the sealing terminal also serves as a fastening bolt for attaching the terminal holder to the wall of the housing.
- the terminal holder can be easily attached to the housing wall.
- the sealing terminal is formed between the rod having one end to be positioned on the electric motor side and the other end to be positioned on the external device side, and the rod between the housing wall and the holder.
- a flange for sandwiching one of the halves and a fastening nut attached to the other end of the rod and sandwiching the other of the holder body between the walls of the housing can be included.
- the terminal holder further includes a staggered surface for preventing rotation of the sealed terminal.
- the sealed terminal device of the electric compressor of the present invention is provided with the seal member and the insulating element separately, it is possible to achieve a small size of the sealed terminal device while ensuring sufficient sealing performance.
- FIG. 1 shows one type of electric compressor to which the present invention is applied, and this compressor includes a power supply control board arranged in a housing.
- FIG. 2 shows another type of electric compressor to which the present invention is applied, and this compressor includes the power supply control board outside the housing.
- FIG. 3 is a cross-sectional view showing the sealed terminal device of the first embodiment.
- FIG. 4 is an arrow view from the direction IV in FIG.
- FIG. 5 is an enlarged cross-sectional view of the groove in FIG.
- FIG. 6 is a cross-sectional view showing a sealed terminal device of a second embodiment.
- FIG. 7 is a cross-sectional view showing a sealed terminal device of a third embodiment.
- FIG. 8 is an arrow view from the direction VIII in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIGS. 1 and 2 show electric compressors to which the present invention is applied, respectively.
- Each of these electric compressors includes a metal housing 2, and a compression unit 4 and an electric motor 6 accommodated in the housing 2.
- the compression unit 4 in FIGS. 1 and 2 is shown as a scroll unit.
- the compressor in FIG. 1 further includes a power supply control board 8 accommodated in the housing 2.
- the control board 8 includes an inverter and controls the supply of electric power to the electric motor 6 and the driving of the electric motor 6. More specifically, a partition wall 9 is disposed in the housing 2 of FIG. 1, and the partition wall 9 is divided into a chamber that houses the compression unit 4 and the electric motor 6 and a chamber that houses the control board 8. ing.
- each of the compressors in FIG. 1 and FIG. 2 includes a sealed terminal device 10 for electrically connecting the electric motor 6 or the control board 8 to an electric device (not shown) outside the housing 2.
- the hermetic terminal device 10 is attached to the housing wall of the housing 2, and this housing wall is the aforementioned partition wall or the outer wall of the housing 2.
- 3 to 5 show the sealed terminal device 10 of the first embodiment.
- the sealed terminal device 10 includes a terminal holder 12, and the terminal holder 12 includes holder halves 14 and 16.
- the holder halves 14 and 16 each have a triangular shape and are formed of an electrically insulating material such as ceramic or synthetic resin.
- the material for forming the holder halves 14 and 16 is a synthetic resin.
- the holder halves 14, 16 are arranged with the housing wall 2a interposed therebetween. Specifically, the holder half 14 is arranged on the electric motor 6 side, that is, inside the housing wall 2a, whereas the holder half 16 is arranged outside the housing wall 2a.
- the sealing terminal device 10 further includes a plurality of, for example, three sealing terminals 18, and these sealing terminals 18 also function as fastening bolts for fastening the terminal holder 12, that is, the holder halves 14, 16 to the housing wall 2a. To do.
- each sealing terminal 18 is also made of a rod member, and has a screw 20 at one end and a flange 22 at the other end, and between this flange 22 and the other end of the sealing terminal 18. In A certain length is secured.
- One end of each sealing terminal 18 is formed as an outer terminal end, while the other end is formed as an inner terminal end.
- three through holes 24 are formed in the terminal holder 12, and these through holes 24 are arranged at equal intervals in the circumferential direction of the terminal holder 12. Specifically, the three through-holes 24 are respectively installed at the corners of the triangular holder halves 14 and 16 and pass through the holder halves. Each through hole 24 has a recess 26, and this recess 26 is formed on the inner end surface of the holder half 14. The recess 26 is larger in diameter than the through hole 24 and can receive the flange 22 of the sealing terminal 18 therein.
- three through holes 28 are formed in the housing wall 2a. These through holes 28 are arranged corresponding to the through holes 24 of the terminal holder 12, and have an inner diameter larger than the inner diameter of the through hole 24.
- the terminal holder 12 is arranged with respect to the housing wall 2a so that the housing wall 2a is sandwiched between the holder halves 14 and 16, and each sealing terminal 18 is inserted into the housing holder 2a.
- the holder half 14 side force is also inserted through the corresponding through hole 24 and through hole 28.
- the insertion of the sealing terminal 18 is stopped when the flange 22 comes into contact with the bottom of the corresponding recess 26, and at this time, the screw 20 protrudes from the outer end surface of the holder half 16.
- each sealed terminal 18 In the mounted state of the terminal holder 12, the inner terminal end of each sealed terminal 18 also projects the inner end surface force of the terminal holder 12, whereas the outer terminal end, that is, the screw 20, is outside the terminal holder 12. The end face force also protrudes.
- the inner terminal end is electrically connected to the electric motor 6 via a lead (not shown), while the screw 20 is electrically connected to the control board 8 described above via a lead (not shown).
- the holder half 14 has a contact surface that contacts the housing wall 2a, and an annular groove 31 is formed on the contact surface.
- This annular groove 31 has the above-mentioned three
- the hole 24 has a size surrounding the through hole 24 from the outside, and extends along the outer peripheral edge of the holder half 14.
- An O-ring 32 is accommodated in the annular groove 31, and this O-ring 32 hermetically seals between the holder half 14 and the housing wall 2a.
- annular groove 33 is also formed at the bottom of each recess 26, and the annular groove 33 surrounds the corresponding sealed terminal 18.
- O-rings 34 are respectively accommodated in these annular grooves, and each O-ring 34 is pressed against the bottom and inner peripheral wall of the annular groove 33 by the flange 22 of the sealing terminal 18, and the corresponding sealing terminal 18 and the holder half 14. Airtightly seal between. Therefore, when the electric compressor is used for compressing the refrigerant in the refrigeration circuit, the refrigerant does not leak out of the housing 2 through the sealed terminal device 10.
- each of the through holes 28 in the housing wall 2a is provided with an absolute & rib 36, and this absolute 36 is positioned between the through hole 2 and the corresponding sealing terminal 18.
- the electrical connection between the sealing terminal 18 and the housing wall 2a is interrupted.
- the terminal holder 12 further includes three cavities 38 corresponding to the respective sealed terminals 18. These cavities 38 are recesses formed in the surface of the holder half 16 that contacts the housing wall 2a, and are positioned adjacent to the housing wall 2a.
- three grooves 40 are formed on the outer end surface of the holder half 16, and these grooves 40 are sealed terminals 18 adjacent in the circumferential direction of the terminal holder 12.
- the holder half 16 extends in the radial direction to the outer peripheral surface of the holder half 16, and gathers at the center of the holder half 16. That is, the three grooves 40 are Y-shaped.
- the alternate long and short dash line indicates the axis of the sealed terminal 18.
- the groove 40 described above has a creepage distance between adjacent sealing terminals 18.
- the cavity 38 described above also increases the edge distance between the sealing terminal 18 and the housing wall 2a and the edge distance between the adjacent sealing terminals 18 so that the sealing terminal 18 and the housing wall 2a And the degree of electrical insulation between the sealed terminals 18 is further increased. As a result, the distance between the sealing terminals 18 can be shortened without lowering the electrical insulation between the sealing terminals 18, and the sealing terminal device 10 can be downsized.
- the sealed terminal devices of the second and third embodiments will be described below.
- the same reference numerals are given to members and portions that exhibit the same functions as the members and portions of the first embodiment, and the description thereof is omitted.
- FIG. 6 shows a sealed terminal device according to a second embodiment.
- FIG. 6 does not show a single sealed terminal 18, the apparatus of the second embodiment also has three sealed terminals 18.
- each sealed terminal 18 has an electrically insulating layer 42 on its outer surface.
- This electrical insulating layer 42 covers the outer surface of the sealing terminal 18 at both ends of the sealing terminal 18, that is, in the region A in FIG. 6 excluding the inner terminal end and the outer terminal end described above.
- Such an electrical insulating layer 42 can be formed by, for example, an insulating varnish applied to the region A of the sealed terminal 18.
- the electrical insulating layer 42 can be formed by an acid aluminum coating obtained by anodizing the A region of the sealing terminal 18.
- FIG. 6 shows the connection between the connector 44 of the lead 6a extending from the electric motor 6 and the inner terminal end of the sealing terminal 18, and between the lead 8a from the control board 8 and the outer terminal end of the sealing terminal 18. Connections are also shown.
- the connector 44 receives the inner terminal end of the sealing terminal 18, it overlaps the electrically insulating layer 42, and the lead 8 a is sandwiched between the nut 30 and the connector nut 46 described above.
- the above-described electrical insulation layer 42 functions as an electrical insulation barrier positioned between adjacent sealed terminals 18 and increases the degree of electrical insulation between the sealed terminals 18. Further, when the electric compressor is used for compressing the refrigerant in the refrigeration circuit, the electrical insulating layer 42 prevents linear contact between the outer surface of the sealing terminal 18 and the refrigerant. Therefore, the electrical insulation of the sealed terminal device, in which short circuits between the sealed terminals 18 and between the sealed terminals 18 and the housing wall 2a do not occur via the refrigerant, is greatly improved.
- the sealed terminal 18 of the third embodiment further includes a detent mechanism for the sealed terminal 18 as well as the electrical insulating layer 42 described above.
- the anti-rotation mechanism is realized by forming the flange 22 of the sealed terminal 18 into a hexagonal shape and forming the recess 26 of the communication hole 24 into an oval shape!
- the maximum diameter D of the flange 22 is the short axis direction of the recess 26.
- the recess 26 larger than the width W has two flat inner wall surfaces 26a along the major axis, and these inner wall surfaces 26a form a staggered surface that prevents the sealing terminal 18 from rotating.
- the present invention can be variously modified without being limited to the first to third embodiments described above.
- the O-ring 32 and the cavity 38 may be provided in each of the holder halves 14 and 16.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/307,117 US8454329B2 (en) | 2006-07-11 | 2007-06-25 | Sealed terminal device for motor-driven compressor |
EP07767515.5A EP2039932B1 (en) | 2006-07-11 | 2007-06-25 | Sealed terminal device for electric compressor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006190200A JP5291285B2 (ja) | 2006-07-11 | 2006-07-11 | 電動圧縮機の密封端子装置 |
JP2006-190200 | 2006-07-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008007534A1 true WO2008007534A1 (fr) | 2008-01-17 |
Family
ID=38923099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/062709 WO2008007534A1 (fr) | 2006-07-11 | 2007-06-25 | dispositif terminal hermétique pour compresseur électrique |
Country Status (5)
Country | Link |
---|---|
US (1) | US8454329B2 (ja) |
EP (1) | EP2039932B1 (ja) |
JP (1) | JP5291285B2 (ja) |
CN (1) | CN101490416A (ja) |
WO (1) | WO2008007534A1 (ja) |
Cited By (4)
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CN101888150A (zh) * | 2009-05-15 | 2010-11-17 | 株式会社神户制钢所 | 马达及具备它的压缩机 |
US20120045353A1 (en) * | 2009-09-24 | 2012-02-23 | Mitsubishi Heavy Industries, Ltd. | Inverter-integrated electric compressor |
WO2015014231A1 (zh) * | 2013-07-31 | 2015-02-05 | 珠海格力电器股份有限公司 | 接线机构、永磁调速电机及离心式制冷压缩机 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101764382A (zh) * | 2008-12-25 | 2010-06-30 | 乐金电子(天津)电器有限公司 | 压缩机的电源接线盒 |
CN101888150A (zh) * | 2009-05-15 | 2010-11-17 | 株式会社神户制钢所 | 马达及具备它的压缩机 |
US20120045353A1 (en) * | 2009-09-24 | 2012-02-23 | Mitsubishi Heavy Industries, Ltd. | Inverter-integrated electric compressor |
US9157425B2 (en) * | 2009-09-24 | 2015-10-13 | Mitsubishi Heavy Industries, Ltd. | Inverter-integrated electric compressor |
WO2015014231A1 (zh) * | 2013-07-31 | 2015-02-05 | 珠海格力电器股份有限公司 | 接线机构、永磁调速电机及离心式制冷压缩机 |
US9831741B2 (en) | 2013-07-31 | 2017-11-28 | Gree Electrical Appliances, Inc. Of Zhuhai | Terminal mechanism, permanent magnet adjustable-speed motor and centrifugal refrigeration compressor |
Also Published As
Publication number | Publication date |
---|---|
JP5291285B2 (ja) | 2013-09-18 |
US8454329B2 (en) | 2013-06-04 |
US20090315417A1 (en) | 2009-12-24 |
EP2039932B1 (en) | 2016-05-04 |
EP2039932A1 (en) | 2009-03-25 |
JP2008019732A (ja) | 2008-01-31 |
EP2039932A4 (en) | 2009-07-22 |
CN101490416A (zh) | 2009-07-22 |
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