EP2816232B1 - Electric compressor and method for manufacturing electric compressor - Google Patents

Electric compressor and method for manufacturing electric compressor Download PDF

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Publication number
EP2816232B1
EP2816232B1 EP13749902.6A EP13749902A EP2816232B1 EP 2816232 B1 EP2816232 B1 EP 2816232B1 EP 13749902 A EP13749902 A EP 13749902A EP 2816232 B1 EP2816232 B1 EP 2816232B1
Authority
EP
European Patent Office
Prior art keywords
housing
external surface
protrusions
protection member
terminal guard
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.)
Active
Application number
EP13749902.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2816232A1 (en
EP2816232A4 (en
Inventor
Yogo Takasu
Hisao Mizuno
Yoshiyuki Kimata
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.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP2816232A1 publication Critical patent/EP2816232A1/en
Publication of EP2816232A4 publication Critical patent/EP2816232A4/en
Application granted granted Critical
Publication of EP2816232B1 publication Critical patent/EP2816232B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • 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
    • F04B39/14—Provisions for readily assembling or disassembling

Definitions

  • the present invention relates to an electric compressor provided with a compressing section that compresses refrigerant gas and a motor that drives the compressing section, and to a manufacturing method of an electric compressor.
  • a compressor and a motor that drives the compressor are accommodated in a metallic housing.
  • refrigerant gas in the interior thereof is compressed and discharged.
  • the metallic housing possesses airtightness, and the power for the motor is supplied to the motor from an external power supply part via electric terminals provided at an opening of the housing.
  • Patent Literature 1 discloses an invention related to a terminal protection cover of an electric compressor, which shows a technology useful to omit processing work and to make its manufacturing process easier.
  • Japanese Examined Utility Model Application, Publication No. S49-23291 JP09-158835 discloses an hermetic type compressor.
  • a sealing surface where the terminal guard and the external surface of the housing come into contact is formed in a flat shape.
  • machining, for example, press processing or the like is performed for forming the flat shape on the housing having a cylindrical shape or a spherical shape.
  • the installation direction of the terminal guard is such that the terminal guard is moved and mounted toward the center of the housing (in the normal direction of the external surface of the housing). Accordingly, securing bolts are employed and, in general, the securing bolts are inserted toward the housing from outside the terminal guard. This is why portions of the securing bolts end up penetrating into the interior of the housing.
  • the present invention is made in light of the above-described circumstances, and an object thereof is to provide an electric compressor with which the need to process an external surface of a housing can be eliminated, making it possible to reduce the time and labor involved in processing, and with which a protection member can easily be mounted to the external surface of the housing, and to provide a manufacturing method of an electric compressor.
  • An electric compressor is defined by claim 1 and comprises: a housing having a curved external surface; an electric terminal provided at the external surface of the housing; a pin-like protrusion that protrudes from the external surface of the housing in a normal direction of the external surface; and a protection member that has an aperture which corresponds to the position and a protruding direction of the protrusion, and that surrounds the electric terminal in a state in which the protrusion is inserted into the aperture.
  • the pin-like protrusion is provided so as to protrude in the normal direction of the external surface from the curved external surface of the housing, and the aperture of the protection member is formed in correspondence with the position and the protruding direction of the protrusion. Then, by inserting the protrusion into the aperture of the protection member, the protection member is mounted to the housing and surrounds the electric terminal located at the external surface of the housing. Therefore, because the protection member can be mounted at the portion of the housing to which the protection member is mounted without forming a flat portion at the external surface, leaving the curved surface as it is, time and labor for the processing can be reduced.
  • two of the protrusions may be arranged in the circumferential direction of the external surface, and the aperture corresponding to the two protrusions may be cut out to open in a lateral direction of the protection member.
  • the two protrusions are arranged in the circumferential direction of the external surface of the housing and these protrusions protrude in the normal directions of the curved surface, the two protrusions spread out in an inverted V-shape when viewed in the axial direction of the curved surface. Also, because the aperture of the protection member is cut out in the lateral direction, insertion of the protrusions into the aperture of the protection member is facilitated.
  • the first aspect of the present invention may be further provided with a sealing member that is installed between the external surface of the housing and the protection member, wherein the protrusions include two first protrusions arranged in the circumferential direction of the external surface and one second protrusion that is provided at a position apart in an axial direction of the external surface with respect to the first protrusions, and two first apertures are formed in the sealing member so that the first apertures individually correspond to one of the first protrusions and the second protrusion and that the sealing member is supported by the two positions.
  • the two first apertures are formed in the sealing member, and the sealing member is supported at two positions by the first protrusion and the second protrusion that are inserted into the first apertures. Accordingly, when mounting the sealing member to the housing, the sealing member is reliably positioned with respect to the external surface of the housing.
  • the protection member in a case in which a protruding direction of the electric terminal is inclined with respect to a straight portion of a base portion to which the housing is installed, the protection member has an external surface in which a surface is configured to be parallel to the straight portion of the base portion when the protection member is mounted on the housing.
  • the protection member when the protection member is mounted to the housing, the protection member has the external surface that is parallel to the straight portion of the base portion on which the housing is installed. Accordingly, the straight portion of the base portion and the external surface of the protection member become parallel to each other. Therefore, even in the case in which the protruding direction of the electric terminals is inclined with respect to the straight portion of the base portion, the protection member can appropriately be positioned inside the base portion.
  • a manufacturing method of an electric compressor according to a second aspect of the present invention is defined by claim 4 and is a manufacturing method of an electric compressor, the electric compressor comprising: a housing; an electric terminal provided at an external surface of the housing; a pin-like protrusion that protrudes from the external surface of the housing; a protection member that surrounds the electric terminal in a state in which the protrusion is inserted into the aperture; and a sealing member that is installed between the external surface of the housing and the protection member, the manufacturing method comprising: a step of providing two of the protrusions arranged in a circumferential direction of the external surface; a step of providing apertures, corresponding to the positions and the protruding directions of the two protrusions, cut out to open in a lateral direction of the protection member; a step of inserting the protrusion through the sealing member; a step of wrapping a noise insulation member on the external surface of the housing after inserting the protrusion through the sealing member; a step of connecting a cable to the electric terminal of
  • the need to process an external surface of a housing can be eliminated, making it possible to reduce time and labor involved in processing, and a protection member can easily be mounted to the external surface of the housing.
  • an electric compressor 1 a compressor, a motor that drives the compressor, and so forth are accommodated in a metallic housing 2.
  • a compressor By operating the compressor, refrigerant gas in the interior thereof is compressed and discharged.
  • the metallic housing 2 possesses airtightness, and the power for the motor is supplied to the motor from a power source located at the exterior of the housing 2 via electric terminals 3 located in an aperture of the housing 2.
  • the housing 2 has, for example, a cylindrical shape in the cross section.
  • the axial direction of the cylindrical shape corresponds to the top-to-bottom direction of the electric compressor 1 when the electric compressor 1 is installed.
  • the electric terminals 3 protrude outward from the external surface of the housing 2.
  • the protruding direction of the electric terminals 3 is, for example, the radial direction of the cylindrical shape of the housing 2, that is, the normal direction of the external surface of the cylindrical shape.
  • the electric terminals 3 are connected to cables (not shown). The cables supply power from the external power source to the motor of the electric compressor 1.
  • the external surface of the housing 2 of the electric compressor 1 is provided with a terminal guard 5, with a gasket 6 interposed therebetween.
  • bolts 4a, 4b, and 4c are provided on the external surface of the housing 2.
  • the bolts 4a, 4b, and 4c are examples of pin-like protrusions, and protrude outward from the external surface of the housing 2, as shown in Figs. 4 and 5 .
  • the bolts 4a, 4b, and 4c are mounted on curved portions without processing the external surface of the housing 2 into a flat shape.
  • the protruding directions of the bolts 4a, 4b, and 4c are, for example, the radial directions of the cylindrical shape of the housing 2, that is, the normal directions of the external surface of the cylindrical shape.
  • the terminal guard 5 is an example of a protection member and accommodates the electric terminals 3 in the interior thereof by surrounding the electric terminals 3, as shown in Fig. 5 .
  • apertures 7a, 7b, and 8, which correspond to the positions and protruding directions of the bolts 4a, 4b, and 4c, are formed in the terminal guard 5.
  • a surface 5A of the terminal guard 5, which faces the housing 2 when the terminal guard 5 is installed on the external surface of the housing 2 matches the shape of the external surface of the housing 2.
  • the cross-section of the surface 5A of the terminal guard 5 has a circular arc shape that has a common axial center O with the housing 2.
  • the gasket 6 is an example of a sealing member and is installed between the terminal guard 5 and the external surface of the housing 2, as shown in Figs. 1 , 2 , and 5 .
  • the gasket 6 is made of, for example, rubber, and ensures waterproofing between the terminal guard 5 and the external surface of the housing 2.
  • the pin-like bolts 4a, 4b, and 4c are provided at the external surface of the housing 2 having the cylindrical shape, so as to protrude in the normal directions of the external surface, and the apertures 7a, 7b, and 8 of the terminal guard 5 are formed in correspondence with the positions and protruding directions of the bolts 4a, 4b, and 4c.
  • the terminal guard 5 is mounted to the housing 2 by inserting the bolts 4a, 4b, and 4c into the apertures 7a, 7b, and 8 of the terminal guard 5, and the electric terminals 3 provided at the external surface of the housing 2 are surrounded by the terminal guard 5 and are accommodated in the terminal guard 3.
  • the bolts 4a, 4b, and 4c are mounted to the external surface of the cylindrical shape without any modification of the shape of the external surface, and since a flat portion is not formed at the portion of the external surface of the housing 2 where the terminal guard 5 is mounted and the curved surface thereof is left as it is, and because it is possible to mount the terminal guard 5 in this state, it is possible to reduce the time and labor for processing.
  • the bolt 4a and the bolt 4b are installed on the same circumference line on the external surface of the housing 2.
  • the bolt 4a and the bolt 4b are examples of first protrusions.
  • the bolt 4c is provided away from the bolt 4a and the bolt 4b in the axial direction of the housing 2.
  • the bolt 4c is an example of a second protrusion.
  • the bolt 4c is installed between the bolt 4a and the bolt 4b in the circumferential direction, and above the bolt 4a and the bolt 4b in the housing 2.
  • the apertures 7a, 7b, and 8 are formed. As shown in Figs. 7 and 8 , the apertures 7a and 7b have shapes formed by cutting out the terminal guard 5 to open in the lateral direction.
  • the aperture 8 is provided on the center axis of the terminal guard 5 and has a circular shape.
  • the terminal guard 5 has an open portion at the bottom portion that is opposite from the aperture 8 at the top portion, and the cables connected to the electric terminals 3 are installed so as to pass through this open portion of the terminal guard 5.
  • the bolt 4a and the bolt 4b are installed on the same circumference line on the external surface of the housing 2 and protrude in the normal directions of the cylindrical shape. Accordingly, as shown in Figs. 5 and 6 , the bolt 4a and the bolt 4b are spread out in an inverted V-shape when viewed in the axial direction of the housing 2. Specifically, the space between the tip of the bolt 4a and the tip of the bolt 4b is greater than the space between the proximal portion of the bolt 4a and the proximal portion of the bolt 4b.
  • the installation direction of the terminal guard 5 is such that the terminal guard 5 is moved and mounted toward the center of the housing 2 (in the normal direction of the external surface of the housing 2). Accordingly, it is not possible to mount the terminal guard 5 if the apertures 7a and 7b of the terminal guard 5 have, for example, a perfectly circular shape. In this embodiment, because the apertures 7a and 7b of the terminal guard 5 are cut out to open in the lateral direction, insertion of the bolts 4a and 4b into the apertures 7a and 7b of the terminal guard 5 is facilitated. Note that the apertures 7a and 7b may have elongated circular shapes that are elongated in the lateral direction.
  • apertures 11a, 11b, 12, and 13 are formed in the gasket 6.
  • the aperture 11a corresponds to the bolt 4a, and which is cut out to open in the lateral direction. Accordingly, as with the terminal guard 5, the gasket 6 can be mounted to the bolt 4a and the bolt 4b installed to extend in the normal directions of the external surface of the housing 2. Specifically, because the aperture 11a is cut out to open in the lateral direction, insertion of the gasket 6 at the external surface of the housing 2 is facilitated.
  • the aperture 11b corresponds to the bolt 4b and has a circular shape.
  • the aperture 12 corresponds to the bolt 4c, and which is cut out to open to the aperture 13.
  • the aperture 13 has a circular shape that surrounds the electric terminals 3.
  • the aperture 11b and the aperture 12 are examples of first apertures.
  • the gasket 6 when mounting the gasket 6 to the external surface of the housing 2, first, the bolt 4b is inserted into the aperture 11b and the aperture 12 is hooked on the bolt 4c. By doing so, because the gasket 6 is supported at two points by the bolt 4b and the bolt 4c, the gasket 6 is reliably positioned with respect to the external surface of the housing 2. Accordingly, in the subsequent steps, for example, in a step of wrapping the external surface of the housing 2 with a noise insulation member (not shown), the work is facilitated at a portion where the noise insulation member and the gasket 6 come together.
  • a leg portion 2A of the housing 2 of the electric compressor 1 is installed on the base portion 10. Also, in the case in which a protruding direction E of the electric terminals 3 is not orthogonal to a straight portion L of the base portion 10 but is inclined with respect to the straight portion L, an external surface 5B of the terminal guard 5 is a surface that is parallel to the straight portion L of the base portion 10 when the terminal guard 5 is mounted to the housing 2.
  • the straight portion L of the base portion 10 and the external surface 5B of the terminal guard 5 become parallel to each other. Therefore, even in the case in which the protruding direction E of the electric terminals 3 is not perpendicular to the straight portion L of the base portion 10 but is inclined with the straight portion L, the terminal guard 5 can appropriately be contained with respect to the base portion 10.
  • the gasket 6 is placed so that the bolts 4a, 4b, and 4c pass therethrough. Subsequently, the external surface of the housing 2 is wrapped with the noise insulation member (not shown).
  • the noise insulation member is made of, for example, felt.
  • cables (not shown) are connected to the electric terminals 3 of the housing 2 that has been wrapped with the noise insulation member.
  • the terminal guard 5 is mounted to the external surface of the housing 2 in which the cables have been connected to the electric terminals 3. The terminal guard 5 is secured by using nuts fitted to the bolts 4a, 4b, and 4c.
  • the external surface of the housing 2 is wrapped with the noise insulation member, and, furthermore, the cables are connected to the electric terminals 3.
  • the terminal guard 5 is subsequently mounted to the external surface of the housing 2. Therefore, because the noise insulation member is installed after the gasket 6 is positioned, processing work can be facilitated at the portion where the gasket 6 and the noise insulation member come together. Accordingly, because the gasket 6 can reliably be mounted, mounting of the terminal guard 5 is also facilitated.
  • this mounting method is not limited to the terminal guard 5 and the external surface of the housing 2 of this embodiment described above.
  • mounting in the same manner is possible even in the case in which, at a portion to which the terminal guard is mounted, the external surface of the housing is formed in a flat shape with bolts protruding from the external surface of the housing, as in a common compressor.
  • the same operational advantages as this mounting method are afforded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
EP13749902.6A 2012-02-15 2013-01-10 Electric compressor and method for manufacturing electric compressor Active EP2816232B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012030776A JP5863496B2 (ja) 2012-02-15 2012-02-15 電動圧縮機及び電動圧縮機の製造方法
PCT/JP2013/050253 WO2013121808A1 (ja) 2012-02-15 2013-01-10 電動圧縮機及び電動圧縮機の製造方法

Publications (3)

Publication Number Publication Date
EP2816232A1 EP2816232A1 (en) 2014-12-24
EP2816232A4 EP2816232A4 (en) 2015-12-16
EP2816232B1 true EP2816232B1 (en) 2018-09-26

Family

ID=48983936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13749902.6A Active EP2816232B1 (en) 2012-02-15 2013-01-10 Electric compressor and method for manufacturing electric compressor

Country Status (4)

Country Link
EP (1) EP2816232B1 (ja)
JP (1) JP5863496B2 (ja)
CN (1) CN103998782B (ja)
WO (1) WO2013121808A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3489513B1 (en) * 2016-07-29 2021-10-20 Daikin Industries, Ltd. Compressor assembly, compressor, and compressor production method
JP2019021570A (ja) * 2017-07-20 2019-02-07 三菱重工サーマルシステムズ株式会社 ハーメチック端子、ターミナルブロック、ハーメチック端子ユニットおよび圧縮機

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923291Y1 (ja) 1970-04-10 1974-06-22
JPH01159476A (ja) * 1987-09-18 1989-06-22 Mitsubishi Electric Corp 圧縮機の防音装置
JPH09158835A (ja) * 1995-12-11 1997-06-17 Toshiba Corp 密閉型圧縮機
JP3727459B2 (ja) * 1997-11-28 2005-12-14 東芝キヤリア株式会社 密閉形圧縮機
JP4390533B2 (ja) * 2003-03-10 2009-12-24 三洋電機株式会社 圧縮機のターミナル保護装置
JP5232549B2 (ja) * 2008-07-02 2013-07-10 三洋電機株式会社 電動圧縮機のターミナル保護部材

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN103998782A (zh) 2014-08-20
EP2816232A1 (en) 2014-12-24
JP5863496B2 (ja) 2016-02-16
JP2013167202A (ja) 2013-08-29
CN103998782B (zh) 2016-08-24
EP2816232A4 (en) 2015-12-16
WO2013121808A1 (ja) 2013-08-22

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