WO2020179404A1 - Electric compressor - Google Patents

Electric compressor Download PDF

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Publication number
WO2020179404A1
WO2020179404A1 PCT/JP2020/005717 JP2020005717W WO2020179404A1 WO 2020179404 A1 WO2020179404 A1 WO 2020179404A1 JP 2020005717 W JP2020005717 W JP 2020005717W WO 2020179404 A1 WO2020179404 A1 WO 2020179404A1
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WO
WIPO (PCT)
Prior art keywords
inverter
damping material
cover
housing
bolt
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Application number
PCT/JP2020/005717
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French (fr)
Japanese (ja)
Inventor
田口　正則
寛 板垣
敬史 阿久津
Original Assignee
サンデン・オートモーティブコンポーネント株式会社
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Application filed by サンデン・オートモーティブコンポーネント株式会社 filed Critical サンデン・オートモーティブコンポーネント株式会社
Publication of WO2020179404A1 publication Critical patent/WO2020179404A1/en

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    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the present invention relates to a so-called inverter-integrated electric compressor in which an inverter is housed in an inverter accommodating portion formed in a housing.
  • an inverter inverter device
  • an inverter accommodating portion formed in a metal housing (accommodating portion main body), and the inverter accommodating portion is made of metal. It was blocked by the cover of.
  • the peripheral edge is fixed with bolts, but in order to vibrate and generate noise during operation, conventionally, the support column for fixing the board is extended to the vicinity of the cover, and it is controlled between this support column and the cover.
  • the vibration is damped by sandwiching the vibration material (for example, refer to Patent Document 1).
  • a strut structure for arranging the damping material between the cover and the housing must be formed. Further, if the vibration damping material is directly interposed between the substrate and the cover without adopting such a strut structure, stress may be applied to the substrate and the substrate may be damaged.
  • the present invention has been made to solve the conventional technical problems, and the damping material for damping the vibration of the cover of the inverter accommodating portion is not formed on the housing side with a special structure. Moreover, it is an object of the present invention to provide an electric compressor which can be arranged without adversely affecting a substrate.
  • the electric compressor of the present invention includes a metal housing in which a motor is built, an inverter for driving the motor, an inverter accommodating portion in which the inverter is accommodated, and an inverter accommodating portion fixed to the housing. It is equipped with a metal cover that closes the part, and the inverter has a board on which circuit elements are mounted, and this board is attached to the housing by bolts, and between the bolt and the cover, It is characterized in that a damping material is arranged.
  • the bolt has a grooved head, the damping material abuts on the head of the bolt, and the damping material avoids the groove. It is characterized in that a portion is formed.
  • the electric compressor according to the invention of claim 3 is characterized in that, in each of the above inventions, the damping material is arranged so as to surround the bolt.
  • the cover is integrally formed with a protruding portion that protrudes toward the substrate at a position corresponding to the bolt, and the damping material is provided on the protruding portion of the cover. It is characterized by abutting.
  • the electric compressor according to the invention of claim 5 is characterized in that, in each of the above inventions, the damping material is composed of an elastic material having an insulating property.
  • the electric compressor according to the invention of claim 6 is characterized in that, in each of the above inventions, the damping material is made of an elastic material having a hardness of 60 or more.
  • An electric compressor according to a seventh aspect of the present invention is characterized in that, in each of the above inventions, the cover is fixed to the housing at the peripheral edge portion, and the damping material is in contact with the cover at a position separated from the peripheral edge portion. To do.
  • a metal housing having a built-in motor, an inverter for driving the motor, an inverter accommodating portion composed of the housing and accommodating the inverter, and an inverter accommodating portion fixed to the housing are provided.
  • an inverter has a board on which circuit elements are mounted, and this board is attached to a housing by bolts, and a vibration damping device is provided between the bolts and the cover. Since the material is arranged, it is possible to reduce the noise by interposing the damping material between the bolt and the cover and dampening the vibration of the cover without forming a special structure on the housing side.
  • the damping material can be received by the bolts for fixing the inverter board to the housing, it is possible to avoid the inconvenience that the load of the cover is applied to the board and the board is damaged.
  • the damping material is arranged so as to surround the bolt as in the invention of claim 3, the damping material can be positioned by using the bolt, and the assembly workability is improved. improves.
  • a protruding portion protruding toward the substrate is integrally formed on the cover at a position corresponding to the bolt, and the damping material is brought into contact with the protruding portion of the cover to cause the damping material.
  • the vibration damping material is made of an elastic material having an insulating property as in the invention of claim 5, the insulating property between the substrate and the cover is secured.
  • the damping material with an elastic material having a hardness of 60 or more as in the invention of claim 6, it becomes possible to exert a sufficient vibration damping effect on the cover.
  • the vibration of the cover can be suppressed by bringing the damping material into contact with the cover at a position separated from the peripheral portion as in the invention of claim 7.
  • the material can be effectively damped.
  • FIG. 1 is a schematic vertical sectional side view of an electric compressor according to an embodiment of the present invention. It is the top view which looked at the electric compressor of FIG. 1 in the state which removed the cover from the inverter accommodating part side. It is an expanded vertical side view of the part of the inverter accommodating part of the electric compressor of FIG. FIG. 4 is an enlarged vertical sectional view of a damping material portion of the inverter accommodating portion of FIG. 3.
  • FIG. 1 is a schematic longitudinal side view of an electric compressor 1 of an embodiment to which the present invention is applied
  • FIG. 2 is a plan view of the inverter accommodating portion 8 with the cover 11 of the electric compressor 1 removed
  • FIG. FIG. 3 is an enlarged vertical side view of an inverter housing portion 8 of the electric compressor 1.
  • the electric compressor 1 of the embodiment is a so-called inverter-integrated electric compressor, and constitutes a part of a refrigerant circuit of a vehicle air conditioner that air-conditions the interior of a vehicle (not shown).
  • the electric compressor 1 includes a motor 6, a metal housing 2 having a compression mechanism 7 that is driven by a rotary shaft 5 of the motor 6, and an inverter 10 that drives the motor 6.
  • Reference numeral 10 denotes an inverter circuit unit 3 for controlling control and a filter circuit unit 4 for absorbing a high frequency component of the switching current.
  • an inverter accommodating portion 8 is formed at one end side in the axial direction of the rotary shaft 5 of the motor 6, and the opening 9 of the inverter accommodating portion 8 is the same as the housing 2.
  • the metal cover 11 of FIG. The inverter circuit unit 3 and the filter circuit unit 4 constituting the inverter 10 are housed in the inverter housing unit 8, and are configured to be detachably attached to the housing 2.
  • the electric compressor 1 of the embodiment is shown with the inverter accommodating portion 8 facing up, but in reality, the inverter accommodating portion 8 is arranged in the horizontal direction so as to be on one side. is there.
  • the motor 6 of the embodiment is composed of a three-phase synchronous motor (brushless DC motor), and the compression mechanism 7 is, for example, a scroll type compression mechanism.
  • the compression mechanism 7 is driven by the rotating shaft 5 of the motor 6 to compress the refrigerant and discharge it into the refrigerant circuit. Then, a low-temperature gas refrigerant sucked from an evaporator (also referred to as a heat absorber), which also constitutes a part of the refrigerant circuit, is circulated in the housing 2. Therefore, the inside of the housing 2 is cooled.
  • the inverter accommodating portion 8 is partitioned from the inside of the housing 2 in which the motor 6 is accommodated by a partition wall 12 which is the bottom surface of the inverter accommodating portion 8, and the partition wall 12 is also cooled by a low temperature gas refrigerant.
  • a power module 14 in which six power switching elements 13 (IGBTs in the embodiment) that form an arm of each phase of a three-phase inverter circuit are mounted, and a control circuit 16 as a circuit element.
  • the inverter circuit unit 3 converts DC power supplied from a vehicle battery (not shown) into three-phase AC power and supplies power to the stator coil 27 of the motor 6. Therefore, the connection points between the power switching element 13 on the upper arm side and the power switching element 13 on the lower arm side of each phase are on the three motor sides at the extraction terminals 24, 25, and 26 drawn from the partition wall 12 of the housing 2.
  • the power supply terminal and the ground terminal are the filter circuit unit 4, the power supply side connection terminal 31 provided at the tip of each of the two wires 98 drawn from the high power connector 29 described above, and the high power connector. It is electrically connected to the power supply harness via 29 or the like.
  • the above-described terminal connecting portions 19, 20, 21, 22, 23 are provided on the sleeve assembly 18 of the embodiment in a protruding manner, and the sleeve assembly 18 further has six sleeves 32.
  • the sleeve 32 is made of a metal cylinder having a predetermined length, and the terminal connection portions 19 to 23 and the sleeve 32 are integrally molded with the sleeve assembly 18 by an insulating hard resin.
  • Each of the sleeves 32 is arranged in the peripheral portion of the sleeve assembly 18, and the upper and lower ends thereof are exposed and opened on the front and back surfaces of the sleeve assembly 18, and bolts 36 (36A) for fixing to the housing 2 described later can be inserted therein.
  • the filter circuit unit 4 includes circuit elements such as a relatively large smoothing capacitor 63 connected between the power supply terminal and the installation terminal of the three-phase inverter circuit and a relatively large coil 64 connected to the power supply terminal. It is composed of a mounted filter circuit board (board) 66 and a support member 67 made of hard resin for accommodating these capacitors 63 and coils 64 (circuit elements).
  • the support member 67 has an opening on one side and has a container (case) shape having a depth dimension sufficient for accommodating the large smoothing capacitor 63 and the coil 64 as described above, and is formed in a peripheral portion of the support member 67.
  • Has five sleeves 68 each having a predetermined length and made of a metal cylinder, which are integrally molded with the supporting member 67 by an insulating hard resin, and are exposed and opened on the front surface and the back surface of the supporting member 67.
  • two bag-shaped metal nut members 69 for connecting the power supply side connection terminals 31 with the bolts 93 are similarly resin-molded integrally with the support member 67 to form a support member. It is exposed and open on the surface of 67.
  • Two filter-side connection terminals 71 are also integrally resin-molded on the other end of the support member 67.
  • Such an inverter circuit unit 3 and a filter circuit unit 4 are attached to the housing 2 by a plurality of bolts 36 and 36A (10 in the embodiment).
  • the inverter circuit portion 3 and the filter circuit portion 4 are housed in the inverter housing portion 8 of the housing 2, respectively.
  • the bolts 36 and 36A are inserted into the insertion holes (not shown) of the inverter circuit unit 3 and the insertion holes (not shown) of the filter circuit unit 4, respectively, and screwed into the screw holes 83 and 86 of the housing 2 to be fastened.
  • the inverter circuit unit 3 and the filter circuit unit 4 of the inverter 10 are detachably attached to the housing 2.
  • the bolt 36A (the bolt surrounded by the vibration damping material 39 described later shown by the broken line in FIGS. 1 and 2) located near the center of the inverter 10 is connected to the inverter control board 17 of the inverter circuit unit 3 of the inverter 10.
  • the filter circuit board 66 of the filter circuit unit 4 is attached to the housing 2 by tightening together (FIG. 3). Further, in this state, the terminal connection portions 19, 20, and 21 of the inverter circuit unit 3 are adjacent to the drawer terminals 24, 25, and 26, respectively.
  • each motor-side connection terminal 28 is electrically connected to each of the drawer terminals 24 to 26 by pressure contact.
  • the terminal connection portions 19, 20 and 21 are inserted into the other end of the motor side connection terminal 28, and the drawer terminal 24 and the terminal connection portion 19, the drawer terminal 25 and the terminal connection portion 20, and the drawer terminal 26 and the terminal are inserted with nuts.
  • the motor-side connection terminals 28 are attached across the connection portions 21.
  • each motor side connection terminal 28 is fastened to each terminal connection portion 19 to 21 via the inverter control board 17.
  • each motor side connection terminal 28 is fixed to the inverter control board 17 and electrically connected, and the extraction terminals 24 to 26 from the motor 6 are electrically connected to the inverter control board 17 by the motor side connection terminal 28. Connect to.
  • a plurality of mounting holes 41 are formed on the peripheral edge of the opening 9 of the inverter housing portion 8, and the cover 11 is opened to the opening 9 of the inverter housing portion 8 by the bolt 43 screwed into the mounting holes 41.
  • the opening 9 of the inverter accommodating portion 8 can be opened and closed by detachably attaching to the inverter accommodating portion 8.
  • the bolt 36A is used in the inverter accommodating portion 8 between the cover 11 and the inverter 10.
  • the vibration damping material 39 is arranged.
  • the damping material 39 provided in the inverter accommodating portion 8 will be described with reference to FIG.
  • the damping material 39 is shown by a broken line in FIGS. 1 and 2.
  • the bolt 36A located near the center of the inverter 10 is fixed to the housing 2 by fastening the inverter control board 17 of the inverter circuit section 3 and the filter circuit board 66 of the filter circuit section 4 together. (Fig. 3).
  • the bolt 36A is located near the center of the inverter housing portion 8 (that is, near the center of the cover 11), away from the peripheral edge of the opening 9 of the inverter housing portion 8.
  • the damping material 39 is disposed between the cover 11 and the bolt 36A located near the center of the inverter housing portion 8.
  • the damping material 39 is formed by molding an elastic material having an insulating property, in the embodiment, a rubber material having an insulating property such as EPDM into a cylindrical shape, and has a hardness of 60 or more.
  • a recess 74 having an inner surface having substantially the same shape as the head 47 of the bolt 36A is formed on one surface in the axial direction of the damping material 39 (one surface on the bolt 36A side).
  • the cross-shaped groove 81 formed in the head 47 of the bolt 36A (a cross-shaped groove for engaging a plus driver.
  • An escape portion 82 for avoiding 81 is formed by further recessing.
  • a protruding portion 84 protruding toward the filter circuit board 66 side is integrally formed at a position corresponding to the bolt 36A on the inner surface of the cover 11, and the surface of the protruding portion 84 facing the bolt 36A has good accuracy. It is a flat surface.
  • the damping material 39 is attached to the bolt 36A before the cover 11 closes the inverter housing portion 8. At that time, the head 47 of the bolt 36A is attached in the recess 74 of the damping material 39, and the head 47 of the bolt 36A is surrounded by the damping material 39. As a result, the damping material 39 is positioned.
  • the head 47 of the bolt 36A comes into contact with the bottom surface of the recess 74 of the damping material 39.
  • the axial dimension L1 of the damping material 39 is set to be smaller than the distance L2 between the protruding portion 84 and the filter circuit board 66. Therefore, when the inverter accommodating portion 8 is closed by the cover 11, the damping material The other surface in the axial direction of 39 contacts the protruding portion 84, and the one surface of the damping material 39 does not contact the filter circuit board 66.
  • the damping material 39 is interposed between the head 47 of the bolt 36A and the protruding portion 84 of the cover 11. Further, since the relief portion 82 formed in the recess 74 of the vibration damping material 39 in this state corresponds to the cross groove 81 of the head 47 of the bolt 36A, the vibration damping material 39 does not contact the cross groove 81. ..
  • the filter circuit board 66 of the inverter 10 is attached to the housing 2 by the bolt 36A, and the damping material 39 is arranged between the bolt 36A and the cover 11. Therefore, the housing Without forming a special structure on the two sides, a damping material 39 is interposed between the bolt 36A and the cover 11, and the vibration of the cover 11 can be damped to reduce noise.
  • the damping material 39 comes into contact with the head 47 of the bolt 36A for fixing the filter circuit board 66 of the inverter 10 to the housing 2, the damping material 39 can be received by the bolt 36A. That is, since the damping material 39 does not come into contact with the filter circuit board 66, the load of the cover 11 is applied to the filter circuit board 66, and inconveniences such as damage to the board 66 can be avoided.
  • the vibration damping material 39 is arranged so as to surround the bolt 36A, the vibration damping material 39 can be positioned by using the bolt 36A, and the assembly workability is improved. improves.
  • the protruding portion 84 protruding toward the filter circuit board 66 is formed integrally with the cover 11 at the position corresponding to the bolt 36A, the damping material 39 is brought into contact with the protruding portion 84 of the cover 11.
  • the damping material 39 can be brought into contact with the cover 11 (projection portion 84) without any trouble, and the dimensional accuracy of the projection portion 84 is improved, so that the load of the damping material 39 is stabilized. ..
  • the vibration damping material 39 is made of an elastic material having an insulating property, the insulating property between the inverter control board 17 or the filter circuit board 66 of the inverter 10 and the cover 11 is also ensured. ..
  • the damping material 39 is made of an elastic material having a hardness of 60 or more, it is possible to exert a sufficient vibration damping effect on the cover 11.
  • the cover 11 is fixed to the housing 2 at the peripheral portion, but the damping material 39 is brought into contact with the cover 11 (protruding portion 84) near the center separated from the peripheral portion. The vibration of the cover 11 can be effectively damped by the damping material 39.
  • inverter circuit unit 3 and filter circuit unit 4 The shape / structure of the inverter 10 (inverter circuit unit 3 and filter circuit unit 4) and the housing 2 shown in the examples is not limited thereto, and can be variously changed without departing from the spirit of the present invention. Needless to say,

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Inverter Devices (AREA)

Abstract

[Problem] To provide an electric compressor configured to allow a damping material for damping vibrations of a cover of an inverter accommodating portion to be installed without requiring an extra structure to be formed on the housing side and without adversely affecting a board. [Solution] This electric compressor is provided with a housing (2), an inverter (10), an inverter accommodating portion (8), and a cover (11) fixed to the housing (2) and closing the inverter accommodating portion (8). The inverter (10) includes a filter circuit board (66) on which circuit elements are mounted. The filter circuit board (66) is mounted to the housing (2) by means of a bolt (36A), and a damping material (39) is installed between the bolt (36A) and the cover (11). [Selected drawing] FIG. 1

Description

電動圧縮機Electric compressor
　本発明は、ハウジングに形成されたインバータ収容部内にインバータを収容して成る所謂インバータ一体型の電動圧縮機に関するものである。 The present invention relates to a so-called inverter-integrated electric compressor in which an inverter is housed in an inverter accommodating portion formed in a housing.
　従来よりこの種インバータ一体型の電動圧縮機では、金属製のハウジング（収容部本体）に形成されたインバータ収容部にインバータ（インバータ装置）を収容して固定し、更にこのインバータ収容部は金属製のカバーにて閉塞していた。このカバーは、周縁部をボルトにて固定されるものであるが、運転時に振動し、騒音を発生させるため、従来では基板を固定する支柱をカバー近傍まで延ばし、この支柱とカバーの間に制振材を挟むことで振動を減衰させていた（例えば、特許文献１参照）。 Conventionally, in this type of inverter-integrated electric compressor, an inverter (inverter device) is accommodated and fixed in an inverter accommodating portion formed in a metal housing (accommodating portion main body), and the inverter accommodating portion is made of metal. It was blocked by the cover of. In this cover, the peripheral edge is fixed with bolts, but in order to vibrate and generate noise during operation, conventionally, the support column for fixing the board is extended to the vicinity of the cover, and it is controlled between this support column and the cover. The vibration is damped by sandwiching the vibration material (for example, refer to Patent Document 1).
特開２０１２－１１７４４５号公報Japanese Unexamined Patent Publication No. 2012-117445
　しかしながら、係る従来の構成では制振材をカバーとの間に配置するための支柱構造をハウジングに形成しなければならない。また、係る支柱構造を採らず、基板とカバーの間に直接制振材を介在させた場合、基板に応力が加わって基板が破損してしまう恐れがある。 However, in such a conventional configuration, a strut structure for arranging the damping material between the cover and the housing must be formed. Further, if the vibration damping material is directly interposed between the substrate and the cover without adopting such a strut structure, stress may be applied to the substrate and the substrate may be damaged.
　本発明は、係る従来の技術的課題を解決するために成されたものであり、インバータ収容部のカバーの振動を減衰させるための制振材を、ハウジング側に格別な構造を形成すること無く、且つ、基板に悪影響を及ぼすこと無く配置することができる電動圧縮機を提供することを目的とする。 The present invention has been made to solve the conventional technical problems, and the damping material for damping the vibration of the cover of the inverter accommodating portion is not formed on the housing side with a special structure. Moreover, it is an object of the present invention to provide an electric compressor which can be arranged without adversely affecting a substrate.
　本発明の電動圧縮機は、モータが内蔵された金属製のハウジングと、モータを駆動するためのインバータと、ハウジングに構成され、インバータが収容されるインバータ収容部と、ハウジングに固定されてインバータ収容部を閉塞する金属製のカバーを備えたものであって、インバータは、回路素子が実装された基板を有し、この基板はボルトによりハウジングに取り付けられていると共に、ボルトとカバーの間に、制振材が配置されていることを特徴とする。 The electric compressor of the present invention includes a metal housing in which a motor is built, an inverter for driving the motor, an inverter accommodating portion in which the inverter is accommodated, and an inverter accommodating portion fixed to the housing. It is equipped with a metal cover that closes the part, and the inverter has a board on which circuit elements are mounted, and this board is attached to the housing by bolts, and between the bolt and the cover, It is characterized in that a damping material is arranged.
　請求項２の発明の電動圧縮機は、上記発明においてボルトは、溝が形成された頭部を有し、制振材はボルトの頭部に当接すると共に、制振材には溝を避ける逃げ部が形成されていることを特徴とする。 In the electric compressor according to the second aspect of the present invention, in the above invention, the bolt has a grooved head, the damping material abuts on the head of the bolt, and the damping material avoids the groove. It is characterized in that a portion is formed.
　請求項３の発明の電動圧縮機は、上記各発明において制振材は、ボルトを包囲するかたちで配置されていることを特徴とする。 The electric compressor according to the invention of claim 3 is characterized in that, in each of the above inventions, the damping material is arranged so as to surround the bolt.
　請求項４の発明の電動圧縮機は、上記各発明においてカバーには、ボルトに対応する位置において基板側に突出した突出部が一体に形成されており、制振材は、カバーの突出部に当接することを特徴とする。 In the electric compressor according to a fourth aspect of the invention, in each of the above inventions, the cover is integrally formed with a protruding portion that protrudes toward the substrate at a position corresponding to the bolt, and the damping material is provided on the protruding portion of the cover. It is characterized by abutting.
　請求項５の発明の電動圧縮機は、上記各発明において制振材は、絶縁性を有する弾性材料に構成されていることを特徴とする。 The electric compressor according to the invention of claim 5 is characterized in that, in each of the above inventions, the damping material is composed of an elastic material having an insulating property.
　請求項６の発明の電動圧縮機は、上記各発明において制振材は、硬度６０以上の弾性材料にて構成されていることを特徴とする。 The electric compressor according to the invention of claim 6 is characterized in that, in each of the above inventions, the damping material is made of an elastic material having a hardness of 60 or more.
　請求項７の発明の電動圧縮機は、上記各発明においてカバーは、周縁部にてハウジングに固定されると共に、制振材は、周縁部から離間した位置にてカバーに当接することを特徴とする。 An electric compressor according to a seventh aspect of the present invention is characterized in that, in each of the above inventions, the cover is fixed to the housing at the peripheral edge portion, and the damping material is in contact with the cover at a position separated from the peripheral edge portion. To do.
　本発明によれば、モータが内蔵された金属製のハウジングと、モータを駆動するためのインバータと、ハウジングに構成され、インバータが収容されるインバータ収容部と、ハウジングに固定されてインバータ収容部を閉塞する金属製のカバーを備えた電動圧縮機において、インバータが、回路素子が実装された基板を有し、この基板がボルトによりハウジングに取り付けられていると共に、ボルトとカバーの間に、制振材を配置したので、ハウジング側に格別な構造を形成すること無く、ボルトとカバーの間に制振材を介在させ、カバーの振動を減衰させて騒音の低減を図ることができるようになる。 According to the present invention, a metal housing having a built-in motor, an inverter for driving the motor, an inverter accommodating portion composed of the housing and accommodating the inverter, and an inverter accommodating portion fixed to the housing are provided. In an electric compressor with a metal cover that closes, an inverter has a board on which circuit elements are mounted, and this board is attached to a housing by bolts, and a vibration damping device is provided between the bolts and the cover. Since the material is arranged, it is possible to reduce the noise by interposing the damping material between the bolt and the cover and dampening the vibration of the cover without forming a special structure on the housing side.
　特に、インバータの基板をハウジングに固定するためのボルトで制振材を受けることができるので、カバーの荷重が基板に加わって破損する等の不都合も回避することができるようになる。 Especially, since the damping material can be received by the bolts for fixing the inverter board to the housing, it is possible to avoid the inconvenience that the load of the cover is applied to the board and the board is damaged.
　ここで、ボルトとカバーの間に制振材を配置する場合、制振材はボルトの頭部に当接することになるが、制振材がボルトの頭部に形成された溝に当接すると、この溝に対応する部分の制振材に歪み集中してしまい、制振材が破損する危険性があるが、請求項２の発明の如く制振材に、ボルトの頭部の溝を避ける逃げ部を形成すれば、係る不都合も解消される。 Here, when the damping material is arranged between the bolt and the cover, the damping material comes into contact with the head of the bolt, but when the damping material comes into contact with the groove formed in the head of the bolt, , There is a risk that the damping material will be damaged due to strain concentration on the damping material in the portion corresponding to this groove. However, as in the invention of claim 2, avoid the groove on the head of the bolt in the damping material. By forming the escape portion, such inconvenience can be eliminated.
　また、請求項３の発明の如く制振材が、ボルトを包囲するかたちで配置される構造とすれば、ボルトを用いて制振材の位置決めを行うことができるようになり、組立作業性が向上する。 Further, if the damping material is arranged so as to surround the bolt as in the invention of claim 3, the damping material can be positioned by using the bolt, and the assembly workability is improved. improves.
　更に、請求項４の発明の如く、ボルトに対応する位置において基板側に突出した突出部をカバーに一体に形成し、制振材を、カバーの突出部に当接させることで、制振材を支障無くカバー（の突出部）に当接させることができるようになると共に、突出部の寸法精度も向上することで制振材の荷重が安定する。 Further, as in the invention of claim 4, a protruding portion protruding toward the substrate is integrally formed on the cover at a position corresponding to the bolt, and the damping material is brought into contact with the protruding portion of the cover to cause the damping material. Can be brought into contact with (the protruding portion of) the cover without hindrance, and the dimensional accuracy of the protruding portion is improved, so that the load of the damping material is stabilized.
　また、請求項５の発明の如く制振材を、絶縁性を有する弾性材料に構成すれば、基板とカバーとの間の絶縁性も担保される。 If the vibration damping material is made of an elastic material having an insulating property as in the invention of claim 5, the insulating property between the substrate and the cover is secured.
　更に、請求項６の発明の如く制振材を、硬度６０以上の弾性材料にて構成することで、カバーに対し十分な振動減衰効果を発揮することができるようになる。 Furthermore, by constructing the damping material with an elastic material having a hardness of 60 or more as in the invention of claim 6, it becomes possible to exert a sufficient vibration damping effect on the cover.
　更にまた、カバーを周縁部にてハウジングに固定した場合には、請求項７の発明の如く周縁部から離間した位置にて制振材をカバーに当接させれば、カバーの振動を制振材により効果的に減衰させることができるようになる。 Furthermore, when the cover is fixed to the housing at the peripheral portion, the vibration of the cover can be suppressed by bringing the damping material into contact with the cover at a position separated from the peripheral portion as in the invention of claim 7. The material can be effectively damped.
本発明を適用した一実施例の電動圧縮機の概略縦断側面図である。1 is a schematic vertical sectional side view of an electric compressor according to an embodiment of the present invention. カバーを取り外した状態の図１の電動圧縮機をインバータ収容部側から見た平面図である。It is the top view which looked at the electric compressor of FIG. 1 in the state which removed the cover from the inverter accommodating part side. 図１の電動圧縮機のインバータ収容部の部分の拡大縦断側面図である。It is an expanded vertical side view of the part of the inverter accommodating part of the electric compressor of FIG. 図３のインバータ収容部の制振材部分の拡大縦断面図である。FIG. 4 is an enlarged vertical sectional view of a damping material portion of the inverter accommodating portion of FIG. 3.
　以下、本発明の一実施形態について、図面に基づき詳細に説明する。図１は本発明を適用した実施例の電動圧縮機１の概略縦断側面図、図２は電動圧縮機１のカバー１１を取り外した状態のインバータ収容部８側から見た平面図、図３は電動圧縮機１のインバータ収容部８の部分の拡大縦断側面図である。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic longitudinal side view of an electric compressor 1 of an embodiment to which the present invention is applied, FIG. 2 is a plan view of the inverter accommodating portion 8 with the cover 11 of the electric compressor 1 removed, and FIG. FIG. 3 is an enlarged vertical side view of an inverter housing portion 8 of the electric compressor 1.
　実施例の電動圧縮機１は、所謂インバータ一体型の電動圧縮機であり、図示しない車両の車室内を空調する車両用空気調和装置の冷媒回路の一部を構成するものである。電動圧縮機１は、モータ６と、このモータ６の回転軸５により駆動される圧縮機構７を内蔵した金属製のハウジング２と、モータ６を駆動するインバータ１０を備えており、実施例のインバータ１０は、制御を司るためのインバータ回路部３と、スイッチング電流の高周波成分を吸収するためのフィルタ回路部４を有している。 The electric compressor 1 of the embodiment is a so-called inverter-integrated electric compressor, and constitutes a part of a refrigerant circuit of a vehicle air conditioner that air-conditions the interior of a vehicle (not shown). The electric compressor 1 includes a motor 6, a metal housing 2 having a compression mechanism 7 that is driven by a rotary shaft 5 of the motor 6, and an inverter 10 that drives the motor 6. Reference numeral 10 denotes an inverter circuit unit 3 for controlling control and a filter circuit unit 4 for absorbing a high frequency component of the switching current.
　実施例のハウジング２の外面には、モータ６の回転軸５の軸方向における一端側に位置してインバータ収容部８が構成されており、このインバータ収容部８の開口９は、ハウジング２と同様の金属製のカバー１１により開閉可能に閉塞される。そして、このインバータ収容部８内にインバータ１０を構成するインバータ回路部３とフィルタ回路部４が収容され、ハウジング２に着脱可能に取り付けられるように構成されている。尚、各図ではインバータ収容部８を上にした状態で実施例の電動圧縮機１を示しているが、実際にはインバータ収容部８が一側となるように横方向で配置されるものである。 On the outer surface of the housing 2 of the embodiment, an inverter accommodating portion 8 is formed at one end side in the axial direction of the rotary shaft 5 of the motor 6, and the opening 9 of the inverter accommodating portion 8 is the same as the housing 2. The metal cover 11 of FIG. The inverter circuit unit 3 and the filter circuit unit 4 constituting the inverter 10 are housed in the inverter housing unit 8, and are configured to be detachably attached to the housing 2. In each figure, the electric compressor 1 of the embodiment is shown with the inverter accommodating portion 8 facing up, but in reality, the inverter accommodating portion 8 is arranged in the horizontal direction so as to be on one side. is there.
　実施例のモータ６は、三相同期モータ（ブラシレスＤＣモータ）から構成されており、圧縮機構７は例えばスクロール式の圧縮機構である。圧縮機構７はモータ６の回転軸５により駆動され、冷媒を圧縮して冷媒回路内に吐出する。そして、ハウジング２には、これも冷媒回路の一部を構成するエバポレータ（吸熱器とも称される）から吸入された低温のガス冷媒が流通される。そのため、ハウジング２内は冷却されている。そして、インバータ収容部８は、当該インバータ収容部８の底面となる隔壁１２によりモータ６が収容されるハウジング２内と区画されており、この隔壁１２も低温のガス冷媒により冷却される。 The motor 6 of the embodiment is composed of a three-phase synchronous motor (brushless DC motor), and the compression mechanism 7 is, for example, a scroll type compression mechanism. The compression mechanism 7 is driven by the rotating shaft 5 of the motor 6 to compress the refrigerant and discharge it into the refrigerant circuit. Then, a low-temperature gas refrigerant sucked from an evaporator (also referred to as a heat absorber), which also constitutes a part of the refrigerant circuit, is circulated in the housing 2. Therefore, the inside of the housing 2 is cooled. The inverter accommodating portion 8 is partitioned from the inside of the housing 2 in which the motor 6 is accommodated by a partition wall 12 which is the bottom surface of the inverter accommodating portion 8, and the partition wall 12 is also cooled by a low temperature gas refrigerant.
　実施例のインバータ回路部３は、三相インバータ回路の各相のアームを構成する６個の電力スイッチング素子１３（実施例ではＩＧＢＴ）が実装されたパワーモジュール１４と、回路素子としての制御回路１６が実装されたインバータ制御基板（基板）１７と、複数の端子接続部１９、２０、２１、２２、２３を有する樹脂製のスリーブアセンブリ１８を備えている。 In the inverter circuit unit 3 of the embodiment, a power module 14 in which six power switching elements 13 (IGBTs in the embodiment) that form an arm of each phase of a three-phase inverter circuit are mounted, and a control circuit 16 as a circuit element. An inverter control board (board) 17 on which is mounted, and a resin sleeve assembly 18 having a plurality of terminal connecting portions 19, 20, 21, 22, 23 are provided.
　このインバータ回路部３は、図示しない車両のバッテリから給電される直流電力を三相交流電力に変換してモータ６のステータコイル２７に給電するものである。そのため、各相の上アーム側の電力スイッチング素子１３と下アーム側の電力スイッチング素子１３との接続点が、ハウジング２の隔壁１２から引き出された引出端子２４、２５、２６に３個のモータ側接続端子２８を介してそれぞれ接続され、上アーム側の電力スイッチング素子１３の電源端子と下アーム側の電力スイッチング素子１３の接地端子が、フィルタ回路部４と高電力用コネクタ（ＨＶコネクタ）２９を介して前述したバッテリからの電源ハーネスに接続されることになる。 The inverter circuit unit 3 converts DC power supplied from a vehicle battery (not shown) into three-phase AC power and supplies power to the stator coil 27 of the motor 6. Therefore, the connection points between the power switching element 13 on the upper arm side and the power switching element 13 on the lower arm side of each phase are on the three motor sides at the extraction terminals 24, 25, and 26 drawn from the partition wall 12 of the housing 2. The power supply terminal of the power switching element 13 on the upper arm side and the ground terminal of the power switching element 13 on the lower arm side, which are respectively connected via the connection terminals 28, connect the filter circuit section 4 and the high power connector (HV connector) 29. It will be connected to the power harness from the above-mentioned battery via.
　この場合、各相の上アーム側の電力スイッチング素子１３と下アーム側の電力スイッチング素子１３との接続点が接続される引出端子２４～２６は、隔壁１２を貫通してハウジング２内のモータ６のステータコイル２７に接続されている。また、電源端子と接地端子は、フィルタ回路部４、前述した高電力用コネクタ２９から引き出された２本の配線９８の先端にそれぞれ設けられた電源側接続端子３１、及び、当該高電力用コネクタ２９等を介して電源ハーネスに電気的に接続される。 In this case, the lead-out terminals 24 to 26, to which the connection points of the power switching element 13 on the upper arm side and the power switching element 13 on the lower arm side of each phase are connected, penetrate the partition wall 12 and the motor 6 inside the housing 2. It is connected to the stator coil 27 of. The power supply terminal and the ground terminal are the filter circuit unit 4, the power supply side connection terminal 31 provided at the tip of each of the two wires 98 drawn from the high power connector 29 described above, and the high power connector. It is electrically connected to the power supply harness via 29 or the like.
　実施例のスリーブアセンブリ１８には、前述した端子接続部１９、２０、２１、２２、２３が突設されており、スリーブアセンブリ１８は更に６個のスリーブ３２を有している。このスリーブ３２は所定長さ寸法の金属製円筒から成り、これら端子接続部１９～２３とスリーブ３２は、絶縁性の硬質樹脂によりスリーブアセンブリ１８と一体にモールドされている。各スリーブ３２はスリーブアセンブリ１８の周辺部に配置され、上下端がスリーブアセンブリ１８の表面と裏面で露出して開口し、後述するハウジング２に固定するためのボルト３６（３６Ａ）を挿通可能とされる。 The above-described terminal connecting portions 19, 20, 21, 22, 23 are provided on the sleeve assembly 18 of the embodiment in a protruding manner, and the sleeve assembly 18 further has six sleeves 32. The sleeve 32 is made of a metal cylinder having a predetermined length, and the terminal connection portions 19 to 23 and the sleeve 32 are integrally molded with the sleeve assembly 18 by an insulating hard resin. Each of the sleeves 32 is arranged in the peripheral portion of the sleeve assembly 18, and the upper and lower ends thereof are exposed and opened on the front and back surfaces of the sleeve assembly 18, and bolts 36 (36A) for fixing to the housing 2 described later can be inserted therein. To.
　フィルタ回路部４は、三相インバータ回路の電源端子と設置端子との間に接続される比較的大型の平滑コンデンサ６３や電源端子に接続されるこれも比較的大型のコイル６４等の回路素子が実装されたフィルタ回路基板（基板）６６と、これらコンデンサ６３やコイル６４（回路素子）を収容する硬質樹脂製の支持部材６７から構成されている。 The filter circuit unit 4 includes circuit elements such as a relatively large smoothing capacitor 63 connected between the power supply terminal and the installation terminal of the three-phase inverter circuit and a relatively large coil 64 connected to the power supply terminal. It is composed of a mounted filter circuit board (board) 66 and a support member 67 made of hard resin for accommodating these capacitors 63 and coils 64 (circuit elements).
　支持部材６７は一面が開口し、上記の如く大型の平滑コンデンサ６３やコイル６４を収容するのに十分な深さ寸法を有した容器（ケース）状を呈しており、支持部材６７の周辺部には金属製円筒から成る所定長さ寸法のスリーブ６８が５個、絶縁性の硬質樹脂により支持部材６７と一体にモールドされ、支持部材６７の表面と裏面にて露出し、開口している。また、支持部材６７の一端側には、ボルト９３で電源側接続端子３１を接続するための袋状の金属製ナット部材６９が２個、同様に支持部材６７と一体に樹脂モールドされ、支持部材６７の表面にて露出し、開口している。また、支持部材６７の他端側には、２個のフィルタ側接続端子７１が同じく一体に樹脂モールドされている。 The support member 67 has an opening on one side and has a container (case) shape having a depth dimension sufficient for accommodating the large smoothing capacitor 63 and the coil 64 as described above, and is formed in a peripheral portion of the support member 67. Has five sleeves 68 each having a predetermined length and made of a metal cylinder, which are integrally molded with the supporting member 67 by an insulating hard resin, and are exposed and opened on the front surface and the back surface of the supporting member 67. Further, on one end side of the support member 67, two bag-shaped metal nut members 69 for connecting the power supply side connection terminals 31 with the bolts 93 are similarly resin-molded integrally with the support member 67 to form a support member. It is exposed and open on the surface of 67. Two filter-side connection terminals 71 are also integrally resin-molded on the other end of the support member 67.
　このようなインバータ回路部３とフィルタ回路部４は複数のボルト３６、３６Ａ（実施例では１０本）によりハウジング２に取り付けられる。この場合、先ずインバータ回路部３とフィルタ回路部４をハウジング２のインバータ収容部８内にそれぞれ収容する。そして、インバータ回路部３の図示しない挿通孔と、フィルタ回路部４の図示しない挿通孔に各ボルト３６、３６Ａを挿通し、ハウジング２のネジ孔８３、８６にそれぞれ螺合させ、締結することでインバータ１０のインバータ回路部３とフィルタ回路部４をハウジング２に着脱可能に取り付ける。 Such an inverter circuit unit 3 and a filter circuit unit 4 are attached to the housing 2 by a plurality of bolts 36 and 36A (10 in the embodiment). In this case, first, the inverter circuit portion 3 and the filter circuit portion 4 are housed in the inverter housing portion 8 of the housing 2, respectively. Then, the bolts 36 and 36A are inserted into the insertion holes (not shown) of the inverter circuit unit 3 and the insertion holes (not shown) of the filter circuit unit 4, respectively, and screwed into the screw holes 83 and 86 of the housing 2 to be fastened. The inverter circuit unit 3 and the filter circuit unit 4 of the inverter 10 are detachably attached to the housing 2.
　このとき、インバータ１０の中央付近に位置するボルト３６Ａ（図１、図２で破線で示す後述する制振材３９で包囲されたボルト）は、インバータ１０のインバータ回路部３のインバータ制御基板１７とフィルタ回路部４のフィルタ回路基板６６をハウジング２に共締めにより取り付けることになる（図３）。また、この状態でインバータ回路部３の各端子接続部１９、２０、２１は、引出端子２４、２５、２６にそれぞれ隣接する。 At this time, the bolt 36A (the bolt surrounded by the vibration damping material 39 described later shown by the broken line in FIGS. 1 and 2) located near the center of the inverter 10 is connected to the inverter control board 17 of the inverter circuit unit 3 of the inverter 10. The filter circuit board 66 of the filter circuit unit 4 is attached to the housing 2 by tightening together (FIG. 3). Further, in this state, the terminal connection portions 19, 20, and 21 of the inverter circuit unit 3 are adjacent to the drawer terminals 24, 25, and 26, respectively.
　次に、３個のモータ側接続端子２８の一端に各引出端子２４、２５、２６をそれぞれ圧入する。これにより、各モータ側接続端子２８の一端は、各引出端子２４～２６に圧接して電気的に接続される。また、モータ側接続端子２８の他端には各端子接続部１９、２０、２１を進入させ、ナットで引出端子２４と端子接続部１９、引出端子２５と端子接続部２０、引出端子２６と端子接続部２１間に渡ってそれぞれモータ側接続端子２８を取り付ける。 Next, the drawer terminals 24, 25, and 26 are press-fitted into one end of the three motor-side connection terminals 28, respectively. As a result, one end of each motor-side connection terminal 28 is electrically connected to each of the drawer terminals 24 to 26 by pressure contact. Further, the terminal connection portions 19, 20 and 21 are inserted into the other end of the motor side connection terminal 28, and the drawer terminal 24 and the terminal connection portion 19, the drawer terminal 25 and the terminal connection portion 20, and the drawer terminal 26 and the terminal are inserted with nuts. The motor-side connection terminals 28 are attached across the connection portions 21.
　これにより、各モータ側接続端子２８はインバータ制御基板１７を介して各端子接続部１９～２１に締結される。このようにして、各モータ側接続端子２８をインバータ制御基板１７に固定して電気的に接続し、モータ６からの引出端子２４～２６を、モータ側接続端子２８によりインバータ制御基板１７に電気的に接続する。 As a result, each motor side connection terminal 28 is fastened to each terminal connection portion 19 to 21 via the inverter control board 17. In this way, each motor side connection terminal 28 is fixed to the inverter control board 17 and electrically connected, and the extraction terminals 24 to 26 from the motor 6 are electrically connected to the inverter control board 17 by the motor side connection terminal 28. Connect to.
　また、インバータ回路部３の端子接続部２２、２３とフィルタ側接続端子７１をナットで接続する。これにより、フィルタ側接続端子７１をインバータ制御基板１７に固定して電気的に接続し、フィルタ回路部４のフィルタ回路基板６６を、フィルタ側接続端子７１を介してインバータ制御基板１７に電気的に接続する。 Also, connect the terminal connection parts 22 and 23 of the inverter circuit part 3 and the filter-side connection terminal 71 with a nut. As a result, the filter-side connection terminal 71 is fixed to the inverter control board 17 and electrically connected, and the filter circuit board 66 of the filter circuit unit 4 is electrically connected to the inverter control board 17 via the filter-side connection terminal 71. Connecting.
　そして、最後にインバータ収容部８の開口９の周縁部には、複数の取付孔４１が形成されており、この取付孔４１に螺合するボルト４３により、カバー１１をインバータ収容部８の開口９に着脱可能に取り付けることで、開閉可能にインバータ収容部８の開口９を閉塞するものであるが、本発明ではこのカバー１１とインバータ１０の間のインバータ収容部８内に、ボルト３６Ａを利用して制振材３９が配置される。 Finally, a plurality of mounting holes 41 are formed on the peripheral edge of the opening 9 of the inverter housing portion 8, and the cover 11 is opened to the opening 9 of the inverter housing portion 8 by the bolt 43 screwed into the mounting holes 41. The opening 9 of the inverter accommodating portion 8 can be opened and closed by detachably attaching to the inverter accommodating portion 8. However, in the present invention, the bolt 36A is used in the inverter accommodating portion 8 between the cover 11 and the inverter 10. The vibration damping material 39 is arranged.
　次に、図４を参照しながらインバータ収容部８内に設けられる上記制振材３９について説明する。尚、制振材３９は図１、図２では破線で示している。ここで、前述した如く実施例ではインバータ１０の中央付近に位置するボルト３６Ａは、インバータ回路部３のインバータ制御基板１７とフィルタ回路部４のフィルタ回路基板６６を共締めによりハウジング２に固定している（図３）。そして、このボルト３６Ａはインバータ収容部８の開口９の周縁部から離間した、インバータ収容部８の中央付近（即ち、カバー１１の中央付近）に位置している。そして、実施例ではこのインバータ収容部８の中央付近に位置するボルト３６Ａと、カバー１１との間に制振材３９を配置する。 Next, the damping material 39 provided in the inverter accommodating portion 8 will be described with reference to FIG. The damping material 39 is shown by a broken line in FIGS. 1 and 2. Here, as described above, in the embodiment, the bolt 36A located near the center of the inverter 10 is fixed to the housing 2 by fastening the inverter control board 17 of the inverter circuit section 3 and the filter circuit board 66 of the filter circuit section 4 together. (Fig. 3). The bolt 36A is located near the center of the inverter housing portion 8 (that is, near the center of the cover 11), away from the peripheral edge of the opening 9 of the inverter housing portion 8. In the embodiment, the damping material 39 is disposed between the cover 11 and the bolt 36A located near the center of the inverter housing portion 8.
　この制振材３９は、絶縁性を有する弾性材料、実施例ではＥＰＤＭ等の絶縁性を有するゴム材料を円筒状に成型して構成されており、硬度は６０以上のものを採用している。また、制振材３９の軸方向の一面（ボルト３６Ａ側となる一面）には、内面がボルト３６Ａの頭部４７と略同形状とされた凹所７４が形成されており、この凹所７４の底面には、ボルト３６Ａの頭部４７に形成された十字溝８１（プラスドライバーを係合させるための十字溝。マイナスドライバーの場合には－溝でもよい）に対応する位置に、当該十字溝８１を避けるための逃げ部８２が、更に凹陥して形成されている。 The damping material 39 is formed by molding an elastic material having an insulating property, in the embodiment, a rubber material having an insulating property such as EPDM into a cylindrical shape, and has a hardness of 60 or more. In addition, a recess 74 having an inner surface having substantially the same shape as the head 47 of the bolt 36A is formed on one surface in the axial direction of the damping material 39 (one surface on the bolt 36A side). On the bottom surface of the cross-shaped groove, the cross-shaped groove 81 formed in the head 47 of the bolt 36A (a cross-shaped groove for engaging a plus driver. An escape portion 82 for avoiding 81 is formed by further recessing.
　一方、カバー１１の内面のボルト３６Ａに対応する位置には、フィルタ回路基板６６側に突出した突出部８４が一体に形成されており、突出部８４のボルト３６Ａに対向する面は、精度の良い平坦面とされている。そして、カバー１１をハウジング２に取り付けたときに、制振材３９の軸方向の寸法Ｌ１は、突出部８４とフィルタ回路基板６６との間隔Ｌ２より小さくなるように設定されている（図４で、Ｌ１＜Ｌ２）。 On the other hand, a protruding portion 84 protruding toward the filter circuit board 66 side is integrally formed at a position corresponding to the bolt 36A on the inner surface of the cover 11, and the surface of the protruding portion 84 facing the bolt 36A has good accuracy. It is a flat surface. When the cover 11 is attached to the housing 2, the axial dimension L1 of the damping material 39 is set to be smaller than the distance L2 between the protrusion 84 and the filter circuit board 66 (FIG. 4). , L1 <L2).
　係る制振材３９はカバー１１でインバータ収容部８を閉じる前にボルト３６Ａに取り付ける。その際、制振材３９の凹所７４内にボルト３６Ａの頭部４７を収納するかたちで取り付け、制振材３９によりボルト３６Ａの頭部４７を包囲する。これにより、制振材３９が位置決めされる。 The damping material 39 is attached to the bolt 36A before the cover 11 closes the inverter housing portion 8. At that time, the head 47 of the bolt 36A is attached in the recess 74 of the damping material 39, and the head 47 of the bolt 36A is surrounded by the damping material 39. As a result, the damping material 39 is positioned.
　また、この状態で制振材３９の凹所７４の底面に、ボルト３６Ａの頭部４７が当接する。前述した如く制振材３９の軸方向の寸法Ｌ１は、突出部８４とフィルタ回路基板６６との間隔Ｌ２より小さく設定されているので、カバー１１でインバータ収容部８を閉塞したとき、制振材３９の軸方向の他面は突出部８４に当接し、制振材３９の一面はフィルタ回路基板６６には当接しない。そして、制振材３９はボルト３６Ａの頭部４７とカバー１１の突出部８４の間に介在することになる。また、この状態で制振材３９の凹所７４内に形成された逃げ部８２は、ボルト３６Ａの頭部４７の十字溝８１に対応するので、制振材３９は十字溝８１に当接しない。 Also, in this state, the head 47 of the bolt 36A comes into contact with the bottom surface of the recess 74 of the damping material 39. As described above, the axial dimension L1 of the damping material 39 is set to be smaller than the distance L2 between the protruding portion 84 and the filter circuit board 66. Therefore, when the inverter accommodating portion 8 is closed by the cover 11, the damping material The other surface in the axial direction of 39 contacts the protruding portion 84, and the one surface of the damping material 39 does not contact the filter circuit board 66. The damping material 39 is interposed between the head 47 of the bolt 36A and the protruding portion 84 of the cover 11. Further, since the relief portion 82 formed in the recess 74 of the vibration damping material 39 in this state corresponds to the cross groove 81 of the head 47 of the bolt 36A, the vibration damping material 39 does not contact the cross groove 81. ..
　このように、インバータ収容部８内において、インバータ１０のフィルタ回路基板６６をボルト３６Ａによりハウジング２に取り付けると共に、ボルト３６Ａとカバー１１の間に、制振材３９を配置するようにしたので、ハウジング２側に格別な構造を形成すること無く、ボルト３６Ａとカバー１１の間に制振材３９を介在させ、カバー１１の振動を減衰させて、騒音の低減を図ることができるようになる。 In this way, in the inverter accommodating portion 8, the filter circuit board 66 of the inverter 10 is attached to the housing 2 by the bolt 36A, and the damping material 39 is arranged between the bolt 36A and the cover 11. Therefore, the housing Without forming a special structure on the two sides, a damping material 39 is interposed between the bolt 36A and the cover 11, and the vibration of the cover 11 can be damped to reduce noise.
　特に、インバータ１０のフィルタ回路基板６６を、ハウジング２に固定するためのボルト３６Ａの頭部４７に制振材３９は当接するので、ボルト３６Ａで制振材３９を受けることできるようになる。即ち、制振材３９はフィルタ回路基板６６に当接しないので、カバー１１の荷重がフィルタ回路基板６６に加わって、当該基板６６が破損する等の不都合も回避することができるようになる。 In particular, since the damping material 39 comes into contact with the head 47 of the bolt 36A for fixing the filter circuit board 66 of the inverter 10 to the housing 2, the damping material 39 can be received by the bolt 36A. That is, since the damping material 39 does not come into contact with the filter circuit board 66, the load of the cover 11 is applied to the filter circuit board 66, and inconveniences such as damage to the board 66 can be avoided.
　ここで、ボルト３６Ａとカバー１１の間に制振材３９を配置すると、制振材３９の凹所７４の底面はボルト３６Ａの頭部４７に当接することになる。そして、制振材３９の凹所７４がボルト３６Ａの頭部４７に形成された十字溝８１に当接すると、この十字溝８１に対応する部分の制振材３９に歪み集中してしまい、制振材３９が破損する危険性があるが、実施例では制振材３９の凹所７４の底面に、ボルト３６Ａの頭部４７の十字溝８１を避ける逃げ部８２を形成しているので、係る不都合も解消される。 When the damping material 39 is arranged between the bolt 36A and the cover 11, the bottom surface of the recess 74 of the damping material 39 comes into contact with the head 47 of the bolt 36A. Then, when the recess 74 of the damping material 39 comes into contact with the cross groove 81 formed in the head 47 of the bolt 36A, the vibration damping material 39 in the portion corresponding to the cross groove 81 is distorted and concentrated, and the damping material 39 is damped. There is a risk that the vibration member 39 will be damaged, but in the embodiment, a relief portion 82 that avoids the cross groove 81 of the head 47 of the bolt 36A is formed on the bottom surface of the recess 74 of the vibration damping material 39. The inconvenience is also eliminated.
　また、実施例では制振材３９が、ボルト３６Ａを包囲するかたちで配置される構造としているので、ボルト３６Ａを用いて制振材３９の位置決めを行うことができるようになり、組立作業性が向上する。 Further, in the embodiment, since the vibration damping material 39 is arranged so as to surround the bolt 36A, the vibration damping material 39 can be positioned by using the bolt 36A, and the assembly workability is improved. improves.
　更に、実施例ではボルト３６Ａに対応する位置においてフィルタ回路基板６６側に突出した突出部８４をカバー１１に一体に形成しているので、制振材３９をカバー１１の突出部８４に当接させることで、支障無く制振材３９をカバー１１（突出部８４）に当接させることができるようになると共に、突出部８４の寸法精度も向上することで、制振材３９の荷重が安定する。 Further, in the embodiment, since the protruding portion 84 protruding toward the filter circuit board 66 is formed integrally with the cover 11 at the position corresponding to the bolt 36A, the damping material 39 is brought into contact with the protruding portion 84 of the cover 11. Thus, the damping material 39 can be brought into contact with the cover 11 (projection portion 84) without any trouble, and the dimensional accuracy of the projection portion 84 is improved, so that the load of the damping material 39 is stabilized. ..
　また、実施例では制振材３９を、絶縁性を有する弾性材料に構成しているので、インバータ１０のインバータ制御基板１７やフィルタ回路基板６６と、カバー１１との間の絶縁性も担保される。 Further, in the embodiment, since the vibration damping material 39 is made of an elastic material having an insulating property, the insulating property between the inverter control board 17 or the filter circuit board 66 of the inverter 10 and the cover 11 is also ensured. ..
　更に、実施例では制振材３９を、硬度６０以上の弾性材料にて構成しているので、カバー１１に対し十分な振動減衰効果を発揮させることができるようになる。 Furthermore, in the embodiment, since the damping material 39 is made of an elastic material having a hardness of 60 or more, it is possible to exert a sufficient vibration damping effect on the cover 11.
　更にまた、実施例ではカバー１１を周縁部にてハウジング２に固定しているが、周縁部から離間した中央付近にて制振材３９をカバー１１（突出部８４）に当接させているので、カバー１１の振動を制振材３９により効果的に減衰させることができるようになる。 Furthermore, in the embodiment, the cover 11 is fixed to the housing 2 at the peripheral portion, but the damping material 39 is brought into contact with the cover 11 (protruding portion 84) near the center separated from the peripheral portion. The vibration of the cover 11 can be effectively damped by the damping material 39.
　尚、実施例で示したインバータ１０（インバータ回路部３やフィルタ回路部４）や、ハウジング２の形状／構造は、それに限定されるものでは無く、本発明の趣旨を逸脱しない範囲で種々変更可能であることは云うまでもない。 The shape / structure of the inverter 10 (inverter circuit unit 3 and filter circuit unit 4) and the housing 2 shown in the examples is not limited thereto, and can be variously changed without departing from the spirit of the present invention. Needless to say,
　１　電動圧縮機
　２　ハウジング
　３　インバータ回路部
　４　フィルタ回路部
　６　モータ
　８　インバータ収容部
　１０　インバータ
　１１　カバー
　１２　隔壁
　１３　電力スイッチング素子
　１４　パワーモジュール
　１６　制御回路（回路素子）
　１７　インバータ制御基板（基板）
　３６、３６Ａ　ボルト
　３９　制振材
　４１　取付孔
　４３　ボルト
　４７　頭部
　６３　平滑コンデンサ（回路素子）
　６４　コイル（回路素子）
　６６　フィルタ回路基板（基板）
　７４　凹所
　８１　十字溝（溝）
　８２　逃げ部
　８４　突出部 DESCRIPTION OF SYMBOLS 1 Electric compressor 2 Housing 3 Inverter circuit part 4 Filter circuit part 6 Motor 8 Inverter housing part 10 Inverter 11 Cover 12 Partition wall 13 Power switching element 14 Power module 16 Control circuit (circuit element)
17 Inverter control board (board)
36, 36A Bolt 39 Damping material 41 Mounting hole 43 Bolt 47 Head 63 Smoothing capacitor (circuit element)
64 coils (circuit element)
66 Filter circuit board (board)
74 recess 81 cross groove (groove)
82 Escape part 84 Projection part

Claims (7)

  1. 　モータが内蔵された金属製のハウジングと、前記モータを駆動するためのインバータと、前記ハウジングに構成され、前記インバータが収容されるインバータ収容部と、前記ハウジングに固定されて前記インバータ収容部を閉塞する金属製のカバーを備えた電動圧縮機において、
    　前記インバータは、回路素子が実装された基板を有し、該基板はボルトにより前記ハウジングに取り付けられていると共に、
    　前記ボルトと前記カバーの間に、制振材が配置されていることを特徴とする電動圧縮機。     A metal housing containing a motor, an inverter for driving the motor, an inverter accommodating portion configured in the housing and accommodating the inverter, and an inverter accommodating portion fixed to the housing to block the inverter accommodating portion. In an electric compressor with a metal cover
    The inverter has a substrate on which circuit elements are mounted, and the substrate is attached to the housing by bolts,
    An electric compressor characterized in that a damping material is arranged between the bolt and the cover.
  2. 　前記ボルトは、溝が形成された頭部を有し、前記制振材は前記ボルトの頭部に当接すると共に、
    　前記制振材には前記溝を避ける逃げ部が形成されていることを特徴とする請求項１に記載の電動圧縮機。     The bolt has a head in which a groove is formed, and the damping material contacts the head of the bolt,
    The electric compressor according to claim 1, wherein the damping material is formed with a relief portion that avoids the groove.
  3. 　前記制振材は、前記ボルトを包囲するかたちで配置されていることを特徴とする請求項１又は請求項２に記載の電動圧縮機。 The electric compressor according to claim 1 or 2, wherein the vibration damping material is arranged so as to surround the bolt.
  4. 　前記カバーには、前記ボルトに対応する位置において前記基板側に突出した突出部が一体に形成されており、
    　前記制振材は、前記カバーの突出部に当接することを特徴とする請求項１乃至請求項３のうちの何れかに記載の電動圧縮機。     The cover is integrally formed with a protrusion that protrudes toward the substrate at a position corresponding to the bolt,
    The electric damper according to any one of claims 1 to 3, wherein the damping material is in contact with a protruding portion of the cover.
  5. 　前記制振材は、絶縁性を有する弾性材料に構成されていることを特徴とする請求項１乃至請求項４のうちの何れかに記載の電動圧縮機。 The electric compressor according to any one of claims 1 to 4, wherein the vibration damping material is made of an elastic material having an insulating property.
  6. 　前記制振材は、硬度６０以上の弾性材料にて構成されていることを特徴とする請求項１乃至請求項５のうちの何れかに記載の電動圧縮機。 The electric compressor according to any one of claims 1 to 5, wherein the vibration damping material is made of an elastic material having a hardness of 60 or more.
  7. 　前記カバーは、周縁部にて前記ハウジングに固定されると共に、
    　前記制振材は、前記周縁部から離間した位置にて前記カバーに当接することを特徴とする請求項１乃至請求項６のうちの何れかに記載の電動圧縮機。     The cover is fixed to the housing at the peripheral edge and is fixed to the housing.
    The electric compressor according to any one of claims 1 to 6, wherein the vibration damping material comes into contact with the cover at a position separated from the peripheral edge portion.
PCT/JP2020/005717 2019-03-05 2020-02-14 Electric compressor WO2020179404A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06203624A (en) * 1993-01-11 1994-07-22 Matsushita Electric Works Ltd Vibration resistant electronic circuit block
JP2010285980A (en) * 2009-05-13 2010-12-24 Sanden Corp Inverter-integrated electric compressor
JP2012117444A (en) * 2010-11-30 2012-06-21 Mitsubishi Heavy Ind Ltd Inverter housing part, and electric compressor integrated with inverter including the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06203624A (en) * 1993-01-11 1994-07-22 Matsushita Electric Works Ltd Vibration resistant electronic circuit block
JP2010285980A (en) * 2009-05-13 2010-12-24 Sanden Corp Inverter-integrated electric compressor
JP2012117444A (en) * 2010-11-30 2012-06-21 Mitsubishi Heavy Ind Ltd Inverter housing part, and electric compressor integrated with inverter including the same

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