JP6955220B2 - Electric compressor - Google Patents

Electric compressor Download PDF

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Publication number
JP6955220B2
JP6955220B2 JP2018070072A JP2018070072A JP6955220B2 JP 6955220 B2 JP6955220 B2 JP 6955220B2 JP 2018070072 A JP2018070072 A JP 2018070072A JP 2018070072 A JP2018070072 A JP 2018070072A JP 6955220 B2 JP6955220 B2 JP 6955220B2
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top plate
plate portion
rib
mounting leg
ribs
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JP2019178673A (en
Inventor
山田　哲也
哲也 山田
順也 矢野
順也 矢野
雄介 木下
雄介 木下
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Toyota Industries Corp
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Toyota Industries Corp
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Priority to JP2018070072A priority Critical patent/JP6955220B2/en
Priority to DE102019203806.9A priority patent/DE102019203806A1/en
Priority to CN201910241723.3A priority patent/CN110319011B/en
Priority to KR1020190035707A priority patent/KR102191953B1/en
Publication of JP2019178673A publication Critical patent/JP2019178673A/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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block
    • 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
    • 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
    • F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/047—Cooling of electronic devices installed inside the pump housing, e.g. inverters
    • 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • 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
    • F04C2240/30—Casings or housings
    • 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
    • F04C2240/40—Electric motor
    • 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
    • F04C2240/805—Fastening means, e.g. bolts
    • 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
    • F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/301—Retaining bolts or nuts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Description

本発明は、スイッチング素子を備える電動圧縮機に関する。 The present invention relates to an electric compressor including a switching element.

例えば特許文献１に開示されているように、電動圧縮機は、冷媒を圧縮して吐出する圧縮部と、圧縮部を駆動させる電動モータと、電動モータを駆動させるためのモータ駆動回路とを備えている。モータ駆動回路は、ハウジングの外面に取り付けられたカバーとハウジングの外面とともに区画された収容空間に収容されている。また、モータ駆動回路は、基板に実装された複数のスイッチング素子を有する。そして、各スイッチング素子のスイッチング動作によって、バッテリ（直流電源）からの直流電圧が交流電圧に変換され、交流電圧が駆動電圧として電動モータに印加されることにより、電動モータの駆動が制御される。 For example, as disclosed in Patent Document 1, an electric compressor includes a compression unit that compresses and discharges a refrigerant, an electric motor that drives the compression unit, and a motor drive circuit for driving the electric motor. ing. The motor drive circuit is housed in a storage space partitioned by a cover attached to the outer surface of the housing and the outer surface of the housing. Further, the motor drive circuit has a plurality of switching elements mounted on the substrate. Then, the DC voltage from the battery (DC power supply) is converted into an AC voltage by the switching operation of each switching element, and the AC voltage is applied to the electric motor as a drive voltage to control the drive of the electric motor.

特開２０１６−１５３６０６号公報Japanese Unexamined Patent Publication No. 2016-153606

ところで、スイッチング素子は、スイッチング動作によって発熱する。そして、スイッチング素子のスイッチング動作により生じる発熱量が多くなって、スイッチング素子の温度が、スイッチング素子の耐熱温度を越えてしまうと、スイッチング素子が破損してしまう虞がある。スイッチング素子の温度上昇を抑制するため、例えば、収容空間を区画したカバーを大型化し、カバーの表面積を広くすることなどが考えられるが、電動圧縮機が大型化してしまい好ましくない。 By the way, the switching element generates heat due to the switching operation. If the amount of heat generated by the switching operation of the switching element increases and the temperature of the switching element exceeds the heat resistant temperature of the switching element, the switching element may be damaged. In order to suppress the temperature rise of the switching element, for example, it is conceivable to increase the size of the cover that divides the accommodation space and increase the surface area of the cover, but this is not preferable because the electric compressor becomes large.

本発明の目的は、大型化を抑制しつつスイッチング素子の放熱性を高めることができる電動圧縮機を提供することにある。 An object of the present invention is to provide an electric compressor capable of improving heat dissipation of a switching element while suppressing an increase in size.

上記問題点を解決するための電動圧縮機は、回転軸と、前記回転軸を回転させる電動モータと、前記回転軸が回転することにより駆動して冷媒を圧縮する圧縮部と、前記回転軸と前記電動モータと前記圧縮部とを収容するハウジングと、直流電圧を交流電圧に変換しつつ前記電動モータに印加するスイッチング素子が実装される基板と、前記ハウジングの外面に取り付けられ前記ハウジングとともに前記基板を収容する収容空間を形成し、前記基板に対し間隔を空けて平行に対向する天板部を有するカバーと、前記ハウジングの外面、及び前記天板部の外面に設けられ、ボルトが挿通されるボルト挿通孔を有する取付脚部と、前記ボルト挿通孔が前記取付脚部を貫通する第１方向に交差した第２方向に沿って前記取付脚部の外面から前記天板部の外面に延在したリブと、を有し、前記スイッチング素子は、前記基板に設定された素子配置領域に配置され、前記天板部を平面視した場合、前記リブは、少なくとも一部が前記素子配置領域に重合する位置に配置されていることを要旨とする。 The electric compressor for solving the above problems includes a rotating shaft, an electric motor that rotates the rotating shaft, a compression unit that is driven by the rotation of the rotating shaft to compress the refrigerant, and the rotating shaft. A housing that accommodates the electric motor and the compression unit, a substrate on which a switching element that applies a switching element to the electric motor while converting a DC voltage into an AC voltage is mounted, and a substrate that is attached to the outer surface of the housing and together with the housing. A cover having a top plate portion that faces the substrate in parallel with a space, and a cover provided on the outer surface of the housing and the outer surface of the top plate portion, through which a bolt is inserted. A mounting leg having a bolt insertion hole and a second direction in which the bolt insertion hole intersects the first direction through the mounting leg extends from the outer surface of the mounting leg to the outer surface of the top plate. The switching element is arranged in the element arrangement region set on the substrate, and when the top plate portion is viewed in a plan view, at least a part of the rib is superimposed on the element arrangement region. The gist is that it is placed in the position where it is to be used.

これによれば、スイッチング素子のスイッチング動作によって生じる熱は、カバーの天板部に伝わる。天板部に設けたリブは、スイッチング素子の配置された素子配置領域に重合しているため、天板部に伝わった熱をリブに効率良く伝えることができ、リブから収容空間外へ放出することができる。そして、リブは、取付脚部を補強するために設けられている。したがって、スイッチング素子の温度上昇を抑制するため、例えば、収容空間を区画したカバーを大型化したりする必要がなく、電動圧縮機の大型化を抑制しつつスイッチング素子の放熱性を高めることができる。 According to this, the heat generated by the switching operation of the switching element is transferred to the top plate portion of the cover. Since the ribs provided on the top plate are polymerized in the element arrangement region where the switching elements are arranged, the heat transferred to the top plate can be efficiently transferred to the ribs and discharged from the ribs to the outside of the accommodation space. be able to. The ribs are provided to reinforce the mounting legs. Therefore, in order to suppress the temperature rise of the switching element, for example, it is not necessary to increase the size of the cover that divides the accommodation space, and it is possible to improve the heat dissipation of the switching element while suppressing the increase in size of the electric compressor.

また、電動圧縮機について、前記リブは、前記第１方向に沿って間隔を空けて複数並設され、前記天板部には、前記第１方向に隣り合う前記リブに挟まれた領域が形成されており、前記天板部を平面視した場合、前記リブ、及び前記リブに挟まれた領域は前記素子配置領域に対向していてもよい。 Further, with respect to the electric compressor, a plurality of the ribs are arranged side by side at intervals along the first direction, and a region sandwiched between the ribs adjacent to the first direction is formed on the top plate portion. When the top plate portion is viewed in a plan view, the rib and the region sandwiched between the ribs may face the element arrangement region.

これによれば、スイッチング素子のスイッチング動作によって生じる熱は、カバーの天板部のうち、リブと重合する位置、及びリブで挟まれた領域に伝わる。そして、天板部に伝わった熱を、天板部から複数のリブに効率良く伝えることができ、天板部に伝わった熱を収容空間外へ効率良く放出することができる。 According to this, the heat generated by the switching operation of the switching element is transferred to the position where the cover overlaps with the rib and the region sandwiched between the ribs in the top plate portion of the cover. Then, the heat transferred to the top plate portion can be efficiently transferred from the top plate portion to the plurality of ribs, and the heat transferred to the top plate portion can be efficiently discharged to the outside of the accommodation space.

また、電動圧縮機について、前記天板部は前記ボルト挿通孔に向けて凹む凹部を有していてもよい。
これによれば、スイッチング素子のスイッチング動作によって生じる熱は、凹部の内側から取付脚部に伝わる。取付脚部にはリブが連結されているため、取付脚部に伝わった熱をリブに効率良く伝え、リブから放出できる。 Further, with respect to the electric compressor, the top plate portion may have a recess recessed toward the bolt insertion hole.
According to this, the heat generated by the switching operation of the switching element is transferred from the inside of the recess to the mounting leg. Since the ribs are connected to the mounting legs, the heat transferred to the mounting legs can be efficiently transferred to the ribs and released from the ribs.

本発明によれば、大型化を抑制しつつスイッチング素子の放熱性を高めることができる。 According to the present invention, it is possible to improve the heat dissipation of the switching element while suppressing the increase in size.

実施形態の電動圧縮機の側断面図。A side sectional view of the electric compressor of the embodiment. 収容空間に収容されたモータ駆動回路の基板及び素子配置領域を示す正面図。The front view which shows the substrate and the element arrangement area of the motor drive circuit accommodated in the accommodation space. 実施形態の電動圧縮機の取付状態であり、天板部を平面視した図。It is the attached state of the electric compressor of an embodiment, and is the figure which looked at the top plate part in a plan view. 実施形態の電動圧縮機の第３取付脚部及びリブを示す部分斜視図。FIG. 3 is a partial perspective view showing a third mounting leg and ribs of the electric compressor of the embodiment. カバーを内面側から示す正面図。Front view showing the cover from the inner surface side.

以下、電動圧縮機を具体化した一実施形態を図１〜図５にしたがって説明する。
図１に示すように、電動圧縮機１０のハウジング１１は、一端（図１の左端）に開口１２ａが形成された有底筒状をなすモータハウジング１２と、モータハウジング１２の一端に連結された有底筒状をなす吐出ハウジング１３と、を有している。モータハウジング１２の底壁１２ｂ側には、一端（図１の左端）に開口１４ａが形成された有底筒状をなすカバー１４が取り付けられている。モータハウジング１２、吐出ハウジング１３、及びカバー１４それぞれはアルミニウム合金のダイカスト鋳物によって製作されている。 Hereinafter, an embodiment in which the electric compressor is embodied will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1, the housing 11 of the electric compressor 10 is connected to a bottomed cylindrical motor housing 12 having an opening 12a formed at one end (left end of FIG. 1) and one end of the motor housing 12. It has a bottomed cylindrical discharge housing 13. A bottomed cylindrical cover 14 having an opening 14a formed at one end (left end in FIG. 1) is attached to the bottom wall 12b side of the motor housing 12. The motor housing 12, the discharge housing 13, and the cover 14 are each made of die-cast aluminum alloy.

モータハウジング１２と吐出ハウジング１３との間には吐出室Ｓ１が区画されている。モータハウジング１２と吐出ハウジング１３とは、４本のボルトＢ１（図１では２本のボルトＢ１のみ図示）によって共締めされるとともに、モータハウジング１２とカバー１４とは、６本のボルトＢ２（図１では３本のボルトＢ２のみ図示）によって共締めされている。モータハウジング１２と吐出ハウジング１３との間にはガスケットＧ１が介装されるとともに、モータハウジング１２とカバー１４との間にはガスケットＧ２が介装されている。 A discharge chamber S1 is partitioned between the motor housing 12 and the discharge housing 13. The motor housing 12 and the discharge housing 13 are fastened together by four bolts B1 (only two bolts B1 are shown in FIG. 1), and the motor housing 12 and the cover 14 are fastened together with six bolts B2 (FIG. 1). In No. 1, only three bolts B2 are fastened together (shown). A gasket G1 is interposed between the motor housing 12 and the discharge housing 13, and a gasket G2 is interposed between the motor housing 12 and the cover 14.

吐出ハウジング１３の底壁には吐出ポート１５が形成されており、吐出ポート１５には図示しない外部冷媒回路が接続されている。モータハウジング１２の周壁１２ｃには図示しない吸入ポートが形成されており、吸入ポートには外部冷媒回路が接続されている。 A discharge port 15 is formed on the bottom wall of the discharge housing 13, and an external refrigerant circuit (not shown) is connected to the discharge port 15. A suction port (not shown) is formed on the peripheral wall 12c of the motor housing 12, and an external refrigerant circuit is connected to the suction port.

モータハウジング１２内には回転軸１６が収容されている。さらに、モータハウジング１２内には、冷媒を圧縮する圧縮部１７と、圧縮部１７を駆動する電動モータ１８とが収容されている。電動モータ１８は、回転軸１６を駆動させる。圧縮部１７は、回転軸１６が回転することにより駆動する。電動モータ１８は、圧縮部１７よりもモータハウジング１２の底壁１２ｂ（図１の右側）寄りに配置されている。 The rotating shaft 16 is housed in the motor housing 12. Further, a compression unit 17 for compressing the refrigerant and an electric motor 18 for driving the compression unit 17 are housed in the motor housing 12. The electric motor 18 drives the rotating shaft 16. The compression unit 17 is driven by the rotation of the rotation shaft 16. The electric motor 18 is arranged closer to the bottom wall 12b (right side in FIG. 1) of the motor housing 12 than the compression unit 17.

モータハウジング１２内において、圧縮部１７と電動モータ１８との間には軸支部材１９が設けられている。軸支部材１９の中央部には、回転軸１６の一端部が挿通される挿通孔１９ａが形成されている。挿通孔１９ａと回転軸１６の一端部との間にはラジアルベアリング１６ａが設けられている。回転軸１６の一端部は、ラジアルベアリング１６ａを介して軸支部材１９に回転可能に支持されている。 In the motor housing 12, a shaft support member 19 is provided between the compression unit 17 and the electric motor 18. An insertion hole 19a through which one end of the rotating shaft 16 is inserted is formed in the central portion of the shaft support member 19. A radial bearing 16a is provided between the insertion hole 19a and one end of the rotating shaft 16. One end of the rotating shaft 16 is rotatably supported by the shaft support member 19 via a radial bearing 16a.

モータハウジング１２の底壁１２ｂには、軸受部１２ｄが凹設されている。軸受部１２ｄの内側には回転軸１６の他端部が挿入されている。軸受部１２ｄと回転軸１６の他端部との間にはラジアルベアリング１６ｂが設けられている。回転軸１６の他端部は、ラジアルベアリング１６ｂを介して軸受部１２ｄに回転可能に支持されている。 A bearing portion 12d is recessed in the bottom wall 12b of the motor housing 12. The other end of the rotating shaft 16 is inserted inside the bearing portion 12d. A radial bearing 16b is provided between the bearing portion 12d and the other end of the rotating shaft 16. The other end of the rotating shaft 16 is rotatably supported by the bearing portion 12d via the radial bearing 16b.

圧縮部１７は、モータハウジング１２内に固定された固定スクロール１７ａと、固定スクロール１７ａに対向配置された可動スクロール１７ｂとを備える。固定スクロール１７ａと可動スクロール１７ｂとの間には容積変更可能な圧縮室Ｓ３が区画形成されている。圧縮室Ｓ３の容積変更により圧縮された冷媒は、吐出室Ｓ１に吐出される。電動モータ１８は、回転軸１６と一体的に回転するロータ２１（回転子）と、ロータ２１を取り囲むようにモータハウジング１２の内周面に固定されたステータ２２（固定子）とから構成されている。 The compression unit 17 includes a fixed scroll 17a fixed in the motor housing 12 and a movable scroll 17b arranged to face the fixed scroll 17a. A volume-changeable compression chamber S3 is formed between the fixed scroll 17a and the movable scroll 17b. The refrigerant compressed by changing the volume of the compression chamber S3 is discharged to the discharge chamber S1. The electric motor 18 is composed of a rotor 21 (rotor) that rotates integrally with the rotating shaft 16 and a stator 22 (stator) that is fixed to the inner peripheral surface of the motor housing 12 so as to surround the rotor 21. There is.

図１又は図３に示すように、電動圧縮機１０のハウジングには、エンジンＥ（被取付体）に電動圧縮機１０を取り付けるために第１〜第３取付脚部２３〜２５が設けられている。モータハウジング１２の周壁１２ｃの上部外面には、回転軸１６の径方向に沿って細長に延びる筒状の第１取付脚部２３が一体形成されるとともに、第１取付脚部２３内には、回転軸１６の径方向に沿って延びる第１ボルト挿通孔２３ａが形成されている。また、モータハウジング１２の周壁１２ｃの下部外面には、回転軸１６の径方向に沿って細長に延びる筒状の第２取付脚部２４が一体形成されるとともに、第２取付脚部２４内には、回転軸１６の径方向に沿って延びる第２ボルト挿通孔２４ａが形成されている。 As shown in FIG. 1 or 3, the housing of the electric compressor 10 is provided with first to third mounting legs 23 to 25 for mounting the electric compressor 10 on the engine E (attached body). There is. A cylindrical first mounting leg 23 extending elongated along the radial direction of the rotating shaft 16 is integrally formed on the upper outer surface of the peripheral wall 12c of the motor housing 12, and inside the first mounting leg 23, A first bolt insertion hole 23a extending along the radial direction of the rotating shaft 16 is formed. Further, on the lower outer surface of the peripheral wall 12c of the motor housing 12, a cylindrical second mounting leg portion 24 extending elongated along the radial direction of the rotating shaft 16 is integrally formed, and inside the second mounting leg portion 24. Is formed with a second bolt insertion hole 24a extending along the radial direction of the rotating shaft 16.

また、カバー１４には、回転軸１６の径方向に沿って細長に延びる筒状の第３取付脚部２５が一体形成されている。第３取付脚部２５は、長手方向の一端側に第１筒状部２５１を備え、長手方向の他端側に第２筒状部２５２を備える。第３取付脚部２５は、長手方向に沿った第１筒状部２５１と第２筒状部２５２の間に、肉抜き部２５３を備える。第３取付脚部２５には、第１筒状部２５１及び第２筒状部２５２を貫通する第３ボルト挿通孔２５ａが形成されている。 Further, the cover 14 is integrally formed with a tubular third mounting leg 25 that extends elongated along the radial direction of the rotating shaft 16. The third mounting leg portion 25 includes a first tubular portion 251 on one end side in the longitudinal direction and a second tubular portion 252 on the other end side in the longitudinal direction. The third mounting leg portion 25 includes a lightening portion 253 between the first tubular portion 251 and the second tubular portion 252 along the longitudinal direction. The third mounting leg portion 25 is formed with a third bolt insertion hole 25a that penetrates the first cylindrical portion 251 and the second tubular portion 252.

そして、電動圧縮機１０は、第１取付脚部２３からエンジンＥの第１ボス部Ｅ１に、第２取付脚部２４からエンジンＥの第２ボス部Ｅ２に、第３取付脚部２５からエンジンＥの第３ボス部Ｅ３に締結部材としてのボルトＢ３を締結することにより、エンジンＥの側面に取り付けられている。 Then, the electric compressor 10 is transferred from the first mounting leg 23 to the first boss E1 of the engine E, from the second mounting leg 24 to the second boss E2 of the engine E, and from the third mounting leg 25 to the engine. It is attached to the side surface of the engine E by fastening the bolt B3 as a fastening member to the third boss portion E3 of the E.

図１に示すように、電動圧縮機１０において、モータハウジング１２の底壁１２ｂ側には、カバー１４に向けて突出する筒状の環状壁部１２ｅが設けられている。モータハウジング１２の底壁１２ｂには、カバー１４に向けて突出する基板支持部１２ｆが複数設けられ、基板支持部１２ｆにモータ駆動回路３０が支持されている。 As shown in FIG. 1, in the electric compressor 10, a cylindrical annular wall portion 12e projecting toward the cover 14 is provided on the bottom wall 12b side of the motor housing 12. The bottom wall 12b of the motor housing 12 is provided with a plurality of substrate support portions 12f protruding toward the cover 14, and the motor drive circuit 30 is supported by the substrate support portions 12f.

カバー１４は、略円盤状の天板部１４ｂと、天板部１４ｂからモータハウジング１２に向けて突出する筒状の周壁部１４ｃとを備える。周壁部１４ｃとモータハウジング１２の環状壁部１２ｅとの間にガスケットＧ２が介装されている。そして、モータハウジング１２の底壁１２ｂと、環状壁部１２ｅと、カバー１４の周壁部１４ｃと、天板部１４ｂとによって収容空間Ｓが区画されている。 The cover 14 includes a substantially disk-shaped top plate portion 14b and a cylindrical peripheral wall portion 14c protruding from the top plate portion 14b toward the motor housing 12. A gasket G2 is interposed between the peripheral wall portion 14c and the annular wall portion 12e of the motor housing 12. The accommodation space S is divided by the bottom wall 12b of the motor housing 12, the annular wall portion 12e, the peripheral wall portion 14c of the cover 14, and the top plate portion 14b.

上記収容空間Ｓ内には、電動モータ１８を駆動するためのモータ駆動回路３０が収容されている。モータ駆動回路３０はインバータよりなり、図示しないエアコンＥＣＵからの指令に基づいて、図示しない電源から電動モータ１８のステータ２２に電力を供給する。 A motor drive circuit 30 for driving the electric motor 18 is housed in the accommodation space S. The motor drive circuit 30 includes an inverter, and supplies electric power to the stator 22 of the electric motor 18 from a power source (not shown) based on a command from an air conditioner ECU (not shown).

図２に示すように、モータ駆動回路３０は、環状壁部１２ｅの内側に収容された平板状の基板３１と、この基板３１に実装された複数種類の電気部品３４とからなっている。基板３１は、基板支持部１２ｆによって底壁１２ｂから離れた状態で環状壁部１２ｅの内側に配置されている。電気部品３４はインバータを構成する周知の部品、すなわち、スイッチング素子、電解コンデンサ、トランス、ドライバ、固定抵抗等である。電気部品３４のうちの一つのスイッチング素子３５は、電源からの直流電圧を交流電圧に変換しつつ電動モータ１８に印加する。また、スイッチング素子３５は基板３１のほぼ中央に実装されている。 As shown in FIG. 2, the motor drive circuit 30 includes a flat plate-shaped substrate 31 housed inside the annular wall portion 12e, and a plurality of types of electric components 34 mounted on the substrate 31. The substrate 31 is arranged inside the annular wall portion 12e in a state of being separated from the bottom wall 12b by the substrate support portion 12f. The electric component 34 is a well-known component that constitutes an inverter, that is, a switching element, an electrolytic capacitor, a transformer, a driver, a fixed resistor, and the like. The switching element 35, which is one of the electric components 34, applies the DC voltage from the power supply to the electric motor 18 while converting it into an AC voltage. Further, the switching element 35 is mounted substantially in the center of the substrate 31.

図２の２点鎖線に示すように、基板３１には、スイッチング素子３５を配置するための素子配置領域Ｄが設定されている。素子配置領域Ｄは、図示しないスイッチング素子用基板の外形線によって囲まれる領域である。素子配置領域Ｄは、基板３１のほぼ中央に設定され、略四角形状である。なお、基板３１には、その他の電気部品３４を配置するための配置領域Ｆが予め設定され、各配置領域Ｆに、その他の電気部品３４が実装されている。 As shown by the alternate long and short dash line in FIG. 2, an element arrangement region D for arranging the switching element 35 is set on the substrate 31. The element arrangement area D is an area surrounded by an outline of a switching element substrate (not shown). The element arrangement area D is set substantially in the center of the substrate 31 and has a substantially quadrangular shape. An arrangement area F for arranging the other electric components 34 is set in advance on the substrate 31, and the other electric components 34 are mounted on each arrangement area F.

図１に示すように、カバー１４の天板部１４ｂは、収容空間Ｓに面する内面１４ｄと、内面１４ｄに平行で、かつ電動圧縮機１０の外に面する外面１４ｅを有する。カバー１４において、天板部１４ｂの内面１４ｄは基板３１に対し間隔を空けて平行に対向している。そして、天板部１４ｂの内面１４ｄ及び基板３１は、回転軸１６の軸線に対し垂直となるように設けられている。 As shown in FIG. 1, the top plate portion 14b of the cover 14 has an inner surface 14d facing the accommodation space S and an outer surface 14e parallel to the inner surface 14d and facing the outer side of the electric compressor 10. In the cover 14, the inner surface 14d of the top plate portion 14b faces the substrate 31 in parallel with a gap. The inner surface 14d of the top plate portion 14b and the substrate 31 are provided so as to be perpendicular to the axis of the rotating shaft 16.

天板部１４ｂの内面１４ｄと外面１４ｅを結ぶ方向を天板部１４ｂの厚さ方向とする。第３取付脚部２５において、第３ボルト挿通孔２５ａが貫通する方向を第１方向Ｙ１とし、第１方向Ｙ１に交差する方向を第２方向Ｙ２とする。本実施形態では、第２方向Ｙ２は第１方向Ｙ１に直交し、第３ボルト挿通孔２５ａの径方向と一致する。 The direction connecting the inner surface 14d and the outer surface 14e of the top plate portion 14b is defined as the thickness direction of the top plate portion 14b. In the third mounting leg portion 25, the direction through which the third bolt insertion hole 25a penetrates is defined as the first direction Y1, and the direction intersecting the first direction Y1 is defined as the second direction Y2. In the present embodiment, the second direction Y2 is orthogonal to the first direction Y1 and coincides with the radial direction of the third bolt insertion hole 25a.

図３又は図４に示すように、カバー１４における天板部１４ｂの外面１４ｅには、第２方向Ｙ２に第３取付脚部２５を挟むように第１リブ４１が設けられている。各第１リブ４１は、第１方向Ｙ１に長手が延びるように外面１４ｅに設けられている。各第１リブ４１は、第２方向Ｙ２に沿って第３取付脚部２５から離れた位置に設けられている。本実施形態では、一対の第１リブ４１のうち、上側の第１リブ４１は、下側の第１リブ４１に比べて第３取付脚部２５に近い位置に設けられている。 As shown in FIG. 3 or 4, the outer surface 14e of the top plate portion 14b of the cover 14 is provided with a first rib 41 so as to sandwich the third mounting leg portion 25 in the second direction Y2. Each of the first ribs 41 is provided on the outer surface 14e so as to extend in the first direction Y1. Each first rib 41 is provided at a position away from the third mounting leg 25 along the second direction Y2. In the present embodiment, of the pair of first ribs 41, the upper first rib 41 is provided at a position closer to the third mounting leg 25 than the lower first rib 41.

各第１リブ４１と、第３取付脚部２５とは互いに平行である。各第１リブ４１において、天板部１４ｂの外面１４ｅからの突出方向の先端を突出端４１ａとする。第３取付脚部２５において、天板部１４ｂの外面１４ｅからの突出方向の先端を突出端２５ｂとする。天板部１４ｂの外面１４ｅから第１リブ４１の突出端４１ａまでの寸法Ｈ１は、天板部１４ｂの外面１４ｅから第３取付脚部２５の突出端２５ｂまでの寸法Ｈ２よりも小さい。 Each of the first ribs 41 and the third mounting leg 25 are parallel to each other. In each first rib 41, the tip of the top plate portion 14b in the protruding direction from the outer surface 14e is defined as the protruding end 41a. In the third mounting leg portion 25, the tip of the top plate portion 14b in the projecting direction from the outer surface 14e is defined as the protruding end 25b. The dimension H1 from the outer surface 14e of the top plate portion 14b to the protruding end 41a of the first rib 41 is smaller than the dimension H2 from the outer surface 14e of the top plate portion 14b to the protruding end 25b of the third mounting leg portion 25.

カバー１４における天板部１４ｂの外面１４ｅには、第３取付脚部２５と各第１リブ４１に架け渡された第２リブ４２が複数設けられている。各第２リブ４２は、第３取付脚部２５の外面から天板部１４ｂの外面１４ｅに延在している。第２リブ４２は、第２方向Ｙ２に対向する第１リブ４１と第３取付脚部２５の側面に架け渡され、第１リブ４１と第３取付脚部２５を連結している。第２リブ４２は、第１リブ４１の突出端４１ａから第３取付脚部２５の突出端２５ｂに向けて傾斜した形状である。複数の第２リブ４２は、第１方向Ｙ１に隣り合う第２リブ４２同士の間に間隔を空けて設けられている。 The outer surface 14e of the top plate portion 14b of the cover 14 is provided with a plurality of third mounting legs 25 and a plurality of second ribs 42 bridged to each of the first ribs 41. Each of the second ribs 42 extends from the outer surface of the third mounting leg portion 25 to the outer surface 14e of the top plate portion 14b. The second rib 42 is bridged between the first rib 41 facing the second direction Y2 and the side surface of the third mounting leg portion 25, and connects the first rib 41 and the third mounting leg portion 25. The second rib 42 has a shape inclined from the protruding end 41a of the first rib 41 toward the protruding end 25b of the third mounting leg portion 25. The plurality of second ribs 42 are provided at intervals between the second ribs 42 adjacent to each other in the first direction Y1.

第３取付脚部２５から一方（上側）の第１リブ４１に向けて延びる第２リブ４２と、第３取付脚部２５から他方（下側）の第１リブ４１に向けて延びる第２リブ４２とでは、第２方向Ｙ２方向への寸法が異なる。本実施形態では、第３取付脚部２５から上側の第１リブ４１に向けて延びる第２リブ４２の方が、第３取付脚部２５から下側の第１リブ４１に向けて第２リブ４２よりも短い。 A second rib 42 extending from the third mounting leg 25 toward the first rib 41 on one side (upper side) and a second rib extending from the third mounting leg 25 toward the first rib 41 on the other side (lower side). The dimensions in the second direction Y2 direction are different from those of 42. In the present embodiment, the second rib 42 extending from the third mounting leg 25 toward the upper first rib 41 is the second rib extending from the third mounting leg 25 toward the lower first rib 41. Shorter than 42.

図５に示すように、カバー１４の天板部１４ｂには、厚さ方向に沿って内面１４ｄから第３取付脚部２５の第３ボルト挿通孔２５ａに向けて凹む凹部２６が設けられている。凹部２６のうち、第１筒状部２５１及び第２筒状部２５２に向けて凹む部分は、肉抜き部２５３に向けて凹む部分よりも深く凹んでいる。 As shown in FIG. 5, the top plate portion 14b of the cover 14 is provided with a recess 26 that is recessed from the inner surface 14d toward the third bolt insertion hole 25a of the third mounting leg portion 25 along the thickness direction. .. The portion of the recess 26 that is recessed toward the first cylindrical portion 251 and the second tubular portion 252 is recessed deeper than the portion that is recessed toward the lightening portion 253.

図３に示すように、天板部１４ｂを平面視した場合、一対の第１リブ４１を第２方向Ｙ２の両端縁とし、一対の第１リブ４１の長手方向一端同士及び長手方向他端同士を第２方向Ｙ２に繋ぐ仮想線Ｌを第１方向Ｙ１の両端縁とする四角形状の領域を、リブ配置領域Ｒとする。リブ配置領域Ｒは、第１方向Ｙ１に隣り合う第２リブ４２の間に位置するリブ間領域Ｒａも含んでいる。そして、リブ配置領域Ｒ内に第１リブ４１及び第２リブ４２が配置されている。 As shown in FIG. 3, when the top plate portion 14b is viewed in a plan view, the pair of first ribs 41 are the edges of both ends of the second direction Y2, and the pair of first ribs 41 are one end in the longitudinal direction and the other end in the longitudinal direction. A quadrangular region in which the virtual line L connecting the above to the second direction Y2 is both end edges of the first direction Y1 is defined as a rib arrangement region R. The rib arrangement region R also includes an inter-rib region Ra located between the second ribs 42 adjacent to the first direction Y1. The first rib 41 and the second rib 42 are arranged in the rib arrangement region R.

天板部１４ｂを平面視した場合において、リブ配置領域Ｒの一部は、モータ駆動回路３０の素子配置領域Ｄに重合している。このため、リブ配置領域Ｒに配置された第１リブ４１及び第２リブ４２のうち、天板部１４ｂの中央部付近に位置する上側の第１リブ４１の一部、及び上側の複数の第２リブ４２のうち、第２筒状部２５２寄りの複数の第２リブ４２の一部は、素子配置領域Ｄに重合し、スイッチング素子３５に重合している。 When the top plate portion 14b is viewed in a plan view, a part of the rib arrangement region R is overlapped with the element arrangement region D of the motor drive circuit 30. Therefore, of the first rib 41 and the second rib 42 arranged in the rib arrangement region R, a part of the upper first rib 41 located near the central portion of the top plate portion 14b, and a plurality of upper ribs 41. Of the two ribs 42, a part of the plurality of second ribs 42 closer to the second tubular portion 252 is polymerized in the element arrangement region D and is polymerized in the switching element 35.

したがって、天板部１４ｂの内面１４ｄのうち、天板部１４ｂの中央部付近に位置する上側の第１リブ４１が設けられた場所、及び上側の第２リブ４２のうち、第２筒状部２５２寄りの複数の第２リブ４２が設けられた場所は、スイッチング素子３５の一部に対向している。また、凹部２６のうち、第２筒状部２５２に位置する第３ボルト挿通孔２５ａに設けて凹む部分もスイッチング素子３５に重合している。凹部２６は、リブ配置領域Ｒに配置された第３取付脚部２５の第３ボルト挿通孔２５ａに向けて凹むため、凹部２６は、リブ配置領域Ｒに配置されている。 Therefore, of the inner surface 14d of the top plate portion 14b, the place where the upper first rib 41 located near the central portion of the top plate portion 14b is provided, and the second tubular portion of the upper second rib 42. The location where the plurality of second ribs 42 closer to 252 are provided faces a part of the switching element 35. Further, of the recess 26, a portion provided in the third bolt insertion hole 25a located in the second tubular portion 252 and recessed is also superposed on the switching element 35. Since the recess 26 is recessed toward the third bolt insertion hole 25a of the third mounting leg 25 arranged in the rib arrangement region R, the recess 26 is arranged in the rib arrangement region R.

上記実施形態によれば、以下のような作用効果を得ることができる。
（１）天板部１４ｂを平面視した場合、基板３１の素子配置領域Ｄに第２リブ４２の一部が重合している。そして、第２リブ４２によってカバー１４の表面積を広げ、スイッチング素子３５のスイッチング動作により生じる熱をカバー１４から収容空間Ｓ外へ効率良く放出することができる。第２リブ４２は、第３取付脚部２５を補強するために設けられている。したがって、スイッチング素子３５の温度上昇を抑制するため、例えば、収容空間Ｓを区画したカバー１４を大型化し、カバー１４の表面積を広くして放熱性を高める場合と異なり、カバー１４、ひいては電動圧縮機１０の大型化を抑制しつつスイッチング素子３５の放熱性を高めることができる。 According to the above embodiment, the following effects can be obtained.
(1) When the top plate portion 14b is viewed in a plan view, a part of the second rib 42 is superimposed on the element arrangement region D of the substrate 31. Then, the surface area of the cover 14 can be increased by the second rib 42, and the heat generated by the switching operation of the switching element 35 can be efficiently released from the cover 14 to the outside of the accommodation space S. The second rib 42 is provided to reinforce the third mounting leg portion 25. Therefore, in order to suppress the temperature rise of the switching element 35, for example, unlike the case where the cover 14 in which the accommodation space S is partitioned is enlarged and the surface area of the cover 14 is increased to improve the heat dissipation, the cover 14 and eventually the electric compressor It is possible to improve the heat dissipation of the switching element 35 while suppressing the increase in size of 10.

（２）天板部１４ｂを平面視した場合、基板３１の素子配置領域Ｄに複数の第２リブ４２及びリブ間領域Ｒａの一部が重合している。よって、複数の第２リブ４２により、天板部１４ｂの表面積をより一層、広げることができ、スイッチング素子３５のスイッチング動作により生じる熱をカバー１４から収容空間Ｓ外へ効率良く放出することができる。 (2) When the top plate portion 14b is viewed in a plan view, a plurality of second ribs 42 and a part of the inter-rib region Ra are overlapped with the element arrangement region D of the substrate 31. Therefore, the surface area of the top plate portion 14b can be further expanded by the plurality of second ribs 42, and the heat generated by the switching operation of the switching element 35 can be efficiently discharged from the cover 14 to the outside of the accommodation space S. ..

（３）第２リブ４２は、第３取付脚部２５の外面に連結され、天板部１４ｂには第３取付脚部２５の第３ボルト挿通孔２５ａに向けて凹む凹部２６が設けられている。そして、スイッチング素子３５のスイッチング動作により生じる熱を、凹部２６の内側から第３取付脚部２５に伝え、その第３取付脚部２５から第２リブ４２に伝えることができる。よって、カバー１４が備える第２リブ４２及び凹部２６を利用して、スイッチング素子３５のスイッチング動作により生じる熱をカバー１４から収容空間Ｓ外へ効率良く放出することができる。 (3) The second rib 42 is connected to the outer surface of the third mounting leg portion 25, and the top plate portion 14b is provided with a recess 26 recessed toward the third bolt insertion hole 25a of the third mounting leg portion 25. There is. Then, the heat generated by the switching operation of the switching element 35 can be transferred from the inside of the recess 26 to the third mounting leg 25, and then transferred from the third mounting leg 25 to the second rib 42. Therefore, the heat generated by the switching operation of the switching element 35 can be efficiently discharged from the cover 14 to the outside of the accommodation space S by utilizing the second rib 42 and the recess 26 included in the cover 14.

（４）凹部２６のうち、第２筒状部２５２に位置する第３ボルト挿通孔２５ａに向けて凹む部分は、肉抜き部２５３に向けて凹む部分よりも深く凹む。その第２筒状部２５２に位置する第３ボルト挿通孔２５ａに向けて凹む部分が素子配置領域Ｄに重合しているため、スイッチング素子３５に生じた熱を凹部２６へ効果的に逃がすことができる。 (4) Of the recesses 26, the portion recessed toward the third bolt insertion hole 25a located in the second tubular portion 252 is recessed deeper than the portion recessed toward the lightening portion 253. Since the portion recessed toward the third bolt insertion hole 25a located in the second cylindrical portion 252 is polymerized in the element arrangement region D, the heat generated in the switching element 35 can be effectively released to the recess 26. can.

（５）電動圧縮機１０は、第１〜第３取付脚部２３〜２５からエンジンＥの第１〜第３ボス部Ｅ１〜Ｅ３にボルトＢ３を締結することにより、エンジンＥに取り付けられている。第３取付脚部２５はカバー１４の天板部１４ｂに設けられ、天板部１４ｂは板状である。このため、第３取付脚部２５の第３ボルト挿通孔２５ａに挿通されたボルトＢ３を第３ボス部Ｅ３に締結した際、軸力によって天板部１４ｂが撓みやすいが、第１リブ４１及び第２リブ４２によって天板部１４ｂの撓みを抑制でき、ガスケットＧ２によって収容空間Ｓをシールした状態を維持できる。 (5) The electric compressor 10 is attached to the engine E by fastening bolts B3 from the first to third mounting legs 23 to 25 to the first to third boss portions E1 to E3 of the engine E. .. The third mounting leg portion 25 is provided on the top plate portion 14b of the cover 14, and the top plate portion 14b has a plate shape. Therefore, when the bolt B3 inserted into the third bolt insertion hole 25a of the third mounting leg 25 is fastened to the third boss portion E3, the top plate portion 14b is likely to bend due to the axial force, but the first rib 41 and The second rib 42 can suppress the bending of the top plate portion 14b, and the gasket G2 can maintain the state in which the accommodation space S is sealed.

（６）電動圧縮機１０は、第３取付脚部２５に連結された第２リブ４２に加え、第２リブ４２に連結された第１リブ４１を備える。よって、第１リブ４１及び第２リブ４２によってカバー１４の表面積を広げ、スイッチング素子３５のスイッチング動作により生じる熱をカバー１４から収容空間Ｓ外へ効率良く放出することができる。 (6) The electric compressor 10 includes a first rib 41 connected to the second rib 42 in addition to the second rib 42 connected to the third mounting leg 25. Therefore, the surface area of the cover 14 can be increased by the first rib 41 and the second rib 42, and the heat generated by the switching operation of the switching element 35 can be efficiently discharged from the cover 14 to the outside of the accommodation space S.

（７）第１リブ４１の寸法Ｈ１は、第３取付脚部２５の寸法Ｈ２よりも小さい。そして、第２リブ４２は、第１リブ４１の突出端４１ａから第３取付脚部２５の突出端２５ｂに向けて斜めに延びる形状である。よって、第２リブ４２の表面積を広くして、第２リブ４２の放熱性を高めることができる。 (7) The dimension H1 of the first rib 41 is smaller than the dimension H2 of the third mounting leg 25. The second rib 42 has a shape that extends obliquely from the protruding end 41a of the first rib 41 toward the protruding end 25b of the third mounting leg portion 25. Therefore, the surface area of the second rib 42 can be increased to improve the heat dissipation of the second rib 42.

なお、上記実施形態は以下のように変更してもよい。
○ 第２リブ４２は、素子配置領域Ｄと重合していれば、第３取付脚部２５を第２方向Ｙ２に挟むように一つずつ設けられていてもよい。また、第２リブ４２は、第３取付脚部２５を第２方向Ｙ２に挟む位置の片側だけに設けられていてもよい。 The above embodiment may be changed as follows.
○ The second ribs 42 may be provided one by one so as to sandwich the third mounting leg portion 25 in the second direction Y2 as long as it overlaps with the element arrangement region D. Further, the second rib 42 may be provided only on one side of the position where the third mounting leg portion 25 is sandwiched in the second direction Y2.

○ 天板部１４ｂを平面視した場合、素子配置領域Ｄに全ての第２リブ４２の全体が重合するように第２リブ４２を設けてもよい。
○ 第２リブ４２の数は適宜変更してもよい。 ○ When the top plate portion 14b is viewed in a plan view, the second rib 42 may be provided in the element arrangement region D so that the entire second rib 42 overlaps.
○ The number of the second ribs 42 may be changed as appropriate.

○ 第１方向Ｙ１に隣り合う第２リブ４２同士の間隔は適宜変更してもよい。
○ 第３取付脚部２５から上側の第１リブ４１に向けて延びる第２リブ４２と、第３取付脚部２５から下側の第１リブ４１に向けて延びる第２リブ４２とで、第２方向Ｙ２への寸法を同じにしてもよい。 ○ The distance between the second ribs 42 adjacent to each other in the first direction Y1 may be changed as appropriate.
○ The second rib 42 extending from the third mounting leg 25 toward the upper first rib 41 and the second rib 42 extending from the third mounting leg 25 toward the lower first rib 41. The dimensions in the two directions Y2 may be the same.

○ 第３取付脚部２５の第１方向Ｙ１に対し、第２リブ４２が交差する角度は適宜変更してもよい。
○ 第１リブ４１は無くてもよい。 ○ The angle at which the second rib 42 intersects with respect to the first direction Y1 of the third mounting leg 25 may be appropriately changed.
○ The first rib 41 may be omitted.

○ 天板部１４ｂの内面１４ｄから凹む凹部２６は無くてもよい。
○ 凹部２６の深さは、何れの場所で同じであってもよい。
○ 第３取付脚部２５の肉抜き部２５３は無くてもよい。 ○ There may be no recess 26 recessed from the inner surface 14d of the top plate portion 14b.
○ The depth of the recess 26 may be the same at any place.
○ The lightening portion 253 of the third mounting leg portion 25 may be omitted.

○ カバー１４は、周壁部１４ｃを備えず、天板部１４ｂだけの構成であってもよい。
○ 圧縮部１７は、固定スクロール１７ａと可動スクロール１７ｂとで構成されるタイプに限らず、例えば、ピストンタイプやベーンタイプなどに変更してもよい。 ○ The cover 14 may be configured not to have the peripheral wall portion 14c but only the top plate portion 14b.
○ The compression unit 17 is not limited to the type composed of the fixed scroll 17a and the movable scroll 17b, and may be changed to, for example, a piston type or a vane type.

○ ハウジング１１には取付脚部がさらに設けられていてもよい。
○ 電動圧縮機１０は、第１〜第３取付脚部２３〜２５の第１〜第３ボルト挿通孔２３ａ〜２５ａに挿通したボルトＢ３をエンジンＥ以外、例えば、エンジンルームを構成する部材に締結して取り付けられていてもよい。 ○ The housing 11 may be further provided with mounting legs.
○ The electric compressor 10 fastens the bolts B3 inserted into the first to third bolt insertion holes 23a to 25a of the first to third mounting legs 23 to 25 to a member other than the engine E, for example, a member constituting the engine room. It may be attached.

Ｄ…素子配置領域、Ｓ…収容空間、Ｂ１，Ｂ２，Ｂ３…ボルト、Ｙ１…第１方向、Ｙ２…第２方向、１０…電動圧縮機、１１…ハウジング、１４…カバー、１４ｂ…天板部、１４ｄ…内面、１４ｅ…外面、１６…回転軸、１７…圧縮部、１８…電動モータ、２５…第３取付脚部、２５ａ…第３ボルト挿通孔、２６…凹部、３１…基板、３５…スイッチング素子、４２…第２リブ。 D ... element placement area, S ... accommodation space, B1, B2, B3 ... bolts, Y1 ... first direction, Y2 ... second direction, 10 ... electric compressor, 11 ... housing, 14 ... cover, 14b ... top plate , 14d ... Inner surface, 14e ... Outer surface, 16 ... Rotating shaft, 17 ... Compressor, 18 ... Electric motor, 25 ... Third mounting leg, 25a ... Third bolt insertion hole, 26 ... Recess, 31 ... Board, 35 ... Switching element, 42 ... 2nd rib.

Claims (5)

回転軸と、
前記回転軸を回転させる電動モータと、
前記回転軸が回転することにより駆動して冷媒を圧縮する圧縮部と、
前記回転軸と前記電動モータと前記圧縮部とを収容するハウジングと、
直流電圧を交流電圧に変換しつつ前記電動モータに印加するスイッチング素子が実装される基板と、
前記ハウジングの外面に取り付けられ前記ハウジングとともに前記基板を収容する収容空間を形成し、前記基板に対し間隔を空けて平行に対向する天板部を有するカバーと、
前記ハウジングの外面、及び前記天板部の外面に設けられ、ボルトが挿通されるボルト挿通孔を有する取付脚部と、
前記ボルト挿通孔が前記取付脚部を貫通する第１方向に交差した第２方向に沿って前記取付脚部の外面から前記天板部の外面に延在したリブと、を有し、
前記スイッチング素子は、前記基板に設定された素子配置領域に配置され、
前記天板部を平面視した場合、前記リブは、少なくとも一部が前記素子配置領域に重合する位置に配置され、
前記天板部は前記ボルト挿通孔に向けて凹む凹部を有することを特徴とする電動圧縮機。 Rotation axis and
An electric motor that rotates the rotating shaft and
A compression unit that is driven by the rotation of the rotating shaft to compress the refrigerant,
A housing for accommodating the rotating shaft, the electric motor, and the compression unit,
A substrate on which a switching element that applies a switching element to the electric motor while converting a DC voltage into an AC voltage is mounted.
A cover that is attached to the outer surface of the housing, forms a storage space for accommodating the substrate together with the housing, and has a top plate portion that faces the substrate in parallel at intervals.
A mounting leg portion provided on the outer surface of the housing and the outer surface of the top plate portion and having a bolt insertion hole through which a bolt is inserted.
It has ribs extending from the outer surface of the mounting leg to the outer surface of the top plate along a second direction in which the bolt insertion hole intersects the first direction through the mounting leg.
The switching element is arranged in the element arrangement area set on the substrate, and the switching element is arranged.
When the top plate portion is viewed in a plan view, the ribs are arranged at a position where at least a part thereof overlaps with the element arrangement region .
An electric compressor characterized in that the top plate portion has a recess recessed toward the bolt insertion hole. 前記リブは、前記第１方向に沿って間隔を空けて複数並設され、前記天板部には、前記第１方向に隣り合う前記リブに挟まれた領域が形成されており、前記天板部を平面視した場合、前記リブ、及び前記リブに挟まれた領域は前記素子配置領域に対向している請求項１に記載の電動圧縮機。 A plurality of the ribs are arranged side by side at intervals along the first direction, and a region sandwiched between the ribs adjacent to the first direction is formed in the top plate portion, and the top plate is formed. The electric compressor according to claim 1, wherein the rib and the region sandwiched between the ribs face the element arrangement region when the portion is viewed in a plan view. 回転軸と、 Rotation axis and
前記回転軸を回転させる電動モータと、 An electric motor that rotates the rotating shaft and
前記回転軸が回転することにより駆動して冷媒を圧縮する圧縮部と、 A compression unit that is driven by the rotation of the rotating shaft to compress the refrigerant,
前記回転軸と前記電動モータと前記圧縮部とを収容するハウジングと、 A housing for accommodating the rotating shaft, the electric motor, and the compression unit,
直流電圧を交流電圧に変換しつつ前記電動モータに印加するスイッチング素子が実装される基板と、 A substrate on which a switching element that applies a switching element to the electric motor while converting a DC voltage into an AC voltage is mounted.
前記ハウジングの外面に取り付けられ前記ハウジングとともに前記基板を収容する収容空間を形成し、前記基板に対し間隔を空けて平行に対向する天板部を有するカバーと、 A cover that is attached to the outer surface of the housing to form a storage space for accommodating the substrate together with the housing, and has a top plate portion that faces the substrate in parallel at intervals.
前記ハウジングの外面、及び前記天板部の外面に設けられ、ボルトが挿通されるボルト挿通孔を有する取付脚部と、 A mounting leg portion provided on the outer surface of the housing and the outer surface of the top plate portion and having a bolt insertion hole through which a bolt is inserted.
前記天板部の外面に設けられるとともに前記ボルト挿通孔が前記取付脚部を貫通する第１方向に沿って延びる第１リブと、 A first rib provided on the outer surface of the top plate portion and having a bolt insertion hole extending along a first direction penetrating the mounting leg portion.
前記第１方向に交差した第２方向に沿って前記取付脚部の外面から前記天板部の外面に延びるとともに前記取付脚部と前記第１リブとを連結する第２リブと、を有し、 It has a second rib that extends from the outer surface of the mounting leg portion to the outer surface of the top plate portion along the second direction intersecting the first direction and connects the mounting leg portion and the first rib. ,
前記スイッチング素子は、前記基板に設定された素子配置領域に配置され、 The switching element is arranged in the element arrangement area set on the substrate, and the switching element is arranged.
前記天板部を平面視した場合、前記第２リブは、少なくとも一部が前記素子配置領域に重合する位置に配置され、 When the top plate portion is viewed in a plan view, the second rib is arranged at a position where at least a part thereof overlaps with the element arrangement region.
前記天板部の外面から前記第１リブの突出端までの寸法は、前記天板部の外面から前記取付脚部の突出端までの寸法よりも小さく、 The dimension from the outer surface of the top plate portion to the protruding end of the first rib is smaller than the dimension from the outer surface of the top plate portion to the protruding end of the mounting leg portion.
前記第２リブは、前記第１リブの突出端から前記取付脚部の突出端に向けて傾斜していることを特徴とする電動圧縮機。 An electric compressor characterized in that the second rib is inclined from a protruding end of the first rib toward a protruding end of the mounting leg. 前記第２リブは、前記第１方向に沿って間隔を空けて複数並設され、前記天板部には、前記第１方向に隣り合う前記第２リブに挟まれた領域が形成されており、前記天板部を平面視した場合、前記第２リブ、及び前記第２リブに挟まれた領域は前記素子配置領域に対向している請求項３に記載の電動圧縮機。 A plurality of the second ribs are arranged side by side at intervals along the first direction, and a region sandwiched between the second ribs adjacent to the first direction is formed in the top plate portion. The electric compressor according to claim 3, wherein when the top plate portion is viewed in a plan view, the second rib and the region sandwiched between the second ribs face the element arrangement region. 前記天板部は前記ボルト挿通孔に向けて凹む凹部を有する請求項３又は請求項４に記載の電動圧縮機。 The electric compressor according to claim 3 or 4, wherein the top plate portion has a recess recessed toward the bolt insertion hole.
JP2018070072A 2018-03-30 2018-03-30 Electric compressor Active JP6955220B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2018070072A JP6955220B2 (en) 2018-03-30 2018-03-30 Electric compressor
DE102019203806.9A DE102019203806A1 (en) 2018-03-30 2019-03-20 Electric compressor
CN201910241723.3A CN110319011B (en) 2018-03-30 2019-03-28 Electric compressor
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