JPS61157779A - Bearing device for compressor - Google Patents

Bearing device for compressor

Info

Publication number
JPS61157779A
JPS61157779A JP27616084A JP27616084A JPS61157779A JP S61157779 A JPS61157779 A JP S61157779A JP 27616084 A JP27616084 A JP 27616084A JP 27616084 A JP27616084 A JP 27616084A JP S61157779 A JPS61157779 A JP S61157779A
Authority
JP
Japan
Prior art keywords
bearing
metal
sintered
section
compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP27616084A
Other languages
Japanese (ja)
Inventor
Katsuhiro Akatsuchi
赤土　勝博
Yukio Tawara
田原　行雄
Shuji Matsumoto
修二 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP27616084A priority Critical patent/JPS61157779A/en
Publication of JPS61157779A publication Critical patent/JPS61157779A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0469—Other heavy metals
    • F05C2201/0475—Copper or alloys thereof

Landscapes

  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

PURPOSE:To form the fixing section and the bearing section of bearing device with different material having the optimal bearing characteristic by forming them independently while forming at least one of them with sintered metal and integrally dispersion bonding when sintering. CONSTITUTION:Main and sub bearing bodies 5, 6 jointed to the upper and lower faces of cylinder in an enclosed compressor are constructed while integrally bonding the fixing section 7 and a bearing metal 9 or a bearing section provided at the boss section 8. The fixing section 7 of respective bearing bodies 5, 6 is formed through casting or cold forging. While the bearing metal 9 is formed with sintered metal containing Cu or C as a component for expanding the outer diameter of the bearing metal 9 when sintering. Then the bearing metal 9 is sintered while the innercircumferntial face at the boss section 8 and the outercircumferential face of the bearing metal 9 are dispersion bonded.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は回転駆動されるクランクシャフトを支持する
ための圧縮機の軸受装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a bearing device for a compressor for supporting a rotationally driven crankshaft.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

一般に、ロータリ形の圧縮機は、圧縮機部と電動機部と
を備え、この電動機部によってクランクシャフトが回転
駆動されるようになっている。このクランクシャフトは
、上記圧縮機部を構成するシリンダの上面と下面とに各
々接合固定された軸受装置によって回転自在に支持され
ている。この軸受装置は、上記シリンダに接合固定され
る取付部と、上記クランクシャフトを支持するための軸
受部とを有する。Generally, a rotary compressor includes a compressor section and an electric motor section, and a crankshaft is rotationally driven by the electric motor section. This crankshaft is rotatably supported by a bearing device that is connected and fixed to an upper surface and a lower surface of a cylinder constituting the compressor section, respectively. This bearing device includes a mounting portion that is joined and fixed to the cylinder, and a bearing portion that supports the crankshaft.

従来、このような軸受装置は、鋳造によって取付部と軸
受部とを一体成形したり、取付部を鋳造によって形成し
、この取付部に形成されたボス部に軸受部としての軸受
メタルを圧入して形成するなどのことが行なわれていた
。しかしながら、前者の手段によって作−られた軸受装
置によると、取付部と軸受部とが同一材料からなるため
、これらが異なる軸受特性を要求されるにも係わらず、
同じ特性しか持たすことができない、つまり、取付部は
シリンダ内に収容されたローラが面接触するのに対し、
軸受部はクランクシャフトが線接触するから、これら両
者の軸受特性も当然具ならなければならないが、同一材
料で作られているため、異なる特性を持たせることかで
きない。また、後者の手段によって作られた軸受装置は
、軸受部に軸受メタルを用いることによって取付部と異
なる軸受特性を持たせることができる。しかしながら、
軸受メタルを支持部の２７部に圧入するには、軸受メタ
ルの外周面と２７部の内周面とを精密に機械加工しなけ
ればならないから、その加工に多大な手間が掛り、コス
ト高を招くことになる。Conventionally, such bearing devices have been made by integrally molding the mounting part and the bearing part by casting, or by forming the mounting part by casting, and press-fitting the bearing metal as the bearing part into the boss part formed on the mounting part. Such things as forming a However, in a bearing device made by the former method, the mounting part and the bearing part are made of the same material, even though they are required to have different bearing characteristics.
They can only have the same characteristics, that is, the mounting part is in surface contact with the roller housed in the cylinder, whereas
Since the bearing part is in line contact with the crankshaft, the characteristics of both bearings must naturally be the same, but since they are made of the same material, it is not possible to give them different characteristics. Further, a bearing device made by the latter method can have bearing characteristics different from those of the mounting portion by using a bearing metal for the bearing portion. however,
In order to press-fit the bearing metal into the support section 27, the outer circumferential surface of the bearing metal and the inner circumferential surface of the 27 section must be precisely machined, which requires a great deal of time and effort and increases costs. I will invite you.

〔発明の目的〕[Purpose of the invention]

この発明は、取付部と軸受部とに異なる軸受特性を持た
せることができるとともに、その製作を容易に行なうこ
とができるようにした圧縮機の軸受装置を提供すること
にある。SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing device for a compressor in which a mounting portion and a bearing portion can have different bearing characteristics and can be manufactured easily.

〔発明の概、要〕[Summary of the invention]

この発明は、取付部と軸受部とを別体に形成するととも
に、これらの少なくとも一方を焼結金属で形成し、それ
を焼結形成するときに上記両者を一体的に拡散結合する
ことにより、取付部と軸受部とに異なる軸受特性を持た
せ、しかも製造に多大な手間が掛らないようにした圧縮
機の軸受装置である。In this invention, the mounting part and the bearing part are formed separately, at least one of them is made of sintered metal, and when they are sintered, they are integrally diffusion-bonded. This is a bearing device for a compressor in which a mounting part and a bearing part have different bearing characteristics, and the manufacturing process does not require much effort.

〔発明の実施例〕[Embodiments of the invention]

以下、この発明の第１の実施例を第１図乃至第３図を参
照して説明する。第１図は密閉形圧縮機を示し、この圧
縮機は密閉ケース１を備えている。この密閉ケース１内
には圧縮機部２と電動機部３とが設けられている。上記
圧縮機部２はシリンダ４を有し、このシリンダ４の上面
には軸受装置としての主軸受体５が接合固定され、下面
には同じく軸受装置としての副軸受体６が接合固定され
ている。各軸受体５，６は後述するように別体に形成さ
れた取付部７と、この取付部７のボス部８に設けられた
軸受部としての軸受メタル９とが一体的に結合されてな
る。A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 shows a hermetic compressor, which is equipped with a hermetic case 1. As shown in FIG. A compressor section 2 and an electric motor section 3 are provided within this sealed case 1. The compressor section 2 has a cylinder 4, and a main bearing body 5 as a bearing device is bonded and fixed to the upper surface of the cylinder 4, and a sub-bearing body 6, which also serves as a bearing device, is bonded and fixed to the bottom surface of the cylinder 4. . Each of the bearing bodies 5 and 6 is formed by integrally joining a mounting part 7 formed separately and a bearing metal 9 as a bearing part provided on a boss part 8 of this mounting part 7, as described later. .

各軸受体５，６の軸受メタル９にはクランクシャフト１
０が回転自在に支持されている。このクランクシャフト
１０の上記シリンダ４内に位置する部分にはクランクシ
ャフト１０に対して偏心したクランク部１ノが設けられ
、このクランク部１１にはローラ１２が回転自在に外嵌
されている。したがって、ローニア１２はクランクシャ
フト１０が回転させられると、そのクランク部１１によ
って上下端面を上記各軸受体５゜６の取付部７の端面に
摺接させながら偏心回転するようになっている。The crankshaft 1 is attached to the bearing metal 9 of each bearing body 5, 6.
0 is rotatably supported. A crank portion 1 eccentrically relative to the crankshaft 10 is provided at a portion of the crankshaft 10 located inside the cylinder 4, and a roller 12 is rotatably fitted onto the crank portion 11. Therefore, when the crankshaft 10 is rotated, the rownier 12 is eccentrically rotated by the crank portion 11 while its upper and lower end surfaces are brought into sliding contact with the end surfaces of the mounting portions 7 of the respective bearing bodies 5.6.

上記電動機部３は通孔１３を有する固定子１４と、この
固定子１４の通孔１３内に回転自在に収容された回転子
１５とからなる。この回転子１５には取付孔１６が形成
され、この取付孔１６に上記クランクシャフト１０の主
軸受体５から突出した上端部が嵌入されている。したが
って、電動機部３に通電して回転子１５を回転させれば
、これに上記クランクシャフト１１が連動するようにな
っている。The electric motor section 3 includes a stator 14 having a through hole 13, and a rotor 15 rotatably housed within the through hole 13 of the stator 14. A mounting hole 16 is formed in the rotor 15, and the upper end portion of the crankshaft 10 protruding from the main bearing body 5 is fitted into the mounting hole 16. Therefore, when the electric motor section 3 is energized to rotate the rotor 15, the crankshaft 11 is interlocked with the rotor 15.

上記各軸受体５，６は以下のごとく形成されている。つ
まり、各軸受体５，６の取付部７は鋳造あるいは冷間鍛
造によりて形成されている。Each of the bearing bodies 5 and 6 is formed as follows. In other words, the mounting portion 7 of each bearing body 5, 6 is formed by casting or cold forging.

また、軸受体としての軸受メタル９は焼結金属によって
形成されているとともに、この焼結金属には焼結時に上
記軸受メタル９の外径寸法を膨張させる成分としてたと
えばＣｕあるいはＣの少なくとも一方の成分が所定量含
まれている。The bearing metal 9 as a bearing body is formed of a sintered metal, and the sintered metal contains at least one of Cu or C as a component that expands the outer diameter of the bearing metal 9 during sintering. Contains a certain amount of ingredients.

−例として上記焼結金属は、ｃｕが１〜５ｖｔ％、Ｃが
０．１〜１　ｗｔ　％で、残りがＦｅからなるものが用
いられる。また、他の例としてはＣｒが３〜７ｗｔ％、
Ｃｕ　、　Ｎｉ　、　　Ｍｏのそれぞれが０．１〜２ｗ
ｔ％、Ｃが０．５〜２ｖｒｔ％で、残りがＦｅからなる
焼結金属が用いられる。- As an example, the sintered metal used includes 1 to 5 vt% Cu, 0.1 to 1 wt% C, and the remainder Fe. In addition, as another example, Cr is 3 to 7 wt%,
Each of Cu, Ni, and Mo is 0.1 to 2w
t%, C is 0.5 to 2vrt%, and the balance is Fe.

そして、上記成分の粉末状の焼結金属をブレス加工して
軸受メタル９を形成したならば、この軸受メタル９を取
付部７のボス部８内に嵌入する。ついで、図示せぬ焼結
炉で上記軸受メタル９を焼結するとともに、上記ゲス部
８の内周面と軸受メタル９′の外周面とを拡散結合、つ
まりこれら両者を金属組織的に結合させる。After the bearing metal 9 is formed by pressing the powdered sintered metal of the above components, the bearing metal 9 is fitted into the boss portion 8 of the mounting portion 7. Next, the bearing metal 9 is sintered in a sintering furnace (not shown), and the inner circumferential surface of the grooved portion 8 and the outer circumferential surface of the bearing metal 9' are diffusion bonded, that is, they are bonded metallographically. .

このような構造の主軸受体５あるいは副軸受体６によれ
ば、取付部７と軸受部としての軸受メタル９とが別体で
あるから、これらを所望する軸受特性を持つ金属で作る
ことができる。つまり、ローラ１２と面接触する取付部
７と、クランクシャフト１０と線接触する軸受メタル９
との軸受特性をそれぞれ最適な状態に設定することがで
きる。また、軸受メタル９はこれを焼結するときに取付
部７に一体的に結合されるから、上記軸受メタル９と取
付部７のボス部８とを精密に機械加工する必要がない。According to the main bearing body 5 or the sub-bearing body 6 having such a structure, the mounting part 7 and the bearing metal 9 as a bearing part are separate bodies, so they can be made of metal having desired bearing characteristics. can. In other words, the mounting portion 7 is in surface contact with the roller 12, and the bearing metal 9 is in line contact with the crankshaft 10.
It is possible to set the bearing characteristics to the optimum condition. Further, since the bearing metal 9 is integrally joined to the mounting portion 7 when sintered, there is no need to precisely machine the bearing metal 9 and the boss portion 8 of the mounting portion 7.

さらに、軸受メタル９に焼結時に膨張する成分を混入さ
せたから、上記軸受メタル９が焼結されることによって
この外周面とゴス部８の内周面とが強く圧接し、これら
の結合強度が増大する。Furthermore, since a component that expands during sintering is mixed into the bearing metal 9, when the bearing metal 9 is sintered, the outer circumferential surface and the inner circumferential surface of the goss part 8 are strongly pressed against each other, and the bonding strength between them is increased. increase

第４図はこの発明の第２の実施例で、この実施例は取付
部７のボス部８に設けられる軸受メタル９を２つに分割
するようにしたものである。FIG. 4 shows a second embodiment of the present invention, in which a bearing metal 9 provided on a boss portion 8 of a mounting portion 7 is divided into two.

第５図はこの発明の第３の実施例で、この実施例は取付
部７を焼結金属で形成するようにした。この場合、その
焼結金属には焼結時に収縮する成分としてＰ、Ｂあるい
はＳの少なくとも１つの成分を混入させる。たとえば、
Ｐ、ＢあるいはＳの少なくとも１つを０．１〜１　ｗｔ
　％の割合で混入すれば、収縮率を０．５〜２．０チに
することができる。したがって、このような成分の焼結
金属を用いれば、焼結時にゲス部８の内径寸法が縮少す
るから、このゴス部８と軸受メタル９との結合強度が向
上する。FIG. 5 shows a third embodiment of the present invention, in which the mounting portion 7 is made of sintered metal. In this case, at least one component of P, B, or S is mixed into the sintered metal as a component that shrinks during sintering. for example,
0.1 to 1 wt of at least one of P, B or S
%, the shrinkage rate can be set to 0.5 to 2.0 inches. Therefore, if a sintered metal having such a composition is used, the inner diameter of the grooved part 8 is reduced during sintering, so that the bonding strength between the grooved part 8 and the bearing metal 9 is improved.

なお、上記第１乃至第３の実施例において、取付部７と
軸受メタル９との両者を焼結金属で形成するようにして
もよい。Note that in the first to third embodiments described above, both the mounting portion 7 and the bearing metal 9 may be formed of sintered metal.

第６図はこの発明の第４の実施例を示し、この実施例は
取付部７を７ラング部２１だげの構造として、この７ラ
ング部２１の取付孔２２）Ｉｃ？ス部８を兼ねる軸受部
としての軸受メタル９の一端部を嵌合させ、これら−を
一体的に結合させるようにした。図面では軸受メタル９
を焼結金属で形成した例を示すが、取付部７あるいは　
　。FIG. 6 shows a fourth embodiment of the present invention, in which the mounting portion 7 has a structure with only seven rungs 21, and the mounting holes 22)Ic? of the seven rungs 21. One end portion of a bearing metal 9 serving as a bearing portion that also serves as a bearing portion 8 is fitted to integrally connect these parts. In the drawing, bearing metal 9
is formed of sintered metal, but the attachment part 7 or
.

取付部７と軸受メタル９の両者を焼結金属で形成しても
よい。Both the mounting portion 7 and the bearing metal 9 may be formed of sintered metal.

なお、この発明はロータリ形の圧縮機だけでなく、レシ
プロ形の圧縮機にも適用可能であること無論である。It goes without saying that the present invention is applicable not only to rotary type compressors but also to reciprocating type compressors.

〔発明の効果〕〔Effect of the invention〕

以上述べたようにこの発明は、軸受装置の取付部と軸受
部とを別体に形成するとともに、とれらの少なくとも一
方を焼結金属で形成し、それな焼結形成するときに上記
両者を一体的に拡散結合するようにした。したがって、
取付部と軸受部とをそれぞれ最適な軸受特性を持つ異な
る材料で形成することができる。また、取付部と軸受部
との少なくとも一方を焼結形成するときにこれら両者を
一体的に結合させるようにしたため、これら両者及精密
に機械加工する必要がないから、製作の容易化が計れる
などの利点を有する。As described above, the present invention forms the mounting part and the bearing part of a bearing device separately, forms at least one of them from sintered metal, and when sintering both of them, the mounting part and the bearing part are formed separately. It was made to be integrally diffusion-coupled. therefore,
The mounting part and the bearing part can each be made of different materials with optimal bearing properties. In addition, since at least one of the mounting part and the bearing part is sintered and formed, the two are integrally joined, so there is no need for precise machining of the two parts, making manufacturing easier. It has the following advantages.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの発明の第１の実施例を示す圧縮機の縦断面
図、第２図は同じく軸受装置の断面図、第３図は同じ（
軸受装置の取付部と軸受部とを結合する前の状態の断面
図、第４図はこの発明の第２の実施例を示す軸受装置の
断面図、第５図はこの発明の第３の実施例を示す軸受装
置の断面図、第６図はこの発明の第４の実施例を示す軸
受装置の断面図である。 ４・・・シリンダ、５，６・・・軸受体（軸受装置）７
・・・取付部、９・・・軸受メタル（軸受部）。 出願人代理人　　弁理士　鈴　江　武　彦第２図 第４図 第６図 ？、！：　　　　　　　、？１ 第３図 第５図FIG. 1 is a longitudinal sectional view of a compressor showing a first embodiment of the present invention, FIG. 2 is a sectional view of the bearing device, and FIG. 3 is the same (
FIG. 4 is a sectional view of the bearing device showing a second embodiment of the invention, and FIG. 5 is a sectional view of the bearing device in a state before the mounting portion and the bearing portion are coupled together. FIG. 5 is a sectional view of the bearing device according to the second embodiment of the invention. FIG. 6 is a sectional view of a bearing device showing a fourth embodiment of the present invention. 4... Cylinder, 5, 6... Bearing body (bearing device) 7
... Mounting part, 9... Bearing metal (bearing part). Applicant's representative Patent attorney Takehiko Suzue Figure 2 Figure 4 Figure 6? ,! : ,? 1 Figure 3 Figure 5

Claims (6)

【特許請求の範囲】[Claims] （１）取付部と、クランクシャフトを回転自在に支持す
る軸受部とを備えた圧縮機の軸受装置において、上記取
付部と軸受部とを別体に形成するとともに、これらの少
なくとも一方を焼結金属で形成し、それを焼結形成する
ときに上記取付部と軸受部との両者を一体的に拡散結合
させてなる圧縮機の軸受装置。(1) In a bearing device for a compressor that includes a mounting portion and a bearing portion that rotatably supports a crankshaft, the mounting portion and the bearing portion are formed separately, and at least one of them is sintered. A bearing device for a compressor is made of metal, and the mounting portion and the bearing portion are integrally diffusion-bonded when the metal is sintered. （２）上記軸受部をＣｕ（銅）あるいはＣ（炭素）の少
なくとも１つの成分を含むを焼結金属で形成したことを
特徴とする特許請求の範囲第１項記載の圧縮機の軸受装
置。(2) The bearing device for a compressor according to claim 1, wherein the bearing portion is formed of a sintered metal containing at least one component of Cu (copper) or C (carbon). （３）上記軸受部をＣｕが１〜５ｗｔ％、Ｃが０．１〜
１ｗｔ％で残りがＦｅ（鉄）からなる焼結金属で形成し
たことを特徴とする特許請求の範囲第２項記載の圧縮機
の軸受装置。(3) The above bearing part contains 1 to 5 wt% of Cu and 0.1 to 0.1 wt% of C.
3. The bearing device for a compressor according to claim 2, wherein the bearing device is made of a sintered metal of 1 wt% and the remainder being Fe (iron). （４）上記軸受部をＣｒ（クロム）が３〜７ｗｔ％、Ｃ
ｕ、Ｎｉ（ニッケル）、Ｍｏ（モリブデン）のそれぞれ
が０．１〜２ｗｔ％、Ｃが０．５〜２ｗｔ％の焼結金属
で形成したことを特徴とする特許請求の範囲第２項記載
の圧縮機の軸受装置。(4) The above bearing part contains 3 to 7 wt% of Cr (chromium), and C
Claim 2, characterized in that it is formed of a sintered metal containing 0.1 to 2 wt% of u, Ni (nickel), and Mo (molybdenum), and 0.5 to 2 wt% of C. Compressor bearing device. （５）上記取付部をＰ（リン）、Ｂ（ホウ素）あるいは
Ｓ（イオウ）のすくなくとも１つの成分を含む焼結金属
で形成したことを特徴とする特許請求の範囲第１項記載
の圧縮機の軸受装置。(5) The compressor according to claim 1, wherein the mounting portion is formed of a sintered metal containing at least one component of P (phosphorus), B (boron), or S (sulfur). bearing device. （６）上記取付部をＰ、ＢあるいはＳの少なくとも１つ
の成分を０．１〜１ｗｔ％で含む焼結金属で形成したこ
とを特徴とする特許請求の範囲第５項記載の圧縮機の軸
受装置。(6) A bearing for a compressor according to claim 5, wherein the mounting portion is formed of a sintered metal containing at least one component of P, B, or S in an amount of 0.1 to 1 wt%. Device.
JP27616084A 1984-12-28 1984-12-28 Bearing device for compressor Pending JPS61157779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27616084A JPS61157779A (en) 1984-12-28 1984-12-28 Bearing device for compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27616084A JPS61157779A (en) 1984-12-28 1984-12-28 Bearing device for compressor

Publications (1)

Publication Number Publication Date
JPS61157779A true JPS61157779A (en) 1986-07-17

Family

ID=17565573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27616084A Pending JPS61157779A (en) 1984-12-28 1984-12-28 Bearing device for compressor

Country Status (1)

Country Link
JP (1) JPS61157779A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01173395U (en) * 1988-05-17 1989-12-08
JP2009281357A (en) * 2008-05-26 2009-12-03 Daikin Ind Ltd Compressor
CN105370538A (en) * 2015-11-09 2016-03-02 珠海凌达压缩机有限公司 Flange assembly, compressor, heat exchange equipment and compressor machining method
JP2022043621A (en) * 2020-09-04 2022-03-16 日立グローバルライフソリューションズ株式会社 Hermetic compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01173395U (en) * 1988-05-17 1989-12-08
JP2009281357A (en) * 2008-05-26 2009-12-03 Daikin Ind Ltd Compressor
CN105370538A (en) * 2015-11-09 2016-03-02 珠海凌达压缩机有限公司 Flange assembly, compressor, heat exchange equipment and compressor machining method
JP2022043621A (en) * 2020-09-04 2022-03-16 日立グローバルライフソリューションズ株式会社 Hermetic compressor

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