JP5173948B2 - Accumulator-integrated compressor - Google Patents

Accumulator-integrated compressor Download PDF

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JP5173948B2
JP5173948B2 JP2009149268A JP2009149268A JP5173948B2 JP 5173948 B2 JP5173948 B2 JP 5173948B2 JP 2009149268 A JP2009149268 A JP 2009149268A JP 2009149268 A JP2009149268 A JP 2009149268A JP 5173948 B2 JP5173948 B2 JP 5173948B2
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cylindrical shell
accumulator
compression mechanism
stator
shell
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JP2011007077A (en
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忍 國分
康之 赤堀
俊明 岩崎
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

この発明は、冷凍サイクルを利用する例えば冷蔵、冷凍、空調、温水機器などに好ましく用いられるアキュムレータ一体型圧縮機に関するものである。   The present invention relates to an accumulator-integrated compressor that is preferably used in, for example, refrigeration, refrigeration, air conditioning, and hot water equipment using a refrigeration cycle.

従来のアキュムレータ一体型圧縮機として、密閉容器であるシェルの外周面に上ケーシング、胴ケーシング、下ケーシングからなるケーシングを固定することによりアキュムレータ空間を形成し、アキュムレータの剛性を増大させ、振動を軽減させるようにしたものがある（例えば特許文献１参照）。また、開口端にフランジ部を有する第１の有底円筒ケース（潤滑油を貯蔵する）とその円筒ケースのフランジ部の外縁に取り付けられる蓋体で密閉容器を構成すると共に、有底円筒ケースの外周に第２の有底円筒ケースを固定し、アキュムレータ空間を形成するようにしたものがある（例えば特許文献２参照）。   As a conventional accumulator-integrated compressor, an accumulator space is formed by fixing a casing consisting of an upper casing, a trunk casing, and a lower casing on the outer peripheral surface of a shell, which is a sealed container, thereby increasing the rigidity of the accumulator and reducing vibration. (For example, refer to Patent Document 1). In addition, a sealed container is constituted by a first bottomed cylindrical case (stores lubricating oil) having a flange portion at the open end and a lid attached to the outer edge of the flange portion of the cylindrical case, There is one in which a second bottomed cylindrical case is fixed to the outer periphery to form an accumulator space (see, for example, Patent Document 2).

特開２００８−２４８７１７号公報（第１頁、図１）JP 2008-248717 A (first page, FIG. 1) 実公平４−４４８６９号公報（第２頁、第２図）Japanese Utility Model Publication No. 4-44869 (page 2, Fig. 2)

上記のような従来のアキュムレータ一体型圧縮機においては、アキュムレータ空間内に吸入管を設置していると共に、圧縮機構部のシェルとの固定部（溶接で固定される場合がある）を内在するため、下記のような課題を有する。
（１）圧縮機構部及びステータを内在するシェルの外周にケーシングを固定するため、少なくとも３つのケーシング部品からケーシングを構成しており、部品費用が大となる。また、特許文献２のような構造では特許文献１のような構造に比べて部品点数が削減されるが、第２の有底円筒ケーシングを製作する際、設備費が高価な静水圧プレス法を用いるか、材料の延性、降伏強度等、必要な機械的強度を合わせ持つ特殊材料を素材として絞りプレス加工するか何れかの方法で加工する必要があり、何れにしても部品が高価となる。 In the conventional accumulator-integrated compressor as described above, the suction pipe is installed in the accumulator space, and a fixing portion (which may be fixed by welding) with the shell of the compression mechanism portion is included. Have the following problems.
(1) Since the casing is fixed to the outer periphery of the shell including the compression mechanism portion and the stator, the casing is composed of at least three casing parts, which increases the cost of the parts. Further, in the structure as in Patent Document 2, the number of parts is reduced as compared with the structure as in Patent Document 1, but when the second bottomed cylindrical casing is manufactured, the hydrostatic press method is used because the equipment cost is expensive. It is necessary to use a special material having necessary mechanical strength such as ductility and yield strength of the material, or to perform drawing press processing as a raw material, and in any case, the parts are expensive.

（２）通常、容器の密閉性を確認するため、製品を完成状態で水没させ、吐出管あるいは吸入管より内部に気体を封入し、気泡の発生の有無を確認することにより密閉性を判定するが（水没試験と呼ぶ）、この方法で密閉性を確認する場合、圧縮機構部とシェルに取り付けられた吸入管の接合部及び圧縮機構部とシェルの固定部がアキュムレータ空間内部に存在するため、製品の完成状態で気泡の発生位置を特定することが困難であり、品質管理上の問題を生じる。なお、アキュムレータ空間内部に圧縮機構部とシェルに取り付けられた吸入管の接合部及び圧縮機構部とシェルの固定部の気密状態を確認するため、アキュムレータを固定する前に水没試験をする方法があるが、アキュムレータの固定部分も気密性を要求されるため、アキュムレータ固定前と固定後の２回の試験をする必要があり、試験コストが増大する。   (2) Usually, in order to check the sealing property of the container, the product is submerged in a completed state, gas is sealed inside from the discharge pipe or suction pipe, and the sealing property is determined by checking whether or not bubbles are generated. (Referred to as a submergence test), when confirming the sealing property by this method, because the joint portion of the suction pipe attached to the compression mechanism portion and the shell and the fixing portion of the compression mechanism portion and the shell are present in the accumulator space, It is difficult to specify the position where bubbles are generated in the finished product, resulting in quality control problems. In addition, there is a method of performing a submergence test before fixing the accumulator in order to confirm the airtight state of the compression pipe portion attached to the compression mechanism portion and the shell and the compression mechanism portion and the fixing portion of the shell inside the accumulator space. However, since the fixed part of the accumulator is also required to be airtight, it is necessary to perform two tests before and after fixing the accumulator, which increases the test cost.

この発明は、上記のような従来技術の課題を解消するためになされたもので、部品数を少なくでき、製造が容易で試験も簡単なアキュムレータ一体型圧縮機を得ることを目的としている。   The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to obtain an accumulator-integrated compressor that can reduce the number of parts, is easy to manufacture, and is easy to test.

この発明に係るアキュムレータ一体型圧縮機は、直径が一様に形成された、または、軸方向の一端部側及び／もしくは他端部側が段部に連なる大径部に形成された第１の円筒状シェルと、この第１の円筒状シェルの内部に軸方向に並設されたステータ及び圧縮機構部と、上記第１の円筒状シェルの周りに所定間隙を介して配設され、軸方向一端部が上記ステータの反圧縮機構部側端部近傍に対応する上記第１の円筒状シェルの外周部に固定され、軸方向他端部が上記ステータと上記圧縮機構部との間の部分に対応する上記第１の円筒状シェルの外周部に固定され、上記第１の円筒状シェルの外周面との間にアキュムレータ空間を形成する第２の円筒状シェルと、を備えるようにしたものである。   The accumulator-integrated compressor according to the present invention is a first cylinder having a uniform diameter, or one end and / or the other end in the axial direction formed in a large-diameter portion that is continuous with a stepped portion. A cylindrical shell, a stator and a compression mechanism portion arranged in parallel in the axial direction inside the first cylindrical shell, and a predetermined gap around the first cylindrical shell. Is fixed to the outer peripheral portion of the first cylindrical shell corresponding to the vicinity of the end portion of the stator on the side opposite to the compression mechanism portion, and the other axial end portion corresponds to a portion between the stator and the compression mechanism portion. And a second cylindrical shell that is fixed to the outer peripheral portion of the first cylindrical shell and forms an accumulator space with the outer peripheral surface of the first cylindrical shell. .

この発明においては、第１の円筒状シェルと第２の円筒状シェルからなる２つの部品に挟まれた空間によってアキュムレータを形成するようにしたので、部品数が削減され、製造も容易であり、従って安価にできる。また、第１の円筒状シェルと第２の円筒状シェルの接合部、アキュムレータ空間に対する冷媒ガスの吸入管や、アキュムレータ空間から圧縮機構部に冷媒ガスを送給する送出管の接合部、及び圧縮機構部と第１の円筒状シェルの固定部等を何れも外から見える部分に配設することが可能となるので、気密状態を製品の完成状態で容易に確認することができる。   In this invention, since the accumulator is formed by the space sandwiched between the two parts consisting of the first cylindrical shell and the second cylindrical shell, the number of parts is reduced and the manufacture is easy. Therefore, it can be made inexpensive. In addition, a joint portion between the first cylindrical shell and the second cylindrical shell, a refrigerant gas suction pipe to the accumulator space, a joint portion of a delivery pipe that feeds the refrigerant gas from the accumulator space to the compression mechanism portion, and a compression Since both the mechanism portion and the first cylindrical shell fixing portion and the like can be disposed in a portion visible from the outside, the airtight state can be easily confirmed in the completed state of the product.

この発明の実施の形態１によるアキュムレータ一体型圧縮機を概念的に示す図であり、（ａ）は平面図、（ｂ）は縦断面図。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows notionally the accumulator integrated compressor by Embodiment 1 of this invention, (a) is a top view, (b) is a longitudinal cross-sectional view. 図１に示された第１の円筒状シェルを示す図であり、（ａ）は平面図、（ｂ）は縦断面図。It is a figure which shows the 1st cylindrical shell shown by FIG. 1, (a) is a top view, (b) is a longitudinal cross-sectional view. 図１に示されたアキュムレータの外殻部分である第２の円筒状シェルを示す図であり、（ａ）は平面図、（ｂ）は縦断面図。It is a figure which shows the 2nd cylindrical shell which is the outer shell part of the accumulator shown by FIG. 1, (a) is a top view, (b) is a longitudinal cross-sectional view. 図１に示された第２の円筒状シェルに設けられた送出管の接続部近傍を拡大して示す断面図。Sectional drawing which expands and shows the connection part vicinity of the delivery pipe | tube provided in the 2nd cylindrical shell shown by FIG. 図１に示された第１の円筒状シェルを加工する際に用いる拡管機の要部を概念的に示す図であり、（ａ）は側面断面図、（ｂ）は図５（ａ）のＶｂ−Ｖｂ線における矢視断面図。It is a figure which shows notionally the principal part of the pipe expander used when processing the 1st cylindrical shell shown by FIG. 1, (a) is side sectional drawing, (b) is a figure of Fig.5 (a). The arrow directional cross-sectional view in the Vb-Vb line. 図５に示された拡管機による加工工程を説明する図であり、（ａ）は一端部を拡管した状態を示す側面断面図、（ｂ）は他端部を拡管した状態を示す側面断面図。It is a figure explaining the processing process by the pipe expander shown by FIG. 5, (a) is side sectional drawing which shows the state which expanded the one end part, (b) is side sectional drawing which shows the state which expanded the other end part . この発明の実施の形態２によるアキュムレータ一体型圧縮機の要部を概念的に示す縦断面図。The longitudinal cross-sectional view which shows notionally the principal part of the accumulator integrated compressor by Embodiment 2 of this invention. この発明の実施の形態３によるアキュムレータ一体型圧縮機の要部を概念的に示す縦断面図。The longitudinal cross-sectional view which shows notionally the principal part of the accumulator integrated compressor by Embodiment 3 of this invention.

実施の形態１．
以下、この発明の実施の形態１によるアキュムレータ一体型圧縮機について図１〜図６を参照して説明する。図において、アキュムレータ一体型圧縮機は、中央部が括れた形状で軸方向に２つの段部Ａ１、Ａ２を有する第１の円筒状シェル（段付中間シェル）１、この第１の円筒状シェル１の内部の括れた小径部分に焼嵌によって固定されたステータ２、第１の円筒状シェル１の図の下側の大径部１ｂの内側に溶接で固定された圧縮機構部３を備えている。第１の円筒状シェル１の下側の大径部１ｂの外周上には、圧縮機構部３を溶接固定したときに形成された溶接ナゲット４が複数箇所存在する。第１の円筒状シェル１の上方の大径部１ａの端部には上部シェル５が溶接により固定され、下方の大径部１ｂの端部には下部シェル６が溶接固定され、上記第１の円筒状シェル１、上部シェル５、及び下部シェル６によって密閉容器を形成している。 Embodiment 1 FIG.
Hereinafter, an accumulator-integrated compressor according to Embodiment 1 of the present invention will be described with reference to FIGS. In the figure, an accumulator-integrated compressor includes a first cylindrical shell (stepped intermediate shell) 1 having two step portions A1 and A2 in the axial direction in a constricted central portion, and the first cylindrical shell. 1 includes a stator 2 fixed by shrink fitting to a constricted small-diameter portion inside 1, and a compression mechanism unit 3 fixed by welding inside a large-diameter portion 1b on the lower side of the first cylindrical shell 1 in the figure. Yes. On the outer periphery of the large-diameter portion 1 b on the lower side of the first cylindrical shell 1, there are a plurality of weld nuggets 4 formed when the compression mechanism portion 3 is fixed by welding. An upper shell 5 is fixed to the end of the upper large-diameter portion 1a of the first cylindrical shell 1 by welding, and a lower shell 6 is fixed to the end of the lower large-diameter portion 1b by welding. The cylindrical shell 1, the upper shell 5, and the lower shell 6 form a sealed container.

なお、上部シェル５及び下部シェル６の第１の円筒状シェル１に対する溶接部は図示されていない。また、各シェルの肉厚は誇張して図示されている。上部シェル５の上端部には圧縮機構部３で圧縮されたガスを密閉容器外に吐出するための吐出管７、外部の駆動電源を接続し、ステータ２に電力を通電させるためのガラス端子８が固定されている。なお、ステータ２とガラス端子８を接続する配線は図示されていない。第１の円筒状シェル１の外周部には、軸方向に離間された上方の段部Ａ１と下方の段部Ａ２の大径部１ａ、１ｂ相互に跨るように第２の円筒状シェル（アキュムレータシェル）９が嵌合され、第１の円筒状シェル１の各大径部１ａ、１ｂにおいてそれぞれ溶接固定され、第１の円筒状シェル１の外周面との間に環状のアキュムレータ空間１０を形成している。なお、第２の円筒状シェル９の上下両端には、溶接の際形成された円周溶接部１１が形成されている。   In addition, the welding part with respect to the 1st cylindrical shell 1 of the upper shell 5 and the lower shell 6 is not illustrated. The thickness of each shell is exaggerated. Connected to the upper end of the upper shell 5 are a discharge pipe 7 for discharging the gas compressed by the compression mechanism 3 to the outside of the hermetic container, an external drive power supply, and a glass terminal 8 for energizing the stator 2 with power. Is fixed. In addition, the wiring which connects the stator 2 and the glass terminal 8 is not illustrated. An outer peripheral portion of the first cylindrical shell 1 has a second cylindrical shell (accumulator) straddling the large-diameter portions 1a and 1b of the upper step A1 and the lower step A2 that are spaced apart in the axial direction. Shell) 9 is fitted and welded and fixed at each of the large-diameter portions 1a and 1b of the first cylindrical shell 1 to form an annular accumulator space 10 between the outer peripheral surface of the first cylindrical shell 1 doing. Note that circumferential welds 11 formed at the time of welding are formed on the upper and lower ends of the second cylindrical shell 9.

第２の円筒状シェル９の外周部には、該第２の円筒状シェル９の外部から潤滑油が混合している冷媒ガスを吸入するための吸入管１２、及びアキュムレータ空間１０で潤滑油と分離した冷媒ガスを圧縮機構部３に送出するための送出管１３が溶接固定されている。送出管１３は、管継手１４を介して、連通管１５にろう付けで固定され、連通管１５は圧縮機構部３の吸入口１６に接続されている。上記送出管１３は図４に示すように略Ｌ字状で曲げ部が滑らかな曲線の流路形状をしており、アキュムレータ空間１０で分離したガスと潤滑油の内、比較的軽いガスをアキュムレータ空間１０の上部空間より吸入する機能を有する。また、送出管１３の中央部には***１７が開けられており、この***１７よりアキュムレータ空間１０で分離され、下部に溜まった潤滑油（図４では図示省略）の内、吐出管７から流出する潤滑油に見合う適量の油が圧縮機構部３内に導かれ、潤滑油は冷媒ガスと共に循環される。   The outer peripheral portion of the second cylindrical shell 9 has a suction pipe 12 for sucking refrigerant gas mixed with the lubricating oil from the outside of the second cylindrical shell 9, and the lubricating oil in the accumulator space 10. A delivery pipe 13 for delivering the separated refrigerant gas to the compression mechanism unit 3 is fixed by welding. The delivery pipe 13 is fixed to the communication pipe 15 by brazing via the pipe joint 14, and the communication pipe 15 is connected to the suction port 16 of the compression mechanism unit 3. As shown in FIG. 4, the delivery pipe 13 has a substantially L-shaped flow path shape with a smooth bent portion, and a relatively light gas out of the gas and lubricating oil separated in the accumulator space 10 is accumulated in the accumulator. It has a function of inhaling from the upper space of the space 10. In addition, a small hole 17 is formed in the central portion of the delivery pipe 13. The lubricating oil separated from the accumulator space 10 from the small hole 17 and accumulated in the lower part (not shown in FIG. 4) flows out from the discharge pipe 7. An appropriate amount of oil commensurate with the lubricating oil to be conducted is introduced into the compression mechanism section 3 and the lubricating oil is circulated together with the refrigerant gas.

次に、上記第１の円筒状シェル１の製造方法の一例として拡管機を用いた塑性加工による製造について図５、図６を参照して説明する。拡管機は、円錐形状をした拡管芯金２０と、内径側に拡管芯金２０の外周面に当接するテーパ斜面を持つ分割円筒形状の拡管外金２１と、芯金ロッド２２を介して拡管芯金２０を図の右方向に引き寄せる芯金引き機構２３からなっている。なお、拡管外金２１には段部Ａ１、Ａ２を形成するための凸部２１ａが図の右端部に形成されている。第１の円筒状シェル１を得るには、先ず、第１の円筒状シェル１に加工する円筒部材１００を図５（ａ）に示すように拡管機にセットする。   Next, as an example of the manufacturing method of the first cylindrical shell 1, manufacturing by plastic working using a pipe expander will be described with reference to FIGS. The pipe expander includes a pipe-shaped core metal 20 having a conical shape, a split cylindrical-shaped pipe-shaped outer metal 21 having a tapered inclined surface in contact with the outer peripheral surface of the pipe core 20 on the inner diameter side, and a tube-expanded core via a core metal rod 22. It consists of a core pulling mechanism 23 that pulls the gold 20 in the right direction in the figure. Note that a convex portion 21a for forming the step portions A1 and A2 is formed at the right end portion of the drawing on the outer tube 21. In order to obtain the first cylindrical shell 1, first, the cylindrical member 100 to be processed into the first cylindrical shell 1 is set in a pipe expander as shown in FIG.

次に、芯金引き機構２３によって、芯金ロッド２２を図６（ａ）の矢印Ｂに示す方向に引き寄せると、芯金ロッド２２に連結された円錐形状の拡管芯金２０が拡管外金２１のテーパ部分に接触し、くさび効果により拡管外金２１の形状に沿って、円筒部材１００の図の右端部が径方向に拡張され、一方の段部Ａ１と段部Ａ１に連なる大径部１ａが形成される。次に、その円筒部材１００の左右を反転させて、再び拡管機にセットして、同様に拡管を行うことにより、図６（ｂ）に示すように、他端部側にも段部Ａ２と段部Ａ２に連なる大径部１ｂが形成された所望の第１の円筒状シェル１を得ることができる。なお、図６に例示した拡管芯金２０は分割個数が８個であるが、これに限定されるものではない。また、段部Ａ１、Ａ２の形状は図の左右で異なるようにしても差し支えない。   Next, when the cored bar 22 is pulled in the direction indicated by the arrow B in FIG. 6A by the cored bar drawing mechanism 23, the conical expanded cored bar 20 connected to the cored bar 22 is expanded into the expanded outer bar 21. The right end portion of the cylindrical member 100 in the drawing is radially expanded along the shape of the tube-expanded outer metal 21 due to the wedge effect, and one step portion A1 and the large-diameter portion 1a connected to the step portion A1. Is formed. Next, the left and right sides of the cylindrical member 100 are reversed, set again in the pipe expander, and expanded in the same manner, and as shown in FIG. The desired first cylindrical shell 1 in which the large-diameter portion 1b connected to the step portion A2 is formed can be obtained. In addition, although the tube expansion metal bar 20 illustrated in FIG. 6 has a division number of 8, it is not limited to this. Further, the shape of the stepped portions A1 and A2 may be different on the left and right in the drawing.

上記段部Ａ１は、ステータ２の反圧縮機構部側端部近傍に位置するように形成され、段部Ａ２はステータ２と圧縮機構部３の間部に位置するように形成される。そして、図１（ｂ）に示すように圧縮機構部３の溶接固定位置、及びアキュムレータ空間１０から圧縮機構部３に冷媒ガスを導入するための吸入口１６は、第２の円筒状シェル９と第１の円筒状シェル１との下側の溶接個所（円周溶接部１１）よりも図の下方部の大径部１ｂに配設されている。なお、圧縮機構部３としては、ステータ２に通電することで回転するロータ１８が挿設されている偏心部を持つクランクシャフト、シリンダ、ベーン、バネ、ロータにより構成される例えば一般的なロータリ圧縮機（何れも詳細図示省略）などが好ましく用いられるが、これに限定されるものではない。また、下部シェル６の底部には、圧縮機構部３の潤滑のための潤滑油１９が貯留されている。   The step A1 is formed so as to be positioned in the vicinity of the end of the stator 2 on the side opposite to the compression mechanism, and the step A2 is formed so as to be positioned between the stator 2 and the compression mechanism 3. As shown in FIG. 1 (b), the welding fixing position of the compression mechanism portion 3 and the suction port 16 for introducing the refrigerant gas from the accumulator space 10 to the compression mechanism portion 3 are connected to the second cylindrical shell 9. The first cylindrical shell 1 is disposed in the large-diameter portion 1b in the lower portion of the figure than the lower welding portion (circumferential weld portion 11). The compression mechanism 3 includes, for example, a general rotary compression composed of a crankshaft, a cylinder, a vane, a spring, and a rotor having an eccentric portion into which a rotor 18 that rotates by energizing the stator 2 is inserted. A machine (all of which are not shown in detail) is preferably used, but is not limited thereto. A lubricating oil 19 for lubricating the compression mechanism 3 is stored at the bottom of the lower shell 6.

次に、動作について説明する。上記のように構成された実施の形態１のアキュムレータ一体型圧縮機は、冷凍サイクルを利用する例えば空調装置、冷蔵装置、冷凍装置、温水装置などの冷媒回路（図示省略）に挿入され、ヒートポンプの駆動源として用いられる。なお、圧縮機構部の動作、冷凍サイクルの動作などは、よく知られた従来の技術によるものと同様であるので、説明を省略する。アキュムレータ空間１０に流入した油を含む冷媒ガスは、送出管１３に至る間に冷媒ガスと油に分離し、分離した軽いガスはアキュムレータ空間１０の上部空間から送出管１３、連通管１５を経て圧縮機構部３に送給される。また、アキュムレータ空間１０の底部に溜まった潤滑油１９は送出管１３に設けられた***１７から圧縮機構部３内に一定の流量で流出する。   Next, the operation will be described. The accumulator-integrated compressor according to Embodiment 1 configured as described above is inserted into a refrigerant circuit (not shown) such as an air conditioner, a refrigerator, a refrigeration apparatus, or a hot water apparatus that uses a refrigeration cycle. Used as a drive source. Note that the operation of the compression mechanism, the operation of the refrigeration cycle, and the like are the same as those of the well-known conventional technique, and thus the description thereof is omitted. The refrigerant gas containing oil flowing into the accumulator space 10 is separated into refrigerant gas and oil while reaching the delivery pipe 13, and the separated light gas is compressed from the upper space of the accumulator space 10 through the delivery pipe 13 and the communication pipe 15. It is fed to the mechanism unit 3. Further, the lubricating oil 19 accumulated at the bottom of the accumulator space 10 flows out from the small hole 17 provided in the delivery pipe 13 into the compression mechanism unit 3 at a constant flow rate.

上記のように構成された実施の形態１によれば、第１の円筒状シェル１を、軸方向の両端部に直径が拡大された２つの段部Ａ１、Ａ２と、この段部Ａ１、Ａ２にそれぞれ連なる大径部１ａ、１ｂを有する形状とし、第２の円筒状シェル９を、上記第１の円筒状シェル１の２つの段部Ａ１、Ａ２に跨るように設けられた円筒体とし、該第２の円筒状シェル９を第１の円筒状シェル１の段部Ａ１、Ａ２外周面に溶接固定することでアキュムレータ空間１０を形成したので、アキュムレータの剛性を高めることができる。その結果、振動が低減されると共に、ステータ２に比べて比較的温度の低いアキュムレータ空間１０内のガス及び油がステータ２の熱を奪うため、ステータ２の温度上昇による効率低下を防止することもでき、省エネルギーとなる。   According to the first embodiment configured as described above, the first cylindrical shell 1 is divided into two step portions A1 and A2 whose diameters are enlarged at both ends in the axial direction, and the step portions A1 and A2. And the second cylindrical shell 9 is a cylindrical body provided so as to straddle the two step portions A1 and A2 of the first cylindrical shell 1, Since the accumulator space 10 is formed by welding and fixing the second cylindrical shell 9 to the outer peripheral surfaces of the step portions A1 and A2 of the first cylindrical shell 1, the rigidity of the accumulator can be increased. As a result, vibration is reduced and gas and oil in the accumulator space 10 having a relatively low temperature compared to the stator 2 take heat of the stator 2, thereby preventing a reduction in efficiency due to a temperature rise of the stator 2. Can save energy.

また、アキュムレータ空間１０は、第１の円筒状シェル１と第２の円筒状シェル９の２部品で形成したので、部品点数が少なく小型で安価にできる。また、第１の円筒状シェル１を拡管によって加工するようにしたので、設備費用を比較的安価に収めることができる。また、拡管による塑性加工は有底円筒ケーシングを製造するよりも比較的小さい変形率で所望の形状に加工できるため、比較的延性の少ない安価な材料を素材とすることができると共に、特にアキュムレータ空間１０の圧力が高い場合で考慮が必要な変形に伴う板厚減少が小さいという利点がある。また、成形加工が容易であるのでエネルギー消費も削減できる。   In addition, since the accumulator space 10 is formed of two parts, the first cylindrical shell 1 and the second cylindrical shell 9, the number of parts is small and the size can be reduced. Moreover, since the 1st cylindrical shell 1 was processed by pipe expansion, installation cost can be stored comparatively cheaply. In addition, since plastic processing by pipe expansion can be processed into a desired shape with a relatively small deformation rate compared to manufacturing a bottomed cylindrical casing, an inexpensive material with relatively low ductility can be used as a raw material, and in particular, accumulator space. When the pressure of 10 is high, there is an advantage that a reduction in thickness due to deformation that needs to be considered is small. Further, since the molding process is easy, energy consumption can be reduced.

さらに、圧縮機構部３と第１の円筒状シェル１に取り付けられた吸入口１６の接続部、圧縮機構部３と第１の円筒状シェル１の固定部、アキュムレータ空間１０の円周溶接部１１、第２の円筒状シェル９と吸入管１２の接続部、及び第２の円筒状シェル９と送出管１３、管継手１４の接続部は、何れも外部から直接目視できる部分に設けられているため、例えば水没試験による気密性の確認が容易であり、製品の完成状態で確認することも容易である。このため歩留まりの向上を図ることも容易である。また、圧縮機構部３は大径部１ｂに設けられるため、直径の大きな圧縮機構を装置できる。   Furthermore, the connection part of the suction port 16 attached to the compression mechanism part 3 and the 1st cylindrical shell 1, the fixing | fixed part of the compression mechanism part 3 and the 1st cylindrical shell 1, and the circumference welding part 11 of the accumulator space 10 The connecting portion between the second cylindrical shell 9 and the suction pipe 12 and the connecting portion between the second cylindrical shell 9 and the delivery pipe 13 and the pipe joint 14 are all provided in a portion that can be directly seen from the outside. Therefore, for example, it is easy to check the airtightness by a submergence test, and it is also easy to check the finished product. For this reason, it is easy to improve the yield. Moreover, since the compression mechanism part 3 is provided in the large diameter part 1b, a compression mechanism with a large diameter can be installed.

実施の形態２．
次に、この発明の実施の形態２に係るアキュムレータ一体型圧縮機について図７を参照して説明する。なお、各実施の形態及び各図を通じて同一または相当部分には同一符号を付し重複する説明を省略する。図において、第１の円筒状シェル１は、直径が一様の円筒体から構成されている。一方、直径が第１の円筒状シェル１よりも所定寸法大きい第２の円筒状シェル９は、軸方向両端部の直径がそれぞれ縮小され最小内径が第１の円筒状シェル１の外径と同一か若干大きい段部Ｃ１、Ｃ２が形成されている。そして、第２の円筒状シェル９の図の上端部はステータ２の反圧縮機構部側端部近傍に対応する第１の円筒状シェル１の外周面に接合され、下端部はステータ２と圧縮機構部３との間に対応する第１の円筒状シェル１の外周面に接合されている。その他の構成は実施の形態１と同様であるので説明を省略する。 Embodiment 2. FIG.
Next, an accumulator-integrated compressor according to Embodiment 2 of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same or an equivalent part through each embodiment and each figure, and the overlapping description is abbreviate | omitted. In the figure, the first cylindrical shell 1 is composed of a cylindrical body having a uniform diameter. On the other hand, the second cylindrical shell 9 whose diameter is larger than the first cylindrical shell 1 by a predetermined dimension has a reduced diameter at both ends in the axial direction and the same minimum inner diameter as the outer diameter of the first cylindrical shell 1. Slightly larger step portions C1 and C2 are formed. The upper end portion of the second cylindrical shell 9 in the figure is joined to the outer peripheral surface of the first cylindrical shell 1 corresponding to the vicinity of the end portion of the stator 2 on the side opposite to the compression mechanism, and the lower end portion is compressed with the stator 2. It is joined to the outer peripheral surface of the corresponding first cylindrical shell 1 between the mechanism portion 3. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

上記のように構成された実施の形態２においては、実施の形態１と同様の作用効果が得られる他、実施の形態１と同一外径のステータ２を用いた場合、第１の円筒状シェル１の上端及び下端に装着する上部シェル５、及び下部シェル６（図１参照）の直径を、実施の形態１よりも小さくできる。そのため、接合部に要求される耐圧設計も有利になる。また、ステータ２、圧縮機構部３、上部シェル５、及び下部シェル６などの構成部材を、アキュムレータを一体化しない他の機種と共用化できるなどの効果が得られる。   In the second embodiment configured as described above, the same effects as those of the first embodiment can be obtained, and when the stator 2 having the same outer diameter as that of the first embodiment is used, the first cylindrical shell is used. The diameters of the upper shell 5 and the lower shell 6 (see FIG. 1) attached to the upper end and the lower end of 1 can be made smaller than in the first embodiment. Therefore, the withstand voltage design required for the joint is also advantageous. Further, it is possible to obtain an effect that constituent members such as the stator 2, the compression mechanism 3, the upper shell 5, and the lower shell 6 can be shared with other models that do not integrate the accumulator.

実施の形態３．
次に、この発明の実施の形態３に係るアキュムレータ一体型圧縮機について図８を参照して説明する。図において、第１の円筒状シェル１は、図の下側端部にのみ段部Ａ２に連なる大径部１ｂが設けられている。一方、直径が第１の円筒状シェル１よりも所定寸法大きい第２の円筒状シェル９は、図の上端部側の直径が縮小され、最小内径が第１の円筒状シェル１の外径と同一か若干大きい段部Ｃ１が形成されている。そして、第２の円筒状シェル９の図の上端部はステータ２の反圧縮機構部側端部近傍に対応する第１の円筒状シェル１の外周面に接合され、下端部はステータ２と圧縮機構部３との間に対応する第１の円筒状シェル１の大径部外周面に接合されている。その他の構成は実施の形態１と同様であるので説明を省略する。 Embodiment 3 FIG.
Next, an accumulator-integrated compressor according to Embodiment 3 of the present invention will be described with reference to FIG. In the drawing, the first cylindrical shell 1 is provided with a large-diameter portion 1b that continues to the step A2 only at the lower end of the drawing. On the other hand, the second cylindrical shell 9 whose diameter is larger than the first cylindrical shell 1 by a predetermined dimension has a reduced diameter on the upper end side in the figure, and a minimum inner diameter is equal to the outer diameter of the first cylindrical shell 1. The same or slightly larger step C1 is formed. The upper end portion of the second cylindrical shell 9 in the figure is joined to the outer peripheral surface of the first cylindrical shell 1 corresponding to the vicinity of the end portion of the stator 2 on the side opposite to the compression mechanism, and the lower end portion is compressed with the stator 2. The first cylindrical shell 1 corresponding to the mechanism portion 3 is joined to the outer peripheral surface of the large diameter portion. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

上記のように構成された実施の形態３においては、実施の形態１と同様の作用効果が得られる他、第１の円筒状シェル１は、軸方向の一端部側にのみ段部Ａ２を形成すればよいので、図５に例示する拡管機を用いる場合、ワークを加工の途中で反転させる必要がなくなり、製造が容易となる。第２の円筒状シェル９についても同様に製造が容易であるなどの効果が得られる。なお、第１の円筒状シェル１及び第２の円筒状シェル９の段部の位置を図の上下反対に配設しても差し支えない。   In the third embodiment configured as described above, the same effects as those of the first embodiment can be obtained, and the first cylindrical shell 1 has a step A2 only on one end side in the axial direction. Therefore, when the pipe expander illustrated in FIG. 5 is used, it is not necessary to invert the work in the middle of processing, and manufacturing is facilitated. Similarly, the second cylindrical shell 9 can be easily manufactured. Note that the positions of the step portions of the first cylindrical shell 1 and the second cylindrical shell 9 may be arranged upside down in the drawing.

なお、上記接合部は溶接あるいはろう付けとしたが、接合手段は特に限定されるものではなく、何れでもよい。また、圧縮機構部３の例としてシリンダが１つのシングルロータリ圧縮機を概略図として示したが、圧縮機構部３の構成は限定されるものではなく、例えば２シリンダ式の圧縮機構部としても良く、その際は、吸入部１６、連通管１５が２本になり、第２の円筒状シェル９に固定される。また、送出管１３と連通管１５の固定に際して、実施の形態では管継手１４を介して接続したが、直接接続してもよい。さらに、吸入管１２と送出管１３の位相を、１８０度としたが、所望の油分離機能を有すればそれ以外の位相差であっても差し支えない。   In addition, although the said joining part was welded or brazed, the joining means is not specifically limited, Any may be sufficient. In addition, as an example of the compression mechanism unit 3, a single rotary compressor having one cylinder is shown as a schematic diagram. However, the configuration of the compression mechanism unit 3 is not limited, and may be, for example, a two-cylinder compression mechanism unit. In this case, the suction part 16 and the communication pipe 15 are two, and are fixed to the second cylindrical shell 9. Further, in the embodiment, when the delivery pipe 13 and the communication pipe 15 are fixed, they are connected via the pipe joint 14 in the embodiment, but they may be directly connected. Furthermore, although the phase of the suction pipe 12 and the delivery pipe 13 is 180 degrees, other phase differences may be used as long as the desired oil separation function is provided.

また、実施の形態１において、第１の円筒状シェル１の段部Ａを２箇所としたが、２箇所以上でも良く、その場合、アキュムレータの断面２次モーメントが増加し、その結果アキュムレータの剛性が増加する効果がある。その他、第１の円筒状シェル１及び第２の円筒状シェル９の双方に段部を設け、あるいは第１の円筒状シェル１の大径部１ａ（１ｂ）の外径と、第２の円筒状シェル９の外径が同じになるように形成するなど、この発明の範囲内で適宜変形や変更が可能であることは言うまでもない。   In the first embodiment, the stepped portion A of the first cylindrical shell 1 is provided at two places, but it may be provided at two or more places. In this case, the cross-sectional secondary moment of the accumulator increases, and as a result, the rigidity of the accumulator. Has the effect of increasing. In addition, the first cylindrical shell 1 and the second cylindrical shell 9 are both provided with stepped portions, or the outer diameter of the large diameter portion 1a (1b) of the first cylindrical shell 1 and the second cylinder. Needless to say, the outer shells 9 can be modified or changed as appropriate within the scope of the present invention.

１ 第１の円筒状シェル、 １ａ、１ｂ 大径部、 ２ ステータ、 ３ 圧縮機構部、 ５ 上部シェル、 ６ 下部シェル、 ７ 吐出管、 ９ 第２の円筒状シェル、 １０ アキュムレータ空間、 １１ 円周溶接部、 １２ 吸入管、 １３ 送出管、 １４ 管継手、 １５ 連通管、 １６ 吸入口、 １７ ***、 １８ ロータ、 １９ 潤滑油、 ２０ 拡管芯金、 ２１ 拡管外金、 ２１ａ 凸部、 ２２ 芯金ロッド、 ２３ 芯金引き機構、 １００ 円筒部材、 Ａ１、Ａ２、Ｃ１、Ｃ２ 段部。   DESCRIPTION OF SYMBOLS 1 1st cylindrical shell, 1a, 1b large diameter part, 2 stator, 3 compression mechanism part, 5 upper shell, 6 lower shell, 7 discharge pipe, 9 2nd cylindrical shell, 10 accumulator space, 11 circumference Welded part, 12 suction pipe, 13 delivery pipe, 14 pipe joint, 15 communication pipe, 16 suction port, 17 small hole, 18 rotor, 19 lubricating oil, 20 pipe expansion cored bar, 21 pipe expansion outer metal, 21a convex part, 22 cored bar Rod, 23 cored drawing mechanism, 100 cylindrical member, A1, A2, C1, C2 Stepped part.

Claims (6)

直径が一様に形成された、または、軸方向の一端部側及び／もしくは他端部側が段部に連なる大径部に形成された第１の円筒状シェルと、この第１の円筒状シェルの内部に軸方向に並設されたステータ及び圧縮機構部と、上記第１の円筒状シェルの周りに所定間隙を介して配設され、軸方向一端部が上記ステータの反圧縮機構部側端部近傍に対応する上記第１の円筒状シェルの外周部に固定され、軸方向他端部が上記ステータと上記圧縮機構部との間の部分に対応する上記第１の円筒状シェルの外周部に固定され、上記第１の円筒状シェルの外周面との間にアキュムレータ空間を形成する第２の円筒状シェルと、を備えたことを特徴とするアキュムレータ一体型圧縮機。   A first cylindrical shell having a uniform diameter, or one end and / or the other end in the axial direction formed in a large diameter portion connected to the step portion, and the first cylindrical shell And a stator and a compression mechanism portion arranged in parallel in the axial direction, and a predetermined gap around the first cylindrical shell, with one end in the axial direction on the side opposite to the anti-compression mechanism portion of the stator The outer peripheral portion of the first cylindrical shell is fixed to the outer peripheral portion of the first cylindrical shell corresponding to the vicinity of the portion, and the other end in the axial direction corresponds to the portion between the stator and the compression mechanism portion. And a second cylindrical shell that forms an accumulator space between the first cylindrical shell and an outer peripheral surface of the first cylindrical shell. 上記第１の円筒状シェルは、軸方向の両端部に直径が拡大された２つの段部を有し、上記第２の円筒状シェルは、上記第１の円筒状シェルの２つの段部に跨るように設けられた円筒体からなることを特徴とする請求項１記載のアキュムレータ一体型圧縮機。   The first cylindrical shell has two stepped portions whose diameters are enlarged at both axial end portions, and the second cylindrical shell is formed on the two stepped portions of the first cylindrical shell. The accumulator-integrated compressor according to claim 1, comprising a cylindrical body provided so as to straddle. 上記第１の円筒状シェルは直径が一様に形成され、上記第２の円筒状シェルは、軸方向両端部の直径が縮小形成されてなることを特徴とする請求項１記載のアキュムレータ一体型圧縮機。   The accumulator-integrated type according to claim 1, wherein the first cylindrical shell is formed to have a uniform diameter, and the second cylindrical shell is formed to have a reduced diameter at both ends in the axial direction. Compressor. 上記アキュムレータ空間に対する冷媒ガスの吸入管、及び上記アキュムレータから上記圧縮機構部に冷媒ガスを送給する送出管は、上記第２の円筒状シェルを貫通するように取り付けられていることを特徴とする請求項１から請求項３の何れかに記載のアキュムレータ一体型圧縮機。   The refrigerant gas suction pipe for the accumulator space and the delivery pipe for feeding the refrigerant gas from the accumulator to the compression mechanism are attached so as to penetrate the second cylindrical shell. The accumulator-integrated compressor according to any one of claims 1 to 3. 上記アキュムレータ空間は、少なくとも一部が上記ステータに対応する位置に設けられていることを特徴とする請求項１から請求項４の何れかに記載のアキュムレータ一体型圧縮機。   The accumulator-integrated compressor according to any one of claims 1 to 4, wherein at least a part of the accumulator space is provided at a position corresponding to the stator. 上記段部は拡管機によって形成されたものであることを特徴とする請求項１から請求項５の何れかに記載のアキュムレータ一体型圧縮機。   6. The accumulator-integrated compressor according to claim 1, wherein the step portion is formed by a pipe expander.
JP2009149268A 2009-06-24 2009-06-24 Accumulator-integrated compressor Expired - Fee Related JP5173948B2 (en)

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