JP5575000B2 - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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JP5575000B2
JP5575000B2 JP2011024468A JP2011024468A JP5575000B2 JP 5575000 B2 JP5575000 B2 JP 5575000B2 JP 2011024468 A JP2011024468 A JP 2011024468A JP 2011024468 A JP2011024468 A JP 2011024468A JP 5575000 B2 JP5575000 B2 JP 5575000B2
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oil
oil level
rotor
hermetic
discharge
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JP2012163051A (en
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勝巳 遠藤
好範 白藤
宏樹 長澤
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Mitsubishi Electric Corp
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Description

この発明は、密閉型圧縮機に関する。詳しくは、密閉型圧縮機内部における、冷媒吐出ガスに含まれる冷凍機油の分離機構に関する。   The present invention relates to a hermetic compressor. Specifically, the present invention relates to a separation mechanism for refrigerating machine oil contained in refrigerant discharge gas inside a hermetic compressor.

従来の密閉型圧縮機の油分離機構は、例えば、回転子の上部に設けられた円盤形状の油分離器で構成されている（例えば、特許文献１参照）。   A conventional oil separation mechanism of a hermetic compressor is constituted by, for example, a disk-shaped oil separator provided on the upper portion of a rotor (see, for example, Patent Document 1).

従来の密閉型回転圧縮機は、冷媒ガスを吸入して圧縮する圧縮機構部と、圧縮機構部を駆動する電動機が密閉容器内に収容された構成となっている。尚、密閉容器内の下部には、冷凍機油が貯留される油溜まりが形成されている。   A conventional hermetic rotary compressor has a configuration in which a compression mechanism that sucks and compresses refrigerant gas and an electric motor that drives the compression mechanism are housed in a hermetic container. An oil sump for storing refrigeration oil is formed in the lower part of the sealed container.

密閉形回転圧縮機では、吸入された冷媒ガスが圧縮機構部にて圧縮され、圧縮された冷媒ガスは吐出マフラを経て密閉容器内へ吐出される。そして、密閉容器と電動機の固定子との隙間、及び電動機の回転子と固定子との隙間（空隙という）及び回転子に開けられた冷媒ガスが通る風穴を通過して、吐出管から冷凍空調装置等の冷凍サイクルに吐出される。   In the hermetic rotary compressor, the sucked refrigerant gas is compressed by the compression mechanism, and the compressed refrigerant gas is discharged into the sealed container through the discharge muffler. Then, it passes through the gap between the hermetic container and the stator of the motor, the gap between the rotor and the stator of the motor (referred to as the air gap), and the air hole through which the refrigerant gas opened in the rotor passes, and the refrigeration air conditioning from the discharge pipe It is discharged into the refrigeration cycle of the device.

一方、密閉容器の下部の油溜まりに貯留されている冷凍機油は、駆動軸が回転すると駆動軸の内部に形成された流路を上昇し、圧縮機構部の各摺動部に気密油および潤滑油として供給される。   On the other hand, the refrigerating machine oil stored in the oil reservoir at the lower part of the hermetic container rises in the flow path formed inside the drive shaft when the drive shaft rotates, and air-tight oil and lubrication are applied to each sliding portion of the compression mechanism portion. Supplied as oil.

圧縮機構部を潤滑した冷凍機油は、圧縮された冷媒ガスと共に吐出マフラの吐出穴より密閉容器内に放出され、その後密閉容器の下部に落下して再循環する。   The refrigerating machine oil that has lubricated the compression mechanism is discharged into the sealed container through the discharge hole of the discharge muffler together with the compressed refrigerant gas, and then falls to the lower part of the sealed container and recirculates.

実開平７−１０４８６号公報（第２頁、第４図）Japanese Utility Model Publication No. 7-10486 (2nd page, Fig. 4)

密閉形回転圧縮機は、密閉容器内の下部に油溜まりが形成されていて、通常は圧縮機構部の機密性を確保する為にシリンダの上面から吐出マフラの吐出口位に油面が形成される。ベーンの往復運動による油面の波立ち、油の飛び跳ね及び回転子の回転に伴う遠心力・攪拌力により、吐出マフラより吐出された高圧の冷媒と一緒に冷凍機油が吐出管のある圧縮機上部空間に持上げられ、外部の冷凍装置内へ流出しやすくなる。   In a hermetic rotary compressor, an oil sump is formed in the lower part of the hermetic container, and usually an oil level is formed from the upper surface of the cylinder to the discharge port position of the discharge muffler in order to ensure the confidentiality of the compression mechanism. The The compressor upper space where the refrigerating machine oil has the discharge pipe together with the high-pressure refrigerant discharged from the discharge muffler due to the oil surface undulations due to the reciprocating movement of the vane, the oil jumping and the centrifugal force / stirring force accompanying the rotation of the rotor So that it easily flows out into the external refrigeration apparatus.

冷凍装置内に過度に冷凍機油が流入すると、冷凍装置の熱交換率が低下し、冷凍装置の性能が悪化するという課題が生じる。   If the refrigeration oil flows excessively into the refrigeration apparatus, the heat exchange rate of the refrigeration apparatus decreases, and the performance of the refrigeration apparatus deteriorates.

また、密閉容器内に封入されている冷凍機油が過度に減少すると、圧縮機構部における気密性が低下して圧縮性能が低下したり、各摺動部における十分な給油を確保することが出来ず、故障の原因になるなど、密閉型回転圧縮機の性能を維持することが出来なくなるという課題も生じる。   In addition, if the refrigerating machine oil enclosed in the sealed container is excessively reduced, the airtightness in the compression mechanism part is lowered and the compression performance is deteriorated, or sufficient oil supply in each sliding part cannot be ensured. There is also a problem that the performance of the hermetic rotary compressor cannot be maintained, such as causing a failure.

従来の密閉型圧縮機では、密閉容器内に封入されている冷凍機油が冷凍装置に過度に流出するのを制御するために電動機の回転子上部に円盤状の油分離器を付設している。   In the conventional hermetic compressor, a disk-shaped oil separator is attached to the upper part of the rotor of the electric motor in order to control that the refrigerating machine oil enclosed in the hermetic container flows excessively into the refrigerating apparatus.

回転子上部に設けられたカップ状（もしくは円盤状）の油分離器は、駆動軸の回転とともに回転し、圧縮機上部空間の冷媒ガスに含まれた冷凍機油を遠心分離作用によって外側に吹き飛ばし、冷凍機油が冷媒ガスとともに吐出管に流れ込むのを抑制する。   The cup-shaped (or disk-shaped) oil separator provided at the upper part of the rotor rotates with the rotation of the drive shaft, and blows out the refrigeration oil contained in the refrigerant gas in the compressor upper space to the outside by a centrifugal separation action. Refrigeration oil is prevented from flowing into the discharge pipe together with the refrigerant gas.

しかし、高速時や高負荷時など圧縮機構部より吐出された圧縮機上部空間の冷媒ガスに含まれた冷凍機油の量が多い時には、遠心分離作用で十分に冷媒ガスと冷凍機油に分離する効果が得られないことがあった。   However, when the amount of refrigeration oil contained in the refrigerant gas in the compressor head space discharged from the compression mechanism at high speed or high load is large, the effect of sufficiently separating the refrigerant gas and refrigeration oil by the centrifugal separation action May not be obtained.

この発明は、上記のような課題を解決するためになされたもので、ベーンの往復運動による油面の波立ちを抑制し、更には回転子の回転に伴う遠心力・攪拌力を遮断することで、冷凍機油が圧縮機上部空間へ持上げられなくなり、冷媒ガスだけが密閉容器から排出させるようにした密閉型圧縮機を提供する。   The present invention has been made to solve the above-described problems, and suppresses the ripple of the oil surface due to the reciprocating motion of the vanes, and further blocks the centrifugal force / stirring force accompanying the rotation of the rotor. Provided is a hermetic compressor in which refrigeration oil cannot be lifted into the compressor upper space, and only refrigerant gas is discharged from the hermetic container.

この発明に係る密閉型圧縮機は、冷媒ガスをベーンが往復運動するベーン溝を有するシリンダに吸入して圧縮し、吐出マフラの吐出穴から密閉容器内に吐出する圧縮機構部と、圧縮機構部を回転子により駆動する電動機とが密閉容器内に収容される密閉型圧縮機であって、
シリンダの上端面から回転子の下端面の間の所定の位置に、シリンダ及び回転子より所定の距離を空けて１枚以上の油面保持板を設け、油面保持板の少なくとも１枚は吐出マフラの吐出穴より下に設け、該油面保持板の外径は、ベーン溝を覆う径以上で密閉容器の内径より所定寸法小径であることを特徴とする。 A hermetic compressor according to the present invention includes a compression mechanism unit that sucks and compresses refrigerant gas into a cylinder having a vane groove in which a vane reciprocates, and discharges the refrigerant gas into a sealed container from a discharge hole of a discharge muffler. A hermetic compressor in which a motor driven by a rotor is housed in a hermetic container,
At least one oil level holding plate is provided at a predetermined position between the upper end surface of the cylinder and the lower end surface of the rotor at a predetermined distance from the cylinder and the rotor, and at least one of the oil level holding plates is discharged. Provided below the discharge hole of the muffler, and the outer diameter of the oil level retaining plate is equal to or larger than the diameter covering the vane groove and smaller than the inner diameter of the sealed container.

この発明に係る密閉型圧縮機は、油面保持板を設けることで、ベーンの往復運動による油面の波立ちを抑制し、更には回転子の回転に伴う遠心力、攪拌力を遮断することで密閉容器の上部空間へ持上げられなくなり、冷媒ガスだけを密閉容器から排出させることができる。   The hermetic compressor according to the present invention is provided with an oil level holding plate to suppress the ripple of the oil level due to the reciprocating motion of the vane, and further to block the centrifugal force and the stirring force accompanying the rotation of the rotor. It can no longer be lifted into the upper space of the sealed container, and only the refrigerant gas can be discharged from the sealed container.

実施の形態１を示す図で、密閉型回転圧縮機１００の構成を示す縦断面図。FIG. 3 is a longitudinal sectional view showing the configuration of the hermetic rotary compressor 100 according to the first embodiment. 実施の形態１を示す図で、第１の油面保持板１２の平面図。FIG. 5 shows the first embodiment, and is a plan view of a first oil level retaining plate 12. 実施の形態１を示す図で、第１の油面保持板１２の外径とベーン溝６ａの位置関係を示す図。FIG. 5 shows the first embodiment, and shows the positional relationship between the outer diameter of the first oil level retaining plate 12 and the vane groove 6a. 実施の形態１を示す図で、変形例１の密閉型回転圧縮機２００の構成を示す部分縦断面図。FIG. 5 shows the first embodiment, and is a partial longitudinal sectional view showing a configuration of a hermetic rotary compressor 200 according to a first modification. 実施の形態１を示す図で、変形例２の密閉型回転圧縮機３００の圧縮機構部３０１の構成を示す縦断面図。FIG. 5 is a diagram illustrating the first embodiment, and is a longitudinal sectional view illustrating a configuration of a compression mechanism section 301 of a hermetic rotary compressor 300 according to a second modification. 実施の形態１を示す図で、変形例３の密閉型回転圧縮機４００の第１の油面保持板４１２の斜視図。FIG. 5 shows the first embodiment, and is a perspective view of a first oil level retaining plate 412 of the hermetic rotary compressor 400 of Modification 3.

実施の形態１．
図１は実施の形態１を示す図で、密閉型回転圧縮機の構成を示す縦断面図である。図１に示す密閉型回転圧縮機１００（密閉型圧縮機）は、密閉容器９内部に、冷媒を圧縮する圧縮機構部１０１と、圧縮機構部１０１を駆動する電動機１０２とが組み込まれた構成である。さらに、密閉容器９内の底部に、冷凍機油１５が貯留されている。 Embodiment 1 FIG.
FIG. 1 is a diagram showing the first embodiment, and is a longitudinal sectional view showing a configuration of a hermetic rotary compressor. A hermetic rotary compressor 100 (hermetic compressor) shown in FIG. 1 has a configuration in which a compression mechanism unit 101 that compresses a refrigerant and an electric motor 102 that drives the compression mechanism unit 101 are incorporated in the hermetic container 9. is there. Furthermore, the refrigerating machine oil 15 is stored at the bottom of the sealed container 9.

圧縮機構部１０１は、シリンダ１、上軸受２、下軸受３、クランク軸４、ローリングピストン５、吐出マフラ１０、第１の油面保持板１２、ベーン６（図３参照）等で構成される。   The compression mechanism 101 includes a cylinder 1, an upper bearing 2, a lower bearing 3, a crankshaft 4, a rolling piston 5, a discharge muffler 10, a first oil level retaining plate 12, a vane 6 (see FIG. 3), and the like. .

本実施の形態は、圧縮機構部１０１が第１の油面保持板１２を備える点に特徴がある。第１の油面保持板１２について説明する前に、圧縮機構部１０１の構成について説明する。   The present embodiment is characterized in that the compression mechanism unit 101 includes the first oil level retaining plate 12. Before describing the first oil level retaining plate 12, the configuration of the compression mechanism unit 101 will be described.

内部に圧縮室が形成されるシリンダ１は、外周が平面視略円形で、内部に平面視略円形の空間であるシリンダ室を備える。シリンダ室は、軸方向両端が開口している。シリンダ１は、側面視で所定の軸方向の高さを持つ。   A cylinder 1 in which a compression chamber is formed has a cylinder chamber whose outer periphery is substantially circular in a plan view and is a space that is substantially circular in a plan view. The cylinder chamber is open at both axial ends. The cylinder 1 has a predetermined axial height in a side view.

シリンダ１の略円形の空間であるシリンダ室に連通し、半径方向に延びる平行なベーン溝６ａ（図３参照）が軸方向に貫通して設けられる。   A parallel vane groove 6a (see FIG. 3) that communicates with a cylinder chamber that is a substantially circular space of the cylinder 1 and extends in the radial direction is provided so as to penetrate in the axial direction.

また、ベーン溝６ａの背面（外側）に、ベーン溝６ａに連通する平面視略円形の空間である背圧室（図示せず）が設けられる。   Further, a back pressure chamber (not shown) which is a substantially circular space in plan view communicating with the vane groove 6a is provided on the back surface (outside) of the vane groove 6a.

シリンダ１には、冷凍サイクルからの吸入ガスが通る吸入ポート（図示せず）が、シリンダ１の外周面からシリンダ室に貫通している。   An intake port (not shown) through which intake gas from the refrigeration cycle passes through the cylinder 1 passes through the cylinder chamber from the outer peripheral surface of the cylinder 1.

シリンダ１には、略円形の空間であるシリンダ室を形成する円の縁部付近（電動機１０２側の端面）を切り欠いた吐出ポート（図示せず）が設けられる。   The cylinder 1 is provided with a discharge port (not shown) in which the vicinity of the edge of the circle forming the cylinder chamber which is a substantially circular space (the end face on the side of the electric motor 102) is cut out.

ローリングピストン５が、シリンダ室内を偏心回転する。ローリングピストン５はリング状で、ローリングピストン５の内周がクランク軸４の偏心軸部４ｄに摺動自在に嵌合する。   The rolling piston 5 rotates eccentrically in the cylinder chamber. The rolling piston 5 has a ring shape, and the inner periphery of the rolling piston 5 is slidably fitted to the eccentric shaft portion 4 d of the crankshaft 4.

ベーン６がシリンダ１のベーン溝６ａ内に収納され、背圧室に設けられるベーンスプリング（図示せず）でベーン６が常にローリングピストン５に押し付けられている。密閉型回転圧縮機１００は、密閉容器９内が高圧であるから、運転を開始するとベーン６の背面（背圧室側）に密閉容器９内の高圧とシリンダ室の圧力との差圧による力が作用するので、ベーンスプリングは主に密閉型回転圧縮機１００の起動時（密閉容器９内とシリンダ室の圧力に差がない状態）に、ベーン６をローリングピストン５に押し付ける目的で使用される。   The vane 6 is accommodated in the vane groove 6a of the cylinder 1, and the vane 6 is always pressed against the rolling piston 5 by a vane spring (not shown) provided in the back pressure chamber. Since the hermetic rotary compressor 100 has a high pressure inside the hermetic container 9, when the operation is started, the force due to the differential pressure between the high pressure in the hermetic container 9 and the pressure in the cylinder chamber on the back surface (back pressure chamber side) of the vane 6. Therefore, the vane spring is mainly used for the purpose of pressing the vane 6 against the rolling piston 5 when the hermetic rotary compressor 100 is started (when there is no difference in pressure between the sealed container 9 and the cylinder chamber). .

ベーン６の形状は、平たい（周方向の厚さが、径方向及び軸方向の長さよりも小さい）略直方体である。   The shape of the vane 6 is a flat shape (the thickness in the circumferential direction is smaller than the length in the radial direction and the axial direction).

上軸受２は、クランク軸４の主軸部４ｂ（偏心軸部４ｄより上の部分）に摺動自在に嵌合するとともに、シリンダ１のシリンダ室（ベーン溝６ａも含む）の一方の端面（電動機１０２側）を閉塞する。   The upper bearing 2 is slidably fitted to the main shaft portion 4b (a portion above the eccentric shaft portion 4d) of the crankshaft 4, and one end surface (electric motor) of the cylinder chamber of the cylinder 1 (including the vane groove 6a). 102 side) is closed.

上軸受２に、吐出弁（図示せず）が取り付けられる。上軸受２は、側面視略逆Ｔ字状である。   A discharge valve (not shown) is attached to the upper bearing 2. The upper bearing 2 has a substantially inverted T shape when viewed from the side.

下軸受３が、クランク軸４の副軸部４ｃ（偏心軸部４ｄより下の部分）に摺動自在に嵌合するとともに、シリンダ１のシリンダ室（ベーン溝６ａも含む）の他方の端面（冷凍機油側）を閉塞する。下軸受３は、側面視略Ｔ字状である。   The lower bearing 3 is slidably fitted to the auxiliary shaft portion 4c (the portion below the eccentric shaft portion 4d) of the crankshaft 4, and the other end surface of the cylinder chamber (including the vane groove 6a) of the cylinder 1 ( Close the refrigerator oil side. The lower bearing 3 is substantially T-shaped when viewed from the side.

上軸受２には、その外側（電動機１０２側）に吐出マフラ１０が取り付けられる。上軸受２の吐出弁から吐出される高温・高圧の吐出ガスは、一端吐出マフラ１０に入り、その後吐出マフラ１０の吐出穴１０ａから密閉容器９内に放出される。   A discharge muffler 10 is attached to the upper bearing 2 on the outer side (motor 102 side). The high-temperature and high-pressure discharge gas discharged from the discharge valve of the upper bearing 2 enters the discharge muffler 10 at one end, and is then discharged from the discharge hole 10 a of the discharge muffler 10 into the sealed container 9.

密閉容器９の横（側部）に、冷凍サイクルからの低圧の冷媒ガスを吸入し、液冷媒が戻る場合に液冷媒が直接シリンダ１のシリンダ室に吸入されるのを抑制する吸入マフラ２０が設けられる。吸入マフラ２０は、シリンダ１の吸入ポートに吸入管２１を介して接続する。吸入マフラ２０は、溶接等により密閉容器９の側面に固定される。   A suction muffler 20 that sucks low-pressure refrigerant gas from the refrigeration cycle and suppresses the liquid refrigerant from being directly sucked into the cylinder chamber of the cylinder 1 when the liquid refrigerant returns to the side (side) of the sealed container 9. Provided. The suction muffler 20 is connected to the suction port of the cylinder 1 via a suction pipe 21. The suction muffler 20 is fixed to the side surface of the sealed container 9 by welding or the like.

圧縮機構部１０１で圧縮された高温・高圧のガス冷媒は、吐出マフラ１０の吐出穴１０ａから電動機１０２を通過して、吐出管１１から外部の冷媒回路（図示せず）へ吐出される。   The high-temperature and high-pressure gas refrigerant compressed by the compression mechanism 101 passes through the electric motor 102 from the discharge hole 10a of the discharge muffler 10 and is discharged from the discharge pipe 11 to an external refrigerant circuit (not shown).

電動機１０２は、固定子７と、回転子８とを備える。電動機１０２は、例えば、回転子８に永久磁石を使用するブラシレスＤＣモータである。但し、誘導電動機でもよい。   The electric motor 102 includes a stator 7 and a rotor 8. The electric motor 102 is, for example, a brushless DC motor that uses a permanent magnet for the rotor 8. However, an induction motor may be used.

外部電源から電動機１０２の固定子７に、ガラス端子３０、リード線３１を経由して電力（三相電力、単相誘導電動機の場合は単相電力）が供給される。   Power (three-phase power, single-phase power in the case of a single-phase induction motor) is supplied from an external power source to the stator 7 of the motor 102 via the glass terminal 30 and the lead wire 31.

次に、本実施の形態の特徴部分である、第１の油面保持板１２について説明する。図２、図３は実施の形態１を示す図で、図２は第１の油面保持板１２の平面図、図３は第１の油面保持板１２の外径とベーン溝６ａの位置関係を示す図である。   Next, the first oil level retaining plate 12 which is a characteristic part of the present embodiment will be described. 2 and 3 are diagrams showing the first embodiment. FIG. 2 is a plan view of the first oil level holding plate 12. FIG. 3 is an outer diameter of the first oil level holding plate 12 and the position of the vane groove 6a. It is a figure which shows a relationship.

図１に示したように、シリンダ１の上端面より所定の間隔を空けて、１枚以上の第１の油面保持板１２（油面保持板）を設ける。図１の一例では、１枚の第１の油面保持板１２を設けている。第１の油面保持板１２は、吐出マフラ１０の吐出穴１０ａより下に設けている。   As shown in FIG. 1, one or more first oil level holding plates 12 (oil level holding plates) are provided at a predetermined interval from the upper end surface of the cylinder 1. In the example of FIG. 1, one first oil level holding plate 12 is provided. The first oil level retaining plate 12 is provided below the discharge hole 10 a of the discharge muffler 10.

図２に示すように、第１の油面保持板１２は、平面視で略ドーナッツ形状である。油面保持板外径１２ａと油面保持板内径１２ｂとの間の略ドーナッツ状の部分が油面保持部となる。   As shown in FIG. 2, the first oil level retaining plate 12 has a substantially donut shape in plan view. The substantially donut-shaped portion between the oil level holding plate outer diameter 12a and the oil level holding plate inner diameter 12b becomes the oil level holding part.

また、第１の油面保持板１２は、油面保持板内径１２ｂから内側に突出する固定部１２ｃが周方向に略等間隔に形成され、夫々の固定部１２ｃにはボルトが挿入されるボルト挿入孔１２ｄが形成されている。   Further, the first oil level holding plate 12 is formed with fixing portions 12c protruding inward from the oil level holding plate inner diameter 12b at substantially equal intervals in the circumferential direction, and bolts into which bolts are inserted into the respective fixing portions 12c. An insertion hole 12d is formed.

第１の油面保持板１２は、例えば、ボルト挿入孔１２ｄを利用して、上軸受２をシリンダ１に固定する固定ボルト４０により、上軸受２のシリンダ閉塞部（鍔部）の外側（電動機１０２側）の面に固定される。但し、密閉容器９の内径に固定しても同様の効果が得られる。また、シリンダ１の上面に固定するようにしてもよい。   The first oil level retaining plate 12 is, for example, a fixing bolt 40 that fixes the upper bearing 2 to the cylinder 1 by using a bolt insertion hole 12d. 102 side). However, the same effect can be obtained even if the inner diameter of the sealed container 9 is fixed. Further, it may be fixed to the upper surface of the cylinder 1.

図３に示すように、少なくとも１枚の第１の油面保持板１２は、油面保持板外径１２ａがベーン溝６ａを覆う径より大きく、密閉容器９の内径（シリンダ１の外径）より、所定寸法やや小径であることを特徴とする。   As shown in FIG. 3, the at least one first oil level retaining plate 12 has an oil level retaining plate outer diameter 12a larger than the diameter covering the vane groove 6a, and the inner diameter of the sealed container 9 (the outer diameter of the cylinder 1). Therefore, it is characterized by having a predetermined dimension and a slightly smaller diameter.

また、上記１枚の第１の油面保持板１２の油面保持板内径１２ｂは、吐出マフラ１０の外径と略同等である。従って、第１の油面保持板１２は、冷凍機油１５の油面を略覆うことになる。   Further, the oil level holding plate inner diameter 12 b of the one first oil level holding plate 12 is substantially equal to the outer diameter of the discharge muffler 10. Accordingly, the first oil level retaining plate 12 substantially covers the oil level of the refrigerating machine oil 15.

第１の油面保持板１２によりベーン６の往復運動による冷凍機油１５の油面の波立ちを抑制し、更には回転子８の回転に伴う遠心力・攪拌力を遮断する。それにより、冷凍機油１５が密閉容器９の上部空間へ持上げられなくなり、冷媒ガスだけが密閉容器９から排出される。従って、冷凍装置に放出される冷凍機油１５の量を減少させることができ、油上りによる冷凍装置の性能低下及び密閉型回転圧縮機１００の性能劣化を抑制することが出来る。   The first oil level holding plate 12 suppresses the ripples of the oil level of the refrigerating machine oil 15 due to the reciprocating motion of the vanes 6, and further blocks the centrifugal force and stirring force associated with the rotation of the rotor 8. Thereby, the refrigerating machine oil 15 cannot be lifted to the upper space of the sealed container 9, and only the refrigerant gas is discharged from the sealed container 9. Therefore, the amount of the refrigerating machine oil 15 released to the refrigerating apparatus can be reduced, and the performance deterioration of the refrigerating apparatus and the performance deterioration of the hermetic rotary compressor 100 due to the oil rising can be suppressed.

このように、図１に示す密閉型回転圧縮機１００によれば、冷凍機油１５が密閉容器９の上部空間へ持上げられなくなり、従来の密閉型回転圧縮機のように、回転子８の上部に油分離機構を設ける必要がなくなる。   Thus, according to the hermetic rotary compressor 100 shown in FIG. 1, the refrigeration oil 15 can no longer be lifted into the upper space of the hermetic container 9, and the upper part of the rotor 8 is placed like the conventional hermetic rotary compressor. There is no need to provide an oil separation mechanism.

但し、回転子８の上部に油分離機構を設ければ、更に冷凍装置に放出される冷凍機油の量を減少させることができ、更に油上りによる冷凍装置の性能低下および密閉型回転圧縮機１００自体の性能劣化を抑制することが出来る。   However, if an oil separation mechanism is provided in the upper part of the rotor 8, the amount of refrigerating machine oil discharged to the refrigerating apparatus can be further reduced. Further, the performance of the refrigerating apparatus is reduced due to the oil rising, and the hermetic rotary compressor 100 is further reduced. The performance degradation of itself can be suppressed.

また、図２に示すように、第１の油面保持板１２の形状を略ドーナッツ形状としているが、第１の油面保持板１２を設ける目的がベーン６の往復運動による冷凍機油１５の油面の波立ちを抑制することであるから、略ドーナッツ形状でなくてもベーン溝６ａの上部のみ覆う形状でも効果はある。   As shown in FIG. 2, the shape of the first oil level retaining plate 12 is substantially donut shape, but the purpose of providing the first oil level retaining plate 12 is the oil of the refrigerating machine oil 15 by the reciprocating motion of the vane 6. Since it is to suppress the undulation of the surface, even if it is not substantially doughnut-shaped, a shape that covers only the upper part of the vane groove 6a is effective.

但し、冷凍機油１５の油面は、回転子８の回転に伴う遠心力・攪拌力の影響を受けることから、略ドーナッツ形状の第１の油面保持板１２より効果は少ない。   However, since the oil level of the refrigeration oil 15 is affected by the centrifugal force and stirring force accompanying the rotation of the rotor 8, the effect is less than that of the first oil level holding plate 12 having a substantially donut shape.

また、第１の油面保持板１２の最大径は、密閉容器９の内径まで可能であるが、その場合第１の油面保持板１２の上部にて分離した冷凍機油１５を油溜まりへ戻す為の流路が必要であり、穴開け加工や切欠き形状を追加する必要がある。   In addition, the maximum diameter of the first oil level retaining plate 12 can be up to the inner diameter of the sealed container 9, but in that case, the refrigerating machine oil 15 separated at the upper portion of the first oil level retaining plate 12 is returned to the oil reservoir. For this purpose, it is necessary to add a drilling process or notch shape.

図４は実施の形態１を示す図で、変形例１の密閉型回転圧縮機２００の構成を示す部分縦断面図である。図４に示すように、変形例１の密閉型回転圧縮機２００は、図１の密閉型回転圧縮機１００の第１の油面保持板１２に加えて、第１の油面保持板１２とは別に、１枚以上の第２の油面保持板１３（油面保持板）が回転子８の下端より所定間隔を空けて設けられている。図４では、１枚の第２の油面保持板１３の例を示している。その他の構成は、密閉型回転圧縮機１００と同様である。   FIG. 4 is a diagram showing the first embodiment, and is a partial longitudinal sectional view showing a configuration of a hermetic rotary compressor 200 according to the first modification. As shown in FIG. 4, the hermetic rotary compressor 200 of Modification 1 includes a first oil level holding plate 12 in addition to the first oil level holding plate 12 of the hermetic rotary compressor 100 of FIG. 1. In addition, one or more second oil level holding plates 13 (oil level holding plates) are provided at a predetermined interval from the lower end of the rotor 8. FIG. 4 shows an example of one second oil level retaining plate 13. Other configurations are the same as those of the hermetic rotary compressor 100.

別の第２の油面保持板１３は、略ドーナッツ形状であり、その外径は回転子８の外径より所定寸法やや大径であることを特徴とする。   Another second oil level retaining plate 13 has a substantially donut shape, and its outer diameter is a predetermined dimension slightly larger than the outer diameter of the rotor 8.

第２の油面保持板１３は、例えば、上軸受２の軸受部の回転子８側の端部に圧入等により固定される。   For example, the second oil level retaining plate 13 is fixed to the end of the bearing portion of the upper bearing 2 on the rotor 8 side by press-fitting or the like.

変形例１の密閉型回転圧縮機２００は、第１の油面保持板１２とは別に回転子８の下端より所定間隔を空けて１枚以上の第２の油面保持板１３を設けることで、ベーン６の往復運動による冷凍機油１５の油面の波立ちを抑制することは勿論のこと、回転子８の回転に伴う遠心力・攪拌力の影響を遮断する効果が増す。   The hermetic rotary compressor 200 of Modification 1 is provided with one or more second oil level holding plates 13 at a predetermined interval from the lower end of the rotor 8 separately from the first oil level holding plate 12. The effect of blocking the influence of centrifugal force and stirring force accompanying the rotation of the rotor 8 is increased as well as suppressing the ripple of the oil surface of the refrigerating machine oil 15 due to the reciprocating motion of the vane 6.

それにより、吐出マフラ１０より吐出された冷凍機油１５を含んだ吐出ガスから冷凍機油１５のみが滴下しやすくなる。そして、冷凍機油１５が油溜まりに落ちることから、冷凍機油１５が密閉容器９の上部空間へ持上げられなくなり、冷媒ガスだけが密閉容器９から排出される。従って、冷凍空調装置等の冷凍サイクルに放出される冷凍機油１５の量を減少させることができ、油上りによる冷凍空調装置等の性能低下および密閉型回転圧縮機２００自体の性能劣化を抑制することが出来る。   Thereby, only the refrigerating machine oil 15 becomes easy to dripping from the discharge gas containing the refrigerating machine oil 15 discharged from the discharge muffler 10. Since the refrigerating machine oil 15 falls into the oil reservoir, the refrigerating machine oil 15 cannot be lifted to the upper space of the sealed container 9 and only the refrigerant gas is discharged from the sealed container 9. Accordingly, the amount of the refrigerating machine oil 15 released to the refrigeration cycle of the refrigeration air conditioner or the like can be reduced, and the performance deterioration of the refrigeration air conditioner or the like due to the oil rising and the performance deterioration of the hermetic rotary compressor 200 itself can be suppressed. I can do it.

図５は実施の形態１を示す図で、変形例２の密閉型回転圧縮機３００の圧縮機構部３０１の構成を示す縦断面図である。変形例２の密閉型回転圧縮機３００は、吐出マフラ１１０に油面保持板が一体に形成されている。その他の構成は、密閉型回転圧縮機１００と同様である。   FIG. 5 shows the first embodiment, and is a longitudinal sectional view showing the configuration of the compression mechanism 301 of the hermetic rotary compressor 300 of the second modification. In the hermetic rotary compressor 300 according to the second modification, an oil level holding plate is integrally formed with the discharge muffler 110. Other configurations are the same as those of the hermetic rotary compressor 100.

シリンダ１の上端面より所定の間隔を空けて、吐出マフラ１１０の鍔部が径方向に拡大されている。この吐出マフラ１１０の外径は、図３に示した第１の油面保持板１２の油面保持板外径１２ａと同様に、ベーン溝６ａを覆う径より大きく、密閉容器９の内径（シリンダ１の外径）より、所定寸法やや小径であることを特徴とする。   The flange portion of the discharge muffler 110 is enlarged in the radial direction at a predetermined interval from the upper end surface of the cylinder 1. The outer diameter of the discharge muffler 110 is larger than the diameter covering the vane groove 6a, similar to the outer diameter 12a of the oil level holding plate 12 of the first oil level holding plate 12 shown in FIG. 1 outer diameter), and a predetermined dimension is slightly smaller.

変形例２の密閉型回転圧縮機３００の油面保持板が一体に形成された吐出マフラ１１０によりベーン６の往復運動による冷凍機油１５の油面の波立ちを抑制する。更に、回転子８の回転に伴う遠心力・攪拌力を遮断することで冷凍機油１５が密閉容器９の上部空間へ持上げられなくなり、冷媒ガスだけを密閉容器９から排出させる。そのため、外部の冷凍空調装置等の冷凍サイクルに放出される冷凍機油１５の量を減少させることができ、油上りによる冷凍空調装置等の性能低下及び密閉型回転圧縮機３００自体の性能劣化を抑制することが出来る。   The discharge muffler 110 integrally formed with the oil level holding plate of the hermetic rotary compressor 300 of Modification 2 suppresses the oil level of the refrigerating machine oil 15 due to the reciprocating motion of the vane 6. Further, by interrupting the centrifugal force / stirring force accompanying the rotation of the rotor 8, the refrigerating machine oil 15 cannot be lifted to the upper space of the sealed container 9, and only the refrigerant gas is discharged from the sealed container 9. Therefore, the amount of the refrigerating machine oil 15 released to the refrigeration cycle such as an external refrigeration air conditioner can be reduced, and the performance deterioration of the refrigeration air conditioner and the like due to the oil rising and the performance deterioration of the hermetic rotary compressor 300 itself are suppressed. I can do it.

変形例２の密閉型回転圧縮機３００によれば、油面保持板の機能を吐出マフラ１１０に持たせることで部品点数を削減することができ、製造コストを低減することができる。   According to the hermetic rotary compressor 300 of the second modification, the discharge muffler 110 can be provided with the function of the oil level retaining plate, so that the number of parts can be reduced and the manufacturing cost can be reduced.

尚、上軸受２のツバ部（シリンダ閉塞部）を、径方向に拡大することでも、同様の効果を奏する。   It should be noted that the same effect can be obtained by enlarging the flange portion (cylinder closing portion) of the upper bearing 2 in the radial direction.

図６は実施の形態１を示す図で、変形例３の密閉型回転圧縮機４００の第１の油面保持板４１２の斜視図である。変形例３の密閉型回転圧縮機４００は、第１の油面保持板１２に相当する第１の油面保持板４１２、図示は省くが第２の油面保持板１３に相当する第２の油面保持板４１３に、ディンプル加工が施されている。   FIG. 6 is a diagram showing the first embodiment, and is a perspective view of the first oil level retaining plate 412 of the hermetic rotary compressor 400 of the third modification. The hermetic rotary compressor 400 of Modification 3 includes a first oil level holding plate 412 corresponding to the first oil level holding plate 12, and a second oil level holding plate 13 corresponding to the second oil level holding plate 13 although not shown. The oil level holding plate 413 is dimple processed.

第１の油面保持板４１２もしくは第２の油面保持板４１３に、ディンプル加工等の表面積を大きくする加工を施すことで、冷凍機油１５を含んだ吐出ガスから冷凍機油１５がからめ取られ、冷凍機油１５が密閉容器９の上部空間へ持上げられなくなり、冷媒ガスだけが密閉容器９から排出される。   The first oil level retaining plate 412 or the second oil level retaining plate 413 is subjected to processing to increase the surface area such as dimple processing, so that the refrigerating machine oil 15 is entangled from the discharge gas containing the refrigerating machine oil 15, The refrigerating machine oil 15 cannot be lifted to the upper space of the sealed container 9, and only the refrigerant gas is discharged from the sealed container 9.

第１の油面保持板４１２もしくは第２の油面保持板４１３の表裏両面に、ディンプル加工を施すのが好ましい。   It is preferable to perform dimple processing on both the front and back surfaces of the first oil level holding plate 412 or the second oil level holding plate 413.

但し、第１の油面保持板４１２もしくは第２の油面保持板４１３の表裏両面ではなく、片面にディンプル加工を施してもよい。その場合、第１の油面保持板４１２については、冷凍機油１５を含んだ吐出ガスが存在する電動機側の片面にディンプル加工を施すのがよい。また、第２の油面保持板４１３は、その反対で、電動機の反対側の片面にディンプル加工を施すのがよい。   However, dimple processing may be performed on one side of the first oil level holding plate 412 or the second oil level holding plate 413 instead of the front and back sides. In that case, the first oil level holding plate 412 is preferably subjected to dimple processing on one side of the motor on which the discharge gas containing the refrigerating machine oil 15 exists. On the other hand, the second oil level retaining plate 413 is preferably subjected to dimple processing on one side opposite to the electric motor.

ディンプル加工等の表面積を大きくする加工を第１の油面保持板４１２もしくは第２の油面保持板４１３に施すことで、冷凍機油１５を含んだ吐出ガスから冷凍機油１５がからめ取られ、冷媒ガスだけが密閉容器９から排出される。そのため、冷凍空調装置等に放出される冷凍機油１５の量を減少させることができ、油上りによる冷凍空調装置等の性能低下及び密閉型回転圧縮機４００自体の性能劣化を抑制することが出来る。   By applying a process for increasing the surface area such as dimple processing to the first oil level holding plate 412 or the second oil level holding plate 413, the refrigerating machine oil 15 is entangled from the discharge gas containing the refrigerating machine oil 15, and the refrigerant Only gas is discharged from the sealed container 9. Therefore, the amount of the refrigerating machine oil 15 released to the refrigeration air conditioner or the like can be reduced, and the performance deterioration of the refrigeration air conditioner or the like due to the oil rising and the performance deterioration of the hermetic rotary compressor 400 itself can be suppressed.

ディンプル加工は表面積を大きくすることが目的であり、穴開け加工や波状形状等に加工したり、表面にメッシュ等の多孔部材を張付けても同様な効果が得られることは言うまでもない。   The dimple processing is intended to increase the surface area, and it goes without saying that the same effect can be obtained even if the surface is drilled or processed into a wavy shape or a porous member such as a mesh is attached to the surface.

１ シリンダ、２ 上軸受、３ 下軸受、４ クランク軸、４ｂ 主軸部、４ｃ 副軸部、４ｄ 偏心軸部、５ ローリングピストン、６ ベーン、６ａ ベーン溝、７ 固定子、８ 回転子、９ 密閉容器、１０ 吐出マフラ、１０ａ 吐出穴、１１ 吐出管、１２ 第１の油面保持板、１２ａ 油面保持板外径、１２ｂ 油面保持板内径、１２ｃ 固定部、１２ｄ ボルト挿入孔、１３ 第２の油面保持板、１５ 冷凍機油、２０ 吸入マフラ、２１ 吸入管、３０ ガラス端子、３１ リード線、４０ 固定ボルト、１００ 密閉型回転圧縮機、１０１ 圧縮機構部、１０２ 電動機、１１０ 吐出マフラ、２００ 密閉型回転圧縮機、３００ 密閉型回転圧縮機、３０１ 圧縮機構部、４００ 密閉型回転圧縮機、４１２ 第１の油面保持板、４１３ 第２の油面保持板。   1 Cylinder, 2 Upper bearing, 3 Lower bearing, 4 Crankshaft, 4b Main shaft, 4c Subshaft, 4d Eccentric shaft, 5 Rolling piston, 6 vane, 6a Vane groove, 7 Stator, 8 Rotor, 9 Sealed Container, 10 Discharge muffler, 10a Discharge hole, 11 Discharge pipe, 12 First oil level retaining plate, 12a Oil level retaining plate outer diameter, 12b Oil level retaining plate inner diameter, 12c Fixing part, 12d Bolt insertion hole, 13 Second Oil level holding plate, 15 refrigerating machine oil, 20 suction muffler, 21 suction pipe, 30 glass terminal, 31 lead wire, 40 fixing bolt, 100 hermetic rotary compressor, 101 compression mechanism, 102 electric motor, 110 discharge muffler, 200 Hermetic rotary compressor, 300 Hermetic rotary compressor, 301 Compression mechanism, 400 Hermetic rotary compressor, 412 First oil level retaining plate, 413 Second oil Surface holding plate.

Claims (2)

ベーンが往復運動するベーン溝を有するシリンダに冷媒ガスを吸入して圧縮し、吐出マフラの吐出穴から密閉容器内に吐出する圧縮機構部と、前記圧縮機構部を回転子により駆動する電動機とが密閉容器内に収容される密閉型圧縮機であって、
前記シリンダの上端面から所定の距離を空けて、前記吐出マフラの前記吐出穴より下の高さに設けられ、前記ベーン溝を覆う径以上で前記密閉容器の内径より所定寸法小径である第１の板と、
前記回転子の下端面より所定の距離を空けて、前記吐出マフラの前記吐出穴の高さ位置より上に設けられ、前記回転子の外径より所定寸法大径の第２の板と
を備え、
前記第１の板には、前記回転子側の面だけにディンプル加工と波状加工といずれかが施され、前記第２の板には、前記回転子側と反対側の面だけにディンプル加工と波状加工といずれかが施された
ことを特徴とする密閉型圧縮機。 A compression mechanism that sucks and compresses refrigerant gas into a cylinder having a vane groove in which a vane reciprocates and discharges the refrigerant gas into a sealed container from a discharge hole of a discharge muffler, and an electric motor that drives the compression mechanism by a rotor A hermetic compressor housed in a hermetic container,
A first gap is provided at a height below the discharge hole of the discharge muffler at a predetermined distance from the upper end surface of the cylinder, and is a diameter that is equal to or greater than a diameter that covers the vane groove and smaller than an inner diameter of the sealed container. The board,
A second plate having a predetermined distance larger than the outer diameter of the rotor, provided at a predetermined distance from the lower end surface of the rotor and above the height position of the discharge hole of the discharge muffler;
With
The first plate is either dimpled or corrugated only on the rotor side surface, and the second plate is dimpled only on the surface opposite to the rotor side. A hermetic compressor that has been subjected to either wavy processing . 前記圧縮機構部は、クランク軸を支持する上軸受を備え、前記第１の板を、前記吐出マフラの鍔部または前記上軸受の鍔部を径方向に延出して形成したことを特徴とする請求項１記載の密閉型圧縮機。 The compression mechanism portion includes an upper bearing that supports a crankshaft, and the first plate is formed by extending a flange portion of the discharge muffler or a flange portion of the upper bearing in a radial direction. The hermetic compressor according to claim 1 .
JP2011024468A 2011-02-07 2011-02-07 Hermetic compressor Expired - Fee Related JP5575000B2 (en)

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JPS56143391A (en) * 1980-04-11 1981-11-09 Hitachi Ltd Rotary compressor
JPS5958796U (en) * 1982-10-13 1984-04-17 松下冷機株式会社 Rotary compressor oil separation equipment
JPS60112685U (en) * 1983-12-29 1985-07-30 ダイキン工業株式会社 hermetic compressor
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