JP2008291659A

JP2008291659A - Hermetic compressor

Info

Publication number: JP2008291659A
Application number: JP2007135151A
Authority: JP
Inventors: Hideyuki Horibatake; 秀幸堀畑; Hiroshi Shiizaki; 啓椎崎
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2007-05-22
Filing date: 2007-05-22
Publication date: 2008-12-04

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic compressor capable of reducing oil delivery quantity to an outside of a hermetic vessel by shutting off oil flow to the outside of the hermetic vessel in a flow process of oil filled in the hermetic vessel. <P>SOLUTION: In the hermetic compressor provided with an electric element 2 and a compression mechanism 3 in the hermetic vessel 1, a donut shape shielding mesh plate 11 having hollow part at a center part is provided above the electric element 2 at an upper part of the hermetic vessel 1, and hollow part diameter A dimension of the shielding plate 11 and rotor outer diameter B dimension are formed with satisfying a relation A<B. Consequently, a route of oil flow discharging to the outside of the hermetic vessel 1 is shut off in the flow process of the oil filled in the hermetic vessel and oil discharge quantity to the outside of the hermetic vessel 1 can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、密閉容器内に電動要素と圧縮要素とを備えてなる、密閉型圧縮機の構造に係り、特に密閉容器内の冷媒ガスを密閉容器外へ吐出するために設けられた、吐出構造に関するものである。 The present invention relates to a structure of a hermetic compressor including an electric element and a compression element in a hermetic container, and in particular, a discharge structure provided for discharging refrigerant gas in the hermetic container to the outside of the hermetic container. It is about.

従来の密閉型圧縮機としては、例えば特許文献１に示されたものがあった。特許文献１に示されるように密閉容器内の上部に電動要素を、下部に圧縮要素を配置しており、電動要素は圧縮要素を構成する回転軸に連結され回転する回転子と、この回転子を回転させる密閉容器の内周面に固定された固定子とで構成される。圧縮要素には、環状で中空のシリンダと、このシリンダの上下端面を挟み込んで閉塞すると共に、回転軸を支承する上軸受、中間仕切板、下軸受とが配置され、閉塞されたシリンダ内には回転軸の一部でもある偏心軸に係合するローラが設けられ、電動要素の回転子からの駆動によりシリンダ内を偏心して回転し、冷媒が圧縮される構造となっている。 As a conventional hermetic compressor, there has been one disclosed in Patent Document 1, for example. As shown in Patent Document 1, an electric element is arranged in the upper part of the sealed container, and a compression element is arranged in the lower part. The electric element is connected to a rotating shaft constituting the compression element and rotates, and this rotor It is comprised with the stator fixed to the internal peripheral surface of the airtight container which rotates. The compression element is provided with an annular hollow cylinder and an upper bearing, an intermediate partition plate, and a lower bearing that support the rotating shaft, and the upper and lower end surfaces of the cylinder are sandwiched between the cylinders. A roller that engages with an eccentric shaft that is also a part of the rotating shaft is provided, and is configured to be eccentrically rotated in the cylinder by driving from the rotor of the electric element, thereby compressing the refrigerant.

また密閉容器内の底部にはオイル溜められており、回転軸の下端に取り付けられたオイルポンプ（給油手段）により密閉容器内の底部に溜められたオイルを吸い上げ、圧縮要素の摺動部に供給され潤滑とシールをしている。一方、圧縮要素より圧縮され吐出された冷媒は、回転子と固定子の隙間および固定子の外周に設けられた密閉容器内壁との隙間を形成する切欠を通って密閉容器の上部に設けられた吐出管から外部に吐出される。
特開平５−９９１７２号公報 Oil is stored in the bottom of the sealed container, and oil stored in the bottom of the sealed container is sucked up by an oil pump (oil supply means) attached to the lower end of the rotating shaft and supplied to the sliding part of the compression element. It is lubricated and sealed. On the other hand, the refrigerant compressed and discharged by the compression element is provided in the upper part of the hermetic container through a notch that forms a gap between the rotor and the stator and an inner wall of the hermetic container provided on the outer periphery of the stator. It is discharged outside from the discharge pipe.
JP-A-5-99172

しかしながら、前記従来の密閉型圧縮機では、圧縮要素で圧縮された冷媒ガス中にオイルが溶け込んでおり、冷媒ガスと共に当該オイルも回転子と固定子の隙間および固定子の外周に設けられた密閉容器内壁との隙間を形成する切欠を通って、オイルが分離されることなく、密閉容器の上部に設けられた吐出管から外部に吐出されてしまい、オイル吐出量が増加してしまうという問題があった。 However, in the conventional hermetic compressor, oil is dissolved in the refrigerant gas compressed by the compression element, and the oil is also provided in the gap between the rotor and the stator and the outer periphery of the stator together with the refrigerant gas. There is a problem that oil is discharged outside from the discharge pipe provided at the upper part of the closed container through the notch that forms a gap with the inner wall of the container, and the oil discharge amount increases. there were.

前記従来の課題を解決する為に、本発明の密閉型圧縮機は、密閉容器内に電動要素と圧縮要素とを備えて成る、密閉型圧縮機において、中心部を中空としたドーナツ状の形状をした遮蔽メッシュ板を、前記密閉容器の上部、電動要素の上方に設け、遮蔽板の中空部径Ａ寸法と回転子外径Ｂ寸法の関係をＡ＜Ｂに形成したものである。 In order to solve the above-described conventional problems, a hermetic compressor according to the present invention includes an electric element and a compression element in a hermetic container. The hermetic compressor has a donut-like shape with a hollow center. The shield mesh plate is provided above the sealed container and above the electric element, and the relationship between the hollow portion diameter A dimension of the shield plate and the rotor outer diameter B dimension is formed as A <B.

本発明の密閉型圧縮機は、前記構成を有し、冷媒ガスを密閉容器に設けられた吐出管から吐出する際に、ドーナツ状の形状をした遮蔽メッシュ板により、冷媒ガス中に含まれるオイルを分離し、冷媒ガスのみを密閉容器から吐出させることで、オイル吐出量の低減が図れる。 The hermetic compressor of the present invention has the above-described configuration, and the oil contained in the refrigerant gas by the donut-shaped shielding mesh plate when the refrigerant gas is discharged from the discharge pipe provided in the hermetic container. The oil discharge amount can be reduced by discharging the refrigerant gas and discharging only the refrigerant gas from the sealed container.

以下、本発明の実施の形態について、図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施の形態１）
図１は、本発明の実施の形態１における密閉型圧縮機の縦断面図、図２は、本発明の実施の形態１における遮蔽メッシュ板１１のみを密閉型圧縮機上方から見た図である。 (Embodiment 1)
FIG. 1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention, and FIG. 2 is a view of only the shielding mesh plate 11 according to the first embodiment of the present invention as viewed from above the hermetic compressor. .

図１、図２に示すように、密閉容器１内の上部に電動要素２を、下部に圧縮要素３を配置しており、電動要素２は圧縮要素３を構成する回転軸４に連結され回転する回転子２ａと、この回転子２ａを回転させる密閉容器１の内周面に固定された固定子２ｂとで構成される。圧縮要素３には、環状で中空のシリンダ５と、このシリンダ５の上下端面を挟み込んで閉塞すると共に、回転軸４を支承する上軸受６、下軸受７とが配置され、閉塞されたシリンダ５内には回転軸４の一部でもある偏心軸４ａに係合するローラ８が設けられ、電動要素２の回転子２ａからの駆動によりシリンダ５内を偏心して回転し、冷媒が圧縮される構造となっている。 As shown in FIGS. 1 and 2, the electric element 2 is arranged in the upper part of the sealed container 1 and the compression element 3 is arranged in the lower part. The electric element 2 is connected to a rotating shaft 4 constituting the compression element 3 and rotates. And a stator 2b fixed to the inner peripheral surface of the hermetic container 1 for rotating the rotor 2a. The compression element 3 is provided with an annular hollow cylinder 5 and an upper bearing 6 and a lower bearing 7 that support the rotating shaft 4 while the upper and lower end surfaces of the cylinder 5 are sandwiched and closed. Inside, a roller 8 that engages with an eccentric shaft 4a that is also a part of the rotating shaft 4 is provided, and the inside of the cylinder 5 rotates eccentrically by driving from the rotor 2a of the electric element 2, and the refrigerant is compressed. It has become.

また密閉容器１内の底部にはオイル９溜められており、回転軸４の下端に取り付けられたオイルポンプ（給油手段）により密閉容器１内の底部に溜められたオイル９を吸い上げ、圧縮要素３の摺動部に供給され潤滑とシールをしている。一方、電動要素２には、圧縮要素３より圧縮され吐出された冷媒を、密閉容器１から外部へ吐出させるために設けられた吐出管１０まで導く、回転子２ａと固定子２ｂの隙間２ｃおよび固定子２ｂの外周に設けられた密閉容器１内壁との隙間を形成する切欠２ｄの通路を備え、密閉容器１内の上部、電動要素２の上方には中心部を中空としたドーナツ状の形状をした遮蔽メッシュ板１１を設け、遮蔽メッシュ板１１は中空部径Ａ寸法と回転子外径Ｂ寸法の関係をＡ＜Ｂとして構成している。 Oil 9 is stored at the bottom of the sealed container 1, and the oil 9 stored at the bottom of the sealed container 1 is sucked up by an oil pump (oil supply means) attached to the lower end of the rotating shaft 4 to compress the compression element 3. It is supplied to the sliding part and lubricates and seals. On the other hand, in the electric element 2, the gap 2c between the rotor 2a and the stator 2b, which guides the refrigerant compressed and discharged from the compression element 3 to the discharge pipe 10 provided for discharging from the sealed container 1 to the outside, A donut-like shape having a notch 2d passage that forms a gap with the inner wall of the sealed container 1 provided on the outer periphery of the stator 2b, with a hollow center at the top of the sealed container 1 and above the electric element 2 The shielding mesh plate 11 is provided, and the shielding mesh plate 11 is configured such that the relationship between the hollow portion diameter A dimension and the rotor outer diameter B dimension is A <B.

かかる構成によれば、冷媒ガスが密閉容器１に設けられた吐出管１０から吐出する際に、回転子２ａと固定子２ｂの隙間２ｃおよび固定子２ｂの外周に設けられた密閉容器１内壁との隙間を形成する切欠２ｄの２通路を通り、２通路を通った冷媒ガス共にドーナツ状の形状をした遮蔽メッシュ板１１にぶつけることができ、冷媒ガス中に含まれる粘性の高いオイル９のみ遮蔽メッシュ板１１に付着するかたちで分離され、冷媒ガスのみが密閉容器１から吐出されることで、オイル吐出量の低減効果を得ることができる。また遮蔽メッシュ板１１が単なる板状でなく、メッシュ状になっているため、冷媒ガスの流路抵抗の増加も抑えることができる。 According to this configuration, when the refrigerant gas is discharged from the discharge pipe 10 provided in the sealed container 1, the gap 2c between the rotor 2a and the stator 2b and the inner wall of the sealed container 1 provided on the outer periphery of the stator 2b Passing through the two passages of the notch 2d forming the gap, the refrigerant gas passing through the two passages can hit the shielding mesh plate 11 having a donut shape, and only the highly viscous oil 9 contained in the refrigerant gas is shielded. Since the refrigerant is separated from the mesh plate 11 and only the refrigerant gas is discharged from the sealed container 1, an effect of reducing the oil discharge amount can be obtained. Further, since the shielding mesh plate 11 is not a simple plate shape but a mesh shape, an increase in the flow resistance of the refrigerant gas can be suppressed.

なお前記、実施の形態の図１の遮蔽板１１の中空部の形状は円形のタイプのものであるが、これに限定されるものではなく、多角形状の形状においても同様な作用効果を得ることができる。 In addition, although the shape of the hollow part of the shielding board 11 of FIG. 1 of the said embodiment is a circular type thing, it is not limited to this, The same effect is acquired also in a polygonal shape. Can do.

本発明の密閉型圧縮機は、圧縮形態に関わらず、あらゆる密閉型圧縮機に適応が可能である。 The hermetic compressor of the present invention can be applied to any hermetic compressor regardless of the compression mode.

本発明の実施の形態１における密閉型圧縮機の縦断面図1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention. 本発明の実施の形態１における遮蔽メッシュ板を示す図The figure which shows the shielding mesh board in Embodiment 1 of this invention

Explanation of symbols

１密閉容器
２電動要素
２ａ回転子
２ｂ固定子
２ｃ隙間欠
２ｄ切欠
３圧縮要素
４回転軸
４ａ偏心軸
５シリンダ
６上軸受
７下軸受
８ローラ
９オイル
１０吐出管
１１遮蔽メッシュ板 1 Airtight container
2 Electric element 2a Rotor 2b Stator 2c Clearance notch 2d Notch 3 Compression element 4 Rotating shaft 4a Eccentric shaft
5 Cylinder 6 Upper bearing 7 Lower bearing 8 Roller 9 Oil 10 Discharge pipe 11 Shielding mesh plate

Claims

In a hermetic compressor including an electric element and a compression element in a hermetic container, a doughnut-shaped shielding mesh plate having a hollow center is disposed above the electric element in the hermetic container. A sealed compressor characterized in that the relationship between the hollow portion diameter A dimension of the shielding plate and the rotor outer diameter B dimension is A <B.