JP4715281B2 - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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Publication number
JP4715281B2
JP4715281B2 JP2005126057A JP2005126057A JP4715281B2 JP 4715281 B2 JP4715281 B2 JP 4715281B2 JP 2005126057 A JP2005126057 A JP 2005126057A JP 2005126057 A JP2005126057 A JP 2005126057A JP 4715281 B2 JP4715281 B2 JP 4715281B2
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cylinder
compression mechanism
face
piston
hermetic compressor
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JP2006300013A (en
Inventor
充 栗本
啓 椎崎
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、冷凍機、空調機、乾燥機などに使用される密閉型圧縮機の性能改善に関するものである。   The present invention relates to performance improvement of a hermetic compressor used in a refrigerator, an air conditioner, a dryer, and the like.

従来、この種の密閉型圧縮機は、上シリンダを溶接により固定し、この上シリンダに下シリンダを固定して製造されている。一般に、密閉型圧縮機のシリンダとピストンとの隙間はあまり大きくすると冷媒が漏れてC.O.Pが低下する。しかし、上部シリンダは上記のように前記密閉容器内に固定する際に熱応力を受けて変形するので、シリンダとピストンとの隙間を小さくすることができず、この変形を考慮して精度を落として製作されていたため、C.O.Pが悪かった。これを改善するために、熱応力の影響を受けない下側
の隙間のみを小さくしC.O.Pを向上している(例えば、特許文献1参照)。
Conventionally, this type of hermetic compressor is manufactured by fixing an upper cylinder by welding and fixing a lower cylinder to the upper cylinder. Generally, if the clearance between the cylinder and the piston of the hermetic compressor is too large, the refrigerant leaks and C.I. O. P decreases. However, since the upper cylinder is deformed due to thermal stress when it is fixed in the closed container as described above, the gap between the cylinder and the piston cannot be reduced, and the accuracy is reduced in consideration of this deformation. C. O. P was bad. In order to improve this, only the lower gap that is not affected by thermal stress is reduced. O. P is improved (for example, refer to Patent Document 1).

図4は、特許文献1に記載された従来の密閉型圧縮機を示すものである。図4に示すように、電動機1と電動機の回転力をクランク軸2によって駆動する複数の圧縮機構部3を備え、前記圧縮機構部3で冷媒ガスを圧縮して、密閉容器4の内に吐出した後、密閉容器4の外に吐出する。また、前記圧縮機構部3は複数のシリンダ5とシリンダ内に回転するピストン6と、シリンダ5内を分けるベーン7と、クランク軸2を支える上・下軸受8・9より構成され、前記圧縮機構部3は前記密閉容器4に上側のシリンダにより溶接固定されている。また、上側のシリンダとピストンとの軸方向隙間を、下側のシリンダとピストンの軸方向隙間より大きくしている。
特開平10−103223号公報
FIG. 4 shows a conventional hermetic compressor described in Patent Document 1. In FIG. As shown in FIG. 4 , an electric motor 1 and a plurality of compression mechanisms 3 that drive the rotational force of the electric motor by a crankshaft 2 are provided, and refrigerant gas is compressed by the compression mechanisms 3 and discharged into a sealed container 4. After that, it is discharged out of the sealed container 4. The compression mechanism section 3 includes a plurality of cylinders 5, pistons 6 that rotate into the cylinders, vanes 7 that divide the cylinders 5, and upper and lower bearings 8 and 9 that support the crankshaft 2. The portion 3 is fixed to the closed container 4 by welding with an upper cylinder. Further, the axial gap between the upper cylinder and the piston is made larger than the axial gap between the lower cylinder and the piston.
JP-A-10-103223

しかしながら、従来の構成では、運転周波数可変な2シリンダインバータロータリ圧縮機において、60Hzをこえて高速運転する場合、密閉容器内にある潤滑油のレベルが低下するため、上シリンダが潤滑油につからない状態となり、潤滑油によるシールが形成されにくくなり、上シリンダ端面を含む平面と上ピストン端面とで形成される軸方向隙間から漏れが生じ、C.O.Pが低下するという課題を有していた。 However, in the conventional configuration, in a two-cylinder inverter rotary compressor with a variable operating frequency, when operating at a high speed exceeding 60 Hz, the level of the lubricating oil in the hermetic container decreases, so the upper cylinder is connected to the lubricating oil. C., a seal with lubricating oil is difficult to form, and leakage occurs from the axial gap formed by the plane including the upper cylinder end surface and the upper piston end surface . O. It had the subject that P fell.

本発明は、前記従来の課題を解決するもので、高いC.O.Pを有した密閉型圧縮機を提供することを目的とする。   The present invention solves the above-mentioned conventional problems. O. An object of the present invention is to provide a hermetic compressor having P.

前記従来の課題を解決するために、本発明の密閉型圧縮機は、密閉容器に上軸受で溶接により固定することで、上シリンダが熱応力により変形することを防止し、潤滑油レベルの低下による、上シリンダと上ピストンとの隙間からの漏れを低減するために、下ピストン端面と下シリンダ端面を含む平面とで形成される軸方向隙間より上シリンダ端面を含む平面と上ピストン端面とで形成される軸方向隙間を小さくたものである。 In order to solve the above-mentioned conventional problems, the hermetic compressor of the present invention is fixed to the hermetic container by welding with an upper bearing, thereby preventing the upper cylinder from being deformed due to thermal stress and lowering the lubricating oil level. In order to reduce leakage from the gap between the upper cylinder and the upper piston, the plane including the upper cylinder end surface and the upper piston end surface are more than the axial clearance formed by the lower piston end surface and the plane including the lower cylinder end surface. The axial gap to be formed is reduced.

これによって高速運転した場合に、潤滑油のレベルが低下し、上側のシリンダが潤滑油につからない状態となっても、C.O.Pの低下を少なくすることができる。   As a result, when operating at high speed, the level of the lubricating oil decreases and the upper cylinder is not in contact with the lubricating oil. O. The decrease in P can be reduced.

本発明の密閉型圧縮機は、C.O.Pの向上を達成することができる。   The hermetic compressor of the present invention includes C.I. O. An improvement in P can be achieved.

第1の発明は、密閉容器内に、電動機と圧縮機構部を備え、前記電動機の回転力をクランク軸によって圧縮機構部に伝達し、圧縮機構部で冷媒ガスを圧縮して密閉容器内に吐出した後、密閉容器外に吐出する、また、前記圧縮機構部は密閉容器内の潤滑油につかっており、潤滑油により、潤滑とシールをされている運転周波数可変なインバータロータリ圧縮機において、前記圧縮機構部は、前記電動機側から、密閉容器に溶接により固定された上軸受に、上シリンダ、仕切り板、下シリンダ、下軸受の各要素を重ね合わせた2つのシリンダで構成されているものとし、各シリンダ内には上ピストン、下ピストンがそれぞれ収納され、上下の各シリンダの圧縮室と吸入室ベーンにより仕切られており、上ピストン端面と上シリンダ端面を含む平面で形成される軸方向隙間、下ピストン端面と下シリンダ端面を含む平面とで形成される軸方向隙間より小さくすることにより、C.O.Pの向上を達成することができる。 A first invention includes an electric motor and a compression mechanism in a sealed container, transmits the rotational force of the electric motor to the compression mechanism by a crankshaft, compresses the refrigerant gas by the compression mechanism, and discharges the gas into the sealed container. In the inverter rotary compressor with variable operating frequency, which is discharged out of the sealed container, and the compression mechanism is used in the lubricating oil in the sealed container and is lubricated and sealed with the lubricating oil. The compression mechanism section is composed of two cylinders in which the upper cylinder, the partition plate, the lower cylinder, and the lower bearing are superposed on the upper bearing fixed to the sealed container by welding from the electric motor side. , the upper piston in each cylinder, the lower piston is housed, respectively, and the suction chamber and the compression chamber of the upper and lower of each cylinder is partitioned by the vanes, including the upper piston end face and the upper cylinder end face An axial gap formed at the surface, by reducing the axial direction gap formed by the plane including the lower piston end face and the lower cylinder end faces, C. O. An improvement in P can be achieved.

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。なお、この実施の
形態によって本発明が限定されるものではない。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(実施の形態1)
図1は、本発明第1の実施の形態における密閉型圧縮機の断面図、図2は上シリンダ側の圧縮機構部断面拡大図、図3は下シリンダ側の圧縮機構部断面拡大図である。
(Embodiment 1)
FIG. 1 is a sectional view of a hermetic compressor according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of a compression mechanism section on the upper cylinder side, and FIG. 3 is an enlarged sectional view of a compression mechanism section on the lower cylinder side. .

図1において、密閉容器4に圧縮機構部3を上シリンダ51にて溶接固定し上シリンダの歪と防ぐことで、上シリンダ51の端面を含む平面と上ピストン61の端面で形成される軸方向隙間101を、下シリンダ52の端面を含む平面と下ピストン62の端面で形成される軸方向隙間102より小さくしたものであり、高速運転時のオイルレベルが低下する場合でも、オイルシールの効果が少なくなる上側の圧縮機構部のモレを低減でき、性能の低下を防ぐことが出来る。 In FIG. 1, the compression mechanism 3 is welded and fixed to the hermetic container 4 by the upper cylinder 51 to prevent distortion of the upper cylinder, thereby forming an axial direction formed by a plane including the end face of the upper cylinder 51 and the end face of the upper piston 61. The gap 101 is smaller than the axial gap 102 formed by the plane including the end face of the lower cylinder 52 and the end face of the lower piston 62. Even when the oil level during high speed operation decreases, the effect of the oil seal is achieved. It is possible to reduce the leakage of the upper compression mechanism, which is reduced, and to prevent the performance from being lowered.

以上のように、本発明にかかる密閉型圧縮機は、簡単な方法で、C.O.Pの向上が可能となるので、ヒートポンプを用いた用途に適用できる。   As described above, the hermetic compressor according to the present invention can be obtained by a simple method using C.I. O. Since P can be improved, it can be applied to a use using a heat pump.

本発明の実施の形態1における密閉型圧縮機の断面図Sectional drawing of the hermetic compressor in Embodiment 1 of this invention 上シリンダ側圧縮機構部の断面拡大図Cross section enlarged view of upper cylinder side compression mechanism 下シリンダ側圧縮機構部の断面拡大図Cross-sectional enlarged view of lower cylinder side compression mechanism 従来の密閉型圧縮機の断面図Cross section of a conventional hermetic compressor

1 電動機
2 クランク軸
3 圧縮機構部
4 密閉容器
51 上シリンダ
52 下シリンダ
61 上ピストン
62 下ピストン
7 ベーン
8 上軸受
9 下軸受
101 軸方向隙間
102 軸方向隙間
DESCRIPTION OF SYMBOLS 1 Electric motor 2 Crankshaft 3 Compression mechanism part 4 Sealed container 51 Upper cylinder 52 Lower cylinder 61 Upper piston 62 Lower piston 7 Vane 8 Upper bearing 9 Lower bearing
101 Axial clearance
102 Axial clearance

Claims (1)

密閉容器内に、電動機と圧縮機構部を備え、前記電動機の回転力をクランク軸によって圧縮機構部に伝達し、圧縮機構部で冷媒ガスを圧縮して密閉容器内に吐出した後、密閉容器外に吐出する、また、前記圧縮機構部は密閉容器内の潤滑油につかっており、潤滑油により、潤滑とシールをされている運転周波数可変なインバータロータリ圧縮機において、前記圧縮機構部は、前記電動機側から、密閉容器に溶接により固定された上軸受に、上シリンダ、仕切り板、下シリンダ、下軸受の各要素を重ね合わせた、2シリンダで構成され、各シリンダ内には上ピストン、下ピストンがそれぞれ収納され、上下の各シリンダの圧縮室と吸入室ベーンにより仕切られており、上ピストン端面と上シリンダ端面を含む平面で形成される軸方向隙間を、下ピストン端面と下シリンダ端面を含む平面で形成される軸方向隙間より小さくしたことを特徴とする密閉型圧縮機。 An airtight container is provided with an electric motor and a compression mechanism, and the rotational force of the electric motor is transmitted to the compression mechanism by the crankshaft, and the refrigerant gas is compressed by the compression mechanism and discharged into the airtight container. In the inverter rotary compressor with variable operating frequency that is lubricated and sealed with the lubricating oil, the compression mechanism is The upper cylinder, partition plate, lower cylinder, and lower bearing are superimposed on the upper bearing fixed by welding to the sealed container from the motor side. The cylinder consists of two cylinders. piston is housed, respectively, the suction chamber and the compression chamber and below each cylinder is partitioned by the vanes, an axial gap formed by a plane including the upper piston end face and the upper cylinder end face, Hermetic compressor, characterized in that the smaller than the axial gap formed by a plane including the piston end face and the lower cylinder end face.
JP2005126057A 2005-04-25 2005-04-25 Hermetic compressor Expired - Fee Related JP4715281B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008151018A (en) * 2006-12-18 2008-07-03 Mitsubishi Electric Corp Rotary type two-stage compressor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6338691A (en) * 1986-08-04 1988-02-19 Mitsubishi Electric Corp Multi-cylinder rotary compressor
JPS63186989U (en) * 1987-05-21 1988-11-30
JPH03246392A (en) * 1990-02-23 1991-11-01 Sanyo Electric Co Ltd Multiple cylinder rotary compressor
JPH0481592A (en) * 1990-07-20 1992-03-16 Hitachi Ltd Rotary compressor
JP2933772B2 (en) * 1991-12-16 1999-08-16 株式会社日立製作所 2-cylinder rotary compressor
JPH0681786A (en) * 1992-09-04 1994-03-22 Toshiba Corp Two-stage compression type rotary compressor
JPH06307364A (en) * 1993-04-21 1994-11-01 Matsushita Electric Ind Co Ltd Two cylinder rotary compressor
JP3475024B2 (en) * 1996-09-27 2003-12-08 三洋電機株式会社 Hermetic compressor

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