JP2000145634A - Hermetic electrically driven compressor - Google Patents
Hermetic electrically driven compressorInfo
- Publication number
- JP2000145634A JP2000145634A JP10318791A JP31879198A JP2000145634A JP 2000145634 A JP2000145634 A JP 2000145634A JP 10318791 A JP10318791 A JP 10318791A JP 31879198 A JP31879198 A JP 31879198A JP 2000145634 A JP2000145634 A JP 2000145634A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- closed
- discharge pipe
- silencer
- electric compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Compressor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は密閉形電動圧縮機に
係わり、たとえば冷蔵庫などの冷凍装置に組み込まれ、
密閉形電動圧縮機の運転中の騒音、または冷凍装置側の
配管の振動を防止するのに好適な密閉形電動圧縮機に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor, and is incorporated in a refrigerating device such as a refrigerator.
The present invention relates to a hermetic electric compressor suitable for preventing noise during operation of the hermetic electric compressor or vibration of piping on a refrigeration apparatus side.
【０００２】[0002]
【従来の技術】密閉形電動圧縮機は、回転子の回転運動
をスライダによりピストンの往復運動に変換しているた
め、もしくはピストンの吐出工程での負荷変化が加わる
ために圧縮機構部、電動機部が振動し、この振動が密閉
容器へ伝わることにより密閉容器が振動し騒音を発生す
る。2. Description of the Related Art In a hermetic electric compressor, a compression mechanism section and an electric motor section are used because a rotary motion of a rotor is converted into a reciprocating motion of a piston by a slider or a load change is applied in a discharge process of the piston. Vibrates, and the vibration is transmitted to the closed container, whereby the closed container vibrates and generates noise.
【０００３】また、シリンダから吐出された冷媒は、シ
リンダ上死点側に設けられた吐出サイレンサを通過する
が、吸い込みと吐出が間欠的に行われるため吐出脈動が
発生する。この吐出脈動が騒音を発生させ、また冷凍装
置側の配管を振動させる原因となる。吐出脈動を低減す
るためには吐出サイレンサを共鳴形、多段膨張形等が用
いられているが、吐出サイレンサの容積を大きくするに
は限度があり、十分に効果のある吐出サイレンサは設け
られない。[0003] The refrigerant discharged from the cylinder passes through a discharge silencer provided on the cylinder top dead center side, but discharge pulsation occurs because suction and discharge are intermittently performed. This discharge pulsation generates noise and causes the piping on the refrigeration apparatus side to vibrate. In order to reduce the discharge pulsation, a discharge silencer of a resonance type, a multi-stage expansion type, or the like is used. However, there is a limit to increasing the volume of the discharge silencer, and a discharge silencer that is sufficiently effective cannot be provided.
【０００４】すなわち、吐出サイレンサについてより詳
しく説明すれば、密閉容器内に取り付けられた吐出管の
吐出脈動は、たとえば図６の実線に示す如く、６３０Ｈ
ｚから１６００Ｈｚの範囲の吐出脈動と２５００から５
０００Ｈｚの範囲の吐出脈動は比較的低く効果がある
が、４００Ｈｚ、５００Ｈｚ及び２０００Ｈｚの吐出脈
動には効果はなく、そのため４００Ｈｚ、５００Ｈｚ、
２０００Ｈｚの騒音の発生、冷凍装置側の配管の振動を
誘発していた。More specifically, the discharge silencer will be described in more detail. The discharge pulsation of the discharge pipe mounted in the closed container is, for example, 630H as shown by a solid line in FIG.
Discharge pulsation in the range from z to 1600 Hz and 2500 to 5
Discharge pulsations in the range of 000 Hz are relatively low, but have no effect on discharge pulsations of 400 Hz, 500 Hz, and 2000 Hz, and therefore 400 Hz, 500 Hz,
The generation of 2000 Hz noise and the vibration of the piping on the refrigeration apparatus side were induced.
【０００５】また、たとえば、実公昭４２−３５７３号
公告記載の密閉形電動圧縮機のように、吐出管をＵ字形
に曲げて曲げ部の内側に切欠穴を設け、このＵ字曲げ部
の切欠穴をカバー板で被覆しサイレンサを形成して騒音
低減を図るものがある。Further, for example, as in a hermetic electric compressor disclosed in Japanese Utility Model Publication No. 42-3573, a discharge pipe is bent into a U-shape to form a notch hole inside a bent portion, and the notch in the U-shaped bent portion is provided. In some cases, the holes are covered with a cover plate to form a silencer to reduce noise.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記実公昭４
２−３５７３号公報記載の密閉形電動圧縮機では、吐出
管のＵ字曲げ部の切欠穴をカバー板で被覆して接合し、
吐出サイレンサを設けているため、接合部の剛性が増し
て吐出管の柔軟性が失われ、このため圧縮機構部、電動
機部の振動が密閉容器へ容易に伝わり密閉容器を加振さ
せ騒音を発生させていた。[Problems to be solved by the invention]
In the hermetic electric compressor described in JP-A-2-3573, the cutout hole of the U-shaped bent portion of the discharge pipe is covered with a cover plate and joined.
Since the discharge silencer is provided, the rigidity of the joint increases and the flexibility of the discharge pipe is lost, so the vibrations of the compression mechanism and the electric motor are easily transmitted to the closed container, causing the closed container to vibrate and generate noise. I was letting it.
【０００７】本発明は、吐出管の柔軟性を失うことなく
圧縮機構部、電動機部の振動が密閉容器へ伝わることを
防止し、吐出脈動を低減し低騒音の密閉形電動圧縮機を
提供することを目的とする。The present invention provides a hermetic electric compressor that prevents vibration of a compression mechanism portion and an electric motor portion from being transmitted to a closed container without losing the flexibility of a discharge pipe, reduces discharge pulsation, and has low noise. The purpose is to:
【０００８】[0008]
【課題を解決するための手段】上記目的は、電動機と圧
縮機構部とを密閉容器に収納し、ピストンの往復運動に
よりガス冷媒の吸い込みと吐出とを行い、圧縮ガス冷媒
を吐出管へ吐出する密閉形電動圧縮機において、前記吐
出管に開放端が接続され他端が閉鎖する閉管形消音器を
設ける、ことによって達成される。An object of the present invention is to accommodate a motor and a compression mechanism in a closed container, to suck and discharge gas refrigerant by reciprocating pistons, and to discharge compressed gas refrigerant to a discharge pipe. This is achieved by providing a closed-type silencer having an open end connected to the discharge pipe and the other end closed in the hermetic electric compressor.
【０００９】また上記目的は、電動機と圧縮機構部とを
密閉容器に収納し、これら電動機と圧縮機構部とをクラ
ンクシャフト及びクランクピンを介して連結し、前記圧
縮機構部はクランクピンの回転運動を往復運動に変換す
るスライダと、このスライダによりシリンダ内で往復運
動を繰り返すピストンと、このピストンの往復運動によ
りガス冷媒の吸い込みと吐出とを行い、圧縮ガス冷媒を
吐出管へ吐出する密閉形電動圧縮機において、前記シリ
ンダの上死点側に吐出サイレンサーを設け、この吐出サ
イレンサーに前記吐出管を接続し、吐出管に開放端が接
続され他端が閉鎖する閉管形消音器を設ける、ことによ
って達成される。Another object of the present invention is to store an electric motor and a compression mechanism in an airtight container and connect the motor and the compression mechanism via a crankshaft and a crankpin. And a piston that repeats reciprocating motion in the cylinder by the slider, and a suction and discharge of the gas refrigerant by the reciprocating motion of the piston, and a sealed electric motor that discharges the compressed gas refrigerant to a discharge pipe. In the compressor, a discharge silencer is provided on the top dead center side of the cylinder, the discharge pipe is connected to the discharge silencer, and a closed pipe type silencer is connected to the discharge pipe, the open end of which is connected to the open end and the other end of which is closed. Achieved.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施例を図面によ
り説明する。図１は、本発明の第１の実施例に係る密閉
形電動圧縮機の縦断面図、図２は図１に示す密閉形電動
圧縮機の平面図、図３は吐出管に閉管形消音器を取り付
けた部分の要部拡大図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a hermetic electric compressor according to a first embodiment of the present invention, FIG. 2 is a plan view of the hermetic electric compressor shown in FIG. 1, and FIG. It is a principal part enlarged view of the part attached.
【００１１】図において、密閉容器１には、電動機部２
と圧縮機構部３とが収納され、これら電動機部２と圧縮
機構部３とはばね４を介して密閉容器１に支持され、か
つ、電動機部２と圧縮機構部３とはクランクシャフト５
を介して連結されている。電動機部２は固定子２ａと回
転子２ｂとから構成され、この回転子２ｂには電動機部
２の回転運動を前記圧縮機構部３に伝達するためのクラ
ンクシャフト５が嵌入され、このクランクシャフト５に
はクランクシャフト５と偏心しているクランクピン５ａ
が設けられている。また、クランクシャフト５の下部に
はポンプ５ｂが設けられ、このポンプ５ｂによって密閉
容器１の底部に貯留している潤滑油６をクランクピン５
ａの上端より飛散することにより、所要の摺動部へ潤滑
油６を給油する構成になっている。In FIG. 1, a closed casing 1 includes a motor section 2.
And the compression mechanism 3 are accommodated. The electric motor 2 and the compression mechanism 3 are supported by the closed container 1 via a spring 4, and the electric motor 2 and the compression mechanism 3 are connected to the crankshaft 5.
Are connected via The electric motor unit 2 includes a stator 2a and a rotor 2b. A crankshaft 5 for transmitting the rotational motion of the electric motor unit 2 to the compression mechanism unit 3 is fitted into the rotor 2b. Has a crankpin 5a eccentric with the crankshaft 5
Is provided. Further, a pump 5b is provided below the crankshaft 5, and the pump 5b removes the lubricating oil 6 stored at the bottom of the closed container 1 to the crankpin 5b.
The lubricating oil 6 is supplied to a required sliding portion by scattering from the upper end of a.
【００１２】前記圧縮機構部３は、クランクピン５ａの
回転運動を往復運動に変換するためのスライダ７と、こ
のスライダ７によりシリンダ８内で往復運動を繰り返す
ピストン９とを備えている。また、前記ポンプ５ｂは、
ピストン９がシリンダ８内を１往復することにより、す
なわち、回転子３ｂが１回転することにより１回の冷媒
の吸い込みと吐出とを行う構成になっている。１０は吸
い込み側サイレンサ、１１は吐出側サイレンサで、いず
れも前記シリンダ８の上死点側に設けられている。この
吸い込み側サイレンサ１０と前記シリンダ８とはカバー
１２によって被覆され、また、シリンダ８と吐出側サイ
レンサ１１とはカバー１３によって被覆され、それぞれ
吸い込み側サイレンサ１０とシリンダ８とを接続する流
路１２ａ，シリンダ８と吐出側サイレンサ１１とを接続
する１３ａを形成している。The compression mechanism 3 has a slider 7 for converting the rotational movement of the crankpin 5a into a reciprocating movement, and a piston 9 which repeats a reciprocating movement in a cylinder 8 by the slider 7. The pump 5b is
When the piston 9 makes one reciprocation in the cylinder 8, that is, when the rotor 3b makes one rotation, one suction and one discharge of the refrigerant are performed. Reference numeral 10 denotes a suction-side silencer, and reference numeral 11 denotes a discharge-side silencer. The suction-side silencer 10 and the cylinder 8 are covered by a cover 12, and the cylinder 8 and the discharge-side silencer 11 are covered by a cover 13. The flow paths 12a and 12a connect the suction-side silencer 10 and the cylinder 8, respectively. 13a for connecting the cylinder 8 and the discharge-side silencer 11 is formed.
【００１３】１４は吐出管で、一端は前記吐出側サイレ
ンサ１１に接続され、他端は吐出管１５に接続されてい
る。この吐出管１５は前記密閉容器１を貫通して溶接な
どで固定されている。１６は閉管形消音器（以下、サイ
ドブランチという）で、一端が開放され、他端は閉鎖さ
れているが、前記吐出管１４には開放端が溶接等で接続
され、吐出管１４内と連通している。この吐出管１４と
サイドブランチ１６との接合は溶接等によっても限られ
た小範囲であるので、吐出管１４は柔軟性を失うことは
ない。サイドブランチ１６を吐出管１４に取り付ける位
置は、容器１と吐出管１５との間の空間的に余裕のある
部分に取り付ければよい。また、サイドブランチ１６の
取り付け角度は水平か、もしくは斜め上方になるように
角度をもって取り付けることによりサイドブランチ１６
内に潤滑油が溜ることがなくなり、したがって十分に吐
出脈動低減の効果を発揮できる。A discharge pipe 14 has one end connected to the discharge-side silencer 11 and the other end connected to a discharge pipe 15. The discharge pipe 15 penetrates the closed container 1 and is fixed by welding or the like. Reference numeral 16 denotes a closed pipe type silencer (hereinafter referred to as a side branch), one end of which is open and the other end thereof is closed. The open end is connected to the discharge pipe 14 by welding or the like, and communicates with the inside of the discharge pipe 14. are doing. Since the joint between the discharge pipe 14 and the side branch 16 is limited to a small range by welding or the like, the discharge pipe 14 does not lose its flexibility. The position where the side branch 16 is attached to the discharge pipe 14 may be attached to a space between the container 1 and the discharge pipe 15 where there is a sufficient space. The side branch 16 can be mounted at an angle so as to be horizontal or obliquely upward.
Lubricating oil does not accumulate in the inside, so that the effect of reducing discharge pulsation can be sufficiently exhibited.
【００１４】すなわち、密閉形電動圧縮機は電動機部２
の回転により圧縮機構部３においてガス冷媒を吸い込
み、吐出を繰り返しているが、クランクピン５ａ上端よ
り潤滑油６を飛散しているために冷媒を吸い込む際、潤
滑油６も微量ではあるが同時に吸い込まれる。このた
め、冷媒と潤滑油６との混合物はシリンダ９より吐出さ
れ、吐出サイレンサ１１から吐出管１４へ流れ、同時に
潤滑油６も吐出サイレンサ１１から吐出管１４へ流れ
る。この時、サイドブランチ１６が下方に傾斜して取り
付けられていると、吐出サイレンサ１１から吐出管１４
へ流れた潤滑油６がサイドブランチ１６内に溜り、サイ
ドブランチ１６の機能を果たさなくなってしまう。しか
し、サイドブランチ１６を水平もしくは上方へ傾斜させ
て取り付けた場合、潤滑油６は溜ることがなくなるので
サイドブランチ１７もその機能を損なうこともない。That is, the hermetic electric compressor is a motor unit 2
The gas refrigerant is sucked and discharged repeatedly in the compression mechanism section 3 by the rotation of the lubricating oil 6, but when the lubricating oil 6 is scattered from the upper end of the crank pin 5a, the lubricating oil 6 is also sucked in at a small amount at the same time. It is. Therefore, the mixture of the refrigerant and the lubricating oil 6 is discharged from the cylinder 9 and flows from the discharge silencer 11 to the discharge pipe 14, and at the same time, the lubricating oil 6 also flows from the discharge silencer 11 to the discharge pipe 14. At this time, if the side branch 16 is attached to be inclined downward, the discharge silencer 11
The lubricating oil 6 that has flowed into the side branch 16 accumulates in the side branch 16, and does not fulfill the function of the side branch 16. However, when the side branch 16 is attached horizontally or inclined upward, the lubricating oil 6 does not accumulate, so that the side branch 17 does not impair its function.
【００１５】ここで、容器１すなわち吐出管１４の共鳴
周波数をｆ、この共鳴周波数ｆの次数をｎ＝１、２、
３、‥‥‥、図３に示すようにサイドブランチ１６の長
さをＬ（ｍ）、冷媒の音速（ｍ／ｓ）をＣとした場合、
以下の関係がある。Here, the resonance frequency of the container 1, that is, the discharge pipe 14, is f, and the order of the resonance frequency f is n = 1, 2,
3, ‥‥‥, when the length of the side branch 16 is L (m) and the sound speed (m / s) of the refrigerant is C as shown in FIG.
There is the following relationship.
【００１６】ｆ＝（２ｎ−１）Ｃ／４Ｌ サイドブランチ１６の長さＬは、容器１の固有周波数ｆ
を予め測定することによって知ることができるので、そ
れに基づいて決める。F = (2n-1) C / 4L The length L of the side branch 16 is equal to the natural frequency f of the container 1.
Can be known by measuring in advance, and it is determined based on that.
【００１７】また、上記式より明らかなように、共鳴周
波数ｆに構造上係わるのはサイドブランチ１６の長さＬ
だけであり、共鳴形もしくは多段膨張形の消音器のよう
に容積に影響されない。したがって、サイドブランチ１
６は吐出管１４の外径と同径、もしくは外径以下の管で
もよく、設置容積を大きく必要としないため容易に密閉
容器１内に取り付けることができ、その長さＬも自由に
設定することができる。As is apparent from the above equation, the resonance frequency f is structurally related to the length L of the side branch 16.
And is not affected by volume as in the case of the resonance type or the multistage expansion type muffler. Therefore, side branch 1
Reference numeral 6 may be a pipe having the same diameter as the outer diameter of the discharge pipe 14 or a pipe having a diameter equal to or smaller than the outer diameter. Since the installation volume does not need to be large, it can be easily mounted in the closed container 1 and its length L can be set freely. be able to.
【００１８】上記構成の密閉形電動圧縮機の作用を、次
に説明する。The operation of the hermetic electric compressor having the above configuration will be described below.
【００１９】電動機部２によりクランクシャフト５が１
回転すると、圧縮機構部３のピストン９が１往復運動を
し、この往復運動によって図２に矢印で示すように、冷
凍サイクルの負荷から戻ってきた冷媒は、吸い込み側サ
イレンサ１０から流路１２ａを経てシリンダ８に吸い込
まれ（吸い込み工程）、圧縮されて吐出される（吐出工
程）。圧縮された冷媒は、流路１３ａを経て吐出側サイ
レンサ１１へ送り込まれる。流路１３ａにおいて吸い込
み工程と吐出工程との間で圧力差いわゆる吐出脈動（も
しくは圧力脈動）が発生するが、吐出側サイレンサ１１
においてこの吐出脈動は低減されるものの、吐出脈動を
十分に低減することはできない。The motor unit 2 causes the crankshaft 5 to
When rotated, the piston 9 of the compression mechanism 3 makes one reciprocating motion, and as a result of this reciprocating motion, the refrigerant returned from the load of the refrigeration cycle flows through the flow path 12a from the suction-side silencer 10 as shown by the arrow in FIG. After that, it is sucked into the cylinder 8 (suction process), compressed and discharged (discharge process). The compressed refrigerant is sent to the discharge side silencer 11 via the flow path 13a. In the flow path 13a, a pressure difference between the suction process and the discharge process, that is, a discharge pulsation (or pressure pulsation) is generated.
In this case, the discharge pulsation is reduced, but the discharge pulsation cannot be sufficiently reduced.
【００２０】本来、この吐出サイレンサ１１において吐
出脈動を十分に低減する必要があるものであるが、密閉
容器１内には空間的余裕はなく、このため吐出サイレン
サ１１の容積は制限され、したがって吐出脈動の全周波
数帯域において低減することができない。このため、一
部の周波数帯域が残って吐出脈動は吐出サイレンサ１１
を通過し、吐出管１４、密閉容器１に固定された吐出管
１５を経て図示しない冷凍装置（サイクル）側の配管へ
伝わり、振動、騒音等の原因になる。しかし、サイドブ
ランチ１６を取り付けることにより、密閉容器１に伝わ
る吐出脈動は低減し、振動、騒音の低減を図ることがで
きる。Originally, it is necessary to sufficiently reduce the discharge pulsation in the discharge silencer 11, but there is no space in the closed container 1, so that the volume of the discharge silencer 11 is limited, and therefore the discharge silencer 11 is limited. It cannot be reduced in the entire frequency band of the pulsation. Therefore, a part of the frequency band remains, and the discharge pulsation is caused by the discharge silencer 11.
Through the discharge pipe 14 and the discharge pipe 15 fixed to the closed container 1 to the piping of the refrigeration apparatus (cycle) (not shown), which causes vibration, noise, and the like. However, by attaching the side branch 16, discharge pulsation transmitted to the sealed container 1 is reduced, and vibration and noise can be reduced.
【００２１】上述するように、本実施例によれば、吐出
管１４の柔軟性が失われることはなく圧縮機構部３、電
動機部２の振動が密閉容器１へ伝わることはなくなるの
で、密閉容器１の共振による騒音の発生を防止できる。As described above, according to the present embodiment, the flexibility of the discharge pipe 14 is not lost, and the vibration of the compression mechanism 3 and the electric motor 2 is not transmitted to the closed container 1. 1 can be prevented from generating noise.
【００２２】図４は、吐出管に閉管形消音器を取り付け
る場合の第２の実施例を示す。本実施例は、密閉容器１
内の空間にサイドブランチ１７を折り曲げて取り付ける
場合を示す。すなわち、共鳴周波数ｆの関係で長いサイ
ドブランチ１７を取り付ける必要があるにもかかわら
ず、取り付ける空間を密閉容器１内に確保できない場合
に好適なものである。FIG. 4 shows a second embodiment in which a closed tube silencer is attached to a discharge pipe. In this embodiment, the closed container 1
The case where the side branch 17 is bent and attached to the inner space is shown. In other words, this is suitable for a case where the long side branch 17 needs to be attached due to the resonance frequency f, but the attachment space cannot be secured in the closed casing 1.
【００２３】本実施例によれば、密閉容器１内に十分な
空間がない場合でもサイドブランチ１７を取り付けるこ
とができる。According to this embodiment, the side branch 17 can be attached even when there is not enough space in the closed container 1.
【００２４】図５は、吐出管に閉管形消音器を取り付け
る場合の第３の実施例を示す。本実施例は、吐出管１４
に複数個のサイドブランチ１８（１８ａ，１８ｂ１８
ｃ）を取り付ける場合を示す。すなわち、低減の対象と
なる共鳴周波数ｆが複数個ある場合に、サイドブランチ
１８ａ，１８ｂ１８ｃをそれぞれ共鳴周波数ｆに応じた
長さＬａ，Ｌｂ，Ｌｃに設定して吐出管１４に取り付け
るものである。FIG. 5 shows a third embodiment in which a closed pipe type silencer is attached to a discharge pipe. In this embodiment, the discharge pipe 14
A plurality of side branches 18 (18a, 18b18
The case where c) is attached is shown. That is, when there are a plurality of resonance frequencies f to be reduced, the side branches 18a, 18b, 18c are set to lengths La, Lb, Lc corresponding to the resonance frequencies f, respectively, and are attached to the discharge pipe 14.
【００２５】すなわち、密閉形電動圧縮機はピストン９
の径、クランクピン５ａの偏心量を変えることにより押
除量を変化させて多機種の圧縮機に応じており、それぞ
れの機種で吐出脈動の周波数が違う。このため、多種の
吐出サイレンサを必要とする。しかし、各機種に適合し
た吐出サイレンサを準備するのは量産性を考慮するとコ
スト上、問題がある。それに対し、安価なサイドブラン
チ１８を吐出管１４に複数個設けるけことにより複数の
共鳴周波数ｆに対応でき、これによって吐出脈動の周波
数の違う各機種に適用可能となる。That is, the hermetic electric compressor uses the piston 9
The compression amount is changed by changing the diameter of the crank pin 5a and the eccentric amount of the crank pin 5a, so that the frequency of the discharge pulsation differs depending on each model. For this reason, various types of discharge silencers are required. However, preparing a discharge silencer suitable for each model has a problem in terms of cost in consideration of mass productivity. On the other hand, by providing a plurality of inexpensive side branches 18 in the discharge pipe 14, it is possible to cope with a plurality of resonance frequencies f, thereby making it possible to apply to various models having different discharge pulsation frequencies.
【００２６】図６に、密閉容器１に取り付けた吐出管１
４の吐出脈動の一例を破線でもって示す。本実施例は、
サイドブランチ１８ａ，１８ｂ１８ｃの共鳴周波数ｆを
それぞれ４００Ｈｚ、５００Ｈｚ、２０００Ｈｚに設定
したものであり、図から明らかなように、４００Ｈｚ、
５００Ｈｚ、２０００Ｈｚの吐出脈動を低減することが
できる。FIG. 6 shows the discharge pipe 1 attached to the closed vessel 1.
An example of the discharge pulsation of No. 4 is indicated by a broken line. In this embodiment,
The resonance frequencies f of the side branches 18a, 18b18c are set to 400 Hz, 500 Hz, and 2000 Hz, respectively.
Discharge pulsation at 500 Hz and 2000 Hz can be reduced.
【００２７】本実施例によれば、吐出サイレンサ６にて
低減できずに残った吐出脈動の周波数が複数ある場合に
はそれぞれの共鳴周波数ｆに対応して、確実に吐出脈動
を低減でき、また、吐出脈動の周波数が違う多機種の密
閉形電動圧縮機に適用でき、共用化できるのでコスト低
減が図れる、という効果がある。According to the present embodiment, when there are a plurality of remaining discharge pulsation frequencies which cannot be reduced by the discharge silencer 6, the discharge pulsation can be reliably reduced corresponding to each resonance frequency f. The present invention can be applied to many types of hermetic electric compressors having different discharge pulsation frequencies and can be used in common, so that the cost can be reduced.
【００２８】[0028]
【発明の効果】本発明によれば、吐出管の柔軟性が失わ
れることはなく圧縮機構部、電動機部の振動が密閉容器
へ伝わることはなくなるので、密閉容器の共振による騒
音の発生を防止でき、低騒音の密閉形電動圧縮機を提供
することができる。According to the present invention, since the flexibility of the discharge pipe is not lost and the vibration of the compression mechanism and the electric motor is not transmitted to the closed container, generation of noise due to resonance of the closed container is prevented. Thus, a low noise hermetic electric compressor can be provided.
【図１】本発明の第１の実施例に係わる密閉形電動圧縮
機の縦断面図である。における平面図である。FIG. 1 is a longitudinal sectional view of a hermetic electric compressor according to a first embodiment of the present invention. FIG.
【図２】図１の実施例の密閉形電動圧縮機の平面図であ
る。FIG. 2 is a plan view of the hermetic electric compressor of the embodiment of FIG.
【図３】図１の実施例で、吐出管に閉管形消音器を取り
付ける場合を示す。FIG. 3 shows a case where a closed pipe type silencer is attached to a discharge pipe in the embodiment of FIG.
【図４】吐出管に閉管形消音器を取り付ける場合の第２
の実施例を示す。FIG. 4 shows a second case in which a closed pipe type silencer is attached to a discharge pipe.
The following shows an example.
【図５】吐出管に閉管形消音器を取り付ける場合の第３
の実施例を示す。。FIG. 5 shows a third case in which a closed pipe silencer is attached to the discharge pipe.
The following shows an example. .
【図６】従来の密閉形電動圧縮機と本発明の実施例に係
る密閉形電動圧縮機との吐出脈動の比較を示す図であ
る。FIG. 6 is a diagram showing a comparison of discharge pulsation between the conventional hermetic electric compressor and the hermetic electric compressor according to the embodiment of the present invention.
１…密閉容器、２…電動機部、２ａ…固定子、２ｂ…回
転子、３…圧縮機構部、４…ばね、５…クランクシャフ
ト、５ａ…クランクピン、５ｂ…ポンプ、７…スライ
ダ、８…シリンダ、９…ピストン、１０…吸い込み側サ
イレンサ、１１…吐出側サイレンサ、１２，１３…カバ
ー、１２ａ，１３ａ…流路、１４，１５…吐出管、１
６，１７，１８…サイドブランチ（閉管形消音器）。DESCRIPTION OF SYMBOLS 1 ... Closed container, 2 ... Electric motor part, 2a ... Stator, 2b ... Rotor, 3 ... Compression mechanism part, 4 ... Spring, 5 ... Crank shaft, 5a ... Crank pin, 5b ... Pump, 7 ... Slider, 8 ... Cylinder, 9 ... piston, 10 ... suction side silencer, 11 ... discharge side silencer, 12, 13 ... cover, 12a, 13a ... flow path, 14, 15 ... discharge pipe, 1
6, 17, 18 ... Side branch (closed tube silencer).
フロントページの続き (72)発明者 矢沢 秀樹 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所冷熱事業部内 Ｆターム(参考） 3H003 AA02 AB03 AC03 BA02 Continuation of front page (72) Inventor Hideki Yazawa 800, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture F-term in the Refrigeration Division, Hitachi, Ltd. 3H003 AA02 AB03 AC03 BA02
Claims (5)
納し、ピストンの往復運動によりガス冷媒の吸い込みと
吐出とを行い、圧縮ガス冷媒を吐出管へ吐出する密閉形
電動圧縮機において、 前記吐出管に開放端が接続され他端が閉鎖する閉管形消
音器を取り付けることを特徴とする密閉形電動圧縮機。1. A hermetic electric compressor in which an electric motor and a compression mechanism are housed in a closed container, and a reciprocating motion of a piston sucks and discharges a gas refrigerant and discharges a compressed gas refrigerant to a discharge pipe. A closed-type electric compressor, wherein a closed-tube type silencer having an open end connected to the discharge pipe and a closed end at the other end is attached to the discharge pipe.
出管の共鳴周波数をｆ、この共鳴周波数ｆの次数をｎ＝
１、２、３、…、冷媒の音速（ｍ／ｓ）をＣとした場
合、 ｆ＝（２ｎ−１）Ｃ／４Ｌ とすることを特徴とする請求項１記載の密閉形電動圧縮
機。2. The length L (m) of the closed tube silencer is represented by f representing the resonance frequency of the discharge pipe and n = the order of the resonance frequency f.
The sealed electric compressor according to claim 1, wherein f = (2n-1) C / 4L where 1, 2, 3,..., The sound speed (m / s) of the refrigerant is C.
納し、これら電動機と圧縮機構部とをクランクシャフト
及びクランクピンを介して連結し、前記圧縮機構部はク
ランクピンの回転運動を往復運動に変換するスライダ
と、このスライダによりシリンダ内で往復運動を繰り返
すピストンと、このピストンの往復運動によりガス冷媒
の吸い込みと吐出とを行い、圧縮ガス冷媒を吐出管へ吐
出する密閉形電動圧縮機において、 前記シリンダの上死点側に吐出サイレンサーを設け、 この吐出サイレンサーに前記吐出管を接続し、 この吐出管には、開放端が接続され他端が閉鎖する閉管
形消音器を取り付けることを特徴とする密閉形電動圧縮
機。3. An electric motor and a compression mechanism are housed in a closed container, and the electric motor and the compression mechanism are connected via a crankshaft and a crankpin. The compression mechanism reciprocates the rotational movement of the crankpin. A slider that converts motion into a motion, a piston that repeats reciprocating motion in a cylinder by the slider, and a sealed electric compressor that sucks and discharges a gas refrigerant by reciprocating the piston and discharges a compressed gas refrigerant to a discharge pipe. In the above, a discharge silencer is provided on the top dead center side of the cylinder, the discharge pipe is connected to the discharge silencer, and a closed pipe type silencer connected to an open end and closed at the other end is attached to the discharge pipe. Features a hermetic electric compressor.
に直管もしくは折り曲げて形成することを特徴とする請
求項３記載の密閉形電動圧縮機。4. The hermetic electric compressor according to claim 3, wherein the closed-muffler is formed as a straight pipe or bent in a discharge pipe in a closed container.
管にそれぞれ長さが異なるようにして複数個取り付ける
ことを特徴とする請求項３記載の密閉形電動圧縮機。5. The hermetic electric compressor according to claim 3, wherein a plurality of the closed-tube silencers are attached to discharge pipes in a closed vessel so as to have different lengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10318791A JP2000145634A (en) | 1998-11-10 | 1998-11-10 | Hermetic electrically driven compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10318791A JP2000145634A (en) | 1998-11-10 | 1998-11-10 | Hermetic electrically driven compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000145634A true JP2000145634A (en) | 2000-05-26 |
Family
ID=18102994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10318791A Withdrawn JP2000145634A (en) | 1998-11-10 | 1998-11-10 | Hermetic electrically driven compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000145634A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100693170B1 (en) * | 2001-05-18 | 2007-03-13 | 주식회사 엘지이아이 | Oil Pumping apparatus for hermetic compressor |
| KR100693142B1 (en) * | 2001-05-18 | 2007-03-13 | 주식회사 엘지이아이 | Oil Pumping apparatus for hermetic compressor |
| JP2007240009A (en) * | 2007-06-25 | 2007-09-20 | Kobe Steel Ltd | Pressure pulsation absorption device |
-
1998
- 1998-11-10 JP JP10318791A patent/JP2000145634A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100693170B1 (en) * | 2001-05-18 | 2007-03-13 | 주식회사 엘지이아이 | Oil Pumping apparatus for hermetic compressor |
| KR100693142B1 (en) * | 2001-05-18 | 2007-03-13 | 주식회사 엘지이아이 | Oil Pumping apparatus for hermetic compressor |
| JP2007240009A (en) * | 2007-06-25 | 2007-09-20 | Kobe Steel Ltd | Pressure pulsation absorption device |
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