JPH037589Y2 - - Google Patents
Info
- Publication number
- JPH037589Y2 JPH037589Y2 JP1985042131U JP4213185U JPH037589Y2 JP H037589 Y2 JPH037589 Y2 JP H037589Y2 JP 1985042131 U JP1985042131 U JP 1985042131U JP 4213185 U JP4213185 U JP 4213185U JP H037589 Y2 JPH037589 Y2 JP H037589Y2
- Authority
- JP
- Japan
- Prior art keywords
- branch pipe
- suction
- muffling
- compression element
- pipe
- 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.)
- Expired
Links
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 230000000694 effects Effects 0.000 description 6
- 230000001743 silencing effect Effects 0.000 description 5
- 230000030279 gene silencing Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Compressor (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は密閉型圧縮機の消音構造、詳しくは圧
縮要素に内部吸入管を接続して成る密閉型圧縮機
の消音構造に関する。[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a sound deadening structure for a hermetic compressor, and more particularly, to a sound deadening structure for a hermetic compressor in which an internal suction pipe is connected to a compression element.
（従来の技術）
本願出願人は先に、実願昭59−56322号におい
て、密閉ケーシング内に流入した吸入ガスが圧縮
要素に吸込されるときに生ずる吸入音を消音する
消音構造を提案した。(Prior Art) The applicant of the present application previously proposed in Utility Model Application No. 59-56322 a noise-muffling structure for muffling the suction noise generated when suction gas that has flowed into a closed casing is sucked into a compression element.
しかして前記消音構造は、第５図に示す低圧ド
ーム形の密閉型圧縮機に適用したものである。 The above-mentioned silencing structure is applied to the low-pressure dome-shaped hermetic compressor shown in FIG.
前記圧縮機の構造を概略説明しておくと、圧縮
要素３を設けた架構４と、モータカバー７で被嵌
されるモータ２とから組立体を形成し、該組立体
を前記密閉ケーシング１に内装すると共に、前記
モータカバー７の下部に開放部９を形成して、該
開放部９を介し前記ケーシング１内に流入された
吸入ガスを前記モータカバー７の内部に供給する
ごとくなす一方、前記モータカバー７の上部と前
記圧縮要素３とを吸入管１１で接続し、前記ケー
シング１内に導入した吸入ガスを、矢印で示す如
く前記吸入管１１を介して、前記圧縮要素３に流
入させるようにしている。 To roughly explain the structure of the compressor, an assembly is formed from a frame 4 provided with a compression element 3 and a motor 2 fitted with a motor cover 7, and the assembly is attached to the sealed casing 1. At the same time, an open part 9 is formed at the lower part of the motor cover 7 so that the suction gas flowing into the casing 1 through the open part 9 is supplied to the inside of the motor cover 7. The upper part of the motor cover 7 and the compression element 3 are connected by a suction pipe 11, and the suction gas introduced into the casing 1 is made to flow into the compression element 3 via the suction pipe 11 as shown by the arrow. I have to.
しかして、前記消音構造は、第５，６図に示す
ごとく、前記吸入管１１の中間一部に、該吸入管
１１に対し半径方向外方に延びる筒状の消音枝管
１２を接続し、該枝管１２の先端を別体に形成し
た平板１２ｘにより直交状に閉塞して形成したも
ので、前記圧縮要素３から前記枝管１２の分岐位
置までの距離Ｌ１と、前記枝管１２の長さＬ２と
を調節することにより、前記圧縮要素３の特定の
周波数の吸入音を効果的に吸収するごとくなした
ものである。 As shown in FIGS. 5 and 6, the muffling structure connects a cylindrical muffling branch pipe 12 extending radially outward with respect to the suction pipe 11 to a middle part of the suction pipe 11, The tip of the branch pipe 12 is orthogonally closed by a separately formed flat plate 12x, and the distance L1 from the compression element 3 to the branching position of the branch pipe 12 and the length of the branch pipe 12 are By adjusting the length L2, the suction sound of a specific frequency of the compression element 3 can be effectively absorbed.
（考案が解決しようとする問題点）
ところが、前記消音構造にあつては、同一機種
の圧縮機に同一仕様の前記消音構造を用いても、
その消音効果に大きなむらを生じる問題があつ
た。(Problem to be solved by the invention) However, in the case of the above-mentioned sound deadening structure, even if the sound deadening structure with the same specifications is used in the same model of compressor,
There was a problem that the silencing effect was greatly uneven.
この原因を調べてみると、同一機種の圧縮機で
あつても、各圧縮機ごとの製作誤差などに起因し
て、消音すべき周波数域にある吸入音のピークの
周波数（以下、吸入音の周波数という）がわずか
づつ異なり、しかも前記枝管１２を用いた前記消
音構造は特定の周波数の吸入音の吸収効果が良い
反面、吸収できる周波数の幅が狭いことに原因が
あることが判明した。 When we investigated the cause of this problem, we found that even if the compressors are of the same model, the peak frequency of suction noise (hereinafter referred to as suction noise It has been found that the reason for this is that although the sound damping structure using the branch pipe 12 has a good effect of absorbing inhalation sound of a specific frequency, the range of frequencies that can be absorbed is narrow.
本考案は以上のごとき問題点及び原因の究明を
基に考案したもので、その目的は、前記消音枝管
の形状を工夫して、簡単な構造でありながら、圧
縮機の製作誤差に伴う消音効果のむらを少なくで
き、かつ、吸入音の吸収効果の良い消音構造を提
供することにある。 The present invention was devised based on the investigation of the above-mentioned problems and causes.The purpose of this invention is to devise the shape of the above-mentioned sound-muffling branch pipe, and to have a simple structure, while also muffling the noise caused by manufacturing errors of the compressor. It is an object of the present invention to provide a sound deadening structure which can reduce the unevenness of the effect and has a good effect of absorbing inhalation sound.
（問題点を解決するための手段）
本考案の消音構造は、第１乃至第４図に示すご
とく構成したもので、圧縮要素３に内部吸入管１
１を接続してなる密閉型圧縮機の消音構造におい
て、前記吸入管１１の前記圧縮要素３への接続部
近くに、該吸入管１１から分岐する消音枝管１２
を設け、該枝管１２の先端を略半球状に閉鎖し、
前記消音枝管１２の分岐位置から先端閉鎖位置ま
での距離を異ならしめたのである。(Means for Solving the Problems) The noise reduction structure of the present invention is constructed as shown in FIGS.
1, a noise-muffling branch pipe 12 branching from the suction pipe 11 is provided near the connection portion of the suction pipe 11 to the compression element 3.
is provided, and the tip of the branch pipe 12 is closed in a substantially hemispherical shape,
The distance from the branching position of the muffling branch pipe 12 to the end closing position is made different.
（作用）
しかして前記消音枝管１２の先端を略半球状に
閉鎖したから、該枝管１２の分岐位置から先端側
閉鎖位置までの距離L1（例えばL11，L12）が、こ
の枝管１２の半径方向位置ｒ４例えばr1，r2）に
おいて連続的に異なることゝなり、この結果、一
つの消音枝管１２で吸収できる吸入音の周波数域
が連続的に拡大し、このことにより、前記圧縮機
毎の製作誤差などによつて吸入音の周波数がわず
かにずれても、これら周波数の異なる吸入音が何
れも効果的に吸収されるである。(Function) Since the distal end of the muffling branch pipe 12 is closed in a substantially hemispherical shape, the distance L 1 (for example, L 11 , L 12 ) from the branch position of the branch pipe 12 to the closed position on the distal end side is The radial position r4 (for example, r 1 , r 2 ) of the pipe 12 varies continuously, and as a result, the frequency range of the intake sound that can be absorbed by one muffling branch pipe 12 continuously expands. Even if the frequency of the suction sound varies slightly due to manufacturing errors of each compressor, all of the suction sounds with different frequencies can be effectively absorbed.
（実施例）
以下本考案にかかる密閉型圧縮機の消音構造を
図面の実施例によつて説明する。(Example) The noise reduction structure of the hermetic compressor according to the present invention will be explained below with reference to the examples shown in the drawings.
第１図は縦形の全密閉型圧縮機を示し、密閉ケ
ーシング１の内方上部にモータ２を、下部に圧縮
要素３を備えた架構４をそれぞれ配置して、前記
モータ２と前記圧縮要素３とを、前記架構４に支
持したクランク軸５を介して連結すると共に、前
記架構４に吸込チヤンバー６を形成して、前記モ
ータ２の回転に伴う前記圧縮要素３の駆動によ
り、前記ケーシング１内の吸入ガスを前記チヤン
バー６を介して前記圧縮要素３内に吸入し、該圧
縮要素３で圧縮して前記ケーシング１の外部に吐
出するごとくしている。 FIG. 1 shows a vertical hermetic compressor, in which a motor 2 is disposed in the inner upper part of a hermetic casing 1, and a frame 4 equipped with a compression element 3 is disposed in the lower part. are connected to each other via a crankshaft 5 supported by the frame 4, and a suction chamber 6 is formed in the frame 4, whereby the inside of the casing 1 is driven by the compression element 3 as the motor 2 rotates. The suction gas is drawn into the compression element 3 through the chamber 6, compressed by the compression element 3, and discharged to the outside of the casing 1.
前記吸入チヤンバー６は、図示していないが、
前記圧縮要素３の２つシリンダ３１の配設方向に
沿つて上下方向に延びている。 Although the suction chamber 6 is not shown,
The two compression elements 3 extend vertically along the direction in which the cylinders 31 are arranged.
また前記架構４の上部には、前記モータ２を覆
うモータカバー７を設けて、該カバー７と前記モ
ータ２との間に吸入ガス通路８を形成すると共
に、前記カバー７の下部で前記架構４との連結部
位を開放させて、この開放部９を介し前記吸入ガ
ス通路８を前記ケーシング１内に連通させる一
方、前記カバー７の頂部内方に中間チヤンバー１
０を形成し、この中間チヤンバー１０と前記架構
４に設けた吸入チヤンバー６とを、前記カバー７
の外部に配設した２つの内部吸入管１１で連結し
て、前記ケーシング１内に流入された吸入ガスを
前記開放部９から吸入ガス通路８を介して前記中
間チヤンバー１０へと導入させ、該チヤンバー１
０から前記各吸入管１１を介し前記吐出チヤンバ
ー６に吸入するごとくしている。 Further, a motor cover 7 is provided on the upper part of the frame 4 to cover the motor 2, and an intake gas passage 8 is formed between the cover 7 and the motor 2. The suction gas passage 8 is communicated with the inside of the casing 1 through the opening part 9 by opening the connection part with the intermediate chamber 1 inside the top of the cover 7.
0, and the intermediate chamber 10 and the suction chamber 6 provided on the frame 4 are connected to the cover 7.
The suction gas introduced into the casing 1 is introduced into the intermediate chamber 10 from the opening 9 through the suction gas passage 8, and chamber 1
0 to the discharge chamber 6 through the suction pipes 11.
しかして前記のごとき密閉型圧縮機において、
前記吸入管１１に消音構造を設け、該消音構造に
より前記中間チヤンバー１０から前記吸入チヤン
バー６を経て前記圧縮要素３に至る吸入ガスの吸
入音を消音するごとくしたのである。 However, in the hermetic compressor as mentioned above,
The suction pipe 11 is provided with a muffling structure, and the muffling structure muffles the suction sound of the suction gas flowing from the intermediate chamber 10 through the suction chamber 6 to the compression element 3.
息ち、第２及び第３に詳しく示すごとく、前記
吸入管１１の前記圧縮要素３への接続部近くで、
該圧縮要素３から高さＬ２の位置に、前記吸入管
１１から分岐する円筒状の消音枝管１２を半径方
向外方に向け、内部連通状に接続すると共に、該
枝管１２の先端を略々半球状に閉鎖するのであ
る。 As shown in detail in the second and third sections, near the connection of the suction tube 11 to the compression element 3,
At a height L2 from the compression element 3, a cylindrical muffling branch pipe 12 branching from the suction pipe 11 is oriented radially outward and connected in an internal communication manner, and the tip of the branch pipe 12 is approximately connected. It closes into a hemispherical shape.
かくすることにより、前記枝管１２の半径方向
位置ｒ（例えばr1，r2）における、該枝管１２の
分岐位置から先端側閉鎖位置までの距離Ｌ１（例
えばL11，L12）を連続的に異ならしめるごとくし
たのである。 By doing this, the distance L1 (for example, L 11 , L 12 ) from the branching position of the branch pipe 12 to the distal end side closing position at the radial position r (for example, r 1 , r 2 ) of the branch pipe 12 is continuously maintained. This was done to make them different.
斯くして前記枝管１２の分岐位置から前記閉鎖
部１２ａの閉鎖内面位置までの距離Ｌ１を連続的
に異ならしめたことにより、前記枝管１２で吸収
できる吸入音の周波数域を連続的に拡大させ、吸
入ガスの吸入音が圧縮機毎に多少異なつても、こ
の周波数の異なる吸入音を効果的に消音するごと
くしたのである。 By continuously varying the distance L1 from the branching position of the branch pipe 12 to the closed inner surface position of the closing portion 12a, the frequency range of the intake sound that can be absorbed by the branch pipe 12 is continuously expanded. Even if the suction sound of suction gas differs somewhat from compressor to compressor, this suction sound with different frequencies can be effectively muffled.
図の実施例においては、前記吸入音１１の上下
位置に２つの消音枝管１２，１２を設け、この各
枝管１２の先端部を前述したごとく半球状に閉鎖
しており、また前記各枝管１２のうち上部側枝管
１２は、先端部を上方に向けて屈曲させている。 In the embodiment shown in the figure, two muffling branch pipes 12, 12 are provided above and below the intake sound 11, the tip of each branch pipe 12 is closed in a hemispherical shape as described above, and each of the branches is The upper side branch pipe 12 of the pipe 12 has its tip bent upward.
前記各枝管１２は、それぞれ銅管で形成して、
この各枝管１２の先端部をスパン加工により半球
状に閉鎖するのである。斯くすることにより、第
６図に示した従来のように先端側閉鎖部に、閉鎖
用の別部材を設ける必要がなく、部品点数が減少
すると共に、加工作業も簡単となるのである。 Each of the branch pipes 12 is formed of a copper pipe,
The tip of each branch pipe 12 is closed into a hemispherical shape by span processing. By doing so, there is no need to provide a separate member for closing at the distal end side closing portion as in the conventional structure shown in FIG. 6, which reduces the number of parts and simplifies the machining work.
尚、前記枝管１２の管径が大きく、スパン加工
後において先端部に小孔が残る場合には、ロー付
け手段により閉鎖するのである。 Incidentally, if the diameter of the branch pipe 12 is large and a small hole remains at the tip after span processing, it is closed by brazing means.
次に本考案にかかる消音構造の実験データを、
従来のものと比較して説明する。 Next, the experimental data of the sound deadening structure according to the present invention is
This will be explained in comparison with the conventional one.
第４図の実験データは、圧縮要素でホワイトノ
イズを発生させて、ノイズの周波数に対する消音
効果の変化を測定したもので、横軸に周波数を、
縦軸に騒音レベルをとつたグラフを示し、該図に
おいて曲線イは前記消音枝管１２を設けないもの
を、また曲線ロは前記枝管１２を設け、該枝管１
２の先端部を直角状に閉鎖したものを、さらに曲
線ハは本考案を実施したものをそれぞれ示してい
る。 The experimental data shown in Figure 4 was obtained by generating white noise with a compression element and measuring the change in the silencing effect with respect to the frequency of the noise.The horizontal axis shows the frequency.
A graph is shown in which the vertical axis represents the noise level, and in this figure, curve A indicates the case where the muffling branch pipe 12 is not provided, and curve B indicates the case where the branch pipe 12 is provided and the branch pipe 1 is provided.
Curve 2 shows the one in which the tip end is closed at a right angle, and curve C shows the one in which the present invention is implemented.
しかして前記第４図に示す如く、減衰が必要な
周波数域Ｄにおいて、前記枝管１２を設けて先端
部を直角状に閉鎖したもの（曲線ロ）は特定の周
波数f0近傍の狭い範囲で大きな消音効果を発揮す
る反面、ノイズの周波数が前記範囲からわずかに
ずれると、急速に消音効果が低下するのである。 However, as shown in FIG. 4, in the frequency range D where attenuation is required, the branch pipe 12 whose tip is closed at a right angle (curve B) has a narrow range near a specific frequency f 0 . Although it exhibits a great silencing effect, if the frequency of the noise deviates slightly from the above range, the silencing effect rapidly decreases.
これに対して前記曲線ハに示す本考案の消音構
造では、ノイズの周波数の前記周波数f0からのず
れに伴なう、消音効果の低下が比較的緩やかであ
るから、広い周波数範囲にわたるノイズが有効に
除去されるのであり、従つて例え圧縮機に制作誤
差などがあつて、吸入音の周波数に変動があつて
も比較的むらなく消音できるのである。また、運
転条件の変化によつて、前記吸入音の周波数が多
少ずれた場合でも、良好な消音効果を発揮するの
である。 On the other hand, in the silencing structure of the present invention shown in curve C, the silencing effect decreases relatively slowly as the noise frequency deviates from the frequency f 0 , so noise over a wide frequency range is reduced. Therefore, even if there is a manufacturing error in the compressor and the frequency of the intake sound fluctuates, the noise can be suppressed relatively evenly. Further, even if the frequency of the intake sound shifts somewhat due to changes in operating conditions, a good noise reduction effect is achieved.
（考案の効果）
以上説明したごとく本考案にかかる密閉型圧縮
機の消音構造では、圧縮要素３に接続する吸入管
１１の前記圧縮要素３への接続部近くに、該吸入
管１１から分岐する消音枝管１２を設け、該消音
枝管１２の先端を略半球状に閉鎖するごとくした
から、前記枝管１２の分岐位置から先端閉鎖位置
までの距離を、この枝管１２の半径方向位置にお
いて連続的に異ならしめることができ、従つて、
一つの消音枝管１２で吸収できる吸入音の周波数
域を連続的に拡大させることが可能となり、前記
圧縮機の製作誤差などにより吸入音のピーク周波
数がわずかにずれても、このピーク周波数のずれ
にかゝわらず効果的に消音して、簡単な構造でも
つて各圧縮機における消音効果のむらを抑制し得
るに至つたのである。(Effects of the Invention) As explained above, in the noise reduction structure of the hermetic compressor according to the present invention, the suction pipe 11 that is connected to the compression element 3 has a branch from the suction pipe 11 near the connection part to the compression element 3. Since the muffling branch pipe 12 is provided and the distal end of the muffling branch pipe 12 is closed in a substantially hemispherical shape, the distance from the branching position of the branch pipe 12 to the distal end closing position is determined by the radial position of the branch pipe 12. can be made to differ continuously, therefore,
It is now possible to continuously expand the frequency range of suction sound that can be absorbed by one muffling branch pipe 12, and even if the peak frequency of suction sound shifts slightly due to manufacturing errors of the compressor, this peak frequency shift can be avoided. Regardless of the situation, it has been possible to effectively muffle the noise and suppress unevenness in the muffling effect of each compressor with a simple structure.
第１図は本考案の消音構造を実施した密閉型圧
縮機の縦断面図、第２図は同要部の一部切欠き斜
面図、第３図は同消音構造を示す一部切欠き正面
図、第４は実験データを示す消音グラフ、第５及
び第６図は従来例を示す図面である。
３……圧縮要素、１１……吸入管、２……消音
枝管。
Fig. 1 is a vertical cross-sectional view of a hermetic compressor that implements the sound-absorbing structure of the present invention, Fig. 2 is a partially cut-away slope view of the same main part, and Fig. 3 is a partially-cut front view showing the same noise-absorbing structure. Figure 4 is a silencing graph showing experimental data, and Figures 5 and 6 are drawings showing conventional examples. 3... Compression element, 11... Suction pipe, 2... Silencing branch pipe.
Claims (1)
閉型圧縮機の消音構造であつて、前記吸入管１１
の前記圧縮要素３への接続部の近くに、該吸入管
１１から分岐する消音枝管１２を設け、該消音枝
管１２の先端を略半球状に閉鎖し、前記消音枝管
１２の分岐位置から先端閉鎖位置までの距離を異
ならしめたことを特徴とする密閉型圧縮機の消音
構造。 This is a noise-muffling structure for a hermetic compressor in which an internal suction pipe 11 is connected to a compression element 3, and the suction pipe 11
A muffling branch pipe 12 branching from the suction pipe 11 is provided near the connection to the compression element 3, and the distal end of the muffling branch pipe 12 is closed in a substantially hemispherical shape, and the branching position of the muffling branch pipe 12 is A sound deadening structure for a hermetic compressor, characterized by having different distances from the end to the closed end position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985042131U JPH037589Y2 (en) | 1985-03-23 | 1985-03-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985042131U JPH037589Y2 (en) | 1985-03-23 | 1985-03-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61157182U JPS61157182U (en) | 1986-09-29 |
| JPH037589Y2 true JPH037589Y2 (en) | 1991-02-25 |
Family
ID=30552596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985042131U Expired JPH037589Y2 (en) | 1985-03-23 | 1985-03-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH037589Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100497460B1 (en) * | 1996-05-10 | 2005-09-09 | 엠프레사 브라질리에라 데 콤프레소레스 에스.아.-엠브라코 | A suction arrangement for a reciprocating hermetic compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609368Y2 (en) * | 1980-03-21 | 1985-04-03 | 株式会社荏原製作所 | side branch type silencer |
-
1985
- 1985-03-23 JP JP1985042131U patent/JPH037589Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61157182U (en) | 1986-09-29 |
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