JPS63212789A - Variable capacity type scroll compressor - Google Patents
Variable capacity type scroll compressorInfo
- Publication number
- JPS63212789A JPS63212789A JP4408587A JP4408587A JPS63212789A JP S63212789 A JPS63212789 A JP S63212789A JP 4408587 A JP4408587 A JP 4408587A JP 4408587 A JP4408587 A JP 4408587A JP S63212789 A JPS63212789 A JP S63212789A
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- plate
- chamber
- scroll member
- intermediate pressure
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims description 47
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000005192 partition Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/16—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using lift valves
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、容量可変型スクロール圧縮機に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a variable capacity scroll compressor.
特に、うず巻体外周部から中心方向へ移動する流体ポケ
ットを、その移動の途中で中間圧力室を介して吸入室と
連通させるとともに、この中間圧力室と吸入室との連通
を開閉弁にて制御することＫよって流体の圧縮容量を可
変した容量可変型スクロール圧縮機に関する。In particular, the fluid pocket moving from the outer periphery of the spiral body toward the center is communicated with the suction chamber through an intermediate pressure chamber during its movement, and an on-off valve is used to connect the intermediate pressure chamber and the suction chamber. The present invention relates to a variable capacity scroll compressor in which the compression capacity of fluid is varied through control.
一般に、自動車用の空調システム等に用いられている冷
媒圧縮用の圧縮機は、電磁クラッチを介してエンジンに
よって駆動されている。エンジンの回転数は広範囲に変
化するため、圧縮機は９通常低回転数で充分能力が発揮
できるように設計される。しかしながらそのような固定
容積型の圧縮機では、エンジンの高回転数時において冷
房能力が過大となる。従って電磁クラッチの断接が頻繁
に起シ、エンジンの負荷の変動が著しく、車速および加
速性能に対して悪影響を及ぼす。又、圧縮機の運転始動
時には、エンジン回転数が増加するために燃費が悪化す
る等の間・題があった・このため冷媒の圧縮容量を可変
することによって、圧縮機の能力を調整する容量可変型
の圧縮機が提案されている。Generally, a compressor for compressing refrigerant used in an automobile air conditioning system or the like is driven by an engine via an electromagnetic clutch. Since the engine speed varies over a wide range, compressors are usually designed to operate at low engine speeds. However, such a fixed displacement compressor has an excessive cooling capacity when the engine speed is high. Therefore, the electromagnetic clutch frequently connects and disconnects, and the engine load fluctuates significantly, which adversely affects vehicle speed and acceleration performance. In addition, when the compressor starts operating, there are problems such as fuel consumption worsening due to the increase in engine speed.For this reason, the capacity of the compressor is adjusted by varying the refrigerant compression capacity. Variable compressors have been proposed.
従来の容量可変型スクロール圧縮機では、スクロールの
外周部から中央部へ移動する流体ポケットをその移動の
途中で中間圧力室を介して吸入室へ連通させるようにな
し、中間圧力室と吸入室との連通に開閉弁（ピストンパ
ルプ）を設け、この開閉弁を圧縮機の吐出ガスを電磁弁
によって制御して導入することで作動させ、これによっ
て流体の圧縮容量を可変していた。In conventional variable capacity scroll compressors, the fluid pocket moving from the outer periphery to the center of the scroll is communicated with the suction chamber via the intermediate pressure chamber during the movement, and the intermediate pressure chamber and the suction chamber are connected to each other. An on-off valve (piston pulp) was installed in the communication between the two, and this on-off valve was operated by controlling and introducing the discharge gas of the compressor with a solenoid valve, thereby varying the compression capacity of the fluid.
ところで、従来の容量可変型スクロール圧縮機では、バ
イパス孔が穿設された固定スクロール部材と、流体吸入
口と流体排出口とを有するハウジングの底部とで画成さ
れた室を、さらに隔壁で吸入連通室、中間圧カ室、吐出
室の３つの室に仕切らなくてはならず、ハウジング内部
の形状が複雑となって、ハウジング製造の際および圧縮
機組立の際の工数が多くなるとともに、ハウジングの重
量が増すという問題があった。また上記３つの室のシー
ルも確保しなければならず、固定スクロール部材と当接
する隔壁の端面の平面度および平行度等に高い精度が要
求されていた。さらに・ハウジング内部が複雑な形状を
しているため、他機種のハウジングとの共用がはかれな
いなどの問題点もあった。By the way, in a conventional variable capacity scroll compressor, a chamber defined by a fixed scroll member having a bypass hole and a bottom part of a housing having a fluid intake port and a fluid discharge port is further separated by a partition wall. The housing must be divided into three chambers: a communication chamber, an intermediate pressure chamber, and a discharge chamber, which complicates the shape of the inside of the housing and increases the number of man-hours required during housing manufacturing and compressor assembly. There was a problem that the weight of the It is also necessary to ensure sealing of the three chambers, and high accuracy is required in the flatness, parallelism, etc. of the end face of the partition wall that comes into contact with the fixed scroll member. Furthermore, the inside of the housing had a complicated shape, so there were other problems such as the fact that it could not be shared with other models' housings.
上述した従来技術における問題点を解決するために１本
発明は流体吸入口と、流体排出口とを形成したハウジン
グと、板体の一面上にうず巻体を有し、前記ハウジング
に固定された固定スクロール部材と、板体の一面上にう
ず巻体を有し、前記ハウジング内に貫挿された主軸の回
転によって円軌道上を運動する可動スクロール部材とを
備え。In order to solve the above-mentioned problems in the prior art, the present invention includes a housing in which a fluid inlet and a fluid outlet are formed, a spiral body on one surface of a plate, and a spiral body fixed to the housing. The scroll member includes a fixed scroll member, and a movable scroll member that has a spiral body on one surface of a plate body and moves on a circular orbit by rotation of a main shaft inserted into the housing.
前記可動スクロール部材のうず巻体を固定スクロール部
材のうず巻体に角度をずらして噛み合い状態で重ね合せ
て、前記２つのうず巻体の間に閉塞された流体ポケット
を形成し、前記可動スクロール部材をその回転を阻止し
ながら円軌道運動を行なわせることによって、前記流体
吸入口に連通した吸入室から流体を流体ポケットに吸入
し、前記固定スクロール部材の板体の中心部に設けた吐
出口から吐出室を介して前記流体排出口へ圧縮流体を排
出するようにしたスクロール圧縮機において。The spiral body of the movable scroll member is overlapped with the spiral body of the fixed scroll member in an angularly shifted and intermeshed state to form a closed fluid pocket between the two spiral bodies, and the spiral body of the movable scroll member By causing the fluid to move in a circular orbit while preventing its rotation, fluid is sucked into the fluid pocket from the suction chamber communicating with the fluid suction port, and fluid is sucked into the fluid pocket from the discharge port provided at the center of the plate of the fixed scroll member. A scroll compressor configured to discharge compressed fluid to the fluid discharge port via a discharge chamber.
前記固定スクロール部材の板体のうず巻体外端よシうず
巻に沿って内側に流体のバイパス孔が穿設されておシか
っ該流体パイ・ヤス孔の開閉を制御するために逆止弁が
設けられており，前記固定スクロール部材の板体の前記
可動スクロール部材とは反対側の端面上に前記バイパス
孔によって圧縮途中の流体ポケットと連通ずる中間圧力
室を形成するように板状部材が当接して配置され、該板
状部材は該中間圧力室と前記吸入室とを連通させる連通
部を有し、前記中間圧力室と吸入室との連通部に該吸入
室の圧力を感知して伸縮するベローズを内包する開閉弁
機構が設けられていることを特徴とするものである。A fluid bypass hole is bored inside the plate body of the fixed scroll member along the spiral, and a check valve is provided to control opening and closing of the fluid pipe hole. A plate member is provided on an end surface of the plate body of the fixed scroll member opposite to the movable scroll member so as to form an intermediate pressure chamber that communicates with the fluid pocket in the middle of compression through the bypass hole. The plate-like member has a communication portion that communicates the intermediate pressure chamber and the suction chamber, and expands and contracts in the communication portion between the intermediate pressure chamber and the suction chamber by sensing the pressure of the suction chamber. The device is characterized in that it is provided with an on-off valve mechanism that includes a bellows.
上記構成においては、開閉弁機構を有する板状部材を設
けるだけで、固定スクロール部材に穿設したバイパス孔
によって圧縮途中の流体ポケットと連通ずる中間圧力室
が形式され、しかも、開閉弁機構によシ吸入室と中間圧
力室との連通が制御される。即ち、開閉弁機構は吸入圧
が低下すると吸入圧力室と中間圧力室とを連通させるよ
うに作用し、これにより圧縮容量を低下させている。In the above configuration, by simply providing a plate-like member having an on-off valve mechanism, an intermediate pressure chamber communicating with a fluid pocket in the middle of compression is formed through a bypass hole bored in the fixed scroll member. Communication between the suction chamber and the intermediate pressure chamber is controlled. That is, when the suction pressure decreases, the on-off valve mechanism acts to connect the suction pressure chamber and the intermediate pressure chamber, thereby reducing the compression capacity.
以下示臼
〔実施例〕
以下９本発明の一実施例を添付図面に基づいて詳述する
。EMBODIMENT OF THE INVENTION Below, nine embodiments of the present invention will be described in detail based on the accompanying drawings.
第１図は１本発明の一実施例による圧縮機の断面図、第
２図は第１図のＡ −Ａ’断面図、第３図は固定スクロ
ール背部の部品構成を示した分解斜視図、第４図は開閉
弁機構を示した分解図である。FIG. 1 is a sectional view of a compressor according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. 3 is an exploded perspective view showing the component configuration of the back of the fixed scroll. FIG. 4 is an exploded view showing the on-off valve mechanism.
図示の圧縮機ハウジング１は、フロントエンドプレー）
１１とリヤエンドプレート１２とその間を接続する側壁
１３とによシ密閉室を形成しており、その側壁１３には
流体吸入口（図示せず）が。The compressor housing 1 shown is a front end play)
11, the rear end plate 12, and a side wall 13 connecting therebetween, forming a sealed chamber, and the side wall 13 has a fluid intake port (not shown).
またリヤーエンドプレート１２には流体の排出口１５が
形成されている。Further, a fluid outlet 15 is formed in the rear end plate 12.
フロントエンドプレー）１１にハ、 中央部に貫通孔１
１ａが形成され、その中にゴールペアリンダ１７を介し
て主軸１８が支承されている。Front end play) 11, through hole 1 in the center
1a is formed in which a main shaft 18 is supported via a goal pair cylinder 17.
また、該フロントエンドプレート１１に“［ｉ（図にお
いて左側）に突出し、主軸１８の外周を囲むスリーブｌ
ｌｂが形成され、該スリーブ１１ｂと主軸１８との間に
シャフトシール機構１６が配設されている。更に、スリ
ーブｌｌｂの外周上には電磁クラッチ装置９が配設され
ている。In addition, the front end plate 11 is provided with a sleeve l that protrudes toward the left side in the figure and surrounds the outer periphery of the main shaft 18.
lb is formed, and a shaft seal mechanism 16 is disposed between the sleeve 11b and the main shaft 18. Further, an electromagnetic clutch device 9 is arranged on the outer periphery of the sleeve llb.
この電磁クラッチ装置９は外部駆動源より回転運動をＶ
ベルト（図示しない）を介してプーリ８に伝達し励磁コ
イル９１への通電制御によって８から主軸１８へ回転運
動を伝達制御している。This electromagnetic clutch device 9 receives rotational movement from an external drive source.
The rotational motion is transmitted to the pulley 8 via a belt (not shown), and the rotational motion is controlled to be transmitted from 8 to the main shaft 18 by controlling the energization of the excitation coil 91.
フロントエンドプレート１１とリヤエンドプレート１２
と側壁１３とによって形成された密閉室内には固定スク
ロール２と可動スクロール３と可動スクロール３の駆動
機構３６と回転阻止機構３７と開閉弁機構６を配置した
ピストンパルプ内蔵プレート７とが配設されている。Front end plate 11 and rear end plate 12
A fixed scroll 2, a movable scroll 3, a drive mechanism 36 for the movable scroll 3, a rotation prevention mechanism 37, and a piston pulp built-in plate 7 in which an on-off valve mechanism 6 are disposed are arranged in the sealed chamber formed by the side wall 13 and the movable scroll 3. ing.
固定スクロール２と可動スクロール３は、それぞれ板体
２１および３１と、、その板体２１と３１に設けられた
うず巻体２２および３２を備えたもので２両スクロール
はうず巻体２２．３２が互いに角度をずらせて噛み合わ
されている。固定スクロール２は、その板体２１を７１
ウジング１の側壁１３内面にシール部材２６によりてシ
ールされながら固定され、ノ・ウジング内を２つの室に
仕切りている。この結果１両スクロールのうず巻体周辺
の空間は、流体吸入口（図示しない）と連通した吸入室
４を形成する。固定スクロール２０板体２１の可動スク
ロール３とは反対側の面と、リヤエンドプレート１２の
内面との間には開閉弁機構６を配置するピストンバルブ
内蔵プレート７が、固定スクロール２の板体２１とリヤ
エンドプレート１２の内面より立上った凸部１２１の先
端との間に配設されている。The fixed scroll 2 and the movable scroll 3 each include plate bodies 21 and 31, and spiral bodies 22 and 32 provided on the plates 21 and 31. They are interlocked with each other at different angles. The fixed scroll 2 has its plate body 21 at 71
It is sealed and fixed to the inner surface of the side wall 13 of the housing 1 by a sealing member 26, and partitions the inside of the housing into two chambers. As a result, the space around the spiral body of the single scroll forms a suction chamber 4 communicating with a fluid suction port (not shown). Between the surface of the fixed scroll 20 plate 21 opposite to the movable scroll 3 and the inner surface of the rear end plate 12, a piston valve built-in plate 7 in which an on-off valve mechanism 6 is disposed is connected to the fixed scroll 2 plate 21 and the inner surface of the rear end plate 12. It is disposed between the tip of the convex portion 121 rising from the inner surface of the rear end plate 12.
固定スクロール２の板体２１には、そのうず巻体２２の
外路端よシうず巻に沿って内側によった位置にバイパス
孔２４が穿設されるとともに、バイパス孔２４に対応し
た位置に逆止弁７５がデルドア６によってその一端を固
着されている。更に板体２１の周縁部に開口２５を形成
している。A bypass hole 24 is bored in the plate body 21 of the fixed scroll 2 at a position from the outer end of the spiral body 22 to the inside along the spiral, and a bypass hole 24 is bored at a position corresponding to the bypass hole 24. A check valve 75 is fixed at one end by a del door 6. Furthermore, an opening 25 is formed at the peripheral edge of the plate body 21.
また、固定スクロール２の板体２１の中央部には、うず
巻体の中心部の流体ポケットＰ０を吐出室５に連通ずる
吐出孔２３が形成されるとともに。Further, a discharge hole 23 is formed in the center of the plate body 21 of the fixed scroll 2 to communicate the fluid pocket P0 at the center of the spiral body with the discharge chamber 5.
吐出孔２３に対応した位置に逆止弁５５ががルト５６に
よってその一端を固着されている。A check valve 55 is fixed at one end by a bolt 56 at a position corresponding to the discharge hole 23 .
可動スクロール３は、板体３１のうず巻体３２と反対の
面上に、環状のポス３３を備えておシ。The movable scroll 3 includes an annular post 33 on the opposite surface of the plate body 31 from the spiral body 32.
ポス３３内にニードルベアリング３５を介して嵌合され
た円板状のブツシュ３４上に回転可能に支持されている
。円板状のブツシュ３４は、主軸１８の内端に偏心して
設けたクランクビン１８ａ上に。It is rotatably supported on a disc-shaped bush 34 fitted within the post 33 via a needle bearing 35. A disc-shaped bushing 34 is mounted on the crank pin 18a eccentrically provided at the inner end of the main shaft 18.
回転可能に支持されている。クランクビン１８８゜ブツ
シュ３４．ベアリング３５で可動スクロールの駆動機構
３６が構成されている。一方、板体３１とフロントエン
ドプレート１１との間には回転防止機構３７が設けられ
ている。Rotatably supported. Crankbin 188°button 34. The bearing 35 constitutes a movable scroll drive mechanism 36. On the other hand, a rotation prevention mechanism 37 is provided between the plate body 31 and the front end plate 11.
この結果、可動スクロール３は、主軸１８の回転によっ
て、自転を阻止されながらクランク半径の円軌道上を公
転運動する。この可動スクロール３の公転運動によ９９
両うず巻体２２．３２の線接触によりて形成される流体
ポケットＰはうず巻一体中右方向へ移動する。すなわち
流体ポケッ）Ｐに取り込まれた流体は容積を減少しつつ
圧縮されなからうず巻体中心方向へ移動する。As a result, the movable scroll 3 revolves around a circular orbit having a crank radius while being prevented from rotating due to the rotation of the main shaft 18. Due to this orbital movement of the movable scroll 3, 99
The fluid pocket P formed by the line contact of both spiral bodies 22, 32 moves to the right in the spiral body. That is, the fluid taken into the fluid pocket P decreases in volume and moves toward the center of the spiral body without being compressed.
従って、容量制御が行なわれなければ外部流体回路（図
示せず）から流体吸入口（図示せず）を通って吸入室４
に流入し２両うず巻体の外路端部から流体ポケット中に
取シ込まれた流体は、うず巻体中心方向への移動によっ
て圧縮された後、その全部が両うず巻体の中心部の流体
ポケットＰ０から吐出口２３を通って逆止弁５５を介し
て吐出室５へ送り出される。更に吐出室５がら流体排出
口１５を介して外部流体回路へ流出する。Therefore, if volume control is not performed, the suction chamber 4 is
The fluid that flows into the fluid pocket from the outer ends of the two spiral bodies is compressed by movement toward the center of the spiral bodies, and then all of the fluid flows into the center of both spiral bodies. The fluid is discharged from the fluid pocket P0 through the discharge port 23 and into the discharge chamber 5 via the check valve 55. Furthermore, the discharge chamber 5 flows out via the fluid outlet 15 into the external fluid circuit.
ピストンパルプ内蔵プレート７について第３図。FIG. 3 shows the piston pulp built-in plate 7.
第４図をも参照して詳述する。ピストンパルプ内蔵プレ
ート７は板体部７８と、板体部７８の外縁部に形成され
リプ７０１によって板体部７８と結合する円環状部分７
０と、板体部７８がら固定スクロール２側に突設し中間
圧力室７１と吐出室５とを画成するためのループした隔
壁７２と、板体部７２からリヤエンドプレート１２側に
突設スる複数の脚部７９．及び板体部７８のリヤエンド
プレート１２側に設けられ開閉弁機構６が配置される制
御室７４を形成した円柱部７７とから成っておシ、さら
に板体部７８には中間圧力室７１と制御室７４とを連通
ずる中間圧力室連通孔７０５が。This will be explained in detail with reference to FIG. The piston pulp built-in plate 7 includes a plate body part 78 and an annular part 7 formed at the outer edge of the plate body part 78 and connected to the plate body part 78 by a lip 701.
0, a looped partition 72 that protrudes from the plate body part 78 toward the fixed scroll 2 side and defines the intermediate pressure chamber 71 and the discharge chamber 5, and a looped partition wall 72 that protrudes from the plate body part 72 toward the rear end plate 12 side. A plurality of legs 79. and a columnar part 77 which is provided on the rear end plate 12 side of the plate body part 78 and forms a control chamber 74 in which the on-off valve mechanism 6 is arranged. An intermediate pressure chamber communication hole 705 communicates with the chamber 74.
隔壁７２には開口２５を介して吸入室４と制御室７４と
を連通ずる吸入室連通孔７０７がそれぞれ形成されてい
る。Suction chamber communication holes 707 are formed in the partition wall 72 to communicate the suction chamber 4 and the control chamber 74 through the openings 25, respectively.
上記してなるピストンパルプ内蔵プレート７は円環状部
分７０の外周面７３がハウジング１の側壁１３の内周面
に、隔壁７２が固定スクロール２の板体２１に１脚部７
９がリヤエンドプレート１２の内面よシ突設する凸部１
２１の先端面にそれぞれ当接するよう固定スクロール２
の板体２１とリヤエンドプレート１２との間に配設され
、ボルト９０によって固定スクロール２とともにリヤエ
ンドプレート１２上に固定されている。この固定はポル
ト９０の軸部を凸部１２１１脚部７９に穿設した孔に挿
通させた後、軸部先端を固定スクロール２の板体２１に
螺合することで行なわれる。そして隔壁７２はその内側
と外側とを中間圧力室７１と吐出室５とに画成している
。なお隔壁７２の端面の吸入室連通孔７０７の周囲にシ
ール部材７０８を配設して、吐出ガスが吸入室連通孔７
０７へ流入するのを防いでいる。In the above-described piston pulp built-in plate 7, the outer circumferential surface 73 of the annular portion 70 is attached to the inner circumferential surface of the side wall 13 of the housing 1, and the partition wall 72 is attached to the plate body 21 of the fixed scroll 2.
9 is a convex portion 1 protruding from the inner surface of the rear end plate 12;
The fixed scroll 2 is in contact with the end surface of the fixed scroll 21.
It is arranged between the plate body 21 and the rear end plate 12, and is fixed on the rear end plate 12 together with the fixed scroll 2 by bolts 90. This fixation is performed by inserting the shaft portion of the port 90 into a hole bored in the leg portion 79 of the convex portion 1211, and then screwing the tip of the shaft portion into the plate body 21 of the fixed scroll 2. The partition wall 72 defines an intermediate pressure chamber 71 and a discharge chamber 5 on its inside and outside. Note that a sealing member 708 is provided around the suction chamber communication hole 707 on the end face of the partition wall 72 so that the discharged gas can flow through the suction chamber communication hole 7.
This prevents it from flowing into 07.
開閉弁機構６は、第１図と第４図とを参照して。For the opening/closing valve mechanism 6, see FIGS. 1 and 4.
制御室７４の底部に支持されたシール材６１と。and a sealing material 61 supported at the bottom of the control chamber 74.
コノシール材上に支持されたコイルスプＩ）：／／”６
２と、このコイルスプリング６６で弾性支持されたピス
トンパルプ６３と、このピストンパルプ６３中に収容さ
れたベローズ弁６４と、ピストンパルプの上方で制御室
７４．を閉塞する円板６５とからなる。この円板６５は
、中央部にオリフィス６６を有し、このオリフィス６６
を通して、吐出ガスの圧力がピストンパルプ６３の上方
に加わるようになっている。Coil sprup supported on cono seal material I): //”6
2, a piston pulp 63 elastically supported by this coil spring 66, a bellows valve 64 accommodated in this piston pulp 63, and a control chamber 74 above the piston pulp. It consists of a disc 65 that closes off. This disk 65 has an orifice 66 in the center, and this orifice 66
Through this, the pressure of the discharged gas is applied above the piston pulp 63.
なお、ピストンパルプ６３は、側部に開口６３１とを有
し、吸入室連通孔７０７から導入する吸入圧がベローズ
６４に加わるようになっている。またビス←ンバルプ内
上方には、ベローズ６４が伸−長じたとき開放されるボ
ールパルプ６３２が設ケられている。The piston pulp 63 has an opening 631 on the side so that suction pressure introduced from the suction chamber communication hole 707 is applied to the bellows 64. Further, a ball pulp 632 is provided above the inside of the screw valve and is opened when the bellows 64 is extended.
今、吸入圧が高い状態で運転されていると、その圧力に
よシ、ベローズ６４が収縮している。この状態では、オ
リフィス６６から制御室７４内に加わる吐出圧のために
が−ルバルブ６３２が閉塞し、かつピストンバルブ６３
がコイルスプリンク６２の弾力に拡して押し下げられ、
ピストン・９ルプ６３の下部外周にシール材６１が当接
し、制御室７４と中間圧力室連通孔７０５との連通を阻
止する。従って、吸入室４と中間圧力室７１とは連通を
遮断された状態である。If the engine is currently being operated with a high suction pressure, the bellows 64 is contracting due to the pressure. In this state, the discharge pressure applied from the orifice 66 into the control chamber 74 closes the gas valve 632, and the piston valve 632 closes.
is expanded by the elasticity of the coil spring 62 and pushed down,
A sealing material 61 comes into contact with the lower outer periphery of the piston 9 loop 63 to prevent communication between the control chamber 74 and the intermediate pressure chamber communication hole 705 . Therefore, the communication between the suction chamber 4 and the intermediate pressure chamber 71 is cut off.
この状態では、圧縮機は最大圧縮容量で運転されている
。In this state, the compressor is operating at maximum compression capacity.
この状態で、吸入室４の圧力が低下すると、ベローズ６
４が伸長し初め、ビールバルブ６３２を開く。これによ
シ吐出ガスがピストンパルプ６３内を通って、開口６３
１から吸入室連通孔７０７の方へ逃げ、ピストンパルプ
上部に作用する圧力が低下する。これによシ、ピストン
ノ４ルプ６３がコイルスプリング６２の弾力で上方に動
き、゛ピストンバルブ６３の下部外周とシール材６１と
の間のシール作用がなくなシ、制御室７４と中間圧力室
連通孔７０５との間が連通ずる。この結果吸入室４と中
間圧力室７１とが連通し、中間圧力室７１の圧力が吸入
圧まで低下する。これによって、逆止弁７５が開き、流
体ポケットが、パイノ母ス孔２４を介して吸入室４と連
通ずる。この結果、この圧縮機は低圧縮容量の運転に切
替えられる。In this state, when the pressure in the suction chamber 4 decreases, the bellows 6
4 begins to extend and opens beer valve 632. As a result, the discharged gas passes through the piston pulp 63 and the opening 63
1 to the suction chamber communication hole 707, and the pressure acting on the upper part of the piston pulp decreases. As a result, the piston nozzle 63 moves upward due to the elasticity of the coil spring 62, and the sealing action between the lower outer periphery of the piston valve 63 and the sealing material 61 is eliminated, and the control chamber 74 and the intermediate pressure chamber communicate with each other. There is communication between the hole 705 and the hole 705 . As a result, the suction chamber 4 and the intermediate pressure chamber 71 communicate with each other, and the pressure in the intermediate pressure chamber 71 decreases to the suction pressure. As a result, the check valve 75 opens and the fluid pocket communicates with the suction chamber 4 via the pinot mother hole 24. As a result, the compressor is switched to low compression capacity operation.
以上のように２本発明によれば、吸入室と中間圧力室と
の連通をベローズ弁を内包したピストンパルプを有する
開閉弁機構によって、吸入室の圧力によって自動的に制
御して圧縮容量を切替えることができるとともに、中間
圧力室の形成および開閉弁機構の配置が開閉弁機構を予
め組込んだ板体とリヤエンドプレート内に配するだけで
達成できるので、容量可変型圧縮機の組立工数を大巾に
削減することができる。また、圧縮機のハウジングの軽
量化、製造の簡単化さらにはハウジングの共通化が図れ
、従来の固定容積型圧縮機の部品と大巾な部品の共通化
がはかれる。As described above, according to the present invention, the communication between the suction chamber and the intermediate pressure chamber is automatically controlled by the pressure in the suction chamber to switch the compression capacity by an on-off valve mechanism having a piston pulp containing a bellows valve. In addition, the formation of the intermediate pressure chamber and the arrangement of the on-off valve mechanism can be achieved by simply arranging the on-off valve mechanism in the plate body and the rear end plate, which have the on-off valve mechanism pre-assembled, thereby reducing the number of man-hours required for assembling the variable capacity compressor. can be reduced in width. In addition, the compressor housing can be made lighter, easier to manufacture, and can be made more common, and larger parts can be made more common with parts of conventional fixed displacement compressors.
以下余日Remaining days below
第１図は９本発明の一実施例を示した圧縮機の断面図、
第２図は第１図のＡ−１断面図、第３図は固定スクロー
ル背部の部品構成を示した分解斜視図、第４図は開閉弁
機構を示した分解図である。
１・・・圧縮機ノ・ウジング、２・・・固定スクロール
。
３・・・可動スクロール、４・・・吸入室、５・・・吐
出室。
６・・・開閉弁機構、７・・・ピストンバルブ内蔵プレ
ート、１１・・・フロントエンドプレート、１２・・・
リヤエンドプレート、１３・・・側壁、１５・・・排出
口。
２１・・・固定スクロールの板体、２２・・・（固定ス
クロール）のうず巻体、２３・・・吐出口、２４・・・
ノ々イパス孔、２５・・・開口、３１・・・（可動スク
ロール）の板体、３２・・・（可動スクロール）のうず
巻体。
７０・・・円環状部分、７１・・・中間圧力室、７２・
・・周壁、７４・・・制御室、７５・・・逆止弁、７８
・・・板体部。FIG. 1 is a sectional view of a compressor showing an embodiment of the present invention.
2 is a sectional view taken along the line A-1 in FIG. 1, FIG. 3 is an exploded perspective view showing the component configuration of the back of the fixed scroll, and FIG. 4 is an exploded view showing the on-off valve mechanism. 1... Compressor nozzle, 2... Fixed scroll. 3...Movable scroll, 4...Suction chamber, 5...Discharge chamber. 6... Opening/closing valve mechanism, 7... Piston valve built-in plate, 11... Front end plate, 12...
Rear end plate, 13... side wall, 15... discharge port. 21... Fixed scroll plate, 22... (fixed scroll) spiral body, 23... Discharge port, 24...
Nonoi pass hole, 25... opening, 31... (movable scroll) plate body, 32... (movable scroll) spiral body. 70... Annular portion, 71... Intermediate pressure chamber, 72...
... Peripheral wall, 74 ... Control room, 75 ... Check valve, 78
...Plate body part.
Claims (1)
と，板体の一面上にうず巻体を有し，前記ハウジングに
固定された固定スクロール部材と，板体の一面上にうず
巻体を有し，前記ハウジング内に貫挿された主軸の回転
によって円軌道上を運動する可動スクロール部材とを備
え，前記可動スクロール部材のうず巻体を固定スクロー
ル部材のうず巻体に角度をずらして噛み合い状態で重ね
合せて，前記２つのうず巻体の間に閉塞された流体ポケ
ットを形成し，前記可動スクロール部材をその回転を阻
止しながら円軌道運動を行なわせることによって，前記
流体吸入口に連通した吸入室から流体を流体ポケットに
吸入し，前記固定スクロール部材の板体の中心部に設け
た吐出口から吐出室を介して前記流体排出口へ圧縮流体
を排出するようにしたスクロール圧縮機において，前記
固定スクロール部材の板体のうず巻体外終端よりうず巻
に沿って内側に流体のバイパス孔が穿設されており，か
つ該流体バイパス孔の開閉を制御するために逆止弁が設
けられており，前記固定スクロール部材の板体の前記可
動スクロール部材とは反対側の面上に前記バイパス孔に
よって圧縮途中の流体ポケットと連通する中間圧力室を
形成するように板状部材が当接して配置され，該板状部
材は該中間圧力室と前記吸入室とを連通させる連通部を
有し，前記中間圧力室と吸入室との連通部に該吸入室の
圧力を感知して伸縮するベローズを内包する開閉弁機構
が設けられていることを特徴とする可変容量型スクロー
ル圧縮機。1. A housing having a fluid inlet and a fluid outlet, a spiral body on one surface of a plate, a fixed scroll member fixed to the housing, and a spiral body on one surface of the plate. , a movable scroll member that moves on a circular orbit by rotation of a main shaft inserted into the housing, and the spiral body of the movable scroll member is meshed with the spiral body of the fixed scroll member at a shifted angle. By overlapping the two spiral bodies to form a closed fluid pocket between the two spiral bodies and causing the movable scroll member to perform circular orbital motion while preventing its rotation, a suction communicating with the fluid suction port is formed. In the scroll compressor, fluid is sucked into the fluid pocket from the chamber, and compressed fluid is discharged from the discharge port provided in the center of the plate of the fixed scroll member to the fluid discharge port via the discharge chamber. A fluid bypass hole is bored inward from the outer end of the spiral body of the plate of the fixed scroll member along the spiral, and a check valve is provided to control opening and closing of the fluid bypass hole. , a plate-like member is disposed in contact with a surface of the plate of the fixed scroll member opposite to the movable scroll member so as to form an intermediate pressure chamber that communicates with the fluid pocket in the middle of compression through the bypass hole. , the plate-like member has a communication portion that communicates the intermediate pressure chamber and the suction chamber, and includes a bellows that expands and contracts by sensing the pressure of the suction chamber in the communication portion between the intermediate pressure chamber and the suction chamber. A variable capacity scroll compressor characterized by being provided with an on-off valve mechanism that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4408587A JPS63212789A (en) | 1987-02-28 | 1987-02-28 | Variable capacity type scroll compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4408587A JPS63212789A (en) | 1987-02-28 | 1987-02-28 | Variable capacity type scroll compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63212789A true JPS63212789A (en) | 1988-09-05 |
Family
ID=12681779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4408587A Pending JPS63212789A (en) | 1987-02-28 | 1987-02-28 | Variable capacity type scroll compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63212789A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4940395A (en) * | 1987-12-08 | 1990-07-10 | Sanden Corporation | Scroll type compressor with variable displacement mechanism |
| JPH04179886A (en) * | 1990-11-14 | 1992-06-26 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| JPH04179887A (en) * | 1990-11-14 | 1992-06-26 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| JPH04183985A (en) * | 1990-11-16 | 1992-06-30 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| JPH0476990U (en) * | 1990-11-16 | 1992-07-06 | ||
| US5192195A (en) * | 1990-11-14 | 1993-03-09 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type compressor with separate control block |
| US5336058A (en) * | 1992-02-18 | 1994-08-09 | Sanden Corporation | Scroll-type compressor with variable displacement mechanism |
| WO1998051930A1 (en) * | 1997-05-12 | 1998-11-19 | Matsushita Electric Industrial Co., Ltd. | Capacity control scroll compressor |
| US5860791A (en) * | 1995-06-26 | 1999-01-19 | Sanden Corporation | Scroll compressor with end-plate valve having a conical passage and a free sphere |
| US5873707A (en) * | 1994-11-29 | 1999-02-23 | Sanden Corporation | Fluid displacement apparatus with variable displacement mechanism |
| US5993171A (en) * | 1996-06-25 | 1999-11-30 | Sanden Corporation | Scroll-type compressor with variable displacement mechanism |
| US6379131B1 (en) | 1999-03-04 | 2002-04-30 | Sanden Corporation | Scroll type compressor |
| JP2002195176A (en) * | 2000-12-22 | 2002-07-10 | Nippon Soken Inc | Scroll compressor |
| US6884042B2 (en) * | 2003-06-26 | 2005-04-26 | Scroll Technologies | Two-step self-modulating scroll compressor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716292A (en) * | 1980-07-01 | 1982-01-27 | Sanden Corp | Scroll type compressor |
| JPS61291792A (en) * | 1985-06-18 | 1986-12-22 | Sanden Corp | Variable capacity scroll type compressor |
-
1987
- 1987-02-28 JP JP4408587A patent/JPS63212789A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716292A (en) * | 1980-07-01 | 1982-01-27 | Sanden Corp | Scroll type compressor |
| JPS61291792A (en) * | 1985-06-18 | 1986-12-22 | Sanden Corp | Variable capacity scroll type compressor |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4940395A (en) * | 1987-12-08 | 1990-07-10 | Sanden Corporation | Scroll type compressor with variable displacement mechanism |
| US5193987A (en) * | 1990-11-14 | 1993-03-16 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type compressor |
| JPH04179886A (en) * | 1990-11-14 | 1992-06-26 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| JPH04179887A (en) * | 1990-11-14 | 1992-06-26 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| AU639488B2 (en) * | 1990-11-14 | 1993-07-29 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type compressor |
| US5192195A (en) * | 1990-11-14 | 1993-03-09 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type compressor with separate control block |
| JPH04183985A (en) * | 1990-11-16 | 1992-06-30 | Mitsubishi Heavy Ind Ltd | Scroll type compressor |
| JPH0476990U (en) * | 1990-11-16 | 1992-07-06 | ||
| US5236316A (en) * | 1990-11-16 | 1993-08-17 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type compressor |
| US5336058A (en) * | 1992-02-18 | 1994-08-09 | Sanden Corporation | Scroll-type compressor with variable displacement mechanism |
| US5873707A (en) * | 1994-11-29 | 1999-02-23 | Sanden Corporation | Fluid displacement apparatus with variable displacement mechanism |
| US5860791A (en) * | 1995-06-26 | 1999-01-19 | Sanden Corporation | Scroll compressor with end-plate valve having a conical passage and a free sphere |
| US5993171A (en) * | 1996-06-25 | 1999-11-30 | Sanden Corporation | Scroll-type compressor with variable displacement mechanism |
| WO1998051930A1 (en) * | 1997-05-12 | 1998-11-19 | Matsushita Electric Industrial Co., Ltd. | Capacity control scroll compressor |
| US6428286B1 (en) | 1997-05-12 | 2002-08-06 | Matsushita Electric Industrial Co., Ltd. | Capacity control scroll compressor |
| US6379131B1 (en) | 1999-03-04 | 2002-04-30 | Sanden Corporation | Scroll type compressor |
| JP2002195176A (en) * | 2000-12-22 | 2002-07-10 | Nippon Soken Inc | Scroll compressor |
| JP4597358B2 (en) * | 2000-12-22 | 2010-12-15 | 株式会社日本自動車部品総合研究所 | Scroll compressor |
| US6884042B2 (en) * | 2003-06-26 | 2005-04-26 | Scroll Technologies | Two-step self-modulating scroll compressor |
| US6984114B2 (en) | 2003-06-26 | 2006-01-10 | Scroll Technologies | Two-step self-modulating scroll compressor |
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