JPH0381588A - Capacity control device for scroll type compressor - Google Patents
Capacity control device for scroll type compressorInfo
- Publication number
- JPH0381588A JPH0381588A JP21509489A JP21509489A JPH0381588A JP H0381588 A JPH0381588 A JP H0381588A JP 21509489 A JP21509489 A JP 21509489A JP 21509489 A JP21509489 A JP 21509489A JP H0381588 A JPH0381588 A JP H0381588A
- Authority
- JP
- Japan
- Prior art keywords
- scroll
- bypass
- fixed scroll
- wrap
- bypass holes
- 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
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 12
- 239000003921 oil Substances 0.000 description 8
- 238000004891 communication Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はスクロール圧縮機に係り、さらに、詳しくいえ
ば容量制御可能なスクロール圧縮機に関するもっである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scroll compressor, and more particularly to a scroll compressor whose capacity can be controlled.
スクロール圧ｍ機の容量制ｆ卸装置としては、例えば特
開昭１３４−４５９８７号、特開昭６４−４５９８８号
に記載されている。％開昭１５４−４１５９８７号では
、吐出室に開口する吐出口を中心位置に有する端板にう
ず巻き状Ｄ２ツブを直立吾せて形成した固定スクロール
と、端板に前記固定スクロールのうず巻き状ラップと実
質的に同一形状のうず巻き状ラップを直立させて形成し
た旋回スクロールとをかみ合わせ、前記両スクロールＤ
かみ合わされたうず巻き状ラッグＤ外局部に吸入室を形
成すると共に、旋回スクロールの自転を防止する手段と
、該旋回スクロールを自転することなく旋回運動させる
ための旋回スクロール駆動手段と、を備え、前記旋回ス
クロールＤ旋回運動中に該旋回スクロールＯうす巻き状
ラップと前記固定スクロールのうず巻き状ラップとの間
に対称的に形状される対をなす密閉室を遂次容積を減じ
ながら前記吐出口に向かって移動させ前記吸入室からの
吸入ガスを圧縮ガスとして前記吐出口から吐出させるよ
うにしたスクロール圧縮機にかいて、固定スクロールの
端板に吸入室に通じている一対Ｏバイパス穴を固定スク
ロールラップを介して設けることにより、密閉室と吸入
室を連通させ、前記各バイパス穴にピストンを設け、ビ
ス１フＤ作動により容量制御を行う。すなわち、ピスト
ンＯ背面に高圧ガスを導入することによりピストンは押
し下げられフルロード運転となり、低圧ガスを導入すれ
ば、ピストンは押し上げられ、密閉室は２ツブを介し、
吸入室と連通゛ｒることによりアンロード運転となる。A capacity control device for a scroll pressure machine is described in, for example, Japanese Patent Laid-Open Nos. 134-45987 and 64-45988. No. 154-415987 discloses a fixed scroll formed by having a spiral D2 knob standing upright on an end plate having a discharge port opening into a discharge chamber in the center position, and a spiral wrap of the fixed scroll on the end plate. The two scrolls D are engaged with an orbiting scroll formed by upright spiral wraps having substantially the same shape
A suction chamber is formed in the outer part of the engaged spiral-shaped lugs D, a means for preventing the orbiting scroll from rotating on its axis, and an orbiting scroll driving means for causing the orbiting scroll to orbit without rotating on its axis; During the orbiting motion of the orbiting scroll D, a pair of sealed chambers formed symmetrically between the thinly wound wrap of the orbiting scroll O and the spirally wound wrap of the fixed scroll are moved toward the discharge port while gradually decreasing their volume. The scroll compressor is configured to move suction gas from the suction chamber as compressed gas and discharge it from the discharge port, and a pair of O bypass holes communicating with the suction chamber are provided in the end plate of the fixed scroll. The closed chamber and the suction chamber are communicated with each other by providing a piston in each of the bypass holes, and the capacity is controlled by operating the screw 1F. That is, by introducing high-pressure gas to the back of the piston O, the piston is pushed down and becomes full-load operation, and when low-pressure gas is introduced, the piston is pushed up, and the sealed chamber is opened through the two knobs.
Unload operation is performed by communicating with the suction chamber.
又、特開昭６４−４５９８８号では、開閉弁を閉じるこ
とによりフルロード運転となり、開閉弁を開くと密閉室
はバイパス管を介し吸入室と連通ずることによりアンロ
ード運転となる。Further, in Japanese Patent Application Laid-open No. 64-45988, full load operation is achieved by closing the on-off valve, and unload operation is achieved by opening the on-off valve and the closed chamber is communicated with the suction chamber via a bypass pipe.
しかし上記Ｏ構造では次の問題がある。 However, the above O structure has the following problem.
すなわち前者は、アンロード運転時、作動ガスはスプリ
ングの力に打ちかって固定スクロールのラップ間をバイ
パスする訳であるが、バイパスにより密閉室内の圧力は
吸入圧力に近づき、この場合、スプリングの力によりピ
ストンは下へ押し下げられようとするため、効率良くバ
イパス出来ず、又、損失も大きい。In other words, in the former case, during unloading operation, the working gas bypasses between the wraps of the fixed scroll due to the force of the spring, but due to the bypass, the pressure in the sealed chamber approaches the suction pressure, and in this case, due to the force of the spring, the pressure inside the sealed chamber approaches the suction pressure. Since the piston tries to be pushed down, it cannot be bypassed efficiently and losses are also large.
又、固定スクロールＤラップ外線巻き終り点が吸入密閉
室が最大容積となるところ、又はそれより少し大きいと
ころまで０９す巻き形状の場合、（第２図に示すような
固定スクロール形状）密閉室とラップを介し吸入室と連
通ずる一対つバイパス穴の配設は出来ない。In addition, if the fixed scroll has a helical shape, where the end point of the outer wire winding of the D-wrap reaches the maximum capacity of the suction sealed chamber, or a point slightly larger than that, (fixed scroll shape as shown in Figure 2), the sealed chamber and It is not possible to provide a pair of bypass holes that communicate with the suction chamber through the wrap.
又、後者は、フルロード運転時、バイパス管内中り作動
ガスの再膨張による干渉があり、こＤため体積効率Ｑ低
下による能力域、又、作＠空間の温度上昇による吐出ガ
ス温度上昇、モータ巻線温度の上昇等の問題がある。In addition, during full-load operation, the latter causes interference due to re-expansion of the working gas in the bypass pipe, which reduces the capacity range due to a decrease in the volumetric efficiency Q, and increases the discharge gas temperature due to the temperature rise in the working space. There are problems such as an increase in winding temperature.
本発明の目的は、前述り従来の容量制御スクロール圧縮
機に嘔ける諸種・Ｄ問題点、特に無駄な損失という問題
点を解決すべくなされたもＤである。又、本発明のよう
な固定スクロール形状でも容量′１１ＴＩ１１卸出来る
スクロール圧縮機を提供することにある。The object of the present invention is to solve the various problems encountered with the conventional capacity control scroll compressor, particularly the problem of unnecessary loss. Another object of the present invention is to provide a scroll compressor which can have a capacity of '11TI11 even with a fixed scroll shape like the present invention.
〔課題を解決するためＤ手段〕
上記目的を達成するために、吐出室に開口する吐出口を
中心位置近傍に有する端板にうず巻き状Ｄラッグを直立
させて形状した固定スクロールと、端板に前記固定スク
ロールＯうす巻き状ラップと同一曲線のうず巻き状ラッ
プを直立させて形戊した旋回スクロールとをかみ合わせ
、前記両スクロールのかみ合わされたうず巻き状ラップ
Ｄ外周部に吸入室を形成すると共に、旋回スクロールＤ
自転を防止する手段ど、該旋回スクロールを自転するこ
となく旋回運動させるための旋回スクロール駆動手段と
、を備え、前記旋回スクロールＤ旋回運動中に該旋回ス
クロールのうず巻き状ラップと前記固定スクロールのう
ず巻き状ラップとの間に対称的に形成される対をなす密
閉室を遂次容積を減じながら前記吐出口に同、１Ｊ）っ
てＳ動させ、前記吸入室からＤ吸入ガスを圧縮ガスとし
て前記吐出口から吐出させるようにしたスクロール圧縮
機において、
前記密閉室が最大容積となる旋回スクロールＤ旋回角度
からアンロード運転に見合った所定の旋回角度だけ進ん
だ旋回位置にかいて、
前記対をなす各密閉室に対して、旋回スクロールの旋回
運動により同時に閉じ終わるような一対のバイパス穴で
あって、一方つバイパス穴は固定スクロールラップを介
して連通ずる単一あるいは複数個Ｏバイパス穴を設け、
他方は、固定スクロールラップ溝間に単一あるいは被数
個のバイパス穴を設ける。[Means D to solve the problem] In order to achieve the above object, a fixed scroll having a spiral D lug upright on an end plate having a discharge port opening into a discharge chamber near the center position, and a fixed scroll on the end plate are provided. The thinly wound wrap of the fixed scroll O and an orbiting scroll formed by standing upright a spirally shaped wrap having the same curve are engaged with each other, and a suction chamber is formed on the outer periphery of the spirally shaped wrap D that is engaged with both scrolls, and the spiral wrap is rotated. scroll D
means for preventing rotation, and an orbiting scroll drive means for causing the orbiting scroll to orbit without rotating, and the spiral wrap of the orbiting scroll and the spiral of the fixed scroll are provided during the orbiting movement of the orbiting scroll D. A pair of sealed chambers formed symmetrically between the two wraps are moved to the discharge port by 1J) while successively reducing their volumes, and the suction gas from the suction chamber is converted into compressed gas and the In a scroll compressor configured to discharge from a discharge port, the pair of scrolls are moved from the orbiting angle of the orbiting scroll D at which the closed chamber has a maximum volume to a orbiting position that is advanced by a predetermined orbiting angle commensurate with unloading operation. A pair of bypass holes are provided for each sealed chamber, the bypass holes being closed simultaneously by the orbiting motion of the orbiting scroll, and one bypass hole is provided with a single or plural O bypass holes communicating through a fixed scroll wrap;
On the other hand, a single or multiple bypass holes are provided between the fixed scroll wrap grooves.
これら一対のバイパス穴を同時に開閉するためＤ制御弁
を設け、これら制御弁の背面に、該制御弁の開閉動作用
の圧力を作用させるための圧力等入路を設けたもっであ
る。D control valves are provided to simultaneously open and close these pair of bypass holes, and pressure inlets are provided on the back surfaces of these control valves to apply pressure for opening and closing the control valves.
上記構成に成る本発明υスクロール圧縮機にかいては、
そＯ対をなす一対つバイパス穴を、同時に開閉する制御
弁Ｌ０１）閉状態にて全負荷運転（フルロード運転）を
行い、又、該制御弁り開状態にて容量制御運転（アンロ
ード運転）を行う。さらに、対称的に対をなすバイパス
穴を介する連通通路がそれぞれの制御弁により同時に閉
状態もしくは開状態にされるので対をなｒ密閉空間の不
都合な圧力差、ひいてはそれによる荷重Ｄアンバランス
を生ずることもない。Regarding the υ scroll compressor of the present invention having the above configuration,
Full-load operation is performed with the control valve L01 (which opens and closes the pair of bypass holes at the same time) closed, and capacity control operation (unload operation) is performed with the control valve open. )I do. Furthermore, since the communication passages via the symmetrical pairs of bypass holes are closed or opened at the same time by their respective control valves, the undesirable pressure difference between the pair and the closed space, and the resulting load D imbalance, can be reduced. It never happens.
〔実施例」 以下本発明の実施例に基づいて説明する。〔Example" The present invention will be explained below based on examples.
第１図は本発明を実施した密閉形スクロール圧縮＠Ｖ全
体構造析面図を示す。FIG. 1 shows an analytical view of the entire structure of a closed scroll compressor @V in which the present invention is implemented.
第１図において、密閉容器ｌ内り上方には圧縮機部２が
、下方には電動機８がそれぞれ配設されまた密閉容器１
の底部には潤滑の油溜り４が形成されている。前記圧縮
機部２は、合板上にうず巻状Ｄノツプ５ａを有する固定
スクロール５と、同じく台板上にうず巻状Ｄラップ６ａ
を有する旋回スクロール６と、固定スクロール５と一体
化され、旋回スクロール６を支持するフレーム７とを具
え、固定スクロール５釦よび旋回スクロール６のラップ
同志を噛合せた構成となっている。In FIG. 1, a compressor section 2 is disposed above and an electric motor 8 is disposed below inside the closed vessel 1.
An oil reservoir 4 for lubrication is formed at the bottom. The compressor section 2 includes a fixed scroll 5 having a spiral D-knot 5a on a plywood board, and a spiral D-wrap 6a on a base plate.
The frame 7 is integrated with the fixed scroll 5 and supports the orbiting scroll 6, and the buttons of the fixed scroll 5 and the wraps of the orbiting scroll 6 are engaged with each other.
また旋回スクロール６とフレーム７との間には、旋回ス
クロール６の自転を防止するオルダム機構８が設けられ
ている。前記電動機８は密閉容器ｌに圧入締結され、ク
ランク軸９を介して旋回スクロール６を旋回運動させる
ようになっている。Further, an Oldham mechanism 8 is provided between the orbiting scroll 6 and the frame 7 to prevent the orbiting scroll 6 from rotating. The electric motor 8 is press-fitted into the closed container 1 and rotates the orbiting scroll 6 via the crankshaft 9.
り２ンク軸９はフレーム７に設けた主軸受ｌＯと下部軸
受１１とで支持され、そＱり２ンクビンは旋回スクロー
ル６の背板に設けた旋回軸受１２と嵌合されている。The two-way link shaft 9 is supported by a main bearing lO provided on the frame 7 and a lower bearing 11, and the two-way link shaft 9 is fitted with an orbiting bearing 12 provided on the back plate of the orbiting scroll 6.
クランク軸９内には主軸受１０、下部軸受１１および旋
回軸受１２へ潤滑油を導く給油通路１８が設けられ、か
つ電！ｔｉＩ機ＢｃＩ軸端には油溜１１）４０潤滑油を
吸い上げて前記給油通路１８へ送り込む給油装置１４が
設けられている。An oil supply passage 18 is provided in the crankshaft 9 to guide lubricating oil to the main bearing 10, lower bearing 11, and slewing bearing 12. An oil supply device 14 for sucking up lubricating oil from an oil reservoir 11) 40 and feeding it into the oil supply passage 18 is provided at the end of the BcI shaft of the tiI machine.
前記の圧縮機部２は、旋回スクロール０が電動機８で駆
動されるクランク軸９を介して旋回運動せしめられると
、旋回スクロール６、固定スクロール５により形成され
る空間（圧縮室）がスクロール中心方向に移動するに従
って容積を減少して、吸入した冷媒ガスを圧縮する。圧
縮された冷媒ガスは固定スクロール０台板の中央に設け
られた吐出口１６から密閉容器内の上部空間１７へ吐出
される。In the compressor section 2, when the orbiting scroll 0 is rotated via a crankshaft 9 driven by an electric motor 8, a space (compression chamber) formed by the orbiting scroll 6 and the fixed scroll 5 moves toward the center of the scroll. The volume decreases as the refrigerant gas moves to compress the sucked refrigerant gas. The compressed refrigerant gas is discharged from a discharge port 16 provided at the center of the fixed scroll base plate to an upper space 17 within the closed container.
また、旋回スクロールの背面には、圧縮行程のガスを導
かれる中間圧室１５が決或さ！している。Also, on the back of the orbiting scroll, there is an intermediate pressure chamber 15 into which gas for the compression stroke is guided! are doing.
中間圧室１５７）圧力は冷媒ガスＤ吸入圧力と吐出圧力
の中間の圧力であり、スクロールＤ摺動部への給油は、
吐出圧力と中間室圧力り差圧を利用して行われる。潤滑
油は給油装置１４より給油通路１Ｂを通り、主軸受ｌＯ
１下部軸受１１、釦よび旋回軸受１２を潤滑した後、中
間圧室１５を経て圧ｍ室に流入し、冷媒ガスと混合した
状態で固定スクロール５θ中夫に設けた吐出口１６より
密閉容器ｌ内の上部空間１７へ吐出する。The pressure in the intermediate pressure chamber 157) is between the suction pressure and the discharge pressure of the refrigerant gas D, and the oil supply to the sliding part of the scroll D is as follows.
This is done using the differential pressure between the discharge pressure and the intermediate chamber pressure. The lubricating oil passes through the oil supply passage 1B from the oil supply device 14 and is delivered to the main bearing lO.
1. After lubricating the lower bearing 11, the button, and the swing bearing 12, it flows into the pressure chamber through the intermediate pressure chamber 15 and is mixed with refrigerant gas through the discharge port 16 provided in the fixed scroll 5θ central shaft into the sealed container l. It is discharged into the upper space 17 inside.
フレーム７と密閉容器ｌの内側壁との間には、フンーム
７Ｄ外局部に軸方向（上下方向）Ｋ延びる溝１８を設け
ることによって、前記り上部空間１７中の冷媒ガスを圧
縮機部２０下刃Ｏ空間へ導くためＯ冷媒通路１８が設け
られている。A groove 18 extending in the axial direction (vertical direction) K is provided between the frame 7 and the inner wall of the airtight container l in the outer part of the humidifier 7D, thereby directing the refrigerant gas in the upper space 17 to the bottom of the compressor section 20. An O refrigerant passage 18 is provided to lead to the blade O space.
第１図中、２０は密閉容器１を貫通して、密閉容器１１
７）外部から圧縮機部２Ｑ吸入側に冷媒ガスを導びくた
めＯ吸入管である。２１は密閉容器１内の圧縮機部２と
電ＩＪＪ機８との間の空間に接続された吐出管であり、
この吐出管から圧縮された冷媒ガスが密閉容器１０外部
へ流出する。In FIG. 1, 20 penetrates the airtight container 1 and the airtight container 11
7) This is an O suction pipe for guiding refrigerant gas from the outside to the suction side of the compressor section 2Q. 21 is a discharge pipe connected to the space between the compressor section 2 and the electric IJJ machine 8 in the closed container 1;
Compressed refrigerant gas flows out of the closed container 10 from this discharge pipe.
さらに、本実施例に訃いては、第１図、第２図に示すよ
うに、固定スクロール５０台板上には、一対のバイパス
穴５ ｂ ＋ ５ ｂ’ Ｈ５Ｃ＋ ５ ” カ設’ｊ
られている。これらのバイパス穴は、密閉室が最大容積
となる旋回スクロールの旋回角度からアンロード運転に
見合った所定り旋回角度だけ進んだ旋回位置にかいて、
前記対をなす各密閉室に対して、旋回スクロールＤ旋回
運動により同時に閉じ終わるような一対Ｏバイパス穴で
あって、一方のバイパス穴５ｂ、５ｂ／は固定スクロー
ルラップ５ａを介して設け、他方Ｏバイパス穴５ ｃ＋
５ ｃ′は固定スクロール溝間に設けられている。Furthermore, according to this embodiment, as shown in FIGS. 1 and 2, a pair of bypass holes 5b+5b'H5C+5" are provided on the base plate of the fixed scroll 50.
It is being These bypass holes are placed at a rotation position that is a predetermined rotation angle commensurate with unloading operation from the rotation angle of the orbiting scroll where the closed chamber has the maximum volume.
For each of the pair of sealed chambers, there is a pair of O bypass holes which are closed simultaneously by the orbiting motion of the orbiting scroll D, one bypass hole 5b, 5b/ is provided through the fixed scroll wrap 5a, and the other O bypass hole is provided through the fixed scroll wrap 5a. Bypass hole 5 c+
5c' is provided between the fixed scroll grooves.
又、バイパス穴５ｂ’＋５Ｇ’ハバイパス穴５ｂ、５Ｃ
からそれぞれ２πジシアン（はぼ２πラジアンでも可）
進んだ線上に投けられている。Also, bypass hole 5b'+5G' bypass hole 5b, 5C
2π dicians (or 2π radians)
It is being thrown on an advanced line.
又、第８図には、本発明の実施例の部分図（バイパス穴
５ｂ、５ｂ／部は（ａ）図、バイパス穴５ｃ。Further, FIG. 8 is a partial view of the embodiment of the present invention (bypass holes 5b, 5b/part is shown in FIG. 8A, bypass hole 5c is shown).
５ ｃ／部は０）図に示す。）を示すが、バイパス穴５
ｂ、５ｂ’または５ＣＩ５Ｇ’をそれぞれ連通するため
Ｑ穴５ｄを設け、この穴５ｄ内に、バイパス穴５ｂ、５
ｂ’ｊ？よび５ＣＩ５Ｇ’を同時に開閉するための制御
卸弁２２、スプリング２８を設けると共に、制御弁２２
．７）ｄ作用の作動圧力流体を制御弁２２．、ｉ）背面
に作用させるため０４３通路管２４を設け、開閉弁２５
．２６を介し吸入側、吐出側にそれぞれ結ばれている。5 c/part is 0) as shown in the figure. ), but bypass hole 5
A Q hole 5d is provided to communicate with each other, and bypass holes 5b and 5 are provided in this hole 5d.
b'j? In addition to providing a control valve 22 and a spring 28 for simultaneously opening and closing 5CI5G' and 5CI5G', the control valve 22
．． 7) The operating pressure fluid of the d action is controlled by the control valve 22. , i) A 043 passage pipe 24 is provided to act on the back surface, and an on-off valve 25 is provided.
．． 26 to the suction side and the discharge side, respectively.
又、他Ｖ芙施例を第４図に示す。Further, another V embodiment is shown in FIG.
一方ｏバイパス穴５ｅ、５ｅ′は固定スクロールラップ
５ａを介して複数個設け、他方のバイパス穴５ｆは固定
スクロール溝間に単一般けられている。On the other hand, a plurality of O bypass holes 5e and 5e' are provided through the fixed scroll wrap 5a, and the other bypass hole 5f is provided with a single hole between the fixed scroll grooves.
第５図に第４図に訃けるバイパス穴部の部分拡大−（バ
イパス穴５ｅ＋５”部は（ａ）図、バイパス穴５ｆ部は
（ｂ）図に示す。）に示すが、前記第８図での説明同様
、バイパス穴５ｅ１５ｅ’また５ｆは穴５ｇを設け、こ
の穴５ｇ内にバイパス穴５ｅ。FIG. 5 shows a partial enlargement of the bypass hole portion shown in FIG. As in the explanation above, the bypass hole 5e15e' or 5f is provided with a hole 5g, and the bypass hole 5e is provided within this hole 5g.
５ｅ’＞よび５ｆを同時に開閉するための制御弁２２、
スプリング２８釦よび２８′を設けると共に、制御弁２
２．ｉ２）動作用の作動圧力流体を制御弁２２の背直に
作用させるためのガス通路ｖ２４を設け、開閉弁２５．
２６を介し吸入側、吐出側にそれぞれ結ばれている。a control valve 22 for simultaneously opening and closing 5e'> and 5f;
In addition to providing springs 28 and 28', the control valve 2
2. i2) A gas passage v24 is provided for applying a working pressure fluid for operation directly to the back of the control valve 22, and the on-off valve 25.
26 to the suction side and the discharge side, respectively.
１８− 次に動作について説明する。18- Next, the operation will be explained.
フルロード運転（全負荷運転）時には、吸入側と結ばれ
た開閉弁２５は閉じて分き、吐出側と結ばれた開閉弁ｚ
６は開いて釦く。こうすることにより１ｌｌｌＪ＠弁２
２０−Ｉ！面には、吐出圧力流体が作用するため、制御
弁はバイパス大側に押し下げられた状態となる。すなわ
ち、それぞれのバイパス穴５ｂと５１）’、５Ｇと５
ｃ′は連通されていない状態となる。これにより、圧縮
機はフルロード運転状態となる。すなわら、′奄拗機８
によりクシンク軸９を介して旋回スクロールが旋回運動
すると、吸入管２０から吸入された冷媒ガスは固定スク
ロール５と旋回スクロール６とつ作用で圧縮された後、
固定スクロール５Ｄ中夫に設けられた吐出口１６から、
密閉容器１の上部空間１７に吐出される。こυ吐出され
た冷媒ガスは、フレーム７に設けた通路１８を通って圧
７陥機部の下方Ｏ空間、すなわち、フレーム７と電＃機
８と０間つ空間に流入し、吐出管２１から密閉容器ｌυ
外に流出する。During full load operation (full load operation), the on-off valve 25 connected to the suction side is closed and separated, and the on-off valve z connected to the discharge side is closed.
6 opens and presses the button. By doing this, 1llllJ@valve 2
20-I! Since the discharge pressure fluid acts on the surface, the control valve is pushed down to the large bypass side. That is, the respective bypass holes 5b and 51)', 5G and 5
c' becomes uncommunicated. This puts the compressor into full load operation. In other words, 'Azukuki 8
When the orbiting scroll orbits through the sink shaft 9, the refrigerant gas sucked from the suction pipe 20 is compressed by the action of the fixed scroll 5 and the orbiting scroll 6, and then
From the discharge port 16 provided in the fixed scroll 5D,
It is discharged into the upper space 17 of the closed container 1. The discharged refrigerant gas passes through the passage 18 provided in the frame 7 and flows into the space below the pressure 7 machine part, that is, the space between the frame 7 and the electric machine 8, and flows into the discharge pipe 21. airtight container lυ
leak outside.
他方、アンロード運転の場合には、開閉弁２５１４−
を開き、開閉弁２６を閉じることにより、制御弁２２の
背崩に吸入圧力流体を導入させ、スプリング２８の力と
密閉室内のガス圧とにより、制御弁２２は押し上げられ
た状態となる。すなわちバイパス穴５ｂと５”＋５ｃと
５ ｃ ／は連通された状態となる。これにより圧縮機
はアンロード運転となる。On the other hand, in the case of unload operation, by opening the on-off valve 2514- and closing the on-off valve 26, suction pressure fluid is introduced into the back collapse of the control valve 22, and the force of the spring 28 and the gas pressure in the sealed chamber are reduced. As a result, the control valve 22 is pushed up. In other words, the bypass holes 5b, 5"+5c, and 5c/ are in communication with each other. As a result, the compressor enters an unload operation.
従がって密閉室の冷媒ガスは、バイパス穴５ｂから５ｂ
′へ、又、５ｃから５ｃ／ヘバイパスされアンロード運
転となる。Therefore, the refrigerant gas in the sealed chamber flows through the bypass holes 5b to 5b.
', and from 5c to 5c/, resulting in unload operation.
また、制御弁２２．Ｄ上げ又は下げは、前記対をなす制
御弁のいずれについても同時に行うものである。In addition, the control valve 22. D raising or lowering is performed simultaneously for both of the pair of control valves.
また、第４図、第５図に示す他の実施例に釦いても、前
述と同様り動作である。Further, even if the button is pressed in other embodiments shown in FIGS. 4 and 5, the operation is similar to that described above.
第６図、第７図釦よび第８図に夫々他の実施例を示す。Other embodiments are shown in FIG. 6, FIG. 7, and FIG. 8, respectively.
第６図に釦いては、開閉弁２６を開くことにより制御弁
２２Ｃ）ｆ面には吐出圧力流体が作用し制御弁２２は押
しｆげられフルロード運転状態とな＝１５−
る。又、開閉弁２６を閉とすると、制御弁２２．Ｄ背面
に作用していた吐出圧力流体は、バイパス穴５ｂｔ ５
” ＋ ５Ｃ＋ ５ｃ／より少しづつ洩れ、ひいてわ、
制御弁２２の背面り作動圧力流体は減少し、スプリング
２８Ｃ１力が上まわった時、制御弁２２は押し上げられ
、アンロード運転状態となる第７図においては、開閉弁
２５を開くことにより制御弁２２の背直には吸入圧力流
体が作用し制御弁２２はスプリング２８の力により押し
上げられ、アンロード運転状態となる。又、開閉弁２５
を閉とすると、制御弁２２の背面には上部空間１７に開
口する絞り部位２７（キャピラリー等でも可）より、吐
出圧力流体を作用させ、これにより制御弁２２を押し下
げフルロード運転状態となる第８図の実施例は制御弁２
２２）背面の空間は、上部空間１７と細孔２８を介して
連通されているしたがって、
圧縮機起動時、
圧縮作動室の圧力
１６−
は吸入室にバイパスする。そつ後、上部空間１７の圧力
上昇に伴ない、制御弁２２Ｃ）背面には吐出圧力流体が
作用し、制御弁は押し下げられ、フルロード運転となる
。このため、起動時Ｏ負荷低減を図ることが出来る。As shown in FIG. 6, when the on-off valve 26 is opened, the discharge pressure fluid acts on the control valve 22C), and the control valve 22 is pushed up, resulting in a full load operating state. Furthermore, when the on-off valve 26 is closed, the control valve 22. The discharge pressure fluid that was acting on the back side of D is transferred to the bypass hole 5bt 5
” + 5C + 5c/ leaks little by little,
When the rear operating pressure fluid of the control valve 22 decreases and the force of the spring 28C1 increases, the control valve 22 is pushed up, and as shown in FIG. Suction pressure fluid acts on the back of the control valve 22, and the control valve 22 is pushed up by the force of the spring 28, resulting in an unload operation state. Also, on-off valve 25
When the control valve 22 is closed, a discharge pressure fluid is applied to the rear side of the control valve 22 from a constriction part 27 (which may be a capillary or the like) that opens into the upper space 17, and this pushes down the control valve 22 and enters the full-load operation state. The embodiment shown in Figure 8 is the control valve 2.
22) The back space is communicated with the upper space 17 through the pore 28. Therefore, when the compressor is started, the pressure 16- in the compression working chamber is bypassed to the suction chamber. After that, as the pressure in the upper space 17 increases, the discharge pressure fluid acts on the back surface of the control valve 22C, and the control valve is pushed down, resulting in full load operation. Therefore, it is possible to reduce the O load at startup.
以上述べたように、本発明のスクロール圧縮機に分いて
は、そＯ対をなすバイパス穴中Ｑ制御弁を閉状態また開
状態とすることにより、フルロード運転分よびアンロー
ド運転のいずれも行え、ノルロード運転時の作動ガスつ
再膨張による干渉も少なく、アンロード運転時２）制御
弁り作動も確実に行え、作動ガスの損失も少なく、無駄
な損失を招くことはない。As described above, in the scroll compressor of the present invention, both the full load operation and the unload operation can be controlled by closing and opening the Q control valve in the bypass hole that forms the O pair. There is little interference due to re-expansion of the working gas during nor-load operation, and 2) control valve operation can be performed reliably during unload operation, with little loss of working gas and no unnecessary loss.
また、対称的に対をなすバイパス穴を介して連通通路が
それぞれの制御弁により同時に閉状態もしくは開状態に
されるので対をなす密閉空間り不都合な圧力差、ひいて
はそれによる荷重のアンバ２ンスを生じることもない。In addition, since the communication passages are closed or opened at the same time by the respective control valves via the symmetrical pairs of bypass holes, the pair of closed spaces is created, resulting in an undesirable pressure difference and resulting load imbalance. It does not occur.
第１図は本発明の一実施例り密閉形スクロール圧縮機り
縦断筒口。
第２図は固定・旋回周スクロールＱ噛み合わせ部の平頂
断面図で（ａ）図、（ｂ）図は旋回スクロールの位相の
異なる図である。
第８図は第１図の実施例Ｑ制御弁部分り断面図で（ａ）
図、Φ）図は夫々つバイパス穴部分を示す。
第４図は他の実施例の固定・旋回両スクロールの噛み合
わせ部り平面断喬図で（ａ）図、Φ）図は旋回スクロー
ルの位相の異なる図である。
第５図は第１図に釦ける制御弁部分Ｏ断面図で（ａ）図
、（ｂ）図は夫々Ｄバイパス穴部分を示す。
第６図、第７図、第８図は、夫々他の実施例を示す密閉
形スクロール圧縮機り縦断面図である。
１・・・密閉容器 ２・・・圧縮機部 ５・・・固
定スクｏ−ル５ａ ・−ラッグ ５ｂ＋５ｂ’＋５ｃ
＋５” ＋ ５ｅ、５ｅ／ ＋５ ｆ”・バイパス穴
５ｄ。
５ｇ・・・穴 ６・・・旋回スクロール ２２・・
・制御弁 ２８．２８’・・・スプリング ２４・
・・ガス通路管 ２５．２６・・・開閉弁 ２７・
・・絞り部位２８・・・細孔。
−１９−
は２ビFIG. 1 shows a longitudinal section of a closed scroll compressor according to an embodiment of the present invention. FIG. 2 is a flat-top sectional view of the fixed/orbiting scroll Q meshing part, and (a) and (b) are diagrams showing different phases of the orbiting scroll. Figure 8 is a partial cross-sectional view of the embodiment Q control valve in Figure 1 (a).
Figures 1 and Φ) each show the bypass hole. FIG. 4 is a cross-sectional plan view of the meshing portion of both fixed and orbiting scrolls of another embodiment, and (a) and (Φ) are diagrams showing different phases of the orbiting scroll. FIG. 5 is a sectional view of the control valve part O shown in FIG. 1, and FIG. FIG. 6, FIG. 7, and FIG. 8 are longitudinal sectional views of a hermetic scroll compressor showing other embodiments, respectively. 1... Airtight container 2... Compressor section 5... Fixed scroll 5a - Lug 5b+5b'+5c
+5” +5e, 5e/+5 f”・Bypass hole
5d. 5g...hole 6...orbiting scroll 22...
・Control valve 28.28'...Spring 24・
...Gas passage pipe 25.26...Opening/closing valve 27.
... Squeezed part 28... Pore. -19- is 2 bits
Claims (1)
板にうず巻き状のラップを直立させて形成した固定スク
ロールと、端板に前記固定スクロールのうず巻き状ラッ
プと同一曲線のうず巻き状ラップを直立させて形成した
旋回スクロールとをかみ合わせ、前記両スクロールのか
み合わされたうず巻き状ラップの外周部に吸入室を形成
すると共に、旋回スクロールの自転を防止する手段と、
該旋回スクロールを自転することなく旋回運動させるた
めの旋回スクロール駆動手段と、を備え、前記旋回スク
ロールの旋回運動中に該旋回スクロールのうず巻き状ラ
ップと前記固定スクロールのうず巻き状ラップとの間に
対称的に形成される対をなす密閉室を遂次容積を減じな
がら前記吐出口に向かって移動させ前記吸入室からの吸
入ガスを圧縮ガスとして前記吐出口から吐出させるよう
にしたスクロール圧縮機において、 前記密閉室が最大容積となる旋回スクロールの旋回角度
からアンロード運転に見合った所定の旋回角度だけ進ん
だ旋回位置において、 前記対をなす各密閉室に対して、旋回スクロールの旋回
運動により同時に閉じ終わるような一対のバイパス穴で
あって、一方のバイパス穴は固定スクロールラップを介
して連通する単一あるいは複数個のバイパス穴を設け、
他方は、固定スクロールラップ溝間に単一あるいは複数
個のバイパス穴を設ける。 これら一対のバイパス穴を同時に開閉するための制御弁
を設け、これら制御弁の背面に、該制御弁の開閉動作用
の圧力を作用させるための圧力導入路を設けたことを特
徴とするスクロール圧縮機。 ２、制御弁と固定スクロール台座間にスプリングを配設
したことを特徴とする特許請求の範囲第一項記載のスク
ロール圧縮機。 ３、固定スクロールラップを介して連通する複数個のバ
イパス穴、又、固定スクロールラップ溝間に設けた複数
個のバイパス穴において、吐出口に近い方を第１のバイ
パス穴、他方を第２のバイパス穴とすると、第２のバイ
パス穴は第１のバイパス穴から２πラジアン、又はほぼ
２πラジアン進んだ線上にあり、そのバイパス穴距離は
互いに同一あるいは、ほぼ同一の一対のバイパス穴であ
ることを特徴とする特許請求第一項記載のスクロール圧
縮機。[Scope of Claims] 1. A fixed scroll in which a spiral wrap is formed upright on an end plate having a discharge port opening into a discharge chamber near the center position, and a spiral wrap on the end plate that is the same as the spiral wrap of the fixed scroll. Means for engaging an orbiting scroll formed by standing upright curved spiral wraps, forming a suction chamber at the outer periphery of the engaged spiral wrap, and preventing rotation of the orbiting scroll;
an orbiting scroll driving means for causing the orbiting scroll to orbit without rotating; the spiral wrap of the orbiting scroll is symmetrical between the spiral wrap of the orbiting scroll and the spiral wrap of the fixed scroll during the orbiting movement of the orbiting scroll. A scroll compressor in which a pair of sealed chambers formed in a vacuum are moved toward the discharge port while successively reducing the volume, and suction gas from the suction chamber is discharged from the discharge port as compressed gas, At a rotating position where the sealed chamber has advanced by a predetermined rotating angle commensurate with the unloading operation from the rotating angle of the rotating scroll at which the sealed chamber has a maximum volume, each sealed chamber of the pair is simultaneously closed by the rotating movement of the rotating scroll. a pair of bypass holes such that one bypass hole terminates in the other, one bypass hole having a single or plural bypass holes communicating through a fixed scroll wrap;
On the other hand, single or multiple bypass holes are provided between the fixed scroll wrap grooves. Scroll compression characterized in that control valves are provided for simultaneously opening and closing these pair of bypass holes, and a pressure introduction path is provided on the back surface of these control valves for applying pressure for opening and closing operations of the control valves. Machine. 2. The scroll compressor according to claim 1, characterized in that a spring is disposed between the control valve and the fixed scroll pedestal. 3. Among the plurality of bypass holes communicating through the fixed scroll wrap, and the plurality of bypass holes provided between the fixed scroll wrap grooves, the one closest to the discharge port is the first bypass hole, and the other is the second bypass hole. Assuming a bypass hole, the second bypass hole is on a line advanced by 2π radians or approximately 2π radians from the first bypass hole, and the distance between the bypass holes is the same or approximately the same as that of a pair of bypass holes. A scroll compressor according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21509489A JPH0381588A (en) | 1989-08-23 | 1989-08-23 | Capacity control device for scroll type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21509489A JPH0381588A (en) | 1989-08-23 | 1989-08-23 | Capacity control device for scroll type compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0381588A true JPH0381588A (en) | 1991-04-05 |
Family
ID=16666656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21509489A Pending JPH0381588A (en) | 1989-08-23 | 1989-08-23 | Capacity control device for scroll type compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0381588A (en) |
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-
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- 1989-08-23 JP JP21509489A patent/JPH0381588A/en active Pending
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