JPH0693981A - Scroll type compressor - Google Patents

Scroll type compressor

Info

Publication number
JPH0693981A
JPH0693981A JP24188992A JP24188992A JPH0693981A JP H0693981 A JPH0693981 A JP H0693981A JP 24188992 A JP24188992 A JP 24188992A JP 24188992 A JP24188992 A JP 24188992A JP H0693981 A JPH0693981 A JP H0693981A
Authority
JP
Japan
Prior art keywords
pressure
scroll
fixed scroll
blade
refrigerant gas
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
Application number
JP24188992A
Other languages
Japanese (ja)
Inventor
Isao Kawabe
功 川邉
Satoru Oikawa
覚 及川
Akira Morishima
明 森嶋
Yuichi Tai
裕一 田井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP24188992A priority Critical patent/JPH0693981A/en
Publication of JPH0693981A publication Critical patent/JPH0693981A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To stably press a fixed scroll vane against a revolving scroll despite of the change of a pressure by forming at least three pressure introduction chambers on the back side of the fixed scroll vane and introduction gases to be compressed, having pressures different from each other, to each chamber. CONSTITUTION:After refrigerant gas is sucked in a first compression space a1, the refrigerant gas is compressed through reduction of the volumes of compression spaces a1-a3 by means of a revolving scroll vane 11. In this case, a part of refrigerant gas is introduced to pressure introduction chambers 38-40 from the compression spaces a1-a3 through pressure introduction holes 31-33. The pressure of refrigerant gas is exerted on the back surface 31 of the fixed scroll vane 12. In which case, since the pressure of the refrigerant pressure is increased along with movement of it to the central sides of the two scroll vanes 11 and 12, refrigerant gases having pressures different from each other are introduced to pressure introduction chambers 38-40. A back pressure exerted on the fixed scroll vane 12 is gradually increased toward the central side of an end plate part 12a. As a result, contact between the two scroll vanes 11 and 12 is stabilized.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、例えば、空気調和機の
冷凍サイクルを構成するスクロ−ル式圧縮機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor which constitutes a refrigerating cycle of an air conditioner, for example.

【0002】[0002]

【従来の技術】近年、空気調和機の冷凍サイクルにおい
ては、図3に示すようなスクロ−ル式圧縮機Aが多用さ
れる傾向にある。このスクロ−ル式圧縮機Aには、運転
騒音が極めて低く、かつ吸込弁や吐出弁等が不要で部品
点数が少なく、しかも圧縮性能が良いという特徴があ
る。図3のスクロ−ル式圧縮機(以下、圧縮機と称す
る)Aにおいては、密閉ケ−ス1内上部に支持フレ−ム
2が設けられ、回転軸3を回転自在に枢支している。
2. Description of the Related Art In recent years, in a refrigerating cycle of an air conditioner, a scroll type compressor A as shown in FIG. 3 is often used. This scroll type compressor A is characterized in that its operating noise is extremely low, that it does not require a suction valve, a discharge valve or the like, has a small number of parts, and has a good compression performance. In a scroll compressor (hereinafter referred to as a compressor) A shown in FIG. 3, a support frame 2 is provided in an upper portion inside a hermetically sealed case 1, and a rotary shaft 3 is rotatably supported. .

【0003】回転軸3には、後述する圧縮機構部4が連
結され、下部にはステ−タ5とロ−タ6とからなる電動
機部7が設けられている。回転軸3の下端部は電動機部
7から下方に突出していて、密閉ケ−ス1に取付けられ
た副軸受8によって枢支されている。
A compression mechanism section 4 described later is connected to the rotary shaft 3, and an electric motor section 7 composed of a stator 5 and a rotor 6 is provided in the lower portion. A lower end portion of the rotary shaft 3 projects downward from the electric motor portion 7 and is pivotally supported by a sub bearing 8 attached to the closed case 1.

【0004】また、密閉ケ−ス1の内底部には潤滑油を
集溜する油溜り部9が形成され、ここに回転軸3の下端
部が浸漬される。すなわち、回転軸3の回転に伴って、
油溜り部9の潤滑油が回転軸3に設けられた給油機構K
に沿って吸い上げられ、圧縮機構部4の各摺動部への給
油がなされる。
An oil sump 9 for collecting lubricating oil is formed in the inner bottom of the closed case 1, and the lower end of the rotary shaft 3 is immersed therein. That is, as the rotary shaft 3 rotates,
Lubricating oil for the oil sump 9 is provided on the rotary shaft 3
The oil is sucked up along with and oil is supplied to each sliding portion of the compression mechanism portion 4.

【0005】圧縮機構部4は、フレ−ム2にオルダムリ
ング10を介して旋回自在に支持される旋回スクロ−ル
翼11と、この旋回スクロ−ル翼11と噛合った固定ス
クロ−ル翼12と、この固定スクロ−ル翼12を軸方向
に移動可能に支持する支持手段13、および、固定スク
ロ−ル翼12の背面側にガス圧を作用させる背圧案内手
段14とから構成される。上記オルダムリング10は、
旋回スクロ−ル翼11の自転を規制し、旋回運動のみ行
わせる。
The compression mechanism section 4 includes a swirl scroll blade 11 supported by the frame 2 via an Oldham ring 10 so as to freely swivel, and a fixed scroll blade meshed with the swirl scroll blade 11. 12, a support means 13 for movably supporting the fixed scroll blade 12 in the axial direction, and a back pressure guide means 14 for applying a gas pressure to the back side of the fixed scroll blade 12. . The Oldham ring 10 is
The rotation of the swirl scroll blade 11 is restricted so that only the swirling motion is performed.

【0006】旋回スクロ−ル翼11は、上記回転軸3の
上端偏心部3aに掛合するボス部11cを備えた鏡板部
11aと、この鏡板部11aの上面側に一体に突設され
た渦巻状の翼部11bとからなる。
The swirl scroll blade 11 is provided with an end plate portion 11a having a boss portion 11c which engages with the upper end eccentric portion 3a of the rotary shaft 3, and a spiral shape integrally projecting on the upper surface side of the end plate portion 11a. And the wing portion 11b.

【0007】固定スクロ−ル翼12は、鏡板部12a
と、この鏡板12aの下面側に一体に突設され旋回スク
ロ−ル翼11の翼部11bと噛合する渦巻状の翼部12
bとからなる。
The fixed scroll blade 12 has an end plate 12a.
And a spiral blade 12 that is integrally provided on the lower surface of the end plate 12a and meshes with the blade 11b of the swirl scroll blade 11.
b.

【0008】これら旋回、固定スクロ−ル翼11、12
の鏡板部11a、12aと翼部11b、12bとにより
複数の圧縮空間a…が形成され、被圧縮ガスである冷媒
ガスが周端部側から取り込まれる。圧縮空間a…は、両
スクロ−ル翼11、12の相対運動に伴って、中心部側
に移動するとともにその容積を縮小させる。そして、圧
縮空間a…の容積変化に伴って冷媒ガスが圧縮される。
固定スクロ−ル翼の12の鏡板部12aの上面部は凹陥
状に形成され、この中央部には、中心寄りの圧縮空間と
連通する吐出ポ−ト15が貫通している。
These swirling and fixed scroll wings 11, 12
A plurality of compression spaces a are formed by the end plate portions 11a and 12a and the blade portions 11b and 12b, and the refrigerant gas that is the compressed gas is taken in from the peripheral end side. The compression spaces a move to the center side with the relative movement of the scroll blades 11 and 12, and reduce the volume thereof. Then, the refrigerant gas is compressed as the volume of the compression spaces a ...
The upper surface of the end plate portion 12a of the fixed scroll blade 12 is formed in a concave shape, and a discharge port 15 communicating with the compression space near the center penetrates through the central portion.

【0009】さらに、鏡板部12aの上面側には、吐出
ポ−ト15を中心として、異なる半径の、二つの突条1
6a、16bが一体に設けられ、かつこれら互いの突条
16a、16b間の鏡板部12a部位には、中間圧導入
孔17が貫通している。
Further, on the upper surface side of the end plate portion 12a, two ridges 1 having different radii about the discharge port 15 are provided.
6a and 16b are integrally provided, and an intermediate pressure introducing hole 17 penetrates through the end plate portion 12a between the protrusions 16a and 16b.

【0010】固定スクロ−ル翼12の上面側には、密閉
ケ−ス1内部を上端部空間と下部空間とに仕切る圧力仕
切板18が、突条16a、16b上端と狭小の間隙を存
して密閉ケ−ス1に取付固定されている。
On the upper surface side of the fixed scroll blade 12, a pressure partition plate 18 for partitioning the inside of the closed case 1 into an upper end space and a lower space exists with a narrow gap between the upper ends of the protrusions 16a, 16b. And is fixedly attached to the closed case 1.

【0011】この圧力仕切板18は、中央部に逆止弁1
9を備えた弁座部20が設けられ、上記吐出ポ−ト15
と連通する。換言すれば、吐出ポ−ト15は逆止弁19
を備えた弁座部20を介して、圧力仕切板18の上部側
空間と連通する。
The pressure partition plate 18 has a check valve 1 at the center thereof.
9 is provided with a valve seat portion 20, and the discharge port 15 is provided.
Communicate with. In other words, the discharge port 15 has the check valve 19
It communicates with the upper space of the pressure partition plate 18 via the valve seat portion 20 provided with.

【0012】固定スクロ−ル翼12の吐出ポ−ト15周
囲に設けられた凹陥部と背圧板弁座部20とで、圧縮さ
れた高圧ガスが導かれる高圧吐出室22が形成される。
また、高圧吐出室22の外側には中間圧室23が環状に
形成されている。そして、高圧吐出室22と中間圧室2
3とによって背圧案内手段14が構成されている。
A high pressure discharge chamber 22 through which the compressed high pressure gas is guided is formed by the recessed portion provided around the discharge port 15 of the fixed scroll blade 12 and the back pressure plate valve seat portion 20.
An intermediate pressure chamber 23 is formed in an annular shape outside the high pressure discharge chamber 22. Then, the high pressure discharge chamber 22 and the intermediate pressure chamber 2
The back pressure guide means 14 is constituted by 3 and 3.

【0013】なお、密閉ケ−ス1の上部側面には吐出管
24が接続されており、吐出管24は、圧力仕切板18
によって仕切られる密閉ケ−ス1内の上部空間と、冷凍
装置の図示しない凝縮器とを連通させる。
A discharge pipe 24 is connected to the upper side surface of the closed case 1, and the discharge pipe 24 is connected to the pressure partition plate 18.
An upper space in the closed case 1 partitioned by the above is communicated with a condenser (not shown) of the refrigeration system.

【0014】密閉ケ−ス1の中間部側面には吸込管25
が接続されていて、吸込管25は、圧力仕切板18によ
って仕切られる密閉ケ−ス1内の下部空間と、冷凍装置
の図示しない蒸発器とを連通させる。
A suction pipe 25 is provided on the side surface of the middle portion of the closed case 1.
The suction pipe 25 connects the lower space in the closed case 1 partitioned by the pressure partition plate 18 to an evaporator (not shown) of the refrigeration system.

【0015】このような圧縮機Aにおいて、電動機部7
が通電されて圧縮機構部4が駆動されると、吸込管25
から低圧な冷媒ガスが密閉ケ−ス1内に導入され、圧力
仕切板18より下部の空間に充満する。
In such a compressor A, the electric motor section 7
When the compression mechanism section 4 is driven by being energized, the suction pipe 25
A low-pressure refrigerant gas is introduced into the closed case 1 from above, and fills the space below the pressure partition plate 18.

【0016】この冷媒ガスは、旋回スクロ−ル翼11と
固定スクロ−ル翼12とによって形成された圧縮空間a
…の外周側に吸込まれる。冷媒ガスは、旋回スクロ−ル
翼11の旋回運動に伴って徐々に中心部に移送される。
さらに、旋回スクロ−ル翼11の旋回運動に伴って空間
容量が減少し、この結果、冷媒ガスが圧縮される。
This refrigerant gas is a compression space a formed by a swirling scroll blade 11 and a fixed scroll blade 12.
It is sucked into the outer peripheral side of. The refrigerant gas is gradually transferred to the central portion along with the swirling motion of the swirling scroll blade 11.
Further, the space volume is reduced with the swirling motion of the swirl scroll blade 11, and as a result, the refrigerant gas is compressed.

【0017】冷媒ガスが所定圧まで上昇したところで、
吐出ポ−ト15から高圧吐出室22を介して圧力仕切板
18の上部空間へ吐出され、さらに吐出管24を介して
外部の凝縮機に導かれる。なお、吐出ポ−ト15から吐
出される高圧の冷媒ガスが一旦高圧吐出室22に充満し
て、固定スクロ−ル翼12の中央部に高圧の背圧をかけ
る。
When the refrigerant gas rises to a predetermined pressure,
It is discharged from the discharge port 15 to the upper space of the pressure partition plate 18 via the high pressure discharge chamber 22, and is further guided to the external condenser via the discharge pipe 24. The high-pressure refrigerant gas discharged from the discharge port 15 once fills the high-pressure discharge chamber 22 and applies a high-pressure back pressure to the central portion of the fixed scroll vane 12.

【0018】さらに、圧縮途中の冷媒ガス、即ち中間圧
の冷媒ガスが中間圧導入孔17を介して中間圧室23へ
導かれ、中間圧室23に充満する。そして、中間圧の冷
媒ガスが固定スクロ−ル翼12の周端部に中間圧の背圧
をかける。
Further, the refrigerant gas in the middle of compression, that is, the intermediate pressure refrigerant gas is introduced into the intermediate pressure chamber 23 through the intermediate pressure introducing hole 17 and fills the intermediate pressure chamber 23. Then, the intermediate-pressure refrigerant gas exerts an intermediate-pressure back pressure on the peripheral end portion of the fixed scroll blade 12.

【0019】このようにして、通常の運転状態では、背
圧案内手段14が固定スクロ−ル翼12に効果的な背圧
をかける。固定スクロ−ル翼12は、支持手段13によ
って軸方向へ移動可能に支持されているが、背圧案内手
段14の作用によって軸方向への移動を規制され、旋回
スクロ−ル翼11に押圧される。
Thus, under normal operating conditions, the back pressure guide means 14 exerts an effective back pressure on the fixed scroll blade 12. The fixed scroll blade 12 is supported by the support means 13 so as to be movable in the axial direction, but the movement of the fixed scroll blade 12 in the axial direction is restricted by the action of the back pressure guide means 14, and the fixed scroll blade 12 is pressed by the swirl scroll blade 11. It

【0020】運転条件によっては、圧縮空間a…に液冷
媒が吸込まれることがあり、この場合には冷媒ガスが過
度に昇圧する。背圧案内手段14の背圧よりも冷媒ガス
の圧力が上回り、固定スクロ−ル翼12は軸方向に移動
する。
Depending on the operating conditions, the liquid refrigerant may be sucked into the compression space a ... In this case, the refrigerant gas is excessively pressurized. The pressure of the refrigerant gas exceeds the back pressure of the back pressure guide means 14, and the fixed scroll blade 12 moves in the axial direction.

【0021】旋回スクロ−ル翼11と固定スクロ−ル翼
12とのクリアランスが拡大し、異常高圧の冷媒ガスが
密閉ケ−ス1内へ逃がされる。そして、いわゆるコンプ
ライアンス機能が発揮され、各スクロ−ル翼部11b、
12bのストレスが解消される。
The clearance between the swirling scroll blade 11 and the fixed scroll blade 12 is enlarged, and the refrigerant gas of abnormally high pressure is released into the closed case 1. Then, a so-called compliance function is exerted, and each scroll wing portion 11b,
The stress of 12b is released.

【0022】[0022]

【発明が解決しようとする課題】ところで、上述のよう
な従来の圧縮機Aにおいては、固定スクロ−ル翼12の
背面側に高圧吐出室22と中間圧室23とが形成されて
いる。そして、冷媒ガスが二箇所から高圧吐出室22或
いは中間圧室23に導かれ、旋回スクロ−ル翼11の背
面に作用する。しかし、圧縮機Aの運転状態によっては
吸込圧及び吐出圧が変化することがあり、この場合には
押圧力を一定に保つことができないという不具合があ
る。そして、両スクロ−ル翼11、12の接触力が安定
せず、押圧力が不足して固定スクロ−ル翼12がふれ回
ったり、或いは逆に押圧力が強すぎて摺動部が摩耗した
りすることがあった。本発明の目的とするところは、両
スクロ−ル翼の接触力を安定させることが可能なスクロ
−ル式圧縮機を提供することにある。
In the conventional compressor A as described above, the high pressure discharge chamber 22 and the intermediate pressure chamber 23 are formed on the back side of the fixed scroll blade 12. Then, the refrigerant gas is introduced into the high pressure discharge chamber 22 or the intermediate pressure chamber 23 from two places and acts on the back surface of the swirl scroll blade 11. However, the suction pressure and the discharge pressure may change depending on the operating state of the compressor A, and in this case, the pressing force cannot be kept constant. The contact force between the two scroll blades 11 and 12 is not stable, and the pressing force is insufficient so that the fixed scroll blade 12 swirls, or conversely, the pressing force is too strong and the sliding portion is worn. There was something that happened. An object of the present invention is to provide a scroll compressor capable of stabilizing the contact force between both scroll blades.

【0023】[0023]

【課題を解決するための手段および作用】上記目的を達
成するために本発明は、軸方向に移動自在な固定スクロ
−ル翼と、この固定スクロ−ル翼に対して偏心した旋回
スクロ−ル翼とを備え、両スクロ−ル翼の翼部を噛み合
わせて両スクロ−ル翼の間に複数の圧縮空間を形成し、
旋回スクロ−ル翼を旋回運動させて圧縮空間に吸込まれ
た被圧縮ガスを圧縮するとともに、固定スクロ−ル翼に
背圧を作用させて両スクロ−ル翼の接触力を調節するス
クロ−ル式圧縮機において、固定スクロ−ル翼の背面側
に少なくとも三つの圧力導入室を形成し、これら圧力導
入室に異なる圧力の被圧縮ガスを導入することにある。
こうすることによって本発明は、両スクロ−ル翼の接触
力を安定させることができるようにしたことにある。
In order to achieve the above object, the present invention provides a fixed scroll blade movable in the axial direction and a swirl scroll eccentric with respect to the fixed scroll blade. And a plurality of compression spaces are formed between the scroll blades by engaging the blade portions of the scroll blades with each other.
A scroll that swirls the swirl scroll blades to compress the compressed gas that has been sucked into the compression space, and applies back pressure to the fixed scroll blades to adjust the contact force between both scroll blades. In the conventional compressor, at least three pressure introducing chambers are formed on the back surface side of the fixed scroll blade, and compressed gases having different pressures are introduced into these pressure introducing chambers.
By doing so, the present invention is to make it possible to stabilize the contact force between both scroll blades.

【0024】[0024]

【実施例】以下、本発明の一実施例の要部を図1及び図
2に基づいて説明する。なお、従来の技術の項で説明し
たものと重複するものについては同一番号を付し、その
説明は省略する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The essential parts of one embodiment of the present invention will be described below with reference to FIGS. The same parts as those described in the section of the prior art are designated by the same reference numerals, and the description thereof will be omitted.

【0025】図1は本発明の一実施例の要部を示すもの
で、図中の符号11は旋回スクロ−ル翼、符号12は固
定スクロ−ル翼を示している。さらに、符号18は圧力
仕切板を示しており、符号3aは回転軸3の偏心部を示
している。
FIG. 1 shows an essential part of one embodiment of the present invention. In the figure, reference numeral 11 is a swirl scroll blade, and reference numeral 12 is a fixed scroll blade. Further, reference numeral 18 indicates a pressure partition plate, and reference numeral 3a indicates an eccentric portion of the rotary shaft 3.

【0026】旋回スクロ−ル翼11は、鏡板部11aに
渦巻状の翼部11bを突設してなるものである。さら
に、旋回スクロ−ル翼11は、鏡板部11aの背面の中
央部ににボス部11cを有しており、このボス部11c
に回転軸3の偏心部3aが入り込んでいる。
The swirl scroll blade 11 is composed of an end plate portion 11a and a spiral blade portion 11b provided in a protruding manner. Further, the swirl scroll blade 11 has a boss portion 11c at the center of the back surface of the end plate portion 11a.
The eccentric portion 3a of the rotary shaft 3 is inserted in the.

【0027】固定スクロ−ル翼12は、旋回スクロ−ル
翼11と同様に、鏡板部12aに渦巻状の翼部12bを
突設してなるものである。さらに、固定スクロ−ル翼1
2は翼部12bを旋回スクロ−ル11の側に向けて旋回
スクロ−ル11に組合っており、翼部12bを旋回スク
ロ−ル翼11の翼部11bに噛み合わせている。
The fixed scroll blade 12 is similar to the swirl scroll blade 11 in that the end plate portion 12a is provided with a spiral blade portion 12b. In addition, fixed scroll wing 1
2, the wing portion 12b is combined with the slewing scroll 11 so that the wing portion 12b faces the side of the slewing scroll 11, and the wing portion 12b is meshed with the wing portion 11b of the orbiting scroll blade 11.

【0028】両鏡板部11a、12aの間の空間は両翼
部11b、12bによって仕切られており、両スクロ−
ル翼11、12の間には第1〜第3の圧縮空間a1 〜a
3 が形成されている。
The space between both end plate parts 11a and 12a is partitioned by both wing parts 11b and 12b.
The first to third compression spaces a 1 to a 1 between the blades 11 and 12.
3 is formed.

【0029】さらに、固定スクロ−ル翼12の鏡板部1
2aには第1〜第3の圧力導入孔31〜33が設けられ
ており、各圧力導入孔31〜33は鏡板部12aを貫通
している。そして、各圧力導入孔31〜33はそれぞれ
第1〜第3の圧縮空間a1 〜a3 に連通するとともに、
鏡板部12aの背面34に開口している。
Further, the end plate portion 1 of the fixed scroll blade 12
2a is provided with first to third pressure introducing holes 31 to 33, and each pressure introducing hole 31 to 33 penetrates the end plate portion 12a. Then, the pressure introducing holes 31 to 33 communicate with the first to third compression spaces a 1 to a 3 , respectively, and
The rear surface 34 of the end plate portion 12a has an opening.

【0030】また、第3の圧力導入孔33は鏡板部12
aの中央に位置しており、第2の圧力導入孔32、32
は第3の圧力導入孔33、33の外側に位置している。
さらに、第1の圧力導入孔31、31は第2の圧力導入
孔32、32の外側に位置している。
Further, the third pressure introducing hole 33 is provided in the end plate 12
It is located at the center of a and has the second pressure introducing holes 32, 32.
Are located outside the third pressure introducing holes 33, 33.
Furthermore, the first pressure introducing holes 31, 31 are located outside the second pressure introducing holes 32, 32.

【0031】固定スクロ−ル翼12の背面34は圧力仕
切板18に接近して対向している。さらに、固定スクロ
−ル翼12と圧力仕切板18との間には、三つのシ−ル
材35〜37が挟まれている。各シ−ル材35〜37は
断面が円形な環状体であり、各シ−ル材35〜37の環
の径寸法は異なっている。そして、シ−ル材35〜37
は略同心に配置されている。
The back surface 34 of the fixed scroll blade 12 is close to and faces the pressure partition plate 18. Furthermore, three seal members 35 to 37 are sandwiched between the fixed scroll blade 12 and the pressure partition plate 18. Each seal member 35 to 37 is an annular body having a circular cross section, and the ring members of each seal member 35 to 37 have different diameters. And the seal material 35-37
Are arranged substantially concentrically.

【0032】シ−ル材35〜37の配置は、固定スクロ
−ル翼12の第1〜第3の圧力導入孔31〜33の配置
に合わせて決められている。つまり、最大径のシ−ル材
35と中間径のシ−ル材36の間に第1の圧力導入孔3
1、31が位置しており、中間径のシ−ル材36と最小
径のシ−ル材37との間に第2の圧力導入孔32、32
が位置している。また、最小径のシ−ル材37の内側に
第3の圧力導入孔33が位置している。
The arrangement of the seal materials 35 to 37 is determined according to the arrangement of the first to third pressure introduction holes 31 to 33 of the fixed scroll blade 12. That is, the first pressure introducing hole 3 is provided between the seal material 35 having the maximum diameter and the seal material 36 having the intermediate diameter.
1, 31 are located, and the second pressure introducing holes 32, 32 are provided between the seal material 36 having the intermediate diameter and the seal material 37 having the minimum diameter.
Is located. The third pressure introducing hole 33 is located inside the seal member 37 having the smallest diameter.

【0033】各シ−ル材35〜37は固定スクロ−ル翼
12と圧力仕切板18とに圧接しており、各シ−ル材3
5〜37の内側と外側は気密的に仕切られている。そし
て、最大径のシ−ル材35と中間径のシ−ル材36との
間には第1の圧力導入室38が形成されており、中間径
のシ−ル材36と最小径のシ−ル材37との間には第2
の圧力導入室39が形成されている。さらに、最小径の
シ−ル材37の内側には第3の圧力導入室40が形成さ
れている。そして、第1〜第3の圧力導入室31〜33
はそれぞれ第1〜第3の圧縮空間a1 〜a3 と連通して
いる。
The seal members 35 to 37 are in pressure contact with the fixed scroll blade 12 and the pressure partition plate 18, and the seal members 3 to 37 are in contact with each other.
The inside and the outside of 5 to 37 are airtightly partitioned. A first pressure introducing chamber 38 is formed between the maximum-diameter seal material 35 and the intermediate-diameter seal material 36, and the intermediate-diameter seal material 36 and the minimum-diameter seal material 36 are formed. -The second between the lumber 37
The pressure introducing chamber 39 is formed. Further, a third pressure introducing chamber 40 is formed inside the seal member 37 having the smallest diameter. And the 1st-3rd pressure introduction chambers 31-33
Respectively communicate with the first to third compression spaces a 1 to a 3 .

【0034】なお、固定スクロ−ル翼12は、軸方向に
移動できる状態で、図示しない密閉ケ−スにより支持さ
れている。また、旋回スクロ−ル翼11は固定スクロ−
ル12に対して偏心しており、オルダムリング(図示し
ない)等により自転を規制されながら、固定スクロ−ル
翼12に対して旋回する。また、圧力仕切板18の中央
部に形成された貫通孔41に、従来の技術の項で説明し
た圧縮機Aと同様に逆止弁(図示しない)等が収納され
る。
The fixed scroll blade 12 is supported by a closed case (not shown) while being movable in the axial direction. In addition, the swirl scroll blade 11 is a fixed scroll.
It is eccentric with respect to the rotor 12, and rotates with respect to the fixed scroll blade 12 while its rotation is restricted by an Oldham ring (not shown) or the like. Further, a check valve (not shown) and the like are housed in the through hole 41 formed in the central portion of the pressure partition plate 18 as in the compressor A described in the section of the related art.

【0035】上述のような圧縮機の運転状態において
は、最も外側に位置する第1の圧縮空間a1 に被圧縮ガ
スとしての冷媒ガスが吸込まれ、この冷媒ガスが旋回ス
クロ−ル翼11の旋回運動に伴って中心へ移送される。
さらに、旋回スクロ−ル翼11の旋回運動に伴って圧縮
空間a1 〜a3 の容量が減少し、この結果、冷媒ガスが
圧縮される。
In the operating state of the compressor as described above, the refrigerant gas as the gas to be compressed is sucked into the first compression space a 1 located at the outermost side, and the refrigerant gas of the orbiting scroll blade 11 is absorbed. It is transferred to the center with the turning motion.
Further, the capacities of the compression spaces a 1 to a 3 decrease with the swirling motion of the swirl scroll blade 11, and as a result, the refrigerant gas is compressed.

【0036】各圧縮空間a1 〜a3 の冷媒ガスの一部が
第1〜第3の圧力導入孔31〜33を通って第1〜第3
の圧力導入孔38〜40へ導入される。そして、固定ス
クロ−ル翼12の背面31に冷媒ガスの圧力が作用す
る。
A part of the refrigerant gas in each of the compression spaces a 1 to a 3 passes through the first to third pressure introducing holes 31 to 33, and then the first to third parts.
Are introduced into the pressure introduction holes 38 to 40 of the above. Then, the pressure of the refrigerant gas acts on the back surface 31 of the fixed scroll blade 12.

【0037】冷媒ガスの圧力は固定スクロ−ル翼12
(及び旋回スクロ−ル翼11の)中心側へ移動するにし
たがって上昇する。このため、各圧縮空間a1 〜a3
冷媒ガスの圧力が異なり、各圧力導入室38〜40には
異なる圧力の冷媒ガスが導かれる。そして、固定スクロ
−ル翼12には三つの値の背圧が作用し、この背圧は鏡
板部12aの外周側から中心側へいくほど高い。
The pressure of the refrigerant gas is the fixed scroll blade 12
It rises as it moves toward the center (and of the swirl scroll blade 11). Therefore, the pressures of the refrigerant gases in the compression spaces a 1 to a 3 are different, and the refrigerant gases having different pressures are introduced into the pressure introducing chambers 38 to 40. Then, three values of back pressure act on the fixed scroll blade 12, and this back pressure increases from the outer peripheral side of the end plate portion 12a toward the center side.

【0038】すなわち、上述のように三つの圧力導入室
38〜40を形成して固定スクロ−ル翼12に背圧を作
用させる圧縮機においては、鏡板部12aの外周側から
中央側に亘って背圧が徐々に変化し、隣り合った圧力導
入室間の圧力差が小さい。このため、固定スクロ−ル翼
12を旋回スクロ−ル翼11に押し付けようとする力
と、両翼11、12を引き離そうとする力の関係を常に
略一定に保つことができる。そして、冷媒ガスの吸込圧
或いは吐出圧が変化し、両スクロ−ル翼間の発生圧力が
変化しても、固定スクロ−ル翼12を安定して旋回スク
ロ−ル翼11に押し付けることができる。
That is, in the compressor in which the three pressure introducing chambers 38 to 40 are formed to apply the back pressure to the fixed scroll vane 12 as described above, the end plate portion 12a extends from the outer peripheral side to the central side. The back pressure changes gradually, and the pressure difference between adjacent pressure introducing chambers is small. Therefore, the relationship between the force that pushes the fixed scroll blade 12 against the swirl scroll blade 11 and the force that pulls the two blades 11 and 12 apart can always be kept substantially constant. Then, even if the suction pressure or the discharge pressure of the refrigerant gas changes and the generated pressure between both scroll blades changes, the fixed scroll blade 12 can be pressed stably against the swirl scroll blade 11. .

【0039】従来のように二つの値の背圧が固定スクロ
−ル翼12に作用する場合、両スクロ−ル翼11、12
の接触力と圧縮比との関係は図2(a)によって示され
る。しかし、本実施例のように固定スクロ−ル翼12に
作用する背圧を段階的に変化させた場合には、両スクロ
−ル翼11、12の接触力と圧縮比との関係は図2
(b)に示すように変化する。つまり、図2(b)にお
いては圧縮比が変化しても接触力の変化は小さい。
When two values of back pressure act on the fixed scroll blade 12 as in the prior art, both scroll blades 11 and 12 are used.
The relationship between the contact force and the compression ratio is shown in FIG. However, when the back pressure acting on the fixed scroll blade 12 is changed stepwise as in this embodiment, the relationship between the contact force between the scroll blades 11 and 12 and the compression ratio is shown in FIG.
It changes as shown in (b). That is, in FIG. 2B, the change in the contact force is small even if the compression ratio changes.

【0040】したがって、本実施例の圧縮機によれば、
固定スクロ−ル翼に作用する押圧力を安定させることが
できる。そして、高いCOP(成績係数)及び高い信頼
性が得られる。
Therefore, according to the compressor of this embodiment,
The pressing force acting on the fixed scroll blade can be stabilized. And high COP (coefficient of performance) and high reliability are obtained.

【0041】なお、本実施例においては、三つの圧縮空
間a1 〜a3 が形成され、圧力導入室38〜40の数も
三つに設定されているが、本発明はこれに限定されるも
のではなく、圧力導入室の数を更に増やして隣合った圧
力導入室間の圧力差をより小さく設定してもよい。ま
た、圧力導入室31〜33の数は、本実施例に限定され
ず、必要に応じて種々に変更可能である。さらに、本発
明は、固定スクロ−ル翼11の背面34や圧力仕切板1
8の下面に突条が形成されたタイプの圧縮機にも適用可
能である。そして、本発明は、要旨を逸脱しない範囲で
種々に変形することが可能である。
In this embodiment, three compression spaces a 1 to a 3 are formed and the number of pressure introducing chambers 38 to 40 is set to three, but the present invention is not limited to this. However, the number of pressure introducing chambers may be further increased to set the pressure difference between adjacent pressure introducing chambers to be smaller. Further, the number of the pressure introducing chambers 31 to 33 is not limited to this embodiment, and can be variously changed as necessary. Further, according to the present invention, the back surface 34 of the fixed scroll blade 11 and the pressure partition plate 1 are provided.
It is also applicable to a compressor of the type in which a ridge is formed on the lower surface of 8. The present invention can be variously modified without departing from the scope of the invention.

【0042】[0042]

【発明の効果】以上説明したように本発明は、軸方向に
移動自在な固定スクロ−ル翼と、この固定スクロ−ル翼
に対して偏心した旋回スクロ−ル翼とを備え、両スクロ
−ル翼の翼部を噛み合わせて両スクロ−ル翼の間に複数
の圧縮空間を形成し、旋回スクロ−ル翼を旋回運動させ
て圧縮空間に吸込まれた被圧縮ガスを圧縮するととも
に、固定スクロ−ル翼に背圧を作用させて両スクロ−ル
翼の接触力を調節するスクロ−ル式圧縮機において、固
定スクロ−ル翼の背面側に少なくとも三つの圧力導入室
を形成し、これら圧力導入室に異なる圧力の被圧縮ガス
を導入するものである。したがって本発明は、両スクロ
−ル翼の接触力を安定させることができるという効果が
ある。
As described above, the present invention is provided with the fixed scroll blade movable in the axial direction and the swirl scroll blade eccentric with respect to the fixed scroll blade. A plurality of compression spaces are formed between the scroll blades by meshing the blade portions of the scroll blades, and the swirling scroll blades are swung to compress the compressed gas sucked into the compression space and to fix it. In a scroll type compressor in which a back pressure is applied to the scroll blades to adjust the contact force between the scroll blades, at least three pressure introducing chambers are formed on the back side of the fixed scroll blades. The compressed gases having different pressures are introduced into the pressure introducing chamber. Therefore, the present invention has the effect of stabilizing the contact force between the two scroll blades.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例の要部を示す断面図。FIG. 1 is a sectional view showing an essential part of an embodiment of the present invention.

【図2】(a)は従来の圧縮機の両スクロ−ル翼の接触
力と圧縮比との関係を示すグラフ、(b)は本実施例の
圧縮機の両スクロ−ル翼の接触力と圧縮比との関係を示
すグラフ。
FIG. 2A is a graph showing the relationship between the contact force of both scroll blades of a conventional compressor and the compression ratio, and FIG. 2B is the contact force of both scroll blades of the compressor of this embodiment. And a graph showing the relationship between the compression ratio.

【図3】一般のスクロ−ル式圧縮機を示す断面図。FIG. 3 is a sectional view showing a general scroll type compressor.

【符号の説明】[Explanation of symbols]

11…旋回スクロ−ル翼、12…固定スクロ−ル翼、1
1b…旋回スクロ−ル翼の翼部、12b…固定スクロ−
ル翼の翼部、34…固定スクロ−ル翼の背面、38〜4
0…第1〜第3の圧力導入室、A…スクロ−ル式圧縮
機、a1 〜a3…圧縮空間。
11 ... Swirl scroll blade, 12 ... Fixed scroll blade, 1
1b ... Wing portion of swirl scroll blade, 12b ... Fixed scroll
Wing portion of le wing, 34 ... Rear surface of fixed scroll wing, 38-4
0 ... first to third pressure introduction chamber, A ... scroll - Le compressor, a 1 ~a 3 ... compression space.

フロントページの続き (72)発明者 田井 裕一 静岡県富士市蓼原336番地 株式会社東芝 富士工場内Front page continuation (72) Inventor Yuichi Tai 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Corporation Fuji Factory

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 軸方向に移動自在な固定スクロ−ル翼
と、この固定スクロ−ル翼に対して偏心した旋回スクロ
−ル翼とを備え、上記両スクロ−ル翼の翼部を噛み合わ
せて上記両スクロ−ル翼の間に複数の圧縮空間を形成
し、上記旋回スクロ−ル翼を旋回運動させて上記圧縮空
間に吸込まれた被圧縮ガスを圧縮するとともに、上記固
定スクロ−ル翼に背圧を作用させて上記両スクロ−ル翼
の接触力を調節するスクロ−ル式圧縮機において、上記
固定スクロ−ル翼の背面側に少なくとも三つの圧力導入
室を形成し、これら圧力導入室に異なる圧力の被圧縮ガ
スを導入することを特徴とするスクロ−ル式圧縮機。
1. A fixed scroll blade, which is movable in the axial direction, and a swirl scroll blade, which is eccentric to the fixed scroll blade, and meshes the blade portions of both scroll blades. A plurality of compression spaces are formed between the two scroll blades, the swirl scroll blades are swung to compress the compressed gas sucked into the compression spaces, and the fixed scroll blades are also compressed. In a scroll type compressor in which a back pressure is applied to adjust the contact force of both scroll blades, at least three pressure introducing chambers are formed on the back side of the fixed scroll blades, and these pressure introducing chambers are formed. A scroll-type compressor characterized in that compressed gases having different pressures are introduced into a chamber.
JP24188992A 1992-09-10 1992-09-10 Scroll type compressor Pending JPH0693981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24188992A JPH0693981A (en) 1992-09-10 1992-09-10 Scroll type compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24188992A JPH0693981A (en) 1992-09-10 1992-09-10 Scroll type compressor

Publications (1)

Publication Number Publication Date
JPH0693981A true JPH0693981A (en) 1994-04-05

Family

ID=17081060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24188992A Pending JPH0693981A (en) 1992-09-10 1992-09-10 Scroll type compressor

Country Status (1)

Country Link
JP (1) JPH0693981A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1760318A3 (en) * 2002-07-15 2008-06-04 Emerson Climate Technologies, Inc. Dual volume-ratio scroll machine
JP2011214506A (en) * 2010-03-31 2011-10-27 Daikin Industries Ltd Rotary compressor
JP2022033392A (en) * 2020-08-17 2022-03-02 パナソニックIpマネジメント株式会社 Scroll compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8475140B2 (en) 2000-10-16 2013-07-02 Emerson Climate Technologies, Inc. Dual volume-ratio scroll machine
EP1760318A3 (en) * 2002-07-15 2008-06-04 Emerson Climate Technologies, Inc. Dual volume-ratio scroll machine
JP2011214506A (en) * 2010-03-31 2011-10-27 Daikin Industries Ltd Rotary compressor
JP2022033392A (en) * 2020-08-17 2022-03-02 パナソニックIpマネジメント株式会社 Scroll compressor

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