JP2816201B2 - Scroll compressor - Google Patents
Scroll compressorInfo
- Publication number
- JP2816201B2 JP2816201B2 JP1264921A JP26492189A JP2816201B2 JP 2816201 B2 JP2816201 B2 JP 2816201B2 JP 1264921 A JP1264921 A JP 1264921A JP 26492189 A JP26492189 A JP 26492189A JP 2816201 B2 JP2816201 B2 JP 2816201B2
- Authority
- JP
- Japan
- Prior art keywords
- scroll
- pressure
- suction pipe
- compressor
- orbiting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
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関するもので、さらに、
詳しくいえば起動負荷を低減可能なスクロール圧縮機に
関するものである。The present invention relates to a scroll compressor, and further relates to a scroll compressor.
More specifically, the present invention relates to a scroll compressor capable of reducing a starting load.
従来のスクロール圧縮機は、特開昭59−11088号に記
載されているように、固定スクロールの巻き終わり部の
吸入孔に逆止弁を設けることにより、圧縮機停止時、バ
ネによって逆止弁（ピストン）を押し上げ、吸入管の端
面がシート面となってガスの逆流、すなわち旋回スクロ
ールが逆転することを防止している。As described in Japanese Patent Application Laid-Open No. 59-11088, a conventional scroll compressor is provided with a check valve at a suction hole at a winding end portion of a fixed scroll, so that when the compressor is stopped, a check valve is provided by a spring. (Piston) is pushed up, and the end surface of the suction pipe becomes a sheet surface to prevent the reverse flow of gas, that is, the reversal of the orbiting scroll.
しかるに上記の構造では、圧縮機起動時、逆止弁を介
して吸入管側圧力とスクロールラップ側圧力とは、差圧
が生じるため、単相モータのような、起動トルクが小さ
いモータでは、圧縮機の起動が出来ないという問題があ
る。However, in the above-described structure, when the compressor is started, a differential pressure is generated between the suction pipe side pressure and the scroll wrap side pressure via the check valve. There is a problem that the machine cannot be started.
又、大きな起動トルクが必要であることは、駆動軸を
支承している各軸受への荷重が大きくなり焼付になるこ
ともあり、起動電流も増え、モータ焼損、寿命低下の要
因ともなる。Further, the necessity of a large starting torque increases the load on each bearing supporting the drive shaft, which may result in seizure. This also increases the starting current, causing motor burnout and shortening of service life.
本発明の目的は、起動時の負荷低減を図かり、信頼性
の高いスクロール圧縮機を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable scroll compressor with a reduced load at startup.
上記目的を達成するため本発明は、相対的に旋回運動
の行う旋回スクロールと固定スクロールから成るスクロ
ール圧縮機構と、この圧縮機構と電動機を駆動軸によっ
て連結し、該駆動軸を支承する軸受を設けたフレームを
前記スクロール圧縮機構部と電動機の間に配設して互い
に連結固定して密閉併容器内に収納し、該密閉容器内に
高圧圧力雰囲気としたスクロール圧縮機において、 固定スクロールの巻き終わり部に吸入孔および吸入管
を駆動軸方向に設け、該吸入孔の円筒部は旋回スクロー
ルの運動範囲外に設け、吸入孔に逆止弁を設け、圧縮機
停止時逆止弁を介して、前記吸入管側へ圧縮機構部の圧
力を減圧させる機構を有するものである。In order to achieve the above object, the present invention provides a scroll compression mechanism composed of a orbiting scroll and a fixed scroll that relatively perform orbiting motion, and a bearing that connects the compression mechanism and an electric motor by a drive shaft and supports the drive shaft. The scrolled frame is disposed between the scroll compression mechanism and the electric motor, connected and fixed to each other, housed in a closed container, and a high-pressure atmosphere is provided in the closed container. A suction hole and a suction pipe are provided in the drive shaft direction, a cylindrical portion of the suction hole is provided outside the range of motion of the orbiting scroll, and a check valve is provided in the suction hole. A mechanism for reducing the pressure of the compression mechanism toward the suction pipe is provided.
上記構成のスクロール圧縮機において、固定スクロー
ル巻き終わり部の吸入孔に圧力損失の少ない弁を設け
て、運転中は開き、停止した時は閉じて、旋回スクロー
ルの逆転を防止する。その後、スクロールラップ内の圧
力を除々に吸入管側へバイパスさせ、スクロールラップ
内の圧力を減圧させると共に、スクロールラップ圧力と
吸入管側圧力をバランスさせる。これにより圧縮機起動
時の負荷トルクを軽減させる。In the scroll compressor having the above-described configuration, a valve having a small pressure loss is provided in the suction hole at the end of the fixed scroll winding, and is opened during operation and closed when stopped to prevent reverse rotation of the orbiting scroll. Thereafter, the pressure in the scroll wrap is gradually bypassed to the suction pipe side, the pressure in the scroll wrap is reduced, and the scroll wrap pressure and the suction pipe side pressure are balanced. Thereby, the load torque at the time of starting the compressor is reduced.
以下本発明の一実施例を図面に基づいて説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明を実施した密閉形スクロール圧縮機の
全体構造断面図を示す。FIG. 1 is a sectional view showing the overall structure of a hermetic scroll compressor embodying the present invention.
第２図は吸入孔を設けた固定スクロールと旋回スクロ
ールの横断面図で吸入を完了した状態を示す。FIG. 2 is a cross-sectional view of a fixed scroll provided with a suction hole and a orbiting scroll, showing a state in which suction has been completed.
第３図は本発明の実施例の部分断面図を示す。 FIG. 3 shows a partial sectional view of an embodiment of the present invention.
第１図において、密閉容器１内の上方には圧縮機部２
が、下方には電動機３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、台板上にうず巻状のラップ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のラップ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お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 unit 2
However, electric motors 3 are provided below, and a lubricating oil reservoir 4 is formed at the bottom of the sealed container 1. The compressor unit 2 includes a fixed scroll 5 having a spiral wrap 5a on a base plate, and a spiral wrap 6a also on a base plate.
And a frame 7 that is integrated with the fixed scroll 5 and supports the orbiting scroll 6. The fixed scroll 5 and the orbiting scroll 6 wrap together.
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３は密閉容器１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。クランク軸９はフレーム７に設け
た主軸受10と下部軸受11とで支持され、そのクランクピ
ンは旋回スクロール６の背面に設けた旋回軸受12と嵌合
されている。An Oldham mechanism 8 that prevents the orbiting scroll 6 from rotating is provided between the orbiting scroll 6 and the frame 7. The electric motor 3 is press-fitted and fastened to the closed container 1,
The orbiting scroll 6 is caused to orbit via the crankshaft 9. The crankshaft 9 is supported by a main bearing 10 and a lower bearing 11 provided on the frame 7, and its crankpin is fitted to a turning bearing 12 provided on the back 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13が設けられ、かつ電動
機３の軸端には油溜り４の潤滑油を吸い上げて前記給油
通路13へ送り込む給油装置14が設けられている。An oil supply passage 13 for guiding lubricating oil to the main bearing 10, the lower bearing 11, and the slewing bearing 12 is provided in the crankshaft 9, and the lubricating oil in the oil sump 4 is sucked up at the shaft end of the electric motor 3. A refueling device 14 for feeding the oil to the tank is provided.
前記の圧縮機部２は、旋回スクロール６が電動機３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の台板の中央に設
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。When the orbiting scroll 6 is caused to orbit via the crankshaft 9 driven by the electric motor 3, the compressor unit 2 moves the space (compression chamber) formed by the orbiting scroll 6 and the fixed scroll 5 in the scroll center direction. The compressed refrigerant gas decreases in volume as it moves to compress the refrigerant gas.
The compressed refrigerant gas is discharged from a discharge port 16 provided at the center of the base plate of the fixed scroll to an upper space 17 in 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が形成されている。An intermediate pressure chamber 15 is formed on the back of the orbiting scroll to guide the gas in the compression stroke.
中間圧室15の圧力は冷媒ガスの吸入圧力と吐出圧力の
中間の圧力であり、スクロールの摺動部への給油は、吐
出圧力と中間室圧力の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13を通り、主軸受10、下部軸
受11、および旋回軸受12を潤滑した後、中間圧室15を経
て圧縮室に流入し、冷媒ガスと混合した状態で固定スク
ロール５の中央に設けた吐出口16より密閉容器１内の上
部空間17へ吐出する。The pressure in the intermediate pressure chamber 15 is an intermediate pressure between the suction pressure and the discharge pressure of the refrigerant gas, and the supply of oil to the sliding portion of the scroll is performed using the differential pressure between the discharge pressure and the intermediate chamber pressure. The lubricating oil passes through the oil supply passage 13 from the oil supply device 14, lubricates the main bearing 10, the lower bearing 11, and the slewing bearing 12, then flows into the compression chamber through the intermediate pressure chamber 15, and is fixed in a state mixed with the refrigerant gas The liquid is discharged from a discharge port 16 provided at the center of the scroll 5 to an upper space 17 in the closed container 1.
フレーム７と密閉容器１の内側壁との間には、フレー
ム７の外周部に軸方向（上下方向）に延びる溝（18）を
設けることによって、前記の上部空間17中の冷媒ガスを
圧縮機部２の下方の空間へ導くための冷媒通路18が設け
られている。A groove (18) extending in the axial direction (vertical direction) is provided on the outer peripheral portion of the frame 7 between the frame 7 and the inner side wall of the closed casing 1 so that the refrigerant gas in the upper space 17 is compressed. A coolant passage 18 is provided for leading to a space below the part 2.
吸入管20は固定スクロール５の巻き終わり部22に駆動
軸９と平行方向に、Ｏリング23を介して固定スクロール
５と接続される。また吸入管20はフタキャップ1aに溶接
されている。固定スクロール５の巻き終わり22はＲ形状
に加工されている。第２図において旋回スクロール６の
巻き終わり部24は破線25の円運動を行う。固定スクロー
ル５内の吸入管20との接続は円筒部26を介して、固定ス
クロール５の巻き終わり22のＲ部と連通している。ま
た、円筒部26内にはスプリング27とピストン28が設けら
れている。又、ピストンの上面には細溝29を有してい
る。The suction pipe 20 is connected to the fixed scroll 5 via an O-ring 23 in a direction parallel to the drive shaft 9 at a winding end portion 22 of the fixed scroll 5. The suction pipe 20 is welded to the lid cap 1a. The winding end 22 of the fixed scroll 5 is processed into an R shape. In FIG. 2, the winding end portion 24 of the orbiting scroll 6 makes a circular motion indicated by a broken line 25. The connection with the suction pipe 20 in the fixed scroll 5 is communicated through a cylindrical portion 26 with the R portion of the winding end 22 of the fixed scroll 5. A spring 27 and a piston 28 are provided in the cylindrical portion 26. Further, the upper surface of the piston has a narrow groove 29.
次に動作について説明する。電動機３によりクランク
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、圧力差によりピストン28
が下方に押し下げられ、冷媒ガスは固定スクロール５と
旋回スクロール６との作用で圧縮された後、固定スクロ
ール５の中央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。この吐出された冷媒ガスは、
フレーム７に設けた通路18を通って圧縮機部の下方の空
間、すなわち、フレーム７と電動機３との間の空間に流
入し、吐出管21から密閉容器１の外に流出する。Next, the operation will be described. When the orbiting scroll orbits through the crankshaft 9 by the electric motor 3, the suction pipe
Refrigerant gas sucked in from 20 is moved to piston 28 by pressure difference.
Is depressed downward, the refrigerant gas is compressed by the action of the fixed scroll 5 and the orbiting scroll 6, and then discharged from a discharge port 16 provided at the center of the fixed scroll 5 into the upper space 17 of the sealed container 1. . This discharged refrigerant gas is
The gas flows into the space below the compressor section, that is, the space between the frame 7 and the electric motor 3, through the passage 18 provided in the frame 7, and flows out of the closed casing 1 from the discharge pipe 21.
また、停止時においては、スプリング27によって、ピ
ストン28は上方に押し上げられ、吸入管20の端面30がシ
ート面となりガスの逆流を防ぐ。Also, at the time of stop, the piston 28 is pushed upward by the spring 27, and the end face 30 of the suction pipe 20 becomes a sheet surface to prevent gas from flowing backward.
この状態からスクロールラップ内の圧力は、ピストン
側面31と円筒部26とのギャップから、ピストン上面に設
けた細溝29を経て吸入管20側へ徐々にバイパスされてい
く。（もちろん、吸入管の端面30に細溝を設けても同様
である。）このため、再起動時、スクロールラップ内圧
力と吸入管20の圧力はバランスされると共に、ラップ内
圧力も減圧されるため、起動負荷が低減出来る。From this state, the pressure in the scroll wrap is gradually bypassed from the gap between the piston side surface 31 and the cylindrical portion 26 to the suction pipe 20 side through the narrow groove 29 provided on the piston upper surface. (Of course, the same applies when a narrow groove is provided in the end face 30 of the suction pipe.) For this reason, at the time of restart, the pressure in the scroll wrap and the pressure in the suction pipe 20 are balanced and the pressure in the wrap is also reduced. Therefore, the starting load can be reduced.
又、他の実施例を第４図に示すが、ピストン28と多孔
質材料、または多孔質金属材料で製作しても同様の動作
となる。Although another embodiment is shown in FIG. 4, the same operation can be achieved even if the piston 28 is made of a porous material or a porous metal material.
本発明によれば、スクロール圧縮機において、起動時
の負荷が低減出来るため、軸受およびモータの信頼性を
向上することが出来る。ADVANTAGE OF THE INVENTION According to this invention, in a scroll compressor, since the load at the time of starting can be reduced, the reliability of a bearing and a motor can be improved.
第１図は本発明の一実施例の密閉形スクロール圧縮機の
全体構造断面図。第２図は吸入孔を設けた固定スクロー
ルと旋回スクロールの横断面図。 第３図は第１図の吸入管の部分の断面図。 第４図は他の実施例を示す吸入管部分の断面図である。 １……密閉容器、２……圧縮機部、３……電動機、４…
…油溜り、５……固定スクロール、６……旋回スクロー
ル、７……フレーム、９……クランク軸、15……中間圧
室、20……吸入管、26……円筒部、27……スプリング、
28……ピストン、29……細溝、30……吸入管端面。FIG. 1 is an overall structural sectional view of a hermetic scroll compressor according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of a fixed scroll provided with a suction hole and an orbiting scroll. FIG. 3 is a sectional view of a portion of the suction pipe in FIG. FIG. 4 is a sectional view of a suction pipe portion showing another embodiment. 1 ... closed container, 2 ... compressor part, 3 ... motor, 4 ...
... oil pool, 5 ... fixed scroll, 6 ... orbiting scroll, 7 ... frame, 9 ... crankshaft, 15 ... intermediate pressure chamber, 20 ... suction pipe, 26 ... cylindrical part, 27 ... spring ,
28 ... piston, 29 ... narrow groove, 30 ... suction pipe end face.
Claims (1)
固定スクロールから成るスクロール圧縮機構と、この圧
縮機構と電動機を駆動軸によって連結し、該駆動軸を支
承する軸受を設けたフレームを前記スクロール圧縮機構
部と電動機の間に配設して互いに連結固定して、密閉容
器内に収納し、該密閉容器内を高圧圧力雰囲気としたス
クロール圧縮機において、 固定スクロールの巻き終わり部に吸入孔および吸入管を
駆動軸方向に設け、該吸入孔の円筒部は旋回スクロール
の運動範囲外に設け、吸入孔に逆止弁を設け、圧縮機停
止時逆止弁を介して、前記吸入管側へ圧縮機構部の圧力
を減圧させる機構を有することを特徴とするスクロール
圧縮機。1. A scroll compression mechanism comprising a orbiting scroll and a fixed scroll which perform a relatively orbiting motion, a frame having a bearing connected to the compression mechanism and an electric motor by a drive shaft and provided with a bearing for supporting the drive shaft. A scroll compressor disposed between a compression mechanism and an electric motor, connected and fixed to each other, housed in a sealed container, and having a high-pressure atmosphere in the sealed container. A suction pipe is provided in the drive shaft direction, a cylindrical portion of the suction hole is provided outside the range of motion of the orbiting scroll, a check valve is provided in the suction hole, and the check valve is provided to the suction pipe through the check valve when the compressor is stopped. A scroll compressor having a mechanism for reducing the pressure of a compression mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1264921A JP2816201B2 (en) | 1989-10-13 | 1989-10-13 | Scroll compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1264921A JP2816201B2 (en) | 1989-10-13 | 1989-10-13 | Scroll compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03130588A JPH03130588A (en) | 1991-06-04 |
| JP2816201B2 true JP2816201B2 (en) | 1998-10-27 |
Family
ID=17410048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1264921A Expired - Lifetime JP2816201B2 (en) | 1989-10-13 | 1989-10-13 | Scroll compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2816201B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5496160A (en) * | 1995-07-03 | 1996-03-05 | Tecumseh Products Company | Scroll compressor having a suction check valve |
| JP4026099B2 (en) * | 1998-10-15 | 2007-12-26 | アネスト岩田株式会社 | Scroll fluid machinery |
| JP2006316852A (en) * | 2005-05-11 | 2006-11-24 | Saginomiya Seisakusho Inc | Pilot operated solenoid valve and heat exchange system using the same |
| JP6606889B2 (en) * | 2015-07-01 | 2019-11-20 | ダイキン工業株式会社 | Scroll compressor |
-
1989
- 1989-10-13 JP JP1264921A patent/JP2816201B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03130588A (en) | 1991-06-04 |
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