JPH07324695A - Horizontal closed compressor - Google Patents
Horizontal closed compressorInfo
- Publication number
- JPH07324695A JPH07324695A JP28712194A JP28712194A JPH07324695A JP H07324695 A JPH07324695 A JP H07324695A JP 28712194 A JP28712194 A JP 28712194A JP 28712194 A JP28712194 A JP 28712194A JP H07324695 A JPH07324695 A JP H07324695A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- oil tank
- housing
- compression mechanism
- 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.)
- Granted
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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
-
- 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
- F04C29/02—Lubrication; Lubricant separation
- F04C29/028—Means for improving or restricting lubricant flow
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は空気調和機等の冷媒回路
に組み込まれる横型密閉圧縮機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal hermetic compressor incorporated in a refrigerant circuit of an air conditioner or the like.
【０００２】[0002]
【従来の技術】図６には従来のこの種横型密閉圧縮機の
１例が示されている。水平に設置された樽状の密閉ハウ
ジング８の内部右側にはスクロール型圧縮機構Ｃが、左
側には電動モータＭが内蔵されている。2. Description of the Related Art FIG. 6 shows an example of a conventional horizontal hermetic compressor of this type. A horizontally closed barrel-shaped hermetic housing 8 has a scroll-type compression mechanism C on the right side and an electric motor M on the left side.
【０００３】スクロール型圧縮機構Ｃは固定スクロール
１、旋回スクロール２、旋回スクロール２の公転旋回運
動を許容するが、その自転を阻止するオルダムリング等
の自転阻止機構３、回転シャフト５、この回転シャフト
５を軸支する主軸受71及び副軸受72、旋回スクロール２
を支持する旋回軸受73及びスラスト軸受74等からなる。The scroll-type compression mechanism C permits the revolving orbiting motion of the fixed scroll 1, the orbiting scroll 2, and the orbiting scroll 2, but a rotation preventing mechanism 3 such as an Oldham ring for preventing its rotation, a rotating shaft 5, and this rotating shaft. 5, a main bearing 71 and a sub-bearing 72 that pivotally support 5, and an orbiting scroll 2
A swivel bearing 73 and a thrust bearing 74 for supporting the
【０００４】固定スクロール１は端板11とその内面に立
設されたうず巻体12とを備え、端板11には吐出ポート13
が設けられている。旋回スクロール２は端板21とこの内
面に立設されたうず巻体22とを備え、この端板21の外面
に立設されたボス23内にはドライブブッシュ25が旋回軸
受73を介して回転自在に嵌装されている。The fixed scroll 1 is provided with an end plate 11 and a vortex winding body 12 provided upright on the inner surface of the end plate 11. The end plate 11 has a discharge port 13
Is provided. The orbiting scroll 2 is provided with an end plate 21 and an eddy coil 22 that is erected on the inner surface of the end plate 21, and a drive bush 25 is rotated through a orbiting bearing 73 in a boss 23 that is erected on the outer surface of the end plate 21. It is fitted freely.
【０００５】このドライブブッシュ25に穿設された偏心
穴内には回転シャフト５の右端から突出する偏心ピン53
が回転自在に嵌合されている。An eccentric pin 53 protruding from the right end of the rotary shaft 5 is provided in an eccentric hole formed in the drive bush 25.
Is rotatably fitted.
【０００６】固定スクロール１と旋回スクロール２とを
相互に公転旋回半径だけ偏心させ、かつ、 180°だけ角
度をずらせて噛み合わせることによって、うず巻の中心
に対して点対称に複数個の密閉空間24が形成されてい
る。[0006] The fixed scroll 1 and the orbiting scroll 2 are eccentric to each other by the orbiting radius, and are meshed with each other by shifting the angle by 180 °, so that a plurality of closed spaces are point-symmetrical with respect to the center of the spiral. 24 are formed.
【０００７】電動モータＭを駆動することによって回転
シャフト５、偏心ピン53、ドライブブッシュ25、旋回軸
受73、ボス23を介して旋回スクロール２が駆動され、旋
回スクロール２は自転阻止機構３によって自転を阻止さ
れながら公転旋回半径の円軌道上を公転旋回運動する。By driving the electric motor M, the orbiting scroll 2 is driven via the rotary shaft 5, the eccentric pin 53, the drive bush 25, the orbiting bearing 73, and the boss 23, and the orbiting scroll 2 is rotated by the rotation preventing mechanism 3. While being blocked, it makes a revolution revolution motion on a circular orbit of revolution revolution radius.
【０００８】すると、ガスが吸入管82を経て密閉ハウジ
ング８内に入り、電動モータＭを冷却した後、フレーム
６に穿設された図示しない通路を通って密閉空間24内に
吸入される。そして、旋回スクロール２の公転旋回運動
により密閉空間24の容積が減少するのに伴って圧縮され
ながらうず巻の中央部に至り、吐出ポート13より吐出弁
17を押し開いて吐出キャビティー14に入り、ここから吐
出管83を経て外部に吐出される。Then, the gas enters the sealed housing 8 through the suction pipe 82, cools the electric motor M, and is then sucked into the sealed space 24 through a passage (not shown) formed in the frame 6. Then, as the volume of the closed space 24 decreases due to the orbiting movement of the orbiting scroll 2, the compressed space reaches the central portion of the vortex while being compressed, and the discharge valve is discharged from the discharge port 13.
17 is pushed open to enter the discharge cavity 14, from which it is discharged to the outside via the discharge pipe 83.
【０００９】密閉ハウジング８の外部下方には樽状の油
タンク９が水平に設置され、この油タンク９は密閉ハウ
ジング８と連結管92及び吸上管93によって互いに接続さ
れている。A barrel-shaped oil tank 9 is horizontally installed below the outside of the closed housing 8, and the oil tank 9 is connected to the closed housing 8 by a connecting pipe 92 and a suction pipe 93.
【００１０】しかして、圧縮機の運転時、回転シャフト
５の軸端に設けられた油ポンプ91が駆動されると、油タ
ンク９内の潤滑油は吸上管93内を通って吸い上げられ、
この油ポンプ91によって付勢される。そして、回転シャ
フト５の内部に穿設された油路94を通ってスクロール型
圧縮機構Ｃの所要潤滑個所を潤滑した後、密閉ハウジン
グ８内底部に滴下する。密閉ハウジング８内底部に滴下
した潤滑油は連結管92内を通って油タンク９内に入り、
この中に貯溜される。When the oil pump 91 provided at the shaft end of the rotary shaft 5 is driven during operation of the compressor, the lubricating oil in the oil tank 9 is sucked up through the suction pipe 93,
This oil pump 91 is energized. Then, after lubricating a required lubrication point of the scroll type compression mechanism C through an oil passage 94 bored inside the rotary shaft 5, it is dripped on the inner bottom portion of the hermetic housing 8. The lubricating oil dripping on the inner bottom of the closed housing 8 passes through the inside of the connecting pipe 92 and enters the oil tank 9,
It is stored in this.
【００１１】[0011]
【発明が解決しようとする課題】上記従来の横型密閉圧
縮機を長時間停止すると、潤滑油中に多量の冷媒が溶け
込む。この状態で圧縮機を起動すると、油ポンプ91は潤
滑油から蒸発した冷媒ガスを吸入するため、所要潤滑個
所に潤滑油を十分に供給できず、潤滑不良やこれに基づ
く焼付きを惹起するおそれがあった。When the conventional horizontal hermetic compressor is stopped for a long time, a large amount of refrigerant dissolves in the lubricating oil. When the compressor is started in this state, the oil pump 91 sucks the refrigerant gas evaporated from the lubricating oil, so that the lubricating oil cannot be sufficiently supplied to the required lubrication point, which may cause poor lubrication or seizure due to this. was there.
【００１２】[0012]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、第１の発明の要旨
とするところは、圧縮機構及び電動モータを内蔵し、運
転時低圧となる横置の密閉ハウジングとその外部下方に
設置された油タンクとを吸上管及び上記密閉ハウジング
内の油を上記油タンク内へ戻す連結管を介して接続する
とともに運転時に駆動される油ポンプにより上記油タン
ク内の油を上記吸上管を通して吸い上げて上記圧縮機構
の所要潤滑個所へ給油する横型密閉圧縮機において、起
動時における上記密閉ハウジング内の圧力降下によって
上記連結管の通路を閉じる逆止弁機構を設けたことを特
徴とする横型密閉圧縮機にある。SUMMARY OF THE INVENTION The present invention has been invented to solve the above problems, and the gist of the first invention is that it has a built-in compression mechanism and an electric motor, and has a low pressure during operation. The horizontal sealed housing and the oil tank installed below the outside are connected via a suction pipe and a connecting pipe for returning the oil in the sealed housing to the oil tank, and the oil driven during operation. In a horizontal hermetic compressor that pumps oil in the oil tank through the suction pipe to supply oil to a required lubrication point of the compression mechanism, the passage of the connecting pipe is closed by a pressure drop in the hermetic housing at startup. This is a horizontal hermetic compressor characterized by being provided with a check valve mechanism.
【００１３】上記逆止弁機構は上記油タンク内から上記
連結管を通って上記密閉ハウジング内に逆流するガスに
より持ち上げられて上記連結管内の通路を閉止するボー
ルを備えることができる。The check valve mechanism may include a ball that is lifted by gas flowing back from the oil tank through the connecting pipe into the closed housing to close a passage in the connecting pipe.
【００１４】上記圧縮機構をスクロール型圧縮機構から
構成し、このスクロール型圧縮機構と電動モータとを連
結する回転シャフトによって上記油ポンプを駆動するこ
とができる。The compression mechanism may be composed of a scroll type compression mechanism, and the oil pump can be driven by a rotary shaft connecting the scroll type compression mechanism and an electric motor.
【００１５】上記逆止弁機構は起動時における上記密閉
ハウジング内の圧力降下によって弁座に着座する平板弁
を備えることができる。The check valve mechanism may include a flat valve which is seated on a valve seat due to a pressure drop in the closed housing at the time of starting.
【００１６】第２の発明の要旨とするところは、圧縮機
構及び電動モータを内蔵し、運転時低圧となる横置の密
閉ハウジングとその外部下方に設置された油タンクとを
吸上管及び上記密閉ハウジング内の油を上記油タンク内
へ戻す連結管を介して接続するとともに運転時に駆動さ
れる油ポンプにより上記油タンク内の油を上記吸上管を
通して吸い上げて上記圧縮機構の所要潤滑個所へ給油す
る横型密閉圧縮機において、起動時における上記密閉ハ
ウジング内の圧力降下によって上記油タンクの上記連結
管への接続口を閉止するリード弁を上記油タンクの胴壁
内面に取り付けたことを特徴とする横型密閉圧縮機にあ
る。The gist of the second invention is that a compression mechanism and an electric motor are built-in, and a horizontal sealed housing which has a low pressure during operation and an oil tank installed below the suction housing are installed in the suction pipe and the above. The oil in the closed housing is connected to the oil tank via a connecting pipe, and the oil pump driven during operation sucks up the oil in the oil tank through the suction pipe to the required lubrication point of the compression mechanism. In a horizontal hermetic compressor for refueling, a reed valve for closing a connection port of the oil tank to the connecting pipe due to a pressure drop in the hermetic housing at startup is attached to an inner surface of a body wall of the oil tank. It is in a horizontal hermetic compressor.
【００１７】第３の発明の要旨とするところは、圧縮機
構及び電動モータを内蔵し、運転時低圧となる横置の密
閉ハウジングとその外部下方に設置された油タンクとを
吸上管及び上記密閉ハウジング内の油を上記油タンク内
へ戻す連結管を介して接続するとともに運転時に駆動さ
れる油ポンプにより上記油タンク内の油を上記吸上管を
通して吸い上げて上記圧縮機構の所要潤滑個所へ給油す
る横型密閉圧縮機において、上記圧縮機構及び油ポンプ
がインバータ駆動の電動モータによって低速で起動さ
れ、上記油タンクを加熱するヒータと、上記油タンク内
の圧力上昇によって閉じる逆止弁機構を備えることを特
徴とする横型密閉圧縮機にある。The gist of the third invention is that a compression mechanism and an electric motor are built-in, and a horizontal sealed housing which has a low pressure during operation and an oil tank installed below the suction housing are installed in the suction pipe and the above. The oil in the closed housing is connected to the oil tank via a connecting pipe, and the oil pump driven during operation sucks up the oil in the oil tank through the suction pipe to the required lubrication point of the compression mechanism. In a horizontal hermetic compressor for refueling, the compression mechanism and the oil pump are started at a low speed by an electric motor driven by an inverter, and are provided with a heater for heating the oil tank, and a check valve mechanism that closes due to a pressure increase in the oil tank. The horizontal hermetic compressor is characterized by that.
【００１８】[0018]
【作用】請求項１記載の発明においては、圧縮機の起動
によって密閉ハウジング内の圧力が降下すると、逆止弁
機構が閉じ油タンク内の圧力と密閉ハウジング内の圧力
との間に圧力差が生じる。この圧力差によって油タンク
内の油は吸上管を通って油ポンプ内に強制的に送り込ま
れる。According to the first aspect of the present invention, when the pressure in the hermetically sealed housing drops due to the activation of the compressor, the check valve mechanism closes and a pressure difference occurs between the pressure in the oil tank and the pressure in the hermetically sealed housing. Occurs. Due to this pressure difference, the oil in the oil tank is forcibly fed into the oil pump through the suction pipe.
【００１９】請求項２記載の発明においては、圧縮機の
起動によって密閉ハウジング内の圧力が降下すると、油
タンク内から連結管を通って密閉ハウジング内に逆流す
るガスによってボールが持ち上げられることにより連結
管の通路が閉止されて逆止弁機構が閉じる。According to the second aspect of the present invention, when the pressure in the hermetically sealed housing drops due to the activation of the compressor, the balls are lifted by the gas that flows back from the oil tank through the connecting pipe into the hermetically sealed housing. The passage of the pipe is closed and the check valve mechanism is closed.
【００２０】請求項３記載の発明においては、圧縮機を
起動すると、電動モータによってスクロール型圧縮機構
及び油ポンプが回転シャフトを介して駆動される。According to the third aspect of the invention, when the compressor is started, the scroll type compression mechanism and the oil pump are driven by the electric motor via the rotary shaft.
【００２１】請求項４記載の発明においては、圧縮機の
起動によって密閉ハウジング内の圧力が降下すると、平
板弁が弁座に着座することにより逆止弁機構が閉じる。According to the fourth aspect of the invention, when the pressure in the hermetically sealed housing drops due to activation of the compressor, the check valve mechanism is closed by the flat valve seating on the valve seat.
【００２２】請求項５記載の発明においては、圧縮機の
起動時によって密閉ハウジング内の圧力が降下すると、
リード弁によって油タンクの連結管への接続口が閉止さ
れることにより逆止弁機構が閉じる。According to the fifth aspect of the invention, when the pressure in the hermetically sealed housing drops when the compressor is started,
The check valve mechanism is closed by closing the connection port to the connecting pipe of the oil tank by the reed valve.
【００２３】請求項６記載の発明においては、圧縮機の
起動前に油タンクをヒータによって加熱すると、油タン
ク内の油に溶解している冷媒がガス化して油タンク内上
部に溜り油タンク内の圧力が上昇する。これによって油
タンク内の圧力と密閉ハウジング内の圧力との間に圧力
差が生じ、この圧力差によって逆止弁機構が閉じるとと
もに油タンク内の油は吸上管を通って油ポンプ内に強制
的に送り込まれる。しかる後、インバータ駆動の電動モ
ータによって圧縮機構及び油ポンプが低速で起動され
る。According to the sixth aspect of the invention, when the oil tank is heated by the heater before the compressor is started, the refrigerant dissolved in the oil in the oil tank is gasified and accumulated in the upper part of the oil tank. Pressure rises. This causes a pressure difference between the pressure inside the oil tank and the pressure inside the closed housing.This pressure difference closes the check valve mechanism and forces the oil in the oil tank through the suction pipe into the oil pump. Sent in. After that, the compression mechanism and the oil pump are started at a low speed by the electric motor driven by the inverter.
【００２４】[0024]
【実施例】本発明の１実施例が図１に示されている。図
１に示すように、密閉ハウジング８内の潤滑油を油タン
ク９内に戻すための連結管92内に逆止弁機構100 が設け
られている。DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIG. As shown in FIG. 1, a check valve mechanism 100 is provided in a connecting pipe 92 for returning the lubricating oil in the closed housing 8 into the oil tank 9.
【００２５】この逆止弁機構100 は逆止ボール101 、弁
座102 、リテーナ103 からなり、弁座102 には通口104
が設けられ、リテーナ103 にも多数の穴105 が穿設され
ている。他の構成は図６に示す従来のものと同様であ
る。The check valve mechanism 100 comprises a check ball 101, a valve seat 102 and a retainer 103, and the valve seat 102 has a through hole 104.
The retainer 103 is also provided with a large number of holes 105. Other configurations are similar to those of the conventional one shown in FIG.
【００２６】しかして、圧縮機を長時間停止すると、密
閉ハウジング８内の圧力と油タンク９内の圧力は等しく
なる。圧縮機を長時間停止した後起動すると、電動モー
タＭによって圧縮機構Ｃ及び油ポンプ91が駆動される。
これによって密閉ハウジング８内のガスがスクロール型
圧縮機構Ｃの密閉空間24内に吸入されるので、密閉ハウ
ジング８内の圧力は下降し始める。However, when the compressor is stopped for a long time, the pressure inside the closed housing 8 becomes equal to the pressure inside the oil tank 9. When the compressor is stopped for a long time and then started, the electric motor M drives the compression mechanism C and the oil pump 91.
As a result, the gas in the closed housing 8 is sucked into the closed space 24 of the scroll compression mechanism C, so that the pressure in the closed housing 8 starts to drop.
【００２７】一方、油タンク９内の圧力は圧縮機の停止
中と変わらないため、密閉ハウジング８内の圧力と油タ
ンク９内の圧力との間に圧力差が生じる。On the other hand, since the pressure in the oil tank 9 is the same as when the compressor is stopped, there is a pressure difference between the pressure in the closed housing 8 and the pressure in the oil tank 9.
【００２８】この圧力差により油タンク９内のガスが連
結管92、リテーナ103 の多数の穴105 、弁座102 の通路
104 を通って密閉ハウジング８内に逆流し、このガス流
れによって逆止弁機構100 の逆止ボール101 が持ち上げ
られて弁座102 に着座し、そのガス通路104 を閉止す
る。Due to this pressure difference, the gas in the oil tank 9 is connected to the connecting pipe 92, the many holes 105 of the retainer 103, and the passage of the valve seat 102.
The check valve 101 of the check valve mechanism 100 is lifted and seated on the valve seat 102 by the gas flow, and the gas passage 104 is closed.
【００２９】これによって密閉ハウジング８内の圧力と
油タンク９内の圧力との圧力差が増大し、この圧力差に
よって油タンク９内に貯溜されている潤滑油はこの中に
多量の冷媒が溶け込んでいても吸上管93を通って油ポン
プ91内に強制的に送り込まれて油ポンプ91によって付勢
されて所要潤滑個所に供給される。As a result, the pressure difference between the pressure in the closed housing 8 and the pressure in the oil tank 9 increases, and due to this pressure difference, a large amount of the refrigerant melts into the lubricating oil stored in the oil tank 9. Even though, it is forcibly sent into the oil pump 91 through the suction pipe 93, is urged by the oil pump 91, and is supplied to the required lubrication point.
【００３０】油タンク９内の潤滑油の量が少なくなるこ
とによってその内部の圧力が低下すると、逆止弁機構10
0 の逆止ボール101 はその自重によって落下してガス通
路104 を開き、リテーナ103 上に保持される。これによ
って密閉ハウジング８内底部に滴下した潤滑油が逆止弁
機構100 の弁座102 の通口104 、リテーナ103 の多数の
穴105 を通り、連結管92を経て油タンク９内に入り、こ
の内部に貯溜される。When the internal pressure of the oil tank 9 decreases due to a decrease in the amount of lubricating oil in the oil tank 9, the check valve mechanism 10
The non-return ball 101 of 0 falls due to its own weight, opens the gas passage 104, and is retained on the retainer 103. As a result, the lubricating oil dripping on the bottom of the closed housing 8 passes through the through hole 104 of the valve seat 102 of the check valve mechanism 100 and the multiple holes 105 of the retainer 103, and enters the oil tank 9 through the connecting pipe 92. It is stored inside.
【００３１】本発明の第２の実施例が図２に示されてい
る。図２に示すように、連結管92の油タンク９側端部に
逆止弁機構110 が取り付けられている。この逆止弁機構
110 は薄肉鋼板からなる円形状の平板弁111 、弁座112
、弁座112 と連結管92を繋ぐための外筒113 、キャッ
プ状の弁押え114 からなり、弁座112 には通路115 が設
けられ、弁押え114 にも多数の孔116 が穿設されてい
る。他の構成は図６に示す従来のものと同様であり、対
応する部材には同じ符号が付されている。A second embodiment of the invention is shown in FIG. As shown in FIG. 2, a check valve mechanism 110 is attached to the end of the connecting pipe 92 on the oil tank 9 side. This check valve mechanism
110 is a circular flat plate valve valve 111 and valve seat 112 made of thin steel plate.
An outer cylinder 113 for connecting the valve seat 112 and the connecting pipe 92, and a cap-shaped valve retainer 114. The valve seat 112 is provided with a passage 115, and the valve retainer 114 is also provided with many holes 116. There is. Other configurations are similar to those of the conventional one shown in FIG. 6, and corresponding members are designated by the same reference numerals.
【００３２】圧縮機を長時間停止後起動すると、密閉ハ
ウジング８内の圧力は下降し始める。一方、油タンク９
内の圧力は圧縮機の停止中と変わらないため、密閉ハウ
ジング８内の圧力と油タンク９内の圧力との間に圧力差
が生じる。この圧力差により逆止弁機構110 の平板弁11
1 が吸引されて弁座112 に着座してガス通路115 は閉止
される。When the compressor is started after being stopped for a long time, the pressure in the closed housing 8 starts to drop. On the other hand, oil tank 9
Since the internal pressure is the same as when the compressor is stopped, there is a pressure difference between the internal pressure of the closed housing 8 and the internal pressure of the oil tank 9. Due to this pressure difference, the flat valve 11 of the check valve mechanism 110
1 is sucked and seated on the valve seat 112, and the gas passage 115 is closed.
【００３３】これによって密閉ハウジング８内の圧力と
油タンク９内との圧力差が増大し、この圧力差によって
油タンク９内に貯溜されている潤滑油はこの中に多量の
冷媒が溶け込んでいても吸上管93を通って油ポンプ19内
に強制的に送り込まれる。As a result, the pressure difference between the pressure in the closed housing 8 and the oil tank 9 increases, and the lubricating oil stored in the oil tank 9 has a large amount of refrigerant dissolved therein due to this pressure difference. Is forcedly sent into the oil pump 19 through the suction pipe 93.
【００３４】油タンク９内の潤滑油の量が少なくなるこ
とによってその内部の圧力が低下すると、油タンク９内
の圧力と密閉ハウジング８内の圧力との間の圧力差がな
くなるとともに密閉ハウジング８内底部に滴下した潤滑
油が連結管92内に溜まることにより生ずるヘット圧が平
板弁111 に負荷されるので、平板弁111 は弁座112 から
離間して弁押え114 に保持される。When the internal pressure of the oil tank 9 decreases due to a decrease in the amount of lubricating oil in the oil tank 9, there is no pressure difference between the pressure in the oil tank 9 and the pressure in the closed housing 8 and the closed housing 8 Since the flat pressure generated by the lubricating oil dripping on the inner bottom is accumulated in the connecting pipe 92, the flat plate valve 111 is loaded, so that the flat plate valve 111 is separated from the valve seat 112 and held by the valve retainer 114.
【００３５】これによって密閉ハウジング８内底部に滴
下した潤滑油が連結管92、逆止弁機構110 の弁座112 の
通路115 、弁押え114 の多数の穴116 を通り、油タンク
９内に入り、この内部に貯溜される。As a result, the lubricating oil dripping on the inner bottom of the closed housing 8 passes through the connecting pipe 92, the passage 115 of the valve seat 112 of the check valve mechanism 110, and the many holes 116 of the valve retainer 114 and enters the oil tank 9. , Stored inside this.
【００３６】本発明の第３の実施例が図３に示されてい
る。この第３の実施例においては、逆止弁機構110 の平
板弁117 は厚板をその軽量化のため内部を中空にくり抜
いて構成されている。このようにすると、平板弁117 が
弁押え114 内で傾斜するのを防止しうる。A third embodiment of the invention is shown in FIG. In the third embodiment, the flat valve 117 of the check valve mechanism 110 is formed by hollowing out a thick plate to reduce its weight. In this way, the flat plate valve 117 can be prevented from tilting in the valve retainer 114.
【００３７】なお、図２、図３において、逆止弁機構11
0 は水平に取り付けられているが、垂直に取り付けても
よい。また、加工の容易のため外筒113 を設けたが、外
筒113 を省略し、弁座112 を直接連結管92に取付けるこ
ともできる。In FIGS. 2 and 3, the check valve mechanism 11
0 is mounted horizontally, but may be mounted vertically. Further, although the outer cylinder 113 is provided for easy processing, the outer cylinder 113 may be omitted and the valve seat 112 may be directly attached to the connecting pipe 92.
【００３８】本発明の第４の実施例が図４に示され、
(A) は部分的縦断面図、(B) はリード弁の展開図であ
る。図４(A) 、(B) において、120 は薄肉鋼板からなる
リード弁で、油タンク９の内壁面に沿うように断面円弧
状に弯曲されている。そして、その先端円形部120aが油
タンク９の連結管92への接続口を塞ぎ、他端120bがスポ
ット熔接等の方法によって油タンク９の胴壁内面に取り
付けられている。他の構成は図６に示す従来のものと同
様である。A fourth embodiment of the invention is shown in FIG.
(A) is a partial longitudinal sectional view, and (B) is a development view of the reed valve. In FIGS. 4 (A) and 4 (B), 120 is a reed valve made of a thin steel plate, which is curved in an arc shape in cross section along the inner wall surface of the oil tank 9. The tip circular portion 120a closes the connection port of the oil tank 9 to the connecting pipe 92, and the other end 120b is attached to the inner surface of the body wall of the oil tank 9 by a method such as spot welding. Other configurations are similar to those of the conventional one shown in FIG.
【００３９】しかして、圧縮機の起動によって密閉ハウ
ジング８内の圧力が低下し、密閉ハウジング８内の圧力
と油タンク９内の圧力との間に圧力差が生じると、この
圧力差によりリード弁120 が吸引されて油タンク９の胴
壁内面に密着し、その円形部120aが連結管92への接続口
を閉止する。これによって油タンク９内に貯溜されてい
る潤滑油は吸上管93を通って油ポンプ91内に強制的に送
り込まれる。However, when the pressure in the hermetically sealed housing 8 decreases due to the activation of the compressor and a pressure difference occurs between the pressure in the hermetically sealed housing 8 and the pressure in the oil tank 9, the reed valve is caused by this pressure difference. 120 is suctioned and adheres to the inner surface of the barrel wall of the oil tank 9, and the circular portion 120a closes the connection port to the connecting pipe 92. As a result, the lubricating oil stored in the oil tank 9 is forced into the oil pump 91 through the suction pipe 93.
【００４０】油タンク９内の圧力が低下し、潤滑油が連
結管９２内に溜まると、リード弁120 は図４(A) に点線
で示すように変形して、連結管92への接続口を開く。こ
れによって、密閉ハウジング８内底部に滴下した潤滑油
が連結管92を通って、図４(A) に矢印で示すように油タ
ンク９内に入り、この内部に貯溜される。When the pressure in the oil tank 9 is reduced and the lubricating oil is accumulated in the connecting pipe 92, the reed valve 120 is deformed as shown by the dotted line in FIG. open. As a result, the lubricating oil dripping on the bottom of the closed housing 8 passes through the connecting pipe 92, enters the oil tank 9 as indicated by the arrow in FIG. 4 (A), and is stored therein.
【００４１】図５には本発明の第５の実施例が示されて
いる。図５において、８は密閉ハウジング、９は油タン
ク、92は連結管、130 は逆止弁機構で、樹脂製ボール13
1 、弁座132 、リテーナ133 からなる。93は吸上げ管、
95は油タンク９の外周に取付けられた電気ヒータであ
る。圧縮機構Ｃ及び油ポンプ91はインバータ駆動の電動
モータＭによって低速で起動されるようになっている。
他の構成は図６に示す従来のものと同様である。FIG. 5 shows a fifth embodiment of the present invention. In FIG. 5, 8 is a closed housing, 9 is an oil tank, 92 is a connecting pipe, 130 is a check valve mechanism, and a resin ball 13
It consists of 1, valve seat 132 and retainer 133. 93 is a suction pipe,
Reference numeral 95 is an electric heater attached to the outer circumference of the oil tank 9. The compression mechanism C and the oil pump 91 are activated at low speed by an electric motor M driven by an inverter.
Other configurations are similar to those of the conventional one shown in FIG.
【００４２】しかして、ボール131 は油の比重より軽い
樹脂からなるので、油タンク９内に油が充満している場
合にはボール131 は上昇して弁座132 に当接し、逆止弁
機構130 は閉止している。Since the ball 131 is made of a resin lighter than the specific gravity of oil, when the oil tank 9 is filled with oil, the ball 131 rises and comes into contact with the valve seat 132, and the check valve mechanism is formed. 130 is closed.
【００４３】圧縮機の起動前に電気ヒータ95に通電する
ことによって油タンク９を加熱すると、この内部に貯溜
されている潤滑油中に溶け込んだ液冷媒が蒸発して油タ
ンク９内上部に溜まる。これによって油タンク内の圧力
が密閉ハウジング８内の圧力より上昇し、ボール131 は
弁座132 に押し付けられる。これによって、油タンク９
内に貯溜されている潤滑油が吸上げ管９を通って油ポン
プ91に押し込まれる。When the oil tank 9 is heated by energizing the electric heater 95 before starting the compressor, the liquid refrigerant dissolved in the lubricating oil stored inside the oil tank evaporates and collects in the upper portion of the oil tank 9. . As a result, the pressure in the oil tank rises above the pressure in the closed housing 8, and the ball 131 is pressed against the valve seat 132. As a result, the oil tank 9
Lubricating oil stored therein is pushed into the oil pump 91 through the suction pipe 9.
【００４４】しかる後、インバータ駆動モータＭによっ
て圧縮機構Ｃ及び油ポンプ91を起動すれば、これらの回
転数が徐々に上昇しても油ポンプ91は油で満たされてい
るので、油ポンプ91は正常に作動して油を所要の潤滑個
所に給油することができる。従って、この第５の実施例
においては、電動モータＭがインバータ駆動で、その起
動時、圧縮機構Ｃ及び油ポンプ91の回転数が徐々に上昇
する場合であっても圧縮機の起動時における潤滑不良を
防止できる。After that, if the compression mechanism C and the oil pump 91 are started by the inverter drive motor M, the oil pump 91 is filled with oil even if the rotational speeds thereof gradually increase. It can operate normally to supply oil to required lubrication points. Therefore, in the fifth embodiment, the electric motor M is driven by an inverter, and even when the rotation speeds of the compression mechanism C and the oil pump 91 gradually increase at the time of startup, the lubrication at startup of the compressor is performed. Defects can be prevented.
【００４５】[0045]
【発明の効果】請求項１記載の発明においては、圧縮機
の起動時、密閉ハウジング内の圧力低下により逆止弁機
構が閉じると、油タンク内の圧力と密閉ハウジング内の
圧力との間に生じる圧力差によって油タンク内の油が吸
上管を通って油ポンプ内に強制的に送り込まれる。この
結果、圧縮機を長時間停止することによって油タンク内
の油中に多量の冷媒が溶け込んでいてもこの油を油ポン
プに送り込むことができるので、圧縮機の起動時におけ
る所要潤滑個所の潤滑不良及びこれに基づく焼付き等の
事故を未然に防止できる。According to the first aspect of the present invention, when the check valve mechanism is closed due to the pressure drop in the closed housing at the time of starting the compressor, the check valve mechanism is closed between the pressure in the oil tank and the pressure in the closed housing. The generated pressure difference forces the oil in the oil tank into the oil pump through the suction pipe. As a result, even if a large amount of refrigerant is dissolved in the oil in the oil tank by stopping the compressor for a long time, this oil can be sent to the oil pump, so that lubrication at the required lubrication points when starting the compressor It is possible to prevent defects and accidents such as seizure due to the defects.
【００４６】請求項２記載の発明においては、圧縮機の
起動によって密閉ハウジング内の圧力が油タンク内の圧
力より低下すると、油タンク内から連結管を通って密閉
ハウジング内に逆流するガスによって逆止弁機構のボー
ルが持ち上げられて連結管内の通路が閉止され逆止弁機
構が閉じる。According to the second aspect of the invention, when the pressure in the hermetically sealed housing becomes lower than the pressure in the oil tank due to the activation of the compressor, the gas is reversely flowed from the oil tank through the connecting pipe into the hermetically sealed housing. The ball of the stop valve mechanism is lifted to close the passage in the connecting pipe and close the check valve mechanism.
【００４７】請求項３記載の発明においては、スクロー
ル型圧縮機構及び油ポンプは電動モータにより回転シヤ
フトを介して駆動される。According to the third aspect of the present invention, the scroll type compression mechanism and the oil pump are driven by the electric motor through the rotary shaft.
【００４８】請求項４記載の発明においては、圧縮機の
起動時、密閉ハウジング内の圧力が降下すると、逆止弁
機構の平板弁が弁座に着座して逆止弁機構が閉じる。従
って、この逆止弁機構を用いれば、その通路面積が大き
い場合であっても軽量、大形の平板弁を確実に作動させ
ることができるので、圧縮機の大形化に資することがで
きる。According to the fourth aspect of the invention, when the pressure in the hermetically sealed housing drops at the time of starting the compressor, the flat valve of the check valve mechanism is seated on the valve seat to close the check valve mechanism. Therefore, if this check valve mechanism is used, even if the passage area is large, a lightweight and large flat valve can be reliably operated, which contributes to the enlargement of the compressor.
【００４９】請求項５記載の発明においては、圧縮機の
起動時、密閉ハウジング内の圧力が降下すると、逆止弁
機構のリード弁が油タンクの連結管への接続口を閉止す
る。従って、この逆止弁機構を用いれば、その通路面積
が大きい場合であっても軽量、大形のリード弁を確実に
作動させることができるので、圧縮機の大形化に資する
ことができる。According to the fifth aspect of the invention, when the pressure in the hermetically sealed housing drops at the time of starting the compressor, the reed valve of the check valve mechanism closes the connection port to the connecting pipe of the oil tank. Therefore, if this check valve mechanism is used, even if the passage area is large, a lightweight and large reed valve can be reliably operated, which contributes to the enlargement of the compressor.
【００５０】請求項６記載の発明においては、起動前に
油タンクをヒータにより加熱することによって油タンク
内の圧力が密閉ハウジング内の圧力より上昇し、これに
よって逆止弁機構が閉じるとともに油タンク内の油が油
ポンプに押し込まれる。従って、起動時、圧縮機構及び
油ポンプがインバータ駆動の電動モータによって駆動さ
れることにより徐々に回転数が上昇する場合であっても
油ポンプは正常に作動して油を吐出するので、起動時に
おける潤滑不良を防止できる。In the sixth aspect of the present invention, the pressure in the oil tank rises above the pressure in the closed housing by heating the oil tank by the heater before starting, whereby the check valve mechanism is closed and the oil tank is closed. The oil inside is pushed into the oil pump. Therefore, at startup, the oil pump operates normally and discharges oil even when the compression mechanism and the oil pump are driven by an electric motor driven by an inverter to gradually increase the rotational speed. It is possible to prevent poor lubrication.
【図１】本発明の第１の実施例を示す部分的縦断面図で
ある。FIG. 1 is a partial vertical cross-sectional view showing a first embodiment of the present invention.
【図２】本発明の第２の実施例を示す部分的縦断面図で
ある。FIG. 2 is a partial vertical cross-sectional view showing a second embodiment of the present invention.
【図３】本発明の第３の実施例を示す部分的縦断面図で
ある。FIG. 3 is a partial vertical sectional view showing a third embodiment of the present invention.
【図４】本発明の第４の実施例を示し、(A) は部分的縦
断面図、(B) はリード弁の展開図である。FIG. 4 shows a fourth embodiment of the present invention, (A) is a partial longitudinal sectional view, and (B) is a development view of a reed valve.
【図５】本発明の第５の実施例を示す部分的縦断面図で
ある。FIG. 5 is a partial vertical cross-sectional view showing a fifth embodiment of the present invention.
【図６】従来の横型密閉圧縮機の一部を破断して示す側
面図である。FIG. 6 is a side view showing a part of a conventional horizontal hermetic compressor in a cutaway manner.
Ｃ 圧縮機構 Ｍ 電動モータ ８ 密閉ハウジング ９ 油タンク 92 連結管 93 吸入管 100 逆止弁機構 C Compression mechanism M Electric motor 8 Closed housing 9 Oil tank 92 Connection pipe 93 Suction pipe 100 Check valve mechanism
Claims (6)
時低圧となる横置の密閉ハウジングとその外部下方に設
置された油タンクとを吸上管及び上記密閉ハウジング内
の油を上記油タンク内へ戻す連結管を介して接続すると
ともに運転時に駆動される油ポンプにより上記油タンク
内の油を上記吸上管を通して吸い上げて上記圧縮機構の
所要潤滑個所へ給油する横型密閉圧縮機において、起動
時における上記密閉ハウジング内の圧力降下によって上
記連結管の通路を閉じる逆止弁機構を設けたことを特徴
とする横型密閉圧縮機。1. A suction pipe for a horizontal hermetically-sealed housing having a compression mechanism and an electric motor, which is at a low pressure during operation, and an oil tank provided below the outer housing, and the oil in the hermetically-sealed housing for the oil tank. Starting in a horizontal hermetic compressor that is connected via a connecting pipe that returns to the inside, and sucks the oil in the oil tank through the suction pipe by an oil pump that is driven during operation to supply oil to the required lubrication points of the compression mechanism. A horizontal hermetic compressor comprising a check valve mechanism for closing the passage of the connecting pipe by a pressure drop in the hermetic housing at the time.
記連結管を通って上記密閉ハウジング内に逆流するガス
により持ち上げられて上記連結管内の通路を閉止するボ
ールを備えることを特徴とする請求項１記載の横型密閉
圧縮機。2. The check valve mechanism includes a ball that is lifted by gas flowing back from the oil tank through the connecting pipe into the closed housing to close a passage in the connecting pipe. The horizontal hermetic compressor according to claim 1.
らなり、上記油ポンプが上記スクロール型圧縮機構と電
動モータとを連結する回転シャフトによって駆動される
ことを特徴とする請求項１記載の横型密閉圧縮機。3. The horizontal hermetic seal according to claim 1, wherein the compression mechanism is a scroll compression mechanism, and the oil pump is driven by a rotary shaft connecting the scroll compression mechanism and an electric motor. Compressor.
閉ハウジング内の圧力降下によって弁座に着座する平板
弁を備えることを特徴とする請求項１記載の横型密閉圧
縮機。4. The horizontal hermetic compressor according to claim 1, wherein the check valve mechanism includes a flat valve seated on a valve seat due to a pressure drop in the hermetic housing at startup.
時低圧となる横置の密閉ハウジングとその外部下方に設
置された油タンクとを吸上管及び上記密閉ハウジング内
の油を上記油タンク内へ戻す連結管を介して接続すると
ともに運転時に駆動される油ポンプにより上記油タンク
内の油を上記吸上管を通して吸い上げて上記圧縮機構の
所要潤滑個所へ給油する横型密閉圧縮機において、起動
時における上記密閉ハウジング内の圧力降下によって上
記油タンクの上記連結管への接続口を閉止するリード弁
を上記油タンクの胴壁内面に取り付けたことを特徴とす
る横型密閉圧縮機。5. A suction pipe for sucking a horizontal hermetically-sealed housing having a compression mechanism and an electric motor, which is at a low pressure during operation, and an oil tank installed below the outer housing, and the oil in the hermetically-sealed housing to the oil tank. Starting in a horizontal hermetic compressor that is connected via a connecting pipe that returns to the inside, and sucks the oil in the oil tank through the suction pipe by an oil pump that is driven during operation to supply oil to the required lubrication points of the compression mechanism. A horizontal hermetic compressor characterized in that a reed valve for closing a connection port of the oil tank to the connecting pipe due to a pressure drop in the hermetic housing at the time is attached to an inner surface of a body wall of the oil tank.
時低圧となる横置の密閉ハウジングとその外部下方に設
置された油タンクとを吸上管及び上記密閉ハウジング内
の油を上記油タンク内へ戻す連結管を介して接続すると
ともに運転時に駆動される油ポンプにより上記油タンク
内の油を上記吸上管を通して吸い上げて上記圧縮機構の
所要潤滑個所へ給油する横型密閉圧縮機において、上記
圧縮機構及び油ポンプがインバータ駆動の電動モータに
よって低速で起動され、上記油タンクを加熱するヒータ
と、上記油タンク内の圧力上昇によって閉じる逆止弁機
構を備えることを特徴とする横型密閉圧縮機。6. A suction pipe for a horizontal hermetically-sealed housing having a compression mechanism and an electric motor and having a low pressure during operation and an oil tank installed outside the housing, and the oil in the hermetically-sealed housing for the oil tank. In a horizontal hermetic compressor, which is connected through a connecting pipe returning to the inside and sucks oil in the oil tank through the suction pipe by an oil pump driven at the time of operation to supply oil to a required lubrication point of the compression mechanism, A horizontal hermetic compressor characterized in that a compression mechanism and an oil pump are started at a low speed by an electric motor driven by an inverter, and are provided with a heater for heating the oil tank and a check valve mechanism closed by a rise in pressure in the oil tank. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6287121A JP2734498B2 (en) | 1994-04-08 | 1994-10-28 | Horizontal hermetic compressor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6-95747 | 1994-04-08 | ||
| JP9574794 | 1994-04-08 | ||
| JP6287121A JP2734498B2 (en) | 1994-04-08 | 1994-10-28 | Horizontal hermetic compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07324695A true JPH07324695A (en) | 1995-12-12 |
| JP2734498B2 JP2734498B2 (en) | 1998-03-30 |
Family
ID=26436935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6287121A Expired - Lifetime JP2734498B2 (en) | 1994-04-08 | 1994-10-28 | Horizontal hermetic compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2734498B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7494329B2 (en) * | 2005-11-28 | 2009-02-24 | Lg Electronics Inc. | Oil pump for a compressor |
| JP2009129661A (en) * | 2007-11-22 | 2009-06-11 | Aisin Seiki Co Ltd | Fluid flow passage forming device |
| JP2017201215A (en) * | 2016-05-02 | 2017-11-09 | 荏原冷熱システム株式会社 | Turbo refrigerator |
-
1994
- 1994-10-28 JP JP6287121A patent/JP2734498B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7494329B2 (en) * | 2005-11-28 | 2009-02-24 | Lg Electronics Inc. | Oil pump for a compressor |
| JP2009129661A (en) * | 2007-11-22 | 2009-06-11 | Aisin Seiki Co Ltd | Fluid flow passage forming device |
| JP2017201215A (en) * | 2016-05-02 | 2017-11-09 | 荏原冷熱システム株式会社 | Turbo refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2734498B2 (en) | 1998-03-30 |
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