JPH07293470A - Rotary compressor - Google Patents

Abstract

PURPOSE:To prevent starting in the shortage state of lubricating oil so as to improve reliability of respective sliding parts by directly supplying lubricating oil into a compression chamber through a valve mechanism even if liquid refrigerant is returned into the compression chamber from a refrigerating cycle while the compressor is stopped or just after being started. CONSTITUTION:Before a compressor is started, a clearance is formed between a plate 20b and an oil supply pipe 21 by energizing force of a spring 20. While, when the compressor is started, pressure in an intake pipe 19 and in the oil supply pipe 21 is lowered than the internal pressure of a closed casing. Since the oil supply pipe 22 has pressure equal to pressure in the closed casing, internal pressure of a valve mechanism 20 becomes higher than pressure in the oil supply passage 22 and overcomes energizing force of a spring 20c, so as to press and separate a place 20b from an opening part 22 of the oil supply passage 22. At this time, since differential pressure is not so large to press the plate to a pipe 21, lubricating oil in an oil supply closed casing is communicated with an oil supply pipe 19, and lubricating oil is supplied to the compression chamber.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は冷凍サイクル等に使用す
る回転式圧縮機に関し、特に信頼性の向上に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor used in a refrigeration cycle or the like, and more particularly to improving reliability.

【０００２】[0002]

【従来の技術】従来の回転式圧縮機としては、特開昭６
３−１３４８８８号公報に示されているものがある。以
下、図面を参照しながら上記従来の回転式圧縮機の一例
を説明する。2. Description of the Related Art As a conventional rotary compressor, Japanese Patent Laid-Open No.
There is one disclosed in Japanese Patent Publication No. 3-134888. Hereinafter, an example of the conventional rotary compressor will be described with reference to the drawings.

【０００３】従来の構成を図４、図５に示す。図４、図
５において、１は密閉ケーシング、２は電動機部であ
り、シャフト３を介してシリンダ４，ローラ５，ベーン
６，主軸受７，副軸受８により構成される機械部本体９
と連結している。シャフト３は主軸３ａ，副軸３ｂ，ク
ランク３ｃよりなる。１０はベーン背面に設けられたス
プリングである。A conventional configuration is shown in FIGS. In FIG. 4 and FIG. 5, 1 is a closed casing, 2 is an electric motor part, and a machine part main body 9 composed of a cylinder 4, a roller 5, a vane 6, a main bearing 7, and a sub bearing 8 via a shaft 3.
Connected with. The shaft 3 includes a main shaft 3a, a sub shaft 3b, and a crank 3c. Reference numeral 10 is a spring provided on the back surface of the vane.

【０００４】１１はシリンダ４内で、ローラ５，ベーン
６，主軸受７，副軸受８により構成される圧縮室であ
る。１２はシャフト３と連結する給油機構である。１３
はシリンダ４に固定された吸入管であり、シリンダ４の
吸入通路１４を介して圧縮室１１と連通している。Reference numeral 11 denotes a compression chamber in the cylinder 4, which is constituted by the roller 5, the vane 6, the main bearing 7, and the auxiliary bearing 8. Reference numeral 12 is an oil supply mechanism connected to the shaft 3. Thirteen
Is a suction pipe fixed to the cylinder 4, and communicates with the compression chamber 11 via a suction passage 14 of the cylinder 4.

【０００５】１５は吐出孔であり吐出弁１６を介して密
閉ケーシング１内と連通している。１７は吐出管であり
密閉ケーシング１内に開放している。１８は潤滑油であ
る。また、電動機部２は回転子２ａと固定子２ｂにより
構成され回転子２ａにはバランスウェイト２ｃ，２ｄが
固定されている。A discharge hole 15 communicates with the inside of the closed casing 1 through a discharge valve 16. A discharge pipe 17 is open to the inside of the closed casing 1. Reference numeral 18 is a lubricating oil. The electric motor unit 2 is composed of a rotor 2a and a stator 2b, and balance weights 2c and 2d are fixed to the rotor 2a.

【０００６】冷却システム（図示せず）からの冷媒ガス
は、吸入管１３，吸入通路１４より導かれシリンダ４内
の圧縮室１１に至る。圧縮室１１に至った冷媒ガスは、
シャフト３のクランク３ｃに嵌合されたローラ５とベー
ン６により仕切られた圧縮室１１で、電動機部２の回転
に伴うシャフト３及びローラ５の回転運動により漸次圧
縮される。従って圧縮途中において、高圧室１１ａと低
圧室１１ｂとが存在することになる。Refrigerant gas from a cooling system (not shown) is introduced from a suction pipe 13 and a suction passage 14 to reach a compression chamber 11 in the cylinder 4. The refrigerant gas reaching the compression chamber 11 is
In the compression chamber 11 partitioned by the roller 5 and the vane 6 fitted to the crank 3c of the shaft 3, the shaft 3 and the roller 5 are gradually compressed due to the rotational motion of the electric motor unit 2. Therefore, the high pressure chamber 11a and the low pressure chamber 11b exist during the compression.

【０００７】圧縮された冷媒ガスは、副軸受８に備えて
いる吐出孔１５，吐出弁１６を介して密閉ケーシング１
内に一旦吐出された後、吐出管１７を介し冷却システム
に吐出される。The compressed refrigerant gas passes through the discharge hole 15 and the discharge valve 16 provided in the auxiliary bearing 8 and the hermetic casing 1
After being once discharged into the inside, it is discharged to the cooling system through the discharge pipe 17.

【０００８】又、潤滑油１８は、給油機構１２によりシ
ャフト３とローラ５，主軸受７，副軸受８等の摺動部に
供給される。シャフト３とローラ５間の摺動部は高圧で
あるため、シャフト３とローラ５間の摺動部に供給され
た潤滑油１８は、ローラ５と主軸受７，副軸受８間の隙
間を介して、より低圧であるシリンダ４内の圧縮室１１
に差圧により供給される。Lubricating oil 18 is supplied to the sliding portions of shaft 3, roller 5, main bearing 7, auxiliary bearing 8 and the like by oil supply mechanism 12. Since the sliding portion between the shaft 3 and the roller 5 has a high pressure, the lubricating oil 18 supplied to the sliding portion between the shaft 3 and the roller 5 passes through the gap between the roller 5 and the main bearing 7 and the sub bearing 8. The compression chamber 11 in the cylinder 4 that has a lower pressure
Is supplied by differential pressure.

【０００９】さらに、ベーン６はシリンダ４の溝内を往
復運動する際に、密閉ケーシング１内に溜められた潤滑
油１８中に浸り、ベーン６とシリンダ４間の隙間を介し
て、高圧である密閉ケーシング１内からより低圧である
シリンダ４内の圧縮室１１に差圧により供給される。Further, when the vane 6 reciprocates in the groove of the cylinder 4, the vane 6 is immersed in the lubricating oil 18 accumulated in the closed casing 1 and has a high pressure through the gap between the vane 6 and the cylinder 4. The pressure is supplied from the inside of the closed casing 1 to the compression chamber 11 in the cylinder 4, which has a lower pressure, by a differential pressure.

【００１０】[0010]

【発明が解決しようとする課題】しかしながら上記従来
のような構成では、圧縮機が停止中、特に冷蔵庫におけ
る除霜時や、圧縮機の起動直後において、冷凍サイクル
から圧縮機の圧縮室１１にガス状態の冷媒でなく凝縮し
た液冷媒が戻り、圧縮室１１を構成するシリンダ４，ロ
ーラ５，ベーン６，主軸受７，副軸受８等の各摺動部に
付着している潤滑油を取り除いてしまう。However, in the above-described conventional configuration, gas is transferred from the refrigeration cycle to the compression chamber 11 of the compressor while the compressor is stopped, particularly when the refrigerator is defrosted or immediately after the compressor is started. The condensed liquid refrigerant returns instead of the refrigerant in the state, and the lubricating oil adhering to each sliding portion such as the cylinder 4, the roller 5, the vane 6, the main bearing 7, the auxiliary bearing 8 and the like which configures the compression chamber 11 is removed. I will end up.

【００１１】従って、圧縮機が運転し、密閉ケーシング
１内の圧力が上昇し、差圧により各摺動部に隙間を介し
て潤滑油１８が供給されるまでの間、摺動部が潤滑油が
ほとんど無い状態で運転される。そのため、摺動部、特
に潤滑油１８が供給されていても摺動状態が金属接触に
近いベーン６の先端とローラ５との摺動部が摩耗すると
いった信頼性上の問題があった。Therefore, until the compressor operates, the pressure in the closed casing 1 rises, and the lubricating oil 18 is supplied to the respective sliding parts through the gaps due to the differential pressure, the sliding parts are lubricated with the lubricating oil. There is almost no Therefore, there is a reliability problem that the sliding portion, especially the sliding portion between the tip of the vane 6 and the roller 5 whose sliding state is close to metal contact is worn even if the lubricating oil 18 is supplied.

【００１２】また、圧縮室１１を構成する各摺動部が摩
耗することにより、摺動部の加工精度及び潤滑油にてシ
ールされている各シール部のシール性が低下し、圧縮機
の効率が低下するといった問題があった。Further, as the sliding parts constituting the compression chamber 11 are worn, the processing accuracy of the sliding parts and the sealing performance of each sealing part sealed by the lubricating oil are deteriorated, and the efficiency of the compressor is reduced. There was a problem that it decreased.

【００１３】本発明は従来の課題を解決するものであ
り、簡単な構成で圧縮機停止中や、圧縮機起動直後に冷
凍サイクルから圧縮室に液冷媒が戻ってきても、圧縮機
の停止中に圧縮室内に直接潤滑油を供給し、かつ圧縮機
起動直後から一定時間圧縮室内に直接潤滑油を供給する
ことによって、圧縮室を構成する各摺動部が潤滑油不足
の状態で圧縮機が起動することを防止し、圧縮室を構成
する各摺動部等の信頼性を向上させるとともに、各シー
ル部のシール性の低下による圧縮機の効率の低下を防止
することを目的とするものである。The present invention solves the problems of the prior art. While the compressor is stopped with a simple structure, or even when the liquid refrigerant returns from the refrigeration cycle to the compression chamber immediately after the compressor is started, the compressor is stopped. By directly supplying the lubricating oil into the compression chamber for a certain period of time immediately after the compressor is started, the compressor can be operated in a state where each sliding part that constitutes the compression chamber is insufficient in lubricating oil. The purpose is to prevent the start-up, improve the reliability of each sliding part that constitutes the compression chamber, and prevent the efficiency of the compressor from being deteriorated due to the deterioration of the sealing property of each sealing part. is there.

【００１４】また、圧縮機の運転状態や、冷媒及び潤滑
油の種類によっては、冷媒ガスが密閉ケーシング１内で
凝縮して液冷媒となり、密閉ケーシング１下部に滞留す
る。特に非相溶性の潤滑油を使用した際には、潤滑油に
比重は液冷媒の比重よりも小さい。Further, depending on the operating condition of the compressor and the types of the refrigerant and the lubricating oil, the refrigerant gas is condensed in the closed casing 1 to become a liquid refrigerant and stays below the closed casing 1. In particular, when an incompatible lubricating oil is used, the specific gravity of the lubricating oil is smaller than that of the liquid refrigerant.

【００１５】本発明は、圧縮室内に直接潤滑油を供給す
る際に液冷媒の混入を防止し、圧縮室を構成する各摺動
部等の信頼性を向上させるとともに、各シール部のシー
ル性の低下による圧縮機の効率の低下を防止する。The present invention prevents the mixture of the liquid refrigerant when directly supplying the lubricating oil into the compression chamber, improves the reliability of the sliding parts and the like which form the compression chamber, and seals the sealing parts. To prevent the efficiency of the compressor from decreasing due to

【００１６】[0016]

【課題を解決するための手段】この目的を達成するため
本発明の回転式圧縮機は、一端が密閉ケーシング外に連
通し、他端がシリンダに設けられた吸入通路に連通した
吸入パイプと、密閉ケーシング内に収納され吸入パイ
プ、低圧室、吸入通路のいずれかより重力方向上方に配
設されたバルブ機構と、一端がバルブ機構より重力方向
下方に配設され記吸入パイプ、低圧室、吸入通路のいず
れかに連通し、他端がバルブ機構の下部に連通した給油
管と、一端がバルブ機構の上部に連通し、他端が密閉ケ
ーシング内に溜められた潤滑油中に開口した給油路とか
ら構成されている。To achieve this object, a rotary compressor according to the present invention has a suction pipe having one end communicating with the outside of a hermetic casing and the other end communicating with a suction passage provided in a cylinder. A valve mechanism that is housed in a closed casing and is disposed above the suction pipe, the low pressure chamber, or the suction passage in the direction of gravity, and one end is disposed below the valve mechanism in the direction of gravity. An oil supply pipe that communicates with one of the passages and the other end communicates with the lower part of the valve mechanism, and an oil supply passage that has one end communicating with the upper part of the valve mechanism and the other end that opens into the lubricating oil stored in the closed casing. It consists of and.

【００１７】また、吸入パイプ、低圧室、吸入通路のい
ずれかの重力方向下方に配設されたタンクと、一端がバ
ルブ機構の下部に連通し他端がタンクに連通した排液管
と、一端がタンクの上部に連通し他端が吸入パイプ、低
圧室、吸入通路のいずれかに連通したガス路と、バルブ
機構に連通した排液管の開口端に配設され潤滑油より比
重が大きく且つ液冷媒より比重が小さい材料にて形成さ
れたフロート機構とから構成されている。Further, a tank disposed below the suction pipe, the low pressure chamber, or the suction passage in the direction of gravity, a drain pipe having one end communicating with the lower portion of the valve mechanism and the other end communicating with the tank, and one end Is connected to the upper part of the tank and the other end is connected to the suction pipe, the low pressure chamber, or the suction passage, and is disposed at the open end of the drain pipe that communicates with the valve mechanism. The float mechanism is made of a material having a smaller specific gravity than the liquid refrigerant.

【００１８】[0018]

【作用】本発明の回転式圧縮機は、圧縮機の停止中や圧
縮機起動直後に冷凍サイクルから圧縮室に液冷媒が戻っ
てきても、バルブ機構を介して圧縮機の停止中に圧縮室
内に直接潤滑油を供給し、かつ圧縮機起動直後から一定
時間圧縮室内に直接潤滑油を供給することができる。そ
のため、圧縮室を構成する各摺動部が潤滑油不足の状態
で圧縮機が起動することを防止でき、圧縮室を構成する
各摺動部等の信頼性が向上するとともに、各シール部の
シール性の低下による圧縮機の効率の低下を防止するこ
とができる。In the rotary compressor of the present invention, even if the liquid refrigerant returns from the refrigeration cycle to the compression chamber during the stop of the compressor or immediately after the compressor is started, the compression chamber is stopped during the stop of the compressor via the valve mechanism. It is possible to directly supply the lubricating oil to the compressor and to directly supply the lubricating oil into the compression chamber for a certain period of time immediately after the compressor is started. Therefore, it is possible to prevent the compressor from starting in a state where each sliding portion that constitutes the compression chamber is insufficient in lubricating oil, improve the reliability of each sliding portion that constitutes the compression chamber, and improve the reliability of each sealing portion. It is possible to prevent a decrease in the efficiency of the compressor due to a decrease in the sealing property.

【００１９】また、圧縮室を構成する各摺動部の摩耗を
防止することにより、摺動部の加工精度及び潤滑油にて
シールされている各シール部のシール性の低下を防止で
き、圧縮機の効率の低下を防止することができる。Further, by preventing the sliding parts constituting the compression chamber from being worn, it is possible to prevent the working accuracy of the sliding parts and the deterioration of the sealing property of each sealing part sealed by the lubricating oil from being deteriorated. It is possible to prevent the efficiency of the machine from decreasing.

【００２０】また、密閉ケーシング内で冷媒が凝縮し、
密閉ケーシング下部に液冷媒として滞留しても、その液
冷媒をバルブ機構を介して直接圧縮室に供給することを
防止し、潤滑油のみを供給することができ、圧縮室を構
成する各摺動部等の信頼性が向上するとともに、各シー
ル部のシール性の低下による圧縮機の効率の低下を防止
することができる。Further, the refrigerant is condensed in the closed casing,
Even if it stays as a liquid refrigerant in the lower part of the closed casing, it is possible to prevent the liquid refrigerant from being directly supplied to the compression chamber through the valve mechanism, and only the lubricating oil can be supplied. It is possible to improve the reliability of the parts and the like, and prevent the efficiency of the compressor from being deteriorated due to the deterioration of the sealing property of each seal part.

【００２１】[0021]

【実施例】以下、本発明による回転式圧縮機の第１の実
施例について、図面を参照しながら説明する。尚、従来
と同一構成については、同一符号を付して詳細な説明を
省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the rotary compressor according to the present invention will be described below with reference to the drawings. It should be noted that the same components as those of the related art are denoted by the same reference numerals and detailed description thereof will be omitted.

【００２２】図１は本発明の第１の実施例による回転式
圧縮機の要部断面図である。図２は同実施例の回転式圧
縮機の縦断面図である。FIG. 1 is a sectional view of a main part of a rotary compressor according to a first embodiment of the present invention. FIG. 2 is a vertical sectional view of the rotary compressor of the same embodiment.

【００２３】図１、図２において、１４はシリンダ４に
設けられた吸入通路、１９は一端が密閉ケーシング１外
に連通し、他端が吸入通路１４に連通した吸入パイプで
あり、２０は密閉ケーシング１内に収納され吸入パイプ
１９の重力方向上方に配設されたバルブ機構である。In FIGS. 1 and 2, 14 is a suction passage provided in the cylinder 4, 19 is a suction pipe having one end communicating with the outside of the closed casing 1 and the other end communicating with the suction passage 14, and 20 is a hermetic seal. The valve mechanism is housed in the casing 1 and arranged above the suction pipe 19 in the direction of gravity.

【００２４】２１は一端が吸入パイプ１９の重力方向上
方に連通し、他端がバルブ機構２０の下部に連通した給
油管であり、２２は一端がバルブ機構２０に連通し、他
端が密閉ケーシング１内に溜められた潤滑油１８中に開
口した給油路である。Reference numeral 21 is an oil supply pipe having one end communicating with the suction pipe 19 above the gravity direction and the other end communicating with the lower portion of the valve mechanism 20, and 22 is one end communicating with the valve mechanism 20 and the other end being a closed casing. 1 is an oil supply passage that opens into the lubricating oil 18 stored in 1.

【００２５】バルブ機構２０は、ホルダー２０ａ，プレ
ート２０ｂ，バネ２０ｃとから構成されている。バネ２
０ｃはプレート２０ｂをホルダー２０ａ上部の給油路２
２の開口部２２ａに不勢するように配設されている。The valve mechanism 20 comprises a holder 20a, a plate 20b and a spring 20c. Spring 2
0c refers to the plate 20b and the oil supply passage 2 above the holder 20a.
The second opening 22a is arranged so as not to be biased.

【００２６】以上のように構成された回転式圧縮機にお
いて、以下その動作を説明する。まず、圧縮機の起動直
後において、蒸発器に滞留していた液冷媒が圧縮機に吸
い込まれることがある。圧縮機に液冷媒が吸い込まれる
際には、まず、吸入パイプ１９内を液冷媒が流れ、シリ
ンダ４に設けられた吸入通路１４を介して圧縮室１１に
導かれ、シリンダ４，ローラ５，ベーン６，主軸受７，
副軸受８等の各摺動部に付着している潤滑油１８を取り
除いてしまう。The operation of the rotary compressor having the above structure will be described below. First, immediately after the start of the compressor, the liquid refrigerant that has accumulated in the evaporator may be sucked into the compressor. When the liquid refrigerant is sucked into the compressor, first, the liquid refrigerant flows in the suction pipe 19 and is guided to the compression chamber 11 through the suction passage 14 provided in the cylinder 4, and then the cylinder 4, the roller 5, the vane. 6, main bearing 7,
The lubricating oil 18 adhering to each sliding portion such as the sub bearing 8 is removed.

【００２７】しかしながら、まず圧縮機起動前は、プレ
ート２０ｂはバネ２０ｃによりホルダー２０ａ上部の給
油路２２の開口部２２ａに不勢されているため、プレー
ト２０ｂと給油管２１とは接触シールせず、隙間が保た
れている。その後圧縮機が起動した際には、吸入パイプ
１９内及び給油管２１内の圧力は低下し、密閉ケーシン
グ１内の圧力より低くなる。However, first, since the plate 20b is biased by the spring 20c to the opening 22a of the oil supply passage 22 above the holder 20a before the compressor is activated, the plate 20b and the oil supply pipe 21 do not contact and seal, A gap is maintained. After that, when the compressor is started, the pressure in the suction pipe 19 and the pressure in the oil supply pipe 21 decrease and become lower than the pressure in the closed casing 1.

【００２８】給油路２２内は密閉ケーシング１内と同じ
圧力であるため、給油路２２内の圧力がバルブ機構２０
内の圧力よりも高くなり圧力差が生じる。圧縮機の起動
初期においてはこの圧力差は小さいが、プレート２０ｂ
を給油路２２の開口部２２ａに不勢するバネ２０ｃの不
勢力より僅かに大きくなる。そのため、プレート２０ｂ
は給油路２２の開口部２２ａから離れるが、圧力差がバ
ネ２０ｃの不勢力に対して十分大きくないため、プレー
ト２０ｂは給油管２１に押しつけられない。Since the pressure in the oil supply passage 22 is the same as that in the closed casing 1, the pressure in the oil supply passage 22 is equal to that in the valve mechanism 20.
It becomes higher than the internal pressure and a pressure difference occurs. Although the pressure difference is small in the initial stage of starting the compressor, the plate 20b
Is slightly larger than the biasing force of the spring 20c biasing the opening 22a of the oil supply passage 22. Therefore, the plate 20b
Is separated from the opening 22a of the oil supply passage 22, but the plate 20b cannot be pressed against the oil supply pipe 21 because the pressure difference is not sufficiently large with respect to the biasing force of the spring 20c.

【００２９】したがって、密閉ケーシング１内の潤滑油
１８と給油パイプ１９内は、給油路２２、バルブ機構２
０、給油管２１を介して連通し、潤滑油１８は高圧、吸
入パイプ１９内は低圧、バルブ機構２０内はその中間の
圧力となる。そのため、この圧力差により潤滑油１８が
バルブ機構２０を介して吸入パイプ１９内に導かれ、圧
縮室１１に供給される。Therefore, the lubricating oil 18 inside the closed casing 1 and the inside of the oil supply pipe 19 are provided with the oil supply passage 22 and the valve mechanism 2.
0, the oil is communicated through the oil supply pipe 21, the lubricating oil 18 has a high pressure, the suction pipe 19 has a low pressure, and the valve mechanism 20 has an intermediate pressure. Therefore, due to this pressure difference, the lubricating oil 18 is guided into the suction pipe 19 via the valve mechanism 20 and is supplied to the compression chamber 11.

【００３０】さらに圧縮機の運転が継続して、密閉ケー
シング１内の圧力が更に上昇し、吸入パイプ１９内との
圧力差が大きくなり、バネ２０ｃの不勢力より圧力差が
十分大きくなると、プレート２０ｂが給油管２１に接触
するまでバネ２０ｃが縮む。そのため、プレート２０ｂ
と給油管２１とが接触シールし、バルブ機構２０内と給
油管２１とは連通しなくなり、バルブ機構２０、吸入パ
イプ１９を介して行われていた圧縮室１１への直接給油
は行われなくなる。しかし、バルブ機構２０内にはそれ
まで給油路２２を介して流入していた潤滑油１８が溜ま
ったままとなる。When the operation of the compressor is further continued and the pressure inside the closed casing 1 further rises, the pressure difference between the inside of the suction pipe 19 becomes large, and the pressure difference becomes sufficiently larger than the biasing force of the spring 20c, the plate The spring 20c contracts until 20b contacts the oil supply pipe 21. Therefore, the plate 20b
And the oil supply pipe 21 are in contact with each other, the communication between the inside of the valve mechanism 20 and the oil supply pipe 21 is lost, and the direct oil supply to the compression chamber 11 which is performed via the valve mechanism 20 and the suction pipe 19 is not performed. However, the lubricating oil 18 that has flowed in through the oil supply passage 22 until then remains in the valve mechanism 20.

【００３１】そして、バルブ機構２０、吸入パイプ１９
を介して行われていた圧縮室１１への直接給油は行われ
なくなった後は、従来のローラ５と主軸受７，副軸受８
間の隙間及びベーン６とシリンダ４の溝間の隙間を介し
て圧縮室１１内への給油となる。Then, the valve mechanism 20 and the suction pipe 19
After the direct oil supply to the compression chamber 11 which has been performed via the oil is no longer performed, the conventional roller 5, the main bearing 7, and the auxiliary bearing 8 are used.
Oil is supplied into the compression chamber 11 through the gap between them and the gap between the vane 6 and the groove of the cylinder 4.

【００３２】従って、圧縮機の起動直後に冷凍サイクル
から液冷媒が戻ってきても、起動と同時に圧縮室１１に
直接給油を行うことにより、圧縮室１１を構成するシリ
ンダ４，ローラ５，ベーン６，主軸受７，副軸受８等の
各摺動部において、液冷媒により付着している潤滑油１
８が取り除かれて摺動することを防止できる。Therefore, even if the liquid refrigerant returns from the refrigeration cycle immediately after the compressor is started, the cylinder 4, the roller 5, and the vane 6 forming the compression chamber 11 are directly supplied with oil at the same time as the startup. Lubricating oil 1 adhered by the liquid refrigerant on the sliding parts of the main bearing 7, the sub bearing 8, etc.
It is possible to prevent 8 from being removed and sliding.

【００３３】また、圧縮室１１内に過多の潤滑油１８が
供給されオイル圧縮を引き起こすこともなく、圧縮機か
ら冷凍サイクルへ流出する潤滑油量が増大することもな
い。Further, the excessive amount of the lubricating oil 18 is not supplied to the compression chamber 11 to cause oil compression, and the amount of the lubricating oil flowing out from the compressor to the refrigeration cycle does not increase.

【００３４】尚、給油路２２，バルブ機構２０を介して
圧縮室１１内へ直接給油を行う時間は、バネ２０ｃの不
勢力を変えることによって調整できることは言うまでも
ない。Needless to say, the time for directly supplying oil into the compression chamber 11 via the oil supply passage 22 and the valve mechanism 20 can be adjusted by changing the biasing force of the spring 20c.

【００３５】更に時間が経過して圧縮機が停止すると、
圧縮機内部は時間経過と共に均圧する。即ち、給油路２
２内の圧力が徐々に低下し、吸入パイプ１９内の圧力が
徐々に上昇し、その圧力差が次第に小さくなる。従っ
て、圧力差がバネ２０ｃの不勢力より小さくなり、プレ
ート２０ｂが給油管２１から離れ、バルブ機構２０内と
吸入パイプ１９とが給油管２１を介して連通する。When the compressor stops after a further time elapses,
The pressure inside the compressor is equalized over time. That is, the oil supply passage 2
The pressure in 2 gradually decreases, the pressure in the suction pipe 19 gradually increases, and the pressure difference gradually decreases. Therefore, the pressure difference becomes smaller than the biasing force of the spring 20c, the plate 20b separates from the oil supply pipe 21, and the valve mechanism 20 and the suction pipe 19 communicate with each other via the oil supply pipe 21.

【００３６】そして、圧縮機の運転中にバルブ機構２０
内に溜まっていた潤滑油１８がその自重により給油管２
１、吸入パイプ１９内を介して圧縮室１１内に流入し、
圧縮室１１を構成するシリンダ４，ローラ５，ベーン
６，主軸受７，副軸受８等の各摺動部に供給される。
尚、本実施例において、吸入パイプ１９が圧縮室１１に
対して重力方向上方となるよう傾斜している方がより効
果的であることは言うまでもない。The valve mechanism 20 is operated during the operation of the compressor.
The lubricating oil 18 accumulated inside the oil supply pipe 2 due to its own weight.
1, flow into the compression chamber 11 through the suction pipe 19,
It is supplied to each sliding portion such as the cylinder 4, the roller 5, the vane 6, the main bearing 7, the auxiliary bearing 8 and the like which form the compression chamber 11.
Needless to say, in the present embodiment, it is more effective if the suction pipe 19 is inclined with respect to the compression chamber 11 so as to be upward in the gravity direction.

【００３７】従って、圧縮機の停止中に、冷凍サイクル
から圧縮機の圧縮室１１に液冷媒が戻ってきても、バル
ブ機構２０内に溜まっていた潤滑油１８を直接圧縮室１
１に供給することができ、圧縮室１１を構成するシリン
ダ４，ローラ５，ベーン６，主軸受７，副軸受８等の各
摺動部において、潤滑油が液冷媒によって取り除かれる
ことを防止できる。そのため、圧縮機の起動直前から圧
縮室１１内には十分な潤滑油が供給されており、圧縮室
１１を構成する各摺動部が潤滑油不足状態で起動するこ
とを防止できる。Therefore, even if the liquid refrigerant returns from the refrigeration cycle to the compression chamber 11 of the compressor while the compressor is stopped, the lubricating oil 18 accumulated in the valve mechanism 20 is directly transferred to the compression chamber 1
It is possible to prevent the lubricating oil from being removed by the liquid refrigerant in each of the sliding parts such as the cylinder 4, the roller 5, the vane 6, the main bearing 7, the auxiliary bearing 8 that constitute the compression chamber 11. . Therefore, a sufficient amount of lubricating oil is supplied into the compression chamber 11 immediately before the compressor is started, and it is possible to prevent each sliding portion that constitutes the compression chamber 11 from starting in a lubricating oil shortage state.

【００３８】以上のように本実施例の回転式圧縮機は、
一端が密閉ケーシング外に連通し、他端がシリンダに設
けられた吸入通路に連通した吸入パイプと、密閉ケーシ
ング内に収納され吸入パイプより重力方向上方に配設さ
れたバルブ機構と、一端がバルブ機構より重力方向下方
に配設された吸入パイプに連通し、他端がバルブ機構の
下部に連通した給油管と、一端がバルブ機構の上部に連
通し、他端が密閉ケーシング内に溜められた潤滑油中に
開口した給油路を備えたものであるから、圧縮機の起動
直後や圧縮機の停止中に冷凍サイクルから圧縮室に液冷
媒が戻ってきても、圧縮機の起動直後から一定時間及び
圧縮機の停止中に、圧縮室内に直接潤滑油を供給でき
る。As described above, the rotary compressor of this embodiment is
A suction pipe having one end communicating with the outside of the closed casing and the other end communicating with a suction passage provided in the cylinder, a valve mechanism housed in the closed casing and disposed above the suction pipe in the direction of gravity, and a valve at one end. An oil supply pipe that communicates with a suction pipe disposed below the mechanism in the direction of gravity and the other end communicates with the lower part of the valve mechanism, and one end communicates with the upper part of the valve mechanism, and the other end is stored in a closed casing. Since it has an oil supply path that opens into the lubricating oil, even if the liquid refrigerant returns from the refrigeration cycle to the compression chamber immediately after the compressor is started or while the compressor is stopped, it will continue for a certain period of time immediately after the compressor starts. Also, the lubricating oil can be directly supplied into the compression chamber while the compressor is stopped.

【００３９】そのため、圧縮室を構成する各摺動部にお
いて、圧縮機の起動と同時に常に潤滑油を確保すること
ができ、且つ圧縮機の起動前から圧縮室内に十分な潤滑
油を供給することができるため、圧縮室を構成する各摺
動部の摩耗等を防止でき、信頼性が向上する。Therefore, in each of the sliding parts constituting the compression chamber, the lubricating oil can be always secured at the same time as the compressor is started, and sufficient lubricating oil can be supplied into the compression chamber before the compressor is started. As a result, it is possible to prevent abrasion of each sliding portion that constitutes the compression chamber and improve reliability.

【００４０】また、圧縮室を構成する各摺動部の摩耗を
防止することにより、摺動部の加工精度及び潤滑油にて
シールされている各シール部のシール性の低下を防止で
き、圧縮機の効率の低下を防止することができる。Further, by preventing the wear of the sliding parts constituting the compression chamber, it is possible to prevent the processing accuracy of the sliding parts and the deterioration of the sealing property of each sealing part sealed by the lubricating oil from being deteriorated. It is possible to prevent the efficiency of the machine from decreasing.

【００４１】また、圧縮機の運転が続くと、圧縮室内へ
の給油は、従来のローラと主軸受，副軸受間の隙間及び
ベーンとシリンダの溝間の隙間を介しての供給となる。
そのため、圧縮室内に過多の潤滑油が供給されオイル圧
縮を引き起こすこともなく、また圧縮機から冷凍サイク
ルへ流出する潤滑油量が増大することもない。When the compressor continues to be operated, oil is supplied into the compression chamber through the gap between the conventional roller and the main bearing and the sub bearing, and the gap between the vane and the groove of the cylinder.
Therefore, the excessive amount of lubricating oil is not supplied to the compression chamber to cause oil compression, and the amount of lubricating oil flowing from the compressor to the refrigeration cycle does not increase.

【００４２】尚、本実施例では、給油管が吸入パイプに
連通しているが、給油管がシリンダ内の低圧室や吸入通
路等の、圧縮機の起動により圧力が低下する箇所に連通
していれば同様の効果が得られることは言うまでもな
い。また、圧縮機の停止中にプレートが給油路の開口部
に接触していなくても、プレートが給油管と接触シール
していなければ良いことは言うまでもない。In this embodiment, the oil supply pipe is communicated with the suction pipe, but the oil supply pipe is communicated with the low pressure chamber in the cylinder, the suction passage, and the like where the pressure is reduced by the start of the compressor. Needless to say, the same effect can be obtained. Needless to say, even if the plate is not in contact with the opening of the oil supply passage while the compressor is stopped, it is sufficient if the plate is not in contact with and sealed by the oil supply pipe.

【００４３】次に、本発明の回転式圧縮機の第２の実施
例について、図面を参照しながら説明する。尚、第１の
実施例と同一構成については、同一符号を付して詳細な
説明は省略する。Next, a second embodiment of the rotary compressor of the present invention will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

【００４４】図３は本発明の第２の実施例による回転式
圧縮機の要部断面図である。図３において、２３は吸入
パイプ１９の重力方向下方に配設されたタンクである。
２４は一端がバルブ機構２０の下部に連通し他端がタン
ク２３に連通した排液管である。FIG. 3 is a sectional view of the essential parts of a rotary compressor according to the second embodiment of the present invention. In FIG. 3, reference numeral 23 is a tank disposed below the suction pipe 19 in the direction of gravity.
Reference numeral 24 is a drain pipe having one end communicating with the lower portion of the valve mechanism 20 and the other end communicating with the tank 23.

【００４５】２５は一端がタンク２３の上部に連通し他
端が吸入パイプ１９に連通したガス路であり、２６はバ
ルブ機構２０に連通した排液管２４の開口端２４ａに配
設され潤滑油より比重が大きく且つ液冷媒より比重が小
さい材料にて形成されたたフロート機構である。Reference numeral 25 is a gas passage, one end of which communicates with the upper portion of the tank 23 and the other end of which communicates with the suction pipe 19. Reference numeral 26 denotes a gas passage which is disposed at an opening end 24a of a drainage pipe 24 which communicates with the valve mechanism 20. The float mechanism is made of a material having a higher specific gravity and a lower specific gravity than the liquid refrigerant.

【００４６】以上のように構成された回転式圧縮機にお
いて、以下その動作を説明する。圧縮機の運転状態、ま
た冷媒や潤滑油の種類によっては、圧縮機の停止中や運
転中において、冷媒ガスが密閉ケーシング１内で凝縮し
て液冷媒となり、密閉ケーシング１内下部に滞留する。
特に非相溶性の潤滑油を使用した際には、潤滑油の比重
は液冷媒の比重よりも小さい。The operation of the rotary compressor having the above structure will be described below. Depending on the operating state of the compressor and the types of refrigerant and lubricating oil, the refrigerant gas condenses in the closed casing 1 into a liquid refrigerant and stays in the lower part of the closed casing 1 during the stop or operation of the compressor.
In particular, when an incompatible lubricating oil is used, the specific gravity of the lubricating oil is smaller than that of the liquid refrigerant.

【００４７】まず圧縮機起動前は、プレート２０ｂはバ
ネ２０ｃによりホルダー２０ａ上部の給油路２２の開口
部２２ａに不勢されているため、プレート２０ｂと給油
管２１とは接触シールせず、隙間が保たれている。ま
た、バルブ機構２０、タンク２３、吸入パイプ１９内は
同じ圧力となっている。圧力差がいずれにおいてもない
ため、バルブ機構２０内に冷媒ガス、潤滑油１８が有る
時は、フロート機構２６の方が比重が大きいためフロー
ト機構２６は自重落下し、排液管２４の開口端２４ａを
接触シールする。Before the compressor is activated, the plate 20b is biased by the spring 20c to the opening 22a of the oil supply passage 22 above the holder 20a. Therefore, the plate 20b and the oil supply pipe 21 are not contact-sealed with each other, and a gap is left between them. It is kept. Further, the valve mechanism 20, the tank 23, and the suction pipe 19 have the same pressure. Since there is no difference in pressure, when the refrigerant gas and the lubricating oil 18 are present in the valve mechanism 20, the float mechanism 26 has a larger specific gravity, so the float mechanism 26 falls by its own weight and the open end of the drainage pipe 24. 24a is contact-sealed.

【００４８】また、バルブ機構２０内が液冷媒が溜まる
と、フロート機構２６の方が液冷媒より比重が小さいた
めフロート機構２６は浮上し、バルブ機構２０内とタン
ク２３は排液管２４を介して連通し、液冷媒は排液管２
４を介してタンク２３内に流出する。そして、液冷媒が
全て流出するとの開口端２４ａを接触シールする。その
ため、圧縮機が起動する際は、フロート機構２６は閉鎖
されている。When the liquid refrigerant accumulates in the valve mechanism 20, the float mechanism 26 floats because the specific gravity of the float mechanism 26 is smaller than that of the liquid refrigerant, and the inside of the valve mechanism 20 and the tank 23 pass through the drain pipe 24. And the liquid refrigerant is drained 2
4 and flows into the tank 23. Then, the opening end 24a at which all the liquid refrigerant flows out is contact-sealed. Therefore, the float mechanism 26 is closed when the compressor is started.

【００４９】タンク２３は吸入パイプ１９より重力方向
下方にあるため、フロート機構２６を介してタンク２３
内に流入した液冷媒が、吸入パイプ１９内流入すること
はない。Since the tank 23 is below the suction pipe 19 in the direction of gravity, the tank 23 is connected via the float mechanism 26.
The liquid refrigerant flowing in does not flow into the suction pipe 19.

【００５０】圧縮機が起動した際には、吸入パイプ１９
内、給油管２１内、タンク２３内、排液管２４内、ガス
路２５内の圧力は低下し、密閉ケーシング１内の圧力よ
り低くなる。When the compressor is started, the suction pipe 19
Inside, the inside of the oil supply pipe 21, the inside of the tank 23, the inside of the drainage pipe 24, and the inside of the gas passage 25 decrease and become lower than the pressure inside the closed casing 1.

【００５１】給油路２２内は密閉ケーシング１内と同じ
圧力であるため、給油路２２内の圧力がバルブ機構２０
内の圧力よりも高くなり圧力差が生じ、プレート２０ｂ
は給油路２２の開口部２２ａから離れるが、圧力差がバ
ネ２０ｃの不勢力に対して十分大きくないため、プレー
ト２０ｂは給油管２１に押しつけられない。Since the pressure in the oil supply passage 22 is the same as that in the closed casing 1, the pressure in the oil supply passage 22 is equal to the pressure in the valve mechanism 20.
The pressure inside the plate 20b becomes higher than that in the plate 20b.
Is separated from the opening 22a of the oil supply passage 22, but the plate 20b cannot be pressed against the oil supply pipe 21 because the pressure difference is not sufficiently large with respect to the biasing force of the spring 20c.

【００５２】したがって、密閉ケーシング１内の潤滑油
１８と給油パイプ１９内は、給油路２２、バルブ機構２
０、給油管２１を介して連通し、潤滑油１８は高圧、吸
入パイプ１９内は低圧、バルブ機構２０内はその中間の
圧力となる。この時、排液管２４内は低圧であるため、
フロート機構２６を閉鎖するように圧力差が作用するた
めフロート機構２６は閉鎖されたままである。そのた
め、密閉ケーシング１内の高圧とバルブ機構２０内の圧
力差により潤滑油１８がバルブ機構２０を介して吸入パ
イプ１９内に導かれ、圧縮室１１に供給される。Therefore, the lubricating oil 18 and the oil supply pipe 19 in the closed casing 1 are provided with the oil supply passage 22 and the valve mechanism 2.
0, the oil is communicated through the oil supply pipe 21, the lubricating oil 18 has a high pressure, the suction pipe 19 has a low pressure, and the valve mechanism 20 has an intermediate pressure. At this time, since the pressure inside the drainage pipe 24 is low,
The float mechanism 26 remains closed due to the pressure differential acting to close the float mechanism 26. Therefore, the lubricating oil 18 is guided into the suction pipe 19 via the valve mechanism 20 due to the high pressure in the closed casing 1 and the pressure difference in the valve mechanism 20, and is supplied to the compression chamber 11.

【００５３】また、冷媒ガスが密閉ケーシング１内で凝
縮し、密閉ケーシング１内下部に液冷媒が滞留する際
は、密閉ケーシング１内下部に溜まった潤滑油１８とと
もに、液冷媒が給油路２２を介してバルブ機構２０内に
流入する。しかしながら、フロート機構２６は液冷媒よ
りも比重が小さいため、フロート機構２６は排液管２４
の開口端２４ａから浮上し、液冷媒は排液管２４を介し
てタンク２３内に流出するため、液冷媒が給油管２１、
吸入パイプ１９を介して圧縮室１１内に流入することは
ない。When the refrigerant gas is condensed in the closed casing 1 and the liquid refrigerant stays in the lower portion of the closed casing 1, the liquid refrigerant flows through the oil supply passage 22 together with the lubricating oil 18 accumulated in the lower portion of the closed casing 1. Through the valve mechanism 20. However, since the float mechanism 26 has a smaller specific gravity than the liquid refrigerant, the float mechanism 26 has a specific gravity.
Since the liquid refrigerant floats up from the open end 24a and flows out into the tank 23 through the drainage pipe 24, the liquid refrigerant flows into the oil supply pipe 21,
It does not flow into the compression chamber 11 via the suction pipe 19.

【００５４】また、タンク２３内に流入した液冷媒は、
その自重によりタンク２３下部に滞留するため、タンク
２３の上部から吸入パイプ１９に連通しているガス路２
５に吸入されることはなく、タンク２３内でガス化した
冷媒のみが吸入される。そのため、液冷媒がタンク２
３、ガス路２５、吸入パイプ１９を介して圧縮室１１内
に流入することはない。The liquid refrigerant flowing into the tank 23 is
Since it stays in the lower portion of the tank 23 due to its own weight, the gas passage 2 communicating with the suction pipe 19 from the upper portion of the tank 23.
5 is not sucked, but only the gasified refrigerant in the tank 23 is sucked. Therefore, the liquid refrigerant is
3, it does not flow into the compression chamber 11 through the gas passage 25 and the suction pipe 19.

【００５５】さらに圧縮機の運転が継続すると、密閉ケ
ーシング１内の圧力が更に上昇し、プレート２０ｂと給
油管２１とが接触シールし、バルブ機構２０内と給油管
２１とは連通しなくなり、バルブ機構２０、吸入パイプ
１９を介して行われていた圧縮室１１への直接給油は行
われなくなる。しかし、バルブ機構２０内にはそれまで
給油路２２を介して流入していた潤滑油１８と液冷媒の
内、潤滑油１８のみが溜まったままとなる。When the operation of the compressor is further continued, the pressure in the closed casing 1 further rises, the plate 20b and the oil supply pipe 21 make a contact seal, and the valve mechanism 20 and the oil supply pipe 21 do not communicate with each other, and the valve is closed. The direct oil supply to the compression chamber 11, which has been performed via the mechanism 20 and the suction pipe 19, is no longer performed. However, only the lubricating oil 18 remains in the valve mechanism 20 among the lubricating oil 18 and the liquid refrigerant that have flown through the oil supply passage 22 until then.

【００５６】そして、バルブ機構２０、吸入パイプ１９
を介して行われていた圧縮室１１への直接給油は行われ
なくなった後は、従来のローラ５と主軸受７，副軸受８
間の隙間及びベーン６とシリンダ４の溝間の隙間を介し
て圧縮室１１内への給油となる。Then, the valve mechanism 20 and the suction pipe 19
After the direct oil supply to the compression chamber 11 which has been performed via the oil is no longer performed, the conventional roller 5, the main bearing 7, and the auxiliary bearing 8 are used.
Oil is supplied into the compression chamber 11 through the gap between them and the gap between the vane 6 and the groove of the cylinder 4.

【００５７】従って、圧縮機の起動直後に冷凍サイクル
から吸入パイプ１９を介して液冷媒が戻ってきても、起
動と同時にバルブ機構２０を介して圧縮室１１に直接潤
滑油１８を供給し、且つバルブ機構２０を介して液冷媒
が圧縮室に流入することを防止できる。そのため、圧縮
室１１を構成するシリンダ４，ローラ５，ベーン６，主
軸受７，副軸受８等の各摺動部において、液冷媒により
付着している潤滑油１８が取り除かれて摺動することを
防止できる。Therefore, even if the liquid refrigerant returns from the refrigeration cycle through the suction pipe 19 immediately after the compressor starts up, the lubricating oil 18 is directly supplied to the compression chamber 11 through the valve mechanism 20 at the same time as the start-up, and It is possible to prevent the liquid refrigerant from flowing into the compression chamber via the valve mechanism 20. Therefore, the lubricating oil 18 adhering to the liquid refrigerant is removed from the sliding parts such as the cylinder 4, the roller 5, the vane 6, the main bearing 7, the auxiliary bearing 8 and the like which constitute the compression chamber 11 to slide. Can be prevented.

【００５８】更に時間が経過して圧縮機が停止すると、
圧縮機内部も時間経過と共に均圧すし、プレート２０ｂ
が給油管２１から離れ、バルブ機構２０内と吸入パイプ
１９とが給油管２１を介して連通する。When the compressor stops after a further time elapses,
The inside of the compressor is pressure-equalized over time, and the plate 20b
Is separated from the oil supply pipe 21, and the inside of the valve mechanism 20 communicates with the suction pipe 19 via the oil supply pipe 21.

【００５９】そして、圧縮機の運転中にバルブ機構２０
内に溜まっていた液冷媒のない潤滑油１８のみがその自
重により給油管２１、吸入パイプ１９内を介して圧縮室
１１内に流入し、圧縮室１１を構成するシリンダ４，ロ
ーラ５，ベーン６，主軸受７，副軸受８等の各摺動部に
供給される。Then, the valve mechanism 20 is operated during the operation of the compressor.
Only the lubricating oil 18 containing no liquid refrigerant that has accumulated inside flows into the compression chamber 11 via the oil supply pipe 21 and the suction pipe 19 due to its own weight, and the cylinder 4, the roller 5, the vane 6 forming the compression chamber 11 , The main bearing 7, the sub bearing 8, etc.

【００６０】従って、圧縮機の停止中に、冷凍サイクル
から吸入パイプ１９を介して圧縮機の圧縮室１１に液冷
媒が戻ってきたり、密閉ケーシング１下部に液冷媒が滞
留しても、バルブ機構２０内を介して液冷媒を圧縮室１
１供給することなくバルブ機構２０内に溜まっていた潤
滑油１８を直接圧縮室１１に供給することができ、圧縮
室１１を構成するシリンダ４，ローラ５，ベーン６，主
軸受７，副軸受８等の各摺動部において、潤滑油が液冷
媒によって取り除かれることを防止できる。そのため、
圧縮機の起動前から圧縮室１１内には十分な潤滑油が供
給されており、圧縮室１１を構成する各摺動部が潤滑油
不足状態で起動することを防止できる。Therefore, even if the liquid refrigerant returns from the refrigeration cycle to the compression chamber 11 of the compressor via the suction pipe 19 while the compressor is stopped, or the liquid refrigerant stays in the lower portion of the closed casing 1, the valve mechanism. The liquid refrigerant is compressed through the inside of the compression chamber 1
The lubricating oil 18 accumulated in the valve mechanism 20 can be directly supplied to the compression chamber 11 without being supplied, and the cylinder 4, the roller 5, the vane 6, the main bearing 7, and the auxiliary bearing 8 constituting the compression chamber 11 can be directly supplied. It is possible to prevent the lubricating oil from being removed by the liquid refrigerant in each sliding portion such as. for that reason,
Sufficient lubricating oil has been supplied into the compression chamber 11 before the compressor is activated, and it is possible to prevent the sliding portions constituting the compression chamber 11 from being activated in the insufficient lubricating oil state.

【００６１】以上のように本実施例の回転式圧縮機は、
吸入パイプの重力方向下方に配設されたタンクと、一端
がバルブ機構の下部に連通し他端がタンクに連通した排
液管と、一端がタンクの上部に連通し他端が吸入パイプ
に連通したガス路と、バルブ機構に連通した排液管の開
口端に配設され潤滑油より比重が大きく且つ液冷媒より
比重が小さい材料にて形成されたフロート機構を備えた
ものであるから、圧縮機の起動直後や圧縮機の停止中に
冷凍サイクルから吸入パイプを介して液冷媒が戻ってき
ても、圧縮機の起動直後から一定時間及び圧縮機の停止
中に、バルブ機構を介して圧縮室内に液冷媒を供給する
ことなく直接潤滑油のみをを供給できる。As described above, the rotary compressor of this embodiment is
A tank disposed below the suction pipe in the direction of gravity, a drain pipe having one end communicating with the lower part of the valve mechanism and the other end communicating with the tank, one end communicating with the upper part of the tank, and the other end communicating with the suction pipe. And a float mechanism formed of a material having a specific gravity larger than that of the lubricating oil and smaller than that of the liquid refrigerant, which is disposed at the opening end of the drain pipe communicating with the valve mechanism. Even if the liquid refrigerant returns from the refrigeration cycle through the suction pipe immediately after the compressor is started or while the compressor is stopped, the compression mechanism is operated via the valve mechanism for a certain period of time immediately after the compressor is started and during the stop of the compressor. It is possible to directly supply only the lubricating oil without supplying the liquid refrigerant to the.

【００６２】そのため、圧縮室を構成する各摺動部にお
いて、常に潤滑油を確保することができるため、各摺動
部が潤滑油不足で運転されることを防止でき、圧縮室を
構成する各摺動部の摩耗等を防止できるため、信頼性が
向上する。Therefore, since the lubricating oil can be always secured in each sliding portion which constitutes the compression chamber, it is possible to prevent each sliding portion from being operated due to lack of lubricating oil, and each sliding portion which constitutes the compression chamber. Since the sliding parts can be prevented from being worn, the reliability is improved.

【００６３】尚、本実施例では、ガス路が吸入パイプに
連通しているが、ガス路がシリンダ内の低圧室や吸入通
路等の、圧縮機の起動により圧力が低下する箇所に連通
していれば同様の効果が得られることは言うまでもな
い。In the present embodiment, the gas passage communicates with the suction pipe, but the gas passage communicates with a low pressure chamber in the cylinder, a suction passage, or the like, where the pressure decreases due to activation of the compressor. Needless to say, the same effect can be obtained.

【００６４】[0064]

【発明の効果】以上説明したように本発明は、一端が密
閉ケーシング外に連通し、他端がシリンダに設けられた
吸入通路に連通した吸入パイプと、密閉ケーシング内に
収納され吸入パイプ、低圧室、吸入通路のいずれかより
重力方向上方に配設されたバルブ機構と、一端がバルブ
機構より重力方向下方に配設された吸入パイプ、低圧
室、吸入通路のいずれかに連通し、他端がバルブ機構の
下部に連通した給油管と、一端がバルブ機構の上部に連
通し、他端が密閉ケーシング内に溜められた潤滑油中に
開口した給油路を備えたものであるから、圧縮機の起動
直後や圧縮機の停止中に冷凍サイクルから液冷媒が戻っ
てきても、圧縮機の起動直後から一定時間及び圧縮機の
停止中に、圧縮室内に直接潤滑油を供給できる。As described above, according to the present invention, one end communicates with the outside of the closed casing and the other end communicates with the suction passage provided in the cylinder, the suction pipe housed in the closed casing, and the low pressure pipe. The valve mechanism disposed above the chamber or the suction passage in the direction of gravity, and one end communicating with the suction pipe disposed below the valve mechanism in the direction of gravity, the low pressure chamber, or the suction passage, and the other end. Is equipped with an oil supply pipe that communicates with the lower part of the valve mechanism, and an oil supply path that has one end communicating with the upper part of the valve mechanism and the other end that opens into the lubricating oil stored in the closed casing. Even if the liquid refrigerant returns from the refrigeration cycle immediately after the start of the compressor or during the stop of the compressor, the lubricating oil can be directly supplied into the compression chamber for a certain period of time immediately after the start of the compressor and during the stop of the compressor.

【００６５】そのため、圧縮室を構成する各摺動部にお
いて、圧縮機の起動と同時に常に潤滑油を確保すること
ができ、且つ圧縮機の起動前から圧縮室に十分な潤滑油
を供給することができる。Therefore, in each of the sliding parts constituting the compression chamber, the lubricating oil can be always secured at the same time when the compressor is started, and sufficient lubricating oil can be supplied to the compression chamber before the compressor is started. You can

【００６６】従って、圧縮室を構成する各摺動部が潤滑
油不足の状態で起動することを防止でき、圧縮室を構成
する各摺動部の摩耗等を防止できるため、信頼性が向上
する。Therefore, it is possible to prevent the sliding parts forming the compression chamber from starting in the state where the lubricating oil is insufficient, and to prevent the sliding parts forming the compression chamber from being worn or the like, so that the reliability is improved. .

【００６７】また、圧縮室を構成する各摺動部の摩耗を
防止することにより、摺動部の加工精度及び潤滑油にて
シールされている各シール部のシール性の低下を防止で
き、圧縮機の効率の低下を防止することができる。Further, by preventing the sliding parts constituting the compression chamber from being worn, it is possible to prevent the processing accuracy of the sliding parts and the deterioration of the sealing property of each sealing part sealed by the lubricating oil from being deteriorated. It is possible to prevent the efficiency of the machine from decreasing.

【００６８】また、圧縮機の運転が続くと、圧縮室内へ
の給油は、従来のローラと主軸受，副軸受間の隙間及び
ベーンとシリンダの溝間の隙間を介しての供給となる。
そのため、圧縮室内に過多の潤滑油が供給されオイル圧
縮を引き起こすこともなく、また圧縮機から冷凍サイク
ルへ流出する潤滑油量が増大することもない。When the compressor continues to be operated, oil is supplied into the compression chamber through the gap between the conventional roller and the main bearing and the sub bearing, and the gap between the vane and the groove of the cylinder.
Therefore, the excessive amount of lubricating oil is not supplied to the compression chamber to cause oil compression, and the amount of lubricating oil flowing from the compressor to the refrigeration cycle does not increase.

【００６９】また、吸入パイプの重力方向下方に配設さ
れたタンクと、一端がバルブ機構の下部に連通し他端が
タンクに連通した排液管と、一端がタンクの上部に連通
し他端が吸入パイプに連通したガス路と、バルブ機構に
連通した排液管の開口端に配設され潤滑油より比重が大
きく且つ液冷媒より比重が小さい材料にて形成されたフ
ロート機構を備えたものであるから、圧縮機の起動直後
に冷凍サイクルから吸入パイプを介して液冷媒が戻って
きても、圧縮室を構成するシリンダ，ローラ，ベーン，
主軸受，副軸受等の各摺動部に付着している潤滑油を取
り除いても、圧縮機の起動直後から一定時間、バルブ機
構を介して圧縮室内に液冷媒を供給することなく直接潤
滑油のみをを供給できる。Further, a tank disposed below the suction pipe in the direction of gravity, a drain pipe having one end communicating with the lower portion of the valve mechanism and the other end communicating with the tank, and one end communicating with the upper portion of the tank. With a gas passage communicating with the suction pipe and a float mechanism formed at the open end of the drainage pipe communicating with the valve mechanism and made of a material having a specific gravity higher than that of the lubricating oil and lower than that of the liquid refrigerant. Therefore, even if the liquid refrigerant returns from the refrigeration cycle through the suction pipe immediately after the compressor is started, the cylinders, rollers, vanes,
Even if the lubricating oil adhering to the sliding parts such as the main bearing and the auxiliary bearing is removed, the lubricating oil is directly supplied to the compression chamber through the valve mechanism for a certain period of time immediately after the compressor starts up. Can only supply.

【００７０】またさらに、圧縮機の停止中に、冷凍サイ
クルから吸入パイプを介して圧縮室に液冷媒が戻ってき
ても、圧縮機の停止中にバルブ機構を介して圧縮室内に
液冷媒を供給することなく直接潤滑油のみをを供給でき
る。そのため、圧縮室を構成する各摺動部において、常
に潤滑油を確保することができるため、各摺動部が潤滑
油不足で運転されることを防止でき、圧縮室を構成する
各摺動部の摩耗等を防止できるため、信頼性が向上す
る。Furthermore, even if the liquid refrigerant returns from the refrigeration cycle to the compression chamber through the suction pipe while the compressor is stopped, the liquid refrigerant is supplied into the compression chamber through the valve mechanism while the compressor is stopped. It is possible to directly supply only the lubricating oil without doing so. Therefore, since the lubricating oil can be always secured in each sliding portion that constitutes the compression chamber, it is possible to prevent each sliding portion from being operated due to insufficient lubricating oil, and each sliding portion that constitutes the compression chamber. Since it is possible to prevent abrasion and the like, reliability is improved.

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

【図１】本発明による第１の実施例を示す回転式圧縮機
の要部断面図FIG. 1 is a sectional view of a main part of a rotary compressor showing a first embodiment according to the present invention.

【図２】同実施例の回転式圧縮機の縦断面図FIG. 2 is a vertical cross-sectional view of the rotary compressor of the same embodiment.

【図３】本発明による第２の実施例を示す回転式圧縮機
の要部断面図FIG. 3 is a sectional view of an essential part of a rotary compressor showing a second embodiment according to the present invention.

【図４】従来の回転式圧縮機の縦断面図FIG. 4 is a vertical sectional view of a conventional rotary compressor.

【図５】図４のＡ−Ａ線断面図5 is a sectional view taken along line AA of FIG.

【符号の説明】[Explanation of symbols]

１ 密閉ケーシング ３ シャフト ４ シリンダ ５ ローラ ６ ベーン ７ 主軸受 ８ 副軸受 １１ａ 高圧室 １１ｂ 低圧室 １４ 吸入通路 １８ 潤滑油 １９ 吸入パイプ ２０ バルブ機構 ２１ 給油管 ２２ 給油路 ２３ タンク ２４ 排液管 ２４ａ 排液管の開口端 ２５ ガス路 ２６ フロート機構 1 Closed Casing 3 Shaft 4 Cylinder 5 Roller 6 Vane 7 Main Bearing 8 Secondary Bearing 11a High Pressure Chamber 11b Low Pressure Chamber 14 Suction Passage 18 Lubricating Oil 19 Suction Pipe 20 Valve Mechanism 21 Oil Supply Pipe 22 Oil Supply Line 23 Tank 24 Drainage Pipe 24a Drainage Open end of pipe 25 Gas path 26 Float mechanism

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 密閉ケーシングと、前記密閉ケーシング
内に収納されたシリンダと、前記シリンダの両端に固定
された主軸受および副軸受と、前記主軸受と副軸受内を
回転摺動するシャフトと、前記シリンダ内を偏心回転す
るローラと、前記シリンダの溝内を往復運動し前記ロー
ラと当接することにより前記シリンダ内を低圧室と高圧
室に分割するベーンと、一端が前記密閉ケーシング外に
連通し、他端が前記シリンダに設けられた吸入通路に連
通した吸入パイプと、前記密閉ケーシング内に収納され
前記吸入パイプ、前記低圧室、前記吸入通路のいずれか
より重力方向上方に配設されたバルブ機構と、一端が前
記バルブ機構より重力方向下方に配設された前記吸入パ
イプ、前記低圧室、前記吸入通路のいずれかに連通し、
他端が前記バルブ機構の下部に連通した給油管と、一端
が前記バルブ機構の上部に連通し、他端が前記密閉ケー
シング内に溜められた潤滑油中に開口した給油路とから
なる回転式圧縮機。1. A hermetically sealed casing, a cylinder housed in the hermetically sealed casing, a main bearing and a sub bearing fixed to both ends of the cylinder, and a shaft which rotationally slides in the main bearing and the sub bearing. A roller that eccentrically rotates in the cylinder, a vane that reciprocates in a groove of the cylinder and contacts the roller to divide the cylinder into a low pressure chamber and a high pressure chamber, and one end communicates with the outside of the closed casing. A suction pipe having the other end communicating with a suction passage provided in the cylinder, and a valve housed in the closed casing and disposed above the suction pipe, the low pressure chamber, or the suction passage in the direction of gravity. A mechanism, one end of which communicates with any one of the suction pipe, the low pressure chamber, and the suction passage, which are arranged below the valve mechanism in the direction of gravity.
A rotary type including an oil supply pipe having the other end communicating with the lower portion of the valve mechanism, and an oil supply passage having one end communicating with the upper portion of the valve mechanism and the other end opening into the lubricating oil accumulated in the closed casing. Compressor. 【請求項２】 吸入パイプ、低圧室、吸入通路のいずれ
かの重力方向下方に配設されたタンクと、一端がバルブ
機構の下部に連通し他端が前記タンクに連通した排液管
と、一端が前記タンクの上部に連通し他端が前記吸入パ
イプ、前記低圧室、前記吸入通路のいずれかに連通した
ガス路と、前記バルブ機構に連通した前記排液管の開口
端に配設され潤滑油より比重が大きく且つ液冷媒より比
重が小さい材料にて形成されたフロート機構とからなる
請求項１記載の回転式圧縮機。2. A tank disposed below a suction pipe, a low pressure chamber, or a suction passage in the direction of gravity, and a drain pipe having one end communicating with a lower portion of a valve mechanism and the other end communicating with the tank. One end is connected to the upper part of the tank and the other end is arranged at a gas passage communicating with any one of the suction pipe, the low pressure chamber, and the suction passage, and an opening end of the drain pipe communicating with the valve mechanism. The rotary compressor according to claim 1, further comprising a float mechanism formed of a material having a specific gravity higher than that of the lubricating oil and a specific gravity lower than that of the liquid refrigerant.