JPH0730743B2 - Rotary compressor - Google Patents
Rotary compressorInfo
- Publication number
- JPH0730743B2 JPH0730743B2 JP60168055A JP16805585A JPH0730743B2 JP H0730743 B2 JPH0730743 B2 JP H0730743B2 JP 60168055 A JP60168055 A JP 60168055A JP 16805585 A JP16805585 A JP 16805585A JP H0730743 B2 JPH0730743 B2 JP H0730743B2
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- Prior art keywords
- compression
- stage
- compressor
- refrigerant
- rotary compressor
- Prior art date
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Description
【発明の詳細な説明】 〔発明の技術分野〕 この発明は、空気調和装置，冷蔵庫等に用いられるロー
タリコンプレッサに関する。Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a rotary compressor used in an air conditioner, a refrigerator, and the like.
空気調和装置，冷蔵庫等に用いられるロータリコンプレ
ッサにあっては、２つの圧縮室を使って冷媒を圧縮する
ようにしたものがある。こうしたロータリコンプレッサ
の圧縮機部には、従来、第７図に示すようにシリンダａ
に、複数の圧縮室b,cを形成するための２つのブレード
d,dを対角に設けて吸入管e,eからそれぞれ圧縮室b,cに
冷媒を吸込むようにして、各吸込んだ冷媒を各圧縮室b,
cで圧縮した後、密閉ケースｆ内に吐出させ、その後、
密閉ケースｆの外部へ吐出するようにしたものが採用さ
れていた。Some rotary compressors used in air conditioners, refrigerators and the like use two compression chambers to compress the refrigerant. In the compressor section of such a rotary compressor, a cylinder a is conventionally used as shown in FIG.
And two blades for forming a plurality of compression chambers b and c
d and d are provided diagonally so that the refrigerant is sucked from the suction pipes e and e into the compression chambers b and c, respectively, and the sucked refrigerant is transferred to the compression chambers b and c.
After compressing with c, it is discharged into the closed case f, and then
A device that discharges to the outside of the closed case f has been adopted.
ところが、こうしたロータリコンプレッサは、低圧から
高圧に一度に圧縮するために１圧縮当りのトルク変動が
大きい問題をもっている。このため、振動ならびに騒音
の点で良くない事情にあった。しかも、こうした一段の
圧縮は高圧縮比運転の限界が低い問題をもっていた。However, such a rotary compressor has a problem of large fluctuation in torque per compression because it compresses from low pressure to high pressure at a time. For this reason, there was a bad situation in terms of vibration and noise. Moreover, such single-stage compression has a problem that the limit of high compression ratio operation is low.
この発明はこのような問題点に着目してなされたもの
で、その目的とするところは、複数の圧縮室を使って、
トルク変動を小さく、かつ高圧縮比運転を可能としたロ
ータリコンプレッサを提供することにある。The present invention was made in view of such problems, and the purpose thereof is to use a plurality of compression chambers,
An object of the present invention is to provide a rotary compressor that has a small torque fluctuation and is capable of high compression ratio operation.
この発明は、密閉ケース内に電動機部とこの電動機部に
直結した圧縮機部を設けてなるロータリコンプレッサに
おいて、圧縮機部は、１つのベーンを配したシリンダを
複数連設して複数の圧縮室を構成して流体を順次多段圧
縮し、複数の圧縮室の内、いずれか１つの圧縮室で圧縮
された流体を密閉ケース内に吐出し、ケース内を中間圧
にするすることで、必要な圧力を多段圧縮から得て、１
圧縮当りのトルク変動を小さくする他、多段圧縮によっ
て高圧縮比を得ることができるようにしようとするもの
である。さらに、ケース内を中間圧にできるので、高圧
縮比運転を可能にしながら、密閉ケース内の温度を低く
でき、電動機部が熱によって劣化したり、密閉ケース内
に集溜された潤滑油が分解することを防止できる。The present invention relates to a rotary compressor having an electric motor unit and a compressor unit directly connected to the electric motor unit in a hermetically sealed case, wherein the compressor unit has a plurality of cylinders with one vane arranged in series and a plurality of compression chambers. Is configured to sequentially compress the fluid in multiple stages, and the fluid compressed in any one of the plurality of compression chambers is discharged into the closed case, and the pressure in the case is set to an intermediate pressure. The pressure is obtained from multi-stage compression, 1
In addition to reducing the torque fluctuation per compression, it is intended to obtain a high compression ratio by multistage compression. Furthermore, since the pressure inside the case can be set to an intermediate pressure, the temperature inside the closed case can be lowered while enabling high compression ratio operation, and the motor part is deteriorated by heat and the lubricating oil collected in the closed case is decomposed. Can be prevented.
以下、この発明を第１図ないし第３図に示す第１の実施
例にもとづいて説明する。第１図は空気調和装置，冷蔵
庫などに用いられるロータリコンプレッサの平断図を、
第２図は側断図をそれぞれ示し、１は密閉ケース、２は
その密閉ケース１内の上段に設置された電動機部、３は
密閉ケース１内の下段に設置された圧縮機部である。電
動機部２は、固定子2aと回転子2bから構成される。また
圧縮機部３はつぎのようになっている。The present invention will be described below with reference to the first embodiment shown in FIGS. Figure 1 is a cross-sectional view of a rotary compressor used in air conditioners, refrigerators, etc.
FIG. 2 shows side sectional views, respectively, 1 is a sealed case, 2 is an electric motor section installed in the upper stage of the sealed case 1, and 3 is a compressor section installed in the lower stage of the sealed case 1. The electric motor unit 2 is composed of a stator 2a and a rotor 2b. The compressor unit 3 is as follows.
すなわち、４はシリンダ、５および６はシリンダ４の上
下両側にシリンダ４を挟むよに設置されたメインベアリ
ングおよびサブベアリング、７はそのメインベアリング
５およびサブベアリング６で囲まれて形成されるシリン
ダ室に偏心回転自在に配したローラ、８はメインベアリ
ング５の側面の大部分を覆うようにしてメインベアリン
グ５の外周面に取着された上部バルブカバー（マフラー
を兼ねる）、９はサブベアリング６の側面を覆うように
してサブベアリング６の外周面に取着された下部バルブ
カバー（マフラーを兼ねる）である。そして、シリンダ
４には、シリンダ４の中心に対し両側に位置して、２つ
のブレード10a,10bがローラ７の外周面に対し進退可能
に設けられていて、２つのブレード10a,10bをむすぶ線
上の両側にそれぞれ２つ（複数）の圧縮室A,B,吸込室C,
Dを形成する構造としている。なお、ブレード10a,10b間
は圧縮室B,吸込室Ｄ側が圧縮室A,吸込室Ｃ側に比べ狭く
定められ、圧縮室Ｂの排除容積の比を圧縮室Ａに対し小
さくしている。もちろん、各圧縮室A,B,吸込室C,Dはブ
レード10a,10b間でなされるローラ７のシリンダ４の内
周面に対する摺接によって形成される。一方、シリンダ
にはブレード10aに隣接して圧縮室Ａ側に吐出ポート11a
が設けられている他、ブレード10bに隣接して吸込室Ｃ
側に吸込ポート12aが設けられている。さらにシリンダ
４にはブレード10bに隣接して圧縮室Ｂに吐出ポート11b
が設けられている他、ブレード10aに隣接して吸込室Ｄ
側に吸込ポート12bが設けられている。そして、各ポー
トのうち吸込ポート12aは密閉ケース１を貫通してシリ
ンダ４に連結された吸込管13に接続され、吐出ポート11
aはサブベアリング６に設けた、吐出部14（吐出孔14aな
らびに吐出弁14bで構成されるもの）を通じ下部バルブ
カバー９内に連通される他、吸込ポート12bは密閉ケー
ス１内に連通され、吐出ポート11bはメインベアリング
５に設けた、吐出部16（吐出孔16aならびに吐出弁16bで
構成されるもの）を通じ上部バルブカバー８内に連通さ
れていて、ローラ７を矢印の方向（時計回り）へ回転さ
せることにより、ブレード10a,ブレード10bを境とした
両側で冷媒（流体）を圧縮することができるようにして
いる。また下部バルブカバー９内と密閉ケース１内と
は、サブベアリング6,シリンダ4,メインベアリング５の
厚み方向に渡り形成された連通孔17で連通され、上部バ
ルブカバー８には密閉ケース１を介し吐出管18が接続さ
れていて、吸込管13から吸込まれる冷媒を一方の排除容
積が大きい圧縮室Ａで１段圧縮，その中間圧となった冷
媒を密閉ケース１内に放出，その放出した冷媒を他方の
排除容積が小さい圧縮室Ｂで２段圧縮してケース外部へ
吐出させることができる構造としている。つまり、複数
の圧縮室A,Bで順次冷媒を多段圧縮させて、高圧圧力の
冷媒を得ることができるようにしている。That is, 4 is a cylinder, 5 and 6 are main bearings and sub-bearings installed on both upper and lower sides of the cylinder 4 so as to sandwich the cylinder 4, and 7 is a cylinder chamber formed by being surrounded by the main bearings 5 and sub-bearings 6. , 8 is an eccentrically rotatable roller, 8 is an upper valve cover (also serves as a muffler) attached to the outer peripheral surface of the main bearing 5 so as to cover most of the side surface of the main bearing 5, and 9 is a sub-bearing 6. The lower valve cover (also serves as a muffler) is attached to the outer peripheral surface of the sub-bearing 6 so as to cover the side surface. Further, the cylinder 4 is provided with two blades 10a and 10b located on both sides of the center of the cylinder 4 so as to be able to move forward and backward with respect to the outer peripheral surface of the roller 7. Two (plural) compression chambers A and B, suction chambers C, on both sides of
It has a structure that forms D. Between the blades 10a and 10b, the compression chamber B and suction chamber D sides are set narrower than the compression chamber A and suction chamber C sides, and the ratio of the excluded volume of the compression chamber B to the compression chamber A is made smaller. Of course, the compression chambers A and B and the suction chambers C and D are formed by sliding contact of the roller 7 between the blades 10a and 10b with the inner peripheral surface of the cylinder 4. On the other hand, in the cylinder, the discharge port 11a is provided on the compression chamber A side adjacent to the blade 10a.
Is provided in addition to the suction chamber C adjacent to the blade 10b.
The suction port 12a is provided on the side. Further, in the cylinder 4, the discharge port 11b is provided in the compression chamber B adjacent to the blade 10b.
Is provided in addition to the suction chamber D adjacent to the blade 10a.
A suction port 12b is provided on the side. The suction port 12a of each port is connected to the suction pipe 13 that penetrates the sealed case 1 and is connected to the cylinder 4, and the discharge port 11a.
a is communicated with the lower valve cover 9 through a discharge part 14 (which is composed of the discharge hole 14a and the discharge valve 14b) provided in the sub-bearing 6, and the suction port 12b is communicated with the sealed case 1. The discharge port 11b is connected to the inside of the upper valve cover 8 through the discharge portion 16 (which is composed of the discharge hole 16a and the discharge valve 16b) provided in the main bearing 5, and the roller 7 is moved in the direction of the arrow (clockwise). By rotating the blades 10a, 10b, the refrigerant (fluid) can be compressed on both sides of the blade 10a, 10b. Further, the inside of the lower valve cover 9 and the inside of the sealed case 1 are communicated with each other through a communication hole 17 formed in the thickness direction of the sub bearing 6, the cylinder 4, and the main bearing 5, and the sealed case 1 is interposed between the upper valve cover 8 and the upper valve cover 8. The discharge pipe 18 is connected, and the refrigerant sucked from the suction pipe 13 is compressed by one stage in the compression chamber A having a large displacement volume on one side, and the intermediate pressure of the refrigerant is discharged into the closed case 1 and then discharged. The structure is such that the refrigerant can be compressed in two stages in the other compression chamber B having a small excluded volume and discharged to the outside of the case. That is, the refrigerant is successively compressed in multiple stages in the plurality of compression chambers A and B to obtain a high-pressure refrigerant.
そして、密閉ケース１内において圧縮機部３のローラ７
と電動機部２の回転子2bとは、回転軸19（クランクシャ
フト）を介して連結されている。これにより、複数の圧
縮室A,Cを有する圧縮機部２は、密閉ケース１内に収容
された単一の電動機部２を駆動源として、共通の回転軸
19にて回転駆動されるようになっている。そして、図示
はしないが、こうして構成されたロータリコンプレッサ
に、冷凍サイクル機器が順次連結されて、空気調和装置
あるいは冷蔵庫などの冷凍サイクルを構成する。Then, in the closed case 1, the roller 7 of the compressor unit 3 is
The rotor 2b of the electric motor unit 2 are connected to each other via a rotary shaft 19 (crankshaft). As a result, the compressor unit 2 having the plurality of compression chambers A and C uses the single electric motor unit 2 housed in the sealed case 1 as a drive source and has a common rotary shaft.
It is designed to be rotated at 19. Although not shown, refrigeration cycle equipment is sequentially connected to the thus-configured rotary compressor to form a refrigeration cycle such as an air conditioner or a refrigerator.
つぎに、このように構成されたロータリコンプレッサの
作用について説明する。今、電動機部２を励磁する。こ
れにより、回転子2bから得られた回転力が回転軸19を介
してローラ７へ伝達される。そして、このローラ７の偏
心回転に伴い、冷凍サイクルの蒸発器（図示しない）か
ら冷媒が吸込管13ならびに吸込ポート12aからシリンダ
４内へ吸込まれる。そして、吸込まれた冷媒は１段目の
吸込室Ｃを経て１段目の圧縮室Ａに至り、ここで１段目
の圧縮が行われる。この段階では冷媒は、それ程、高温
高圧でない、中間の圧力に圧縮される。そして、この中
間圧力をもつ冷媒は、吐出孔14a,吐出弁14bを経て下部
バルブカバー９内に吐出され、連通孔17,上部バルブカ
バー８内を経て密閉ケース１内に吐出されていく。この
密閉ケース１内へ吐出する段階で、冷媒と共に吸込まれ
た潤滑油が分離され、密閉ケース１の内底部に形成され
た油溜め部20へ集溜されていく。一方、密閉ケース１内
に吐出された冷媒は、吸込ポート12bから再びシリンダ
４内に吸込まれ、２段目の吸込室Ｄを経て２段目の圧縮
室Ｂに至る。そして、この圧縮室Ｂで２段目の圧縮が行
われ、中間圧の冷媒を高温な高圧圧力にまで圧縮するこ
とになる。そして、この高圧（高温）圧力となった冷媒
が吐出孔16a,吐出弁16b,上部バルブカバー８を経て吐出
管18から冷凍サイクルの凝縮器（図示しない）へ吐出さ
れていく。Next, the operation of the rotary compressor thus configured will be described. Now, the motor unit 2 is excited. As a result, the rotational force obtained from the rotor 2b is transmitted to the roller 7 via the rotary shaft 19. Then, with the eccentric rotation of the roller 7, the refrigerant is sucked from the evaporator (not shown) of the refrigeration cycle into the cylinder 4 through the suction pipe 13 and the suction port 12a. Then, the sucked refrigerant passes through the first-stage suction chamber C and reaches the first-stage compression chamber A, where the first-stage compression is performed. At this stage, the refrigerant is compressed to an intermediate pressure, which is not so high temperature and high pressure. Then, the refrigerant having this intermediate pressure is discharged into the lower valve cover 9 through the discharge hole 14a and the discharge valve 14b, and is discharged into the closed case 1 through the communication hole 17 and the upper valve cover 8. At the stage of discharging into the closed case 1, the lubricating oil sucked together with the refrigerant is separated and collected in the oil reservoir 20 formed on the inner bottom of the closed case 1. On the other hand, the refrigerant discharged into the closed case 1 is sucked into the cylinder 4 again from the suction port 12b, and reaches the second-stage compression chamber B through the second-stage suction chamber D. Then, the second stage compression is performed in this compression chamber B, and the intermediate pressure refrigerant is compressed to a high temperature and high pressure. Then, the refrigerant having the high pressure (high temperature) is discharged from the discharge pipe 18 to the condenser (not shown) of the refrigeration cycle through the discharge hole 16a, the discharge valve 16b, and the upper valve cover 8.
しかるに、必要な冷媒の圧力を２段（多段）圧縮から得
ることができることとなる。この結果、１圧縮当りのト
ルク変動は小さく（滑らか）なり、その分、振動，騒音
を減少させることができる。しかも、１段目の圧縮を従
来と同様の圧力にすれば、高圧縮比の運転が可能で、２
段目の圧縮分、圧力ならびに温度が高い吐出冷媒が得ら
れる利点をもつ。特に、高圧縮比運転は冷凍サイクルの
蒸発器の温度を低くすることができ、極低温用冷凍装置
などに有効である。Therefore, the required refrigerant pressure can be obtained from the two-stage (multi-stage) compression. As a result, the torque fluctuation per compression becomes small (smooth), and vibration and noise can be reduced accordingly. Moreover, if the pressure of the first stage is set to the same pressure as the conventional one, it is possible to operate at a high compression ratio.
It has an advantage that a discharged refrigerant having a high compression amount, pressure and temperature can be obtained. In particular, the high compression ratio operation can lower the temperature of the evaporator of the refrigeration cycle and is effective for a cryogenic refrigeration system and the like.
そのうえ、複数の圧縮室A,Cにおける圧縮運転は、共通
の密閉ケース１内に収容されている単一の電動器部２の
駆動力を共通の回転軸19に伝えることで行われるから、
駆動系は共通ですみ、小スペースで多段圧縮ができる。Moreover, the compression operation in the plurality of compression chambers A and C is performed by transmitting the driving force of the single electric motor section 2 housed in the common closed case 1 to the common rotary shaft 19,
The drive system is common, and multi-stage compression is possible in a small space.
また、上述した実施例のように１段圧縮した冷媒を一
旦、密閉ケース１内に放出して後、２段圧縮を行なうよ
うにした構造は、第３図に示すモリエル線図でも示すよ
うにコンプレッサの吸込圧力Psとコンプレッサの吐出圧
力Pdとの中間上、温度の低い中間圧力Pmが密閉ケース１
内に吐出するために、密閉ケース１内の温度を低くしつ
つ、吐出圧力だけを高めることができる利点をもち、電
動機部２が熱によって劣化，密閉ケース１内に集溜され
た潤滑油21が分解するなどの支障を防止つつ高圧の吐出
圧力を得ることができる効果をもたらす。なお、第３図
においてTdは吐出圧力Pdの温度、Tmは中間圧力Pmの温度
を示す。しかも、密閉ケース１の容積で吐出脈動を極め
て小さくなった冷媒が圧縮されるために２段目における
吸入効率は高く、効率に優れた運転を行なうことができ
る利点もある。加えて、こうした２段圧縮ならびに密閉
ケース１内に冷媒を吐出するものは、液冷媒に対しても
優れた効果を奏する。すなわち、急激に液冷媒を吸込む
と、１段目の圧縮では摺動部品が液圧縮のショックを受
けるが、そのショックは圧縮室が分割されているために
小さくてすむ。しかも、密閉ケース１内に吐出された冷
媒が再び圧縮されるために、密閉ケース１がアキューム
レータの役割をはたして２段目の圧縮における液吸込み
をほとんどなくすことができるなどが挙げられる。こう
したことは、ロータリコンプレッサで必要とされる外部
アキュームレータをなくす、あるいは小形化にすること
にもつながり、その効果は高い。Further, as in the above-described embodiment, the structure in which the refrigerant compressed in the first stage is once discharged into the closed case 1 and then the second stage compression is performed is as shown in the Mollier diagram shown in FIG. Intermediate pressure Pm with a low temperature, which is intermediate between the suction pressure Ps of the compressor and the discharge pressure Pd of the compressor, is the closed case 1.
In order to discharge the oil into the inside, the temperature inside the closed case 1 can be lowered, and only the discharge pressure can be increased. The motor part 2 is deteriorated by heat, and the lubricating oil 21 collected in the closed case 1 There is an effect that a high discharge pressure can be obtained while preventing the trouble such as the decomposition of the. In FIG. 3, Td represents the temperature of the discharge pressure Pd, and Tm represents the temperature of the intermediate pressure Pm. Moreover, since the refrigerant whose discharge pulsation is extremely small due to the volume of the closed case 1 is compressed, the suction efficiency in the second stage is high, and there is an advantage that an operation with excellent efficiency can be performed. In addition, the two-stage compression and the discharge of the refrigerant into the closed case 1 have an excellent effect on the liquid refrigerant. That is, when liquid refrigerant is rapidly sucked, the sliding component receives a shock of liquid compression in the first stage compression, but the shock is small because the compression chamber is divided. In addition, since the refrigerant discharged into the closed case 1 is compressed again, the closed case 1 serves as an accumulator, and the liquid suction in the second-stage compression can be almost eliminated. This leads to elimination or miniaturization of the external accumulator required in the rotary compressor, and its effect is high.
また、上述の実施例のようにブレード10a,10bの配置を
変えて、２段目の圧縮空間を１段目の圧縮空間に対し小
さくする構造は、２段目の圧縮における吸入圧力の低下
（ワイヤドローイング）を少なくすることができる利点
をもち、その分、圧縮効率を高める効果をもたらす。Further, the structure in which the arrangement of the blades 10a and 10b is changed to make the compression space of the second stage smaller than the compression space of the first stage as in the above-described embodiment has a decrease in suction pressure in the compression of the second stage ( This has the advantage that the wire drawing) can be reduced, and the compression efficiency is increased accordingly.
また、この発明は上述した第１の実施例に限定されるも
のではなく、第４図ないし第６図に示す第２の実施例の
ようにしてもよい。第２の実施例は、第１の実施例おけ
る複数のブレードを用いて複数の圧縮室を構成して、冷
媒を順次多段圧縮するようにしたものに代わり、１つの
ベーンを配したシリンダを複数連設して複数の圧縮室を
構成したものである。詳しくは、中間ベアリング30の一
方のシール面上に第５図に示すような１つのシリンダ31
に対し各々１つのローラ32,ベーン33を配した、従来の
１段圧縮と同じ構成の圧縮機器を設ける他、他方のシー
ル面上に第６図に示すような同じく１つのシリンダ41に
対し各々１つのローラ42,ベーン43を配した圧縮部を設
けて、下段を１段目，上段を２段目とした複数の圧縮室
A,Cを構成する。なお、44はメインベアリング、45はサ
ブベアリングである。そして、１段目のシリンダ31の吸
込側に吸入管13を接続、２段目のシリンダ41の吐出側に
吐出管18を吐出部16を介し接続する他、１段目のシリン
ダ31の吐出側に下部バルブカバー９内に開口する吐出部
14を設け、２段目のシリンダ31の吸込側に密閉ケース１
内に開口する吸込ポート44を設ける。そして、サブベア
リング45,シリンダ31,中間ベアリング30,シリンダ41,メ
インベアリング44の厚み方向に渡り、下部バルブカバー
９内と密閉ケース１内と連通する連通孔46を設けて、圧
縮機部３を構成したものである。もちろん、各ローラ3
2,42は回転軸19に連結される。Further, the present invention is not limited to the above-mentioned first embodiment, but may be applied to a second embodiment shown in FIGS. 4 to 6. In the second embodiment, a plurality of compression chambers are formed by using the plurality of blades in the first embodiment so that the refrigerant is sequentially compressed in multiple stages. A plurality of compression chambers are arranged in series. Specifically, one cylinder 31 as shown in FIG. 5 is provided on one sealing surface of the intermediate bearing 30.
A compression device having the same structure as the conventional one-stage compression, in which one roller 32 and one vane 33 are arranged, is provided for each cylinder, and one cylinder 41 is also provided on the other sealing surface as shown in FIG. A plurality of compression chambers with a lower part as the first stage and an upper part as the second stage are provided by providing a compression part in which one roller 42 and vane 43 are arranged
Configure A and C. In addition, 44 is a main bearing and 45 is a sub bearing. The suction pipe 13 is connected to the suction side of the first-stage cylinder 31, the discharge pipe 18 is connected to the discharge side of the second-stage cylinder 41 via the discharge portion 16, and the discharge side of the first-stage cylinder 31 is connected. Discharge part that opens into the lower valve cover 9
14 is provided, and a closed case 1 is provided on the suction side of the second-stage cylinder 31.
A suction port 44 opening inside is provided. Then, a communication hole 46 that communicates with the inside of the lower valve cover 9 and the inside of the closed case 1 is provided in the thickness direction of the sub bearing 45, the cylinder 31, the intermediate bearing 30, the cylinder 41, and the main bearing 44, and the compressor unit 3 is provided. It is composed. Of course, each roller 3
2, 42 are connected to the rotary shaft 19.
こうした圧縮機部３の作用としては、回転軸19の回転に
伴い、吸込管13から吸込まれた冷媒を１段目のシリンダ
31内で圧縮し、その圧縮した冷媒が吐出部14,下部バル
ブカバー９内，連通孔46を通じ密閉ケース１内に吐出さ
れる。そして、その密閉ケース１内の冷媒が吸込ポート
44を通じ、２段目のシリンダ41に吸込まれて圧縮され、
その２段圧縮された冷媒が吐出管18から冷凍サイクル機
器へ吐出される。The operation of the compressor section 3 is such that the refrigerant sucked from the suction pipe 13 in accordance with the rotation of the rotary shaft 19 causes the first stage cylinder to
The compressed refrigerant in 31 is discharged into the closed case 1 through the discharge part 14, the lower valve cover 9 and the communication hole 46. Then, the refrigerant in the closed case 1 is a suction port.
Through 44, it is sucked into the second stage cylinder 41 and compressed,
The two-stage compressed refrigerant is discharged from the discharge pipe 18 to the refrigeration cycle device.
このようにしても上述した第１の実施例と同様の効果を
奏する。但し、第４図ないし第６図において、第１の実
施例と同一構成部分は同一符号を附してその説明を省略
した。Even in this case, the same effect as that of the first embodiment described above can be obtained. However, in FIGS. 4 to 6, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted.
なお、第１および第２の実施例共、２つの圧縮室を使っ
て多段圧縮するようにしたものを一例に挙げたが、これ
に限らず、３段以上の多段圧縮としてもよい。In addition, in both the first and second embodiments, the example in which two compression chambers are used to perform multi-stage compression is given as an example, but the present invention is not limited to this, and multi-stage compression of three or more stages may be performed.
〔発明の効果〕 以上説明したようにこの発明によれば、必要な圧力を多
段圧縮から得て、１圧縮当りのトルク変動を小さくする
ことができる他、多段圧縮によって高圧縮比運転を可能
とすることができる。さらに、ケース内を中間圧にでき
るので、高圧縮比運転を可能にしながら、密閉ケース内
の温度を低くでき、電動機部が熱によって劣化したり、
密閉ケース内に集溜された潤滑油が分解することを防止
できる。[Effects of the Invention] As described above, according to the present invention, necessary pressure can be obtained from multi-stage compression to reduce torque fluctuation per compression, and multi-stage compression enables high compression ratio operation. can do. Furthermore, since the pressure inside the case can be set to an intermediate pressure, the temperature inside the closed case can be lowered while enabling high compression ratio operation, and the motor part is deteriorated by heat,
It is possible to prevent the lubricating oil collected in the closed case from being decomposed.
第１図ないし第３図はこの発明の第１の実施例を示し、
第１図はロータリコンプレッサの圧縮機部を示す平断面
図、第２図は圧縮機部を、ロータリコンプレッサの全体
の構造と共に示す側断面図、第３図は密閉ケース内に中
間圧を吐出して多段圧縮したときの変化状態を示すモリ
エル線図、第４図ないし第６図はこの発明の第２の実施
例を示し、第４図はロータリコンプレッサの側断面図、
第５図はその圧縮機部の下段側の構造を示す平断面図、
第６図はその圧縮機部の上段側の構造を示す平断面図、
第７図が従来の２つの圧縮室を使ったロータリコンプレ
ッサを示す平断面図である。 １……密閉ケース、２……電動機部、３……圧縮機部、
19……回転軸（クランシャフト）、A,C……圧縮室。1 to 3 show a first embodiment of the present invention,
FIG. 1 is a plan sectional view showing a compressor section of a rotary compressor, FIG. 2 is a side sectional view showing the compressor section together with the entire structure of the rotary compressor, and FIG. 3 shows an intermediate pressure discharged into a hermetically sealed case. 4 and 6 show a second embodiment of the present invention, and FIG. 4 is a side sectional view of a rotary compressor.
FIG. 5 is a plan sectional view showing the structure of the lower stage of the compressor section,
FIG. 6 is a plan sectional view showing the structure of the upper stage of the compressor section,
FIG. 7 is a plan sectional view showing a conventional rotary compressor using two compression chambers. 1 ... Hermetically sealed case, 2 ... Electric motor part, 3 ... Compressor part,
19 …… Rotary shaft (cran shaft), A, C …… Compression chamber.
Claims (3)
直結した圧縮機部を設けてなるロータリコンプレッサに
おいて、前記圧縮機部は、１つのベーンを配したシリン
ダを複数連設して複数の圧縮室を構成して流体を順次多
段圧縮し、複数の圧縮室の内、いずれか１つの圧縮室で
圧縮された流体を前記密閉ケース内に吐出し、ケース内
を中間圧にしたことを特徴するロータリコンプレッサ。1. A rotary compressor comprising an electric motor section and a compressor section directly connected to the electric motor section in a hermetically sealed case, wherein the compressor section comprises a plurality of cylinders with one vane arranged in series. The compression chamber is configured to sequentially compress the fluid in multiple stages, and the fluid compressed in any one of the plurality of compression chambers is discharged into the closed case, and the pressure inside the case is set to an intermediate pressure. Rotary compressor.
方向に連設し、流体を下段の圧縮室から上段の電動機部
側の圧縮室の順に多段圧縮したことを特徴とする特許請
求の範囲第１項に記載のロータリコンプレッサ。2. The compressor section is characterized in that a plurality of the cylinders are connected in a vertical direction and a fluid is multi-stage compressed in order from a lower compression chamber to an upper motor section compression chamber. The rotary compressor according to claim 1.
し、２段目の圧縮空間を１段目の圧縮空間に対し小さく
したことを特徴とする特許請求の範囲第１項に記載のロ
ータリコンプレッサ。3. The compressor section according to claim 1, wherein two of the cylinders are arranged in series so that the compression space of the second stage is smaller than the compression space of the first stage. The described rotary compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60168055A JPH0730743B2 (en) | 1985-07-30 | 1985-07-30 | Rotary compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60168055A JPH0730743B2 (en) | 1985-07-30 | 1985-07-30 | Rotary compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6229787A JPS6229787A (en) | 1987-02-07 |
| JPH0730743B2 true JPH0730743B2 (en) | 1995-04-10 |
Family
ID=15860992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60168055A Expired - Lifetime JPH0730743B2 (en) | 1985-07-30 | 1985-07-30 | Rotary compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730743B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01300081A (en) * | 1988-05-30 | 1989-12-04 | Matsushita Refrig Co Ltd | Compressor |
| JPH07318179A (en) * | 1994-05-26 | 1995-12-08 | Toshiba Corp | Sealed compressor, and freezer and air conditioner including the compressor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52137708A (en) * | 1976-05-13 | 1977-11-17 | Sanwa Seiki Mfg Co Ltd | Compressors |
| JPS5718492A (en) * | 1980-07-07 | 1982-01-30 | Mitsubishi Heavy Ind Ltd | Rotary compressor |
-
1985
- 1985-07-30 JP JP60168055A patent/JPH0730743B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6229787A (en) | 1987-02-07 |
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