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JP2004076721A - Reciprocating compressor - Google Patents

Reciprocating compressor Download PDF

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Publication number
JP2004076721A
JP2004076721A JP2003099047A JP2003099047A JP2004076721A JP 2004076721 A JP2004076721 A JP 2004076721A JP 2003099047 A JP2003099047 A JP 2003099047A JP 2003099047 A JP2003099047 A JP 2003099047A JP 2004076721 A JP2004076721 A JP 2004076721A
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JP
Japan
Prior art keywords
discharge
discharge valve
cylinder
reciprocating
reciprocating compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003099047A
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Japanese (ja)
Inventor
Byung-Jik Kim
キム　ビュン−ジク
Hyon-Sok Kim
キム　ヒョン−ソク
Dong-Han Kim
キム　ドン−ハン
Jin-Sung Park
パーク　ジン−スン
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LG Electronics Inc
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LG Electronics Inc
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Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of JP2004076721A publication Critical patent/JP2004076721A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/102—Adaptations or arrangements of distribution members the members being disc valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reciprocating compressor capable of improving compression performance by improving the structure of the end surfaces of a discharge valve for adjusting the discharge of gas and a cylinder to frictionally make contact with the discharge valve. <P>SOLUTION: This reciprocating compressor has a piston 142 reciprocating by the transmission of the driving force of a reciprocating motor 30; the cylinder 141 having an inclined discharge surface 141b at the end surface, the cylinder forming internal spaces P1 and P2 with the piston 142; and a discharge valve assembly having a discharge cover 171 to be engaged with one side of the cylinder 141, the discharge valve 172 arranged at the end of the cylinder 141 so as to be adjustable of the gas discharge to the compression spaces P1 and P2 and a valve spring for elastically energizing the discharge valve 172. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は往復動式圧縮機に関し、特に、ガスの吐出を調節する吐出バルブと該吐出バルブに摩擦接触されるシリンダの端面の構造を改善して圧縮性能を向上させた往復動式圧縮機に関する。
【０００２】
【従来の技術】
一般に、冷凍サイクル装置の主要構成部品である圧縮機は、蒸発器から流入する低温、低圧状態の冷媒ガスを圧縮し、高温、高圧状態で吐出する機器である。
圧縮機は、流体を圧縮する方式によって回転式圧縮機、往復動式圧縮機、スクロール圧縮機等に分類することができる。
【０００３】
特に、往復動式圧縮機は、ピストンが直線状に移動しながら流体を吸入、圧縮するものである。このような往復動式圧縮機は、更に、駆動モータの回転運動をピストンの往復運動に変換して流体を吸入圧縮する方式のものと、駆動モータが直線往復運動し、ピストンを往復運動させ、流体を吸入圧縮する方式のものとに大別できる。
【０００４】
図４は、従来の往復動式圧縮機を示す断面図であり、図５は、図４の往復動式圧縮機のガス吸入行程における吐出バルブ組立体の動作状態を示す部分断面図であり、図６は、図４の往復動式圧縮機のガス吐出行程における吐出バルブ組立体の動作状態を示す部分断面図である。
【０００５】
図示するように、従来の往復動式圧縮機は、ガス吸入管ＳＰとガス吐出管ＤＰとを有するケース１０と、ケース１０の内部に弾力的に配設されるフレームユニット２０と、フレームユニット２０に固定され、駆動力を発生させる往復動式モータ３０と、往復動式モータ３０の直線往復動力を利用してガスを吸入、圧縮及び吐出する圧縮ユニット４０と、圧縮ユニット４０を運動方向に付勢し、共振運動を誘導する共振スプリングユニット５０とで構成される。
【０００６】
フレームユニット２０は、圧縮ユニット４０を支持する前方フレーム２１と、前方フレーム２１に係合して往復動式モータ３０の前方側を支持する中間フレーム２２と、中間フレーム２２に係合されて往復動式モータ３０の後方側を支持する後方フレーム２３とから構成されている。
【０００７】
往復動式モータ３０は、中間フレーム２２と後方フレーム２３との間に配設される外側固定子３１と、外側固定子３１と所定間隔をおいて係合され、後方フレーム２３に嵌合される内側固定子３２と、外側固定子３１と内側固定子３２との間に配設されて直線往復運動する移動子と３３から成る。
【０００８】
圧縮ユニット４０は、前方フレーム２１に一体に形成されるシリンダ４１と、往復動式モータ３０の移動子３３に係合し、シリンダ４１の圧縮空間Ｐ１で往復運動するピストン４２と、ピストン４２の先端に装着されて、そのピストン４２の吸入流路Ｆを開閉し、ガスの吸入を制限する吸入バルブ４３と、シリンダ４１の吐出側に装着されて圧縮空間Ｐ１を開閉し、圧縮ガスの吐出を調節する吐出バルブ組立体７０とから成る。
【０００９】
吐出バルブ組立体７０は、さらにシリンダ４１の一側をカバーする吐出カバー７１と、吐出カバー７１の内部に挿入されてシリンダ４１の圧縮空間Ｐ１を開閉する吐出バルブ７２と、吐出カバー７１の内側に支持され、さらに吐出バルブ７２に係合して吐出バルブ７２の位置を設定しながら吐出バルブ７２を弾性的に付勢するバルブスプリング７３とから構成される。
【００１０】
このように構成された従来の往復動式圧縮機の作用を説明する。
往復動式モータ３０に電力が供給され、外側固定子３１と内側固定子３２との間にフラックス（ｆｌｕｘ）が形成されると、往復動式モータ３の移動子３３が共振スプリングユニット５０により弾力的に往復運動する。
【００１１】
これと共にピストン４２がシリンダ４１内で往復運動しながら、圧縮空間Ｐ１の体積を変化させ、ガスを圧縮空間Ｐ１に吸入、圧縮する。
ガスの圧力が所定圧力以上となってバルブスプリング７３の弾性力より大きくなると、吐出バルブ７２が移動し、圧縮ガスが圧縮空間Ｐ２に吐出される。この一連の過程が繰り返され、吐出バルブ７２の開閉によって吐出されたガスは、吐出カバー７１に形成されたガス吐出管ＤＰを経て外部に吐出される。
【００１２】
【発明が解決しようとする課題】
然しながら、従来技術には、図５に二点鎖線で示すように、長時間の動作の間に、圧縮空間Ｐ１、Ｐ２の圧力差によって吐出バルブ７２が変形し、その吐出バルブ７２とシリンダ４１との摩擦接触によって接触部分に摩耗が発生する問題がある。
【００１３】
吐出バルブが変形し、シリンダの端面が摩耗すると、吐出バルブ７２の性能が低下し、圧縮機の性能が低下する。
本発明は、このような従来の課題に鑑みてなされたもので、ガスの吐出を調節する吐出バルブと、その吐出バルブに摩擦接触するシリンダの端面の構造を改良し、圧縮性能を改善した往復動式圧縮機を提供することを目的とする。
【００１４】
【課題を解決するための手段】
このような目的を達成するため、本発明によれば、往復動式モータの駆動力が伝達されて往復運動するピストンと、ピストンが挿入されてピストンと共にその内部に圧縮空間を形成し、その縦断面に傾斜吐出面が形成されたシリンダと、前記シリンダの片方に係合する吐出カバー、前記圧縮空間のガス吐出を調節できるように前記シリンダの端部に配設された吐出バルブ、前記吐出バルブを弾力的に付勢するバルブスプリングからなるバルブ組立体とを具備する往復動式圧縮機が提供される。
【００１５】
【発明の実施の形態】
以下、添付図面を参照して、本発明の往復動式圧縮機より詳細に説明する。
図１は、本発明の往復動式圧縮機を示す縦断面図で、図２は、図１の往復動式圧縮機のガス吸入行程における吐出バルブ組立体の動作状態を示す部分断面図であり、図３は、図１の往復動式圧縮機のガス吐出行程における、吐出バルブ組立体の動作状態を示す部分断面図である。
【００１６】
図示するように、本発明の往復動式圧縮機は、ガス吸入管ＳＰとガス吐出管ＤＰとを有するケース１０と、ケース１０の内部に弾力的に配設されるフレームユニット２０と、フレームユニット２０に固定され駆動力を発生させる往復動式モータ３０と、往復動式モータ３０の直線往復動力を利用してガスを吸入、圧縮及び吐出する圧縮ユニット１４０と、圧縮ユニット１４０を運動方向に付勢し、共振運動を誘導する共振スプリングユニット５０とを具備している。
【００１７】
圧縮ユニット１４０は、前方フレーム２１に形成されるシリンダ１４１と、往復動式モータ３０の移動子３３に係合してシリンダ１４１の圧縮空間Ｐ１で往復運動するピストン１４２と、ピストン１４２の先端に装着されてピストン１４２の吸入流路Ｆを開閉しながらガスの吸入を調節する吸入バルブ１４３と、シリンダ１４１の吐出側に装着され圧縮空間Ｐ１、Ｐ２を開閉しながら圧縮ガスの吐出を調節する吐出バルブ組立体１７０とを具備している。
【００１８】
吐出バルブ組立体１７０は、所定の空間を有するように形成されてシリンダ１４１の一側をカバーする吐出カバー１７１と、吐出カバー１７１の内部に挿入されてシリンダ１４１の圧縮空間Ｐ１、Ｐ２を開閉する吐出バルブ１７２と、吐出カバー１７１の内側に支持されるとともに吐出バルブ１７２と係合して吐出バルブ１７２の位置を設定しながら吐出バルブ１７２を弾性的に付勢するバルブスプリング１７３とを具備している。
【００１９】
本発明の特徴としてシリンダ１４１の端面には、傾斜吐出面１４１ｂが形成される。すなわち、傾斜吐出面１４１ｂは、シリンダ１４１の内周面と隣接すると同時に圧縮空間Ｐ１に接するシリンダ吐出面１４１ａに形成される。
また、シリンダ１４１のシリンダ吐出面１４１ａに接する吐出バルブ１７２の背面には、所定の曲率で圧力支持面１７２ａが突出形成される。
【００２０】
圧力支持面１７２ａの外側は、シリンダ１４１の傾斜吐出面１４１ｂと接触するように構成される。
本発明では、吐出バルブ１７２の変形のない初期運転時に圧力支持面１７２ａの外側がシリンダ１４１との傾斜吐出面１４１ｂと線接触し、長時間の動作で吐出バルブ１７２が変形した場合にも、圧力支持面１７２ａの外側とシリンダ１４１の傾斜吐出面１４１ｂとが線接触するように構成される。
【００２１】
即ち、吐出バルブ１７２が変形しても吐出バルブ１７２とシリンダ１４１との端面が摩擦接触し、吐出バルブ１７２の背面が所定の曲率で形成されてシリンダ１４１の端面に吐出傾斜面１４１ｂが形成される。
【００２２】
このように構成された往復動式圧縮機の作用効果について説明する。
駆動力が伝えられてピストン１４２がシリンダ１４１の内部で往復運動しながら圧縮空間Ｐ１の体積を変化させ、ガスを圧縮空間Ｐ１に吸入、圧縮する間、ガスの圧力が所定圧力以上となってバルブスプリング１７３の弾性力より大きくなる瞬間、吐出バルブ１７２が移動する。
【００２３】
この時、シリンダ１４１の傾斜吐出面１４１ｂに線接触する吐出バルブ１７２の圧力支持面１７２ａが開かれ、この開いた隙間から圧縮ガスが圧縮空間Ｐ２に吐出される。
【００２４】
さらに、圧縮空間Ｐ２に吐出されたガスは、吐出カバー１７１を貫通して形成されたガス吐出管ＤＰを経て外部に吐出される。
そして、圧縮空間Ｐ１の圧縮されたガスが圧縮空間Ｐ２に移動し、圧縮空間Ｐ１の圧力が所定圧力以下になると、バルブスプリング１７３の弾性力によって、吐出バルブ１７２は元の状態に復帰して、またガスの吸入及び圧縮が行われ、この一連の過程が繰り返される。
【００２５】
本発明によると、シリンダ１４１の傾斜吐出面１４１ｂと、所定曲率で突出した吐出バルブ１７２の圧力支持面１７２ａとが線接触することにより、接触面積の減少による吸入騷音を低減することができる。
【００２６】
また、上記のように吸入、圧縮及び吐出過程が長時間にわたって反復的に行われるとき、摩擦による摩耗及び圧縮空間Ｐ１、Ｐ２の圧力差によって吐出バルブ１７２が変形することもあるが、こういった場合にも、吐出バルブ１７２圧力支持面１７２ａがシリンダ１４１傾斜吐出面１４１ｂに線接触状態を維持し、吐出バルブの開閉性能を保持することができる。
【００２７】
【発明の効果】
以上説明したように、本発明によれば、長時間の使用により吐出バルブが変形しても、吐出バルブの開閉性能を保持し、圧縮性能を向上することができるとともに、吐出バルブとシリンダとが線接触することによって吸入騷音を低減し得るという効果を奏する。
【図面の簡単な説明】
【図１】本発明の往復動式圧縮機を示す縦断面図である。
【図２】図１の往復動式圧縮機のガス吸入行程における、吐出バルブ組立体の動作状態を示す部分断面図である。
【図３】図１の往復動式圧縮機のガス吐出行程における、吐出バルブ組立体の動作状態を示す部分断面図である。
【図４】従来の往復動式圧縮機を示す断面図である。
【図５】図４の往復動式圧縮機のガス吸入行程における、吐出バルブ組立体の動作状態を示す部分断面図である。
【図６】図４の往復動式圧縮機のガス吐出行程における、吐出バルブ組立体の動作状態を示す部分断面図である。
【符号の説明】
３０…往復動式モータ
１４０…圧縮ユニット
１４１…シリンダ
１４１ａ…シリンダ吐出面
１４１ｂ…傾斜吐出面
１４２…ピストン
１７０…吐出バルブ組立体
１７１…吐出カバー
１７２…吐出バルブ
１７２ａ…圧力支持面
Ｐ１…圧縮空間
Ｐ２…圧縮空間[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reciprocating compressor, and more particularly, to a reciprocating compressor having improved compression performance by improving a structure of a discharge valve for adjusting gas discharge and an end face of a cylinder which is in frictional contact with the discharge valve. .
[0002]
[Prior art]
In general, a compressor, which is a main component of a refrigeration cycle apparatus, is a device that compresses a low-temperature, low-pressure refrigerant gas flowing from an evaporator and discharges the refrigerant gas at a high-temperature, high-pressure state.
Compressors can be classified into rotary compressors, reciprocating compressors, scroll compressors, and the like according to the method of compressing a fluid.
[0003]
In particular, the reciprocating compressor sucks and compresses fluid while the piston moves linearly. Such a reciprocating compressor further converts a rotational motion of a drive motor into a reciprocating motion of a piston to suck and compress a fluid, and a linear reciprocating motion of the drive motor to reciprocate the piston. Fluids can be roughly classified into those that suck and compress fluid.
[0004]
FIG. 4 is a sectional view showing a conventional reciprocating compressor, and FIG. 5 is a partial sectional view showing an operation state of a discharge valve assembly in a gas suction stroke of the reciprocating compressor of FIG. FIG. 6 is a partial sectional view showing an operation state of a discharge valve assembly in a gas discharge stroke of the reciprocating compressor of FIG.
[0005]
As shown in the drawing, a conventional reciprocating compressor includes a case 10 having a gas suction pipe SP and a gas discharge pipe DP, a frame unit 20 elastically disposed inside the case 10, and a frame unit 20. A reciprocating motor 30 for generating a driving force, a compression unit 40 for sucking, compressing and discharging gas using the linear reciprocating power of the reciprocating motor 30, and a compression unit 40 attached in the direction of movement. And a resonance spring unit 50 that induces a resonance motion.
[0006]
The frame unit 20 includes a front frame 21 that supports the compression unit 40, an intermediate frame 22 that engages with the front frame 21 and supports the front side of the reciprocating motor 30, and a reciprocating motion that engages with the intermediate frame 22. And a rear frame 23 that supports the rear side of the motor 30.
[0007]
The reciprocating motor 30 is engaged with the outer stator 31 disposed between the intermediate frame 22 and the rear frame 23 at a predetermined interval from the outer stator 31 and is fitted to the rear frame 23. It comprises an inner stator 32 and a movable member 33 disposed between the outer stator 31 and the inner stator 32 and reciprocating linearly.
[0008]
The compression unit 40 includes a cylinder 41 formed integrally with the front frame 21, a piston 42 that engages with the mover 33 of the reciprocating motor 30 and reciprocates in the compression space P1 of the cylinder 41, and a tip of the piston 42. And a suction valve 43 that opens and closes a suction flow path F of the piston 42 and restricts gas suction, and a compression space P1 that is mounted on the discharge side of the cylinder 41 and controls the discharge of compressed gas. Discharge valve assembly 70.
[0009]
The discharge valve assembly 70 further includes a discharge cover 71 that covers one side of the cylinder 41, a discharge valve 72 that is inserted into the discharge cover 71 to open and close the compression space P1 of the cylinder 41, and a discharge valve 71 inside the discharge cover 71. And a valve spring 73 that elastically urges the discharge valve 72 while setting the position of the discharge valve 72 by engaging with the discharge valve 72.
[0010]
The operation of the conventional reciprocating compressor configured as described above will be described.
When electric power is supplied to the reciprocating motor 30 and a flux is formed between the outer stator 31 and the inner stator 32, the movable member 33 of the reciprocating motor 3 is elastically moved by the resonance spring unit 50. Reciprocally move.
[0011]
At the same time, while the piston 42 reciprocates in the cylinder 41, the volume of the compression space P1 is changed, and gas is sucked into the compression space P1 and compressed.
When the pressure of the gas becomes higher than the predetermined pressure and becomes larger than the elastic force of the valve spring 73, the discharge valve 72 moves, and the compressed gas is discharged to the compression space P2. This series of processes is repeated, and the gas discharged by opening and closing the discharge valve 72 is discharged to the outside via the gas discharge pipe DP formed in the discharge cover 71.
[0012]
[Problems to be solved by the invention]
However, in the related art, as shown by a two-dot chain line in FIG. 5, the discharge valve 72 is deformed due to the pressure difference between the compression spaces P1 and P2 during a long operation, and the discharge valve 72 and the cylinder 41 are connected to each other. There is a problem that abrasion occurs in the contact portion due to the frictional contact of.
[0013]
When the discharge valve is deformed and the end face of the cylinder is worn, the performance of the discharge valve 72 is reduced, and the performance of the compressor is reduced.
SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and has a reciprocating valve having improved compression performance by improving a structure of a discharge valve for adjusting gas discharge and an end face of a cylinder in frictional contact with the discharge valve. It is an object to provide a dynamic compressor.
[0014]
[Means for Solving the Problems]
In order to achieve such an object, according to the present invention, a piston that reciprocates by transmitting the driving force of a reciprocating motor, a piston is inserted into the piston to form a compression space therein together with the piston, A cylinder having an inclined discharge surface formed on a surface thereof, a discharge cover engaged with one of the cylinders, a discharge valve disposed at an end of the cylinder so that gas discharge in the compression space can be adjusted, and the discharge valve And a valve assembly comprising a valve spring for resiliently biasing the compressor.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the reciprocating compressor of the present invention will be described in more detail with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view showing a reciprocating compressor of the present invention, and FIG. 2 is a partial sectional view showing an operation state of a discharge valve assembly in a gas suction stroke of the reciprocating compressor of FIG. FIG. 3 is a partial cross-sectional view showing an operation state of the discharge valve assembly during a gas discharge stroke of the reciprocating compressor of FIG.
[0016]
As shown in the figure, a reciprocating compressor of the present invention includes a case 10 having a gas suction pipe SP and a gas discharge pipe DP, a frame unit 20 elastically disposed inside the case 10, and a frame unit. A reciprocating motor 30 that is fixed to the motor 20 and generates a driving force, a compression unit 140 that sucks, compresses, and discharges gas using linear reciprocating power of the reciprocating motor 30, and attaches the compression unit 140 in the direction of movement. And a resonance spring unit 50 for energizing and inducing a resonance movement.
[0017]
The compression unit 140 includes a cylinder 141 formed in the front frame 21, a piston 142 that reciprocates in the compression space P <b> 1 of the cylinder 141 by engaging with the mover 33 of the reciprocating motor 30, and is mounted on the tip of the piston 142. A suction valve 143 that adjusts gas suction while opening and closing the suction passage F of the piston 142, and a discharge valve that is mounted on the discharge side of the cylinder 141 and controls discharge of compressed gas while opening and closing the compression spaces P1 and P2. And an assembly 170.
[0018]
The discharge valve assembly 170 is formed to have a predetermined space and covers one side of the cylinder 141, and is inserted into the discharge cover 171 to open and close the compression spaces P1 and P2 of the cylinder 141. The discharge valve 172 includes a discharge valve 172 and a valve spring 173 that is supported inside the discharge cover 171 and engages with the discharge valve 172 to elastically urge the discharge valve 172 while setting the position of the discharge valve 172. I have.
[0019]
As a feature of the present invention, an inclined discharge surface 141b is formed on the end surface of the cylinder 141. That is, the inclined discharge surface 141b is formed on the cylinder discharge surface 141a that is adjacent to the inner peripheral surface of the cylinder 141 and that is in contact with the compression space P1.
A pressure support surface 172a is formed at a predetermined curvature on the back surface of the discharge valve 172 in contact with the cylinder discharge surface 141a of the cylinder 141.
[0020]
The outside of the pressure support surface 172a is configured to contact the inclined discharge surface 141b of the cylinder 141.
According to the present invention, even when the discharge valve 172 is deformed by a long-time operation, the outside of the pressure support surface 172a comes into line contact with the inclined discharge surface 141b with the cylinder 141 during the initial operation without deformation of the discharge valve 172. The outside of the support surface 172a and the inclined discharge surface 141b of the cylinder 141 are in line contact.
[0021]
That is, even if the discharge valve 172 is deformed, the end surfaces of the discharge valve 172 and the cylinder 141 come into frictional contact, the back surface of the discharge valve 172 is formed with a predetermined curvature, and the discharge inclined surface 141b is formed on the end surface of the cylinder 141. .
[0022]
The operation and effect of the reciprocating compressor configured as described above will be described.
When the driving force is transmitted, the piston 142 changes the volume of the compression space P1 while reciprocating inside the cylinder 141, and while the gas is sucked into the compression space P1 and compressed, the pressure of the gas becomes equal to or higher than a predetermined pressure, and the valve is opened. At the moment when the elastic force becomes larger than the elastic force of the spring 173, the discharge valve 172 moves.
[0023]
At this time, the pressure support surface 172a of the discharge valve 172 that is in linear contact with the inclined discharge surface 141b of the cylinder 141 is opened, and compressed gas is discharged from the opened gap into the compression space P2.
[0024]
Further, the gas discharged into the compression space P2 is discharged to the outside through a gas discharge pipe DP formed through the discharge cover 171.
Then, when the compressed gas in the compression space P1 moves to the compression space P2 and the pressure in the compression space P1 becomes equal to or lower than a predetermined pressure, the discharge valve 172 returns to the original state by the elastic force of the valve spring 173, Gas suction and compression are performed, and this series of processes is repeated.
[0025]
According to the present invention, since the inclined discharge surface 141b of the cylinder 141 and the pressure support surface 172a of the discharge valve 172 projecting at a predetermined curvature are in line contact, suction noise due to a reduction in the contact area can be reduced.
[0026]
Further, when the suction, compression and discharge processes are repeatedly performed for a long time as described above, the discharge valve 172 may be deformed due to wear due to friction and a pressure difference between the compression spaces P1 and P2. Also in this case, the discharge valve 172 can maintain the pressure supporting surface 172a in line contact with the inclined discharge surface 141b of the cylinder 141, and can maintain the opening and closing performance of the discharge valve.
[0027]
【The invention's effect】
As described above, according to the present invention, even when the discharge valve is deformed due to long-term use, the opening and closing performance of the discharge valve can be maintained, the compression performance can be improved, and the discharge valve and the cylinder can be separated. The effect of reducing the suction noise due to the line contact is achieved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a reciprocating compressor of the present invention.
FIG. 2 is a partial sectional view showing an operation state of a discharge valve assembly in a gas suction stroke of the reciprocating compressor of FIG.
FIG. 3 is a partial sectional view showing an operation state of a discharge valve assembly in a gas discharge stroke of the reciprocating compressor of FIG.
FIG. 4 is a sectional view showing a conventional reciprocating compressor.
FIG. 5 is a partial cross-sectional view showing an operation state of a discharge valve assembly in a gas suction stroke of the reciprocating compressor of FIG.
FIG. 6 is a partial cross-sectional view showing an operation state of a discharge valve assembly during a gas discharge stroke of the reciprocating compressor of FIG.
[Explanation of symbols]
30 reciprocating motor 140 compression unit 141 cylinder 141a cylinder discharge surface 141b inclined discharge surface 142 piston 170 discharge valve assembly 171 discharge cover 172 discharge valve 172a pressure support surface P1 compression space P2 … Compression space

Claims (4)

往復動式モータの駆動力が伝達されて往復運動するピストンと、
前記ピストンと共にその内部に圧縮空間を形成する、かつその端面に傾斜吐出面が形成されたシリンダと、
前記シリンダの一方に係合する吐出カバー、前記圧縮空間のガス吐出を調節し得るように前記シリンダの端部に配設された吐出バルブ、前記吐出バルブを弾力的に付勢するバルブスプリングを具備する吐出バルブ組立体と、
を具備する往復動式圧縮機。A piston that reciprocates by transmitting the driving force of a reciprocating motor,
A cylinder having a compression space formed therein together with the piston, and having an inclined discharge surface formed on an end surface thereof;
A discharge cover engaged with one of the cylinders, a discharge valve disposed at an end of the cylinder so as to adjust gas discharge in the compression space, and a valve spring for elastically biasing the discharge valve. A discharge valve assembly,
Reciprocating compressor. 前記吐出バルブの背面は、前記傾斜吐出面と線接触するように配置されている請求項１記載の往復動式圧縮機。The reciprocating compressor according to claim 1, wherein a back surface of the discharge valve is arranged to be in line contact with the inclined discharge surface. 前記傾斜吐出面は、前記シリンダの内周面に隣接している請求項１記載の往復動式圧縮機。The reciprocating compressor according to claim 1, wherein the inclined discharge surface is adjacent to an inner peripheral surface of the cylinder. 前記吐出バルブの背面には、前記傾斜吐出面に接する圧力支持面が一定の曲率で突出している請求項１記載の往復動式圧縮機。The reciprocating compressor according to claim 1, wherein a pressure support surface in contact with the inclined discharge surface protrudes at a constant curvature from a back surface of the discharge valve.
JP2003099047A 2002-08-21 2003-04-02 Reciprocating compressor Pending JP2004076721A (en)

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