JP4566676B2 - air compressor - Google Patents

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JP4566676B2
JP4566676B2 JP2004286901A JP2004286901A JP4566676B2 JP 4566676 B2 JP4566676 B2 JP 4566676B2 JP 2004286901 A JP2004286901 A JP 2004286901A JP 2004286901 A JP2004286901 A JP 2004286901A JP 4566676 B2 JP4566676 B2 JP 4566676B2
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discharge
valve
holes
discharge port
closes
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JP2006097637A (en
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伊藤　　勉
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Ltd
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Priority to JP2004286901A priority Critical patent/JP4566676B2/en
Priority to US11/235,224 priority patent/US20060067841A1/en
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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
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1066—Valve plates

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Details Of Reciprocating Pumps (AREA)

Description

本発明は、動力により空気を吐出する空気圧縮機に関する。 The present invention relates to an air compressor which discharges air by the power.

流体機械は、動力により流体を吐出する機械であり、たとえば、その一種である往復動型空気圧縮機は、クランク軸が回転可能に設けられたクランクケースと、このクランクケースに連結されたシリンダと、このシリンダ内に往復動可能に挿嵌されたピストンと、このピストンとクランク軸との間に設けられてクランク軸の回転でピストンを往復動させる連接棒と、シリンダに連結されシリンダとピストンとで圧縮室を画成するとともに圧縮室に空気を吸い込む吸込口、吸込口を開閉させる吸込弁、圧縮室から空気を吐出させる吐出口および吐出口を開閉させる吐出弁が設けられたシリンダヘッドとを備えている。   A fluid machine is a machine that discharges fluid by power. For example, a reciprocating air compressor that is a type of a fluid machine includes a crankcase in which a crankshaft is rotatably provided, and a cylinder connected to the crankcase. A piston inserted in the cylinder so as to be able to reciprocate, a connecting rod provided between the piston and the crankshaft to reciprocate the piston by rotation of the crankshaft, a cylinder connected to the cylinder, and the piston And a cylinder head provided with a suction port for sucking air into the compression chamber, a suction valve for opening and closing the suction port, a discharge port for discharging air from the compression chamber, and a discharge valve for opening and closing the discharge port. I have.

このような往復動型空気圧縮機では、圧縮された空気が圧縮室から吐出される際に生じる騒音が問題となることがあるが、この騒音は圧縮空気が吐出口を通る際に生じるものである。このため、吐出口とエアタンクとを連通させる吐出路に吸音材を配置することで騒音防止を図ったものがある（例えば特許文献１参照）。
実開平５−１２６７５号公報 In such a reciprocating type air compressor, noise generated when compressed air is discharged from the compression chamber may be a problem. This noise is generated when compressed air passes through the discharge port. is there. For this reason, there is one that aims to prevent noise by disposing a sound absorbing material in a discharge path that allows the discharge port and the air tank to communicate with each other (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 5-12675

上記のように吐出路に吸音材を配置するのでは、吐出口から吐出された圧縮空気が吐出路を通る際の騒音とタンク内での共鳴音とを減少させる効果は得られるものの、吐出口から吐出される際に生じる騒音そのものを減少させることはできないという問題があった。   Although the sound absorbing material is arranged in the discharge passage as described above, although the effect of reducing the noise when the compressed air discharged from the discharge passage passes through the discharge passage and the resonance sound in the tank can be obtained, the discharge opening There was a problem that the noise itself generated when discharged from the nozzle cannot be reduced.

ところで、吐出口の大きさを変更することで音の大きさを変化させることができ、例えば吐出口を大きくすると音は大きくなる一方、吐出口を小さくすれば音は小さくなる。しかし、音を小さくするために吐出口を小さくすると、吐出口を通過する圧縮空気の流速が速くなってこの吐出口を開閉させる吐出弁に大きな衝撃を集中的に与え、その寿命を短くしてしまう可能性があった。   By the way, the volume of the sound can be changed by changing the size of the discharge port. For example, when the discharge port is made larger, the sound becomes louder, and when the discharge port is made smaller, the sound becomes louder. However, if the discharge port is made smaller in order to reduce the sound, the flow rate of compressed air passing through the discharge port is increased, and a large impact is concentrated on the discharge valve that opens and closes the discharge port, shortening its life. There was a possibility.

したがって、本発明は、圧縮空気が吐出口を通る際の騒音を低減でき、しかも吐出弁の寿命が短くなることを防止できる空気圧縮機の提供を目的とする。 Accordingly, the present invention is, compressed air can be reduced noise when passing through the discharge port, moreover the life of the discharge valve for the purpose of providing the air compressor which can prevent the shortened.

上記目的を達成するために、請求項１に係る発明は、シリンダ内を往復動するピストンと、前記シリンダの一端を閉塞するシリンダヘッドに形成された吸込口を開閉する吸込弁と、前記シリンダヘッドに形成された吐出口を開閉する吐出弁とを有する往復動型空気圧縮機において、前記吐出弁は、合成樹脂製でシール面が円形の弁体と、該弁体の周囲に設けられ前記弁体を閉弁方向に付勢するスプリングとからなり、前記吐出口が三つ以上の円形の孔からなり、前記三つ以上の孔が前記シール面の中心を中心として均等に配置されることを特徴としている。 In order to achieve the above object, an invention according to claim 1 includes a piston that reciprocates in a cylinder, a suction valve that opens and closes a suction port formed in a cylinder head that closes one end of the cylinder, and the cylinder head. In the reciprocating air compressor having a discharge valve that opens and closes a discharge port formed in the valve, the discharge valve is made of a synthetic resin and has a circular sealing surface, and the valve is provided around the valve body. A spring for urging the body in the valve closing direction, the discharge port is formed of three or more circular holes, and the three or more holes are equally arranged around the center of the seal surface. It is a feature.

請求項１に係る発明によれば、吐出口が複数の孔からなっているため、圧縮空気が各孔を通る際の騒音を低減するために各孔を小さくしても、孔が複数あることによって各孔を通過する圧縮空気の流速を抑えることができ、その結果、圧縮空気が吐出口を開閉する吐出弁に与える衝撃を小さくできる。しかも複数の孔に分けることで圧縮空気が吐出弁に与える衝撃を分散させることができる。したがって、圧縮空気が吐出口を通る際の騒音を低減でき、しかも吐出弁の寿命が短くなることを防止できる。 According to the invention of claim 1, since the discharge port is composed of a plurality of holes, even by reducing the respective holes for compressed air to reduce the noise generated when passing through each hole, there are multiple holes it is possible to suppress the flow rate of the compressed air passing through each hole by, as a result, it is possible to reduce the impact on the discharge valve compressed air to open and close the discharge port. Moreover compressed air can be dispersed impact on the discharge valve by dividing a plurality of holes. Accordingly, compressed air can be reduced noise when passing through the discharge ports, yet can prevent the life of the discharge valve is shortened.

また、吐出口を三つ以上の孔とすることで、例えば吐出弁が円形状のシール面を有している場合に、このシール面に対し各孔を面積的にバランス良く配置することができる。したがって、仮に各孔を通過した圧縮空気が吐出弁に衝撃を与えたとしても吐出弁はバランス良く衝撃を受けることになり、偏って衝撃を受ける場合と比較して寿命をさらに延ばすことができる。
また、吐出弁が円形のシール面を有し、前記三つ以上の孔が前記シール面に対しその中で円周方向に均等に配置されるようにすることで、円形のシール面に対し各孔を面積的にバランス良く配置することができる。したがって、仮に各孔を通過した圧縮空気が吐出弁に衝撃を与えたとしても吐出弁はバランス良く衝撃を受けることになり、偏って衝撃を受ける場合と比較して寿命をさらに延ばすことができる。 Moreover, by making the discharge port into three or more holes, for example, when the discharge valve has a circular seal surface, each hole can be arranged with a good area balance with respect to this seal surface. . Thus, even the discharge valve will receive a balanced impact as if compressed air having passed through the respective holes shocked the discharge valve, it is possible to further prolong the service life as compared with the case shocked biased .
Further, the discharge valve has a circular sealing surface, and the three or more holes are arranged uniformly in the circumferential direction in the sealing surface, so that each of the circular sealing surfaces The holes can be arranged in a well-balanced area. Thus, even the discharge valve will receive a balanced impact as if compressed air having passed through the respective holes shocked the discharge valve, it is possible to further prolong the service life as compared with the case shocked biased .

本発明の一実施形態の空気圧縮機を図面を参照して以下に説明する。
本実施形態の空気圧縮機２０は、例えば自動車等の車両に搭載されるエアサスペンションシステムに用いられてエアサスペンションに圧縮空気を供給するもので、その下部においてモータケース２１とクランクケース２２とが連結されており、モータケース２１内には出力軸２３をクランクケース２２側に突出させるようにモータ２４が収納されている。 An air compressor according to an embodiment of the present invention will be described below with reference to the drawings.
The air compressor 20 of the present embodiment is used in an air suspension system mounted on a vehicle such as an automobile, for example, and supplies compressed air to the air suspension. A motor case 21 and a crankcase 22 are connected to each other below the air compressor 20. The motor 24 is housed in the motor case 21 so that the output shaft 23 protrudes toward the crankcase 22.

モータ２４の出力軸２３は、中間部がベアリング２６を介してクランクケース２２に回転可能に支持されており、クランクケース２２内に突出するその先端部には軸直交方向に延出するクランク部材２７が固定されている。このクランク部材２７にはモータ２４の出力軸２３と平行にクランクピン２８が支持されている。これにより、モータ２４の出力軸２３が回転するとクランク部材２７を介してクランクピン２８が出力軸２３を中心に旋回することになる。その結果、これら出力軸２３、クランク部材２７およびクランクピン２８がクランク軸２９を構成することになり、このクランク軸２９がクランクケース２２に回転可能に設けられている。   The output shaft 23 of the motor 24 is rotatably supported by the crankcase 22 at an intermediate portion via a bearing 26, and a crank member 27 extending in the direction perpendicular to the axis is projected at a tip portion protruding into the crankcase 22. Is fixed. A crank pin 28 is supported on the crank member 27 in parallel with the output shaft 23 of the motor 24. Thereby, when the output shaft 23 of the motor 24 rotates, the crank pin 28 turns around the output shaft 23 via the crank member 27. As a result, the output shaft 23, the crank member 27, and the crank pin 28 constitute a crankshaft 29, and the crankshaft 29 is rotatably provided on the crankcase 22.

クランクケース２２には、シリンダ３１が上側に搭載された状態で連結されており、シリンダ３１の内側には、ピストン３２が往復動可能に挿嵌されている。このピストン３２にはピストンピン３３を介して連接棒３４の一端側が回転可能に連結されており、この連接棒３４の他端側はベアリング３５を介してクランク軸２９のクランクピン２８に回転可能に連結されている。これにより、モータ２４の回転でクランクピン２８が旋回すると連接棒３４を介してピストン３２がシリンダ３１内で往復動する。つまり、ピストン３２とクランク軸２９との間に設けられた連接棒３４は、クランク軸２９の回転でピストン３２を往復動させる。   A cylinder 31 is connected to the crankcase 22 in a state of being mounted on the upper side, and a piston 32 is inserted inside the cylinder 31 so as to be able to reciprocate. One end side of a connecting rod 34 is rotatably connected to the piston 32 via a piston pin 33, and the other end side of the connecting rod 34 is rotatable to a crank pin 28 of a crankshaft 29 via a bearing 35. It is connected. As a result, when the crank pin 28 turns by the rotation of the motor 24, the piston 32 reciprocates in the cylinder 31 via the connecting rod 34. That is, the connecting rod 34 provided between the piston 32 and the crankshaft 29 reciprocates the piston 32 by the rotation of the crankshaft 29.

シリンダ３１には、シリンダヘッド３７が上側に搭載された状態で連結されており、このシリンダヘッド３７はシリンダ３１とピストン３２とで圧縮室３８を画成する。シリンダヘッド３７には、一端側が機外に臨む外気取入口４０とされ他端側が圧縮室３８に開口してこの圧縮室３８に空気を吸い込む吸込口４１とされた吸込通路４２と、一端側が空気から水分を取り除くエアドライヤ４３に接続される接続口４４とされ、他端側が圧縮室３８に開口してこの圧縮室３８から空気を吐出させる吐出口４５とされた吐出通路４６とが形成されている。   A cylinder head 37 is connected to the cylinder 31 with the cylinder head 37 mounted on the upper side, and the cylinder head 37 defines a compression chamber 38 by the cylinder 31 and the piston 32. The cylinder head 37 has an intake passage 42, one end side of which is an outside air intake port 40 facing the outside of the machine, the other end side is opened to the compression chamber 38, and an intake port 41 for sucking air into the compression chamber 38. The discharge port 46 is formed as a connection port 44 connected to an air dryer 43 that removes moisture from the other end, and the other end side opens into the compression chamber 38 and serves as a discharge port 45 that discharges air from the compression chamber 38. .

吸込通路４２には、吸込口４１を開閉させる吸込弁４８が設けられており、吸込弁４８は外気取入口４０側から吸込口４１側への空気の流れのみを許容するように開閉する。この吸込弁４８は、吸込口４１を開閉させる弁体４９と、弁体４９を吸込口４１を閉塞する方向に付勢するスプリング５０とを有しており、圧縮室３８の圧力が外気圧よりスプリング５０の付勢力分を越えて低くなると弁体４９が移動して吸込口４１を開く。   The suction passage 42 is provided with a suction valve 48 that opens and closes the suction port 41, and the suction valve 48 opens and closes only to allow air flow from the outside air intake 40 side to the suction port 41 side. The suction valve 48 includes a valve body 49 that opens and closes the suction port 41 and a spring 50 that urges the valve body 49 in a direction to close the suction port 41, and the pressure in the compression chamber 38 is greater than the external pressure. When it becomes lower than the urging force of the spring 50, the valve body 49 moves to open the suction port 41.

吐出通路４６には、吐出口４５を開閉させる吐出弁５２が設けられており、吐出弁５２は吐出口４５側から接続口４４側への空気の流れのみを許容するように開閉する。この吐出弁５２は、吐出口４５を開閉させる合成樹脂製の弁体５３と、弁体５３を吐出口４５を閉塞する方向に付勢するスプリング５４とを有しており、圧縮室３８の圧力が接続口４４側の圧力よりもスプリング５４の付勢力分を越えて高くなると弁体５３が移動して吐出口４５を開く。   The discharge passage 46 is provided with a discharge valve 52 that opens and closes the discharge port 45. The discharge valve 52 opens and closes only to allow air flow from the discharge port 45 side to the connection port 44 side. The discharge valve 52 includes a synthetic resin valve body 53 that opens and closes the discharge port 45 and a spring 54 that urges the valve body 53 in a direction to close the discharge port 45. Becomes higher than the pressure on the connection port 44 side beyond the biasing force of the spring 54, the valve body 53 moves to open the discharge port 45.

エアドライヤ４３は、上記した接続口４４に接続される通気口５６と圧縮空気の供給先へ通じる通気口５７とを有するドライヤケース５８を備えており、ドライヤケース５８には、通気口５６側に通気性のある仕切板６０が、通気口５７側にも通気性のある仕切板６１がそれぞれ嵌装されており、これら仕切板６０と仕切板６１とによって画成される吸着室６２内に、球状のシリカゲル（水分吸着剤）６３が多数充填されている。また、仕切板６１とドライヤケース５８との間には仕切板６１を仕切板６０の方向に押圧するスプリング６４が介装されており、仕切板６１が押圧されることで、仕切板６０と仕切板６１との間の吸着室６２内はシリカゲル６３が密に充填された状態となっている。   The air dryer 43 includes a dryer case 58 having a vent 56 connected to the connection port 44 and a vent 57 connected to a compressed air supply destination. The dryer case 58 has a vent on the vent 56 side. A partition plate 60 having a permeable property is fitted with a partition plate 61 having a breathability on the side of the vent 57, and a spherical shape is formed in the suction chamber 62 defined by the partition plate 60 and the partition plate 61. A large number of silica gels (water adsorbents) 63 are packed. In addition, a spring 64 that presses the partition plate 61 in the direction of the partition plate 60 is interposed between the partition plate 61 and the dryer case 58. When the partition plate 61 is pressed, the partition plate 60 and the partition case 58 are partitioned. The inside of the adsorption chamber 62 between the plate 61 is in a state where the silica gel 63 is closely packed.

そして、本実施形態においては、図２および図３に示すように、吐出通路４６の吐出口４５が複数具体的には七つの同径の孔６７からなっている。ここで、これらの孔６７を一度に開閉させる弁体５３は、孔６７の圧縮室３８とは反対側が開口する平坦な弁座面６８に当接してこれら孔６７を閉塞させるシール面７０が平坦な円形状をなしており、複数の孔６７は、弁座面６８に当接した状態のシール面７０に対しその中で円周方向に均等に配置されるように形成されている。   In the present embodiment, as shown in FIGS. 2 and 3, the discharge port 45 of the discharge passage 46 includes a plurality of, specifically, seven holes 67 having the same diameter. Here, the valve body 53 that opens and closes these holes 67 at a time is in contact with a flat valve seat surface 68 that opens on the opposite side of the hole 67 from the compression chamber 38, and the sealing surface 70 that closes these holes 67 is flat. The plurality of holes 67 are formed so as to be evenly arranged in the circumferential direction with respect to the seal surface 70 in contact with the valve seat surface 68.

具体的には、一つの孔６７がシール面７０の中心位置に設けられ、残り六つの孔６７がシール面７０の中心に対しすべて同じ半径位置でしかも円周を等間隔に分けるように６０度おきに設けられている。このようにして、七つの孔６７がシール面７０の中心を中心として均等に配置されているため、シール面７０に対し各孔６７を孔６７の部分と孔６７のない部分とで面積的に偏りがない。なお、このようにシール面７０に対し孔６７の部分と孔６７のない部分とで面積的に偏りがないようにバランス良く配置するためには、孔６７の数を三つ以上とするのが好ましい。   Specifically, one hole 67 is provided at the center position of the seal surface 70, and the remaining six holes 67 are all at the same radial position with respect to the center of the seal surface 70 and the circumference is equally spaced by 60 degrees. It is provided every other. In this way, since the seven holes 67 are evenly arranged with the center of the seal surface 70 as the center, each hole 67 is divided into the hole 67 portion and the portion without the hole 67 with respect to the seal surface 70 in terms of area. There is no bias. In addition, in order to arrange in a balanced manner so that there is no deviation in area between the portion of the hole 67 and the portion without the hole 67 with respect to the seal surface 70 as described above, the number of the holes 67 should be three or more. preferable.

このような構成の空気圧縮機２０のモータ２４を起動すると、モータ２４の出力軸２３が回転し、クランク部材２７を介してクランクピン２８が旋回する。すると、連接棒３４を介してピストン３２がシリンダ３１内で往復動して圧縮室３８の容積を増減させることになり、圧縮室３８の容積を増大させる際に吸込弁４８を開いて吸込通路４２を介して外気を圧縮室３８に導入し、圧縮室３８の容積を減少させる際に空気を圧縮しその圧力で吐出弁５２を開いて吐出口４５の複数の孔６７から吐出通路４６を介して圧縮空気を吐出させる。 When the motor 24 of the air compressor 20 having such a configuration is started, the output shaft 23 of the motor 24 rotates, and the crank pin 28 turns via the crank member 27. Then, the piston 32 reciprocates in the cylinder 31 via the connecting rod 34 to increase or decrease the volume of the compression chamber 38. When the volume of the compression chamber 38 is increased, the suction valve 48 is opened to open the suction passage 42. When the outside air is introduced into the compression chamber 38 through the air and the volume of the compression chamber 38 is reduced, the air is compressed, and the discharge valve 52 is opened by the pressure to open the discharge valve 45 from the plurality of holes 67 through the discharge passage 46. Compressed air is discharged.

ここで、各孔６７は径が小さくされており、その結果、圧縮空気が各孔６７を通る際の騒音が低減されて静粛性に優れることになる。また、このように各孔６７を小さくしても、孔６７が複数であることによって各孔６７を通過する圧縮空気の流速を抑えることができ、その結果、圧縮空気が各孔６７を開閉する吐出弁５２の合成樹脂製の弁体５３に与える衝撃を小さくできる。しかも複数の孔６７に分けることで圧縮空気が弁体５３に与える衝撃を分散させることができる。したがって、圧縮空気が吐出口４５を通る際の騒音を低減でき、しかも吐出弁５２の弁体４９の寿命が短くなることを防止できる。   Here, the diameter of each hole 67 is reduced, and as a result, the noise when compressed air passes through each hole 67 is reduced and the silence is excellent. Moreover, even if each hole 67 is made small in this way, the flow rate of the compressed air passing through each hole 67 can be suppressed due to the plurality of holes 67. As a result, the compressed air opens and closes each hole 67. The impact given to the synthetic resin valve body 53 of the discharge valve 52 can be reduced. Moreover, the impact that the compressed air gives to the valve body 53 can be dispersed by dividing it into the plurality of holes 67. Therefore, noise when compressed air passes through the discharge port 45 can be reduced, and the life of the valve body 49 of the discharge valve 52 can be prevented from being shortened.

そして、上記のように吐出された圧縮空気はエアドライヤ４３のドライヤケース５８に通気口５６から導入され、仕切板６０を通って、吸着室６２を通り、その際に吸着室６２のシリカゲル６３に水分が吸着されることで除去され、その後、仕切板６１を通って、通気口５７から吐出される。   The compressed air discharged as described above is introduced from the vent 56 into the dryer case 58 of the air dryer 43, passes through the partition plate 60, passes through the adsorption chamber 62, and in that case, the silica gel 63 in the adsorption chamber 62 receives moisture. Is removed by being adsorbed, and then discharged from the vent 57 through the partition plate 61.

ここで、吐出口４５を複数の孔６７とする場合に、上記したように、３つ以上の孔６７とすることで、吐出弁５２が円形状のシール面７０を有している場合に、このシール面７０に対し各孔６７を面積的にバランス良く配置することができる。したがって、仮に各孔６７を通過した圧縮空気が吐出弁５２に衝撃を与えたとしても吐出弁５２はバランス良く衝撃を受けることになり、偏って衝撃を受ける場合と比較して寿命をさらに延ばすことができる。   Here, when the discharge port 45 has a plurality of holes 67, as described above, the discharge valve 52 has the circular seal surface 70 by having three or more holes 67. The holes 67 can be arranged with a good area balance with respect to the seal surface 70. Therefore, even if the compressed air that has passed through each hole 67 gives an impact to the discharge valve 52, the discharge valve 52 receives an impact in a well-balanced manner, and further extends the life compared to the case where the impact is applied unevenly. Can do.

なお、吐出口４５を構成する複数の孔６７を別体の焼結部品に焼結時に形成し、この焼結部品をシリンダヘッド３７の取付穴に取り付けるようにすることも可能である。このようにすれば複数の孔６７を容易に形成することができる。 It is also possible to form a plurality of holes 67 constituting the discharge port 45 in a separate sintered part during sintering and attach the sintered part to the mounting hole of the cylinder head 37. In this way, the plurality of holes 67 can be easily formed .

本発明の一実施形態の空気圧縮機を示す断面図である。It is sectional drawing which shows the air compressor of one Embodiment of this invention. 本発明の一実施形態の空気圧縮機の要部を示す部分拡大断面図である。It is a partial expanded sectional view which shows the principal part of the air compressor of one Embodiment of this invention. 本発明の一実施形態の空気圧縮機の吐出口を示す平面図である。It is a top view which shows the discharge outlet of the air compressor of one Embodiment of this invention.

符号の説明Explanation of symbols

２０ 空気圧縮機
４５ 吐出口
５２ 吐出弁
６７ 孔
７０ シール面 20 Air compressor 45 Discharge port 52 Discharge valve 67 Hole 70 Seal surface

Claims (1)

シリンダ内を往復動するピストンと、前記シリンダの一端を閉塞するシリンダヘッドに形成された吸込口を開閉する吸込弁と、前記シリンダヘッドに形成された吐出口を開閉する吐出弁とを有する往復動型空気圧縮機において、Reciprocating motion having a piston that reciprocates in a cylinder, a suction valve that opens and closes a suction port formed in a cylinder head that closes one end of the cylinder, and a discharge valve that opens and closes a discharge port formed in the cylinder head Type air compressor,
前記吐出弁は、合成樹脂製でシール面が円形の弁体と、該弁体の周囲に設けられ前記弁体を閉弁方向に付勢するスプリングとからなり、前記吐出口が三つ以上の円形の孔からなり、前記三つ以上の孔が前記シール面の中心を中心として均等に配置されることを特徴とする空気圧縮機。The discharge valve is made of a synthetic resin valve body having a circular seal surface and a spring provided around the valve body to urge the valve body in a valve closing direction, and the discharge port has three or more discharge ports. An air compressor comprising circular holes, wherein the three or more holes are evenly arranged around the center of the sealing surface.
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