JP3070980U - Oil backflow prevention device for vacuum pump - Google Patents

Oil backflow prevention device for vacuum pump

Info

Publication number
JP3070980U
JP3070980U JP2000000671U JP2000000671U JP3070980U JP 3070980 U JP3070980 U JP 3070980U JP 2000000671 U JP2000000671 U JP 2000000671U JP 2000000671 U JP2000000671 U JP 2000000671U JP 3070980 U JP3070980 U JP 3070980U
Authority
JP
Japan
Prior art keywords
intake
pump chamber
vacuum pump
check valve
valve
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.)
Expired - Fee Related
Application number
JP2000000671U
Other languages
Japanese (ja)
Inventor
憲一 古平
博 山口
Original Assignee
有限会社ロテックス
株式会社山口製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 有限会社ロテックス, 株式会社山口製作所 filed Critical 有限会社ロテックス
Priority to JP2000000671U priority Critical patent/JP3070980U/en
Application granted granted Critical
Publication of JP3070980U publication Critical patent/JP3070980U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

(57)【要約】 【課題】各真空ポンプ個有の到達真空度及び排気速度を
損なわないで、真空ポンプ内のオイルの逆流を防止する
と共に、真空ポンプのモータの電源の故障等で回転子が
停止した際、吸気用逆止弁を自動的に閉じるようにす
る。 【解決手段】ポンプ室に通ずる吸気通路に吸気用逆止弁
を介して吸入口を設け、その逆止弁とポンプ室との間の
吸気通路にポンプ室内の回転子と電気的に連動する電磁
弁の出口を接続する。
(57) [Summary] [PROBLEMS] To prevent backflow of oil in a vacuum pump without impairing the ultimate vacuum degree and evacuation speed of each vacuum pump, and to prevent a rotor of a vacuum pump motor from power failure or the like. Automatically shuts off the check valve for intake. An intake passage is provided in an intake passage leading to a pump chamber via a check valve for intake, and an electromagnetic passage electrically connected to a rotor in the pump chamber is provided in an intake passage between the check valve and the pump chamber. Connect the outlet of the valve.

Description

【考案の詳細な説明】[Detailed description of the invention]
【0001】[0001]
【考案の属する技術分野】[Technical field to which the invention belongs]
この考案は、HFC系の合成オイルを冷媒として使用している空調機、カーエ アコン、冷蔵庫、冷凍機を新規に取付けたり、後付けしたり、或いは修理する際 、それらの機械の配管内を真空乾燥するときに用いる鉱物オイル入り真空ポンプ のオイル逆流防止装置に関するものである。 The idea is that when installing, retrofitting, or repairing air conditioners, car air conditioners, refrigerators, and refrigerators that use HFC-based synthetic oil as a refrigerant, vacuum-dry the piping of those machines. The present invention relates to an oil backflow prevention device for a vacuum pump containing mineral oil which is used when performing the operation.
【0002】[0002]
【従来の技術】[Prior art]
従来の電磁弁を利用した真空ポンプ中の鉱物オイルの逆流防止機は、その真空 ポンプの吸入口に直接接続する為、構造はシンプルであるが、吸入空気の流量抵 抗が大きく真空ポンプの排気能力が約20〜30%ほど低下する。 The backflow prevention device for mineral oil in a vacuum pump using a conventional solenoid valve has a simple structure because it is directly connected to the suction port of the vacuum pump, but the flow resistance of the intake air is large and the vacuum pump exhausts. Performance is reduced by about 20-30%.
【0003】 その多くは、3方向電磁弁であって、それはモーターへの供給電源が止まると 、電磁弁のIN側が閉り、OUT側に大気が入りオイルの逆流を防止するもので あるが、この3方向電磁弁を取付た場合は、本来その真空ポンプが有している到 達真空度に比較してそれが悪くなる。また一部のもので、2方向電磁弁を、使用 しているものがあるが、長時間放置するとリークによりオイルが流失し、又吸入 口からポンプ室まで、真空ポンプオイルが充満し、真空ポンプの再始動時オイル 排出する為モーターに多大な負荷がかかるだけで無く損焼する事さえある。[0003] Most of them are three-way solenoid valves. When the power supply to the motor is stopped, the IN side of the solenoid valve closes and the atmosphere enters into the OUT side to prevent a backflow of oil. When this three-way solenoid valve is mounted, it becomes worse than the ultimate vacuum that the vacuum pump originally has. Some of them use a two-way solenoid valve, but if left for a long period of time, oil will be lost due to leaks, and the vacuum pump oil will be filled from the suction port to the pump chamber. When the oil is restarted, the oil is drained, which not only imposes a heavy load on the motor but also burns out.
【0004】[0004]
【考案が解決しようとする課題】[Problems to be solved by the invention]
真空ポンプの本来持っている到達真空度、排気速度を損なわず、真空ポンプオ イルの逆流防止をすることで、前記空調機等の新規取付及び修理に要する作業時 間の短縮を可能にするものである。 By preventing backflow of the vacuum pump oil without impairing the ultimate vacuum degree and evacuation speed inherent to the vacuum pump, it is possible to shorten the time required for new installation and repair of the air conditioner etc. is there.
【0005】 又供給電源以外の故障、例えばモーター自体の故障、真空ポンプヘッド側等の 故障の場合でも逆止弁が働き、真空ポンプ内の鉱物オイルが前記空調機等の合成 オイルに混入することを防ぐことが可能となる機器を提供するものである。[0005] In addition, even in the case of a failure other than the power supply, for example, a failure of the motor itself or a failure of the vacuum pump head, the check valve operates, and the mineral oil in the vacuum pump mixes with the synthetic oil of the air conditioner or the like. It is intended to provide a device capable of preventing the problem.
【0006】[0006]
【課題を解決するための手段】[Means for Solving the Problems]
この考案の真空ポンプのオイル逆流防止装置は、ポンプ室に通ずる吸気通路に 吸気用逆止弁を介して吸入口を設け、その逆止弁とポンプ室との間における吸気 通路に空気導入口を設け、該空気導入口に外気と通ずる電磁弁の出口を接続し、 前記ポンプ室内の真空回転子の電源と電磁弁の電源とを連動可能に結合するもの である。 The oil backflow prevention device of the vacuum pump of the present invention is provided with an intake port via an intake check valve in the intake passage leading to the pump chamber, and an air inlet port in the intake passage between the check valve and the pump chamber. And an outlet of a solenoid valve communicating with the outside air is connected to the air inlet, and a power supply of the vacuum rotor in the pump chamber and a power supply of the solenoid valve are operably connected to each other.
【0007】[0007]
【考案の実施の形態】[Embodiment of the invention]
この考案の鉱物オイル入り真空ポンプの実施の形態は図1に示す如く、吸気通 路1の一端に吸入口2を形成し、他端にポンプ室3を連通し、該吸気通路1にお ける吸気口2の内側に吸気用逆止弁4を設け、その逆止弁4とポンプ室3との間 の吸気通路1に空気導入口5を形成し、該空気導入口5に大気と通ずる電磁弁6 の出口7を連通し、前記ポンプ室3内の回転子8と電磁弁6の図示してない電源 を連動可能に結合するものである。 As shown in FIG. 1, in the embodiment of the vacuum pump containing mineral oil of the present invention, a suction port 2 is formed at one end of an intake passage 1 and a pump chamber 3 is communicated with the other end. An intake check valve 4 is provided inside the intake port 2, an air inlet 5 is formed in the intake passage 1 between the check valve 4 and the pump chamber 3, and the air inlet 5 communicates with the atmosphere. The outlet 7 of the valve 6 communicates with the rotor 8 in the pump chamber 3 and the power supply (not shown) of the solenoid valve 6 is operably connected.
【0008】 前述の回転子8内に一対のスライダ9、10を摺動自在に設け、両スライダ9 、10をそれらの間に介入したばね11で、ポンプ室3の内壁面12に常時圧着 しておく。A pair of sliders 9 and 10 are slidably provided in the rotor 8, and the sliders 9 and 10 are constantly pressed against the inner wall surface 12 of the pump chamber 3 by a spring 11 interposed therebetween. Keep it.
【0009】 回転子8を矢印A8方向に回転する電源(図示してない)によって回転すると 共に、同じ電源によってそれと連動して電磁弁6を閉じ、ポンプ室3内の空気を 排気用通路13及び排出口14から大気中に排出し、吸気用通路1内の空気を負 圧にし、その負圧と空調機等の配管15内の空気圧との差圧によって吸気ばね1 6を圧縮して吸気用逆止弁4を開口し、吸入口2から前記配管内の空気を吸入し 、それを負圧にして乾燥する。The rotor 8 is rotated by a power source (not shown) that rotates in the direction of arrow A8, and the electromagnetic valve 6 is closed in conjunction with the power source by the same power source, and the air in the pump chamber 3 is exhausted by the exhaust passage 13 and The air is discharged from the discharge port 14 to the atmosphere, and the air in the intake passage 1 is made to have a negative pressure. The intake spring 16 is compressed by the differential pressure between the negative pressure and the air pressure in the piping 15 of an air conditioner or the like. The check valve 4 is opened, the air in the pipe is sucked through the suction port 2, and the air is dried under a negative pressure.
【0010】 この乾燥作業が終了して、回転子8の電源を切ったり、或いは何かの原因によ って不用意に電源が切れたりした際は、回転子8の回転が停止すると共に、それ と連動して電磁弁6の電源も切れて、電磁弁6が電磁ばね17を圧縮して移動し 、その入口18が出口7に連通し、大気が空気導入口5から吸気通路1内に入り 込み、その中の負圧を大気圧に瞬時に変化する。When the drying operation is completed and the power of the rotor 8 is turned off or the power is inadvertently turned off for some reason, the rotation of the rotor 8 is stopped, In conjunction with this, the power of the solenoid valve 6 is also turned off, and the solenoid valve 6 moves by compressing the electromagnetic spring 17, the inlet 18 communicates with the outlet 7, and the atmosphere flows from the air inlet 5 into the intake passage 1. When it enters, the negative pressure in it instantaneously changes to atmospheric pressure.
【0011】 そのため、吸入口2に接続されている配管15内の負圧より吸気通路1内の気 圧の方が高まって、吸気用逆止弁4を上向きに押し付け、それを閉じ、ポンプ室 3内の鉱物オイルが配管15内の負圧によってそこに吸引されることを防止する 。Therefore, the air pressure in the intake passage 1 becomes higher than the negative pressure in the pipe 15 connected to the suction port 2, and presses the intake check valve 4 upward, closes it, and opens the pump chamber. 3 prevents the mineral oil in 3 from being sucked into by the negative pressure in the pipe 15.
【0012】 上記図1に示す本考案の実施形態は前述のようにポンプ室3に連通する吸気通 路1に吸気用逆止弁4の弁体19を設ける際、それをポンプ室3のケーシング2 0の上部に直接接続する場合について図示しているが、図2に示す実施形態は吸 気用逆止弁4の外付用弁体21をケーシング20の一部に直接に続せずに、吸気 用配管22及び、接手23を介して接続する場合について図示している。In the embodiment of the present invention shown in FIG. 1 described above, when the valve body 19 of the intake check valve 4 is provided in the intake passage 1 communicating with the pump chamber 3 as described above, it is attached to the casing of the pump chamber 3. FIG. 2 shows a case in which the external valve body 21 of the intake check valve 4 is not directly connected to a part of the casing 20. , The case of connection via an intake pipe 22 and a joint 23 is shown.
【0013】 図2に示す図面符号中、図1に示す図面符号と等しい部分は、その機能につい ても同様であり、従って図2中鎖線20で示す部分の内部構造も図1のそれと同 一である。In the drawing symbols shown in FIG. 2, those parts which are the same as those shown in FIG. 1 have the same functions, and accordingly, the internal structure of the part shown by chain line 20 in FIG. 2 is the same as that of FIG. It is.
【0014】[0014]
【考案の効果】[Effect of the invention]
この考案は上述のとおりであるから、真空ポンプの運転時における到達真空度 及び、その排気速度を損なわずに真空ポンプ内の鉱物オイルの配管内に向かって 流れる逆流防止を行うことができる。 Since the invention is as described above, it is possible to prevent the backflow of the mineral oil in the vacuum pump flowing into the piping without impairing the ultimate vacuum degree during the operation of the vacuum pump and the evacuation speed.
【0015】 また真空ポンプの回転子を回転するモータの電源と電磁弁の電源とを連動可能 に接続したから、供給電源以外の故障の場合でもモータの電源が遮断すれば逆止 弁が作動して、吸入口を閉じ、真空ポンプ内の鉱物オイルが空調機等の合成オイ ルに混入することを防止できる。Further, since the power supply of the motor that rotates the rotor of the vacuum pump and the power supply of the solenoid valve are connected so as to be interlocked with each other, even in the case of a failure other than the supply power supply, if the power supply of the motor is cut off, the check valve operates. By closing the suction port, it is possible to prevent mineral oil in the vacuum pump from being mixed into synthetic oil such as an air conditioner.
【図面の簡単な説明】[Brief description of the drawings]
【図1】この考案の装置の実施の形態を示す縦断面図で
ある。
FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention.
【図2】この考案の装置の他の実施の形態を示す縦断面
図である。
FIG. 2 is a longitudinal sectional view showing another embodiment of the device of the present invention.
【符号の説明】[Explanation of symbols]
1 吸気通路 2 吸入口 3 ポンプ室 4 吸気用逆止弁 5 空気導入口 6 電磁弁 7 出口 8 回転子 15 配管 21 外付用弁体 DESCRIPTION OF SYMBOLS 1 Intake passage 2 Intake port 3 Pump room 4 Intake check valve 5 Air inlet 6 Solenoid valve 7 Outlet 8 Rotor 15 Piping 21 External valve body

Claims (3)

    【実用新案登録請求の範囲】[Utility model registration claims]
  1. 【請求項1】ポンプ室に通ずる吸気通路に吸気用逆止弁
    を介して、吸入口を設け、その逆止弁とポンプ室との間
    における吸気通路に空気導入口を設け、該空気導入口に
    外気と通ずる電磁弁の出口を接続し、前記ポンプ室内の
    真空回転子の電源と電磁弁の電源とを電気的に連動可能
    に結合することを特徴とする真空ポンプのオイル逆流防
    止装置。
    An intake port is provided in an intake passage leading to a pump chamber via an intake check valve, and an air intake port is provided in an intake passage between the check valve and the pump chamber. An outlet of a solenoid valve that communicates with the outside air, and a power supply of a vacuum rotor in the pump chamber and a power supply of the solenoid valve are electrically operatively connected to each other.
  2. 【請求項2】ポンプ室に通ずる吸気通路が該ポンプ室を
    構成するケーシングの内部と、吸気用逆止弁を構成する
    弁体の内部に形成されていることを特徴とする請求項1
    記載の真空ポンプのオイル逆流防止装置。
    2. An intake passage communicating with the pump chamber is formed inside a casing forming the pump chamber and inside a valve body forming a check valve for intake.
    An oil backflow prevention device for a vacuum pump according to the above.
  3. 【請求項3】ポンプ室に通ずる吸気通路が、ポンプ室と
    連通する吸気配管の内部と、吸気用逆止弁を内蔵する外
    付用弁体で形成されていることを特徴とする真空ポンプ
    のオイル逆流防止装置。
    3. A vacuum pump according to claim 1, wherein an intake passage communicating with the pump chamber is formed by an inside of an intake pipe communicating with the pump chamber and an external valve body having a built-in check valve for intake. Oil backflow prevention device.
JP2000000671U 2000-02-14 2000-02-14 Oil backflow prevention device for vacuum pump Expired - Fee Related JP3070980U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000000671U JP3070980U (en) 2000-02-14 2000-02-14 Oil backflow prevention device for vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000000671U JP3070980U (en) 2000-02-14 2000-02-14 Oil backflow prevention device for vacuum pump

Publications (1)

Publication Number Publication Date
JP3070980U true JP3070980U (en) 2000-08-22

Family

ID=43204340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000000671U Expired - Fee Related JP3070980U (en) 2000-02-14 2000-02-14 Oil backflow prevention device for vacuum pump

Country Status (1)

Country Link
JP (1) JP3070980U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009024661A (en) * 2007-07-23 2009-02-05 Nabtesco Corp Negative pressure source device
JP2009533598A (en) * 2006-04-10 2009-09-17 ワブコ オートモーティブ ユーケー リミテッド Improved vacuum pump
JP2011023427A (en) * 2009-07-13 2011-02-03 Canon Inc Pressure-reducing apparatus, pressurizing apparatus, exposure apparatus, and method of manufacturing device
US10371148B2 (en) 2011-08-17 2019-08-06 Wabco Automotive Uk Limited Vacuum pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009533598A (en) * 2006-04-10 2009-09-17 ワブコ オートモーティブ ユーケー リミテッド Improved vacuum pump
JP2009024661A (en) * 2007-07-23 2009-02-05 Nabtesco Corp Negative pressure source device
JP2011023427A (en) * 2009-07-13 2011-02-03 Canon Inc Pressure-reducing apparatus, pressurizing apparatus, exposure apparatus, and method of manufacturing device
US10371148B2 (en) 2011-08-17 2019-08-06 Wabco Automotive Uk Limited Vacuum pump

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