JPH0517435Y2 - - Google Patents
Info
- Publication number
- JPH0517435Y2 JPH0517435Y2 JP1987160001U JP16000187U JPH0517435Y2 JP H0517435 Y2 JPH0517435 Y2 JP H0517435Y2 JP 1987160001 U JP1987160001 U JP 1987160001U JP 16000187 U JP16000187 U JP 16000187U JP H0517435 Y2 JPH0517435 Y2 JP H0517435Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- solenoid valve
- auto
- valve
- way solenoid
- 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 - Lifetime
Links
- 230000009467 reduction Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010926 purge Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 244000145845 chattering Species 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、圧縮機の無負荷運転時レシーバタン
ク内の圧縮空気をパージして無負荷運転動力を軽
減するように構成した圧縮機の無負荷動力軽減装
置に関する。[Detailed description of the invention] (Field of industrial application) The present invention is a compressor that is configured to purge the compressed air in the receiver tank during no-load operation of the compressor to reduce the no-load operation power. The present invention relates to a load power reduction device.
（従来技術）
従来、圧縮機には吸入空気の容量制御を行うア
ンローダ装置と連動し、無負荷運転時吐出側の背
圧を一定圧力までパージさせ、該運転時における
動力の軽減を図るようにした無負荷時動力軽減装
置が設けられている。かかる装置としては、実開
昭48−57704号公報に示すものが知られている。(Prior art) Conventionally, a compressor is linked with an unloader device that controls the capacity of intake air, and the back pressure on the discharge side is purged to a constant pressure during no-load operation, in order to reduce power consumption during such operation. A no-load power reduction device is provided. As such a device, one shown in Japanese Utility Model Application Publication No. 48-57704 is known.
この装置は、圧縮機の無負荷運転移行時吸気閉
塞弁を閉じると共に吸入口の負圧を検知してパー
ジ弁を動作せしめ、油分離器内の圧力を保圧弁の
設定圧力（1.5〜2kgf／cm2ゲージ圧力）まで下げ
無負荷運転状態を維持すると共に、圧縮機の停止
時には別途配置の電磁弁からのパイロツト圧によ
り作動する圧縮空気自動放出弁を動作せしめ、前
記油分離器内の圧縮空気を0kgf／cm2ゲージ圧力
まで大気開放する。 This device closes the intake blockage valve when the compressor transitions to no-load operation, detects negative pressure at the suction port, operates the purge valve, and adjusts the pressure inside the oil separator to the pressure set by the pressure holding valve (1.5 to 2 kgf/ cm 2 gauge pressure) to maintain a no-load operating state, and when the compressor is stopped, an automatic compressed air release valve, which is operated by pilot pressure from a separately installed solenoid valve, is activated to release the compressed air in the oil separator. is released to the atmosphere to a pressure of 0 kgf/cm 2 gauge.
そして、前記パージ弁には通常電磁弁が用いら
れるのが普通で、比較的大型の電磁弁を用いる割
にはその吐出容量は少く、前記圧縮空気自動放出
弁に比べ少いのが普通である。 A solenoid valve is normally used as the purge valve, and although a relatively large solenoid valve is used, its discharge capacity is small, and is usually smaller than that of the automatic compressed air release valve. .
（考案が解決しようとする問題点）
以上のように、従来の圧縮機に用いられるパー
ジ弁と圧縮空気自動放出弁は、共に油分離器内の
圧縮空気を大気放出するという共通の作用を有し
つつも、各々は個別に配設され制御されている。(Problems to be solved by the invention) As described above, the purge valve and automatic compressed air release valve used in conventional compressors both have the common function of releasing the compressed air in the oil separator to the atmosphere. However, each is individually arranged and controlled.
その為、圧縮機１台当りの部品点数及び配管本
数も自ずと多く、装置全体の構造及びその電気制
御系統も複雑でかつコスト高となつている。 Therefore, the number of parts and pipes per compressor is naturally large, and the structure of the entire device and its electrical control system are also complex and costly.
それと共に、前記パージ弁は電磁弁構造のもの
であるから、高価でかつ無負荷運転移行時のパー
ジ時間も長く、特に圧縮機の全負荷、無負荷間の
動作頻度が多い場合には応答性に劣り充分な無負
荷動力の低減効果が得られないという問題点を有
している。 At the same time, since the purge valve has a solenoid valve structure, it is expensive and takes a long time to purge when transitioning to no-load operation, and the responsiveness is particularly low when the compressor frequently operates between full load and no-load operation. However, the problem is that a sufficient no-load power reduction effect cannot be obtained.
（考案の目的）
本考案は、以上の問題点に鑑み、圧縮空気自動
放出弁に無負荷運転移行時のレシーバタンク圧パ
ージ用と圧縮機停止時における前記タンク圧開放
用の二つの機能を果させ、構造の簡素化と圧縮空
気パージ時間の短縮を図り、安価でしかも応答性
能のよい無負荷動力軽減装置を提供することを目
的とする。(Purpose of the invention) In view of the above problems, the present invention provides an automatic compressed air release valve with two functions: purging the receiver tank pressure when transitioning to no-load operation, and releasing the tank pressure when the compressor is stopped. The present invention aims to simplify the structure and shorten the compressed air purge time, and to provide an inexpensive no-load power reduction device with good response performance.
（考案の構成）
以上の目的を達成する為に、本考案は吸入口に
吸入空気制御用のアンローダ装置を有し、停止時
レシーバタンク内圧を大気へ自動放出するオート
レリーフバルブを備えた圧縮機において、前記吸
入口には負圧検知用の圧力スイツチVSを、レシ
ーバタンク側には内圧低下検知用の圧力スイツチ
VSを設け、レシーバタンクとオートレリーフバ
ルブ間を三方電磁弁を介してパイロツト配管で接
続すると共に、圧縮機の停止信号、前記圧力スイ
ツチVSおよびPSからの信号に基づき前記三方電
磁弁SVを切り替えオートレリーフバルブを開閉
するよう構成せしめ、圧縮機の停止時は該停止信
号により、また前記圧力スイツチVSの負圧検知
時は該負圧検知信号により前記三方電磁弁SVを
オートレリーフバルブが開く側に切り替え、一方
前記圧力スイツチPSの内圧低下検知時は該信号
により前記三方電磁弁SVをオートレリーフバル
ブが閉じる側に切り替えるよう構成したことを特
徴とする。(Structure of the invention) In order to achieve the above objectives, the present invention is a compressor equipped with an unloader device for controlling intake air at the suction port and an auto-relief valve that automatically releases the internal pressure of the receiver tank to the atmosphere when stopped. , a pressure switch VS for detecting negative pressure is installed at the suction port, and a pressure switch VS for detecting a drop in internal pressure is installed at the receiver tank side.
A VS is provided, and the receiver tank and the auto relief valve are connected by pilot piping via a three-way solenoid valve, and the three-way solenoid valve SV is automatically switched based on the compressor stop signal and signals from the pressure switches VS and PS. The relief valve is configured to open and close, and when the compressor is stopped, the stop signal is used, and when the pressure switch VS detects negative pressure, the negative pressure detection signal causes the three-way solenoid valve SV to be set to the side where the auto relief valve opens. On the other hand, when a drop in the internal pressure of the pressure switch PS is detected, the three-way solenoid valve SV is switched to the side where the auto-relief valve closes based on the signal.
（実施例）
以下第１図及び第２図に基づき、本考案実施例
について説明する。(Example) An example of the present invention will be described below based on FIGS. 1 and 2.
圧縮機本体１の吸入口２にはアンローダ装置３
が設けられ、レシーバタンク４、配管５、レギユ
レータ６、逆止弁７、配管８を介して導入される
圧縮空気により圧縮機本体１内に流入する吸入空
気量を制御する。 An unloader device 3 is installed at the suction port 2 of the compressor body 1.
is provided to control the amount of intake air flowing into the compressor main body 1 by compressed air introduced via the receiver tank 4, piping 5, regulator 6, check valve 7, and piping 8.
また、吸入口２には負圧検知用の圧力スイツチ
VS及びアンローダ復帰用の三方電磁弁SVVが接
続されている。 In addition, the suction port 2 has a pressure switch for negative pressure detection.
VS and three-way solenoid valve SVV for unloader return are connected.
この電磁弁は、圧縮機の無負荷運転時吸入室２
内の過度の真空を緩和するもので、全負荷運転中
は配管９，１１が連通、配管１０は閉、無負荷運
転中は配管１０，１１が連通、配管９は閉となる
ように設定されている。 This solenoid valve is used in the suction chamber 2 during no-load operation of the compressor.
It is set so that during full load operation, pipes 9 and 11 are in communication and pipe 10 is closed, and during no-load operation, pipes 10 and 11 are in communication and pipe 9 is closed. ing.
なお、１２は絞りである。 Note that 12 is an aperture.
一方、レシーバタンク４に接続する配管５には
配管１３を介してドレーンタンク１４が接続し、
その下方底部にはオートレリーフバルブ１５が設
けられ、前記ドレーンタンク１４からパイロツト
配管１６，１６′三方電磁弁SVを介して導入され
るパイロツト圧により、レシーバタンク４内の圧
縮空気を大気開放するようになつている。 On the other hand, a drain tank 14 is connected to the pipe 5 connected to the receiver tank 4 via a pipe 13.
An auto-relief valve 15 is provided at the bottom of the receiver tank 4, and is configured to release the compressed air in the receiver tank 4 to the atmosphere by pilot pressure introduced from the drain tank 14 through the pilot piping 16, 16' and the three-way solenoid valve SV. It's getting old.
即ち、三方電磁弁SVのポートａはパイロツト
配管１６を介してドレーンタンク１４と連通し、
その他方のポートｃよりパイロツト配管１６′を
介してオートレリーフバルブ１５のダイヤフラム
室１７と接続している。 That is, port a of the three-way solenoid valve SV communicates with the drain tank 14 via the pilot pipe 16,
The other port c is connected to the diaphragm chamber 17 of the auto relief valve 15 via a pilot pipe 16'.
さらに、もう一方のポートｂは大気と連通する
排気ポートとなつている。 Furthermore, the other port b serves as an exhaust port communicating with the atmosphere.
また、レシーバタンク４には、該タンク内圧が
ある一定圧力（1.5〜2kgf／cm2ゲージ圧力）まで
低下したときに、これを検知して三方電磁弁SV
を動作させる圧力スイツチPSが設けられると共
に、その空気取出口１８には圧力調整弁兼逆止弁
１９を介して供給配管２０が接続し、消費側への
圧縮空気の供給が成される。 In addition, the receiver tank 4 is equipped with a three-way solenoid valve SV that detects when the tank internal pressure drops to a certain pressure (1.5 to 2 kgf/cm 2 gauge pressure).
A pressure switch PS is provided to operate the air outlet 18, and a supply pipe 20 is connected to the air outlet 18 via a pressure regulating valve/check valve 19 to supply compressed air to the consumer side.
そして、前記圧力スイツチ及び三方電磁弁の電
気制御回路は第２図に示すように、電源に対して
並列に圧力スイツチVS及びPSが接続されると共
に、それらと直列に三方電磁弁SVが接続されて
いる。 As shown in Fig. 2, the electric control circuit for the pressure switch and three-way solenoid valve is such that the pressure switches VS and PS are connected in parallel to the power supply, and the three-way solenoid valve SV is connected in series with them. ing.
そして、前記圧力スイツチVSの接点は圧縮機
本体１の吸入口２内が負圧となつたときに開とな
り、正圧時は閉となる。 The contacts of the pressure switch VS are opened when the suction port 2 of the compressor main body 1 has a negative pressure, and are closed when the pressure is positive.
一方、圧力スイツチPSの接点はレシーバタン
ク内圧が後述する第３図中のP3の圧力点（通常
1.5〜2kgf／cm2）以下のときは閉、それ以上のと
きは開となるように設定されている。 On the other hand, the contact point of the pressure switch PS is connected to the receiver tank internal pressure at pressure point P 3 (usually
It is set to close when it is below 1.5 to 2 kgf/cm 2 ) and open when it is above that.
また、図においてRUNは始動スイツチ、
STOPは停止スイツチ、MCは電磁開閉器を示
す。 Also, in the figure, RUN is the start switch,
STOP indicates a stop switch, and MC indicates an electromagnetic switch.
次いで、第１図ないし第３図によりその作用を
説明する。 Next, the operation will be explained with reference to FIGS. 1 to 3.
まず、第２図に示す始動スイツチRUNを押し
圧縮機を運転すると、アンローダ装置３より吸入
され圧縮された空気はレシーバタンク４内に蓄圧
され、第３図のP1若しくはその近傍圧力で消費
側に供給される。このとき、三方電磁弁SVは圧
力スイツチVSの接点が閉、圧力スイツチPSの接
点が開となつているので通電され、第１図中Ａ側
に位置している。 First, when the start switch RUN shown in Fig. 2 is pressed to operate the compressor, the air sucked in from the unloader device 3 and compressed is accumulated in the receiver tank 4, and the pressure on the consumption side is at or near P 1 in Fig. 3. is supplied to At this time, the three-way solenoid valve SV is energized and located on the A side in FIG. 1 because the contacts of the pressure switch VS are closed and the contacts of the pressure switch PS are open.
次に、消費側に於て圧縮空気の消費が停止する
と、レシーバタンク４内の圧力は第３図P1から
P2に昇圧する。 Next, when the consumption of compressed air stops on the consumption side, the pressure inside the receiver tank 4 will change from P 1 in Figure 3.
Boost to P2 .
すると、レギユレータ６のニードルバルブ２５
が開き、アンローダ装置３のダイヤフラム室２６
内にレシーバタンク内圧が作用し、次いでアンロ
ーダバルブ２７を閉塞し吸入空気を閉める。この
閉動作により、吸入口２内は急速に負圧となり、
負圧検知用の圧力スイツチVSが動作し、その接
点を開く。 Then, the needle valve 25 of the regulator 6
opens, and the diaphragm chamber 26 of the unloader device 3 opens.
The internal pressure of the receiver tank acts inside the tank, and then the unloader valve 27 is closed to close the intake air. Due to this closing operation, the inside of the suction port 2 rapidly becomes negative pressure,
Pressure switch VS for negative pressure detection operates and opens its contacts.
このとき、圧力スイツチPSの接点はレシーバ
タンク４内圧力がP3以上にある為開となつてお
り、したがつて三方電磁弁SVは非通電となり、
第１図中Ａ側よりＢ側に切り替わる。 At this time, the contacts of the pressure switch PS are open because the pressure inside the receiver tank 4 is above P3 , and therefore the three-way solenoid valve SV is de-energized.
In FIG. 1, the A side is switched to the B side.
これにより、レシーバタンク内圧はドレーンタ
ンク１４パイロツト配管１６，１６′を介してオ
ートレリーフバルブ１５のダイヤフラム室１７に
作用し、ピストン２８を押し上げそのバルブシー
ト部２９を開く、よつて、前記レシーバタンク内
圧は大気にパージされ第３図中の線イに沿つて急
速に降下し、圧力P3の点に達する。 As a result, the receiver tank internal pressure acts on the diaphragm chamber 17 of the auto-relief valve 15 through the drain tank 14 pilot piping 16, 16', pushing up the piston 28 and opening its valve seat 29. Therefore, the receiver tank internal pressure is purged into the atmosphere and rapidly falls along line A in Figure 3, reaching a point of pressure P3 .
すると、圧力スイツチPSの接点は閉となつて
前記三方電磁弁SVは通電され、第１図中Ｂ側よ
りＡ側に切り替わる。その為、パイロツト配管１
６，１６′は閉じ、オートレリーフバルブ１５に
よるパージ作用が停止し、この状態で圧縮機は無
負荷運転を継続する。 Then, the contacts of the pressure switch PS are closed and the three-way solenoid valve SV is energized, switching from the B side to the A side in FIG. Therefore, pilot piping 1
6 and 16' are closed, the purge action by the auto-relief valve 15 is stopped, and the compressor continues its no-load operation in this state.
そして、さらに無負荷運転が継続され、圧縮機
が停止されると、電磁開閉器MCの接点は開とな
り、前記三方電磁弁SVは再び非通電となつてＡ
側よりＢ側に切り替わり、オートレリーフバルブ
１５を作用させてレシーバタンク４内圧を大気に
完全放気する。以上のように、電磁開閉器MCの
接点と圧力スイツチVSの接点は三方電磁弁SVと
直列に接続され、圧縮機の停止信号と圧力スイツ
チVSの負圧検知信号により圧縮機の停止時電磁
開閉器MCの接点が開となり、また圧力スイツチ
VSの負圧検知時圧力スイツチVSの接点が開とな
り、いづれの場合も三方電磁弁SVが非通電とな
り、オートレリーフバルブが開となる。 Then, when the no-load operation continues and the compressor is stopped, the contact point of the electromagnetic switch MC becomes open, and the three-way electromagnetic valve SV becomes de-energized again and the A
The side is switched from the side to the side B, and the auto relief valve 15 is activated to completely release the internal pressure of the receiver tank 4 to the atmosphere. As described above, the contacts of the electromagnetic switch MC and the pressure switch VS are connected in series with the three-way solenoid valve SV, and the electromagnetic opening/closing when the compressor is stopped is triggered by the compressor stop signal and the negative pressure detection signal of the pressure switch VS. The contact of the device MC is opened and the pressure switch is
When negative pressure is detected in VS, the pressure switch VS contact opens, and in either case, the three-way solenoid valve SV becomes de-energized and the auto-relief valve opens.
（第２実施例）
第４図及び第５図は本考案の第２実施例で、無
負荷運転移行時、圧縮機が中間負荷状態となつた
際に、レシーバタンク内圧のパージによりアンロ
ーダのダイヤフラム室２６内の内圧が不足しアン
ローダバルブ２７が半開きとなりチヤタリング現
象を生ずることを防止したものである。(Second Embodiment) Figures 4 and 5 show a second embodiment of the present invention, in which when the compressor enters an intermediate load state during transition to no-load operation, the diaphragm of the unloader is removed by purging the receiver tank internal pressure. This prevents the unloader valve 27 from being half-opened due to insufficient internal pressure in the chamber 26, which would cause a chattering phenomenon.
即ち、第１実施例で説明した圧力スイツチVS，
PSの他に、消費側の供給配管２０に該管内の圧
力変化を検知する圧力スイツチPSSを追加すると
共に、三方電磁弁SVVの一次側配管１０′を供給
配管２０に接続し、無負荷運転移行と同時に前記
供給配管２０内圧を直ちにアンローダのダイヤフ
ラム室２６内に導入し、レシーバタンク内圧のパ
ージに伴う圧力不足を補い、アンローダバルブ２
７を確実に閉塞し続けるようにする。 That is, the pressure switch VS explained in the first embodiment,
In addition to PS, a pressure switch PSS that detects pressure changes in the pipe is added to the supply pipe 20 on the consumption side, and the primary side pipe 10' of the three-way solenoid valve SVV is connected to the supply pipe 20 to shift to no-load operation. At the same time, the internal pressure of the supply pipe 20 is immediately introduced into the diaphragm chamber 26 of the unloader to compensate for the lack of pressure caused by purging the internal pressure of the receiver tank, and the unloader valve 2
7 to ensure that it continues to be occluded.
そして、この場合の電気制御回路は第５図に示
すようになつており、圧力スイツチPSSの接点は
供給配管２０内圧がP1下方近傍以下のときは開、
それ以上のときは閉、圧力スイツチVSの接点は
吸入口２内圧が正圧の場合は開、負圧のときは閉
となるように設定し、それぞれの信号は三方電磁
弁SVVに入力するようになつている。 The electric control circuit in this case is as shown in Fig. 5, and the contacts of the pressure switch PSS are opened when the internal pressure of the supply pipe 20 is below the vicinity of the lower part of P1 .
The contacts of the pressure switch VS are set to open when the internal pressure of the suction port 2 is positive and close when the pressure is negative, and each signal is input to the three-way solenoid valve SVV. It's getting old.
さらに、圧力スイツチPSの接点はレシーバタ
ンク内圧がP3以下の場合は開、P3以上のときは
閉となるように設定され、その信号は電磁開閉器
PX１を介して三方電磁弁SVに入力するように構
成されている。そして、圧縮機の停止時電磁開閉
器MCの接点が開となり、三方電磁弁が非通電と
なり、また、圧力スイツチVSの負圧検知時圧力
スイツチVSの接点が閉、この時圧力スイツチ
PSSおよびPSの接点は閉で電磁開閉器PX１は通
電され接点が開となり、三方電磁弁が非通電とな
り、圧縮機の停止信号と前記圧力スイツチVSの
負圧検知信号路によつていづれの場合も三方電磁
弁が非通電となりオートレリーフバルブが開とな
る。 Furthermore, the contacts of the pressure switch PS are set to open when the receiver tank internal pressure is below P 3 and close when it is above P 3 , and the signal is sent to the electromagnetic switch.
It is configured to be input to the three-way solenoid valve SV via PX1. When the compressor is stopped, the contact of the electromagnetic switch MC is opened, and the three-way electromagnetic valve is de-energized, and when the pressure switch VS detects negative pressure, the contact of the pressure switch VS is closed.
The contacts of PSS and PS are closed, the solenoid switch PX1 is energized and the contact is open, and the three-way solenoid valve is de-energized. Also, the three-way solenoid valve is de-energized and the auto-relief valve is opened.
本考案第２実施例は以上のように構成したの
で、圧縮機の無負荷運転移行時は圧力スイツチ
VSは閉、圧力スイツチPSSも閉となり、アンロ
ーダのダイヤフラム室２６内にはレギユレータ６
を介して導入されたレシーバタンク内圧力と、三
方電磁弁SVVを介して導入された供給配管内圧
力とが加わる。 Since the second embodiment of the present invention is constructed as described above, the pressure switch is turned off when the compressor shifts to no-load operation.
VS is closed, the pressure switch PSS is also closed, and the regulator 6 is in the diaphragm chamber 26 of the unloader.
The pressure inside the receiver tank introduced through the three-way solenoid valve SVV and the pressure inside the supply pipe introduced through the three-way solenoid valve SVV are added.
同時に、圧力スイツチPSもレシーバタンク４
内圧がP3以上にある為その接点を閉じており、
三方電磁弁SVは非通電となり、第４図中Ａ側よ
りＢ側に切り替わりオートレリーフバルブ１５に
よりレシーバタンク内圧を大気にパージする。 At the same time, the pressure switch PS also
Since the internal pressure is above P 3 , the contact is closed,
The three-way solenoid valve SV is de-energized and switched from the A side to the B side in FIG. 4, and the auto relief valve 15 purges the receiver tank internal pressure to the atmosphere.
このときの前記パージ動作により例えばレシー
バタンク内圧が低下しても、アンローダダイヤフ
ラム室２６内には消費側供給配管２０内の圧力が
加わつている為、アンローダバルブ２７は確実に
閉止し続けるので、該バルブのチヤタリング現象
は生ずることはない。 Even if, for example, the internal pressure of the receiver tank decreases due to the purging operation at this time, the pressure inside the consumption-side supply pipe 20 is applied to the unloader diaphragm chamber 26, so the unloader valve 27 remains reliably closed. No valve chattering phenomenon occurs.
（第３実施例）
第６図は、第２実施例で説明したオートレリー
フバルブ１５′の構造をパイロツト配管１６′から
の圧力供給が遮断されたときに開、パイロツト圧
導入のときに閉となるように構成したもので、し
たがつて三方電磁弁SVの配管系統も通電時開
（Ｂ側）、非通電磁閉（Ａ側）となるように接続さ
れており、その基本作用は第２実施例で説明した
内容と同じであるので省略する。(Third Embodiment) Figure 6 shows the structure of the auto-relief valve 15' explained in the second embodiment, which opens when the pressure supply from the pilot pipe 16' is cut off and closes when pilot pressure is introduced. Therefore, the piping system of the three-way solenoid valve SV is also connected so that it is open when energized (B side) and closed when energized (A side), and its basic operation is as follows. Since the contents are the same as those explained in the embodiment, the explanation will be omitted.
なお、この場合パイロツト配管１６″を配管１
０′と三方電磁弁SV間に追加してあるが、これは
オートレリーフバルブ１５′からの放気時ドレー
ンタンク１４内圧低下に伴うダイヤフラム室１７
内圧の不足を供給配管２０内圧力によつて補うた
めのものである。 In this case, pilot piping 16'' is connected to piping 1.
0' and the three-way solenoid valve SV, this is the diaphragm chamber 17 due to the decrease in the internal pressure of the drain tank 14 when air is released from the auto relief valve 15'.
This is to compensate for the lack of internal pressure with the internal pressure of the supply pipe 20.
また、３１は逆止弁である。 Further, 31 is a check valve.
（考案の効果）
以上で説明した如く、本考案は従来機で用いる
無負荷時動力軽減用のパージ弁を廃止し、既存の
オートレリーフバルブに前記パージ弁の作用と停
止時レシーバタンク内圧の完全放気双方の作用を
果させるように構成したので、部品点数の減少と
構造の簡素化が図られる他、大容量の圧縮空気パ
ージ用の大型電磁弁も不要となり、大巾なコスト
ダウンが達成できる。(Effects of the invention) As explained above, the present invention eliminates the purge valve used in conventional machines to reduce power during no-load conditions, and replaces the existing auto-relief valve with the effect of the purge valve and completely reduces the internal pressure of the receiver tank when stopped. Since it is configured to perform both functions of air release, it not only reduces the number of parts and simplifies the structure, but also eliminates the need for a large solenoid valve for purging large volumes of compressed air, resulting in significant cost reductions. can.
また、停止時レシーバタンクの内圧を開放する
前記オートレリーフバルブは、大容量であるた
め、無負荷運転移行時におけるレシーバタンク内
圧のパージ作用も従来以上に多量に成されるの
で、該パージ時間も短縮し全負荷、無負荷の応答
性能も一段と向上し、さらに無負荷運転時におけ
る運転動力の軽減効果も増大する。 In addition, since the auto-relief valve that releases the internal pressure of the receiver tank when stopped has a large capacity, the purging action of the receiver tank internal pressure during transition to no-load operation is performed in a larger amount than before, so the purging time is also reduced. This further improves response performance at full load and no load, and further increases the effect of reducing operating power during no load operation.
第１図は本考案装置の第１実施例の全体詳細
図、第２図はその電気制御回路図、第３図はレシ
ーバタンク内の圧力状態説明用の説明図、第４図
は第２実施例の全体詳細図、第５図はその電気制
御回路図、第６図は第３実施例の詳細図である。
１……圧縮機本体、２……吸入口、３……アン
ローダ装置、４……レシーバタンク、６……レギ
ユレータ、１５……オートレリーフバルブ、１
６，１６′……パイロツト配管、VS……圧力スイ
ツチ、PS……圧力スイツチ、SV……三方電磁
弁。
Fig. 1 is an overall detailed view of the first embodiment of the device of the present invention, Fig. 2 is its electrical control circuit diagram, Fig. 3 is an explanatory diagram for explaining the pressure state in the receiver tank, and Fig. 4 is the second embodiment. FIG. 5 is an electrical control circuit diagram thereof, and FIG. 6 is a detailed diagram of the third embodiment. 1... Compressor body, 2... Suction port, 3... Unloader device, 4... Receiver tank, 6... Regulator, 15... Auto relief valve, 1
6,16'...Pilot piping, VS...Pressure switch, PS...Pressure switch, SV...3-way solenoid valve.
Claims (1)
し、停止時レシーバタンク内圧を大気へ自動放出
するオートレリーフバルブを備えた圧縮機におい
て、前記吸入口には負圧検知用の圧力スイツチ
VSを、レシーバタンク側には内圧低下検知用の
圧力スイツチVSを設け、レシーバタンクとオー
トレリーフバルブ間を三方電磁弁を介してパイロ
ツト配管で接続すると共に、圧縮機の停止信号、
前記圧力スイツチVSおよびPSからの信号に基づ
き前記三方電磁弁SVを切り替えオートレリーフ
バルブを開閉するよう構成せしめ、圧縮機の停止
時は該停止信号により、また前記圧力スイツチ
VSの負圧検知信号により前記三方電磁弁SVをオ
ートレリーフバルブが開く側に切り替え、一方前
記圧力スイツチPSの内圧低下検知時は該信号に
より前記三方電磁弁SVをオートレリーフバルブ
が閉じる側に切り替えるよう構成したことを特徴
とする圧縮機の無負荷動力軽減装置。 In a compressor equipped with an unloader device for controlling intake air at the suction port and an auto-relief valve that automatically releases the internal pressure of the receiver tank to the atmosphere when stopped, the suction port is equipped with a pressure switch for detecting negative pressure.
A pressure switch VS is installed on the receiver tank side to detect internal pressure drop, and a pilot piping connects the receiver tank and auto relief valve via a three-way solenoid valve.
The three-way solenoid valve SV is switched to open and close the auto relief valve based on signals from the pressure switches VS and PS, and when the compressor is stopped, the pressure switch is
A negative pressure detection signal from VS switches the three-way solenoid valve SV to the side where the auto-relief valve opens, and when a drop in the internal pressure of the pressure switch PS is detected, the signal switches the three-way solenoid valve SV to the side where the auto-relief valve closes. A no-load power reduction device for a compressor, characterized in that it is configured as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987160001U JPH0517435Y2 (en) | 1987-10-21 | 1987-10-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987160001U JPH0517435Y2 (en) | 1987-10-21 | 1987-10-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01114996U JPH01114996U (en) | 1989-08-02 |
| JPH0517435Y2 true JPH0517435Y2 (en) | 1993-05-11 |
Family
ID=31441702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987160001U Expired - Lifetime JPH0517435Y2 (en) | 1987-10-21 | 1987-10-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0517435Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2814272B2 (en) * | 1989-10-05 | 1998-10-22 | 北越工業株式会社 | Rotary compressor capacity control method |
| JP5711684B2 (en) * | 2012-03-19 | 2015-05-07 | デンヨー株式会社 | Engine driven compressor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5112008B2 (en) * | 1972-04-19 | 1976-04-15 | ||
| JPS62118079A (en) * | 1985-11-15 | 1987-05-29 | Kobe Steel Ltd | Intake air regulating device for displacement type compressor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4998805U (en) * | 1972-12-18 | 1974-08-26 | ||
| JPS5514785Y2 (en) * | 1974-07-15 | 1980-04-04 |
-
1987
- 1987-10-21 JP JP1987160001U patent/JPH0517435Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5112008B2 (en) * | 1972-04-19 | 1976-04-15 | ||
| JPS62118079A (en) * | 1985-11-15 | 1987-05-29 | Kobe Steel Ltd | Intake air regulating device for displacement type compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01114996U (en) | 1989-08-02 |
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