JPH0159439B2 - - Google Patents
Info
- Publication number
- JPH0159439B2 JPH0159439B2 JP56095296A JP9529681A JPH0159439B2 JP H0159439 B2 JPH0159439 B2 JP H0159439B2 JP 56095296 A JP56095296 A JP 56095296A JP 9529681 A JP9529681 A JP 9529681A JP H0159439 B2 JPH0159439 B2 JP H0159439B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- compressor
- reservoir
- valve
- oil separator
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、回転形圧縮機の容量制御装置に係
り、さらに詳しくは回転形圧縮機の容量制御装置
中のオイルセパレータが無負荷状態になつたとき
に、オイルセパレータの圧力を大気に放出する
際、圧縮機吸入口側が真空になり、回転形圧縮機
特有の音を発生するが、かかる音の発生を防止す
るために放気配管と圧縮機入口配管に接続された
負圧緩和配管部分の改良に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a capacity control device for a rotary compressor, and more particularly, to a capacity control device for a rotary compressor when an oil separator in the capacity control device is in an unloaded state. When the oil separator pressure is released to the atmosphere, a vacuum is created on the compressor suction side, producing the noise characteristic of rotary compressors. This article relates to improvements to the negative pressure relief piping connected to the machine inlet piping.
第１図に従来装置としての油冷式スクリユー圧
縮機の容量制御装置を示す。
FIG. 1 shows a conventional capacity control device for an oil-cooled screw compressor.
この第１図に示される従来装置は、空気吸込口
１、吸込絞り弁２、圧縮機入口配管３、圧縮機
４、圧縮機出口配管５、オイルセパレータ６、圧
縮空気の調圧弁７、圧縮空気の吐出管８、オイル
セパレータ用の圧力スイツチ９、放気弁１０、放
気配管１１、負圧緩和配管１２、オイルセパレー
タ６の調圧弁１３とを有している。 The conventional device shown in FIG. , a pressure switch 9 for the oil separator, a discharge valve 10, a discharge pipe 11, a negative pressure relief pipe 12, and a pressure regulating valve 13 for the oil separator 6.
そして、需要先の空気使用量が減少し、オイル
セパレータ６内の圧力が上昇したとき、圧力スイ
ツチ９が作動し、放気弁１０が開かれるととも
に、オイルセパレータ６に連結された図示省略の
操作配管により吸込絞り弁２が全閉される。 Then, when the amount of air used by the demand destination decreases and the pressure inside the oil separator 6 increases, the pressure switch 9 is activated and the release valve 10 is opened, and an operation (not shown) connected to the oil separator 6 is operated. The suction throttle valve 2 is completely closed by the piping.
前記吸込絞り弁２が全閉とされ、圧縮機吸入口
側が真空になると回転形圧縮機特有の音が発生す
るが、放気配管１１から分岐された負圧緩和配管
１２を通じて圧縮機入口配管３にオイルセパレー
タ６の圧力の一部が導入され、負圧が緩和される
結果、前記音の発生が防止される。 When the suction throttle valve 2 is fully closed and the compressor suction side becomes vacuum, a sound peculiar to a rotary compressor is generated. A part of the pressure of the oil separator 6 is introduced into the tank, and as a result of the negative pressure being relaxed, the generation of the sound is prevented.
前述の従来装置によれば、無負荷時に圧縮機吸
入口側の負圧を緩和できるので、回転形圧縮機特
有の音の防止に対しては効果があるが、アンロー
ダ特性、すなわち圧縮機の消費動力に対して逆効
果であつて、負圧を緩和しない場合に比較してア
ンローダ特性が悪い。
According to the conventional device described above, the negative pressure on the compressor suction side can be alleviated when there is no load, so it is effective in preventing the noise peculiar to rotary compressors, but the unloader characteristics, that is, the consumption of the compressor This has the opposite effect on power, and the unloader characteristics are worse than when the negative pressure is not alleviated.
本発明の目的は、前記従来装置の欠点をなく
し、無負荷時に発生する回転形圧縮機特有の音の
発生を防止しかつアンローダ特性を向上しうる回
転形圧縮機の容量制御装置を提供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a capacity control device for a rotary compressor that can eliminate the drawbacks of the conventional devices, prevent the generation of noise peculiar to a rotary compressor that occurs during no-load conditions, and improve unloader characteristics. be.
本発明は、上記目的を達成するため、回転形圧
縮機の吸込側に配置された吸込絞り弁と、前記圧
縮機の吐出側に配置された圧力溜めと、前記圧縮
機の吸込側に気体を送入すべく前記吸込絞り弁と
回転形圧縮機との間の吸込側に連絡された負圧緩
和配管とを有し、前記圧力溜めの圧力が設定圧力
を超えたとき、前記吸込絞り弁を閉じるとともに
前記圧力溜めの圧力を大気に放出して無負荷運転
を行うものにおいて、前記負圧緩和配管の途中に
弁が配置され、この弁は、無負荷運転に入つたと
き全開しており、前記圧力溜めの圧力が所定の圧
力以下になつたとき全開する特性に設定したこと
を特徴とする。
In order to achieve the above object, the present invention includes a suction throttle valve disposed on the suction side of a rotary compressor, a pressure reservoir disposed on the discharge side of the compressor, and a gas inlet on the suction side of the compressor. and a negative pressure relief pipe connected to the suction side between the suction throttle valve and the rotary compressor, and when the pressure in the pressure reservoir exceeds a set pressure, the suction throttle valve is activated. In a device that performs no-load operation by releasing the pressure of the pressure reservoir to the atmosphere when closing, a valve is disposed in the middle of the negative pressure relief piping, and this valve is fully open when starting no-load operation, It is characterized in that the pressure reservoir is set to be fully opened when the pressure in the pressure reservoir falls below a predetermined pressure.
上記構成とすることにより、本発明によれば、
以下の作用により、上記目的が達成される。
According to the present invention, with the above configuration,
The above objective is achieved by the following actions.
本発明の発明者等は実験の結果、圧力溜め（オ
イルセパレータ）の無負荷状態において吸込絞り
弁を全閉にし圧力溜め（オイルセパレータ）の圧
力を大気に放出する際、圧力溜め（オイルセパレ
ータ）の圧力が一定圧力、すなわち５Kg／cm2Ｇ程
度までは圧縮機入口側の負圧を緩和しないと回転
圧縮機特有の音を発生するが、それ以下になると
負圧を緩和しなくとも音を発生しなくなることを
確認し、本発明に至つたものである。 As a result of experiments, the inventors of the present invention have found that when the suction throttle valve is fully closed and the pressure of the pressure reservoir (oil separator) is released to the atmosphere when the pressure reservoir (oil separator) is under no load, the pressure reservoir (oil separator) When the pressure reaches a certain level, that is, about 5 kg/cm 2 G, unless the negative pressure on the compressor inlet side is alleviated, the noise typical of a rotary compressor will be generated, but below that, the noise will be generated even if the negative pressure is not alleviated. It was confirmed that this phenomenon no longer occurs, leading to the present invention.
つまり、回転圧縮機のアンロード時において、
吐出圧と吸入圧の差圧が大きいと、例えばスクリ
ユー圧縮機の雄ロータと雌ロータとの間の回転変
動が発生する。特に従動側の雌ロータの変動が激
しくなつてロータ同志が接触し、アンロード時に
のみ特有の異音が発生する。しかし、吐出圧と吸
入圧の差圧が小さくなれば、すなわち圧力溜めの
圧力（吐出圧）が低くなれば、そのような回転変
動が小さくなつて異音の発生がなくなるものと考
えられる。 In other words, when unloading the rotary compressor,
If the differential pressure between the discharge pressure and the suction pressure is large, rotational fluctuations will occur, for example, between the male and female rotors of the screw compressor. In particular, the fluctuations of the female rotor on the driven side become so intense that the rotors come into contact with each other, and a peculiar noise is generated only during unloading. However, it is thought that if the differential pressure between the discharge pressure and the suction pressure becomes smaller, that is, if the pressure in the pressure reservoir (discharge pressure) becomes lower, such rotational fluctuations will become smaller and the generation of abnormal noise will disappear.
したがつて、本発明によれば、圧力溜めの圧力
が所定圧以下に低下するまでは、負圧緩和配管の
弁が開いて吸入側の負圧が緩和され、その間の異
音発生が防止される。また、圧力溜めの圧力が異
音発生しない所定圧以下に低下したときは、上記
弁が閉じて負圧緩和気体の流入が止まるので、圧
縮作用がなくなり、動力の消費が十分に軽減され
るから、アンローダ特性が向上される。 Therefore, according to the present invention, the valve of the negative pressure relief piping is opened to relieve the negative pressure on the suction side until the pressure in the pressure reservoir falls below a predetermined pressure, and the generation of abnormal noise is prevented during that time. Ru. In addition, when the pressure in the pressure reservoir drops below a predetermined pressure that does not cause abnormal noise, the above valve closes and the inflow of negative pressure relief gas is stopped, so the compression action is eliminated and power consumption is sufficiently reduced. , the unloader characteristics are improved.
以下、本発明を図面に基づいて説明する。 Hereinafter, the present invention will be explained based on the drawings.
第２図は本発明の回転形圧縮機の容量制御装置
の一実施例を示す。 FIG. 2 shows an embodiment of a capacity control device for a rotary compressor according to the present invention.
この第２図に示される回転形圧縮機の容量制御
装置は、空気吸込口１、吸込絞り弁２、圧縮機入
口配管３、圧縮機４、圧縮機出口配管５、圧力溜
めたとえばオイルセパレータ６、圧縮空気の調圧
弁７、同吐出管８、圧力溜め（オイルセパレー
タ）用の圧力スイツチ９、放気弁１０、放気配管
１１、負圧緩和配管１２、圧力溜め（オイルセパ
レータ）用の調圧弁１３とを備えている。 The capacity control device for a rotary compressor shown in FIG. Pressure regulating valve 7 for compressed air, discharge pipe 8, pressure switch 9 for pressure reservoir (oil separator), air release valve 10, air discharge piping 11, negative pressure relief piping 12, pressure regulating valve for pressure reservoir (oil separator) It is equipped with 13.
そして、空気吸込口１より吸込絞り弁２を経由
して空気が吸引され、圧縮機入口配管３側と大気
圧との差圧により吸込絞り弁２の開度が調節さ
れ、吸込空気が圧縮機４の中に吸い込まれ、圧縮
機４の雄、雌ロータ（図示省略）の噛み合いによ
つて所定の吐出圧力まで昇圧される。 Then, air is sucked from the air suction port 1 via the suction throttle valve 2, and the opening degree of the suction throttle valve 2 is adjusted by the differential pressure between the compressor inlet pipe 3 side and the atmospheric pressure, and the suction air is transferred to the compressor. The compressor 4 is sucked into the compressor 4, and the pressure is increased to a predetermined discharge pressure by the engagement of the male and female rotors (not shown) of the compressor 4.
圧縮機４の昇圧された圧縮空気は、圧縮機出口
配管５を経て圧力溜め（オイルセパレータ）６に
送られ、圧力溜め（オイルセパレータ）６から調
圧弁７を経由して吐出管８より吐出される。 The pressurized compressed air from the compressor 4 is sent to a pressure reservoir (oil separator) 6 through a compressor outlet pipe 5, and is discharged from the pressure reservoir (oil separator) 6 from a pressure regulating valve 7 through a discharge pipe 8. Ru.
また、圧縮空気の需要先側の空気使用量に応じ
て吸込絞り弁２の絞り量が調節され、圧縮機４の
吸込空気量が制御され、容量制御が行われる。 Further, the throttle amount of the suction throttle valve 2 is adjusted according to the amount of air used by the compressed air demand side, and the amount of air sucked into the compressor 4 is controlled, thereby performing capacity control.
さらに、需要先の空気使用量が減少し、圧力溜
め（オイルセパレータ）６内の圧力が上昇する
と、圧力スイツチ９により検出され、該圧力スイ
ツチ９により放気弁１０が開かれるとともに、圧
力溜め（オイルセパレータ）６に接続された操作
配管（図示省略）により吸込絞り弁２が全開され
る。 Furthermore, when the amount of air used by the demand destination decreases and the pressure in the pressure reservoir (oil separator) 6 increases, it is detected by the pressure switch 9, and the pressure switch 9 opens the air release valve 10, and the pressure reservoir (oil separator) The suction throttle valve 2 is fully opened by an operation pipe (not shown) connected to the oil separator 6.
その結果、圧力溜め（オイルセパレータ）６の
圧力は、放気弁１０、放気配管１１、調圧弁１３
を通つて大気に放出される。 As a result, the pressure in the pressure reservoir (oil separator) 6 is reduced to
is released into the atmosphere through
また、圧力溜め（オイルセパレータ）６の無負
荷状態において前記調圧弁１３により圧力溜め
（オイルセパレータ）６内の圧力が、給油配管
（図示省略）を経由して圧縮機４へ給油するため
に必要な最低油圧に保持される。 In addition, when the pressure reservoir (oil separator) 6 is under no load, the pressure inside the pressure reservoir (oil separator) 6 is increased by the pressure regulating valve 13, which is necessary for supplying oil to the compressor 4 via an oil supply pipe (not shown). The oil pressure is maintained at the minimum oil pressure.
さらに、吸込絞り弁２の全閉状態において放気
配管１１、負圧緩和配管１２を通じて圧縮機入口
配管３に圧力溜め（オイルセパレータ）６の圧力
の一部が導入され、圧縮機入口側の負圧が緩和さ
れ、回転形圧縮機特有の音の発生が防止される。 Furthermore, when the suction throttle valve 2 is fully closed, part of the pressure in the pressure reservoir (oil separator) 6 is introduced into the compressor inlet pipe 3 through the air discharge pipe 11 and the negative pressure relief pipe 12, and the The pressure is relieved, and the noise characteristic of rotary compressors is prevented.
本発明は、前述のごとき回転形圧縮機の容量制
御装置において、圧力溜め（オイルセパレータ）
６と空気吸込口間に接続された放気配管１１の途
中から圧縮機入口配管３に分岐された前記負圧緩
和配管１２に、リリーフ弁１４が設けられている
ところに特徴を有する。 The present invention provides a capacity control device for a rotary compressor as described above, in which a pressure reservoir (oil separator)
The compressor is characterized in that a relief valve 14 is provided in the negative pressure relief pipe 12 that branches to the compressor inlet pipe 3 from the middle of the air discharge pipe 11 connected between the compressor inlet pipe 6 and the air suction port.
前記リリーフ弁１４は、圧力溜め（オイルセパ
レータ）６が設定圧力以下になつたときに閉じる
ように構成されている。すなわち、リリーフ弁１
４は圧力溜め（オイルセパレータ）６の無負荷状
態において吸込絞り弁２を全閉にし、圧力溜め
（オイルセパレータ）６の圧力を大気に放出する
際に、圧縮機入口側の負圧を緩和しなくとも回転
圧縮機特有の音を発生しない圧力たる５Kg／cm2Ｇ
程度以下になつたとき、閉じるようになつてい
る。 The relief valve 14 is configured to close when the pressure in the pressure reservoir (oil separator) 6 falls below a set pressure. That is, relief valve 1
4 fully closes the suction throttle valve 2 when the pressure reservoir (oil separator) 6 is under no load, and relieves the negative pressure on the compressor inlet side when releasing the pressure of the pressure reservoir (oil separator) 6 to the atmosphere. At least 5Kg/cm 2 G, which is the pressure that does not generate the sound peculiar to rotary compressors.
It is designed to close when the temperature drops below that level.
前記実施例の容量制御装置では、オイルセパレ
ータ６の無負荷状態において吸込絞り弁２を全閉
にし、圧力溜め（オイルセパレータ）６の圧力を
大気に放出する際、圧力溜め（オイルセパレー
タ）６の圧力がリリーフ弁１４の設定圧力を越え
ている状態ではリリーフ弁１４が開いており、し
たがつて放気配管１１、負圧緩和配管１２を通じ
て圧縮機入口配管３にオイルセパレータ６の圧力
の一部が導入され、圧縮機入口側の負圧が緩和さ
れ、回転形圧縮機特有の音の発生が防止される。 In the capacity control device of the embodiment, when the suction throttle valve 2 is fully closed and the pressure in the pressure reservoir (oil separator) 6 is released to the atmosphere when the oil separator 6 is under no load, the pressure in the pressure reservoir (oil separator) 6 is When the pressure exceeds the set pressure of the relief valve 14, the relief valve 14 is open, and therefore a part of the pressure of the oil separator 6 is transferred to the compressor inlet pipe 3 through the air discharge pipe 11 and the negative pressure relief pipe 12. is introduced, the negative pressure on the compressor inlet side is alleviated, and the generation of noise peculiar to rotary compressors is prevented.
続いて圧力溜め（オイルセパレータ）６の圧力
が放出され、その圧力がリリーフ弁１４の設定圧
力以上になると、最早圧縮機入口側の負圧を緩和
しなくとも回転形圧縮機特有の音が発生しなくな
り、この段階でリリーフ弁１４が閉じ、圧力溜め
（オイルセパレータ）６の圧力が圧縮機入口配管
３に流れず、圧縮機入口側が高真空となり、圧力
溜め（オイルセパレータ）６側からの空気をバイ
パスさせないため、空気の再圧縮がなくなり、し
たがつて圧縮機消費動力の低下、つまりアンロー
ダ特性を向上しうる。 Subsequently, the pressure in the pressure reservoir (oil separator) 6 is released, and when the pressure exceeds the set pressure of the relief valve 14, the sound characteristic of rotary compressors is generated even if the negative pressure on the compressor inlet side is no longer relieved. At this stage, the relief valve 14 closes, and the pressure in the pressure reservoir (oil separator) 6 does not flow to the compressor inlet piping 3, and the compressor inlet side becomes a high vacuum, causing air to flow from the pressure reservoir (oil separator) 6 side. Since the air is not bypassed, there is no need to recompress the air, thereby reducing compressor power consumption and improving unloader characteristics.
第３図に従来装置と本発明とのアンローダ特性
を比較して示す。 FIG. 3 shows a comparison of the unloader characteristics of the conventional device and the present invention.
この特性において従来装置のアンローダ特性は
（）で示され、本発明のアンローダ特性は（）
で示されるようになる。そして、本発明によれば
ハツチングが施されている△CDEに相当する分
だけ、圧縮機消費電力を低減しうることが理解さ
れる。 In this characteristic, the unloader characteristic of the conventional device is shown by (), and the unloader characteristic of the present invention is shown by ()
It will be shown as It is understood that according to the present invention, the compressor power consumption can be reduced by an amount corresponding to the hatched ΔCDE.
なお、本発明は圧縮機入口側が負圧になつたと
きに音を発生する回転形圧縮機一般に適用できる
ものである。 The present invention can be applied to rotary compressors in general that generate noise when the compressor inlet side becomes negative pressure.
本発明は、以上説明した構成、作用のもので、
本発明によれば負圧緩和配管に設けられかつ設定
圧力以下になつたときに閉じるリリーフ弁の作用
により、圧力溜めの無負荷状態において吸込絞り
弁を閉じ、圧力溜めの圧力を大気に放出するとき
の回転形圧縮機特有の音の発生を防止でき、しか
もアンローダ特性の向上を図りうる効果がある。
The present invention has the configuration and operation described above,
According to the present invention, the suction throttle valve is closed in the no-load state of the pressure reservoir by the action of the relief valve that is provided in the negative pressure relief piping and closes when the pressure drops below the set pressure, and the pressure in the pressure reservoir is released to the atmosphere. This has the effect of preventing the generation of noise peculiar to rotary compressors and improving the unloader characteristics.
第１図は従来装置を示す系統図、第２図は本発
明の一実施例を示す系統図、第３図は従来装置と
本発明装置とのアンローダ特性の比較線図であ
る。
１……空気吸込口、２……吸込絞り弁、３……
圧縮機入口配管、４……圧縮機、５……圧縮機出
口配管、６……オイルセパレータ、９……圧力ス
イツチ、１０……放気弁、１１……放気配管、１
２……負圧緩和配管、１３……オイルセパレータ
の調圧弁、１４……負圧緩和配管に設けられたリ
リーフ弁。
FIG. 1 is a system diagram showing a conventional device, FIG. 2 is a system diagram showing an embodiment of the present invention, and FIG. 3 is a comparison diagram of unloader characteristics between the conventional device and the device of the present invention. 1... Air suction port, 2... Suction throttle valve, 3...
Compressor inlet piping, 4... Compressor, 5... Compressor outlet piping, 6... Oil separator, 9... Pressure switch, 10... Air release valve, 11... Air release piping, 1
2... Negative pressure relief piping, 13... Oil separator pressure regulating valve, 14... Relief valve provided in the negative pressure relief piping.
Claims (1)
弁と、前記圧縮機の吐出側に配置された圧力溜め
と、前記圧縮機の吸込側に気体を送入すべく前記
吸込絞り弁と回転形圧縮機との間の吸込側に連絡
された負圧緩和配管とを有し、前記圧力溜めの圧
力が設定圧力を超えたとき、前記吸込絞り弁を閉
じるとともに前記圧力溜めの圧力を大気に放出し
て無負荷運転を行うものにおいて、前記負圧緩和
配管の途中に弁が配置され、この弁は、無負荷運
転に入つたとき全開しており、前記圧力溜めの圧
力が所定の圧力以下になつたとき全閉する特性に
設定されたものであることを特徴とする回転形圧
縮機の容量制御装置。 ２ 特許請求の範囲第１項に記載のものにおい
て、前記弁は、１次側に作用する圧力が前記所定
の圧力を超えている状態では開き、前記所定の圧
力以下では閉じる特性のリリーフである回転形圧
縮機の容量制御装置。[Claims] 1. A suction throttle valve disposed on the suction side of the rotary compressor, a pressure reservoir disposed on the discharge side of the compressor, and a pressure reservoir for supplying gas to the suction side of the compressor. A negative pressure relief pipe is connected to the suction side between the suction throttle valve and the rotary compressor, and when the pressure in the pressure reservoir exceeds a set pressure, the suction throttle valve is closed and the pressure is reduced. In a device that performs no-load operation by releasing the pressure in the reservoir to the atmosphere, a valve is disposed in the middle of the negative pressure relief piping, and this valve is fully open when the no-load operation begins, and the pressure in the pressure reservoir is 1. A capacity control device for a rotary compressor, characterized in that the device is set to completely close when the pressure falls below a predetermined pressure. 2. In the item set forth in claim 1, the valve is a relief that opens when the pressure acting on the primary side exceeds the predetermined pressure and closes when the pressure is below the predetermined pressure. Capacity control device for rotary compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9529681A JPS57212385A (en) | 1981-06-22 | 1981-06-22 | Capacity controlling apparatus for rotary compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9529681A JPS57212385A (en) | 1981-06-22 | 1981-06-22 | Capacity controlling apparatus for rotary compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57212385A JPS57212385A (en) | 1982-12-27 |
| JPH0159439B2 true JPH0159439B2 (en) | 1989-12-18 |
Family
ID=14133804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9529681A Granted JPS57212385A (en) | 1981-06-22 | 1981-06-22 | Capacity controlling apparatus for rotary compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57212385A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4594369B2 (en) * | 2007-11-22 | 2010-12-08 | 株式会社神戸製鋼所 | Low noise type liquid cooling compressor |
| JP2018013099A (en) * | 2016-07-21 | 2018-01-25 | 三井精機工業株式会社 | compressor |
| DE102016011495A1 (en) * | 2016-09-21 | 2018-03-22 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Screw compressor for a commercial vehicle |
| BE1027005B9 (en) * | 2019-01-30 | 2020-10-19 | Atlas Copco Airpower Nv | Method of controlling a compressor to an unloaded state |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351513A (en) * | 1976-10-20 | 1978-05-11 | Tokico Ltd | Volume type rotary fluid pressure device |
-
1981
- 1981-06-22 JP JP9529681A patent/JPS57212385A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57212385A (en) | 1982-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3837278B2 (en) | Compressor operation method | |
| CN101163887B (en) | System and method for controlling a variable speed compressor during stopping | |
| CN204827931U (en) | Vacuum control device is prevented to screw rod host computer | |
| CS211374B2 (en) | Liquid circling pump with prearranged compressor | |
| CN109477485B (en) | Method and associated pump unit for reducing pressure in a load lock | |
| KR20150118138A (en) | Pumping system | |
| CN111868386A (en) | gas compressor | |
| US2971691A (en) | Pumping system | |
| GB2053358A (en) | Oil-cooled compressor | |
| HK97284A (en) | Rotary compressors | |
| JPH0159439B2 (en) | ||
| JPH0260873B2 (en) | ||
| JPH0148399B2 (en) | ||
| JP6997648B2 (en) | Compressor system | |
| JP6940686B2 (en) | Gas compressor | |
| US3341111A (en) | Automatically controlled drain valve | |
| WO2022044862A1 (en) | Air compressor | |
| CN209908762U (en) | Dry screw rod frequency conversion air compressor | |
| JP5422431B2 (en) | Control method of fluid compressor and fluid compressor | |
| JP4092040B2 (en) | Screw compressor | |
| CN115435014A (en) | Air supply assembly and compressor | |
| CN212028554U (en) | Loading regulating valve | |
| JP4608289B2 (en) | Operation control method of screw compressor | |
| JP2005351169A (en) | Screw compressor and its operation control system | |
| JP3754552B2 (en) | Compressor control circuit |