JP2018178944A - Method of adjusting suction amount of ejector, and ejector using the same - Google Patents

Method of adjusting suction amount of ejector, and ejector using the same Download PDF

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JP2018178944A
JP2018178944A JP2017083085A JP2017083085A JP2018178944A JP 2018178944 A JP2018178944 A JP 2018178944A JP 2017083085 A JP2017083085 A JP 2017083085A JP 2017083085 A JP2017083085 A JP 2017083085A JP 2018178944 A JP2018178944 A JP 2018178944A
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ejector
outflow
suction
sectional area
cross
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俊彦 江口
Toshihiko Eguchi
俊彦 江口
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AURA TEC KK
Aura Tec Co Ltd
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AURA TEC KK
Aura Tec Co Ltd
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Priority to JP2017083085A priority Critical patent/JP2018178944A/en
Priority to PCT/JP2018/012349 priority patent/WO2018193795A1/en
Publication of JP2018178944A publication Critical patent/JP2018178944A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

PROBLEM TO BE SOLVED: To miniaturize a device including an ejector by dispensing with a flow adjustment valve mounted on a suction fluid introduction pipe connected to the ejector for adjusting a suction amount of a fluid.SOLUTION: In an ejector in which an inflow portion 1 which is formed into the tubular shape and in which liquid of high pressure flows, and an outflow portion 2 from which the liquid flows out, are arranged linearly in a longitudinal direction, a throttle portion 3 having a cross-sectional area smaller than a cross-sectional area orthogonal in a longitudinal direction, of the inflow portion 1 and the outflow portion 2 is formed on a connection part of the inflow portion 1 and the outflow portion 2, and a suction fluid introduction pipe 4 free from a flow adjustment valve, for introducing a fluid sucked to the throttle portion 3 is connected so that the throttle portion 3 and the suction fluid introduction pipe 4 are communicated, a diameter-reduced portion 5 smaller than the cross-sectional area of the outflow portion 2 according to a suction amount of the fluid, is disposed at a water discharge side of the outflow portion 2. A baffle plate for blocking flow of the liquid discharged from the diameter-reduced portion 5 may be disposed at a downstream side of the diameter-reduced portion 5.SELECTED DRAWING: Figure 1

Description

本発明は、液体が流れる際の自吸効果を利用し、液体中に液体または気体等の流体を吸入させるエジェクタにおいて、吸入する流体を供給する吸入流体導入管に流量調整弁を用いないエジェクタの吸入量の調整方法およびその方法に使用するエジェクタに関する。   The present invention is an ejector for taking in a fluid such as liquid or gas into a liquid by utilizing a self-priming effect when the liquid flows, the ejector not using a flow control valve in a suction fluid introducing pipe for supplying a fluid to be sucked. The present invention relates to a method of adjusting a suction amount and an ejector used for the method.

マイクロバブル吐水ノズル（特許文献１）、液注入ノズル（特許文献２）、マイクロバブル発生装置（特許文献３）、水素水製造装置（特許文献４）、便器洗浄装置（特許文献５）にエジェクタが利用され、エジェクタは、液体が流れる際の自吸効果を利用して液体中に流体が吸入される。   Ejector is used for micro bubble water discharge nozzle (patent document 1), liquid injection nozzle (patent document 2), micro bubble generator (patent document 3), hydrogen water production apparatus (patent document 4), toilet bowl cleaning apparatus (patent document 5) The ejector is used, and the fluid is sucked into the liquid utilizing the self-priming effect when the liquid flows.

図３において、一般的なベンチュリータイプのエジェクタは、管状に形成されるとともに、高圧の液体が流入する流入部１と、液体を流出する流出部２が長手方向に直線状に配置され、流入部１と流出部２との結合部分には、流入部１および流出部２の断面積よりも小さい断面積を有する絞り部３が形成されている。絞り部３には吸入される流体を導入する吸入流体導入管４が連通している。   In FIG. 3, a general Venturi type ejector is formed into a tubular shape, and an inflow portion 1 into which a high pressure liquid flows in and an outflow portion 2 from which the liquid flows out are linearly arranged in the longitudinal direction, and the inflow portion At the joint portion between 1 and the outflow portion 2, a throttle portion 3 having a cross-sectional area smaller than that of the inflow portion 1 and the outflow portion 2 is formed. The throttling portion 3 is in communication with a suction fluid introduction pipe 4 for introducing a fluid to be sucked.

図３中のＦ１は絞り部の断面、Ｆ２は流出部の断面を示し、吸入流体導入管４には、流量調整手段として流量調整弁（図示せず）を備え、流量調整弁を調整して一定量の流体を吸入させる。   F1 in FIG. 3 shows a cross section of the throttling part, F2 shows a cross section of the outflow part, and the suction fluid inlet pipe 4 is provided with a flow control valve (not shown) as a flow control means. Inhale a certain amount of fluid.

前記の構成により、流入部１から流入した液体が絞り部３を介して流出部２へと噴出される際に、絞り部３に負圧が生じ、いわゆるベンチュリー管現象によって吸入流体導入管４から絞り部３に流体が吸入されて、エジェクタを流れる液体に混合される。   With the above configuration, when the liquid flowing from the inflow portion 1 is ejected to the outflow portion 2 through the throttling portion 3, a negative pressure is generated in the throttling portion 3, and a so-called Venturi tube phenomenon causes The fluid is drawn into the throttling unit 3 and mixed with the fluid flowing through the ejector.

特開２００１−０５８１４２号公報（図１）Unexamined-Japanese-Patent No. 2001-058142 (FIG. 1) 特開２００７−２９６４８６号公報（図１）Unexamined-Japanese-Patent No. 2007-296486 (FIG. 1) 特開２００６−１６７６１２号公報（図４）Unexamined-Japanese-Patent No. 2006-167612 (FIG. 4) 特開２０１６−１５５０８０号公報（図５）Unexamined-Japanese-Patent No. 2016-155080 (FIG. 5) 特開２０１２−１０７３９０号公報（図１）JP 2012-107390 A (FIG. 1)

前記特許文献に記載されたエジェクには、吸入される流体を導入する吸入流体導入管に流体の吸入量を調整するために流量調整弁が取り付けられており、そのため装置が大型化するとともに、構造が複雑になっていた。   In the ejector described in the patent document, a flow control valve is attached to a suction fluid introduction pipe for introducing a fluid to be suctioned in order to adjust the amount of suction of the fluid, so the device becomes larger and the structure Was getting complicated.

そこで、本発明は、流体の吸入量を調整するためにエジェクタに接続されている吸入流体導入管に取り付けられる流量調整弁をなくしても注入量調整を可能にすることでエジェクタを備えた装置をコンパクト化出来るエジェクタの吸入量の調整方法およびその方法に使用するエジェクタを提供するものである。   Therefore, the present invention provides a device equipped with an ejector by enabling injection amount adjustment even without the flow control valve attached to the suction fluid introduction pipe connected to the ejector to adjust the suction amount of fluid. Abstract: A method of adjusting a suction amount of an ejector that can be made compact and an ejector used for the method.

本願請求項１の発明は、高圧の液体が流入する流入部と、液体を流出する流出部が管状に形成されるとともに、長手方向に直線状に配置され、前記流入部と前記流出部の結合部分に前記流入部および前記流出部の長手方向に直交する断面積よりも小さい断面積を有する絞り部が形成され、前記絞り部に吸入される流体を導入する、流量調整弁を備えない吸入流体導入管が接続されるとともに、前記絞り部と前記吸入流体導入管が連通しているエジェクタの吸入量の調整方法において、前記流出部の吐水側の断面積を前記流出部の前記断面積よりも設定された前記流体の吸入量に応じて小さくすることを特徴とするエジェクタの吸入量の調整方法である。   According to the invention of claim 1 of the present application, the inflow portion into which the high pressure liquid flows in and the outflow portion from which the liquid flows out are formed in a tubular shape, and are arranged linearly in the longitudinal direction, and the connection of the inflow portion and the outflow portion A suction portion having a cross-sectional area smaller than a cross-sectional area orthogonal to the longitudinal direction of the inflow portion and the outflow portion is formed in the portion, and a suction flow fluid without a flow control valve is introduced In the adjustment method of the suction amount of the ejector in which the introduction pipe is connected and the throttling portion and the suction fluid introduction pipe are in communication, the cross-sectional area on the water discharge side of the outflow portion is greater than the cross-sectional area of the outflow portion According to another aspect of the present invention, there is provided a method of adjusting a suction amount of an ejector, wherein the amount is reduced according to a set suction amount of the fluid.

本願請求項２の発明は、高圧の液体が流入する流入部と、液体を流出する流出部が管状に形成されるとともに、長手方向に直線状に配置され、前記流入部と前記流出部の結合部分に前記流入部および前記流出部の長手方向に直交する断面積よりも小さい断面積を有する絞り部が形成され、前記絞り部に吸入される流体を導入する、流量調整弁を備えない吸入流体導入管が接続されるとともに、前記絞り部と前記吸入流体導入管が連通しているエジェクタにおいて、前記流出部の吐水側に前記流出部の前記断面積よりも断面積を設定された前記流体の吸入量に応じて小さくした縮径部が設けられていることを特徴とするエジェクタである。   According to the invention of claim 2 of the present application, the inflow portion into which the high pressure liquid flows in and the outflow portion from which the liquid flows out are formed in a tubular shape and are linearly arranged in the longitudinal direction, and the connection of the inflow portion and the outflow portion A suction portion having a cross-sectional area smaller than a cross-sectional area orthogonal to the longitudinal direction of the inflow portion and the outflow portion is formed in the portion, and a suction flow fluid without a flow control valve is introduced In an ejector to which an inlet pipe is connected and the narrowed portion and the suction fluid inlet pipe communicate with each other, the water discharge side of the outflow portion has a cross-sectional area set more than the cross-sectional area of the outflow portion It is an ejector characterized in that a reduced diameter portion which is reduced according to the amount of suction is provided.

本願請求項３の発明は、前記縮径部の下流に前記縮径部から吐水される液体の流れを遮る邪魔板を配置したことを特徴とする請求項２に記載のエジェクタである。   The invention according to claim 3 of the present application is the ejector according to claim 2, characterized in that a baffle plate for blocking the flow of liquid discharged from the reduced diameter portion is disposed downstream of the reduced diameter portion.

本発明のエジェクタは、吐水側を縮流させることにより背圧（バックプレッシャー）を与え、背圧を加減することにより吸入する流体の吸入量を調整するので、吸入流体導入管に流量調整弁を設ける必要がなく、エジェクタを含む装置をコンパクトすることが可能になる。   Since the ejector of the present invention applies a back pressure (back pressure) by contracting the water discharge side and adjusts the suction amount of the fluid to be sucked by adjusting the back pressure, the flow control valve is installed in the suction fluid introduction pipe. There is no need to provide it, and it becomes possible to make the device including the ejector compact.

また、吸入流体導入管に流量調整弁を設ける必要がないので、組立が簡単になるとともに、製造コストを低減させることができる。   In addition, since it is not necessary to provide a flow control valve in the suction fluid inlet pipe, the assembly can be simplified and the manufacturing cost can be reduced.

エジェクタに本発明を組み入れたエジェクタの構造を示す図である。It is a figure which shows the structure of the ejector which integrated this invention in the ejector. 本発明の別実施例のエジェクタの構造を示す図である。It is a figure which shows the structure of the ejector of another Example of this invention. 一般的なベンチュリータイプのノズルの概略図である。It is the schematic of a general Venturi type nozzle.

＜実施例１＞
本実施例は、液体が流れる配管途中に配置するエジェクタの例である。図１において、エジェクタは、管状に形成され、高圧の液体が流入する流入部１と、液体を流出する流出部２が長手方向に直線状に配置されている。流入部１と流出部２との結合部分に流入部１および２流出部の長手方向に直交する断面積Ｆ２よりも小さい断面積Ｆ１を有する絞り部３が形成されている。 Example 1
A present Example is an example of the ejector arrange | positioned in piping which a liquid flows. In FIG. 1, the ejector is formed in a tubular shape, and an inflow portion 1 into which a high pressure liquid flows in and an outflow portion 2 from which the liquid flows out are disposed linearly in the longitudinal direction. A throttling portion 3 having a cross-sectional area F1 smaller than the cross-sectional area F2 orthogonal to the longitudinal direction of the inflow portions 1 and 2 is formed at the connection portion between the inflow portion 1 and the outflow portion 2.

絞り部３には、吸入される流体を導入する吸入流体導入管４が接続され、吸入流体導入管４は絞り部３に連通している。本発明では、吸入流体導入管４に流量調整弁を備えないのが特徴である。   A suction fluid introducing pipe 4 for introducing a fluid to be sucked is connected to the throttling portion 3, and the suction fluid introducing pipe 4 is in communication with the throttling portion 3. The present invention is characterized in that the suction fluid inlet pipe 4 is not provided with a flow control valve.

吸入流体導入管４に流量調整弁を設けないため、本発明では、流出部２の吐水側に、設定された前記流体の吸入量に応じて流出部２の内径より小さい径に縮径して縮径部５を設け、縮径部５の断面積Ｆ２’を流出部２の断面積Ｆ２よりも小さくする。   In the present invention, the diameter is reduced to a diameter smaller than the inner diameter of the outflow portion 2 according to the suction amount of the fluid set on the water discharge side of the outflow portion 2 because the flow control valve is not provided in the suction fluid introduction pipe 4 The reduced diameter portion 5 is provided, and the cross sectional area F2 'of the reduced diameter portion 5 is smaller than the cross sectional area F2 of the outflow portion 2.

本実施例のエジェクタに高圧の液体を流すと、図１のエジェクタと同様に絞り部３に発生する負圧によって吸入流体導入管４から絞り部３に流体が吸入されるが、絞り部３下流の流出部２の吐水側に設けた縮径部５によってノズル内部の負圧は弱められ、吸入流体導入管４から吸入される流体の量がより少なくなる。   When high-pressure liquid flows in the ejector of this embodiment, the negative pressure generated in the throttling portion 3 as in the ejector of FIG. 1 causes the fluid to be sucked from the suction fluid introduction pipe 4 to the throttling portion 3. The negative pressure inside the nozzle is reduced by the reduced diameter portion 5 provided on the water discharge side of the outflow portion 2, and the amount of fluid sucked from the suction fluid introduction pipe 4 is smaller.

つまり、同一構造のエジェクタの吸入量は絞り部の断面積と縮径部５の断面積の比率によって決まるので、設定された前記流体の吸入量に応じて吐水側の断面比率を変えることで吸入流体導入管４からの吸入量調整が可能となり、その結果、吸入流体導入管４に流量調整弁を設ける必要がなくなる。   That is, since the suction amount of the ejector having the same structure is determined by the ratio of the cross-sectional area of the narrowed portion to the cross-sectional area of the reduced diameter portion 5, the suction side is changed by changing the cross-sectional ratio on the water discharge side according to the set suction amount of the fluid. It is possible to adjust the amount of suction from the fluid introduction pipe 4, and as a result, it is not necessary to provide a flow control valve in the suction fluid introduction pipe 4.

＜実施例２＞
本実施例は、例えば、液体をエジェクタから直接大気中に吐水する場合でも使用可能となるエジェクタである。実施例１のエジェクタのように液体が流れる配管の途中にエジェクタの流入部１と流出部２が接続されて縮径部５の後段に圧力損失を生じるような場合は流出部２の内部は液体で満たされ背圧がかかるため問題はない。 Example 2
This embodiment is, for example, an ejector that can be used even when water is discharged from the ejector directly into the atmosphere. In the case where the inflow part 1 and the outflow part 2 of the ejector are connected in the middle of the piping through which the liquid flows as in the ejector of the first embodiment and a pressure loss occurs in the subsequent stage of the diameter reducing part 5, the liquid in the outflow part 2 is liquid There is no problem because it is filled with pressure and back pressure is applied.

しかしながら、エジェクタの吐水側からそのまま大気中に吐水すると、絞り部３から導入された液体は縮径部５をそのまま抜けていき、流出部２内部は液体で満たされないので、背圧がかからなくなってしまう。このため、エジェクタ効果が得られずに吸入流体導入管４から流体が吸入されなくなる。   However, when water is discharged directly into the air from the water discharge side of the ejector, the liquid introduced from the throttling part 3 passes through the reduced diameter part 5 as it is, and the inside of the outflow part 2 is not filled with liquid, so back pressure disappears It will Therefore, the ejector effect can not be obtained and the fluid can not be sucked from the suction fluid inlet pipe 4.

そこで、エジェクタの吐水側からそのまま大気中に吐水するエジェクタは、図２に示すように、縮径部５の後段に吐水される液体の流れを一旦遮る遮蔽板６を設ける。   Therefore, as shown in FIG. 2, the ejector that discharges water as it is from the water discharge side of the ejector is provided with a shielding plate 6 that temporarily blocks the flow of the discharged water downstream of the reduced diameter portion 5.

遮蔽板６で液体を一旦遮ることにより、流出部２の内部は液体で満たされるので、配管の途中に設置した場合と同じように負圧を生じて流体を吸入させながら、遮蔽板６に形成させた複数の吐水孔７から大気中に吐水させることが可能となる。   Since the inside of the outflow portion 2 is filled with the liquid by shielding the liquid with the shielding plate 6 once, it is formed in the shielding plate 6 while creating a negative pressure and suctioning the fluid as in the case of installing in the middle of the piping. It is possible to discharge water into the atmosphere from the plurality of water discharge holes 7 that have been made.

１：流入部
２：流出部
３：絞り部
４：吸入流体導入管
５：縮径部
６：遮蔽板
７：吐水孔 1: Inflow part 2: Outflow part 3: Throttling part 4: Suction fluid introduction pipe 5: Diameter reduction part 6: Shielding plate 7: Water discharge hole

Claims (3)

高圧の液体が流入する流入部と、液体を流出する流出部が管状に形成されるとともに、長手方向に直線状に配置され、前記流入部と前記流出部の結合部分に前記流入部および前記流出部の長手方向に直交する断面積よりも小さい断面積を有する絞り部が形成され、 前記絞り部に吸入される流体を導入する、流量調整弁を備えない吸入流体導入管が接続されるとともに、前記絞り部と前記吸入流体導入管が連通しているエジェクタの吸入量の調整方法において、
前記流出部の吐水側の断面積を前記流出部の前記断面積よりも設定された前記流体の吸入量に応じて小さくすることを特徴とするエジェクタの吸入量の調整方法。 An inflow portion into which the high pressure liquid flows in and an outflow portion which discharges the liquid are formed in a tubular shape, and are linearly arranged in the longitudinal direction, and the inflow portion and the outflow are connected to the connection portion of the inflow portion and the outflow portion. A throttling portion having a cross-sectional area smaller than a cross-sectional area orthogonal to the longitudinal direction of the portion is formed, and a suction fluid introducing pipe without a flow control valve is connected to introduce fluid to be sucked into the throttling portion; In the adjustment method of the suction amount of the ejector in which the throttling portion and the suction fluid introduction pipe communicate with each other,
A method of adjusting a suction amount of an ejector, wherein a cross-sectional area on the water discharge side of the outflow portion is smaller than a cross-sectional area of the outflow portion according to a suction amount of the fluid set. 高圧の液体が流入する流入部と、液体を流出する流出部が管状に形成されるとともに、長手方向に直線状に配置され、前記流入部と前記流出部の結合部分に前記流入部および前記流出部の長手方向に直交する断面積よりも小さい断面積を有する絞り部が形成され、前記絞り部に吸入される流体を導入する、流量調整弁を備えない吸入流体導入管が接続されるとともに、前記絞り部と前記吸入流体導入管が連通しているエジェクタにおいて、
前記流出部の吐水側に前記流出部の前記断面積よりも断面積を設定された前記流体の吸入量に応じて小さくした縮径部が設けられていることを特徴とするエジェクタ。 An inflow portion into which the high pressure liquid flows in and an outflow portion which discharges the liquid are formed in a tubular shape, and are linearly arranged in the longitudinal direction, and the inflow portion and the outflow are connected to the connection portion of the inflow portion and the outflow portion. A throttling portion having a cross-sectional area smaller than a cross-sectional area orthogonal to the longitudinal direction of the portion is formed, and a suction fluid introducing pipe without a flow control valve is connected to introduce fluid to be sucked into the throttling portion; In an ejector in which the throttling portion is in communication with the suction fluid introduction pipe,
An ejector characterized in that a reduced diameter portion whose cross-sectional area is set smaller than the cross-sectional area of the outflow portion on the water discharge side of the outflow portion is provided in accordance with the amount of suction of the fluid. 前記縮径部の下流に前記縮径部から吐水される液体の流れを遮る邪魔板を配置したことを特徴とする請求項２に記載のエジェクタ。   The ejector according to claim 2, wherein a baffle plate is disposed downstream of the reduced diameter portion to block the flow of the liquid discharged from the reduced diameter portion.
JP2017083085A 2017-04-19 2017-04-19 Method of adjusting suction amount of ejector, and ejector using the same Pending JP2018178944A (en)

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JP2017083085A JP2018178944A (en) 2017-04-19 2017-04-19 Method of adjusting suction amount of ejector, and ejector using the same
PCT/JP2018/012349 WO2018193795A1 (en) 2017-04-19 2018-03-27 Method for adjusting intake amount of ejector, and ejector used in said method

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JPS5838000U (en) * 1981-09-04 1983-03-11 焼結金属工業株式会社 jet pump
JP2663608B2 (en) * 1989-01-25 1997-10-15 富士電機株式会社 Jet pump
JP2002235700A (en) * 2001-02-11 2002-08-23 Shigeru Matsuo Jet liquid flow nozzle
JP2013019405A (en) * 2011-07-12 2013-01-31 Tadao Hirokawa Pressure fluid energy converting device of jet pump

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