WO2018193795A1

WO2018193795A1 - Method for adjusting intake amount of ejector, and ejector used in said method

Info

Publication number: WO2018193795A1
Application number: PCT/JP2018/012349
Authority: WO
Inventors: 俊彦江口
Original assignee: 株式会社オーラテック
Priority date: 2017-04-19
Filing date: 2018-03-27
Publication date: 2018-10-25
Also published as: JP2018178944A

Abstract

To eliminate a flow regulator that regulates a fluid intake amount and that is attached to an intake fluid introduction tube connected to an ejector, and to make a device comprising the ejector more compact, the present invention provides an ejector in which: an inflow part 1, which is formed into a tube shape and into which a high-pressure fluid flows, and an outflow part 2, through which the fluid flows out, are disposed in a straight line along a longitudinal direction; a throttling part 3, which has a cross-sectional area smaller than the cross-sectional area of the inflow part 1 and outflow part 2 orthogonal to the longitudinal direction, is formed in the portion where the inflow part 1 and the outflow part 2 are joined; an intake fluid introduction tube 4, through which the fluid taken in is introduced and which has no flow regulator, is connected to the throttling part 3; and the intake fluid introduction tube 4 communicates with the throttling part 3, wherein a reduced-diameter part 5, which is reduced in size relative to the cross-sectional area of the outflow part 2 in accordance with the fluid intake amount, is provided to the fluid-discharging side of the outflow part 2. A baffle plate, which blocks the flow of the fluid discharged from the reduced-diameter part 5, can be disposed downstream of the reduced-diameter part 5.

Description

Adjusting method of intake amount of ejector and ejector used for the method

The present invention relates to an ejector that uses a self-priming effect when a liquid flows and sucks a fluid such as a liquid or a gas into the liquid, and does not use a flow rate adjustment valve in a suction fluid introduction pipe that supplies the fluid to be sucked. The present invention relates to a method for adjusting an intake amount and an ejector used for the method.

Ejectors are provided in a micro-bubble water discharge nozzle (Patent Document 1), a liquid injection nozzle (Patent Document 2), a micro-bubble generator (Patent Document 3), a hydrogen water production device (Patent Document 4), and a toilet cleaning device (Patent Document 5). The ejector uses the self-priming effect when the liquid flows, and the fluid is sucked into the liquid.

In FIG. 3, a general venturi-type ejector is formed in a tubular shape, and an inflow portion 1 into which high-pressure liquid flows and an outflow portion 2 from which liquid flows out are arranged linearly in the longitudinal direction. A constricted portion 3 having a cross-sectional area smaller than the cross-sectional areas of the inflow portion 1 and the outflow portion 2 is formed at a joint portion between 1 and the outflow portion 2. A suction fluid introduction pipe 4 for introducing a fluid to be sucked communicates with the throttle portion 3.

In FIG. 3, F1 is a cross section of the throttle portion, F2 is a cross section of the outflow portion, and the suction fluid introduction pipe 4 is provided with a flow rate adjusting valve (not shown) as a flow rate adjusting means. Inhale a certain amount of fluid.

With the above configuration, when the liquid flowing in from the inflow portion 1 is ejected to the outflow portion 2 through the constriction portion 3, a negative pressure is generated in the constriction portion 3, and the so-called Venturi tube phenomenon causes the suction fluid introduction pipe 4 to A fluid is sucked into the throttle unit 3 and mixed with the liquid flowing through the ejector.

Japanese Patent Laid-Open No. 2001-058142 (FIG. 1) Japanese Patent Laying-Open No. 2007-296486 (FIG. 1) Japanese Patent Laying-Open No. 2006-167612 (FIG. 4) Japanese Patent Laying-Open No. 2016-155080 (FIG. 5) JP 2012-107390 A (FIG. 1)

In the eject described in the above-mentioned patent document, a flow rate adjusting valve is attached to the suction fluid introduction pipe for introducing the fluid to be sucked in order to adjust the suction amount of the fluid. Was complicated.

In view of this, the present invention provides an apparatus equipped with an ejector by making it possible to adjust the injection amount without the flow rate adjustment valve attached to the suction fluid introduction pipe connected to the ejector in order to adjust the suction amount of the fluid. The present invention provides a method for adjusting the intake amount of an ejector that can be made compact, and an ejector used for the method.

According to the first aspect of the present invention, the inflow portion into which the high-pressure liquid flows 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 inflow portion and the outflow portion are combined. An intake fluid that does not include a flow rate adjusting valve, in which a throttle portion having a cross-sectional area smaller than the cross-sectional area perpendicular to the longitudinal direction of the inflow portion and the outflow portion is formed in the portion, and introduces the fluid sucked into the throttle portion In the method for adjusting the suction amount of the ejector in which the introduction pipe is connected and the throttle part and the suction fluid introduction pipe communicate with each other, the cross-sectional area on the water discharge side of the outflow part is larger than the cross-sectional area of the outflow part A method of adjusting an intake amount of an ejector, wherein the intake amount is reduced according to a set intake amount of the fluid.

In the invention of claim 2 of the present application, the inflow portion into which the high-pressure liquid flows and the outflow portion from which the liquid flows out are formed in a tubular shape and are arranged in a straight line in the longitudinal direction, and the inflow portion and the outflow portion are combined. An intake fluid that does not include a flow rate adjusting valve, in which a throttle portion having a cross-sectional area smaller than the cross-sectional area perpendicular to the longitudinal direction of the inflow portion and the outflow portion is formed in the portion, and introduces the fluid sucked into the throttle portion In the ejector to which the introduction pipe is connected and the throttle portion and the suction fluid introduction pipe communicate with each other, the fluid whose cross-sectional area is set to be larger than the cross-sectional area of the outflow portion on the water discharge side of the outflow portion. The ejector is characterized in that a reduced diameter portion is provided in accordance with the amount of suction.

The invention of claim 3 of the present application is the ejector according to claim 2, wherein a baffle plate that blocks a flow of liquid discharged from the reduced diameter portion is disposed downstream of the reduced diameter portion.

The ejector of the present invention applies a back pressure (back pressure) by constricting the water discharge side, and adjusts the suction amount of the fluid to be sucked by adjusting the back pressure, so a flow rate adjusting valve is provided in the suction fluid introduction pipe. There is no need to provide the device, and the device including the ejector can be made compact.

Also, since there is no need to provide a flow rate adjusting valve in the suction fluid introduction pipe, assembly is simplified and manufacturing cost can be reduced.

It is a figure which shows the structure of the ejector which incorporated this invention in the ejector. It is a figure which shows the structure of the ejector of another Example of this invention. It is the schematic of a general venturi type nozzle.

<Example 1>
A present Example is an example of the ejector arrange | positioned in the middle of the piping through 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 and an outflow portion 2 from which the liquid flows out are arranged linearly in the longitudinal direction. A constricted portion 3 having a cross-sectional area F1 smaller than a cross-sectional area F2 perpendicular to the longitudinal direction of the

inflow portions

1 and 2 is formed at a joint portion between the inflow portion 1 and the outflow portion 2.

A suction fluid introduction pipe 4 for introducing a fluid to be sucked is connected to the throttle section 3, and the suction fluid introduction pipe 4 communicates with the throttle section 3. The present invention is characterized in that the suction fluid introduction pipe 4 is not provided with a flow rate adjusting valve.

In the present invention, since the flow rate adjusting valve is not provided in the suction fluid introduction pipe 4, the diameter is reduced to a diameter smaller than the inner diameter of the outflow portion 2 on the water discharge side of the outflow portion 2 in accordance with the set suction amount of the fluid. The reduced diameter portion 5 is provided, and the sectional area F2 ′ of the reduced diameter portion 5 is made smaller than the sectional area F2 of the outflow portion 2.

When a high-pressure liquid is allowed to flow through the ejector of the present embodiment, the fluid is sucked into the throttle portion 3 from the suction fluid introduction pipe 4 by the negative pressure generated in the throttle portion 3 as in the ejector of FIG. The negative pressure inside the nozzle is weakened 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 becomes smaller.

In other words, since the suction amount of the ejector having the same structure is determined by the ratio of the cross-sectional area of the throttle portion and the cross-sectional area of the reduced diameter portion 5, the suction ratio can be changed by changing the cross-sectional ratio on the water discharge side in accordance with the set suction amount of the fluid. The amount of suction from the fluid introduction pipe 4 can be adjusted. As a result, it is not necessary to provide a flow rate adjustment valve in the suction fluid introduction pipe 4.

<Example 2>
The present embodiment is an ejector that can be used even when, for example, liquid is discharged directly from the ejector into the atmosphere. When the inflow part 1 and the outflow part 2 of the ejector are connected in the middle of the pipe through which the liquid flows as in the ejector of the first embodiment and a pressure loss occurs in the subsequent stage of the reduced diameter part 5, the inside of the outflow part 2 is liquid. There is no problem because back pressure is applied.

However, when water is discharged from the water discharge side of the ejector into the atmosphere as it is, the liquid introduced from the throttle portion 3 passes through the reduced diameter portion 5 as it is, and the inside of the outflow portion 2 is not filled with liquid, so no back pressure is applied. End up. For this reason, the ejector effect is not obtained, and the fluid is not sucked from the suction fluid introduction pipe 4.

Therefore, as shown in FIG. 2, the ejector that spouts the air as it is from the spout side of the ejector is provided with a shielding plate 6 that temporarily blocks the flow of the liquid that is spouted after the reduced diameter portion 5.

Since the inside of the outflow part 2 is filled with the liquid by blocking the liquid with the shielding plate 6, it is formed on the shielding plate 6 while generating a negative pressure and sucking the fluid in the same manner as when installed in the middle of the pipe. It becomes possible to discharge water into the atmosphere from the plurality of discharged water discharge holes 7.

1: Inflow portion 2: Outflow portion 3: Throttle portion 4: Suction fluid introduction pipe 5: Reduced diameter portion 6: Shield plate 7: Water discharge hole

Claims

An inflow portion into which a high-pressure liquid flows and an outflow portion from which the liquid flows out are formed in a tubular shape and are linearly arranged in the longitudinal direction, and the inflow portion and the outflow portion are connected to a joint portion of the inflow portion and the outflow portion. A throttle part having a cross-sectional area smaller than the cross-sectional area perpendicular to the longitudinal direction of the part is formed, and a suction fluid introduction pipe not having a flow rate adjusting valve for introducing the fluid sucked into the throttle part is connected, In the method for adjusting the intake amount of the ejector in which the throttle portion and the suction fluid introduction pipe communicate with each other,
A method for adjusting an intake amount of an ejector, characterized in that a cross-sectional area on the water discharge side of the outflow portion is made smaller than the cross-sectional area of the outflow portion in accordance with a set intake amount of the fluid.
An inflow portion into which a high-pressure liquid flows and an outflow portion from which the liquid flows out are formed in a tubular shape and are linearly arranged in the longitudinal direction, and the inflow portion and the outflow portion are connected to a joint portion of the inflow portion and the outflow portion. A throttle part having a cross-sectional area smaller than the cross-sectional area perpendicular to the longitudinal direction of the part is formed, and a suction fluid introduction pipe without a flow rate adjustment valve for introducing the fluid sucked into the throttle part is connected, In the ejector in which the throttle portion and the suction fluid introduction pipe communicate with each other,
An ejector characterized in that a reduced diameter portion is provided on the water discharge side of the outflow portion, the diameter of which is reduced according to the amount of fluid sucked in which the cross-sectional area of the outflow portion is set.
The ejector according to claim 2, wherein a baffle plate that blocks a flow of liquid discharged from the reduced diameter portion is disposed downstream of the reduced diameter portion.