JP2002058976A - Ejector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ejector which may be miniaturized by shortening of a diffuser. SOLUTION: This ejector is constituted by communicating a secondary flow passage 4 for sucking gas with a diffusion chamber 3 in which a negative pressure is generated by the water injected from a nozzle 2 through a primary flow passage 1 for supplying the water in a direction orthogonal with the nozzle 2 and communicating a diffuser 5 with the extension line of the nozzle 2. The diffuser 5 comprises the first diffuser 6 opening into the diffusion chamber 3 and the second diffuser 7 continued to the first diffuser 6. The inner bore of the first diffuser 6 is formed nearly equal to the inner diameter of the nozzle part 2 and the inner diameter of the second diffuser 7 is formed larger than the inner diameter of the first diffuser 6. The flow passage areas of the respective diffuser 6 and 7 are made respectively uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ejector, and more particularly, to mixing ozone gas and water in an ozone water generator.
It relates to an ejector to be dissolved.

[0002]

2. Description of the Related Art In an ozone water generator, an ejector has conventionally been used as a method for mixing and dissolving ozone gas in water. As shown in FIG. 7, this ejector forms a nozzle section 32 by narrowing a primary flow path 31 for supplying water, and forms a nozzle section 32 in which water is ejected from the nozzle section 32 to become a negative pressure. A secondary flow path 34 for sucking a gas to be mixed and dissolved in water is communicated with a diffuser section 35 for discharging water in which the gas is mixed and dissolved. This ejector prevents the separation of the fluid from the pipe wall by gradually expanding the flow path of the diffuser section 35 after mixing the ozone gas and the water, suppresses the impedance rise, and reduces the ozone gas suction amount. I try not to be.

[0003]

However, when the diffuser section is gradually widened at an angle of 3.5 °,
If the diameter of the inlet of the diffuser section is 2.6 mm and the diameter of the outlet is 4.6 mm, the length of the diffuser section is about 28 mm.
5 mm, which causes a problem that the entire ejector becomes large.

[0004] It is an object of the present invention to solve the above problems and to provide an ejector which can be reduced in size by shortening a diffuser portion.

[0005]

In order to solve the above-mentioned problems, an ejector according to the present invention is configured such that water is jetted from a nozzle portion formed by narrowing a primary flow path for supplying water to a negative pressure. A secondary flow path for sucking a gas to be mixed with water is communicated in a direction orthogonal to the nozzle section, and a diffuser section for discharging water mixed with gas is communicated on an extension of the nozzle section to the diffusion chamber. In the ejector, the diffuser section has a first opening opening in the diffusion chamber.
And a second diffuser portion that is continuous with the first diffuser portion, the inner diameter of the first diffuser portion is substantially equal to the inner diameter of the nozzle portion,
The inner diameter of the second diffuser is formed larger than the inner diameter of the first diffuser, and the flow areas of the first diffuser and the second diffuser are uniformly formed. .

[0006] A secondary flow for sucking gas to be mixed with water into a diffusion chamber in which water is jetted from a nozzle portion formed with the primary flow path for supplying water tapered and negative pressure is generated. In an ejector in which a passage is communicated with the nozzle portion in a direction orthogonal to the nozzle portion and a diffuser portion that releases water in which gas is mixed is communicated on an extension of the nozzle portion, a flow rate for measuring a flow rate of water in the primary flow path. A sensor may be provided, and a control valve for controlling the amount of gas to be sucked may be provided in the secondary flow path, and the control valve may be controlled in accordance with the amount of water to control the amount of gas suction.

Further, a secondary flow for sucking a gas to be mixed with water into a diffusion chamber where water is jetted from a nozzle portion formed with the primary flow path for supplying water tapered and the pressure becomes negative. An ejector having a path communicating with the nozzle section in a direction orthogonal to the nozzle section and a diffuser section discharging water mixed with gas on an extension of the nozzle section, wherein the primary flow path flows into the first flow path. A control member for controlling the flow path area of the nozzle according to the amount of water to be provided is provided, and the negative pressure of the diffusion chamber is adjusted by changing the flow path area of the nozzle according to the amount of water. The suction amount of the gas sucked from the next flow path may be increased or decreased.

[0008] The control member tapers the nozzle portion side, expands the primary flow path side to form a pressure receiving portion, and arranges an urging member for pushing the control member back to the primary flow path side. The flow path area of the nozzle unit may be controlled according to the flow rate of water.

[0009]

FIG. 1 is a cross-sectional view of an ejector according to the present invention. This ejector is used in an ozone water generator for mixing and dissolving ozone gas in water to generate ozone water. A nozzle 2 is formed by narrowing a primary flow path 1 to be supplied, and a gas (ozone gas) to be mixed with water is sucked into a diffusion chamber 3 in which water is ejected from the nozzle 2 and becomes a negative pressure. The secondary flow path 4 is communicated in a direction orthogonal to the nozzle portion 2, and a diffuser portion 5 for discharging water mixed with a gas (ozone gas) is communicated on an extension of the nozzle portion 2.

The diffuser section 5 comprises a first diffuser section 6 opening to the diffusion chamber, and a second diffuser section 7 continuous with the first diffuser section 6.
The inside diameter of the first diffuser section 6 is substantially equal to the inside diameter of the nozzle section, the inside diameter of the second diffuser section 7 is made larger than the inside diameter of the first diffuser section 6, and the first diffuser section is provided. 6 and the second diffuser portion 7 are formed such that the flow passage area is uniform from the inlet to the outlet.

In the present invention, when the length of the first diffuser 6 is 1 mm, 3 mm, and 28 mm, the amount of ozone gas sucked and the ozone concentration of ozone water are examined. As shown in the graph of the water flow rate versus ozone gas suction amount graph and the graph of the water flow rate versus ozone water concentration graph in FIG. The ozone gas suction amount and ozone water concentration can be measured in the same manner as in the diffuser section, and the same effect as in the conventional diffuser section was obtained.

As described above, the inside diameter of the first diffuser portion that opens to the diffusion chamber is made uniform (straight) from the inlet to the outlet, instead of gradually expanding the diffuser portion from the inlet to the outlet. The length of the (first diffuser) is set to several millimeters, preferably 2 millimeters, and the inner diameter of the second diffuser is made larger than the inner diameter of the first diffuser. Since an effect equivalent to that of an ejector having a conventional diffuser portion having an enlarged inner diameter can be obtained, the length of the entire diffuser portion can be reduced, and the size of the entire ejector can be reduced.

Next, FIG. 3 shows another example of the ejector.
This ejector always keeps the amount of ozone gas sucked through the secondary channel constant regardless of the amount of water flowing through the primary channel.

This ejector sucks ozone gas to be mixed with water into a diffusion chamber 13 in which water is jetted from a nozzle section 12 formed by narrowing a primary flow path 11 for supplying water to form a negative pressure. And a diffuser section 15 for discharging water mixed with ozone gas on an extension of the nozzle section 12, and a secondary flow path 14 for communicating with the nozzle section 12 in a direction orthogonal to the nozzle section 12.
1 is provided with a flow rate sensor 16 for measuring the amount of water, a secondary flow path 14 with a proportional solenoid valve 17, and a control device 18 for controlling the proportional solenoid valve 17 according to the detection result of the flow rate sensor 16. is there.

The control unit 18 may be constituted by a microcomputer, and based on a control program stored in a built-in memory, based on a detection result (flow rate of water) of the flow rate sensor 16, to make the amount of ozone gas to be sucked constant. Proportional solenoid valve 17
To control the opening amount of the secondary flow path 14.

According to the above-described ejector, the control device 18
Is a proportional solenoid valve 17 based on the detection result of the flow sensor 16.
And the amount of ozone gas to be sucked can be controlled by changing the flow area of the secondary flow path 14, so that the amount of ozone gas sucked is controlled to be always constant as shown in FIG. be able to.

FIG. 5 shows still another example of the ejector. This ejector changes the flow passage area of the nozzle portion in accordance with the amount of water flowing through the primary flow passage, so that the ozone gas sucked through the secondary flow passage is changed. The suction amount is increased or decreased.

This ejector sucks ozone gas to be mixed with water into a diffusion chamber 23 in which water is jetted from a nozzle portion 22 formed by narrowing a primary flow path 21 for supplying water to form a negative pressure. And a diffuser section 25 for discharging water mixed with ozone gas on an extension of the nozzle section 22 and a secondary flow path 24 for communicating with the nozzle section 22 in a direction orthogonal to the nozzle section 22.
In FIG. 1, a control member 26 for changing the flow area of the nozzle portion in accordance with the amount of water is disposed.

The control member 26 forms the throttle pin portion 27 with the nozzle portion 22 tapered and forms the pressure receiving portion 28 by expanding the primary flow channel 21 side, and is formed in a wedge shape as a whole. In addition, an urging member (spring) 29 that pushes the control member 26 back to the primary flow path 21 side is arranged.

According to the above-described ejector, the primary flow path 21
Since the water pressure applied to the pressure receiving portion 28 is small when the amount of water flowing into the nozzle portion is small, the control member 26 is urged by the spring 29 and retreats, and the flow area of the nozzle portion 22 by the throttle pin portion 27 is reduced. Therefore, water is spouted from the nozzle portion 22 having a larger flow passage area into the diffusion chamber 23, and the negative pressure in the diffusion chamber 23 is small.
The amount of ozone gas sucked from the nozzle 4 is small. on the other hand,
If the amount of water flowing into the primary flow path 21 increases, the pressure receiving portion 2
8, the control member 26 moves forward against the spring 29, and the throttle pin 27 enters the nozzle 22, so that the flow area of the nozzle 22 is reduced. Since the force of the water spouted from the nozzle portion 22 is increased, the negative pressure in the diffusion chamber 23 is increased, and the amount of ozone gas sucked from the secondary flow path 24 can be increased. As a result, as shown in FIG. 6, the ozone gas suction amount with respect to the water amount becomes constant, and the ozone concentration of the ozone water can be made constant.

As described above, the throttle pin at the tip of the control member disposed in the primary flow path adjusts the flow path area of the nozzle portion, so that a simple structure can be achieved without using an electric control circuit. The ozone concentration of the ozone water can be made constant.

[0022]

According to the first aspect of the present invention, it is possible to reduce the size of the ejector by shortening the length of the diffuser portion, and to restrict the layout when incorporating the ejector into an apparatus such as an ozone water generator. Will not be affected.

According to the second aspect of the present invention, the concentration of ozone water can be made constant by adjusting the amount of ozone gas sucked in accordance with the flow rate of water.

According to the third aspect of the present invention, the control member is operated in accordance with the flow rate of water, and the flow area of the nozzle portion is changed, thereby changing the negative pressure of the diffusion chamber and sucking the amount of ozone gas to be sucked. The concentration of ozone water can be made constant by controlling the increase and decrease of.

The throttle pin at the tip of the control member, which moves in accordance with the flow rate, adjusts the flow path area of the nozzle portion, so that the ozone water can be provided with a simple structure without using an electrical control circuit. Ozone concentration can be made constant.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an ejector according to the present invention.

FIGS. 2A and 2B are graphs for explaining a relationship between an ozone gas suction amount and an ozone concentration of ozone water with respect to a water flow rate.

FIG. 3 is a longitudinal sectional view of a main part illustrating another example of an ejector.

FIG. 4 is a graph illustrating a relationship between an ozone gas suction amount and a water flow rate.

FIG. 5 is a vertical sectional view of an essential part for explaining still another example of the ejector.

FIG. 6 is a graph illustrating the relationship between the flow rate of water and the suction amount of ozone gas.

FIG. 7 is a longitudinal sectional view illustrating the internal structure of a conventional ejector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Primary flow path 2 Nozzle part 3 Diffusion chamber 4 Secondary flow path 5 Diffuser part 6 1st diffuser part 7 2nd diffuser part

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kiyoto Fujii 6-6 Nihonbashi Hakozakicho, Chuo-ku, Tokyo Inside MAX Corporation (72) Inventor Naoki Tohana 6-6 Nihonbashi Hakozakicho, Chuo-ku, Tokyo Max Co., Ltd. (72) Inventor Tomoaki Sakata 6-6 Nihonbashi Hakozakicho, Chuo-ku, Tokyo Max Co., Ltd. F-term (reference) 4G035 AA02 AB20 AE02 AE13

Claims (4)

[Claims] 1. A secondary flow for sucking a gas to be mixed with water into a diffusion chamber in which water is jetted from a nozzle portion formed with a primary flow path for supplying water tapered to form a negative pressure. An ejector having a passage communicating with the nozzle in a direction orthogonal to the nozzle and a diffuser for discharging water mixed with gas on an extension of the nozzle, wherein the diffuser has a first opening that opens to the diffusion chamber; A diffuser portion and a second diffuser portion continuous with the first diffuser portion.
The first diffuser portion has an inner diameter substantially equal to the inner diameter of the nozzle portion, and the second diffuser portion has an inner diameter larger than the inner diameter of the first diffuser portion. An ejector wherein the first diffuser section and the second diffuser section each have a uniform flow path area. 2. A secondary flow for sucking a gas to be mixed with water into a diffusion chamber in which water is jetted from a nozzle portion formed by narrowing a primary flow path for supplying water to form a negative pressure. In an ejector in which a path is communicated with the nozzle section in a direction orthogonal to the nozzle section, and a diffuser section for releasing water mixed with gas is communicated on an extension of the nozzle section, a flow rate for measuring a flow rate of water in the primary flow path An ejector, comprising a sensor, a control valve for controlling a suction amount of gas to be suctioned in the secondary flow path, and a control valve for controlling a gas suction amount by controlling a control valve according to an amount of water. 3. A secondary flow for sucking a gas to be mixed with water into a diffusion chamber in which water is jetted from a nozzle portion formed by narrowing a primary flow path for supplying water to form a negative pressure. An ejector having a path communicating with the nozzle section in a direction orthogonal to the nozzle section and a diffuser section discharging water mixed with gas on an extension of the nozzle section, wherein the primary flow path flows into the first flow path. A control member for controlling the flow path area of the nozzle according to the amount of water to be provided is provided, and the negative pressure of the diffusion chamber is adjusted by changing the flow path area of the nozzle according to the amount of water. An ejector characterized by increasing or decreasing a suction amount of gas sucked from a next flow path. 4. The control member includes a biasing member that tapers the nozzle portion side, expands a primary flow path side to form a pressure receiving portion, and pushes the control member back to the primary flow path side. The ejector according to claim 3.