CN110947535A - Micro-bubble generating nozzle - Google Patents
Micro-bubble generating nozzle Download PDFInfo
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- CN110947535A CN110947535A CN201910881695.1A CN201910881695A CN110947535A CN 110947535 A CN110947535 A CN 110947535A CN 201910881695 A CN201910881695 A CN 201910881695A CN 110947535 A CN110947535 A CN 110947535A
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- air
- pressurized water
- dissolved pressurized
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
Abstract
A fine bubble generating nozzle comprising: an inflow port through which air-dissolved pressurized water in which air is dissolved in water flows; a nozzle body having a decompression unit for decompressing the pressure of the air-dissolved pressurized water flowing from the inlet port; a first collision chamber provided downstream of the nozzle body and having a first collision wall that changes a direction of a flow path of the air-dissolved pressurized water by colliding the air-dissolved pressurized water flowing from the decompression section with the first collision wall; a second collision chamber which is provided on a downstream side of the first collision chamber and has a second collision wall that changes a direction of a flow path of the air-dissolved pressurized water by colliding the air-dissolved pressurized water that has passed through the first collision chamber, the second collision chamber having a larger volume than the first collision chamber; and an outflow port for flowing out the water having passed through the second impact chamber to the outflow portion. Accordingly, a large amount of fine bubbles can be generated.
Description
Technical Field
The technology disclosed in the present specification relates to a fine bubble generating nozzle.
Background
Patent document 1 discloses a fine bubble generating nozzle having an inflow port for flowing air-dissolved pressurized water (air-dissolved pressurized water) in which air is dissolved in water, a decompression portion, and an outflow port; the pressure reducing part reduces the pressure of the air dissolving pressurized water flowing in from the inlet; and the outflow port is used for enabling the air dissolved pressurized water passing through the decompression part to flow out to the outflow part.
[ Prior art documents ]
[ patent document ]
Patent document 1: japanese patent laid-open publication No. 2007-167557
Disclosure of Invention
[ technical problem to be solved by the invention ]
In the fine bubble generating nozzle of patent document 1, air-dissolved pressurized water passes through a decompression section, thereby being gradually decompressed to atmospheric pressure (air pressure). In the process of reducing the pressure of the air-dissolved pressurized water to atmospheric pressure, air dissolved in the water is precipitated, and fine bubbles are generated. However, in the above-described fine bubble generating nozzle, the amount of fine bubbles in the outflow portion is insufficient.
The present specification provides a technique capable of generating a large amount of fine bubbles.
[ technical means for solving problems ]
The fine bubble generating nozzle disclosed in the present specification has an inflow port for flowing air-dissolved pressurized water in which air is dissolved in water, a nozzle body, a first impingement chamber, a second impingement chamber, and an outflow port; the nozzle body has a decompression unit that decompresses the air-dissolved pressurized water flowing in from the inlet to a pressure lower than atmospheric pressure; the first impingement cavity is provided on a downstream side of the nozzle body and has a first impingement wall, and the air-dissolved pressurized water flowing from the decompression unit collides with the first impingement wall to change a direction of a flow path of the air-dissolved pressurized water; the second collision chamber is provided on a downstream side of the first collision chamber and has a second collision wall, the direction of a flow path of the air-dissolved pressurized water passing through the first collision chamber is changed by collision with the second collision wall, and a volume of the second collision chamber is larger than a volume of the first collision chamber; the outflow opening provides for the outflow of water that has passed through the second impingement chamber to an outflow portion.
According to the above configuration, the air that has passed through the decompression section of the nozzle body and has been decompressed dissolves the pressure of the pressurized water, flows into the first impingement chamber through the air-dissolved pressurized water, is pressurized to the first pressure, and then flows into the second impingement chamber. Since the volume of the second impingement cavity is larger than the volume of the first impingement cavity, the flow rate of the air-dissolved pressurized water flowing into the second impingement cavity is slowed, and as a result, the pressure of the air-dissolved pressurized water is pressurized to a second pressure higher than the first pressure. Further, the first pressure and the second pressure are below atmospheric pressure. After that, when the air-dissolved pressurized water is made to flow out to the outflow portion, the air-dissolved pressurized water is pressurized to atmospheric pressure. That is, the air-dissolved pressurized water depressurized by the depressurization portion is gradually pressurized to atmospheric pressure. First, the air-dissolved pressurized water is depressurized to a pressure lower than the atmospheric pressure, and large air bubbles (hereinafter, simply referred to as "air bubbles") are generated in the air-dissolved pressurized water. Then, the pressure of the air-dissolved pressurized water is increased to the first pressure, so that a part of the air bubbles in the air-dissolved pressurized water is broken up into fine air bubbles. When the pressure of the air-dissolved pressurized water is increased to the second pressure, a part of the air bubbles remaining in the air-dissolved pressurized water passing through the first collision chamber is broken into fine air bubbles. When the pressure of the air-dissolved pressurized water is increased to atmospheric pressure, a part of the air bubbles remaining in the air-dissolved pressurized water passing through the second collision chamber is broken into fine air bubbles. Therefore, the amount of the air bubbles that are divided into the fine air bubbles can be increased in the fine air bubble generating nozzle, and the amount of the fine air bubbles that are generated in the outflow portion can be increased.
In addition, the air bubbles formed by the air dissolving pressurized water passing through the decompression section of the nozzle body collide against the first collision wall of the first collision chamber and the second collision wall of the second collision chamber, thereby being able to be split into smaller air bubbles. Therefore, the amount of fine bubbles generated in the outflow portion can be increased.
In the fine bubble generating nozzle, the first collision wall may have a surface on which the air-dissolved pressurized water collides, and the surface may have irregularities.
The air flowing into the first impingement chamber through the relief portion of the nozzle body dissolves the pressurized water at a faster flow rate. Thus, sound can be generated due to the air dissolving pressurized water striking the first impact wall. According to the above configuration, the impact when the air-dissolved pressurized water strikes the first collision wall is relaxed by the irregularities provided on the first collision wall. Therefore, the sound generated during the use of the fine bubble generating nozzle can be suppressed. Further, the surface of the first collision wall on which the air-dissolved pressurized water collides may have a plurality of recesses, a plurality of projections, a plurality of through holes, or the like.
In the fine bubble generating nozzle, the center axis of the decompression section may be inclined with respect to the first collision wall.
According to the above configuration, the central axis of the decompression section is inclined with respect to the first collision wall, so that the air-dissolved pressurized water passing through the decompression section is collided in a state inclined with respect to the first collision wall. In this case, the air-dissolved pressurized water having impinged on the first impingement wall can become a swirling flow. Accordingly, after passing through the first impingement cavity, the air-dissolved pressurized water is agitated to promote the breaking up of the air bubbles within the air-dissolved pressurized water into fine air bubbles. Therefore, the amount of fine bubbles generated in the outflow portion can be increased.
The fine bubble generating nozzle disclosed in the present specification has an inflow port through which gas-dissolved pressurized water in which gas is dissolved in water flows, a nozzle body, a first impingement chamber, a second impingement chamber, and an outflow port; the nozzle body has a pressure reducing section for reducing the pressure of the gas-dissolved pressurized water flowing in from the inlet port; the first impingement cavity is provided on a downstream side of the nozzle body and has a first impingement wall, and the gas-dissolved pressurized water flowing from the decompression section collides with the first impingement wall to change a direction of a flow path of the gas-dissolved pressurized water; the second collision chamber is provided on a downstream side of the first collision chamber and has a second collision wall, the direction of a flow path of the gas-dissolved pressurized water passing through the first collision chamber is changed by collision with the second collision wall, and a volume of the second collision chamber is larger than a volume of the first collision chamber; the outflow opening provides for the outflow of water that has passed through the second impingement chamber to an outflow portion.
According to the above configuration, the pressure of the gas-dissolved pressurized water depressurized through the depressurization portion of the nozzle body flows into the first impingement chamber by the gas-dissolved pressurized water, and flows into the second impingement chamber after being pressurized to the first pressure. Since the volume of the second impingement cavity is larger than the volume of the first impingement cavity, the flow rate of the gas dissolved pressurized water flowing into the second impingement cavity becomes slower, and as a result, the pressure of the gas dissolved pressurized water is pressurized to a second pressure higher than the first pressure. Further, the first pressure and the second pressure are lower than atmospheric pressure. After that, when the gas dissolved pressurized water flows out to the outflow portion, the gas dissolved pressurized water is pressurized to the atmospheric pressure. That is, the gas-dissolved pressurized water depressurized by the depressurization portion is gradually pressurized to atmospheric pressure. First, the gas-dissolved pressurized water is depressurized to a pressure lower than the atmospheric pressure, whereby large bubbles (hereinafter, referred to as "bubbles") are generated in the gas-dissolved pressurized water. Then, the pressure of the gas dissolved pressurized water is increased to the first pressure, so that a part of the bubbles in the gas dissolved pressurized water is broken up into fine bubbles. When the pressure of the gas dissolved pressurized water is increased to the second pressure, a part of the bubbles remaining in the gas dissolved pressurized water passing through the first collision chamber is broken up into fine bubbles. When the pressure of the gas-dissolved pressurized water is increased to atmospheric pressure, a part of the bubbles remaining in the gas-dissolved pressurized water passing through the second collision chamber is broken up into fine bubbles. Therefore, the amount of the air bubbles divided into the fine air bubbles can be increased in the fine air bubble generating nozzle, and the amount of the fine air bubbles generated in the outflow portion can be increased.
In addition, the gas bubbles formed by the gas dissolving pressurized water passing through the decompression section of the nozzle body collide against the first collision wall of the first collision chamber and the second collision wall of the second collision chamber, thereby being able to be split into smaller gas bubbles. Therefore, the amount of fine bubbles generated in the outflow portion can be increased.
Drawings
Fig. 1 is a perspective view of a fine bubble generating nozzle 10 according to the present embodiment.
Fig. 2 is a sectional view of the fine bubble generation nozzle 10 taken along line II-II of fig. 1.
Fig. 3 is a perspective view of the nozzle body 20 according to the present embodiment.
Fig. 4 is a perspective view and a rear view of the holder portion 40 according to the present embodiment.
Fig. 5 is a diagram showing the pressure at which the air flowing into the fine bubble generating nozzle 10 dissolves the pressurized water.
Fig. 6 is a perspective view and a rear view of a nozzle body 120 according to a first modification.
Fig. 7 is a rear view of holder portion 240 according to a second modification.
Fig. 8 is a left side view and a rear side view of a nozzle body 320 according to a third modification.
[ description of reference ]
10: a fine bubble generating nozzle; 20: a nozzle body; 22: a cylindrical portion; 22 a: an inflow port; 24: a circular plate portion; 26: a cylindrical portion; 28: a decompression section; 28 a: an ejection port; 40: a holder portion; 42: an outer cylindrical portion; 42 a: a first cylindrical portion; 42 b: a second cylindrical portion; 44: an inner cylindrical portion; 46: a circular plate portion; 48: a connecting portion; 50: an outflow port; 52: a connecting portion; 60: a first impingement cavity; 62: a first waterway; 64: a second impingement cavity; 66: a second waterway; b, a threaded hole.
Detailed Description
(construction of the Fine bubble generating nozzle 10)
The fine bubble generating nozzle 10 will be described with reference to fig. 1 to 4. The fine bubble generating nozzle 10 is a nozzle for generating fine bubbles in an outflow portion of a bathtub (not shown) or the like. As shown in fig. 1, the fine bubble generating nozzle 10 includes a nozzle body 20 and a holder portion 40. In fig. 1 and 2, the nozzle body 20 is supported by a holder portion 40.
(Structure of nozzle body 20)
The structure of the nozzle body 20 will be described with reference to fig. 1 to 3. In the following description, the X-axis direction parallel to the central axis C1 of the fine bubble generating nozzle 10 of fig. 2 is referred to as the front-rear direction, the Z-axis direction orthogonal to the X-axis direction is referred to as the vertical direction, and the Y-axis direction orthogonal to the X-axis and the Z-axis is referred to as the horizontal direction. As shown in fig. 3, the nozzle body 20 has a cylindrical portion 22, a circular plate portion 24, and a cylindrical portion 26. The cylindrical portion 22 is provided with an inflow port 22 a. A water supply pipe (not shown) for supplying air-dissolved pressurized water in which air is dissolved in water to the fine bubble generating nozzle 10 is connected to the cylindrical portion 22. The disc portion 24 is provided between the cylindrical portion 22 and the cylindrical portion 26. As shown in fig. 2, the outer diameter of the circular plate portion 24 is larger than the outer diameter of the cylindrical portion 26. The outer diameter of the cylindrical portion 26 is smaller than the outer diameter of the cylindrical portion 22. The nozzle body 20 also has two relief portions 28. The decompression portion 28 penetrates the cylindrical portion 22, the circular plate portion 24, and the cylindrical portion 26. The decompression section 28 has an ejection port 28 a. The cross-sectional area of the water passage in the pressure reducing portion 28 is smaller than the cross-sectional area of the water passage of the inlet 22 a. In the present embodiment, the cross-sectional area of the water passage of the decompression section 28 is set so that the pressure of the air-dissolved pressurized water passing through the decompression section 28 becomes lower than the atmospheric pressure. The central axis C2 of the decompression section 28 is parallel to the central axis C1 and perpendicular to the disk section 46 of the holder section 40 described later.
(Structure of holder portion 40)
Next, the structure of the holder portion 40 will be described with reference to fig. 1, 2, and 4. Fig. 4 (a) is a perspective view of the holder portion 40, and fig. 4 (b) is a rear view of the holder portion 40 as viewed from the rear. As shown in fig. 4 (a), the holder portion 40 has an outer cylindrical portion 42 and two coupling portions 52. As shown in fig. 2, the outer cylindrical portion 42 is composed of a first cylindrical portion 42a and a second cylindrical portion 42 b. The outer diameter of the first cylindrical portion 42a coincides with the outer diameter of the second cylindrical portion 42 b. The inner diameter of the second cylindrical portion 42b substantially coincides with the outer diameter of the disc portion 24 of the nozzle body 20 (see fig. 2). The inner diameter of the second cylindrical portion 42b is larger than the inner diameter of the first cylindrical portion 42a, and a step is provided between the first cylindrical portion 42a and the second cylindrical portion 42 b.
As shown in fig. 4 (a), the coupling portion 52 protrudes outward from the outer peripheral surface of the outer cylindrical portion 42. The coupling portion 52 is provided with a screw hole B. The screw hole B of the coupling portion 52 is a screw hole for attaching the holder portion 40 to a bathtub connection fixture (not shown). Further, the bathtub connecting device is a device for attaching the fine bubble generating nozzles 10 to a bathtub. After the nozzle body 20 is inserted into the holder portion 40, the fine bubble generating nozzle 10 and the bathtub connection fixture are coupled by aligning the mounting hole (not shown) of the bathtub connection fixture with the screw hole B of the coupling portion 52 and screwing the screw member (not shown) into the screw hole B.
As shown in fig. 2 and 4 (b), an inner cylindrical portion 44 and a disk portion 46 are provided inside the outer cylindrical portion 42. The disc portion 46 is connected to the outer cylindrical portion 42 by four connecting portions 48. As shown in fig. 2, the inner cylindrical portion 44 extends rearward from a rear end 46a of the disc portion 46. The outer diameter of the inner cylindrical portion 44 matches the outer diameter of the disc portion 46. The inner cylinder 44 has an outer diameter smaller than the inner diameter of the outer cylinder 42. That is, a gap is provided between the inner cylindrical portion 44 and the outer cylindrical portion 42. Four outflow ports 50 are formed through gaps between the inner cylindrical portion 44 and the outer cylindrical portion 42. The inner cylindrical portion 44 has an inner diameter larger than the outer diameter of the cylindrical portion 26 of the nozzle body 20. That is, a gap is provided between the inner cylindrical portion 44 and the cylindrical portion 26. The rear end 44a of the inner cylindrical portion 44 is located between the front end 24a of the disc portion 24 and the front end 26a of the cylindrical portion 26 of the nozzle body 20.
As shown in fig. 2, in a state where nozzle body 20 is supported by holder portion 40, first collision chamber 60, first water passage 62, second collision chamber 64, and second water passage 66 are formed in holder portion 40. The first collision chamber 60 is a region between the rear end 46a of the disc portion 46 and the front end 26a of the cylindrical portion 26 of the nozzle body 20, and is defined by the disc portion 46 and the inner cylindrical portion 44. The first striker cavity 60 is a region having an outer diameter d1 (inner diameter of the inner cylindrical portion 44) and a width W1. The volume V1 of the first impingement cavity 60 is calculated by the following equation (1).
[ mathematical formula 1 ]
V1＝π*(d1/2)2W1. the formula (1)
The second collision chamber 64 is a region between the rear end 44a of the inner cylindrical portion 44 and the front end 24a of the disc portion 24, and is defined by the outer cylindrical portion 42, the disc portion 24, and the cylindrical portion 26. The second striker cavity 64 is a region having an inner diameter d2 (the outer diameter of the cylindrical portion 26), an outer diameter d3 (the inner diameter of the first cylindrical portion 42 a), and a width W2. The volume V2 of the second impingement cavity 64 is calculated by the following equation (2). In addition, the volume V2 of the second impingement cavity 64 is greater than the volume V1 of the first impingement cavity 60.
[ mathematical formula 2 ]
V2＝π((d3/2)2-(d2/2)2) ＊ W2. formula (2)
A second waterway 66 is a waterway connecting the second impingement cavity 64 and the outflow port 50. The second water passage 66 is formed by a gap between the outer cylindrical portion 42 and the inner cylindrical portion 44.
Next, referring to fig. 2 and 5, a water path through which the air-dissolved pressurized water flows in the fine bubble generating nozzle 10 and the pressure of the air-dissolved pressurized water when the air-dissolved pressurized water flows in the fine bubble generating nozzle 10 will be described. In fig. 2, solid arrows indicate flow paths of water.
First, air-dissolved pressurized water flows into the fine bubble generating nozzle 10 through the inflow port 22a of the nozzle body 20. The pressure Va of the air-dissolved pressurized water at this time is higher than the atmospheric pressure (see fig. 5 (a)). The air-dissolved pressurized water then flows into the pressure relief section 28. The flow rate of the air-dissolved pressurized water is increased by the air-dissolved pressurized water passing through the decompression section 28, and as a result, the pressure of the air-dissolved pressurized water is decompressed to a pressure Vb lower than the atmospheric pressure (see fig. 5 (b)). At this time, air bubbles are generated in the air-dissolved pressurized water.
Subsequently, the air-dissolved pressurized water is ejected into the first collision chamber 60 of the holder portion 40 through the ejection port 28 a. When the air-dissolved pressurized water is ejected into the first ram chamber 60, the flow rate of the air-dissolved pressurized water is reduced, and as a result, the pressure of the air-dissolved pressurized water is increased to the pressure Vc (see fig. 5 (c)). The pressure of the air-dissolved pressurized water is increased to the pressure Vc, and the air bubbles in the air-dissolved pressurized water contract. Then, a part of the air bubbles in the air dissolved pressurized water is broken up into fine air bubbles. In addition, a part of the air bubbles in the air-dissolved pressurized water is broken into smaller air bubbles by the air-dissolved pressurized water hitting the disc portion 46.
The air having collided with the disk portion 46 dissolves the pressurized water, passes through the first water path 62, and flows into the second collision chamber 64. As noted above, the volume V2 of the second impingement cavity 64 is greater than the volume V1 of the first impingement cavity 60. Therefore, the flow rate of the air-dissolved pressurized water flowing into the second impingement cavity 64 is reduced, and as a result, the pressure of the air-dissolved pressurized water is increased to a pressure Vd higher than the pressure Vc (see fig. 5 (d)). Accordingly, the air bubbles remaining in the air-dissolved pressurized water passing through the first impingement cavity 60 contract, and a part of the air bubbles are broken up into fine air bubbles. Further, the air-dissolved pressurized water hits the disk portion 24 of the nozzle body 20, and a part of the air bubbles in the air-dissolved pressurized water is broken into smaller air bubbles.
Then, the air-dissolved pressurized water hitting the disk portion 24 passes through the second water passage 66 and the outflow port 50 of the holder portion 40, and flows out to an outflow portion such as a bathtub. The pressure of the air-dissolved pressurized water is increased to atmospheric pressure in the outflow portion (see fig. 5 (e)). Accordingly, the air bubbles remaining in the air-dissolved pressurized water passing through the second collision chamber 64 contract, and a part of the air bubbles are broken up into fine air bubbles. In addition, the air-dissolved pressurized water flowing out to the outflow portion also includes fine bubbles generated in the first and second impingement chambers 60 and 64. Accordingly, a large amount of fine bubbles are generated in the outflow portion.
As described above, the air-dissolved pressurized water decompressed through the decompression section 28 of the nozzle body 20 flows into the first percussion chamber 60 through the air-dissolved pressurized water, and is thereby pressurized to the pressure Vc (see fig. 5 (c)). Further, since the volume V2 of the second percussion chamber 64 is larger than the volume V1 of the first percussion chamber 60, the flow rate of the air-dissolved pressurized water flowing into the second percussion chamber 64 is reduced, and as a result, the pressure of the air-dissolved pressurized water is increased to the pressure Vd compared with the pressure Vc (see fig. 5 (d)). After that, when the air-dissolved pressurized water is caused to flow out to the outflow portion, the air-dissolved pressurized water is pressurized to the atmospheric pressure (see fig. 5 (e)). That is, the air-dissolved pressurized water depressurized by the depressurizing unit 28 is gradually pressurized to the atmospheric pressure. First, the air-dissolved pressurized water is reduced in pressure to a pressure Vb lower than the atmospheric pressure, and bubbles are generated in the air-dissolved pressurized water. Then, the pressure of the air dissolved pressurized water is increased to the pressure Vc, and a part of the air bubbles in the air dissolved pressurized water is broken up into fine air bubbles. When the pressure of the air-dissolved pressurized water is increased to the pressure Vd, a part of the air bubbles remaining in the air-dissolved pressurized water passing through the first collision chamber 60 is broken up into fine air bubbles. When the pressure of the air-dissolved pressurized water is increased to atmospheric pressure, a part of the air bubbles remaining in the air-dissolved pressurized water passing through the second collision chamber 64 is broken into fine air bubbles. Therefore, in the fine bubble generating nozzle 10, the amount of the bubbles that are divided into fine bubbles can be increased, and the amount of the fine bubbles generated in the outflow portion can be increased.
In addition, the air bubbles formed by the air dissolving pressurized water passing through the decompression section 28 of the nozzle body 20 collide against the disc portion 46 of the first collision chamber 60 and the disc portion 24 of the second collision chamber 64, thereby being split into smaller air bubbles. Therefore, the amount of fine bubbles generated in the outflow portion can be increased.
(corresponding relationship)
The disc portion 46 of the holder portion 40 and the disc portion 24 of the nozzle body 20 are examples of the "first collision wall" and the "second collision wall", respectively.
The embodiments have been described in detail, but these embodiments are merely examples and do not limit the scope of the claims. The techniques described in the claims include those obtained by variously changing or modifying the specific examples illustrated above.
In the following modifications, the same reference numerals are given to the same components as those of the embodiments, and the description thereof will be omitted.
(first modification) the number of the decompression sections 28 provided in the nozzle body 20 is not limited to two, and may be one, or may be three or more. For example, as shown in fig. 6 (a) and (b), six decompression sections 128 may be provided in the nozzle body 120. As shown in fig. 6 (b), in the present modification, six decompression sections 128 are provided concentrically.
(second modification) as shown in fig. 7, a plurality of holes 246a may be provided in the circular plate portion 246 of the holder portion 240. The air passing through the relief portion 28 of the nozzle body 20 and flowing into the first impingement cavity 60 dissolves the pressurized water at a faster flow rate. In the present modification, the impact of the air-dissolved pressurized water striking the disc portion 246 is alleviated by the plurality of holes 246a provided in the disc portion 246 of the first striking chamber 60. Therefore, the sound generated during the use of the fine bubble generating nozzle 10 can be suppressed. In the present modification, the plurality of holes 246a are an example of "unevenness". In another modification, a plurality of concave portions, a plurality of convex portions, and the like may be provided in the disk portion 246.
As shown in fig. 8 (a) and (b), the central axis C32 of the pressure reducing section 328 of the nozzle body 320 may be inclined with respect to the disc 46. Fig. 8 (a) is a left side view of the nozzle body 320 as viewed from the left, and fig. 8 (b) is a rear view of the nozzle body 320 as viewed from the rear. In the present modification, the central axis C32 of the relief portion 328 is inclined with respect to the circular plate portion 46. Therefore, the air-dissolved pressurized water ejected into the first collision chamber 60 of the holder portion 40 through the ejection port 328a collides with the disc portion 46 in a state inclined with respect to the disc portion 46. In this case, the air-dissolved pressurized water having impinged on the disk portion 46 can be turned into a swirling flow. Accordingly, after passing through the first impingement cavity 60, the air-dissolved pressurized water is agitated, promoting the air bubbles within the air-dissolved pressurized water to break into minute air bubbles. Therefore, the amount of fine bubbles generated in the outflow portion can be increased.
(fourth modification) in the above-described embodiment, air-dissolved pressurized water flows into the fine bubble generating nozzle 10. In the modification, instead of the air-dissolved pressurized water, the air-dissolved pressurized water in which the gas is dissolved may be flowed into the fine bubble generating nozzle 10. According to such a configuration, by passing the gas-dissolved pressurized water through the fine bubble generating nozzle 10, the amount of fine bubbles generated in the outflow portion can be increased. Examples of the gas include carbon dioxide, oxygen, and hydrogen.
The technical elements described in the present specification or drawings exhibit technical usefulness by themselves or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques illustrated in the present specification or the drawings can achieve a plurality of objects at the same time, but achieving one of the objects has technical usefulness by itself.
Claims (4)
1. A fine bubble generating nozzle, characterized in that,
having an inflow opening, a nozzle body, a first impingement chamber, a second impingement chamber, and an outflow opening, wherein,
the inflow port is used for flowing air dissolved pressurized water dissolved with air in water;
the nozzle body has a decompression unit for decompressing the pressure of the air-dissolved pressurized water flowing in from the inlet port;
the first collision chamber is provided on a downstream side of the nozzle body and has a first collision wall that changes a direction of a flow path of the air-dissolved pressurized water by colliding the air-dissolved pressurized water flowing from the decompression section;
a second collision chamber provided downstream of the first collision chamber and having a second collision wall that changes a direction of a flow path of the air-dissolved pressurized water by colliding the air-dissolved pressurized water that has passed through the first collision chamber, the second collision chamber having a larger volume than the first collision chamber;
the outflow opening is for the water after passing through the second impingement chamber to flow out to an outflow portion.
2. The micro-bubble generating nozzle according to claim 1,
the first collision wall has a surface on which air-dissolved pressurized water collides, and has projections and depressions.
3. The fine bubble generating nozzle according to claim 1 or 2,
the central axis of the relief portion is inclined with respect to the first impact wall.
4. A fine bubble generating nozzle, characterized in that,
having an inflow opening, a nozzle body, a first impingement chamber, a second impingement chamber, and an outflow opening, wherein,
the inflow port is used for flowing gas dissolved pressurized water dissolved with gas in water;
the nozzle body has a pressure reducing section for reducing the pressure of the gas-dissolved pressurized water flowing in from the inlet port;
the first impingement cavity is provided on a downstream side of the nozzle body and has a first impingement wall that changes a direction of a flow path of the gas-dissolved pressurized water by impinging the gas-dissolved pressurized water flowing from the decompression section;
a second collision chamber which is provided downstream of the first collision chamber and has a second collision wall that changes a direction of a flow path of the gas-dissolved pressurized water by colliding the gas-dissolved pressurized water that has passed through the first collision chamber, the second collision chamber having a larger volume than the first collision chamber;
the outflow opening is for the water after passing through the second impingement chamber to flow out to an outflow portion.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-180352 | 2018-09-26 | ||
| JP2018180352 | 2018-09-26 | ||
| JP2019041978A JP7281307B2 (en) | 2018-09-26 | 2019-03-07 | Fine bubble generation nozzle |
| JP2019-041978 | 2019-03-07 |
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|---|---|
| CN110947535A true CN110947535A (en) | 2020-04-03 |
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| CN201910881695.1A Pending CN110947535A (en) | 2018-09-26 | 2019-09-18 | Micro-bubble generating nozzle |
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