JP2015155088A - bubble generator and bubble generation mechanism - Google Patents

bubble generator and bubble generation mechanism Download PDF

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JP2015155088A
JP2015155088A JP2014031131A JP2014031131A JP2015155088A JP 2015155088 A JP2015155088 A JP 2015155088A JP 2014031131 A JP2014031131 A JP 2014031131A JP 2014031131 A JP2014031131 A JP 2014031131A JP 2015155088 A JP2015155088 A JP 2015155088A
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JP6199768B2 (en
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真也 水谷
Shinya Mizutani
真也 水谷
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Mizutani Valve Kogyo KK
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Abstract

PROBLEM TO BE SOLVED: To provide a bubble generator capable of increasing an amount of fine bubbles by shearing bubbles more finely.
SOLUTION: A bubble generator 1 comprises a body 3 having a channel X, a throttle channel 4, and a rotational flow forming body 5. The throttle channel 4 is provided in the body 3, and the channel X is formed narrower at the downstream side than the upstream side in order to generate bubbles. The rotational flow forming body 5 is housed at the upstream side of the throttle channel 4 in the body 3. The rotational flow forming body 5 comprises a first through-hole 5a which communicates the upstream side and the downstream side at a position surrounding a central portion of the rotational flow forming body 5 so as to form a rotational flow at the downstream side. The rotational flow forming body 5 also comprises a second through-hole 5b which communicates the upstream side and the downstream side at the central portion of the rotational flow forming body 5 so as to guide a water flow to the central part of the rotational flow.
COPYRIGHT: (C)2015,JPO&INPIT

Description

この発明は、流路を流れる水に微小なバブルを発生させる、バブル発生器およびバブル発生機構に関するものである。   The present invention relates to a bubble generator and a bubble generation mechanism that generate minute bubbles in water flowing in a flow path.

従来、シャワーノズルにおいて、内部に、マイクロバブルの発生機構を備えたものがあった（例えば、特許文献１参照）。図１０に示すように、このシャワーノズルは、上流側本体１１に、分流コマ１２と、下流側に向けて窄まる第１流路１３とが設けられた。ここで、分流コマ１２は、下流側に旋回流を形成するよう、多数の通液孔１２ａ、１２ａを有するものであって、この旋回流の作用によりマイクロバブルを発生することができた。   Conventionally, some shower nozzles have a microbubble generating mechanism inside (for example, see Patent Document 1). As shown in FIG. 10, the shower nozzle is provided with a flow dividing piece 12 and a first flow path 13 that narrows toward the downstream side in the upstream main body 11. Here, the diversion piece 12 has a large number of liquid passage holes 12a and 12a so as to form a swirling flow on the downstream side, and microbubbles could be generated by the action of the swirling flow.

実用新案登録第３１７４６６８号公報Utility Model Registration No. 3174668

ところで、前記従来のシャワーノズルにあっては、分流コマ１２による旋回流によって、細かなバブルを、ある程度発生することはできたが、さらに細かくせん断することで、微小なバブルの量を増やすことが望まれた。   By the way, in the conventional shower nozzle, fine bubbles can be generated to some extent by the swirling flow by the flow dividing piece 12, but by further finely shearing, the amount of fine bubbles can be increased. Wanted.

この発明は、上記した従来の問題を解決するためになされたものであり、その目的とするところは、バブルをより細かくせん断して、微小なバブルの量を増やすことができる、バブル発生器およびバブル発生機構を提供することにある。   The present invention has been made to solve the above-described conventional problems. The object of the present invention is to generate a bubble generator capable of increasing the amount of minute bubbles by finely shearing the bubbles. It is to provide a bubble generation mechanism.

この発明に係るバブル発生器およびバブル発生機構は、前記目的を達成するために、次の構成からなる。すなわち、
請求項１に記載の発明に係るバブル発生器は、流路を流れる水に微小なバブルを発生させるバブル発生器であって、前記流路を有する本体と、前記本体に設けられて、前記バブルを発生すべく、前記流路が、上流側に比して下流側が絞られて形成された、絞り流路と、前記本体における、前記絞り流路の上流側に収容される、旋回流形成体とを、備える。ここで、前記旋回流形成体は、下流側に旋回流を形成するよう、前記旋回流形成体の中心部分を取り囲む位置において、上流側と下流側とを連通する、第１貫通孔を有する。さらに、前記旋回流形成体は、前記旋回流の中心部に水流を導くよう、前記旋回流形成体の中心部分において、上流側と下流側とを連通する、第２貫通孔を有する。 In order to achieve the object, the bubble generator and the bubble generation mechanism according to the present invention have the following configuration. That is,
The bubble generator according to the first aspect of the present invention is a bubble generator that generates minute bubbles in water flowing through a flow path, the main body having the flow path, and the bubble generator provided in the main body. In order to generate the flow path, the flow path is formed with the downstream side narrowed compared to the upstream side, and the swirl flow forming body is accommodated in the main body upstream of the throttle flow path. Are provided. Here, the swirl flow forming body has a first through hole that communicates the upstream side and the downstream side at a position surrounding the central portion of the swirl flow formation body so as to form a swirl flow on the downstream side. Further, the swirl flow forming body has a second through-hole that communicates the upstream side and the downstream side in the central portion of the swirl flow forming body so as to guide the water flow to the central part of the swirl flow.

このバブル発生器によると、本体には、絞り流路が設けられ、その絞り流路の上流側に、旋回流形成体が収容される。この旋回流形成体は、中心部分を取り囲む位置に、第１貫通孔を有し、この第１貫通孔により、旋回流形成体の下流側に旋回流が形成される。そこで、絞り流路によって発生するバブルは、この旋回流により、細かくせん断される。そして、旋回流形成体は、中心部分に、第２貫通孔を有し、この第２貫通孔により、旋回流の中心部に水流が導かれる。これにより、旋回流と、その旋回流の中心部に導かれる水流とが、擦れ合い、バブルは、より細かくせん断される。   According to this bubble generator, the main body is provided with the throttle channel, and the swirl flow forming body is accommodated on the upstream side of the throttle channel. The swirl flow forming body has a first through hole at a position surrounding the central portion, and a swirl flow is formed on the downstream side of the swirl flow forming body by the first through hole. Therefore, bubbles generated by the throttle channel are finely sheared by this swirling flow. The swirl flow forming body has a second through hole in the center portion, and the water flow is guided to the center of the swirl flow by the second through hole. Thereby, a swirl flow and the water flow guide | induced to the center part of the swirl flow mutually rub, and a bubble is sheared more finely.

また、請求項２に記載の発明に係るバブル発生器は、請求項１に記載のバブル発生器において、前記絞り流路を有して前記本体に着脱可能に収容される絞り流路形成部材を備える。こうして、絞り流路を有する絞り流路形成部材を、本体に着脱可能に設けることで、絞り流路につき各種サイズ、形状からなる絞り流路形成部材を用意し、それら絞り流路形成部材の一つを選択して使用したり、それら絞り流路形成部材を取り換えて使用することで、絞り流路にて発生する負圧の大きさを変えてバブルの量を変化させたり、水の流量を変化させたりすることができる。   A bubble generator according to the invention described in claim 2 is the bubble generator according to claim 1, further comprising a throttle channel forming member that has the throttle channel and is detachably accommodated in the main body. Prepare. In this way, by providing the throttle channel forming member having the throttle channel detachably on the main body, the throttle channel forming member having various sizes and shapes is prepared for the throttle channel, and one of the throttle channel forming members is prepared. By selecting and using one, or by replacing these throttle flow path forming members, the amount of bubbles can be changed by changing the magnitude of the negative pressure generated in the throttle flow path, or the flow rate of water It can be changed.

また、請求項３に記載の発明に係るバブル発生器は、請求項１または２に記載のバブル発生器において、前記本体は、前記絞り流路の下流側に、前記流路が、上流側に比して下流側が広がって形成された、広がり流路を有する。   The bubble generator according to claim 3 is the bubble generator according to claim 1 or 2, wherein the main body is on the downstream side of the throttle channel, and the channel is on the upstream side. Compared to this, it has a spreading channel formed on the downstream side.

また、請求項４に記載の発明に係るバブル発生機構は、流路を流れる水に微小なバブルを発生させるバブル発生機構であって、前記バブルを発生すべく、前記流路が、上流側に比して下流側が絞られて形成された、絞り流路と、前記絞り流路の上流側に設けられる旋回流形成体とを、備える。ここで、前記旋回流形成体は、下流側に旋回流を形成するよう、前記旋回流形成体の中心部分を取り囲む位置において、上流側と下流側とを連通する、第１貫通孔を有する。さらに、前記旋回流形成体は、前記旋回流の中心部に水流を導くよう、前記旋回流形成体の中心部分において、上流側と下流側とを連通する、第２貫通孔を有する。   The bubble generating mechanism according to the invention described in claim 4 is a bubble generating mechanism that generates minute bubbles in water flowing through the flow path, and the flow path is located upstream in order to generate the bubbles. Compared with the throttle channel, the throttle channel and the swirl flow forming body provided on the upstream side of the throttle channel are provided. Here, the swirl flow forming body has a first through hole that communicates the upstream side and the downstream side at a position surrounding the central portion of the swirl flow formation body so as to form a swirl flow on the downstream side. Further, the swirl flow forming body has a second through-hole that communicates the upstream side and the downstream side in the central portion of the swirl flow forming body so as to guide the water flow to the central part of the swirl flow.

このバブル発生機構によると、絞り流路の上流側には、旋回流形成体が設けられる。この旋回流形成体は、中心部分を取り囲む位置に、第１貫通孔を有し、この第１貫通孔により、旋回流形成体の下流側に旋回流が形成される。そこで、絞り流路によって発生するバブルは、この旋回流により、細かくせん断される。そして、旋回流形成体は、中心部分に、第２貫通孔を有し、この第２貫通孔により、旋回流の中心部に水流が導かれる。これにより、旋回流と、その旋回流の中心部に導かれる水流とが、擦れ合い、バブルは、より細かくせん断される。   According to this bubble generating mechanism, the swirl flow forming body is provided on the upstream side of the throttle channel. The swirl flow forming body has a first through hole at a position surrounding the central portion, and a swirl flow is formed on the downstream side of the swirl flow forming body by the first through hole. Therefore, bubbles generated by the throttle channel are finely sheared by this swirling flow. The swirl flow forming body has a second through hole in the center portion, and the water flow is guided to the center of the swirl flow by the second through hole. Thereby, a swirl flow and the water flow guide | induced to the center part of the swirl flow mutually rub, and a bubble is sheared more finely.

この発明に係るバブル発生器およびバブル発生機構によれば、旋回流形成体に、旋回流を形成するための第１貫通孔を設けるとともに、旋回流形成体の中心部分に第２貫通孔を設けて、旋回流と中心部の水流とを擦り合わせることで、発生するバブルをより細かくせん断して、微小なバブルの量を増やすことができる。   According to the bubble generator and the bubble generating mechanism according to the present invention, the swirl flow forming body is provided with the first through hole for forming the swirl flow, and the second through hole is provided in the central portion of the swirl flow forming body. Then, by rubbing the swirling flow and the water flow at the center, the generated bubbles can be sheared more finely, and the amount of minute bubbles can be increased.

この発明の一実施の形態の、バブル発生器の縦断面図である。It is a longitudinal cross-sectional view of the bubble generator of one Embodiment of this invention. 同じく、絞り流路形成部材を示す図であり、（ａ）は、縦断面図、（ｂ）は、底面図を示す。Similarly, it is a figure which shows a throttle flow path formation member, (a) is a longitudinal cross-sectional view, (b) shows a bottom view. 同じく、旋回流形成体を示す図であり、（ａ）は、平面図、（ｂ）は、Ａ−Ａ線による断面図、（ｃ）は、底面図を示す。Similarly, it is a figure which shows a swirl | vortex flow formation body, (a) is a top view, (b) is sectional drawing by the AA line, (c) shows a bottom view. 同じく、図３（ａ）におけるＢ−Ｂ線による断面図である。Similarly, it is sectional drawing by the BB line in Fig.3 (a). 同じく、バブル発生器を水栓設備に組み込んだ状態を示す縦断面図である。Similarly, it is a longitudinal cross-sectional view which shows the state which incorporated the bubble generator in the faucet equipment. 旋回流形成体の変形例を示す図であり、（ａ）は、平面図、（ｂ）は、Ｃ−Ｃ線による断面図、（ｃ）は、底面図を示す。It is a figure which shows the modification of a turning flow formation body, (a) is a top view, (b) is sectional drawing by CC line, (c) shows a bottom view. 同じく、斜視図を示す。Similarly, a perspective view is shown. 旋回流形成体の他の変形例を示す図であり、（ａ）は、平面図、（ｂ）は、Ｄ−Ｄ線による断面図、（ｃ）は、底面図を示す。It is a figure which shows the other modification of a turning flow formation body, (a) is a top view, (b) is sectional drawing by DD line, (c) shows a bottom view. 同じく、図８（ａ）におけるＥ−Ｅ線による断面図である。Similarly, it is sectional drawing by the EE line in Fig.8 (a). 従来の、マイクロバブル発生機構を示す断面図である。It is sectional drawing which shows the conventional microbubble generation mechanism.

以下、この発明に係るバブル発生器およびバブル発生機構を実施するための形態を図面に基づいて説明する。   EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the bubble generator and bubble generation mechanism which concern on this invention is demonstrated based on drawing.

図１〜図５は、本発明の一実施の形態を示す。図中符号１は、流路Ｘを流れる水（当然ながら湯も含むが、以下同様に、単に水と称する。）に微小なバブルを発生させるバブル発生器を示す。同様に、２は、流路Ｘを流れる水に微小なバブルを発生させるバブル発生機構を示す。   1 to 5 show an embodiment of the present invention. Reference numeral 1 in the figure denotes a bubble generator that generates minute bubbles in water flowing through the flow path X (which naturally includes hot water, but is hereinafter simply referred to as water). Similarly, 2 indicates a bubble generation mechanism that generates minute bubbles in the water flowing through the flow path X.

ここで、バブル発生器１は、前記流路Ｘを有する本体３と、絞り流路４と、旋回流形成体５とを、備える。絞り流路４は、本体３に設けられて、バブルを発生すべく、前記流路Ｘが、上流側に比して下流側が絞られて形成される（図１において、水の流れの方向を太線による矢印にて示す）。旋回流形成体５は、本体３における、前記絞り流路４の上流側に収容（図示実施の形態においては、着脱可能に収容）される。この旋回流形成体５は、下流側に旋回流を形成するよう、旋回流形成体５の中心部分を取り囲む位置において、上流側と下流側とを連通する（図示実施の形態においては、斜めに連通する）、第１貫通孔５ａ有する。さらに、旋回流形成体５は、旋回流の中心部分に水流を導くよう、旋回流形成体５の中心部分において、上流側と下流側とを連通する、第２貫通孔５ｂを有する。そして、本体３は、前記絞り流路４の下流側に、前記流路Ｘが、上流側に比して下流側が広がって形成された、広がり流路６を有する。   Here, the bubble generator 1 includes a main body 3 having the flow path X, a throttle flow path 4, and a swirl flow forming body 5. The throttle channel 4 is provided in the main body 3, and the channel X is formed with the downstream side throttled to generate bubbles (in FIG. 1, the direction of water flow is defined). (Indicated by a thick line arrow). The swirl flow forming body 5 is accommodated in the main body 3 on the upstream side of the throttle channel 4 (in the illustrated embodiment, it is detachably accommodated). The swirling flow forming body 5 communicates the upstream side and the downstream side at a position surrounding the central portion of the swirling flow forming body 5 so as to form a swirling flow on the downstream side (in the illustrated embodiment, the swirling flow forming body 5 is slanted). The first through hole 5a. Further, the swirl flow forming body 5 has a second through hole 5b that communicates the upstream side and the downstream side in the central portion of the swirl flow forming body 5 so as to guide the water flow to the central portion of the swirl flow. And the main body 3 has the spreading | diffusion channel | path 6 in which the said flow path X was formed in the downstream of the said narrowing flow path 4, and the downstream was expanded compared with the upstream.

詳細には、バブル発生器１は、前記絞り流路４を有して本体３に着脱可能に収容される絞り流路形成部材７を備えている。そして、前記絞り流路４は、下流側に向かって絞られて形成された、漸次縮径する絞りテーパー部４ａと、その絞りテーパー部４ａに続き、径が一定の第１のど部４ｂとを備える。また、前記広がり流路６は、径が一定の第２のど部６ａと、その第２のど部６ａに続き、下流側に向かって広がって形成された、漸次拡径する広がりテーパー部６ｂとを備える。そして、図示実施の形態においては、第１のど部４ｂの径に比して、第２のど部６ａの径が、若干大きく形成されている。   Specifically, the bubble generator 1 includes a throttle channel forming member 7 that has the throttle channel 4 and is detachably accommodated in the main body 3. The throttle channel 4 includes a throttle taper portion 4a formed by being narrowed toward the downstream side and gradually reducing in diameter, and a first throat portion 4b having a constant diameter following the throttle taper portion 4a. Prepare. Further, the expanding flow path 6 includes a second throat portion 6a having a constant diameter, and an expanding taper portion 6b which is formed to expand toward the downstream side, following the second throat portion 6a. Prepare. In the illustrated embodiment, the diameter of the second throat portion 6a is slightly larger than the diameter of the first throat portion 4b.

具体的には、本体３は、筒状に形成されて、その筒内には、前記絞り流路形成部材７が収容され、その絞り流路形成部材７の上流側に、前記旋回流形成体５が収容され、さらに、その旋回流形成体５の上流側に、その旋回流形成体５を抜け止めするリング状の止め部材８が嵌められる。そして、この止め部材８を外すことで、本体３から旋回流形成体５を取り外すことができ、さらには、絞り流路形成部材７を取り外すことができる。詳細には、止め部材８は、軟質材（例えば、パッキン）からなり、後述する雌ねじ３ａにねじ込まれる管状部材（図示せず）に押されて、旋回流形成体５を押圧し、その押圧により、旋回流形成体５は、回り止めされる。   Specifically, the main body 3 is formed in a cylindrical shape, and the throttle channel forming member 7 is accommodated in the cylinder, and the swirl flow forming body is disposed upstream of the throttle channel forming member 7. 5 is accommodated, and a ring-shaped stop member 8 for retaining the swirling flow forming body 5 is fitted on the upstream side of the swirling flow forming body 5. Then, by removing this stop member 8, the swirl flow forming body 5 can be removed from the main body 3, and further, the throttle channel forming member 7 can be removed. Specifically, the stop member 8 is made of a soft material (for example, packing), pressed by a tubular member (not shown) that is screwed into a female screw 3a described later, and presses the swirl flow forming body 5 by the press. The swirl flow forming body 5 is prevented from rotating.

また、本体３は、絞り流路形成部材７（つまり、絞り流路４）の下流側に、前記広がり流路６が形成され、図示実施の形態においては、この広がり流路６の第２のど部６ａと、絞り流路形成部材７の第１のど部４ｂとが、若干の隙間を隔てて対向する。また、この本体３には、本体３自身の取付のために、上流側の内周面に、雌ねじ３ａが形成され、下流側の外周面に、雄ねじ３ｂが形成される。   Further, the main body 3 is formed with the widening channel 6 on the downstream side of the throttle channel forming member 7 (that is, the throttle channel 4). In the illustrated embodiment, the second throat of the widening channel 6 is formed. The portion 6a and the first throat portion 4b of the throttle channel forming member 7 face each other with a slight gap therebetween. Further, the main body 3 is provided with a female screw 3a on the inner peripheral surface on the upstream side and a male screw 3b on the outer peripheral surface on the downstream side for mounting the main body 3 itself.

絞り流路形成部材７は、図２に示すように、筒状に形成されて、その筒内が、前述の絞りテーパー部４ａおよび第１のど部４ｂとなる。そして、絞り流路形成部材７は、絞りテーパー部４ａの側の先端に鍔部７ａを有する。   As shown in FIG. 2, the throttle channel forming member 7 is formed in a cylindrical shape, and the inside of the cylinder becomes the throttle taper portion 4a and the first throat portion 4b. The throttle channel forming member 7 has a flange portion 7a at the tip on the throttle taper portion 4a side.

旋回流形成体５は、図３および図４に示すように、円盤状に形成されて、その表裏を貫通するように、前述の第１貫通孔５ａおよび第２貫通孔５ｂがあけられる。第１貫通孔５ａは、旋回流形成体５の中心部分を取り囲むように、複数（詳しくは、四つ）設けられ、図示実施の形態においては、平面視または底面視において（図３（ａ）または（ｃ）参照）、第２貫通孔５ｂを中心として時計回り方向に進むように傾斜してあけられている。一方、第２貫通孔５ｂは、旋回流形成体５の中心部分を真っ直ぐ貫通するようにあけられている。そして、第２貫通孔５ｂは、第１貫通孔５ａよりもその径が小さく（詳しくは、断面積が小さく）形成される。なお、図中符号５ｃは、旋回流形成体５の表裏を識別するための識別表示を示し、図示実施の形態においては、突起状に形成されている。   As shown in FIGS. 3 and 4, the swirl flow forming body 5 is formed in a disk shape, and the first through hole 5 a and the second through hole 5 b described above are formed so as to penetrate the front and back surfaces thereof. The first through-hole 5a is provided in plural (specifically, four) so as to surround the central portion of the swirl flow forming body 5, and in the illustrated embodiment, in plan view or bottom view (FIG. 3A). Or (see (c)), it is inclined and opened so as to proceed clockwise around the second through hole 5b. On the other hand, the 2nd through-hole 5b is opened so that the center part of the swirling flow formation body 5 may be penetrated straight. The diameter of the second through hole 5b is smaller than that of the first through hole 5a (specifically, the cross-sectional area is small). In addition, the code | symbol 5c in a figure shows the identification display for identifying the front and back of the swirl flow formation body 5, and in the embodiment shown in figure, it is formed in protrusion shape.

バブル発生機構２は、前述した絞り流路４と、その絞り流路４の上流側に設けられる前述した旋回流形成体５とを、備える。図示実施の形態においては、これら絞り流路４と旋回流形成体５とは、本体３に設けられ、その本体３（つまりは、バブル発生器１）が、例えば、シャワー器具とか水栓とかの水栓設備に組み込まれたり、取り付けられたりする。図５は、その一例を示し、本体３（バブル発生器１）は、水栓設備において、水栓本体９と、シャワーホース１０との間に組み込まれている。もっとも、バブル発生機構２は、本体３を通じて水栓設備に組み込まれなくとも、直接水栓設備に組み込まれてもよい。   The bubble generating mechanism 2 includes the above-described throttle channel 4 and the above-described swirl flow forming body 5 provided on the upstream side of the throttle channel 4. In the illustrated embodiment, the throttle channel 4 and the swirl flow forming body 5 are provided in the main body 3, and the main body 3 (that is, the bubble generator 1) is, for example, a shower device or a faucet. Incorporated into or attached to faucet equipment. FIG. 5 shows an example, and the main body 3 (bubble generator 1) is incorporated between the faucet main body 9 and the shower hose 10 in the faucet equipment. However, the bubble generating mechanism 2 may not be incorporated into the faucet equipment through the main body 3 but may be incorporated directly into the faucet equipment.

次に、以上の構成からなるバブル発生器１およびバブル発生機構２の作用効果について説明する。絞り流路４の上流側には、旋回流形成体５が設けられる（詳しくは、本体３に、絞り流路４が設けられ、その絞り流路４の上流側に、旋回流形成体５が収容される）。この旋回流形成体５は、中心部分を取り囲む位置に、第１貫通孔５ａを有し、この第１貫通孔５ａにより、旋回流形成体５の下流側に旋回流が形成される。そこで、絞り流路４によって発生するバブルは、この旋回流により、細かくせん断される。そして、旋回流形成体５は、中心部分に、第２貫通孔５ｂを有し、この第２貫通孔５ｂにより、旋回流の中心部に水流が導かれる。これにより、旋回流と、その旋回流の中心部に導かれる水流とが、擦れ合い、バブルは、より細かくせん断される。つまり、旋回流の中心部に導かれる水流が、旋回流とは別のせん断流となって、バブルがより細かくせん断されることとなる。こうして、旋回流形成体５に、旋回流を形成するための第１貫通孔５ａを設けるとともに、旋回流形成体５の中心部分に第２貫通孔５ｂを設けて、旋回流と中心部の水流とを擦り合わせることで、発生するバブルをより細かくせん断して、微小なバブルの量を増やすことができる。   Next, the effect of the bubble generator 1 and the bubble generation mechanism 2 which consist of the above structure is demonstrated. A swirl flow forming body 5 is provided on the upstream side of the throttle flow path 4 (specifically, the narrow flow path 4 is provided in the main body 3, and the swirl flow forming body 5 is disposed on the upstream side of the throttle flow path 4. Housed). The swirl flow forming body 5 has a first through hole 5a at a position surrounding the central portion, and a swirl flow is formed on the downstream side of the swirl flow forming body 5 by the first through hole 5a. Therefore, the bubbles generated by the throttle channel 4 are finely sheared by this swirling flow. Then, the swirl flow forming body 5 has a second through hole 5b in the central portion, and the water flow is guided to the central part of the swirl flow by the second through hole 5b. Thereby, a swirl flow and the water flow guide | induced to the center part of the swirl flow mutually rub, and a bubble is sheared more finely. That is, the water flow guided to the central portion of the swirl flow becomes a shear flow different from the swirl flow, and the bubbles are sheared more finely. Thus, the swirling flow forming body 5 is provided with the first through hole 5a for forming the swirling flow, and the second through hole 5b is provided in the central portion of the swirling flow forming body 5, so , The generated bubbles can be sheared more finely, and the amount of minute bubbles can be increased.

また、絞り流路４を有する絞り流路形成部材７を、本体３に着脱可能に設けることで、絞り流路４につき各種サイズ、形状からなる絞り流路形成部材７、７を用意し、それら絞り流路形成部材７、７の一つを選択して使用したり、それら絞り流路形成部材７、７を取り換えて使用することで、絞り流路４にて発生する負圧の大きさを変えてバブルの量を変化させたり、水の流量を変化させたりすることができる。   Further, by providing a throttle channel forming member 7 having a throttle channel 4 detachably to the main body 3, throttle channel forming members 7, 7 having various sizes and shapes are prepared for the throttle channel 4. The size of the negative pressure generated in the throttle channel 4 can be reduced by selecting and using one of the throttle channel members 7 and 7 or by replacing the throttle channel members 7 and 7. You can change it to change the amount of bubbles or change the flow rate of water.

なお、本発明は、上述した実施の形態に限定されるわけではなく、その他種々の変更が可能である。例えば、第２のど部６ａの径は、第１のど部４ｂの径よりも若干大きくなっているが、これらは、同じであってもよく、また、大小が逆転していてもよい。   In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the diameter of the second throat portion 6a is slightly larger than the diameter of the first throat portion 4b, but these may be the same or may be reversed in size.

また、絞り流路４は、絞り流路形成部材７に設けられるが、この絞り流路形成部材７を備えることなく、絞り流路４が、本体３に直接形成されてもよい。   The throttle channel 4 is provided in the throttle channel forming member 7, but the throttle channel 4 may be formed directly in the main body 3 without providing the throttle channel forming member 7.

また、絞り流路４は、バブルを発生させることができるものであればよく、絞りテーパー部４ａと第１のど部４ｂとの構成に限定されるものではない。また、第２のど部６ａは、便宜上、広がり流路６の始まりの部分として捉えたが、この第２のど部６ａにおいても、第１のど部４ｂと同様に、バブルが発生するため、第２のど部６ａを、絞り流路４の一部として捉えてもよい。   Further, the throttle channel 4 is not limited to the configuration of the throttle taper portion 4a and the first throat portion 4b as long as it can generate bubbles. Further, the second throat portion 6a is regarded as the beginning portion of the spreading flow path 6 for convenience, but in the second throat portion 6a as well as the first throat portion 4b, bubbles are generated. The throat portion 6 a may be regarded as a part of the throttle channel 4.

また、旋回流形成体５において、第２貫通孔５ｂは、第１貫通孔５ａよりもその径が小さく（詳しくは、断面積が小さく）形成されるが、それらは、同じであってもよく、また、大小が逆転していてもよい。もっとも、十分な旋回流を得るためには、相対的に、第１貫通孔５ａが大きく第２貫通孔５ｂが小さく形成されるのがよい。   Further, in the swirl flow forming body 5, the second through hole 5b is formed with a smaller diameter (specifically, a smaller cross-sectional area) than the first through hole 5a, but they may be the same. Also, the magnitude may be reversed. However, in order to obtain a sufficient swirl flow, it is preferable that the first through hole 5a is relatively large and the second through hole 5b is relatively small.

また、旋回流形成体５における第１貫通孔５ａは、図６および図７に示すように、上流側と下流側とを斜めに連通するよう螺旋状にあけられてもよい。図示実施の形態においては、第１貫通孔５ａは、複数（詳しくは、二つ）設けられ、それら第１貫通孔５ａ、５ａを仕切る隔壁５ｄ、５ｄが、螺旋状に形成される。そして、第１貫通孔５ａ、５ａは、旋回流形成体５の中心から離れた側の面５ｅ、５ｅが、上流側に比して下流側が径小となるようにテーパー状に対面形成されている。   Further, as shown in FIGS. 6 and 7, the first through hole 5 a in the swirl flow forming body 5 may be formed in a spiral shape so as to communicate the upstream side and the downstream side obliquely. In the illustrated embodiment, a plurality (specifically, two) of first through holes 5a are provided, and partition walls 5d and 5d that partition the first through holes 5a and 5a are formed in a spiral shape. The first through holes 5a and 5a are formed so as to face each other in a tapered shape such that the surfaces 5e and 5e on the side away from the center of the swirling flow forming body 5 have a diameter smaller on the downstream side than on the upstream side. Yes.

また、第１貫通孔５ａは、下流側に旋回流を形成するものであれば、上流側と下流側とを斜めに連通するものでなくとも、その第１貫通孔５ａにおける上流側にある入口と下流側にある出口とが、旋回流の回転の方向にずれていればよい。図８および図９は、その一例を示し、第１貫通孔５ａは、上流側において真っ直ぐあけられ、下流側の出口部分に、旋回流の回転の方向に突出する段部５ｆを有するとともに、その段部５ｆと対向する側に面取り５ｇが施されている。   Moreover, if the 1st through-hole 5a forms a swirling flow in the downstream, even if it does not connect the upstream and the downstream diagonally, the inlet located in the upstream in the 1st through-hole 5a And the outlet on the downstream side only need to be shifted in the direction of rotation of the swirl flow. FIG. 8 and FIG. 9 show an example, and the first through hole 5a has a stepped portion 5f that is straight open on the upstream side and protrudes in the direction of rotation of the swirling flow at the downstream outlet portion. A chamfer 5g is provided on the side facing the step portion 5f.

また、旋回流形成体５における第２貫通孔５ｂは、円形に限らず、方形等その他の形状
に形成されてもよい。また、第２貫通孔５ｂは、真っ直ぐ貫通するようにあけられなくとも、例えば、先細りあるいは先太りのテーパー状にあけられてもよい。 Moreover, the 2nd through-hole 5b in the swirl | vortex flow formation body 5 may be formed in other shapes, such as not only circular but square. Further, the second through hole 5b may be formed in a tapered shape or a tapered shape, for example, even if it is not formed so as to penetrate straight.

１ バブル発生器
２ バブル発生機構
３ 本体
４ 絞り流路
５ 旋回流形成体
５ａ 第１貫通孔
５ｂ 第２貫通孔
６ 広がり流路
７ 絞り流路形成部材
Ｘ 流路 DESCRIPTION OF SYMBOLS 1 Bubble generator 2 Bubble generation mechanism 3 Main body 4 Restriction flow path 5 Swirling flow formation body 5a 1st through-hole 5b 2nd through-hole 6 Spreading flow path 7 Restriction flow-path formation member X flow path

Claims (4)

流路を流れる水に微小なバブルを発生させるバブル発生器であって、
前記流路を有する本体と、
前記本体に設けられて、前記バブルを発生すべく、前記流路が、上流側に比して下流側が絞られて形成された、絞り流路と、
前記本体における、前記絞り流路の上流側に収容される、旋回流形成体とを、備え、
前記旋回流形成体は、下流側に旋回流を形成するよう、前記旋回流形成体の中心部分を取り囲む位置において、上流側と下流側とを連通する、第１貫通孔を有し、また、
前記旋回流形成体は、前記旋回流の中心部に水流を導くよう、前記旋回流形成体の中心部分において、上流側と下流側とを連通する、第２貫通孔を有する、バブル発生器。 A bubble generator that generates minute bubbles in water flowing through a flow path,
A body having the flow path;
A throttle channel provided in the main body and formed so that the downstream side is throttled compared to the upstream side to generate the bubbles, and
A swirl flow forming body, which is accommodated on the upstream side of the throttle channel in the main body,
The swirling flow forming body has a first through hole that communicates the upstream side and the downstream side at a position surrounding the central portion of the swirling flow forming body so as to form a swirling flow downstream.
The swirl flow forming body has a second through-hole that communicates an upstream side and a downstream side in a central portion of the swirl flow formation body so as to guide a water flow to a central part of the swirl flow. 前記絞り流路を有して前記本体に着脱可能に収容される絞り流路形成部材を備える、請求項１に記載のバブル発生器。   The bubble generator according to claim 1, further comprising a throttle channel forming member that has the throttle channel and is detachably accommodated in the main body. 前記本体は、前記絞り流路の下流側に、前記流路が、上流側に比して下流側が広がって形成された、広がり流路を有する、請求項１または２に記載のバブル発生器。   3. The bubble generator according to claim 1, wherein the main body has an expanded flow path formed on the downstream side of the throttle flow path, the flow path being formed so that the downstream side is wider than the upstream side. 4. 流路を流れる水に微小なバブルを発生させるバブル発生機構であって、
前記バブルを発生すべく、前記流路が、上流側に比して下流側が絞られて形成された、絞り流路と、
前記絞り流路の上流側に設けられる旋回流形成体とを、備え、
前記旋回流形成体は、下流側に旋回流を形成するよう、前記旋回流形成体の中心部分を取り囲む位置において、上流側と下流側とを連通する、第１貫通孔を有し、また、
前記旋回流形成体は、前記旋回流の中心部に水流を導くよう、前記旋回流形成体の中心部分において、上流側と下流側とを連通する、第２貫通孔を有する、バブル発生機構。 A bubble generating mechanism that generates minute bubbles in water flowing through a flow path,
In order to generate the bubble, the flow path is formed by narrowing the downstream side compared to the upstream side,
A swirl flow forming body provided on the upstream side of the throttle channel,
The swirling flow forming body has a first through hole that communicates the upstream side and the downstream side at a position surrounding the central portion of the swirling flow forming body so as to form a swirling flow downstream.
The swirl flow forming body has a second through hole that communicates an upstream side and a downstream side in a central portion of the swirl flow forming body so as to guide a water flow to a central part of the swirl flow.
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