JP2007050341A - Micro bubble generator and shower apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a micro bubble generator by which higher washing effect to an object to be washed can be obtained by arbitrarily changing amount of bubbles and a bubble diameter. <P>SOLUTION: The micro bubble generator is provided with a flow straightening body 9 disposed in a flow straightening tube 8 and a pressure reducing mechanism 2 provided at a downstream side of the flow straightening body 9. The flow straightening body 9 is constituted by stacking a plurality of flow straightening plates 12 of the same shape in which a plurality of openings 11 penetrating from an upstream side to a downstream side are provided and respective flow straightening plates 12 are disposed with shifting in a peripheral direction. From an opening 16 of the flow straightening plate 12 at the most upstream side to an opening 17 of the flow straightening plate 15 at the most downstream side are communicated with each other as a twisted passage 18 and thereby strength of negative pressure produced in the pressure reducing mechanism 2 can be made changeable and the amount of bubbles and the bubble diameter can be easily changed by arbitrarily changing twisting inclination of the twisted passage 18 of the flow straightening body 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fine bubble generator and a shower device provided with the fine bubble generator.

Conventionally, this type of microbubble generator is disclosed in Patent Document 1. As shown in FIGS. 8 and 9, the gas-liquid mixed fluid 90 pressurized and dissolved by a pump or the like is discharged from the jet outlet 91, and the inlet 92 and outlet 93 of the jet outlet 91 are discharged. A gas suction port 94 provided therebetween, an on-off valve 95 for opening and closing the gas suction port 94, and a position upstream of the position where the gas suction port 94 of the jet port 91 merges flows into the jet port 91. It consists of a rectifier 98 in which a twisted through-hole 97 for generating a vortex 96 in the liquid is formed. The purpose is to switch the bubble 99 between a fine bubble and a large bubble by an on-off valve 95. When the on-off valve 95 is closed, fine bubbles are generated, and when the on-off valve 95 is in the open state, communication between the outside air and the inside of the jet outlet 91 is established, and the gas-liquid mixed fluid 90 is commutated body 98. From the twisted through hole 97 in the spout 91 It adapted to generate a vortex 96 when it flows. However, although it is a known technique to generate the bubble 99 by generating the vortex 96, when this vortex passes through the junction with the second suction port 100, it passes through the junction in a DC state. As a result, a stronger negative pressure is generated, and a larger amount of gas is sucked from the outside air. As a result, the bubble diameter and amount of the bubbles 99 can be increased.
Japanese Patent No. 3264714

  However, in the case of the above-described conventional fine bubble generating device, the twist inclination of the through hole 97 of the rectifying body 98 is a single type, and in order to change the suction amount of gas from the outside air and the bubble diameter of the bubble 99, It is necessary to replace it with another rectifier having a through hole with a different twist inclination. Therefore, the rectifying body 98 becomes uniform according to the required amount of air suction, and hence the bubble diameter of the bubble 99, and the required amount itself. When changing the state of the bubble 99, there are many types of rectifying body 98. It was necessary to prepare. Further, when the twisted through hole 97 of the rectifying body 98 is molded, there is a problem that press molding in a single process is difficult and the processing becomes complicated.

  The present invention solves the above-described conventional problems, and can form a torsion passage having an arbitrary inclination in the rectifying body without increasing the type of the rectifying body and by easy processing, and can arbitrarily set the bubble amount and the bubble diameter. It is an object of the present invention to provide a microbubble generator that can be changed to a variable, and to provide a shower device using the microbubble generator.

  In order to solve the above-described conventional problems, the microbubble generator of the present invention includes a rectifier disposed in a rectifier provided on the downstream side of a flow of a gas-liquid mixed fluid in which a gas is dissolved in a liquid, and a rectifier. Provided with a decompression mechanism composed of a Venturi tube provided on the downstream side of the fluid, the rectifying body is configured by laminating a plurality of rectifying plates of the same shape provided with a plurality of openings penetrating from the upstream side to the downstream side, The rectifying plates are arranged in a circumferential direction and communicated as a torsion passage from the opening of the rectifying plate on the most upstream side to the opening of the rectifying plate on the most downstream side.

  Further, a shower head provided with a plurality of ejection holes is provided on the downstream side of the fine bubble generating device.

  In this way, by forming a rectifying body by laminating a plurality of identical rectifying plates by shifting them in the circumferential direction at a certain ratio, a torsion passage having a certain torsional inclination can be formed. In the case of a rectifying body with a changed torsional inclination, the rectifying plate is similarly laminated by changing the ratio of shifting each rectifying plate in the circumferential direction, so that it has the same rectifying plate but has a different torsional inclination. A rectifier having a twisted torsion passage can be configured. In this way, since the torsional inclination of the torsion passage of the rectifying body can be easily changed, the swirling state of the swirling flow generated on the downstream side of the rectifying body is changed, and the decompression mechanism is configured by the Venturi tube, thereby adjusting the state. After the gas-liquid mixed water flow flows out as a swirling flow, the fluid is compressed rapidly when passing through the narrowest part of the Venturi tube, and then cavitation is generated by the negative pressure generated by abrupt diffusion at the tapered portion. As a result, a liquid flow containing fine bubbles can be generated.

  In this way, the fine pressure can be changed easily by changing the cavitation state of the gas-liquid mixed fluid generated at the downstream side of the decompression mechanism by changing the strength of the negative pressure generated by the decompression mechanism. A generator can be provided.

  In addition, in the case of a gas-liquid mixed fluid in which the gas is air and the liquid is warm water, a fine bubble is contained by arranging a shower head provided with a plurality of ejection holes on the downstream side of the fine bubble generator. A shower water flow can be generated, and a skin surface cleaning effect and a heat retaining effect can be obtained by a synergistic action of a shock wave generated when microbubbles burst on the skin surface of a human body and the water flow of the shower water flow.

  The fine bubble generator of the present invention can arbitrarily change the twist inclination of the twist passage of the rectifier by laminating the rectifiers by laminating a plurality of rectifiers of the same shape in the circumferential direction at a constant angle. As a result, the strength of the negative pressure generated by the decompression mechanism provided on the downstream side of the rectifier can be varied, and the amount of bubbles and the bubble diameter can be easily changed according to the object. In the case of a gas-liquid mixed fluid in which the gas is air and the liquid is hot water, the microbubbles burst on the skin surface of the human body by arranging a shower head downstream of the microbubble generator. Due to the synergistic effect of the shock wave generated in the water and the water flow of the shower water flow, a skin surface cleaning effect and a heat retaining effect can be obtained.

  1st invention is equipped with the rectification body arrange | positioned in the rectification pipe | tube which distribute | circulates a gas-liquid mixed fluid, and the pressure reduction mechanism provided in the downstream of the rectification body, and the rectification body is several opening penetrated from the upstream to the downstream A plurality of identically shaped rectifying plates provided with a portion are laminated, and each rectifying plate is arranged in the circumferential direction so that the opening of the rectifying plate on the most upstream side is opened to the opening of the rectifying plate on the most downstream side. It is possible to arbitrarily change the torsional inclination of the torsion path of the rectifying body by communicating as a torsion path, and as a result, the swirl state of the swirling flow generated on the downstream side of the rectifying body is changed, The strength of the negative pressure generated by the decompression mechanism provided on the downstream side of the rectifier can be varied, and the amount of bubbles and the bubble diameter can be easily changed. Furthermore, it is also possible to laminate | stack so that the position of the several opening part of each rectifying body may correspond, In that case, a gas-liquid mixed fluid can be passed through the rectifying body in the state close | similar to a linear flow.

  The second invention is the first invention, in particular, wherein the rectifier is configured to rectify a plurality of rectifying plates having the same shape and provided with a plurality of concave portions and convex portions arranged at a constant angle in the circumferential direction. In the piping, from the upstream side to the downstream side, by sequentially laminating and laminating by a certain angle in the circumferential direction, the multiple angles of the multiple concave and convex portions of each rectifying plate are circumferentially multiplied, and sequentially By simply laminating in the circumferential direction, the torsional inclination of the torsion path of the rectifier can be easily changed, and as a result, the swirl state of the swirling flow generated downstream of the rectifier is changed, The strength of the negative pressure generated by the provided decompression mechanism can be varied, and the amount of bubbles and the bubble diameter can be easily changed.

  The third invention is the second invention, in particular, in the second invention, a plurality of convex portions arranged at a constant angle in the circumferential direction so as to match the plurality of concave portions and convex portions of the rectifier on the inner peripheral portion of the rectifying tube By configuring the recesses, the plurality of convex portions of the rectifying tube are fitted into the plurality of concave portions disposed on the outer peripheral portion of the rectifying plate, and the plurality of convex portions disposed on the outer peripheral portion of the rectifying plate are A plurality of recesses are fitted, and each rectifying plate can be reliably positioned and fixed.

  According to a fourth aspect of the present invention, there is provided a gas-liquid mixing device for dissolving a gas in a liquid, and a plurality of jet holes on the downstream side of the microbubble generator described in any one of the first to third inventions on the downstream side thereof. By providing the shower head provided with a high cleaning effect on the object can be obtained by the synergistic action of the shock wave generated when the fine bubbles burst on the surface of the object and the flow of the shower.

  The fifth aspect of the invention relates to the shower apparatus of the fourth aspect of the invention, in particular, when the shower head is directly connected to the outlet side of the fine bubble generating device, and the pipe length between the shower head and the fine bubble generating device is long. In comparison, since the amount of bubbles can be maintained by minimizing the spontaneous disappearance of the generated fine bubbles, the effect of cleaning the surface of the object can be enhanced as a result.

  In the sixth aspect of the invention, in particular, in the shower device of the fourth or fifth aspect of the invention, by supplying warm water as the liquid to be supplied to the gas-liquid mixing device, for example, when the gas is air, the fine bubbles are the skin surface of the human body, etc. The skin surface has a high cleaning effect and heat retention effect due to the synergistic effect of the shock wave generated when bursting and the water flow of the shower warm water flow. Further, by connecting the shower head and the fine bubble generating device with a hose or the like, a commercially available shower set can be applied, and versatility is expanded.

  According to a seventh aspect of the invention, in the shower device of any one of the fourth to sixth aspects of the invention, an oxygen enrichment device is provided upstream of the gas-liquid mixing device, and oxygen as a gas has a higher concentration than the oxygen concentration in the air. By supplying the contained air to the gas-liquid mixing device, not only can the skin surface of the human body be highly cleaned and kept warm, but also a relatively high concentration of oxygen in the bathroom when showering in the bathroom. Therefore, discomfort caused by water vapor filling the bathroom can be alleviated.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a main part of a microbubble generator according to Embodiment 1 of the present invention, FIG. 2 is a front view of the rectifier body according to the same embodiment as viewed from the upstream side, and FIG. FIG. 4 is an enlarged front view showing another stacked state of the rectifying body in the same embodiment, and FIG. 4 is a front enlarged view showing another stacked state of the rectifying body in the same embodiment.

  1, 2, 3, and 4, the microbubble generator 1 includes a decompression mechanism 2 made of a metal such as brass or stainless steel, or a hard resin, and a similar material connected to the upstream side of the decompression mechanism 2. The rectifying unit 3 is configured.

  Of these, the pressure reducing mechanism 2 is a venturi tube 7 in which a tapered portion 4 whose inner diameter gradually narrows from the upstream side, a narrowest portion 5 at the middle portion, and a tapered portion 6 whose inner diameter gradually increases at the downstream side are arranged. It is composed. The rectifying unit 3 includes a rectifying pipe 8 that forms an outer shell, a rectifying body 9 provided in the rectifying pipe 8, and fixing for fixing the rectifying body 9 to the downstream side of the rectifying pipe 8 and the upstream side of the venturi pipe 7. It consists of a tube 10.

Further, the rectifying body 9 is made of a metal such as brass or stainless steel provided with openings 11 formed by four circular holes arranged at a constant angle A ° (90 ° in the present embodiment) in the circumferential direction. Or four substantially disc-shaped rectifying plates 12, 13, 14, and 15 made of hard resin are laminated at a certain angle B ° (5 ° in the present embodiment) in the circumferential direction and laminated. Upstream current plate 1
From the two openings 16 to the opening 17 of the rectifying plate 15 on the most downstream side, four torsion passages 18 are communicated.

  Further, on the outer periphery of the rectifying plates 12, 13, 14, and 15, a plurality of rectifying body recesses 19 disposed at a constant angle B ° (5 ° in the present embodiment) in the circumferential direction, A plurality of rectifying tube protruding portions 21 are formed on the inner peripheral portion of the downstream side of the rectifying tube 8 at a constant angle B ° (5 ° in the present embodiment). The rectifying tube concave portion 22 is configured, and the rectifying tube convex portions 21 are fitted in the concave portions 19 of the plurality of rectifying bodies disposed on the outer peripheral portion of the rectifying plate 8, so that the plural The rectifying tube recess 22 is fitted to the convex portion 20 of the rectifier. At this time, the rectifying plates 12, 13, 14, and 15 are laminated while being shifted by a certain angle C ° (5 ° in the present embodiment) in the circumferential direction. The four rectifying plates 8 configured as described above are securely stacked and fixed by the fixed pipe 6 provided in the rectifying pipe 8 and the elastic fixed ring 23 provided on the upstream side of the venturi pipe 2. The rectifying body 9 is configured by.

  The operation and action of the fine bubble generator configured as described above will be described below.

  A plurality of rectifying plates 12, 13, 14, 15 having the same shape are laminated at a certain angle C ° (C ° = 5 °) in the circumferential direction to form a rectifying body 9, thereby providing a constant twist inclination. Four torsion passages 18 can be formed. In this embodiment, A ° is set to 90 ° and B ° is set to 5 °. However, it can be arbitrarily changed including the number of openings 11 of the rectifying plates 12, 13, 14, and 15. Is possible.

  In this state, the gas-liquid mixed fluid 24 formed by pressurizing and dissolving air in water using air as the gas and water as the liquid flows in from the upstream side of the rectifying pipe 8, and By passing through the torsion passage 18, the gas-liquid mixed fluid 24 that has flowed out along the torsional inclination of the torsion passage 18 interferes with each other to form a swirl flow state, and from the downstream side of the rectifier 9, the venturi pipe 7 It flows out upstream.

  Further, the gas-liquid mixed fluid 23 in the swirling flow state is compressed rapidly when passing through the narrowest portion 5 of the Venturi tube 7, and then, due to the negative pressure generated by abrupt diffusion after the tapered portion 6, A part of the air dissolved in the gas-liquid mixed fluid 23 becomes supersaturated and changes into a large number of fine bubbles 25. Therefore, the gas-liquid mixed fluid 24 flows out in a state of being milky white and mixed with a large amount of fine bubbles 25 on the downstream side of the venturi tube 7.

  On the other hand, as shown in FIG. 4, each rectifying plate 12, 13, 14, 15 is laminated at a certain angle D ° (D ° = 10 °) in the circumferential direction to form a rectifying body 26. The four twist passages 27 having other twist inclinations can be formed. In this case, the torsional inclination of the torsion passage 27 becomes larger than the torsional inclination of the torsion passage 18 in the case shown in FIG. 1, and the degree of swirling of the gas-liquid mixed fluid 24 can be increased. As a result, the venturi tube 7 By changing the negative pressure generated after the taper portion 6 to form different cavitation states, the bubble diameter and bubble amount of the fine bubbles 25 can be changed.

  In this way, the strength of the negative pressure generated in the decompression mechanism 2 with different torsional inclinations can be varied while using the state in which the laminated state of the same current plate 12, 13, 14, 15 is shifted in the circumferential direction and laminated. Like the gas-liquid mixed fluid 24 generated on the downstream side of the decompression mechanism 2, the cavitation state can be varied to easily change the bubble diameter and the bubble amount of the fine bubble 25. Can be provided.

(Embodiment 2)
FIG. 5 is a conceptual diagram of a shower device 31 in which the fine bubble generating device 1 according to Embodiment 1 of the present invention is built in the gas water heater 30.

  In FIG. 5, the gas water heater 30 includes a gas burner 32, a heat exchanging unit 36 having a large number of bent portions 33 and a plurality of heat collecting fins 35 integrally formed above the gas burner 32, Gas-liquid mixing device 37 provided on the downstream side of the heat exchanging section 36, the fine bubble generating device 1 according to the present invention connected to the downstream side of the gas-liquid mixing device 37, and pressurized air are fed into the gas-liquid mixing device 37 The air pump 38 is built in the main body case 39. The gas-liquid mixing device 37 is provided with an exhaust pipe 40 for discharging excess air that could not be completely dissolved in water, and faces the outside air from the main body case 39.

  On the other hand, a shower head 43 having a plurality of ejection holes 42 is formed on the distal end side of the hot water supply pipe 41 connected to the downstream side of the fine bubble generating device 1.

  The shower device 31 includes the above configuration.

  In the present embodiment, the gas burner 32 is used as a heating source. However, it may be an oil burner or an electric heater, and various types of energy used for heating can be selected.

  Note that components having the same reference numerals as those in Embodiment 1 have the same structure, and description thereof is omitted.

  About the shower apparatus 31 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As shown in FIG. 5, when water is supplied as a liquid stream 43 into the water supply pipe 34, the gas is supplied to the gas burner 32 and ignited in the gas burner 32, and the combustion heat of the gas burner 32 is supplied through the heat collecting fins 35. Absorbed by the liquid stream 44 in the tube 34. The liquid stream 44 heated to a certain temperature flows into a gas-liquid mixing device 37 provided on the downstream side of the heat exchange unit 36.

  On the other hand, pressurized air from the air pump 38 is pumped into the gas-liquid mixing device 37, the pressurized air is forcibly dissolved in the liquid flow 44 flowing into the gas-liquid mixing device 37, and the liquid flow 44 is gas-liquid. It reaches the inside of the fine bubble generator 1 as the mixed fluid 45. Further, excess air that could not be dissolved in the liquid flow 44 is discharged from the exhaust pipe 40 into the outside air.

  The gas-liquid mixed fluid 45 that has flowed into the fine bubble generating device 1 in this way includes fine bubbles (not shown) having a certain amount and a certain range of bubble diameter distribution by the action described in the first embodiment. As a result, it circulates in the hot water supply pipe 41 and is ejected as a shower water flow 46 from the ejection hole 42 of the shower head 43 provided at the tip side thereof, and the fine bubbles in the shower water flow 46 collide with the surface of the object. A high cleaning effect on the object can be obtained by the synergistic action of the shock wave generated when bursting and the flow of the shower. In particular, when the object is the skin surface of a human body, not only a high cleaning effect but also a heat retention effect for a relatively long time can be obtained.

(Embodiment 3)
FIG. 6 is a conceptual diagram of a shower device 52 in which the fine bubble generating device 1 according to Embodiment 1 of the present invention is disposed immediately before the shower head 51 connected to the gas water heater 50.

In FIG. 6, a gas water heater 50 is integrated with a gas burner 53, a water supply pipe 55 having a large number of curved portions 54, and a large number of heat collecting fins 56 above the gas burner 53, as in the second embodiment. A heat exchange unit 57 configured, a gas-liquid mixing device 58 provided on the downstream side of the heat exchange unit 57, and
An air pump 59 for sending pressurized air into the gas-liquid mixing device 58 is built in the main body case 60.

  Furthermore, a shower head 51 having a plurality of ejection holes 62 formed at the tip end portion of the hot water supply pipe 61 connected to the downstream side of the gas-liquid mixing device 58 is formed. The fine bubble generator 1 is directly connected.

  The shower device 52 includes the above configuration.

  Note that components having the same reference numerals as those in Embodiment 1 have the same structure, and description thereof is omitted.

  About the shower apparatus 52 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As shown in FIG. 6, the hot water heated by the gas water heater 50 reaches the gas-liquid mixing device 58 and passes through the hot water supply pipe 61 as a gas-liquid mixed fluid 63 in which air is pressurized and dissolved. It flows into the fine bubble generator 1 directly connected to the head 51.

  At this time, the gas-liquid mixed fluid 63 that has flowed into the fine bubble generating device 1 is fine and has a certain amount and a certain range of bubble diameter distribution from the ejection holes 62 of the shower head 51 by the action described in the first embodiment. It is ejected as a shower water flow 64 containing bubbles (not shown).

  At this time, the generated fine bubbles (not shown) have less natural disappearance than the case where the pipe length between the shower head 51 and the fine bubble generating device 1 is long, and the required amount of bubbles can be maintained. Therefore, a high synergy between the shock wave generated when microbubbles (not shown) burst on the surface of the object and the flow of the shower water flow 64 is obtained, and a higher cleaning effect on the object is obtained. In particular, when the object is the skin surface of a human body, not only a high cleaning effect but also a long-term heat retention effect can be obtained.

(Embodiment 4)
FIG. 7 is a conceptual diagram of shower device 70 according to Embodiment 2 of the present invention.

  In FIG. 7, the difference from the second embodiment is that an oxygen enrichment device 71 is disposed upstream of an air pump 38 that feeds pressurized air into the gas-liquid mixing device 37.

  In addition, the thing of the same code | symbol as Embodiment 1, 2 has the same structure, and abbreviate | omits description.

  About the shower apparatus 70 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In substantially the same manner as in the second embodiment, a shower water flow 72 containing fine bubbles (not shown) having a certain amount and a certain range of bubble diameter distribution is ejected from the ejection holes 42 of the shower head 43. At this time, air having an oxygen concentration higher than the oxygen concentration in the air (for example, 25 to 35%) becomes fine bubbles (not shown) in the shower water flow 72 by the action of the oxygen enricher 71. Therefore, when the shower head 43 is provided in a bathroom or the like, not only a high cleaning effect and a heat retaining effect on the skin surface of the human body can be obtained, but also when the shower water flow 72 is used, Since relatively high concentration of oxygen is released, the uncomfortable feeling caused by water vapor filling the bathroom can be alleviated, and the environment in the bathroom can be made comfortable.

  As described above, since the fine bubble generating device according to the present invention can easily change the bubble amount and the bubble diameter according to the object, only the human body can be selected by appropriately selecting the combination of gas and liquid. It can be applied not only to washing various objects, but also to many uses such as a dishwasher, a washing machine, and an industrial washing machine as well as a shower device.

1 is a longitudinal sectional view of a main part of a fine bubble generating apparatus according to Embodiment 1 of the present invention. The front view which looked at the rectifier in Embodiment 1 of this invention from the upstream The detailed front view which shows the fixed lamination | stacking state of the baffle plate in Embodiment 1 of this invention The detailed front view which shows the other lamination | stacking state of the baffle plate in Embodiment 1 of this invention Conceptual diagram of shower device in Embodiment 2 of the present invention Conceptual diagram of shower apparatus in Embodiment 3 of the present invention Conceptual diagram of shower device in Embodiment 4 of the present invention Longitudinal cross-sectional view of a conventional microbubble generator The front view which looked at the rectifier in the conventional fine bubble generator from the upstream side

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fine bubble generator 2 Pressure reducing mechanism 7 Venturi tube 8 Rectifier tube 9, 25 Rectifier 11 Opening portion 12, 13, 14, 15 Rectifier plate 16 Opening portion of the most upstream flow straightener plate 17 Opening of the downstreammost flow straightener plate Portions 18 and 26 Twisted passage 19 Convex part of rectifier 20 Convex part of rectifier 21 Convex part of rectifier pipe 22 Concave part of rectifier pipe 24, 45, 63 Gas-liquid mixed fluid 31, 52, 70 Shower device 37, 58 Gas-liquid mixture Device 42, 62 Ejection hole 43, 51 Shower head 71 Oxygen enrichment device

Claims (7)

A rectifying body disposed in a rectifying pipe through which a gas-liquid mixed fluid flows and a decompression mechanism constituted by a venturi pipe provided on the downstream side of the rectifying body, the rectifying body having a plurality of openings penetrating from the upstream side to the downstream side A plurality of the same-shaped rectifying plates provided with a plurality of rectifying plates are laminated, and the respective rectifying plates are arranged to be shifted in the circumferential direction from the opening of the rectifying plate on the most upstream side to the opening of the rectifying plate on the most downstream side. A microbubble generator that communicates up to a twist path. The rectifier is composed of a plurality of concave and convex portions arranged at a constant angle in the circumferential direction, and a plurality of rectifying plates having the same shape provided on the outer peripheral portion. The fine bubble generating device according to claim 1, wherein the fine bubble generating device is configured by laminating and deviating from each other. The microbubble according to claim 2, wherein the inner peripheral portion of the rectifying tube is configured with a plurality of convex portions and concave portions arranged at a constant angle in the circumferential direction so as to match the plurality of concave portions and convex portions of the rectifying body. Generator. A gas-liquid mixing device for dissolving gas in a liquid, a fine bubble generating device according to any one of claims 1 to 3 provided downstream thereof, and a plurality of jets downstream of the fine bubble generating device A shower device provided with a shower head provided with holes. The shower apparatus of Claim 4 which connected the shower head directly to the exit side of the fine bubble generator. The shower apparatus of Claim 4 or 5 which supplies warm water as a liquid supplied to a gas-liquid mixing apparatus. The oxygen-enriching device is provided upstream of the gas-liquid mixing device, and air containing oxygen at a concentration higher than the oxygen concentration in the air is supplied to the gas-liquid mixing device. Shower equipment.

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