JP4305178B2 - Oxygen enriched bathtub equipment - Google Patents

Description

  The present invention relates to an oxygen-enriched bathtub apparatus that pressurizes and mixes high-concentration oxygen in a circuit that circulates hot water in a bathtub and discharges the hot water in the bathtub as fine bubbles.

Some conventional oxygen-enriched bathtub apparatuses supply high-concentration oxygen to bathtub water in a bathtub hot water circulation circuit (see, for example, Patent Document 1). FIG. 9 shows a conventional oxygen-enriched bathtub apparatus described in Patent Document 1. As shown in FIG. 9, a pump 2 that circulates hot water in the bathtub 1 and a supply unit 4 that supplies gas to the pipe line 3 are provided, and an oxygen enrichment device 5 that supplies oxygen-enriched air to the supply unit 4 is provided. The bathtub 1 is provided with a suction port 6 and a blowing nozzle 7. A normal bathtub hot water circulation device is installed near the bathtub 1 in the bathroom 8.
JP-A-4-2347

  However, the conventional oxygen supply device of Patent Document 1 has a configuration in which a bath water circulation circuit and an oxygen enrichment device are installed in the bathroom 8 to supply high-concentration oxygen to a circuit that circulates the bath water. Since the oxygen-enriched air using the air in the bathroom is ejected into the bathtub 1 as large bubbles with a bubble diameter of about several millimeters, the oxygen concentration dissolved in the bath water is about 10 PPM at a hot water temperature of 40 ° C. The effect of oxygen could not be expected so much, and there was a problem that the oxygen concentration in the bathroom was not increased due to the concentration difference.

  The present invention solves the above-mentioned conventional problems. In addition to the bath water circulation device provided in the bathroom, an oxygen enrichment device is provided outside the bathroom, and after supplying high-concentration oxygen to the bath water circulation circuit, Oxygen enrichment in the entire bathroom of the oxygen enricher and bath water is supersaturated with high-concentration oxygen. It aims at providing the oxygen enriched bathtub apparatus which can implement | achieve a state simultaneously.

In order to solve the conventional problems, an oxygen-enriched bathtub apparatus according to the present invention includes a bathtub hot water circulation apparatus and a circulation circuit through which hot water in a bathtub circulates, an oxygen enrichment apparatus that supplies high-concentration oxygen, and the oxygen An oxygen pipe provided between the enrichment device and the circulation circuit, a vessel body having a hollow portion formed in a substantially rotational symmetry for blowing out high-concentration oxygen to the bathtub, and a tangential direction to the peripheral wall portion of the vessel body An inflow port that is open, a pressurized liquid introduction pipe connected to the inflow port, and a gas-liquid ejection hole that is open in the body, and a liquid in which a gas is pressurized and dissolved is introduced into the inflow port. By making a swirl flow in the vessel body and ejecting from the gas-liquid jet holes, decompression occurs and bubbles can be generated , and the gas-liquid jet holes are formed at one of both ends of the rotational symmetry axis of the hollow body portion. The gas-liquid ejection hole is opened and the inflow port of the vessel body is located more than the axial length center of the rotational symmetry axis But on the.

  As a result, oxygen having a high concentration is generated by an oxygen enrichment device provided outside the bathroom, and the generated high concentration oxygen passes through the oxygen pipe and is ejected from the gas-liquid ejection hole into the bathtub.

  The oxygen-enriched bathtub apparatus of the present invention can enjoy bathing in a bath space where a fine bubble bath of high-concentration oxygen air can be relaxed.

1st invention supplies the hot water of the bathtub hot water circulation apparatus and circulation circuit through which hot water of a bathtub circulates, and high concentration oxygen
An oxygen enrichment device, an oxygen pipe provided between the oxygen enrichment device and the circulation circuit, a container having a hollow portion formed substantially symmetrically to blow out high-concentration oxygen to the bath, and An inflow opening opened in a tangential direction on the peripheral wall of the vessel body, a pressurized liquid introduction pipe connected to the inflow port, and a gas-liquid ejection hole opened in the vessel body, and the gas was dissolved under pressure By introducing the liquid into the inlet and turning it into the swirl to be swirled from the gas / liquid jet hole, pressure can be reduced and bubbles can be generated, and the gas / liquid jet hole can rotate the hollow part of the container. The bathroom of the oxygen enricher is configured to open to one of both axial ends of the symmetry axis and to provide the inlet of the vessel on the gas-liquid ejection hole side with respect to the axial center of the rotational symmetry axis. It is possible to realize oxygen enrichment of the entire interior and supersaturated bath water at a high concentration of oxygen at the same time. .

In addition, since it is possible to generate a strong swirling flow in the body, the formation of a gas shaft by depressurization in the vicinity of the swirling center and the generation of fine bubbles as a core are promoted, and there is no fine flow path that causes dust adhesion Thus, a large amount of fine bubbles can be generated by vacuum separation.

In addition, the liquid introduced from the inflow port does not immediately go to the gas-liquid ejection hole, and the swirl flow can be grown and promoted toward the other end, so that the swirl flow is stabilized and the liquid near the swirl center is reduced. The formation of the gas axis at the center of rotation by the dissolved gas separation can be ensured, and a large amount of fine bubbles can be generated more reliably.

In the second invention, in particular, a plurality of inlets opened in a tangential direction to the peripheral wall portion of the container body of the first invention are provided at predetermined intervals on the circumference of the peripheral wall portion of the container body. , Because the swirl is promoted from a plurality of locations in the same rotation direction, a strong and stable swirl flow can be generated, and the formation of the swivel center gas axis by the decompression of the liquid in the vicinity of the swirl center and the dissolved gas separation is ensured, A large amount of fine bubbles can be generated more reliably.

In the third invention, in particular, by forming the container body of the first invention in a substantially hollow cylindrical shape, the inner hollow part of the cylindrical container body is a substantially planar circle whose both ends of the rotational symmetry axis are perpendicular to the axis. It becomes a columnar space, and liquid flows in tangentially from the circumference of this cylindrical space, so there is almost no flow velocity component in the swirl axis direction disturbing swirl flow, and only the flow velocity component of swirl perpendicular to the swirl axis is left. Therefore, a strong and stable swirling flow can be generated, and the formation of a gas axis at the swirling center is ensured by depressurizing the liquid in the vicinity of the swirling center and separating dissolved gas, and a large amount of fine bubbles can be generated more reliably. can do.

In particular, the fourth aspect of the invention includes a collision portion that has a predetermined distance from the gas-liquid jet hole of the container of the first invention and collides with the jet flow outside the container. The wake of the gas-liquid jet hole that generates fine bubbles due to sudden decompression generates a larger number of fine bubbles by vigorously colliding with the collision part. Can be achieved at the same time.

In particular, the fifth aspect of the present invention provides an impeller having a blade in the vicinity of the peripheral wall of the hollow portion of the first aspect of the invention, and having an impeller with the swirling axis of the swirling flow as a rotation axis. The flow of the introduced liquid causes the blades on the peripheral wall of the hollow portion to receive a force in the tangential direction so that the impeller rotates together with the swirling flow, and the swirling flow is prevented from being affected by the flow velocity component in the swirling axis direction. It is possible to secure the formation of the gas axis at the swivel center by depressurizing the liquid in the vicinity of the swivel center and separating the dissolved gas, and more reliably generate a large amount of fine bubbles.

In the sixth invention, in particular, the gas-liquid ejection hole of the first invention opens at one of both shaft ends of the swirling shaft of the swirling flow, and the vessel body is tapered so that the cross-sectional area decreases toward the gas-liquid ejection hole. By adopting the shape, the swirl radius of the swirling flow of liquid becomes smaller and the flow path becomes narrower as it approaches the gas-liquid jet hole, so that the flow velocity becomes faster and the flow resistance increases, the pressure increases, and the speed increases. The accompanying increase in the shearing force of the gas shaft and the increase in the pressure difference before and after the gas-liquid jet hole promote the generation of fine bubbles. In addition, in order to circulate the liquid against the increase in the flow resistance in the body, the liquid introduction pressure is increased, and the amount of dissolved gas increases because the pressure increases. As a result, the generation of dust and the generation of a large amount of fine bubbles can be realized .

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by the form of this Example.

(Embodiment 1)
1 is an overall system configuration diagram of an oxygen-enriched bathtub apparatus according to Embodiment 1 of the present invention, FIG. 2 is a perspective view of a fine bubble generating portion of the bubble generating device, and FIG. 3 is a cross-sectional view of the fine bubble generating portion. . In FIG. 1 to FIG. 3, the bathtub hot water circulation device 10 is provided below the apron 13 of the bathtub 12 in the bathroom 11 and circulates hot water in the bathtub 12 by a pump 15 provided in the circulation circuit 14. The oxygen enrichment device 17 provided in the ceiling upper part 16 of the bathroom 11 includes an oxygen enrichment film 18, a blower fan 19, a vacuum pump 20, a check valve 21, and an air switching valve 22, and air outside the bathroom. The oxygen-enriched air having a high concentration passes through the oxygen pipe 23 and enters the air suction port 24 and enters the circulation circuit 14. The bathtub 12 is formed with a suction port 25 and a discharge port 26 through which bath water circulates. A pump 15 is connected to the suction port 25 via the circulation circuit 14, and an air suction port 24 for sucking high-concentration oxygen is connected to the pump 15. A dissolution tank 27 is disposed on the downstream side of the pump 15, and the pump 15 and the dissolution tank 27 are communicated with each other by the circulation circuit 14. The discharge port 26 of the bathtub 12 is provided with a fine bubble generation unit 28, and the dissolution tank 27 and the fine bubble generation unit 28 are communicated by the circulation circuit 14.

  Next, in FIG. 2 and FIG. 3, the fine bubble generating portion 28 includes a vessel body 30 having a rotationally symmetric hollow portion 29 formed in a substantially elliptical sphere shape, and a rotationally symmetric axis provided on the peripheral wall of the vessel body 30. The inlet 31 is opened in a tangential direction with a circular cross section perpendicular to the pressure circuit, and the pressurized liquid introduction pipe 32 communicates with the circulation circuit 14. Opened gas-liquid ejection holes 33 are provided, and a circular baffle plate 34 which is a collision portion is disposed outside the two gas-liquid ejection holes 33. The baffle plate 34 is attached to each of the two gas-liquid ejection holes 33 with a predetermined interval by four support columns 35 extending from the vessel body 30.

  The operation / action of the oxygen-enriched bathtub hot water circulation apparatus configured as described above will be described below. By reducing the pressure by the vacuum pump 24, the air outside the bathroom 11 passes through the oxygen-enriched membrane 22, becomes highly concentrated oxygen (about 30%) air, passes through the oxygen pipe 30, and is stored in the dissolution tank 17. It is mixed into the circulation circuit 14 and ejected to the bathtub 12 together with the bathtub hot water circulated from the discharge port 16.

  When the pump 15 is operated, a suction force of the pump is generated, and the hot water in the bathtub 12 is sucked into the pump 15 from the suction port 25 and from the air suction port 24 through the circulation circuit 14. Then, oxygen air is pressurized and dissolved in hot water at a high-pressure section from the first through the circulation circuit 14 to the dissolution tank 27. Then, the oxygen air that could not be dissolved in the dissolution tank 27 is separated as excess air, and the hot water containing the dissolved air becomes mixed water, which is conveyed to the fine bubble generating unit 28 through the circulation circuit 14. The mixed water that has entered the hollow portion 29 of the vessel body 30 through the inlet 31 through the pressurized liquid introduction pipe 32 flows in from the tangential direction of the inner peripheral wall, and thus swirls along the peripheral wall of the hollow portion 29.

Due to the swirling motion of the water flow, a pressure difference is produced between the outer periphery and the center of the swirl, and the larger the swirl speed, the greater the pressure difference between the outer periphery and the center. Therefore, in the vicinity of the turning center, a part of the introduced mixed water is decompressed and the dissolved gas is separated, and at the rotationally symmetric axis portion of the vessel 30 serving as the turning center, this is caused by the difference in specific gravity between the gas and the liquid. The separated gas converges to form a thin string-like gas shaft 36.

  The mixed water in the hollow portion 29 has a tapered shape in which the cross-sectional area decreases as it approaches the two gas-liquid jet holes 33 while turning, so the turning radius becomes smaller and the flow path becomes narrower. In the vicinity of the hole 33, the turning speed and pressure become maximum, and the water on the outside side and the outlet of the gas-liquid jet hole 33 are pressed against each other. Oxygen air collected on the gas shaft 36 is compressed and sheared at the boundary surface or boundary region between the external water and the swirling mixed water, and is externally discharged from the two gas-liquid ejection holes 33 as a fluid containing fine bubbles. Erupted into the water. Since the jetted fluid is decompressed by the jetting resistance and can use the aforementioned fine bubbles as a nucleus, the dissolved gas can be separated and a large amount of fine bubbles can be generated. As described above, since the fine bubble generating portion is not made of a fine orifice shape or a net, it is possible to achieve both the reliable generation of fine bubbles and the prevention of stagnation of dust.

  Further, by introducing a pressurized liquid in the tangential direction of the peripheral wall portion of the hollow body portion 29, it becomes possible to generate a strong swirling flow in the hollow body, so that formation of a gas shaft by decompression near the swirling center, The generation of microbubbles serving as nuclei is promoted, and a large amount of microbubbles can be reliably generated by vacuum separation without a microchannel that causes dust adhesion.

  As a result, the bather can take a bath while sucking high-concentration oxygen obtained from the air outside the bathroom 11, and can exhibit a synergistic effect of relaxation by bathing, high-concentration oxygen inhalation, and quiet micro-bubble bathing. Furthermore, even in a bathing state in which the chest is slightly compressed by water pressure for whole body bathing, high concentration oxygen can be inhaled, so that it is difficult to fall short of oxygen. Moreover, the awakening effect by oxygen inhalation can be exhibited.

  In the present embodiment, the inlet 31 connected to the pressurized liquid introduction pipe 32 is provided in a tangential direction on the peripheral wall of the container body 30, but the velocity component is applied in the rotational symmetry axis direction of the container body 30. Even if the inlet 31 is tilted so as to have an opening, a gas axis is generated on the rotationally symmetric axis as long as the inflow velocity of the mixed water is sufficiently high. Is obtained.

  Then, the hollow portion 29 in the container body 30 is tapered toward the gas-liquid jet hole 33, so that the flow velocity is increased and the flow resistance is increased to increase the pressure. The generation of fine bubbles is promoted by the increase in the shearing force and the increase in the pressure difference before and after the gas-liquid ejection hole. Further, in order to circulate the liquid against the increase in the channel resistance in the vessel 30, the operating pressure of the pump 15 is increased to increase the liquid introduction pressure. This also increases the amount of generation of fine bubbles, which makes it possible to achieve both dust prevention and reliable generation of a large amount of fine bubbles.

  In addition, even after the liquid containing dissolved gas has generated fine bubbles due to sudden decompression immediately after exiting the gas-liquid jet holes, the jet flow further vigorously collides with the collision part downstream so that the fine bubbles and their nuclei As a result, more fine bubbles of high-concentration oxygen are generated. Therefore, it is possible to achieve both prevention of dust adhesion and generation of a large amount of fine bubbles.

(Embodiment 2)
FIG. 4 is a perspective view of the fine bubble generating part of the oxygen-enriched bathtub apparatus according to the second embodiment of the present invention, and FIG. 5 is a sectional view of the fine bubble generating part. In addition, the thing of the same structure as the oxygen enriched bathtub apparatus of 1st Embodiment gives the same code | symbol, and abbreviate | omits description. 4 to 5, the difference from the configuration of the first embodiment is that in a vessel body 38 having a hollow portion 37 formed in a shape in which a column is connected to a hemisphere, the hemispherical side of the rotational symmetry axis of the hollow portion 37. This is in that a gas-liquid ejection hole 39 in which a baffle plate 34 is disposed on the outside is provided at the end of the.

  The operation and action of the above configuration will be described. When the pump 15 is operated in the oxygen-enriched bathtub apparatus of the embodiment shown in the figure, the sucked high-concentration oxygen air is pressurized and dissolved in the bathtub water to become mixed water, and is conveyed to the fine bubble generating unit 28. The air-mixed water that has entered the hollow portion 37 of the container body 38 from the inlet 31 through the circulation channel 14 flows in from the tangential direction of the inner peripheral wall, and thus swirls along the peripheral wall of the hollow portion 37. The swirling motion of this water flow creates a pressure difference between the swirling outer periphery and the central portion, and the swirling outer periphery has a high pressure and the central portion has a low pressure. As a result, the dissolved gas is separated, and a gas shaft 36 is formed at the rotationally symmetric shaft portion of the vessel 37 serving as the center of rotation. Since the mixed water in the hollow portion 37 has a tapered shape in which the cross-sectional area decreases as it approaches the gas-liquid jet hole 39 while turning, the turning radius becomes smaller and the flow path becomes narrower. The swirling speed and pressure are maximized in the vicinity, and by increasing the shearing force of the gas shaft 36 and the increase of the pressure difference before and after the gas-liquid ejection hole 39 accompanying the increase in speed, fine bubbles with sheared gas shafts are generated, The generation of fine bubbles that cannot be completely dissolved and precipitate due to the difference is promoted.

  In this way, it is possible to promote generation of micro bubbles as a core and reliably generate a large amount of micro bubbles by decompression separation without a micro flow path causing dust adhesion. In addition, the liquid introduction pressure, that is, the pump operating pressure is increased in order to circulate the liquid against the increase in the flow path resistance in the body, and the dissolved liquid pressure increases, so the amount of dissolved gas also increases. This also increases the amount of fine bubbles generated, and it is possible to achieve both prevention of dust adhesion and reliable generation of a large amount of fine bubbles of high-concentration oxygen air.

  As a result, the bather can take a bath while sucking high-concentration oxygen obtained from the air outside the bathroom 11, and can exhibit the synergistic effect of relaxation by bathing, high-concentration oxygen inhalation, and quiet bubble bathing. Furthermore, even in a bathing state in which the chest is slightly compressed by water pressure for whole body bathing, high concentration oxygen can be inhaled, so that it is difficult to fall short of oxygen. Moreover, the awakening effect by oxygen inhalation can be exhibited.

(Embodiment 3)
FIG. 6 is a cross-sectional view of the fine bubble generating portion of the oxygen-enriched bathtub apparatus according to the third embodiment of the present invention. In addition, the thing of the same structure as the oxygen enriched bathtub apparatus of 1st Embodiment and 2nd Embodiment gives the same code | symbol, and abbreviate | omits description. In FIG. 6, the difference from the configurations of the first embodiment and the second embodiment is that the container body 41 is configured to have a hollow portion 40 formed in a truncated cone shape, and the rotation of the hollow portion 40 is performed. The gas-liquid jet hole 42 is provided on the small bottom circle side of the end portion of the symmetrical axis.

  By adopting the above configuration, the shape of the hollow portion 40 in the vessel body 41 is tapered toward the gas-liquid ejection hole 42, so that it is clear that the same effect as in the second embodiment is produced. It is.

(Embodiment 4)
FIG. 7 is a cross-sectional view of the fine bubble generating part of the oxygen-enriched bathtub apparatus according to the fourth embodiment of the present invention. In addition, the thing of the same structure as the oxygen enriched bathtub apparatus of 1st-3rd embodiment gives the same code | symbol, and abbreviate | omits description. In FIG. 7, the difference from the configuration of the first to third embodiments is that the vessel body 44 is configured in a bottomed and covered cylindrical shape so as to have a hollow portion 43 formed in a columnar shape, and a gas-liquid ejection hole 45 opens to one of both axial ends of the rotationally symmetric axis of the hollow portion 43, and the inlet 31 to the container body 44 is provided closer to the gas / liquid ejection hole 45 than the axial length center of the rotationally symmetric axis. A plurality of blades 46 in the radial direction are provided in the vicinity of the peripheral wall portion, and an impeller 47 having a rotating shaft as a rotating shaft of the swirling flow is provided in the hollow portion 43.

  The operation and action of the above configuration will be described. By operating the pump 15 in the bubble generating device of the embodiment shown in the figure, the mixed water in which air is pressurized and dissolved flows from the inlet 31 into the hollow portion 43 of the container body 44 from the tangential direction of the inner peripheral wall. . The flow swirls along the peripheral wall of the hollow portion 43, and the impeller 47 rotates with the swirl flow by pushing the blades 46 on the peripheral wall portion of the hollow portion 43 in the circumferential direction, thereby generating a stable swirl flow. The swirling motion of this water flow causes a pressure difference between the swirling outer periphery and the central portion, and the swirling outer periphery is at a high pressure and the center is at a low pressure. As a result, the dissolved gas is separated, and a gas shaft 36 is formed on the rotationally symmetric shaft portion of the vessel 44 serving as the center of rotation.

  At this time, the hollow portion 43 becomes a substantially planar cylindrical space with both ends of the rotationally symmetric axis perpendicular to the axis, and the liquid flows in a tangential direction from the circumferential portion of the cylindrical space, so that the swirling flow is disturbed. Since the flow velocity component in the axial direction is almost eliminated and only the flow velocity component of the swirl perpendicular to the swirl axis can be obtained, a strong and stable swirl flow can be generated, and the formation of the gas shaft 36 is facilitated. When the swirling flow in the container body 44 having the gas shaft 36 is ejected from the gas-liquid ejection hole 45, the gas shaft 36 is sheared into fine bubbles, and the ejected mixed water is decompressed by the ejection resistance, The dissolved gas is separated using the fine bubbles as nuclei, and a large amount of fine bubbles of high-concentration oxygen air can be generated.

  As described above, since the fine bubble generating portion 28 is not made of a fine orifice shape or a net, both reliable generation of fine bubbles and prevention of stagnation of dust can be achieved.

  Further, since the swirl flow is generated more stably without being disturbed by the flow velocity component in the swirl axis direction by the action of the impeller 47, formation of the swivel center gas axis by depressurization of liquid near the swirl center and separation of dissolved gas. And a large amount of fine bubbles can be generated more reliably.

  Furthermore, by arranging the inlet 31 close to the gas-liquid ejection hole 45 side and providing a sufficient distance from the inlet 31 to the other end of the body symmetry axis, the mixed water introduced from the inlet 31 can be reduced. The swirl flow can be grown and promoted toward the other end instead of going directly to the gas-liquid jet hole 45, so that the swirl flow is stable, and the swirling center of the swirl center by the decompression of the mixed water near the swirl center and separation of dissolved gas Formation of the gas shaft can be ensured, and a large amount of fine bubbles can be generated more reliably.

  In the present embodiment, a plurality of radial blades 46 are provided in the vicinity of the peripheral wall portion of the hollow portion 43 with respect to the inflow port 31 opened in the tangential direction to the peripheral wall of the container body 44, and swirling of the swirling flow The impeller 47 having the shaft as the rotation shaft is provided in the hollow portion 43. However, the impeller 47 may be any impeller that can turn by receiving the force of the water flow from the circulation flow path 14. For example, the peripheral wall of the hollow portion 43. Similar effects can be obtained by a configuration using a substantially radial twist blade in the vicinity of the portion or a combination of an inlet and a twist blade provided inclined from the tangential direction of the peripheral wall of the vessel body 44.

(Embodiment 5)
FIG. 8 is a perspective view of the fine bubble generating part of the oxygen-enriched bathtub apparatus in the fifth embodiment of the present invention. In addition, the thing of the same structure as the oxygen enriched bathtub apparatus of 1st-4th embodiment gives the same code | symbol, and abbreviate | omits description. In FIG. 8, the difference from the configuration of the first to fourth embodiments is that the container body 44 is formed in a bottomed and covered cylindrical shape so as to have a hollow portion 43 formed in a columnar shape, and the periphery of the container body 44. Two inflow ports 48 opened in a tangential direction are provided at positions facing each other across the rotational symmetry axis on the wall circumference, and mixed from the two inflow ports 49 through the two branched pressurized liquid introduction pipes 49. Gas water is sent to the hollow portion 43, and the gas / liquid ejection hole 45 opens to one of both axial ends of the rotational symmetry axis of the hollow portion 43, and the two inflow ports 49 are the gas / liquid ejection holes 45. The distance between the inflow port 49 and the gas-liquid jet hole 45 is shorter than half the axial length of the rotationally symmetric axis.

  The operation and action of the above configuration will be described. By operating the pump 15 in the bubble generating apparatus of the embodiment shown in the figure, the mixed water in which high-concentration oxygen air is pressurized and dissolved is supplied from the two inlets 49 to the hollow portion 43 of the container body 44. From the direction of the tangent of, and swivels along the peripheral wall of the hollow portion 43. Due to the swirling motion of the water flow, a pressure difference is generated between the swirling outer peripheral portion and the central portion, and the swirling outer peripheral portion has a high pressure and the central portion has a low pressure. As a result, the dissolved gas is separated, and a gas axis is formed at the rotationally symmetric shaft portion of the vessel 44 serving as the center of rotation.

  At this time, the hollow portion 43 becomes a substantially planar cylindrical space with both ends of the rotationally symmetric axis perpendicular to the axis, and the liquid flows in a tangential direction from the circumferential portion of the cylindrical space, so that the swirling flow is disturbed. Since the flow velocity component in the axial direction is almost eliminated and only the flow velocity component of the swirl perpendicular to the swirl axis can be obtained, a strong and stable swirl flow can be generated, and the formation of the gas shaft is facilitated.

  When the swirling flow in the container body 44 having the gas axis is ejected from the gas-liquid ejection hole 45, the gas axis is sheared to become fine bubbles, and the ejected mixed water is decompressed by the ejection resistance, and the fine bubbles are It is possible to separate dissolved gas by using as a nucleus and generate a large amount of fine bubbles. As described above, since the fine bubble generating portion 28 is not made of a fine orifice shape or a net, both reliable generation of fine bubbles and prevention of stagnation of dust can be achieved.

  In addition, since two inflow ports 49 are provided on the same circumference of the swirl flow and swirl is promoted from a plurality of locations in the same rotation direction, a strong and stable swirl flow can be generated, and the liquid near the swirl center can be generated. It is possible to secure the formation of a gas axis at the center of rotation by reducing the pressure and separating the dissolved gas, and more reliably generate a large amount of fine bubbles.

  In the present embodiment, the two inlets 49 are provided at opposite positions on the circumference of the peripheral wall of the vessel body 44. However, a predetermined interval may be used even if they do not face the same circumference of the peripheral wall of the hollow portion 43. A similar effect can be obtained even when two or more of the components are arranged.

  As described above, the oxygen-enriched bathtub apparatus according to the present invention can achieve both the generation of fine bubbles and the prevention of stagnation of dust by avoiding the use of a fine orifice shape or a net-like member in the fine bubble generation unit. Therefore, a microbubble bath, water purification equipment for polluted water such as lakes, aeration equipment for increasing dissolved oxygen concentration, aquaculture equipment such as aquatic organisms, drinking water and food reforming equipment, health and welfare equipment, It can also be applied to uses such as gas-liquid reactors.

Overall configuration diagram of oxygen-enriched bathtub apparatus in Embodiment 1 of the present invention The perspective view of the fine bubble generation | occurrence | production part of the oxygen enriched bathtub apparatus in Embodiment 1 of this invention Sectional drawing of the fine bubble generation | occurrence | production part of the oxygen enriched bathtub apparatus in Embodiment 1 of this invention The perspective view of the fine bubble generation | occurrence | production part of the oxygen enriched bathtub apparatus in Embodiment 2 of this invention Sectional drawing of the fine bubble generation | occurrence | production part of the oxygen enriched bathtub apparatus in Embodiment 2 of this invention Sectional drawing of the fine bubble generation | occurrence | production part of the oxygen enriched bathtub apparatus in Embodiment 3 of this invention. Sectional drawing of the fine bubble generation | occurrence | production part of the oxygen enriched bathtub apparatus in Embodiment 4 of this invention. The perspective view of the fine bubble generation | occurrence | production part of the oxygen enriched bathtub apparatus in Embodiment 5 of this invention Overall configuration diagram of a conventional oxygen-enriched bathtub apparatus

DESCRIPTION OF SYMBOLS 10 Bath hot water circulation device 12 Bath 14 Circulation circuit 17 Oxygen enrichment device 23 Oxygen piping 29, 37, 40, 43 Hollow part 30, 38, 41, 44 Body 31, 48 Inlet port 32, 49 Pressurized liquid introduction pipe 33 Gas-liquid ejection hole 34 Colliding part 36 Gas shaft 39, 42, 45 Gas-liquid ejection hole 46 Blade 47 Impeller

Claims (6)

Bathtub hot water circulation device and a circulation circuit for circulating hot water in the bathtub, an oxygen enrichment device for supplying high concentration oxygen, an oxygen pipe provided between the oxygen enrichment device and the circulation circuit, and high concentration oxygen A container having a hollow portion formed in a substantially rotationally symmetric manner, and an inlet opening tangentially to the peripheral wall of the container, and a pressurized liquid inlet pipe connected to the inlet A gas-liquid ejection hole opened in the vessel body, and a liquid in which a gas is pressurized and dissolved is introduced into the inflow port to be swirled in the vessel body and ejected from the gas-liquid ejection hole, thereby reducing the pressure. The gas-liquid jet hole opens at one of both ends of the rotationally symmetric axis of the hollow part of the vessel body, and the inlet of the vessel is located at the axial length center of the rotationally symmetric axis. An oxygen-enriched bathtub device provided on the gas-liquid jet hole side . The oxygen-enriched bathtub apparatus according to claim 1 , wherein a plurality of inflow ports opened in a tangential direction to the peripheral wall portion of the vessel body are provided at predetermined intervals on the circumference of the peripheral wall portion of the vessel body. The oxygen-enriched bathtub apparatus according to claim 1 or 2 , wherein the vessel body is formed in a substantially hollow cylindrical shape. The oxygen-enriched bathtub apparatus according to any one of claims 1 to 3 , further comprising a collision portion that has a predetermined interval from a gas-liquid ejection hole of the container body and that the ejection flow collides with the outside of the container body. The oxygen-enriched bathtub apparatus according to any one of claims 1 to 4 , further comprising: vanes in the vicinity of the peripheral wall portion of the hollow portion of the vessel body, and an impeller having a rotating shaft as a rotation axis of the swirling flow provided in the vessel body. . Liquid ejection holes is opened in one of the two axial ends of the pivot axis of the swirling flow, Utsuwatai the claim 1 which has a tapered shape to reduce the cross-sectional area toward the gas-liquid jet holes The oxygen-enriched bathtub device as described in 1.

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