JP5287573B2 - Fine foam group generating device and foam bathing device - Google Patents

Description

  The present invention relates to a fine foam group generating device and a foam bathing device.

  Conventionally, as a bubble bath apparatus, what was described, for example in patent document 1 is known. This bubble bathing device generates warm bubbles by supplying bubbles to a mixture of hot water and detergent manually charged into the tank, and the warm bubbles are generated from holes formed in the upper part of the tank. After being discharged, it gradually moves into the bathtub along the front wall of the tank.

  Moreover, as a fine foam group production | generation apparatus which can be applied to a foam bath apparatus, what was described, for example in patent document 2 is known. The impeller for gas-liquid mixing provided in the fine foam group generating device is provided with a stirring fin that is radially provided with a surface in the rotation direction of the rotation shaft, and is rotated with the rotation of the rotation shaft, and the rotation center of the stirring fin A gas vessel that opens at one end and stores the intake gas and opens the other end, and a regulator that is provided between the gas vessel and the stirring fin and that can adjust the amount of suction by the air supply tube. It generates bubbles containing a lot of.

JP 2004-321449 A JP 2006-88155 A

  By the way, in patent document 1, the production | generation of the foam which consists of a fine foam group is impossible. This is because, for example, bubbling (bubble supply) from a hole having an inner diameter of 0.5 mm or more contains a large amount of foam having a diameter of 10 mm or more. Alternatively, bubbling from a hole having an inner diameter of less than 0.5 mm is likely to cause clogging of the hole, and it becomes difficult to ensure maintainability. Here, the foam is a liquid in which a gas such as air is contained, and is formed by the surface tension of the liquid enclosing the gas.

On the other hand, since Patent Document 2 generates bubbles containing a lot of minute bubbles, the generation efficiency (energy efficiency / space efficiency) of a fine foam group is deteriorated. This is due to the following reason.
(1) In order to generate fine bubbles, it is necessary to provide a sufficient flow rate difference for splitting at the gas-liquid interface, but with a stirring fin, a wide range of fluid is rotated and sufficient for splitting. It is not possible to provide a flow rate difference, or excessive energy is required to obtain a sufficient flow rate difference.
(2) When the fluid is rotated with the stirring fin, the generated fine bubbles are combined by a centrifugal separation action for separating the gas and liquid.
(3) The ratio of large bubbles passing through the gap between the stirring chamber and the stirring fins is large. When fine foam groups are generated with this structure, the stirring fins are used in multiple stages to increase the probability of miniaturization of the large bubbles. It is necessary to devise such as doing so, and energy efficiency and space efficiency are remarkably deteriorated.

  The objective of this invention is providing the fine foam group production | generation apparatus and foam bathing apparatus which can perform the mixing of the gas and liquid which concern on bubble production | generation in more space-saving.

  In order to solve the above problems, the invention according to claim 1 is characterized in that a cylindrical tube portion, an annular inner flange provided on the tube portion, and the inner side concentrically with respect to the tube portion. A casing having a plurality of cylindrical fixed side peripheral walls projecting from a flange; a disk portion rotatably disposed in the casing around a center line of the cylinder portion; the cylinder portion and the cylinder Impellers having a plurality of cylindrical movable side peripheral walls that are arranged between the fixed side peripheral walls adjacent to each other and between the adjacent fixed side peripheral walls and projecting on the disk part concentrically with the cylindrical part. A plurality of rectifying plates that project from the cylindrical portion and the fixed peripheral wall at intervals in the circumferential direction so as to face the movable peripheral walls, and extend along the center line, and the casing, Formed between the impellers; And a mixing chamber folding alternately in the other direction, by mixing the gas and liquid introduced into the mixing chamber by the rotation of the impeller is summarized in that to generate the bubbles.

  According to this configuration, the gas and liquid introduced into the mixing chamber are sheared by a plurality of rectifying plates protruding in the circumferential direction with a circumferential flow accompanying the rotation of the impeller. Mixed in. That is, gas and liquid mixing (hereinafter also referred to as “gas-liquid mixing”) related to bubble generation is performed by the casing (cylinder part, inner flange, a plurality of fixed side peripheral walls) and the impeller (disc part, a plurality of movable parts). And the mixing chamber formed between the side walls is alternately folded in one side direction and the other side direction of the center line. Therefore, gas-liquid mixing for generating bubbles can be performed in a smaller space.

  The gist of the invention according to claim 2 is that, in the fine foam group generation device according to claim 1, the end face of the inner flange facing the impeller in the direction of the center line is formed flat. .

  According to this configuration, the unevenness of the gas-liquid distribution with respect to the flow direction caused by the influence of the current plate at the time of gas-liquid mixing is alleviated by forming the end face of the inner flange flat and not arranging the current plate or the like. The gas-liquid mixing on the downstream side of the current plate can be made more efficient.

  The invention according to claim 3 is the swirl flow path which is arranged on the upstream side of the mixing chamber and swirls the flow of the liquid introduced into the mixing chamber in the fine foam group generating device according to claim 1 or 2. And an air supply port that is arranged in an intermediate portion of the swirl flow path and supplies gas introduced into the mixing chamber.

  According to the configuration, prior to the introduction of the gas and the liquid into the mixing chamber, the liquid and the gas supplied from the air supply port are initially mixed in the swirling flow of the liquid in the swirling flow path. Therefore, gas-liquid mixing can be made more efficient as a whole.

  According to a fourth aspect of the present invention, in the fine foam group generating device according to the third aspect, the rotation direction of the impeller is set to be opposite to the flow direction in which the liquid swirls in the swirling flow path. The gist.

  According to this configuration, since a larger flow velocity difference, which is raised by the flow speed of the swirling liquid, is applied to the gas-liquid interface as a shearing force, gas-liquid mixing can be further promoted, and thus gas-liquid mixing can be performed. Furthermore, it can be performed in a space-saving manner.

  The invention according to claim 5 is the fine foam group generating device according to any one of claims 1 to 4, wherein the lid is disposed upstream of the mixing chamber and closes the open end of the cylindrical portion. And a cylindrical lid side peripheral wall projecting from the lid concentrically with respect to the cylindrical portion, and arranged in the casing so as to be rotatable around the center line on the upstream side of the mixing chamber. An upstream side having an upstream disk part and a cylindrical upstream peripheral wall disposed between the cylinder part and the lid side peripheral wall and projecting from the upstream disk part concentrically with the cylinder part An impeller, a plurality of liquid transporting portions that are disposed on the upstream peripheral wall in the circumferential direction so as to face the cylindrical portion and extend along the center line, and between the casing and the upstream impeller And is folded in one side direction and the other side direction of the center line into the mixing chamber. And a introduction path for introducing the body and a liquid, and be required to diffuse the gas and liquid of the introduction path by the rotation of the upstream impeller.

  According to this configuration, the gas and the liquid in the introduction path are diffused in such a manner that the liquid is transported by a plurality of liquid transport portions arranged at intervals in the circumferential direction as the upstream impeller rotates. Is done. That is, the diffusion of gas and liquid (hereinafter also referred to as “gas-liquid dispersion”) is performed between the casing provided with the lid body (lid body side circumferential wall) and the upstream impeller (upstream disk portion, upstream circumferential wall). This is performed by an introduction path that is formed in the direction of one side and the other side of the center line. Therefore, the deviation of the gas-liquid distribution with respect to the flow direction of the gas and liquid can be alleviated, and the energy at that time can be transmitted only to the gas and liquid existing in the region that requires rotation. The gas-liquid mixing in the mixing chamber can be made more efficient.

  The invention according to claim 6 is the fine foam group generation device according to any one of claims 1 to 5, wherein the plate member is disposed downstream of the mixing chamber, and is disposed downstream of the plate member. The gist of the present invention is to provide the discharge port, and the plate member discharges the air bubbles led out from the mixing chamber on the outer peripheral side of the impeller to the discharge port while blocking the flow in the circumferential direction.

  According to this configuration, the bubbles that are led out from the mixing chamber on the outer peripheral side of the impeller are blocked from flowing in the circumferential direction by the plate member, thereby suppressing swirling flow when discharged to the discharge port. can do. Therefore, gas-liquid separation of bubbles caused by the swirling flow can be suppressed, and the foam quality can be suitably maintained. Further, the pipe loss resistance due to the swirling flow can be reduced, and accordingly, the load on the compressor for introducing gas or the like into the mixing chamber can be reduced. Further, since the swirl flow can be suppressed in a small space where the plate member can be disposed, the load of the drive source for rotationally driving the impeller can be reduced accordingly.

  The invention according to claim 7 is a fine foam according to any one of claims 1 to 6 in which air as a gas and a surfactant-containing liquid as a liquid are mixed to produce foam composed of a fine foam group. The gist of the invention is that it is a foam bathing device provided with a group generation device.

  According to the same structure, the foam bath which was excellent in the texture can be performed with the foam which consists of a fine foam group.

  In this invention, the fine foam group production | generation apparatus and foam bathing apparatus which can perform the mixing of the gas and liquid which concern on bubble production | generation more space-saving can be provided.

Sectional drawing which shows the 1st Embodiment of this invention. Sectional drawing which shows the same embodiment. Sectional drawing which shows the same embodiment. The longitudinal cross-sectional view which shows the same embodiment. The water circuit figure which shows the same embodiment. The longitudinal cross-sectional view which shows the 2nd Embodiment of this invention. Sectional drawing which shows the same embodiment. The perspective view which shows the plate member of FIG.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 5 is a water circuit diagram showing a foam bathing apparatus to which the present embodiment is applied. As shown in the figure, the bath 10 provided in the foam bathing apparatus stores the foam W therein, and is provided with a foam inlet 11 for supplying the foam W into the bathtub 10. A foam outflow part 12 for draining the foam W inside is installed. The bubble inflow part 11 opens to the upper end of the bathtub 10, and the bubble outflow part 12 opens to the bottom of the bathtub 10. The bathtub 10 is provided with a plurality of nozzles 13 distributed in the upper half thereof.

  The foam bathing apparatus includes a first flow rate adjustment valve 22 connected to the water supply C via a water supply pipe 21a, and a second flow rate adjustment valve 23 connected to the water heater H via a hot water supply pipe 21b. Furthermore, a mixing (mixing plug) 24 connected to the first and second flow rate adjusting valves 22 and 23 via a water supply pipe 21c and a hot water supply pipe 21d, respectively. The mixing 24 mixes water and hot water whose flow rates are adjusted by the first and second flow rate adjustment valves 22 and 23 to generate hot water having a required water temperature (for example, 42 ° C.). The water supply pipe 21a and the hot water supply pipe 21b are provided with on-off valves 25 and 26, respectively, that are opened when in use (when bathing).

  The mixing 24 is connected to the third flow rate adjustment valve 27 via the pipe 21e, and the third flow rate adjustment valve 27 is connected to the stirring device 31 via the pipe 21f. The stirring device 31 is connected to a foaming agent tank 33 via an electric pump 32, and a surfactant-containing liquid (cleaning agent or the like) stored in the foaming agent tank 33 is driven by the electric pump 32. While being supplied, the third flow rate adjusting valve 27 agitates the warm water whose flow rate has been adjusted to generate so-called soapy water.

  The stirrer 31 is connected to the suction port 34a of the MBF (fine foam group) generator 34 via a pipe 21g. The MBF generator 34 has an inlet 34b connected to a fourth flow rate adjustment valve 36 via an air pipe 35a, and the fourth flow rate adjustment valve 36 is connected to a compressor 37 via an air pipe 35b. ing. The MBF generator 34 mixes the soapy water via the stirring device 31 whose flow rate is adjusted by the third flow rate adjustment valve 27 and the compressed air whose flow rate is adjusted by the fourth flow rate adjustment valve 36 to mix fine bubbles ( For example, a foam W having a diameter of 150 μm or less and a water content of 20 to 30% is generated, and the foam W is discharged from the discharge port 34c. This bubble W is a warm bubble warmed by the warm water generated in the mixing 24. The pipe 21g and the air pipe 35a are provided with an on-off valve 38 and an air valve 39, respectively, which are opened when in use (when bathing). The MBF generator 34 also includes a suction port 34d for sucking the circulating foam W.

  The discharge port 34c of the MBF generation device 34 is connected to the foam path switching valve 42 via the foam pipe 41a, and the foam path switching valve 42 is connected to the foam inflow part 11 via the foam pipe 41b. Alternatively, it is connected to the drain D via the bubble pipe 41c. Therefore, when the bubble path is switched so that the bubble pipes 41a and 41b communicate with each other by the bubble path switching valve 42, the bubbles W discharged from the MBF generation device 34 (discharge port 34c) pass through the bubble pipes 41a and 41b. Then, it is supplied from the bubble inflow part 11 into the bathtub 10. On the other hand, when the foam path is switched so that the foam pipes 41a and 41c communicate with each other by the foam path switching valve 42, the foam W discharged from the MBF generation device 34 (discharge port 34c) passes through the foam pipes 41a and 41c. And drained from the drain D.

On the other hand, the foam outflow portion 12 is connected to a duct 45 installed in the bathtub 10, and the duct 45 is connected to an inlet of the circulation pump 47 through a foam pipe 46 a.
The circulation pump 47 is composed of a positive displacement pump such as a vane pump, for example, and its discharge port is connected to a foam path switching valve 48 via a foam pipe 46b. The bubble path switching valve 48 is connected to the suction port 34d of the MBF generator 34 via a bubble pipe 46c, and is connected to the drain D via the bubble pipe 46d. Accordingly, when the foam path is switched so that the foam pipes 46b and 46c communicate with each other by the foam path switching valve 48, the foam W in the bathtub 10 sucked by the circulation pump 47 is sucked through the foam pipes 46b and 46c. It is supplied to the mouth 34d. And the MBF production | generation apparatus 34 produces | generates (regenerate | regenerates) the bubble W which consists of the fine foam group by suck | inhaling the bubble W in the bathtub 10 circulated by the circulation pump 47 from the suction inlet 34d. On the other hand, when the foam path is switched by the foam path switching valve 48 so that the foam pipes 46b and 46d communicate with each other, the foam W in the bathtub 10 sucked by the circulation pump 47 is drained through the foam pipes 46b and 46d. D is drained.

  In addition, when circulating the foam W in the bathtub 10 with the circulation pump 47, the MBF production | generation apparatus 34 does not add the soap water etc. from the stirring apparatus 31 fundamentally. However, when the temperature of the circulating bubble W is low, the opening of the third flow rate adjusting valve 27 is changed to warm the bubble W, and the warm water generated by the mixing 24 is added.

  Further, the water supply pipe 21 a is connected to the pipe 51 a between the water supply C and the on-off valve 25, and the hot water supply pipe 21 b is connected to the pipe 51 a between the water heater H and the on-off valve 26. The pipe 51 a is connected to each of the plurality of nozzles 13. The pipe 51a is provided with an on-off valve 52 that is opened when in use (when bathing). These nozzles 13 are supplied with hot water mixed with water from the water supply C and hot water from the water heater H when the on-off valve 52 is in an open state. ) Is added. This is to make it easier to circulate the bubbles W that are in a scaly state due to moisture loss. That is, the bubbles W tend to be difficult to transfer when the water content is less than 15%. The nozzle 13 adds mist water so that the water content of the foam W in the foam outflow part 12 is 15% or more.

  The water supply pipe 21a is provided with a temperature sensor 61 for detecting the water temperature Tc of the water supply C, and the hot water supply pipe 21b is provided with a temperature sensor 62 for detecting the hot water temperature Th of the water heater H. Further, a temperature sensor 63 for detecting the hot water temperature Tw generated by the mixing 24 is provided in the pipe 21e. The bubble pipe 41a is provided with a temperature sensor 64 for detecting a bubble temperature Tf, which is the temperature of the bubble W discharged from the MBF generation device 34 (discharge port 34c) in the vicinity of the bubble path switching valve 42. The bubble pipe 46c is provided with a temperature sensor 65 for detecting the temperature To of the bubble W sucked into the MBF generator 34 (suction port 34d) in the vicinity of the bubble path switching valve 48. These temperature sensors 61 to 65 are electrically connected to the control device 66. Based on the detection results of these temperature sensors 61-65, the controller 66 controls the first to fourth flow rate adjusting valves 22, 23, 27, 36, the MBF generator 34, the bubble path switching valves 42, 48, and the circulation pump 47. Etc. are driven and controlled.

  Next, the MBF generator 34 will be further described. FIG. 4 is a longitudinal sectional view showing the MBF generation device 34. 1, 2 and 3 are cross-sectional views taken along the lines AA, BB and CC in FIG. The vertical direction in these figures coincides with the vertical direction.

  As shown in FIG. 4, the MBF generator 34 includes an electric motor 71 whose rotation is controlled by the control device 66, and the electric motor whose axis (hereinafter also referred to as “center line O”) extends in the horizontal direction. A spacer 73 provided with a relay shaft 72 connected so as to rotate integrally with a rotating shaft 71a of 71, and further formed into a ring shape so as not to interfere with the rotation of the rotating shaft 71a and the like and fixed to a case 71b of the electric motor 71. Is provided.

  Further, the MBF generating device 34 includes a first casing 74 having a disc-shaped lid 74 a disposed on one side in the axial direction of the relay shaft 72 (opposite side of the electric motor 71). The first casing 74 has a main body portion 74b projecting in a substantially cylindrical shape from the lid body 74a so as to surround the outer peripheral surface of the relay shaft 72 on the inner peripheral side, and the axis of the main body portion 74b. The end face on the other side in the direction (on the electric motor 71 side) is fixed to the spacer 73 in such a manner that the end face comes into contact with the spacer 73.

  As shown in FIG. 2, the main body 74b is formed with a circular water supply port 74c drilled downward along the radial direction of the center line O from the top, and communicates with the lower end of the water supply port 74c. Then, an arcuate swirl passage 74d extending in the circumferential direction of the center line O toward the counterclockwise direction shown in the figure is formed, and further drilled obliquely upward along the radial direction of the center line O from the lower left. Thus, a circular air supply port 74e communicating with the intermediate portion of the swirl flow path 74d is formed. The water supply port 74c communicates with the suction port 34a at the upper end side and can supply soapy water, and the air supply port 74e disposed in the middle portion of the swirl flow path 74d has the suction port 34b at the lower end side. Compressed air can be supplied. Accordingly, the soap water supplied to the water supply port 74c is swirled in the swirling flow path 74d. And the soap water and the compressed air supplied to the air supply port 74e are initially mixed by the swirling flow of the soap water in the swirling flow path 74d.

  As shown in FIGS. 3 and 4, the first casing 74 has a first cylindrical portion 74f that protrudes in a cylindrical shape on one axial side from the lid body 74a, and against the first cylindrical portion 74f. A concentric circle has a lid-side peripheral wall 74g projecting in a cylindrical shape from the lid 74a on one side in the axial direction. The first cylindrical portion 74f, the lid body 74a, and the main body portion 74b form a continuous circumferential surface having the same outer diameter. The lid-side peripheral wall 74g forms an internal space S1 that communicates with the swirl flow path 74d. Note that the opening end of the first cylindrical portion 74f is expanded to form an annular mounting wall 74h.

  As shown in FIGS. 1 and 4, the second casing 75 disposed on one axial direction side of the first casing 74 is a cylindrical second tube portion having an inner diameter equivalent to the inner diameter of the first tube portion 74 f. 75a. The distal end of the second cylindrical portion 75a on the other side in the axial direction is liquid-tightly attached to the inner peripheral surface of the mounting wall 74h, and an outer flange 75b that abuts the distal end surface of the mounting wall 74h, for example, a bolt Is fastened to the mounting wall 74h.

  Further, the second casing 75 has an annular inner flange 75c provided at the center in the axial direction of the second cylindrical portion 75a, and with respect to the second cylindrical portion 75a on the other side in the axial direction from the inner flange 75c. A plurality of (for example, two) cylindrical first fixed-side peripheral walls 75e and 75f projecting on a concentric circle, and further concentrically with respect to the second cylindrical portion 75a on one side in the axial direction from the inner flange 75c. A plurality of (for example, two) cylindrical second fixed-side peripheral walls 75g and 75h projecting from the top.

  The first and second fixed-side peripheral walls 75e and 75g have the same outer diameter and inner diameter so as to have a continuous cylindrical shape with the inner flange 75c interposed therebetween. The first and second fixed side peripheral walls 75f and 75h form a continuous circular inner peripheral surface having an inner diameter equivalent to the inner diameter of the inner flange 75c. A plurality of (for example, three) spoke portions 75i extending in the radial direction toward the center line O at positions in the axial direction of the inner flange 75c are formed on the inner peripheral surface. These spoke portions 75i are arranged at equiangular (120 degree) intervals (see FIG. 1), and the front ends of the respective center lines O are connected to an annular support wall 75j that opens along the center line O. ing. The first fixed-side peripheral wall 75f forms an internal space S2 that communicates with the internal space S1, and the second fixed-side peripheral wall 75h communicates with the internal space S2 via an opening between adjacent spoke portions 75i. An internal space S3 is formed. The opening end on the one axial side of the second cylindrical portion 75a is expanded to form an annular mounting wall 75k having an outer flange.

  Here, the second casing 75 of the present embodiment includes an inner peripheral surface of the second cylindrical portion 75a, outer peripheral surfaces and inner peripheral surfaces of the first and second fixed side peripheral walls 75e and 75g, and the first and second fixed sides. A plurality of rectifying plates 76 projecting radially from the outer peripheral surfaces of the peripheral walls 75f and 75h are provided. Each rectifying plate 76 extends in parallel with the center line O over the entire length of the second cylindrical portion 75a, the first fixed side peripheral walls 75e and 75f, and the second fixed side peripheral walls 75g and 75h. As shown in FIG. 1, these rectifying plates 76 are arranged at equiangular intervals on the second cylindrical portion 75a, the first fixed side peripheral walls 75e and 75f, and the second fixed side peripheral walls 75g and 75h. The inner flange 75c is formed between the second cylinder part 75a and the first fixed side peripheral wall 75e, between the first fixed side peripheral walls 75e and 75f, between the second cylinder part 75a and the second fixed side peripheral wall 75g, and between the second A substantially circular flat surface 77 is formed between the fixed side peripheral walls 75g and 75h.

  As shown in FIG. 4, the third casing 78 disposed on the one axial side of the second casing 75 has a cylindrical third cylindrical portion 78a having an inner diameter equivalent to the inner diameter of the second cylindrical portion 75a. . The distal end portion of the third cylindrical portion 78a on the other side in the axial direction is liquid-tightly attached to the inner peripheral surface of the mounting wall 75k, and the outer flange 78b is in contact with the distal end surface of the mounting wall 75k (outer flange). In FIG. 2, the bolt is fastened to the mounting wall 75k by, for example, a bolt. The third casing 78 constitutes a casing together with the first and second casings 74 and 75, and the third cylinder part 78a constitutes a cylinder part together with the first and second cylinder parts 74f and 75a.

  The third casing 78 has an annular inner flange 78c provided on one side in the axial direction of the third cylindrical portion 78a, and is concentrically with respect to the third cylindrical portion 78a on the other side in the axial direction from the inner flange 78c. A plurality of (for example, two) cylindrical third fixed-side peripheral walls 78e and 78f projecting from each other. The inner peripheral portion of the inner flange 78c extends to the inner peripheral side with respect to the third fixed side peripheral wall 78f and is bent so that its tip protrudes in a boss shape on one side in the axial direction. An outlet 34c is formed. The third fixed side peripheral walls 78e and 78f have the same outer diameter and inner diameter as the second fixed side peripheral walls 75g and 75h (and the first fixed side peripheral walls 75e and 75f), respectively. The third fixed side peripheral wall 78f forms an internal space S4 that communicates with the internal space S3 and the discharge port 34c.

  Here, the third casing 78 of the present embodiment includes a plurality of rectifying plates that project radially from the inner peripheral surface of the third cylindrical portion 78a and the outer peripheral surfaces and inner peripheral surfaces of the third fixed side peripheral walls 78e and 78f. 79. Each rectifying plate 79 extends in parallel with the center line O over the entire length of the third cylindrical portion 78a and the third fixed side peripheral walls 78e, 78f. The rectifying plates 79 are disposed at equiangular intervals on the third cylindrical portion 78a and the third fixed side peripheral walls 78e and 78f. The inner flange 78c forms a substantially circular flat surface 80 between the third cylindrical portion 78a and the third fixed side peripheral wall 78e, and between the third fixed side peripheral walls 78e and 78f.

  In the first to third casings 74, 75, and 78 (casing), a stepped columnar rotating shaft 81 that extends along the center line O is disposed. The rotation shaft 81 is rotatably supported by the support wall 75j around the center line O in the longitudinal intermediate portion passing through the support wall 75j, and the other end portion in the axial direction passing through the lid 74a. In FIG. 4, the lid 74a is rotatably supported around the center line O. And the front-end | tip part which protrudes from the cover body 74a of the rotating shaft 81 is connected so that the said relay shaft 72 may rotate integrally.

  The first impeller 82 is connected to the rotary shaft 81 so as to rotate integrally at a position in the axial direction that forms the boundary between the first and second casings 74 and 75. The first impeller 82 includes a first disc portion 82a that is coupled to the rotary shaft 81 so as to rotate integrally therewith, and the first disc portion 82a is located on the other side in the axial direction with respect to the first cylindrical portion 74f. It has a cylindrical upstream peripheral wall 82b projecting concentrically. The upstream peripheral wall 82b is disposed between the first cylindrical portion 74f and the lid side peripheral wall 74g. That is, the first casing 74 and the first impeller 82 are arranged in a so-called labyrinth shape. The upstream peripheral wall 82b includes a plurality of groove portions 83 serving as a plurality of liquid transport portions that are recessed in the outer peripheral surface facing the first cylindrical portion 74f. Each groove 83 extends in parallel with the center line O over substantially the entire length of the upstream peripheral wall 82b. As shown in FIG. 3, these groove portions 83 are arranged at equal angular intervals on the upstream peripheral wall 82b. The upstream peripheral wall 82b has a plurality of wing shapes that project relatively by forming irregularities with the grooves 83. The first disc portion 82a is formed with a taper 82c for promoting the movement of compressed air and soapy water (hereinafter also referred to as “gas-liquid”) introduced into the internal space S1 to the outer peripheral side. Yes.

  On the other hand, the first impeller 82 includes cylindrical first movable side peripheral walls 82d and 82e that are provided concentrically with respect to the second cylindrical portion 75a on the one axial side from the first disc portion 82a. The first movable side peripheral wall 82d is disposed between the second cylindrical portion 75a and the first fixed side peripheral wall 75e, and the first movable side peripheral wall 82e is disposed between the first fixed side peripheral walls 75e and 75f. That is, the second casing 75 and the first impeller 82 are arranged in a so-called labyrinth shape.

  Here, a circumferential groove G1 is formed at the boundary between the first and second cylindrical portions 74f and 75a. The circumferential groove G1 is recessed from the inner circumferential surface of the first cylindrical portion 74f to the radially outer side facing the first disc portion 82a. . And between the 1st casing 74 (1st cylinder part 74f, the cover body surrounding wall 74g, etc.) and the 1st impeller 82 (upstream surrounding wall 82b etc.), it folds in the other side direction and one side direction of the centerline O. An introduction path L that is displaced radially outward of the center line O and communicates with the circumferential groove G1 is formed, and the second casing 75 (second cylindrical portion 75a, inner flange 75c, first fixed-side circumferential walls 75e, 75f is formed. ) And the first impeller 82 (the first disc portion 82a, the first movable side peripheral walls 82d, 82e) communicate with the circumferential groove G1 and are alternately folded back in the one side direction and the other side direction of the center line O. On the other hand, a first mixing chamber C1 that is displaced radially inward of the center line O and communicates with the internal space S2 is formed. That is, the first impeller 82 has a configuration in which an impeller related to gas-liquid mixing and an upstream impeller related to gas-liquid dispersion are integrally formed, and the first disc portion 82a includes the disc portion and the upstream side of the impeller. The upstream disk part of the impeller is overlapped.

  In such a configuration, when the first impeller 82 rotates, the soapy liquid that tends to stay in the lower side in the introduction path L of the gas-liquid introduced into the internal space S1 is conveyed upward in the groove 83. And is introduced into the first mixing chamber C1 through the circumferential groove G1. That is, the upstream peripheral wall 82b does not have a structure such as a rectifying plate that obstructs a swirling flow of soap water or the like. The gas and liquid introduced into the first mixing chamber C <b> 1 are mixed in such a manner that the circumferential flow accompanying the rotation of the first impeller 82 is sheared by the plurality of rectifying plates 76.

  In the present embodiment, the rotation direction of the first impeller 82 is set in a direction opposite to the direction of the swirling flow of soap water in the swirling flow path 74d, and is equal to the swirling flow speed of the soap water. A larger flow velocity difference that is raised is applied to the gas-liquid interface as a shearing force. Therefore, in the introduction path L, gas-liquid mixing is promoted together.

  A second impeller 84 is coupled to one end portion in the axial direction of the rotation shaft 81 so as to rotate integrally. The second impeller 84 includes a second disc portion 84a that is coupled to the rotary shaft 81 so as to rotate integrally with the second impeller 84, and to the second cylindrical portion 75a on the other axial side from the second disc portion 84a. Cylindrical second movable side peripheral walls 84b and 84c projecting concentrically. The second movable side peripheral wall 84b is disposed between the second cylindrical portion 75a and the second fixed side peripheral wall 75g, and the second movable side peripheral wall 84c is disposed between the second fixed side peripheral walls 75g and 75h. That is, the second casing 75 and the second impeller 84 are arranged in a so-called labyrinth shape.

  On the other hand, the second impeller 84 has cylindrical third movable side peripheral walls 84d and 84e that project from the second disc portion 84a on one side in the axial direction, concentrically with respect to the third cylindrical portion 78a. The third movable side peripheral wall 84d is disposed between the third cylindrical portion 78a and the third fixed side peripheral wall 78e, and the third movable side peripheral wall 84e is disposed between the third fixed side peripheral walls 78e and 78f. That is, the third casing 78 and the second impeller 84 are arranged in a so-called labyrinth shape. The second and third movable side peripheral walls 84b and 84d have the same outer diameter and inner diameter so as to have a continuous cylindrical shape with the second disc portion 84a interposed therebetween. The second and third movable side peripheral walls 84c and 84e also have the same outer diameter and inner diameter so as to have a continuous cylindrical shape with the second disc portion 84a interposed therebetween.

  Here, a circumferential groove G2 is formed at the boundary between the second and third cylindrical portions 75a and 78a. The circumferential groove G2 is recessed from the inner peripheral surface of the second cylindrical portion 75a to the radially outer side facing the second disc portion 84a. . And between the 2nd casing 75 (2nd cylinder part 75a, inner side flange 75c, 2nd fixed side surrounding wall 75g, 75h) and 2nd impeller 84 (2nd disc part 84a, 2nd movable side surrounding wall 84b, 84c). Is formed with a second mixing chamber C2 that communicates with the internal space S3 and is displaced radially outward of the center line O while being folded back in one direction and the other direction of the center line O and communicating with the circumferential groove G2. Of the third casing 78 (the third cylindrical portion 78a, the inner flange 78c, the third fixed-side peripheral walls 78e, 78f) and the second impeller 84 (the second disc portion 84a, the third movable-side peripheral walls 84d, 84e). In the meantime, it communicates with the circumferential groove G2 and is displaced inward in the radial direction of the center line O while alternately turning back to the one side direction and the other side direction of the center line O to communicate with the internal space S4 (discharge port 34c). The third mixing chamber C3 is formed It has been.

  In such a configuration, when the second impeller 84 rotates, the gas-liquid introduced into the second mixing chamber C2 through the internal spaces S2 and S3 has a circumferential flow accompanying the rotation of the second impeller 84. The plurality of current plates 76 are mixed in a sheared manner. Subsequently, the gas-liquid introduced into the third mixing chamber C3 via the circumferential groove G2 is further mixed in such a manner that the circumferential flow accompanying the rotation of the second impeller 84 is sheared by the plurality of rectifying plates 79. Is done. And the gas-liquid mixed in this way is discharged from the discharge outlet 34c as the bubble W which consists of a fine foam group.

Next, the operation of the present embodiment will be generally described.
First, the soap water supplied to the water supply port 74c through the suction port 34a is swirled in the swirl flow path 74d. Then, the soap water and the compressed air supplied to the air supply port 74e are initially mixed by the swirling flow of the soap water in the swirling flow path 74d, and introduced into the introduction path L through the internal space S1. The gas-liquid (soap water and compressed air) introduced into the introduction path L is diffused by the rotation of the first impeller 82 so that the soap water that tends to stay on the lower side is conveyed upward in the groove 83. And introduced into the first mixing chamber C1 through the circumferential groove G1. At this time, the first impeller 82 rotates in the direction opposite to the direction of the swirling flow of the soap water or the like in the swirling flow path 74d, so that a larger flow velocity difference is given to the gas-liquid interface as a shearing force. Promotion is planned.

  Next, the gas and liquid introduced into the first mixing chamber C1 are mixed and introduced into the internal space S2 in such a manner that the circumferential flow accompanying the rotation of the first impeller 82 is sheared by the plurality of rectifying plates 76. At this time, the inner flange 75c forms a flat surface 77 having no irregularities such as a current plate, so that the deviation of the gas-liquid distribution with respect to the flow direction caused by the influence of the current plate 76 during gas-liquid mixing is reduced.

  The gas and liquid introduced into the internal space S3 from the internal space S2 are introduced into the second mixing chamber C2 and are similarly mixed by the rotation of the second impeller 84. The mixed gas / liquid is introduced into the third mixing chamber C3 via the circumferential groove G2 and further mixed. At this time, the inner flange 78c forms a flat surface 80 having no irregularities such as a current plate, so that the deviation of the gas-liquid distribution with respect to the flow direction caused by the influence of the current plate 79 during gas-liquid mixing is reduced.

  The gas and liquid mixed in the above-described manner are discharged from the discharge port 34c as bubbles W made of a fine foam group. As described above, the bubbles W are supplied into the bathtub 10 through the bubble pipes 41a and 41b.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In this embodiment, the gas-liquid (compressed air and soapy water) introduced into the first to third mixing chambers C1 to C3 is in the circumferential direction accompanying the rotation of the first and second impellers 82 and 84. The flow is mixed in such a manner that it is sheared by a plurality of rectifying plates 76 and 79 protruding in the circumferential direction at intervals. That is, gas-liquid mixing related to bubble generation is performed in the first mixing chamber C1 formed between the second casing 75 and the first impeller 82, and the second mixing chamber C2 formed between the second casing 75 and the second impeller 84. The third mixing chamber C <b> 3 formed between the third casing 78 and the second impeller 84 is intensively performed. Therefore, gas-liquid mixing for generating bubbles can be performed in a smaller space.

  (2) In the present embodiment, the end surfaces (flat surfaces 77, 80) of the inner flanges 75c, 78c are formed flat and no rectifying plate or the like is disposed, thereby being influenced by the rectifying plates 76, 79 during gas-liquid mixing. The generated deviation of the gas-liquid distribution with respect to the flow direction is alleviated, and the gas-liquid mixing on the downstream side of the flow regulating plates 76 and 79 can be made more efficient.

  (3) In the present embodiment, prior to the introduction of gas and liquid into the mixing chamber (first mixing chamber C1), the soap water is supplied from the soap water and the air supply port 74e in a swirling flow in the swirling flow path 74d. By performing initial mixing with the compressed air, the gas-liquid mixing can be made more efficient as a whole.

  (4) In the present embodiment, the rotation direction of the impeller (first impeller 82) is set to be opposite to the direction in which the soap water swirls in the swirl flow path 74d. Therefore, in the first mixing chamber C1, a larger flow velocity difference raised by the swirling flow velocity of the soap water is given to the gas-liquid interface as a shearing force, so that gas-liquid mixing can be further promoted, and consequently Gas-liquid mixing can be performed in a further space-saving manner.

  (5) In the present embodiment, the gas-liquid in the introduction path L is conveyed in the form of soap water in a plurality of grooves 83 arranged at intervals in the circumferential direction as the first impeller 82 rotates. Diffused. That is, gas-liquid dispersion is performed in the introduction path L formed between the first casing 74 having the lid 74a (lid body peripheral wall 74g) and the first impeller 82 (first disc portion 82a, upstream peripheral wall 82b). Done. Therefore, the deviation of the gas-liquid distribution with respect to the gas-liquid flow direction can be mitigated, and the energy at that time can be transmitted only to the gas-liquid existing in the region that requires rotation, so that it is on the downstream side. Gas-liquid mixing in the first mixing chamber C1 or the like can be made more efficient.

(6) In the present embodiment, the foam bath having excellent texture can be performed by the foam W composed of the fine foam group generated by the MBF generator 34.
(7) In the present embodiment, the first impeller 82 is provided with the function of gas-liquid mixing and the function of gas-liquid dispersion. For example, these functions are separately provided to two impellers (impeller, upstream impeller). The number of parts can be reduced as compared with the case where it is provided.

  (8) In this embodiment, by repeating gas-liquid mixing (and gas-liquid dispersion in the flat surfaces 77 and 80) by a plurality of mixing chambers (first to third mixing chambers C1 to C3), finer detail is achieved. A fine foam group (bubble W) can be generated.

  (9) In the present embodiment, the functions such as gas-liquid mixing and gas-liquid dispersion are collectively incorporated in the MBF generator 34, so that one-pass continuous generation of fine foam groups is possible with high efficiency and space saving. .

  (10) In this embodiment, the MBF generator 34 connected to the discharge port of the circulation pump 47 generates or regenerates the foam W that has disappeared or deteriorated along with the circulation, so that a foam bath with excellent texture can be obtained. Can continue. That is, by heating and generating (regenerating) the circulated foam W, it is possible to continue bathing with the warm foam W composed of a fine foam group. Moreover, since the foam W which consists of a fine foam group has much moisture content and a large heat capacity, the temperature fall of the foam W during the accumulation or bathing can also be suppressed.

  (11) In the present embodiment, even if the circulated bubble W is lost and becomes in a scaly state, it is possible to regenerate the high-quality bubble W only by adding some moisture (warm water) in the MBF generator 34. Therefore, for example, bubbles W can be generated (regenerated) more efficiently than when bubbles W are generated from scratch. That is, when the bubble W is generated from scratch, the amount of water occupied in the entire bubble W needs to be, for example, 0% to 25%. On the other hand, when the bubble W is regenerated by circulation, the amount of water occupied in the entire bubble W For example, it may be only 15% to 25%.

  Further, since the circulated bubble W has a certain amount of heat, for example, the bubble W can be efficiently heated and generated (regenerated) as compared with the case where the bubble W is generated from scratch. That is, when the bubble W is generated from scratch, it is necessary to warm the bubble W from, for example, 23 ° C to 43 ° C, whereas when the bubble W is regenerated by circulation, the bubble W is changed from, for example, 38 ° C to 43 ° C. Just warm to C. By the above, the energy consumption in foam bathing can be reduced as a whole.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In the second embodiment, a plate member is arranged on the downstream side of the mixing chamber of the MBF generating device, and bubbles (bubbles W) led out from the mixing chamber are blocked from flowing in the circumferential direction to the discharge port 34c. Since the configuration is different from that of the first embodiment, detailed description of the same parts is omitted.

6 is a longitudinal sectional view showing the MBF generation apparatus 90 of the present embodiment, and FIG. 7 is a sectional view taken along the line DD of FIG.
As shown in FIG. 6, the MBF generation device 90 includes an electric motor 91 whose rotation is controlled by the control device 66, and rotates integrally with a rotation shaft (not shown) of the electric motor 91 whose axis extends in the horizontal direction. And a first casing 93 as a casing fixed to the case 91a of the electric motor 91. The first casing 93 has an annular lid 93a as an inner flange that forms an internal space S11 on the inner circumferential side so as not to interfere with the rotation of the rotary shaft 92 and the like, and the center from the bottom of the lid 93a. It has a circular water supply port 93b that is drilled upward along the radial direction of the line O and communicates with the internal space S11, and is further drilled downward along the radial direction of the center line O from the upper part of the lid 93a. And a circular air supply port 93c communicating with the internal space S11. The water supply port 93b communicates with the suction port 34a (see FIG. 5) at the lower end side to supply soapy water, and the air supply port 93c is connected to the suction port 34b (see FIG. 5) at the upper end side. Compressed air can be supplied in communication. Accordingly, the soap water supplied to the water supply port 93b and the compressed air supplied to the air supply port 93c are initially mixed in the internal space S11.

  The first casing 93 includes a first cylindrical portion 93d as a cylindrical portion that protrudes in a cylindrical shape from the outer peripheral end of the lid 93a to the one axial side, and the first casing 93 extends from the lid 93a to the one axial side. A plurality (for example, two) of cylindrical fixed side peripheral walls 93e and 93f are provided so as to protrude concentrically with respect to one cylindrical portion 93d. The fixed peripheral wall 93f forms an internal space S12 that communicates with the internal space S11. The opening end of the first cylinder portion 93d is expanded to form an annular mounting wall 93g.

  Here, the first casing 93 of the present embodiment is radially provided on the inner peripheral surface of the first cylindrical portion 93d, the outer peripheral surface and inner peripheral surface of the fixed side peripheral wall 93e, and the outer peripheral surface of the fixed side peripheral wall 93f. A plurality of rectifying plates 94 are provided. Each rectifying plate 94 extends in parallel with the center line O over the entire length of the first cylinder portion 93d and the fixed peripheral walls 93e and 93f. As shown in FIG. 7, these rectifying plates 94 are arranged at equiangular intervals on the first cylindrical portion 93d and the fixed peripheral walls 93e, 93f. As shown in FIG. 6, the lid 93a forms a substantially circular flat surface 95 between the first cylindrical portion 93d and the fixed peripheral wall 93e, and between the fixed peripheral walls 93e and 93f.

  The 2nd casing 96 arrange | positioned at the axial direction one side of the 1st casing 93 has the stepped cylindrical 2nd cylinder part 96a expanded in the said direction. The second cylindrical portion 96a is fixed to the mounting wall 93g with its tip end on the other side in the axial direction being liquid-tightly attached to the inner peripheral surface of the mounting wall 93g. The second casing 96 has an annular lid wall 96b provided on one side in the axial direction of the second cylindrical portion 96a. In addition, the front-end | tip part of the inner peripheral side of the cover wall 96b is curved so that it may protrude in the axial direction one side at the boss | hub shape, and forms the said discharge port 34c. The second cylinder portion 96a forms an internal space S13 that communicates with the internal space S12 and the discharge port 34c.

  The impeller 100 is connected to the tip end portion of the rotating shaft 92 disposed in the first casing 93 so as to rotate integrally. The impeller 100 has a bottomed cylindrical mounting portion 100a with which a tip portion on one side in the axial direction of the rotating shaft 92 is fitted, and also has a ring shape extending radially outward from the opening end of the mounting portion 100a. It has a flange portion 100b, and further has a cylindrical support wall 100c connected to the outer peripheral end of the flange portion 100b and arranged concentrically with the mounting portion 100a. One end of the support wall 100c in the axial direction extends to the vicinity of the mounting wall 93g in that direction, and is continuous with the ring-shaped disk portion 100d extending outward in the radial direction. The disc portion 100d is opposed to one end in the axial direction of the fixed peripheral walls 93e and 93f.

  The impeller 100 has a plurality of (for example, two) movable side peripheral walls 100e and 100f that are concentrically provided with respect to the support wall 100c (first cylinder portion 93d) on the other side in the axial direction from the disc portion 100d. . The movable side peripheral wall 100e is disposed between the first cylindrical portion 93d and the fixed side peripheral wall 93e, and the movable side peripheral wall 100f is disposed between the movable side peripheral walls 100e and 100f. That is, the first casing 93 and the impeller 100 are arranged in a so-called labyrinth shape. The impeller 100 forms a space S14 having a substantially W-shaped section around the center line O and defined by the mounting portion 100a, the flange portion 100b, and the support wall 100c. In addition, the first casing 93 (the lid 93a, the first cylinder portion 93d, the fixed side peripheral walls 93e, 93f) and the impeller 100 (the disc portion 100d, the movable side peripheral walls 100e, 100f) communicate with the internal space S12. In addition, the mixing chamber C11 that is displaced radially outward of the center line O while being folded back in one direction and the other direction of the center line O and communicated with the opening end of the first cylindrical portion 93d on the outer peripheral side of the impeller 100 is provided. Is formed.

  A plate member 101 formed in the shape of a claw gear is disposed at the opening end portion of the first casing 93 in such a manner that it is sandwiched between the step of the mounting wall 93g and the other end surface in the axial direction of the second cylindrical portion 96a. . The plate member 101 has a lid portion 101a having a substantially W-shaped cross section around the center line O so as to conform to the space S14, and is continuous with one axial end on the outer peripheral side of the lid portion 101a. It has a ring-shaped flange portion 101b extending outward in the radial direction. The flange portion 101b has an outer diameter smaller than the outer diameter of the disc portion 100d and is spaced apart from the disc portion 100d on one side in the axial direction. As shown in FIG. 8, the plate member 101 has a plurality of (six) arcuate mounting pieces 101c extending at equal angular intervals radially outward from the flange portion 101b. A plurality of (six) protrusions 101d are provided to protrude in the axial direction at the circumferential center near the outer periphery. The outer diameter of the mounting piece 101c is set to be equal to the inner diameter of the mounting wall 93g. The plate member 101 is firmly held by the protrusions 101d being crushed at the outer peripheral edge of each mounting piece 101c when being sandwiched between the step of the mounting wall 93g and the other end surface in the axial direction of the second cylindrical portion 96a. Is done.

  The plate member 101 attached to the mounting wall 93g forms a plurality (six) arcuate discharge channels 102 between the adjacent mounting pieces 101c. As shown in FIG. 6, each discharge channel 102 communicates with the mixing chamber C <b> 11 on the outer peripheral side of the impeller 100 and also communicates with the internal space S <b> 13 (discharge port 34 c).

  In such a configuration, when the impeller 100 rotates, the gas / liquid initially mixed in the internal space S11 is introduced into the mixing chamber C11 through the internal space S12. The gas and liquid introduced into the mixing chamber C <b> 11 are mixed in such a manner that the circumferential flow accompanying the rotation of the impeller 100 is sheared by the plurality of rectifying plates 94. At this time, the lid 93a forms a flat surface 95 without unevenness such as a rectifying plate, so that the deviation of the gas-liquid distribution with respect to the flow direction caused by the influence of the rectifying plate 94 at the time of gas-liquid mixing is alleviated. And the gas-liquid mixed in the mixing chamber C11 is discharged | emitted by the internal space S13 (discharge port 34c) through each discharge flow path 102 as the bubble W which consists of a fine foam group. At this time, the circumferential flow of the bubbles W discharged from the respective discharge channels 102 is blocked by the adjacent mounting pieces 101c. Thereby, the swirl | vortex flow of the bubble W discharged | emitted from each discharge flow path 102 is suppressed, and the gas-liquid separation of the bubble W is suppressed by extension. Further, the volume of the space S14 is reduced by the lid portion 101a of the plate member 101 protruding into the space S14, so that the amount of bubbles attached to the impeller 100 in the space S14 is reduced. Thereby, the energy consumption required for rotation of the impeller 100 is reduced.

As described above in detail, according to this embodiment, in addition to the same effects as (1), (2), (6), (9) to (11) in the first embodiment, the following effects are obtained. Be able to.
(1) In the present embodiment, the bubble W led out from the mixing chamber C11 on the outer peripheral side of the impeller 100 is blocked by the plate member 101 (attachment piece 101c) in the circumferential direction thereof, to the discharge port 34c. The swirling flow at the time of discharging can be suppressed. Therefore, gas-liquid separation of the bubbles W caused by the swirling flow can be suppressed, and the foam quality can be suitably maintained. Further, the pipe loss resistance caused by the swirling flow can be reduced, and accordingly, the intake pressure of the compressed air and the supply pressure of the soap water can be reduced. As a result, for example, the load on the compressor 37 that introduces compressed air into the mixing chamber C11 can be reduced. As a result, the compressor 37 can be reduced in specification and cost. Further, since the swirl flow can be suppressed in a small space where the plate member 101 can be disposed, the load on the electric motor 91 that rotationally drives the impeller 100 can be reduced correspondingly, and as a result, the electric motor 91 can be reduced in specifications. Cost reduction is possible.

  (2) In the present embodiment, the volume of the space S14 is reduced by the plate member 101 (lid portion 101a) to reduce the amount of bubbles adhering to the impeller 100, thereby reducing the energy consumption required for the rotation of the impeller 100. be able to. As a result, the specification and cost of the electric motor 91 that rotates the impeller 100 can be reduced.

  (3) In this embodiment, gas-liquid mixing (and gas-liquid dispersion on the flat surface 95) is performed only in the one-stage mixing chamber C11. As a result, after the inflowing fluid is dispersed all around the inside of the cylinder 93f, the surface movement which is the outer side (outer peripheral side) of the impeller 100 after passing through the region where the surface moving speed is low inside the impeller 100 (center side). It is possible to provide a configuration in which a region having a high speed is allowed to pass and then discharged. That is, a configuration is provided in which an area with a large flow velocity difference is passed after passing through an area with a small flow velocity difference that gives the inflowing fluid to the gas-liquid interface, and then discharged. On the other hand, for example, when the inflowing fluid passes through the region where the surface moving speed is low after passing through the region where the surface moving speed of the impeller 100 is high, that is, the inflowing fluid passes through the region where the flow velocity difference is large and then passes through the region where the flow velocity difference is small. In this case, in the region where the flow rate difference is small, it is not possible to sufficiently obtain the effect of reducing the bubbles as compared with the region where the flow rate difference is large. For this reason, in the region where the flow rate difference is small, the impeller 100 is rotated while mainly receiving the viscous resistance of bubbles, and energy is excessively consumed. Therefore, since the energy efficiency required for gas-liquid mixing can be raised by setting it as the same structure, the fine foam group (bubble W) can be produced | generated by a more compact structure. In addition, the load on the electric motor 91 that rotationally drives the impeller 100 can be reduced, and as a result, the specification and cost of the electric motor 91 can be reduced.

(4) In this embodiment, the plate member 101 has a symmetrical structure with no direction around the center line O, so that its assembling property can be improved.
In addition, you may change the said embodiment as follows.

In the first embodiment, the groove 83 may be formed in a groove shape such as a semicircle or a triangle.
-In the said 1st Embodiment, it may replace with the groove part 83 as a liquid conveyance part, for example, may employ | adopt a slat.

In the first embodiment, the groove 83 is not necessarily parallel to the center line O, and may be inclined linearly or spirally with respect to the center line O.
In the first embodiment, the second cylindrical portion 75a, the first fixed side peripheral walls 75e, 75f, the second fixed side peripheral walls 75g, 75h, the third cylindrical portion 78a, the third fixed side peripheral walls 78e, 78f, the first The outer peripheral surfaces and inner peripheral surfaces of the movable side peripheral walls 82d and 82e, the second movable side peripheral walls 84b and 84c, and the third movable side peripheral walls 84d and 84e do not need to be so-called perfect circles, and the first and second impellers 82, You may flatten in the range which does not inhibit rotation of 84.

  In the first embodiment, the outer peripheral surface and the inner peripheral surface of the first cylindrical portion 74f, the lid-side peripheral wall 74g, and the upstream-side peripheral wall 82b do not need to be so-called perfect circles and inhibit the rotation of the first impeller 82. You may flatten in the range which does not.

  In the second embodiment, the outer peripheral surface and the inner peripheral surface of the first cylindrical portion 93d, the fixed peripheral walls 93e and 93f, and the movable peripheral walls 100e and 100f do not need to be so-called perfect circles, and the impeller 100 rotates. It may be flat as long as it does not hinder.

  In the second embodiment, the plate member has a disk shape having an outer diameter equivalent to the inner diameter of the mounting wall 93g and having a plurality of holes (discharge flow paths) formed at equiangular intervals on the peripheral edge. There may be.

In each of the above embodiments, the rectifying plates 76, 79, and 94 are not necessarily parallel to the center line O, and may be inclined linearly or spirally with respect to the center line O.
-This invention may produce | generate a fine foam group for uses other than foam bathing, for example, washing | cleaning, such as hand-washing.

-The structure provided with the circulation pump, the foam inflow part, and the foam outflow part independent of the bathtub 10 may be sufficient as this invention.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

(A) In the fine foam group generator according to claim 5,
The apparatus for generating a fine foam group, wherein the upstream impeller is integrally formed with the impeller so that the upstream disk portion and the disk portion overlap each other. According to this configuration, the number of parts can be reduced.

(B) In the fine foam group generation device according to any one of claims 1 to 5 and (a) above,
The said mixing chamber is arranged in multiple stages in the direction of the said centerline, The fine foam group production | generation apparatus characterized by the above-mentioned. According to this configuration, a finer group of fine bubbles can be generated by repeating gas-liquid mixing in the plurality of mixing chambers.

  C1 ... first mixing chamber (mixing chamber), C2 ... second mixing chamber (mixing chamber), C3 ... third mixing chamber (mixing chamber), C11 ... mixing chamber, L ... introduction path, O ... center line, W ... Foam, 34c ... discharge port, 74, 93 ... first casing (casing), 74a ... lid body, 74d ... swirl flow path, 74e ... air supply port, 74f ... first cylinder part (cylinder part), 74g ... lid body side Peripheral wall, 75 ... second casing (casing), 75a ... second cylinder part (cylinder part), 75c, 78c ... inner flange, 75e, 75f ... first fixed side peripheral wall (fixed side peripheral wall), 75g, 75h ... second Fixed side peripheral wall (fixed side peripheral wall), 76, 79, 94 ... current plate, 77, 80, 95 ... flat surface, 78 ... third casing (casing), 78a ... third cylinder part (cylinder part), 78e, 78f ... 3rd fixed side peripheral wall (fixed side peripheral wall), 82 ... 1st impeller (impeller, upstream Impeller), 82a ... first disk part (disk part, upstream disk part), 82b ... upper peripheral wall, 82d, 82e ... first movable side peripheral wall (movable side peripheral wall), 83 ... groove part (liquid transport part) ), 84 ... second impeller (impeller), 84a ... second disc part (disc part), 84b, 84c ... second movable side peripheral wall (movable side peripheral wall), 84d, 84e ... third movable side peripheral wall (movable) Side peripheral wall) 93a ... Lid (inner flange), 93d ... First cylinder part (cylinder part), 93e, 93f ... Fixed side peripheral wall, 100 ... Impeller, 100d ... Disc part, 100e, 100f ... Movable side peripheral wall, 101 ... plate member, 102 ... discharge flow path.

Claims (7)

A casing having a cylindrical tube portion, an annular inner flange provided in the tube portion, and a plurality of cylindrical fixed side peripheral walls projecting from the inner flange concentrically with the tube portion When,
A disc portion rotatably disposed in the casing around the center line of the cylindrical portion, the cylindrical portion, the fixed side peripheral wall adjacent to the cylindrical portion, and the adjacent fixed side peripheral wall. An impeller having a plurality of cylindrical movable side peripheral walls projecting from the disk part concentrically with respect to the cylinder part;
A plurality of rectifying plates that protrude from the cylindrical portion and the fixed peripheral wall at intervals in the circumferential direction so as to face the movable peripheral walls, and extend along the center line,
A mixing chamber formed between the casing and the impeller, and folded alternately in one side direction and the other side direction of the center line,
A fine foam group generating device, wherein a gas and a liquid introduced into the mixing chamber are mixed by rotation of the impeller to generate bubbles. In the fine foam group production | generation apparatus of Claim 1,
An apparatus for generating a fine foam group, wherein an end face of the inner flange facing the impeller in the direction of the center line is formed flat. In the fine foam group production | generation apparatus of Claim 1 or 2,
A swirl passage disposed on the upstream side of the mixing chamber and swirling a flow of liquid introduced into the mixing chamber;
An apparatus for generating a fine foam group, comprising: an air supply port that is arranged in an intermediate portion of the swirl flow path and supplies gas introduced into the mixing chamber. In the fine foam group production | generation apparatus of Claim 3,
The rotation direction of the impeller is set in the direction opposite to the flow direction in which the liquid swirls in the swirling flow path. In the fine foam group production | generation apparatus as described in any one of Claims 1-4,
A lid disposed on the upstream side of the mixing chamber and closing the open end of the cylindrical portion;
A cylindrical lid side peripheral wall projecting from the lid on a concentric circle with respect to the cylindrical portion;
An upstream disk part disposed in the casing so as to be rotatable around the center line on the upstream side of the mixing chamber, and disposed between the cylinder part and the lid side peripheral wall and concentrically with respect to the cylinder part An upstream impeller having a cylindrical upstream peripheral wall projecting from the upstream disk portion;
A plurality of liquid transporting portions that are arranged in the circumferential direction on the upstream peripheral wall so as to face the cylindrical portion and extend along the center line,
An introduction path formed between the casing and the upstream impeller, which is folded back in one side direction and the other side direction of the center line to introduce gas and liquid into the mixing chamber,
A fine foam group generating apparatus, wherein gas and liquid in the introduction path are diffused by rotation of the upstream impeller. In the fine foam group production | generation apparatus as described in any one of Claims 1-5,
A plate member disposed on the downstream side of the mixing chamber; and a discharge port disposed on the downstream side of the plate member, wherein the plate member introduces air bubbles led out from the mixing chamber on the outer peripheral side of the impeller. A fine foam group generating apparatus characterized in that the flow of water is cut off and discharged to the discharge port.   The fine foam group generation device according to any one of claims 1 to 6, wherein a foam composed of a fine foam group is produced by mixing air as a gas and a surfactant-containing liquid as a liquid. Equipped with a bubble bath.

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