JP4878003B2 - Bubble generator and bubble generator - Google Patents

Description

  The present invention relates to a bubble generator that generates fine bubbles in a liquid and a bubble generation device including the bubble generator.

  Conventionally, an apparatus for generating fine bubbles in a liquid has been developed (see, for example, Patent Document 1).

  The fine bubble bath apparatus described in Patent Document 1 includes a saturated solution manufacturing apparatus and a bubble generation nozzle. In this fine bubble bath apparatus, gas is dissolved in the liquid by the saturated solution manufacturing apparatus, and the liquid is supplied to the bubble generation nozzle. The bubble generating nozzle is provided with an orifice and a net member.

In the fine bubble bath device described above, the liquid supplied from the saturated solution manufacturing device to the bubble generation nozzle is pressure-released at the orifice. Thereby, fine bubbles are generated in the liquid. The liquid that has passed through the orifice passes through the mesh member. Thereby, the bubbles in the liquid are further refined.
Japanese Patent Laid-Open No. 2005-34624

  However, when the mesh member is provided in the bubble generating nozzle as described above, suspended matters in the liquid are deposited on the mesh member. In this case, it becomes difficult to efficiently miniaturize the bubbles. Moreover, there exists a possibility that the bubble size may become non-uniform. Therefore, in the configuration in which the bubbles are made fine by the net member, the fine bubbles cannot be stably generated in the liquid.

  Further, when the mesh member is removed from the bubble generating nozzle, that is, when fine bubbles are generated only by the orifice, it is prevented that suspended matters in the liquid are deposited in the bubble generating nozzle. Fine bubbles cannot be generated sufficiently.

  An object of the present invention is to provide a bubble generator capable of stably generating fine bubbles in a liquid, and a bubble generating apparatus including the bubble generator.

  (1) A bubble generator according to a first invention is a bubble generator that generates bubbles in a liquid, and has a cylindrical main body portion having an inflow port through which liquid flows and an outflow port from which liquid flows out; A first bubble generating plate that is provided so as to partition the upstream space and the downstream space in the main body and has a first flow hole for guiding liquid from the upstream space to the downstream space; and the downstream space of the main body A moving member provided so as to be movable in the axial direction of the main body, and a biasing member that biases the moving member toward the upstream side in the axial direction, the cross-sectional area of the first flow hole being the area of the inlet The smaller moving member has one surface facing the first flow hole.

  In this bubble generator, the liquid that has flowed into the upstream space in the main body from the inflow port flows into the downstream space through the first flow hole of the first bubble generation plate. Here, the cross-sectional area of the first flow hole is smaller than the area of the inflow port. Therefore, when the liquid flows from the upstream space into the first flow hole, the flow velocity of the liquid increases and the pressure of the liquid decreases. Thereby, the gas dissolved in the liquid appears as bubbles.

  Further, when the liquid flows out from the first flow hole to the downstream space, the flow velocity of the liquid decreases and the pressure of the liquid increases. Thereby, the bubbles in the liquid are crushed. As a result, bubbles in the liquid are miniaturized.

  The moving member has one surface facing the first flow hole and is urged toward the upstream side by the urging member. In this case, the distance between the first bubble generating plate and the moving member varies depending on the flow velocity and pressure of the liquid flowing out from the first circulation hole.

  Here, the amount and size of the fine bubbles generated in the liquid between the first bubble generating plate and the moving member are the distance between the flow rate and pressure of the liquid and the first bubble generating plate and the moving member. It changes according to the relationship.

  Therefore, it has an appropriate urging force so that the distance between the first bubble generation plate and the moving member is adjusted to an appropriate size according to the flow velocity and pressure of the liquid flowing out from the first flow hole. By providing the urging member, it is possible to generate an appropriate amount and an appropriate size of fine bubbles. Thereby, even when the flow rate and pressure of the liquid fluctuate, fine bubbles can be generated stably.

  Further, in this bubble generator, no mesh member is used to generate fine bubbles. Thereby, it is possible to prevent the suspended matter in the liquid from being deposited in the main body. As a result, it is possible to prevent the generation amount of the fine bubbles in the bubble generator from decreasing and to prevent the size of the fine bubbles from becoming uneven.

  As a result, fine bubbles can be stably generated in the liquid.

  (2) The biasing member may be a coil spring. In this case, the bubble generator can be easily manufactured and the manufacturing cost of the bubble generator can be reduced.

  (3) The bubble generator further includes a second bubble generation plate provided on the downstream side of the moving member in the main body, and having a second flow hole for guiding liquid from the moving member side to the outlet side, The cross-sectional area of the flow hole may be smaller than the area of the inlet.

  In this case, when the liquid flows into the second flow hole from the moving member side in the main body, the liquid flow velocity increases and the liquid pressure decreases. Thereby, the gas dissolved in the liquid appears as bubbles.

  Further, when the liquid flows out from the second flow hole to the outlet side, the flow velocity of the liquid decreases and the pressure of the liquid increases. Thereby, the bubbles in the liquid are crushed. As a result, bubbles in the liquid are miniaturized.

  As a result, fine bubbles can be reliably generated in the liquid.

(4) A bubble generator according to a reference example is a bubble generator that generates bubbles in a liquid, and has a cylindrical main body portion having an inflow port through which the liquid flows in and an outflow port through which the liquid flows out; The first bubble generating plate having a first flow hole provided to partition the upstream space and the downstream space and guiding the liquid from the upstream space to the downstream space, and the downstream space of the main body portion. And the cross-sectional area of the first flow hole is smaller than the area of the inflow port.

  In this bubble generator, the liquid that has flowed into the upstream space in the main body from the inflow port flows into the downstream space through the first flow hole of the first bubble generation plate. Here, the cross-sectional area of the first flow hole is smaller than the area of the inflow port. Therefore, when the liquid flows from the upstream space into the first flow hole, the flow velocity of the liquid increases and the pressure of the liquid decreases. Thereby, the gas dissolved in the liquid appears as bubbles.

  Further, when the liquid flows out from the first flow hole to the downstream space, the flow velocity of the liquid decreases and the pressure of the liquid increases. Thereby, the bubbles in the liquid are crushed. As a result, bubbles in the liquid are miniaturized.

  A spiral member is provided in the downstream space. In this case, a part of the liquid flowing out from the first through hole to the downstream space flows spirally along the spiral member. Thereby, a part of the liquid flows as a swirling flow in the downstream space. As a result, cavitation occurs in the liquid in the downstream space, and fine bubbles are generated.

  Further, in this bubble generator, no mesh member is used to generate fine bubbles. Thereby, it is possible to prevent the suspended matter in the liquid from being deposited in the main body. As a result, it is possible to prevent the generation amount of the fine bubbles in the bubble generator from decreasing and to prevent the size of the fine bubbles from becoming uneven.

  As a result, fine bubbles can be stably generated in the liquid.

  (5) The spiral member may be a coil spring. In this case, the bubble generator can be easily manufactured and the manufacturing cost of the bubble generator can be reduced.

  (6) The bubble generator further includes a second bubble generation plate that is provided on the downstream side of the spiral member in the main body portion and has a second flow hole that guides the liquid from the spiral member side to the outlet side, The cross-sectional area of the second flow hole may be smaller than the area of the inlet.

  In this case, when the liquid flows into the second flow hole from the spiral member side in the main body, the liquid flow rate increases and the liquid pressure decreases. Thereby, the gas dissolved in the liquid appears as bubbles.

  Further, when the liquid flows out from the second flow hole to the outlet side, the flow velocity of the liquid decreases and the pressure of the liquid increases. Thereby, the bubbles in the liquid are crushed. As a result, bubbles in the liquid are miniaturized.

  As a result, fine bubbles can be reliably generated in the liquid.

  (7) The first flow hole may have a cross section that discontinuously expands from the upstream side to the downstream side. In this case, the flow velocity of the liquid is reduced and the pressure of the liquid is increased in the area enlarged portion in the first flow hole. Thereby, the bubbles in the liquid are crushed. As a result, the bubbles in the liquid can be sufficiently miniaturized.

  (8) The first flow hole may have a circular cross section. In this case, the change in pressure of the liquid in the first flow hole can be increased. Thereby, fine bubbles can be generated in the liquid more reliably.

  (9) The first flow hole may have a slit-shaped cross section. In this case, it is possible to prevent the suspended matter in the liquid from being accumulated in the first flow hole. Thereby, fine bubbles can be generated in the liquid more stably. Moreover, since the formation of the first flow hole is facilitated, the manufacturing cost of the bubble generator can be reduced.

  (10) The first bubble generating plate may have a plurality of first flow holes. In this case, a sufficient amount of fine bubbles can be generated by the first bubble generation plate.

  (11) The bubble generator may further include a cylindrical member provided at the downstream end of the main body. In this case, the state of the fine bubbles generated in the main body can be stabilized in the cylindrical member. Thereby, it is possible to prevent the fine bubbles generated in the bubble generator from disappearing in a short time.

(12) A bubble generator according to a second invention is a gas dissolver that dissolves a gas in a liquid, and a first invention that generates fine bubbles in a liquid connected to the gas dissolver and supplied from the gas dissolver. And a bubble generator according to the above.

  In this bubble generating device, since the liquid in which the gas is dissolved in the gas dissolver is supplied to the bubble generator, it is possible to reliably generate fine bubbles in the liquid in the bubble generator.

  (13) The gas dissolver includes first and second pressurization chambers, a first ejection unit that ejects liquid toward the first pressurization chamber, and a second liquid that is contained in the first pressurization chamber. There may be provided a second ejection portion that ejects toward the pressurizing chamber and a liquid outflow portion that causes the liquid to flow out from the second pressurizing chamber.

  In this case, the liquid is pressurized and stirred in the first and second pressure chambers. Thereby, gas can be reliably dissolved in the liquid in the first and second pressurizing chambers. As a result, a sufficient amount of fine bubbles can be generated in the bubble generator.

  (14) The second pressurizing chamber has a liquid supply space that communicates with the liquid outflow portion and supplies the liquid to the liquid outflow portion, and the liquid supply space in the direction perpendicular to the liquid outflow direction by the liquid outflow portion is cut off. The area may decrease toward the liquid outflow portion side.

  In this case, the flow velocity of the liquid flowing to the liquid outflow portion in the second pressurizing chamber gradually increases in the liquid supply space. Therefore, it is possible to prevent the liquid flow rate from rapidly increasing in the vicinity of the liquid outflow portion. Thereby, it is possible to reliably prevent bubbles in the liquid from flowing out of the liquid outflow portion on the liquid flow. As a result, fine bubbles can be reliably generated in the bubble generator.

  (15) The first pressurizing chamber has first and second surfaces facing each other, and the first ejecting portion is provided on the first surface of the first pressurizing chamber, and the second ejecting portion Is provided on the second surface of the first pressurizing chamber, and on the second surface, the second ejection part may be separated from the central axis of the liquid ejection direction by the first ejection part.

  In this case, it is possible to prevent the liquid ejected from the first ejection part from directly reaching the second ejection part. Therefore, even when bubbles generated in the liquid move in the flow of the liquid in the first pressurizing chamber when the liquid is ejected from the first ejecting portion, the bubbles are in the second time in a short time. Reaching the ejection part can be prevented. Thereby, the bubbles can be retained in the liquid for a sufficient time in the first pressurizing chamber, and the bubbles can be prevented from flowing out from the second ejection portion to the second pressurizing chamber. . As a result, a sufficient amount of gas can be dissolved in the liquid in the first pressure chamber, and the amount of fine bubbles generated in the bubble generator can be improved.

  (16) The bubble generating device is provided between the first ejection portion and the second ejection portion in the first pressurizing chamber, and changes the flow direction of the liquid ejected from the first ejection portion. One change plate may be further provided.

  In this case, when the bubbles flow in the first pressurizing chamber and flow from the first ejection portion toward the second ejection portion in the liquid flow, the movement direction of the bubbles is changed in the first change plate. Can be made. Thereby, the bubbles can be retained in the liquid in the first pressurizing chamber for a further sufficient time, and the bubbles are reliably prevented from flowing out from the second ejection portion to the second pressurizing chamber. be able to. As a result, the gas can be reliably dissolved in the liquid in the first pressurizing chamber, and the amount of fine bubbles generated in the bubble generator can be reliably improved.

  (17) The first change plate may be provided substantially parallel to the central axis of the liquid ejection direction by the first ejection part.

  In this case, even when the liquid ejected from the first ejection section flows in a direction different from the direction in which the liquid is ejected by the first ejection section in the first pressurizing chamber, The flow direction can be changed reliably. Thereby, it is possible to reliably prevent the liquid ejected from the first ejection part from directly reaching the second ejection part.

  (18) The first change plate may be provided substantially perpendicular to the central axis of the liquid ejection direction by the first ejection section.

  In this case, the first change plate can prevent the liquid ejected from the first ejection part from going straight in the first pressurizing chamber. Thereby, even when the second ejection part is provided on the axis of the first ejection part, the liquid ejected from the first ejection part directly reaches the second ejection part. It can be surely prevented.

  (19) The first change plate may be provided so as to be inclined with respect to the central axis in the liquid ejection direction by the first ejection part.

  In this case, even when the liquid ejected from the first ejection section flows in a direction different from the direction in which the liquid is ejected by the first ejection section in the first pressurizing chamber, The flow direction can be changed reliably. Thereby, it is possible to reliably prevent the liquid ejected from the first ejection part from directly reaching the second ejection part.

  (20) The bubble generating device is provided between the second ejection part and the liquid outflow part in the second pressurizing chamber, and changes the flow direction of the liquid ejected from the second ejection part. You may further provide a change board.

  In this case, even when the bubbles flow in the second pressurizing chamber and flow from the second ejection portion toward the liquid outflow portion, the movement direction of the bubbles is changed by the second change plate. Can do. Accordingly, the bubbles can be retained in the liquid for a sufficient time in the second pressurizing chamber, and the bubbles can be reliably prevented from flowing out from the liquid outflow portion to the bubble generator. As a result, the gas can be reliably dissolved in the liquid in the second pressurizing chamber, and the amount of fine bubbles generated in the bubble generator can be reliably improved.

  (21) The second change plate may be provided substantially parallel to the central axis in the liquid ejection direction by the second ejection section.

  In this case, even when the liquid ejected from the second ejection section flows in a direction different from the direction in which the liquid is ejected by the second ejection section in the second pressurizing chamber, The flow direction can be changed reliably. Thereby, it is possible to reliably prevent the liquid ejected from the second ejection part from directly reaching the liquid outflow part.

  (22) The second change plate may be provided substantially perpendicular to the central axis of the liquid ejection direction by the second ejection part.

  In this case, the second change plate can prevent the liquid ejected from the second ejection section from going straight in the second pressurizing chamber. Thereby, even when the liquid outflow part is provided on the axis of the second ejection part, it is ensured that the liquid ejected from the second ejection part directly reaches the second ejection part. Can be prevented.

  (23) The second change plate may be provided so as to be inclined with respect to the central axis of the liquid ejection direction by the second ejection part.

  In this case, even when the liquid ejected from the second ejection section flows in a direction different from the direction in which the liquid is ejected by the second ejection section in the second pressurizing chamber, The flow direction can be changed reliably. Thereby, it is possible to reliably prevent the liquid ejected from the second ejection part from directly reaching the liquid outflow part.

  According to the present invention, in the bubble generator, when the liquid flows from the upstream space into the first flow hole, the flow velocity of the liquid increases and the pressure of the liquid decreases. Thereby, the gas dissolved in the liquid appears as bubbles.

  Further, when the liquid flows out from the first flow hole to the downstream space, the flow velocity of the liquid decreases and the pressure of the liquid increases. Thereby, the bubbles in the liquid are crushed. As a result, bubbles in the liquid are miniaturized.

  In addition, an appropriate biasing force is provided so that the distance between the first bubble generation plate and the moving member is adjusted to an appropriate size according to the flow velocity and pressure of the liquid flowing out from the first flow hole. By providing the urging member, it is possible to generate an appropriate amount and an appropriate size of fine bubbles. Thereby, even when the flow rate and pressure of the liquid fluctuate, fine bubbles can be generated stably.

  Further, no mesh member is used to generate fine bubbles. Thereby, it is possible to prevent the suspended matter in the liquid from being deposited in the main body. As a result, it is possible to prevent the generation amount of the fine bubbles in the bubble generator from decreasing and to prevent the size of the fine bubbles from becoming uneven.

  A spiral member is provided in the downstream space. In this case, a part of the liquid flowing out from the first through hole to the downstream space flows spirally along the spiral member. Thereby, a part of the liquid flows as a swirling flow in the downstream space. As a result, cavitation occurs in the liquid in the downstream space, and fine bubbles are generated.

  Further, since the liquid in which the gas is dissolved in the gas dissolver is supplied to the bubble generator, it is possible to reliably generate fine bubbles in the liquid in the bubble generator.

  As a result, fine bubbles can be stably generated in the liquid.

  Hereinafter, a bubble generator and a bubble generator according to embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
(1) Configuration of Bubble Generation Device FIG. 1 is a diagram illustrating an example of a bubble generator and a bubble generation device including the bubble generator according to the first embodiment of the present invention.

  As shown in FIG. 1, bubble generating apparatus 1000 according to the present embodiment includes bubble generator 100 and gas dissolution tank 200. The gas dissolution tank 200 is provided with an air valve 250.

  The bubble generator 100 and the gas dissolution tank 200 are connected by a liquid circulation pipe 300. The bubble generator 100 is immersed in the water 701 at the lower part in the bathtub 700. One end of a liquid supply pipe 400 is connected to the gas dissolution tank 200. The other end of the liquid supply pipe 400 is connected to a tap faucet 500.

  In bubble generating apparatus 1000 according to the present embodiment, water 701 is supplied from bathtub faucet 500 into bathtub 700 through liquid supply pipe 400, gas dissolution tank 200, liquid circulation pipe 300, and bubble generator 100. .

  In the gas dissolution tank 200, air is dissolved in the water 701. The bubble generator 100 turns the air dissolved in the water 701 in the gas dissolution tank 200 into fine bubbles. Thereby, fine bubbles are supplied to the water 701 in the bathtub 700.

  Hereinafter, the gas dissolution tank 200 and the bubble generator 100 will be described with reference to the drawings.

(2) Gas dissolution tank First, the gas dissolution tank 200 is demonstrated.

  FIG. 2 is an external perspective view showing the gas dissolution tank 200, and FIG. 3 is a schematic cross-sectional view showing the gas dissolution tank 200.

  As shown in FIGS. 2 and 3, the gas dissolution tank 200 has a cylindrical casing 201. A disc-shaped upper lid 202 is provided at the upper end of the casing 201, and a disc-shaped lower lid 203 is provided at the lower end of the casing 201. In addition, a disc-shaped partition plate 204 is provided at a substantially central portion in the housing 201. The inside of the housing 201 is divided into an upper space 205 and a lower space 206 by the partition plate 204.

  Cylindrical connecting pipe portions 221 and 231 are formed on the upper surface of the upper lid 202 so as to extend upward. A liquid circulation pipe 400 of FIG. 1 is connected to the connecting pipe part 221. Further, a jet nozzle 251 is provided in the connecting pipe portion 221 so that the lower end protrudes into the upper space 205.

  The air valve 250 of FIG. 1 is attached to the connecting pipe portion 231. As shown in FIG. 3, the air valve 250 has a cylindrical main body 521 and a lid 522 attached to the upper end of the main body 521. A cylindrical through hole 530 is formed inside the lid portion 522. The internal space of the main body 521 and the outside of the main body 521 are communicated with each other through a through hole 530. In addition, the internal space of the main body 521 and the upper space 205 of the gas dissolution tank 200 are communicated with each other through the internal space of the connecting portion 231.

  In the main body portion 521, four substantially L-shaped guide members 523 (only three are shown in FIG. 3) are provided along the inner peripheral surface of the main body portion 521. Further, a disc-shaped moving member 524 is provided in the main body 521 so as to be slidable up and down with respect to the guide member 523. The diameter of the moving member 524 is smaller than the inner diameter of the main body 521, and a space is formed between the outer peripheral surface of the moving member 524 and the inner peripheral surface of the main body 521.

  The moving member 524 is moved up and down according to the pressure in the upper space 205 of the gas dissolution tank 200. Specifically, when the pressure in the upper space 205 is high, the moving member 524 is moved upward. Thereby, the opening at the lower end of the through hole 530 is closed by the moving member 524. As a result, it is possible to prevent the air in the upper space 205 from flowing out of the gas dissolution tank 200.

  Further, when the pressure in the upper space 205 is low, the moving member 524 is moved downward, and the opening at the lower end of the through hole 530 is opened. Thereby, air outside the gas dissolution tank 200 is supplied into the upper space 205 through the through hole 530. As a result, a sufficient amount of air can be supplied into the upper space 205.

  The partition plate 204 is provided with an ejection nozzle 252 so that the lower end protrudes into the lower space 206. A bubble rising plate 271 is provided on the upper surface of the partition plate 204. The bubble rising plate 271 is located in the vicinity of the ejection nozzle 252 between the ejection nozzle 251 and the ejection nozzle 252. In the present embodiment, the bubble rising plate 271 is vertically attached on the partition plate 204.

  A liquid outflow pipe 261 is provided at the lower portion of the casing 201 so as to communicate the outside of the casing 201 and the lower space 206. A liquid circulation pipe 300 in FIG. 1 is connected to the liquid outflow pipe 261.

  A bubble raising plate 272 is provided on the upper surface of the lower lid 203. The bubble rising plate 272 is located in the vicinity of the liquid outflow pipe 261 between the ejection nozzle 252 and the liquid outflow pipe 261. In the present embodiment, the bubble rising plate 272 is vertically attached on the lower lid 203. A drain valve 262 that opens and closes according to the amount of pressure applied from the water 701 is provided at a substantially central portion of the lower lid 203.

With the above configuration, the water 701 (FIG. 1) from the faucet 500 tap and through the liquid supply pipe 400 is supplied to the gas dissolution tank 200 is jetted from the opening of the lower end of the ejection nozzle 251 into the upper space 205 Is done. Thereby, the water 701 is pressurized and stirred in the upper space 205, and the air in the upper space 205 is dissolved in the water 701.

  Next, the water 701 jetted into the upper space 205 is jetted into the lower space 206 from the opening at the lower end of the jet nozzle 252. Thereby, the water 701 is pressurized and stirred in the lower space 206, and the air (bubbles) jetted into the lower space 206 together with the water 701 from the upper space 205 and the water 701 are dissolved in the water 701. . Thereafter, the water 701 flows out from the liquid outflow pipe 261 to the liquid circulation pipe 300.

  Here, in the gas dissolution tank 200 according to the present embodiment, the ejection nozzle 251 and the ejection nozzle 252 are sufficiently separated in the horizontal direction (direction parallel to the upper lid 202 and the partition plate 204) in the upper space 205. ing. Thereby, it is possible to prevent the water 701 ejected from the ejection nozzle 251 into the upper space 205 from reaching the ejection nozzle 252 directly.

  Accordingly, even when bubbles generated in the water 701 move in the flow of the water 701 in the upper space 205 when the water 701 is ejected from the ejection nozzle 251, the bubbles enter the ejection nozzle 252 in a short time. Reaching can be prevented. Thereby, the bubbles can be retained in the water 701 in the upper space 205 for a sufficient time, and the bubbles can be prevented from flowing out from the ejection nozzle 252 to the lower space 206. As a result, the bubbles can be sufficiently dissolved in the water 701 in the upper space 205.

  In addition, a bubble raising plate 271 is provided between the ejection nozzle 251 and the ejection nozzle 252 on the upper surface of the partition plate 204. In this case, as indicated by an arrow in FIG. 3, the water 701 flowing from the ejection nozzle 251 toward the ejection nozzle 252 collides with the bubble rising plate 271. Thereby, the flow direction of the water 701 is changed upward in the bubble rising plate 271.

  Therefore, even when the air bubble rides on the flow of the water 701 and flows from the ejection nozzle 251 toward the ejection nozzle 252 in the upper space 205, the air bubble can be lifted upward on the bubble ascending plate 271. Thereby, the bubbles can be retained in the water 701 in the upper space 205 for a further sufficient time, and the bubbles can be reliably prevented from flowing out from the ejection nozzle 252 to the lower space 206. As a result, bubbles can be reliably dissolved in the water 701 in the upper space 205.

  Further, the ejection nozzle 252 and the liquid outflow pipe 261 are sufficiently separated in the horizontal direction (a direction parallel to the partition plate 204 and the lower lid 203) in the lower space 206. Thereby, it is possible to prevent the water 701 ejected from the ejection nozzle 252 into the lower space 206 from reaching the liquid outflow pipe 261 directly.

  Therefore, even when the bubbles generated in the water 701 when the water 701 is ejected from the ejection nozzle 252 and the bubbles flowing into the lower space 206 from the upper space 205 move on the flow of the water 701, the bubbles are generated. Reaching the liquid outflow pipe 261 in a short time can be prevented. Thereby, the bubbles can be retained in the water 701 in the lower space 206 for a sufficient time, and the bubbles can be prevented from flowing out from the liquid outflow pipe 261. As a result, bubbles can be sufficiently dissolved in the water 701 in the lower space 206.

  In addition, a bubble raising plate 272 is provided between the ejection nozzle 252 and the liquid outflow pipe 261 on the upper surface of the lower lid 203. In this case, as indicated by an arrow in FIG. 3, the water 701 flowing from the ejection nozzle 252 toward the liquid outflow pipe 261 collides with the bubble rising plate 272. Thereby, the flow direction of the water 701 is changed upward in the bubble rising plate 272.

  Accordingly, even when the bubbles ride on the flow of the water 701 in the lower space 206 and flow from the ejection nozzle 252 side toward the liquid outflow pipe 261 side, the bubbles can be lifted upward on the bubble rising plate 272. Thereby, the bubbles can be retained in the water 701 in the lower space 206 for a sufficient time, and the bubbles can be reliably prevented from flowing out from the liquid outflow pipe 261. As a result, bubbles can be reliably dissolved in the water 701 in the lower space 206.

  Moreover, in this Embodiment, the opening of the lower end of the ejection nozzles 251 and 252 is formed small compared with opening of an upper end. In this case, the speed of water ejected from the ejection nozzles 251 and 252 can be sufficiently increased. Thereby, the water 701 can be sufficiently pressurized and stirred in the upper space 205 and the lower space 206.

  As a result, air can be reliably dissolved in the water 701 in the gas dissolution tank 200.

  When the water tap 500 (FIG. 1) is closed, sufficient pressure is not applied from the water 701 to the drain valve 262. Thereby, the drain valve 262 is opened. Therefore, in the present embodiment, air can be easily supplied from the drain valve 262 into the gas dissolution tank 200 by closing the faucet 500.

(3) Bubble Generator FIG. 4 is an assembled perspective view of the bubble generator 100 of FIG. 1, and FIG. 5 is a longitudinal sectional view of the bubble generator 100 of FIG.

  4 and 5, the bubble generator 100 includes a liquid inflow portion 101, an annular gasket 102, a disk-shaped bubble generation plate 103, a moving plate 104, a spring 105, a fixed plate 106, a cylindrical shape. A housing tube 107 and a substantially L-shaped bubble stabilizing tube 108 are included.

  The liquid inflow portion 101 includes a flange portion 11 having a columnar space therein and a cylindrical portion 12 formed so as to extend upward from the flange portion 11. The internal space of the flange portion 11 and the internal space of the cylindrical portion 12 are in communication.

  A plurality of through holes 31 are formed in the bubble generating plate 103. As shown in FIG. 5, the through hole 31 has a first through hole 311 and a second through hole 312 having a diameter larger than that of the first through hole 311. Note that the through hole 31 is not formed in the center of the bubble generating plate 103.

  The moving plate 104 includes a disk-shaped flange 41 having a columnar space inside and a cylindrical portion 42 formed so as to protrude downward from the flange 41. The internal space of the collar part 41 and the internal space of the cylindrical part 12 are in communication.

  In the present embodiment, the outer diameter of the flange 41 is set so that the plurality of second through holes 312 are positioned inside the flange 41 in the horizontal plane. Therefore, the distance between the inner peripheral surface of the storage tube 107 and the outer peripheral surface of the flange 41 is smaller than the shortest distance between the inner peripheral surface of the storage tube 107 and the second through hole 312. In addition, the distance between the inner peripheral surface of the housing tube 107 and the outer peripheral surface of the flange portion 41 is, for example, preferably 0.5 mm or more, and more preferably 1.0 mm or more.

  As the spring 105, for example, a coil spring having an outer diameter of 5.5 mm, a wire diameter of 0.4 mm, and a free length of 5.0 mm can be used.

  The fixed plate 106 includes a disc-shaped flange 61 and a columnar section 62 formed so as to extend upward from the flange 61. A plurality of through holes 63 are formed in the flange portion 61.

  As shown in FIG. 5, an annular locking portion 71 that protrudes inward is formed on the inner peripheral surface of the lower portion of the storage tube 107.

  In the bubble generator 100 according to the present embodiment, a fixed plate 106, a spring 105, a moving plate 104, a bubble generation plate 103, and a gasket 102 are provided in this order on the locking portion 71 of the housing tube 107. And the liquid inflow part 101 is being fixed to the upper end of the accommodating pipe | tube 107 so that the upper surface of the gasket 102 and the lower surface of the collar part 11 may contact | abut. As a result, the gasket 102, the bubble generation plate 103, and the fixed plate 106 are fixed in the accommodation tube 107.

  A cylindrical portion 62 of the fixed plate 106 is inserted into the internal space of the moving plate 104. Further, the tip of the cylindrical portion 62 is in contact with the central portion of the bubble generating plate 103. Thereby, the moving plate 104 is provided so as to be movable between the bubble generating plate 103 and the fixed plate 106.

  The spring 105 is provided so as to surround the outer peripheral surface of the cylindrical portion 42 of the moving plate 104. The upper end of the spring 105 is in contact with the lower surface of the flange 41 of the moving plate 104, and the lower end is in contact with the upper surface of the fixed plate 106. Thereby, the moving plate 104 is urged upward.

  The bubble stabilizing tube 108 is attached to the lower end of the housing tube 107.

A liquid circulation pipe 300 (see FIG. 1) is connected to the cylindrical portion 12 of the liquid inflow portion 101. Water 701 in which air is dissolved in the gas dissolution tank 200 (FIG. 2) is supplied to the internal space of the liquid inflow portion 101 via the liquid supply pipe 400. The water 701 supplied to the internal space of the liquid inflow portion 101 is an internal space of the gasket 102, a through hole 31 of the bubble generating plate 103, a space between the outer peripheral surface of the moving plate 104 and the inner peripheral surface of the containing tube 107, After passing through the through-hole 63 of the fixed plate 106 and the internal space of the bubble stabilizing tube 108, it is discharged into the bathtub 700 (FIG. 1).

  Here, the sum of the cross-sectional areas of the plurality of through holes 31 of the bubble generating plate 103 is sufficiently smaller than the cross-sectional area of the internal space of the gasket 102. In this case, when the water 701 flows into the plurality of through holes 31 from the internal space of the gasket 102, the flow rate of the water 701 increases and the pressure of the water 701 decreases. Thereby, the air dissolved in the water 701 appears as bubbles.

  In each through hole 31, the cross-sectional area of the second through hole 312 is sufficiently larger than the cross-sectional area of the first through hole 311. In this case, when the water 701 flows from the first through hole 311 into the second through hole 312, the flow rate of the water 701 decreases and the pressure of the water 701 increases. Thereby, the bubbles in the water 701 are crushed. As a result, the bubbles in the water 701 are refined.

  In addition, the cross-sectional area of the internal space of the housing tube 107 is sufficiently larger than the total cross-sectional area of the plurality of second through holes 312. In this case, when the water 701 flows out from the second through hole 312, the flow rate of the water 701 decreases and the pressure of the water 701 increases. Thereby, the bubbles in the water 701 are crushed. As a result, the bubbles in the water 701 are further refined.

  Further, the total cross-sectional area of the plurality of through holes 63 of the fixed plate 106 is sufficiently smaller than the cross-sectional area of the internal space of the receiving tube 107. In this case, when the water 701 flows into the through-hole 63, the flow rate of the water 701 increases and the pressure of the water 701 decreases. Thereby, the air dissolved in the water 701 appears as bubbles.

  In addition, the cross-sectional area of the internal space of the locking portion 71 of the storage tube 107 is sufficiently larger than the total cross-sectional area of the plurality of through holes 63. In this case, when the water 701 flows out of the through-hole 63, the flow rate of the water 701 decreases and the pressure of the water 701 increases. Thereby, the bubbles in the water 701 are crushed. As a result, the bubbles in the water 701 are sufficiently refined.

  Further, the fine bubbles generated in the housing tube 107 are discharged from the bubble generator 100 after passing through the bubble stabilizing tube 108. In this case, the fine bubbles generated in the storage tube 107 can be sufficiently stabilized in the bubble stabilization tube 108. Thereby, it can fully prevent that the fine bubble supplied in the bathtub 700 (FIG. 1) from the bubble generator 100 lose | disappears in a short time. As a result, the number of fine bubbles in the bathtub 700 can be sufficiently increased.

  Further, the moving plate 104 is provided so as to be movable up and down and is urged upward by a spring 105. In this case, the distance L (FIG. 5) between the lower surface of the bubble generating plate 103 and the upper surface of the flange 41 of the moving plate 104 increases or decreases according to the flow velocity and pressure of the water 701 flowing out from the second through hole 312. Is done.

  Here, the amount and size of the fine bubbles generated in the water 701 between the bubble generating plate 103 and the flange portion 41 of the moving plate 104 are the flow rate and pressure of the water 701 flowing out from the second through hole 312. It varies depending on the relationship with the size of the distance L. Therefore, by providing the spring 105 having an appropriate spring constant so that the distance L is adjusted to an appropriate size according to the flow rate and pressure of the water 701, an appropriate amount and an appropriate size of fine bubbles are generated. be able to. Thereby, even when the flow rate and pressure of the water 701 fluctuate, it is possible to stably generate fine bubbles.

(4) Effects of the present embodiment (4-1) Effects of the bubble generator As described above, in the bubble generator 100 according to the present embodiment, the moving plate according to the flow rate and pressure of the internal water 701. 104 is moved. Thereby, the distance L (refer FIG. 5) can be adjusted to an optimal magnitude | size according to the flow velocity and pressure of the water 701. As a result, under various conditions (for example, when the flow rate and pressure of the water 701 are small, when the flow rate and pressure of the water 701 are large, or when the flow rate and pressure of the water 701 supplied to the bubble generator 100 vary) ), Fine bubbles having an appropriate amount and an appropriate size can be stably generated in the water 701.

  Further, by selectively using the springs 105 having various spring constants, the amount and size of the fine bubbles generated in the bubble generator 100 can be adjusted. Therefore, the amount and size of the fine bubbles generated in the bubble generator 100 can be easily adjusted according to various purposes.

  Further, in bubble generator 100 according to the present embodiment, a net member is not used to generate fine bubbles. In this case, it is possible to prevent the suspended matter or the like in the water 701 from being accumulated in the bubble generator 100. Thereby, it can prevent that the generation amount of the fine bubble in the bubble generator 100 falls, and can prevent that the magnitude | size of a fine bubble becomes non-uniform | heterogenous.

  As a result, a sufficient amount of fine bubbles can be stably generated in the water 701 in the bubble generator 100.

(4-2) Effect of Gas Dissolution Tank In the gas dissolution tank 200 according to the present embodiment, the water 701 is pressurized and stirred in two spaces (an upper space 205 and a lower space 206). In this case, since air can be dissolved in the water 701 in each of the upper space 205 and the lower space 206, a sufficient amount of air can be dissolved in the water 701. Therefore, even when the pressure of the water 701 supplied to the gas dissolution tank 200 is low (for example, 0.02 MPa to 0.2 MPa), the air can be reliably dissolved in the water 701.

  Further, in the gas dissolution tank 200 according to the present embodiment, the ejection nozzle 251 and the ejection nozzle 252 are sufficiently separated in the horizontal direction in the upper space 205. In addition, a bubble raising plate 271 is provided between the ejection nozzle 251 and the ejection nozzle 252 on the upper surface of the partition plate 204.

  In this case, bubbles generated in the water 701 when the water 701 is ejected from the ejection nozzle 251 can be prevented from reaching the ejection nozzle 252. Thereby, in the upper space 205, the bubbles can be retained in the water 701 for a sufficient time, and the bubbles can be prevented from flowing out from the ejection nozzle 252 to the lower space 206. As a result, bubbles can be reliably dissolved in the water 701 in the upper space 205.

  Further, in the gas dissolution tank 200 according to the present embodiment, the ejection nozzle 252 and the liquid outflow pipe 261 are sufficiently separated in the horizontal direction in the lower space 206. In addition, a bubble raising plate 272 is provided between the ejection nozzle 252 and the liquid outflow pipe 261 on the upper surface of the lower lid 203.

  In this case, bubbles generated in the water 701 when the water 701 is ejected from the ejection nozzle 252 into the lower space 206 can be prevented from reaching the liquid outflow pipe 261. Thereby, in the lower space 206, the bubbles can be retained in the water 701 for a sufficient time, and the bubbles can be prevented from flowing out from the liquid outflow pipe 261. As a result, bubbles can be reliably dissolved in the water 701 in the lower space 206.

  Further, in the gas dissolution tank 200 according to the present embodiment, water 701 in which a sufficient amount of air is dissolved in the upper space 205 flows into the lower space 206. Thereby, the amount of air 701 dissolved in the lower space 206 can be sufficiently increased.

  As a result, a sufficient amount of air can be reliably dissolved in the water 701 in the gas dissolution tank 200. Thereby, a sufficient amount of fine bubbles can be reliably generated in the water 701 in the bubble generator 100. Further, it is possible to reliably prevent large bubbles from flowing into the bubble generator 100 from the gas dissolution tank 200. Thereby, it is possible to more stably generate fine bubbles in the water 701 in the bubble generator 100.

(5) Other configuration examples of the bubble generator In the above-described embodiment, the moving plate 104 is biased upward by providing the spring 105 on the lower surface side of the flange 41 of the moving plate 104. The moving plate 104 may be urged upward by a method. For example, a spring 105 may be provided between the bubble generation plate 103 and the moving plate 104. In this case, the moving plate 104 can be urged upward by attaching the upper end of the spring 105 to the lower surface of the bubble generating plate 103 and attaching the lower end of the spring 105 to the upper surface of the flange 41.

  Further, the member for urging the moving plate 104 upward is not limited to the spring 105. For example, the moving plate 104 may be urged upward by an elastic member such as elastic rubber.

  In the above embodiment, the case where the substantially L-shaped bubble stabilizing tube 108 is provided has been described. However, another shape of the bubble stabilizing tube 108 may be provided. For example, a straight tube-shaped bubble stabilizing tube 108 may be provided.

  Further, a bowl-shaped portion may be formed at the opening end on the downstream side of the bubble stabilizing tube 108. In this case, the fine bubbles in the water 701 can be prevented from flowing out into the bathtub 700 by the upper part of the ridge. As a result, the fine bubbles generated in the storage tube 107 can be retained in the bubble stabilizing tube 108 for a long time, so that the fine bubbles can be more reliably stabilized.

  In addition, a detachable filter for removing suspended matters in the water 701 may be provided in the liquid inflow portion 101. In addition, when germanium is used as the filter medium of the filter, the warm bath effect in the bathtub 700 can be improved.

  In the above embodiment, the bubble generation plate 103 in which the through-hole 31 having a circular cross section is formed has been described. However, instead of the bubble generation plate 103, a bubble generation plate having another configuration may be used.

  FIG. 6 is a diagram showing another example of the bubble generation plate. 6A is a top view of the bubble generating plate, and FIG. 6B is a cross-sectional view taken along line AA of FIG.

  As shown in FIG. 6A, the bubble generating plate 109 in this example has two through holes 91 extending in one direction and formed in parallel to each other. As shown in FIG. 6B, the through hole 91 includes a narrow portion 911 and a wide portion 912 having a width wider than the narrow portion 911.

  When the bubble generation plate 109 is provided in the bubble generator 100 of FIGS. 4 and 5, as in the bubble generation plate 103, the efficiency in the water 701 is increased by the pressure change of the water 701 in the narrow portion 911 and the wide portion 912. Fine bubbles can be generated well.

  Further, in the bubble generation plate 109 in this example, since the through hole 91 is formed so as to extend in one direction, the processing of the through hole 91 is easy. Thereby, the manufacturing cost of the bubble generator 100 can be reduced.

  Further, in this example, since the through hole 91 having a sufficient size can be formed, it is possible to prevent the through hole 91 from being blocked by a suspended matter in the water 701 or the like. Thereby, it becomes possible to generate fine bubbles in the water 701 more stably.

<Second Embodiment>
(1) Bubble generator The bubble generator according to the second embodiment is different from the bubble generator 100 of FIGS. 4 and 5 in the following points.

  FIG. 7 is an assembled perspective view of the bubble generator 600 according to the second embodiment, and FIG. 8 is a longitudinal sectional view of the bubble generator 600.

  As shown in FIGS. 7 and 8, the bubble generator 600 according to the present embodiment includes a liquid inflow portion 101, a gasket 102, a disk-shaped bubble generation plate 603, a spring 105, a disk-shaped fixing plate 606, A cylindrical accommodation tube 607 and a bubble stabilizing tube 108 are included. In addition, as the liquid inflow part 101, the gasket 102, the spring 105, and the bubble stabilization pipe | tube 108, the thing similar to the liquid inflow part 101, the gasket 102, the spring 105, and the bubble stabilization pipe | tube 108 of FIG. 4 and FIG. 5 can be used. .

  A plurality of through holes 31 are formed in the bubble generation plate 603. The through-hole 31 has a small-diameter first through-hole 311 and a large-diameter second through-hole 312, similarly to the through-hole 31 in FIGS. 4 and 5. Moreover, in the bubble generation plate 603 according to the present embodiment, the through hole 31 is also formed in the central portion.

  A plurality of through holes 63 are formed in the fixed plate 606. As shown in FIG. 8, a locking portion 71 is formed on the inner peripheral surface of the lower portion of the storage tube 607 in the same manner as in FIG. Has been.

  In the bubble generator 600 according to the present embodiment, a fixed plate 606 is provided on the locking portion 71 of the housing tube 607, and the bubble generating plate 603 and the gasket 102 are sequentially provided on the locking portion 72. A spring 105 is provided between 606 and the bubble generation plate 603. And the liquid inflow part 101 is being fixed to the upper end of the accommodating pipe | tube 607 so that the upper surface of the gasket 102 and the lower surface of the collar part 11 may contact | abut. As a result, the gasket 102, the bubble generation plate 603, the spring 105, and the fixed plate 606 are fixed in the accommodation tube 607.

  A liquid supply pipe 400 (see FIG. 1) is connected to the cylindrical portion 12 of the liquid inflow portion 101. Water 701 in which air is dissolved in the gas dissolution tank 200 (FIG. 2) is supplied to the internal space of the liquid inflow portion 101 via the liquid supply pipe 400. The water 701 supplied to the internal space of the liquid inflow portion 101 includes the internal space of the gasket 102, the through hole 31 of the bubble generating plate 103, the space between the bubble generating plate 603 and the fixed plate 606, and the through hole of the fixed plate 606. 63 and after passing through the internal space of the bubble stabilizing tube 108, it is discharged into the bathtub 700 (FIG. 1).

  Here, the sum of the cross-sectional areas of the plurality of through holes 31 of the bubble generating plate 603 is sufficiently smaller than the cross-sectional area of the internal space of the gasket 102. In this case, when the water 701 flows into the plurality of through holes 31 from the internal space of the gasket 102, the flow rate of the water 701 increases and the pressure of the water 701 decreases. Thereby, the air dissolved in the water 701 appears as bubbles.

  In each through hole 31, the cross-sectional area of the second through hole 312 is sufficiently larger than the cross-sectional area of the first through hole 311. In this case, when the water 701 flows from the first through hole 311 into the second through hole 312, the flow rate of the water 701 decreases and the pressure of the water 701 increases. Thereby, the bubbles in the water 701 are crushed. As a result, the bubbles in the water 701 are refined.

  In addition, the cross-sectional area of the internal space of the housing tube 607 is sufficiently larger than the total cross-sectional area of the plurality of second through holes 312. In this case, when the water 701 flows out from the second through hole 312, the flow rate of the water 701 decreases and the pressure of the water 701 increases. Thereby, the bubbles in the water 701 are crushed. As a result, the bubbles in the water 701 are further refined.

  Further, the total cross-sectional area of the plurality of through holes 63 of the fixed plate 606 is sufficiently smaller than the cross-sectional area of the internal space of the housing tube 607. In this case, when the water 701 flows into the through-hole 63, the flow rate of the water 701 increases and the pressure of the water 701 decreases. Thereby, the air dissolved in the water 701 appears as bubbles.

  In addition, the cross-sectional area of the internal space of the locking portion 71 of the storage tube 607 is sufficiently larger than the total cross-sectional area of the plurality of through holes 63. In this case, when the water 701 flows out of the through-hole 63, the flow rate of the water 701 decreases and the pressure of the water 701 increases. Thereby, the bubbles in the water 701 are crushed. As a result, the bubbles in the water 701 are sufficiently refined.

  The fine bubbles generated in the storage tube 607 are discharged from the bubble generator 100 after passing through the bubble stabilizing tube 108. In this case, the fine bubbles generated in the housing tube 607 can be sufficiently stabilized in the bubble stabilizing tube 108. Thereby, it can fully prevent that the fine bubble supplied in the bathtub 700 (FIG. 1) from the bubble generator 100 lose | disappears in a short time. As a result, the number of fine bubbles in the bathtub 700 can be sufficiently increased.

  A spring 105 is provided between the bubble generation plate 603 and the fixed plate 606. In this case, part of the water 701 that has flowed out of the second through hole 312 flows spirally along the spring 105. Thereby, a part of the water 701 flows as a swirling flow in the space between the bubble generating plate 603 and the fixed plate 606. As a result, cavitation occurs in the water 701 and fine bubbles are generated.

(2) Effect of this Embodiment As described above, in the bubble generator 600 according to this embodiment, cavitation can be generated in the water 701 by the spring 105. Thereby, a sufficient amount of fine bubbles can be generated in the water 701 in the housing tube 607.

  In addition, in bubble generator 600 according to the present embodiment, the amount of fine bubbles generated by cavitation can be adjusted by selectively using springs 105 having various shapes. Therefore, the amount and size of the fine bubbles generated in the bubble generator 600 can be easily adjusted according to various purposes.

  Further, in bubble generator 600 according to the present embodiment, a net member is not used to generate fine bubbles. In this case, it is possible to prevent the suspended matter or the like in the water 701 from being accumulated in the bubble generator 600. Thereby, it is possible to prevent the generation amount of the fine bubbles in the bubble generator 600 from being lowered and to prevent the size of the fine bubbles from becoming uneven.

  As a result, a sufficient amount of fine bubbles can be stably generated in the water 701 in the bubble generator 600.

(3) Another configuration example of the bubble generator In the bubble generator 600 of FIGS. 7 and 8, the swirl flow is generated in the water 701 using the coil spring 105, but the swirl into the water 701 is performed by other configurations. A flow may be generated. For example, instead of the coil spring 105, spiral blades may be provided to generate a swirl flow.

<Other examples of gas dissolution tank>
In the above embodiment, the case where the gas dissolving tank 200 shown in FIG. 3 is provided in the bubble generating apparatus 1000 has been described. However, the bubble generating apparatus 1000 can be provided with gas dissolving tanks having various structures. Hereinafter, other examples of the gas dissolution tank will be described with reference to the drawings.

(1) Other Examples of Gas Dissolution Tank (1-1) Structure FIG. 9 is a cross-sectional view showing another example of a gas dissolution tank.

  The gas dissolution tank 800 of FIG. 9 differs from the gas dissolution tank 200 of FIG. 3 in the following points.

  As shown in FIG. 9, the gas dissolution tank 800 in this example includes a housing 201, an upper lid 202, a lower lid 203, and a partition plate 204, similarly to the gas dissolution tank 200 of FIG. 3. The inside of the housing 201 is divided into an upper space 205 and a lower space 206 by a partition plate 204, like the gas dissolution tank 200 of FIG.

  A connecting pipe part 221 is formed at a substantially central part of the upper lid 202. A spout nozzle 251 is provided in the connecting pipe part 221. The partition plate 204 is provided with two ejection nozzles 252. A bubble raising plate 871 is provided below the ejection nozzle 251 in the upper space 205 so as to shield between the ejection nozzle 251 and the two ejection nozzles 252.

  A liquid outflow pipe 261 is provided at a substantially central portion of the lower lid 203. A bubble raising plate 872 is provided below the two ejection nozzles 252 in the lower space 206 so as to shield between the ejection nozzle 252 and the liquid outflow pipe 261.

  As shown in FIG. 9, water 701 is circulated between the bubble rising plate 871 and the inner peripheral surface of the housing 201 and between the bubble rising plate 872 and the inner peripheral surface of the housing 201. Space is provided.

(1-2) Effect in this Example As described above, in the gas dissolution tank 800 in this example, the bubble rising plate 871 is provided below the ejection nozzle 251. In this case, as indicated by an arrow in FIG. 9, the water 701 ejected from the ejection nozzle 251 collides with the bubble rising plate 871. Thereby, the flow direction of the water 701 is changed upward in the bubble rising plate 871.

  Therefore, even when bubbles generated in the water 701 move in the flow of the water 701 in the upper space 205 when the water 701 is ejected from the ejection nozzle 251, the bubbles are moved upward in the bubble rising plate 871. Can surface. Thereby, the bubbles can be retained in the water 701 in the upper space 205 for a sufficient time, and the bubbles can be prevented from flowing out from the ejection nozzle 252 to the lower space 206. As a result, bubbles can be reliably dissolved in the water 701 in the upper space 205.

  Further, in the gas dissolution tank 800 in this example, a bubble raising plate 872 is provided below the ejection nozzle 252. In this case, as shown by an arrow in FIG. 9, the water 701 ejected from the ejection nozzle 252 collides with the bubble rising plate 872. Thereby, the flow direction of the water 701 is changed upward in the bubble rising plate 872.

  Therefore, even when the bubbles generated in the water 701 when the water 701 is ejected from the ejection nozzle 252 and the bubbles flowing into the lower space 206 from the upper space 205 move on the flow of the water 701, the bubbles are also removed. The bubble rising plate 872 can be lifted upward. Thereby, the bubbles can be retained in the water 701 in the lower space 206 for a sufficient time, and the bubbles can be prevented from flowing out from the liquid outflow pipe 261. As a result, bubbles can be reliably dissolved in the water 701 in the lower space 206.

  In the gas dissolution tank 800 in this example, water 701 in which a sufficient amount of air is dissolved in the upper space 205 flows into the lower space 206. Thereby, the amount of air 701 dissolved in the lower space 206 can be sufficiently increased.

  As a result, a sufficient amount of air can be reliably dissolved in the water 701 in the gas dissolution tank 800, and large bubbles can be reliably prevented from flowing into the bubble generator 100 (see FIG. 1). it can.

(2) Still another example of the gas dissolution tank FIG. 10 is a cross-sectional view showing still another example of the gas dissolution tank.

  The gas dissolution tank 900 of FIG. 10 is different from the gas dissolution tank 800 of FIG. 9 in the following points.

  As shown in FIG. 10, in the gas dissolution tank 900 in this example, the bubble raising plate 871 (FIG. 9) is not provided, and the upper space 205 is further divided into two spaces 51 and 52 by the partition plate 207. ing. The partition plate 207 is provided with two ejection nozzles 253 at a position sufficiently separated from the center. In addition, the thing of the same shape as the ejection nozzle 251 and the ejection nozzle 252 can be used as the ejection nozzle 253.

  In the gas dissolution tank 900, since the water 701 is pressurized and stirred in the three spaces (the spaces 51 and 52 and the lower space 206), air can be more reliably dissolved in the water 701.

  Further, the ejection nozzle 251 is provided at the substantially central portion of the upper lid 202, and the two ejection nozzles 253 are not provided at the central portion of the partition plate 207. In this case, water 701 ejected from the ejection nozzle 251 can be prevented from reaching the ejection nozzle 253 directly.

  Therefore, even when bubbles generated in the water 701 move in the water 701 in the space 51 when the water 701 is ejected from the ejection nozzle 251, the bubbles reach the ejection nozzle 253 in a short time. Can be prevented. Thereby, the bubbles can stay in the water 701 in the space 51 for a sufficient time, and the bubbles can be prevented from flowing out from the ejection nozzle 252 into the space 52. As a result, the bubbles can be reliably dissolved in the water 701 in the space 51.

(3) Still another example of the gas dissolution tank FIG. 11 is a diagram showing still another example of the gas dissolution tank.

  The gas dissolution tank 920 in FIG. 11 is different from the gas dissolution tank 200 in FIG. 3 in the following points.

  As shown in FIG. 11, in the gas dissolution tank 920 in this example, an auxiliary space 921 is provided on the side of the lower space 206. The auxiliary space 921 is formed so that the cross-sectional area in the vertical direction gradually decreases outward. The liquid outflow pipe 261 is connected to the tip of the auxiliary space 921, that is, the portion where the cross-sectional area of the auxiliary space 921 is the smallest.

  In this case, the flow rate of the water 701 flowing from the lower space 206 to the liquid outflow pipe 261 gradually increases in the auxiliary space 921. Therefore, in the gas dissolution tank 920 in this example, it is possible to prevent the flow rate of the water 701 from rapidly increasing in the vicinity of the liquid outflow pipe 261. Thereby, it is possible to reliably prevent bubbles in the water 701 from flowing out of the liquid outflow pipe 261 on the flow of the water 701. As a result, fine bubbles can be reliably generated in the bubble generator 100.

(4) Still another example of the gas dissolution tank FIG. 12 is a diagram showing still another example of the gas dissolution tank.

  The gas dissolution tank 930 in FIG. 12 is different from the gas dissolution tank 200 in FIG. 3 in the following points.

  As shown in FIG. 12, in the gas dissolution tank 930 in this example, the bubble rising plate 271 is provided to be inclined toward the ejection nozzle 252 so as to shield between the ejection nozzle 251 and the ejection nozzle 252. . In this case, bubbles generated in the water 701 when the water 701 is ejected from the ejection nozzle 251 can be reliably prevented from reaching the ejection nozzle 252. Accordingly, bubbles can be retained in the water 701 for a sufficient time in the upper space 205, and the bubbles can be reliably prevented from flowing out from the ejection nozzle 252 to the lower space 206. As a result, bubbles can be reliably dissolved in the water 701 in the upper space 205.

  Further, in the gas dissolution tank 930 in this example, a bubble rising plate 272 is provided to be inclined toward the liquid outflow pipe 261 so as to shield between the ejection nozzle 252 and the liquid outflow pipe 261. In this case, it is possible to reliably prevent bubbles generated in the water 701 from reaching the liquid outflow pipe 261 when the water 701 is ejected from the ejection nozzle 252 into the lower space 206. Thereby, in the lower space 206, the bubbles can be retained in the water 701 for a sufficient time, and the bubbles can be reliably prevented from flowing out from the liquid outflow pipe 261. As a result, bubbles can be reliably dissolved in the water 701 in the lower space 206.

(5) Still another example of the gas dissolution tank FIG. 13 is a diagram showing still another example of the gas dissolution tank.

  The gas dissolution tank 940 in FIG. 13 differs from the gas dissolution tank 200 in FIG. 3 in the following points.

  As shown in FIG. 13, in the gas dissolution tank 940 in this example, the upper portion of the bubble rising plate 271 is inclined toward the ejection nozzle 252 so as to shield between the ejection nozzle 251 and the ejection nozzle 252. In this case, bubbles generated in the water 701 when the water 701 is ejected from the ejection nozzle 251 can be reliably prevented from reaching the ejection nozzle 252. Accordingly, bubbles can be retained in the water 701 for a sufficient time in the upper space 205, and the bubbles can be reliably prevented from flowing out from the ejection nozzle 252 to the lower space 206. As a result, bubbles can be reliably dissolved in the water 701 in the upper space 205.

  In the gas dissolution tank 940 in this example, the upper part of the bubble rising plate 272 is inclined toward the liquid outflow pipe 261 so as to shield between the ejection nozzle 252 and the liquid outflow pipe 261. In this case, it is possible to reliably prevent bubbles generated in the water 701 from reaching the liquid outflow pipe 261 when the water 701 is ejected from the ejection nozzle 252 into the lower space 206. Thereby, in the lower space 206, the bubbles can be retained in the water 701 for a sufficient time, and the bubbles can be reliably prevented from flowing out from the liquid outflow pipe 261. As a result, bubbles can be reliably dissolved in the water 701 in the lower space 206.

(6) Still another example of the gas dissolution tank The casing 201 of the gas dissolution tanks 200, 800, 900, 920, 930, and 940 may be separated into a plurality of parts. In this case, since the inside of the housing 201 can be easily cleaned, the reliability of the gas dissolution tanks 200, 800, 900, 920, 930, and 940 can be improved.

  Further, the partition plate 204 or the partition plate 207 may be provided so as to be movable up and down. In this case, the pressure of the water 701 in the upper space 205 and in the partition plate 207 can be adjusted by adjusting the position of the partition plate 204 or the partition plate 207. Thereby, even when the pressure of the water 701 supplied to the gas dissolution tanks 200, 800, 900, 920, 930, and 940 fluctuates and when the pressure of the water 701 is low, the air is stably dissolved in the water 701. Can be made.

(7) Examples of ejection nozzles provided in the gas dissolution tank The shapes of the ejection nozzles 251, 252 and 253 used in the gas dissolution tanks 200, 800, 900, 920, 930 and 940 are shown in FIGS. It is not limited to the shape shown in FIGS. Hereinafter, examples of the shape of the ejection nozzle will be described with reference to the drawings.

  FIG. 14 is a diagram illustrating another shape example of the ejection nozzle. 14A is a perspective view, and FIG. 14B is a bottom view.

  As shown in FIG. 14, the ejection nozzle 254 in this example includes a flange portion 541 and a cylindrical portion 542 provided so as to extend downward from the flange portion 541. Further, the ejection nozzle 254 is formed with a columnar through hole 543 that penetrates the flange portion 541 and the cylindrical portion 542.

  In this ejection nozzle 254, since the through-hole 543 is formed in a columnar shape, the ejection nozzle 254 is easy to manufacture. Thereby, the manufacturing cost of gas dissolution tank 200,800,900,920,930,940 can be reduced.

  FIG. 15 is a diagram showing still another shape example of the ejection nozzle. 15A is a perspective view, and FIG. 15B is a bottom view.

  As shown in FIG. 15, the ejection nozzle 255 in this example has a flange portion 551 and a cylindrical portion 552 provided to extend downward from the flange portion 551. The ejection nozzle 255 is formed with a through hole 553 that penetrates the flange portion 551 and the cylindrical portion 552.

  In this ejection nozzle 255, the cross-sectional shape of the through-hole 533 gradually transitions from an upper circular shape to a lower elliptical shape. In this case, the water 701 is ejected so as to spread over a wide range from the opening at the lower end of the ejection nozzle 255. Thereby, the water 701 can be stirred in a wide area in the upper space 205 and the lower space 206 of FIG. 3, FIG. 9, or FIG. As a result, a sufficient amount of air can be dissolved in the water 701.

  Moreover, since the through-hole 533 is formed in the ejection nozzle 255 so that the cross-sectional area gradually decreases downward, the flow rate of the water 701 ejected from the opening at the lower end of the ejection nozzle 255 is sufficiently increased. be able to. Thereby, the water 701 can be efficiently stirred in the upper space 205 and the lower space 206.

  FIG. 16 is a diagram showing still another shape example of the ejection nozzle. 16A is a perspective view, and FIG. 16B is a bottom view.

  The ejection nozzle 256 in FIG. 16 differs from the ejection nozzle 254 in FIG. 14 in the following points.

  As shown in FIG. 16, in the ejection nozzle 256 in this example, a plurality of through-holes 56 having a rectangular cross section are formed radially on the lower surface of the cylindrical portion 542. In the ejection nozzle 256, the water 701 can be ejected from the plurality of through holes 56 at a high speed. Accordingly, the water 701 can be sufficiently pressurized and stirred in the upper space 205 and the lower space 206. As a result, air can be reliably dissolved in the water 701.

  FIG. 17 is a diagram illustrating still another shape example of the ejection nozzle.

  As shown in FIG. 17, the ejection nozzle 257 in this example includes an inflow pipe 571 and two branch pipes 572 and 573 that branch at the lower end of the inflow pipe 571. In the ejection nozzle 257, the water 701 flowing into the inflow pipe 571 can be ejected from the opening at the lower end of the branch pipe 571 and the opening at the lower end of the branch pipe 572, respectively. Thereby, the water 701 can be efficiently pressurized and stirred in the upper space 205 and the lower space 206. As a result, air can be reliably dissolved in the water 701.

  In the above description, the case where the ejection nozzles are provided in the partition plate 204 and the partition plate 207 has been described. However, a through-hole having a circular cross section or a slit cross section is formed in the partition plate 204 and the partition plate 207. Also good.

<Another configuration example of the bubble generator>
FIG. 18 is a diagram illustrating another configuration example of the bubble generating device.

  The bubble generator 2000 shown in FIG. 18 differs from the bubble generator 1000 of FIG. 1 in the following points.

  As shown in FIG. 18, in the bubble generating device 2000 in this example, the gas dissolution tank 200 and the bathtub 700 are connected by a liquid supply pipe 400. Further, a pump 450 is inserted in the liquid supply pipe 400.

  In the bubble generating apparatus 2000 in this example, the water 701 in the bathtub 700 is supplied to the gas dissolution tank 200 via the liquid circulation pipe 400 when the pump 450 is activated. As described above, air is dissolved in the water 701 in the gas dissolution tank 200.

  The water 701 in which air is dissolved in the gas dissolution tank 200 is supplied to the bubble generator 100 through the liquid circulation pipe 300. As described above, fine bubbles are generated in the water 701 in the bubble generator 100. Thereby, fine bubbles are supplied to the water 701 in the bathtub 700. Therefore, in the bubble generating device 2000 in this example, a sufficient amount of fine bubbles can be generated in the water 701 in the bathtub 700 while circulating the water 701 in the bathtub 700.

  Further, in the bubble generation device 2000 in this example, the gas dissolution tank 200 is disposed above the bubble generator 100. In this case, the water level of the water 701 in the bathtub 700 is lowered below the bubble generator 100, so that the water in the gas dissolution tank 200 is discharged from the bubble generator 100. Therefore, in this example, air can be easily supplied into the gas dissolution tank 200 by discharging the water 701 in the bathtub 700.

  In this example, an air valve 250 is provided in the gas dissolution tank 200. In this case, when the amount of air in the gas dissolution tank 200 decreases during the operation of the bubble generating device 2000, air can be easily supplied into the gas dissolution tank 200 by opening the air valve 250. .

<Another use example of bubble generator>
FIG. 19 is a diagram for explaining another example of use of the bubble generating device. The use example of the bubble generator 1000 shown in FIG. 19 is different from the use example of the bubble generator 1000 of FIG. 1 in the following points.

  As shown in FIG. 19, in this example, the bubble generator 100 is provided between the liquid circulation pipe 300 and the shower head 122. In this example, water supplied from a tap faucet 500 is ejected from the shower head 122 through the gas dissolution tank 200 and the bubble generator 100.

  In this case, since a sufficient amount of fine bubbles are generated in the bubble generator 100, mist-like water is discharged from the shower head 122. Therefore, for example, when the bubble generating device 1000 is provided in the shower head 122 in the bathroom, the shower head 122 in the washstand, the shower head 122 in the kitchen sink, etc., the use of water while improving the water cleaning effect The amount can be reduced.

  In addition, in this example, although the case where the bubble generator 100 was provided between the shower head 122 and the water injection pipe 123 was demonstrated, you may provide the bubble generator 100 so that the water injection pipe 123 may be inserted.

  Further, when the bubble generator 100 is attached to the shower head 122, the bubble stabilizing tube 108 may not be provided.

  In FIG. 19, the case where the shower head 122 is attached to the bubble generator 100 has been described. However, water may be directly ejected from the bubble generator 100 without attaching the shower head 122.

<Correspondence between Each Component in Claim and Each Element in Embodiment>
Hereinafter, although the example of a response | compatibility with each component of a claim and each element of embodiment is demonstrated, this invention is not limited to the following example.

  In the above embodiment, the housing tubes 107 and 607 are examples of the main body, the through hole 31 is an example of the first flow hole, and the bubble generating plates 103, 109, and 603 are examples of the first bubble generating plate. The moving plate 104 is an example of a moving member, the spring 105 is an example of an urging member, the through-hole 63 is an example of a second flow hole, and the fixed plates 106 and 606 generate second bubbles. It is an example of a plate, the spring 105 is an example of a spiral member, the bubble stabilizing tube 108 is an example of a cylindrical member, and the gas dissolution tanks 200, 800, 900, 920, 930, 940 are examples of a gas dissolver. The upper space 205 is an example of the first pressurizing chamber, the lower space 206 is an example of the second pressurizing chamber, the liquid outflow pipe 261 is an example of the liquid outflow portion, and the ejection nozzles 251, 254, 255, 256, 257 are examples of the first ejection part. The ejection nozzles 252, 254, 255, 256, and 257 are examples of the second ejection part, the auxiliary space 921 is an example of the liquid supply space, and the bubble rising plates 271 and 871 are examples of the first change plate. The bubble rising plates 272 and 872 are examples of the second change plate.

  As each constituent element in the claims, various other elements having configurations or functions described in the claims can be used.

  The present invention can be effectively used for various bubble generators and bubble generators.

It is a figure which shows an example of the bubble generator which concerns on the 1st Embodiment of this invention, and a bubble generator provided with the same. It is an external appearance perspective view which shows a gas dissolution tank. It is a schematic sectional drawing which shows a gas dissolution tank. It is an assembly perspective view of the bubble generator of FIG. It is a longitudinal cross-sectional view of the bubble generator of FIG. It is a figure which shows the other example of a bubble generation plate. It is an assembly perspective view of the bubble generator concerning a 2nd embodiment. It is a longitudinal cross-sectional view of the bubble generator which concerns on 2nd Embodiment. It is sectional drawing which shows the other example of a gas dissolution tank. It is sectional drawing which shows the further another example of a gas dissolution tank. It is sectional drawing which shows the further another example of a gas dissolution tank. It is sectional drawing which shows the further another example of a gas dissolution tank. It is sectional drawing which shows the further another example of a gas dissolution tank. It is a figure which shows the other example of a shape of an ejection nozzle. It is a figure which shows the further another example of a shape of an ejection nozzle. It is a figure which shows the further another example of a shape of an ejection nozzle. It is a figure which shows the further another example of a shape of an ejection nozzle. It is a figure which shows the other structural example of a bubble generator. It is a figure for demonstrating the other usage example of a bubble generator.

Explanation of symbols

31,63 Through hole 100,600 Bubble generator 103,109,603 Bubble generation plate 104 Moving plate 105 Spring 106,606 Fixed plate 107,607 Housing pipe 108 Bubble stabilization pipe 200,800,900,920,930,940 Gas Dissolution tank 205 Upper space 206 Lower space 250 Air valve 251, 252, 253, 254, 255, 256, 257 Jet nozzle 261 Liquid outflow pipe 271, 272, 871, 872 Bubble rising plate 1000, 2000 Bubble generator

Claims (9)

A bubble generator for generating bubbles in a liquid,
A cylindrical main body having an inlet through which liquid flows in and an outlet through which liquid flows out;
A first bubble generating plate that is provided so as to partition the upstream space and the downstream space in the main body, and has a first flow hole for guiding liquid from the upstream space to the downstream space;
A moving member provided to be movable in the axial direction of the main body in the downstream space of the main body,
A biasing member that biases the moving member toward the upstream side in the axial direction,
The cross-sectional area of the first flow hole is smaller than the area of the inlet,
The air bubble generator, wherein the moving member has a surface facing the first flow hole. The bubble generator according to claim 1, wherein the biasing member is a coil spring. A second bubble generating plate provided on the downstream side of the moving member in the main body and having a second flow hole for guiding liquid from the moving member side to the outlet side;
The bubble generator according to claim 1 or 2, wherein a cross-sectional area of the second flow hole is smaller than an area of the inlet. The first flow hole is bubble generator according to any one of claims 1 to 3, characterized in that it has a cross section enlarged discontinuously from the upstream side to the downstream side. The first flow hole is bubble generator according to any one of claims 1 to 4, characterized in that it has a circular cross-section. The first flow hole is bubble generator according to any one of claims 1 to 4, characterized in that a slit-shaped cross-section. It said first bubble generating plate, bubble generator according to any one of claims 1 to 6, characterized in that it has a plurality of the first flow hole. The bubble generator according to any one of claims 1 to 7 , further comprising a cylindrical member provided at a downstream end of the main body. A gas dissolver for dissolving the gas in the liquid;
Bubble generating device being characterized in that a bubble generator according to any one of claims 1 to 8 for being connected to the gas dissolver generate fine bubbles in the liquid supplied from the gas dissolver.

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