JP2007296430A - Apparatus for generating air bubble and system for generating air bubble provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for generating bubbles, capable of sufficiently generating minute bubbles to fill a liquid storage vessel when a gas-liquid fluid mixed with a gas is jetted in the vessel. <P>SOLUTION: A gas-liquid fluid jetting means for jetting the gas-liquid fluid to the liquid storage vessel such as a bath tub comprises a nozzle member having a flow-in port and a flow-out port. The nozzle member is provided with a pressure reduced hollow part communicating with the flow-in port, and a barrier which allows the gas-liquid jet stream from the flow-in port to collide therewith is provided in the pressure reduced hollow part. The flow-out port having an opening area equal to or larger that of the flow-in port is arranged in the pressure reduced hollow part. As a result, the gas-liquid fluid supplied to the flow-in port is diffused in the pressure reduced part and at the same time, collides with the barrier to weaken the flow rate and after that, flows into the liquid storage vessel from the flow-out port. The minute bubbles are generated by diffusing the gas-liquid fluid in the pressure reduced hollow part and colliding with the barrier and are further generated when the gas-liquid having weakened flow rate flows out from the flow-out port and the liquid storage vessel can be filled with the minute bubbles in a short time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bubble generating device for generating bubbles in a liquid storage tank such as a cleaning tank or a bathtub, and a bubble generating system provided with the same, and more particularly, a fluid pump for cleaning or liquid such as hot water or cleaning water in a bathtub. The present invention relates to a bubble generating device that generates bubbles such as air when circulating in the air to enhance a warm bath effect or a cleaning effect.

  Generally, a device that generates bubbles simultaneously with circulating a cleaning liquid, warm bath water, etc. in a liquid storage tank such as a cleaning tank or a bathtub is widely used. In such an apparatus, it is considered that fine bubbles have a higher cleaning effect or warm bath effect than fine bubbles because they tend to enter the details of an object. In particular, in the bathtub system, when fine bubbles are generated in the tank during the circulation of warm bath water, the fine bubbles penetrate into the skin and the effect of warm bath is high, and the effect of negative ions is also expected.

  Conventionally, as such a bubble generating device, as disclosed in Patent Document 1, air is mixed from an air pump when the fluid in the tank is pumped from the inlet by a pressure pump, and this is further pressurized by an accumulator. Then, a liquid flow containing bubbles (mainly coarse bubbles) is returned from the nozzle as a jet jet into the tank. As the pressurizing pump, a continuous liquid flow is formed mainly using a rotary pump. When coarse bubbles are generated in the liquid storage tank by such a bubble jet method, a jet flow may be jetted onto an object (cleaned object or human body) in the liquid storage tank, which may damage the cleaned object or cause discomfort to the human body.

  Thus, for example, Patent Document 2 proposes an apparatus in which a convection portion is provided at the tip of a nozzle in order to generate fine bubbles quietly without forming a jet jet in a bathtub or cleaning tank. This document 2 discloses a device that convects and mixes fluid mixed with gas (air) in a mixing tank and generates fine bubbles when this gas-liquid fluid is ejected from a nozzle.

Similarly, Patent Document 3 proposes a valve structure shown in FIG. 8A as a nozzle structure for generating fine bubbles in a liquid storage tank. As shown in FIG. 8 (a), the nozzle structure of this document is provided with a valve seat 151 at the outlet end of the flow path 150 of circulating water mixed with bubbles, and a valve body 152 is disposed at a position facing the valve seat. For example, the inner wall on the valve seat side is formed in a conical shape, and the valve body 152 is configured in a conical shape so as to be fitted to the inner wall. Then, the valve body 151 is fixed to the gap adjusting screwing portion 153 to form a fixed gap between the valve body and the valve seat, and the screwing portion 153 adjusts the gap amount. Although not shown as a similar nozzle structure, it is also known that the outlet has an orifice valve structure. When a gas-liquid fluid containing a gas such as air is ejected from a nozzle having such a structure under high pressure, fine bubbles are generated. In order to generate such fine bubbles, diffusion through the nozzle simultaneously with the pressure difference ejected from the gap is an element that generates a large amount of bubbles.
Japanese Patent No. 2663538 (FIG. 1) Japanese Patent Laying-Open No. 2003-265938 (FIG. 3) Japanese Patent Laying-Open No. 2002-85949 (FIG. 5)

  When bubbles are generated in a liquid storage tank such as a bathtub or a washing tank as described above, if bubbles are generated by a jet jet that vigorously jets out a liquid in which bubbles are mixed as described in Patent Document 1, the bubbles are jetted into the tank. Is generated, fine bubbles are destroyed, and on the contrary, coarse bubbles are generated. Moreover, since a strong jet is formed in the tank, there is a problem that the washing object is damaged or the human body is uncomfortable. In view of this, an apparatus for quietly generating fine bubbles without forming a jet jet in the tank as described in Patent Document 2 has been proposed. For example, in the case of a hot tub, if the microbubbles are filled in the tank, it penetrates into the body, and the effect of negative ions is expected at the same time as improving the warm bath effect. In this case, if the nozzle structure for generating fine bubbles is ejected from a gap formed around the conical nozzle valve as in Patent Document 3, the amount of fine bubbles generated in the tank is small. That is, even if sufficient gas is mixed in the liquid circulation path, sufficient fine bubbles cannot be generated in the nozzle portion that supplies the gas into the tank.

  Therefore, the present inventor diffuses the gas-liquid fluid into the tank so as to form a turbulent flow from the nozzle outlet, and in a process where a turbulent flow such as a vortex is formed when ejected at a relatively low flow velocity. It came to investigate that a bubble is produced | generated. On the other hand, in the conventional nozzle valve structure, if the gap is increased, the gas-liquid fluid flows into the tank in a laminar state, and conversely, if the gap is decreased, the liquid flows into the tank at a high flow rate. Turned out not to be generated.

  The main object of the present invention is to provide a bubble generating device capable of generating sufficient fine bubbles when a gas-liquid fluid mixed with gas is ejected in a storage tank and filling the tank. Another object of the present invention is to provide a fine bubble generating system capable of filling a sufficient amount of fine bubbles within a short time when circulating a liquid in a liquid storage tank such as a bathtub.

  To achieve the above object, the present invention employs the following configuration. Gas-liquid fluid ejecting means for ejecting gas-liquid fluid to a liquid storage tank such as a bathtub is constituted by a nozzle member having an inlet and an outlet. The nozzle member is provided with a decompression cavity portion connected to the inlet, and a barrier for colliding the gas-liquid jet from the inlet is provided in the decompression cavity portion. Then, an outlet having a diameter area equal to or larger than that of the inlet is provided in the decompression cavity. As a result, the gas-liquid mixed fluid supplied to the inflow port is diffused in the decompression cavity portion, and at the same time, collides with the impingement wall to reduce its flow velocity, and then flows into the liquid storage tank from the outflow port. Accordingly, when the gas-liquid fluid is diffused in the decompression cavity and collides with the barrier, fine bubbles are generated. Then, when the flow velocity is weakened from the discharge port, fine bubbles are further generated. As described above, it is possible to sufficiently generate fine bubbles at the peripheral portion of the nozzle member and fill the liquid storage tank in a short time.

  In addition, the nozzle member described above is formed of a hollow cylindrical body having an inlet at the base end, and a pressure reducing cavity is formed by providing a sealing body at the distal end opening of the hollow cylindrical body. The body forms a barrier against which the gas-liquid fluid from the inlet is abutted. And the said outflow port is formed in the side wall of a pressure reduction cavity part. When configured in this manner, the gas-liquid fluid from the inlet contacts the impingement wall and is decelerated, generating fine bubbles when forming a turbulent flow such as a vortex in the decompression cavity, and flows out from the side wall into the liquid storage tank In some cases, a turbulent flow is formed to generate fine bubbles, and the liquid bubbles can be filled in the liquid tank in a short time.

  Further, the barrier is arranged on the front end side in the inflow direction at a position facing the inlet in the decompression cavity. And the said outflow port is provided in the side wall direction which cross | intersects an inflow direction, for example, orthogonally crosses. With this configuration, the gas-liquid fluid from the inflow port linearly collides with the barrier from the inflow port, is reflected, diffuses in a turbulent state in the decompression cavity, and flows out in a direction crossing the inflow direction. Therefore, fine bubbles are generated in the decompression cavity, and fine bubbles are also generated when the liquid flows out from the outlet into the liquid storage tank, and the liquid storage tank is filled. When a plurality of outlets are provided on the peripheral side wall of the nozzle member, the total aperture area of the outlet is formed to be equal to or larger than the aperture area of the inlet.

  Further, the liquid supply pump means includes a plurality of pump means including a primary side pump for sucking liquid from the liquid introduction pipe and a secondary side pump for discharging liquid to the liquid supply path, and the gas supply pump is configured to be the secondary side pump. A high pressure gas is supplied to the suction port of the pump. By configuring in this way, a gas such as air is mixed in a path for feeding liquid from the primary pump to the secondary pump in a relatively low pressure state, and the gas and liquid are mixed when pressurized by the secondary pump. Since the mixture is compressed, a sufficient gas can be mixed in the liquid, and the gas supply pump can be constituted by a small-sized and small-capacity pump device.

  Next, a bubble generating system according to the present invention includes a liquid storage tank such as a tub for storing liquid, liquid supply pump means having a liquid suction port and a discharge port, and liquid from the liquid storage tank to the suction port. A liquid circulation pipe that circulates and supplies liquid, a liquid feed pipe that feeds liquid from the discharge port to the liquid storage tank, and a gas supply pump that mixes high-pressure air into the liquid from the suction port to the discharge port; Is provided. The liquid supply pump means includes a primary pump that sucks liquid from the liquid introduction pipe and a secondary pump that discharges liquid to the liquid supply pipe, and the gas supply pump is connected to the secondary pump. Connect so that high-pressure air is mixed into the inlet.

  Therefore, gas-liquid fluid ejecting means for ejecting gas-liquid fluid from the liquid supply pipe is constituted by a nozzle member having an inlet and an outlet, and the nozzle member includes a decompression cavity portion connected to the inlet, and the decompression A barrier for colliding the gas-liquid jet from the inlet is provided in the cavity. The decompression cavity is provided with an outlet having a diameter area equal to or larger than the diameter area of the inlet. This makes it possible to fill the liquid tank with fine bubbles in the process of circulating warm bath water such as a bathtub.

  In the present invention, when a liquid such as air is mixed in a liquid from a liquid supply pump in a process of supplying or circulating a liquid to a liquid storage tank such as a bathtub, and the gas-liquid fluid is ejected into the liquid storage tank by a nozzle member. The microbubbles are generated by colliding with the impingement wall in the decompression cavity and diffusing in a turbulent state such as vortex, and then the fluid containing the microbubbles is also diffused when flowing out from the jet port into the tank. Further, since the fine bubbles are generated, the fine bubbles can be filled in the liquid storage tank in a short time. That is, when a liquid mixed with gas in a high-pressure state is ejected from the nozzle member to generate fine bubbles, the liquid is first diffused in the decompression cavity, and then the gas-liquid fluid collides with the barrier and scatters. By decelerating the liquid fluid at the barrier and discharging it in a turbulent state from the outlet, more fine bubbles can be generated. In the case of the washing tank, the fine bubbles generated and filled in the liquid storage tank penetrate into the inside of the object to improve the cleaning effect. It is generated and the effect can be expected.

  The present invention will be described in detail below based on the preferred embodiments shown in the drawings. FIG. 1 is a system configuration diagram showing a bubble generating apparatus according to the present invention, and FIGS. 2 (a) and 2 (b) are explanatory diagrams showing the structure of gas-liquid fluid ejecting means in the system. FIG. 3 is an explanatory view showing the structure of the fluid supply pump. FIG. 4 shows an enlarged view of a main part of a mixing tank and a bubble generating device for mixing bubbles and circulating liquid.

  First, as shown in FIG. 1, a bubble generating apparatus A according to the present invention includes a liquid storage tank B such as a bathtub, a liquid supply pump means P for supplying a liquid such as bath water to the liquid storage tank B, and the liquid. A gas supply pump PU3 for mixing a gas such as air into the liquid from the supply pump means P, a liquid supply path (gas-liquid supply pipe) 4 for supplying gas-liquid fluid to the liquid storage tank B, and this gas-liquid supply pipe 4 and a gas-liquid fluid supply pipe 6 for jetting the gas-liquid fluid from 4 into the liquid storage tank B. The bubble generating device A is configured as a circulation system that mixes high-pressure gas such as air in the process of circulating the liquid in the liquid storage tank B, or in the process of supplying a new liquid into the liquid storage tank B. The gas-liquid fluid supply system is mixed.

  The system shown in FIG. 1 is composed of a primary pump PU1 and a secondary pump PU2 in which liquid supply pump means P are connected in series, and the liquid pressurized by the primary pump PU1 is fed to the secondary pump PU2 through the communication pipe 2, The pressure is further increased by the secondary pump PU2 and fed to the gas-liquid supply pipe 4. A gas introduction pipe 3 from an air pump (gas supply pump) PU3 is connected to the communication pipe 2, and the gas from the air pump PU3 is mixed into the fluid whose pressure has been increased by the primary pump PU1, and both are connected to the secondary pump PU2. Then, the pressure is further increased and the gas-liquid supply pipe 4 is carried out. The gas-liquid fluid from the gas-liquid supply pipe 4 is guided to the mixing tank 5 where the gas and the fluid are further mixed. In this way, the liquid supply pump means P is constituted by the primary pump PU1 and the secondary pump PU2, and the high pressure gas from the air pump PU3 is connected to the communication pipe 2 that connects the discharge port of the primary pump PU1 and the suction port of the secondary pump PU2. The reason for introducing the gas is to introduce a high-pressure gas into the primary pump liquid having a relatively low pressure, thereby increasing the amount of mixed gas and simultaneously mixing them in the secondary pump PU2. The structure of the liquid supply pump means P will be described later.

  The gas-liquid fluid from the secondary pump PU2 is guided from the gas-liquid supply pipe 4 to the mixing tank 5, and the gas and liquid are completely mixed in the mixing tank 5. The illustrated mixing tank 5 is composed of a tank having an appropriate volume in which the gas and liquid are stirred by convection, and a gas-liquid fluid discharge pipe 6 is connected to the discharge port. A gas-liquid fluid ejecting means 7 is connected to the tip of the gas-liquid fluid carry-out pipe 6, and the gas-liquid fluid ejecting means 7 is disposed in the liquid storage tank B. The gas-liquid fluid ejecting means 7 is constituted by a hollow cylindrical nozzle member 70 shown in FIG. 2, and an inflow port 71 and a decompression cavity 72 connected to the inflow port 71 are provided at the base end. The diameter D2 of the decompression cavity 72 is configured to be larger than the diameter D1 of the inflow port 71. Similarly, the diameter D3 of the outflow port 73 is provided so as to be larger than the diameter D1 of the inflow port 71. Has a relationship of D1 <D2, D1 <D3.

  For this reason, the gas-liquid fluid is diffused when flowing from the inlet 71 into the decompression cavity 72. Further, a sealing body 74 is provided at the tip of the nozzle member 70 that forms the decompression cavity 72, and the sealing body 74 includes a barrier wall 74 a on which gas-liquid fluid from the inlet 71 collides. In the illustrated example, the sealing body 74 is constituted by a spherical ball, and the barrier wall 74 a formed on the surface of the sealing body 74 has a curved shape protruding toward the inflow port 71. And the outflow port 73 is comprised by the above-mentioned aperture in the side wall of this nozzle member 70. FIG. The positional relationship between the abutment wall 74a and the outlet 73 will be described. As shown in FIG. 2 (b), the abutment wall 74a is arranged at the tip of the inflow direction of the gas-liquid fluid (arrow a) as shown in FIG. The outlet 73 is provided on the peripheral side wall of the nozzle member 70 in a direction (arrow view b) orthogonal to the inflow direction of the gas-liquid fluid upstream of the barrier wall 74a.

  Accordingly, the gas-liquid fluid from the inlet 71 flows in the direction of arrow a from the inlet 71 at a speed corresponding to the pressure difference between the gas-liquid fluid carry-out pipe 6 and the decompression cavity 72 and collides with the abutment wall 74a. Reflects in the c direction. At this time, since the barrier 74a protrudes in a spherical shape, the gas-liquid fluid diffuses radially, and fine bubbles are generated at this time. The gas-liquid fluid containing fine bubbles filled in the decompression cavity 72 flows out from the outlet 73 into the storage tank B. At this time, since the gas-liquid fluid collides with the abutment wall 74a and is decelerated first, the gas-liquid fluid flows out from the outlet 73 into the storage tank B in a turbulent state such as vortex. Fine bubbles are generated. In other words, as shown in FIG. 8B, in the conventional nozzle structure, when the gas-liquid fluid flows out from the outlet, if the illustrated velocity V is large, it flows into the tank as a laminar flow and diffuses at this outlet. Fine bubbles are not generated. In contrast, the outflow port 73 having the above-described configuration flows out from the direction perpendicular to the velocity direction, in which the gas-liquid fluid is not affected by the inflow velocity V, and the velocity is the pressure of the decompression cavity 72 and the storage tank B. Since it flows out at a speed corresponding to the difference, a vortex is easily generated, and fine bubbles are generated in the process of generating the vortex, and the tank is filled with smoke.

  Next, FIG. 3 shows a specific configuration of the bubble generation system, and the structure thereof will be described below. As shown in FIG. 3, a liquid supply pump (the aforementioned liquid supply pump means P) 25 that supplies the liquid L into the casing 20 that has been subjected to soundproofing, and an air pump (the aforementioned gas supply pump PU3) 50 for supplying gas. And the mixing tank 5 is incorporated. The liquid supply pump 25 includes a suction port 26, a discharge port 27, a cylinder chamber S, and a piston member PI, and the fluid introduction pipe 1 is connected to the suction port 26. In the figure, the fluid introduction pipe 1 is connected to a liquid storage tank B to constitute a system for circulating the liquid in the liquid storage tank. Although the liquid supply pump 25 will be described in detail later, the liquid supply pump 25 is constituted by a reciprocating pump in which the piston member PI reciprocates in the cylinder chamber. The liquid supply pump 25 is composed of primary and secondary reciprocating pumps for miniaturization and high pressure. The liquid introduced from the fluid introduction pipe 1 is pressurized by the primary pump 25a and discharged from the primary pump 25a. A liquid whose pressure is increased by further compressing the fluid with the secondary pump 25 b is supplied to the mixing tank 5 via the gas-liquid supply pipe 4. That is, the discharge port 27 of the primary pump 25a is connected to the suction port 29 of the secondary pump 25b by the communication pipe 2.

  An air pump 50 is connected to the communication pipe 2, and high-pressure gas is mixed from the air pump 50 into the liquid pressurized by the primary pump 25 a. The illustrated air pump 50 has the same structure as the previous liquid supply pump 25, and is composed of a primary pump 50a and a secondary pump 50b in order to reduce the size and pressure, and sucks outside air from the suction port 51 of the primary pump 50a. The discharge pipe 55 of the secondary pump 50b is connected to the communication pipe 2 that connects the primary pump 25a and the secondary pump 25b of the liquid supply pump 25 with the gas introduction pipe 3. The reason why the gas introduction pipe 3 is connected to the communication pipe 2 from the primary pump 25a of the liquid supply pump 25 and the air is supplied in this way is that the air is supplied to the gas-liquid supply pipe 4 which is an output pipe of the secondary pump 25b. This is to reduce the load of the air pump as compared with the case of doing so. Therefore, the gas introduction pipe 3 may be connected to the gas-liquid supply pipe 4 when the air pump 50 is not required to be downsized.

  Both the liquid supply pump 25 and the air pump 50 are composed of primary pumps 25a and 50a and secondary pumps 25b and 50b. First, the liquid supply pump 25 is composed of a primary pump 25a and a secondary pump having substantially the same structure. The pump 25b includes cylinder chambers S1 and S2 and piston members PI1 and PI2. Each piston member PI1 and PI2 performs a reciprocal supply / discharge operation by the driving means D. The drive means D has a first cylinder chamber S1 and a second cylinder chamber S2 arranged at positions opposed to each other by 180 degrees around an eccentric cam 16 supported by a drive rotary shaft 15 connected to a drive motor M. Piston members PI 1 and PI 2 mounted on S 1 and S 2 are attached to the eccentric cam 16. When the first piston member PI1 is at the top dead center, the second piston member PI2 is connected to the eccentric cam 16 so as to be positioned at the bottom dead center, and reciprocally feeds and discharges.

  Therefore, a suction valve 26a is arranged at the suction port 26 of the primary pump 25a with a check valve structure, and liquid is sucked from the fluid introduction pipe 1 connected to the suction port 26 and supplied to the first cylinder chamber S1. Further, a discharge valve 27a is arranged in the normal check valve structure at the discharge port 27 of the first cylinder chamber S1, and the liquid compressed in the first cylinder chamber S1 is discharged from the discharge port 27. The discharge port 27 on the primary pump 25a side is connected to the suction port 29 on the secondary pump 25b side by the communication pipe 2, and supplies the fluid discharged from the first cylinder chamber S1 to the second cylinder chamber S2. Also in the second cylinder chamber S2, a suction valve 29a is disposed in the suction port 29, and a discharge valve 30a is disposed in the discharge port 30 with a normal check valve structure. With such a configuration, the liquid sucked from the suction port 26 of the primary pump 25a is discharged as a high-pressure fluid from the discharge port 30 of the secondary pump 25b.

  The above-described air pump 50 is also composed of a primary pump 50a and a secondary pump 50b for miniaturization and high pressure, and air is sucked from the suction port 51 of the primary pump 50a through the check valve 51a, and the first cylinder chamber In step S3, the compressed air is supplied from the discharge port 52 to the second cylinder chamber S4 of the secondary pump 50b through the communication pipe 53. A discharge valve 52a is disposed in the discharge port 52, and a suction valve 54a is disposed in the suction port 54 of the secondary pump 50b with a normal check valve structure. The discharge port 55 of the secondary pump 50b is connected to the discharge valve 55a via the discharge valve 55a. Then, the high pressure air is sent to the gas introduction pipe 3.

  The gas-liquid supply pipe 4 connected to the discharge port 30 of the liquid supply pump 25 is connected to the mixing tank 5. The mixing tank 5 is composed of a tank chamber 5a for storing liquid, and is configured to generate bubbles by mixing the liquid and gas supplied from the gas-liquid supply pipe 4. The mixing tank 5 includes bubble separation means 57 for separating and removing bubbles generated inside by any one of the following means.

  The first bubble sorting means 57 is a partition wall 57a, which is constituted by a dividing wall that substantially divides the tank chamber 5a into two parts, and the gas-liquid flow of the gas-liquid inlet 4a of the gas-liquid supply pipe 4 and the gas-liquid fluid carry-out pipe 6 The outlet 6a is divided by a partition wall 57a. As a result, the bubbles generated in the mixing tank 5 float above the tank chamber 5a, and the bubbles generated in the tank chamber 5a are not guided to the gas-liquid outlet 6a.

  The second bubble separation means 57 arranges the gas-liquid inlet 4a of the gas-liquid supply pipe 4 above the gravity direction, and arranges the gas-liquid outlet 6a of the gas-liquid fluid discharge pipe 6 below. A height difference H (57b in the drawing) is formed between the inlet 4a and the gas-liquid outlet 6a. As a result, the bubbles generated in the tank chamber 5a rise upward and are not guided to the gas-liquid fluid carry-out pipe 6.

The third bubble separation means 57 is a mesh filter 57c, and a mesh filter 57c is provided around the gas-liquid outlet 6a of the gas-liquid fluid carry-out pipe 6, and the mesh of the mesh filter 57c is generated in the tank chamber 5a. It is formed in the size which removes. Any one of the first to third bubble sorting means 57 described above may be disposed in the tank chamber 5a, or the first, second, and third configurations may be provided as illustrated. good.

  In addition, 58 shown in the figure is a drain pipe (excessive bubble carrying-out pipe), and bubbles that are generated in the tank chamber 5a and overflow are carried out from the outlet 58a to the outside. The outlet 58a is provided with a float valve (not shown). When the float reaches a predetermined water level, the outlet 58a is closed. When the float is below a predetermined amount of water, the outlet 58a is opened to remove bubbles generated in the mixing tank. It is carried out from 58 to the drain tray 60. When the inside of the mixing tank exceeds a predetermined amount of water, the float valve closes the outflow port 58a to prevent the liquid in the mixing tank from leaking outside. On the other hand, a drain tray 60 is provided at the bottom of the casing 20. Air bubbles are carried out to the drain tray 60, and water droplets discharged to the drain tray 60 are sucked into the suction port 51 of the air pump 50 simultaneously with outside air. It is like that.

  As a result, excess water generated in the bubble generating device A is sucked together with the outside air from the air pump 50 and circulated to the mixing tank 5. The drain tray 60 is provided with a porous member 61 such as a sponge, and excess water is evaporated by the porous member 61. In other words, in order to remove coarse bubbles generated in the mixing tank 5 in the bubble generating device A, liquid flows out from a damper tank that attenuates vibration of the fluid introduction pipe 1 and discharge of excess bubbles. Without arranging a drain pipe and carrying it out, it accumulates in the drain tray 60 and promotes vaporization, and is led from the drain tray 60 to the suction port 51 of the air pump 50 and circulates to the mixing tank 5. It has become.

  In the bubble generating device A configured as described above, liquid such as washing water and bath water is supplied from the fluid introduction pipe 1 to the cylinder chambers S1 and S2 of the primary pump 25a through the suction valve 26a by a pump operation described later. Pressurized by the secondary pump 25 b and sent to the gas-liquid supply pipe 4. High-pressure air is mixed from the air pump 50 between the primary pump 25a and the secondary pump 25b, and gas (air) is dissolved in the liquid (cleaning liquid, bath water, etc.) in the gas-liquid supply pipe 4. It is supplied to the mixing tank 5. Bubbles generated in the mixing tank 5 are selected as described above, and the mixed fluid of the gas and liquid is sent to the gas-liquid fluid carry-out pipe 6.

  Therefore, the present invention is configured as follows with the gas-liquid fluid ejecting means 7 attached to the tip of the gas-liquid fluid carry-out pipe 6 and ejecting so as to fill the liquid storage tank B with fine bubbles. The gas-liquid fluid ejecting means 7 includes a hollow cylindrical nozzle member 70, a gas-liquid fluid outflow path 75 that is integrally formed with the nozzle member 70 and guides the gas-liquid from the gas-liquid fluid carry-out pipe 6, and the outflow path. And a sealing body (spherical valve) 74 arranged at 75. The nozzle member 70 is formed with an inlet 71 at the tip, and the gas-liquid fluid outlet 75 is formed at the nozzle base, and the diameter D3 of the outlet 73 and the diameter of the gas-liquid fluid outlet 75 are formed. D1 has a relationship of D1 <D3. The other configuration is as described with reference to FIG.

  Next, the configuration of the liquid supply pump 25 and the air pump 50 will be described in detail with reference to FIGS. 5 and 6 show the structure of a pump that sends air or liquid to the discharge section by means of a cylinder chamber S and a piston member PI that reciprocally moves in the cylinder chamber. The illustrated one includes a pair of pump heads 24a and 24b and a driving means D for driving the piston members PI. The pump heads 24a and 24b have the same structure, and the discharge chambers 62a and 6b, the cylinder chambers S1 (S3) and S2 (S4) into which fluid flows into the discharge chambers 62a and 62b, and the piston members PI1 (PI3) and PI2 ( PI4). Since the structure is the same, one of them will be described below.

  The illustrated cylinder chambers S3 and S4 are formed by hollow cylindrical openings respectively drilled in an upper frame 65 and a lower frame 66 attached between the front frame 63 and the rear frame 64. A pump head 24a having a discharge chamber 62a is connected to the cylinder chamber S1, and a suction port 51 and a discharge port 52 through which outside air flows are provided in the cylinder chamber S3, and the suction port 51 is reciprocated by the piston member PI3. The outside air flows in from the discharge port 52 and is sent from the discharge port 52 to the discharge chamber 62b. The discharge port 52 is provided with a pressure adjusting screw. A discharge port 55 having a check valve (discharge valve) 55a is provided.

  Therefore, piston members PI3 and PI4 are fitted in the cylinder chambers S3 and S4 so as to be able to reciprocate. The piston members PI3 and PI4 are driven by the eccentric cam 16. The eccentric cam 16 is composed of two eccentric rotating bodies 16a and 16b fixed (for example, press-fitted) to the rotating shaft 15 supported by bearings between the front frame 63 and the rear frame 64, and the eccentric rotating bodies 16a and 16b. As shown in FIG. 5, they are arranged so as to be symmetrical at positions separated by 180 degrees with respect to the axial center so that the eccentric rotating body 16a reciprocates the piston member PI3 and the eccentric rotating body 16b reciprocates the piston member PI4. It is connected.

  An annular ring 124a is connected to the one eccentric rotating body 16a, and a ring 124b is connected to the other eccentric rotating body 16b via a bearing. A rod portion of the piston member PI3 is connected to the ring 124a, and a rod portion of the piston member PI4 is connected to the ring 124b. In particular, the rings 124a and 124b can be adjusted in the radial mounting positions by the fixing screws 124c shown in FIG. 6 on the eccentric rotating bodies 16a and 16b. As a result, the occurrence of vibration due to a dimensional error during manufacturing of the rotating body or an error in the positional relationship with the cylinder chamber can be eliminated by adjusting the mounting position of the ring.

  The cylinder chambers S3 and S4 and the piston members PI3 and PI4 fitted to the cylinder chambers S3 and S4 are arranged so as to face each other at positions separated by 180 degrees around the rotation shaft 15, and the suction and discharge processes of the piston members PI3 and PI4 are performed. Are the same. That is, when the eccentric rotator 16a positions the piston member PI3 at the top dead center, the eccentric rotator 16b positions the piston member PI4 at the top dead center. This is because the loads (drags) generated in the two pistons in the process of sucking and discharging the fluid are canceled by each other, and the vibrations are reduced. Therefore, the suction and discharge processes of the two pistons are only required to be substantially the same, and the direction in which the two pistons are disposed may be substantially opposed on a straight line.

  If the cylinder chamber S is provided at three positions around the rotary shaft 15, it is disposed at a position 120 degrees apart. Similarly, if it is provided at four positions at a position 90 degrees apart, a plurality of pistons are formed in the intake / exhaust process. Each load applied to the rotating shaft 15 is canceled out. At the same time, the eccentric rotators 16a and 16b corresponding to the plurality of pistons also have a phase difference by a predetermined angle around the rotation shaft 15, and each acts as another balancer and generates a large vibration. There is no.

The system block diagram which shows the whole structure of the bubble generator concerning this invention. FIG. 2 is a structural explanatory view showing a configuration of gas-liquid fluid ejecting means in the apparatus of FIG. 1, (a) is a cross-sectional explanatory view, and (b) is an explanatory view showing a flow of ejected fluid. Explanatory drawing which shows the detail of the liquid supply pump and air pump in the apparatus of FIG. FIG. 4 is an enlarged configuration diagram of a main part of the apparatus of FIG. The front view which shows the structure of the liquid supply pump and gas supply pump in the apparatus of FIG. Sectional drawing which shows the structure of the liquid supply pump and gas supply pump in the apparatus of FIG. Explanatory drawing which shows the internal structure of the mixing tank in the apparatus of FIG. The structure of the bubble fluid ejection nozzle in the conventional bubble generator is shown, (a) is sectional explanatory drawing, (b) is explanatory drawing which shows the flow of the fluid ejected.

Explanation of symbols

A Bubble generator B Liquid storage tank P Liquid supply pump means PU1 Primary pump PU2 Secondary pump PU3 Gas supply pump PI Piston member S Cylinder chamber 1 Fluid introduction pipe 2 Communication pipe 3 Gas introduction pipe 4 Gas-liquid supply pipe (liquid supply path) )
5 Mixing tank 6 Gas-liquid fluid discharge pipe 7 Gas-liquid fluid injection means 25 Liquid supply pump 25a Primary pump 25b Secondary pump 26 Suction port 27 Suction port 50 Air pump 50a Primary pump 50b Secondary pump 51 Suction port 55 Suction port 70 Nozzle Member 71 Inlet 72 Depressurized cavity 73 Outlet 74 Sealed body (spherical valve)
74a Wall 75 Gas-liquid fluid outflow passage

Claims (6)

A storage tank such as a bathtub for storing liquid;
Liquid supply pump means for supplying water or other liquid to the liquid storage tank;
A liquid supply path from the liquid supply pump means to the liquid storage tank;
A gas supply pump for mixing air or other gas into the liquid in the liquid supply path;
A gas-liquid fluid ejecting means for ejecting gas-liquid fluid from the liquid supply path,
The gas-liquid fluid ejecting means includes a nozzle member having an inlet and an outlet,
The nozzle member is provided with a decompression cavity portion continuous with the inlet, and a barrier for colliding the gas-liquid jet from the inlet into the decompression cavity portion,
A bubble generating device characterized in that an outlet having a diameter area equal to or larger than the diameter of the inlet is provided in the decompression cavity. The nozzle member is composed of a hollow cylindrical body having an inlet at a proximal end and an outlet at a distal end,
A ball or other sealing body is provided at the tip of the hollow cylindrical body to form the decompression cavity and the barrier is formed from the sealing body.
The bubble generating device according to claim 1, wherein the outlet is formed on a side wall of the decompression cavity. The abutment wall is disposed on the front end side in the inflow direction facing the inlet in the decompression cavity,
The bubble generating device according to claim 1, wherein the outlet is disposed on a side wall intersecting the inflow direction. A plurality of outlets are provided on the peripheral side wall of the nozzle member;
The bubble generating device according to claim 2 or 3, wherein a total aperture area of the outlet is formed to be equal to or larger than a diameter area of the inlet. The liquid supply pump means is constituted by a plurality of pump means including a primary side pump for sucking liquid from a liquid introduction pipe and a secondary side pump for discharging liquid to the liquid supply path.
5. The bubble generating device according to claim 1, wherein the gas supply pump is configured to supply high-pressure gas to an inlet of the secondary pump. A bubble generation system that circulates a liquid storage tank such as a bathtub that contains liquid and circulates by mixing high-pressure air into the liquid with liquid supply pump means in the liquid storage tank,
A storage tank such as a bathtub for storing liquid;
Liquid supply pump means having a liquid inlet and outlet; and
A liquid circulation pipe for circulating the liquid from the liquid storage tank to the suction port;
A liquid feed pipe for feeding liquid from the discharge port to the liquid storage tank;
A gas supply pump that mixes high-pressure air into the liquid from the suction port to the discharge port,
The liquid supply pump means includes a primary pump that sucks liquid from the liquid introduction pipe and a secondary pump that discharges liquid to the liquid supply path.
The gas supply pump is connected to mix high-pressure air into the suction port of the secondary pump,
Gas-liquid fluid ejecting means for ejecting gas-liquid fluid from the liquid feed pipe,
The gas-liquid fluid ejecting means includes a nozzle member having an inlet and an outlet,
The nozzle member is provided with a decompression cavity portion connected to the inlet, and a barrier for colliding the gas-liquid jet from the inlet into the decompression cavity portion,
The bubble generating system according to claim 1, wherein an outlet having a diameter area equal to or larger than a diameter area of the inlet is provided in the decompression cavity.

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