JP2019042700A - Fine bubble liquid generator - Google Patents

Abstract

To provide a fine bubble liquid generator capable of securing a water quantity of a sufficient quantity by preventing water pressure reduction in supply water, while securing required fine bubble density.SOLUTION: A water communication pipe 2 connected to a water service pipe 12 has a swelling part 4 diametrically expanded in a part. The swelling part 4 is provided with a support member 6 having an inner ring part 6a for holding a nozzle 5 on its inner periphery, an outer ring part 6b fixed to the swelling part 4 and a plurality of width parts 6c for connecting the inner ring part 6a and the outer ring part 6b. The nozzle 5 comprises a plurality of water intake holes 8 inclined to the axis of a supply water pipe 2 of water service in the central axis on an inlet side water intake plate 7, and service water obliquely discharged from the respective water intake holes 8 is jetted to a second water communication passage 8b by increasing a speed while turning in a spiral shape on an inner wall of a first water communication passage 8a. A fine bubble liquid of including an infinite number of ultra-fine cavitation bubbles is increased by sudden pressure reduction at this time. The fine bubble liquid is discharged to the downstream side by merging with the service water of passing between the width parts 6c opened in the support part 6 without passing through the nozzle 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a micro bubble liquid generator that refines a gas contained in a liquid to increase micro bubbles.

  In the present application, "gas" means not only air but also oxygen, hydrogen, carbon dioxide gas and the like, and "liquid" or "liquid" means tap water, underground water, agricultural water, sewage, drainage etc. In the embodiment of the present invention, “gas” is described as air, and “liquid” or “liquid” is described as an example of tap water.

  The micro bubbles are micro bubbles or nano bubbles (about 50 to 500 nm in diameter) with a bubble diameter of about 100 μm or less, and small bubbles smaller than the pores can effectively remove the dirt of the pores and sweat glands. It can be used in various fields, especially in beauty and health. And the fine bubble is utilized also for the purpose of promoting the growth of a plant besides these uses.

  In addition, the cleaning effect by the electrical action of the fine bubbles is also attracting attention. The surface of the microbubbles has a negative charge, and the microbubbles diffuse and float in water without the bubbles coalescing. Contamination due to oil, sebum, fine foreign matter or the like is usually positively charged and is electrically coupled to the object to be cleaned which is negatively charged. Therefore, when the microbubbles carrying a negative charge are adsorbed to the dirt of the positive charge, they are electrically neutralized, and the dirt is easily separated from the object to be cleaned. Then, the dirt that has been electrically neutralized and separated from the object to be washed floats on the water surface by the buoyancy of the bubbles while being adsorbed to the gas-liquid interface of the fine bubbles, whereby the dirt removed from the object to be washed is fine bubbles The liquid is washed again without being attached to the object to be washed.

  There are known high-speed shear method, pressure crush method, cavitation method, etc. to generate the liquid containing such fine bubbles, but many of them suck air from the outside by aspirator method etc. There is. Or it is injecting forcibly. For example, in Patent Document 1, cavitation is caused in the casing of a mixed fluid composed of a liquid to be accelerated by the acceleration means and a gas (bubbles having a diameter of several millimeters) introduced into the casing by the gas-liquid mixing means. There is disclosed a micro-bubble generator that generates micro-bubbles.

  Further, in Patent Document 2, a first nozzle on the inlet side for water flow which gradually reduces a cross-sectional area orthogonal to the central axis from the inlet to the outlet, and communication from the outlet of the first nozzle on the inlet side are provided. And a second nozzle on the outlet side for passing water gradually increasing the cross-sectional area orthogonal to the central axis from the inlet toward the outlet, and A microbubble generator having a side chamber is disclosed. The micro-bubble generator of Patent Document 2 generates micro-bubbles from dissolved air in water by cavitation without suctioning air from the outside.

  And the shower head provided with the micro bubble generator of the system which generates a micro bubble from the dissolved air in water by a cavitation system is known (for example, refer patent document 3).

  There is also known a washing machine which performs washing by jetting micro bubbles generated from dissolved air by a cavitation method from a fluid jetting device to laundry in a washing tank (see, for example, Patent Document 4).

Unexamined-Japanese-Patent No. 2007-21343 gazette JP, 2009-136864, A JP, 2016-2196, A JP, 2016-209331, A

  However, the micro-bubble generating device according to Patent Document 1 is a gas-liquid mixing method performed by accelerating water stored in a tank, and this method increases the size of the device, and a simple type of water pipe direct connection type is required. It is unsuitable for household use.

  The micro-bubble generating device according to Patent Document 2 adjusts the width size in the axial flow direction of the side chamber according to the situation of the water pressure, but the size is adjusted by the adjusting mechanism between the first nozzle and the second nozzle. The configuration of the entire nozzle is complicated to provide a changing side chamber.

  Moreover, in patent document 3 and patent document 4, although the throttle is provided in the flow path of tap water and fine bubbles are generated by cavitation, the tap water can not secure the necessary amount of water by passing through the throttle. There is.

  From the above point, the present invention aims to provide a micro bubble liquid generator capable of supplying a sufficient amount of water downstream at the time of supply while securing a necessary micro bubble concentration.

  In order to solve the above problems, the present invention is a microbubble liquid generator disposed in a water supply pipe, and has a bulging portion connected to the water supply pipe at both ends and partially enlarged in diameter. A water pipe, a nozzle disposed at the bulging portion, a support member for holding the nozzle in the bulging portion along the flowing direction of the tap water, and a bulging flow path of the tap water not passing through the nozzle A water passage provided in the support member so as to be formed in the portion, wherein the nozzle has a first water passage whose diameter gradually decreases along the flowing direction of tap water, and an outlet of the first water passage A second water passage which is provided in communication with the side and whose diameter gradually increases along the flowing direction of the tap water, a throttling portion which connects the first water passage and the second water passage, and the first water passage And a water intake plate provided with a plurality of water intake holes provided at the inlet. Serial intake holes, the central axis toward from the inlet side to the outlet side is inclined with respect to the central axis of the intake plate.

  The water pipe is formed by connecting a first pipe body and a second pipe body each having an enlarged diameter portion at opposite ends, and the bulging portion is the diameter expanded diameter of the first and second pipe bodies. It is good to form by joining of parts. At this time, in one embodiment, the inner diameter of the enlarged diameter portion of the first tubular body is larger than the outer diameter of the enlarged diameter portion of the second tubular body, and is within the enlarged diameter portion of the first tubular body. The support member and the enlarged diameter portion of the second tube are inserted and joined. Alternatively, the inner diameter of the enlarged diameter portion of the second tubular body is larger than the outer diameter of the enlarged diameter portion of the first tubular body, and the support member and the first diameter are included in the enlarged diameter portion of the second tubular body. The enlarged diameter portion of the tube is inserted and joined. The first tubular body may include a pressing member that clamps the outer ring portion with the second tubular body.

  In another embodiment, the first pipe body and the second pipe body are formed by joining with a pipe joint in a state in which the support member is held between the end faces of the respective enlarged diameter portions. .

  The support member includes an inner ring portion holding the nozzle at its inner periphery, an outer ring portion fixed to the bulging portion, and a plurality of ring portions connecting the inner ring and the outer ring. Configure. Therefore, a space between the radial portions becomes a water flow portion, and forms a flow path of tap water which does not pass through the nozzle.

  Another embodiment of the support member includes an outer ring portion fixed to the bulging portion, and an inner circumferential wall of the outer ring portion arranged in a circle at equal intervals inside the outer ring portion. And a plurality of nozzle support portions connected to each other and holding the nozzle at the inner periphery. In this case, a plurality of nozzles are disposed in the bulging portion, and a gap between the outer ring portion and the nozzle support portion is a water flow portion through which tap water not passing through the nozzles flows in the bulging portion and passes through the nozzles Do not form a tap water flow path.

  By bending the water intake hole from the inlet side to the outlet side, the water intake hole is twisted, so that the tap water is introduced into the first water passage as a swirl flow having a higher rotation rate.

  Then, if an uneven surface for generating turbulent flow is formed on the inner surface of the water intake hole, the degree of turbulent flow when tap water passes through the water intake hole is increased, and dissolved air in tap water becomes easy to take out, Cavitation bubbles can be generated effectively. Similarly, an uneven surface may be formed on the inner surface of the second water flow passage to generate turbulent flow.

  In addition, it is preferable that an opening adjusting mechanism that changes the opening area for each water intake hole be provided so that the tap water fed into the nozzle can be adjusted to an appropriate feeding pressure. As an example of the optimum aperture adjustment mechanism, there is an iris diaphragm mechanism formed by superposing a plurality of diaphragm blades.

  In the micro-bubble liquid generator according to the present invention, the bulging portion in which a part of the water flow pipe is expanded is configured to hold the nozzle and to arrange the support member forming the water flow portion. Since the fine bubble liquid rejoins the water that has passed through the water flow part, it is possible to supply a sufficient amount of water per unit time downstream, and the water pressure of the supplied water via the fine bubble liquid generator It is possible to effectively prevent the reduction and the decrease of the amount of water supply per unit time.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic of the tap water supply system of the house to which the micro-bubble liquid generator which concerns on this invention is applied is shown. The side cross-sectional view of a micro-bubble liquid generator is shown. The nozzle of a micro-bubble liquid generator is shown with a partially cross-sectional view. (A) shows the top view of an intake plate, (b) shows the side view of an intake plate, respectively. The support member is shown in an external perspective view. The other embodiment which connects a pipe body using a pipe joint is shown in a partial side view. The schematic explanatory drawing of the cavitation generation | occurrence | production effect | action in a nozzle is shown. The modification of the water intake hole of a water intake plate is shown, respectively. The nozzle which enabled adjustment of the opening area of a water intake using an opening adjustment mechanism is shown by a perspective view. The schematic diagram explaining the change of the opening area of the inlet port of the water intake hole adjusted with an opening adjustment mechanism is shown. The side view of the micro-bubble liquid generator of the embodiment which arranges a plurality of nozzles in a bulging part is shown. The top view of the support member used for the micro-bubble liquid generator shown in FIG. 11 is shown. FIG. 12 is a plan view showing another embodiment of a support member used in the micro-bubble liquid generator shown in FIG.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing a tap water supply system of an individual residence and an apartment building (including an office building) to which the micro-bubble liquid generator 1 according to the present invention is applied.

  The micro-bubble liquid generator 1 in the door-to-door housing 10 is inserted in the middle of the water supply pipe 3 together with the tap water quantity meter (meter) 11, and is disposed downstream of the quantity water quantity meter (meter) 11. The water supply pipe 3 is connected to a water supply pipe 12 branched from the water supply main 14 toward the house 10 via a water stop valve 13. Therefore, the micro-bubble liquid generator 1 generates many micro-bubbles in the tap water flowing through the water heater 11, and the generated micro-bubble liquid is branched from the downstream side of the water supply pipe 3. It is supplied from each water tap 15 in the house 10 from the branch water supply pipe 14.

  In the illustrated apartment complex 20, tap water is provided with a water receiving tank 15 downstream of the same water pipe 12, water stop valve 13 and water heater 11 as described above, and the stored water in the water receiving tank 15 is elevated by the pump 16 After being lifted and stored in the water tank 17, it is supplied to each door by weight. The micro-bubble liquid generator 1 in this case is inserted along with the water discharger 11 a in the middle of the water supply pipe 3 of each residence, and the micro-bubble liquid is supplied from each water tap 15.

  In addition, in a housing complex or an office building, there are various types of tap water supply systems downstream from the water pipe 12 according to the scale of the building. For example, (1) a type in which the water pump 15 directly pumps water to the elevated water tank 17 without the water receiving tank 15 and (2) a type in which the water tank 15 alone pumps the water separately in each door (3) There is a simple water supply direct connection type similar to a single-family house, and (4) a type provided with a water receiving tank 15, a pump 16, and an elevated water tank 17. Even in the type of (4), there are types such as the type supplied by free fall from the elevated water tank 17 as in the above-mentioned apartment complex 20 and the type supplied by the pump provided in each door. However, regardless of the type, the micro-bubble liquid generator 1 is installed after passing through the water meter.

  FIG. 2 shows a configuration of the micro-bubble liquid generator 1 partially in a side view in cross section. The micro bubble liquid generator 1 includes a water flow pipe 2 through which tap water flows in a direction indicated by an arrow, a nozzle 5 disposed in a bulging portion 4 formed in a central portion of the water flow pipe 2, and a nozzle 5 And a supporting member 6 for holding the inside of the bulging portion 4.

  The water flow pipe 2 is formed by connecting the pipe 2A and the pipe 2B, and the ends of the pipe 2A and the pipe 2B facing each other are expanded in diameter. The diameter of the enlarged diameter portion of the tube body 2B is larger than the diameter of the expanded diameter portion of the tube body 2A, and the enlarged diameter portion of the tube body 2A is inserted into the enlarged diameter portion of the tube body 2B. The screw formed on is screwed and connected. Thus, when the pipe bodies 2A and 2B are connected at their enlarged diameter portions, the connection portion forms the bulging portion 4 of the water flow pipe 2.

  The ends on the opposite side of the ends provided with the enlarged diameter portions of the pipes 2A and 2B are connected to the water supply pipe 3 by the pipe connection device 18, respectively, and the tap water passing through the water supply pipe 3 flows in the arrow direction. As the pipe connection device 18, for example, a ring-shaped gasket fitted over the outer periphery of the end of the pipe to be connected, and a pair in which both ends are connected by a fastener so as to hold the gasket. There is also a case where a housing type pipe joint configured with the housing of

  FIG. 3 shows the nozzle 5 in a side sectional view and comprises a first cylindrical portion 5a and a second cylindrical portion 5b. The first cylindrical portion 5a is formed of a bottomed cylindrical body, and the bottom surface is a second cylindrical portion. A hole communicating with 5b is provided. In the first cylindrical portion 5a, the circular water intake plate 7 is inserted by screwing the side portion of the outer periphery with the inner periphery. At this time, the peripheral edge of the water intake plate 7 is the first cylindrical portion 5a. It is locked at the bottom surrounding the hole. A taper 39 is annularly formed at an end on the intake side of the first cylindrical portion 5a so as to easily take in tap water.

  In this example, the intake plate 7 has a thickness dimension t of 5 mm, for example, for a diameter dimension d of 13.5 mm. In the water intake plate 7, for example, four circular water intake holes 8 penetrating in the axial direction at equal intervals on a plane are formed in a circle. In addition, the number of the water intake holes 8 can be plural (for example, about 2 to 8). And as this intake plate 7 is shown to Fig.4 (a), the intake holes 8 of the 4 round holes which penetrate in an axial direction at equal intervals on a plane at a circle are drilled. As shown in the side view of FIG. 4 (b), the water intake hole 8 has a central axis L from the tap water inlet side to the outlet side at a predetermined angle α with respect to the central axis H of the water intake plate 7. For example, it is bored in the intake plate 7 in the shape of an inclined cylinder inclined at 15 degrees.

  The inclination direction of each water intake hole 8 at this time is formed to be directed in the counterclockwise direction in the drawing as shown by the arrow. As a result, since the tap water sent in the horizontal direction is discharged in the inclined direction by passing through the respective intake holes 8, a twist is added to the tap water flow. Therefore, the intake plate 7 is screwed with the first cylindrical portion 5a with the left screw in the same rotational direction as the discharged water flow, so that the screw tightening direction and the released water rotation direction do not coincide with each other. . In FIG. 4B, only one of the water intake holes 8 is shown as a representative.

  In the second cylindrical portion 5b of the nozzle 5, a first water passage 21 whose inner diameter gradually narrows from the first cylindrical portion 5a toward the central portion, a throttling portion 22 connected to the first water passage 21, and a throttling portion A second water passage 23 is formed which is connected to the outlet 22 and whose internal diameter gradually increases toward the outlet side.

  In this example, the bore diameter at the inlet side of the first water flow path 21 of the nozzle 5 is set larger than the bore diameter at the outlet side of the second water flow path 23, and between the first water flow path 21 and the second water flow path 23. The axial dimension is set longer than the second water passage 8b. The diameter and length of the inlet of the first water flow passage 21 can be varied in size depending on the situation in order to control the water pressure and the amount of fine air bubbles generated.

  The throttling portion 22 is provided to connect the ends on the small diameter side of the first and second water passages 21 and 23 with each other.

  As shown in FIG. 5, the supporting member 6 has an inner ring portion 6a whose inner diameter is equal to the diameter of the outer periphery of the second cylindrical portion 5b of the nozzle 5 and an outer diameter equal to the inner diameter of the enlarged diameter portion of the tube 2B. It is comprised from the outer ring part 6b and the three radial parts 6c which connect the inner ring part 6a and the outer ring part 6b radially so that a central angle may become equal. The space between the radial portions 6 c is the water flow portion 11 of the tap water flowing through the water flow pipe 2.

  Then, on the outer periphery of the outer ring portion 6b of the support member 6, an external thread 61 is formed to be screwed with the female screw 2a formed on the inner periphery of the enlarged diameter portion of the tube 2B. A female screw 62 is formed to be screwed with the male screw 51 provided on the outer periphery of the second cylindrical portion 5 b of the nozzle 5. Therefore, the support member 6 is screwed and fixed to the nozzle 5 inserted into the inner ring portion 6a, and the outer ring portion 6b is screwed into the tubular body 2A, so that the nozzle 5 is expanded in the bulging portion 4 Hold on.

  A pressing member 29 for holding the support member 6 is fixedly attached to the tubular body 2B continuously or intermittently along the inner periphery thereof. The pressing member 29 receives the tap water pressure and prevents the water hammer by fulfilling the function of the cushion when the supporting member 6 is moved to the downstream side, which is the left direction in the drawing. Such a pressing member 29 is formed of an elastic member such as a spring member or a member having flexibility.

  Then, on the outer periphery of the disc 9, an external thread 9b is formed to be screwed with the internal thread 2a provided on the inner periphery of the enlarged diameter portion of the tube 2A. A female screw 9c is formed to be screwed with the male screw 5c provided on the outer periphery of the two cylindrical portion 5b. Therefore, the support member 6 in this example is fixed by screwing the nozzle 5 inserted into the center hole 9a and screwing the disc 9 into the tube 2A at its outer periphery to expand the nozzle 5 Hold in the outlet 4.

  FIG. 6 shows a further embodiment of the connection of the tubes 2A, 2B in a side view, in which the tubes 19 are used to connect the tubes 2A, 2B. Here, the diameter of each enlarged diameter portion of the tubes 2A and 2B is equal, and at the same time, the outer diameter of the support member 6 is also equal to the diameter of each enlarged diameter portion of the tubes 2A and 2B. Then, male screws are provided on the outer peripheries of the tubular members 2A and 2B and the supporting member 6, and when the tubular members 2A and 2B sandwich and support the supporting member 6, these male screws are connected continuously. Form a threaded part to be screwed with a female screw provided on the inner circumference of the. As a result, the pipe joint 19 fixes the state in which the support member 6 is sandwiched by the ends of the enlarged diameter portions of the pipe bodies 2A and 2B. In this case, in the case of the supporting member 6 shown in FIG. 2, both side surfaces of the outer ring portion 6b are sandwiched by the pipes 2A and 2B and fixed by the pipe joint 19. In the case of the supporting member 6 shown in FIG. The peripheries on both sides of the disc 9 are sandwiched by the pipes 2A and 2B and fixed by the pipe joint 19.

  In the above configuration, when the tap water reaches the bulging portion 4 of the water flow pipe 2 from the water supply pipe 3, the tap water passes through the nozzle 5 and the flow path passing through the water flow portion 11 of the support member 6b Bifurcated. Then, a fine bubble liquid is generated from the tap water passing through the nozzle 5, and the generated fine bubble liquid is mixed with the tap water passing through the water passage 11 and sent to the downstream water flow pipe 2. Therefore, by providing the bulging part 4 in the water flow pipe 2 and branching the flow of the tap water, it is possible to send the tap water containing the fine bubble liquid downstream without reducing the amount of water.

  In this case, since the flow path of the nozzle 4 is narrowed, the tap water flowing in the bulging portion 4 is in high pressure and the flow velocity rises, so most of the tap water flowing in the water flow pipe 2 is the water flowing portion 11 Will pass. However, when the amount of water passing through the water passage 11 is large, it is not possible to maintain a sufficient concentration of the fine bubbles when mixed with the fine bubble liquid generated by the nozzle 5 downstream. Therefore, it is preferable that the amount of water passing through the water flow portion 11 in the bulging portion 4 is about 80% of the whole so that the rest flows to the nozzle 5. Furthermore, the water flow rate from the water supply pipe 3 to the bulging portion 4 of the water flow pipe 2 is preferably at least 80% or more.

  Here, the micro bubble liquid production | generation effect | action in the nozzle 5 is demonstrated. The tap water passing through each intake hole 8 of the intake plate 7 passes through the intake hole 8 in the shape of a diagonal cylinder, and deviates from the direction of the central axis H of the intake plate 7 and the central axis of the oblique intake hole 8 It is released in the direction of L. Therefore, as described in FIG. 4, the tap water passing through each intake hole 8 is introduced into the first water passage 21 of the nozzle 5 as a swirl flow twisted in the same direction as indicated by the arrows. Ru.

  As a result, the tap water having passed through the water intake hole 8 obliquely strikes the inner wall of the first water flow passage 21, and thus advances to the throttling portion 22 while being spirally swirled as schematically shown in FIG. Then, since the first water passage 21 has a shape in which the inner diameter is narrowed along the flowing direction, when it flows to the throttling portion 22 while increasing the swirling speed toward the throttling portion 22 and passes through the throttling portion 22, It is jetted at high pressure to the second water passage 23 and diffused in the second water passage 23.

  Therefore, a rapid pressure drop occurs in the tap water, and innumerable fine cavitation bubbles are generated in the second water passage 23 by the boiling phenomenon and released to the pipe body 2B. At this time, the diameter of the inlet side of the first water flow passage 21 of the nozzle 5 is larger than the diameter of the outlet side of the second water flow passage 23.

  Then, in the tubular body 2B, the micro-bubble liquid generated from the tap water passing through the nozzle 5 and the tap water mixed with the water passing portion 11 of the support member 6 without passing through the nozzle 5 , Is released to the tube 2B. At this time, when the tap water passes through the enlarged diameter portion of the pipe body 2B, the diameter of the pipe becomes narrow again, so that the speed is increased to flow from the pipe body 2B to the water pipe downstream.

  As described above, if the flow path of the tap water is narrowed to generate the cavitation bubbles, the pressure loss in the narrowed portion becomes large, and there is a possibility that a sufficient amount of tap water can not be supplied downstream per unit time. . Therefore, in the micro-bubble liquid generator 1 according to the present invention, the bulging portion 4 is provided in the water flow pipe 2 and the nozzle 5 is disposed in the bulging portion 4 so that the flow rate of the tap water is bulging portion 4 The pressure is increased to increase the passing pressure, and the pressure is branched into a flow passage passing through the water passage 11 and a flow passage passing through the nozzle 5. Then, after branching, in the tubular body 2B, by combining the fine bubble liquid generated by the nozzle 5 and the tap water having passed through the water flow portion 11, a sufficient amount of tap water is downstream per unit time. It is possible to supply to

On the other hand, the provision of the bulging portion 4 accelerates the flow rate of the tap water. In general, tap water is supplied at a minimum water pressure of 1.5 kgf / cm ² (0.15 MPa), ideally 2.0 to 4.0 kgf / cm ² (0.2 to 0.39 MPa). However, cavitation in the nozzle 5 may not be effectively performed if the pressure is lower than the lower limit depending on the shape of the bulging portion 4.

  Therefore, the nozzle 5 in the micro-bubble liquid generator 1 according to the present invention arranges the intake plate 7 provided with the intake hole 8 at the inlet side, and takes in tap water through the intake hole 8 to obtain tap water. I am increasing the flow rate. Moreover, the shape of the water intake hole 8 is an oblique cylinder, and the flow velocity is further raised by rotating the tap water passing through the water intake hole 8 to create a swirl flow. As a result, even if the outer diameter of the bulging portion 4 is large, cavitation is effectively performed because the flow velocity is increased again when taking in the nozzle 5 by providing the guide at the water intake port 8.

  By making the inner wall surface of the hole into a concavo-convex surface 8a as shown in FIG. 8A, the tap water is discharged from the water intake hole 8 while increasing the degree of turbulent flow. In this example, a large number of protrusions are provided to form the uneven surface 8a. When the degree of turbulent flow is improved in this manner, dissolved air in tap water can be easily taken out, and cavitation bubbles can be effectively generated in the nozzle 5.

  Furthermore, as shown in FIG. 8 (b), the shape of the water intake hole 8 may be a shape in which a bent portion is provided in an oblique cylinder from the inlet side to the outlet side to add a twist. Thereby, when passing through the water intake hole 8, twist is added to the flow of the tap water, and it is possible to generate a swirling flow having a higher rotation rate in the first water passage 8a. Also in this case, if the inner wall of the water intake hole 8 is made to be the uneven surface 8a, the generation effect of cavitation bubbles in the nozzle 5 is further enhanced in combination with the improvement of the turbulent flow degree.

  In addition, if the surface of the inner wall of the second water flow passage 23 of the nozzle 5 is also processed to be uneven, when a negative pressure is generated, if the diffused fine bubbles further hit the inner wall surface, the bubbles are promoted to be finer. It is possible to generate tap water containing a high concentration of fine bubbles.

  In addition, it is preferable that the opening area of the water intake hole 7 can be adjusted at the time of installation when an appropriate supply pressure can not be obtained in a water supply situation depending on the area or place, or a collective housing using an elevated water tank. FIG. 9 is a perspective view showing the nozzle 5 provided with the water intake plate 7 in which the opening area of the water intake hole 7 can be adjusted using the opening adjustment mechanism 24. The opening adjustment mechanism 24 is an orifice configured to include an iris diaphragm mechanism so as to change the opening area of the water intake hole 7. The iris diaphragm mechanism is generally known as a diaphragm of a camera lens or the like, and as shown in (a) to (d) of FIG. 10, for example, the central opening 25 (water intake hole 7) becomes substantially circular. The area of the water intake hole 7 is changed in four ways by rotating the plurality of throttle pieces 30 superimposed in this manner by driving a gear (not shown). In this case, the gears of the opening adjusting mechanisms 24 are simultaneously driven by rotating the hole diameter adjusting dial 37 provided on the outer periphery of the first cylindrical portion 5a of the nozzle 5, and the opening areas of the water intake holes 8 are all the same. It is configured to be adjustable in size.

  By providing such an opening adjustment mechanism 24, when the feed pressure of tap water is low, the feed pressure can be increased and introduced to the nozzle 5 by reducing the opening area of the water intake hole 8, The feed pressure of the tap water to the nozzle 5 can be adjusted to be constant.

  Although the micro-bubble liquid generator 1 of the said embodiment is comprised by one nozzle 5, by providing the bulging part 4, you may arrange multiple nozzles with a small aperture.

  FIG. 11 is a partial side view showing a micro bubble liquid generator 1A according to an embodiment provided with three nozzles 31. As shown in FIG. In the figure, components similar to the components shown in FIG. 2 (first embodiment) described above are denoted by the same reference numerals. That is, the water flow pipe 2 is formed by connecting the first pipe body 2A and the second pipe body 2B each having an enlarged diameter portion at opposite ends, and the bulging portion 4 is formed by joining the respective enlarged diameter portions. It is formed. Moreover, although the nozzle 31 has a structure similar to the above-described nozzle 5, the diameter is made smaller because a plurality of nozzles 31 are used.

  And although the 1st tube 2A is inserted into the 2nd tube 2B and screwed together similarly to the composition explained in Drawing 2, the bulging part 4 by joining of a diameter-increased part of each other is formed, In this case, the receiving portion 38 is formed in the second tubular body 2B, and the supporting member 32 is sandwiched between the receiving portion 38 and the end face of the enlarged diameter portion of the first tubular body 2A. Will be held by Furthermore, when the support member 6 receives tap water pressure and moves to the downstream side, the above-mentioned pressing member 29 which is an elastic member for preventing the water hammer is attached to the receiving portion 38 by performing the function of a cushion. It is done.

  The support member 32 in this embodiment is, as shown in FIG. 12, an outer ring portion 33 fixed to the bulging portion 4 by screwing at its peripheral portion, and a circular shape at equal intervals inside the outer ring portion 33. , And are connected by the inner peripheral wall of the outer ring portion 33 and the connection portion 34, and each of the nozzle support portions 35 is provided with three types of nozzle support portions 35 for holding the nozzles 31 by screwing. Each nozzle support portion 35 is integrally formed, and each has a shape extending radially from the center of the outer ring portion 33, and the gap between the outer ring portion 33 and the nozzle support portion 35 is bulged. It becomes the water flow part 36 in which the tap water which does not pass the nozzle 31 in the part 4 flows. Further, the central portion of the support member 32 overlapping the center of the support member 32 is rolled out to form a central hole 36 a that constitutes a part of the water flow portion 36. Thereby, 80% or more of said water flow rate in the bulging part 4 is ensured.

  In the case of the water flow pipe 2 having a large diameter, as shown in FIG. 13, the support member 32A may be provided with four nozzle support portions 35 to hold four nozzles 31. Alternatively, two nozzles 31 may be provided by arranging two nozzle supports 35 symmetrically with respect to the center hole 36A.

  As described above, the micro-bubble liquid generator provided with the support members 32 and 32A capable of supporting the plurality of nozzles 31 has the injection output of the micro-bubble liquid from the nozzles 31, the micro-bubble amount, and the tap water passing through the water passage 36 The number of nozzles 31 can be adjusted so that the optimal amount of tap water and the concentration of the micro bubble liquid can be secured from the micro bubble liquid generator 1 according to the respective conditions such as the amount of. The adjustment may be performed by enlarging or reducing the shape of the nozzles 31 instead of the number of the nozzles 31.

  The present invention is not limited to the above embodiment, and various modifications are possible based on the spirit of the present invention. For example, when it is necessary to provide a large number of water intake holes 8 depending on the flow rate of the tap water piping etc. to be installed, the water intake holes 8 should be in the plane of the water intake plate 7 rather than circularly arranged at equal intervals. It is preferable to arrange uniformly.

  And also in the nozzle 5, the diameter of the entrance side of the 1st water flow passage 21 is made larger than the diameter of the exit side of the 2nd water flow passage 23, and the above-mentioned embodiment makes the distance in the central axis direction the 2nd water flow passage 23 Is longer, but may be reversed, or may be configured to be symmetrical with the same aperture centered on the narrowed portion 22. The point is that the relationship between the pressure of the tap water spouted from the first water passage 21 and the pressure that decreases due to the diffusion in the second water passage 23 makes it possible to obtain an appropriate amount and high quality cavitation bubbles as fine bubbles. It is set so that it can be generated.

  Then, in order to generate the fine bubbles more efficiently, the nozzles 5 may be arranged in series at a certain interval.

  As described above in detail, in the fine bubble liquid generator, the bulging portion in which a part of the water flow pipe is expanded holds the nozzle and the support member for forming the water flow portion is disposed, so that In order to recombine the fine bubble liquid to be generated with the water passing through the water flow section, it is possible to supply a sufficient amount of water per unit time downstream, and the feed water via the fine bubble liquid generator It is possible to effectively prevent the reduction of water pressure and the decrease of water supply volume per unit time.

DESCRIPTION OF SYMBOLS 1 micro bubble liquid generator 1A micro bubble liquid generator 2 water flow pipe 2A 1st pipe body 2B 2nd pipe body 4 bulging part 5 nozzle 6 support member 6a inner ring part 6b outer ring part 6c ring part 7c intake part 7 water intake plate 8 water intake Hole 12 Water pipe 21 first water passage 22 throttling portion 23 second water passage 24 opening adjustment mechanism 29 pressing member 32 support member 33 outer ring portion 35 nozzle support portion

Claims (15)

A micro bubble liquid generator disposed in a water pipe,
A water pipe having a bulging portion which is connected to the water pipe at both ends and is partially expanded in diameter;
A nozzle disposed at the bulging portion;
A support member for holding the nozzle in a direction in which tap water flows in the bulging portion;
A water passage portion provided on the support member to form a flow path of tap water not passing through the nozzle in the bulging portion;
Equipped with
The nozzle is
The first water passage whose diameter gradually decreases along the flow direction of the tap water,
A second water passage which is provided in communication with the outlet side of the first water passage and whose diameter gradually increases along the flowing direction of the tap water;
A throttling portion connecting the first water passage and the second water passage;
An intake plate provided with a plurality of intake holes provided at an inlet portion of the first water passage;
Have
The micro bubble liquid generator according to claim 1, wherein a central axis of the intake hole from an inlet side to an outlet side is inclined with respect to a central axis of the intake plate.   The water pipe is formed by connecting a first pipe body and a second pipe body each having an enlarged diameter portion at opposite ends, and the bulging portion is the diameter expanded diameter of the first and second pipe bodies. The micro-bubble liquid generator according to claim 1, which is formed by bonding parts to each other.   The inner diameter of the enlarged diameter portion of the first tube body is larger than the outer diameter of the enlarged diameter portion of the second tube body, and the support member and the second tube body are in the enlarged diameter portion of the first tube body The micro bubble liquid generator according to claim 2, which is joined by inserting the enlarged diameter portion of   The micro bubble liquid production according to claim 2, wherein the first pipe body and the second pipe body are joined by a pipe joint in a state in which the support member is held between the end faces of the respective enlarged diameter portions. vessel. The support member is
An inner ring portion which holds the nozzle at its inner periphery;
An outer ring portion fixed to the bulging portion;
A plurality of spokes connecting the inner ring portion and the outer ring portion;
The micro-bubble liquid generator according to claim 1, comprising: The water pipe is formed by connecting a first pipe and a second pipe each having an enlarged diameter portion at opposite ends thereof,
The inner diameter of the enlarged diameter portion of the first tube or the second tube is larger than the outer diameter of the enlarged diameter portion of the second tube or the first tube, and the first tube or the first tube The enlarged diameter portion of the second tube or the first tube is inserted into and joined to the enlarged diameter portion of the two-tubes,
The outer periphery of the outer ring portion is fixed to the inner periphery of the first pipe or the second pipe together with the outer periphery of the second pipe or the first pipe, in the support member. 6. A fine bubble liquid generator according to item 5.   The micro bubble liquid generator according to claim 6, wherein the first pipe or the second pipe includes a pressing member configured to hold the outer ring portion with the second pipe or the first pipe. The water pipe is formed by connecting a first pipe and a second pipe each having an enlarged diameter portion at opposite ends thereof,
The first pipe body and the second pipe body are joined by a pipe joint in a state in which the peripheral edge portions of the surfaces on both sides of the outer ring portion are held between the end faces of the respective enlarged diameter portions. 5. The micro bubble liquid generator according to 5. The support member is
An outer ring portion fixed to the bulging portion;
A plurality of nozzle support parts which are arranged in a circle at equal intervals inside the outer ring part and connected to the inner peripheral wall of the outer ring part, each holding the nozzle on the inner circumference;
The micro-bubble liquid generator according to claim 1, comprising:   The micro air bubble liquid generator according to claim 1, wherein a plurality of the water intake holes are provided circularly at equal intervals.   The micro bubble liquid generator according to claim 1, wherein an uneven surface for generating turbulent flow is formed on an inner surface of the water intake hole.   The micro bubble liquid generator according to claim 1, wherein an uneven surface for generating turbulent flow is formed on an inner surface of the second water passage.   The micro bubble liquid generator according to claim 1, wherein the water intake hole is bent from the inlet side to the outlet side of the tap water.   The micro bubble liquid generator according to claim 1, further comprising an opening adjusting mechanism that changes an opening area for each water intake hole.   The micro bubble liquid generator according to claim 14, wherein the aperture adjustment mechanism is an iris diaphragm mechanism formed by overlapping a plurality of diaphragm blades.

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